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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* Copyright (c) 1990 Mentat Inc. */ 27 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/types.h> 32 #include <sys/stream.h> 33 #include <sys/stropts.h> 34 #include <sys/strlog.h> 35 #include <sys/strsun.h> 36 #define _SUN_TPI_VERSION 2 37 #include <sys/tihdr.h> 38 #include <sys/timod.h> 39 #include <sys/ddi.h> 40 #include <sys/sunddi.h> 41 #include <sys/cmn_err.h> 42 #include <sys/debug.h> 43 #include <sys/kmem.h> 44 #include <sys/policy.h> 45 #include <sys/zone.h> 46 47 #include <sys/socket.h> 48 #include <sys/isa_defs.h> 49 #include <sys/suntpi.h> 50 #include <sys/xti_inet.h> 51 52 #include <net/route.h> 53 #include <net/if.h> 54 55 #include <netinet/in.h> 56 #include <netinet/ip6.h> 57 #include <netinet/icmp6.h> 58 #include <inet/common.h> 59 #include <inet/ip.h> 60 #include <inet/ip6.h> 61 #include <inet/ip_ire.h> 62 #include <inet/mi.h> 63 #include <inet/nd.h> 64 #include <inet/optcom.h> 65 #include <inet/snmpcom.h> 66 #include <inet/kstatcom.h> 67 #include <inet/rawip_impl.h> 68 69 #include <netinet/ip_mroute.h> 70 #include <inet/tcp.h> 71 #include <net/pfkeyv2.h> 72 #include <inet/ipsec_info.h> 73 #include <inet/ipclassifier.h> 74 75 #define ICMP6 "icmp6" 76 major_t ICMP6_MAJ; 77 78 /* 79 * Object to represent database of options to search passed to 80 * {sock,tpi}optcom_req() interface routine to take care of option 81 * management and associated methods. 82 * XXX These and other extern's should really move to a icmp header. 83 */ 84 extern optdb_obj_t icmp_opt_obj; 85 extern uint_t icmp_max_optsize; 86 87 /* 88 * Synchronization notes: 89 * 90 * At all points in this code where exclusive access is required, we 91 * pass a message to a subroutine by invoking qwriter(..., PERIM_OUTER) 92 * which will arrange to call the routine only after all threads have 93 * exited the shared resource. 94 */ 95 96 /* Named Dispatch Parameter Management Structure */ 97 typedef struct icmpparam_s { 98 uint_t icmp_param_min; 99 uint_t icmp_param_max; 100 uint_t icmp_param_value; 101 char *icmp_param_name; 102 } icmpparam_t; 103 104 static void icmp_addr_req(queue_t *q, mblk_t *mp); 105 static void icmp_bind(queue_t *q, mblk_t *mp); 106 static void icmp_bind_proto(queue_t *q); 107 static int icmp_build_hdrs(queue_t *q, icmp_t *icmp); 108 static void icmp_capability_req(queue_t *q, mblk_t *mp); 109 static int icmp_close(queue_t *q); 110 static void icmp_connect(queue_t *q, mblk_t *mp); 111 static void icmp_disconnect(queue_t *q, mblk_t *mp); 112 static void icmp_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, 113 int sys_error); 114 static void icmp_err_ack_prim(queue_t *q, mblk_t *mp, t_scalar_t primitive, 115 t_scalar_t t_error, int sys_error); 116 static void icmp_icmp_error(queue_t *q, mblk_t *mp); 117 static void icmp_icmp_error_ipv6(queue_t *q, mblk_t *mp); 118 static void icmp_info_req(queue_t *q, mblk_t *mp); 119 static mblk_t *icmp_ip_bind_mp(icmp_t *icmp, t_scalar_t bind_prim, 120 t_scalar_t addr_length, in_port_t); 121 static int icmp_open(queue_t *q, dev_t *devp, int flag, 122 int sflag, cred_t *credp); 123 static int icmp_unitdata_opt_process(queue_t *q, mblk_t *mp, 124 int *errorp, void *thisdg_attrs); 125 static boolean_t icmp_opt_allow_udr_set(t_scalar_t level, t_scalar_t name); 126 int icmp_opt_set(queue_t *q, uint_t optset_context, 127 int level, int name, uint_t inlen, 128 uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, 129 void *thisdg_attrs, cred_t *cr, mblk_t *mblk); 130 int icmp_opt_get(queue_t *q, int level, int name, 131 uchar_t *ptr); 132 static int icmp_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr); 133 static boolean_t icmp_param_register(icmpparam_t *icmppa, int cnt); 134 static int icmp_param_set(queue_t *q, mblk_t *mp, char *value, 135 caddr_t cp, cred_t *cr); 136 static int icmp_pkt_set(uchar_t *invalp, uint_t inlen, boolean_t sticky, 137 uchar_t **optbufp, uint_t *optlenp); 138 static void icmp_rput(queue_t *q, mblk_t *mp); 139 static void icmp_rput_bind_ack(queue_t *q, mblk_t *mp); 140 static int icmp_snmp_get(queue_t *q, mblk_t *mpctl); 141 static int icmp_snmp_set(queue_t *q, t_scalar_t level, t_scalar_t name, 142 uchar_t *ptr, int len); 143 static int icmp_status_report(queue_t *q, mblk_t *mp, caddr_t cp, 144 cred_t *cr); 145 static void icmp_ud_err(queue_t *q, mblk_t *mp, t_scalar_t err); 146 static void icmp_unbind(queue_t *q, mblk_t *mp); 147 static void icmp_wput(queue_t *q, mblk_t *mp); 148 static void icmp_wput_ipv6(queue_t *q, mblk_t *mp, sin6_t *sin6, 149 t_scalar_t tudr_optlen); 150 static void icmp_wput_other(queue_t *q, mblk_t *mp); 151 static void icmp_wput_iocdata(queue_t *q, mblk_t *mp); 152 static void icmp_wput_restricted(queue_t *q, mblk_t *mp); 153 154 static void rawip_kstat_init(void); 155 static void rawip_kstat_fini(void); 156 static int rawip_kstat_update(kstat_t *kp, int rw); 157 158 159 static struct module_info info = { 160 5707, "icmp", 1, INFPSZ, 512, 128 161 }; 162 163 static struct qinit rinit = { 164 (pfi_t)icmp_rput, NULL, icmp_open, icmp_close, NULL, &info 165 }; 166 167 static struct qinit winit = { 168 (pfi_t)icmp_wput, NULL, NULL, NULL, NULL, &info 169 }; 170 171 struct streamtab icmpinfo = { 172 &rinit, &winit 173 }; 174 175 static sin_t sin_null; /* Zero address for quick clears */ 176 static sin6_t sin6_null; /* Zero address for quick clears */ 177 static void *icmp_g_head; /* Head for list of open icmp streams. */ 178 static IDP icmp_g_nd; /* Points to table of ICMP ND variables. */ 179 180 /* MIB-2 stuff for SNMP */ 181 static mib2_rawip_t rawip_mib; /* SNMP fixed size info */ 182 static kstat_t *rawip_mibkp; /* kstat exporting rawip_mib data */ 183 184 /* Default structure copied into T_INFO_ACK messages */ 185 static struct T_info_ack icmp_g_t_info_ack = { 186 T_INFO_ACK, 187 IP_MAXPACKET, /* TSDU_size. icmp allows maximum size messages. */ 188 T_INVALID, /* ETSDU_size. icmp does not support expedited data. */ 189 T_INVALID, /* CDATA_size. icmp does not support connect data. */ 190 T_INVALID, /* DDATA_size. icmp does not support disconnect data. */ 191 0, /* ADDR_size - filled in later. */ 192 0, /* OPT_size - not initialized here */ 193 IP_MAXPACKET, /* TIDU_size. icmp allows maximum size messages. */ 194 T_CLTS, /* SERV_type. icmp supports connection-less. */ 195 TS_UNBND, /* CURRENT_state. This is set from icmp_state. */ 196 (XPG4_1|SENDZERO) /* PROVIDER_flag */ 197 }; 198 199 /* 200 * Table of ND variables supported by icmp. These are loaded into icmp_g_nd 201 * in icmp_open. 202 * All of these are alterable, within the min/max values given, at run time. 203 */ 204 static icmpparam_t icmp_param_arr[] = { 205 /* min max value name */ 206 { 0, 128, 32, "icmp_wroff_extra" }, 207 { 1, 255, 255, "icmp_ipv4_ttl" }, 208 { 0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS, "icmp_ipv6_hoplimit"}, 209 { 0, 1, 1, "icmp_bsd_compat" }, 210 { 4096, 65536, 8192, "icmp_xmit_hiwat"}, 211 { 0, 65536, 1024, "icmp_xmit_lowat"}, 212 { 4096, 65536, 8192, "icmp_recv_hiwat"}, 213 { 65536, 1024*1024*1024, 256*1024, "icmp_max_buf"}, 214 }; 215 #define icmp_wroff_extra icmp_param_arr[0].icmp_param_value 216 #define icmp_ipv4_ttl icmp_param_arr[1].icmp_param_value 217 #define icmp_ipv6_hoplimit icmp_param_arr[2].icmp_param_value 218 #define icmp_bsd_compat icmp_param_arr[3].icmp_param_value 219 #define icmp_xmit_hiwat icmp_param_arr[4].icmp_param_value 220 #define icmp_xmit_lowat icmp_param_arr[5].icmp_param_value 221 #define icmp_recv_hiwat icmp_param_arr[6].icmp_param_value 222 #define icmp_max_buf icmp_param_arr[7].icmp_param_value 223 224 /* 225 * This routine is called to handle each O_T_BIND_REQ/T_BIND_REQ message 226 * passed to icmp_wput. 227 * The O_T_BIND_REQ/T_BIND_REQ is passed downstream to ip with the ICMP 228 * protocol type placed in the message following the address. A T_BIND_ACK 229 * message is passed upstream when ip acknowledges the request. 230 * (Called as writer.) 231 */ 232 static void 233 icmp_bind(queue_t *q, mblk_t *mp) 234 { 235 sin_t *sin; 236 sin6_t *sin6; 237 mblk_t *mp1; 238 struct T_bind_req *tbr; 239 icmp_t *icmp; 240 241 icmp = (icmp_t *)q->q_ptr; 242 if ((mp->b_wptr - mp->b_rptr) < sizeof (*tbr)) { 243 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, 244 "icmp_bind: bad req, len %u", 245 (uint_t)(mp->b_wptr - mp->b_rptr)); 246 icmp_err_ack(q, mp, TPROTO, 0); 247 return; 248 } 249 if (icmp->icmp_state != TS_UNBND) { 250 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, 251 "icmp_bind: bad state, %d", icmp->icmp_state); 252 icmp_err_ack(q, mp, TOUTSTATE, 0); 253 return; 254 } 255 /* 256 * Reallocate the message to make sure we have enough room for an 257 * address and the protocol type. 258 */ 259 mp1 = reallocb(mp, sizeof (struct T_bind_ack) + sizeof (sin6_t) + 1, 1); 260 if (!mp1) { 261 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 262 return; 263 } 264 mp = mp1; 265 tbr = (struct T_bind_req *)mp->b_rptr; 266 switch (tbr->ADDR_length) { 267 case 0: /* Generic request */ 268 tbr->ADDR_offset = sizeof (struct T_bind_req); 269 if (icmp->icmp_family == AF_INET) { 270 tbr->ADDR_length = sizeof (sin_t); 271 sin = (sin_t *)&tbr[1]; 272 *sin = sin_null; 273 sin->sin_family = AF_INET; 274 mp->b_wptr = (uchar_t *)&sin[1]; 275 } else { 276 ASSERT(icmp->icmp_family == AF_INET6); 277 tbr->ADDR_length = sizeof (sin6_t); 278 sin6 = (sin6_t *)&tbr[1]; 279 *sin6 = sin6_null; 280 sin6->sin6_family = AF_INET6; 281 mp->b_wptr = (uchar_t *)&sin6[1]; 282 } 283 break; 284 case sizeof (sin_t): /* Complete IP address */ 285 sin = (sin_t *)mi_offset_param(mp, tbr->ADDR_offset, 286 sizeof (sin_t)); 287 if (sin == NULL || !OK_32PTR((char *)sin)) { 288 icmp_err_ack(q, mp, TSYSERR, EINVAL); 289 return; 290 } 291 if (icmp->icmp_family != AF_INET || 292 sin->sin_family != AF_INET) { 293 icmp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); 294 return; 295 } 296 break; 297 case sizeof (sin6_t): /* Complete IP address */ 298 sin6 = (sin6_t *)mi_offset_param(mp, tbr->ADDR_offset, 299 sizeof (sin6_t)); 300 if (sin6 == NULL || !OK_32PTR((char *)sin6)) { 301 icmp_err_ack(q, mp, TSYSERR, EINVAL); 302 return; 303 } 304 if (icmp->icmp_family != AF_INET6 || 305 sin6->sin6_family != AF_INET6) { 306 icmp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); 307 return; 308 } 309 /* No support for mapped addresses on raw sockets */ 310 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 311 icmp_err_ack(q, mp, TSYSERR, EADDRNOTAVAIL); 312 return; 313 } 314 break; 315 default: 316 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, 317 "icmp_bind: bad ADDR_length %d", tbr->ADDR_length); 318 icmp_err_ack(q, mp, TBADADDR, 0); 319 return; 320 } 321 /* 322 * Copy the source address into our icmp structure. This address 323 * may still be zero; if so, ip will fill in the correct address 324 * each time an outbound packet is passed to it. 325 * If we are binding to a broadcast or multicast address icmp_rput 326 * will clear the source address when it receives the T_BIND_ACK. 327 */ 328 icmp->icmp_state = TS_IDLE; 329 330 if (icmp->icmp_family == AF_INET) { 331 ASSERT(sin != NULL); 332 ASSERT(icmp->icmp_ipversion == IPV4_VERSION); 333 IN6_IPADDR_TO_V4MAPPED(sin->sin_addr.s_addr, 334 &icmp->icmp_v6src); 335 icmp->icmp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + 336 icmp->icmp_ip_snd_options_len; 337 icmp->icmp_bound_v6src = icmp->icmp_v6src; 338 } else { 339 int error; 340 341 ASSERT(sin6 != NULL); 342 ASSERT(icmp->icmp_ipversion == IPV6_VERSION); 343 icmp->icmp_v6src = sin6->sin6_addr; 344 icmp->icmp_max_hdr_len = icmp->icmp_sticky_hdrs_len; 345 icmp->icmp_bound_v6src = icmp->icmp_v6src; 346 347 /* Rebuild the header template */ 348 error = icmp_build_hdrs(q, icmp); 349 if (error != 0) { 350 icmp_err_ack(q, mp, TSYSERR, error); 351 return; 352 } 353 } 354 /* 355 * Place protocol type in the O_T_BIND_REQ/T_BIND_REQ following 356 * the address. 357 */ 358 *mp->b_wptr++ = icmp->icmp_proto; 359 if (!(V6_OR_V4_INADDR_ANY(icmp->icmp_v6src))) { 360 /* 361 * Append a request for an IRE if src not 0 (INADDR_ANY) 362 */ 363 mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); 364 if (!mp->b_cont) { 365 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 366 return; 367 } 368 mp->b_cont->b_wptr += sizeof (ire_t); 369 mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; 370 } 371 372 /* Pass the O_T_BIND_REQ/T_BIND_REQ to ip. */ 373 putnext(q, mp); 374 } 375 376 /* 377 * Send message to IP to just bind to the protocol. 378 */ 379 static void 380 icmp_bind_proto(queue_t *q) 381 { 382 mblk_t *mp; 383 struct T_bind_req *tbr; 384 icmp_t *icmp; 385 386 icmp = (icmp_t *)q->q_ptr; 387 mp = allocb(sizeof (struct T_bind_req) + sizeof (sin6_t) + 1, 388 BPRI_MED); 389 if (!mp) { 390 return; 391 } 392 mp->b_datap->db_type = M_PROTO; 393 tbr = (struct T_bind_req *)mp->b_rptr; 394 tbr->PRIM_type = O_T_BIND_REQ; /* change to T_BIND_REQ ? */ 395 tbr->ADDR_offset = sizeof (struct T_bind_req); 396 if (icmp->icmp_ipversion == IPV4_VERSION) { 397 sin_t *sin; 398 399 tbr->ADDR_length = sizeof (sin_t); 400 sin = (sin_t *)&tbr[1]; 401 *sin = sin_null; 402 sin->sin_family = AF_INET; 403 mp->b_wptr = (uchar_t *)&sin[1]; 404 } else { 405 sin6_t *sin6; 406 407 ASSERT(icmp->icmp_ipversion == IPV6_VERSION); 408 tbr->ADDR_length = sizeof (sin6_t); 409 sin6 = (sin6_t *)&tbr[1]; 410 *sin6 = sin6_null; 411 sin6->sin6_family = AF_INET6; 412 mp->b_wptr = (uchar_t *)&sin6[1]; 413 } 414 415 /* Place protocol type in the O_T_BIND_REQ following the address. */ 416 *mp->b_wptr++ = icmp->icmp_proto; 417 418 /* Pass the O_T_BIND_REQ to ip. */ 419 putnext(q, mp); 420 } 421 422 /* 423 * This routine handles each T_CONN_REQ message passed to icmp. It 424 * associates a default destination address with the stream. 425 * 426 * This routine sends down a T_BIND_REQ to IP with the following mblks: 427 * T_BIND_REQ - specifying local and remote address. 428 * IRE_DB_REQ_TYPE - to get an IRE back containing ire_type and src 429 * T_OK_ACK - for the T_CONN_REQ 430 * T_CONN_CON - to keep the TPI user happy 431 * 432 * The connect completes in icmp_rput. 433 * When a T_BIND_ACK is received information is extracted from the IRE 434 * and the two appended messages are sent to the TPI user. 435 * Should icmp_rput receive T_ERROR_ACK for the T_BIND_REQ it will convert 436 * it to an error ack for the appropriate primitive. 437 */ 438 static void 439 icmp_connect(queue_t *q, mblk_t *mp) 440 { 441 sin_t *sin; 442 sin6_t *sin6; 443 mblk_t *mp1, *mp2; 444 struct T_conn_req *tcr; 445 icmp_t *icmp; 446 ipaddr_t v4dst; 447 in6_addr_t v6dst; 448 uint32_t flowinfo; 449 450 icmp = (icmp_t *)q->q_ptr; 451 tcr = (struct T_conn_req *)mp->b_rptr; 452 /* Sanity checks */ 453 if ((mp->b_wptr - mp->b_rptr < sizeof (struct T_conn_req))) { 454 icmp_err_ack(q, mp, TPROTO, 0); 455 return; 456 } 457 458 if (icmp->icmp_state == TS_DATA_XFER) { 459 /* Already connected - clear out state */ 460 icmp->icmp_v6src = icmp->icmp_bound_v6src; 461 icmp->icmp_state = TS_IDLE; 462 } 463 464 465 if (tcr->OPT_length != 0) { 466 icmp_err_ack(q, mp, TBADOPT, 0); 467 return; 468 } 469 switch (tcr->DEST_length) { 470 default: 471 icmp_err_ack(q, mp, TBADADDR, 0); 472 return; 473 474 case sizeof (sin_t): 475 sin = (sin_t *)mi_offset_param(mp, tcr->DEST_offset, 476 sizeof (sin_t)); 477 if (sin == NULL || !OK_32PTR((char *)sin)) { 478 icmp_err_ack(q, mp, TSYSERR, EINVAL); 479 return; 480 } 481 if (icmp->icmp_family != AF_INET || 482 sin->sin_family != AF_INET) { 483 icmp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); 484 return; 485 } 486 v4dst = sin->sin_addr.s_addr; 487 IN6_IPADDR_TO_V4MAPPED(v4dst, &v6dst); 488 ASSERT(icmp->icmp_ipversion == IPV4_VERSION); 489 icmp->icmp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + 490 icmp->icmp_ip_snd_options_len; 491 break; 492 493 case sizeof (sin6_t): 494 sin6 = (sin6_t *)mi_offset_param(mp, tcr->DEST_offset, 495 sizeof (sin6_t)); 496 if (sin6 == NULL || !OK_32PTR((char *)sin6)) { 497 icmp_err_ack(q, mp, TSYSERR, EINVAL); 498 return; 499 } 500 if (icmp->icmp_family != AF_INET6 || 501 sin6->sin6_family != AF_INET6) { 502 icmp_err_ack(q, mp, TSYSERR, EAFNOSUPPORT); 503 return; 504 } 505 /* No support for mapped addresses on raw sockets */ 506 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 507 icmp_err_ack(q, mp, TSYSERR, EADDRNOTAVAIL); 508 return; 509 } 510 v6dst = sin6->sin6_addr; 511 ASSERT(icmp->icmp_ipversion == IPV6_VERSION); 512 icmp->icmp_max_hdr_len = icmp->icmp_sticky_hdrs_len; 513 flowinfo = sin6->sin6_flowinfo; 514 break; 515 } 516 if (icmp->icmp_ipversion == IPV4_VERSION) { 517 /* 518 * Interpret a zero destination to mean loopback. 519 * Update the T_CONN_REQ (sin/sin6) since it is used to 520 * generate the T_CONN_CON. 521 */ 522 if (v4dst == INADDR_ANY) { 523 v4dst = htonl(INADDR_LOOPBACK); 524 IN6_IPADDR_TO_V4MAPPED(v4dst, &v6dst); 525 if (icmp->icmp_family == AF_INET) { 526 sin->sin_addr.s_addr = v4dst; 527 } else { 528 sin6->sin6_addr = v6dst; 529 } 530 } 531 icmp->icmp_v6dst = v6dst; 532 icmp->icmp_flowinfo = 0; 533 534 /* 535 * If the destination address is multicast and 536 * an outgoing multicast interface has been set, 537 * use the address of that interface as our 538 * source address if no source address has been set. 539 */ 540 if (V4_PART_OF_V6(icmp->icmp_v6src) == INADDR_ANY && 541 CLASSD(v4dst) && 542 icmp->icmp_multicast_if_addr != INADDR_ANY) { 543 IN6_IPADDR_TO_V4MAPPED(icmp->icmp_multicast_if_addr, 544 &icmp->icmp_v6src); 545 } 546 } else { 547 ASSERT(icmp->icmp_ipversion == IPV6_VERSION); 548 /* 549 * Interpret a zero destination to mean loopback. 