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osmo-msc
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[mgcp] Add a dummy send method... 

This can be used by higher level code to send one dummy
message from the audio port to the network. This can be
used to make the remote discover the nated port of this
endpoint.
This commit is contained in:
Holger Hans Peter Freyther 2010-04-21 21:25:13 +08:00
parent 8d9833ef83
commit b844b876ad
2 changed files with 19 additions and 0 deletions
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1
openbsc/include/openbsc/mgcp_internal.h
View File

@ -73,5 +73,6 @@ struct mgcp_msg_ptr {
int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg,
struct mgcp_msg_ptr *ptr, int size,
const char **transaction_id, struct mgcp_endpoint **endp);
int mgcp_send_dummy(struct mgcp_endpoint *endp);
#endif

18
openbsc/src/mgcp/mgcp_network.c
View File

@ -73,6 +73,8 @@ enum {
PROTO_RTCP,
};
#define DUMMY_LOAD 0x23
static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len)
{
@ -84,6 +86,14 @@ static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len)
return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out));
}
int mgcp_send_dummy(struct mgcp_endpoint *endp)
{
static char buf[] = { DUMMY_LOAD };
return udp_send(endp->local_rtp.fd, &endp->remote,
endp->net_rtp, buf, 1);
}
static void patch_payload(int payload, char *data, int len)
{
struct rtp_hdr *rtp_hdr;
@ -161,6 +171,14 @@ static int rtp_data_cb(struct bsc_fd *fd, unsigned int what)
LOGP(DMGCP, LOGL_NOTICE, "Found BTS for endpoint: 0x%x on port: %d/%d of %s\n",
ENDPOINT_NUMBER(endp), ntohs(endp->bts_rtp), ntohs(endp->bts_rtcp),
inet_ntoa(addr.sin_addr));
/* throw away dummy message */
if (rc == 1 && buf[0] == DUMMY_LOAD) {
LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy on 0x%x\n",
ENDPOINT_NUMBER(endp));
return 0;
}
}
}