Merged in dstaesse/ouroboros/udp-dev (pull request #60)

shim-udp: flow allocation added

18 files changed, 938 insertions, 395 deletions

diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index 3198a882..e3c17bda 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -33,8 +33,8 @@
 struct ipcp;
 
 /* Returns the process id */
-pid_t ipcp_create(instance_name_t * api,
-                  enum ipcp_type    ipcp_type);
+pid_t ipcp_create(char *         ipcp_name,
+                  enum ipcp_type ipcp_type);
 
 int   ipcp_destroy(pid_t pid);
 
@@ -54,15 +54,14 @@ int   ipcp_bootstrap(pid_t pid,
 
 /* Flow related ops, these go from IRMd to IPCP */
 
-int   ipcp_ap_reg(pid_t    pid,
-                  uint32_t reg_api_id,
-                  char *   ap_name);
-int   ipcp_ap_unreg(pid_t    pid,
-                    uint32_t reg_api_id);
+int   ipcp_name_reg(pid_t    pid,
+                    char *   name);
+int   ipcp_name_unreg(pid_t    pid,
+                      char * name);
 
 int   ipcp_flow_alloc(pid_t             pid,
                       uint32_t          port_id,
-                      char *            dst_ap_name,
+                      char *            dst_name,
                       char *            src_ap_name,
                       char *            src_ae_name,
                       struct qos_spec * qos);
@@ -73,13 +72,13 @@ int   ipcp_flow_alloc_resp(pid_t    pid,
 /* These operations go from the IPCP to the IRMd */
 
 /* Returns the port_id */
-int   ipcp_flow_req_arr(pid_t    pid,
-                        uint32_t reg_api_id,
-                        char *   ap_name,
-                        char *   ae_name);
+int   ipcp_flow_req_arr(pid_t  pid,
+                        char * dst_name,
+                        char * src_ap_name,
+                        char * src_ae_name);
 int   ipcp_flow_alloc_reply(pid_t    pid,
                             uint32_t port_id,
-                            int      result);
+                            int      response);
 
 /*
  * This operation can go both ways
diff --git a/include/ouroboros/irm.h b/include/ouroboros/irm.h
index 24bb2c42..37524098 100644
--- a/include/ouroboros/irm.h
+++ b/include/ouroboros/irm.h
@@ -26,8 +26,10 @@
 #include <ouroboros/instance_name.h>
 #include <ouroboros/dif_config.h>
 
-int irm_create_ipcp(instance_name_t * api,
-                    enum ipcp_type    ipcp_type);
+#include <sys/types.h>
+
+pid_t irm_create_ipcp(char *         ipcp_name,
+                      enum ipcp_type ipcp_type);
 
 int irm_destroy_ipcp(instance_name_t * api);
 
diff --git a/src/ipcpd/ipcp-data.c b/src/ipcpd/ipcp-data.c
index 1828fda9..106226de 100644
--- a/src/ipcpd/ipcp-data.c
+++ b/src/ipcpd/ipcp-data.c
@@ -35,8 +35,7 @@
 
 struct reg_entry {
         struct list_head list;
-        char *           ap_name;
-        uint32_t         reg_ap_id;
+        char *           name;
 };
 
 struct dir_entry {
@@ -45,16 +44,14 @@ struct dir_entry {
         uint64_t   addr;
 };
 
-static struct reg_entry * reg_entry_create(const char * ap_name,
-                                           uint32_t     reg_ap_id)
+static struct reg_entry * reg_entry_create(const char * name)
 {
         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)
+        entry->name = strdup(name);
+        if (entry->name == NULL)
                 return NULL;
 
         return entry;
@@ -65,7 +62,7 @@ static void reg_entry_destroy(struct reg_entry * entry)
         if (entry == NULL)
                 return;
 
-        free(entry->ap_name);
+        free(entry->name);
         free(entry);
 }
 
@@ -107,18 +104,28 @@ 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)
+                                  const char *       ipcp_name,
+                                  enum ipcp_type     ipcp_type)
 {
         if (dst == NULL)
                 return NULL;
 
-        dst->iname = instance_name_dup(iname);
+        dst->iname = instance_name_create();
+        if (dst->iname == NULL)
+                return NULL;
+
+        if(instance_name_init_from(dst->iname, ipcp_name, getpid()) == NULL) {
+                instance_name_destroy(dst->iname);
+                return NULL;
+        }
+
         dst->type  = ipcp_type;
 
         dst->dum = shm_du_map_open();
-        if (dst->dum == NULL)
+        if (dst->dum == NULL) {
+                instance_name_destroy(dst->iname);
                 return NULL;
+        }
 
         /* init the lists */
         INIT_LIST_HEAD(&dst->registry);
@@ -194,25 +201,12 @@ void ipcp_data_destroy(struct ipcp_data * 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)
+                                                 const char *       name)
 {
         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)
+                if (!strcmp(e->name, name))
                         return e;
         }
 
@@ -253,7 +247,7 @@ bool ipcp_data_is_in_directory(struct ipcp_data * data,
 }
 
 int ipcp_data_del_reg_entry(struct ipcp_data * data,
-                            uint32_t           reg_ap_id)
+                            const char *       name)
 {
         struct reg_entry * e;
         if (data == NULL)
@@ -261,7 +255,7 @@ int ipcp_data_del_reg_entry(struct ipcp_data * data,
 
         pthread_mutex_lock(&data->reg_lock);
 
-        e = find_reg_entry_by_id(data, reg_ap_id);
+        e = find_reg_entry_by_name(data, name);
         if (e == NULL) {
                 pthread_mutex_unlock(&data->reg_lock);
                 return 0; /* nothing to do */
@@ -302,23 +296,21 @@ int ipcp_data_del_dir_entry(struct ipcp_data * data,
 }
 
 int ipcp_data_add_reg_entry(struct ipcp_data * data,
-                            char *             ap_name,
-                            uint32_t           reg_ap_id)
+                            const char *       name)
 {
         struct reg_entry * entry;
 
-        if (data == NULL || ap_name == NULL)
+        if (data == NULL || 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)) {
+        if (find_reg_entry_by_name(data, name)) {
                 pthread_mutex_unlock(&data->reg_lock);
                 return -2;
         }
 
-        entry = reg_entry_create(ap_name, reg_ap_id);
+        entry = reg_entry_create(name);
         if (entry == NULL) {
                 pthread_mutex_unlock(&data->reg_lock);
                 return -1;
@@ -332,7 +324,7 @@ int ipcp_data_add_reg_entry(struct ipcp_data * data,
 }
 
 int ipcp_data_add_dir_entry(struct ipcp_data * data,
-                            char *             ap_name,
+                            const char *       ap_name,
                             uint64_t           addr)
 {
         struct dir_entry * entry;
@@ -366,54 +358,6 @@ bool ipcp_data_is_in_registry(struct ipcp_data * data,
         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)
 {
diff --git a/src/ipcpd/ipcp-data.h b/src/ipcpd/ipcp-data.h
index 3f036ef5..1dea8c3c 100644
--- a/src/ipcpd/ipcp-data.h
+++ b/src/ipcpd/ipcp-data.h
@@ -53,27 +53,22 @@ struct ipcp_data {
 
 struct ipcp_data * ipcp_data_create();
 struct ipcp_data * ipcp_data_init(struct ipcp_data * dst,
-                                  instance_name_t *  iname,
+                                  const char *       ipcp_name,
                                   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);
+                                     const char *       name);
 int          ipcp_data_del_reg_entry(struct ipcp_data * data,
-                                     uint32_t           reg_ap_id);
+                                     const char *       name);
 int          ipcp_data_add_dir_entry(struct ipcp_data * data,
-                                     char *             ap_name,
+                                     const 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);
+                                      const char *       name);
 bool         ipcp_data_is_in_directory(struct ipcp_data * data,
                                        const char *       ap_name);
 uint64_t     ipcp_data_get_addr(struct ipcp_data * data,
diff --git a/src/ipcpd/ipcp-ops.h b/src/ipcpd/ipcp-ops.h
index 5c917229..2ccb2e59 100644
--- a/src/ipcpd/ipcp-ops.h
+++ b/src/ipcpd/ipcp-ops.h
@@ -36,9 +36,8 @@ struct ipcp_ops {
                            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_name_reg)(char *   name);
+        int   (* ipcp_name_unreg)(char * name);
         int   (* ipcp_flow_alloc)(uint32_t port_id,
                                   char *   dst_ap_name,
                                   char *   src_ap_name,
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 0b652ff6..23c432f1 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -31,7 +31,7 @@
 
 int ipcp_arg_check(int argc, char * argv[])
 {
-        if (argc != 4)
+        if (argc != 3)
                 return -1;
 
         /* argument 1: pid of irmd */
@@ -41,7 +41,6 @@ int ipcp_arg_check(int argc, char * argv[])
         /* name conformity responsibility of NMS */
 
