Merged in dstaesse/ouroboros/be-qoscube (pull request #329)

Some fixes

16 files changed, 372 insertions, 357 deletions

diff --git a/src/ipcpd/ipcp-ops.h b/src/ipcpd/ipcp-ops.h
index 9872b00c..d780c6dc 100644
--- a/src/ipcpd/ipcp-ops.h
+++ b/src/ipcpd/ipcp-ops.h
@@ -37,10 +37,10 @@ struct ipcp_ops {
 
         int   (* ipcp_name_query)(char * name);
 
-        int   (* ipcp_flow_alloc)(int           fd,
-                                  char *        dst_ap_name,
-                                  char *        src_ae_name,
-                                  enum qos_cube qos);
+        int   (* ipcp_flow_alloc)(int       fd,
+                                  char *    dst_ap_name,
+                                  char *    src_ae_name,
+                                  qoscube_t qos);
 
         int   (* ipcp_flow_alloc_resp)(int fd,
                                        int response);
diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 8bd2ba77..8c0bd0bf 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -19,7 +19,6 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-
 #define OUROBOROS_PREFIX "ipcpd/ipcp"
 
 #include <ouroboros/config.h>
@@ -37,178 +36,7 @@
 #include <sys/socket.h>
 #include <stdlib.h>
 
-int ipcp_init(enum ipcp_type type, struct ipcp_ops * ops)
-{
-        pthread_condattr_t cattr;
-        int t;
-
-        struct timeval tv = {(IPCP_ACCEPT_TIMEOUT / 1000),
-                             (IPCP_ACCEPT_TIMEOUT % 1000) * 1000};
-
-        ipcpi.irmd_fd = -1;
-        ipcpi.state   = IPCP_INIT;
-
-        ipcpi.threadpool = malloc(sizeof(pthread_t) * IPCPD_THREADPOOL_SIZE);
-        if (ipcpi.threadpool == NULL) {
-                return -ENOMEM;
-        }
-
-        ipcpi.sock_path = ipcp_sock_path(getpid());
-        if (ipcpi.sock_path == NULL) {
-                free(ipcpi.threadpool);
-                return -1;
-        }
-
-        ipcpi.sockfd = server_socket_open(ipcpi.sock_path);
-        if (ipcpi.sockfd < 0) {
-                LOG_ERR("Could not open server socket.");
-                free(ipcpi.threadpool);
-                free(ipcpi.sock_path);
-                return -1;
-        }
-
-        if (setsockopt(ipcpi.sockfd, SOL_SOCKET, SO_RCVTIMEO,
-                       (void *) &tv, sizeof(tv)))
-                LOG_WARN("Failed to set timeout on socket.");
-
-        ipcpi.ops = ops;
-
-        ipcpi.data = ipcp_data_create();
-        if (ipcpi.data == NULL) {
-                free(ipcpi.threadpool);
-                free(ipcpi.sock_path);
-                return -ENOMEM;
-        }
-
-        ipcp_data_init(ipcpi.data, type);
-
-        pthread_rwlock_init(&ipcpi.state_lock, NULL);
-        pthread_mutex_init(&ipcpi.state_mtx, NULL);
-        pthread_condattr_init(&cattr);
-#ifndef __APPLE__
-        pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
-#endif
-        pthread_cond_init(&ipcpi.state_cond, &cattr);
-
-        for (t = 0; t < IPCPD_THREADPOOL_SIZE; ++t)
-                pthread_create(&ipcpi.threadpool[t], NULL,
-                               ipcp_main_loop, NULL);
-
-        return 0;
-}
-
-void ipcp_fini()
-{
-        int t;
-
-        for (t = 0; t < IPCPD_THREADPOOL_SIZE; ++t)
-                pthread_join(ipcpi.threadpool[t], NULL);
-
-        close(ipcpi.sockfd);
-        if (unlink(ipcpi.sock_path))
-                LOG_DBG("Could not unlink %s.", ipcpi.sock_path);
-
-        free(ipcpi.sock_path);
-        free(ipcpi.threadpool);
-
-        ipcp_data_destroy(ipcpi.data);
-        pthread_cond_destroy(&ipcpi.state_cond);
-        pthread_rwlock_destroy(&ipcpi.state_lock);
-}
-
-void ipcp_set_state(enum ipcp_state state)
-{
-        pthread_mutex_lock(&ipcpi.state_mtx);
-
-        ipcpi.state = state;
-
-        pthread_cond_broadcast(&ipcpi.state_cond);
-        pthread_mutex_unlock(&ipcpi.state_mtx);
-}
-
-enum ipcp_state ipcp_get_state()
-{
-        enum ipcp_state state;
-
-        pthread_mutex_lock(&ipcpi.state_mtx);
-
-        state = ipcpi.state;
-
-        pthread_mutex_unlock(&ipcpi.state_mtx);
-
-        return state;
-}
-
-int ipcp_wait_state(enum ipcp_state         state,
-                    const struct timespec * timeout)
-{
-        struct timespec abstime;
-
-        clock_gettime(PTHREAD_COND_CLOCK, &abstime);
-        ts_add(&abstime, timeout, &abstime);
-
-        pthread_mutex_lock(&ipcpi.state_mtx);
-
-        while (ipcpi.state != state && ipcpi.state != IPCP_SHUTDOWN) {
-                int ret;
-                if (timeout == NULL)
-                        ret = pthread_cond_wait(&ipcpi.state_cond,
-                                                &ipcpi.state_mtx);
-                else
-                        ret = pthread_cond_timedwait(&ipcpi.state_cond,
-                                                     &ipcpi.state_mtx,
-                                                     &abstime);
-                if (ret) {
-                        pthread_mutex_unlock(&ipcpi.state_mtx);
-                        return -ret;
-                }
-        }
-
-        pthread_mutex_unlock(&ipcpi.state_mtx);
-
-        return 0;
-}
-
-int ipcp_parse_arg(int argc, char * argv[])
-{
-        char * log_file;
-        size_t len = 0;
-
-        if (!(argc == 3 || argc == 2))
-                return -1;
-
-        /* argument 1: api of irmd */
-        if (atoi(argv[1]) == 0)
-                return -1;
-
-        if (argv[2] == NULL)
-                return 0;
-
-        len += strlen(INSTALL_PREFIX);
-        len += strlen(LOG_DIR);
-        len += strlen(argv[2]);
-
-        log_file = malloc(len + 1);
-        if (log_file == NULL) {
-                LOG_ERR("Failed to malloc");
-                return -1;
-        }
-
-        strcpy(log_file, INSTALL_PREFIX);
-        strcat(log_file, LOG_DIR);
-        strcat(log_file, argv[2]);
-        log_file[len] = '\0';
-
-        if (set_logfile(log_file))
-                LOG_ERR("Cannot open %s, falling back to stdout for logs.",
-                        log_file);
-
-        free(log_file);
-
-        return 0;
-}
-
-void * ipcp_main_loop(void * o)
+static void * ipcp_main_loop(void * o)
 {
         int     lsockfd;
         uint8_t buf[IPCP_MSG_BUF_SIZE];
@@ -446,3 +274,171 @@ void * ipcp_main_loop(void * o)
 
