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 | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 5 | * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2012 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 |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 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 |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <time.h> |
| 29 | #include <limits.h> |
| 30 | #include <unistd.h> |
| 31 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/talloc.h> |
| 34 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 16b7f5c | 2011-02-28 22:06:47 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 36 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 38 | |
Jacob Erlbeck | a01bd60 | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 39 | #define for_each_non_empty_line(line, save) \ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 40 | for (line = strtok_r(NULL, "\r\n", &save); line;\ |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 41 | line = strtok_r(NULL, "\r\n", &save)) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 42 | |
Jacob Erlbeck | 2bee7f9 | 2013-11-29 13:43:44 +0100 | [diff] [blame] | 43 | #define for_each_line(line, save) \ |
| 44 | for (line = strline_r(NULL, &save); line;\ |
| 45 | line = strline_r(NULL, &save)) |
| 46 | |
| 47 | char *strline_r(char *str, char **saveptr) |
| 48 | { |
| 49 | char *result; |
| 50 | |
| 51 | if (str) |
| 52 | *saveptr = str; |
| 53 | |
| 54 | result = *saveptr; |
| 55 | |
| 56 | if (*saveptr != NULL) { |
| 57 | *saveptr = strpbrk(*saveptr, "\r\n"); |
| 58 | |
| 59 | if (*saveptr != NULL) { |
| 60 | char *eos = *saveptr; |
| 61 | |
| 62 | if ((*saveptr)[0] == '\r' && (*saveptr)[1] == '\n') |
| 63 | (*saveptr)++; |
| 64 | (*saveptr)++; |
| 65 | if ((*saveptr)[0] == '\0') |
| 66 | *saveptr = NULL; |
| 67 | |
| 68 | *eos = '\0'; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return result; |
| 73 | } |
| 74 | |
Jacob Erlbeck | 72c3090 | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 75 | /* Assume audio frame length of 20ms */ |
| 76 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20 |
| 77 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000 |
Jacob Erlbeck | f6ec0e9 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 78 | #define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20 |
Jacob Erlbeck | 72c3090 | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 79 | #define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000 |
| 80 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 81 | 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] | 82 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 83 | struct mgcp_parse_data { |
| 84 | struct mgcp_config *cfg; |
| 85 | struct mgcp_endpoint *endp; |
| 86 | char *trans; |
| 87 | char *save; |
| 88 | int found; |
| 89 | }; |
| 90 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 91 | struct mgcp_request { |
| 92 | char *name; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 93 | struct msgb *(*handle_request) (struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 94 | char *debug_name; |
| 95 | }; |
| 96 | |
| 97 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 98 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 99 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 100 | static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *data); |
| 101 | static struct msgb *handle_create_con(struct mgcp_parse_data *data); |
| 102 | static struct msgb *handle_delete_con(struct mgcp_parse_data *data); |
| 103 | static struct msgb *handle_modify_con(struct mgcp_parse_data *data); |
| 104 | static struct msgb *handle_rsip(struct mgcp_parse_data *data); |
| 105 | static struct msgb *handle_noti_req(struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 106 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 107 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 108 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 109 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 110 | static int mgcp_analyze_header(struct mgcp_parse_data *parse, char *data); |
| 111 | |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 112 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 113 | { |
| 114 | int i; |
| 115 | |
| 116 | /* use the call id */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 117 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 118 | |
| 119 | /* handle wrap around */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 120 | if (cfg->last_call_id == CI_UNUSED) |
| 121 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 122 | |
| 123 | /* callstack can only be of size number_of_endpoints */ |
| 124 | /* verify that the call id is free, e.g. in case of overrun */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 125 | for (i = 1; i < cfg->trunk.number_endpoints; ++i) |
| 126 | if (cfg->trunk.endpoints[i].ci == cfg->last_call_id) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 127 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 128 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 129 | return cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 130 | } |
| 131 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 132 | /* |
| 133 | * array of function pointers for handling various |
| 134 | * messages. In the future this might be binary sorted |
| 135 | * for performance reasons. |
| 136 | */ |
| 137 | static const struct mgcp_request mgcp_requests [] = { |
| 138 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 139 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 140 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 141 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 142 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 143 | |
| 144 | /* SPEC extension */ |
| 145 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 146 | }; |
| 147 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 148 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 149 | { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 150 | struct msgb *msg; |
| 151 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 152 | if (!msg) |
| 153 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 154 | |
| 155 | return msg; |
| 156 | } |
| 157 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 158 | static struct msgb *do_retransmission(const struct mgcp_endpoint *endp) |
| 159 | { |
| 160 | struct msgb *msg = mgcp_msgb_alloc(); |
| 161 | if (!msg) |
| 162 | return NULL; |
| 163 | |
| 164 | msg->l2h = msgb_put(msg, strlen(endp->last_response)); |
| 165 | memcpy(msg->l2h, endp->last_response, msgb_l2len(msg)); |
| 166 | return msg; |
| 167 | } |
| 168 | |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 169 | static struct msgb *create_resp(struct mgcp_endpoint *endp, int code, |
| 170 | const char *txt, const char *msg, |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 171 | const char *trans, const char *param, |
| 172 | const char *sdp) |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 173 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 174 | int len; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 175 | struct msgb *res; |
| 176 | |
| 177 | res = mgcp_msgb_alloc(); |
| 178 | if (!res) |
| 179 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 180 | |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 181 | len = snprintf((char *) res->data, 2048, "%d %s%s%s\r\n%s", |
| 182 | code, trans, txt, param ? param : "", sdp ? sdp : ""); |
| 183 | if (len < 0) { |
| 184 | LOGP(DMGCP, LOGL_ERROR, "Failed to sprintf MGCP response.\n"); |
| 185 | msgb_free(res); |
| 186 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 187 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 188 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 189 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 190 | LOGP(DMGCP, LOGL_DEBUG, "Generated response: code: %d for '%s'\n", code, res->l2h); |
| 191 | |
| 192 | /* |
| 193 | * Remember the last transmission per endpoint. |
| 194 | */ |
| 195 | if (endp) { |
| 196 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 197 | talloc_free(endp->last_response); |
| 198 | talloc_free(endp->last_trans); |
| 199 | endp->last_trans = talloc_strdup(tcfg->endpoints, trans); |
| 200 | endp->last_response = talloc_strndup(tcfg->endpoints, |
| 201 | (const char *) res->l2h, |
| 202 | msgb_l2len(res)); |
| 203 | } |
| 204 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 205 | return res; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 206 | } |
| 207 | |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 208 | static struct msgb *create_ok_resp_with_param(struct mgcp_endpoint *endp, |
| 209 | int code, const char *msg, |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 210 | const char *trans, const char *param) |
| 211 | { |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 212 | return create_resp(endp, code, " OK", msg, trans, param, NULL); |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 213 | } |
