static void dslink_map_entry_clear(Map *map) { for (MapEntry *entry = (MapEntry *) map->list.head.next; (void *) entry != &map->list.head;) { MapEntry *tmp = entry->next; dslink_decref(entry->key); dslink_decref(entry->value); dslink_free(entry->node); dslink_free(entry); entry = tmp; } }
ref_t *dslink_map_removel_get(Map *map, void *key, size_t len) { if (!map || map->locked) { return NULL; } size_t index = dslink_map_index_of_key(map, key, len); for (MapNode *node = map->table[index]; node != NULL; node = node->next) { if (map->cmp(node->entry->key->data, key, len) != 0) { continue; } if (node->prev == NULL) { if (node->next) { MapNode *tmp = node->next; tmp->prev = NULL; map->table[index] = tmp; } else { map->table[index] = NULL; } } else { node->prev->next = node->next; if (node->next) { node->next->prev = node->prev; } } ref_t *ref = node->entry->value; dslink_decref(node->entry->key); list_free_node(node->entry); dslink_free(node); map->size--; return ref; } return NULL; }
void dslink_map_removel(Map *map, void *key, size_t len) { if (!map || map->locked) { return; } ref_t *ref = dslink_map_removel_get(map, key, len); if (ref) { dslink_decref(ref); } }
int dslink_map_set(Map *map, ref_t *key, ref_t *value) { if (!(key && value)) { return 1; } int ret; const float loadFactor = (float) map->size / map->capacity; if (loadFactor >= map->max_load_factor) { if ((ret = dslink_map_rehash_table(map)) != 0) { return ret; } } MapNode *node = NULL; if ((ret = dslink_map_get_raw_node(map, &node, key)) != 0) { if (ret == DSLINK_ALLOC_ERR) { return ret; } } dslink_decref(node->entry->value); node->entry->value = value; return 0; }
int broker_msg_handle_invoke(RemoteDSLink *link, json_t *req) { json_t *reqRid = json_object_get(req, "rid"); json_t *reqPath = json_object_get(req, "path"); if (!(reqRid && reqPath)) { return 1; } json_t *maxPermitJson = json_object_get(req, "permit"); PermissionLevel maxPermit = PERMISSION_CONFIG; if (json_is_string(maxPermitJson)) { maxPermit = permission_str_level(json_string_value(maxPermitJson)); } const char *path = json_string_value(reqPath); char *out = NULL; BrokerNode *node = broker_node_get(link->broker->root, path, &out); if (!node) { broker_utils_send_closed_resp(link, req, "disconnected"); return 0; } Broker *broker = mainLoop->data; PermissionLevel permissionOnPath = get_permission(path, broker->root, link); if (permissionOnPath > maxPermit) { permissionOnPath = maxPermit; } if (permissionOnPath == PERMISSION_NONE) { broker_utils_send_closed_resp(link, req, "permissionDenied"); return 0; } if (node->type == REGULAR_NODE) { json_t *invokableJson = json_object_get(node->meta, "$invokable"); PermissionLevel level = permission_str_level(json_string_value(invokableJson)); if (level > permissionOnPath) { broker_utils_send_closed_resp(link, req, "permissionDenied"); } else if (node->on_invoke) { node->on_invoke(link, node, req, maxPermit); } return 0; } else if (node->type != DOWNSTREAM_NODE) { // Unknown node type broker_utils_send_closed_resp(link, req, "disconnected"); return 0; } DownstreamNode *ds = (DownstreamNode *) node; uint32_t rid = broker_node_incr_rid(ds); if (!ds->link) { broker_utils_send_closed_resp(link, req, "disconnected"); return 0; } BrokerInvokeStream *s = broker_stream_invoke_init(); s->responder_rid = rid; s->responder = ds->link; s->resp_close_cb = remote_invoke_resp_disconnected; s->requester_rid = (uint32_t) json_integer_value(reqRid); s->requester = link; s->req_close_cb = remote_invoke_req_closed; ref_t *refStream = dslink_ref(s, NULL); dslink_map_set(&ds->link->responder_streams, dslink_int_ref(rid), refStream); ref_t *findref = dslink_map_remove_get(&link->requester_streams, &s->requester_rid); if (findref) { BrokerStream *oldstream = findref->data; if (oldstream->req_close_cb) { oldstream->req_close_cb(oldstream, link); } broker_stream_free(oldstream); dslink_decref(findref); } dslink_map_set(&link->requester_streams, dslink_int_ref(s->requester_rid), dslink_incref(refStream)); send_invoke_request(ds, req, rid, out, permissionOnPath); return 0; }