         return (void *) 0;
 }
+
+int ipcp_init(enum ipcp_type type, struct ipcp_ops * ops)
+{
+        pthread_condattr_t cattr;
+        int t;
+
+        struct timeval tv = {(IPCP_ACCEPT_TIMEOUT / 1000),
+                             (IPCP_ACCEPT_TIMEOUT % 1000) * 1000};
+
+        ipcpi.irmd_fd = -1;
+        ipcpi.state   = IPCP_INIT;
+
+        ipcpi.threadpool = malloc(sizeof(pthread_t) * IPCPD_THREADPOOL_SIZE);
+        if (ipcpi.threadpool == NULL) {
+                return -ENOMEM;
+        }
+
+        ipcpi.sock_path = ipcp_sock_path(getpid());
+        if (ipcpi.sock_path == NULL) {
+                free(ipcpi.threadpool);
+                return -1;
+        }
+
+        ipcpi.sockfd = server_socket_open(ipcpi.sock_path);
+        if (ipcpi.sockfd < 0) {
+                LOG_ERR("Could not open server socket.");
+                free(ipcpi.threadpool);
+                free(ipcpi.sock_path);
+                return -1;
+        }
+
+        if (setsockopt(ipcpi.sockfd, SOL_SOCKET, SO_RCVTIMEO,
+                       (void *) &tv, sizeof(tv)))
+                LOG_WARN("Failed to set timeout on socket.");
+
+        ipcpi.ops = ops;
+
+        ipcpi.data = ipcp_data_create();
+        if (ipcpi.data == NULL) {
+                free(ipcpi.threadpool);
+                free(ipcpi.sock_path);
+                return -ENOMEM;
+        }
+
+        ipcp_data_init(ipcpi.data, type);
+
+        pthread_rwlock_init(&ipcpi.state_lock, NULL);
+        pthread_mutex_init(&ipcpi.state_mtx, NULL);
+        pthread_condattr_init(&cattr);
+#ifndef __APPLE__
+        pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
+#endif
+        pthread_cond_init(&ipcpi.state_cond, &cattr);
+
+        for (t = 0; t < IPCPD_THREADPOOL_SIZE; ++t)
+                pthread_create(&ipcpi.threadpool[t], NULL,
+                               ipcp_main_loop, NULL);
+
+        return 0;
+}
+
+void ipcp_fini()
+{
+        int t;
+
+        for (t = 0; t < IPCPD_THREADPOOL_SIZE; ++t)
+                pthread_join(ipcpi.threadpool[t], NULL);
+
+        close(ipcpi.sockfd);
+        if (unlink(ipcpi.sock_path))
+                LOG_DBG("Could not unlink %s.", ipcpi.sock_path);
+
+        free(ipcpi.sock_path);
+        free(ipcpi.threadpool);
+
+        ipcp_data_destroy(ipcpi.data);
+
+        pthread_cond_destroy(&ipcpi.state_cond);
+        pthread_rwlock_destroy(&ipcpi.state_lock);
+}
+
+void ipcp_set_state(enum ipcp_state state)
+{
+        pthread_mutex_lock(&ipcpi.state_mtx);
+
+        ipcpi.state = state;
+
+        pthread_cond_broadcast(&ipcpi.state_cond);
+        pthread_mutex_unlock(&ipcpi.state_mtx);
+}
+
+enum ipcp_state ipcp_get_state()
+{
+        enum ipcp_state state;
+
+        pthread_mutex_lock(&ipcpi.state_mtx);
+
+        state = ipcpi.state;
+
+        pthread_mutex_unlock(&ipcpi.state_mtx);
+
+        return state;
+}
+
+int ipcp_wait_state(enum ipcp_state         state,
+                    const struct timespec * timeout)
+{
+        struct timespec abstime;
+        int ret = 0;
+
+        clock_gettime(PTHREAD_COND_CLOCK, &abstime);
+        ts_add(&abstime, timeout, &abstime);
+
+        pthread_mutex_lock(&ipcpi.state_mtx);
+
+        while (ipcpi.state != state && ipcpi.state != IPCP_SHUTDOWN) {
+                if (timeout == NULL)
+                        ret = -pthread_cond_wait(&ipcpi.state_cond,
+                                                 &ipcpi.state_mtx);
+                else
+                        ret = -pthread_cond_timedwait(&ipcpi.state_cond,
+                                                      &ipcpi.state_mtx,
+                                                      &abstime);
+        }
+
+        pthread_mutex_unlock(&ipcpi.state_mtx);
+
+        return ret;
+}
+
+int ipcp_parse_arg(int argc, char * argv[])
+{
+        char * log_file;
+        size_t len = 0;
+
+        if (!(argc == 3 || argc == 2))
+                return -1;
+
+        /* argument 1: api of irmd */
+        if (atoi(argv[1]) == 0)
+                return -1;
+
+        if (argv[2] == NULL)
+                return 0;
+
+        len += strlen(INSTALL_PREFIX);
+        len += strlen(LOG_DIR);
+        len += strlen(argv[2]);
+
+        log_file = malloc(len + 1);
+        if (log_file == NULL) {
+                LOG_ERR("Failed to malloc");
+                return -1;
+        }
+
+        strcpy(log_file, INSTALL_PREFIX);
+        strcat(log_file, LOG_DIR);
+        strcat(log_file, argv[2]);
+        log_file[len] = '\0';
+
+        if (set_logfile(log_file))
+                LOG_ERR("Cannot open %s, falling back to stdout for logs.",
+                        log_file);
+
+        free(log_file);
+
+        return 0;
+}
diff --git a/src/ipcpd/ipcp.h b/src/ipcpd/ipcp.h
index 6cd6f99e..f090f415 100644
--- a/src/ipcpd/ipcp.h
+++ b/src/ipcpd/ipcp.h
@@ -66,8 +66,6 @@ enum ipcp_state ipcp_get_state(void);
 int             ipcp_wait_state(enum ipcp_state         state,
                                 const struct timespec * timeout);
 
