1252 lines
30 KiB
C
1252 lines
30 KiB
C
/*
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* BSC NAT Message filtering
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*
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* (C) 2010-2012 by Holger Hans Peter Freyther <zecke@selfish.org>
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* (C) 2010-2012 by On-Waves
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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 Affero General Public License as published by
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* the Free Software Foundation; either version 3 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 Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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 <openbsc/bsc_nat_sccp.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/sccp/sccp.h>
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#include <osmocom/gsm/protocol/gsm_08_08.h>
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#include <stdio.h>
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/* test messages for ipa */
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static uint8_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 uint8_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 uint8_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 uint8_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 uint8_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 uint8_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 uint8_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 uint8_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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/* both directions IT timer */
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static const uint8_t connnection_it[] = {
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0x00, 0x0b, 0xfd,
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0x10, 0x01, 0x02, 0x03, 0x01, 0x02, 0x03,
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0x00, 0x00, 0x00, 0x00,
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};
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/* error in both directions */
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static const uint8_t proto_error[] = {
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0x00, 0x05, 0xfd,
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0x0f, 0x22, 0x33, 0x44, 0x00,
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};
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/* MGCP wrap... */
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static const uint8_t mgcp_msg[] = {
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0x00, 0x03, 0xfc,
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0x20, 0x20, 0x20,
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};
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/* location updating request */
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static const uint8_t bss_lu[] = {
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0x00, 0x2e, 0xfd,
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0x01, 0x91, 0x45, 0x14, 0x02, 0x02, 0x04, 0x02,
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0x42, 0xfe, 0x0f, 0x21, 0x00, 0x1f, 0x57, 0x05,
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0x08, 0x00, 0x72, 0xf4, 0x80, 0x20, 0x14, 0xc3,
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0x50, 0x17, 0x12, 0x05, 0x08, 0x70, 0x72, 0xf4,
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0x80, 0xff, 0xfe, 0x30, 0x08, 0x29, 0x44, 0x50,
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0x12, 0x03, 0x24, 0x01, 0x95, 0x00
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};
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/* paging response */
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static const uint8_t pag_resp[] = {
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0x00, 0x2c, 0xfd, 0x01, 0xe5, 0x68,
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0x14, 0x02, 0x02, 0x04, 0x02, 0x42, 0xfe, 0x0f,
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0x1f, 0x00, 0x1d, 0x57, 0x05, 0x08, 0x00, 0x72,
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0xf4, 0x80, 0x20, 0x16, 0xc3, 0x50, 0x17, 0x10,
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0x06, 0x27, 0x01, 0x03, 0x30, 0x18, 0x96, 0x08,
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0x29, 0x26, 0x30, 0x32, 0x11, 0x42, 0x01, 0x19,
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0x00
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};
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struct filter_result {
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const uint8_t *data;
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const uint16_t length;
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const int dir;
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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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.dir = DIR_MSC,
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.result = 1,
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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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.dir = DIR_MSC,
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.result = 1,
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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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.dir = DIR_BSC,
