Merged in sandervrijders/ouroboros/be (pull request #54)

Dif config now correctly passed to the IPCP

16 files changed, 292 insertions, 71 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index 0b52a2bc..fb4884b7 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -8,6 +8,7 @@ set(HEADER_FILES
         common.h
         da.h
         dev.h
+        dif_config.h
         du_buff.h
         flow.h
         instance_name.h
diff --git a/include/ouroboros/common.h b/include/ouroboros/common.h
index 658c3618..971a382a 100644
--- a/include/ouroboros/common.h
+++ b/include/ouroboros/common.h
@@ -42,28 +42,4 @@ struct qos_spec {
         uint32_t jitter;
 };
 
-/* FIXME: What should be configurable in the DIF? */
-struct dif_config {
-        /* general data */
-        char * dif_name;
-
-        /* TODO: efficient policies */
-
-        /* dt field sizes in octets */
-        uint8_t addr_size;
-        uint8_t cep_id_size;
-        uint8_t pdu_length_size;
-        uint8_t qos_id_size;
-        uint8_t seqno_size;
-
-        /* constants for dup */
-        uint8_t ttl_size;
-        uint8_t chk_size;
-
-        /* values, octets */
-        uint32_t min_pdu_size;
-        uint32_t max_pdu_size;
-
-};
-
 #endif /* OUROBOROS_COMMON_H */
diff --git a/include/ouroboros/dif_config.h b/include/ouroboros/dif_config.h
new file mode 100644
index 00000000..91b44cb1
--- /dev/null
+++ b/include/ouroboros/dif_config.h
@@ -0,0 +1,61 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * DIF configurations for each IPCP type
+ *
+ *    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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/utils.h>
+
+#ifndef OUROBOROS_DIF_CONFIG_H
+#define OUROBOROS_DIF_CONFIG_H
+
+enum ipcp_type {
+        IPCP_NORMAL = 1,
+        IPCP_SHIM_UDP
+};
+
+struct dif_config {
+        char * dif_name;
+        enum ipcp_type type;
+
+        union {
+                /* Normal DIF */
+                struct {
+                        uint8_t addr_size;
+                        uint8_t cep_id_size;
+                        uint8_t pdu_length_size;
+                        uint8_t qos_id_size;
+                        uint8_t seqno_size;
+
+                        /* DUP constants */
+                        uint8_t ttl_size;
+                        uint8_t chk_size;
+
+                        uint32_t min_pdu_size;
+                        uint32_t max_pdu_size;
+                };
+                /* Shim UDP */
+                struct {
+                        uint32_t ip_addr;
+                };
+        };
+};
+
+
+#endif /* OUROBOROS_DIF_CONFIG_H */
diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index fdaf5c4a..3198a882 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -24,7 +24,9 @@
 #define OUROBOROS_IPCP_H
 
 #include <ouroboros/common.h>
+#include <ouroboros/dif_config.h>
 #include <ouroboros/instance_name.h>
+#include <ouroboros/sockets.h>
 
 #include <sys/types.h>
 
@@ -32,7 +34,8 @@ struct ipcp;
 
 /* Returns the process id */
 pid_t ipcp_create(instance_name_t * api,
-                  char *            ipcp_type);
+                  enum ipcp_type    ipcp_type);
+
 int   ipcp_destroy(pid_t pid);
 
 int   ipcp_reg(pid_t   pid,
@@ -42,12 +45,13 @@ int   ipcp_unreg(pid_t   pid,
                  char ** difs,
                  size_t  difs_size);
 
-int   ipcp_bootstrap(pid_t               pid,
-                     struct dif_config * conf);
 int   ipcp_enroll(pid_t  pid,
                   char * member_name,
                   char * n_1_dif);
 
+int   ipcp_bootstrap(pid_t pid,
+                     dif_config_msg_t * conf);
+
 /* Flow related ops, these go from IRMd to IPCP */
 
 int   ipcp_ap_reg(pid_t    pid,
diff --git a/include/ouroboros/irm.h b/include/ouroboros/irm.h
index 780bf77b..24bb2c42 100644
--- a/include/ouroboros/irm.h
+++ b/include/ouroboros/irm.h
@@ -23,18 +23,20 @@
 #ifndef OUROBOROS_IRM_H
 #define OUROBOROS_IRM_H
 