550 * Update the T_CONN_REQ (sin/sin6) since it is used to 551 * generate the T_CONN_CON. 552 */ 553 if (IN6_IS_ADDR_UNSPECIFIED(&v6dst)) { 554 v6dst = ipv6_loopback; 555 sin6->sin6_addr = v6dst; 556 } 557 icmp->icmp_v6dst = v6dst; 558 icmp->icmp_flowinfo = flowinfo; 559 /* 560 * If the destination address is multicast and 561 * an outgoing multicast interface has been set, 562 * then the ip bind logic will pick the correct source 563 * address (i.e. matching the outgoing multicast interface). 564 */ 565 } 566 567 /* 568 * Send down bind to IP to verify that there is a route 569 * and to determine the source address. 570 * This will come back as T_BIND_ACK with an IRE_DB_TYPE in rput. 571 */ 572 if (icmp->icmp_family == AF_INET) { 573 mp1 = icmp_ip_bind_mp(icmp, O_T_BIND_REQ, sizeof (ipa_conn_t), 574 sin->sin_port); 575 } else { 576 ASSERT(icmp->icmp_family == AF_INET6); 577 mp1 = icmp_ip_bind_mp(icmp, O_T_BIND_REQ, sizeof (ipa6_conn_t), 578 sin6->sin6_port); 579 } 580 if (mp1 == NULL) { 581 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 582 return; 583 } 584 585 /* 586 * We also have to send a connection confirmation to 587 * keep TLI happy. Prepare it for icmp_rput. 588 */ 589 if (icmp->icmp_family == AF_INET) { 590 mp2 = mi_tpi_conn_con(NULL, (char *)sin, sizeof (*sin), NULL, 591 0); 592 } else { 593 ASSERT(icmp->icmp_family == AF_INET6); 594 mp2 = mi_tpi_conn_con(NULL, (char *)sin6, sizeof (*sin6), NULL, 595 0); 596 } 597 if (mp2 == NULL) { 598 freemsg(mp1); 599 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 600 return; 601 } 602 603 mp = mi_tpi_ok_ack_alloc(mp); 604 if (mp == NULL) { 605 /* Unable to reuse the T_CONN_REQ for the ack. */ 606 freemsg(mp2); 607 icmp_err_ack_prim(q, mp1, T_CONN_REQ, TSYSERR, ENOMEM); 608 return; 609 } 610 611 icmp->icmp_state = TS_DATA_XFER; 612 613 /* Hang onto the T_OK_ACK and T_CONN_CON for later. */ 614 linkb(mp1, mp); 615 linkb(mp1, mp2); 616 617 putnext(q, mp1); 618 } 619 620 static int 621 icmp_close(queue_t *q) 622 { 623 icmp_t *icmp = (icmp_t *)q->q_ptr; 624 int i1; 625 626 qprocsoff(q); 627 628 /* If there are any options associated with the stream, free them. */ 629 if (icmp->icmp_ip_snd_options) 630 mi_free((char *)icmp->icmp_ip_snd_options); 631 632 if (icmp->icmp_filter != NULL) 633 kmem_free(icmp->icmp_filter, sizeof (icmp6_filter_t)); 634 635 /* Free memory associated with sticky options */ 636 if (icmp->icmp_sticky_hdrs_len != 0) { 637 kmem_free(icmp->icmp_sticky_hdrs, 638 icmp->icmp_sticky_hdrs_len); 639 icmp->icmp_sticky_hdrs = NULL; 640 icmp->icmp_sticky_hdrs_len = 0; 641 } 642 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_HOPOPTS) { 643 kmem_free(icmp->icmp_sticky_ipp.ipp_hopopts, 644 icmp->icmp_sticky_ipp.ipp_hopoptslen); 645 } 646 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_RTDSTOPTS) { 647 kmem_free(icmp->icmp_sticky_ipp.ipp_rtdstopts, 648 icmp->icmp_sticky_ipp.ipp_rtdstoptslen); 649 } 650 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_RTHDR) { 651 kmem_free(icmp->icmp_sticky_ipp.ipp_rthdr, 652 icmp->icmp_sticky_ipp.ipp_rthdrlen); 653 } 654 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_DSTOPTS) { 655 kmem_free(icmp->icmp_sticky_ipp.ipp_dstopts, 656 icmp->icmp_sticky_ipp.ipp_dstoptslen); 657 } 658 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_PATHMTU) { 659 kmem_free(icmp->icmp_sticky_ipp.ipp_pathmtu, 660 icmp->icmp_sticky_ipp.ipp_pathmtulen); 661 } 662 icmp->icmp_sticky_ipp.ipp_fields &= 663 ~(IPPF_HOPOPTS|IPPF_RTDSTOPTS|IPPF_RTHDR|IPPF_DSTOPTS); 664 665 crfree(icmp->icmp_credp); 666 667 /* Free the icmp structure and release the minor device number. */ 668 i1 = mi_close_comm(&icmp_g_head, q); 669 670 return (i1); 671 } 672 673 /* 674 * This routine handles each T_DISCON_REQ message passed to icmp 675 * as an indicating that ICMP is no longer connected. This results 676 * in sending a T_BIND_REQ to IP to restore the binding to just 677 * the local address. 678 * 679 * This routine sends down a T_BIND_REQ to IP with the following mblks: 680 * T_BIND_REQ - specifying just the local address. 681 * T_OK_ACK - for the T_DISCON_REQ 682 * 683 * The disconnect completes in icmp_rput. 684 * When a T_BIND_ACK is received the appended T_OK_ACK is sent to the TPI user. 685 * Should icmp_rput receive T_ERROR_ACK for the T_BIND_REQ it will convert 686 * it to an error ack for the appropriate primitive. 687 */ 688 static void 689 icmp_disconnect(queue_t *q, mblk_t *mp) 690 { 691 icmp_t *icmp; 692 mblk_t *mp1; 693 694 icmp = (icmp_t *)q->q_ptr; 695 696 if (icmp->icmp_state != TS_DATA_XFER) { 697 (void) mi_strlog(q, 1, SL_ERROR|SL_TRACE, 698 "icmp_disconnect: bad state, %d", icmp->icmp_state); 699 icmp_err_ack(q, mp, TOUTSTATE, 0); 700 return; 701 } 702 icmp->icmp_v6src = icmp->icmp_bound_v6src; 703 icmp->icmp_state = TS_IDLE; 704 705 /* 706 * Send down bind to IP to remove the full binding and revert 707 * to the local address binding. 708 */ 709 if (icmp->icmp_family == AF_INET) { 710 mp1 = icmp_ip_bind_mp(icmp, O_T_BIND_REQ, sizeof (sin_t), 0); 711 } else { 712 ASSERT(icmp->icmp_family == AF_INET6); 713 mp1 = icmp_ip_bind_mp(icmp, O_T_BIND_REQ, sizeof (sin6_t), 0); 714 } 715 if (mp1 == NULL) { 716 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 717 return; 718 } 719 mp = mi_tpi_ok_ack_alloc(mp); 720 if (mp == NULL) { 721 /* Unable to reuse the T_DISCON_REQ for the ack. */ 722 icmp_err_ack_prim(q, mp1, T_DISCON_REQ, TSYSERR, ENOMEM); 723 return; 724 } 725 726 if (icmp->icmp_family == AF_INET6) { 727 int error; 728 729 /* Rebuild the header template */ 730 error = icmp_build_hdrs(q, icmp); 731 if (error != 0) { 732 icmp_err_ack_prim(q, mp, T_DISCON_REQ, TSYSERR, error); 733 freemsg(mp1); 734 return; 735 } 736 } 737 icmp->icmp_discon_pending = 1; 738 739 /* Append the T_OK_ACK to the T_BIND_REQ for icmp_rput */ 740 linkb(mp1, mp); 741 putnext(q, mp1); 742 } 743 744 /* This routine creates a T_ERROR_ACK message and passes it upstream. */ 745 static void 746 icmp_err_ack(queue_t *q, mblk_t *mp, t_scalar_t t_error, int sys_error) 747 { 748 if ((mp = mi_tpi_err_ack_alloc(mp, t_error, sys_error)) != NULL) 749 qreply(q, mp); 750 } 751 752 /* Shorthand to generate and send TPI error acks to our client */ 753 static void 754 icmp_err_ack_prim(queue_t *q, mblk_t *mp, t_scalar_t primitive, 755 t_scalar_t t_error, int sys_error) 756 { 757 struct T_error_ack *teackp; 758 759 if ((mp = tpi_ack_alloc(mp, sizeof (struct T_error_ack), 760 M_PCPROTO, T_ERROR_ACK)) != NULL) { 761 teackp = (struct T_error_ack *)mp->b_rptr; 762 teackp->ERROR_prim = primitive; 763 teackp->TLI_error = t_error; 764 teackp->UNIX_error = sys_error; 765 qreply(q, mp); 766 } 767 } 768 769 /* 770 * icmp_icmp_error is called by icmp_rput to process ICMP 771 * messages passed up by IP. 772 * Generates the appropriate T_UDERROR_IND for permanent 773 * (non-transient) errors. 774 * Assumes that IP has pulled up everything up to and including 775 * the ICMP header. 776 */ 777 static void 778 icmp_icmp_error(queue_t *q, mblk_t *mp) 779 { 780 icmph_t *icmph; 781 ipha_t *ipha; 782 int iph_hdr_length; 783 sin_t sin; 784 sin6_t sin6; 785 mblk_t *mp1; 786 int error = 0; 787 icmp_t *icmp = (icmp_t *)q->q_ptr; 788 789 /* 790 * Deliver T_UDERROR_IND when the application has asked for it. 791 * The socket layer enables this automatically when connected. 792 */ 793 if (!icmp->icmp_dgram_errind) { 794 freemsg(mp); 795 return; 796 } 797 798 ipha = (ipha_t *)mp->b_rptr; 799 800 if (IPH_HDR_VERSION(ipha) != IPV4_VERSION) { 801 ASSERT(IPH_HDR_VERSION(ipha) == IPV6_VERSION); 802 icmp_icmp_error_ipv6(q, mp); 803 return; 804 } 805 ASSERT(IPH_HDR_VERSION(ipha) == IPV4_VERSION); 806 807 iph_hdr_length = IPH_HDR_LENGTH(ipha); 808 icmph = (icmph_t *)(&mp->b_rptr[iph_hdr_length]); 809 ipha = (ipha_t *)&icmph[1]; 810 iph_hdr_length = IPH_HDR_LENGTH(ipha); 811 812 switch (icmph->icmph_type) { 813 case ICMP_DEST_UNREACHABLE: 814 switch (icmph->icmph_code) { 815 case ICMP_FRAGMENTATION_NEEDED: 816 /* 817 * IP has already adjusted the path MTU. 818 * XXX Somehow pass MTU indication to application? 819 */ 820 break; 821 case ICMP_PORT_UNREACHABLE: 822 case ICMP_PROTOCOL_UNREACHABLE: 823 error = ECONNREFUSED; 824 break; 825 default: 826 /* Transient errors */ 827 break; 828 } 829 break; 830 default: 831 /* Transient errors */ 832 break; 833 } 834 if (error == 0) { 835 freemsg(mp); 836 return; 837 } 838 839 switch (icmp->icmp_family) { 840 case AF_INET: 841 sin = sin_null; 842 sin.sin_family = AF_INET; 843 sin.sin_addr.s_addr = ipha->ipha_dst; 844 mp1 = mi_tpi_uderror_ind((char *)&sin, sizeof (sin_t), NULL, 0, 845 error); 846 break; 847 case AF_INET6: 848 sin6 = sin6_null; 849 sin6.sin6_family = AF_INET6; 850 IN6_IPADDR_TO_V4MAPPED(ipha->ipha_dst, &sin6.sin6_addr); 851 852 mp1 = mi_tpi_uderror_ind((char *)&sin6, sizeof (sin6_t), 853 NULL, 0, error); 854 break; 855 } 856 if (mp1) 857 putnext(q, mp1); 858 freemsg(mp); 859 } 860 861 /* 862 * icmp_icmp_error_ipv6 is called by icmp_icmp_error to process ICMPv6 863 * for IPv6 packets. 864 * Send permanent (non-transient) errors upstream. 865 * Assumes that IP has pulled up all the extension headers as well 866 * as the ICMPv6 header. 867 */ 868 static void 869 icmp_icmp_error_ipv6(queue_t *q, mblk_t *mp) 870 { 871 icmp6_t *icmp6; 872 ip6_t *ip6h, *outer_ip6h; 873 uint16_t iph_hdr_length; 874 uint8_t *nexthdrp; 875 sin6_t sin6; 876 mblk_t *mp1; 877 int error = 0; 878 icmp_t *icmp = (icmp_t *)q->q_ptr; 879 880 outer_ip6h = (ip6_t *)mp->b_rptr; 881 if (outer_ip6h->ip6_nxt != IPPROTO_ICMPV6) 882 iph_hdr_length = ip_hdr_length_v6(mp, outer_ip6h); 883 else 884 iph_hdr_length = IPV6_HDR_LEN; 885 886 icmp6 = (icmp6_t *)&mp->b_rptr[iph_hdr_length]; 887 ip6h = (ip6_t *)&icmp6[1]; 888 if (!ip_hdr_length_nexthdr_v6(mp, ip6h, &iph_hdr_length, &nexthdrp)) { 889 freemsg(mp); 890 return; 891 } 892 if (*nexthdrp != icmp->icmp_proto) { 893 /* 894 * Could have switched icmp_proto after while ip did fanout of 895 * this message 896 */ 897 freemsg(mp); 898 return; 899 } 900 switch (icmp6->icmp6_type) { 901 case ICMP6_DST_UNREACH: 902 switch (icmp6->icmp6_code) { 903 case ICMP6_DST_UNREACH_NOPORT: 904 error = ECONNREFUSED; 905 break; 906 case ICMP6_DST_UNREACH_ADMIN: 907 case ICMP6_DST_UNREACH_NOROUTE: 908 case ICMP6_DST_UNREACH_BEYONDSCOPE: 909 case ICMP6_DST_UNREACH_ADDR: 910 /* Transient errors */ 911 break; 912 default: 913 break; 914 } 915 break; 916 case ICMP6_PACKET_TOO_BIG: { 917 struct T_unitdata_ind *tudi; 918 struct T_opthdr *toh; 919 size_t udi_size; 920 mblk_t *newmp; 921 t_scalar_t opt_length = sizeof (struct T_opthdr) + 922 sizeof (struct ip6_mtuinfo); 923 sin6_t *sin6; 924 struct ip6_mtuinfo *mtuinfo; 925 926 /* 927 * If the application has requested to receive path mtu 928 * information, send up an empty message containing an 929 * IPV6_PATHMTU ancillary data item. 930 */ 931 if (!icmp->icmp_ipv6_recvpathmtu) 932 break; 933 934 udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin6_t) + 935 opt_length; 936 if ((newmp = allocb(udi_size, BPRI_MED)) == NULL) { 937 BUMP_MIB(&rawip_mib, rawipInErrors); 938 break; 939 } 940 941 /* 942 * newmp->b_cont is left to NULL on purpose. This is an 943 * empty message containing only ancillary data. 944 */ 945 newmp->b_datap->db_type = M_PROTO; 946 tudi = (struct T_unitdata_ind *)newmp->b_rptr; 947 newmp->b_wptr = (uchar_t *)tudi + udi_size; 948 tudi->PRIM_type = T_UNITDATA_IND; 949 tudi->SRC_length = sizeof (sin6_t); 950 tudi->SRC_offset = sizeof (struct T_unitdata_ind); 951 tudi->OPT_offset = tudi->SRC_offset + sizeof (sin6_t); 952 tudi->OPT_length = opt_length; 953 954 sin6 = (sin6_t *)&tudi[1]; 955 bzero(sin6, sizeof (sin6_t)); 956 sin6->sin6_family = AF_INET6; 957 sin6->sin6_addr = icmp->icmp_v6dst; 958 959 toh = (struct T_opthdr *)&sin6[1]; 960 toh->level = IPPROTO_IPV6; 961 toh->name = IPV6_PATHMTU; 962 toh->len = opt_length; 963 toh->status = 0; 964 965 mtuinfo = (struct ip6_mtuinfo *)&toh[1]; 966 bzero(mtuinfo, sizeof (struct ip6_mtuinfo)); 967 mtuinfo->ip6m_addr.sin6_family = AF_INET6; 968 mtuinfo->ip6m_addr.sin6_addr = ip6h->ip6_dst; 969 mtuinfo->ip6m_mtu = icmp6->icmp6_mtu; 970 /* 971 * We've consumed everything we need from the original 972 * message. Free it, then send our empty message. 973 */ 974 freemsg(mp); 975 putnext(q, newmp); 976 return; 977 } 978 case ICMP6_TIME_EXCEEDED: 979 /* Transient errors */ 980 break; 981 case ICMP6_PARAM_PROB: 982 /* If this corresponds to an ICMP_PROTOCOL_UNREACHABLE */ 983 if (icmp6->icmp6_code == ICMP6_PARAMPROB_NEXTHEADER && 984 (uchar_t *)ip6h + icmp6->icmp6_pptr == 985 (uchar_t *)nexthdrp) { 986 error = ECONNREFUSED; 987 break; 988 } 989 break; 990 } 991 if (error == 0) { 992 freemsg(mp); 993 return; 994 } 995 996 sin6 = sin6_null; 997 sin6.sin6_family = AF_INET6; 998 sin6.sin6_addr = ip6h->ip6_dst; 999 sin6.sin6_flowinfo = ip6h->ip6_vcf & ~IPV6_VERS_AND_FLOW_MASK; 1000 1001 mp1 = mi_tpi_uderror_ind((char *)&sin6, sizeof (sin6_t), NULL, 0, 1002 error); 1003 if (mp1) 1004 putnext(q, mp1); 1005 freemsg(mp); 1006 } 1007 1008 /* 1009 * This routine responds to T_ADDR_REQ messages. It is called by icmp_wput. 1010 * The local address is filled in if endpoint is bound. The remote address 1011 * is filled in if remote address has been precified ("connected endpoint") 1012 * (The concept of connected CLTS sockets is alien to published TPI 1013 * but we support it anyway). 1014 */ 1015 static void 1016 icmp_addr_req(queue_t *q, mblk_t *mp) 1017 { 1018 icmp_t *icmp = (icmp_t *)q->q_ptr; 1019 mblk_t *ackmp; 1020 struct T_addr_ack *taa; 1021 1022 /* Make it large enough for worst case */ 1023 ackmp = reallocb(mp, sizeof (struct T_addr_ack) + 1024 2 * sizeof (sin6_t), 1); 1025 if (ackmp == NULL) { 1026 icmp_err_ack(q, mp, TSYSERR, ENOMEM); 1027 return; 1028 } 1029 taa = (struct T_addr_ack *)ackmp->b_rptr; 1030 1031 bzero(taa, sizeof (struct T_addr_ack)); 1032 ackmp->b_wptr = (uchar_t *)&taa[1]; 1033 1034 taa->PRIM_type = T_ADDR_ACK; 1035 ackmp->b_datap->db_type = M_PCPROTO; 1036 1037 /* 1038 * Note: Following code assumes 32 bit alignment of basic 1039 * data structures like sin_t and struct T_addr_ack. 1040 */ 1041 if (icmp->icmp_state != TS_UNBND) { 1042 /* 1043 * Fill in local address 1044 */ 1045 taa->LOCADDR_offset = sizeof (*taa); 1046 if (icmp->icmp_family == AF_INET) { 1047 sin_t *sin; 1048 1049 taa->LOCADDR_length = sizeof (sin_t); 1050 sin = (sin_t *)&taa[1]; 1051 /* Fill zeroes and then intialize non-zero fields */ 1052 *sin = sin_null; 1053 sin->sin_family = AF_INET; 1054 if (!IN6_IS_ADDR_V4MAPPED_ANY(&icmp->icmp_v6src) && 1055 !IN6_IS_ADDR_UNSPECIFIED(&icmp->icmp_v6src)) { 1056 IN6_V4MAPPED_TO_IPADDR(&icmp->icmp_v6src, 1057 sin->sin_addr.s_addr); 1058 } else { 1059 /* 1060 * INADDR_ANY 1061 * icmp_v6src is not set, we might be bound to 1062 * broadcast/multicast. Use icmp_bound_v6src as 1063 * local address instead (that could 1064 * also still be INADDR_ANY) 1065 */ 1066 IN6_V4MAPPED_TO_IPADDR(&icmp->icmp_bound_v6src, 1067 sin->sin_addr.s_addr); 1068 } 1069 ackmp->b_wptr = (uchar_t *)&sin[1]; 1070 } else { 1071 sin6_t *sin6; 1072 1073 ASSERT(icmp->icmp_family == AF_INET6); 1074 taa->LOCADDR_length = sizeof (sin6_t); 1075 sin6 = (sin6_t *)&taa[1]; 1076 /* Fill zeroes and then intialize non-zero fields */ 1077 *sin6 = sin6_null; 1078 sin6->sin6_family = AF_INET6; 1079 if (!IN6_IS_ADDR_UNSPECIFIED(&icmp->icmp_v6src)) { 1080 sin6->sin6_addr = icmp->icmp_v6src; 1081 } else { 1082 /* 1083 * UNSPECIFIED 1084 * icmp_v6src is not set, we might be bound to 1085 * broadcast/multicast. Use icmp_bound_v6src as 1086 * local address instead (that could 1087 * also still be UNSPECIFIED) 1088 */ 1089 sin6->sin6_addr = icmp->icmp_bound_v6src; 1090 } 1091 ackmp->b_wptr = (uchar_t *)&sin6[1]; 1092 } 1093 } 1094 ASSERT(ackmp->b_wptr <= ackmp->b_datap->db_lim); 1095 qreply(q, ackmp); 1096 } 1097 1098 static void 1099 icmp_copy_info(struct T_info_ack *tap, icmp_t *icmp) 1100 { 1101 *tap = icmp_g_t_info_ack; 1102 1103 if (icmp->icmp_family == AF_INET6) 1104 tap->ADDR_size = sizeof (sin6_t); 1105 else 1106 tap->ADDR_size = sizeof (sin_t); 1107 tap->CURRENT_state = icmp->icmp_state; 1108 tap->OPT_size = icmp_max_optsize; 1109 } 1110 1111 /* 1112 * This routine responds to T_CAPABILITY_REQ messages. It is called by 1113 * icmp_wput. Much of the T_CAPABILITY_ACK information is copied from 1114 * icmp_g_t_info_ack. The current state of the stream is copied from 1115 * icmp_state. 1116 */ 1117 static void 1118 icmp_capability_req(queue_t *q, mblk_t *mp) 1119 { 1120 icmp_t *icmp = (icmp_t *)q->q_ptr; 1121 t_uscalar_t cap_bits1; 1122 struct T_capability_ack *tcap; 1123 1124 cap_bits1 = ((struct T_capability_req *)mp->b_rptr)->CAP_bits1; 1125 1126 mp = tpi_ack_alloc(mp, sizeof (struct T_capability_ack), 1127 mp->b_datap->db_type, T_CAPABILITY_ACK); 1128 if (!mp) 1129 return; 1130 1131 tcap = (struct T_capability_ack *)mp->b_rptr; 1132 tcap->CAP_bits1 = 0; 1133 1134 if (cap_bits1 & TC1_INFO) { 1135 icmp_copy_info(&tcap->INFO_ack, icmp); 1136 tcap->CAP_bits1 |= TC1_INFO; 1137 } 1138 1139 qreply(q, mp); 1140 } 1141 1142 /* 1143 * This routine responds to T_INFO_REQ messages. It is called by icmp_wput. 1144 * Most of the T_INFO_ACK information is copied from icmp_g_t_info_ack. 1145 * The current state of the stream is copied from icmp_state. 1146 */ 1147 static void 1148 icmp_info_req(queue_t *q, mblk_t *mp) 1149 { 1150 icmp_t *icmp = (icmp_t *)q->q_ptr; 1151 1152 mp = tpi_ack_alloc(mp, sizeof (struct T_info_ack), M_PCPROTO, 1153 T_INFO_ACK); 1154 if (!mp) 1155 return; 1156 icmp_copy_info((struct T_info_ack *)mp->b_rptr, icmp); 1157 qreply(q, mp); 1158 } 1159 1160 /* 1161 * IP recognizes seven kinds of bind requests: 1162 * 1163 * - A zero-length address binds only to the protocol number. 