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authorSander Vrijders <sander.vrijders@ugent.be>2017-05-15 16:25:08 +0000
committerdimitri staessens <dimitri.staessens@ugent.be>2017-05-15 16:25:08 +0000
commit1b3079ce9ad79e9c9b267fde3d09b9c8166ed1e5 (patch)
treeea57e4a1e634d3b7e7325b61f6dba36d941e03ae /src/ipcpd/normal/pol
parent0fc0f3701ef4f504e71eadcc92a93faf1dd33bf4 (diff)
parent5d87cec1757c4e1c23ae778f2814363c1e39b43c (diff)
downloadouroboros-1b3079ce9ad79e9c9b267fde3d09b9c8166ed1e5.tar.gz
ouroboros-1b3079ce9ad79e9c9b267fde3d09b9c8166ed1e5.zip
Merged in sandervrijders/ouroboros/be-routing-policy (pull request #506)
ipcpd: normal: Make routing a policy
Diffstat (limited to 'src/ipcpd/normal/pol')
-rw-r--r--src/ipcpd/normal/pol/fso.proto29
-rw-r--r--src/ipcpd/normal/pol/graph.c517
-rw-r--r--src/ipcpd/normal/pol/graph.h53
-rw-r--r--src/ipcpd/normal/pol/link_state.c360
-rw-r--r--src/ipcpd/normal/pol/link_state.h43
-rw-r--r--src/ipcpd/normal/pol/tests/CMakeLists.txt34
-rw-r--r--src/ipcpd/normal/pol/tests/graph_test.c240
7 files changed, 1276 insertions, 0 deletions
diff --git a/src/ipcpd/normal/pol/fso.proto b/src/ipcpd/normal/pol/fso.proto
new file mode 100644
index 00000000..32b281d6
--- /dev/null
+++ b/src/ipcpd/normal/pol/fso.proto
@@ -0,0 +1,29 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Flow State Object message
+ *
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ * Sander Vrijders <sander.vrijders@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 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.
+ */
+
+syntax = "proto2";
+
+message fso {
+ required uint64 s_addr = 1;
+ required uint64 d_addr = 2;
+ /* Add QoS parameters of link here */
+};
diff --git a/src/ipcpd/normal/pol/graph.c b/src/ipcpd/normal/pol/graph.c
new file mode 100644
index 00000000..78ed203d
--- /dev/null
+++ b/src/ipcpd/normal/pol/graph.c
@@ -0,0 +1,517 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Undirected graph structure
+ *
+ * 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 "graph"
+
+#include <ouroboros/config.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/list.h>
+
+#include "graph.h"
+#include "ipcp.h"
+
+#include <assert.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <limits.h>
+
+struct edge {
+ struct list_head next;
+ struct vertex * nb;
+ qosspec_t qs;
+};
+
+struct vertex {
+ struct list_head next;
+ uint64_t addr;
+ struct list_head edges;
+};
+
+struct graph {
+ size_t nr_vertices;
+ struct list_head vertices;
+ pthread_mutex_t lock;
+};
+
+static struct edge * find_edge_by_addr(struct vertex * vertex,
+ uint64_t dst_addr)
+{
+ struct list_head * p = NULL;
+
+ list_for_each(p, &vertex->edges) {
+ struct edge * e = list_entry(p, struct edge, next);
+ if (e->nb->addr == dst_addr)
+ return e;
+ }
+
+ return NULL;
+}
+
+static struct vertex * find_vertex_by_addr(struct graph * graph,
+ uint64_t addr)
+{
+ struct list_head * p = NULL;
+
+ list_for_each(p, &graph->vertices) {
+ struct vertex * e = list_entry(p, struct vertex, next);
+ if (e->addr == addr)
+ return e;
+ }
+
+ return NULL;
+}
+
+static struct edge * add_edge(struct vertex * vertex,
+ struct vertex * nb)
