| /* |
| * iproxy.c -- proxy that enables tcp service access to iOS devices |
| * |
| * Copyright (C) 2009-2020 Nikias Bassen <nikias@gmx.li> |
| * Copyright (C) 2014 Martin Szulecki <m.szulecki@libimobiledevice.org> |
| * 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 |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #define TOOL_NAME "iproxy" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <stddef.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <getopt.h> |
| #ifdef WIN32 |
| #include <winsock2.h> |
| #include <windows.h> |
| typedef unsigned int socklen_t; |
| #else |
| #include <sys/select.h> |
| #include <sys/socket.h> |
| #include <signal.h> |
| #endif |
| #include <libimobiledevice-glue/socket.h> |
| #include <libimobiledevice-glue/thread.h> |
| #include "usbmuxd.h" |
| |
| #ifndef ETIMEDOUT |
| #define ETIMEDOUT 138 |
| #endif |
| |
| static int debug_level = 0; |
| |
| struct client_data { |
| int fd; |
| int sfd; |
| char* udid; |
| enum usbmux_lookup_options lookup_opts; |
| uint16_t device_port; |
| }; |
| |
| #define CDATA_FREE(x) if (x) { \ |
| if ((x)->fd > 0) socket_close((x)->fd); \ |
| if ((x)->sfd > 0) socket_close((x)->sfd); \ |
| free((x)->udid); \ |
| free(x); \ |
| } |
| |
| static void *acceptor_thread(void *arg) |
| { |
| char buffer[32768]; |
| struct client_data *cdata = (struct client_data*)arg; |
| usbmuxd_device_info_t *dev_list = NULL; |
| usbmuxd_device_info_t *dev = NULL; |
| usbmuxd_device_info_t muxdev; |
| int count; |
| |
| if (!cdata) { |
| fprintf(stderr, "invalid client_data provided!\n"); |
| return NULL; |
| } |
| |
| if (cdata->udid) { |
| if (usbmuxd_get_device(cdata->udid, &muxdev, cdata->lookup_opts) > 0) { |
| dev = &muxdev; |
| } |
| } else { |
| if ((count = usbmuxd_get_device_list(&dev_list)) < 0) { |
| printf("Connecting to usbmuxd failed, terminating.\n"); |
| free(dev_list); |
| CDATA_FREE(cdata); |
| return NULL; |
| } |
| |
| if (dev_list == NULL || dev_list[0].handle == 0) { |
| printf("No connected device found, terminating.\n"); |
| free(dev_list); |
| CDATA_FREE(cdata); |
| return NULL; |
| } |
| |
| int i; |
| for (i = 0; i < count; i++) { |
| if (dev_list[i].conn_type == CONNECTION_TYPE_USB && (cdata->lookup_opts & DEVICE_LOOKUP_USBMUX)) { |
| dev = &(dev_list[i]); |
| break; |
| } |
| if (dev_list[i].conn_type == CONNECTION_TYPE_NETWORK && (cdata->lookup_opts & DEVICE_LOOKUP_NETWORK)) { |
| dev = &(dev_list[i]); |
| break; |
| } |
| } |
| } |
| |
| if (dev == NULL || dev->handle == 0) { |
| printf("No connected/matching device found, disconnecting client.\n"); |
| free(dev_list); |
| CDATA_FREE(cdata); |
| return NULL; |
| } |
| |
| cdata->sfd = -1; |
| if (dev->conn_type == CONNECTION_TYPE_NETWORK) { |
| struct sockaddr_storage saddr_storage; |
| struct sockaddr* saddr = (struct sockaddr*)&saddr_storage; |
| |
| if (((char*)dev->conn_data)[1] == 0x02) { // AF_INET |
| saddr->sa_family = AF_INET; |
| memcpy(&saddr->sa_data[0], (char*)dev->conn_data + 2, 14); |
| } |
| else if (((char*)dev->conn_data)[1] == 0x1E) { //AF_INET6 (bsd) |
| #ifdef AF_INET6 |
| saddr->sa_family = AF_INET6; |
| /* copy the address and the host dependent scope id */ |
| memcpy(&saddr->sa_data[0], (char*)dev->conn_data + 2, 26); |
| #else |
| fprintf(stderr, "ERROR: Got an IPv6 address but this system doesn't support IPv6\n"); |
| CDATA_FREE(cdata); |
| return NULL; |
