Merge branch 'testing' into be

73 files changed, 1433 insertions, 1261 deletions

diff --git a/src/ipcpd/config.h.in b/src/ipcpd/config.h.in
index b9961b01..afce5e86 100644
--- a/src/ipcpd/config.h.in
+++ b/src/ipcpd/config.h.in
@@ -63,3 +63,5 @@
 #cmakedefine HAVE_NETMAP
 #cmakedefine HAVE_BPF
 #cmakedefine HAVE_RAW_SOCKETS
+#define IPCP_ETH_RD_THR  @IPCP_ETH_RD_THR@
+#define IPCP_ETH_WR_THR  @IPCP_ETH_WR_THR@
diff --git a/src/ipcpd/eth/CMakeLists.txt b/src/ipcpd/eth/CMakeLists.txt
index 6b8d1a77..6672f93c 100644
--- a/src/ipcpd/eth/CMakeLists.txt
+++ b/src/ipcpd/eth/CMakeLists.txt
@@ -14,30 +14,31 @@ include_directories(${CMAKE_BINARY_DIR}/include)
 
 find_path(NETMAP_C_INCLUDE_DIR
   net/netmap_user.h
-  HINTS /usr/include /usr/local/include
-)
+  HINTS /usr/include /usr/local/include)
 
 mark_as_advanced(NETMAP_C_INCLUDE_DIR)
 
+# Check for raw sockets
 if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
   set(DISABLE_RAW_SOCKETS FALSE CACHE BOOL
     "Disable raw socket support for Ethernet IPCPs")
   if (NOT DISABLE_RAW_SOCKETS)
     message(STATUS "Raw socket support for Ethernet IPCPs enabled")
     set(HAVE_RAW_SOCKETS TRUE PARENT_SCOPE)
+    set(HAVE_RAW_SOCKETS TRUE)
     set(HAVE_ETH TRUE)
   else ()
     message(STATUS "Raw socket support for Ethernet IPCPs disabled by user")
+    unset(HAVE_RAW_SOCKETS PARENT_SCOPE)
     unset(HAVE_RAW_SOCKETS)
-    unset(HAVE_ETH)
   endif ()
 endif ()
 
+# Check for BPF
 if (NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
   find_path(BPF_C_INCLUDE_DIR
-            net/bpf.h
-            HINTS /usr/include /usr/local/include
-  )
+    net/bpf.h
+    HINTS /usr/include /usr/local/include)
 
   mark_as_advanced(BPF_C_INCLUDE_DIR)
 
@@ -46,46 +47,51 @@ if (NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
       "Disable Berkeley Packet Filter support for Ethernet IPCPs")
     if (NOT DISABLE_BPF)
       message(STATUS "Berkeley Packet Filter support "
-                     "for Ethernet IPCPs enabled")
+        "for Ethernet IPCPs enabled")
       set(HAVE_BPF TRUE PARENT_SCOPE)
+      set(HAVE_BPF TRUE)
       set(HAVE_ETH TRUE)
     else ()
       message(STATUS "Berkeley Packet Filter support "
-                     "for Ethernet IPCPs disabled by user")
+        "for Ethernet IPCPs disabled by user")
+      unset(HAVE_BPF PARENT_SCOPE)
       unset(HAVE_BPF)
-      unset(HAVE_ETH)
     endif ()
   endif ()
 endif ()
 
-if (NETMAP_C_INCLUDE_DIR)
+# Check for netmap exclusively
+if (NOT HAVE_RAW_SOCKETS AND NOT HAVE_BPF AND NETMAP_C_INCLUDE_DIR)
   set(DISABLE_NETMAP FALSE CACHE BOOL
-      "Disable netmap support for ETH IPCPs")
+    "Disable netmap support for ETH IPCPs")
   if (NOT DISABLE_NETMAP)
     message(STATUS "Netmap support for Ethernet IPCPs enabled")
-    set(HAVE_NETMAP TRUE PARENT_SCOPE)
     test_and_set_c_compiler_flag_global(-std=c99)
+    set(HAVE_NETMAP TRUE PARENT_SCOPE)
     set(HAVE_ETH TRUE)
   else ()
     message(STATUS "Netmap support for Ethernet IPCPs disabled by user")
-    unset(HAVE_NETMAP)
-    unset(HAVE_ETH)
-    unset(IPCP_ETH_TARGET CACHE)
+    unset(HAVE_NETMAP PARENT_SCOPE)
   endif ()
 endif ()
 
 if (HAVE_ETH)
   message(STATUS "Supported raw packet API found, building eth-llc and eth-dix")
 
+  set(IPCP_ETH_RD_THR 3 CACHE STRING
+    "Number of reader threads in Ethernet IPCP")
+  set(IPCP_ETH_WR_THR 3 CACHE STRING
+    "Number of writer threads in Ethernet IPCP")
+
   set(ETH_LLC_SOURCES
     # Add source files here
     ${CMAKE_CURRENT_SOURCE_DIR}/llc.c
-  )
+    )
 
   set(ETH_DIX_SOURCES
     # Add source files here
     ${CMAKE_CURRENT_SOURCE_DIR}/dix.c
-  )
+    )
 
   set(IPCP_ETH_LLC_TARGET ipcpd-eth-llc CACHE INTERNAL "")
   set(IPCP_ETH_DIX_TARGET ipcpd-eth-dix CACHE INTERNAL "")
diff --git a/src/ipcpd/eth/eth.c b/src/ipcpd/eth/eth.c
index 443f3fdb..1bbfac5b 100644
--- a/src/ipcpd/eth/eth.c
+++ b/src/ipcpd/eth/eth.c
@@ -29,6 +29,8 @@
 #define _DARWIN_C_SOURCE
 #elif defined(__FreeBSD__)
 #define __BSD_VISIBLE 1
+#elif defined (__linux__) || defined (__CYGWIN__)
+#define _DEFAULT_SOURCE
 #else
 #define _POSIX_C_SOURCE 200112L
 #endif
@@ -121,7 +123,7 @@
 #define DIX_HEADER_SIZE      (DIX_EID_SIZE + DIX_LENGTH_SIZE)
 #define ETH_HEADER_TOT_SIZE  (ETH_HEADER_SIZE + DIX_HEADER_SIZE)
 #define MAX_EIDS             (1 << (8 * DIX_EID_SIZE))
-#define ETH_MAX_SDU_SIZE     (ETH_MTU - DIX_HEADER_SIZE)
+#define ETH_MAX_PACKET_SIZE  (ETH_MTU - DIX_HEADER_SIZE)
 #define ETH_FRAME_SIZE       (ETH_HEADER_SIZE + ETH_MTU_MAX)
 #elif defined(BUILD_ETH_LLC)
 #define THIS_TYPE            IPCP_ETH_LLC
@@ -129,7 +131,7 @@
 #define LLC_HEADER_SIZE      3
 #define ETH_HEADER_TOT_SIZE  (ETH_HEADER_SIZE + LLC_HEADER_SIZE)
 #define MAX_SAPS             64
-#define ETH_MAX_SDU_SIZE     (ETH_MTU - LLC_HEADER_SIZE)
+#define ETH_MAX_PACKET_SIZE  (ETH_MTU - LLC_HEADER_SIZE)
 #define ETH_FRAME_SIZE       (ETH_HEADER_SIZE + ETH_MTU_MAX)
 #endif
 
@@ -144,15 +146,27 @@
 #define NAME_QUERY_REPLY     3
 
 struct mgmt_msg {
-        uint8_t  code;
 #if defined(BUILD_ETH_DIX)
         uint16_t seid;
         uint16_t deid;
 #elif defined(BUILD_ETH_LLC)
         uint8_t  ssap;
         uint8_t  dsap;
+        /* QoS here for alignment */
+        uint8_t  code;
+        uint8_t  availability;
+#endif
+        /* QoS parameters from spec, aligned */
+        uint32_t loss;
+        uint64_t bandwidth;
+        uint32_t ber;
+        uint32_t max_gap;
+        uint32_t delay;
+        uint8_t  in_order;
+#if defined (BUILD_ETH_DIX)
+        uint8_t  code;
+        uint8_t  availability;
 #endif
-        uint8_t  qoscube;
         int8_t   response;
 } __attribute__((packed));
 
@@ -192,6 +206,7 @@ struct {
         struct shim_data * shim_data;
 #ifdef __linux__
         int                mtu;
+        int                if_idx;
 #endif
 #if defined(HAVE_NETMAP)
         struct nm_desc *   nmd;
@@ -213,11 +228,10 @@ struct {
 #endif
         struct ef *        fd_to_ef;
         fset_t *           np1_flows;
-        fqueue_t *         fq;
         pthread_rwlock_t   flows_lock;
 
-        pthread_t          sdu_writer;
-        pthread_t          sdu_reader;
+        pthread_t          packet_writer[IPCP_ETH_WR_THR];
+        pthread_t          packet_reader[IPCP_ETH_RD_THR];
 
 #ifdef __linux__
         pthread_t          if_monitor;
@@ -258,10 +272,6 @@ static int eth_data_init(void)
         if (eth_data.np1_flows == NULL)
                 goto fail_np1_flows;
 
-        eth_data.fq = fqueue_create();
-        if (eth_data.fq == NULL)
-                goto fail_fq;
-
         for (i = 0; i < SYS_MAX_FLOWS; ++i) {
 #if defined(BUILD_ETH_DIX)
                 eth_data.fd_to_ef[i].r_eid = -1;
@@ -309,8 +319,6 @@ static int eth_data_init(void)
  fail_flows_lock:
         shim_data_destroy(eth_data.shim_data);
  fail_shim_data:
-        fqueue_destroy(eth_data.fq);
- fail_fq:
         fset_destroy(eth_data.np1_flows);
  fail_np1_flows:
 #ifdef BUILD_ETH_LLC
@@ -337,7 +345,6 @@ static void eth_data_fini(void)
         pthread_mutex_destroy(&eth_data.mgmt_lock);
         pthread_rwlock_destroy(&eth_data.flows_lock);
         shim_data_destroy(eth_data.shim_data);
-        fqueue_destroy(eth_data.fq);
         fset_destroy(eth_data.np1_flows);
 #ifdef BUILD_ETH_LLC
         bmp_destroy(eth_data.saps);
@@ -376,7 +383,7 @@ static int eth_ipcp_send_frame(const uint8_t * dst_addr,
 
         assert(frame);
 
-        if (len > (size_t) ETH_MAX_SDU_SIZE)
+        if (len > (size_t) ETH_MAX_PACKET_SIZE)
                 return -1;
 
         e_frame = (struct eth_frame *) frame;
@@ -438,7 +445,7 @@ static int eth_ipcp_alloc(const uint8_t * dst_addr,
                           uint8_t         ssap,
 #endif
                           const uint8_t * hash,
-                          qoscube_t       cube)
+                          qosspec_t       qs)
 {
         uint8_t *         buf;
         struct mgmt_msg * msg;
@@ -458,7 +465,14 @@ static int eth_ipcp_alloc(const uint8_t * dst_addr,
 #elif defined(BUILD_ETH_LLC)
         msg->ssap    = ssap;
 #endif
-        msg->qoscube = cube;
+
+        msg->delay        = hton32(qs.delay);
+        msg->bandwidth    = hton64(qs.bandwidth);
+        msg->availability = qs.availability;
+        msg->loss         = hton32(qs.loss);
+        msg->ber          = hton32(qs.ber);
+        msg->in_order     = qs.in_order;
+        msg->max_gap      = hton32(qs.max_gap);
 
         memcpy(msg + 1, hash, ipcp_dir_hash_len());
 
@@ -528,7 +542,7 @@ static int eth_ipcp_req(uint8_t *       r_addr,
                         uint8_t         r_sap,
 #endif
                         const uint8_t * dst,
-                        qoscube_t       cube)
+                        qosspec_t       qs)
 {
         struct timespec ts = {0, ALLOC_TIMEO * MILLION};
         struct timespec abstime;
@@ -552,7 +566,7 @@ static int eth_ipcp_req(uint8_t *       r_addr,
         }
 
         /* reply to IRM, called under lock to prevent race */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), cube);
+        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -692,11 +706,20 @@ static int eth_ipcp_mgmt_frame(const uint8_t * buf,
                                uint8_t *       r_addr)
 {
         struct mgmt_msg * msg;
+        qosspec_t         qs;
 
         msg = (struct mgmt_msg *) buf;
 
         switch (msg->code) {
         case FLOW_REQ:
+                qs.delay = ntoh32(msg->delay);
+                qs.bandwidth = ntoh64(msg->bandwidth);
+                qs.availability = msg->availability;
+                qs.loss = ntoh32(msg->loss);
+                qs.ber = ntoh32(msg->ber);
+                qs.in_order = msg->in_order;
+                qs.max_gap = ntoh32(msg->max_gap);
+
                 if (shim_data_reg_has(eth_data.shim_data,
                                       buf + sizeof(*msg))) {
                         eth_ipcp_req(r_addr,
@@ -706,7 +729,7 @@ static int eth_ipcp_mgmt_frame(const uint8_t * buf,
                                      msg->ssap,
 #endif
                                      buf + sizeof(*msg),
-                                     msg->qoscube);
+                                     qs);
                 }
                 break;
         case FLOW_REPLY:
@@ -785,7 +808,7 @@ static void * eth_ipcp_mgmt_handler(void * o)
         return (void *) 0;
 }
 
-static void * eth_ipcp_sdu_reader(void * o)
+static void * eth_ipcp_packet_reader(void * o)
 {
         uint8_t              br_addr[MAC_SIZE];
 #if defined(BUILD_ETH_DIX)
@@ -890,7 +913,9 @@ static void * eth_ipcp_sdu_reader(void * o)
                 if (deid == MGMT_EID) {
 #elif defined (BUILD_ETH_LLC)
                 if (length > 0x05FF) {/* DIX */
+#ifndef HAVE_NETMAP
                         ipcp_sdb_release(sdb);
+#endif
                         continue;
                 }
 
@@ -911,8 +936,8 @@ static void * eth_ipcp_sdu_reader(void * o)
 
                         memcpy(frame->buf, &e_frame->payload, length);
                         memcpy(frame->r_addr, e_frame->src_hwaddr, MAC_SIZE);
-                        pthread_mutex_unlock(&eth_data.mgmt_lock);
 
+                        pthread_mutex_lock(&eth_data.mgmt_lock);
                         list_add(&frame->next, &eth_data.mgmt_frames);
                         pthread_cond_signal(&eth_data.mgmt_cond);
                         pthread_mutex_unlock(&eth_data.mgmt_lock);
@@ -962,7 +987,12 @@ static void * eth_ipcp_sdu_reader(void * o)
         return (void *) 0;
 }
 
-static void * eth_ipcp_sdu_writer(void * o)
+static void cleanup_writer(void * o)
+{
+        fqueue_destroy((fqueue_t *) o);
+}
+
+static void * eth_ipcp_packet_writer(void * o)
 {
         int                  fd;
         struct shm_du_buff * sdb;
@@ -975,15 +1005,21 @@ static void * eth_ipcp_sdu_writer(void * o)
 #endif
         uint8_t              r_addr[MAC_SIZE];
 
+        fqueue_t *           fq;
+
+        fq = fqueue_create();
+        if (fq == NULL)
+                return (void *) -1;
+
         (void) o;
 
+        pthread_cleanup_push(cleanup_writer, fq);
+
         ipcp_lock_to_core();
 
         while (true) {
-                fevent(eth_data.np1_flows, eth_data.fq, NULL);
-
-                pthread_rwlock_rdlock(&eth_data.flows_lock);
-                while ((fd = fqueue_next(eth_data.fq)) >= 0) {
+                fevent(eth_data.np1_flows, fq, NULL);
+                while ((fd = fqueue_next(fq)) >= 0) {
                         if (ipcp_flow_read(fd, &sdb)) {
                                 log_dbg("Bad read from fd %d.", fd);
                                 continue;
@@ -996,6 +1032,8 @@ static void * eth_ipcp_sdu_writer(void * o)
                                 log_dbg("Failed to allocate header.");
                                 ipcp_sdb_release(sdb);
                         }
+
+                        pthread_rwlock_rdlock(&eth_data.flows_lock);
 #if defined(BUILD_ETH_DIX)
                         deid = eth_data.fd_to_ef[fd].r_eid;
 #elif defined(BUILD_ETH_LLC)
@@ -1006,6 +1044,8 @@ static void * eth_ipcp_sdu_writer(void * o)
                                eth_data.fd_to_ef[fd].r_addr,
                                MAC_SIZE);
 
+                        pthread_rwlock_unlock(&eth_data.flows_lock);
+
                         eth_ipcp_send_frame(r_addr,
 #if defined(BUILD_ETH_DIX)
                                             deid,
@@ -1016,9 +1056,10 @@ static void * eth_ipcp_sdu_writer(void * o)
                                             len);
                         ipcp_sdb_release(sdb);
                 }
-                pthread_rwlock_unlock(&eth_data.flows_lock);
         }
 
+        pthread_cleanup_pop(true);
+
         return (void *) 1;
 }
 
@@ -1129,7 +1170,7 @@ static void * eth_ipcp_if_monitor(void * o)
                         ifi = NLMSG_DATA(h);
 
                         /* Not our interface */
-                        if (ifi->ifi_index != eth_data.device.sll_ifindex)
+                        if (ifi->ifi_index != eth_data.if_idx)
                                 continue;
 
                         if (ifi->ifi_flags & IFF_UP) {
@@ -1189,6 +1230,10 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
 #ifndef SHM_RDRB_MULTI_BLOCK
         size_t           maxsz;
 #endif
+#if defined(HAVE_RAW_SOCKETS)
+        int              qdisc_bypass = 1;
+        int              flags;
+#endif
         assert(conf);
         assert(conf->type == THIS_TYPE);
 
@@ -1198,7 +1243,7 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
         }
 
         memset(&ifr, 0, sizeof(ifr));
-        memcpy(ifr.ifr_name, conf->dev, strlen(conf->dev));
+        memcpy(ifr.ifr_name, conf->dev, IFNAMSIZ);
 
 #ifdef BUILD_ETH_DIX
         if (conf->ethertype < 0x0600 || conf->ethertype == 0xFFFF) {
@@ -1274,9 +1319,9 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
         idx = if_nametoindex(conf->dev);
         if (idx == 0) {
                 log_err("Failed to retrieve interface index.");
-                close(skfd);
                 return -1;
         }
+        eth_data.if_idx = idx;
 #endif /* __FreeBSD__ */
 
 #if defined(HAVE_NETMAP)
@@ -1354,16 +1399,32 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
                 return -1;
         }
 
+        flags = fcntl(eth_data.s_fd, F_GETFL, 0);
+        if (flags < 0) {
+                log_err("Failed to get flags.");
+                goto fail_device;
+        }
+
+        if (fcntl(eth_data.s_fd, F_SETFL, flags | O_NONBLOCK)) {
+                log_err("Failed to set socket non-blocking.");
+                goto fail_device;
+        }
+
+        if (setsockopt(eth_data.s_fd, SOL_PACKET, PACKET_QDISC_BYPASS,
+                       &qdisc_bypass, sizeof(qdisc_bypass))) {
+                log_info("Qdisc bypass not supported.");
+        }
+
         if (bind(eth_data.s_fd, (struct sockaddr *) &eth_data.device,
                 sizeof(eth_data.device))) {
-                log_err("Failed to bind socket to interface");
+                log_err("Failed to bind socket to interface.");
                 goto fail_device;
         }
 
 #endif /* HAVE_NETMAP */
         ipcp_set_state(IPCP_OPERATIONAL);
 
-#ifdef __linux__
+#if defined(__linux__)
         if (pthread_create(&eth_data.if_monitor,
                            NULL,
                            eth_ipcp_if_monitor,
@@ -1381,20 +1442,24 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
                 goto fail_mgmt_handler;
         }
 
-        if (pthread_create(&eth_data.sdu_reader,
-                           NULL,
-                           eth_ipcp_sdu_reader,
-                           NULL)) {
-                ipcp_set_state(IPCP_INIT);
-                goto fail_sdu_reader;
+        for (idx = 0; idx < IPCP_ETH_RD_THR; ++idx) {
+                if (pthread_create(&eth_data.packet_reader[idx],
+                                   NULL,
+                                   eth_ipcp_packet_reader,
+                                   NULL)) {
+                        ipcp_set_state(IPCP_INIT);
+                        goto fail_packet_reader;
+                }
         }
 
-        if (pthread_create(&eth_data.sdu_writer,
-                           NULL,
-                           eth_ipcp_sdu_writer,
-                           NULL)) {
-                ipcp_set_state(IPCP_INIT);
-                goto fail_sdu_writer;
+        for (idx = 0; idx < IPCP_ETH_WR_THR; ++idx) {
+                if (pthread_create(&eth_data.packet_writer[idx],
+                                   NULL,
+                                   eth_ipcp_packet_writer,
+                                   NULL)) {
+                        ipcp_set_state(IPCP_INIT);
+                        goto fail_packet_writer;
+                }
         }
 
 #if defined(BUILD_ETH_DIX)
@@ -1407,10 +1472,17 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
 
         return 0;
 
- fail_sdu_writer:
-        pthread_cancel(eth_data.sdu_reader);
-        pthread_join(eth_data.sdu_reader, NULL);
- fail_sdu_reader:
+ fail_packet_writer:
+        while (idx > 0) {
+                pthread_cancel(eth_data.packet_writer[--idx]);
+                pthread_join(eth_data.packet_writer[idx], NULL);
+        }
+        idx = IPCP_ETH_RD_THR;
+ fail_packet_reader:
+        while (idx > 0) {
+                pthread_cancel(eth_data.packet_reader[--idx]);
+                pthread_join(eth_data.packet_reader[idx], NULL);
+        }
         pthread_cancel(eth_data.mgmt_handler);
         pthread_join(eth_data.mgmt_handler, NULL);
  fail_mgmt_handler:
@@ -1418,7 +1490,7 @@ static int eth_ipcp_bootstrap(const struct ipcp_config * conf)
         pthread_cancel(eth_data.if_monitor);
         pthread_join(eth_data.if_monitor, NULL);
 #endif
-#if !defined(HAVE_NETMAP)
+#if defined(__linux__) || !defined(HAVE_NETMAP)
  fail_device:
 #endif
 #if defined(HAVE_NETMAP)
@@ -1509,7 +1581,7 @@ static int eth_ipcp_query(const uint8_t * hash)
 
 static int eth_ipcp_flow_alloc(int             fd,
                                const uint8_t * hash,
-                               qoscube_t       cube)
+                               qosspec_t       qs)
 {
 #ifdef BUILD_ETH_LLC
         uint8_t  ssap = 0;
@@ -1521,11 +1593,6 @@ static int eth_ipcp_flow_alloc(int             fd,
 
         assert(hash);
 
-        if (cube > QOS_CUBE_DATA) {
-                log_dbg("Unsupported QoS requested.");
-                return -1;
-        }
-
         if (!shim_data_dir_has(eth_data.shim_data, hash)) {
                 log_err("Destination unreachable.");
                 return -1;
@@ -1553,7 +1620,7 @@ static int eth_ipcp_flow_alloc(int             fd,
 #elif defined(BUILD_ETH_LLC)
                            ssap,
 #endif
-                           hash, cube) < 0) {
+                           hash, qs) < 0) {
 #ifdef BUILD_ETH_LLC
                 pthread_rwlock_wrlock(&eth_data.flows_lock);
                 bmp_release(eth_data.saps, eth_data.fd_to_ef[fd].sap);
@@ -1696,6 +1763,8 @@ static struct ipcp_ops eth_ops = {
 int main(int    argc,
          char * argv[])
 {
+        int i;
+
         if (ipcp_init(argc, argv, &eth_ops) < 0)
                 goto fail_init;
 
@@ -1722,14 +1791,20 @@ int main(int    argc,
         ipcp_shutdown();
 
         if (ipcp_get_state() == IPCP_SHUTDOWN) {
-                pthread_cancel(eth_data.sdu_writer);
-                pthread_cancel(eth_data.sdu_reader);
+                for (i = 0; i < IPCP_ETH_WR_THR; ++i)
+                        pthread_cancel(eth_data.packet_writer[i]);
+                for (i = 0; i < IPCP_ETH_RD_THR; ++i)
+                        pthread_cancel(eth_data.packet_reader[i]);
+
                 pthread_cancel(eth_data.mgmt_handler);
 #ifdef __linux__
                 pthread_cancel(eth_data.if_monitor);
 #endif
-                pthread_join(eth_data.sdu_writer, NULL);
-                pthread_join(eth_data.sdu_reader, NULL);
+                for (i = 0; i < IPCP_ETH_WR_THR; ++i)
+                        pthread_join(eth_data.packet_writer[i], NULL);
+                for (i = 0; i < IPCP_ETH_RD_THR; ++i)
+                        pthread_join(eth_data.packet_reader[i], NULL);
+
                 pthread_join(eth_data.mgmt_handler, NULL);
 #ifdef __linux__
                 pthread_join(eth_data.if_monitor, NULL);
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 0b5ddf11..f8df5640 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -20,13 +20,24 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200112L
+#define __XSI_VISIBLE   500
+#endif
+
 #if defined(__linux__) && !defined(DISABLE_CORE_LOCK)
 #define _GNU_SOURCE
 #define NPROC (sysconf(_SC_NPROCESSORS_ONLN))
 #endif
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
 #define __XSI_VISIBLE   500
+#endif
 
 #include "config.h"
 
@@ -194,6 +205,7 @@ static void * mainloop(void * o)
                 layer_info_msg_t    layer_info = LAYER_INFO_MSG__INIT;
                 int                 fd         = -1;
                 struct cmd *        cmd;
+                qosspec_t           qs;
 
                 ret_msg.code = IPCP_MSG_CODE__IPCP_REPLY;
 
@@ -418,12 +430,13 @@ static void * mainloop(void * o)
                                 break;
                         }
 
+                        qs = msg_to_spec(msg->qosspec);
                         fd = np1_flow_alloc(msg->pid,
-                                            msg->port_id,
-                                            msg->qoscube);
+                                            msg->flow_id,
+                                            qs);
                         if (fd < 0) {
-                                log_err("Failed allocating fd on port_id %d.",
-                                        msg->port_id);
+                                log_err("Failed allocating fd on flow_id %d.",
+                                        msg->flow_id);
                                 ret_msg.result = -1;
                                 break;
                         }
@@ -431,7 +444,7 @@ static void * mainloop(void * o)
                         ret_msg.result =
                                 ipcpi.ops->ipcp_flow_alloc(fd,
                                                            msg->hash.data,
-                                                           msg->qoscube);
+                                                           qs);
                         break;
                 case IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP:
                         ret_msg.has_result = true;
@@ -448,10 +461,10 @@ static void * mainloop(void * o)
                         }
 
                         if (!msg->response) {
-                                fd = np1_flow_resp(msg->port_id);
+                                fd = np1_flow_resp(msg->flow_id);
                                 if (fd < 0) {
                                         log_warn("Port_id %d is not known.",
-                                                 msg->port_id);
+                                                 msg->flow_id);
                                         ret_msg.result = -1;
                                         break;
                                 }
@@ -475,10 +488,10 @@ static void * mainloop(void * o)
                                 break;
                         }
 
-                        fd = np1_flow_dealloc(msg->port_id);
+                        fd = np1_flow_dealloc(msg->flow_id);
                         if (fd < 0) {
-                                log_warn("Could not deallocate port_id %d.",
-                                        msg->port_id);
+                                log_warn("Could not deallocate flow_id %d.",
+                                        msg->flow_id);
                                 ret_msg.result = -1;
                                 break;
                         }
diff --git a/src/ipcpd/ipcp.h b/src/ipcpd/ipcp.h
index 5417fc74..1d25fb3f 100644
--- a/src/ipcpd/ipcp.h
+++ b/src/ipcpd/ipcp.h
@@ -26,7 +26,6 @@
 #include <ouroboros/hash.h>
 #include <ouroboros/ipcp.h>
 #include <ouroboros/list.h>
-#include <ouroboros/qoscube.h>
 #include <ouroboros/sockets.h>
 #include <ouroboros/tpm.h>
 
@@ -60,7 +59,7 @@ struct ipcp_ops {
 
         int   (* ipcp_flow_alloc)(int             fd,
                                   const uint8_t * dst,
-                                  qoscube_t       qos);
+                                  qosspec_t       qs);
 
         int   (* ipcp_flow_alloc_resp)(int fd,
                                        int response);
diff --git a/src/ipcpd/local/main.c b/src/ipcpd/local/main.c
index 358f6388..ab43f1f8 100644
--- a/src/ipcpd/local/main.c
+++ b/src/ipcpd/local/main.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -55,7 +59,7 @@ struct {
         fqueue_t *         fq;
 
         pthread_rwlock_t   lock;
-        pthread_t          sduloop;
+        pthread_t          packet_loop;
 } local_data;
 
 static int local_data_init(void)
@@ -93,7 +97,7 @@ static void local_data_fini(void){
         pthread_rwlock_destroy(&local_data.lock);
 }
 
-static void * ipcp_local_sdu_loop(void * o)
+static void * ipcp_local_packet_loop(void * o)
 {
         (void) o;
 
