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 | 804019a | 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 | 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 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 39 | /** |
| 40 | * Macro for tokenizing MGCP messages and SDP in one go. |
| 41 | * |
| 42 | */ |
| 43 | #define MSG_TOKENIZE_START \ |
| 44 | line_start = 0; \ |
| 45 | for (i = 0; i < msgb_l3len(msg); ++i) { \ |
| 46 | /* we have a line end */ \ |
| 47 | if (msg->l3h[i] == '\n') { \ |
| 48 | /* skip the first line */ \ |
| 49 | if (line_start == 0) { \ |
| 50 | line_start = i + 1; \ |
| 51 | continue; \ |
| 52 | } \ |
| 53 | \ |
| 54 | /* check if we have a proper param */ \ |
| 55 | if (i - line_start == 1 && msg->l3h[line_start] == '\r') { \ |
| 56 | } else if (i - line_start > 2 \ |
| 57 | && islower(msg->l3h[line_start]) \ |
| 58 | && msg->l3h[line_start + 1] == '=') { \ |
| 59 | } else if (i - line_start < 3 \ |
| 60 | || msg->l3h[line_start + 1] != ':' \ |
| 61 | || msg->l3h[line_start + 2] != ' ') \ |
| 62 | goto error; \ |
| 63 | \ |
| 64 | msg->l3h[i] = '\0'; \ |
| 65 | if (msg->l3h[i-1] == '\r') \ |
| 66 | msg->l3h[i-1] = '\0'; |
| 67 | |
| 68 | #define MSG_TOKENIZE_END \ |
| 69 | line_start = i + 1; \ |
| 70 | } \ |
| 71 | } |
| 72 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 73 | 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] | 74 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 75 | struct mgcp_request { |
| 76 | char *name; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 77 | struct msgb *(*handle_request) (struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 78 | char *debug_name; |
| 79 | }; |
| 80 | |
| 81 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 82 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 83 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 84 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg); |
| 85 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg); |
| 86 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg); |
| 87 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 88 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 89 | static struct msgb *handle_noti_req(struct mgcp_config *cfg, struct msgb *msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 90 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 91 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 92 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 93 | |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 94 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 95 | { |
| 96 | int i; |
| 97 | |
| 98 | /* use the call id */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 99 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 100 | |
| 101 | /* handle wrap around */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 102 | if (cfg->last_call_id == CI_UNUSED) |
| 103 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 104 | |
| 105 | /* callstack can only be of size number_of_endpoints */ |
| 106 | /* 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] | 107 | for (i = 1; i < cfg->trunk.number_endpoints; ++i) |
| 108 | if (cfg->trunk.endpoints[i].ci == cfg->last_call_id) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 109 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 110 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 111 | return cfg->last_call_id; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 112 | } |
| 113 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 114 | /* |
| 115 | * array of function pointers for handling various |
| 116 | * messages. In the future this might be binary sorted |
| 117 | * for performance reasons. |
| 118 | */ |
| 119 | static const struct mgcp_request mgcp_requests [] = { |
| 120 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 121 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 122 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 123 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 124 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 125 | |
| 126 | /* SPEC extension */ |
| 127 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 128 | }; |
| 129 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 130 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 131 | { |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 132 | struct msgb *msg; |
| 133 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 134 | if (!msg) |
| 135 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 136 | |
| 137 | return msg; |
| 138 | } |
| 139 | |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 140 | struct msgb *mgcp_create_response_with_data(int code, const char *txt, |
| 141 | const char *msg, const char *trans, |
| 142 | const char *data) |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 143 | { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 144 | int len; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 145 | struct msgb *res; |
| 146 | |
| 147 | res = mgcp_msgb_alloc(); |
| 148 | if (!res) |
| 149 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 150 | |
| 151 | if (data) { |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 152 | len = snprintf((char *) res->data, 2048, "%d %s%s\r\n%s", code, trans, txt, data); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 153 | } else { |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 154 | len = snprintf((char *) res->data, 2048, "%d %s%s\r\n", code, trans, txt); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 155 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 156 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 157 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | 40faed8 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 158 | LOGP(DMGCP, LOGL_DEBUG, "Sending response: code: %d for '%s'\n", code, res->l2h); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 159 | return res; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 160 | } |
| 161 | |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 162 | static struct msgb *create_ok_response(int code, const char *msg, const char *trans) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 163 | { |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 164 | return mgcp_create_response_with_data(code, " OK", msg, trans, NULL); |
| 165 | } |
| 166 | |
| 167 | static struct msgb *create_err_response(int code, const char *msg, const char *trans) |
| 168 | { |
| 169 | return mgcp_create_response_with_data(code, " FAIL", msg, trans, NULL); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 170 | } |
| 171 | |
