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> |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 31 | #include <errno.h> |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 32 | |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 33 | #include <osmocom/core/msgb.h> |
| 34 | #include <osmocom/core/talloc.h> |
| 35 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 6d419f9 | 2011-02-28 22:06:47 +0100 | [diff] [blame] | 36 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 38 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 39 | |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 40 | #define for_each_non_empty_line(line, save) \ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 41 | for (line = strtok_r(NULL, "\r\n", &save); line;\ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 42 | line = strtok_r(NULL, "\r\n", &save)) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 43 | |
Jacob Erlbeck | e7060c4 | 2013-11-29 13:43:44 +0100 | [diff] [blame] | 44 | #define for_each_line(line, save) \ |
| 45 | for (line = strline_r(NULL, &save); line;\ |
| 46 | line = strline_r(NULL, &save)) |
| 47 | |
| 48 | char *strline_r(char *str, char **saveptr) |
| 49 | { |
| 50 | char *result; |
| 51 | |
| 52 | if (str) |
| 53 | *saveptr = str; |
| 54 | |
| 55 | result = *saveptr; |
| 56 | |
| 57 | if (*saveptr != NULL) { |
| 58 | *saveptr = strpbrk(*saveptr, "\r\n"); |
| 59 | |
| 60 | if (*saveptr != NULL) { |
| 61 | char *eos = *saveptr; |
| 62 | |
| 63 | if ((*saveptr)[0] == '\r' && (*saveptr)[1] == '\n') |
| 64 | (*saveptr)++; |
| 65 | (*saveptr)++; |
| 66 | if ((*saveptr)[0] == '\0') |
| 67 | *saveptr = NULL; |
| 68 | |
| 69 | *eos = '\0'; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | return result; |
| 74 | } |
| 75 | |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 76 | /* Assume audio frame length of 20ms */ |
| 77 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20 |
| 78 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000 |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 79 | #define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20 |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 80 | #define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000 |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 81 | #define DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS 1 |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 82 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 83 | 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] | 84 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 85 | struct mgcp_parse_data { |
| 86 | struct mgcp_config *cfg; |
| 87 | struct mgcp_endpoint *endp; |
| 88 | char *trans; |
| 89 | char *save; |
| 90 | int found; |
| 91 | }; |
| 92 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 93 | struct mgcp_request { |
| 94 | char *name; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 95 | struct msgb *(*handle_request) (struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 96 | char *debug_name; |
| 97 | }; |
| 98 | |
| 99 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 100 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 101 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 102 | static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *data); |
| 103 | static struct msgb *handle_create_con(struct mgcp_parse_data *data); |
| 104 | static struct msgb *handle_delete_con(struct mgcp_parse_data *data); |
| 105 | static struct msgb *handle_modify_con(struct mgcp_parse_data *data); |
| 106 | static struct msgb *handle_rsip(struct mgcp_parse_data *data); |
| 107 | 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] | 108 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 109 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 110 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 111 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 112 | static void setup_rtp_processing(struct mgcp_endpoint *endp); |
| 113 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 114 | static int mgcp_analyze_header(struct mgcp_parse_data *parse, char *data); |
| 115 | |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 116 | static int mgcp_check_param(const struct mgcp_endpoint *endp, const char *line) |
| 117 | { |
| 118 | const size_t line_len = strlen(line); |
| 119 | if (line[0] != '\0' && line_len < 2) { |
| 120 | LOGP(DMGCP, LOGL_ERROR, |
| 121 | "Wrong MGCP option format: '%s' on 0x%x\n", |
| 122 | line, ENDPOINT_NUMBER(endp)); |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | return 1; |
| 127 | } |
| 128 | |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 129 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 130 | { |
| 131 | int i; |
| 132 | |
| 133 | /* use the call id */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 134 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 135 | |
| 136 | /* handle wrap around */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 137 | if (cfg->last_call_id == CI_UNUSED) |
| 138 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 139 | |
| 140 | /* callstack can only be of size number_of_endpoints */ |
| 141 | /* 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] | 142 | for (i = 1; i < cfg->trunk.number_endpoints; ++i) |
| 143 | if (cfg->trunk.endpoints[i].ci == cfg->last_call_id) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 144 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 145 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 146 | return cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 147 | } |
| 148 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 149 | /* |
| 150 | * array of function pointers for handling various |
| 151 | * messages. In the future this might be binary sorted |
| 152 | * for performance reasons. |
| 153 | */ |
| 154 | static const struct mgcp_request mgcp_requests [] = { |
| 155 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 156 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 157 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 158 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 159 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 160 | |
| 161 | /* SPEC extension */ |
| 162 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 163 | }; |
| 164 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 165 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 166 | { |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 167 | struct msgb *msg; |
| 168 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 169 | if (!msg) |
| 170 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 171 | |
| 172 | return msg; |
| 173 | } |
| 174 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 175 | static struct msgb *do_retransmission(const struct mgcp_endpoint *endp) |
| 176 | { |
| 177 | struct msgb *msg = mgcp_msgb_alloc(); |
| 178 | if (!msg) |
| 179 | return NULL; |
| 180 | |
| 181 | msg->l2h = msgb_put(msg, strlen(endp->last_response)); |
| 182 | memcpy(msg->l2h, endp->last_response, msgb_l2len(msg)); |
| 183 | return msg; |
| 184 | } |
| 185 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 186 | static struct msgb *create_resp(struct mgcp_endpoint *endp, int code, |
| 187 | const char *txt, const char *msg, |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 188 | const char *trans, const char *param, |
| 189 | const char *sdp) |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 190 | { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 191 | int len; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 192 | struct msgb *res; |
| 193 | |
| 194 | res = mgcp_msgb_alloc(); |
| 195 | if (!res) |
| 196 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 197 | |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 198 | len = snprintf((char *) res->data, 2048, "%d %s%s%s\r\n%s", |
| 199 | code, trans, txt, param ? param : "", sdp ? sdp : ""); |
| 200 | if (len < 0) { |
| 201 | LOGP(DMGCP, LOGL_ERROR, "Failed to sprintf MGCP response.\n"); |
| 202 | msgb_free(res); |
| 203 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 204 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 205 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 206 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 207 | LOGP(DMGCP, LOGL_DEBUG, "Generated response: code: %d for '%s'\n", code, res->l2h); |
| 208 | |
| 209 | /* |
| 210 | * Remember the last transmission per endpoint. |
| 211 | */ |
| 212 | if (endp) { |
| 213 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 214 | talloc_free(endp->last_response); |
| 215 | talloc_free(endp->last_trans); |
| 216 | endp->last_trans = talloc_strdup(tcfg->endpoints, trans); |
| 217 | endp->last_response = talloc_strndup(tcfg->endpoints, |
| 218 | (const char *) res->l2h, |
| 219 | msgb_l2len(res)); |
| 220 | } |
| 221 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 222 | return res; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 223 | } |
| 224 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 225 | static struct msgb *create_ok_resp_with_param(struct mgcp_endpoint *endp, |
| 226 | int code, const char *msg, |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 227 | const char *trans, const char *param) |
| 228 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 229 | return create_resp(endp, code, " OK", msg, trans, param, NULL); |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 230 | } |
| 231 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 232 | static struct msgb *create_ok_response(struct mgcp_endpoint *endp, |