@@ -135,8 +139,8 @@ static int ipcp_local_bootstrap(const struct ipcp_config * conf)
 
         ipcp_set_state(IPCP_OPERATIONAL);
 
-        if (pthread_create(&local_data.sduloop, NULL,
-                           ipcp_local_sdu_loop, NULL)) {
+        if (pthread_create(&local_data.packet_loop, NULL,
+                           ipcp_local_packet_loop, NULL)) {
                 ipcp_set_state(IPCP_INIT);
                 return -1;
         }
@@ -179,7 +183,7 @@ static int ipcp_local_query(const uint8_t * hash)
 
 static int ipcp_local_flow_alloc(int             fd,
                                  const uint8_t * dst,
-                                 qoscube_t       cube)
+                                 qosspec_t       qs)
 {
         struct timespec ts     = {0, ALLOC_TIMEOUT * MILLION};
         struct timespec abstime;
@@ -208,7 +212,7 @@ static int ipcp_local_flow_alloc(int             fd,
 
         assert(ipcpi.alloc_id == -1);
 
-        out_fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), cube);
+        out_fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
         if (out_fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_dbg("Flow allocation failed: %d", out_fd);
@@ -360,8 +364,8 @@ int main(int    argc,
         ipcp_shutdown();
 
         if (ipcp_get_state() == IPCP_SHUTDOWN) {
-                pthread_cancel(local_data.sduloop);
-                pthread_join(local_data.sduloop, NULL);
+                pthread_cancel(local_data.packet_loop);
+                pthread_join(local_data.packet_loop, NULL);
         }
 
         local_data_fini();
diff --git a/src/ipcpd/normal/CMakeLists.txt b/src/ipcpd/normal/CMakeLists.txt
index 6dd68385..d1585395 100644
--- a/src/ipcpd/normal/CMakeLists.txt
+++ b/src/ipcpd/normal/CMakeLists.txt
@@ -37,13 +37,12 @@ set(SOURCE_FILES
   dht.c
   dir.c
   dt.c
-  dt_pci.c
   enroll.c
   fa.c
   main.c
   pff.c
   routing.c
-  sdu_sched.c
+  psched.c
   # Add policies last
   pol/alternate_pff.c
   pol/flat.c
diff --git a/src/ipcpd/normal/connmgr.c b/src/ipcpd/normal/connmgr.c
index bf07ebc4..7b71761f 100644
--- a/src/ipcpd/normal/connmgr.c
+++ b/src/ipcpd/normal/connmgr.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #define OUROBOROS_PREFIX "connection-manager"
 
diff --git a/src/ipcpd/normal/dht.c b/src/ipcpd/normal/dht.c
index a6f1928b..4064bf5c 100644
--- a/src/ipcpd/normal/dht.c
+++ b/src/ipcpd/normal/dht.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -58,21 +62,21 @@ typedef KadContactMsg kad_contact_msg_t;
 #define CLOCK_REALTIME_COARSE CLOCK_REALTIME
 #endif
 
-#define DHT_MAX_REQS  2048 /* KAD recommends rnd(), bmp can be changed.  */
-#define KAD_ALPHA     3    /* Parallel factor, proven optimal value.     */
-#define KAD_K         8    /* Replication factor, MDHT value.            */
-#define KAD_T_REPL    900  /* Replication time, tied to k. MDHT value.   */
-#define KAD_T_REFR    900  /* Refresh time stale bucket, MDHT value.     */
-#define KAD_T_JOIN    8    /* Response time to wait for a join.          */
-#define KAD_T_RESP    5    /* Response time to wait for a response.      */
-#define KAD_R_PING    2    /* Ping retries before declaring peer dead.   */
-#define KAD_QUEER     15   /* Time to declare peer questionable.         */
-#define KAD_BETA      8    /* Bucket split factor, must be 1, 2, 4 or 8. */
-#define KAD_RESP_RETR 6    /* Number of retries on sending a response.   */
-#define KAD_JOIN_RETR 8    /* Number of retries sending a join.          */
-#define KAD_JOIN_INTV 1    /* Time (seconds) between join retries.       */
-#define HANDLE_TIMEO  1000 /* Timeout for dht_handle_sdu tpm check (ms)  */
-#define DHT_RETR_ADDR 1    /* Number of addresses to return on retrieve  */
+#define DHT_MAX_REQS  2048 /* KAD recommends rnd(), bmp can be changed.    */
+#define KAD_ALPHA     3    /* Parallel factor, proven optimal value.       */
+#define KAD_K         8    /* Replication factor, MDHT value.              */
+#define KAD_T_REPL    900  /* Replication time, tied to k. MDHT value.     */
+#define KAD_T_REFR    900  /* Refresh time stale bucket, MDHT value.       */
+#define KAD_T_JOIN    8    /* Response time to wait for a join.            */
+#define KAD_T_RESP    5    /* Response time to wait for a response.        */
+#define KAD_R_PING    2    /* Ping retries before declaring peer dead.     */
+#define KAD_QUEER     15   /* Time to declare peer questionable.           */
+#define KAD_BETA      8    /* Bucket split factor, must be 1, 2, 4 or 8.   */
+#define KAD_RESP_RETR 6    /* Number of retries on sending a response.     */
+#define KAD_JOIN_RETR 8    /* Number of retries sending a join.            */
+#define KAD_JOIN_INTV 1    /* Time (seconds) between join retries.         */
+#define HANDLE_TIMEO  1000 /* Timeout for dht_handle_packet tpm check (ms) */
+#define DHT_RETR_ADDR 1    /* Number of addresses to return on retrieve    */
 
 enum dht_state {
         DHT_INIT = 0,
@@ -247,7 +251,7 @@ struct join_info {
         uint64_t     addr;
 };
 
-struct sdu_info {
+struct packet_info {
         struct dht *         dht;
         struct shm_du_buff * sdb;
 };
@@ -1485,7 +1489,7 @@ static int send_msg(struct dht * dht,
 
                 kad_msg__pack(msg, shm_du_buff_head(sdb));
 
-                if (dt_write_sdu(addr, QOS_CUBE_BE, dht->fd, sdb) == 0)
+                if (dt_write_packet(addr, QOS_CUBE_BE, dht->fd, sdb) == 0)
                         break;
 
                 ipcp_sdb_release(sdb);
@@ -2396,7 +2400,7 @@ uint64_t dht_query(struct dht *    dht,
         return 0;
 }
 
-static void * dht_handle_sdu(void * o)
+static void * dht_handle_packet(void * o)
 {
         struct dht * dht = (struct dht *) o;
 
@@ -2580,8 +2584,8 @@ static void * dht_handle_sdu(void * o)
         return (void *) 0;
 }
 
-static void dht_post_sdu(void *               comp,
-                         struct shm_du_buff * sdb)
+static void dht_post_packet(void *               comp,
+                            struct shm_du_buff * sdb)
 {
         struct cmd * cmd;
         struct dht * dht = (struct dht *) comp;
@@ -2796,19 +2800,19 @@ struct dht * dht_create(uint64_t addr)
         dht->addr = addr;
         dht->id   = NULL;
 #ifndef __DHT_TEST__
-        dht->tpm = tpm_create(2, 1, dht_handle_sdu, dht);
+        dht->tpm = tpm_create(2, 1, dht_handle_packet, dht);
         if (dht->tpm == NULL)
                 goto fail_tpm_create;
 
         if (tpm_start(dht->tpm))
                 goto fail_tpm_start;
 
-        dht->fd   = dt_reg_comp(dht, &dht_post_sdu, DHT);
+        dht->fd   = dt_reg_comp(dht, &dht_post_packet, DHT);
         notifier_reg(handle_event, dht);
 #else
         (void) handle_event;
-        (void) dht_handle_sdu;
-        (void) dht_post_sdu;
+        (void) dht_handle_packet;
+        (void) dht_post_packet;
 #endif
         dht->state = DHT_INIT;
 
diff --git a/src/ipcpd/normal/dir.c b/src/ipcpd/normal/dir.c
index 345d220d..a195f016 100644
--- a/src/ipcpd/normal/dir.c
+++ b/src/ipcpd/normal/dir.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #define OUROBOROS_PREFIX "directory"
 
diff --git a/src/ipcpd/normal/dt.c b/src/ipcpd/normal/dt.c
index b9d8934e..dc7343f1 100644
--- a/src/ipcpd/normal/dt.c
+++ b/src/ipcpd/normal/dt.c
@@ -20,15 +20,17 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
 #define DT               "dt"
 #define OUROBOROS_PREFIX DT
 
-/* FIXME: fix #defines and remove endian.h include. */
-#include <ouroboros/endian.h>
 #include <ouroboros/bitmap.h>
 #include <ouroboros/errno.h>
 #include <ouroboros/logs.h>
@@ -42,10 +44,9 @@
 #include "connmgr.h"
 #include "ipcp.h"
 #include "dt.h"
-#include "dt_pci.h"
 #include "pff.h"
 #include "routing.h"
-#include "sdu_sched.h"
+#include "psched.h"
 #include "comp.h"
 #include "fa.h"
 
@@ -64,13 +65,96 @@
 #endif
 
 struct comp_info {
-        void   (* post_sdu)(void * comp, struct shm_du_buff * sdb);
+        void (* post_packet)(void * comp, struct shm_du_buff * sdb);
         void * comp;
         char * name;
 };
 
+/* Abstract syntax */
+enum dtp_fields {
+        DTP_DST = 0,   /* DST ADDRESS      */
+        DTP_QOS,       /* QOS ID           */
+        DTP_DEID,      /* DST Endpoint ID  */
+        DTP_TTL,       /* TTL FIELD        */
+        DTP_NUM_FIELDS /* Number of fields */
+};
+
+/* Fixed field lengths */
+#define TTL_LEN 1
+#define QOS_LEN 1
+
+struct dt_pci {
+        uint64_t  dst_addr;
+        qoscube_t qc;
+        uint8_t   ttl;
+        uint32_t  eid;
+};
+
+struct {
+        uint8_t         addr_size;
+        uint8_t         eid_size;
+        size_t          head_size;
+
+        /* Offsets */
+        size_t          qc_o;
+        size_t          ttl_o;
+        size_t          eid_o;
+
+        /* Initial TTL value */
+        uint8_t         max_ttl;
+} dt_pci_info;
+
+static int dt_pci_ser(struct shm_du_buff * sdb,
+                      struct dt_pci *      dt_pci)
+{
+        uint8_t * head;
+        uint8_t   ttl = dt_pci_info.max_ttl;
+
+        assert(sdb);
+        assert(dt_pci);
+
+        head = shm_du_buff_head_alloc(sdb, dt_pci_info.head_size);
+        if (head == NULL)
+                return -EPERM;
+
+        /* FIXME: Add check and operations for Big Endian machines. */
+        memcpy(head, &dt_pci->dst_addr, dt_pci_info.addr_size);
+        memcpy(head + dt_pci_info.qc_o, &dt_pci->qc, QOS_LEN);
+        memcpy(head + dt_pci_info.ttl_o, &ttl, TTL_LEN);
+        memcpy(head + dt_pci_info.eid_o, &dt_pci->eid, dt_pci_info.eid_size);
+
+        return 0;
+}
+
+static void dt_pci_des(struct shm_du_buff * sdb,
+                       struct dt_pci *      dt_pci)
+{
+        uint8_t * head;
+
+        assert(sdb);
+        assert(dt_pci);
+
+        head = shm_du_buff_head(sdb);
+
+        /* Decrease TTL */
+        --*(head + dt_pci_info.ttl_o);
+
+        /* FIXME: Add check and operations for Big Endian machines. */
+        memcpy(&dt_pci->dst_addr, head, dt_pci_info.addr_size);
+        memcpy(&dt_pci->qc, head + dt_pci_info.qc_o, QOS_LEN);
+        memcpy(&dt_pci->ttl, head + dt_pci_info.ttl_o, TTL_LEN);
+        memcpy(&dt_pci->eid, head + dt_pci_info.eid_o, dt_pci_info.eid_size);
+}
+
+static void dt_pci_shrink(struct shm_du_buff * sdb)
+{
+        assert(sdb);
+
+        shm_du_buff_head_release(sdb, dt_pci_info.head_size);
+}
+
 struct {
-        struct sdu_sched * sdu_sched;
+        struct psched *    psched;
 
         struct pff *       pff[QOS_CUBE_MAX];
         struct routing_i * routing[QOS_CUBE_MAX];
@@ -337,24 +421,25 @@ static void handle_event(void *       self,
 #ifdef IPCP_FLOW_STATS
                 stat_used(c->flow_info.fd, c->conn_info.addr);
 #endif
-                sdu_sched_add(dt.sdu_sched, c->flow_info.fd);
-                log_dbg("Added fd %d to SDU scheduler.", c->flow_info.fd);
+                psched_add(dt.psched, c->flow_info.fd);
+                log_dbg("Added fd %d to packet scheduler.", c->flow_info.fd);
                 break;
         case NOTIFY_DT_CONN_DEL:
 #ifdef IPCP_FLOW_STATS
                 stat_used(c->flow_info.fd, INVALID_ADDR);
 #endif
-                sdu_sched_del(dt.sdu_sched, c->flow_info.fd);
-                log_dbg("Removed fd %d from SDU scheduler.", c->flow_info.fd);
+                psched_del(dt.psched, c->flow_info.fd);
+                log_dbg("Removed fd %d from "
+                        "packet scheduler.", c->flow_info.fd);
                 break;
         default:
                 break;
         }
 }
 
-static void sdu_handler(int                  fd,
-                        qoscube_t            qc,
-                        struct shm_du_buff * sdb)
+static void packet_handler(int                  fd,
+                           qoscube_t            qc,
+                           struct shm_du_buff * sdb)
 {
         struct dt_pci dt_pci;
         int           ret;
@@ -407,7 +492,7 @@ static void sdu_handler(int                  fd,
 
                 ret = ipcp_flow_write(ofd, sdb);
                 if (ret < 0) {
-                        log_dbg("Failed to write SDU to fd %d.", ofd);
+                        log_dbg("Failed to write packet to fd %d.", ofd);
                         if (ret == -EFLOWDOWN)
                                 notifier_event(NOTIFY_DT_FLOW_DOWN, &ofd);
                         ipcp_sdb_release(sdb);
@@ -476,7 +561,7 @@ static void sdu_handler(int                  fd,
                         return;
                 }
 
-                if (dt.comps[dt_pci.eid].post_sdu == NULL) {
+                if (dt.comps[dt_pci.eid].post_packet == NULL) {
                         log_err("No registered component on eid %d.",
                                 dt_pci.eid);
                         ipcp_sdb_release(sdb);
@@ -512,7 +597,8 @@ static void sdu_handler(int                  fd,
 
                 pthread_mutex_unlock(&dt.stat[dt_pci.eid].lock);
 #endif
-                dt.comps[dt_pci.eid].post_sdu(dt.comps[dt_pci.eid].comp, sdb);
+                dt.comps[dt_pci.eid].post_packet(dt.comps[dt_pci.eid].comp,
+                                                 sdb);
         }
 }
 
@@ -555,10 +641,14 @@ int dt_init(enum pol_routing pr,
         info.pref_syntax  = PROTO_FIXED;
         info.addr         = ipcpi.dt_addr;
 
-        if (dt_pci_init(addr_size, eid_size, max_ttl)) {
-                log_err("Failed to init shm dt_pci.");
-                goto fail_pci_init;
-        }
+        dt_pci_info.addr_size = addr_size;
+        dt_pci_info.eid_size  = eid_size;
+        dt_pci_info.max_ttl   = max_ttl;
+
+        dt_pci_info.qc_o      = dt_pci_info.addr_size;
+        dt_pci_info.ttl_o     = dt_pci_info.qc_o + QOS_LEN;
+        dt_pci_info.eid_o     = dt_pci_info.ttl_o + TTL_LEN;
+        dt_pci_info.head_size = dt_pci_info.eid_o + dt_pci_info.eid_size;
 
         if (notifier_reg(handle_event, NULL)) {
                 log_err("Failed to register with notifier.");
@@ -642,8 +732,6 @@ int dt_init(enum pol_routing pr,
  fail_connmgr_comp_init:
         notifier_unreg(&handle_event);
  fail_notifier_reg:
-        dt_pci_fini();
- fail_pci_init:
         return -1;
 }
 
@@ -671,21 +759,19 @@ void dt_fini(void)
         connmgr_comp_fini(COMPID_DT);
 
         notifier_unreg(&handle_event);
-
-        dt_pci_fini();
 }
 
 int dt_start(void)
 {
-        dt.sdu_sched = sdu_sched_create(sdu_handler);
-        if (dt.sdu_sched == NULL) {
-                log_err("Failed to create N-1 SDU scheduler.");
+        dt.psched = psched_create(packet_handler);
+        if (dt.psched == NULL) {
+                log_err("Failed to create N-1 packet scheduler.");
                 return -1;
         }
 
         if (pthread_create(&dt.listener, NULL, dt_conn_handle, NULL)) {
                 log_err("Failed to create listener thread.");
-                sdu_sched_destroy(dt.sdu_sched);
+                psched_destroy(dt.psched);
                 return -1;
         }
 
@@ -696,7 +782,7 @@ void dt_stop(void)
 {
         pthread_cancel(dt.listener);
         pthread_join(dt.listener, NULL);
-        sdu_sched_destroy(dt.sdu_sched);
+        psched_destroy(dt.psched);
 }
 
 int dt_reg_comp(void * comp,
@@ -716,11 +802,11 @@ int dt_reg_comp(void * comp,
                 return -EBADF;
         }
 
-        assert(dt.comps[res_fd].post_sdu == NULL);
+        assert(dt.comps[res_fd].post_packet == NULL);
         assert(dt.comps[res_fd].comp == NULL);
         assert(dt.comps[res_fd].name == NULL);
 
-        dt.comps[res_fd].post_sdu = func;
+        dt.comps[res_fd].post_packet = func;
         dt.comps[res_fd].comp     = comp;
         dt.comps[res_fd].name     = name;
 
@@ -731,10 +817,10 @@ int dt_reg_comp(void * comp,
         return res_fd;
 }
 
-int dt_write_sdu(uint64_t             dst_addr,
-                 qoscube_t            qc,
-                 int                  np1_fd,
-                 struct shm_du_buff * sdb)
+int dt_write_packet(uint64_t             dst_addr,
+                    qoscube_t            qc,
+                    int                  np1_fd,
+                    struct shm_du_buff * sdb)
 {
         int           fd;
         struct dt_pci dt_pci;
@@ -779,7 +865,7 @@ int dt_write_sdu(uint64_t             dst_addr,
 #endif
         ret = ipcp_flow_write(fd, sdb);
         if (ret < 0) {
-                log_dbg("Failed to write SDU to fd %d.", fd);
+                log_dbg("Failed to write packet to fd %d.", fd);
                 if (ret == -EFLOWDOWN)
                         notifier_event(NOTIFY_DT_FLOW_DOWN, &fd);
                 goto fail_write;
diff --git a/src/ipcpd/normal/dt.h b/src/ipcpd/normal/dt.h
index e0bbe3f3..b74e84b0 100644
--- a/src/ipcpd/normal/dt.h
+++ b/src/ipcpd/normal/dt.h
@@ -24,10 +24,9 @@
 #define OUROBOROS_IPCPD_NORMAL_DT_H
 
 #include <ouroboros/ipcp.h>
+#include <ouroboros/qoscube.h>
 #include <ouroboros/shm_rdrbuff.h>
 
-#include "dt_pci.h"
-
 #define DT_COMP      "Data Transfer"
 #define DT_PROTO     "dtp"
 #define INVALID_ADDR 0
@@ -49,9 +48,9 @@ int  dt_reg_comp(void * comp,
                  void (* func)(void * comp, struct shm_du_buff * sdb),
                  char * name);
 
-int  dt_write_sdu(uint64_t             dst_addr,
-                  qoscube_t            qc,
-                  int                  res_fd,
-                  struct shm_du_buff * sdb);
+int  dt_write_packet(uint64_t             dst_addr,
+                     qoscube_t            qc,
+                     int                  res_fd,
+                     struct shm_du_buff * sdb);
 
 #endif /* OUROBOROS_IPCPD_NORMAL_DT_H */
diff --git a/src/ipcpd/normal/dt_const.h b/src/ipcpd/normal/dt_const.h
deleted file mode 100644
index fb005f06..00000000
--- a/src/ipcpd/normal/dt_const.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2018
- *
- * Data Transfer Constants for the IPCP
- *
- *    Dimitri Staessens <[email protected]>
- *    Sander Vrijders   <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#ifndef OUROBOROS_IPCPD_NORMAL_DT_CONST_H
-#define OUROBOROS_IPCPD_NORMAL_DT_CONST_H
-
-#include <stdint.h>
-#include <stdbool.h>
-
-struct dt_const {
-        uint8_t  addr_size;
-        uint8_t  cep_id_size;
-        uint8_t  seqno_size;
-        bool     has_ttl;
-        bool     has_chk;
-        uint32_t min_pdu_size;
-        uint32_t max_pdu_size;
-};
-
-#endif /* OUROBOROS_IPCPD_NORMAL_DT_CONST_H */
diff --git a/src/ipcpd/normal/dt_pci.c b/src/ipcpd/normal/dt_pci.c
deleted file mode 100644
index 76304668..00000000
--- a/src/ipcpd/normal/dt_pci.c
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2018
- *
- * Protocol Control Information of Data Transfer Component
- *
- *    Dimitri Staessens <[email protected]>
- *    Sander Vrijders   <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#include <ouroboros/errno.h>
-
-#include "dt_pci.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-
-struct {
-        uint8_t         addr_size;
-        uint8_t         eid_size;
-        size_t          head_size;
-
-        /* Offsets */
-        size_t          qc_o;
-        size_t          ttl_o;
-        size_t          eid_o;
-
-        /* Initial TTL value */
-        uint8_t         max_ttl;
-} dt_pci_info;
-
-int dt_pci_init(uint8_t addr_size,
-                uint8_t eid_size,
-                uint8_t max_ttl)
-{
-        dt_pci_info.addr_size = addr_size;
-        dt_pci_info.eid_size  = eid_size;
-        dt_pci_info.max_ttl   = max_ttl;
-
-        dt_pci_info.qc_o      = dt_pci_info.addr_size;
-        dt_pci_info.ttl_o     = dt_pci_info.qc_o + QOS_LEN;
-        dt_pci_info.eid_o     = dt_pci_info.ttl_o + TTL_LEN;
-        dt_pci_info.head_size = dt_pci_info.eid_o + dt_pci_info.eid_size;
-
-        return 0;
-}
-
-void dt_pci_fini(void) {
-        return;
-}
-
-int dt_pci_ser(struct shm_du_buff * sdb,
-               struct dt_pci *      dt_pci)
-{
-        uint8_t * head;
-        uint8_t   ttl = dt_pci_info.max_ttl;
-
-        assert(sdb);
-        assert(dt_pci);
-
-        head = shm_du_buff_head_alloc(sdb, dt_pci_info.head_size);
-        if (head == NULL)
-                return -EPERM;
-
-        /* FIXME: Add check and operations for Big Endian machines. */
-        memcpy(head, &dt_pci->dst_addr, dt_pci_info.addr_size);
-        memcpy(head + dt_pci_info.qc_o, &dt_pci->qc, QOS_LEN);
-        memcpy(head + dt_pci_info.ttl_o, &ttl, TTL_LEN);
-        memcpy(head + dt_pci_info.eid_o, &dt_pci->eid, dt_pci_info.eid_size);
-
-        return 0;
-}
-
-void dt_pci_des(struct shm_du_buff * sdb,
-                struct dt_pci *      dt_pci)
-{
-        uint8_t * head;
-
-        assert(sdb);
-        assert(dt_pci);
-
-        head = shm_du_buff_head(sdb);
-
-        /* Decrease TTL */
-        --*(head + dt_pci_info.ttl_o);
-
-        /* FIXME: Add check and operations for Big Endian machines. */
-        memcpy(&dt_pci->dst_addr, head, dt_pci_info.addr_size);
-        memcpy(&dt_pci->qc, head + dt_pci_info.qc_o, QOS_LEN);
-        memcpy(&dt_pci->ttl, head + dt_pci_info.ttl_o, TTL_LEN);
-        memcpy(&dt_pci->eid, head + dt_pci_info.eid_o, dt_pci_info.eid_size);
-}
-
-void dt_pci_shrink(struct shm_du_buff * sdb)
-{
-        assert(sdb);
-
-        shm_du_buff_head_release(sdb, dt_pci_info.head_size);
-}
diff --git a/src/ipcpd/normal/dt_pci.h b/src/ipcpd/normal/dt_pci.h
deleted file mode 100644
index 8022f84a..00000000
--- a/src/ipcpd/normal/dt_pci.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016 - 2018
- *
- * Protocol Control Information of Data Transfer Component
- *
- *    Dimitri Staessens <[email protected]>
- *    Sander Vrijders   <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., http://www.fsf.org/about/contact/.
- */
-
-#ifndef OUROBOROS_IPCPD_NORMAL_DT_PCI_H
-#define OUROBOROS_IPCPD_NORMAL_DT_PCI_H
-
-#include <ouroboros/shm_du_buff.h>
-#include <ouroboros/proto.h>
-#include <ouroboros/qoscube.h>
-
-#include <stdint.h>
-#include <stdbool.h>
-
-/* Abstract syntax */
-enum dtp_fields {
-        DTP_DST = 0,   /* DST ADDRESS      */
-        DTP_QOS,       /* QOS ID           */
-        DTP_DEID,      /* DST Endpoint ID  */
-        DTP_TTL,       /* TTL FIELD        */
-        DTP_NUM_FIELDS /* Number of fields */
-};
-
-/* Fixed field lengths */
-#define TTL_LEN 1
-#define QOS_LEN 1
-
-struct dt_pci {
-        uint64_t  dst_addr;
-        qoscube_t qc;
-        uint8_t   ttl;
-        uint32_t  eid;
-};
-
-int   dt_pci_init(uint8_t addr_size,
-                  uint8_t eid_size,
-                  uint8_t max_ttl);
-
-void  dt_pci_fini(void);
-
-int   dt_pci_ser(struct shm_du_buff * sdb,
-                 struct dt_pci *      dt_pci);
-
-void  dt_pci_des(struct shm_du_buff * sdb,
-                 struct dt_pci *      dt_pci);
-
-void  dt_pci_shrink(struct shm_du_buff * sdb);
-
-#endif /* OUROBOROS_IPCPD_NORMAL_DT_PCI_H */
diff --git a/src/ipcpd/normal/enroll.c b/src/ipcpd/normal/enroll.c
index a321db2b..78305ff0 100644
--- a/src/ipcpd/normal/enroll.c
+++ b/src/ipcpd/normal/enroll.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 199309L
+#endif
 
 #define OUROBOROS_PREFIX "enrollment"
 
diff --git a/src/ipcpd/normal/fa.c b/src/ipcpd/normal/fa.c
index 067a6e73..027223b7 100644
--- a/src/ipcpd/normal/fa.c
+++ b/src/ipcpd/normal/fa.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -34,9 +38,8 @@
 #include <ouroboros/ipcp-dev.h>
 
 #include "dir.h"
-#include "dt_pci.h"
 #include "fa.h"
-#include "sdu_sched.h"
+#include "psched.h"
 #include "ipcp.h"
 #include "dt.h"
 
@@ -54,8 +57,15 @@ struct fa_msg {
         uint32_t r_eid;
         uint32_t s_eid;
         uint8_t  code;
-        uint8_t  qc;
         int8_t   response;
+        /* QoS parameters from spec, aligned */
+        uint8_t  availability;
+        uint8_t  in_order;
+        uint32_t delay;
+        uint64_t bandwidth;
+        uint32_t loss;
+        uint32_t ber;
+        uint32_t max_gap;
 } __attribute__((packed));
 
 struct {
@@ -64,19 +74,19 @@ struct {
         uint64_t           r_addr[PROG_MAX_FLOWS];
         int                fd;
 
-        struct sdu_sched * sdu_sched;
+        struct psched *    psched;
 } fa;
 
-static void sdu_handler(int                  fd,
-                        qoscube_t            qc,
-                        struct shm_du_buff * sdb)
+static void packet_handler(int                  fd,
+                           qoscube_t            qc,
+                           struct shm_du_buff * sdb)
 {
         pthread_rwlock_rdlock(&fa.flows_lock);
 
-        if (dt_write_sdu(fa.r_addr[fd], qc, fa.r_eid[fd], sdb)) {
+        if (dt_write_packet(fa.r_addr[fd], qc, fa.r_eid[fd], sdb)) {
                 pthread_rwlock_unlock(&fa.flows_lock);
                 ipcp_sdb_release(sdb);
-                log_warn("Failed to forward SDU.");
+                log_warn("Failed to forward packet.");
                 return;
         }
 
@@ -89,7 +99,7 @@ static void destroy_conn(int fd)
         fa.r_addr[fd] = INVALID_ADDR;
 }
 
-static void fa_post_sdu(void *               comp,
+static void fa_post_packet(void *               comp,
                         struct shm_du_buff * sdb)
 {
         struct timespec ts  = {0, TIMEOUT * 1000};
@@ -97,6 +107,7 @@ static void fa_post_sdu(void *               comp,
         int             fd;
         uint8_t *       buf;
         struct fa_msg * msg;
+        qosspec_t       qs;
 
