+ return NULL;
+ }
+
+ node_t *n = (node_t *)node;
+ bool reachable;
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ reachable = n->status.reachable && !n->status.blacklisted;
+
+ if(last_reachable) {
+ *last_reachable = n->last_reachable;
+ }
+
+ if(last_unreachable) {
+ *last_unreachable = n->last_unreachable;
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return reachable;
+}
+
+bool meshlink_sign(meshlink_handle_t *mesh, const void *data, size_t len, void *signature, size_t *siglen) {
+ if(!mesh || !data || !len || !signature || !siglen) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(*siglen < MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ if(!ecdsa_sign(mesh->private_key, data, len, signature)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ pthread_mutex_unlock(&mesh->mutex);
+ return false;
+ }
+
+ *siglen = MESHLINK_SIGLEN;
+ pthread_mutex_unlock(&mesh->mutex);
+ return true;
+}
+
+bool meshlink_verify(meshlink_handle_t *mesh, meshlink_node_t *source, const void *data, size_t len, const void *signature, size_t siglen) {
+ if(!mesh || !source || !data || !len || !signature) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(siglen != MESHLINK_SIGLEN) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ bool rval = false;
+
+ struct node_t *n = (struct node_t *)source;
+
+ if(!node_read_public_key(mesh, n)) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ rval = false;
+ } else {
+ rval = ecdsa_verify(((struct node_t *)source)->ecdsa, data, len, signature);
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+ return rval;
+}
+
+static bool refresh_invitation_key(meshlink_handle_t *mesh) {
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ size_t count = invitation_purge_old(mesh, time(NULL) - mesh->invitation_timeout);
+
+ if(!count) {
+ // TODO: Update invitation key if necessary?
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return mesh->invitation_key;
+}
+
+bool meshlink_set_canonical_address(meshlink_handle_t *mesh, meshlink_node_t *node, const char *address, const char *port) {
+ if(!mesh || !node || !address) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(!is_valid_hostname(address)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if((node_t *)node != mesh->self && !port) {
+ logger(mesh, MESHLINK_DEBUG, "Missing port number!");
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+
+ }
+
+ if(port && !is_valid_port(port)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ char *canonical_address;
+
+ xasprintf(&canonical_address, "%s %s", address, port ? port : mesh->myport);
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ node_t *n = (node_t *)node;
+ free(n->canonical_address);
+ n->canonical_address = canonical_address;
+
+ if(!node_write_config(mesh, n)) {
+ pthread_mutex_unlock(&mesh->mutex);
+ return false;
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return config_sync(mesh, "current");
+}
+
+bool meshlink_clear_canonical_address(meshlink_handle_t *mesh, meshlink_node_t *node) {
+ if(!mesh || !node) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ node_t *n = (node_t *)node;
+ free(n->canonical_address);
+ n->canonical_address = NULL;
+
+ if(!node_write_config(mesh, n)) {
+ pthread_mutex_unlock(&mesh->mutex);
+ return false;
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return config_sync(mesh, "current");
+}
+
+bool meshlink_add_invitation_address(struct meshlink_handle *mesh, const char *address, const char *port) {
+ if(!mesh || !address) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(!is_valid_hostname(address)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in address: %s\n", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ if(port && !is_valid_port(port)) {
+ logger(mesh, MESHLINK_DEBUG, "Invalid character in port: %s\n", address);
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ char *combo;
+
+ if(port) {
+ xasprintf(&combo, "%s/%s", address, port);
+ } else {
+ combo = xstrdup(address);
+ }
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ if(!mesh->invitation_addresses) {
+ mesh->invitation_addresses = list_alloc((list_action_t)free);
+ }
+
+ list_insert_tail(mesh->invitation_addresses, combo);
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return true;
+}
+
+void meshlink_clear_invitation_addresses(struct meshlink_handle *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return;
+ }
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ if(mesh->invitation_addresses) {
+ list_delete_list(mesh->invitation_addresses);
+ mesh->invitation_addresses = NULL;
+ }
+
+ pthread_mutex_unlock(&mesh->mutex);
+}
+
+bool meshlink_add_address(meshlink_handle_t *mesh, const char *address) {
+ return meshlink_set_canonical_address(mesh, (meshlink_node_t *)mesh->self, address, NULL);
+}
+
+bool meshlink_add_external_address(meshlink_handle_t *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;
+ }
+
+ char *address = meshlink_get_external_address(mesh);
+
+ if(!address) {
+ return false;
+ }
+
+ bool rval = meshlink_set_canonical_address(mesh, (meshlink_node_t *)mesh->self, address, NULL);
+ free(address);
+
+ return rval;
+}
+
+int meshlink_get_port(meshlink_handle_t *mesh) {
+ if(!mesh) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return -1;
+ }
+
+ if(!mesh->myport) {
+ meshlink_errno = MESHLINK_EINTERNAL;
+ return -1;
+ }
+
+ int port;
+
+ if(pthread_mutex_lock(&mesh->mutex) != 0) {
+ abort();
+ }
+
+ port = atoi(mesh->myport);
+ pthread_mutex_unlock(&mesh->mutex);
+
+ return port;
+}
+
+bool meshlink_set_port(meshlink_handle_t *mesh, int port) {
+ if(!mesh || port < 0 || port >= 65536 || mesh->threadstarted) {
+ meshlink_errno = MESHLINK_EINVAL;
+ return false;