-#include "common.h"
-#include "instance_name.h"
+#include <ouroboros/instance_name.h>
+#include <ouroboros/dif_config.h>
 
 int irm_create_ipcp(instance_name_t * api,
-                    char *            ipcp_type);
+                    enum ipcp_type    ipcp_type);
+
 int irm_destroy_ipcp(instance_name_t * api);
 
-int irm_bootstrap_ipcp(instance_name_t *   api,
-                       struct dif_config * conf);
 int irm_enroll_ipcp(instance_name_t * api,
                     char *            dif_name);
 
+int irm_bootstrap_ipcp(instance_name_t *   api,
+                       struct dif_config * conf);
+
 int irm_reg_ipcp(instance_name_t * api,
                  char **           difs,
                  size_t            difs_size);
diff --git a/include/ouroboros/sockets.h b/include/ouroboros/sockets.h
index 0c517bd4..be5ae651 100644
--- a/include/ouroboros/sockets.h
+++ b/include/ouroboros/sockets.h
@@ -27,6 +27,9 @@
 
 #include <sys/types.h>
 
+#include "dif_config.pb-c.h"
+typedef DifConfigMsg dif_config_msg_t;
+
 #include "irmd_messages.pb-c.h"
 typedef IrmMsg irm_msg_t;
 
diff --git a/include/ouroboros/utils.h b/include/ouroboros/utils.h
index 2eaccae9..2e5a4944 100644
--- a/include/ouroboros/utils.h
+++ b/include/ouroboros/utils.h
@@ -20,6 +20,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#define MAX(a,b) (a > b ? a : b)
+
 /*
  * Returns the number of characters a uint would
  * need when represented as a string
diff --git a/src/irmd/main.c b/src/irmd/main.c
index a900b0ed..1f1c4839 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -31,6 +31,7 @@
 #include <ouroboros/list.h>
 #include <ouroboros/instance_name.h>
 #include <ouroboros/utils.h>
+#include <ouroboros/dif_config.h>
 
 #include <sys/socket.h>
 #include <sys/un.h>
@@ -84,7 +85,7 @@ static struct ipcp_entry * find_ipcp_by_name(instance_name_t * api)
 }
 
 static int create_ipcp(instance_name_t * api,
-                       char *            ipcp_type)
+                       enum ipcp_type    ipcp_type)
 {
         pid_t pid;
         struct ipcp_entry * tmp = NULL;
@@ -144,8 +145,8 @@ static int destroy_ipcp(instance_name_t * api)
         return 0;
 }
 
-static int bootstrap_ipcp(instance_name_t *   api,
-                          struct dif_config * conf)
+static int bootstrap_ipcp(instance_name_t *  api,
+                          dif_config_msg_t * conf)
 {
         struct ipcp_entry * entry = NULL;
 
@@ -155,7 +156,7 @@ static int bootstrap_ipcp(instance_name_t *   api,
                 return -1;
         }
 
-        entry->dif_name = strdup( conf->dif_name);
+        entry->dif_name = strdup(conf->dif_name);
         if (entry->dif_name == NULL) {
                 LOG_ERR("Failed to strdup");
                 return -1;
@@ -389,7 +390,7 @@ int main()
                         break;
                 case IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP:
                         ret_msg.has_result = true;
-                        ret_msg.result = bootstrap_ipcp(&api, NULL);
+                        ret_msg.result = bootstrap_ipcp(&api, msg->conf);
                         break;
                 case IRM_MSG_CODE__IRM_ENROLL_IPCP:
                         ret_msg.has_result = true;
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 1f7b0f55..c2d1bcc7 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -8,6 +8,8 @@ find_package(ProtobufC REQUIRED)
 include_directories(${PROTOBUF_INCLUDE_DIRS})
 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(DIF_CONFIG_PROTO_SRCS DIF_CONFIG_PROTO_HDRS
+                                          dif_config.proto)
 
 find_library(LIBRT_LIBRARIES rt)
 if(NOT LIBRT_LIBRARIES)
@@ -36,11 +38,11 @@ set(SOURCE_FILES
   utils.c
   )
 
