Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 5 | * (C) 2009-2010 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2010 by On-Waves |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [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 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 33 | #include <openbsc/debug.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 34 | #include <osmocore/msgb.h> |
| 35 | #include <osmocore/talloc.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 36 | #include <openbsc/gsm_data.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 37 | #include <osmocore/select.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 38 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 39 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 40 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 41 | /** |
| 42 | * Macro for tokenizing MGCP messages and SDP in one go. |
| 43 | * |
| 44 | */ |
| 45 | #define MSG_TOKENIZE_START \ |
| 46 | line_start = 0; \ |
| 47 | for (i = 0; i < msgb_l3len(msg); ++i) { \ |
| 48 | /* we have a line end */ \ |
| 49 | if (msg->l3h[i] == '\n') { \ |
| 50 | /* skip the first line */ \ |
| 51 | if (line_start == 0) { \ |
| 52 | line_start = i + 1; \ |
| 53 | continue; \ |
| 54 | } \ |
| 55 | \ |
| 56 | /* check if we have a proper param */ \ |
| 57 | if (i - line_start == 1 && msg->l3h[line_start] == '\r') { \ |
| 58 | } else if (i - line_start > 2 \ |
| 59 | && islower(msg->l3h[line_start]) \ |
| 60 | && msg->l3h[line_start + 1] == '=') { \ |
| 61 | } else if (i - line_start < 3 \ |
| 62 | || msg->l3h[line_start + 1] != ':' \ |
| 63 | || msg->l3h[line_start + 2] != ' ') \ |
| 64 | goto error; \ |
| 65 | \ |
| 66 | msg->l3h[i] = '\0'; \ |
| 67 | if (msg->l3h[i-1] == '\r') \ |
| 68 | msg->l3h[i-1] = '\0'; |
| 69 | |
| 70 | #define MSG_TOKENIZE_END \ |
| 71 | line_start = i + 1; \ |
| 72 | } \ |
| 73 | } |
| 74 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 75 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 76 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 77 | struct mgcp_request { |
| 78 | char *name; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 79 | struct msgb *(*handle_request) (struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 80 | char *debug_name; |
| 81 | }; |
| 82 | |
| 83 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 84 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 85 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 86 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg); |
| 87 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg); |
| 88 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg); |
| 89 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 90 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 91 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 92 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 93 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 94 | |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 95 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 96 | { |
| 97 | int i; |
| 98 | |
| 99 | /* use the call id */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 100 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 101 | |
| 102 | /* handle wrap around */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 103 | if (cfg->last_call_id == CI_UNUSED) |
| 104 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 105 | |
| 106 | /* callstack can only be of size number_of_endpoints */ |
| 107 | /* verify that the call id is free, e.g. in case of overrun */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 108 | for (i = 1; i < cfg->number_endpoints; ++i) |
| 109 | if (cfg->endpoints[i].ci == cfg->last_call_id) |
| 110 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 111 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 112 | return cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 113 | } |
| 114 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 115 | /* |
| 116 | * array of function pointers for handling various |
| 117 | * messages. In the future this might be binary sorted |
| 118 | * for performance reasons. |
| 119 | */ |
| 120 | static const struct mgcp_request mgcp_requests [] = { |
| 121 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 122 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 123 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 124 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 125 | |
| 126 | /* SPEC extension */ |
| 127 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 128 | }; |
| 129 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 130 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 131 | { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 132 | struct msgb *msg; |
| 133 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 134 | if (!msg) |
| 135 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 136 | |
| 137 | return msg; |
| 138 | } |
| 139 | |
Holger Hans Peter Freyther | 6414a0c | 2010-02-21 10:50:46 +0100 | [diff] [blame] | 140 | struct msgb *mgcp_create_response_with_data(int code, const char *msg, const char *trans, |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 141 | const char *data) |
| 142 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 143 | int len; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 144 | struct msgb *res; |
| 145 | |
| 146 | res = mgcp_msgb_alloc(); |
| 147 | if (!res) |
| 148 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 149 | |
| 150 | if (data) { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 151 | len = snprintf((char *) res->data, 2048, "%d %s\n%s", code, trans, data); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 152 | } else { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 153 | len = snprintf((char *) res->data, 2048, "%d %s\n", code, trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 154 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 155 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 156 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | 63f2db2 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 157 | LOGP(DMGCP, LOGL_DEBUG, "Sending response: code: %d for '%s'\n", code, res->l2h); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 158 | return res; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 159 | } |