| 233 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 234 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 235 | 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] | 236 | } |
| 237 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 238 | static struct msgb *create_err_response(struct mgcp_endpoint *endp, |
| 239 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 240 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 241 | return create_resp(endp, code, " FAIL", msg, trans, NULL, NULL); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 242 | } |
| 243 | |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 244 | static int write_response_sdp(struct mgcp_endpoint *endp, |
| 245 | char *sdp_record, size_t size, const char *addr) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 246 | { |
Jacob Erlbeck | fe0301a | 2014-03-17 12:40:07 +0100 | [diff] [blame] | 247 | const char *fmtp_extra; |
| 248 | const char *audio_name; |
| 249 | int payload_type; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 250 | int len; |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 251 | int nchars; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 252 | |
Jacob Erlbeck | fe0301a | 2014-03-17 12:40:07 +0100 | [diff] [blame] | 253 | endp->cfg->get_net_downlink_format_cb(endp, &payload_type, |
| 254 | &audio_name, &fmtp_extra); |
| 255 | |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 256 | len = snprintf(sdp_record, size, |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 257 | "v=0\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 258 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 259 | "c=IN IP4 %s\r\n" |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 260 | "t=0 0\r\n", |
| 261 | endp->ci, addr, addr); |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 262 | |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 263 | if (len < 0 || len >= size) |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 264 | goto buffer_too_small; |
| 265 | |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 266 | if (payload_type >= 0) { |
| 267 | nchars = snprintf(sdp_record + len, size - len, |
| 268 | "m=audio %d RTP/AVP %d\r\n", |
| 269 | endp->net_end.local_port, payload_type); |
| 270 | if (nchars < 0 || nchars >= size - len) |
| 271 | goto buffer_too_small; |
| 272 | |
| 273 | len += nchars; |
| 274 | |
| 275 | if (audio_name) { |
| 276 | nchars = snprintf(sdp_record + len, size - len, |
| 277 | "a=rtpmap:%d %s\r\n", |
| 278 | payload_type, audio_name); |
| 279 | |
| 280 | if (nchars < 0 || nchars >= size - len) |
| 281 | goto buffer_too_small; |
| 282 | |
| 283 | len += nchars; |
| 284 | } |
| 285 | |
| 286 | if (fmtp_extra) { |
| 287 | nchars = snprintf(sdp_record + len, size - len, |
| 288 | "a=rtpmap:%d %s\r\n", |
| 289 | payload_type, audio_name); |
| 290 | |
| 291 | if (nchars < 0 || nchars >= size - len) |
| 292 | goto buffer_too_small; |
| 293 | |
| 294 | len += nchars; |
| 295 | } |
| 296 | } |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 297 | if (endp->bts_end.packet_duration_ms > 0 && endp->tcfg->audio_send_ptime) { |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 298 | nchars = snprintf(sdp_record + len, size - len, |
| 299 | "a=ptime:%d\r\n", |
| 300 | endp->bts_end.packet_duration_ms); |
| 301 | if (nchars < 0 || nchars >= size - len) |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 302 | goto buffer_too_small; |
| 303 | |
| 304 | len += nchars; |
| 305 | } |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 306 | |
| 307 | return len; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 308 | |
| 309 | buffer_too_small: |
| 310 | LOGP(DMGCP, LOGL_ERROR, "SDP buffer too small: %d (needed %d)\n", |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 311 | size, len); |
| 312 | return -1; |
| 313 | } |
| 314 | |
| 315 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 316 | const char *msg, const char *trans_id) |
| 317 | { |
| 318 | const char *addr = endp->cfg->local_ip; |
| 319 | char sdp_record[4096]; |
| 320 | int len; |
| 321 | int nchars; |
| 322 | |
| 323 | if (!addr) |
| 324 | addr = endp->cfg->source_addr; |
| 325 | |
| 326 | len = snprintf(sdp_record, sizeof(sdp_record), |
| 327 | "I: %u%s\n\n", |
| 328 | endp->ci, |
| 329 | endp->cfg->osmux && endp->osmux ? "\nX-Osmux: On" : ""); |
| 330 | |
| 331 | if (len < 0) |
| 332 | return NULL; |
| 333 | |
| 334 | nchars = write_response_sdp(endp, sdp_record + len, |
| 335 | sizeof(sdp_record) - len - 1, addr); |
| 336 | if (nchars < 0) |
| 337 | return NULL; |
| 338 | |
| 339 | len += nchars; |
| 340 | |
| 341 | sdp_record[sizeof(sdp_record) - 1] = '\0'; |
| 342 | |
| 343 | 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] | 344 | } |
| 345 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 346 | /* |
| 347 | * handle incoming messages: |
| 348 | * - this can be a command (four letters, space, transaction id) |
| 349 | * - or a response (three numbers, space, transaction id) |
| 350 | */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 351 | 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] | 352 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 353 | struct mgcp_parse_data pdata; |
| 354 | int i, code, handled = 0; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 355 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 356 | char *data; |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 357 | 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] | 358 | |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 359 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | bed02ba | 2012-12-07 16:46:19 +0100 | [diff] [blame] | 360 | 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] | 361 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 362 | } |
| 363 | |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 364 | /* Ensure that the msg->l2h is NUL terminated. */ |
| 365 | if (tail[-1] == '\0') |
| 366 | /* nothing to do */; |
| 367 | else if (msgb_tailroom(msg) > 0) |
| 368 | tail[0] = '\0'; |
| 369 | else if (tail[-1] == '\r' || tail[-1] == '\n') |
| 370 | tail[-1] = '\0'; |
| 371 | else { |
| 372 | LOGP(DMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| 373 | "Length: %d, Buffer size: %d\n", |
| 374 | msgb_l2len(msg), msg->data_len); |
| 375 | return NULL; |
| 376 | } |
| 377 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 378 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 379 | 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] | 380 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 381 | return NULL; |
| 382 | } |
| 383 | |
| 384 | msg->l3h = &msg->l2h[4]; |
| 385 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 386 | |
| 387 | /* |
| 388 | * Check for a duplicate message and respond. |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 389 | */ |
| 390 | memset(&pdata, 0, sizeof(pdata)); |
| 391 | pdata.cfg = cfg; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 392 | data = strline_r((char *) msg->l3h, &pdata.save); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 393 | pdata.found = mgcp_analyze_header(&pdata, data); |
| 394 | if (pdata.endp && pdata.trans |
| 395 | && pdata.endp->last_trans |
| 396 | && strcmp(pdata.endp->last_trans, pdata.trans) == 0) { |
| 397 | return do_retransmission(pdata.endp); |
| 398 | } |
| 399 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 400 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) { |
| 401 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
| 402 | handled = 1; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 403 | resp = mgcp_requests[i].handle_request(&pdata); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 404 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 405 | } |
| 406 | } |
| 407 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 408 | if (!handled) |
| 409 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
| 410 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 411 | return resp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 412 | } |
| 413 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 414 | /** |
| 415 | * We have a null terminated string with the endpoint name here. We only |
| 416 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 417 | * seen on the trunk side. |
| 418 | */ |
| 419 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 420 | const char *mgcp) |
| 421 | { |
| 422 | char *rest = NULL; |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 423 | struct mgcp_trunk_config *tcfg; |
| 424 | int trunk, endp; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 425 | |
| 426 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 427 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 428 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 429 | return NULL; |
| 430 | } |
| 431 | |
| 432 | endp = strtoul(rest + 1, &rest, 10); |
| 433 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 434 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 435 | return NULL; |
| 436 | } |
| 437 | |
| 438 | /* signalling is on timeslot 1 */ |
| 439 | if (endp == 1) |
| 440 | return NULL; |
| 441 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 442 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 443 | if (!tcfg) { |
| 444 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 445 | return NULL; |
| 446 | } |
| 447 | |
| 448 | if (!tcfg->endpoints) { |
| 449 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 450 | return NULL; |
| 451 | } |
| 452 | |