-install(FILES ${IRM_PROTO_HDRS} ${IPCP_PROTO_HDRS}
+install(FILES ${IRM_PROTO_HDRS} ${IPCP_PROTO_HDRS} ${DIF_CONFIG_PROTO_HDRS}
   DESTINATION include/ouroboros)
 
 add_library(ouroboros SHARED ${SOURCE_FILES}
-  ${IRM_PROTO_SRCS} ${IPCP_PROTO_SRCS})
+  ${IRM_PROTO_SRCS} ${IPCP_PROTO_SRCS} ${DIF_CONFIG_PROTO_SRCS})
 
 target_link_libraries(ouroboros ${LIBRT_LIBRARIES}
   ${LIBPTHREAD_LIBRARIES} ${PROTOBUF_C_LIBRARY})
diff --git a/src/lib/dif_config.proto b/src/lib/dif_config.proto
new file mode 100644
index 00000000..87cb222f
--- /dev/null
+++ b/src/lib/dif_config.proto
@@ -0,0 +1,16 @@
+message dif_config_msg {
+        required string dif_name = 1;
+        required int32 ipcp_type = 2;
+        // Config for normal IPCP
+        optional uint32 addr_size = 3;
+        optional uint32 cep_id_size = 4;
+        optional uint32 pdu_length_size = 5;
+        optional uint32 qos_id_size = 6;
+        optional uint32 seqno_size = 7;
+        optional uint32 ttl_size = 8;
+        optional uint32 chk_size = 9;
+        optional uint32 min_pdu_size = 10;
+        optional uint32 max_pdu_size = 11;
+        // Config for shim UDP
+        optional uint32 ip_addr = 12;
+}
\ No newline at end of file
diff --git a/src/lib/ipcp.c b/src/lib/ipcp.c
index d61fcb50..a0febe4e 100644
--- a/src/lib/ipcp.c
+++ b/src/lib/ipcp.c
@@ -100,7 +100,7 @@ static ipcp_msg_t * send_recv_ipcp_msg(pid_t pid,
 }
 
 pid_t ipcp_create(instance_name_t * api,
-                  char *            ipcp_type)
+                  enum ipcp_type    ipcp_type)
 {
         pid_t pid = 0;
         char * api_id = NULL;
@@ -108,11 +108,6 @@ pid_t ipcp_create(instance_name_t * api,
         char * ipcp_dir = "bin/ipcpd";
         char * full_name = NULL;
 
-        if (ipcp_type == NULL)
-                return -1;
-
-        LOG_DBG("%lu", _POSIX_C_SOURCE);
-
         pid = fork();
         if (pid == -1) {
                 LOG_ERR("Failed to fork");
@@ -146,7 +141,7 @@ pid_t ipcp_create(instance_name_t * api,
 
         char * argv[] = {full_name,
                          api->name, api_id,
-                         ipcp_type, 0};
+                         0};
 
         char * envp[] = {0};
 
@@ -241,14 +236,19 @@ int ipcp_unreg(pid_t pid,
         return ret;
 }
 
+
 int ipcp_bootstrap(pid_t pid,
-                   struct dif_config * conf)
+                   dif_config_msg_t * conf)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
+        if (conf == NULL)
+                return -EINVAL;
+
         msg.code = IPCP_MSG_CODE__IPCP_BOOTSTRAP;
+        msg.conf = conf;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
diff --git a/src/lib/ipcpd_messages.proto b/src/lib/ipcpd_messages.proto
index bcdd54ae..b83c34c7 100644
--- a/src/lib/ipcpd_messages.proto
+++ b/src/lib/ipcpd_messages.proto
@@ -1,3 +1,5 @@
+import "dif_config.proto";
+
 enum ipcp_msg_code {
         IPCP_BOOTSTRAP = 1;
         IPCP_ENROLL = 2;
@@ -14,7 +16,7 @@ enum ipcp_msg_code {
 message ipcp_msg {
         required ipcp_msg_code code = 1;
         optional string ap_name = 2;
-        // Missing dif_config field here
+        optional dif_config_msg conf = 3;
         repeated string dif_name = 4;
         optional int32 result = 5;
         optional uint32 port_id = 6;
diff --git a/src/lib/irm.c b/src/lib/irm.c
index 7c187be1..70b7b3a5 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -31,13 +31,13 @@
 #include <stdlib.h>
 
