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Merge remote branch 'origin/on-waves/mgcp'

This commit is contained in:
Holger Hans Peter Freyther 2010-02-26 20:20:17 +01:00
parent 140f6e9b12 1ebad74377
commit 1d7f2f80b8
8 changed files with 914 additions and 614 deletions
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2
openbsc/include/openbsc/Makefile.am
View File

@ -5,7 +5,7 @@ noinst_HEADERS = abis_nm.h abis_rsl.h db.h gsm_04_08.h gsm_data.h \
ipaccess.h rs232.h openbscdefines.h rtp_proxy.h \
bsc_rll.h mncc.h transaction.h ussd.h gsm_04_80.h \
silent_call.h mgcp.h meas_rep.h rest_octets.h \
system_information.h handover.h
system_information.h handover.h mgcp_internal.h
openbsc_HEADERS = gsm_04_08.h meas_rep.h
openbscdir = $(includedir)/openbsc

72
openbsc/include/openbsc/mgcp.h
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@ -1,8 +1,8 @@
/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
/*
* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009 by On-Waves
* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2010 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
@ -26,8 +26,9 @@
#include <osmocore/msgb.h>
#include <arpa/inet.h>
#define RTP_PORT_DEFAULT 4000
extern unsigned int rtp_base_port;
/**
* Calculate the RTP audio port for the given multiplex
@ -53,18 +54,69 @@ static inline int rtp_calculate_port(int multiplex, int base)
return base + (multiplex * 2);
}
int mgcp_parse_config(const char *config_file, struct gsm_network *dummy_network);
struct msgb *mgcp_handle_message(struct msgb *msg);
struct msgb *mgcp_create_rsip(void);
int mgcp_vty_init(void);
/*
* Handling of MGCP Endpoints and the MGCP Config
*/
struct mgcp_endpoint;
struct mgcp_config;
/* endpoint managed */
#define MGCP_ENDP_CRCX 1
#define MGCP_ENDP_DLCX 2
#define MGCP_ENDP_MDCX 3
typedef int (*mgcp_change)(int endpoint, int state, int local_rtp, void *);
void mgcp_set_change_cb(mgcp_change cb, void *data);
/*
* what to do with the msg?
* - continue as usual?
* - reject and send a failure code?
* - defer? do not send anything
*/
#define MGCP_POLICY_CONT 4
#define MGCP_POLICY_REJECT 5
#define MGCP_POLICY_DEFER 6
typedef int (*mgcp_change)(struct mgcp_config *cfg, int endpoint, int state, int local_rtp);
typedef int (*mgcp_policy)(struct mgcp_config *cfg, int endpoint, int state, const char *transactio_id);
struct mgcp_config {
int source_port;
char *local_ip;
char *source_addr;
unsigned int number_endpoints;
char *bts_ip;
struct in_addr bts_in;
char *audio_name;
int audio_payload;
int audio_loop;
int early_bind;
int rtp_base_port;
char *forward_ip;
int forward_port;
mgcp_change change_cb;
mgcp_policy policy_cb;
void *data;
struct mgcp_endpoint *endpoints;
unsigned int last_call_id;
};
/* config management */
struct mgcp_config *mgcp_config_alloc(void);
int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg);
int mgcp_vty_init(void);
int mgcp_endpoints_allocate(struct mgcp_config *cfg);
int mgcp_bind_rtp_port(struct mgcp_endpoint *endp, int rtp_port);
void mgcp_free_endp(struct mgcp_endpoint *endp);
/*
* format helper functions
*/
struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg);
struct msgb *mgcp_create_rsip(void);
struct msgb *mgcp_create_response_with_data(int code, const char *msg, const char *trans, const char *data);
#endif

64
openbsc/include/openbsc/mgcp_internal.h Normal file
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@ -0,0 +1,64 @@
/* MGCP Private Data */
/*
* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2010 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#ifndef OPENBSC_MGCP_DATA_H
#define OPENBSC_MGCP_DATA_H
#include <osmocore/select.h>
#define CI_UNUSED 0
struct mgcp_endpoint {
int ci;
char *callid;
char *local_options;
int conn_mode;
int bts_payload_type;
int net_payload_type;
/* the local rtp port we are binding to */
int rtp_port;
/*
* RTP mangling:
* - we get RTP and RTCP to us and need to forward to the BTS
* - we get RTP and RTCP from the BTS and forward to the network
*/
struct bsc_fd local_rtp;
struct bsc_fd local_rtcp;
struct in_addr remote;
struct in_addr bts;
/* in network byte order */
int net_rtp, net_rtcp;
int bts_rtp, bts_rtcp;
/* backpointer */
struct mgcp_config *cfg;
};
#define ENDPOINT_NUMBER(endp) abs(endp - endp->cfg->endpoints)
#endif