1164 * 1165 * - A 4-byte address is treated as a request to 1166 * validate that the address is a valid local IPv4 1167 * address, appropriate for an application to bind to. 1168 * IP does the verification, but does not make any note 1169 * of the address at this time. 1170 * 1171 * - A 16-byte address contains is treated as a request 1172 * to validate a local IPv6 address, as the 4-byte 1173 * address case above. 1174 * 1175 * - A 16-byte sockaddr_in to validate the local IPv4 address and also 1176 * use it for the inbound fanout of packets. 1177 * 1178 * - A 24-byte sockaddr_in6 to validate the local IPv6 address and also 1179 * use it for the inbound fanout of packets. 1180 * 1181 * - A 12-byte address (ipa_conn_t) containing complete IPv4 fanout 1182 * information consisting of local and remote addresses 1183 * and ports (unused for raw sockets). In this case, the addresses are both 1184 * validated as appropriate for this operation, and, if 1185 * so, the information is retained for use in the 1186 * inbound fanout. 1187 * 1188 * - A 36-byte address address (ipa6_conn_t) containing complete IPv6 1189 * fanout information, like the 12-byte case above. 1190 * 1191 * IP will also fill in the IRE request mblk with information 1192 * regarding our peer. In all cases, we notify IP of our protocol 1193 * type by appending a single protocol byte to the bind request. 1194 */ 1195 static mblk_t * 1196 icmp_ip_bind_mp(icmp_t *icmp, t_scalar_t bind_prim, t_scalar_t addr_length, 1197 in_port_t fport) 1198 { 1199 char *cp; 1200 mblk_t *mp; 1201 struct T_bind_req *tbr; 1202 ipa_conn_t *ac; 1203 ipa6_conn_t *ac6; 1204 sin_t *sin; 1205 sin6_t *sin6; 1206 1207 ASSERT(bind_prim == O_T_BIND_REQ || bind_prim == T_BIND_REQ); 1208 1209 mp = allocb(sizeof (*tbr) + addr_length + 1, BPRI_HI); 1210 if (mp == NULL) 1211 return (NULL); 1212 mp->b_datap->db_type = M_PROTO; 1213 tbr = (struct T_bind_req *)mp->b_rptr; 1214 tbr->PRIM_type = bind_prim; 1215 tbr->ADDR_offset = sizeof (*tbr); 1216 tbr->CONIND_number = 0; 1217 tbr->ADDR_length = addr_length; 1218 cp = (char *)&tbr[1]; 1219 switch (addr_length) { 1220 case sizeof (ipa_conn_t): 1221 ASSERT(icmp->icmp_family == AF_INET); 1222 /* Append a request for an IRE */ 1223 mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); 1224 if (mp->b_cont == NULL) { 1225 freemsg(mp); 1226 return (NULL); 1227 } 1228 mp->b_cont->b_wptr += sizeof (ire_t); 1229 mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; 1230 1231 /* cp known to be 32 bit aligned */ 1232 ac = (ipa_conn_t *)cp; 1233 ac->ac_laddr = V4_PART_OF_V6(icmp->icmp_v6src); 1234 ac->ac_faddr = V4_PART_OF_V6(icmp->icmp_v6dst); 1235 ac->ac_fport = fport; 1236 ac->ac_lport = 0; 1237 break; 1238 1239 case sizeof (ipa6_conn_t): 1240 ASSERT(icmp->icmp_family == AF_INET6); 1241 /* Append a request for an IRE */ 1242 mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); 1243 if (mp->b_cont == NULL) { 1244 freemsg(mp); 1245 return (NULL); 1246 } 1247 mp->b_cont->b_wptr += sizeof (ire_t); 1248 mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; 1249 1250 /* cp known to be 32 bit aligned */ 1251 ac6 = (ipa6_conn_t *)cp; 1252 ac6->ac6_laddr = icmp->icmp_v6src; 1253 ac6->ac6_faddr = icmp->icmp_v6dst; 1254 ac6->ac6_fport = fport; 1255 ac6->ac6_lport = 0; 1256 break; 1257 1258 case sizeof (sin_t): 1259 ASSERT(icmp->icmp_family == AF_INET); 1260 /* Append a request for an IRE */ 1261 mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); 1262 if (!mp->b_cont) { 1263 freemsg(mp); 1264 return (NULL); 1265 } 1266 mp->b_cont->b_wptr += sizeof (ire_t); 1267 mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; 1268 1269 sin = (sin_t *)cp; 1270 *sin = sin_null; 1271 sin->sin_family = AF_INET; 1272 sin->sin_addr.s_addr = V4_PART_OF_V6(icmp->icmp_bound_v6src); 1273 break; 1274 1275 case sizeof (sin6_t): 1276 ASSERT(icmp->icmp_family == AF_INET6); 1277 /* Append a request for an IRE */ 1278 mp->b_cont = allocb(sizeof (ire_t), BPRI_HI); 1279 if (!mp->b_cont) { 1280 freemsg(mp); 1281 return (NULL); 1282 } 1283 mp->b_cont->b_wptr += sizeof (ire_t); 1284 mp->b_cont->b_datap->db_type = IRE_DB_REQ_TYPE; 1285 1286 sin6 = (sin6_t *)cp; 1287 *sin6 = sin6_null; 1288 sin6->sin6_family = AF_INET6; 1289 sin6->sin6_addr = icmp->icmp_bound_v6src; 1290 break; 1291 } 1292 /* Add protocol number to end */ 1293 cp[addr_length] = icmp->icmp_proto; 1294 mp->b_wptr = (uchar_t *)&cp[addr_length + 1]; 1295 return (mp); 1296 } 1297 1298 /* 1299 * This is the open routine for icmp. It allocates a icmp_t structure for 1300 * the stream and, on the first open of the module, creates an ND table. 1301 */ 1302 static int 1303 icmp_open(queue_t *q, dev_t *devp, int flag, int sflag, cred_t *credp) 1304 { 1305 int err; 1306 icmp_t *icmp; 1307 1308 /* If the stream is already open, return immediately. */ 1309 if (q->q_ptr != NULL) 1310 return (0); 1311 1312 /* If this is not a push of icmp as a module, fail. */ 1313 if (sflag != MODOPEN) 1314 return (EINVAL); 1315 1316 /* 1317 * Defer the qprocson until everything is initialized since 1318 * we are D_MTPERQ and after qprocson the rput routine can 1319 * run. (Could do qprocson earlier since icmp currently 1320 * has an outer perimeter.) 1321 */ 1322 1323 /* 1324 * Create a icmp_t structure for this stream and link into the 1325 * list of open streams. 1326 */ 1327 err = mi_open_comm(&icmp_g_head, sizeof (icmp_t), q, devp, 1328 flag, sflag, credp); 1329 if (err) 1330 return (err); 1331 1332 /* 1333 * The receive hiwat is only looked at on the stream head queue. 1334 * Store in q_hiwat in order to return on SO_RCVBUF getsockopts. 1335 */ 1336 q->q_hiwat = icmp_recv_hiwat; 1337 1338 /* Set the initial state of the stream and the privilege status. */ 1339 icmp = (icmp_t *)q->q_ptr; 1340 icmp->icmp_state = TS_UNBND; 1341 icmp->icmp_multicast_ttl = IP_DEFAULT_MULTICAST_TTL; 1342 icmp->icmp_multicast_loop = IP_DEFAULT_MULTICAST_LOOP; 1343 icmp->icmp_filter = NULL; 1344 1345 icmp->icmp_credp = credp; 1346 crhold(credp); 1347 1348 icmp->icmp_zoneid = getzoneid(); 1349 1350 if (getmajor(*devp) == (major_t)ICMP6_MAJ) { 1351 icmp->icmp_ipversion = IPV6_VERSION; 1352 icmp->icmp_family = AF_INET6; 1353 /* May be changed by a SO_PROTOTYPE socket option. */ 1354 icmp->icmp_proto = IPPROTO_ICMPV6; 1355 icmp->icmp_checksum_off = 2; /* Offset for icmp6_cksum */ 1356 icmp->icmp_max_hdr_len = IPV6_HDR_LEN; 1357 icmp->icmp_ttl = (uint8_t)icmp_ipv6_hoplimit; 1358 } else { 1359 icmp->icmp_ipversion = IPV4_VERSION; 1360 icmp->icmp_family = AF_INET; 1361 /* May be changed by a SO_PROTOTYPE socket option. */ 1362 icmp->icmp_proto = IPPROTO_ICMP; 1363 icmp->icmp_max_hdr_len = IP_SIMPLE_HDR_LENGTH; 1364 icmp->icmp_ttl = (uint8_t)icmp_ipv4_ttl; 1365 } 1366 qprocson(q); 1367 1368 /* 1369 * Check if icmp is being I_PUSHed by a non-privileged user. 1370 * If so, we set icmp_restricted to indicate that only MIB 1371 * traffic may pass. 1372 */ 1373 if (secpolicy_net_icmpaccess(credp) != 0) { 1374 icmp->icmp_restricted = 1; 1375 } 1376 1377 /* 1378 * The transmit hiwat is only looked at on IP's queue. 1379 * Store in q_hiwat in order to return on SO_SNDBUF 1380 * getsockopts. 1381 */ 1382 WR(q)->q_hiwat = icmp_xmit_hiwat; 1383 WR(q)->q_next->q_hiwat = WR(q)->q_hiwat; 1384 WR(q)->q_lowat = icmp_xmit_lowat; 1385 WR(q)->q_next->q_lowat = WR(q)->q_lowat; 1386 1387 if (icmp->icmp_family == AF_INET6) { 1388 /* Build initial header template for transmit */ 1389 int error; 1390 1391 error = icmp_build_hdrs(q, icmp); 1392 if (error != 0) { 1393 (void) icmp_close(q); 1394 return (error); 1395 } 1396 } 1397 /* Set the Stream head write offset. */ 1398 (void) mi_set_sth_wroff(q, icmp->icmp_max_hdr_len + icmp_wroff_extra); 1399 (void) mi_set_sth_hiwat(q, q->q_hiwat); 1400 1401 return (0); 1402 } 1403 1404 /* 1405 * Which ICMP options OK to set through T_UNITDATA_REQ... 1406 */ 1407 /* ARGSUSED */ 1408 static boolean_t 1409 icmp_opt_allow_udr_set(t_scalar_t level, t_scalar_t name) 1410 { 1411 return (B_TRUE); 1412 } 1413 1414 /* 1415 * This routine gets default values of certain options whose default 1416 * values are maintained by protcol specific code 1417 */ 1418 /* ARGSUSED */ 1419 int 1420 icmp_opt_default(queue_t *q, int level, int name, uchar_t *ptr) 1421 { 1422 int *i1 = (int *)ptr; 1423 1424 switch (level) { 1425 case IPPROTO_IP: 1426 switch (name) { 1427 case IP_MULTICAST_TTL: 1428 *ptr = (uchar_t)IP_DEFAULT_MULTICAST_TTL; 1429 return (sizeof (uchar_t)); 1430 case IP_MULTICAST_LOOP: 1431 *ptr = (uchar_t)IP_DEFAULT_MULTICAST_LOOP; 1432 return (sizeof (uchar_t)); 1433 } 1434 break; 1435 case IPPROTO_IPV6: 1436 switch (name) { 1437 case IPV6_MULTICAST_HOPS: 1438 *i1 = IP_DEFAULT_MULTICAST_TTL; 1439 return (sizeof (int)); 1440 case IPV6_MULTICAST_LOOP: 1441 *i1 = IP_DEFAULT_MULTICAST_LOOP; 1442 return (sizeof (int)); 1443 case IPV6_UNICAST_HOPS: 1444 *i1 = icmp_ipv6_hoplimit; 1445 return (sizeof (int)); 1446 } 1447 break; 1448 case IPPROTO_ICMPV6: 1449 switch (name) { 1450 case ICMP6_FILTER: 1451 /* Make it look like "pass all" */ 1452 ICMP6_FILTER_SETPASSALL((icmp6_filter_t *)ptr); 1453 return (sizeof (icmp6_filter_t)); 1454 } 1455 break; 1456 } 1457 return (-1); 1458 } 1459 1460 /* 1461 * This routine retrieves the current status of socket options. 1462 * It returns the size of the option retrieved. 1463 */ 1464 int 1465 icmp_opt_get(queue_t *q, int level, int name, uchar_t *ptr) 1466 { 1467 icmp_t *icmp = (icmp_t *)q->q_ptr; 1468 int *i1 = (int *)ptr; 1469 ip6_pkt_t *ipp = &icmp->icmp_sticky_ipp; 1470 1471 switch (level) { 1472 case SOL_SOCKET: 1473 switch (name) { 1474 case SO_DEBUG: 1475 *i1 = icmp->icmp_debug; 1476 break; 1477 case SO_TYPE: 1478 *i1 = SOCK_RAW; 1479 break; 1480 case SO_PROTOTYPE: 1481 *i1 = icmp->icmp_proto; 1482 break; 1483 case SO_REUSEADDR: 1484 *i1 = icmp->icmp_reuseaddr; 1485 break; 1486 1487 /* 1488 * The following three items are available here, 1489 * but are only meaningful to IP. 1490 */ 1491 case SO_DONTROUTE: 1492 *i1 = icmp->icmp_dontroute; 1493 break; 1494 case SO_USELOOPBACK: 1495 *i1 = icmp->icmp_useloopback; 1496 break; 1497 case SO_BROADCAST: 1498 *i1 = icmp->icmp_broadcast; 1499 break; 1500 1501 case SO_SNDBUF: 1502 ASSERT(q->q_hiwat <= INT_MAX); 1503 *i1 = (int)q->q_hiwat; 1504 break; 1505 case SO_RCVBUF: 1506 ASSERT(RD(q)->q_hiwat <= INT_MAX); 1507 *i1 = (int)RD(q)->q_hiwat; 1508 break; 1509 case SO_DGRAM_ERRIND: 1510 *i1 = icmp->icmp_dgram_errind; 1511 break; 1512 /* 1513 * Following three not meaningful for icmp 1514 * Action is same as "default" to which we fallthrough 1515 * so we keep them in comments. 1516 * case SO_LINGER: 1517 * case SO_KEEPALIVE: 1518 * case SO_OOBINLINE: 1519 */ 1520 default: 1521 return (-1); 1522 } 1523 break; 1524 case IPPROTO_IP: 1525 /* 1526 * Only allow IPv4 option processing on IPv4 sockets. 1527 */ 1528 if (icmp->icmp_family != AF_INET) 1529 return (-1); 1530 1531 switch (name) { 1532 case IP_OPTIONS: 1533 case T_IP_OPTIONS: 1534 /* Options are passed up with each packet */ 1535 return (0); 1536 case IP_HDRINCL: 1537 *i1 = (int)icmp->icmp_hdrincl; 1538 break; 1539 case IP_TOS: 1540 case T_IP_TOS: 1541 *i1 = (int)icmp->icmp_type_of_service; 1542 break; 1543 case IP_TTL: 1544 *i1 = (int)icmp->icmp_ttl; 1545 break; 1546 case IP_MULTICAST_IF: 1547 /* 0 address if not set */ 1548 *(ipaddr_t *)ptr = icmp->icmp_multicast_if_addr; 1549 return (sizeof (ipaddr_t)); 1550 case IP_MULTICAST_TTL: 1551 *(uchar_t *)ptr = icmp->icmp_multicast_ttl; 1552 return (sizeof (uchar_t)); 1553 case IP_MULTICAST_LOOP: 1554 *ptr = icmp->icmp_multicast_loop; 1555 return (sizeof (uint8_t)); 1556 case IP_BOUND_IF: 1557 /* Zero if not set */ 1558 *i1 = icmp->icmp_bound_if; 1559 break; /* goto sizeof (int) option return */ 1560 case IP_UNSPEC_SRC: 1561 *ptr = icmp->icmp_unspec_source; 1562 break; /* goto sizeof (int) option return */ 1563 case IP_XMIT_IF: 1564 *i1 = icmp->icmp_xmit_if; 1565 break; /* goto sizeof (int) option return */ 1566 case IP_RECVIF: 1567 *ptr = icmp->icmp_recvif; 1568 break; /* goto sizeof (int) option return */ 1569 /* 1570 * Cannot "get" the value of following options 1571 * at this level. Action is same as "default" to 1572 * which we fallthrough so we keep them in comments. 1573 * 1574 * case IP_ADD_MEMBERSHIP: 1575 * case IP_DROP_MEMBERSHIP: 1576 * case IP_BLOCK_SOURCE: 1577 * case IP_UNBLOCK_SOURCE: 1578 * case IP_ADD_SOURCE_MEMBERSHIP: 1579 * case IP_DROP_SOURCE_MEMBERSHIP: 1580 * case MCAST_JOIN_GROUP: 1581 * case MCAST_LEAVE_GROUP: 1582 * case MCAST_BLOCK_SOURCE: 1583 * case MCAST_UNBLOCK_SOURCE: 1584 * case MCAST_JOIN_SOURCE_GROUP: 1585 * case MCAST_LEAVE_SOURCE_GROUP: 1586 * case MRT_INIT: 1587 * case MRT_DONE: 1588 * case MRT_ADD_VIF: 1589 * case MRT_DEL_VIF: 1590 * case MRT_ADD_MFC: 1591 * case MRT_DEL_MFC: 1592 * case MRT_VERSION: 1593 * case MRT_ASSERT: 1594 * case IP_SEC_OPT: 1595 * case IP_DONTFAILOVER_IF: 1596 */ 1597 default: 1598 return (-1); 1599 } 1600 break; 1601 case IPPROTO_IPV6: 1602 /* 1603 * Only allow IPv6 option processing on native IPv6 sockets. 1604 */ 1605 if (icmp->icmp_family != AF_INET6) 1606 return (-1); 1607 switch (name) { 1608 case IPV6_UNICAST_HOPS: 1609 *i1 = (unsigned int)icmp->icmp_ttl; 1610 break; 1611 case IPV6_MULTICAST_IF: 1612 /* 0 index if not set */ 1613 *i1 = icmp->icmp_multicast_if_index; 1614 break; 1615 case IPV6_MULTICAST_HOPS: 1616 *i1 = icmp->icmp_multicast_ttl; 1617 break; 1618 case IPV6_MULTICAST_LOOP: 1619 *i1 = icmp->icmp_multicast_loop; 1620 break; 1621 case IPV6_BOUND_IF: 1622 /* Zero if not set */ 1623 *i1 = icmp->icmp_bound_if; 1624 break; 1625 case IPV6_UNSPEC_SRC: 1626 *i1 = icmp->icmp_unspec_source; 1627 break; 1628 case IPV6_CHECKSUM: 1629 /* 1630 * Return offset or -1 if no checksum offset. 1631 * Does not apply to IPPROTO_ICMPV6 1632 */ 1633 if (icmp->icmp_proto == IPPROTO_ICMPV6) 1634 return (-1); 1635 1636 if (icmp->icmp_raw_checksum) { 1637 *i1 = icmp->icmp_checksum_off; 1638 } else { 1639 *i1 = -1; 1640 } 1641 break; 1642 case IPV6_JOIN_GROUP: 1643 case IPV6_LEAVE_GROUP: 1644 case MCAST_JOIN_GROUP: 1645 case MCAST_LEAVE_GROUP: 1646 case MCAST_BLOCK_SOURCE: 1647 case MCAST_UNBLOCK_SOURCE: 1648 case MCAST_JOIN_SOURCE_GROUP: 1649 case MCAST_LEAVE_SOURCE_GROUP: 1650 /* cannot "get" the value for these */ 1651 return (-1); 1652 case IPV6_RECVPKTINFO: 1653 *i1 = icmp->icmp_ipv6_recvpktinfo; 1654 break; 1655 case IPV6_RECVTCLASS: 1656 *i1 = icmp->icmp_ipv6_recvtclass; 1657 break; 1658 case IPV6_RECVPATHMTU: 1659 *i1 = icmp->icmp_ipv6_recvpathmtu; 1660 break; 1661 case IPV6_V6ONLY: 1662 *i1 = 1; 1663 break; 1664 case IPV6_RECVHOPLIMIT: 1665 *i1 = icmp->icmp_ipv6_recvhoplimit; 1666 break; 1667 case IPV6_RECVHOPOPTS: 1668 *i1 = icmp->icmp_ipv6_recvhopopts; 1669 break; 1670 case IPV6_RECVDSTOPTS: 1671 *i1 = icmp->icmp_ipv6_recvdstopts; 1672 break; 1673 case _OLD_IPV6_RECVDSTOPTS: 1674 *i1 = icmp->icmp_old_ipv6_recvdstopts; 1675 break; 1676 case IPV6_RECVRTHDRDSTOPTS: 1677 *i1 = icmp->icmp_ipv6_recvrtdstopts; 1678 break; 1679 case IPV6_RECVRTHDR: 1680 *i1 = icmp->icmp_ipv6_recvrthdr; 1681 break; 1682 case IPV6_PKTINFO: { 1683 /* XXX assumes that caller has room for max size! */ 1684 struct in6_pktinfo *pkti; 1685 1686 pkti = (struct in6_pktinfo *)ptr; 1687 if (ipp->ipp_fields & IPPF_IFINDEX) 1688 pkti->ipi6_ifindex = ipp->ipp_ifindex; 1689 else 1690 pkti->ipi6_ifindex = 0; 1691 if (ipp->ipp_fields & IPPF_ADDR) 1692 pkti->ipi6_addr = ipp->ipp_addr; 1693 else 1694 pkti->ipi6_addr = ipv6_all_zeros; 1695 return (sizeof (struct in6_pktinfo)); 1696 } 1697 case IPV6_HOPLIMIT: 1698 if (ipp->ipp_fields & IPPF_HOPLIMIT) 1699 *i1 = ipp->ipp_hoplimit; 1700 else 1701 *i1 = -1; /* Not set */ 1702 break; 1703 case IPV6_NEXTHOP: { 1704 sin6_t *sin6 = (sin6_t *)ptr; 1705 1706 if (!(ipp->ipp_fields & IPPF_NEXTHOP)) 1707 return (0); 1708 *sin6 = sin6_null; 1709 sin6->sin6_family = AF_INET6; 1710 sin6->sin6_addr = ipp->ipp_nexthop; 1711 return (sizeof (sin6_t)); 1712 } 1713 case IPV6_HOPOPTS: 1714 if (!(ipp->ipp_fields & IPPF_HOPOPTS)) 1715 return (0); 1716 bcopy(ipp->ipp_hopopts, ptr, ipp->ipp_hopoptslen); 1717 return (ipp->ipp_hopoptslen); 1718 case IPV6_RTHDRDSTOPTS: 1719 if (!(ipp->ipp_fields & IPPF_RTDSTOPTS)) 1720 return (0); 1721 bcopy(ipp->ipp_rtdstopts, ptr, ipp->ipp_rtdstoptslen); 1722 return (ipp->ipp_rtdstoptslen); 1723 case IPV6_RTHDR: 1724 if (!(ipp->ipp_fields & IPPF_RTHDR)) 1725 return (0); 1726 bcopy(ipp->ipp_rthdr, ptr, ipp->ipp_rthdrlen); 1727 return (ipp->ipp_rthdrlen); 1728 case IPV6_DSTOPTS: 1729 if (!(ipp->ipp_fields & IPPF_DSTOPTS)) 1730 return (0); 1731 bcopy(ipp->ipp_dstopts, ptr, ipp->ipp_dstoptslen); 1732 return (ipp->ipp_dstoptslen); 1733 case IPV6_PATHMTU: 1734 if (!(ipp->ipp_fields & IPPF_PATHMTU)) 1735 return (0); 1736 1737 return (ip_fill_mtuinfo(&icmp->icmp_v6dst, 0, 1738 (struct ip6_mtuinfo *)ptr)); 1739 case IPV6_TCLASS: 1740 if (ipp->ipp_fields & IPPF_TCLASS) 1741 *i1 = ipp->ipp_tclass; 1742 else 1743 *i1 = IPV6_FLOW_TCLASS( 1744 IPV6_DEFAULT_VERS_AND_FLOW); 1745 break; 1746 default: 1747 return (-1); 1748 } 1749 break; 1750 case IPPROTO_ICMPV6: 1751 /* 1752 * Only allow IPv6 option processing on native IPv6 sockets. 1753 */ 1754 if (icmp->icmp_family != AF_INET6) 1755 return (-1); 1756 1757 if (icmp->icmp_proto != IPPROTO_ICMPV6) 1758 return (-1); 1759 1760 switch (name) { 1761 case ICMP6_FILTER: 1762 if (icmp->icmp_filter == NULL) { 1763 /* Make it look like "pass all" */ 1764 ICMP6_FILTER_SETPASSALL((icmp6_filter_t *)ptr); 1765 } else { 1766 (void) bcopy(icmp->icmp_filter, ptr, 1767 sizeof (icmp6_filter_t)); 1768 } 1769 return (sizeof (icmp6_filter_t)); 1770 default: 1771 return (-1); 1772 } 1773 default: 1774 return (-1); 1775 } 1776 return (sizeof (int)); 1777 } 1778 1779 /* This routine sets socket options. */ 1780 /* ARGSUSED */ 1781 int 1782 icmp_opt_set(queue_t *q, uint_t optset_context, int level, int name, 1783 uint_t inlen, uchar_t *invalp, uint_t *outlenp, uchar_t *outvalp, 1784 void *thisdg_attrs, cred_t *cr, mblk_t *mblk) 1785 { 1786 icmp_t *icmp = (icmp_t *)q->q_ptr; 1787 int *i1 = (int *)invalp; 1788 boolean_t onoff = (*i1 == 0) ? 