| #endif |
| } |
| else { |
| fprintf(stderr, "Unsupported address family 0x%02x\n", ((char*)dev->conn_data)[1]); |
| CDATA_FREE(cdata); |
| return NULL; |
| } |
| char addrtxt[48]; |
| addrtxt[0] = '\0'; |
| if (!socket_addr_to_string(saddr, addrtxt, sizeof(addrtxt))) { |
| fprintf(stderr, "Failed to convert network address: %d (%s)\n", errno, strerror(errno)); |
| } |
| fprintf(stdout, "Requesting connecion to NETWORK device %s (serial: %s), port %d\n", addrtxt, dev->udid, cdata->device_port); |
| cdata->sfd = socket_connect_addr(saddr, cdata->device_port); |
| } else if (dev->conn_type == CONNECTION_TYPE_USB) { |
| fprintf(stdout, "Requesting connecion to USB device handle %d (serial: %s), port %d\n", dev->handle, dev->udid, cdata->device_port); |
| |
| cdata->sfd = usbmuxd_connect(dev->handle, cdata->device_port); |
| } |
| free(dev_list); |
| if (cdata->sfd < 0) { |
| fprintf(stderr, "Error connecting to device: %s\n", strerror(errno)); |
| } else { |
| fd_set fds; |
| FD_ZERO(&fds); |
| FD_SET(cdata->fd, &fds); |
| FD_SET(cdata->sfd, &fds); |
| |
| while (1) { |
| fd_set read_fds = fds; |
| int ret_sel = select(cdata->sfd+1, &read_fds, NULL, NULL, NULL); |
| if (ret_sel < 0) { |
| perror("select"); |
| break; |
| } |
| if (FD_ISSET(cdata->fd, &read_fds)) { |
| int r = socket_receive_timeout(cdata->fd, buffer, sizeof(buffer), 0, 100); |
| if (r <= 0) { |
| break; |
| } |
| int sent = 0; |
| while (sent < r) { |
| int s = socket_send(cdata->sfd, buffer+sent, r-sent); |
| if (s <= 0) { |
| break; |
| } |
| sent += s; |
| } |
| } |
| if (FD_ISSET(cdata->sfd, &read_fds)) { |
| int r = socket_receive_timeout(cdata->sfd, buffer, sizeof(buffer), 0, 100); |
| if (r <= 0) { |
| break; |
| } |
| int sent = 0; |
| while (sent < r) { |
| int s = socket_send(cdata->fd, buffer+sent, r-sent); |
| if (s <= 0) { |
| break; |
| } |
| sent += s; |
| } |
| } |
| } |
| } |
| |
| CDATA_FREE(cdata); |
| |
| return NULL; |
| } |
| |
| static void print_usage(int argc, char **argv, int is_error) |
| { |
| char *name = NULL; |
| name = strrchr(argv[0], '/'); |
| fprintf(is_error ? stderr : stdout, "Usage: %s [OPTIONS] LOCAL_PORT:DEVICE_PORT [LOCAL_PORT2:DEVICE_PORT2 ...]\n", (name ? name+1 : argv[0])); |
| fprintf(is_error ? stderr : stdout, |
| "\n" \ |
| "Proxy that binds local TCP ports to be forwarded to the specified ports on a usbmux device.\n" \ |
| "\n" \ |
| "OPTIONS:\n" \ |
| " -u, --udid UDID target specific device by UDID\n" \ |
| " -n, --network connect to network device\n" \ |
| " -l, --local connect to USB device (default)\n" \ |
| " -s, --source ADDR source address for listening socket (default 127.0.0.1)\n" \ |
| " -h, --help prints usage information\n" \ |
| " -d, --debug increase debug level\n" \ |
| " -v, --version prints version information\n" \ |
| "\n" \ |
| "Homepage: <" PACKAGE_URL ">\n" |
| "Bug Reports: <" PACKAGE_BUGREPORT ">\n" |
| ); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| char* device_udid = NULL; |
| char* source_addr = NULL; |
| uint16_t listen_port[16]; |
| uint16_t device_port[16]; |
| #ifdef AF_INET6 |
| #define MAX_LISTEN_NUM 32 |
| #else |
| #define MAX_LISTEN_NUM 16 |
| #endif |
| struct listen_sock { |
| int fd; |
| int index; |
| } listen_sock[MAX_LISTEN_NUM]; |
| int num_listen = 0; |
| int num_pairs = 0; |
| int i = 0; |
| enum usbmux_lookup_options lookup_opts = 0; |
| |