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.result = 1,
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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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.dir = DIR_BSC,
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.result = 0,
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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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.dir = DIR_MSC,
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.result = 0,
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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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.dir = DIR_BSC,
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.result = 0,
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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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.dir = DIR_MSC,
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.result = 0,
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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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.dir = DIR_BSC,
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.result = 0,
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},
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{
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.data = mgcp_msg,
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.length = ARRAY_SIZE(mgcp_msg),
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.dir = DIR_MSC,
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.result = 0,
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},
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{
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.data = connnection_it,
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.length = ARRAY_SIZE(connnection_it),
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.dir = DIR_BSC,
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.result = 0,
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},
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{
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.data = connnection_it,
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.length = ARRAY_SIZE(connnection_it),
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.dir = DIR_MSC,
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.result = 0,
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},
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{
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.data = proto_error,
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.length = ARRAY_SIZE(proto_error),
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.dir = DIR_BSC,
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.result = 0,
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},
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{
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.data = proto_error,
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.length = ARRAY_SIZE(proto_error),
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.dir = DIR_MSC,
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.result = 0,
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},
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};
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static void test_filter(void)
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{
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int i;
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/* start testinh with proper messages */
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printf("Testing BSS Filtering.\n");
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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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printf("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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printf("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(results[i].dir, msg, parsed);
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if (result != results[i].result) {
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printf("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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}
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#include "bsc_data.c"
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static void copy_to_msg(struct msgb *msg, const uint8_t *data, unsigned int length)
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{
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msgb_reset(msg);
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msg->l2h = msgb_put(msg, length);
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memcpy(msg->l2h, data, msgb_l2len(msg));
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}
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static void verify_msg(struct msgb *out, const uint8_t *ref, int ref_len)
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{
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if (out->len != ref_len) {
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printf("FAIL: The size should match: %d vs. %d\n",
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out->len, ref_len);
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printf("%s\n", osmo_hexdump(out->data, out->len));
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printf("Wanted\n");