0 : 1; 1789 boolean_t checkonly; 1790 int error; 1791 1792 switch (optset_context) { 1793 case SETFN_OPTCOM_CHECKONLY: 1794 checkonly = B_TRUE; 1795 /* 1796 * Note: Implies T_CHECK semantics for T_OPTCOM_REQ 1797 * inlen != 0 implies value supplied and 1798 * we have to "pretend" to set it. 1799 * inlen == 0 implies that there is no 1800 * value part in T_CHECK request and just validation 1801 * done elsewhere should be enough, we just return here. 1802 */ 1803 if (inlen == 0) { 1804 *outlenp = 0; 1805 return (0); 1806 } 1807 break; 1808 case SETFN_OPTCOM_NEGOTIATE: 1809 checkonly = B_FALSE; 1810 break; 1811 case SETFN_UD_NEGOTIATE: 1812 case SETFN_CONN_NEGOTIATE: 1813 checkonly = B_FALSE; 1814 /* 1815 * Negotiating local and "association-related" options 1816 * through T_UNITDATA_REQ. 1817 * 1818 * Following routine can filter out ones we do not 1819 * want to be "set" this way. 1820 */ 1821 if (!icmp_opt_allow_udr_set(level, name)) { 1822 *outlenp = 0; 1823 return (EINVAL); 1824 } 1825 break; 1826 default: 1827 /* 1828 * We should never get here 1829 */ 1830 *outlenp = 0; 1831 return (EINVAL); 1832 } 1833 1834 ASSERT((optset_context != SETFN_OPTCOM_CHECKONLY) || 1835 (optset_context == SETFN_OPTCOM_CHECKONLY && inlen != 0)); 1836 1837 /* 1838 * For fixed length options, no sanity check 1839 * of passed in length is done. It is assumed *_optcom_req() 1840 * routines do the right thing. 1841 */ 1842 1843 switch (level) { 1844 case SOL_SOCKET: 1845 switch (name) { 1846 case SO_DEBUG: 1847 if (!checkonly) 1848 icmp->icmp_debug = onoff; 1849 break; 1850 case SO_PROTOTYPE: 1851 if ((*i1 & 0xFF) != IPPROTO_ICMP && 1852 (*i1 & 0xFF) != IPPROTO_ICMPV6 && 1853 secpolicy_net_rawaccess(cr) != 0) { 1854 *outlenp = 0; 1855 return (EACCES); 1856 } 1857 /* Can't use IPPROTO_RAW with IPv6 */ 1858 if ((*i1 & 0xFF) == IPPROTO_RAW && 1859 icmp->icmp_family == AF_INET6) { 1860 *outlenp = 0; 1861 return (EPROTONOSUPPORT); 1862 } 1863 if (checkonly) { 1864 /* T_CHECK case */ 1865 *(int *)outvalp = (*i1 & 0xFF); 1866 break; 1867 } 1868 icmp->icmp_proto = *i1 & 0xFF; 1869 if ((icmp->icmp_proto == IPPROTO_RAW || 1870 icmp->icmp_proto == IPPROTO_IGMP) && 1871 icmp->icmp_family == AF_INET) 1872 icmp->icmp_hdrincl = 1; 1873 else 1874 icmp->icmp_hdrincl = 0; 1875 1876 if (icmp->icmp_family == AF_INET6 && 1877 icmp->icmp_proto == IPPROTO_ICMPV6) { 1878 /* Set offset for icmp6_cksum */ 1879 icmp->icmp_raw_checksum = 0; 1880 icmp->icmp_checksum_off = 2; 1881 } 1882 if (icmp->icmp_proto == IPPROTO_UDP || 1883 icmp->icmp_proto == IPPROTO_TCP || 1884 icmp->icmp_proto == IPPROTO_SCTP) { 1885 icmp->icmp_no_tp_cksum = 1; 1886 icmp->icmp_sticky_ipp.ipp_fields |= 1887 IPPF_NO_CKSUM; 1888 } else { 1889 icmp->icmp_no_tp_cksum = 0; 1890 icmp->icmp_sticky_ipp.ipp_fields &= 1891 ~IPPF_NO_CKSUM; 1892 } 1893 1894 if (icmp->icmp_filter != NULL && 1895 icmp->icmp_proto != IPPROTO_ICMPV6) { 1896 kmem_free(icmp->icmp_filter, 1897 sizeof (icmp6_filter_t)); 1898 icmp->icmp_filter = NULL; 1899 } 1900 1901 /* Rebuild the header template */ 1902 error = icmp_build_hdrs(q, icmp); 1903 if (error != 0) { 1904 *outlenp = 0; 1905 return (error); 1906 } 1907 1908 icmp_bind_proto(q); 1909 *outlenp = sizeof (int); 1910 *(int *)outvalp = *i1 & 0xFF; 1911 return (0); 1912 case SO_REUSEADDR: 1913 if (!checkonly) 1914 icmp->icmp_reuseaddr = onoff; 1915 break; 1916 1917 /* 1918 * The following three items are available here, 1919 * but are only meaningful to IP. 1920 */ 1921 case SO_DONTROUTE: 1922 if (!checkonly) 1923 icmp->icmp_dontroute = onoff; 1924 break; 1925 case SO_USELOOPBACK: 1926 if (!checkonly) 1927 icmp->icmp_useloopback = onoff; 1928 break; 1929 case SO_BROADCAST: 1930 if (!checkonly) 1931 icmp->icmp_broadcast = onoff; 1932 break; 1933 1934 case SO_SNDBUF: 1935 if (*i1 > icmp_max_buf) { 1936 *outlenp = 0; 1937 return (ENOBUFS); 1938 } 1939 if (!checkonly) { 1940 q->q_hiwat = *i1; 1941 q->q_next->q_hiwat = *i1; 1942 } 1943 break; 1944 case SO_RCVBUF: 1945 if (*i1 > icmp_max_buf) { 1946 *outlenp = 0; 1947 return (ENOBUFS); 1948 } 1949 if (!checkonly) { 1950 RD(q)->q_hiwat = *i1; 1951 (void) mi_set_sth_hiwat(RD(q), *i1); 1952 } 1953 break; 1954 case SO_DGRAM_ERRIND: 1955 if (!checkonly) 1956 icmp->icmp_dgram_errind = onoff; 1957 break; 1958 /* 1959 * Following three not meaningful for icmp 1960 * Action is same as "default" so we keep them 1961 * in comments. 1962 * case SO_LINGER: 1963 * case SO_KEEPALIVE: 1964 * case SO_OOBINLINE: 1965 */ 1966 default: 1967 *outlenp = 0; 1968 return (EINVAL); 1969 } 1970 break; 1971 case IPPROTO_IP: 1972 /* 1973 * Only allow IPv4 option processing on IPv4 sockets. 1974 */ 1975 if (icmp->icmp_family != AF_INET) { 1976 *outlenp = 0; 1977 return (ENOPROTOOPT); 1978 } 1979 switch (name) { 1980 case IP_OPTIONS: 1981 case T_IP_OPTIONS: 1982 /* Save options for use by IP. */ 1983 if (inlen & 0x3) { 1984 *outlenp = 0; 1985 return (EINVAL); 1986 } 1987 if (checkonly) 1988 break; 1989 1990 if (icmp->icmp_ip_snd_options) { 1991 mi_free((char *)icmp->icmp_ip_snd_options); 1992 icmp->icmp_ip_snd_options_len = 0; 1993 icmp->icmp_ip_snd_options = NULL; 1994 } 1995 if (inlen) { 1996 icmp->icmp_ip_snd_options = 1997 (uchar_t *)mi_alloc(inlen, BPRI_HI); 1998 if (icmp->icmp_ip_snd_options) { 1999 bcopy(invalp, 2000 icmp->icmp_ip_snd_options, inlen); 2001 icmp->icmp_ip_snd_options_len = inlen; 2002 } 2003 } 2004 icmp->icmp_max_hdr_len = IP_SIMPLE_HDR_LENGTH + 2005 icmp->icmp_ip_snd_options_len; 2006 (void) mi_set_sth_wroff(RD(q), icmp->icmp_max_hdr_len + 2007 icmp_wroff_extra); 2008 break; 2009 case IP_HDRINCL: 2010 if (!checkonly) 2011 icmp->icmp_hdrincl = onoff; 2012 break; 2013 case IP_TOS: 2014 case T_IP_TOS: 2015 if (!checkonly) { 2016 icmp->icmp_type_of_service = (uint8_t)*i1; 2017 } 2018 break; 2019 case IP_TTL: 2020 if (!checkonly) { 2021 icmp->icmp_ttl = (uint8_t)*i1; 2022 } 2023 break; 2024 case IP_MULTICAST_IF: 2025 /* 2026 * TODO should check OPTMGMT reply and undo this if 2027 * there is an error. 2028 */ 2029 if (!checkonly) 2030 icmp->icmp_multicast_if_addr = *i1; 2031 break; 2032 case IP_MULTICAST_TTL: 2033 if (!checkonly) 2034 icmp->icmp_multicast_ttl = *invalp; 2035 break; 2036 case IP_MULTICAST_LOOP: 2037 if (!checkonly) { 2038 icmp->icmp_multicast_loop = 2039 (*invalp == 0) ? 0 : 1; 2040 } 2041 break; 2042 case IP_BOUND_IF: 2043 if (!checkonly) 2044 icmp->icmp_bound_if = *i1; 2045 break; 2046 case IP_UNSPEC_SRC: 2047 if (!checkonly) 2048 icmp->icmp_unspec_source = onoff; 2049 break; 2050 case IP_XMIT_IF: 2051 if (!checkonly) 2052 icmp->icmp_xmit_if = *i1; 2053 break; 2054 case IP_RECVIF: 2055 if (!checkonly) 2056 icmp->icmp_recvif = onoff; 2057 break; 2058 case IP_ADD_MEMBERSHIP: 2059 case IP_DROP_MEMBERSHIP: 2060 case IP_BLOCK_SOURCE: 2061 case IP_UNBLOCK_SOURCE: 2062 case IP_ADD_SOURCE_MEMBERSHIP: 2063 case IP_DROP_SOURCE_MEMBERSHIP: 2064 case MCAST_JOIN_GROUP: 2065 case MCAST_LEAVE_GROUP: 2066 case MCAST_BLOCK_SOURCE: 2067 case MCAST_UNBLOCK_SOURCE: 2068 case MCAST_JOIN_SOURCE_GROUP: 2069 case MCAST_LEAVE_SOURCE_GROUP: 2070 case MRT_INIT: 2071 case MRT_DONE: 2072 case MRT_ADD_VIF: 2073 case MRT_DEL_VIF: 2074 case MRT_ADD_MFC: 2075 case MRT_DEL_MFC: 2076 case MRT_VERSION: 2077 case MRT_ASSERT: 2078 case IP_SEC_OPT: 2079 case IP_DONTFAILOVER_IF: 2080 /* 2081 * "soft" error (negative) 2082 * option not handled at this level 2083 * Note: Do not modify *outlenp 2084 */ 2085 return (-EINVAL); 2086 default: 2087 *outlenp = 0; 2088 return (EINVAL); 2089 } 2090 break; 2091 case IPPROTO_IPV6: { 2092 ip6_pkt_t *ipp; 2093 boolean_t sticky; 2094 2095 if (icmp->icmp_family != AF_INET6) { 2096 *outlenp = 0; 2097 return (ENOPROTOOPT); 2098 } 2099 /* 2100 * Deal with both sticky options and ancillary data 2101 */ 2102 if (thisdg_attrs == NULL) { 2103 /* sticky options, or none */ 2104 ipp = &icmp->icmp_sticky_ipp; 2105 sticky = B_TRUE; 2106 } else { 2107 /* ancillary data */ 2108 ipp = (ip6_pkt_t *)thisdg_attrs; 2109 sticky = B_FALSE; 2110 } 2111 2112 switch (name) { 2113 case IPV6_MULTICAST_IF: 2114 if (!checkonly) 2115 icmp->icmp_multicast_if_index = *i1; 2116 break; 2117 case IPV6_UNICAST_HOPS: 2118 /* -1 means use default */ 2119 if (*i1 < -1 || *i1 > IPV6_MAX_HOPS) { 2120 *outlenp = 0; 2121 return (EINVAL); 2122 } 2123 if (!checkonly) { 2124 if (*i1 == -1) { 2125 icmp->icmp_ttl = ipp->ipp_hoplimit = 2126 icmp_ipv6_hoplimit; 2127 ipp->ipp_fields &= ~IPPF_HOPLIMIT; 2128 /* Pass modified value to IP. */ 2129 *i1 = ipp->ipp_hoplimit; 2130 } else { 2131 icmp->icmp_ttl = ipp->ipp_hoplimit = 2132 (uint8_t)*i1; 2133 ipp->ipp_fields |= IPPF_HOPLIMIT; 2134 } 2135 /* Rebuild the header template */ 2136 error = icmp_build_hdrs(q, icmp); 2137 if (error != 0) { 2138 *outlenp = 0; 2139 return (error); 2140 } 2141 } 2142 break; 2143 case IPV6_MULTICAST_HOPS: 2144 /* -1 means use default */ 2145 if (*i1 < -1 || *i1 > IPV6_MAX_HOPS) { 2146 *outlenp = 0; 2147 return (EINVAL); 2148 } 2149 if (!checkonly) { 2150 if (*i1 == -1) { 2151 icmp->icmp_multicast_ttl = 2152 ipp->ipp_multi_hoplimit = 2153 IP_DEFAULT_MULTICAST_TTL; 2154 ipp->ipp_fields &= ~IPPF_MULTI_HOPLIMIT; 2155 /* Pass modified value to IP. */ 2156 *i1 = ipp->ipp_multi_hoplimit; 2157 } else { 2158 icmp->icmp_multicast_ttl = 2159 ipp->ipp_multi_hoplimit = 2160 (uint8_t)*i1; 2161 ipp->ipp_fields |= IPPF_MULTI_HOPLIMIT; 2162 } 2163 /* Rebuild the header template */ 2164 error = icmp_build_hdrs(q, icmp); 2165 if (error != 0) { 2166 *outlenp = 0; 2167 return (error); 2168 } 2169 } 2170 break; 2171 case IPV6_MULTICAST_LOOP: 2172 if (*i1 != 0 && *i1 != 1) { 2173 *outlenp = 0; 2174 return (EINVAL); 2175 } 2176 if (!checkonly) 2177 icmp->icmp_multicast_loop = *i1; 2178 break; 2179 case IPV6_CHECKSUM: 2180 /* 2181 * Integer offset into the user data of where the 2182 * checksum is located. 2183 * Offset of -1 disables option. 2184 * Does not apply to IPPROTO_ICMPV6. 2185 */ 2186 if (icmp->icmp_proto == IPPROTO_ICMPV6 || !sticky) { 2187 *outlenp = 0; 2188 return (EINVAL); 2189 } 2190 if ((*i1 != -1) && ((*i1 < 0) || (*i1 & 0x1) != 0)) { 2191 /* Negative or not 16 bit aligned offset */ 2192 *outlenp = 0; 2193 return (EINVAL); 2194 } 2195 if (checkonly) 2196 break; 2197 2198 if (*i1 == -1) { 2199 icmp->icmp_raw_checksum = 0; 2200 ipp->ipp_fields &= ~IPPF_RAW_CKSUM; 2201 } else { 2202 icmp->icmp_raw_checksum = 1; 2203 icmp->icmp_checksum_off = *i1; 2204 ipp->ipp_fields |= IPPF_RAW_CKSUM; 2205 } 2206 /* Rebuild the header template */ 2207 error = icmp_build_hdrs(q, icmp); 2208 if (error != 0) { 2209 *outlenp = 0; 2210 return (error); 2211 } 2212 break; 2213 case IPV6_JOIN_GROUP: 2214 case IPV6_LEAVE_GROUP: 2215 case MCAST_JOIN_GROUP: 2216 case MCAST_LEAVE_GROUP: 2217 case MCAST_BLOCK_SOURCE: 2218 case MCAST_UNBLOCK_SOURCE: 2219 case MCAST_JOIN_SOURCE_GROUP: 2220 case MCAST_LEAVE_SOURCE_GROUP: 2221 /* 2222 * "soft" error (negative) 2223 * option not handled at this level 2224 * Note: Do not modify *outlenp 2225 */ 2226 return (-EINVAL); 2227 case IPV6_BOUND_IF: 2228 if (!checkonly) 2229 icmp->icmp_bound_if = *i1; 2230 break; 2231 case IPV6_UNSPEC_SRC: 2232 if (!checkonly) 2233 icmp->icmp_unspec_source = onoff; 2234 break; 2235 case IPV6_RECVTCLASS: 2236 if (!checkonly) 2237 icmp->icmp_ipv6_recvtclass = onoff; 2238 break; 2239 /* 2240 * Set boolean switches for ancillary data delivery 2241 */ 2242 case IPV6_RECVPKTINFO: 2243 if (!checkonly) 2244 icmp->icmp_ipv6_recvpktinfo = onoff; 2245 break; 2246 case IPV6_RECVPATHMTU: 2247 if (!checkonly) 2248 icmp->icmp_ipv6_recvpathmtu = onoff; 2249 break; 2250 case IPV6_RECVHOPLIMIT: 2251 if (!checkonly) 2252 icmp->icmp_ipv6_recvhoplimit = onoff; 2253 break; 2254 case IPV6_RECVHOPOPTS: 2255 if (!checkonly) 2256 icmp->icmp_ipv6_recvhopopts = onoff; 2257 break; 2258 case IPV6_RECVDSTOPTS: 2259 if (!checkonly) 2260 icmp->icmp_ipv6_recvdstopts = onoff; 2261 break; 2262 case _OLD_IPV6_RECVDSTOPTS: 2263 if (!checkonly) 2264 icmp->icmp_old_ipv6_recvdstopts = onoff; 2265 break; 2266 case IPV6_RECVRTHDRDSTOPTS: 2267 if (!checkonly) 2268 icmp->icmp_ipv6_recvrtdstopts = onoff; 2269 break; 2270 case IPV6_RECVRTHDR: 2271 if (!checkonly) 2272 icmp->icmp_ipv6_recvrthdr = onoff; 2273 break; 2274 /* 2275 * Set sticky options or ancillary data. 2276 * If sticky options, (re)build any extension headers 2277 * that might be needed as a result. 2278 */ 2279 case IPV6_PKTINFO: 2280 /* 2281 * The source address and ifindex are verified 2282 * in ip_opt_set(). For ancillary data the 2283 * source address is checked in ip_wput_v6. 2284 */ 2285 if (inlen != 0 && inlen != sizeof (struct in6_pktinfo)) 2286 return (EINVAL); 2287 if (checkonly) 2288 break; 2289 2290 if (inlen == 0) { 2291 ipp->ipp_fields &= ~(IPPF_IFINDEX|IPPF_ADDR); 2292 ipp->ipp_sticky_ignored |= 2293 (IPPF_IFINDEX|IPPF_ADDR); 2294 } else { 2295 struct in6_pktinfo *pkti; 2296 2297 pkti = (struct in6_pktinfo *)invalp; 2298 ipp->ipp_ifindex = pkti->ipi6_ifindex; 2299 ipp->ipp_addr = pkti->ipi6_addr; 2300 if (ipp->ipp_ifindex != 0) 2301 ipp->ipp_fields |= IPPF_IFINDEX; 2302 else 2303 ipp->ipp_fields &= ~IPPF_IFINDEX; 2304 if (!IN6_IS_ADDR_UNSPECIFIED( 2305 &ipp->ipp_addr)) 2306 ipp->ipp_fields |= IPPF_ADDR; 2307 else 2308 ipp->ipp_fields &= ~IPPF_ADDR; 2309 } 2310 if (sticky) { 2311 error = icmp_build_hdrs(q, icmp); 2312 if (error != 0) 2313 return (error); 2314 } 2315 break; 2316 case IPV6_HOPLIMIT: 2317 if (inlen != 0 && inlen != sizeof (int)) 2318 return (EINVAL); 2319 if (checkonly) 2320 break; 2321 2322 if (inlen == 0) { 2323 ipp->ipp_fields &= ~IPPF_HOPLIMIT; 2324 ipp->ipp_sticky_ignored |= IPPF_HOPLIMIT; 2325 } else { 2326 if (*i1 > 255 || *i1 < -1) 2327 return (EINVAL); 2328 if (*i1 == -1) 2329 ipp->ipp_hoplimit = icmp_ipv6_hoplimit; 2330 else 2331 ipp->ipp_hoplimit = *i1; 2332 ipp->ipp_fields |= IPPF_HOPLIMIT; 2333 } 2334 if (sticky) { 2335 error = icmp_build_hdrs(q, icmp); 2336 if (error != 0) 2337 return (error); 2338 } 2339 break; 2340 case IPV6_TCLASS: 2341 /* 2342 * IPV6_RECVTCLASS accepts -1 as use kernel default 2343 * and [0, 255] as the actualy traffic class. 2344 */ 2345 if (inlen != 0 && inlen != sizeof (int)) 2346 return (EINVAL); 2347 if (checkonly) 2348 break; 2349 2350 if (inlen == 0) { 2351 ipp->ipp_fields &= ~IPPF_TCLASS; 2352 ipp->ipp_sticky_ignored |= IPPF_TCLASS; 2353 } else { 2354 if (*i1 >= 256 || *i1 < -1) 2355 return (EINVAL); 2356 if (*i1 == -1) { 2357 ipp->ipp_tclass = 2358 IPV6_FLOW_TCLASS( 2359 IPV6_DEFAULT_VERS_AND_FLOW); 2360 } else { 2361 ipp->ipp_tclass = *i1; 2362 } 2363 ipp->ipp_fields |= IPPF_TCLASS; 2364 } 2365 if (sticky) { 2366 error = icmp_build_hdrs(q, icmp); 2367 if (error != 0) 2368 return (error); 2369 } 2370 break; 2371 case IPV6_NEXTHOP: 2372 /* 2373 * IP will verify that the nexthop is reachable 2374 * and fail for sticky options. 