diff options
| -rw-r--r-- | openbsc/include/openbsc/Makefile.am | 2 | ||||
| -rw-r--r-- | openbsc/include/openbsc/mgcp.h | 72 | ||||
| -rw-r--r-- | openbsc/include/openbsc/mgcp_internal.h | 64 | ||||
| -rw-r--r-- | openbsc/src/Makefile.am | 3 | ||||
| -rw-r--r-- | openbsc/src/mgcp/mgcp_main.c | 30 | ||||
| -rw-r--r-- | openbsc/src/mgcp/mgcp_network.c | 255 | ||||
| -rw-r--r-- | openbsc/src/mgcp/mgcp_protocol.c | 757 | ||||
| -rw-r--r-- | openbsc/src/mgcp/mgcp_vty.c | 339 |
8 files changed, 911 insertions, 611 deletions
diff --git a/openbsc/include/openbsc/Makefile.am b/openbsc/include/openbsc/Makefile.am index 234354906..483997a9d 100644 --- a/openbsc/include/openbsc/Makefile.am +++ b/openbsc/include/openbsc/Makefile.am @@ -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 diff --git a/openbsc/include/openbsc/mgcp.h b/openbsc/include/openbsc/mgcp.h index 2416fadec..f7e800bd8 100644 --- a/openbsc/include/openbsc/mgcp.h +++ b/openbsc/include/openbsc/mgcp.h @@ -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 diff --git a/openbsc/include/openbsc/mgcp_internal.h b/openbsc/include/openbsc/mgcp_internal.h new file mode 100644 index 000000000..10d0ca6ae --- /dev/null +++ b/openbsc/include/openbsc/mgcp_internal.h @@ -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 diff --git a/openbsc/src/Makefile.am b/openbsc/src/Makefile.am index cfe025e48..5dac9debd 100644 --- a/openbsc/src/Makefile.am +++ b/openbsc/src/Makefile.am @@ -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 diff --git a/openbsc/src/mgcp/mgcp_main.c b/openbsc/src/mgcp/mgcp_main.c index b8d892b08..cea0ba427 100644 --- a/openbsc/src/mgcp/mgcp_main.c +++ b/openbsc/src/mgcp/mgcp_main.c @@ -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"); diff --git a/openbsc/src/mgcp/mgcp_network.c b/openbsc/src/mgcp/mgcp_network.c new file mode 100644 index 000000000..b76ca4732 --- /dev/null +++ b/openbsc/src/mgcp/mgcp_network.c @@ -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); +} diff --git a/openbsc/src/mgcp/mgcp_protocol.c b/openbsc/src/mgcp/mgcp_protocol.c index 154920271..f7ef5470d 100644 --- a/openbsc/src/mgcp/mgcp_protocol.c +++ b/openbsc/src/mgcp/mgcp_protocol.c @@ -2,8 +2,8 @@ /* The protocol implementation */ /* - * (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 @@ -30,35 +30,13 @@ #include <limits.h> #include <unistd.h> -#include <sys/socket.h> -#include <arpa/inet.h> - #include <openbsc/debug.h> #include <osmocore/msgb.h> #include <osmocore/talloc.h> #include <openbsc/gsm_data.h> #include <osmocore/select.h> #include <openbsc/mgcp.h> -#include <openbsc/telnet_interface.h> - -#include <vty/command.h> -#include <vty/vty.h> - -#warning "Make use of the rtp proxy code" - -static int source_port = 2427; -static const char *local_ip = NULL; -static const char *source_addr = "0.0.0.0"; -static unsigned int number_endpoints = 0; -static const char *bts_ip = NULL; -static struct in_addr bts_in; -static const char *audio_name = "GSM-EFR/8000"; -static int audio_payload = 97; -static int audio_loop = 0; -static int early_bind = 0; - -static char *forward_ip = NULL; -static int forward_port = 0; +#include <openbsc/mgcp_internal.h> enum mgcp_connection_mode { MGCP_CONN_NONE = 0, @@ -67,47 +45,6 @@ enum mgcp_connection_mode { MGCP_CONN_RECV_SEND = MGCP_CONN_RECV_ONLY | MGCP_CONN_SEND_ONLY, }; -enum { - DEST_NETWORK = 0, - DEST_BTS = 1, -}; - -enum { - PROTO_RTP, - PROTO_RTCP, -}; - -#define CI_UNUSED 0 -static unsigned int last_call_id = 0; - -struct mgcp_endpoint { - int ci; - char *callid; - char *local_options; - int conn_mode; - - /* 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; -}; - -static struct mgcp_endpoint *endpoints = NULL; -#define