summaryrefslogtreecommitdiffstats
path: root/src/property_list_service.c
blob: f0fc8302a087ccf27a5b6eecd5794852017e9571 (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
/*
 * property_list_service.c
 * PropertyList service implementation.
 *
 * Copyright (c) 2010 Nikias Bassen. 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
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>

#include "property_list_service.h"
#include "common/debug.h"
#include "endianness.h"

/**
 * Convert a service_error_t value to a property_list_service_error_t value.
 * Used internally to get correct error codes.
 *
 * @param err A service_error_t error code
 *
 * @return A matching property_list_service_error_t error code,
 *     PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR otherwise.
 */
static property_list_service_error_t service_to_property_list_service_error(service_error_t err)
{
	switch (err) {
		case SERVICE_E_SUCCESS:
			return PROPERTY_LIST_SERVICE_E_SUCCESS;
		case SERVICE_E_INVALID_ARG:
			return PROPERTY_LIST_SERVICE_E_INVALID_ARG;
		case SERVICE_E_MUX_ERROR:
			return PROPERTY_LIST_SERVICE_E_MUX_ERROR;
		case SERVICE_E_SSL_ERROR:
			return PROPERTY_LIST_SERVICE_E_SSL_ERROR;
		case SERVICE_E_NOT_ENOUGH_DATA:
			return PROPERTY_LIST_SERVICE_E_NOT_ENOUGH_DATA;
		case SERVICE_E_TIMEOUT:
			return PROPERTY_LIST_SERVICE_E_RECEIVE_TIMEOUT;
		default:
			break;
	}
	return PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR;
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_client_new(idevice_t device, lockdownd_service_descriptor_t service, property_list_service_client_t *client)
{
	if (!device || !service || service->port == 0 || !client || *client)
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;

	service_client_t parent = NULL;
	service_error_t rerr = service_client_new(device, service, &parent);
	if (rerr != SERVICE_E_SUCCESS) {
		return service_to_property_list_service_error(rerr);
	}

	/* create client object */
	property_list_service_client_t client_loc = (property_list_service_client_t)malloc(sizeof(struct property_list_service_client_private));
	client_loc->parent = parent;

	/* all done, return success */
	*client = client_loc;
	return PROPERTY_LIST_SERVICE_E_SUCCESS;
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_client_free(property_list_service_client_t client)
{
	if (!client)
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;

	property_list_service_error_t err = service_to_property_list_service_error(service_client_free(client->parent));

	free(client);
	client = NULL;

	return err;
}

/**
 * Sends a plist using the given property list service client.
 * Internally used generic plist send function.
 *
 * @param client The property list service client to use for sending.
 * @param plist plist to send
 * @param binary 1 = send binary plist, 0 = send xml plist
 *
 * @return PROPERTY_LIST_SERVICE_E_SUCCESS on success,
 *      PROPERTY_LIST_SERVICE_E_INVALID_ARG when one or more parameters are
 *      invalid, PROPERTY_LIST_SERVICE_E_PLIST_ERROR when dict is not a valid
 *      plist, PROPERTY_LIST_SERVICE_E_MUX_ERROR when a communication error
 *      occurs, or PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR when an unspecified
 *      error occurs.
 */
static property_list_service_error_t internal_plist_send(property_list_service_client_t client, plist_t plist, int binary)
{
	property_list_service_error_t res = PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR;
	char *content = NULL;
	uint32_t length = 0;
	uint32_t nlen = 0;
	uint32_t bytes = 0;

	if (!client || (client && !client->parent) || !plist) {
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;
	}

	if (binary) {
		plist_to_bin(plist, &content, &length);
	} else {
		plist_to_xml(plist, &content, &length);
	}

	if (!content || length == 0) {
		return PROPERTY_LIST_SERVICE_E_PLIST_ERROR;
	}

	nlen = htobe32(length);
	debug_info("sending %d bytes", length);
	service_send(client->parent, (const char*)&nlen, sizeof(nlen), &bytes);
	if (bytes == sizeof(nlen)) {
		service_send(client->parent, content, length, &bytes);
		if (bytes > 0) {
			debug_info("sent %d bytes", bytes);
			debug_plist(plist);
			if (bytes == length) {
				res = PROPERTY_LIST_SERVICE_E_SUCCESS;
			} else {
				debug_info("ERROR: Could not send all data (%d of %d)!", bytes, length);
			}
		}
	}
	if (bytes <= 0) {
		debug_info("ERROR: sending to device failed.");
		res = PROPERTY_LIST_SERVICE_E_MUX_ERROR;
	}

	free(content);
	return res;
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_send_xml_plist(property_list_service_client_t client, plist_t plist)
{
	return internal_plist_send(client, plist, 0);
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_send_binary_plist(property_list_service_client_t client, plist_t plist)
{
	return internal_plist_send(client, plist, 1);
}