+{
+ struct edge * edge;
+
+ edge = malloc(sizeof(*edge));
+ if (edge == NULL)
+ return NULL;
+
+ list_head_init(&edge->next);
+ edge->nb = nb;
+
+ list_add(&edge->next, &vertex->edges);
+
+ return edge;
+}
+
+static void del_edge(struct edge * edge)
+{
+ list_del(&edge->next);
+ free(edge);
+}
+
+static struct vertex * add_vertex(struct graph * graph,
+ uint64_t addr)
+{
+ struct vertex * vertex;
+ struct list_head * p;
+
+ vertex = malloc(sizeof(*vertex));
+ if (vertex == NULL)
+ return NULL;
+
+ list_head_init(&vertex->next);
+ list_head_init(&vertex->edges);
+ vertex->addr = addr;
+
+ list_for_each(p, &graph->vertices) {
+ struct vertex * v = list_entry(p, struct vertex, next);
+ if (v->addr > addr)
+ break;
+ }
+
+ list_add_tail(&vertex->next, p);
+
+ graph->nr_vertices++;
+
+ return vertex;
+}
+
+static void del_vertex(struct graph * graph,
+ struct vertex * vertex)
+{
+ struct list_head * p = NULL;
+ struct list_head * n = NULL;
+
+ list_del(&vertex->next);
+
+ list_for_each_safe(p, n, &vertex->edges) {
+ struct edge * e = list_entry(p, struct edge, next);
+ del_edge(e);
+ }
+
+ free(vertex);
+
+ graph->nr_vertices--;
+}
+
+struct graph * graph_create(void)
+{
+ struct graph * graph;
+
+ graph = malloc(sizeof(*graph));
+ if (graph == NULL)
+ return NULL;
+
+ if (pthread_mutex_init(&graph->lock, NULL)) {
+ free(graph);
+ return NULL;
+ }
+
+ graph->nr_vertices = 0;
+ list_head_init(&graph->vertices);
+
+ return graph;
+}
+
+void graph_destroy(struct graph * graph)
+{
+ struct list_head * p = NULL;
+ struct list_head * n = NULL;
+
+ assert(graph);
+
+ pthread_mutex_lock(&graph->lock);
+
+ list_for_each_safe(p, n, &graph->vertices) {
+ struct vertex * e = list_entry(p, struct vertex, next);
+ del_vertex(graph, e);
+ }
+
+ pthread_mutex_unlock(&graph->lock);
+
+ pthread_mutex_destroy(&graph->lock);
+
+ free(graph);
+}
+
+int graph_update_edge(struct graph * graph,
+ uint64_t s_addr,
+ uint64_t d_addr,
+ qosspec_t qs)
+{
+ struct vertex * v;
+ struct edge * e;
+ struct vertex * nb;
+ struct edge * nb_e;
+
+ assert(graph);
+
+ pthread_mutex_lock(&graph->lock);
+
+ v = find_vertex_by_addr(graph, s_addr);
+ if (v == NULL) {
+ v = add_vertex(graph, s_addr);
+ if (v == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ log_err("Failed to add vertex.");
+ return -ENOMEM;
+ }
+ }
+
+ nb = find_vertex_by_addr(graph, d_addr);
+ if (nb == NULL) {
+ nb = add_vertex(graph, d_addr);
+ if (nb == NULL) {
+ if (list_is_empty(&v->edges))
+ del_vertex(graph, v);
+ pthread_mutex_unlock(&graph->lock);
+ log_err("Failed to add vertex.");
+ return -ENOMEM;
+ }
+ }
+
+ e = find_edge_by_addr(v, d_addr);
+ if (e == NULL) {
+ e = add_edge(v, nb);
+ if (e == NULL) {
+ if (list_is_empty(&v->edges))
+ del_vertex(graph, v);
+ if (list_is_empty(&nb->edges))
+ del_vertex(graph, nb);
+ pthread_mutex_unlock(&graph->lock);
+ log_err("Failed to add edge.");
+ return -ENOMEM;
+ }
+ }
+
+ e->qs = qs;
+
+ nb_e = find_edge_by_addr(nb, s_addr);
+ if (nb_e == NULL) {
+ nb_e = add_edge(nb, v);
+ if (nb_e == NULL) {
+ del_edge(e);
+ if (list_is_empty(&v->edges))
+ del_vertex(graph, v);
+ if (list_is_empty(&nb->edges))