2375 */ 2376 if (inlen != 0 && inlen != sizeof (sin6_t)) 2377 return (EINVAL); 2378 if (checkonly) 2379 break; 2380 2381 if (inlen == 0) { 2382 ipp->ipp_fields &= ~IPPF_NEXTHOP; 2383 ipp->ipp_sticky_ignored |= IPPF_NEXTHOP; 2384 } else { 2385 sin6_t *sin6 = (sin6_t *)invalp; 2386 2387 if (sin6->sin6_family != AF_INET6) 2388 return (EAFNOSUPPORT); 2389 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2390 return (EADDRNOTAVAIL); 2391 ipp->ipp_nexthop = sin6->sin6_addr; 2392 if (!IN6_IS_ADDR_UNSPECIFIED( 2393 &ipp->ipp_nexthop)) 2394 ipp->ipp_fields |= IPPF_NEXTHOP; 2395 else 2396 ipp->ipp_fields &= ~IPPF_NEXTHOP; 2397 } 2398 if (sticky) { 2399 error = icmp_build_hdrs(q, icmp); 2400 if (error != 0) 2401 return (error); 2402 } 2403 break; 2404 case IPV6_HOPOPTS: { 2405 ip6_hbh_t *hopts = (ip6_hbh_t *)invalp; 2406 /* 2407 * Sanity checks - minimum size, size a multiple of 2408 * eight bytes, and matching size passed in. 2409 */ 2410 if (inlen != 0 && 2411 inlen != (8 * (hopts->ip6h_len + 1))) 2412 return (EINVAL); 2413 2414 if (checkonly) 2415 break; 2416 if (inlen == 0) { 2417 if (sticky && 2418 (ipp->ipp_fields & IPPF_HOPOPTS) != 0) { 2419 kmem_free(ipp->ipp_hopopts, 2420 ipp->ipp_hopoptslen); 2421 ipp->ipp_hopopts = NULL; 2422 ipp->ipp_hopoptslen = 0; 2423 } 2424 ipp->ipp_fields &= ~IPPF_HOPOPTS; 2425 ipp->ipp_sticky_ignored |= IPPF_HOPOPTS; 2426 } else { 2427 error = icmp_pkt_set(invalp, inlen, sticky, 2428 (uchar_t **)&ipp->ipp_hopopts, 2429 &ipp->ipp_hopoptslen); 2430 if (error != 0) 2431 return (error); 2432 ipp->ipp_fields |= IPPF_HOPOPTS; 2433 } 2434 if (sticky) { 2435 error = icmp_build_hdrs(q, icmp); 2436 if (error != 0) 2437 return (error); 2438 } 2439 break; 2440 } 2441 case IPV6_RTHDRDSTOPTS: { 2442 ip6_dest_t *dopts = (ip6_dest_t *)invalp; 2443 2444 /* 2445 * Sanity checks - minimum size, size a multiple of 2446 * eight bytes, and matching size passed in. 2447 */ 2448 if (inlen != 0 && 2449 inlen != (8 * (dopts->ip6d_len + 1))) 2450 return (EINVAL); 2451 2452 if (checkonly) 2453 break; 2454 2455 if (inlen == 0) { 2456 if (sticky && 2457 (ipp->ipp_fields & IPPF_RTDSTOPTS) != 0) { 2458 kmem_free(ipp->ipp_rtdstopts, 2459 ipp->ipp_rtdstoptslen); 2460 ipp->ipp_rtdstopts = NULL; 2461 ipp->ipp_rtdstoptslen = 0; 2462 } 2463 ipp->ipp_fields &= ~IPPF_RTDSTOPTS; 2464 ipp->ipp_sticky_ignored |= IPPF_RTDSTOPTS; 2465 } else { 2466 error = icmp_pkt_set(invalp, inlen, sticky, 2467 (uchar_t **)&ipp->ipp_rtdstopts, 2468 &ipp->ipp_rtdstoptslen); 2469 if (error != 0) 2470 return (error); 2471 ipp->ipp_fields |= IPPF_RTDSTOPTS; 2472 } 2473 if (sticky) { 2474 error = icmp_build_hdrs(q, icmp); 2475 if (error != 0) 2476 return (error); 2477 } 2478 break; 2479 } 2480 case IPV6_DSTOPTS: { 2481 ip6_dest_t *dopts = (ip6_dest_t *)invalp; 2482 2483 /* 2484 * Sanity checks - minimum size, size a multiple of 2485 * eight bytes, and matching size passed in. 2486 */ 2487 if (inlen != 0 && 2488 inlen != (8 * (dopts->ip6d_len + 1))) 2489 return (EINVAL); 2490 2491 if (checkonly) 2492 break; 2493 2494 if (inlen == 0) { 2495 if (sticky && 2496 (ipp->ipp_fields & IPPF_DSTOPTS) != 0) { 2497 kmem_free(ipp->ipp_dstopts, 2498 ipp->ipp_dstoptslen); 2499 ipp->ipp_dstopts = NULL; 2500 ipp->ipp_dstoptslen = 0; 2501 } 2502 ipp->ipp_fields &= ~IPPF_DSTOPTS; 2503 ipp->ipp_sticky_ignored |= IPPF_DSTOPTS; 2504 } else { 2505 error = icmp_pkt_set(invalp, inlen, sticky, 2506 (uchar_t **)&ipp->ipp_dstopts, 2507 &ipp->ipp_dstoptslen); 2508 if (error != 0) 2509 return (error); 2510 ipp->ipp_fields |= IPPF_DSTOPTS; 2511 } 2512 if (sticky) { 2513 error = icmp_build_hdrs(q, icmp); 2514 if (error != 0) 2515 return (error); 2516 } 2517 break; 2518 } 2519 case IPV6_RTHDR: { 2520 ip6_rthdr_t *rt = (ip6_rthdr_t *)invalp; 2521 2522 /* 2523 * Sanity checks - minimum size, size a multiple of 2524 * eight bytes, and matching size passed in. 2525 */ 2526 if (inlen != 0 && 2527 inlen != (8 * (rt->ip6r_len + 1))) 2528 return (EINVAL); 2529 2530 if (checkonly) 2531 break; 2532 2533 if (inlen == 0) { 2534 if (sticky && 2535 (ipp->ipp_fields & IPPF_RTHDR) != 0) { 2536 kmem_free(ipp->ipp_rthdr, 2537 ipp->ipp_rthdrlen); 2538 ipp->ipp_rthdr = NULL; 2539 ipp->ipp_rthdrlen = 0; 2540 } 2541 ipp->ipp_fields &= ~IPPF_RTHDR; 2542 ipp->ipp_sticky_ignored |= IPPF_RTHDR; 2543 } else { 2544 error = icmp_pkt_set(invalp, inlen, sticky, 2545 (uchar_t **)&ipp->ipp_rthdr, 2546 &ipp->ipp_rthdrlen); 2547 if (error != 0) 2548 return (error); 2549 ipp->ipp_fields |= IPPF_RTHDR; 2550 } 2551 if (sticky) { 2552 error = icmp_build_hdrs(q, icmp); 2553 if (error != 0) 2554 return (error); 2555 } 2556 break; 2557 } 2558 2559 case IPV6_DONTFRAG: 2560 if (checkonly) 2561 break; 2562 2563 if (onoff) { 2564 ipp->ipp_fields |= IPPF_DONTFRAG; 2565 } else { 2566 ipp->ipp_fields &= ~IPPF_DONTFRAG; 2567 } 2568 break; 2569 2570 case IPV6_USE_MIN_MTU: 2571 if (inlen != sizeof (int)) 2572 return (EINVAL); 2573 2574 if (*i1 < -1 || *i1 > 1) 2575 return (EINVAL); 2576 2577 if (checkonly) 2578 break; 2579 2580 ipp->ipp_fields |= IPPF_USE_MIN_MTU; 2581 ipp->ipp_use_min_mtu = *i1; 2582 break; 2583 2584 /* 2585 * This option can't be set. Its only returned via 2586 * getsockopt() or ancillary data. 2587 */ 2588 case IPV6_PATHMTU: 2589 return (EINVAL); 2590 2591 case IPV6_BOUND_PIF: 2592 case IPV6_SEC_OPT: 2593 case IPV6_DONTFAILOVER_IF: 2594 case IPV6_SRC_PREFERENCES: 2595 case IPV6_V6ONLY: 2596 /* Handled at IP level */ 2597 return (-EINVAL); 2598 default: 2599 *outlenp = 0; 2600 return (EINVAL); 2601 } 2602 break; 2603 } /* end IPPROTO_IPV6 */ 2604 2605 case IPPROTO_ICMPV6: 2606 /* 2607 * Only allow IPv6 option processing on IPv6 sockets. 2608 */ 2609 if (icmp->icmp_family != AF_INET6) { 2610 *outlenp = 0; 2611 return (ENOPROTOOPT); 2612 } 2613 if (icmp->icmp_proto != IPPROTO_ICMPV6) { 2614 *outlenp = 0; 2615 return (ENOPROTOOPT); 2616 } 2617 switch (name) { 2618 case ICMP6_FILTER: 2619 if (!checkonly) { 2620 if ((inlen != 0) && 2621 (inlen != sizeof (icmp6_filter_t))) 2622 return (EINVAL); 2623 2624 if (inlen == 0) { 2625 if (icmp->icmp_filter != NULL) { 2626 kmem_free(icmp->icmp_filter, 2627 sizeof (icmp6_filter_t)); 2628 icmp->icmp_filter = NULL; 2629 } 2630 } else { 2631 if (icmp->icmp_filter == NULL) { 2632 icmp->icmp_filter = kmem_alloc( 2633 sizeof (icmp6_filter_t), 2634 KM_NOSLEEP); 2635 if (icmp->icmp_filter == NULL) { 2636 *outlenp = 0; 2637 return (ENOBUFS); 2638 } 2639 } 2640 (void) bcopy(invalp, icmp->icmp_filter, 2641 inlen); 2642 } 2643 } 2644 break; 2645 2646 default: 2647 *outlenp = 0; 2648 return (EINVAL); 2649 } 2650 break; 2651 default: 2652 *outlenp = 0; 2653 return (EINVAL); 2654 } 2655 /* 2656 * Common case of OK return with outval same as inval. 2657 */ 2658 if (invalp != outvalp) { 2659 /* don't trust bcopy for identical src/dst */ 2660 (void) bcopy(invalp, outvalp, inlen); 2661 } 2662 *outlenp = inlen; 2663 return (0); 2664 } 2665 2666 /* 2667 * Update icmp_sticky_hdrs based on icmp_sticky_ipp, icmp_v6src, icmp_ttl, 2668 * icmp_proto, icmp_raw_checksum and icmp_no_tp_cksum. 2669 * The headers include ip6i_t (if needed), ip6_t, and any sticky extension 2670 * headers. 2671 * Returns failure if can't allocate memory. 2672 */ 2673 static int 2674 icmp_build_hdrs(queue_t *q, icmp_t *icmp) 2675 { 2676 uchar_t *hdrs; 2677 uint_t hdrs_len; 2678 ip6_t *ip6h; 2679 ip6i_t *ip6i; 2680 ip6_pkt_t *ipp = &icmp->icmp_sticky_ipp; 2681 2682 hdrs_len = ip_total_hdrs_len_v6(ipp); 2683 ASSERT(hdrs_len != 0); 2684 if (hdrs_len != icmp->icmp_sticky_hdrs_len) { 2685 /* Need to reallocate */ 2686 if (hdrs_len != 0) { 2687 hdrs = kmem_alloc(hdrs_len, KM_NOSLEEP); 2688 if (hdrs == NULL) 2689 return (ENOMEM); 2690 } else { 2691 hdrs = NULL; 2692 } 2693 if (icmp->icmp_sticky_hdrs_len != 0) { 2694 kmem_free(icmp->icmp_sticky_hdrs, 2695 icmp->icmp_sticky_hdrs_len); 2696 } 2697 icmp->icmp_sticky_hdrs = hdrs; 2698 icmp->icmp_sticky_hdrs_len = hdrs_len; 2699 } 2700 ip_build_hdrs_v6(icmp->icmp_sticky_hdrs, 2701 icmp->icmp_sticky_hdrs_len, ipp, icmp->icmp_proto); 2702 2703 /* Set header fields not in ipp */ 2704 if (ipp->ipp_fields & IPPF_HAS_IP6I) { 2705 ip6i = (ip6i_t *)icmp->icmp_sticky_hdrs; 2706 ip6h = (ip6_t *)&ip6i[1]; 2707 2708 if (ipp->ipp_fields & IPPF_RAW_CKSUM) { 2709 ip6i->ip6i_flags |= IP6I_RAW_CHECKSUM; 2710 ip6i->ip6i_checksum_off = icmp->icmp_checksum_off; 2711 } 2712 if (ipp->ipp_fields & IPPF_NO_CKSUM) { 2713 ip6i->ip6i_flags |= IP6I_NO_ULP_CKSUM; 2714 } 2715 } else { 2716 ip6h = (ip6_t *)icmp->icmp_sticky_hdrs; 2717 } 2718 2719 if (!(ipp->ipp_fields & IPPF_ADDR)) 2720 ip6h->ip6_src = icmp->icmp_v6src; 2721 2722 /* 2723 * If IPV6_HOPLIMIT was set in ipp, use that value. 2724 * For sticky options, if it does not exist use 2725 * the value in the icmp structure. 2726 * All this as per RFC 2922. 2727 */ 2728 if (!(ipp->ipp_fields & IPPF_HOPLIMIT)) 2729 ip6h->ip6_hops = icmp->icmp_ttl; 2730 2731 /* Try to get everything in a single mblk */ 2732 if (hdrs_len > icmp->icmp_max_hdr_len) { 2733 icmp->icmp_max_hdr_len = hdrs_len; 2734 (void) mi_set_sth_wroff(RD(q), icmp->icmp_max_hdr_len + 2735 icmp_wroff_extra); 2736 } 2737 return (0); 2738 } 2739 2740 /* 2741 * Set optbuf and optlen for the option. 2742 * If sticky is set allocate memory (if not already present). 2743 * Otherwise just point optbuf and optlen at invalp and inlen. 2744 * Returns failure if memory can not be allocated. 2745 */ 2746 static int 2747 icmp_pkt_set(uchar_t *invalp, uint_t inlen, boolean_t sticky, 2748 uchar_t **optbufp, uint_t *optlenp) 2749 { 2750 uchar_t *optbuf; 2751 2752 if (!sticky) { 2753 *optbufp = invalp; 2754 *optlenp = inlen; 2755 return (0); 2756 } 2757 if (inlen == *optlenp) { 2758 /* Unchanged length - no need to realocate */ 2759 bcopy(invalp, *optbufp, inlen); 2760 return (0); 2761 } 2762 if (inlen != 0) { 2763 /* Allocate new buffer before free */ 2764 optbuf = kmem_alloc(inlen, KM_NOSLEEP); 2765 if (optbuf == NULL) 2766 return (ENOMEM); 2767 } else { 2768 optbuf = NULL; 2769 } 2770 /* Free old buffer */ 2771 if (*optlenp != 0) 2772 kmem_free(*optbufp, *optlenp); 2773 2774 bcopy(invalp, optbuf, inlen); 2775 *optbufp = optbuf; 2776 *optlenp = inlen; 2777 return (0); 2778 } 2779 2780 /* 2781 * This routine retrieves the value of an ND variable in a icmpparam_t 2782 * structure. It is called through nd_getset when a user reads the 2783 * variable. 2784 */ 2785 /* ARGSUSED */ 2786 static int 2787 icmp_param_get(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) 2788 { 2789 icmpparam_t *icmppa = (icmpparam_t *)cp; 2790 2791 (void) mi_mpprintf(mp, "%d", icmppa->icmp_param_value); 2792 return (0); 2793 } 2794 2795 /* 2796 * Walk through the param array specified registering each element with the 2797 * named dispatch (ND) handler. 2798 */ 2799 static boolean_t 2800 icmp_param_register(icmpparam_t *icmppa, int cnt) 2801 { 2802 for (; cnt-- > 0; icmppa++) { 2803 if (icmppa->icmp_param_name && icmppa->icmp_param_name[0]) { 2804 if (!nd_load(&icmp_g_nd, icmppa->icmp_param_name, 2805 icmp_param_get, icmp_param_set, 2806 (caddr_t)icmppa)) { 2807 nd_free(&icmp_g_nd); 2808 return (B_FALSE); 2809 } 2810 } 2811 } 2812 if (!nd_load(&icmp_g_nd, "icmp_status", icmp_status_report, NULL, 2813 NULL)) { 2814 nd_free(&icmp_g_nd); 2815 return (B_FALSE); 2816 } 2817 return (B_TRUE); 2818 } 2819 2820 /* This routine sets an ND variable in a icmpparam_t structure. */ 2821 /* ARGSUSED */ 2822 static int 2823 icmp_param_set(queue_t *q, mblk_t *mp, char *value, caddr_t cp, cred_t *cr) 2824 { 2825 long new_value; 2826 icmpparam_t *icmppa = (icmpparam_t *)cp; 2827 2828 /* 2829 * Fail the request if the new value does not lie within the 2830 * required bounds. 2831 */ 2832 if (ddi_strtol(value, NULL, 10, &new_value) != 0 || 2833 new_value < icmppa->icmp_param_min || 2834 new_value > icmppa->icmp_param_max) { 2835 return (EINVAL); 2836 } 2837 /* Set the new value */ 2838 icmppa->icmp_param_value = new_value; 2839 return (0); 2840 } 2841 2842 static void 2843 icmp_rput(queue_t *q, mblk_t *mp) 2844 { 2845 struct T_unitdata_ind *tudi; 2846 uchar_t *rptr; 2847 struct T_error_ack *tea; 2848 icmp_t *icmp; 2849 sin_t *sin; 2850 sin6_t *sin6; 2851 ip6_t *ip6h; 2852 ip6i_t *ip6i; 2853 mblk_t *mp1; 2854 int hdr_len; 2855 ipha_t *ipha; 2856 int udi_size; /* Size of T_unitdata_ind */ 2857 uint_t ipvers; 2858 ip6_pkt_t ipp; 2859 uint8_t nexthdr; 2860 boolean_t recvif = B_FALSE; 2861 in_pktinfo_t *pinfo; 2862 mblk_t *options_mp = NULL; 2863 uint_t icmp_opt = 0; 2864 boolean_t icmp_ipv6_recvhoplimit = B_FALSE; 2865 2866 icmp = (icmp_t *)q->q_ptr; 2867 if (icmp->icmp_restricted) { 2868 putnext(q, mp); 2869 return; 2870 } 2871 2872 if (mp->b_datap->db_type == M_CTL) { 2873 /* 2874 * IP sends up the IPSEC_IN message for handling IPSEC 2875 * policy at the TCP level. We don't need it here. 2876 */ 2877 if (*(uint32_t *)(mp->b_rptr) == IPSEC_IN) { 2878 mp1 = mp->b_cont; 2879 freeb(mp); 2880 mp = mp1; 2881 } else { 2882 pinfo = (in_pktinfo_t *)mp->b_rptr; 2883 if ((icmp->icmp_recvif != 0) && 2884 (pinfo->in_pkt_ulp_type == IN_PKTINFO)) { 2885 /* 2886 * IP has passed the options in mp and the 2887 * actual data is in b_cont. 2888 */ 2889 recvif = B_TRUE; 2890 /* 2891 * We are here bcos IP_RECVIF is set so we need 2892 * to extract the options mblk and adjust the 2893 * rptr 2894 */ 2895 options_mp = mp; 2896 mp = mp->b_cont; 2897 } 2898 } 2899 } 2900 2901 rptr = mp->b_rptr; 2902 switch (mp->b_datap->db_type) { 2903 case M_DATA: 2904 /* 2905 * M_DATA messages contain IP packets. They are handled 2906 * following the switch. 2907 */ 2908 break; 2909 case M_PROTO: 2910 case M_PCPROTO: 2911 /* M_PROTO messages contain some type of TPI message. */ 2912 if ((mp->b_wptr - rptr) < sizeof (t_scalar_t)) { 2913 freemsg(mp); 2914 return; 2915 } 2916 tea = (struct T_error_ack *)rptr; 2917 switch (tea->PRIM_type) { 2918 case T_ERROR_ACK: 2919 switch (tea->ERROR_prim) { 2920 case O_T_BIND_REQ: 2921 case T_BIND_REQ: 2922 /* 2923 * If our O_T_BIND_REQ/T_BIND_REQ fails, 2924 * clear out the source address before 2925 * passing the message upstream. 2926 * If this was caused by a T_CONN_REQ 2927 * revert back to bound state. 2928 */ 2929 if (icmp->icmp_state == TS_UNBND) { 2930 /* 2931 * TPI has not yet bound - bind sent by 2932 * icmp_bind_proto. 2933 */ 2934 freemsg(mp); 2935 return; 2936 } 2937 if (icmp->icmp_state == TS_DATA_XFER) { 2938 /* Connect failed */ 2939 tea->ERROR_prim = T_CONN_REQ; 2940 icmp->icmp_v6src = 2941 icmp->icmp_bound_v6src; 2942 icmp->icmp_state = TS_IDLE; 2943 if (icmp->icmp_family == AF_INET6) 2944 (void) icmp_build_hdrs(q, icmp); 2945 break; 2946 } 2947 2948 if (icmp->icmp_discon_pending) { 2949 tea->ERROR_prim = T_DISCON_REQ; 2950 icmp->icmp_discon_pending = 0; 2951 } 2952 V6_SET_ZERO(icmp->icmp_v6src); 2953 V6_SET_ZERO(icmp->icmp_bound_v6src); 2954 icmp->icmp_state = TS_UNBND; 2955 if (icmp->icmp_family == AF_INET6) 2956 (void) icmp_build_hdrs(q, icmp); 2957 break; 2958 default: 2959 break; 2960 } 2961 break; 2962 case T_BIND_ACK: 2963 icmp_rput_bind_ack(q, mp); 2964 return; 2965 2966 case T_OPTMGMT_ACK: 2967 case T_OK_ACK: 2968 if (tea->PRIM_type == T_OK_ACK) { 2969 struct T_ok_ack *toa; 2970 toa = (struct T_ok_ack *)rptr; 2971 if (toa->CORRECT_prim == T_UNBIND_REQ) { 2972 /* 2973 * If somebody sets IPSEC options, IP 2974 * sends some IPSEC info which is used 2975 * by the TCP for detached connections. 2976 * We don't need it here. 2977 */ 2978 if ((mp1 = mp->b_cont) != NULL) { 2979 freemsg(mp1); 2980 mp->b_cont = NULL; 2981 } 2982 } 2983 } 2984 break; 2985 default: 2986 freemsg(mp); 2987 return; 2988 } 2989 putnext(q, mp); 2990 return; 2991 case M_CTL: 2992 if (recvif) { 2993 /* 2994 * IP has passed the options in mp and the actual data 2995 * is in b_cont. Jump to normal data processing. 2996 */ 2997 break; 2998 } 2999 3000 /* Contains ICMP packet from IP */ 3001 icmp_icmp_error(q, mp); 3002 return; 3003 default: 3004 putnext(q, mp); 3005 return; 3006 } 3007 3008 /* 3009 * Discard message if it is misaligned or smaller than the IP header. 3010 */ 3011 if (!OK_32PTR(rptr) || (mp->b_wptr - rptr) < sizeof (ipha_t)) { 3012 freemsg(mp); 3013 if (options_mp != NULL) 3014 freeb(options_mp); 3015 BUMP_MIB(&rawip_mib, rawipInErrors); 3016 return; 3017 } 3018 ipvers = IPH_HDR_VERSION((ipha_t *)rptr); 3019 3020 /* Handle M_DATA messages containing IP packets messages */ 3021 if (ipvers == IPV4_VERSION) { 3022 /* 3023 * Special case where IP attaches 3024 * the IRE needs to be handled so that we don't send up 3025 * IRE to the user land. 3026 */ 3027 ipha = (ipha_t *)rptr; 3028 hdr_len = IPH_HDR_LENGTH(ipha); 3029 3030 if (ipha->ipha_protocol == IPPROTO_TCP) { 3031 tcph_t *tcph = (tcph_t *)&mp->b_rptr[hdr_len]; 3032 3033 if (((tcph->th_flags[0] & (TH_SYN|TH_ACK)) == 3034 TH_SYN) && mp->b_cont != NULL) { 3035 mp1 = mp->b_cont; 3036 if (mp1->b_datap->db_type == IRE_DB_TYPE) { 3037 freeb(mp1); 3038 mp->b_cont = NULL; 3039 } 3040 } 3041 } 3042 if (icmp_bsd_compat) { 3043 ushort_t len; 3044 len = ntohs(ipha->ipha_length); 3045 3046 if (mp->b_datap->db_ref > 1) { 3047 /* 3048 * Allocate a new IP header so that we can 3049 * modify ipha_length. 3050 */ 3051 mblk_t *mp1; 3052 3053 mp1 = allocb(hdr_len, BPRI_MED); 3054 if (!mp1) { 3055 freemsg(mp); 3056 if (options_mp != NULL) 3057 freeb(options_mp); 3058 BUMP_MIB(&rawip_mib, rawipInErrors); 3059 return; 3060 } 3061 bcopy(rptr, mp1->b_rptr, hdr_len); 3062 mp->b_rptr = rptr + hdr_len; 3063 rptr = mp1->b_rptr; 3064 ipha = (ipha_t *)rptr; 3065 mp1->b_cont = mp; 3066 mp1->b_wptr = rptr + hdr_len; 3067 mp = mp1; 3068 } 3069 len -= hdr_len; 3070 ipha->ipha_length = htons(len); 3071 } 3072 } 3073 3074 /* 3075 * This is the inbound data path. Packets are passed upstream as 3076 * T_UNITDATA_IND messages with full IP headers still attached. 3077 */ 3078 if (icmp->icmp_family == AF_INET) { 3079 ASSERT(ipvers == IPV4_VERSION); 3080 udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin_t); 3081 if (recvif) { 3082 udi_size += sizeof (struct T_opthdr) + 3083 sizeof (uint_t); 3084 } 3085 mp1 = allocb(udi_size, BPRI_MED); 3086 if (mp1 == NULL) { 3087 freemsg(mp); 3088 if (options_mp != NULL) 3089 freeb(options_mp); 3090 BUMP_MIB(&rawip_mib, rawipInErrors); 3091 return; 3092 } 3093 mp1->b_cont = mp; 3094 mp = mp1; 3095 tudi = (struct T_unitdata_ind *)mp->b_rptr; 3096 mp->b_datap->db_type = M_PROTO; 3097 mp->b_wptr = (uchar_t *)tudi + udi_size; 3098 tudi->PRIM_type = T_UNITDATA_IND; 3099 tudi->SRC_length = sizeof (sin_t); 3100 tudi->SRC_offset = sizeof (struct T_unitdata_ind); 3101 sin = (sin_t *)&tudi[1]; 3102 *sin = sin_null; 3103 sin->sin_family = AF_INET; 3104 sin->sin_addr.s_addr = ipha->ipha_src; 3105 tudi->OPT_offset = sizeof (struct T_unitdata_ind) + 3106 sizeof (sin_t); 3107 udi_size -= (sizeof (struct T_unitdata_ind) + sizeof (sin_t)); 3108 tudi->OPT_length = udi_size; 3109 3110 /* 3111 * Add options if IP_RECVIF is set 3112 */ 3113 if (udi_size != 0) { 3114 char *dstopt; 3115 3116 dstopt = (char *)&sin[1]; 3117 if (recvif) { 3118 3119 struct T_opthdr *toh; 3120 uint_t *dstptr; 3121 3122 toh = (struct T_opthdr *)dstopt; 3123 toh->level = IPPROTO_IP; 3124 toh->name = IP_RECVIF; 3125 toh->len = sizeof (struct T_opthdr) + 3126 sizeof (uint_t); 3127 toh->status = 0; 3128 dstopt += sizeof (struct T_opthdr); 3129 dstptr = (uint_t *)dstopt; 3130 *dstptr = pinfo->in_pkt_ifindex; 3131 dstopt += sizeof (uint_t); 3132 freeb(options_mp); 3133 udi_size -= toh->len; 3134 } 3135 3136 /* Consumed all of allocated space */ 3137 ASSERT(udi_size == 0); 3138 } 3139 3140 BUMP_MIB(&rawip_mib, rawipInDatagrams); 3141 putnext(q, mp); 3142 return; 3143 } 3144 3145 /* 3146 * We don't need options_mp in the IPv6 path. 3147 */ 3148 if (options_mp != NULL) { 3149 freeb(options_mp); 3150 options_mp = NULL; 3151 } 3152 3153 /* 3154 * Discard message if it is smaller than the IPv6 header 3155 * or if the header is malformed. 3156 */ 3157 if ((mp->b_wptr - rptr) < sizeof (ip6_t) || 3158 IPH_HDR_VERSION((ipha_t *)rptr) != IPV6_VERSION || 3159 icmp->icmp_family != AF_INET6) { 3160 freemsg(mp); 3161 BUMP_MIB(&rawip_mib, rawipInErrors); 3162 return; 3163 } 3164 3165 /* Initialize */ 3166 ipp.ipp_fields = 0; 3167 3168 ip6h = (ip6_t *)rptr; 3169 /* 3170 * Call on ip_find_hdr_v6 which gets the total hdr len 3171 * as well as individual lenghts of ext hdrs (and ptrs to 3172 * them). 