Holger Hans Peter Freyther | 60d02a3 | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 172 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 173 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 174 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 175 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 176 | char sdp_record[4096]; |
| 177 | |
| 178 | if (!addr) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 179 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 180 | |
| 181 | snprintf(sdp_record, sizeof(sdp_record) - 1, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 182 | "I: %u\n\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 183 | "v=0\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 184 | "o=- %u 23 IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 185 | "c=IN IP4 %s\r\n" |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 186 | "t=0 0\r\n" |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 187 | "m=audio %d RTP/AVP %d\r\n" |
| 188 | "a=rtpmap:%d %s\r\n", |
Holger Hans Peter Freyther | 2e0af51 | 2011-07-20 20:43:15 +0200 | [diff] [blame] | 189 | endp->ci, endp->ci, addr, addr, |
| 190 | endp->net_end.local_port, endp->bts_end.payload_type, |
| 191 | endp->bts_end.payload_type, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 192 | return mgcp_create_response_with_data(200, " OK", msg, trans_id, sdp_record); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 193 | } |
| 194 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 195 | /* |
| 196 | * handle incoming messages: |
| 197 | * - this can be a command (four letters, space, transaction id) |
| 198 | * - or a response (three numbers, space, transaction id) |
| 199 | */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 200 | 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] | 201 | { |
| 202 | int code; |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 203 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 204 | |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 205 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 206 | LOGP(DMGCP, LOGL_ERROR, "mgs too short: %d\n", msg->len); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 207 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 211 | 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] | 212 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 213 | } else { |
| 214 | int i, handled = 0; |
| 215 | msg->l3h = &msg->l2h[4]; |
| 216 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 217 | if (strncmp(mgcp_requests[i].name, (const char *) &msg->l2h[0], 4) == 0) { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 218 | handled = 1; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 219 | resp = mgcp_requests[i].handle_request(cfg, msg); |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 220 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 221 | } |
| 222 | if (!handled) { |
Holger Hans Peter Freyther | 0421be7 | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 223 | LOGP(DMGCP, LOGL_NOTICE, "MSG with type: '%.4s' not handled\n", &msg->l2h[0]); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 224 | } |
| 225 | } |
| 226 | |
Holger Hans Peter Freyther | ad4e339 | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 227 | return resp; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /* string tokenizer for the poor */ |
| 231 | static int find_msg_pointers(struct msgb *msg, struct mgcp_msg_ptr *ptrs, int ptrs_length) |
| 232 | { |
| 233 | int i, found = 0; |
| 234 | |
| 235 | int whitespace = 1; |
| 236 | for (i = 0; i < msgb_l3len(msg) && ptrs_length > 0; ++i) { |
| 237 | /* if we have a space we found an end */ |
| 238 | if (msg->l3h[i] == ' ' || msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 239 | if (!whitespace) { |
| 240 | ++found; |
| 241 | whitespace = 1; |
| 242 | ptrs->length = i - ptrs->start - 1; |
| 243 | ++ptrs; |
| 244 | --ptrs_length; |
| 245 | } else { |
| 246 | /* skip any number of whitespace */ |
| 247 | } |
| 248 | |
| 249 | /* line end... stop */ |
| 250 | if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') |
| 251 | break; |
| 252 | } else if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 253 | /* line end, be done */ |
| 254 | break; |
| 255 | } else if (whitespace) { |
| 256 | whitespace = 0; |
| 257 | ptrs->start = i; |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | if (ptrs_length == 0) |
| 262 | return -1; |
| 263 | return found; |
| 264 | } |
| 265 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 266 | /** |
| 267 | * We have a null terminated string with the endpoint name here. We only |
| 268 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 269 | * seen on the trunk side. |
| 270 | */ |
| 271 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 272 | const char *mgcp) |
| 273 | { |
| 274 | char *rest = NULL; |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 275 | struct mgcp_trunk_config *tcfg; |
| 276 | int trunk, endp; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 277 | |
| 278 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 279 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 280 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 281 | return NULL; |
| 282 | } |
| 283 | |
| 284 | endp = strtoul(rest + 1, &rest, 10); |
| 285 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | 72026c1 | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 286 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 287 | return NULL; |
| 288 | } |
| 289 | |
| 290 | /* signalling is on timeslot 1 */ |
| 291 | if (endp == 1) |
| 292 | return NULL; |
| 293 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 294 | tcfg = mgcp_trunk_num(cfg, trunk); |
| 295 | if (!tcfg) { |
| 296 | LOGP(DMGCP, LOGL_ERROR, "The trunk %d is not declared.\n", trunk); |
| 297 | return NULL; |
| 298 | } |
| 299 | |
| 300 | if (!tcfg->endpoints) { |
| 301 | LOGP(DMGCP, LOGL_ERROR, "Endpoints of trunk %d not allocated.\n", trunk); |
| 302 | return NULL; |
| 303 | } |
| 304 | |
| 305 | if (endp < 1 || endp >= tcfg->number_endpoints) { |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 306 | 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] | 307 | return NULL; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 308 | } |
| 309 | |
Holger Hans Peter Freyther | 1d13712 | 2011-02-28 14:13:47 +0100 | [diff] [blame] | 310 | return &tcfg->endpoints[endp]; |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 311 | } |
| 312 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 313 | 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] | 314 | { |
| 315 | char *endptr = NULL; |
| 316 | unsigned int gw = INT_MAX; |
