lib: Provide first implementation of revised CDAP

This commit introduces a first version of the revised CDAP
specification. CACEP (for authentication purposes) has been separated
from CDAP. Application developers may use CDAP if they find it
useful. Within Ouroboros CDAP will be used to perform operations on
the RIB of an IPCP.

6 files changed, 107 insertions, 153 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index 68c88a18..ee339294 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -3,14 +3,14 @@ configure_file(
   "${CMAKE_CURRENT_BINARY_DIR}/config.h")
 
 set(HEADER_FILES
-        cdap.h
-        dev.h
-        errno.h
-        flow.h
-        irm.h
-        irm_config.h
-        nsm.h
-        qos.h
-)
+  cdap.h
+  common.h
+  dev.h
+  errno.h
+  flow.h
+  irm.h
+  irm_config.h
+  nsm.h
+  qos.h)
 
 install(FILES ${HEADER_FILES} DESTINATION usr/include/ouroboros)
diff --git a/include/ouroboros/cdap.h b/include/ouroboros/cdap.h
index 72788ad6..da669feb 100644
--- a/include/ouroboros/cdap.h
+++ b/include/ouroboros/cdap.h
@@ -4,6 +4,7 @@
  * The Common Distributed Application Protocol
  *
  *    Sander Vrijders <[email protected]>
+ *    Dimitri Staessens <[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
@@ -23,148 +24,75 @@
 #ifndef OUROBOROS_CDAP_H
 #define OUROBOROS_CDAP_H
 
+#include <ouroboros/common.h>
+
 #include <stdbool.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#define F_SYNC 0x0001
 
 struct cdap;
 
+/* Callback functions that work on the application's RIB */
 struct cdap_ops {
-        /* Sender related callbacks */
-        int (* handle_connect_r)(int fd,
-                                 int invoke_id,
-                                 int result);
-        int (* handle_release_r)(int fd,
-                                 int invoke_id,
-                                 int result);
-        int (* handle_read_r)(int fd,
-                              int invoke_id,
-                              int result,
-                              char * reason,
-                              char * obj_val,
-                              bool complete);
-        int (* handle_cancelread_r)(int fd,
-                                    int invoke_id,
-                                    int result);
-        int (* handle_write_r)(int fd,
-                               int invoke_id,
-                               int result,
-                               char * reason,
-                               char * obj_val);
-        int (* handle_create_r)(int fd,
-                                int invoke_id,
-                                int result);
-        int (* handle_delete_r)(int fd,
-                                int invoke_id,
-                                int result);
-        int (* handle_start_r)(int fd,
-                               int invoke_id,
-                               int result);
-        int (* handle_stop_r)(int fd,
-                              int invoke_id,
-                              int result);
+        int (* cdap_reply)(struct cdap * instance,
+                           int           invoke_id,
+                           int           result,
+                           buffer_t *    val,
+                           size_t        len);
+
+        int (* cdap_read)(struct cdap * instance,
+                          char *        name);
+        int (* cdap_write)(struct cdap * instance,
+                           char *        name,
+                           buffer_t *    val,
+                           size_t        len,
+                           uint32_t      flags);
 
-        /* Receiver related callbacks */
-        int (* handle_connect)(int fd,
-                               int invoke_id,
-                               rina_name_t src,
-                               rina_name_t dst,
-                               char * auth_mech,
-                               char * auth_val);
-        int (* handle_release)(int fd,
-                               int invoke_id);
-        int (* handle_cancelread)(int fd,
-                                  int invoke_id);
-        int (* handle_write)(int fd,
-                             int invoke_id,
-                             char * obj_name,
-                             char * obj_val);
-        int (* handle_create)(int fd,
-                              int invoke_id,
-                              char * obj_class,
-                              char * obj_name,
-                              char * obj_val);
-        int (* handle_delete)(int fd,
-                              int invoke_id,
-                              char * obj_name);
-        int (* handle_start)(int fd,
-                             int invoke_id,
-                             char * obj_name,
-                             char * obj_val);
-        int (* handle_stop)(int fd,
-                            int invoke_id,
-                            char * obj_name,
-                            char * obj_val);
+        int (* cdap_create)(struct cdap * instance,
+                            char *        name,
+                            buffer_t      val);
+        int (* cdap_delete)(struct cdap * instance,
+                            char *        name,
+                            buffer_t      val);
+
+        int (* cdap_start)(struct cdap * instance,
+                           char *        name);
+        int (* cdap_stop)(struct cdap * instance,
+                          char *        name);
 };
 
-struct cdap * cdap_create(struct cdap_ops ops,
-                          int fd);
+/* Assumes flow is blocking */
+struct cdap * cdap_create(struct cdap_ops * ops,
+                          int               fd);
 int           cdap_destroy(struct cdap * instance);
 
