171 lines
4.1 KiB
C
171 lines
4.1 KiB
C
/*
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* BSC NAT Message filtering
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*
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* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010 by on-waves.com
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*
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* All Rights Reserved
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*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <openbsc/debug.h>
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#include <openbsc/gsm_data.h>
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#include <openbsc/bsc_nat.h>
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#include <stdio.h>
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/* test messages for ipa */
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static u_int8_t ipa_id[] = {
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0x00, 0x01, 0xfe, 0x06,
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};
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/* SCCP messages are below */
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static u_int8_t gsm_reset[] = {
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0x00, 0x12, 0xfd,
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0x09, 0x00, 0x03, 0x05, 0x07, 0x02, 0x42, 0xfe,
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0x02, 0x42, 0xfe, 0x06, 0x00, 0x04, 0x30, 0x04,
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0x01, 0x20,
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};
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static const u_int8_t gsm_reset_ack[] = {
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0x00, 0x13, 0xfd,
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0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
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0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x03,
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0x00, 0x01, 0x31,
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};
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static const u_int8_t gsm_paging[] = {
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0x00, 0x20, 0xfd,
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0x09, 0x00, 0x03, 0x07, 0x0b, 0x04, 0x43, 0x01,
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0x00, 0xfe, 0x04, 0x43, 0x5c, 0x00, 0xfe, 0x10,
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0x00, 0x0e, 0x52, 0x08, 0x08, 0x29, 0x47, 0x10,
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0x02, 0x01, 0x31, 0x97, 0x61, 0x1a, 0x01, 0x06,
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};
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/* BSC -> MSC connection open */
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static const u_int8_t bssmap_cr[] = {
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0x00, 0x2c, 0xfd,
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0x01, 0x01, 0x02, 0x03, 0x02, 0x02, 0x04, 0x02,
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0x42, 0xfe, 0x0f, 0x1f, 0x00, 0x1d, 0x57, 0x05,
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0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x12, 0xc3,
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0x50, 0x17, 0x10, 0x05, 0x24, 0x11, 0x03, 0x33,
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0x19, 0xa2, 0x08, 0x29, 0x47, 0x10, 0x02, 0x01,
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0x31, 0x97, 0x61, 0x00
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};
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/* MSC -> BSC connection confirm */
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static const u_int8_t bssmap_cc[] = {
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0x00, 0x0a, 0xfd,
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0x02, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03, 0x02, 0x01, 0x00,
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};
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/* MSC -> BSC released */
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static const u_int8_t bssmap_released[] = {
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0x00, 0x0e, 0xfd,
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0x04, 0x00, 0x00, 0x03, 0x01, 0x02, 0x03, 0x00, 0x01, 0x0f,
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0x02, 0x23, 0x42, 0x00,
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};
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/* BSC -> MSC released */
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static const u_int8_t bssmap_release_complete[] = {
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0x00, 0x07, 0xfd,
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0x05, 0x01, 0x02, 0x03, 0x00, 0x00, 0x03
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};
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struct filter_result {
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const u_int8_t *data;
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const u_int16_t length;
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const int result;
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};
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static const struct filter_result results[] = {
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{
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.data = ipa_id,
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.length = ARRAY_SIZE(ipa_id),
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.result = FILTER_TO_MSC,
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},
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{
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.data = gsm_reset,
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.length = ARRAY_SIZE(gsm_reset),
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.result = FILTER_TO_MSC,
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},
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{
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.data = gsm_reset_ack,
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.length = ARRAY_SIZE(gsm_reset_ack),
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.result = FILTER_TO_BSC,
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},
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{
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.data = gsm_paging,
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.length = ARRAY_SIZE(gsm_paging),
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.result = FILTER_NONE,
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},
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{
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.data = bssmap_cr,
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.length = ARRAY_SIZE(bssmap_cr),
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.result = FILTER_NONE,
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},
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{
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.data = bssmap_cc,
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.length = ARRAY_SIZE(bssmap_cc),
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.result = FILTER_NONE,
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},
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{
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.data = bssmap_released,
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.length = ARRAY_SIZE(bssmap_released),
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.result = FILTER_NONE,
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},
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{
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.data = bssmap_release_complete,
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.length = ARRAY_SIZE(bssmap_release_complete),
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.result = FILTER_NONE,
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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 i;
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/* start testinh with proper messages */
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for (i = 0; i < ARRAY_SIZE(results); ++i) {
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int result;
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struct bsc_nat_parsed *parsed;
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struct msgb *msg = msgb_alloc(4096, "test-message");
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fprintf(stderr, "Going to test item: %d\n", i);
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memcpy(msg->data, results[i].data, results[i].length);
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msg->l2h = msgb_put(msg, results[i].length);
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parsed = bsc_nat_parse(msg);
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if (!parsed) {
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fprintf(stderr, "FAIL: Failed to parse the message\n");
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continue;
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}
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result = bsc_nat_filter_ipa(msg, parsed);
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if (result != results[i].result) {
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fprintf(stderr, "FAIL: Not the expected result got: %d wanted: %d\n",
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result, results[i].result);
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}
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msgb_free(msg);
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}
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return 0;
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}
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