Merged in dstaesse/ouroboros/ipcpd-udp (pull request #57)

ipcpd: initial IPC processes

27 files changed, 1633 insertions, 136 deletions

diff --git a/src/ipcpd/CMakeLists.txt b/src/ipcpd/CMakeLists.txt
index bcb5b986..6311e3dc 100644
--- a/src/ipcpd/CMakeLists.txt
+++ b/src/ipcpd/CMakeLists.txt
@@ -1,26 +1,8 @@
-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
-include_directories(${CMAKE_SOURCE_DIR}/include)
-include_directories(${CMAKE_BINARY_DIR}/include)
-
-set(SOURCE_FILES
+set(IPCP_SOURCES
         # Add source files here
-        main.c
-        pci.c
-        shm_pci.c
+        ${CMAKE_CURRENT_SOURCE_DIR}/ipcp.c
+        ${CMAKE_CURRENT_SOURCE_DIR}/ipcp-data.c
 )
 
-add_executable (ipcpd ${SOURCE_FILES})
-
-target_link_libraries (ipcpd LINK_PUBLIC ouroboros)
-
-include(MacroAddCompileFlags)
-if (CMAKE_BUILD_TYPE MATCHES Debug)
-   MACRO_ADD_COMPILE_FLAGS(ipcpd -DCONFIG_OUROBOROS_DEBUG)
-endif (CMAKE_BUILD_TYPE MATCHES Debug)
-
-install(TARGETS ipcpd RUNTIME DESTINATION bin)
-
-# Enable once ipcpd has tests
-# add_subdirectory(tests)
+add_subdirectory(normal)
+add_subdirectory(shim-udp)
diff --git a/src/ipcpd/ipcp-data.c b/src/ipcpd/ipcp-data.c
new file mode 100644
index 00000000..17649b42
--- /dev/null
+++ b/src/ipcpd/ipcp-data.c
@@ -0,0 +1,477 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * IPC process utilities
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * 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 "ipcp-data.h"
+#include <ouroboros/flow.h>
+#include <ouroboros/shm_du_map.h>
+#include <ouroboros/list.h>
+#include <ouroboros/utils.h>
+
+#define OUROBOROS_PREFIX "ipcp-utils"
+
+#include <ouroboros/logs.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+struct reg_entry {
+        struct list_head list;
+        char *           ap_name;
+        uint32_t         reg_ap_id;
+};
+
+struct dir_entry {
+        struct list_head list;
+        char *     ap_name;
+        uint64_t   addr;
+};
+
+static struct reg_entry * reg_entry_create(const char * ap_name,
+                                           uint32_t     reg_ap_id)
+{
+        struct reg_entry * entry = malloc(sizeof *entry);
+        if (entry == NULL)
+                return NULL;
+
+        entry->reg_ap_id = reg_ap_id;
+        entry->ap_name = strdup(ap_name);
+        if (entry->ap_name == NULL)
+                return NULL;
+
+        return entry;
+}
+
+static void reg_entry_destroy(struct reg_entry * entry)
+{
+        if (entry == NULL)
+                return;
+
+        free(entry->ap_name);
+        free(entry);
+}
+
+static struct dir_entry * dir_entry_create(const char * ap_name,
+                                           uint64_t     addr)
+{
+        struct dir_entry * entry = malloc(sizeof *entry);
+        if (entry == NULL)
+                return NULL;
+
+        entry->addr    = addr;
+        entry->ap_name = strdup(ap_name);
+        if (entry->ap_name == NULL)
+                return NULL;
+
+        return entry;
+}
+
+static void dir_entry_destroy(struct dir_entry * entry)
+{
+        if (entry == NULL)
+                return;
+
+        free(entry->ap_name);
+        free(entry);
+}
+
+struct ipcp_data * ipcp_data_create()
+{
+        struct ipcp_data * data = malloc(sizeof *data);
+        if (data == NULL)
+                return NULL;
+
+        data->iname = NULL;
+        data->type  = 0;
+        data->dum   = NULL;
+
+        return data;
+}
+
+struct ipcp_data * ipcp_data_init(struct ipcp_data * dst,
+                                  instance_name_t * iname,
+                                  enum ipcp_type    ipcp_type)
+{
+        if (dst == NULL)
+                return NULL;
+
+        dst->iname = instance_name_dup(iname);
+        dst->type  = ipcp_type;
+
+        dst->dum = shm_du_map_open();
+        if (dst->dum == NULL)
+                return NULL;
+
+        /* init the lists */
+        INIT_LIST_HEAD(&dst->registry);
+        INIT_LIST_HEAD(&dst->flows);
+        INIT_LIST_HEAD(&dst->directory);
+
+        /* init the mutexes */
+        pthread_mutex_init(&dst->reg_lock, NULL);
+        pthread_mutex_init(&dst->dir_lock, NULL);
+        pthread_mutex_init(&dst->flow_lock, NULL);
+
+        return dst;
+}
+
+static void clear_registry(struct ipcp_data * data)
+{
+        struct list_head * h;
+        struct list_head * t;
+        list_for_each_safe(h, t, &data->registry)
+                reg_entry_destroy(list_entry(h, struct reg_entry, list));
+}
+
+static void clear_directory(struct ipcp_data * data)
+{
+        struct list_head * h;
+        struct list_head * t;
+        list_for_each_safe(h, t, &data->directory)
+                dir_entry_destroy(list_entry(h, struct dir_entry, list));
+}
+
+static void clear_flows(struct ipcp_data * data)
+{
+        struct list_head * h;
+        struct list_head * t;
+        list_for_each_safe(h, t, &data->flows)
+                flow_destroy(list_entry(h, flow_t, list));
+
+}
+
+void ipcp_data_destroy(struct ipcp_data * data)
+{
+        if (data == NULL)
+                return;
+
+        /* FIXME: finish all pending operations here */
+
+        if (data->iname != NULL)
+                instance_name_destroy(data->iname);
+        data->iname = NULL;
+
+        if (data->dum != NULL)
+                shm_du_map_close(data->dum);
+        data->dum = NULL;
+
+        pthread_mutex_lock(&data->reg_lock);
+        pthread_mutex_lock(&data->dir_lock);
+        pthread_mutex_lock(&data->flow_lock);
+
+        /* clear the lists */
+        clear_registry(data);
+        clear_directory(data);
+        clear_flows(data);
+
+        /* no need to unlock, just free the entire thing
+        pthread_mutex_unlock(&data->flow_lock);
+        pthread_mutex_unlock(&data->dir_lock);
+        pthread_mutex_unlock(&data->reg_lock);
+        */
+
+        free(data);
+}
+
+
+
+static struct reg_entry * find_reg_entry_by_name(struct ipcp_data * data,
+                                                 const char *       ap_name)
+{
+        struct list_head * h;
+        list_for_each(h, &data->registry) {
+                struct reg_entry * e = list_entry(h, struct reg_entry, list);
+                if (!strcmp(e->ap_name, ap_name))
+                        return e;
+        }
+
+        return NULL;
+}
+
+static struct reg_entry * find_reg_entry_by_id(struct ipcp_data * data,
+                                               uint32_t           reg_ap_id)
+{
+        struct list_head * h;
+        list_for_each(h, &data->registry) {
+                struct reg_entry * e = list_entry(h, struct reg_entry, list);
+                if (e->reg_ap_id == reg_ap_id)
+                        return e;
+        }
+
+        return NULL;
+}
+
+static struct dir_entry * find_dir_entry(struct ipcp_data * data,
+                                         const char *       ap_name,
+                                         uint64_t           addr)
+{
+        struct list_head * h;
+        list_for_each(h, &data->directory) {
+                struct dir_entry * e = list_entry(h, struct dir_entry, list);
+                if (e->addr == addr && !strcmp(e->ap_name, ap_name))
+                        return e;
+        }
+
+        return NULL;
+}
+
+static struct dir_entry * find_dir_entry_any(struct ipcp_data * data,
+                                             const char *       ap_name)
+{
+        struct list_head * h;
+        list_for_each(h, &data->directory) {
+                struct dir_entry * e = list_entry(h, struct dir_entry, list);
+                if (!strcmp(e->ap_name, ap_name))
+                        return e;
+        }
+
+        return NULL;
+}
+
+bool ipcp_data_is_in_directory(struct ipcp_data * data,
+                               const char *       ap_name)
+{
+        return find_dir_entry_any(data, ap_name) != NULL;
+}
+
+int ipcp_data_del_reg_entry(struct ipcp_data * data,
+                            uint32_t           reg_ap_id)
+{
+        struct reg_entry * e;
+        if (data == NULL)
+                return -1;
+
+        pthread_mutex_lock(&data->reg_lock);
+
+        e = find_reg_entry_by_id(data, reg_ap_id);
+        if (e == NULL) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return 0; /* nothing to do */
+        }
+
+        list_del(&e->list);
+
+        reg_entry_destroy(e);
+
+        pthread_mutex_unlock(&data->reg_lock);
+
+        return 0;
+}
+
+int ipcp_data_del_dir_entry(struct ipcp_data * data,
+                            const char *       ap_name,
+                            uint64_t           addr)
+{
+        struct dir_entry * e;
+        if (data == NULL)
+                return -1;
+
+        pthread_mutex_lock(&data->dir_lock);
+
+        e = find_dir_entry(data, ap_name, addr);
+        if (e == NULL) {
+                pthread_mutex_unlock(&data->dir_lock);
+                return 0; /* nothing to do */
+        }
+
+        list_del(&e->list);
+
+        dir_entry_destroy(e);
+
+        pthread_mutex_unlock(&data->dir_lock);
+
+        return 0;
+}
+
+int ipcp_data_add_reg_entry(struct ipcp_data * data,
+                            char *             ap_name,
+                            uint32_t           reg_ap_id)
+{
+        struct reg_entry * entry;
+
+        if (data == NULL || ap_name == NULL)
+                return -1;
+
+        pthread_mutex_lock(&data->reg_lock);
+
+        if (find_reg_entry_by_name(data, ap_name) ||
+            find_reg_entry_by_id(data, reg_ap_id)) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return -2;
+        }
+
+        entry = reg_entry_create(ap_name, reg_ap_id);