| 160 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 161 | static struct msgb *create_response(int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 162 | { |
Holger Hans Peter Freyther | 6414a0c | 2010-02-21 10:50:46 +0100 | [diff] [blame] | 163 | return mgcp_create_response_with_data(code, msg, trans, NULL); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 164 | } |
| 165 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 166 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 167 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 168 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 169 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 170 | char sdp_record[4096]; |
| 171 | |
| 172 | if (!addr) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 173 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 174 | |
| 175 | snprintf(sdp_record, sizeof(sdp_record) - 1, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 176 | "I: %u\n\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 177 | "v=0\r\n" |
| 178 | "c=IN IP4 %s\r\n" |
| 179 | "m=audio %d RTP/AVP %d\r\n" |
| 180 | "a=rtpmap:%d %s\r\n", |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 181 | endp->ci, addr, endp->net_end.local_port, |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 182 | endp->bts_end.payload_type, endp->bts_end.payload_type, |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 183 | endp->cfg->audio_name); |
Holger Hans Peter Freyther | 6414a0c | 2010-02-21 10:50:46 +0100 | [diff] [blame] | 184 | return mgcp_create_response_with_data(200, msg, trans_id, sdp_record); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 185 | } |
| 186 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 187 | /* |
| 188 | * handle incoming messages: |
| 189 | * - this can be a command (four letters, space, transaction id) |
| 190 | * - or a response (three numbers, space, transaction id) |
| 191 | */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 192 | struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 193 | { |
| 194 | int code; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 195 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 196 | |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 197 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 198 | LOGP(DMGCP, LOGL_ERROR, "mgs too short: %d\n", msg->len); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 199 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 200 | } |
| 201 | |
| 202 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 203 | if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) { |
Holger Hans Peter Freyther | 63f2db2 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 204 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 205 | } else { |
| 206 | int i, handled = 0; |
| 207 | msg->l3h = &msg->l2h[4]; |
| 208 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 209 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 210 | handled = 1; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 211 | resp = mgcp_requests[i].handle_request(cfg, msg); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 212 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 213 | } |
| 214 | if (!handled) { |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 215 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 216 | } |
| 217 | } |
| 218 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 219 | return resp; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | /* string tokenizer for the poor */ |
| 223 | static int find_msg_pointers(struct msgb *msg, struct mgcp_msg_ptr *ptrs, int ptrs_length) |
| 224 | { |
| 225 | int i, found = 0; |
| 226 | |
| 227 | int whitespace = 1; |
| 228 | for (i = 0; i < msgb_l3len(msg) && ptrs_length > 0; ++i) { |
| 229 | /* if we have a space we found an end */ |
| 230 | if (msg->l3h[i] == ' ' || msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 231 | if (!whitespace) { |
| 232 | ++found; |
| 233 | whitespace = 1; |
| 234 | ptrs->length = i - ptrs->start - 1; |
| 235 | ++ptrs; |
| 236 | --ptrs_length; |
| 237 | } else { |
| 238 | /* skip any number of whitespace */ |
| 239 | } |
| 240 | |
| 241 | /* line end... stop */ |
| 242 | if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') |
| 243 | break; |
| 244 | } else if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 245 | /* line end, be done */ |
| 246 | break; |
| 247 | } else if (whitespace) { |
| 248 | whitespace = 0; |
| 249 | ptrs->start = i; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | if (ptrs_length == 0) |
| 254 | return -1; |
| 255 | return found; |
| 256 | } |
| 257 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 258 | static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg, const char *mgcp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 259 | { |
| 260 | char *endptr = NULL; |
| 261 | unsigned int gw = INT_MAX; |
| 262 | |
| 263 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 264 | if (gw == 0 || gw >= cfg->number_endpoints || strcmp(endptr, "@mgw") != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 265 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 266 | return NULL; |
| 267 | } |
| 268 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 269 | return &cfg->endpoints[gw]; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 270 | } |
| 271 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 272 | int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg, |
| 273 | struct mgcp_msg_ptr *ptr, int size, |
| 274 | const char **transaction_id, struct mgcp_endpoint **endp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 275 | { |
| 276 | int found; |
| 277 | |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 278 | *transaction_id = "000000"; |
