Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 1 | /* A Media Gateway Control Protocol Media Gateway: RFC 3435 */ |
| 2 | /* The protocol implementation */ |
| 3 | |
| 4 | /* |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 5 | * (C) 2009-2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 6 | * (C) 2009-2011 by On-Waves |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 10 | * it under the terms of the GNU Affero General Public License as published by |
| 11 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 17 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 18 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * You should have received a copy of the GNU Affero General Public License |
| 20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <time.h> |
| 29 | #include <limits.h> |
| 30 | #include <unistd.h> |
| 31 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 32 | #include <osmocom/core/msgb.h> |
| 33 | #include <osmocom/core/talloc.h> |
| 34 | #include <osmocom/core/select.h> |
Holger Hans Peter Freyther | 16b7f5c | 2011-02-28 22:06:47 +0100 | [diff] [blame] | 35 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 36 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 38 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 39 | #define for_each_line(input, line, save) \ |
| 40 | for (line = strtok_r(input, "\r\n", &save); line; \ |
| 41 | line = strtok_r(NULL, "\r\n", &save)) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 42 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 43 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 44 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 45 | struct mgcp_request { |
| 46 | char *name; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 47 | struct msgb *(*handle_request) (struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 48 | char *debug_name; |
| 49 | }; |
| 50 | |
| 51 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 52 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 53 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 54 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg); |
| 55 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg); |
| 56 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg); |
| 57 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 58 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 59 | static struct msgb *handle_noti_req(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 60 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 61 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 62 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 63 | |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 64 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 65 | { |
| 66 | int i; |
| 67 | |
| 68 | /* use the call id */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 69 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 70 | |
| 71 | /* handle wrap around */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 72 | if (cfg->last_call_id == CI_UNUSED) |
| 73 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 74 | |
| 75 | /* callstack can only be of size number_of_endpoints */ |
| 76 | /* verify that the call id is free, e.g. in case of overrun */ |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 77 | for (i = 1; i < cfg->trunk.number_endpoints; ++i) |
| 78 | if (cfg->trunk.endpoints[i].ci == cfg->last_call_id) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 79 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 80 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 81 | return cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 82 | } |
| 83 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 84 | /* |
| 85 | * array of function pointers for handling various |
| 86 | * messages. In the future this might be binary sorted |
| 87 | * for performance reasons. |
| 88 | */ |
| 89 | static const struct mgcp_request mgcp_requests [] = { |
| 90 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 91 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 92 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 93 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 94 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 95 | |
| 96 | /* SPEC extension */ |
| 97 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 98 | }; |
| 99 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 100 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 101 | { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 102 | struct msgb *msg; |
| 103 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 104 | if (!msg) |
| 105 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 106 | |
| 107 | return msg; |
| 108 | } |
| 109 | |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 110 | struct msgb *mgcp_create_response_with_data(int code, const char *txt, |
| 111 | const char *msg, const char *trans, |
| 112 | const char *data) |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 113 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 114 | int len; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 115 | struct msgb *res; |
| 116 | |
| 117 | res = mgcp_msgb_alloc(); |
| 118 | if (!res) |
| 119 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 120 | |
| 121 | if (data) { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 122 | len = snprintf((char *) res->data, 2048, "%d %s%s\r\n%s", code, trans, txt, data); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 123 | } else { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 124 | len = snprintf((char *) res->data, 2048, "%d %s%s\r\n", code, trans, txt); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 125 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 126 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 127 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | 63f2db2 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 128 | LOGP(DMGCP, LOGL_DEBUG, "Sending response: code: %d for '%s'\n", code, res->l2h); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 129 | return res; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 130 | } |