| const struct option longopts[] = { |
| { "debug", no_argument, NULL, 'd' }, |
| { "help", no_argument, NULL, 'h' }, |
| { "udid", required_argument, NULL, 'u' }, |
| { "local", no_argument, NULL, 'l' }, |
| { "network", no_argument, NULL, 'n' }, |
| { "source", required_argument, NULL, 's' }, |
| { "version", no_argument, NULL, 'v' }, |
| { NULL, 0, NULL, 0} |
| }; |
| int c = 0; |
| while ((c = getopt_long(argc, argv, "dhu:lns:v", longopts, NULL)) != -1) { |
| switch (c) { |
| case 'd': |
| libusbmuxd_set_debug_level(++debug_level); |
| break; |
| case 'u': |
| if (!*optarg) { |
| fprintf(stderr, "ERROR: UDID must not be empty!\n"); |
| print_usage(argc, argv, 1); |
| return 2; |
| } |
| free(device_udid); |
| device_udid = strdup(optarg); |
| break; |
| case 'l': |
| lookup_opts |= DEVICE_LOOKUP_USBMUX; |
| break; |
| case 'n': |
| lookup_opts |= DEVICE_LOOKUP_NETWORK; |
| break; |
| case 's': |
| if (!*optarg) { |
| fprintf(stderr, "ERROR: source address must not be empty!\n"); |
| print_usage(argc, argv, 1); |
| return 2; |
| } |
| free(source_addr); |
| source_addr = strdup(optarg); |
| break; |
| case 'h': |
| print_usage(argc, argv, 0); |
| return 0; |
| case 'v': |
| printf("%s %s\n", TOOL_NAME, PACKAGE_VERSION); |
| return 0; |
| default: |
| print_usage(argc, argv, 1); |
| return 2; |
| } |
| } |
| |
| if (lookup_opts == 0) { |
| lookup_opts = DEVICE_LOOKUP_USBMUX; |
| } |
| |
| argc -= optind; |
| argv += optind; |
| |
| if (argc == 0) { |
| fprintf(stderr, "ERROR: Not enough parameters. Need at least one pair of ports.\n"); |
| print_usage(argc + optind, argv - optind, 1); |
| free(device_udid); |
| free(source_addr); |
| return 2; |
| } |
| |
| if (argc == 2 && (strchr(argv[0], ':') == NULL) && (strchr(argv[1], ':') == NULL)) { |
| /* support old-style port pair specification */ |
| char* endp = NULL; |
| listen_port[0] = (uint16_t)strtol(argv[0], &endp, 10); |
| if (!listen_port[0] || *endp != '\0') { |
| fprintf(stderr, "Invalid listen port specified in argument '%s'!\n", argv[0]); |
| free(device_udid); |
| free(source_addr); |
| return -EINVAL; |
| } |
| endp = NULL; |
| device_port[0] = (uint16_t)strtol(argv[1], &endp, 10); |
| if (!device_port[0] || *endp != '\0') { |
| fprintf(stderr, "Invalid device port specified in argument '%s'!\n", argv[1]); |
| free(device_udid); |
| free(source_addr); |
| return -EINVAL; |
| } |
| num_pairs = 1; |
| } else { |
| /* new style, colon-separated local:device port pairs */ |
| for (i = 0; i < argc; i++) { |
| char* endp = NULL; |
| listen_port[i] = (uint16_t)strtol(argv[i], &endp, 10); |
| if (!listen_port[i] || (*endp != ':')) { |
| fprintf(stderr, "Invalid listen port specified in argument '%s'!\n", argv[i]); |
| free(device_udid); |
| free(source_addr); |
| return -EINVAL; |
| } |
| device_port[i] = (uint16_t)strtol(endp+1, &endp, 10); |
| if (!device_port[i] || (*endp != '\0')) { |
| fprintf(stderr, "Invalid device port specified in argument '%s'!\n", argv[i+1]); |
| free(device_udid); |
| free(source_addr); |
| return -EINVAL; |
| } |
| } |
| num_pairs = argc; |
| } |
| |
| if (num_pairs > 16) { |
| fprintf(stderr, "ERROR: Too many LOCAL:DEVICE port pairs. Maximum is 16.\n"); |
| return -1; |
| } |
| |
| #ifndef WIN32 |
| signal(SIGPIPE, SIG_IGN); |
| #endif |
| |
| // first create the listening sockets |
| for (i = 0; i < num_pairs; i++) { |
