1c793af95Ssangeeta /* 2c793af95Ssangeeta * CDDL HEADER START 3c793af95Ssangeeta * 4c793af95Ssangeeta * The contents of this file are subject to the terms of the 5c793af95Ssangeeta * Common Development and Distribution License (the "License"). 6c793af95Ssangeeta * You may not use this file except in compliance with the License. 7c793af95Ssangeeta * 8c793af95Ssangeeta * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9c793af95Ssangeeta * or http://www.opensolaris.org/os/licensing. 10c793af95Ssangeeta * See the License for the specific language governing permissions 11c793af95Ssangeeta * and limitations under the License. 12c793af95Ssangeeta * 13c793af95Ssangeeta * When distributing Covered Code, include this CDDL HEADER in each 14c793af95Ssangeeta * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15c793af95Ssangeeta * If applicable, add the following below this CDDL HEADER, with the 16c793af95Ssangeeta * fields enclosed by brackets "[]" replaced with your own identifying 17c793af95Ssangeeta * information: Portions Copyright [yyyy] [name of copyright owner] 18c793af95Ssangeeta * 19c793af95Ssangeeta * CDDL HEADER END 20c793af95Ssangeeta */ 21c793af95Ssangeeta /* 22*e11c3f44Smeem * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23c793af95Ssangeeta * Use is subject to license terms. 24c793af95Ssangeeta */ 25c793af95Ssangeeta 26c793af95Ssangeeta /* 27c793af95Ssangeeta * This file contains consumer routines of the IPv4 forwarding engine 28c793af95Ssangeeta */ 29c793af95Ssangeeta 30c793af95Ssangeeta #include <sys/types.h> 31c793af95Ssangeeta #include <sys/stream.h> 32c793af95Ssangeeta #include <sys/stropts.h> 33c793af95Ssangeeta #include <sys/strlog.h> 34c793af95Ssangeeta #include <sys/dlpi.h> 35c793af95Ssangeeta #include <sys/ddi.h> 36c793af95Ssangeeta #include <sys/cmn_err.h> 37c793af95Ssangeeta #include <sys/policy.h> 38c793af95Ssangeeta 39c793af95Ssangeeta #include <sys/systm.h> 40c793af95Ssangeeta #include <sys/strsun.h> 41c793af95Ssangeeta #include <sys/kmem.h> 42c793af95Ssangeeta #include <sys/param.h> 43c793af95Ssangeeta #include <sys/socket.h> 44edd26dc5Sdr146992 #include <sys/strsubr.h> 45edd26dc5Sdr146992 #include <sys/pattr.h> 46c793af95Ssangeeta #include <net/if.h> 47c793af95Ssangeeta #include <net/route.h> 48c793af95Ssangeeta #include <netinet/in.h> 49c793af95Ssangeeta #include <net/if_dl.h> 50c793af95Ssangeeta #include <netinet/ip6.h> 51c793af95Ssangeeta #include <netinet/icmp6.h> 52c793af95Ssangeeta 53c793af95Ssangeeta #include <inet/common.h> 54c793af95Ssangeeta #include <inet/mi.h> 55c793af95Ssangeeta #include <inet/mib2.h> 56c793af95Ssangeeta #include <inet/ip.h> 57edd26dc5Sdr146992 #include <inet/ip_impl.h> 58c793af95Ssangeeta #include <inet/ip6.h> 59c793af95Ssangeeta #include <inet/ip_ndp.h> 60c793af95Ssangeeta #include <inet/arp.h> 61c793af95Ssangeeta #include <inet/ip_if.h> 62c793af95Ssangeeta #include <inet/ip_ire.h> 63c793af95Ssangeeta #include <inet/ip_ftable.h> 64c793af95Ssangeeta #include <inet/ip_rts.h> 65c793af95Ssangeeta #include <inet/nd.h> 66c793af95Ssangeeta 67c793af95Ssangeeta #include <net/pfkeyv2.h> 68c793af95Ssangeeta #include <inet/ipsec_info.h> 69c793af95Ssangeeta #include <inet/sadb.h> 70c793af95Ssangeeta #include <inet/tcp.h> 71c793af95Ssangeeta #include <inet/ipclassifier.h> 72c793af95Ssangeeta #include <sys/zone.h> 73c793af95Ssangeeta #include <net/radix.h> 74c793af95Ssangeeta #include <sys/tsol/label.h> 75c793af95Ssangeeta #include <sys/tsol/tnet.h> 76c793af95Ssangeeta 77c793af95Ssangeeta #define IS_DEFAULT_ROUTE(ire) \ 78c793af95Ssangeeta (((ire)->ire_type & IRE_DEFAULT) || \ 79c793af95Ssangeeta (((ire)->ire_type & IRE_INTERFACE) && ((ire)->ire_addr == 0))) 80c793af95Ssangeeta 81c793af95Ssangeeta /* 82c793af95Ssangeeta * structure for passing args between ire_ftable_lookup and ire_find_best_route 83c793af95Ssangeeta */ 84c793af95Ssangeeta typedef struct ire_ftable_args_s { 85c793af95Ssangeeta ipaddr_t ift_addr; 86c793af95Ssangeeta ipaddr_t ift_mask; 87c793af95Ssangeeta ipaddr_t ift_gateway; 88c793af95Ssangeeta int ift_type; 89c793af95Ssangeeta const ipif_t *ift_ipif; 90c793af95Ssangeeta zoneid_t ift_zoneid; 91c793af95Ssangeeta uint32_t ift_ihandle; 92c793af95Ssangeeta const ts_label_t *ift_tsl; 93c793af95Ssangeeta int ift_flags; 94c793af95Ssangeeta ire_t *ift_best_ire; 95c793af95Ssangeeta } ire_ftable_args_t; 96c793af95Ssangeeta 97f4b3ec61Sdh155122 static ire_t *route_to_dst(const struct sockaddr *, zoneid_t, ip_stack_t *); 98f4b3ec61Sdh155122 static ire_t *ire_round_robin(irb_t *, zoneid_t, ire_ftable_args_t *, 99f4b3ec61Sdh155122 ip_stack_t *); 100c793af95Ssangeeta static void ire_del_host_redir(ire_t *, char *); 101c793af95Ssangeeta static boolean_t ire_find_best_route(struct radix_node *, void *); 102edd26dc5Sdr146992 static int ip_send_align_hcksum_flags(mblk_t *, ill_t *); 103da14cebeSEric Cheng static ire_t *ire_ftable_lookup_simple(ipaddr_t, 104da14cebeSEric Cheng ire_t **, zoneid_t, int, ip_stack_t *); 105c793af95Ssangeeta 106c793af95Ssangeeta /* 107c793af95Ssangeeta * Lookup a route in forwarding table. A specific lookup is indicated by 108c793af95Ssangeeta * passing the required parameters and indicating the match required in the 109c793af95Ssangeeta * flag field. 110c793af95Ssangeeta * 111c793af95Ssangeeta * Looking for default route can be done in three ways 112c793af95Ssangeeta * 1) pass mask as 0 and set MATCH_IRE_MASK in flags field 113c793af95Ssangeeta * along with other matches. 114c793af95Ssangeeta * 2) pass type as IRE_DEFAULT and set MATCH_IRE_TYPE in flags 115c793af95Ssangeeta * field along with other matches. 116c793af95Ssangeeta * 3) if the destination and mask are passed as zeros. 117c793af95Ssangeeta * 118c793af95Ssangeeta * A request to return a default route if no route 119c793af95Ssangeeta * is found, can be specified by setting MATCH_IRE_DEFAULT 120c793af95Ssangeeta * in flags. 121c793af95Ssangeeta * 122c793af95Ssangeeta * It does not support recursion more than one level. It 123c793af95Ssangeeta * will do recursive lookup only when the lookup maps to 124c793af95Ssangeeta * a prefix or default route and MATCH_IRE_RECURSIVE flag is passed. 125c793af95Ssangeeta * 126c793af95Ssangeeta * If the routing table is setup to allow more than one level 127c793af95Ssangeeta * of recursion, the cleaning up cache table will not work resulting 128c793af95Ssangeeta * in invalid routing. 129c793af95Ssangeeta * 130c793af95Ssangeeta * Supports IP_BOUND_IF by following the ipif/ill when recursing. 131c793af95Ssangeeta * 132c793af95Ssangeeta * NOTE : When this function returns NULL, pire has already been released. 133c793af95Ssangeeta * pire is valid only when this function successfully returns an 134c793af95Ssangeeta * ire. 135c793af95Ssangeeta */ 136c793af95Ssangeeta ire_t * 137c793af95Ssangeeta ire_ftable_lookup(ipaddr_t addr, ipaddr_t mask, ipaddr_t gateway, 138c793af95Ssangeeta int type, const ipif_t *ipif, ire_t **pire, zoneid_t zoneid, 139f4b3ec61Sdh155122 uint32_t ihandle, const ts_label_t *tsl, int flags, ip_stack_t *ipst) 140c793af95Ssangeeta { 141c793af95Ssangeeta ire_t *ire = NULL; 142c793af95Ssangeeta ipaddr_t gw_addr; 143c793af95Ssangeeta struct rt_sockaddr rdst, rmask; 144c793af95Ssangeeta struct rt_entry *rt; 145c793af95Ssangeeta ire_ftable_args_t margs; 146c793af95Ssangeeta boolean_t found_incomplete = B_FALSE; 147c793af95Ssangeeta 148c793af95Ssangeeta ASSERT(ipif == NULL || !ipif->ipif_isv6); 149c793af95Ssangeeta 150c793af95Ssangeeta /* 151c793af95Ssangeeta * When we return NULL from this function, we should make 152c793af95Ssangeeta * sure that *pire is NULL so that the callers will not 153c793af95Ssangeeta * wrongly REFRELE the pire. 154c793af95Ssangeeta */ 155c793af95Ssangeeta if (pire != NULL) 156c793af95Ssangeeta *pire = NULL; 157c793af95Ssangeeta /* 158c793af95Ssangeeta * ire_match_args() will dereference ipif MATCH_IRE_SRC or 159c793af95Ssangeeta * MATCH_IRE_ILL is set. 160c793af95Ssangeeta */ 161*e11c3f44Smeem if ((flags & (MATCH_IRE_SRC | MATCH_IRE_ILL)) && (ipif == NULL)) 162c793af95Ssangeeta return (NULL); 163c793af95Ssangeeta 164c793af95Ssangeeta (void) memset(&rdst, 0, sizeof (rdst)); 165c793af95Ssangeeta rdst.rt_sin_len = sizeof (rdst); 166c793af95Ssangeeta rdst.rt_sin_family = AF_INET; 167c793af95Ssangeeta rdst.rt_sin_addr.s_addr = addr; 168c793af95Ssangeeta 169c793af95Ssangeeta (void) memset(&rmask, 0, sizeof (rmask)); 170c793af95Ssangeeta rmask.rt_sin_len = sizeof (rmask); 171c793af95Ssangeeta rmask.rt_sin_family = AF_INET; 172c793af95Ssangeeta rmask.rt_sin_addr.s_addr = mask; 173c793af95Ssangeeta 174c793af95Ssangeeta (void) memset(&margs, 0, sizeof (margs)); 175c793af95Ssangeeta margs.ift_addr = addr; 176c793af95Ssangeeta margs.ift_mask = mask; 177c793af95Ssangeeta margs.ift_gateway = gateway; 178c793af95Ssangeeta margs.ift_type = type; 179c793af95Ssangeeta margs.ift_ipif = ipif; 180c793af95Ssangeeta margs.ift_zoneid = zoneid; 181c793af95Ssangeeta margs.ift_ihandle = ihandle; 182c793af95Ssangeeta margs.ift_tsl = tsl; 183c793af95Ssangeeta margs.ift_flags = flags; 184c793af95Ssangeeta 185c793af95Ssangeeta /* 186c793af95Ssangeeta * The flags argument passed to ire_ftable_lookup may cause the 187c793af95Ssangeeta * search to return, not the longest matching prefix, but the 188c793af95Ssangeeta * "best matching prefix", i.e., the longest prefix that also 189c793af95Ssangeeta * satisfies constraints imposed via the permutation of flags 190c793af95Ssangeeta * passed in. To achieve this, we invoke ire_match_args() on 191c793af95Ssangeeta * each matching leaf in the radix tree. ire_match_args is 192c793af95Ssangeeta * invoked by the callback function ire_find_best_route() 193c793af95Ssangeeta * We hold the global tree lock in read mode when calling 194c793af95Ssangeeta * rn_match_args.Before dropping the global tree lock, ensure 195c793af95Ssangeeta * that the radix node can't be deleted by incrementing ire_refcnt. 196c793af95Ssangeeta */ 197f4b3ec61Sdh155122 RADIX_NODE_HEAD_RLOCK(ipst->ips_ip_ftable); 198f4b3ec61Sdh155122 rt = (struct rt_entry *)ipst->ips_ip_ftable->rnh_matchaddr_args(&rdst, 199f4b3ec61Sdh155122 ipst->ips_ip_ftable, ire_find_best_route, &margs); 200c793af95Ssangeeta ire = margs.ift_best_ire; 201f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 202c793af95Ssangeeta 203c793af95Ssangeeta if (rt == NULL) { 204c793af95Ssangeeta return (NULL); 205c793af95Ssangeeta } else { 206c793af95Ssangeeta ASSERT(ire != NULL); 207c793af95Ssangeeta } 208c793af95Ssangeeta 209c793af95Ssangeeta DTRACE_PROBE2(ire__found, ire_ftable_args_t *, &margs, ire_t *, ire); 210c793af95Ssangeeta 211c793af95Ssangeeta if (!IS_DEFAULT_ROUTE(ire)) 212c793af95Ssangeeta goto found_ire_held; 213c793af95Ssangeeta /* 214c793af95Ssangeeta * If default route is found, see if default matching criteria 215c793af95Ssangeeta * are satisfied. 216c793af95Ssangeeta */ 217c793af95Ssangeeta if (flags & MATCH_IRE_MASK) { 218c793af95Ssangeeta /* 219c793af95Ssangeeta * we were asked to match a 0 mask, and came back with 220c793af95Ssangeeta * a default route. Ok to return it. 221c793af95Ssangeeta */ 222c793af95Ssangeeta goto found_default_ire; 223c793af95Ssangeeta } 224c793af95Ssangeeta if ((flags & MATCH_IRE_TYPE) && 225c793af95Ssangeeta (type & (IRE_DEFAULT | IRE_INTERFACE))) { 226c793af95Ssangeeta /* 227c793af95Ssangeeta * we were asked to match a default ire type. Ok to return it. 228c793af95Ssangeeta */ 229c793af95Ssangeeta goto found_default_ire; 230c793af95Ssangeeta } 231c793af95Ssangeeta if (flags & MATCH_IRE_DEFAULT) { 232c793af95Ssangeeta goto found_default_ire; 233c793af95Ssangeeta } 234c793af95Ssangeeta /* 235c793af95Ssangeeta * we found a default route, but default matching criteria 236c793af95Ssangeeta * are not specified and we are not explicitly looking for 237c793af95Ssangeeta * default. 238c793af95Ssangeeta */ 239c793af95Ssangeeta IRE_REFRELE(ire); 240c793af95Ssangeeta return (NULL); 241c793af95Ssangeeta found_default_ire: 242c793af95Ssangeeta /* 243c793af95Ssangeeta * round-robin only if we have more than one route in the bucket. 