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 66f0cace5dSRobert Watson #define MBUF_PRIVATE /* XXXRW: Optimisation tries to avoid M_EXT mbufs */ 67f0cace5dSRobert Watson 68686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 69686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 7082cd038dSYoshinobu Inoue 7182cd038dSYoshinobu Inoue #include <sys/param.h> 72960ed29cSSeigo Tanimura #include <sys/domain.h> 7376ca6f88SJamie Gritton #include <sys/jail.h> 74960ed29cSSeigo Tanimura #include <sys/kernel.h> 75960ed29cSSeigo Tanimura #include <sys/lock.h> 7633841545SHajimu UMEMOTO #include <sys/malloc.h> 7782cd038dSYoshinobu Inoue #include <sys/mbuf.h> 78530c0060SRobert Watson #include <sys/proc.h> 7982cd038dSYoshinobu Inoue #include <sys/protosw.h> 80960ed29cSSeigo Tanimura #include <sys/signalvar.h> 8182cd038dSYoshinobu Inoue #include <sys/socket.h> 8282cd038dSYoshinobu Inoue #include <sys/socketvar.h> 83960ed29cSSeigo Tanimura #include <sys/sx.h> 8482cd038dSYoshinobu Inoue #include <sys/syslog.h> 85960ed29cSSeigo Tanimura #include <sys/systm.h> 86960ed29cSSeigo Tanimura #include <sys/time.h> 8782cd038dSYoshinobu Inoue 8882cd038dSYoshinobu Inoue #include <net/if.h> 8976039bc8SGleb Smirnoff #include <net/if_var.h> 9082cd038dSYoshinobu Inoue #include <net/if_dl.h> 916e6b3f7cSQing Li #include <net/if_llatbl.h> 9282cd038dSYoshinobu Inoue #include <net/if_types.h> 93960ed29cSSeigo Tanimura #include <net/route.h> 944b79449eSBjoern A. Zeeb #include <net/vnet.h> 9582cd038dSYoshinobu Inoue 9682cd038dSYoshinobu Inoue #include <netinet/in.h> 97960ed29cSSeigo Tanimura #include <netinet/in_pcb.h> 9882cd038dSYoshinobu Inoue #include <netinet/in_var.h> 99686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 100686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 10197d8d152SAndre Oppermann #include <netinet/tcp_var.h> 1024b79449eSBjoern A. Zeeb 10382cd038dSYoshinobu Inoue #include <netinet6/in6_ifattach.h> 104960ed29cSSeigo Tanimura #include <netinet6/in6_pcb.h> 10582cd038dSYoshinobu Inoue #include <netinet6/ip6protosw.h> 106960ed29cSSeigo Tanimura #include <netinet6/ip6_var.h> 107a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 108960ed29cSSeigo Tanimura #include <netinet6/mld6_var.h> 109960ed29cSSeigo Tanimura #include <netinet6/nd6.h> 1101db8d1f8SAna Kukec #include <netinet6/send.h> 11182cd038dSYoshinobu Inoue 11282cd038dSYoshinobu Inoue extern struct domain inet6domain; 11397021c24SMarko Zec 114a786f679SAndrey V. Elsukov VNET_PCPUSTAT_DEFINE(struct icmp6stat, icmp6stat); 115a786f679SAndrey V. Elsukov VNET_PCPUSTAT_SYSINIT(icmp6stat); 116a786f679SAndrey V. Elsukov 117a786f679SAndrey V. Elsukov #ifdef VIMAGE 118a786f679SAndrey V. Elsukov VNET_PCPUSTAT_SYSUNINIT(icmp6stat); 119a786f679SAndrey V. Elsukov #endif /* VIMAGE */ 12082cea7e6SBjoern A. Zeeb 121eddfbb76SRobert Watson VNET_DECLARE(struct inpcbinfo, ripcbinfo); 122eddfbb76SRobert Watson VNET_DECLARE(struct inpcbhead, ripcb); 123eddfbb76SRobert Watson VNET_DECLARE(int, icmp6errppslim); 1243e288e62SDimitry Andric static VNET_DEFINE(int, icmp6errpps_count) = 0; 1253e288e62SDimitry Andric static VNET_DEFINE(struct timeval, icmp6errppslim_last); 126eddfbb76SRobert Watson VNET_DECLARE(int, icmp6_nodeinfo); 12782cd038dSYoshinobu Inoue 1281e77c105SRobert Watson #define V_ripcbinfo VNET(ripcbinfo) 1291e77c105SRobert Watson #define V_ripcb VNET(ripcb) 1301e77c105SRobert Watson #define V_icmp6errppslim VNET(icmp6errppslim) 1311e77c105SRobert Watson #define V_icmp6errpps_count VNET(icmp6errpps_count) 1321e77c105SRobert Watson #define V_icmp6errppslim_last VNET(icmp6errppslim_last) 13382cea7e6SBjoern A. Zeeb #define V_icmp6_nodeinfo VNET(icmp6_nodeinfo) 13444e33a07SMarko Zec 13549dc650cSAndrey V. Elsukov static void icmp6_errcount(int, int); 1369233d8f3SDavid E. O'Brien static int icmp6_rip6_input(struct mbuf **, int); 1379233d8f3SDavid E. O'Brien static int icmp6_ratelimit(const struct in6_addr *, const int, const int); 1386f56329aSXin LI static const char *icmp6_redirect_diag(struct in6_addr *, 1396f56329aSXin LI struct in6_addr *, struct in6_addr *); 1409233d8f3SDavid E. O'Brien static struct mbuf *ni6_input(struct mbuf *, int); 1419233d8f3SDavid E. O'Brien static struct mbuf *ni6_nametodns(const char *, int, int); 1429233d8f3SDavid E. O'Brien static int ni6_dnsmatch(const char *, int, const char *, int); 1436f56329aSXin LI static int ni6_addrs(struct icmp6_nodeinfo *, struct mbuf *, 1446f56329aSXin LI struct ifnet **, struct in6_addr *); 1456f56329aSXin LI static int ni6_store_addrs(struct icmp6_nodeinfo *, struct icmp6_nodeinfo *, 1466f56329aSXin LI struct ifnet *, int); 1479233d8f3SDavid E. O'Brien static int icmp6_notify_error(struct mbuf **, int, int, int); 14882cd038dSYoshinobu Inoue 149315e3e38SRobert Watson /* 150315e3e38SRobert Watson * Kernel module interface for updating icmp6stat. The argument is an index 151315e3e38SRobert Watson * into icmp6stat treated as an array of u_quad_t. While this encodes the 152315e3e38SRobert Watson * general layout of icmp6stat into the caller, it doesn't encode its 153315e3e38SRobert Watson * location, so that future changes to add, for example, per-CPU stats 154315e3e38SRobert Watson * support won't cause binary compatibility problems for kernel modules. 155315e3e38SRobert Watson */ 156315e3e38SRobert Watson void 157315e3e38SRobert Watson kmod_icmp6stat_inc(int statnum) 158315e3e38SRobert Watson { 159315e3e38SRobert Watson 160a786f679SAndrey V. Elsukov counter_u64_add(VNET(icmp6stat)[statnum], 1); 161315e3e38SRobert Watson } 162315e3e38SRobert Watson 163686cdd19SJun-ichiro itojun Hagino static void 16449dc650cSAndrey V. Elsukov icmp6_errcount(int type, int code) 165686cdd19SJun-ichiro itojun Hagino { 166686cdd19SJun-ichiro itojun Hagino switch (type) { 167686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH: 168686cdd19SJun-ichiro itojun Hagino switch (code) { 169686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_NOROUTE: 17049dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_odst_unreach_noroute); 171686cdd19SJun-ichiro itojun Hagino return; 172686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADMIN: 17349dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_odst_unreach_admin); 174686cdd19SJun-ichiro itojun Hagino return; 175686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_BEYONDSCOPE: 17649dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_odst_unreach_beyondscope); 177686cdd19SJun-ichiro itojun Hagino return; 178686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADDR: 17949dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_odst_unreach_addr); 180686cdd19SJun-ichiro itojun Hagino return; 181686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_NOPORT: 18249dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_odst_unreach_noport); 183686cdd19SJun-ichiro itojun Hagino return; 184686cdd19SJun-ichiro itojun Hagino } 185686cdd19SJun-ichiro itojun Hagino break; 186686cdd19SJun-ichiro itojun Hagino case ICMP6_PACKET_TOO_BIG: 18749dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_opacket_too_big); 188686cdd19SJun-ichiro itojun Hagino return; 189686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEEDED: 190686cdd19SJun-ichiro itojun Hagino switch (code) { 191686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEED_TRANSIT: 19249dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_otime_exceed_transit); 193686cdd19SJun-ichiro itojun Hagino return; 194686cdd19SJun-ichiro itojun Hagino case ICMP6_TIME_EXCEED_REASSEMBLY: 19549dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_otime_exceed_reassembly); 196686cdd19SJun-ichiro itojun Hagino return; 197686cdd19SJun-ichiro itojun Hagino } 198686cdd19SJun-ichiro itojun Hagino break; 199686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAM_PROB: 200686cdd19SJun-ichiro itojun Hagino switch (code) { 201686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_HEADER: 20249dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_oparamprob_header); 203686cdd19SJun-ichiro itojun Hagino return; 204686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_NEXTHEADER: 20549dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_oparamprob_nextheader); 206686cdd19SJun-ichiro itojun Hagino return; 207686cdd19SJun-ichiro itojun Hagino case ICMP6_PARAMPROB_OPTION: 20849dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_oparamprob_option); 209686cdd19SJun-ichiro itojun Hagino return; 210686cdd19SJun-ichiro itojun Hagino } 211686cdd19SJun-ichiro itojun Hagino break; 212686cdd19SJun-ichiro itojun Hagino case ND_REDIRECT: 21349dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_oredirect); 214686cdd19SJun-ichiro itojun Hagino return; 215686cdd19SJun-ichiro itojun Hagino } 21649dc650cSAndrey V. Elsukov ICMP6STAT_INC(icp6s_ounknown); 217686cdd19SJun-ichiro itojun Hagino } 218686cdd19SJun-ichiro itojun Hagino 21982cd038dSYoshinobu Inoue /* 220a1f7e5f8SHajimu UMEMOTO * A wrapper function for icmp6_error() necessary when the erroneous packet 221a1f7e5f8SHajimu UMEMOTO * may not contain enough scope zone information. 222a1f7e5f8SHajimu UMEMOTO */ 223a1f7e5f8SHajimu UMEMOTO void 2241272577eSXin LI icmp6_error2(struct mbuf *m, int type, int code, int param, 2251272577eSXin LI struct ifnet *ifp) 226a1f7e5f8SHajimu UMEMOTO { 227a1f7e5f8SHajimu UMEMOTO struct ip6_hdr *ip6; 228a1f7e5f8SHajimu UMEMOTO 229a1f7e5f8SHajimu UMEMOTO if (ifp == NULL) 230a1f7e5f8SHajimu UMEMOTO return; 231a1f7e5f8SHajimu UMEMOTO 232a1f7e5f8SHajimu UMEMOTO #ifndef PULLDOWN_TEST 233a1f7e5f8SHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), ); 234a1f7e5f8SHajimu UMEMOTO #else 235a1f7e5f8SHajimu UMEMOTO if (m->m_len < sizeof(struct ip6_hdr)) { 236a1f7e5f8SHajimu UMEMOTO m = m_pullup(m, sizeof(struct ip6_hdr)); 237a1f7e5f8SHajimu UMEMOTO if (m == NULL) 238a1f7e5f8SHajimu UMEMOTO return; 239a1f7e5f8SHajimu UMEMOTO } 240a1f7e5f8SHajimu UMEMOTO #endif 241a1f7e5f8SHajimu UMEMOTO 242a1f7e5f8SHajimu UMEMOTO ip6 = mtod(m, struct ip6_hdr *); 243a1f7e5f8SHajimu UMEMOTO 244a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&ip6->ip6_src, ifp, NULL) != 0) 245a1f7e5f8SHajimu UMEMOTO return; 246a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&ip6->ip6_dst, ifp, NULL) != 0) 247a1f7e5f8SHajimu UMEMOTO return; 248a1f7e5f8SHajimu UMEMOTO 249a1f7e5f8SHajimu UMEMOTO icmp6_error(m, type, code, param); 250a1f7e5f8SHajimu UMEMOTO } 251a1f7e5f8SHajimu UMEMOTO 252a1f7e5f8SHajimu UMEMOTO /* 25382cd038dSYoshinobu Inoue * Generate an error packet of type error in response to bad IP6 packet. 