2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
27 #include "interface.h"
29 unsigned int debug_mask = 0;
30 const char *main_path = DEFAULT_MAIN_PATH;
31 const char *resolv_conf = DEFAULT_RESOLV_CONF;
32 static char **global_argv;
34 static struct list_head process_list = LIST_HEAD_INIT(process_list);
35 static struct list_head fds = LIST_HEAD_INIT(fds);
37 #define DEFAULT_LOG_LEVEL L_NOTICE
39 static int log_level = DEFAULT_LOG_LEVEL;
40 static const int log_class[] = {
42 [L_WARNING] = LOG_WARNING,
43 [L_NOTICE] = LOG_NOTICE,
49 #define use_syslog false
51 static bool use_syslog = true;
56 netifd_delete_process(struct netifd_process *proc)
58 if (proc->uloop.pending)
59 uloop_process_delete(&proc->uloop);
60 list_del(&proc->list);
61 netifd_fd_delete(&proc->log_fd);
62 close(proc->log_fd.fd);
70 netifd_log_message(int priority, const char *format, ...)
74 if (priority > log_level)
79 vsyslog(log_class[priority], format, vl);
81 vfprintf(stderr, format, vl);
86 netifd_process_log_cb(struct uloop_fd *fd, unsigned int events)
88 struct netifd_process *proc;
89 const char *log_prefix;
91 int maxlen, len, read_len;
93 proc = container_of(fd, struct netifd_process, log_uloop);
96 proc->log_buf = malloc(LOG_BUF_SIZE + 1);
98 log_prefix = proc->log_prefix;
100 log_prefix = "process";
103 buf = proc->log_buf + proc->log_buf_ofs;
104 maxlen = LOG_BUF_SIZE - proc->log_buf_ofs;
105 read_len = len = read(fd->fd, buf, maxlen);
114 proc->log_buf_ofs += len;
116 len = proc->log_buf_ofs;
119 cur = memchr(buf, '\n', len);
125 if (!proc->log_overflow)
126 netifd_log_message(L_NOTICE, "%s (%d): %s\n",
127 log_prefix, proc->uloop.pid, buf);
129 proc->log_overflow = false;
136 if (buf > proc->log_buf && len > 0)
137 memmove(proc->log_buf, buf, len);
139 if (len == LOG_BUF_SIZE) {
140 if (!proc->log_overflow) {
141 proc->log_buf[LOG_BUF_SIZE] = 0;
142 netifd_log_message(L_NOTICE, "%s (%d): %s [...]\n",
143 log_prefix, proc->uloop.pid, proc->log_buf);
144 proc->log_overflow = true;
148 proc->log_buf_ofs = len;
159 netifd_process_cb(struct uloop_process *proc, int ret)
161 struct netifd_process *np;
162 np = container_of(proc, struct netifd_process, uloop);
163 netifd_process_log_cb(&np->log_uloop, 0);
164 netifd_delete_process(np);
165 return np->cb(np, ret);
169 netifd_start_process(const char **argv, char **env, struct netifd_process *proc)
171 struct netifd_fd *fd;
175 netifd_kill_process(proc);
180 if ((pid = fork()) < 0)
190 if (proc->dir_fd >= 0)
191 fchdir(proc->dir_fd);
193 /* close all non-essential fds */
194 list_for_each_entry(fd, &fds, list) {
195 if (fd->proc == proc)
207 execvp(argv[0], (char **) argv);
215 proc->uloop.cb = netifd_process_cb;
216 proc->uloop.pid = pid;
217 uloop_process_add(&proc->uloop);
218 list_add_tail(&proc->list, &process_list);
220 proc->log_buf_ofs = 0;
221 proc->log_uloop.fd = proc->log_fd.fd = pfds[0];
222 proc->log_uloop.cb = netifd_process_log_cb;
223 netifd_fd_add(&proc->log_fd);
224 uloop_fd_add(&proc->log_uloop, ULOOP_EDGE_TRIGGER | ULOOP_READ);
235 netifd_kill_process(struct netifd_process *proc)
237 if (!proc->uloop.pending)
240 kill(proc->uloop.pid, SIGKILL);
241 netifd_delete_process(proc);
245 netifd_fd_add(struct netifd_fd *fd)
247 list_add_tail(&fd->list, &fds);
251 netifd_fd_delete(struct netifd_fd *fd)
256 static void netifd_do_restart(struct uloop_timeout *timeout)
258 execvp(global_argv[0], global_argv);
261 static void netifd_do_reload(struct uloop_timeout *timeout)
266 static struct uloop_timeout main_timer;
268 void netifd_reload(void)
270 main_timer.cb = netifd_do_reload;
271 uloop_timeout_set(&main_timer, 100);
274 void netifd_restart(void)
276 main_timer.cb = netifd_do_restart;
277 interface_set_down(NULL);
278 uloop_timeout_set(&main_timer, 1000);
281 static int usage(const char *progname)
283 fprintf(stderr, "Usage: %s [options]\n"
285 " -d <mask>: Mask for debug messages\n"
286 " -s <path>: Path to the ubus socket\n"
287 " -p <path>: Path to netifd addons (default: %s)\n"
288 " -h <path>: Path to the hotplug script\n"
289 " -r <path>: Path to resolv.conf\n"
290 " -l <level>: Log output level (default: %d)\n"
291 " -S: Use stderr instead of syslog for log messages\n"
292 " (default: "DEFAULT_HOTPLUG_PATH")\n"
293 "\n", progname, main_path, DEFAULT_LOG_LEVEL);
299 netifd_handle_signal(int signo)
305 netifd_setup_signals(void)
309 memset(&s, 0, sizeof(s));
310 s.sa_handler = netifd_handle_signal;
312 sigaction(SIGINT, &s, NULL);
313 sigaction(SIGTERM, &s, NULL);
314 sigaction(SIGUSR1, &s, NULL);
315 sigaction(SIGUSR2, &s, NULL);
317 s.sa_handler = SIG_IGN;
318 sigaction(SIGPIPE, &s, NULL);
322 netifd_kill_processes(void)
324 struct netifd_process *proc, *tmp;
326 list_for_each_entry_safe(proc, tmp, &process_list, list)
327 netifd_kill_process(proc);
330 int main(int argc, char **argv)
332 const char *socket = NULL;
337 while ((ch = getopt(argc, argv, "d:s:p:h:r:l:S")) != -1) {
340 debug_mask = strtoul(optarg, NULL, 0);
349 hotplug_cmd_path = optarg;
352 resolv_conf = optarg;
355 log_level = atoi(optarg);
356 if (log_level >= ARRAY_SIZE(log_class))
357 log_level = ARRAY_SIZE(log_class) - 1;
365 return usage(argv[0]);
370 openlog("netifd", 0, LOG_DAEMON);
372 netifd_setup_signals();
373 if (netifd_ubus_init(socket) < 0) {
374 fprintf(stderr, "Failed to connect to ubus\n");
379 fprintf(stderr, "Failed to initialize system control\n");
386 netifd_kill_processes();