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 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 32 | #include <openbsc/debug.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 33 | #include <osmocore/msgb.h> |
| 34 | #include <osmocore/talloc.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 35 | #include <openbsc/gsm_data.h> |
Harald Welte | dfe6c7d | 2010-02-20 16:24:02 +0100 | [diff] [blame] | 36 | #include <osmocore/select.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 37 | #include <openbsc/mgcp.h> |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 38 | #include <openbsc/mgcp_internal.h> |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 39 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 40 | /** |
| 41 | * Macro for tokenizing MGCP messages and SDP in one go. |
| 42 | * |
| 43 | */ |
| 44 | #define MSG_TOKENIZE_START \ |
| 45 | line_start = 0; \ |
| 46 | for (i = 0; i < msgb_l3len(msg); ++i) { \ |
| 47 | /* we have a line end */ \ |
| 48 | if (msg->l3h[i] == '\n') { \ |
| 49 | /* skip the first line */ \ |
| 50 | if (line_start == 0) { \ |
| 51 | line_start = i + 1; \ |
| 52 | continue; \ |
| 53 | } \ |
| 54 | \ |
| 55 | /* check if we have a proper param */ \ |
| 56 | if (i - line_start == 1 && msg->l3h[line_start] == '\r') { \ |
| 57 | } else if (i - line_start > 2 \ |
| 58 | && islower(msg->l3h[line_start]) \ |
| 59 | && msg->l3h[line_start + 1] == '=') { \ |
| 60 | } else if (i - line_start < 3 \ |
| 61 | || msg->l3h[line_start + 1] != ':' \ |
| 62 | || msg->l3h[line_start + 2] != ' ') \ |
| 63 | goto error; \ |
| 64 | \ |
| 65 | msg->l3h[i] = '\0'; \ |
| 66 | if (msg->l3h[i-1] == '\r') \ |
| 67 | msg->l3h[i-1] = '\0'; |
| 68 | |
| 69 | #define MSG_TOKENIZE_END \ |
| 70 | line_start = i + 1; \ |
| 71 | } \ |
| 72 | } |
| 73 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 74 | 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] | 75 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 76 | struct mgcp_request { |
| 77 | char *name; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 78 | 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] | 79 | char *debug_name; |
| 80 | }; |
| 81 | |
| 82 | #define MGCP_REQUEST(NAME, REQ, DEBUG_NAME) \ |
| 83 | { .name = NAME, .handle_request = REQ, .debug_name = DEBUG_NAME }, |
| 84 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 85 | static struct msgb *handle_audit_endpoint(struct mgcp_config *cfg, struct msgb *msg); |
| 86 | static struct msgb *handle_create_con(struct mgcp_config *cfg, struct msgb *msg); |
| 87 | static struct msgb *handle_delete_con(struct mgcp_config *cfg, struct msgb *msg); |
| 88 | 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] | 89 | 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] | 90 | 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] | 91 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 92 | static void create_transcoder(struct mgcp_endpoint *endp); |
| 93 | static void delete_transcoder(struct mgcp_endpoint *endp); |
| 94 | |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 95 | static uint32_t generate_call_id(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 96 | { |
| 97 | int i; |
| 98 | |
| 99 | /* use the call id */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 100 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 101 | |
| 102 | /* handle wrap around */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 103 | if (cfg->last_call_id == CI_UNUSED) |
| 104 | ++cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 105 | |
| 106 | /* callstack can only be of size number_of_endpoints */ |
| 107 | /* verify that the call id is free, e.g. in case of overrun */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 108 | for (i = 1; i < cfg->number_endpoints; ++i) |
| 109 | if (cfg->endpoints[i].ci == cfg->last_call_id) |
| 110 | return generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 111 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 112 | return cfg->last_call_id; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 113 | } |
| 114 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 115 | /* |
| 116 | * array of function pointers for handling various |
| 117 | * messages. In the future this might be binary sorted |
| 118 | * for performance reasons. |
| 119 | */ |
| 120 | static const struct mgcp_request mgcp_requests [] = { |
| 121 | MGCP_REQUEST("AUEP", handle_audit_endpoint, "AuditEndpoint") |
| 122 | MGCP_REQUEST("CRCX", handle_create_con, "CreateConnection") |
| 123 | MGCP_REQUEST("DLCX", handle_delete_con, "DeleteConnection") |
| 124 | MGCP_REQUEST("MDCX", handle_modify_con, "ModifiyConnection") |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 125 | MGCP_REQUEST("RQNT", handle_noti_req, "NotificationRequest") |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 126 | |
| 127 | /* SPEC extension */ |
| 128 | MGCP_REQUEST("RSIP", handle_rsip, "ReSetInProgress") |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 129 | }; |
| 130 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 131 | static struct msgb *mgcp_msgb_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 132 | { |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 133 | struct msgb *msg; |
| 134 | msg = msgb_alloc_headroom(4096, 128, "MGCP msg"); |
| 135 | if (!msg) |
| 136 | LOGP(DMGCP, LOGL_ERROR, "Failed to msgb for MGCP data.\n"); |
| 137 | |
| 138 | return msg; |
| 139 | } |
| 140 | |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 141 | struct msgb *mgcp_create_response_with_data(int code, const char *txt, |
| 142 | const char *msg, const char *trans, |
| 143 | const char *data) |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 144 | { |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 145 | int len; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 146 | struct msgb *res; |
| 147 | |
| 148 | res = mgcp_msgb_alloc(); |
| 149 | if (!res) |
| 150 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 151 | |
| 152 | if (data) { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 153 | 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] | 154 | } else { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 155 | 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] | 156 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 157 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 158 | res->l2h = msgb_put(res, len); |