| 214 | |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 215 | static struct msgb *create_ok_response(struct mgcp_endpoint *endp, |
| 216 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 217 | { |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 218 | return create_ok_resp_with_param(endp, code, msg, trans, NULL); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 219 | } |
| 220 | |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 221 | static struct msgb *create_err_response(struct mgcp_endpoint *endp, |
| 222 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 223 | { |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 224 | return create_resp(endp, code, " FAIL", msg, trans, NULL, NULL); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 225 | } |
| 226 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 227 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 228 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 229 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 230 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | 5ea1bc7 | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 231 | const char *fmtp_extra = endp->bts_end.fmtp_extra; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 232 | char sdp_record[4096]; |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 233 | int len; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 234 | |
| 235 | if (!addr) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 236 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 237 | |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 238 | len = snprintf(sdp_record, sizeof(sdp_record) - 1, |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 239 | "I: %u%s\n\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 240 | "v=0\r\n" |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 241 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 242 | "c=IN IP4 %s\r\n" |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 243 | "t=0 0\r\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 244 | "m=audio %d RTP/AVP %d\r\n" |
Holger Hans Peter Freyther | 5ea1bc7 | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 245 | "a=rtpmap:%d %s\r\n" |
| 246 | "%s%s", |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 247 | endp->ci, endp->cfg->osmux && endp->osmux ? "\nX-Osmux: On" : "", |
| 248 | endp->ci, addr, addr, |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 249 | endp->net_end.local_port, endp->bts_end.payload_type, |
Holger Hans Peter Freyther | 5ea1bc7 | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 250 | endp->bts_end.payload_type, endp->tcfg->audio_name, |
| 251 | fmtp_extra ? fmtp_extra : "", fmtp_extra ? "\r\n" : ""); |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 252 | |
| 253 | if (len < 0 || len >= sizeof(sdp_record)) |
| 254 | goto buffer_too_small; |
| 255 | |
| 256 | if (endp->bts_end.packet_duration_ms > 0 && endp->tcfg->audio_send_ptime) { |
| 257 | int nchars = snprintf(sdp_record + len, sizeof(sdp_record) - len, |
| 258 | "a=ptime:%d\r\n", |
| 259 | endp->bts_end.packet_duration_ms); |
| 260 | if (nchars < 0 || nchars >= sizeof(sdp_record) - len) |
| 261 | goto buffer_too_small; |
| 262 | |
| 263 | len += nchars; |
| 264 | } |
Holger Hans Peter Freyther | a769dcb | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 265 | return create_resp(endp, 200, " OK", msg, trans_id, NULL, sdp_record); |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 266 | |
| 267 | buffer_too_small: |
| 268 | LOGP(DMGCP, LOGL_ERROR, "SDP buffer too small: %d (needed %d)\n", |
| 269 | sizeof(sdp_record), len); |
| 270 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 271 | } |
| 272 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 273 | /* |
| 274 | * handle incoming messages: |
| 275 | * - this can be a command (four letters, space, transaction id) |
| 276 | * - or a response (three numbers, space, transaction id) |
| 277 | */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 278 | 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] | 279 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 280 | struct mgcp_parse_data pdata; |
| 281 | int i, code, handled = 0; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 282 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 283 | char *data; |
Jacob Erlbeck | 9107e2d | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 284 | unsigned char *tail = msg->l2h + msgb_l2len(msg); /* char after l2 data */ |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 285 | |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 286 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | 0d904e0 | 2012-12-07 16:46:19 +0100 | [diff] [blame] | 287 | LOGP(DMGCP, LOGL_ERROR, "msg too short: %d\n", msg->len); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 288 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 289 | } |
| 290 | |
Jacob Erlbeck | 9107e2d | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 291 | /* Ensure that the msg->l2h is NUL terminated. */ |
| 292 | if (tail[-1] == '\0') |
| 293 | /* nothing to do */; |
| 294 | else if (msgb_tailroom(msg) > 0) |
| 295 | tail[0] = '\0'; |
| 296 | else if (tail[-1] == '\r' || tail[-1] == '\n') |
| 297 | tail[-1] = '\0'; |
| 298 | else { |
| 299 | LOGP(DMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| 300 | "Length: %d, Buffer size: %d\n", |
| 301 | msgb_l2len(msg), msg->data_len); |
| 302 | return NULL; |
| 303 | } |
| 304 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 305 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 306 | 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] | 307 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | 29de346 | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 308 | return NULL; |
| 309 | } |
| 310 | |
| 311 | msg->l3h = &msg->l2h[4]; |
| 312 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 313 | |
| 314 | /* |
| 315 | * Check for a duplicate message and respond. |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 316 | */ |
| 317 | memset(&pdata, 0, sizeof(pdata)); |
| 318 | pdata.cfg = cfg; |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 319 | data = strline_r((char *) msg->l3h, &pdata.save); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 320 | pdata.found = mgcp_analyze_header(&pdata, data); |
| 321 | if (pdata.endp && pdata.trans |
| 322 | && pdata.endp->last_trans |
| 323 | && strcmp(pdata.endp->last_trans, pdata.trans) == 0) { |
| 324 | return do_retransmission(pdata.endp); |
| 325 | } |
| 326 | |
Holger Hans Peter Freyther | 29de346 | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 327 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) { |
| 328 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
| 329 | handled = 1; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 330 | resp = mgcp_requests[i].handle_request(&pdata); |
Holger Hans Peter Freyther | 29de346 | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 331 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 332 | } |
| 333 | } |
| 334 | |
Holger Hans Peter Freyther | 29de346 | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 335 | if (!handled) |
| 336 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
| 337 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 338 | return resp; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 339 | } |
| 340 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 341 | /** |
| 342 | * We have a null terminated string with the endpoint name here. We only |
| 343 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 344 | * seen on the trunk side. |
| 345 | */ |
| 346 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 347 | const char *mgcp) |
| 348 | { |
| 349 | char *rest = NULL; |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 350 | struct mgcp_trunk_config *tcfg; |
| 351 | int trunk, endp; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 352 | |
| 353 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 354 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 355 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 356 | return NULL; |
| 357 | } |
| 358 | |
| 359 | endp = strtoul(rest + 1, &rest, 10); |
| 360 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 361 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 362 | return NULL; |
| 363 | } |
| 364 | |
| 365 | /* signalling is on timeslot 1 */ |
| 366 | if (endp == 1) |
| 367 | return NULL; |
| 368 | |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 369 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 370 | if (!tcfg) { |
| 371 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 372 | return NULL; |
| 373 | } |
| 374 | |
| 375 | if (!tcfg->endpoints) { |
| 376 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 377 | return NULL; |
| 378 | } |
| 379 | |
| 380 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 381 | LOGP(DMGCP, LOGL_ERROR, "Failed to find endpoint '%s'\n", mgcp); |
Holger Hans Peter Freyther | 45c2184 | 2011-01-07 11:36:54 +0100 | [diff] [blame] | 382 | return NULL; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 383 | } |