+ del_vertex(graph, nb);
+ pthread_mutex_unlock(&graph->lock);
+ log_err("Failed to add edge.");
+ return -ENOMEM;
+ }
+ }
+
+ nb_e->qs = qs;
+
+ pthread_mutex_unlock(&graph->lock);
+
+ return 0;
+}
+
+int graph_del_edge(struct graph * graph,
+ uint64_t s_addr,
+ uint64_t d_addr)
+{
+ struct vertex * v;
+ struct edge * e;
+ struct vertex * nb;
+ struct edge * nb_e;
+
+ assert(graph);
+
+ pthread_mutex_lock(&graph->lock);
+
+ v = find_vertex_by_addr(graph, s_addr);
+ if (v == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ log_err("No such vertex.");
+ return -1;
+ }
+
+ nb = find_vertex_by_addr(graph, d_addr);
+ if (nb == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ log_err("No such vertex.");
+ return -1;
+ }
+
+ e = find_edge_by_addr(v, d_addr);
+ if (e == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ log_err("No such edge.");
+ return -1;
+ }
+
+ nb_e = find_edge_by_addr(nb, s_addr);
+ if (nb_e == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ log_err("No such edge.");
+ return -1;
+ }
+
+ del_edge(e);
+ del_edge(nb_e);
+
+ /* Removing vertex if it was the last edge */
+ if (list_is_empty(&v->edges))
+ del_vertex(graph, v);
+ if (list_is_empty(&nb->edges))
+ del_vertex(graph, nb);
+
+ pthread_mutex_unlock(&graph->lock);
+
+ return 0;
+}
+
+static int get_min_vertex(struct vertex ** vertices,
+ int nr_vertices,
+ int * dist,
+ struct vertex ** v)
+{
+ int min = INT_MAX;
+ int index = -1;
+ int i;
+
+ *v = NULL;
+
+ for (i = 0; i < nr_vertices; i++) {
+ if (vertices[i] == NULL)
+ continue;
+
+ if (dist[i] < min) {
+ *v = vertices[i];
+ min = dist[i];
+ index = i;
+ }
+ }
+
+ if (index != -1)
+ vertices[index] = NULL;
+
+ return index;
+}
+
+static int get_vertex_number(struct vertex ** vertices,
+ int nr_vertices,
+ struct vertex * v)
+
+{
+ int i;
+
+ for (i = 0; i < nr_vertices; i++) {
+ if (vertices[i] == v)
+ return i;
+ }
+
+ return -1;
+}
+
+static int get_vertex_index(struct graph * graph,
+ struct vertex * v)
+
+{
+ struct list_head * p = NULL;
+ struct vertex * vertex;
+ int i = 0;
+
+ list_for_each(p, &graph->vertices) {
+ vertex = list_entry(p, struct vertex, next);
+ if (vertex == v)
+ return i;
+ i++;
+ }
+
+ return -1;
+}
+
+static struct vertex ** dijkstra(struct graph * graph,
+ uint64_t src)
+{
+ int dist[graph->nr_vertices];
+ struct vertex * vertices[graph->nr_vertices];
+ struct list_head * p = NULL;
+ int i = 0;
+ int j = 0;
+ struct vertex * v = NULL;
+ struct edge * e = NULL;
+ int alt;
+ struct vertex ** prev;
+
+ prev = malloc(sizeof(*prev) * graph->nr_vertices);
+ if (prev == NULL)
+ return NULL;
+
+ /* Init the data structures */
+ list_for_each(p, &graph->vertices) {
+ v = list_entry(p, struct vertex, next);
+ vertices[i] = v;
+ if (v->addr == src)
+ dist[i] = 0;
+ else
+ dist[i] = INT_MAX;
+ prev[i] = NULL;
+ i++;
+ }
+
+ /* Perform actual Dijkstra */
+ i = get_min_vertex(vertices, graph->nr_vertices, dist, &v);
+ while (v != NULL) {
+ list_for_each(p, &v->edges) {
+ e = list_entry(p, struct edge, next);
+
+ j = get_vertex_number(vertices,
+ graph->nr_vertices,
+ e->nb);
+ if (j == -1)
+ continue;
+
+ /*
+ * NOTE: Current weight is just hop count.
