summaryrefslogtreecommitdiffstats
path: root/tools/idevicedebugserverproxy.c
blob: 9ccb3c3ec820feefa2fbdcbfc244a7fa8b427eb1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
/*
 * idevicedebugserverproxy.c
 * Proxy a debugserver connection from device for remote debugging
 *
 * Copyright (c) 2012 Martin Szulecki All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; 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 <errno.h>
#include <signal.h>

#include <libimobiledevice/libimobiledevice.h>
#include <libimobiledevice/lockdown.h>

#include "common/socket.h"
#include "common/thread.h"

#define info(...) fprintf(stdout, __VA_ARGS__); fflush(stdout)
#define debug(...) if(debug_mode) fprintf(stdout, __VA_ARGS__)

static int debug_mode = 0;
static int quit_flag = 0;

typedef struct {
	int server_fd;
	int client_fd;
	uint16_t local_port;
	uint16_t remote_port;
	idevice_connection_t device_connection;
	volatile int stop_ctod;
	volatile int stop_dtoc;
} socket_info_t;

static void clean_exit(int sig)
{
	fprintf(stderr, "Exiting...\n");
	quit_flag++;
}

static void print_usage(int argc, char **argv)
{
	char *name = NULL;

	name = strrchr(argv[0], '/');
	printf("Usage: %s [OPTIONS] <PORT>\n", (name ? name + 1: argv[0]));
	printf("Proxy debugserver connection from device to a local socket at PORT.\n\n");
	printf("  -d, --debug\t\tenable communication debugging\n");
	printf("  -u, --udid UDID\ttarget specific device by its 40-digit device UDID\n");
	printf("  -h, --help\t\tprints usage information\n");
	printf("\n");
}

static void *thread_device_to_client(void *data)
{
	socket_info_t* socket_info = (socket_info_t*)data;
	idevice_error_t res = IDEVICE_E_UNKNOWN_ERROR;

	int recv_len;
	int sent;
	char buffer[131072];

	debug("%s: started thread...\n", __func__);

	debug("%s: client_fd = %d\n", __func__, socket_info->client_fd);
	debug("%s: server fd = %d\n", __func__, socket_info->server_fd);

	while (!quit_flag && !socket_info->stop_dtoc && socket_info->client_fd > 0 && socket_info->server_fd > 0) {
		debug("%s: receiving data from device...\n", __func__);

		res = idevice_connection_receive_timeout(socket_info->device_connection, buffer, sizeof(buffer), (uint32_t*)&recv_len, 5000);

		if (recv_len <= 0) {
			if (recv_len == 0 && res == IDEVICE_E_SUCCESS) {
				// try again
				continue;
			} else {
				fprintf(stderr, "recv failed: %s\n", strerror(errno));
				break;
			}
		} else {
			/* send to device */
			debug("%s: sending data to client...\n", __func__);
			sent = socket_send(socket_info->client_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);
				}
			} else {
				// sending succeeded, receive from device
				debug("%s: pushed %d bytes to client\n", __func__, sent);
			}
		}
	}

	debug("%s: shutting down...\n", __func__);

	socket_shutdown(socket_info->client_fd, SHUT_RDWR);
	socket_close(socket_info->client_fd);

	socket_info->client_fd = -1;
	socket_info->stop_ctod = 1;

	return NULL;
}

static void *thread_client_to_device(void *data)
{
	socket_info_t* socket_info = (socket_info_t*)data;
	idevice_error_t res = IDEVICE_E_UNKNOWN_ERROR;

	int recv_len;
	int sent;
	char buffer[131072];
	thread_t dtoc;

	debug("%s: started thread...\n", __func__);

	debug("%s: client_fd = %d\n", __func__, socket_info->client_fd);
	debug("%s: server_fd = %d\n", __func__, socket_info->server_fd);

	/* spawn server to client thread */
	socket_info->stop_dtoc = 0;
	if (thread_create(&dtoc, thread_device_to_client, data) != 0) {
		fprintf(stderr, "Failed to start device to client thread...\n");
	}

	while (!quit_flag && !socket_info->stop_ctod && socket_info->client_fd > 0 && socket_info->server_fd > 0) {
		debug("%s: receiving data from client...\n", __func__);

		/* attempt to read incoming data from client */
		recv_len = socket_receive_timeout(socket_info->client_fd, buffer, sizeof(buffer), 0, 5000);

		/* any data received? */
		if (recv_len <= 0) {
			if (recv_len == 0) {
				/* try again */
				continue;
			} else {
				fprintf(stderr, "Receive failed: %s\n", strerror(errno));
				break;
			}
		} else {
			/* forward data to device */
			debug("%s: sending data to device...\n", __func__);
			res = idevice_connection_send(socket_info->device_connection, buffer, recv_len, (uint32_t*)&sent);

			if (sent < recv_len || res != IDEVICE_E_SUCCESS) {
				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);
				}
			} else {
				// sending succeeded, receive from device
				debug("%s: sent %d bytes to device\n", __func__, sent);
			}
		}
	}

	debug("%s: shutting down...\n", __func__);

	socket_shutdown(socket_info->client_fd, SHUT_RDWR);
	socket_close(socket_info->client_fd);

	socket_info->client_fd = -1;
	socket_info->stop_dtoc = 1;

	/* join other thread to allow it to stop */
	thread_join(dtoc);

	return NULL;
}

static void* connection_handler(void* data)
{
	socket_info_t* socket_info = (socket_info_t*)data;
	thread_t ctod;

	debug("%s: client_fd = %d\n", __func__, socket_info->client_fd);

