mirror of https://gerrit.osmocom.org/simtrace2
532 lines
13 KiB
C
532 lines
13 KiB
C
/* simtrace2-sniff - main program for the host PC to communicate with the SIMtrace 2 firmware in sniffer mode */
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/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* (C) 2010-2017 by Harald Welte <hwelte@hmw-consulting.de>
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* (C) 2018 by Kevin Redon <kredon@sysmocom.de>
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <signal.h>
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#include <time.h>
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#define _GNU_SOURCE
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#include <getopt.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <libusb.h>
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#include "libusb_util.h"
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#include "simtrace.h"
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#include "simtrace_usb.h"
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#include "simtrace_prot.h"
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#include "simtrace2-discovery.h"
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/gsmtap_util.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/socket.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/sim/class_tables.h>
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#include <osmocom/sim/sim.h>
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/* transport to a SIMtrace device */
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struct st_transport {
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/* USB */
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struct libusb_device_handle *usb_devh;
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struct {
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uint8_t in;
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uint8_t out;
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uint8_t irq_in;
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} usb_ep;
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};
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/* global GSMTAP instance */
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static struct gsmtap_inst *g_gti;
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static int gsmtap_send_sim(const uint8_t *apdu, unsigned int len)
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{
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struct gsmtap_hdr *gh;
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unsigned int gross_len = len + sizeof(*gh);
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uint8_t *buf = malloc(gross_len);
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int rc;
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if (!buf)
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return -ENOMEM;
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memset(buf, 0, sizeof(*gh));
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gh = (struct gsmtap_hdr *) buf;
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gh->version = GSMTAP_VERSION;
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gh->hdr_len = sizeof(*gh)/4;
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gh->type = GSMTAP_TYPE_SIM;
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memcpy(buf + sizeof(*gh), apdu, len);
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rc = write(gsmtap_inst_fd(g_gti), buf, gross_len);
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if (rc < 0) {
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perror("write gsmtap");
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free(buf);
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return rc;
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}
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free(buf);
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return 0;
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}
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static int process_change(const uint8_t *buf, int len)
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{
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/* check if there is enough data for the structure */
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if (len<sizeof(struct sniff_change)) {
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return -1;
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}
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struct sniff_change *change = (struct sniff_change *)buf;
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printf("Card state change: ");
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if (change->flags&SNIFF_CHANGE_FLAG_CARD_INSERT) {
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printf("card inserted ");
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}
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if (change->flags&SNIFF_CHANGE_FLAG_CARD_EJECT) {
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printf("card ejected ");
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}
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if (change->flags&SNIFF_CHANGE_FLAG_RESET_HOLD) {
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printf("reset hold ");
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}
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if (change->flags&SNIFF_CHANGE_FLAG_RESET_RELEASE) {
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printf("reset release ");
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}
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if (change->flags&SNIFF_CHANGE_FLAG_TIMEOUT_WT) {
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printf("data transfer timeout ");
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}
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printf("\n");
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return 0;
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}
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/* Table 7 of ISO 7816-3:2006 */
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static const uint16_t fi_table[] = { 372, 372, 558, 744, 1116, 1488, 1860, 0, 0, 512, 768, 1024, 1536, 2048, 0, 0, };
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/* Table 8 from ISO 7816-3:2006 */
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static const uint8_t di_table[] = { 0, 1, 2, 4, 8, 16, 32, 64, 12, 20, 2, 4, 8, 16, 32, 64, };
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static int process_fidi(const uint8_t *buf, int len)
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{
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/* check if there is enough data for the structure */
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if (len<sizeof(struct sniff_fidi)) {
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return -1;
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}
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struct sniff_fidi *fidi = (struct sniff_fidi *)buf;
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printf("Fi/Di switched to %u/%u\n", fi_table[fidi->fidi>>4], di_table[fidi->fidi&0x0f]);
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return 0;
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}
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static int process_atr(const uint8_t *buf, int len)
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{
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/* check if there is enough data for the structure */
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if (len<sizeof(struct sniff_data)) {
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return -1;
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}
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struct sniff_data *atr = (struct sniff_data *)buf;
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/* check if the data is available */
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if (len<sizeof(struct sniff_data)+atr->length) {
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return -2;
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}
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printf("ATR%s: ", atr->complete ? "" : " (incomplete)");
