Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 1 | /* Run M2UA over SCTP here */ |
| 2 | /* (C) 2011 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU Affero General Public License as published by |
| 6 | * the Free Software Foundation; either version 3 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU Affero General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Affero General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #include <sctp_m2ua.h> |
| 19 | #include <bsc_data.h> |
| 20 | #include <cellmgr_debug.h> |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 21 | #include <counter.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 22 | #include <mtp_data.h> |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 23 | #include <mtp_pcap.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 24 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 25 | #include <osmocom/core/talloc.h> |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 26 | |
| 27 | #include <sys/socket.h> |
| 28 | #include <arpa/inet.h> |
| 29 | |
| 30 | #include <string.h> |
| 31 | #include <unistd.h> |
| 32 | |
Holger Hans Peter Freyther | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 33 | #define SCTP_PPID_M2UA 2 |
| 34 | |
Holger Hans Peter Freyther | ab79b9b | 2011-08-10 06:11:39 +0200 | [diff] [blame] | 35 | |
| 36 | int sctp_m2ua_conn_count(struct sctp_m2ua_transport *trans) |
| 37 | { |
| 38 | int count = 0; |
| 39 | struct sctp_m2ua_conn *conn; |
| 40 | |
| 41 | llist_for_each_entry(conn, &trans->conns, entry) |
| 42 | count += 1; |
| 43 | |
| 44 | return count; |
| 45 | } |
| 46 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 47 | static struct mtp_m2ua_link *find_m2ua_link(struct sctp_m2ua_transport *trans, int link_index) |
| 48 | { |
| 49 | struct mtp_m2ua_link *link; |
| 50 | link_index = link_index; |
| 51 | |
| 52 | llist_for_each_entry(link, &trans->links, entry) { |
| 53 | if (link->link_index == link_index) |
| 54 | return link; |
| 55 | } |
| 56 | |
| 57 | return NULL; |
| 58 | } |
| 59 | |
Holger Hans Peter Freyther | 4c1eb0e | 2011-01-22 15:52:07 +0100 | [diff] [blame] | 60 | static void link_down(struct mtp_link *link) |
| 61 | { |
| 62 | rate_ctr_inc(&link->ctrg->ctr[MTP_LNK_ERROR]); |
| 63 | mtp_link_down(link); |
| 64 | } |
| 65 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 66 | static void m2ua_conn_destroy(struct sctp_m2ua_conn *conn) |
| 67 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 68 | struct mtp_m2ua_link *link; |
| 69 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 70 | close(conn->queue.bfd.fd); |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 71 | osmo_fd_unregister(&conn->queue.bfd); |
| 72 | osmo_wqueue_clear(&conn->queue); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 73 | llist_del(&conn->entry); |
| 74 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 75 | llist_for_each_entry(link, &conn->trans->links, entry) { |
| 76 | if (link->conn != conn) |
| 77 | continue; |
| 78 | |
| 79 | if (link->established) |
| 80 | link_down(link->base); |
| 81 | link->established = 0; |
| 82 | link->asp_active = 0; |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 83 | link->active = 0; |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 84 | link->conn = NULL; |
| 85 | } |
| 86 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 87 | talloc_free(conn); |
| 88 | |
| 89 | #warning "Notify any other AS(P) for failover scenario" |
| 90 | } |
| 91 | |
| 92 | static int m2ua_conn_send(struct sctp_m2ua_conn *conn, |
| 93 | struct m2ua_msg *m2ua, |
| 94 | struct sctp_sndrcvinfo *info) |
| 95 | { |
| 96 | struct msgb *msg; |
| 97 | msg = m2ua_to_msg(m2ua); |
| 98 | if (!msg) |
| 99 | return -1; |
| 100 | |
| 101 | /* save the OOB data in front of the message */ |
| 102 | msg->l2h = msg->data; |
| 103 | msgb_push(msg, sizeof(*info)); |
| 104 | memcpy(msg->data, info, sizeof(*info)); |
| 105 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 106 | if (osmo_wqueue_enqueue(&conn->queue, msg) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 107 | LOGP(DINP, LOGL_ERROR, "Failed to enqueue.\n"); |
| 108 | msgb_free(msg); |
| 109 | return -1; |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 115 | static int m2ua_conn_send_ntfy(struct mtp_m2ua_link *link, |
| 116 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 117 | struct sctp_sndrcvinfo *info) |
| 118 | { |
| 119 | struct m2ua_msg *msg; |
| 120 | uint16_t state[2]; |
Holger Hans Peter Freyther | 41df6c5 | 2011-02-17 03:30:22 +0100 | [diff] [blame] | 121 | uint32_t ident; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 122 | int rc; |
