ipcpd: normal: Make routing a policy

This makes the routing component into a policy since different
approaches may exist to do this, depending on how high the rank of the
DIF is.

18 files changed, 522 insertions, 353 deletions

diff --git a/include/ouroboros/ipcp.h b/include/ouroboros/ipcp.h
index 05fdcd49..8979c6d1 100644
--- a/include/ouroboros/ipcp.h
+++ b/include/ouroboros/ipcp.h
@@ -48,6 +48,10 @@ enum pol_gam {
         COMPLETE = 0
 };
 
+enum pol_routing {
+        LINK_STATE = 0
+};
+
 enum hash_algo {
         HASH_CRC32 = 0,
         HASH_MD5,
@@ -77,6 +81,7 @@ struct ipcp_config {
         enum pol_addr_auth addr_auth_type;
         enum pol_gam       dt_gam_type;
         enum pol_gam       rm_gam_type;
+        enum pol_routing   routing_type;
 
         /* Shim UDP */
         uint32_t           ip_addr;
diff --git a/src/ipcpd/normal/CMakeLists.txt b/src/ipcpd/normal/CMakeLists.txt
index 984ebd3d..336b0e8f 100644
--- a/src/ipcpd/normal/CMakeLists.txt
+++ b/src/ipcpd/normal/CMakeLists.txt
@@ -15,7 +15,8 @@ include_directories(${CMAKE_BINARY_DIR}/include)
 set(IPCP_NORMAL_TARGET ipcpd-normal CACHE STRING "IPCP_NORMAL_TARGET")
 
 protobuf_generate_c(FLOW_ALLOC_SRCS FLOW_ALLOC_HDRS flow_alloc.proto)
-protobuf_generate_c(FSO_SRCS FSO_HDRS fso.proto)
+# Add GPB sources of policies last
+protobuf_generate_c(FSO_SRCS FSO_HDRS pol/fso.proto)
 
 set(SOURCE_FILES
   # Add source files here
@@ -27,7 +28,6 @@ set(SOURCE_FILES
   enroll.c
   fa.c
   gam.c
-  graph.c
   main.c
   neighbors.c
   pff.c
@@ -37,6 +37,8 @@ set(SOURCE_FILES
   # Add policies last
   pol/complete.c
   pol/flat.c
+  pol/link_state.c
+  pol/graph.c
   )
 
 add_executable(ipcpd-normal ${SOURCE_FILES} ${IPCP_SOURCES}
@@ -50,5 +52,4 @@ endif (CMAKE_BUILD_TYPE MATCHES Debug)
 
 install(TARGETS ipcpd-normal RUNTIME DESTINATION sbin)
 
-# Enable once ipcp-normal has tests
-add_subdirectory(tests)
+add_subdirectory(pol/tests)
diff --git a/src/ipcpd/normal/dt.c b/src/ipcpd/normal/dt.c
index 33070fa2..b22fb59c 100644
--- a/src/ipcpd/normal/dt.c
+++ b/src/ipcpd/normal/dt.c
@@ -143,6 +143,13 @@ int dt_init(void)
         int              i;
         int              j;
         struct conn_info info;
+        enum pol_routing pr;
+
+        if (rib_read(BOOT_PATH "/dt/routing/type", &pr, sizeof(pr))
+            != sizeof(pr)) {
+                log_err("Failed to read policy for routing.");
+                return -1;
+        }
 
         if (dt_pci_init()) {
                 log_err("Failed to init shm dt_pci.");
@@ -175,7 +182,7 @@ int dt_init(void)
                 goto fail_nbs;
         }
 
-        if (routing_init(dt.nbs)) {
+        if (routing_init(pr, dt.nbs)) {
                 log_err("Failed to init routing.");
                 goto fail_nbs_notifier;
         }
diff --git a/src/ipcpd/normal/main.c b/src/ipcpd/normal/main.c
index f9718041..0b8a26ab 100644
--- a/src/ipcpd/normal/main.c
+++ b/src/ipcpd/normal/main.c
@@ -88,7 +88,7 @@ static int boot_components(void)
 
         log_dbg("Starting components.");
 