| 453 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 454 | 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] | 455 | return NULL; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 456 | } |
| 457 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 458 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 459 | } |
| 460 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 461 | 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] | 462 | { |
| 463 | char *endptr = NULL; |
| 464 | unsigned int gw = INT_MAX; |
| 465 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 466 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 467 | return find_e1_endpoint(cfg, mgcp); |
| 468 | } else { |
| 469 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 470 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 471 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 472 | } |
| 473 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 474 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 475 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 476 | } |
| 477 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 478 | /** |
| 479 | * @returns 0 when the status line was complete and transaction_id and |
| 480 | * endp out parameters are set. |
| 481 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 482 | 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] | 483 | { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 484 | int i = 0; |
Holger Hans Peter Freyther | 0b6dca7 | 2013-07-03 10:23:35 +0200 | [diff] [blame] | 485 | char *elem, *save = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 486 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 487 | pdata->trans = "000000"; |
Holger Hans Peter Freyther | 275c044 | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 488 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 489 | for (elem = strtok_r(data, " ", &save); elem; |
| 490 | elem = strtok_r(NULL, " ", &save)) { |
| 491 | switch (i) { |
| 492 | case 0: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 493 | pdata->trans = elem; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 494 | break; |
| 495 | case 1: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 496 | pdata->endp = find_endpoint(pdata->cfg, elem); |
| 497 | if (!pdata->endp) { |
| 498 | LOGP(DMGCP, LOGL_ERROR, |
| 499 | "Unable to find Endpoint `%s'\n", elem); |
| 500 | return -1; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 501 | } |
| 502 | break; |
| 503 | case 2: |
| 504 | if (strcmp("MGCP", elem)) { |
| 505 | LOGP(DMGCP, LOGL_ERROR, |
| 506 | "MGCP header parsing error\n"); |
| 507 | return -1; |
| 508 | } |
| 509 | break; |
| 510 | case 3: |
| 511 | if (strcmp("1.0", elem)) { |
| 512 | LOGP(DMGCP, LOGL_ERROR, "MGCP version `%s' " |
| 513 | "not supported\n", elem); |
| 514 | return -1; |
| 515 | } |
| 516 | break; |
| 517 | } |
| 518 | i++; |
| 519 | } |
| 520 | |
| 521 | if (i != 4) { |
| 522 | LOGP(DMGCP, LOGL_ERROR, "MGCP status line too short.\n"); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 523 | pdata->trans = "000000"; |
| 524 | pdata->endp = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 525 | return -1; |
| 526 | } |
| 527 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 528 | return 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 532 | const char *callid) |
| 533 | { |
| 534 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 535 | 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] | 536 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 537 | return -1; |
| 538 | } |
| 539 | |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 544 | const char *_ci) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 545 | { |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 546 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 547 | |
| 548 | if (ci != endp->ci) { |
| 549 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 550 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 551 | return -1; |
| 552 | } |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 557 | 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] | 558 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 559 | if (p->found != 0) |
| 560 | return create_err_response(NULL, 500, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 561 | else |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 562 | return create_ok_response(p->endp, 200, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 563 | } |
| 564 | |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 565 | static int parse_conn_mode(const char *msg, struct mgcp_endpoint *endp) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 566 | { |
| 567 | int ret = 0; |
| 568 | if (strcmp(msg, "recvonly") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 569 | endp->conn_mode = MGCP_CONN_RECV_ONLY; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 570 | else if (strcmp(msg, "sendrecv") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 571 | endp->conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | 0bfcbee | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 572 | else if (strcmp(msg, "sendonly") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 573 | endp->conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 0bdf20d | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 574 | else if (strcmp(msg, "loopback") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 575 | endp->conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 576 | else { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 577 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 578 | ret = -1; |
| 579 | } |
| 580 | |
Jacob Erlbeck | f318861 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 581 | endp->net_end.output_enabled = |
| 582 | endp->conn_mode & MGCP_CONN_SEND_ONLY ? 1 : 0; |
| 583 | endp->bts_end.output_enabled = |
| 584 | endp->conn_mode & MGCP_CONN_RECV_ONLY ? 1 : 0; |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 585 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 586 | return ret; |
| 587 | } |
| 588 | |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 589 | static int set_audio_info(void *ctx, struct mgcp_rtp_end *rtp, |
| 590 | int payload_type, const char *audio_name) |
| 591 | { |
| 592 | int rate = rtp->rate; |
| 593 | int channels = rtp->channels; |
| 594 | char audio_codec[64]; |
| 595 | |
| 596 | talloc_free(rtp->subtype_name); |
| 597 | rtp->subtype_name = NULL; |
| 598 | talloc_free(rtp->audio_name); |
| 599 | rtp->audio_name = NULL; |
| 600 | |
| 601 | rtp->payload_type = payload_type; |
| 602 | |
| 603 | if (!audio_name) { |
| 604 | switch (payload_type) { |
| 605 | case 3: audio_name = "GSM/8000/1"; break; |
| 606 | case 8: audio_name = "PCMA/8000/1"; break; |
| 607 | case 18: audio_name = "G729/8000/1"; break; |
| 608 | default: |
| 609 | /* Payload type is unknown, don't change rate and |
| 610 | * channels. */ |
| 611 | /* TODO: return value? */ |
| 612 | return 0; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | if (sscanf(audio_name, "%63[^/]/%d/%d", |
| 617 | audio_codec, &rate, &channels) < 2) |
| 618 | return -EINVAL; |
| 619 | |
| 620 | rtp->rate = rate; |
| 621 | rtp->channels = channels; |
| 622 | rtp->subtype_name = talloc_strdup(ctx, audio_codec); |
| 623 | rtp->audio_name = talloc_strdup(ctx, audio_name); |
| 624 | if (channels != 1) |
| 625 | LOGP(DMGCP, LOGL_NOTICE, |
| 626 | "Channels != 1 in SDP: '%s'\n", audio_name); |
| 627 | |
| 628 | return 0; |
| 629 | } |
| 630 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 631 | 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] | 632 | struct mgcp_port_range *range, |
| 633 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 634 | { |
| 635 | int i; |
| 636 | |
| 637 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 638 | end->local_alloc = PORT_ALLOC_STATIC; |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | /* attempt to find a port */ |
| 643 | for (i = 0; i < 200; ++i) { |
| 644 | int rc; |
| 645 | |
| 646 | if (range->last_port >= range->range_end) |
| 647 | range->last_port = range->range_start; |
| 648 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 649 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 650 | |
| 651 | range->last_port += 2; |
| 652 | if (rc == 0) { |
| 653 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | } |
| 658 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 659 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 660 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 661 | return -1; |
| 662 | } |
| 663 | |
| 664 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 665 | { |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 666 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 667 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 668 | return -1; |
| 669 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 670 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 671 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 672 | mgcp_rtp_end_reset(&endp->net_end); |
| 673 | return -1; |
| 674 | } |
| 675 | |
Holger Hans Peter Freyther | 1b8eaf4 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 676 | 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] | 677 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 678 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 679 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 680 | mgcp_rtp_end_reset(&endp->net_end); |
| 681 | mgcp_rtp_end_reset(&endp->bts_end); |
| 682 | return -1; |