| 123 | |
| 124 | msg = m2ua_msg_alloc(); |
| 125 | if (!msg) |
| 126 | return -1; |
| 127 | msg->hdr.msg_class = M2UA_CLS_MGMT; |
| 128 | msg->hdr.msg_type = M2UA_MGMT_NTFY; |
| 129 | |
| 130 | /* state change */ |
| 131 | state[0] = ntohs(M2UA_STP_AS_STATE_CHG); |
| 132 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 133 | if (link->asp_active) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 134 | state[1] = ntohs(M2UA_STP_AS_ACTIVE); |
| 135 | else |
| 136 | state[1] = ntohs(M2UA_STP_AS_INACTIVE); |
| 137 | |
| 138 | m2ua_msg_add_data(msg, MUA_TAG_STATUS, 4, (uint8_t *) state); |
| 139 | m2ua_msg_add_data(msg, MUA_TAG_ASP_IDENT, 4, conn->asp_ident); |
Holger Hans Peter Freyther | 41df6c5 | 2011-02-17 03:30:22 +0100 | [diff] [blame] | 140 | |
| 141 | ident = htonl(link->link_index); |
| 142 | m2ua_msg_add_data(msg, MUA_TAG_IDENT_INT, 4, (uint8_t *) &ident); |
| 143 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 144 | rc = m2ua_conn_send(conn, msg, info); |
| 145 | m2ua_msg_free(msg); |
| 146 | |
| 147 | return rc; |
| 148 | } |
| 149 | |
| 150 | static int m2ua_handle_asp_ack(struct sctp_m2ua_conn *conn, |
| 151 | struct m2ua_msg *m2ua, |
| 152 | struct sctp_sndrcvinfo *info) |
| 153 | { |
Holger Hans Peter Freyther | f2312cb | 2011-08-10 06:21:08 +0200 | [diff] [blame] | 154 | struct sctp_m2ua_transport *trans = conn->trans; |
| 155 | struct sctp_m2ua_conn *tmp; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 156 | struct m2ua_msg_part *asp_ident; |
| 157 | struct m2ua_msg *ack; |
| 158 | |
| 159 | asp_ident = m2ua_msg_find_tag(m2ua, MUA_TAG_ASP_IDENT); |
| 160 | if (!asp_ident) { |
| 161 | LOGP(DINP, LOGL_ERROR, "ASP UP lacks ASP IDENT\n"); |
| 162 | return -1; |
| 163 | } |
| 164 | if (asp_ident->len != 4) { |
| 165 | LOGP(DINP, LOGL_ERROR, "ASP Ident needs to be four byte.\n"); |
| 166 | return -1; |
| 167 | } |
| 168 | |
| 169 | /* TODO: Better handling for fail over is needed here */ |
| 170 | ack = m2ua_msg_alloc(); |
| 171 | if (!ack) { |
| 172 | LOGP(DINP, LOGL_ERROR, "Failed to create response\n"); |
| 173 | return -1; |
| 174 | } |
| 175 | |
| 176 | ack->hdr.msg_class = M2UA_CLS_ASPSM; |
| 177 | ack->hdr.msg_type = M2UA_ASPSM_UP_ACK; |
| 178 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 179 | m2ua_msg_free(ack); |
| 180 | return -1; |
| 181 | } |
| 182 | |
| 183 | memcpy(conn->asp_ident, asp_ident->dat, 4); |
| 184 | conn->asp_up = 1; |
| 185 | |
Holger Hans Peter Freyther | f2312cb | 2011-08-10 06:21:08 +0200 | [diff] [blame] | 186 | /* some verification about the ASPs */ |
| 187 | llist_for_each_entry(tmp, &trans->conns, entry) { |
| 188 | if (tmp != conn) |
| 189 | continue; |
| 190 | if (memcmp(tmp->asp_ident, conn->asp_ident, 4) != 0) |
| 191 | continue; |
| 192 | LOGP(DINP, LOGL_ERROR, |
| 193 | "Two active SCTP conns with %d.%d.%d.%d on %p, %p\n", |
| 194 | conn->asp_ident[0], conn->asp_ident[1], |
| 195 | conn->asp_ident[2], conn->asp_ident[3], |
| 196 | tmp, conn); |
| 197 | } |
| 198 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 199 | m2ua_msg_free(ack); |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | static int m2ua_handle_asp(struct sctp_m2ua_conn *conn, |
| 204 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 205 | { |
| 206 | switch (m2ua->hdr.msg_type) { |
| 207 | case M2UA_ASPSM_UP: |
| 208 | m2ua_handle_asp_ack(conn, m2ua, info); |
| 209 | break; |
| 210 | default: |
| 211 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 212 | m2ua->hdr.msg_type); |
| 213 | break; |
| 214 | } |
| 215 | |
| 216 | return 0; |
| 217 | } |
| 218 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 219 | static int m2ua_handle_asptm_act(struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 220 | struct m2ua_msg *m2ua, |
| 221 | struct sctp_sndrcvinfo *info) |
| 222 | { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 223 | struct m2ua_msg_part *part; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 224 | struct m2ua_msg *ack; |
| 225 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 226 | ack = m2ua_msg_alloc(); |
| 227 | if (!ack) |
| 228 | return -1; |
| 229 | |
| 230 | ack->hdr.msg_class = M2UA_CLS_ASPTM; |
| 231 | ack->hdr.msg_type = M2UA_ASPTM_ACTIV_ACK; |
| 232 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 233 | /* |
| 234 | * Move things over to this connection now. |
| 235 | */ |
| 236 | llist_for_each_entry(part, &m2ua->headers, entry) { |
| 237 | struct mtp_m2ua_link *link; |
| 238 | uint32_t interf; |
| 239 | |
| 240 | |