25482cd038dSYoshinobu Inoue */ 25582cd038dSYoshinobu Inoue void 2561272577eSXin LI icmp6_error(struct mbuf *m, int type, int code, int param) 25782cd038dSYoshinobu Inoue { 25882cd038dSYoshinobu Inoue struct ip6_hdr *oip6, *nip6; 25982cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 260686cdd19SJun-ichiro itojun Hagino u_int preplen; 26182cd038dSYoshinobu Inoue int off; 262686cdd19SJun-ichiro itojun Hagino int nxt; 26382cd038dSYoshinobu Inoue 264e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_error); 26582cd038dSYoshinobu Inoue 266686cdd19SJun-ichiro itojun Hagino /* count per-type-code statistics */ 26749dc650cSAndrey V. Elsukov icmp6_errcount(type, code); 26882cd038dSYoshinobu Inoue 269686cdd19SJun-ichiro itojun Hagino #ifdef M_DECRYPTED /*not openbsd*/ 270686cdd19SJun-ichiro itojun Hagino if (m->m_flags & M_DECRYPTED) { 271e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_canterror); 272686cdd19SJun-ichiro itojun Hagino goto freeit; 273686cdd19SJun-ichiro itojun Hagino } 274686cdd19SJun-ichiro itojun Hagino #endif 275686cdd19SJun-ichiro itojun Hagino 276686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 277686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), ); 278686cdd19SJun-ichiro itojun Hagino #else 279686cdd19SJun-ichiro itojun Hagino if (m->m_len < sizeof(struct ip6_hdr)) { 280686cdd19SJun-ichiro itojun Hagino m = m_pullup(m, sizeof(struct ip6_hdr)); 281686cdd19SJun-ichiro itojun Hagino if (m == NULL) 282686cdd19SJun-ichiro itojun Hagino return; 283686cdd19SJun-ichiro itojun Hagino } 284686cdd19SJun-ichiro itojun Hagino #endif 28582cd038dSYoshinobu Inoue oip6 = mtod(m, struct ip6_hdr *); 28682cd038dSYoshinobu Inoue 28782cd038dSYoshinobu Inoue /* 288f95d4633SHajimu UMEMOTO * If the destination address of the erroneous packet is a multicast 289f95d4633SHajimu UMEMOTO * address, or the packet was sent using link-layer multicast, 290f95d4633SHajimu UMEMOTO * we should basically suppress sending an error (RFC 2463, Section 291f95d4633SHajimu UMEMOTO * 2.4). 292f95d4633SHajimu UMEMOTO * We have two exceptions (the item e.2 in that section): 2931767c520SBjoern A. Zeeb * - the Packet Too Big message can be sent for path MTU discovery. 294f95d4633SHajimu UMEMOTO * - the Parameter Problem Message that can be allowed an icmp6 error 295f95d4633SHajimu UMEMOTO * in the option type field. This check has been done in 296f95d4633SHajimu UMEMOTO * ip6_unknown_opt(), so we can just check the type and code. 29782cd038dSYoshinobu Inoue */ 29882cd038dSYoshinobu Inoue if ((m->m_flags & (M_BCAST|M_MCAST) || 29982cd038dSYoshinobu Inoue IN6_IS_ADDR_MULTICAST(&oip6->ip6_dst)) && 30082cd038dSYoshinobu Inoue (type != ICMP6_PACKET_TOO_BIG && 30182cd038dSYoshinobu Inoue (type != ICMP6_PARAM_PROB || 30282cd038dSYoshinobu Inoue code != ICMP6_PARAMPROB_OPTION))) 30382cd038dSYoshinobu Inoue goto freeit; 30482cd038dSYoshinobu Inoue 305f95d4633SHajimu UMEMOTO /* 306f95d4633SHajimu UMEMOTO * RFC 2463, 2.4 (e.5): source address check. 307f95d4633SHajimu UMEMOTO * XXX: the case of anycast source? 308f95d4633SHajimu UMEMOTO */ 30982cd038dSYoshinobu Inoue if (IN6_IS_ADDR_UNSPECIFIED(&oip6->ip6_src) || 31082cd038dSYoshinobu Inoue IN6_IS_ADDR_MULTICAST(&oip6->ip6_src)) 31182cd038dSYoshinobu Inoue goto freeit; 31282cd038dSYoshinobu Inoue 31382cd038dSYoshinobu Inoue /* 314686cdd19SJun-ichiro itojun Hagino * If we are about to send ICMPv6 against ICMPv6 error/redirect, 315686cdd19SJun-ichiro itojun Hagino * don't do it. 31682cd038dSYoshinobu Inoue */ 317686cdd19SJun-ichiro itojun Hagino nxt = -1; 318686cdd19SJun-ichiro itojun Hagino off = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nxt); 319686cdd19SJun-ichiro itojun Hagino if (off >= 0 && nxt == IPPROTO_ICMPV6) { 32082cd038dSYoshinobu Inoue struct icmp6_hdr *icp; 32182cd038dSYoshinobu Inoue 322686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 32382cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, 0, off + sizeof(struct icmp6_hdr), ); 32482cd038dSYoshinobu Inoue icp = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 325686cdd19SJun-ichiro itojun Hagino #else 326686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icp, struct icmp6_hdr *, m, off, 327686cdd19SJun-ichiro itojun Hagino sizeof(*icp)); 328686cdd19SJun-ichiro itojun Hagino if (icp == NULL) { 329e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 330686cdd19SJun-ichiro itojun Hagino return; 331686cdd19SJun-ichiro itojun Hagino } 332686cdd19SJun-ichiro itojun Hagino #endif 333686cdd19SJun-ichiro itojun Hagino if (icp->icmp6_type < ICMP6_ECHO_REQUEST || 334686cdd19SJun-ichiro itojun Hagino icp->icmp6_type == ND_REDIRECT) { 33582cd038dSYoshinobu Inoue /* 33682cd038dSYoshinobu Inoue * ICMPv6 error 33782cd038dSYoshinobu Inoue * Special case: for redirect (which is 33882cd038dSYoshinobu Inoue * informational) we must not send icmp6 error. 33982cd038dSYoshinobu Inoue */ 340e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_canterror); 34182cd038dSYoshinobu Inoue goto freeit; 34282cd038dSYoshinobu Inoue } else { 343686cdd19SJun-ichiro itojun Hagino /* ICMPv6 informational - send the error */ 34482cd038dSYoshinobu Inoue } 345686cdd19SJun-ichiro itojun Hagino } else { 346686cdd19SJun-ichiro itojun Hagino /* non-ICMPv6 - send the error */ 34782cd038dSYoshinobu Inoue } 34882cd038dSYoshinobu Inoue 34982cd038dSYoshinobu Inoue oip6 = mtod(m, struct ip6_hdr *); /* adjust pointer */ 35082cd038dSYoshinobu Inoue 35182cd038dSYoshinobu Inoue /* Finally, do rate limitation check. */ 35282cd038dSYoshinobu Inoue if (icmp6_ratelimit(&oip6->ip6_src, type, code)) { 353e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_toofreq); 35482cd038dSYoshinobu Inoue goto freeit; 35582cd038dSYoshinobu Inoue } 35682cd038dSYoshinobu Inoue 35782cd038dSYoshinobu Inoue /* 35882cd038dSYoshinobu Inoue * OK, ICMP6 can be generated. 35982cd038dSYoshinobu Inoue */ 36082cd038dSYoshinobu Inoue 36182cd038dSYoshinobu Inoue if (m->m_pkthdr.len >= ICMPV6_PLD_MAXLEN) 36282cd038dSYoshinobu Inoue m_adj(m, ICMPV6_PLD_MAXLEN - m->m_pkthdr.len); 36382cd038dSYoshinobu Inoue 364686cdd19SJun-ichiro itojun Hagino preplen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 365eb1b1807SGleb Smirnoff M_PREPEND(m, preplen, M_NOWAIT); /* FIB is also copied over. */ 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 477e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_inhist[icmp6->icmp6_type]); 47829dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_msg); 47982cd038dSYoshinobu Inoue if (icmp6->icmp6_type < ICMP6_INFOMSG_MASK) 48029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_error); 48182cd038dSYoshinobu Inoue 48282cd038dSYoshinobu Inoue switch (icmp6->icmp6_type) { 48382cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH: 48429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_dstunreach); 48582cd038dSYoshinobu Inoue switch (code) { 48682cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_NOROUTE: 48782cd038dSYoshinobu Inoue code = PRC_UNREACH_NET; 48882cd038dSYoshinobu Inoue break; 48982cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_ADMIN: 49029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_adminprohib); 491686cdd19SJun-ichiro itojun Hagino code = PRC_UNREACH_PROTOCOL; /* is this a good code? */ 49282cd038dSYoshinobu Inoue break; 493686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_ADDR: 494686cdd19SJun-ichiro itojun Hagino code = PRC_HOSTDEAD; 495686cdd19SJun-ichiro itojun Hagino break; 496686cdd19SJun-ichiro itojun Hagino case ICMP6_DST_UNREACH_BEYONDSCOPE: 497686cdd19SJun-ichiro itojun Hagino /* I mean "source address was incorrect." */ 498686cdd19SJun-ichiro itojun Hagino code = PRC_PARAMPROB; 499686cdd19SJun-ichiro itojun Hagino break; 50082cd038dSYoshinobu Inoue case ICMP6_DST_UNREACH_NOPORT: 50182cd038dSYoshinobu Inoue code = PRC_UNREACH_PORT; 50282cd038dSYoshinobu Inoue break; 50382cd038dSYoshinobu Inoue default: 50482cd038dSYoshinobu Inoue goto badcode; 50582cd038dSYoshinobu Inoue } 50682cd038dSYoshinobu Inoue goto deliver; 50782cd038dSYoshinobu Inoue break; 50882cd038dSYoshinobu Inoue 50982cd038dSYoshinobu Inoue case ICMP6_PACKET_TOO_BIG: 51029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_pkttoobig); 51182cd038dSYoshinobu Inoue 512aaff9927SHajimu UMEMOTO /* validation is made in icmp6_mtudisc_update */ 513aaff9927SHajimu UMEMOTO 51482cd038dSYoshinobu Inoue code = PRC_MSGSIZE; 51582cd038dSYoshinobu Inoue 516686cdd19SJun-ichiro itojun Hagino /* 517686cdd19SJun-ichiro itojun Hagino * Updating the path MTU will be done after examining 518686cdd19SJun-ichiro itojun Hagino * intermediate extension headers. 519686cdd19SJun-ichiro itojun Hagino */ 52082cd038dSYoshinobu Inoue goto deliver; 52182cd038dSYoshinobu Inoue break; 52282cd038dSYoshinobu Inoue 52382cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEEDED: 52429dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_timeexceed); 52582cd038dSYoshinobu Inoue switch (code) { 52682cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEED_TRANSIT: 5272ce62dceSSUZUKI Shinsuke code = PRC_TIMXCEED_INTRANS; 5282ce62dceSSUZUKI Shinsuke break; 52982cd038dSYoshinobu Inoue case ICMP6_TIME_EXCEED_REASSEMBLY: 5302ce62dceSSUZUKI Shinsuke code = PRC_TIMXCEED_REASS; 53182cd038dSYoshinobu Inoue break; 53282cd038dSYoshinobu Inoue default: 53382cd038dSYoshinobu Inoue goto badcode; 53482cd038dSYoshinobu Inoue } 53582cd038dSYoshinobu Inoue goto deliver; 53682cd038dSYoshinobu Inoue break; 53782cd038dSYoshinobu Inoue 53882cd038dSYoshinobu Inoue case ICMP6_PARAM_PROB: 53929dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_paramprob); 54082cd038dSYoshinobu Inoue switch (code) { 54182cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_NEXTHEADER: 54282cd038dSYoshinobu Inoue code = PRC_UNREACH_PROTOCOL; 54382cd038dSYoshinobu Inoue break; 54482cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_HEADER: 54582cd038dSYoshinobu Inoue case ICMP6_PARAMPROB_OPTION: 54682cd038dSYoshinobu Inoue code = PRC_PARAMPROB; 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_ECHO_REQUEST: 55529dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_echo); 55682cd038dSYoshinobu Inoue if (code != 0) 55782cd038dSYoshinobu Inoue goto badcode; 55882cd038dSYoshinobu Inoue if ((n = m_copy(m, 0, M_COPYALL)) == NULL) { 55982cd038dSYoshinobu Inoue /* Give up remote */ 56082cd038dSYoshinobu Inoue break; 56182cd038dSYoshinobu Inoue } 562f0cace5dSRobert Watson if (!M_WRITABLE(n) 563686cdd19SJun-ichiro itojun Hagino || n->m_len < off + sizeof(struct icmp6_hdr)) { 56482cd038dSYoshinobu Inoue struct mbuf *n0 = n; 5652268ca47SSam Leffler int n0len; 56682cd038dSYoshinobu Inoue 56710e5acc3SGleb Smirnoff CTASSERT(sizeof(*nip6) + sizeof(*nicmp6) <= MHLEN); 5687b07d1beSGleb Smirnoff n = m_gethdr(M_NOWAIT, n0->m_type); 56982cd038dSYoshinobu Inoue if (n == NULL) { 57082cd038dSYoshinobu Inoue /* Give up remote */ 57182cd038dSYoshinobu Inoue m_freem(n0); 57282cd038dSYoshinobu Inoue break; 57382cd038dSYoshinobu Inoue } 57410e5acc3SGleb Smirnoff 57510e5acc3SGleb Smirnoff m_move_pkthdr(n, n0); /* FIB copied. */ 57610e5acc3SGleb Smirnoff n0len = n0->m_pkthdr.len; /* save for use below */ 57782cd038dSYoshinobu Inoue /* 57882cd038dSYoshinobu Inoue * Copy IPv6 and ICMPv6 only. 57982cd038dSYoshinobu Inoue */ 58082cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 58182cd038dSYoshinobu Inoue bcopy(ip6, nip6, sizeof(struct ip6_hdr)); 58282cd038dSYoshinobu Inoue nicmp6 = (struct icmp6_hdr *)(nip6 + 1); 58382cd038dSYoshinobu Inoue bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr)); 58482cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 5852268ca47SSam Leffler /* new mbuf contains only ipv6+icmpv6 headers */ 5862268ca47SSam Leffler n->m_len = noff + sizeof(struct icmp6_hdr); 587686cdd19SJun-ichiro itojun Hagino /* 588686cdd19SJun-ichiro itojun Hagino * Adjust mbuf. ip6_plen will be adjusted in 589686cdd19SJun-ichiro itojun Hagino * ip6_output(). 