]> git.meshlink.io Git - meshlink/blobdiff - src/discovery.c
Monitor a PFROUTE socket on *BSD and macOS.
[meshlink] / src / discovery.c
index a64e9e2ebcf5434785c4a183c59be8c180dee6e7..8fa3aa3164a53b1f8f5a8807f572c3d9cffb802b 100644 (file)
@@ -9,7 +9,12 @@
 #include <catta/alternative.h>
 #include <catta/error.h>
 
+#if defined(__APPLE__) || defined(__unix) && !defined(__linux)
+#include <net/route.h>
+#endif
+
 #include "meshlink_internal.h"
+#include "event.h"
 #include "discovery.h"
 #include "sockaddr.h"
 #include "logger.h"
@@ -126,13 +131,13 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat
        case CATTA_SERVER_RUNNING:
                /* The serve has startup successfully and registered its host
                 * name on the network, so it's time to create our services */
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
 
                if(!mesh->catta_group) {
                        discovery_create_services(mesh);
                }
 
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
 
                break;
 
@@ -141,7 +146,7 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat
                char hostname[17];
                generate_rand_string(mesh, hostname, sizeof(hostname));
 
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
 
                assert(mesh->catta_server);
                assert(mesh->catta_poll);
@@ -152,12 +157,12 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat
                        catta_simple_poll_quit(mesh->catta_poll);
                }
 
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
        }
        break;
 
        case CATTA_SERVER_REGISTERING:
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
 
                /* Let's drop our registered services. When the server is back
                 * in CATTA_SERVER_RUNNING state we will register them
@@ -167,12 +172,12 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat
                        mesh->catta_group = NULL;
                }
 
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
 
                break;
 
        case CATTA_SERVER_FAILURE:
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
 
                assert(mesh->catta_server);
                assert(mesh->catta_poll);
@@ -180,7 +185,7 @@ static void discovery_server_callback(CattaServer *server, CattaServerState stat
                /* Terminate on failure */
                catta_simple_poll_quit(mesh->catta_poll);
 
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
                break;
 
        case CATTA_SERVER_INVALID:
@@ -215,7 +220,7 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI
                char *node_fp = (char *)catta_string_list_get_text(node_fp_li) + strlen(MESHLINK_MDNS_FINGERPRINT_KEY);
 
                if(node_name[0] == '=' && node_fp[0] == '=') {
-                       pthread_mutex_lock(&mesh->mutex);
+                       assert(pthread_mutex_lock(&mesh->mutex) == 0);
 
                        node_name += 1;
 
@@ -248,20 +253,22 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI
                                }
 
                                if(naddress.unknown.family != AF_UNKNOWN) {
-                                       meshlink_hint_address(mesh, (meshlink_node_t *)node, (struct sockaddr *)&naddress);
-
                                        node_t *n = (node_t *)node;
+                                       connection_t *c = n->connection;
 
-                                       if(n->connection && n->connection->outgoing) {
-                                               n->connection->outgoing->timeout = 0;
+                                       n->catta_address = naddress;
+                                       node_add_recent_address(mesh, n, &naddress);
 
-                                               if(n->connection->outgoing->ev.cb) {
-                                                       timeout_set(&mesh->loop, &n->connection->outgoing->ev, &(struct timeval) {
+                                       if(c && c->outgoing && !c->status.active) {
+                                               c->outgoing->timeout = 0;
+
+                                               if(c->outgoing->ev.cb) {
+                                                       timeout_set(&mesh->loop, &c->outgoing->ev, &(struct timespec) {
                                                                0, 0
                                                        });
                                                }
 
-                                               n->connection->last_ping_time = 0;
+                                               c->last_ping_time = -3600;
                                        }
 
                                } else {
@@ -271,7 +278,7 @@ static void discovery_resolve_callback(CattaSServiceResolver *resolver, CattaIfI
                                logger(mesh, MESHLINK_WARNING, "Node %s is not part of the mesh network.\n", node_name);
                        }
 
-                       pthread_mutex_unlock(&mesh->mutex);
+                       assert(pthread_mutex_unlock(&mesh->mutex) == 0);
                }
        }
 
@@ -286,22 +293,22 @@ static void discovery_browse_callback(CattaSServiceBrowser *browser, CattaIfInde
        /* Called whenever a new services becomes available on the LAN or is removed from the LAN */
        switch(event) {
        case CATTA_BROWSER_FAILURE:
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
                catta_simple_poll_quit(mesh->catta_poll);
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
                break;
 
        case CATTA_BROWSER_NEW:
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
                catta_s_service_resolver_new(mesh->catta_server, interface_, protocol, name, type, domain, CATTA_PROTO_UNSPEC, 0, discovery_resolve_callback, mesh);
                handle_network_change(mesh, ++mesh->catta_interfaces);
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
                break;
 
        case CATTA_BROWSER_REMOVE:
-               pthread_mutex_lock(&mesh->mutex);
+               assert(pthread_mutex_lock(&mesh->mutex) == 0);
                handle_network_change(mesh, --mesh->catta_interfaces);
-               pthread_mutex_unlock(&mesh->mutex);
+               assert(pthread_mutex_unlock(&mesh->mutex) == 0);
                break;
 
        case CATTA_BROWSER_ALL_FOR_NOW:
@@ -341,6 +348,8 @@ static void *discovery_loop(void *userdata) {
        meshlink_handle_t *mesh = userdata;
        assert(mesh);
 
+       assert(pthread_mutex_lock(&mesh->discovery_mutex) == 0);
+
        // handle catta logs
        catta_set_log_function(discovery_log_cb);
 