| 241 | if (part->tag != MUA_TAG_IDENT_INT) |
| 242 | continue; |
| 243 | if (part->len != 4) |
| 244 | continue; |
| 245 | |
| 246 | memcpy(&interf, part->dat, 4); |
| 247 | link = find_m2ua_link(conn->trans, ntohl(interf)); |
| 248 | if (!link) { |
| 249 | LOGP(DINP, LOGL_ERROR, |
| 250 | "M2UA Link index %d is not configured.\n", ntohl(interf)); |
| 251 | continue; |
| 252 | } |
| 253 | |
| 254 | link->conn = conn; |
| 255 | link->asp_active = 1; |
| 256 | m2ua_msg_add_data(ack, MUA_TAG_IDENT_INT, 4, (uint8_t *) &interf); |
| 257 | } |
| 258 | |
| 259 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 260 | if (m2ua_conn_send(conn, ack, info) != 0) { |
| 261 | m2ua_msg_free(ack); |
| 262 | return -1; |
| 263 | } |
| 264 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 265 | /* now again send NTFY on all these links */ |
| 266 | llist_for_each_entry(part, &m2ua->headers, entry) { |
| 267 | struct mtp_m2ua_link *link; |
| 268 | uint32_t interf; |
| 269 | |
| 270 | |
| 271 | if (part->tag != MUA_TAG_IDENT_INT) |
| 272 | continue; |
| 273 | if (part->len != 4) |
| 274 | continue; |
| 275 | |
| 276 | memcpy(&interf, part->dat, 4); |
| 277 | link = find_m2ua_link(conn->trans, ntohl(interf)); |
| 278 | if (!link) |
| 279 | continue; |
| 280 | m2ua_conn_send_ntfy(link, conn, info); |
| 281 | } |
| 282 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 283 | m2ua_msg_free(ack); |
| 284 | return 0; |
| 285 | } |
| 286 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 287 | static int m2ua_handle_asptm(struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 288 | struct m2ua_msg *m2ua, |
| 289 | struct sctp_sndrcvinfo *info) |
| 290 | { |
| 291 | switch (m2ua->hdr.msg_type) { |
| 292 | case M2UA_ASPTM_ACTIV: |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 293 | m2ua_handle_asptm_act(conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 294 | break; |
| 295 | default: |
| 296 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 297 | m2ua->hdr.msg_type); |
| 298 | break; |
| 299 | } |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 304 | static int m2ua_handle_state_req(struct mtp_m2ua_link *link, |
| 305 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 306 | struct m2ua_msg *m2ua, |
| 307 | struct sctp_sndrcvinfo *info) |
| 308 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 309 | struct m2ua_msg_part *state; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 310 | struct m2ua_msg *conf; |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 311 | uint32_t index; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 312 | int req; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 313 | |
| 314 | state = m2ua_msg_find_tag(m2ua, M2UA_TAG_STATE_REQ); |
| 315 | if (!state || state->len != 4) { |
| 316 | LOGP(DINP, LOGL_ERROR, "Mandantory state request not present.\n"); |
| 317 | return -1; |
| 318 | } |
| 319 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 320 | memcpy(&req, state->dat, 4); |
| 321 | req = ntohl(req); |
| 322 | |
| 323 | switch (req) { |
| 324 | case M2UA_STATUS_EMER_SET: |
| 325 | conf = m2ua_msg_alloc(); |
| 326 | if (!conf) |
| 327 | return -1; |
| 328 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 329 | index = htonl(link->link_index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 330 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 331 | conf->hdr.msg_type = M2UA_MAUP_STATE_CON; |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 332 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 333 | m2ua_msg_add_data(conf, M2UA_TAG_STATE_REQ, 4, (uint8_t *) &req); |
| 334 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 335 | m2ua_msg_free(conf); |
| 336 | return -1; |
| 337 | } |
| 338 | m2ua_msg_free(conf); |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 339 | |
| 340 | LOGP(DINP, LOGL_NOTICE, "M2UA link-index %d is running.\n", link->link_index); |
| 341 | link->active = 1; |
| 342 | mtp_link_up(link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 343 | break; |
| 344 | default: |
| 345 | LOGP(DINP, LOGL_ERROR, "Unknown STATE Request: %d\n", req); |
| 346 | break; |
| 347 | } |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 352 | static int m2ua_handle_est_req(struct mtp_m2ua_link *link, |
| 353 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 354 | struct m2ua_msg *m2ua, |
| 355 | struct sctp_sndrcvinfo *info) |
| 356 | { |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 357 | uint32_t index; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 358 | struct m2ua_msg *conf; |
| 359 | |