| 384 | |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 385 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 386 | } |
| 387 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 388 | 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] | 389 | { |
| 390 | char *endptr = NULL; |
| 391 | unsigned int gw = INT_MAX; |
| 392 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 393 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 394 | return find_e1_endpoint(cfg, mgcp); |
| 395 | } else { |
| 396 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 397 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 398 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 399 | } |
| 400 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 401 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 402 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 403 | } |
| 404 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 405 | /** |
| 406 | * @returns 0 when the status line was complete and transaction_id and |
| 407 | * endp out parameters are set. |
| 408 | */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 409 | static int mgcp_analyze_header(struct mgcp_parse_data *pdata, char *data) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 410 | { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 411 | int i = 0; |
Holger Hans Peter Freyther | 1eba7de | 2013-07-03 10:23:35 +0200 | [diff] [blame] | 412 | char *elem, *save = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 413 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 414 | pdata->trans = "000000"; |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 415 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 416 | for (elem = strtok_r(data, " ", &save); elem; |
| 417 | elem = strtok_r(NULL, " ", &save)) { |
| 418 | switch (i) { |
| 419 | case 0: |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 420 | pdata->trans = elem; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 421 | break; |
| 422 | case 1: |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 423 | pdata->endp = find_endpoint(pdata->cfg, elem); |
| 424 | if (!pdata->endp) { |
| 425 | LOGP(DMGCP, LOGL_ERROR, |
| 426 | "Unable to find Endpoint `%s'\n", elem); |
| 427 | return -1; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 428 | } |
| 429 | break; |
| 430 | case 2: |
| 431 | if (strcmp("MGCP", elem)) { |
| 432 | LOGP(DMGCP, LOGL_ERROR, |
| 433 | "MGCP header parsing error\n"); |
| 434 | return -1; |
| 435 | } |
| 436 | break; |
| 437 | case 3: |
| 438 | if (strcmp("1.0", elem)) { |
| 439 | LOGP(DMGCP, LOGL_ERROR, "MGCP version `%s' " |
| 440 | "not supported\n", elem); |
| 441 | return -1; |
| 442 | } |
| 443 | break; |
| 444 | } |
| 445 | i++; |
| 446 | } |
| 447 | |
| 448 | if (i != 4) { |
| 449 | LOGP(DMGCP, LOGL_ERROR, "MGCP status line too short.\n"); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 450 | pdata->trans = "000000"; |
| 451 | pdata->endp = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 452 | return -1; |
| 453 | } |
| 454 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 455 | return 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 459 | const char *callid) |
| 460 | { |
| 461 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 462 | 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] | 463 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 464 | return -1; |
| 465 | } |
| 466 | |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 471 | const char *_ci) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 472 | { |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 473 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 474 | |
| 475 | if (ci != endp->ci) { |
| 476 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 477 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 478 | return -1; |
| 479 | } |
| 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 484 | static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 485 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 486 | if (p->found != 0) |
| 487 | return create_err_response(NULL, 500, "AUEP", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 488 | else |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 489 | return create_ok_response(p->endp, 200, "AUEP", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 490 | } |
| 491 | |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 492 | static int parse_conn_mode(const char *msg, struct mgcp_endpoint *endp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 493 | { |
| 494 | int ret = 0; |
| 495 | if (strcmp(msg, "recvonly") == 0) |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 496 | endp->conn_mode = MGCP_CONN_RECV_ONLY; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 497 | else if (strcmp(msg, "sendrecv") == 0) |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 498 | endp->conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | e02860a | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 499 | else if (strcmp(msg, "sendonly") == 0) |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 500 | endp->conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 98a3877 | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 501 | else if (strcmp(msg, "loopback") == 0) |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 502 | endp->conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 503 | else { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 504 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 505 | ret = -1; |
| 506 | } |
| 507 | |
Jacob Erlbeck | e35fd13 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 508 | endp->net_end.output_enabled = |
| 509 | endp->conn_mode & MGCP_CONN_SEND_ONLY ? 1 : 0; |
| 510 | endp->bts_end.output_enabled = |
| 511 | endp->conn_mode & MGCP_CONN_RECV_ONLY ? 1 : 0; |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 512 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 513 | return ret; |
| 514 | } |
| 515 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 516 | 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] | 517 | struct mgcp_port_range *range, |
| 518 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 519 | { |
| 520 | int i; |
| 521 | |
| 522 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 523 | end->local_alloc = PORT_ALLOC_STATIC; |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | /* attempt to find a port */ |
| 528 | for (i = 0; i < 200; ++i) { |
| 529 | int rc; |
| 530 | |
| 531 | if (range->last_port >= range->range_end) |
| 532 | range->last_port = range->range_start; |
| 533 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 534 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 535 | |
| 536 | range->last_port += 2; |
| 537 | if (rc == 0) { |
| 538 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | } |
| 543 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 544 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 545 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 546 | return -1; |
| 547 | } |
| 548 | |
| 549 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 550 | { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 551 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 552 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 553 | return -1; |
| 554 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 555 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 556 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 557 | mgcp_rtp_end_reset(&endp->net_end); |
| 558 | return -1; |
| 559 | } |
| 560 | |
Holger Hans Peter Freyther | 6990687 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 561 | if (endp->cfg->transcoder_ip && endp->tcfg->trunk_type == MGCP_TRUNK_VIRTUAL) { |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 562 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 563 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 564 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 565 | mgcp_rtp_end_reset(&endp->net_end); |
| 566 | mgcp_rtp_end_reset(&endp->bts_end); |
| 567 | return -1; |
| 568 | } |
| 569 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 570 | if (allocate_port(endp, &endp->trans_bts, |
| 571 | &endp->cfg->transcoder_ports, |
| 572 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 573 | mgcp_rtp_end_reset(&endp->net_end); |
| 574 | mgcp_rtp_end_reset(&endp->bts_end); |
| 575 | mgcp_rtp_end_reset(&endp->trans_net); |
| 576 | return -1; |
| 577 | } |
| 578 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 579 | /* remember that we have set up transcoding */ |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 580 | endp->type = MGCP_RTP_TRANSCODED; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 581 | } |
| 582 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 583 | return 0; |
| 584 | } |
| 585 | |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 586 | static int parse_sdp_data(struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p) |
| 587 | { |
| 588 | char *line; |
| 589 | int found_media = 0; |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 590 | int audio_payload = -1; |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 591 | |
