1caf43b02SWarner Losh /*- 282cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 382cd038dSYoshinobu Inoue * All rights reserved. 482cd038dSYoshinobu Inoue * 582cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 682cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 782cd038dSYoshinobu Inoue * are met: 882cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 982cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1082cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1282cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1382cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1482cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1582cd038dSYoshinobu Inoue * without specific prior written permission. 1682cd038dSYoshinobu Inoue * 1782cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1882cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1982cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2082cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2182cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2282cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2382cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2482cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2582cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2682cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2782cd038dSYoshinobu Inoue * SUCH DAMAGE. 28b48287a3SDavid E. O'Brien * 29b48287a3SDavid E. O'Brien * $KAME: icmp6.c,v 1.211 2001/04/04 05:56:20 itojun Exp $ 3082cd038dSYoshinobu Inoue */ 3182cd038dSYoshinobu Inoue 32caf43b02SWarner Losh /*- 3382cd038dSYoshinobu Inoue * Copyright (c) 1982, 1986, 1988, 1993 3482cd038dSYoshinobu Inoue * The Regents of the University of California. All rights reserved. 3582cd038dSYoshinobu Inoue * 3682cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 3782cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 3882cd038dSYoshinobu Inoue * are met: 3982cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 4082cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 4182cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 4282cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 4382cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 4482cd038dSYoshinobu Inoue * 4. Neither the name of the University nor the names of its contributors 4582cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 4682cd038dSYoshinobu Inoue * without specific prior written permission. 4782cd038dSYoshinobu Inoue * 4882cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 4982cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5082cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5182cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5282cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5382cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5482cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5582cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5682cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5782cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5882cd038dSYoshinobu Inoue * SUCH DAMAGE. 5982cd038dSYoshinobu Inoue * 6082cd038dSYoshinobu Inoue * @(#)ip_icmp.c 8.2 (Berkeley) 1/4/94 6182cd038dSYoshinobu Inoue */ 6282cd038dSYoshinobu Inoue 63b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 64b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 65b48287a3SDavid E. O'Brien 66686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 67686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 686a800098SYoshinobu Inoue #include "opt_ipsec.h" 6982cd038dSYoshinobu Inoue 7082cd038dSYoshinobu Inoue #include <sys/param.h> 71960ed29cSSeigo Tanimura #include <sys/domain.h> 7276ca6f88SJamie Gritton #include <sys/jail.h> 73960ed29cSSeigo Tanimura #include <sys/kernel.h> 74960ed29cSSeigo Tanimura #include <sys/lock.h> 7533841545SHajimu UMEMOTO #include <sys/malloc.h> 7682cd038dSYoshinobu Inoue #include <sys/mbuf.h> 77530c0060SRobert Watson #include <sys/proc.h> 7882cd038dSYoshinobu Inoue #include <sys/protosw.h> 79960ed29cSSeigo Tanimura #include <sys/signalvar.h> 8082cd038dSYoshinobu Inoue #include <sys/socket.h> 8182cd038dSYoshinobu Inoue #include <sys/socketvar.h> 82960ed29cSSeigo Tanimura #include <sys/sx.h> 8382cd038dSYoshinobu Inoue #include <sys/syslog.h> 84960ed29cSSeigo Tanimura #include <sys/systm.h> 85960ed29cSSeigo Tanimura #include <sys/time.h> 8682cd038dSYoshinobu Inoue 8782cd038dSYoshinobu Inoue #include <net/if.h> 8882cd038dSYoshinobu Inoue #include <net/if_dl.h> 896e6b3f7cSQing Li #include <net/if_llatbl.h> 9082cd038dSYoshinobu Inoue #include <net/if_types.h> 91960ed29cSSeigo Tanimura #include <net/route.h> 924b79449eSBjoern A. Zeeb #include <net/vnet.h> 9382cd038dSYoshinobu Inoue 9482cd038dSYoshinobu Inoue #include <netinet/in.h> 95960ed29cSSeigo Tanimura #include <netinet/in_pcb.h> 9682cd038dSYoshinobu Inoue #include <netinet/in_var.h> 97686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 98686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 9997d8d152SAndre Oppermann #include <netinet/tcp_var.h> 1004b79449eSBjoern A. Zeeb 10182cd038dSYoshinobu Inoue #include <netinet6/in6_ifattach.h> 102960ed29cSSeigo Tanimura #include <netinet6/in6_pcb.h> 10382cd038dSYoshinobu Inoue #include <netinet6/ip6protosw.h> 104960ed29cSSeigo Tanimura #include <netinet6/ip6_var.h> 105a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 106960ed29cSSeigo Tanimura #include <netinet6/mld6_var.h> 107960ed29cSSeigo Tanimura #include <netinet6/nd6.h> 1081db8d1f8SAna Kukec #include <netinet6/send.h> 10982cd038dSYoshinobu Inoue 110b2630c29SGeorge V. Neville-Neil #ifdef IPSEC 111b9234fafSSam Leffler #include <netipsec/ipsec.h> 112b9234fafSSam Leffler #include <netipsec/key.h> 113b9234fafSSam Leffler #endif 114b9234fafSSam Leffler 11582cd038dSYoshinobu Inoue extern struct domain inet6domain; 11697021c24SMarko Zec 11782cea7e6SBjoern A. Zeeb VNET_DEFINE(struct icmp6stat, icmp6stat); 11882cea7e6SBjoern A. Zeeb 119eddfbb76SRobert Watson VNET_DECLARE(struct inpcbinfo, ripcbinfo); 120eddfbb76SRobert Watson VNET_DECLARE(struct inpcbhead, ripcb); 121eddfbb76SRobert Watson VNET_DECLARE(int, icmp6errppslim); 1223e288e62SDimitry Andric static VNET_DEFINE(int, icmp6errpps_count) = 0; 1233e288e62SDimitry Andric static VNET_DEFINE(struct timeval, icmp6errppslim_last); 124eddfbb76SRobert Watson VNET_DECLARE(int, icmp6_nodeinfo); 12582cd038dSYoshinobu Inoue 1261e77c105SRobert Watson #define V_ripcbinfo VNET(ripcbinfo) 1271e77c105SRobert Watson #define V_ripcb VNET(ripcb) 1281e77c105SRobert Watson #define V_icmp6errppslim VNET(icmp6errppslim) 1291e77c105SRobert Watson #define V_icmp6errpps_count VNET(icmp6errpps_count) 1301e77c105SRobert Watson #define V_icmp6errppslim_last VNET(icmp6errppslim_last) 13182cea7e6SBjoern A. Zeeb #define V_icmp6_nodeinfo VNET(icmp6_nodeinfo) 13244e33a07SMarko Zec 1339233d8f3SDavid E. O'Brien static void icmp6_errcount(struct icmp6errstat *, int, int); 1349233d8f3SDavid E. O'Brien static int icmp6_rip6_input(struct mbuf **, int); 1359233d8f3SDavid E. O'Brien static int icmp6_ratelimit(const struct in6_addr *, const int, const int); 13682cd038dSYoshinobu Inoue static const char *icmp6_redirect_diag __P((struct in6_addr *, 137686cdd19SJun-ichiro itojun Hagino struct in6_addr *, struct in6_addr *)); 1389233d8f3SDavid E. O'Brien static struct mbuf *ni6_input(struct mbuf *, int); 1399233d8f3SDavid E. O'Brien static struct mbuf *ni6_nametodns(const char *, int, int); 1409233d8f3SDavid E. O'Brien static int ni6_dnsmatch(const char *, int, const char *, int); 14182cd038dSYoshinobu Inoue static int ni6_addrs __P((struct icmp6_nodeinfo *, struct mbuf *, 142c66b5feaSHajimu UMEMOTO struct ifnet **, struct in6_addr *)); 143686cdd19SJun-ichiro itojun Hagino static int ni6_store_addrs __P((struct icmp6_nodeinfo *, struct icmp6_nodeinfo *, 14482cd038dSYoshinobu Inoue struct ifnet *, int)); 1459233d8f3SDavid E. O'Brien static int icmp6_notify_error(struct mbuf **, int, int, int); 14682cd038dSYoshinobu Inoue 147315e3e38SRobert Watson /* 148315e3e38SRobert Watson * Kernel module interface for updating icmp6stat. The argument is an index 149315e3e38SRobert Watson * into icmp6stat treated as an array of u_quad_t. While this encodes the 150315e3e38SRobert Watson * general layout of icmp6stat into the caller, it doesn't encode its 151315e3e38SRobert Watson * location, so that future changes to add, for example, per-CPU stats 152315e3e38SRobert Watson * support won't cause binary compatibility problems for kernel modules. 153315e3e38SRobert Watson */ 154315e3e38SRobert Watson void 155315e3e38SRobert Watson kmod_icmp6stat_inc(int statnum) 156315e3e38SRobert Watson { 157315e3e38SRobert Watson 158315e3e38SRobert Watson (*((u_quad_t *)&V_icmp6stat + statnum))++; 159315e3e38SRobert Watson } 160315e3e38SRobert Watson 161686cdd19SJun-ichiro itojun Hagino static void 1621272577eSXin LI icmp6_errcount(struct icmp6errstat *stat, int type, int code) 163686cdd19SJun-ichiro itojun Hagino { 164686cdd19SJun-ichiro itojun Hagino switch (type) { 165686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH: 166686cdd19SJun-ichiro itojun Hagino switch (code) { 167686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_NOROUTE: 168686cdd19SJun-ichiro itojun Hagino stat->icp6errs_dst_unreach_noroute++; 169686cdd19SJun-ichiro itojun Hagino return; 170686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADMIN: 171686cdd19SJun-ichiro itojun Hagino stat->icp6errs_dst_unreach_admin++; 172686cdd19SJun-ichiro itojun Hagino return; 173686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_BEYONDSCOPE: 174686cdd19SJun-ichiro itojun Hagino stat->icp6errs_dst_unreach_beyondscope++; 175686cdd19SJun-ichiro itojun Hagino return; 176686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADDR: 177686cdd19SJun-ichiro itojun Hagino stat->icp6errs_dst_unreach_addr++; 178686cdd19SJun-ichiro itojun Hagino return; 179686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_NOPORT: 180686cdd19SJun-ichiro itojun Hagino stat->icp6errs_dst_unreach_noport++; 181686cdd19SJun-ichiro itojun Hagino return; 182686cdd19SJun-ichiro itojun Hagino } 183686cdd19SJun-ichiro itojun Hagino break; 184686cdd19SJun-ichiro itojun Hagino case ICMP6_PACKET_TOO_BIG: 185686cdd19SJun-ichiro itojun Hagino stat->icp6errs_packet_too_big++; 186686cdd19SJun-ichiro itojun Hagino return; 187686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEEDED: 188686cdd19SJun-ichiro itojun Hagino switch (code) { 189686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEED_TRANSIT: 190686cdd19SJun-ichiro itojun Hagino stat->icp6errs_time_exceed_transit++; 191686cdd19SJun-ichiro itojun Hagino return; 192686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEED_REASSEMBLY: 193686cdd19SJun-ichiro itojun Hagino stat->icp6errs_time_exceed_reassembly++; 194686cdd19SJun-ichiro itojun Hagino return; 195686cdd19SJun-ichiro itojun Hagino } 196686cdd19SJun-ichiro itojun Hagino break; 197686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAM_PROB: 198686cdd19SJun-ichiro itojun Hagino switch (code) { 199686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_HEADER: 200686cdd19SJun-ichiro itojun Hagino stat->icp6errs_paramprob_header++; 201686cdd19SJun-ichiro itojun Hagino return; 202686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_NEXTHEADER: 203686cdd19SJun-ichiro itojun Hagino stat->icp6errs_paramprob_nextheader++; 204686cdd19SJun-ichiro itojun Hagino return; 205686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_OPTION: 206686cdd19SJun-ichiro itojun Hagino stat->icp6errs_paramprob_option++; 207686cdd19SJun-ichiro itojun Hagino return; 208686cdd19SJun-ichiro itojun Hagino } 209686cdd19SJun-ichiro itojun Hagino break; 210686cdd19SJun-ichiro itojun Hagino case ND_REDIRECT: 211686cdd19SJun-ichiro itojun Hagino stat->icp6errs_redirect++; 212686cdd19SJun-ichiro itojun Hagino return; 213686cdd19SJun-ichiro itojun Hagino } 214686cdd19SJun-ichiro itojun Hagino stat->icp6errs_unknown++; 215686cdd19SJun-ichiro itojun Hagino } 216686cdd19SJun-ichiro itojun Hagino 21782cd038dSYoshinobu Inoue /* 218a1f7e5f8SHajimu UMEMOTO * A wrapper function for icmp6_error() necessary when the erroneous packet 219a1f7e5f8SHajimu UMEMOTO * may not contain enough scope zone information. 220a1f7e5f8SHajimu UMEMOTO */ 221a1f7e5f8SHajimu UMEMOTO void 2221272577eSXin LI icmp6_error2(struct mbuf *m, int type, int code, int param, 2231272577eSXin LI struct ifnet *ifp) 224a1f7e5f8SHajimu UMEMOTO { 225a1f7e5f8SHajimu UMEMOTO struct ip6_hdr *ip6; 226a1f7e5f8SHajimu UMEMOTO 227a1f7e5f8SHajimu UMEMOTO if (ifp == NULL) 228a1f7e5f8SHajimu UMEMOTO return; 229a1f7e5f8SHajimu UMEMOTO 230a1f7e5f8SHajimu UMEMOTO #ifndef PULLDOWN_TEST 231a1f7e5f8SHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), ); 232a1f7e5f8SHajimu UMEMOTO #else 233a1f7e5f8SHajimu UMEMOTO if (m->m_len < sizeof(struct ip6_hdr)) { 234a1f7e5f8SHajimu UMEMOTO m = m_pullup(m, sizeof(struct ip6_hdr)); 235a1f7e5f8SHajimu UMEMOTO if (m == NULL) 236a1f7e5f8SHajimu UMEMOTO return; 237a1f7e5f8SHajimu UMEMOTO } 238a1f7e5f8SHajimu UMEMOTO #endif 239a1f7e5f8SHajimu UMEMOTO 240a1f7e5f8SHajimu UMEMOTO ip6 = mtod(m, struct ip6_hdr *); 241a1f7e5f8SHajimu UMEMOTO 242a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&ip6->ip6_src, ifp, NULL) != 0) 243a1f7e5f8SHajimu UMEMOTO return; 244a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&ip6->ip6_dst, ifp, NULL) != 0) 245a1f7e5f8SHajimu UMEMOTO return; 246a1f7e5f8SHajimu UMEMOTO 247a1f7e5f8SHajimu UMEMOTO icmp6_error(m, type, code, param); 248a1f7e5f8SHajimu UMEMOTO } 249a1f7e5f8SHajimu UMEMOTO 250a1f7e5f8SHajimu UMEMOTO /* 25182cd038dSYoshinobu Inoue * Generate an error packet of type error in response to bad IP6 packet. 25282cd038dSYoshinobu Inoue */ 25382cd038dSYoshinobu Inoue void 2541272577eSXin LI icmp6_error(struct mbuf *m, int type, int code, int param) 25582cd038dSYoshinobu Inoue { 25682cd038dSYoshinobu Inoue struct ip6_hdr *oip6, *nip6; 25782cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 258686cdd19SJun-ichiro itojun Hagino u_int preplen; 25982cd038dSYoshinobu Inoue int off; 260686cdd19SJun-ichiro itojun Hagino int nxt; 26182cd038dSYoshinobu Inoue 262e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_error); 26382cd038dSYoshinobu Inoue 264686cdd19SJun-ichiro itojun Hagino /* count per-type-code statistics */ 265603724d3SBjoern A. Zeeb icmp6_errcount(&V_icmp6stat.icp6s_outerrhist, type, code); 26682cd038dSYoshinobu Inoue 267686cdd19SJun-ichiro itojun Hagino #ifdef M_DECRYPTED /*not openbsd*/ 268686cdd19SJun-ichiro itojun Hagino if (m->m_flags & M_DECRYPTED) { 269e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_canterror); 270686cdd19SJun-ichiro itojun Hagino goto freeit; 271686cdd19SJun-ichiro itojun Hagino } 272686cdd19SJun-ichiro itojun Hagino #endif 273686cdd19SJun-ichiro itojun Hagino 274686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 275686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), ); 276686cdd19SJun-ichiro itojun Hagino #else 277686cdd19SJun-ichiro itojun Hagino if (m->m_len < sizeof(struct ip6_hdr)) { 278686cdd19SJun-ichiro itojun Hagino m = m_pullup(m, sizeof(struct ip6_hdr)); 279686cdd19SJun-ichiro itojun Hagino if (m == NULL) 280686cdd19SJun-ichiro itojun Hagino return; 281686cdd19SJun-ichiro itojun Hagino } 282686cdd19SJun-ichiro itojun Hagino #endif 28382cd038dSYoshinobu Inoue oip6 = mtod(m, struct ip6_hdr *); 28482cd038dSYoshinobu Inoue 28582cd038dSYoshinobu Inoue /* 286f95d4633SHajimu UMEMOTO * If the destination address of the erroneous packet is a multicast 287f95d4633SHajimu UMEMOTO * address, or the packet was sent using link-layer multicast, 288f95d4633SHajimu UMEMOTO * we should basically suppress sending an error (RFC 2463, Section 289f95d4633SHajimu UMEMOTO * 2.4). 290f95d4633SHajimu UMEMOTO * We have two exceptions (the item e.2 in that section): 2911767c520SBjoern A. Zeeb * - the Packet Too Big message can be sent for path MTU discovery. 292f95d4633SHajimu UMEMOTO * - the Parameter Problem Message that can be allowed an icmp6 error 293f95d4633SHajimu UMEMOTO * in the option type field. This check has been done in 294f95d4633SHajimu UMEMOTO * ip6_unknown_opt(), so we can just check the type and code. 29582cd038dSYoshinobu Inoue */ 29682cd038dSYoshinobu Inoue if ((m->m_flags & (M_BCAST|M_MCAST) || 29782cd038dSYoshinobu Inoue IN6_IS_ADDR_MULTICAST(&oip6->ip6_dst)) && 29882cd038dSYoshinobu Inoue (type != ICMP6_PACKET_TOO_BIG && 29982cd038dSYoshinobu Inoue (type != ICMP6_PARAM_PROB || 30082cd038dSYoshinobu Inoue code != ICMP6_PARAMPROB_OPTION))) 30182cd038dSYoshinobu Inoue goto freeit; 30282cd038dSYoshinobu Inoue 303f95d4633SHajimu UMEMOTO /* 304f95d4633SHajimu UMEMOTO * RFC 2463, 2.4 (e.5): source address check. 305f95d4633SHajimu UMEMOTO * XXX: the case of anycast source? 306f95d4633SHajimu UMEMOTO */ 30782cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(&oip6->ip6_src) || 30882cd038dSYoshinobu Inoue IN6_IS_ADDR_MULTICAST(&oip6->ip6_src)) 30982cd038dSYoshinobu Inoue goto freeit; 31082cd038dSYoshinobu Inoue 31182cd038dSYoshinobu Inoue /* 312686cdd19SJun-ichiro itojun Hagino * If we are about to send ICMPv6 against ICMPv6 error/redirect, 313686cdd19SJun-ichiro itojun Hagino * don't do it. 31482cd038dSYoshinobu Inoue */ 315686cdd19SJun-ichiro itojun Hagino nxt = -1; 316686cdd19SJun-ichiro itojun Hagino off = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nxt); 317686cdd19SJun-ichiro itojun Hagino if (off >= 0 && nxt == IPPROTO_ICMPV6) { 31882cd038dSYoshinobu Inoue struct icmp6_hdr *icp; 31982cd038dSYoshinobu Inoue 320686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 32182cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, 0, off + sizeof(struct icmp6_hdr), ); 32282cd038dSYoshinobu Inoue icp = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 323686cdd19SJun-ichiro itojun Hagino #else 324686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icp, struct icmp6_hdr *, m, off, 325686cdd19SJun-ichiro itojun Hagino sizeof(*icp)); 326686cdd19SJun-ichiro itojun Hagino if (icp == NULL) { 327e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 328686cdd19SJun-ichiro itojun Hagino return; 329686cdd19SJun-ichiro itojun Hagino } 330686cdd19SJun-ichiro itojun Hagino #endif 331686cdd19SJun-ichiro itojun Hagino if (icp->icmp6_type < ICMP6_ECHO_REQUEST || 332686cdd19SJun-ichiro itojun Hagino icp->icmp6_type == ND_REDIRECT) { 33382cd038dSYoshinobu Inoue /* 33482cd038dSYoshinobu Inoue * ICMPv6 error 33582cd038dSYoshinobu Inoue * Special case: for redirect (which is 33682cd038dSYoshinobu Inoue * informational) we must not send icmp6 error. 33782cd038dSYoshinobu Inoue */ 338e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_canterror); 33982cd038dSYoshinobu Inoue goto freeit; 34082cd038dSYoshinobu Inoue } else { 341686cdd19SJun-ichiro itojun Hagino /* ICMPv6 informational - send the error */ 34282cd038dSYoshinobu Inoue } 343686cdd19SJun-ichiro itojun Hagino } else { 344686cdd19SJun-ichiro itojun Hagino /* non-ICMPv6 - send the error */ 34582cd038dSYoshinobu Inoue } 34682cd038dSYoshinobu Inoue 34782cd038dSYoshinobu Inoue oip6 = mtod(m, struct ip6_hdr *); /* adjust pointer */ 34882cd038dSYoshinobu Inoue 34982cd038dSYoshinobu Inoue /* Finally, do rate limitation check. */ 35082cd038dSYoshinobu Inoue if (icmp6_ratelimit(&oip6->ip6_src, type, code)) { 351e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_toofreq); 35282cd038dSYoshinobu Inoue goto freeit; 35382cd038dSYoshinobu Inoue } 35482cd038dSYoshinobu Inoue 35582cd038dSYoshinobu Inoue /* 35682cd038dSYoshinobu Inoue * OK, ICMP6 can be generated. 