| 131 | |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 132 | static struct msgb *create_ok_response(int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 133 | { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 134 | return mgcp_create_response_with_data(code, " OK", msg, trans, NULL); |
| 135 | } |
| 136 | |
| 137 | static struct msgb *create_err_response(int code, const char *msg, const char *trans) |
| 138 | { |
| 139 | return mgcp_create_response_with_data(code, " FAIL", msg, trans, NULL); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 140 | } |
| 141 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 142 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 143 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 144 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 145 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 146 | char sdp_record[4096]; |
| 147 | |
| 148 | if (!addr) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 149 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 150 | |
| 151 | snprintf(sdp_record, sizeof(sdp_record) - 1, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 152 | "I: %u\n\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 153 | "v=0\r\n" |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 154 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 155 | "c=IN IP4 %s\r\n" |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 156 | "t=0 0\r\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 157 | "m=audio %d RTP/AVP %d\r\n" |
| 158 | "a=rtpmap:%d %s\r\n", |
Holger Hans Peter Freyther | c7e49d3 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 159 | endp->ci, endp->ci, addr, addr, |
| 160 | endp->net_end.local_port, endp->bts_end.payload_type, |
| 161 | endp->bts_end.payload_type, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 162 | return mgcp_create_response_with_data(200, " OK", msg, trans_id, sdp_record); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 163 | } |
| 164 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 165 | /* |
| 166 | * handle incoming messages: |
| 167 | * - this can be a command (four letters, space, transaction id) |
| 168 | * - or a response (three numbers, space, transaction id) |
| 169 | */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 170 | struct msgb *mgcp_handle_message(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 171 | { |
| 172 | int code; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 173 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 174 | |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 175 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 176 | LOGP(DMGCP, LOGL_ERROR, "mgs too short: %d\n", msg->len); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 177 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 181 | if (sscanf((const char *)&msg->l2h[0], "%3d %*s", &code) == 1) { |
Holger Hans Peter Freyther | 63f2db2 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 182 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 183 | } else { |
| 184 | int i, handled = 0; |
| 185 | msg->l3h = &msg->l2h[4]; |
| 186 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 187 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 188 | handled = 1; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 189 | resp = mgcp_requests[i].handle_request(cfg, msg); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 190 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 191 | } |
| 192 | if (!handled) { |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 193 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 194 | } |
| 195 | } |
| 196 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 197 | return resp; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 198 | } |
| 199 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 200 | /** |
| 201 | * We have a null terminated string with the endpoint name here. We only |
| 202 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 203 | * seen on the trunk side. |
| 204 | */ |
| 205 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 206 | const char *mgcp) |
| 207 | { |
| 208 | char *rest = NULL; |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 209 | struct mgcp_trunk_config *tcfg; |
| 210 | int trunk, endp; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 211 | |
| 212 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 213 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 214 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | endp = strtoul(rest + 1, &rest, 10); |
| 219 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 220 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 221 | return NULL; |
| 222 | } |
| 223 | |
| 224 | /* signalling is on timeslot 1 */ |
| 225 | if (endp == 1) |
| 226 | return NULL; |
| 227 | |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 228 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 229 | if (!tcfg) { |
| 230 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | if (!tcfg->endpoints) { |
| 235 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 236 | return NULL; |
| 237 | } |
| 238 | |
| 239 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 240 | LOGP(DMGCP, LOGL_ERROR, "Failed to find endpoint '%s'\n", mgcp); |
Holger Hans Peter Freyther | 45c2184 | 2011-01-07 11:36:54 +0100 | [diff] [blame] | 241 | return NULL; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 242 | } |
| 243 | |
Holger Hans Peter Freyther | 74e6111 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 244 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 245 | } |
| 246 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 247 | static struct mgcp_endpoint *find_endpoint(struct mgcp_config *cfg, const char *mgcp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 248 | { |
| 249 | char *endptr = NULL; |
| 250 | unsigned int gw = INT_MAX; |
| 251 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 252 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 253 | return find_e1_endpoint(cfg, mgcp); |
| 254 | } else { |
| 255 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 256 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 257 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 258 | } |
| 259 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 260 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 261 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 262 | } |
