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mgcp: Introduce trans_bts and send BTS packets from this port

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Introduce the trans_bts. Right now only a port is allocated
and the packets from the BTS are sent from this socket.
This commit is contained in:
Holger Hans Peter Freyther
2010-11-01 21:04:54 +01:00
parent e97155a2af
commit bd7b3c5e45
4 changed files with 67 additions and 18 deletions
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16
openbsc/include/openbsc/mgcp_internal.h
View File

@@ -99,6 +99,12 @@ struct mgcp_endpoint {
struct mgcp_rtp_end bts_end;
struct mgcp_rtp_end net_end;
/*
* For transcoding we will send from the local_port
* of trans_bts and it will arrive at trans_net from
* where we will forward it to the network.
*/
struct mgcp_rtp_end trans_bts;
struct mgcp_rtp_end trans_net;
int is_transcoded;
@@ -126,7 +132,15 @@ int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg,
int mgcp_send_dummy(struct mgcp_endpoint *endp);
int mgcp_bind_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
int mgcp_bind_transcoder_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *enp, int rtp_port);
int mgcp_free_rtp_port(struct mgcp_rtp_end *end);
/* For transcoding we need to manage an in and an output that are connected */
static inline int endp_back_channel(int endpoint)
{
return endpoint + 60;
}
#endif

22
openbsc/src/mgcp/mgcp_network.c
View File

@@ -191,8 +191,8 @@ static int send_transcoder(struct mgcp_endpoint *endp, int is_rtp,
addr.sin_port = htons(port);
rc = sendto(is_rtp ?
endp->bts_end.rtp.fd :
endp->bts_end.rtcp.fd, buf, len, 0,
endp->trans_bts.rtp.fd :
endp->trans_bts.rtcp.fd, buf, len, 0,
(struct sockaddr *) &addr, sizeof(addr));
if (rc != len)
@@ -543,7 +543,7 @@ int mgcp_bind_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
return bind_rtp(endp->cfg, &endp->net_end, ENDPOINT_NUMBER(endp));
}
int mgcp_bind_transcoder_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
int mgcp_bind_trans_net_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
{
if (endp->trans_net.rtp.fd != -1 || endp->trans_net.rtcp.fd != -1) {
LOGP(DMGCP, LOGL_ERROR, "Previous net-port was still bound on %d\n",
@@ -559,6 +559,22 @@ int mgcp_bind_transcoder_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
return bind_rtp(endp->cfg, &endp->trans_net, ENDPOINT_NUMBER(endp));
}
int mgcp_bind_trans_bts_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
{
if (endp->trans_bts.rtp.fd != -1 || endp->trans_bts.rtcp.fd != -1) {
LOGP(DMGCP, LOGL_ERROR, "Previous net-port was still bound on %d\n",
ENDPOINT_NUMBER(endp));
mgcp_free_rtp_port(&endp->trans_bts);
}
endp->trans_bts.local_port = rtp_port;
endp->trans_bts.rtp.cb = rtp_data_transcoder;
endp->trans_bts.rtp.data = endp;
endp->trans_bts.rtcp.data = endp;
endp->trans_bts.rtcp.cb = rtp_data_transcoder;
return bind_rtp(endp->cfg, &endp->trans_bts, ENDPOINT_NUMBER(endp));
}
int mgcp_free_rtp_port(struct mgcp_rtp_end *end)
{
if (end->rtp.fd != -1) {