+ * Method could be extended to use a different
+ * weight for a different QoS cube.
+ */
+ alt = dist[i] + 1;
+ if (alt < dist[j]) {
+ dist[j] = alt;
+ prev[j] = v;
+ }
+ }
+ i = get_min_vertex(vertices, graph->nr_vertices, dist, &v);
+ }
+
+ return prev;
+}
+
+ssize_t graph_routing_table(struct graph * graph,
+ uint64_t s_addr,
+ struct routing_table *** table)
+{
+ struct vertex ** prevs;
+ struct list_head * p = NULL;
+ int i = 0;
+ int index = 0;
+ int j = 0;
+ int k = 0;
+ struct vertex * prev;
+ struct vertex * nhop;
+ struct vertex * v;
+
+ pthread_mutex_lock(&graph->lock);
+
+ if (graph->nr_vertices == 0) {
+ pthread_mutex_unlock(&graph->lock);
+ return 0;
+ }
+
+ prevs = dijkstra(graph, s_addr);
+ if (prevs == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ return -1;
+ }
+
+ *table = malloc(sizeof(**table) * (graph->nr_vertices - 1));
+ if (*table == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ free(prevs);
+ return -1;
+ }
+
+ /*
+ * Now loop through the list of predecessors
+ * to construct the routing table
+ */
+ list_for_each(p, &graph->vertices) {
+ v = list_entry(p, struct vertex, next);
+ prev = prevs[i];
+ nhop = v;
+
+ /* This is the src */
+ if (prev == NULL) {
+ i++;
+ continue;
+ }
+
+ index = get_vertex_index(graph, prev);
+ while (prevs[index] != NULL) {
+ nhop = prev;
+ prev = prevs[index];
+ index = get_vertex_index(graph, prev);
+ }
+
+ (*table)[j] = malloc(sizeof(***table));
+ if ((*table)[j] == NULL) {
+ pthread_mutex_unlock(&graph->lock);
+ for (k = 0; k < j; ++k)
+ free((*table)[k]);
+ free(*table);
+ free(prevs);
+ return -1;
+ }
+
+ (*table)[j]->dst = v->addr;
+ (*table)[j]->nhop = nhop->addr;
+ j++;
+ i++;
+ }
+
+ pthread_mutex_unlock(&graph->lock);
+
+ free(prevs);
+
+ return j;
+}
diff --git a/src/ipcpd/normal/pol/graph.h b/src/ipcpd/normal/pol/graph.h
new file mode 100644
index 00000000..44496bc3
--- /dev/null
+++ b/src/ipcpd/normal/pol/graph.h
@@ -0,0 +1,53 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Undirected graph structure
+ *
+ * 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.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_GRAPH_H
+#define OUROBOROS_IPCPD_NORMAL_GRAPH_H
+
+#include <ouroboros/list.h>
+#include <ouroboros/qos.h>
+
+#include <inttypes.h>
+
+struct routing_table {
+ uint64_t dst;
+ uint64_t nhop;
+};
+
+struct graph * graph_create(void);
+
+void graph_destroy(struct graph * graph);
+
+int graph_update_edge(struct graph * graph,
+ uint64_t s_addr,
+ uint64_t d_addr,
+ qosspec_t qs);
+
+int graph_del_edge(struct graph * graph,
+ uint64_t s_addr,
+ uint64_t d_addr);
+
+ssize_t graph_routing_table(struct graph * graph,
+ uint64_t s_addr,
+ struct routing_table *** table);
+
+#endif /* OUROBOROS_IPCPD_NORMAL_GRAPH_H */
diff --git a/src/ipcpd/normal/pol/link_state.c b/src/ipcpd/normal/pol/link_state.c
new file mode 100644
index 00000000..3e0a63d6
--- /dev/null
+++ b/src/ipcpd/normal/pol/link_state.c
@@ -0,0 +1,360 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Link state routing policy
+ *
+ * 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 "link-state-routing"
+
+#include <ouroboros/config.h>
+#include <ouroboros/errno.h>
+#include <ouroboros/list.h>
+#include <ouroboros/logs.h>
+#include <ouroboros/rib.h>
+#include <ouroboros/rqueue.h>
+
+#include "ribmgr.h"
+#include "ribconfig.h"
