Holger Hans Peter Freyther | 26143c8 | 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 | 46880c2 | 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 | 26143c8 | 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 | 0e3e88e | 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 | 26143c8 | 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 | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 0e3e88e | 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 | 26143c8 | 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 | dd5fff4 | 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 | 6d419f9 | 2011-02-28 22:06:47 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 36 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 38 | |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 39 | #define for_each_non_empty_line(line, save) \ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 40 | for (line = strtok_r(NULL, "\r\n", &save); line;\ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 41 | line = strtok_r(NULL, "\r\n", &save)) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 42 | |
Jacob Erlbeck | e7060c4 | 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 | ac9f6ce | 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 |
| 78 | #define DEFAULT_RTP_AUDIO_FRAMES_PER_PACKET 1 |
| 79 | #define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000 |
| 80 | |
Holger Hans Peter Freyther | 05d8f5f | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 82 | |
Holger Hans Peter Freyther | cd25695 | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 91 | struct mgcp_request { |
| 92 | char *name; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 93 | struct msgb *(*handle_request) (struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | 26143c8 | 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 | cd25695 | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 106 | |
Holger Hans Peter Freyther | 017738d | 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 | cd25695 | 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 | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 112 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 113 | { |
| 114 | int i; |
| 115 | |
| 116 | /* use the call id */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 117 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 118 | |
| 119 | /* handle wrap around */ |
Holger Hans Peter Freyther | 6f38c06 | 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 | 26143c8 | 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 | ab56ce1 | 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 | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 127 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 128 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 129 | return cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 130 | } |
| 131 | |
Holger Hans Peter Freyther | 26143c8 | 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 | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 142 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 143 | |
| 144 | /* SPEC extension */ |
| 145 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 146 | }; |
| 147 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 148 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 149 | { |
Holger Hans Peter Freyther | ad4e339 | 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 | cd25695 | 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 | 3ba9cce | 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 | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 171 | const char *trans, const char *param, |
| 172 | const char *sdp) |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 173 | { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 174 | int len; |
Holger Hans Peter Freyther | ad4e339 | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 180 | |
Holger Hans Peter Freyther | 8fc6d08 | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 187 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 188 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 189 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | cd25695 | 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 | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 205 | return res; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 206 | } |
| 207 | |
Holger Hans Peter Freyther | 3ba9cce | 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 | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 210 | const char *trans, const char *param) |
| 211 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 212 | return create_resp(endp, code, " OK", msg, trans, param, NULL); |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 213 | } |
| 214 | |
Holger Hans Peter Freyther | 3ba9cce | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 217 | { |
Holger Hans Peter Freyther | 3ba9cce | 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 | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 219 | } |
| 220 | |
Holger Hans Peter Freyther | 3ba9cce | 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 | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 223 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 224 | return create_resp(endp, code, " FAIL", msg, trans, NULL, NULL); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 225 | } |
| 226 | |
Holger Hans Peter Freyther | 60d02a3 | 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 | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 229 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 230 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 231 | const char *fmtp_extra = endp->bts_end.fmtp_extra; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 232 | char sdp_record[4096]; |
| 233 | |
| 234 | if (!addr) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 235 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 236 | |
| 237 | snprintf(sdp_record, sizeof(sdp_record) - 1, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 238 | "I: %u\n\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 239 | "v=0\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 240 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 241 | "c=IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 242 | "t=0 0\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 243 | "m=audio %d RTP/AVP %d\r\n" |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 244 | "a=rtpmap:%d %s\r\n" |
| 245 | "%s%s", |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 246 | endp->ci, endp->ci, addr, addr, |
| 247 | endp->net_end.local_port, endp->bts_end.payload_type, |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 248 | endp->bts_end.payload_type, endp->tcfg->audio_name, |
| 249 | fmtp_extra ? fmtp_extra : "", fmtp_extra ? "\r\n" : ""); |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 250 | return create_resp(endp, 200, " OK", msg, trans_id, NULL, sdp_record); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 251 | } |