| 317 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 318 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 319 | return find_e1_endpoint(cfg, mgcp); |
| 320 | } else { |
| 321 | gw = strtoul(mgcp, &endptr, 16); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 322 | if (gw > 0 && gw < cfg->trunk.number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 323 | return &cfg->trunk.endpoints[gw]; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 324 | } |
| 325 | |
Holger Hans Peter Freyther | f0bc075 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 326 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 327 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 328 | } |
| 329 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 330 | int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg, |
| 331 | struct mgcp_msg_ptr *ptr, int size, |
| 332 | const char **transaction_id, struct mgcp_endpoint **endp) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 333 | { |
| 334 | int found; |
| 335 | |
Holger Hans Peter Freyther | 275c044 | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 336 | *transaction_id = "000000"; |
| 337 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 338 | if (size < 3) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 339 | LOGP(DMGCP, LOGL_ERROR, "Not enough space in ptr\n"); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 340 | return -1; |
| 341 | } |
| 342 | |
| 343 | found = find_msg_pointers(msg, ptr, size); |
| 344 | |
Holger Hans Peter Freyther | 275c044 | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 345 | if (found <= 3) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 346 | LOGP(DMGCP, LOGL_ERROR, "Gateway: Not enough params. Found: %d\n", found); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 347 | return -1; |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * replace the space with \0. the main method gurantess that |
| 352 | * we still have + 1 for null termination |
| 353 | */ |
| 354 | msg->l3h[ptr[3].start + ptr[3].length + 1] = '\0'; |
| 355 | msg->l3h[ptr[2].start + ptr[2].length + 1] = '\0'; |
| 356 | msg->l3h[ptr[1].start + ptr[1].length + 1] = '\0'; |
| 357 | msg->l3h[ptr[0].start + ptr[0].length + 1] = '\0'; |
| 358 | |
| 359 | if (strncmp("1.0", (const char *)&msg->l3h[ptr[3].start], 3) != 0 |
| 360 | || strncmp("MGCP", (const char *)&msg->l3h[ptr[2].start], 4) != 0) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 361 | LOGP(DMGCP, LOGL_ERROR, "Wrong MGCP version. Not handling: '%s' '%s'\n", |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 362 | (const char *)&msg->l3h[ptr[3].start], |
| 363 | (const char *)&msg->l3h[ptr[2].start]); |
| 364 | return -1; |
| 365 | } |
| 366 | |
| 367 | *transaction_id = (const char *)&msg->l3h[ptr[0].start]; |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 368 | if (endp) { |
| 369 | *endp = find_endpoint(cfg, (const char *)&msg->l3h[ptr[1].start]); |
| 370 | return *endp == NULL; |
| 371 | } |
| 372 | return 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 376 | const char *callid) |
| 377 | { |
| 378 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 379 | 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] | 380 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 381 | return -1; |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 388 | const char *_ci) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 389 | { |
Holger Hans Peter Freyther | 526b4d3 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 390 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 391 | |
| 392 | if (ci != endp->ci) { |
| 393 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 394 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 395 | return -1; |
| 396 | } |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 401 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 402 | { |
| 403 | struct mgcp_msg_ptr data_ptrs[6]; |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 404 | int found; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 405 | const char *trans_id; |
| 406 | struct mgcp_endpoint *endp; |
| 407 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 408 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 409 | if (found != 0) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 410 | return create_err_response(500, "AUEP", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 411 | else |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 412 | return create_ok_response(200, "AUEP", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 413 | } |
| 414 | |
Holger Hans Peter Freyther | dfd61a3 | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 415 | static int parse_conn_mode(const char *msg, int *conn_mode) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 416 | { |
| 417 | int ret = 0; |
| 418 | if (strcmp(msg, "recvonly") == 0) |
| 419 | *conn_mode = MGCP_CONN_RECV_ONLY; |
| 420 | else if (strcmp(msg, "sendrecv") == 0) |
| 421 | *conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | 0bfcbee | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 422 | else if (strcmp(msg, "sendonly") == 0) |
| 423 | *conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 0bdf20d | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 424 | else if (strcmp(msg, "loopback") == 0) |
| 425 | *conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 426 | else { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 427 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 428 | ret = -1; |
| 429 | } |
| 430 | |
| 431 | return ret; |
| 432 | } |
| 433 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 434 | 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] | 435 | struct mgcp_port_range *range, |
| 436 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 437 | { |
| 438 | int i; |
| 439 | |
| 440 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 441 | end->local_alloc = PORT_ALLOC_STATIC; |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* attempt to find a port */ |
| 446 | for (i = 0; i < 200; ++i) { |
| 447 | int rc; |
| 448 | |
| 449 | if (range->last_port >= range->range_end) |
| 450 | range->last_port = range->range_start; |
| 451 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 452 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 453 | |
| 454 | range->last_port += 2; |
| 455 | if (rc == 0) { |
| 456 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | } |
| 461 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 462 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 463 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 464 | return -1; |
| 465 | } |
| 466 | |