Holger Hans Peter Freyther | 63f2db2 | 2010-02-26 13:30:57 +0100 | [diff] [blame] | 159 | 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] | 160 | return res; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 161 | } |
| 162 | |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 163 | 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] | 164 | { |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 165 | return mgcp_create_response_with_data(code, " OK", msg, trans, NULL); |
| 166 | } |
| 167 | |
| 168 | static struct msgb *create_err_response(int code, const char *msg, const char *trans) |
| 169 | { |
| 170 | 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] | 171 | } |
| 172 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 173 | static struct msgb *create_response_with_sdp(struct mgcp_endpoint *endp, |
| 174 | const char *msg, const char *trans_id) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 175 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 176 | const char *addr = endp->cfg->local_ip; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 177 | char sdp_record[4096]; |
| 178 | |
| 179 | if (!addr) |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 180 | addr = endp->cfg->source_addr; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 181 | |
| 182 | snprintf(sdp_record, sizeof(sdp_record) - 1, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 183 | "I: %u\n\n" |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 184 | "v=0\r\n" |
| 185 | "c=IN IP4 %s\r\n" |
| 186 | "m=audio %d RTP/AVP %d\r\n" |
| 187 | "a=rtpmap:%d %s\r\n", |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 188 | endp->ci, addr, endp->net_end.local_port, |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 189 | endp->bts_end.payload_type, endp->bts_end.payload_type, |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 190 | endp->cfg->audio_name); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 191 | 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] | 192 | } |
| 193 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 194 | /* |
| 195 | * handle incoming messages: |
| 196 | * - this can be a command (four letters, space, transaction id) |
| 197 | * - or a response (three numbers, space, transaction id) |
| 198 | */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 199 | 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] | 200 | { |
| 201 | int code; |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 202 | struct msgb *resp = NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 203 | |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 204 | if (msgb_l2len(msg) < 4) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 205 | 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] | 206 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | /* attempt to treat it as a response */ |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 210 | 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] | 211 | LOGP(DMGCP, LOGL_DEBUG, "Response: Code: %d\n", code); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 212 | } else { |
| 213 | int i, handled = 0; |
| 214 | msg->l3h = &msg->l2h[4]; |
| 215 | for (i = 0; i < ARRAY_SIZE(mgcp_requests); ++i) |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 216 | 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] | 217 | handled = 1; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 218 | resp = mgcp_requests[i].handle_request(cfg, msg); |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 219 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 220 | } |
| 221 | if (!handled) { |
Holger Hans Peter Freyther | f36a11a | 2010-03-31 13:26:46 +0200 | [diff] [blame] | 222 | 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] | 223 | } |
| 224 | } |
| 225 | |
Holger Hans Peter Freyther | 62e836c | 2010-02-03 11:03:45 +0100 | [diff] [blame] | 226 | return resp; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | /* string tokenizer for the poor */ |
| 230 | static int find_msg_pointers(struct msgb *msg, struct mgcp_msg_ptr *ptrs, int ptrs_length) |
| 231 | { |
| 232 | int i, found = 0; |
| 233 | |
| 234 | int whitespace = 1; |
| 235 | for (i = 0; i < msgb_l3len(msg) && ptrs_length > 0; ++i) { |
| 236 | /* if we have a space we found an end */ |
| 237 | if (msg->l3h[i] == ' ' || msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 238 | if (!whitespace) { |
| 239 | ++found; |
| 240 | whitespace = 1; |
| 241 | ptrs->length = i - ptrs->start - 1; |
| 242 | ++ptrs; |
| 243 | --ptrs_length; |
| 244 | } else { |
| 245 | /* skip any number of whitespace */ |
| 246 | } |
| 247 | |
| 248 | /* line end... stop */ |
| 249 | if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') |
| 250 | break; |
| 251 | } else if (msg->l3h[i] == '\r' || msg->l3h[i] == '\n') { |
| 252 | /* line end, be done */ |
| 253 | break; |
| 254 | } else if (whitespace) { |
| 255 | whitespace = 0; |
| 256 | ptrs->start = i; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | if (ptrs_length == 0) |
| 261 | return -1; |
| 262 | return found; |
| 263 | } |
| 264 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 265 | /** |
| 266 | * We have a null terminated string with the endpoint name here. We only |
| 267 | * support two kinds. Simple ones as seen on the BSC level and the ones |
| 268 | * seen on the trunk side. |
| 269 | */ |
| 270 | static struct mgcp_endpoint *find_e1_endpoint(struct mgcp_config *cfg, |
| 271 | const char *mgcp) |
| 272 | { |
| 273 | char *rest = NULL; |
| 274 | int trunk, endp, mgcp_endp; |
| 275 | |
| 276 | trunk = strtoul(mgcp + 6, &rest, 10); |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 277 | if (rest == NULL || rest[0] != '/' || trunk < 1) { |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 278 | LOGP(DMGCP, LOGL_ERROR, "Wrong trunk name '%s'\n", mgcp); |
| 279 | return NULL; |
| 280 | } |
| 281 | |
| 282 | endp = strtoul(rest + 1, &rest, 10); |
| 283 | if (rest == NULL || rest[0] != '@') { |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 284 | LOGP(DMGCP, LOGL_ERROR, "Wrong endpoint name '%s'\n", mgcp); |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 285 | return NULL; |
| 286 | } |
| 287 | |
| 288 | /* signalling is on timeslot 1 */ |
| 289 | if (endp == 1) |
| 290 | return NULL; |
| 291 | |