+#include "graph.h"
+#include "neighbors.h"
+#include "ipcp.h"
+#include "pff.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "fso.pb-c.h"
+typedef Fso fso_t;
+
+#define BUF_SIZE 256
+#define RECALC_TIME 4
+
+struct routing_i {
+ struct pff * pff;
+ pthread_t calculator;
+};
+
+struct {
+ struct nbs * nbs;
+ struct nb_notifier nb_notifier;
+
+ struct graph * graph;
+
+ ro_set_t * set;
+ rqueue_t * queue;
+ pthread_t rib_listener;
+} link_state;
+
+/* Take under neighbors lock */
+static int addr_to_fd(uint64_t addr)
+{
+ struct list_head * p = NULL;
+
+ list_for_each(p, &link_state.nbs->list) {
+ struct nb * e = list_entry(p, struct nb, next);
+ if (e->conn.conn_info.addr == addr)
+ return e->conn.flow_info.fd;
+ }
+
+ return -1;
+}
+
+static void * calculate_pff(void * o)
+{
+ struct routing_i * instance;
+ struct routing_table ** table;
+ ssize_t n_table;
+ int i;
+ int fd;
+
+ instance = (struct routing_i *) o;
+
+ while (true) {
+ table = NULL;
+ n_table = graph_routing_table(link_state.graph,
+ ipcpi.dt_addr, &table);
+ if (n_table < 0) {
+ sleep(RECALC_TIME);
+ continue;
+ }
+
+ pthread_mutex_lock(&link_state.nbs->list_lock);
+ pff_lock(instance->pff);
+
+ pff_flush(instance->pff);
+
+ for (i = 0; i < n_table; i++) {
+ fd = addr_to_fd(table[i]->nhop);
+ if (fd == -1)
+ continue;
+
+ pff_add(instance->pff, table[i]->dst, fd);
+ }
+
+ pff_unlock(instance->pff);
+ pthread_mutex_unlock(&link_state.nbs->list_lock);
+
+ freepp(struct routing_table, table, n_table);
+ sleep(RECALC_TIME);
+ }
+
+ return (void *) 0;
+}
+
+static int link_state_neighbor_event(enum nb_event event,
+ struct conn conn)
+{
+ char path[RIB_MAX_PATH_LEN + 1];
+ char fso_name[RIB_MAX_PATH_LEN + 1];
+ fso_t fso = FSO__INIT;
+ size_t len;
+ uint8_t * data;
+
+ /* Only announce the flow if our address is bigger */
+ if (ipcpi.dt_addr < conn.conn_info.addr)
+ return 0;
+
+ path[0] = '\0';
+ sprintf(fso_name, "%" PRIu64 "-%" PRIu64,
+ ipcpi.dt_addr, conn.conn_info.addr);
+ rib_path_append(rib_path_append(path, ROUTING_NAME), fso_name);
+
+ switch (event) {
+ case NEIGHBOR_ADDED:
+ fso.s_addr = ipcpi.dt_addr;
+ fso.d_addr = conn.conn_info.addr;
+
+ len = fso__get_packed_size(&fso);
+ if (len == 0)
+ return -1;
+
+ data = malloc(len);
+ if (data == NULL)
+ return -1;
+
+ fso__pack(&fso, data);
+
+ if (rib_add(ROUTING_PATH, fso_name)) {
+ log_err("Failed to add FSO.");
+ free(data);
+ return -1;
+ }
+
+ if (rib_put(path, data, len)) {
+ log_err("Failed to put FSO in RIB.");
+ rib_del(path);
+ free(data);
+ return -1;
+ }
+
+ log_dbg("Added %s to RIB.", path);
+
+ break;
+ case NEIGHBOR_REMOVED:
+ if (rib_del(path)) {
+ log_err("Failed to remove FSO.");
+ return -1;
+ }
+
+ log_dbg("Removed %s from RIB.", path);
+
+ break;
+ case NEIGHBOR_QOS_CHANGE:
+ log_info("Not currently supported.");
+ break;
+ default:
+ log_info("Unsupported event for routing.");
+ break;
+ }
+
+ return 0;
+}
+
+static int read_fso(char * path,
+ int32_t flag)
+{
+ ssize_t len;
+ uint8_t ro[BUF_SIZE];
+ fso_t * fso;
+ qosspec_t qs;
+
+ memset(&qs, 0, sizeof(qs));
+
+ len = rib_read(path, ro, BUF_SIZE);
+ if (len < 0) {
+ log_err("Failed to read FSO.");
+ return -1;
+ }
+
+ fso = fso__unpack(NULL, len, ro);
+ if (fso == NULL) {
+ log_err("Failed to unpack.");
+ return -1;
+ }
+
+ if (flag & RO_MODIFY) {