ENDPOINT_NUMBER(endp) abs(endp - endpoints) - /** * Macro for tokenizing MGCP messages and SDP in one go. * @@ -150,39 +87,36 @@ struct mgcp_msg_ptr { struct mgcp_request { char *name; - struct msgb *(*handle_request) (struct msgb *msg); + struct msgb *(*handle_request) (struct mgcp_config *cfg, struct msgb *msg); char *debug_name; }; #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, -static struct msgb *handle_audit_endpoint(struct msgb *msg); -static struct msgb *handle_create_con(struct msgb *msg); -static struct msgb *handle_delete_con(struct msgb *msg); -static struct msgb *handle_modify_con(struct msgb *msg); - -static mgcp_change change_cb; -static void *change_cb_data; +static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg); +static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg); +static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg); +static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg); -static int generate_call_id() +static int generate_call_id(struct mgcp_config *cfg) { int i; /* use the call id */ - ++last_call_id; + ++cfg->last_call_id; /* handle wrap around */ - if (last_call_id == CI_UNUSED) - ++last_call_id; + if (cfg->last_call_id == CI_UNUSED) + ++cfg->last_call_id; /* callstack can only be of size number_of_endpoints */ /* verify that the call id is free, e.g. in case of overrun */ - for (i = 1; i < number_endpoints; ++i) - if (endpoints[i].ci == last_call_id) - return generate_call_id(); + for (i = 1; i < cfg->number_endpoints; ++i) + if (cfg->endpoints[i].ci == cfg->last_call_id) + return generate_call_id(cfg); - return last_call_id; + return cfg->last_call_id; } /* FIXIME/TODO: need to have a list of pending transactions and check that */ @@ -191,164 +125,6 @@ static unsigned int generate_transaction_id() return abs(rand()); } -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)); -} - -/* - * 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; - int rc, dest, proto; - - endp = (struct mgcp_endpoint *) fd->data; - - 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 || forward_ip)) { - /* it was the BTS... */ - if (!bts_ip || memcmp(&addr.sin_addr, &bts_in, sizeof(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 (audio_loop) - dest = !dest; - - if (dest == DEST_NETWORK) { - return udp_send(fd->fd, &endp->remote, - proto == PROTO_RTP ? endp->net_rtp : endp->net_rtcp, - buf, rc); - } else { - return udp_send(fd->fd, &endp->bts, - proto == PROTO_RTP ? endp->bts_rtp : endp->bts_rtcp, - buf, rc); - } -} - -static int create_bind(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) -{ - if (create_bind(&endp->local_rtp, endp->rtp_port) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to create RTP port: %s:%d on 0x%x\n", - source_addr, endp->rtp_port, ENDPOINT_NUMBER(endp)); - goto cleanup0; - } - - if (create_bind(&endp->local_rtcp, endp->rtp_port + 1) != 0) { - LOGP(DMGCP, LOGL_ERROR, "Failed to create RTCP port: %s:%d on 0x%x\n", - 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; -} - /* * array of function pointers for handling various * messages. In the future this might be binary sorted @@ -371,7 +147,7 @@ static struct msgb *mgcp_msgb_alloc(void) return msg; } -static struct msgb *send_response_with_data(int code, const char *msg, const char *trans, +struct msgb *mgcp_create_response_with_data(int code, const char *msg, const char *trans, const char *data) { int len; @@ -388,22 +164,23 @@ static struct msgb *send_response_with_data(int code, const char *msg, const cha } res->l2h = msgb_put(res, len); - LOGP(DMGCP, LOGL_NOTICE, "Sending response: code: %d for '%s'\n", code, res->l2h); + LOGP(DMGCP, LOGL_DEBUG, "Sending response: code: %d for '%s'\n", code, res->l2h); return