+        if (entry == NULL) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return -1;
+        }
+
+        list_add(&entry->list,&data->registry);
+
+        pthread_mutex_unlock(&data->reg_lock);
+
+        return 0;
+}
+
+int ipcp_data_add_dir_entry(struct ipcp_data * data,
+                            char *             ap_name,
+                            uint64_t           addr)
+{
+        struct dir_entry * entry;
+
+        if (data == NULL || ap_name == NULL)
+                return -1;
+
+        pthread_mutex_lock(&data->dir_lock);
+
+        if (find_dir_entry(data, ap_name, addr) != NULL) {
+                pthread_mutex_unlock(&data->dir_lock);
+                return -2;
+        }
+
+        entry = dir_entry_create(ap_name, addr);
+        if (entry == NULL) {
+                pthread_mutex_unlock(&data->dir_lock);
+                return -1;
+        }
+
+        list_add(&entry->list,&data->directory);
+
+        pthread_mutex_unlock(&data->dir_lock);
+
+        return 0;
+}
+
+bool ipcp_data_is_in_registry(struct ipcp_data * data,
+                              const char *       ap_name)
+{
+        return find_reg_entry_by_name(data, ap_name) != NULL;
+}
+
+uint32_t ipcp_data_get_reg_ap_id(struct ipcp_data * data,
+                                 const char *       ap_name)
+{
+        struct reg_entry * entry;
+        uint32_t id;
+
+        pthread_mutex_lock(&data->reg_lock);
+
+        entry = find_reg_entry_by_name(data, ap_name);
+
+        if (entry == NULL) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return 0; /* undefined behaviour */
+        }
+
+        id = entry->reg_ap_id;
+
+        pthread_mutex_unlock(&data->reg_lock);
+
+        return id;
+}
+
+const char * ipcp_data_get_reg_ap_name(struct ipcp_data * data,
+                                   uint32_t           reg_ap_id)
+{
+        struct reg_entry * entry;
+        char * name;
+
+        pthread_mutex_lock(&data->reg_lock);
+
+        entry = find_reg_entry_by_id(data, reg_ap_id);
+
+        if (entry == NULL) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return NULL;
+        }
+
+        name = strdup(entry->ap_name);
+        if (name == NULL) {
+                pthread_mutex_unlock(&data->reg_lock);
+                return NULL;
+        }
+
+        pthread_mutex_unlock(&data->reg_lock);
+
+        return name;
+}
+
+uint64_t ipcp_data_get_addr(struct ipcp_data * data,
+                            const char *       ap_name)
+{
+        struct dir_entry * entry;
+        uint64_t           addr;
+
+        pthread_mutex_lock(&data->dir_lock);
+
+        entry = find_dir_entry_any(data, ap_name);
+
+        if (entry == NULL) {
+                pthread_mutex_unlock(&data->dir_lock);
+                return 0; /* undefined behaviour, 0 may be a valid address */
+        }
+
+        addr = entry->addr;
+
+        pthread_mutex_unlock(&data->dir_lock);
+
+        return addr;
+}
+
+static flow_t * find_flow(struct ipcp_data * data,
+                          uint32_t           port_id)
+{
+        struct list_head * h;
+        list_for_each(h, &data->flows) {
+                flow_t * f = list_entry(h, flow_t, list);
+                if (f->port_id == port_id)
+                        return f;
+        }
+
+        return NULL;
+}
+
+bool ipcp_data_has_flow(struct ipcp_data * data,
+                        uint32_t           port_id)
+{
+        return find_flow(data, port_id) != NULL;
+}
+
+int ipcp_data_add_flow(struct ipcp_data * data,
+                       flow_t *           flow)
+{
+        if (data == NULL || flow == NULL)
+                return -1;
+
+        pthread_mutex_lock(&data->flow_lock);
+
+        if (ipcp_data_has_flow(data, flow->port_id)) {
+                pthread_mutex_unlock(&data->flow_lock);
+                return -2;
+        }
+
+        list_add(&flow->list,&data->flows);
+
+        pthread_mutex_unlock(&data->flow_lock);
+
+        return 0;
+}
diff --git a/src/ipcpd/ipcp-data.h b/src/ipcpd/ipcp-data.h
new file mode 100644
index 00000000..d51f3730
--- /dev/null
+++ b/src/ipcpd/ipcp-data.h
@@ -0,0 +1,91 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Utitilies for building IPC processes
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * 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 IPCPD_IPCP_DATA_H
+#define IPCPD_IPCP_DATA_H
+
+#include <ouroboros/common.h>
+#include <ouroboros/instance_name.h>
+#include <ouroboros/list.h>
+#include <ouroboros/flow.h>
+#include <sys/types.h>
+#include <pthread.h>
+
+#include "ipcp-ops.h"
+
+struct ipcp_data {
+        instance_name_t   * iname;
+        enum ipcp_type      type;
+
+        struct shm_du_map * dum;
+
+        struct list_head    registry;
+        pthread_mutex_t     reg_lock;
+
+        struct list_head    flows;
+        pthread_mutex_t     flow_lock;
+
+        struct list_head    directory;
+        pthread_mutex_t     dir_lock;
+
+        pthread_mutex_t     lock;
+};
+
+struct ipcp_data * ipcp_data_create();
+struct ipcp_data * ipcp_data_init(struct ipcp_data * dst,
+                                  instance_name_t *  iname,
+                                  enum ipcp_type     ipcp_type);
+void               ipcp_data_destroy(struct ipcp_data * data);
+
+int          ipcp_data_add_reg_entry(struct ipcp_data * data,
+                                     char *             ap_name,
+                                     uint32_t           reg_ap_id);
+int          ipcp_data_del_reg_entry(struct ipcp_data * data,
+                                     uint32_t           reg_ap_id);
+int          ipcp_data_add_dir_entry(struct ipcp_data * data,
+                                     char *             ap_name,
+                                     uint64_t           addr);
+int          ipcp_data_del_dir_entry(struct ipcp_data * data,
+                                     const char *       ap_name,
+                                     uint64_t           addr);
+bool         ipcp_data_is_in_registry(struct ipcp_data * data,
+                                      const char *       ap_name);
+uint32_t     ipcp_data_get_reg_ap_id(struct ipcp_data * data,
+                                     const char *       ap_name);
+const char * ipcp_data_get_reg_ap_name(struct ipcp_data * data,
+                                       uint32_t           reg_ap_id);
+bool         ipcp_data_is_in_directory(struct ipcp_data * data,
+                                       const char *       ap_name);
+uint64_t     ipcp_data_get_addr(struct ipcp_data * data,
+                                const char *       ap_name);
+bool         ipcp_data_has_flow(struct ipcp_data * data,
+                                uint32_t           port_id);
+bool         ipcp_data_has_flow_s(struct ipcp_data * data,
+                                  uint32_t           port_id,
+                                  enum flow_state    state);
+int          ipcp_data_add_flow(struct ipcp_data * data,
+                                flow_t *           flow);
+int          ipcp_data_remove_flow(struct ipcp_data * data,
+                                   uint32_t           port_id);
+
+#endif /* IPCPD_IPCP_DATA_H */
diff --git a/src/ipcpd/ipcp-ops.h b/src/ipcpd/ipcp-ops.h
new file mode 100644
index 00000000..5c917229
--- /dev/null
+++ b/src/ipcpd/ipcp-ops.h
@@ -0,0 +1,59 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * IPC process ops
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *    Sander Vrijders   <sander.vrijders@intec.ugent.be>
+ *
+ * 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 IPCPD_IPCP_OPS_H
+#define IPCPD_IPCP_OPS_H
+
+#include <ouroboros/common.h>
+#include <ouroboros/dif_config.h>
+#include <sys/types.h>
+
+struct ipcp_ops {
+        int   (* ipcp_bootstrap)(struct dif_config * conf);
+        int   (* ipcp_enroll)(char * member_name,
+                              char * n_1_dif);
+        int   (* ipcp_reg)(char ** dif_names,
+                           size_t len);
+        int   (* ipcp_unreg)(char ** dif_names,
+                             size_t len);
+        int   (* ipcp_ap_reg)(char *   ap_name,
+                              uint32_t reg_ap_id);
+        int   (* ipcp_ap_unreg)(uint32_t reg_ap_id);
+        int   (* ipcp_flow_alloc)(uint32_t port_id,
+                                  char *   dst_ap_name,
+                                  char *   src_ap_name,
+                                  char *   src_ae_name,
+                                  struct qos_spec * qos);
+        int   (* ipcp_flow_alloc_resp)(uint32_t port_id,
+                                       int      response);
+        int   (* ipcp_flow_dealloc)(uint32_t port_id);
+
+        /* FIXME: let's see how this will work with the shm_du_map */
+        int   (* ipcp_du_write)(uint32_t port_id,
+                                size_t map_index);
+
+        int   (* ipcp_du_read)(uint32_t port_id,
+                               size_t map_index);
+};
+
+#endif /* IPCPD_IPCP_OPS_H */
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
new file mode 100644
index 00000000..0b652ff6
--- /dev/null
+++ b/src/ipcpd/ipcp.c
@@ -0,0 +1,236 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * IPC process main loop
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * 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/config.h>
+#include <ouroboros/ipcp.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include "ipcp.h"
+
+#define OUROBOROS_PREFIX "ipcpd/ipcp"
+#include <ouroboros/logs.h>
+
+int ipcp_arg_check(int argc, char * argv[])
+{
+        if (argc != 4)
+                return -1;
+
