1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/systm.h> 28 #include <sys/stream.h> 29 #include <sys/cmn_err.h> 30 #include <sys/tihdr.h> 31 #include <sys/kmem.h> 32 #define _SUN_TPI_VERSION 2 33 #include <sys/tihdr.h> 34 #include <sys/socket.h> 35 36 #include <netinet/in.h> 37 #include <netinet/sctp.h> 38 39 #include <inet/common.h> 40 #include <inet/ipclassifier.h> 41 #include <inet/ip.h> 42 43 #include "sctp_impl.h" 44 45 /* ARGSUSED */ 46 static void 47 sctp_notify(sctp_t *sctp, mblk_t *emp, size_t len) 48 { 49 struct T_unitdata_ind *tudi; 50 mblk_t *mp; 51 sctp_faddr_t *fp; 52 int32_t rwnd = 0; 53 int error; 54 55 if ((mp = allocb(sizeof (*tudi) + sizeof (void *) + 56 sizeof (struct sockaddr_in6), BPRI_HI)) == NULL) { 57 /* XXX trouble: don't want to drop events. should queue it. */ 58 freemsg(emp); 59 return; 60 } 61 dprint(3, ("sctp_notify: event %d\n", (*(uint16_t *)emp->b_rptr))); 62 63 mp->b_datap->db_type = M_PROTO; 64 mp->b_flag |= MSGMARK; 65 mp->b_rptr += sizeof (void *); /* pointer worth of padding */ 66 67 tudi = (struct T_unitdata_ind *)mp->b_rptr; 68 tudi->PRIM_type = T_UNITDATA_IND; 69 tudi->SRC_offset = sizeof (*tudi); 70 tudi->OPT_length = 0; 71 tudi->OPT_offset = 0; 72 73 fp = sctp->sctp_primary; 74 ASSERT(fp); 75 76 /* 77 * Fill in primary remote address. 78 */ 79 if (IN6_IS_ADDR_V4MAPPED(&fp->faddr)) { 80 struct sockaddr_in *sin4; 81 82 tudi->SRC_length = sizeof (*sin4); 83 sin4 = (struct sockaddr_in *)(tudi + 1); 84 sin4->sin_family = AF_INET; 85 sin4->sin_port = sctp->sctp_fport; 86 IN6_V4MAPPED_TO_IPADDR(&fp->faddr, sin4->sin_addr.s_addr); 87 mp->b_wptr = (uchar_t *)(sin4 + 1); 88 } else { 89 struct sockaddr_in6 *sin6; 90 91 tudi->SRC_length = sizeof (*sin6); 92 sin6 = (struct sockaddr_in6 *)(tudi + 1); 93 sin6->sin6_family = AF_INET6; 94 sin6->sin6_port = sctp->sctp_fport; 95 sin6->sin6_addr = fp->faddr; 96 mp->b_wptr = (uchar_t *)(sin6 + 1); 97 } 98 99 mp->b_cont = emp; 100 101 /* 102 * Notifications are queued regardless of socket rx space. So 103 * we do not decrement sctp_rwnd here as this will confuse the 104 * other side. 105 */ 106 #ifdef DEBUG 107 for (emp = mp->b_cont; emp; emp = emp->b_cont) { 108 rwnd += emp->b_wptr - emp->b_rptr; 109 } 110 ASSERT(len == rwnd); 111 #endif 112 113 /* 114 * Override b_flag for SCTP sockfs internal use 115 */ 116 mp->b_flag = (short)SCTP_NOTIFICATION; 117 118 rwnd = sctp->sctp_ulp_recv(sctp->sctp_ulpd, mp, msgdsize(mp), 0, 119 &error, NULL); 120 if (rwnd > sctp->sctp_rwnd) { 121 sctp->sctp_rwnd = rwnd; 122 } 123 } 124 125 void 126 sctp_assoc_event(sctp_t *sctp, uint16_t state, uint16_t error, 127 sctp_chunk_hdr_t *ch) 128 { 129 struct sctp_assoc_change *sacp; 130 mblk_t *mp; 131 uint16_t ch_len; 132 133 if (!sctp->sctp_recvassocevnt) { 134 return; 135 } 136 137 ch_len = (ch != NULL) ? ntohs(ch->sch_len) : 0; 138 139 if ((mp = allocb(sizeof (*sacp) + ch_len, BPRI_MED)) == NULL) { 140 return; 141 } 142 143 sacp = (struct sctp_assoc_change *)mp->b_rptr; 144 sacp->sac_type = SCTP_ASSOC_CHANGE; 145 sacp->sac_flags = sctp->sctp_prsctp_aware ? SCTP_PRSCTP_CAPABLE : 0; 146 sacp->sac_length = sizeof (*sacp) + ch_len; 147 sacp->sac_state = state; 148 sacp->sac_error = error; 149 sacp->sac_outbound_streams = sctp->sctp_num_ostr; 150 sacp->sac_inbound_streams = sctp->sctp_num_istr; 151 sacp->sac_assoc_id = 0; 152 153 if (ch != NULL) 154 bcopy(ch, sacp + 1, ch_len); 155 mp->b_wptr += sacp->sac_length; 156 sctp_notify(sctp, mp, sacp->sac_length); 157 } 158 159 /* 160 * Send failure event. Message is expected to have message header still 161 * in place, data follows in subsequent mblk's. 162 */ 163 static void 164 sctp_sendfail(sctp_t *sctp, mblk_t *msghdr, uint16_t flags, int error) 165 { 166 struct sctp_send_failed *sfp; 167 mblk_t *mp; 168 sctp_msg_hdr_t *smh; 169 170 /* Allocate a mblk for the notification header */ 171 if ((mp = allocb(sizeof (*sfp), BPRI_MED)) == NULL) { 172 /* give up */ 173 freemsg(msghdr); 174 return; 175 } 176 177 smh = (sctp_msg_hdr_t *)msghdr->b_rptr; 178 sfp = (struct sctp_send_failed *)mp->b_rptr; 179 sfp->ssf_type = SCTP_SEND_FAILED; 180 sfp->ssf_flags = flags; 181 sfp->ssf_length = smh->smh_msglen + sizeof (*sfp); 182 sfp->ssf_error = error; 183 sfp->ssf_assoc_id = 0; 184 185 bzero(&sfp->ssf_info, sizeof (sfp->ssf_info)); 186 sfp->ssf_info.sinfo_stream = smh->smh_sid; 187 sfp->ssf_info.sinfo_flags = smh->smh_flags; 188 sfp->ssf_info.sinfo_ppid = smh->smh_ppid; 189 sfp->ssf_info.sinfo_context = smh->smh_context; 190 sfp->ssf_info.sinfo_timetolive = TICK_TO_MSEC(smh->smh_ttl); 191 192 mp->b_wptr = (uchar_t *)(sfp + 1); 193 mp->b_cont = msghdr->b_cont; 194 195 freeb(msghdr); 196 197 sctp_notify(sctp, mp, sfp->ssf_length); 198 199 } 200 201 /* 202 * Send failure when the message has been fully chunkified. 203 */ 204 static void 205 sctp_sendfail_sent(sctp_t *sctp, mblk_t *meta, int error) 206 { 207 mblk_t *mp; 208 mblk_t *nmp; 209 mblk_t *tail; 210 uint16_t flags = SCTP_DATA_SENT; 211 212 if (!sctp->sctp_recvsendfailevnt) { 213 sctp_free_msg(meta); 214 return; 215 } 216 217 /* 218 * We need to remove all data_hdr's. 219 */ 220 nmp = meta->b_cont; 221 tail = meta; 222 do { 223 mp = nmp->b_next; 224 nmp->b_next = NULL; 225 226 /* 227 * If one of the chunks hasn't been sent yet, say that 228 * the message hasn't been sent. 229 */ 230 if (!SCTP_CHUNK_ISSENT(nmp)) { 231 flags = SCTP_DATA_UNSENT; 232 } 233 nmp->b_rptr += sizeof (sctp_data_hdr_t); 234 if (nmp->b_rptr == nmp->b_wptr) { 235 tail->b_cont = nmp->b_cont; 236 freeb(nmp); 237 } else { 238 tail->b_cont = nmp; 239 } 240 while (tail->b_cont) { 241 tail = tail->b_cont; 242 } 243 } while ((nmp = mp) != NULL); 244 245 sctp_sendfail(sctp, meta, flags, error); 246 } 247 248 /* 249 * Send failure when the message hasn't been fully chunkified. 