| 592 | for_each_line(line, p->save) { |
| 593 | switch (line[0]) { |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 594 | case 'o': |
| 595 | case 's': |
| 596 | case 't': |
| 597 | case 'v': |
| 598 | /* skip these SDP attributes */ |
| 599 | break; |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 600 | case 'a': { |
| 601 | int payload; |
| 602 | int rate; |
| 603 | int channels = 1; |
| 604 | int ptime, ptime2 = 0; |
| 605 | char audio_name[64]; |
| 606 | char audio_codec[64]; |
| 607 | |
| 608 | if (audio_payload == -1) |
| 609 | break; |
| 610 | |
| 611 | if (sscanf(line, "a=rtpmap:%d %64s", |
| 612 | &payload, audio_name) == 2) { |
| 613 | if (payload != audio_payload) |
| 614 | break; |
| 615 | |
| 616 | if (sscanf(audio_name, "%[^/]/%d/%d", |
| 617 | audio_codec, &rate, &channels) < 2) |
| 618 | break; |
| 619 | |
| 620 | rtp->rate = rate; |
| 621 | if (channels != 1) |
| 622 | LOGP(DMGCP, LOGL_NOTICE, |
| 623 | "Channels != 1 in SDP: '%s' on 0x%x\n", |
| 624 | line, ENDPOINT_NUMBER(p->endp)); |
| 625 | } else if (sscanf(line, "a=ptime:%d-%d", |
| 626 | &ptime, &ptime2) >= 1) { |
| 627 | if (ptime2 > 0 && ptime2 != ptime) |
| 628 | rtp->packet_duration_ms = 0; |
| 629 | else |
| 630 | rtp->packet_duration_ms = ptime; |
| 631 | } else if (sscanf(line, "a=maxptime:%d", &ptime2) == 1) { |
| 632 | if (ptime2 * rtp->frame_duration_den > |
| 633 | rtp->frame_duration_num * 1500) |
| 634 | /* more than 1 frame */ |
| 635 | rtp->packet_duration_ms = 0; |
| 636 | } |
| 637 | break; |
| 638 | } |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 639 | case 'm': { |
| 640 | int port; |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 641 | audio_payload = -1; |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 642 | |
| 643 | if (sscanf(line, "m=audio %d RTP/AVP %d", |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 644 | &port, &audio_payload) == 2) { |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 645 | rtp->rtp_port = htons(port); |
| 646 | rtp->rtcp_port = htons(port + 1); |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 647 | rtp->payload_type = audio_payload; |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 648 | found_media = 1; |
| 649 | } |
| 650 | break; |
| 651 | } |
| 652 | case 'c': { |
| 653 | char ipv4[16]; |
| 654 | |
| 655 | if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) { |
| 656 | inet_aton(ipv4, &rtp->addr); |
| 657 | } |
| 658 | break; |
| 659 | } |
| 660 | default: |
| 661 | if (p->endp) |
| 662 | LOGP(DMGCP, LOGL_NOTICE, |
| 663 | "Unhandled SDP option: '%c'/%d on 0x%x\n", |
| 664 | line[0], line[0], ENDPOINT_NUMBER(p->endp)); |
| 665 | else |
| 666 | LOGP(DMGCP, LOGL_NOTICE, |
| 667 | "Unhandled SDP option: '%c'/%d\n", |
| 668 | line[0], line[0]); |
| 669 | break; |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | if (found_media) |
| 674 | LOGP(DMGCP, LOGL_NOTICE, |
Jacob Erlbeck | 24754f0 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 675 | "Got media info via SDP: port %d, payload %d, " |
| 676 | "duration %d, addr %s\n", |
| 677 | ntohs(rtp->rtp_port), rtp->payload_type, |
| 678 | rtp->packet_duration_ms, inet_ntoa(rtp->addr)); |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 679 | |
| 680 | return found_media; |
| 681 | } |
| 682 | |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 683 | /* Set the LCO from a string (see RFC 3435). |
| 684 | * The string is stored in the 'string' field. A NULL string is handled excatly |
| 685 | * like an empty string, the 'string' field is never NULL after this function |
| 686 | * has been called. */ |
| 687 | static void set_local_cx_options(void *ctx, struct mgcp_lco *lco, |
| 688 | const char *options) |
| 689 | { |
| 690 | char *p_opt; |
| 691 | |
| 692 | talloc_free(lco->string); |
| 693 | lco->pkt_period_min = lco->pkt_period_max = 0; |
| 694 | lco->string = talloc_strdup(ctx, options ? options : ""); |
| 695 | |
| 696 | p_opt = strstr(lco->string, "p:"); |
| 697 | if (p_opt && sscanf(p_opt, "p:%d-%d", |
| 698 | &lco->pkt_period_min, &lco->pkt_period_max) == 1) |
| 699 | lco->pkt_period_max = lco->pkt_period_min; |
| 700 | } |
| 701 | |
Jacob Erlbeck | db2d431 | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 702 | void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change, |
| 703 | struct mgcp_rtp_end *rtp) |
| 704 | { |
| 705 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 706 | |
Jacob Erlbeck | e2292f3 | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 707 | int patch_ssrc = expect_ssrc_change && tcfg->force_constant_ssrc; |
| 708 | |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 709 | rtp->force_aligned_timing = tcfg->force_aligned_timing; |
Jacob Erlbeck | e2292f3 | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 710 | rtp->force_constant_ssrc = patch_ssrc ? 1 : 0; |
Jacob Erlbeck | db2d431 | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 711 | |
| 712 | LOGP(DMGCP, LOGL_DEBUG, |
| 713 | "Configuring RTP endpoint: local port %d%s%s\n", |
| 714 | ntohs(rtp->rtp_port), |
Jacob Erlbeck | 4bbddc6 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 715 | rtp->force_aligned_timing ? ", force constant timing" : "", |
Jacob Erlbeck | db2d431 | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 716 | rtp->force_constant_ssrc ? ", force constant ssrc" : ""); |
| 717 | } |
| 718 | |
Jacob Erlbeck | f6ec0e9 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 719 | uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp, |
| 720 | struct mgcp_rtp_end *rtp) |
| 721 | { |
| 722 | int f = 0; |
| 723 | |
| 724 | /* Get the number of frames per channel and packet */ |
| 725 | if (rtp->frames_per_packet) |
| 726 | f = rtp->frames_per_packet; |
| 727 | else if (rtp->packet_duration_ms && rtp->frame_duration_num) { |
| 728 | int den = 1000 * rtp->frame_duration_num; |
| 729 | f = (rtp->packet_duration_ms * rtp->frame_duration_den + den/2) |
| 730 | / den; |
| 731 | } |
| 732 | |
| 733 | return rtp->rate * f * rtp->frame_duration_num / rtp->frame_duration_den; |
| 734 | } |
| 735 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 736 | static struct msgb *handle_create_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 737 | { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 738 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 739 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 740 | int error_code = 400; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 741 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 742 | const char *local_options = NULL; |
| 743 | const char *callid = NULL; |
| 744 | const char *mode = NULL; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 745 | char *line; |
Jacob Erlbeck | 78a9501 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 746 | int have_sdp = 0; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 747 | |
| 748 | if (p->found != 0) |
| 749 | return create_err_response(NULL, 510, "CRCX", p->trans); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 750 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 751 | /* parse CallID C: and LocalParameters L: */ |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 752 | for_each_line(line, p->save) { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 753 | switch (line[0]) { |
| 754 | case 'L': |
| 755 | local_options = (const char *) line + 3; |
| 756 | break; |
| 757 | case 'C': |
| 758 | callid = (const char *) line + 3; |
| 759 | break; |
| 760 | case 'M': |
| 761 | mode = (const char *) line + 3; |
| 762 | break; |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 763 | case 'X': |
| 764 | if (strcmp("Osmux: on", line + 2) == 0 && |
| 765 | osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 766 | LOGP(DMGCP, LOGL_ERROR, |
| 767 | "Could not activate osmux in endpoint %d\n", |
| 768 | ENDPOINT_NUMBER(endp)); |
| 769 | } |
| 770 | break; |
Jacob Erlbeck | 78a9501 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 771 | case '\0': |
| 772 | have_sdp = 1; |
| 773 | goto mgcp_header_done; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 774 | default: |
| 775 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 776 | *line, *line, ENDPOINT_NUMBER(endp)); |
| 777 | break; |
| 778 | } |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 779 | } |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 780 | |
Jacob Erlbeck | 78a9501 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 781 | mgcp_header_done: |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 782 | tcfg = p->endp->tcfg; |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 783 | |
| 784 | /* Check required data */ |
| 785 | if (!callid || !mode) { |
| 786 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 787 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 788 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 789 | } |