| 683 | } |
| 684 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 685 | if (allocate_port(endp, &endp->trans_bts, |
| 686 | &endp->cfg->transcoder_ports, |
| 687 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 688 | mgcp_rtp_end_reset(&endp->net_end); |
| 689 | mgcp_rtp_end_reset(&endp->bts_end); |
| 690 | mgcp_rtp_end_reset(&endp->trans_net); |
| 691 | return -1; |
| 692 | } |
| 693 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 694 | /* remember that we have set up transcoding */ |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 695 | endp->type = MGCP_RTP_TRANSCODED; |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 696 | } |
| 697 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 698 | return 0; |
| 699 | } |
| 700 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 701 | static int parse_sdp_data(struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p) |
| 702 | { |
| 703 | char *line; |
| 704 | int found_media = 0; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 705 | int audio_payload = -1; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 706 | |
| 707 | for_each_line(line, p->save) { |
| 708 | switch (line[0]) { |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 709 | case 'o': |
| 710 | case 's': |
| 711 | case 't': |
| 712 | case 'v': |
| 713 | /* skip these SDP attributes */ |
| 714 | break; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 715 | case 'a': { |
| 716 | int payload; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 717 | int ptime, ptime2 = 0; |
| 718 | char audio_name[64]; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 719 | |
| 720 | if (audio_payload == -1) |
| 721 | break; |
| 722 | |
Holger Hans Peter Freyther | 4ffdb3c | 2014-05-28 16:44:34 +0200 | [diff] [blame] | 723 | if (sscanf(line, "a=rtpmap:%d %63s", |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 724 | &payload, audio_name) == 2) { |
| 725 | if (payload != audio_payload) |
| 726 | break; |
| 727 | |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 728 | set_audio_info(p->cfg, rtp, payload, audio_name); |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 729 | } else if (sscanf(line, "a=ptime:%d-%d", |
| 730 | &ptime, &ptime2) >= 1) { |
| 731 | if (ptime2 > 0 && ptime2 != ptime) |
| 732 | rtp->packet_duration_ms = 0; |
| 733 | else |
| 734 | rtp->packet_duration_ms = ptime; |
| 735 | } else if (sscanf(line, "a=maxptime:%d", &ptime2) == 1) { |
| 736 | if (ptime2 * rtp->frame_duration_den > |
| 737 | rtp->frame_duration_num * 1500) |
| 738 | /* more than 1 frame */ |
| 739 | rtp->packet_duration_ms = 0; |
| 740 | } |
| 741 | break; |
| 742 | } |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 743 | case 'm': { |
| 744 | int port; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 745 | audio_payload = -1; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 746 | |
| 747 | if (sscanf(line, "m=audio %d RTP/AVP %d", |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 748 | &port, &audio_payload) == 2) { |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 749 | rtp->rtp_port = htons(port); |
| 750 | rtp->rtcp_port = htons(port + 1); |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 751 | found_media = 1; |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 752 | set_audio_info(p->cfg, rtp, audio_payload, NULL); |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 753 | } |
| 754 | break; |
| 755 | } |
| 756 | case 'c': { |
| 757 | char ipv4[16]; |
| 758 | |
| 759 | if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) { |
| 760 | inet_aton(ipv4, &rtp->addr); |
| 761 | } |
| 762 | break; |
| 763 | } |
| 764 | default: |
| 765 | if (p->endp) |
| 766 | LOGP(DMGCP, LOGL_NOTICE, |
| 767 | "Unhandled SDP option: '%c'/%d on 0x%x\n", |
| 768 | line[0], line[0], ENDPOINT_NUMBER(p->endp)); |
| 769 | else |
| 770 | LOGP(DMGCP, LOGL_NOTICE, |
| 771 | "Unhandled SDP option: '%c'/%d\n", |
| 772 | line[0], line[0]); |
| 773 | break; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | if (found_media) |
| 778 | LOGP(DMGCP, LOGL_NOTICE, |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 779 | "Got media info via SDP: port %d, payload %d (%s), " |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 780 | "duration %d, addr %s\n", |
| 781 | ntohs(rtp->rtp_port), rtp->payload_type, |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 782 | rtp->subtype_name ? rtp->subtype_name : "unknown", |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 783 | rtp->packet_duration_ms, inet_ntoa(rtp->addr)); |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 784 | |
| 785 | return found_media; |
| 786 | } |
| 787 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 788 | /* Set the LCO from a string (see RFC 3435). |
| 789 | * The string is stored in the 'string' field. A NULL string is handled excatly |
| 790 | * like an empty string, the 'string' field is never NULL after this function |
| 791 | * has been called. */ |
| 792 | static void set_local_cx_options(void *ctx, struct mgcp_lco *lco, |
| 793 | const char *options) |
| 794 | { |
| 795 | char *p_opt; |
| 796 | |
| 797 | talloc_free(lco->string); |
| 798 | lco->pkt_period_min = lco->pkt_period_max = 0; |
| 799 | lco->string = talloc_strdup(ctx, options ? options : ""); |
| 800 | |
| 801 | p_opt = strstr(lco->string, "p:"); |
| 802 | if (p_opt && sscanf(p_opt, "p:%d-%d", |
| 803 | &lco->pkt_period_min, &lco->pkt_period_max) == 1) |
| 804 | lco->pkt_period_max = lco->pkt_period_min; |
| 805 | } |
| 806 | |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 807 | void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change, |
| 808 | struct mgcp_rtp_end *rtp) |
| 809 | { |
| 810 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 811 | |
Jacob Erlbeck | 2b57b4c | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 812 | int patch_ssrc = expect_ssrc_change && tcfg->force_constant_ssrc; |
| 813 | |
Jacob Erlbeck | f12c849 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 814 | rtp->force_aligned_timing = tcfg->force_aligned_timing; |
Jacob Erlbeck | 2b57b4c | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 815 | rtp->force_constant_ssrc = patch_ssrc ? 1 : 0; |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 816 | |
| 817 | LOGP(DMGCP, LOGL_DEBUG, |
| 818 | "Configuring RTP endpoint: local port %d%s%s\n", |
| 819 | ntohs(rtp->rtp_port), |
Jacob Erlbeck | f12c849 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 820 | rtp->force_aligned_timing ? ", force constant timing" : "", |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 821 | rtp->force_constant_ssrc ? ", force constant ssrc" : ""); |
| 822 | } |
| 823 | |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 824 | uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp, |
| 825 | struct mgcp_rtp_end *rtp) |
| 826 | { |
| 827 | int f = 0; |
| 828 | |
| 829 | /* Get the number of frames per channel and packet */ |
| 830 | if (rtp->frames_per_packet) |
| 831 | f = rtp->frames_per_packet; |
| 832 | else if (rtp->packet_duration_ms && rtp->frame_duration_num) { |
| 833 | int den = 1000 * rtp->frame_duration_num; |
| 834 | f = (rtp->packet_duration_ms * rtp->frame_duration_den + den/2) |
| 835 | / den; |
| 836 | } |
| 837 | |
| 838 | return rtp->rate * f * rtp->frame_duration_num / rtp->frame_duration_den; |
| 839 | } |
| 840 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 841 | 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] | 842 | { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 843 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 844 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 845 | int error_code = 400; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 846 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 847 | const char *local_options = NULL; |
| 848 | const char *callid = NULL; |
| 849 | const char *mode = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 850 | char *line; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 851 | int have_sdp = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 852 | |
| 853 | if (p->found != 0) |
| 854 | return create_err_response(NULL, 510, "CRCX", p->trans); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 855 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 856 | /* parse CallID C: and LocalParameters L: */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 857 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 858 | if (!mgcp_check_param(endp, line)) |
| 859 | continue; |
| 860 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 861 | switch (line[0]) { |
| 862 | case 'L': |
| 863 | local_options = (const char *) line + 3; |
| 864 | break; |
| 865 | case 'C': |
| 866 | callid = (const char *) line + 3; |
| 867 | break; |
| 868 | case 'M': |
| 869 | mode = (const char *) line + 3; |
| 870 | break; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 871 | case 'X': |
| 872 | if (strcmp("Osmux: on", line + 2) == 0 && |
| 873 | osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 874 | LOGP(DMGCP, LOGL_ERROR, |
| 875 | "Could not activate osmux in endpoint %d\n", |
| 876 | ENDPOINT_NUMBER(endp)); |
| 877 | } |
| 878 | break; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 879 | case '\0': |
| 880 | have_sdp = 1; |
| 881 | goto mgcp_header_done; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 882 | default: |
| 883 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 884 | *line, *line, ENDPOINT_NUMBER(endp)); |
| 885 | break; |