+        /* argument 1: pid of irmd */
+        if (atoi(argv[1]) == 0)
+                return -1;
+
+        /* name conformity responsibility of NMS */
+
+        /* argument 2: ap name */
+        /* argument 3: instance id */
+
+        return 0;
+}
+
+int ipcp_main_loop(struct ipcp * _ipcp)
+{
+        int     lsockfd;
+        int     sockfd;
+        uint8_t buf[IPCP_MSG_BUF_SIZE];
+
+        ipcp_msg_t *    msg;
+        ssize_t         count;
+        buffer_t        buffer;
+        ipcp_msg_t      ret_msg = IPCP_MSG__INIT;
+
+        dif_config_msg_t * conf_msg;
+        struct dif_config  conf;
+
+        if (_ipcp == NULL) {
+                LOG_ERR("Invalid ipcp struct.");
+                return 1;
+        }
+
+        sockfd = server_socket_open(ipcp_sock_path(getpid()));
+        if (sockfd < 0) {
+                LOG_ERR("Could not open server socket.");
+                return 1;
+        }
+
+        while (true) {
+                ret_msg.code = IPCP_MSG_CODE__IPCP_REPLY;
+
+                lsockfd = accept(sockfd, 0, 0);
+                if (lsockfd < 0) {
+                        LOG_ERR("Cannot accept new connection");
+                        break;
+                }
+
+                count = read(lsockfd, buf, IPCP_MSG_BUF_SIZE);
+                if (count <= 0) {
+                        LOG_ERR("Failed to read from socket");
+                        close(lsockfd);
+                        continue;
+                }
+
+                msg = ipcp_msg__unpack(NULL, count, buf);
+                if (msg == NULL) {
+                        close(lsockfd);
+                        continue;
+                }
+
+                switch (msg->code) {
+                case IPCP_MSG_CODE__IPCP_BOOTSTRAP:
+                        if (_ipcp->ops->ipcp_bootstrap == NULL) {
+                                LOG_ERR("Bootstrap unsupported.");
+                                break;
+                        }
+                        conf_msg = msg->conf;
+                        conf.type = conf_msg->ipcp_type;
+                        if (conf_msg->ipcp_type == IPCP_NORMAL) {
+                                conf.addr_size = conf_msg->addr_size;
+                                conf.cep_id_size = conf_msg->cep_id_size;
+                                conf.pdu_length_size
+                                        = conf_msg->pdu_length_size;
+                                conf.qos_id_size     = conf_msg->qos_id_size;
+                                conf.seqno_size      = conf_msg->seqno_size;
+                                conf.ttl_size        = conf_msg->seqno_size;
+                                conf.chk_size        = conf_msg->chk_size;
+                                conf.min_pdu_size    = conf_msg->min_pdu_size;
+                                conf.max_pdu_size    = conf_msg->max_pdu_size;
+                        }
+                        if (conf_msg->ipcp_type == IPCP_SHIM_UDP) {
+                                conf.ip_addr = conf_msg->ip_addr;
+                                conf.dns_addr = conf_msg->dns_addr;
+                        }
+
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_bootstrap(&conf);
+                        break;
+                case IPCP_MSG_CODE__IPCP_ENROLL:
+                        if (_ipcp->ops->ipcp_enroll == NULL) {
+                                LOG_ERR("Enroll unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_enroll(
+                                msg->member_name, msg->n_1_dif);
+
+                        break;
+
+                case IPCP_MSG_CODE__IPCP_REG:
+                        if (_ipcp->ops->ipcp_reg == NULL) {
+                                LOG_ERR("Reg unsupported.");
+                                break;
+
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_reg(
+                                msg->dif_names, msg->len);
+                        break;
+                case IPCP_MSG_CODE__IPCP_UNREG:
+                        if (_ipcp->ops->ipcp_unreg == NULL) {
+                                LOG_ERR("Unreg unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_unreg(
+                                msg->dif_names, msg->len);
+                        break;
+                case IPCP_MSG_CODE__IPCP_AP_REG:
+                        if (_ipcp->ops->ipcp_ap_reg == NULL) {
+                                LOG_ERR("Ap_reg unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_ap_reg(
+                                msg->ap_name, msg->reg_ap_id);
+                        break;
+                case IPCP_MSG_CODE__IPCP_AP_UNREG:
+                        if (_ipcp->ops->ipcp_ap_unreg == NULL) {
+                                LOG_ERR("Ap_unreg unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_ap_unreg(
+                                msg->reg_ap_id);
+                        break;
+                case IPCP_MSG_CODE__IPCP_FLOW_ALLOC:
+                        if (_ipcp->ops->ipcp_flow_alloc == NULL) {
+                                LOG_ERR("Flow_alloc unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_flow_alloc(
+                                msg->port_id,
+                                msg->dst_ap_name,
+                                msg->ap_name,
+                                msg->ae_name,
+                                NULL);
+                        break;
+                case IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP:
+                        if (_ipcp->ops->ipcp_flow_alloc_resp == NULL) {
+                                LOG_ERR("Flow_alloc_resp unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_flow_alloc_resp(
+                                msg->port_id, msg->result);
+                        break;
+                case IPCP_MSG_CODE__IPCP_FLOW_DEALLOC:
+                        if (_ipcp->ops->ipcp_flow_dealloc == NULL) {
+                                LOG_ERR("Flow_dealloc unsupported.");
+                                break;
+                        }
+                        ret_msg.has_result = true;
+                        ret_msg.result = _ipcp->ops->ipcp_flow_dealloc(
+                                msg->port_id);
+                        break;
+                default:
+                        LOG_ERR("Don't know that message code");
+                        break;
+                }
+
+                ipcp_msg__free_unpacked(msg, NULL);
+
+                buffer.size = ipcp_msg__get_packed_size(&ret_msg);
+                if (buffer.size == 0) {
+                        LOG_ERR("Failed to send reply message");
+                        close(lsockfd);
+                        continue;
+                }
+
+                buffer.data = malloc(buffer.size);
+                if (buffer.data == NULL) {
+                        close(lsockfd);
+                        continue;
+                }
+
+                ipcp_msg__pack(&ret_msg, buffer.data);
+
+                if (write(lsockfd, buffer.data, buffer.size) == -1) {
+                        free(buffer.data);
+                        close(lsockfd);
+                        continue;
+                }
+
+                free(buffer.data);
+                close(lsockfd);
+        }
+
+        return 0;
+}
diff --git a/src/ipcpd/ipcp.h b/src/ipcpd/ipcp.h
new file mode 100644
index 00000000..9decac8b
--- /dev/null
+++ b/src/ipcpd/ipcp.h
@@ -0,0 +1,49 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * IPC process structure
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * 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 IPCPD_IPCP_H
+#define IPCPD_IPCP_H
+
+#include "ipcp-ops.h"
+#include "ipcp-data.h"
+
+enum ipcp_state {
+        IPCP_INIT = 0,
+        IPCP_ENROLLING,
+        IPCP_BOOTSTRAPPING,
+        IPCP_ENROLLED,
+        IPCP_DISCONNECTED,
+        IPCP_SHUTDOWN
+};
+
+struct ipcp {
+        struct ipcp_data * data;
+        struct ipcp_ops *  ops;
+
+        enum ipcp_state    state;
+        int                irmd_fd;
+};
+
+int ipcp_main_loop();
+int ipcp_arg_check(int argc, char * argv[]);
+
+#endif
diff --git a/src/ipcpd/normal/CMakeLists.txt b/src/ipcpd/normal/CMakeLists.txt
new file mode 100644
index 00000000..c13cbaa3
--- /dev/null
+++ b/src/ipcpd/normal/CMakeLists.txt
@@ -0,0 +1,32 @@
+get_filename_component(CURRENT_SOURCE_PARENT_DIR ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(CURRENT_BINARY_PARENT_DIR ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CURRENT_SOURCE_PARENT_DIR})
+include_directories(${CURRENT_BINARY_PARENT_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+SET(IPCP_NORMAL_TARGET ipcpd-normal CACHE STRING "IPCP_NORMAL_TARGET")
+
+set(SOURCE_FILES
+        # Add source files here
+        main.c
+        pci.c
+)
+
+add_executable (ipcpd-normal ${SOURCE_FILES} ${IPCP_SOURCES})
+target_link_libraries (ipcpd-normal LINK_PUBLIC ouroboros)
+
+include(MacroAddCompileFlags)
+if (CMAKE_BUILD_TYPE MATCHES Debug)
+   MACRO_ADD_COMPILE_FLAGS(ipcpd-normal -DCONFIG_OUROBOROS_DEBUG)
+endif (CMAKE_BUILD_TYPE MATCHES Debug)
+
+install(TARGETS ipcpd-normal RUNTIME DESTINATION bin)
+
+# Enable once ipcp-normal has tests
+# add_subdirectory(tests)
diff --git a/src/ipcpd/dt_const.h b/src/ipcpd/normal/dt_const.h
index bc0c1466..bc0c1466 100644
--- a/src/ipcpd/dt_const.h
+++ b/src/ipcpd/normal/dt_const.h
diff --git a/src/ipcpd/main.c b/src/ipcpd/normal/main.c
index 7ffd1c48..7ffd1c48 100644
--- a/src/ipcpd/main.c
+++ b/src/ipcpd/normal/main.c
diff --git a/src/ipcpd/pci.c b/src/ipcpd/normal/pci.c
index 548e40e2..d7df52b6 100644
--- a/src/ipcpd/pci.c
+++ b/src/ipcpd/normal/pci.c
@@ -22,7 +22,7 @@
  */
 