-void *          ipcp_main_loop(void * o);
-
 int             ipcp_parse_arg(int argc,
                                char * argv[]);
 
diff --git a/src/ipcpd/normal/fmgr.h b/src/ipcpd/normal/fmgr.h
index 30267666..e17f3f55 100644
--- a/src/ipcpd/normal/fmgr.h
+++ b/src/ipcpd/normal/fmgr.h
@@ -37,10 +37,10 @@ int fmgr_init(void);
 
 int fmgr_fini(void);
 
-int fmgr_np1_alloc(int           fd,
-                   char *        dst_ap_name,
-                   char *        src_ae_name,
-                   enum qos_cube qos);
+int fmgr_np1_alloc(int       fd,
+                   char *    dst_ap_name,
+                   char *    src_ae_name,
+                   qoscube_t qos);
 
 int fmgr_np1_alloc_resp(int fd,
                         int response);
@@ -55,8 +55,8 @@ int fmgr_np1_post_sdu(cep_id_t             id,
 
 int fmgr_nm1_mgmt_flow(char * dst_name);
 
-int fmgr_nm1_dt_flow(char * dst_name,
-                     enum qos_cube qos);
+int fmgr_nm1_dt_flow(char *    dst_name,
+                     qoscube_t qos);
 
 int fmgr_nm1_write_sdu(struct pci *         pci,
                        struct shm_du_buff * sdb);
diff --git a/src/ipcpd/normal/frct.c b/src/ipcpd/normal/frct.c
index a45e3528..33bd044b 100644
--- a/src/ipcpd/normal/frct.c
+++ b/src/ipcpd/normal/frct.c
@@ -43,7 +43,7 @@ struct frct_i {
         uint32_t cep_id;
         uint64_t r_address;
         uint32_t r_cep_id;
-        enum qos_cube cube;
+        qoscube_t cube;
         uint64_t seqno;
 
         enum conn_state state;
@@ -217,9 +217,9 @@ static void destroy_frct_i(struct frct_i * instance)
         free(instance);
 }
 
-cep_id_t frct_i_create(uint64_t      address,
-                       buffer_t *    buf,
-                       enum qos_cube cube)
+cep_id_t frct_i_create(uint64_t   address,
+                       buffer_t * buf,
+                       qoscube_t  cube)
 {
         struct frct_i * instance;
         struct pci pci;
@@ -255,9 +255,9 @@ cep_id_t frct_i_create(uint64_t      address,
         return id;
 }
 
-int frct_i_accept(cep_id_t       id,
-                  buffer_t *     buf,
-                  enum qos_cube  cube)
+int frct_i_accept(cep_id_t   id,
+                  buffer_t * buf,
+                  qoscube_t  cube)
 {
         struct pci pci;
         struct frct_i * instance;
diff --git a/src/ipcpd/normal/frct.h b/src/ipcpd/normal/frct.h
index 38dcddf4..39c47cdd 100644
--- a/src/ipcpd/normal/frct.h
+++ b/src/ipcpd/normal/frct.h
@@ -33,13 +33,13 @@ int         frct_init(void);
 
 int         frct_fini(void);
 