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for (uint16_t i=0; i<atr->length; i++) {
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printf("%02x ", atr->data[i]);
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}
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printf("\n");
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return 0;
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}
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static int process_pps(const uint8_t *buf, int len)
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{
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/* check if there is enough data for the structure */
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if (len<sizeof(struct sniff_data)) {
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return -1;
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}
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struct sniff_data *pps = (struct sniff_data *)buf;
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/* check if the data is available */
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if (len<sizeof(struct sniff_data)+pps->length) {
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return -2;
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}
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printf("PPS%s: ", pps->complete ? "" : " (incomplete) ");
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for (uint16_t i=0; i<pps->length; i++) {
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printf("%02x ", pps->data[i]);
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}
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printf("\n");
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return 0;
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}
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static int process_tpdu(const uint8_t *buf, int len)
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{
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/* check if there is enough data for the structure */
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if (len<sizeof(struct sniff_data)) {
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return -1;
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}
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struct sniff_data *tpdu = (struct sniff_data *)buf;
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/* check if the data is available */
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if (len<sizeof(struct sniff_data)+tpdu->length) {
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return -2;
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}
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/* print TPDU */
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printf("TPDU%s: ", tpdu->complete ? "" : " (incomplete)");
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for (uint16_t i=0; i<tpdu->length; i++) {
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printf("%02x ", tpdu->data[i]);
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}
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printf("\n");
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/* send TPDU (now considered as APDU) to GSMTAP */
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gsmtap_send_sim(tpdu->data, tpdu->length);
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return 0;
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}
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/*! \brief Process an incoming message from the SIMtrace2 */
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static int process_usb_msg(const uint8_t *buf, int len)
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{
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/* check if enough data for the header is present */
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if (len<sizeof(struct simtrace_msg_hdr)) {
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return 0;
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}
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/* check if message is complete */
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struct simtrace_msg_hdr *msg_hdr = (struct simtrace_msg_hdr *)buf;
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if (len<msg_hdr->msg_len) {
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return 0;
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}
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//printf("msg: %s\n", osmo_hexdump(buf, msg_hdr->msg_len));
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/* check for message class */
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if (SIMTRACE_MSGC_SNIFF!=msg_hdr->msg_class) { /* we only care about sniffing messages */
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return msg_hdr->msg_len; /* discard non-sniffing messaged */
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}
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/* process sniff message payload */
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buf += sizeof(struct simtrace_msg_hdr);
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len -= sizeof(struct simtrace_msg_hdr);
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switch (msg_hdr->msg_type) {
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case SIMTRACE_MSGT_SNIFF_CHANGE:
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process_change(buf, len);
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break;
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case SIMTRACE_MSGT_SNIFF_FIDI:
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process_fidi(buf, len);
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break;
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case SIMTRACE_MSGT_SNIFF_ATR:
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process_atr(buf, len);
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break;
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case SIMTRACE_MSGT_SNIFF_PPS:
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process_pps(buf, len);
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break;
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case SIMTRACE_MSGT_SNIFF_TPDU:
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process_tpdu(buf, len);
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break;
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default:
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printf("unknown SIMtrace msg type 0x%02x\n", msg_hdr->msg_type);
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break;
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}
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return msg_hdr->msg_len;
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}
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/*! Transport to SIMtrace device (e.g. USB handle) */
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static struct st_transport _transp;
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static void run_mainloop()
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{
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int rc;
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uint8_t buf[16*256];
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unsigned int buf_i = 0;
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int xfer_len;
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printf("Entering main loop\n");
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while (true) {
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/* read data from SIMtrace2 device (via USB) */
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rc = libusb_bulk_transfer(_transp.usb_devh, _transp.usb_ep.in,
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&buf[buf_i], sizeof(buf)-buf_i, &xfer_len, 100000);
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if (rc < 0 && rc != LIBUSB_ERROR_TIMEOUT &&
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rc != LIBUSB_ERROR_INTERRUPTED &&
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rc != LIBUSB_ERROR_IO) {
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fprintf(stderr, "BULK IN transfer error; rc=%d\n", rc);
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return;