-        if (rib_read(BOOT_PATH "/addr_auth/type", &pa, sizeof(pa))
+        if (rib_read(BOOT_PATH "/dt/addr_auth/type", &pa, sizeof(pa))
             != sizeof(pa)) {
                 log_err("Failed to read policy for address authority.");
                 goto fail_addr_auth;
@@ -261,17 +261,17 @@ const struct ros {
         {BOOT_PATH "/dt/const", "addr_size"},
         {BOOT_PATH "/dt/const", "fd_size"},
         {BOOT_PATH "/dt/const", "has_ttl"},
+        {BOOT_PATH "/dt", "addr_auth"},
+        {BOOT_PATH "/dt/addr_auth", "type"},
+        {BOOT_PATH "/dt", "routing"},
+        {BOOT_PATH "/dt/routing", "type"},
 
         /* RIB MGR COMPONENT */
         {BOOT_PATH, "rm"},
-
         {BOOT_PATH "/rm","gam"},
         {BOOT_PATH "/rm/gam", "type"},
         {BOOT_PATH "/rm/gam", "cacep"},
 
-        /* ADDR AUTH COMPONENT */
-        {BOOT_PATH, "addr_auth"},
-        {BOOT_PATH "/addr_auth", "type"},
         {NULL, NULL}
 };
 
@@ -327,9 +327,12 @@ static int normal_ipcp_bootstrap(const struct ipcp_config * conf)
             rib_write(BOOT_PATH "/rm/gam/type",
                       &conf->rm_gam_type,
                       sizeof(conf->rm_gam_type)) ||
-            rib_write(BOOT_PATH "/addr_auth/type",
+            rib_write(BOOT_PATH "/dt/addr_auth/type",
                       &conf->addr_auth_type,
-                      sizeof(conf->addr_auth_type))) {
+                      sizeof(conf->addr_auth_type)) ||
+            rib_write(BOOT_PATH "/dt/routing/type",
+                      &conf->routing_type,
+                      sizeof(conf->routing_type))) {
                 log_err("Failed to write boot info to RIB.");
                 return -1;
         }
diff --git a/src/ipcpd/normal/pol-routing-ops.h b/src/ipcpd/normal/pol-routing-ops.h
new file mode 100644
index 00000000..3a60ca6b
--- /dev/null
+++ b/src/ipcpd/normal/pol-routing-ops.h
@@ -0,0 +1,38 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Routing policy ops
+ *
+ *    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_ROUTING_OPS_H
+#define OUROBOROS_IPCPD_NORMAL_POL_ROUTING_OPS_H
+
+#include "pff.h"
+
+struct pol_routing_ops {
+        int                (* init)(struct nbs * nbs);
+
+        void               (* fini)(void);
+
+        struct routing_i * (* routing_i_create)(struct pff * pff);
+
+        void               (* routing_i_destroy)(struct routing_i * instance);
+};
+
+#endif /* OUROBOROS_IPCPD_NORMAL_POL_ROUTING_OPS_H */
diff --git a/src/ipcpd/normal/fso.proto b/src/ipcpd/normal/pol/fso.proto
index 32b281d6..32b281d6 100644
--- a/src/ipcpd/normal/fso.proto
+++ b/src/ipcpd/normal/pol/fso.proto
diff --git a/src/ipcpd/normal/graph.c b/src/ipcpd/normal/pol/graph.c
index 78ed203d..78ed203d 100644
--- a/src/ipcpd/normal/graph.c
+++ b/src/ipcpd/normal/pol/graph.c
diff --git a/src/ipcpd/normal/graph.h b/src/ipcpd/normal/pol/graph.h
index 44496bc3..44496bc3 100644
--- a/src/ipcpd/normal/graph.h
+++ b/src/ipcpd/normal/pol/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/tests/CMakeLists.txt b/src/ipcpd/normal/pol/tests/CMakeLists.txt
index 55ca425a..55ca425a 100644
--- a/src/ipcpd/normal/tests/CMakeLists.txt
+++ b/src/ipcpd/normal/pol/tests/CMakeLists.txt
diff --git a/src/ipcpd/normal/tests/graph_test.c b/src/ipcpd/normal/pol/tests/graph_test.c
index 3d433e34..3d433e34 100644
--- a/src/ipcpd/normal/tests/graph_test.c
+++ b/src/ipcpd/normal/pol/tests/graph_test.c
diff --git a/src/ipcpd/normal/ribconfig.h b/src/ipcpd/normal/ribconfig.h
index 2f5daf72..31c79fbe 100644
--- a/src/ipcpd/normal/ribconfig.h
+++ b/src/ipcpd/normal/ribconfig.h
@@ -26,14 +26,14 @@
 /* RIB configuration for normal */
 #define RIB_MAX_PATH_LEN 256
 