-cep_id_t    frct_i_create(uint64_t      address,
-                          buffer_t *    buf,
-                          enum qos_cube cube);
+cep_id_t    frct_i_create(uint64_t   address,
+                          buffer_t * buf,
+                          qoscube_t  cube);
 
-int         frct_i_accept(cep_id_t      id,
-                          buffer_t *    buf,
-                          enum qos_cube cube);
+int         frct_i_accept(cep_id_t   id,
+                          buffer_t * buf,
+                          qoscube_t  cube);
 
 int         frct_i_destroy(cep_id_t   id,
                            buffer_t * buf);
diff --git a/src/irmd/main.c b/src/irmd/main.c
index 5ba61fa0..c42f2d3c 100644
--- a/src/irmd/main.c
+++ b/src/irmd/main.c
@@ -973,11 +973,8 @@ static struct irm_flow * flow_accept(pid_t api, char ** dst_ae_name)
                 struct str_el * s = list_entry(p, struct str_el, next);
                 LOG_DBG("        %s", s->str);
                 re = registry_get_entry(&irmd->registry, s->str);
-                if (re != NULL) {
-                        pthread_mutex_lock(&re->state_lock);
+                if (re != NULL)
                         reg_entry_add_api(re, api);
-                        pthread_mutex_unlock(&re->state_lock);
-                }
         }
 
         pthread_rwlock_unlock(&irmd->reg_lock);
@@ -1015,17 +1012,12 @@ static struct irm_flow * flow_accept(pid_t api, char ** dst_ae_name)
 
         pthread_mutex_unlock(&e->state_lock);
 
-        pthread_mutex_lock(&re->state_lock);
-
-        if (re->state != REG_NAME_FLOW_ARRIVED) {
-                pthread_mutex_unlock(&re->state_lock);
+        if (reg_entry_get_state(re) != REG_NAME_FLOW_ARRIVED) {
                 pthread_rwlock_unlock(&irmd->reg_lock);
                 pthread_rwlock_unlock(&irmd->state_lock);
                 return NULL;
         }
-        pthread_mutex_unlock(&re->state_lock);
         pthread_rwlock_unlock(&irmd->reg_lock);
-
         pthread_rwlock_rdlock(&irmd->flows_lock);
 
         f = get_irm_flow_n(api);
@@ -1085,22 +1077,16 @@ static int flow_alloc_resp(pid_t n_api,
                 return -1;
         }
 
-        pthread_mutex_lock(&re->state_lock);
-
-        if (re->state != REG_NAME_FLOW_ARRIVED) {
-                pthread_mutex_unlock(&re->state_lock);
+        if (reg_entry_get_state(re) != REG_NAME_FLOW_ARRIVED) {
                 pthread_rwlock_unlock(&irmd->reg_lock);
                 pthread_rwlock_unlock(&irmd->state_lock);
                 LOG_ERR("Name %s has no pending flow request.", re->name);
                 return -1;
         }
 
-        pthread_mutex_unlock(&re->state_lock);
-
         registry_del_api(&irmd->registry, n_api);
 
         pthread_rwlock_unlock(&irmd->reg_lock);
-
         pthread_rwlock_wrlock(&irmd->flows_lock);
 
         f = get_irm_flow(port_id);
@@ -1335,8 +1321,6 @@ static struct irm_flow * flow_req_arr(pid_t  api,
         struct api_entry * e  = NULL;
         struct irm_flow *  f  = NULL;
 
-        enum reg_name_state state;
-
         struct pid_el * c_api;
         pid_t h_api = -1;
         int port_id = -1;
@@ -1355,11 +1339,7 @@ static struct irm_flow * flow_req_arr(pid_t  api,
                 return NULL;
         }
 
-        pthread_mutex_lock(&re->state_lock);
-        state = re->state;
-        pthread_mutex_unlock(&re->state_lock);
-
-        switch (state) {
+        switch (reg_entry_get_state(re)) {
         case REG_NAME_IDLE:
                 pthread_rwlock_unlock(&irmd->reg_lock);
                 pthread_rwlock_unlock(&irmd->state_lock);
@@ -1373,16 +1353,12 @@ static struct irm_flow * flow_req_arr(pid_t  api,
                         return NULL;
                 }
 
-                pthread_mutex_lock(&re->state_lock);
-
-                re->state = REG_NAME_AUTO_EXEC;
+                reg_entry_set_state(re, REG_NAME_AUTO_EXEC);
                 a = apn_table_get_by_apn(&irmd->apn_table,
                                          reg_entry_get_apn(re));
-                pthread_mutex_unlock(&re->state_lock);
+
                 if (a == NULL || (c_api->pid = auto_execute(a->argv)) < 0) {
-                        pthread_mutex_lock(&re->state_lock);
-                        re->state = REG_NAME_AUTO_ACCEPT;
-                        pthread_mutex_unlock(&re->state_lock);
+                        reg_entry_set_state(re, REG_NAME_AUTO_ACCEPT);
                         pthread_rwlock_unlock(&irmd->reg_lock);
                         pthread_rwlock_unlock(&irmd->state_lock);
                         LOG_ERR("Could not get start apn for reg_entry %s.",
@@ -1396,32 +1372,19 @@ static struct irm_flow * flow_req_arr(pid_t  api,
                 pthread_rwlock_unlock(&irmd->reg_lock);
                 pthread_rwlock_unlock(&irmd->state_lock);
 