         /* argument 2: ap name */
-        /* argument 3: instance id */
 
         return 0;
 }
@@ -151,35 +150,35 @@ int ipcp_main_loop(struct ipcp * _ipcp)
                         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) {
+                case IPCP_MSG_CODE__IPCP_NAME_REG:
+                        if (_ipcp->ops->ipcp_name_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);
+                        ret_msg.result = _ipcp->ops->ipcp_name_reg(
+                                msg->name);
                         break;
-                case IPCP_MSG_CODE__IPCP_AP_UNREG:
-                        if (_ipcp->ops->ipcp_ap_unreg == NULL) {
+                case IPCP_MSG_CODE__IPCP_NAME_UNREG:
+                        if (_ipcp->ops->ipcp_name_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);
+                        ret_msg.result = _ipcp->ops->ipcp_name_unreg(
+                                msg->name);
                         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(
+                        ret_msg.has_fd = true;
+                        ret_msg.fd = _ipcp->ops->ipcp_flow_alloc(
                                 msg->port_id,
-                                msg->dst_ap_name,
-                                msg->ap_name,
-                                msg->ae_name,
+                                msg->dst_name,
+                                msg->src_ap_name,
+                                msg->src_ae_name,
                                 NULL);
                         break;
                 case IPCP_MSG_CODE__IPCP_FLOW_ALLOC_RESP:
diff --git a/src/ipcpd/ipcp.h b/src/ipcpd/ipcp.h
index 9decac8b..f640d78b 100644
--- a/src/ipcpd/ipcp.h
+++ b/src/ipcpd/ipcp.h
@@ -26,6 +26,9 @@
 #include "ipcp-ops.h"
 #include "ipcp-data.h"
 
+/* needed to run over shim DIFs */
+#define ANONYMOUS_AP "__ANONYMOUS__"
+
 enum ipcp_state {
         IPCP_INIT = 0,
         IPCP_ENROLLING,
diff --git a/src/ipcpd/shim-udp/CMakeLists.txt b/src/ipcpd/shim-udp/CMakeLists.txt
index 27907880..f730fa3a 100644
--- a/src/ipcpd/shim-udp/CMakeLists.txt
+++ b/src/ipcpd/shim-udp/CMakeLists.txt
@@ -10,6 +10,21 @@ include_directories(${CURRENT_BINARY_PARENT_DIR})
 include_directories(${CMAKE_SOURCE_DIR}/include)
 include_directories(${CMAKE_BINARY_DIR}/include)
 
+# Find library needed for gethostbyname.
+include(CheckFunctionExists)
+CHECK_FUNCTION_EXISTS("gethostbyname" CMAKE_HAVE_GETHOSTBYNAME)
+IF(NOT CMAKE_HAVE_GETHOSTBYNAME)
+    CHECK_LIBRARY_EXISTS("nsl" "gethostbyname" "" CMAKE_LIB_NSL_HAS_GETHOSTBYNAME)
+    IF (CMAKE_LIB_NSL_HAS_GETHOSTBYNAME)
+        SET (X11_X_EXTRA_LIBS ${X11_X_EXTRA_LIBS} -lnsl)
+    ELSE (CMAKE_LIB_NSL_HAS_GETHOSTBYNAME)
+        CHECK_LIBRARY_EXISTS("bsd" "gethostbyname" "" CMAKE_LIB_BSD_HAS_GETHOSTBYNAME)
+        IF (CMAKE_LIB_BSD_HAS_GETHOSTBYNAME)
+             SET (X11_X_EXTRA_LIBS ${X11_X_EXTRA_LIBS} -lbsd)
+        ENDIF (CMAKE_LIB_BSD_HAS_GETHOSTBYNAME)
+    ENDIF (CMAKE_LIB_NSL_HAS_GETHOSTBYNAME)
+ENDIF(NOT CMAKE_HAVE_GETHOSTBYNAME)
+
 SET(IPCP_SHIM_UDP_TARGET ipcpd-shim-udp CACHE STRING "IPCP_SHIM_UDP_TARGET")
 
 set(SHIM_UDP_SOURCES
diff --git a/src/ipcpd/shim-udp/main.c b/src/ipcpd/shim-udp/main.c
index df731490..029df111 100644
--- a/src/ipcpd/shim-udp/main.c
+++ b/src/ipcpd/shim-udp/main.c
@@ -21,7 +21,6 @@
  */
 
 #include <ouroboros/config.h>
-
 #include "ipcp.h"
 #include "flow.h"
 #include <ouroboros/shm_du_map.h>
@@ -29,6 +28,7 @@
 #include <ouroboros/utils.h>
 #include <ouroboros/ipcp.h>
 #include <ouroboros/dif_config.h>
+#include <ouroboros/sockets.h>
 
 #define OUROBOROS_PREFIX "ipcpd/shim-udp"
 
@@ -36,6 +36,7 @@
 
 #include <string.h>
 #include <sys/socket.h>
+#include <sys/select.h>
 #include <arpa/inet.h>
 #include <netdb.h>
 #include <netinet/in.h>
@@ -44,9 +45,15 @@
 #include <pthread.h>
 
 #define THIS_TYPE IPCP_SHIM_UDP
+#define LISTEN_PORT htons(0x0D1F)
+#define SHIM_UDP_BUF_SIZE 256
+#define SHIM_UDP_MAX_SDU_SIZE 8980
 
 #define shim_data(type) ((struct ipcp_udp_data *) type->data)
 
+#define local_ip (((struct ipcp_udp_data *)                              \
+                         _ipcp->data)->s_saddr.sin_addr.s_addr)
+
 /* global for trapping signal */
 int irmd_pid;
 
@@ -58,22 +65,25 @@ struct ipcp * _ipcp;
 #endif
 
 struct ipcp_udp_data {
-        /* IPCP_DATA STRUCT MUST BE FIRST!! */
+        /* keep ipcp_data first for polymorphism */
         struct ipcp_data ipcp_data;
 
         uint32_t ip_addr;
         uint32_t dns_addr;
 
+        /* listen server */
+        struct sockaddr_in s_saddr;
+        int                s_fd;
+
+        fd_set flow_fd_s;
+        flow_t * fd_to_flow_ptr[FD_SETSIZE];
+
         pthread_mutex_t   lock;
 };
 
 struct udp_flow {
-        /* FLOW MUST BE FIRST !!!! */
+        /* keep flow first for polymorphism */
         flow_t flow;
-
-        uint16_t localport;
-
-        struct sockaddr_in * remote;
         int    fd;
 };
 
@@ -85,7 +95,7 @@ void ipcp_sig_handler(int sig, siginfo_t * info, void * c)
         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);
+                        /* shm_du_map_close(_ipcp->data->dum); */
                         exit(0);
                 }
         default:
@@ -93,29 +103,14 @@ void ipcp_sig_handler(int sig, siginfo_t * info, void * c)
         }
 }
 
-struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name,
-                                            char * ap_id)
+struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name)
 {
         struct ipcp_udp_data * udp_data;
         struct ipcp_data *     data;
-        instance_name_t *      instance_name;
         enum ipcp_type         ipcp_type;
+        int                    n;
 
-        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);
+        udp_data = malloc(sizeof *udp_data);
         if (udp_data == NULL) {
                 LOG_DBGF("Failed to allocate.");
                 return NULL;
@@ -123,18 +118,175 @@ struct ipcp_udp_data * ipcp_udp_data_create(char * ap_name,
 
         ipcp_type = THIS_TYPE;
         data = (struct ipcp_data *) udp_data;
-        if (ipcp_data_init(data, instance_name, ipcp_type) == NULL) {
+        if (ipcp_data_init(data, ap_name, ipcp_type) == NULL) {
                 free(udp_data);
                 return NULL;
         }
 
+        FD_ZERO(&udp_data->flow_fd_s);
+        for (n = 0; n < FD_SETSIZE; ++n)
+                udp_data->fd_to_flow_ptr[n] = NULL;
+
         return udp_data;
 }
 