244c793af95Ssangeeta */ 245c793af95Ssangeeta if ((ire->ire_bucket->irb_ire_cnt > 1) && 246c793af95Ssangeeta IS_DEFAULT_ROUTE(ire) && 247c793af95Ssangeeta ((flags & (MATCH_IRE_DEFAULT | MATCH_IRE_MASK)) == 248c793af95Ssangeeta MATCH_IRE_DEFAULT)) { 249c793af95Ssangeeta ire_t *next_ire; 250c793af95Ssangeeta 251f4b3ec61Sdh155122 next_ire = ire_round_robin(ire->ire_bucket, zoneid, &margs, 252f4b3ec61Sdh155122 ipst); 253c793af95Ssangeeta IRE_REFRELE(ire); 254c793af95Ssangeeta if (next_ire != NULL) { 255c793af95Ssangeeta ire = next_ire; 256c793af95Ssangeeta } else { 257c793af95Ssangeeta /* no route */ 258c793af95Ssangeeta return (NULL); 259c793af95Ssangeeta } 260c793af95Ssangeeta } 261c793af95Ssangeeta found_ire_held: 262c793af95Ssangeeta if ((flags & MATCH_IRE_RJ_BHOLE) && 263c793af95Ssangeeta (ire->ire_flags & (RTF_BLACKHOLE | RTF_REJECT))) { 264c793af95Ssangeeta return (ire); 265c793af95Ssangeeta } 266c793af95Ssangeeta /* 267c793af95Ssangeeta * At this point, IRE that was found must be an IRE_FORWARDTABLE 268c793af95Ssangeeta * type. If this is a recursive lookup and an IRE_INTERFACE type was 269c793af95Ssangeeta * found, return that. If it was some other IRE_FORWARDTABLE type of 270c793af95Ssangeeta * IRE (one of the prefix types), then it is necessary to fill in the 271c793af95Ssangeeta * parent IRE pointed to by pire, and then lookup the gateway address of 272c793af95Ssangeeta * the parent. For backwards compatiblity, if this lookup returns an 273c793af95Ssangeeta * IRE other than a IRE_CACHETABLE or IRE_INTERFACE, then one more level 274c793af95Ssangeeta * of lookup is done. 275c793af95Ssangeeta */ 276c793af95Ssangeeta if (flags & MATCH_IRE_RECURSIVE) { 277c793af95Ssangeeta ipif_t *gw_ipif; 278c793af95Ssangeeta int match_flags = MATCH_IRE_DSTONLY; 279c793af95Ssangeeta ire_t *save_ire; 280c793af95Ssangeeta 281c793af95Ssangeeta if (ire->ire_type & IRE_INTERFACE) 282c793af95Ssangeeta return (ire); 283c793af95Ssangeeta if (pire != NULL) 284c793af95Ssangeeta *pire = ire; 285c793af95Ssangeeta /* 286c793af95Ssangeeta * If we can't find an IRE_INTERFACE or the caller has not 287c793af95Ssangeeta * asked for pire, we need to REFRELE the save_ire. 288c793af95Ssangeeta */ 289c793af95Ssangeeta save_ire = ire; 290c793af95Ssangeeta 291*e11c3f44Smeem if (ire->ire_ipif != NULL) 292*e11c3f44Smeem match_flags |= MATCH_IRE_ILL; 293*e11c3f44Smeem 294c793af95Ssangeeta /* 295c793af95Ssangeeta * ire_ftable_lookup may end up with an incomplete IRE_CACHE 296c793af95Ssangeeta * entry for the gateway (i.e., one for which the 297c793af95Ssangeeta * ire_nce->nce_state is not yet ND_REACHABLE). If the caller 298c793af95Ssangeeta * has specified MATCH_IRE_COMPLETE, such entries will not 299c793af95Ssangeeta * be returned; instead, we return the IF_RESOLVER ire. 300c793af95Ssangeeta */ 301c793af95Ssangeeta ire = ire_route_lookup(ire->ire_gateway_addr, 0, 0, 0, 302f4b3ec61Sdh155122 ire->ire_ipif, NULL, zoneid, tsl, match_flags, ipst); 303c793af95Ssangeeta DTRACE_PROBE2(ftable__route__lookup1, (ire_t *), ire, 304c793af95Ssangeeta (ire_t *), save_ire); 305c793af95Ssangeeta if (ire == NULL || 306c793af95Ssangeeta ((ire->ire_type & IRE_CACHE) && ire->ire_nce && 307c793af95Ssangeeta ire->ire_nce->nce_state != ND_REACHABLE && 308c793af95Ssangeeta (flags & MATCH_IRE_COMPLETE))) { 309c793af95Ssangeeta /* 310c793af95Ssangeeta * Do not release the parent ire if MATCH_IRE_PARENT 311c793af95Ssangeeta * is set. Also return it via ire. 312c793af95Ssangeeta */ 313c793af95Ssangeeta if (ire != NULL) { 314c793af95Ssangeeta ire_refrele(ire); 315c793af95Ssangeeta ire = NULL; 316c793af95Ssangeeta found_incomplete = B_TRUE; 317c793af95Ssangeeta } 318c793af95Ssangeeta if (flags & MATCH_IRE_PARENT) { 319c793af95Ssangeeta if (pire != NULL) { 320c793af95Ssangeeta /* 321c793af95Ssangeeta * Need an extra REFHOLD, if the parent 322c793af95Ssangeeta * ire is returned via both ire and 323c793af95Ssangeeta * pire. 324c793af95Ssangeeta */ 325c793af95Ssangeeta IRE_REFHOLD(save_ire); 326c793af95Ssangeeta } 327c793af95Ssangeeta ire = save_ire; 328c793af95Ssangeeta } else { 329c793af95Ssangeeta ire_refrele(save_ire); 330c793af95Ssangeeta if (pire != NULL) 331c793af95Ssangeeta *pire = NULL; 332c793af95Ssangeeta } 333c793af95Ssangeeta if (!found_incomplete) 334c793af95Ssangeeta return (ire); 335c793af95Ssangeeta } 336c793af95Ssangeeta if (ire->ire_type & (IRE_CACHETABLE | IRE_INTERFACE)) { 337c793af95Ssangeeta /* 338c793af95Ssangeeta * If the caller did not ask for pire, release 339c793af95Ssangeeta * it now. 340c793af95Ssangeeta */ 341c793af95Ssangeeta if (pire == NULL) { 342c793af95Ssangeeta ire_refrele(save_ire); 343c793af95Ssangeeta } 344c793af95Ssangeeta return (ire); 345c793af95Ssangeeta } 346c793af95Ssangeeta match_flags |= MATCH_IRE_TYPE; 347c793af95Ssangeeta gw_addr = ire->ire_gateway_addr; 348c793af95Ssangeeta gw_ipif = ire->ire_ipif; 349c793af95Ssangeeta ire_refrele(ire); 350c793af95Ssangeeta ire = ire_route_lookup(gw_addr, 0, 0, 351c793af95Ssangeeta (found_incomplete? IRE_INTERFACE : 352c793af95Ssangeeta (IRE_CACHETABLE | IRE_INTERFACE)), 353f4b3ec61Sdh155122 gw_ipif, NULL, zoneid, tsl, match_flags, ipst); 354c793af95Ssangeeta DTRACE_PROBE2(ftable__route__lookup2, (ire_t *), ire, 355c793af95Ssangeeta (ire_t *), save_ire); 356c793af95Ssangeeta if (ire == NULL || 357c793af95Ssangeeta ((ire->ire_type & IRE_CACHE) && ire->ire_nce && 358c793af95Ssangeeta ire->ire_nce->nce_state != ND_REACHABLE && 359c793af95Ssangeeta (flags & MATCH_IRE_COMPLETE))) { 360c793af95Ssangeeta /* 361c793af95Ssangeeta * Do not release the parent ire if MATCH_IRE_PARENT 362c793af95Ssangeeta * is set. Also return it via ire. 363c793af95Ssangeeta */ 364c793af95Ssangeeta if (ire != NULL) { 365c793af95Ssangeeta ire_refrele(ire); 366c793af95Ssangeeta ire = NULL; 367c793af95Ssangeeta } 368c793af95Ssangeeta if (flags & MATCH_IRE_PARENT) { 369c793af95Ssangeeta if (pire != NULL) { 370c793af95Ssangeeta /* 371c793af95Ssangeeta * Need an extra REFHOLD, if the 372c793af95Ssangeeta * parent ire is returned via both 373c793af95Ssangeeta * ire and pire. 374c793af95Ssangeeta */ 375c793af95Ssangeeta IRE_REFHOLD(save_ire); 376c793af95Ssangeeta } 377c793af95Ssangeeta ire = save_ire; 378c793af95Ssangeeta } else { 379c793af95Ssangeeta ire_refrele(save_ire); 380c793af95Ssangeeta if (pire != NULL) 381c793af95Ssangeeta *pire = NULL; 382c793af95Ssangeeta } 383c793af95Ssangeeta return (ire); 384c793af95Ssangeeta } else if (pire == NULL) { 385c793af95Ssangeeta /* 386c793af95Ssangeeta * If the caller did not ask for pire, release 387c793af95Ssangeeta * it now. 388c793af95Ssangeeta */ 389c793af95Ssangeeta ire_refrele(save_ire); 390c793af95Ssangeeta } 391c793af95Ssangeeta return (ire); 392c793af95Ssangeeta } 393c793af95Ssangeeta ASSERT(pire == NULL || *pire == NULL); 394c793af95Ssangeeta return (ire); 395c793af95Ssangeeta } 396c793af95Ssangeeta 397da14cebeSEric Cheng /* 398da14cebeSEric Cheng * This function is called by 399da14cebeSEric Cheng * ip_fast_forward->ire_forward_simple 400da14cebeSEric Cheng * The optimizations of this function over ire_ftable_lookup are: 401da14cebeSEric Cheng * o removing unnecessary flag matching 402da14cebeSEric Cheng * o doing longest prefix match instead of overloading it further 403da14cebeSEric Cheng * with the unnecessary "best_prefix_match" 404da14cebeSEric Cheng * o Does not do round robin of default route for every packet 405da14cebeSEric Cheng * o inlines code of ire_ctable_lookup to look for nexthop cache 406da14cebeSEric Cheng * entry before calling ire_route_lookup 407da14cebeSEric Cheng */ 408da14cebeSEric Cheng static ire_t * 409da14cebeSEric Cheng ire_ftable_lookup_simple(ipaddr_t addr, 410da14cebeSEric Cheng ire_t **pire, zoneid_t zoneid, int flags, 411da14cebeSEric Cheng ip_stack_t *ipst) 412da14cebeSEric Cheng { 413da14cebeSEric Cheng ire_t *ire = NULL; 414da14cebeSEric Cheng ire_t *tmp_ire = NULL; 415da14cebeSEric Cheng struct rt_sockaddr rdst; 416da14cebeSEric Cheng struct rt_entry *rt; 417da14cebeSEric Cheng irb_t *irb_ptr; 418da14cebeSEric Cheng ire_t *save_ire; 419da14cebeSEric Cheng int match_flags; 420da14cebeSEric Cheng 421da14cebeSEric Cheng rdst.rt_sin_len = sizeof (rdst); 422da14cebeSEric Cheng rdst.rt_sin_family = AF_INET; 423da14cebeSEric Cheng rdst.rt_sin_addr.s_addr = addr; 424da14cebeSEric Cheng 425da14cebeSEric Cheng /* 426da14cebeSEric Cheng * This is basically inlining a simpler version of ire_match_args 427da14cebeSEric Cheng */ 428da14cebeSEric Cheng RADIX_NODE_HEAD_RLOCK(ipst->ips_ip_ftable); 429da14cebeSEric Cheng 430da14cebeSEric Cheng rt = (struct rt_entry *)ipst->ips_ip_ftable->rnh_matchaddr_args(&rdst, 431da14cebeSEric Cheng ipst->ips_ip_ftable, NULL, NULL); 432da14cebeSEric Cheng 433da14cebeSEric Cheng if (rt == NULL) { 434da14cebeSEric Cheng RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 435da14cebeSEric Cheng return (NULL); 436da14cebeSEric Cheng } 437da14cebeSEric Cheng irb_ptr = &rt->rt_irb; 438da14cebeSEric Cheng if (irb_ptr == NULL || irb_ptr->irb_ire_cnt == 0) { 439da14cebeSEric Cheng RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 440da14cebeSEric Cheng return (NULL); 441da14cebeSEric Cheng } 442da14cebeSEric Cheng 443da14cebeSEric Cheng rw_enter(&irb_ptr->irb_lock, RW_READER); 444da14cebeSEric Cheng for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 445da14cebeSEric Cheng if (ire->ire_zoneid == zoneid) 446da14cebeSEric Cheng break; 447da14cebeSEric Cheng } 448da14cebeSEric Cheng 449da14cebeSEric Cheng if (ire == NULL || (ire->ire_marks & IRE_MARK_CONDEMNED)) { 450da14cebeSEric Cheng rw_exit(&irb_ptr->irb_lock); 451da14cebeSEric Cheng RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 452da14cebeSEric Cheng return (NULL); 453da14cebeSEric Cheng } 454da14cebeSEric Cheng /* we have a ire that matches */ 455da14cebeSEric Cheng if (ire != NULL) 456da14cebeSEric Cheng IRE_REFHOLD(ire); 457da14cebeSEric Cheng rw_exit(&irb_ptr->irb_lock); 458da14cebeSEric Cheng RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 459da14cebeSEric Cheng 460da14cebeSEric Cheng if ((flags & MATCH_IRE_RJ_BHOLE) && 461da14cebeSEric Cheng (ire->ire_flags & (RTF_BLACKHOLE | RTF_REJECT))) { 462da14cebeSEric Cheng return (ire); 463da14cebeSEric Cheng } 464da14cebeSEric Cheng /* 465da14cebeSEric Cheng * At this point, IRE that was found must be an IRE_FORWARDTABLE 466da14cebeSEric Cheng * type. If this is a recursive lookup and an IRE_INTERFACE type was 467da14cebeSEric Cheng * found, return that. If it was some other IRE_FORWARDTABLE type of 468da14cebeSEric Cheng * IRE (one of the prefix types), then it is necessary to fill in the 469da14cebeSEric Cheng * parent IRE pointed to by pire, and then lookup the gateway address of 470da14cebeSEric Cheng * the parent. For backwards compatiblity, if this lookup returns an 471da14cebeSEric Cheng * IRE other than a IRE_CACHETABLE or IRE_INTERFACE, then one more level 472da14cebeSEric Cheng * of lookup is done. 473da14cebeSEric Cheng */ 474da14cebeSEric Cheng match_flags = MATCH_IRE_DSTONLY; 475da14cebeSEric Cheng 476da14cebeSEric Cheng if (ire->ire_type & IRE_INTERFACE) 477da14cebeSEric Cheng return (ire); 478da14cebeSEric Cheng *pire = ire; 479da14cebeSEric Cheng /* 480da14cebeSEric Cheng * If we can't find an IRE_INTERFACE or the caller has not 481da14cebeSEric Cheng * asked for pire, we need to REFRELE the save_ire. 482da14cebeSEric Cheng */ 483da14cebeSEric Cheng save_ire = ire; 484da14cebeSEric Cheng 485da14cebeSEric Cheng /* 486da14cebeSEric Cheng * Currently MATCH_IRE_ILL is never used with 487da14cebeSEric Cheng * (MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT) while 488da14cebeSEric Cheng * sending out packets as MATCH_IRE_ILL is used only 489da14cebeSEric Cheng * for communicating with on-link hosts. We can't assert 490da14cebeSEric Cheng * that here as RTM_GET calls this function with 491da14cebeSEric Cheng * MATCH_IRE_ILL | MATCH_IRE_DEFAULT | MATCH_IRE_RECURSIVE. 492da14cebeSEric Cheng * We have already used the MATCH_IRE_ILL in determining 493da14cebeSEric Cheng * the right prefix route at this point. To match the 494da14cebeSEric Cheng * behavior of how we locate routes while sending out 495da14cebeSEric Cheng * packets, we don't want to use MATCH_IRE_ILL below 496da14cebeSEric Cheng * while locating the interface route. 497da14cebeSEric Cheng * 498da14cebeSEric Cheng * ire_ftable_lookup may end up with an incomplete IRE_CACHE 499da14cebeSEric Cheng * entry for the gateway (i.e., one for which the 500da14cebeSEric Cheng * ire_nce->nce_state is not yet ND_REACHABLE). If the caller 501da14cebeSEric Cheng * has specified MATCH_IRE_COMPLETE, such entries will not 502da14cebeSEric Cheng * be returned; instead, we return the IF_RESOLVER ire. 503da14cebeSEric Cheng */ 504da14cebeSEric Cheng 505da14cebeSEric Cheng if (ire->ire_ipif == NULL) { 506da14cebeSEric Cheng tmp_ire = ire; 507da14cebeSEric Cheng /* 508da14cebeSEric Cheng * Look to see if the nexthop entry is in the 509da14cebeSEric Cheng * cachetable (I am inlining a simpler ire_cache_lookup 510da14cebeSEric Cheng * here). 511da14cebeSEric Cheng */ 512da14cebeSEric Cheng ire = ire_cache_lookup_simple(ire->ire_gateway_addr, ipst); 513da14cebeSEric Cheng if (ire == NULL) { 514da14cebeSEric Cheng /* Try ire_route_lookup */ 515da14cebeSEric Cheng ire = tmp_ire; 516da14cebeSEric Cheng } else { 517da14cebeSEric Cheng goto solved; 518da14cebeSEric Cheng } 519da14cebeSEric Cheng } 520da14cebeSEric Cheng if (ire->ire_ipif != NULL) 521*e11c3f44Smeem match_flags |= MATCH_IRE_ILL; 522da14cebeSEric Cheng 523da14cebeSEric Cheng ire = ire_route_lookup(ire->ire_gateway_addr, 0, 524da14cebeSEric Cheng 0, 0, ire->ire_ipif, NULL, zoneid, NULL, match_flags, ipst); 525da14cebeSEric Cheng solved: 526da14cebeSEric Cheng DTRACE_PROBE2(ftable__route__lookup1, (ire_t *), ire, 527da14cebeSEric Cheng (ire_t *), save_ire); 528da14cebeSEric Cheng if (ire == NULL) { 529da14cebeSEric Cheng /* 530da14cebeSEric Cheng * Do not release the parent ire if MATCH_IRE_PARENT 531da14cebeSEric Cheng * is set. Also return it via ire. 532da14cebeSEric Cheng */ 533da14cebeSEric Cheng ire_refrele(save_ire); 534da14cebeSEric Cheng *pire = NULL; 535da14cebeSEric Cheng return (ire); 536da14cebeSEric Cheng } 537da14cebeSEric Cheng if (ire->ire_type & (IRE_CACHETABLE | IRE_INTERFACE)) { 538da14cebeSEric Cheng /* 539da14cebeSEric Cheng * If the caller did not ask for pire, release 540da14cebeSEric Cheng * it now. 541da14cebeSEric Cheng */ 542da14cebeSEric Cheng if (pire == NULL) { 543da14cebeSEric Cheng ire_refrele(save_ire); 544da14cebeSEric Cheng } 545da14cebeSEric Cheng } 546da14cebeSEric Cheng return (ire); 547da14cebeSEric Cheng } 548c793af95Ssangeeta 549c793af95Ssangeeta /* 550c793af95Ssangeeta * Find an IRE_OFFSUBNET IRE entry for the multicast address 'group' 551c793af95Ssangeeta * that goes through 'ipif'. As a fallback, a route that goes through 552c793af95Ssangeeta * ipif->ipif_ill can be returned. 