| 279 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 280 | if (size < 3) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 281 | LOGP(DMGCP, LOGL_ERROR, "Not enough space in ptr\n"); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | found = find_msg_pointers(msg, ptr, size); |
| 286 | |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 287 | if (found <= 3) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 288 | LOGP(DMGCP, LOGL_ERROR, "Gateway: Not enough params. Found: %d\n", found); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * replace the space with \0. the main method gurantess that |
| 294 | * we still have + 1 for null termination |
| 295 | */ |
| 296 | msg->l3h[ptr[3].start + ptr[3].length + 1] = '\0'; |
| 297 | msg->l3h[ptr[2].start + ptr[2].length + 1] = '\0'; |
| 298 | msg->l3h[ptr[1].start + ptr[1].length + 1] = '\0'; |
| 299 | msg->l3h[ptr[0].start + ptr[0].length + 1] = '\0'; |
| 300 | |
| 301 | if (strncmp("1.0", (const char *)&msg->l3h[ptr[3].start], 3) != 0 |
| 302 | || strncmp("MGCP", (const char *)&msg->l3h[ptr[2].start], 4) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 303 | LOGP(DMGCP, LOGL_ERROR, "Wrong MGCP version. Not handling: '%s' '%s'\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 304 | (const char *)&msg->l3h[ptr[3].start], |
| 305 | (const char *)&msg->l3h[ptr[2].start]); |
| 306 | return -1; |
| 307 | } |
| 308 | |
| 309 | *transaction_id = (const char *)&msg->l3h[ptr[0].start]; |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 310 | if (endp) { |
| 311 | *endp = find_endpoint(cfg, (const char *)&msg->l3h[ptr[1].start]); |
| 312 | return *endp == NULL; |
| 313 | } |
| 314 | return 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 318 | const char *callid) |
| 319 | { |
| 320 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 321 | LOGP(DMGCP, LOGL_ERROR, "CallIDs does not match on 0x%x. '%s' != '%s'\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 322 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 323 | return -1; |
| 324 | } |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 330 | const char *_ci) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 331 | { |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 332 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 333 | |
| 334 | if (ci != endp->ci) { |
| 335 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 336 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 337 | return -1; |
| 338 | } |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 343 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 344 | { |
| 345 | struct mgcp_msg_ptr data_ptrs[6]; |
| 346 | int found, response; |
| 347 | const char *trans_id; |
| 348 | struct mgcp_endpoint *endp; |
| 349 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 350 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 351 | if (found != 0) |
| 352 | response = 500; |
| 353 | else |
| 354 | response = 200; |
| 355 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 356 | return create_response(response, "AUEP", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 357 | } |
| 358 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 359 | static int parse_conn_mode(const char *msg, int *conn_mode) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 360 | { |
| 361 | int ret = 0; |
| 362 | if (strcmp(msg, "recvonly") == 0) |
| 363 | *conn_mode = MGCP_CONN_RECV_ONLY; |
| 364 | else if (strcmp(msg, "sendrecv") == 0) |
| 365 | *conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | e02860a | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 366 | else if (strcmp(msg, "sendonly") == 0) |
| 367 | *conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 98a3877 | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 368 | else if (strcmp(msg, "loopback") == 0) |
| 369 | *conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 370 | else { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 371 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 372 | ret = -1; |
| 373 | } |
| 374 | |
| 375 | return ret; |
| 376 | } |
| 377 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 378 | static int allocate_port(struct mgcp_endpoint *endp, struct mgcp_rtp_end *end, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 379 | struct mgcp_port_range *range, |
| 380 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 381 | { |
| 382 | int i; |
| 383 | |
| 384 | if (range->mode == PORT_ALLOC_STATIC) { |
| 385 | end->local_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), range->base_port); |
| 386 | end->local_alloc = PORT_ALLOC_STATIC; |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | /* attempt to find a port */ |
| 391 | for (i = 0; i < 200; ++i) { |
| 392 | int rc; |
| 393 | |
| 394 | if (range->last_port >= range->range_end) |
| 395 | range->last_port = range->range_start; |
| 396 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 397 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 398 | |
| 399 | range->last_port += 2; |
| 400 | if (rc == 0) { |
| 401 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | } |
| 406 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 407 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 408 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 413 | { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 414 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 415 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 416 | return -1; |
| 417 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 418 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 419 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 420 | mgcp_rtp_end_reset(&endp->net_end); |
| 421 | return -1; |
| 422 | } |
| 423 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 424 | if (endp->cfg->transcoder_ip && |
| 425 | allocate_port(endp, &endp->transcoder_end, &endp->cfg->transcoder_ports, |
| 426 | mgcp_bind_transcoder_rtp_port) != 0) { |
| 427 | mgcp_rtp_end_reset(&endp->net_end); |
| 428 | mgcp_rtp_end_reset(&endp->bts_end); |
