2 * Copyright (C) 2016 "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.
27 #include <sys/types.h>
31 #include <sys/syscall.h>
34 #include "afb-plugin.h"
35 #include "afb-req-itf.h"
36 #include "afb-poll-itf.h"
40 #include "afb-api-so.h"
42 #include "utils-upoll.h"
45 struct AFB_plugin *plugin; /* descriptor */
46 void *handle; /* context of dlopen */
47 struct AFB_interface interface;
50 static int api_timeout = 15;
52 static const char plugin_register_function[] = "pluginRegister";
54 static const struct afb_pollitf upollitf = {
55 .wait = (void*)upoll_wait,
56 .open = (void*)upoll_open,
57 .on_readable = (void*)upoll_on_readable,
58 .on_writable = (void*)upoll_on_writable,
59 .on_hangup = (void*)upoll_on_hangup,
60 .close = (void*)upoll_close
63 static void free_context(struct api_so_desc *desc, void *context)
67 cb = desc->plugin->freeCtxCB;
75 // Check of apiurl is declare in this plugin and call it
76 extern __thread sigjmp_buf *error_handler;
77 static void trapping_call(struct afb_req req, void(*cb)(struct afb_req))
79 volatile int signum, timerset;
81 sigjmp_buf jmpbuf, *older;
83 struct itimerspec its;
85 // save context before calling the API
87 older = error_handler;
88 signum = setjmp(jmpbuf);
90 afb_req_fail_f(req, "aborted", "signal %d caught", signum);
93 error_handler = &jmpbuf;
94 if (api_timeout > 0) {
95 timerset = 1; /* TODO: check statuses */
96 sevp.sigev_notify = SIGEV_THREAD_ID;
97 sevp.sigev_signo = SIGALRM;
98 sevp.sigev_value.sival_ptr = NULL;
99 #if defined(sigev_notify_thread_id)
100 sevp.sigev_notify_thread_id = (pid_t)syscall(SYS_gettid);
102 sevp._sigev_un._tid = (pid_t)syscall(SYS_gettid);
104 timer_create(CLOCK_THREAD_CPUTIME_ID, &sevp, &timerid);
105 its.it_interval.tv_sec = 0;
106 its.it_interval.tv_nsec = 0;
107 its.it_value.tv_sec = api_timeout;
108 its.it_value.tv_nsec = 0;
109 timer_settime(timerid, 0, &its, NULL);
115 timer_delete(timerid);
116 error_handler = older;
119 static void call_check(struct afb_req req, const struct AFB_restapi *verb)
121 switch(verb->session) {
122 case AFB_SESSION_CREATE:
123 if (!afb_req_session_create(req))
126 case AFB_SESSION_RENEW:
127 if (!afb_req_session_check(req, 1))
130 case AFB_SESSION_CLOSE:
131 case AFB_SESSION_CHECK:
132 if (!afb_req_session_check(req, 0))
135 case AFB_SESSION_NONE:
139 trapping_call(req, verb->callback);
141 if (verb->session == AFB_SESSION_CLOSE)
142 afb_req_session_close(req);
145 static void call(struct api_so_desc *desc, struct afb_req req, const char *verb, size_t lenverb)
147 const struct AFB_restapi *v;
149 v = desc->plugin->apis;
150 while (v->name && (strncasecmp(v->name, verb, lenverb) || v->name[lenverb]))
155 afb_req_fail_f(req, "unknown-verb", "verb %.*s unknown within api %s", (int)lenverb, verb, desc->plugin->prefix);
160 int afb_api_so_add_plugin(const char *path)
162 struct api_so_desc *desc;
163 struct AFB_plugin *(*pluginRegisterFct) (const struct AFB_interface *interface);
165 desc = calloc(1, sizeof *desc);
167 fprintf(stderr, "[%s] out of memory\n", path);
171 // This is a loadable library let's check if it's a plugin
172 desc->handle = dlopen(path, RTLD_NOW | RTLD_LOCAL);
173 if (desc->handle == NULL) {
174 fprintf(stderr, "[%s] not loadable, continuing...\n", path);
178 /* retrieves the register function */
179 pluginRegisterFct = dlsym(desc->handle, plugin_register_function);
180 if (!pluginRegisterFct) {
181 fprintf(stderr, "[%s] not an AFB plugin, continuing...\n", path);
185 fprintf(stderr, "[%s] is a valid AFB plugin\n", path);
187 /* init the interface */
188 desc->interface.verbosity = 0;
189 desc->interface.mode = AFB_MODE_LOCAL;
190 desc->interface.pollitf = &upollitf;
191 desc->interface.pollclosure = NULL;
193 /* init the plugin */
194 desc->plugin = pluginRegisterFct(&desc->interface);
195 if (desc->plugin == NULL) {
196 fprintf(stderr, "ERROR: plugin [%s] register function failed. continuing...\n", path);
200 /* check the returned structure */
201 if (desc->plugin->type != AFB_PLUGIN_JSON) {
202 fprintf(stderr, "ERROR: plugin [%s] invalid type %d...\n", path, desc->plugin->type);
205 if (desc->plugin->prefix == NULL || *desc->plugin->prefix == 0) {
206 fprintf(stderr, "ERROR: plugin [%s] bad prefix...\n", path);
209 if (desc->plugin->info == NULL || *desc->plugin->info == 0) {
210 fprintf(stderr, "ERROR: plugin [%s] bad description...\n", path);
213 if (desc->plugin->apis == NULL) {
214 fprintf(stderr, "ERROR: plugin [%s] no APIs...\n", path);
218 /* records the plugin */
219 if (afb_apis_add(desc->plugin->prefix, (struct afb_api){
222 .free_context = (void*)free_context}) < 0) {
223 fprintf(stderr, "ERROR: plugin [%s] can't be registered...\n", path);
230 dlclose(desc->handle);
237 static int adddirs(char path[PATH_MAX], size_t end)
240 struct dirent ent, *result;
243 /* open the DIR now */
246 fprintf(stderr, "ERROR in scanning plugin directory %s, %m\n", path);
250 fprintf(stderr, "Scanning dir=[%s] for plugins\n", path);
252 /* scan each entry */
256 readdir_r(dir, &ent, &result);
260 len = strlen(ent.d_name);
261 if (len + end >= PATH_MAX) {
262 fprintf(stderr, "path too long for %s\n", ent.d_name);
265 memcpy(&path[end], ent.d_name, len+1);
266 if (ent.d_type == DT_DIR) {
267 /* case of directories */
268 if (ent.d_name[0] == '.') {
271 if (ent.d_name[1] == '.' && len == 2)
274 adddirs(path, end+len);;
275 } else if (ent.d_type == DT_REG) {
277 if (!strstr(ent.d_name, ".so"))
279 afb_api_so_add_plugin(path);
286 int afb_api_so_add_directory(const char *path)
289 char buffer[PATH_MAX];
291 length = strlen(path);
292 if (length >= sizeof(buffer)) {
293 fprintf(stderr, "path too long %lu [%.99s...]\n", (unsigned long)length, path);
297 memcpy(buffer, path, length + 1);
298 return adddirs(buffer, length);
301 int afb_api_so_add_path(const char *path)
306 rc = stat(path, &st);
308 fprintf(stderr, "Invalid plugin path [%s]: %m\n", path);
309 else if (S_ISDIR(st.st_mode))
310 rc = afb_api_so_add_directory(path);
312 rc = afb_api_so_add_plugin(path);
316 int afb_api_so_add_pathset(const char *pathset)
318 static char sep[] = ":";
321 ps = strdupa(pathset);
323 p = strsep(&ps, sep);
326 afb_api_so_add_path(p);