31
openbsc/src/mgcp/mgcp_protocol.c
View File

@@ -423,12 +423,21 @@ static int allocate_ports(struct mgcp_endpoint *endp)
if (endp->cfg->transcoder_ip) {
if (allocate_port(endp, &endp->trans_net,
&endp->cfg->transcoder_ports,
mgcp_bind_transcoder_rtp_port) != 0) {
mgcp_bind_trans_net_rtp_port) != 0) {
mgcp_rtp_end_reset(&endp->net_end);
mgcp_rtp_end_reset(&endp->bts_end);
return -1;
}
if (allocate_port(endp, &endp->trans_bts,
&endp->cfg->transcoder_ports,
mgcp_bind_trans_bts_rtp_port) != 0) {
mgcp_rtp_end_reset(&endp->net_end);
mgcp_rtp_end_reset(&endp->bts_end);
mgcp_rtp_end_reset(&endp->trans_net);
return -1;
}
/* remember that we have set up transcoding */
endp->is_transcoded = 1;
}
@@ -830,6 +839,7 @@ int mgcp_endpoints_allocate(struct mgcp_config *cfg)
mgcp_rtp_end_init(&cfg->endpoints[i].net_end);
mgcp_rtp_end_init(&cfg->endpoints[i].bts_end);
mgcp_rtp_end_init(&cfg->endpoints[i].trans_net);
mgcp_rtp_end_init(&cfg->endpoints[i].trans_bts);
}
return 0;
@@ -854,6 +864,7 @@ void mgcp_free_endp(struct mgcp_endpoint *endp)
mgcp_rtp_end_reset(&endp->bts_end);
mgcp_rtp_end_reset(&endp->net_end);
mgcp_rtp_end_reset(&endp->trans_net);
mgcp_rtp_end_reset(&endp->trans_bts);
endp->is_transcoded = 0;
memset(&endp->net_state, 0, sizeof(endp->net_state));
@@ -865,12 +876,6 @@ void mgcp_free_endp(struct mgcp_endpoint *endp)
memset(&endp->taps, 0, sizeof(endp->taps));
}
/* For transcoding we need to manage an in and an output that are connected */
static int back_channel(int endpoint)
{
return endpoint + 60;
}
static int send_trans(struct mgcp_config *cfg, const char *buf, int len)
{
struct sockaddr_in addr;
@@ -932,16 +937,20 @@ static void create_transcoder(struct mgcp_endpoint *endp)
{
int port;
int in_endp = ENDPOINT_NUMBER(endp);
int out_endp = back_channel(in_endp);
int out_endp = endp_back_channel(in_endp);
if (!endp->is_transcoded)
return;
send_msg(endp, in_endp, endp->bts_end.local_port, "CRCX", "recvonly");
send_msg(endp, in_endp, endp->bts_end.local_port, "MDCX", "recvonly");
send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "recvonly");
send_msg(endp, in_endp, endp->trans_bts.local_port, "MDCX", "recvonly");
send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv");
send_msg(endp, out_endp, endp->trans_net.local_port, "MDCX", "sendrecv");
port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base);
endp->trans_bts.rtp_port = htons(port);
endp->trans_bts.rtcp_port = htons(port + 1);
port = rtp_calculate_port(out_endp, endp->cfg->transcoder_remote_base);
endp->trans_net.rtp_port = htons(port);
endp->trans_net.rtcp_port = htons(port + 1);
@@ -950,7 +959,7 @@ static void create_transcoder(struct mgcp_endpoint *endp)
static void delete_transcoder(struct mgcp_endpoint *endp)
{
int in_endp = ENDPOINT_NUMBER(endp);
int out_endp = back_channel(in_endp);
int out_endp = endp_back_channel(in_endp);
if (!endp->is_transcoded)
return;

16
openbsc/src/mgcp/mgcp_vty.c
View File

@@ -99,14 +99,14 @@ DEFUN(show_mcgp, show_mgcp_cmd, "show mgcp",
vty_out(vty, "MGCP is up and running with %u endpoints:%s", g_cfg->number_endpoints - 1, VTY_NEWLINE);
for (i = 1; i < g_cfg->number_endpoints; ++i) {
struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
vty_out(vty, " Endpoint 0x%.2x: CI: %d net: %u/%u bts: %u/%u on %s traffic received bts: %u/%u remote: %u/%u transcoder: %u%s",
vty_out(vty, " Endpoint 0x%.2x: CI: %d net: %u/%u bts: %u/%u on %s traffic received bts: %u/%u remote: %u/%u transcoder: %u/%u%s",
i, endp->ci,
ntohs(endp->net_end.rtp_port), ntohs(endp->net_end.rtcp_port),
ntohs(endp->bts_end.rtp_port), ntohs(endp->bts_end.rtcp_port),
inet_ntoa(endp->bts_end.addr),
endp->bts_end.packets, endp->bts_state.lost_no,
endp->net_end.packets, endp->net_state.lost_no,
endp->trans_net.packets,
endp->trans_net.packets, endp->trans_bts.packets,
VTY_NEWLINE);
}
@@ -523,13 +523,23 @@ int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg)
}
if (g_cfg->transcoder_ip && g_cfg->transcoder_ports.mode == PORT_ALLOC_STATIC) {
/* network side */
rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp),
g_cfg->transcoder_ports.base_port);
if (mgcp_bind_transcoder_rtp_port(endp, rtp_port) != 0) {
if (mgcp_bind_trans_net_rtp_port(endp, rtp_port) != 0) {
LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port);
return -1;
}
endp->trans_net.local_alloc = PORT_ALLOC_STATIC;
/* bts side */
rtp_port = rtp_calculate_port(endp_back_channel(ENDPOINT_NUMBER(endp)),
g_cfg->transcoder_ports.base_port);
if (mgcp_bind_trans_bts_rtp_port(endp, rtp_port) != 0) {
LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port);
return -1;
}
endp->trans_bts.local_alloc = PORT_ALLOC_STATIC;
}
}