35782cd038dSYoshinobu Inoue */ 35882cd038dSYoshinobu Inoue 35982cd038dSYoshinobu Inoue if (m->m_pkthdr.len >= ICMPV6_PLD_MAXLEN) 36082cd038dSYoshinobu Inoue m_adj(m, ICMPV6_PLD_MAXLEN - m->m_pkthdr.len); 36182cd038dSYoshinobu Inoue 362686cdd19SJun-ichiro itojun Hagino preplen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 363a163d034SWarner Losh M_PREPEND(m, preplen, M_DONTWAIT); 364686cdd19SJun-ichiro itojun Hagino if (m && m->m_len < preplen) 365686cdd19SJun-ichiro itojun Hagino m = m_pullup(m, preplen); 36682cd038dSYoshinobu Inoue if (m == NULL) { 36733841545SHajimu UMEMOTO nd6log((LOG_DEBUG, "ENOBUFS in icmp6_error %d\n", __LINE__)); 36882cd038dSYoshinobu Inoue return; 36982cd038dSYoshinobu Inoue } 37082cd038dSYoshinobu Inoue 37182cd038dSYoshinobu Inoue nip6 = mtod(m, struct ip6_hdr *); 37282cd038dSYoshinobu Inoue nip6->ip6_src = oip6->ip6_src; 37382cd038dSYoshinobu Inoue nip6->ip6_dst = oip6->ip6_dst; 37482cd038dSYoshinobu Inoue 3759a4f9608SHajimu UMEMOTO in6_clearscope(&oip6->ip6_src); 3769a4f9608SHajimu UMEMOTO in6_clearscope(&oip6->ip6_dst); 37782cd038dSYoshinobu Inoue 37882cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(nip6 + 1); 37982cd038dSYoshinobu Inoue icmp6->icmp6_type = type; 38082cd038dSYoshinobu Inoue icmp6->icmp6_code = code; 38182cd038dSYoshinobu Inoue icmp6->icmp6_pptr = htonl((u_int32_t)param); 38282cd038dSYoshinobu Inoue 38333841545SHajimu UMEMOTO /* 38433841545SHajimu UMEMOTO * icmp6_reflect() is designed to be in the input path. 385cd0fdcf7SHajimu UMEMOTO * icmp6_error() can be called from both input and output path, 38633841545SHajimu UMEMOTO * and if we are in output path rcvif could contain bogus value. 38733841545SHajimu UMEMOTO * clear m->m_pkthdr.rcvif for safety, we should have enough scope 38833841545SHajimu UMEMOTO * information in ip header (nip6). 38933841545SHajimu UMEMOTO */ 39033841545SHajimu UMEMOTO m->m_pkthdr.rcvif = NULL; 39133841545SHajimu UMEMOTO 392e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[type]); 39382cd038dSYoshinobu Inoue icmp6_reflect(m, sizeof(struct ip6_hdr)); /* header order: IPv6 - ICMPv6 */ 394686cdd19SJun-ichiro itojun Hagino 395686cdd19SJun-ichiro itojun Hagino return; 396686cdd19SJun-ichiro itojun Hagino 397686cdd19SJun-ichiro itojun Hagino freeit: 398686cdd19SJun-ichiro itojun Hagino /* 399cd0fdcf7SHajimu UMEMOTO * If we can't tell whether or not we can generate ICMP6, free it. 400686cdd19SJun-ichiro itojun Hagino */ 401686cdd19SJun-ichiro itojun Hagino m_freem(m); 40282cd038dSYoshinobu Inoue } 40382cd038dSYoshinobu Inoue 40482cd038dSYoshinobu Inoue /* 40582cd038dSYoshinobu Inoue * Process a received ICMP6 message. 40682cd038dSYoshinobu Inoue */ 40782cd038dSYoshinobu Inoue int 4081272577eSXin LI icmp6_input(struct mbuf **mp, int *offp, int proto) 40982cd038dSYoshinobu Inoue { 41082cd038dSYoshinobu Inoue struct mbuf *m = *mp, *n; 41129dc7bc6SBruce M Simpson struct ifnet *ifp; 41282cd038dSYoshinobu Inoue struct ip6_hdr *ip6, *nip6; 41382cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6, *nicmp6; 41482cd038dSYoshinobu Inoue int off = *offp; 41582cd038dSYoshinobu Inoue int icmp6len = m->m_pkthdr.len - *offp; 41682cd038dSYoshinobu Inoue int code, sum, noff; 4171d54aa3bSBjoern A. Zeeb char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN]; 4181db8d1f8SAna Kukec int ip6len, error; 41982cd038dSYoshinobu Inoue 42029dc7bc6SBruce M Simpson ifp = m->m_pkthdr.rcvif; 42129dc7bc6SBruce M Simpson 422686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 42382cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_hdr), IPPROTO_DONE); 42482cd038dSYoshinobu Inoue /* m might change if M_LOOP. So, call mtod after this */ 425686cdd19SJun-ichiro itojun Hagino #endif 42682cd038dSYoshinobu Inoue 42782cd038dSYoshinobu Inoue /* 42882cd038dSYoshinobu Inoue * Locate icmp6 structure in mbuf, and check 42982cd038dSYoshinobu Inoue * that not corrupted and of at least minimum length 43082cd038dSYoshinobu Inoue */ 43182cd038dSYoshinobu Inoue 43282cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 4331db8d1f8SAna Kukec ip6len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen); 43482cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct icmp6_hdr)) { 435e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 43682cd038dSYoshinobu Inoue goto freeit; 43782cd038dSYoshinobu Inoue } 43882cd038dSYoshinobu Inoue 43982cd038dSYoshinobu Inoue /* 44033cde130SBruce M Simpson * Check multicast group membership. 44133cde130SBruce M Simpson * Note: SSM filters are not applied for ICMPv6 traffic. 44233cde130SBruce M Simpson */ 44333cde130SBruce M Simpson if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 44433cde130SBruce M Simpson struct in6_multi *inm; 44533cde130SBruce M Simpson 44633cde130SBruce M Simpson inm = in6m_lookup(ifp, &ip6->ip6_dst); 44733cde130SBruce M Simpson if (inm == NULL) { 44833cde130SBruce M Simpson IP6STAT_INC(ip6s_notmember); 44933cde130SBruce M Simpson in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); 45033cde130SBruce M Simpson goto freeit; 45133cde130SBruce M Simpson } 45233cde130SBruce M Simpson } 45333cde130SBruce M Simpson 45433cde130SBruce M Simpson /* 45582cd038dSYoshinobu Inoue * calculate the checksum 45682cd038dSYoshinobu Inoue */ 457686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 45882cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off); 459686cdd19SJun-ichiro itojun Hagino #else 460686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6)); 461686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 462e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 463686cdd19SJun-ichiro itojun Hagino return IPPROTO_DONE; 464686cdd19SJun-ichiro itojun Hagino } 465686cdd19SJun-ichiro itojun Hagino #endif 46682cd038dSYoshinobu Inoue code = icmp6->icmp6_code; 46782cd038dSYoshinobu Inoue 46882cd038dSYoshinobu Inoue if ((sum = in6_cksum(m, IPPROTO_ICMPV6, off, icmp6len)) != 0) { 46933841545SHajimu UMEMOTO nd6log((LOG_ERR, 47082cd038dSYoshinobu Inoue "ICMP6 checksum error(%d|%x) %s\n", 4711d54aa3bSBjoern A. Zeeb icmp6->icmp6_type, sum, 4721d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6bufs, &ip6->ip6_src))); 473e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_checksum); 47482cd038dSYoshinobu Inoue goto freeit; 47582cd038dSYoshinobu Inoue } 47682cd038dSYoshinobu Inoue 4779494d596SBrooks Davis if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 47882cd038dSYoshinobu Inoue /* 47982cd038dSYoshinobu Inoue * Deliver very specific ICMP6 type only. 480cd0fdcf7SHajimu UMEMOTO * This is important to deliver TOOBIG. Otherwise PMTUD 48182cd038dSYoshinobu Inoue * will not work. 48282cd038dSYoshinobu Inoue */ 48382cd038dSYoshinobu Inoue switch (icmp6->icmp6_type) { 48482cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH: 48582cd038dSYoshinobu Inoue case ICMP6_PACKET_TOO_BIG: 48682cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEEDED: 48782cd038dSYoshinobu Inoue break; 48882cd038dSYoshinobu Inoue default: 48982cd038dSYoshinobu Inoue goto freeit; 49082cd038dSYoshinobu Inoue } 49182cd038dSYoshinobu Inoue } 49282cd038dSYoshinobu Inoue 493e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_inhist[icmp6->icmp6_type]); 49429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_msg); 49582cd038dSYoshinobu Inoue if (icmp6->icmp6_type < ICMP6_INFOMSG_MASK) 49629dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_error); 49782cd038dSYoshinobu Inoue 49882cd038dSYoshinobu Inoue switch (icmp6->icmp6_type) { 49982cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH: 50029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_dstunreach); 50182cd038dSYoshinobu Inoue switch (code) { 50282cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_NOROUTE: 50382cd038dSYoshinobu Inoue code = PRC_UNREACH_NET; 50482cd038dSYoshinobu Inoue break; 50582cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_ADMIN: 50629dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_adminprohib); 507686cdd19SJun-ichiro itojun Hagino code = PRC_UNREACH_PROTOCOL; /* is this a good code? */ 50882cd038dSYoshinobu Inoue break; 509686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADDR: 510686cdd19SJun-ichiro itojun Hagino code = PRC_HOSTDEAD; 511686cdd19SJun-ichiro itojun Hagino break; 512686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_BEYONDSCOPE: 513686cdd19SJun-ichiro itojun Hagino /* I mean "source address was incorrect." */ 514686cdd19SJun-ichiro itojun Hagino code = PRC_PARAMPROB; 515686cdd19SJun-ichiro itojun Hagino break; 51682cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_NOPORT: 51782cd038dSYoshinobu Inoue code = PRC_UNREACH_PORT; 51882cd038dSYoshinobu Inoue break; 51982cd038dSYoshinobu Inoue default: 52082cd038dSYoshinobu Inoue goto badcode; 52182cd038dSYoshinobu Inoue } 52282cd038dSYoshinobu Inoue goto deliver; 52382cd038dSYoshinobu Inoue break; 52482cd038dSYoshinobu Inoue 52582cd038dSYoshinobu Inoue case ICMP6_PACKET_TOO_BIG: 52629dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_pkttoobig); 52782cd038dSYoshinobu Inoue 528aaff9927SHajimu UMEMOTO /* validation is made in icmp6_mtudisc_update */ 529aaff9927SHajimu UMEMOTO 53082cd038dSYoshinobu Inoue code = PRC_MSGSIZE; 53182cd038dSYoshinobu Inoue 532686cdd19SJun-ichiro itojun Hagino /* 533686cdd19SJun-ichiro itojun Hagino * Updating the path MTU will be done after examining 534686cdd19SJun-ichiro itojun Hagino * intermediate extension headers. 535686cdd19SJun-ichiro itojun Hagino */ 53682cd038dSYoshinobu Inoue goto deliver; 53782cd038dSYoshinobu Inoue break; 53882cd038dSYoshinobu Inoue 53982cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEEDED: 54029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_timeexceed); 54182cd038dSYoshinobu Inoue switch (code) { 54282cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEED_TRANSIT: 5432ce62dceSSUZUKI Shinsuke code = PRC_TIMXCEED_INTRANS; 5442ce62dceSSUZUKI Shinsuke break; 54582cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEED_REASSEMBLY: 5462ce62dceSSUZUKI Shinsuke code = PRC_TIMXCEED_REASS; 54782cd038dSYoshinobu Inoue break; 54882cd038dSYoshinobu Inoue default: 54982cd038dSYoshinobu Inoue goto badcode; 55082cd038dSYoshinobu Inoue } 55182cd038dSYoshinobu Inoue goto deliver; 55282cd038dSYoshinobu Inoue break; 55382cd038dSYoshinobu Inoue 55482cd038dSYoshinobu Inoue case ICMP6_PARAM_PROB: 55529dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_paramprob); 55682cd038dSYoshinobu Inoue switch (code) { 55782cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_NEXTHEADER: 55882cd038dSYoshinobu Inoue code = PRC_UNREACH_PROTOCOL; 55982cd038dSYoshinobu Inoue break; 56082cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_HEADER: 56182cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_OPTION: 56282cd038dSYoshinobu Inoue code = PRC_PARAMPROB; 56382cd038dSYoshinobu Inoue break; 56482cd038dSYoshinobu Inoue default: 56582cd038dSYoshinobu Inoue goto badcode; 56682cd038dSYoshinobu Inoue } 56782cd038dSYoshinobu Inoue goto deliver; 56882cd038dSYoshinobu Inoue break; 56982cd038dSYoshinobu Inoue 57082cd038dSYoshinobu Inoue case ICMP6_ECHO_REQUEST: 57129dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_echo); 57282cd038dSYoshinobu Inoue if (code != 0) 57382cd038dSYoshinobu Inoue goto badcode; 57482cd038dSYoshinobu Inoue if ((n = m_copy(m, 0, M_COPYALL)) == NULL) { 57582cd038dSYoshinobu Inoue /* Give up remote */ 57682cd038dSYoshinobu Inoue break; 57782cd038dSYoshinobu Inoue } 578686cdd19SJun-ichiro itojun Hagino if ((n->m_flags & M_EXT) != 0 579686cdd19SJun-ichiro itojun Hagino || n->m_len < off + sizeof(struct icmp6_hdr)) { 58082cd038dSYoshinobu Inoue struct mbuf *n0 = n; 581686cdd19SJun-ichiro itojun Hagino const int maxlen = sizeof(*nip6) + sizeof(*nicmp6); 5822268ca47SSam Leffler int n0len; 58382cd038dSYoshinobu Inoue 584a163d034SWarner Losh MGETHDR(n, M_DONTWAIT, n0->m_type); 5855c47350dSSam Leffler n0len = n0->m_pkthdr.len; /* save for use below */ 5865c47350dSSam Leffler if (n) 5875c47350dSSam Leffler M_MOVE_PKTHDR(n, n0); 588686cdd19SJun-ichiro itojun Hagino if (n && maxlen >= MHLEN) { 589a163d034SWarner Losh MCLGET(n, M_DONTWAIT); 590686cdd19SJun-ichiro itojun Hagino if ((n->m_flags & M_EXT) == 0) { 591686cdd19SJun-ichiro itojun Hagino m_free(n); 592686cdd19SJun-ichiro itojun Hagino n = NULL; 593686cdd19SJun-ichiro itojun Hagino } 594686cdd19SJun-ichiro itojun Hagino } 59582cd038dSYoshinobu Inoue if (n == NULL) { 59682cd038dSYoshinobu Inoue /* Give up remote */ 59782cd038dSYoshinobu Inoue m_freem(n0); 59882cd038dSYoshinobu Inoue break; 59982cd038dSYoshinobu Inoue } 60082cd038dSYoshinobu Inoue /* 60182cd038dSYoshinobu Inoue * Copy IPv6 and ICMPv6 only. 60282cd038dSYoshinobu Inoue */ 60382cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 60482cd038dSYoshinobu Inoue bcopy(ip6, nip6, sizeof(struct ip6_hdr)); 60582cd038dSYoshinobu Inoue nicmp6 = (struct icmp6_hdr *)(nip6 + 1); 60682cd038dSYoshinobu Inoue bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr)); 60782cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 6082268ca47SSam Leffler /* new mbuf contains only ipv6+icmpv6 headers */ 6092268ca47SSam Leffler n->m_len = noff + sizeof(struct icmp6_hdr); 610686cdd19SJun-ichiro itojun Hagino /* 611686cdd19SJun-ichiro itojun Hagino * Adjust mbuf. ip6_plen will be adjusted in 612686cdd19SJun-ichiro itojun Hagino * ip6_output(). 613686cdd19SJun-ichiro itojun Hagino */ 614686cdd19SJun-ichiro itojun Hagino m_adj(n0, off + sizeof(struct icmp6_hdr)); 6152268ca47SSam Leffler /* recalculate complete packet size */ 6162268ca47SSam Leffler n->m_pkthdr.len = n0len + (noff - off); 617686cdd19SJun-ichiro itojun Hagino n->m_next = n0; 61882cd038dSYoshinobu Inoue } else { 61982cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 6206a550ab3SHajimu UMEMOTO IP6_EXTHDR_GET(nicmp6, struct icmp6_hdr *, n, off, 6216a550ab3SHajimu UMEMOTO sizeof(*nicmp6)); 62282cd038dSYoshinobu Inoue noff = off; 62382cd038dSYoshinobu Inoue } 62482cd038dSYoshinobu Inoue nicmp6->icmp6_type = ICMP6_ECHO_REPLY; 62582cd038dSYoshinobu Inoue nicmp6->icmp6_code = 0; 62682cd038dSYoshinobu Inoue if (n) { 627e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_reflect); 628e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ICMP6_ECHO_REPLY]); 62982cd038dSYoshinobu Inoue icmp6_reflect(n, noff); 63082cd038dSYoshinobu Inoue } 63182cd038dSYoshinobu Inoue break; 63282cd038dSYoshinobu Inoue 63382cd038dSYoshinobu Inoue case ICMP6_ECHO_REPLY: 63429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_echoreply); 63582cd038dSYoshinobu Inoue if (code != 0) 63682cd038dSYoshinobu Inoue goto badcode; 63782cd038dSYoshinobu Inoue break; 63882cd038dSYoshinobu Inoue 63981170631SHajimu UMEMOTO case MLD_LISTENER_QUERY: 64081170631SHajimu UMEMOTO case MLD_LISTENER_REPORT: 64133cde130SBruce M Simpson case MLD_LISTENER_DONE: 64233cde130SBruce M Simpson case MLDV2_LISTENER_REPORT: 64333cde130SBruce M Simpson /* 64429dc7bc6SBruce M Simpson * Drop MLD traffic which is not link-local, has a hop limit 64529dc7bc6SBruce M Simpson * of greater than 1 hop, or which does not have the 64629dc7bc6SBruce M Simpson * IPv6 HBH Router Alert option. 64729dc7bc6SBruce M Simpson * As IPv6 HBH options are stripped in ip6_input() we must 64829dc7bc6SBruce M Simpson * check an mbuf header flag. 64933cde130SBruce M Simpson * XXX Should we also sanity check that these messages 65033cde130SBruce M Simpson * were directed to a link-local multicast prefix? 65133cde130SBruce M Simpson */ 65229dc7bc6SBruce M Simpson if ((ip6->ip6_hlim != 1) || (m->m_flags & M_RTALERT_MLD) == 0) 653686cdd19SJun-ichiro itojun Hagino goto freeit; 65433cde130SBruce M Simpson if (mld_input(m, off, icmp6len) != 0) 65533cde130SBruce M Simpson return (IPPROTO_DONE); 65682cd038dSYoshinobu Inoue /* m stays. */ 65782cd038dSYoshinobu Inoue break; 65882cd038dSYoshinobu Inoue 65982cd038dSYoshinobu Inoue case ICMP6_WRUREQUEST: /* ICMP6_FQDN_QUERY */ 66082cd038dSYoshinobu Inoue { 66182cd038dSYoshinobu Inoue enum { WRU, FQDN } mode; 66282cd038dSYoshinobu Inoue 663603724d3SBjoern A. Zeeb if (!V_icmp6_nodeinfo) 664686cdd19SJun-ichiro itojun Hagino break; 665686cdd19SJun-ichiro itojun Hagino 66682cd038dSYoshinobu Inoue if (icmp6len == sizeof(struct icmp6_hdr) + 4) 66782cd038dSYoshinobu Inoue mode = WRU; 668686cdd19SJun-ichiro itojun Hagino else if (icmp6len >= sizeof(struct icmp6_nodeinfo)) 66982cd038dSYoshinobu Inoue mode = FQDN; 67082cd038dSYoshinobu Inoue else 67182cd038dSYoshinobu Inoue goto badlen; 67282cd038dSYoshinobu Inoue 67382cd038dSYoshinobu Inoue if (mode == FQDN) { 674686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 67582cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_nodeinfo), 67682cd038dSYoshinobu Inoue IPPROTO_DONE); 677686cdd19SJun-ichiro itojun Hagino #endif 678686cdd19SJun-ichiro itojun Hagino n = m_copy(m, 0, M_COPYALL); 679686cdd19SJun-ichiro itojun Hagino if (n) 680686cdd19SJun-ichiro itojun Hagino n = ni6_input(n, off); 681686cdd19SJun-ichiro itojun Hagino /* XXX meaningless if n == NULL */ 68282cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 68382cd038dSYoshinobu Inoue } else { 68476ca6f88SJamie Gritton struct prison *pr; 68582cd038dSYoshinobu Inoue u_char *p; 68676ca6f88SJamie Gritton int maxlen, maxhlen, hlen; 68782cd038dSYoshinobu Inoue 68818706985SJINMEI Tatuya /* 68918706985SJINMEI Tatuya * XXX: this combination of flags is pointless, 69018706985SJINMEI Tatuya * but should we keep this for compatibility? 