| 790 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 791 | if (endp->allocated) { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 792 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 793 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 794 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 32d4e50 | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 795 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 796 | if (p->cfg->realloc_cb) |
| 797 | p->cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 798 | } else { |
| 799 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 800 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 801 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 802 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 803 | } |
| 804 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 805 | /* copy some parameters */ |
| 806 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 807 | |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 808 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 809 | local_options); |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 810 | |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 811 | if (parse_conn_mode(mode, endp) != 0) { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 812 | error_code = 517; |
| 813 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 814 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 815 | |
| 816 | /* initialize */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 817 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Jacob Erlbeck | db2d431 | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 818 | mgcp_rtp_end_config(endp, 0, &endp->net_end); |
| 819 | mgcp_rtp_end_config(endp, 0, &endp->bts_end); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 820 | |
| 821 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 822 | 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] | 823 | |
| 824 | /* bind to the port now */ |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 825 | if (allocate_ports(endp) != 0) |
| 826 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 827 | |
| 828 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 829 | endp->ci = generate_call_id(p->cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 830 | if (endp->ci == CI_UNUSED) |
| 831 | goto error2; |
| 832 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 833 | endp->allocated = 1; |
Jacob Erlbeck | 78a9501 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 834 | |
| 835 | /* set up RTP media parameters */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 836 | endp->bts_end.payload_type = tcfg->audio_payload; |
Holger Hans Peter Freyther | 5ea1bc7 | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 837 | endp->bts_end.fmtp_extra = talloc_strdup(tcfg->endpoints, |
| 838 | tcfg->audio_fmtp_extra); |
Jacob Erlbeck | 78a9501 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 839 | if (have_sdp) |
| 840 | parse_sdp_data(&endp->net_end, p); |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 841 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 842 | /* policy CB */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 843 | if (p->cfg->policy_cb) { |
| 844 | int rc; |
| 845 | rc = p->cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), |
| 846 | MGCP_ENDP_CRCX, p->trans); |
| 847 | switch (rc) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 848 | case MGCP_POLICY_REJECT: |
| 849 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 850 | ENDPOINT_NUMBER(endp)); |
| 851 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 852 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 853 | break; |
| 854 | case MGCP_POLICY_DEFER: |
| 855 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 856 | create_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 857 | return NULL; |
| 858 | break; |
| 859 | case MGCP_POLICY_CONT: |
| 860 | /* just continue */ |
| 861 | break; |
| 862 | } |
| 863 | } |
| 864 | |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 865 | 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] | 866 | ENDPOINT_NUMBER(endp), endp->ci, |
| 867 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 868 | if (p->cfg->change_cb) |
| 869 | p->cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 77f7afe | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 870 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 871 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && tcfg->keepalive_interval != 0) { |
| 872 | if (endp->osmux) |
| 873 | osmux_send_dummy(endp); |
| 874 | else |
| 875 | mgcp_send_dummy(endp); |
| 876 | } |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 877 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 878 | create_transcoder(endp); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 879 | return create_response_with_sdp(endp, "CRCX", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 880 | error2: |
Holger Hans Peter Freyther | 414bf40 | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 881 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 882 | LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 883 | return create_err_response(endp, error_code, "CRCX", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 884 | } |
| 885 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 886 | static struct msgb *handle_modify_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 887 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 888 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 889 | int error_code = 500; |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 890 | int silent = 0, osmux = 0; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 891 | char *line; |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 892 | const char *local_options = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 893 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 894 | if (p->found != 0) |
| 895 | return create_err_response(NULL, 510, "MDCX", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 896 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 897 | if (endp->ci == CI_UNUSED) { |
| 898 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 899 | "holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 900 | return create_err_response(endp, 400, "MDCX", p->trans); |
| 901 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 902 | |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 903 | for_each_line(line, p->save) { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 904 | switch (line[0]) { |
| 905 | case 'C': { |
| 906 | if (verify_call_id(endp, line + 3) != 0) |
| 907 | goto error3; |
| 908 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 909 | } |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 910 | case 'I': { |
| 911 | if (verify_ci(endp, line + 3) != 0) |
| 912 | goto error3; |
| 913 | break; |
| 914 | } |
| 915 | case 'L': |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 916 | local_options = (const char *) line + 3; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 917 | break; |
| 918 | case 'M': |
Jacob Erlbeck | 2645c9e | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 919 | if (parse_conn_mode(line + 3, endp) != 0) { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 920 | error_code = 517; |
| 921 | goto error3; |
| 922 | } |
| 923 | endp->orig_mode = endp->conn_mode; |
| 924 | break; |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 925 | case 'X': |
| 926 | if (strcmp("Osmux: on", line + 2) == 0) |
| 927 | osmux = 1; |
| 928 | break; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 929 | case 'Z': |
| 930 | silent = strcmp("noanswer", line + 3) == 0; |
| 931 | break; |
| 932 | case '\0': |
| 933 | /* SDP file begins */ |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 934 | parse_sdp_data(&endp->net_end, p); |
| 935 | /* This will exhaust p->save, so the loop will |
| 936 | * terminate next time. |
| 937 | */ |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 938 | break; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 939 | default: |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 940 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled MGCP option: '%c'/%d on 0x%x\n", |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 941 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 942 | break; |
| 943 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 944 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 945 | |
Pablo Neira Ayuso | cab6e75 | 2014-02-05 18:56:17 +0100 | [diff] [blame^] | 946 | /* Re-enable Osmux if we receive a MDCX, we have to set up a new |
| 947 | * RTP flow: this generates a randomly allocated RTP SSRC and sequence |
| 948 | * number. |
| 949 | */ |
| 950 | if (osmux) { |
| 951 | if (osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 952 | LOGP(DMGCP, LOGL_ERROR, |
| 953 | "Could not update osmux in endpoint %d\n", |
| 954 | ENDPOINT_NUMBER(endp)); |
| 955 | } |
| 956 | LOGP(DMGCP, LOGL_NOTICE, |
| 957 | "Re-enabling osmux in endpoint %d, we got updated\n", |
| 958 | ENDPOINT_NUMBER(endp)); |
| 959 | } |
| 960 | |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 961 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 962 | local_options); |
