Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 5 | * (C) 2009-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2012 by On-Waves |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 0e3e88e | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <time.h> |
| 29 | #include <limits.h> |
| 30 | #include <unistd.h> |
| 31 | |
Pablo Neira Ayuso | dd5fff4 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/talloc.h> |
| 34 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 6d419f9 | 2011-02-28 22:06:47 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 36 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 38 | |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 39 | #define for_each_non_empty_line(line, save) \ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 40 | for (line = strtok_r(NULL, "\r\n", &save); line;\ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 41 | line = strtok_r(NULL, "\r\n", &save)) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 42 | |
Jacob Erlbeck | e7060c4 | 2013-11-29 13:43:44 +0100 | [diff] [blame] | 43 | #define for_each_line(line, save) \ |
| 44 | for (line = strline_r(NULL, &save); line;\ |
| 45 | line = strline_r(NULL, &save)) |
| 46 | |
| 47 | char *strline_r(char *str, char **saveptr) |
| 48 | { |
| 49 | char *result; |
| 50 | |
| 51 | if (str) |
| 52 | *saveptr = str; |
| 53 | |
| 54 | result = *saveptr; |
| 55 | |
| 56 | if (*saveptr != NULL) { |
| 57 | *saveptr = strpbrk(*saveptr, "\r\n"); |
| 58 | |
| 59 | if (*saveptr != NULL) { |
| 60 | char *eos = *saveptr; |
| 61 | |
| 62 | if ((*saveptr)[0] == '\r' && (*saveptr)[1] == '\n') |
| 63 | (*saveptr)++; |
| 64 | (*saveptr)++; |
| 65 | if ((*saveptr)[0] == '\0') |
| 66 | *saveptr = NULL; |
| 67 | |
| 68 | *eos = '\0'; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return result; |
| 73 | } |
| 74 | |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 75 | /* Assume audio frame length of 20ms */ |
| 76 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20 |
| 77 | #define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000 |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 78 | #define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20 |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 79 | #define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000 |
| 80 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 81 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 82 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 83 | struct mgcp_parse_data { |
| 84 | struct mgcp_config *cfg; |
| 85 | struct mgcp_endpoint *endp; |
| 86 | char *trans; |
| 87 | char *save; |
| 88 | int found; |
| 89 | }; |
| 90 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 91 | struct mgcp_request { |
| 92 | char *name; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 93 | struct msgb *(*handle_request) (struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 94 | char *debug_name; |
| 95 | }; |
| 96 | |
| 97 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 98 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 99 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 100 | static struct msgb *handle_audit_endpoint(struct mgcp_parse_data *data); |
| 101 | static struct msgb *handle_create_con(struct mgcp_parse_data *data); |
| 102 | static struct msgb *handle_delete_con(struct mgcp_parse_data *data); |
| 103 | static struct msgb *handle_modify_con(struct mgcp_parse_data *data); |
| 104 | static struct msgb *handle_rsip(struct mgcp_parse_data *data); |
| 105 | static struct msgb *handle_noti_req(struct mgcp_parse_data *data); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 106 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 107 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 108 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 109 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 110 | static void setup_rtp_processing(struct mgcp_endpoint *endp); |
| 111 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 112 | static int mgcp_analyze_header(struct mgcp_parse_data *parse, char *data); |
| 113 | |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 114 | static int mgcp_check_param(const struct mgcp_endpoint *endp, const char *line) |
| 115 | { |
| 116 | const size_t line_len = strlen(line); |
| 117 | if (line[0] != '\0' && line_len < 2) { |
| 118 | LOGP(DMGCP, LOGL_ERROR, |
| 119 | "Wrong MGCP option format: '%s' on 0x%x\n", |
| 120 | line, ENDPOINT_NUMBER(endp)); |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | return 1; |
| 125 | } |
| 126 | |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 127 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 128 | { |
| 129 | int i; |
| 130 | |
| 131 | /* use the call id */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 132 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 133 | |
| 134 | /* handle wrap around */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 135 | if (cfg->last_call_id == CI_UNUSED) |
| 136 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 137 | |
| 138 | /* callstack can only be of size number_of_endpoints */ |
| 139 | /* 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] | 140 | for (i = 1; i < cfg->trunk.number_endpoints; ++i) |
| 141 | if (cfg->trunk.endpoints[i].ci == cfg->last_call_id) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 142 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 143 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 144 | return cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 145 | } |
| 146 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 147 | /* |
| 148 | * array of function pointers for handling various |
| 149 | * messages. In the future this might be binary sorted |
| 150 | * for performance reasons. |
| 151 | */ |
| 152 | static const struct mgcp_request mgcp_requests [] = { |
| 153 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 154 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 155 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 156 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 157 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 158 | |
| 159 | /* SPEC extension */ |
| 160 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 161 | }; |
| 162 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 163 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 164 | { |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 165 | struct msgb *msg; |
| 166 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 167 | if (!msg) |
| 168 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 169 | |
| 170 | return msg; |
| 171 | } |
| 172 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 173 | static struct msgb *do_retransmission(const struct mgcp_endpoint *endp) |
| 174 | { |
| 175 | struct msgb *msg = mgcp_msgb_alloc(); |
| 176 | if (!msg) |
| 177 | return NULL; |
| 178 | |
| 179 | msg->l2h = msgb_put(msg, strlen(endp->last_response)); |
| 180 | memcpy(msg->l2h, endp->last_response, msgb_l2len(msg)); |
| 181 | return msg; |
| 182 | } |
| 183 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 184 | static struct msgb *create_resp(struct mgcp_endpoint *endp, int code, |
| 185 | const char *txt, const char *msg, |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 186 | const char *trans, const char *param, |
| 187 | const char *sdp) |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 188 | { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 189 | int len; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 190 | struct msgb *res; |
| 191 | |
| 192 | res = mgcp_msgb_alloc(); |
| 193 | if (!res) |
| 194 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 195 | |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 196 | len = snprintf((char *) res->data, 2048, "%d %s%s%s\r\n%s", |
| 197 | code, trans, txt, param ? param : "", sdp ? sdp : ""); |
| 198 | if (len < 0) { |
| 199 | LOGP(DMGCP, LOGL_ERROR, "Failed to sprintf MGCP response.\n"); |
| 200 | msgb_free(res); |
| 201 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 202 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 203 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 204 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 205 | LOGP(DMGCP, LOGL_DEBUG, "Generated response: code: %d for '%s'\n", code, res->l2h); |
| 206 | |
| 207 | /* |
| 208 | * Remember the last transmission per endpoint. |
| 209 | */ |
| 210 | if (endp) { |
| 211 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 212 | talloc_free(endp->last_response); |
| 213 | talloc_free(endp->last_trans); |
| 214 | endp->last_trans = talloc_strdup(tcfg->endpoints, trans); |
| 215 | endp->last_response = talloc_strndup(tcfg->endpoints, |
| 216 | (const char *) res->l2h, |
| 217 | msgb_l2len(res)); |
| 218 | } |
| 219 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 220 | return res; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 221 | } |
| 222 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 223 | static struct msgb *create_ok_resp_with_param(struct mgcp_endpoint *endp, |
| 224 | int code, const char *msg, |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 225 | const char *trans, const char *param) |