| 429 | return -1; |
| 430 | } |
| 431 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 432 | return 0; |
| 433 | } |
| 434 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 435 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 436 | { |
| 437 | struct mgcp_msg_ptr data_ptrs[6]; |
| 438 | int found, i, line_start; |
| 439 | const char *trans_id; |
| 440 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 441 | int error_code = 400; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 442 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 443 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 444 | if (found != 0) |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 445 | return create_response(510, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 446 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 447 | if (endp->allocated) { |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 448 | if (cfg->force_realloc) { |
| 449 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 450 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 32d4e50 | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 451 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 869e38e | 2010-08-06 17:54:27 +0800 | [diff] [blame] | 452 | if (cfg->realloc_cb) |
| 453 | cfg->realloc_cb(cfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 454 | } else { |
| 455 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 456 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 457 | return create_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 458 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | /* parse CallID C: and LocalParameters L: */ |
| 462 | MSG_TOKENIZE_START |
| 463 | switch (msg->l3h[line_start]) { |
| 464 | case 'L': |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 465 | endp->local_options = talloc_strdup(cfg->endpoints, |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 466 | (const char *)&msg->l3h[line_start + 3]); |
| 467 | break; |
| 468 | case 'C': |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 469 | endp->callid = talloc_strdup(cfg->endpoints, |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 470 | (const char *)&msg->l3h[line_start + 3]); |
| 471 | break; |
| 472 | case 'M': |
| 473 | if (parse_conn_mode((const char *)&msg->l3h[line_start + 3], |
| 474 | &endp->conn_mode) != 0) { |
| 475 | error_code = 517; |
| 476 | goto error2; |
| 477 | } |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 478 | |
| 479 | endp->orig_mode = endp->conn_mode; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 480 | break; |
| 481 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 482 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 483 | msg->l3h[line_start], msg->l3h[line_start], |
| 484 | ENDPOINT_NUMBER(endp)); |
| 485 | break; |
| 486 | } |
| 487 | MSG_TOKENIZE_END |
| 488 | |
| 489 | /* initialize */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 490 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 491 | |
| 492 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 493 | memset(&endp->net_end.addr, 0, sizeof(endp->net_end.addr)); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 494 | |
| 495 | /* bind to the port now */ |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 496 | if (allocate_ports(endp) != 0) |
| 497 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 498 | |
| 499 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 500 | endp->ci = generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 501 | if (endp->ci == CI_UNUSED) |
| 502 | goto error2; |
| 503 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 504 | endp->allocated = 1; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 505 | endp->bts_end.payload_type = cfg->audio_payload; |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 506 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 507 | /* policy CB */ |
| 508 | if (cfg->policy_cb) { |
| 509 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) { |
| 510 | case MGCP_POLICY_REJECT: |
| 511 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 512 | ENDPOINT_NUMBER(endp)); |
| 513 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 514 | return create_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 515 | break; |
| 516 | case MGCP_POLICY_DEFER: |
| 517 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 518 | create_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 519 | return NULL; |
| 520 | break; |
| 521 | case MGCP_POLICY_CONT: |
| 522 | /* just continue */ |
| 523 | break; |
| 524 | } |
| 525 | } |
| 526 | |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 527 | LOGP(DMGCP, LOGL_DEBUG, "Creating endpoint on: 0x%x CI: %u port: %u/%u\n", |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 528 | ENDPOINT_NUMBER(endp), endp->ci, |
| 529 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 530 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 531 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 77f7afe | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 532 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 533 | create_transcoder(endp); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 534 | return create_response_with_sdp(endp, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 535 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 536 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 537 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 538 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 539 | return create_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 540 | |
| 541 | error2: |
Holger Hans Peter Freyther | 414bf40 | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 542 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 543 | LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 544 | return create_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 545 | } |
| 546 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 547 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 548 | { |