590686cdd19SJun-ichiro itojun Hagino */ 591686cdd19SJun-ichiro itojun Hagino m_adj(n0, off + sizeof(struct icmp6_hdr)); 5922268ca47SSam Leffler /* recalculate complete packet size */ 5932268ca47SSam Leffler n->m_pkthdr.len = n0len + (noff - off); 594686cdd19SJun-ichiro itojun Hagino n->m_next = n0; 59582cd038dSYoshinobu Inoue } else { 59682cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 5976a550ab3SHajimu UMEMOTO IP6_EXTHDR_GET(nicmp6, struct icmp6_hdr *, n, off, 5986a550ab3SHajimu UMEMOTO sizeof(*nicmp6)); 59982cd038dSYoshinobu Inoue noff = off; 60082cd038dSYoshinobu Inoue } 60182cd038dSYoshinobu Inoue nicmp6->icmp6_type = ICMP6_ECHO_REPLY; 60282cd038dSYoshinobu Inoue nicmp6->icmp6_code = 0; 60382cd038dSYoshinobu Inoue if (n) { 604e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_reflect); 605e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ICMP6_ECHO_REPLY]); 60682cd038dSYoshinobu Inoue icmp6_reflect(n, noff); 60782cd038dSYoshinobu Inoue } 60882cd038dSYoshinobu Inoue break; 60982cd038dSYoshinobu Inoue 61082cd038dSYoshinobu Inoue case ICMP6_ECHO_REPLY: 61129dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_echoreply); 61282cd038dSYoshinobu Inoue if (code != 0) 61382cd038dSYoshinobu Inoue goto badcode; 61482cd038dSYoshinobu Inoue break; 61582cd038dSYoshinobu Inoue 61681170631SHajimu UMEMOTO case MLD_LISTENER_QUERY: 61781170631SHajimu UMEMOTO case MLD_LISTENER_REPORT: 61833cde130SBruce M Simpson case MLD_LISTENER_DONE: 61933cde130SBruce M Simpson case MLDV2_LISTENER_REPORT: 62033cde130SBruce M Simpson /* 62129dc7bc6SBruce M Simpson * Drop MLD traffic which is not link-local, has a hop limit 62229dc7bc6SBruce M Simpson * of greater than 1 hop, or which does not have the 62329dc7bc6SBruce M Simpson * IPv6 HBH Router Alert option. 62429dc7bc6SBruce M Simpson * As IPv6 HBH options are stripped in ip6_input() we must 62529dc7bc6SBruce M Simpson * check an mbuf header flag. 62633cde130SBruce M Simpson * XXX Should we also sanity check that these messages 62733cde130SBruce M Simpson * were directed to a link-local multicast prefix? 62833cde130SBruce M Simpson */ 62929dc7bc6SBruce M Simpson if ((ip6->ip6_hlim != 1) || (m->m_flags & M_RTALERT_MLD) == 0) 630686cdd19SJun-ichiro itojun Hagino goto freeit; 63133cde130SBruce M Simpson if (mld_input(m, off, icmp6len) != 0) 63233cde130SBruce M Simpson return (IPPROTO_DONE); 63382cd038dSYoshinobu Inoue /* m stays. */ 63482cd038dSYoshinobu Inoue break; 63582cd038dSYoshinobu Inoue 63682cd038dSYoshinobu Inoue case ICMP6_WRUREQUEST: /* ICMP6_FQDN_QUERY */ 63782cd038dSYoshinobu Inoue { 63882cd038dSYoshinobu Inoue enum { WRU, FQDN } mode; 63982cd038dSYoshinobu Inoue 640603724d3SBjoern A. Zeeb if (!V_icmp6_nodeinfo) 641686cdd19SJun-ichiro itojun Hagino break; 642686cdd19SJun-ichiro itojun Hagino 64382cd038dSYoshinobu Inoue if (icmp6len == sizeof(struct icmp6_hdr) + 4) 64482cd038dSYoshinobu Inoue mode = WRU; 645686cdd19SJun-ichiro itojun Hagino else if (icmp6len >= sizeof(struct icmp6_nodeinfo)) 64682cd038dSYoshinobu Inoue mode = FQDN; 64782cd038dSYoshinobu Inoue else 64882cd038dSYoshinobu Inoue goto badlen; 64982cd038dSYoshinobu Inoue 65082cd038dSYoshinobu Inoue if (mode == FQDN) { 651686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 65282cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_nodeinfo), 65382cd038dSYoshinobu Inoue IPPROTO_DONE); 654686cdd19SJun-ichiro itojun Hagino #endif 655686cdd19SJun-ichiro itojun Hagino n = m_copy(m, 0, M_COPYALL); 656686cdd19SJun-ichiro itojun Hagino if (n) 657686cdd19SJun-ichiro itojun Hagino n = ni6_input(n, off); 658686cdd19SJun-ichiro itojun Hagino /* XXX meaningless if n == NULL */ 65982cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 66082cd038dSYoshinobu Inoue } else { 66176ca6f88SJamie Gritton struct prison *pr; 66282cd038dSYoshinobu Inoue u_char *p; 66310e5acc3SGleb Smirnoff int maxhlen, hlen; 66482cd038dSYoshinobu Inoue 66518706985SJINMEI Tatuya /* 66618706985SJINMEI Tatuya * XXX: this combination of flags is pointless, 66718706985SJINMEI Tatuya * but should we keep this for compatibility? 66818706985SJINMEI Tatuya */ 669603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & 5) != 5) 67033841545SHajimu UMEMOTO break; 67133841545SHajimu UMEMOTO 672686cdd19SJun-ichiro itojun Hagino if (code != 0) 673686cdd19SJun-ichiro itojun Hagino goto badcode; 67410e5acc3SGleb Smirnoff 67510e5acc3SGleb Smirnoff CTASSERT(sizeof(*nip6) + sizeof(*nicmp6) + 4 <= MHLEN); 67610e5acc3SGleb Smirnoff n = m_gethdr(M_NOWAIT, m->m_type); 67710e5acc3SGleb Smirnoff if (n == NULL) { 678686cdd19SJun-ichiro itojun Hagino /* Give up remote */ 679686cdd19SJun-ichiro itojun Hagino break; 680686cdd19SJun-ichiro itojun Hagino } 68110e5acc3SGleb Smirnoff if (!m_dup_pkthdr(n, m, M_NOWAIT)) { 6829967cafcSSam Leffler /* 6839967cafcSSam Leffler * Previous code did a blind M_COPY_PKTHDR 6849967cafcSSam Leffler * and said "just for rcvif". If true, then 6859967cafcSSam Leffler * we could tolerate the dup failing (due to 6869967cafcSSam Leffler * the deep copy of the tag chain). For now 6879967cafcSSam Leffler * be conservative and just fail. 6889967cafcSSam Leffler */ 6899967cafcSSam Leffler m_free(n); 6909967cafcSSam Leffler n = NULL; 6919967cafcSSam Leffler } 69210e5acc3SGleb Smirnoff maxhlen = M_TRAILINGSPACE(n) - 69310e5acc3SGleb Smirnoff (sizeof(*nip6) + sizeof(*nicmp6) + 4); 69476ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 69576ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 696c1f19219SJamie Gritton hlen = strlen(pr->pr_hostname); 69776ca6f88SJamie Gritton if (maxhlen > hlen) 69876ca6f88SJamie Gritton maxhlen = hlen; 69982cd038dSYoshinobu Inoue /* 70082cd038dSYoshinobu Inoue * Copy IPv6 and ICMPv6 only. 70182cd038dSYoshinobu Inoue */ 70282cd038dSYoshinobu Inoue nip6 = mtod(n, struct ip6_hdr *); 70382cd038dSYoshinobu Inoue bcopy(ip6, nip6, sizeof(struct ip6_hdr)); 70482cd038dSYoshinobu Inoue nicmp6 = (struct icmp6_hdr *)(nip6 + 1); 70582cd038dSYoshinobu Inoue bcopy(icmp6, nicmp6, sizeof(struct icmp6_hdr)); 70682cd038dSYoshinobu Inoue p = (u_char *)(nicmp6 + 1); 70782cd038dSYoshinobu Inoue bzero(p, 4); 708c1f19219SJamie Gritton /* meaningless TTL */ 709c1f19219SJamie Gritton bcopy(pr->pr_hostname, p + 4, maxhlen); 71076ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 71182cd038dSYoshinobu Inoue noff = sizeof(struct ip6_hdr); 71282cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) + 713686cdd19SJun-ichiro itojun Hagino sizeof(struct icmp6_hdr) + 4 + maxhlen; 71482cd038dSYoshinobu Inoue nicmp6->icmp6_type = ICMP6_WRUREPLY; 71582cd038dSYoshinobu Inoue nicmp6->icmp6_code = 0; 71682cd038dSYoshinobu Inoue } 71782cd038dSYoshinobu Inoue if (n) { 718e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_reflect); 719e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ICMP6_WRUREPLY]); 72082cd038dSYoshinobu Inoue icmp6_reflect(n, noff); 72182cd038dSYoshinobu Inoue } 72282cd038dSYoshinobu Inoue break; 72382cd038dSYoshinobu Inoue } 72482cd038dSYoshinobu Inoue 72582cd038dSYoshinobu Inoue case ICMP6_WRUREPLY: 72682cd038dSYoshinobu Inoue if (code != 0) 72782cd038dSYoshinobu Inoue goto badcode; 72882cd038dSYoshinobu Inoue break; 72982cd038dSYoshinobu Inoue 73082cd038dSYoshinobu Inoue case ND_ROUTER_SOLICIT: 73129dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_routersolicit); 73282cd038dSYoshinobu Inoue if (code != 0) 73382cd038dSYoshinobu Inoue goto badcode; 73482cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_router_solicit)) 73582cd038dSYoshinobu Inoue goto badlen; 736eb1b1807SGleb Smirnoff if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) { 737686cdd19SJun-ichiro itojun Hagino /* give up local */ 7381db8d1f8SAna Kukec 7391db8d1f8SAna Kukec /* Send incoming SeND packet to user space. */ 7401db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 7411db8d1f8SAna Kukec IP6_EXTHDR_CHECK(m, off, 7421db8d1f8SAna Kukec icmp6len, IPPROTO_DONE); 7431db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 7441db8d1f8SAna Kukec SND_IN, ip6len); 7451db8d1f8SAna Kukec /* -1 == no app on SEND socket */ 7461db8d1f8SAna Kukec if (error == 0) 7471db8d1f8SAna Kukec return (IPPROTO_DONE); 7481db8d1f8SAna Kukec nd6_rs_input(m, off, icmp6len); 7491db8d1f8SAna Kukec } else 75082cd038dSYoshinobu Inoue nd6_rs_input(m, off, icmp6len); 751686cdd19SJun-ichiro itojun Hagino m = NULL; 752686cdd19SJun-ichiro itojun Hagino goto freeit; 753686cdd19SJun-ichiro itojun Hagino } 7541db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 755e7a6db74SAna Kukec IP6_EXTHDR_CHECK(n, off, 7561db8d1f8SAna Kukec icmp6len, IPPROTO_DONE); 7571db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 7581db8d1f8SAna Kukec SND_IN, ip6len); 759e7a6db74SAna Kukec if (error == 0) 760e7a6db74SAna Kukec goto freeit; 7611db8d1f8SAna Kukec /* -1 == no app on SEND socket */ 7621db8d1f8SAna Kukec nd6_rs_input(n, off, icmp6len); 7631db8d1f8SAna Kukec } else 764686cdd19SJun-ichiro itojun Hagino nd6_rs_input(n, off, icmp6len); 76582cd038dSYoshinobu Inoue /* m stays. */ 76682cd038dSYoshinobu Inoue break; 76782cd038dSYoshinobu Inoue 76882cd038dSYoshinobu Inoue case ND_ROUTER_ADVERT: 76929dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_routeradvert); 77082cd038dSYoshinobu Inoue if (code != 0) 77182cd038dSYoshinobu Inoue goto badcode; 77282cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_router_advert)) 77382cd038dSYoshinobu Inoue goto badlen; 774eb1b1807SGleb Smirnoff if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) { 7751db8d1f8SAna Kukec 7761db8d1f8SAna Kukec /* Send incoming SeND-protected/ND packet to user space. */ 7771db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 7781db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 7791db8d1f8SAna Kukec SND_IN, ip6len); 7801db8d1f8SAna Kukec if (error == 0) 7811db8d1f8SAna Kukec return (IPPROTO_DONE); 7821db8d1f8SAna Kukec nd6_ra_input(m, off, icmp6len); 7831db8d1f8SAna Kukec } else 78482cd038dSYoshinobu Inoue nd6_ra_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) { 7891db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 7901db8d1f8SAna Kukec SND_IN, ip6len); 7911db8d1f8SAna Kukec if (error == 0) 792e7a6db74SAna Kukec goto freeit; 7931db8d1f8SAna Kukec nd6_ra_input(n, off, icmp6len); 7941db8d1f8SAna Kukec } else 795686cdd19SJun-ichiro itojun Hagino nd6_ra_input(n, off, icmp6len); 79682cd038dSYoshinobu Inoue /* m stays. */ 79782cd038dSYoshinobu Inoue break; 79882cd038dSYoshinobu Inoue 79982cd038dSYoshinobu Inoue case ND_NEIGHBOR_SOLICIT: 80029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_neighborsolicit); 80182cd038dSYoshinobu Inoue if (code != 0) 80282cd038dSYoshinobu Inoue goto badcode; 