| 360 | conf = m2ua_msg_alloc(); |
| 361 | if (!conf) |
| 362 | return -1; |
| 363 | |
| 364 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 365 | conf->hdr.msg_type = M2UA_MAUP_EST_CON; |
| 366 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 367 | index = htonl(link->link_index); |
| 368 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
| 369 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 370 | if (m2ua_conn_send(conn, conf, info) != 0) { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 371 | link->established = 0; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 372 | m2ua_msg_free(conf); |
| 373 | return -1; |
| 374 | } |
| 375 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 376 | link->established = 1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 377 | m2ua_msg_free(conf); |
| 378 | return 0; |
| 379 | } |
| 380 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 381 | static int m2ua_handle_rel_req(struct mtp_m2ua_link *link, |
| 382 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 383 | struct m2ua_msg *m2ua, |
| 384 | struct sctp_sndrcvinfo *info) |
| 385 | { |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 386 | uint32_t index; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 387 | struct m2ua_msg *conf; |
| 388 | |
| 389 | conf = m2ua_msg_alloc(); |
| 390 | if (!conf) |
| 391 | return -1; |
| 392 | |
| 393 | conf->hdr.msg_class = M2UA_CLS_MAUP; |
| 394 | conf->hdr.msg_type = M2UA_MAUP_REL_CON; |
| 395 | |
Holger Hans Peter Freyther | e62e4b0 | 2011-02-17 23:29:41 +0100 | [diff] [blame] | 396 | index = htonl(link->link_index); |
| 397 | m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index); |
| 398 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 399 | if (m2ua_conn_send(conn, conf, info) != 0) { |
| 400 | m2ua_msg_free(conf); |
| 401 | return -1; |
| 402 | } |
| 403 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 404 | link->established = 0; |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 405 | link->active = 0; |
Holger Hans Peter Freyther | 123147a | 2011-03-03 00:58:44 +0100 | [diff] [blame] | 406 | LOGP(DINP, LOGL_NOTICE, "M2UA/Link link-index %d is released.\n", link->link_index); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 407 | link_down(link->base); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 408 | m2ua_msg_free(conf); |
| 409 | return 0; |
| 410 | } |
| 411 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 412 | static int m2ua_handle_data(struct mtp_m2ua_link *_link, |
| 413 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 414 | struct m2ua_msg *m2ua, |
| 415 | struct sctp_sndrcvinfo *info) |
| 416 | { |
| 417 | struct msgb *msg; |
| 418 | struct m2ua_msg_part *data; |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 419 | struct mtp_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 420 | |
| 421 | data = m2ua_msg_find_tag(m2ua, M2UA_TAG_DATA); |
| 422 | if (!data) { |
| 423 | LOGP(DINP, LOGL_ERROR, "No DATA in DATA message.\n"); |
| 424 | return -1; |
| 425 | } |
| 426 | |
| 427 | if (data->len > 2048) { |
| 428 | LOGP(DINP, LOGL_ERROR, "TOO much data for us to handle.\n"); |
| 429 | return -1; |
| 430 | } |
| 431 | |
| 432 | msg = msgb_alloc(2048, "m2ua-data"); |
| 433 | if (!msg) { |
| 434 | LOGP(DINP, LOGL_ERROR, "Failed to allocate storage.\n"); |
| 435 | return -1; |
| 436 | } |
| 437 | |
| 438 | msg->l2h = msgb_put(msg, data->len); |
| 439 | memcpy(msg->l2h, data->dat, data->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 440 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 441 | link = _link->base; |
Holger Hans Peter Freyther | ea5ce23 | 2011-01-23 23:31:26 +0100 | [diff] [blame] | 442 | if (!link->blocked) { |
| 443 | mtp_handle_pcap(link, NET_IN, msg->l2h, msgb_l2len(msg)); |
| 444 | mtp_link_set_data(link, msg); |
| 445 | } |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 446 | msgb_free(msg); |
| 447 | |
| 448 | return 0; |
| 449 | } |
| 450 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 451 | static int m2ua_handle_maup(struct mtp_m2ua_link *link, |
| 452 | struct sctp_m2ua_conn *conn, |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 453 | struct m2ua_msg *m2ua, |
| 454 | struct sctp_sndrcvinfo *info) |
| 455 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 456 | if (!link) { |
| 457 | LOGP(DINP, LOGL_ERROR, "Link is required.\n"); |
| 458 | return -1; |
| 459 | } |
| 460 | |
Holger Hans Peter Freyther | a79aff3 | 2011-08-10 06:40:17 +0200 | [diff] [blame] | 461 | /* fixup for a broken MSC */ |