         (void) comp;
 
@@ -139,10 +150,18 @@ static void fa_post_sdu(void *               comp,
 
                 assert(ipcpi.alloc_id == -1);
 
+                qs.delay        = ntoh32(msg->delay);
+                qs.bandwidth    = ntoh64(msg->bandwidth);
+                qs.availability = msg->availability;
+                qs.loss         = ntoh32(msg->loss);
+                qs.ber          = ntoh32(msg->ber);
+                qs.in_order     = msg->in_order;
+                qs.max_gap      = ntoh32(msg->max_gap);
+
                 fd = ipcp_flow_req_arr(getpid(),
                                        (uint8_t *) (msg + 1),
                                        ipcp_dir_hash_len(),
-                                       msg->qc);
+                                       qs);
                 if (fd < 0) {
                         pthread_mutex_unlock(&ipcpi.alloc_lock);
                         log_err("Failed to get fd for flow.");
@@ -152,8 +171,8 @@ static void fa_post_sdu(void *               comp,
 
                 pthread_rwlock_wrlock(&fa.flows_lock);
 
-                fa.r_eid[fd]  = msg->s_eid;
-                fa.r_addr[fd] = msg->s_addr;
+                fa.r_eid[fd]  = ntoh32(msg->s_eid);
+                fa.r_addr[fd] = ntoh64(msg->s_addr);
 
                 pthread_rwlock_unlock(&fa.flows_lock);
 
@@ -166,14 +185,14 @@ static void fa_post_sdu(void *               comp,
         case FLOW_REPLY:
                 pthread_rwlock_wrlock(&fa.flows_lock);
 
-                fa.r_eid[msg->r_eid] = msg->s_eid;
+                fa.r_eid[ntoh32(msg->r_eid)] = ntoh32(msg->s_eid);
 
-                ipcp_flow_alloc_reply(msg->r_eid, msg->response);
+                ipcp_flow_alloc_reply(ntoh32(msg->r_eid), msg->response);
 
                 if (msg->response < 0)
-                        destroy_conn(msg->r_eid);
+                        destroy_conn(ntoh32(msg->r_eid));
                 else
-                        sdu_sched_add(fa.sdu_sched, msg->r_eid);
+                        psched_add(fa.psched, ntoh32(msg->r_eid));
 
                 pthread_rwlock_unlock(&fa.flows_lock);
 
@@ -196,7 +215,7 @@ int fa_init(void)
         if (pthread_rwlock_init(&fa.flows_lock, NULL))
                 return -1;
 
-        fa.fd = dt_reg_comp(&fa, &fa_post_sdu, FA);
+        fa.fd = dt_reg_comp(&fa, &fa_post_packet, FA);
 
         return 0;
 }
@@ -208,9 +227,9 @@ void fa_fini(void)
 
 int fa_start(void)
 {
-        fa.sdu_sched = sdu_sched_create(sdu_handler);
-        if (fa.sdu_sched == NULL) {
-                log_err("Failed to create SDU scheduler.");
+        fa.psched = psched_create(packet_handler);
+        if (fa.psched == NULL) {
+                log_err("Failed to create packet scheduler.");
                 return -1;
         }
 
@@ -219,16 +238,17 @@ int fa_start(void)
 
 void fa_stop(void)
 {
-        sdu_sched_destroy(fa.sdu_sched);
+        psched_destroy(fa.psched);
 }
 
 int fa_alloc(int             fd,
              const uint8_t * dst,
-             qoscube_t       qc)
+             qosspec_t       qs)
 {
         struct fa_msg *      msg;
         uint64_t             addr;
         struct shm_du_buff * sdb;
+        qoscube_t            qc;
 
         addr = dir_query(dst);
         if (addr == 0)
@@ -237,15 +257,23 @@ int fa_alloc(int             fd,
         if (ipcp_sdb_reserve(&sdb, sizeof(*msg) + ipcp_dir_hash_len()))
                 return -1;
 
-        msg         = (struct fa_msg *) shm_du_buff_head(sdb);
-        msg->code   = FLOW_REQ;
-        msg->qc     = qc;
-        msg->s_eid  = fd;
-        msg->s_addr = ipcpi.dt_addr;
+        msg               = (struct fa_msg *) shm_du_buff_head(sdb);
+        msg->code         = FLOW_REQ;
+        msg->s_eid        = hton32(fd);
+        msg->s_addr       = hton64(ipcpi.dt_addr);
+        msg->delay        = hton32(qs.delay);
+        msg->bandwidth    = hton64(qs.bandwidth);
+        msg->availability = qs.availability;
+        msg->loss         = hton32(qs.loss);
+        msg->ber          = hton32(qs.ber);
+        msg->in_order     = qs.in_order;
+        msg->max_gap      = hton32(qs.max_gap);
 
         memcpy(msg + 1, dst, ipcp_dir_hash_len());
 
-        if (dt_write_sdu(addr, qc, fa.fd, sdb)) {
+        qc = qos_spec_to_cube(qs);
+
+        if (dt_write_packet(addr, qc, fa.fd, sdb)) {
                 ipcp_sdb_release(sdb);
                 return -1;
         }
@@ -299,22 +327,22 @@ int fa_alloc_resp(int fd,
 
         msg           = (struct fa_msg *) shm_du_buff_head(sdb);
         msg->code     = FLOW_REPLY;
-        msg->r_eid    = fa.r_eid[fd];
-        msg->s_eid    = fd;
+        msg->r_eid    = hton32(fa.r_eid[fd]);
+        msg->s_eid    = hton32(fd);
         msg->response = response;
 
         if (response < 0) {
                 destroy_conn(fd);
                 ipcp_sdb_release(sdb);
         } else {
-                sdu_sched_add(fa.sdu_sched, fd);
+                psched_add(fa.psched, fd);
         }
 
         ipcp_flow_get_qoscube(fd, &qc);
 
         assert(qc >= 0 && qc < QOS_CUBE_MAX);
 
-        if (dt_write_sdu(fa.r_addr[fd], qc, fa.fd, sdb)) {
+        if (dt_write_packet(fa.r_addr[fd], qc, fa.fd, sdb)) {
                 destroy_conn(fd);
                 pthread_rwlock_unlock(&fa.flows_lock);
                 ipcp_sdb_release(sdb);
@@ -332,7 +360,7 @@ int fa_dealloc(int fd)
 
         pthread_rwlock_wrlock(&fa.flows_lock);
 
-        sdu_sched_del(fa.sdu_sched, fd);
+        psched_del(fa.psched, fd);
 
         destroy_conn(fd);
 
diff --git a/src/ipcpd/normal/fa.h b/src/ipcpd/normal/fa.h
index 87819d6f..6a836e17 100644
--- a/src/ipcpd/normal/fa.h
+++ b/src/ipcpd/normal/fa.h
@@ -23,7 +23,7 @@
 #ifndef OUROBOROS_IPCPD_NORMAL_FA_H
 #define OUROBOROS_IPCPD_NORMAL_FA_H
 
-#include <ouroboros/qoscube.h>
+#include <ouroboros/qos.h>
 #include <ouroboros/utils.h>
 
 int  fa_init(void);
@@ -36,7 +36,7 @@ void fa_stop(void);
 
 int  fa_alloc(int             fd,
               const uint8_t * dst,
-              qoscube_t       qos);
+              qosspec_t       qs);
 
 int  fa_alloc_resp(int fd,
                    int response);
diff --git a/src/ipcpd/normal/main.c b/src/ipcpd/normal/main.c
index b131bbb6..3f05f421 100644
--- a/src/ipcpd/normal/main.c
+++ b/src/ipcpd/normal/main.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200809L
+#endif
 
 #include "config.h"
 
diff --git a/src/ipcpd/normal/pol/flat.c b/src/ipcpd/normal/pol/flat.c
index cab74159..89b7fff6 100644
--- a/src/ipcpd/normal/pol/flat.c
+++ b/src/ipcpd/normal/pol/flat.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #define OUROBOROS_PREFIX "flat-addr-auth"
 
diff --git a/src/ipcpd/normal/pol/graph.c b/src/ipcpd/normal/pol/graph.c
index f3c053ab..ec0917c5 100644
--- a/src/ipcpd/normal/pol/graph.c
+++ b/src/ipcpd/normal/pol/graph.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #define OUROBOROS_PREFIX "graph"
 
@@ -547,27 +551,6 @@ static int graph_routing_table_simple(struct graph *     graph,
         return -1;
 }
 
-int graph_routing_table(struct graph *     graph,
-                        uint64_t           s_addr,
-                        struct list_head * table)
-{
-        int   ret = 0;
-        int * dist;
-
-        assert(graph);
-        assert(table);
-
-        pthread_mutex_lock(&graph->lock);
-
-        ret = graph_routing_table_simple(graph, s_addr, table, &dist);
-
-        free(dist);
-
-        pthread_mutex_unlock(&graph->lock);
-
-        return ret;
-}
-
 static int add_lfa_to_table(struct list_head * table,
                             uint64_t           addr,
                             uint64_t           lfa)
@@ -595,9 +578,10 @@ static int add_lfa_to_table(struct list_head * table,
         return -1;
 }
 
-int graph_routing_table_lfa(struct graph *     graph,
-                            uint64_t           s_addr,
-                            struct list_head * table)
+int graph_routing_table(struct graph *     graph,
+                        enum routing_algo  algo,
+                        uint64_t           s_addr,
+                        struct list_head * table)
 {
         int *              s_dist;
         int *              n_dist[PROG_MAX_FLOWS];
@@ -617,66 +601,82 @@ int graph_routing_table_lfa(struct graph *     graph,
 
         pthread_mutex_lock(&graph->lock);
 
-        for (j = 0; j < PROG_MAX_FLOWS; j++) {
-                n_dist[j] = NULL;
-                n_index[j] = -1;
-                addrs[j] = -1;
-        }
-
         /* Get the normal next hops routing table. */
         if (graph_routing_table_simple(graph, s_addr, table, &s_dist))
                 goto fail_table_simple;
 
-        list_for_each(p, &graph->vertices) {
-                v = list_entry(p, struct vertex, next);
+        /* Possibly augment the routing table. */
+        switch (algo) {
+        case ROUTING_SIMPLE:
+                break;
+        case ROUTING_LFA:
+                for (j = 0; j < PROG_MAX_FLOWS; j++) {
+                        n_dist[j] = NULL;
+                        n_index[j] = -1;
+                        addrs[j] = -1;
+                }
 
-                if (v->addr != s_addr)
-                        continue;
+                list_for_each(p, &graph->vertices) {
+                        v = list_entry(p, struct vertex, next);
 
-                /* Get the distances for every neighbor of the source. */
-                list_for_each(q, &v->edges) {
-                        e = list_entry(q, struct edge, next);
+                        if (v->addr != s_addr)
+                                continue;
 
-                        addrs[i] = e->nb->addr;
-                        n_index[i] = e->nb->index;
-                        if (dijkstra(graph, e->nb->addr,
-                                     &nhops, &(n_dist[i++])))
-                                goto fail_dijkstra;
+                        /*
+                         * Get the distances for every neighbor
+                         * of the source.
+                         */
+                        list_for_each(q, &v->edges) {
+                                e = list_entry(q, struct edge, next);
 
-                        free(nhops);
-                }
+                                addrs[i] = e->nb->addr;
+                                n_index[i] = e->nb->index;
+                                if (dijkstra(graph, e->nb->addr,
+                                             &nhops, &(n_dist[i++])))
+                                        goto fail_dijkstra;
 
-                break;
-        }
+                                free(nhops);
+                        }
 
-        /* Loop though all nodes to see if we have a LFA for them. */
-        list_for_each(p, &graph->vertices) {
-                v = list_entry(p, struct vertex, next);
+                        break;
+                }
 
-                if (v->addr == s_addr)
-                        continue;
+                /* Loop though all nodes to see if we have a LFA for them. */
+                list_for_each(p, &graph->vertices) {
+                        v = list_entry(p, struct vertex, next);
 
-                /*
-                 * Check for every neighbor if dist(neighbor, destination) <
-                 * dist(neighbor, source) + dist(source, destination).
-                 */
-                for (j = 0; j < i; j++) {
-                        /* Exclude ourselves. */
-                        if (addrs[j] == v->addr)
+                        if (v->addr == s_addr)
                                 continue;
 
-                        if (n_dist[j][v->index] <
-                            s_dist[n_index[j]] + s_dist[v->index])
-                                if (add_lfa_to_table(table, v->addr, addrs[j]))
-                                        goto fail_add_lfa;
+                        /*
+                         * Check for every neighbor if
+                         * dist(neighbor, destination) <
+                         * dist(neighbor, source) + dist(source, destination).
+                         */
+                        for (j = 0; j < i; j++) {
+                                /* Exclude ourselves. */
+                                if (addrs[j] == v->addr)
+                                        continue;
+
+                                if (n_dist[j][v->index] <
+                                    s_dist[n_index[j]] + s_dist[v->index])
+                                        if (add_lfa_to_table(table, v->addr,
+                                                             addrs[j]))
+                                                goto fail_add_lfa;
+                        }
                 }
+
+                for (j = 0; j < i; j++)
+                        free(n_dist[j]);
+
+                break;
+        default:
+                log_err("Unsupported algorithm.");
+                goto fail_algo;
         }
 
         pthread_mutex_unlock(&graph->lock);
 
-        for (j = 0; j < i; j++)
-                free(n_dist[j]);
-
         free(s_dist);
 
         return 0;
@@ -686,6 +686,7 @@ int graph_routing_table_lfa(struct graph *     graph,
                 free(n_dist[k]);
  fail_dijkstra:
         free_routing_table(table);
+ fail_algo:
         free(s_dist);
  fail_table_simple:
         pthread_mutex_unlock(&graph->lock);
diff --git a/src/ipcpd/normal/pol/graph.h b/src/ipcpd/normal/pol/graph.h
index 13657fd0..7cd14ad6 100644
--- a/src/ipcpd/normal/pol/graph.h
+++ b/src/ipcpd/normal/pol/graph.h
@@ -28,6 +28,11 @@
 
 #include <inttypes.h>
 
+enum routing_algo {
+         ROUTING_SIMPLE = 0,
+         ROUTING_LFA
+};
+
 struct nhop {
         struct list_head next;
         uint64_t         nhop;
@@ -53,13 +58,10 @@ int            graph_del_edge(struct graph * graph,
                               uint64_t       d_addr);
 
 int            graph_routing_table(struct graph *     graph,
+                                   enum routing_algo  algo,
                                    uint64_t           s_addr,
                                    struct list_head * table);
 
-int            graph_routing_table_lfa(struct graph *     graph,
-                                       uint64_t           s_addr,
-                                       struct list_head * table);
-
 void           graph_free_routing_table(struct graph *     graph,
                                         struct list_head * table);
 
diff --git a/src/ipcpd/normal/pol/link_state.c b/src/ipcpd/normal/pol/link_state.c
index 1c418ffc..e2e9eab5 100644
--- a/src/ipcpd/normal/pol/link_state.c
+++ b/src/ipcpd/normal/pol/link_state.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -101,30 +105,26 @@ struct nb {
         enum nb_type     type;
 };
 
-typedef int (* rtable_fn_t)(struct graph *     graph,
-                            uint64_t           s_addr,
-                            struct list_head * table);
-
 struct {
-        struct list_head nbs;
-        size_t           nbs_len;
-        fset_t *         mgmt_set;
+        struct list_head  nbs;
+        size_t            nbs_len;
+        fset_t *          mgmt_set;
 
-        struct list_head db;
-        size_t           db_len;
+        struct list_head  db;
+        size_t            db_len;
 
-        pthread_rwlock_t db_lock;
+        pthread_rwlock_t  db_lock;
 
-        struct graph *   graph;
+        struct graph *    graph;
 
-        pthread_t        lsupdate;
-        pthread_t        lsreader;
-        pthread_t        listener;
+        pthread_t         lsupdate;
+        pthread_t         lsreader;
+        pthread_t         listener;
 
-        struct list_head routing_instances;
-        pthread_mutex_t  routing_i_lock;
+        struct list_head  routing_instances;
+        pthread_mutex_t   routing_i_lock;
 
-        rtable_fn_t      rtable;
+        enum routing_algo routing_algo;
 } ls;
 
 struct pol_routing_ops link_state_ops = {
@@ -500,7 +500,8 @@ static void calculate_pff(struct routing_i * instance)
         struct list_head * q;
         int                fds[PROG_MAX_FLOWS];
 
-        if (ls.rtable(ls.graph, ipcpi.dt_addr, &table))
+        if (graph_routing_table(ls.graph, ls.routing_algo,
+                                ipcpi.dt_addr, &table))
                 return;
 
         pff_lock(instance->pff);
@@ -902,11 +903,11 @@ int link_state_init(enum pol_routing pr)
         switch (pr) {
         case ROUTING_LINK_STATE:
                 log_dbg("Using link state routing policy.");
-                ls.rtable = graph_routing_table;
+                ls.routing_algo = ROUTING_SIMPLE;
                 break;
         case ROUTING_LINK_STATE_LFA:
                 log_dbg("Using Loop-Free Alternates policy.");
-                ls.rtable = graph_routing_table_lfa;
+                ls.routing_algo = ROUTING_LFA;
                 break;
         default:
                 goto fail_graph;
diff --git a/src/ipcpd/normal/pol/tests/graph_test.c b/src/ipcpd/normal/pol/tests/graph_test.c
index d226398c..8050f73a 100644
--- a/src/ipcpd/normal/pol/tests/graph_test.c
+++ b/src/ipcpd/normal/pol/tests/graph_test.c
@@ -39,7 +39,7 @@ int graph_test_entries(int entries)
         struct list_head * p;
         int                i = 0;
 
-        if (graph_routing_table(graph, 1, &table)) {
+        if (graph_routing_table(graph, ROUTING_SIMPLE, 1, &table)) {
                 printf("Failed to get routing table.\n");
                 return -1;
         }
@@ -63,7 +63,7 @@ int graph_test_double_link(void)
         struct list_head * p;
         int                i = 0;
 
-        if (graph_routing_table(graph, 1, &table)) {
+        if (graph_routing_table(graph, ROUTING_SIMPLE, 1, &table)) {
                 printf("Failed to get routing table.\n");
                 return -1;
         }
@@ -101,7 +101,7 @@ int graph_test_single_link(void)
         struct list_head * p;
         int                i = 0;
 
-        if (graph_routing_table(graph, 1, &table)) {
+        if (graph_routing_table(graph, ROUTING_SIMPLE, 1, &table)) {
                 printf("Failed to get routing table.\n");
                 return -1;
         }
@@ -243,7 +243,7 @@ int graph_test(int     argc,
                 return -1;
         }
 
-        if (graph_routing_table(graph, 1, &table)) {
+        if (graph_routing_table(graph, ROUTING_SIMPLE, 1, &table)) {
                 printf("Failed to get routing table.\n");
                 return -1;
         }
diff --git a/src/ipcpd/normal/sdu_sched.c b/src/ipcpd/normal/psched.c
index 6ce18ed5..27e5f1de 100644
--- a/src/ipcpd/normal/sdu_sched.c
+++ b/src/ipcpd/normal/psched.c
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2018
  *
- * SDU scheduler component
+ * Packet scheduler component
  *
  *    Dimitri Staessens <[email protected]>
  *    Sander Vrijders   <[email protected]>
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -28,7 +32,7 @@
 #include <ouroboros/notifier.h>
 
 #include "ipcp.h"
-#include "sdu_sched.h"
+#include "psched.h"
 #include "connmgr.h"
 
 #include <assert.h>
@@ -45,15 +49,15 @@ static int qos_prio [] = {
         QOS_PRIO_DATA
 };
 
-struct sdu_sched {
-        fset_t *      set[QOS_CUBE_MAX];
-        next_sdu_fn_t callback;
-        pthread_t     readers[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
+struct psched {
+        fset_t *         set[QOS_CUBE_MAX];
+        next_packet_fn_t callback;
+        pthread_t        readers[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
 };
 
 struct sched_info {
-        struct sdu_sched * sch;
-        qoscube_t          qc;
+        struct psched * sch;
+        qoscube_t       qc;
 };
 
 static void cleanup_reader(void * o)
@@ -61,13 +65,13 @@ static void cleanup_reader(void * o)
         fqueue_destroy((fqueue_t *) o);
 }
 
-static void * sdu_reader(void * o)
+static void * packet_reader(void * o)
 {
-        struct sdu_sched *   sched;
-        struct shm_du_buff * sdb;
-        int                  fd;
-        fqueue_t *           fq;
-        qoscube_t            qc;
+        struct psched *       sched;
+        struct shm_du_buff *  sdb;
+        int                   fd;
+        fqueue_t *            fq;
+        qoscube_t             qc;
 
         sched = ((struct sched_info *) o)->sch;
         qc    = ((struct sched_info *) o)->qc;
@@ -115,26 +119,26 @@ static void * sdu_reader(void * o)
         return (void *) 0;
 }
 
-struct sdu_sched * sdu_sched_create(next_sdu_fn_t callback)
+struct psched * psched_create(next_packet_fn_t callback)
 {
-        struct sdu_sched *  sdu_sched;
-        struct sched_info * infos[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
-        int                 i;
-        int                 j;
+        struct psched *       psched;
+        struct sched_info *   infos[QOS_CUBE_MAX * IPCP_SCHED_THR_MUL];
+        int                   i;
+        int                   j;
 
         assert(callback);
 
-        sdu_sched = malloc(sizeof(*sdu_sched));
-        if (sdu_sched == NULL)
+        psched = malloc(sizeof(*psched));
+        if (psched == NULL)
                 goto fail_malloc;
 
-        sdu_sched->callback = callback;
+        psched->callback = callback;
 
         for (i = 0; i < QOS_CUBE_MAX; ++i) {
-                sdu_sched->set[i] = fset_create();
-                if (sdu_sched->set[i] == NULL) {
+                psched->set[i] = fset_create();
+                if (psched->set[i] == NULL) {
                         for (j = 0; j < i; ++j)
-                                fset_destroy(sdu_sched->set[j]);
+                                fset_destroy(psched->set[j]);
                         goto fail_flow_set;
                 }
         }
@@ -146,17 +150,17 @@ struct sdu_sched * sdu_sched_create(next_sdu_fn_t callback)
                                 free(infos[j]);
                         goto fail_infos;
                 }
-                infos[i]->sch = sdu_sched;
+                infos[i]->sch = psched;
                 infos[i]->qc  = i % QOS_CUBE_MAX;
         }
 
         for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
-                if (pthread_create(&sdu_sched->readers[i], NULL,
-                                   sdu_reader, infos[i])) {
+                if (pthread_create(&psched->readers[i], NULL,
+                                   packet_reader, infos[i])) {
                         for (j = 0; j < i; ++j)
-                                pthread_cancel(sdu_sched->readers[j]);
+                                pthread_cancel(psched->readers[j]);
                         for (j = 0; j < i; ++j)
-                                pthread_join(sdu_sched->readers[j], NULL);
+                                pthread_join(psched->readers[j], NULL);
                         for (j = i; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
                                 free(infos[i]);
                         goto fail_infos;
@@ -177,61 +181,61 @@ struct sdu_sched * sdu_sched_create(next_sdu_fn_t callback)
                 par.sched_priority = min +
                         (qos_prio[i % QOS_CUBE_MAX] * (max - min) / 99);
 
-                if (pthread_setschedparam(sdu_sched->readers[i], pol, &par))
+                if (pthread_setschedparam(psched->readers[i], pol, &par))
                         goto fail_sched;
         }
 
-        return sdu_sched;
+        return psched;
 
  fail_sched:
         for (j = 0; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
-                pthread_cancel(sdu_sched->readers[j]);
+                pthread_cancel(psched->readers[j]);
         for (j = 0; j < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++j)
-                pthread_join(sdu_sched->readers[j], NULL);
+                pthread_join(psched->readers[j], NULL);
  fail_infos:
         for (j = 0; j < QOS_CUBE_MAX; ++j)
-                fset_destroy(sdu_sched->set[j]);
+                fset_destroy(psched->set[j]);
  fail_flow_set:
-        free(sdu_sched);
+        free(psched);
  fail_malloc:
         return NULL;
 }
 
-void sdu_sched_destroy(struct sdu_sched * sdu_sched)
+void psched_destroy(struct psched * psched)
 {
         int i;
 
-        assert(sdu_sched);
+        assert(psched);
 
         for (i = 0; i < QOS_CUBE_MAX * IPCP_SCHED_THR_MUL; ++i) {
-                pthread_cancel(sdu_sched->readers[i]);
-                pthread_join(sdu_sched->readers[i], NULL);
+                pthread_cancel(psched->readers[i]);
+                pthread_join(psched->readers[i], NULL);
         }
 
         for (i = 0; i < QOS_CUBE_MAX; ++i)
-                fset_destroy(sdu_sched->set[i]);
+                fset_destroy(psched->set[i]);
 
-        free(sdu_sched);
+        free(psched);
 }
 
-void sdu_sched_add(struct sdu_sched * sdu_sched,
-                   int                fd)
+void psched_add(struct psched * psched,
+                      int       fd)
 {
         qoscube_t qc;
 
-        assert(sdu_sched);
+        assert(psched);
 
         ipcp_flow_get_qoscube(fd, &qc);
-        fset_add(sdu_sched->set[qc], fd);
+        fset_add(psched->set[qc], fd);
 }
 
-void sdu_sched_del(struct sdu_sched * sdu_sched,
-                   int                fd)
+void psched_del(struct psched * psched,
+                      int       fd)
 {
         qoscube_t qc;
 
-        assert(sdu_sched);
+        assert(psched);
 
         ipcp_flow_get_qoscube(fd, &qc);
-        fset_del(sdu_sched->set[qc], fd);
+        fset_del(psched->set[qc], fd);
 }
diff --git a/src/ipcpd/normal/sdu_sched.h b/src/ipcpd/normal/psched.h
index cdbda272..137c8fd1 100644
--- a/src/ipcpd/normal/sdu_sched.h
+++ b/src/ipcpd/normal/psched.h
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2018
  *
- * SDU scheduler component
+ * Packet scheduler component
  *
  *    Dimitri Staessens <[email protected]>
  *    Sander Vrijders   <[email protected]>
@@ -20,24 +20,24 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
-#ifndef OUROBOROS_IPCPD_NORMAL_SDU_SCHED_H
-#define OUROBOROS_IPCPD_NORMAL_SDU_SCHED_H
+#ifndef OUROBOROS_IPCPD_NORMAL_PSCHED_H
+#define OUROBOROS_IPCPD_NORMAL_PSCHED_H
 
 #include <ouroboros/ipcp-dev.h>
 #include <ouroboros/fqueue.h>
 
-typedef void (* next_sdu_fn_t)(int                  fd,
-                               qoscube_t            qc,
-                               struct shm_du_buff * sdb);
+typedef void (* next_packet_fn_t)(int                  fd,
+                                  qoscube_t            qc,
+                                  struct shm_du_buff * sdb);
 
-struct sdu_sched * sdu_sched_create(next_sdu_fn_t callback);
+struct psched * psched_create(next_packet_fn_t callback);
 
-void               sdu_sched_destroy(struct sdu_sched * sdu_sched);
+void            psched_destroy(struct psched * psched);
 
-void               sdu_sched_add(struct sdu_sched * sdu_sched,
-                                 int                fd);
+void            psched_add(struct psched * psched,
+                           int             fd);
 
-void               sdu_sched_del(struct sdu_sched * sdu_sched,
-                                 int                fd);
+void            psched_del(struct psched * psched,
+                           int             fd);
 
-#endif /* OUROBOROS_IPCPD_NORMAL_SDU_SCHED_H */
+#endif /* OUROBOROS_IPCPD_NORMAL_PSCHED_H */
diff --git a/src/ipcpd/raptor/CMakeLists.txt b/src/ipcpd/raptor/CMakeLists.txt
index 06e6ee29..1883d9bb 100644
--- a/src/ipcpd/raptor/CMakeLists.txt
+++ b/src/ipcpd/raptor/CMakeLists.txt
@@ -16,6 +16,7 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
   find_path(RAPTOR_KERNEL_MODULE
     NAMES
     raptor.ko.gz
+    raptor.ko.xz
     HINTS
     /lib/modules/${CMAKE_SYSTEM_VERSION}/extra
   )
diff --git a/src/ipcpd/raptor/main.c b/src/ipcpd/raptor/main.c
index 4f0099b3..8f578611 100644
--- a/src/ipcpd/raptor/main.c
+++ b/src/ipcpd/raptor/main.c
@@ -64,9 +64,9 @@
 #include <sys/mman.h>
 
 #define THIS_TYPE          IPCP_RAPTOR
-#define MGMT_SAP           0x01
+#define MGMT_EID           0x01
 #define MAC_SIZE           6
-#define MAX_SAPS           64
+#define MAX_EIDS           64
 