+static void * ipcp_udp_listener()
+{
+        char buf[SHIM_UDP_BUF_SIZE];
+        int     n = 0;
+
+        struct sockaddr_in f_saddr;
+        struct sockaddr_in c_saddr;
+        struct hostent  *  hostp;
+        struct udp_flow *  flow;
+        int                sfd = shim_data(_ipcp)->s_fd;
+
+        irm_msg_t          msg = IRM_MSG__INIT;
+        irm_msg_t *        ret_msg ;
+
+        while (true) {
+                n = sizeof c_saddr;
+                n = recvfrom(sfd, buf, SHIM_UDP_BUF_SIZE, 0,
+                             (struct sockaddr *) &c_saddr, (unsigned *) &n);
+                if (n < 0)
+                        continue;
+
+                /* flow alloc request from other host */
+                hostp = gethostbyaddr((const char *) &c_saddr.sin_addr.s_addr,
+                                      sizeof(c_saddr.sin_addr.s_addr), AF_INET);
+                if (hostp == NULL)
+                        continue;
+
+                /* create a new socket for the server */
+                flow = malloc(sizeof *flow);
+                if (flow == NULL)
+                        continue;
+
+                flow->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+                if (flow->fd == -1) {
+                        free(flow);
+                        continue;
+                }
+
+                memset((char *) &f_saddr, 0, sizeof f_saddr);
+                f_saddr.sin_family      = AF_INET;
+                f_saddr.sin_addr.s_addr = local_ip;
+
+                /*
+                 * FIXME: we could have a port dedicated per registered AP
+                 * Not that critical for UDP, but will be for LLC
+                 */
+
+                f_saddr.sin_port        = 0;
+
+                /*
+                 * store the remote address in the file descriptor
+                 * this avoids having to store the sockaddr_in in
+                 * the flow structure
+                 */
+
+                if (connect(flow->fd,
+                            (struct sockaddr *) &c_saddr, sizeof c_saddr) < 0) {
+                        close(flow->fd);
+                        free(flow);
+                        continue;
+                }
+
+                /* reply to IRM */
+
+                msg.code = IRM_MSG_CODE__IPCP_FLOW_REQ_ARR;
+                msg.ap_name = ANONYMOUS_AP;
+                msg.ae_name = ""; /* no AE */
+                msg.dst_name = buf;
+
+                ret_msg = send_recv_irm_msg(&msg);
+                if (ret_msg == NULL) {
+                        LOG_ERR("Could not send message to IRM.");
+                        close(flow->fd);
+                        free(flow);
+                        continue;
+                }
+
+                if (!ret_msg->has_port_id) {
+                        LOG_ERR("Didn't get port_id.");
+                        free(ret_msg);
+                        close(flow->fd);
+                        free(flow);
+                        continue;
+                }
+
+                flow->flow.port_id = ret_msg->port_id;
+                flow->flow.oflags  = FLOW_O_DEFAULT;
+                flow->flow.state   = FLOW_PENDING;
+
+                if(ipcp_data_add_flow(_ipcp->data, (flow_t *) flow)) {
+                        LOG_DBGF("Could not add flow.");
+                        free(ret_msg);
+                        close(flow->fd);
+                        free(flow);
+                        continue;
+                }
+
+                FD_SET(flow->fd, &shim_data(_ipcp)->flow_fd_s);
+                shim_data(_ipcp)->fd_to_flow_ptr[flow->fd] = &flow->flow;
+        }
+
+        return 0;
+}
+
+static void * ipcp_udp_sdu_reader()
+{
+        int n;
+        int fd;
+        char buf[SHIM_UDP_MAX_SDU_SIZE];
+
+        struct sockaddr_in r_saddr;
+
+        while (true) {
+                flow_t * flow;
+
+                if (select(FD_SETSIZE,
+                           &shim_data(_ipcp)->flow_fd_s,
+                           NULL, NULL, NULL)
+                    < 0)
+                        continue;
+
+                for (fd = 0; fd < FD_SETSIZE; ++fd) {
+                        if (!FD_ISSET(fd, &shim_data(_ipcp)->flow_fd_s))
+                                continue;
+
+                        n = sizeof r_saddr;
+                        n = recvfrom(fd,
+                                     buf,
+                                     SHIM_UDP_MAX_SDU_SIZE,
+                                     0,
+                                     (struct sockaddr *) &r_saddr,
+                                     (unsigned *) &n);
+
+                        flow = shim_data(_ipcp)->fd_to_flow_ptr[fd];
+                        if (flow->state == FLOW_PENDING) {
+                                if (connect(fd,
+                                            (struct sockaddr *) &r_saddr,
+                                            sizeof r_saddr)
+                                    < 0)
+                                       continue;
+                                flow->state = FLOW_ALLOCATED;
+                        }
+
+                        /* send the sdu to the correct port_id */
+                        LOG_MISSING;
+                }
+        }
+
+        return (void *) 0;
+}
+
 int ipcp_udp_bootstrap(struct dif_config * conf)
 {
         char ipstr[INET_ADDRSTRLEN];
         char dnsstr[INET_ADDRSTRLEN];
+        pthread_t handler;
+        pthread_t sdu_reader;
 
         if (conf->type != THIS_TYPE) {
                 LOG_ERR("Config doesn't match IPCP type.");
@@ -157,11 +309,33 @@ int ipcp_udp_bootstrap(struct dif_config * conf)
                           dnsstr,
                           INET_ADDRSTRLEN);
         else
-                strcpy(dnsstr, "not set");
+                strcpy(dnsstr, "not set.\n");
 
         shim_data(_ipcp)->ip_addr  = conf->ip_addr;
         shim_data(_ipcp)->dns_addr = conf->dns_addr;
 
+        /* UDP listen server */
+
+        if ((shim_data(_ipcp)->s_fd =
+             socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
+                LOG_DBGF("Can't create socket.");
+                return -1;
+        }
+
+        shim_data(_ipcp)->s_saddr.sin_family      = AF_INET;
+        shim_data(_ipcp)->s_saddr.sin_addr.s_addr = conf->ip_addr;
+        shim_data(_ipcp)->s_saddr.sin_port        = LISTEN_PORT;
+
+        if (bind(shim_data(_ipcp)->s_fd,
+                 (struct sockaddr *) &shim_data(_ipcp)->s_saddr,
+                 sizeof shim_data(_ipcp)->s_saddr ) < 0) {
+                LOG_ERR("Couldn't bind to %s.", ipstr);
+                return -1;
+        }
+
+        pthread_create(&handler, NULL, ipcp_udp_listener, NULL);
+        pthread_create(&sdu_reader, NULL, ipcp_udp_sdu_reader, NULL);
+
         _ipcp->state = IPCP_ENROLLED;
 
         LOG_DBG("Bootstrapped shim IPCP over UDP %s-%d.",
@@ -173,52 +347,173 @@ int ipcp_udp_bootstrap(struct dif_config * conf)
         return 0;
 }
 
-int ipcp_udp_ap_reg(char * ap_name, uint32_t reg_ap_id)
+int ipcp_udp_name_reg(char * name)
 {
-        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.");
+        if (ipcp_data_add_reg_entry(_ipcp->data, name)) {
+                LOG_ERR("Failed to add %s to local registry.", name);
                 return -1;
         }
 
+        LOG_DBG("Registered %s", name);
+
+        /* FIXME: register application with DNS server */
         LOG_MISSING;
 
         return 0;
 }
 
-int ipcp_udp_ap_unreg(uint32_t reg_ap_id)
+int ipcp_udp_name_unreg(char * name)
 {
-        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, name);
 
-        ipcp_data_del_reg_entry(_ipcp->data, reg_ap_id);
+        LOG_DBG("Unregistered %s.", name);
 
-        /* we are using dns */
+        /* FIXME: unregister application from DNS server */
         LOG_MISSING;
 
-        free (name);
-
         return 0;
 }
 
 int ipcp_udp_flow_alloc(uint32_t          port_id,
-                        char *            dst_ap_name,
+                        char *            dst_name,
                         char *            src_ap_name,
                         char *            src_ae_name,
                         struct qos_spec * qos)
 {
+        struct udp_flow *  flow = NULL;
+        struct sockaddr_in l_saddr;
+        struct sockaddr_in r_saddr;
+
+        struct hostent * h;
+
+        irm_msg_t   msg = IRM_MSG__INIT;
+        irm_msg_t * ret_msg = NULL;
+
+        if (dst_name == NULL || src_ap_name == NULL || src_ae_name == NULL)
+                return -1;
+
+        LOG_DBG("Received flow allocation request from %s to %s.",
+                src_ap_name, dst_name);
+
+        if (strlen(dst_name) > 255
+            || strlen(src_ap_name) > 255
+            || strlen(src_ae_name) > 255) {
+                LOG_ERR("Name too long for this shim.");
+                return -1;
+        }
+
+        if (qos != NULL)
+                LOG_DBGF("QoS requested. UDP/IP can't do that.");
+
+        flow = malloc(sizeof *flow);
+        if (flow == NULL)
+                return -1;
+
+        flow->fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+        if (flow->fd == -1) {
+                free(flow);
+                return -1;
+        }
+
+        /* this socket is for the flow */
+        memset((char *) &l_saddr, 0, sizeof l_saddr);
+        l_saddr.sin_family      = AF_INET;
+        l_saddr.sin_addr.s_addr = local_ip;
+        l_saddr.sin_port        = 0;
+
+        if (bind(flow->fd, (struct sockaddr *) &l_saddr, sizeof l_saddr) < 0) {
+                char ipstr[INET_ADDRSTRLEN];
+                inet_ntop(AF_INET,
+                          &l_saddr.sin_addr.s_addr,
+                          ipstr,
+                          INET_ADDRSTRLEN);
+                close(flow->fd);
+                free(flow);
+                return -1;
+        }
+
+        h = gethostbyname(dst_name);
+        if (h == NULL) {
+                close(flow->fd);
+                free(flow);
+                return -1;
+        }
+
+
+        memset((char *) &r_saddr, 0, sizeof r_saddr);
+        r_saddr.sin_family      = AF_INET;
+        r_saddr.sin_addr.s_addr = (uint32_t) *(h->h_addr_list[0]);
+        r_saddr.sin_port        = LISTEN_PORT;
+
+        /* at least try to get the packet on the wire */
+        while (sendto(flow->fd, dst_name, strlen(dst_name), 0,
+                      (struct sockaddr *) &r_saddr, sizeof r_saddr) < 0)
+
+        flow->flow.port_id = port_id;
+        flow->flow.oflags  = FLOW_O_DEFAULT;
+        flow->flow.state   = FLOW_PENDING;
+
+        /* add flow to the list */
+
+        pthread_mutex_lock(&_ipcp->data->flow_lock);
+
+        if(ipcp_data_add_flow(_ipcp->data, (flow_t *) flow)) {
+                LOG_DBGF("Could not add flow.");
+                pthread_mutex_unlock(&_ipcp->data->flow_lock);
+                close(flow->fd);
+                free(flow);
+                return -1;
+        }
+
+        pthread_mutex_unlock(&_ipcp->data->flow_lock);
+
+        /* tell IRMd that flow allocation "worked" */
+
+        msg.code = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
+        msg.has_port_id = true;
+        msg.port_id = flow->flow.port_id;
+        msg.has_response = true;
+        msg.response = 0;
+
+        ret_msg = send_recv_irm_msg(&msg);
+        if (ret_msg == NULL) {
+                close(flow->fd);
+                ipcp_data_del_flow(_ipcp->data, flow->flow.port_id);
+                return -1;
+        }
+
+        FD_SET(flow->fd, &shim_data(_ipcp)->flow_fd_s);
+        shim_data(_ipcp)->fd_to_flow_ptr[flow->fd] = &flow->flow;
+
         return 0;
 }
+
 int ipcp_udp_flow_alloc_resp(uint32_t port_id,
-                             int      result)
+                             int      response)
 {
+        struct udp_flow * flow =
+                (struct udp_flow *) ipcp_data_find_flow(_ipcp->data, port_id);
+        if (flow == NULL) {
+                return -1;
+        }
+
+        if (response) {
+                ipcp_data_del_flow(_ipcp->data, port_id);
+                return 0;
+        }
+
+        /* awaken pending flow */
+
+        if (flow->flow.state != FLOW_PENDING)
+                return -1;
+
+        flow->flow.state = FLOW_ALLOCATED;
+
         return 0;
 }
 