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printf("%s\n", osmo_hexdump(ref, ref_len));
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abort();
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}
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if (memcmp(out->data, ref, out->len) != 0) {
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printf("FAIL: the data should be changed.\n");
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printf("%s\n", osmo_hexdump(out->data, out->len));
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printf("Wanted\n");
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printf("%s\n", osmo_hexdump(ref, ref_len));
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abort();
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}
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}
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#define VERIFY(con_found, con, msg, ver, str) \
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if (!con_found) { \
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printf("Failed to find connection.\n"); \
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abort(); \
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} \
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if (con_found->bsc != con) { \
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printf("Got connection of the wrong BSC: %d\n", \
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con_found->bsc->cfg->nr); \
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abort(); \
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} \
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if (memcmp(msg->data, ver, sizeof(ver)) != 0) { \
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printf("Failed to patch the %s msg.\n", str); \
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abort(); \
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}
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/* test conn tracking once */
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static void test_contrack()
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{
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struct bsc_nat *nat;
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struct bsc_connection *con;
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struct sccp_connections *con_found;
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struct sccp_connections *rc_con;
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struct bsc_nat_parsed *parsed;
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struct msgb *msg;
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printf("Testing connection tracking.\n");
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nat = bsc_nat_alloc();
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con = bsc_connection_alloc(nat);
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con->cfg = bsc_config_alloc(nat, "foo");
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bsc_config_add_lac(con->cfg, 23);
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bsc_config_add_lac(con->cfg, 49);
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bsc_config_add_lac(con->cfg, 42);
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bsc_config_del_lac(con->cfg, 49);
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bsc_config_add_lac(con->cfg, 1111);
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msg = msgb_alloc(4096, "test");
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/* 1.) create a connection */
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copy_to_msg(msg, bsc_cr, sizeof(bsc_cr));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
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if (con_found != NULL) {
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printf("Con should not exist realref(%u)\n",
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sccp_src_ref_to_int(&con_found->real_ref));
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abort();
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}
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rc_con = create_sccp_src_ref(con, parsed);
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if (!rc_con) {
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printf("Failed to create a ref\n");
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abort();
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}
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con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
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if (!con_found) {
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printf("Failed to find connection.\n");
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abort();
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}
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if (con_found->bsc != con) {
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printf("Got connection of the wrong BSC: %d\n",
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con_found->bsc->cfg->nr);
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abort();
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}
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if (con_found != rc_con) {
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printf("Failed to find the right connection.\n");
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abort();
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}