| 886 | } |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 887 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 888 | |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 889 | mgcp_header_done: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 890 | tcfg = p->endp->tcfg; |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 891 | |
| 892 | /* Check required data */ |
| 893 | if (!callid || !mode) { |
| 894 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 895 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 896 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 897 | } |
| 898 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 899 | if (endp->allocated) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 900 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 901 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 902 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 5c132ee | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 903 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 904 | if (p->cfg->realloc_cb) |
| 905 | p->cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 906 | } else { |
| 907 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 908 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 909 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 910 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 911 | } |
| 912 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 913 | /* copy some parameters */ |
| 914 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 915 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 916 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 917 | local_options); |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 918 | |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 919 | if (parse_conn_mode(mode, endp) != 0) { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 920 | error_code = 517; |
| 921 | goto error2; |
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 | |
| 924 | /* initialize */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 925 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 926 | mgcp_rtp_end_config(endp, 0, &endp->net_end); |
| 927 | mgcp_rtp_end_config(endp, 0, &endp->bts_end); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 928 | |
| 929 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 930 | 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] | 931 | |
| 932 | /* bind to the port now */ |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 933 | if (allocate_ports(endp) != 0) |
| 934 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 935 | |
| 936 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 937 | endp->ci = generate_call_id(p->cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 938 | if (endp->ci == CI_UNUSED) |
| 939 | goto error2; |
| 940 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 941 | endp->allocated = 1; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 942 | |
| 943 | /* set up RTP media parameters */ |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 944 | set_audio_info(p->cfg, &endp->bts_end, tcfg->audio_payload, tcfg->audio_name); |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 945 | endp->bts_end.fmtp_extra = talloc_strdup(tcfg->endpoints, |
| 946 | tcfg->audio_fmtp_extra); |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 947 | if (have_sdp) { |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 948 | parse_sdp_data(&endp->net_end, p); |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 949 | setup_rtp_processing(endp); |
| 950 | } |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 951 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 952 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 953 | if (p->cfg->policy_cb) { |
| 954 | int rc; |
| 955 | rc = p->cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), |
| 956 | MGCP_ENDP_CRCX, p->trans); |
| 957 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 958 | case MGCP_POLICY_REJECT: |
| 959 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 960 | ENDPOINT_NUMBER(endp)); |
| 961 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 962 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 963 | break; |
| 964 | case MGCP_POLICY_DEFER: |
| 965 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 966 | create_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 967 | return NULL; |
| 968 | break; |
| 969 | case MGCP_POLICY_CONT: |
| 970 | /* just continue */ |
| 971 | break; |
| 972 | } |
| 973 | } |
| 974 | |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 975 | 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] | 976 | ENDPOINT_NUMBER(endp), endp->ci, |
| 977 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 978 | if (p->cfg->change_cb) |
| 979 | 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] | 980 | |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 981 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && tcfg->keepalive_interval != 0) { |
| 982 | if (endp->osmux) |
| 983 | osmux_send_dummy(endp); |
| 984 | else |
| 985 | mgcp_send_dummy(endp); |
| 986 | } |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 987 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 988 | create_transcoder(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 989 | return create_response_with_sdp(endp, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 990 | error2: |
Holger Hans Peter Freyther | 411764b | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 991 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 992 | 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] | 993 | return create_err_response(endp, error_code, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 994 | } |
| 995 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 996 | 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] | 997 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 998 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 999 | int error_code = 500; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 1000 | int silent = 0, osmux = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1001 | char *line; |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1002 | const char *local_options = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1003 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1004 | if (p->found != 0) |
| 1005 | return create_err_response(NULL, 510, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1006 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1007 | if (endp->ci == CI_UNUSED) { |
| 1008 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 1009 | "holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 1010 | return create_err_response(endp, 400, "MDCX", p->trans); |
| 1011 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1012 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1013 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 1014 | if (!mgcp_check_param(endp, line)) |
| 1015 | continue; |
| 1016 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1017 | switch (line[0]) { |
| 1018 | case 'C': { |
| 1019 | if (verify_call_id(endp, line + 3) != 0) |
| 1020 | goto error3; |
| 1021 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1022 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1023 | case 'I': { |
| 1024 | if (verify_ci(endp, line + 3) != 0) |
| 1025 | goto error3; |
| 1026 | break; |
| 1027 | } |
| 1028 | case 'L': |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1029 | local_options = (const char *) line + 3; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1030 | break; |
| 1031 | case 'M': |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 1032 | if (parse_conn_mode(line + 3, endp) != 0) { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1033 | error_code = 517; |
| 1034 | goto error3; |
| 1035 | } |
| 1036 | endp->orig_mode = endp->conn_mode; |
| 1037 | break; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 1038 | case 'X': |
| 1039 | if (strcmp("Osmux: on", line + 2) == 0) |
| 1040 | osmux = 1; |
| 1041 | break; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1042 | case 'Z': |
| 1043 | silent = strcmp("noanswer", line + 3) == 0; |
| 1044 | break; |
| 1045 | case '\0': |
| 1046 | /* SDP file begins */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1047 | parse_sdp_data(&endp->net_end, p); |
| 1048 | /* This will exhaust p->save, so the loop will |
| 1049 | * terminate next time. |
| 1050 | */ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1051 | break; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1052 | default: |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1053 | 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] | 1054 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 1055 | break; |
| 1056 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1057 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1058 | |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 1059 | /* Re-enable Osmux if we receive a MDCX, we have to set up a new |
| 1060 | * RTP flow: this generates a randomly allocated RTP SSRC and sequence |
| 1061 | * number. |
| 1062 | */ |
| 1063 | if (osmux) { |
| 1064 | if (osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 1065 | LOGP(DMGCP, LOGL_ERROR, |
| 1066 | "Could not update osmux in endpoint %d\n", |
| 1067 | ENDPOINT_NUMBER(endp)); |
| 1068 | } |
| 1069 | LOGP(DMGCP, LOGL_NOTICE, |
| 1070 | "Re-enabling osmux in endpoint %d, we got updated\n", |
| 1071 | ENDPOINT_NUMBER(endp)); |
| 1072 | } |