553c793af95Ssangeeta */ 554c793af95Ssangeeta ire_t * 555c793af95Ssangeeta ipif_lookup_multi_ire(ipif_t *ipif, ipaddr_t group) 556c793af95Ssangeeta { 557c793af95Ssangeeta ire_t *ire; 558c793af95Ssangeeta ire_t *save_ire = NULL; 559c793af95Ssangeeta ire_t *gw_ire; 560c793af95Ssangeeta irb_t *irb; 561c793af95Ssangeeta ipaddr_t gw_addr; 562c793af95Ssangeeta int match_flags = MATCH_IRE_TYPE | MATCH_IRE_ILL; 563f4b3ec61Sdh155122 ip_stack_t *ipst = ipif->ipif_ill->ill_ipst; 564c793af95Ssangeeta 565c793af95Ssangeeta ASSERT(CLASSD(group)); 566c793af95Ssangeeta 567c793af95Ssangeeta ire = ire_ftable_lookup(group, 0, 0, 0, NULL, NULL, ALL_ZONES, 0, 568f4b3ec61Sdh155122 NULL, MATCH_IRE_DEFAULT, ipst); 569c793af95Ssangeeta 570c793af95Ssangeeta if (ire == NULL) 571c793af95Ssangeeta return (NULL); 572c793af95Ssangeeta 573c793af95Ssangeeta irb = ire->ire_bucket; 574c793af95Ssangeeta ASSERT(irb); 575c793af95Ssangeeta 576c793af95Ssangeeta IRB_REFHOLD(irb); 577c793af95Ssangeeta ire_refrele(ire); 578c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 579c793af95Ssangeeta if (ire->ire_addr != group || 580c793af95Ssangeeta ipif->ipif_zoneid != ire->ire_zoneid && 581c793af95Ssangeeta ire->ire_zoneid != ALL_ZONES) { 582c793af95Ssangeeta continue; 583c793af95Ssangeeta } 584c793af95Ssangeeta 585c793af95Ssangeeta switch (ire->ire_type) { 586c793af95Ssangeeta case IRE_DEFAULT: 587c793af95Ssangeeta case IRE_PREFIX: 588c793af95Ssangeeta case IRE_HOST: 589c793af95Ssangeeta gw_addr = ire->ire_gateway_addr; 590c793af95Ssangeeta gw_ire = ire_ftable_lookup(gw_addr, 0, 0, IRE_INTERFACE, 591f4b3ec61Sdh155122 ipif, NULL, ALL_ZONES, 0, NULL, match_flags, ipst); 592c793af95Ssangeeta 593c793af95Ssangeeta if (gw_ire != NULL) { 594c793af95Ssangeeta if (save_ire != NULL) { 595c793af95Ssangeeta ire_refrele(save_ire); 596c793af95Ssangeeta } 597c793af95Ssangeeta IRE_REFHOLD(ire); 598c793af95Ssangeeta if (gw_ire->ire_ipif == ipif) { 599c793af95Ssangeeta ire_refrele(gw_ire); 600c793af95Ssangeeta 601c793af95Ssangeeta IRB_REFRELE(irb); 602c793af95Ssangeeta return (ire); 603c793af95Ssangeeta } 604c793af95Ssangeeta ire_refrele(gw_ire); 605c793af95Ssangeeta save_ire = ire; 606c793af95Ssangeeta } 607c793af95Ssangeeta break; 608c793af95Ssangeeta case IRE_IF_NORESOLVER: 609c793af95Ssangeeta case IRE_IF_RESOLVER: 610c793af95Ssangeeta if (ire->ire_ipif == ipif) { 611c793af95Ssangeeta if (save_ire != NULL) { 612c793af95Ssangeeta ire_refrele(save_ire); 613c793af95Ssangeeta } 614c793af95Ssangeeta IRE_REFHOLD(ire); 615c793af95Ssangeeta 616c793af95Ssangeeta IRB_REFRELE(irb); 617c793af95Ssangeeta return (ire); 618c793af95Ssangeeta } 619c793af95Ssangeeta break; 620c793af95Ssangeeta } 621c793af95Ssangeeta } 622c793af95Ssangeeta IRB_REFRELE(irb); 623c793af95Ssangeeta 624c793af95Ssangeeta return (save_ire); 625c793af95Ssangeeta } 626c793af95Ssangeeta 627c793af95Ssangeeta /* 628c793af95Ssangeeta * Find an IRE_INTERFACE for the multicast group. 629c793af95Ssangeeta * Allows different routes for multicast addresses 630c793af95Ssangeeta * in the unicast routing table (akin to 224.0.0.0 but could be more specific) 631c793af95Ssangeeta * which point at different interfaces. This is used when IP_MULTICAST_IF 632c793af95Ssangeeta * isn't specified (when sending) and when IP_ADD_MEMBERSHIP doesn't 633c793af95Ssangeeta * specify the interface to join on. 634c793af95Ssangeeta * 635c793af95Ssangeeta * Supports IP_BOUND_IF by following the ipif/ill when recursing. 636c793af95Ssangeeta */ 637c793af95Ssangeeta ire_t * 638f4b3ec61Sdh155122 ire_lookup_multi(ipaddr_t group, zoneid_t zoneid, ip_stack_t *ipst) 639c793af95Ssangeeta { 640c793af95Ssangeeta ire_t *ire; 641c793af95Ssangeeta ipif_t *ipif = NULL; 642c793af95Ssangeeta int match_flags = MATCH_IRE_TYPE; 643c793af95Ssangeeta ipaddr_t gw_addr; 644c793af95Ssangeeta 645c793af95Ssangeeta ire = ire_ftable_lookup(group, 0, 0, 0, NULL, NULL, zoneid, 646f4b3ec61Sdh155122 0, NULL, MATCH_IRE_DEFAULT, ipst); 647c793af95Ssangeeta 648c793af95Ssangeeta /* We search a resolvable ire in case of multirouting. */ 649c793af95Ssangeeta if ((ire != NULL) && (ire->ire_flags & RTF_MULTIRT)) { 650c793af95Ssangeeta ire_t *cire = NULL; 651c793af95Ssangeeta /* 652c793af95Ssangeeta * If the route is not resolvable, the looked up ire 653c793af95Ssangeeta * may be changed here. In that case, ire_multirt_lookup() 654c793af95Ssangeeta * IRE_REFRELE the original ire and change it. 655c793af95Ssangeeta */ 656f4b3ec61Sdh155122 (void) ire_multirt_lookup(&cire, &ire, MULTIRT_CACHEGW, 657f4b3ec61Sdh155122 NULL, ipst); 658c793af95Ssangeeta if (cire != NULL) 659c793af95Ssangeeta ire_refrele(cire); 660c793af95Ssangeeta } 661c793af95Ssangeeta if (ire == NULL) 662c793af95Ssangeeta return (NULL); 663c793af95Ssangeeta /* 664c793af95Ssangeeta * Make sure we follow ire_ipif. 665c793af95Ssangeeta * 666c793af95Ssangeeta * We need to determine the interface route through 667*e11c3f44Smeem * which the gateway will be reached. 668c793af95Ssangeeta */ 669c793af95Ssangeeta if (ire->ire_ipif != NULL) { 670c793af95Ssangeeta ipif = ire->ire_ipif; 671*e11c3f44Smeem match_flags |= MATCH_IRE_ILL; 672c793af95Ssangeeta } 673c793af95Ssangeeta 674c793af95Ssangeeta switch (ire->ire_type) { 675c793af95Ssangeeta case IRE_DEFAULT: 676c793af95Ssangeeta case IRE_PREFIX: 677c793af95Ssangeeta case IRE_HOST: 678c793af95Ssangeeta gw_addr = ire->ire_gateway_addr; 679c793af95Ssangeeta ire_refrele(ire); 680c793af95Ssangeeta ire = ire_ftable_lookup(gw_addr, 0, 0, 681c793af95Ssangeeta IRE_INTERFACE, ipif, NULL, zoneid, 0, 682f4b3ec61Sdh155122 NULL, match_flags, ipst); 683c793af95Ssangeeta return (ire); 684c793af95Ssangeeta case IRE_IF_NORESOLVER: 685c793af95Ssangeeta case IRE_IF_RESOLVER: 686c793af95Ssangeeta return (ire); 687c793af95Ssangeeta default: 688c793af95Ssangeeta ire_refrele(ire); 689c793af95Ssangeeta return (NULL); 690c793af95Ssangeeta } 691c793af95Ssangeeta } 692c793af95Ssangeeta 693c793af95Ssangeeta /* 694c793af95Ssangeeta * Delete the passed in ire if the gateway addr matches 695c793af95Ssangeeta */ 696c793af95Ssangeeta void 697c793af95Ssangeeta ire_del_host_redir(ire_t *ire, char *gateway) 698c793af95Ssangeeta { 6996bdb8e66Sdd193516 if ((ire->ire_flags & RTF_DYNAMIC) && 700c793af95Ssangeeta (ire->ire_gateway_addr == *(ipaddr_t *)gateway)) 701c793af95Ssangeeta ire_delete(ire); 702c793af95Ssangeeta } 703c793af95Ssangeeta 704c793af95Ssangeeta /* 705c793af95Ssangeeta * Search for all HOST REDIRECT routes that are 706c793af95Ssangeeta * pointing at the specified gateway and 707c793af95Ssangeeta * delete them. This routine is called only 708c793af95Ssangeeta * when a default gateway is going away. 709c793af95Ssangeeta */ 710c793af95Ssangeeta void 711f4b3ec61Sdh155122 ire_delete_host_redirects(ipaddr_t gateway, ip_stack_t *ipst) 712c793af95Ssangeeta { 713c793af95Ssangeeta struct rtfuncarg rtfarg; 714c793af95Ssangeeta 715c793af95Ssangeeta (void) memset(&rtfarg, 0, sizeof (rtfarg)); 716c793af95Ssangeeta rtfarg.rt_func = ire_del_host_redir; 717c793af95Ssangeeta rtfarg.rt_arg = (void *)&gateway; 718f4b3ec61Sdh155122 (void) ipst->ips_ip_ftable->rnh_walktree_mt(ipst->ips_ip_ftable, 719f4b3ec61Sdh155122 rtfunc, &rtfarg, irb_refhold_rn, irb_refrele_rn); 720c793af95Ssangeeta } 721c793af95Ssangeeta 722c793af95Ssangeeta struct ihandle_arg { 723c793af95Ssangeeta uint32_t ihandle; 724c793af95Ssangeeta ire_t *ire; 725c793af95Ssangeeta }; 726c793af95Ssangeeta 727c793af95Ssangeeta static int 728c793af95Ssangeeta ire_ihandle_onlink_match(struct radix_node *rn, void *arg) 729c793af95Ssangeeta { 730c793af95Ssangeeta struct rt_entry *rt; 731c793af95Ssangeeta irb_t *irb; 732c793af95Ssangeeta ire_t *ire; 733c793af95Ssangeeta struct ihandle_arg *ih = arg; 734c793af95Ssangeeta 735c793af95Ssangeeta rt = (struct rt_entry *)rn; 736c793af95Ssangeeta ASSERT(rt != NULL); 737c793af95Ssangeeta irb = &rt->rt_irb; 738c793af95Ssangeeta for (ire = irb->irb_ire; ire != NULL; ire = ire->ire_next) { 739c793af95Ssangeeta if ((ire->ire_type & IRE_INTERFACE) && 740c793af95Ssangeeta (ire->ire_ihandle == ih->ihandle)) { 741c793af95Ssangeeta ih->ire = ire; 742c793af95Ssangeeta IRE_REFHOLD(ire); 743c793af95Ssangeeta return (1); 744c793af95Ssangeeta } 745c793af95Ssangeeta } 746c793af95Ssangeeta return (0); 747c793af95Ssangeeta } 748c793af95Ssangeeta 749c793af95Ssangeeta /* 750c793af95Ssangeeta * Locate the interface ire that is tied to the cache ire 'cire' via 751c793af95Ssangeeta * cire->ire_ihandle. 752c793af95Ssangeeta * 753c793af95Ssangeeta * We are trying to create the cache ire for an onlink destn. or 754c793af95Ssangeeta * gateway in 'cire'. We are called from ire_add_v4() in the IRE_IF_RESOLVER 755c793af95Ssangeeta * case, after the ire has come back from ARP. 756c793af95Ssangeeta */ 757c793af95Ssangeeta ire_t * 758c793af95Ssangeeta ire_ihandle_lookup_onlink(ire_t *cire) 759c793af95Ssangeeta { 760c793af95Ssangeeta ire_t *ire; 761c793af95Ssangeeta int match_flags; 762c793af95Ssangeeta struct ihandle_arg ih; 763f4b3ec61Sdh155122 ip_stack_t *ipst; 764c793af95Ssangeeta 765c793af95Ssangeeta ASSERT(cire != NULL); 766f4b3ec61Sdh155122 ipst = cire->ire_ipst; 767c793af95Ssangeeta 768c793af95Ssangeeta /* 769c793af95Ssangeeta * We don't need to specify the zoneid to ire_ftable_lookup() below 770c793af95Ssangeeta * because the ihandle refers to an ipif which can be in only one zone. 771c793af95Ssangeeta */ 772c793af95Ssangeeta match_flags = MATCH_IRE_TYPE | MATCH_IRE_IHANDLE | MATCH_IRE_MASK; 773c793af95Ssangeeta /* 774c793af95Ssangeeta * We know that the mask of the interface ire equals cire->ire_cmask. 775c793af95Ssangeeta * (When ip_newroute() created 'cire' for an on-link destn. it set its 776c793af95Ssangeeta * cmask from the interface ire's mask) 777c793af95Ssangeeta */ 778c793af95Ssangeeta ire = ire_ftable_lookup(cire->ire_addr, cire->ire_cmask, 0, 779c793af95Ssangeeta IRE_INTERFACE, NULL, NULL, ALL_ZONES, cire->ire_ihandle, 780f4b3ec61Sdh155122 NULL, match_flags, ipst); 781c793af95Ssangeeta if (ire != NULL) 782c793af95Ssangeeta return (ire); 783c793af95Ssangeeta /* 784c793af95Ssangeeta * If we didn't find an interface ire above, we can't declare failure. 785c793af95Ssangeeta * For backwards compatibility, we need to support prefix routes 786c793af95Ssangeeta * pointing to next hop gateways that are not on-link. 787c793af95Ssangeeta * 788c793af95Ssangeeta * In the resolver/noresolver case, ip_newroute() thinks it is creating 789c793af95Ssangeeta * the cache ire for an onlink destination in 'cire'. But 'cire' is 790c793af95Ssangeeta * not actually onlink, because ire_ftable_lookup() cheated it, by 791c793af95Ssangeeta * doing ire_route_lookup() twice and returning an interface ire. 792c793af95Ssangeeta * 793c793af95Ssangeeta * Eg. default - gw1 (line 1) 794c793af95Ssangeeta * gw1 - gw2 (line 2) 795c793af95Ssangeeta * gw2 - hme0 (line 3) 796c793af95Ssangeeta * 797c793af95Ssangeeta * In the above example, ip_newroute() tried to create the cache ire 798c793af95Ssangeeta * 'cire' for gw1, based on the interface route in line 3. The 799c793af95Ssangeeta * ire_ftable_lookup() above fails, because there is no interface route 800c793af95Ssangeeta * to reach gw1. (it is gw2). We fall thru below. 801c793af95Ssangeeta * 802c793af95Ssangeeta * Do a brute force search based on the ihandle in a subset of the 803c793af95Ssangeeta * forwarding tables, corresponding to cire->ire_cmask. Otherwise 804c793af95Ssangeeta * things become very complex, since we don't have 'pire' in this 805c793af95Ssangeeta * case. (Also note that this method is not possible in the offlink 806c793af95Ssangeeta * case because we don't know the mask) 807c793af95Ssangeeta */ 808c793af95Ssangeeta (void) memset(&ih, 0, sizeof (ih)); 809c793af95Ssangeeta ih.ihandle = cire->ire_ihandle; 810f4b3ec61Sdh155122 (void) ipst->ips_ip_ftable->rnh_walktree_mt(ipst->ips_ip_ftable, 811f4b3ec61Sdh155122 ire_ihandle_onlink_match, &ih, irb_refhold_rn, irb_refrele_rn); 812c793af95Ssangeeta return (ih.ire); 813c793af95Ssangeeta } 814c793af95Ssangeeta 815c793af95Ssangeeta /* 816c793af95Ssangeeta * IRE iterator used by ire_ftable_lookup[_v6]() to process multiple default 817c793af95Ssangeeta * routes. Given a starting point in the hash list (ire_origin), walk the IREs 818c793af95Ssangeeta * in the bucket skipping default interface routes and deleted entries. 819c793af95Ssangeeta * Returns the next IRE (unheld), or NULL when we're back to the starting point. 820c793af95Ssangeeta * Assumes that the caller holds a reference on the IRE bucket. 821c793af95Ssangeeta */ 822c793af95Ssangeeta ire_t * 823c793af95Ssangeeta ire_get_next_default_ire(ire_t *ire, ire_t *ire_origin) 824c793af95Ssangeeta { 825c793af95Ssangeeta ASSERT(ire_origin->ire_bucket != NULL); 826c793af95Ssangeeta ASSERT(ire != NULL); 827c793af95Ssangeeta 828c793af95Ssangeeta do { 829c793af95Ssangeeta ire = ire->ire_next; 830c793af95Ssangeeta if (ire == NULL) 831c793af95Ssangeeta ire = ire_origin->ire_bucket->irb_ire; 832c793af95Ssangeeta if (ire == ire_origin) 833c793af95Ssangeeta return (NULL); 834c793af95Ssangeeta } while ((ire->ire_type & IRE_INTERFACE) || 835c793af95Ssangeeta (ire->ire_marks & IRE_MARK_CONDEMNED)); 836c793af95Ssangeeta ASSERT(ire != NULL); 837c793af95Ssangeeta return (ire); 838c793af95Ssangeeta } 839c793af95Ssangeeta 840c793af95Ssangeeta static ipif_t * 841*e11c3f44Smeem ire_forward_src_ipif(ipaddr_t dst, ire_t *sire, ire_t *ire, 842c793af95Ssangeeta int zoneid, ushort_t *marks) 843c793af95Ssangeeta { 844c793af95Ssangeeta ipif_t *src_ipif; 845*e11c3f44Smeem ill_t *ill = ire->ire_ipif->ipif_ill; 846*e11c3f44Smeem ip_stack_t *ipst = ill->ill_ipst; 847c793af95Ssangeeta 848c793af95Ssangeeta /* 849*e11c3f44Smeem * Pick the best source address from ill. 850c793af95Ssangeeta * 851*e11c3f44Smeem * 1) Try to pick the source address from the destination 852c793af95Ssangeeta * route. Clustering assumes that when we have multiple 853c793af95Ssangeeta * prefixes hosted on an interface, the prefix of the 854c793af95Ssangeeta * source address matches the prefix of the destination 855c793af95Ssangeeta * route. We do this only if the address is not 856c793af95Ssangeeta * DEPRECATED. 857c793af95Ssangeeta * 858*e11c3f44Smeem * 2) If the conn is in a different zone than the ire, we 859c793af95Ssangeeta * need to pick a source address from the right zone. 860c793af95Ssangeeta */ 861c793af95Ssangeeta if ((sire != NULL) && (sire->ire_flags & RTF_SETSRC)) { 862c793af95Ssangeeta /* 863c793af95Ssangeeta * The RTF_SETSRC flag is set in the parent ire (sire). 864c793af95Ssangeeta * Check that the ipif matching the requested source 865c793af95Ssangeeta * address still exists. 