| 467 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 468 | { |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 469 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 470 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 471 | return -1; |
| 472 | |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 473 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 474 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 475 | mgcp_rtp_end_reset(&endp->net_end); |
| 476 | return -1; |
| 477 | } |
| 478 | |
Holger Hans Peter Freyther | 1b8eaf4 | 2011-02-28 14:51:48 +0100 | [diff] [blame] | 479 | 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] | 480 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 481 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 482 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 483 | mgcp_rtp_end_reset(&endp->net_end); |
| 484 | mgcp_rtp_end_reset(&endp->bts_end); |
| 485 | return -1; |
| 486 | } |
| 487 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 488 | if (allocate_port(endp, &endp->trans_bts, |
| 489 | &endp->cfg->transcoder_ports, |
| 490 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 491 | mgcp_rtp_end_reset(&endp->net_end); |
| 492 | mgcp_rtp_end_reset(&endp->bts_end); |
| 493 | mgcp_rtp_end_reset(&endp->trans_net); |
| 494 | return -1; |
| 495 | } |
| 496 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 497 | /* remember that we have set up transcoding */ |
| 498 | endp->is_transcoded = 1; |
Holger Hans Peter Freyther | 56ac269 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 499 | } |
| 500 | |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 501 | return 0; |
| 502 | } |
| 503 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 504 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 505 | { |
| 506 | struct mgcp_msg_ptr data_ptrs[6]; |
| 507 | int found, i, line_start; |
| 508 | const char *trans_id; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 509 | struct mgcp_trunk_config *tcfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 510 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 511 | int error_code = 400; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 512 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 513 | const char *local_options = NULL; |
| 514 | const char *callid = NULL; |
| 515 | const char *mode = NULL; |
| 516 | |
| 517 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 518 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 519 | if (found != 0) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 520 | return create_err_response(510, "CRCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 521 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 522 | tcfg = endp->tcfg; |
| 523 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 524 | /* parse CallID C: and LocalParameters L: */ |
| 525 | MSG_TOKENIZE_START |
| 526 | switch (msg->l3h[line_start]) { |
| 527 | case 'L': |
| 528 | local_options = (const char *) &msg->l3h[line_start + 3]; |
| 529 | break; |
| 530 | case 'C': |
| 531 | callid = (const char *) &msg->l3h[line_start + 3]; |
| 532 | break; |
| 533 | case 'M': |
| 534 | mode = (const char *) & msg->l3h[line_start + 3]; |
| 535 | break; |
| 536 | default: |
| 537 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
| 538 | msg->l3h[line_start], msg->l3h[line_start], |
| 539 | ENDPOINT_NUMBER(endp)); |
| 540 | break; |
| 541 | } |
| 542 | MSG_TOKENIZE_END |
| 543 | |
| 544 | /* Check required data */ |
| 545 | if (!callid || !mode) { |
| 546 | LOGP(DMGCP, LOGL_ERROR, "Missing callid and mode in CRCX on 0x%x\n", |
| 547 | ENDPOINT_NUMBER(endp)); |
| 548 | return create_err_response(400, "CRCX", trans_id); |
| 549 | } |
| 550 | |
| 551 | /* this appears to be a retransmission, maybe check trans id */ |
| 552 | if (endp->allocated && |
| 553 | memcmp(endp->callid, callid, strlen(endp->callid)) == 0) |
| 554 | return create_response_with_sdp(endp, "CRCX", trans_id); |
| 555 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 556 | if (endp->allocated) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 557 | if (tcfg->force_realloc) { |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 558 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 559 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 5c132ee | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 560 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 70d18cb | 2010-08-06 17:54:27 +0800 | [diff] [blame] | 561 | if (cfg->realloc_cb) |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 562 | cfg->realloc_cb(tcfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 563 | } else { |
| 564 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 565 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 566 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | dd67a3b | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 567 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 568 | } |
| 569 | |
Holger Hans Peter Freyther | c9c0fe5 | 2011-07-20 20:44:54 +0200 | [diff] [blame] | 570 | /* copy some parameters */ |
| 571 | endp->callid = talloc_strdup(tcfg->endpoints, callid); |
| 572 | |
| 573 | if (local_options) |
| 574 | endp->local_options = talloc_strdup(tcfg->endpoints, local_options); |
| 575 | |
| 576 | if (parse_conn_mode(mode, &endp->conn_mode) != 0) { |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 577 | error_code = 517; |
| 578 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 579 | } |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 580 | |
| 581 | /* initialize */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 582 | endp->net_end.rtp_port = endp->net_end.rtcp_port = endp->bts_end.rtp_port = endp->bts_end.rtcp_port = 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 583 | |
| 584 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 585 | 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] | 586 | |
| 587 | /* bind to the port now */ |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 588 | if (allocate_ports(endp) != 0) |
| 589 | goto error2; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 590 | |
| 591 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 592 | endp->ci = generate_call_id(cfg); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 593 | if (endp->ci == CI_UNUSED) |
| 594 | goto error2; |
| 595 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 596 | endp->allocated = 1; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 597 | endp->bts_end.payload_type = tcfg->audio_payload; |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 598 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 599 | /* policy CB */ |
