blob: a018cf734ddd0b68336bbb599515b1dae4c0a8f8 [file] [log] [blame]
/*
* iproxy.c -- proxy that enables tcp service access to iOS devices
*
* Copyright (C) 2014 Martin Szulecki <m.szulecki@libimobiledevice.org>
* Copyright (C) 2009 Nikias Bassen <nikias@gmx.li>
* Copyright (C) 2009 Paul Sladen <libiphone@paul.sladen.org>
*
* Based upon iTunnel source code, Copyright (c) 2008 Jing Su.
* http://www.cs.toronto.edu/~jingsu/itunnel/
*
* 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 of the License, or
* (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include <errno.h>
#ifdef WIN32
#include <windows.h>
#include <winsock2.h>
typedef unsigned int socklen_t;
#else
#include <sys/socket.h>
#include <sys/un.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <netinet/in.h>
#endif
#include "socket.h"
#include "usbmuxd.h"
#ifndef ETIMEDOUT
#define ETIMEDOUT 138
#endif
static uint16_t listen_port = 0;
static uint16_t device_port = 0;
static char* device_udid = NULL;
struct client_data {
int fd;
int sfd;
volatile int stop_ctos;
volatile int stop_stoc;
};
static void *run_stoc_loop(void *arg)
{
struct client_data *cdata = (struct client_data*)arg;
int recv_len;
int sent;
char buffer[131072];
printf("%s: fd = %d\n", __func__, cdata->fd);
while (!cdata->stop_stoc && cdata->fd > 0 && cdata->sfd > 0) {
recv_len = socket_receive_timeout(cdata->sfd, buffer, sizeof(buffer), 0, 5000);
if (recv_len <= 0) {
if (recv_len == 0 || recv_len == -ETIMEDOUT) {
// try again
continue;
} else {
fprintf(stderr, "recv failed: %s\n", strerror(-recv_len));
break;
}
} else {
// send to socket
sent = socket_send(cdata->fd, buffer, recv_len);
if (sent < recv_len) {
if (sent <= 0) {
fprintf(stderr, "send failed: %s\n", strerror(errno));
break;
} else {
fprintf(stderr, "only sent %d from %d bytes\n", sent, recv_len);
}
}
}
}
socket_close(cdata->fd);
cdata->fd = -1;
cdata->stop_ctos = 1;
return NULL;
}
static void *run_ctos_loop(void *arg)
{
struct client_data *cdata = (struct client_data*)arg;
int recv_len;
int sent;
char buffer[131072];
#ifdef WIN32
HANDLE stoc = NULL;
#else
pthread_t stoc;
#endif
printf("%s: fd = %d\n", __func__, cdata->fd);
cdata->stop_stoc = 0;
#ifdef WIN32
stoc = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)run_stoc_loop, cdata, 0, NULL);
#else
pthread_create(&stoc, NULL, run_stoc_loop, cdata);
#endif
while (!cdata->stop_ctos && cdata->fd>0 && cdata->sfd>0) {
recv_len = socket_receive_timeout(cdata->fd, buffer, sizeof(buffer), 0, 5000);
if (recv_len <= 0) {
if (recv_len == 0 || recv_len == -ETIMEDOUT) {
// try again
continue;
} else {
fprintf(stderr, "recv failed: %s\n", strerror(-recv_len));
break;
}
} else {
// send to local socket
sent = socket_send(cdata->sfd, buffer, recv_len);
if (sent < recv_len) {
if (sent <= 0) {
fprintf(stderr, "send failed: %s\n", strerror(errno));
break;
} else {
fprintf(stderr, "only sent %d from %d bytes\n", sent, recv_len);
}
}
}
}
socket_close(cdata->fd);
cdata->fd = -1;
cdata->stop_stoc = 1;
#ifdef WIN32
WaitForSingleObject(stoc, INFINITE);
#else
pthread_join(stoc, NULL);
#endif
return NULL;
}
static void *acceptor_thread(void *arg)
{
struct client_data *cdata;