69118706985SJINMEI Tatuya */ 692603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & 5) != 5) 69333841545SHajimu UMEMOTO break; 69433841545SHajimu UMEMOTO 695686cdd19SJun-ichiro itojun Hagino if (code != 0) 696686cdd19SJun-ichiro itojun Hagino goto badcode; 697686cdd19SJun-ichiro itojun Hagino maxlen = sizeof(*nip6) + sizeof(*nicmp6) + 4; 698686cdd19SJun-ichiro itojun Hagino if (maxlen >= MCLBYTES) { 699686cdd19SJun-ichiro itojun Hagino /* Give up remote */ 700686cdd19SJun-ichiro itojun Hagino break; 701686cdd19SJun-ichiro itojun Hagino } 702a163d034SWarner Losh MGETHDR(n, M_DONTWAIT, m->m_type); 703686cdd19SJun-ichiro itojun Hagino if (n && maxlen > MHLEN) { 704a163d034SWarner Losh MCLGET(n, M_DONTWAIT); 705686cdd19SJun-ichiro itojun Hagino if ((n->m_flags & M_EXT) == 0) { 706686cdd19SJun-ichiro itojun Hagino m_free(n); 707686cdd19SJun-ichiro itojun Hagino n = NULL; 708686cdd19SJun-ichiro itojun Hagino } 709686cdd19SJun-ichiro itojun Hagino } 71031a94603SBruce M Simpson if (n && !m_dup_pkthdr(n, m, M_DONTWAIT)) { 7119967cafcSSam Leffler /* 7129967cafcSSam Leffler * Previous code did a blind M_COPY_PKTHDR 7139967cafcSSam Leffler * and said "just for rcvif". If true, then 7149967cafcSSam Leffler * we could tolerate the dup failing (due to 7159967cafcSSam Leffler * the deep copy of the tag chain). For now 7169967cafcSSam Leffler * be conservative and just fail. 7179967cafcSSam Leffler */ 7189967cafcSSam Leffler m_free(n); 7199967cafcSSam Leffler n = NULL; 7209967cafcSSam Leffler } 72182cd038dSYoshinobu Inoue if (n == NULL) { 72282cd038dSYoshinobu Inoue /* Give up remote */ 72382cd038dSYoshinobu Inoue break; 72482cd038dSYoshinobu Inoue } 72533841545SHajimu UMEMOTO n->m_pkthdr.rcvif = NULL; 726686cdd19SJun-ichiro itojun Hagino n->m_len = 0; 727686cdd19SJun-ichiro itojun Hagino maxhlen = M_TRAILINGSPACE(n) - maxlen; 72876ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 72976ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 730c1f19219SJamie Gritton hlen = strlen(pr->pr_hostname); 73176ca6f88SJamie Gritton if (maxhlen > hlen) 73276ca6f88SJamie Gritton maxhlen = hlen; 73382cd038dSYoshinobu Inoue /* 73482cd038dSYoshinobu Inoue * Copy IPv6 and ICMPv6 only. 73582cd038dSYoshinobu Inoue */ 73682cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 73782cd038dSYoshinobu Inoue bcopy(ip6, nip6, sizeof(struct ip6_hdr)); 73882cd038dSYoshinobu Inoue nicmp6 = (struct icmp6_hdr *)(nip6 + 1); 73982cd038dSYoshinobu Inoue bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr)); 74082cd038dSYoshinobu Inoue p = (u_char *)(nicmp6 + 1); 74182cd038dSYoshinobu Inoue bzero(p, 4); 742c1f19219SJamie Gritton /* meaningless TTL */ 743c1f19219SJamie Gritton bcopy(pr->pr_hostname, p + 4, maxhlen); 74476ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 74582cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 74682cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) + 747686cdd19SJun-ichiro itojun Hagino sizeof(struct icmp6_hdr) + 4 + maxhlen; 74882cd038dSYoshinobu Inoue nicmp6->icmp6_type = ICMP6_WRUREPLY; 74982cd038dSYoshinobu Inoue nicmp6->icmp6_code = 0; 75082cd038dSYoshinobu Inoue } 75182cd038dSYoshinobu Inoue if (n) { 752e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_reflect); 753e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ICMP6_WRUREPLY]); 75482cd038dSYoshinobu Inoue icmp6_reflect(n, noff); 75582cd038dSYoshinobu Inoue } 75682cd038dSYoshinobu Inoue break; 75782cd038dSYoshinobu Inoue } 75882cd038dSYoshinobu Inoue 75982cd038dSYoshinobu Inoue case ICMP6_WRUREPLY: 76082cd038dSYoshinobu Inoue if (code != 0) 76182cd038dSYoshinobu Inoue goto badcode; 76282cd038dSYoshinobu Inoue break; 76382cd038dSYoshinobu Inoue 76482cd038dSYoshinobu Inoue case ND_ROUTER_SOLICIT: 76529dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_routersolicit); 76682cd038dSYoshinobu Inoue if (code != 0) 76782cd038dSYoshinobu Inoue goto badcode; 76882cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_router_solicit)) 76982cd038dSYoshinobu Inoue goto badlen; 770a163d034SWarner Losh if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 771686cdd19SJun-ichiro itojun Hagino /* give up local */ 7721db8d1f8SAna Kukec 7731db8d1f8SAna Kukec /* Send incoming SeND packet to user space. */ 7741db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 7751db8d1f8SAna Kukec IP6_EXTHDR_CHECK(m, off, 7761db8d1f8SAna Kukec icmp6len, IPPROTO_DONE); 7771db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 7781db8d1f8SAna Kukec SND_IN, ip6len); 7791db8d1f8SAna Kukec /* -1 == no app on SEND socket */ 7801db8d1f8SAna Kukec if (error == 0) 7811db8d1f8SAna Kukec return (IPPROTO_DONE); 7821db8d1f8SAna Kukec nd6_rs_input(m, off, icmp6len); 7831db8d1f8SAna Kukec } else 78482cd038dSYoshinobu Inoue nd6_rs_input(m, off, icmp6len); 785686cdd19SJun-ichiro itojun Hagino m = NULL; 786686cdd19SJun-ichiro itojun Hagino goto freeit; 787686cdd19SJun-ichiro itojun Hagino } 7881db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 789e7a6db74SAna Kukec IP6_EXTHDR_CHECK(n, off, 7901db8d1f8SAna Kukec icmp6len, IPPROTO_DONE); 7911db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 7921db8d1f8SAna Kukec SND_IN, ip6len); 793e7a6db74SAna Kukec if (error == 0) 794e7a6db74SAna Kukec goto freeit; 7951db8d1f8SAna Kukec /* -1 == no app on SEND socket */ 7961db8d1f8SAna Kukec nd6_rs_input(n, off, icmp6len); 7971db8d1f8SAna Kukec } else 798686cdd19SJun-ichiro itojun Hagino nd6_rs_input(n, off, icmp6len); 79982cd038dSYoshinobu Inoue /* m stays. */ 80082cd038dSYoshinobu Inoue break; 80182cd038dSYoshinobu Inoue 80282cd038dSYoshinobu Inoue case ND_ROUTER_ADVERT: 80329dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_routeradvert); 80482cd038dSYoshinobu Inoue if (code != 0) 80582cd038dSYoshinobu Inoue goto badcode; 80682cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_router_advert)) 80782cd038dSYoshinobu Inoue goto badlen; 808a163d034SWarner Losh if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 8091db8d1f8SAna Kukec 8101db8d1f8SAna Kukec /* Send incoming SeND-protected/ND packet to user space. */ 8111db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8121db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8131db8d1f8SAna Kukec SND_IN, ip6len); 8141db8d1f8SAna Kukec if (error == 0) 8151db8d1f8SAna Kukec return (IPPROTO_DONE); 8161db8d1f8SAna Kukec nd6_ra_input(m, off, icmp6len); 8171db8d1f8SAna Kukec } else 81882cd038dSYoshinobu Inoue nd6_ra_input(m, off, icmp6len); 819686cdd19SJun-ichiro itojun Hagino m = NULL; 820686cdd19SJun-ichiro itojun Hagino goto freeit; 821686cdd19SJun-ichiro itojun Hagino } 8221db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8231db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8241db8d1f8SAna Kukec SND_IN, ip6len); 8251db8d1f8SAna Kukec if (error == 0) 826e7a6db74SAna Kukec goto freeit; 8271db8d1f8SAna Kukec nd6_ra_input(n, off, icmp6len); 8281db8d1f8SAna Kukec } else 829686cdd19SJun-ichiro itojun Hagino nd6_ra_input(n, off, icmp6len); 83082cd038dSYoshinobu Inoue /* m stays. */ 83182cd038dSYoshinobu Inoue break; 83282cd038dSYoshinobu Inoue 83382cd038dSYoshinobu Inoue case ND_NEIGHBOR_SOLICIT: 83429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_neighborsolicit); 83582cd038dSYoshinobu Inoue if (code != 0) 83682cd038dSYoshinobu Inoue goto badcode; 83782cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_neighbor_solicit)) 83882cd038dSYoshinobu Inoue goto badlen; 839a163d034SWarner Losh if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 8401db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8411db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8421db8d1f8SAna Kukec SND_IN, ip6len); 8431db8d1f8SAna Kukec if (error == 0) 8441db8d1f8SAna Kukec return (IPPROTO_DONE); 84582cd038dSYoshinobu Inoue nd6_ns_input(m, off, icmp6len); 8461db8d1f8SAna Kukec } else 8471db8d1f8SAna Kukec nd6_ns_input(m, off, icmp6len); 848686cdd19SJun-ichiro itojun Hagino m = NULL; 849686cdd19SJun-ichiro itojun Hagino goto freeit; 850686cdd19SJun-ichiro itojun Hagino } 8511db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8521db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8531db8d1f8SAna Kukec SND_IN, ip6len); 8541db8d1f8SAna Kukec if (error == 0) 855e7a6db74SAna Kukec goto freeit; 8561db8d1f8SAna Kukec nd6_ns_input(n, off, icmp6len); 8571db8d1f8SAna Kukec } else 858686cdd19SJun-ichiro itojun Hagino nd6_ns_input(n, off, icmp6len); 85982cd038dSYoshinobu Inoue /* m stays. */ 86082cd038dSYoshinobu Inoue break; 86182cd038dSYoshinobu Inoue 86282cd038dSYoshinobu Inoue case ND_NEIGHBOR_ADVERT: 86329dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_neighboradvert); 86482cd038dSYoshinobu Inoue if (code != 0) 86582cd038dSYoshinobu Inoue goto badcode; 86682cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_neighbor_advert)) 86782cd038dSYoshinobu Inoue goto badlen; 868a163d034SWarner Losh if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 8691db8d1f8SAna Kukec 8701db8d1f8SAna Kukec /* Send incoming SeND-protected/ND packet to user space. */ 8711db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8721db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8731db8d1f8SAna Kukec SND_IN, ip6len); 8741db8d1f8SAna Kukec if (error == 0) 8751db8d1f8SAna Kukec return (IPPROTO_DONE); 87682cd038dSYoshinobu Inoue nd6_na_input(m, off, icmp6len); 8771db8d1f8SAna Kukec } else 8781db8d1f8SAna Kukec nd6_na_input(m, off, icmp6len); 879686cdd19SJun-ichiro itojun Hagino m = NULL; 880686cdd19SJun-ichiro itojun Hagino goto freeit; 881686cdd19SJun-ichiro itojun Hagino } 8821db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8831db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8841db8d1f8SAna Kukec SND_IN, ip6len); 8851db8d1f8SAna Kukec if (error == 0) 886e7a6db74SAna Kukec goto freeit; 8871db8d1f8SAna Kukec nd6_na_input(n, off, icmp6len); 8881db8d1f8SAna Kukec } else 889686cdd19SJun-ichiro itojun Hagino nd6_na_input(n, off, icmp6len); 89082cd038dSYoshinobu Inoue /* m stays. */ 89182cd038dSYoshinobu Inoue break; 89282cd038dSYoshinobu Inoue 89382cd038dSYoshinobu Inoue case ND_REDIRECT: 89429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_redirect); 89582cd038dSYoshinobu Inoue if (code != 0) 89682cd038dSYoshinobu Inoue goto badcode; 89782cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_redirect)) 89882cd038dSYoshinobu Inoue goto badlen; 899a163d034SWarner Losh if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) { 9001db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 9011db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 9021db8d1f8SAna Kukec SND_IN, ip6len); 9031db8d1f8SAna Kukec if (error == 0) 9041db8d1f8SAna Kukec return (IPPROTO_DONE); 90582cd038dSYoshinobu Inoue icmp6_redirect_input(m, off); 9061db8d1f8SAna Kukec } else 9071db8d1f8SAna Kukec icmp6_redirect_input(m, off); 908686cdd19SJun-ichiro itojun Hagino m = NULL; 909686cdd19SJun-ichiro itojun Hagino goto freeit; 910686cdd19SJun-ichiro itojun Hagino } 9111db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 9121db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 9131db8d1f8SAna Kukec SND_IN, ip6len); 9141db8d1f8SAna Kukec if (error == 0) 915e7a6db74SAna Kukec goto freeit; 9161db8d1f8SAna Kukec icmp6_redirect_input(n, off); 9171db8d1f8SAna Kukec } else 918686cdd19SJun-ichiro itojun Hagino icmp6_redirect_input(n, off); 91982cd038dSYoshinobu Inoue /* m stays. */ 92082cd038dSYoshinobu Inoue break; 92182cd038dSYoshinobu Inoue 92282cd038dSYoshinobu Inoue case ICMP6_ROUTER_RENUMBERING: 92382cd038dSYoshinobu Inoue if (code != ICMP6_ROUTER_RENUMBERING_COMMAND && 92482cd038dSYoshinobu Inoue code != ICMP6_ROUTER_RENUMBERING_RESULT) 92582cd038dSYoshinobu Inoue goto badcode; 92682cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct icmp6_router_renum)) 92782cd038dSYoshinobu Inoue goto badlen; 92882cd038dSYoshinobu Inoue break; 92982cd038dSYoshinobu Inoue 93082cd038dSYoshinobu Inoue default: 93133841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 93233841545SHajimu UMEMOTO "icmp6_input: unknown type %d(src=%s, dst=%s, ifid=%d)\n", 9331d54aa3bSBjoern A. Zeeb icmp6->icmp6_type, ip6_sprintf(ip6bufs, &ip6->ip6_src), 9341d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6bufd, &ip6->ip6_dst), 93529dc7bc6SBruce M Simpson ifp ? ifp->if_index : 0)); 93682cd038dSYoshinobu Inoue if (icmp6->icmp6_type < ICMP6_ECHO_REQUEST) { 93782cd038dSYoshinobu Inoue /* ICMPv6 error: MUST deliver it by spec... */ 93882cd038dSYoshinobu Inoue code = PRC_NCMDS; 93982cd038dSYoshinobu Inoue /* deliver */ 94082cd038dSYoshinobu Inoue } else { 94182cd038dSYoshinobu Inoue /* ICMPv6 informational: MUST not deliver */ 94282cd038dSYoshinobu Inoue break; 94382cd038dSYoshinobu Inoue } 94482cd038dSYoshinobu Inoue deliver: 94514c129fcSBjoern A. Zeeb if (icmp6_notify_error(&m, off, icmp6len, code) != 0) { 94633841545SHajimu UMEMOTO /* In this case, m should've been freed. */ 94733841545SHajimu UMEMOTO return (IPPROTO_DONE); 94833841545SHajimu UMEMOTO } 94933841545SHajimu UMEMOTO break; 95033841545SHajimu UMEMOTO 95133841545SHajimu UMEMOTO badcode: 952e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badcode); 95333841545SHajimu UMEMOTO break; 95433841545SHajimu UMEMOTO 95533841545SHajimu UMEMOTO badlen: 956e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badlen); 95733841545SHajimu UMEMOTO break; 95833841545SHajimu UMEMOTO } 95933841545SHajimu UMEMOTO 96033841545SHajimu UMEMOTO /* deliver the packet to appropriate sockets */ 96133841545SHajimu UMEMOTO icmp6_rip6_input(&m, *offp); 96233841545SHajimu UMEMOTO 96333841545SHajimu UMEMOTO return IPPROTO_DONE; 96433841545SHajimu UMEMOTO 96533841545SHajimu UMEMOTO freeit: 96633841545SHajimu UMEMOTO m_freem(m); 96733841545SHajimu UMEMOTO return IPPROTO_DONE; 96833841545SHajimu UMEMOTO } 96933841545SHajimu UMEMOTO 97033841545SHajimu UMEMOTO static int 9711272577eSXin LI icmp6_notify_error(struct mbuf **mp, int off, int icmp6len, int code) 97233841545SHajimu UMEMOTO { 9739c0fda72SHajimu UMEMOTO struct mbuf *m = *mp; 97433841545SHajimu UMEMOTO struct icmp6_hdr *icmp6; 97533841545SHajimu UMEMOTO struct ip6_hdr *eip6; 97633841545SHajimu UMEMOTO u_int32_t notifymtu; 97733841545SHajimu UMEMOTO struct sockaddr_in6 icmp6src, icmp6dst; 97833841545SHajimu UMEMOTO 97982cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr)) { 980e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 98182cd038dSYoshinobu Inoue goto freeit; 98282cd038dSYoshinobu Inoue } 983686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 98482cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, off, 98506cd0a3fSHajimu UMEMOTO sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr), -1); 98682cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 987686cdd19SJun-ichiro itojun Hagino #else 988686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, 989686cdd19SJun-ichiro itojun Hagino sizeof(*icmp6) + sizeof(struct ip6_hdr)); 990686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 991e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 99233841545SHajimu UMEMOTO return (-1); 993686cdd19SJun-ichiro itojun Hagino } 994686cdd19SJun-ichiro itojun Hagino #endif 99533841545SHajimu UMEMOTO eip6 = (struct ip6_hdr *)(icmp6 + 1); 99682cd038dSYoshinobu Inoue 99782cd038dSYoshinobu Inoue /* Detect the upper level protocol */ 99882cd038dSYoshinobu Inoue { 9999233d8f3SDavid E. O'Brien void (*ctlfunc)(int, struct sockaddr *, void *); 100082cd038dSYoshinobu Inoue u_int8_t nxt = eip6->ip6_nxt; 100182cd038dSYoshinobu Inoue int eoff = off + sizeof(struct icmp6_hdr) + 100282cd038dSYoshinobu Inoue sizeof(struct ip6_hdr); 100382cd038dSYoshinobu Inoue struct ip6ctlparam ip6cp; 1004686cdd19SJun-ichiro itojun Hagino struct in6_addr *finaldst = NULL; 1005686cdd19SJun-ichiro itojun Hagino int icmp6type = icmp6->icmp6_type; 1006686cdd19SJun-ichiro itojun Hagino struct ip6_frag *fh; 1007686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr *rth; 1008686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr0 *rth0; 1009686cdd19SJun-ichiro itojun Hagino int rthlen; 101082cd038dSYoshinobu Inoue 101188ff5695SSUZUKI Shinsuke while (1) { /* XXX: should avoid infinite loop explicitly? */ 101282cd038dSYoshinobu Inoue struct ip6_ext *eh; 101382cd038dSYoshinobu Inoue 101482cd038dSYoshinobu Inoue switch (nxt) { 101582cd038dSYoshinobu Inoue case IPPROTO_HOPOPTS: 101682cd038dSYoshinobu Inoue case IPPROTO_DSTOPTS: 101782cd038dSYoshinobu Inoue case IPPROTO_AH: 1018686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 101906cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, 102006cd0a3fSHajimu UMEMOTO eoff + sizeof(struct ip6_ext), -1); 10210527d333SHajimu UMEMOTO eh = (struct ip6_ext *)(mtod(m, caddr_t) + eoff); 1022686cdd19SJun-ichiro itojun Hagino #else 1023686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(eh, struct ip6_ext *, m, 1024686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*eh)); 1025686cdd19SJun-ichiro itojun Hagino if (eh == NULL) { 1026e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 102733841545SHajimu UMEMOTO return (-1); 1028686cdd19SJun-ichiro itojun Hagino } 1029686cdd19SJun-ichiro itojun Hagino #endif 1030686cdd19SJun-ichiro itojun Hagino 103182cd038dSYoshinobu Inoue if (nxt == IPPROTO_AH) 103282cd038dSYoshinobu Inoue eoff += (eh->ip6e_len + 2) << 2; 103382cd038dSYoshinobu Inoue else 103482cd038dSYoshinobu Inoue eoff += (eh->ip6e_len + 1) << 3; 103582cd038dSYoshinobu Inoue nxt = eh->ip6e_nxt; 103682cd038dSYoshinobu Inoue break; 1037686cdd19SJun-ichiro itojun Hagino case IPPROTO_ROUTING: 1038686cdd19SJun-ichiro itojun Hagino /* 1039686cdd19SJun-ichiro itojun Hagino * When the erroneous packet contains a 1040686cdd19SJun-ichiro itojun Hagino * routing header, we should examine the 1041686cdd19SJun-ichiro itojun Hagino * header to determine the final destination. 1042686cdd19SJun-ichiro itojun Hagino * Otherwise, we can't properly update 1043686cdd19SJun-ichiro itojun Hagino * information that depends on the final 1044686cdd19SJun-ichiro itojun Hagino * destination (e.g. path MTU). 1045686cdd19SJun-ichiro itojun Hagino */ 1046686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 104706cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, eoff + sizeof(*rth), -1); 104806cd0a3fSHajimu UMEMOTO rth = (struct ip6_rthdr *) 104906cd0a3fSHajimu UMEMOTO (mtod(m, caddr_t) + eoff); 1050686cdd19SJun-ichiro itojun Hagino #else 1051686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(rth, struct ip6_rthdr *, m, 1052686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*rth)); 1053686cdd19SJun-ichiro itojun Hagino if (rth == NULL) { 1054e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 105533841545SHajimu UMEMOTO return (-1); 1056686cdd19SJun-ichiro itojun Hagino } 1057686cdd19SJun-ichiro itojun Hagino #endif 1058686cdd19SJun-ichiro itojun Hagino rthlen = (rth->ip6r_len + 1) << 3; 1059686cdd19SJun-ichiro itojun Hagino /* 1060686cdd19SJun-ichiro itojun Hagino * XXX: currently there is no 1061686cdd19SJun-ichiro itojun Hagino * officially defined type other 1062686cdd19SJun-ichiro itojun Hagino * than type-0. 1063686cdd19SJun-ichiro itojun Hagino * Note that if the segment left field 1064686cdd19SJun-ichiro itojun Hagino * is 0, all intermediate hops must 1065686cdd19SJun-ichiro itojun Hagino * have been passed. 1066686cdd19SJun-ichiro itojun Hagino */ 1067686cdd19SJun-ichiro itojun Hagino if (rth->ip6r_segleft && 1068686cdd19SJun-ichiro itojun Hagino rth->ip6r_type == IPV6_RTHDR_TYPE_0) { 1069686cdd19SJun-ichiro itojun Hagino int hops; 1070686cdd19SJun-ichiro itojun Hagino 1071686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 107206cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, eoff + rthlen, -1); 107306cd0a3fSHajimu UMEMOTO rth0 = (struct ip6_rthdr0 *) 107406cd0a3fSHajimu UMEMOTO (mtod(m, caddr_t) + eoff); 1075686cdd19SJun-ichiro itojun Hagino #else 1076686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(rth0, 1077686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr0 *, m, 1078686cdd19SJun-ichiro itojun Hagino eoff, rthlen); 1079686cdd19SJun-ichiro itojun Hagino if (rth0 == NULL) { 1080e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 108133841545SHajimu UMEMOTO return (-1); 1082686cdd19SJun-ichiro itojun Hagino } 1083686cdd19SJun-ichiro itojun Hagino #endif 1084686cdd19SJun-ichiro itojun Hagino /* just ignore a bogus header */ 1085686cdd19SJun-ichiro itojun Hagino if ((rth0->ip6r0_len % 2) == 0 && 1086686cdd19SJun-ichiro itojun Hagino (hops = rth0->ip6r0_len/2)) 1087686cdd19SJun-ichiro itojun Hagino finaldst = (struct in6_addr *)(rth0 + 1) + (hops - 1); 1088686cdd19SJun-ichiro itojun Hagino } 1089686cdd19SJun-ichiro itojun Hagino eoff += rthlen; 1090686cdd19SJun-ichiro itojun Hagino nxt = rth->ip6r_nxt; 1091686cdd19SJun-ichiro itojun Hagino break; 1092686cdd19SJun-ichiro itojun Hagino case IPPROTO_FRAGMENT: 1093686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 1094686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, 0, eoff + 109506cd0a3fSHajimu UMEMOTO sizeof(struct ip6_frag), -1); 109606cd0a3fSHajimu UMEMOTO fh = (struct ip6_frag *)(mtod(m, caddr_t) + 109706cd0a3fSHajimu UMEMOTO eoff); 1098686cdd19SJun-ichiro itojun Hagino #else 1099686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(fh, struct ip6_frag *, m, 1100686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*fh)); 1101686cdd19SJun-ichiro itojun Hagino if (fh == NULL) { 1102e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 110333841545SHajimu UMEMOTO return (-1); 1104686cdd19SJun-ichiro itojun Hagino } 1105686cdd19SJun-ichiro itojun Hagino #endif 1106686cdd19SJun-ichiro itojun Hagino /* 1107686cdd19SJun-ichiro itojun Hagino * Data after a fragment header is meaningless 1108686cdd19SJun-ichiro itojun Hagino * unless it is the first fragment, but 1109686cdd19SJun-ichiro itojun Hagino * we'll go to the notify label for path MTU 1110686cdd19SJun-ichiro itojun Hagino * discovery. 