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/*
* icat.c -- simple netcat-like tool that enables service access to iOS devices
*
* Copyright (C) 2017 Adrien Guinet <adrien@guinet.me>
*
* Based on iproxy which is 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 <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include <errno.h>
#ifdef WIN32
#include <windows.h>
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <signal.h>
#endif
#include "usbmuxd.h"
#include "socket.h"
static size_t read_data_socket(int fd, uint8_t* buf, size_t bufsize)
{
#ifdef WIN32
u_long bytesavailable = 0;
if (fd == STDIN_FILENO) {
bytesavailable = bufsize;
} else if (ioctlsocket(fd, FIONREAD, &bytesavailable) != 0) {
perror("ioctlsocket FIONREAD failed");
exit(1);
}
#else
size_t bytesavailable = 0;
if (ioctl(fd, FIONREAD, &bytesavailable) != 0) {
perror("ioctl FIONREAD failed");
exit(1);
}
#endif
size_t bufread = (bytesavailable >= bufsize) ? bufsize:bytesavailable;
ssize_t ret = read(fd, buf, bufread);
if (ret < 0) {
perror("read failed");
exit(1);
}
return (size_t)ret;
}
int main(int argc, char **argv)
{
if (argc < 2) {
printf("usage: %s DEVICE_TCP_PORT [UDID]\n", argv[0]);
return 1;
}
int device_port = atoi(argv[1]);
char* device_udid = NULL;
if (argc > 2) {
device_udid = argv[2];
}
if (!device_port) {
fprintf(stderr, "Invalid device_port specified!\n");
return -EINVAL;
}
#ifndef WIN32
signal(SIGPIPE, SIG_IGN);
#endif
usbmuxd_device_info_t *dev_list = NULL;
int count;
if ((count = usbmuxd_get_device_list(&dev_list)) < 0) {
printf("Connecting to usbmuxd failed, terminating.\n");
free(dev_list);
return 1;
}
if (dev_list == NULL || dev_list[0].handle == 0) {
fprintf(stderr, "No connected device found, terminating.\n");
free(dev_list);
return 1;
}
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) {
fprintf(stderr, "No connected/matching device found, disconnecting client.\n");
free(dev_list);
return 1;
}
int devfd = usbmuxd_connect(dev->handle, device_port);
free(dev_list);
if (devfd < 0) {
fprintf(stderr, "Error connecting to device!\n");
return 1;
}
fd_set fds;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
FD_SET(devfd, &fds);
int ret = 0;
uint8_t buf[4096];
while (1) {
fd_set read_fds = fds;
int ret_sel = select(devfd+1, &read_fds, NULL, NULL, NULL);
if (ret_sel < 0) {
perror("select");
ret = 1;
break;
}
if (FD_ISSET(STDIN_FILENO, &read_fds)) {
size_t n = read_data_socket(STDIN_FILENO, buf, sizeof(buf));
if (n == 0) {
break;
}
write(devfd, buf, n);
}
if (FD_ISSET(devfd, &read_fds)) {
size_t n = read_data_socket(devfd, buf, sizeof(buf));
if (n == 0) {
break;
}
write(STDOUT_FILENO, buf, n);
}
}
socket_close(devfd);
return ret;
}
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