250 */ 251 void 252 sctp_sendfail_event(sctp_t *sctp, mblk_t *meta, int error, boolean_t chunkified) 253 { 254 mblk_t *mp; 255 mblk_t *nmp; 256 mblk_t *tail; 257 258 if (meta == NULL) 259 return; 260 261 if (!sctp->sctp_recvsendfailevnt) { 262 sctp_free_msg(meta); 263 return; 264 } 265 266 /* If the message is fully chunkified */ 267 if (chunkified) { 268 sctp_sendfail_sent(sctp, meta, error); 269 return; 270 } 271 /* 272 * Message might be partially chunkified, we need to remove 273 * all data_hdr's. 274 */ 275 mp = meta->b_cont; 276 tail = meta; 277 while ((nmp = mp->b_next) != NULL) { 278 mp->b_next = nmp->b_next; 279 nmp->b_next = NULL; 280 nmp->b_rptr += sizeof (sctp_data_hdr_t); 281 if (nmp->b_rptr == nmp->b_wptr) { 282 tail->b_cont = nmp->b_cont; 283 freeb(nmp); 284 } else { 285 tail->b_cont = nmp; 286 } 287 while (tail->b_cont) { 288 tail = tail->b_cont; 289 } 290 } 291 tail->b_cont = mp; 292 293 sctp_sendfail(sctp, meta, SCTP_DATA_UNSENT, error); 294 } 295 296 void 297 sctp_regift_xmitlist(sctp_t *sctp) 298 { 299 mblk_t *mp; 300 301 if (!sctp->sctp_recvsendfailevnt) { 302 return; 303 } 304 305 while ((mp = sctp->sctp_xmit_head) != NULL) { 306 sctp->sctp_xmit_head = mp->b_next; 307 mp->b_next = NULL; 308 if (sctp->sctp_xmit_head != NULL) 309 sctp->sctp_xmit_head->b_prev = NULL; 310 sctp_sendfail_event(sctp, mp, 0, B_TRUE); 311 } 312 while ((mp = sctp->sctp_xmit_unsent) != NULL) { 313 sctp->sctp_xmit_unsent = mp->b_next; 314 mp->b_next = NULL; 315 sctp_sendfail_event(sctp, mp, 0, B_FALSE); 316 } 317 sctp->sctp_xmit_tail = sctp->sctp_xmit_unsent_tail = NULL; 318 sctp->sctp_unacked = sctp->sctp_unsent = 0; 319 } 320 321 void 322 sctp_intf_event(sctp_t *sctp, in6_addr_t addr, int state, int error) 323 { 324 struct sctp_paddr_change *spc; 325 ipaddr_t addr4; 326 struct sockaddr_in *sin; 327 struct sockaddr_in6 *sin6; 328 mblk_t *mp; 329 330 if (!sctp->sctp_recvpathevnt) { 331 return; 332 } 333 334 if ((mp = allocb(sizeof (*spc), BPRI_MED)) == NULL) { 335 return; 336 } 337 338 spc = (struct sctp_paddr_change *)mp->b_rptr; 339 spc->spc_type = SCTP_PEER_ADDR_CHANGE; 340 spc->spc_flags = 0; 341 spc->spc_length = sizeof (*spc); 342 if (IN6_IS_ADDR_V4MAPPED(&addr)) { 343 IN6_V4MAPPED_TO_IPADDR(&addr, addr4); 344 sin = (struct sockaddr_in *)&spc->spc_aaddr; 345 sin->sin_family = AF_INET; 346 sin->sin_port = 0; 347 sin->sin_addr.s_addr = addr4; 348 } else { 349 sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr; 350 sin6->sin6_family = AF_INET6; 351 sin6->sin6_port = 0; 352 sin6->sin6_addr = addr; 353 } 354 spc->spc_state = state; 355 spc->spc_error = error; 356 spc->spc_assoc_id = 0; 357 358 mp->b_wptr = (uchar_t *)(spc + 1); 359 sctp_notify(sctp, mp, spc->spc_length); 360 } 361 362 void 363 sctp_error_event(sctp_t *sctp, sctp_chunk_hdr_t *ch) 364 { 365 struct sctp_remote_error *sre; 366 mblk_t *mp; 367 size_t len; 368 sctp_parm_hdr_t *errh; 369 uint16_t dlen = 0; 370 uint16_t error = 0; 371 void *dtail = NULL; 372 373 if (!sctp->sctp_recvpeererr) { 374 return; 375 } 376 377 if (ntohs(ch->sch_len) > sizeof (*ch)) { 378 errh = (sctp_parm_hdr_t *)(ch + 1); 379 error = ntohs(errh->sph_type); 380 dlen = ntohs(errh->sph_len) - sizeof (*errh); 381 if (dlen > 0) { 382 dtail = errh + 1; 383 } 384 } 385 386 len = sizeof (*sre) + dlen; 387 if ((mp = allocb(len, BPRI_MED)) == NULL) { 388 return; 389 } 390 391 sre = (struct sctp_remote_error *)mp->b_rptr; 392 sre->sre_type = SCTP_REMOTE_ERROR; 393 sre->sre_flags = 0; 394 sre->sre_length = len; 395 sre->sre_assoc_id = 0; 396 sre->sre_error = error; 397 if (dtail) { 398 bcopy(dtail, sre + 1, dlen); 399 } 400 401 mp->b_wptr = mp->b_rptr + len; 402 sctp_notify(sctp, mp, len); 403 } 404 405 void 406 sctp_shutdown_event(sctp_t *sctp) 407 { 408 struct sctp_shutdown_event *sse; 409 mblk_t *mp; 410 411 if (!sctp->sctp_recvshutdownevnt) { 412 return; 413 } 414 415 if ((mp = allocb(sizeof (*sse), BPRI_MED)) == NULL) { 416 return; 417 } 418 419 sse = (struct sctp_shutdown_event *)mp->b_rptr; 420 sse->sse_type = SCTP_SHUTDOWN_EVENT; 421 sse->sse_flags = 0; 422 sse->sse_length = sizeof (*sse); 423 sse->sse_assoc_id = 0; 424 425 mp->b_wptr = (uchar_t *)(sse + 1); 426 sctp_notify(sctp, mp, sse->sse_length); 427 } 428 429 void 430 sctp_adaptation_event(sctp_t *sctp) 431 { 432 struct sctp_adaptation_event *sai; 433 mblk_t *mp; 434 435 if (!sctp->sctp_recvalevnt || !sctp->sctp_recv_adaptation) { 436 return; 437 } 438 if ((mp = allocb(sizeof (*sai), BPRI_MED)) == NULL) { 439 return; 440 } 441 442 sai = (struct sctp_adaptation_event *)mp->b_rptr; 443 sai->sai_type = SCTP_ADAPTATION_INDICATION; 444 sai->sai_flags = 0; 445 sai->sai_length = sizeof (*sai); 446 sai->sai_assoc_id = 0; 447 /* 448 * Adaptation code delivered in network byte order. 449 */ 450 sai->sai_adaptation_ind = sctp->sctp_rx_adaptation_code; 451 452 mp->b_wptr = (uchar_t *)(sai + 1); 453 sctp_notify(sctp, mp, sai->sai_length); 454 455 sctp->sctp_recv_adaptation = 0; /* in case there's a restart later */ 456 } 457 458 /* Send partial deliver event */ 459 void 460 sctp_partial_delivery_event(sctp_t *sctp) 461 { 462 struct sctp_pdapi_event *pdapi; 463 mblk_t *mp; 464 465 if (!sctp->sctp_recvpdevnt) 466 return; 467 468 if ((mp = allocb(sizeof (*pdapi), BPRI_MED)) == NULL) 469 return; 470 471 pdapi = (struct sctp_pdapi_event *)mp->b_rptr; 472 pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT; 473 pdapi->pdapi_flags = 0; 474 pdapi->pdapi_length = sizeof (*pdapi); 475 pdapi->pdapi_indication = SCTP_PARTIAL_DELIVERY_ABORTED; 476 pdapi->pdapi_assoc_id = 0; 477 mp->b_wptr = (uchar_t *)(pdapi + 1); 478 sctp_notify(sctp, mp, pdapi->pdapi_length); 479 } 480