| 226 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 227 | return create_resp(endp, code, " OK", msg, trans, param, NULL); |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 228 | } |
| 229 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 230 | static struct msgb *create_ok_response(struct mgcp_endpoint *endp, |
| 231 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 232 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 233 | 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] | 234 | } |
| 235 | |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 236 | static struct msgb *create_err_response(struct mgcp_endpoint *endp, |
| 237 | int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 238 | { |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 239 | return create_resp(endp, code, " FAIL", msg, trans, NULL, NULL); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 240 | } |
| 241 | |
Holger Hans Peter Freyther | 60d02a3 | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 242 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 243 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 244 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 245 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 246 | const char *fmtp_extra = endp->bts_end.fmtp_extra; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 247 | char sdp_record[4096]; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 248 | int len; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 249 | |
| 250 | if (!addr) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 251 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 252 | |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 253 | len = snprintf(sdp_record, sizeof(sdp_record) - 1, |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 254 | "I: %u%s\n\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 255 | "v=0\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 256 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 257 | "c=IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 258 | "t=0 0\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 259 | "m=audio %d RTP/AVP %d\r\n" |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 260 | "a=rtpmap:%d %s\r\n" |
| 261 | "%s%s", |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 262 | endp->ci, endp->cfg->osmux && endp->osmux ? "\nX-Osmux: On" : "", |
| 263 | endp->ci, addr, addr, |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 264 | endp->net_end.local_port, endp->bts_end.payload_type, |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 265 | endp->bts_end.payload_type, endp->tcfg->audio_name, |
| 266 | fmtp_extra ? fmtp_extra : "", fmtp_extra ? "\r\n" : ""); |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 267 | |
| 268 | if (len < 0 || len >= sizeof(sdp_record)) |
| 269 | goto buffer_too_small; |
| 270 | |
| 271 | if (endp->bts_end.packet_duration_ms > 0 && endp->tcfg->audio_send_ptime) { |
| 272 | int nchars = snprintf(sdp_record + len, sizeof(sdp_record) - len, |
| 273 | "a=ptime:%d\r\n", |
| 274 | endp->bts_end.packet_duration_ms); |
| 275 | if (nchars < 0 || nchars >= sizeof(sdp_record) - len) |
| 276 | goto buffer_too_small; |
| 277 | |
| 278 | len += nchars; |
| 279 | } |
Holger Hans Peter Freyther | 3ba9cce | 2012-12-07 15:14:27 +0100 | [diff] [blame] | 280 | return create_resp(endp, 200, " OK", msg, trans_id, NULL, sdp_record); |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 281 | |
| 282 | buffer_too_small: |
| 283 | LOGP(DMGCP, LOGL_ERROR, "SDP buffer too small: %d (needed %d)\n", |
| 284 | sizeof(sdp_record), len); |
| 285 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 286 | } |
| 287 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 288 | /* |
| 289 | * handle incoming messages: |
| 290 | * - this can be a command (four letters, space, transaction id) |
| 291 | * - or a response (three numbers, space, transaction id) |
| 292 | */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 293 | 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] | 294 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 295 | struct mgcp_parse_data pdata; |
| 296 | int i, code, handled = 0; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 297 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 298 | char *data; |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 299 | 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] | 300 | |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 301 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | bed02ba | 2012-12-07 16:46:19 +0100 | [diff] [blame] | 302 | 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] | 303 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 304 | } |
| 305 | |
Jacob Erlbeck | 3c629c6 | 2013-12-03 17:14:44 +0100 | [diff] [blame] | 306 | /* Ensure that the msg->l2h is NUL terminated. */ |
| 307 | if (tail[-1] == '\0') |
| 308 | /* nothing to do */; |
| 309 | else if (msgb_tailroom(msg) > 0) |
| 310 | tail[0] = '\0'; |
| 311 | else if (tail[-1] == '\r' || tail[-1] == '\n') |
| 312 | tail[-1] = '\0'; |
| 313 | else { |
| 314 | LOGP(DMGCP, LOGL_ERROR, "Cannot NUL terminate MGCP message: " |
| 315 | "Length: %d, Buffer size: %d\n", |
| 316 | msgb_l2len(msg), msg->data_len); |
| 317 | return NULL; |
| 318 | } |
| 319 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 320 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 321 | 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] | 322 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 323 | return NULL; |
| 324 | } |
| 325 | |
| 326 | msg->l3h = &msg->l2h[4]; |
| 327 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 328 | |
| 329 | /* |
| 330 | * Check for a duplicate message and respond. |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 331 | */ |
| 332 | memset(&pdata, 0, sizeof(pdata)); |
| 333 | pdata.cfg = cfg; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 334 | data = strline_r((char *) msg->l3h, &pdata.save); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 335 | pdata.found = mgcp_analyze_header(&pdata, data); |
| 336 | if (pdata.endp && pdata.trans |
| 337 | && pdata.endp->last_trans |
| 338 | && strcmp(pdata.endp->last_trans, pdata.trans) == 0) { |
| 339 | return do_retransmission(pdata.endp); |
| 340 | } |
| 341 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 342 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) { |
| 343 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
| 344 | handled = 1; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 345 | resp = mgcp_requests[i].handle_request(&pdata); |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 346 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 347 | } |
| 348 | } |
| 349 | |
Holger Hans Peter Freyther | b139e2c | 2012-12-07 16:07:46 +0100 | [diff] [blame] | 350 | if (!handled) |
| 351 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
| 352 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 353 | return resp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 354 | } |
| 355 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 356 | /** |
| 357 | * We have a null terminated string with the endpoint name here. We only |
| 358 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 359 | * seen on the trunk side. |
| 360 | */ |
| 361 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 362 | const char *mgcp) |
| 363 | { |
| 364 | char *rest = NULL; |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 365 | struct mgcp_trunk_config *tcfg; |
| 366 | int trunk, endp; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 367 | |
| 368 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 369 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 370 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 371 | return NULL; |
| 372 | } |
| 373 | |
| 374 | endp = strtoul(rest + 1, &rest, 10); |
| 375 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 376 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 377 | return NULL; |
| 378 | } |
| 379 | |
| 380 | /* signalling is on timeslot 1 */ |
| 381 | if (endp == 1) |
| 382 | return NULL; |
| 383 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 384 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 385 | if (!tcfg) { |
| 386 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 387 | return NULL; |
| 388 | } |
| 389 | |
| 390 | if (!tcfg->endpoints) { |
| 391 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 392 | return NULL; |
| 393 | } |
| 394 | |
| 395 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 396 | 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] | 397 | return NULL; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 398 | } |
| 399 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 400 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 401 | } |
| 402 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 403 | 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] | 404 | { |
| 405 | char *endptr = NULL; |
| 406 | unsigned int gw = INT_MAX; |
| 407 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 408 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 409 | return find_e1_endpoint(cfg, mgcp); |