| 252 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 253 | /* |
| 254 | * handle incoming messages: |
| 255 | * - this can be a command (four letters, space, transaction id) |
| 256 | * - or a response (three numbers, space, transaction id) |
| 257 | */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 258 | struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 259 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 260 | struct mgcp_parse_data pdata; |
| 261 | int i, code, handled = 0; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 262 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 263 | char *data; |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 264 | unsigned char *tail = msg->l2h + msgb_l2len(msg); /* char after l2 data */ |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 265 | |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 266 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | bed02ba | 2012-12-07 16:46:19 +0100 | [diff] [blame] | 267 | LOGP(DMGCP, LOGL_ERROR, "msg too short: %d\n", msg->len); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 268 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 269 | } |
| 270 | |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 271 | /* Ensure that the msg->l2h is NUL terminated. */ |
| 272 | if (tail[-1] == '\0') |
| 273 | /* nothing to do */; |
| 274 | else if (msgb_tailroom(msg) > 0) |
| 275 | tail[0] = '\0'; |
| 276 | else if (tail[-1] == '\r' || tail[-1] == '\n') |
| 277 | tail[-1] = '\0'; |
| 278 | else { |
| 279 | LOGP(DMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| 280 | "Length: %d, Buffer size: %d\n", |
| 281 | msgb_l2len(msg), msg->data_len); |
| 282 | return NULL; |
| 283 | } |
| 284 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 285 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 286 | if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) { |
Holger Hans Peter Freyther | 40faed8 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 287 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 288 | return NULL; |
| 289 | } |
| 290 | |
| 291 | msg->l3h = &msg->l2h[4]; |
| 292 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 293 | |
| 294 | /* |
| 295 | * Check for a duplicate message and respond. |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 296 | */ |
| 297 | memset(&pdata, 0, sizeof(pdata)); |
| 298 | pdata.cfg = cfg; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 299 | data = strline_r((char *) msg->l3h, &pdata.save); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 300 | pdata.found = mgcp_analyze_header(&pdata, data); |
| 301 | if (pdata.endp && pdata.trans |
| 302 | && pdata.endp->last_trans |
| 303 | && strcmp(pdata.endp->last_trans, pdata.trans) == 0) { |
| 304 | return do_retransmission(pdata.endp); |
| 305 | } |
| 306 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 307 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) { |
| 308 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
| 309 | handled = 1; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 310 | resp = mgcp_requests[i].handle_request(&pdata); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 311 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 312 | } |
| 313 | } |
| 314 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 315 | if (!handled) |
| 316 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
| 317 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 318 | return resp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 319 | } |
| 320 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 321 | /** |
| 322 | * We have a null terminated string with the endpoint name here. We only |
| 323 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 324 | * seen on the trunk side. |
| 325 | */ |
| 326 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 327 | const char *mgcp) |
| 328 | { |
| 329 | char *rest = NULL; |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 330 | struct mgcp_trunk_config *tcfg; |
| 331 | int trunk, endp; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 332 | |
| 333 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 334 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 335 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 336 | return NULL; |
| 337 | } |
| 338 | |
| 339 | endp = strtoul(rest + 1, &rest, 10); |
| 340 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 341 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 342 | return NULL; |
| 343 | } |
| 344 | |
| 345 | /* signalling is on timeslot 1 */ |
| 346 | if (endp == 1) |
| 347 | return NULL; |
| 348 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 349 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 350 | if (!tcfg) { |
| 351 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 352 | return NULL; |
| 353 | } |
| 354 | |
| 355 | if (!tcfg->endpoints) { |
| 356 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 357 | return NULL; |
| 358 | } |
| 359 | |
| 360 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 361 | LOGP(DMGCP, LOGL_ERROR, "Failed to find endpoint '%s'\n", mgcp); |
Holger Hans Peter Freyther | 0f1786f | 2011-01-07 11:36:54 +0100 | [diff] [blame] | 362 | return NULL; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 363 | } |
| 364 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 365 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 366 | } |
| 367 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 368 | static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg, const char *mgcp) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 369 | { |
| 370 | char *endptr = NULL; |
| 371 | unsigned int gw = INT_MAX; |
| 372 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 373 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 374 | return find_e1_endpoint(cfg, mgcp); |
| 375 | } else { |
| 376 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 377 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 378 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 379 | } |
| 380 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 381 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 382 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 383 | } |
| 384 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 385 | /** |
| 386 | * @returns 0 when the status line was complete and transaction_id and |
| 387 | * endp out parameters are set. |
| 388 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 389 | static int mgcp_analyze_header(struct mgcp_parse_data *pdata, char *data) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 390 | { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 391 | int i = 0; |
Holger Hans Peter Freyther | 0b6dca7 | 2013-07-03 10:23:35 +0200 | [diff] [blame] | 392 | char *elem, *save = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 393 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 394 | pdata->trans = "000000"; |