/**
 * Receives a plist using the given property list service client.
 * Internally used generic plist receive function.
 *
 * @param client The property list service client to use for receiving
 * @param plist pointer to a plist_t that will point to the received plist
 *      upon successful return
 * @param timeout Maximum time in milliseconds to wait for data.
 *
 * @return PROPERTY_LIST_SERVICE_E_SUCCESS on success,
 *      PROPERTY_LIST_SERVICE_E_INVALID_ARG when client or *plist is NULL,
 *      PROPERTY_LIST_SERVICE_E_NOT_ENOUGH_DATA when not enough data
 *      received, PROPERTY_LIST_SERVICE_E_RECEIVE_TIMEOUT when the connection times out,
 *      PROPERTY_LIST_SERVICE_E_PLIST_ERROR when the received data cannot be
 *      converted to a plist, PROPERTY_LIST_SERVICE_E_MUX_ERROR when a
 *      communication error occurs, or PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR
 *      when an unspecified error occurs.
 */
static property_list_service_error_t internal_plist_receive_timeout(property_list_service_client_t client, plist_t *plist, unsigned int timeout)
{
	property_list_service_error_t res = PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR;
	uint32_t pktlen = 0;
	uint32_t bytes = 0;

	if (!client || (client && !client->parent) || !plist) {
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;
	}

	*plist = NULL;
	service_error_t serr = service_receive_with_timeout(client->parent, (char*)&pktlen, sizeof(pktlen), &bytes, timeout);
	if (serr != SERVICE_E_SUCCESS) {
		debug_info("initial read failed!");
		return service_to_property_list_service_error(serr);
	}

	if (bytes == 0) {
		/* success but 0 bytes length, assume timeout */
		return PROPERTY_LIST_SERVICE_E_RECEIVE_TIMEOUT;
	}

	debug_info("initial read=%i", bytes);

	uint32_t curlen = 0;
	char *content = NULL;

	pktlen = be32toh(pktlen);
	debug_info("%d bytes following", pktlen);
	content = (char*)malloc(pktlen);
	if (!content) {
		debug_info("out of memory when allocating %d bytes", pktlen);
		return PROPERTY_LIST_SERVICE_E_UNKNOWN_ERROR;
	}

	while (curlen < pktlen) {
		serr = service_receive(client->parent, content+curlen, pktlen-curlen, &bytes);
		if (serr != SERVICE_E_SUCCESS) {
			res = service_to_property_list_service_error(serr);
			break;
		}
		debug_info("received %d bytes", bytes);
		curlen += bytes;
	}
	if (curlen < pktlen) {
		debug_info("received incomplete packet (%d of %d bytes)", curlen, pktlen);
		if (curlen > 0) {
			debug_info("incomplete packet following:");
			debug_buffer(content, curlen);
		}
		free(content);
		return res;
	}
	if ((pktlen > 8) && !memcmp(content, "bplist00", 8)) {
		plist_from_bin(content, pktlen, plist);
	} else if ((pktlen > 5) && !memcmp(content, "<?xml", 5)) {
		/* iOS 4.3+ hack: plist data might contain invalid characters, thus we convert those to spaces */
		for (bytes = 0; bytes < pktlen-1; bytes++) {
			if ((content[bytes] >= 0) && (content[bytes] < 0x20) && (content[bytes] != 0x09) && (content[bytes] != 0x0a) && (content[bytes] != 0x0d))
				content[bytes] = 0x20;
		}
		plist_from_xml(content, pktlen, plist);
	} else {
		debug_info("WARNING: received unexpected non-plist content");
		debug_buffer(content, pktlen);
	}
	if (*plist) {
		debug_plist(*plist);
		res = PROPERTY_LIST_SERVICE_E_SUCCESS;
	} else {
		res = PROPERTY_LIST_SERVICE_E_PLIST_ERROR;
	}
	free(content);
	content = NULL;
	
	return res;
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_receive_plist_with_timeout(property_list_service_client_t client, plist_t *plist, unsigned int timeout)
{
	return internal_plist_receive_timeout(client, plist, timeout);
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_receive_plist(property_list_service_client_t client, plist_t *plist)
{
	return internal_plist_receive_timeout(client, plist, 30000);
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_enable_ssl(property_list_service_client_t client)
{
	if (!client || !client->parent)
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;
	return service_to_property_list_service_error(service_enable_ssl(client->parent));
}

LIBIMOBILEDEVICE_API property_list_service_error_t property_list_service_disable_ssl(property_list_service_client_t client)
{
	if (!client || !client->parent)
		return PROPERTY_LIST_SERVICE_E_INVALID_ARG;
	return service_to_property_list_service_error(service_disable_ssl(client->parent));
}