| 600 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 601 | switch (cfg->policy_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 602 | case MGCP_POLICY_REJECT: |
| 603 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 604 | ENDPOINT_NUMBER(endp)); |
| 605 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 606 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 607 | break; |
| 608 | case MGCP_POLICY_DEFER: |
| 609 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 610 | create_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 611 | return NULL; |
| 612 | break; |
| 613 | case MGCP_POLICY_CONT: |
| 614 | /* just continue */ |
| 615 | break; |
| 616 | } |
| 617 | } |
| 618 | |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 619 | 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] | 620 | ENDPOINT_NUMBER(endp), endp->ci, |
| 621 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 622 | if (cfg->change_cb) |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 623 | cfg->change_cb(tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 25374bd | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 624 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 625 | create_transcoder(endp); |
Holger Hans Peter Freyther | 60d02a3 | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 626 | return create_response_with_sdp(endp, "CRCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 627 | error: |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 628 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Pablo Neira Ayuso | b1d5a69 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 629 | osmo_hexdump(msg->l3h, msgb_l3len(msg)), |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 630 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 631 | return create_err_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 632 | |
| 633 | error2: |
Holger Hans Peter Freyther | 411764b | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 634 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 635 | LOGP(DMGCP, LOGL_NOTICE, "Resource error on 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 636 | return create_err_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 637 | } |
| 638 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 639 | static struct msgb *handle_modify_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 640 | { |
| 641 | struct mgcp_msg_ptr data_ptrs[6]; |
| 642 | int found, i, line_start; |
| 643 | const char *trans_id; |
| 644 | struct mgcp_endpoint *endp; |
| 645 | int error_code = 500; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 646 | int silent = 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 647 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 648 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 649 | if (found != 0) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 650 | return create_err_response(510, "MDCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 651 | |
| 652 | if (endp->ci == CI_UNUSED) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 653 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 654 | return create_err_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 655 | } |
| 656 | |
| 657 | MSG_TOKENIZE_START |
| 658 | switch (msg->l3h[line_start]) { |
| 659 | case 'C': { |
| 660 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 661 | goto error3; |
| 662 | break; |
| 663 | } |
| 664 | case 'I': { |
| 665 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 666 | goto error3; |
| 667 | break; |
| 668 | } |
| 669 | case 'L': |
| 670 | /* skip */ |
| 671 | break; |
| 672 | case 'M': |
| 673 | if (parse_conn_mode((const char *)&msg->l3h[line_start + 3], |
| 674 | &endp->conn_mode) != 0) { |
| 675 | error_code = 517; |
| 676 | goto error3; |
| 677 | } |
Holger Hans Peter Freyther | b33ded1 | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 678 | endp->orig_mode = endp->conn_mode; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 679 | break; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 680 | case 'Z': |
| 681 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 682 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 683 | case '\0': |
| 684 | /* SDP file begins */ |
| 685 | break; |
| 686 | case 'a': |
| 687 | case 'o': |
| 688 | case 's': |
| 689 | case 't': |
| 690 | case 'v': |
| 691 | /* skip these SDP attributes */ |
| 692 | break; |
| 693 | case 'm': { |
| 694 | int port; |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 695 | int payload; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 696 | const char *param = (const char *)&msg->l3h[line_start]; |
| 697 | |
Holger Hans Peter Freyther | 001dc61 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 698 | if (sscanf(param, "m=audio %d RTP/AVP %d", &port, &payload) == 2) { |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 699 | endp->net_end.rtp_port = htons(port); |
| 700 | endp->net_end.rtcp_port = htons(port + 1); |
| 701 | endp->net_end.payload_type = payload; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 702 | } |
| 703 | break; |
| 704 | } |
| 705 | case 'c': { |
| 706 | char ipv4[16]; |
| 707 | const char *param = (const char *)&msg->l3h[line_start]; |
| 708 | |
| 709 | if (sscanf(param, "c=IN IP4 %15s", ipv4) == 1) { |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 710 | inet_aton(ipv4, &endp->net_end.addr); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 711 | } |
| 712 | break; |
| 713 | } |
| 714 | default: |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 715 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 716 | msg->l3h[line_start], msg->l3h[line_start], |
| 717 | ENDPOINT_NUMBER(endp)); |
| 718 | break; |
| 719 | } |
| 720 | MSG_TOKENIZE_END |
| 721 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 722 | /* policy CB */ |
| 723 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 724 | switch (cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 725 | case MGCP_POLICY_REJECT: |
| 726 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 727 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 728 | if (silent) |
| 729 | goto out_silent; |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 730 | return create_err_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 731 | break; |
| 732 | case MGCP_POLICY_DEFER: |
| 733 | /* stop processing */ |
| 734 | return NULL; |
| 735 | break; |
| 736 | case MGCP_POLICY_CONT: |
| 737 | /* just continue */ |
| 738 | break; |
| 739 | } |
| 740 | } |