Holger Hans Peter Freyther | f43f2fc | 2011-01-07 11:30:21 +0100 | [diff] [blame] | 292 | mgcp_endp = mgcp_timeslot_to_endpoint(trunk - 1, endp); |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 293 | if (mgcp_endp < 1 || mgcp_endp >= cfg->number_endpoints) { |
| 294 | 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] | 295 | return NULL; |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 296 | } |
| 297 | |
| 298 | return &cfg->endpoints[mgcp_endp]; |
| 299 | } |
| 300 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 301 | 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] | 302 | { |
| 303 | char *endptr = NULL; |
| 304 | unsigned int gw = INT_MAX; |
| 305 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 306 | if (strncmp(mgcp, "ds/e1", 5) == 0) { |
| 307 | return find_e1_endpoint(cfg, mgcp); |
| 308 | } else { |
| 309 | gw = strtoul(mgcp, &endptr, 16); |
| 310 | if (gw > 0 && gw < cfg->number_endpoints && strcmp(endptr, "@mgw") == 0) |
| 311 | return &cfg->endpoints[gw]; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 312 | } |
| 313 | |
Holger Hans Peter Freyther | 9f239a2 | 2011-01-06 19:32:52 +0100 | [diff] [blame] | 314 | LOGP(DMGCP, LOGL_ERROR, "Not able to find endpoint: '%s'\n", mgcp); |
| 315 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 316 | } |
| 317 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 318 | int mgcp_analyze_header(struct mgcp_config *cfg, struct msgb *msg, |
| 319 | struct mgcp_msg_ptr *ptr, int size, |
| 320 | const char **transaction_id, struct mgcp_endpoint **endp) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 321 | { |
| 322 | int found; |
| 323 | |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 324 | *transaction_id = "000000"; |
| 325 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 326 | if (size < 3) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 327 | LOGP(DMGCP, LOGL_ERROR, "Not enough space in ptr\n"); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 328 | return -1; |
| 329 | } |
| 330 | |
| 331 | found = find_msg_pointers(msg, ptr, size); |
| 332 | |
Holger Hans Peter Freyther | a820c5f | 2010-02-26 13:32:55 +0100 | [diff] [blame] | 333 | if (found <= 3) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 334 | LOGP(DMGCP, LOGL_ERROR, "Gateway: Not enough params. Found: %d\n", found); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 335 | return -1; |
| 336 | } |
| 337 | |
| 338 | /* |
| 339 | * replace the space with \0. the main method gurantess that |
| 340 | * we still have + 1 for null termination |
| 341 | */ |
| 342 | msg->l3h[ptr[3].start + ptr[3].length + 1] = '\0'; |
| 343 | msg->l3h[ptr[2].start + ptr[2].length + 1] = '\0'; |
| 344 | msg->l3h[ptr[1].start + ptr[1].length + 1] = '\0'; |
| 345 | msg->l3h[ptr[0].start + ptr[0].length + 1] = '\0'; |
| 346 | |
| 347 | if (strncmp("1.0", (const char *)&msg->l3h[ptr[3].start], 3) != 0 |
| 348 | || strncmp("MGCP", (const char *)&msg->l3h[ptr[2].start], 4) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 349 | LOGP(DMGCP, LOGL_ERROR, "Wrong MGCP version. Not handling: '%s' '%s'\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 350 | (const char *)&msg->l3h[ptr[3].start], |
| 351 | (const char *)&msg->l3h[ptr[2].start]); |
| 352 | return -1; |
| 353 | } |
| 354 | |
| 355 | *transaction_id = (const char *)&msg->l3h[ptr[0].start]; |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 356 | if (endp) { |
| 357 | *endp = find_endpoint(cfg, (const char *)&msg->l3h[ptr[1].start]); |
| 358 | return *endp == NULL; |
| 359 | } |
| 360 | return 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 361 | } |
| 362 | |
| 363 | static int verify_call_id(const struct mgcp_endpoint *endp, |
| 364 | const char *callid) |
| 365 | { |
| 366 | if (strcmp(endp->callid, callid) != 0) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 367 | 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] | 368 | ENDPOINT_NUMBER(endp), endp->callid, callid); |
| 369 | return -1; |
| 370 | } |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
| 375 | static int verify_ci(const struct mgcp_endpoint *endp, |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 376 | const char *_ci) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 377 | { |
Holger Hans Peter Freyther | 4634013 | 2010-08-06 08:26:54 +0800 | [diff] [blame] | 378 | uint32_t ci = strtoul(_ci, NULL, 10); |
| 379 | |
| 380 | if (ci != endp->ci) { |
| 381 | LOGP(DMGCP, LOGL_ERROR, "ConnectionIdentifiers do not match on 0x%x. %u != %s\n", |
| 382 | ENDPOINT_NUMBER(endp), endp->ci, _ci); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 383 | return -1; |
| 384 | } |
| 385 | |
| 386 | return 0; |
| 387 | } |
| 388 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 389 | 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] | 390 | { |
| 391 | struct mgcp_msg_ptr data_ptrs[6]; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 392 | int found; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 393 | const char *trans_id; |
| 394 | struct mgcp_endpoint *endp; |
| 395 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 396 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 397 | if (found != 0) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 398 | return create_err_response(500, "AUEP", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 399 | else |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 400 | return create_ok_response(200, "AUEP", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 401 | } |
| 402 | |
Holger Hans Peter Freyther | adb6e1c | 2010-09-18 06:44:24 +0800 | [diff] [blame] | 403 | 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] | 404 | { |
| 405 | int ret = 0; |
| 406 | if (strcmp(msg, "recvonly") == 0) |
| 407 | *conn_mode = MGCP_CONN_RECV_ONLY; |
| 408 | else if (strcmp(msg, "sendrecv") == 0) |
| 409 | *conn_mode = MGCP_CONN_RECV_SEND; |
Holger Hans Peter Freyther | e02860a | 2010-09-18 20:21:44 +0800 | [diff] [blame] | 410 | else if (strcmp(msg, "sendonly") == 0) |
| 411 | *conn_mode = MGCP_CONN_SEND_ONLY; |
Holger Hans Peter Freyther | 98a3877 | 2010-08-03 02:27:21 +0800 | [diff] [blame] | 412 | else if (strcmp(msg, "loopback") == 0) |
| 413 | *conn_mode = MGCP_CONN_LOOPBACK; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 414 | else { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 415 | LOGP(DMGCP, LOGL_ERROR, "Unknown connection mode: '%s'\n", msg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 416 | ret = -1; |