@@ -388,6 +397,7 @@ static void *discovery_loop(void *userdata) {
        config.publish_hinfo = 0;
        config.publish_addresses = 1;
        config.publish_no_reverse = 1;
+       config.allow_point_to_point = 1;
 
        /* Allocate a new server */
        int error;
@@ -396,7 +406,7 @@ static void *discovery_loop(void *userdata) {
        /* Free the configuration data */
        catta_server_config_free(&config);
 
-       /* Check wether creating the server object succeeded */
+       /* Check whether creating the server object succeeded */
        if(!mesh->catta_server) {
                logger(mesh, MESHLINK_ERROR, "Failed to create discovery server: %s\n", catta_strerror(error));
                goto fail;
@@ -412,9 +422,8 @@ static void *discovery_loop(void *userdata) {
 
 fail:
 
-       pthread_mutex_lock(&mesh->discovery_mutex);
-       pthread_cond_broadcast(&mesh->discovery_cond);
-       pthread_mutex_unlock(&mesh->discovery_mutex);
+       assert(pthread_cond_broadcast(&mesh->discovery_cond) == 0);
+       assert(pthread_mutex_unlock(&mesh->discovery_mutex) == 0);
 
        if(status) {
                catta_simple_poll_loop(mesh->catta_poll);
@@ -449,6 +458,53 @@ fail:
        return NULL;
 }
 
+#ifdef RTM_NEWADDR
+static void pfroute_io_handler(event_loop_t *loop, void *data, int flags) {
+       (void)flags;
+       static time_t prev_update;
+       meshlink_handle_t *mesh = data;
+
+       struct {
+               struct rt_msghdr rtm;
+               char data[2048];
+       } msg;
+
+       while(true) {
+               msg.rtm.rtm_version = 0;
+               ssize_t result = recv(mesh->pfroute_io.fd, &msg, sizeof(msg), MSG_DONTWAIT);
+
+               if(result <= 0) {
+                       if(result == 0 || errno == EAGAIN || errno == EINTR) {
+                               break;
+                       }
+
+                       logger(mesh, MESHLINK_ERROR, "Reading from PFROUTE socket failed: %s\n", strerror(errno));
+                       io_set(loop, &mesh->pfroute_io, 0);
+               }
+
+               if(msg.rtm.rtm_version != RTM_VERSION) {
+                       logger(mesh, MESHLINK_ERROR, "Invalid PFROUTE message version\n");
+                       break;
+               }
+
+               switch(msg.rtm.rtm_type) {
+               case RTM_IFINFO:
+               case RTM_NEWADDR:
+               case RTM_DELADDR:
+                       if(loop->now.tv_sec > prev_update + 5) {
+                               prev_update = loop->now.tv_sec;
+                               handle_network_change(mesh, 1);
+                       }
+
+                       break;
+
+               default:
+                       break;
+               }
+       }
+}
+#endif
+
 bool discovery_start(meshlink_handle_t *mesh) {
        logger(mesh, MESHLINK_DEBUG, "discovery_start called\n");
 
@@ -459,19 +515,32 @@ bool discovery_start(meshlink_handle_t *mesh) {
        assert(!mesh->discovery_threadstarted);
        assert(!mesh->catta_servicetype);
 
+       assert(pthread_mutex_lock(&mesh->discovery_mutex) == 0);
+
        // Start the discovery thread
        if(pthread_create(&mesh->discovery_thread, NULL, discovery_loop, mesh) != 0) {
+               assert(pthread_mutex_unlock(&mesh->discovery_mutex) == 0);
                logger(mesh, MESHLINK_ERROR, "Could not start discovery thread: %s\n", strerror(errno));
                memset(&mesh->discovery_thread, 0, sizeof(mesh)->discovery_thread);
                return false;
        }
 
-       pthread_mutex_lock(&mesh->discovery_mutex);
-       pthread_cond_wait(&mesh->discovery_cond, &mesh->discovery_mutex);
-       pthread_mutex_unlock(&mesh->discovery_mutex);
+       assert(pthread_cond_wait(&mesh->discovery_cond, &mesh->discovery_mutex) == 0);
+       assert(pthread_mutex_unlock(&mesh->discovery_mutex) == 0);
 
        mesh->discovery_threadstarted = true;
 
+#ifdef RTM_NEWADDR
+       int sock = socket(PF_ROUTE, SOCK_RAW, AF_UNSPEC);
+
+       if(sock != -1) {
+               io_add(&mesh->loop, &mesh->pfroute_io, pfroute_io_handler, mesh, sock, IO_READ);
+       } else {
+               logger(mesh, MESHLINK_WARNING, "Could not open PF_ROUTE socket: %s", strerror(errno));
+       }
+
+#endif
+
        return true;
 }
 
@@ -480,6 +549,15 @@ void discovery_stop(meshlink_handle_t *mesh) {
 
        assert(mesh);
 
+#ifdef RTM_NEWADDR
+
+       if(mesh->pfroute_io.cb) {
+               close(mesh->pfroute_io.fd);
+               io_del(&mesh->loop, &mesh->pfroute_io);
+       }
+
+#endif
+
        // Shut down
        if(mesh->catta_poll) {
                catta_simple_poll_quit(mesh->catta_poll);
@@ -487,7 +565,7 @@ void discovery_stop(meshlink_handle_t *mesh) {
 
        // Wait for the discovery thread to finish
        if(mesh->discovery_threadstarted == true) {
-               pthread_join(mesh->discovery_thread, NULL);
+               assert(pthread_join(mesh->discovery_thread, NULL) == 0);
                mesh->discovery_threadstarted = false;
        }