| 963 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 964 | /* policy CB */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 965 | if (p->cfg->policy_cb) { |
| 966 | int rc; |
| 967 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 968 | MGCP_ENDP_MDCX, p->trans); |
| 969 | switch (rc) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 970 | case MGCP_POLICY_REJECT: |
| 971 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 972 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 973 | if (silent) |
| 974 | goto out_silent; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 975 | return create_err_response(endp, 400, "MDCX", p->trans); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 976 | break; |
| 977 | case MGCP_POLICY_DEFER: |
| 978 | /* stop processing */ |
| 979 | return NULL; |
| 980 | break; |
| 981 | case MGCP_POLICY_CONT: |
| 982 | /* just continue */ |
| 983 | break; |
| 984 | } |
| 985 | } |
| 986 | |
Jacob Erlbeck | db2d431 | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 987 | mgcp_rtp_end_config(endp, 1, &endp->net_end); |
| 988 | mgcp_rtp_end_config(endp, 1, &endp->bts_end); |
| 989 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 990 | /* modify */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 991 | 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] | 992 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 993 | if (p->cfg->change_cb) |
| 994 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 995 | |
Jacob Erlbeck | e35fd13 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 996 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && |
| 997 | endp->tcfg->keepalive_interval != 0) |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 998 | mgcp_send_dummy(endp); |
| 999 | |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1000 | if (silent) |
| 1001 | goto out_silent; |
| 1002 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1003 | return create_response_with_sdp(endp, "MDCX", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1004 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1005 | error3: |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1006 | return create_err_response(endp, error_code, "MDCX", p->trans); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1007 | |
| 1008 | |
| 1009 | out_silent: |
| 1010 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1011 | } |
| 1012 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1013 | static struct msgb *handle_delete_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1014 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1015 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 1016 | int error_code = 400; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1017 | int silent = 0; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1018 | char *line; |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1019 | char stats[1048]; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1020 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1021 | if (p->found != 0) |
| 1022 | return create_err_response(NULL, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1023 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1024 | if (!p->endp->allocated) { |
| 1025 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", |
| 1026 | ENDPOINT_NUMBER(endp)); |
| 1027 | return create_err_response(endp, 400, "DLCX", p->trans); |
| 1028 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1029 | |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1030 | for_each_line(line, p->save) { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1031 | switch (line[0]) { |
| 1032 | case 'C': |
| 1033 | if (verify_call_id(endp, line + 3) != 0) |
| 1034 | goto error3; |
| 1035 | break; |
| 1036 | case 'I': |
| 1037 | if (verify_ci(endp, line + 3) != 0) |
| 1038 | goto error3; |
| 1039 | break; |
| 1040 | case 'Z': |
| 1041 | silent = strcmp("noanswer", line + 3) == 0; |
| 1042 | break; |
| 1043 | default: |
| 1044 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 1045 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 1046 | break; |
| 1047 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1048 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1049 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1050 | /* policy CB */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1051 | if (p->cfg->policy_cb) { |
| 1052 | int rc; |
| 1053 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 1054 | MGCP_ENDP_DLCX, p->trans); |
| 1055 | switch (rc) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1056 | case MGCP_POLICY_REJECT: |
| 1057 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 1058 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1059 | if (silent) |
| 1060 | goto out_silent; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1061 | return create_err_response(endp, 400, "DLCX", p->trans); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1062 | break; |
| 1063 | case MGCP_POLICY_DEFER: |
| 1064 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1065 | delete_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1066 | return NULL; |
| 1067 | break; |
| 1068 | case MGCP_POLICY_CONT: |
| 1069 | /* just continue */ |
| 1070 | break; |
| 1071 | } |
| 1072 | } |
| 1073 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1074 | /* free the connection */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 1075 | 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] | 1076 | 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] | 1077 | |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1078 | /* save the statistics of the current call */ |
| 1079 | mgcp_format_stats(endp, stats, sizeof(stats)); |
| 1080 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1081 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1082 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1083 | if (p->cfg->change_cb) |
| 1084 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1085 | |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1086 | if (silent) |
| 1087 | goto out_silent; |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1088 | return create_ok_resp_with_param(endp, 250, "DLCX", p->trans, stats); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1089 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1090 | error3: |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1091 | return create_err_response(endp, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1092 | |
| 1093 | out_silent: |
| 1094 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1095 | } |
| 1096 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1097 | static struct msgb *handle_rsip(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1098 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1099 | if (p->found != 0) { |
Holger Hans Peter Freyther | 74db774 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 1100 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 1101 | return NULL; |
| 1102 | } |
| 1103 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1104 | if (p->cfg->reset_cb) |
| 1105 | p->cfg->reset_cb(p->endp->tcfg); |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1106 | return NULL; |
| 1107 | } |
| 1108 | |
Holger Hans Peter Freyther | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1109 | static char extract_tone(const char *line) |
| 1110 | { |
| 1111 | const char *str = strstr(line, "D/"); |
| 1112 | if (!str) |
| 1113 | return CHAR_MAX; |
| 1114 | |
| 1115 | return str[2]; |
| 1116 | } |
| 1117 | |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1118 | /* |
| 1119 | * This can request like DTMF detection and forward, fax detection... it |
| 1120 | * can also request when the notification should be send and such. We don't |
| 1121 | * do this right now. |
| 1122 | */ |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1123 | static struct msgb *handle_noti_req(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1124 | { |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1125 | int res = 0; |
| 1126 | char *line; |
Holger Hans Peter Freyther | 9f3835b | 2013-05-21 17:04:35 +0200 | [diff] [blame] | 1127 | char tone = CHAR_MAX; |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1128 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1129 | if (p->found != 0) |
| 1130 | return create_err_response(NULL, 400, "RQNT", p->trans); |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1131 | |
Jacob Erlbeck | 1771171 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1132 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1133 | switch (line[0]) { |
| 1134 | case 'S': |
| 1135 | tone = extract_tone(line); |
| 1136 | break; |
| 1137 | } |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1138 | } |
Holger Hans Peter Freyther | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1139 | |
| 1140 | /* we didn't see a signal request with a tone */ |
| 1141 | if (tone == CHAR_MAX) |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1142 | return create_ok_response(p->endp, 200, "RQNT", p->trans); |