Holger Hans Peter Freyther | 275c044 | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 395 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 396 | for (elem = strtok_r(data, " ", &save); elem; |
| 397 | elem = strtok_r(NULL, " ", &save)) { |
| 398 | switch (i) { |
| 399 | case 0: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 400 | pdata->trans = elem; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 401 | break; |
| 402 | case 1: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 403 | pdata->endp = find_endpoint(pdata->cfg, elem); |
| 404 | if (!pdata->endp) { |
| 405 | LOGP(DMGCP, LOGL_ERROR, |
| 406 | "Unable to find Endpoint `%s'\n", elem); |
| 407 | return -1; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 408 | } |
| 409 | break; |
| 410 | case 2: |
| 411 | if (strcmp("MGCP", elem)) { |
| 412 | LOGP(DMGCP, LOGL_ERROR, |
| 413 | "MGCP header parsing error\n"); |
| 414 | return -1; |
| 415 | } |
| 416 | break; |
| 417 | case 3: |
| 418 | if (strcmp("1.0", elem)) { |
| 419 | LOGP(DMGCP, LOGL_ERROR, "MGCP version `%s' " |
| 420 | "not supported\n", elem); |
| 421 | return -1; |
| 422 | } |
| 423 | break; |
| 424 | } |
| 425 | i++; |
| 426 | } |
| 427 | |
| 428 | if (i != 4) { |
| 429 | LOGP(DMGCP, LOGL_ERROR, "MGCP status line too short.\n"); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 430 | pdata->trans = "000000"; |
| 431 | pdata->endp = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 432 | return -1; |
| 433 | } |
| 434 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 435 | return 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 439 | const char *callid) |
| 440 | { |
| 441 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 442 | LOGP(DMGCP, LOGL_ERROR, "CallIDs does not match on 0x%x. '%s' != '%s'\n", |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 443 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 444 | return -1; |
| 445 | } |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 451 | const char *_ci) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 452 | { |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 453 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 454 | |
| 455 | if (ci != endp->ci) { |
| 456 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 457 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 458 | return -1; |
| 459 | } |
| 460 | |
| 461 | return 0; |
| 462 | } |
| 463 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 464 | static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 465 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 466 | if (p->found != 0) |
| 467 | return create_err_response(NULL, 500, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 468 | else |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 469 | return create_ok_response(p->endp, 200, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 470 | } |
| 471 | |
Holger Hans Peter Freyther | dfd61a3 | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 472 | static int parse_conn_mode(const char *msg, int *conn_mode) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 473 | { |
| 474 | int ret = 0; |
| 475 | if (strcmp(msg, "recvonly") == 0) |
| 476 | *conn_mode = MGCP_CONN_RECV_ONLY; |
| 477 | else if (strcmp(msg, "sendrecv") == 0) |
| 478 | *conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | 0bfcbee | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 479 | else if (strcmp(msg, "sendonly") == 0) |
| 480 | *conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 0bdf20d | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 481 | else if (strcmp(msg, "loopback") == 0) |
| 482 | *conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 483 | else { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 484 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 485 | ret = -1; |
| 486 | } |
| 487 | |
| 488 | return ret; |
| 489 | } |
| 490 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 491 | static int allocate_port(struct mgcp_endpoint *endp, struct mgcp_rtp_end *end, |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 492 | struct mgcp_port_range *range, |
| 493 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 494 | { |
| 495 | int i; |
| 496 | |
| 497 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 498 | end->local_alloc = PORT_ALLOC_STATIC; |
| 499 | return 0; |
| 500 | } |
| 501 | |
| 502 | /* attempt to find a port */ |
| 503 | for (i = 0; i < 200; ++i) { |
| 504 | int rc; |
| 505 | |
| 506 | if (range->last_port >= range->range_end) |
| 507 | range->last_port = range->range_start; |
| 508 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 509 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 510 | |
| 511 | range->last_port += 2; |
| 512 | if (rc == 0) { |
| 513 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | } |
| 518 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 519 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 520 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 521 | return -1; |
| 522 | } |
| 523 | |
| 524 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 525 | { |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 526 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 527 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 528 | return -1; |
| 529 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 530 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 531 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 532 | mgcp_rtp_end_reset(&endp->net_end); |
| 533 | return -1; |
| 534 | } |
| 535 | |
Holger Hans Peter Freyther | 1b8eaf4 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 536 | if (endp->cfg->transcoder_ip && endp->tcfg->trunk_type == MGCP_TRUNK_VIRTUAL) { |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 537 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 538 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 539 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 540 | mgcp_rtp_end_reset(&endp->net_end); |
| 541 | mgcp_rtp_end_reset(&endp->bts_end); |
| 542 | return -1; |
| 543 | } |
| 544 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 545 | if (allocate_port(endp, &endp->trans_bts, |
| 546 | &endp->cfg->transcoder_ports, |
| 547 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 548 | mgcp_rtp_end_reset(&endp->net_end); |
| 549 | mgcp_rtp_end_reset(&endp->bts_end); |
| 550 | mgcp_rtp_end_reset(&endp->trans_net); |
| 551 | return -1; |
| 552 | } |
| 553 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 554 | /* remember that we have set up transcoding */ |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 555 | endp->type = MGCP_RTP_TRANSCODED; |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 556 | } |
| 557 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 558 | return 0; |
| 559 | } |
| 560 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 561 | static int parse_sdp_data(struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p) |
| 562 | { |
| 563 | char *line; |
| 564 | int found_media = 0; |
| 565 | |
| 566 | for_each_line(line, p->save) { |
| 567 | switch (line[0]) { |
| 568 | case 'a': |