-                pthread_mutex_lock(&re->state_lock);
-
-                while (re->state == REG_NAME_AUTO_EXEC)
-                        pthread_cond_wait(&re->state_cond, &re->state_lock);
-
-                pthread_mutex_unlock(&re->state_lock);
+                reg_entry_leave_state(re, REG_NAME_AUTO_EXEC);
 
                 pthread_rwlock_rdlock(&irmd->state_lock);
                 pthread_rwlock_rdlock(&irmd->reg_lock);
 
-                pthread_mutex_lock(&re->state_lock);
-
-                if (re->state == REG_NAME_DESTROY) {
-                        re->state = REG_NAME_NULL;
-                        pthread_mutex_unlock(&re->state_lock);
+                if (reg_entry_get_state(re) == REG_NAME_DESTROY) {
+                        reg_entry_set_state(re, REG_NAME_NULL);
                         pthread_rwlock_unlock(&irmd->reg_lock);
                         pthread_rwlock_unlock(&irmd->state_lock);
                         return NULL;
                 }
-
-                pthread_mutex_unlock(&re->state_lock);
-
         case REG_NAME_FLOW_ACCEPT:
-                pthread_mutex_lock(&re->state_lock);
                 h_api = reg_entry_get_api(re);
-                pthread_mutex_unlock(&re->state_lock);
                 if (h_api == -1) {
                         pthread_rwlock_unlock(&irmd->reg_lock);
                         pthread_rwlock_unlock(&irmd->state_lock);
@@ -1459,14 +1422,10 @@ static struct irm_flow * flow_req_arr(pid_t  api,
         list_add(&f->next, &irmd->irm_flows);
 
         pthread_rwlock_unlock(&irmd->flows_lock);
-
         pthread_rwlock_rdlock(&irmd->reg_lock);
-        pthread_mutex_lock(&re->state_lock);
 
         re->req_ae_name = ae_name;
-        re->state = REG_NAME_FLOW_ARRIVED;
-
-        pthread_mutex_unlock(&re->state_lock);
+        reg_entry_set_state(re, REG_NAME_FLOW_ARRIVED);
 
         e = api_table_get(&irmd->api_table, h_api);
         if (e == NULL) {
@@ -1487,12 +1446,7 @@ static struct irm_flow * flow_req_arr(pid_t  api,
         pthread_rwlock_unlock(&irmd->reg_lock);
         pthread_rwlock_unlock(&irmd->state_lock);
 
-        pthread_mutex_lock(&re->state_lock);
-
-        while (re->state == REG_NAME_FLOW_ARRIVED)
-                pthread_cond_wait(&re->state_cond, &re->state_lock);
-
-        pthread_mutex_unlock(&re->state_lock);
+        reg_entry_leave_state(re, REG_NAME_FLOW_ARRIVED);
 
         return f;
 }
diff --git a/src/irmd/registry.c b/src/irmd/registry.c
index 61d562fc..34d0a921 100644
--- a/src/irmd/registry.c
+++ b/src/irmd/registry.c
@@ -278,6 +278,9 @@ int reg_entry_add_api(struct reg_entry * e, pid_t api)
                 return -ENOMEM;
 
         i->pid = api;
+
+        pthread_mutex_lock(&e->state_lock);
+
         list_add(&i->next, &e->reg_apis);
 
         if (e->state == REG_NAME_IDLE ||
@@ -287,6 +290,8 @@ int reg_entry_add_api(struct reg_entry * e, pid_t api)
                 pthread_cond_signal(&e->state_cond);
         }
 
+        pthread_mutex_unlock(&e->state_lock);
+
         return 0;
 }
 
@@ -329,6 +334,52 @@ pid_t reg_entry_get_api(struct reg_entry * e)
         return list_first_entry(&e->reg_apis, struct pid_el, next)->pid;
 }
 
+enum reg_name_state reg_entry_get_state(struct reg_entry * e)
+{
+        enum reg_name_state state;
+
+        if (e == NULL)
+                return REG_NAME_NULL;
+
+        pthread_mutex_lock(&e->state_lock);
+
+        state = e->state;
+
+        pthread_mutex_unlock(&e->state_lock);
+
+        return state;
+}
+
+int reg_entry_set_state(struct reg_entry * e, enum reg_name_state state)
+{
+        if (state == REG_NAME_DESTROY)
+                return -EPERM;
+
+        pthread_mutex_lock(&e->state_lock);
+
+        e->state = state;
+        pthread_cond_broadcast(&e->state_cond);
+
+        pthread_mutex_unlock(&e->state_lock);
+
+        return 0;
+}
+
+int reg_entry_leave_state(struct reg_entry * e, enum reg_name_state state)
+{
+        if (e == NULL || state == REG_NAME_DESTROY)
+                return -EINVAL;
+
+        pthread_mutex_lock(&e->state_lock);
+
+        while (e->state == state)
+                pthread_cond_wait(&e->state_cond, &e->state_lock);
+
+        pthread_mutex_unlock(&e->state_lock);
+
+        return 0;
+}
+
 struct reg_entry * registry_get_entry(struct list_head * registry,
                                       char *             name)
 {
diff --git a/src/irmd/registry.h b/src/irmd/registry.h
index f0da9267..1cb1d921 100644
--- a/src/irmd/registry.h
+++ b/src/irmd/registry.h
@@ -67,46 +67,54 @@ struct reg_entry {
         pthread_mutex_t     state_lock;
 };
 