| 741 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 742 | /* modify */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 743 | 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] | 744 | ENDPOINT_NUMBER(endp), inet_ntoa(endp->net_end.addr), ntohs(endp->net_end.rtp_port)); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 745 | if (cfg->change_cb) |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 746 | cfg->change_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 747 | if (silent) |
| 748 | goto out_silent; |
| 749 | |
Holger Hans Peter Freyther | 60d02a3 | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 750 | return create_response_with_sdp(endp, "MDCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 751 | |
| 752 | error: |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 753 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d %d\n", |
Pablo Neira Ayuso | b1d5a69 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 754 | osmo_hexdump(msg->l3h, msgb_l3len(msg)), |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 755 | ENDPOINT_NUMBER(endp), line_start, i, msg->l3h[line_start]); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 756 | return create_err_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 757 | |
| 758 | error3: |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 759 | return create_err_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 760 | |
| 761 | |
| 762 | out_silent: |
| 763 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 764 | } |
| 765 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 766 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 767 | { |
| 768 | struct mgcp_msg_ptr data_ptrs[6]; |
| 769 | int found, i, line_start; |
| 770 | const char *trans_id; |
| 771 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 94ed60f | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 772 | int error_code = 400; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 773 | int silent = 0; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 774 | |
Holger Hans Peter Freyther | 9635463 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 775 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 776 | if (found != 0) |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 777 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 778 | |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 779 | if (!endp->allocated) { |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 780 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 781 | return create_err_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 782 | } |
| 783 | |
| 784 | MSG_TOKENIZE_START |
| 785 | switch (msg->l3h[line_start]) { |
| 786 | case 'C': { |
| 787 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 788 | goto error3; |
| 789 | break; |
| 790 | } |
| 791 | case 'I': { |
| 792 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 793 | goto error3; |
| 794 | break; |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 795 | case 'Z': |
| 796 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 797 | break; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 798 | } |
| 799 | default: |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 800 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 801 | msg->l3h[line_start], msg->l3h[line_start], |
| 802 | ENDPOINT_NUMBER(endp)); |
| 803 | break; |
| 804 | } |
| 805 | MSG_TOKENIZE_END |
| 806 | |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 807 | /* policy CB */ |
| 808 | if (cfg->policy_cb) { |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 809 | switch (cfg->policy_cb(endp->tcfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) { |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 810 | case MGCP_POLICY_REJECT: |
| 811 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 812 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 813 | if (silent) |
| 814 | goto out_silent; |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 815 | return create_err_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 816 | break; |
| 817 | case MGCP_POLICY_DEFER: |
| 818 | /* stop processing */ |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 819 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 7a8ff2a | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 820 | return NULL; |
| 821 | break; |
| 822 | case MGCP_POLICY_CONT: |
| 823 | /* just continue */ |
| 824 | break; |
| 825 | } |
| 826 | } |
| 827 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 828 | /* free the connection */ |
Holger Hans Peter Freyther | 73d0047 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 829 | 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] | 830 | 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] | 831 | |
| 832 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 833 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 834 | if (cfg->change_cb) |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 835 | 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] | 836 | |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 837 | if (silent) |
| 838 | goto out_silent; |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 839 | return create_ok_response(250, "DLCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 840 | |
| 841 | error: |
Holger Hans Peter Freyther | 02c7a6f | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 842 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Pablo Neira Ayuso | b1d5a69 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 843 | osmo_hexdump(msg->l3h, msgb_l3len(msg)), |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 844 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 845 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 846 | |
| 847 | error3: |
Holger Hans Peter Freyther | 804019a | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 848 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e077c91 | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 849 | |
| 850 | out_silent: |
| 851 | return NULL; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 852 | } |
| 853 | |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 854 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg) |
| 855 | { |
Holger Hans Peter Freyther | 26bd848 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 856 | struct mgcp_msg_ptr data_ptrs[6]; |
| 857 | const char *trans_id; |
| 858 | struct mgcp_endpoint *endp; |
| 859 | int found; |
| 860 | |
| 861 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), |
| 862 | &trans_id, &endp); |
| 863 | if (found != 0) { |
| 864 | LOGP(DMGCP, LOGL_ERROR, "Failed to find the endpoint.\n"); |
| 865 | return NULL; |
| 866 | } |
| 867 | |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 868 | if (cfg->reset_cb) |