866c793af95Ssangeeta */ 867c793af95Ssangeeta src_ipif = ipif_lookup_addr(sire->ire_src_addr, NULL, 868f4b3ec61Sdh155122 zoneid, NULL, NULL, NULL, NULL, ipst); 869c793af95Ssangeeta return (src_ipif); 870c793af95Ssangeeta } 871c793af95Ssangeeta *marks |= IRE_MARK_USESRC_CHECK; 872*e11c3f44Smeem if (IS_IPMP(ill) || 873c793af95Ssangeeta (ire->ire_ipif->ipif_flags & IPIF_DEPRECATED) || 874*e11c3f44Smeem (ill->ill_usesrc_ifindex != 0)) { 875*e11c3f44Smeem src_ipif = ipif_select_source(ill, dst, zoneid); 876c793af95Ssangeeta } else { 877c793af95Ssangeeta src_ipif = ire->ire_ipif; 878c793af95Ssangeeta ASSERT(src_ipif != NULL); 879c793af95Ssangeeta /* hold src_ipif for uniformity */ 880c793af95Ssangeeta ipif_refhold(src_ipif); 881c793af95Ssangeeta } 882c793af95Ssangeeta return (src_ipif); 883c793af95Ssangeeta } 884c793af95Ssangeeta 885c793af95Ssangeeta /* 886c793af95Ssangeeta * This function is called by ip_rput_noire() and ip_fast_forward() 887c793af95Ssangeeta * to resolve the route of incoming packet that needs to be forwarded. 888c793af95Ssangeeta * If the ire of the nexthop is not already in the cachetable, this 889c793af95Ssangeeta * routine will insert it to the table, but won't trigger ARP resolution yet. 890c793af95Ssangeeta * Thus unlike ip_newroute, this function adds incomplete ires to 891c793af95Ssangeeta * the cachetable. ARP resolution for these ires are delayed until 892c793af95Ssangeeta * after all of the packet processing is completed and its ready to 893c793af95Ssangeeta * be sent out on the wire, Eventually, the packet transmit routine 894c793af95Ssangeeta * ip_xmit_v4() attempts to send a packet to the driver. If it finds 895c793af95Ssangeeta * that there is no link layer information, it will do the arp 896c793af95Ssangeeta * resolution and queue the packet in ire->ire_nce->nce_qd_mp and 897c793af95Ssangeeta * then send it out once the arp resolution is over 898c793af95Ssangeeta * (see ip_xmit_v4()->ire_arpresolve()). This scheme is similar to 899c793af95Ssangeeta * the model of BSD/SunOS 4 900c793af95Ssangeeta * 901c793af95Ssangeeta * In future, the insertion of incomplete ires in the cachetable should 902c793af95Ssangeeta * be implemented in hostpath as well, as doing so will greatly reduce 903c793af95Ssangeeta * the existing complexity for code paths that depend on the context of 904c793af95Ssangeeta * the sender (such as IPsec). 905c793af95Ssangeeta * 906c793af95Ssangeeta * Thus this scheme of adding incomplete ires in cachetable in forwarding 907c793af95Ssangeeta * path can be used as a template for simplifying the hostpath. 908c793af95Ssangeeta */ 909c793af95Ssangeeta 910c793af95Ssangeeta ire_t * 91142ee8d71Sja97890 ire_forward(ipaddr_t dst, enum ire_forward_action *ret_action, 91242ee8d71Sja97890 ire_t *supplied_ire, ire_t *supplied_sire, const struct ts_label_s *tsl, 91342ee8d71Sja97890 ip_stack_t *ipst) 914c793af95Ssangeeta { 915c793af95Ssangeeta ipaddr_t gw = 0; 916c793af95Ssangeeta ire_t *ire = NULL; 917c793af95Ssangeeta ire_t *sire = NULL, *save_ire; 918c793af95Ssangeeta ill_t *dst_ill = NULL; 919c793af95Ssangeeta int error; 920c793af95Ssangeeta zoneid_t zoneid; 921c793af95Ssangeeta ipif_t *src_ipif = NULL; 922c793af95Ssangeeta mblk_t *res_mp; 923c793af95Ssangeeta ushort_t ire_marks = 0; 924c793af95Ssangeeta tsol_gcgrp_t *gcgrp = NULL; 925c793af95Ssangeeta tsol_gcgrp_addr_t ga; 926c793af95Ssangeeta 927c793af95Ssangeeta zoneid = GLOBAL_ZONEID; 928c793af95Ssangeeta 929c793af95Ssangeeta if (supplied_ire != NULL) { 930c793af95Ssangeeta /* We have arrived here from ipfil_sendpkt */ 931c793af95Ssangeeta ire = supplied_ire; 932c793af95Ssangeeta sire = supplied_sire; 933c793af95Ssangeeta goto create_irecache; 934c793af95Ssangeeta } 935c793af95Ssangeeta 936c793af95Ssangeeta ire = ire_ftable_lookup(dst, 0, 0, 0, NULL, &sire, zoneid, 0, 937c793af95Ssangeeta tsl, MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | 938f4b3ec61Sdh155122 MATCH_IRE_RJ_BHOLE | MATCH_IRE_PARENT|MATCH_IRE_SECATTR, ipst); 939c793af95Ssangeeta 940c793af95Ssangeeta if (ire == NULL) { 941f4b3ec61Sdh155122 ip_rts_change(RTM_MISS, dst, 0, 0, 0, 0, 0, 0, RTA_DST, ipst); 942c793af95Ssangeeta goto icmp_err_ret; 943c793af95Ssangeeta } 944c793af95Ssangeeta 945c793af95Ssangeeta /* 946c793af95Ssangeeta * If we encounter CGTP, we should have the caller use 947c793af95Ssangeeta * ip_newroute to resolve multirt instead of this function. 948c793af95Ssangeeta * CGTP specs explicitly state that it can't be used with routers. 949c793af95Ssangeeta * This essentially prevents insertion of incomplete RTF_MULTIRT 950c793af95Ssangeeta * ires in cachetable. 951c793af95Ssangeeta */ 952655a42e2Snordmark if (ipst->ips_ip_cgtp_filter && 953c793af95Ssangeeta ((ire->ire_flags & RTF_MULTIRT) || 954c793af95Ssangeeta ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)))) { 955c793af95Ssangeeta ip3dbg(("ire_forward: packet is to be multirouted- " 956c793af95Ssangeeta "handing it to ip_newroute\n")); 957c793af95Ssangeeta if (sire != NULL) 958c793af95Ssangeeta ire_refrele(sire); 959c793af95Ssangeeta ire_refrele(ire); 960c793af95Ssangeeta /* 961c793af95Ssangeeta * Inform caller about encountering of multirt so that 962c793af95Ssangeeta * ip_newroute() can be called. 963c793af95Ssangeeta */ 96442ee8d71Sja97890 *ret_action = Forward_check_multirt; 965c793af95Ssangeeta return (NULL); 966c793af95Ssangeeta } 967c793af95Ssangeeta 968c793af95Ssangeeta /* 969c793af95Ssangeeta * Verify that the returned IRE does not have either 970c793af95Ssangeeta * the RTF_REJECT or RTF_BLACKHOLE flags set and that the IRE is 971c793af95Ssangeeta * either an IRE_CACHE, IRE_IF_NORESOLVER or IRE_IF_RESOLVER. 972c793af95Ssangeeta */ 973c793af95Ssangeeta if ((ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) || 974c793af95Ssangeeta (ire->ire_type & (IRE_CACHE | IRE_INTERFACE)) == 0) { 975c793af95Ssangeeta ip3dbg(("ire 0x%p is not cache/resolver/noresolver\n", 976c793af95Ssangeeta (void *)ire)); 977c793af95Ssangeeta goto icmp_err_ret; 978c793af95Ssangeeta } 979c793af95Ssangeeta 980c793af95Ssangeeta /* 981c793af95Ssangeeta * If we already have a fully resolved IRE CACHE of the 982c793af95Ssangeeta * nexthop router, just hand over the cache entry 983c793af95Ssangeeta * and we are done. 984c793af95Ssangeeta */ 985c793af95Ssangeeta 986c793af95Ssangeeta if (ire->ire_type & IRE_CACHE) { 987c793af95Ssangeeta 988c793af95Ssangeeta /* 989c793af95Ssangeeta * If we are using this ire cache entry as a 990c793af95Ssangeeta * gateway to forward packets, chances are we 991c793af95Ssangeeta * will be using it again. So turn off 992c793af95Ssangeeta * the temporary flag, thus reducing its 993c793af95Ssangeeta * chances of getting deleted frequently. 994c793af95Ssangeeta */ 995c793af95Ssangeeta if (ire->ire_marks & IRE_MARK_TEMPORARY) { 996c793af95Ssangeeta irb_t *irb = ire->ire_bucket; 997c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 9989a09d68dSja97890 /* 9999a09d68dSja97890 * We need to recheck for IRE_MARK_TEMPORARY after 10009a09d68dSja97890 * acquiring the lock in order to guarantee 10019a09d68dSja97890 * irb_tmp_ire_cnt 10029a09d68dSja97890 */ 10039a09d68dSja97890 if (ire->ire_marks & IRE_MARK_TEMPORARY) { 1004c793af95Ssangeeta ire->ire_marks &= ~IRE_MARK_TEMPORARY; 1005c793af95Ssangeeta irb->irb_tmp_ire_cnt--; 10069a09d68dSja97890 } 1007c793af95Ssangeeta rw_exit(&irb->irb_lock); 1008c793af95Ssangeeta } 1009c793af95Ssangeeta 1010c793af95Ssangeeta if (sire != NULL) { 1011c793af95Ssangeeta UPDATE_OB_PKT_COUNT(sire); 1012c793af95Ssangeeta sire->ire_last_used_time = lbolt; 1013c793af95Ssangeeta ire_refrele(sire); 1014c793af95Ssangeeta } 10159689d5ffSja97890 *ret_action = Forward_ok; 1016c793af95Ssangeeta return (ire); 1017c793af95Ssangeeta } 1018c793af95Ssangeeta create_irecache: 1019c793af95Ssangeeta /* 1020c793af95Ssangeeta * Increment the ire_ob_pkt_count field for ire if it is an 1021c793af95Ssangeeta * INTERFACE (IF_RESOLVER or IF_NORESOLVER) IRE type, and 1022c793af95Ssangeeta * increment the same for the parent IRE, sire, if it is some 102327c48ed9Snordmark * sort of prefix IRE (which includes DEFAULT, PREFIX, and HOST). 1024c793af95Ssangeeta */ 1025c793af95Ssangeeta if ((ire->ire_type & IRE_INTERFACE) != 0) { 1026c793af95Ssangeeta UPDATE_OB_PKT_COUNT(ire); 1027c793af95Ssangeeta ire->ire_last_used_time = lbolt; 1028c793af95Ssangeeta } 1029c793af95Ssangeeta 1030c793af95Ssangeeta /* 1031c793af95Ssangeeta * sire must be either IRE_CACHETABLE OR IRE_INTERFACE type 1032c793af95Ssangeeta */ 1033c793af95Ssangeeta if (sire != NULL) { 1034c793af95Ssangeeta gw = sire->ire_gateway_addr; 1035c793af95Ssangeeta ASSERT((sire->ire_type & 1036c793af95Ssangeeta (IRE_CACHETABLE | IRE_INTERFACE)) == 0); 1037c793af95Ssangeeta UPDATE_OB_PKT_COUNT(sire); 1038c793af95Ssangeeta sire->ire_last_used_time = lbolt; 1039c793af95Ssangeeta } 1040c793af95Ssangeeta 1041*e11c3f44Smeem dst_ill = ire->ire_ipif->ipif_ill; 1042*e11c3f44Smeem if (IS_IPMP(dst_ill)) 1043*e11c3f44Smeem dst_ill = ipmp_illgrp_hold_next_ill(dst_ill->ill_grp); 1044*e11c3f44Smeem else 1045*e11c3f44Smeem ill_refhold(dst_ill); 1046*e11c3f44Smeem 1047c793af95Ssangeeta if (dst_ill == NULL) { 1048*e11c3f44Smeem ip2dbg(("ire_forward no dst ill; ire 0x%p\n", (void *)ire)); 1049c793af95Ssangeeta goto icmp_err_ret; 1050c793af95Ssangeeta } 1051c793af95Ssangeeta 1052c793af95Ssangeeta ASSERT(src_ipif == NULL); 1053c793af95Ssangeeta /* Now obtain the src_ipif */ 1054*e11c3f44Smeem src_ipif = ire_forward_src_ipif(dst, sire, ire, zoneid, &ire_marks); 1055c793af95Ssangeeta if (src_ipif == NULL) 1056c793af95Ssangeeta goto icmp_err_ret; 1057c793af95Ssangeeta 1058c793af95Ssangeeta switch (ire->ire_type) { 1059c793af95Ssangeeta case IRE_IF_NORESOLVER: 1060c793af95Ssangeeta /* create ire_cache for ire_addr endpoint */ 106142ee8d71Sja97890 if (dst_ill->ill_phys_addr_length != IP_ADDR_LEN && 106242ee8d71Sja97890 dst_ill->ill_resolver_mp == NULL) { 106342ee8d71Sja97890 ip1dbg(("ire_forward: dst_ill %p " 106442ee8d71Sja97890 "for IRE_IF_NORESOLVER ire %p has " 106542ee8d71Sja97890 "no ill_resolver_mp\n", 106642ee8d71Sja97890 (void *)dst_ill, (void *)ire)); 106742ee8d71Sja97890 goto icmp_err_ret; 106842ee8d71Sja97890 } 106942ee8d71Sja97890 /* FALLTHRU */ 1070c793af95Ssangeeta case IRE_IF_RESOLVER: 1071c793af95Ssangeeta /* 1072c793af95Ssangeeta * We have the IRE_IF_RESOLVER of the nexthop gateway 1073c793af95Ssangeeta * and now need to build a IRE_CACHE for it. 1074c793af95Ssangeeta * In this case, we have the following : 1075c793af95Ssangeeta * 1076c793af95Ssangeeta * 1) src_ipif - used for getting a source address. 1077c793af95Ssangeeta * 1078c793af95Ssangeeta * 2) dst_ill - from which we derive ire_stq/ire_rfq. This 1079c793af95Ssangeeta * means packets using the IRE_CACHE that we will build 1080c793af95Ssangeeta * here will go out on dst_ill. 1081c793af95Ssangeeta * 1082c793af95Ssangeeta * 3) sire may or may not be NULL. But, the IRE_CACHE that is 1083c793af95Ssangeeta * to be created will only be tied to the IRE_INTERFACE 1084c793af95Ssangeeta * that was derived from the ire_ihandle field. 1085c793af95Ssangeeta * 1086c793af95Ssangeeta * If sire is non-NULL, it means the destination is 1087c793af95Ssangeeta * off-link and we will first create the IRE_CACHE for the 1088c793af95Ssangeeta * gateway. 1089c793af95Ssangeeta */ 1090c793af95Ssangeeta res_mp = dst_ill->ill_resolver_mp; 1091c793af95Ssangeeta if (ire->ire_type == IRE_IF_RESOLVER && 1092c793af95Ssangeeta (!OK_RESOLVER_MP(res_mp))) { 109342ee8d71Sja97890 goto icmp_err_ret; 1094c793af95Ssangeeta } 1095c793af95Ssangeeta /* 1096c793af95Ssangeeta * To be at this point in the code with a non-zero gw 1097c793af95Ssangeeta * means that dst is reachable through a gateway that 1098c793af95Ssangeeta * we have never resolved. By changing dst to the gw 1099c793af95Ssangeeta * addr we resolve the gateway first. 1100c793af95Ssangeeta */ 1101c793af95Ssangeeta if (gw != INADDR_ANY) { 1102c793af95Ssangeeta /* 1103c793af95Ssangeeta * The source ipif that was determined above was 1104c793af95Ssangeeta * relative to the destination address, not the 1105c793af95Ssangeeta * gateway's. If src_ipif was not taken out of 1106c793af95Ssangeeta * the IRE_IF_RESOLVER entry, we'll need to call 1107c793af95Ssangeeta * ipif_select_source() again. 1108c793af95Ssangeeta */ 1109c793af95Ssangeeta if (src_ipif != ire->ire_ipif) { 1110c793af95Ssangeeta ipif_refrele(src_ipif); 1111c793af95Ssangeeta src_ipif = ipif_select_source(dst_ill, 1112c793af95Ssangeeta gw, zoneid); 1113c793af95Ssangeeta if (src_ipif == NULL) 1114c793af95Ssangeeta goto icmp_err_ret; 1115c793af95Ssangeeta } 1116c793af95Ssangeeta dst = gw; 1117c793af95Ssangeeta gw = INADDR_ANY; 1118c793af95Ssangeeta } 1119c793af95Ssangeeta /* 1120c793af95Ssangeeta * dst has been set to the address of the nexthop. 1121c793af95Ssangeeta * 1122c793af95Ssangeeta * TSol note: get security attributes of the nexthop; 1123c793af95Ssangeeta * Note that the nexthop may either be a gateway, or the 1124c793af95Ssangeeta * packet destination itself; Detailed explanation of 1125c793af95Ssangeeta * issues involved is provided in the IRE_IF_NORESOLVER 1126c793af95Ssangeeta * logic in ip_newroute(). 1127c793af95Ssangeeta */ 1128c793af95Ssangeeta ga.ga_af = AF_INET; 1129c793af95Ssangeeta IN6_IPADDR_TO_V4MAPPED(dst, &ga.ga_addr); 1130c793af95Ssangeeta gcgrp = gcgrp_lookup(&ga, B_FALSE); 1131c793af95Ssangeeta 1132c793af95Ssangeeta if (ire->ire_type == IRE_IF_NORESOLVER) 1133c793af95Ssangeeta dst = ire->ire_addr; /* ire_cache for tunnel endpoint */ 1134c793af95Ssangeeta 1135c793af95Ssangeeta save_ire = ire; 1136c793af95Ssangeeta /* 113754da8755Ssowmini * create an incomplete IRE_CACHE. 113854da8755Ssowmini * An areq_mp will be generated in ire_arpresolve() for 113954da8755Ssowmini * RESOLVER interfaces. 