3
openbsc/src/Makefile.am
View File

@ -41,7 +41,8 @@ ipaccess_config_LDADD = libbsc.a libmsc.a libbsc.a libvty.a -ldl -ldbi $(LIBCRYP
isdnsync_SOURCES = isdnsync.c
bsc_mgcp_SOURCES = mgcp/mgcp_main.c mgcp/mgcp_protocol.c debug.c telnet_interface.c
bsc_mgcp_SOURCES = mgcp/mgcp_main.c mgcp/mgcp_protocol.c mgcp/mgcp_network.c mgcp/mgcp_vty.c \
debug.c telnet_interface.c
bsc_mgcp_LDADD = libvty.a
ipaccess_proxy_SOURCES = ipaccess/ipaccess-proxy.c debug.c

30
openbsc/src/mgcp/mgcp_main.c
View File

@ -31,7 +31,6 @@
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <openbsc/debug.h>
#include <osmocore/msgb.h>
@ -41,9 +40,6 @@
#include <openbsc/mgcp.h>
#include <openbsc/telnet_interface.h>
#include <vty/command.h>
#include <vty/vty.h>
/* this is here for the vty... it will never be called */
void subscr_put() { abort(); }
@ -52,18 +48,15 @@ void subscr_put() { abort(); }
#warning "Make use of the rtp proxy code"
static int source_port = 2427;
static const char *source_addr = "0.0.0.0";
static struct bsc_fd bfd;
static int first_request = 1;
static struct mgcp_config *cfg;
static char *config_file = "mgcp.cfg";
/* used by msgb and mgcp */
void *tall_bsc_ctx = NULL;
unsigned int rtp_base_port = RTP_PORT_DEFAULT;
static void print_help()
{
printf("Some useful help...\n");
@ -136,7 +129,7 @@ static int read_call_agent(struct bsc_fd *fd, unsigned int what)
/* handle message now */
msg->l2h = msgb_put(msg, rc);
resp = mgcp_handle_message(msg);
resp = mgcp_handle_message(cfg, msg);
msgb_reset(msg);
if (resp) {
@ -147,15 +140,6 @@ static int read_call_agent(struct bsc_fd *fd, unsigned int what)
}
int bsc_vty_init(struct gsm_network *dummy)
{
cmd_init(1);
vty_init();
mgcp_vty_init();
return 0;
}
int main(int argc, char** argv)
{
struct gsm_network dummy_network;
@ -170,10 +154,14 @@ int main(int argc, char** argv)
debug_add_target(stderr_target);
debug_set_all_filter(stderr_target, 1);
cfg = mgcp_config_alloc();
if (!cfg)
return -1;
handle_options(argc, argv);
telnet_init(&dummy_network, 4243);
rc = mgcp_parse_config(config_file, &dummy_network);
rc = mgcp_parse_config(config_file, cfg);
if (rc < 0)
return rc;
@ -192,8 +180,8 @@ int main(int argc, char** argv)
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(source_port);
inet_aton(source_addr, &addr.sin_addr);
addr.sin_port = htons(cfg->source_port);
inet_aton(cfg->source_addr, &addr.sin_addr);
if (bind(bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("Gateway failed to bind");