| 410 | } else { |
| 411 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 412 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 413 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 414 | } |
| 415 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 416 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 417 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 418 | } |
| 419 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 420 | /** |
| 421 | * @returns 0 when the status line was complete and transaction_id and |
| 422 | * endp out parameters are set. |
| 423 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 424 | 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] | 425 | { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 426 | int i = 0; |
Holger Hans Peter Freyther | 0b6dca7 | 2013-07-03 10:23:35 +0200 | [diff] [blame] | 427 | char *elem, *save = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 428 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 429 | pdata->trans = "000000"; |
Holger Hans Peter Freyther | 275c044 | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 430 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 431 | for (elem = strtok_r(data, " ", &save); elem; |
| 432 | elem = strtok_r(NULL, " ", &save)) { |
| 433 | switch (i) { |
| 434 | case 0: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 435 | pdata->trans = elem; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 436 | break; |
| 437 | case 1: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 438 | pdata->endp = find_endpoint(pdata->cfg, elem); |
| 439 | if (!pdata->endp) { |
| 440 | LOGP(DMGCP, LOGL_ERROR, |
| 441 | "Unable to find Endpoint `%s'\n", elem); |
| 442 | return -1; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 443 | } |
| 444 | break; |
| 445 | case 2: |
| 446 | if (strcmp("MGCP", elem)) { |
| 447 | LOGP(DMGCP, LOGL_ERROR, |
| 448 | "MGCP header parsing error\n"); |
| 449 | return -1; |
| 450 | } |
| 451 | break; |
| 452 | case 3: |
| 453 | if (strcmp("1.0", elem)) { |
| 454 | LOGP(DMGCP, LOGL_ERROR, "MGCP version `%s' " |
| 455 | "not supported\n", elem); |
| 456 | return -1; |
| 457 | } |
| 458 | break; |
| 459 | } |
| 460 | i++; |
| 461 | } |
| 462 | |
| 463 | if (i != 4) { |
| 464 | LOGP(DMGCP, LOGL_ERROR, "MGCP status line too short.\n"); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 465 | pdata->trans = "000000"; |
| 466 | pdata->endp = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 467 | return -1; |
| 468 | } |
| 469 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 470 | return 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 474 | const char *callid) |
| 475 | { |
| 476 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 477 | 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] | 478 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 479 | return -1; |
| 480 | } |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 486 | const char *_ci) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 487 | { |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 488 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 489 | |
| 490 | if (ci != endp->ci) { |
| 491 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 492 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 493 | return -1; |
| 494 | } |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 499 | 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] | 500 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 501 | if (p->found != 0) |
| 502 | return create_err_response(NULL, 500, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 503 | else |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 504 | return create_ok_response(p->endp, 200, "AUEP", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 505 | } |
| 506 | |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 507 | 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] | 508 | { |
| 509 | int ret = 0; |
| 510 | if (strcmp(msg, "recvonly") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 511 | endp->conn_mode = MGCP_CONN_RECV_ONLY; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 512 | else if (strcmp(msg, "sendrecv") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 513 | endp->conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | 0bfcbee | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 514 | else if (strcmp(msg, "sendonly") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 515 | endp->conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 0bdf20d | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 516 | else if (strcmp(msg, "loopback") == 0) |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 517 | endp->conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 518 | else { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 519 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 520 | ret = -1; |
| 521 | } |
| 522 | |
Jacob Erlbeck | f318861 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 523 | endp->net_end.output_enabled = |
| 524 | endp->conn_mode & MGCP_CONN_SEND_ONLY ? 1 : 0; |
| 525 | endp->bts_end.output_enabled = |
| 526 | endp->conn_mode & MGCP_CONN_RECV_ONLY ? 1 : 0; |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 527 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 528 | return ret; |
| 529 | } |
| 530 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 531 | 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] | 532 | struct mgcp_port_range *range, |
| 533 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 534 | { |
| 535 | int i; |
| 536 | |
| 537 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 538 | end->local_alloc = PORT_ALLOC_STATIC; |
| 539 | return 0; |
| 540 | } |
| 541 | |
| 542 | /* attempt to find a port */ |
| 543 | for (i = 0; i < 200; ++i) { |
| 544 | int rc; |
| 545 | |
| 546 | if (range->last_port >= range->range_end) |
| 547 | range->last_port = range->range_start; |
| 548 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 549 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 550 | |
| 551 | range->last_port += 2; |
| 552 | if (rc == 0) { |
| 553 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | } |
| 558 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 559 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 560 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 561 | return -1; |
| 562 | } |
| 563 | |
| 564 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 565 | { |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 566 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 567 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 568 | return -1; |
| 569 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 570 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 571 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 572 | mgcp_rtp_end_reset(&endp->net_end); |
| 573 | return -1; |
| 574 | } |
| 575 | |
Holger Hans Peter Freyther | 1b8eaf4 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 576 | 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] | 577 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 578 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 579 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 580 | mgcp_rtp_end_reset(&endp->net_end); |
| 581 | mgcp_rtp_end_reset(&endp->bts_end); |
| 582 | return -1; |
| 583 | } |
| 584 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 585 | if (allocate_port(endp, &endp->trans_bts, |
| 586 | &endp->cfg->transcoder_ports, |
| 587 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 588 | mgcp_rtp_end_reset(&endp->net_end); |
| 589 | mgcp_rtp_end_reset(&endp->bts_end); |
| 590 | mgcp_rtp_end_reset(&endp->trans_net); |
| 591 | return -1; |
| 592 | } |
| 593 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 594 | /* remember that we have set up transcoding */ |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 595 | endp->type = MGCP_RTP_TRANSCODED; |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 596 | } |
| 597 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 598 | return 0; |
| 599 | } |
| 600 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 601 | static int parse_sdp_data(struct mgcp_rtp_end *rtp, struct mgcp_parse_data *p) |
| 602 | { |
| 603 | char *line; |
| 604 | int found_media = 0; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 605 | int audio_payload = -1; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 606 | |
| 607 | for_each_line(line, p->save) { |
| 608 | switch (line[0]) { |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 609 | case 'o': |
| 610 | case 's': |
| 611 | case 't': |
| 612 | case 'v': |
| 613 | /* skip these SDP attributes */ |
| 614 | break; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 615 | case 'a': { |
| 616 | int payload; |
| 617 | int rate; |
| 618 | int channels = 1; |
| 619 | int ptime, ptime2 = 0; |
| 620 | char audio_name[64]; |
| 621 | char audio_codec[64]; |
| 622 | |
| 623 | if (audio_payload == -1) |
| 624 | break; |
| 625 | |
Holger Hans Peter Freyther | 4ffdb3c | 2014-05-28 16:44:34 +0200 | [diff] [blame] | 626 | if (sscanf(line, "a=rtpmap:%d %63s", |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 627 | &payload, audio_name) == 2) { |