1140c793af95Ssangeeta */ 1141c793af95Ssangeeta ire = ire_create( 1142c793af95Ssangeeta (uchar_t *)&dst, /* dest address */ 1143c793af95Ssangeeta (uchar_t *)&ip_g_all_ones, /* mask */ 1144c793af95Ssangeeta (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ 1145c793af95Ssangeeta (uchar_t *)&gw, /* gateway address */ 1146c793af95Ssangeeta (save_ire->ire_type == IRE_IF_RESOLVER ? NULL: 1147c793af95Ssangeeta &save_ire->ire_max_frag), 1148c793af95Ssangeeta NULL, 1149c793af95Ssangeeta dst_ill->ill_rq, /* recv-from queue */ 1150c793af95Ssangeeta dst_ill->ill_wq, /* send-to queue */ 1151c793af95Ssangeeta IRE_CACHE, /* IRE type */ 1152c793af95Ssangeeta src_ipif, 1153c793af95Ssangeeta ire->ire_mask, /* Parent mask */ 1154c793af95Ssangeeta 0, 1155c793af95Ssangeeta ire->ire_ihandle, /* Interface handle */ 1156c793af95Ssangeeta 0, 1157c793af95Ssangeeta &(ire->ire_uinfo), 1158c793af95Ssangeeta NULL, 1159f4b3ec61Sdh155122 gcgrp, 1160f4b3ec61Sdh155122 ipst); 1161c793af95Ssangeeta ip1dbg(("incomplete ire_cache 0x%p\n", (void *)ire)); 1162c793af95Ssangeeta if (ire != NULL) { 1163c793af95Ssangeeta gcgrp = NULL; /* reference now held by IRE */ 1164c793af95Ssangeeta ire->ire_marks |= ire_marks; 1165c793af95Ssangeeta /* add the incomplete ire: */ 1166c793af95Ssangeeta error = ire_add(&ire, NULL, NULL, NULL, B_TRUE); 1167c793af95Ssangeeta if (error == 0 && ire != NULL) { 1168c793af95Ssangeeta ire->ire_max_frag = save_ire->ire_max_frag; 1169c793af95Ssangeeta ip1dbg(("setting max_frag to %d in ire 0x%p\n", 1170c793af95Ssangeeta ire->ire_max_frag, (void *)ire)); 1171c793af95Ssangeeta } else { 1172c793af95Ssangeeta ire_refrele(save_ire); 1173c793af95Ssangeeta goto icmp_err_ret; 1174c793af95Ssangeeta } 1175c793af95Ssangeeta } else { 1176c793af95Ssangeeta if (gcgrp != NULL) { 1177c793af95Ssangeeta GCGRP_REFRELE(gcgrp); 1178c793af95Ssangeeta gcgrp = NULL; 1179c793af95Ssangeeta } 1180c793af95Ssangeeta } 1181c793af95Ssangeeta 1182c793af95Ssangeeta ire_refrele(save_ire); 1183c793af95Ssangeeta break; 1184c793af95Ssangeeta default: 1185c793af95Ssangeeta break; 1186c793af95Ssangeeta } 1187c793af95Ssangeeta 118842ee8d71Sja97890 *ret_action = Forward_ok; 1189c793af95Ssangeeta if (sire != NULL) 1190c793af95Ssangeeta ire_refrele(sire); 1191c793af95Ssangeeta if (dst_ill != NULL) 1192c793af95Ssangeeta ill_refrele(dst_ill); 1193c793af95Ssangeeta if (src_ipif != NULL) 1194c793af95Ssangeeta ipif_refrele(src_ipif); 1195c793af95Ssangeeta return (ire); 1196c793af95Ssangeeta icmp_err_ret: 119742ee8d71Sja97890 *ret_action = Forward_ret_icmp_err; 1198c793af95Ssangeeta if (sire != NULL) 1199c793af95Ssangeeta ire_refrele(sire); 120042ee8d71Sja97890 if (dst_ill != NULL) 120142ee8d71Sja97890 ill_refrele(dst_ill); 120242ee8d71Sja97890 if (src_ipif != NULL) 120342ee8d71Sja97890 ipif_refrele(src_ipif); 1204c793af95Ssangeeta if (ire != NULL) { 120542ee8d71Sja97890 if (ire->ire_flags & RTF_BLACKHOLE) 120642ee8d71Sja97890 *ret_action = Forward_blackhole; 1207c793af95Ssangeeta ire_refrele(ire); 1208c793af95Ssangeeta } 1209c793af95Ssangeeta return (NULL); 1210da14cebeSEric Cheng } 1211da14cebeSEric Cheng 1212da14cebeSEric Cheng /* 1213da14cebeSEric Cheng * Since caller is ip_fast_forward, there is no CGTP or Tsol test 1214da14cebeSEric Cheng * Also we dont call ftable lookup with MATCH_IRE_PARENT 1215da14cebeSEric Cheng */ 1216da14cebeSEric Cheng 1217da14cebeSEric Cheng ire_t * 1218da14cebeSEric Cheng ire_forward_simple(ipaddr_t dst, enum ire_forward_action *ret_action, 1219da14cebeSEric Cheng ip_stack_t *ipst) 1220da14cebeSEric Cheng { 1221da14cebeSEric Cheng ipaddr_t gw = 0; 1222da14cebeSEric Cheng ire_t *ire = NULL; 1223da14cebeSEric Cheng ire_t *sire = NULL, *save_ire; 1224da14cebeSEric Cheng ill_t *dst_ill = NULL; 1225da14cebeSEric Cheng int error; 1226*e11c3f44Smeem zoneid_t zoneid = GLOBAL_ZONEID; 1227da14cebeSEric Cheng ipif_t *src_ipif = NULL; 1228da14cebeSEric Cheng mblk_t *res_mp; 1229da14cebeSEric Cheng ushort_t ire_marks = 0; 1230da14cebeSEric Cheng 1231da14cebeSEric Cheng ire = ire_ftable_lookup_simple(dst, &sire, zoneid, 1232*e11c3f44Smeem MATCH_IRE_RECURSIVE | MATCH_IRE_DEFAULT | MATCH_IRE_RJ_BHOLE, ipst); 1233da14cebeSEric Cheng if (ire == NULL) { 1234da14cebeSEric Cheng ip_rts_change(RTM_MISS, dst, 0, 0, 0, 0, 0, 0, RTA_DST, ipst); 1235da14cebeSEric Cheng goto icmp_err_ret; 1236da14cebeSEric Cheng } 1237da14cebeSEric Cheng 1238da14cebeSEric Cheng /* 1239da14cebeSEric Cheng * Verify that the returned IRE does not have either 1240da14cebeSEric Cheng * the RTF_REJECT or RTF_BLACKHOLE flags set and that the IRE is 1241da14cebeSEric Cheng * either an IRE_CACHE, IRE_IF_NORESOLVER or IRE_IF_RESOLVER. 1242da14cebeSEric Cheng */ 1243da14cebeSEric Cheng if ((ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE))) { 1244da14cebeSEric Cheng ASSERT(ire->ire_type & (IRE_CACHE | IRE_INTERFACE)); 1245da14cebeSEric Cheng ip3dbg(("ire 0x%p is not cache/resolver/noresolver\n", 1246da14cebeSEric Cheng (void *)ire)); 1247da14cebeSEric Cheng goto icmp_err_ret; 1248da14cebeSEric Cheng } 1249da14cebeSEric Cheng 1250da14cebeSEric Cheng /* 1251da14cebeSEric Cheng * If we already have a fully resolved IRE CACHE of the 1252da14cebeSEric Cheng * nexthop router, just hand over the cache entry 1253da14cebeSEric Cheng * and we are done. 1254da14cebeSEric Cheng */ 1255da14cebeSEric Cheng if (ire->ire_type & IRE_CACHE) { 1256da14cebeSEric Cheng /* 1257da14cebeSEric Cheng * If we are using this ire cache entry as a 1258da14cebeSEric Cheng * gateway to forward packets, chances are we 1259da14cebeSEric Cheng * will be using it again. So turn off 1260da14cebeSEric Cheng * the temporary flag, thus reducing its 1261da14cebeSEric Cheng * chances of getting deleted frequently. 1262da14cebeSEric Cheng */ 1263da14cebeSEric Cheng if (ire->ire_marks & IRE_MARK_TEMPORARY) { 1264da14cebeSEric Cheng irb_t *irb = ire->ire_bucket; 1265da14cebeSEric Cheng rw_enter(&irb->irb_lock, RW_WRITER); 1266da14cebeSEric Cheng ire->ire_marks &= ~IRE_MARK_TEMPORARY; 1267da14cebeSEric Cheng irb->irb_tmp_ire_cnt--; 1268da14cebeSEric Cheng rw_exit(&irb->irb_lock); 1269da14cebeSEric Cheng } 1270da14cebeSEric Cheng 1271da14cebeSEric Cheng if (sire != NULL) { 1272da14cebeSEric Cheng UPDATE_OB_PKT_COUNT(sire); 1273da14cebeSEric Cheng ire_refrele(sire); 1274da14cebeSEric Cheng } 1275da14cebeSEric Cheng *ret_action = Forward_ok; 1276da14cebeSEric Cheng return (ire); 1277da14cebeSEric Cheng } 1278da14cebeSEric Cheng /* 1279da14cebeSEric Cheng * Increment the ire_ob_pkt_count field for ire if it is an 1280da14cebeSEric Cheng * INTERFACE (IF_RESOLVER or IF_NORESOLVER) IRE type, and 1281da14cebeSEric Cheng * increment the same for the parent IRE, sire, if it is some 1282da14cebeSEric Cheng * sort of prefix IRE (which includes DEFAULT, PREFIX, and HOST). 1283da14cebeSEric Cheng */ 1284da14cebeSEric Cheng if ((ire->ire_type & IRE_INTERFACE) != 0) { 1285da14cebeSEric Cheng UPDATE_OB_PKT_COUNT(ire); 1286da14cebeSEric Cheng ire->ire_last_used_time = lbolt; 1287da14cebeSEric Cheng } 1288da14cebeSEric Cheng 1289da14cebeSEric Cheng /* 1290da14cebeSEric Cheng * sire must be either IRE_CACHETABLE OR IRE_INTERFACE type 1291da14cebeSEric Cheng */ 1292da14cebeSEric Cheng if (sire != NULL) { 1293da14cebeSEric Cheng gw = sire->ire_gateway_addr; 1294da14cebeSEric Cheng ASSERT((sire->ire_type & 1295da14cebeSEric Cheng (IRE_CACHETABLE | IRE_INTERFACE)) == 0); 1296da14cebeSEric Cheng UPDATE_OB_PKT_COUNT(sire); 1297da14cebeSEric Cheng } 1298da14cebeSEric Cheng 1299*e11c3f44Smeem dst_ill = ire->ire_ipif->ipif_ill; 1300*e11c3f44Smeem if (IS_IPMP(dst_ill)) 1301*e11c3f44Smeem dst_ill = ipmp_illgrp_hold_next_ill(dst_ill->ill_grp); 1302*e11c3f44Smeem else 1303*e11c3f44Smeem ill_refhold(dst_ill); /* for symmetry */ 1304*e11c3f44Smeem 1305da14cebeSEric Cheng if (dst_ill == NULL) { 1306*e11c3f44Smeem ip2dbg(("ire_forward_simple: no dst ill; ire 0x%p\n", 1307da14cebeSEric Cheng (void *)ire)); 1308da14cebeSEric Cheng goto icmp_err_ret; 1309da14cebeSEric Cheng } 1310da14cebeSEric Cheng 1311da14cebeSEric Cheng ASSERT(src_ipif == NULL); 1312da14cebeSEric Cheng /* Now obtain the src_ipif */ 1313*e11c3f44Smeem src_ipif = ire_forward_src_ipif(dst, sire, ire, zoneid, &ire_marks); 1314da14cebeSEric Cheng if (src_ipif == NULL) 1315da14cebeSEric Cheng goto icmp_err_ret; 1316da14cebeSEric Cheng 1317da14cebeSEric Cheng switch (ire->ire_type) { 1318da14cebeSEric Cheng case IRE_IF_NORESOLVER: 1319da14cebeSEric Cheng /* create ire_cache for ire_addr endpoint */ 1320da14cebeSEric Cheng case IRE_IF_RESOLVER: 1321da14cebeSEric Cheng /* 1322da14cebeSEric Cheng * We have the IRE_IF_RESOLVER of the nexthop gateway 1323da14cebeSEric Cheng * and now need to build a IRE_CACHE for it. 1324da14cebeSEric Cheng * In this case, we have the following : 1325da14cebeSEric Cheng * 1326da14cebeSEric Cheng * 1) src_ipif - used for getting a source address. 1327da14cebeSEric Cheng * 1328da14cebeSEric Cheng * 2) dst_ill - from which we derive ire_stq/ire_rfq. This 1329da14cebeSEric Cheng * means packets using the IRE_CACHE that we will build 1330da14cebeSEric Cheng * here will go out on dst_ill. 1331da14cebeSEric Cheng * 1332da14cebeSEric Cheng * 3) sire may or may not be NULL. But, the IRE_CACHE that is 1333da14cebeSEric Cheng * to be created will only be tied to the IRE_INTERFACE 1334da14cebeSEric Cheng * that was derived from the ire_ihandle field. 1335da14cebeSEric Cheng * 1336da14cebeSEric Cheng * If sire is non-NULL, it means the destination is 1337da14cebeSEric Cheng * off-link and we will first create the IRE_CACHE for the 1338da14cebeSEric Cheng * gateway. 1339da14cebeSEric Cheng */ 1340da14cebeSEric Cheng res_mp = dst_ill->ill_resolver_mp; 1341da14cebeSEric Cheng if (ire->ire_type == IRE_IF_RESOLVER && 1342da14cebeSEric Cheng (!OK_RESOLVER_MP(res_mp))) { 1343da14cebeSEric Cheng ire_refrele(ire); 1344da14cebeSEric Cheng ire = NULL; 1345da14cebeSEric Cheng goto out; 1346da14cebeSEric Cheng } 1347da14cebeSEric Cheng /* 1348da14cebeSEric Cheng * To be at this point in the code with a non-zero gw 1349da14cebeSEric Cheng * means that dst is reachable through a gateway that 1350da14cebeSEric Cheng * we have never resolved. By changing dst to the gw 1351da14cebeSEric Cheng * addr we resolve the gateway first. 1352da14cebeSEric Cheng */ 1353da14cebeSEric Cheng if (gw != INADDR_ANY) { 1354da14cebeSEric Cheng /* 1355da14cebeSEric Cheng * The source ipif that was determined above was 1356da14cebeSEric Cheng * relative to the destination address, not the 1357da14cebeSEric Cheng * gateway's. If src_ipif was not taken out of 1358da14cebeSEric Cheng * the IRE_IF_RESOLVER entry, we'll need to call 1359da14cebeSEric Cheng * ipif_select_source() again. 1360da14cebeSEric Cheng */ 1361da14cebeSEric Cheng if (src_ipif != ire->ire_ipif) { 1362da14cebeSEric Cheng ipif_refrele(src_ipif); 1363da14cebeSEric Cheng src_ipif = ipif_select_source(dst_ill, 1364da14cebeSEric Cheng gw, zoneid); 1365da14cebeSEric Cheng if (src_ipif == NULL) 1366da14cebeSEric Cheng goto icmp_err_ret; 1367da14cebeSEric Cheng } 1368da14cebeSEric Cheng dst = gw; 1369da14cebeSEric Cheng gw = INADDR_ANY; 1370da14cebeSEric Cheng } 1371da14cebeSEric Cheng 1372da14cebeSEric Cheng if (ire->ire_type == IRE_IF_NORESOLVER) 1373da14cebeSEric Cheng dst = ire->ire_addr; /* ire_cache for tunnel endpoint */ 1374da14cebeSEric Cheng 1375da14cebeSEric Cheng save_ire = ire; 1376da14cebeSEric Cheng /* 1377da14cebeSEric Cheng * create an incomplete IRE_CACHE. 1378da14cebeSEric Cheng * An areq_mp will be generated in ire_arpresolve() for 1379da14cebeSEric Cheng * RESOLVER interfaces. 1380da14cebeSEric Cheng */ 1381da14cebeSEric Cheng ire = ire_create( 1382da14cebeSEric Cheng (uchar_t *)&dst, /* dest address */ 1383da14cebeSEric Cheng (uchar_t *)&ip_g_all_ones, /* mask */ 1384da14cebeSEric Cheng (uchar_t *)&src_ipif->ipif_src_addr, /* src addr */ 1385da14cebeSEric Cheng (uchar_t *)&gw, /* gateway address */ 1386da14cebeSEric Cheng (save_ire->ire_type == IRE_IF_RESOLVER ? NULL: 1387da14cebeSEric Cheng &save_ire->ire_max_frag), 1388da14cebeSEric Cheng NULL, 1389da14cebeSEric Cheng dst_ill->ill_rq, /* recv-from queue */ 1390da14cebeSEric Cheng dst_ill->ill_wq, /* send-to queue */ 1391da14cebeSEric Cheng IRE_CACHE, /* IRE type */ 1392da14cebeSEric Cheng src_ipif, 1393da14cebeSEric Cheng ire->ire_mask, /* Parent mask */ 1394da14cebeSEric Cheng 0, 1395da14cebeSEric Cheng ire->ire_ihandle, /* Interface handle */ 1396da14cebeSEric Cheng 0, 1397da14cebeSEric Cheng &(ire->ire_uinfo), 1398da14cebeSEric Cheng NULL, 1399da14cebeSEric Cheng NULL, 1400da14cebeSEric Cheng ipst); 1401da14cebeSEric Cheng ip1dbg(("incomplete ire_cache 0x%p\n", (void *)ire)); 1402da14cebeSEric Cheng if (ire != NULL) { 1403da14cebeSEric Cheng ire->ire_marks |= ire_marks; 1404da14cebeSEric Cheng /* add the incomplete ire: */ 1405da14cebeSEric Cheng error = ire_add(&ire, NULL, NULL, NULL, B_TRUE); 1406da14cebeSEric Cheng if (error == 0 && ire != NULL) { 1407da14cebeSEric Cheng ire->ire_max_frag = save_ire->ire_max_frag; 1408da14cebeSEric Cheng ip1dbg(("setting max_frag to %d in ire 0x%p\n", 1409da14cebeSEric Cheng ire->ire_max_frag, (void *)ire)); 1410da14cebeSEric Cheng } else { 1411da14cebeSEric Cheng ire_refrele(save_ire); 1412da14cebeSEric Cheng goto icmp_err_ret; 1413da14cebeSEric Cheng } 1414da14cebeSEric Cheng } 1415da14cebeSEric Cheng 1416da14cebeSEric Cheng ire_refrele(save_ire); 1417da14cebeSEric Cheng break; 1418da14cebeSEric Cheng default: 1419da14cebeSEric Cheng break; 1420da14cebeSEric Cheng } 1421da14cebeSEric Cheng 1422da14cebeSEric Cheng out: 1423da14cebeSEric Cheng *ret_action = Forward_ok; 1424da14cebeSEric Cheng if (sire != NULL) 1425da14cebeSEric Cheng ire_refrele(sire); 1426da14cebeSEric Cheng if (dst_ill != NULL) 1427da14cebeSEric Cheng ill_refrele(dst_ill); 1428da14cebeSEric Cheng if (src_ipif != NULL) 1429da14cebeSEric Cheng ipif_refrele(src_ipif); 1430da14cebeSEric Cheng return (ire); 1431da14cebeSEric Cheng icmp_err_ret: 1432da14cebeSEric Cheng *ret_action = Forward_ret_icmp_err; 1433da14cebeSEric Cheng if (src_ipif != NULL) 1434da14cebeSEric Cheng ipif_refrele(src_ipif); 1435da14cebeSEric Cheng if (dst_ill != NULL) 1436da14cebeSEric Cheng ill_refrele(dst_ill); 1437da14cebeSEric Cheng if (sire != NULL) 1438da14cebeSEric Cheng ire_refrele(sire); 1439da14cebeSEric Cheng if (ire != NULL) { 1440da14cebeSEric Cheng if (ire->ire_flags & RTF_BLACKHOLE) 1441da14cebeSEric Cheng *ret_action = Forward_blackhole; 1442da14cebeSEric Cheng ire_refrele(ire); 1443da14cebeSEric Cheng } 1444da14cebeSEric Cheng /* caller needs to send icmp error message */ 1445da14cebeSEric Cheng return (NULL); 1446c793af95Ssangeeta 1447c793af95Ssangeeta } 1448c793af95Ssangeeta 1449c793af95Ssangeeta /* 1450f4b3ec61Sdh155122 * Obtain the rt_entry and rt_irb for the route to be added to 1451f4b3ec61Sdh155122 * the ips_ip_ftable. 