| 417 | } |
| 418 | |
| 419 | return ret; |
| 420 | } |
| 421 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 422 | 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] | 423 | struct mgcp_port_range *range, |
| 424 | int (*alloc)(struct mgcp_endpoint *endp, int port)) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 425 | { |
| 426 | int i; |
| 427 | |
| 428 | if (range->mode == PORT_ALLOC_STATIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 429 | end->local_alloc = PORT_ALLOC_STATIC; |
| 430 | return 0; |
| 431 | } |
| 432 | |
| 433 | /* attempt to find a port */ |
| 434 | for (i = 0; i < 200; ++i) { |
| 435 | int rc; |
| 436 | |
| 437 | if (range->last_port >= range->range_end) |
| 438 | range->last_port = range->range_start; |
| 439 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 440 | rc = alloc(endp, range->last_port); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 441 | |
| 442 | range->last_port += 2; |
| 443 | if (rc == 0) { |
| 444 | end->local_alloc = PORT_ALLOC_DYNAMIC; |
| 445 | return 0; |
| 446 | } |
| 447 | |
| 448 | } |
| 449 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 450 | LOGP(DMGCP, LOGL_ERROR, "Allocating a RTP/RTCP port failed 200 times 0x%x.\n", |
| 451 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 452 | return -1; |
| 453 | } |
| 454 | |
| 455 | static int allocate_ports(struct mgcp_endpoint *endp) |
| 456 | { |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 457 | if (allocate_port(endp, &endp->net_end, &endp->cfg->net_ports, |
| 458 | mgcp_bind_net_rtp_port) != 0) |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 459 | return -1; |
| 460 | |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 461 | if (allocate_port(endp, &endp->bts_end, &endp->cfg->bts_ports, |
| 462 | mgcp_bind_bts_rtp_port) != 0) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 463 | mgcp_rtp_end_reset(&endp->net_end); |
| 464 | return -1; |
| 465 | } |
| 466 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 467 | if (endp->cfg->transcoder_ip) { |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 468 | if (allocate_port(endp, &endp->trans_net, |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 469 | &endp->cfg->transcoder_ports, |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 470 | mgcp_bind_trans_net_rtp_port) != 0) { |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 471 | mgcp_rtp_end_reset(&endp->net_end); |
| 472 | mgcp_rtp_end_reset(&endp->bts_end); |
| 473 | return -1; |
| 474 | } |
| 475 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 476 | if (allocate_port(endp, &endp->trans_bts, |
| 477 | &endp->cfg->transcoder_ports, |
| 478 | mgcp_bind_trans_bts_rtp_port) != 0) { |
| 479 | mgcp_rtp_end_reset(&endp->net_end); |
| 480 | mgcp_rtp_end_reset(&endp->bts_end); |
| 481 | mgcp_rtp_end_reset(&endp->trans_net); |
| 482 | return -1; |
| 483 | } |
| 484 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 485 | /* remember that we have set up transcoding */ |
| 486 | endp->is_transcoded = 1; |
Holger Hans Peter Freyther | 218f856 | 2010-09-18 02:30:02 +0800 | [diff] [blame] | 487 | } |
| 488 | |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 489 | return 0; |
| 490 | } |
| 491 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 492 | 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] | 493 | { |
| 494 | struct mgcp_msg_ptr data_ptrs[6]; |
| 495 | int found, i, line_start; |
| 496 | const char *trans_id; |
| 497 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 498 | int error_code = 400; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 499 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 500 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 501 | if (found != 0) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 502 | return create_err_response(510, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 503 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 504 | if (endp->allocated) { |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 505 | if (cfg->force_realloc) { |
| 506 | LOGP(DMGCP, LOGL_NOTICE, "Endpoint 0x%x already allocated. Forcing realloc.\n", |
| 507 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 32d4e50 | 2010-04-24 21:02:48 +0800 | [diff] [blame] | 508 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 869e38e | 2010-08-06 17:54:27 +0800 | [diff] [blame] | 509 | if (cfg->realloc_cb) |
| 510 | cfg->realloc_cb(cfg, ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 511 | } else { |
| 512 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is already used. 0x%x\n", |
| 513 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 514 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | 408cc4a | 2010-04-07 10:51:27 +0200 | [diff] [blame] | 515 | } |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | /* parse CallID C: and LocalParameters L: */ |
| 519 | MSG_TOKENIZE_START |
| 520 | switch (msg->l3h[line_start]) { |
| 521 | case 'L': |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 522 | endp->local_options = talloc_strdup(cfg->endpoints, |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 523 | (const char *)&msg->l3h[line_start + 3]); |
| 524 | break; |
| 525 | case 'C': |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 526 | endp->callid = talloc_strdup(cfg->endpoints, |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 527 | (const char *)&msg->l3h[line_start + 3]); |
| 528 | break; |
| 529 | case 'M': |
| 530 | if (parse_conn_mode((const char *)&msg->l3h[line_start + 3], |
| 531 | &endp->conn_mode) != 0) { |
| 532 | error_code = 517; |
| 533 | goto error2; |
| 534 | } |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 535 | |
| 536 | endp->orig_mode = endp->conn_mode; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 537 | break; |
| 538 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 539 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 540 | msg->l3h[line_start], msg->l3h[line_start], |
| 541 | ENDPOINT_NUMBER(endp)); |
| 542 | break; |
| 543 | } |
| 544 | MSG_TOKENIZE_END |
| 545 | |
| 546 | /* initialize */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 547 | 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] | 548 | |