255
openbsc/src/mgcp/mgcp_network.c Normal file
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@ -0,0 +1,255 @@
/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
/* The protocol implementation */
/*
* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2010 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <string.h>
#include <unistd.h>
#include <endian.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <osmocore/msgb.h>
#include <osmocore/talloc.h>
#include <osmocore/select.h>
#include <openbsc/debug.h>
#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>
#warning "Make use of the rtp proxy code"
/* according to rtp_proxy.c RFC 3550 */
struct rtp_hdr {
#if __BYTE_ORDER == __LITTLE_ENDIAN
u_int8_t csrc_count:4,
extension:1,
padding:1,
version:2;
u_int8_t payload_type:7,
marker:1;
#elif __BYTE_ORDER == __BIG_ENDIAN
u_int8_t version:2,
padding:1,
extension:1,
csrc_count:4;
u_int8_t marker:1,
payload_type:7;
#endif
u_int16_t sequence;
u_int32_t timestamp;
u_int32_t ssrc;
} __attribute__((packed));
enum {
DEST_NETWORK = 0,
DEST_BTS = 1,
};
enum {
PROTO_RTP,
PROTO_RTCP,
};
static int udp_send(int fd, struct in_addr *addr, int port, char *buf, int len)
{
struct sockaddr_in out;
out.sin_family = AF_INET;
out.sin_port = port;
memcpy(&out.sin_addr, addr, sizeof(*addr));
return sendto(fd, buf, len, 0, (struct sockaddr *)&out, sizeof(out));
}
static void patch_payload(int payload, char *data, int len)
{
struct rtp_hdr *rtp_hdr;
if (len < sizeof(*rtp_hdr))
return;
rtp_hdr = (struct rtp_hdr *) data;
rtp_hdr->payload_type = payload;
}
/*
* There is data coming. We will have to figure out if it
* came from the BTS or the MediaGateway of the MSC. On top
* of that we need to figure out if it was RTP or RTCP.
*
* Currently we do not communicate with the BSC so we have
* no idea where the BTS is listening for RTP and need to
* do the classic routing trick. Wait for the first packet
* from the BTS and then go ahead.
*/
static int rtp_data_cb(struct bsc_fd *fd, unsigned int what)
{
char buf[4096];
struct sockaddr_in addr;
socklen_t slen = sizeof(addr);
struct mgcp_endpoint *endp;
struct mgcp_config *cfg;
int rc, dest, proto;
endp = (struct mgcp_endpoint *) fd->data;
cfg = endp->cfg;
rc = recvfrom(fd->fd, &buf, sizeof(buf), 0,
(struct sockaddr *) &addr, &slen);
if (rc < 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to receive message on: 0x%x\n",
ENDPOINT_NUMBER(endp));
return -1;
}
/* do not forward aynthing... maybe there is a packet from the bts */
if (endp->ci == CI_UNUSED) {
LOGP(DMGCP, LOGL_ERROR, "Unknown message on endpoint: 0x%x\n", ENDPOINT_NUMBER(endp));
return -1;
}
/*
* Figure out where to forward it to. This code assumes that we
* have received the Connection Modify and know who is a legitimate
* partner. According to the spec we could attempt to forward even
* after the Create Connection but we will not as we are not really
* able to tell if this is legitimate.
*/
#warning "Slight spec violation. With connection mode recvonly we should attempt to forward."