| 569 | case 'o': |
| 570 | case 's': |
| 571 | case 't': |
| 572 | case 'v': |
| 573 | /* skip these SDP attributes */ |
| 574 | break; |
| 575 | case 'm': { |
| 576 | int port; |
| 577 | int payload; |
| 578 | |
| 579 | if (sscanf(line, "m=audio %d RTP/AVP %d", |
| 580 | &port, &payload) == 2) { |
| 581 | rtp->rtp_port = htons(port); |
| 582 | rtp->rtcp_port = htons(port + 1); |
| 583 | rtp->payload_type = payload; |
| 584 | found_media = 1; |
| 585 | } |
| 586 | break; |
| 587 | } |
| 588 | case 'c': { |
| 589 | char ipv4[16]; |
| 590 | |
| 591 | if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) { |
| 592 | inet_aton(ipv4, &rtp->addr); |
| 593 | } |
| 594 | break; |
| 595 | } |
| 596 | default: |
| 597 | if (p->endp) |
| 598 | LOGP(DMGCP, LOGL_NOTICE, |
| 599 | "Unhandled SDP option: '%c'/%d on 0x%x\n", |
| 600 | line[0], line[0], ENDPOINT_NUMBER(p->endp)); |
| 601 | else |
| 602 | LOGP(DMGCP, LOGL_NOTICE, |
| 603 | "Unhandled SDP option: '%c'/%d\n", |
| 604 | line[0], line[0]); |
| 605 | break; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | if (found_media) |
| 610 | LOGP(DMGCP, LOGL_NOTICE, |
| 611 | "Got media info via SDP: port %d, payload %d, addr %s\n", |
| 612 | ntohs(rtp->rtp_port), rtp->payload_type, inet_ntoa(rtp->addr)); |
| 613 | |
| 614 | return found_media; |
| 615 | } |
| 616 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 617 | static struct msgb *handle_create_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 618 | { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 619 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 620 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 621 | int error_code = 400; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 622 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 623 | const char *local_options = NULL; |
| 624 | const char *callid = NULL; |
| 625 | const char *mode = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 626 | char *line; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 627 | int have_sdp = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 628 | |
| 629 | if (p->found != 0) |
| 630 | return create_err_response(NULL, 510, "CRCX", p->trans); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 631 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 632 | /* parse CallID C: and LocalParameters L: */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 633 | for_each_line(line, p->save) { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 634 | switch (line[0]) { |
| 635 | case 'L': |
| 636 | local_options = (const char *) line + 3; |
| 637 | break; |
| 638 | case 'C': |
| 639 | callid = (const char *) line + 3; |
| 640 | break; |
| 641 | case 'M': |
| 642 | mode = (const char *) line + 3; |
| 643 | break; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 644 | case '\0': |
| 645 | have_sdp = 1; |
| 646 | goto mgcp_header_done; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 647 | default: |
| 648 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 649 | *line, *line, ENDPOINT_NUMBER(endp)); |
| 650 | break; |
| 651 | } |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 652 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 653 | |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 654 | mgcp_header_done: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 655 | tcfg = p->endp->tcfg; |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 656 | |
| 657 | /* Check required data */ |
| 658 | if (!callid || !mode) { |
| 659 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 660 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 661 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 662 | } |
| 663 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 664 | if (endp->allocated) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 665 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 666 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 667 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 5c132ee | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 668 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 669 | if (p->cfg->realloc_cb) |
| 670 | p->cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 671 | } else { |
| 672 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 673 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 674 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 675 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 676 | } |
| 677 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 678 | /* copy some parameters */ |
| 679 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 680 | |
| 681 | if (local_options) |
| 682 | endp->local_options = talloc_strdup(tcfg->endpoints, local_options); |
| 683 | |
| 684 | if (parse_conn_mode(mode, &endp->conn_mode) != 0) { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 685 | error_code = 517; |
| 686 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 687 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 688 | |
| 689 | /* initialize */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 690 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 691 | |
| 692 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 693 | memset(&endp->net_end.addr, 0, sizeof(endp->net_end.addr)); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 694 | |
| 695 | /* bind to the port now */ |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 696 | if (allocate_ports(endp) != 0) |
| 697 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 698 | |
| 699 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 700 | endp->ci = generate_call_id(p->cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 701 | if (endp->ci == CI_UNUSED) |
| 702 | goto error2; |
| 703 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 704 | endp->allocated = 1; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 705 | |
| 706 | /* set up RTP media parameters */ |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 707 | endp->bts_end.payload_type = tcfg->audio_payload; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 708 | endp->bts_end.fmtp_extra = talloc_strdup(tcfg->endpoints, |
| 709 | tcfg->audio_fmtp_extra); |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 710 | if (have_sdp) |
| 711 | parse_sdp_data(&endp->net_end, p); |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 712 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 713 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 714 | if (p->cfg->policy_cb) { |
| 715 | int rc; |
| 716 | rc = p->cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), |
| 717 | MGCP_ENDP_CRCX, p->trans); |
| 718 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 719 | case MGCP_POLICY_REJECT: |
| 720 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 721 | ENDPOINT_NUMBER(endp)); |
| 722 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 723 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 724 | break; |
| 725 | case MGCP_POLICY_DEFER: |