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if (memcmp(msg->data, bsc_cr_patched, sizeof(bsc_cr_patched)) != 0) {
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printf("Failed to patch the BSC CR msg.\n");
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abort();
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}
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talloc_free(parsed);
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/* 2.) get the cc */
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copy_to_msg(msg, msc_cc, sizeof(msc_cc));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
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VERIFY(con_found, con, msg, msc_cc_patched, "MSC CC");
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if (update_sccp_src_ref(con_found, parsed) != 0) {
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printf("Failed to update the SCCP con.\n");
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abort();
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}
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/* 3.) send some data */
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copy_to_msg(msg, bsc_dtap, sizeof(bsc_dtap));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
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VERIFY(con_found, con, msg, bsc_dtap_patched, "BSC DTAP");
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/* 4.) receive some data */
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copy_to_msg(msg, msc_dtap, sizeof(msc_dtap));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
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VERIFY(con_found, con, msg, msc_dtap_patched, "MSC DTAP");
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/* 5.) close the connection */
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copy_to_msg(msg, msc_rlsd, sizeof(msc_rlsd));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_bsc(msg, parsed, nat);
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VERIFY(con_found, con, msg, msc_rlsd_patched, "MSC RLSD");
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/* 6.) confirm the connection close */
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copy_to_msg(msg, bsc_rlc, sizeof(bsc_rlc));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
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if (!con_found) {
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printf("Failed to find connection.\n");
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abort();
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}
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if (con_found->bsc != con) {
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printf("Got connection of the wrong BSC: %d\n",
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con_found->bsc->cfg->nr);
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abort();
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}
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if (memcmp(msg->data, bsc_rlc_patched, sizeof(bsc_rlc_patched)) != 0) {
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printf("Failed to patch the BSC CR msg.\n");
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abort();
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}
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remove_sccp_src_ref(con, msg, parsed);
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talloc_free(parsed);
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copy_to_msg(msg, bsc_rlc, sizeof(bsc_rlc));
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parsed = bsc_nat_parse(msg);
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con_found = patch_sccp_src_ref_to_msc(msg, parsed, con);
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/* verify that it is gone */
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if (con_found != NULL) {
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printf("Con should not exist real_ref(%u)\n",
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sccp_src_ref_to_int(&con_found->real_ref));
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abort();
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}
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talloc_free(parsed);
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bsc_config_free(con->cfg);
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talloc_free(nat);
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msgb_free(msg);
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}
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static void test_paging(void)
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{
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struct bsc_nat *nat;
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struct bsc_connection *con;
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struct bsc_config *cfg;
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printf("Testing paging by lac.\n");
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nat = bsc_nat_alloc();
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con = bsc_connection_alloc(nat);
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cfg = bsc_config_alloc(nat, "unknown");
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con->cfg = cfg;
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bsc_config_add_lac(cfg, 23);
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con->authenticated = 1;
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llist_add(&con->list_entry, &nat->bsc_connections);