1452c793af95Ssangeeta * First attempt to add a node to the radix tree via rn_addroute. If the 1453c793af95Ssangeeta * route already exists, return the bucket for the existing route. 1454c793af95Ssangeeta * 1455c793af95Ssangeeta * Locking notes: Need to hold the global radix tree lock in write mode to 1456c793af95Ssangeeta * add a radix node. To prevent the node from being deleted, ire_get_bucket() 1457c793af95Ssangeeta * returns with a ref'ed irb_t. The ire itself is added in ire_add_v4() 1458c793af95Ssangeeta * while holding the irb_lock, but not the radix tree lock. 1459c793af95Ssangeeta */ 1460c793af95Ssangeeta irb_t * 1461c793af95Ssangeeta ire_get_bucket(ire_t *ire) 1462c793af95Ssangeeta { 1463c793af95Ssangeeta struct radix_node *rn; 1464c793af95Ssangeeta struct rt_entry *rt; 1465c793af95Ssangeeta struct rt_sockaddr rmask, rdst; 1466c793af95Ssangeeta irb_t *irb = NULL; 1467f4b3ec61Sdh155122 ip_stack_t *ipst = ire->ire_ipst; 1468c793af95Ssangeeta 1469f4b3ec61Sdh155122 ASSERT(ipst->ips_ip_ftable != NULL); 1470c793af95Ssangeeta 1471c793af95Ssangeeta /* first try to see if route exists (based on rtalloc1) */ 1472c793af95Ssangeeta (void) memset(&rdst, 0, sizeof (rdst)); 1473c793af95Ssangeeta rdst.rt_sin_len = sizeof (rdst); 1474c793af95Ssangeeta rdst.rt_sin_family = AF_INET; 1475c793af95Ssangeeta rdst.rt_sin_addr.s_addr = ire->ire_addr; 1476c793af95Ssangeeta 1477c793af95Ssangeeta (void) memset(&rmask, 0, sizeof (rmask)); 1478c793af95Ssangeeta rmask.rt_sin_len = sizeof (rmask); 1479c793af95Ssangeeta rmask.rt_sin_family = AF_INET; 1480c793af95Ssangeeta rmask.rt_sin_addr.s_addr = ire->ire_mask; 1481c793af95Ssangeeta 1482c793af95Ssangeeta /* 1483c793af95Ssangeeta * add the route. based on BSD's rtrequest1(RTM_ADD) 1484c793af95Ssangeeta */ 1485c793af95Ssangeeta R_Malloc(rt, rt_entry_cache, sizeof (*rt)); 148629bc4795Ssangeeta /* kmem_alloc failed */ 148729bc4795Ssangeeta if (rt == NULL) 148829bc4795Ssangeeta return (NULL); 148929bc4795Ssangeeta 1490c793af95Ssangeeta (void) memset(rt, 0, sizeof (*rt)); 1491c793af95Ssangeeta rt->rt_nodes->rn_key = (char *)&rt->rt_dst; 1492c793af95Ssangeeta rt->rt_dst = rdst; 1493c793af95Ssangeeta irb = &rt->rt_irb; 1494c793af95Ssangeeta irb->irb_marks |= IRB_MARK_FTABLE; /* dynamically allocated/freed */ 1495f4b3ec61Sdh155122 irb->irb_ipst = ipst; 1496c793af95Ssangeeta rw_init(&irb->irb_lock, NULL, RW_DEFAULT, NULL); 1497f4b3ec61Sdh155122 RADIX_NODE_HEAD_WLOCK(ipst->ips_ip_ftable); 1498f4b3ec61Sdh155122 rn = ipst->ips_ip_ftable->rnh_addaddr(&rt->rt_dst, &rmask, 1499f4b3ec61Sdh155122 ipst->ips_ip_ftable, (struct radix_node *)rt); 1500c793af95Ssangeeta if (rn == NULL) { 1501f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1502c793af95Ssangeeta Free(rt, rt_entry_cache); 1503c793af95Ssangeeta rt = NULL; 1504c793af95Ssangeeta irb = NULL; 1505f4b3ec61Sdh155122 RADIX_NODE_HEAD_RLOCK(ipst->ips_ip_ftable); 1506f4b3ec61Sdh155122 rn = ipst->ips_ip_ftable->rnh_lookup(&rdst, &rmask, 1507f4b3ec61Sdh155122 ipst->ips_ip_ftable); 1508f4b3ec61Sdh155122 if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { 1509c793af95Ssangeeta /* found a non-root match */ 1510c793af95Ssangeeta rt = (struct rt_entry *)rn; 1511c793af95Ssangeeta } 1512c793af95Ssangeeta } 1513c793af95Ssangeeta if (rt != NULL) { 1514c793af95Ssangeeta irb = &rt->rt_irb; 1515c793af95Ssangeeta IRB_REFHOLD(irb); 1516c793af95Ssangeeta } 1517f4b3ec61Sdh155122 RADIX_NODE_HEAD_UNLOCK(ipst->ips_ip_ftable); 1518c793af95Ssangeeta return (irb); 1519c793af95Ssangeeta } 1520c793af95Ssangeeta 1521c793af95Ssangeeta /* 1522c793af95Ssangeeta * This function is used when the caller wants to know the outbound 1523c793af95Ssangeeta * interface for a packet given only the address. 1524c793af95Ssangeeta * If this is a offlink IP address and there are multiple 1525c793af95Ssangeeta * routes to this destination, this routine will utilise the 1526c793af95Ssangeeta * first route it finds to IP address 1527c793af95Ssangeeta * Return values: 1528c793af95Ssangeeta * 0 - FAILURE 1529c793af95Ssangeeta * nonzero - ifindex 1530c793af95Ssangeeta */ 1531c793af95Ssangeeta uint_t 1532c793af95Ssangeeta ifindex_lookup(const struct sockaddr *ipaddr, zoneid_t zoneid) 1533c793af95Ssangeeta { 1534c793af95Ssangeeta uint_t ifindex = 0; 1535c793af95Ssangeeta ire_t *ire; 1536c793af95Ssangeeta ill_t *ill; 1537f4b3ec61Sdh155122 netstack_t *ns; 1538f4b3ec61Sdh155122 ip_stack_t *ipst; 1539c793af95Ssangeeta 1540f4b3ec61Sdh155122 if (zoneid == ALL_ZONES) 1541f4b3ec61Sdh155122 ns = netstack_find_by_zoneid(GLOBAL_ZONEID); 1542f4b3ec61Sdh155122 else 1543f4b3ec61Sdh155122 ns = netstack_find_by_zoneid(zoneid); 1544f4b3ec61Sdh155122 ASSERT(ns != NULL); 1545f4b3ec61Sdh155122 1546f4b3ec61Sdh155122 /* 1547f4b3ec61Sdh155122 * For exclusive stacks we set the zoneid to zero 1548f4b3ec61Sdh155122 * since IP uses the global zoneid in the exclusive stacks. 1549f4b3ec61Sdh155122 */ 1550f4b3ec61Sdh155122 if (ns->netstack_stackid != GLOBAL_NETSTACKID) 1551f4b3ec61Sdh155122 zoneid = GLOBAL_ZONEID; 1552f4b3ec61Sdh155122 ipst = ns->netstack_ip; 1553c793af95Ssangeeta 1554c793af95Ssangeeta ASSERT(ipaddr->sa_family == AF_INET || ipaddr->sa_family == AF_INET6); 1555c793af95Ssangeeta 1556f4b3ec61Sdh155122 if ((ire = route_to_dst(ipaddr, zoneid, ipst)) != NULL) { 1557c793af95Ssangeeta ill = ire_to_ill(ire); 1558c793af95Ssangeeta if (ill != NULL) 1559c793af95Ssangeeta ifindex = ill->ill_phyint->phyint_ifindex; 1560c793af95Ssangeeta ire_refrele(ire); 1561c793af95Ssangeeta } 1562f4b3ec61Sdh155122 netstack_rele(ns); 1563c793af95Ssangeeta return (ifindex); 1564c793af95Ssangeeta } 1565c793af95Ssangeeta 1566c793af95Ssangeeta /* 1567c793af95Ssangeeta * Routine to find the route to a destination. If a ifindex is supplied 1568c793af95Ssangeeta * it tries to match the the route to the corresponding ipif for the ifindex 1569c793af95Ssangeeta */ 1570c793af95Ssangeeta static ire_t * 1571f4b3ec61Sdh155122 route_to_dst(const struct sockaddr *dst_addr, zoneid_t zoneid, ip_stack_t *ipst) 1572c793af95Ssangeeta { 1573c793af95Ssangeeta ire_t *ire = NULL; 1574c793af95Ssangeeta int match_flags; 1575c793af95Ssangeeta 1576c793af95Ssangeeta match_flags = (MATCH_IRE_DSTONLY | MATCH_IRE_DEFAULT | 1577c793af95Ssangeeta MATCH_IRE_RECURSIVE | MATCH_IRE_RJ_BHOLE); 1578c793af95Ssangeeta 1579c793af95Ssangeeta /* XXX pass NULL tsl for now */ 1580c793af95Ssangeeta 1581c793af95Ssangeeta if (dst_addr->sa_family == AF_INET) { 1582c793af95Ssangeeta ire = ire_route_lookup( 1583c793af95Ssangeeta ((struct sockaddr_in *)dst_addr)->sin_addr.s_addr, 1584f4b3ec61Sdh155122 0, 0, 0, NULL, NULL, zoneid, NULL, match_flags, ipst); 1585c793af95Ssangeeta } else { 1586c793af95Ssangeeta ire = ire_route_lookup_v6( 1587c793af95Ssangeeta &((struct sockaddr_in6 *)dst_addr)->sin6_addr, 1588f4b3ec61Sdh155122 0, 0, 0, NULL, NULL, zoneid, NULL, match_flags, ipst); 1589c793af95Ssangeeta } 1590c793af95Ssangeeta return (ire); 1591c793af95Ssangeeta } 1592c793af95Ssangeeta 1593c793af95Ssangeeta /* 1594c793af95Ssangeeta * This routine is called by IP Filter to send a packet out on the wire 1595c793af95Ssangeeta * to a specified V4 dst (which may be onlink or offlink). The ifindex may or 1596c793af95Ssangeeta * may not be 0. A non-null ifindex indicates IP Filter has stipulated 1597c793af95Ssangeeta * an outgoing interface and requires the nexthop to be on that interface. 1598c793af95Ssangeeta * IP WILL NOT DO the following to the data packet before sending it out: 1599c793af95Ssangeeta * a. manipulate ttl 1600edd26dc5Sdr146992 * b. ipsec work 1601edd26dc5Sdr146992 * c. fragmentation 1602edd26dc5Sdr146992 * 1603edd26dc5Sdr146992 * If the packet has been prepared for hardware checksum then it will be 1604edd26dc5Sdr146992 * passed off to ip_send_align_cksum() to check that the flags set on the 1605edd26dc5Sdr146992 * packet are in alignment with the capabilities of the new outgoing NIC. 1606c793af95Ssangeeta * 1607c793af95Ssangeeta * Return values: 1608c793af95Ssangeeta * 0: IP was able to send of the data pkt 1609c793af95Ssangeeta * ECOMM: Could not send packet 1610c793af95Ssangeeta * ENONET No route to dst. It is up to the caller 1611c793af95Ssangeeta * to send icmp unreachable error message, 1612c793af95Ssangeeta * EINPROGRESS The macaddr of the onlink dst or that 1613c793af95Ssangeeta * of the offlink dst's nexthop needs to get 1614c793af95Ssangeeta * resolved before packet can be sent to dst. 1615c793af95Ssangeeta * Thus transmission is not guaranteed. 1616c793af95Ssangeeta * 1617c793af95Ssangeeta */ 1618c793af95Ssangeeta 1619c793af95Ssangeeta int 1620c793af95Ssangeeta ipfil_sendpkt(const struct sockaddr *dst_addr, mblk_t *mp, uint_t ifindex, 1621c793af95Ssangeeta zoneid_t zoneid) 1622c793af95Ssangeeta { 1623c793af95Ssangeeta ire_t *ire = NULL, *sire = NULL; 1624c793af95Ssangeeta ire_t *ire_cache = NULL; 1625c793af95Ssangeeta int value; 1626c793af95Ssangeeta int match_flags; 1627c793af95Ssangeeta ipaddr_t dst; 1628f4b3ec61Sdh155122 netstack_t *ns; 1629f4b3ec61Sdh155122 ip_stack_t *ipst; 163042ee8d71Sja97890 enum ire_forward_action ret_action; 1631c793af95Ssangeeta 1632c793af95Ssangeeta ASSERT(mp != NULL); 1633c793af95Ssangeeta 1634f4b3ec61Sdh155122 if (zoneid == ALL_ZONES) 1635f4b3ec61Sdh155122 ns = netstack_find_by_zoneid(GLOBAL_ZONEID); 1636f4b3ec61Sdh155122 else 1637f4b3ec61Sdh155122 ns = netstack_find_by_zoneid(zoneid); 1638f4b3ec61Sdh155122 ASSERT(ns != NULL); 1639f4b3ec61Sdh155122 1640f4b3ec61Sdh155122 /* 1641f4b3ec61Sdh155122 * For exclusive stacks we set the zoneid to zero 1642f4b3ec61Sdh155122 * since IP uses the global zoneid in the exclusive stacks. 1643f4b3ec61Sdh155122 */ 1644f4b3ec61Sdh155122 if (ns->netstack_stackid != GLOBAL_NETSTACKID) 1645f4b3ec61Sdh155122 zoneid = GLOBAL_ZONEID; 1646f4b3ec61Sdh155122 ipst = ns->netstack_ip; 1647f4b3ec61Sdh155122 1648c793af95Ssangeeta ASSERT(dst_addr->sa_family == AF_INET || 1649c793af95Ssangeeta dst_addr->sa_family == AF_INET6); 1650c793af95Ssangeeta 1651c793af95Ssangeeta if (dst_addr->sa_family == AF_INET) { 1652c793af95Ssangeeta dst = ((struct sockaddr_in *)dst_addr)->sin_addr.s_addr; 1653c793af95Ssangeeta } else { 1654c793af95Ssangeeta /* 1655c793af95Ssangeeta * We dont have support for V6 yet. It will be provided 1656c793af95Ssangeeta * once RFE 6399103 has been delivered. 1657c793af95Ssangeeta * Until then, for V6 dsts, IP Filter will not call 1658a9a89b0dSdr146992 * this function. Instead the netinfo framework provides 1659a9a89b0dSdr146992 * its own code path, in ip_inject_impl(), to achieve 1660a9a89b0dSdr146992 * what it needs to do, for the time being. 1661c793af95Ssangeeta */ 1662c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: no V6 support \n")); 1663c793af95Ssangeeta value = ECOMM; 1664c793af95Ssangeeta freemsg(mp); 1665c793af95Ssangeeta goto discard; 1666c793af95Ssangeeta } 1667c793af95Ssangeeta 1668c793af95Ssangeeta /* 1669c793af95Ssangeeta * Lets get the ire. We might get the ire cache entry, 1670c793af95Ssangeeta * or the ire,sire pair needed to create the cache entry. 1671c793af95Ssangeeta * XXX pass NULL tsl for now. 1672c793af95Ssangeeta */ 1673c793af95Ssangeeta 1674c793af95Ssangeeta if (ifindex == 0) { 1675c793af95Ssangeeta /* There is no supplied index. So use the FIB info */ 1676c793af95Ssangeeta 1677c793af95Ssangeeta match_flags = (MATCH_IRE_DSTONLY | MATCH_IRE_DEFAULT | 1678c793af95Ssangeeta MATCH_IRE_RECURSIVE | MATCH_IRE_RJ_BHOLE); 1679c793af95Ssangeeta ire = ire_route_lookup(dst, 1680c793af95Ssangeeta 0, 0, 0, NULL, &sire, zoneid, MBLK_GETLABEL(mp), 1681f4b3ec61Sdh155122 match_flags, ipst); 1682c793af95Ssangeeta } else { 1683c793af95Ssangeeta ipif_t *supplied_ipif; 1684c793af95Ssangeeta ill_t *ill; 1685c793af95Ssangeeta 168667c1caeeSnordmark match_flags = (MATCH_IRE_DSTONLY | MATCH_IRE_DEFAULT | 168767c1caeeSnordmark MATCH_IRE_RECURSIVE| MATCH_IRE_RJ_BHOLE| 1688*e11c3f44Smeem MATCH_IRE_SECATTR | MATCH_IRE_ILL); 168967c1caeeSnordmark 1690c793af95Ssangeeta /* 1691c793af95Ssangeeta * If supplied ifindex is non-null, the only valid 1692*e11c3f44Smeem * nexthop is one off of the interface corresponding 1693c793af95Ssangeeta * to the specified ifindex. 1694c793af95Ssangeeta */ 1695c793af95Ssangeeta ill = ill_lookup_on_ifindex(ifindex, B_FALSE, 1696f4b3ec61Sdh155122 NULL, NULL, NULL, NULL, ipst); 1697c793af95Ssangeeta if (ill != NULL) { 1698*e11c3f44Smeem supplied_ipif = ipif_get_next_ipif(NULL, ill); 1699c793af95Ssangeeta } else { 1700c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: Could not find" 1701c793af95Ssangeeta " route to dst\n")); 1702c793af95Ssangeeta value = ECOMM; 1703c793af95Ssangeeta freemsg(mp); 1704c793af95Ssangeeta goto discard; 1705c793af95Ssangeeta } 1706c793af95Ssangeeta 1707c793af95Ssangeeta ire = ire_route_lookup(dst, 0, 0, 0, supplied_ipif, 1708f4b3ec61Sdh155122 &sire, zoneid, MBLK_GETLABEL(mp), match_flags, ipst); 1709381a2a9aSdr146992 ipif_refrele(supplied_ipif); 1710c793af95Ssangeeta ill_refrele(ill); 1711c793af95Ssangeeta } 1712c793af95Ssangeeta 1713c793af95Ssangeeta /* 1714c793af95Ssangeeta * Verify that the returned IRE is non-null and does 1715c793af95Ssangeeta * not have either the RTF_REJECT or RTF_BLACKHOLE 1716c793af95Ssangeeta * flags set and that the IRE is either an IRE_CACHE, 1717c793af95Ssangeeta * IRE_IF_NORESOLVER or IRE_IF_RESOLVER. 