 #include "pci.h"
-#include <malloc.h>
+#include <stdlib.h>
 #include <errno.h>
 
 #define OUROBOROS_PREFIX "ipcp/pci"
diff --git a/src/ipcpd/pci.h b/src/ipcpd/normal/pci.h
index 3c011723..3c011723 100644
--- a/src/ipcpd/pci.h
+++ b/src/ipcpd/normal/pci.h
diff --git a/src/ipcpd/shm_pci.c b/src/ipcpd/normal/shm_pci.c
index d44e0e8f..e76d8009 100644
--- a/src/ipcpd/shm_pci.c
+++ b/src/ipcpd/normal/shm_pci.c
@@ -22,7 +22,7 @@
  */
 
 #include "shm_pci.h"
-#include <malloc.h>
+#include <stdlib.h>
 #include <errno.h>
 
 #define SHM_PCI_HEAD_SIZE(a, b) a.addr_size * 2 +  \
diff --git a/src/ipcpd/shm_pci.h b/src/ipcpd/normal/shm_pci.h
index cb8dd5dd..cb8dd5dd 100644
--- a/src/ipcpd/shm_pci.h
+++ b/src/ipcpd/normal/shm_pci.h
diff --git a/src/ipcpd/shim-udp/CMakeLists.txt b/src/ipcpd/shim-udp/CMakeLists.txt
new file mode 100644
index 00000000..27907880
--- /dev/null
+++ b/src/ipcpd/shim-udp/CMakeLists.txt
@@ -0,0 +1,31 @@
+get_filename_component(CURRENT_SOURCE_PARENT_DIR ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(CURRENT_BINARY_PARENT_DIR ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CURRENT_SOURCE_PARENT_DIR})
+include_directories(${CURRENT_BINARY_PARENT_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+SET(IPCP_SHIM_UDP_TARGET ipcpd-shim-udp CACHE STRING "IPCP_SHIM_UDP_TARGET")
+
+set(SHIM_UDP_SOURCES
+        # Add source files here
+        ${CMAKE_CURRENT_SOURCE_DIR}/main.c
+)
+
+add_executable (ipcpd-shim-udp ${SHIM_UDP_SOURCES} ${IPCP_SOURCES})
+target_link_libraries (ipcpd-shim-udp LINK_PUBLIC ouroboros)
+
+include(MacroAddCompileFlags)
+if (CMAKE_BUILD_TYPE MATCHES Debug)
+   MACRO_ADD_COMPILE_FLAGS(ipcpd-shim-udp -DCONFIG_OUROBOROS_DEBUG)
+endif (CMAKE_BUILD_TYPE MATCHES Debug)
+
+install(TARGETS ipcpd-shim-udp RUNTIME DESTINATION bin)
+
+# Enable once ipcp-shim-udp has tests
+add_subdirectory(tests)
diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c
new file mode 100644
index 00000000..45620ee9
--- /dev/null
+++ b/src/ipcpd/shim-udp/main.c
@@ -0,0 +1,324 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Shim IPC process over UDP
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * 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/config.h>
+
+#include "ipcp.h"
+#include <ouroboros/shm_du_map.h>
+#include <ouroboros/list.h>
+#include <ouroboros/flow.h>
+#include <ouroboros/utils.h>
+#include <ouroboros/ipcp.h>
+#include <ouroboros/dif_config.h>
+
+#define OUROBOROS_PREFIX "ipcpd/shim-udp"
+
+#include <ouroboros/logs.h>
+
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <pthread.h>
+
+#define THIS_TYPE IPCP_SHIM_UDP
+
+#define shim_data(type) ((struct ipcp_udp_data *) type->data)
+
+/* global for trapping signal */
+int irmd_pid;
+
+/* this IPCP's data */
+#ifdef MAKE_CHECK
+extern struct ipcp * _ipcp; /* defined in test */
+#else
+struct ipcp * _ipcp;
+#endif
+
+struct ipcp_udp_data {
+        /* IPCP_DATA STRUCT MUST BE FIRST!! */
+        struct ipcp_data ipcp_data;
+
+        uint32_t ip_addr;
+        uint32_t dns_addr;
+
+        pthread_mutex_t   lock;
+};
+
+struct udp_flow {
+        /* FLOW MUST BE FIRST !!!! */
+        flow_t flow;
+
+        uint16_t localport;
+
+        struct sockaddr_in * remote;
+        int    fd;
+};
+
+void ipcp_sig_handler(int sig, siginfo_t * info, void * c)
+{
+        switch(sig) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                LOG_DBG("Terminating by order of %d. Bye.", info->si_pid);
+                if (info->si_pid == irmd_pid) {
+                        shm_du_map_close(_ipcp->data->dum);
+                        exit(0);
+                }
+        default:
+                return;
+        }
+}
+
+struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name,
+                                            char * ap_id)
+{
+        struct ipcp_udp_data * udp_data;
+        struct ipcp_data *     data;
+        instance_name_t *      instance_name;
+        enum ipcp_type         ipcp_type;
+
+        instance_name = instance_name_create();
+        if (instance_name  == NULL) {
+                LOG_ERR("Failed to create instance name struct.");
+                return NULL;
+        }
+
+        instance_name = instance_name_init_with(
+                instance_name, ap_name, (uint16_t)atoi(ap_id));
+
+        if (instance_name  == NULL) {
+                LOG_ERR("Failed to create instance name struct.");
+                return NULL;
+        }
+
+        udp_data= malloc (sizeof *udp_data);
+        if (udp_data == NULL) {
+                LOG_DBGF("Failed to allocate.");
+                return NULL;
+        }
+
+        ipcp_type = THIS_TYPE;
+        data = (struct ipcp_data *) udp_data;
+        if (ipcp_data_init(data, instance_name, ipcp_type) == NULL) {
+                free(udp_data);
+                return NULL;
+        }
+
+        return udp_data;
+}
+
+int ipcp_udp_bootstrap(struct dif_config * conf)
+{
+        char ipstr[INET_ADDRSTRLEN];
+        char dnsstr[INET_ADDRSTRLEN];
+
+        if (conf->type != THIS_TYPE) {
+                LOG_ERR("Config doesn't match IPCP type.");
+                return -1;
+        }
+
+        if (_ipcp->state != IPCP_INIT) {
+                LOG_ERR("IPCP in wrong state.");
+                return -1;
+        }
+
+        inet_ntop(AF_INET,
+                  &conf->ip_addr,
+                  ipstr,
+                  INET_ADDRSTRLEN);
+
+        if (conf->dns_addr != 0)
+                inet_ntop(AF_INET,
+                          &conf->dns_addr,
+                          dnsstr,
+                          INET_ADDRSTRLEN);
+        else
+                strcpy(dnsstr, "not set");
+
+        shim_data(_ipcp)->ip_addr  = conf->ip_addr;
+        shim_data(_ipcp)->dns_addr = conf->dns_addr;
+
+        _ipcp->state = IPCP_ENROLLED;
+
+        LOG_DBG("Bootstrapped shim IPCP over UDP %s-%d.",
+                _ipcp->data->iname->name, _ipcp->data->iname->id);
+
+        LOG_DBG("Bound to IP address %s.", ipstr);
+        LOG_DBG("DNS server address is %s.", dnsstr);
+
+        return 0;
+}
+
+int ipcp_udp_ap_reg(char * ap_name, uint32_t reg_ap_id)
+{
+        LOG_DBG("Registering local ap %s, %u.", ap_name, reg_ap_id);
+
+        if (_ipcp->state != IPCP_ENROLLED) {
+                LOG_DBGF("Won't register with non-enrolled IPCP.");
+                return -1;
+        }
+
+        if (ipcp_data_add_reg_entry(_ipcp->data, ap_name, reg_ap_id)) {
+                LOG_ERR("Failed to add AP to local registry.");
+                return -1;
+        }
+
+        LOG_MISSING;
+
+        return 0;
+}
+
+int ipcp_udp_ap_unreg(uint32_t reg_ap_id)
+{
+        char * name  = strdup(ipcp_data_get_reg_ap_name(_ipcp->data,
+                                                        reg_ap_id));
+        LOG_DBG("Unregistering %s.", name);
+
+        ipcp_data_del_reg_entry(_ipcp->data, reg_ap_id);
+
+        /* we are using dns */
+        LOG_MISSING;
+
+        free (name);
+
+        return 0;
+}
+
+int ipcp_udp_flow_alloc(uint32_t          port_id,
+                        char *            dst_ap_name,
