Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 2 | /* The main method to drive it as a standalone process */ |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 3 | |
| 4 | /* |
| 5 | * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
Holger Hans Peter Freyther | 92026f1 | 2010-02-03 18:10:07 +0100 | [diff] [blame] | 6 | * (C) 2009 by On-Waves |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <ctype.h> |
| 26 | #include <stdio.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <string.h> |
| 29 | #include <time.h> |
| 30 | #include <limits.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include <sys/socket.h> |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 34 | |
| 35 | #include <openbsc/debug.h> |
| 36 | #include <openbsc/msgb.h> |
| 37 | #include <openbsc/talloc.h> |
| 38 | #include <openbsc/gsm_data.h> |
| 39 | #include <openbsc/select.h> |
| 40 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 338fa56 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 41 | #include <openbsc/telnet_interface.h> |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 42 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 43 | /* this is here for the vty... it will never be called */ |
| 44 | void subscr_put() { abort(); } |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 45 | |
| 46 | #define _GNU_SOURCE |
| 47 | #include <getopt.h> |
| 48 | |
| 49 | #warning "Make use of the rtp proxy code" |
| 50 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 51 | static struct bsc_fd bfd; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 52 | static int first_request = 1; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 53 | static struct mgcp_config *cfg; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 54 | |
| 55 | static char *config_file = "mgcp.cfg"; |
| 56 | |
| 57 | /* used by msgb and mgcp */ |
| 58 | void *tall_bsc_ctx = NULL; |
| 59 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 60 | static void print_help() |
| 61 | { |
| 62 | printf("Some useful help...\n"); |
| 63 | printf(" -h --help is printing this text.\n"); |
| 64 | printf(" -c --config-file filename The config file to use.\n"); |
| 65 | } |
| 66 | |
| 67 | static void handle_options(int argc, char** argv) |
| 68 | { |
| 69 | while (1) { |
| 70 | int option_index = 0, c; |
| 71 | static struct option long_options[] = { |
| 72 | {"help", 0, 0, 'h'}, |
| 73 | {"config-file", 1, 0, 'c'}, |
| 74 | {0, 0, 0, 0}, |
| 75 | }; |
| 76 | |
| 77 | c = getopt_long(argc, argv, "hc:", long_options, &option_index); |
| 78 | |
| 79 | if (c == -1) |
| 80 | break; |
| 81 | |
| 82 | switch(c) { |
| 83 | case 'h': |
| 84 | print_help(); |
| 85 | exit(0); |
| 86 | break; |
| 87 | case 'c': |
| 88 | config_file = talloc_strdup(tall_bsc_ctx, optarg); |
| 89 | break; |
| 90 | default: |
| 91 | /* ignore */ |
| 92 | break; |
| 93 | }; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | static int read_call_agent(struct bsc_fd *fd, unsigned int what) |
| 98 | { |
| 99 | struct sockaddr_in addr; |
| 100 | socklen_t slen = sizeof(addr); |
| 101 | struct msgb *msg; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 102 | struct msgb *resp; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 103 | |
| 104 | msg = (struct msgb *) fd->data; |
| 105 | |
| 106 | /* read one less so we can use it as a \0 */ |
| 107 | int rc = recvfrom(bfd.fd, msg->data, msg->data_len - 1, 0, |
| 108 | (struct sockaddr *) &addr, &slen); |
| 109 | if (rc < 0) { |
| 110 | perror("Gateway failed to read"); |
| 111 | return -1; |
| 112 | } else if (slen > sizeof(addr)) { |
| 113 | fprintf(stderr, "Gateway received message from outerspace: %d %d\n", |
| 114 | slen, sizeof(addr)); |
| 115 | return -1; |
| 116 | } |
| 117 | |
| 118 | if (first_request) { |
| 119 | first_request = 0; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 120 | resp = mgcp_create_rsip(); |
| 121 | |
| 122 | if (resp) { |
| 123 | sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, |
| 124 | (struct sockaddr *) &addr, sizeof(addr)); |
| 125 | msgb_free(resp); |
| 126 | } |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | /* handle message now */ |
| 131 | msg->l2h = msgb_put(msg, rc); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 132 | resp = mgcp_handle_message(cfg, msg); |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 133 | msgb_reset(msg); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 134 | |