 int irm_create_ipcp(instance_name_t * api,
-                    char *            ipcp_type)
+                    enum ipcp_type    ipcp_type)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (api == NULL || ipcp_type == NULL || api->name == NULL)
+        if (api == NULL || api->name == NULL)
                 return -EINVAL;
 
         msg.code = IRM_MSG_CODE__IRM_CREATE_IPCP;
@@ -94,6 +94,7 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
                        struct dif_config * conf)
 {
         irm_msg_t msg = IRM_MSG__INIT;
+        dif_config_msg_t config = DIF_CONFIG_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
@@ -105,9 +106,45 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
         msg.has_api_id = true;
         msg.api_id = api->id;
 
+        msg.conf = &config;
+        config.dif_name = conf->dif_name;
+        config.ipcp_type = conf->type;
+
+        switch (conf->type) {
+        case IPCP_NORMAL:
+                config.has_addr_size = true;
+                config.has_cep_id_size = true;
+                config.has_pdu_length_size = true;
+                config.has_qos_id_size = true;
+                config.has_seqno_size = true;
+                config.has_ttl_size = true;
+                config.has_chk_size = true;
+                config.has_min_pdu_size = true;
+                config.has_max_pdu_size = true;
+
+                config.addr_size = conf->addr_size;
+                config.cep_id_size = conf->cep_id_size;
+                config.pdu_length_size = conf->pdu_length_size;
+                config.qos_id_size = conf->qos_id_size;
+                config.seqno_size = conf->seqno_size;
+                config.ttl_size = conf->ttl_size;
+                config.chk_size = conf->chk_size;
+                config.min_pdu_size = conf->min_pdu_size;
+                config.max_pdu_size = conf->max_pdu_size;
+                break;
+        case IPCP_SHIM_UDP:
+                config.has_ip_addr = true;
+
+                config.ip_addr = conf->ip_addr;
+                break;
+        default:
+                return -1;
+        }
+
         recv_msg = send_recv_irm_msg(&msg);
-        if (recv_msg == NULL)
+        if (recv_msg == NULL) {
                 return -1;
+        }
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
diff --git a/src/lib/irmd_messages.proto b/src/lib/irmd_messages.proto
index 44070755..3a2432f3 100644
--- a/src/lib/irmd_messages.proto
+++ b/src/lib/irmd_messages.proto
@@ -1,3 +1,5 @@
+import "dif_config.proto";
+
 enum irm_msg_code {
         IRM_CREATE_IPCP = 1;
         IRM_DESTROY_IPCP = 2;
@@ -26,14 +28,13 @@ message irm_msg {
         optional string ap_name = 2;
         optional uint32 api_id = 3;
         optional string ae_name = 4;
-        optional string ipcp_type = 5;
-        // Missing dif_config field here
-        repeated string dif_name = 7;
-        optional int32 fd = 8;
-        optional int32 result = 9;
-        // Missing qos_spec here
-        optional int32 oflags = 10;
-        optional string dst_ap_name = 11;
-        optional uint32 port_id = 12;
-        optional int32 pid = 13;
+        optional uint32 ipcp_type = 5;
+        repeated string dif_name = 6;
+        optional int32 fd = 7;
+        optional int32 result = 8;
+        optional int32 oflags = 9;
+        optional string dst_ap_name = 10;
+        optional uint32 port_id = 11;
+        optional int32 pid = 12;
+        optional dif_config_msg conf = 13;
 };
diff --git a/src/tools/irm/irm_bootstrap_ipcp.c b/src/tools/irm/irm_bootstrap_ipcp.c
index 03a913fb..78a09362 100644
--- a/src/tools/irm/irm_bootstrap_ipcp.c
+++ b/src/tools/irm/irm_bootstrap_ipcp.c
@@ -22,43 +22,141 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
 #include <ouroboros/irm.h>
-#include <ouroboros/common.h>
+#include <ouroboros/dif_config.h>
 