Holger Hans Peter Freyther | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1143 | |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1144 | if (p->cfg->rqnt_cb) |
| 1145 | res = p->cfg->rqnt_cb(p->endp, tone); |
Holger Hans Peter Freyther | 8d0be25 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1146 | |
| 1147 | return res == 0 ? |
Holger Hans Peter Freyther | ce55361 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1148 | create_ok_response(p->endp, 200, "RQNT", p->trans) : |
| 1149 | create_err_response(p->endp, res, "RQNT", p->trans); |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1150 | } |
| 1151 | |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1152 | static void mgcp_keepalive_timer_cb(void *_tcfg) |
| 1153 | { |
| 1154 | struct mgcp_trunk_config *tcfg = _tcfg; |
| 1155 | int i; |
| 1156 | LOGP(DMGCP, LOGL_DEBUG, "Triggered trunk %d keepalive timer.\n", |
| 1157 | tcfg->trunk_nr); |
| 1158 | |
| 1159 | if (tcfg->keepalive_interval <= 0) |
| 1160 | return; |
| 1161 | |
| 1162 | for (i = 1; i < tcfg->number_endpoints; ++i) { |
| 1163 | struct mgcp_endpoint *endp = &tcfg->endpoints[i]; |
| 1164 | if (endp->conn_mode == MGCP_CONN_RECV_ONLY) |
| 1165 | mgcp_send_dummy(endp); |
| 1166 | } |
| 1167 | |
| 1168 | LOGP(DMGCP, LOGL_DEBUG, "Rescheduling trunk %d keepalive timer.\n", |
| 1169 | tcfg->trunk_nr); |
| 1170 | osmo_timer_schedule(&tcfg->keepalive_timer, tcfg->keepalive_interval, 0); |
| 1171 | } |
| 1172 | |
| 1173 | void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval) |
| 1174 | { |
| 1175 | tcfg->keepalive_interval = interval; |
| 1176 | tcfg->keepalive_timer.data = tcfg; |
| 1177 | tcfg->keepalive_timer.cb = mgcp_keepalive_timer_cb; |
| 1178 | |
| 1179 | if (interval <= 0) |
| 1180 | osmo_timer_del(&tcfg->keepalive_timer); |
| 1181 | else |
| 1182 | osmo_timer_schedule(&tcfg->keepalive_timer, |
| 1183 | tcfg->keepalive_interval, 0); |
| 1184 | } |
| 1185 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1186 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1187 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1188 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1189 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1190 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 1191 | if (!cfg) { |
| 1192 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 1193 | return NULL; |
| 1194 | } |
| 1195 | |
| 1196 | cfg->source_port = 2427; |
| 1197 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1198 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1199 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 15e7389 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 1200 | |
| 1201 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 1202 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1203 | |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1204 | /* default trunk handling */ |
| 1205 | cfg->trunk.cfg = cfg; |
| 1206 | cfg->trunk.trunk_nr = 0; |
| 1207 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 1208 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1209 | cfg->trunk.audio_payload = 126; |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1210 | cfg->trunk.audio_send_ptime = 1; |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1211 | cfg->trunk.omit_rtcp = 0; |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1212 | mgcp_trunk_set_keepalive(&cfg->trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1213 | |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1214 | INIT_LLIST_HEAD(&cfg->trunks); |
| 1215 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1216 | return cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1217 | } |
| 1218 | |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1219 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 1220 | { |
| 1221 | struct mgcp_trunk_config *trunk; |
| 1222 | |
| 1223 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 1224 | if (!trunk) { |
| 1225 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 1226 | return NULL; |
| 1227 | } |
| 1228 | |
| 1229 | trunk->cfg = cfg; |
| 1230 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 1231 | trunk->trunk_nr = nr; |
| 1232 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1233 | trunk->audio_payload = 126; |
Jacob Erlbeck | 0a1bc56 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1234 | trunk->audio_send_ptime = 1; |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1235 | trunk->number_endpoints = 33; |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1236 | trunk->omit_rtcp = 0; |
Jacob Erlbeck | 075a9eb | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1237 | mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1238 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 1239 | return trunk; |
| 1240 | } |
| 1241 | |
| 1242 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 1243 | { |
| 1244 | struct mgcp_trunk_config *trunk; |
| 1245 | |
| 1246 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 1247 | if (trunk->trunk_nr == index) |
| 1248 | return trunk; |
| 1249 | |
| 1250 | return NULL; |
| 1251 | } |
| 1252 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1253 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 1254 | { |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1255 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1256 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1257 | end->local_port = 0; |
| 1258 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1259 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1260 | end->packets = 0; |
Holger Hans Peter Freyther | 952f752 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 1261 | end->octets = 0; |
Jacob Erlbeck | 0970bab | 2013-12-19 12:13:32 +0100 | [diff] [blame] | 1262 | end->dropped_packets = 0; |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1263 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1264 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1265 | end->payload_type = -1; |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1266 | end->local_alloc = -1; |
Holger Hans Peter Freyther | 5ea1bc7 | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 1267 | talloc_free(end->fmtp_extra); |
| 1268 | end->fmtp_extra = NULL; |
Jacob Erlbeck | 72c3090 | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 1269 | |
| 1270 | /* Set default values */ |
| 1271 | end->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM; |
| 1272 | end->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN; |
Jacob Erlbeck | f6ec0e9 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 1273 | end->frames_per_packet = 0; /* unknown */ |
| 1274 | end->packet_duration_ms = DEFAULT_RTP_AUDIO_PACKET_DURATION_MS; |
| 1275 | end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; |
Jacob Erlbeck | 8857c90 | 2014-01-16 16:50:39 +0100 | [diff] [blame] | 1276 | end->output_enabled = 0; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1277 | } |
| 1278 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1279 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 1280 | { |
| 1281 | mgcp_rtp_end_reset(end); |
| 1282 | end->rtp.fd = -1; |
| 1283 | end->rtcp.fd = -1; |
| 1284 | } |
| 1285 | |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1286 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1287 | { |
| 1288 | int i; |
| 1289 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1290 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1291 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1292 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1293 | tcfg->number_endpoints, "endpoints"); |
| 1294 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1295 | return -1; |
| 1296 | |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1297 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 1298 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1299 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1300 | tcfg->endpoints[i].tcfg = tcfg; |
| 1301 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 1302 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 1303 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 1304 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1305 | } |
| 1306 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1307 | return 0; |
| 1308 | } |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1309 | |
| 1310 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 1311 | { |
Holger Hans Peter Freyther | c77efdf | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 1312 | 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] | 1313 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 1314 | endp->allocated = 0; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1315 | |
Holger Hans Peter Freyther | 01d315f | 2012-12-07 11:52:16 +0100 | [diff] [blame] | 1316 | talloc_free(endp->callid); |
| 1317 | endp->callid = NULL; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1318 | |
Jacob Erlbeck | 2c2ca4d | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1319 | talloc_free(endp->local_options.string); |