-int                reg_entry_add_apn(struct reg_entry * e,
-                                     struct apn_entry * a);
+int                 reg_entry_add_apn(struct reg_entry * e,
+                                      struct apn_entry * a);
 
-void               reg_entry_del_apn(struct reg_entry * e,
-                                     char *             apn);
+void                reg_entry_del_apn(struct reg_entry * e,
+                                      char *             apn);
 
-char *             reg_entry_get_apn(struct reg_entry * e);
+char *              reg_entry_get_apn(struct reg_entry * e);
 
 
-int                reg_entry_add_api(struct reg_entry * e,
-                                     pid_t              api);
+int                 reg_entry_add_api(struct reg_entry * e,
+                                      pid_t              api);
 
-void               reg_entry_del_api(struct reg_entry * e,
-                                     pid_t              api);
+void                reg_entry_del_api(struct reg_entry * e,
+                                      pid_t              api);
 
-pid_t              reg_entry_get_api(struct reg_entry * e);
+pid_t               reg_entry_get_api(struct reg_entry * e);
 
-struct reg_entry * registry_add_name(struct list_head * registry,
-                                     char *             name);
+enum reg_name_state reg_entry_get_state(struct reg_entry * e);
 
-void               registry_del_name(struct list_head * registry,
-                                     char *             name);
+int                 reg_entry_set_state(struct reg_entry * e,
+                                        enum reg_name_state state);
 
-void               registry_del_api(struct list_head * registry,
-                                    pid_t              api);
+int                 reg_entry_leave_state(struct reg_entry * e,
+                                          enum reg_name_state state);
 
-void               registry_sanitize_apis(struct list_head * registry);
+struct reg_entry *  registry_add_name(struct list_head * registry,
+                                      char *             name);
 
-struct reg_entry * registry_get_entry(struct list_head * registry,
+void                registry_del_name(struct list_head * registry,
                                       char *             name);
 
-int                registry_add_name_to_dif(struct list_head * registry,
-                                            char *             name,
-                                            char *             dif_name,
-                                            enum ipcp_type     type);
+void                registry_del_api(struct list_head * registry,
+                                     pid_t              api);
+
+void                registry_sanitize_apis(struct list_head * registry);
+
+struct reg_entry *  registry_get_entry(struct list_head * registry,
+                                       char *             name);
+
+int                 registry_add_name_to_dif(struct list_head * registry,
+                                             char *             name,
+                                             char *             dif_name,
+                                             enum ipcp_type     type);
 
-void               registry_del_name_from_dif(struct list_head * registry,
-                                              char *             name,
-                                              char *             dif_name);
+void                registry_del_name_from_dif(struct list_head * registry,
+                                               char *             name,
+                                               char *             dif_name);
 
-void               registry_destroy(struct list_head * registry);
+void                registry_destroy(struct list_head * registry);
 
 #endif /* OUROBOROS_IRMD_REGISTRY_H */
diff --git a/src/lib/cdap.c b/src/lib/cdap.c
index 5671c515..17104770 100644
--- a/src/lib/cdap.c
+++ b/src/lib/cdap.c
@@ -105,7 +105,8 @@ static int release_invoke_id(struct cdap * instance, int id)
 
 #define cdap_sent_has_key(i, key) (cdap_sent_get_by_key(i, key) != NULL)
 
-struct cdap_req * cdap_sent_get_by_key(struct cdap * instance, cdap_key_t key)
+static struct cdap_req * cdap_sent_get_by_key(struct cdap * instance,
+                                              cdap_key_t    key)
 {
         struct list_head * p = NULL;
         struct cdap_req *  req = NULL;
@@ -128,13 +129,17 @@ struct cdap_req * cdap_sent_get_by_key(struct cdap * instance, cdap_key_t key)
         return NULL;
 }
 
-static int cdap_sent_add(struct cdap * instance, struct cdap_req * req)
+static struct cdap_req * cdap_sent_add(struct cdap * instance, cdap_key_t key)
 {
-        assert (instance);
-        assert (req);
+        struct cdap_req * req;
 
-        if (cdap_sent_has_key(instance, req->key))
-                return -EPERM;
+        assert(instance);
+        assert(key >= 0);
+        assert(!cdap_sent_has_key(instance, key));
+
+        req = cdap_req_create(key);
+        if (req == NULL)
+                return NULL;
 
         pthread_rwlock_wrlock(&instance->sent_lock);
 
@@ -142,7 +147,7 @@ static int cdap_sent_add(struct cdap * instance, struct cdap_req * req)
 
         pthread_rwlock_unlock(&instance->sent_lock);
 
-        return 0;
+        return req;
 }
 
 static void cdap_sent_del(struct cdap * instance, struct cdap_req * req)
@@ -157,6 +162,8 @@ static void cdap_sent_del(struct cdap * instance, struct cdap_req * req)
         list_del(&req->next);
 
         pthread_rwlock_unlock(&instance->sent_lock);
+
+        cdap_req_destroy(req);
 }
 
 static void cdap_sent_destroy(struct cdap * instance)
@@ -249,6 +256,7 @@ static void * sdu_reader(void * o)
                                 free(rcvd);
                                 continue;
                         }
+
                         rcvd->iid   = msg->invoke_id;
                         rcvd->flags = msg->flags;
                         rcvd->name  = strdup(msg->name);
@@ -494,18 +502,15 @@ cdap_key_t cdap_request_send(struct cdap *    instance,
 
         key = invoke_id_to_key(iid);
 
