1 files changed, 374 insertions, 0 deletions
diff --git a/tools/idevicedebugserverproxy.c b/tools/idevicedebugserverproxy.c
new file mode 100644
index 0000000..4487647
--- /dev/null
+++ b/tools/idevicedebugserverproxy.c
@@ -0,0 +1,374 @@
+/*
+ * 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 "socket.h"
+#include "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 device...\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;
+	idevice_t device = NULL;
+	idevice_connection_t connection = NULL;
+	idevice_error_t ret = IDEVICE_E_UNKNOWN_ERROR;
+	thread_t th;
+	char udid[41];
+	udid[0] = 0;
+	uint16_t port = 0;
+	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;
+			}
+			strcpy(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 */
+	if (udid[0] != 0) {
+		ret = idevice_new(&device, udid);
+		if (ret != IDEVICE_E_SUCCESS) {
+			fprintf(stderr, "No device found with udid %s, is it plugged in?\n", udid);
+			result = EXIT_FAILURE;
+			goto leave_cleanup;
+		}
+	}
+	else
+	{
+		ret = idevice_new(&device, NULL);
+		if (ret != IDEVICE_E_SUCCESS) {
+			fprintf(stderr, "No device found, is it plugged in?\n");
+			result = EXIT_FAILURE;
+			goto leave_cleanup;
+		}
+	}
+
+	if (LOCKDOWN_E_SUCCESS != lockdownd_client_new_with_handshake(device, &lockdown, "idevicedebugserverproxy")) {
+		fprintf(stderr, "Could not connect to lockdownd. Exiting.\n");
+		result = EXIT_FAILURE;
+		goto leave_cleanup;
+	}
+
+	if ((lockdownd_start_service(lockdown, "com.apple.debugserver", &port) != LOCKDOWN_E_SUCCESS) || !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, port, &connection) != IDEVICE_E_SUCCESS) {
+		fprintf(stderr, "Connection to debugserver port %d failed!\n", (int)&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 = port;
+
+	/* 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;
+}