1111686cdd19SJun-ichiro itojun Hagino */ 1112686cdd19SJun-ichiro itojun Hagino if (fh->ip6f_offlg & IP6F_OFF_MASK) 1113686cdd19SJun-ichiro itojun Hagino goto notify; 1114686cdd19SJun-ichiro itojun Hagino 1115686cdd19SJun-ichiro itojun Hagino eoff += sizeof(struct ip6_frag); 1116686cdd19SJun-ichiro itojun Hagino nxt = fh->ip6f_nxt; 1117686cdd19SJun-ichiro itojun Hagino break; 111882cd038dSYoshinobu Inoue default: 1119686cdd19SJun-ichiro itojun Hagino /* 1120686cdd19SJun-ichiro itojun Hagino * This case includes ESP and the No Next 1121686cdd19SJun-ichiro itojun Hagino * Header. In such cases going to the notify 1122686cdd19SJun-ichiro itojun Hagino * label does not have any meaning 1123686cdd19SJun-ichiro itojun Hagino * (i.e. ctlfunc will be NULL), but we go 1124686cdd19SJun-ichiro itojun Hagino * anyway since we might have to update 1125686cdd19SJun-ichiro itojun Hagino * path MTU information. 1126686cdd19SJun-ichiro itojun Hagino */ 112782cd038dSYoshinobu Inoue goto notify; 112882cd038dSYoshinobu Inoue } 112982cd038dSYoshinobu Inoue } 113082cd038dSYoshinobu Inoue notify: 1131686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 113282cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 1133686cdd19SJun-ichiro itojun Hagino #else 1134686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, 1135686cdd19SJun-ichiro itojun Hagino sizeof(*icmp6) + sizeof(struct ip6_hdr)); 1136686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 1137e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 113833841545SHajimu UMEMOTO return (-1); 1139686cdd19SJun-ichiro itojun Hagino } 1140686cdd19SJun-ichiro itojun Hagino #endif 114133841545SHajimu UMEMOTO 114206cd0a3fSHajimu UMEMOTO /* 114306cd0a3fSHajimu UMEMOTO * retrieve parameters from the inner IPv6 header, and convert 114406cd0a3fSHajimu UMEMOTO * them into sockaddr structures. 114506cd0a3fSHajimu UMEMOTO * XXX: there is no guarantee that the source or destination 114606cd0a3fSHajimu UMEMOTO * addresses of the inner packet are in the same scope as 114706cd0a3fSHajimu UMEMOTO * the addresses of the icmp packet. But there is no other 114806cd0a3fSHajimu UMEMOTO * way to determine the zone. 114906cd0a3fSHajimu UMEMOTO */ 115033841545SHajimu UMEMOTO eip6 = (struct ip6_hdr *)(icmp6 + 1); 115106cd0a3fSHajimu UMEMOTO 115233841545SHajimu UMEMOTO bzero(&icmp6dst, sizeof(icmp6dst)); 115333841545SHajimu UMEMOTO icmp6dst.sin6_len = sizeof(struct sockaddr_in6); 115433841545SHajimu UMEMOTO icmp6dst.sin6_family = AF_INET6; 1155686cdd19SJun-ichiro itojun Hagino if (finaldst == NULL) 115633841545SHajimu UMEMOTO icmp6dst.sin6_addr = eip6->ip6_dst; 115733841545SHajimu UMEMOTO else 115833841545SHajimu UMEMOTO icmp6dst.sin6_addr = *finaldst; 1159a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&icmp6dst.sin6_addr, m->m_pkthdr.rcvif, NULL)) 11609a4f9608SHajimu UMEMOTO goto freeit; 116133841545SHajimu UMEMOTO bzero(&icmp6src, sizeof(icmp6src)); 116233841545SHajimu UMEMOTO icmp6src.sin6_len = sizeof(struct sockaddr_in6); 116333841545SHajimu UMEMOTO icmp6src.sin6_family = AF_INET6; 116433841545SHajimu UMEMOTO icmp6src.sin6_addr = eip6->ip6_src; 1165a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&icmp6src.sin6_addr, m->m_pkthdr.rcvif, NULL)) 11669a4f9608SHajimu UMEMOTO goto freeit; 1167a1f7e5f8SHajimu UMEMOTO icmp6src.sin6_flowinfo = 1168a1f7e5f8SHajimu UMEMOTO (eip6->ip6_flow & IPV6_FLOWLABEL_MASK); 116933841545SHajimu UMEMOTO 117033841545SHajimu UMEMOTO if (finaldst == NULL) 117133841545SHajimu UMEMOTO finaldst = &eip6->ip6_dst; 117233841545SHajimu UMEMOTO ip6cp.ip6c_m = m; 117333841545SHajimu UMEMOTO ip6cp.ip6c_icmp6 = icmp6; 117433841545SHajimu UMEMOTO ip6cp.ip6c_ip6 = (struct ip6_hdr *)(icmp6 + 1); 117533841545SHajimu UMEMOTO ip6cp.ip6c_off = eoff; 117633841545SHajimu UMEMOTO ip6cp.ip6c_finaldst = finaldst; 117733841545SHajimu UMEMOTO ip6cp.ip6c_src = &icmp6src; 117833841545SHajimu UMEMOTO ip6cp.ip6c_nxt = nxt; 117933841545SHajimu UMEMOTO 1180e0bfbfceSBjoern A. Zeeb m_addr_changed(m); 1181e0bfbfceSBjoern A. Zeeb 118233841545SHajimu UMEMOTO if (icmp6type == ICMP6_PACKET_TOO_BIG) { 118333841545SHajimu UMEMOTO notifymtu = ntohl(icmp6->icmp6_mtu); 118433841545SHajimu UMEMOTO ip6cp.ip6c_cmdarg = (void *)¬ifymtu; 118533841545SHajimu UMEMOTO icmp6_mtudisc_update(&ip6cp, 1); /*XXX*/ 1186686cdd19SJun-ichiro itojun Hagino } 1187686cdd19SJun-ichiro itojun Hagino 11889233d8f3SDavid E. O'Brien ctlfunc = (void (*)(int, struct sockaddr *, void *)) 118982cd038dSYoshinobu Inoue (inet6sw[ip6_protox[nxt]].pr_ctlinput); 119082cd038dSYoshinobu Inoue if (ctlfunc) { 119133841545SHajimu UMEMOTO (void) (*ctlfunc)(code, (struct sockaddr *)&icmp6dst, 119233841545SHajimu UMEMOTO &ip6cp); 119382cd038dSYoshinobu Inoue } 119482cd038dSYoshinobu Inoue } 11959c0fda72SHajimu UMEMOTO *mp = m; 119633841545SHajimu UMEMOTO return (0); 119782cd038dSYoshinobu Inoue 119882cd038dSYoshinobu Inoue freeit: 119982cd038dSYoshinobu Inoue m_freem(m); 120033841545SHajimu UMEMOTO return (-1); 120182cd038dSYoshinobu Inoue } 120282cd038dSYoshinobu Inoue 120333841545SHajimu UMEMOTO void 12041272577eSXin LI icmp6_mtudisc_update(struct ip6ctlparam *ip6cp, int validated) 1205686cdd19SJun-ichiro itojun Hagino { 120633841545SHajimu UMEMOTO struct in6_addr *dst = ip6cp->ip6c_finaldst; 120733841545SHajimu UMEMOTO struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6; 120833841545SHajimu UMEMOTO struct mbuf *m = ip6cp->ip6c_m; /* will be necessary for scope issue */ 1209686cdd19SJun-ichiro itojun Hagino u_int mtu = ntohl(icmp6->icmp6_mtu); 121097d8d152SAndre Oppermann struct in_conninfo inc; 1211686cdd19SJun-ichiro itojun Hagino 1212f95d4633SHajimu UMEMOTO #if 0 1213f95d4633SHajimu UMEMOTO /* 1214f95d4633SHajimu UMEMOTO * RFC2460 section 5, last paragraph. 1215f95d4633SHajimu UMEMOTO * even though minimum link MTU for IPv6 is IPV6_MMTU, 1216f95d4633SHajimu UMEMOTO * we may see ICMPv6 too big with mtu < IPV6_MMTU 1217f95d4633SHajimu UMEMOTO * due to packet translator in the middle. 1218f95d4633SHajimu UMEMOTO * see ip6_output() and ip6_getpmtu() "alwaysfrag" case for 1219f95d4633SHajimu UMEMOTO * special handling. 1220f95d4633SHajimu UMEMOTO */ 1221f95d4633SHajimu UMEMOTO if (mtu < IPV6_MMTU) 1222f95d4633SHajimu UMEMOTO return; 1223f95d4633SHajimu UMEMOTO #endif 1224f95d4633SHajimu UMEMOTO 1225f95d4633SHajimu UMEMOTO /* 1226f95d4633SHajimu UMEMOTO * we reject ICMPv6 too big with abnormally small value. 1227f95d4633SHajimu UMEMOTO * XXX what is the good definition of "abnormally small"? 1228f95d4633SHajimu UMEMOTO */ 1229f95d4633SHajimu UMEMOTO if (mtu < sizeof(struct ip6_hdr) + sizeof(struct ip6_frag) + 8) 1230f95d4633SHajimu UMEMOTO return; 1231f95d4633SHajimu UMEMOTO 123233841545SHajimu UMEMOTO if (!validated) 123333841545SHajimu UMEMOTO return; 123433841545SHajimu UMEMOTO 123559ca51adSSimon L. B. Nielsen /* 123659ca51adSSimon L. B. Nielsen * In case the suggested mtu is less than IPV6_MMTU, we 123759ca51adSSimon L. B. Nielsen * only need to remember that it was for above mentioned 123859ca51adSSimon L. B. Nielsen * "alwaysfrag" case. 123959ca51adSSimon L. B. Nielsen * Try to be as close to the spec as possible. 124059ca51adSSimon L. B. Nielsen */ 124159ca51adSSimon L. B. Nielsen if (mtu < IPV6_MMTU) 124259ca51adSSimon L. B. Nielsen mtu = IPV6_MMTU - 8; 124359ca51adSSimon L. B. Nielsen 124497d8d152SAndre Oppermann bzero(&inc, sizeof(inc)); 1245dcdb4371SBjoern A. Zeeb inc.inc_flags |= INC_ISIPV6; 124697d8d152SAndre Oppermann inc.inc6_faddr = *dst; 1247a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&inc.inc6_faddr, m->m_pkthdr.rcvif, NULL)) 1248a1f7e5f8SHajimu UMEMOTO return; 1249686cdd19SJun-ichiro itojun Hagino 1250233dcce1SAndre Oppermann if (mtu < tcp_maxmtu6(&inc, NULL)) { 125197d8d152SAndre Oppermann tcp_hc_updatemtu(&inc, mtu); 1252e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_pmtuchg); 1253686cdd19SJun-ichiro itojun Hagino } 1254686cdd19SJun-ichiro itojun Hagino } 1255686cdd19SJun-ichiro itojun Hagino 125682cd038dSYoshinobu Inoue /* 125733841545SHajimu UMEMOTO * Process a Node Information Query packet, based on 125833841545SHajimu UMEMOTO * draft-ietf-ipngwg-icmp-name-lookups-07. 1259686cdd19SJun-ichiro itojun Hagino * 1260686cdd19SJun-ichiro itojun Hagino * Spec incompatibilities: 1261686cdd19SJun-ichiro itojun Hagino * - IPv6 Subject address handling 1262686cdd19SJun-ichiro itojun Hagino * - IPv4 Subject address handling support missing 1263686cdd19SJun-ichiro itojun Hagino * - Proxy reply (answer even if it's not for me) 1264686cdd19SJun-ichiro itojun Hagino * - joins NI group address at in6_ifattach() time only, does not cope 1265686cdd19SJun-ichiro itojun Hagino * with hostname changes by sethostname(3) 126682cd038dSYoshinobu Inoue */ 126782cd038dSYoshinobu Inoue static struct mbuf * 12681272577eSXin LI ni6_input(struct mbuf *m, int off) 126982cd038dSYoshinobu Inoue { 1270686cdd19SJun-ichiro itojun Hagino struct icmp6_nodeinfo *ni6, *nni6; 127182cd038dSYoshinobu Inoue struct mbuf *n = NULL; 127276ca6f88SJamie Gritton struct prison *pr; 1273686cdd19SJun-ichiro itojun Hagino u_int16_t qtype; 1274686cdd19SJun-ichiro itojun Hagino int subjlen; 127582cd038dSYoshinobu Inoue int replylen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo); 127682cd038dSYoshinobu Inoue struct ni_reply_fqdn *fqdn; 127782cd038dSYoshinobu Inoue int addrs; /* for NI_QTYPE_NODEADDR */ 127882cd038dSYoshinobu Inoue struct ifnet *ifp = NULL; /* for NI_QTYPE_NODEADDR */ 1279a1f7e5f8SHajimu UMEMOTO struct in6_addr in6_subj; /* subject address */ 1280686cdd19SJun-ichiro itojun Hagino struct ip6_hdr *ip6; 1281686cdd19SJun-ichiro itojun Hagino int oldfqdn = 0; /* if 1, return pascal string (03 draft) */ 128233841545SHajimu UMEMOTO char *subj = NULL; 128333841545SHajimu UMEMOTO struct in6_ifaddr *ia6 = NULL; 128482cd038dSYoshinobu Inoue 1285686cdd19SJun-ichiro itojun Hagino ip6 = mtod(m, struct ip6_hdr *); 1286686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 1287686cdd19SJun-ichiro itojun Hagino ni6 = (struct icmp6_nodeinfo *)(mtod(m, caddr_t) + off); 1288686cdd19SJun-ichiro itojun Hagino #else 1289686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(ni6, struct icmp6_nodeinfo *, m, off, sizeof(*ni6)); 1290686cdd19SJun-ichiro itojun Hagino if (ni6 == NULL) { 1291686cdd19SJun-ichiro itojun Hagino /* m is already reclaimed */ 129206cd0a3fSHajimu UMEMOTO return (NULL); 1293686cdd19SJun-ichiro itojun Hagino } 1294686cdd19SJun-ichiro itojun Hagino #endif 1295686cdd19SJun-ichiro itojun Hagino 1296686cdd19SJun-ichiro itojun Hagino /* 129718706985SJINMEI Tatuya * Validate IPv6 source address. 129818706985SJINMEI Tatuya * The default configuration MUST be to refuse answering queries from 129918706985SJINMEI Tatuya * global-scope addresses according to RFC4602. 130018706985SJINMEI Tatuya * Notes: 130118706985SJINMEI Tatuya * - it's not very clear what "refuse" means; this implementation 130218706985SJINMEI Tatuya * simply drops it. 130318706985SJINMEI Tatuya * - it's not very easy to identify global-scope (unicast) addresses 130418706985SJINMEI Tatuya * since there are many prefixes for them. It should be safer 130518706985SJINMEI Tatuya * and in practice sufficient to check "all" but loopback and 130618706985SJINMEI Tatuya * link-local (note that site-local unicast was deprecated and 130718706985SJINMEI Tatuya * ULA is defined as global scope-wise) 130818706985SJINMEI Tatuya */ 1309603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_GLOBALOK) == 0 && 131018706985SJINMEI Tatuya !IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) && 131118706985SJINMEI Tatuya !IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src)) 131218706985SJINMEI Tatuya goto bad; 131318706985SJINMEI Tatuya 131418706985SJINMEI Tatuya /* 1315686cdd19SJun-ichiro itojun Hagino * Validate IPv6 destination address. 1316686cdd19SJun-ichiro itojun Hagino * 131733841545SHajimu UMEMOTO * The Responder must discard the Query without further processing 131833841545SHajimu UMEMOTO * unless it is one of the Responder's unicast or anycast addresses, or 131933841545SHajimu UMEMOTO * a link-local scope multicast address which the Responder has joined. 132018706985SJINMEI Tatuya * [RFC4602, Section 5.] 1321686cdd19SJun-ichiro itojun Hagino */ 13222a5aafceSHajimu UMEMOTO if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 13232a5aafceSHajimu UMEMOTO if (!IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 13242a5aafceSHajimu UMEMOTO goto bad; 13252a5aafceSHajimu UMEMOTO /* else it's a link-local multicast, fine */ 13262a5aafceSHajimu UMEMOTO } else { /* unicast or anycast */ 13272a5aafceSHajimu UMEMOTO if ((ia6 = ip6_getdstifaddr(m)) == NULL) 13282a5aafceSHajimu UMEMOTO goto bad; /* XXX impossible */ 13292a5aafceSHajimu UMEMOTO 13302a5aafceSHajimu UMEMOTO if ((ia6->ia6_flags & IN6_IFF_TEMPORARY) && 1331603724d3SBjoern A. Zeeb !(V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK)) { 13328c0fec80SRobert Watson ifa_free(&ia6->ia_ifa); 133333841545SHajimu UMEMOTO nd6log((LOG_DEBUG, "ni6_input: ignore node info to " 133433841545SHajimu UMEMOTO "a temporary address in %s:%d", 133533841545SHajimu UMEMOTO __FILE__, __LINE__)); 133633841545SHajimu UMEMOTO goto bad; 133733841545SHajimu UMEMOTO } 13388c0fec80SRobert Watson ifa_free(&ia6->ia_ifa); 13392a5aafceSHajimu UMEMOTO } 1340686cdd19SJun-ichiro itojun Hagino 1341686cdd19SJun-ichiro itojun Hagino /* validate query Subject field. */ 134233841545SHajimu UMEMOTO qtype = ntohs(ni6->ni_qtype); 1343686cdd19SJun-ichiro itojun Hagino subjlen = m->m_pkthdr.len - off - sizeof(struct icmp6_nodeinfo); 1344686cdd19SJun-ichiro itojun Hagino switch (qtype) { 1345686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_NOOP: 1346686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_SUPTYPES: 134733841545SHajimu UMEMOTO /* 07 draft */ 134833841545SHajimu UMEMOTO if (ni6->ni_code == ICMP6_NI_SUBJ_FQDN && subjlen == 0) 1349686cdd19SJun-ichiro itojun Hagino break; 135033841545SHajimu UMEMOTO /* FALLTHROUGH */ 1351686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_FQDN: 1352686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_NODEADDR: 1353a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1354686cdd19SJun-ichiro itojun Hagino switch (ni6->ni_code) { 1355686cdd19SJun-ichiro itojun Hagino case ICMP6_NI_SUBJ_IPV6: 1356686cdd19SJun-ichiro itojun Hagino #if ICMP6_NI_SUBJ_IPV6 != 0 1357686cdd19SJun-ichiro itojun Hagino case 0: 1358686cdd19SJun-ichiro itojun Hagino #endif 1359686cdd19SJun-ichiro itojun Hagino /* 1360686cdd19SJun-ichiro itojun Hagino * backward compatibility - try to accept 03 draft 1361686cdd19SJun-ichiro itojun Hagino * format, where no Subject is present. 1362686cdd19SJun-ichiro itojun Hagino */ 136333841545SHajimu UMEMOTO if (qtype == NI_QTYPE_FQDN && ni6->ni_code == 0 && 136433841545SHajimu UMEMOTO subjlen == 0) { 1365686cdd19SJun-ichiro itojun Hagino oldfqdn++; 1366686cdd19SJun-ichiro itojun Hagino break; 1367686cdd19SJun-ichiro itojun Hagino } 136833841545SHajimu UMEMOTO #if ICMP6_NI_SUBJ_IPV6 != 0 136933841545SHajimu UMEMOTO if (ni6->ni_code != ICMP6_NI_SUBJ_IPV6) 137033841545SHajimu UMEMOTO goto bad; 137133841545SHajimu UMEMOTO #endif 1372686cdd19SJun-ichiro itojun Hagino 13732a5aafceSHajimu UMEMOTO if (subjlen != sizeof(struct in6_addr)) 1374686cdd19SJun-ichiro itojun Hagino goto bad; 1375686cdd19SJun-ichiro itojun Hagino 1376686cdd19SJun-ichiro itojun Hagino /* 1377686cdd19SJun-ichiro itojun Hagino * Validate Subject address. 1378686cdd19SJun-ichiro itojun Hagino * 137933841545SHajimu UMEMOTO * Not sure what exactly "address belongs to the node" 138033841545SHajimu UMEMOTO * means in the spec, is it just unicast, or what? 1381686cdd19SJun-ichiro itojun Hagino * 1382686cdd19SJun-ichiro itojun Hagino * At this moment we consider Subject address as 1383686cdd19SJun-ichiro itojun Hagino * "belong to the node" if the Subject address equals 1384686cdd19SJun-ichiro itojun Hagino * to the IPv6 destination address; validation for 1385686cdd19SJun-ichiro itojun Hagino * IPv6 destination address should have done enough 1386686cdd19SJun-ichiro itojun Hagino * check for us. 1387686cdd19SJun-ichiro itojun Hagino * 1388686cdd19SJun-ichiro itojun Hagino * We do not do proxy at this moment. 1389686cdd19SJun-ichiro itojun Hagino */ 1390686cdd19SJun-ichiro itojun Hagino /* m_pulldown instead of copy? */ 1391686cdd19SJun-ichiro itojun Hagino m_copydata(m, off + sizeof(struct icmp6_nodeinfo), 1392a1f7e5f8SHajimu UMEMOTO subjlen, (caddr_t)&in6_subj); 1393a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&in6_subj, m->m_pkthdr.rcvif, NULL)) 13949a4f9608SHajimu UMEMOTO goto bad; 13952a5aafceSHajimu UMEMOTO 1396a1f7e5f8SHajimu UMEMOTO subj = (char *)&in6_subj; 1397a1f7e5f8SHajimu UMEMOTO if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &in6_subj)) 1398686cdd19SJun-ichiro itojun Hagino break; 139933841545SHajimu UMEMOTO 1400686cdd19SJun-ichiro itojun Hagino /* 1401686cdd19SJun-ichiro itojun Hagino * XXX if we are to allow other cases, we should really 1402686cdd19SJun-ichiro itojun Hagino * be careful about scope here. 1403686cdd19SJun-ichiro itojun Hagino * basically, we should disallow queries toward IPv6 140406cd0a3fSHajimu UMEMOTO * destination X with subject Y, 140506cd0a3fSHajimu UMEMOTO * if scope(X) > scope(Y). 1406686cdd19SJun-ichiro itojun Hagino * if we allow scope(X) > scope(Y), it will result in 1407686cdd19SJun-ichiro itojun Hagino * information leakage across scope boundary. 1408686cdd19SJun-ichiro itojun Hagino */ 1409686cdd19SJun-ichiro itojun Hagino goto bad; 1410686cdd19SJun-ichiro itojun Hagino 1411686cdd19SJun-ichiro itojun Hagino case ICMP6_NI_SUBJ_FQDN: 1412686cdd19SJun-ichiro itojun Hagino /* 1413686cdd19SJun-ichiro itojun Hagino * Validate Subject name with gethostname(3). 1414686cdd19SJun-ichiro itojun Hagino * 1415686cdd19SJun-ichiro itojun Hagino * The behavior may need some debate, since: 1416686cdd19SJun-ichiro itojun Hagino * - we are not sure if the node has FQDN as 1417686cdd19SJun-ichiro itojun Hagino * hostname (returned by gethostname(3)). 1418686cdd19SJun-ichiro itojun Hagino * - the code does wildcard match for truncated names. 1419686cdd19SJun-ichiro itojun Hagino * however, we are not sure if we want to perform 1420686cdd19SJun-ichiro itojun Hagino * wildcard match, if gethostname(3) side has 1421686cdd19SJun-ichiro itojun Hagino * truncated hostname. 1422686cdd19SJun-ichiro itojun Hagino */ 142376ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 142476ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 1425c1f19219SJamie Gritton n = ni6_nametodns(pr->pr_hostname, 1426c1f19219SJamie Gritton strlen(pr->pr_hostname), 0); 142776ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 1428686cdd19SJun-ichiro itojun Hagino if (!n || n->m_next || n->m_len == 0) 1429686cdd19SJun-ichiro itojun Hagino goto bad; 1430686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(subj, char *, m, 1431686cdd19SJun-ichiro itojun Hagino off + sizeof(struct icmp6_nodeinfo), subjlen); 1432686cdd19SJun-ichiro itojun Hagino if (subj == NULL) 1433686cdd19SJun-ichiro itojun Hagino goto bad; 1434686cdd19SJun-ichiro itojun Hagino if (!ni6_dnsmatch(subj, subjlen, mtod(n, const char *), 1435686cdd19SJun-ichiro itojun Hagino n->m_len)) { 1436686cdd19SJun-ichiro itojun Hagino goto bad; 1437686cdd19SJun-ichiro itojun Hagino } 1438686cdd19SJun-ichiro itojun Hagino m_freem(n); 1439686cdd19SJun-ichiro itojun Hagino n = NULL; 1440686cdd19SJun-ichiro itojun Hagino break; 1441686cdd19SJun-ichiro itojun Hagino 144233841545SHajimu UMEMOTO case ICMP6_NI_SUBJ_IPV4: /* XXX: to be implemented? */ 1443686cdd19SJun-ichiro itojun Hagino default: 1444686cdd19SJun-ichiro itojun Hagino goto bad; 1445686cdd19SJun-ichiro itojun Hagino } 1446686cdd19SJun-ichiro itojun Hagino break; 1447686cdd19SJun-ichiro itojun Hagino } 1448686cdd19SJun-ichiro itojun Hagino 144933841545SHajimu UMEMOTO /* refuse based on configuration. XXX ICMP6_NI_REFUSED? */ 145033841545SHajimu UMEMOTO switch (qtype) { 145133841545SHajimu UMEMOTO case NI_QTYPE_FQDN: 1452603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_FQDNOK) == 0) 145333841545SHajimu UMEMOTO goto bad; 145433841545SHajimu UMEMOTO break; 145533841545SHajimu UMEMOTO case NI_QTYPE_NODEADDR: 1456a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1457603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_NODEADDROK) == 0) 145833841545SHajimu UMEMOTO goto bad; 145933841545SHajimu UMEMOTO break; 146033841545SHajimu UMEMOTO } 146133841545SHajimu UMEMOTO 146233841545SHajimu UMEMOTO /* guess reply length */ 146333841545SHajimu UMEMOTO switch (qtype) { 146433841545SHajimu UMEMOTO case NI_QTYPE_NOOP: 146533841545SHajimu UMEMOTO break; /* no reply data */ 146633841545SHajimu UMEMOTO case NI_QTYPE_SUPTYPES: 146733841545SHajimu UMEMOTO replylen += sizeof(u_int32_t); 146833841545SHajimu UMEMOTO break; 146933841545SHajimu UMEMOTO case NI_QTYPE_FQDN: 147033841545SHajimu UMEMOTO /* XXX will append an mbuf */ 147133841545SHajimu UMEMOTO replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen); 147233841545SHajimu UMEMOTO break; 147333841545SHajimu UMEMOTO case NI_QTYPE_NODEADDR: 1474c66b5feaSHajimu UMEMOTO addrs = ni6_addrs(ni6, m, &ifp, (struct in6_addr *)subj); 147533841545SHajimu UMEMOTO if ((replylen += addrs * (sizeof(struct in6_addr) + 147633841545SHajimu UMEMOTO sizeof(u_int32_t))) > MCLBYTES) 147733841545SHajimu UMEMOTO replylen = MCLBYTES; /* XXX: will truncate pkt later */ 147833841545SHajimu UMEMOTO break; 1479a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1480a22adbc6SSUZUKI Shinsuke /* unsupported - should respond with unknown Qtype? */ 1481a22adbc6SSUZUKI Shinsuke break; 148233841545SHajimu UMEMOTO default: 148333841545SHajimu UMEMOTO /* 148433841545SHajimu UMEMOTO * XXX: We must return a reply with the ICMP6 code 148533841545SHajimu UMEMOTO * `unknown Qtype' in this case. However we regard the case 148633841545SHajimu UMEMOTO * as an FQDN query for backward compatibility. 