	/* spawn client to device thread */
	socket_info->stop_ctod = 0;
	if (thread_create(&ctod, thread_client_to_device, data) != 0) {
		fprintf(stderr, "Failed to start client to device thread...\n");
	}

	/* join the fun */
	thread_join(ctod);

	/* shutdown client socket */
	socket_shutdown(socket_info->client_fd, SHUT_RDWR);
	socket_close(socket_info->client_fd);

	/* shutdown server socket if we have to terminate to unblock the server loop */
	if (quit_flag) {
		socket_shutdown(socket_info->server_fd, SHUT_RDWR);
		socket_close(socket_info->server_fd);
	}

	return NULL;
}

int main(int argc, char *argv[])
{
	lockdownd_client_t lockdown = NULL;
	lockdownd_error_t ldret = LOCKDOWN_E_UNKNOWN_ERROR;
	idevice_t device = NULL;
	idevice_connection_t connection = NULL;
	idevice_error_t ret = IDEVICE_E_UNKNOWN_ERROR;
	thread_t th;
	const char* udid = NULL;
	lockdownd_service_descriptor_t service = NULL;
	uint16_t local_port = 0;
	int result = EXIT_SUCCESS;
	int i;

	/* bind signals */
	signal(SIGINT, clean_exit);
	signal(SIGTERM, clean_exit);
#ifndef WIN32
	signal(SIGQUIT, clean_exit);
	signal(SIGPIPE, SIG_IGN);
#endif

	/* parse cmdline arguments */
	for (i = 1; i < argc; i++) {
		if (!strcmp(argv[i], "-d") || !strcmp(argv[i], "--debug")) {
			debug_mode = 1;
			idevice_set_debug_level(1);
			socket_set_verbose(3);
			continue;
		}
		else if (!strcmp(argv[i], "-u") || !strcmp(argv[i], "--udid")) {
			i++;
			if (!argv[i] || (strlen(argv[i]) != 40)) {
				print_usage(argc, argv);
				return 0;
			}
			udid = argv[i];
			continue;
		}
		else if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
			print_usage(argc, argv);
			return EXIT_SUCCESS;
		}
		else if (atoi(argv[i]) > 0) {
			local_port = atoi(argv[i]);
			continue;
		}
		else {
			print_usage(argc, argv);
			return EXIT_SUCCESS;
		}
	}

	/* a PORT is mandatory */
	if (!local_port) {
		fprintf(stderr, "Please specify a PORT.\n");
		print_usage(argc, argv);
		goto leave_cleanup;
	}

	/* start services and connect to device */
	ret = idevice_new(&device, udid);
	if (ret != IDEVICE_E_SUCCESS) {
		if (udid) {
			fprintf(stderr, "No device found with udid %s, is it plugged in?\n", udid);
		} else {
			fprintf(stderr, "No device found, is it plugged in?\n");
		}
		result = EXIT_FAILURE;
		goto leave_cleanup;
	}

	if (LOCKDOWN_E_SUCCESS != (ldret = lockdownd_client_new_with_handshake(device, &lockdown, "idevicedebugserverproxy"))) {
		fprintf(stderr, "ERROR: Could not connect to lockdownd, error code %d\n", ldret);
		result = EXIT_FAILURE;
		goto leave_cleanup;
	}

	if ((lockdownd_start_service(lockdown, "com.apple.debugserver", &service) != LOCKDOWN_E_SUCCESS) || !service || !service->port) {
		fprintf(stderr, "Could not start com.apple.debugserver!\nPlease make sure to mount the developer disk image first.\n");
		result = EXIT_FAILURE;
		goto leave_cleanup;
	}

	if (idevice_connect(device, service->port, &connection) != IDEVICE_E_SUCCESS) {
		fprintf(stderr, "Connection to debugserver port %d failed!\n", (int)service->port);
		result = EXIT_FAILURE;
		goto leave_cleanup;
	}

	/* free lockdown connection if running as it is not needed anymore */
	if (lockdown) {
		lockdownd_client_free(lockdown);
		lockdown = NULL;
	}

	/* setup and create socket endpoint */
	socket_info_t socket_info;

	socket_info.device_connection = connection;
	socket_info.local_port = local_port;
	socket_info.remote_port = service->port;

	if (service) {
		lockdownd_service_descriptor_free(service);
		service = NULL;
	}

	/* create local socket */
	socket_info.server_fd = socket_create(socket_info.local_port);
	if (socket_info.server_fd < 0) {
		fprintf(stderr, "Could not create socket\n");
		result = EXIT_FAILURE;
		goto leave_cleanup;
	}

	while (!quit_flag) {
		debug("%s: Waiting for connection on local port %d\n", __func__, socket_info.local_port);

		/* wait for client */
		socket_info.client_fd = socket_accept(socket_info.server_fd, socket_info.local_port);
		if (socket_info.client_fd < 0) {
			debug("%s: Continuing...\n", __func__);
			continue;
		}

		debug("%s: Handling new client connection...\n", __func__);

		if (thread_create(&th, connection_handler, (void*)&socket_info) != 0) {
			fprintf(stderr, "Could not start connection handler.\n");
			socket_shutdown(socket_info.server_fd, SHUT_RDWR);
			socket_close(socket_info.server_fd);
		}
	}

	debug("%s: Shutting down debugserver proxy...\n", __func__);

leave_cleanup:
	if (connection) {
		idevice_disconnect(connection);
	}
	if (lockdown) {
		lockdownd_client_free(lockdown);
	}
	if (device) {
		idevice_free(device);
	}

	return result;
}