| 726 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 727 | create_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 728 | return NULL; |
| 729 | break; |
| 730 | case MGCP_POLICY_CONT: |
| 731 | /* just continue */ |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 736 | LOGP(DMGCP, LOGL_DEBUG, "Creating endpoint on: 0x%x CI: %u port: %u/%u\n", |
Holger Hans Peter Freyther | 148c5d3 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 737 | ENDPOINT_NUMBER(endp), endp->ci, |
| 738 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 739 | if (p->cfg->change_cb) |
| 740 | p->cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 25374bd | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 741 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 742 | create_transcoder(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 743 | return create_response_with_sdp(endp, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 744 | error2: |
Holger Hans Peter Freyther | 411764b | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 745 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 746 | LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 747 | return create_err_response(endp, error_code, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 748 | } |
| 749 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 750 | static struct msgb *handle_modify_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 751 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 752 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 753 | int error_code = 500; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 754 | int silent = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 755 | char *line; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 756 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 757 | if (p->found != 0) |
| 758 | return create_err_response(NULL, 510, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 759 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 760 | if (endp->ci == CI_UNUSED) { |
| 761 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 762 | "holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 763 | return create_err_response(endp, 400, "MDCX", p->trans); |
| 764 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 765 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 766 | for_each_line(line, p->save) { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 767 | switch (line[0]) { |
| 768 | case 'C': { |
| 769 | if (verify_call_id(endp, line + 3) != 0) |
| 770 | goto error3; |
| 771 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 772 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 773 | case 'I': { |
| 774 | if (verify_ci(endp, line + 3) != 0) |
| 775 | goto error3; |
| 776 | break; |
| 777 | } |
| 778 | case 'L': |
| 779 | /* skip */ |
| 780 | break; |
| 781 | case 'M': |
| 782 | if (parse_conn_mode(line + 3, &endp->conn_mode) != 0) { |
| 783 | error_code = 517; |
| 784 | goto error3; |
| 785 | } |
| 786 | endp->orig_mode = endp->conn_mode; |
| 787 | break; |
| 788 | case 'Z': |
| 789 | silent = strcmp("noanswer", line + 3) == 0; |
| 790 | break; |
| 791 | case '\0': |
| 792 | /* SDP file begins */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 793 | parse_sdp_data(&endp->net_end, p); |
| 794 | /* This will exhaust p->save, so the loop will |
| 795 | * terminate next time. |
| 796 | */ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 797 | break; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 798 | default: |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 799 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled MGCP option: '%c'/%d on 0x%x\n", |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 800 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 801 | break; |
| 802 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 803 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 804 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 805 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 806 | if (p->cfg->policy_cb) { |
| 807 | int rc; |
| 808 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 809 | MGCP_ENDP_MDCX, p->trans); |
| 810 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 811 | case MGCP_POLICY_REJECT: |
| 812 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 813 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 814 | if (silent) |
| 815 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 816 | return create_err_response(endp, 400, "MDCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 817 | break; |
| 818 | case MGCP_POLICY_DEFER: |
| 819 | /* stop processing */ |
| 820 | return NULL; |
| 821 | break; |
| 822 | case MGCP_POLICY_CONT: |
| 823 | /* just continue */ |
| 824 | break; |
| 825 | } |
| 826 | } |
| 827 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 828 | /* modify */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 829 | LOGP(DMGCP, LOGL_DEBUG, "Modified endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 830 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 831 | if (p->cfg->change_cb) |
| 832 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 833 | if (silent) |
| 834 | goto out_silent; |
| 835 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 836 | return create_response_with_sdp(endp, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 837 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 838 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 839 | return create_err_response(endp, error_code, "MDCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 840 | |
| 841 | |
| 842 | out_silent: |
| 843 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 844 | } |
| 845 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 846 | static struct msgb *handle_delete_con(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 847 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 848 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 849 | int error_code = 400; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 850 | int silent = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 851 | char *line; |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 852 | char stats[1048]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 853 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 854 | if (p->found != 0) |
| 855 | return create_err_response(NULL, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 856 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 857 | if (!p->endp->allocated) { |
| 858 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", |
| 859 | ENDPOINT_NUMBER(endp)); |
| 860 | return create_err_response(endp, 400, "DLCX", p->trans); |
| 861 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 862 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 863 | for_each_line(line, p->save) { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 864 | switch (line[0]) { |
| 865 | case 'C': |
| 866 | if (verify_call_id(endp, line + 3) != 0) |
| 867 | goto error3; |
| 868 | break; |
| 869 | case 'I': |