+                        char *            src_ap_name,
+                        char *            src_ae_name,
+                        struct qos_spec * qos)
+{
+        return 0;
+}
+int ipcp_udp_flow_alloc_resp(uint32_t port_id,
+                             int      result)
+{
+        return 0;
+}
+
+int ipcp_udp_flow_dealloc(uint32_t port_id)
+{
+        return 0;
+}
+
+int ipcp_udp_du_write(uint32_t port_id,
+                      size_t map_index)
+{
+        return 0;
+}
+
+int ipcp_udp_du_read(uint32_t port_id,
+                     size_t map_index)
+{
+        return 0;
+}
+
+struct ipcp * ipcp_udp_create(char * ap_name, char * i_id)
+{
+        struct ipcp * i;
+        struct ipcp_udp_data * data;
+        struct ipcp_ops *      ops;
+
+        i = malloc(sizeof *i);
+        if (i == NULL)
+                return NULL;
+
+        data = ipcp_udp_data_create(ap_name, i_id);
+        if (data == NULL) {
+                free(i);
+                return NULL;
+        }
+
+        ops = malloc (sizeof *ops);
+        if (ops == NULL) {
+                free(data);
+                free(i);
+                return NULL;
+        }
+
+        ops->ipcp_bootstrap       = ipcp_udp_bootstrap;
+        ops->ipcp_enroll          = NULL;                       /* shim */
+        ops->ipcp_reg             = NULL;                       /* shim */
+        ops->ipcp_unreg           = NULL;                       /* shim */
+        ops->ipcp_ap_reg          = ipcp_udp_ap_reg;
+        ops->ipcp_ap_unreg        = ipcp_udp_ap_unreg;
+        ops->ipcp_flow_alloc      = ipcp_udp_flow_alloc;
+        ops->ipcp_flow_alloc_resp = ipcp_udp_flow_alloc_resp;
+        ops->ipcp_flow_dealloc    = ipcp_udp_flow_dealloc;
+        ops->ipcp_du_read         = ipcp_udp_du_read;
+        ops->ipcp_du_write        = ipcp_udp_du_write;
+
+        i->data = (struct ipcp_data *) data;
+        i->ops  = ops;
+
+        i->state = IPCP_INIT;
+
+        return i;
+}
+
+#ifndef MAKE_CHECK
+
+int main (int argc, char * argv[])
+{
+        /* argument 1: pid of irmd ? */
+        /* argument 2: ap name */
+        /* argument 3: instance id */
+        struct sigaction sig_act;
+
+        if (ipcp_arg_check(argc, argv)) {
+                LOG_ERR("Wrong arguments.");
+                exit(1);
+        }
+
+        /* store the process id of the irmd */
+        irmd_pid = atoi(argv[1]);
+
+        /* init sig_act */
+        memset (&sig_act, 0, sizeof sig_act);
+
+        /* install signal traps */
+        sig_act.sa_sigaction = &ipcp_sig_handler;
+        sig_act.sa_flags     = SA_SIGINFO;
+
+        sigaction(SIGINT,  &sig_act, NULL);
+        sigaction(SIGTERM, &sig_act, NULL);
+        sigaction(SIGHUP,  &sig_act, NULL);
+
+        _ipcp = ipcp_udp_create(argv[2], argv[3]);
+        if (_ipcp == NULL) {
+                LOG_ERR("Won't.");
+                exit(1);
+        }
+
+        ipcp_main_loop(_ipcp);
+
+        exit(0);
+}
+
+#endif /* MAKE_CHECK */
diff --git a/src/ipcpd/shim-udp/tests/CMakeLists.txt b/src/ipcpd/shim-udp/tests/CMakeLists.txt
new file mode 100644
index 00000000..bdd7defb
--- /dev/null
+++ b/src/ipcpd/shim-udp/tests/CMakeLists.txt
@@ -0,0 +1,33 @@
+get_filename_component(PARENT_SOURCE_PATH ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(PARENT_BINARY_PATH ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)
+get_filename_component(PARENT_DIR ${PARENT_SOURCE_PATH} NAME)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${PARENT_SOURCE_PATH})
+include_directories(${PARENT_BINARY_PATH})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
+                       # Add new tests here
+                       shim_udp_test.c
+)
+
+add_executable(${PARENT_DIR}_test EXCLUDE_FROM_ALL ${IPCP_SOURCES} ${${PARENT_DIR}_tests})
+target_link_libraries(${PARENT_DIR}_test ouroboros)
+
+include(MacroAddCompileFlags)
+MACRO_ADD_COMPILE_FLAGS(${PARENT_DIR}_test -DMAKE_CHECK)
+
+add_dependencies(check ${PARENT_DIR}_test)
+
+set(tests_to_run ${${PARENT_DIR}_tests})
+remove(tests_to_run test_suite.c)
+
+foreach(test ${tests_to_run})
+  get_filename_component(test_name ${test} NAME_WE)
+  add_test(${test_name} ${C_TEST_PATH}/${PARENT_DIR}_test ${test_name})
+endforeach(test)
diff --git a/src/ipcpd/shim-udp/tests/shim_udp_test.c b/src/ipcpd/shim-udp/tests/shim_udp_test.c
new file mode 100644
index 00000000..427d0e1e
--- /dev/null
+++ b/src/ipcpd/shim-udp/tests/shim_udp_test.c
@@ -0,0 +1,103 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Test of the Shim UDP IPCP Daemon
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * 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/config.h>
+#include <ouroboros/dif_config.h>
+#include <ouroboros/utils.h>
+#include <ouroboros/shm_du_map.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include "main.c"
+
+#include <ouroboros/logs.h>
+
+struct ipcp * _ipcp;
+
+int shim_udp_test(int argc, char ** argv)
+{
+        /* argument 1: pid of irmd ? */
+        /* argument 2: ap name */
+        /* argument 3: instance id */
+        struct shm_du_map * dum;
+        char * ipcp_name = "test-shim-ipcp";
+        char * i_id = "1";
+        int i = 0;
+
+        char bogus[15];
+        memset (&bogus, 0, 15);
+
+        struct dif_config conf;
+        memset (&conf, 0, sizeof conf);
+        conf.dif_name = strdup("test-dif");
+        conf.type = IPCP_SHIM_UDP;
+        conf.ip_addr = 0;
+
+        dum = shm_du_map_create();
+        if (dum == NULL) {
+                LOG_ERR("Failed to create shared memory.");
+                exit(1);
+        }
+
+        _ipcp = ipcp_udp_create(ipcp_name, i_id);
+        if (_ipcp == NULL) {
+                LOG_ERR("Could not instantiate shim IPCP.");
+                shm_du_map_close(dum);
+                exit(1);
+        }
+
+        if (ipcp_udp_bootstrap (&conf)) {
+                LOG_ERR("Could not bootstrap.");
+        }
+
+        if(ipcp_udp_ap_reg("bogus ap", 1865)) {
+                LOG_ERR("Failed to register application.");
+                shm_du_map_close(dum);
+                exit(1);
+        }
+
+        if (ipcp_udp_ap_unreg(1865)) {
+                LOG_ERR("Failed to unregister application.");
+                shm_du_map_close(dum);
+                exit(1);
+        }
+
+        for (i = 0; i  < 1000; ++i) {
+                sprintf (bogus, "bogus ap %4d", i);
+                if(ipcp_udp_ap_reg(bogus, i)) {
+                         LOG_ERR("Failed to register application %s.", bogus);
+                         shm_du_map_close(dum);
+                         exit(1);
+                }
+        }
+
+        for (i = 0; i  < 1000; ++i) {
+                if(ipcp_udp_ap_unreg(i)) {
+                         LOG_ERR("Failed to unregister application %d.", i);
+                         shm_du_map_close(dum);
+                         exit(1);
+                }
+        }
+
+        shm_du_map_close(dum);
+
+        exit(0);
+}
diff --git a/src/irmd/main.c b/src/irmd/main.c
index 1f1c4839..13076cd1 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -22,6 +22,7 @@
 