+ if (graph_update_edge(link_state.graph,
+ fso->s_addr, fso->d_addr, qs)) {
+ fso__free_unpacked(fso, NULL);
+ return -1;
+ }
+ } else if (flag & RO_DELETE) {
+ if (graph_del_edge(link_state.graph, fso->s_addr, fso->d_addr)) {
+ fso__free_unpacked(fso, NULL);
+ return -1;
+ }
+ }
+
+ fso__free_unpacked(fso, NULL);
+
+ return 0;
+}
+
+static void * rib_listener(void * o)
+{
+ int32_t flag;
+ char path[RIB_MAX_PATH_LEN + 1];
+ char ** children;
+ ssize_t len;
+ int i;
+
+ (void) o;
+
+ if (ro_set_add(link_state.set, ROUTING_PATH, RO_MODIFY | RO_DELETE)) {
+ log_err("Failed to add to RO set");
+ return (void * ) -1;
+ }
+
+ len = rib_children(ROUTING_PATH, &children);
+ if (len < 0) {
+ log_err("Failed to retrieve children.");
+ return (void *) -1;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (read_fso(children[i], RO_CREATE)) {
+ log_err("Failed to parse FSO.");
+ continue;
+ }
+ }
+
+ while (rib_event_wait(link_state.set, link_state.queue, NULL) == 0) {
+ path[0] = '\0';
+ flag = rqueue_next(link_state.queue, path);
+ if (flag < 0)
+ continue;
+
+ if (read_fso(path, flag)) {
+ log_err("Failed to parse FSO.");
+ continue;
+ }
+ }
+
+ return (void *) 0;
+}
+
+struct routing_i * link_state_routing_i_create(struct pff * pff)
+{
+ struct routing_i * tmp;
+
+ assert(pff);
+
+ tmp = malloc(sizeof(*tmp));
+ if (tmp == NULL)
+ return NULL;
+
+ tmp->pff = pff;
+
+ pthread_create(&tmp->calculator, NULL, calculate_pff, (void *) tmp);
+
+ return tmp;
+}
+
+void link_state_routing_i_destroy(struct routing_i * instance)
+{
+ assert(instance);
+
+ pthread_cancel(instance->calculator);
+
+ pthread_join(instance->calculator, NULL);
+
+ free(instance);
+}
+
+int link_state_init(struct nbs * nbs)
+{
+ link_state.graph = graph_create();
+ if (link_state.graph == NULL)
+ return -1;
+
+ if (rib_add(RIB_ROOT, ROUTING_NAME)) {
+ graph_destroy(link_state.graph);
+ return -1;
+ }
+
+ link_state.nbs = nbs;
+
+ link_state.nb_notifier.notify_call = link_state_neighbor_event;
+ if (nbs_reg_notifier(link_state.nbs, &link_state.nb_notifier)) {
+ graph_destroy(link_state.graph);
+ rib_del(ROUTING_PATH);
+ return -1;
+ }
+
+ link_state.set = ro_set_create();
+ if (link_state.set == NULL) {
+ nbs_unreg_notifier(link_state.nbs, &link_state.nb_notifier);
+ graph_destroy(link_state.graph);
+ rib_del(ROUTING_PATH);
+ return -1;
+ }
+
+ link_state.queue = rqueue_create();
+ if (link_state.queue == NULL) {
+ ro_set_destroy(link_state.set);
+ nbs_unreg_notifier(link_state.nbs, &link_state.nb_notifier);
+ graph_destroy(link_state.graph);
+ rib_del(ROUTING_PATH);
+ return -1;
+ }
+
+ pthread_create(&link_state.rib_listener, NULL, rib_listener, NULL);
+
+ return 0;
+}
+
+void link_state_fini(void)
+{
+ pthread_cancel(link_state.rib_listener);
+
+ pthread_join(link_state.rib_listener, NULL);
+
+ rqueue_destroy(link_state.queue);
+
+ ro_set_destroy(link_state.set);
+
+ graph_destroy(link_state.graph);
+
+ rib_del(ROUTING_PATH);
+
+ nbs_unreg_notifier(link_state.nbs, &link_state.nb_notifier);
+}
diff --git a/src/ipcpd/normal/pol/link_state.h b/src/ipcpd/normal/pol/link_state.h
new file mode 100644
index 00000000..e78d0543
--- /dev/null
+++ b/src/ipcpd/normal/pol/link_state.h
@@ -0,0 +1,43 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Link state routing policy
+ *
+ * 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.
