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nat: Create a USSD module to filter out USSDs...

This commit is contained in:
Holger Hans Peter Freyther 2010-09-29 19:32:55 +08:00
parent 74dc303134
commit 17870cf533
4 changed files with 43 additions and 1 deletions
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3
openbsc/include/openbsc/bsc_nat.h
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@ -320,4 +320,7 @@ int bsc_conn_type_to_ctr(struct sccp_connections *conn);
struct gsm48_hdr *bsc_unpack_dtap(struct bsc_nat_parsed *parsed, struct msgb *msg, uint32_t *len);
/** USSD filtering */
int bsc_check_ussd(struct sccp_connections *con, struct bsc_nat_parsed *parsed, struct msgb *msg);
#endif

2
openbsc/src/nat/Makefile.am
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@ -6,7 +6,7 @@ bin_PROGRAMS = bsc_nat
bsc_nat_SOURCES = bsc_filter.c bsc_mgcp_utils.c bsc_nat.c bsc_nat_utils.c \
bsc_nat_vty.c bsc_sccp.c \
bsc_nat_vty.c bsc_sccp.c bsc_ussd.c \
$(top_srcdir)/src/debug.c $(top_srcdir)/src/bsc_msc.c
bsc_nat_LDADD = $(top_builddir)/src/libvty.a \
$(top_builddir)/src/libmgcp.a $(top_builddir)/src/libbsc.a \

7
openbsc/src/nat/bsc_nat.c
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@ -854,12 +854,19 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
con = NULL;
goto exit2;
}
/* hand data to a side channel */
if (bsc_check_ussd(con, parsed, msg) == 1) {
/* we are going to take over the connection */
/* TODO: */
}
}
con_bsc = con->bsc;
con_msc = con->msc_con;
con_filter = con->con_local;
}
break;
case SCCP_MSG_TYPE_RLC:
con = patch_sccp_src_ref_to_msc(msg, parsed, bsc);

32
openbsc/src/nat/bsc_ussd.c Normal file
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@ -0,0 +1,32 @@
/* USSD Filter Code */
/*
* (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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <openbsc/bsc_nat.h>
#include <openbsc/bsc_nat_sccp.h>
int bsc_check_ussd(struct sccp_connections *con, struct bsc_nat_parsed *parsed,
struct msgb *msg)
{
return 0;
}