| 462 | if (!link->conn && m2ua->hdr.msg_type == M2UA_MAUP_STATE_REQ) { |
| 463 | LOGP(DINP, LOGL_NOTICE, |
| 464 | "No ASP Activate but no connection is on link-index %d.\n", |
| 465 | link->link_index); |
| 466 | link->conn = conn; |
| 467 | link->asp_active = 1; |
| 468 | } |
| 469 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 470 | if (link->conn != conn) { |
| 471 | LOGP(DINP, LOGL_ERROR, |
| 472 | "Someone forgot the ASP Activate on link-index %d\n", |
| 473 | link->link_index); |
| 474 | return -1; |
| 475 | } |
| 476 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 477 | switch (m2ua->hdr.msg_type) { |
| 478 | case M2UA_MAUP_STATE_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 479 | m2ua_handle_state_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 480 | break; |
| 481 | case M2UA_MAUP_EST_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 482 | m2ua_handle_est_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 483 | break; |
| 484 | case M2UA_MAUP_REL_REQ: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 485 | m2ua_handle_rel_req(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 486 | break; |
| 487 | case M2UA_MAUP_DATA: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 488 | m2ua_handle_data(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 489 | break; |
| 490 | default: |
| 491 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_type %d\n", |
| 492 | m2ua->hdr.msg_type); |
| 493 | break; |
| 494 | } |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | static int m2ua_handle_mgmt(struct sctp_m2ua_conn *conn, |
| 500 | struct m2ua_msg *m2ua, struct sctp_sndrcvinfo *info) |
| 501 | { |
| 502 | switch (m2ua->hdr.msg_type) { |
| 503 | case M2UA_MGMT_ERROR: |
| 504 | LOGP(DINP, LOGL_ERROR, "We did something wrong. Error...\n"); |
| 505 | break; |
| 506 | case M2UA_MGMT_NTFY: |
| 507 | LOGP(DINP, LOGL_NOTICE, "There was a notiy.. but we should only send it.\n"); |
| 508 | break; |
| 509 | } |
| 510 | |
| 511 | return 0; |
| 512 | } |
| 513 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 514 | static int m2ua_find_interface(struct m2ua_msg *m2ua, int def) |
| 515 | { |
| 516 | struct m2ua_msg_part *ident; |
| 517 | |
| 518 | ident = m2ua_msg_find_tag(m2ua, MUA_TAG_IDENT_INT); |
| 519 | if (ident && ident->len == 4) { |
| 520 | memcpy(&def, ident->dat, 4); |
| 521 | def = ntohl(def); |
| 522 | } |
| 523 | |
| 524 | return def; |
| 525 | } |
| 526 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 527 | static int m2ua_conn_handle(struct sctp_m2ua_conn *conn, |
| 528 | struct msgb *msg, struct sctp_sndrcvinfo *info) |
| 529 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 530 | struct mtp_m2ua_link *link; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 531 | struct m2ua_msg *m2ua; |
| 532 | m2ua = m2ua_from_msg(msg->len, msg->data); |
| 533 | if (!m2ua) { |
| 534 | LOGP(DINP, LOGL_ERROR, "Failed to parse the message.\n"); |
| 535 | return -1; |
| 536 | } |
| 537 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 538 | link = find_m2ua_link(conn->trans, m2ua_find_interface(m2ua, 0)); |
| 539 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 540 | switch (m2ua->hdr.msg_class) { |
| 541 | case M2UA_CLS_MGMT: |
| 542 | m2ua_handle_mgmt(conn, m2ua, info); |
| 543 | break; |
| 544 | case M2UA_CLS_ASPSM: |
| 545 | m2ua_handle_asp(conn, m2ua, info); |
| 546 | break; |
| 547 | case M2UA_CLS_ASPTM: |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 548 | m2ua_handle_asptm(conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 549 | break; |
| 550 | case M2UA_CLS_MAUP: |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 551 | m2ua_handle_maup(link, conn, m2ua, info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 552 | break; |
| 553 | default: |
| 554 | LOGP(DINP, LOGL_ERROR, "Unhandled msg_class %d\n", |
| 555 | m2ua->hdr.msg_class); |
| 556 | break; |
| 557 | } |
| 558 | |
| 559 | m2ua_msg_free(m2ua); |
| 560 | return 0; |
| 561 | } |
| 562 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 563 | static int m2ua_conn_read(struct osmo_fd *fd) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 564 | { |
| 565 | struct sockaddr_in addr; |
| 566 | struct sctp_sndrcvinfo info; |
| 567 | socklen_t len = sizeof(addr); |
| 568 | struct msgb *msg; |
| 569 | int rc; |
| 570 | |
| 571 | msg = msgb_alloc(2048, "m2ua buffer"); |
| 572 | if (!msg) { |
| 573 | LOGP(DINP, LOGL_ERROR, "Failed to allocate buffer.\n"); |
| 574 | m2ua_conn_destroy(fd->data); |
| 575 | return -1; |
| 576 | } |
| 577 | |
| 578 | memset(&info, 0, sizeof(info)); |
| 579 | memset(&addr, 0, sizeof(addr)); |
