1 files changed, 213 insertions, 0 deletions
diff --git a/src/ipcpd/normal/neighbors.c b/src/ipcpd/normal/neighbors.c
new file mode 100644
index 00000000..1c399145
--- /dev/null
+++ b/src/ipcpd/normal/neighbors.c
@@ -0,0 +1,213 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Data transfer neighbors
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#define OUROBOROS_PREFIX "neighbors"
+
+#include <ouroboros/config.h>
+#include <ouroboros/shared.h>
+#include <ouroboros/ipcp-dev.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/logs.h>
+
+#include "neighbors.h"
+
+#include <stdlib.h>
+#include <assert.h>
+#include <inttypes.h>
+
+static void notify_listeners(enum nb_event event,
+                             struct nb *   nb,
+                             struct nbs *  nbs)
+{
+        struct list_head * p = NULL;
+
+        list_for_each(p, &nbs->notifiers) {
+                struct nb_notifier * e =
+                        list_entry(p, struct nb_notifier, next);
+                if (e->notify_call(event, nb->conn))
+                        log_err("Listener reported an error.");
+        }
+}
+
+struct nbs * nbs_create(void)
+{
+        struct nbs * nbs;
+
+        nbs = malloc(sizeof(*nbs));
+        if (nbs == NULL)
+                return NULL;
+
+        list_head_init(&nbs->list);
+        list_head_init(&nbs->notifiers);
+
+        if (pthread_mutex_init(&nbs->list_lock, NULL))
+                return NULL;
+
+        if (pthread_mutex_init(&nbs->notifiers_lock, NULL)) {
+                pthread_mutex_destroy(&nbs->list_lock);
+                return NULL;
+        }
+
+        return nbs;
+}
+
+void nbs_destroy(struct nbs * nbs)
+{
+        struct list_head * p = NULL;
+        struct list_head * n = NULL;
+
+        assert(nbs);
+
+        pthread_mutex_lock(&nbs->list_lock);
+
+        list_for_each_safe(p, n, &nbs->list) {
+                struct nb * e = list_entry(p, struct nb, next);
+                list_del(&e->next);
+                free(e);
+        }
+
+        pthread_mutex_unlock(&nbs->list_lock);
+
+        pthread_mutex_destroy(&nbs->list_lock);
+        pthread_mutex_destroy(&nbs->notifiers_lock);
+}
+
+int nbs_add(struct nbs * nbs,
+            struct conn  conn)
+{
+        struct nb * nb;
+
+        assert(nbs);
+
+        nb = malloc(sizeof(*nb));
+        if (nb == NULL)
+                return -ENOMEM;
+
+        nb->conn = conn;
+
+        list_head_init(&nb->next);
+
+        pthread_mutex_lock(&nbs->list_lock);
+
+        list_add(&nb->next, &nbs->list);
+
+        notify_listeners(NEIGHBOR_ADDED, nb, nbs);
+
+        pthread_mutex_unlock(&nbs->list_lock);
+
+        log_info("Added neighbor with address %" PRIu64 " to list.",
+                 conn.conn_info.addr);
+
+        return 0;
+}
+
+int nbs_update_qos(struct nbs * nbs,
+                   int          fd,
+                   qosspec_t    qs)
+{
+        struct list_head * p = NULL;
+
+        assert(nbs);
+
+        pthread_mutex_lock(&nbs->list_lock);
+
+        list_for_each(p, &nbs->list) {
+                struct nb * e = list_entry(p, struct nb, next);
+                if (e->conn.flow_info.fd == fd) {
+                        e->conn.flow_info.qs = qs;
+
+                        notify_listeners(NEIGHBOR_QOS_CHANGE, e, nbs);
+
+                        pthread_mutex_unlock(&nbs->list_lock);
+                        return 0;
+                }
+        }
+
+        pthread_mutex_unlock(&nbs->list_lock);
+
+        return -1;
+}
+
+int nbs_del(struct nbs * nbs,
+            int          fd)
+{
+        struct list_head * p = NULL;
+        struct list_head * n = NULL;
+
+        assert(nbs);
+
+        pthread_mutex_lock(&nbs->list_lock);
+
+        list_for_each_safe(p, n, &nbs->list) {
+                struct nb * e = list_entry(p, struct nb, next);
+                if (e->conn.flow_info.fd == fd) {
+                        notify_listeners(NEIGHBOR_REMOVED, e, nbs);
+                        list_del(&e->next);
+                        free(e);
+                        pthread_mutex_unlock(&nbs->list_lock);
+                        return 0;
+                }
+        }
+
+        pthread_mutex_unlock(&nbs->list_lock);
+
+        return -1;
+}
+
+int nbs_reg_notifier(struct nbs *         nbs,
+                     struct nb_notifier * notify)
+{
+        assert(nbs);
+        assert(notify);
+
+        pthread_mutex_lock(&nbs->notifiers_lock);
+
+        list_head_init(&notify->next);
+        list_add(&notify->next, &nbs->notifiers);
+
+        pthread_mutex_unlock(&nbs->notifiers_lock);
+
+        return 0;
+}
+
+int nbs_unreg_notifier(struct nbs *         nbs,
+                       struct nb_notifier * notify)
+{
+        struct list_head * p = NULL;
+        struct list_head * n = NULL;
+
+        pthread_mutex_lock(&nbs->notifiers_lock);
+
+        list_for_each_safe(p, n, &nbs->notifiers) {
+                struct nb_notifier * e =
+                        list_entry(p, struct nb_notifier, next);
+                if (e == notify) {
+                        list_del(&e->next);
+                        pthread_mutex_unlock(&nbs->notifiers_lock);
+                        return 0;
+                }
+        }
+
+        pthread_mutex_unlock(&nbs->notifiers_lock);
+
+        return -1;
+}