-        req = cdap_req_create(key);
-        if (req == NULL)
-                return INVALID_CDAP_KEY;
-
-        if (cdap_sent_add(instance, req)) {
-                cdap_req_destroy(req);
+        req = cdap_sent_add(instance, key);
+        if (req == NULL) {
+                release_invoke_id(instance, iid);
                 return INVALID_CDAP_KEY;
         }
 
         if (write_msg(instance, &msg)) {
                 cdap_sent_del(instance, req);
-                cdap_req_destroy(req);
+                release_invoke_id(instance, iid);
                 return INVALID_CDAP_KEY;
         }
 
diff --git a/src/lib/cdap_req.c b/src/lib/cdap_req.c
index f80b10d7..57ad22c5 100644
--- a/src/lib/cdap_req.c
+++ b/src/lib/cdap_req.c
@@ -70,14 +70,14 @@ void cdap_req_destroy(struct cdap_req * creq)
         }
 
         if (creq->state == REQ_INIT)
-                creq->state = REQ_DONE;
+                creq->state = REQ_NULL;
 
         if (creq->state == REQ_PENDING) {
                 creq->state = REQ_DESTROY;
                 pthread_cond_broadcast(&creq->cond);
         }
 
-        while (creq->state != REQ_DONE)
+        while (creq->state != REQ_NULL)
                 pthread_cond_wait(&creq->cond, &creq->lock);
 
         pthread_mutex_unlock(&creq->lock);
@@ -109,17 +109,21 @@ int cdap_req_wait(struct cdap_req * creq)
         creq->state = REQ_PENDING;
 
         while (creq->state == REQ_PENDING) {
-                if ((ret = -pthread_cond_timedwait(&creq->cond,
-                                                   &creq->lock,
-                                                   &abstime)) == -ETIMEDOUT)
+                ret = -pthread_cond_timedwait(&creq->cond,
+                                              &creq->lock,
+                                              &abstime);
+                if (ret == -ETIMEDOUT)
                         break;
         }
 
-        if (creq->state == REQ_DESTROY)
+        if (creq->state == REQ_DESTROY) {
                 ret = -1;
-
-        creq->state = REQ_DONE;
-        pthread_cond_broadcast(&creq->cond);
+                creq->state = REQ_NULL;
+                pthread_cond_broadcast(&creq->cond);
+        } else {
+                creq->state = REQ_DONE;
+                pthread_cond_broadcast(&creq->cond);
+        }
 
         pthread_mutex_unlock(&creq->lock);
 
@@ -146,5 +150,8 @@ void cdap_req_respond(struct cdap_req * creq, int response, buffer_t data)
         while (creq->state == REQ_RESPONSE)
                 pthread_cond_wait(&creq->cond, &creq->lock);
 
+        creq->state = REQ_NULL;
+        pthread_cond_broadcast(&creq->cond);
+
         pthread_mutex_unlock(&creq->lock);
 }
diff --git a/src/lib/cdap_req.h b/src/lib/cdap_req.h
index 9d5cb0c8..b2ded060 100644
--- a/src/lib/cdap_req.h
+++ b/src/lib/cdap_req.h
@@ -31,7 +31,8 @@
 #include <pthread.h>
 
 enum creq_state {
-        REQ_INIT = 0,
+        REQ_NULL = 0,
+        REQ_INIT,
         REQ_PENDING,
         REQ_RESPONSE,
         REQ_DONE,
diff --git a/src/lib/dev.c b/src/lib/dev.c
index 8eb98506..3a1df16d 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -176,7 +176,7 @@ static int api_announce(char * ap_name)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL) {
-                return -1;
+                return -EIRMD;
         }
 
         if (!recv_msg->has_result || (ret = recv_msg->result)) {
@@ -359,7 +359,7 @@ int flow_accept(char ** ae_name, qosspec_t * qos)
 
         recv_msg = send_recv_irm_msg_b(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (!recv_msg->has_api || !recv_msg->has_port_id) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -465,7 +465,7 @@ int flow_alloc_resp(int fd, int response)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (!recv_msg->has_result) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -476,16 +476,6 @@ int flow_alloc_resp(int fd, int response)
 
         irm_msg__free_unpacked(recv_msg, NULL);
 
-        if (response) {
-                pthread_rwlock_rdlock(&ai.data_lock);
-                pthread_rwlock_wrlock(&ai.flows_lock);
-
-                reset_flow(fd);
-
-                pthread_rwlock_unlock(&ai.flows_lock);
-                pthread_rwlock_unlock(&ai.data_lock);
-        }
-
         return ret;
 }
 
@@ -517,7 +507,7 @@ int flow_alloc(char * dst_name, char * src_ae_name, qosspec_t * qos)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (!recv_msg->has_api || !recv_msg->has_port_id) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -603,27 +593,17 @@ int flow_alloc_res(int fd)
 
         recv_msg = send_recv_irm_msg_b(&msg);
         if (recv_msg == NULL)
-                result = -1;
+                return -EIRMD;
 
         if (!recv_msg->has_result) {
                 irm_msg__free_unpacked(recv_msg, NULL);
-                result = -1;
+                return -1;
         }
 
         result = recv_msg->result;
 
         irm_msg__free_unpacked(recv_msg, NULL);
 