Holger Hans Peter Freyther | 26bd848 | 2011-06-10 00:04:55 +0200 | [diff] [blame] | 869 | cfg->reset_cb(endp->tcfg); |
Holger Hans Peter Freyther | d60c6e5 | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 870 | return NULL; |
| 871 | } |
| 872 | |
Holger Hans Peter Freyther | ac0968e | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 873 | /* |
| 874 | * This can request like DTMF detection and forward, fax detection... it |
| 875 | * can also request when the notification should be send and such. We don't |
| 876 | * do this right now. |
| 877 | */ |
| 878 | static struct msgb *handle_noti_req(struct mgcp_config *cfg, struct msgb *msg) |
| 879 | { |
| 880 | struct mgcp_msg_ptr data_ptrs[6]; |
| 881 | const char *trans_id; |
| 882 | struct mgcp_endpoint *endp; |
| 883 | int found; |
| 884 | |
| 885 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
| 886 | if (found != 0) |
| 887 | return create_err_response(400, "RQNT", trans_id); |
| 888 | |
| 889 | if (!endp->allocated) { |
| 890 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 891 | return create_err_response(400, "RQNT", trans_id); |
| 892 | } |
| 893 | return create_ok_response(200, "RQNT", trans_id); |
| 894 | } |
| 895 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 896 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 897 | { |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 898 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 899 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 900 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 901 | if (!cfg) { |
| 902 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 903 | return NULL; |
| 904 | } |
| 905 | |
| 906 | cfg->source_port = 2427; |
| 907 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 908 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 909 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 2ea9118 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 910 | |
| 911 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 912 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 913 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 914 | /* default trunk handling */ |
| 915 | cfg->trunk.cfg = cfg; |
| 916 | cfg->trunk.trunk_nr = 0; |
| 917 | cfg->trunk.trunk_type = MGCP_TRUNK_VIRTUAL; |
| 918 | cfg->trunk.audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 919 | cfg->trunk.audio_payload = 126; |
| 920 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 921 | INIT_LLIST_HEAD(&cfg->trunks); |
| 922 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 923 | return cfg; |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 924 | } |
| 925 | |
Holger Hans Peter Freyther | 06bfe79 | 2011-02-28 12:11:02 +0100 | [diff] [blame] | 926 | struct mgcp_trunk_config *mgcp_trunk_alloc(struct mgcp_config *cfg, int nr) |
| 927 | { |
| 928 | struct mgcp_trunk_config *trunk; |
| 929 | |
| 930 | trunk = talloc_zero(cfg, struct mgcp_trunk_config); |
| 931 | if (!trunk) { |
| 932 | LOGP(DMGCP, LOGL_ERROR, "Failed to allocate.\n"); |
| 933 | return NULL; |
| 934 | } |
| 935 | |
| 936 | trunk->cfg = cfg; |
| 937 | trunk->trunk_type = MGCP_TRUNK_E1; |
| 938 | trunk->trunk_nr = nr; |
| 939 | trunk->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 940 | trunk->audio_payload = 126; |
| 941 | trunk->number_endpoints = 33; |
| 942 | llist_add_tail(&trunk->entry, &cfg->trunks); |
| 943 | return trunk; |
| 944 | } |
| 945 | |
| 946 | struct mgcp_trunk_config *mgcp_trunk_num(struct mgcp_config *cfg, int index) |
| 947 | { |
| 948 | struct mgcp_trunk_config *trunk; |
| 949 | |
| 950 | llist_for_each_entry(trunk, &cfg->trunks, entry) |
| 951 | if (trunk->trunk_nr == index) |
| 952 | return trunk; |
| 953 | |
| 954 | return NULL; |
| 955 | } |
| 956 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 957 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 958 | { |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 959 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 960 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 961 | end->local_port = 0; |
| 962 | } |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 963 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 964 | end->packets = 0; |
| 965 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | 6f94bac | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 966 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 967 | end->payload_type = -1; |
Holger Hans Peter Freyther | 05d8f5f | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 968 | end->local_alloc = -1; |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 969 | } |
| 970 | |
Holger Hans Peter Freyther | bfb68b7 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 971 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 972 | { |
| 973 | mgcp_rtp_end_reset(end); |
| 974 | end->rtp.fd = -1; |
| 975 | end->rtcp.fd = -1; |
| 976 | } |
| 977 | |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 978 | int mgcp_endpoints_allocate(struct mgcp_trunk_config *tcfg) |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 979 | { |
| 980 | int i; |
| 981 | |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 982 | /* Initialize all endpoints */ |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 983 | tcfg->endpoints = _talloc_zero_array(tcfg->cfg, |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 984 | sizeof(struct mgcp_endpoint), |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 985 | tcfg->number_endpoints, "endpoints"); |
| 986 | if (!tcfg->endpoints) |
Holger Hans Peter Freyther | 6f38c06 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 987 | return -1; |
| 988 | |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 989 | for (i = 0; i < tcfg->number_endpoints; ++i) { |
| 990 | tcfg->endpoints[i].ci = CI_UNUSED; |
Holger Hans Peter Freyther | 49e170b | 2011-02-28 14:37:03 +0100 | [diff] [blame] | 991 | tcfg->endpoints[i].cfg = tcfg->cfg; |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 992 | tcfg->endpoints[i].tcfg = tcfg; |
| 993 | mgcp_rtp_end_init(&tcfg->endpoints[i].net_end); |
| 994 | mgcp_rtp_end_init(&tcfg->endpoints[i].bts_end); |
| 995 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_net); |
| 996 | mgcp_rtp_end_init(&tcfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 997 | } |
| 998 | |
Holger Hans Peter Freyther | 26143c8 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 999 | return 0; |
| 1000 | } |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1001 | |
| 1002 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 1003 | { |