res; } -static struct msgb *send_response(int code, const char *msg, const char *trans) +static struct msgb *create_response(int code, const char *msg, const char *trans) { - return send_response_with_data(code, msg, trans, NULL); + return mgcp_create_response_with_data(code, msg, trans, NULL); } -static struct msgb *send_with_sdp(struct mgcp_endpoint *endp, const char *msg, const char *trans_id) +static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, + const char *msg, const char *trans_id) { - const char *addr = local_ip; + const char *addr = endp->cfg->local_ip; char sdp_record[4096]; if (!addr) - addr = source_addr; + addr = endp->cfg->source_addr; snprintf(sdp_record, sizeof(sdp_record) - 1, "I: %d\n\n" @@ -412,8 +189,9 @@ static struct msgb *send_with_sdp(struct mgcp_endpoint *endp, const char *msg, c "m=audio %d RTP/AVP %d\r\n" "a=rtpmap:%d %s\r\n", endp->ci, addr, endp->rtp_port, - audio_payload, audio_payload, audio_name); - return send_response_with_data(200, msg, trans_id, sdp_record); + endp->bts_payload_type, endp->bts_payload_type, + endp->cfg->audio_name); + return mgcp_create_response_with_data(200, msg, trans_id, sdp_record); } /* send a static record */ @@ -438,7 +216,7 @@ struct msgb *mgcp_create_rsip(void) * - this can be a command (four letters, space, transaction id) * - or a response (three numbers, space, transaction id) */ -struct msgb *mgcp_handle_message(struct msgb *msg) +struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg) { int code; struct msgb *resp = NULL; @@ -450,14 +228,14 @@ struct msgb *mgcp_handle_message(struct msgb *msg) /* attempt to treat it as a response */ if (sscanf((const char *)&msg->data[0], "%3d %*s", &code) == 1) { - LOGP(DMGCP, LOGL_NOTICE, "Response: Code: %d\n", code); + LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); } else { int i, handled = 0; msg->l3h = &msg->l2h[4]; for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) if (strncmp(mgcp_requests[i].name, (const char *) &msg->data[0], 4) == 0) { handled = 1; - resp = mgcp_requests[i].handle_request(msg); + resp = mgcp_requests[i].handle_request(cfg, msg); break; } if (!handled) { @@ -504,25 +282,28 @@ static int find_msg_pointers(struct msgb *msg, struct mgcp_msg_ptr *ptrs, int pt return found; } -static struct mgcp_endpoint *find_endpoint(const char *mgcp) +static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg, const char *mgcp) { char *endptr = NULL; unsigned int gw = INT_MAX; gw = strtoul(mgcp, &endptr, 16); - if (gw == 0 || gw >= number_endpoints || strcmp(endptr, "@mgw") != 0) { + if (gw == 0 || gw >= cfg->number_endpoints || strcmp(endptr, "@mgw") != 0) { LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); return NULL; } - return &endpoints[gw]; + return &cfg->endpoints[gw]; } -static int analyze_header(struct msgb *msg, struct mgcp_msg_ptr *ptr, int size, +static int 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 found; + *transaction_id = "000000"; + if (size < 3) { LOGP(DMGCP, LOGL_ERROR, "Not enough space in ptr\n"); return -1; @@ -530,7 +311,7 @@ static int analyze_header(struct msgb *msg, struct mgcp_msg_ptr *ptr, int size, found = find_msg_pointers(msg, ptr, size); - if (found < 3) { + if (found <= 3) { LOGP(DMGCP, LOGL_ERROR, "Gateway: Not enough params. Found: %d\n", found); return -1; } @@ -553,7 +334,7 @@ static int analyze_header(struct msgb *msg, struct mgcp_msg_ptr *ptr, int size, } *transaction_id = (const char *)&msg->l3h[ptr[0].start]; - *endp = find_endpoint((const char *)&msg->l3h[ptr[1].start]); + *endp = find_endpoint(cfg, (const char *)&msg->l3h[ptr[1].start]); return *endp == NULL; } @@ -581,20 +362,20 @@ static int verify_ci(const struct mgcp_endpoint *endp, return 0; } -static struct msgb *handle_audit_endpoint(struct msgb *msg) +static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg) { struct mgcp_msg_ptr data_ptrs[6]; int found, response; const char *trans_id; struct mgcp_endpoint *endp; - found = analyze_header(msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); + found = analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); if (found != 0) response = 500; else response = 200; - return send_response(response, "AUEP", trans_id); + return create_response(response, "AUEP", trans_id); } static int parse_conn_mode(const char* msg, int *conn_mode) @@ -612,32 +393,33 @@ static int parse_conn_mode(const char* msg, int *conn_mode) return ret; } -static struct msgb *handle_create_con(struct msgb *msg) +static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg) { struct mgcp_msg_ptr data_ptrs[6]; int found, i, line_start; const char *trans_id; struct mgcp_endpoint *endp; int error_code = 500; + int port; - found = analyze_header(msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); + found = analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); if (found != 0) - return send_response(500, "CRCX", trans_id); + return create_response(500, "CRCX", trans_id); if (endp->ci != CI_UNUSED) { LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", ENDPOINT_NUMBER(endp)); - return send_response(500, "CRCX", trans_id); + return create_response(500, "CRCX", trans_id); } /* parse CallID C: and LocalParameters L: */ MSG_TOKENIZE_START switch (msg->l3h[line_start]) { case 'L': - endp->local_options = talloc_strdup(endpoints, + endp->local_options = talloc_strdup(cfg->endpoints, (const char *)&msg->l3h[line_start + 3]); break; case 'C': - endp->callid = talloc_strdup(endpoints, + endp->callid = talloc_strdup(cfg->endpoints, (const char *)&msg->l3h[line_start + 3]); break; case 'M': @@ -662,33 +444,56 @@ static struct msgb *handle_create_con(struct msgb *msg) memset(&endp->remote, 0, sizeof(endp->remote)); /* bind to the port now */ - endp->rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), rtp_base_port); - if (!early_bind && bind_rtp(endp) != 0) + port = rtp_calculate_port(ENDPOINT_NUMBER(endp), cfg->rtp_base_port); + if (cfg->early_bind) + endp->rtp_port = port; + else if (mgcp_bind_rtp_port(endp, port) != 0) goto error2; /* assign a local call identifier or fail */ - endp->ci = generate_call_id(); + endp->ci = generate_call_id(cfg); if (endp->ci == CI_UNUSED) goto error2; + endp->bts_payload_type = cfg->audio_payload; + + /* policy CB */ + if (cfg->policy_cb) { + switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) { + case MGCP_POLICY_REJECT: + LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", + ENDPOINT_NUMBER(endp)); + mgcp_free_endp(endp); + return create_response(500, "CRCX", trans_id); + break; + case MGCP_POLICY_DEFER: + /* stop processing */ + return NULL; + break; + case MGCP_POLICY_CONT: + /* just continue */ + break; + } + } + LOGP(DMGCP, LOGL_NOTICE, "Creating endpoint on: 0x%x CI: %u port: %u\n", ENDPOINT_NUMBER(endp), endp->ci, endp->rtp_port); - if (change_cb) - change_cb(ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, endp->rtp_port, change_cb_data); + if (cfg->change_cb) + cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, endp->rtp_port); - return send_with_sdp(endp, "CRCX", trans_id); + return create_response_with_sdp(endp, "CRCX", trans_id); error: LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", hexdump(msg->l3h, msgb_l3len(msg)), ENDPOINT_NUMBER(endp), line_start, i); - return send_response(error_code, "CRCX", trans_id); + return create_response(error_code, "CRCX", trans_id); error2: LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); - return send_response(error_code, "CRCX", trans_id); + return create_response(error_code, "CRCX", trans_id); } -static struct msgb *handle_modify_con(struct msgb *msg) +static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg) { struct mgcp_msg_ptr data_ptrs[6]; int found, i, line_start; @@ -696,13 +501,13 @@ static struct msgb *handle_modify_con(struct msgb *msg) struct mgcp_endpoint *endp; int error_code = 500; - found = analyze_header(msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); + found = analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); if (found != 0) - return send_response(error_code, "MDCX", trans_id); + return create_response(error_code, "MDCX", trans_id); if (endp->ci == CI_UNUSED) { LOGP(DMGCP, LOGL_ERROR, "Endpoint is not holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); - return send_response(error_code, "MDCX", trans_id); + return create_response(error_code, "MDCX", trans_id); } MSG_TOKENIZE_START @@ -739,11 +544,13 @@ static struct msgb *handle_modify_con(struct msgb *msg) break; case 'm': { int port; + int payload; const char *param = (const char *)&msg->l3h[line_start]; - if (sscanf(param, "m=audio %d RTP/AVP %*d", &port) == 1) { + if (sscanf(param, "m=audio %d RTP/AVP %d", &port, &payload) == 2) { endp->net_rtp = htons(port); endp->net_rtcp = htons(port + 1); + endp->net_payload_type = payload; } break; } @@ -764,24 +571,42 @@ static struct msgb *handle_modify_con(struct msgb *msg) } MSG_TOKENIZE_END + /* policy CB */ + if (cfg->policy_cb) { + switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) { + case MGCP_POLICY_REJECT: + LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", + ENDPOINT_NUMBER(endp)); + return create_response(500, "MDCX", trans_id); + break; + case MGCP_POLICY_DEFER: + /* stop processing */ + return NULL; + break; + case MGCP_POLICY_CONT: + /* just continue */ + break; + } + } + /* modify */ LOGP(DMGCP, LOGL_NOTICE, "Modified endpoint on: 0x%x Server: %s:%u\n", - ENDPOINT_NUMBER(endp), inet_ntoa(endp->remote), endp->net_rtp); - if (change_cb) - change_cb(ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, endp->rtp_port, change_cb_data); - return send_with_sdp(endp, "MDCX", trans_id); + ENDPOINT_NUMBER(endp), inet_ntoa(endp->remote), ntohs(endp->net_rtp)); + if (cfg->change_cb) + cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, endp->rtp_port); + return create_response_with_sdp(endp, "MDCX", trans_id); error: LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d %d\n", hexdump(msg->l3h, msgb_l3len(msg)), ENDPOINT_NUMBER(endp), line_start, i, msg->l3h[line_start]); - return send_response(error_code, "MDCX", trans_id); + return create_response(error_code, "MDCX", trans_id); error3: - return send_response(error_code, "MDCX", trans_id); + return create_response(error_code, "MDCX", trans_id); } -static struct msgb *handle_delete_con(struct msgb *msg) +static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg) { struct mgcp_msg_ptr data_ptrs[6]; int found, i, line_start; @@ -789,13 +614,13 @@ static struct msgb *handle_delete_con(struct msgb *msg) struct mgcp_endpoint *endp; int error_code = 500; - found = analyze_header(msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); + found = analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); if (found != 0) - return send_response(error_code, "DLCX", trans_id); + return create_response(error_code, "DLCX", trans_id); if (endp->ci == CI_UNUSED) { LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); - return send_response(error_code, "DLCX", trans_id); + return create_response(error_code, "DLCX", trans_id); } MSG_TOKENIZE_START @@ -818,327 +643,103 @@ static