+ */
+
+#ifndef OUROBOROS_IPCPD_NORMAL_POL_LINK_STATE_H
+#define OUROBOROS_IPCPD_NORMAL_POL_LINK_STATE_H
+
+#include "pol-routing-ops.h"
+
+int link_state_init(struct nbs * nbs);
+
+void link_state_fini(void);
+
+struct routing_i * link_state_routing_i_create(struct pff * pff);
+
+void link_state_routing_i_destroy(struct routing_i * instance);
+
+struct pol_routing_ops link_state_ops = {
+ .init = link_state_init,
+ .fini = link_state_fini,
+ .routing_i_create = link_state_routing_i_create,
+ .routing_i_destroy = link_state_routing_i_destroy
+};
+
+#endif /* OUROBOROS_IPCPD_NORMAL_POL_LINK_STATE_H */
diff --git a/src/ipcpd/normal/pol/tests/CMakeLists.txt b/src/ipcpd/normal/pol/tests/CMakeLists.txt
new file mode 100644
index 00000000..55ca425a
--- /dev/null
+++ b/src/ipcpd/normal/pol/tests/CMakeLists.txt
@@ -0,0 +1,34 @@
+get_filename_component(CURRENT_SOURCE_PARENT_DIR
+ ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(CURRENT_BINARY_PARENT_DIR
+ ${CMAKE_CURRENT_BINARY_DIR} DIRECTORY)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+include_directories(${CURRENT_SOURCE_PARENT_DIR})
+include_directories(${CURRENT_BINARY_PARENT_DIR})
+
+include_directories(${CMAKE_SOURCE_DIR}/include)
+include_directories(${CMAKE_BINARY_DIR}/include)
+
+get_filename_component(PARENT_PATH ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(PARENT_DIR ${PARENT_PATH} NAME)
+
+create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
+ # Add new tests here
+ graph_test.c
+ )
+
+add_executable(${PARENT_DIR}_test EXCLUDE_FROM_ALL ${${PARENT_DIR}_tests})
+target_link_libraries(${PARENT_DIR}_test ouroboros)
+
+add_dependencies(check ${PARENT_DIR}_test)
+
+set(tests_to_run ${${PARENT_DIR}_tests})
+remove(tests_to_run test_suite.c)
+
+foreach (test ${tests_to_run})
+ get_filename_component(test_name ${test} NAME_WE)
+ add_test(${test_name} ${C_TEST_PATH}/${PARENT_DIR}_test ${test_name})
+endforeach (test)
diff --git a/src/ipcpd/normal/pol/tests/graph_test.c b/src/ipcpd/normal/pol/tests/graph_test.c
new file mode 100644
index 00000000..3d433e34
--- /dev/null
+++ b/src/ipcpd/normal/pol/tests/graph_test.c
@@ -0,0 +1,240 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Test of the graph structure
+ *
+ * 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.