 #define EVENT_WAIT_TIMEOUT 100  /* us */
 #define NAME_QUERY_TIMEOUT 2000 /* ms */
@@ -90,16 +90,23 @@
 #define NAME_QUERY_REPLY   3
 
 struct mgmt_msg {
-        uint8_t code;
-        uint8_t ssap;
-        uint8_t dsap;
-        uint8_t qoscube;
-        int8_t  response;
+        uint8_t  code;
+        uint8_t  seid;
+        uint8_t  deid;
+        int8_t   response;
+        /* QoS parameters from spec, aligned */
+        uint32_t loss;
+        uint64_t bandwidth;
+        uint32_t ber;
+        uint32_t max_gap;
+        uint32_t delay;
+        uint8_t  in_order;
+        uint8_t  availability;
 } __attribute__((packed));
 
 struct ef {
-        int8_t  sap;
-        int8_t  r_sap;
+        int8_t  eid;
+        int8_t  r_eid;
 };
 
 struct mgmt_frame {
@@ -113,7 +120,7 @@ struct {
 
         int                ioctl_fd;
 
-        struct bmp *       saps;
+        struct bmp *       eids;
         fset_t *           np1_flows;
         fqueue_t *         fq;
         int *              ef_to_fd;
@@ -145,13 +152,13 @@ static int raptor_data_init(void)
                 goto fail_fd_to_ef;
 
         raptor_data.ef_to_fd =
-                malloc(sizeof(*raptor_data.ef_to_fd) * MAX_SAPS);
+                malloc(sizeof(*raptor_data.ef_to_fd) * MAX_EIDS);
         if (raptor_data.ef_to_fd == NULL)
                 goto fail_ef_to_fd;
 
-        raptor_data.saps = bmp_create(MAX_SAPS, 2);
-        if (raptor_data.saps == NULL)
-                goto fail_saps;
+        raptor_data.eids = bmp_create(MAX_EIDS, 2);
+        if (raptor_data.eids == NULL)
+                goto fail_eids;
 
         raptor_data.np1_flows = fset_create();
         if (raptor_data.np1_flows == NULL)
@@ -161,12 +168,12 @@ static int raptor_data_init(void)
         if (raptor_data.fq == NULL)
                 goto fail_fq;
 
-        for (i = 0; i < MAX_SAPS; ++i)
+        for (i = 0; i < MAX_EIDS; ++i)
                 raptor_data.ef_to_fd[i] = -1;
 
         for (i = 0; i < SYS_MAX_FLOWS; ++i) {
-                raptor_data.fd_to_ef[i].sap   = -1;
-                raptor_data.fd_to_ef[i].r_sap = -1;
+                raptor_data.fd_to_ef[i].eid   = -1;
+                raptor_data.fd_to_ef[i].r_eid = -1;
         }
 
         raptor_data.shim_data = shim_data_create();
@@ -210,8 +217,8 @@ static int raptor_data_init(void)
  fail_fq:
         fset_destroy(raptor_data.np1_flows);
  fail_np1_flows:
-        bmp_destroy(raptor_data.saps);
- fail_saps:
+        bmp_destroy(raptor_data.eids);
+ fail_eids:
         free(raptor_data.ef_to_fd);
  fail_ef_to_fd:
         free(raptor_data.fd_to_ef);
@@ -227,13 +234,13 @@ static void raptor_data_fini(void)
         pthread_rwlock_destroy(&raptor_data.flows_lock);
         fqueue_destroy(raptor_data.fq);
         fset_destroy(raptor_data.np1_flows);
-        bmp_destroy(raptor_data.saps);
+        bmp_destroy(raptor_data.eids);
         free(raptor_data.fd_to_ef);
         free(raptor_data.ef_to_fd);
 }
 
 static int raptor_send_frame(struct shm_du_buff * sdb,
-                             uint8_t              dsap)
+                             uint8_t              deid)
 {
         uint8_t * frame;
         size_t    frame_len;
@@ -263,7 +270,7 @@ static int raptor_send_frame(struct shm_du_buff * sdb,
 
         frame[0] = (frame_len & 0x00FF) >> 0;
         frame[1] = (frame_len & 0xFF00) >> 8;
-        frame[2] = dsap;
+        frame[2] = deid;
 
         memcpy(&frame[RAPTOR_HEADER], payload, len);
 
@@ -276,9 +283,9 @@ static int raptor_send_frame(struct shm_du_buff * sdb,
         return 0;
 }
 
-static int raptor_sap_alloc(uint8_t         ssap,
+static int raptor_eid_alloc(uint8_t         seid,
                             const uint8_t * hash,
-                            qoscube_t       cube)
+                            qosspec_t       qs)
 {
         struct mgmt_msg *    msg;
         struct shm_du_buff * sdb;
@@ -288,14 +295,20 @@ static int raptor_sap_alloc(uint8_t         ssap,
                 return -1;
         }
 
-        msg          = (struct mgmt_msg *) shm_du_buff_head(sdb);
-        msg->code    = FLOW_REQ;
-        msg->ssap    = ssap;
-        msg->qoscube = cube;
+        msg               = (struct mgmt_msg *) shm_du_buff_head(sdb);
+        msg->code         = FLOW_REQ;
+        msg->seid         = seid;
+        msg->delay        = hton32(qs.delay);
+        msg->bandwidth    = hton64(qs.bandwidth);
+        msg->availability = qs.availability;
+        msg->loss         = hton32(qs.loss);
+        msg->ber          = hton32(qs.ber);
+        msg->in_order     = qs.in_order;
+        msg->max_gap      = hton32(qs.max_gap);
 
         memcpy(msg + 1, hash, ipcp_dir_hash_len());
 
-        if (raptor_send_frame(sdb, MGMT_SAP)) {
+        if (raptor_send_frame(sdb, MGMT_EID)) {
                 log_err("Failed to send management frame.");
                 ipcp_sdb_release(sdb);
                 return -1;
@@ -306,25 +319,25 @@ static int raptor_sap_alloc(uint8_t         ssap,
         return 0;
 }
 
-static int raptor_sap_alloc_resp(uint8_t   ssap,
-                                 uint8_t   dsap,
-                                 int       response)
+static int raptor_eid_alloc_resp(uint8_t seid,
+                                 uint8_t deid,
+                                 int     response)
 {
-        struct mgmt_msg * msg;
+        struct mgmt_msg *    msg;
         struct shm_du_buff * sdb;
 
         if (ipcp_sdb_reserve(&sdb, sizeof(*msg)) < 0) {
-                log_err("failed to reserve sdb for management frame.");
+                log_err("Failed to reserve sdb for management frame.");
                 return -1;
         }
 
         msg           = (struct mgmt_msg *) shm_du_buff_head(sdb);
         msg->code     = FLOW_REPLY;
-        msg->ssap     = ssap;
-        msg->dsap     = dsap;
+        msg->seid     = seid;
+        msg->deid     = deid;
         msg->response = response;
 
-        if (raptor_send_frame(sdb, MGMT_SAP)) {
+        if (raptor_send_frame(sdb, MGMT_EID)) {
                 log_err("Failed to send management frame.");
                 ipcp_sdb_release(sdb);
                 return -1;
@@ -335,9 +348,9 @@ static int raptor_sap_alloc_resp(uint8_t   ssap,
         return 0;
 }
 
-static int raptor_sap_req(uint8_t         r_sap,
+static int raptor_eid_req(uint8_t         r_eid,
                           const uint8_t * dst,
-                          qoscube_t       cube)
+                          qosspec_t       qs)
 {
         struct timespec ts = {0, EVENT_WAIT_TIMEOUT * 1000};
         struct timespec abstime;
@@ -361,7 +374,7 @@ static int raptor_sap_req(uint8_t         r_sap,
         }
 
         /* reply to IRM, called under lock to prevent race */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), cube);
+        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -370,7 +383,7 @@ static int raptor_sap_req(uint8_t         r_sap,
 
         pthread_rwlock_wrlock(&raptor_data.flows_lock);
 
-        raptor_data.fd_to_ef[fd].r_sap = r_sap;
+        raptor_data.fd_to_ef[fd].r_eid = r_eid;
 
         ipcpi.alloc_id = fd;
         pthread_cond_broadcast(&ipcpi.alloc_cond);
@@ -378,13 +391,13 @@ static int raptor_sap_req(uint8_t         r_sap,
         pthread_rwlock_unlock(&raptor_data.flows_lock);
         pthread_mutex_unlock(&ipcpi.alloc_lock);
 
-        log_dbg("New flow request, fd %d, remote SAP %d.", fd, r_sap);
+        log_dbg("New flow request, fd %d, remote EID %d.", fd, r_eid);
 
         return 0;
 }
 
-static int raptor_sap_alloc_reply(uint8_t ssap,
-                                  int     dsap,
+static int raptor_eid_alloc_reply(uint8_t seid,
+                                  int     deid,
                                   int     response)
 {
         int ret = 0;
@@ -392,21 +405,21 @@ static int raptor_sap_alloc_reply(uint8_t ssap,
 
         pthread_rwlock_wrlock(&raptor_data.flows_lock);
 
-        fd = raptor_data.ef_to_fd[dsap];
+        fd = raptor_data.ef_to_fd[deid];
         if (fd < 0) {
                 pthread_rwlock_unlock(& raptor_data.flows_lock);
-                log_err("No flow found with that SAP.");
+                log_err("No flow found with that EID.");
                 return -1; /* -EFLOWNOTFOUND */
         }
 
         if (response)
-                bmp_release(raptor_data.saps, raptor_data.fd_to_ef[fd].sap);
+                bmp_release(raptor_data.eids, raptor_data.fd_to_ef[fd].eid);
         else
-                raptor_data.fd_to_ef[fd].r_sap = ssap;
+                raptor_data.fd_to_ef[fd].r_eid = seid;
 
         pthread_rwlock_unlock(&raptor_data.flows_lock);
 
-        log_dbg("Flow reply, fd %d, SSAP %d, DSAP %d.", fd, ssap, dsap);
+        log_dbg("Flow reply, fd %d, SEID %d, DEID %d.", fd, seid, deid);
 
         if ((ret = ipcp_flow_alloc_reply(fd, response)) < 0)
                 return -1;
@@ -424,16 +437,16 @@ static int raptor_name_query_req(const uint8_t * hash)
                 return 0;
 
         if (ipcp_sdb_reserve(&sdb, sizeof(*msg) + ipcp_dir_hash_len()) < 0) {
-                log_err("failed to reserve sdb for management frame.");
+                log_err("Failed to reserve sdb for management frame.");
                 return -1;
         }
 
-        msg          = (struct mgmt_msg *) shm_du_buff_head(sdb);
-        msg->code    = NAME_QUERY_REPLY;
+        msg       = (struct mgmt_msg *) shm_du_buff_head(sdb);
+        msg->code = NAME_QUERY_REPLY;
 
         memcpy(msg + 1, hash, ipcp_dir_hash_len());
 
-        if (raptor_send_frame(sdb, MGMT_SAP)) {
+        if (raptor_send_frame(sdb, MGMT_EID)) {
                 log_err("Failed to send management frame.");
                 ipcp_sdb_release(sdb);
                 return -1;
@@ -456,8 +469,9 @@ static int raptor_name_query_reply(const uint8_t * hash)
 static int raptor_mgmt_frame(const uint8_t * buf,
                              size_t          len)
 {
-        struct mgmt_msg * msg = (struct mgmt_msg *) buf;
-        uint8_t * hash = (uint8_t *) (msg + 1);
+        struct mgmt_msg * msg  = (struct mgmt_msg *) buf;
+        uint8_t *         hash = (uint8_t *) (msg + 1);
+        qosspec_t         qs;
 
         switch (msg->code) {
         case FLOW_REQ:
@@ -466,8 +480,16 @@ static int raptor_mgmt_frame(const uint8_t * buf,
                         return -1;
                 }
 
+                qs.delay        = ntoh32(msg->delay);
+                qs.bandwidth    = ntoh64(msg->bandwidth);
+                qs.availability = msg->availability;
+                qs.loss         = ntoh32(msg->loss);
+                qs.ber          = ntoh32(msg->ber);
+                qs.in_order     = msg->in_order;
+                qs.max_gap      = ntoh32(msg->max_gap);
+
                 if (shim_data_reg_has(raptor_data.shim_data, hash))
-                        raptor_sap_req(msg->ssap, hash, msg->qoscube);
+                        raptor_eid_req(msg->seid, hash, qs);
                 break;
         case FLOW_REPLY:
                 if (len != sizeof(*msg)) {
@@ -475,7 +497,7 @@ static int raptor_mgmt_frame(const uint8_t * buf,
                         return -1;
                 }
 
-                raptor_sap_alloc_reply(msg->ssap, msg->dsap, msg->response);
+                raptor_eid_alloc_reply(msg->seid, msg->deid, msg->response);
                 break;
         case NAME_QUERY_REQ:
                 if (len != sizeof(*msg) + ipcp_dir_hash_len()) {
@@ -552,7 +574,7 @@ static void * raptor_mgmt_handler(void * o)
 
 static void raptor_recv_frame(uint8_t * frame)
 {
-        uint8_t              dsap;
+        uint8_t              deid;
         uint8_t *            payload;
         size_t               frame_len;
         size_t               length;
@@ -577,14 +599,14 @@ static void raptor_recv_frame(uint8_t * frame)
                 return;
         }
 
-        dsap    = frame[2];
+        deid    = frame[2];
         payload = &frame[RAPTOR_HEADER];
         length  = frame_len - RAPTOR_HEADER;
 
         shm_du_buff_head_release(sdb, RAPTOR_HEADER);
         shm_du_buff_tail_release(sdb, RAPTOR_PAGE - frame_len);
 
-        if (dsap == MGMT_SAP) {
+        if (deid == MGMT_EID) {
                 pthread_mutex_lock(&raptor_data.mgmt_lock);
 
                 mgmt_frame = malloc(sizeof(*mgmt_frame));
@@ -604,7 +626,7 @@ static void raptor_recv_frame(uint8_t * frame)
         } else {
                 pthread_rwlock_rdlock(&raptor_data.flows_lock);
 
-                fd = raptor_data.ef_to_fd[dsap];
+                fd = raptor_data.ef_to_fd[deid];
                 if (fd < 0) {
                         pthread_rwlock_unlock(&raptor_data.flows_lock);
                         ipcp_sdb_release(sdb);
@@ -647,7 +669,7 @@ static void * raptor_send_thread(void * o)
         struct timespec      timeout = {0, EVENT_WAIT_TIMEOUT * 1000};
         int                  fd;
         struct shm_du_buff * sdb;
-        uint8_t              dsap;
+        uint8_t              deid;
 
         (void) o;
 
@@ -662,9 +684,9 @@ static void * raptor_send_thread(void * o)
                                 continue;
                         }
 
-                        dsap = raptor_data.fd_to_ef[fd].r_sap;
+                        deid = raptor_data.fd_to_ef[fd].r_eid;
 
-                        raptor_send_frame(sdb, dsap);
+                        raptor_send_frame(sdb, deid);
                 }
                 pthread_rwlock_unlock(&raptor_data.flows_lock);
         }
@@ -886,7 +908,7 @@ static int raptor_query(const uint8_t * hash)
                 return -1;
         }
 
-        if (raptor_send_frame(sdb, MGMT_SAP)) {
+        if (raptor_send_frame(sdb, MGMT_EID)) {
                 log_err("Failed to send management frame.");
                 ipcp_sdb_release(sdb);
                 return -1;
@@ -901,19 +923,14 @@ static int raptor_query(const uint8_t * hash)
 
 static int raptor_flow_alloc(int             fd,
                              const uint8_t * hash,
-                             qoscube_t       cube)
+                             qosspec_t       qs)
 {
-        uint8_t  ssap = 0;
+        uint8_t  seid = 0;
 
         log_dbg("Allocating flow to " HASH_FMT ".", HASH_VAL(hash));
 
         assert(hash);
 
-        if (cube != QOS_CUBE_BE) {
-                log_dbg("Unsupported QoS requested.");
-                return -1;
-        }
-
         if (!shim_data_dir_has(raptor_data.shim_data, hash)) {
                 log_err("Destination unreachable.");
                 return -1;
@@ -921,29 +938,29 @@ static int raptor_flow_alloc(int             fd,
 
         pthread_rwlock_wrlock(&raptor_data.flows_lock);
 
-        ssap =  bmp_allocate(raptor_data.saps);
-        if (!bmp_is_id_valid(raptor_data.saps, ssap)) {
+        seid =  bmp_allocate(raptor_data.eids);
+        if (!bmp_is_id_valid(raptor_data.eids, seid)) {
                 pthread_rwlock_unlock(&raptor_data.flows_lock);
                 return -1;
         }
 
-        raptor_data.fd_to_ef[fd].sap = ssap;
-        raptor_data.ef_to_fd[ssap]   = fd;
+        raptor_data.fd_to_ef[fd].eid = seid;
+        raptor_data.ef_to_fd[seid]   = fd;
 
         pthread_rwlock_unlock(&raptor_data.flows_lock);
 
-        if (raptor_sap_alloc(ssap, hash, cube) < 0) {
+        if (raptor_eid_alloc(seid, hash, qs) < 0) {
                 pthread_rwlock_wrlock(&raptor_data.flows_lock);
-                bmp_release(raptor_data.saps, raptor_data.fd_to_ef[fd].sap);
-                raptor_data.fd_to_ef[fd].sap = -1;
-                raptor_data.ef_to_fd[ssap]   = -1;
+                bmp_release(raptor_data.eids, raptor_data.fd_to_ef[fd].eid);
+                raptor_data.fd_to_ef[fd].eid = -1;
+                raptor_data.ef_to_fd[seid]   = -1;
                 pthread_rwlock_unlock(&raptor_data.flows_lock);
                 return -1;
         }
 
         fset_add(raptor_data.np1_flows, fd);
 
-        log_dbg("Pending flow with fd %d on SAP %d.", fd, ssap);
+        log_dbg("Pending flow with fd %d on EID %d.", fd, seid);
 
         return 0;
 }
@@ -953,8 +970,8 @@ static int raptor_flow_alloc_resp(int fd,
 {
         struct timespec ts    = {0, EVENT_WAIT_TIMEOUT * 1000};
         struct timespec abstime;
-        uint8_t         ssap  = 0;
-        uint8_t         r_sap = 0;
+        uint8_t         seid  = 0;
+        uint8_t         r_eid = 0;
 
         clock_gettime(PTHREAD_COND_CLOCK, &abstime);
 
@@ -979,35 +996,35 @@ static int raptor_flow_alloc_resp(int fd,
 
         pthread_rwlock_wrlock(&raptor_data.flows_lock);
 
-        ssap = bmp_allocate(raptor_data.saps);
-        if (!bmp_is_id_valid(raptor_data.saps, ssap)) {
+        seid = bmp_allocate(raptor_data.eids);
+        if (!bmp_is_id_valid(raptor_data.eids, seid)) {
                 pthread_rwlock_unlock(&raptor_data.flows_lock);
                 return -1;
         }
 
-        raptor_data.fd_to_ef[fd].sap = ssap;
-        r_sap = raptor_data.fd_to_ef[fd].r_sap;
-        raptor_data.ef_to_fd[ssap] = fd;
+        raptor_data.fd_to_ef[fd].eid = seid;
+        r_eid = raptor_data.fd_to_ef[fd].r_eid;
+        raptor_data.ef_to_fd[seid] = fd;
 
         pthread_rwlock_unlock(&raptor_data.flows_lock);
 
-        if (raptor_sap_alloc_resp(ssap, r_sap, response) < 0) {
+        if (raptor_eid_alloc_resp(seid, r_eid, response) < 0) {
                 pthread_rwlock_wrlock(&raptor_data.flows_lock);
-                bmp_release(raptor_data.saps, raptor_data.fd_to_ef[fd].sap);
+                bmp_release(raptor_data.eids, raptor_data.fd_to_ef[fd].eid);
                 pthread_rwlock_unlock(&raptor_data.flows_lock);
                 return -1;
         }
 
         fset_add(raptor_data.np1_flows, fd);
 
-        log_dbg("Accepted flow, fd %d, SAP %d.", fd, (uint8_t)ssap);
+        log_dbg("Accepted flow, fd %d, EID %d.", fd, (uint8_t)seid);
 
         return 0;
 }
 
 static int raptor_flow_dealloc(int fd)
 {
-        uint8_t sap;
+        uint8_t eid;
 
         ipcp_flow_fini(fd);
 
@@ -1015,12 +1032,12 @@ static int raptor_flow_dealloc(int fd)
 
         fset_del(raptor_data.np1_flows, fd);
 
-        sap = raptor_data.fd_to_ef[fd].sap;
-        bmp_release(raptor_data.saps, sap);
-        raptor_data.fd_to_ef[fd].sap = -1;
-        raptor_data.fd_to_ef[fd].r_sap = -1;
+        eid = raptor_data.fd_to_ef[fd].eid;
+        bmp_release(raptor_data.eids, eid);
+        raptor_data.fd_to_ef[fd].eid = -1;
+        raptor_data.fd_to_ef[fd].r_eid = -1;
 
-        raptor_data.ef_to_fd[sap] = -1;
+        raptor_data.ef_to_fd[eid] = -1;
 
         pthread_rwlock_unlock(&raptor_data.flows_lock);
 
diff --git a/src/ipcpd/shim-data.c b/src/ipcpd/shim-data.c
index 27b98171..6c28c79f 100644
--- a/src/ipcpd/shim-data.c
+++ b/src/ipcpd/shim-data.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
diff --git a/src/ipcpd/shim-data.h b/src/ipcpd/shim-data.h
index 336ffa35..7a8c01c4 100644
--- a/src/ipcpd/shim-data.h
+++ b/src/ipcpd/shim-data.h
@@ -23,7 +23,6 @@
 #ifndef OUROBOROS_IPCPD_IPCP_DATA_H
 #define OUROBOROS_IPCPD_IPCP_DATA_H
 
-#include <ouroboros/qoscube.h>
 #include <ouroboros/list.h>
 
 #include <sys/types.h>
diff --git a/src/ipcpd/udp/main.c b/src/ipcpd/udp/main.c
index 2e59e1a5..a1af1e85 100644
--- a/src/ipcpd/udp/main.c
+++ b/src/ipcpd/udp/main.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -50,27 +54,34 @@
 #include <sys/wait.h>
 #include <fcntl.h>
 
-#define FLOW_REQ              1
-#define FLOW_REPLY            2
+#define FLOW_REQ                 1
+#define FLOW_REPLY               2
 
-#define THIS_TYPE             IPCP_UDP
-#define LISTEN_PORT           htons(0x0D1F)
-#define SHIM_UDP_BUF_SIZE     256
-#define SHIM_UDP_MSG_SIZE     256
-#define SHIM_UDP_MAX_SDU_SIZE 8980
-#define DNS_TTL               86400
-#define FD_UPDATE_TIMEOUT     100 /* microseconds */
+#define THIS_TYPE                IPCP_UDP
+#define LISTEN_PORT              htons(0x0D1F)
+#define SHIM_UDP_BUF_SIZE        256
+#define SHIM_UDP_MSG_SIZE        256
+#define SHIM_UDP_MAX_PACKET_SIZE 8980
+#define DNS_TTL                  86400
+#define FD_UPDATE_TIMEOUT        100 /* microseconds */
 
-#define local_ip              (udp_data.s_saddr.sin_addr.s_addr)
+#define local_ip                 (udp_data.s_saddr.sin_addr.s_addr)
 
-#define UDP_MAX_PORTS         0xFFFF
+#define UDP_MAX_PORTS            0xFFFF
 
 struct mgmt_msg {
         uint16_t src_udp_port;
         uint16_t dst_udp_port;
         uint8_t  code;
-        uint8_t  qoscube;
         uint8_t  response;
+        /* QoS parameters from spec, aligned */
+        uint8_t  availability;
+        uint8_t  in_order;
+        uint32_t delay;
+        uint64_t bandwidth;
+        uint32_t loss;
+        uint32_t ber;
+        uint32_t max_gap;
 } __attribute__((packed));
 
 struct uf {
@@ -95,9 +106,9 @@ struct {
         struct uf          fd_to_uf[SYS_MAX_FLOWS];
         pthread_rwlock_t   flows_lock;
 
-        pthread_t          sduloop;
+        pthread_t          packet_loop;
         pthread_t          handler;
-        pthread_t          sdu_reader;
+        pthread_t          packet_reader;
 
         bool               fd_set_mod;
         pthread_cond_t     fd_set_cond;
@@ -108,6 +119,15 @@ static int udp_data_init(void)
 {
         int i;
 
+        if (pthread_rwlock_init(&udp_data.flows_lock, NULL))
+                return -1;
+
+        if (pthread_cond_init(&udp_data.fd_set_cond, NULL))
+                goto fail_set_cond;
+
+        if (pthread_mutex_init(&udp_data.fd_set_lock, NULL))
+                goto fail_set_lock;
+
         for (i = 0; i < FD_SETSIZE; ++i)
                 udp_data.uf_to_fd[i] = -1;
 
@@ -120,26 +140,28 @@ static int udp_data_init(void)
 
         udp_data.np1_flows = fset_create();
         if (udp_data.np1_flows == NULL)
-                return -ENOMEM;
+                goto fail_fset;
 
         udp_data.fq = fqueue_create();
-        if (udp_data.fq == NULL) {
-                fset_destroy(udp_data.np1_flows);
-                return -ENOMEM;
-        }
+        if (udp_data.fq == NULL)
+                goto fail_fqueue;
 
         udp_data.shim_data = shim_data_create();
-        if (udp_data.shim_data == NULL) {
-                fqueue_destroy(udp_data.fq);
-                fset_destroy(udp_data.np1_flows);
-                return -ENOMEM;
-        }
-
-        pthread_rwlock_init(&udp_data.flows_lock, NULL);
-        pthread_cond_init(&udp_data.fd_set_cond, NULL);
-        pthread_mutex_init(&udp_data.fd_set_lock, NULL);
+        if (udp_data.shim_data == NULL)
+                goto fail_data;
 
         return 0;
+ fail_data:
+        fqueue_destroy(udp_data.fq);
+ fail_fqueue:
+        fset_destroy(udp_data.np1_flows);
+ fail_fset:
+        pthread_mutex_destroy(&udp_data.fd_set_lock);
+ fail_set_lock:
+        pthread_cond_destroy(&udp_data.fd_set_cond);
+ fail_set_cond:
+        pthread_rwlock_destroy(&udp_data.flows_lock);
+        return -1;
 }
 
 static void udp_data_fini(void)
@@ -204,7 +226,7 @@ static int send_shim_udp_msg(uint8_t * buf,
 static int ipcp_udp_port_alloc(uint32_t        dst_ip_addr,
                                uint16_t        src_udp_port,
                                const uint8_t * dst,
-                               qoscube_t       cube)
+                               qosspec_t       qs)
 {
         uint8_t *         buf;
         struct mgmt_msg * msg;
@@ -220,7 +242,13 @@ static int ipcp_udp_port_alloc(uint32_t        dst_ip_addr,
         msg               = (struct mgmt_msg *) buf;
         msg->code         = FLOW_REQ;
         msg->src_udp_port = src_udp_port;
-        msg->qoscube      = cube;
+        msg->delay        = hton32(qs.delay);
+        msg->bandwidth    = hton64(qs.bandwidth);
+        msg->availability = qs.availability;
+        msg->loss         = hton32(qs.loss);
+        msg->ber          = hton32(qs.ber);
+        msg->in_order     = qs.in_order;
+        msg->max_gap      = hton32(qs.max_gap);
 
         memcpy(msg + 1, dst, ipcp_dir_hash_len());
 
@@ -257,7 +285,7 @@ static int ipcp_udp_port_alloc_resp(uint32_t dst_ip_addr,
 
 static int ipcp_udp_port_req(struct sockaddr_in * c_saddr,
                              const uint8_t *      dst,
-                             qoscube_t            cube)
+                             qosspec_t            qs)
 {
         struct timespec    ts          = {0, FD_UPDATE_TIMEOUT * 1000};
         struct timespec    abstime;
@@ -311,11 +339,12 @@ static int ipcp_udp_port_req(struct sockaddr_in * c_saddr,
         if (ipcp_get_state() != IPCP_OPERATIONAL) {
                 log_dbg("Won't allocate over non-operational IPCP.");
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
+                close(skfd);
                 return -1;
         }
 
         /* reply to IRM */
-        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), cube);
+        fd = ipcp_flow_req_arr(getpid(), dst, ipcp_dir_hash_len(), qs);
         if (fd < 0) {
                 pthread_mutex_unlock(&ipcpi.alloc_lock);
                 log_err("Could not get new flow from IRMd.");
@@ -371,6 +400,11 @@ static int ipcp_udp_port_alloc_reply(uint16_t src_udp_port,
         pthread_rwlock_rdlock(&udp_data.flows_lock);
 
         fd = udp_port_to_fd(dst_udp_port);
+        if (fd < 0) {
+                pthread_rwlock_unlock(&udp_data.flows_lock);
+                return -1;
+        }
+
         skfd = udp_data.fd_to_uf[fd].skfd;
 
         pthread_rwlock_unlock(&udp_data.flows_lock);
@@ -415,11 +449,11 @@ static void * ipcp_udp_listener(void * o)
 
         while (true) {
                 struct mgmt_msg * msg = NULL;
-
+                qosspec_t         qs;
                 memset(&buf, 0, SHIM_UDP_MSG_SIZE);
-                n = sizeof(c_saddr);
                 n = recvfrom(sfd, buf, SHIM_UDP_MSG_SIZE, 0,
-                             (struct sockaddr *) &c_saddr, (unsigned *) &n);
+                             (struct sockaddr *) &c_saddr,
+                             (socklen_t *) sizeof(c_saddr));
                 if (n < 0)
                         continue;
 