struct msgb *handle_delete_con(struct msgb *msg) } MSG_TOKENIZE_END - - /* free the connection */ - LOGP(DMGCP, LOGL_NOTICE, "Deleting endpoint on: 0x%x\n", ENDPOINT_NUMBER(endp)); - endp->ci= CI_UNUSED; - talloc_free(endp->callid); - talloc_free(endp->local_options); - - if (!early_bind) { - bsc_unregister_fd(&endp->local_rtp); - bsc_unregister_fd(&endp->local_rtcp); + /* policy CB */ + if (cfg->policy_cb) { + switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) { + case MGCP_POLICY_REJECT: + LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", + ENDPOINT_NUMBER(endp)); + return create_response(500, "DLCX", trans_id); + break; + case MGCP_POLICY_DEFER: + /* stop processing */ + return NULL; + break; + case MGCP_POLICY_CONT: + /* just continue */ + break; + } } - endp->net_rtp = endp->net_rtcp = endp->bts_rtp = endp->bts_rtcp = 0; - if (change_cb) - change_cb(ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, endp->rtp_port, change_cb_data); + /* free the connection */ + mgcp_free_endp(endp); + if (cfg->change_cb) + cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, endp->rtp_port); - return send_response(250, "DLCX", trans_id); + return create_response(250, "DLCX", trans_id); error: LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", hexdump(msg->l3h, msgb_l3len(msg)), ENDPOINT_NUMBER(endp), line_start, i); - return send_response(error_code, "DLCX", trans_id); + return create_response(error_code, "DLCX", trans_id); error3: - return send_response(error_code, "DLCX", trans_id); -} - -/* - * 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 (local_ip) - vty_out(vty, " local ip %s%s", local_ip, VTY_NEWLINE); - if (bts_ip) - vty_out(vty, " bts ip %s%s", bts_ip, VTY_NEWLINE); - vty_out(vty, " bind ip %s%s", source_addr, VTY_NEWLINE); - vty_out(vty, " bind port %u%s", source_port, VTY_NEWLINE); - vty_out(vty, " bind early %u%s", !!early_bind, VTY_NEWLINE); - vty_out(vty, " rtp base %u%s", rtp_base_port, VTY_NEWLINE); - vty_out(vty, " sdp audio payload number %u%s", audio_payload, VTY_NEWLINE); - vty_out(vty, " sdp audio payload name %s%s", audio_name, VTY_NEWLINE); - vty_out(vty, " loop %u%s", !!audio_loop, VTY_NEWLINE); - vty_out(vty, " endpoints %u%s", number_endpoints, VTY_NEWLINE); - if (forward_ip) - vty_out(vty, " forward audio ip %s%s", forward_ip, VTY_NEWLINE); - if (forward_port != 0) - vty_out(vty, " forward audio port %d%s", 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", number_endpoints - 1, VTY_NEWLINE); - for (i = 1; i < number_endpoints; ++i) { - struct mgcp_endpoint *endp = &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; + return create_response(error_code, "DLCX", trans_id); } -DEFUN(cfg_mgcp_local_ip, - cfg_mgcp_local_ip_cmd, - "local ip IP", - "Set the IP to be used in SDP records") +struct mgcp_config *mgcp_config_alloc(void) { - local_ip = talloc_strdup(tall_bsc_ctx, 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") -{ - bts_ip = talloc_strdup(tall_bsc_ctx, argv[0]); - inet_aton(bts_ip, &bts_in); - return CMD_SUCCESS; -} + struct mgcp_config *cfg; -DEFUN(cfg_mgcp_bind_ip, - cfg_mgcp_bind_ip_cmd, - "bind ip IP", - "Bind the MGCP to this local addr") -{ - source_addr = talloc_strdup(tall_bsc_ctx, 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; + cfg = talloc_zero(NULL, struct mgcp_config); + if (!cfg) { + LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); + return NULL; } - source_port = port; - return CMD_SUCCESS; -} + cfg->source_port = 2427; + cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); + cfg->audio_name = talloc_strdup(cfg, "GSM-EFR/8000"); + cfg->audio_payload = 97; + cfg->rtp_base_port = RTP_PORT_DEFAULT; -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; - } - - early_bind = bind == 1; - return CMD_SUCCESS; + return cfg; } -DEFUN(cfg_mgcp_rtp_base_port, - cfg_mgcp_rtp_base_port_cmd, - "rtp base <0-65534>", - "Base port to use") +int mgcp_endpoints_allocate(struct mgcp_config *cfg) { - unsigned int port = atoi(argv[0]); - if (port > 65534) { - vty_out(vty, "%% wrong base port '%s'%s", argv[0], VTY_NEWLINE); - return CMD_WARNING; - } + int i; - rtp_base_port = port; - return CMD_SUCCESS; -} + /* Initialize all endpoints */ + cfg->endpoints = _talloc_zero_array(cfg, + sizeof(struct mgcp_endpoint), + cfg->number_endpoints, "endpoints"); + if (!cfg->endpoints) + return -1; -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; + for (i = 0; i < cfg->number_endpoints; ++i) { + cfg->endpoints[i].local_rtp.fd = -1; + cfg->endpoints[i].local_rtcp.fd = -1; + cfg->endpoints[i].ci = CI_UNUSED; + cfg->endpoints[i].cfg = cfg; + cfg->endpoints[i].net_payload_type = -1; + cfg->endpoints[i].bts_payload_type = -1; } - 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") -{ - audio_name = talloc_strdup(tall_bsc_ctx, argv[0]); - return CMD_SUCCESS; -} - -DEFUN(cfg_mgcp_loop, - cfg_mgcp_loop_cmd, - "loop (0|1)", - "Loop the audio") -{ - 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 */ - 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 (forward_ip) - talloc_free(forward_ip); - forward_ip = talloc_strdup(tall_bsc_ctx, 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.") -{ - 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 gsm_network *dummy_network) +void mgcp_free_endp(struct mgcp_endpoint *endp) { - int i, rc; - - 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 (!bts_ip) - fprintf(stderr, "No BTS ip address specified. This will allow everyone to connect.\n"); + LOGP(DMGCP, LOGL_NOTICE, "Deleting endpoint on: 0x%x\n", ENDPOINT_NUMBER(endp)); + endp->ci= CI_UNUSED; - endpoints = _talloc_zero_array(tall_bsc_ctx, - sizeof(struct mgcp_endpoint), - number_endpoints, "endpoints"); - if (!endpoints) { - fprintf(stderr, "Failed to allocate endpoints: %d. Quitting.\n", number_endpoints); - return -1; + if (endp->callid) { + talloc_free(endp->callid); + endp->callid = NULL; } - /* Initialize all endpoints */ - for (i = 0; i < number_endpoints; ++i) { - endpoints[i].local_rtp.fd = -1; - endpoints[i].local_rtcp.fd = -1; - endpoints[i].ci = CI_UNUSED; + if (endp->local_options) { + talloc_free(endp->local_options); + endp->callid = NULL; } - /* - * 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 (forward_ip) { - int port = rtp_base_port; - if (forward_port != 0) - port = forward_port; - - if (!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 < number_endpoints; ++i) { - struct mgcp_endpoint *endp = &endpoints[i]; - inet_aton(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 (early_bind) { - for (i = 1; i < number_endpoints; ++i) { - struct mgcp_endpoint *endp = &endpoints[i]; - endp->rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), rtp_base_port); - if (bind_rtp(endp) != 0) { - LOGP(DMGCP, LOGL_FATAL, "Failed to bind: %d\n", endp->rtp_port); - return -1; - } - } + if (!endp->cfg->early_bind) { + bsc_unregister_fd(&endp->local_rtp); + bsc_unregister_fd(&endp->local_rtcp); } - return !!forward_ip; -} - -void mgcp_set_change_cb(mgcp_change cb, void *data) -{ - change_cb = cb; - change_cb_data = data; + endp->net_rtp = endp->net_rtcp = endp->bts_rtp = endp->bts_rtcp = 0; + endp->net_payload_type = endp->bts_payload_type = -1; } diff --git a/openbsc/src/mgcp/mgcp_vty.c b/openbsc/src/mgcp/mgcp_vty.c new file mode 100644 index 000000000..f13b3cfa7 --- /dev/null +++ b/openbsc/src/mgcp/mgcp_vty.c @@ -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; +} + |