| 1073 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1074 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 1075 | local_options); |
| 1076 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 1077 | setup_rtp_processing(endp); |
| 1078 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1079 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1080 | if (p->cfg->policy_cb) { |
| 1081 | int rc; |
| 1082 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 1083 | MGCP_ENDP_MDCX, p->trans); |
| 1084 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1085 | case MGCP_POLICY_REJECT: |
| 1086 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 1087 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1088 | if (silent) |
| 1089 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1090 | return create_err_response(endp, 400, "MDCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1091 | break; |
| 1092 | case MGCP_POLICY_DEFER: |
| 1093 | /* stop processing */ |
| 1094 | return NULL; |
| 1095 | break; |
| 1096 | case MGCP_POLICY_CONT: |
| 1097 | /* just continue */ |
| 1098 | break; |
| 1099 | } |
| 1100 | } |
| 1101 | |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 1102 | mgcp_rtp_end_config(endp, 1, &endp->net_end); |
| 1103 | mgcp_rtp_end_config(endp, 1, &endp->bts_end); |
| 1104 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1105 | /* modify */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 1106 | 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] | 1107 | 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] | 1108 | if (p->cfg->change_cb) |
| 1109 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1110 | |
Jacob Erlbeck | f318861 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 1111 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && |
| 1112 | endp->tcfg->keepalive_interval != 0) |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1113 | mgcp_send_dummy(endp); |
| 1114 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1115 | if (silent) |
| 1116 | goto out_silent; |
| 1117 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1118 | return create_response_with_sdp(endp, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1119 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1120 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1121 | return create_err_response(endp, error_code, "MDCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1122 | |
| 1123 | |
| 1124 | out_silent: |
| 1125 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1126 | } |
| 1127 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1128 | 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] | 1129 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1130 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 1131 | int error_code = 400; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1132 | int silent = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1133 | char *line; |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1134 | char stats[1048]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1135 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1136 | if (p->found != 0) |
| 1137 | return create_err_response(NULL, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1138 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1139 | if (!p->endp->allocated) { |
| 1140 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", |
| 1141 | ENDPOINT_NUMBER(endp)); |
| 1142 | return create_err_response(endp, 400, "DLCX", p->trans); |
| 1143 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1144 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1145 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 1146 | if (!mgcp_check_param(endp, line)) |
| 1147 | continue; |
| 1148 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1149 | switch (line[0]) { |
| 1150 | case 'C': |
| 1151 | if (verify_call_id(endp, line + 3) != 0) |
| 1152 | goto error3; |
| 1153 | break; |
| 1154 | case 'I': |
| 1155 | if (verify_ci(endp, line + 3) != 0) |
| 1156 | goto error3; |
| 1157 | break; |
| 1158 | case 'Z': |
| 1159 | silent = strcmp("noanswer", line + 3) == 0; |
| 1160 | break; |
| 1161 | default: |
| 1162 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 1163 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 1164 | break; |
| 1165 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1166 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1167 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1168 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1169 | if (p->cfg->policy_cb) { |
| 1170 | int rc; |
| 1171 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 1172 | MGCP_ENDP_DLCX, p->trans); |
| 1173 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1174 | case MGCP_POLICY_REJECT: |
| 1175 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 1176 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1177 | if (silent) |
| 1178 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1179 | return create_err_response(endp, 400, "DLCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1180 | break; |
| 1181 | case MGCP_POLICY_DEFER: |
| 1182 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1183 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1184 | return NULL; |
| 1185 | break; |
| 1186 | case MGCP_POLICY_CONT: |
| 1187 | /* just continue */ |
| 1188 | break; |
| 1189 | } |
| 1190 | } |
| 1191 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1192 | /* free the connection */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 1193 | 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] | 1194 | 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] | 1195 | |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1196 | /* save the statistics of the current call */ |
| 1197 | mgcp_format_stats(endp, stats, sizeof(stats)); |
| 1198 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1199 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1200 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1201 | if (p->cfg->change_cb) |
| 1202 | 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] | 1203 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1204 | if (silent) |
| 1205 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1206 | 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] | 1207 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1208 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1209 | return create_err_response(endp, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1210 | |
| 1211 | out_silent: |
| 1212 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1213 | } |
| 1214 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1215 | static struct msgb *handle_rsip(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1216 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1217 | if (p->found != 0) { |
Holger Hans Peter Freyther | 26bd848 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 1218 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 1219 | return NULL; |
| 1220 | } |
| 1221 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1222 | if (p->cfg->reset_cb) |
| 1223 | p->cfg->reset_cb(p->endp->tcfg); |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1224 | return NULL; |
| 1225 | } |
| 1226 | |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1227 | static char extract_tone(const char *line) |
| 1228 | { |
| 1229 | const char *str = strstr(line, "D/"); |
| 1230 | if (!str) |
| 1231 | return CHAR_MAX; |
| 1232 | |
| 1233 | return str[2]; |
| 1234 | } |
| 1235 | |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1236 | /* |
| 1237 | * This can request like DTMF detection and forward, fax detection... it |
| 1238 | * can also request when the notification should be send and such. We don't |
| 1239 | * do this right now. |
| 1240 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1241 | 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] | 1242 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1243 | int res = 0; |
| 1244 | char *line; |
Holger Hans Peter Freyther | a229748 | 2013-05-21 17:04:35 +0200 | [diff] [blame] | 1245 | char tone = CHAR_MAX; |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1246 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1247 | if (p->found != 0) |
| 1248 | return create_err_response(NULL, 400, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1249 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1250 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1251 | switch (line[0]) { |
| 1252 | case 'S': |
| 1253 | tone = extract_tone(line); |
| 1254 | break; |
| 1255 | } |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1256 | } |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1257 | |
| 1258 | /* we didn't see a signal request with a tone */ |
| 1259 | if (tone == CHAR_MAX) |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1260 | return create_ok_response(p->endp, 200, "RQNT", p->trans); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1261 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1262 | if (p->cfg->rqnt_cb) |
| 1263 | res = p->cfg->rqnt_cb(p->endp, tone); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1264 | |
| 1265 | return res == 0 ? |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1266 | create_ok_response(p->endp, 200, "RQNT", p->trans) : |
| 1267 | create_err_response(p->endp, res, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1268 | } |
| 1269 | |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1270 | static void mgcp_keepalive_timer_cb(void *_tcfg) |
| 1271 | { |