| 628 | if (payload != audio_payload) |
| 629 | break; |
| 630 | |
| 631 | if (sscanf(audio_name, "%[^/]/%d/%d", |
| 632 | audio_codec, &rate, &channels) < 2) |
| 633 | break; |
| 634 | |
| 635 | rtp->rate = rate; |
| 636 | if (channels != 1) |
| 637 | LOGP(DMGCP, LOGL_NOTICE, |
| 638 | "Channels != 1 in SDP: '%s' on 0x%x\n", |
| 639 | line, ENDPOINT_NUMBER(p->endp)); |
| 640 | } else if (sscanf(line, "a=ptime:%d-%d", |
| 641 | &ptime, &ptime2) >= 1) { |
| 642 | if (ptime2 > 0 && ptime2 != ptime) |
| 643 | rtp->packet_duration_ms = 0; |
| 644 | else |
| 645 | rtp->packet_duration_ms = ptime; |
| 646 | } else if (sscanf(line, "a=maxptime:%d", &ptime2) == 1) { |
| 647 | if (ptime2 * rtp->frame_duration_den > |
| 648 | rtp->frame_duration_num * 1500) |
| 649 | /* more than 1 frame */ |
| 650 | rtp->packet_duration_ms = 0; |
| 651 | } |
| 652 | break; |
| 653 | } |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 654 | case 'm': { |
| 655 | int port; |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 656 | audio_payload = -1; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 657 | |
| 658 | if (sscanf(line, "m=audio %d RTP/AVP %d", |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 659 | &port, &audio_payload) == 2) { |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 660 | rtp->rtp_port = htons(port); |
| 661 | rtp->rtcp_port = htons(port + 1); |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 662 | rtp->payload_type = audio_payload; |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 663 | found_media = 1; |
| 664 | } |
| 665 | break; |
| 666 | } |
| 667 | case 'c': { |
| 668 | char ipv4[16]; |
| 669 | |
| 670 | if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) { |
| 671 | inet_aton(ipv4, &rtp->addr); |
| 672 | } |
| 673 | break; |
| 674 | } |
| 675 | default: |
| 676 | if (p->endp) |
| 677 | LOGP(DMGCP, LOGL_NOTICE, |
| 678 | "Unhandled SDP option: '%c'/%d on 0x%x\n", |
| 679 | line[0], line[0], ENDPOINT_NUMBER(p->endp)); |
| 680 | else |
| 681 | LOGP(DMGCP, LOGL_NOTICE, |
| 682 | "Unhandled SDP option: '%c'/%d\n", |
| 683 | line[0], line[0]); |
| 684 | break; |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | if (found_media) |
| 689 | LOGP(DMGCP, LOGL_NOTICE, |
Jacob Erlbeck | fa3fff4 | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 690 | "Got media info via SDP: port %d, payload %d, " |
| 691 | "duration %d, addr %s\n", |
| 692 | ntohs(rtp->rtp_port), rtp->payload_type, |
| 693 | rtp->packet_duration_ms, inet_ntoa(rtp->addr)); |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 694 | |
| 695 | return found_media; |
| 696 | } |
| 697 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 698 | /* Set the LCO from a string (see RFC 3435). |
| 699 | * The string is stored in the 'string' field. A NULL string is handled excatly |
| 700 | * like an empty string, the 'string' field is never NULL after this function |
| 701 | * has been called. */ |
| 702 | static void set_local_cx_options(void *ctx, struct mgcp_lco *lco, |
| 703 | const char *options) |
| 704 | { |
| 705 | char *p_opt; |
| 706 | |
| 707 | talloc_free(lco->string); |
| 708 | lco->pkt_period_min = lco->pkt_period_max = 0; |
| 709 | lco->string = talloc_strdup(ctx, options ? options : ""); |
| 710 | |
| 711 | p_opt = strstr(lco->string, "p:"); |
| 712 | if (p_opt && sscanf(p_opt, "p:%d-%d", |
| 713 | &lco->pkt_period_min, &lco->pkt_period_max) == 1) |
| 714 | lco->pkt_period_max = lco->pkt_period_min; |
| 715 | } |
| 716 | |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 717 | void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change, |
| 718 | struct mgcp_rtp_end *rtp) |
| 719 | { |
| 720 | struct mgcp_trunk_config *tcfg = endp->tcfg; |
| 721 | |
Jacob Erlbeck | 2b57b4c | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 722 | int patch_ssrc = expect_ssrc_change && tcfg->force_constant_ssrc; |
| 723 | |
Jacob Erlbeck | f12c849 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 724 | rtp->force_aligned_timing = tcfg->force_aligned_timing; |
Jacob Erlbeck | 2b57b4c | 2013-12-03 15:13:12 +0100 | [diff] [blame] | 725 | rtp->force_constant_ssrc = patch_ssrc ? 1 : 0; |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 726 | |
| 727 | LOGP(DMGCP, LOGL_DEBUG, |
| 728 | "Configuring RTP endpoint: local port %d%s%s\n", |
| 729 | ntohs(rtp->rtp_port), |
Jacob Erlbeck | f12c849 | 2013-12-18 12:54:51 +0100 | [diff] [blame] | 730 | rtp->force_aligned_timing ? ", force constant timing" : "", |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 731 | rtp->force_constant_ssrc ? ", force constant ssrc" : ""); |
| 732 | } |
| 733 | |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 734 | uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp, |
| 735 | struct mgcp_rtp_end *rtp) |
| 736 | { |
| 737 | int f = 0; |
| 738 | |
| 739 | /* Get the number of frames per channel and packet */ |
| 740 | if (rtp->frames_per_packet) |
| 741 | f = rtp->frames_per_packet; |
| 742 | else if (rtp->packet_duration_ms && rtp->frame_duration_num) { |
| 743 | int den = 1000 * rtp->frame_duration_num; |
| 744 | f = (rtp->packet_duration_ms * rtp->frame_duration_den + den/2) |
| 745 | / den; |
| 746 | } |
| 747 | |
| 748 | return rtp->rate * f * rtp->frame_duration_num / rtp->frame_duration_den; |
| 749 | } |
| 750 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 751 | 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] | 752 | { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 753 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 754 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 755 | int error_code = 400; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 756 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 757 | const char *local_options = NULL; |
| 758 | const char *callid = NULL; |
| 759 | const char *mode = NULL; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 760 | char *line; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 761 | int have_sdp = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 762 | |
| 763 | if (p->found != 0) |
| 764 | return create_err_response(NULL, 510, "CRCX", p->trans); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 765 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 766 | /* parse CallID C: and LocalParameters L: */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 767 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 768 | if (!mgcp_check_param(endp, line)) |
| 769 | continue; |
| 770 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 771 | switch (line[0]) { |
| 772 | case 'L': |
| 773 | local_options = (const char *) line + 3; |
| 774 | break; |
| 775 | case 'C': |
| 776 | callid = (const char *) line + 3; |
| 777 | break; |
| 778 | case 'M': |
| 779 | mode = (const char *) line + 3; |
| 780 | break; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 781 | case 'X': |
| 782 | if (strcmp("Osmux: on", line + 2) == 0 && |
| 783 | osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 784 | LOGP(DMGCP, LOGL_ERROR, |
| 785 | "Could not activate osmux in endpoint %d\n", |
| 786 | ENDPOINT_NUMBER(endp)); |
| 787 | } |
| 788 | break; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 789 | case '\0': |
| 790 | have_sdp = 1; |
| 791 | goto mgcp_header_done; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 792 | default: |
| 793 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 794 | *line, *line, ENDPOINT_NUMBER(endp)); |
| 795 | break; |
| 796 | } |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 797 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 798 | |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 799 | mgcp_header_done: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 800 | tcfg = p->endp->tcfg; |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 801 | |
| 802 | /* Check required data */ |
| 803 | if (!callid || !mode) { |
| 804 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 805 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 806 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 807 | } |
| 808 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 809 | if (endp->allocated) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 810 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 811 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 812 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 5c132ee | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 813 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 814 | if (p->cfg->realloc_cb) |
| 815 | p->cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 816 | } else { |
| 817 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 818 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 819 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 820 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 821 | } |
| 822 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 823 | /* copy some parameters */ |