@@ -434,9 +468,16 @@ static void * ipcp_udp_listener(void * o)
                 switch (msg->code) {
                 case FLOW_REQ:
                         c_saddr.sin_port = msg->src_udp_port;
+                        qs.delay = ntoh32(msg->delay);
+                        qs.bandwidth = ntoh64(msg->bandwidth);
+                        qs.availability = msg->availability;
+                        qs.loss = ntoh32(msg->loss);
+                        qs.ber = ntoh32(msg->ber);
+                        qs.in_order = msg->in_order;
+                        qs.max_gap = ntoh32(msg->max_gap);
                         ipcp_udp_port_req(&c_saddr,
                                           (uint8_t *) (msg + 1),
-                                          msg->qoscube);
+                                          qs);
                         break;
                 case FLOW_REPLY:
                         ipcp_udp_port_alloc_reply(msg->src_udp_port,
@@ -454,13 +495,13 @@ static void * ipcp_udp_listener(void * o)
         return 0;
 }
 
-static void * ipcp_udp_sdu_reader(void * o)
+static void * ipcp_udp_packet_reader(void * o)
 {
         ssize_t            n;
         int                skfd;
         int                fd;
         /* FIXME: avoid this copy */
-        char               buf[SHIM_UDP_MAX_SDU_SIZE];
+        char               buf[SHIM_UDP_MAX_PACKET_SIZE];
         struct sockaddr_in r_saddr;
         struct timeval     tv = {0, FD_UPDATE_TIMEOUT};
         fd_set             read_fds;
@@ -492,7 +533,7 @@ static void * ipcp_udp_sdu_reader(void * o)
                         n = sizeof(r_saddr);
                         if ((n = recvfrom(skfd,
                                           &buf,
-                                          SHIM_UDP_MAX_SDU_SIZE,
+                                          SHIM_UDP_MAX_PACKET_SIZE,
                                           0,
                                           (struct sockaddr *) &r_saddr,
                                           (unsigned *) &n)) <= 0)
@@ -511,7 +552,7 @@ static void * ipcp_udp_sdu_reader(void * o)
         return (void *) 0;
 }
 
-static void * ipcp_udp_sdu_loop(void * o)
+static void * ipcp_udp_packet_loop(void * o)
 {
         int fd;
         struct shm_du_buff * sdb;
@@ -534,13 +575,14 @@ static void * ipcp_udp_sdu_loop(void * o)
 
                         pthread_rwlock_unlock(&udp_data.flows_lock);
 
-                        pthread_cleanup_push((void (*)(void *)) ipcp_sdb_release,
+                        pthread_cleanup_push((void (*)(void *))
+                                             ipcp_sdb_release,
                                              (void *) sdb);
 
                         if (send(fd, shm_du_buff_head(sdb),
                                  shm_du_buff_tail(sdb) - shm_du_buff_head(sdb),
                                  0) < 0)
-                                log_err("Failed to send SDU.");
+                                log_err("Failed to send PACKET.");
 
                         pthread_cleanup_pop(true);
                 }
@@ -624,20 +666,20 @@ static int ipcp_udp_bootstrap(const struct ipcp_config * conf)
                 goto fail_bind;
         }
 
-        if (pthread_create(&udp_data.sdu_reader,
+        if (pthread_create(&udp_data.packet_reader,
                            NULL,
-                           ipcp_udp_sdu_reader,
+                           ipcp_udp_packet_reader,
                            NULL)) {
                 ipcp_set_state(IPCP_INIT);
-                goto fail_sdu_reader;
+                goto fail_packet_reader;
         }
 
-        if (pthread_create(&udp_data.sduloop,
+        if (pthread_create(&udp_data.packet_loop,
                            NULL,
-                           ipcp_udp_sdu_loop,
+                           ipcp_udp_packet_loop,
                            NULL)) {
                 ipcp_set_state(IPCP_INIT);
-                goto fail_sduloop;
+                goto fail_packet_loop;
         }
 
         log_dbg("Bootstrapped IPCP over UDP with pid %d.", getpid());
@@ -646,10 +688,10 @@ static int ipcp_udp_bootstrap(const struct ipcp_config * conf)
 
         return 0;
 
- fail_sduloop:
-        pthread_cancel(udp_data.sdu_reader);
-        pthread_join(udp_data.sdu_reader, NULL);
- fail_sdu_reader:
+ fail_packet_loop:
+        pthread_cancel(udp_data.packet_reader);
+        pthread_join(udp_data.packet_reader, NULL);
+ fail_packet_reader:
         pthread_cancel(udp_data.handler);
         pthread_join(udp_data.handler, NULL);
  fail_bind:
@@ -753,7 +795,8 @@ static uint32_t ddns_resolve(char *   name,
         close(pipe_fd[0]);
 
         waitpid(pid, &wstatus, 0);
-        if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0)
+        if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0 &&
+            count != SHIM_UDP_BUF_SIZE)
                 log_dbg("Succesfully communicated with nslookup.");
         else
                 log_err("Failed to resolve DNS address.");
@@ -946,7 +989,7 @@ static int ipcp_udp_query(const uint8_t * hash)
 
 static int ipcp_udp_flow_alloc(int             fd,
                                const uint8_t * dst,
-                               qoscube_t       cube)
+                               qosspec_t       qs)
 {
         struct sockaddr_in r_saddr; /* server address */
         struct sockaddr_in f_saddr; /* flow */
@@ -956,14 +999,13 @@ static int ipcp_udp_flow_alloc(int             fd,
 
         log_dbg("Allocating flow to " HASH_FMT ".", HASH_VAL(dst));
 
-        assert(dst);
+        (void) qs;
 
-        if (cube > QOS_CUBE_DATA) {
-                log_dbg("Unsupported QoS requested.");
-                return -1;
-        }
+        assert(dst);
 
         skfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+        if (skfd < 0)
+                return -1;
 
         /* this socket is for the flow */
         memset((char *) &f_saddr, 0, sizeof(f_saddr));
@@ -1010,7 +1052,7 @@ static int ipcp_udp_flow_alloc(int             fd,
 
         pthread_rwlock_unlock(&udp_data.flows_lock);
 
-        if (ipcp_udp_port_alloc(ip_addr, f_saddr.sin_port, dst, cube) < 0) {
+        if (ipcp_udp_port_alloc(ip_addr, f_saddr.sin_port, dst, qs) < 0) {
                 pthread_rwlock_wrlock(&udp_data.flows_lock);
 
                 udp_data.fd_to_uf[fd].udp  = -1;
@@ -1180,13 +1222,13 @@ int main(int    argc,
         ipcp_shutdown();
 
         if (ipcp_get_state() == IPCP_SHUTDOWN) {
-                pthread_cancel(udp_data.sduloop);
+                pthread_cancel(udp_data.packet_loop);
                 pthread_cancel(udp_data.handler);
-                pthread_cancel(udp_data.sdu_reader);
+                pthread_cancel(udp_data.packet_reader);
 
-                pthread_join(udp_data.sduloop, NULL);
+                pthread_join(udp_data.packet_loop, NULL);
                 pthread_join(udp_data.handler, NULL);
-                pthread_join(udp_data.sdu_reader, NULL);
+                pthread_join(udp_data.packet_reader, NULL);
         }
 
         udp_data_fini();
diff --git a/src/irmd/ipcp.c b/src/irmd/ipcp.c
index dc8f1c6e..20aee79f 100644
--- a/src/irmd/ipcp.c
+++ b/src/irmd/ipcp.c
@@ -429,28 +429,29 @@ int ipcp_query(pid_t           pid,
 }
 
 int ipcp_flow_alloc(pid_t           pid,
-                    int             port_id,
+                    int             flow_id,
                     pid_t           n_pid,
                     const uint8_t * dst,
                     size_t          len,
-                    qoscube_t       cube)
+                    qosspec_t       qs)
 {
-        ipcp_msg_t   msg      = IPCP_MSG__INIT;
-        ipcp_msg_t * recv_msg = NULL;
-        int          ret      = -1;
+        ipcp_msg_t    msg      = IPCP_MSG__INIT;
+        qosspec_msg_t qs_msg;
+        ipcp_msg_t *  recv_msg = NULL;
+        int           ret      = -1;
 
         assert(dst);
 
         msg.code         = IPCP_MSG_CODE__IPCP_FLOW_ALLOC;
-        msg.has_port_id  = true;
-        msg.port_id      = port_id;
+        msg.has_flow_id  = true;
+        msg.flow_id      = flow_id;
         msg.has_pid      = true;
         msg.pid          = n_pid;
         msg.has_hash     = true;
         msg.hash.len     = len;
         msg.hash.data    = (uint8_t *) dst;
-        msg.has_qoscube  = true;
-        msg.qoscube      = cube;
+        qs_msg           = spec_to_msg(&qs);
+        msg.qosspec      = &qs_msg;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -468,7 +469,7 @@ int ipcp_flow_alloc(pid_t           pid,
 }
 
 int ipcp_flow_alloc_resp(pid_t pid,
-                         int   port_id,
+                         int   flow_id,
                          pid_t n_pid,
                          int   response)
 {
@@ -477,8 +478,8 @@ int ipcp_flow_alloc_resp(pid_t pid,
         int          ret      = -1;
 
         msg.code         = IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP;
-        msg.has_port_id  = true;
-        msg.port_id      = port_id;
+        msg.has_flow_id  = true;
+        msg.flow_id      = flow_id;
         msg.has_pid      = true;
         msg.pid          = n_pid;
         msg.has_response = true;
@@ -500,15 +501,15 @@ int ipcp_flow_alloc_resp(pid_t pid,
 }
 
 int ipcp_flow_dealloc(pid_t pid,
-                      int   port_id)
+                      int   flow_id)
 {
         ipcp_msg_t   msg      = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int          ret      = -1;
 
         msg.code        = IPCP_MSG_CODE__IPCP_FLOW_DEALLOC;
-        msg.has_port_id = true;
-        msg.port_id     = port_id;
+        msg.has_flow_id = true;
+        msg.flow_id     = flow_id;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
diff --git a/src/irmd/ipcp.h b/src/irmd/ipcp.h
index 8ff062b2..8d9686c2 100644
--- a/src/irmd/ipcp.h
+++ b/src/irmd/ipcp.h
@@ -22,7 +22,6 @@
 
 #include <ouroboros/ipcp.h>
 #include <ouroboros/sockets.h>
-#include <ouroboros/qoscube.h>
 
 #include <sys/types.h>
 
@@ -63,18 +62,18 @@ int   ipcp_query(pid_t           pid,
                  size_t          len);
 
 int   ipcp_flow_alloc(pid_t           pid,
-                      int             port_id,
+                      int             flow_id,
                       pid_t           n_pid,
                       const uint8_t * dst,
                       size_t          len,
-                      qoscube_t       qos);
+                      qosspec_t       qs);
 
 int   ipcp_flow_alloc_resp(pid_t pid,
-                           int   port_id,
+                           int   flow_id,
                            pid_t n_pid,
                            int   response);
 
 int   ipcp_flow_dealloc(pid_t pid,
-                        int   port_id);
+                        int   flow_id);
 
 #endif /* OUROBOROS_IRMD_IPCP_H */
diff --git a/src/irmd/irm_flow.c b/src/irmd/irm_flow.c
index dfbe5e95..a0889f09 100644
--- a/src/irmd/irm_flow.c
+++ b/src/irmd/irm_flow.c
@@ -38,8 +38,8 @@
 
 struct irm_flow * irm_flow_create(pid_t     n_pid,
                                   pid_t     n_1_pid,
-                                  int       port_id,
-                                  qoscube_t qc)
+                                  int       flow_id,
+                                  qosspec_t qs)
 {
         pthread_condattr_t cattr;
         struct irm_flow *  f = malloc(sizeof(*f));
@@ -60,16 +60,16 @@ struct irm_flow * irm_flow_create(pid_t     n_pid,
 
         f->n_pid   = n_pid;
         f->n_1_pid = n_1_pid;
-        f->port_id = port_id;
-        f->qc      = qc;
+        f->flow_id = flow_id;
+        f->qs      = qs;
 
-        f->n_rb = shm_rbuff_create(n_pid, port_id);
+        f->n_rb = shm_rbuff_create(n_pid, flow_id);
         if (f->n_rb == NULL) {
                 log_err("Could not create ringbuffer for process %d.", n_pid);
                 goto fail_n_rbuff;
         }
 
-        f->n_1_rb = shm_rbuff_create(n_1_pid, port_id);
+        f->n_1_rb = shm_rbuff_create(n_1_pid, flow_id);
         if (f->n_1_rb == NULL) {
                 log_err("Could not create ringbuffer for process %d.", n_1_pid);
                 goto fail_n_1_rbuff;
diff --git a/src/irmd/irm_flow.h b/src/irmd/irm_flow.h
index d53984e8..26263107 100644
--- a/src/irmd/irm_flow.h
+++ b/src/irmd/irm_flow.h
@@ -24,8 +24,8 @@
 #define OUROBOROS_IRMD_IRM_FLOW_H
 
 #include <ouroboros/list.h>
+#include <ouroboros/qos.h>
 #include <ouroboros/shm_rbuff.h>
-#include <ouroboros/qoscube.h>
 
 #include <sys/types.h>
 #include <pthread.h>
@@ -42,12 +42,13 @@ enum flow_state {
 struct irm_flow {
         struct list_head   next;
 
-        int                port_id;
-        qoscube_t          qc;
+        int                flow_id;
 
         pid_t              n_pid;
         pid_t              n_1_pid;
 
+        qosspec_t          qs;
+
         struct shm_rbuff * n_rb;
         struct shm_rbuff * n_1_rb;
 
@@ -60,8 +61,8 @@ struct irm_flow {
 
 struct irm_flow * irm_flow_create(pid_t     n_pid,
                                   pid_t     n_1_pid,
-                                  int       port_id,
-                                  qoscube_t qc);
+                                  int       flow_id,
+                                  qosspec_t qs);
 
 void              irm_flow_destroy(struct irm_flow * f);
 
diff --git a/src/irmd/main.c b/src/irmd/main.c
index aeb43f0d..78fcf7b5 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -20,8 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
-#define _POSIX_C_SOURCE 200812L
-#define __XSI_VISIBLE   500
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200809L
+#endif
 
 #include "config.h"
 
@@ -115,12 +118,12 @@ struct {
         struct list_head     spawned_pids; /* child processes            */
         pthread_rwlock_t     reg_lock;     /* lock for registration info */
 
-        struct bmp *         port_ids;     /* port_ids for flows         */
+        struct bmp *         flow_ids;     /* flow_ids for flows         */
         struct list_head     irm_flows;    /* flow information           */
         pthread_rwlock_t     flows_lock;   /* lock for flows             */
 
         struct lockfile *    lf;           /* single irmd per system     */
-        struct shm_rdrbuff * rdrb;         /* rdrbuff for SDUs           */
+        struct shm_rdrbuff * rdrb;         /* rdrbuff for packets        */
 
         int                  sockfd;       /* UNIX socket                */
 
@@ -171,13 +174,13 @@ static void clear_irm_flow(struct irm_flow * f) {
                 shm_rdrbuff_remove(irmd.rdrb, idx);
 }
 
-static struct irm_flow * get_irm_flow(int port_id)
+static struct irm_flow * get_irm_flow(int flow_id)
 {
         struct list_head * pos = NULL;
 
         list_for_each(pos, &irmd.irm_flows) {
                 struct irm_flow * e = list_entry(pos, struct irm_flow, next);
-                if (e->port_id == port_id)
+                if (e->flow_id == flow_id)
                         return e;
         }
 
@@ -346,8 +349,10 @@ static struct ipcp_entry * get_ipcp_by_dst_name(const char * name,
                 len = IPCP_HASH_LEN(e);
 
                 hash = malloc(len);
-                if  (hash == NULL)
+                if (hash == NULL) {
+                        pthread_rwlock_unlock(&irmd.reg_lock);
                         return NULL;
+                }
 
                 str_hash(e->dir_hash_algo, hash, name);
 
@@ -825,13 +830,13 @@ static int unbind_program(char * prog,
         if (name == NULL)
                 prog_table_del(&irmd.prog_table, prog);
         else {
-                struct prog_entry * e = prog_table_get(&irmd.prog_table, prog);
-                prog_entry_del_name(e, name);
-        }
+                struct prog_entry * en = prog_table_get(&irmd.prog_table, prog);
+                prog_entry_del_name(en, name);
 
-        e = registry_get_entry(&irmd.registry, name);
-        if (e != NULL)
-                reg_entry_del_prog(e, prog);
+                e = registry_get_entry(&irmd.registry, name);
+                if (e != NULL)
+                        reg_entry_del_prog(e, prog);
+        }
 
         pthread_rwlock_unlock(&irmd.reg_lock);
 
@@ -853,13 +858,14 @@ static int unbind_process(pid_t        pid,
         if (name == NULL)
                 proc_table_del(&irmd.proc_table, pid);
         else {
-                struct proc_entry * e = proc_table_get(&irmd.proc_table, pid);
-                proc_entry_del_name(e, name);
-        }
+                struct proc_entry * en = proc_table_get(&irmd.proc_table, pid);
+                if (en != NULL)
+                        proc_entry_del_name(en, name);
 
-        e = registry_get_entry(&irmd.registry, name);
-        if (e != NULL)
-                reg_entry_del_pid(e, pid);
+                e = registry_get_entry(&irmd.registry, name);
+                if (e != NULL)
+                        reg_entry_del_pid(e, pid);
+        }
 
         pthread_rwlock_unlock(&irmd.reg_lock);
 
@@ -919,6 +925,7 @@ static ssize_t list_ipcps(ipcp_info_msg_t *** ipcps,
         return 0;
 
  fail:
+        pthread_rwlock_unlock(&irmd.reg_lock);
         while (i >= 0) {
                 free((*ipcps)[i]->layer);
                 free((*ipcps)[i]->name);
@@ -1145,7 +1152,7 @@ static int flow_accept(pid_t              pid,
 
         pid_t pid_n1;
         pid_t pid_n;
-        int   port_id;
+        int   flow_id;
         int   ret;
 
         pthread_rwlock_wrlock(&irmd.reg_lock);
@@ -1177,10 +1184,8 @@ static int flow_accept(pid_t              pid,
         if (ret == -1)
                 return -EPIPE;
 
-        if (irmd_get_state() != IRMD_RUNNING) {
-                reg_entry_set_state(re, REG_NAME_NULL);
+        if (irmd_get_state() != IRMD_RUNNING)
                 return -EIRMD;
-        }
 
         pthread_rwlock_rdlock(&irmd.flows_lock);
 
@@ -1193,7 +1198,7 @@ static int flow_accept(pid_t              pid,
 
         pid_n   = f->n_pid;
         pid_n1  = f->n_1_pid;
-        port_id = f->port_id;
+        flow_id = f->flow_id;
 
         pthread_rwlock_unlock(&irmd.flows_lock);
         pthread_rwlock_rdlock(&irmd.reg_lock);
@@ -1203,9 +1208,9 @@ static int flow_accept(pid_t              pid,
                 pthread_rwlock_unlock(&irmd.reg_lock);
                 pthread_rwlock_wrlock(&irmd.flows_lock);
                 list_del(&f->next);
-                bmp_release(irmd.port_ids, f->port_id);
+                bmp_release(irmd.flow_ids, f->flow_id);
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                ipcp_flow_alloc_resp(pid_n1, port_id, pid_n, -1);
+                ipcp_flow_alloc_resp(pid_n1, flow_id, pid_n, -1);
                 clear_irm_flow(f);
                 irm_flow_set_state(f, FLOW_NULL);
                 irm_flow_destroy(f);
@@ -1223,9 +1228,9 @@ static int flow_accept(pid_t              pid,
                 pthread_rwlock_unlock(&irmd.reg_lock);
                 pthread_rwlock_wrlock(&irmd.flows_lock);
                 list_del(&f->next);
-                bmp_release(irmd.port_ids, f->port_id);
+                bmp_release(irmd.flow_ids, f->flow_id);
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                ipcp_flow_alloc_resp(pid_n1, port_id, pid_n, -1);
+                ipcp_flow_alloc_resp(pid_n1, flow_id, pid_n, -1);
                 clear_irm_flow(f);
                 irm_flow_set_state(f, FLOW_NULL);
                 irm_flow_destroy(f);
@@ -1237,7 +1242,7 @@ static int flow_accept(pid_t              pid,
 
         pthread_rwlock_unlock(&irmd.reg_lock);
 
-        if (ipcp_flow_alloc_resp(pid_n1, port_id, pid_n, 0)) {
+        if (ipcp_flow_alloc_resp(pid_n1, flow_id, pid_n, 0)) {
                 pthread_rwlock_wrlock(&irmd.flows_lock);
                 list_del(&f->next);
                 pthread_rwlock_unlock(&irmd.flows_lock);
@@ -1250,7 +1255,7 @@ static int flow_accept(pid_t              pid,
 
         irm_flow_set_state(f, FLOW_ALLOCATED);
 
-        log_info("Flow on port_id %d allocated.", f->port_id);
+        log_info("Flow on flow_id %d allocated.", f->flow_id);
 
         *fl = f;
 
@@ -1259,13 +1264,13 @@ static int flow_accept(pid_t              pid,
 
 static int flow_alloc(pid_t              pid,
                       const char *       dst,
-                      qoscube_t          cube,
+                      qosspec_t          qs,
                       struct timespec *  timeo,
                       struct irm_flow ** e)
 {
         struct irm_flow *   f;
         struct ipcp_entry * ipcp;
-        int                 port_id;
+        int                 flow_id;
         int                 state;
         uint8_t *           hash;
 
@@ -1276,18 +1281,18 @@ static int flow_alloc(pid_t              pid,
         }
 
         pthread_rwlock_wrlock(&irmd.flows_lock);
-        port_id = bmp_allocate(irmd.port_ids);
-        if (!bmp_is_id_valid(irmd.port_ids, port_id)) {
+        flow_id = bmp_allocate(irmd.flow_ids);
+        if (!bmp_is_id_valid(irmd.flow_ids, flow_id)) {
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                log_err("Could not allocate port_id.");
+                log_err("Could not allocate flow_id.");
                 return -EBADF;
         }
 
-        f = irm_flow_create(pid, ipcp->pid, port_id, cube);
+        f = irm_flow_create(pid, ipcp->pid, flow_id, qs);
         if (f == NULL) {
-                bmp_release(irmd.port_ids, port_id);
+                bmp_release(irmd.flow_ids, flow_id);
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                log_err("Could not allocate port_id.");
+                log_err("Could not allocate flow_id.");
                 return -ENOMEM;
         }
 
@@ -1304,8 +1309,8 @@ static int flow_alloc(pid_t              pid,
 
         str_hash(ipcp->dir_hash_algo, hash, dst);
 
-        if (ipcp_flow_alloc(ipcp->pid, port_id, pid, hash,
-                            IPCP_HASH_LEN(ipcp), cube)) {
+        if (ipcp_flow_alloc(ipcp->pid, flow_id, pid, hash,
+                            IPCP_HASH_LEN(ipcp), qs)) {
                 /* sanitizer cleans this */
                 log_info("Flow_allocation failed.");
                 free(hash);
@@ -1329,13 +1334,13 @@ static int flow_alloc(pid_t              pid,
 
         *e = f;
 
-        log_info("Flow on port_id %d allocated.", port_id);
+        log_info("Flow on flow_id %d allocated.", flow_id);
 
         return 0;
 }
 
 static int flow_dealloc(pid_t pid,
-                        int   port_id)
+                        int   flow_id)
 {
         pid_t n_1_pid = -1;
         int   ret = 0;
@@ -1344,10 +1349,10 @@ static int flow_dealloc(pid_t pid,
 
         pthread_rwlock_wrlock(&irmd.flows_lock);
 
-        f = get_irm_flow(port_id);
+        f = get_irm_flow(flow_id);
         if (f == NULL) {
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                log_dbg("Deallocate unknown port %d by %d.", port_id, pid);
+                log_dbg("Deallocate unknown port %d by %d.", flow_id, pid);
                 return 0;
         }
 
@@ -1369,19 +1374,19 @@ static int flow_dealloc(pid_t pid,
                         irm_flow_set_state(f, FLOW_NULL);
                 clear_irm_flow(f);
                 irm_flow_destroy(f);
-                bmp_release(irmd.port_ids, port_id);
-                log_info("Completed deallocation of port_id %d by process %d.",
-                         port_id, pid);
+                bmp_release(irmd.flow_ids, flow_id);
+                log_info("Completed deallocation of flow_id %d by process %d.",
+                         flow_id, pid);
         } else {
                 irm_flow_set_state(f, FLOW_DEALLOC_PENDING);
-                log_dbg("Partial deallocation of port_id %d by process %d.",
-                        port_id, pid);
+                log_dbg("Partial deallocation of flow_id %d by process %d.",
+                        flow_id, pid);
         }
 
         pthread_rwlock_unlock(&irmd.flows_lock);
 
         if (n_1_pid != -1)
-                ret = ipcp_flow_dealloc(n_1_pid, port_id);
+                ret = ipcp_flow_dealloc(n_1_pid, flow_id);
 
         return ret;
 }
@@ -1413,7 +1418,7 @@ static pid_t auto_execute(char ** argv)
 
 static struct irm_flow * flow_req_arr(pid_t           pid,
                                       const uint8_t * hash,
-                                      qoscube_t       cube)
+                                      qosspec_t       qs)
 {
         struct reg_entry *  re = NULL;
         struct prog_entry * a  = NULL;
@@ -1423,7 +1428,7 @@ static struct irm_flow * flow_req_arr(pid_t           pid,
         struct pid_el *     c_pid;
         struct ipcp_entry * ipcp;
         pid_t               h_pid   = -1;
-        int                 port_id = -1;
+        int                 flow_id = -1;
 
         struct timespec wt = {IRMD_REQ_ARR_TIMEOUT / 1000,
                               (IRMD_REQ_ARR_TIMEOUT % 1000) * MILLION};
@@ -1510,17 +1515,17 @@ static struct irm_flow * flow_req_arr(pid_t           pid,
 
         pthread_rwlock_unlock(&irmd.reg_lock);
         pthread_rwlock_wrlock(&irmd.flows_lock);
-        port_id = bmp_allocate(irmd.port_ids);
-        if (!bmp_is_id_valid(irmd.port_ids, port_id)) {
+        flow_id = bmp_allocate(irmd.flow_ids);
+        if (!bmp_is_id_valid(irmd.flow_ids, flow_id)) {
                 pthread_rwlock_unlock(&irmd.flows_lock);
                 return NULL;
         }
 
-        f = irm_flow_create(h_pid, pid, port_id, cube);
+        f = irm_flow_create(h_pid, pid, flow_id, qs);
         if (f == NULL) {
-                bmp_release(irmd.port_ids, port_id);
+                bmp_release(irmd.flow_ids, flow_id);
                 pthread_rwlock_unlock(&irmd.flows_lock);
-                log_err("Could not allocate port_id.");
+                log_err("Could not allocate flow_id.");
                 return NULL;
         }
 
@@ -1536,7 +1541,7 @@ static struct irm_flow * flow_req_arr(pid_t           pid,
                 pthread_rwlock_unlock(&irmd.reg_lock);
                 pthread_rwlock_wrlock(&irmd.flows_lock);
                 clear_irm_flow(f);
-                bmp_release(irmd.port_ids, f->port_id);
+                bmp_release(irmd.flow_ids, f->flow_id);
                 list_del(&f->next);
                 pthread_rwlock_unlock(&irmd.flows_lock);
                 log_err("Could not get process table entry for %d.", h_pid);
@@ -1553,14 +1558,14 @@ static struct irm_flow * flow_req_arr(pid_t           pid,
         return f;
 }
 
-static int flow_alloc_reply(int port_id,
+static int flow_alloc_reply(int flow_id,
                             int response)
 {
         struct irm_flow * f;
 
         pthread_rwlock_rdlock(&irmd.flows_lock);
 
-        f = get_irm_flow(port_id);
+        f = get_irm_flow(flow_id);
         if (f == NULL) {
                 pthread_rwlock_unlock(&irmd.flows_lock);
                 return -1;
@@ -1626,8 +1631,8 @@ static void irm_fini(void)
 
         pthread_rwlock_wrlock(&irmd.flows_lock);
 
-        if (irmd.port_ids != NULL)
-                bmp_destroy(irmd.port_ids);
+        if (irmd.flow_ids != NULL)
+                bmp_destroy(irmd.flow_ids);
 
         list_for_each_safe(p, h, &irmd.irm_flows) {
                 struct irm_flow * f = list_entry(p, struct irm_flow, next);
@@ -1754,14 +1759,14 @@ void * irm_sanitize(void * o)
 
                 list_for_each_safe(p, h, &irmd.irm_flows) {
                         int ipcpi;
-                        int port_id;
+                        int flow_id;
                         struct irm_flow * f =
                                 list_entry(p, struct irm_flow, next);
 