148733841545SHajimu UMEMOTO * Older versions set a random value to this field, 148833841545SHajimu UMEMOTO * so it rarely varies in the defined qtypes. 148933841545SHajimu UMEMOTO * But the mechanism is not reliable... 149033841545SHajimu UMEMOTO * maybe we should obsolete older versions. 149133841545SHajimu UMEMOTO */ 149233841545SHajimu UMEMOTO qtype = NI_QTYPE_FQDN; 149333841545SHajimu UMEMOTO /* XXX will append an mbuf */ 149433841545SHajimu UMEMOTO replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen); 149533841545SHajimu UMEMOTO oldfqdn++; 149633841545SHajimu UMEMOTO break; 149733841545SHajimu UMEMOTO } 149833841545SHajimu UMEMOTO 149933841545SHajimu UMEMOTO /* allocate an mbuf to reply. */ 1500a163d034SWarner Losh MGETHDR(n, M_DONTWAIT, m->m_type); 1501686cdd19SJun-ichiro itojun Hagino if (n == NULL) { 1502686cdd19SJun-ichiro itojun Hagino m_freem(m); 150382cd038dSYoshinobu Inoue return (NULL); 1504686cdd19SJun-ichiro itojun Hagino } 15059967cafcSSam Leffler M_MOVE_PKTHDR(n, m); /* just for recvif */ 150682cd038dSYoshinobu Inoue if (replylen > MHLEN) { 1507686cdd19SJun-ichiro itojun Hagino if (replylen > MCLBYTES) { 150882cd038dSYoshinobu Inoue /* 150933841545SHajimu UMEMOTO * XXX: should we try to allocate more? But MCLBYTES 151033841545SHajimu UMEMOTO * is probably much larger than IPV6_MMTU... 151182cd038dSYoshinobu Inoue */ 151282cd038dSYoshinobu Inoue goto bad; 1513686cdd19SJun-ichiro itojun Hagino } 1514a163d034SWarner Losh MCLGET(n, M_DONTWAIT); 151582cd038dSYoshinobu Inoue if ((n->m_flags & M_EXT) == 0) { 151682cd038dSYoshinobu Inoue goto bad; 151782cd038dSYoshinobu Inoue } 151882cd038dSYoshinobu Inoue } 151982cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = replylen; 152082cd038dSYoshinobu Inoue 152182cd038dSYoshinobu Inoue /* copy mbuf header and IPv6 + Node Information base headers */ 152282cd038dSYoshinobu Inoue bcopy(mtod(m, caddr_t), mtod(n, caddr_t), sizeof(struct ip6_hdr)); 152382cd038dSYoshinobu Inoue nni6 = (struct icmp6_nodeinfo *)(mtod(n, struct ip6_hdr *) + 1); 1524686cdd19SJun-ichiro itojun Hagino bcopy((caddr_t)ni6, (caddr_t)nni6, sizeof(struct icmp6_nodeinfo)); 152582cd038dSYoshinobu Inoue 152682cd038dSYoshinobu Inoue /* qtype dependent procedure */ 152782cd038dSYoshinobu Inoue switch (qtype) { 152882cd038dSYoshinobu Inoue case NI_QTYPE_NOOP: 152933841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 153082cd038dSYoshinobu Inoue nni6->ni_flags = 0; 153182cd038dSYoshinobu Inoue break; 153282cd038dSYoshinobu Inoue case NI_QTYPE_SUPTYPES: 153333841545SHajimu UMEMOTO { 153433841545SHajimu UMEMOTO u_int32_t v; 153533841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 153633841545SHajimu UMEMOTO nni6->ni_flags = htons(0x0000); /* raw bitmap */ 153733841545SHajimu UMEMOTO /* supports NOOP, SUPTYPES, FQDN, and NODEADDR */ 153833841545SHajimu UMEMOTO v = (u_int32_t)htonl(0x0000000f); 153933841545SHajimu UMEMOTO bcopy(&v, nni6 + 1, sizeof(u_int32_t)); 154082cd038dSYoshinobu Inoue break; 154133841545SHajimu UMEMOTO } 154282cd038dSYoshinobu Inoue case NI_QTYPE_FQDN: 154333841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 154482cd038dSYoshinobu Inoue fqdn = (struct ni_reply_fqdn *)(mtod(n, caddr_t) + 154506cd0a3fSHajimu UMEMOTO sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo)); 154682cd038dSYoshinobu Inoue nni6->ni_flags = 0; /* XXX: meaningless TTL */ 154782cd038dSYoshinobu Inoue fqdn->ni_fqdn_ttl = 0; /* ditto. */ 1548686cdd19SJun-ichiro itojun Hagino /* 154976ca6f88SJamie Gritton * XXX do we really have FQDN in hostname? 1550686cdd19SJun-ichiro itojun Hagino */ 155176ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 155276ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 1553c1f19219SJamie Gritton n->m_next = ni6_nametodns(pr->pr_hostname, 1554c1f19219SJamie Gritton strlen(pr->pr_hostname), oldfqdn); 155576ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 1556686cdd19SJun-ichiro itojun Hagino if (n->m_next == NULL) 1557686cdd19SJun-ichiro itojun Hagino goto bad; 1558686cdd19SJun-ichiro itojun Hagino /* XXX we assume that n->m_next is not a chain */ 1559686cdd19SJun-ichiro itojun Hagino if (n->m_next->m_next != NULL) 1560686cdd19SJun-ichiro itojun Hagino goto bad; 1561686cdd19SJun-ichiro itojun Hagino n->m_pkthdr.len += n->m_next->m_len; 156282cd038dSYoshinobu Inoue break; 156382cd038dSYoshinobu Inoue case NI_QTYPE_NODEADDR: 156482cd038dSYoshinobu Inoue { 156582cd038dSYoshinobu Inoue int lenlim, copied; 156682cd038dSYoshinobu Inoue 156733841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 156833841545SHajimu UMEMOTO n->m_pkthdr.len = n->m_len = 156933841545SHajimu UMEMOTO sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo); 157033841545SHajimu UMEMOTO lenlim = M_TRAILINGSPACE(n); 157182cd038dSYoshinobu Inoue copied = ni6_store_addrs(ni6, nni6, ifp, lenlim); 157282cd038dSYoshinobu Inoue /* XXX: reset mbuf length */ 157382cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) + 157482cd038dSYoshinobu Inoue sizeof(struct icmp6_nodeinfo) + copied; 157582cd038dSYoshinobu Inoue break; 157682cd038dSYoshinobu Inoue } 157782cd038dSYoshinobu Inoue default: 157882cd038dSYoshinobu Inoue break; /* XXX impossible! */ 157982cd038dSYoshinobu Inoue } 158082cd038dSYoshinobu Inoue 158182cd038dSYoshinobu Inoue nni6->ni_type = ICMP6_NI_REPLY; 1582686cdd19SJun-ichiro itojun Hagino m_freem(m); 158382cd038dSYoshinobu Inoue return (n); 158482cd038dSYoshinobu Inoue 158582cd038dSYoshinobu Inoue bad: 1586686cdd19SJun-ichiro itojun Hagino m_freem(m); 158782cd038dSYoshinobu Inoue if (n) 158882cd038dSYoshinobu Inoue m_freem(n); 158982cd038dSYoshinobu Inoue return (NULL); 159082cd038dSYoshinobu Inoue } 159182cd038dSYoshinobu Inoue 159282cd038dSYoshinobu Inoue /* 1593686cdd19SJun-ichiro itojun Hagino * make a mbuf with DNS-encoded string. no compression support. 1594686cdd19SJun-ichiro itojun Hagino * 1595686cdd19SJun-ichiro itojun Hagino * XXX names with less than 2 dots (like "foo" or "foo.section") will be 1596686cdd19SJun-ichiro itojun Hagino * treated as truncated name (two \0 at the end). this is a wild guess. 15971272577eSXin LI * 15981272577eSXin LI * old - return pascal string if non-zero 1599686cdd19SJun-ichiro itojun Hagino */ 1600686cdd19SJun-ichiro itojun Hagino static struct mbuf * 16011272577eSXin LI ni6_nametodns(const char *name, int namelen, int old) 1602686cdd19SJun-ichiro itojun Hagino { 1603686cdd19SJun-ichiro itojun Hagino struct mbuf *m; 1604686cdd19SJun-ichiro itojun Hagino char *cp, *ep; 1605686cdd19SJun-ichiro itojun Hagino const char *p, *q; 1606686cdd19SJun-ichiro itojun Hagino int i, len, nterm; 1607686cdd19SJun-ichiro itojun Hagino 1608686cdd19SJun-ichiro itojun Hagino if (old) 1609686cdd19SJun-ichiro itojun Hagino len = namelen + 1; 1610686cdd19SJun-ichiro itojun Hagino else 1611686cdd19SJun-ichiro itojun Hagino len = MCLBYTES; 1612686cdd19SJun-ichiro itojun Hagino 1613686cdd19SJun-ichiro itojun Hagino /* because MAXHOSTNAMELEN is usually 256, we use cluster mbuf */ 1614a163d034SWarner Losh MGET(m, M_DONTWAIT, MT_DATA); 1615686cdd19SJun-ichiro itojun Hagino if (m && len > MLEN) { 1616a163d034SWarner Losh MCLGET(m, M_DONTWAIT); 1617686cdd19SJun-ichiro itojun Hagino if ((m->m_flags & M_EXT) == 0) 1618686cdd19SJun-ichiro itojun Hagino goto fail; 1619686cdd19SJun-ichiro itojun Hagino } 1620686cdd19SJun-ichiro itojun Hagino if (!m) 1621686cdd19SJun-ichiro itojun Hagino goto fail; 1622686cdd19SJun-ichiro itojun Hagino m->m_next = NULL; 1623686cdd19SJun-ichiro itojun Hagino 1624686cdd19SJun-ichiro itojun Hagino if (old) { 1625686cdd19SJun-ichiro itojun Hagino m->m_len = len; 1626686cdd19SJun-ichiro itojun Hagino *mtod(m, char *) = namelen; 1627686cdd19SJun-ichiro itojun Hagino bcopy(name, mtod(m, char *) + 1, namelen); 1628686cdd19SJun-ichiro itojun Hagino return m; 1629686cdd19SJun-ichiro itojun Hagino } else { 1630686cdd19SJun-ichiro itojun Hagino m->m_len = 0; 1631686cdd19SJun-ichiro itojun Hagino cp = mtod(m, char *); 1632686cdd19SJun-ichiro itojun Hagino ep = mtod(m, char *) + M_TRAILINGSPACE(m); 1633686cdd19SJun-ichiro itojun Hagino 1634686cdd19SJun-ichiro itojun Hagino /* if not certain about my name, return empty buffer */ 1635686cdd19SJun-ichiro itojun Hagino if (namelen == 0) 1636686cdd19SJun-ichiro itojun Hagino return m; 1637686cdd19SJun-ichiro itojun Hagino 1638686cdd19SJun-ichiro itojun Hagino /* 1639686cdd19SJun-ichiro itojun Hagino * guess if it looks like shortened hostname, or FQDN. 1640686cdd19SJun-ichiro itojun Hagino * shortened hostname needs two trailing "\0". 1641686cdd19SJun-ichiro itojun Hagino */ 1642686cdd19SJun-ichiro itojun Hagino i = 0; 1643686cdd19SJun-ichiro itojun Hagino for (p = name; p < name + namelen; p++) { 1644686cdd19SJun-ichiro itojun Hagino if (*p && *p == '.') 1645686cdd19SJun-ichiro itojun Hagino i++; 1646686cdd19SJun-ichiro itojun Hagino } 1647686cdd19SJun-ichiro itojun Hagino if (i < 2) 1648686cdd19SJun-ichiro itojun Hagino nterm = 2; 1649686cdd19SJun-ichiro itojun Hagino else 1650686cdd19SJun-ichiro itojun Hagino nterm = 1; 1651686cdd19SJun-ichiro itojun Hagino 1652686cdd19SJun-ichiro itojun Hagino p = name; 1653686cdd19SJun-ichiro itojun Hagino while (cp < ep && p < name + namelen) { 1654686cdd19SJun-ichiro itojun Hagino i = 0; 1655686cdd19SJun-ichiro itojun Hagino for (q = p; q < name + namelen && *q && *q != '.'; q++) 1656686cdd19SJun-ichiro itojun Hagino i++; 1657686cdd19SJun-ichiro itojun Hagino /* result does not fit into mbuf */ 1658686cdd19SJun-ichiro itojun Hagino if (cp + i + 1 >= ep) 1659686cdd19SJun-ichiro itojun Hagino goto fail; 1660610be6ceSHajimu UMEMOTO /* 1661610be6ceSHajimu UMEMOTO * DNS label length restriction, RFC1035 page 8. 1662610be6ceSHajimu UMEMOTO * "i == 0" case is included here to avoid returning 1663610be6ceSHajimu UMEMOTO * 0-length label on "foo..bar". 1664610be6ceSHajimu UMEMOTO */ 1665610be6ceSHajimu UMEMOTO if (i <= 0 || i >= 64) 1666686cdd19SJun-ichiro itojun Hagino goto fail; 1667686cdd19SJun-ichiro itojun Hagino *cp++ = i; 1668686cdd19SJun-ichiro itojun Hagino bcopy(p, cp, i); 1669686cdd19SJun-ichiro itojun Hagino cp += i; 1670686cdd19SJun-ichiro itojun Hagino p = q; 1671686cdd19SJun-ichiro itojun Hagino if (p < name + namelen && *p == '.') 1672686cdd19SJun-ichiro itojun Hagino p++; 1673686cdd19SJun-ichiro itojun Hagino } 1674686cdd19SJun-ichiro itojun Hagino /* termination */ 1675686cdd19SJun-ichiro itojun Hagino if (cp + nterm >= ep) 1676686cdd19SJun-ichiro itojun Hagino goto fail; 1677686cdd19SJun-ichiro itojun Hagino while (nterm-- > 0) 1678686cdd19SJun-ichiro itojun Hagino *cp++ = '\0'; 1679686cdd19SJun-ichiro itojun Hagino m->m_len = cp - mtod(m, char *); 1680686cdd19SJun-ichiro itojun Hagino return m; 1681686cdd19SJun-ichiro itojun Hagino } 1682686cdd19SJun-ichiro itojun Hagino 1683686cdd19SJun-ichiro itojun Hagino panic("should not reach here"); 1684686cdd19SJun-ichiro itojun Hagino /* NOTREACHED */ 1685686cdd19SJun-ichiro itojun Hagino 1686686cdd19SJun-ichiro itojun Hagino fail: 1687686cdd19SJun-ichiro itojun Hagino if (m) 1688686cdd19SJun-ichiro itojun Hagino m_freem(m); 1689686cdd19SJun-ichiro itojun Hagino return NULL; 1690686cdd19SJun-ichiro itojun Hagino } 1691686cdd19SJun-ichiro itojun Hagino 1692686cdd19SJun-ichiro itojun Hagino /* 1693686cdd19SJun-ichiro itojun Hagino * check if two DNS-encoded string matches. takes care of truncated 1694686cdd19SJun-ichiro itojun Hagino * form (with \0\0 at the end). no compression support. 169533841545SHajimu UMEMOTO * XXX upper/lowercase match (see RFC2065) 1696686cdd19SJun-ichiro itojun Hagino */ 1697686cdd19SJun-ichiro itojun Hagino static int 16981272577eSXin LI ni6_dnsmatch(const char *a, int alen, const char *b, int blen) 1699686cdd19SJun-ichiro itojun Hagino { 1700686cdd19SJun-ichiro itojun Hagino const char *a0, *b0; 1701686cdd19SJun-ichiro itojun Hagino int l; 1702686cdd19SJun-ichiro itojun Hagino 1703686cdd19SJun-ichiro itojun Hagino /* simplest case - need validation? */ 1704686cdd19SJun-ichiro itojun Hagino if (alen == blen && bcmp(a, b, alen) == 0) 1705686cdd19SJun-ichiro itojun Hagino return 1; 1706686cdd19SJun-ichiro itojun Hagino 1707686cdd19SJun-ichiro itojun Hagino a0 = a; 1708686cdd19SJun-ichiro itojun Hagino b0 = b; 1709686cdd19SJun-ichiro itojun Hagino 1710686cdd19SJun-ichiro itojun Hagino /* termination is mandatory */ 1711686cdd19SJun-ichiro itojun Hagino if (alen < 2 || blen < 2) 1712686cdd19SJun-ichiro itojun Hagino return 0; 1713686cdd19SJun-ichiro itojun Hagino if (a0[alen - 1] != '\0' || b0[blen - 1] != '\0') 1714686cdd19SJun-ichiro itojun Hagino return 0; 1715686cdd19SJun-ichiro itojun Hagino alen--; 1716686cdd19SJun-ichiro itojun Hagino blen--; 1717686cdd19SJun-ichiro itojun Hagino 1718686cdd19SJun-ichiro itojun Hagino while (a - a0 < alen && b - b0 < blen) { 1719686cdd19SJun-ichiro itojun Hagino if (a - a0 + 1 > alen || b - b0 + 1 > blen) 1720686cdd19SJun-ichiro itojun Hagino return 0; 1721686cdd19SJun-ichiro itojun Hagino 1722686cdd19SJun-ichiro itojun Hagino if ((signed char)a[0] < 0 || (signed char)b[0] < 0) 1723686cdd19SJun-ichiro itojun Hagino return 0; 1724686cdd19SJun-ichiro itojun Hagino /* we don't support compression yet */ 1725686cdd19SJun-ichiro itojun Hagino if (a[0] >= 64 || b[0] >= 64) 1726686cdd19SJun-ichiro itojun Hagino return 0; 1727686cdd19SJun-ichiro itojun Hagino 1728686cdd19SJun-ichiro itojun Hagino /* truncated case */ 1729686cdd19SJun-ichiro itojun Hagino if (a[0] == 0 && a - a0 == alen - 1) 1730686cdd19SJun-ichiro itojun Hagino return 1; 1731686cdd19SJun-ichiro itojun Hagino if (b[0] == 0 && b - b0 == blen - 1) 1732686cdd19SJun-ichiro itojun Hagino return 1; 1733686cdd19SJun-ichiro itojun Hagino if (a[0] == 0 || b[0] == 0) 1734686cdd19SJun-ichiro itojun Hagino return 0; 1735686cdd19SJun-ichiro itojun Hagino 1736686cdd19SJun-ichiro itojun Hagino if (a[0] != b[0]) 1737686cdd19SJun-ichiro itojun Hagino return 0; 1738686cdd19SJun-ichiro itojun Hagino l = a[0]; 1739686cdd19SJun-ichiro itojun Hagino if (a - a0 + 1 + l > alen || b - b0 + 1 + l > blen) 1740686cdd19SJun-ichiro itojun Hagino return 0; 1741686cdd19SJun-ichiro itojun Hagino if (bcmp(a + 1, b + 1, l) != 0) 1742686cdd19SJun-ichiro itojun Hagino return 0; 1743686cdd19SJun-ichiro itojun Hagino 1744686cdd19SJun-ichiro itojun Hagino a += 1 + l; 1745686cdd19SJun-ichiro itojun Hagino b += 1 + l; 1746686cdd19SJun-ichiro itojun Hagino } 1747686cdd19SJun-ichiro itojun Hagino 1748686cdd19SJun-ichiro itojun Hagino if (a - a0 == alen && b - b0 == blen) 1749686cdd19SJun-ichiro itojun Hagino return 1; 1750686cdd19SJun-ichiro itojun Hagino else 1751686cdd19SJun-ichiro itojun Hagino return 0; 1752686cdd19SJun-ichiro itojun Hagino } 1753686cdd19SJun-ichiro itojun Hagino 1754686cdd19SJun-ichiro itojun Hagino /* 175582cd038dSYoshinobu Inoue * calculate the number of addresses to be returned in the node info reply. 175682cd038dSYoshinobu Inoue */ 175782cd038dSYoshinobu Inoue static int 17581272577eSXin LI ni6_addrs(struct icmp6_nodeinfo *ni6, struct mbuf *m, struct ifnet **ifpp, 17591272577eSXin LI struct in6_addr *subj) 176082cd038dSYoshinobu Inoue { 176133841545SHajimu UMEMOTO struct ifnet *ifp; 176233841545SHajimu UMEMOTO struct in6_ifaddr *ifa6; 176333841545SHajimu UMEMOTO struct ifaddr *ifa; 176482cd038dSYoshinobu Inoue int addrs = 0, addrsofif, iffound = 0; 176533841545SHajimu UMEMOTO int niflags = ni6->ni_flags; 176633841545SHajimu UMEMOTO 176733841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_ALL) == 0) { 176833841545SHajimu UMEMOTO switch (ni6->ni_code) { 176933841545SHajimu UMEMOTO case ICMP6_NI_SUBJ_IPV6: 177033841545SHajimu UMEMOTO if (subj == NULL) /* must be impossible... */ 177133841545SHajimu UMEMOTO return (0); 177233841545SHajimu UMEMOTO break; 177333841545SHajimu UMEMOTO default: 177433841545SHajimu UMEMOTO /* 177533841545SHajimu UMEMOTO * XXX: we only support IPv6 subject address for 177633841545SHajimu UMEMOTO * this Qtype. 177733841545SHajimu UMEMOTO */ 177833841545SHajimu UMEMOTO return (0); 177933841545SHajimu UMEMOTO } 178033841545SHajimu UMEMOTO } 178182cd038dSYoshinobu Inoue 178277dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 1783603724d3SBjoern A. Zeeb for (ifp = TAILQ_FIRST(&V_ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) { 178482cd038dSYoshinobu Inoue addrsofif = 0; 17851e1d603eSRobert Watson IF_ADDR_LOCK(ifp); 1786c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 178782cd038dSYoshinobu Inoue if (ifa->ifa_addr->sa_family != AF_INET6) 178882cd038dSYoshinobu Inoue continue; 178982cd038dSYoshinobu Inoue ifa6 = (struct in6_ifaddr *)ifa; 179082cd038dSYoshinobu Inoue 179133841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_ALL) == 0 && 1792c66b5feaSHajimu UMEMOTO IN6_ARE_ADDR_EQUAL(subj, &ifa6->ia_addr.sin6_addr)) 179382cd038dSYoshinobu Inoue iffound = 1; 179482cd038dSYoshinobu Inoue 1795686cdd19SJun-ichiro itojun Hagino /* 1796686cdd19SJun-ichiro itojun Hagino * IPv4-mapped addresses can only be returned by a 1797686cdd19SJun-ichiro itojun Hagino * Node Information proxy, since they represent 1798686cdd19SJun-ichiro itojun Hagino * addresses of IPv4-only nodes, which perforce do 1799686cdd19SJun-ichiro itojun Hagino * not implement this protocol. 180033841545SHajimu UMEMOTO * [icmp-name-lookups-07, Section 5.4] 1801686cdd19SJun-ichiro itojun Hagino * So we don't support NI_NODEADDR_FLAG_COMPAT in 1802686cdd19SJun-ichiro itojun Hagino * this function at this moment. 