3173 */ 3174 if (ip6h->ip6_nxt != icmp->icmp_proto) { 3175 /* Look for ifindex information */ 3176 if (ip6h->ip6_nxt == IPPROTO_RAW) { 3177 ip6i = (ip6i_t *)ip6h; 3178 if (ip6i->ip6i_flags & IP6I_IFINDEX) { 3179 ASSERT(ip6i->ip6i_ifindex != 0); 3180 ipp.ipp_fields |= IPPF_IFINDEX; 3181 ipp.ipp_ifindex = ip6i->ip6i_ifindex; 3182 } 3183 rptr = (uchar_t *)&ip6i[1]; 3184 mp->b_rptr = rptr; 3185 if (rptr == mp->b_wptr) { 3186 mp1 = mp->b_cont; 3187 freeb(mp); 3188 mp = mp1; 3189 rptr = mp->b_rptr; 3190 } 3191 ASSERT(mp->b_wptr - rptr >= IPV6_HDR_LEN); 3192 ip6h = (ip6_t *)rptr; 3193 } 3194 hdr_len = ip_find_hdr_v6(mp, ip6h, &ipp, &nexthdr); 3195 } else { 3196 hdr_len = IPV6_HDR_LEN; 3197 ip6i = NULL; 3198 nexthdr = ip6h->ip6_nxt; 3199 } 3200 /* 3201 * One special case where IP attaches the IRE needs to 3202 * be handled so that we don't send up IRE to the user land. 3203 */ 3204 if (nexthdr == IPPROTO_TCP) { 3205 tcph_t *tcph = (tcph_t *)&mp->b_rptr[hdr_len]; 3206 3207 if (((tcph->th_flags[0] & (TH_SYN|TH_ACK)) == TH_SYN) && 3208 mp->b_cont != NULL) { 3209 mp1 = mp->b_cont; 3210 if (mp1->b_datap->db_type == IRE_DB_TYPE) { 3211 freeb(mp1); 3212 mp->b_cont = NULL; 3213 } 3214 } 3215 } 3216 /* 3217 * Check a filter for ICMPv6 types if needed. 3218 * Verify raw checksums if needed. 3219 */ 3220 if (icmp->icmp_filter != NULL || icmp->icmp_raw_checksum) { 3221 if (icmp->icmp_filter != NULL) { 3222 int type; 3223 3224 /* Assumes that IP has done the pullupmsg */ 3225 type = mp->b_rptr[hdr_len]; 3226 3227 ASSERT(mp->b_rptr + hdr_len <= mp->b_wptr); 3228 if (ICMP6_FILTER_WILLBLOCK(type, icmp->icmp_filter)) { 3229 freemsg(mp); 3230 return; 3231 } 3232 } else { 3233 /* Checksum */ 3234 uint16_t *up; 3235 uint32_t sum; 3236 int remlen; 3237 3238 up = (uint16_t *)&ip6h->ip6_src; 3239 3240 remlen = msgdsize(mp) - hdr_len; 3241 sum = htons(icmp->icmp_proto + remlen) 3242 + up[0] + up[1] + up[2] + up[3] 3243 + up[4] + up[5] + up[6] + up[7] 3244 + up[8] + up[9] + up[10] + up[11] 3245 + up[12] + up[13] + up[14] + up[15]; 3246 sum = (sum & 0xffff) + (sum >> 16); 3247 sum = IP_CSUM(mp, hdr_len, sum); 3248 if (sum != 0) { 3249 /* IPv6 RAW checksum failed */ 3250 ip0dbg(("icmp_rput: RAW checksum " 3251 "failed %x\n", sum)); 3252 freemsg(mp); 3253 BUMP_MIB(&rawip_mib, rawipInCksumErrs); 3254 return; 3255 } 3256 } 3257 } 3258 /* Skip all the IPv6 headers per API */ 3259 mp->b_rptr += hdr_len; 3260 3261 udi_size = sizeof (struct T_unitdata_ind) + sizeof (sin6_t); 3262 3263 /* 3264 * We use local variables icmp_opt and icmp_ipv6_recvhoplimit to 3265 * maintain state information, instead of relying on icmp_t 3266 * structure, since there arent any locks protecting these members 3267 * and there is a window where there might be a race between a 3268 * thread setting options on the write side and a thread reading 3269 * these options on the read size. 3270 */ 3271 if (ipp.ipp_fields & (IPPF_HOPOPTS|IPPF_DSTOPTS|IPPF_RTDSTOPTS| 3272 IPPF_RTHDR|IPPF_IFINDEX)) { 3273 if (icmp->icmp_ipv6_recvhopopts && 3274 (ipp.ipp_fields & IPPF_HOPOPTS)) { 3275 udi_size += sizeof (struct T_opthdr) + 3276 ipp.ipp_hopoptslen; 3277 icmp_opt |= IPPF_HOPOPTS; 3278 } 3279 if ((icmp->icmp_ipv6_recvdstopts || 3280 icmp->icmp_old_ipv6_recvdstopts) && 3281 (ipp.ipp_fields & IPPF_DSTOPTS)) { 3282 udi_size += sizeof (struct T_opthdr) + 3283 ipp.ipp_dstoptslen; 3284 icmp_opt |= IPPF_DSTOPTS; 3285 } 3286 if (((icmp->icmp_ipv6_recvdstopts && 3287 icmp->icmp_ipv6_recvrthdr && 3288 (ipp.ipp_fields & IPPF_RTHDR)) || 3289 icmp->icmp_ipv6_recvrtdstopts) && 3290 (ipp.ipp_fields & IPPF_RTDSTOPTS)) { 3291 udi_size += sizeof (struct T_opthdr) + 3292 ipp.ipp_rtdstoptslen; 3293 icmp_opt |= IPPF_RTDSTOPTS; 3294 } 3295 if (icmp->icmp_ipv6_recvrthdr && 3296 (ipp.ipp_fields & IPPF_RTHDR)) { 3297 udi_size += sizeof (struct T_opthdr) + 3298 ipp.ipp_rthdrlen; 3299 icmp_opt |= IPPF_RTHDR; 3300 } 3301 if (icmp->icmp_ipv6_recvpktinfo && 3302 (ipp.ipp_fields & IPPF_IFINDEX)) { 3303 udi_size += sizeof (struct T_opthdr) + 3304 sizeof (struct in6_pktinfo); 3305 icmp_opt |= IPPF_IFINDEX; 3306 } 3307 } 3308 if (icmp->icmp_ipv6_recvhoplimit) { 3309 udi_size += sizeof (struct T_opthdr) + sizeof (int); 3310 icmp_ipv6_recvhoplimit = B_TRUE; 3311 } 3312 3313 if (icmp->icmp_ipv6_recvtclass) 3314 udi_size += sizeof (struct T_opthdr) + sizeof (int); 3315 3316 mp1 = allocb(udi_size, BPRI_MED); 3317 if (mp1 == NULL) { 3318 freemsg(mp); 3319 BUMP_MIB(&rawip_mib, rawipInErrors); 3320 return; 3321 } 3322 mp1->b_cont = mp; 3323 mp = mp1; 3324 mp->b_datap->db_type = M_PROTO; 3325 tudi = (struct T_unitdata_ind *)mp->b_rptr; 3326 mp->b_wptr = (uchar_t *)tudi + udi_size; 3327 tudi->PRIM_type = T_UNITDATA_IND; 3328 tudi->SRC_length = sizeof (sin6_t); 3329 tudi->SRC_offset = sizeof (struct T_unitdata_ind); 3330 tudi->OPT_offset = sizeof (struct T_unitdata_ind) + sizeof (sin6_t); 3331 udi_size -= (sizeof (struct T_unitdata_ind) + sizeof (sin6_t)); 3332 tudi->OPT_length = udi_size; 3333 sin6 = (sin6_t *)&tudi[1]; 3334 sin6->sin6_port = 0; 3335 sin6->sin6_family = AF_INET6; 3336 3337 sin6->sin6_addr = ip6h->ip6_src; 3338 /* No sin6_flowinfo per API */ 3339 sin6->sin6_flowinfo = 0; 3340 /* For link-scope source pass up scope id */ 3341 if ((ipp.ipp_fields & IPPF_IFINDEX) && 3342 IN6_IS_ADDR_LINKSCOPE(&ip6h->ip6_src)) 3343 sin6->sin6_scope_id = ipp.ipp_ifindex; 3344 else 3345 sin6->sin6_scope_id = 0; 3346 3347 sin6->__sin6_src_id = ip_srcid_find_addr(&ip6h->ip6_dst, 3348 icmp->icmp_zoneid); 3349 3350 if (udi_size != 0) { 3351 uchar_t *dstopt; 3352 3353 dstopt = (uchar_t *)&sin6[1]; 3354 if (icmp_opt & IPPF_IFINDEX) { 3355 struct T_opthdr *toh; 3356 struct in6_pktinfo *pkti; 3357 3358 toh = (struct T_opthdr *)dstopt; 3359 toh->level = IPPROTO_IPV6; 3360 toh->name = IPV6_PKTINFO; 3361 toh->len = sizeof (struct T_opthdr) + 3362 sizeof (*pkti); 3363 toh->status = 0; 3364 dstopt += sizeof (struct T_opthdr); 3365 pkti = (struct in6_pktinfo *)dstopt; 3366 pkti->ipi6_addr = ip6h->ip6_dst; 3367 pkti->ipi6_ifindex = ipp.ipp_ifindex; 3368 dstopt += sizeof (*pkti); 3369 udi_size -= toh->len; 3370 } 3371 if (icmp_ipv6_recvhoplimit) { 3372 struct T_opthdr *toh; 3373 3374 toh = (struct T_opthdr *)dstopt; 3375 toh->level = IPPROTO_IPV6; 3376 toh->name = IPV6_HOPLIMIT; 3377 toh->len = sizeof (struct T_opthdr) + 3378 sizeof (uint_t); 3379 toh->status = 0; 3380 dstopt += sizeof (struct T_opthdr); 3381 *(uint_t *)dstopt = ip6h->ip6_hops; 3382 dstopt += sizeof (uint_t); 3383 udi_size -= toh->len; 3384 } 3385 if (icmp->icmp_ipv6_recvtclass) { 3386 struct T_opthdr *toh; 3387 3388 toh = (struct T_opthdr *)dstopt; 3389 toh->level = IPPROTO_IPV6; 3390 toh->name = IPV6_TCLASS; 3391 toh->len = sizeof (struct T_opthdr) + 3392 sizeof (uint_t); 3393 toh->status = 0; 3394 dstopt += sizeof (struct T_opthdr); 3395 *(uint_t *)dstopt = IPV6_FLOW_TCLASS(ip6h->ip6_flow); 3396 dstopt += sizeof (uint_t); 3397 udi_size -= toh->len; 3398 } 3399 if (icmp_opt & IPPF_HOPOPTS) { 3400 struct T_opthdr *toh; 3401 3402 toh = (struct T_opthdr *)dstopt; 3403 toh->level = IPPROTO_IPV6; 3404 toh->name = IPV6_HOPOPTS; 3405 toh->len = sizeof (struct T_opthdr) + 3406 ipp.ipp_hopoptslen; 3407 toh->status = 0; 3408 dstopt += sizeof (struct T_opthdr); 3409 bcopy(ipp.ipp_hopopts, dstopt, 3410 ipp.ipp_hopoptslen); 3411 dstopt += ipp.ipp_hopoptslen; 3412 udi_size -= toh->len; 3413 } 3414 if (icmp_opt & IPPF_RTDSTOPTS) { 3415 struct T_opthdr *toh; 3416 3417 toh = (struct T_opthdr *)dstopt; 3418 toh->level = IPPROTO_IPV6; 3419 toh->name = IPV6_DSTOPTS; 3420 toh->len = sizeof (struct T_opthdr) + 3421 ipp.ipp_rtdstoptslen; 3422 toh->status = 0; 3423 dstopt += sizeof (struct T_opthdr); 3424 bcopy(ipp.ipp_rtdstopts, dstopt, 3425 ipp.ipp_rtdstoptslen); 3426 dstopt += ipp.ipp_rtdstoptslen; 3427 udi_size -= toh->len; 3428 } 3429 if (icmp_opt & IPPF_RTHDR) { 3430 struct T_opthdr *toh; 3431 3432 toh = (struct T_opthdr *)dstopt; 3433 toh->level = IPPROTO_IPV6; 3434 toh->name = IPV6_RTHDR; 3435 toh->len = sizeof (struct T_opthdr) + 3436 ipp.ipp_rthdrlen; 3437 toh->status = 0; 3438 dstopt += sizeof (struct T_opthdr); 3439 bcopy(ipp.ipp_rthdr, dstopt, ipp.ipp_rthdrlen); 3440 dstopt += ipp.ipp_rthdrlen; 3441 udi_size -= toh->len; 3442 } 3443 if (icmp_opt & IPPF_DSTOPTS) { 3444 struct T_opthdr *toh; 3445 3446 toh = (struct T_opthdr *)dstopt; 3447 toh->level = IPPROTO_IPV6; 3448 toh->name = IPV6_DSTOPTS; 3449 toh->len = sizeof (struct T_opthdr) + 3450 ipp.ipp_dstoptslen; 3451 toh->status = 0; 3452 dstopt += sizeof (struct T_opthdr); 3453 bcopy(ipp.ipp_dstopts, dstopt, 3454 ipp.ipp_dstoptslen); 3455 dstopt += ipp.ipp_dstoptslen; 3456 udi_size -= toh->len; 3457 } 3458 /* Consumed all of allocated space */ 3459 ASSERT(udi_size == 0); 3460 } 3461 BUMP_MIB(&rawip_mib, rawipInDatagrams); 3462 putnext(q, mp); 3463 } 3464 3465 /* 3466 * Process a T_BIND_ACK 3467 */ 3468 static void 3469 icmp_rput_bind_ack(queue_t *q, mblk_t *mp) 3470 { 3471 icmp_t *icmp = (icmp_t *)q->q_ptr; 3472 mblk_t *mp1; 3473 ire_t *ire; 3474 struct T_bind_ack *tba; 3475 uchar_t *addrp; 3476 ipa_conn_t *ac; 3477 ipa6_conn_t *ac6; 3478 3479 /* 3480 * We know if headers are included or not so we can 3481 * safely do this. 3482 */ 3483 if (icmp->icmp_state == TS_UNBND) { 3484 /* 3485 * TPI has not yet bound - bind sent by 3486 * icmp_bind_proto. 3487 */ 3488 freemsg(mp); 3489 return; 3490 } 3491 if (icmp->icmp_discon_pending) 3492 icmp->icmp_discon_pending = 0; 3493 3494 /* 3495 * If a broadcast/multicast address was bound set 3496 * the source address to 0. 3497 * This ensures no datagrams with broadcast address 3498 * as source address are emitted (which would violate 3499 * RFC1122 - Hosts requirements) 3500 * 3501 * Note that when connecting the returned IRE is 3502 * for the destination address and we only perform 3503 * the broadcast check for the source address (it 3504 * is OK to connect to a broadcast/multicast address.) 3505 */ 3506 mp1 = mp->b_cont; 3507 if (mp1 != NULL && mp1->b_datap->db_type == IRE_DB_TYPE) { 3508 ire = (ire_t *)mp1->b_rptr; 3509 3510 /* 3511 * Note: we get IRE_BROADCAST for IPv6 to "mark" a multicast 3512 * local address. 3513 */ 3514 if (ire->ire_type == IRE_BROADCAST && 3515 icmp->icmp_state != TS_DATA_XFER) { 3516 /* This was just a local bind to a MC/broadcast addr */ 3517 V6_SET_ZERO(icmp->icmp_v6src); 3518 if (icmp->icmp_family == AF_INET6) 3519 (void) icmp_build_hdrs(q, icmp); 3520 } else if (V6_OR_V4_INADDR_ANY(icmp->icmp_v6src)) { 3521 /* 3522 * Local address not yet set - pick it from the 3523 * T_bind_ack 3524 */ 3525 tba = (struct T_bind_ack *)mp->b_rptr; 3526 addrp = &mp->b_rptr[tba->ADDR_offset]; 3527 switch (icmp->icmp_family) { 3528 case AF_INET: 3529 if (tba->ADDR_length == sizeof (ipa_conn_t)) { 3530 ac = (ipa_conn_t *)addrp; 3531 } else { 3532 ASSERT(tba->ADDR_length == 3533 sizeof (ipa_conn_x_t)); 3534 ac = &((ipa_conn_x_t *)addrp)->acx_conn; 3535 } 3536 IN6_IPADDR_TO_V4MAPPED(ac->ac_laddr, 3537 &icmp->icmp_v6src); 3538 break; 3539 case AF_INET6: 3540 if (tba->ADDR_length == sizeof (ipa6_conn_t)) { 3541 ac6 = (ipa6_conn_t *)addrp; 3542 } else { 3543 ASSERT(tba->ADDR_length == 3544 sizeof (ipa6_conn_x_t)); 3545 ac6 = &((ipa6_conn_x_t *) 3546 addrp)->ac6x_conn; 3547 } 3548 icmp->icmp_v6src = ac6->ac6_laddr; 3549 (void) icmp_build_hdrs(q, icmp); 3550 } 3551 } 3552 mp1 = mp1->b_cont; 3553 } 3554 /* 3555 * Look for one or more appended ACK message added by 3556 * icmp_connect or icmp_disconnect. 3557 * If none found just send up the T_BIND_ACK. 3558 * icmp_connect has appended a T_OK_ACK and a 3559 * T_CONN_CON. 3560 * icmp_disconnect has appended a T_OK_ACK. 3561 */ 3562 if (mp1 != NULL) { 3563 if (mp->b_cont == mp1) 3564 mp->b_cont = NULL; 3565 else { 3566 ASSERT(mp->b_cont->b_cont == mp1); 3567 mp->b_cont->b_cont = NULL; 3568 } 3569 freemsg(mp); 3570 mp = mp1; 3571 while (mp != NULL) { 3572 mp1 = mp->b_cont; 3573 mp->b_cont = NULL; 3574 putnext(q, mp); 3575 mp = mp1; 3576 } 3577 return; 3578 } 3579 freemsg(mp->b_cont); 3580 mp->b_cont = NULL; 3581 putnext(q, mp); 3582 } 3583 3584 /* 3585 * return SNMP stuff in buffer in mpdata 3586 */ 3587 static int 3588 icmp_snmp_get(queue_t *q, mblk_t *mpctl) 3589 { 3590 mblk_t *mpdata; 3591 struct opthdr *optp; 3592 3593 if (mpctl == NULL || 3594 (mpdata = mpctl->b_cont) == NULL) { 3595 return (0); 3596 } 3597 3598 /* fixed length structure for IPv4 and IPv6 counters */ 3599 optp = (struct opthdr *)&mpctl->b_rptr[sizeof (struct T_optmgmt_ack)]; 3600 optp->level = EXPER_RAWIP; 3601 optp->name = 0; 3602 (void) snmp_append_data(mpdata, (char *)&rawip_mib, sizeof (rawip_mib)); 3603 optp->len = msgdsize(mpdata); 3604 qreply(q, mpctl); 3605 3606 return (1); 3607 } 3608 3609 /* 3610 * Return 0 if invalid set request, 1 otherwise, including non-rawip requests. 3611 * TODO: If this ever actually tries to set anything, it needs to be 3612 * to do the appropriate locking. 3613 */ 3614 /* ARGSUSED */ 3615 static int 3616 icmp_snmp_set(queue_t *q, t_scalar_t level, t_scalar_t name, 3617 uchar_t *ptr, int len) 3618 { 3619 switch (level) { 3620 case EXPER_RAWIP: 3621 return (0); 3622 default: 3623 return (1); 3624 } 3625 } 3626 3627 /* Report for ndd "icmp_status" */ 3628 /* ARGSUSED */ 3629 static int 3630 icmp_status_report(queue_t *q, mblk_t *mp, caddr_t cp, cred_t *cr) 3631 { 3632 IDP idp; 3633 icmp_t *icmp; 3634 char *state; 3635 char laddrbuf[INET6_ADDRSTRLEN]; 3636 char faddrbuf[INET6_ADDRSTRLEN]; 3637 3638 (void) mi_mpprintf(mp, 3639 "RAWIP " MI_COL_HDRPAD_STR 3640 /* 01234567[89ABCDEF] */ 3641 " src addr dest addr state"); 3642 /* xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx UNBOUND */ 3643 3644 3645 for (idp = mi_first_ptr(&icmp_g_head); 3646 (icmp = (icmp_t *)idp) != NULL; 3647 idp = mi_next_ptr(&icmp_g_head, idp)) { 3648 if (icmp->icmp_state == TS_UNBND) 3649 state = "UNBOUND"; 3650 else if (icmp->icmp_state == TS_IDLE) 3651 state = "IDLE"; 3652 else if (icmp->icmp_state == TS_DATA_XFER) 3653 state = "CONNECTED"; 3654 else 3655 state = "UnkState"; 3656 3657 (void) mi_mpprintf(mp, 3658 MI_COL_PTRFMT_STR "%s %s %s", 3659 (void *)icmp, 3660 inet_ntop(AF_INET6, &icmp->icmp_v6dst, faddrbuf, 3661 sizeof (faddrbuf)), 3662 inet_ntop(AF_INET6, &icmp->icmp_v6src, laddrbuf, 3663 sizeof (laddrbuf)), 3664 state); 3665 } 3666 return (0); 3667 } 3668 3669 /* 3670 * This routine creates a T_UDERROR_IND message and passes it upstream. 3671 * The address and options are copied from the T_UNITDATA_REQ message 3672 * passed in mp. This message is freed. 3673 */ 3674 static void 3675 icmp_ud_err(queue_t *q, mblk_t *mp, t_scalar_t err) 3676 { 3677 mblk_t *mp1; 3678 uchar_t *rptr = mp->b_rptr; 3679 struct T_unitdata_req *tudr = (struct T_unitdata_req *)rptr; 3680 3681 mp1 = mi_tpi_uderror_ind((char *)&rptr[tudr->DEST_offset], 3682 tudr->DEST_length, (char *)&rptr[tudr->OPT_offset], 3683 tudr->OPT_length, err); 3684 if (mp1) 3685 qreply(q, mp1); 3686 freemsg(mp); 3687 } 3688 3689 /* 3690 * This routine is called by icmp_wput to handle T_UNBIND_REQ messages. 3691 * After some error checking, the message is passed downstream to ip. 3692 */ 3693 static void 3694 icmp_unbind(queue_t *q, mblk_t *mp) 3695 { 3696 icmp_t *icmp = (icmp_t *)q->q_ptr; 3697 3698 /* If a bind has not been done, we can't unbind. */ 3699 if (icmp->icmp_state == TS_UNBND) { 3700 icmp_err_ack(q, mp, TOUTSTATE, 0); 3701 return; 3702 } 3703 V6_SET_ZERO(icmp->icmp_v6src); 3704 V6_SET_ZERO(icmp->icmp_bound_v6src); 3705 icmp->icmp_state = TS_UNBND; 3706 3707 if (icmp->icmp_family == AF_INET6) { 3708 int error; 3709 3710 /* Rebuild the header template */ 3711 error = icmp_build_hdrs(q, icmp); 3712 if (error != 0) { 3713 icmp_err_ack(q, mp, TSYSERR, error); 3714 return; 3715 } 3716 } 3717 /* Pass the unbind to IP. */ 3718 putnext(q, mp); 3719 } 3720 3721 /* 3722 * Process IPv4 packets that already include an IP header. 3723 * Used when IP_HDRINCL has been set (implicit for IPPROTO_RAW and 3724 * IPPROTO_IGMP). 3725 */ 3726 static void 3727 icmp_wput_hdrincl(queue_t *q, mblk_t *mp, icmp_t *icmp) 3728 { 3729 ipha_t *ipha; 3730 int ip_hdr_length; 3731 int tp_hdr_len; 3732 mblk_t *mp1; 3733 uint_t pkt_len; 3734 3735 ipha = (ipha_t *)mp->b_rptr; 3736 ip_hdr_length = IP_SIMPLE_HDR_LENGTH + icmp->icmp_ip_snd_options_len; 3737 if ((mp->b_wptr - mp->b_rptr) < IP_SIMPLE_HDR_LENGTH) { 3738 if (!pullupmsg(mp, IP_SIMPLE_HDR_LENGTH)) { 3739 BUMP_MIB(&rawip_mib, rawipOutErrors); 3740 freemsg(mp); 3741 return; 3742 } 3743 ipha = (ipha_t *)mp->b_rptr; 3744 } 3745 ipha->ipha_version_and_hdr_length = 3746 (IP_VERSION<<4) | (ip_hdr_length>>2); 3747 3748 /* 3749 * For the socket of SOCK_RAW type, the checksum is provided in the 3750 * pre-built packet. We set the ipha_ident field to IP_HDR_INCLUDED to 3751 * tell IP that the application has sent a complete IP header and not 3752 * to compute the transport checksum nor change the DF flag. 3753 */ 3754 ipha->ipha_ident = IP_HDR_INCLUDED; 3755 ipha->ipha_hdr_checksum = 0; 3756 ipha->ipha_fragment_offset_and_flags &= htons(IPH_DF); 3757 /* Insert options if any */ 3758 if (ip_hdr_length > IP_SIMPLE_HDR_LENGTH) { 3759 /* 3760 * Put the IP header plus any transport header that is 3761 * checksumed by ip_wput into the first mblk. (ip_wput assumes 3762 * that at least the checksum field is in the first mblk.) 3763 */ 3764 switch (ipha->ipha_protocol) { 3765 case IPPROTO_UDP: 3766 tp_hdr_len = 8; 3767 break; 3768 case IPPROTO_TCP: 3769 tp_hdr_len = 20; 3770 break; 3771 default: 3772 tp_hdr_len = 0; 3773 break; 3774 } 3775 /* 3776 * The code below assumes that IP_SIMPLE_HDR_LENGTH plus 3777 * tp_hdr_len bytes will be in a single mblk. 3778 */ 3779 if ((mp->b_wptr - mp->b_rptr) < (IP_SIMPLE_HDR_LENGTH + 3780 tp_hdr_len)) { 3781 if (!pullupmsg(mp, IP_SIMPLE_HDR_LENGTH + 3782 tp_hdr_len)) { 3783 BUMP_MIB(&rawip_mib, rawipOutErrors); 3784 freemsg(mp); 3785 return; 3786 } 3787 ipha = (ipha_t *)mp->b_rptr; 3788 } 3789 3790 /* 3791 * if the length is larger then the max allowed IP packet, 3792 * then send an error and abort the processing. 