                         if (irm_flow_get_state(f) == FLOW_ALLOC_PENDING
                             && ts_diff_ms(&f->t0, &now) > IRMD_FLOW_TIMEOUT) {
-                                log_dbg("Pending port_id %d timed out.",
-                                         f->port_id);
+                                log_dbg("Pending flow_id %d timed out.",
+                                         f->flow_id);
                                 f->n_pid = -1;
                                 irm_flow_set_state(f, FLOW_DEALLOC_PENDING);
                                 continue;
@@ -1771,16 +1776,16 @@ void * irm_sanitize(void * o)
                                 struct shm_flow_set * set;
                                 log_dbg("Process %d gone, deallocating "
                                         "flow %d.",
-                                         f->n_pid, f->port_id);
+                                         f->n_pid, f->flow_id);
                                 set = shm_flow_set_open(f->n_pid);
                                 if (set != NULL)
                                         shm_flow_set_destroy(set);
                                 f->n_pid = -1;
                                 irm_flow_set_state(f, FLOW_DEALLOC_PENDING);
                                 ipcpi   = f->n_1_pid;
-                                port_id = f->port_id;
+                                flow_id = f->flow_id;
                                 pthread_rwlock_unlock(&irmd.flows_lock);
-                                ipcp_flow_dealloc(ipcpi, port_id);
+                                ipcp_flow_dealloc(ipcpi, flow_id);
                                 pthread_rwlock_wrlock(&irmd.flows_lock);
                                 continue;
                         }
@@ -1788,7 +1793,7 @@ void * irm_sanitize(void * o)
                         if (kill(f->n_1_pid, 0) < 0) {
                                 struct shm_flow_set * set;
                                 log_err("IPCP %d gone, flow %d removed.",
-                                        f->n_1_pid, f->port_id);
+                                        f->n_1_pid, f->flow_id);
                                 set = shm_flow_set_open(f->n_pid);
                                 if (set != NULL)
                                         shm_flow_set_destroy(set);
@@ -1988,41 +1993,43 @@ static void * mainloop(void * o)
                 case IRM_MSG_CODE__IRM_FLOW_ACCEPT:
                         result = flow_accept(msg->pid, timeo, &e);
                         if (result == 0) {
-                                ret_msg->has_port_id = true;
-                                ret_msg->port_id     = e->port_id;
+                                qosspec_msg_t qs_msg;
+                                ret_msg->has_flow_id = true;
+                                ret_msg->flow_id     = e->flow_id;
                                 ret_msg->has_pid     = true;
                                 ret_msg->pid         = e->n_1_pid;
-                                ret_msg->has_qoscube = true;
-                                ret_msg->qoscube     = e->qc;
+                                qs_msg = spec_to_msg(&e->qs);
+                                ret_msg->qosspec     = &qs_msg;
                         }
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_ALLOC:
                         result = flow_alloc(msg->pid, msg->dst,
-                                            msg->qoscube, timeo, &e);
+                                            msg_to_spec(msg->qosspec),
+                                            timeo, &e);
                         if (result == 0) {
-                                ret_msg->has_port_id = true;
-                                ret_msg->port_id     = e->port_id;
+                                ret_msg->has_flow_id = true;
+                                ret_msg->flow_id     = e->flow_id;
                                 ret_msg->has_pid     = true;
                                 ret_msg->pid         = e->n_1_pid;
                         }
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_DEALLOC:
-                        result = flow_dealloc(msg->pid, msg->port_id);
+                        result = flow_dealloc(msg->pid, msg->flow_id);
                         break;
                 case IRM_MSG_CODE__IPCP_FLOW_REQ_ARR:
                         e = flow_req_arr(msg->pid,
                                          msg->hash.data,
-                                         msg->qoscube);
+                                         msg_to_spec(msg->qosspec));
                         result = (e == NULL ? -1 : 0);
                         if (result == 0) {
-                                ret_msg->has_port_id = true;
-                                ret_msg->port_id     = e->port_id;
+                                ret_msg->has_flow_id = true;
+                                ret_msg->flow_id     = e->flow_id;
                                 ret_msg->has_pid     = true;
                                 ret_msg->pid         = e->n_pid;
                         }
                         break;
                 case IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY:
-                        result = flow_alloc_reply(msg->port_id, msg->response);
+                        result = flow_alloc_reply(msg->flow_id, msg->response);
                         break;
                 default:
                         log_err("Don't know that message code.");
@@ -2056,6 +2063,8 @@ static void * mainloop(void * o)
 
                 irm_msg__pack(ret_msg, buffer.data);
 
+                /* Can't free the qosspec. */
+                ret_msg->qosspec = NULL;
                 irm_msg__free_unpacked(ret_msg, NULL);
 
                 pthread_cleanup_push(close_ptr, &sfd);
@@ -2134,10 +2143,10 @@ static int irm_init(void)
         list_head_init(&irmd.irm_flows);
         list_head_init(&irmd.cmds);
 
-        irmd.port_ids = bmp_create(SYS_MAX_FLOWS, 0);
-        if (irmd.port_ids == NULL) {
-                log_err("Failed to create port_ids bitmap.");
-                goto fail_port_ids;
+        irmd.flow_ids = bmp_create(SYS_MAX_FLOWS, 0);
+        if (irmd.flow_ids == NULL) {
+                log_err("Failed to create flow_ids bitmap.");
+                goto fail_flow_ids;
         }
 
         if ((irmd.lf = lockfile_create()) == NULL) {
@@ -2160,6 +2169,11 @@ static int irm_init(void)
                 }
         }
 
+        if (irmd.lf == NULL) {
+                log_err("Failed to create lockfile.");
+                goto fail_lockfile;
+        }
+
         if (stat(SOCK_PATH, &st) == -1) {
                 if (mkdir(SOCK_PATH, 0777)) {
                         log_err("Failed to create sockets directory.");
@@ -2184,11 +2198,6 @@ static int irm_init(void)
                 goto fail_sock_opt;
         }
 
-        if (irmd.lf == NULL) {
-                log_err("Failed to create lockfile.");
-                goto fail_sock_opt;
-        }
-
         if ((irmd.rdrb = shm_rdrbuff_create()) == NULL) {
                 log_err("Failed to create rdrbuff.");
                 goto fail_rdrbuff;
@@ -2207,7 +2216,7 @@ static int irm_init(void)
         gcry_control(GCRYCTL_INITIALIZATION_FINISHED);
 #endif
 
-        irmd.state   = IRMD_RUNNING;
+        irmd_set_state(IRMD_RUNNING);
 
         log_info("Ouroboros IPC Resource Manager daemon started...");
 
@@ -2226,8 +2235,8 @@ static int irm_init(void)
  fail_stat:
         lockfile_destroy(irmd.lf);
  fail_lockfile:
-        bmp_destroy(irmd.port_ids);
- fail_port_ids:
+        bmp_destroy(irmd.flow_ids);
+ fail_flow_ids:
         pthread_cond_destroy(&irmd.cmd_cond);
  fail_cmd_cond:
         pthread_mutex_destroy(&irmd.cmd_lock);
diff --git a/src/irmd/proc_table.c b/src/irmd/proc_table.c
index e8d08447..6f9d8e20 100644
--- a/src/irmd/proc_table.c
+++ b/src/irmd/proc_table.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200112L
+#endif
 
 #include "config.h"
 
@@ -168,8 +172,7 @@ void proc_entry_del_name(struct proc_entry * e,
                 struct str_el * s = list_entry(p, struct str_el, next);
                 if (!strcmp(name, s->str)) {
                         list_del(&s->next);
-                        if (s->str != NULL)
-                                free(s->str);
+                        free(s->str);
                         free(s);
                 }
         }
diff --git a/src/irmd/prog_table.c b/src/irmd/prog_table.c
index bd69e156..9aa9be9d 100644
--- a/src/irmd/prog_table.c
+++ b/src/irmd/prog_table.c
@@ -81,8 +81,7 @@ void prog_entry_destroy(struct prog_entry * e)
         list_for_each_safe(p, h, &e->names) {
                 struct str_el * s = list_entry(p, struct str_el, next);
                 list_del(&s->next);
-                if (s->str != NULL)
-                        free(s->str);
+                free(s->str);
                 free(s);
         }
 
diff --git a/src/irmd/registry.c b/src/irmd/registry.c
index 145a7452..6c86da24 100644
--- a/src/irmd/registry.c
+++ b/src/irmd/registry.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200809L
+#endif
 
 #include "config.h"
 
diff --git a/src/irmd/registry.h b/src/irmd/registry.h
index 62d90c39..c9ea8cce 100644
--- a/src/irmd/registry.h
+++ b/src/irmd/registry.h
@@ -26,7 +26,6 @@
 #include <ouroboros/hash.h>
 #include <ouroboros/ipcp.h>
 #include <ouroboros/list.h>
-#include <ouroboros/qoscube.h>
 
 #include "proc_table.h"
 #include "prog_table.h"
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 47e93d61..1c2007c3 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -6,6 +6,8 @@ include_directories(${CMAKE_BINARY_DIR}/include)
 
 protobuf_generate_c(IRM_PROTO_SRCS IRM_PROTO_HDRS irmd_messages.proto)
 protobuf_generate_c(IPCP_PROTO_SRCS IPCP_PROTO_HDRS ipcpd_messages.proto)
+protobuf_generate_c(QOSSPEC_PROTO_SRCS QOSSPEC_PROTO_HDRS
+  qosspec.proto)
 protobuf_generate_c(LAYER_CONFIG_PROTO_SRCS LAYER_CONFIG_PROTO_HDRS
   ipcp_config.proto)
 protobuf_generate_c(CACEP_PROTO_SRCS CACEP_PROTO_HDRS cacep.proto)
@@ -136,7 +138,7 @@ mark_as_advanced(LIBRT_LIBRARIES LIBPTHREAD_LIBRARIES
   LIBGCRYPT_INCLUDE_DIR SYS_RND_HDR)
 
 set(SHM_BUFFER_SIZE 4096 CACHE STRING
-    "Number of blocks in SDU buffer, must be a power of 2")
+    "Number of blocks in packet buffer, must be a power of 2")
 set(SYS_MAX_FLOWS 10240 CACHE STRING
   "Maximum number of total flows for this system")
 set(PROG_MAX_FLOWS 4096 CACHE STRING
@@ -169,11 +171,13 @@ set(SHM_FLOW_SET_PREFIX "/${SHM_PREFIX}.set." CACHE INTERNAL
 set(SHM_RDRB_NAME "/${SHM_PREFIX}.rdrb" CACHE INTERNAL
   "Name for the main POSIX shared memory buffer")
 set(SHM_RDRB_BLOCK_SIZE "sysconf(_SC_PAGESIZE)" CACHE STRING
-  "SDU buffer block size, multiple of pagesize for performance")
+  "Packet buffer block size, multiple of pagesize for performance")
 set(SHM_RDRB_MULTI_BLOCK true CACHE BOOL
-  "SDU buffer multiblock SDU support")
+  "Packet buffer multiblock packet support")
 set(SHM_RBUFF_LOCKLESS 0 CACHE BOOL
   "Enable shared memory lockless rbuff support")
+set(QOS_DISABLE_CRC 0 CACHE BOOL
+  "Ignores ber setting on all QoS cubes")
 
 set(SOURCE_FILES_DEV
   # Add source files here
@@ -213,7 +217,7 @@ configure_file("${CMAKE_CURRENT_SOURCE_DIR}/config.h.in"
   "${CMAKE_CURRENT_BINARY_DIR}/config.h" @ONLY)
 
 add_library(ouroboros-common SHARED ${SOURCE_FILES_COMMON} ${IRM_PROTO_SRCS}
-  ${IPCP_PROTO_SRCS} ${LAYER_CONFIG_PROTO_SRCS})
+  ${IPCP_PROTO_SRCS} ${LAYER_CONFIG_PROTO_SRCS} ${QOSSPEC_PROTO_SRCS})
 
 add_library(ouroboros-dev SHARED ${SOURCE_FILES_DEV} ${CACEP_PROTO_SRCS})
 
diff --git a/src/lib/cacep.c b/src/lib/cacep.c
index 6efb7295..12751078 100644
--- a/src/lib/cacep.c
+++ b/src/lib/cacep.c
@@ -32,7 +32,7 @@
 #include "cacep.pb-c.h"
 typedef CacepMsg cacep_msg_t;
 
-#define BUF_SIZE 64
+#define BUF_SIZE 128
 
 static int read_msg(int                fd,
                     struct conn_info * info)
@@ -49,6 +49,11 @@ static int read_msg(int                fd,
         if (msg == NULL)
                 return -1;
 
+        if (strlen(msg->comp_name) > CACEP_BUF_STRLEN) {
+                cacep_msg__free_unpacked(msg, NULL);
+                return -1;
+        }
+
         strcpy(info->comp_name, msg->comp_name);
         strcpy(info->protocol, msg->protocol);
 
diff --git a/src/lib/config.h.in b/src/lib/config.h.in
index 69e7f4b0..e8cfeba3 100644
--- a/src/lib/config.h.in
+++ b/src/lib/config.h.in
@@ -28,6 +28,7 @@
 
 #cmakedefine                SHM_RBUFF_LOCKLESS
 #cmakedefine                SHM_RDRB_MULTI_BLOCK
+#cmakedefine                QOS_DISABLE_CRC
 
 #define SHM_RBUFF_PREFIX    "@SHM_RBUFF_PREFIX@"
 #define SHM_LOCKFILE_NAME   "@SHM_LOCKFILE_NAME@"
diff --git a/src/lib/dev.c b/src/lib/dev.c
index e69fec26..2a5c3f83 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -20,9 +20,14 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
+#define _POSIX_C_SOURCE 200809L
+#endif
+
 #include <ouroboros/endian.h>
 
-#define _POSIX_C_SOURCE 200809L
 #include "config.h"
 
 #include <ouroboros/hash.h>
@@ -39,7 +44,6 @@
 #include <ouroboros/shm_rbuff.h>
 #include <ouroboros/utils.h>
 #include <ouroboros/fqueue.h>
-#include <ouroboros/qoscube.h>
 
 #include <stdlib.h>
 #include <string.h>
@@ -56,6 +60,8 @@
 #define NO_PART      -1
 #define DONE_PART    -2
 
+#define CRCLEN    (sizeof(uint32_t))
+
 struct flow_set {
         size_t   idx;
 };
@@ -89,9 +95,8 @@ struct flow {
         struct shm_rbuff *    rx_rb;
         struct shm_rbuff *    tx_rb;
         struct shm_flow_set * set;
-        int                   port_id;
+        int                   flow_id;
         int                   oflags;
-        qoscube_t             cube;
         qosspec_t             spec;
         ssize_t               part_idx;
 
@@ -166,12 +171,12 @@ static void port_set_state(struct port *   p,
         pthread_mutex_unlock(&p->state_lock);
 }
 
-static enum port_state port_wait_assign(int port_id)
+static enum port_state port_wait_assign(int flow_id)
 {
         enum port_state state;
         struct port *   p;
 
-        p = &ai.ports[port_id];
+        p = &ai.ports[flow_id];
 
         pthread_mutex_lock(&p->state_lock);
 
@@ -230,17 +235,16 @@ static void flow_clear(int fd)
 {
         memset(&ai.flows[fd], 0, sizeof(ai.flows[fd]));
 
-        ai.flows[fd].port_id  = -1;
+        ai.flows[fd].flow_id  = -1;
         ai.flows[fd].pid      = -1;
-        ai.flows[fd].cube     = QOS_CUBE_BE;
 }
 
 static void flow_fini(int fd)
 {
         assert(fd >= 0 && fd < SYS_MAX_FLOWS);
 
-        if (ai.flows[fd].port_id != -1) {
-                port_destroy(&ai.ports[ai.flows[fd].port_id]);
+        if (ai.flows[fd].flow_id != -1) {
+                port_destroy(&ai.ports[ai.flows[fd].flow_id]);
                 bmp_release(ai.fds, fd);
         }
 
@@ -256,7 +260,7 @@ static void flow_fini(int fd)
 
         if (ai.flows[fd].set != NULL) {
                 shm_flow_set_notify(ai.flows[fd].set,
-                                    ai.flows[fd].port_id,
+                                    ai.flows[fd].flow_id,
                                     FLOW_DEALLOC);
                 shm_flow_set_close(ai.flows[fd].set);
         }
@@ -267,9 +271,9 @@ static void flow_fini(int fd)
         flow_clear(fd);
 }
 
-static int flow_init(int       port_id,
+static int flow_init(int       flow_id,
                      pid_t     pid,
-                     qoscube_t qc)
+                     qosspec_t qs)
 {
         int fd;
         int err = -ENOMEM;
@@ -282,11 +286,11 @@ static int flow_init(int       port_id,
                 goto fail_fds;
         }
 
-        ai.flows[fd].rx_rb = shm_rbuff_open(ai.pid, port_id);
+        ai.flows[fd].rx_rb = shm_rbuff_open(ai.pid, flow_id);
         if (ai.flows[fd].rx_rb == NULL)
                 goto fail;
 
-        ai.flows[fd].tx_rb = shm_rbuff_open(pid, port_id);
+        ai.flows[fd].tx_rb = shm_rbuff_open(pid, flow_id);
         if (ai.flows[fd].tx_rb == NULL)
                 goto fail;
 
@@ -294,16 +298,15 @@ static int flow_init(int       port_id,
         if (ai.flows[fd].set == NULL)
                 goto fail;
 
-        ai.flows[fd].port_id  = port_id;
+        ai.flows[fd].flow_id  = flow_id;
         ai.flows[fd].oflags   = FLOWFDEFAULT;
         ai.flows[fd].pid      = pid;
-        ai.flows[fd].cube     = qc;
-        ai.flows[fd].spec     = qos_cube_to_spec(qc);
         ai.flows[fd].part_idx = NO_PART;
+        ai.flows[fd].spec     = qs;
 
-        ai.ports[port_id].fd = fd;
+        ai.ports[flow_id].fd = fd;
 
-        port_set_state(&ai.ports[port_id], PORT_ID_ASSIGNED);
+        port_set_state(&ai.ports[flow_id], PORT_ID_ASSIGNED);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -447,7 +450,7 @@ static void fini(void)
         pthread_rwlock_wrlock(&ai.lock);
 
         for (i = 0; i < PROG_MAX_FLOWS; ++i) {
-                if (ai.flows[i].port_id != -1) {
+                if (ai.flows[i].flow_id != -1) {
                         ssize_t idx;
                         shm_rbuff_set_acl(ai.flows[i].rx_rb, ACL_FLOWDOWN);
                         while ((idx = shm_rbuff_read(ai.flows[i].rx_rb)) >= 0)
@@ -493,7 +496,6 @@ int flow_accept(qosspec_t *             qs,
         irm_msg_t   msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg;
         int         fd;
-        qoscube_t   qc;
 
         msg.code    = IRM_MSG_CODE__IRM_FLOW_ACCEPT;
         msg.has_pid = true;
@@ -521,15 +523,14 @@ int flow_accept(qosspec_t *             qs,
                 return res;
         }
 
-        if (!recv_msg->has_pid || !recv_msg->has_port_id ||
-            !recv_msg->has_qoscube) {
+        if (!recv_msg->has_pid || !recv_msg->has_flow_id ||
+            recv_msg->qosspec == NULL) {
                 irm_msg__free_unpacked(recv_msg, NULL);
                 return -EIRMD;
         }
 
-        qc = recv_msg->qoscube;
-
-        fd = flow_init(recv_msg->port_id, recv_msg->pid, recv_msg->qoscube);
+        fd = flow_init(recv_msg->flow_id, recv_msg->pid,
+                       msg_to_spec(recv_msg->qosspec));
 
         irm_msg__free_unpacked(recv_msg, NULL);
 
@@ -538,12 +539,10 @@ int flow_accept(qosspec_t *             qs,
 
         pthread_rwlock_wrlock(&ai.lock);
 
-        /* FIXME: check if FRCT is needed based on qc? */
-
         assert(ai.flows[fd].frcti == NULL);
 
-        if (qc != QOS_CUBE_RAW) {
-                ai.flows[fd].frcti = frcti_create(fd, qc);
+        if (ai.flows[fd].spec.in_order != 0) {
+                ai.flows[fd].frcti = frcti_create(fd);
                 if (ai.flows[fd].frcti == NULL) {
                         flow_fini(fd);
                         pthread_rwlock_unlock(&ai.lock);
@@ -563,21 +562,21 @@ int flow_alloc(const char *            dst,
                qosspec_t *             qs,
                const struct timespec * timeo)
 {
-        irm_msg_t   msg      = IRM_MSG__INIT;
-        irm_msg_t * recv_msg;
-        qoscube_t   qc       = QOS_CUBE_RAW;
-        int         fd;
-
-        msg.code        = IRM_MSG_CODE__IRM_FLOW_ALLOC;
-        msg.dst         = (char *) dst;
-        msg.has_pid     = true;
-        msg.has_qoscube = true;
-        msg.pid         = ai.pid;
+        irm_msg_t     msg    = IRM_MSG__INIT;
+        qosspec_msg_t qs_msg = QOSSPEC_MSG__INIT;
+        irm_msg_t *   recv_msg;
+        int           fd;
 
+#ifdef QOS_DISABLE_CRC
         if (qs != NULL)
-                qc = qos_spec_to_cube(*qs);
-
-        msg.qoscube = qc;
+                qs->ber = 1;
+#endif
+        msg.code    = IRM_MSG_CODE__IRM_FLOW_ALLOC;
+        msg.dst     = (char *) dst;
+        msg.has_pid = true;
+        msg.pid     = ai.pid;
+        qs_msg      = spec_to_msg(qs);
+        msg.qosspec = &qs_msg;
 
         if (timeo != NULL) {
                 msg.has_timeo_sec = true;
@@ -601,12 +600,13 @@ int flow_alloc(const char *            dst,
                 return res;
         }
 
-        if (!recv_msg->has_pid || !recv_msg->has_port_id) {
+        if (!recv_msg->has_pid || !recv_msg->has_flow_id) {
                 irm_msg__free_unpacked(recv_msg, NULL);
                 return -EIRMD;
         }
 
-        fd = flow_init(recv_msg->port_id, recv_msg->pid, qc);
+        fd = flow_init(recv_msg->flow_id, recv_msg->pid,
+                       qs == NULL ? qos_raw : *qs);
 
         irm_msg__free_unpacked(recv_msg, NULL);
 
@@ -617,8 +617,8 @@ int flow_alloc(const char *            dst,
 
         assert(ai.flows[fd].frcti == NULL);
 
-        if (qc != QOS_CUBE_RAW) {
-                ai.flows[fd].frcti = frcti_create(fd, qc);
+        if (ai.flows[fd].spec.in_order != 0) {
+                ai.flows[fd].frcti = frcti_create(fd);
                 if (ai.flows[fd].frcti == NULL) {
                         flow_fini(fd);
                         pthread_rwlock_unlock(&ai.lock);
@@ -640,15 +640,15 @@ int flow_dealloc(int fd)
                 return -EINVAL;
 
         msg.code         = IRM_MSG_CODE__IRM_FLOW_DEALLOC;
-        msg.has_port_id  = true;
+        msg.has_flow_id  = true;
         msg.has_pid      = true;
         msg.pid          = ai.pid;
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        assert(ai.flows[fd].port_id >= 0);
+        assert(ai.flows[fd].flow_id >= 0);
 
-        msg.port_id = ai.flows[fd].port_id;
+        msg.flow_id = ai.flows[fd].flow_id;
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -676,7 +676,6 @@ int fccntl(int fd,
            int cmd,
            ...)
 {
-        uint16_t          sflags;
         uint32_t *        fflags;
         uint16_t *        cflags;
         va_list           l;
@@ -696,7 +695,7 @@ int fccntl(int fd,
 
         pthread_rwlock_wrlock(&ai.lock);
 
-        if (flow->port_id < 0) {
+        if (flow->flow_id < 0) {
                 pthread_rwlock_unlock(&ai.lock);
                 va_end(l);
                 return -ENOTALLOC;
@@ -768,13 +767,13 @@ int fccntl(int fd,
                         rx_acl |= ACL_FLOWDOWN;
                         tx_acl |= ACL_FLOWDOWN;
                         shm_flow_set_notify(flow->set,
-                                            flow->port_id,
+                                            flow->flow_id,
                                             FLOW_DOWN);
                 } else {
                         rx_acl &= ~ACL_FLOWDOWN;
                         tx_acl &= ~ACL_FLOWDOWN;
                         shm_flow_set_notify(flow->set,
-                                            flow->port_id,
+                                            flow->flow_id,
                                             FLOW_UP);
                 }
 
@@ -788,11 +787,6 @@ int fccntl(int fd,
                         goto einval;
                 *fflags = flow->oflags;
                 break;
-        case FRCTSFLAGS:
-                sflags = (uint16_t) va_arg(l, int);
-                if (flow->frcti == NULL || frcti_setconf(flow->frcti, sflags))
-                        goto eperm;
-                break;
         case FRCTGFLAGS:
                 cflags = (uint16_t *) va_arg(l, int *);
                 if (cflags == NULL)
@@ -824,16 +818,40 @@ int fccntl(int fd,
         return -EPERM;
 }
 
+static int chk_crc(struct shm_du_buff * sdb)
+{
+        uint32_t crc;
+        uint8_t * head = shm_du_buff_head(sdb);
+        uint8_t * tail = shm_du_buff_tail_release(sdb, CRCLEN);
+
+        mem_hash(HASH_CRC32, &crc, head, tail - head);
+
+        return !(crc == *((uint32_t *) tail));
+}
+
+static int add_crc(struct shm_du_buff * sdb)
+{
+        uint8_t * head = shm_du_buff_head(sdb);
+        uint8_t * tail = shm_du_buff_tail_alloc(sdb, CRCLEN);
+        if (tail == NULL)
+                return -1;
+
+        mem_hash(HASH_CRC32, tail, head, tail - head);
+
+        return 0;
+}
+
 ssize_t flow_write(int          fd,
                    const void * buf,
                    size_t       count)
 {
-        struct flow *     flow;
-        ssize_t           idx;
-        int               ret;
-        int               flags;
-        struct timespec   abs;
-        struct timespec * abstime = NULL;
+        struct flow *        flow;
+        ssize_t              idx;
+        int                  ret;
+        int                  flags;
+        struct timespec      abs;
+        struct timespec *    abstime = NULL;
+        struct shm_du_buff * sdb;
 
         if (buf == NULL)
                 return 0;
@@ -847,7 +865,7 @@ ssize_t flow_write(int          fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        if (flow->port_id < 0) {
+        if (flow->flow_id < 0) {
                 pthread_rwlock_unlock(&ai.lock);
                 return -ENOTALLOC;
         }
@@ -880,18 +898,25 @@ ssize_t flow_write(int          fd,
         if (idx < 0)
                 return idx;
 
-        if (frcti_snd(flow->frcti, shm_rdrbuff_get(ai.rdrb, idx)) < 0) {
+        sdb = shm_rdrbuff_get(ai.rdrb, idx);
+
+        if (frcti_snd(flow->frcti, sdb) < 0) {
+                shm_rdrbuff_remove(ai.rdrb, idx);
+                return -ENOMEM;
+        }
+
+        if (flow->spec.ber == 0 && add_crc(sdb) != 0) {
                 shm_rdrbuff_remove(ai.rdrb, idx);
                 return -ENOMEM;
         }
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        ret = shm_rbuff_write(ai.flows[fd].tx_rb, idx);
+        ret = shm_rbuff_write(flow->tx_rb, idx);
         if (ret < 0)
                 shm_rdrbuff_remove(ai.rdrb, idx);
         else
-                shm_flow_set_notify(flow->set, flow->port_id, FLOW_PKT);
+                shm_flow_set_notify(flow->set, flow->flow_id, FLOW_PKT);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -906,7 +931,7 @@ ssize_t flow_read(int    fd,
 {
         ssize_t              idx;
         ssize_t              n;
-        uint8_t *            sdu;
+        uint8_t *            packet;
         struct shm_rbuff *   rb;
         struct shm_du_buff * sdb;
         struct timespec      abs;
@@ -929,7 +954,7 @@ ssize_t flow_read(int    fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        if (flow->port_id < 0) {
+        if (flow->flow_id < 0) {
                 pthread_rwlock_unlock(&ai.lock);
                 return -ENOTALLOC;
         }
@@ -955,23 +980,25 @@ ssize_t flow_read(int    fd,
                                 if (idx < 0)
                                         return idx;
                                 sdb = shm_rdrbuff_get(ai.rdrb, idx);
+                                if (flow->spec.ber == 0  && chk_crc(sdb) != 0)
+                                        continue;
                         } while (frcti_rcv(flow->frcti, sdb) != 0);
                 }
         }
 