1803686cdd19SJun-ichiro itojun Hagino */ 1804686cdd19SJun-ichiro itojun Hagino 180582cd038dSYoshinobu Inoue /* What do we have to do about ::1? */ 180682cd038dSYoshinobu Inoue switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) { 180782cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_LINKLOCAL: 180833841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) 180933841545SHajimu UMEMOTO continue; 181082cd038dSYoshinobu Inoue break; 181182cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_SITELOCAL: 181233841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) 181333841545SHajimu UMEMOTO continue; 181482cd038dSYoshinobu Inoue break; 181582cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_GLOBAL: 181633841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) 181733841545SHajimu UMEMOTO continue; 181882cd038dSYoshinobu Inoue break; 181982cd038dSYoshinobu Inoue default: 182082cd038dSYoshinobu Inoue continue; 182182cd038dSYoshinobu Inoue } 182233841545SHajimu UMEMOTO 182333841545SHajimu UMEMOTO /* 182433841545SHajimu UMEMOTO * check if anycast is okay. 182533841545SHajimu UMEMOTO * XXX: just experimental. not in the spec. 182633841545SHajimu UMEMOTO */ 182733841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 && 182833841545SHajimu UMEMOTO (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) 182933841545SHajimu UMEMOTO continue; /* we need only unicast addresses */ 183033841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 1831603724d3SBjoern A. Zeeb (V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) { 183233841545SHajimu UMEMOTO continue; 183333841545SHajimu UMEMOTO } 183433841545SHajimu UMEMOTO addrsofif++; /* count the address */ 183582cd038dSYoshinobu Inoue } 18361e1d603eSRobert Watson IF_ADDR_UNLOCK(ifp); 183782cd038dSYoshinobu Inoue if (iffound) { 183882cd038dSYoshinobu Inoue *ifpp = ifp; 183977dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 184082cd038dSYoshinobu Inoue return (addrsofif); 184182cd038dSYoshinobu Inoue } 184282cd038dSYoshinobu Inoue 184382cd038dSYoshinobu Inoue addrs += addrsofif; 184482cd038dSYoshinobu Inoue } 184577dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 184682cd038dSYoshinobu Inoue 184782cd038dSYoshinobu Inoue return (addrs); 184882cd038dSYoshinobu Inoue } 184982cd038dSYoshinobu Inoue 185082cd038dSYoshinobu Inoue static int 18511272577eSXin LI ni6_store_addrs(struct icmp6_nodeinfo *ni6, struct icmp6_nodeinfo *nni6, 18521272577eSXin LI struct ifnet *ifp0, int resid) 185382cd038dSYoshinobu Inoue { 1854*94e83133SJohn Baldwin struct ifnet *ifp; 185533841545SHajimu UMEMOTO struct in6_ifaddr *ifa6; 185633841545SHajimu UMEMOTO struct ifaddr *ifa; 185733841545SHajimu UMEMOTO struct ifnet *ifp_dep = NULL; 185833841545SHajimu UMEMOTO int copied = 0, allow_deprecated = 0; 185982cd038dSYoshinobu Inoue u_char *cp = (u_char *)(nni6 + 1); 186033841545SHajimu UMEMOTO int niflags = ni6->ni_flags; 186133841545SHajimu UMEMOTO u_int32_t ltime; 186282cd038dSYoshinobu Inoue 186333841545SHajimu UMEMOTO if (ifp0 == NULL && !(niflags & NI_NODEADDR_FLAG_ALL)) 186482cd038dSYoshinobu Inoue return (0); /* needless to copy */ 186582cd038dSYoshinobu Inoue 186677dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 1867*94e83133SJohn Baldwin ifp = ifp0 ? ifp0 : TAILQ_FIRST(&V_ifnet); 186833841545SHajimu UMEMOTO again: 18690527d333SHajimu UMEMOTO 187006cd0a3fSHajimu UMEMOTO for (; ifp; ifp = TAILQ_NEXT(ifp, if_list)) { 18711e1d603eSRobert Watson IF_ADDR_LOCK(ifp); 1872c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 187382cd038dSYoshinobu Inoue if (ifa->ifa_addr->sa_family != AF_INET6) 187482cd038dSYoshinobu Inoue continue; 187582cd038dSYoshinobu Inoue ifa6 = (struct in6_ifaddr *)ifa; 187682cd038dSYoshinobu Inoue 187733841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) != 0 && 187833841545SHajimu UMEMOTO allow_deprecated == 0) { 187933841545SHajimu UMEMOTO /* 188033841545SHajimu UMEMOTO * prefererred address should be put before 188133841545SHajimu UMEMOTO * deprecated addresses. 188233841545SHajimu UMEMOTO */ 188333841545SHajimu UMEMOTO 188433841545SHajimu UMEMOTO /* record the interface for later search */ 188533841545SHajimu UMEMOTO if (ifp_dep == NULL) 188633841545SHajimu UMEMOTO ifp_dep = ifp; 188733841545SHajimu UMEMOTO 188882cd038dSYoshinobu Inoue continue; 188906cd0a3fSHajimu UMEMOTO } else if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) == 0 && 189033841545SHajimu UMEMOTO allow_deprecated != 0) 189133841545SHajimu UMEMOTO continue; /* we now collect deprecated addrs */ 189282cd038dSYoshinobu Inoue 189382cd038dSYoshinobu Inoue /* What do we have to do about ::1? */ 189482cd038dSYoshinobu Inoue switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) { 189582cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_LINKLOCAL: 189633841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) 189733841545SHajimu UMEMOTO continue; 189882cd038dSYoshinobu Inoue break; 189982cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_SITELOCAL: 190033841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) 190133841545SHajimu UMEMOTO continue; 190282cd038dSYoshinobu Inoue break; 190382cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_GLOBAL: 190433841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) 190533841545SHajimu UMEMOTO continue; 190682cd038dSYoshinobu Inoue break; 190782cd038dSYoshinobu Inoue default: 190882cd038dSYoshinobu Inoue continue; 190982cd038dSYoshinobu Inoue } 191082cd038dSYoshinobu Inoue 191133841545SHajimu UMEMOTO /* 191233841545SHajimu UMEMOTO * check if anycast is okay. 191333841545SHajimu UMEMOTO * XXX: just experimental. not in the spec. 191433841545SHajimu UMEMOTO */ 191533841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 && 191633841545SHajimu UMEMOTO (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) 191733841545SHajimu UMEMOTO continue; 191833841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 1919603724d3SBjoern A. Zeeb (V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) { 192033841545SHajimu UMEMOTO continue; 192133841545SHajimu UMEMOTO } 192233841545SHajimu UMEMOTO 192333841545SHajimu UMEMOTO /* now we can copy the address */ 192433841545SHajimu UMEMOTO if (resid < sizeof(struct in6_addr) + 192533841545SHajimu UMEMOTO sizeof(u_int32_t)) { 19261e1d603eSRobert Watson IF_ADDR_UNLOCK(ifp); 192782cd038dSYoshinobu Inoue /* 192882cd038dSYoshinobu Inoue * We give up much more copy. 192982cd038dSYoshinobu Inoue * Set the truncate flag and return. 193082cd038dSYoshinobu Inoue */ 193106cd0a3fSHajimu UMEMOTO nni6->ni_flags |= NI_NODEADDR_FLAG_TRUNCATE; 193277dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 193382cd038dSYoshinobu Inoue return (copied); 193482cd038dSYoshinobu Inoue } 193533841545SHajimu UMEMOTO 193633841545SHajimu UMEMOTO /* 193733841545SHajimu UMEMOTO * Set the TTL of the address. 193833841545SHajimu UMEMOTO * The TTL value should be one of the following 193933841545SHajimu UMEMOTO * according to the specification: 194033841545SHajimu UMEMOTO * 194133841545SHajimu UMEMOTO * 1. The remaining lifetime of a DHCP lease on the 194233841545SHajimu UMEMOTO * address, or 194333841545SHajimu UMEMOTO * 2. The remaining Valid Lifetime of a prefix from 194433841545SHajimu UMEMOTO * which the address was derived through Stateless 194533841545SHajimu UMEMOTO * Autoconfiguration. 194633841545SHajimu UMEMOTO * 194733841545SHajimu UMEMOTO * Note that we currently do not support stateful 194833841545SHajimu UMEMOTO * address configuration by DHCPv6, so the former 194933841545SHajimu UMEMOTO * case can't happen. 195033841545SHajimu UMEMOTO */ 195133841545SHajimu UMEMOTO if (ifa6->ia6_lifetime.ia6t_expire == 0) 195233841545SHajimu UMEMOTO ltime = ND6_INFINITE_LIFETIME; 195333841545SHajimu UMEMOTO else { 195433841545SHajimu UMEMOTO if (ifa6->ia6_lifetime.ia6t_expire > 195533841545SHajimu UMEMOTO time_second) 195633841545SHajimu UMEMOTO ltime = htonl(ifa6->ia6_lifetime.ia6t_expire - time_second); 195733841545SHajimu UMEMOTO else 195833841545SHajimu UMEMOTO ltime = 0; 195933841545SHajimu UMEMOTO } 196033841545SHajimu UMEMOTO 196133841545SHajimu UMEMOTO bcopy(<ime, cp, sizeof(u_int32_t)); 196233841545SHajimu UMEMOTO cp += sizeof(u_int32_t); 196333841545SHajimu UMEMOTO 196433841545SHajimu UMEMOTO /* copy the address itself */ 196582cd038dSYoshinobu Inoue bcopy(&ifa6->ia_addr.sin6_addr, cp, 196682cd038dSYoshinobu Inoue sizeof(struct in6_addr)); 19679a4f9608SHajimu UMEMOTO in6_clearscope((struct in6_addr *)cp); /* XXX */ 196882cd038dSYoshinobu Inoue cp += sizeof(struct in6_addr); 196933841545SHajimu UMEMOTO 197033841545SHajimu UMEMOTO resid -= (sizeof(struct in6_addr) + sizeof(u_int32_t)); 197106cd0a3fSHajimu UMEMOTO copied += (sizeof(struct in6_addr) + sizeof(u_int32_t)); 197282cd038dSYoshinobu Inoue } 19731e1d603eSRobert Watson IF_ADDR_UNLOCK(ifp); 197482cd038dSYoshinobu Inoue if (ifp0) /* we need search only on the specified IF */ 197582cd038dSYoshinobu Inoue break; 197682cd038dSYoshinobu Inoue } 197782cd038dSYoshinobu Inoue 197833841545SHajimu UMEMOTO if (allow_deprecated == 0 && ifp_dep != NULL) { 197933841545SHajimu UMEMOTO ifp = ifp_dep; 198033841545SHajimu UMEMOTO allow_deprecated = 1; 198133841545SHajimu UMEMOTO 198233841545SHajimu UMEMOTO goto again; 198333841545SHajimu UMEMOTO } 198433841545SHajimu UMEMOTO 198577dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 1986b30a244cSJeffrey Hsu 198782cd038dSYoshinobu Inoue return (copied); 198882cd038dSYoshinobu Inoue } 198982cd038dSYoshinobu Inoue 199082cd038dSYoshinobu Inoue /* 199182cd038dSYoshinobu Inoue * XXX almost dup'ed code with rip6_input. 199282cd038dSYoshinobu Inoue */ 199382cd038dSYoshinobu Inoue static int 19941272577eSXin LI icmp6_rip6_input(struct mbuf **mp, int off) 199582cd038dSYoshinobu Inoue { 199682cd038dSYoshinobu Inoue struct mbuf *m = *mp; 199733841545SHajimu UMEMOTO struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1998fc384fa5SBjoern A. Zeeb struct inpcb *in6p; 1999fc384fa5SBjoern A. Zeeb struct inpcb *last = NULL; 20009a4f9608SHajimu UMEMOTO struct sockaddr_in6 fromsa; 200182cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 200282cd038dSYoshinobu Inoue struct mbuf *opts = NULL; 200382cd038dSYoshinobu Inoue 2004686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 200582cd038dSYoshinobu Inoue /* this is assumed to be safe. */ 200682cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off); 2007686cdd19SJun-ichiro itojun Hagino #else 2008686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6)); 2009686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 2010686cdd19SJun-ichiro itojun Hagino /* m is already reclaimed */ 201106cd0a3fSHajimu UMEMOTO return (IPPROTO_DONE); 2012686cdd19SJun-ichiro itojun Hagino } 2013686cdd19SJun-ichiro itojun Hagino #endif 201482cd038dSYoshinobu Inoue 2015a1f7e5f8SHajimu UMEMOTO /* 2016a1f7e5f8SHajimu UMEMOTO * XXX: the address may have embedded scope zone ID, which should be 2017a1f7e5f8SHajimu UMEMOTO * hidden from applications. 2018a1f7e5f8SHajimu UMEMOTO */ 20199a4f9608SHajimu UMEMOTO bzero(&fromsa, sizeof(fromsa)); 20209a4f9608SHajimu UMEMOTO fromsa.sin6_family = AF_INET6; 2021a1f7e5f8SHajimu UMEMOTO fromsa.sin6_len = sizeof(struct sockaddr_in6); 2022a1f7e5f8SHajimu UMEMOTO fromsa.sin6_addr = ip6->ip6_src; 2023a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&fromsa)) { 2024a1f7e5f8SHajimu UMEMOTO m_freem(m); 2025a1f7e5f8SHajimu UMEMOTO return (IPPROTO_DONE); 2026a1f7e5f8SHajimu UMEMOTO } 202782cd038dSYoshinobu Inoue 2028603724d3SBjoern A. Zeeb INP_INFO_RLOCK(&V_ripcbinfo); 2029603724d3SBjoern A. Zeeb LIST_FOREACH(in6p, &V_ripcb, inp_list) { 2030b11e21aeSAlexander Motin if ((in6p->inp_vflag & INP_IPV6) == 0) 203182cd038dSYoshinobu Inoue continue; 2032fc384fa5SBjoern A. Zeeb if (in6p->inp_ip_p != IPPROTO_ICMPV6) 2033b11e21aeSAlexander Motin continue; 203482cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 203582cd038dSYoshinobu Inoue !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 2036b11e21aeSAlexander Motin continue; 203782cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 203882cd038dSYoshinobu Inoue !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 2039b11e21aeSAlexander Motin continue; 20406c5bbf5cSAlexander Motin INP_RLOCK(in6p); 20412f1ff0cdSRobert Watson if (ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type, 20426c5bbf5cSAlexander Motin in6p->in6p_icmp6filt)) { 20436c5bbf5cSAlexander Motin INP_RUNLOCK(in6p); 2044b11e21aeSAlexander Motin continue; 20456c5bbf5cSAlexander Motin } 2046aba53ef0SKip Macy if (last != NULL) { 2047657db3c8SHajimu UMEMOTO struct mbuf *n = NULL; 2048657db3c8SHajimu UMEMOTO 2049657db3c8SHajimu UMEMOTO /* 2050657db3c8SHajimu UMEMOTO * Recent network drivers tend to allocate a single 2051657db3c8SHajimu UMEMOTO * mbuf cluster, rather than to make a couple of 2052657db3c8SHajimu UMEMOTO * mbufs without clusters. Also, since the IPv6 code 2053657db3c8SHajimu UMEMOTO * path tries to avoid m_pullup(), it is highly 2054657db3c8SHajimu UMEMOTO * probable that we still have an mbuf cluster here 2055657db3c8SHajimu UMEMOTO * even though the necessary length can be stored in an 2056657db3c8SHajimu UMEMOTO * mbuf's internal buffer. 2057657db3c8SHajimu UMEMOTO * Meanwhile, the default size of the receive socket 2058657db3c8SHajimu UMEMOTO * buffer for raw sockets is not so large. This means 2059657db3c8SHajimu UMEMOTO * the possibility of packet loss is relatively higher 2060657db3c8SHajimu UMEMOTO * than before. To avoid this scenario, we copy the 2061657db3c8SHajimu UMEMOTO * received data to a separate mbuf that does not use 2062657db3c8SHajimu UMEMOTO * a cluster, if possible. 2063657db3c8SHajimu UMEMOTO * XXX: it is better to copy the data after stripping 2064657db3c8SHajimu UMEMOTO * intermediate headers. 2065657db3c8SHajimu UMEMOTO */ 2066657db3c8SHajimu UMEMOTO if ((m->m_flags & M_EXT) && m->m_next == NULL && 2067657db3c8SHajimu UMEMOTO m->m_len <= MHLEN) { 2068657db3c8SHajimu UMEMOTO MGET(n, M_DONTWAIT, m->m_type); 2069657db3c8SHajimu UMEMOTO if (n != NULL) { 2070c543ec4eSGeorge V. Neville-Neil if (m_dup_pkthdr(n, m, M_NOWAIT)) { 2071c543ec4eSGeorge V. Neville-Neil bcopy(m->m_data, n->m_data, 2072c543ec4eSGeorge V. Neville-Neil m->m_len); 2073657db3c8SHajimu UMEMOTO n->m_len = m->m_len; 2074c543ec4eSGeorge V. Neville-Neil } else { 2075c543ec4eSGeorge V. Neville-Neil m_free(n); 2076c543ec4eSGeorge V. Neville-Neil n = NULL; 2077c543ec4eSGeorge V. Neville-Neil } 2078657db3c8SHajimu UMEMOTO } 2079657db3c8SHajimu UMEMOTO } 2080657db3c8SHajimu UMEMOTO if (n != NULL || 2081657db3c8SHajimu UMEMOTO (n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 208297590249SBjoern A. Zeeb if (last->inp_flags & INP_CONTROLOPTS) 208311de19f4SHajimu UMEMOTO ip6_savecontrol(last, n, &opts); 208482cd038dSYoshinobu Inoue /* strip intermediate headers */ 208582cd038dSYoshinobu Inoue m_adj(n, off); 2086fc384fa5SBjoern A. Zeeb SOCKBUF_LOCK(&last->inp_socket->so_rcv); 2087c9db0fadSRobert Watson if (sbappendaddr_locked( 2088fc384fa5SBjoern A. Zeeb &last->inp_socket->so_rcv, 20899a4f9608SHajimu UMEMOTO (struct sockaddr *)&fromsa, n, opts) 209006cd0a3fSHajimu UMEMOTO == 0) { 209182cd038dSYoshinobu Inoue /* should notify about lost packet */ 209282cd038dSYoshinobu Inoue m_freem(n); 209333841545SHajimu UMEMOTO if (opts) { 209482cd038dSYoshinobu Inoue m_freem(opts); 209533841545SHajimu UMEMOTO } 2096c9db0fadSRobert Watson SOCKBUF_UNLOCK( 2097fc384fa5SBjoern A. Zeeb &last->inp_socket->so_rcv); 20984cc20ab1SSeigo Tanimura } else 2099fc384fa5SBjoern A. Zeeb sorwakeup_locked(last->inp_socket); 210082cd038dSYoshinobu Inoue opts = NULL; 210182cd038dSYoshinobu Inoue } 2102bb145f60SRobert Watson INP_RUNLOCK(last); 210382cd038dSYoshinobu Inoue } 210482cd038dSYoshinobu Inoue last = in6p; 210582cd038dSYoshinobu Inoue } 2106603724d3SBjoern A. Zeeb INP_INFO_RUNLOCK(&V_ripcbinfo); 2107aba53ef0SKip Macy if (last != NULL) { 210897590249SBjoern A. Zeeb if (last->inp_flags & INP_CONTROLOPTS) 210911de19f4SHajimu UMEMOTO ip6_savecontrol(last, m, &opts); 211082cd038dSYoshinobu Inoue /* strip intermediate headers */ 211182cd038dSYoshinobu Inoue m_adj(m, off); 2112657db3c8SHajimu UMEMOTO 2113657db3c8SHajimu UMEMOTO /* avoid using mbuf clusters if possible (see above) */ 2114657db3c8SHajimu UMEMOTO if ((m->m_flags & M_EXT) && m->m_next == NULL && 2115657db3c8SHajimu UMEMOTO m->m_len <= MHLEN) { 2116657db3c8SHajimu UMEMOTO struct mbuf *n; 2117657db3c8SHajimu UMEMOTO 2118657db3c8SHajimu UMEMOTO MGET(n, M_DONTWAIT, m->m_type); 2119657db3c8SHajimu UMEMOTO if (n != NULL) { 2120c543ec4eSGeorge V. Neville-Neil if (m_dup_pkthdr(n, m, M_NOWAIT)) { 2121657db3c8SHajimu UMEMOTO bcopy(m->m_data, n->m_data, m->m_len); 2122657db3c8SHajimu UMEMOTO n->m_len = m->m_len; 2123657db3c8SHajimu UMEMOTO 2124657db3c8SHajimu UMEMOTO m_freem(m); 2125657db3c8SHajimu UMEMOTO m = n; 2126c543ec4eSGeorge V. Neville-Neil } else { 2127c543ec4eSGeorge V. Neville-Neil m_freem(n); 2128c543ec4eSGeorge V. Neville-Neil n = NULL; 2129c543ec4eSGeorge V. Neville-Neil } 2130657db3c8SHajimu UMEMOTO } 2131657db3c8SHajimu UMEMOTO } 2132fc384fa5SBjoern A. Zeeb SOCKBUF_LOCK(&last->inp_socket->so_rcv); 2133fc384fa5SBjoern A. Zeeb if (sbappendaddr_locked(&last->inp_socket->so_rcv, 21349a4f9608SHajimu UMEMOTO (struct sockaddr *)&fromsa, m, opts) == 0) { 213582cd038dSYoshinobu Inoue m_freem(m); 213682cd038dSYoshinobu Inoue if (opts) 213782cd038dSYoshinobu Inoue m_freem(opts); 2138fc384fa5SBjoern A. Zeeb SOCKBUF_UNLOCK(&last->inp_socket->so_rcv); 21394cc20ab1SSeigo Tanimura } else 2140fc384fa5SBjoern A. Zeeb sorwakeup_locked(last->inp_socket); 2141bb145f60SRobert Watson INP_RUNLOCK(last); 214282cd038dSYoshinobu Inoue } else { 214382cd038dSYoshinobu Inoue m_freem(m); 214433cde130SBruce M Simpson IP6STAT_DEC(ip6s_delivered); 214582cd038dSYoshinobu Inoue } 214682cd038dSYoshinobu Inoue return IPPROTO_DONE; 214782cd038dSYoshinobu Inoue } 214882cd038dSYoshinobu Inoue 214982cd038dSYoshinobu Inoue /* 215082cd038dSYoshinobu Inoue * Reflect the ip6 packet back to the source. 2151686cdd19SJun-ichiro itojun Hagino * OFF points to the icmp6 header, counted from the top of the mbuf. 215282cd038dSYoshinobu Inoue */ 215382cd038dSYoshinobu Inoue void 21541272577eSXin LI icmp6_reflect(struct mbuf *m, size_t off) 215582cd038dSYoshinobu Inoue { 2156686cdd19SJun-ichiro itojun Hagino struct ip6_hdr *ip6; 215782cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 21588c0fec80SRobert Watson struct in6_ifaddr *ia = NULL; 2159686cdd19SJun-ichiro itojun Hagino int plen; 216082cd038dSYoshinobu Inoue int type, code; 216182cd038dSYoshinobu Inoue struct ifnet *outif = NULL; 216288d166bfSBjoern A. Zeeb struct in6_addr origdst, src, *srcp = NULL; 216382cd038dSYoshinobu Inoue 2164686cdd19SJun-ichiro itojun Hagino /* too short to reflect */ 2165686cdd19SJun-ichiro itojun Hagino if (off < sizeof(struct ip6_hdr)) { 216633841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 216733841545SHajimu UMEMOTO "sanity fail: off=%lx, sizeof(ip6)=%lx in %s:%d\n", 2168686cdd19SJun-ichiro itojun Hagino (u_long)off, (u_long)sizeof(struct ip6_hdr), 216933841545SHajimu UMEMOTO __FILE__, __LINE__)); 2170686cdd19SJun-ichiro itojun Hagino goto bad; 2171686cdd19SJun-ichiro itojun Hagino } 2172686cdd19SJun-ichiro itojun Hagino 217382cd038dSYoshinobu Inoue /* 217482cd038dSYoshinobu Inoue * If there are extra headers between IPv6 and ICMPv6, strip 217582cd038dSYoshinobu Inoue * off that header first. 