| 870 | if (verify_ci(endp, line + 3) != 0) |
| 871 | goto error3; |
| 872 | break; |
| 873 | case 'Z': |
| 874 | silent = strcmp("noanswer", line + 3) == 0; |
| 875 | break; |
| 876 | default: |
| 877 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 878 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 879 | break; |
| 880 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 881 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 882 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 883 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 884 | if (p->cfg->policy_cb) { |
| 885 | int rc; |
| 886 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 887 | MGCP_ENDP_DLCX, p->trans); |
| 888 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 889 | case MGCP_POLICY_REJECT: |
| 890 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 891 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 892 | if (silent) |
| 893 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 894 | return create_err_response(endp, 400, "DLCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 895 | break; |
| 896 | case MGCP_POLICY_DEFER: |
| 897 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 898 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 899 | return NULL; |
| 900 | break; |
| 901 | case MGCP_POLICY_CONT: |
| 902 | /* just continue */ |
| 903 | break; |
| 904 | } |
| 905 | } |
| 906 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 907 | /* free the connection */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 908 | LOGP(DMGCP, LOGL_DEBUG, "Deleted endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 909 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 910 | |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 911 | /* save the statistics of the current call */ |
| 912 | mgcp_format_stats(endp, stats, sizeof(stats)); |
| 913 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 914 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 915 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 916 | if (p->cfg->change_cb) |
| 917 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 918 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 919 | if (silent) |
| 920 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 921 | return create_ok_resp_with_param(endp, 250, "DLCX", p->trans, stats); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 922 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 923 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 924 | return create_err_response(endp, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 925 | |
| 926 | out_silent: |
| 927 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 928 | } |
| 929 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 930 | static struct msgb *handle_rsip(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 931 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 932 | if (p->found != 0) { |
Holger Hans Peter Freyther | 26bd848 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 933 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 934 | return NULL; |
| 935 | } |
| 936 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 937 | if (p->cfg->reset_cb) |
| 938 | p->cfg->reset_cb(p->endp->tcfg); |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 939 | return NULL; |
| 940 | } |
| 941 | |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 942 | static char extract_tone(const char *line) |
| 943 | { |
| 944 | const char *str = strstr(line, "D/"); |
| 945 | if (!str) |
| 946 | return CHAR_MAX; |
| 947 | |
| 948 | return str[2]; |
| 949 | } |
| 950 | |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 951 | /* |
| 952 | * This can request like DTMF detection and forward, fax detection... it |
| 953 | * can also request when the notification should be send and such. We don't |
| 954 | * do this right now. |
| 955 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 956 | static struct msgb *handle_noti_req(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 957 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 958 | int res = 0; |
| 959 | char *line; |
Holger Hans Peter Freyther | a229748 | 2013-05-21 17:04:35 +0200 | [diff] [blame] | 960 | char tone = CHAR_MAX; |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 961 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 962 | if (p->found != 0) |
| 963 | return create_err_response(NULL, 400, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 964 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 965 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 966 | switch (line[0]) { |
| 967 | case 'S': |
| 968 | tone = extract_tone(line); |
| 969 | break; |
| 970 | } |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 971 | } |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 972 | |
| 973 | /* we didn't see a signal request with a tone */ |
| 974 | if (tone == CHAR_MAX) |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 975 | return create_ok_response(p->endp, 200, "RQNT", p->trans); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 976 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 977 | if (p->cfg->rqnt_cb) |
| 978 | res = p->cfg->rqnt_cb(p->endp, tone); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 979 | |
| 980 | return res == 0 ? |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 981 | create_ok_response(p->endp, 200, "RQNT", p->trans) : |
| 982 | create_err_response(p->endp, res, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 983 | } |
| 984 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 985 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 986 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 987 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 988 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 989 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 990 | if (!cfg) { |
| 991 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 992 | return NULL; |
| 993 | } |
| 994 | |
| 995 | cfg->source_port = 2427; |
| 996 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 997 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 998 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 2ea9118 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 999 | |
| 1000 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 1001 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1002 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1003 | /* default trunk handling */ |
| 1004 | cfg->trunk.cfg = cfg; |
| 1005 | cfg->trunk.trunk_nr = 0; |
| 1006 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 1007 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1008 | cfg->trunk.audio_payload = 126; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1009 | cfg->trunk.omit_rtcp = 0; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1010 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1011 | INIT_LLIST_HEAD(&cfg->trunks); |
| 1012 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1013 | return cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1014 | } |