| 1320 | endp->local_options.string = NULL; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1321 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1322 | mgcp_rtp_end_reset(&endp->bts_end); |
| 1323 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1324 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1325 | mgcp_rtp_end_reset(&endp->trans_bts); |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1326 | endp->type = MGCP_RTP_DEFAULT; |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 1327 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 1328 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 1329 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 1330 | |
| 1331 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 1332 | |
| 1333 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1334 | } |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1335 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1336 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 1337 | { |
| 1338 | struct sockaddr_in addr; |
| 1339 | |
| 1340 | memset(&addr, 0, sizeof(addr)); |
| 1341 | addr.sin_family = AF_INET; |
| 1342 | addr.sin_addr = cfg->transcoder_in; |
| 1343 | addr.sin_port = htons(2427); |
| 1344 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 1345 | (struct sockaddr *) &addr, sizeof(addr)); |
| 1346 | } |
| 1347 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1348 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 1349 | const char *msg, const char *mode) |
| 1350 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1351 | char buf[2096]; |
| 1352 | int len; |
| 1353 | |
| 1354 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 1355 | len = snprintf(buf, sizeof(buf), |
| 1356 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 1357 | "C: 4256\r\n" |
| 1358 | "M: %s\r\n" |
| 1359 | "\r\n" |
| 1360 | "c=IN IP4 %s\r\n" |
| 1361 | "m=audio %d RTP/AVP %d\r\n" |
| 1362 | "a=rtpmap:%d %s\r\n", |
| 1363 | msg, endpoint, mode, endp->cfg->source_addr, |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1364 | port, endp->tcfg->audio_payload, |
| 1365 | endp->tcfg->audio_payload, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1366 | |
| 1367 | if (len < 0) |
| 1368 | return; |
| 1369 | |
| 1370 | buf[sizeof(buf) - 1] = '\0'; |
| 1371 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1372 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1373 | } |
| 1374 | |
| 1375 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1376 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1377 | char buf[2096]; |
| 1378 | int len; |
| 1379 | |
| 1380 | len = snprintf(buf, sizeof(buf), |
| 1381 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1382 | "C: 4256\r\n" |
| 1383 | , endpoint); |
| 1384 | |
| 1385 | if (len < 0) |
| 1386 | return; |
| 1387 | |
| 1388 | buf[sizeof(buf) - 1] = '\0'; |
| 1389 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1390 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1391 | } |
| 1392 | |
Harald Welte | 6a85705 | 2012-01-27 00:41:39 +0100 | [diff] [blame] | 1393 | static int send_agent(struct mgcp_config *cfg, const char *buf, int len) |
| 1394 | { |
| 1395 | return write(cfg->gw_fd.bfd.fd, buf, len); |
| 1396 | } |
| 1397 | |
| 1398 | int mgcp_send_reset_all(struct mgcp_config *cfg) |
| 1399 | { |
| 1400 | static const char mgcp_reset[] = { |
| 1401 | "RSIP 1 *@mgw MGCP 1.0\r\n" |
| 1402 | }; |
| 1403 | |
| 1404 | return send_agent(cfg, mgcp_reset, sizeof mgcp_reset -1); |
| 1405 | } |
| 1406 | |
| 1407 | int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint) |
| 1408 | { |
| 1409 | char buf[128]; |
| 1410 | int len; |
| 1411 | |
| 1412 | len = snprintf(buf, sizeof(buf), |
| 1413 | "RSIP 39 %x@mgw MGCP 1.0\r\n" |
| 1414 | , endpoint); |
| 1415 | if (len < 0) |
| 1416 | return len; |
| 1417 | |
| 1418 | buf[sizeof(buf) - 1] = '\0'; |
| 1419 | |
| 1420 | return send_agent(endp->cfg, buf, len); |
| 1421 | } |
| 1422 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1423 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1424 | { |
| 1425 | int port; |
| 1426 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1427 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1428 | |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1429 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1430 | return; |
| 1431 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1432 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1433 | send_msg(endp, in_endp, endp->trans_bts.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1434 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1435 | send_msg(endp, out_endp, endp->trans_net.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1436 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1437 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1438 | endp->trans_bts.rtp_port = htons(port); |
| 1439 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1440 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1441 | port = rtp_calculate_port(out_endp, endp->cfg->transcoder_remote_base); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1442 | endp->trans_net.rtp_port = htons(port); |
| 1443 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1447 | { |
| 1448 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1449 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1450 | |
Pablo Neira Ayuso | 46bd424 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1451 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1452 | return; |
| 1453 | |
| 1454 | send_dlcx(endp, in_endp); |
| 1455 | send_dlcx(endp, out_endp); |
| 1456 | } |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1457 | |
| 1458 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1459 | { |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1460 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | cf1c877 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1461 | return 0; |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1462 | |
| 1463 | static const char mgcp_reset[] = { |
| 1464 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1465 | }; |
| 1466 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1467 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1468 | } |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1469 | |
| 1470 | void mgcp_format_stats(struct mgcp_endpoint *endp, char *msg, size_t size) |
| 1471 | { |
Holger Hans Peter Freyther | cb306a6 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1472 | uint32_t expected, jitter; |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1473 | int ploss; |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1474 | int nchars; |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1475 | mgcp_state_calc_loss(&endp->net_state, &endp->net_end, |
| 1476 | &expected, &ploss); |
Holger Hans Peter Freyther | cb306a6 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1477 | jitter = mgcp_state_calc_jitter(&endp->net_state); |
Holger Hans Peter Freyther | 38e02c5 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1478 | |
Jacob Erlbeck | 50079a1 | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1479 | nchars = snprintf(msg, size, |
| 1480 | "\r\nP: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1481 | endp->bts_end.packets, endp->bts_end.octets, |
| 1482 | endp->net_end.packets, endp->net_end.octets, |
| 1483 | ploss, jitter); |
| 1484 | if (nchars < 0 || nchars >= size) |
| 1485 | goto truncate; |
| 1486 | |
| 1487 | msg += nchars; |
| 1488 | size -= nchars; |
| 1489 | |
| 1490 | /* Error Counter */ |
| 1491 | snprintf(msg, size, |
| 1492 | "\r\nX-Osmo-CP: EC TIS=%u, TOS=%u, TIR=%u, TOR=%u", |
| 1493 | endp->net_state.in_stream.err_ts_counter, |
| 1494 | endp->net_state.out_stream.err_ts_counter, |
| 1495 | endp->bts_state.in_stream.err_ts_counter, |
| 1496 | endp->bts_state.out_stream.err_ts_counter); |
| 1497 | truncate: |
Holger Hans Peter Freyther | 0bf15a8 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1498 | msg[size - 1] = '\0'; |
| 1499 | } |
Holger Hans Peter Freyther | 462b7d7 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1500 | |
| 1501 | int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os, |
| 1502 | uint32_t *pr, uint32_t *_or, int *loss, uint32_t *jitter) |
| 1503 | { |
| 1504 | char *line, *save; |
| 1505 | int rc; |
| 1506 | |
| 1507 | /* initialize with bad values */ |
| 1508 | *ps = *os = *pr = *_or = *jitter = UINT_MAX; |
| 1509 | *loss = INT_MAX; |
| 1510 | |
| 1511 | |
| 1512 | line = strtok_r((char *) msg->l2h, "\r\n", &save); |
| 1513 | if (!line) |
| 1514 | return -1; |
| 1515 | |
| 1516 | /* this can only parse the message that is created above... */ |
Jacob Erlbeck | a01bd60 | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 1517 | for_each_non_empty_line(line, save) { |
Holger Hans Peter Freyther | 462b7d7 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1518 | switch (line[0]) { |
| 1519 | case 'P': |
| 1520 | rc = sscanf(line, "P: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1521 | ps, os, pr, _or, loss, jitter); |
| 1522 | return rc == 6 ? 0 : -1; |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | return -1; |
| 1527 | } |