| 135 | if (resp) { |
| 136 | sendto(bfd.fd, resp->l2h, msgb_l2len(resp), 0, (struct sockaddr *) &addr, sizeof(addr)); |
| 137 | msgb_free(resp); |
| 138 | } |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 139 | return 0; |
| 140 | } |
| 141 | |
Holger Hans Peter Freyther | bd5130d | 2010-01-13 23:36:53 +0100 | [diff] [blame] | 142 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 143 | int main(int argc, char** argv) |
| 144 | { |
Holger Hans Peter Freyther | 338fa56 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 145 | struct gsm_network dummy_network; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 146 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 147 | int on = 1, rc; |
Holger Hans Peter Freyther | b61e3b2 | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 148 | struct debug_target *stderr_target; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 149 | |
| 150 | tall_bsc_ctx = talloc_named_const(NULL, 1, "mgcp-callagent"); |
Holger Hans Peter Freyther | b61e3b2 | 2009-12-22 22:32:51 +0100 | [diff] [blame] | 151 | |
| 152 | debug_init(); |
| 153 | stderr_target = debug_target_create_stderr(); |
| 154 | debug_add_target(stderr_target); |
| 155 | debug_set_all_filter(stderr_target, 1); |
| 156 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 157 | cfg = mgcp_config_alloc(); |
| 158 | if (!cfg) |
| 159 | return -1; |
| 160 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 161 | handle_options(argc, argv); |
| 162 | |
Holger Hans Peter Freyther | 338fa56 | 2009-11-19 15:03:39 +0100 | [diff] [blame] | 163 | telnet_init(&dummy_network, 4243); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 164 | rc = mgcp_parse_config(config_file, cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 165 | if (rc < 0) |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 166 | return rc; |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 167 | |
| 168 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 169 | /* we need to bind a socket */ |
| 170 | if (rc == 0) { |
Holger Hans Peter Freyther | 14083be | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 171 | bfd.when = BSC_FD_READ; |
| 172 | bfd.cb = read_call_agent; |
| 173 | bfd.fd = socket(AF_INET, SOCK_DGRAM, 0); |
| 174 | if (bfd.fd < 0) { |
| 175 | perror("Gateway failed to listen"); |
| 176 | return -1; |
| 177 | } |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 178 | |
Holger Hans Peter Freyther | 14083be | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 179 | setsockopt(bfd.fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)); |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 180 | |
Holger Hans Peter Freyther | 14083be | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 181 | memset(&addr, 0, sizeof(addr)); |
| 182 | addr.sin_family = AF_INET; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 183 | addr.sin_port = htons(cfg->source_port); |
| 184 | inet_aton(cfg->source_addr, &addr.sin_addr); |
Holger Hans Peter Freyther | 14083be | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 185 | |
| 186 | if (bind(bfd.fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) { |
| 187 | perror("Gateway failed to bind"); |
| 188 | return -1; |
| 189 | } |
| 190 | |
| 191 | bfd.data = msgb_alloc(4096, "mgcp-msg"); |
| 192 | if (!bfd.data) { |
| 193 | fprintf(stderr, "Gateway memory error.\n"); |
| 194 | return -1; |
| 195 | } |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 196 | |
| 197 | |
Holger Hans Peter Freyther | 14083be | 2010-01-05 12:21:36 +0100 | [diff] [blame] | 198 | if (bsc_register_fd(&bfd) != 0) { |
| 199 | DEBUGP(DMGCP, "Failed to register the fd\n"); |
| 200 | return -1; |
| 201 | } |
Holger Hans Peter Freyther | f986cfc | 2010-01-05 12:25:25 +0100 | [diff] [blame] | 202 | |
| 203 | DEBUGP(DMGCP, "Configured for MGCP.\n"); |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | /* initialisation */ |
| 207 | srand(time(NULL)); |
| 208 | |
Holger Hans Peter Freyther | f67945f | 2009-10-09 07:08:11 +0200 | [diff] [blame] | 209 | /* main loop */ |
| 210 | while (1) { |
| 211 | bsc_select_main(0); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | return 0; |
| 216 | } |