| 824 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 825 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 826 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 827 | local_options); |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 828 | |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 829 | if (parse_conn_mode(mode, endp) != 0) { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 830 | error_code = 517; |
| 831 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 832 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 833 | |
| 834 | /* initialize */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 835 | 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] | 836 | mgcp_rtp_end_config(endp, 0, &endp->net_end); |
| 837 | mgcp_rtp_end_config(endp, 0, &endp->bts_end); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 838 | |
| 839 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 840 | 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] | 841 | |
| 842 | /* bind to the port now */ |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 843 | if (allocate_ports(endp) != 0) |
| 844 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 845 | |
| 846 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 847 | endp->ci = generate_call_id(p->cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 848 | if (endp->ci == CI_UNUSED) |
| 849 | goto error2; |
| 850 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 851 | endp->allocated = 1; |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 852 | |
| 853 | /* set up RTP media parameters */ |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 854 | endp->bts_end.payload_type = tcfg->audio_payload; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 855 | endp->bts_end.fmtp_extra = talloc_strdup(tcfg->endpoints, |
| 856 | tcfg->audio_fmtp_extra); |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 857 | if (have_sdp) { |
Jacob Erlbeck | e3440c7 | 2013-11-29 13:43:49 +0100 | [diff] [blame] | 858 | parse_sdp_data(&endp->net_end, p); |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 859 | setup_rtp_processing(endp); |
| 860 | } |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 861 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 862 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 863 | if (p->cfg->policy_cb) { |
| 864 | int rc; |
| 865 | rc = p->cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), |
| 866 | MGCP_ENDP_CRCX, p->trans); |
| 867 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 868 | case MGCP_POLICY_REJECT: |
| 869 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 870 | ENDPOINT_NUMBER(endp)); |
| 871 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 872 | return create_err_response(endp, 400, "CRCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 873 | break; |
| 874 | case MGCP_POLICY_DEFER: |
| 875 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 876 | create_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 877 | return NULL; |
| 878 | break; |
| 879 | case MGCP_POLICY_CONT: |
| 880 | /* just continue */ |
| 881 | break; |
| 882 | } |
| 883 | } |
| 884 | |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 885 | 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] | 886 | ENDPOINT_NUMBER(endp), endp->ci, |
| 887 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 888 | if (p->cfg->change_cb) |
| 889 | 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] | 890 | |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 891 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && tcfg->keepalive_interval != 0) { |
| 892 | if (endp->osmux) |
| 893 | osmux_send_dummy(endp); |
| 894 | else |
| 895 | mgcp_send_dummy(endp); |
| 896 | } |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 897 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 898 | create_transcoder(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 899 | return create_response_with_sdp(endp, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 900 | error2: |
Holger Hans Peter Freyther | 411764b | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 901 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 902 | 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] | 903 | return create_err_response(endp, error_code, "CRCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 904 | } |
| 905 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 906 | 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] | 907 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 908 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 909 | int error_code = 500; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 910 | int silent = 0, osmux = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 911 | char *line; |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 912 | const char *local_options = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 913 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 914 | if (p->found != 0) |
| 915 | return create_err_response(NULL, 510, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 916 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 917 | if (endp->ci == CI_UNUSED) { |
| 918 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 919 | "holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 920 | return create_err_response(endp, 400, "MDCX", p->trans); |
| 921 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 922 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 923 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 924 | if (!mgcp_check_param(endp, line)) |
| 925 | continue; |
| 926 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 927 | switch (line[0]) { |
| 928 | case 'C': { |
| 929 | if (verify_call_id(endp, line + 3) != 0) |
| 930 | goto error3; |
| 931 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 932 | } |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 933 | case 'I': { |
| 934 | if (verify_ci(endp, line + 3) != 0) |
| 935 | goto error3; |
| 936 | break; |
| 937 | } |
| 938 | case 'L': |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 939 | local_options = (const char *) line + 3; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 940 | break; |
| 941 | case 'M': |
Jacob Erlbeck | ecd157a | 2013-12-19 12:23:24 +0100 | [diff] [blame] | 942 | if (parse_conn_mode(line + 3, endp) != 0) { |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 943 | error_code = 517; |
| 944 | goto error3; |
| 945 | } |
| 946 | endp->orig_mode = endp->conn_mode; |
| 947 | break; |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 948 | case 'X': |
| 949 | if (strcmp("Osmux: on", line + 2) == 0) |
| 950 | osmux = 1; |
| 951 | break; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 952 | case 'Z': |
| 953 | silent = strcmp("noanswer", line + 3) == 0; |
| 954 | break; |
| 955 | case '\0': |
| 956 | /* SDP file begins */ |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 957 | parse_sdp_data(&endp->net_end, p); |
| 958 | /* This will exhaust p->save, so the loop will |
| 959 | * terminate next time. |
| 960 | */ |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 961 | break; |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 962 | default: |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 963 | 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] | 964 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 965 | break; |
| 966 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 967 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 968 | |
Pablo Neira Ayuso | 4a2f659 | 2014-02-05 18:56:17 +0100 | [diff] [blame] | 969 | /* Re-enable Osmux if we receive a MDCX, we have to set up a new |
| 970 | * RTP flow: this generates a randomly allocated RTP SSRC and sequence |
| 971 | * number. |
| 972 | */ |
| 973 | if (osmux) { |
| 974 | if (osmux_enable_endpoint(endp, OSMUX_ROLE_BSC) < 0) { |
| 975 | LOGP(DMGCP, LOGL_ERROR, |
| 976 | "Could not update osmux in endpoint %d\n", |
| 977 | ENDPOINT_NUMBER(endp)); |
| 978 | } |
| 979 | LOGP(DMGCP, LOGL_NOTICE, |
| 980 | "Re-enabling osmux in endpoint %d, we got updated\n", |
| 981 | ENDPOINT_NUMBER(endp)); |
| 982 | } |
| 983 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 984 | set_local_cx_options(endp->tcfg->endpoints, &endp->local_options, |
| 985 | local_options); |
| 986 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 987 | setup_rtp_processing(endp); |
| 988 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 989 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 990 | if (p->cfg->policy_cb) { |
| 991 | int rc; |
| 992 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 993 | MGCP_ENDP_MDCX, p->trans); |
| 994 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 995 | case MGCP_POLICY_REJECT: |
| 996 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 997 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 998 | if (silent) |
| 999 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1000 | return create_err_response(endp, 400, "MDCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1001 | break; |
| 1002 | case MGCP_POLICY_DEFER: |
| 1003 | /* stop processing */ |
| 1004 | return NULL; |
| 1005 | break; |
| 1006 | case MGCP_POLICY_CONT: |
| 1007 | /* just continue */ |
| 1008 | break; |
| 1009 | } |
| 1010 | } |
| 1011 | |