| 580 | rc = sctp_recvmsg(fd->fd, msg->data, msg->data_len, |
| 581 | (struct sockaddr *) &addr, &len, &info, NULL); |
Holger Hans Peter Freyther | c5562bd | 2011-01-26 11:02:42 +0100 | [diff] [blame] | 582 | if (rc <= 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 583 | LOGP(DINP, LOGL_ERROR, "Failed to read.\n"); |
Holger Hans Peter Freyther | a2938fe | 2011-02-25 19:48:24 +0100 | [diff] [blame] | 584 | msgb_free(msg); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 585 | m2ua_conn_destroy(fd->data); |
| 586 | return -1; |
| 587 | } |
| 588 | |
Holger Hans Peter Freyther | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 589 | if (ntohl(info.sinfo_ppid) != SCTP_PPID_M2UA) { |
| 590 | LOGP(DINP, LOGL_ERROR, "Only M2UA is allowed on this socket.\n"); |
| 591 | msgb_free(msg); |
| 592 | return -1; |
| 593 | } |
| 594 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 595 | msgb_put(msg, rc); |
Holger Hans Peter Freyther | 5e5758c | 2011-02-17 18:18:22 +0100 | [diff] [blame] | 596 | LOGP(DINP, LOGL_DEBUG, "Read %d on stream: %d ssn: %d assoc: %d\n", |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 597 | rc, info.sinfo_stream, info.sinfo_ssn, info.sinfo_assoc_id); |
| 598 | m2ua_conn_handle(fd->data, msg, &info); |
| 599 | msgb_free(msg); |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static int sctp_m2ua_write(struct mtp_link *link, struct msgb *msg) |
| 604 | { |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 605 | struct mtp_m2ua_link *mlink; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 606 | struct sctp_sndrcvinfo info; |
| 607 | struct m2ua_msg *m2ua; |
| 608 | uint32_t interface; |
| 609 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 610 | mlink = (struct mtp_m2ua_link *) link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 611 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 612 | |
| 613 | if (!mlink->conn) { |
| 614 | LOGP(DINP, LOGL_ERROR, "M2UA write with no ASP for %d/%s of %d/%s.\n", |
| 615 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 616 | goto clean; |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 617 | } |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 618 | |
Holger Hans Peter Freyther | 4cee7c0 | 2011-02-17 18:41:33 +0100 | [diff] [blame] | 619 | if (!mlink->asp_active || !mlink->established || !mlink->active) { |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 620 | LOGP(DINP, LOGL_ERROR, "ASP not ready for %d/%s of %d/%s.\n", |
| 621 | link->nr, link->name, link->set->nr, link->set->name); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 622 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | m2ua = m2ua_msg_alloc(); |
| 626 | if (!m2ua) |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 627 | goto clean; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 628 | |
Holger Hans Peter Freyther | 36260e9 | 2011-01-22 17:37:56 +0100 | [diff] [blame] | 629 | mtp_handle_pcap(link, NET_OUT, msg->data, msg->len); |
Holger Hans Peter Freyther | c17852e | 2011-01-17 22:23:24 +0100 | [diff] [blame] | 630 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 631 | m2ua->hdr.msg_class = M2UA_CLS_MAUP; |
| 632 | m2ua->hdr.msg_type = M2UA_MAUP_DATA; |
| 633 | |
Holger Hans Peter Freyther | 7e8ee3a | 2011-03-02 22:00:24 +0100 | [diff] [blame] | 634 | interface = htonl(mlink->link_index); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 635 | m2ua_msg_add_data(m2ua, MUA_TAG_IDENT_INT, 4, (uint8_t *) &interface); |
| 636 | m2ua_msg_add_data(m2ua, M2UA_TAG_DATA, msg->len, msg->data); |
| 637 | |
| 638 | memset(&info, 0, sizeof(info)); |
| 639 | info.sinfo_stream = 1; |
| 640 | info.sinfo_assoc_id = 1; |
Holger Hans Peter Freyther | 718d4ba | 2011-02-25 19:47:55 +0100 | [diff] [blame] | 641 | info.sinfo_ppid = htonl(SCTP_PPID_M2UA); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 642 | |
Holger Hans Peter Freyther | 8fd28db | 2011-02-17 14:55:55 +0100 | [diff] [blame] | 643 | m2ua_conn_send(mlink->conn, m2ua, &info); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 644 | m2ua_msg_free(m2ua); |
Holger Hans Peter Freyther | 1927e63 | 2011-02-15 16:51:43 +0100 | [diff] [blame] | 645 | |
| 646 | clean: |
| 647 | msgb_free(msg); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 648 | return 0; |
| 649 | } |
| 650 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 651 | static int m2ua_conn_write(struct osmo_fd *fd, struct msgb *msg) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 652 | { |
| 653 | int ret; |
| 654 | struct sctp_sndrcvinfo info; |