| 263 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 264 | /** |
| 265 | * @returns 0 when the status line was complete and transaction_id and |
| 266 | * endp out parameters are set. |
| 267 | */ |
| 268 | static int mgcp_analyze_header(struct mgcp_config *cfg, char *data, |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 269 | const char **transaction_id, struct mgcp_endpoint **endp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 270 | { |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 271 | int i = 0; |
| 272 | char *elem, *save; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 273 | |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 274 | *transaction_id = "000000"; |
| 275 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 276 | for (elem = strtok_r(data, " ", &save); elem; |
| 277 | elem = strtok_r(NULL, " ", &save)) { |
| 278 | switch (i) { |
| 279 | case 0: |
| 280 | *transaction_id = elem; |
| 281 | break; |
| 282 | case 1: |
| 283 | if (endp) { |
| 284 | *endp = find_endpoint(cfg, elem); |
| 285 | if (!*endp) { |
| 286 | LOGP(DMGCP, LOGL_ERROR, |
| 287 | "Unable to find Endpoint `%s'\n", |
| 288 | elem); |
| 289 | return -1; |
| 290 | } |
| 291 | } |
| 292 | break; |
| 293 | case 2: |
| 294 | if (strcmp("MGCP", elem)) { |
| 295 | LOGP(DMGCP, LOGL_ERROR, |
| 296 | "MGCP header parsing error\n"); |
| 297 | return -1; |
| 298 | } |
| 299 | break; |
| 300 | case 3: |
| 301 | if (strcmp("1.0", elem)) { |
| 302 | LOGP(DMGCP, LOGL_ERROR, "MGCP version `%s' " |
| 303 | "not supported\n", elem); |
| 304 | return -1; |
| 305 | } |
| 306 | break; |
| 307 | } |
| 308 | i++; |
| 309 | } |
| 310 | |
| 311 | if (i != 4) { |
| 312 | LOGP(DMGCP, LOGL_ERROR, "MGCP status line too short.\n"); |
| 313 | *transaction_id = "000000"; |
| 314 | *endp = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 315 | return -1; |
| 316 | } |
| 317 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 318 | return 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 322 | const char *callid) |
| 323 | { |
| 324 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 325 | LOGP(DMGCP, LOGL_ERROR, "CallIDs does not match on 0x%x. '%s' != '%s'\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 326 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 327 | return -1; |
| 328 | } |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 334 | const char *_ci) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 335 | { |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 336 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 337 | |
| 338 | if (ci != endp->ci) { |
| 339 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 340 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 341 | return -1; |
| 342 | } |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 347 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 348 | { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 349 | int found; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 350 | const char *trans_id; |
| 351 | struct mgcp_endpoint *endp; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 352 | char *data = strtok((char *) msg->l3h, "\r\n"); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 353 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 354 | found = mgcp_analyze_header(cfg, data, &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 355 | if (found != 0) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 356 | return create_err_response(500, "AUEP", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 357 | else |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 358 | return create_ok_response(200, "AUEP", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 359 | } |
| 360 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 361 | static int parse_conn_mode(const char *msg, int *conn_mode) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 362 | { |
| 363 | int ret = 0; |
| 364 | if (strcmp(msg, "recvonly") == 0) |
| 365 | *conn_mode = MGCP_CONN_RECV_ONLY; |
| 366 | else if (strcmp(msg, "sendrecv") == 0) |
| 367 | *conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | e02860a | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 368 | else if (strcmp(msg, "sendonly") == 0) |
| 369 | *conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 98a3877 | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 370 | else if (strcmp(msg, "loopback") == 0) |
| 371 | *conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 372 | else { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 373 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 374 | ret = -1; |
| 375 | } |
| 376 | |
| 377 | return ret; |
| 378 | } |
| 379 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 380 | static int allocate_port(struct mgcp_endpoint *endp, struct mgcp_rtp_end *end, |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 381 | struct mgcp_port_range *range, |
| 382 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 383 | { |
| 384 | int i; |
| 385 | |
| 386 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 387 | end->local_alloc = PORT_ALLOC_STATIC; |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | /* attempt to find a port */ |
| 392 | for (i = 0; i < 200; ++i) { |
| 393 | int rc; |
| 394 | |
| 395 | if (range->last_port >= range->range_end) |
| 396 | range->last_port = range->range_start; |
| 397 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 398 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 399 | |
| 400 | range->last_port += 2; |
| 401 | if (rc == 0) { |
| 402 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | } |
| 407 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 408 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 409 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 410 | return -1; |
| 411 | } |
| 412 | |
| 413 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 414 | { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 415 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 416 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 417 | return -1; |
| 418 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 419 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 420 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 421 | mgcp_rtp_end_reset(&endp->net_end); |