-#define DLR              "/"
-#define BOOT_NAME        "boot"
-#define MEMBERS_NAME     "members"
-#define DIR_NAME         "directory"
-#define ROUTING_NAME     "fsdb"
-#define DIR_PATH         DLR DIR_NAME
-#define BOOT_PATH        DLR BOOT_NAME
-#define MEMBERS_PATH     DLR MEMBERS_NAME
-#define ROUTING_PATH     DLR ROUTING_NAME
+#define DLR          "/"
+#define BOOT_NAME    "boot"
+#define MEMBERS_NAME "members"
+#define DIR_NAME     "directory"
+#define ROUTING_NAME "fsdb"
+#define DIR_PATH     DLR DIR_NAME
+#define BOOT_PATH    DLR BOOT_NAME
+#define MEMBERS_PATH DLR MEMBERS_NAME
+#define ROUTING_PATH DLR ROUTING_NAME
 
 #endif /* OUROBOROS_IPCPD_NORMAL_RIB_CONFIG_H */
diff --git a/src/ipcpd/normal/routing.c b/src/ipcpd/normal/routing.c
index cc6cdca8..e1459c15 100644
--- a/src/ipcpd/normal/routing.c
+++ b/src/ipcpd/normal/routing.c
@@ -23,338 +23,41 @@
 #define OUROBOROS_PREFIX "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 <ouroboros/utils.h>
 
 #include "routing.h"
-#include "ribmgr.h"
-#include "ribconfig.h"
-#include "ipcp.h"
-#include "graph.h"
-#include "neighbors.h"
-
-#include <assert.h>
-#include <stdlib.h>
-#include <inttypes.h>
-#include <string.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;
-};
+#include "pol/link_state.h"
 
 struct {
-        struct nbs *       nbs;
-        struct nb_notifier nb_notifier;
-
-        struct graph *     graph;
-
-        ro_set_t *         set;
-        rqueue_t *         queue;
-        pthread_t          rib_listener;
+        struct pol_routing_ops * ops;
 } routing;
 
-/* Take under neighbors lock */
-static int addr_to_fd(uint64_t addr)
-{
-        struct list_head * p = NULL;
-
-        list_for_each(p, &routing.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(routing.graph,
-                                              ipcpi.dt_addr, &table);
-                if (n_table < 0) {
-                        sleep(RECALC_TIME);
-                        continue;
-                }
-
-                pthread_mutex_lock(&routing.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(&routing.nbs->list_lock);
-
-                freepp(struct routing_table, table, n_table);
-                sleep(RECALC_TIME);
-        }
-
-        return (void *) 0;
-}
-
-struct routing_i * 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 routing_i_destroy(struct routing_i * instance)
-{
-        assert(instance);
-
-        pthread_cancel(instance->calculator);
-
-        pthread_join(instance->calculator, NULL);
-
-        free(instance);
-}
-
-static int routing_neighbor_event(enum nb_event event,
-                                  struct conn   conn)
+int routing_init(enum pol_routing pr,
+                 struct nbs *     nbs)
 {
-        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.");
+        switch (pr) {
+        case LINK_STATE:
+                routing.ops = &link_state_ops;
                 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.");
+                log_err("Unknown routing type.");
                 return -1;
         }
 
-        if (flag & RO_MODIFY) {
-                if (graph_update_edge(routing.graph,
-                                      fso->s_addr, fso->d_addr, qs)) {
-                        fso__free_unpacked(fso, NULL);
-                        return -1;
-                }
-        } else if (flag & RO_DELETE) {
-                if (graph_del_edge(routing.graph, fso->s_addr, fso->d_addr)) {
-                        fso__free_unpacked(fso, NULL);
-                        return -1;
-                }
-        }
-
-        fso__free_unpacked(fso, NULL);
-
-        return 0;
+        return routing.ops->init(nbs);
 }
 
-static void * rib_listener(void * o)
+struct routing_i * routing_i_create(struct pff * pff)
 {
-        int32_t flag;
-        char    path[RIB_MAX_PATH_LEN + 1];
-        char ** children;
-        ssize_t len;
-        int     i;
-
-        (void) o;
-
-        if (ro_set_add(routing.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(routing.set, routing.queue, NULL) == 0) {
-                path[0] = '\0';
-                flag = rqueue_next(routing.queue, path);
-                if (flag < 0)
-                        continue;
-
-                if (read_fso(path, flag)) {
-                        log_err("Failed to parse FSO.");
-                        continue;
-                }
-        }
-
-        return (void *) 0;
+        return routing.ops->routing_i_create(pff);
 }
 