Jacob Erlbeck | e5546cd | 2013-12-03 14:43:34 +0100 | [diff] [blame] | 1012 | mgcp_rtp_end_config(endp, 1, &endp->net_end); |
| 1013 | mgcp_rtp_end_config(endp, 1, &endp->bts_end); |
| 1014 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1015 | /* modify */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 1016 | 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] | 1017 | 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] | 1018 | if (p->cfg->change_cb) |
| 1019 | p->cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1020 | |
Jacob Erlbeck | f318861 | 2014-01-16 16:50:40 +0100 | [diff] [blame] | 1021 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY && |
| 1022 | endp->tcfg->keepalive_interval != 0) |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1023 | mgcp_send_dummy(endp); |
| 1024 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1025 | if (silent) |
| 1026 | goto out_silent; |
| 1027 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1028 | return create_response_with_sdp(endp, "MDCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1029 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1030 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1031 | return create_err_response(endp, error_code, "MDCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1032 | |
| 1033 | |
| 1034 | out_silent: |
| 1035 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1036 | } |
| 1037 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1038 | 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] | 1039 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1040 | struct mgcp_endpoint *endp = p->endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 1041 | int error_code = 400; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1042 | int silent = 0; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1043 | char *line; |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1044 | char stats[1048]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1045 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1046 | if (p->found != 0) |
| 1047 | return create_err_response(NULL, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1048 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1049 | if (!p->endp->allocated) { |
| 1050 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", |
| 1051 | ENDPOINT_NUMBER(endp)); |
| 1052 | return create_err_response(endp, 400, "DLCX", p->trans); |
| 1053 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1054 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1055 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 67f103e | 2014-05-22 15:03:10 +0200 | [diff] [blame] | 1056 | if (!mgcp_check_param(endp, line)) |
| 1057 | continue; |
| 1058 | |
Harald Welte | ec4f01b | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 1059 | switch (line[0]) { |
| 1060 | case 'C': |
| 1061 | if (verify_call_id(endp, line + 3) != 0) |
| 1062 | goto error3; |
| 1063 | break; |
| 1064 | case 'I': |
| 1065 | if (verify_ci(endp, line + 3) != 0) |
| 1066 | goto error3; |
| 1067 | break; |
| 1068 | case 'Z': |
| 1069 | silent = strcmp("noanswer", line + 3) == 0; |
| 1070 | break; |
| 1071 | default: |
| 1072 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 1073 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 1074 | break; |
| 1075 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1076 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1077 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1078 | /* policy CB */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1079 | if (p->cfg->policy_cb) { |
| 1080 | int rc; |
| 1081 | rc = p->cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), |
| 1082 | MGCP_ENDP_DLCX, p->trans); |
| 1083 | switch (rc) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1084 | case MGCP_POLICY_REJECT: |
| 1085 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 1086 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1087 | if (silent) |
| 1088 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1089 | return create_err_response(endp, 400, "DLCX", p->trans); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1090 | break; |
| 1091 | case MGCP_POLICY_DEFER: |
| 1092 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1093 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 1094 | return NULL; |
| 1095 | break; |
| 1096 | case MGCP_POLICY_CONT: |
| 1097 | /* just continue */ |
| 1098 | break; |
| 1099 | } |
| 1100 | } |
| 1101 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1102 | /* free the connection */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 1103 | 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] | 1104 | 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] | 1105 | |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1106 | /* save the statistics of the current call */ |
| 1107 | mgcp_format_stats(endp, stats, sizeof(stats)); |
| 1108 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1109 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1110 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1111 | if (p->cfg->change_cb) |
| 1112 | 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] | 1113 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1114 | if (silent) |
| 1115 | goto out_silent; |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1116 | 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] | 1117 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1118 | error3: |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1119 | return create_err_response(endp, error_code, "DLCX", p->trans); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 1120 | |
| 1121 | out_silent: |
| 1122 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1123 | } |
| 1124 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1125 | static struct msgb *handle_rsip(struct mgcp_parse_data *p) |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1126 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1127 | if (p->found != 0) { |
Holger Hans Peter Freyther | 26bd848 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 1128 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 1129 | return NULL; |
| 1130 | } |
| 1131 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1132 | if (p->cfg->reset_cb) |
| 1133 | p->cfg->reset_cb(p->endp->tcfg); |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 1134 | return NULL; |
| 1135 | } |
| 1136 | |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1137 | static char extract_tone(const char *line) |
| 1138 | { |
| 1139 | const char *str = strstr(line, "D/"); |
| 1140 | if (!str) |
| 1141 | return CHAR_MAX; |
| 1142 | |
| 1143 | return str[2]; |
| 1144 | } |
| 1145 | |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1146 | /* |
| 1147 | * This can request like DTMF detection and forward, fax detection... it |
| 1148 | * can also request when the notification should be send and such. We don't |
| 1149 | * do this right now. |
| 1150 | */ |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1151 | 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] | 1152 | { |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1153 | int res = 0; |
| 1154 | char *line; |
Holger Hans Peter Freyther | a229748 | 2013-05-21 17:04:35 +0200 | [diff] [blame] | 1155 | char tone = CHAR_MAX; |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1156 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1157 | if (p->found != 0) |
| 1158 | return create_err_response(NULL, 400, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1159 | |
Jacob Erlbeck | 9cec667 | 2013-11-29 13:43:46 +0100 | [diff] [blame] | 1160 | for_each_line(line, p->save) { |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1161 | switch (line[0]) { |
| 1162 | case 'S': |
| 1163 | tone = extract_tone(line); |
| 1164 | break; |
| 1165 | } |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1166 | } |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1167 | |
| 1168 | /* we didn't see a signal request with a tone */ |
| 1169 | if (tone == CHAR_MAX) |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1170 | return create_ok_response(p->endp, 200, "RQNT", p->trans); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1171 | |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1172 | if (p->cfg->rqnt_cb) |
| 1173 | res = p->cfg->rqnt_cb(p->endp, tone); |
Holger Hans Peter Freyther | 46880c2 | 2012-11-29 12:54:22 +0100 | [diff] [blame] | 1174 | |
| 1175 | return res == 0 ? |
Holger Hans Peter Freyther | cd25695 | 2012-12-07 15:04:07 +0100 | [diff] [blame] | 1176 | create_ok_response(p->endp, 200, "RQNT", p->trans) : |
| 1177 | create_err_response(p->endp, res, "RQNT", p->trans); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 1178 | } |
| 1179 | |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1180 | static void mgcp_keepalive_timer_cb(void *_tcfg) |
| 1181 | { |
| 1182 | struct mgcp_trunk_config *tcfg = _tcfg; |
| 1183 | int i; |
| 1184 | LOGP(DMGCP, LOGL_DEBUG, "Triggered trunk %d keepalive timer.\n", |
| 1185 | tcfg->trunk_nr); |
| 1186 | |
| 1187 | if (tcfg->keepalive_interval <= 0) |
| 1188 | return; |
| 1189 | |
| 1190 | for (i = 1; i < tcfg->number_endpoints; ++i) { |