+ */
+
+#include <ouroboros/config.h>
+#include <ouroboros/utils.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "graph.c"
+
+struct graph * graph;
+struct routing_table ** table;
+ssize_t n_table;
+qosspec_t qs;
+
+int graph_test_entries(int entries)
+{
+ n_table = graph_routing_table(graph, 1, &table);
+
+ if (n_table != entries) {
+ printf("Wrong number of entries.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ freepp(struct routing_table, table, n_table);
+
+ return 0;
+}
+
+int graph_test_double_link(void)
+{
+ n_table = graph_routing_table(graph, 1, &table);
+ if (n_table < 0 || table == NULL) {
+ printf("Failed to get routing table.\n");
+ return -1;
+ }
+
+ if (n_table != 2) {
+ printf("Wrong number of entries.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if ((table[0]->dst != 2 && table[0]->nhop != 2) ||
+ (table[0]->dst != 3 && table[0]->nhop != 2)) {
+ printf("Wrong routing entry.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if ((table[1]->dst != 2 && table[1]->nhop != 2) ||
+ (table[0]->dst != 3 && table[0]->nhop != 2)) {
+ printf("Wrong routing entry.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ freepp(struct routing_table, table, n_table);
+
+ return 0;
+}
+
+int graph_test_single_link(void)
+{
+ n_table = graph_routing_table(graph, 1, &table);
+ if (n_table < 0 || table == NULL) {
+ printf("Failed to get routing table.\n");
+ return -1;
+ }
+
+ if (n_table != 1) {
+ printf("Wrong number of entries.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (table[0]->dst != 2 && table[0]->nhop != 2) {
+ printf("Wrong routing entry.\n");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ freepp(struct routing_table, table, n_table);
+
+ return 0;
+}
+
+int graph_test(int argc,
+ char ** argv)
+{
+ int i;
+ int nhop;
+ int dst;
+
+ (void) argc;
+ (void) argv;
+
+ memset(&qs, 0, sizeof(qs));
+
+ graph = graph_create();
+ if (graph == NULL) {
+ printf("Failed to create graph.\n");
+ return -1;
+ }
+
+ graph_destroy(graph);
+
+ graph = graph_create();
+ if (graph == NULL) {
+ printf("Failed to create graph.\n");
+ return -1;
+ }
+
+ if (graph_update_edge(graph, 1, 2, qs)) {
+ printf("Failed to add edge.\n");
+ graph_destroy(graph);
+ return -1;
+ }
+
+ if (graph_test_single_link()) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ if (graph_update_edge(graph, 2, 3, qs)) {
+ printf("Failed to add edge.\n");
+ graph_destroy(graph);
+ return -1;
+ }
+
+ if (graph_test_double_link()) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ if (graph_del_edge(graph, 2, 3)) {
+ printf("Failed to delete edge.\n");
+ graph_destroy(graph);
+ return -1;
+ }
+
+ if (graph_test_single_link()) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ graph_update_edge(graph, 2, 3, qs);
+ graph_update_edge(graph, 1, 3, qs);
+
+ if (graph_test_entries(2)) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ graph_update_edge(graph, 3, 4, qs);
+ graph_update_edge(graph, 4, 5, qs);
+
+ if (graph_test_entries(4)) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ graph_update_edge(graph, 2, 6, qs);
+ graph_update_edge(graph, 6, 7, qs);
+ graph_update_edge(graph, 3, 7, qs);
+
+ if (graph_test_entries(6)) {
+ graph_destroy(graph);
+ return -1;
+ }
+
+ n_table = graph_routing_table(graph, 1, &table);
+
+ for (i = 0; i < 6; i++) {
+ nhop = table[i]->nhop;
+ dst = table[i]->dst;
+
+ if (dst == 3 && nhop != 3) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (dst == 2 && nhop != 2) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (dst == 6 && nhop != 2) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (dst == 4 && nhop != 3) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (dst == 5 && nhop != 3) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+
+ if (dst == 7 && nhop != 3) {
+ printf("Wrong entry.");
+ freepp(struct routing_table, table, n_table);
+ return -1;
+ }
+ }
+
+ freepp(struct routing_table, table, n_table);
+
+ return 0;
+}