3793 */ 3794 pkt_len = ntohs(ipha->ipha_length) 3795 + icmp->icmp_ip_snd_options_len; 3796 if (pkt_len > IP_MAXPACKET) { 3797 icmp_ud_err(q, mp, EMSGSIZE); 3798 return; 3799 } 3800 if (!(mp1 = allocb(ip_hdr_length + icmp_wroff_extra + 3801 tp_hdr_len, BPRI_LO))) { 3802 icmp_ud_err(q, mp, ENOMEM); 3803 return; 3804 } 3805 mp1->b_rptr += icmp_wroff_extra; 3806 mp1->b_wptr = mp1->b_rptr + ip_hdr_length; 3807 3808 ipha->ipha_length = htons((uint16_t)pkt_len); 3809 bcopy(ipha, mp1->b_rptr, IP_SIMPLE_HDR_LENGTH); 3810 3811 /* Copy transport header if any */ 3812 bcopy(&ipha[1], mp1->b_wptr, tp_hdr_len); 3813 mp1->b_wptr += tp_hdr_len; 3814 3815 /* Add options */ 3816 ipha = (ipha_t *)mp1->b_rptr; 3817 bcopy(icmp->icmp_ip_snd_options, &ipha[1], 3818 icmp->icmp_ip_snd_options_len); 3819 3820 /* Drop IP header and transport header from original */ 3821 (void) adjmsg(mp, IP_SIMPLE_HDR_LENGTH + tp_hdr_len); 3822 3823 mp1->b_cont = mp; 3824 mp = mp1; 3825 /* 3826 * Massage source route putting first source 3827 * route in ipha_dst. 3828 */ 3829 (void) ip_massage_options(ipha); 3830 } 3831 putnext(q, mp); 3832 } 3833 3834 /* 3835 * This routine handles all messages passed downstream. It either 3836 * consumes the message or passes it downstream; it never queues a 3837 * a message. 3838 */ 3839 static void 3840 icmp_wput(queue_t *q, mblk_t *mp) 3841 { 3842 uchar_t *rptr = mp->b_rptr; 3843 ipha_t *ipha; 3844 mblk_t *mp1; 3845 int ip_hdr_length; 3846 #define tudr ((struct T_unitdata_req *)rptr) 3847 size_t ip_len; 3848 icmp_t *icmp; 3849 sin6_t *sin6; 3850 sin_t *sin; 3851 ipaddr_t v4dst; 3852 3853 icmp = (icmp_t *)q->q_ptr; 3854 if (icmp->icmp_restricted) { 3855 icmp_wput_restricted(q, mp); 3856 return; 3857 } 3858 3859 switch (mp->b_datap->db_type) { 3860 case M_DATA: 3861 if (icmp->icmp_hdrincl) { 3862 ASSERT(icmp->icmp_ipversion == IPV4_VERSION); 3863 icmp_wput_hdrincl(q, mp, icmp); 3864 return; 3865 } 3866 freemsg(mp); 3867 return; 3868 case M_PROTO: 3869 case M_PCPROTO: 3870 ip_len = mp->b_wptr - rptr; 3871 if (ip_len >= sizeof (struct T_unitdata_req)) { 3872 /* Expedite valid T_UNITDATA_REQ to below the switch */ 3873 if (((union T_primitives *)rptr)->type 3874 == T_UNITDATA_REQ) 3875 break; 3876 } 3877 /* FALLTHRU */ 3878 default: 3879 icmp_wput_other(q, mp); 3880 return; 3881 } 3882 3883 /* Handle T_UNITDATA_REQ messages here. */ 3884 3885 if (icmp->icmp_state == TS_UNBND) { 3886 /* If a port has not been bound to the stream, fail. */ 3887 BUMP_MIB(&rawip_mib, rawipOutErrors); 3888 icmp_ud_err(q, mp, EPROTO); 3889 return; 3890 } 3891 mp1 = mp->b_cont; 3892 if (mp1 == NULL) { 3893 BUMP_MIB(&rawip_mib, rawipOutErrors); 3894 icmp_ud_err(q, mp, EPROTO); 3895 return; 3896 } 3897 3898 if ((rptr + tudr->DEST_offset + tudr->DEST_length) > mp->b_wptr) { 3899 BUMP_MIB(&rawip_mib, rawipOutErrors); 3900 icmp_ud_err(q, mp, EADDRNOTAVAIL); 3901 return; 3902 } 3903 3904 switch (icmp->icmp_family) { 3905 case AF_INET6: 3906 sin6 = (sin6_t *)&rptr[tudr->DEST_offset]; 3907 if (!OK_32PTR((char *)sin6) || 3908 tudr->DEST_length != sizeof (sin6_t) || 3909 sin6->sin6_family != AF_INET6) { 3910 BUMP_MIB(&rawip_mib, rawipOutErrors); 3911 icmp_ud_err(q, mp, EADDRNOTAVAIL); 3912 return; 3913 } 3914 3915 /* No support for mapped addresses on raw sockets */ 3916 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 3917 BUMP_MIB(&rawip_mib, rawipOutErrors); 3918 icmp_ud_err(q, mp, EADDRNOTAVAIL); 3919 return; 3920 } 3921 3922 /* 3923 * Destination is a native IPv6 address. 3924 * Send out an IPv6 format packet. 3925 */ 3926 icmp_wput_ipv6(q, mp, sin6, tudr->OPT_length); 3927 return; 3928 3929 case AF_INET: 3930 sin = (sin_t *)&rptr[tudr->DEST_offset]; 3931 if (!OK_32PTR((char *)sin) || 3932 tudr->DEST_length != sizeof (sin_t) || 3933 sin->sin_family != AF_INET) { 3934 BUMP_MIB(&rawip_mib, rawipOutErrors); 3935 icmp_ud_err(q, mp, EADDRNOTAVAIL); 3936 return; 3937 } 3938 /* Extract and ipaddr */ 3939 v4dst = sin->sin_addr.s_addr; 3940 break; 3941 } 3942 3943 /* 3944 * If options passed in, feed it for verification and handling 3945 */ 3946 if (tudr->OPT_length != 0) { 3947 int error; 3948 3949 if (icmp_unitdata_opt_process(q, mp, &error, 3950 (uchar_t *)0) < 0) { 3951 /* failure */ 3952 BUMP_MIB(&rawip_mib, rawipOutErrors); 3953 icmp_ud_err(q, mp, error); 3954 return; 3955 } 3956 /* 3957 * Note: Success in processing options. 3958 * mp option buffer represented by 3959 * OPT_length/offset now potentially modified 3960 * and contain option setting results 3961 */ 3962 } 3963 3964 /* Protocol 255 contains full IP headers */ 3965 if (icmp->icmp_hdrincl) { 3966 freeb(mp); 3967 icmp_wput_hdrincl(q, mp1, icmp); 3968 return; 3969 } 3970 /* Add an IP header */ 3971 ip_hdr_length = IP_SIMPLE_HDR_LENGTH + icmp->icmp_ip_snd_options_len; 3972 ipha = (ipha_t *)&mp1->b_rptr[-ip_hdr_length]; 3973 if ((uchar_t *)ipha < mp1->b_datap->db_base || 3974 mp1->b_datap->db_ref != 1 || 3975 !OK_32PTR(ipha)) { 3976 if (!(mp1 = allocb(ip_hdr_length + icmp_wroff_extra, 3977 BPRI_LO))) { 3978 BUMP_MIB(&rawip_mib, rawipOutErrors); 3979 icmp_ud_err(q, mp1, ENOMEM); 3980 return; 3981 } 3982 mp1->b_cont = mp->b_cont; 3983 ipha = (ipha_t *)mp1->b_datap->db_lim; 3984 mp1->b_wptr = (uchar_t *)ipha; 3985 ipha = (ipha_t *)((uchar_t *)ipha - ip_hdr_length); 3986 } 3987 #ifdef _BIG_ENDIAN 3988 /* Set version, header length, and tos */ 3989 *(uint16_t *)&ipha->ipha_version_and_hdr_length = 3990 ((((IP_VERSION << 4) | (ip_hdr_length>>2)) << 8) | 3991 icmp->icmp_type_of_service); 3992 /* Set ttl and protocol */ 3993 *(uint16_t *)&ipha->ipha_ttl = (icmp->icmp_ttl << 8) | icmp->icmp_proto; 3994 #else 3995 /* Set version, header length, and tos */ 3996 *(uint16_t *)&ipha->ipha_version_and_hdr_length = 3997 ((icmp->icmp_type_of_service << 8) | 3998 ((IP_VERSION << 4) | (ip_hdr_length>>2))); 3999 /* Set ttl and protocol */ 4000 *(uint16_t *)&ipha->ipha_ttl = (icmp->icmp_proto << 8) | icmp->icmp_ttl; 4001 #endif 4002 /* 4003 * Copy our address into the packet. If this is zero, 4004 * ip will fill in the real source address. 4005 */ 4006 IN6_V4MAPPED_TO_IPADDR(&icmp->icmp_v6src, ipha->ipha_src); 4007 ipha->ipha_fragment_offset_and_flags = 0; 4008 4009 /* 4010 * For the socket of SOCK_RAW type, the checksum is provided in the 4011 * pre-built packet. We set the ipha_ident field to IP_HDR_INCLUDED to 4012 * tell IP that the application has sent a complete IP header and not 4013 * to compute the transport checksum nor change the DF flag. 4014 */ 4015 ipha->ipha_ident = IP_HDR_INCLUDED; 4016 4017 /* Finish common formatting of the packet. */ 4018 mp1->b_rptr = (uchar_t *)ipha; 4019 4020 ip_len = mp1->b_wptr - (uchar_t *)ipha; 4021 if (mp1->b_cont != NULL) 4022 ip_len += msgdsize(mp1->b_cont); 4023 4024 /* 4025 * Set the length into the IP header. 4026 * If the length is greater than the maximum allowed by IP, 4027 * then free the message and return. Do not try and send it 4028 * as this can cause problems in layers below. 4029 */ 4030 if (ip_len > IP_MAXPACKET) { 4031 BUMP_MIB(&rawip_mib, rawipOutErrors); 4032 icmp_ud_err(q, mp, EMSGSIZE); 4033 return; 4034 } 4035 ipha->ipha_length = htons((uint16_t)ip_len); 4036 /* 4037 * Copy in the destination address from the T_UNITDATA 4038 * request 4039 */ 4040 if (v4dst == INADDR_ANY) 4041 ipha->ipha_dst = htonl(INADDR_LOOPBACK); 4042 else 4043 ipha->ipha_dst = v4dst; 4044 4045 /* 4046 * Set ttl based on IP_MULTICAST_TTL to match IPv6 logic. 4047 */ 4048 if (CLASSD(v4dst)) 4049 ipha->ipha_ttl = icmp->icmp_multicast_ttl; 4050 4051 /* Copy in options if any */ 4052 if (ip_hdr_length > IP_SIMPLE_HDR_LENGTH) { 4053 bcopy(icmp->icmp_ip_snd_options, 4054 &ipha[1], icmp->icmp_ip_snd_options_len); 4055 /* 4056 * Massage source route putting first source route in ipha_dst. 4057 * Ignore the destination in the T_unitdata_req. 4058 */ 4059 (void) ip_massage_options(ipha); 4060 } 4061 freeb(mp); 4062 BUMP_MIB(&rawip_mib, rawipOutDatagrams); 4063 putnext(q, mp1); 4064 #undef ipha 4065 #undef tudr 4066 } 4067 4068 /* 4069 * icmp_wput_ipv6(): 4070 * Assumes that icmp_wput did some sanity checking on the destination 4071 * address. 4072 */ 4073 void 4074 icmp_wput_ipv6(queue_t *q, mblk_t *mp, sin6_t *sin6, t_scalar_t tudr_optlen) 4075 { 4076 ip6_t *ip6h; 4077 ip6i_t *ip6i; /* mp1->b_rptr even if no ip6i_t */ 4078 mblk_t *mp1; 4079 int ip_hdr_len = IPV6_HDR_LEN; 4080 size_t ip_len; 4081 icmp_t *icmp; 4082 ip6_pkt_t ipp_s; /* For ancillary data options */ 4083 ip6_pkt_t *ipp = &ipp_s; 4084 ip6_pkt_t *tipp; 4085 uint32_t csum = 0; 4086 uint_t ignore = 0; 4087 uint_t option_exists = 0, is_sticky = 0; 4088 uint8_t *cp; 4089 uint8_t *nxthdr_ptr; 4090 4091 icmp = (icmp_t *)q->q_ptr; 4092 4093 /* 4094 * If the local address is a mapped address return 4095 * an error. 4096 * It would be possible to send an IPv6 packet but the 4097 * response would never make it back to the application 4098 * since it is bound to a mapped address. 4099 */ 4100 if (IN6_IS_ADDR_V4MAPPED(&icmp->icmp_v6src)) { 4101 BUMP_MIB(&rawip_mib, rawipOutErrors); 4102 icmp_ud_err(q, mp, EADDRNOTAVAIL); 4103 return; 4104 } 4105 4106 ipp->ipp_fields = 0; 4107 ipp->ipp_sticky_ignored = 0; 4108 4109 /* 4110 * If TPI options passed in, feed it for verification and handling 4111 */ 4112 if (tudr_optlen != 0) { 4113 int error; 4114 4115 if (icmp_unitdata_opt_process(q, mp, &error, 4116 (void *)ipp) < 0) { 4117 /* failure */ 4118 BUMP_MIB(&rawip_mib, rawipOutErrors); 4119 icmp_ud_err(q, mp, error); 4120 return; 4121 } 4122 ignore = ipp->ipp_sticky_ignored; 4123 ASSERT(error == 0); 4124 } 4125 4126 if (sin6->sin6_scope_id != 0 && 4127 IN6_IS_ADDR_LINKSCOPE(&sin6->sin6_addr)) { 4128 /* 4129 * IPPF_SCOPE_ID is special. It's neither a sticky 4130 * option nor ancillary data. It needs to be 4131 * explicitly set in options_exists. 4132 */ 4133 option_exists |= IPPF_SCOPE_ID; 4134 } 4135 4136 if ((icmp->icmp_sticky_ipp.ipp_fields == 0) && 4137 (ipp->ipp_fields == 0)) { 4138 /* No sticky options nor ancillary data. */ 4139 goto no_options; 4140 } 4141 4142 /* 4143 * Go through the options figuring out where each is going to 4144 * come from and build two masks. The first mask indicates if 4145 * the option exists at all. The second mask indicates if the 4146 * option is sticky or ancillary. 4147 */ 4148 if (!(ignore & IPPF_HOPOPTS)) { 4149 if (ipp->ipp_fields & IPPF_HOPOPTS) { 4150 option_exists |= IPPF_HOPOPTS; 4151 ip_hdr_len += ipp->ipp_hopoptslen; 4152 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_HOPOPTS) { 4153 option_exists |= IPPF_HOPOPTS; 4154 is_sticky |= IPPF_HOPOPTS; 4155 ip_hdr_len += icmp->icmp_sticky_ipp.ipp_hopoptslen; 4156 } 4157 } 4158 4159 if (!(ignore & IPPF_RTHDR)) { 4160 if (ipp->ipp_fields & IPPF_RTHDR) { 4161 option_exists |= IPPF_RTHDR; 4162 ip_hdr_len += ipp->ipp_rthdrlen; 4163 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_RTHDR) { 4164 option_exists |= IPPF_RTHDR; 4165 is_sticky |= IPPF_RTHDR; 4166 ip_hdr_len += icmp->icmp_sticky_ipp.ipp_rthdrlen; 4167 } 4168 } 4169 4170 if (!(ignore & IPPF_RTDSTOPTS) && (option_exists & IPPF_RTHDR)) { 4171 /* 4172 * Need to have a router header to use these. 4173 */ 4174 if (ipp->ipp_fields & IPPF_RTDSTOPTS) { 4175 option_exists |= IPPF_RTDSTOPTS; 4176 ip_hdr_len += ipp->ipp_rtdstoptslen; 4177 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_RTDSTOPTS) { 4178 option_exists |= IPPF_RTDSTOPTS; 4179 is_sticky |= IPPF_RTDSTOPTS; 4180 ip_hdr_len += 4181 icmp->icmp_sticky_ipp.ipp_rtdstoptslen; 4182 } 4183 } 4184 4185 if (!(ignore & IPPF_DSTOPTS)) { 4186 if (ipp->ipp_fields & IPPF_DSTOPTS) { 4187 option_exists |= IPPF_DSTOPTS; 4188 ip_hdr_len += ipp->ipp_dstoptslen; 4189 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_DSTOPTS) { 4190 option_exists |= IPPF_DSTOPTS; 4191 is_sticky |= IPPF_DSTOPTS; 4192 ip_hdr_len += icmp->icmp_sticky_ipp.ipp_dstoptslen; 4193 } 4194 } 4195 4196 if (!(ignore & IPPF_IFINDEX)) { 4197 if (ipp->ipp_fields & IPPF_IFINDEX) { 4198 option_exists |= IPPF_IFINDEX; 4199 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_IFINDEX) { 4200 option_exists |= IPPF_IFINDEX; 4201 is_sticky |= IPPF_IFINDEX; 4202 } 4203 } 4204 4205 if (!(ignore & IPPF_ADDR)) { 4206 if (ipp->ipp_fields & IPPF_ADDR) { 4207 option_exists |= IPPF_ADDR; 4208 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_ADDR) { 4209 option_exists |= IPPF_ADDR; 4210 is_sticky |= IPPF_ADDR; 4211 } 4212 } 4213 4214 if (!(ignore & IPPF_DONTFRAG)) { 4215 if (ipp->ipp_fields & IPPF_DONTFRAG) { 4216 option_exists |= IPPF_DONTFRAG; 4217 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_DONTFRAG) { 4218 option_exists |= IPPF_DONTFRAG; 4219 is_sticky |= IPPF_DONTFRAG; 4220 } 4221 } 4222 4223 if (!(ignore & IPPF_USE_MIN_MTU)) { 4224 if (ipp->ipp_fields & IPPF_USE_MIN_MTU) { 4225 option_exists |= IPPF_USE_MIN_MTU; 4226 } else if (icmp->icmp_sticky_ipp.ipp_fields & 4227 IPPF_USE_MIN_MTU) { 4228 option_exists |= IPPF_USE_MIN_MTU; 4229 is_sticky |= IPPF_USE_MIN_MTU; 4230 } 4231 } 4232 4233 if (!(ignore & IPPF_NEXTHOP)) { 4234 if (ipp->ipp_fields & IPPF_NEXTHOP) { 4235 option_exists |= IPPF_NEXTHOP; 4236 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_NEXTHOP) { 4237 option_exists |= IPPF_NEXTHOP; 4238 is_sticky |= IPPF_NEXTHOP; 4239 } 4240 } 4241 4242 if (!(ignore & IPPF_HOPLIMIT)) { 4243 if (ipp->ipp_fields & IPPF_HOPLIMIT) { 4244 option_exists |= IPPF_HOPLIMIT; 4245 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_HOPLIMIT) { 4246 option_exists |= IPPF_HOPLIMIT; 4247 is_sticky |= IPPF_HOPLIMIT; 4248 } 4249 } 4250 4251 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_NO_CKSUM) { 4252 /* This is a sticky socket option only */ 4253 option_exists |= IPPF_NO_CKSUM; 4254 is_sticky |= IPPF_NO_CKSUM; 4255 } 4256 4257 if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_RAW_CKSUM) { 4258 /* This is a sticky socket option only */ 4259 option_exists |= IPPF_RAW_CKSUM; 4260 is_sticky |= IPPF_RAW_CKSUM; 4261 } 4262 4263 if (!(ignore & IPPF_TCLASS)) { 4264 if (ipp->ipp_fields & IPPF_TCLASS) { 4265 option_exists |= IPPF_TCLASS; 4266 } else if (icmp->icmp_sticky_ipp.ipp_fields & IPPF_TCLASS) { 4267 option_exists |= IPPF_TCLASS; 4268 is_sticky |= IPPF_TCLASS; 4269 } 4270 } 4271 4272 no_options: 4273 4274 /* 4275 * If any options carried in the ip6i_t were specified, we 4276 * need to account for the ip6i_t in the data we'll be sending 4277 * down. 4278 */ 4279 if (option_exists & IPPF_HAS_IP6I) 4280 ip_hdr_len += sizeof (ip6i_t); 4281 4282 /* check/fix buffer config, setup pointers into it */ 4283 mp1 = mp->b_cont; 4284 ip6h = (ip6_t *)&mp1->b_rptr[-ip_hdr_len]; 4285 if ((mp1->b_datap->db_ref != 1) || 4286 ((unsigned char *)ip6h < mp1->b_datap->db_base) || 4287 !OK_32PTR(ip6h)) { 4288 /* Try to get everything in a single mblk next time */ 4289 if (ip_hdr_len > icmp->icmp_max_hdr_len) { 4290 icmp->icmp_max_hdr_len = ip_hdr_len; 4291 (void) mi_set_sth_wroff(RD(q), 4292 icmp->icmp_max_hdr_len + icmp_wroff_extra); 4293 } 4294 mp1 = allocb(ip_hdr_len + icmp_wroff_extra, BPRI_LO); 4295 if (!mp1) { 4296 BUMP_MIB(&rawip_mib, rawipOutErrors); 4297 icmp_ud_err(q, mp, ENOMEM); 4298 return; 4299 } 4300 mp1->b_cont = mp->b_cont; 4301 mp1->b_wptr = mp1->b_datap->db_lim; 4302 ip6h = (ip6_t *)(mp1->b_wptr - ip_hdr_len); 4303 } 4304 mp1->b_rptr = (unsigned char *)ip6h; 4305 ip6i = (ip6i_t *)ip6h; 4306 4307 #define ANCIL_OR_STICKY_PTR(f) ((is_sticky & f) ? &icmp->icmp_sticky_ipp : ipp) 4308 if (option_exists & IPPF_HAS_IP6I) { 4309 ip6h = (ip6_t *)&ip6i[1]; 4310 ip6i->ip6i_flags = 0; 4311 ip6i->ip6i_vcf = IPV6_DEFAULT_VERS_AND_FLOW; 4312 4313 /* sin6_scope_id takes precendence over IPPF_IFINDEX */ 4314 if (option_exists & IPPF_SCOPE_ID) { 4315 ip6i->ip6i_flags |= IP6I_IFINDEX; 4316 ip6i->ip6i_ifindex = sin6->sin6_scope_id; 4317 } else if (option_exists & IPPF_IFINDEX) { 4318 tipp = ANCIL_OR_STICKY_PTR(IPPF_IFINDEX); 4319 ASSERT(tipp->ipp_ifindex != 0); 4320 ip6i->ip6i_flags |= IP6I_IFINDEX; 4321 ip6i->ip6i_ifindex = tipp->ipp_ifindex; 4322 } 4323 4324 if (option_exists & IPPF_RAW_CKSUM) { 4325 ip6i->ip6i_flags |= IP6I_RAW_CHECKSUM; 4326 ip6i->ip6i_checksum_off = icmp->icmp_checksum_off; 4327 } 4328 4329 if (option_exists & IPPF_NO_CKSUM) { 4330 ip6i->ip6i_flags |= IP6I_NO_ULP_CKSUM; 4331 } 4332 4333 if (option_exists & IPPF_ADDR) { 4334 /* 4335 * Enable per-packet source address verification if 4336 * IPV6_PKTINFO specified the source address. 4337 * ip6_src is set in the transport's _wput function. 4338 */ 4339 ip6i->ip6i_flags |= IP6I_VERIFY_SRC; 4340 } 4341 4342 if (option_exists & IPPF_DONTFRAG) { 4343 ip6i->ip6i_flags |= IP6I_DONTFRAG; 4344 } 4345 4346 if (option_exists & IPPF_USE_MIN_MTU) { 4347 ip6i->ip6i_flags = IP6I_API_USE_MIN_MTU( 4348 ip6i->ip6i_flags, ipp->ipp_use_min_mtu); 4349 } 4350 4351 if (option_exists & IPPF_NEXTHOP) { 4352 tipp = ANCIL_OR_STICKY_PTR(IPPF_NEXTHOP); 4353 ASSERT(!IN6_IS_ADDR_UNSPECIFIED(&tipp->ipp_nexthop)); 4354 ip6i->ip6i_flags |= IP6I_NEXTHOP; 4355 ip6i->ip6i_nexthop = tipp->ipp_nexthop; 4356 } 4357 4358 /* 4359 * tell IP this is an ip6i_t private header 4360 */ 4361 ip6i->ip6i_nxt = IPPROTO_RAW; 4362 } 4363 4364 /* Initialize IPv6 header */ 4365 ip6h->ip6_vcf = IPV6_DEFAULT_VERS_AND_FLOW; 4366 bzero(&ip6h->ip6_src, sizeof (ip6h->ip6_src)); 4367 4368 if (option_exists & IPPF_HOPLIMIT) { 4369 tipp = ANCIL_OR_STICKY_PTR(IPPF_HOPLIMIT); 4370 ip6h->ip6_hops = tipp->ipp_hoplimit; 4371 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 4372 (icmp->icmp_sticky_ipp.ipp_fields & IPPF_MULTI_HOPLIMIT)) { 4373 ip6h->ip6_hops = icmp->icmp_multicast_ttl; 4374 ip6i->ip6i_flags |= IP6I_HOPLIMIT; 4375 } else { 4376 ip6h->ip6_hops = icmp->icmp_ttl; 4377 } 4378 4379 if (option_exists & IPPF_ADDR) { 4380 tipp = ANCIL_OR_STICKY_PTR(IPPF_ADDR); 4381 ASSERT(!IN6_IS_ADDR_UNSPECIFIED(&tipp->ipp_addr)); 4382 ip6h->ip6_src = tipp->ipp_addr; 4383 } else { 4384 /* 4385 * The source address was not set using IPV6_PKTINFO. 