| /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| /* The main method to drive it as a standalone process */ |
| |
| /* |
| * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * (C) 2009-2011 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 Affero General Public License as published by |
| * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <ctype.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <time.h> |
| #include <limits.h> |
| #include <unistd.h> |
| |
| #include <sys/socket.h> |
| |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/mgcp.h> |
| #include <openbsc/mgcp_internal.h> |
| #include <openbsc/vty.h> |
| |
| #include <osmocom/core/application.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/select.h> |
| |
| #include <osmocom/vty/telnet_interface.h> |
| #include <osmocom/vty/logging.h> |
| #include <osmocom/vty/ports.h> |
| #include <osmocom/vty/command.h> |
| |
| #include "../../bscconfig.h" |
| |
| #ifdef BUILD_MGCP_TRANSCODING |
| #include "openbsc/mgcp_transcode.h" |
| #endif |
| |
| #define _GNU_SOURCE |
| #include <getopt.h> |
| |
| #warning "Make use of the rtp proxy code" |
| |
| static struct mgcp_config *cfg; |
| static struct mgcp_trunk_config *reset_trunk; |
| static int reset_endpoints = 0; |
| static int daemonize = 0; |
| |
| const char *openbsc_copyright = |
| "Copyright (C) 2009-2010 Holger Freyther and On-Waves\r\n" |
| "Contributions by Daniel Willmann, Jan Lübbe, Stefan Schmidt\r\n" |
| "Dieter Spaar, Andreas Eversberg, Harald Welte\r\n\r\n" |
| "License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>\r\n" |
| "This is free software: you are free to change and redistribute it.\r\n" |
| "There is NO WARRANTY, to the extent permitted by law.\r\n"; |
| |
| static char *config_file = "mgcp.cfg"; |
| |
| /* used by msgb and mgcp */ |
| void *tall_bsc_ctx = NULL; |
| |
| static void print_help() |
| { |
| printf("Some useful help...\n"); |
| printf(" -h --help is printing this text.\n"); |
| printf(" -c --config-file filename The config file to use.\n"); |
| printf(" -s --disable-color\n"); |
| printf(" -D --daemonize Fork the process into a background daemon\n"); |
| printf(" -V --version Print the version number\n"); |
| } |
| |
| static void handle_options(int argc, char **argv) |
| { |
| while (1) { |
| int option_index = 0, c; |
| static struct option long_options[] = { |
| {"help", 0, 0, 'h'}, |
| {"config-file", 1, 0, 'c'}, |
| {"daemonize", 0, 0, 'D'}, |
| {"version", 0, 0, 'V'}, |
| {"disable-color", 0, 0, 's'}, |
| {0, 0, 0, 0}, |
| }; |
| |
| c = getopt_long(argc, argv, "hc:VD", long_options, &option_index); |
| |
| if (c == -1) |
| break; |
| |
| switch(c) { |
| case 'h': |
| print_help(); |
| exit(0); |
| break; |
| case 'c': |
| config_file = talloc_strdup(tall_bsc_ctx, optarg); |
| break; |
| case 's': |
| log_set_use_color(osmo_stderr_target, 0); |
| break; |
| case 'V': |
| print_version(1); |
| exit(0); |
| break; |
| case 'D': |
| daemonize = 1; |
| break; |
| default: |
| /* ignore */ |
| break; |
| }; |
| } |
| } |
| |
| /* simply remember this */ |
| static int mgcp_rsip_cb(struct mgcp_trunk_config *tcfg) |
| { |
| reset_endpoints = 1; |
| reset_trunk = tcfg; |
| |
| return 0; |
| } |
| |
| static int read_call_agent(struct osmo_fd *fd, unsigned int what) |
| { |
| struct sockaddr_in addr; |
| socklen_t slen = sizeof(addr); |
| struct msgb *msg; |
| struct msgb *resp; |
| int i; |
| |
| msg = (struct msgb *) fd->data; |
| |
| /* read one less so we can use it as a \0 */ |
| int rc = recvfrom(cfg->gw_fd.bfd.fd, msg->data, msg->data_len - 1, 0, |
| (struct sockaddr *) &addr, &slen); |
| if (rc < 0) { |
| perror("Gateway failed to read"); |
| return -1; |
| } else if (slen > sizeof(addr)) { |