 #define OUROBOROS_PREFIX "irmd"
 
+#include <ouroboros/config.h>
 #include <ouroboros/logs.h>
 #include <ouroboros/common.h>
 #include <ouroboros/sockets.h>
@@ -32,11 +33,14 @@
 #include <ouroboros/instance_name.h>
 #include <ouroboros/utils.h>
 #include <ouroboros/dif_config.h>
+#include <ouroboros/shm_du_map.h>
 
 #include <sys/socket.h>
 #include <sys/un.h>
+#include <signal.h>
 #include <stdlib.h>
 #include <errno.h>
+#include <string.h>
 
 struct ipcp_entry {
         struct list_head  next;
@@ -50,6 +54,7 @@ struct irm {
 };
 
 struct irm * instance = NULL;
+struct shm_du_map * dum;
 
 static pid_t find_pid_by_ipcp_name(instance_name_t * api)
 {
@@ -59,8 +64,6 @@ static pid_t find_pid_by_ipcp_name(instance_name_t * api)
                 struct ipcp_entry * tmp =
                         list_entry(pos, struct ipcp_entry, next);
 
-                LOG_DBG("name is %s", api->name);
-
                 if (instance_name_cmp(api, tmp->api) == 0)
                         return tmp->pid;
         }
@@ -97,8 +100,9 @@ static int create_ipcp(instance_name_t * api,
         }
 
         tmp = malloc(sizeof(*tmp));
-        if (tmp == NULL)
+        if (tmp == NULL) {
                 return -1;
+        }
 
         INIT_LIST_HEAD(&tmp->next);
 
@@ -330,12 +334,45 @@ static int flow_dealloc_ipcp(uint32_t port_id)
         return -1;
 }
 
-/* FIXME: Close sockfd on closing and release irm */
+void irmd_sig_handler(int sig, siginfo_t * info, void * c)
+{
+        switch(sig) {
+        case SIGINT:
+        case SIGTERM:
+        case SIGHUP:
+                shm_du_map_close(dum);
+                free(instance);
+                exit(0);
+        default:
+                return;
+        }
+}
+
 int main()
 {
         int     sockfd;
         uint8_t buf[IRM_MSG_BUF_SIZE];
 
+        struct sigaction sig_act;
+
+        /* init sig_act */
+        memset (&sig_act, 0, sizeof sig_act);
+
+        /* install signal traps */
+        sig_act.sa_sigaction = &irmd_sig_handler;
+        sig_act.sa_flags     = SA_SIGINFO;
+
+        sigaction(SIGINT,  &sig_act, NULL);
+        sigaction(SIGTERM, &sig_act, NULL);
+        sigaction(SIGHUP,  &sig_act, NULL);
+
+
+        if (access("/dev/shm/" SHM_DU_MAP_FILENAME, F_OK) != -1)
+                unlink("/dev/shm/" SHM_DU_MAP_FILENAME);
+
+        if ((dum = shm_du_map_create()) == NULL)
+                return -1;
+
         instance = malloc(sizeof(*instance));
         if (instance == NULL)
                 return -1;
@@ -343,8 +380,10 @@ int main()
         INIT_LIST_HEAD(&instance->ipcps);
 
         sockfd = server_socket_open(IRM_SOCK_PATH);
-        if (sockfd < 0)
+        if (sockfd < 0) {
+                free(instance);
                 return -1;
+        }
 
         while (true) {
                 int cli_sockfd;
diff --git a/src/lib/dif_config.proto b/src/lib/dif_config.proto
index 87cb222f..05b35ea7 100644
--- a/src/lib/dif_config.proto
+++ b/src/lib/dif_config.proto
@@ -1,16 +1,17 @@
 message dif_config_msg {
-        required string dif_name = 1;
-        required int32 ipcp_type = 2;
+        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;
+        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;
+        optional uint32 ip_addr         = 12;
+        optional uint32 dns_addr        = 13;
 }
\ No newline at end of file
diff --git a/src/lib/flow.c b/src/lib/flow.c
index 593bef1a..da0ca148 100644
--- a/src/lib/flow.c
+++ b/src/lib/flow.c
@@ -35,9 +35,11 @@ flow_t * flow_create(int32_t port_id)
                 return NULL;
         }
 
