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
|
/* simtrace - main program for the host PC
*
* (C) 2010-2011 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#define _GNU_SOURCE
#include <getopt.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <libusb.h>
#include "simtrace.h"
#include "simtrace_usb.h"
#include "apdu_split.h"
#include <osmocom/core/gsmtap.h>
#include <osmocom/core/gsmtap_util.h>
#include <osmocom/core/utils.h>
static struct apdu_split *as;
static struct gsmtap_inst *g_gti;
static int gsmtap_send_sim(const uint8_t *apdu, unsigned int len)
{
struct gsmtap_hdr *gh;
unsigned int gross_len = len + sizeof(*gh);
uint8_t *buf = malloc(gross_len);
int rc;
if (!buf)
return -ENOMEM;
memset(buf, 0, sizeof(*gh));
gh = (struct gsmtap_hdr *) buf;
gh->version = GSMTAP_VERSION;
gh->hdr_len = sizeof(*gh)/4;
gh->type = GSMTAP_TYPE_SIM;
memcpy(buf + sizeof(*gh), apdu, len);
rc = write(gsmtap_inst_fd(g_gti), buf, gross_len);
if (rc < 0) {
perror("write gsmtap");
free(buf);
return rc;
}
free(buf);
return 0;
}
static void apdu_out_cb(uint8_t *buf, unsigned int len, void *user_data)
{
printf("APDU: %s\n", osmo_hexdump(buf, len));
gsmtap_send_sim(buf, len);
}
static int process_usb_msg(uint8_t *buf, int len)
{
struct simtrace_hdr *sh = (struct simtrace_hdr *)buf;
uint8_t *payload = buf += sizeof(*sh);
int payload_len = len - sizeof(*sh);
if (payload_len < 0)
return -EINVAL;
switch (sh->cmd) {
case SIMTRACE_MSGT_DATA:
/* special treatment for ATR */
if (sh->flags & SIMTRACE_FLAG_ATR) {
printf("ATR ");
apdu_out_cb(payload, payload_len, NULL);
break;
}
/* everything else goes into APDU splitter */
apdu_split_in(as, payload, payload_len);
#if 0
/* If waiting time has expired, signal explicit boundary */
if (sh->flags & SIMTRACE_FLAG_WTIME_EXP)
apdu_split_boundary(as);
#endif
break;
case SIMTRACE_MSGT_RESET:
default:
printf("unknown simtrace msg type 0x%02x\n", sh->cmd);
break;
}
}
static void print_welcome(void)
{
printf("simtrace - GSM SIM and smartcard tracing\n"
"(C) 2010 by Harald Welte <laforge@gnumonks.org>\n\n");
}
static void print_help(void)
{
printf( "\t-i\t--gsmtap-ip\tA.B.C.D\n"
"\t-a\t--skip-atr\n"
"\t-h\t--help\n"
"\t-k\t--keep-running\n"
"\n"
);
}
static const struct option opts[] = {
{ "gsmtap-ip", 1, 0, 'i' },
{ "skip-atr", 0, 0, 'a' },
{ "help", 0, 0, 'h' },
{ "keep-running", 0, 0, 'k' },
{ NULL, 0, 0, 0 }
};
static void run_mainloop(struct libusb_device_handle *devh)
{
unsigned int msg_count, byte_count = 0;
char buf[16*265];
int xfer_len;
int rc;
printf("Entering main loop\n");
apdu_split_reset(as);
while (1) {
rc = libusb_bulk_transfer(devh, SIMTRACE_IN_EP, buf, sizeof(buf), &xfer_len, 100000);
if (rc < 0 && rc != LIBUSB_ERROR_TIMEOUT) {
fprintf(stderr, "BULK IN transfer error; rc=%d\n", rc);
return;
}
if (xfer_len > 0) {
//printf("URB: %s\n", osmo_hexdump(buf, rc));
process_usb_msg(buf, xfer_len);
msg_count++;
byte_count += xfer_len;
}
}
}
int main(int argc, char **argv)
{
char *gsmtap_host = "127.0.0.1";
int rc;
int c, ret = 1;
int skip_atr = 0;
int keep_running = 0;
struct libusb_device_handle *devh;
print_welcome();
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "i:ahk", opts, &option_index);
if (c == -1)
break;
switch (c) {
case 'h':
print_help();
exit(0);
break;
case 'i':
gsmtap_host = optarg;
break;
case 'a':
skip_atr = 1;
break;
case 'k':
keep_running = 1;
break;
}
}
rc = libusb_init(NULL);
if (rc < 0) {
fprintf(stderr, "libusb initialization failed\n");
goto close_exit;
}
g_gti = gsmtap_source_init(gsmtap_host, GSMTAP_UDP_PORT, 0);
if (!g_gti) {
perror("unable to open GSMTAP");
goto close_exit;
}
gsmtap_source_add_sink(g_gti);
as = apdu_split_init(&apdu_out_cb, NULL);
if (!as)
goto release_exit;
do {
devh = libusb_open_device_with_vid_pid(NULL, SIMTRACE_USB_VENDOR, SIMTRACE_USB_PRODUCT);
if (!devh) {
fprintf(stderr, "can't open USB device\n");
goto close_exit;
}
rc = libusb_claim_interface(devh, 0);
if (rc < 0) {
fprintf(stderr, "can't claim interface; rc=%d\n", rc);
goto close_exit;
}
run_mainloop(devh);
ret = 0;
libusb_release_interface(devh, 0);
close_exit:
if (devh)
libusb_close(devh);
if (keep_running)
sleep(1);
} while (keep_running);
release_exit:
libusb_exit(NULL);
return ret;
}
|