| 549 | /* set to zero until we get the info */ |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 550 | 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] | 551 | |
| 552 | /* bind to the port now */ |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 553 | if (allocate_ports(endp) != 0) |
| 554 | goto error2; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 555 | |
| 556 | /* assign a local call identifier or fail */ |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 557 | endp->ci = generate_call_id(cfg); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 558 | if (endp->ci == CI_UNUSED) |
| 559 | goto error2; |
| 560 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 561 | endp->allocated = 1; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 562 | endp->bts_end.payload_type = cfg->audio_payload; |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 563 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 564 | /* policy CB */ |
| 565 | if (cfg->policy_cb) { |
| 566 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX, trans_id)) { |
| 567 | case MGCP_POLICY_REJECT: |
| 568 | LOGP(DMGCP, LOGL_NOTICE, "CRCX rejected by policy on 0x%x\n", |
| 569 | ENDPOINT_NUMBER(endp)); |
| 570 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 571 | return create_err_response(400, "CRCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 572 | break; |
| 573 | case MGCP_POLICY_DEFER: |
| 574 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 575 | create_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 576 | return NULL; |
| 577 | break; |
| 578 | case MGCP_POLICY_CONT: |
| 579 | /* just continue */ |
| 580 | break; |
| 581 | } |
| 582 | } |
| 583 | |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 584 | 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] | 585 | ENDPOINT_NUMBER(endp), endp->ci, |
| 586 | endp->net_end.local_port, endp->bts_end.local_port); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 587 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 588 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_CRCX); |
Holger Hans Peter Freyther | 77f7afe | 2010-02-03 09:54:43 +0100 | [diff] [blame] | 589 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 590 | create_transcoder(endp); |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 591 | return create_response_with_sdp(endp, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 592 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 593 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 594 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 595 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 596 | return create_err_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 597 | |
| 598 | error2: |
Holger Hans Peter Freyther | 414bf40 | 2010-08-06 07:05:13 +0800 | [diff] [blame] | 599 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 600 | 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] | 601 | return create_err_response(error_code, "CRCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 602 | } |
| 603 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 604 | 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] | 605 | { |
| 606 | struct mgcp_msg_ptr data_ptrs[6]; |
| 607 | int found, i, line_start; |
| 608 | const char *trans_id; |
| 609 | struct mgcp_endpoint *endp; |
| 610 | int error_code = 500; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 611 | int silent = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 612 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 613 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 614 | if (found != 0) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 615 | return create_err_response(510, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 616 | |
| 617 | if (endp->ci == CI_UNUSED) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 618 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not holding a connection. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 619 | return create_err_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 620 | } |
| 621 | |
| 622 | MSG_TOKENIZE_START |
| 623 | switch (msg->l3h[line_start]) { |
| 624 | case 'C': { |
| 625 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 626 | goto error3; |
| 627 | break; |
| 628 | } |
| 629 | case 'I': { |
| 630 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 631 | goto error3; |
| 632 | break; |
| 633 | } |
| 634 | case 'L': |
| 635 | /* skip */ |
| 636 | break; |
| 637 | case 'M': |
| 638 | if (parse_conn_mode((const char *)&msg->l3h[line_start + 3], |
| 639 | &endp->conn_mode) != 0) { |
| 640 | error_code = 517; |
| 641 | goto error3; |
| 642 | } |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 643 | endp->orig_mode = endp->conn_mode; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 644 | break; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 645 | case 'Z': |
| 646 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 647 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 648 | case '\0': |
| 649 | /* SDP file begins */ |
| 650 | break; |
| 651 | case 'a': |
| 652 | case 'o': |
| 653 | case 's': |
| 654 | case 't': |
| 655 | case 'v': |
| 656 | /* skip these SDP attributes */ |
| 657 | break; |
| 658 | case 'm': { |
| 659 | int port; |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 660 | int payload; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 661 | const char *param = (const char *)&msg->l3h[line_start]; |
| 662 | |
Holger Hans Peter Freyther | ef6bb25 | 2010-02-26 13:41:22 +0100 | [diff] [blame] | 663 | if (sscanf(param, "m=audio %d RTP/AVP %d", &port, &payload) == 2) { |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 664 | endp->net_end.rtp_port = htons(port); |
| 665 | endp->net_end.rtcp_port = htons(port + 1); |
| 666 | endp->net_end.payload_type = payload; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 667 | } |
| 668 | break; |
| 669 | } |
| 670 | case 'c': { |
| 671 | char ipv4[16]; |
| 672 | const char *param = (const char *)&msg->l3h[line_start]; |
| 673 | |
| 674 | if (sscanf(param, "c=IN IP4 %15s", ipv4) == 1) { |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 675 | inet_aton(ipv4, &endp->net_end.addr); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 676 | } |
| 677 | break; |
| 678 | } |
| 679 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 680 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 681 | msg->l3h[line_start], msg->l3h[line_start], |