dest = memcmp(&addr.sin_addr, &endp->remote, sizeof(addr.sin_addr)) == 0 &&
(endp->net_rtp == addr.sin_port || endp->net_rtcp == addr.sin_port)
? DEST_BTS : DEST_NETWORK;
proto = fd == &endp->local_rtp ? PROTO_RTP : PROTO_RTCP;
/* We have no idea who called us, maybe it is the BTS. */
if (dest == DEST_NETWORK && (endp->bts_rtp == 0 || cfg->forward_ip)) {
/* it was the BTS... */
if (!cfg->bts_ip || memcmp(&addr.sin_addr, &cfg->bts_in, sizeof(cfg->bts_in)) == 0) {
if (fd == &endp->local_rtp) {
endp->bts_rtp = addr.sin_port;
} else {
endp->bts_rtcp = addr.sin_port;
}
endp->bts = addr.sin_addr;
LOGP(DMGCP, LOGL_NOTICE, "Found BTS for endpoint: 0x%x on port: %d/%d\n",
ENDPOINT_NUMBER(endp), ntohs(endp->bts_rtp), ntohs(endp->bts_rtcp));
}
}
/* dispatch */
if (cfg->audio_loop)
dest = !dest;
if (dest == DEST_NETWORK) {
patch_payload(endp->net_payload_type, buf, rc);
return udp_send(fd->fd, &endp->remote,
proto == PROTO_RTP ? endp->net_rtp : endp->net_rtcp,
buf, rc);
} else {
patch_payload(endp->bts_payload_type, buf, rc);
return udp_send(fd->fd, &endp->bts,
proto == PROTO_RTP ? endp->bts_rtp : endp->bts_rtcp,
buf, rc);
}
}
static int create_bind(const char *source_addr, struct bsc_fd *fd, int port)
{
struct sockaddr_in addr;
int on = 1;
fd->fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd->fd < 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to create UDP port.\n");
return -1;
}
setsockopt(fd->fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
inet_aton(source_addr, &addr.sin_addr);
if (bind(fd->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
return -1;
}
return 0;
}
static int bind_rtp(struct mgcp_endpoint *endp)
{
struct mgcp_config *cfg = endp->cfg;
if (create_bind(cfg->source_addr, &endp->local_rtp, endp->rtp_port) != 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to create RTP port: %s:%d on 0x%x\n",
cfg->source_addr, endp->rtp_port, ENDPOINT_NUMBER(endp));
goto cleanup0;
}
if (create_bind(cfg->source_addr, &endp->local_rtcp, endp->rtp_port + 1) != 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to create RTCP port: %s:%d on 0x%x\n",
cfg->source_addr, endp->rtp_port + 1, ENDPOINT_NUMBER(endp));
goto cleanup1;
}
endp->local_rtp.cb = rtp_data_cb;
endp->local_rtp.data = endp;
endp->local_rtp.when = BSC_FD_READ;
if (bsc_register_fd(&endp->local_rtp) != 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to register RTP port %d on 0x%x\n",
endp->rtp_port, ENDPOINT_NUMBER(endp));
goto cleanup2;
}
endp->local_rtcp.cb = rtp_data_cb;
endp->local_rtcp.data = endp;
endp->local_rtcp.when = BSC_FD_READ;
if (bsc_register_fd(&endp->local_rtcp) != 0) {
LOGP(DMGCP, LOGL_ERROR, "Failed to register RTCP port %d on 0x%x\n",
endp->rtp_port + 1, ENDPOINT_NUMBER(endp));
goto cleanup3;
}
return 0;
cleanup3:
bsc_unregister_fd(&endp->local_rtp);
cleanup2:
close(endp->local_rtcp.fd);
endp->local_rtcp.fd = -1;
cleanup1:
close(endp->local_rtp.fd);
endp->local_rtp.fd = -1;
cleanup0:
return -1;
}
int mgcp_bind_rtp_port(struct mgcp_endpoint *endp, int rtp_port)
{
endp->rtp_port = rtp_port;
return bind_rtp(endp);
}