@@ -239,7 +534,7 @@ int ipcp_udp_du_read(uint32_t port_id,
         return 0;
 }
 
-struct ipcp * ipcp_udp_create(char * ap_name, char * i_id)
+struct ipcp * ipcp_udp_create(char * ap_name)
 {
         struct ipcp * i;
         struct ipcp_udp_data * data;
@@ -249,13 +544,13 @@ struct ipcp * ipcp_udp_create(char * ap_name, char * i_id)
         if (i == NULL)
                 return NULL;
 
-        data = ipcp_udp_data_create(ap_name, i_id);
+        data = ipcp_udp_data_create(ap_name);
         if (data == NULL) {
                 free(i);
                 return NULL;
         }
 
-        ops = malloc (sizeof *ops);
+        ops = malloc(sizeof *ops);
         if (ops == NULL) {
                 free(data);
                 free(i);
@@ -266,8 +561,8 @@ struct ipcp * ipcp_udp_create(char * ap_name, char * i_id)
         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_name_reg        = ipcp_udp_name_reg;
+        ops->ipcp_name_unreg      = ipcp_udp_name_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;
@@ -288,7 +583,6 @@ 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)) {
@@ -300,7 +594,7 @@ int main (int argc, char * argv[])
         irmd_pid = atoi(argv[1]);
 
         /* init sig_act */
-        memset (&sig_act, 0, sizeof sig_act);
+        memset(&sig_act, 0, sizeof sig_act);
 
         /* install signal traps */
         sig_act.sa_sigaction = &ipcp_sig_handler;
@@ -310,7 +604,7 @@ int main (int argc, char * argv[])
         sigaction(SIGTERM, &sig_act, NULL);
         sigaction(SIGHUP,  &sig_act, NULL);
 
-        _ipcp = ipcp_udp_create(argv[2], argv[3]);
+        _ipcp = ipcp_udp_create(argv[2]);
         if (_ipcp == NULL) {
                 LOG_ERR("Won't.");
                 exit(1);
diff --git a/src/ipcpd/shim-udp/tests/shim_udp_test.c b/src/ipcpd/shim-udp/tests/shim_udp_test.c
index 427d0e1e..d2b9c642 100644
--- a/src/ipcpd/shim-udp/tests/shim_udp_test.c
+++ b/src/ipcpd/shim-udp/tests/shim_udp_test.c
@@ -39,14 +39,13 @@ int shim_udp_test(int argc, char ** argv)
         /* 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);
+        memset(&bogus, 0, 15);
 
         struct dif_config conf;
-        memset (&conf, 0, sizeof conf);
+        memset(&conf, 0, sizeof conf);
         conf.dif_name = strdup("test-dif");
         conf.type = IPCP_SHIM_UDP;
         conf.ip_addr = 0;
@@ -57,32 +56,32 @@ int shim_udp_test(int argc, char ** argv)
                 exit(1);
         }
 
-        _ipcp = ipcp_udp_create(ipcp_name, i_id);
+        _ipcp = ipcp_udp_create(ipcp_name);
         if (_ipcp == NULL) {
                 LOG_ERR("Could not instantiate shim IPCP.");
                 shm_du_map_close(dum);
                 exit(1);
         }
 
-        if (ipcp_udp_bootstrap (&conf)) {
+        if (ipcp_udp_bootstrap(&conf)) {
                 LOG_ERR("Could not bootstrap.");
         }
 
-        if(ipcp_udp_ap_reg("bogus ap", 1865)) {
+        if (ipcp_udp_name_reg("bogus name")) {
                 LOG_ERR("Failed to register application.");
                 shm_du_map_close(dum);
                 exit(1);
         }
 
-        if (ipcp_udp_ap_unreg(1865)) {
+        if (ipcp_udp_name_unreg("bogus name")) {
                 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)) {
+                sprintf(bogus, "bogus name %4d", i);
+                if (ipcp_udp_name_reg(bogus)) {
                          LOG_ERR("Failed to register application %s.", bogus);
                          shm_du_map_close(dum);
                          exit(1);
@@ -90,8 +89,9 @@ int shim_udp_test(int argc, char ** argv)
         }
 
         for (i = 0; i  < 1000; ++i) {
-                if(ipcp_udp_ap_unreg(i)) {
-                         LOG_ERR("Failed to unregister application %d.", i);
+                sprintf(bogus, "bogus name %4d", i);
+                if(ipcp_udp_name_unreg(bogus)) {
+                         LOG_ERR("Failed to unregister application %s.", bogus);
                          shm_du_map_close(dum);
                          exit(1);
                 }
diff --git a/src/irmd/main.c b/src/irmd/main.c
index 13076cd1..31dabebb 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -41,23 +41,42 @@
 #include <stdlib.h>
 #include <errno.h>
 #include <string.h>
+#include <limits.h>
+
+/* FIXME: this smells like part of namespace management */
+#define ALL_DIFS "*"
 
 struct ipcp_entry {
         struct list_head  next;
-        pid_t             pid;
         instance_name_t * api;
         char *            dif_name;
 };
 
+/* currently supports only registering whatevercast groups of a single AP */
+struct reg_name_entry {
+        struct list_head next;
+
+        /* generic whatevercast name */
+        char *             name;
+
+        /* FIXME: resolve name instead */
+        instance_name_t  * api;
+        uint32_t           reg_ap_id;
+};
+
 struct irm {
+        /* FIXME: list of ipcps can be merged with registered names */
         struct list_head ipcps;
+        struct list_head reg_names;
+
+        struct shm_du_map * dum;
 };
 
 struct irm * instance = NULL;
-struct shm_du_map * dum;
 
-static pid_t find_pid_by_ipcp_name(instance_name_t * api)
+static struct ipcp_entry * find_ipcp_entry_by_name(instance_name_t * api)
 {
+        struct ipcp_entry * tmp = NULL;
         struct list_head * pos = NULL;
 
         list_for_each(pos, &instance->ipcps) {
@@ -65,35 +84,147 @@ static pid_t find_pid_by_ipcp_name(instance_name_t * api)
                         list_entry(pos, struct ipcp_entry, next);
 
                 if (instance_name_cmp(api, tmp->api) == 0)
-                        return tmp->pid;
+                        return tmp;
         }
 
-        return 0;
+        return tmp;
 }
 
-static struct ipcp_entry * find_ipcp_by_name(instance_name_t * api)
+static instance_name_t * get_ipcp_by_name(char * ap_name)
 {
-        struct ipcp_entry * tmp = NULL;
         struct list_head * pos = NULL;
 
         list_for_each(pos, &instance->ipcps) {
-                struct ipcp_entry * tmp =
+                struct ipcp_entry * e =
                         list_entry(pos, struct ipcp_entry, next);
 
-                if (instance_name_cmp(api, tmp->api) == 0)
-                        return tmp;
+                if (strcmp(e->api->name, ap_name) == 0)
+                        return e->api;
         }
 