usbmuxd_device_info_t *dev_list = NULL;
#ifdef WIN32
HANDLE ctos = NULL;
#else
pthread_t ctos;
#endif
int count;
if (!arg) {
fprintf(stderr, "invalid client_data provided!\n");
return NULL;
}
cdata = (struct client_data*)arg;
if ((count = usbmuxd_get_device_list(&dev_list)) < 0) {
printf("Connecting to usbmuxd failed, terminating.\n");
free(dev_list);
if (cdata->fd > 0) {
socket_close(cdata->fd);
}
free(cdata);
return NULL;
}
fprintf(stdout, "Number of available devices == %d\n", count);
if (dev_list == NULL || dev_list[0].handle == 0) {
printf("No connected device found, terminating.\n");
free(dev_list);
if (cdata->fd > 0) {
socket_close(cdata->fd);
}
free(cdata);
return NULL;
}
usbmuxd_device_info_t *dev = NULL;
if (device_udid) {
int i;
for (i = 0; i < count; i++) {
if (strncmp(dev_list[i].udid, device_udid, sizeof(dev_list[0].udid)) == 0) {
dev = &(dev_list[i]);
break;
}
}
} else {
dev = &(dev_list[0]);
}
if (dev == NULL || dev->handle == 0) {
printf("No connected/matching device found, disconnecting client.\n");
free(dev_list);
if (cdata->fd > 0) {
socket_close(cdata->fd);
}
free(cdata);
return NULL;
}
fprintf(stdout, "Requesting connecion to device handle == %d (serial: %s), port %d\n", dev->handle, dev->udid, device_port);
cdata->sfd = usbmuxd_connect(dev->handle, device_port);
free(dev_list);
if (cdata->sfd < 0) {
fprintf(stderr, "Error connecting to device!\n");
} else {
cdata->stop_ctos = 0;
#ifdef WIN32
ctos = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)run_ctos_loop, cdata, 0, NULL);
WaitForSingleObject(ctos, INFINITE);
#else
pthread_create(&ctos, NULL, run_ctos_loop, cdata);
pthread_join(ctos, NULL);
#endif
}
if (cdata->fd > 0) {
socket_close(cdata->fd);
}
if (cdata->sfd > 0) {
socket_close(cdata->sfd);
}
free(cdata);
return NULL;
}
int main(int argc, char **argv)
{
int mysock = -1;
if (argc < 3) {
printf("usage: %s LOCAL_TCP_PORT DEVICE_TCP_PORT [UDID]\n", argv[0]);
return 0;
}
listen_port = atoi(argv[1]);
device_port = atoi(argv[2]);
if (argc > 3) {
device_udid = argv[3];
}
if (!listen_port) {
fprintf(stderr, "Invalid listen_port specified!\n");
return -EINVAL;
}
if (!device_port) {
fprintf(stderr, "Invalid device_port specified!\n");
return -EINVAL;
}
// first create the listening socket endpoint waiting for connections.
mysock = socket_create(listen_port);
if (mysock < 0) {
fprintf(stderr, "Error creating socket: %s\n", strerror(errno));
return -errno;
} else {
#ifdef WIN32
HANDLE acceptor = NULL;
#else
pthread_t acceptor;
#endif
struct client_data *cdata;
int c_sock;
while (1) {
printf("waiting for connection\n");
c_sock = socket_accept(mysock, listen_port);
if (c_sock) {
printf("accepted connection, fd = %d\n", c_sock);
cdata = (struct client_data*)malloc(sizeof(struct client_data));
if (!cdata) {
socket_close(c_sock);
fprintf(stderr, "ERROR: Out of memory\n");
return -1;
}
cdata->fd = c_sock;
#ifdef WIN32
acceptor = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)acceptor_thread, cdata, 0, NULL);
CloseHandle(acceptor);
#else
pthread_create(&acceptor, NULL, acceptor_thread, cdata);
pthread_detach(acceptor);
#endif
} else {
break;
}
}
socket_close(c_sock);
socket_close(mysock);
}
return 0;
}