| 1191 | struct mgcp_endpoint *endp = &tcfg->endpoints[i]; |
| 1192 | if (endp->conn_mode == MGCP_CONN_RECV_ONLY) |
| 1193 | mgcp_send_dummy(endp); |
| 1194 | } |
| 1195 | |
| 1196 | LOGP(DMGCP, LOGL_DEBUG, "Rescheduling trunk %d keepalive timer.\n", |
| 1197 | tcfg->trunk_nr); |
| 1198 | osmo_timer_schedule(&tcfg->keepalive_timer, tcfg->keepalive_interval, 0); |
| 1199 | } |
| 1200 | |
| 1201 | void mgcp_trunk_set_keepalive(struct mgcp_trunk_config *tcfg, int interval) |
| 1202 | { |
| 1203 | tcfg->keepalive_interval = interval; |
| 1204 | tcfg->keepalive_timer.data = tcfg; |
| 1205 | tcfg->keepalive_timer.cb = mgcp_keepalive_timer_cb; |
| 1206 | |
| 1207 | if (interval <= 0) |
| 1208 | osmo_timer_del(&tcfg->keepalive_timer); |
| 1209 | else |
| 1210 | osmo_timer_schedule(&tcfg->keepalive_timer, |
| 1211 | tcfg->keepalive_interval, 0); |
| 1212 | } |
| 1213 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1214 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1215 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1216 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1217 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1218 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 1219 | if (!cfg) { |
| 1220 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 1221 | return NULL; |
| 1222 | } |
| 1223 | |
| 1224 | cfg->source_port = 2427; |
| 1225 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1226 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1227 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 2ea9118 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 1228 | |
| 1229 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 1230 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1231 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 1232 | cfg->rtp_processing_cb = &mgcp_rtp_processing_default; |
| 1233 | cfg->setup_rtp_processing_cb = &mgcp_setup_rtp_processing_default; |
| 1234 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1235 | /* default trunk handling */ |
| 1236 | cfg->trunk.cfg = cfg; |
| 1237 | cfg->trunk.trunk_nr = 0; |
| 1238 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 1239 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1240 | cfg->trunk.audio_payload = 126; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1241 | cfg->trunk.audio_send_ptime = 1; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1242 | cfg->trunk.omit_rtcp = 0; |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1243 | mgcp_trunk_set_keepalive(&cfg->trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1244 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1245 | INIT_LLIST_HEAD(&cfg->trunks); |
| 1246 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1247 | return cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1248 | } |
| 1249 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1250 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 1251 | { |
| 1252 | struct mgcp_trunk_config *trunk; |
| 1253 | |
| 1254 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 1255 | if (!trunk) { |
| 1256 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 1257 | return NULL; |
| 1258 | } |
| 1259 | |
| 1260 | trunk->cfg = cfg; |
| 1261 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 1262 | trunk->trunk_nr = nr; |
| 1263 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 1264 | trunk->audio_payload = 126; |
Jacob Erlbeck | e91324d | 2013-12-10 13:09:37 +0100 | [diff] [blame] | 1265 | trunk->audio_send_ptime = 1; |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1266 | trunk->number_endpoints = 33; |
Holger Hans Peter Freyther | 51ade84 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 1267 | trunk->omit_rtcp = 0; |
Jacob Erlbeck | e64bb12 | 2013-12-19 18:53:07 +0100 | [diff] [blame] | 1268 | mgcp_trunk_set_keepalive(trunk, MGCP_KEEPALIVE_ONCE); |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 1269 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 1270 | return trunk; |
| 1271 | } |
| 1272 | |
| 1273 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 1274 | { |
| 1275 | struct mgcp_trunk_config *trunk; |
| 1276 | |
| 1277 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 1278 | if (trunk->trunk_nr == index) |
| 1279 | return trunk; |
| 1280 | |
| 1281 | return NULL; |
| 1282 | } |
| 1283 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1284 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 1285 | { |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1286 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1287 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1288 | end->local_port = 0; |
| 1289 | } |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1290 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1291 | end->packets = 0; |
Holger Hans Peter Freyther | 3e45610 | 2012-09-12 11:38:37 +0200 | [diff] [blame] | 1292 | end->octets = 0; |
Jacob Erlbeck | 8c1f4b0 | 2013-12-19 12:13:32 +0100 | [diff] [blame] | 1293 | end->dropped_packets = 0; |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1294 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 1295 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1296 | end->payload_type = -1; |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 1297 | end->local_alloc = -1; |
Holger Hans Peter Freyther | 4928d1b | 2012-09-03 00:07:39 +0200 | [diff] [blame] | 1298 | talloc_free(end->fmtp_extra); |
| 1299 | end->fmtp_extra = NULL; |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 1300 | talloc_free(end->rtp_process_data); |
| 1301 | end->rtp_process_data = NULL; |
Jacob Erlbeck | ac9f6ce | 2013-11-25 15:23:35 +0100 | [diff] [blame] | 1302 | |
| 1303 | /* Set default values */ |
| 1304 | end->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM; |
| 1305 | end->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN; |
Jacob Erlbeck | d69cf60 | 2013-12-04 10:30:11 +0100 | [diff] [blame] | 1306 | end->frames_per_packet = 0; /* unknown */ |
| 1307 | end->packet_duration_ms = DEFAULT_RTP_AUDIO_PACKET_DURATION_MS; |
| 1308 | end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; |
Jacob Erlbeck | b866d3b | 2014-01-16 16:50:39 +0100 | [diff] [blame] | 1309 | end->output_enabled = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1310 | } |
| 1311 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 1312 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 1313 | { |
| 1314 | mgcp_rtp_end_reset(end); |
| 1315 | end->rtp.fd = -1; |
| 1316 | end->rtcp.fd = -1; |
| 1317 | } |
| 1318 | |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1319 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1320 | { |
| 1321 | int i; |
| 1322 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1323 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1324 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1325 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1326 | tcfg->number_endpoints, "endpoints"); |
| 1327 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 1328 | return -1; |
| 1329 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1330 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 1331 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 1332 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1333 | tcfg->endpoints[i].tcfg = tcfg; |
| 1334 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 1335 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 1336 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 1337 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1338 | } |
| 1339 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1340 | return 0; |
| 1341 | } |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1342 | |
| 1343 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 1344 | { |
Holger Hans Peter Freyther | 62d3bb7 | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 1345 | 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] | 1346 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 1347 | endp->allocated = 0; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1348 | |
Holger Hans Peter Freyther | e9564b2 | 2012-12-07 11:52:16 +0100 | [diff] [blame] | 1349 | talloc_free(endp->callid); |
| 1350 | endp->callid = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1351 | |
Jacob Erlbeck | 91cf743 | 2013-12-09 14:32:03 +0100 | [diff] [blame] | 1352 | talloc_free(endp->local_options.string); |
| 1353 | endp->local_options.string = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1354 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1355 | mgcp_rtp_end_reset(&endp->bts_end); |
| 1356 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1357 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1358 | mgcp_rtp_end_reset(&endp->trans_bts); |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1359 | endp->type = MGCP_RTP_DEFAULT; |
Holger Hans Peter Freyther | e758d95 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 1360 | |
Holger Hans Peter Freyther | 84ba528 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 1361 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 1362 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | b33ded1 | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 1363 | |