763
openbsc/src/mgcp/mgcp_protocol.c
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File diff suppressed because it is too large Load Diff

339
openbsc/src/mgcp/mgcp_vty.c Normal file
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@ -0,0 +1,339 @@
/* A Media Gateway Control Protocol Media Gateway: RFC 3435 */
/* The protocol implementation */
/*
* (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2009-2010 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <sys/types.h>
#include <osmocore/talloc.h>
#include <openbsc/debug.h>
#include <openbsc/mgcp.h>
#include <openbsc/mgcp_internal.h>
#include <vty/command.h>
#include <vty/vty.h>
static struct mgcp_config *g_cfg = NULL;
/*
* vty code for mgcp below
*/
struct cmd_node mgcp_node = {
MGCP_NODE,
"%s(mgcp)#",
1,
};
static int config_write_mgcp(struct vty *vty)
{
vty_out(vty, "mgcp%s", VTY_NEWLINE);
if (g_cfg->local_ip)
vty_out(vty, " local ip %s%s", g_cfg->local_ip, VTY_NEWLINE);
if (g_cfg->bts_ip)
vty_out(vty, " bts ip %s%s", g_cfg->bts_ip, VTY_NEWLINE);
vty_out(vty, " bind ip %s%s", g_cfg->source_addr, VTY_NEWLINE);
vty_out(vty, " bind port %u%s", g_cfg->source_port, VTY_NEWLINE);
vty_out(vty, " bind early %u%s", !!g_cfg->early_bind, VTY_NEWLINE);
vty_out(vty, " rtp base %u%s", g_cfg->rtp_base_port, VTY_NEWLINE);
vty_out(vty, " sdp audio payload number %u%s", g_cfg->audio_payload, VTY_NEWLINE);
vty_out(vty, " sdp audio payload name %s%s", g_cfg->audio_name, VTY_NEWLINE);
vty_out(vty, " loop %u%s", !!g_cfg->audio_loop, VTY_NEWLINE);
vty_out(vty, " endpoints %u%s", g_cfg->number_endpoints, VTY_NEWLINE);
if (g_cfg->forward_ip)
vty_out(vty, " forward audio ip %s%s", g_cfg->forward_ip, VTY_NEWLINE);
if (g_cfg->forward_port != 0)
vty_out(vty, " forward audio port %d%s", g_cfg->forward_port, VTY_NEWLINE);
return CMD_SUCCESS;
}
DEFUN(show_mcgp, show_mgcp_cmd, "show mgcp",
SHOW_STR "Display information about the MGCP Media Gateway")
{
int i;
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%s",
i, endp->ci,
ntohs(endp->net_rtp), ntohs(endp->net_rtcp),
ntohs(endp->bts_rtp), ntohs(endp->bts_rtcp), VTY_NEWLINE);
}
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp,
cfg_mgcp_cmd,
"mgcp",
"Configure the MGCP")
{
vty->node = MGCP_NODE;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_local_ip,
cfg_mgcp_local_ip_cmd,
"local ip IP",
"Set the IP to be used in SDP records")
{
if (g_cfg->local_ip)
talloc_free(g_cfg->local_ip);
g_cfg->local_ip = talloc_strdup(g_cfg, argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_bts_ip,
cfg_mgcp_bts_ip_cmd,
"bts ip IP",
"Set the IP of the BTS for RTP forwarding")
{
if (g_cfg->bts_ip)
talloc_free(g_cfg->bts_ip);
g_cfg->bts_ip = talloc_strdup(g_cfg, argv[0]);
inet_aton(g_cfg->bts_ip, &g_cfg->bts_in);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_bind_ip,
cfg_mgcp_bind_ip_cmd,
"bind ip IP",
"Bind the MGCP to this local addr")
{
if (g_cfg->source_addr)
talloc_free(g_cfg->source_addr);
g_cfg->source_addr = talloc_strdup(g_cfg, argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_bind_port,
cfg_mgcp_bind_port_cmd,
"bind port <0-65534>",
"Bind the MGCP to this port")
{
unsigned int port = atoi(argv[0]);
if (port > 65534) {
vty_out(vty, "%% wrong bind port '%s'%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
g_cfg->source_port = port;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_bind_early,
cfg_mgcp_bind_early_cmd,
"bind early (0|1)",
"Bind all RTP ports early")
{
unsigned int bind = atoi(argv[0]);
if (bind != 0 && bind != 1) {
vty_out(vty, "%% param must be 0 or 1.%s", VTY_NEWLINE);
return CMD_WARNING;
}
g_cfg->early_bind = bind == 1;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_rtp_base_port,
cfg_mgcp_rtp_base_port_cmd,
"rtp base <0-65534>",
"Base port to use")
{
unsigned int port = atoi(argv[0]);
if (port > 65534) {
vty_out(vty, "%% wrong base port '%s'%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
g_cfg->rtp_base_port = port;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_sdp_payload_number,
cfg_mgcp_sdp_payload_number_cmd,
"sdp audio payload number <1-255>",
"Set the audio codec to use")
{
unsigned int payload = atoi(argv[0]);
if (payload > 255) {
