2 * Copyright (C) 2015-2018 "IoT.bzh"
3 * Author José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
28 #include <sys/types.h>
29 #include <sys/socket.h>
33 #include "afb-apiset.h"
34 #include "afb-api-ws.h"
36 #include "afb-socket.h"
37 #include "afb-stub-ws.h"
43 struct afb_apiset *apiset; /* the apiset for calling */
44 struct fdev *fdev; /* fdev handler */
45 uint16_t offapi; /* api name of the interface */
46 char uri[1]; /* the uri of the server socket */
49 /******************************************************************************/
51 /******************************************************************************/
53 int afb_api_ws_add_client(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set, int strong)
55 struct afb_stub_ws *stubws;
59 /* check the api name */
60 api = afb_socket_api(uri);
61 if (api == NULL || !afb_api_is_valid_name(api)) {
62 ERROR("invalid (too long) ws client uri %s", uri);
68 fdev = afb_socket_open_fdev(uri, 0);
70 /* create the client stub */
71 stubws = afb_stub_ws_create_client(fdev, api, call_set);
73 ERROR("can't setup client ws service to %s", uri);
76 if (afb_stub_ws_client_add(stubws, declare_set) >= 0)
78 ERROR("can't add the client to the apiset for service %s", uri);
79 afb_stub_ws_unref(stubws);
86 int afb_api_ws_add_client_strong(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
88 return afb_api_ws_add_client(uri, declare_set, call_set, 1);
91 int afb_api_ws_add_client_weak(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
93 return afb_api_ws_add_client(uri, declare_set, call_set, 0);
96 /*****************************************************************************/
98 /******************************************************************************/
100 static void api_ws_server_accept(struct api_ws_server *apiws)
103 struct sockaddr addr;
106 struct afb_stub_ws *server;
108 lenaddr = (socklen_t)sizeof addr;
109 fd = accept(fdev_fd(apiws->fdev), &addr, &lenaddr);
111 ERROR("can't accept connection to %s: %m", apiws->uri);
113 fdev = afb_fdev_create(fd);
115 ERROR("can't hold accepted connection to %s: %m", apiws->uri);
118 server = afb_stub_ws_create_server(fdev, &apiws->uri[apiws->offapi], apiws->apiset);
120 ERROR("can't serve accepted connection to %s: %m", apiws->uri);
125 static int api_ws_server_connect(struct api_ws_server *apiws);
127 static void api_ws_server_listen_callback(void *closure, uint32_t revents, struct fdev *fdev)
129 struct api_ws_server *apiws = closure;
131 if ((revents & EPOLLIN) != 0)
132 api_ws_server_accept(apiws);
133 if ((revents & EPOLLHUP) != 0)
134 api_ws_server_connect(apiws);
137 static void api_ws_server_disconnect(struct api_ws_server *apiws)
139 fdev_unref(apiws->fdev);
143 static int api_ws_server_connect(struct api_ws_server *apiws)
145 /* ensure disconnected */
146 api_ws_server_disconnect(apiws);
148 /* request the service object name */
149 apiws->fdev = afb_socket_open_fdev(apiws->uri, 1);
151 ERROR("can't create socket %s", apiws->uri);
153 /* listen for service */
154 fdev_set_events(apiws->fdev, EPOLLIN);
155 fdev_set_callback(apiws->fdev, api_ws_server_listen_callback, apiws);
161 /* create the service */
162 int afb_api_ws_add_server(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set)
166 struct api_ws_server *apiws;
167 size_t luri, lapi, extra;
172 ERROR("can't create socket %s", uri);
177 /* check the api name */
178 api = afb_socket_api(uri);
179 if (api == NULL || !afb_api_is_valid_name(api)) {
180 ERROR("invalid api name in ws uri %s", uri);
186 if (!afb_apiset_lookup(call_set, api, 1)) {
187 ERROR("Can't provide ws-server for URI %s: API %s doesn't exist", uri, api);
192 /* make the structure */
194 extra = luri == (api - uri) + lapi ? 0 : lapi + 1;
195 apiws = malloc(sizeof * apiws + luri + extra);
197 ERROR("out of memory");
202 apiws->apiset = afb_apiset_addref(call_set);
204 strcpy(apiws->uri, uri);
206 apiws->offapi = (uint16_t)(api - uri);
208 apiws->offapi = (uint16_t)(luri + 1);
209 strcpy(&apiws->uri[apiws->offapi], api);
212 /* connect for serving */
213 rc = api_ws_server_connect(apiws);
217 afb_apiset_unref(apiws->apiset);