static int dslink_map_get_raw_node(Map *map, MapNode **node, ref_t *key) { int ret = 0; size_t len = map->key_len_calc(key->data); size_t index = dslink_map_index_of_key(map, key->data, len); *node = map->table[index]; if (!(*node)) { *node = map->table[index] = dslink_malloc(sizeof(MapNode)); if (*node) { (*node)->entry = dslink_malloc(sizeof(MapEntry)); if (!(*node)->entry) { map->table[index] = NULL; dslink_free(*node); *node = NULL; goto exit; } (*node)->entry->node = *node; (*node)->entry->key = key; (*node)->entry->value = NULL; (*node)->next = NULL; (*node)->prev = NULL; } } else { while (1) { if (map->cmp((*node)->entry->key->data, key->data, len) == 0) { dslink_decref((*node)->entry->key); (*node)->entry->key = key; return 1; } MapNode *tmp = (*node)->next; if (tmp == NULL) { tmp = dslink_malloc(sizeof(MapNode)); if (!tmp) { *node = NULL; break; } tmp->entry = dslink_malloc(sizeof(MapEntry)); if (!tmp->entry) { dslink_free(*node); *node = NULL; break; } tmp->entry->key = key; tmp->entry->value = NULL; tmp->entry->node = tmp; tmp->next = NULL; tmp->prev = *node; (*node)->next = tmp; *node = tmp; break; } *node = tmp; } } exit: if (!(*node)) { return DSLINK_ALLOC_ERR; } map->size++; list_insert_node(&map->list, (*node)->entry); return ret; }
int dslink_request_handle(DSLink *link, json_t *req) { const char *method = json_string_value(json_object_get(req, "method")); if (!method) { return 1; } if (strcmp(method, "list") == 0) { const char *path = json_string_value(json_object_get(req, "path")); DSNode *node = dslink_node_get_path(link->responder->super_root, path); return dslink_response_list(link, req, node); } else if (strcmp(method, "subscribe") == 0) { json_t *paths = json_object_get(req, "paths"); json_t *rid = json_object_get(req, "rid"); return dslink_response_sub(link, paths, rid); } else if (strcmp(method, "unsubscribe") == 0) { json_t *sids = json_object_get(req, "sids"); json_t *rid = json_object_get(req, "rid"); return dslink_response_unsub(link, sids, rid); } else if (strcmp(method, "invoke") == 0) { const char *path = json_string_value(json_object_get(req, "path")); DSNode *node = dslink_node_get_path(link->responder->super_root, path); if (node && node->on_invocation) { Stream *stream = dslink_malloc(sizeof(Stream)); if (!stream) { return 1; } stream->type = INVOCATION_STREAM; stream->path = dslink_strdup(node->path); ref_t *stream_ref = dslink_ref(stream, free_stream); json_t *jsonRid = json_object_get(req, "rid"); json_t *params = json_object_get(req, "params"); node->on_invocation(link, node, jsonRid, params, stream_ref); if (stream->unused != 1) { dslink_decref(stream_ref); } else { ref_t *rid = dslink_ref(dslink_malloc(sizeof(uint32_t)), dslink_free); { uint32_t r = (uint32_t) json_integer_value(jsonRid); *((uint32_t *) rid->data) = r; } if (dslink_map_set(link->responder->open_streams, rid, stream_ref) != 0) { dslink_free(rid); dslink_free(stream_ref); free_stream(stream); return 1; } } } } else if (strcmp(method, "set") == 0) { const char *path = json_string_value(json_object_get(req, "path")); json_t *value = json_object_get(req, "value"); DSNode *node = dslink_node_get_path(link->responder->super_root, path); if (node) { ref_t *writable_ref = dslink_map_get(node->meta_data, "$writable"); if (writable_ref && json_is_string((json_t*) writable_ref->data)) { if (node->on_value_set) { node->on_value_set(link, node, value); } else { dslink_node_update_value(link, node, value); } } } } else if (strcmp(method, "close") == 0) { json_t *rid = json_object_get(req, "rid"); uint32_t ridi = (uint32_t) json_integer_value(rid); ref_t *stream_ref = dslink_map_remove_get(link->responder->open_streams, &ridi); if (stream_ref) { Stream *stream = stream_ref->data; DSNode *node = NULL; if (stream->path) { node = dslink_node_get_path(link->responder->super_root, stream->path); } if (stream->on_close != NULL) { stream->on_close(link, node, stream); } if (stream->type == LIST_STREAM) { dslink_map_remove(link->responder->list_subs, (void *) stream->path); } dslink_decref(stream_ref); } } else { log_warn("Unrecognized method: %s\n", method); } return 0; }