| 682 | ENDPOINT_NUMBER(endp)); |
| 683 | break; |
| 684 | } |
| 685 | MSG_TOKENIZE_END |
| 686 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 687 | /* policy CB */ |
| 688 | if (cfg->policy_cb) { |
| 689 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX, trans_id)) { |
| 690 | case MGCP_POLICY_REJECT: |
| 691 | LOGP(DMGCP, LOGL_NOTICE, "MDCX rejected by policy on 0x%x\n", |
| 692 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 693 | if (silent) |
| 694 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 695 | return create_err_response(400, "MDCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 696 | break; |
| 697 | case MGCP_POLICY_DEFER: |
| 698 | /* stop processing */ |
| 699 | return NULL; |
| 700 | break; |
| 701 | case MGCP_POLICY_CONT: |
| 702 | /* just continue */ |
| 703 | break; |
| 704 | } |
| 705 | } |
| 706 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 707 | /* modify */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 708 | 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] | 709 | 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] | 710 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 711 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_MDCX); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 712 | if (silent) |
| 713 | goto out_silent; |
| 714 | |
Holger Hans Peter Freyther | 8d188ed | 2010-02-21 01:44:08 +0100 | [diff] [blame] | 715 | return create_response_with_sdp(endp, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 716 | |
| 717 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 718 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 719 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 720 | ENDPOINT_NUMBER(endp), line_start, i, msg->l3h[line_start]); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 721 | return create_err_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 722 | |
| 723 | error3: |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 724 | return create_err_response(error_code, "MDCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 725 | |
| 726 | |
| 727 | out_silent: |
| 728 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 729 | } |
| 730 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 731 | 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] | 732 | { |
| 733 | struct mgcp_msg_ptr data_ptrs[6]; |
| 734 | int found, i, line_start; |
| 735 | const char *trans_id; |
| 736 | struct mgcp_endpoint *endp; |
Holger Hans Peter Freyther | 9e9392d | 2010-08-08 16:24:48 +0800 | [diff] [blame] | 737 | int error_code = 400; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 738 | int silent = 0; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 739 | |
Holger Hans Peter Freyther | f2f1591 | 2010-04-01 03:27:04 +0200 | [diff] [blame] | 740 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 741 | if (found != 0) |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 742 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 743 | |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 744 | if (!endp->allocated) { |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 745 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 746 | return create_err_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | MSG_TOKENIZE_START |
| 750 | switch (msg->l3h[line_start]) { |
| 751 | case 'C': { |
| 752 | if (verify_call_id(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 753 | goto error3; |
| 754 | break; |
| 755 | } |
| 756 | case 'I': { |
| 757 | if (verify_ci(endp, (const char *)&msg->l3h[line_start + 3]) != 0) |
| 758 | goto error3; |
| 759 | break; |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 760 | case 'Z': |
| 761 | silent = strcmp("noanswer", (const char *)&msg->l3h[line_start + 3]) == 0; |
| 762 | break; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 763 | } |
| 764 | default: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 765 | LOGP(DMGCP, LOGL_NOTICE, "Unhandled option: '%c'/%d on 0x%x\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 766 | msg->l3h[line_start], msg->l3h[line_start], |
| 767 | ENDPOINT_NUMBER(endp)); |
| 768 | break; |
| 769 | } |
| 770 | MSG_TOKENIZE_END |
| 771 | |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 772 | /* policy CB */ |
| 773 | if (cfg->policy_cb) { |
| 774 | switch (cfg->policy_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX, trans_id)) { |
| 775 | case MGCP_POLICY_REJECT: |
| 776 | LOGP(DMGCP, LOGL_NOTICE, "DLCX rejected by policy on 0x%x\n", |
| 777 | ENDPOINT_NUMBER(endp)); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 778 | if (silent) |
| 779 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 780 | return create_err_response(400, "DLCX", trans_id); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 781 | break; |
| 782 | case MGCP_POLICY_DEFER: |
| 783 | /* stop processing */ |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 784 | delete_transcoder(endp); |
Holger Hans Peter Freyther | fe86d3c | 2010-02-26 13:37:05 +0100 | [diff] [blame] | 785 | return NULL; |
| 786 | break; |
| 787 | case MGCP_POLICY_CONT: |
| 788 | /* just continue */ |
| 789 | break; |
| 790 | } |
| 791 | } |
| 792 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 793 | /* free the connection */ |
Holger Hans Peter Freyther | e378cb1 | 2010-08-06 20:22:23 +0800 | [diff] [blame] | 794 | 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] | 795 | 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] | 796 | |
| 797 | delete_transcoder(endp); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 798 | mgcp_free_endp(endp); |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 799 | if (cfg->change_cb) |
Holger Hans Peter Freyther | 58ff219 | 2010-08-05 03:08:35 +0800 | [diff] [blame] | 800 | cfg->change_cb(cfg, ENDPOINT_NUMBER(endp), MGCP_ENDP_DLCX); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 801 | |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 802 | if (silent) |
| 803 | goto out_silent; |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 804 | return create_ok_response(250, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 805 | |
| 806 | error: |
Holger Hans Peter Freyther | 2ada71d | 2010-02-03 09:13:10 +0100 | [diff] [blame] | 807 | LOGP(DMGCP, LOGL_ERROR, "Malformed line: %s on 0x%x with: line_start: %d %d\n", |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 808 | hexdump(msg->l3h, msgb_l3len(msg)), |