| 1272 | struct mgcp_trunk_config *tcfg = _tcfg; |
| 1273 | int i; |
| 1274 | LOGP(DMGCP, LOGL_DEBUG, "Triggered trunk %d keepalive timer.\n", |
| 1275 | tcfg->trunk_nr); |
| 1276 | |
| 1277 | if (tcfg->keepalive_interval <= 0) |
| 1278 | return; |
| 1279 | |
| 1280 | for (i = 1; i < tcfg->number_endpoints; ++i) { |
| 1281 | struct mgcp_endpoint *endp = &tcfg->endpoints[i]; |
| 1282 | if (endp->conn_mode == MGCP_CONN_RECV_ONLY) |
| 1283 | mgcp_send_dummy(endp); |
| 1284 | } |
| 1285 | |
| 1286 | LOGP(DMGCP, LOGL_DEBUG, "Rescheduling trunk %d keepalive timer.\n", |
| 1287 | tcfg->trunk_nr); |
| 1288 | osmo_timer_schedule(&tcfg->keepalive_timer, tcfg->keepalive_interval, 0); |
| 1289 | } |
| 1290 | |
| 1291 | void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval) |
| 1292 | { |
| 1293 | tcfg->keepalive_interval = interval; |
| 1294 | tcfg->keepalive_timer.data = tcfg; |
| 1295 | tcfg->keepalive_timer.cb = mgcp_keepalive_timer_cb; |
| 1296 | |
| 1297 | if (interval <= 0) |
| 1298 | osmo_timer_del(&tcfg->keepalive_timer); |
| 1299 | else |
| 1300 | osmo_timer_schedule(&tcfg->keepalive_timer, |
| 1301 | tcfg->keepalive_interval, 0); |
| 1302 | } |
| 1303 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1304 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1305 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1306 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1307 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1308 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 1309 | if (!cfg) { |
| 1310 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 1311 | return NULL; |
| 1312 | } |
| 1313 | |
| 1314 | cfg->source_port = 2427; |
| 1315 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1316 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1317 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 2ea9118 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 1318 | |
| 1319 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 1320 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1321 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 1322 | cfg->rtp_processing_cb = &mgcp_rtp_processing_default; |
| 1323 | cfg->setup_rtp_processing_cb = &mgcp_setup_rtp_processing_default; |
| 1324 | |
Jacob Erlbeck | fe0301a | 2014-03-17 12:40:07 +0100 | [diff] [blame] | 1325 | cfg->get_net_downlink_format_cb = &mgcp_get_net_downlink_format_default; |
| 1326 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1327 | /* default trunk handling */ |
| 1328 | cfg->trunk.cfg = cfg; |
| 1329 | cfg->trunk.trunk_nr = 0; |
| 1330 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 1331 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1332 | cfg->trunk.audio_payload = 126; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1333 | cfg->trunk.audio_send_ptime = 1; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1334 | cfg->trunk.omit_rtcp = 0; |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1335 | mgcp_trunk_set_keepalive(&cfg->trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1336 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1337 | INIT_LLIST_HEAD(&cfg->trunks); |
| 1338 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1339 | return cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1340 | } |
| 1341 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1342 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 1343 | { |
| 1344 | struct mgcp_trunk_config *trunk; |
| 1345 | |
| 1346 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 1347 | if (!trunk) { |
| 1348 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 1349 | return NULL; |
| 1350 | } |
| 1351 | |
| 1352 | trunk->cfg = cfg; |
| 1353 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 1354 | trunk->trunk_nr = nr; |
| 1355 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1356 | trunk->audio_payload = 126; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1357 | trunk->audio_send_ptime = 1; |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1358 | trunk->number_endpoints = 33; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1359 | trunk->omit_rtcp = 0; |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1360 | mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1361 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 1362 | return trunk; |
| 1363 | } |
| 1364 | |
| 1365 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 1366 | { |
| 1367 | struct mgcp_trunk_config *trunk; |
| 1368 | |
| 1369 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 1370 | if (trunk->trunk_nr == index) |
| 1371 | return trunk; |
| 1372 | |
| 1373 | return NULL; |
| 1374 | } |
| 1375 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1376 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 1377 | { |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1378 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1379 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1380 | end->local_port = 0; |
| 1381 | } |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1382 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1383 | end->packets = 0; |
Holger Hans Peter Freyther | 3e45610 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 1384 | end->octets = 0; |
Jacob Erlbeck | 8c1f4b0 | 2013-12-19 12:13:32 +0100 | [diff] [blame] | 1385 | end->dropped_packets = 0; |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1386 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1387 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1388 | end->payload_type = -1; |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1389 | end->local_alloc = -1; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 1390 | talloc_free(end->fmtp_extra); |
| 1391 | end->fmtp_extra = NULL; |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 1392 | talloc_free(end->subtype_name); |
| 1393 | end->subtype_name = NULL; |
| 1394 | talloc_free(end->audio_name); |
| 1395 | end->audio_name = NULL; |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 1396 | talloc_free(end->rtp_process_data); |
| 1397 | end->rtp_process_data = NULL; |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 1398 | |
| 1399 | /* Set default values */ |
| 1400 | end->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM; |
| 1401 | end->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN; |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 1402 | end->frames_per_packet = 0; /* unknown */ |
| 1403 | end->packet_duration_ms = DEFAULT_RTP_AUDIO_PACKET_DURATION_MS; |
| 1404 | end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; |
Jacob Erlbeck | 8f518d6 | 2014-03-17 12:30:56 +0100 | [diff] [blame] | 1405 | end->channels = DEFAULT_RTP_AUDIO_DEFAULT_CHANNELS; |
Jacob Erlbeck | b866d3b | 2014-01-16 16:50:39 +0100 | [diff] [blame] | 1406 | end->output_enabled = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1407 | } |
| 1408 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1409 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 1410 | { |
| 1411 | mgcp_rtp_end_reset(end); |
| 1412 | end->rtp.fd = -1; |
| 1413 | end->rtcp.fd = -1; |
| 1414 | } |
| 1415 | |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1416 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1417 | { |
| 1418 | int i; |
| 1419 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1420 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1421 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1422 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1423 | tcfg->number_endpoints, "endpoints"); |
| 1424 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1425 | return -1; |
| 1426 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1427 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 1428 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1429 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1430 | tcfg->endpoints[i].tcfg = tcfg; |
| 1431 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 1432 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 1433 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 1434 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1435 | } |
| 1436 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1437 | return 0; |
| 1438 | } |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1439 | |
| 1440 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 1441 | { |
Holger Hans Peter Freyther | 62d3bb7 | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 1442 | 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] | 1443 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 1444 | endp->allocated = 0; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1445 | |
Holger Hans Peter Freyther | e9564b2 | 2012-12-07 11:52:16 +0100 | [diff] [blame] | 1446 | talloc_free(endp->callid); |
| 1447 | endp->callid = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1448 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1449 | talloc_free(endp->local_options.string); |
| 1450 | endp->local_options.string = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1451 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1452 | mgcp_rtp_end_reset(&endp->bts_end); |
| 1453 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1454 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1455 | mgcp_rtp_end_reset(&endp->trans_bts); |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1456 | endp->type = MGCP_RTP_DEFAULT; |
Holger Hans Peter Freyther | e758d95 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 1457 | |