| 549 | struct mgcp_msg_ptr data_ptrs[6]; |
| 550 | int found, i, line_start; |
| 551 | const char *trans_id; |
| 552 | struct mgcp_endpoint *endp; |
| 553 | int error_code = 500; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 554 | int silent = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 555 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 556 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 557 | if (found != 0) |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 558 | return create_response(510, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 559 | |
| 560 | if (endp->ci == CI_UNUSED) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 561 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 562 | return create_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | MSG_TOKENIZE_START |
| 566 | switch (msg->l3h[line_start]) { |
| 567 | case 'C': { |
| 568 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 569 | goto error3; |
| 570 | break; |
| 571 | } |
| 572 | case 'I': { |
| 573 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 574 | goto error3; |
| 575 | break; |
| 576 | } |
| 577 | case 'L': |
| 578 | /* skip */ |
| 579 | break; |
| 580 | case 'M': |
| 581 | if (parse_conn_mode((const char *)&msg->l3h[line_start + 3], |
| 582 | &endp->conn_mode) != 0) { |
| 583 | error_code = 517; |
| 584 | goto error3; |
| 585 | } |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 586 | endp->orig_mode = endp->conn_mode; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 587 | break; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 588 | case 'Z': |
| 589 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 590 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 591 | case '\0': |
| 592 | /* SDP file begins */ |
| 593 | break; |
| 594 | case 'a': |
| 595 | case 'o': |
| 596 | case 's': |
| 597 | case 't': |
| 598 | case 'v': |
| 599 | /* skip these SDP attributes */ |
| 600 | break; |
| 601 | case 'm': { |
| 602 | int port; |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 603 | int payload; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 604 | const char *param = (const char *)&msg->l3h[line_start]; |
| 605 | |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 606 | if (sscanf(param, "m=audio %d RTP/AVP %d", &port, &payload) == 2) { |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 607 | endp->net_end.rtp_port = htons(port); |
| 608 | endp->net_end.rtcp_port = htons(port + 1); |
| 609 | endp->net_end.payload_type = payload; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 610 | } |
| 611 | break; |
| 612 | } |
| 613 | case 'c': { |
| 614 | char ipv4[16]; |
| 615 | const char *param = (const char *)&msg->l3h[line_start]; |
| 616 | |
| 617 | if (sscanf(param, "c=IN IP4 %15s", ipv4) == 1) { |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 618 | inet_aton(ipv4, &endp->net_end.addr); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 619 | } |
| 620 | break; |
| 621 | } |
| 622 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 623 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 624 | msg->l3h[line_start], msg->l3h[line_start], |
| 625 | ENDPOINT_NUMBER(endp)); |
| 626 | break; |
| 627 | } |
| 628 | MSG_TOKENIZE_END |
| 629 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 630 | /* policy CB */ |
| 631 | if (cfg->policy_cb) { |
| 632 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) { |
| 633 | case MGCP_POLICY_REJECT: |
| 634 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 635 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 636 | if (silent) |
| 637 | goto out_silent; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 638 | return create_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 639 | break; |
| 640 | case MGCP_POLICY_DEFER: |
| 641 | /* stop processing */ |
| 642 | return NULL; |
| 643 | break; |
| 644 | case MGCP_POLICY_CONT: |
| 645 | /* just continue */ |
| 646 | break; |
| 647 | } |
| 648 | } |
| 649 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 650 | /* modify */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 651 | LOGP(DMGCP, LOGL_DEBUG, "Modified endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 652 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 653 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 654 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 655 | if (silent) |
| 656 | goto out_silent; |
| 657 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 658 | return create_response_with_sdp(endp, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 659 | |
| 660 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 661 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 662 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 663 | ENDPOINT_NUMBER(endp), line_start, i, msg->l3h[line_start]); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 664 | return create_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 665 | |
| 666 | error3: |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 667 | return create_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 668 | |
| 669 | |
| 670 | out_silent: |
| 671 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 672 | } |
| 673 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 674 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 675 | { |
| 676 | struct mgcp_msg_ptr data_ptrs[6]; |
| 677 | int found, i, line_start; |
| 678 | const char *trans_id; |
| 679 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 680 | int error_code = 400; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 681 | int silent = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 682 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 683 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 684 | if (found != 0) |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 685 | return create_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 686 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 687 | if (!endp->allocated) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 688 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 689 | return create_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | MSG_TOKENIZE_START |