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/* Test it by not finding it */
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if (bsc_config_handles_lac(cfg, 8213) != 0) {
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printf("Should not be handled.\n");
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abort();
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}
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/* Test by finding it */
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bsc_config_del_lac(cfg, 23);
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bsc_config_add_lac(cfg, 8213);
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if (bsc_config_handles_lac(cfg, 8213) == 0) {
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printf("Should have found it.\n");
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abort();
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}
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}
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static void test_mgcp_allocations(void)
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{
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#if 0
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struct bsc_connection *bsc;
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struct bsc_nat *nat;
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struct sccp_connections con;
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int i, j, multiplex;
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printf("Testing MGCP.\n");
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memset(&con, 0, sizeof(con));
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nat = bsc_nat_alloc();
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|
nat->bsc_endpoints = talloc_zero_array(nat,
|
|
struct bsc_endpoint,
|
|
65);
|
|
nat->mgcp_cfg = mgcp_config_alloc();
|
|
nat->mgcp_cfg->trunk.number_endpoints = 64;
|
|
|
|
bsc = bsc_connection_alloc(nat);
|
|
bsc->cfg = bsc_config_alloc(nat, "foo");
|
|
bsc->cfg->max_endpoints = 60;
|
|
bsc_config_add_lac(bsc->cfg, 2323);
|
|
bsc->last_endpoint = 0x22;
|
|
con.bsc = bsc;
|
|
|
|
bsc_init_endps_if_needed(bsc);
|
|
|
|
i = 1;
|
|
do {
|
|
if (bsc_assign_endpoint(bsc, &con) != 0) {
|
|
printf("failed to allocate... on iteration %d\n", i);
|
|
break;
|
|
}
|
|
++i;
|
|
} while(1);
|
|
|
|
multiplex = bsc_mgcp_nr_multiplexes(bsc->cfg->max_endpoints);
|
|
for (i = 0; i < multiplex; ++i) {
|
|
for (j = 0; j < 32; ++j)
|
|
printf("%d", bsc->_endpoint_status[i*32 + j]);
|
|
printf(": %d of %d\n", i*32 + 32, 32 * 8);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void test_mgcp_ass_tracking(void)
|
|
{
|
|
struct bsc_connection *bsc;
|
|
struct bsc_nat *nat;
|
|
struct sccp_connections con;
|
|
struct bsc_nat_parsed *parsed;
|
|
struct msgb *msg;
|
|
|
|
printf("Testing MGCP.\n");
|
|
memset(&con, 0, sizeof(con));
|
|
|
|
nat = bsc_nat_alloc();
|
|
nat->bsc_endpoints = talloc_zero_array(nat,
|
|
struct bsc_endpoint,
|
|
33);
|
|
nat->mgcp_cfg = mgcp_config_alloc();
|
|
nat->mgcp_cfg->trunk.number_endpoints = 64;
|
|
mgcp_endpoints_allocate(&nat->mgcp_cfg->trunk);
|
|
|
|
bsc = bsc_connection_alloc(nat);
|
|
bsc->cfg = bsc_config_alloc(nat, "foo");
|
|
bsc_config_add_lac(bsc->cfg, 2323);
|
|
bsc->last_endpoint = 0x1e;
|
|
con.bsc = bsc;
|
|
|
|
msg = msgb_alloc(4096, "foo");
|
|
copy_to_msg(msg, ass_cmd, sizeof(ass_cmd));
|
|
parsed = bsc_nat_parse(msg);
|
|
|
|
if (msg->l2h[16] != 0 ||
|
|
msg->l2h[17] != 0x1) {
|
|
printf("Input is not as expected.. %s 0x%x\n",
|
|
osmo_hexdump(msg->l2h, msgb_l2len(msg)),
|
|
msg->l2h[17]);
|
|
abort();
|
|
}
|
|
|
|
if (bsc_mgcp_assign_patch(&con, msg) != 0) {
|
|
printf("Failed to handle assignment.\n");
|
|
abort();
|
|
}
|
|
|
|
if (con.msc_endp != 1) {
|
|
printf("Timeslot should be 1.\n");
|
|
abort();
|
|
}
|
|
|
|
if (con.bsc_endp != 0x1) {
|
|
printf("Assigned timeslot should have been 1.\n");
|
|
abort();
|
|
}
|
|
if (con.bsc->_endpoint_status[0x1] != 1) {
|
|
printf("The status on the BSC is wrong.\n");
|
|
abort();
|
|
}
|
|
|
|
int multiplex, timeslot;
|
|
mgcp_endpoint_to_timeslot(0x1, &multiplex, ×lot);
|
|
|
|
uint16_t cic = htons(timeslot & 0x1f);
|
|
if (memcmp(&cic, &msg->l2h[16], sizeof(cic)) != 0) {
|
|
printf("Message was not patched properly\n");
|
|
printf("data cic: 0x%x %s\n", cic, osmo_hexdump(msg->l2h, msgb_l2len(msg)));
|
|
abort();
|
|
}
|
|
|
|
talloc_free(parsed);
|
|
|
|
bsc_mgcp_dlcx(&con);
|
|
if (con.bsc_endp != -1 || con.msc_endp != -1 ||
|
|
con.bsc->_endpoint_status[1] != 0 || con.bsc->last_endpoint != 0x1) {
|
|
printf("Clearing should remove the mapping.\n");
|
|
abort();
|
|
}
|
|
|
|
bsc_config_free(bsc->cfg);
|
|
talloc_free(nat);
|
|
}
|
|
|
|
/* test the code to find a given connection */
|
|
static void test_mgcp_find(void)
|
|
{
|
|
struct bsc_nat *nat;
|
|
struct bsc_connection *con;
|
|
struct sccp_connections *sccp_con;
|
|
|
|
printf("Testing finding of a BSC Connection\n");
|
|
|
|
nat = bsc_nat_alloc();
|
|
con = bsc_connection_alloc(nat);
|
|
llist_add(&con->list_entry, &nat->bsc_connections);
|
|
|
|
sccp_con = talloc_zero(con, struct sccp_connections);
|
|
sccp_con->msc_endp = 12;
|
|
sccp_con->bsc_endp = 12;
|
|
sccp_con->bsc = con;
|
|
llist_add(&sccp_con->list_entry, &nat->sccp_connections);
|
|
|
|
if (bsc_mgcp_find_con(nat, 11) != NULL) {
|
|
printf("Found the wrong connection.\n");
|
|
abort();
|
|
}
|
|
|
|
if (bsc_mgcp_find_con(nat, 12) != sccp_con) {
|
|
printf("Didn't find the connection\n");
|
|
abort();
|
|
}
|
|
|
|