 #include "irm_ops.h"
 #include "irm_utils.h"
 
+#define NORMAL "normal"
+#define SHIM_UDP "shim-udp"
+
+#define DEFAULT_ADDR_SIZE 4
+#define DEFAULT_CEP_ID_SIZE 2
+#define DEFAULT_PDU_LEN_SIZE 2
+#define DEFAULT_QOS_ID_SIZE 1
+#define DEFAULT_SEQ_NO_SIZE 4
+#define DEFAULT_TTL_SIZE 1
+#define DEFAULT_CHK_SIZE 2
+#define DEFAULT_MIN_PDU_SIZE 0
+#define DEFAULT_MAX_PDU_SIZE 9000
+
 static void usage()
 {
         /* FIXME: Add dif_config stuff */
         printf("Usage: irm bootstrap_ipcp\n"
                "           ap <application process name>\n"
-               "           [api <application process instance>]\n");
+               "           [api <application process instance>]\n"
+               "           dif <DIF name>\n"
+               "           type [TYPE]\n\n"
+               "where TYPE = {" NORMAL " " SHIM_UDP "}\n\n"
+               "if TYPE == " NORMAL "\n"
+               "           [addr <address size> (default: %d)]\n"
+               "           [cep_id <CEP-id size> (default: %d)]\n"
+               "           [pdu_len <PDU length size> (default: %d)]\n"
+               "           [qos_id <QoS-id size> (default: %d)]\n"
+               "           [seqno <sequence number size> (default: %d)]\n"
+               "           [ttl <time to live size>  (default: %d)]\n"
+               "           [chk <checksum size>  (default: %d)]\n"
+               "           [min_pdu <minimum PDU size> (default: %d)]\n"
+               "           [max_pdu <maximum PDU size> (default: %d)]\n"
+               "if TYPE == " SHIM_UDP "\n"
+               "           ip <IP address in dotted notation>\n",
+               DEFAULT_ADDR_SIZE, DEFAULT_CEP_ID_SIZE,
+               DEFAULT_PDU_LEN_SIZE, DEFAULT_QOS_ID_SIZE,
+               DEFAULT_SEQ_NO_SIZE, DEFAULT_TTL_SIZE,
+               DEFAULT_CHK_SIZE, DEFAULT_MIN_PDU_SIZE,
+               DEFAULT_MAX_PDU_SIZE);
 }
 
-
 int do_bootstrap_ipcp(int argc, char ** argv)
 {
-        instance_name_t api = {NULL, 0};
+        instance_name_t   api = {NULL, 0};
         struct dif_config conf;
+        uint8_t addr_size = DEFAULT_ADDR_SIZE;
+        uint8_t cep_id_size = DEFAULT_CEP_ID_SIZE;
+        uint8_t pdu_length_size = DEFAULT_PDU_LEN_SIZE;
+        uint8_t qos_id_size = DEFAULT_QOS_ID_SIZE;
+        uint8_t seqno_size = DEFAULT_SEQ_NO_SIZE;
+        uint8_t ttl_size = DEFAULT_TTL_SIZE;
+        uint8_t chk_size = DEFAULT_CHK_SIZE;
+        uint32_t min_pdu_size = DEFAULT_MIN_PDU_SIZE;
+        uint32_t max_pdu_size = DEFAULT_MAX_PDU_SIZE;
+        uint32_t ip_addr = 0;
+        char * ipcp_type = NULL;
+        char * dif_name = NULL;
 