| 1015 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1016 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 1017 | { |
| 1018 | struct mgcp_trunk_config *trunk; |
| 1019 | |
| 1020 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 1021 | if (!trunk) { |
| 1022 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 1023 | return NULL; |
| 1024 | } |
| 1025 | |
| 1026 | trunk->cfg = cfg; |
| 1027 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 1028 | trunk->trunk_nr = nr; |
| 1029 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1030 | trunk->audio_payload = 126; |
| 1031 | trunk->number_endpoints = 33; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1032 | trunk->omit_rtcp = 0; |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1033 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 1034 | return trunk; |
| 1035 | } |
| 1036 | |
| 1037 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 1038 | { |
| 1039 | struct mgcp_trunk_config *trunk; |
| 1040 | |
| 1041 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 1042 | if (trunk->trunk_nr == index) |
| 1043 | return trunk; |
| 1044 | |
| 1045 | return NULL; |
| 1046 | } |
| 1047 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1048 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 1049 | { |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1050 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1051 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1052 | end->local_port = 0; |
| 1053 | } |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1054 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1055 | end->packets = 0; |
Holger Hans Peter Freyther | 3e45610 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 1056 | end->octets = 0; |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1057 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1058 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1059 | end->payload_type = -1; |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1060 | end->local_alloc = -1; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 1061 | talloc_free(end->fmtp_extra); |
| 1062 | end->fmtp_extra = NULL; |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 1063 | |
| 1064 | /* Set default values */ |
| 1065 | end->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM; |
| 1066 | end->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN; |
| 1067 | end->frames_per_packet = DEFAULT_RTP_AUDIO_FRAMES_PER_PACKET; |
| 1068 | end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1069 | } |
| 1070 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1071 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 1072 | { |
| 1073 | mgcp_rtp_end_reset(end); |
| 1074 | end->rtp.fd = -1; |
| 1075 | end->rtcp.fd = -1; |
| 1076 | } |
| 1077 | |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1078 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1079 | { |
| 1080 | int i; |
| 1081 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1082 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1083 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1084 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1085 | tcfg->number_endpoints, "endpoints"); |
| 1086 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1087 | return -1; |
| 1088 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1089 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 1090 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1091 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1092 | tcfg->endpoints[i].tcfg = tcfg; |
| 1093 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 1094 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 1095 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 1096 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1097 | } |
| 1098 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1099 | return 0; |
| 1100 | } |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1101 | |
| 1102 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 1103 | { |
Holger Hans Peter Freyther | 62d3bb7 | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 1104 | LOGP(DMGCP, LOGL_DEBUG, "Deleting endpoint on: 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | fd93fc0 | 2010-08-03 15:01:43 +0000 | [diff] [blame] | 1105 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 1106 | endp->allocated = 0; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1107 | |
Holger Hans Peter Freyther | e9564b2 | 2012-12-07 11:52:16 +0100 | [diff] [blame] | 1108 | talloc_free(endp->callid); |
| 1109 | endp->callid = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1110 | |
Holger Hans Peter Freyther | e9564b2 | 2012-12-07 11:52:16 +0100 | [diff] [blame] | 1111 | talloc_free(endp->local_options); |
| 1112 | endp->local_options = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1113 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1114 | mgcp_rtp_end_reset(&endp->bts_end); |
| 1115 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1116 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1117 | mgcp_rtp_end_reset(&endp->trans_bts); |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1118 | endp->type = MGCP_RTP_DEFAULT; |
Holger Hans Peter Freyther | e758d95 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 1119 | |
Holger Hans Peter Freyther | 84ba528 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 1120 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 1121 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | b33ded1 | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 1122 | |
| 1123 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 73aa514 | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 1124 | endp->allow_patch = 0; |
Holger Hans Peter Freyther | 8fdb95e | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 1125 | |
| 1126 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1127 | } |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1128 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1129 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 1130 | { |
| 1131 | struct sockaddr_in addr; |
| 1132 | |
| 1133 | memset(&addr, 0, sizeof(addr)); |
| 1134 | addr.sin_family = AF_INET; |
| 1135 | addr.sin_addr = cfg->transcoder_in; |
| 1136 | addr.sin_port = htons(2427); |
| 1137 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 1138 | (struct sockaddr *) &addr, sizeof(addr)); |
| 1139 | } |
| 1140 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1141 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 1142 | const char *msg, const char *mode) |
| 1143 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1144 | char buf[2096]; |
| 1145 | int len; |
| 1146 | |
| 1147 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 1148 | len = snprintf(buf, sizeof(buf), |
| 1149 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 1150 | "C: 4256\r\n" |
| 1151 | "M: %s\r\n" |
| 1152 | "\r\n" |
| 1153 | "c=IN IP4 %s\r\n" |
| 1154 | "m=audio %d RTP/AVP %d\r\n" |