/* free everything */
|
|
talloc_free(nat);
|
|
}
|
|
|
|
static void test_mgcp_rewrite(void)
|
|
{
|
|
int i;
|
|
struct msgb *output;
|
|
printf("Testing rewriting MGCP messages.\n");
|
|
|
|
for (i = 0; i < ARRAY_SIZE(mgcp_messages); ++i) {
|
|
const char *orig = mgcp_messages[i].orig;
|
|
const char *patc = mgcp_messages[i].patch;
|
|
const char *ip = mgcp_messages[i].ip;
|
|
const int port = mgcp_messages[i].port;
|
|
|
|
char *input = strdup(orig);
|
|
|
|
output = bsc_mgcp_rewrite(input, strlen(input), 0x1e, ip, port);
|
|
if (msgb_l2len(output) != strlen(patc)) {
|
|
printf("Wrong sizes for test: %d %d != %d != %d\n", i, msgb_l2len(output), strlen(patc), strlen(orig));
|
|
printf("String '%s' vs '%s'\n", (const char *) output->l2h, patc);
|
|
abort();
|
|
}
|
|
|
|
if (memcmp(output->l2h, patc, msgb_l2len(output)) != 0) {
|
|
printf("Broken on %d msg: '%s'\n", i, (const char *) output->l2h);
|
|
abort();
|
|
}
|
|
|
|
msgb_free(output);
|
|
free(input);
|
|
}
|
|
}
|
|
|
|
static void test_mgcp_parse(void)
|
|
{
|
|
int code, ci;
|
|
char transaction[60];
|
|
|
|
printf("Testing MGCP response parsing.\n");
|
|
|
|
if (bsc_mgcp_parse_response(crcx_resp, &code, transaction) != 0) {
|
|
printf("Failed to parse CRCX resp.\n");
|
|
abort();
|
|
}
|
|
|
|
if (code != 200) {
|
|
printf("Failed to parse the CODE properly. Got: %d\n", code);
|
|
abort();
|
|
}
|
|
|
|
if (strcmp(transaction, "23265295") != 0) {
|
|
printf("Failed to parse transaction id: '%s'\n", transaction);
|
|
abort();
|
|
}
|
|
|
|
ci = bsc_mgcp_extract_ci(crcx_resp);
|
|
if (ci != 1) {
|
|
printf("Failed to parse the CI. Got: %d\n", ci);
|
|
abort();
|
|
}
|
|
}
|
|
|
|
struct cr_filter {
|
|
const uint8_t *data;
|
|
int length;
|
|
int result;
|
|
int contype;
|
|
|
|
const char *bsc_imsi_allow;
|
|
const char *bsc_imsi_deny;
|
|
const char *nat_imsi_deny;
|
|
};
|
|
|
|
static struct cr_filter cr_filter[] = {
|
|
{
|
|
.data = bssmap_cr,
|
|
.length = sizeof(bssmap_cr),
|
|
.result = 1,
|
|
.contype = NAT_CON_TYPE_CM_SERV_REQ,
|
|
},
|
|
{
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = 1,
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
.data = pag_resp,
|
|
.length = sizeof(pag_resp),
|
|
.result = 1,
|
|
.contype = NAT_CON_TYPE_PAG_RESP,
|
|
},
|
|
{
|
|
/* nat deny is before blank/null BSC */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = -3,
|
|
.nat_imsi_deny = "[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
/* BSC allow is before NAT deny */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = 1,
|
|
.nat_imsi_deny = "[0-9]*",
|
|
.bsc_imsi_allow = "2440[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
/* BSC allow is before NAT deny */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = 1,
|
|
.bsc_imsi_allow = "[0-9]*",
|
|
.nat_imsi_deny = "[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
/* filter as deny is first */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = 1,
|
|
.bsc_imsi_deny = "[0-9]*",
|
|
.bsc_imsi_allow = "[0-9]*",
|
|
.nat_imsi_deny = "[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
/* deny by nat rule */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = -3,
|
|
.bsc_imsi_deny = "000[0-9]*",
|
|
.nat_imsi_deny = "[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
{
|
|
/* deny by bsc rule */
|
|
.data = bss_lu,
|
|
.length = sizeof(bss_lu),
|
|
.result = -2,
|
|
.bsc_imsi_deny = "[0-9]*",
|
|
.contype = NAT_CON_TYPE_LU,
|
|
},
|
|
|
|
};
|
|
|
|
static void test_cr_filter()
|
|
{
|
|
int i, res, contype;
|
|
struct msgb *msg = msgb_alloc(4096, "test_cr_filter");
|
|
struct bsc_nat_parsed *parsed;
|
|
struct bsc_nat_acc_lst *nat_lst, *bsc_lst;
|
|
struct bsc_nat_acc_lst_entry *nat_entry, *bsc_entry;
|
|
struct bsc_nat_reject_cause cause;
|
|
|
|
struct bsc_nat *nat = bsc_nat_alloc();
|
|
struct bsc_connection *bsc = bsc_connection_alloc(nat);
|
|
bsc->cfg = bsc_config_alloc(nat, "foo");
|
|
bsc_config_add_lac(bsc->cfg, 1234);
|
|
bsc->cfg->acc_lst_name = "bsc";
|
|
nat->acc_lst_name = "nat";
|
|
|
|
nat_lst = bsc_nat_acc_lst_get(nat, "nat");
|
|
bsc_lst = bsc_nat_acc_lst_get(nat, "bsc");
|
|
|
|
bsc_entry = bsc_nat_acc_lst_entry_create(bsc_lst);
|
|
nat_entry = bsc_nat_acc_lst_entry_create(nat_lst);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(cr_filter); ++i) {
|
|
char *imsi;
|
|
msgb_reset(msg);
|
|
copy_to_msg(msg, cr_filter[i].data, cr_filter[i].length);
|
|
|
|
nat_lst = bsc_nat_acc_lst_get(nat, "nat");
|
|
bsc_lst = bsc_nat_acc_lst_get(nat, "bsc");
|
|
|
|
if (gsm_parse_reg(nat_entry, &nat_entry->imsi_deny_re, &nat_entry->imsi_deny,
|
|
cr_filter[i].nat_imsi_deny ? 1 : 0,
|
|
&cr_filter[i].nat_imsi_deny) != 0)
|
|
abort();
|
|
if (gsm_parse_reg(bsc_entry, &bsc_entry->imsi_allow_re, &bsc_entry->imsi_allow,
|
|
cr_filter[i].bsc_imsi_allow ? 1 : 0,
|
|
&cr_filter[i].bsc_imsi_allow) != 0)
|
|
abort();
|
|
if (gsm_parse_reg(bsc_entry, &bsc_entry->imsi_deny_re, &bsc_entry->imsi_deny,
|
|
cr_filter[i].bsc_imsi_deny ? 1 : 0,
|
|
&cr_filter[i].bsc_imsi_deny) != 0)
|
|
abort();
|
|
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Failed to parse the message\n");
|
|
abort();
|
|
}
|
|
|
|
memset(&cause, 0, sizeof(cause));
|
|
res = bsc_nat_filter_sccp_cr(bsc, msg, parsed, &contype, &imsi, &cause);
|
|
if (res != cr_filter[i].result) {
|
|
printf("FAIL: Wrong result %d for test %d.\n", res, i);
|
|
abort();
|
|
}
|
|
|
|
if (contype != cr_filter[i].contype) {
|
|
printf("FAIL: Wrong contype %d for test %d.\n", res, contype);
|
|
abort();
|
|
}
|
|
|
|
talloc_steal(parsed, imsi);
|
|
talloc_free(parsed);
|
|
}
|
|
|
|
msgb_free(msg);
|
|
}
|
|
|
|
