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nat: Start inspecting every message coming from the BSC for the IMSI

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Return early in case the IMSI was already checked, if not we need
to look at the connection and check if the message could contain a
imsi we want/need to filter.
This commit is contained in:
Holger Hans Peter Freyther
2010-09-15 01:11:08 +08:00
parent 909e61fddc
commit 74e0a1b91c
3 changed files with 22 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
openbsc/include/openbsc/bsc_nat.h
View File

@@ -243,6 +243,8 @@ struct bsc_connection *bsc_nat_find_bsc(struct bsc_nat *nat, struct msgb *msg, i
*/
int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg,
struct bsc_nat_parsed *, int *con_type);
int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
struct sccp_connections *con, struct bsc_nat_parsed *parsed);
/**
* SCCP patching and handling

14
openbsc/src/nat/bsc_nat.c
View File

@@ -731,9 +731,17 @@ static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
case SCCP_MSG_TYPE_IT:
con = patch_sccp_src_ref_to_msc(msg, parsed, bsc);
if (con) {
con_bsc = con->bsc;
con_msc = con->msc_con;
con_filter = con->con_local;
filter = bsc_nat_filter_dt(bsc, msg, con, parsed);
if (filter == 0) {
con_bsc = con->bsc;
con_msc = con->msc_con;
con_filter = con->con_local;
} else {
LOGP(DNAT, LOGL_ERROR, "Should drop the connection.\n");
con_bsc = con->bsc;
con_msc = con->msc_con;
con_filter = con->con_local;
}
}
break;
case SCCP_MSG_TYPE_RLC:

9
openbsc/src/nat/bsc_nat_utils.c
View File

@@ -431,6 +431,15 @@ int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, struct
}
}
int bsc_nat_filter_dt(struct bsc_connection *bsc, struct msgb *msg,
struct sccp_connections *con, struct bsc_nat_parsed *parsed)
{
if (con->imsi_checked)
return 0;
return 0;
}
void bsc_parse_reg(void *ctx, regex_t *reg, char **imsi, int argc, const char **argv)
{
if (*imsi) {