-/* Sender related functions */
-int           cdap_send_connect(struct cdap * instance,
-                                int invoke_id,
-                                rina_name_t src,
-                                rina_name_t dst,
-                                char * auth_mech,
-                                char * auth_val);
-int           cdap_send_release(struct cdap * instance,
-                                int invoke_id);
+/* Returns a positive invoke-id on success to be used in the callback */
 int           cdap_send_read(struct cdap * instance,
-                             int invoke_id,
-                             char * obj_name);
-int           cdap_send_cancelread(struct cdap * instance,
-                                   int invoke_id,
-                                   char * obj_name);
+                             char *        name);
 int           cdap_send_write(struct cdap * instance,
-                              int invoke_id,
-                              char * obj_name,
-                              char * obj_val);
+                              char *        name,
+                              buffer_t *    val,
+                              size_t        len,
+                              uint32_t      flags);
+
 int           cdap_send_create(struct cdap * instance,
-                               int invoke_id,
-                               char * obj_name,
-                               char * obj_val);
+                               char *        name,
+                               buffer_t      val);
 int           cdap_send_delete(struct cdap * instance,
-                               int invoke_id,
-                               char * obj_name);
+                               char *        name,
+                               buffer_t      val);
+
 int           cdap_send_start(struct cdap * instance,
-                              int invoke_id,
-                              char * obj_name,
-                              char * obj_val);
+                              char *        name);
 int           cdap_send_stop(struct cdap * instance,
-                             int invoke_id,
-                             char * obj_name,
-                             char * obj_val);
+                             char *        name);
 
-/* Receiver related functions */
-int           cdap_send_connect_r(struct cdap * instance,
-                                  int invoke_id,
-                                  int result);
-int           cdap_send_release_r(struct cdap * instance,
-                                  int invoke_id,
-                                  int result);
-int           cdap_send_read_r(struct cdap * instance,
-                               int invoke_id,
-                               int result,
-                               char * reason,
-                               char * obj_val,
-                               bool complete);
-int           cdap_send_cancelread_r(struct cdap * instance,
-                                     int invoke_id,
-                                     int result);
-int           cdap_send_write_r(struct cdap * instance,
-                                int invoke_id,
-                                int result,
-                                char * obj_name,
-                                char * obj_val);
-int           cdap_send_create_r(struct cdap * instance,
-                                 int invoke_id,
-                                 int result);
-int           cdap_send_delete_r(struct cdap * instance,
-                                 int invoke_id,
-                                 int result);
-int           cdap_send_start_r(struct cdap * instance,
-                                int invoke_id,
-                                int result);
-int           cdap_send_stop_r(struct cdap * instance,
-                               int invoke_id,
-                               int result);
+/* Can only be called following a callback function */
+int           cdap_send_reply(struct cdap * instance,
+                              int           invoke_id,
+                              int           result,
+                              buffer_t *    val,
+                              size_t        len);
 #endif
diff --git a/include/ouroboros/common.h b/include/ouroboros/common.h
index 039e1a83..dbd050f1 100644
--- a/include/ouroboros/common.h
+++ b/include/ouroboros/common.h
@@ -25,24 +25,10 @@
 
 #include <stdint.h>
 #include <unistd.h>
-#include <stdbool.h>
-#include <errno.h>
 
 typedef struct {
         uint8_t * data;
-        size_t    size;
+        size_t    len;
 } buffer_t;
 
-/* FIXME: To be decided which QoS cubes we support */
-enum qos_cube {
-        QOS_CUBE_BE = 0,
-        QOS_CUBE_VIDEO
-};
-
-enum flow_state {
-        FLOW_NULL = 0,
-        FLOW_PENDING,
-        FLOW_ALLOCATED
-};
-
 #endif /* OUROBOROS_COMMON_H */
diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index f5657b64..c1aa452b 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -22,7 +22,7 @@
 
 #include <ouroboros/irm_config.h>
 #include <ouroboros/sockets.h>
-#include <ouroboros/common.h>
+#include <ouroboros/shared.h>
 
 #include <sys/types.h>
 
diff --git a/include/ouroboros/shared.h b/include/ouroboros/shared.h
new file mode 100644
index 00000000..f5e34dc8
--- /dev/null
+++ b/include/ouroboros/shared.h
@@ -0,0 +1,38 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Shared definitions between IRMd and IPCPs
+ *
+ *    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.
+ */
+
+#ifndef OUROBOROS_SHARED_H
+#define OUROBOROS_SHARED_H
+
+/* FIXME: To be decided which QoS cubes we support */
+enum qos_cube {
+        QOS_CUBE_BE = 0,
+        QOS_CUBE_VIDEO
+};
+
+enum flow_state {
+        FLOW_NULL = 0,
+        FLOW_PENDING,
+        FLOW_ALLOCATED
+};
+
+#endif /* OUROBOROS_SHARED_H */
diff --git a/include/ouroboros/shm_du_map.h b/include/ouroboros/shm_du_map.h
index e8934bae..9d6d7aaf 100644
--- a/include/ouroboros/shm_du_map.h
+++ b/include/ouroboros/shm_du_map.h
@@ -24,7 +24,9 @@
 #ifndef OUROBOROS_SHM_DU_MAP_H
 #define OUROBOROS_SHM_DU_MAP_H
 
-#include "common.h"
+#include <errno.h>
+#include <unistd.h>
+#include <stdint.h>
 #include <sys/types.h>
 #include <pthread.h>