| 422 | return -1; |
| 423 | } |
| 424 | |
Holger Hans Peter Freyther | 6990687 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 425 | if (endp->cfg->transcoder_ip && endp->tcfg->trunk_type == MGCP_TRUNK_VIRTUAL) { |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 426 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 427 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 428 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 429 | mgcp_rtp_end_reset(&endp->net_end); |
| 430 | mgcp_rtp_end_reset(&endp->bts_end); |
| 431 | return -1; |
| 432 | } |
| 433 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 434 | if (allocate_port(endp, &endp->trans_bts, |
| 435 | &endp->cfg->transcoder_ports, |
| 436 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 437 | mgcp_rtp_end_reset(&endp->net_end); |
| 438 | mgcp_rtp_end_reset(&endp->bts_end); |
| 439 | mgcp_rtp_end_reset(&endp->trans_net); |
| 440 | return -1; |
| 441 | } |
| 442 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 443 | /* remember that we have set up transcoding */ |
| 444 | endp->is_transcoded = 1; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 445 | } |
| 446 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 447 | return 0; |
| 448 | } |
| 449 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 450 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 451 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 452 | const char *trans_id; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 453 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 454 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 455 | int error_code = 400; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 456 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 457 | const char *local_options = NULL; |
| 458 | const char *callid = NULL; |
| 459 | const char *mode = NULL; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 460 | char *line, *save; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 461 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 462 | /* parse CallID C: and LocalParameters L: */ |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 463 | for_each_line((char *) msg->l3h, line, save) { |
| 464 | /* skip first line */ |
| 465 | if (line == (char *) msg->l3h) { |
| 466 | int found = mgcp_analyze_header(cfg, line, &trans_id, &endp); |
| 467 | if (found != 0) |
| 468 | return create_err_response(510, "CRCX", trans_id); |
| 469 | continue; |
| 470 | } |
| 471 | |
| 472 | switch (line[0]) { |
| 473 | case 'L': |
| 474 | local_options = (const char *) line + 3; |
| 475 | break; |
| 476 | case 'C': |
| 477 | callid = (const char *) line + 3; |
| 478 | break; |
| 479 | case 'M': |
| 480 | mode = (const char *) line + 3; |
| 481 | break; |
| 482 | default: |
| 483 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 484 | *line, *line, ENDPOINT_NUMBER(endp)); |
| 485 | break; |
| 486 | } |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 487 | } |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 488 | |
| 489 | tcfg = endp->tcfg; |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 490 | |
| 491 | /* Check required data */ |
| 492 | if (!callid || !mode) { |
| 493 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 494 | ENDPOINT_NUMBER(endp)); |
| 495 | return create_err_response(400, "CRCX", trans_id); |
| 496 | } |
| 497 | |
| 498 | /* this appears to be a retransmission, maybe check trans id */ |
| 499 | if (endp->allocated && |
| 500 | memcmp(endp->callid, callid, strlen(endp->callid)) == 0) |
| 501 | return create_response_with_sdp(endp, "CRCX", trans_id); |
| 502 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 503 | if (endp->allocated) { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 504 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 505 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 506 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 32d4e50 | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 507 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 869e38e | 2010-08-06 17:54:27 +0800 | [diff] [blame] | 508 | if (cfg->realloc_cb) |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 509 | cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 510 | } else { |
| 511 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 512 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 513 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 514 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 515 | } |
| 516 | |
Holger Hans Peter Freyther | 3488c3d | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 517 | /* copy some parameters */ |
| 518 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 519 | |
| 520 | if (local_options) |
| 521 | endp->local_options = talloc_strdup(tcfg->endpoints, local_options); |
| 522 | |
| 523 | if (parse_conn_mode(mode, &endp->conn_mode) != 0) { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 524 | error_code = 517; |
| 525 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 526 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 527 | |
| 528 | /* initialize */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 529 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 530 | |
| 531 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 532 | memset(&endp->net_end.addr, 0, sizeof(endp->net_end.addr)); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 533 | |
| 534 | /* bind to the port now */ |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 535 | if (allocate_ports(endp) != 0) |
| 536 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 537 | |
| 538 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 539 | endp->ci = generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 540 | if (endp->ci == CI_UNUSED) |
| 541 | goto error2; |
| 542 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 543 | endp->allocated = 1; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 544 | endp->bts_end.payload_type = tcfg->audio_payload; |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 545 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 546 | /* policy CB */ |