| 693 | switch (msg->l3h[line_start]) { |
| 694 | case 'C': { |
| 695 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 696 | goto error3; |
| 697 | break; |
| 698 | } |
| 699 | case 'I': { |
| 700 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 701 | goto error3; |
| 702 | break; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 703 | case 'Z': |
| 704 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 705 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 706 | } |
| 707 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 708 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 709 | msg->l3h[line_start], msg->l3h[line_start], |
| 710 | ENDPOINT_NUMBER(endp)); |
| 711 | break; |
| 712 | } |
| 713 | MSG_TOKENIZE_END |
| 714 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 715 | /* policy CB */ |
| 716 | if (cfg->policy_cb) { |
| 717 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) { |
| 718 | case MGCP_POLICY_REJECT: |
| 719 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 720 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 721 | if (silent) |
| 722 | goto out_silent; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 723 | return create_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 724 | break; |
| 725 | case MGCP_POLICY_DEFER: |
| 726 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 727 | delete_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 728 | return NULL; |
| 729 | break; |
| 730 | case MGCP_POLICY_CONT: |
| 731 | /* just continue */ |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 736 | /* free the connection */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 737 | LOGP(DMGCP, LOGL_DEBUG, "Deleted endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 738 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 739 | |
| 740 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 741 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 742 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 743 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 744 | |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 745 | if (silent) |
| 746 | goto out_silent; |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 747 | return create_response(250, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 748 | |
| 749 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 750 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 751 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 752 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 753 | return create_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 754 | |
| 755 | error3: |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 756 | return create_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 757 | |
| 758 | out_silent: |
| 759 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 760 | } |
| 761 | |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 762 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg) |
| 763 | { |
| 764 | if (cfg->reset_cb) |
| 765 | cfg->reset_cb(cfg); |
| 766 | return NULL; |
| 767 | } |
| 768 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 769 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 770 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 771 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 772 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 773 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 774 | if (!cfg) { |
| 775 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 776 | return NULL; |
| 777 | } |
| 778 | |
| 779 | cfg->source_port = 2427; |
| 780 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | 0e940e6 | 2010-09-19 04:14:38 +0800 | [diff] [blame] | 781 | cfg->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 782 | cfg->audio_payload = 126; |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 783 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 15e7389 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 784 | |
| 785 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 786 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 787 | |
| 788 | return cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 789 | } |
| 790 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 791 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 792 | { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 793 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) |
| 794 | mgcp_free_rtp_port(end); |
| 795 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 796 | end->packets = 0; |
| 797 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 798 | end->rtp_port = end->rtcp_port = end->local_port = 0; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 799 | end->payload_type = -1; |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 800 | end->local_alloc = -1; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 801 | } |
| 802 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 803 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 804 | { |
| 805 | mgcp_rtp_end_reset(end); |
| 806 | end->rtp.fd = -1; |
| 807 | end->rtcp.fd = -1; |
| 808 | } |
| 809 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 810 | int mgcp_endpoints_allocate(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 811 | { |
| 812 | int i; |
| 813 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 814 | /* Initialize all endpoints */ |
| 815 | cfg->endpoints = _talloc_zero_array(cfg, |
| 816 | sizeof(struct mgcp_endpoint), |
| 817 | cfg->number_endpoints, "endpoints"); |
| 818 | if (!cfg->endpoints) |
| 819 | return -1; |
| 820 | |
| 821 | for (i = 0; i < cfg->number_endpoints; ++i) { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 822 | cfg->endpoints[i].ci = CI_UNUSED; |
| 823 | cfg->endpoints[i].cfg = cfg; |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 824 | mgcp_rtp_end_init(&cfg->endpoints[i].net_end); |