| fprintf(stderr, "Gateway received message from outerspace: %zu %zu\n", |
| (size_t) slen, sizeof(addr)); |
| return -1; |
| } |
| |
| /* handle message now */ |
| msg->l2h = msgb_put(msg, rc); |
| resp = mgcp_handle_message(cfg, msg); |
| msgb_reset(msg); |
| |
| if (resp) { |
| sendto(cfg->gw_fd.bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr)); |
| msgb_free(resp); |
| } |
| |
| if (reset_endpoints) { |
| LOGP(DMGCP, LOGL_NOTICE, |
| "Asked to reset endpoints: %d/%d\n", |
| reset_trunk->trunk_nr, reset_trunk->trunk_type); |
| reset_endpoints = 0; |
| |
| /* is checking in_addr.s_addr == INADDR_LOOPBACK making it more secure? */ |
| for (i = 1; i < reset_trunk->number_endpoints; ++i) |
| mgcp_release_endp(&reset_trunk->endpoints[i]); |
| } |
| |
| return 0; |
| } |
| |
| extern enum node_type bsc_vty_go_parent(struct vty *vty); |
| |
| static struct vty_app_info vty_info = { |
| .name = "OpenBSC MGCP", |
| .version = PACKAGE_VERSION, |
| .go_parent_cb = bsc_vty_go_parent, |
| .is_config_node = bsc_vty_is_config_node, |
| }; |
| |
| int main(int argc, char **argv) |
| { |
| struct gsm_network dummy_network; |
| struct sockaddr_in addr; |
| int on = 1, rc; |
| |
| tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent"); |
| |
| osmo_init_ignore_signals(); |
| osmo_init_logging(&log_info); |
| |
| cfg = mgcp_config_alloc(); |
| if (!cfg) |
| return -1; |
| |
| #ifdef BUILD_MGCP_TRANSCODING |
| cfg->setup_rtp_processing_cb = &mgcp_transcoding_setup; |
| cfg->rtp_processing_cb = &mgcp_transcoding_process_rtp; |
| cfg->get_net_downlink_format_cb = &mgcp_transcoding_net_downlink_format; |
| #endif |
| |
| vty_info.copyright = openbsc_copyright; |
| vty_init(&vty_info); |
| logging_vty_add_cmds(&log_info); |
| mgcp_vty_init(); |
| |
| handle_options(argc, argv); |
| |
| rc = mgcp_parse_config(config_file, cfg, MGCP_BSC); |
| if (rc < 0) |
| return rc; |
| |
| rc = telnet_init(tall_bsc_ctx, &dummy_network, OSMO_VTY_PORT_BSC_MGCP); |
| if (rc < 0) |
| return rc; |
| |
| /* set some callbacks */ |
| cfg->reset_cb = mgcp_rsip_cb; |
| |
| /* we need to bind a socket */ |
| if (rc == 0) { |
| cfg->gw_fd.bfd.when = BSC_FD_READ; |
| cfg->gw_fd.bfd.cb = read_call_agent; |
| cfg->gw_fd.bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); |
| if (cfg->gw_fd.bfd.fd < 0) { |
| perror("Gateway failed to listen"); |
| return -1; |
| } |
| |
| setsockopt(cfg->gw_fd.bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
| |
| memset(&addr, 0, sizeof(addr)); |
| addr.sin_family = AF_INET; |
| addr.sin_port = htons(cfg->source_port); |
| inet_aton(cfg->source_addr, &addr.sin_addr); |
| |
| if (bind(cfg->gw_fd.bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| perror("Gateway failed to bind"); |
| return -1; |
| } |
| |
| cfg->gw_fd.bfd.data = msgb_alloc(4096, "mgcp-msg"); |
| if (!cfg->gw_fd.bfd.data) { |
| fprintf(stderr, "Gateway memory error.\n"); |
| return -1; |
| } |
| |
| if (cfg->call_agent_addr) { |
| addr.sin_port = htons(2727); |
| inet_aton(cfg->call_agent_addr, &addr.sin_addr); |
| if (connect(cfg->gw_fd.bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| LOGP(DMGCP, LOGL_ERROR, "Failed to connect to: '%s'. errno: %d\n", |
| cfg->call_agent_addr, errno); |
| close(cfg->gw_fd.bfd.fd); |
| cfg->gw_fd.bfd.fd = -1; |
| return -1; |
| } |
| } |
| |
| if (osmo_fd_register(&cfg->gw_fd.bfd) != 0) { |
| LOGP(DMGCP, LOGL_FATAL, "Failed to register the fd\n"); |
| return -1; |
| } |
| |
| LOGP(DMGCP, LOGL_NOTICE, "Configured for MGCP.\n"); |
| } |
| |
| /* initialisation */ |
| srand(time(NULL)); |
| |
| if (daemonize) { |
| rc = osmo_daemonize(); |
| if (rc < 0) { |
| perror("Error during daemonize"); |
| exit(1); |
| } |
| } |
| |
| /* main loop */ |
| while (1) { |
| osmo_select_main(0); |
| } |
| |
| |
| return 0; |
| } |