Holger Hans Peter Freyther | 62d3bb7 | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 1004 | 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] | 1005 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | e15223b | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 1006 | endp->allocated = 0; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1007 | |
| 1008 | if (endp->callid) { |
| 1009 | talloc_free(endp->callid); |
| 1010 | endp->callid = NULL; |
| 1011 | } |
| 1012 | |
| 1013 | if (endp->local_options) { |
| 1014 | talloc_free(endp->local_options); |
Holger Hans Peter Freyther | a5ec926 | 2010-03-01 18:52:04 +0100 | [diff] [blame] | 1015 | endp->local_options = NULL; |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1016 | } |
| 1017 | |
Holger Hans Peter Freyther | fab76aa | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 1018 | mgcp_rtp_end_reset(&endp->bts_end); |
| 1019 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | b6345ab | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 1020 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1021 | mgcp_rtp_end_reset(&endp->trans_bts); |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1022 | endp->is_transcoded = 0; |
Holger Hans Peter Freyther | e758d95 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 1023 | |
Holger Hans Peter Freyther | 84ba528 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 1024 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 1025 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | b33ded1 | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 1026 | |
| 1027 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 73aa514 | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 1028 | endp->allow_patch = 0; |
Holger Hans Peter Freyther | 8fdb95e | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 1029 | |
| 1030 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 64dcbe2 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 1031 | } |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1032 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1033 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 1034 | { |
| 1035 | struct sockaddr_in addr; |
| 1036 | |
| 1037 | memset(&addr, 0, sizeof(addr)); |
| 1038 | addr.sin_family = AF_INET; |
| 1039 | addr.sin_addr = cfg->transcoder_in; |
| 1040 | addr.sin_port = htons(2427); |
| 1041 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 1042 | (struct sockaddr *) &addr, sizeof(addr)); |
| 1043 | } |
| 1044 | |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1045 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 1046 | const char *msg, const char *mode) |
| 1047 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1048 | char buf[2096]; |
| 1049 | int len; |
| 1050 | |
| 1051 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 1052 | len = snprintf(buf, sizeof(buf), |
| 1053 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 1054 | "C: 4256\r\n" |
| 1055 | "M: %s\r\n" |
| 1056 | "\r\n" |
| 1057 | "c=IN IP4 %s\r\n" |
| 1058 | "m=audio %d RTP/AVP %d\r\n" |
| 1059 | "a=rtpmap:%d %s\r\n", |
| 1060 | msg, endpoint, mode, endp->cfg->source_addr, |
Holger Hans Peter Freyther | ab56ce1 | 2011-02-28 00:56:17 +0100 | [diff] [blame] | 1061 | port, endp->tcfg->audio_payload, |
| 1062 | endp->tcfg->audio_payload, endp->tcfg->audio_name); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1063 | |
| 1064 | if (len < 0) |
| 1065 | return; |
| 1066 | |
| 1067 | buf[sizeof(buf) - 1] = '\0'; |
| 1068 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1069 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1070 | } |
| 1071 | |
| 1072 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 1073 | { |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1074 | char buf[2096]; |
| 1075 | int len; |
| 1076 | |
| 1077 | len = snprintf(buf, sizeof(buf), |
| 1078 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 1079 | "C: 4256\r\n" |
| 1080 | , endpoint); |
| 1081 | |
| 1082 | if (len < 0) |
| 1083 | return; |
| 1084 | |
| 1085 | buf[sizeof(buf) - 1] = '\0'; |
| 1086 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1087 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1088 | } |
| 1089 | |
| 1090 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1091 | { |
| 1092 | int port; |
| 1093 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1094 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1095 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1096 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1097 | return; |
| 1098 | |
Holger Hans Peter Freyther | c9e3bc6 | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1099 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1100 | 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] | 1101 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1102 | 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] | 1103 | |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1104 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1105 | endp->trans_bts.rtp_port = htons(port); |
| 1106 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1107 | |
Holger Hans Peter Freyther | d582b20 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1108 | 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] | 1109 | endp->trans_net.rtp_port = htons(port); |
| 1110 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1111 | } |
| 1112 | |
| 1113 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1114 | { |
| 1115 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | c983f83 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1116 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1117 | |
Holger Hans Peter Freyther | 1d9a8eb | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1118 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 017738d | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1119 | return; |
| 1120 | |
| 1121 | send_dlcx(endp, in_endp); |
| 1122 | send_dlcx(endp, out_endp); |
| 1123 | } |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1124 | |
| 1125 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1126 | { |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1127 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | bafc987 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1128 | return 0; |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1129 | |
| 1130 | static const char mgcp_reset[] = { |
| 1131 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1132 | }; |
| 1133 | |
Holger Hans Peter Freyther | 1adedbb | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1134 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f8fd106 | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1135 | } |