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/*
usbmuxd - iPhone/iPod Touch USB multiplex server daemon
Copyright (C) 2009 Hector Martin "marcan" <hector@marcansoft.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 or version 3.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define _BSD_SOURCE
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/stat.h>
#include "log.h"
#include "usb.h"
#include "device.h"
#include "client.h"
static const char *socket_path = "/var/run/usbmuxd"; //TODO: CHANGEME
int should_exit;
struct sigaction sa_old;
int create_socket(void) {
struct sockaddr_un bind_addr;
int listenfd;
if(unlink(socket_path) == -1 && errno != ENOENT) {
usbmuxd_log(LL_FATAL, "unlink(%s) failed: %s", socket_path, strerror(errno));
return -1;
}
listenfd = socket(AF_UNIX, SOCK_STREAM, 0);
if (listenfd == -1) {
usbmuxd_log(LL_FATAL, "socket() failed: %s", strerror(errno));
return -1;
}
bzero(&bind_addr, sizeof(bind_addr));
bind_addr.sun_family = AF_UNIX;
strcpy(bind_addr.sun_path, socket_path);
if (bind(listenfd, (struct sockaddr*)&bind_addr, sizeof(bind_addr)) != 0) {
usbmuxd_log(LL_FATAL, "bind() failed: %s", strerror(errno));
return -1;
}
// Start listening
if (listen(listenfd, 5) != 0) {
usbmuxd_log(LL_FATAL, "listen() failed: %s", strerror(errno));
return -1;
}
chmod(socket_path, 0666);
return listenfd;
}
void handle_signal(int sig)
{
if(sig == SIGINT) {
usbmuxd_log(LL_NOTICE,"Caught SIGINT");
} else {
usbmuxd_log(LL_NOTICE,"Caught unknown signal %d", sig);
}
should_exit = 1;
sigaction(SIGINT, &sa_old, NULL);
}
void set_signal_handlers(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = handle_signal;
sigaction(SIGINT, &sa, &sa_old);
}
int main_loop(int listenfd)
{
int to, cnt, i, dto;
struct fdlist pollfds;
while(!should_exit) {
usbmuxd_log(LL_FLOOD, "main_loop iteration");
to = usb_get_timeout();
usbmuxd_log(LL_FLOOD, "USB timeout is %d ms", to);
dto = device_get_timeout();
usbmuxd_log(LL_FLOOD, "Device timeout is %d ms", to);
if(dto < to)
to = dto;
fdlist_create(&pollfds);
fdlist_add(&pollfds, FD_LISTEN, listenfd, POLLIN);
usb_get_fds(&pollfds);
client_get_fds(&pollfds);
usbmuxd_log(LL_FLOOD, "fd count is %d", pollfds.count);
cnt = poll(pollfds.fds, pollfds.count, to);
usbmuxd_log(LL_FLOOD, "poll() returned %d", cnt);
if(cnt == -1) {
if(errno == EINTR && should_exit) {
usbmuxd_log(LL_INFO, "event processing interrupted");
fdlist_free(&pollfds);
return 0;
}
} else if(cnt == 0) {
if(usb_process() < 0) {
usbmuxd_log(LL_FATAL, "usb_process() failed");
fdlist_free(&pollfds);
return -1;
}
device_check_timeouts();
} else {
int done_usb = 0;
for(i=0; i<pollfds.count; i++) {
if(pollfds.fds[i].revents) {
if(!done_usb && pollfds.owners[i] == FD_USB) {
if(usb_process() < 0) {
usbmuxd_log(LL_FATAL, "usb_process() failed");
fdlist_free(&pollfds);
return -1;
}
done_usb = 1;
}
if(pollfds.owners[i] == FD_LISTEN) {
if(client_accept(listenfd) < 0) {
usbmuxd_log(LL_FATAL, "client_accept() failed");
fdlist_free(&pollfds);
return -1;
}
}
if(pollfds.owners[i] == FD_CLIENT) {
client_process(pollfds.fds[i].fd, pollfds.fds[i].revents);
}
}
}
}
fdlist_free(&pollfds);
}
return 0;
}
int main(int argc, char *argv[])
{
int listenfd;
int res;
usbmuxd_log(LL_NOTICE, "usbmux v0.1 starting up");
should_exit = 0;
set_signal_handlers();
usbmuxd_log(LL_INFO, "Creating socket");
listenfd = create_socket();
if(listenfd < 0)
return 1;
client_init();
device_init();
usbmuxd_log(LL_INFO, "Initializing USB");
if((res = usb_init()) < 0)
return 2;
usbmuxd_log(LL_INFO, "%d device%s detected", res, (res==1)?"":"s");
usbmuxd_log(LL_NOTICE, "Initialization complete");
res = main_loop(listenfd);
if(res < 0)
usbmuxd_log(LL_FATAL, "main_loop failed");
usbmuxd_log(LL_NOTICE, "usbmux shutting down");
device_kill_connections();
usb_shutdown();
device_shutdown();
client_shutdown();
usbmuxd_log(LL_NOTICE, "Shutdown complete");
if(res < 0)
return -res;
return 0;
}
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