| 825 | mgcp_rtp_end_init(&cfg->endpoints[i].bts_end); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 826 | mgcp_rtp_end_init(&cfg->endpoints[i].transcoder_end); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 827 | } |
| 828 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 829 | return 0; |
| 830 | } |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 831 | |
| 832 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 833 | { |
Holger Hans Peter Freyther | c77efdf | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 834 | LOGP(DMGCP, LOGL_DEBUG, "Deleting endpoint on: 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 89976e8 | 2010-08-03 15:01:43 +0000 | [diff] [blame] | 835 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 836 | endp->allocated = 0; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 837 | |
| 838 | if (endp->callid) { |
| 839 | talloc_free(endp->callid); |
| 840 | endp->callid = NULL; |
| 841 | } |
| 842 | |
| 843 | if (endp->local_options) { |
| 844 | talloc_free(endp->local_options); |
Holger Hans Peter Freyther | 88c6eea | 2010-03-01 18:52:04 +0100 | [diff] [blame] | 845 | endp->local_options = NULL; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 846 | } |
| 847 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 848 | mgcp_rtp_end_reset(&endp->bts_end); |
| 849 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 850 | mgcp_rtp_end_reset(&endp->transcoder_end); |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 851 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 852 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 853 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 854 | |
| 855 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 6357a8e | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 856 | endp->allow_patch = 0; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 857 | |
| 858 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 859 | } |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 860 | |
| 861 | /* For transcoding we need to manage an in and an output that are connected */ |
| 862 | static int back_channel(int endpoint) |
| 863 | { |
| 864 | return endpoint + 60; |
| 865 | } |
| 866 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 867 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 868 | { |
| 869 | struct sockaddr_in addr; |
| 870 | |
| 871 | memset(&addr, 0, sizeof(addr)); |
| 872 | addr.sin_family = AF_INET; |
| 873 | addr.sin_addr = cfg->transcoder_in; |
| 874 | addr.sin_port = htons(2427); |
| 875 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 876 | (struct sockaddr *) &addr, sizeof(addr)); |
| 877 | } |
| 878 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 879 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 880 | const char *msg, const char *mode) |
| 881 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 882 | char buf[2096]; |
| 883 | int len; |
| 884 | |
| 885 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 886 | len = snprintf(buf, sizeof(buf), |
| 887 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 888 | "C: 4256\r\n" |
| 889 | "M: %s\r\n" |
| 890 | "\r\n" |
| 891 | "c=IN IP4 %s\r\n" |
| 892 | "m=audio %d RTP/AVP %d\r\n" |
| 893 | "a=rtpmap:%d %s\r\n", |
| 894 | msg, endpoint, mode, endp->cfg->source_addr, |
| 895 | port, endp->cfg->audio_payload, |
| 896 | endp->cfg->audio_payload, endp->cfg->audio_name); |
| 897 | |
| 898 | if (len < 0) |
| 899 | return; |
| 900 | |
| 901 | buf[sizeof(buf) - 1] = '\0'; |
| 902 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 903 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 904 | } |
| 905 | |
| 906 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 907 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 908 | char buf[2096]; |
| 909 | int len; |
| 910 | |
| 911 | len = snprintf(buf, sizeof(buf), |
| 912 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 913 | "C: 4256\r\n" |
| 914 | , endpoint); |
| 915 | |
| 916 | if (len < 0) |
| 917 | return; |
| 918 | |
| 919 | buf[sizeof(buf) - 1] = '\0'; |
| 920 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 921 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 922 | } |
| 923 | |
| 924 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 925 | { |
| 926 | int port; |
| 927 | int in_endp = ENDPOINT_NUMBER(endp); |
| 928 | int out_endp = back_channel(in_endp); |
| 929 | |
| 930 | if (!endp->cfg->transcoder_ip) |
| 931 | return; |
| 932 | |
| 933 | send_msg(endp, in_endp, endp->bts_end.local_port, "CRCX", "recvonly"); |
| 934 | send_msg(endp, in_endp, endp->bts_end.local_port, "MDCX", "recvonly"); |
| 935 | send_msg(endp, out_endp, endp->transcoder_end.local_port, "CRCX", "sendrecv"); |
| 936 | send_msg(endp, out_endp, endp->transcoder_end.local_port, "MDCX", "sendrecv"); |
| 937 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 938 | port = rtp_calculate_port(out_endp, endp->cfg->transcoder_remote_base); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 939 | endp->transcoder_end.rtp_port = htons(port); |
| 940 | endp->transcoder_end.rtcp_port = htons(port + 1); |
| 941 | } |
| 942 | |
| 943 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 944 | { |
| 945 | int in_endp = ENDPOINT_NUMBER(endp); |
| 946 | int out_endp = back_channel(in_endp); |
| 947 | |
| 948 | if (!endp->cfg->transcoder_ip) |
| 949 | return; |
| 950 | |
| 951 | send_dlcx(endp, in_endp); |
| 952 | send_dlcx(endp, out_endp); |
| 953 | } |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 954 | |
| 955 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 956 | { |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 957 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | cf1c877 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 958 | return 0; |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 959 | |
| 960 | static const char mgcp_reset[] = { |
| 961 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 962 | }; |
| 963 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 964 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 965 | } |