| 655 | memcpy(&info, msg->data, sizeof(info)); |
| 656 | |
| 657 | ret = sctp_send(fd->fd, msg->l2h, msgb_l2len(msg), |
| 658 | &info, 0); |
| 659 | |
| 660 | if (ret != msgb_l2len(msg)) |
| 661 | LOGP(DINP, LOGL_ERROR, "Failed to send %d.\n", ret); |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 666 | static int sctp_trans_accept(struct osmo_fd *fd, unsigned int what) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 667 | { |
| 668 | struct sctp_event_subscribe events; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 669 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 670 | struct sctp_m2ua_conn *conn; |
| 671 | struct sockaddr_in addr; |
| 672 | socklen_t len; |
Holger Hans Peter Freyther | ab79b9b | 2011-08-10 06:11:39 +0200 | [diff] [blame] | 673 | int s, ret, count; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 674 | |
| 675 | len = sizeof(addr); |
| 676 | s = accept(fd->fd, (struct sockaddr *) &addr, &len); |
| 677 | if (s < 0) { |
| 678 | LOGP(DINP, LOGL_ERROR, "Failed to accept.\n"); |
| 679 | return -1; |
| 680 | } |
| 681 | |
| 682 | trans = fd->data; |
| 683 | if (!trans->started) { |
| 684 | LOGP(DINP, LOGL_NOTICE, "The link is not started.\n"); |
| 685 | close(s); |
| 686 | return -1; |
| 687 | } |
| 688 | |
Holger Hans Peter Freyther | 0e6cbc6 | 2011-02-25 19:42:51 +0100 | [diff] [blame] | 689 | memset(&events, 0, sizeof(events)); |
| 690 | events.sctp_data_io_event = 1; |
| 691 | ret = setsockopt(s, SOL_SCTP, SCTP_EVENTS, &events, sizeof(events)); |
| 692 | if (ret != 0) { |
| 693 | LOGP(DINP, LOGL_ERROR, "Failed to enable SCTP Events. Closing socket.\n"); |
| 694 | close(s); |
| 695 | return -1; |
| 696 | } |
| 697 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 698 | LOGP(DINP, LOGL_NOTICE, "Got a new SCTP connection.\n"); |
| 699 | conn = talloc_zero(fd->data, struct sctp_m2ua_conn); |
| 700 | if (!conn) { |
| 701 | LOGP(DINP, LOGL_ERROR, "Failed to create.\n"); |
| 702 | close(s); |
| 703 | return -1; |
| 704 | } |
| 705 | |
| 706 | conn->trans = trans; |
| 707 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 708 | osmo_wqueue_init(&conn->queue, 10); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 709 | conn->queue.bfd.fd = s; |
| 710 | conn->queue.bfd.data = conn; |
| 711 | conn->queue.bfd.when = BSC_FD_READ; |
| 712 | conn->queue.read_cb = m2ua_conn_read; |
| 713 | conn->queue.write_cb = m2ua_conn_write; |
| 714 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 715 | if (osmo_fd_register(&conn->queue.bfd) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 716 | LOGP(DINP, LOGL_ERROR, "Failed to register.\n"); |
| 717 | close(s); |
| 718 | talloc_free(conn); |
| 719 | return -1; |
| 720 | } |
| 721 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 722 | llist_add_tail(&conn->entry, &trans->conns); |
Holger Hans Peter Freyther | ab79b9b | 2011-08-10 06:11:39 +0200 | [diff] [blame] | 723 | |
| 724 | |
| 725 | count = sctp_m2ua_conn_count(trans); |
| 726 | LOGP(DINP, LOGL_NOTICE, "Now having %d SCTP connection(s).\n", count); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 727 | return 0; |
| 728 | } |
| 729 | |
| 730 | static int sctp_m2ua_dummy(struct mtp_link *link) |
| 731 | { |
| 732 | return 0; |
| 733 | } |
| 734 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 735 | static int sctp_m2ua_start(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 736 | { |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 737 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 738 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 739 | link->transport->started = 1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 740 | return 0; |
| 741 | } |
| 742 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 743 | static int sctp_m2ua_reset(struct mtp_link *_link) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 744 | { |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 745 | struct mtp_m2ua_link *link = (struct mtp_m2ua_link *) _link->data; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 746 | |
Holger Hans Peter Freyther | 7c6feca | 2011-02-17 15:15:28 +0100 | [diff] [blame] | 747 | /* |
| 748 | * TODO: Send a Release Indication? Send NTFY to other ASPs to |
| 749 | * ask them to activate the link? What should we do here? Right |
| 750 | * now do exactly nothing. |
| 751 | */ |
| 752 | LOGP(DINP, LOGL_ERROR, |
| 753 | "M2UA link-index %d not doing the reset.\n", link->link_index); |
| 754 | |
| 755 | if (link->conn && link->asp_active && link->established) |
| 756 | mtp_link_start_link_test(_link); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 757 | |