static void test_dt_filter()
|
|
{
|
|
int i;
|
|
struct msgb *msg = msgb_alloc(4096, "test_dt_filter");
|
|
struct bsc_nat_parsed *parsed;
|
|
struct bsc_nat_reject_cause cause;
|
|
|
|
struct bsc_nat *nat = bsc_nat_alloc();
|
|
struct bsc_connection *bsc = bsc_connection_alloc(nat);
|
|
struct sccp_connections *con = talloc_zero(0, struct sccp_connections);
|
|
|
|
bsc->cfg = bsc_config_alloc(nat, "foo");
|
|
bsc_config_add_lac(bsc->cfg, 23);
|
|
con->bsc = bsc;
|
|
|
|
msgb_reset(msg);
|
|
copy_to_msg(msg, id_resp, ARRAY_SIZE(id_resp));
|
|
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse ID resp\n");
|
|
abort();
|
|
}
|
|
|
|
if (parsed->bssap != BSSAP_MSG_DTAP) {
|
|
printf("FAIL: It should be dtap\n");
|
|
abort();
|
|
}
|
|
|
|
/* gsm_type is actually the size of the dtap */
|
|
if (parsed->gsm_type < msgb_l3len(msg) - 3) {
|
|
printf("FAIL: Not enough space for the content\n");
|
|
abort();
|
|
}
|
|
|
|
memset(&cause, 0, sizeof(cause));
|
|
if (bsc_nat_filter_dt(bsc, msg, con, parsed, &cause) != 1) {
|
|
printf("FAIL: Should have passed..\n");
|
|
abort();
|
|
}
|
|
|
|
/* just some basic length checking... */
|
|
for (i = ARRAY_SIZE(id_resp); i >= 0; --i) {
|
|
msgb_reset(msg);
|
|
copy_to_msg(msg, id_resp, ARRAY_SIZE(id_resp));
|
|
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed)
|
|
continue;
|
|
|
|
con->imsi_checked = 0;
|
|
memset(&cause, 0, sizeof(cause));
|
|
bsc_nat_filter_dt(bsc, msg, con, parsed, &cause);
|
|
}
|
|
}
|
|
|
|
static void test_setup_rewrite()
|
|
{
|
|
struct msgb *msg = msgb_alloc(4096, "test_dt_filter");
|
|
struct msgb *out;
|
|
struct bsc_nat_parsed *parsed;
|
|
const char *imsi = "27408000001234";
|
|
|
|
struct bsc_nat *nat = bsc_nat_alloc();
|
|
|
|
/* a fake list */
|
|
struct osmo_config_list entries;
|
|
struct osmo_config_entry entry;
|
|
|
|
INIT_LLIST_HEAD(&entries.entry);
|
|
entry.mcc = "274";
|
|
entry.mnc = "08";
|
|
entry.option = "^0([1-9])";
|
|
entry.text = "0049";
|
|
llist_add_tail(&entry.list, &entries.entry);
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
|
|
|
|
/* verify that nothing changed */
|
|
msgb_reset(msg);
|
|
copy_to_msg(msg, cc_setup_international, ARRAY_SIZE(cc_setup_international));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse ID resp\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (msg != out) {
|
|
printf("FAIL: The message should not have been changed\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, cc_setup_international, ARRAY_SIZE(cc_setup_international));
|
|
talloc_free(parsed);
|
|
|
|
/* verify that something in the message changes */
|
|
msgb_reset(msg);
|
|
copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse ID resp\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (!out) {
|
|
printf("FAIL: A new message should be created.\n");
|
|
abort();
|
|
}
|
|
|
|
if (msg == out) {
|
|
printf("FAIL: The message should have changed\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
|
|
msgb_free(out);
|
|
|
|
/* Make sure that a wildcard is matching */
|
|
entry.mnc = "*";
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
|
|
msg = msgb_alloc(4096, "test_dt_filter");
|
|
copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse ID resp\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (!out) {
|
|
printf("FAIL: A new message should be created.\n");
|
|
abort();
|
|
}
|
|
|
|
if (msg == out) {
|
|
printf("FAIL: The message should have changed\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, cc_setup_national_patched, ARRAY_SIZE(cc_setup_national_patched));
|
|
msgb_free(out);
|
|
|
|
/* Make sure that a wildcard is matching */
|
|
entry.mnc = "09";
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->num_rewr, &entries);
|
|
msg = msgb_alloc(4096, "test_dt_filter");
|
|
copy_to_msg(msg, cc_setup_national, ARRAY_SIZE(cc_setup_national));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse ID resp\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out != msg) {
|
|
printf("FAIL: The message should be unchanged.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, cc_setup_national, ARRAY_SIZE(cc_setup_national));
|
|
msgb_free(out);
|
|
}
|
|
|
|
static void test_sms_smsc_rewrite()
|
|
{
|
|
struct msgb *msg = msgb_alloc(4096, "SMSC rewrite"), *out;
|
|
struct bsc_nat_parsed *parsed;
|
|
const char *imsi = "515039900406700";
|
|
|
|
struct bsc_nat *nat = bsc_nat_alloc();
|
|
|
|
/* a fake list */
|
|
struct osmo_config_list smsc_entries, dest_entries, clear_entries;
|
|
struct osmo_config_entry smsc_entry, dest_entry, clear_entry;
|
|
|
|
INIT_LLIST_HEAD(&smsc_entries.entry);
|
|
INIT_LLIST_HEAD(&dest_entries.entry);
|
|
INIT_LLIST_HEAD(&clear_entries.entry);
|
|
smsc_entry.mcc = "^515039";
|
|
smsc_entry.option = "639180000105()";
|
|
smsc_entry.text = "6666666666667";
|
|
llist_add_tail(&smsc_entry.list, &smsc_entries.entry);
|
|
dest_entry.mcc = "515";
|
|
dest_entry.mnc = "03";
|
|
dest_entry.option = "^0049";
|
|
dest_entry.text = "";
|
|
llist_add_tail(&dest_entry.list, &dest_entries.entry);
|
|
clear_entry.mcc = "^515039";
|
|
clear_entry.option = "^0049";
|
|
clear_entry.text = "";
|
|
llist_add_tail(&clear_entry.list, &clear_entries.entry);
|
|
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->smsc_rewr, &smsc_entries);
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->tpdest_match, &dest_entries);
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_clear_tp_srr, &clear_entries);
|
|
|
|
printf("Testing SMSC rewriting.\n");
|
|
|
|
/*
|
|
* Check if the SMSC address is changed
|
|
*/
|
|