80382cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_neighbor_solicit)) 80482cd038dSYoshinobu Inoue goto badlen; 805eb1b1807SGleb Smirnoff if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) { 8061db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8071db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8081db8d1f8SAna Kukec SND_IN, ip6len); 8091db8d1f8SAna Kukec if (error == 0) 8101db8d1f8SAna Kukec return (IPPROTO_DONE); 81182cd038dSYoshinobu Inoue nd6_ns_input(m, off, icmp6len); 8121db8d1f8SAna Kukec } else 8131db8d1f8SAna Kukec nd6_ns_input(m, off, icmp6len); 814686cdd19SJun-ichiro itojun Hagino m = NULL; 815686cdd19SJun-ichiro itojun Hagino goto freeit; 816686cdd19SJun-ichiro itojun Hagino } 8171db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8181db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8191db8d1f8SAna Kukec SND_IN, ip6len); 8201db8d1f8SAna Kukec if (error == 0) 821e7a6db74SAna Kukec goto freeit; 8221db8d1f8SAna Kukec nd6_ns_input(n, off, icmp6len); 8231db8d1f8SAna Kukec } else 824686cdd19SJun-ichiro itojun Hagino nd6_ns_input(n, off, icmp6len); 82582cd038dSYoshinobu Inoue /* m stays. */ 82682cd038dSYoshinobu Inoue break; 82782cd038dSYoshinobu Inoue 82882cd038dSYoshinobu Inoue case ND_NEIGHBOR_ADVERT: 82929dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_neighboradvert); 83082cd038dSYoshinobu Inoue if (code != 0) 83182cd038dSYoshinobu Inoue goto badcode; 83282cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_neighbor_advert)) 83382cd038dSYoshinobu Inoue goto badlen; 834eb1b1807SGleb Smirnoff if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) { 8351db8d1f8SAna Kukec 8361db8d1f8SAna Kukec /* Send incoming SeND-protected/ND packet to user space. */ 8371db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8381db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8391db8d1f8SAna Kukec SND_IN, ip6len); 8401db8d1f8SAna Kukec if (error == 0) 8411db8d1f8SAna Kukec return (IPPROTO_DONE); 84282cd038dSYoshinobu Inoue nd6_na_input(m, off, icmp6len); 8431db8d1f8SAna Kukec } else 8441db8d1f8SAna Kukec nd6_na_input(m, off, icmp6len); 845686cdd19SJun-ichiro itojun Hagino m = NULL; 846686cdd19SJun-ichiro itojun Hagino goto freeit; 847686cdd19SJun-ichiro itojun Hagino } 8481db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8491db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8501db8d1f8SAna Kukec SND_IN, ip6len); 8511db8d1f8SAna Kukec if (error == 0) 852e7a6db74SAna Kukec goto freeit; 8531db8d1f8SAna Kukec nd6_na_input(n, off, icmp6len); 8541db8d1f8SAna Kukec } else 855686cdd19SJun-ichiro itojun Hagino nd6_na_input(n, off, icmp6len); 85682cd038dSYoshinobu Inoue /* m stays. */ 85782cd038dSYoshinobu Inoue break; 85882cd038dSYoshinobu Inoue 85982cd038dSYoshinobu Inoue case ND_REDIRECT: 86029dc7bc6SBruce M Simpson icmp6_ifstat_inc(ifp, ifs6_in_redirect); 86182cd038dSYoshinobu Inoue if (code != 0) 86282cd038dSYoshinobu Inoue goto badcode; 86382cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct nd_redirect)) 86482cd038dSYoshinobu Inoue goto badlen; 865eb1b1807SGleb Smirnoff if ((n = m_copym(m, 0, M_COPYALL, M_NOWAIT)) == NULL) { 8661db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8671db8d1f8SAna Kukec error = send_sendso_input_hook(m, ifp, 8681db8d1f8SAna Kukec SND_IN, ip6len); 8691db8d1f8SAna Kukec if (error == 0) 8701db8d1f8SAna Kukec return (IPPROTO_DONE); 87182cd038dSYoshinobu Inoue icmp6_redirect_input(m, off); 8721db8d1f8SAna Kukec } else 8731db8d1f8SAna Kukec icmp6_redirect_input(m, off); 874686cdd19SJun-ichiro itojun Hagino m = NULL; 875686cdd19SJun-ichiro itojun Hagino goto freeit; 876686cdd19SJun-ichiro itojun Hagino } 8771db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 8781db8d1f8SAna Kukec error = send_sendso_input_hook(n, ifp, 8791db8d1f8SAna Kukec SND_IN, ip6len); 8801db8d1f8SAna Kukec if (error == 0) 881e7a6db74SAna Kukec goto freeit; 8821db8d1f8SAna Kukec icmp6_redirect_input(n, off); 8831db8d1f8SAna Kukec } else 884686cdd19SJun-ichiro itojun Hagino icmp6_redirect_input(n, off); 88582cd038dSYoshinobu Inoue /* m stays. */ 88682cd038dSYoshinobu Inoue break; 88782cd038dSYoshinobu Inoue 88882cd038dSYoshinobu Inoue case ICMP6_ROUTER_RENUMBERING: 88982cd038dSYoshinobu Inoue if (code != ICMP6_ROUTER_RENUMBERING_COMMAND && 89082cd038dSYoshinobu Inoue code != ICMP6_ROUTER_RENUMBERING_RESULT) 89182cd038dSYoshinobu Inoue goto badcode; 89282cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct icmp6_router_renum)) 89382cd038dSYoshinobu Inoue goto badlen; 89482cd038dSYoshinobu Inoue break; 89582cd038dSYoshinobu Inoue 89682cd038dSYoshinobu Inoue default: 89733841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 89833841545SHajimu UMEMOTO "icmp6_input: unknown type %d(src=%s, dst=%s, ifid=%d)\n", 8991d54aa3bSBjoern A. Zeeb icmp6->icmp6_type, ip6_sprintf(ip6bufs, &ip6->ip6_src), 9001d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6bufd, &ip6->ip6_dst), 90129dc7bc6SBruce M Simpson ifp ? ifp->if_index : 0)); 90282cd038dSYoshinobu Inoue if (icmp6->icmp6_type < ICMP6_ECHO_REQUEST) { 90382cd038dSYoshinobu Inoue /* ICMPv6 error: MUST deliver it by spec... */ 90482cd038dSYoshinobu Inoue code = PRC_NCMDS; 90582cd038dSYoshinobu Inoue /* deliver */ 90682cd038dSYoshinobu Inoue } else { 90782cd038dSYoshinobu Inoue /* ICMPv6 informational: MUST not deliver */ 90882cd038dSYoshinobu Inoue break; 90982cd038dSYoshinobu Inoue } 91082cd038dSYoshinobu Inoue deliver: 91114c129fcSBjoern A. Zeeb if (icmp6_notify_error(&m, off, icmp6len, code) != 0) { 91233841545SHajimu UMEMOTO /* In this case, m should've been freed. */ 91333841545SHajimu UMEMOTO return (IPPROTO_DONE); 91433841545SHajimu UMEMOTO } 91533841545SHajimu UMEMOTO break; 91633841545SHajimu UMEMOTO 91733841545SHajimu UMEMOTO badcode: 918e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badcode); 91933841545SHajimu UMEMOTO break; 92033841545SHajimu UMEMOTO 92133841545SHajimu UMEMOTO badlen: 922e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badlen); 92333841545SHajimu UMEMOTO break; 92433841545SHajimu UMEMOTO } 92533841545SHajimu UMEMOTO 92633841545SHajimu UMEMOTO /* deliver the packet to appropriate sockets */ 92733841545SHajimu UMEMOTO icmp6_rip6_input(&m, *offp); 92833841545SHajimu UMEMOTO 92933841545SHajimu UMEMOTO return IPPROTO_DONE; 93033841545SHajimu UMEMOTO 93133841545SHajimu UMEMOTO freeit: 93233841545SHajimu UMEMOTO m_freem(m); 93333841545SHajimu UMEMOTO return IPPROTO_DONE; 93433841545SHajimu UMEMOTO } 93533841545SHajimu UMEMOTO 93633841545SHajimu UMEMOTO static int 9371272577eSXin LI icmp6_notify_error(struct mbuf **mp, int off, int icmp6len, int code) 93833841545SHajimu UMEMOTO { 9399c0fda72SHajimu UMEMOTO struct mbuf *m = *mp; 94033841545SHajimu UMEMOTO struct icmp6_hdr *icmp6; 94133841545SHajimu UMEMOTO struct ip6_hdr *eip6; 94233841545SHajimu UMEMOTO u_int32_t notifymtu; 94333841545SHajimu UMEMOTO struct sockaddr_in6 icmp6src, icmp6dst; 94433841545SHajimu UMEMOTO 94582cd038dSYoshinobu Inoue if (icmp6len < sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr)) { 946e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 94782cd038dSYoshinobu Inoue goto freeit; 94882cd038dSYoshinobu Inoue } 949686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 95082cd038dSYoshinobu Inoue IP6_EXTHDR_CHECK(m, off, 95106cd0a3fSHajimu UMEMOTO sizeof(struct icmp6_hdr) + sizeof(struct ip6_hdr), -1); 95282cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 953686cdd19SJun-ichiro itojun Hagino #else 954686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, 955686cdd19SJun-ichiro itojun Hagino sizeof(*icmp6) + sizeof(struct ip6_hdr)); 956686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 957e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 95833841545SHajimu UMEMOTO return (-1); 959686cdd19SJun-ichiro itojun Hagino } 960686cdd19SJun-ichiro itojun Hagino #endif 96133841545SHajimu UMEMOTO eip6 = (struct ip6_hdr *)(icmp6 + 1); 96282cd038dSYoshinobu Inoue 96382cd038dSYoshinobu Inoue /* Detect the upper level protocol */ 96482cd038dSYoshinobu Inoue { 9659233d8f3SDavid E. O'Brien void (*ctlfunc)(int, struct sockaddr *, void *); 96682cd038dSYoshinobu Inoue u_int8_t nxt = eip6->ip6_nxt; 96782cd038dSYoshinobu Inoue int eoff = off + sizeof(struct icmp6_hdr) + 96882cd038dSYoshinobu Inoue sizeof(struct ip6_hdr); 96982cd038dSYoshinobu Inoue struct ip6ctlparam ip6cp; 970686cdd19SJun-ichiro itojun Hagino struct in6_addr *finaldst = NULL; 971686cdd19SJun-ichiro itojun Hagino int icmp6type = icmp6->icmp6_type; 972686cdd19SJun-ichiro itojun Hagino struct ip6_frag *fh; 973686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr *rth; 974686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr0 *rth0; 975686cdd19SJun-ichiro itojun Hagino int rthlen; 97682cd038dSYoshinobu Inoue 97788ff5695SSUZUKI Shinsuke while (1) { /* XXX: should avoid infinite loop explicitly? */ 97882cd038dSYoshinobu Inoue struct ip6_ext *eh; 97982cd038dSYoshinobu Inoue 98082cd038dSYoshinobu Inoue switch (nxt) { 98182cd038dSYoshinobu Inoue case IPPROTO_HOPOPTS: 98282cd038dSYoshinobu Inoue case IPPROTO_DSTOPTS: 98382cd038dSYoshinobu Inoue case IPPROTO_AH: 984686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 98506cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, 98606cd0a3fSHajimu UMEMOTO eoff + sizeof(struct ip6_ext), -1); 9870527d333SHajimu UMEMOTO eh = (struct ip6_ext *)(mtod(m, caddr_t) + eoff); 988686cdd19SJun-ichiro itojun Hagino #else 989686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(eh, struct ip6_ext *, m, 990686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*eh)); 991686cdd19SJun-ichiro itojun Hagino if (eh == NULL) { 992e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 99333841545SHajimu UMEMOTO return (-1); 994686cdd19SJun-ichiro itojun Hagino } 995686cdd19SJun-ichiro itojun Hagino #endif 996686cdd19SJun-ichiro itojun Hagino 99782cd038dSYoshinobu Inoue if (nxt == IPPROTO_AH) 99882cd038dSYoshinobu Inoue eoff += (eh->ip6e_len + 2) << 2; 99982cd038dSYoshinobu Inoue else 100082cd038dSYoshinobu Inoue eoff += (eh->ip6e_len + 1) << 3; 100182cd038dSYoshinobu Inoue nxt = eh->ip6e_nxt; 100282cd038dSYoshinobu Inoue break; 1003686cdd19SJun-ichiro itojun Hagino case IPPROTO_ROUTING: 1004686cdd19SJun-ichiro itojun Hagino /* 1005686cdd19SJun-ichiro itojun Hagino * When the erroneous packet contains a 1006686cdd19SJun-ichiro itojun Hagino * routing header, we should examine the 1007686cdd19SJun-ichiro itojun Hagino * header to determine the final destination. 1008686cdd19SJun-ichiro itojun Hagino * Otherwise, we can't properly update 1009686cdd19SJun-ichiro itojun Hagino * information that depends on the final 1010686cdd19SJun-ichiro itojun Hagino * destination (e.g. path MTU). 