| 1155 | "a=rtpmap:%d %s\r\n", |
| 1156 | msg, endpoint, mode, endp->cfg->source_addr, |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1157 | port, endp->tcfg->audio_payload, |
| 1158 | endp->tcfg->audio_payload, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1159 | |
| 1160 | if (len < 0) |
| 1161 | return; |
| 1162 | |
| 1163 | buf[sizeof(buf) - 1] = '\0'; |
| 1164 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1165 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1166 | } |
| 1167 | |
| 1168 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1169 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1170 | char buf[2096]; |
| 1171 | int len; |
| 1172 | |
| 1173 | len = snprintf(buf, sizeof(buf), |
| 1174 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1175 | "C: 4256\r\n" |
| 1176 | , endpoint); |
| 1177 | |
| 1178 | if (len < 0) |
| 1179 | return; |
| 1180 | |
| 1181 | buf[sizeof(buf) - 1] = '\0'; |
| 1182 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1183 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1184 | } |
| 1185 | |
Harald Welte | ba4f8b2 | 2012-01-27 00:41:39 +0100 | [diff] [blame] | 1186 | static int send_agent(struct mgcp_config *cfg, const char *buf, int len) |
| 1187 | { |
| 1188 | return write(cfg->gw_fd.bfd.fd, buf, len); |
| 1189 | } |
| 1190 | |
| 1191 | int mgcp_send_reset_all(struct mgcp_config *cfg) |
| 1192 | { |
| 1193 | static const char mgcp_reset[] = { |
| 1194 | "RSIP 1 *@mgw MGCP 1.0\r\n" |
| 1195 | }; |
| 1196 | |
| 1197 | return send_agent(cfg, mgcp_reset, sizeof mgcp_reset -1); |
| 1198 | } |
| 1199 | |
| 1200 | int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint) |
| 1201 | { |
| 1202 | char buf[128]; |
| 1203 | int len; |
| 1204 | |
| 1205 | len = snprintf(buf, sizeof(buf), |
| 1206 | "RSIP 39 %x@mgw MGCP 1.0\r\n" |
| 1207 | , endpoint); |
| 1208 | if (len < 0) |
| 1209 | return len; |
| 1210 | |
| 1211 | buf[sizeof(buf) - 1] = '\0'; |
| 1212 | |
| 1213 | return send_agent(endp->cfg, buf, len); |
| 1214 | } |
| 1215 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1216 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1217 | { |
| 1218 | int port; |
| 1219 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1220 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1221 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1222 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1223 | return; |
| 1224 | |
Holger Hans Peter Freyther | c9e3bc6 | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1225 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1226 | send_msg(endp, in_endp, endp->trans_bts.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1227 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1228 | send_msg(endp, out_endp, endp->trans_net.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1229 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1230 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1231 | endp->trans_bts.rtp_port = htons(port); |
| 1232 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1233 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1234 | port = rtp_calculate_port(out_endp, endp->cfg->transcoder_remote_base); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1235 | endp->trans_net.rtp_port = htons(port); |
| 1236 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1237 | } |
| 1238 | |
| 1239 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1240 | { |
| 1241 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1242 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1243 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1244 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1245 | return; |
| 1246 | |
| 1247 | send_dlcx(endp, in_endp); |
| 1248 | send_dlcx(endp, out_endp); |
| 1249 | } |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1250 | |
| 1251 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1252 | { |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1253 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | bafc987 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1254 | return 0; |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1255 | |
| 1256 | static const char mgcp_reset[] = { |
| 1257 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1258 | }; |
| 1259 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1260 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1261 | } |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1262 | |
| 1263 | void mgcp_format_stats(struct mgcp_endpoint *endp, char *msg, size_t size) |
| 1264 | { |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1265 | uint32_t expected, jitter; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1266 | int ploss; |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1267 | int nchars; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1268 | mgcp_state_calc_loss(&endp->net_state, &endp->net_end, |
| 1269 | &expected, &ploss); |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1270 | jitter = mgcp_state_calc_jitter(&endp->net_state); |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1271 | |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1272 | nchars = snprintf(msg, size, |
| 1273 | "\r\nP: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1274 | endp->bts_end.packets, endp->bts_end.octets, |
| 1275 | endp->net_end.packets, endp->net_end.octets, |
| 1276 | ploss, jitter); |
| 1277 | if (nchars < 0 || nchars >= size) |
| 1278 | goto truncate; |
| 1279 | |
| 1280 | msg += nchars; |
| 1281 | size -= nchars; |
| 1282 | |
| 1283 | /* Error Counter */ |
| 1284 | snprintf(msg, size, |
| 1285 | "\r\nX-Osmo-CP: EC TIS=%u, TOS=%u, TIR=%u, TOR=%u", |
| 1286 | endp->net_state.in_stream.err_ts_counter, |
| 1287 | endp->net_state.out_stream.err_ts_counter, |
| 1288 | endp->bts_state.in_stream.err_ts_counter, |
| 1289 | endp->bts_state.out_stream.err_ts_counter); |
| 1290 | truncate: |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1291 | msg[size - 1] = '\0'; |
| 1292 | } |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1293 | |
| 1294 | int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os, |
| 1295 | uint32_t *pr, uint32_t *_or, int *loss, uint32_t *jitter) |
| 1296 | { |
| 1297 | char *line, *save; |
| 1298 | int rc; |
| 1299 | |
| 1300 | /* initialize with bad values */ |
| 1301 | *ps = *os = *pr = *_or = *jitter = UINT_MAX; |
| 1302 | *loss = INT_MAX; |
| 1303 | |
| 1304 | |
| 1305 | line = strtok_r((char *) msg->l2h, "\r\n", &save); |
| 1306 | if (!line) |
| 1307 | return -1; |
| 1308 | |
| 1309 | /* this can only parse the message that is created above... */ |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 1310 | for_each_non_empty_line(line, save) { |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1311 | switch (line[0]) { |
| 1312 | case 'P': |
| 1313 | rc = sscanf(line, "P: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1314 | ps, os, pr, _or, loss, jitter); |
| 1315 | return rc == 6 ? 0 : -1; |
| 1316 | } |
| 1317 | } |
| 1318 | |
| 1319 | return -1; |
| 1320 | } |