copy_to_msg(msg, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse SMS\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out == msg) {
|
|
printf("FAIL: This should have changed.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, smsc_rewrite_patched, ARRAY_SIZE(smsc_rewrite_patched));
|
|
msgb_free(out);
|
|
|
|
/* clear out the filter for SMSC */
|
|
printf("Attempting to only rewrite the HDR\n");
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->smsc_rewr, NULL);
|
|
msg = msgb_alloc(4096, "SMSC rewrite");
|
|
copy_to_msg(msg, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse SMS\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out == msg) {
|
|
printf("FAIL: This should have changed.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, smsc_rewrite_patched_hdr, ARRAY_SIZE(smsc_rewrite_patched_hdr));
|
|
msgb_free(out);
|
|
|
|
/* clear out the next filter */
|
|
printf("Attempting to change nothing.\n");
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_clear_tp_srr, NULL);
|
|
msg = msgb_alloc(4096, "SMSC rewrite");
|
|
copy_to_msg(msg, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse SMS\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out != msg) {
|
|
printf("FAIL: This should not have changed.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
msgb_free(out);
|
|
}
|
|
|
|
static void test_sms_number_rewrite(void)
|
|
{
|
|
struct msgb *msg, *out;
|
|
struct bsc_nat_parsed *parsed;
|
|
const char *imsi = "515039900406700";
|
|
|
|
struct bsc_nat *nat = bsc_nat_alloc();
|
|
|
|
/* a fake list */
|
|
struct osmo_config_list num_entries, clear_entries;
|
|
struct osmo_config_entry num_entry, clear_entry;
|
|
|
|
INIT_LLIST_HEAD(&num_entries.entry);
|
|
num_entry.mcc = "^515039";
|
|
num_entry.option = "^0049()";
|
|
num_entry.text = "0032";
|
|
llist_add_tail(&num_entry.list, &num_entries.entry);
|
|
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_num_rewr, &num_entries);
|
|
|
|
printf("Testing SMS TP-DA rewriting.\n");
|
|
|
|
/*
|
|
* Check if the SMSC address is changed
|
|
*/
|
|
msg = msgb_alloc(4096, "SMSC rewrite");
|
|
copy_to_msg(msg, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse SMS\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out == msg) {
|
|
printf("FAIL: This should have changed.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, smsc_rewrite_num_patched,
|
|
ARRAY_SIZE(smsc_rewrite_num_patched));
|
|
msgb_free(out);
|
|
|
|
/*
|
|
* Now with TP-SRR rewriting enabled
|
|
*/
|
|
INIT_LLIST_HEAD(&clear_entries.entry);
|
|
clear_entry.mcc = "^515039";
|
|
clear_entry.option = "";
|
|
clear_entry.text = "";
|
|
llist_add_tail(&clear_entry.list, &clear_entries.entry);
|
|
bsc_nat_num_rewr_entry_adapt(nat, &nat->sms_clear_tp_srr, &clear_entries);
|
|
|
|
msg = msgb_alloc(4096, "SMSC rewrite");
|
|
copy_to_msg(msg, smsc_rewrite, ARRAY_SIZE(smsc_rewrite));
|
|
parsed = bsc_nat_parse(msg);
|
|
if (!parsed) {
|
|
printf("FAIL: Could not parse SMS\n");
|
|
abort();
|
|
}
|
|
|
|
out = bsc_nat_rewrite_msg(nat, msg, parsed, imsi);
|
|
if (out == msg) {
|
|
printf("FAIL: This should have changed.\n");
|
|
abort();
|
|
}
|
|
|
|
verify_msg(out, smsc_rewrite_num_patched_tp_srr,
|
|
ARRAY_SIZE(smsc_rewrite_num_patched_tp_srr));
|
|
msgb_free(out);
|
|
}
|
|
|
|
static void test_barr_list_parsing(void)
|
|
{
|
|
int rc;
|
|
int cm, lu;
|
|
struct rb_node *node;
|
|
struct rb_root root = RB_ROOT;
|
|
struct osmo_config_list *lst = osmo_config_list_parse(NULL, "barr.cfg");
|
|
if (lst == NULL)
|
|
abort();
|
|
|
|
rc = bsc_nat_barr_adapt(NULL, &root, lst);
|
|
if (rc != 0)
|
|
abort();
|
|
talloc_free(lst);
|
|
|
|
|
|
for (node = rb_first(&root); node; node = rb_next(node)) {
|
|
struct bsc_nat_barr_entry *entry;
|
|
entry = rb_entry(node, struct bsc_nat_barr_entry, node);
|
|
printf("IMSI: %s CM: %d LU: %d\n", entry->imsi,
|
|
entry->cm_reject_cause, entry->lu_reject_cause);
|
|
}
|
|
|
|
/* do the look up now.. */
|
|
rc = bsc_nat_barr_find(&root, "12123119", &cm, &lu);
|
|
if (!rc) {
|
|
printf("Failed to find the IMSI.\n");
|
|
abort();
|
|
}
|
|
|
|
if (cm != 3 || lu != 4) {
|
|
printf("Found CM(%d) and LU(%d)\n", cm, lu);
|
|
abort();
|
|
}
|
|
|
|
/* empty and check that it is empty */
|
|
bsc_nat_barr_adapt(NULL, &root, NULL);
|
|
if (!RB_EMPTY_ROOT(&root)) {
|
|
printf("Failed to empty the list.\n");
|
|
abort();
|
|
}
|
|
|
|
/* check that dup results in an error */
|
|
lst = osmo_config_list_parse(NULL, "barr_dup.cfg");
|
|
if (lst == NULL) {
|
|
printf("Failed to parse list with dups\n");
|
|
abort();
|
|
}
|
|
|
|
rc = bsc_nat_barr_adapt(NULL, &root, lst);
|
|
if (rc != -1) {
|
|
printf("It should have failed due dup\n");
|
|
abort();
|
|
}
|
|
talloc_free(lst);
|
|
|
|
/* dump for reference */
|
|
for (node = rb_first(&root); node; node = rb_next(node)) {
|
|
struct bsc_nat_barr_entry *entry;
|
|
entry = rb_entry(node, struct bsc_nat_barr_entry, node);
|
|
printf("IMSI: %s CM: %d LU: %d\n", entry->imsi,
|
|
entry->cm_reject_cause, entry->lu_reject_cause);
|
|
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
sccp_set_log_area(DSCCP);
|
|
osmo_init_logging(&log_info);
|
|
|
|
test_filter();
|
|
test_contrack();
|
|
test_paging();
|
|
test_mgcp_ass_tracking();
|
|
test_mgcp_find();
|
|
test_mgcp_rewrite();
|
|
test_mgcp_parse();
|
|
test_cr_filter();
|
|
test_dt_filter();
|
|
test_setup_rewrite();
|
|
test_sms_smsc_rewrite();
|
|
test_sms_number_rewrite();
|
|
test_mgcp_allocations();
|
|
test_barr_list_parsing();
|
|
|
|
printf("Testing execution completed.\n");
|
|
return 0;
|
|
}
|
|
|
|
/* stub */
|
|
void bsc_nat_send_mgcp_to_msc(struct bsc_nat *nat, struct msgb *msg)
|
|
{
|
|
abort();
|
|
}
|