1011686cdd19SJun-ichiro itojun Hagino */ 1012686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 101306cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, eoff + sizeof(*rth), -1); 101406cd0a3fSHajimu UMEMOTO rth = (struct ip6_rthdr *) 101506cd0a3fSHajimu UMEMOTO (mtod(m, caddr_t) + eoff); 1016686cdd19SJun-ichiro itojun Hagino #else 1017686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(rth, struct ip6_rthdr *, m, 1018686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*rth)); 1019686cdd19SJun-ichiro itojun Hagino if (rth == NULL) { 1020e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 102133841545SHajimu UMEMOTO return (-1); 1022686cdd19SJun-ichiro itojun Hagino } 1023686cdd19SJun-ichiro itojun Hagino #endif 1024686cdd19SJun-ichiro itojun Hagino rthlen = (rth->ip6r_len + 1) << 3; 1025686cdd19SJun-ichiro itojun Hagino /* 1026686cdd19SJun-ichiro itojun Hagino * XXX: currently there is no 1027686cdd19SJun-ichiro itojun Hagino * officially defined type other 1028686cdd19SJun-ichiro itojun Hagino * than type-0. 1029686cdd19SJun-ichiro itojun Hagino * Note that if the segment left field 1030686cdd19SJun-ichiro itojun Hagino * is 0, all intermediate hops must 1031686cdd19SJun-ichiro itojun Hagino * have been passed. 1032686cdd19SJun-ichiro itojun Hagino */ 1033686cdd19SJun-ichiro itojun Hagino if (rth->ip6r_segleft && 1034686cdd19SJun-ichiro itojun Hagino rth->ip6r_type == IPV6_RTHDR_TYPE_0) { 1035686cdd19SJun-ichiro itojun Hagino int hops; 1036686cdd19SJun-ichiro itojun Hagino 1037686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 103806cd0a3fSHajimu UMEMOTO IP6_EXTHDR_CHECK(m, 0, eoff + rthlen, -1); 103906cd0a3fSHajimu UMEMOTO rth0 = (struct ip6_rthdr0 *) 104006cd0a3fSHajimu UMEMOTO (mtod(m, caddr_t) + eoff); 1041686cdd19SJun-ichiro itojun Hagino #else 1042686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(rth0, 1043686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr0 *, m, 1044686cdd19SJun-ichiro itojun Hagino eoff, rthlen); 1045686cdd19SJun-ichiro itojun Hagino if (rth0 == NULL) { 1046e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 104733841545SHajimu UMEMOTO return (-1); 1048686cdd19SJun-ichiro itojun Hagino } 1049686cdd19SJun-ichiro itojun Hagino #endif 1050686cdd19SJun-ichiro itojun Hagino /* just ignore a bogus header */ 1051686cdd19SJun-ichiro itojun Hagino if ((rth0->ip6r0_len % 2) == 0 && 1052686cdd19SJun-ichiro itojun Hagino (hops = rth0->ip6r0_len/2)) 1053686cdd19SJun-ichiro itojun Hagino finaldst = (struct in6_addr *)(rth0 + 1) + (hops - 1); 1054686cdd19SJun-ichiro itojun Hagino } 1055686cdd19SJun-ichiro itojun Hagino eoff += rthlen; 1056686cdd19SJun-ichiro itojun Hagino nxt = rth->ip6r_nxt; 1057686cdd19SJun-ichiro itojun Hagino break; 1058686cdd19SJun-ichiro itojun Hagino case IPPROTO_FRAGMENT: 1059686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 1060686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, 0, eoff + 106106cd0a3fSHajimu UMEMOTO sizeof(struct ip6_frag), -1); 106206cd0a3fSHajimu UMEMOTO fh = (struct ip6_frag *)(mtod(m, caddr_t) + 106306cd0a3fSHajimu UMEMOTO eoff); 1064686cdd19SJun-ichiro itojun Hagino #else 1065686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(fh, struct ip6_frag *, m, 1066686cdd19SJun-ichiro itojun Hagino eoff, sizeof(*fh)); 1067686cdd19SJun-ichiro itojun Hagino if (fh == NULL) { 1068e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 106933841545SHajimu UMEMOTO return (-1); 1070686cdd19SJun-ichiro itojun Hagino } 1071686cdd19SJun-ichiro itojun Hagino #endif 1072686cdd19SJun-ichiro itojun Hagino /* 1073686cdd19SJun-ichiro itojun Hagino * Data after a fragment header is meaningless 1074686cdd19SJun-ichiro itojun Hagino * unless it is the first fragment, but 1075686cdd19SJun-ichiro itojun Hagino * we'll go to the notify label for path MTU 1076686cdd19SJun-ichiro itojun Hagino * discovery. 1077686cdd19SJun-ichiro itojun Hagino */ 1078686cdd19SJun-ichiro itojun Hagino if (fh->ip6f_offlg & IP6F_OFF_MASK) 1079686cdd19SJun-ichiro itojun Hagino goto notify; 1080686cdd19SJun-ichiro itojun Hagino 1081686cdd19SJun-ichiro itojun Hagino eoff += sizeof(struct ip6_frag); 1082686cdd19SJun-ichiro itojun Hagino nxt = fh->ip6f_nxt; 1083686cdd19SJun-ichiro itojun Hagino break; 108482cd038dSYoshinobu Inoue default: 1085686cdd19SJun-ichiro itojun Hagino /* 1086686cdd19SJun-ichiro itojun Hagino * This case includes ESP and the No Next 1087686cdd19SJun-ichiro itojun Hagino * Header. In such cases going to the notify 1088686cdd19SJun-ichiro itojun Hagino * label does not have any meaning 1089686cdd19SJun-ichiro itojun Hagino * (i.e. ctlfunc will be NULL), but we go 1090686cdd19SJun-ichiro itojun Hagino * anyway since we might have to update 1091686cdd19SJun-ichiro itojun Hagino * path MTU information. 1092686cdd19SJun-ichiro itojun Hagino */ 109382cd038dSYoshinobu Inoue goto notify; 109482cd038dSYoshinobu Inoue } 109582cd038dSYoshinobu Inoue } 109682cd038dSYoshinobu Inoue notify: 1097686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 109882cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off); 1099686cdd19SJun-ichiro itojun Hagino #else 1100686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, 1101686cdd19SJun-ichiro itojun Hagino sizeof(*icmp6) + sizeof(struct ip6_hdr)); 1102686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 1103e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 110433841545SHajimu UMEMOTO return (-1); 1105686cdd19SJun-ichiro itojun Hagino } 1106686cdd19SJun-ichiro itojun Hagino #endif 110733841545SHajimu UMEMOTO 110806cd0a3fSHajimu UMEMOTO /* 110906cd0a3fSHajimu UMEMOTO * retrieve parameters from the inner IPv6 header, and convert 111006cd0a3fSHajimu UMEMOTO * them into sockaddr structures. 111106cd0a3fSHajimu UMEMOTO * XXX: there is no guarantee that the source or destination 111206cd0a3fSHajimu UMEMOTO * addresses of the inner packet are in the same scope as 111306cd0a3fSHajimu UMEMOTO * the addresses of the icmp packet. But there is no other 111406cd0a3fSHajimu UMEMOTO * way to determine the zone. 111506cd0a3fSHajimu UMEMOTO */ 111633841545SHajimu UMEMOTO eip6 = (struct ip6_hdr *)(icmp6 + 1); 111706cd0a3fSHajimu UMEMOTO 111833841545SHajimu UMEMOTO bzero(&icmp6dst, sizeof(icmp6dst)); 111933841545SHajimu UMEMOTO icmp6dst.sin6_len = sizeof(struct sockaddr_in6); 112033841545SHajimu UMEMOTO icmp6dst.sin6_family = AF_INET6; 1121686cdd19SJun-ichiro itojun Hagino if (finaldst == NULL) 112233841545SHajimu UMEMOTO icmp6dst.sin6_addr = eip6->ip6_dst; 112333841545SHajimu UMEMOTO else 112433841545SHajimu UMEMOTO icmp6dst.sin6_addr = *finaldst; 1125a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&icmp6dst.sin6_addr, m->m_pkthdr.rcvif, NULL)) 11269a4f9608SHajimu UMEMOTO goto freeit; 112733841545SHajimu UMEMOTO bzero(&icmp6src, sizeof(icmp6src)); 112833841545SHajimu UMEMOTO icmp6src.sin6_len = sizeof(struct sockaddr_in6); 112933841545SHajimu UMEMOTO icmp6src.sin6_family = AF_INET6; 113033841545SHajimu UMEMOTO icmp6src.sin6_addr = eip6->ip6_src; 1131a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&icmp6src.sin6_addr, m->m_pkthdr.rcvif, NULL)) 11329a4f9608SHajimu UMEMOTO goto freeit; 1133a1f7e5f8SHajimu UMEMOTO icmp6src.sin6_flowinfo = 1134a1f7e5f8SHajimu UMEMOTO (eip6->ip6_flow & IPV6_FLOWLABEL_MASK); 113533841545SHajimu UMEMOTO 113633841545SHajimu UMEMOTO if (finaldst == NULL) 113733841545SHajimu UMEMOTO finaldst = &eip6->ip6_dst; 113833841545SHajimu UMEMOTO ip6cp.ip6c_m = m; 113933841545SHajimu UMEMOTO ip6cp.ip6c_icmp6 = icmp6; 114033841545SHajimu UMEMOTO ip6cp.ip6c_ip6 = (struct ip6_hdr *)(icmp6 + 1); 114133841545SHajimu UMEMOTO ip6cp.ip6c_off = eoff; 114233841545SHajimu UMEMOTO ip6cp.ip6c_finaldst = finaldst; 114333841545SHajimu UMEMOTO ip6cp.ip6c_src = &icmp6src; 114433841545SHajimu UMEMOTO ip6cp.ip6c_nxt = nxt; 114533841545SHajimu UMEMOTO 114633841545SHajimu UMEMOTO if (icmp6type == ICMP6_PACKET_TOO_BIG) { 114733841545SHajimu UMEMOTO notifymtu = ntohl(icmp6->icmp6_mtu); 114833841545SHajimu UMEMOTO ip6cp.ip6c_cmdarg = (void *)¬ifymtu; 114933841545SHajimu UMEMOTO icmp6_mtudisc_update(&ip6cp, 1); /*XXX*/ 1150686cdd19SJun-ichiro itojun Hagino } 1151686cdd19SJun-ichiro itojun Hagino 11529233d8f3SDavid E. O'Brien ctlfunc = (void (*)(int, struct sockaddr *, void *)) 115382cd038dSYoshinobu Inoue (inet6sw[ip6_protox[nxt]].pr_ctlinput); 115482cd038dSYoshinobu Inoue if (ctlfunc) { 115533841545SHajimu UMEMOTO (void) (*ctlfunc)(code, (struct sockaddr *)&icmp6dst, 115633841545SHajimu UMEMOTO &ip6cp); 115782cd038dSYoshinobu Inoue } 115882cd038dSYoshinobu Inoue } 11599c0fda72SHajimu UMEMOTO *mp = m; 116033841545SHajimu UMEMOTO return (0); 116182cd038dSYoshinobu Inoue 116282cd038dSYoshinobu Inoue freeit: 116382cd038dSYoshinobu Inoue m_freem(m); 116433841545SHajimu UMEMOTO return (-1); 116582cd038dSYoshinobu Inoue } 116682cd038dSYoshinobu Inoue 116733841545SHajimu UMEMOTO void 11681272577eSXin LI icmp6_mtudisc_update(struct ip6ctlparam *ip6cp, int validated) 1169686cdd19SJun-ichiro itojun Hagino { 117033841545SHajimu UMEMOTO struct in6_addr *dst = ip6cp->ip6c_finaldst; 117133841545SHajimu UMEMOTO struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6; 117233841545SHajimu UMEMOTO struct mbuf *m = ip6cp->ip6c_m; /* will be necessary for scope issue */ 1173686cdd19SJun-ichiro itojun Hagino u_int mtu = ntohl(icmp6->icmp6_mtu); 117497d8d152SAndre Oppermann struct in_conninfo inc; 1175686cdd19SJun-ichiro itojun Hagino 1176f95d4633SHajimu UMEMOTO #if 0 1177f95d4633SHajimu UMEMOTO /* 1178f95d4633SHajimu UMEMOTO * RFC2460 section 5, last paragraph. 1179f95d4633SHajimu UMEMOTO * even though minimum link MTU for IPv6 is IPV6_MMTU, 1180f95d4633SHajimu UMEMOTO * we may see ICMPv6 too big with mtu < IPV6_MMTU 1181f95d4633SHajimu UMEMOTO * due to packet translator in the middle. 1182f95d4633SHajimu UMEMOTO * see ip6_output() and ip6_getpmtu() "alwaysfrag" case for 1183f95d4633SHajimu UMEMOTO * special handling. 1184f95d4633SHajimu UMEMOTO */ 1185f95d4633SHajimu UMEMOTO if (mtu < IPV6_MMTU) 1186f95d4633SHajimu UMEMOTO return; 1187f95d4633SHajimu UMEMOTO #endif 1188f95d4633SHajimu UMEMOTO 1189f95d4633SHajimu UMEMOTO /* 1190f95d4633SHajimu UMEMOTO * we reject ICMPv6 too big with abnormally small value. 1191f95d4633SHajimu UMEMOTO * XXX what is the good definition of "abnormally small"? 1192f95d4633SHajimu UMEMOTO */ 1193f95d4633SHajimu UMEMOTO if (mtu < sizeof(struct ip6_hdr) + sizeof(struct ip6_frag) + 8) 1194f95d4633SHajimu UMEMOTO return; 1195f95d4633SHajimu UMEMOTO 119633841545SHajimu UMEMOTO if (!validated) 119733841545SHajimu UMEMOTO return; 119833841545SHajimu UMEMOTO 119959ca51adSSimon L. B. Nielsen /* 120059ca51adSSimon L. B. Nielsen * In case the suggested mtu is less than IPV6_MMTU, we 120159ca51adSSimon L. B. Nielsen * only need to remember that it was for above mentioned 120259ca51adSSimon L. B. Nielsen * "alwaysfrag" case. 120359ca51adSSimon L. B. Nielsen * Try to be as close to the spec as possible. 