-        return tmp;
+        return NULL;
+}
+
+static instance_name_t * get_ipcp_by_dif_name(char * dif_name)
+{
+        struct list_head * pos = NULL;
+
+        list_for_each(pos, &instance->ipcps) {
+                struct ipcp_entry * e =
+                        list_entry(pos, struct ipcp_entry, next);
+
+                if (e->dif_name == NULL)
+                        continue;
+
+                if (strcmp(dif_name, e->dif_name) == 0)
+                        return e->api;
+        }
+
+        return NULL;
+}
+
+static struct reg_name_entry * reg_name_entry_create()
+{
+        struct reg_name_entry * e = malloc(sizeof(*e));
+        if (e == NULL)
+                return NULL;
+
+        e->reg_ap_id = rand() % INT_MAX;
+        e->name  = NULL;
+
+        INIT_LIST_HEAD(&e->next);
+
+        return e;
+}
+
+static struct reg_name_entry * reg_name_entry_init(struct reg_name_entry * e,
+                                                   char *                  name,
+                                                   instance_name_t       * api)
+{
+        if (e == NULL || name == NULL || api == NULL)
+                return NULL;
+
+        e->name = name;
+        e->api  = api;
+
+        return e;
+}
+
+static int reg_name_entry_destroy(struct reg_name_entry * e)
+{
+        if (e == NULL)
+                return 0;
+
+        free(e->name);
+        instance_name_destroy(e->api);
+        return 0;
+}
+
+static struct reg_name_entry * find_reg_name_entry_by_name(char * name)
+{
+        struct list_head * pos = NULL;
+
+        list_for_each(pos, &instance->reg_names) {
+                struct reg_name_entry * e =
+                        list_entry(pos, struct reg_name_entry, next);
+
+                if (strcmp(name, e->name) == 0)
+                        return e;
+        }
+
+        return NULL;
+}
+
+static struct reg_name_entry * find_reg_name_entry_by_id(uint32_t reg_ap_id)
+{
+        struct list_head * pos = NULL;
+
+        list_for_each(pos, &instance->reg_names) {
+                struct reg_name_entry * e =
+                        list_entry(pos, struct reg_name_entry, next);
+
+                if (reg_ap_id == e->reg_ap_id)
+                        return e;
+        }
+
+        return NULL;
+}
+
+/* FIXME: add only name when we have NSM solved */
+static int reg_name_entry_add_name_instance(char * name, instance_name_t * api)
+{
+        struct reg_name_entry * e = find_reg_name_entry_by_name(name);
+        if (e == NULL) {
+                e = reg_name_entry_create();
+                e = reg_name_entry_init(e, name, api);
+                list_add(&e->next, &instance->reg_names);
+                return 0;
+        }
+
+        /* already exists, we don't have NSM yet */
+        return -1;
+}
+
+static int reg_name_entry_del_name(char * name)
+{
+        struct reg_name_entry * e = find_reg_name_entry_by_name(name);
+        if (e == NULL)
+                return 0;
+
+        list_del(&e->next);
+
+        reg_name_entry_destroy(e);
+
+        return 0;
 }
 
-static int create_ipcp(instance_name_t * api,
-                       enum ipcp_type    ipcp_type)
+static pid_t create_ipcp(char *         ap_name,
+                         enum ipcp_type ipcp_type)
 {
         pid_t pid;
         struct ipcp_entry * tmp = NULL;
 
-        pid = ipcp_create(api, ipcp_type);
+        pid = ipcp_create(ap_name, ipcp_type);
         if (pid == -1) {
                 LOG_ERR("Failed to create IPCP");
                 return -1;
@@ -106,36 +237,42 @@ static int create_ipcp(instance_name_t * api,
 
         INIT_LIST_HEAD(&tmp->next);
 
-        tmp->pid = pid;
-        tmp->api = instance_name_dup(api);
+        tmp->api = instance_name_create();
         if (tmp->api == NULL) {
                 free(tmp);
                 return -1;
         }
 
+        if(instance_name_init_from(tmp->api, ap_name, pid) == NULL) {
+                instance_name_destroy(tmp->api);
+                free(tmp);
+                return -1;
+        }
+
         tmp->dif_name = NULL;
 
         LOG_DBG("Created IPC process with pid %d", pid);
 
         list_add(&tmp->next, &instance->ipcps);
-        return 0;
+        return pid;
 }
 
 static int destroy_ipcp(instance_name_t * api)
 {
-        pid_t pid = 0;
         struct list_head * pos = NULL;
         struct list_head * n = NULL;
 
-        pid = find_pid_by_ipcp_name(api);
-        if (pid == 0) {
-                LOG_ERR("No such IPCP");
+        if (api->id == 0)
+                api = get_ipcp_by_name(api->name);
+
+        if (api == NULL) {
+                LOG_ERR("No such IPCP in the system.");
                 return -1;
         }
 
-        LOG_DBG("Destroying ipcp with pid %d", pid);
+        LOG_DBG("Destroying ipcp %s-%d", api->name, api->id);
 
-        if (ipcp_destroy(pid))
+        if (ipcp_destroy(api->id))
                 LOG_ERR("Could not destroy IPCP");
 
         list_for_each_safe(pos, n, &(instance->ipcps)) {
@@ -154,7 +291,15 @@ static int bootstrap_ipcp(instance_name_t *  api,
 {
         struct ipcp_entry * entry = NULL;
 
-        entry = find_ipcp_by_name(api);
+        if (api->id == 0)
+                api = get_ipcp_by_name(api->name);
+
+        if (api == NULL) {
+                LOG_ERR("No such IPCP in the system.");
+                return -1;
+        }
+
+        entry = find_ipcp_entry_by_name(api);
         if (entry == NULL) {
                 LOG_ERR("No such IPCP");
                 return -1;
@@ -166,7 +311,7 @@ static int bootstrap_ipcp(instance_name_t *  api,
                 return -1;
         }
 
-        if (ipcp_bootstrap(entry->pid, conf)) {
+        if (ipcp_bootstrap(entry->api->id, conf)) {
                 LOG_ERR("Could not bootstrap IPCP");
                 free(entry->dif_name);
                 entry->dif_name = NULL;
@@ -184,7 +329,7 @@ static int enroll_ipcp(instance_name_t  * api,
         ssize_t n_1_difs_size = 0;
         struct ipcp_entry * entry = NULL;
 
-        entry = find_ipcp_by_name(api);
+        entry = find_ipcp_entry_by_name(api);
         if (entry == NULL) {
                 LOG_ERR("No such IPCP");
                 return -1;
@@ -212,7 +357,7 @@ static int enroll_ipcp(instance_name_t  * api,
                 return -1;
         }
 
-        if (ipcp_enroll(entry->pid, member, n_1_difs[0])) {
+        if (ipcp_enroll(entry->api->id, member, n_1_difs[0])) {
                 LOG_ERR("Could not enroll IPCP");
                 free(entry->dif_name);
                 entry->dif_name = NULL;
@@ -226,15 +371,7 @@ static int reg_ipcp(instance_name_t * api,
                     char **           difs,
                     size_t            difs_size)
 {
-        pid_t pid = 0;
-
-        pid = find_pid_by_ipcp_name(api);
-        if (pid == 0) {
-                LOG_ERR("No such IPCP");
-                return -1;
-        }
-
-        if (ipcp_reg(pid, difs, difs_size)) {
+        if (ipcp_reg(api->id, difs, difs_size)) {
                 LOG_ERR("Could not register IPCP to N-1 DIF(s)");
                 return -1;
         }
@@ -246,15 +383,8 @@ static int unreg_ipcp(instance_name_t  * api,
                       char **            difs,
                       size_t             difs_size)
 {
-        pid_t pid = 0;
-
-        pid = find_pid_by_ipcp_name(api);
-        if (pid == 0) {
-                LOG_ERR("No such IPCP");
-                return -1;
-        }
 
-        if (ipcp_unreg(pid, difs, difs_size)) {
+        if (ipcp_unreg(api->id, difs, difs_size)) {
                 LOG_ERR("Could not unregister IPCP from N-1 DIF(s)");
                 return -1;
         }
@@ -262,20 +392,162 @@ static int unreg_ipcp(instance_name_t  * api,
         return 0;
 }
 