| 758 | return 0; |
| 759 | } |
| 760 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 761 | struct sctp_m2ua_transport *sctp_m2ua_transp_create(struct bsc_data *bsc) |
| 762 | { |
| 763 | struct sctp_m2ua_transport *trans; |
| 764 | |
| 765 | trans = talloc_zero(bsc, struct sctp_m2ua_transport); |
| 766 | if (!trans) { |
| 767 | LOGP(DINP, LOGL_ERROR, "Remove the talloc.\n"); |
| 768 | return NULL; |
| 769 | } |
| 770 | |
| 771 | INIT_LLIST_HEAD(&trans->conns); |
| 772 | INIT_LLIST_HEAD(&trans->links); |
| 773 | |
| 774 | |
| 775 | return trans; |
| 776 | } |
| 777 | |
| 778 | int sctp_m2ua_transport_bind(struct sctp_m2ua_transport *trans, |
| 779 | const char *ip, int port) |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 780 | { |
| 781 | int sctp; |
| 782 | struct sockaddr_in addr; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 783 | |
| 784 | sctp = socket(PF_INET, SOCK_STREAM, IPPROTO_SCTP); |
| 785 | if (!sctp) { |
| 786 | LOGP(DINP, LOGL_ERROR, "Failed to create socket.\n"); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 787 | return -1; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | memset(&addr, 0, sizeof(addr)); |
| 791 | addr.sin_family = AF_INET; |
| 792 | addr.sin_port = htons(port); |
| 793 | addr.sin_addr.s_addr = inet_addr(ip); |
| 794 | |
| 795 | if (bind(sctp, (struct sockaddr *) &addr, sizeof(addr)) != 0) { |
| 796 | LOGP(DINP, LOGL_ERROR, "Failed to bind.\n"); |
| 797 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 798 | return -2; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | if (listen(sctp, 1) != 0) { |
| 802 | LOGP(DINP, LOGL_ERROR, "Failed to listen.\n"); |
| 803 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 804 | return -3; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | int on = 1; |
| 808 | setsockopt(sctp, SOL_SCTP, 112, &on, sizeof(on)); |
| 809 | |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 810 | trans->bsc.fd = sctp; |
| 811 | trans->bsc.data = trans; |
| 812 | trans->bsc.cb = sctp_trans_accept; |
| 813 | trans->bsc.when = BSC_FD_READ; |
| 814 | |
Harald Welte | ff397ed | 2011-05-08 10:29:23 +0200 | [diff] [blame] | 815 | if (osmo_fd_register(&trans->bsc) != 0) { |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 816 | LOGP(DINP, LOGL_ERROR, "Failed to register the fd.\n"); |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 817 | close(sctp); |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 818 | return -4; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 819 | } |
| 820 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 821 | return 0; |
Holger Hans Peter Freyther | d70a7e8 | 2011-01-17 14:13:29 +0100 | [diff] [blame] | 822 | } |
| 823 | |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 824 | struct mtp_m2ua_link *mtp_m2ua_link_init(struct mtp_link *blnk) |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 825 | { |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 826 | struct sctp_m2ua_transport *trans; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 827 | struct mtp_m2ua_link *lnk; |
| 828 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 829 | lnk = talloc_zero(blnk, struct mtp_m2ua_link); |
| 830 | if (!lnk) { |
| 831 | LOGP(DINP, LOGL_ERROR, "Failed to allocate.\n"); |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 832 | return NULL; |
| 833 | } |
| 834 | |
| 835 | /* make sure we can resolve it both ways */ |
| 836 | lnk->base = blnk; |
| 837 | blnk->data = lnk; |
| 838 | blnk->type = SS7_LTYPE_M2UA; |
| 839 | |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 840 | /* remember we have a link here */ |
Holger Hans Peter Freyther | 7176030 | 2011-02-22 20:57:08 +0100 | [diff] [blame] | 841 | trans = blnk->set->bsc->m2ua_trans; |
Holger Hans Peter Freyther | 169a1a9 | 2011-02-22 15:45:52 +0100 | [diff] [blame] | 842 | llist_add_tail(&lnk->entry, &trans->links); |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 843 | |
Holger Hans Peter Freyther | 6c0b2e5 | 2011-02-17 02:18:38 +0100 | [diff] [blame] | 844 | lnk->base->shutdown = sctp_m2ua_reset; |
| 845 | lnk->base->clear_queue = sctp_m2ua_dummy; |
| 846 | lnk->base->reset = sctp_m2ua_reset; |
| 847 | lnk->base->start = sctp_m2ua_start; |
| 848 | lnk->base->write = sctp_m2ua_write; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 849 | |
Holger Hans Peter Freyther | b27c962 | 2011-02-16 23:47:25 +0100 | [diff] [blame] | 850 | lnk->transport = trans; |
Holger Hans Peter Freyther | f7ce2c6 | 2011-02-15 15:45:32 +0100 | [diff] [blame] | 851 | return lnk; |
| 852 | } |