json_t *broker_handshake_handle_conn(Broker *broker, const char *dsId, const char *token, json_t *handshake) { if (dslink_map_contains(&broker->client_connecting, (void *) dsId)) { ref_t *ref = dslink_map_remove_get(&broker->client_connecting, (void *) dsId); RemoteDSLink *link = ref->data; dslink_map_remove(&broker->client_connecting, (void *) link->name); broker_remote_dslink_free(link); dslink_free(link); dslink_decref(ref); } RemoteDSLink *link = dslink_calloc(1, sizeof(RemoteDSLink)); json_t *resp = json_object(); if (!(link && resp)) { goto fail; } if (broker_remote_dslink_init(link) != 0) { goto fail; } link->broker = broker; link->auth = dslink_calloc(1, sizeof(RemoteAuth)); if (!link->auth) { goto fail; } if (dslink_handshake_generate_key_pair(&link->auth->tempKey) != 0) { log_err("Failed to create temporary key for DSLink\n"); goto fail; } { json_t *jsonPubKey = json_object_get(handshake, "publicKey"); if (!jsonPubKey) { goto fail; } const char *tmp = json_string_value(jsonPubKey); if (!tmp) { goto fail; } tmp = dslink_strdup(tmp); if (!tmp) { goto fail; } link->auth->pubKey = tmp; } char tempKey[90]; size_t tempKeyLen = 0; if (dslink_handshake_encode_pub_key(&link->auth->tempKey, tempKey, sizeof(tempKey), &tempKeyLen) != 0) { goto fail; } if (generate_salt((unsigned char *) link->auth->salt, sizeof(link->auth->salt)) != 0) { goto fail; } json_object_set_new_nocheck(resp, "wsUri", json_string_nocheck("/ws")); json_object_set_new_nocheck(resp, "tempKey", json_string_nocheck(tempKey)); json_object_set_new_nocheck(resp, "salt", json_string_nocheck(link->auth->salt)); if (json_boolean_value(json_object_get(handshake, "isResponder"))) { link->isResponder = 1; } if (json_boolean_value(json_object_get(handshake, "isRequester"))) { link->isRequester = 1; } json_t *linkData = json_object_get(handshake, "linkData"); if (json_is_object(linkData)) { json_incref(linkData); link->linkData = linkData; } { char buf[512] = {0}; snprintf(buf, sizeof(buf), "/downstream/"); char *name = buf + sizeof("/downstream/")-1; size_t dsIdLen = strlen(dsId); if (dsIdLen < 44) { goto fail; } size_t nameLen = dsIdLen - 43; if (dsId[nameLen - 1] == '-') { nameLen--; } int nodeExists = 0; // find a valid name from broker->client_names memcpy(name, dsId, nameLen); while (1) { ref_t *ref = dslink_map_get(&broker->client_connecting, name); if (ref) { RemoteDSLink *l = ref->data; if (l && l->dsId && strcmp(l->dsId->data, dsId) == 0) { dslink_map_remove(&broker->client_connecting, name); broker_remote_dslink_free(l); break; } else { name[nameLen] = dsId[nameLen]; nameLen++; } } ref = dslink_map_get(broker->downstream->children, (void *) name); if (ref == NULL) { break; } if (!((DownstreamNode *) ref->data)->dsId || strcmp(dsId, ((DownstreamNode *) ref->data)->dsId->data) == 0) { nodeExists = 1; break; } name[nameLen] = dsId[nameLen]; nameLen++; } if (!nodeExists && broker_enable_token) { if (!token) { log_err("Failed to connet, need token\n"); goto fail; } BrokerNode* tokenNode = get_token_node(token, dsId); if (tokenNode) { DownstreamNode *node = broker_init_downstream_node(broker->downstream, name); if (json_is_true(json_object_get(node->meta, "$$managed"))) { json_object_set_new_nocheck(node->meta, "$$token", json_string_nocheck(tokenNode->name)); } node->dsId = dslink_str_ref(dsId); if (broker->downstream->list_stream) { update_list_child(broker->downstream, broker->downstream->list_stream, link->name); } json_t *group = json_object_get(tokenNode->meta, "$$group"); if (json_is_string(group)) { json_object_set_nocheck(node->meta, "$$group", group); } token_used(tokenNode); broker_downstream_nodes_changed(broker); } else { log_err("Invalid token: %s\n", token); goto fail; } } json_object_set_new_nocheck(resp, "path", json_string_nocheck(buf)); link->path = dslink_strdup(buf); if (!link->path) { goto fail; } link->name = link->path + sizeof("/downstream/") - 1; // add to connecting map with the name if (dslink_map_set(&broker->client_connecting, dslink_ref((void *) link->name, NULL), dslink_ref(link, NULL)) != 0) { dslink_free((void *) link->path); goto fail; } } { ref_t *tmp = dslink_ref(dslink_strdup(dsId), dslink_free); if (!tmp) { goto fail; } // add to connecting map with dsId if (dslink_map_set(&broker->client_connecting, tmp, dslink_ref(link, NULL)) != 0) { dslink_free(tmp); goto fail; } } return resp; fail: if (link) { broker_remote_dslink_free(link); dslink_free((void *) link->path); dslink_free(link); } DSLINK_CHECKED_EXEC(json_decref, resp); return NULL; }
int broker_handshake_handle_ws(Broker *broker, Client *client, const char *dsId, const char *auth, const char *wsAccept) { ref_t *oldDsId = NULL; ref_t *ref = dslink_map_remove_get(&broker->client_connecting, (char *) dsId); if (!ref) { return 1; } RemoteDSLink *link = ref->data; dslink_decref(ref); if (link->name) { dslink_map_remove(&broker->client_connecting, (char *) link->name); } if (!(auth && link->auth->pubKey)) { return 1; } uv_timer_t *ping_timer = NULL; int ret = 0; { // Perform auth check char expectedAuth[90]; if (dslink_handshake_gen_auth_key(&link->auth->tempKey, link->auth->pubKey, link->auth->salt, (unsigned char *) expectedAuth, sizeof(expectedAuth)) != 0) { ret = 1; goto exit; } if (strcmp(expectedAuth, auth) != 0) { ret = 1; goto exit; } } DownstreamNode *node = NULL; int pendingUpdateList = 0; { // Handle retrieval of the downstream node ref = dslink_map_get(broker->downstream->children, (char *) link->name); if (!ref) { node = broker_init_downstream_node(broker->downstream, link->name); if (!node) { ret = 1; goto exit; } oldDsId = dslink_ref(dslink_strdup(dsId), dslink_free); if (broker->downstream->list_stream) { pendingUpdateList = 1; } broker_downstream_nodes_changed(broker); } else { node = ref->data; oldDsId = node->dsId; } } if (node->link) { Client *c = node->link->client; broker_close_link(node->link); uv_poll_t *poll = c->poll; dslink_socket_free(c->sock); dslink_free(c); uv_close((uv_handle_t *) poll, broker_free_handle); } // add permission group to link json_t *group = json_object_get(node->meta, "$$group"); permission_groups_load(&link->permission_groups, dsId, json_string_value(group)); link->client = client; link->dsId = oldDsId; link->node = node; node->dsId = oldDsId; client->sock_data = link; json_object_set_new(node->meta, "$$dsId", json_string_nocheck(dsId)); wslay_event_context_ptr ws; if (wslay_event_context_server_init(&ws, broker_ws_callbacks(), link) != 0) { ret = 1; goto exit; } link->ws = ws; broker_ws_send_init(client->sock, wsAccept); ping_timer = dslink_malloc(sizeof(uv_timer_t)); ping_timer->data = link; uv_timer_init(link->client->poll->loop, ping_timer); uv_timer_start(ping_timer, dslink_handle_ping, 1000, 30000); link->pingTimerHandle = ping_timer; // set the ->link and update all existing stream broker_dslink_connect(node, link); if (pendingUpdateList) { update_list_child(broker->downstream, broker->downstream->list_stream, link->name); } log_info("DSLink `%s` has connected\n", dsId); exit: mbedtls_ecdh_free(&link->auth->tempKey); dslink_free((void *) link->auth->pubKey); dslink_free(link->auth); link->auth = NULL; if (ret != 0) { dslink_map_free(&link->requester_streams); dslink_map_free(&link->responder_streams); dslink_free((char *)link->path); dslink_free(link); if (ping_timer) { uv_timer_stop(ping_timer); uv_close((uv_handle_t *) ping_timer, broker_free_handle); } } return ret; }