120459ca51adSSimon L. B. Nielsen */ 120559ca51adSSimon L. B. Nielsen if (mtu < IPV6_MMTU) 120659ca51adSSimon L. B. Nielsen mtu = IPV6_MMTU - 8; 120759ca51adSSimon L. B. Nielsen 120897d8d152SAndre Oppermann bzero(&inc, sizeof(inc)); 1209baa09f18SAndrey V. Elsukov inc.inc_fibnum = M_GETFIB(m); 1210dcdb4371SBjoern A. Zeeb inc.inc_flags |= INC_ISIPV6; 121197d8d152SAndre Oppermann inc.inc6_faddr = *dst; 1212a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&inc.inc6_faddr, m->m_pkthdr.rcvif, NULL)) 1213a1f7e5f8SHajimu UMEMOTO return; 1214686cdd19SJun-ichiro itojun Hagino 1215233dcce1SAndre Oppermann if (mtu < tcp_maxmtu6(&inc, NULL)) { 121697d8d152SAndre Oppermann tcp_hc_updatemtu(&inc, mtu); 1217e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_pmtuchg); 1218686cdd19SJun-ichiro itojun Hagino } 1219686cdd19SJun-ichiro itojun Hagino } 1220686cdd19SJun-ichiro itojun Hagino 122182cd038dSYoshinobu Inoue /* 122233841545SHajimu UMEMOTO * Process a Node Information Query packet, based on 122333841545SHajimu UMEMOTO * draft-ietf-ipngwg-icmp-name-lookups-07. 1224686cdd19SJun-ichiro itojun Hagino * 1225686cdd19SJun-ichiro itojun Hagino * Spec incompatibilities: 1226686cdd19SJun-ichiro itojun Hagino * - IPv6 Subject address handling 1227686cdd19SJun-ichiro itojun Hagino * - IPv4 Subject address handling support missing 1228686cdd19SJun-ichiro itojun Hagino * - Proxy reply (answer even if it's not for me) 1229686cdd19SJun-ichiro itojun Hagino * - joins NI group address at in6_ifattach() time only, does not cope 1230686cdd19SJun-ichiro itojun Hagino * with hostname changes by sethostname(3) 123182cd038dSYoshinobu Inoue */ 123282cd038dSYoshinobu Inoue static struct mbuf * 12331272577eSXin LI ni6_input(struct mbuf *m, int off) 123482cd038dSYoshinobu Inoue { 1235686cdd19SJun-ichiro itojun Hagino struct icmp6_nodeinfo *ni6, *nni6; 123682cd038dSYoshinobu Inoue struct mbuf *n = NULL; 123776ca6f88SJamie Gritton struct prison *pr; 1238686cdd19SJun-ichiro itojun Hagino u_int16_t qtype; 1239686cdd19SJun-ichiro itojun Hagino int subjlen; 124082cd038dSYoshinobu Inoue int replylen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo); 124182cd038dSYoshinobu Inoue struct ni_reply_fqdn *fqdn; 124282cd038dSYoshinobu Inoue int addrs; /* for NI_QTYPE_NODEADDR */ 124382cd038dSYoshinobu Inoue struct ifnet *ifp = NULL; /* for NI_QTYPE_NODEADDR */ 1244a1f7e5f8SHajimu UMEMOTO struct in6_addr in6_subj; /* subject address */ 1245686cdd19SJun-ichiro itojun Hagino struct ip6_hdr *ip6; 1246686cdd19SJun-ichiro itojun Hagino int oldfqdn = 0; /* if 1, return pascal string (03 draft) */ 124733841545SHajimu UMEMOTO char *subj = NULL; 124833841545SHajimu UMEMOTO struct in6_ifaddr *ia6 = NULL; 124982cd038dSYoshinobu Inoue 1250686cdd19SJun-ichiro itojun Hagino ip6 = mtod(m, struct ip6_hdr *); 1251686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 1252686cdd19SJun-ichiro itojun Hagino ni6 = (struct icmp6_nodeinfo *)(mtod(m, caddr_t) + off); 1253686cdd19SJun-ichiro itojun Hagino #else 1254686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(ni6, struct icmp6_nodeinfo *, m, off, sizeof(*ni6)); 1255686cdd19SJun-ichiro itojun Hagino if (ni6 == NULL) { 1256686cdd19SJun-ichiro itojun Hagino /* m is already reclaimed */ 125706cd0a3fSHajimu UMEMOTO return (NULL); 1258686cdd19SJun-ichiro itojun Hagino } 1259686cdd19SJun-ichiro itojun Hagino #endif 1260686cdd19SJun-ichiro itojun Hagino 1261686cdd19SJun-ichiro itojun Hagino /* 126218706985SJINMEI Tatuya * Validate IPv6 source address. 126318706985SJINMEI Tatuya * The default configuration MUST be to refuse answering queries from 126418706985SJINMEI Tatuya * global-scope addresses according to RFC4602. 126518706985SJINMEI Tatuya * Notes: 126618706985SJINMEI Tatuya * - it's not very clear what "refuse" means; this implementation 126718706985SJINMEI Tatuya * simply drops it. 126818706985SJINMEI Tatuya * - it's not very easy to identify global-scope (unicast) addresses 126918706985SJINMEI Tatuya * since there are many prefixes for them. It should be safer 127018706985SJINMEI Tatuya * and in practice sufficient to check "all" but loopback and 127118706985SJINMEI Tatuya * link-local (note that site-local unicast was deprecated and 127218706985SJINMEI Tatuya * ULA is defined as global scope-wise) 127318706985SJINMEI Tatuya */ 1274603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_GLOBALOK) == 0 && 127518706985SJINMEI Tatuya !IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) && 127618706985SJINMEI Tatuya !IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src)) 127718706985SJINMEI Tatuya goto bad; 127818706985SJINMEI Tatuya 127918706985SJINMEI Tatuya /* 1280686cdd19SJun-ichiro itojun Hagino * Validate IPv6 destination address. 1281686cdd19SJun-ichiro itojun Hagino * 128233841545SHajimu UMEMOTO * The Responder must discard the Query without further processing 128333841545SHajimu UMEMOTO * unless it is one of the Responder's unicast or anycast addresses, or 128433841545SHajimu UMEMOTO * a link-local scope multicast address which the Responder has joined. 128518706985SJINMEI Tatuya * [RFC4602, Section 5.] 1286686cdd19SJun-ichiro itojun Hagino */ 12872a5aafceSHajimu UMEMOTO if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 12882a5aafceSHajimu UMEMOTO if (!IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst)) 12892a5aafceSHajimu UMEMOTO goto bad; 12902a5aafceSHajimu UMEMOTO /* else it's a link-local multicast, fine */ 12912a5aafceSHajimu UMEMOTO } else { /* unicast or anycast */ 12923e88eb90SAndrey V. Elsukov ia6 = in6ifa_ifwithaddr(&ip6->ip6_dst, 0 /* XXX */); 12933e88eb90SAndrey V. Elsukov if (ia6 == NULL) 12942a5aafceSHajimu UMEMOTO goto bad; /* XXX impossible */ 12952a5aafceSHajimu UMEMOTO 12962a5aafceSHajimu UMEMOTO if ((ia6->ia6_flags & IN6_IFF_TEMPORARY) && 1297603724d3SBjoern A. Zeeb !(V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK)) { 12988c0fec80SRobert Watson ifa_free(&ia6->ia_ifa); 129933841545SHajimu UMEMOTO nd6log((LOG_DEBUG, "ni6_input: ignore node info to " 130033841545SHajimu UMEMOTO "a temporary address in %s:%d", 130133841545SHajimu UMEMOTO __FILE__, __LINE__)); 130233841545SHajimu UMEMOTO goto bad; 130333841545SHajimu UMEMOTO } 13048c0fec80SRobert Watson ifa_free(&ia6->ia_ifa); 13052a5aafceSHajimu UMEMOTO } 1306686cdd19SJun-ichiro itojun Hagino 1307686cdd19SJun-ichiro itojun Hagino /* validate query Subject field. */ 130833841545SHajimu UMEMOTO qtype = ntohs(ni6->ni_qtype); 1309686cdd19SJun-ichiro itojun Hagino subjlen = m->m_pkthdr.len - off - sizeof(struct icmp6_nodeinfo); 1310686cdd19SJun-ichiro itojun Hagino switch (qtype) { 1311686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_NOOP: 1312686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_SUPTYPES: 131333841545SHajimu UMEMOTO /* 07 draft */ 131433841545SHajimu UMEMOTO if (ni6->ni_code == ICMP6_NI_SUBJ_FQDN && subjlen == 0) 1315686cdd19SJun-ichiro itojun Hagino break; 131633841545SHajimu UMEMOTO /* FALLTHROUGH */ 1317686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_FQDN: 1318686cdd19SJun-ichiro itojun Hagino case NI_QTYPE_NODEADDR: 1319a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1320686cdd19SJun-ichiro itojun Hagino switch (ni6->ni_code) { 1321686cdd19SJun-ichiro itojun Hagino case ICMP6_NI_SUBJ_IPV6: 1322686cdd19SJun-ichiro itojun Hagino #if ICMP6_NI_SUBJ_IPV6 != 0 1323686cdd19SJun-ichiro itojun Hagino case 0: 1324686cdd19SJun-ichiro itojun Hagino #endif 1325686cdd19SJun-ichiro itojun Hagino /* 1326686cdd19SJun-ichiro itojun Hagino * backward compatibility - try to accept 03 draft 1327686cdd19SJun-ichiro itojun Hagino * format, where no Subject is present. 1328686cdd19SJun-ichiro itojun Hagino */ 132933841545SHajimu UMEMOTO if (qtype == NI_QTYPE_FQDN && ni6->ni_code == 0 && 133033841545SHajimu UMEMOTO subjlen == 0) { 1331686cdd19SJun-ichiro itojun Hagino oldfqdn++; 1332686cdd19SJun-ichiro itojun Hagino break; 1333686cdd19SJun-ichiro itojun Hagino } 133433841545SHajimu UMEMOTO #if ICMP6_NI_SUBJ_IPV6 != 0 133533841545SHajimu UMEMOTO if (ni6->ni_code != ICMP6_NI_SUBJ_IPV6) 133633841545SHajimu UMEMOTO goto bad; 133733841545SHajimu UMEMOTO #endif 1338686cdd19SJun-ichiro itojun Hagino 13392a5aafceSHajimu UMEMOTO if (subjlen != sizeof(struct in6_addr)) 1340686cdd19SJun-ichiro itojun Hagino goto bad; 1341686cdd19SJun-ichiro itojun Hagino 1342686cdd19SJun-ichiro itojun Hagino /* 1343686cdd19SJun-ichiro itojun Hagino * Validate Subject address. 1344686cdd19SJun-ichiro itojun Hagino * 134533841545SHajimu UMEMOTO * Not sure what exactly "address belongs to the node" 134633841545SHajimu UMEMOTO * means in the spec, is it just unicast, or what? 1347686cdd19SJun-ichiro itojun Hagino * 1348686cdd19SJun-ichiro itojun Hagino * At this moment we consider Subject address as 1349686cdd19SJun-ichiro itojun Hagino * "belong to the node" if the Subject address equals 1350686cdd19SJun-ichiro itojun Hagino * to the IPv6 destination address; validation for 1351686cdd19SJun-ichiro itojun Hagino * IPv6 destination address should have done enough 1352686cdd19SJun-ichiro itojun Hagino * check for us. 1353686cdd19SJun-ichiro itojun Hagino * 1354686cdd19SJun-ichiro itojun Hagino * We do not do proxy at this moment. 1355686cdd19SJun-ichiro itojun Hagino */ 1356686cdd19SJun-ichiro itojun Hagino /* m_pulldown instead of copy? */ 1357686cdd19SJun-ichiro itojun Hagino m_copydata(m, off + sizeof(struct icmp6_nodeinfo), 1358a1f7e5f8SHajimu UMEMOTO subjlen, (caddr_t)&in6_subj); 1359a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&in6_subj, m->m_pkthdr.rcvif, NULL)) 13609a4f9608SHajimu UMEMOTO goto bad; 13612a5aafceSHajimu UMEMOTO 1362a1f7e5f8SHajimu UMEMOTO subj = (char *)&in6_subj; 1363a1f7e5f8SHajimu UMEMOTO if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &in6_subj)) 1364686cdd19SJun-ichiro itojun Hagino break; 136533841545SHajimu UMEMOTO 1366686cdd19SJun-ichiro itojun Hagino /* 1367686cdd19SJun-ichiro itojun Hagino * XXX if we are to allow other cases, we should really 1368686cdd19SJun-ichiro itojun Hagino * be careful about scope here. 1369686cdd19SJun-ichiro itojun Hagino * basically, we should disallow queries toward IPv6 137006cd0a3fSHajimu UMEMOTO * destination X with subject Y, 137106cd0a3fSHajimu UMEMOTO * if scope(X) > scope(Y). 1372686cdd19SJun-ichiro itojun Hagino * if we allow scope(X) > scope(Y), it will result in 1373686cdd19SJun-ichiro itojun Hagino * information leakage across scope boundary. 1374686cdd19SJun-ichiro itojun Hagino */ 1375686cdd19SJun-ichiro itojun Hagino goto bad; 1376686cdd19SJun-ichiro itojun Hagino 1377686cdd19SJun-ichiro itojun Hagino case ICMP6_NI_SUBJ_FQDN: 1378686cdd19SJun-ichiro itojun Hagino /* 1379686cdd19SJun-ichiro itojun Hagino * Validate Subject name with gethostname(3). 1380686cdd19SJun-ichiro itojun Hagino * 1381686cdd19SJun-ichiro itojun Hagino * The behavior may need some debate, since: 1382686cdd19SJun-ichiro itojun Hagino * - we are not sure if the node has FQDN as 1383686cdd19SJun-ichiro itojun Hagino * hostname (returned by gethostname(3)). 1384686cdd19SJun-ichiro itojun Hagino * - the code does wildcard match for truncated names. 1385686cdd19SJun-ichiro itojun Hagino * however, we are not sure if we want to perform 1386686cdd19SJun-ichiro itojun Hagino * wildcard match, if gethostname(3) side has 1387686cdd19SJun-ichiro itojun Hagino * truncated hostname. 