217682cd038dSYoshinobu Inoue */ 2177686cdd19SJun-ichiro itojun Hagino #ifdef DIAGNOSTIC 2178686cdd19SJun-ichiro itojun Hagino if (sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) > MHLEN) 2179686cdd19SJun-ichiro itojun Hagino panic("assumption failed in icmp6_reflect"); 2180686cdd19SJun-ichiro itojun Hagino #endif 2181686cdd19SJun-ichiro itojun Hagino if (off > sizeof(struct ip6_hdr)) { 2182686cdd19SJun-ichiro itojun Hagino size_t l; 2183686cdd19SJun-ichiro itojun Hagino struct ip6_hdr nip6; 218482cd038dSYoshinobu Inoue 2185686cdd19SJun-ichiro itojun Hagino l = off - sizeof(struct ip6_hdr); 2186686cdd19SJun-ichiro itojun Hagino m_copydata(m, 0, sizeof(nip6), (caddr_t)&nip6); 2187686cdd19SJun-ichiro itojun Hagino m_adj(m, l); 2188686cdd19SJun-ichiro itojun Hagino l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 2189686cdd19SJun-ichiro itojun Hagino if (m->m_len < l) { 2190686cdd19SJun-ichiro itojun Hagino if ((m = m_pullup(m, l)) == NULL) 2191686cdd19SJun-ichiro itojun Hagino return; 219282cd038dSYoshinobu Inoue } 2193686cdd19SJun-ichiro itojun Hagino bcopy((caddr_t)&nip6, mtod(m, caddr_t), sizeof(nip6)); 2194686cdd19SJun-ichiro itojun Hagino } else /* off == sizeof(struct ip6_hdr) */ { 2195686cdd19SJun-ichiro itojun Hagino size_t l; 2196686cdd19SJun-ichiro itojun Hagino l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 2197686cdd19SJun-ichiro itojun Hagino if (m->m_len < l) { 2198686cdd19SJun-ichiro itojun Hagino if ((m = m_pullup(m, l)) == NULL) 2199686cdd19SJun-ichiro itojun Hagino return; 220082cd038dSYoshinobu Inoue } 2201686cdd19SJun-ichiro itojun Hagino } 2202686cdd19SJun-ichiro itojun Hagino plen = m->m_pkthdr.len - sizeof(struct ip6_hdr); 220382cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 220482cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 220582cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(ip6 + 1); 220682cd038dSYoshinobu Inoue type = icmp6->icmp6_type; /* keep type for statistics */ 220782cd038dSYoshinobu Inoue code = icmp6->icmp6_code; /* ditto. */ 220882cd038dSYoshinobu Inoue 2209a1f7e5f8SHajimu UMEMOTO origdst = ip6->ip6_dst; 221082cd038dSYoshinobu Inoue /* 221182cd038dSYoshinobu Inoue * ip6_input() drops a packet if its src is multicast. 221282cd038dSYoshinobu Inoue * So, the src is never multicast. 221382cd038dSYoshinobu Inoue */ 221482cd038dSYoshinobu Inoue ip6->ip6_dst = ip6->ip6_src; 221582cd038dSYoshinobu Inoue 221682cd038dSYoshinobu Inoue /* 221782cd038dSYoshinobu Inoue * If the incoming packet was addressed directly to us (i.e. unicast), 221882cd038dSYoshinobu Inoue * use dst as the src for the reply. 221906cd0a3fSHajimu UMEMOTO * The IN6_IFF_NOTREADY case should be VERY rare, but is possible 2220686cdd19SJun-ichiro itojun Hagino * (for example) when we encounter an error while forwarding procedure 2221686cdd19SJun-ichiro itojun Hagino * destined to a duplicated address of ours. 2222a1f7e5f8SHajimu UMEMOTO * Note that ip6_getdstifaddr() may fail if we are in an error handling 2223a1f7e5f8SHajimu UMEMOTO * procedure of an outgoing packet of our own, in which case we need 2224a1f7e5f8SHajimu UMEMOTO * to search in the ifaddr list. 222582cd038dSYoshinobu Inoue */ 2226a1f7e5f8SHajimu UMEMOTO if (!IN6_IS_ADDR_MULTICAST(&origdst)) { 2227a1f7e5f8SHajimu UMEMOTO if ((ia = ip6_getdstifaddr(m))) { 2228a1f7e5f8SHajimu UMEMOTO if (!(ia->ia6_flags & 2229a1f7e5f8SHajimu UMEMOTO (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY))) 223088d166bfSBjoern A. Zeeb srcp = &ia->ia_addr.sin6_addr; 2231a1f7e5f8SHajimu UMEMOTO } else { 2232a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 d; 2233a1f7e5f8SHajimu UMEMOTO 2234a1f7e5f8SHajimu UMEMOTO bzero(&d, sizeof(d)); 2235a1f7e5f8SHajimu UMEMOTO d.sin6_family = AF_INET6; 2236a1f7e5f8SHajimu UMEMOTO d.sin6_len = sizeof(d); 2237a1f7e5f8SHajimu UMEMOTO d.sin6_addr = origdst; 2238a1f7e5f8SHajimu UMEMOTO ia = (struct in6_ifaddr *) 2239a1f7e5f8SHajimu UMEMOTO ifa_ifwithaddr((struct sockaddr *)&d); 2240a1f7e5f8SHajimu UMEMOTO if (ia && 2241a1f7e5f8SHajimu UMEMOTO !(ia->ia6_flags & 2242a1f7e5f8SHajimu UMEMOTO (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY))) { 224388d166bfSBjoern A. Zeeb srcp = &ia->ia_addr.sin6_addr; 224482cd038dSYoshinobu Inoue } 2245a1f7e5f8SHajimu UMEMOTO } 224682cd038dSYoshinobu Inoue } 224782cd038dSYoshinobu Inoue 224888d166bfSBjoern A. Zeeb if (srcp == NULL) { 224933841545SHajimu UMEMOTO int e; 2250a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6; 225133841545SHajimu UMEMOTO struct route_in6 ro; 225233841545SHajimu UMEMOTO 225382cd038dSYoshinobu Inoue /* 2254686cdd19SJun-ichiro itojun Hagino * This case matches to multicasts, our anycast, or unicasts 225533841545SHajimu UMEMOTO * that we do not own. Select a source address based on the 225633841545SHajimu UMEMOTO * source address of the erroneous packet. 225782cd038dSYoshinobu Inoue */ 2258a1f7e5f8SHajimu UMEMOTO bzero(&sin6, sizeof(sin6)); 2259a1f7e5f8SHajimu UMEMOTO sin6.sin6_family = AF_INET6; 2260a1f7e5f8SHajimu UMEMOTO sin6.sin6_len = sizeof(sin6); 2261a1f7e5f8SHajimu UMEMOTO sin6.sin6_addr = ip6->ip6_dst; /* zone ID should be embedded */ 2262a1f7e5f8SHajimu UMEMOTO 226333841545SHajimu UMEMOTO bzero(&ro, sizeof(ro)); 226488d166bfSBjoern A. Zeeb e = in6_selectsrc(&sin6, NULL, NULL, &ro, NULL, &outif, &src); 226533841545SHajimu UMEMOTO if (ro.ro_rt) 226633841545SHajimu UMEMOTO RTFREE(ro.ro_rt); /* XXX: we could use this */ 226788d166bfSBjoern A. Zeeb if (e) { 22681d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 226933841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 227033841545SHajimu UMEMOTO "icmp6_reflect: source can't be determined: " 227133841545SHajimu UMEMOTO "dst=%s, error=%d\n", 22721d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &sin6.sin6_addr), e)); 227382cd038dSYoshinobu Inoue goto bad; 227433841545SHajimu UMEMOTO } 227588d166bfSBjoern A. Zeeb srcp = &src; 227633841545SHajimu UMEMOTO } 227782cd038dSYoshinobu Inoue 227888d166bfSBjoern A. Zeeb ip6->ip6_src = *srcp; 227982cd038dSYoshinobu Inoue ip6->ip6_flow = 0; 2280686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 2281686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc |= IPV6_VERSION; 228282cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 2283f95d4633SHajimu UMEMOTO if (outif) 2284f95d4633SHajimu UMEMOTO ip6->ip6_hlim = ND_IFINFO(outif)->chlim; 2285f95d4633SHajimu UMEMOTO else if (m->m_pkthdr.rcvif) { 228682cd038dSYoshinobu Inoue /* XXX: This may not be the outgoing interface */ 228731b1bfe1SHajimu UMEMOTO ip6->ip6_hlim = ND_IFINFO(m->m_pkthdr.rcvif)->chlim; 228833841545SHajimu UMEMOTO } else 2289603724d3SBjoern A. Zeeb ip6->ip6_hlim = V_ip6_defhlim; 229082cd038dSYoshinobu Inoue 229182cd038dSYoshinobu Inoue icmp6->icmp6_cksum = 0; 229282cd038dSYoshinobu Inoue icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6, 229382cd038dSYoshinobu Inoue sizeof(struct ip6_hdr), plen); 229482cd038dSYoshinobu Inoue 229582cd038dSYoshinobu Inoue /* 229633841545SHajimu UMEMOTO * XXX option handling 229782cd038dSYoshinobu Inoue */ 229882cd038dSYoshinobu Inoue 229982cd038dSYoshinobu Inoue m->m_flags &= ~(M_BCAST|M_MCAST); 230082cd038dSYoshinobu Inoue 2301e0bfbfceSBjoern A. Zeeb m_addr_changed(m); 2302e0bfbfceSBjoern A. Zeeb 23035d846453SSam Leffler ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL); 230482cd038dSYoshinobu Inoue if (outif) 230582cd038dSYoshinobu Inoue icmp6_ifoutstat_inc(outif, type, code); 230682cd038dSYoshinobu Inoue 23078c0fec80SRobert Watson if (ia != NULL) 23088c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 230982cd038dSYoshinobu Inoue return; 231082cd038dSYoshinobu Inoue 231182cd038dSYoshinobu Inoue bad: 23128c0fec80SRobert Watson if (ia != NULL) 23138c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 231482cd038dSYoshinobu Inoue m_freem(m); 231582cd038dSYoshinobu Inoue return; 231682cd038dSYoshinobu Inoue } 231782cd038dSYoshinobu Inoue 231882cd038dSYoshinobu Inoue void 23191272577eSXin LI icmp6_fasttimo(void) 232082cd038dSYoshinobu Inoue { 2321686cdd19SJun-ichiro itojun Hagino 232233cde130SBruce M Simpson mld_fasttimo(); 232333cde130SBruce M Simpson } 232433cde130SBruce M Simpson 232533cde130SBruce M Simpson void 232633cde130SBruce M Simpson icmp6_slowtimo(void) 232733cde130SBruce M Simpson { 232833cde130SBruce M Simpson 232933cde130SBruce M Simpson mld_slowtimo(); 233082cd038dSYoshinobu Inoue } 233182cd038dSYoshinobu Inoue 233282cd038dSYoshinobu Inoue static const char * 23331272577eSXin LI icmp6_redirect_diag(struct in6_addr *src6, struct in6_addr *dst6, 23341272577eSXin LI struct in6_addr *tgt6) 233582cd038dSYoshinobu Inoue { 233682cd038dSYoshinobu Inoue static char buf[1024]; 23371d54aa3bSBjoern A. Zeeb char ip6bufs[INET6_ADDRSTRLEN]; 23381d54aa3bSBjoern A. Zeeb char ip6bufd[INET6_ADDRSTRLEN]; 23391d54aa3bSBjoern A. Zeeb char ip6buft[INET6_ADDRSTRLEN]; 234082cd038dSYoshinobu Inoue snprintf(buf, sizeof(buf), "(src=%s dst=%s tgt=%s)", 23411d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6bufs, src6), ip6_sprintf(ip6bufd, dst6), 23421d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buft, tgt6)); 234382cd038dSYoshinobu Inoue return buf; 234482cd038dSYoshinobu Inoue } 234582cd038dSYoshinobu Inoue 234682cd038dSYoshinobu Inoue void 23471272577eSXin LI icmp6_redirect_input(struct mbuf *m, int off) 234882cd038dSYoshinobu Inoue { 23492cb64cb2SGeorge V. Neville-Neil struct ifnet *ifp; 235082cd038dSYoshinobu Inoue struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 2351686cdd19SJun-ichiro itojun Hagino struct nd_redirect *nd_rd; 235282cd038dSYoshinobu Inoue int icmp6len = ntohs(ip6->ip6_plen); 235382cd038dSYoshinobu Inoue char *lladdr = NULL; 235482cd038dSYoshinobu Inoue int lladdrlen = 0; 235582cd038dSYoshinobu Inoue struct rtentry *rt = NULL; 235682cd038dSYoshinobu Inoue int is_router; 235782cd038dSYoshinobu Inoue int is_onlink; 235882cd038dSYoshinobu Inoue struct in6_addr src6 = ip6->ip6_src; 2359686cdd19SJun-ichiro itojun Hagino struct in6_addr redtgt6; 2360686cdd19SJun-ichiro itojun Hagino struct in6_addr reddst6; 236182cd038dSYoshinobu Inoue union nd_opts ndopts; 23621d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 236382cd038dSYoshinobu Inoue 236437c1ff48SGleb Smirnoff M_ASSERTPKTHDR(m); 236537c1ff48SGleb Smirnoff KASSERT(m->m_pkthdr.rcvif != NULL, ("%s: no rcvif", __func__)); 23662cb64cb2SGeorge V. Neville-Neil 23672cb64cb2SGeorge V. Neville-Neil ifp = m->m_pkthdr.rcvif; 23682cb64cb2SGeorge V. Neville-Neil 236982cd038dSYoshinobu Inoue /* XXX if we are router, we don't update route by icmp6 redirect */ 2370603724d3SBjoern A. Zeeb if (V_ip6_forwarding) 2371686cdd19SJun-ichiro itojun Hagino goto freeit; 2372603724d3SBjoern A. Zeeb if (!V_icmp6_rediraccept) 2373686cdd19SJun-ichiro itojun Hagino goto freeit; 2374686cdd19SJun-ichiro itojun Hagino 2375686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 2376686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, off, icmp6len,); 2377686cdd19SJun-ichiro itojun Hagino nd_rd = (struct nd_redirect *)((caddr_t)ip6 + off); 2378686cdd19SJun-ichiro itojun Hagino #else 2379686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(nd_rd, struct nd_redirect *, m, off, icmp6len); 2380686cdd19SJun-ichiro itojun Hagino if (nd_rd == NULL) { 2381e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 238282cd038dSYoshinobu Inoue return; 2383686cdd19SJun-ichiro itojun Hagino } 2384686cdd19SJun-ichiro itojun Hagino #endif 2385686cdd19SJun-ichiro itojun Hagino redtgt6 = nd_rd->nd_rd_target; 2386686cdd19SJun-ichiro itojun Hagino reddst6 = nd_rd->nd_rd_dst; 238782cd038dSYoshinobu Inoue 2388a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&redtgt6, m->m_pkthdr.rcvif, NULL) || 2389a1f7e5f8SHajimu UMEMOTO in6_setscope(&reddst6, m->m_pkthdr.rcvif, NULL)) { 2390a1f7e5f8SHajimu UMEMOTO goto freeit; 2391a1f7e5f8SHajimu UMEMOTO } 239282cd038dSYoshinobu Inoue 239382cd038dSYoshinobu Inoue /* validation */ 239482cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_LINKLOCAL(&src6)) { 239533841545SHajimu UMEMOTO nd6log((LOG_ERR, 239682cd038dSYoshinobu Inoue "ICMP6 redirect sent from %s rejected; " 239706cd0a3fSHajimu UMEMOTO "must be from linklocal\n", 23981d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &src6))); 239933841545SHajimu UMEMOTO goto bad; 240082cd038dSYoshinobu Inoue } 240182cd038dSYoshinobu Inoue if (ip6->ip6_hlim != 255) { 240233841545SHajimu UMEMOTO nd6log((LOG_ERR, 240382cd038dSYoshinobu Inoue "ICMP6 redirect sent from %s rejected; " 240482cd038dSYoshinobu Inoue "hlim=%d (must be 255)\n", 24051d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &src6), ip6->ip6_hlim)); 240633841545SHajimu UMEMOTO goto bad; 240782cd038dSYoshinobu Inoue } 240882cd038dSYoshinobu Inoue { 240982cd038dSYoshinobu Inoue /* ip6->ip6_src must be equal to gw for icmp6->icmp6_reddst */ 241082cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 241182cd038dSYoshinobu Inoue struct in6_addr *gw6; 241282cd038dSYoshinobu Inoue 241382cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 241482cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 241582cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 241682cd038dSYoshinobu Inoue bcopy(&reddst6, &sin6.sin6_addr, sizeof(reddst6)); 241782cd038dSYoshinobu Inoue rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL); 241882cd038dSYoshinobu Inoue if (rt) { 2419deebc913SHajimu UMEMOTO if (rt->rt_gateway == NULL || 2420deebc913SHajimu UMEMOTO rt->rt_gateway->sa_family != AF_INET6) { 242133841545SHajimu UMEMOTO nd6log((LOG_ERR, 2422deebc913SHajimu UMEMOTO "ICMP6 redirect rejected; no route " 2423deebc913SHajimu UMEMOTO "with inet6 gateway found for redirect dst: %s\n", 242433841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 2425d1dd20beSSam Leffler RTFREE_LOCKED(rt); 242633841545SHajimu UMEMOTO goto bad; 2427deebc913SHajimu UMEMOTO } 2428deebc913SHajimu UMEMOTO 242982cd038dSYoshinobu Inoue gw6 = &(((struct sockaddr_in6 *)rt->rt_gateway)->sin6_addr); 243082cd038dSYoshinobu Inoue if (bcmp(&src6, gw6, sizeof(struct in6_addr)) != 0) { 243133841545SHajimu UMEMOTO nd6log((LOG_ERR, 243282cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 243382cd038dSYoshinobu Inoue "not equal to gw-for-src=%s (must be same): " 243482cd038dSYoshinobu Inoue "%s\n", 24351d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, gw6), 243633841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 2437d1dd20beSSam Leffler RTFREE_LOCKED(rt); 243833841545SHajimu UMEMOTO goto bad; 243982cd038dSYoshinobu Inoue } 244082cd038dSYoshinobu Inoue } else { 244133841545SHajimu UMEMOTO nd6log((LOG_ERR, 244282cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 244382cd038dSYoshinobu Inoue "no route found for redirect dst: %s\n", 244433841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 244533841545SHajimu UMEMOTO goto bad; 244682cd038dSYoshinobu Inoue } 2447d1dd20beSSam Leffler RTFREE_LOCKED(rt); 244882cd038dSYoshinobu Inoue rt = NULL; 244982cd038dSYoshinobu Inoue } 245082cd038dSYoshinobu Inoue if (IN6_IS_ADDR_MULTICAST(&reddst6)) { 245133841545SHajimu UMEMOTO nd6log((LOG_ERR, 245282cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 245382cd038dSYoshinobu Inoue "redirect dst must be unicast: %s\n", 245433841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 245533841545SHajimu UMEMOTO goto bad; 245682cd038dSYoshinobu Inoue } 245782cd038dSYoshinobu Inoue 245882cd038dSYoshinobu Inoue is_router = is_onlink = 0; 245982cd038dSYoshinobu Inoue if (IN6_IS_ADDR_LINKLOCAL(&redtgt6)) 246082cd038dSYoshinobu Inoue is_router = 1; /* router case */ 246182cd038dSYoshinobu Inoue if (bcmp(&redtgt6, &reddst6, sizeof(redtgt6)) == 0) 246282cd038dSYoshinobu Inoue is_onlink = 1; /* on-link destination case */ 246382cd038dSYoshinobu Inoue if (!is_router && !is_onlink) { 246433841545SHajimu UMEMOTO nd6log((LOG_ERR, 246582cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 246682cd038dSYoshinobu Inoue "neither router case nor onlink case: %s\n", 246733841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 246833841545SHajimu UMEMOTO goto bad; 246982cd038dSYoshinobu Inoue } 247082cd038dSYoshinobu Inoue /* validation passed */ 247182cd038dSYoshinobu Inoue 247282cd038dSYoshinobu Inoue icmp6len -= sizeof(*nd_rd); 247382cd038dSYoshinobu Inoue nd6_option_init(nd_rd + 1, icmp6len, &ndopts); 247482cd038dSYoshinobu Inoue if (nd6_options(&ndopts) < 0) { 247537c1ff48SGleb Smirnoff nd6log((LOG_INFO, "%s: invalid ND option, rejected: %s\n", 247637c1ff48SGleb Smirnoff __func__, icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 247733841545SHajimu UMEMOTO /* nd6_options have incremented stats */ 2478686cdd19SJun-ichiro itojun Hagino goto freeit; 247982cd038dSYoshinobu Inoue } 248082cd038dSYoshinobu Inoue 248182cd038dSYoshinobu Inoue if (ndopts.nd_opts_tgt_lladdr) { 248282cd038dSYoshinobu Inoue lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1); 248382cd038dSYoshinobu Inoue lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3; 248482cd038dSYoshinobu Inoue } 248582cd038dSYoshinobu Inoue 248682cd038dSYoshinobu Inoue if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) { 248737c1ff48SGleb Smirnoff nd6log((LOG_INFO, "%s: lladdrlen mismatch for %s " 248882cd038dSYoshinobu Inoue "(if %d, icmp6 packet %d): %s\n", 248937c1ff48SGleb Smirnoff __func__, ip6_sprintf(ip6buf, &redtgt6), 24901d54aa3bSBjoern A. Zeeb ifp->if_addrlen, lladdrlen - 2, 249133841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 249233841545SHajimu UMEMOTO goto bad; 249382cd038dSYoshinobu Inoue } 249482cd038dSYoshinobu Inoue 249582cd038dSYoshinobu Inoue /* RFC 2461 8.3 */ 249682cd038dSYoshinobu Inoue nd6_cache_lladdr(ifp, &redtgt6, lladdr, lladdrlen, ND_REDIRECT, 249782cd038dSYoshinobu Inoue is_onlink ? ND_REDIRECT_ONLINK : ND_REDIRECT_ROUTER); 249882cd038dSYoshinobu Inoue 249982cd038dSYoshinobu Inoue if (!is_onlink) { /* better router case. perform rtredirect. */ 250082cd038dSYoshinobu Inoue /* perform rtredirect */ 250182cd038dSYoshinobu Inoue struct sockaddr_in6 sdst; 250282cd038dSYoshinobu Inoue struct sockaddr_in6 sgw; 250382cd038dSYoshinobu Inoue struct sockaddr_in6 ssrc; 250482cd038dSYoshinobu Inoue 250582cd038dSYoshinobu Inoue bzero(&sdst, sizeof(sdst)); 250682cd038dSYoshinobu Inoue bzero(&sgw, sizeof(sgw)); 250782cd038dSYoshinobu Inoue bzero(&ssrc, sizeof(ssrc)); 250882cd038dSYoshinobu Inoue sdst.sin6_family = sgw.sin6_family = ssrc.sin6_family = AF_INET6; 250982cd038dSYoshinobu Inoue sdst.sin6_len = sgw.sin6_len = ssrc.sin6_len = 251082cd038dSYoshinobu Inoue sizeof(struct sockaddr_in6); 251182cd038dSYoshinobu Inoue bcopy(&redtgt6, &sgw.sin6_addr, sizeof(struct in6_addr)); 251282cd038dSYoshinobu Inoue bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr)); 251382cd038dSYoshinobu Inoue bcopy(&src6, &ssrc.sin6_addr, sizeof(struct in6_addr)); 251482cd038dSYoshinobu Inoue rtredirect((struct sockaddr *)&sdst, (struct sockaddr *)&sgw, 251582cd038dSYoshinobu Inoue (struct sockaddr *)NULL, RTF_GATEWAY | RTF_HOST, 2516d1dd20beSSam Leffler (struct sockaddr *)&ssrc); 251782cd038dSYoshinobu Inoue } 251882cd038dSYoshinobu Inoue /* finally update cached route in each socket via pfctlinput */ 251982cd038dSYoshinobu Inoue { 252082cd038dSYoshinobu Inoue struct sockaddr_in6 sdst; 252182cd038dSYoshinobu Inoue 252282cd038dSYoshinobu Inoue bzero(&sdst, sizeof(sdst)); 252382cd038dSYoshinobu Inoue sdst.sin6_family = AF_INET6; 252482cd038dSYoshinobu Inoue sdst.sin6_len = sizeof(struct sockaddr_in6); 252582cd038dSYoshinobu Inoue bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr)); 252682cd038dSYoshinobu Inoue pfctlinput(PRC_REDIRECT_HOST, (struct sockaddr *)&sdst); 2527b2630c29SGeorge V. Neville-Neil #ifdef IPSEC 252882cd038dSYoshinobu Inoue key_sa_routechange((struct sockaddr *)&sdst); 2529b2630c29SGeorge V. Neville-Neil #endif /* IPSEC */ 253082cd038dSYoshinobu Inoue } 2531686cdd19SJun-ichiro itojun Hagino 2532686cdd19SJun-ichiro itojun Hagino freeit: 2533686cdd19SJun-ichiro itojun Hagino m_freem(m); 253433841545SHajimu UMEMOTO return; 253533841545SHajimu UMEMOTO 253633841545SHajimu UMEMOTO bad: 2537e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badredirect); 253833841545SHajimu UMEMOTO m_freem(m); 253982cd038dSYoshinobu Inoue } 254082cd038dSYoshinobu Inoue 254182cd038dSYoshinobu Inoue void 25421272577eSXin LI icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt) 254382cd038dSYoshinobu Inoue { 254482cd038dSYoshinobu Inoue struct ifnet *ifp; /* my outgoing interface */ 254582cd038dSYoshinobu Inoue struct in6_addr *ifp_ll6; 254682cd038dSYoshinobu Inoue struct in6_addr *router_ll6; 254782cd038dSYoshinobu Inoue struct ip6_hdr *sip6; /* m0 as struct ip6_hdr */ 254882cd038dSYoshinobu Inoue struct mbuf *m = NULL; /* newly allocated one */ 25491db8d1f8SAna Kukec struct m_tag *mtag; 255082cd038dSYoshinobu Inoue struct ip6_hdr *ip6; /* m as struct ip6_hdr */ 255182cd038dSYoshinobu Inoue struct nd_redirect *nd_rd; 255256c423b0SKip Macy struct llentry *ln = NULL; 255382cd038dSYoshinobu Inoue size_t maxlen; 255482cd038dSYoshinobu Inoue u_char *p; 255582cd038dSYoshinobu Inoue struct ifnet *outif = NULL; 2556686cdd19SJun-ichiro itojun Hagino struct sockaddr_in6 src_sa; 2557686cdd19SJun-ichiro itojun Hagino 2558603724d3SBjoern A. Zeeb icmp6_errcount(&V_icmp6stat.icp6s_outerrhist, ND_REDIRECT, 0); 255982cd038dSYoshinobu Inoue 256082cd038dSYoshinobu Inoue /* if we are not router, we don't send icmp6 redirect */ 2561603724d3SBjoern A. Zeeb if (!V_ip6_forwarding) 256282cd038dSYoshinobu Inoue goto fail; 256382cd038dSYoshinobu Inoue 256482cd038dSYoshinobu Inoue /* sanity check */ 256582cd038dSYoshinobu Inoue if (!m0 || !rt || !