-int routing_init(struct nbs * nbs)
+void routing_i_destroy(struct routing_i * instance)
 {
-        routing.graph = graph_create();
-        if (routing.graph == NULL)
-                return -1;
-
-        if (rib_add(RIB_ROOT, ROUTING_NAME)) {
-                graph_destroy(routing.graph);
-                return -1;
-        }
-
-        routing.nbs = nbs;
-
-        routing.nb_notifier.notify_call = routing_neighbor_event;
-        if (nbs_reg_notifier(routing.nbs, &routing.nb_notifier)) {
-                graph_destroy(routing.graph);
-                rib_del(ROUTING_PATH);
-                return -1;
-        }
-
-        routing.set = ro_set_create();
-        if (routing.set == NULL) {
-                nbs_unreg_notifier(routing.nbs, &routing.nb_notifier);
-                graph_destroy(routing.graph);
-                rib_del(ROUTING_PATH);
-                return -1;
-        }
-
-        routing.queue = rqueue_create();
-        if (routing.queue == NULL) {
-                ro_set_destroy(routing.set);
-                nbs_unreg_notifier(routing.nbs, &routing.nb_notifier);
-                graph_destroy(routing.graph);
-                rib_del(ROUTING_PATH);
-                return -1;
-        }
-
-        pthread_create(&routing.rib_listener, NULL, rib_listener, NULL);
-
-        return 0;
+        return routing.ops->routing_i_destroy(instance);
 }
 
 void routing_fini(void)
 {
-        pthread_cancel(routing.rib_listener);
-
-        pthread_join(routing.rib_listener, NULL);
-
-        rqueue_destroy(routing.queue);
-
-        ro_set_destroy(routing.set);
-
-        graph_destroy(routing.graph);
-
-        rib_del(ROUTING_PATH);
-
-        nbs_unreg_notifier(routing.nbs, &routing.nb_notifier);
+        routing.ops->fini();
 }
diff --git a/src/ipcpd/normal/routing.h b/src/ipcpd/normal/routing.h
index 0794ef28..7e47a425 100644
--- a/src/ipcpd/normal/routing.h
+++ b/src/ipcpd/normal/routing.h
@@ -23,6 +23,7 @@
 #ifndef OUROBOROS_IPCPD_NORMAL_ROUTING_H
 #define OUROBOROS_IPCPD_NORMAL_ROUTING_H
 
+#include <ouroboros/ipcp.h>
 #include <ouroboros/qos.h>
 
 #include "pff.h"
@@ -30,11 +31,8 @@
 
 #include <stdint.h>
 
-/*
- * Routing will take a type in the future,
- * to allow different policies.
- */
-int                routing_init(struct nbs * nbs);
+int                routing_init(enum pol_routing pr,
+                                struct nbs *     nbs);
 
 void               routing_fini(void);
 
diff --git a/src/lib/ipcp_config.proto b/src/lib/ipcp_config.proto
index b6c8c303..25516c2c 100644
--- a/src/lib/ipcp_config.proto
+++ b/src/lib/ipcp_config.proto
@@ -38,9 +38,10 @@ message ipcp_config_msg {
         optional uint32 addr_auth_type =  6;
         optional uint32 dt_gam_type    =  7;
         optional uint32 rm_gam_type    =  8;
+        optional uint32 routing_type   =  9;
         // Config for shim UDP
-        optional uint32 ip_addr        =  9;
-        optional uint32 dns_addr       = 10;
+        optional uint32 ip_addr        = 10;
+        optional uint32 dns_addr       = 11;
         // Config for the shim Ethernet LLC
-        optional string if_name        = 11;
+        optional string if_name        = 12;
 }
diff --git a/src/lib/irm.c b/src/lib/irm.c
index d2f85bbf..68202ad9 100644
--- a/src/lib/irm.c
+++ b/src/lib/irm.c
@@ -126,6 +126,8 @@ int irm_bootstrap_ipcp(pid_t                      api,
                 config.dt_gam_type        = conf->dt_gam_type;
                 config.has_rm_gam_type    = true;
                 config.rm_gam_type        = conf->rm_gam_type;
+                config.has_routing_type   = true;
+                config.routing_type       = conf->routing_type;
                 break;
         case IPCP_SHIM_UDP:
                 config.has_ip_addr  = true;
diff --git a/src/tools/irm/irm_ipcp_bootstrap.c b/src/tools/irm/irm_ipcp_bootstrap.c
index 44fdfb3d..6457a983 100644
--- a/src/tools/irm/irm_ipcp_bootstrap.c
+++ b/src/tools/irm/irm_ipcp_bootstrap.c
@@ -46,18 +46,19 @@
 #define SHA3_384          "SHA3_384"
 #define SHA3_512          "SHA3_512"
 