-        if (result) {
-                pthread_rwlock_rdlock(&ai.data_lock);
-                pthread_rwlock_wrlock(&ai.flows_lock);
-
-                reset_flow(fd);
-
-                pthread_rwlock_unlock(&ai.flows_lock);
-                pthread_rwlock_unlock(&ai.data_lock);
-        }
-
         return result;
 }
 
@@ -655,9 +635,9 @@ int flow_dealloc(int fd)
         pthread_rwlock_unlock(&ai.flows_lock);
         pthread_rwlock_unlock(&ai.data_lock);
 
-        recv_msg = send_recv_irm_msg_b(&msg);
+        recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (!recv_msg->has_result) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -1208,7 +1188,7 @@ int ipcp_create_r(pid_t api)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -1254,7 +1234,7 @@ int ipcp_flow_req_arr(pid_t  api, char * dst_name, char * src_ae_name)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (!recv_msg->has_port_id || !recv_msg->has_api) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -1336,7 +1316,7 @@ int ipcp_flow_alloc_reply(int fd, int response)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
diff --git a/src/lib/irm.c b/src/lib/irm.c
index 4b9a6285..969a78c3 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -47,7 +47,7 @@ pid_t irm_create_ipcp(char *         name,
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -75,7 +75,7 @@ int irm_destroy_ipcp(pid_t api)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -147,9 +147,8 @@ int irm_bootstrap_ipcp(pid_t               api,
         }
 
         recv_msg = send_recv_irm_msg(&msg);
-        if (recv_msg == NULL) {
-                return -1;
-        }
+        if (recv_msg == NULL)
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -179,7 +178,7 @@ ssize_t irm_list_ipcps(char *   name,
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL) {
                 free(msg.dif_name);
-                return -1;
+                return -EIRMD;
         }
 
         if (recv_msg->apis == NULL) {
@@ -227,7 +226,7 @@ int irm_enroll_ipcp(pid_t  api,
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL) {
                 free(msg.dif_name);
-                return -1;
+                return -EIRMD;
         }
 
         if (recv_msg->has_result == false) {
@@ -358,8 +357,11 @@ int irm_bind_ap(char *   ap,
         msg.opts = opts;
 
         recv_msg = send_recv_irm_msg(&msg);
+
+        free(full_ap_name);
+
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -369,7 +371,6 @@ int irm_bind_ap(char *   ap,
         ret = recv_msg->result;
         irm_msg__free_unpacked(recv_msg, NULL);
 
-        free(full_ap_name);
         return ret;
 }
 
@@ -389,7 +390,7 @@ int irm_bind_api(pid_t api, char * name)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -417,7 +418,7 @@ int irm_unbind_ap(char * ap, char * name)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -446,7 +447,7 @@ int irm_unbind_api(pid_t api, char * name)
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -479,7 +480,7 @@ int irm_reg(char *   name,
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
@@ -513,7 +514,7 @@ int irm_unreg(char *   name,
 
         recv_msg = send_recv_irm_msg(&msg);
         if (recv_msg == NULL)
-                return -1;
+                return -EIRMD;
 
         if (recv_msg->has_result == false) {
                 irm_msg__free_unpacked(recv_msg, NULL);
diff --git a/src/tools/irm/irm.c b/src/tools/irm/irm.c
index 7b2f3331..ce92d3d5 100644
--- a/src/tools/irm/irm.c
+++ b/src/tools/irm/irm.c
@@ -20,12 +20,15 @@
  */
 
 #include <ouroboros/irm.h>
-#include <stdio.h>
-#include <string.h>
+#include <ouroboros/errno.h>
 
 #include "irm_ops.h"
 #include "irm_utils.h"
 
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
 static void usage(void)
 {
         printf("Usage: irm [OPERATION]\n\n"
@@ -71,12 +74,23 @@ static int do_cmd(const char * argv0,
         return -1;
 }
 
-int main(int argc, char ** argv) {
+int main(int argc, char ** argv)
+{
+        int ret = 0;
 
         if (argc < 2) {
                 usage();
                 return -1;
         }
 
-        return do_cmd(argv[1], argc - 1, argv + 1);
+        ret = do_cmd(argv[1], argc - 1, argv + 1);
+
+        if (ret == -EIRMD)
+                printf("Failed to communicate with the "
+                       "Ouroboros IPC Resource Manager daemon.\n");
+
+        if (ret)
+                exit(EXIT_FAILURE);
+
+        exit(EXIT_SUCCESS);
 }
diff --git a/src/tools/irm/irm_bind_ap.c b/src/tools/irm/irm_bind_ap.c
index e8e5eb26..a5be5a03 100644
--- a/src/tools/irm/irm_bind_ap.c
+++ b/src/tools/irm/irm_bind_ap.c
@@ -90,13 +90,13 @@ int do_bind_ap(int argc, char ** argv)
         ret = irm_bind_ap(ap_name, name, flags, argc, argv);
         if (ret == -ENOENT) {
                 printf("%s does not exist.\n", ap_name);
-                return -1;
+                return ret;
         }
 
         if (ret == -EPERM) {
                 printf("Cannot execute %s, please check permissions.\n",
                         ap_name);
-                return -1;
+                return ret;
         }
 
         if (temp != NULL)