1718c793af95Ssangeeta */ 1719c793af95Ssangeeta if (ire == NULL || 1720c793af95Ssangeeta ((ire->ire_flags & (RTF_REJECT | RTF_BLACKHOLE)) || 1721c793af95Ssangeeta (ire->ire_type & (IRE_CACHE | IRE_INTERFACE)) == 0)) { 1722c793af95Ssangeeta /* 1723c793af95Ssangeeta * Either ire could not be found or we got 1724c793af95Ssangeeta * an invalid one 1725c793af95Ssangeeta */ 1726c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: Could not find route to dst\n")); 1727c793af95Ssangeeta value = ENONET; 1728c793af95Ssangeeta freemsg(mp); 1729c793af95Ssangeeta goto discard; 1730c793af95Ssangeeta } 1731c793af95Ssangeeta 1732c793af95Ssangeeta /* IP Filter and CGTP dont mix. So bail out if CGTP is on */ 1733655a42e2Snordmark if (ipst->ips_ip_cgtp_filter && 1734c793af95Ssangeeta ((ire->ire_flags & RTF_MULTIRT) || 1735c793af95Ssangeeta ((sire != NULL) && (sire->ire_flags & RTF_MULTIRT)))) { 1736c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: IPFilter does not work with CGTP\n")); 1737c793af95Ssangeeta value = ECOMM; 1738c793af95Ssangeeta freemsg(mp); 1739c793af95Ssangeeta goto discard; 1740c793af95Ssangeeta } 1741c793af95Ssangeeta 1742381a2a9aSdr146992 ASSERT(ire->ire_type != IRE_CACHE || ire->ire_nce != NULL); 1743edd26dc5Sdr146992 1744c793af95Ssangeeta /* 1745c793af95Ssangeeta * If needed, we will create the ire cache entry for the 1746c793af95Ssangeeta * nexthop, resolve its link-layer address and then send 1747edd26dc5Sdr146992 * the packet out without ttl or IPSec processing. 1748c793af95Ssangeeta */ 1749c793af95Ssangeeta switch (ire->ire_type) { 1750c793af95Ssangeeta case IRE_CACHE: 1751c793af95Ssangeeta if (sire != NULL) { 1752c793af95Ssangeeta UPDATE_OB_PKT_COUNT(sire); 1753c793af95Ssangeeta sire->ire_last_used_time = lbolt; 1754c793af95Ssangeeta ire_refrele(sire); 1755c793af95Ssangeeta } 1756c793af95Ssangeeta ire_cache = ire; 1757c793af95Ssangeeta break; 17587a4afe69Ssangeeta case IRE_IF_NORESOLVER: 1759c793af95Ssangeeta case IRE_IF_RESOLVER: 1760c793af95Ssangeeta /* 1761c793af95Ssangeeta * Call ire_forward(). This function 1762c793af95Ssangeeta * will, create the ire cache entry of the 1763c793af95Ssangeeta * the nexthop and adds this incomplete ire 1764c793af95Ssangeeta * to the ire cache table 1765c793af95Ssangeeta */ 176642ee8d71Sja97890 ire_cache = ire_forward(dst, &ret_action, ire, sire, 1767f4b3ec61Sdh155122 MBLK_GETLABEL(mp), ipst); 1768c793af95Ssangeeta if (ire_cache == NULL) { 1769c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: failed to create the" 1770c793af95Ssangeeta " ire cache entry \n")); 1771c793af95Ssangeeta value = ENONET; 1772c793af95Ssangeeta freemsg(mp); 1773c793af95Ssangeeta sire = NULL; 1774c793af95Ssangeeta ire = NULL; 1775c793af95Ssangeeta goto discard; 1776c793af95Ssangeeta } 1777c793af95Ssangeeta break; 1778c793af95Ssangeeta } 1779edd26dc5Sdr146992 1780edd26dc5Sdr146992 if (DB_CKSUMFLAGS(mp)) { 1781edd26dc5Sdr146992 if (ip_send_align_hcksum_flags(mp, ire_to_ill(ire_cache))) 1782edd26dc5Sdr146992 goto cleanup; 1783edd26dc5Sdr146992 } 1784edd26dc5Sdr146992 1785c793af95Ssangeeta /* 1786c793af95Ssangeeta * Now that we have the ire cache entry of the nexthop, call 1787c793af95Ssangeeta * ip_xmit_v4() to trigger mac addr resolution 1788c793af95Ssangeeta * if necessary and send it once ready. 1789c793af95Ssangeeta */ 1790c793af95Ssangeeta 1791da14cebeSEric Cheng value = ip_xmit_v4(mp, ire_cache, NULL, B_FALSE, NULL); 1792edd26dc5Sdr146992 cleanup: 1793c793af95Ssangeeta ire_refrele(ire_cache); 1794c793af95Ssangeeta /* 1795c793af95Ssangeeta * At this point, the reference for these have already been 1796c793af95Ssangeeta * released within ire_forward() and/or ip_xmit_v4(). So we set 1797c793af95Ssangeeta * them to NULL to make sure we dont drop the references 1798c793af95Ssangeeta * again in case ip_xmit_v4() returns with either SEND_FAILED 1799c793af95Ssangeeta * or LLHDR_RESLV_FAILED 1800c793af95Ssangeeta */ 1801c793af95Ssangeeta sire = NULL; 1802c793af95Ssangeeta ire = NULL; 1803c793af95Ssangeeta 1804c793af95Ssangeeta switch (value) { 1805c793af95Ssangeeta case SEND_FAILED: 1806c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: Send failed\n")); 1807c793af95Ssangeeta value = ECOMM; 1808c793af95Ssangeeta break; 1809c793af95Ssangeeta case LLHDR_RESLV_FAILED: 1810c793af95Ssangeeta ip1dbg(("ipfil_sendpkt: Link-layer resolution" 1811c793af95Ssangeeta " failed\n")); 1812c793af95Ssangeeta value = ECOMM; 1813c793af95Ssangeeta break; 1814c793af95Ssangeeta case LOOKUP_IN_PROGRESS: 1815f4b3ec61Sdh155122 netstack_rele(ns); 1816c793af95Ssangeeta return (EINPROGRESS); 1817c793af95Ssangeeta case SEND_PASSED: 1818f4b3ec61Sdh155122 netstack_rele(ns); 1819c793af95Ssangeeta return (0); 1820c793af95Ssangeeta } 1821c793af95Ssangeeta discard: 1822c793af95Ssangeeta if (dst_addr->sa_family == AF_INET) { 1823f4b3ec61Sdh155122 BUMP_MIB(&ipst->ips_ip_mib, ipIfStatsOutDiscards); 1824c793af95Ssangeeta } else { 1825f4b3ec61Sdh155122 BUMP_MIB(&ipst->ips_ip6_mib, ipIfStatsOutDiscards); 1826c793af95Ssangeeta } 1827c793af95Ssangeeta if (ire != NULL) 1828c793af95Ssangeeta ire_refrele(ire); 1829c793af95Ssangeeta if (sire != NULL) 1830c793af95Ssangeeta ire_refrele(sire); 1831f4b3ec61Sdh155122 netstack_rele(ns); 1832c793af95Ssangeeta return (value); 1833c793af95Ssangeeta } 1834c793af95Ssangeeta 1835edd26dc5Sdr146992 1836edd26dc5Sdr146992 /* 1837edd26dc5Sdr146992 * We don't check for dohwcksum in here because it should be being used 1838edd26dc5Sdr146992 * elsewhere to control what flags are being set on the mblk. That is, 1839edd26dc5Sdr146992 * if DB_CKSUMFLAGS() is non-zero then we assume dohwcksum to be true 1840edd26dc5Sdr146992 * for this packet. 1841edd26dc5Sdr146992 * 1842edd26dc5Sdr146992 * This function assumes that it is *only* being called for TCP or UDP 1843edd26dc5Sdr146992 * packets and nothing else. 1844edd26dc5Sdr146992 */ 1845edd26dc5Sdr146992 static int 1846edd26dc5Sdr146992 ip_send_align_hcksum_flags(mblk_t *mp, ill_t *ill) 1847edd26dc5Sdr146992 { 1848edd26dc5Sdr146992 int illhckflags; 1849edd26dc5Sdr146992 int mbhckflags; 1850edd26dc5Sdr146992 uint16_t *up; 1851edd26dc5Sdr146992 uint32_t cksum; 1852edd26dc5Sdr146992 ipha_t *ipha; 1853edd26dc5Sdr146992 ip6_t *ip6; 1854edd26dc5Sdr146992 int proto; 1855edd26dc5Sdr146992 int ipversion; 1856edd26dc5Sdr146992 int length; 1857edd26dc5Sdr146992 int start; 1858edd26dc5Sdr146992 ip6_pkt_t ipp; 1859edd26dc5Sdr146992 1860edd26dc5Sdr146992 mbhckflags = DB_CKSUMFLAGS(mp); 1861edd26dc5Sdr146992 ASSERT(mbhckflags != 0); 1862edd26dc5Sdr146992 ASSERT(mp->b_datap->db_type == M_DATA); 1863edd26dc5Sdr146992 /* 1864edd26dc5Sdr146992 * Since this function only knows how to manage the hardware checksum 1865edd26dc5Sdr146992 * issue, reject and packets that have flags set on the aside from 1866edd26dc5Sdr146992 * checksum related attributes as we cannot necessarily safely map 1867edd26dc5Sdr146992 * that packet onto the new NIC. Packets that can be potentially 1868edd26dc5Sdr146992 * dropped here include those marked for LSO. 1869edd26dc5Sdr146992 */ 1870edd26dc5Sdr146992 if ((mbhckflags & 1871edd26dc5Sdr146992 ~(HCK_FULLCKSUM|HCK_PARTIALCKSUM|HCK_IPV4_HDRCKSUM)) != 0) { 1872edd26dc5Sdr146992 DTRACE_PROBE2(pbr__incapable, (mblk_t *), mp, (ill_t *), ill); 1873edd26dc5Sdr146992 freemsg(mp); 1874edd26dc5Sdr146992 return (-1); 1875edd26dc5Sdr146992 } 1876edd26dc5Sdr146992 1877edd26dc5Sdr146992 ipha = (ipha_t *)mp->b_rptr; 1878edd26dc5Sdr146992 1879edd26dc5Sdr146992 /* 1880edd26dc5Sdr146992 * Find out what the new NIC is capable of, if anything, and 1881edd26dc5Sdr146992 * only allow it to be used with M_DATA mblks being sent out. 1882edd26dc5Sdr146992 */ 1883edd26dc5Sdr146992 if (ILL_HCKSUM_CAPABLE(ill)) { 1884edd26dc5Sdr146992 illhckflags = ill->ill_hcksum_capab->ill_hcksum_txflags; 1885edd26dc5Sdr146992 } else { 1886edd26dc5Sdr146992 /* 1887edd26dc5Sdr146992 * No capabilities, so turn off everything. 1888edd26dc5Sdr146992 */ 1889edd26dc5Sdr146992 illhckflags = 0; 1890edd26dc5Sdr146992 (void) hcksum_assoc(mp, NULL, NULL, 0, 0, 0, 0, 0, 0); 1891edd26dc5Sdr146992 mp->b_datap->db_struioflag &= ~STRUIO_IP; 1892edd26dc5Sdr146992 } 1893edd26dc5Sdr146992 1894edd26dc5Sdr146992 DTRACE_PROBE4(pbr__info__a, (mblk_t *), mp, (ill_t *), ill, 1895edd26dc5Sdr146992 uint32_t, illhckflags, uint32_t, mbhckflags); 1896edd26dc5Sdr146992 /* 1897edd26dc5Sdr146992 * This block of code that looks for the position of the TCP/UDP 1898edd26dc5Sdr146992 * checksum is early in this function because we need to know 1899edd26dc5Sdr146992 * what needs to be blanked out for the hardware checksum case. 1900edd26dc5Sdr146992 * 1901edd26dc5Sdr146992 * That we're in this function implies that the packet is either 1902edd26dc5Sdr146992 * TCP or UDP on Solaris, so checks are made for one protocol and 1903edd26dc5Sdr146992 * if that fails, the other is therefore implied. 1904edd26dc5Sdr146992 */ 1905edd26dc5Sdr146992 ipversion = IPH_HDR_VERSION(ipha); 1906edd26dc5Sdr146992 1907edd26dc5Sdr146992 if (ipversion == IPV4_VERSION) { 1908edd26dc5Sdr146992 proto = ipha->ipha_protocol; 1909edd26dc5Sdr146992 if (proto == IPPROTO_TCP) { 1910edd26dc5Sdr146992 up = IPH_TCPH_CHECKSUMP(ipha, IP_SIMPLE_HDR_LENGTH); 1911edd26dc5Sdr146992 } else { 1912edd26dc5Sdr146992 up = IPH_UDPH_CHECKSUMP(ipha, IP_SIMPLE_HDR_LENGTH); 1913edd26dc5Sdr146992 } 1914edd26dc5Sdr146992 } else { 1915edd26dc5Sdr146992 uint8_t lasthdr; 1916edd26dc5Sdr146992 1917edd26dc5Sdr146992 /* 1918edd26dc5Sdr146992 * Nothing I've seen indicates that IPv6 checksum'ing 1919edd26dc5Sdr146992 * precludes the presence of extension headers, so we 1920edd26dc5Sdr146992 * can't just look at the next header value in the IPv6 1921edd26dc5Sdr146992 * packet header to see if it is TCP/UDP. 1922edd26dc5Sdr146992 */ 1923edd26dc5Sdr146992 ip6 = (ip6_t *)ipha; 1924edd26dc5Sdr146992 (void) memset(&ipp, 0, sizeof (ipp)); 1925edd26dc5Sdr146992 start = ip_find_hdr_v6(mp, ip6, &ipp, &lasthdr); 1926edd26dc5Sdr146992 proto = lasthdr; 1927edd26dc5Sdr146992 1928edd26dc5Sdr146992 if (proto == IPPROTO_TCP) { 1929edd26dc5Sdr146992 up = IPH_TCPH_CHECKSUMP(ipha, start); 1930edd26dc5Sdr146992 } else { 1931edd26dc5Sdr146992 up = IPH_UDPH_CHECKSUMP(ipha, start); 1932edd26dc5Sdr146992 } 1933edd26dc5Sdr146992 } 1934edd26dc5Sdr146992 1935edd26dc5Sdr146992 /* 1936edd26dc5Sdr146992 * The first case here is easiest: 1937edd26dc5Sdr146992 * mblk hasn't asked for full checksum, but the card supports it. 1938edd26dc5Sdr146992 * 1939edd26dc5Sdr146992 * In addition, check for IPv4 header capability. Note that only 1940edd26dc5Sdr146992 * the mblk flag is checked and not ipversion. 1941edd26dc5Sdr146992 */ 1942edd26dc5Sdr146992 if ((((illhckflags & HCKSUM_INET_FULL_V4) && (ipversion == 4)) || 1943edd26dc5Sdr146992 (((illhckflags & HCKSUM_INET_FULL_V6) && (ipversion == 6)))) && 1944edd26dc5Sdr146992 ((mbhckflags & (HCK_FULLCKSUM|HCK_PARTIALCKSUM)) != 0)) { 1945edd26dc5Sdr146992 int newflags = HCK_FULLCKSUM; 1946edd26dc5Sdr146992 1947edd26dc5Sdr146992 if ((mbhckflags & HCK_IPV4_HDRCKSUM) != 0) { 1948edd26dc5Sdr146992 if ((illhckflags & HCKSUM_IPHDRCKSUM) != 0) { 1949edd26dc5Sdr146992 newflags |= HCK_IPV4_HDRCKSUM; 1950edd26dc5Sdr146992 } else { 1951edd26dc5Sdr146992 /* 1952edd26dc5Sdr146992 * Rather than call a function, just inline 1953edd26dc5Sdr146992 * the computation of the basic IPv4 header. 1954edd26dc5Sdr146992 */ 1955edd26dc5Sdr146992 cksum = (ipha->ipha_dst >> 16) + 1956edd26dc5Sdr146992 (ipha->ipha_dst & 0xFFFF) + 1957edd26dc5Sdr146992 (ipha->ipha_src >> 16) + 1958edd26dc5Sdr146992 (ipha->ipha_src & 0xFFFF); 1959edd26dc5Sdr146992 IP_HDR_CKSUM(ipha, cksum, 1960edd26dc5Sdr146992 ((uint32_t *)ipha)[0], 1961edd26dc5Sdr146992 ((uint16_t *)ipha)[4]); 1962edd26dc5Sdr146992 } 1963edd26dc5Sdr146992 } 1964edd26dc5Sdr146992 1965edd26dc5Sdr146992 *up = 0; 1966edd26dc5Sdr146992 (void) hcksum_assoc(mp, NULL, NULL, 0, 0, 0, 0, 1967edd26dc5Sdr146992 newflags, 0); 1968edd26dc5Sdr146992 return (0); 1969edd26dc5Sdr146992 } 1970edd26dc5Sdr146992 1971edd26dc5Sdr146992 DTRACE_PROBE2(pbr__info__b, int, ipversion, int, proto); 1972edd26dc5Sdr146992 1973edd26dc5Sdr146992 /* 1974edd26dc5Sdr146992 * Start calculating the pseudo checksum over the IP packet header. 1975edd26dc5Sdr146992 * Although the final pseudo checksum used by TCP/UDP consists of 1976edd26dc5Sdr146992 * more than just the address fields, we can use the result of 1977edd26dc5Sdr146992 * adding those together a little bit further down for IPv4. 1978edd26dc5Sdr146992 */ 1979edd26dc5Sdr146992 if (ipversion == IPV4_VERSION) { 1980edd26dc5Sdr146992 cksum = (ipha->ipha_dst >> 16) + (ipha->ipha_dst & 0xFFFF) + 1981edd26dc5Sdr146992 (ipha->ipha_src >> 16) + (ipha->ipha_src & 0xFFFF); 1982edd26dc5Sdr146992 start = IP_SIMPLE_HDR_LENGTH; 1983edd26dc5Sdr146992 length = ntohs(ipha->ipha_length); 1984edd26dc5Sdr146992 DTRACE_PROBE3(pbr__info__e, uint32_t, ipha->ipha_src, 1985edd26dc5Sdr146992 uint32_t, ipha->ipha_dst, int, cksum); 1986edd26dc5Sdr146992 } else { 1987edd26dc5Sdr146992 uint16_t *pseudo; 1988edd26dc5Sdr146992 1989edd26dc5Sdr146992 pseudo = (uint16_t *)&ip6->ip6_src; 1990edd26dc5Sdr146992 1991edd26dc5Sdr146992 /* calculate pseudo-header checksum */ 1992edd26dc5Sdr146992 cksum = pseudo[0] + pseudo[1] + pseudo[2] + pseudo[3] + 1993edd26dc5Sdr146992 pseudo[4] + pseudo[5] + pseudo[6] + pseudo[7] + 1994edd26dc5Sdr146992 pseudo[8] + pseudo[9] + pseudo[10] + pseudo[11] + 1995edd26dc5Sdr146992 pseudo[12] + pseudo[13] + pseudo[14] + pseudo[15]; 1996edd26dc5Sdr146992 1997edd26dc5Sdr146992 length = ntohs(ip6->ip6_plen) + sizeof (ip6_t); 1998edd26dc5Sdr146992 } 1999edd26dc5Sdr146992 2000edd26dc5Sdr146992 /* Fold the initial sum */ 2001edd26dc5Sdr146992 cksum = (cksum & 0xffff) + (cksum >> 16); 2002edd26dc5Sdr146992 2003edd26dc5Sdr146992 /* 2004edd26dc5Sdr146992 * If the packet was asking for an IPv4 header checksum to be 2005edd26dc5Sdr146992 * calculated but the interface doesn't support that, fill it in 2006edd26dc5Sdr146992 * using our pseudo checksum as a starting point. 