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}
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/* dispatch any incoming data */
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if (xfer_len > 0) {
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//printf("URB: %s\n", osmo_hexdump(&buf[buf_i], xfer_len));
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buf_i += xfer_len;
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if (buf_i>=sizeof(buf)) {
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perror("preventing USB buffer overflow");
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return;
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}
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int processed = process_usb_msg(buf, buf_i);
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if (processed>0 && processed<=buf_i) {
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for (unsigned int i=processed; i<buf_i; i++) {
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buf[i-processed] = buf[i];
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}
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buf_i -= processed;
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}
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}
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}
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}
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static void print_welcome(void)
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{
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printf("simtrace2-sniff - Phone-SIM card communication sniffer \n"
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"(C) 2010-2017 by Harald Welte <laforge@gnumonks.org>\n"
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"(C) 2018 by Kevin Redon <kredon@sysmocom.de>\n"
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"\n"
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);
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}
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static void print_help(void)
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{
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printf(
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"\t-h\t--help\n"
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"\t-i\t--gsmtap-ip\tA.B.C.D\n"
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"\t-k\t--keep-running\n"
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"\t-V\t--usb-vendor\tVENDOR_ID\n"
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"\t-P\t--usb-product\tPRODUCT_ID\n"
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"\t-C\t--usb-config\tCONFIG_ID\n"
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"\t-I\t--usb-interface\tINTERFACE_ID\n"
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"\t-S\t--usb-altsetting ALTSETTING_ID\n"
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"\t-A\t--usb-address\tADDRESS\n"
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"\n"
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);
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}
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static const struct option opts[] = {
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{ "help", 0, 0, 'h' },
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{ "gsmtap-ip", 1, 0, 'i' },
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{ "keep-running", 0, 0, 'k' },
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{ "usb-vendor", 1, 0, 'V' },
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{ "usb-product", 1, 0, 'P' },
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{ "usb-config", 1, 0, 'C' },
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{ "usb-interface", 1, 0, 'I' },
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{ "usb-altsetting", 1, 0, 'S' },
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{ "usb-address", 1, 0, 'A' },
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{ NULL, 0, 0, 0 }
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};
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/* Known USB device with SIMtrace firmware supporting sniffer */
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static const struct dev_id compatible_dev_ids[] = {
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{ USB_VENDOR_OPENMOKO, USB_PRODUCT_SIMTRACE2 },
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{ 0, 0 }
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};
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static void signal_handler(int signal)
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{
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switch (signal) {
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case SIGINT:
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exit(0);
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break;
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default:
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break;
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}
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}
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int main(int argc, char **argv)
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{
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int rc, ret;
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print_welcome();
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/* Parse arguments */
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char *gsmtap_host = "127.0.0.1";
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int keep_running = 0;
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int vendor_id = -1, product_id = -1, addr = -1, config_id = -1, if_num = -1, altsetting = -1;
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while (1) {
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int option_index = 0;
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char c = getopt_long(argc, argv, "hi:kV:P:C:I:S:A:", opts, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_help();
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exit(0);
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break;
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case 'i':
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gsmtap_host = optarg;
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break;
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case 'k':
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keep_running = 1;
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break;
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case 'V':
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vendor_id = strtol(optarg, NULL, 16);
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break;
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case 'P':
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product_id = strtol(optarg, NULL, 16);
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break;
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case 'C':
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config_id = atoi(optarg);
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break;
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case 'I':
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if_num = atoi(optarg);
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break;
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case 'S':
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altsetting = atoi(optarg);
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break;
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case 'A':
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addr = atoi(optarg);
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break;
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}
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}
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/* Scan for available SIMtrace USB devices supporting sniffing */
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rc = libusb_init(NULL);
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if (rc < 0) {
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fprintf(stderr, "libusb initialization failed\n");
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goto do_exit;