1388686cdd19SJun-ichiro itojun Hagino */ 138976ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 139076ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 1391c1f19219SJamie Gritton n = ni6_nametodns(pr->pr_hostname, 1392c1f19219SJamie Gritton strlen(pr->pr_hostname), 0); 139376ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 1394686cdd19SJun-ichiro itojun Hagino if (!n || n->m_next || n->m_len == 0) 1395686cdd19SJun-ichiro itojun Hagino goto bad; 1396686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(subj, char *, m, 1397686cdd19SJun-ichiro itojun Hagino off + sizeof(struct icmp6_nodeinfo), subjlen); 1398686cdd19SJun-ichiro itojun Hagino if (subj == NULL) 1399686cdd19SJun-ichiro itojun Hagino goto bad; 1400686cdd19SJun-ichiro itojun Hagino if (!ni6_dnsmatch(subj, subjlen, mtod(n, const char *), 1401686cdd19SJun-ichiro itojun Hagino n->m_len)) { 1402686cdd19SJun-ichiro itojun Hagino goto bad; 1403686cdd19SJun-ichiro itojun Hagino } 1404686cdd19SJun-ichiro itojun Hagino m_freem(n); 1405686cdd19SJun-ichiro itojun Hagino n = NULL; 1406686cdd19SJun-ichiro itojun Hagino break; 1407686cdd19SJun-ichiro itojun Hagino 140833841545SHajimu UMEMOTO case ICMP6_NI_SUBJ_IPV4: /* XXX: to be implemented? */ 1409686cdd19SJun-ichiro itojun Hagino default: 1410686cdd19SJun-ichiro itojun Hagino goto bad; 1411686cdd19SJun-ichiro itojun Hagino } 1412686cdd19SJun-ichiro itojun Hagino break; 1413686cdd19SJun-ichiro itojun Hagino } 1414686cdd19SJun-ichiro itojun Hagino 141533841545SHajimu UMEMOTO /* refuse based on configuration. XXX ICMP6_NI_REFUSED? */ 141633841545SHajimu UMEMOTO switch (qtype) { 141733841545SHajimu UMEMOTO case NI_QTYPE_FQDN: 1418603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_FQDNOK) == 0) 141933841545SHajimu UMEMOTO goto bad; 142033841545SHajimu UMEMOTO break; 142133841545SHajimu UMEMOTO case NI_QTYPE_NODEADDR: 1422a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1423603724d3SBjoern A. Zeeb if ((V_icmp6_nodeinfo & ICMP6_NODEINFO_NODEADDROK) == 0) 142433841545SHajimu UMEMOTO goto bad; 142533841545SHajimu UMEMOTO break; 142633841545SHajimu UMEMOTO } 142733841545SHajimu UMEMOTO 142833841545SHajimu UMEMOTO /* guess reply length */ 142933841545SHajimu UMEMOTO switch (qtype) { 143033841545SHajimu UMEMOTO case NI_QTYPE_NOOP: 143133841545SHajimu UMEMOTO break; /* no reply data */ 143233841545SHajimu UMEMOTO case NI_QTYPE_SUPTYPES: 143333841545SHajimu UMEMOTO replylen += sizeof(u_int32_t); 143433841545SHajimu UMEMOTO break; 143533841545SHajimu UMEMOTO case NI_QTYPE_FQDN: 143633841545SHajimu UMEMOTO /* XXX will append an mbuf */ 143733841545SHajimu UMEMOTO replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen); 143833841545SHajimu UMEMOTO break; 143933841545SHajimu UMEMOTO case NI_QTYPE_NODEADDR: 1440c66b5feaSHajimu UMEMOTO addrs = ni6_addrs(ni6, m, &ifp, (struct in6_addr *)subj); 144133841545SHajimu UMEMOTO if ((replylen += addrs * (sizeof(struct in6_addr) + 144233841545SHajimu UMEMOTO sizeof(u_int32_t))) > MCLBYTES) 144333841545SHajimu UMEMOTO replylen = MCLBYTES; /* XXX: will truncate pkt later */ 144433841545SHajimu UMEMOTO break; 1445a22adbc6SSUZUKI Shinsuke case NI_QTYPE_IPV4ADDR: 1446a22adbc6SSUZUKI Shinsuke /* unsupported - should respond with unknown Qtype? */ 1447a22adbc6SSUZUKI Shinsuke break; 144833841545SHajimu UMEMOTO default: 144933841545SHajimu UMEMOTO /* 145033841545SHajimu UMEMOTO * XXX: We must return a reply with the ICMP6 code 145133841545SHajimu UMEMOTO * `unknown Qtype' in this case. However we regard the case 145233841545SHajimu UMEMOTO * as an FQDN query for backward compatibility. 145333841545SHajimu UMEMOTO * Older versions set a random value to this field, 145433841545SHajimu UMEMOTO * so it rarely varies in the defined qtypes. 145533841545SHajimu UMEMOTO * But the mechanism is not reliable... 145633841545SHajimu UMEMOTO * maybe we should obsolete older versions. 145733841545SHajimu UMEMOTO */ 145833841545SHajimu UMEMOTO qtype = NI_QTYPE_FQDN; 145933841545SHajimu UMEMOTO /* XXX will append an mbuf */ 146033841545SHajimu UMEMOTO replylen += offsetof(struct ni_reply_fqdn, ni_fqdn_namelen); 146133841545SHajimu UMEMOTO oldfqdn++; 146233841545SHajimu UMEMOTO break; 146333841545SHajimu UMEMOTO } 146433841545SHajimu UMEMOTO 146510e5acc3SGleb Smirnoff /* Allocate an mbuf to reply. */ 1466686cdd19SJun-ichiro itojun Hagino if (replylen > MCLBYTES) { 146782cd038dSYoshinobu Inoue /* 146833841545SHajimu UMEMOTO * XXX: should we try to allocate more? But MCLBYTES 146933841545SHajimu UMEMOTO * is probably much larger than IPV6_MMTU... 147082cd038dSYoshinobu Inoue */ 147182cd038dSYoshinobu Inoue goto bad; 1472686cdd19SJun-ichiro itojun Hagino } 147310e5acc3SGleb Smirnoff if (replylen > MHLEN) 147410e5acc3SGleb Smirnoff n = m_getcl(M_NOWAIT, m->m_type, M_PKTHDR); 147510e5acc3SGleb Smirnoff else 147610e5acc3SGleb Smirnoff n = m_gethdr(M_NOWAIT, m->m_type); 147710e5acc3SGleb Smirnoff if (n == NULL) { 147810e5acc3SGleb Smirnoff m_freem(m); 147910e5acc3SGleb Smirnoff return (NULL); 148082cd038dSYoshinobu Inoue } 148110e5acc3SGleb Smirnoff m_move_pkthdr(n, m); /* just for recvif and FIB */ 148282cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = replylen; 148382cd038dSYoshinobu Inoue 148482cd038dSYoshinobu Inoue /* copy mbuf header and IPv6 + Node Information base headers */ 148582cd038dSYoshinobu Inoue bcopy(mtod(m, caddr_t), mtod(n, caddr_t), sizeof(struct ip6_hdr)); 148682cd038dSYoshinobu Inoue nni6 = (struct icmp6_nodeinfo *)(mtod(n, struct ip6_hdr *) + 1); 1487686cdd19SJun-ichiro itojun Hagino bcopy((caddr_t)ni6, (caddr_t)nni6, sizeof(struct icmp6_nodeinfo)); 148882cd038dSYoshinobu Inoue 148982cd038dSYoshinobu Inoue /* qtype dependent procedure */ 149082cd038dSYoshinobu Inoue switch (qtype) { 149182cd038dSYoshinobu Inoue case NI_QTYPE_NOOP: 149233841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 149382cd038dSYoshinobu Inoue nni6->ni_flags = 0; 149482cd038dSYoshinobu Inoue break; 149582cd038dSYoshinobu Inoue case NI_QTYPE_SUPTYPES: 149633841545SHajimu UMEMOTO { 149733841545SHajimu UMEMOTO u_int32_t v; 149833841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 149933841545SHajimu UMEMOTO nni6->ni_flags = htons(0x0000); /* raw bitmap */ 150033841545SHajimu UMEMOTO /* supports NOOP, SUPTYPES, FQDN, and NODEADDR */ 150133841545SHajimu UMEMOTO v = (u_int32_t)htonl(0x0000000f); 150233841545SHajimu UMEMOTO bcopy(&v, nni6 + 1, sizeof(u_int32_t)); 150382cd038dSYoshinobu Inoue break; 150433841545SHajimu UMEMOTO } 150582cd038dSYoshinobu Inoue case NI_QTYPE_FQDN: 150633841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 150782cd038dSYoshinobu Inoue fqdn = (struct ni_reply_fqdn *)(mtod(n, caddr_t) + 150806cd0a3fSHajimu UMEMOTO sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo)); 150982cd038dSYoshinobu Inoue nni6->ni_flags = 0; /* XXX: meaningless TTL */ 151082cd038dSYoshinobu Inoue fqdn->ni_fqdn_ttl = 0; /* ditto. */ 1511686cdd19SJun-ichiro itojun Hagino /* 151276ca6f88SJamie Gritton * XXX do we really have FQDN in hostname? 1513686cdd19SJun-ichiro itojun Hagino */ 151476ca6f88SJamie Gritton pr = curthread->td_ucred->cr_prison; 151576ca6f88SJamie Gritton mtx_lock(&pr->pr_mtx); 1516c1f19219SJamie Gritton n->m_next = ni6_nametodns(pr->pr_hostname, 1517c1f19219SJamie Gritton strlen(pr->pr_hostname), oldfqdn); 151876ca6f88SJamie Gritton mtx_unlock(&pr->pr_mtx); 1519686cdd19SJun-ichiro itojun Hagino if (n->m_next == NULL) 1520686cdd19SJun-ichiro itojun Hagino goto bad; 1521686cdd19SJun-ichiro itojun Hagino /* XXX we assume that n->m_next is not a chain */ 1522686cdd19SJun-ichiro itojun Hagino if (n->m_next->m_next != NULL) 1523686cdd19SJun-ichiro itojun Hagino goto bad; 1524686cdd19SJun-ichiro itojun Hagino n->m_pkthdr.len += n->m_next->m_len; 152582cd038dSYoshinobu Inoue break; 152682cd038dSYoshinobu Inoue case NI_QTYPE_NODEADDR: 152782cd038dSYoshinobu Inoue { 152882cd038dSYoshinobu Inoue int lenlim, copied; 152982cd038dSYoshinobu Inoue 153033841545SHajimu UMEMOTO nni6->ni_code = ICMP6_NI_SUCCESS; 153133841545SHajimu UMEMOTO n->m_pkthdr.len = n->m_len = 153233841545SHajimu UMEMOTO sizeof(struct ip6_hdr) + sizeof(struct icmp6_nodeinfo); 153333841545SHajimu UMEMOTO lenlim = M_TRAILINGSPACE(n); 153482cd038dSYoshinobu Inoue copied = ni6_store_addrs(ni6, nni6, ifp, lenlim); 153582cd038dSYoshinobu Inoue /* XXX: reset mbuf length */ 153682cd038dSYoshinobu Inoue n->m_pkthdr.len = n->m_len = sizeof(struct ip6_hdr) + 153782cd038dSYoshinobu Inoue sizeof(struct icmp6_nodeinfo) + copied; 153882cd038dSYoshinobu Inoue break; 153982cd038dSYoshinobu Inoue } 154082cd038dSYoshinobu Inoue default: 154182cd038dSYoshinobu Inoue break; /* XXX impossible! */ 154282cd038dSYoshinobu Inoue } 154382cd038dSYoshinobu Inoue 154482cd038dSYoshinobu Inoue nni6->ni_type = ICMP6_NI_REPLY; 1545686cdd19SJun-ichiro itojun Hagino m_freem(m); 154682cd038dSYoshinobu Inoue return (n); 154782cd038dSYoshinobu Inoue 154882cd038dSYoshinobu Inoue bad: 1549686cdd19SJun-ichiro itojun Hagino m_freem(m); 155082cd038dSYoshinobu Inoue if (n) 155182cd038dSYoshinobu Inoue m_freem(n); 155282cd038dSYoshinobu Inoue return (NULL); 155382cd038dSYoshinobu Inoue } 155482cd038dSYoshinobu Inoue 155582cd038dSYoshinobu Inoue /* 1556686cdd19SJun-ichiro itojun Hagino * make a mbuf with DNS-encoded string. no compression support. 1557686cdd19SJun-ichiro itojun Hagino * 1558686cdd19SJun-ichiro itojun Hagino * XXX names with less than 2 dots (like "foo" or "foo.section") will be 1559686cdd19SJun-ichiro itojun Hagino * treated as truncated name (two \0 at the end). this is a wild guess. 15601272577eSXin LI * 15611272577eSXin LI * old - return pascal string if non-zero 1562686cdd19SJun-ichiro itojun Hagino */ 1563686cdd19SJun-ichiro itojun Hagino static struct mbuf * 15641272577eSXin LI ni6_nametodns(const char *name, int namelen, int old) 1565686cdd19SJun-ichiro itojun Hagino { 1566686cdd19SJun-ichiro itojun Hagino struct mbuf *m; 1567686cdd19SJun-ichiro itojun Hagino char *cp, *ep; 1568686cdd19SJun-ichiro itojun Hagino const char *p, *q; 1569686cdd19SJun-ichiro itojun Hagino int i, len, nterm; 1570686cdd19SJun-ichiro itojun Hagino 1571686cdd19SJun-ichiro itojun Hagino if (old) 1572686cdd19SJun-ichiro itojun Hagino len = namelen + 1; 1573686cdd19SJun-ichiro itojun Hagino else 1574686cdd19SJun-ichiro itojun Hagino len = MCLBYTES; 1575686cdd19SJun-ichiro itojun Hagino 15767b07d1beSGleb Smirnoff /* Because MAXHOSTNAMELEN is usually 256, we use cluster mbuf. */ 15777b07d1beSGleb Smirnoff if (len > MLEN) 15787b07d1beSGleb Smirnoff m = m_getcl(M_NOWAIT, MT_DATA, 0); 15797b07d1beSGleb Smirnoff else 15807b07d1beSGleb Smirnoff m = m_get(M_NOWAIT, MT_DATA); 15817b07d1beSGleb Smirnoff if (m == NULL) 1582686cdd19SJun-ichiro itojun Hagino goto fail; 1583686cdd19SJun-ichiro itojun Hagino 1584686cdd19SJun-ichiro itojun Hagino if (old) { 1585686cdd19SJun-ichiro itojun Hagino m->m_len = len; 1586686cdd19SJun-ichiro itojun Hagino *mtod(m, char *) = namelen; 1587686cdd19SJun-ichiro itojun Hagino bcopy(name, mtod(m, char *) + 1, namelen); 1588686cdd19SJun-ichiro itojun Hagino return m; 1589686cdd19SJun-ichiro itojun Hagino } else { 1590686cdd19SJun-ichiro itojun Hagino m->m_len = 0; 1591686cdd19SJun-ichiro itojun Hagino cp = mtod(m, char *); 1592686cdd19SJun-ichiro itojun Hagino ep = mtod(m, char *) + M_TRAILINGSPACE(m); 1593686cdd19SJun-ichiro itojun Hagino 1594686cdd19SJun-ichiro itojun Hagino /* if not certain about my name, return empty buffer */ 1595686cdd19SJun-ichiro itojun Hagino if (namelen == 0) 1596686cdd19SJun-ichiro itojun Hagino return m; 1597686cdd19SJun-ichiro itojun Hagino 1598686cdd19SJun-ichiro itojun Hagino /* 1599686cdd19SJun-ichiro itojun Hagino * guess if it looks like shortened hostname, or FQDN. 1600686cdd19SJun-ichiro itojun Hagino * shortened hostname needs two trailing "\0". 