2007edd26dc5Sdr146992 */ 2008edd26dc5Sdr146992 if (((mbhckflags & HCK_IPV4_HDRCKSUM) != 0) && 2009edd26dc5Sdr146992 ((illhckflags & HCKSUM_IPHDRCKSUM) == 0)) { 2010edd26dc5Sdr146992 /* 2011edd26dc5Sdr146992 * IP_HDR_CKSUM uses the 2rd arg to the macro in a destructive 2012edd26dc5Sdr146992 * way so pass in a copy of the checksum calculated thus far. 2013edd26dc5Sdr146992 */ 2014edd26dc5Sdr146992 uint32_t ipsum = cksum; 2015edd26dc5Sdr146992 2016edd26dc5Sdr146992 DB_CKSUMFLAGS(mp) &= ~HCK_IPV4_HDRCKSUM; 2017edd26dc5Sdr146992 2018edd26dc5Sdr146992 IP_HDR_CKSUM(ipha, ipsum, ((uint32_t *)ipha)[0], 2019edd26dc5Sdr146992 ((uint16_t *)ipha)[4]); 2020edd26dc5Sdr146992 } 2021edd26dc5Sdr146992 2022edd26dc5Sdr146992 DTRACE_PROBE3(pbr__info__c, int, start, int, length, int, cksum); 2023edd26dc5Sdr146992 2024edd26dc5Sdr146992 if (proto == IPPROTO_TCP) { 2025edd26dc5Sdr146992 cksum += IP_TCP_CSUM_COMP; 2026edd26dc5Sdr146992 } else { 2027edd26dc5Sdr146992 cksum += IP_UDP_CSUM_COMP; 2028edd26dc5Sdr146992 } 2029edd26dc5Sdr146992 cksum += htons(length - start); 2030edd26dc5Sdr146992 cksum = (cksum & 0xffff) + (cksum >> 16); 2031edd26dc5Sdr146992 2032edd26dc5Sdr146992 /* 2033edd26dc5Sdr146992 * For TCP/UDP, we either want to setup the packet for partial 2034edd26dc5Sdr146992 * checksum or we want to do it all ourselves because the NIC 2035edd26dc5Sdr146992 * offers no support for either partial or full checksum. 2036edd26dc5Sdr146992 */ 2037edd26dc5Sdr146992 if ((illhckflags & HCKSUM_INET_PARTIAL) != 0) { 2038edd26dc5Sdr146992 /* 2039edd26dc5Sdr146992 * The only case we care about here is if the mblk was 2040edd26dc5Sdr146992 * previously set for full checksum offload. If it was 2041edd26dc5Sdr146992 * marked for partial (and the NIC does partial), then 2042edd26dc5Sdr146992 * we have nothing to do. Similarly if the packet was 2043edd26dc5Sdr146992 * not set for partial or full, we do nothing as this 2044edd26dc5Sdr146992 * is cheaper than more work to set something up. 2045edd26dc5Sdr146992 */ 2046edd26dc5Sdr146992 if ((mbhckflags & HCK_FULLCKSUM) != 0) { 2047edd26dc5Sdr146992 uint32_t offset; 2048edd26dc5Sdr146992 2049edd26dc5Sdr146992 if (proto == IPPROTO_TCP) { 2050edd26dc5Sdr146992 offset = TCP_CHECKSUM_OFFSET; 2051edd26dc5Sdr146992 } else { 2052edd26dc5Sdr146992 offset = UDP_CHECKSUM_OFFSET; 2053edd26dc5Sdr146992 } 2054edd26dc5Sdr146992 *up = cksum; 2055edd26dc5Sdr146992 2056edd26dc5Sdr146992 DTRACE_PROBE3(pbr__info__f, int, length - start, int, 2057edd26dc5Sdr146992 cksum, int, offset); 2058edd26dc5Sdr146992 2059edd26dc5Sdr146992 (void) hcksum_assoc(mp, NULL, NULL, start, 2060edd26dc5Sdr146992 start + offset, length, 0, 2061edd26dc5Sdr146992 DB_CKSUMFLAGS(mp) | HCK_PARTIALCKSUM, 0); 2062edd26dc5Sdr146992 } 2063edd26dc5Sdr146992 2064edd26dc5Sdr146992 } else if (mbhckflags & (HCK_FULLCKSUM|HCK_PARTIALCKSUM)) { 2065edd26dc5Sdr146992 DB_CKSUMFLAGS(mp) &= ~(HCK_PARTIALCKSUM|HCK_FULLCKSUM); 2066edd26dc5Sdr146992 2067edd26dc5Sdr146992 *up = 0; 2068edd26dc5Sdr146992 *up = IP_CSUM(mp, start, cksum); 2069edd26dc5Sdr146992 } 2070edd26dc5Sdr146992 2071edd26dc5Sdr146992 DTRACE_PROBE4(pbr__info__d, (mblk_t *), mp, (ipha_t *), ipha, 2072edd26dc5Sdr146992 (uint16_t *), up, int, cksum); 2073edd26dc5Sdr146992 return (0); 2074edd26dc5Sdr146992 } 2075edd26dc5Sdr146992 2076c793af95Ssangeeta /* 2077c793af95Ssangeeta * callback function provided by ire_ftable_lookup when calling 2078c793af95Ssangeeta * rn_match_args(). Invoke ire_match_args on each matching leaf node in 2079c793af95Ssangeeta * the radix tree. 2080c793af95Ssangeeta */ 2081c793af95Ssangeeta boolean_t 2082c793af95Ssangeeta ire_find_best_route(struct radix_node *rn, void *arg) 2083c793af95Ssangeeta { 2084c793af95Ssangeeta struct rt_entry *rt = (struct rt_entry *)rn; 2085c793af95Ssangeeta irb_t *irb_ptr; 2086c793af95Ssangeeta ire_t *ire; 2087c793af95Ssangeeta ire_ftable_args_t *margs = arg; 2088c793af95Ssangeeta ipaddr_t match_mask; 2089c793af95Ssangeeta 2090c793af95Ssangeeta ASSERT(rt != NULL); 2091c793af95Ssangeeta 2092c793af95Ssangeeta irb_ptr = &rt->rt_irb; 2093c793af95Ssangeeta 2094c793af95Ssangeeta if (irb_ptr->irb_ire_cnt == 0) 2095c793af95Ssangeeta return (B_FALSE); 2096c793af95Ssangeeta 2097c793af95Ssangeeta rw_enter(&irb_ptr->irb_lock, RW_READER); 2098c793af95Ssangeeta for (ire = irb_ptr->irb_ire; ire != NULL; ire = ire->ire_next) { 2099c793af95Ssangeeta if (ire->ire_marks & IRE_MARK_CONDEMNED) 2100c793af95Ssangeeta continue; 2101c793af95Ssangeeta if (margs->ift_flags & MATCH_IRE_MASK) 2102c793af95Ssangeeta match_mask = margs->ift_mask; 2103c793af95Ssangeeta else 2104c793af95Ssangeeta match_mask = ire->ire_mask; 2105c793af95Ssangeeta 2106c793af95Ssangeeta if (ire_match_args(ire, margs->ift_addr, match_mask, 2107c793af95Ssangeeta margs->ift_gateway, margs->ift_type, margs->ift_ipif, 2108c793af95Ssangeeta margs->ift_zoneid, margs->ift_ihandle, margs->ift_tsl, 21095b17e9bdSJon Anderson margs->ift_flags, NULL)) { 2110c793af95Ssangeeta IRE_REFHOLD(ire); 2111c793af95Ssangeeta rw_exit(&irb_ptr->irb_lock); 2112c793af95Ssangeeta margs->ift_best_ire = ire; 2113c793af95Ssangeeta return (B_TRUE); 2114c793af95Ssangeeta } 2115c793af95Ssangeeta } 2116c793af95Ssangeeta rw_exit(&irb_ptr->irb_lock); 2117c793af95Ssangeeta return (B_FALSE); 2118c793af95Ssangeeta } 2119c793af95Ssangeeta 2120c793af95Ssangeeta /* 2121c793af95Ssangeeta * ftable irb_t structures are dynamically allocated, and we need to 2122c793af95Ssangeeta * check if the irb_t (and associated ftable tree attachment) needs to 2123c793af95Ssangeeta * be cleaned up when the irb_refcnt goes to 0. The conditions that need 2124c793af95Ssangeeta * be verified are: 2125c793af95Ssangeeta * - no other walkers of the irebucket, i.e., quiescent irb_refcnt, 2126c793af95Ssangeeta * - no other threads holding references to ire's in the bucket, 2127c793af95Ssangeeta * i.e., irb_nire == 0 2128c793af95Ssangeeta * - no active ire's in the bucket, i.e., irb_ire_cnt == 0 2129c793af95Ssangeeta * - need to hold the global tree lock and irb_lock in write mode. 2130c793af95Ssangeeta */ 2131c793af95Ssangeeta void 2132c793af95Ssangeeta irb_refrele_ftable(irb_t *irb) 2133c793af95Ssangeeta { 2134c793af95Ssangeeta for (;;) { 2135c793af95Ssangeeta rw_enter(&irb->irb_lock, RW_WRITER); 2136c793af95Ssangeeta ASSERT(irb->irb_refcnt != 0); 2137c793af95Ssangeeta if (irb->irb_refcnt != 1) { 2138c793af95Ssangeeta /* 2139c793af95Ssangeeta * Someone has a reference to this radix node 2140c793af95Ssangeeta * or there is some bucket walker. 2141c793af95Ssangeeta */ 2142c793af95Ssangeeta irb->irb_refcnt--; 2143c793af95Ssangeeta rw_exit(&irb->irb_lock); 2144c793af95Ssangeeta return; 2145c793af95Ssangeeta } else { 2146c793af95Ssangeeta /* 2147c793af95Ssangeeta * There is no other walker, nor is there any 2148c793af95Ssangeeta * other thread that holds a direct ref to this 2149c793af95Ssangeeta * radix node. Do the clean up if needed. Call 2150c793af95Ssangeeta * to ire_unlink will clear the IRB_MARK_CONDEMNED flag 2151c793af95Ssangeeta */ 2152c793af95Ssangeeta if (irb->irb_marks & IRB_MARK_CONDEMNED) { 2153c793af95Ssangeeta ire_t *ire_list; 2154c793af95Ssangeeta 2155c793af95Ssangeeta ire_list = ire_unlink(irb); 2156c793af95Ssangeeta rw_exit(&irb->irb_lock); 2157c793af95Ssangeeta 2158c793af95Ssangeeta if (ire_list != NULL) 2159c793af95Ssangeeta ire_cleanup(ire_list); 2160c793af95Ssangeeta /* 2161c793af95Ssangeeta * more CONDEMNED entries could have 2162c793af95Ssangeeta * been added while we dropped the lock, 2163c793af95Ssangeeta * so we have to re-check. 2164c793af95Ssangeeta */ 2165c793af95Ssangeeta continue; 2166c793af95Ssangeeta } 2167c793af95Ssangeeta 2168c793af95Ssangeeta /* 2169c793af95Ssangeeta * Now check if there are still any ires 2170c793af95Ssangeeta * associated with this radix node. 2171c793af95Ssangeeta */ 2172c793af95Ssangeeta if (irb->irb_nire != 0) { 2173c793af95Ssangeeta /* 2174c793af95Ssangeeta * someone is still holding on 2175c793af95Ssangeeta * to ires in this bucket 2176c793af95Ssangeeta */ 2177c793af95Ssangeeta irb->irb_refcnt--; 2178c793af95Ssangeeta rw_exit(&irb->irb_lock); 2179c793af95Ssangeeta return; 2180c793af95Ssangeeta } else { 2181c793af95Ssangeeta /* 2182c793af95Ssangeeta * Everything is clear. Zero walkers, 2183c793af95Ssangeeta * Zero threads with a ref to this 2184c793af95Ssangeeta * radix node, Zero ires associated with 2185c793af95Ssangeeta * this radix node. Due to lock order, 2186c793af95Ssangeeta * check the above conditions again 2187c793af95Ssangeeta * after grabbing all locks in the right order 2188c793af95Ssangeeta */ 2189c793af95Ssangeeta rw_exit(&irb->irb_lock); 2190c793af95Ssangeeta if (irb_inactive(irb)) 2191c793af95Ssangeeta return; 2192c793af95Ssangeeta /* 2193c793af95Ssangeeta * irb_inactive could not free the irb. 2194c793af95Ssangeeta * See if there are any walkers, if not 2195c793af95Ssangeeta * try to clean up again. 2196c793af95Ssangeeta */ 2197c793af95Ssangeeta } 2198c793af95Ssangeeta } 2199c793af95Ssangeeta } 2200c793af95Ssangeeta } 2201c793af95Ssangeeta 2202c793af95Ssangeeta /* 2203c793af95Ssangeeta * IRE iterator used by ire_ftable_lookup() to process multiple default 2204c793af95Ssangeeta * routes. Given a starting point in the hash list (ire_origin), walk the IREs 2205c793af95Ssangeeta * in the bucket skipping default interface routes and deleted entries. 2206c793af95Ssangeeta * Returns the next IRE (unheld), or NULL when we're back to the starting point. 2207c793af95Ssangeeta * Assumes that the caller holds a reference on the IRE bucket. 2208c793af95Ssangeeta * 2209c793af95Ssangeeta * In the absence of good IRE_DEFAULT routes, this function will return 2210c793af95Ssangeeta * the first IRE_INTERFACE route found (if any). 2211c793af95Ssangeeta */ 2212c793af95Ssangeeta ire_t * 2213f4b3ec61Sdh155122 ire_round_robin(irb_t *irb_ptr, zoneid_t zoneid, ire_ftable_args_t *margs, 2214f4b3ec61Sdh155122 ip_stack_t *ipst) 2215c793af95Ssangeeta { 2216c793af95Ssangeeta ire_t *ire_origin; 2217c793af95Ssangeeta ire_t *ire, *maybe_ire = NULL; 2218c793af95Ssangeeta 2219c793af95Ssangeeta rw_enter(&irb_ptr->irb_lock, RW_WRITER); 2220c793af95Ssangeeta ire_origin = irb_ptr->irb_rr_origin; 22210ad1ccddSsowmini if (ire_origin != NULL) { 2222c793af95Ssangeeta ire_origin = ire_origin->ire_next; 22230ad1ccddSsowmini IRE_FIND_NEXT_ORIGIN(ire_origin); 22240ad1ccddSsowmini } 2225c793af95Ssangeeta 2226c793af95Ssangeeta if (ire_origin == NULL) { 2227c793af95Ssangeeta /* 2228c793af95Ssangeeta * first time through routine, or we dropped off the end 2229c793af95Ssangeeta * of list. 2230c793af95Ssangeeta */ 2231c793af95Ssangeeta ire_origin = irb_ptr->irb_ire; 22320ad1ccddSsowmini IRE_FIND_NEXT_ORIGIN(ire_origin); 2233c793af95Ssangeeta } 2234c793af95Ssangeeta irb_ptr->irb_rr_origin = ire_origin; 2235c793af95Ssangeeta IRB_REFHOLD_LOCKED(irb_ptr); 2236c793af95Ssangeeta rw_exit(&irb_ptr->irb_lock); 2237c793af95Ssangeeta 22380ad1ccddSsowmini DTRACE_PROBE2(ire__rr__origin, (irb_t *), irb_ptr, 22390ad1ccddSsowmini (ire_t *), ire_origin); 22400ad1ccddSsowmini 2241c793af95Ssangeeta /* 2242c793af95Ssangeeta * Round-robin the routers list looking for a route that 2243c793af95Ssangeeta * matches the passed in parameters. 2244c793af95Ssangeeta * We start with the ire we found above and we walk the hash 2245c793af95Ssangeeta * list until we're back where we started. It doesn't matter if 2246c793af95Ssangeeta * routes are added or deleted by other threads - we know this 2247c793af95Ssangeeta * ire will stay in the list because we hold a reference on the 2248c793af95Ssangeeta * ire bucket. 2249c793af95Ssangeeta */ 2250c793af95Ssangeeta ire = ire_origin; 2251c793af95Ssangeeta while (ire != NULL) { 225227c48ed9Snordmark int match_flags = MATCH_IRE_TYPE | MATCH_IRE_SECATTR; 2253c793af95Ssangeeta ire_t *rire; 2254c793af95Ssangeeta 2255c793af95Ssangeeta if (ire->ire_marks & IRE_MARK_CONDEMNED) 2256c793af95Ssangeeta goto next_ire; 2257c793af95Ssangeeta 2258c793af95Ssangeeta if (!ire_match_args(ire, margs->ift_addr, (ipaddr_t)0, 2259c793af95Ssangeeta margs->ift_gateway, margs->ift_type, margs->ift_ipif, 2260c793af95Ssangeeta margs->ift_zoneid, margs->ift_ihandle, margs->ift_tsl, 22615b17e9bdSJon Anderson margs->ift_flags, NULL)) 2262c793af95Ssangeeta goto next_ire; 2263c793af95Ssangeeta 2264c793af95Ssangeeta if (ire->ire_type & IRE_INTERFACE) { 2265c793af95Ssangeeta /* 2266c793af95Ssangeeta * keep looking to see if there is a non-interface 2267c793af95Ssangeeta * default ire, but save this one as a last resort. 2268c793af95Ssangeeta */ 2269c793af95Ssangeeta if (maybe_ire == NULL) 2270c793af95Ssangeeta maybe_ire = ire; 2271c793af95Ssangeeta goto next_ire; 2272c793af95Ssangeeta } 2273c793af95Ssangeeta 2274c793af95Ssangeeta if (zoneid == ALL_ZONES) { 2275c793af95Ssangeeta IRE_REFHOLD(ire); 2276c793af95Ssangeeta IRB_REFRELE(irb_ptr); 2277c793af95Ssangeeta return (ire); 2278c793af95Ssangeeta } 2279c793af95Ssangeeta /* 228027c48ed9Snordmark * When we're in a non-global zone, we're only 2281c793af95Ssangeeta * interested in routers that are 2282c793af95Ssangeeta * reachable through ipifs within our zone. 2283c793af95Ssangeeta */ 2284*e11c3f44Smeem if (ire->ire_ipif != NULL) 2285*e11c3f44Smeem match_flags |= MATCH_IRE_ILL; 2286*e11c3f44Smeem 228727c48ed9Snordmark rire = ire_route_lookup(ire->ire_gateway_addr, 0, 0, 228827c48ed9Snordmark IRE_INTERFACE, ire->ire_ipif, NULL, zoneid, margs->ift_tsl, 2289f4b3ec61Sdh155122 match_flags, ipst); 2290c793af95Ssangeeta if (rire != NULL) { 2291c793af95Ssangeeta ire_refrele(rire); 2292c793af95Ssangeeta IRE_REFHOLD(ire); 2293c793af95Ssangeeta IRB_REFRELE(irb_ptr); 2294c793af95Ssangeeta return (ire); 2295c793af95Ssangeeta } 2296c793af95Ssangeeta next_ire: 2297c793af95Ssangeeta ire = (ire->ire_next ? ire->ire_next : irb_ptr->irb_ire); 2298c793af95Ssangeeta if (ire == ire_origin) 2299c793af95Ssangeeta break; 2300c793af95Ssangeeta } 2301c793af95Ssangeeta if (maybe_ire != NULL) 2302c793af95Ssangeeta IRE_REFHOLD(maybe_ire); 2303c793af95Ssangeeta IRB_REFRELE(irb_ptr); 2304c793af95Ssangeeta return (maybe_ire); 2305c793af95Ssangeeta } 23062679e103Ssowmini 23072679e103Ssowmini void 23082679e103Ssowmini irb_refhold_rn(struct radix_node *rn) 23092679e103Ssowmini { 23102679e103Ssowmini if ((rn->rn_flags & RNF_ROOT) == 0) 23112679e103Ssowmini IRB_REFHOLD(&((rt_t *)(rn))->rt_irb); 23122679e103Ssowmini } 23132679e103Ssowmini 23142679e103Ssowmini void 23152679e103Ssowmini irb_refrele_rn(struct radix_node *rn) 23162679e103Ssowmini { 23172679e103Ssowmini if ((rn->rn_flags & RNF_ROOT) == 0) 23182679e103Ssowmini irb_refrele_ftable(&((rt_t *)(rn))->rt_irb); 23192679e103Ssowmini } 2320