-#define DEFAULT_HASH_ALGO HASH_SHA3_256
-#define DEFAULT_HASH_STR  SHA3_256
-#define DEFAULT_ADDR_SIZE 4
-#define DEFAULT_FD_SIZE   2
-#define DEFAULT_DDNS      0
-#define DEFAULT_ADDR_AUTH FLAT_RANDOM
-#define DEFAULT_DT_GAM    COMPLETE
-#define DEFAULT_RM_GAM    COMPLETE
-#define ADDR_AUTH_FLAT    "flat"
-
-#define DT_GAM_COMPLETE   "complete"
-#define RM_GAM_COMPLETE   "complete"
+#define DEFAULT_HASH_ALGO  HASH_SHA3_256
+#define DEFAULT_HASH_STR   SHA3_256
+#define DEFAULT_ADDR_SIZE  4
+#define DEFAULT_FD_SIZE    2
+#define DEFAULT_DDNS       0
+#define DEFAULT_ADDR_AUTH  FLAT_RANDOM
+#define DEFAULT_DT_GAM     COMPLETE
+#define DEFAULT_RM_GAM     COMPLETE
+#define DEFAULT_ROUTING    LINK_STATE
+#define ADDR_AUTH_FLAT     "flat"
+#define DT_GAM_COMPLETE    "complete"
+#define RM_GAM_COMPLETE    "complete"
+#define ROUTING_LINK_STATE "link_state"
 
 static void usage(void)
 {
@@ -80,6 +81,7 @@ static void usage(void)
                " (default: %s)]\n"
                "                [rm_gam <rib manager graph adjacency manager>"
                " (default: %s)]\n"
+               "                [routing <routing policy> (default: %s)]\n"
                "if TYPE == " SHIM_UDP "\n"
                "                ip <IP address in dotted notation>\n"
                "                [dns <DDNS IP address in dotted notation>"
@@ -87,7 +89,8 @@ static void usage(void)
                "if TYPE == " SHIM_ETH_LLC "\n"
                "                if_name <interface name>\n",
                DEFAULT_HASH_STR, DEFAULT_ADDR_SIZE, DEFAULT_FD_SIZE,
-               ADDR_AUTH_FLAT, DT_GAM_COMPLETE, RM_GAM_COMPLETE, DEFAULT_DDNS);
+               ADDR_AUTH_FLAT, DT_GAM_COMPLETE, RM_GAM_COMPLETE,
+               ROUTING_LINK_STATE, DEFAULT_DDNS);
 }
 
 int do_bootstrap_ipcp(int argc, char ** argv)
@@ -102,6 +105,7 @@ int do_bootstrap_ipcp(int argc, char ** argv)
         enum pol_addr_auth addr_auth_type = DEFAULT_ADDR_AUTH;
         enum pol_gam       dt_gam_type    = DEFAULT_DT_GAM;
         enum pol_gam       rm_gam_type    = DEFAULT_RM_GAM;
+        enum pol_routing   routing_type   = DEFAULT_ROUTING;
         uint32_t           ip_addr        = 0;
         uint32_t           dns_addr       = DEFAULT_DDNS;
         char *             ipcp_type      = NULL;
@@ -149,6 +153,9 @@ int do_bootstrap_ipcp(int argc, char ** argv)
                 } else if (matches(*argv, "rm_gam") == 0) {
                         if (strcmp(RM_GAM_COMPLETE, *(argv + 1)) == 0)
                                 rm_gam_type = COMPLETE;
+                } else if (matches(*argv, "routing") == 0) {
+                        if (strcmp(ROUTING_LINK_STATE, *(argv + 1)) == 0)
+                                routing_type = LINK_STATE;
                 } else {
                         printf("\"%s\" is unknown, try \"irm "
                                "ipcp bootstrap\".\n", *argv);
@@ -191,6 +198,7 @@ int do_bootstrap_ipcp(int argc, char ** argv)
                 conf.addr_auth_type = addr_auth_type;
                 conf.dt_gam_type = dt_gam_type;
                 conf.rm_gam_type = rm_gam_type;
+                conf.routing_type = routing_type;
         } else if (strcmp(ipcp_type, SHIM_UDP) == 0) {
                 conf.type = IPCP_SHIM_UDP;
                 if (ip_addr == 0) {