-static int ap_reg(char * ap_name,
+static int ap_unreg_id(uint32_t reg_ap_id,
+                       pid_t    pid,
+                       char **  difs,
+                       size_t   len)
+{
+        int i;
+        int ret = 0;
+        struct reg_name_entry * rne    = NULL;
+        struct list_head      * pos  = NULL;
+
+        rne = find_reg_name_entry_by_id(reg_ap_id);
+        if (rne == NULL)
+                return 0; /* no such id */
+
+        if (instance->ipcps.next == NULL) {
+                LOG_ERR("No IPCPs in this system.");
+                return 0;
+        }
+
+        if (strcmp(difs[0], ALL_DIFS) == 0) {
+                  list_for_each(pos, &instance->ipcps) {
+                        struct ipcp_entry * e =
+                                list_entry(pos, struct ipcp_entry, next);
+
+                        if (ipcp_name_unreg(e->api->id, rne->name)) {
+                                LOG_ERR("Could not unregister %s in DIF %s.",
+                                        rne->name, e->dif_name);
+                                --ret;
+                        }
+                }
+        } else {
+                for (i = 0; i < len; ++i) {
+                        if (ipcp_name_unreg(pid, rne->name)) {
+                                LOG_ERR("Could not unregister %s in DIF %s.",
+                                        rne->name, difs[i]);
+                                --ret;
+                        }
+                }
+        }
+
+        reg_name_entry_del_name(rne->name);
+
+        return ret;
+}
+
+static int ap_reg(char *  ap_name,
+                  pid_t   ap_id,
                   char ** difs,
-                  size_t difs_size)
+                  size_t  len)
 {
-        return -1;
+        int i;
+        int ret = 0;
+        int reg_ap_id = 0;
+        struct list_head * pos = NULL;
+        struct reg_name_entry * rne = NULL;
+
+        instance_name_t * api   = NULL;
+        instance_name_t * ipcpi = NULL;
+
+        if (instance->ipcps.next == NULL)
+                LOG_ERR("No IPCPs in this system.");
+
+        /* check if this ap_name is already registered */
+        rne = find_reg_name_entry_by_name(ap_name);
+        if (rne != NULL)
+                return -1; /* can only register one instance for now */
+
+        rne = reg_name_entry_create();
+        if (rne == NULL)
+                return -1;
+
+        api = instance_name_create();
+        if (instance_name_init_from(api, ap_name, ap_id) == NULL) {
+                instance_name_destroy(api);
+                return -1;
+        }
+
+        /*
+         * for now, the whatevercast name is the same as the ap_name and
+         * contains a single instance only
+         */
+
+        if (reg_name_entry_init(rne, strdup(ap_name), api) == NULL) {
+                reg_name_entry_destroy(rne);
+                instance_name_destroy(api);
+                return -1;
+        }
+
+        if (strcmp(difs[0], ALL_DIFS) == 0) {
+                list_for_each(pos, &instance->ipcps) {
+                        struct ipcp_entry * e =
+                                list_entry(pos, struct ipcp_entry, next);
+
+                        if (ipcp_name_reg(e->api->id, ap_name)) {
+                                LOG_ERR("Could not register %s in DIF %s.",
+                                        api->name, e->dif_name);
+                        } else {
+                                ++ret;
+                        }
+                }
+        } else {
+                for (i = 0; i < len; ++i) {
+                        ipcpi = get_ipcp_by_dif_name(difs[i]);
+                        if (ipcpi == NULL) {
+                                LOG_ERR("%s: No such DIF.", difs[i]);
+                                continue;
+                        }
+
+                        if (ipcp_name_reg(ipcpi->id, api->name)) {
+                                LOG_ERR("Could not register %s in DIF %s.",
+                                        api->name, difs[i]);
+                        } else {
+                                ++ret;
+                        }
+                }
+        }
+
+        if (ret ==  0) {
+                instance_name_destroy(api);
+                return -1;
+        }
+        /* for now, we register single instances */
+        reg_name_entry_add_name_instance(strdup(ap_name),
+                                         instance_name_dup(api));
+        instance_name_destroy(api);
+
+        return reg_ap_id;
 }
 
-static int ap_unreg(char * ap_name,
+static int ap_unreg(char *  ap_name,
+                    pid_t   ap_id,
                     char ** difs,
-                    size_t difs_size)
+                    size_t  len)
 {
-        return -1;
+        struct reg_name_entry * tmp = NULL;
+
+        instance_name_t * api = instance_name_create();
+        if (api == NULL)
+                return -1;
+
+        if (instance_name_init_from(api, ap_name, ap_id) == NULL) {
+                instance_name_destroy(api);
+                return -1;
+        }
+
+        /* check if ap_name is registered */
+        tmp = find_reg_name_entry_by_name(api->name);
+        if (tmp == NULL) {
+                instance_name_destroy(api);
+                return 0;
+        } else {
+                return ap_unreg_id(tmp->reg_ap_id, api->id, difs, len);
+        }
 }
 
+
 static int flow_accept(int fd,
                        char * ap_name,
                        char * ae_name)
@@ -340,7 +612,7 @@ void irmd_sig_handler(int sig, siginfo_t * info, void * c)
         case SIGINT:
         case SIGTERM:
         case SIGHUP:
-                shm_du_map_close(dum);
+                shm_du_map_close(instance->dum);
                 free(instance);
                 exit(0);
         default:
@@ -356,7 +628,7 @@ int main()
         struct sigaction sig_act;
 
         /* init sig_act */
-        memset (&sig_act, 0, sizeof sig_act);
+        memset(&sig_act, 0, sizeof sig_act);
 
         /* install signal traps */
         sig_act.sa_sigaction = &irmd_sig_handler;
@@ -366,21 +638,24 @@ int main()
         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;
 
+        if ((instance->dum = shm_du_map_create()) == NULL) {
+                free(instance);
+                return -1;
+        }
+
         INIT_LIST_HEAD(&instance->ipcps);
+        INIT_LIST_HEAD(&instance->reg_names);
 
         sockfd = server_socket_open(IRM_SOCK_PATH);
         if (sockfd < 0) {
+                shm_du_map_close(instance->dum);
                 free(instance);
                 return -1;
         }
@@ -415,12 +690,13 @@ int main()
                 }
 
                 api.name = msg->ap_name;
-                api.id   = msg->api_id;
+                if (msg->has_api_id == true)
+                        api.id = msg->api_id;
 
                 switch (msg->code) {
                 case IRM_MSG_CODE__IRM_CREATE_IPCP:
                         ret_msg.has_result = true;
-                        ret_msg.result = create_ipcp(&api,
+                        ret_msg.result = create_ipcp(msg->ap_name,
                                                      msg->ipcp_type);
                         break;
                 case IRM_MSG_CODE__IRM_DESTROY_IPCP:
@@ -451,12 +727,14 @@ int main()
                 case IRM_MSG_CODE__IRM_AP_REG:
                         ret_msg.has_fd = true;
                         ret_msg.fd = ap_reg(msg->ap_name,
+                                            msg->pid,
                                             msg->dif_name,
                                             msg->n_dif_name);
                         break;
                 case IRM_MSG_CODE__IRM_AP_UNREG:
                         ret_msg.has_result = true;
                         ret_msg.result = ap_unreg(msg->ap_name,
+                                                  msg->pid,
                                                   msg->dif_name,
                                                   msg->n_dif_name);
                         break;
@@ -473,15 +751,15 @@ int main()
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_ALLOC:
                         ret_msg.has_fd = true;
-                        ret_msg.fd = flow_alloc(msg->dst_ap_name,
+                        ret_msg.fd = flow_alloc(msg->dst_name,
                                                 msg->ap_name,
                                                 msg->ae_name,
                                                 NULL,
                                                 msg->oflags);
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_ALLOC_RES:
-                        ret_msg.has_result = true;
-                        ret_msg.result = flow_alloc_res(msg->fd);
+                        ret_msg.has_response = true;
+                        ret_msg.response = flow_alloc_res(msg->fd);
                         break;
                 case IRM_MSG_CODE__IRM_FLOW_DEALLOC:
                         ret_msg.has_result = true;
@@ -493,15 +771,15 @@ int main()
                                                    msg->oflags);
                         break;
                 case IRM_MSG_CODE__IPCP_FLOW_REQ_ARR:
-                        ret_msg.has_fd = true;
-                        ret_msg.fd = flow_req_arr(msg->port_id,
-                                                  msg->ap_name,
-                                                  msg->ae_name);
+                        ret_msg.has_port_id = true;
+                        ret_msg.port_id = flow_req_arr(msg->port_id,
+                                                       msg->ap_name,
+                                                       msg->ae_name);
                         break;
                 case IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY:
                         ret_msg.has_result = true;
                         ret_msg.result = flow_alloc_reply(msg->port_id,
-                                                          msg->result);
+                                                          msg->response);
                         break;
                 case IRM_MSG_CODE__IPCP_FLOW_DEALLOC:
                         ret_msg.has_result = true;
diff --git a/src/lib/dev.c b/src/lib/dev.c
index c138b009..60dee701 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -43,9 +43,11 @@ int ap_reg(char * ap_name,
                 return -EINVAL;
         }
 
-        msg.code = IRM_MSG_CODE__IRM_AP_REG;
-        msg.ap_name = ap_name;
-        msg.dif_name = difs;
+        msg.code       = IRM_MSG_CODE__IRM_AP_REG;
+        msg.has_pid    = true;
+        msg.pid        = getpid();
+        msg.ap_name    = ap_name;
+        msg.dif_name   = difs;
         msg.n_dif_name = difs_size;
 
         recv_msg = send_recv_irm_msg(&msg);
@@ -78,9 +80,11 @@ int ap_unreg(char * ap_name,
                 return -EINVAL;
         }
 
-        msg.code = IRM_MSG_CODE__IRM_AP_UNREG;
-        msg.ap_name = ap_name;
-        msg.dif_name = difs;
+        msg.code       = IRM_MSG_CODE__IRM_AP_UNREG;
+        msg.has_pid    = true;
+        msg.pid        = getpid();
+        msg.ap_name    = ap_name;
+        msg.dif_name   = difs;
         msg.n_dif_name = difs_size;
 
         recv_msg = send_recv_irm_msg(&msg);
@@ -110,9 +114,11 @@ int flow_accept(int fd,
                 return -EINVAL;
         }
 