+        INIT_LIST_HEAD(&flow->list);
+
         flow->port_id = port_id;
         flow->oflags = FLOW_O_DEFAULT;
-        flow->state = FLOW_INIT;
+        flow->state = FLOW_NULL;
 
         pthread_mutex_init(&flow->lock, NULL);
 
@@ -46,6 +48,8 @@ flow_t * flow_create(int32_t port_id)
 
 void flow_destroy(flow_t * flow)
 {
+        if (flow == NULL)
+                return;
         free(flow);
 }
 
diff --git a/src/lib/ipcp.c b/src/lib/ipcp.c
index a0febe4e..338d8683 100644
--- a/src/lib/ipcp.c
+++ b/src/lib/ipcp.c
@@ -61,7 +61,7 @@ static ipcp_msg_t * send_recv_ipcp_msg(pid_t pid,
                return NULL;
        }
 
-       buf.data = malloc(buf.size);
+       buf.data = malloc(IPCP_MSG_BUF_SIZE);
        if (buf.data == NULL) {
                close(sockfd);
                free(sock_path);
@@ -103,10 +103,14 @@ pid_t ipcp_create(instance_name_t * api,
                   enum ipcp_type    ipcp_type)
 {
         pid_t pid = 0;
+        char irmd_pid[10];
         char * api_id = NULL;
         size_t len = 0;
-        char * ipcp_dir = "bin/ipcpd";
+        char * ipcp_dir = "bin";
         char * full_name = NULL;
+        char * exec_name = NULL;
+
+        sprintf (irmd_pid, "%u", getpid());
 
         pid = fork();
         if (pid == -1) {
@@ -125,10 +129,21 @@ pid_t ipcp_create(instance_name_t * api,
         }
         sprintf(api_id, "%d", api->id);
 
+        if (ipcp_type == IPCP_NORMAL)
+                exec_name = IPCP_NORMAL_EXEC;
+        else if (ipcp_type == IPCP_SHIM_UDP)
+                exec_name = IPCP_SHIM_UDP_EXEC;
+        else {
+                free(api_id);
+                exit(EXIT_FAILURE);
+        }
+
         len += strlen(INSTALL_DIR);
         len += strlen(ipcp_dir);
-        len += 2;
-        full_name = malloc(len);
+        len += strlen(exec_name);
+        len += 3;
+
+        full_name = malloc(len + 1);
         if (full_name == NULL) {
                 LOG_ERR("Failed to malloc");
                 free(api_id);
@@ -138,9 +153,16 @@ pid_t ipcp_create(instance_name_t * api,
         strcpy(full_name, INSTALL_DIR);
         strcat(full_name, "/");
         strcat(full_name, ipcp_dir);
+        strcat(full_name, "/");
+        strcat(full_name, exec_name);
+        full_name[len] = '\0';
+
+        LOG_DBG("Full name is %s", full_name);
 
         char * argv[] = {full_name,
-                         api->name, api_id,
+                         irmd_pid,
+                         api->name,
+                         api_id,
                          0};
 
         char * envp[] = {0};
@@ -172,22 +194,22 @@ int ipcp_destroy(pid_t pid)
         return 0;
 }
 
-int ipcp_reg(pid_t pid,
-             char ** difs,
-             size_t difs_size)
+int ipcp_reg(pid_t   pid,
+             char ** dif_names,
+             size_t  len)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (difs == NULL ||
-            difs_size == 0 ||
-            difs[0] == NULL)
+        if (dif_names == NULL ||
+            len == 0 ||
+            dif_names[0] == NULL)
                 return -EINVAL;
 
-        msg.code = IPCP_MSG_CODE__IPCP_REG;
-        msg.dif_name = difs;
-        msg.n_dif_name = difs_size;
+        msg.code       = IPCP_MSG_CODE__IPCP_REG;
+        msg.dif_names  = dif_names;
+        msg.len        = len;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -205,21 +227,21 @@ int ipcp_reg(pid_t pid,
 }
 
 int ipcp_unreg(pid_t pid,
-               char ** difs,
-               size_t difs_size)
+               char ** dif_names,
+               size_t len)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (difs == NULL ||
-            difs_size == 0 ||
-            difs[0] == NULL)
+        if (dif_names == NULL ||
+            len == 0 ||
+            dif_names[0] == NULL)
                 return -EINVAL;
 
-        msg.code = IPCP_MSG_CODE__IPCP_UNREG;
-        msg.dif_name = difs;
-        msg.n_dif_name = difs_size;
+        msg.code       = IPCP_MSG_CODE__IPCP_UNREG;
+        msg.dif_names  = dif_names;
+        msg.len        = len;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -276,36 +298,36 @@ int ipcp_enroll(pid_t pid,
         if (n_1_dif == NULL || member_name == NULL)
                 return -EINVAL;
 
-        msg.code = IPCP_MSG_CODE__IPCP_ENROLL;
-        msg.dif_name = malloc(sizeof(*(msg.dif_name)));
-        if (msg.dif_name == NULL) {
-                LOG_ERR("Failed to malloc");
+        msg.code        = IPCP_MSG_CODE__IPCP_ENROLL;
+        msg.member_name = malloc(sizeof(*(msg.member_name)));
+        if (msg.member_name == NULL) {
+                LOG_ERR("Failed to malloc.");
                 return -1;
         }
-        msg.dif_name[0] = n_1_dif;
-        msg.ap_name = member_name;
+        msg.n_1_dif     = n_1_dif;
+        msg.member_name = member_name;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL) {
-                free(msg.dif_name);
+                free(msg.member_name);
                 return -1;
         }
 
         if (recv_msg->has_result == false) {
                 ipcp_msg__free_unpacked(recv_msg, NULL);
-                free(msg.dif_name);
+                free(msg.member_name);
                 return -1;
         }
 
         ret = recv_msg->result;
         ipcp_msg__free_unpacked(recv_msg, NULL);
-        free(msg.dif_name);
+        free(msg.member_name);
 
         return ret;
 }
 
 int ipcp_ap_reg(pid_t    pid,
-                uint32_t reg_api_id,
+                uint32_t reg_ap_id,
                 char *   ap_name)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
@@ -315,10 +337,10 @@ int ipcp_ap_reg(pid_t    pid,
         if (ap_name == NULL)
                 return -1;
 
-        msg.code = IPCP_MSG_CODE__IPCP_AP_REG;
-        msg.ap_name = ap_name;
-        msg.has_port_id = true;
-        msg.port_id = reg_api_id;
+        msg.code          = IPCP_MSG_CODE__IPCP_AP_REG;
+        msg.ap_name       = ap_name;
+        msg.has_reg_ap_id = true;
+        msg.reg_ap_id     = reg_ap_id;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -336,15 +358,15 @@ int ipcp_ap_reg(pid_t    pid,
 }
 
 int ipcp_ap_unreg(pid_t    pid,
-                  uint32_t reg_api_id)
+                  uint32_t reg_ap_id)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.code = IPCP_MSG_CODE__IPCP_AP_UNREG;
-        msg.has_port_id = true;
-        msg.port_id = reg_api_id;
+        msg.code          = IPCP_MSG_CODE__IPCP_AP_UNREG;
+        msg.has_reg_ap_id = true;
+        msg.reg_ap_id     = reg_ap_id;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -375,12 +397,12 @@ int ipcp_flow_alloc(pid_t             pid,
         if (dst_ap_name == NULL || src_ap_name == NULL || src_ae_name == NULL)
                 return -EINVAL;
 
-        msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC;
-        msg.ap_name = src_ap_name;
-        msg.ae_name = src_ae_name;
+        msg.code        = IPCP_MSG_CODE__IPCP_FLOW_ALLOC;
+        msg.ap_name     = src_ap_name;
+        msg.ae_name     = src_ae_name;
         msg.dst_ap_name = dst_ap_name;
+        msg.port_id     = port_id;
         msg.has_port_id = true;
-        msg.port_id = port_id;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -405,11 +427,11 @@ int ipcp_flow_alloc_resp(pid_t    pid,
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.code = IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP;
+        msg.code        = IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP;
         msg.has_port_id = true;
-        msg.port_id = port_id;
-        msg.has_result = true;
-        msg.result = result;
+        msg.port_id     = port_id;
+        msg.has_result  = true;
+        msg.result      = result;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -427,7 +449,7 @@ int ipcp_flow_alloc_resp(pid_t    pid,
 }
 
 int ipcp_flow_req_arr(pid_t    pid,
-                      uint32_t reg_api_id,
+                      uint32_t reg_ap_id,
                       char *   ap_name,
                       char *   ae_name)
 {
@@ -438,13 +460,13 @@ int ipcp_flow_req_arr(pid_t    pid,
         if (ap_name == NULL || ae_name == NULL)
                 return -EINVAL;
 