         while (argc > 0) {
-                if (matches(*argv, "ap") == 0) {
+                if (matches(*argv, "type") == 0) {
+                        ipcp_type = *(argv + 1);
+                } else if (matches(*argv, "dif") == 0) {
+                        dif_name = *(argv + 1);
+                } else if (matches(*argv, "ap") == 0) {
                         api.name = *(argv + 1);
                 } else if (matches(*argv, "api") == 0) {
                         api.id = atoi(*(argv + 1));
+                } else if (matches(*argv, "ip") == 0) {
+                        if (inet_pton (AF_INET, *(argv + 1), &ip_addr) != 1) {
+                                usage();
+                                return -1;
+                        }
+                } else if (matches(*argv, "addr") == 0) {
+                        addr_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "cep_id") == 0) {
+                        cep_id_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "pdu_len") == 0) {
+                        pdu_length_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "qos_id") == 0) {
+                        qos_id_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "seqno") == 0) {
+                        seqno_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "ttl") == 0) {
+                        ttl_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "chk") == 0) {
+                        chk_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "min_pdu") == 0) {
+                        min_pdu_size = atoi(*(argv + 1));
+                } else if (matches(*argv, "max_pdu") == 0) {
+                        max_pdu_size = atoi(*(argv + 1));
                 } else {
                         printf("\"%s\" is unknown, try \"irm "
                                "destroy_ipcp\".\n", *argv);
                         return -1;
                 }
 
-
                 argc -= 2;
                 argv += 2;
         }
 
-        if (api.name == NULL) {
+        if (api.name == NULL || dif_name == NULL || ipcp_type == NULL) {
+                usage();
+                return -1;
+        }
+
+        conf.dif_name = dif_name;
+
+        if (strcmp(ipcp_type, NORMAL) == 0) {
+                conf.type = IPCP_NORMAL;
+                conf.addr_size = addr_size;
+                conf.cep_id_size = cep_id_size;
+                conf.pdu_length_size = pdu_length_size;
+                conf.qos_id_size = qos_id_size;
+                conf.seqno_size = seqno_size;
+                conf.ttl_size = ttl_size;
+                conf.chk_size = chk_size;
+                conf.min_pdu_size = min_pdu_size;
+                conf.max_pdu_size = max_pdu_size;
+        } else if (strcmp(ipcp_type, SHIM_UDP) == 0) {
+                conf.type = IPCP_SHIM_UDP;
+                if (ip_addr == 0) {
+                        usage();
+                        return -1;
+                }
+                conf.ip_addr = ip_addr;
+        } else {
                 usage();
                 return -1;
         }
diff --git a/src/tools/irm/irm_create_ipcp.c b/src/tools/irm/irm_create_ipcp.c
index 73d20dce..08b55259 100644
--- a/src/tools/irm/irm_create_ipcp.c
+++ b/src/tools/irm/irm_create_ipcp.c
@@ -20,10 +20,11 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <stdio.h>
 #include <ouroboros/irm.h>
 #include <ouroboros/common.h>
 #include <ouroboros/instance_name.h>
+
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -31,18 +32,23 @@
 #include "irm_ops.h"
 #include "irm_utils.h"
 
+#define NORMAL "normal"
+#define SHIM_UDP "shim-udp"
+
 static void usage()
 {
         printf("Usage: irm create_ipcp\n"
                "           ap <application process name>\n"
                "           [api <application process instance>]\n"
-               "           type <ipc process type>\n");
+               "           type [TYPE]\n\n"
+               "where TYPE = {" NORMAL " " SHIM_UDP "}\n");
 }
 
 int do_create_ipcp(int argc, char ** argv)
 {
         char * ipcp_type = NULL;
         instance_name_t api = {NULL, 0};
+        enum ipcp_type type = 0;
 
         while (argc > 0) {
                 if (matches(*argv, "type") == 0) {
@@ -66,5 +72,14 @@ int do_create_ipcp(int argc, char ** argv)
                 return -1;
         }
 
-        return irm_create_ipcp(&api, ipcp_type);
+        if (strcmp(ipcp_type, NORMAL) == 0)
+                type = IPCP_NORMAL;
+        else if (strcmp(ipcp_type, SHIM_UDP) == 0)
+                type = IPCP_SHIM_UDP;
+        else {
+                usage();
+                return -1;
+        }
+
+        return irm_create_ipcp(&api, type);
 }