-        msg.code = IRM_MSG_CODE__IRM_FLOW_ACCEPT;
-        msg.has_fd = true;
-        msg.fd = fd;
+        msg.code    = IRM_MSG_CODE__IRM_FLOW_ACCEPT;
+        msg.has_pid = true;
+        msg.pid     = getpid();
+        msg.has_fd  = true;
+        msg.fd      = fd;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -122,7 +128,7 @@ int flow_accept(int fd,
                 irm_msg__free_unpacked(recv_msg, NULL);
                 return -1;
         }
-        cli_fd = recv_msg->fd;
+        cli_fd  = recv_msg->fd;
         ap_name = recv_msg->ap_name;
         ae_name = recv_msg->ae_name;
 
@@ -131,17 +137,19 @@ int flow_accept(int fd,
 }
 
 int flow_alloc_resp(int fd,
-                    int result)
+                    int response)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.code = IRM_MSG_CODE__IRM_FLOW_ALLOC_RESP;
-        msg.has_fd = true;
+        msg.code         = IRM_MSG_CODE__IRM_FLOW_ALLOC_RESP;
+        msg.has_pid      = true;
+        msg.pid          = getpid();
+        msg.has_fd       = true;
         msg.fd = fd;
-        msg.has_result = true;
-        msg.result = result;
+        msg.has_response = true;
+        msg.response     = response;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -158,7 +166,7 @@ int flow_alloc_resp(int fd,
         return ret;
 }
 
-int flow_alloc(char * dst_ap_name,
+int flow_alloc(char * dst_name,
                char * src_ap_name,
                char * src_ae_name,
                struct qos_spec * qos,
@@ -168,18 +176,18 @@ int flow_alloc(char * dst_ap_name,
         irm_msg_t * recv_msg = NULL;
         int fd = 0;
 
-        if (dst_ap_name == NULL ||
+        if (dst_name == NULL ||
             src_ap_name == NULL ||
             qos == NULL) {
                 return -EINVAL;
         }
 
-        msg.code = IRM_MSG_CODE__IRM_FLOW_ALLOC;
-        msg.dst_ap_name = dst_ap_name;
-        msg.ap_name = src_ap_name;
-        msg.ae_name = src_ae_name;
-        msg.has_oflags = true;
-        msg.oflags = oflags;
+        msg.code        = IRM_MSG_CODE__IRM_FLOW_ALLOC;
+        msg.dst_name    = dst_name;
+        msg.ap_name     = src_ap_name;
+        msg.ae_name     = src_ae_name;
+        msg.has_oflags  = true;
+        msg.oflags      = oflags;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -201,9 +209,11 @@ int flow_alloc_res(int fd)
         irm_msg_t * recv_msg = NULL;
         int result = 0;
 
-        msg.code = IRM_MSG_CODE__IRM_FLOW_ALLOC_RES;
-        msg.has_fd = true;
-        msg.fd = fd;
+        msg.code    = IRM_MSG_CODE__IRM_FLOW_ALLOC_RES;
+        msg.has_pid = true;
+        msg.pid     = getpid();
+        msg.has_fd  = true;
+        msg.fd      = fd;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -226,9 +236,11 @@ int flow_dealloc(int fd)
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.code = IRM_MSG_CODE__IRM_FLOW_DEALLOC;
-        msg.has_fd = true;
-        msg.fd = fd;
+        msg.code    = IRM_MSG_CODE__IRM_FLOW_DEALLOC;
+        msg.has_pid = true;
+        msg.pid     = getpid();
+        msg.has_fd  = true;
+        msg.fd      = fd;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -251,9 +263,11 @@ int flow_cntl(int fd, int oflags)
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        msg.has_fd = true;
-        msg.fd = fd;
-        msg.oflags = oflags;
+        msg.has_pid = true;
+        msg.pid     = getpid();
+        msg.has_fd  = true;
+        msg.fd      = fd;
+        msg.oflags  = oflags;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
diff --git a/src/lib/ipcp.c b/src/lib/ipcp.c
index 338d8683..387572b3 100644
--- a/src/lib/ipcp.c
+++ b/src/lib/ipcp.c
@@ -99,12 +99,11 @@ static ipcp_msg_t * send_recv_ipcp_msg(pid_t pid,
        return recv_msg;
 }
 
-pid_t ipcp_create(instance_name_t * api,
-                  enum ipcp_type    ipcp_type)
+pid_t ipcp_create(char *         ipcp_name,
+                  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";
         char * full_name = NULL;
@@ -122,21 +121,12 @@ pid_t ipcp_create(instance_name_t * api,
                 return pid;
         }
 
-        api_id = malloc(n_digits(api->id) + 1);
-        if (!api_id) {
-                LOG_ERR("Failed to malloc");
-                exit(EXIT_FAILURE);
-        }
-        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);
+        else
                 exit(EXIT_FAILURE);
-        }
 
         len += strlen(INSTALL_DIR);
         len += strlen(ipcp_dir);
@@ -146,7 +136,6 @@ pid_t ipcp_create(instance_name_t * api,
         full_name = malloc(len + 1);
         if (full_name == NULL) {
                 LOG_ERR("Failed to malloc");
-                free(api_id);
                 exit(EXIT_FAILURE);
         }
 
@@ -161,8 +150,7 @@ pid_t ipcp_create(instance_name_t * api,
 
         char * argv[] = {full_name,
                          irmd_pid,
-                         api->name,
-                         api_id,
+                         ipcp_name,
                          0};
 
         char * envp[] = {0};
@@ -172,7 +160,6 @@ pid_t ipcp_create(instance_name_t * api,
         LOG_DBG("%s", strerror(errno));
         LOG_ERR("Failed to load IPCP daemon");
         LOG_ERR("Make sure to run the installed version");
-        free(api_id);
         free(full_name);
         exit(EXIT_FAILURE);
 }
@@ -326,21 +313,18 @@ int ipcp_enroll(pid_t pid,
         return ret;
 }
 
-int ipcp_ap_reg(pid_t    pid,
-                uint32_t reg_ap_id,
-                char *   ap_name)
+int ipcp_name_reg(pid_t    pid,
+                  char *   name)
 {
         ipcp_msg_t msg = IPCP_MSG__INIT;
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (ap_name == NULL)
+        if (name == NULL)
                 return -1;
 
-        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;
+        msg.code          = IPCP_MSG_CODE__IPCP_NAME_REG;
+        msg.name          = name;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -357,16 +341,15 @@ int ipcp_ap_reg(pid_t    pid,
         return ret;
 }
 
-int ipcp_ap_unreg(pid_t    pid,
-                  uint32_t reg_ap_id)
+int ipcp_name_unreg(pid_t  pid,
+                    char * name)
 {
         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_reg_ap_id = true;
-        msg.reg_ap_id     = reg_ap_id;
+        msg.code = IPCP_MSG_CODE__IPCP_NAME_UNREG;
+        msg.name = name;
 
         recv_msg = send_recv_ipcp_msg(pid, &msg);
         if (recv_msg == NULL)
@@ -385,7 +368,7 @@ int ipcp_ap_unreg(pid_t    pid,
 
 int ipcp_flow_alloc(pid_t             pid,
                     uint32_t          port_id,
-                    char *            dst_ap_name,
+                    char *            dst_name,
                     char *            src_ap_name,
                     char *            src_ae_name,
                     struct qos_spec * qos)
@@ -394,13 +377,13 @@ int ipcp_flow_alloc(pid_t             pid,
         ipcp_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (dst_ap_name == NULL || src_ap_name == NULL || src_ae_name == NULL)
+        if (dst_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.dst_ap_name = dst_ap_name;
+        msg.src_ap_name = src_ap_name;
+        msg.src_ae_name = src_ae_name;
+        msg.dst_name    = dst_name;
         msg.port_id     = port_id;
         msg.has_port_id = true;
 
@@ -449,22 +432,21 @@ int ipcp_flow_alloc_resp(pid_t    pid,
 }
 
 int ipcp_flow_req_arr(pid_t    pid,
-                      uint32_t reg_ap_id,
-                      char *   ap_name,
-                      char *   ae_name)
+                      char *   dst_name,
+                      char *   src_ap_name,
+                      char *   src_ae_name)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int fd = -1;
 
-        if (ap_name == NULL || ae_name == NULL)
+        if (src_ap_name == NULL || src_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.reg_ap_id     = reg_ap_id;
-        msg.has_reg_ap_id = true;
+        msg.dst_name      = dst_name;
+        msg.ap_name       = src_ap_name;
+        msg.ae_name       = src_ae_name;
         msg.pid           = pid;
         msg.has_pid       = true;
 
@@ -485,17 +467,17 @@ int ipcp_flow_req_arr(pid_t    pid,
 
 int ipcp_flow_alloc_reply(pid_t    pid,
                           uint32_t port_id,
-                          int      result)
+                          int      response)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        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.code         = IRM_MSG_CODE__IPCP_FLOW_ALLOC_REPLY;
+        msg.port_id      = port_id;
+        msg.has_port_id  = true;
+        msg.response     = response;
+        msg.has_response = true;
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
@@ -521,9 +503,9 @@ int ipcp_flow_dealloc(pid_t    pid,
                 ipcp_msg_t * recv_msg = NULL;
                 int ret = -1;
 
