static int rtp_data_bts(struct osmo_fd *fd, unsigned int what)
{
char buf[4096];
struct sockaddr_in addr;
struct mgcp_endpoint *endp;
int rc, proto;
endp = (struct mgcp_endpoint *) fd->data;
rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf));
if (rc <= 0)
return -1;
proto = fd == &endp->bts_end.rtp ? PROTO_RTP : PROTO_RTCP;
/* We have no idea who called us, maybe it is the BTS. */
/* it was the BTS... */
discover_bts(endp, proto, &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",
ENDPOINT_NUMBER(endp));
return 0;
}
/* do this before the loop handling */
endp->bts_end.packets += 1;
endp->bts_end.octets += rc;
forward_data(fd->fd, &endp->taps[MGCP_TAP_BTS_IN], buf, rc);
switch (endp->type) {
case MGCP_RTP_DEFAULT:
return send_to(endp, DEST_NETWORK, proto == PROTO_RTP, &addr,
buf, rc);
case MGCP_RTP_TRANSCODED:
return send_transcoder(&endp->trans_bts, endp->cfg,
proto == PROTO_RTP, buf, rc);
}
LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n",
endp->type, ENDPOINT_NUMBER(endp));
return 0;
}
static int rtp_data_net(struct osmo_fd *fd, unsigned int what)
{
char buf[4096];
struct sockaddr_in addr;
struct mgcp_endpoint *endp;
int rc, proto;
endp = (struct mgcp_endpoint *) fd->data;
rc = receive_from(endp, fd->fd, &addr, buf, sizeof(buf));
if (rc <= 0)
return -1;
if (memcmp(&addr.sin_addr, &endp->net_end.addr, sizeof(addr.sin_addr)) != 0) {
LOGP(DMGCP, LOGL_ERROR,
"Endpoint 0x%x data from wrong address %s vs. ",
ENDPOINT_NUMBER(endp), inet_ntoa(addr.sin_addr));
LOGPC(DMGCP, LOGL_ERROR,
"%s\n", inet_ntoa(endp->net_end.addr));
return -1;
}
if (endp->net_end.rtp_port != addr.sin_port &&
endp->net_end.rtcp_port != addr.sin_port) {
LOGP(DMGCP, LOGL_ERROR,
"Data from wrong 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 network on 0x%x\n",
ENDPOINT_NUMBER(endp));
return 0;
}
proto = fd == &endp->net_end.rtp ? PROTO_RTP : PROTO_RTCP;
endp->net_end.packets += 1;
endp->net_end.octets += rc;
forward_data(fd->fd, &endp->taps[MGCP_TAP_NET_IN], buf, rc);
switch (endp->type) {
case MGCP_RTP_DEFAULT:
return send_to(endp, DEST_BTS, proto == PROTO_RTP, &addr,
buf, rc);
case MGCP_RTP_TRANSCODED:
return send_transcoder(&endp->trans_net, endp->cfg,
proto == PROTO_RTP, buf, rc);
}
LOGP(DMGCP, LOGL_ERROR, "Bad MGCP type %u on endpoint %u\n",
endp->type, ENDPOINT_NUMBER(endp));
return 0;
}
int CUdpSocket::receive_from(void* buffer, size_t buffer_size, uint32_t* from_ip, uint16_t* from_port) throw (sys::CSyscallException)
{
struct sockaddr_in from_addr;
int bytes = receive_from(buffer, buffer_size, &from_addr);
*from_ip = from_addr.sin_addr.s_addr;
*from_port = ntohs(from_addr.sin_port);
return bytes;
}
int
boss::Socket::receive_from(void *buf, size_t len,
string & from_address, uint16_t & from_port, int flags)
{
struct sockaddr from;
socklen_t fromlen = sizeof(struct sockaddr);
struct sockaddr_in *p = (struct sockaddr_in *) &from;
bzero(&from, sizeof(struct sockaddr));
int bytes = receive_from(buf, len, from, fromlen, flags);
if (bytes < 0){
throw SocketException(_error_text);
}
char addr[INET_ADDRSTRLEN];
from_address = inet_ntop(AF_INET, &p->sin_addr, addr, sizeof(addr));
from_port = ntohs(p->sin_port);
return bytes;
}
static int rtp_data_transcoder(struct mgcp_rtp_end *end, struct mgcp_endpoint *_endp,
int dest, struct osmo_fd *fd)
{
char buf[RTP_BUF_SIZE];
struct sockaddr_in addr;
struct mgcp_config *cfg;
int rc, proto;
cfg = _endp->cfg;
rc = receive_from(_endp, fd->fd, &addr, buf, sizeof(buf));
if (rc <= 0)
return -1;
proto = fd == &end->rtp ? MGCP_PROTO_RTP : MGCP_PROTO_RTCP;
if (memcmp(&addr.sin_addr, &cfg->transcoder_in, sizeof(addr.sin_addr)) != 0) {
LOGP(DMGCP, LOGL_ERROR,
"Data not coming from transcoder dest: %d %s on 0x%x\n",
dest, inet_ntoa(addr.sin_addr), ENDPOINT_NUMBER(_endp));
return -1;
}
if (end->rtp_port != addr.sin_port &&
end->rtcp_port != addr.sin_port) {
LOGP(DMGCP, LOGL_ERROR,
"Data from wrong transcoder dest %d source port %d on 0x%x\n",
dest, ntohs(addr.sin_port), ENDPOINT_NUMBER(_endp));
return -1;
}
/* throw away the dummy message */
if (rc == 1 && buf[0] == MGCP_DUMMY_LOAD) {
LOGP(DMGCP, LOGL_NOTICE, "Filtered dummy from transcoder dest %d on 0x%x\n",
dest, ENDPOINT_NUMBER(_endp));
return 0;
}
end->packets += 1;
return mgcp_send(_endp, dest, proto == MGCP_PROTO_RTP, &addr, buf, rc);
}