| 547 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 548 | switch (cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 549 | case MGCP_POLICY_REJECT: |
| 550 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 551 | ENDPOINT_NUMBER(endp)); |
| 552 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 553 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 554 | break; |
| 555 | case MGCP_POLICY_DEFER: |
| 556 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 557 | create_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 558 | return NULL; |
| 559 | break; |
| 560 | case MGCP_POLICY_CONT: |
| 561 | /* just continue */ |
| 562 | break; |
| 563 | } |
| 564 | } |
| 565 | |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 566 | LOGP(DMGCP, LOGL_DEBUG, "Creating endpoint on: 0x%x CI: %u port: %u/%u\n", |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 567 | ENDPOINT_NUMBER(endp), endp->ci, |
| 568 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 569 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 570 | cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 77f7afe | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 571 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 572 | create_transcoder(endp); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 573 | return create_response_with_sdp(endp, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 574 | error2: |
Holger Hans Peter Freyther | 414bf40 | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 575 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 576 | LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 577 | return create_err_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 578 | } |
| 579 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 580 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 581 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 582 | const char *trans_id; |
| 583 | struct mgcp_endpoint *endp; |
| 584 | int error_code = 500; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 585 | int silent = 0; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 586 | char *line, *save; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 587 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 588 | for_each_line((char *) msg->l3h, line, save) { |
| 589 | /* skip first line */ |
| 590 | if (line == (char *) msg->l3h) { |
| 591 | int found = mgcp_analyze_header(cfg, line, &trans_id, |
| 592 | &endp); |
| 593 | if (found != 0) |
| 594 | return create_err_response(510, "MDCX", |
| 595 | trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 596 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 597 | if (endp->ci == CI_UNUSED) { |
| 598 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 599 | "holding a connection. 0x%x\n", |
| 600 | ENDPOINT_NUMBER(endp)); |
| 601 | return create_err_response(400, "MDCX", trans_id); |
| 602 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 603 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 604 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 605 | switch (line[0]) { |
| 606 | case 'C': { |
| 607 | if (verify_call_id(endp, line + 3) != 0) |
| 608 | goto error3; |
| 609 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 610 | } |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 611 | case 'I': { |
| 612 | if (verify_ci(endp, line + 3) != 0) |
| 613 | goto error3; |
| 614 | break; |
| 615 | } |
| 616 | case 'L': |
| 617 | /* skip */ |
| 618 | break; |
| 619 | case 'M': |
| 620 | if (parse_conn_mode(line + 3, &endp->conn_mode) != 0) { |
| 621 | error_code = 517; |
| 622 | goto error3; |
| 623 | } |
| 624 | endp->orig_mode = endp->conn_mode; |
| 625 | break; |
| 626 | case 'Z': |
| 627 | silent = strcmp("noanswer", line + 3) == 0; |
| 628 | break; |
| 629 | case '\0': |
| 630 | /* SDP file begins */ |
| 631 | break; |
| 632 | case 'a': |
| 633 | case 'o': |
| 634 | case 's': |
| 635 | case 't': |
| 636 | case 'v': |
| 637 | /* skip these SDP attributes */ |
| 638 | break; |
| 639 | case 'm': { |
| 640 | int port; |
| 641 | int payload; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 642 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 643 | if (sscanf(line, "m=audio %d RTP/AVP %d", &port, &payload) == 2) { |
| 644 | endp->net_end.rtp_port = htons(port); |
| 645 | endp->net_end.rtcp_port = htons(port + 1); |
| 646 | endp->net_end.payload_type = payload; |
| 647 | } |
| 648 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 649 | } |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 650 | case 'c': { |
| 651 | char ipv4[16]; |
| 652 | |
| 653 | if (sscanf(line, "c=IN IP4 %15s", ipv4) == 1) { |
| 654 | inet_aton(ipv4, &endp->net_end.addr); |
| 655 | } |
| 656 | break; |
| 657 | } |
| 658 | default: |
| 659 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 660 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 661 | break; |
| 662 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 663 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 664 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 665 | /* policy CB */ |
| 666 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 667 | switch (cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 668 | case MGCP_POLICY_REJECT: |
| 669 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 670 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 671 | if (silent) |
| 672 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 673 | return create_err_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 674 | break; |
| 675 | case MGCP_POLICY_DEFER: |
| 676 | /* stop processing */ |
| 677 | return NULL; |
| 678 | break; |
| 679 | case MGCP_POLICY_CONT: |
| 680 | /* just continue */ |
| 681 | break; |
| 682 | } |
| 683 | } |
| 684 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 685 | /* modify */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 686 | LOGP(DMGCP, LOGL_DEBUG, "Modified endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 687 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 688 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 689 | cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 690 | if (silent) |
| 691 | goto out_silent; |
