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mgcp: Be more strict on the source addr/source port of the bts

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Once we have discovered the bts we will not accept data from
anything else. The call will drop if the BTS is changing the
ip address of the nat anyway.
This commit is contained in:
Holger Hans Peter Freyther
2010-08-05 10:53:26 +00:00
parent b97c50db0a
commit ea97fbf1a1
1 changed files with 15 additions and 0 deletions
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15
openbsc/src/mgcp/mgcp_network.c
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@@ -285,6 +285,21 @@ static int rtp_data_bts(struct bsc_fd *fd, unsigned int what)
inet_ntoa(addr.sin_addr));
}
if (memcmp(&endp->bts_end.addr, &addr.sin_addr, sizeof(addr.sin_addr)) != 0) {
LOGP(DMGCP, LOGL_ERROR,
"Data from wrong bts %s on 0x%x\n",
inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(endp));
return -1;
}
if (endp->bts_end.rtp_port != addr.sin_port &&
endp->bts_end.rtcp_port != addr.sin_port) {
LOGP(DMGCP, LOGL_ERROR,
"Data from wrong bts source port %d on 0x%x\n",
ntohs(addr.sin_port), ENDPOINT_NUMBER(endp));
return -1;
}
/* throw away the dummy message */
if (rc == 1 && buf[0] == DUMMY_LOAD) {
LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from bts on 0x%x\n",