| 809 | ENDPOINT_NUMBER(endp), line_start, i); |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 810 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 811 | |
| 812 | error3: |
Holger Hans Peter Freyther | 6adac17 | 2011-01-06 16:19:55 +0100 | [diff] [blame] | 813 | return create_err_response(error_code, "DLCX", trans_id); |
Holger Hans Peter Freyther | e3d16bb | 2010-04-22 11:58:13 +0800 | [diff] [blame] | 814 | |
| 815 | out_silent: |
| 816 | return NULL; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 817 | } |
| 818 | |
Holger Hans Peter Freyther | 9bdcc9c | 2010-03-31 06:39:35 +0200 | [diff] [blame] | 819 | static struct msgb *handle_rsip(struct mgcp_config *cfg, struct msgb *msg) |
| 820 | { |
| 821 | if (cfg->reset_cb) |
| 822 | cfg->reset_cb(cfg); |
| 823 | return NULL; |
| 824 | } |
| 825 | |
Holger Hans Peter Freyther | 6e94d6d | 2011-01-25 23:33:54 +0100 | [diff] [blame] | 826 | /* |
| 827 | * This can request like DTMF detection and forward, fax detection... it |
| 828 | * can also request when the notification should be send and such. We don't |
| 829 | * do this right now. |
| 830 | */ |
| 831 | static struct msgb *handle_noti_req(struct mgcp_config *cfg, struct msgb *msg) |
| 832 | { |
| 833 | struct mgcp_msg_ptr data_ptrs[6]; |
| 834 | const char *trans_id; |
| 835 | struct mgcp_endpoint *endp; |
| 836 | int found; |
| 837 | |
| 838 | found = mgcp_analyze_header(cfg, msg, data_ptrs, ARRAY_SIZE(data_ptrs), &trans_id, &endp); |
| 839 | if (found != 0) |
| 840 | return create_err_response(400, "RQNT", trans_id); |
| 841 | |
| 842 | if (!endp->allocated) { |
| 843 | LOGP(DMGCP, LOGL_ERROR, "Endpoint is not used. 0x%x\n", ENDPOINT_NUMBER(endp)); |
| 844 | return create_err_response(400, "RQNT", trans_id); |
| 845 | } |
| 846 | return create_ok_response(200, "RQNT", trans_id); |
| 847 | } |
| 848 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 849 | struct mgcp_config *mgcp_config_alloc(void) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 850 | { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 851 | struct mgcp_config *cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 852 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 853 | cfg = talloc_zero(NULL, struct mgcp_config); |
| 854 | if (!cfg) { |
| 855 | LOGP(DMGCP, LOGL_FATAL, "Failed to allocate config.\n"); |
| 856 | return NULL; |
| 857 | } |
| 858 | |
| 859 | cfg->source_port = 2427; |
| 860 | cfg->source_addr = talloc_strdup(cfg, "0.0.0.0"); |
Holger Hans Peter Freyther | 0e940e6 | 2010-09-19 04:14:38 +0800 | [diff] [blame] | 861 | cfg->audio_name = talloc_strdup(cfg, "AMR/8000"); |
| 862 | cfg->audio_payload = 126; |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 863 | cfg->transcoder_remote_base = 4000; |
Holger Hans Peter Freyther | 15e7389 | 2010-08-05 07:10:56 +0800 | [diff] [blame] | 864 | |
| 865 | cfg->bts_ports.base_port = RTP_PORT_DEFAULT; |
| 866 | cfg->net_ports.base_port = RTP_PORT_NET_DEFAULT; |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 867 | |
| 868 | return cfg; |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 869 | } |
| 870 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 871 | static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) |
| 872 | { |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 873 | if (end->local_alloc == PORT_ALLOC_DYNAMIC) { |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 874 | mgcp_free_rtp_port(end); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 875 | end->local_port = 0; |
| 876 | } |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 877 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 878 | end->packets = 0; |
| 879 | memset(&end->addr, 0, sizeof(end->addr)); |
Holger Hans Peter Freyther | e97155a | 2010-11-02 19:06:13 +0100 | [diff] [blame] | 880 | end->rtp_port = end->rtcp_port = 0; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 881 | end->payload_type = -1; |
Holger Hans Peter Freyther | f138f91 | 2010-08-05 08:08:17 +0800 | [diff] [blame] | 882 | end->local_alloc = -1; |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 883 | } |
| 884 | |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 885 | static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |
| 886 | { |
| 887 | mgcp_rtp_end_reset(end); |
| 888 | end->rtp.fd = -1; |
| 889 | end->rtcp.fd = -1; |
| 890 | } |
| 891 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 892 | int mgcp_endpoints_allocate(struct mgcp_config *cfg) |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 893 | { |
| 894 | int i; |
| 895 | |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 896 | /* Initialize all endpoints */ |
| 897 | cfg->endpoints = _talloc_zero_array(cfg, |
| 898 | sizeof(struct mgcp_endpoint), |
| 899 | cfg->number_endpoints, "endpoints"); |
| 900 | if (!cfg->endpoints) |
| 901 | return -1; |
| 902 | |
| 903 | for (i = 0; i < cfg->number_endpoints; ++i) { |
Holger Hans Peter Freyther | 7bdc637 | 2010-02-20 21:21:02 +0100 | [diff] [blame] | 904 | cfg->endpoints[i].ci = CI_UNUSED; |
| 905 | cfg->endpoints[i].cfg = cfg; |
Holger Hans Peter Freyther | c492127 | 2010-08-05 03:37:22 +0800 | [diff] [blame] | 906 | mgcp_rtp_end_init(&cfg->endpoints[i].net_end); |
| 907 | mgcp_rtp_end_init(&cfg->endpoints[i].bts_end); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 908 | mgcp_rtp_end_init(&cfg->endpoints[i].trans_net); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 909 | mgcp_rtp_end_init(&cfg->endpoints[i].trans_bts); |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 910 | } |
| 911 | |
Holger Hans Peter Freyther | e095502 | 2010-02-03 08:50:33 +0100 | [diff] [blame] | 912 | return 0; |
| 913 | } |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 914 | |
| 915 | void mgcp_free_endp(struct mgcp_endpoint *endp) |
| 916 | { |
Holger Hans Peter Freyther | c77efdf | 2010-03-31 12:31:09 +0200 | [diff] [blame] | 917 | 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] | 918 | endp->ci = CI_UNUSED; |
Holger Hans Peter Freyther | 39a97e2 | 2010-08-06 18:03:11 +0800 | [diff] [blame] | 919 | endp->allocated = 0; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 920 | |
| 921 | if (endp->callid) { |
| 922 | talloc_free(endp->callid); |
| 923 | endp->callid = NULL; |
| 924 | } |
| 925 | |