-                msg.code = IPCP_MSG_CODE__IPCP_FLOW_DEALLOC;
+                msg.code        = IPCP_MSG_CODE__IPCP_FLOW_DEALLOC;
                 msg.has_port_id = true;
-                msg.port_id = port_id;
+                msg.port_id     = port_id;
 
                 recv_msg = send_recv_ipcp_msg(pid, &msg);
                 if (recv_msg == NULL)
@@ -543,9 +525,9 @@ int ipcp_flow_dealloc(pid_t    pid,
                 irm_msg_t * recv_msg = NULL;
                 int ret = -1;
 
-                msg.code = IRM_MSG_CODE__IPCP_FLOW_DEALLOC;
+                msg.code        = IRM_MSG_CODE__IPCP_FLOW_DEALLOC;
                 msg.has_port_id = true;
-                msg.port_id = port_id;
+                msg.port_id     = port_id;
 
                 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 796638c7..da4bb469 100644
--- a/src/lib/ipcpd_messages.proto
+++ b/src/lib/ipcpd_messages.proto
@@ -1,16 +1,16 @@
 import "dif_config.proto";
 
 enum ipcp_msg_code {
-        IPCP_BOOTSTRAP = 1;
-        IPCP_ENROLL = 2;
-        IPCP_REG = 3;
-        IPCP_UNREG = 4;
-        IPCP_AP_REG = 5;
-        IPCP_AP_UNREG = 6;
-        IPCP_FLOW_ALLOC = 7;
-        IPCP_FLOW_ALLOC_RESP = 8;
-        IPCP_FLOW_DEALLOC = 9;
-        IPCP_REPLY = 10;
+        IPCP_BOOTSTRAP       =  1;
+        IPCP_ENROLL          =  2;
+        IPCP_REG             =  3;
+        IPCP_UNREG           =  4;
+        IPCP_NAME_REG        =  5;
+        IPCP_NAME_UNREG      =  6;
+        IPCP_FLOW_ALLOC      =  7;
+        IPCP_FLOW_ALLOC_RESP =  8;
+        IPCP_FLOW_DEALLOC    =  9;
+        IPCP_REPLY           = 10;
 };
 
 message ipcp_msg {
@@ -19,11 +19,12 @@ message ipcp_msg {
         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 string name         =  6;
+        optional int32 port_id       =  7;
+        optional string dst_name     =  8;
+        optional string src_ap_name  =  9;
+        optional string src_ae_name  = 10;
         optional dif_config_msg conf = 11;
         optional int32 result        = 12;
+        optional int32 fd            = 13;
 };
diff --git a/src/lib/irm.c b/src/lib/irm.c
index b17cb04c..cc1c0d01 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -30,20 +30,18 @@
 
 #include <stdlib.h>
 
-int irm_create_ipcp(instance_name_t * api,
-                    enum ipcp_type    ipcp_type)
+pid_t irm_create_ipcp(char *         ipcp_name,
+                      enum ipcp_type ipcp_type)
 {
         irm_msg_t msg = IRM_MSG__INIT;
         irm_msg_t * recv_msg = NULL;
         int ret = -1;
 
-        if (api == NULL || api->name == NULL)
+        if (ipcp_name == NULL)
                 return -EINVAL;
 
         msg.code = IRM_MSG_CODE__IRM_CREATE_IPCP;
-        msg.ap_name = api->name;
-        msg.has_api_id = true;
-        msg.api_id = api->id;
+        msg.ap_name = ipcp_name;
         msg.has_ipcp_type = true;
         msg.ipcp_type = ipcp_type;
 
diff --git a/src/lib/irmd_messages.proto b/src/lib/irmd_messages.proto
index 92ea439e..89e2c882 100644
--- a/src/lib/irmd_messages.proto
+++ b/src/lib/irmd_messages.proto
@@ -1,41 +1,63 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * IRM messages
+ *
+ *    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.
+ */
+
 import "dif_config.proto";
 
 enum irm_msg_code {
-        IRM_CREATE_IPCP = 1;
-        IRM_DESTROY_IPCP = 2;
-        IRM_BOOTSTRAP_IPCP = 3;
-        IRM_ENROLL_IPCP = 4;
-        IRM_REG_IPCP = 5;
-        IRM_UNREG_IPCP = 6;
-        IRM_AP_REG = 7;
-        IRM_AP_UNREG = 8;
-        IRM_FLOW_ACCEPT = 9;
-        IRM_FLOW_ALLOC_RESP = 10;
-        IRM_FLOW_ALLOC = 11;
-        IRM_FLOW_ALLOC_RES = 12;
-        IRM_FLOW_DEALLOC = 13;
-        IRM_FLOW_CONTROL = 14;
-        IRM_FLOW_WRITE = 15;
-        IRM_FLOW_READ = 16;
-        IPCP_FLOW_REQ_ARR = 17;
+        IRM_CREATE_IPCP       =  1;
+        IRM_DESTROY_IPCP      =  2;
+        IRM_BOOTSTRAP_IPCP    =  3;
+        IRM_ENROLL_IPCP       =  4;
+        IRM_REG_IPCP          =  5;
+        IRM_UNREG_IPCP        =  6;
+        IRM_AP_REG            =  7;
+        IRM_AP_UNREG          =  8;
+        IRM_FLOW_ACCEPT       =  9;
+        IRM_FLOW_ALLOC_RESP   = 10;
+        IRM_FLOW_ALLOC        = 11;
+        IRM_FLOW_ALLOC_RES    = 12;
+        IRM_FLOW_DEALLOC      = 13;
+        IRM_FLOW_CONTROL      = 14;
+        IRM_FLOW_WRITE        = 15;
+        IRM_FLOW_READ         = 16;
+        IPCP_FLOW_REQ_ARR     = 17;
         IPCP_FLOW_ALLOC_REPLY = 18;
-        IPCP_FLOW_DEALLOC = 19;
-        IRM_REPLY = 20;
+        IPCP_FLOW_DEALLOC     = 19;
+        IRM_REPLY             = 20;
 };
 
 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 api_id       =  3;
         optional uint32 ipcp_type    =  5;
         repeated string dif_name     =  6;
         optional int32 fd            =  7;
-        optional int32 result        =  8;
+        optional int32 response      =  8;
         optional int32 oflags        =  9;
-        optional string dst_ap_name  = 10;
+        optional string dst_name     = 10;
         optional uint32 port_id      = 11;
-        optional uint32 reg_ap_id    = 12;
-        optional int32 pid           = 13;
-        optional dif_config_msg conf = 14;
+        optional int32 pid           = 12;
+        optional dif_config_msg conf = 13;
+        optional int32 result        = 14;
 };
diff --git a/src/tools/echo/echo_server.c b/src/tools/echo/echo_server.c
index b1547d8c..e457e22b 100644
--- a/src/tools/echo/echo_server.c
+++ b/src/tools/echo/echo_server.c
@@ -64,15 +64,16 @@ int server_main()
                 return -1;
         }
 
+        printf("Echo server started...\n");
+
         while (true) {
                 client_fd = flow_accept(server_fd,
                                         client_name, NULL);
                 if (client_fd < 0) {
-                        printf("Failed to accept flow\n");
                         continue;
                 }
 
-                printf("New flow from %s", client_name);
+                printf("New flow from %s\n", client_name);
 
                 if (flow_alloc_resp(client_fd, 0)) {
                         printf("Failed to give an allocate response\n");
diff --git a/src/tools/irm/irm_create_ipcp.c b/src/tools/irm/irm_create_ipcp.c
index 08b55259..e82bd980 100644
--- a/src/tools/irm/irm_create_ipcp.c
+++ b/src/tools/irm/irm_create_ipcp.c
@@ -39,7 +39,6 @@ static void usage()
 {
         printf("Usage: irm create_ipcp\n"
                "           ap <application process name>\n"
-               "           [api <application process instance>]\n"
                "           type [TYPE]\n\n"
                "where TYPE = {" NORMAL " " SHIM_UDP "}\n");
 }
@@ -47,16 +46,14 @@ static void usage()
 int do_create_ipcp(int argc, char ** argv)
 {
         char * ipcp_type = NULL;
-        instance_name_t api = {NULL, 0};
+        char * ipcp_name = NULL;
         enum ipcp_type type = 0;
 
         while (argc > 0) {
                 if (matches(*argv, "type") == 0) {
                         ipcp_type = *(argv + 1);
                 } else if (matches(*argv, "ap") == 0) {
-                        api.name = *(argv + 1);
-                } else if (matches(*argv, "api") == 0) {
-                        api.id = atoi(*(argv + 1));
+                        ipcp_name = *(argv + 1);
                 } else {
                         printf("\"%s\" is unknown, try \"irm "
                                "create_ipcp\".\n", *argv);
@@ -67,7 +64,7 @@ int do_create_ipcp(int argc, char ** argv)
                 argv += 2;
         }
 
-        if (ipcp_type == NULL || api.name == NULL) {
+        if (ipcp_type == NULL || ipcp_name == NULL) {
                 usage();
                 return -1;
         }
@@ -81,5 +78,5 @@ int do_create_ipcp(int argc, char ** argv)
                 return -1;
         }
 
-        return irm_create_ipcp(&api, type);
+        return !irm_create_ipcp(ipcp_name, type);
 }