-        n = shm_rdrbuff_read(&sdu, ai.rdrb, idx);
+        n = shm_rdrbuff_read(&packet, ai.rdrb, idx);
 
         assert(n >= 0);
 
         if (n <= (ssize_t) count) {
-                memcpy(buf, sdu, n);
+                memcpy(buf, packet, n);
                 shm_rdrbuff_remove(ai.rdrb, idx);
                 flow->part_idx = (partrd && n == (ssize_t) count) ?
                         DONE_PART : NO_PART;
                 return n;
         } else {
                 if (partrd) {
-                        memcpy(buf, sdu, count);
+                        memcpy(buf, packet, count);
                         sdb = shm_rdrbuff_get(ai.rdrb, idx);
                         shm_du_buff_head_release(sdb, n);
                         flow->part_idx = idx;
@@ -1053,7 +1080,7 @@ int fset_add(struct flow_set * set,
              int               fd)
 {
         int    ret;
-        size_t sdus;
+        size_t packets;
         size_t i;
 
         if (set == NULL || fd < 0 || fd > SYS_MAX_FLOWS)
@@ -1061,11 +1088,11 @@ int fset_add(struct flow_set * set,
 
         pthread_rwlock_wrlock(&ai.lock);
 
-        ret = shm_flow_set_add(ai.fqset, set->idx, ai.flows[fd].port_id);
+        ret = shm_flow_set_add(ai.fqset, set->idx, ai.flows[fd].flow_id);
 
-        sdus = shm_rbuff_queued(ai.flows[fd].rx_rb);
-        for (i = 0; i < sdus; i++)
-                shm_flow_set_notify(ai.fqset, ai.flows[fd].port_id, FLOW_PKT);
+        packets = shm_rbuff_queued(ai.flows[fd].rx_rb);
+        for (i = 0; i < packets; i++)
+                shm_flow_set_notify(ai.fqset, ai.flows[fd].flow_id, FLOW_PKT);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1080,8 +1107,8 @@ void fset_del(struct flow_set * set,
 
         pthread_rwlock_wrlock(&ai.lock);
 
-        if (ai.flows[fd].port_id >= 0)
-                shm_flow_set_del(ai.fqset, set->idx, ai.flows[fd].port_id);
+        if (ai.flows[fd].flow_id >= 0)
+                shm_flow_set_del(ai.fqset, set->idx, ai.flows[fd].flow_id);
 
         pthread_rwlock_unlock(&ai.lock);
 }
@@ -1096,12 +1123,12 @@ bool fset_has(const struct flow_set * set,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        if (ai.flows[fd].port_id < 0) {
+        if (ai.flows[fd].flow_id < 0) {
                 pthread_rwlock_unlock(&ai.lock);
                 return false;
         }
 
-        ret = (shm_flow_set_has(ai.fqset, set->idx, ai.flows[fd].port_id) == 1);
+        ret = (shm_flow_set_has(ai.fqset, set->idx, ai.flows[fd].flow_id) == 1);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1177,35 +1204,35 @@ int fevent(struct flow_set *       set,
 /* ipcp-dev functions. */
 
 int np1_flow_alloc(pid_t     n_pid,
-                   int       port_id,
-                   qoscube_t qc)
+                   int       flow_id,
+                   qosspec_t qs)
 {
-        return flow_init(port_id, n_pid, qc);
+        return flow_init(flow_id, n_pid, qs);
 }
 
-int np1_flow_dealloc(int port_id)
+int np1_flow_dealloc(int flow_id)
 {
         int fd;
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        fd = ai.ports[port_id].fd;
+        fd = ai.ports[flow_id].fd;
 
         pthread_rwlock_unlock(&ai.lock);
 
         return fd;
 }
 
-int np1_flow_resp(int port_id)
+int np1_flow_resp(int flow_id)
 {
         int fd;
 
-        if (port_wait_assign(port_id) != PORT_ID_ASSIGNED)
+        if (port_wait_assign(flow_id) != PORT_ID_ASSIGNED)
                 return -1;
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        fd = ai.ports[port_id].fd;
+        fd = ai.ports[flow_id].fd;
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1243,29 +1270,29 @@ int ipcp_create_r(pid_t pid,
 int ipcp_flow_req_arr(pid_t           pid,
                       const uint8_t * dst,
                       size_t          len,
-                      qoscube_t       qc)
+                      qosspec_t       qs)
 {
-        irm_msg_t   msg = IRM_MSG__INIT;
-        irm_msg_t * recv_msg;
-        int         fd;
+        irm_msg_t     msg = IRM_MSG__INIT;
+        irm_msg_t *   recv_msg;
+        qosspec_msg_t qs_msg;
+        int           fd;
 
         assert(dst != NULL);
 
-        msg.code        = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
-        msg.has_pid     = true;
-        msg.pid         = pid;
-        msg.has_hash    = true;
-        msg.hash.len    = len;
-        msg.hash.data   = (uint8_t *) dst;
-        msg.has_qoscube = true;
-        msg.qoscube     = qc;
+        msg.code      = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
+        msg.has_pid   = true;
+        msg.pid       = pid;
+        msg.has_hash  = true;
+        msg.hash.len  = len;
+        msg.hash.data = (uint8_t *) dst;
+        qs_msg        = spec_to_msg(&qs);
+        msg.qosspec   = &qs_msg;
 
         recv_msg = send_recv_irm_msg(&msg);
-
         if (recv_msg == NULL)
                 return -EIRMD;
 
-        if (!recv_msg->has_port_id || !recv_msg->has_pid) {
+        if (!recv_msg->has_flow_id || !recv_msg->has_pid) {
                 irm_msg__free_unpacked(recv_msg, NULL);
                 return -1;
         }
@@ -1275,7 +1302,7 @@ int ipcp_flow_req_arr(pid_t           pid,
                 return -1;
         }
 
-        fd = flow_init(recv_msg->port_id, recv_msg->pid, qc);
+        fd = flow_init(recv_msg->flow_id, recv_msg->pid, qs);
 
         irm_msg__free_unpacked(recv_msg, NULL);
 
@@ -1292,11 +1319,11 @@ int ipcp_flow_alloc_reply(int fd,
         assert(fd >= 0 && fd < SYS_MAX_FLOWS);
 
         msg.code         = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
-        msg.has_port_id  = true;
+        msg.has_flow_id  = true;
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        msg.port_id = ai.flows[fd].port_id;
+        msg.flow_id = ai.flows[fd].flow_id;
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1333,7 +1360,7 @@ int ipcp_flow_read(int                   fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        assert(flow->port_id >= 0);
+        assert(flow->flow_id >= 0);
 
         rb = flow->rx_rb;
 
@@ -1352,6 +1379,8 @@ int ipcp_flow_read(int                   fd,
                 if (idx < 0)
                         return idx;
                 *sdb = shm_rdrbuff_get(ai.rdrb, idx);
+                if (flow->spec.ber == 0 && chk_crc(*sdb) != 0)
+                        continue;
         } while (frcti_rcv(flow->frcti, *sdb) != 0);
 
         return 0;
@@ -1371,7 +1400,7 @@ int ipcp_flow_write(int                  fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        assert(flow->port_id >= 0);
+        assert(flow->flow_id >= 0);
 
         if ((flow->oflags & FLOWFACCMODE) == FLOWFRDONLY) {
                 pthread_rwlock_unlock(&ai.lock);
@@ -1387,9 +1416,15 @@ int ipcp_flow_write(int                  fd,
                 return -ENOMEM;
         }
 
+        if (flow->spec.ber == 0 && add_crc(sdb) != 0) {
+                pthread_rwlock_unlock(&ai.lock);
+                shm_rdrbuff_remove(ai.rdrb, idx);
+                return -ENOMEM;
+        }
+
         ret = shm_rbuff_write(flow->tx_rb, idx);
         if (ret == 0)
-                shm_flow_set_notify(flow->set, flow->port_id, FLOW_PKT);
+                shm_flow_set_notify(flow->set, flow->flow_id, FLOW_PKT);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1435,7 +1470,7 @@ void ipcp_flow_fini(int fd)
         shm_rbuff_set_acl(ai.flows[fd].tx_rb, ACL_FLOWDOWN);
 
         shm_flow_set_notify(ai.flows[fd].set,
-                            ai.flows[fd].port_id,
+                            ai.flows[fd].flow_id,
                             FLOW_DEALLOC);
 
         rx_rb = ai.flows[fd].rx_rb;
@@ -1455,9 +1490,9 @@ int ipcp_flow_get_qoscube(int         fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        assert(ai.flows[fd].port_id >= 0);
+        assert(ai.flows[fd].flow_id >= 0);
 
-        *cube = ai.flows[fd].cube;
+        *cube = qos_spec_to_cube(ai.flows[fd].spec);
 
         pthread_rwlock_unlock(&ai.lock);
 
@@ -1491,14 +1526,14 @@ int local_flow_write(int    fd,
 
         pthread_rwlock_rdlock(&ai.lock);
 
-        if (flow->port_id < 0) {
+        if (flow->flow_id < 0) {
                 pthread_rwlock_unlock(&ai.lock);
                 return -ENOTALLOC;
         }
 
         ret = shm_rbuff_write(flow->tx_rb, idx);
         if (ret == 0)
-                shm_flow_set_notify(flow->set, flow->port_id, FLOW_PKT);
+                shm_flow_set_notify(flow->set, flow->flow_id, FLOW_PKT);
 
         pthread_rwlock_unlock(&ai.lock);
 
diff --git a/src/lib/frct.c b/src/lib/frct.c
index 0f3173c5..db3572e3 100644
--- a/src/lib/frct.c
+++ b/src/lib/frct.c
@@ -31,16 +31,13 @@
 #define TW_RESOLUTION  1     /* ms */
 
 #define FRCT_PCILEN    (sizeof(struct frct_pci))
-#define FRCT_CRCLEN    (sizeof(uint32_t))
 
 struct frct_cr {
-        bool     drf;
         uint32_t lwe;
         uint32_t rwe;
 
-        uint32_t seqno;
-        bool     conf;
         uint8_t  cflags;
+        uint32_t seqno;
 
         time_t   rto;     /* ms */
         time_t   act;     /* s */
@@ -67,15 +64,12 @@ enum frct_flags {
         FRCT_ACK  = 0x03, /* ACK field valid  */
         FRCT_FC   = 0x08, /* FC window valid  */
         FRCT_RDVZ = 0x10, /* Rendez-vous      */
-        FRCT_CFG  = 0x20, /* Configuration    */
-        FRCT_MFGM = 0x40, /* More fragments   */
-        FRCT_CRC  = 0x80, /* CRC present      */
+        FRCT_MFGM = 0x20, /* More fragments   */
+        FRCT_CRC  = 0x40, /* CRC present      */
 };
 
 struct frct_pci {
-        uint8_t  flags;
-
-        uint8_t  cflags;
+        uint16_t flags;
 
         uint16_t window;
 
@@ -85,8 +79,7 @@ struct frct_pci {
 
 #include <rxmwheel.c>
 
-static struct frcti * frcti_create(int       fd,
-                                   qoscube_t qc)
+static struct frcti * frcti_create(int fd)
 {
         struct frcti *  frcti;
         time_t          delta_t;
@@ -114,16 +107,15 @@ static struct frcti * frcti_create(int       fd,
 
         delta_t = (frcti->mpl + frcti->a + frcti->r) / 1000;
 
-        if (qc == QOS_CUBE_DATA)
-                frcti->snd_cr.cflags |= FRCTFRTX;
-
-        frcti->snd_cr.conf   = true;
-        frcti->snd_cr.inact  = 3 * delta_t + 1;
+        frcti->snd_cr.inact  = 3 * delta_t;
         frcti->snd_cr.act    = now.tv_sec - (frcti->snd_cr.inact + 1);
         /* Initial rto. FIXME: recalc using Karn algorithm. */
         frcti->snd_cr.rto    = 120;
 
-        frcti->rcv_cr.inact  = 2 * delta_t + 1;
+        if (ai.flows[fd].spec.loss == 0)
+                frcti->snd_cr.cflags |= FRCTFRTX;
+
+        frcti->rcv_cr.inact  = 2 * delta_t;
         frcti->rcv_cr.act    = now.tv_sec - (frcti->rcv_cr.inact + 1);
 
         return frcti;
@@ -138,7 +130,7 @@ static void frcti_destroy(struct frcti * frcti)
 {
         /*
          * FIXME: In case of reliable transmission we should
-         * make sure everything is acked.
+         * make sure everything we sent is acked.
          */
 
         rxmwheel_clear(frcti->fd);
@@ -148,24 +140,6 @@ static void frcti_destroy(struct frcti * frcti)
         free(frcti);
 }
 
-static int frcti_setconf(struct frcti * frcti,
-                         uint16_t       flags)
-{
-        assert(frcti);
-
-        pthread_rwlock_wrlock(&frcti->lock);
-
-        if (frcti->snd_cr.cflags != flags) {
-                frcti->snd_cr.cflags = flags;
-                frcti->snd_cr.conf   = true;
-                frcti->snd_cr.drf    = true;
-        }
-
-        pthread_rwlock_unlock(&frcti->lock);
-
-        return 0;
-}
-
 static uint16_t frcti_getconf(struct frcti * frcti)
 {
         uint16_t ret;
@@ -203,14 +177,6 @@ static ssize_t __frcti_queued_pdu(struct frcti * frcti)
         pos = frcti->rcv_cr.lwe & (RQ_SIZE - 1);
         idx = frcti->rq[pos];
         if (idx != -1) {
-                struct shm_du_buff * sdb;
-                struct frct_pci *    pci;
-
-                sdb = shm_rdrbuff_get(ai.rdrb, idx);
-                pci = (struct frct_pci *) shm_du_buff_head(sdb) - 1;
-                if (pci->flags & FRCT_CFG)
-                        frcti->rcv_cr.cflags = pci->cflags;
-
                 ++frcti->rcv_cr.lwe;
                 frcti->rq[pos] = -1;
         }
@@ -220,22 +186,6 @@ static ssize_t __frcti_queued_pdu(struct frcti * frcti)
         return idx;
 }
 
-static int frct_chk_crc(uint8_t * head,
-                        uint8_t * tail)
-{
-        uint32_t crc;
-
-        mem_hash(HASH_CRC32, &crc, head, tail - head);
-
-        return crc == *((uint32_t *) tail);
-}
-
-static void frct_add_crc(uint8_t * head,
-                         uint8_t * tail)
-{
-        mem_hash(HASH_CRC32, tail, head, tail - head);
-}
-
 static struct frct_pci * frcti_alloc_head(struct shm_du_buff * sdb)
 {
         struct frct_pci * pci;
@@ -272,38 +222,20 @@ static int __frcti_snd(struct frcti *       frcti,
 
         pci->flags |= FRCT_DATA;
 
-        if (snd_cr->cflags & FRCTFERRCHCK) {
-                uint8_t * tail = shm_du_buff_tail_alloc(sdb, FRCT_CRCLEN);
-                if (tail == NULL) {
-                        pthread_rwlock_unlock(&frcti->lock);
-                        return -1;
-                }
-
-                frct_add_crc((uint8_t *) pci, tail);
-
-                pci->flags |= FRCT_CRC;
-        }
-
         /* Set DRF if there are no unacknowledged packets. */
         if (snd_cr->seqno == snd_cr->lwe)
                 pci->flags |= FRCT_DRF;
 
-        if (snd_cr->conf) {
-                /* FIXME: This packet must be acked! */
-                pci->flags |= FRCT_CFG;
-                pci->cflags = snd_cr->cflags;
-        }
-
         /* Choose a new sequence number if sender inactivity expired. */
         if (now.tv_sec - snd_cr->act > snd_cr->inact) {
                 /* There are no unacknowledged packets. */
                 assert(snd_cr->seqno == snd_cr->lwe);
 #ifdef CONFIG_OUROBOROS_DEBUG
-                frcti->snd_cr.seqno = 0;
+                snd_cr->seqno = 0;
 #else
                 random_buffer(&snd_cr->seqno, sizeof(snd_cr->seqno));
 #endif
-                frcti->snd_cr.lwe = frcti->snd_cr.seqno;
+                frcti->snd_cr.lwe = snd_cr->seqno;
         }
 
         pci->seqno = hton32(snd_cr->seqno);
@@ -317,14 +249,13 @@ static int __frcti_snd(struct frcti *       frcti,
 
         snd_cr->seqno++;
         snd_cr->act  = now.tv_sec;
-        snd_cr->conf = false;
 
         pthread_rwlock_unlock(&frcti->lock);
 
         return 0;
 }
 
-/* Returns 0 when idx contains an SDU for the application. */
+/* Returns 0 when idx contains a packet for the application. */
 static int __frcti_rcv(struct frcti *       frcti,
                        struct shm_du_buff * sdb)
 {
@@ -349,43 +280,33 @@ static int __frcti_rcv(struct frcti *       frcti,
 
         idx = shm_du_buff_get_idx(sdb);
 
-        /* PDU may be corrupted. */
-        if (pci->flags & FRCT_CRC) {
-                uint8_t * tail = shm_du_buff_tail_release(sdb, FRCT_CRCLEN);
-                if (frct_chk_crc((uint8_t *) pci, tail))
-                        goto drop_packet;
-        }
-
         seqno = ntoh32(pci->seqno);
 
         /* Check if receiver inactivity is true. */
         if (now.tv_sec - rcv_cr->act > rcv_cr->inact) {
                 /* Inactive receiver, check for DRF. */
                 if (pci->flags & FRCT_DRF) /* New run. */
-                        rcv_cr->lwe = seqno - 1;
+                        rcv_cr->seqno = seqno;
                 else
                         goto drop_packet;
         }
 
-        if (seqno == rcv_cr->lwe + 1) {
-                rcv_cr->lwe = seqno;
-                /* Check for online reconfiguration. */
-                if (pci->flags & FRCT_CFG)
-                        rcv_cr->cflags = pci->cflags;
+        if (seqno == rcv_cr->seqno) {
+                ++rcv_cr->seqno;
         } else { /* Out of order. */
-                if ((int32_t)(seqno - rcv_cr->lwe) <= 0) /* Duplicate. */
+                if ((int32_t)(seqno - rcv_cr->seqno) < 0) /* Duplicate. */
                         goto drop_packet;
 
                 if (rcv_cr->cflags & FRCTFRTX) {
                         size_t pos = seqno & (RQ_SIZE - 1);
-                        if ((seqno - rcv_cr->lwe) > RQ_SIZE /* Out of rq. */
+                        if ((seqno - rcv_cr->seqno) > RQ_SIZE /* Out of rq. */
                             || frcti->rq[pos] != -1) /* Duplicate in rq. */
                                 goto drop_packet;
                         /* Queue. */
                         frcti->rq[pos] = idx;
                         ret = -EAGAIN;
                 } else {
-                        rcv_cr->lwe = seqno;
+                        rcv_cr->seqno = seqno;
                 }
         }
 
@@ -398,18 +319,18 @@ static int __frcti_rcv(struct frcti *       frcti,
 
         rcv_cr->act = now.tv_sec;
 
+        pthread_rwlock_unlock(&frcti->lock);
+
         if (!(pci->flags & FRCT_DATA))
                 shm_rdrbuff_remove(ai.rdrb, idx);
 
-        pthread_rwlock_unlock(&frcti->lock);
-
         rxmwheel_move();
 
         return ret;
 
  drop_packet:
-        shm_rdrbuff_remove(ai.rdrb, idx);
         pthread_rwlock_unlock(&frcti->lock);
+        shm_rdrbuff_remove(ai.rdrb, idx);
         rxmwheel_move();
         return -EAGAIN;
 }
diff --git a/src/lib/hash.c b/src/lib/hash.c
index 9b74967b..10e10c13 100644
--- a/src/lib/hash.c
+++ b/src/lib/hash.c
@@ -23,6 +23,10 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#endif
+
 #include "config.h"
 
 #include <ouroboros/hash.h>
diff --git a/src/lib/hashtable.c b/src/lib/hashtable.c
index be5c3ffd..68a0f545 100644
--- a/src/lib/hashtable.c
+++ b/src/lib/hashtable.c
@@ -20,6 +20,10 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#endif
+
 #include <ouroboros/hashtable.h>
 #include <ouroboros/list.h>
 #include <ouroboros/errno.h>
diff --git a/src/lib/ipcpd_messages.proto b/src/lib/ipcpd_messages.proto
index 454af0dc..ae1014ac 100644
--- a/src/lib/ipcpd_messages.proto
+++ b/src/lib/ipcpd_messages.proto
@@ -23,6 +23,7 @@
 syntax = "proto2";
 
 import "ipcp_config.proto";
+import "qosspec.proto";
 
 enum ipcp_msg_code {
         IPCP_BOOTSTRAP       =  1;
@@ -41,9 +42,9 @@ enum ipcp_msg_code {
 message ipcp_msg {
         required ipcp_msg_code code        =  1;
         optional bytes hash                =  2;
-        optional int32 port_id             =  3;
+        optional int32 flow_id             =  3;
         optional string dst                =  4;
-        optional uint32 qoscube            =  5;
+        optional qosspec_msg qosspec       =  5;
         optional ipcp_config_msg conf      =  6;
         optional int32 pid                 =  7;
         optional layer_info_msg layer_info =  8;
diff --git a/src/lib/irm.c b/src/lib/irm.c
index 6a9f837e..d88475c4 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -20,7 +20,11 @@
  * Foundation, Inc., http://www.fsf.org/about/contact/.
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#else
 #define _POSIX_C_SOURCE 200809L
+#endif
 
 #include <ouroboros/errno.h>
 #include <ouroboros/hash.h>
@@ -315,10 +319,10 @@ static int check_prog(const char * prog)
 
 static int check_prog_path(char ** prog)
 {
-        char * path = getenv("PATH");
-        char * path_end = path + strlen(path) + 1;
+        char * path;
+        char * path_end;
         char * pstart;
-        char * pstop = path;
+        char * pstop;
         char * tmp;
         char * tstop;
         char * tstart;
@@ -327,9 +331,15 @@ static int check_prog_path(char ** prog)
 
         assert(prog);
 
-        if (*prog == NULL || path == NULL)
+        if (*prog == NULL)
                 return -EINVAL;
 
+        path = getenv("PATH");
+        if (path == NULL)
+                return -ENOENT;
+
+        pstop = path;
+        path_end = path + strlen(path) + 1;
         if (!strlen(path) || strchr(*prog, '/') != NULL) {
                 if ((ret = check_prog(*prog)) < 0)
                         return ret;
diff --git a/src/lib/irmd_messages.proto b/src/lib/irmd_messages.proto
index 16dfe828..351b4a8e 100644
--- a/src/lib/irmd_messages.proto
+++ b/src/lib/irmd_messages.proto
@@ -23,6 +23,7 @@
 syntax = "proto2";
 
 import "ipcp_config.proto";
+import "qosspec.proto";
 
 enum irm_msg_code {
         IRM_CREATE_IPCP       =  1;
@@ -66,8 +67,8 @@ message irm_msg {
         optional sint32 response      =  8;
         optional string dst           =  9;
         optional bytes  hash          = 10;
-        optional sint32 port_id       = 11;
-        optional sint32 qoscube       = 12;
+        optional sint32 flow_id       = 11;
+        optional qosspec_msg qosspec  = 12;
         optional ipcp_config_msg conf = 13;
         optional uint32 opts          = 14;
         repeated ipcp_info_msg ipcps  = 15;
diff --git a/src/lib/md5.c b/src/lib/md5.c
index 6f2b2e36..959865fe 100644
--- a/src/lib/md5.c
+++ b/src/lib/md5.c
@@ -40,6 +40,10 @@
  * or FITNESS FOR A PARTICULAR PURPOSE.  Use this program  at  your own risk!
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#endif
+
 #include <ouroboros/endian.h>
 #include <ouroboros/md5.h>
 
diff --git a/src/lib/qos.c b/src/lib/qos.c
index bee6ed71..8607031e 100644
--- a/src/lib/qos.c
+++ b/src/lib/qos.c
@@ -28,66 +28,61 @@
 #include <string.h>
 
 qosspec_t qos_raw = {
-        .delay                = UINT32_MAX,
-        .bandwidth            = 0,
-        .availability         = 0,
-        .loss                 = 1,
-        .in_order             = 0,
-        .maximum_interruption = UINT32_MAX
+        .delay        = UINT32_MAX,
+        .bandwidth    = 0,
+        .availability = 0,
+        .loss         = 1,
+        .ber          = 1,
+        .in_order     = 0,
+        .max_gap      = UINT32_MAX
+};
+
+qosspec_t qos_raw_no_errors = {
+        .delay        = UINT32_MAX,
+        .bandwidth    = 0,
+        .availability = 0,
+        .loss         = 1,
+        .ber          = 0,
+        .in_order     = 0,
+        .max_gap      = UINT32_MAX
 };
 
 qosspec_t qos_best_effort = {
-        .delay                = UINT32_MAX,
-        .bandwidth            = 0,
-        .availability         = 0,
-        .loss                 = 1,
-        .in_order             = 1,
-        .maximum_interruption = UINT32_MAX
+        .delay        = UINT32_MAX,
+        .bandwidth    = 0,
+        .availability = 0,
+        .loss         = 1,
+        .ber          = 0,
+        .in_order     = 1,
+        .max_gap      = UINT32_MAX
 };
 
-qosspec_t qos_video = {
-        .delay                = 100,
-        .bandwidth            = UINT64_MAX,
-        .availability         = 3,
-        .loss                 = 1,
-        .in_order             = 1,
-        .maximum_interruption = 100
+qosspec_t qos_video   = {
+        .delay        = 100,
+        .bandwidth    = UINT64_MAX,
+        .availability = 3,
+        .loss         = 1,
+        .ber          = 0,
+        .in_order     = 1,
+        .max_gap      = 100
 };
 
 qosspec_t qos_voice = {
-        .delay                = 50,
-        .bandwidth            = 100000,
-        .availability         = 5,
-        .loss                 = 1,
-        .in_order             = 1,
-        .maximum_interruption = 50
+        .delay        = 50,
+        .bandwidth    = 100000,
+        .availability = 5,
+        .loss         = 1,
+        .ber          = 0,
+        .in_order     = 1,
+        .max_gap      = 50
 };
 
 qosspec_t qos_data = {
-        .delay                = 1000,
-        .bandwidth            = 0,
-        .availability         = 0,
-        .in_order             = 1,
-        .loss                 = 0,
-        .maximum_interruption = 2000
+        .delay        = 1000,
+        .bandwidth    = 0,
+        .availability = 0,
+        .loss         = 0,
+        .ber          = 0,
+        .in_order     = 1,
+        .max_gap      = 2000
 };
-
-int qosspec_init(qosspec_t * qs)
-{
-        if (qs == NULL)
-                return -EINVAL;
-
-        *qs = qos_best_effort;
-
-        return 0;
-}
-
-int qosspec_fini(qosspec_t * qs)
-{
-        if (qs == NULL)
-                return -EINVAL;
-
-        memset(qs, 0, sizeof(*qs));
-
-        return 0;
-}
diff --git a/src/lib/qoscube.c b/src/lib/qoscube.c
index 5dfa35ad..efca0e42 100644
--- a/src/lib/qoscube.c
+++ b/src/lib/qoscube.c
@@ -25,38 +25,20 @@
 
 #include <string.h>
 
+
+
 qoscube_t qos_spec_to_cube(qosspec_t qs)
 {
-        if (qs.loss == 0)
-                return QOS_CUBE_DATA;
-        else if (qs.delay <= qos_voice.delay &&
+        if (qs.delay <= qos_voice.delay &&
             qs.bandwidth <= qos_voice.bandwidth &&
             qs.availability >= qos_voice.availability &&
-            qs.maximum_interruption <= qos_voice.maximum_interruption)
+            qs.max_gap <= qos_voice.max_gap)
                 return QOS_CUBE_VOICE;
         else if (qs.delay <= qos_video.delay &&
                  qs.bandwidth <= qos_video.bandwidth &&
                  qs.availability >= qos_video.availability &&
-                 qs.maximum_interruption <= qos_video.maximum_interruption)
+                 qs.max_gap <= qos_video.max_gap)
                 return QOS_CUBE_VIDEO;
-        else if (qs.in_order == 1)
-                return QOS_CUBE_BE;
         else
-                return QOS_CUBE_RAW;
-}
-
-qosspec_t qos_cube_to_spec(qoscube_t qc)
-{
-        switch (qc) {
-        case QOS_CUBE_VOICE:
-                return qos_voice;
-        case QOS_CUBE_VIDEO:
-                return qos_video;
-        case QOS_CUBE_BE:
-                return qos_best_effort;
-        case QOS_CUBE_DATA:
-                return qos_data;
-        default:
-                return qos_raw;
-        }
+                return QOS_CUBE_BE;
 }
diff --git a/src/lib/qosspec.proto b/src/lib/qosspec.proto
new file mode 100644
index 00000000..f355e345
--- /dev/null
+++ b/src/lib/qosspec.proto
@@ -0,0 +1,33 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2018
+ *
+ * QoS specification message
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+syntax = "proto2";
+
+message qosspec_msg {
+        required uint32 delay        = 1; /* In ms */
+        required uint64 bandwidth    = 2; /* In bits/s */
+        required uint32 availability = 3; /* Class of 9s */
+        required uint32 loss         = 4; /* Packet loss */
+        required uint32 ber          = 5; /* Bit error rate, ppb */
+        required uint32 in_order     = 6; /* In-order delivery */
+        required uint32 max_gap      = 7; /* In ms */
+};
diff --git a/src/lib/rib.c b/src/lib/rib.c
index 685575e5..88db9ed8 100644
--- a/src/lib/rib.c
+++ b/src/lib/rib.c
@@ -101,6 +101,9 @@ static int rib_read(const char *            path,
         char               comp[RIB_PATH_LEN + 1];
         char *             c;
 
