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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include "netifd.h"
#include "ubus.h"
#include "config.h"
#include "system.h"
#include "interface.h"
unsigned int debug_mask = 0;
const char *main_path = DEFAULT_MAIN_PATH;
const char *resolv_conf = DEFAULT_RESOLV_CONF;
static char **global_argv;
static struct list_head process_list = LIST_HEAD_INIT(process_list);
static struct list_head fds = LIST_HEAD_INIT(fds);
static void
netifd_process_cb(struct uloop_process *proc, int ret)
{
struct netifd_process *np;
np = container_of(proc, struct netifd_process, uloop);
list_del(&np->list);
return np->cb(np, ret);
}
int
netifd_start_process(const char **argv, char **env, struct netifd_process *proc)
{
struct netifd_fd *fd;
int pid;
netifd_kill_process(proc);
if ((pid = fork()) < 0)
return -1;
if (!pid) {
if (env) {
while (*env) {
putenv(*env);
env++;
}
}
if (proc->dir_fd >= 0)
fchdir(proc->dir_fd);
/* close all non-essential fds */
list_for_each_entry(fd, &fds, list) {
if (fd->proc == proc)
continue;
close(fd->fd);
}
execvp(argv[0], (char **) argv);
exit(127);
}
if (pid < 0)
return -1;
proc->uloop.cb = netifd_process_cb;
proc->uloop.pid = pid;
uloop_process_add(&proc->uloop);
list_add_tail(&proc->list, &process_list);
return 0;
}
void
netifd_kill_process(struct netifd_process *proc)
{
if (!proc->uloop.pending)
return;
kill(proc->uloop.pid, SIGTERM);
uloop_process_delete(&proc->uloop);
list_del(&proc->list);
}
void
netifd_fd_add(struct netifd_fd *fd)
{
list_add_tail(&fd->list, &fds);
}
void
netifd_fd_delete(struct netifd_fd *fd)
{
list_del(&fd->list);
}
static void netifd_do_restart(struct uloop_timeout *timeout)
{
execvp(global_argv[0], global_argv);
}
static void netifd_do_reload(struct uloop_timeout *timeout)
{
config_init_interfaces(NULL);
}
static struct uloop_timeout main_timer;
void netifd_reload(void)
{
main_timer.cb = netifd_do_reload;
uloop_timeout_set(&main_timer, 100);
}
void netifd_restart(void)
{
main_timer.cb = netifd_do_restart;
interface_set_down(NULL);
uloop_timeout_set(&main_timer, 1000);
}
static int usage(const char *progname)
{
fprintf(stderr, "Usage: %s [options]\n"
"Options:\n"
" -d <mask>: Mask for debug messages\n"
" -s <path>: Path to the ubus socket\n"
" -p <path>: Path to netifd addons (default: %s)\n"
" -h <path>: Path to the hotplug script\n"
" -r <path>: Path to resolv.conf\n"
" (default: "DEFAULT_HOTPLUG_PATH")\n"
"\n", progname, main_path);
return 1;
}
static void
netifd_handle_signal(int signo)
{
uloop_end();
}
static void
netifd_setup_signals(void)
{
struct sigaction s;
memset(&s, 0, sizeof(s));
s.sa_handler = netifd_handle_signal;
s.sa_flags = 0;
sigaction(SIGINT, &s, NULL);
sigaction(SIGTERM, &s, NULL);
sigaction(SIGUSR1, &s, NULL);
sigaction(SIGUSR2, &s, NULL);
}
static void
netifd_kill_processes(void)
{
struct netifd_process *proc, *tmp;
list_for_each_entry_safe(proc, tmp, &process_list, list)
netifd_kill_process(proc);
}
int main(int argc, char **argv)
{
const char *socket = NULL;
int ch;
global_argv = argv;
while ((ch = getopt(argc, argv, "d:s:p:h:r:")) != -1) {
switch(ch) {
case 'd':
debug_mask = strtoul(optarg, NULL, 0);
break;
case 's':
socket = optarg;
break;
case 'p':
main_path = optarg;
break;
case 'h':
hotplug_cmd_path = optarg;
break;
case 'r':
resolv_conf = optarg;
break;
default:
return usage(argv[0]);
}
}
netifd_setup_signals();
if (netifd_ubus_init(socket) < 0) {
fprintf(stderr, "Failed to connect to ubus\n");
return 1;
}
if (system_init()) {
fprintf(stderr, "Failed to initialize system control\n");
return 1;
}
config_init_interfaces(NULL);
uloop_run();
netifd_kill_processes();
netifd_ubus_done();
return 0;
}
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