-        msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
-        msg.ap_name = ap_name;
-        msg.ae_name = ae_name;
-        msg.port_id = reg_api_id;
-        msg.has_port_id = true;
-        msg.pid = pid;
-        msg.has_pid = true;
+        msg.code          = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
+        msg.ap_name       = ap_name;
+        msg.ae_name       = ae_name;
+        msg.reg_ap_id     = reg_ap_id;
+        msg.has_reg_ap_id = true;
+        msg.pid           = pid;
+        msg.has_pid       = true;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -469,11 +491,11 @@ int ipcp_flow_alloc_reply(pid_t    pid,
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.code = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
-        msg.port_id = port_id;
+        msg.code        = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
+        msg.port_id     = port_id;
         msg.has_port_id = true;
-        msg.result = result;
-        msg.has_result = true;
+        msg.result      = result;
+        msg.has_result  = true;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
diff --git a/src/lib/ipcpd_messages.proto b/src/lib/ipcpd_messages.proto
index b83c34c7..796638c7 100644
--- a/src/lib/ipcpd_messages.proto
+++ b/src/lib/ipcpd_messages.proto
@@ -14,12 +14,16 @@ enum ipcp_msg_code {
 };
 
 message ipcp_msg {
-        required ipcp_msg_code code = 1;
-        optional string ap_name = 2;
-        optional dif_config_msg conf = 3;
-        repeated string dif_name = 4;
-        optional int32 result = 5;
-        optional uint32 port_id = 6;
-        optional string ae_name = 7;
-        optional string dst_ap_name = 8;
+        required ipcp_msg_code code  =  1;
+        optional string member_name  =  2;
+        optional string n_1_dif      =  3;
+        repeated string dif_names    =  4;
+        optional int32  len          =  5;
+        optional string ap_name      =  6;
+        optional int32 reg_ap_id     =  7;
+        optional int32 port_id       =  8;
+        optional string dst_ap_name  =  9;
+        optional string ae_name      = 10;
+        optional dif_config_msg conf = 11;
+        optional int32 result        = 12;
 };
diff --git a/src/lib/irm.c b/src/lib/irm.c
index 70b7b3a5..b17cb04c 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -44,6 +44,7 @@ int irm_create_ipcp(instance_name_t * api,
         msg.ap_name = api->name;
         msg.has_api_id = true;
         msg.api_id = api->id;
+        msg.has_ipcp_type = true;
         msg.ipcp_type = ipcp_type;
 
         recv_msg = send_recv_irm_msg(&msg);
@@ -101,10 +102,10 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
         if (api == NULL || api->name == NULL || conf == NULL)
                 return -EINVAL;
 
-        msg.code = IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP;
-        msg.ap_name = api->name;
+        msg.code       = IRM_MSG_CODE__IRM_BOOTSTRAP_IPCP;
+        msg.ap_name    = api->name;
         msg.has_api_id = true;
-        msg.api_id = api->id;
+        msg.api_id     = api->id;
 
         msg.conf = &config;
         config.dif_name = conf->dif_name;
@@ -134,8 +135,9 @@ int irm_bootstrap_ipcp(instance_name_t   * api,
                 break;
         case IPCP_SHIM_UDP:
                 config.has_ip_addr = true;
-
                 config.ip_addr = conf->ip_addr;
+                config.has_dns_addr = true;
+                config.dns_addr = conf->dns_addr;
                 break;
         default:
                 return -1;
diff --git a/src/lib/irmd_messages.proto b/src/lib/irmd_messages.proto
index 3a2432f3..92ea439e 100644
--- a/src/lib/irmd_messages.proto
+++ b/src/lib/irmd_messages.proto
@@ -24,17 +24,18 @@ enum irm_msg_code {
 };
 
 message irm_msg {
-        required irm_msg_code code = 1;
-        optional string ap_name = 2;
-        optional uint32 api_id = 3;
-        optional string ae_name = 4;
-        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;
+        required irm_msg_code code   =  1;
+        optional string ap_name      =  2;
+        optional uint32 api_id       =  3;
+        optional string ae_name      =  4;
+        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 uint32 reg_ap_id    = 12;
+        optional int32 pid           = 13;
+        optional dif_config_msg conf = 14;
 };
diff --git a/src/lib/sockets.c b/src/lib/sockets.c
index 805dda39..4f777805 100644
--- a/src/lib/sockets.c
+++ b/src/lib/sockets.c
@@ -29,7 +29,6 @@
 
 #include <sys/socket.h>
 #include <sys/un.h>
-#include <sys/stat.h>
 #include <string.h>
 #include <stdlib.h>
 
@@ -61,9 +60,8 @@ int server_socket_open(char * file_name)
 {
         int sockfd;
         struct sockaddr_un serv_addr;
-        struct stat sb;
 
-        if (!stat(file_name, &sb)) {
+        if (access(file_name, F_OK) != -1) {
                 /* File exists */
                 if (unlink(file_name)) {
                         LOG_ERR("Failed to unlink filename: %s",
@@ -113,8 +111,7 @@ irm_msg_t * send_recv_irm_msg(irm_msg_t * msg)
                 return NULL;
         }
 
-        LOG_DBG("Size will be %lu", buf.size);
-        buf.data = malloc(buf.size);
+        buf.data = malloc(IRM_MSG_BUF_SIZE);
         if (buf.data == NULL) {
                 close(sockfd);
                 return NULL;
diff --git a/src/lib/utils.c b/src/lib/utils.c
index 77a2d44c..5744fb7c 100644
--- a/src/lib/utils.c
+++ b/src/lib/utils.c
@@ -28,7 +28,7 @@ int n_digits(unsigned i)
     int n = 1;
 
     while (i > 9) {
-        n++;
+        ++n;
         i /= 10;
     }
 
diff --git a/src/tools/irm/irm_bootstrap_ipcp.c b/src/tools/irm/irm_bootstrap_ipcp.c
index 78a09362..b90e934f 100644
--- a/src/tools/irm/irm_bootstrap_ipcp.c
+++ b/src/tools/irm/irm_bootstrap_ipcp.c
@@ -43,6 +43,7 @@
 #define DEFAULT_CHK_SIZE 2
 #define DEFAULT_MIN_PDU_SIZE 0
 #define DEFAULT_MAX_PDU_SIZE 9000
+#define DEFAULT_DDNS 0
 
 static void usage()
 {
@@ -64,12 +65,14 @@ static void usage()
                "           [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",
+               "           ip <IP address in dotted notation>\n"
+               "           [dns <DDNS IP address in dotted notation>"
+               " (default = none: %d)]\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);
+               DEFAULT_MAX_PDU_SIZE, DEFAULT_DDNS);
 }
 
 int do_bootstrap_ipcp(int argc, char ** argv)
@@ -86,6 +89,7 @@ int do_bootstrap_ipcp(int argc, char ** argv)
         uint32_t min_pdu_size = DEFAULT_MIN_PDU_SIZE;
         uint32_t max_pdu_size = DEFAULT_MAX_PDU_SIZE;
         uint32_t ip_addr = 0;
+        uint32_t dns_addr = DEFAULT_DDNS;
         char * ipcp_type = NULL;
         char * dif_name = NULL;
 
@@ -103,6 +107,11 @@ int do_bootstrap_ipcp(int argc, char ** argv)
                                 usage();
                                 return -1;
                         }
+                } else if (matches(*argv, "dns") == 0) {
+                        if (inet_pton (AF_INET, *(argv + 1), &dns_addr) != 1) {
+                                usage();
+                                return -1;
+                        }
                 } else if (matches(*argv, "addr") == 0) {
                         addr_size = atoi(*(argv + 1));
                 } else if (matches(*argv, "cep_id") == 0) {
@@ -156,6 +165,7 @@ int do_bootstrap_ipcp(int argc, char ** argv)
                         return -1;
                 }
                 conf.ip_addr = ip_addr;
+                conf.dns_addr = dns_addr;
         } else {
                 usage();
                 return -1;