| 692 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 693 | return create_response_with_sdp(endp, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 694 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 695 | error3: |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 696 | return create_err_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 697 | |
| 698 | |
| 699 | out_silent: |
| 700 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 701 | } |
| 702 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 703 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 704 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 705 | const char *trans_id; |
| 706 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 707 | int error_code = 400; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 708 | int silent = 0; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 709 | char *line, *save; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 710 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 711 | for_each_line((char *) msg->l3h, line, save) { |
| 712 | /* skip first line */ |
| 713 | if ((char *) msg->l3h == line) { |
| 714 | int found = mgcp_analyze_header(cfg, line, &trans_id, |
| 715 | &endp); |
| 716 | if (found != 0) |
| 717 | return create_err_response(error_code, "DLCX", |
| 718 | trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 719 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 720 | if (!endp->allocated) { |
| 721 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not " |
| 722 | "used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 723 | return create_err_response(400, "DLCX", |
| 724 | trans_id); |
| 725 | } |
| 726 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 727 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 728 | switch (line[0]) { |
| 729 | case 'C': |
| 730 | if (verify_call_id(endp, line + 3) != 0) |
| 731 | goto error3; |
| 732 | break; |
| 733 | case 'I': |
| 734 | if (verify_ci(endp, line + 3) != 0) |
| 735 | goto error3; |
| 736 | break; |
| 737 | case 'Z': |
| 738 | silent = strcmp("noanswer", line + 3) == 0; |
| 739 | break; |
| 740 | default: |
| 741 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 742 | line[0], line[0], ENDPOINT_NUMBER(endp)); |
| 743 | break; |
| 744 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 745 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 746 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 747 | /* policy CB */ |
| 748 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 749 | switch (cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) { |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 750 | case MGCP_POLICY_REJECT: |
| 751 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 752 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 753 | if (silent) |
| 754 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 755 | return create_err_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 756 | break; |
| 757 | case MGCP_POLICY_DEFER: |
| 758 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 759 | delete_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 760 | return NULL; |
| 761 | break; |
| 762 | case MGCP_POLICY_CONT: |
| 763 | /* just continue */ |
| 764 | break; |
| 765 | } |
| 766 | } |
| 767 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 768 | /* free the connection */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 769 | LOGP(DMGCP, LOGL_DEBUG, "Deleted endpoint on: 0x%x Server: %s:%u\n", |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 770 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 771 | |
| 772 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 773 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 774 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 775 | cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 776 | |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 777 | if (silent) |
| 778 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 779 | return create_ok_response(250, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 780 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 781 | error3: |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 782 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 783 | |
| 784 | out_silent: |
| 785 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 786 | } |
| 787 | |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 788 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg) |
| 789 | { |
Holger Hans Peter Freyther | 74db774 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 790 | const char *trans_id; |
| 791 | struct mgcp_endpoint *endp; |
| 792 | int found; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 793 | char *data = strtok((char *) msg->l3h, "\r\n"); |
Holger Hans Peter Freyther | 74db774 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 794 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 795 | found = mgcp_analyze_header(cfg, data, &trans_id, &endp); |
Holger Hans Peter Freyther | 74db774 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 796 | if (found != 0) { |
| 797 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 798 | return NULL; |
| 799 | } |
| 800 | |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 801 | if (cfg->reset_cb) |
Holger Hans Peter Freyther | 74db774 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 802 | cfg->reset_cb(endp->tcfg); |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 803 | return NULL; |
| 804 | } |
| 805 | |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 806 | /* |
| 807 | * This can request like DTMF detection and forward, fax detection... it |
| 808 | * can also request when the notification should be send and such. We don't |
| 809 | * do this right now. |
| 810 | */ |
| 811 | static struct msgb *handle_noti_req(struct mgcp_config *cfg, struct msgb *msg) |
| 812 | { |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 813 | const char *trans_id; |
| 814 | struct mgcp_endpoint *endp; |
| 815 | int found; |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 816 | char *data = strtok((char *) msg->l3h, "\r\n"); |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 817 | |
Harald Welte | ae19972 | 2012-01-27 12:31:36 +0100 | [diff] [blame] | 818 | found = mgcp_analyze_header(cfg, data, &trans_id, &endp); |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 819 | if (found != 0) |
