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