| printf("Creating listening port %d for device port %d\n", listen_port[i], device_port[i]); |
| if (!source_addr) { |
| listen_sock[num_listen].fd = socket_create("127.0.0.1", listen_port[i]); |
| if (listen_sock[num_listen].fd < 0) { |
| int j; |
| fprintf(stderr, "Error creating socket for listen port %u: %s\n", listen_port[i], strerror(errno)); |
| free(source_addr); |
| free(device_udid); |
| for (j = num_listen; j >= 0; j--) { |
| socket_close(listen_sock[j].fd); |
| } |
| return -errno; |
| } |
| listen_sock[num_listen].index = i; |
| num_listen++; |
| #if defined(AF_INET6) |
| listen_sock[num_listen].fd = socket_create("::1", listen_port[i]); |
| if (listen_sock[num_listen].fd < 0) { |
| int j; |
| fprintf(stderr, "Error creating socket for listen port %u: %s\n", listen_port[i], strerror(errno)); |
| free(source_addr); |
| free(device_udid); |
| for (j = num_listen; j >= 0; j--) { |
| socket_close(listen_sock[j].fd); |
| } |
| return -errno; |
| } |
| listen_sock[num_listen].index = i; |
| num_listen++; |
| #endif |
| } else { |
| listen_sock[num_listen].fd = socket_create(source_addr, listen_port[i]); |
| if (listen_sock[num_listen].fd < 0) { |
| int j; |
| fprintf(stderr, "Error creating socket for listen port %u: %s\n", listen_port[i], strerror(errno)); |
| free(source_addr); |
| free(device_udid); |
| for (j = num_listen; j >= 0; j--) { |
| socket_close(listen_sock[j].fd); |
| } |
| return -errno; |
| } |
| listen_sock[num_listen].index = i; |
| num_listen++; |
| } |
| } |
| |
| // make them non-blocking and add them to fd set |
| fd_set fds; |
| FD_ZERO(&fds); |
| for (i = 0; i < num_listen; i++) { |
| #ifdef WIN32 |
| u_long l_yes = 1; |
| ioctlsocket(listen_sock[i].fd, FIONBIO, &l_yes); |
| #else |
| int flags = fcntl(listen_sock[i].fd, F_GETFL, 0); |
| fcntl(listen_sock[i].fd, F_SETFL, flags | O_NONBLOCK); |
| #endif |
| FD_SET(listen_sock[i].fd, &fds); |
| } |
| |
| // main loop |
| while (1) { |
| printf("waiting for connection\n"); |
| fd_set read_fds = fds; |
| int ret_sel = select(listen_sock[num_listen-1].fd+1, &read_fds, NULL, NULL, NULL); |
| if (ret_sel < 0) { |
| perror("select"); |
| break; |
| } |
| for (i = 0; i < num_listen; i++) { |
| if (FD_ISSET(listen_sock[i].fd, &read_fds)) { |
| THREAD_T acceptor = THREAD_T_NULL; |
| struct client_data *cdata; |
| int c_sock = socket_accept(listen_sock[i].fd, listen_port[listen_sock[i].index]); |
| if (c_sock < 0) { |
| fprintf(stderr, "accept: %s\n", strerror(errno)); |
| break; |
| } |
| printf("New connection for %d->%d, fd = %d\n", listen_port[listen_sock[i].index], device_port[listen_sock[i].index], c_sock); |
| cdata = (struct client_data*)malloc(sizeof(struct client_data)); |
| if (!cdata) { |
| socket_close(c_sock); |
| fprintf(stderr, "ERROR: Out of memory\n"); |
| free(device_udid); |
| return -1; |
| } |
| cdata->fd = c_sock; |
| cdata->sfd = -1; |
| cdata->udid = (device_udid) ? strdup(device_udid) : NULL; |
| cdata->lookup_opts = lookup_opts; |
| cdata->device_port = device_port[listen_sock[i].index]; |
| |
| if (thread_new(&acceptor, acceptor_thread, cdata) == 0) { |
| thread_detach(acceptor); |
| } else { |
| fprintf(stderr, "ERROR: Failed to created acceptor thread!\n"); |
| } |
| } |
| } |
| } |
| |
| for (i = 0; i < num_listen; i++) { |
| socket_close(listen_sock[i].fd); |
| } |
| |
| free(device_udid); |
| free(source_addr); |
| |
| return 0; |
| } |