| 820 | return create_err_response(400, "RQNT", trans_id); |
| 821 | |
| 822 | if (!endp->allocated) { |
| 823 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 824 | return create_err_response(400, "RQNT", trans_id); |
| 825 | } |
| 826 | return create_ok_response(200, "RQNT", trans_id); |
| 827 | } |
| 828 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 829 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 830 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 831 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 832 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 833 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 834 | if (!cfg) { |
| 835 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 836 | return NULL; |
| 837 | } |
| 838 | |
| 839 | cfg->source_port = 2427; |
| 840 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 841 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 842 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 15e7389 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 843 | |
| 844 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 845 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 846 | |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 847 | /* default trunk handling */ |
| 848 | cfg->trunk.cfg = cfg; |
| 849 | cfg->trunk.trunk_nr = 0; |
| 850 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 851 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 852 | cfg->trunk.audio_payload = 126; |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 853 | cfg->trunk.omit_rtcp = 0; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 854 | |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 855 | INIT_LLIST_HEAD(&cfg->trunks); |
| 856 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 857 | return cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 858 | } |
| 859 | |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 860 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 861 | { |
| 862 | struct mgcp_trunk_config *trunk; |
| 863 | |
| 864 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 865 | if (!trunk) { |
| 866 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 867 | return NULL; |
| 868 | } |
| 869 | |
| 870 | trunk->cfg = cfg; |
| 871 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 872 | trunk->trunk_nr = nr; |
| 873 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 874 | trunk->audio_payload = 126; |
| 875 | trunk->number_endpoints = 33; |
Holger Hans Peter Freyther | a8090d5 | 2012-05-11 13:00:45 +0200 | [diff] [blame] | 876 | trunk->omit_rtcp = 0; |
Holger Hans Peter Freyther | 0e939fe | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 877 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 878 | return trunk; |
| 879 | } |
| 880 | |
| 881 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 882 | { |
| 883 | struct mgcp_trunk_config *trunk; |
| 884 | |
| 885 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 886 | if (trunk->trunk_nr == index) |
| 887 | return trunk; |
| 888 | |
| 889 | return NULL; |
| 890 | } |
| 891 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 892 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 893 | { |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 894 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 895 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 896 | end->local_port = 0; |
| 897 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 898 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 899 | end->packets = 0; |
| 900 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 901 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 902 | end->payload_type = -1; |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 903 | end->local_alloc = -1; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 904 | } |
| 905 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 906 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 907 | { |
| 908 | mgcp_rtp_end_reset(end); |
| 909 | end->rtp.fd = -1; |
| 910 | end->rtcp.fd = -1; |
| 911 | } |
| 912 | |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 913 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 914 | { |
| 915 | int i; |
| 916 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 917 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 918 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 919 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 920 | tcfg->number_endpoints, "endpoints"); |
| 921 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 922 | return -1; |
| 923 | |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 924 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 925 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 1f0c5b4 | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 926 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 927 | tcfg->endpoints[i].tcfg = tcfg; |
| 928 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 929 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 930 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 931 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 932 | } |
| 933 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 934 | return 0; |
| 935 | } |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 936 | |
| 937 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 938 | { |
Holger Hans Peter Freyther | c77efdf | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 939 | LOGP(DMGCP, LOGL_DEBUG, "Deleting endpoint on: 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 89976e8 | 2010-08-03 15:01:43 +0000 | [diff] [blame] | 940 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 941 | endp->allocated = 0; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 942 | |
| 943 | if (endp->callid) { |
| 944 | talloc_free(endp->callid); |
| 945 | endp->callid = NULL; |
| 946 | } |
| 947 | |
| 948 | if (endp->local_options) { |
| 949 | talloc_free(endp->local_options); |
Holger Hans Peter Freyther | 88c6eea | 2010-03-01 18:52:04 +0100 | [diff] [blame] | 950 | endp->local_options = NULL; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 951 | } |
| 952 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 953 | mgcp_rtp_end_reset(&endp->bts_end); |