| 1364 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 8fdb95e | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 1365 | |
| 1366 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1367 | } |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1368 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1369 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 1370 | { |
| 1371 | struct sockaddr_in addr; |
| 1372 | |
| 1373 | memset(&addr, 0, sizeof(addr)); |
| 1374 | addr.sin_family = AF_INET; |
| 1375 | addr.sin_addr = cfg->transcoder_in; |
| 1376 | addr.sin_port = htons(2427); |
| 1377 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 1378 | (struct sockaddr *) &addr, sizeof(addr)); |
| 1379 | } |
| 1380 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1381 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 1382 | const char *msg, const char *mode) |
| 1383 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1384 | char buf[2096]; |
| 1385 | int len; |
| 1386 | |
| 1387 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 1388 | len = snprintf(buf, sizeof(buf), |
| 1389 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 1390 | "C: 4256\r\n" |
| 1391 | "M: %s\r\n" |
| 1392 | "\r\n" |
| 1393 | "c=IN IP4 %s\r\n" |
| 1394 | "m=audio %d RTP/AVP %d\r\n" |
| 1395 | "a=rtpmap:%d %s\r\n", |
| 1396 | msg, endpoint, mode, endp->cfg->source_addr, |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1397 | port, endp->tcfg->audio_payload, |
| 1398 | endp->tcfg->audio_payload, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1399 | |
| 1400 | if (len < 0) |
| 1401 | return; |
| 1402 | |
| 1403 | buf[sizeof(buf) - 1] = '\0'; |
| 1404 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1405 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1409 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1410 | char buf[2096]; |
| 1411 | int len; |
| 1412 | |
| 1413 | len = snprintf(buf, sizeof(buf), |
| 1414 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1415 | "C: 4256\r\n" |
| 1416 | , endpoint); |
| 1417 | |
| 1418 | if (len < 0) |
| 1419 | return; |
| 1420 | |
| 1421 | buf[sizeof(buf) - 1] = '\0'; |
| 1422 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1423 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1424 | } |
| 1425 | |
Harald Welte | ba4f8b2 | 2012-01-27 00:41:39 +0100 | [diff] [blame] | 1426 | static int send_agent(struct mgcp_config *cfg, const char *buf, int len) |
| 1427 | { |
| 1428 | return write(cfg->gw_fd.bfd.fd, buf, len); |
| 1429 | } |
| 1430 | |
| 1431 | int mgcp_send_reset_all(struct mgcp_config *cfg) |
| 1432 | { |
| 1433 | static const char mgcp_reset[] = { |
| 1434 | "RSIP 1 *@mgw MGCP 1.0\r\n" |
| 1435 | }; |
| 1436 | |
| 1437 | return send_agent(cfg, mgcp_reset, sizeof mgcp_reset -1); |
| 1438 | } |
| 1439 | |
| 1440 | int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint) |
| 1441 | { |
| 1442 | char buf[128]; |
| 1443 | int len; |
| 1444 | |
| 1445 | len = snprintf(buf, sizeof(buf), |
| 1446 | "RSIP 39 %x@mgw MGCP 1.0\r\n" |
| 1447 | , endpoint); |
| 1448 | if (len < 0) |
| 1449 | return len; |
| 1450 | |
| 1451 | buf[sizeof(buf) - 1] = '\0'; |
| 1452 | |
| 1453 | return send_agent(endp->cfg, buf, len); |
| 1454 | } |
| 1455 | |
Jacob Erlbeck | 6a16305 | 2014-03-13 14:24:52 +0100 | [diff] [blame^] | 1456 | static void setup_rtp_processing(struct mgcp_endpoint *endp) |
| 1457 | { |
| 1458 | struct mgcp_config *cfg = endp->cfg; |
| 1459 | |
| 1460 | if (endp->type != MGCP_RTP_DEFAULT) |
| 1461 | return; |
| 1462 | |
| 1463 | if (endp->conn_mode == MGCP_CONN_LOOPBACK) |
| 1464 | return; |
| 1465 | |
| 1466 | if (endp->conn_mode & MGCP_CONN_SEND_ONLY) |
| 1467 | cfg->setup_rtp_processing_cb(endp, &endp->net_end, &endp->bts_end); |
| 1468 | else |
| 1469 | cfg->setup_rtp_processing_cb(endp, &endp->net_end, NULL); |
| 1470 | |
| 1471 | if (endp->conn_mode & MGCP_CONN_RECV_ONLY) |
| 1472 | cfg->setup_rtp_processing_cb(endp, &endp->bts_end, &endp->net_end); |
| 1473 | else |
| 1474 | cfg->setup_rtp_processing_cb(endp, &endp->bts_end, NULL); |
| 1475 | } |
| 1476 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1477 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1478 | { |
| 1479 | int port; |
| 1480 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1481 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1482 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1483 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1484 | return; |
| 1485 | |
Holger Hans Peter Freyther | c9e3bc6 | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1486 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1487 | 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] | 1488 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1489 | 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] | 1490 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1491 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1492 | endp->trans_bts.rtp_port = htons(port); |
| 1493 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1494 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1495 | 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] | 1496 | endp->trans_net.rtp_port = htons(port); |
| 1497 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1498 | } |
| 1499 | |
| 1500 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1501 | { |
| 1502 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1503 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1504 | |
Pablo Neira Ayuso | a3f26c0 | 2013-07-08 05:09:46 +0200 | [diff] [blame] | 1505 | if (endp->type != MGCP_RTP_TRANSCODED) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1506 | return; |
| 1507 | |
| 1508 | send_dlcx(endp, in_endp); |
| 1509 | send_dlcx(endp, out_endp); |
| 1510 | } |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1511 | |
| 1512 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1513 | { |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1514 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | bafc987 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1515 | return 0; |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1516 | |
| 1517 | static const char mgcp_reset[] = { |
| 1518 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1519 | }; |
| 1520 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1521 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1522 | } |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1523 | |
| 1524 | void mgcp_format_stats(struct mgcp_endpoint *endp, char *msg, size_t size) |
| 1525 | { |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1526 | uint32_t expected, jitter; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1527 | int ploss; |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1528 | int nchars; |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1529 | mgcp_state_calc_loss(&endp->net_state, &endp->net_end, |
| 1530 | &expected, &ploss); |
Holger Hans Peter Freyther | 8c87a48 | 2012-10-24 21:22:47 +0200 | [diff] [blame] | 1531 | jitter = mgcp_state_calc_jitter(&endp->net_state); |
Holger Hans Peter Freyther | faa6793 | 2012-10-22 18:09:35 +0200 | [diff] [blame] | 1532 | |
Jacob Erlbeck | a2528da | 2013-11-25 12:53:28 +0100 | [diff] [blame] | 1533 | nchars = snprintf(msg, size, |
| 1534 | "\r\nP: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1535 | endp->bts_end.packets, endp->bts_end.octets, |
| 1536 | endp->net_end.packets, endp->net_end.octets, |
| 1537 | ploss, jitter); |
| 1538 | if (nchars < 0 || nchars >= size) |
| 1539 | goto truncate; |
| 1540 | |
| 1541 | msg += nchars; |
| 1542 | size -= nchars; |
| 1543 | |
| 1544 | /* Error Counter */ |
| 1545 | snprintf(msg, size, |
| 1546 | "\r\nX-Osmo-CP: EC TIS=%u, TOS=%u, TIR=%u, TOR=%u", |
| 1547 | endp->net_state.in_stream.err_ts_counter, |
| 1548 | endp->net_state.out_stream.err_ts_counter, |
| 1549 | endp->bts_state.in_stream.err_ts_counter, |
| 1550 | endp->bts_state.out_stream.err_ts_counter); |
| 1551 | truncate: |
Holger Hans Peter Freyther | 8fc6d08 | 2012-09-14 17:18:12 +0200 | [diff] [blame] | 1552 | msg[size - 1] = '\0'; |
| 1553 | } |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1554 | |
| 1555 | int mgcp_parse_stats(struct msgb *msg, uint32_t *ps, uint32_t *os, |
| 1556 | uint32_t *pr, uint32_t *_or, int *loss, uint32_t *jitter) |
| 1557 | { |
| 1558 | char *line, *save; |
| 1559 | int rc; |
| 1560 | |
| 1561 | /* initialize with bad values */ |
| 1562 | *ps = *os = *pr = *_or = *jitter = UINT_MAX; |
| 1563 | *loss = INT_MAX; |
| 1564 | |
| 1565 | |
| 1566 | line = strtok_r((char *) msg->l2h, "\r\n", &save); |
| 1567 | if (!line) |
| 1568 | return -1; |
| 1569 | |
| 1570 | /* this can only parse the message that is created above... */ |
Jacob Erlbeck | 7a6510c | 2013-11-29 13:43:43 +0100 | [diff] [blame] | 1571 | for_each_non_empty_line(line, save) { |
Holger Hans Peter Freyther | 931d698 | 2012-10-24 21:53:40 +0200 | [diff] [blame] | 1572 | switch (line[0]) { |
| 1573 | case 'P': |
| 1574 | rc = sscanf(line, "P: PS=%u, OS=%u, PR=%u, OR=%u, PL=%d, JI=%u", |
| 1575 | ps, os, pr, _or, loss, jitter); |
| 1576 | return rc == 6 ? 0 : -1; |
| 1577 | } |
| 1578 | } |
| 1579 | |
| 1580 | return -1; |
| 1581 | } |