+        if (strlen(path) > RIB_PATH_LEN)
+                return -1;
+
         strcpy(comp, path + 1);
 
         c = strstr(comp, "/");
@@ -183,6 +186,9 @@ static size_t __getattr(const char *  path,
         char               comp[RIB_PATH_LEN + 1];
         char *             c;
 
+        if (strlen(path) > RIB_PATH_LEN)
+                return -1;
+
         strcpy(comp, path + 1);
 
         c = strstr(comp, "/");
@@ -282,7 +288,8 @@ int rib_init(const char * mountpt)
         if (stat(rib.mnt, &st) == -1)
                 switch(errno) {
                 case ENOENT:
-                        mkdir(rib.mnt, 0777);
+                        if (mkdir(rib.mnt, 0777))
+                                return -1;
                         break;
                 case ENOTCONN:
                         fuse_unmount(rib.mnt, rib.ch);
@@ -385,6 +392,12 @@ int rib_reg(const char *     path,
                 return -ENOMEM;
         }
 
+        if (strlen(path) > RIB_PATH_LEN) {
+                pthread_rwlock_unlock(&rib.lock);
+                free(rc);
+                return -1;
+        }
+
         strcpy(rc->path, path);
         rc->ops = ops;
 
diff --git a/src/lib/rxmwheel.c b/src/lib/rxmwheel.c
index e5891081..697c6a48 100644
--- a/src/lib/rxmwheel.c
+++ b/src/lib/rxmwheel.c
@@ -192,7 +192,7 @@ static int rxmwheel_move(void)
                                 continue;
                         }
 
-                        shm_flow_set_notify(f->set, f->port_id, FLOW_PKT);
+                        shm_flow_set_notify(f->set, f->flow_id, FLOW_PKT);
 
                         /* Reschedule. */
                         shm_du_buff_wait_ack(sdb);
diff --git a/src/lib/sha3.c b/src/lib/sha3.c
index 6179af22..f6a82c57 100644
--- a/src/lib/sha3.c
+++ b/src/lib/sha3.c
@@ -42,6 +42,10 @@
  * or FITNESS FOR A PARTICULAR PURPOSE.  Use this program  at  your own risk!
  */
 
+#if defined(__linux__) || defined(__CYGWIN__)
+#define _DEFAULT_SOURCE
+#endif
+
 #include <ouroboros/endian.h>
 #include <ouroboros/sha3.h>
 
diff --git a/src/lib/shm_flow_set.c b/src/lib/shm_flow_set.c
index bb9e3caa..1c94c599 100644
--- a/src/lib/shm_flow_set.c
+++ b/src/lib/shm_flow_set.c
@@ -64,7 +64,7 @@
 #define fqueue_ptr(fs, idx) (fs->fqueues + (SHM_BUFFER_SIZE) * idx)
 
 struct portevent {
-        int port_id;
+        int flow_id;
         int event;
 };
 
@@ -98,17 +98,14 @@ struct shm_flow_set * shm_flow_set_create()
         mask = umask(0);
 
         shm_fd = shm_open(fn, O_CREAT | O_RDWR, 0666);
-        if (shm_fd == -1) {
-                free(set);
-                return NULL;
-        }
+        if (shm_fd == -1)
+                goto fail_shm_open;
 
         umask(mask);
 
         if (ftruncate(shm_fd, SHM_FLOW_SET_FILE_SIZE - 1) < 0) {
-                free(set);
                 close(shm_fd);
-                return NULL;
+                goto fail_shm_open;
         }
 
         shm_base = mmap(NULL,
@@ -120,11 +117,8 @@ struct shm_flow_set * shm_flow_set_create()
 
         close(shm_fd);
 
-        if (shm_base == MAP_FAILED) {
-                shm_unlink(fn);
-                free(set);
-                return NULL;
-        }
+        if (shm_base == MAP_FAILED)
+                goto fail_mmap;
 
         set->mtable  = shm_base;
         set->heads   = (size_t *) (set->mtable + SYS_MAX_FLOWS);
@@ -133,21 +127,27 @@ struct shm_flow_set * shm_flow_set_create()
         set->lock    = (pthread_mutex_t *)
                 (set->fqueues + PROG_MAX_FQUEUES * (SHM_BUFFER_SIZE));
 
-        pthread_mutexattr_init(&mattr);
+        if (pthread_mutexattr_init(&mattr))
+                goto fail_mmap;
+
 #ifdef HAVE_ROBUST_MUTEX
-        pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST);
+        if (pthread_mutexattr_setrobust(&mattr, PTHREAD_MUTEX_ROBUST))
+                goto fail_mmap;
 #endif
-        pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED);
-        pthread_mutex_init(set->lock, &mattr);
+        if (pthread_mutexattr_setpshared(&mattr, PTHREAD_PROCESS_SHARED) ||
+            pthread_mutex_init(set->lock, &mattr) ||
+            pthread_condattr_init(&cattr) ||
+            pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED))
+                goto fail_mmap;
 
-        pthread_condattr_init(&cattr);
-        pthread_condattr_setpshared(&cattr, PTHREAD_PROCESS_SHARED);
 #ifndef __APPLE__
-        pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+        if (pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK))
+                goto fail_mmap;
 #endif
         for (i = 0; i < PROG_MAX_FQUEUES; ++i) {
                 set->heads[i] = 0;
-                pthread_cond_init(&set->conds[i], &cattr);
+                if (pthread_cond_init(&set->conds[i], &cattr))
+                        goto fail_mmap;
         }
 
         for (i = 0; i < SYS_MAX_FLOWS; ++i)
@@ -156,6 +156,12 @@ struct shm_flow_set * shm_flow_set_create()
         set->pid = getpid();
 
         return set;
+
+ fail_mmap:
+        shm_unlink(fn);
+ fail_shm_open:
+        free(set);
+        return NULL;
 }
 
 struct shm_flow_set * shm_flow_set_open(pid_t pid)
@@ -262,20 +268,20 @@ void shm_flow_set_zero(struct shm_flow_set * set,
 
 int shm_flow_set_add(struct shm_flow_set * set,
                      size_t                idx,
-                     int                   port_id)
+                     int                   flow_id)
 {
         assert(set);
-        assert(!(port_id < 0) && port_id < SYS_MAX_FLOWS);
+        assert(!(flow_id < 0) && flow_id < SYS_MAX_FLOWS);
         assert(idx < PROG_MAX_FQUEUES);
 
         pthread_mutex_lock(set->lock);
 
-        if (set->mtable[port_id] != -1) {
+        if (set->mtable[flow_id] != -1) {
                 pthread_mutex_unlock(set->lock);
                 return -EPERM;
         }
 
-        set->mtable[port_id] = idx;
+        set->mtable[flow_id] = idx;
 
         pthread_mutex_unlock(set->lock);
 
@@ -284,33 +290,33 @@ int shm_flow_set_add(struct shm_flow_set * set,
 
 void shm_flow_set_del(struct shm_flow_set * set,
                       size_t                idx,
-                      int                   port_id)
+                      int                   flow_id)
 {
         assert(set);
-        assert(!(port_id < 0) && port_id < SYS_MAX_FLOWS);
+        assert(!(flow_id < 0) && flow_id < SYS_MAX_FLOWS);
         assert(idx < PROG_MAX_FQUEUES);
 
         pthread_mutex_lock(set->lock);
 
-        if (set->mtable[port_id] == (ssize_t) idx)
-                set->mtable[port_id] = -1;
+        if (set->mtable[flow_id] == (ssize_t) idx)
+                set->mtable[flow_id] = -1;
 
         pthread_mutex_unlock(set->lock);
 }
 
 int shm_flow_set_has(struct shm_flow_set * set,
                      size_t                idx,
-                     int                   port_id)
+                     int                   flow_id)
 {
         int ret = 0;
 
         assert(set);
-        assert(!(port_id < 0) && port_id < SYS_MAX_FLOWS);
+        assert(!(flow_id < 0) && flow_id < SYS_MAX_FLOWS);
         assert(idx < PROG_MAX_FQUEUES);
 
         pthread_mutex_lock(set->lock);
 
-        if (set->mtable[port_id] == (ssize_t) idx)
+        if (set->mtable[flow_id] == (ssize_t) idx)
                 ret = 1;
 
         pthread_mutex_unlock(set->lock);
@@ -319,25 +325,25 @@ int shm_flow_set_has(struct shm_flow_set * set,
 }
 
 void shm_flow_set_notify(struct shm_flow_set * set,
-                         int                   port_id,
+                         int                   flow_id,
                          int                   event)
 {
         assert(set);
-        assert(!(port_id < 0) && port_id < SYS_MAX_FLOWS);
+        assert(!(flow_id < 0) && flow_id < SYS_MAX_FLOWS);
 
         pthread_mutex_lock(set->lock);
 
-        if (set->mtable[port_id] == -1) {
+        if (set->mtable[flow_id] == -1) {
                 pthread_mutex_unlock(set->lock);
                 return;
         }
 
-        (fqueue_ptr(set, set->mtable[port_id]) +
-         (set->heads[set->mtable[port_id]]))->port_id = port_id;
-        (fqueue_ptr(set, set->mtable[port_id]) +
-         (set->heads[set->mtable[port_id]])++)->event = event;
+        (fqueue_ptr(set, set->mtable[flow_id]) +
+         (set->heads[set->mtable[flow_id]]))->flow_id = flow_id;
+        (fqueue_ptr(set, set->mtable[flow_id]) +
+         (set->heads[set->mtable[flow_id]])++)->event = event;
 
-        pthread_cond_signal(&set->conds[set->mtable[port_id]]);
+        pthread_cond_signal(&set->conds[set->mtable[flow_id]]);
 
         pthread_mutex_unlock(set->lock);
 }
diff --git a/src/lib/shm_rbuff.c b/src/lib/shm_rbuff.c
index 453f5183..a6eab699 100644
--- a/src/lib/shm_rbuff.c
+++ b/src/lib/shm_rbuff.c
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2018
  *
- * Ring buffer implementations for incoming SDUs
+ * Ring buffer implementations for incoming packets
  *
  *    Dimitri Staessens <[email protected]>
  *    Sander Vrijders   <[email protected]>
@@ -63,10 +63,10 @@ struct shm_rbuff {
         size_t *          tail;     /* start of ringbuffer tail      */
         size_t *          acl;      /* access control                */
         pthread_mutex_t * lock;     /* lock all free space in shm    */
-        pthread_cond_t *  add;      /* SDU arrived                   */
-        pthread_cond_t *  del;      /* SDU removed                   */
+        pthread_cond_t *  add;      /* packet arrived                */
+        pthread_cond_t *  del;      /* packet removed                */
         pid_t             pid;      /* pid of the owner              */
-        int               port_id;  /* port_id of the flow           */
+        int               flow_id;  /* flow_id of the flow           */
 };
 
 void shm_rbuff_close(struct shm_rbuff * rb)
@@ -81,7 +81,7 @@ void shm_rbuff_close(struct shm_rbuff * rb)
 #define MM_FLAGS (PROT_READ | PROT_WRITE)
 
 struct shm_rbuff * rbuff_create(pid_t pid,
-                                int   port_id,
+                                int   flow_id,
                                 int   flags)
 {
         struct shm_rbuff * rb;
@@ -89,7 +89,7 @@ struct shm_rbuff * rbuff_create(pid_t pid,
         ssize_t *          shm_base;
         char               fn[FN_MAX_CHARS];
 
-        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", pid, port_id);
+        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", pid, flow_id);
 
         rb = malloc(sizeof(*rb));
         if (rb == NULL)
@@ -116,7 +116,7 @@ struct shm_rbuff * rbuff_create(pid_t pid,
         rb->add      = (pthread_cond_t *) (rb->lock + 1);
         rb->del      = rb->add + 1;
         rb->pid      = pid;
-        rb->port_id  = port_id;
+        rb->flow_id  = flow_id;
 
         return rb;
 
@@ -131,7 +131,7 @@ struct shm_rbuff * rbuff_create(pid_t pid,
 }
 
 struct shm_rbuff * shm_rbuff_create(pid_t pid,
-                                    int   port_id)
+                                    int   flow_id)
 {
         struct shm_rbuff *  rb;
         pthread_mutexattr_t mattr;
@@ -140,7 +140,7 @@ struct shm_rbuff * shm_rbuff_create(pid_t pid,
 
         mask = umask(0);
 
-        rb = rbuff_create(pid, port_id, O_CREAT | O_EXCL | O_RDWR);
+        rb = rbuff_create(pid, flow_id, O_CREAT | O_EXCL | O_RDWR);
 
         umask(mask);
 
@@ -175,7 +175,7 @@ struct shm_rbuff * shm_rbuff_create(pid_t pid,
         *rb->tail = 0;
 
         rb->pid = pid;
-        rb->port_id = port_id;
+        rb->flow_id = flow_id;
 
         pthread_mutexattr_destroy(&mattr);
         pthread_condattr_destroy(&cattr);
@@ -197,9 +197,9 @@ struct shm_rbuff * shm_rbuff_create(pid_t pid,
 }
 
 struct shm_rbuff * shm_rbuff_open(pid_t pid,
-                                  int   port_id)
+                                  int   flow_id)
 {
-        return rbuff_create(pid, port_id, O_RDWR);
+        return rbuff_create(pid, flow_id, O_RDWR);
 }
 
 #if (defined(SHM_RBUFF_LOCKLESS) &&                            \
diff --git a/src/lib/shm_rbuff_ll.c b/src/lib/shm_rbuff_ll.c
index c488f274..0fc9ae7b 100644
--- a/src/lib/shm_rbuff_ll.c
+++ b/src/lib/shm_rbuff_ll.c
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2018
  *
- * Lockless ring buffer for incoming SDUs
+ * Lockless ring buffer for incoming packets
  *
  *    Dimitri Staessens <[email protected]>
  *    Sander Vrijders   <[email protected]>
@@ -29,7 +29,7 @@ void shm_rbuff_destroy(struct shm_rbuff * rb)
 
         assert(rb);
 
-        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", rb->pid, rb->port_id);
+        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", rb->pid, rb->flow_id);
 
         shm_rbuff_close(rb);
 
diff --git a/src/lib/shm_rbuff_pthr.c b/src/lib/shm_rbuff_pthr.c
index 3b7ea2d4..51d801f6 100644
--- a/src/lib/shm_rbuff_pthr.c
+++ b/src/lib/shm_rbuff_pthr.c
@@ -1,7 +1,7 @@
 /*
  * Ouroboros - Copyright (C) 2016 - 2018
  *
- * Ring buffer for incoming SDUs
+ * Ring buffer for incoming packets
  *
  *    Dimitri Staessens <[email protected]>
  *    Sander Vrijders   <[email protected]>
@@ -33,7 +33,7 @@ void shm_rbuff_destroy(struct shm_rbuff * rb)
 
         pthread_mutex_unlock(rb->lock);
 #endif
-        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", rb->pid, rb->port_id);
+        sprintf(fn, SHM_RBUFF_PREFIX "%d.%d", rb->pid, rb->flow_id);
 
         shm_rbuff_close(rb);
 
diff --git a/src/lib/shm_rdrbuff.c b/src/lib/shm_rdrbuff.c
index 182ad084..31d9f2b6 100644
--- a/src/lib/shm_rdrbuff.c
+++ b/src/lib/shm_rdrbuff.c
@@ -82,7 +82,7 @@ struct shm_rdrbuff {
         size_t *          tail;     /* start of ringbuffer tail */
         pthread_mutex_t * lock;     /* lock all free space in shm */
         pthread_cond_t *  full;     /* flag when full */
-        pthread_cond_t *  healthy;  /* flag when SDU is read */
+        pthread_cond_t *  healthy;  /* flag when packet is read */
         pid_t *           pid;      /* pid of the irmd owner */
 };
 
diff --git a/src/lib/sockets.c b/src/lib/sockets.c
index b148b7ca..85726783 100644
--- a/src/lib/sockets.c
+++ b/src/lib/sockets.c
@@ -165,3 +165,38 @@ char * ipcp_sock_path(pid_t pid)
 
         return full_name;
 }
+
+qosspec_msg_t spec_to_msg(qosspec_t * qs)
+{
+        qosspec_t     spec;
+        qosspec_msg_t msg = QOSSPEC_MSG__INIT;
+
+        spec = (qs == NULL ? qos_raw : *qs);
+
+        msg.delay        = spec.delay;
+        msg.bandwidth    = spec.bandwidth;
+        msg.availability = spec.availability;
+        msg.loss         = spec.loss;
+        msg.ber          = spec.ber;
+        msg.in_order     = spec.in_order;
+        msg.max_gap      = spec.max_gap;
+
+        return msg;
+}
+
+qosspec_t msg_to_spec(qosspec_msg_t * msg)
+{
+        qosspec_t     spec;
+
+        assert(msg);
+
+        spec.delay        = msg->delay;
+        spec.bandwidth    = msg->bandwidth;
+        spec.availability = msg->availability;
+        spec.loss         = msg->loss;
+        spec.ber          = msg->ber;
+        spec.in_order     = msg->in_order;
+        spec.max_gap      = msg->max_gap;
+
+        return spec;
+}
diff --git a/src/tools/irm/irm_ipcp_bootstrap.c b/src/tools/irm/irm_ipcp_bootstrap.c
index e1f75956..3d9386ad 100644
--- a/src/tools/irm/irm_ipcp_bootstrap.c
+++ b/src/tools/irm/irm_ipcp_bootstrap.c
@@ -287,10 +287,15 @@ int do_bootstrap_ipcp(int     argc,
 
                         if (autobind && conf.type != IPCP_NORMAL) {
                                 printf("Can only bind normal IPCPs, "
-                                       "autobind disabled.\n");
+                                       "autobind disabled.\n\n");
                                 autobind = false;
                         }
 
+                        if (strlen(layer) > LAYER_NAME_SIZE) {
+                                printf("Layer name too big.\n\n");
+                                goto fail_usage;
+                        }
+
                         strcpy(conf.layer_info.layer_name, layer);
                         if (conf.type != IPCP_UDP)
                                 conf.layer_info.dir_hash_algo = hash_algo;
diff --git a/src/tools/irm/irm_ipcp_destroy.c b/src/tools/irm/irm_ipcp_destroy.c
index cb86b167..2d5ed983 100644
--- a/src/tools/irm/irm_ipcp_destroy.c
+++ b/src/tools/irm/irm_ipcp_destroy.c
@@ -89,6 +89,7 @@ int do_destroy_ipcp(int     argc,
                         break;
                 }
 
+        free(ipcps);
 
         return 0;
  fail_destroy:
diff --git a/src/tools/irm/irm_unregister.c b/src/tools/irm/irm_unregister.c
index 52491b42..137bc7e9 100644
--- a/src/tools/irm/irm_unregister.c
+++ b/src/tools/irm/irm_unregister.c
@@ -69,7 +69,7 @@ int do_unregister(int argc, char ** argv)
         char *             ipcp[MAX_IPCPS];
         size_t             ipcp_len   = 0;
         struct ipcp_info * ipcps;
-        size_t             len;
+        ssize_t            len;
         size_t             i;
 
         while (argc > 0) {
@@ -103,7 +103,10 @@ int do_unregister(int argc, char ** argv)
         }
 
         len = irm_list_ipcps(&ipcps);
-        for (i = 0; i < len; ++i) {
+        if (len < 0)
+                return -1;
+
+        for (i = 0; i < (size_t) len; ++i) {
                 size_t j;
                 for (j = 0; j < layers_len; j++) {
                         if (wildcard_match(ipcps[i].layer, layers[j]) == 0) {
diff --git a/src/tools/ocbr/ocbr.c b/src/tools/ocbr/ocbr.c
index e2bd84af..12983da3 100644
--- a/src/tools/ocbr/ocbr.c
+++ b/src/tools/ocbr/ocbr.c
@@ -60,7 +60,7 @@ struct s {
 static void usage(void)
 {
         printf("Usage: cbr [OPTION]...\n"
-               "Sends SDUs from client to server at a constant bit rate.\n\n"
+               "Sends packets from client to server at a constant bit rate.\n\n"
                "  -l, --listen              Run in server mode\n"
                "\n"
                "Server options:\n"
@@ -70,10 +70,10 @@ static void usage(void)
                "Client options:\n"
                "  -n, --server_apn          Specify the name of the server.\n"
                "  -d, --duration            Duration for sending (s)\n"
-               "  -f, --flood               Send SDUs as fast as possible\n"
-               "  -s, --size                SDU size (B, max %ld B)\n"
+               "  -f, --flood               Send packets as fast as possible\n"
+               "  -s, --size                packet size (B, max %ld B)\n"
                "  -r, --rate                Rate (b/s)\n"
-               "      --sleep               Sleep in between sending SDUs\n"
+               "      --sleep               Sleep in between sending packets\n"
                "\n\n"
                "      --help                Display this help text and exit\n",
                BUF_SIZE);
@@ -82,7 +82,7 @@ static void usage(void)
 int main(int argc, char ** argv)
 {
         int    duration = 60;  /* One minute test */
-        int    size = 1000;    /* 1000 byte SDUs */
+        int    size = 1000;    /* 1000 byte packets */
         long   rate = 1000000; /* 1 Mb/s */
         bool   flood = false;
         bool   sleep = false;
diff --git a/src/tools/ocbr/ocbr_client.c b/src/tools/ocbr/ocbr_client.c
index 026ab001..63b43721 100644
--- a/src/tools/ocbr/ocbr_client.c
+++ b/src/tools/ocbr/ocbr_client.c
@@ -155,7 +155,7 @@ int client_main(char * server,
         ms = ts_diff_ms(&start, &end);
 
         printf("sent statistics: "
-               "%9ld SDUs, %12ld bytes in %9d ms, %4.4f Mb/s\n",
+               "%9ld packets, %12ld bytes in %9d ms, %4.4f Mb/s\n",
                seqnr, seqnr * size, ms, (seqnr / (ms * 1000.0)) * size * 8.0);
 
         flow_dealloc(fd);
diff --git a/src/tools/ocbr/ocbr_server.c b/src/tools/ocbr/ocbr_server.c
index 4f080eff..75983201 100644
--- a/src/tools/ocbr/ocbr_server.c
+++ b/src/tools/ocbr/ocbr_server.c
@@ -90,8 +90,8 @@ static void handle_flow(int fd)
 
         bool stop = false;
 
-        long sdus            = 0;
-        long sdus_intv       = 0;
+        long packets         = 0;
+        long packets_intv    = 0;
         long bytes_read      = 0;
         long bytes_read_intv = 0;
 
@@ -109,7 +109,7 @@ static void handle_flow(int fd)
 
                 if (count > 0) {
                         clock_gettime(CLOCK_REALTIME, &alive);
-                        sdus++;
+                        packets++;
                         bytes_read += count;
                 }
 
@@ -121,17 +121,18 @@ static void handle_flow(int fd)
 
                 if (stop || ts_diff_ms(&now, &iv_end) < 0) {
                         long us = ts_diff_us(&iv_start, &now);
-                        printf("Flow %4d: %9ld SDUs (%12ld bytes) in %9ld ms"
-                               " => %9.4f p/s, %9.4f Mb/s\n",
+                        printf("Flow %4d: %9ld packets (%12ld bytes) in %9ld ms"
+                               " => %9.4f pps, %9.4f Mbps\n",
                                fd,
-                               sdus - sdus_intv,
+                               packets - packets_intv,
                                bytes_read - bytes_read_intv,
                                us / 1000,
-                               ((sdus - sdus_intv) / (double) us) * MILLION,
+                               ((packets - packets_intv) / (double) us)
+                               * MILLION,
                                8 * ((bytes_read - bytes_read_intv)
                                     / (double)(us)));
                         iv_start = iv_end;
-                        sdus_intv = sdus;
+                        packets_intv = packets;
                         bytes_read_intv = bytes_read;
                         ts_add(&iv_start, &intv, &iv_end);
                 }
diff --git a/src/tools/oecho/oecho.c b/src/tools/oecho/oecho.c
index cc173988..b6a74aa5 100644
--- a/src/tools/oecho/oecho.c
+++ b/src/tools/oecho/oecho.c
@@ -72,7 +72,7 @@ static int server_main(void)
 
                 count = flow_read(fd, &buf, BUF_SIZE);
                 if (count < 0) {
-                        printf("Failed to read SDU.\n");
+                        printf("Failed to read packet.\n");
                         flow_dealloc(fd);
                         continue;
                 }
@@ -80,7 +80,7 @@ static int server_main(void)
                 printf("Message from client is %.*s.\n", (int) count, buf);
 
                 if (flow_write(fd, buf, count) == -1) {
-                        printf("Failed to write SDU.\n");
+                        printf("Failed to write packet.\n");
                         flow_dealloc(fd);
                         continue;
                 }
@@ -105,14 +105,14 @@ static int client_main(void)
         }
 
         if (flow_write(fd, message, strlen(message) + 1) < 0) {
-                printf("Failed to write SDU.\n");
+                printf("Failed to write packet.\n");
                 flow_dealloc(fd);
                 return -1;
         }
 
         count = flow_read(fd, buf, BUF_SIZE);
         if (count < 0) {
-                printf("Failed to read SDU.\n");
+                printf("Failed to read packet.\n");
                 flow_dealloc(fd);
                 return -1;
         }
diff --git a/src/tools/operf/operf.c b/src/tools/operf/operf.c
index 137e8647..92555c23 100644
--- a/src/tools/operf/operf.c
+++ b/src/tools/operf/operf.c
@@ -119,8 +119,8 @@ static void usage(void)
                "  -d, --duration            Test duration (default 60s)\n"
                "  -r, --rate                Rate (b/s)\n"
                "  -s, --size                Payload size (B, default 1500)\n"
-               "  -f, --flood               Send SDUs as fast as possible\n"
-               "      --sleep               Sleep in between sending SDUs\n"
+               "  -f, --flood               Send packets as fast as possible\n"
+               "      --sleep               Sleep in between sending packets\n"
                "\n"
                "      --help                Display this help text and exit\n");
 }
diff --git a/src/tools/operf/operf_client.c b/src/tools/operf/operf_client.c
index c8873c54..6862944e 100644
--- a/src/tools/operf/operf_client.c
+++ b/src/tools/operf/operf_client.c
@@ -120,11 +120,12 @@ void * writer(void * o)
         msg = (struct msg *) buf;
 
         if (client.flood)
-                printf("Flooding %s with %d byte SDUs for %d seconds.\n\n",
+                printf("Flooding %s with %d byte packets for %d seconds.\n\n",
                        client.server_name, client.size,
                        client.duration / 1000);
         else
-                printf("Sending %d byte SDUs for %d s to %s at %.3lf Mb/s.\n\n",
+                printf("Sending %d byte packets for %d s to %s "
+                       "at %.3lf Mb/s.\n\n",
                        client.size, client.duration / 1000,
                        client.server_name,
                        client.rate / (double) MILLION);
@@ -141,7 +142,7 @@ void * writer(void * o)
                 msg->id = client.sent;
 
                 if (flow_write(*fdp, buf, client.size) == -1) {
-                        printf("Failed to send SDU.\n");
+                        printf("Failed to send packet.\n");
                         flow_dealloc(*fdp);
                         free(buf);
                         return (void *) -1;
@@ -225,7 +226,7 @@ int client_main(void)
 
                 printf("\n");
                 printf("--- %s perf statistics ---\n", client.server_name);
-                printf("%ld SDUs transmitted, ", client.sent);
+                printf("%ld packets transmitted, ", client.sent);
                 printf("%ld received, ", client.rcvd);
                 printf("%ld%% packet loss, ", client.sent == 0 ? 0 :
                        100 - ((100 * client.rcvd) / client.sent));
diff --git a/src/tools/oping/oping_client.c b/src/tools/oping/oping_client.c
index 0f7695b5..a978e659 100644
--- a/src/tools/oping/oping_client.c
+++ b/src/tools/oping/oping_client.c
@@ -176,7 +176,7 @@ void * writer(void * o)
                 msg->tv_nsec = now.tv_nsec;
 
                 if (flow_write(*fdp, buf, client.size) == -1) {
-                        printf("Failed to send SDU.\n");
+                        printf("Failed to send packet.\n");
                         flow_dealloc(*fdp);
                         free(buf);
                         return (void *) -1;
@@ -253,7 +253,7 @@ static int client_main(void)
 
         printf("\n");
         printf("--- %s ping statistics ---\n", client.s_apn);
-        printf("%d SDUs transmitted, ", client.sent);
+        printf("%d packets transmitted, ", client.sent);
         printf("%d received, ", client.rcvd);
         printf("%zd out-of-order, ", client.ooo);
         printf("%.0lf%% packet loss, ", client.sent == 0 ? 0 :