99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* NAT utilities using SCCP types */
|
|
/*
|
|
* (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
|
|
* (C) 2010 by On-Waves
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef BSC_NAT_SCCP_H
|
|
#define BSC_NAT_SCCP_H
|
|
|
|
#include <osmocom/sccp/sccp_types.h>
|
|
|
|
/*
|
|
* For the NAT we will need to analyze and later patch
|
|
* the received message. This would require us to parse
|
|
* the IPA and SCCP header twice. Instead of doing this
|
|
* we will have one analyze structure and have the patching
|
|
* and filter operate on the same structure.
|
|
*/
|
|
struct bsc_nat_parsed {
|
|
/* ip access prototype */
|
|
int ipa_proto;
|
|
|
|
/* source local reference */
|
|
struct sccp_source_reference *src_local_ref;
|
|
|
|
/* destination local reference */
|
|
struct sccp_source_reference *dest_local_ref;
|
|
|
|
/* called ssn number */
|
|
int called_ssn;
|
|
|
|
/* calling ssn number */
|
|
int calling_ssn;
|
|
|
|
/* sccp message type */
|
|
int sccp_type;
|
|
|
|
/* bssap type, e.g. 0 for BSS Management */
|
|
int bssap;
|
|
|
|
/* the gsm0808 message type */
|
|
int gsm_type;
|
|
};
|
|
|
|
/*
|
|
* Per SCCP source local reference patch table. It needs to
|
|
* be updated on new SCCP connections, connection confirm and reject,
|
|
* and on the loss of the BSC connection.
|
|
*/
|
|
struct sccp_connections {
|
|
struct llist_head list_entry;
|
|
|
|
struct bsc_connection *bsc;
|
|
struct bsc_msc_connection *msc_con;
|
|
|
|
struct sccp_source_reference real_ref;
|
|
struct sccp_source_reference patched_ref;
|
|
struct sccp_source_reference remote_ref;
|
|
int has_remote_ref;
|
|
|
|
/* status */
|
|
int con_type;
|
|
int con_local;
|
|
int authorized;
|
|
int imsi_checked;
|
|
char *imsi;
|
|
|
|
/* remember which Transactions we run over the bypass */
|
|
char ussd_ti[8];
|
|
|
|
/*
|
|
* audio handling. Remember if we have ever send a CRCX,
|
|
* remember the endpoint used by the MSC and BSC.
|
|
*/
|
|
int msc_endp;
|
|
int bsc_endp;
|
|
|
|
/* timeout handling */
|
|
struct timespec creation_time;
|
|
};
|
|
|
|
|
|
#endif
|