Holger Hans Peter Freyther | 84ba528 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 1458 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 1459 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | b33ded1 | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 1460 | |
| 1461 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 8fdb95e | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 1462 | |
| 1463 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1464 | } |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1465 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1466 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 1467 | { |
| 1468 | struct sockaddr_in addr; |
| 1469 | |
| 1470 | memset(&addr, 0, sizeof(addr)); |
| 1471 | addr.sin_family = AF_INET; |
| 1472 | addr.sin_addr = cfg->transcoder_in; |
| 1473 | addr.sin_port = htons(2427); |
| 1474 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 1475 | (struct sockaddr *) &addr, sizeof(addr)); |
| 1476 | } |
| 1477 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1478 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 1479 | const char *msg, const char *mode) |
| 1480 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1481 | char buf[2096]; |
| 1482 | int len; |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 1483 | int nchars; |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1484 | |
| 1485 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 1486 | len = snprintf(buf, sizeof(buf), |
| 1487 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 1488 | "C: 4256\r\n" |
| 1489 | "M: %s\r\n" |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 1490 | "\r\n", |
| 1491 | msg, endpoint, mode); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1492 | |
| 1493 | if (len < 0) |
| 1494 | return; |
| 1495 | |
Jacob Erlbeck | f2bc639 | 2014-03-14 18:01:20 +0100 | [diff] [blame] | 1496 | nchars = write_response_sdp(endp, buf + len, sizeof(buf) + len - 1, |
| 1497 | endp->cfg->source_addr); |
| 1498 | if (nchars < 0) |
| 1499 | return; |
| 1500 | |
| 1501 | len += nchars; |
| 1502 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1503 | buf[sizeof(buf) - 1] = '\0'; |
| 1504 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1505 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1506 | } |
| 1507 | |
| 1508 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1509 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1510 | char buf[2096]; |
| 1511 | int len; |
| 1512 | |
| 1513 | len = snprintf(buf, sizeof(buf), |
| 1514 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1515 | "C: 4256\r\n" |
| 1516 | , endpoint); |
| 1517 | |
| 1518 | if (len < 0) |
| 1519 | return; |
| 1520 | |
| 1521 | buf[sizeof(buf) - 1] = '\0'; |
| 1522 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1523 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1524 | } |
| 1525 | |
Harald Welte | ba4f8b2 | 2012-01-27 00:41:39 +0100 | [diff] [blame] | 1526 | static int send_agent(struct mgcp_config *cfg, const char *buf, int len) |
| 1527 | { |
| 1528 | return write(cfg->gw_fd.bfd.fd, buf, len); |
| 1529 | } |
| 1530 | |
| 1531 | int mgcp_send_reset_all(struct mgcp_config *cfg) |
| 1532 | { |
| 1533 | static const char mgcp_reset[] = { |
| 1534 | "RSIP 1 *@mgw MGCP 1.0\r\n" |
| 1535 | }; |
| 1536 | |
| 1537 | return send_agent(cfg, mgcp_reset, sizeof mgcp_reset -1); |
| 1538 | } |
| 1539 | |
| 1540 | int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint) |
| 1541 | { |
| 1542 | char buf[128]; |
| 1543 | int len; |
| 1544 | |
| 1545 | len = snprintf(buf, sizeof(buf), |
| 1546 | "RSIP 39 %x@mgw MGCP 1.0\r\n" |
| 1547 | , endpoint); |
| 1548 | if (len < 0) |
| 1549 | return len; |
| 1550 | |
| 1551 | buf[sizeof(buf) - 1] = '\0'; |
| 1552 | |
| 1553 | return send_agent(endp->cfg, buf, len); |
| 1554 | } |
| 1555 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame] | 1556 | static void setup_rtp_processing(struct mgcp_endpoint *endp) |
| 1557 | { |
| 1558 | struct mgcp_config *cfg = endp->cfg; |
| 1559 | |
| 1560 | if (endp->type != MGCP_RTP_DEFAULT) |
| 1561 | return; |
| 1562 | |
| 1563 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 1564 | return; |
| 1565 | |
| 1566 | if (endp->conn_mode & MGCP_CONN_SEND_ONLY) |
| 1567 | cfg->setup_rtp_processing_cb(endp, &endp->net_end, &endp->bts_end); |
| 1568 | else |
| 1569 | cfg->setup_rtp_processing_cb(endp, &endp->net_end, NULL); |
| 1570 | |
| 1571 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY) |
| 1572 | cfg->setup_rtp_processing_cb(endp, &endp->bts_end, &endp->net_end); |
| 1573 | else |
| 1574 | cfg->setup_rtp_processing_cb(endp, &endp->bts_end, NULL); |
| 1575 | } |
| 1576 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1577 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1578 | { |
| 1579 | int port; |
| 1580 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1581 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1582 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1583 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1584 | return; |
| 1585 | |
Holger Hans Peter Freyther | c9e3bc6 | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1586 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1587 | 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] | 1588 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1589 | 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] | 1590 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1591 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1592 | endp->trans_bts.rtp_port = htons(port); |
| 1593 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1594 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1595 | 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] | 1596 | endp->trans_net.rtp_port = htons(port); |
| 1597 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1598 | } |
| 1599 | |
| 1600 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1601 | { |
| 1602 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1603 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1604 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1605 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1606 | return; |
| 1607 | |
| 1608 | send_dlcx(endp, in_endp); |
| 1609 | send_dlcx(endp, out_endp); |
| 1610 | } |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1611 | |
| 1612 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1613 | { |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1614 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | bafc987 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1615 | return 0; |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1616 | |
| 1617 | static const char mgcp_reset[] = { |
| 1618 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1619 | }; |
| 1620 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1621 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1622 | } |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1623 | |
| 1624 | void mgcp_format_stats(struct mgcp_endpoint *endp, char *msg, size_t size) |
| 1625 | { |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1626 | uint32_t expected, jitter; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1627 | int ploss; |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1628 | int nchars; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1629 | mgcp_state_calc_loss(&endp->net_state, &endp->net_end, |
| 1630 | &expected, &ploss); |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1631 | jitter = mgcp_state_calc_jitter(&endp->net_state); |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1632 | |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1633 | nchars = snprintf(msg, size, |
| 1634 | "\r\nP: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1635 | endp->bts_end.packets, endp->bts_end.octets, |
| 1636 | endp->net_end.packets, endp->net_end.octets, |
| 1637 | ploss, jitter); |
| 1638 | if (nchars < 0 || nchars >= size) |
| 1639 | goto truncate; |
| 1640 | |
| 1641 | msg += nchars; |
| 1642 | size -= nchars; |
| 1643 | |
| 1644 | /* Error Counter */ |
| 1645 | snprintf(msg, size, |
| 1646 | "\r\nX-Osmo-CP: EC TIS=%u, TOS=%u, TIR=%u, TOR=%u", |
| 1647 | endp->net_state.in_stream.err_ts_counter, |
| 1648 | endp->net_state.out_stream.err_ts_counter, |
| 1649 | endp->bts_state.in_stream.err_ts_counter, |
| 1650 | endp->bts_state.out_stream.err_ts_counter); |
| 1651 | truncate: |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1652 | msg[size - 1] = '\0'; |
| 1653 | } |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1654 | |
| 1655 | int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os, |
| 1656 | uint32_t *pr, uint32_t *_or, int *loss, uint32_t *jitter) |
| 1657 | { |
| 1658 | char *line, *save; |
| 1659 | int rc; |
| 1660 | |
| 1661 | /* initialize with bad values */ |
| 1662 | *ps = *os = *pr = *_or = *jitter = UINT_MAX; |
| 1663 | *loss = INT_MAX; |
| 1664 | |
| 1665 | |
| 1666 | line = strtok_r((char *) msg->l2h, "\r\n", &save); |
| 1667 | if (!line) |
| 1668 | return -1; |
| 1669 | |
| 1670 | /* this can only parse the message that is created above... */ |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 1671 | for_each_non_empty_line(line, save) { |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1672 | switch (line[0]) { |
| 1673 | case 'P': |
| 1674 | rc = sscanf(line, "P: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1675 | ps, os, pr, _or, loss, jitter); |
| 1676 | return rc == 6 ? 0 : -1; |
| 1677 | } |
| 1678 | } |
| 1679 | |
| 1680 | return -1; |
| 1681 | } |