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}
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struct usb_interface_match ifm_scan[16];
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int num_interfaces = usb_match_interfaces(NULL, compatible_dev_ids,
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USB_CLASS_PROPRIETARY, SIMTRACE_SNIFFER_USB_SUBCLASS, -1, ifm_scan, ARRAY_SIZE(ifm_scan));
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if (num_interfaces <= 0) {
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perror("No compatible USB devices found");
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goto do_exit;
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}
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/* Only keep USB matching arguments */
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struct usb_interface_match ifm_filtered[ARRAY_SIZE(ifm_scan)];
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int num_filtered = 0;
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for (unsigned int i = 0; i < num_interfaces; i++) {
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if (vendor_id>=0 && vendor_id!=ifm_scan[i].vendor) {
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continue;
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}
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if (product_id>=0 && product_id!=ifm_scan[i].product) {
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continue;
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}
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if (config_id>=0 && config_id!=ifm_scan[i].configuration) {
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continue;
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}
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if (if_num>=0 && if_num!=ifm_scan[i].interface) {
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continue;
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}
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if (altsetting>=0 && altsetting!=ifm_scan[i].altsetting) {
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continue;
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}
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if (addr>=0 && addr!=ifm_scan[i].addr) {
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continue;
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}
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ifm_filtered[num_filtered++] = ifm_scan[i];
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}
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if (1!=num_filtered) {
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perror("No individual matching USB devices found");
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printf("Available USB devices:\n");
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for (unsigned int i = 0; i < num_interfaces; i++) {
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printf("\t%04x:%04x Addr=%u, Path=%s, Cfg=%u, Intf=%u, Alt=%u: %d/%d/%d ",
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ifm_scan[i].vendor, ifm_scan[i].product, ifm_scan[i].addr, ifm_scan[i].path,
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ifm_scan[i].configuration, ifm_scan[i].interface, ifm_scan[i].altsetting,
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ifm_scan[i].class, ifm_scan[i].sub_class, ifm_scan[i].protocol);
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libusb_device_handle *dev_handle;
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rc = libusb_open(ifm_scan[i].usb_dev, &dev_handle);
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if (rc < 0) {
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printf("\n");
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perror("Cannot open device");
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continue;
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}
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char strbuf[256];
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rc = libusb_get_string_descriptor_ascii(dev_handle, ifm_scan[i].string_idx,
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(unsigned char *)strbuf, sizeof(strbuf));
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libusb_close(dev_handle);
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if (rc < 0) {
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printf("\n");
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perror("Cannot read string");
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continue;
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}
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printf("(%s)\n", strbuf);
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}
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goto do_exit;
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}
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struct usb_interface_match ifm_selected = ifm_filtered[0];
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printf("Using USB device %04x:%04x Addr=%u, Path=%s, Cfg=%u, Intf=%u, Alt=%u: %d/%d/%d ",
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ifm_selected.vendor, ifm_selected.product, ifm_selected.addr, ifm_selected.path,
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ifm_selected.configuration, ifm_selected.interface, ifm_selected.altsetting,
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ifm_selected.class, ifm_selected.sub_class, ifm_selected.protocol);
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libusb_device_handle *dev_handle;
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rc = libusb_open(ifm_selected.usb_dev, &dev_handle);
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if (rc < 0) {
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printf("\n");
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perror("Cannot open device");
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}
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char strbuf[256];
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rc = libusb_get_string_descriptor_ascii(dev_handle, ifm_selected.string_idx,
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(unsigned char *)strbuf, sizeof(strbuf));
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libusb_close(dev_handle);
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if (rc < 0) {
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printf("\n");
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perror("Cannot read string");
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}
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printf("(%s)\n", strbuf);
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g_gti = gsmtap_source_init(gsmtap_host, GSMTAP_UDP_PORT, 0);
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if (!g_gti) {
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perror("unable to open GSMTAP");
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goto close_exit;
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}
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gsmtap_source_add_sink(g_gti);
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signal(SIGINT, &signal_handler);
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do {
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_transp.usb_devh = usb_open_claim_interface(NULL, &ifm_selected);
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|
if (!_transp.usb_devh) {
|
|
fprintf(stderr, "can't open USB device\n");
|
|
goto close_exit;
|
|
}
|
|
|
|
rc = libusb_claim_interface(_transp.usb_devh, ifm_selected.interface);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "can't claim interface %d; rc=%d\n", ifm_selected.interface, rc);
|
|
goto close_exit;
|
|
}
|
|
|
|
rc = get_usb_ep_addrs(_transp.usb_devh, ifm_selected.interface, &_transp.usb_ep.out,
|
|
&_transp.usb_ep.in, &_transp.usb_ep.irq_in);
|
|
if (rc < 0) {
|
|
fprintf(stderr, "can't obtain EP addrs; rc=%d\n", rc);
|
|
goto close_exit;
|
|
}
|
|
|
|
run_mainloop();
|
|
ret = 0;
|
|
|
|
if (_transp.usb_devh)
|
|
libusb_release_interface(_transp.usb_devh, 0);
|
|
close_exit:
|
|
if (_transp.usb_devh)
|
|
libusb_close(_transp.usb_devh);
|
|
if (keep_running)
|
|
sleep(1);
|
|
} while (keep_running);
|
|
|
|
libusb_exit(NULL);
|
|
do_exit:
|
|
return ret;
|
|
}
|