vty_out(vty, "%% wrong payload number '%s'%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
g_cfg->audio_payload = payload;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_sdp_payload_name,
cfg_mgcp_sdp_payload_name_cmd,
"sdp audio payload name NAME",
"Set the audio name to use")
{
if (g_cfg->audio_name)
talloc_free(g_cfg->audio_name);
g_cfg->audio_name = talloc_strdup(g_cfg, argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_loop,
cfg_mgcp_loop_cmd,
"loop (0|1)",
"Loop the audio")
{
g_cfg->audio_loop = atoi(argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_number_endp,
cfg_mgcp_number_endp_cmd,
"number endpoints <0-65534>",
"The number of endpoints to allocate. This is not dynamic.")
{
/* + 1 as we start counting at one */
g_cfg->number_endpoints = atoi(argv[0]) + 1;
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_forward_ip,
cfg_mgcp_forward_ip_cmd,
"forward audio ip IP",
"Forward packets from and to the IP. This disables most of the MGCP feature.")
{
if (g_cfg->forward_ip)
talloc_free(g_cfg->forward_ip);
g_cfg->forward_ip = talloc_strdup(g_cfg, argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_mgcp_forward_port,
cfg_mgcp_forward_port_cmd,
"forward audio port <1-15000>",
"Forward packets from and to the port. This disables most of the MGCP feature.")
{
g_cfg->forward_port = atoi(argv[0]);
return CMD_SUCCESS;
}
int mgcp_vty_init(void)
{
install_element(VIEW_NODE, &show_mgcp_cmd);
install_element(CONFIG_NODE, &cfg_mgcp_cmd);
install_node(&mgcp_node, config_write_mgcp);
install_default(MGCP_NODE);
install_element(MGCP_NODE, &cfg_mgcp_local_ip_cmd);
install_element(MGCP_NODE, &cfg_mgcp_bts_ip_cmd);
install_element(MGCP_NODE, &cfg_mgcp_bind_ip_cmd);
install_element(MGCP_NODE, &cfg_mgcp_bind_port_cmd);
install_element(MGCP_NODE, &cfg_mgcp_bind_early_cmd);
install_element(MGCP_NODE, &cfg_mgcp_rtp_base_port_cmd);
install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_number_cmd);
install_element(MGCP_NODE, &cfg_mgcp_sdp_payload_name_cmd);
install_element(MGCP_NODE, &cfg_mgcp_loop_cmd);
install_element(MGCP_NODE, &cfg_mgcp_number_endp_cmd);
install_element(MGCP_NODE, &cfg_mgcp_forward_ip_cmd);
install_element(MGCP_NODE, &cfg_mgcp_forward_port_cmd);
return 0;
}
int mgcp_parse_config(const char *config_file, struct mgcp_config *cfg)
{
int i, rc;
g_cfg = cfg;
rc = vty_read_config_file(config_file);
if (rc < 0) {
fprintf(stderr, "Failed to parse the config file: '%s'\n", config_file);
return rc;
}
if (!g_cfg->bts_ip)
fprintf(stderr, "No BTS ip address specified. This will allow everyone to connect.\n");
if (mgcp_endpoints_allocate(g_cfg) != 0) {
fprintf(stderr, "Failed to allocate endpoints: %d. Quitting.\n", g_cfg->number_endpoints);
return -1;
}
/*
* This application supports two modes.
* 1.) a true MGCP gateway with support for AUEP, CRCX, MDCX, DLCX
* 2.) plain forwarding of RTP packets on the endpoints.
* both modes are mutual exclusive
*/
if (g_cfg->forward_ip) {
int port = g_cfg->rtp_base_port;
if (g_cfg->forward_port != 0)
port = g_cfg->forward_port;
if (!g_cfg->early_bind) {
LOGP(DMGCP, LOGL_NOTICE, "Forwarding requires early bind.\n");
return -1;
}
/*
* Store the forward IP and assign a ci. For early bind
* the sockets will be created after this.
*/
for (i = 1; i < g_cfg->number_endpoints; ++i) {
struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
inet_aton(g_cfg->forward_ip, &endp->remote);
endp->ci = CI_UNUSED + 23;
endp->net_rtp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port));
endp->net_rtcp = htons(rtp_calculate_port(ENDPOINT_NUMBER(endp), port) + 1);
}
LOGP(DMGCP, LOGL_NOTICE, "Configured for Audio Forwarding.\n");
}
/* early bind */
if (g_cfg->early_bind) {
for (i = 1; i < g_cfg->number_endpoints; ++i) {
struct mgcp_endpoint *endp = &g_cfg->endpoints[i];
int rtp_port;
rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), g_cfg->rtp_base_port);
if (mgcp_bind_rtp_port(endp, rtp_port) != 0) {
LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", rtp_port);
return -1;
}
}
}
return !!g_cfg->forward_ip;
}
struct gsm_network;
int bsc_vty_init(struct gsm_network *dummy)
{
cmd_init(1);
vty_init();
mgcp_vty_init();
return 0;
}