| 954 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 955 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 956 | mgcp_rtp_end_reset(&endp->trans_bts); |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 957 | endp->is_transcoded = 0; |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 958 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 959 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 960 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 961 | |
| 962 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 6357a8e | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 963 | endp->allow_patch = 0; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 964 | |
| 965 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 966 | } |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 967 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 968 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 969 | { |
| 970 | struct sockaddr_in addr; |
| 971 | |
| 972 | memset(&addr, 0, sizeof(addr)); |
| 973 | addr.sin_family = AF_INET; |
| 974 | addr.sin_addr = cfg->transcoder_in; |
| 975 | addr.sin_port = htons(2427); |
| 976 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 977 | (struct sockaddr *) &addr, sizeof(addr)); |
| 978 | } |
| 979 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 980 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 981 | const char *msg, const char *mode) |
| 982 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 983 | char buf[2096]; |
| 984 | int len; |
| 985 | |
| 986 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 987 | len = snprintf(buf, sizeof(buf), |
| 988 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 989 | "C: 4256\r\n" |
| 990 | "M: %s\r\n" |
| 991 | "\r\n" |
| 992 | "c=IN IP4 %s\r\n" |
| 993 | "m=audio %d RTP/AVP %d\r\n" |
| 994 | "a=rtpmap:%d %s\r\n", |
| 995 | msg, endpoint, mode, endp->cfg->source_addr, |
Holger Hans Peter Freyther | 88ad772 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 996 | port, endp->tcfg->audio_payload, |
| 997 | endp->tcfg->audio_payload, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 998 | |
| 999 | if (len < 0) |
| 1000 | return; |
| 1001 | |
| 1002 | buf[sizeof(buf) - 1] = '\0'; |
| 1003 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1004 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1005 | } |
| 1006 | |
| 1007 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1008 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1009 | char buf[2096]; |
| 1010 | int len; |
| 1011 | |
| 1012 | len = snprintf(buf, sizeof(buf), |
| 1013 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1014 | "C: 4256\r\n" |
| 1015 | , endpoint); |
| 1016 | |
| 1017 | if (len < 0) |
| 1018 | return; |
| 1019 | |
| 1020 | buf[sizeof(buf) - 1] = '\0'; |
| 1021 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1022 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1023 | } |
| 1024 | |
Harald Welte | 6a85705 | 2012-01-27 00:41:39 +0100 | [diff] [blame] | 1025 | static int send_agent(struct mgcp_config *cfg, const char *buf, int len) |
| 1026 | { |
| 1027 | return write(cfg->gw_fd.bfd.fd, buf, len); |
| 1028 | } |
| 1029 | |
| 1030 | int mgcp_send_reset_all(struct mgcp_config *cfg) |
| 1031 | { |
| 1032 | static const char mgcp_reset[] = { |
| 1033 | "RSIP 1 *@mgw MGCP 1.0\r\n" |
| 1034 | }; |
| 1035 | |
| 1036 | return send_agent(cfg, mgcp_reset, sizeof mgcp_reset -1); |
| 1037 | } |
| 1038 | |
| 1039 | int mgcp_send_reset_ep(struct mgcp_endpoint *endp, int endpoint) |
| 1040 | { |
| 1041 | char buf[128]; |
| 1042 | int len; |
| 1043 | |
| 1044 | len = snprintf(buf, sizeof(buf), |
| 1045 | "RSIP 39 %x@mgw MGCP 1.0\r\n" |
| 1046 | , endpoint); |
| 1047 | if (len < 0) |
| 1048 | return len; |
| 1049 | |
| 1050 | buf[sizeof(buf) - 1] = '\0'; |
| 1051 | |
| 1052 | return send_agent(endp->cfg, buf, len); |
| 1053 | } |
| 1054 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1055 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1056 | { |
| 1057 | int port; |
| 1058 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1059 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1060 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1061 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1062 | return; |
| 1063 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1064 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1065 | send_msg(endp, in_endp, endp->trans_bts.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1066 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1067 | send_msg(endp, out_endp, endp->trans_net.local_port, "MDCX", "sendrecv"); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1068 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1069 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1070 | endp->trans_bts.rtp_port = htons(port); |
| 1071 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1072 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1073 | port = rtp_calculate_port(out_endp, endp->cfg->transcoder_remote_base); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1074 | endp->trans_net.rtp_port = htons(port); |
| 1075 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1076 | } |
| 1077 | |
| 1078 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1079 | { |
| 1080 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1081 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1082 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1083 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1084 | return; |
| 1085 | |
| 1086 | send_dlcx(endp, in_endp); |
| 1087 | send_dlcx(endp, out_endp); |
| 1088 | } |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1089 | |
| 1090 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1091 | { |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1092 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | cf1c877 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1093 | return 0; |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1094 | |
| 1095 | static const char mgcp_reset[] = { |
| 1096 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1097 | }; |
| 1098 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1099 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1100 | } |