4386 * First look at the bound source. 4387 * If unspecified fallback to __sin6_src_id. 4388 */ 4389 ip6h->ip6_src = icmp->icmp_v6src; 4390 if (sin6->__sin6_src_id != 0 && 4391 IN6_IS_ADDR_UNSPECIFIED(&ip6h->ip6_src)) { 4392 ip_srcid_find_id(sin6->__sin6_src_id, 4393 &ip6h->ip6_src, icmp->icmp_zoneid); 4394 } 4395 } 4396 4397 nxthdr_ptr = (uint8_t *)&ip6h->ip6_nxt; 4398 cp = (uint8_t *)&ip6h[1]; 4399 4400 /* 4401 * Here's where we have to start stringing together 4402 * any extension headers in the right order: 4403 * Hop-by-hop, destination, routing, and final destination opts. 4404 */ 4405 if (option_exists & IPPF_HOPOPTS) { 4406 /* Hop-by-hop options */ 4407 ip6_hbh_t *hbh = (ip6_hbh_t *)cp; 4408 tipp = ANCIL_OR_STICKY_PTR(IPPF_HOPOPTS); 4409 4410 *nxthdr_ptr = IPPROTO_HOPOPTS; 4411 nxthdr_ptr = &hbh->ip6h_nxt; 4412 4413 bcopy(tipp->ipp_hopopts, cp, tipp->ipp_hopoptslen); 4414 cp += tipp->ipp_hopoptslen; 4415 } 4416 /* 4417 * En-route destination options 4418 * Only do them if there's a routing header as well 4419 */ 4420 if (option_exists & IPPF_RTDSTOPTS) { 4421 ip6_dest_t *dst = (ip6_dest_t *)cp; 4422 tipp = ANCIL_OR_STICKY_PTR(IPPF_RTDSTOPTS); 4423 4424 *nxthdr_ptr = IPPROTO_DSTOPTS; 4425 nxthdr_ptr = &dst->ip6d_nxt; 4426 4427 bcopy(tipp->ipp_rtdstopts, cp, tipp->ipp_rtdstoptslen); 4428 cp += tipp->ipp_rtdstoptslen; 4429 } 4430 /* 4431 * Routing header next 4432 */ 4433 if (option_exists & IPPF_RTHDR) { 4434 ip6_rthdr_t *rt = (ip6_rthdr_t *)cp; 4435 tipp = ANCIL_OR_STICKY_PTR(IPPF_RTHDR); 4436 4437 *nxthdr_ptr = IPPROTO_ROUTING; 4438 nxthdr_ptr = &rt->ip6r_nxt; 4439 4440 bcopy(tipp->ipp_rthdr, cp, tipp->ipp_rthdrlen); 4441 cp += tipp->ipp_rthdrlen; 4442 } 4443 /* 4444 * Do ultimate destination options 4445 */ 4446 if (option_exists & IPPF_DSTOPTS) { 4447 ip6_dest_t *dest = (ip6_dest_t *)cp; 4448 tipp = ANCIL_OR_STICKY_PTR(IPPF_DSTOPTS); 4449 4450 *nxthdr_ptr = IPPROTO_DSTOPTS; 4451 nxthdr_ptr = &dest->ip6d_nxt; 4452 4453 bcopy(tipp->ipp_dstopts, cp, tipp->ipp_dstoptslen); 4454 cp += tipp->ipp_dstoptslen; 4455 } 4456 4457 /* 4458 * Now set the last header pointer to the proto passed in 4459 */ 4460 ASSERT((int)(cp - (uint8_t *)ip6i) == ip_hdr_len); 4461 *nxthdr_ptr = icmp->icmp_proto; 4462 4463 /* 4464 * Copy in the destination address 4465 */ 4466 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 4467 ip6h->ip6_dst = ipv6_loopback; 4468 else 4469 ip6h->ip6_dst = sin6->sin6_addr; 4470 4471 ip6h->ip6_vcf = 4472 (IPV6_DEFAULT_VERS_AND_FLOW & IPV6_VERS_AND_FLOW_MASK) | 4473 (sin6->sin6_flowinfo & ~IPV6_VERS_AND_FLOW_MASK); 4474 4475 if (option_exists & IPPF_TCLASS) { 4476 tipp = ANCIL_OR_STICKY_PTR(IPPF_TCLASS); 4477 ip6h->ip6_vcf = IPV6_TCLASS_FLOW(ip6h->ip6_vcf, 4478 tipp->ipp_tclass); 4479 } 4480 if (option_exists & IPPF_RTHDR) { 4481 ip6_rthdr_t *rth; 4482 4483 /* 4484 * Perform any processing needed for source routing. 4485 * We know that all extension headers will be in the same mblk 4486 * as the IPv6 header. 4487 */ 4488 rth = ip_find_rthdr_v6(ip6h, mp1->b_wptr); 4489 if (rth != NULL && rth->ip6r_segleft != 0) { 4490 if (rth->ip6r_type != IPV6_RTHDR_TYPE_0) { 4491 /* 4492 * Drop packet - only support Type 0 routing. 4493 * Notify the application as well. 4494 */ 4495 icmp_ud_err(q, mp, EPROTO); 4496 BUMP_MIB(&rawip_mib, rawipOutErrors); 4497 return; 4498 } 4499 /* 4500 * rth->ip6r_len is twice the number of 4501 * addresses in the header 4502 */ 4503 if (rth->ip6r_len & 0x1) { 4504 icmp_ud_err(q, mp, EPROTO); 4505 BUMP_MIB(&rawip_mib, rawipOutErrors); 4506 return; 4507 } 4508 /* 4509 * Shuffle the routing header and ip6_dst 4510 * addresses, and get the checksum difference 4511 * between the first hop (in ip6_dst) and 4512 * the destination (in the last routing hdr entry). 4513 */ 4514 csum = ip_massage_options_v6(ip6h, rth); 4515 /* 4516 * Verify that the first hop isn't a mapped address. 4517 * Routers along the path need to do this verification 4518 * for subsequent hops. 4519 */ 4520 if (IN6_IS_ADDR_V4MAPPED(&ip6h->ip6_dst)) { 4521 icmp_ud_err(q, mp, EADDRNOTAVAIL); 4522 BUMP_MIB(&rawip_mib, rawipOutErrors); 4523 return; 4524 } 4525 } 4526 } 4527 4528 ip_len = mp1->b_wptr - (uchar_t *)ip6h - IPV6_HDR_LEN; 4529 if (mp1->b_cont != NULL) 4530 ip_len += msgdsize(mp1->b_cont); 4531 4532 /* 4533 * Set the length into the IP header. 4534 * If the length is greater than the maximum allowed by IP, 4535 * then free the message and return. Do not try and send it 4536 * as this can cause problems in layers below. 4537 */ 4538 if (ip_len > IP_MAXPACKET) { 4539 BUMP_MIB(&rawip_mib, rawipOutErrors); 4540 icmp_ud_err(q, mp1, EMSGSIZE); 4541 return; 4542 } 4543 if (icmp->icmp_proto == IPPROTO_ICMPV6 || icmp->icmp_raw_checksum) { 4544 uint_t cksum_off; /* From ip6i == mp1->b_rptr */ 4545 uint16_t *cksum_ptr; 4546 uint_t ext_hdrs_len; 4547 4548 /* ICMPv6 must have an offset matching icmp6_cksum offset */ 4549 ASSERT(icmp->icmp_proto != IPPROTO_ICMPV6 || 4550 icmp->icmp_checksum_off == 2); 4551 4552 /* 4553 * We make it easy for IP to include our pseudo header 4554 * by putting our length in uh_checksum, modified (if 4555 * we have a routing header) by the checksum difference 4556 * between the ultimate destination and first hop addresses. 4557 * Note: ICMPv6 must always checksum the packet. 4558 */ 4559 cksum_off = ip_hdr_len + icmp->icmp_checksum_off; 4560 if (cksum_off + sizeof (uint16_t) > mp1->b_wptr - mp1->b_rptr) { 4561 if (!pullupmsg(mp1, cksum_off + sizeof (uint16_t))) { 4562 BUMP_MIB(&rawip_mib, rawipOutErrors); 4563 freemsg(mp); 4564 return; 4565 } 4566 ip6i = (ip6i_t *)mp1->b_rptr; 4567 if (ip6i->ip6i_nxt == IPPROTO_RAW) 4568 ip6h = (ip6_t *)&ip6i[1]; 4569 else 4570 ip6h = (ip6_t *)ip6i; 4571 } 4572 /* Add payload length to checksum */ 4573 ext_hdrs_len = ip_hdr_len - IPV6_HDR_LEN - 4574 (int)((uchar_t *)ip6h - (uchar_t *)ip6i); 4575 csum += htons(ip_len - ext_hdrs_len); 4576 4577 cksum_ptr = (uint16_t *)((uchar_t *)ip6i + cksum_off); 4578 csum = (csum & 0xFFFF) + (csum >> 16); 4579 *cksum_ptr = (uint16_t)csum; 4580 } 4581 4582 #ifdef _LITTLE_ENDIAN 4583 ip_len = htons(ip_len); 4584 #endif 4585 ip6h->ip6_plen = (uint16_t)ip_len; 4586 4587 freeb(mp); 4588 4589 /* We're done. Pass the packet to IP */ 4590 BUMP_MIB(&rawip_mib, rawipOutDatagrams); 4591 putnext(q, mp1); 4592 } 4593 4594 static void 4595 icmp_wput_other(queue_t *q, mblk_t *mp) 4596 { 4597 uchar_t *rptr = mp->b_rptr; 4598 struct iocblk *iocp; 4599 #define tudr ((struct T_unitdata_req *)rptr) 4600 icmp_t *icmp; 4601 cred_t *cr; 4602 4603 icmp = (icmp_t *)q->q_ptr; 4604 4605 cr = DB_CREDDEF(mp, icmp->icmp_credp); 4606 4607 switch (mp->b_datap->db_type) { 4608 case M_PROTO: 4609 case M_PCPROTO: 4610 if (mp->b_wptr - rptr < sizeof (t_scalar_t)) { 4611 /* 4612 * If the message does not contain a PRIM_type, 4613 * throw it away. 4614 */ 4615 freemsg(mp); 4616 return; 4617 } 4618 switch (((union T_primitives *)rptr)->type) { 4619 case T_ADDR_REQ: 4620 icmp_addr_req(q, mp); 4621 return; 4622 case O_T_BIND_REQ: 4623 case T_BIND_REQ: 4624 qwriter(q, mp, icmp_bind, PERIM_OUTER); 4625 return; 4626 case T_CONN_REQ: 4627 icmp_connect(q, mp); 4628 return; 4629 case T_CAPABILITY_REQ: 4630 icmp_capability_req(q, mp); 4631 return; 4632 case T_INFO_REQ: 4633 icmp_info_req(q, mp); 4634 return; 4635 case T_UNITDATA_REQ: 4636 /* 4637 * If a T_UNITDATA_REQ gets here, the address must 4638 * be bad. Valid T_UNITDATA_REQs are found above 4639 * and break to below this switch. 4640 */ 4641 icmp_ud_err(q, mp, EADDRNOTAVAIL); 4642 return; 4643 case T_UNBIND_REQ: 4644 icmp_unbind(q, mp); 4645 return; 4646 4647 case T_SVR4_OPTMGMT_REQ: 4648 if (!snmpcom_req(q, mp, icmp_snmp_set, icmp_snmp_get, 4649 cr)) 4650 /* Only IP can return anything meaningful */ 4651 (void) svr4_optcom_req(q, mp, cr, 4652 &icmp_opt_obj); 4653 return; 4654 4655 case T_OPTMGMT_REQ: 4656 /* Only IP can return anything meaningful */ 4657 (void) tpi_optcom_req(q, mp, cr, &icmp_opt_obj); 4658 return; 4659 4660 case T_DISCON_REQ: 4661 icmp_disconnect(q, mp); 4662 return; 4663 4664 /* The following TPI message is not supported by icmp. */ 4665 case O_T_CONN_RES: 4666 case T_CONN_RES: 4667 icmp_err_ack(q, mp, TNOTSUPPORT, 0); 4668 return; 4669 4670 /* The following 3 TPI requests are illegal for icmp. */ 4671 case T_DATA_REQ: 4672 case T_EXDATA_REQ: 4673 case T_ORDREL_REQ: 4674 freemsg(mp); 4675 (void) putctl1(RD(q), M_ERROR, EPROTO); 4676 return; 4677 default: 4678 break; 4679 } 4680 break; 4681 case M_IOCTL: 4682 iocp = (struct iocblk *)mp->b_rptr; 4683 switch (iocp->ioc_cmd) { 4684 case TI_GETPEERNAME: 4685 if (icmp->icmp_state != TS_DATA_XFER) { 4686 /* 4687 * If a default destination address has not 4688 * been associated with the stream, then we 4689 * don't know the peer's name. 4690 */ 4691 iocp->ioc_error = ENOTCONN; 4692 err_ret:; 4693 iocp->ioc_count = 0; 4694 mp->b_datap->db_type = M_IOCACK; 4695 qreply(q, mp); 4696 return; 4697 } 4698 /* FALLTHRU */ 4699 case TI_GETMYNAME: 4700 /* 4701 * For TI_GETPEERNAME and TI_GETMYNAME, we first 4702 * need to copyin the user's strbuf structure. 4703 * Processing will continue in the M_IOCDATA case 4704 * below. 4705 */ 4706 mi_copyin(q, mp, NULL, 4707 SIZEOF_STRUCT(strbuf, iocp->ioc_flag)); 4708 return; 4709 case ND_SET: 4710 /* nd_getset performs the necessary error checking */ 4711 case ND_GET: 4712 if (nd_getset(q, icmp_g_nd, mp)) { 4713 qreply(q, mp); 4714 return; 4715 } 4716 break; 4717 default: 4718 break; 4719 } 4720 break; 4721 case M_IOCDATA: 4722 icmp_wput_iocdata(q, mp); 4723 return; 4724 default: 4725 break; 4726 } 4727 putnext(q, mp); 4728 } 4729 4730 /* 4731 * icmp_wput_iocdata is called by icmp_wput_slow to handle all M_IOCDATA 4732 * messages. 4733 */ 4734 static void 4735 icmp_wput_iocdata(queue_t *q, mblk_t *mp) 4736 { 4737 mblk_t *mp1; 4738 STRUCT_HANDLE(strbuf, sb); 4739 icmp_t *icmp; 4740 in6_addr_t v6addr; 4741 ipaddr_t v4addr; 4742 uint32_t flowinfo = 0; 4743 int addrlen; 4744 4745 /* Make sure it is one of ours. */ 4746 switch (((struct iocblk *)mp->b_rptr)->ioc_cmd) { 4747 case TI_GETMYNAME: 4748 case TI_GETPEERNAME: 4749 break; 4750 default: 4751 putnext(q, mp); 4752 return; 4753 } 4754 switch (mi_copy_state(q, mp, &mp1)) { 4755 case -1: 4756 return; 4757 case MI_COPY_CASE(MI_COPY_IN, 1): 4758 break; 4759 case MI_COPY_CASE(MI_COPY_OUT, 1): 4760 /* 4761 * The address has been copied out, so now 4762 * copyout the strbuf. 4763 */ 4764 mi_copyout(q, mp); 4765 return; 4766 case MI_COPY_CASE(MI_COPY_OUT, 2): 4767 /* 4768 * The address and strbuf have been copied out. 4769 * We're done, so just acknowledge the original 4770 * M_IOCTL. 4771 */ 4772 mi_copy_done(q, mp, 0); 4773 return; 4774 default: 4775 /* 4776 * Something strange has happened, so acknowledge 4777 * the original M_IOCTL with an EPROTO error. 4778 */ 4779 mi_copy_done(q, mp, EPROTO); 4780 return; 4781 } 4782 /* 4783 * Now we have the strbuf structure for TI_GETMYNAME 4784 * and TI_GETPEERNAME. Next we copyout the requested 4785 * address and then we'll copyout the strbuf. 4786 */ 4787 STRUCT_SET_HANDLE(sb, ((struct iocblk *)mp->b_rptr)->ioc_flag, 4788 (void *)mp1->b_rptr); 4789 icmp = (icmp_t *)q->q_ptr; 4790 if (icmp->icmp_family == AF_INET) 4791 addrlen = sizeof (sin_t); 4792 else 4793 addrlen = sizeof (sin6_t); 4794 4795 if (STRUCT_FGET(sb, maxlen) < addrlen) { 4796 mi_copy_done(q, mp, EINVAL); 4797 return; 4798 } 4799 switch (((struct iocblk *)mp->b_rptr)->ioc_cmd) { 4800 case TI_GETMYNAME: 4801 if (icmp->icmp_family == AF_INET) { 4802 ASSERT(icmp->icmp_ipversion == IPV4_VERSION); 4803 if (!IN6_IS_ADDR_V4MAPPED_ANY(&icmp->icmp_v6src) && 4804 !IN6_IS_ADDR_UNSPECIFIED(&icmp->icmp_v6src)) { 4805 v4addr = V4_PART_OF_V6(icmp->icmp_v6src); 4806 } else { 4807 /* 4808 * INADDR_ANY 4809 * icmp_v6src is not set, we might be bound to 4810 * broadcast/multicast. Use icmp_bound_v6src as 4811 * local address instead (that could 4812 * also still be INADDR_ANY) 4813 */ 4814 v4addr = V4_PART_OF_V6(icmp->icmp_bound_v6src); 4815 } 4816 } else { 4817 /* icmp->icmp_family == AF_INET6 */ 4818 if (!IN6_IS_ADDR_UNSPECIFIED(&icmp->icmp_v6src)) { 4819 v6addr = icmp->icmp_v6src; 4820 } else { 4821 /* 4822 * UNSPECIFIED 4823 * icmp_v6src is not set, we might be bound to 4824 * broadcast/multicast. Use icmp_bound_v6src as 4825 * local address instead (that could 4826 * also still be UNSPECIFIED) 4827 */ 4828 v6addr = icmp->icmp_bound_v6src; 4829 } 4830 } 4831 break; 4832 case TI_GETPEERNAME: 4833 if (icmp->icmp_family == AF_INET) { 4834 ASSERT(icmp->icmp_ipversion == IPV4_VERSION); 4835 v4addr = V4_PART_OF_V6(icmp->icmp_v6dst); 4836 } else { 4837 /* icmp->icmp_family == AF_INET6) */ 4838 v6addr = icmp->icmp_v6dst; 4839 flowinfo = icmp->icmp_flowinfo; 4840 } 4841 break; 4842 default: 4843 mi_copy_done(q, mp, EPROTO); 4844 return; 4845 } 4846 mp1 = mi_copyout_alloc(q, mp, STRUCT_FGETP(sb, buf), addrlen, B_TRUE); 4847 if (!mp1) 4848 return; 4849 4850 if (icmp->icmp_family == AF_INET) { 4851 sin_t *sin; 4852 4853 STRUCT_FSET(sb, len, (int)sizeof (sin_t)); 4854 sin = (sin_t *)mp1->b_rptr; 4855 mp1->b_wptr = (uchar_t *)&sin[1]; 4856 *sin = sin_null; 4857 sin->sin_family = AF_INET; 4858 sin->sin_addr.s_addr = v4addr; 4859 } else { 4860 /* icmp->icmp_family == AF_INET6 */ 4861 sin6_t *sin6; 4862 4863 ASSERT(icmp->icmp_family == AF_INET6); 4864 STRUCT_FSET(sb, len, (int)sizeof (sin6_t)); 4865 sin6 = (sin6_t *)mp1->b_rptr; 4866 mp1->b_wptr = (uchar_t *)&sin6[1]; 4867 *sin6 = sin6_null; 4868 sin6->sin6_family = AF_INET6; 4869 sin6->sin6_flowinfo = flowinfo; 4870 sin6->sin6_addr = v6addr; 4871 } 4872 /* Copy out the address */ 4873 mi_copyout(q, mp); 4874 } 4875 4876 /* 4877 * Only allow MIB requests and M_FLUSHes to pass. 4878 * All other messages are nacked or dropped. 4879 */ 4880 static void 4881 icmp_wput_restricted(queue_t *q, mblk_t *mp) 4882 { 4883 cred_t *cr; 4884 icmp_t *icmp; 4885 4886 switch (DB_TYPE(mp)) { 4887 case M_PROTO: 4888 case M_PCPROTO: 4889 if (MBLKL(mp) < sizeof (t_scalar_t)) { 4890 freemsg(mp); 4891 return; 4892 } 4893 icmp = (icmp_t *)q->q_ptr; 4894 cr = DB_CREDDEF(mp, icmp->icmp_credp); 4895 4896 switch (((union T_primitives *)mp->b_rptr)->type) { 4897 case T_SVR4_OPTMGMT_REQ: 4898 if (!snmpcom_req(q, mp, 4899 icmp_snmp_set, icmp_snmp_get, cr)) 4900 (void) svr4_optcom_req(q, mp, cr, 4901 &icmp_opt_obj); 4902 return; 4903 case T_OPTMGMT_REQ: 4904 (void) tpi_optcom_req(q, mp, cr, &icmp_opt_obj); 4905 return; 4906 default: 4907 icmp_err_ack(q, mp, TSYSERR, ENOTSUP); 4908 return; 4909 } 4910 /* NOTREACHED */ 4911 case M_IOCTL: 4912 miocnak(q, mp, 0, ENOTSUP); 4913 break; 4914 case M_FLUSH: 4915 putnext(q, mp); 4916 break; 4917 default: 4918 freemsg(mp); 4919 break; 4920 } 4921 } 4922 4923 static int 4924 icmp_unitdata_opt_process(queue_t *q, mblk_t *mp, int *errorp, 4925 void *thisdg_attrs) 4926 { 4927 icmp_t *icmp; 4928 struct T_unitdata_req *udreqp; 4929 int is_absreq_failure; 4930 cred_t *cr; 4931 4932 icmp = (icmp_t *)q->q_ptr; 4933 4934 udreqp = (struct T_unitdata_req *)mp->b_rptr; 4935 *errorp = 0; 4936 4937 cr = DB_CREDDEF(mp, icmp->icmp_credp); 4938 4939 *errorp = tpi_optcom_buf(q, mp, &udreqp->OPT_length, 4940 udreqp->OPT_offset, cr, &icmp_opt_obj, 4941 thisdg_attrs, &is_absreq_failure); 4942 4943 if (*errorp != 0) { 4944 /* 4945 * Note: No special action needed in this 4946 * module for "is_absreq_failure" 4947 */ 4948 return (-1); /* failure */ 4949 } 4950 ASSERT(is_absreq_failure == 0); 4951 return (0); /* success */ 4952 } 4953 4954 void 4955 icmp_ddi_init(void) 4956 { 4957 ICMP6_MAJ = ddi_name_to_major(ICMP6); 4958 icmp_max_optsize = 4959 optcom_max_optsize(icmp_opt_obj.odb_opt_des_arr, 4960 icmp_opt_obj.odb_opt_arr_cnt); 4961 4962 (void) icmp_param_register(icmp_param_arr, A_CNT(icmp_param_arr)); 4963 4964 rawip_kstat_init(); 4965 } 4966 4967 void 4968 icmp_ddi_destroy(void) 4969 { 4970 nd_free(&icmp_g_nd); 4971 4972 rawip_kstat_fini(); 4973 } 4974 4975 static void 4976 rawip_kstat_init(void) { 4977 4978 rawip_named_kstat_t template = { 4979 { "inDatagrams", KSTAT_DATA_UINT32, 0 }, 4980 { "inCksumErrs", KSTAT_DATA_UINT32, 0 }, 4981 { "inErrors", KSTAT_DATA_UINT32, 0 }, 4982 { "outDatagrams", KSTAT_DATA_UINT32, 0 }, 4983 { "outErrors", KSTAT_DATA_UINT32, 0 }, 4984 }; 4985 4986 rawip_mibkp = kstat_create("icmp", 0, "rawip", "mib2", 4987 KSTAT_TYPE_NAMED, 4988 NUM_OF_FIELDS(rawip_named_kstat_t), 4989 0); 4990 if (rawip_mibkp == NULL) 4991 return; 4992 4993 bcopy(&template, rawip_mibkp->ks_data, sizeof (template)); 4994 4995 rawip_mibkp->ks_update = rawip_kstat_update; 4996 4997 kstat_install(rawip_mibkp); 4998 } 4999 5000 static void 5001 rawip_kstat_fini(void) { 5002 if (rawip_mibkp) { 5003 kstat_delete(rawip_mibkp); 5004 rawip_mibkp = NULL; 5005 } 5006 } 5007 5008 static int 5009 rawip_kstat_update(kstat_t *kp, int rw) { 5010 rawip_named_kstat_t *rawipkp; 5011 5012 if ((kp == NULL) || (kp->ks_data == NULL)) 5013 return (EIO); 5014 5015 if (rw == KSTAT_WRITE) 5016 return (EACCES); 5017 5018 rawipkp = (rawip_named_kstat_t *)kp->ks_data; 5019 5020 rawipkp->inDatagrams.value.ui32 = rawip_mib.rawipInDatagrams; 5021 rawipkp->inCksumErrs.value.ui32 = rawip_mib.rawipInCksumErrs; 5022 rawipkp->inErrors.value.ui32 = rawip_mib.rawipInErrors; 5023 rawipkp->outDatagrams.value.ui32 = rawip_mib.rawipOutDatagrams; 5024 rawipkp->outErrors.value.ui32 = rawip_mib.rawipOutErrors; 5025 5026 return (0); 5027 } 5028