(rt->rt_flags & RTF_UP) || !(ifp = rt->rt_ifp)) 256682cd038dSYoshinobu Inoue goto fail; 256782cd038dSYoshinobu Inoue 256882cd038dSYoshinobu Inoue /* 256982cd038dSYoshinobu Inoue * Address check: 257082cd038dSYoshinobu Inoue * the source address must identify a neighbor, and 257182cd038dSYoshinobu Inoue * the destination address must not be a multicast address 257282cd038dSYoshinobu Inoue * [RFC 2461, sec 8.2] 257382cd038dSYoshinobu Inoue */ 257482cd038dSYoshinobu Inoue sip6 = mtod(m0, struct ip6_hdr *); 2575686cdd19SJun-ichiro itojun Hagino bzero(&src_sa, sizeof(src_sa)); 2576686cdd19SJun-ichiro itojun Hagino src_sa.sin6_family = AF_INET6; 2577686cdd19SJun-ichiro itojun Hagino src_sa.sin6_len = sizeof(src_sa); 2578686cdd19SJun-ichiro itojun Hagino src_sa.sin6_addr = sip6->ip6_src; 2579686cdd19SJun-ichiro itojun Hagino if (nd6_is_addr_neighbor(&src_sa, ifp) == 0) 258082cd038dSYoshinobu Inoue goto fail; 258182cd038dSYoshinobu Inoue if (IN6_IS_ADDR_MULTICAST(&sip6->ip6_dst)) 258282cd038dSYoshinobu Inoue goto fail; /* what should we do here? */ 258382cd038dSYoshinobu Inoue 258482cd038dSYoshinobu Inoue /* rate limit */ 258582cd038dSYoshinobu Inoue if (icmp6_ratelimit(&sip6->ip6_src, ND_REDIRECT, 0)) 258682cd038dSYoshinobu Inoue goto fail; 258782cd038dSYoshinobu Inoue 258882cd038dSYoshinobu Inoue /* 258982cd038dSYoshinobu Inoue * Since we are going to append up to 1280 bytes (= IPV6_MMTU), 259082cd038dSYoshinobu Inoue * we almost always ask for an mbuf cluster for simplicity. 259182cd038dSYoshinobu Inoue * (MHLEN < IPV6_MMTU is almost always true) 259282cd038dSYoshinobu Inoue */ 2593686cdd19SJun-ichiro itojun Hagino #if IPV6_MMTU >= MCLBYTES 2594686cdd19SJun-ichiro itojun Hagino # error assumption failed about IPV6_MMTU and MCLBYTES 2595686cdd19SJun-ichiro itojun Hagino #endif 2596a163d034SWarner Losh MGETHDR(m, M_DONTWAIT, MT_HEADER); 2597686cdd19SJun-ichiro itojun Hagino if (m && IPV6_MMTU >= MHLEN) 2598a163d034SWarner Losh MCLGET(m, M_DONTWAIT); 259982cd038dSYoshinobu Inoue if (!m) 260082cd038dSYoshinobu Inoue goto fail; 260133841545SHajimu UMEMOTO m->m_pkthdr.rcvif = NULL; 260233841545SHajimu UMEMOTO m->m_len = 0; 260333841545SHajimu UMEMOTO maxlen = M_TRAILINGSPACE(m); 260482cd038dSYoshinobu Inoue maxlen = min(IPV6_MMTU, maxlen); 260582cd038dSYoshinobu Inoue /* just for safety */ 2606686cdd19SJun-ichiro itojun Hagino if (maxlen < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) + 2607686cdd19SJun-ichiro itojun Hagino ((sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7)) { 260882cd038dSYoshinobu Inoue goto fail; 2609686cdd19SJun-ichiro itojun Hagino } 261082cd038dSYoshinobu Inoue 261182cd038dSYoshinobu Inoue { 261282cd038dSYoshinobu Inoue /* get ip6 linklocal address for ifp(my outgoing interface). */ 2613686cdd19SJun-ichiro itojun Hagino struct in6_ifaddr *ia; 2614686cdd19SJun-ichiro itojun Hagino if ((ia = in6ifa_ifpforlinklocal(ifp, 2615686cdd19SJun-ichiro itojun Hagino IN6_IFF_NOTREADY| 2616686cdd19SJun-ichiro itojun Hagino IN6_IFF_ANYCAST)) == NULL) 261782cd038dSYoshinobu Inoue goto fail; 261882cd038dSYoshinobu Inoue ifp_ll6 = &ia->ia_addr.sin6_addr; 26198c0fec80SRobert Watson /* XXXRW: reference released prematurely. */ 26208c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 262182cd038dSYoshinobu Inoue } 262282cd038dSYoshinobu Inoue 262382cd038dSYoshinobu Inoue /* get ip6 linklocal address for the router. */ 262482cd038dSYoshinobu Inoue if (rt->rt_gateway && (rt->rt_flags & RTF_GATEWAY)) { 262582cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 262682cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)rt->rt_gateway; 262782cd038dSYoshinobu Inoue router_ll6 = &sin6->sin6_addr; 262882cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_LINKLOCAL(router_ll6)) 262982cd038dSYoshinobu Inoue router_ll6 = (struct in6_addr *)NULL; 263082cd038dSYoshinobu Inoue } else 263182cd038dSYoshinobu Inoue router_ll6 = (struct in6_addr *)NULL; 263282cd038dSYoshinobu Inoue 263382cd038dSYoshinobu Inoue /* ip6 */ 263482cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 263582cd038dSYoshinobu Inoue ip6->ip6_flow = 0; 2636686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 2637686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc |= IPV6_VERSION; 263882cd038dSYoshinobu Inoue /* ip6->ip6_plen will be set later */ 263982cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 264082cd038dSYoshinobu Inoue ip6->ip6_hlim = 255; 264182cd038dSYoshinobu Inoue /* ip6->ip6_src must be linklocal addr for my outgoing if. */ 264282cd038dSYoshinobu Inoue bcopy(ifp_ll6, &ip6->ip6_src, sizeof(struct in6_addr)); 264382cd038dSYoshinobu Inoue bcopy(&sip6->ip6_src, &ip6->ip6_dst, sizeof(struct in6_addr)); 264482cd038dSYoshinobu Inoue 264582cd038dSYoshinobu Inoue /* ND Redirect */ 264682cd038dSYoshinobu Inoue nd_rd = (struct nd_redirect *)(ip6 + 1); 264782cd038dSYoshinobu Inoue nd_rd->nd_rd_type = ND_REDIRECT; 264882cd038dSYoshinobu Inoue nd_rd->nd_rd_code = 0; 264982cd038dSYoshinobu Inoue nd_rd->nd_rd_reserved = 0; 265082cd038dSYoshinobu Inoue if (rt->rt_flags & RTF_GATEWAY) { 265182cd038dSYoshinobu Inoue /* 265282cd038dSYoshinobu Inoue * nd_rd->nd_rd_target must be a link-local address in 265382cd038dSYoshinobu Inoue * better router cases. 265482cd038dSYoshinobu Inoue */ 265582cd038dSYoshinobu Inoue if (!router_ll6) 265682cd038dSYoshinobu Inoue goto fail; 265782cd038dSYoshinobu Inoue bcopy(router_ll6, &nd_rd->nd_rd_target, 265882cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_target)); 265982cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst, 266082cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_dst)); 266182cd038dSYoshinobu Inoue } else { 266282cd038dSYoshinobu Inoue /* make sure redtgt == reddst */ 266382cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_target, 266482cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_target)); 266582cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst, 266682cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_dst)); 266782cd038dSYoshinobu Inoue } 266882cd038dSYoshinobu Inoue 266982cd038dSYoshinobu Inoue p = (u_char *)(nd_rd + 1); 267082cd038dSYoshinobu Inoue 267182cd038dSYoshinobu Inoue if (!router_ll6) 267282cd038dSYoshinobu Inoue goto nolladdropt; 267382cd038dSYoshinobu Inoue 267482cd038dSYoshinobu Inoue { 267582cd038dSYoshinobu Inoue /* target lladdr option */ 267682cd038dSYoshinobu Inoue int len; 267782cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 267882cd038dSYoshinobu Inoue char *lladdr; 267982cd038dSYoshinobu Inoue 26806e6b3f7cSQing Li IF_AFDATA_LOCK(ifp); 26816e6b3f7cSQing Li ln = nd6_lookup(router_ll6, 0, ifp); 26826e6b3f7cSQing Li IF_AFDATA_UNLOCK(ifp); 268356c423b0SKip Macy if (ln == NULL) 268482cd038dSYoshinobu Inoue goto nolladdropt; 26856e6b3f7cSQing Li 2686686cdd19SJun-ichiro itojun Hagino len = sizeof(*nd_opt) + ifp->if_addrlen; 2687686cdd19SJun-ichiro itojun Hagino len = (len + 7) & ~7; /* round by 8 */ 2688686cdd19SJun-ichiro itojun Hagino /* safety check */ 2689686cdd19SJun-ichiro itojun Hagino if (len + (p - (u_char *)ip6) > maxlen) 2690686cdd19SJun-ichiro itojun Hagino goto nolladdropt; 26916e6b3f7cSQing Li 26926e6b3f7cSQing Li if (ln->la_flags & LLE_VALID) { 269382cd038dSYoshinobu Inoue nd_opt = (struct nd_opt_hdr *)p; 269482cd038dSYoshinobu Inoue nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; 269582cd038dSYoshinobu Inoue nd_opt->nd_opt_len = len >> 3; 269682cd038dSYoshinobu Inoue lladdr = (char *)(nd_opt + 1); 26976e6b3f7cSQing Li bcopy(&ln->ll_addr, lladdr, ifp->if_addrlen); 2698686cdd19SJun-ichiro itojun Hagino p += len; 269982cd038dSYoshinobu Inoue } 270082cd038dSYoshinobu Inoue } 270156c423b0SKip Macy nolladdropt: 270256c423b0SKip Macy if (ln != NULL) 270356c423b0SKip Macy LLE_RUNLOCK(ln); 270482cd038dSYoshinobu Inoue 270582cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len = p - (u_char *)ip6; 270682cd038dSYoshinobu Inoue 270782cd038dSYoshinobu Inoue /* just to be safe */ 2708686cdd19SJun-ichiro itojun Hagino #ifdef M_DECRYPTED /*not openbsd*/ 270982cd038dSYoshinobu Inoue if (m0->m_flags & M_DECRYPTED) 271082cd038dSYoshinobu Inoue goto noredhdropt; 2711686cdd19SJun-ichiro itojun Hagino #endif 2712686cdd19SJun-ichiro itojun Hagino if (p - (u_char *)ip6 > maxlen) 2713686cdd19SJun-ichiro itojun Hagino goto noredhdropt; 271482cd038dSYoshinobu Inoue 271582cd038dSYoshinobu Inoue { 271682cd038dSYoshinobu Inoue /* redirected header option */ 271782cd038dSYoshinobu Inoue int len; 271882cd038dSYoshinobu Inoue struct nd_opt_rd_hdr *nd_opt_rh; 271982cd038dSYoshinobu Inoue 272082cd038dSYoshinobu Inoue /* 272182cd038dSYoshinobu Inoue * compute the maximum size for icmp6 redirect header option. 272282cd038dSYoshinobu Inoue * XXX room for auth header? 272382cd038dSYoshinobu Inoue */ 272482cd038dSYoshinobu Inoue len = maxlen - (p - (u_char *)ip6); 272582cd038dSYoshinobu Inoue len &= ~7; 272682cd038dSYoshinobu Inoue 272782cd038dSYoshinobu Inoue /* This is just for simplicity. */ 272882cd038dSYoshinobu Inoue if (m0->m_pkthdr.len != m0->m_len) { 272982cd038dSYoshinobu Inoue if (m0->m_next) { 273082cd038dSYoshinobu Inoue m_freem(m0->m_next); 273182cd038dSYoshinobu Inoue m0->m_next = NULL; 273282cd038dSYoshinobu Inoue } 273382cd038dSYoshinobu Inoue m0->m_pkthdr.len = m0->m_len; 273482cd038dSYoshinobu Inoue } 273582cd038dSYoshinobu Inoue 273682cd038dSYoshinobu Inoue /* 273782cd038dSYoshinobu Inoue * Redirected header option spec (RFC2461 4.6.3) talks nothing 273882cd038dSYoshinobu Inoue * about padding/truncate rule for the original IP packet. 273906cd0a3fSHajimu UMEMOTO * From the discussion on IPv6imp in Feb 1999, 274006cd0a3fSHajimu UMEMOTO * the consensus was: 274182cd038dSYoshinobu Inoue * - "attach as much as possible" is the goal 274206cd0a3fSHajimu UMEMOTO * - pad if not aligned (original size can be guessed by 274306cd0a3fSHajimu UMEMOTO * original ip6 header) 274482cd038dSYoshinobu Inoue * Following code adds the padding if it is simple enough, 274582cd038dSYoshinobu Inoue * and truncates if not. 274682cd038dSYoshinobu Inoue */ 274782cd038dSYoshinobu Inoue if (m0->m_next || m0->m_pkthdr.len != m0->m_len) 274806cd0a3fSHajimu UMEMOTO panic("assumption failed in %s:%d", __FILE__, 274906cd0a3fSHajimu UMEMOTO __LINE__); 275082cd038dSYoshinobu Inoue 275182cd038dSYoshinobu Inoue if (len - sizeof(*nd_opt_rh) < m0->m_pkthdr.len) { 275282cd038dSYoshinobu Inoue /* not enough room, truncate */ 275306cd0a3fSHajimu UMEMOTO m0->m_pkthdr.len = m0->m_len = len - 275406cd0a3fSHajimu UMEMOTO sizeof(*nd_opt_rh); 275582cd038dSYoshinobu Inoue } else { 275682cd038dSYoshinobu Inoue /* enough room, pad or truncate */ 275782cd038dSYoshinobu Inoue size_t extra; 275882cd038dSYoshinobu Inoue 275982cd038dSYoshinobu Inoue extra = m0->m_pkthdr.len % 8; 276082cd038dSYoshinobu Inoue if (extra) { 276182cd038dSYoshinobu Inoue /* pad if easy enough, truncate if not */ 276282cd038dSYoshinobu Inoue if (8 - extra <= M_TRAILINGSPACE(m0)) { 276382cd038dSYoshinobu Inoue /* pad */ 276482cd038dSYoshinobu Inoue m0->m_len += (8 - extra); 276582cd038dSYoshinobu Inoue m0->m_pkthdr.len += (8 - extra); 276682cd038dSYoshinobu Inoue } else { 276782cd038dSYoshinobu Inoue /* truncate */ 276882cd038dSYoshinobu Inoue m0->m_pkthdr.len -= extra; 276982cd038dSYoshinobu Inoue m0->m_len -= extra; 277082cd038dSYoshinobu Inoue } 277182cd038dSYoshinobu Inoue } 277282cd038dSYoshinobu Inoue len = m0->m_pkthdr.len + sizeof(*nd_opt_rh); 277306cd0a3fSHajimu UMEMOTO m0->m_pkthdr.len = m0->m_len = len - 277406cd0a3fSHajimu UMEMOTO sizeof(*nd_opt_rh); 277582cd038dSYoshinobu Inoue } 277682cd038dSYoshinobu Inoue 277782cd038dSYoshinobu Inoue nd_opt_rh = (struct nd_opt_rd_hdr *)p; 277882cd038dSYoshinobu Inoue bzero(nd_opt_rh, sizeof(*nd_opt_rh)); 277982cd038dSYoshinobu Inoue nd_opt_rh->nd_opt_rh_type = ND_OPT_REDIRECTED_HEADER; 278082cd038dSYoshinobu Inoue nd_opt_rh->nd_opt_rh_len = len >> 3; 278182cd038dSYoshinobu Inoue p += sizeof(*nd_opt_rh); 278282cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len = p - (u_char *)ip6; 278382cd038dSYoshinobu Inoue 278482cd038dSYoshinobu Inoue /* connect m0 to m */ 2785db06e8a0SSUZUKI Shinsuke m_tag_delete_chain(m0, NULL); 2786db06e8a0SSUZUKI Shinsuke m0->m_flags &= ~M_PKTHDR; 278782cd038dSYoshinobu Inoue m->m_next = m0; 278882cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len + m0->m_len; 2789db06e8a0SSUZUKI Shinsuke m0 = NULL; 279082cd038dSYoshinobu Inoue } 279182cd038dSYoshinobu Inoue noredhdropt:; 2792db06e8a0SSUZUKI Shinsuke if (m0) { 2793db06e8a0SSUZUKI Shinsuke m_freem(m0); 2794db06e8a0SSUZUKI Shinsuke m0 = NULL; 2795db06e8a0SSUZUKI Shinsuke } 279682cd038dSYoshinobu Inoue 27979a4f9608SHajimu UMEMOTO /* XXX: clear embedded link IDs in the inner header */ 27989a4f9608SHajimu UMEMOTO in6_clearscope(&sip6->ip6_src); 27999a4f9608SHajimu UMEMOTO in6_clearscope(&sip6->ip6_dst); 28009a4f9608SHajimu UMEMOTO in6_clearscope(&nd_rd->nd_rd_target); 28019a4f9608SHajimu UMEMOTO in6_clearscope(&nd_rd->nd_rd_dst); 280282cd038dSYoshinobu Inoue 280382cd038dSYoshinobu Inoue ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 280482cd038dSYoshinobu Inoue 280582cd038dSYoshinobu Inoue nd_rd->nd_rd_cksum = 0; 280606cd0a3fSHajimu UMEMOTO nd_rd->nd_rd_cksum = in6_cksum(m, IPPROTO_ICMPV6, 280706cd0a3fSHajimu UMEMOTO sizeof(*ip6), ntohs(ip6->ip6_plen)); 280882cd038dSYoshinobu Inoue 28091db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 28101db8d1f8SAna Kukec mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, sizeof(unsigned short), 28111db8d1f8SAna Kukec M_NOWAIT); 28121db8d1f8SAna Kukec if (mtag == NULL) 28131db8d1f8SAna Kukec goto fail; 28141db8d1f8SAna Kukec *(unsigned short *)(mtag + 1) = nd_rd->nd_rd_type; 28151db8d1f8SAna Kukec m_tag_prepend(m, mtag); 28161db8d1f8SAna Kukec } 28171db8d1f8SAna Kukec 281882cd038dSYoshinobu Inoue /* send the packet to outside... */ 28195d846453SSam Leffler ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL); 282082cd038dSYoshinobu Inoue if (outif) { 282182cd038dSYoshinobu Inoue icmp6_ifstat_inc(outif, ifs6_out_msg); 282282cd038dSYoshinobu Inoue icmp6_ifstat_inc(outif, ifs6_out_redirect); 282382cd038dSYoshinobu Inoue } 2824e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ND_REDIRECT]); 282582cd038dSYoshinobu Inoue 282682cd038dSYoshinobu Inoue return; 282782cd038dSYoshinobu Inoue 282882cd038dSYoshinobu Inoue fail: 282982cd038dSYoshinobu Inoue if (m) 283082cd038dSYoshinobu Inoue m_freem(m); 283182cd038dSYoshinobu Inoue if (m0) 283282cd038dSYoshinobu Inoue m_freem(m0); 283382cd038dSYoshinobu Inoue } 283482cd038dSYoshinobu Inoue 283582cd038dSYoshinobu Inoue /* 283682cd038dSYoshinobu Inoue * ICMPv6 socket option processing. 283782cd038dSYoshinobu Inoue */ 283882cd038dSYoshinobu Inoue int 28391272577eSXin LI icmp6_ctloutput(struct socket *so, struct sockopt *sopt) 284082cd038dSYoshinobu Inoue { 284182cd038dSYoshinobu Inoue int error = 0; 284282cd038dSYoshinobu Inoue int optlen; 284333841545SHajimu UMEMOTO struct inpcb *inp = sotoinpcb(so); 284482cd038dSYoshinobu Inoue int level, op, optname; 284582cd038dSYoshinobu Inoue 284682cd038dSYoshinobu Inoue if (sopt) { 284782cd038dSYoshinobu Inoue level = sopt->sopt_level; 284882cd038dSYoshinobu Inoue op = sopt->sopt_dir; 284982cd038dSYoshinobu Inoue optname = sopt->sopt_name; 285082cd038dSYoshinobu Inoue optlen = sopt->sopt_valsize; 285182cd038dSYoshinobu Inoue } else 285282cd038dSYoshinobu Inoue level = op = optname = optlen = 0; 285333841545SHajimu UMEMOTO 285482cd038dSYoshinobu Inoue if (level != IPPROTO_ICMPV6) { 285582cd038dSYoshinobu Inoue return EINVAL; 285682cd038dSYoshinobu Inoue } 285782cd038dSYoshinobu Inoue 285882cd038dSYoshinobu Inoue switch (op) { 285982cd038dSYoshinobu Inoue case PRCO_SETOPT: 286082cd038dSYoshinobu Inoue switch (optname) { 286182cd038dSYoshinobu Inoue case ICMP6_FILTER: 286282cd038dSYoshinobu Inoue { 2863ae89d5a3SRobert Watson struct icmp6_filter ic6f; 286482cd038dSYoshinobu Inoue 2865ae89d5a3SRobert Watson if (optlen != sizeof(ic6f)) { 286682cd038dSYoshinobu Inoue error = EMSGSIZE; 286782cd038dSYoshinobu Inoue break; 286882cd038dSYoshinobu Inoue } 2869ae89d5a3SRobert Watson error = sooptcopyin(sopt, &ic6f, optlen, optlen); 2870ae89d5a3SRobert Watson if (error == 0) { 2871ae89d5a3SRobert Watson INP_WLOCK(inp); 2872ae89d5a3SRobert Watson *inp->in6p_icmp6filt = ic6f; 2873ae89d5a3SRobert Watson INP_WUNLOCK(inp); 2874ae89d5a3SRobert Watson } 287582cd038dSYoshinobu Inoue break; 287682cd038dSYoshinobu Inoue } 287782cd038dSYoshinobu Inoue 287882cd038dSYoshinobu Inoue default: 287982cd038dSYoshinobu Inoue error = ENOPROTOOPT; 288082cd038dSYoshinobu Inoue break; 288182cd038dSYoshinobu Inoue } 288282cd038dSYoshinobu Inoue break; 288382cd038dSYoshinobu Inoue 288482cd038dSYoshinobu Inoue case PRCO_GETOPT: 288582cd038dSYoshinobu Inoue switch (optname) { 288682cd038dSYoshinobu Inoue case ICMP6_FILTER: 288782cd038dSYoshinobu Inoue { 2888ae89d5a3SRobert Watson struct icmp6_filter ic6f; 2889ae89d5a3SRobert Watson 2890ae89d5a3SRobert Watson INP_RLOCK(inp); 2891ae89d5a3SRobert Watson ic6f = *inp->in6p_icmp6filt; 2892ae89d5a3SRobert Watson INP_RUNLOCK(inp); 2893ae89d5a3SRobert Watson error = sooptcopyout(sopt, &ic6f, sizeof(ic6f)); 289482cd038dSYoshinobu Inoue break; 289582cd038dSYoshinobu Inoue } 289682cd038dSYoshinobu Inoue 289782cd038dSYoshinobu Inoue default: 289882cd038dSYoshinobu Inoue error = ENOPROTOOPT; 289982cd038dSYoshinobu Inoue break; 290082cd038dSYoshinobu Inoue } 290182cd038dSYoshinobu Inoue break; 290282cd038dSYoshinobu Inoue } 290382cd038dSYoshinobu Inoue 290482cd038dSYoshinobu Inoue return (error); 290582cd038dSYoshinobu Inoue } 290682cd038dSYoshinobu Inoue 290782cd038dSYoshinobu Inoue /* 290882cd038dSYoshinobu Inoue * Perform rate limit check. 290982cd038dSYoshinobu Inoue * Returns 0 if it is okay to send the icmp6 packet. 291082cd038dSYoshinobu Inoue * Returns 1 if the router SHOULD NOT send this icmp6 packet due to rate 291182cd038dSYoshinobu Inoue * limitation. 291282cd038dSYoshinobu Inoue * 291382cd038dSYoshinobu Inoue * XXX per-destination/type check necessary? 29141272577eSXin LI * 29151272577eSXin LI * dst - not used at this moment 29161272577eSXin LI * type - not used at this moment 29171272577eSXin LI * code - not used at this moment 291882cd038dSYoshinobu Inoue */ 291982cd038dSYoshinobu Inoue static int 29201272577eSXin LI icmp6_ratelimit(const struct in6_addr *dst, const int type, 29211272577eSXin LI const int code) 292282cd038dSYoshinobu Inoue { 2923686cdd19SJun-ichiro itojun Hagino int ret; 292482cd038dSYoshinobu Inoue 2925686cdd19SJun-ichiro itojun Hagino ret = 0; /* okay to send */ 292682cd038dSYoshinobu Inoue 2927686cdd19SJun-ichiro itojun Hagino /* PPS limit */ 2928603724d3SBjoern A. Zeeb if (!ppsratecheck(&V_icmp6errppslim_last, &V_icmp6errpps_count, 2929603724d3SBjoern A. Zeeb V_icmp6errppslim)) { 293082cd038dSYoshinobu Inoue /* The packet is subject to rate limit */ 2931686cdd19SJun-ichiro itojun Hagino ret++; 293282cd038dSYoshinobu Inoue } 293382cd038dSYoshinobu Inoue 2934686cdd19SJun-ichiro itojun Hagino return ret; 293582cd038dSYoshinobu Inoue } 2936