| 926 | if (endp->local_options) { |
| 927 | talloc_free(endp->local_options); |
Holger Hans Peter Freyther | 88c6eea | 2010-03-01 18:52:04 +0100 | [diff] [blame] | 928 | endp->local_options = NULL; |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 929 | } |
| 930 | |
Holger Hans Peter Freyther | a17d701 | 2010-08-05 01:34:51 +0800 | [diff] [blame] | 931 | mgcp_rtp_end_reset(&endp->bts_end); |
| 932 | mgcp_rtp_end_reset(&endp->net_end); |
Holger Hans Peter Freyther | 2126233 | 2010-11-01 20:53:31 +0100 | [diff] [blame] | 933 | mgcp_rtp_end_reset(&endp->trans_net); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 934 | mgcp_rtp_end_reset(&endp->trans_bts); |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 935 | endp->is_transcoded = 0; |
Holger Hans Peter Freyther | 380b871 | 2010-07-29 02:38:39 +0800 | [diff] [blame] | 936 | |
Holger Hans Peter Freyther | 3186892 | 2010-08-03 11:59:04 +0000 | [diff] [blame] | 937 | memset(&endp->net_state, 0, sizeof(endp->net_state)); |
| 938 | memset(&endp->bts_state, 0, sizeof(endp->bts_state)); |
Holger Hans Peter Freyther | c597a4e | 2010-08-03 02:57:02 +0800 | [diff] [blame] | 939 | |
| 940 | endp->conn_mode = endp->orig_mode = MGCP_CONN_NONE; |
Holger Hans Peter Freyther | 6357a8e | 2010-08-05 12:07:00 +0000 | [diff] [blame] | 941 | endp->allow_patch = 0; |
Holger Hans Peter Freyther | 260d6ed | 2010-08-06 01:12:21 +0800 | [diff] [blame] | 942 | |
| 943 | memset(&endp->taps, 0, sizeof(endp->taps)); |
Holger Hans Peter Freyther | 154b955 | 2010-02-26 13:27:51 +0100 | [diff] [blame] | 944 | } |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 945 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 946 | static int send_trans(struct mgcp_config *cfg, const char *buf, int len) |
| 947 | { |
| 948 | struct sockaddr_in addr; |
| 949 | |
| 950 | memset(&addr, 0, sizeof(addr)); |
| 951 | addr.sin_family = AF_INET; |
| 952 | addr.sin_addr = cfg->transcoder_in; |
| 953 | addr.sin_port = htons(2427); |
| 954 | return sendto(cfg->gw_fd.bfd.fd, buf, len, 0, |
| 955 | (struct sockaddr *) &addr, sizeof(addr)); |
| 956 | } |
| 957 | |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 958 | static void send_msg(struct mgcp_endpoint *endp, int endpoint, int port, |
| 959 | const char *msg, const char *mode) |
| 960 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 961 | char buf[2096]; |
| 962 | int len; |
| 963 | |
| 964 | /* hardcoded to AMR right now, we do not know the real type at this point */ |
| 965 | len = snprintf(buf, sizeof(buf), |
| 966 | "%s 42 %x@mgw MGCP 1.0\r\n" |
| 967 | "C: 4256\r\n" |
| 968 | "M: %s\r\n" |
| 969 | "\r\n" |
| 970 | "c=IN IP4 %s\r\n" |
| 971 | "m=audio %d RTP/AVP %d\r\n" |
| 972 | "a=rtpmap:%d %s\r\n", |
| 973 | msg, endpoint, mode, endp->cfg->source_addr, |
| 974 | port, endp->cfg->audio_payload, |
| 975 | endp->cfg->audio_payload, endp->cfg->audio_name); |
| 976 | |
| 977 | if (len < 0) |
| 978 | return; |
| 979 | |
| 980 | buf[sizeof(buf) - 1] = '\0'; |
| 981 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 982 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 983 | } |
| 984 | |
| 985 | static void send_dlcx(struct mgcp_endpoint *endp, int endpoint) |
| 986 | { |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 987 | char buf[2096]; |
| 988 | int len; |
| 989 | |
| 990 | len = snprintf(buf, sizeof(buf), |
| 991 | "DLCX 43 %x@mgw MGCP 1.0\r\n" |
| 992 | "C: 4256\r\n" |
| 993 | , endpoint); |
| 994 | |
| 995 | if (len < 0) |
| 996 | return; |
| 997 | |
| 998 | buf[sizeof(buf) - 1] = '\0'; |
| 999 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1000 | send_trans(endp->cfg, buf, len); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1001 | } |
| 1002 | |
| 1003 | static void create_transcoder(struct mgcp_endpoint *endp) |
| 1004 | { |
| 1005 | int port; |
| 1006 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1007 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1008 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1009 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1010 | return; |
| 1011 | |
Holger Hans Peter Freyther | 8b19dee | 2010-11-01 22:38:25 +0100 | [diff] [blame] | 1012 | send_msg(endp, in_endp, endp->trans_bts.local_port, "CRCX", "sendrecv"); |
| 1013 | 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] | 1014 | send_msg(endp, out_endp, endp->trans_net.local_port, "CRCX", "sendrecv"); |
| 1015 | 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] | 1016 | |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1017 | port = rtp_calculate_port(in_endp, endp->cfg->transcoder_remote_base); |
| 1018 | endp->trans_bts.rtp_port = htons(port); |
| 1019 | endp->trans_bts.rtcp_port = htons(port + 1); |
| 1020 | |
Holger Hans Peter Freyther | b98ba72 | 2010-09-19 04:21:39 +0800 | [diff] [blame] | 1021 | 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] | 1022 | endp->trans_net.rtp_port = htons(port); |
| 1023 | endp->trans_net.rtcp_port = htons(port + 1); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | static void delete_transcoder(struct mgcp_endpoint *endp) |
| 1027 | { |
| 1028 | int in_endp = ENDPOINT_NUMBER(endp); |
Holger Hans Peter Freyther | bd7b3c5 | 2010-11-01 21:04:54 +0100 | [diff] [blame] | 1029 | int out_endp = endp_back_channel(in_endp); |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1030 | |
Holger Hans Peter Freyther | b54048f | 2010-11-01 19:57:50 +0100 | [diff] [blame] | 1031 | if (!endp->is_transcoded) |
Holger Hans Peter Freyther | 3b5e3c4 | 2010-09-18 06:35:29 +0800 | [diff] [blame] | 1032 | return; |
| 1033 | |
| 1034 | send_dlcx(endp, in_endp); |
| 1035 | send_dlcx(endp, out_endp); |
| 1036 | } |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1037 | |
| 1038 | int mgcp_reset_transcoder(struct mgcp_config *cfg) |
| 1039 | { |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1040 | if (!cfg->transcoder_ip) |
Holger Hans Peter Freyther | cf1c877 | 2010-09-24 04:41:28 +0800 | [diff] [blame] | 1041 | return 0; |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1042 | |
| 1043 | static const char mgcp_reset[] = { |
| 1044 | "RSIP 1 13@mgw MGCP 1.0\r\n" |
| 1045 | }; |
| 1046 | |
Holger Hans Peter Freyther | 557b1ab | 2010-09-19 04:39:55 +0800 | [diff] [blame] | 1047 | return send_trans(cfg, mgcp_reset, sizeof mgcp_reset -1); |
Holger Hans Peter Freyther | f2eedff | 2010-09-19 04:36:07 +0800 | [diff] [blame] | 1048 | } |