1601686cdd19SJun-ichiro itojun Hagino */ 1602686cdd19SJun-ichiro itojun Hagino i = 0; 1603686cdd19SJun-ichiro itojun Hagino for (p = name; p < name + namelen; p++) { 1604686cdd19SJun-ichiro itojun Hagino if (*p && *p == '.') 1605686cdd19SJun-ichiro itojun Hagino i++; 1606686cdd19SJun-ichiro itojun Hagino } 1607686cdd19SJun-ichiro itojun Hagino if (i < 2) 1608686cdd19SJun-ichiro itojun Hagino nterm = 2; 1609686cdd19SJun-ichiro itojun Hagino else 1610686cdd19SJun-ichiro itojun Hagino nterm = 1; 1611686cdd19SJun-ichiro itojun Hagino 1612686cdd19SJun-ichiro itojun Hagino p = name; 1613686cdd19SJun-ichiro itojun Hagino while (cp < ep && p < name + namelen) { 1614686cdd19SJun-ichiro itojun Hagino i = 0; 1615686cdd19SJun-ichiro itojun Hagino for (q = p; q < name + namelen && *q && *q != '.'; q++) 1616686cdd19SJun-ichiro itojun Hagino i++; 1617686cdd19SJun-ichiro itojun Hagino /* result does not fit into mbuf */ 1618686cdd19SJun-ichiro itojun Hagino if (cp + i + 1 >= ep) 1619686cdd19SJun-ichiro itojun Hagino goto fail; 1620610be6ceSHajimu UMEMOTO /* 1621610be6ceSHajimu UMEMOTO * DNS label length restriction, RFC1035 page 8. 1622610be6ceSHajimu UMEMOTO * "i == 0" case is included here to avoid returning 1623610be6ceSHajimu UMEMOTO * 0-length label on "foo..bar". 1624610be6ceSHajimu UMEMOTO */ 1625610be6ceSHajimu UMEMOTO if (i <= 0 || i >= 64) 1626686cdd19SJun-ichiro itojun Hagino goto fail; 1627686cdd19SJun-ichiro itojun Hagino *cp++ = i; 1628686cdd19SJun-ichiro itojun Hagino bcopy(p, cp, i); 1629686cdd19SJun-ichiro itojun Hagino cp += i; 1630686cdd19SJun-ichiro itojun Hagino p = q; 1631686cdd19SJun-ichiro itojun Hagino if (p < name + namelen && *p == '.') 1632686cdd19SJun-ichiro itojun Hagino p++; 1633686cdd19SJun-ichiro itojun Hagino } 1634686cdd19SJun-ichiro itojun Hagino /* termination */ 1635686cdd19SJun-ichiro itojun Hagino if (cp + nterm >= ep) 1636686cdd19SJun-ichiro itojun Hagino goto fail; 1637686cdd19SJun-ichiro itojun Hagino while (nterm-- > 0) 1638686cdd19SJun-ichiro itojun Hagino *cp++ = '\0'; 1639686cdd19SJun-ichiro itojun Hagino m->m_len = cp - mtod(m, char *); 1640686cdd19SJun-ichiro itojun Hagino return m; 1641686cdd19SJun-ichiro itojun Hagino } 1642686cdd19SJun-ichiro itojun Hagino 1643686cdd19SJun-ichiro itojun Hagino panic("should not reach here"); 1644686cdd19SJun-ichiro itojun Hagino /* NOTREACHED */ 1645686cdd19SJun-ichiro itojun Hagino 1646686cdd19SJun-ichiro itojun Hagino fail: 1647686cdd19SJun-ichiro itojun Hagino if (m) 1648686cdd19SJun-ichiro itojun Hagino m_freem(m); 1649686cdd19SJun-ichiro itojun Hagino return NULL; 1650686cdd19SJun-ichiro itojun Hagino } 1651686cdd19SJun-ichiro itojun Hagino 1652686cdd19SJun-ichiro itojun Hagino /* 1653686cdd19SJun-ichiro itojun Hagino * check if two DNS-encoded string matches. takes care of truncated 1654686cdd19SJun-ichiro itojun Hagino * form (with \0\0 at the end). no compression support. 165533841545SHajimu UMEMOTO * XXX upper/lowercase match (see RFC2065) 1656686cdd19SJun-ichiro itojun Hagino */ 1657686cdd19SJun-ichiro itojun Hagino static int 16581272577eSXin LI ni6_dnsmatch(const char *a, int alen, const char *b, int blen) 1659686cdd19SJun-ichiro itojun Hagino { 1660686cdd19SJun-ichiro itojun Hagino const char *a0, *b0; 1661686cdd19SJun-ichiro itojun Hagino int l; 1662686cdd19SJun-ichiro itojun Hagino 1663686cdd19SJun-ichiro itojun Hagino /* simplest case - need validation? */ 1664686cdd19SJun-ichiro itojun Hagino if (alen == blen && bcmp(a, b, alen) == 0) 1665686cdd19SJun-ichiro itojun Hagino return 1; 1666686cdd19SJun-ichiro itojun Hagino 1667686cdd19SJun-ichiro itojun Hagino a0 = a; 1668686cdd19SJun-ichiro itojun Hagino b0 = b; 1669686cdd19SJun-ichiro itojun Hagino 1670686cdd19SJun-ichiro itojun Hagino /* termination is mandatory */ 1671686cdd19SJun-ichiro itojun Hagino if (alen < 2 || blen < 2) 1672686cdd19SJun-ichiro itojun Hagino return 0; 1673686cdd19SJun-ichiro itojun Hagino if (a0[alen - 1] != '\0' || b0[blen - 1] != '\0') 1674686cdd19SJun-ichiro itojun Hagino return 0; 1675686cdd19SJun-ichiro itojun Hagino alen--; 1676686cdd19SJun-ichiro itojun Hagino blen--; 1677686cdd19SJun-ichiro itojun Hagino 1678686cdd19SJun-ichiro itojun Hagino while (a - a0 < alen && b - b0 < blen) { 1679686cdd19SJun-ichiro itojun Hagino if (a - a0 + 1 > alen || b - b0 + 1 > blen) 1680686cdd19SJun-ichiro itojun Hagino return 0; 1681686cdd19SJun-ichiro itojun Hagino 1682686cdd19SJun-ichiro itojun Hagino if ((signed char)a[0] < 0 || (signed char)b[0] < 0) 1683686cdd19SJun-ichiro itojun Hagino return 0; 1684686cdd19SJun-ichiro itojun Hagino /* we don't support compression yet */ 1685686cdd19SJun-ichiro itojun Hagino if (a[0] >= 64 || b[0] >= 64) 1686686cdd19SJun-ichiro itojun Hagino return 0; 1687686cdd19SJun-ichiro itojun Hagino 1688686cdd19SJun-ichiro itojun Hagino /* truncated case */ 1689686cdd19SJun-ichiro itojun Hagino if (a[0] == 0 && a - a0 == alen - 1) 1690686cdd19SJun-ichiro itojun Hagino return 1; 1691686cdd19SJun-ichiro itojun Hagino if (b[0] == 0 && b - b0 == blen - 1) 1692686cdd19SJun-ichiro itojun Hagino return 1; 1693686cdd19SJun-ichiro itojun Hagino if (a[0] == 0 || b[0] == 0) 1694686cdd19SJun-ichiro itojun Hagino return 0; 1695686cdd19SJun-ichiro itojun Hagino 1696686cdd19SJun-ichiro itojun Hagino if (a[0] != b[0]) 1697686cdd19SJun-ichiro itojun Hagino return 0; 1698686cdd19SJun-ichiro itojun Hagino l = a[0]; 1699686cdd19SJun-ichiro itojun Hagino if (a - a0 + 1 + l > alen || b - b0 + 1 + l > blen) 1700686cdd19SJun-ichiro itojun Hagino return 0; 1701686cdd19SJun-ichiro itojun Hagino if (bcmp(a + 1, b + 1, l) != 0) 1702686cdd19SJun-ichiro itojun Hagino return 0; 1703686cdd19SJun-ichiro itojun Hagino 1704686cdd19SJun-ichiro itojun Hagino a += 1 + l; 1705686cdd19SJun-ichiro itojun Hagino b += 1 + l; 1706686cdd19SJun-ichiro itojun Hagino } 1707686cdd19SJun-ichiro itojun Hagino 1708686cdd19SJun-ichiro itojun Hagino if (a - a0 == alen && b - b0 == blen) 1709686cdd19SJun-ichiro itojun Hagino return 1; 1710686cdd19SJun-ichiro itojun Hagino else 1711686cdd19SJun-ichiro itojun Hagino return 0; 1712686cdd19SJun-ichiro itojun Hagino } 1713686cdd19SJun-ichiro itojun Hagino 1714686cdd19SJun-ichiro itojun Hagino /* 171582cd038dSYoshinobu Inoue * calculate the number of addresses to be returned in the node info reply. 171682cd038dSYoshinobu Inoue */ 171782cd038dSYoshinobu Inoue static int 17181272577eSXin LI ni6_addrs(struct icmp6_nodeinfo *ni6, struct mbuf *m, struct ifnet **ifpp, 17191272577eSXin LI struct in6_addr *subj) 172082cd038dSYoshinobu Inoue { 172133841545SHajimu UMEMOTO struct ifnet *ifp; 172233841545SHajimu UMEMOTO struct in6_ifaddr *ifa6; 172333841545SHajimu UMEMOTO struct ifaddr *ifa; 172482cd038dSYoshinobu Inoue int addrs = 0, addrsofif, iffound = 0; 172533841545SHajimu UMEMOTO int niflags = ni6->ni_flags; 172633841545SHajimu UMEMOTO 172733841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_ALL) == 0) { 172833841545SHajimu UMEMOTO switch (ni6->ni_code) { 172933841545SHajimu UMEMOTO case ICMP6_NI_SUBJ_IPV6: 173033841545SHajimu UMEMOTO if (subj == NULL) /* must be impossible... */ 173133841545SHajimu UMEMOTO return (0); 173233841545SHajimu UMEMOTO break; 173333841545SHajimu UMEMOTO default: 173433841545SHajimu UMEMOTO /* 173533841545SHajimu UMEMOTO * XXX: we only support IPv6 subject address for 173633841545SHajimu UMEMOTO * this Qtype. 173733841545SHajimu UMEMOTO */ 173833841545SHajimu UMEMOTO return (0); 173933841545SHajimu UMEMOTO } 174033841545SHajimu UMEMOTO } 174182cd038dSYoshinobu Inoue 174277dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 1743e6abaf91SGleb Smirnoff TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 174482cd038dSYoshinobu Inoue addrsofif = 0; 1745137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1746c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 174782cd038dSYoshinobu Inoue if (ifa->ifa_addr->sa_family != AF_INET6) 174882cd038dSYoshinobu Inoue continue; 174982cd038dSYoshinobu Inoue ifa6 = (struct in6_ifaddr *)ifa; 175082cd038dSYoshinobu Inoue 175133841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_ALL) == 0 && 1752c66b5feaSHajimu UMEMOTO IN6_ARE_ADDR_EQUAL(subj, &ifa6->ia_addr.sin6_addr)) 175382cd038dSYoshinobu Inoue iffound = 1; 175482cd038dSYoshinobu Inoue 1755686cdd19SJun-ichiro itojun Hagino /* 1756686cdd19SJun-ichiro itojun Hagino * IPv4-mapped addresses can only be returned by a 1757686cdd19SJun-ichiro itojun Hagino * Node Information proxy, since they represent 1758686cdd19SJun-ichiro itojun Hagino * addresses of IPv4-only nodes, which perforce do 1759686cdd19SJun-ichiro itojun Hagino * not implement this protocol. 176033841545SHajimu UMEMOTO * [icmp-name-lookups-07, Section 5.4] 1761686cdd19SJun-ichiro itojun Hagino * So we don't support NI_NODEADDR_FLAG_COMPAT in 1762686cdd19SJun-ichiro itojun Hagino * this function at this moment. 1763686cdd19SJun-ichiro itojun Hagino */ 1764686cdd19SJun-ichiro itojun Hagino 176582cd038dSYoshinobu Inoue /* What do we have to do about ::1? */ 176682cd038dSYoshinobu Inoue switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) { 176782cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_LINKLOCAL: 176833841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) 176933841545SHajimu UMEMOTO continue; 177082cd038dSYoshinobu Inoue break; 177182cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_SITELOCAL: 177233841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) 177333841545SHajimu UMEMOTO continue; 177482cd038dSYoshinobu Inoue break; 177582cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_GLOBAL: 177633841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) 177733841545SHajimu UMEMOTO continue; 177882cd038dSYoshinobu Inoue break; 177982cd038dSYoshinobu Inoue default: 178082cd038dSYoshinobu Inoue continue; 178182cd038dSYoshinobu Inoue } 178233841545SHajimu UMEMOTO 178333841545SHajimu UMEMOTO /* 178433841545SHajimu UMEMOTO * check if anycast is okay. 178533841545SHajimu UMEMOTO * XXX: just experimental. not in the spec. 178633841545SHajimu UMEMOTO */ 178733841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 && 178833841545SHajimu UMEMOTO (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) 178933841545SHajimu UMEMOTO continue; /* we need only unicast addresses */ 179033841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 1791603724d3SBjoern A. Zeeb (V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) { 179233841545SHajimu UMEMOTO continue; 179333841545SHajimu UMEMOTO } 179433841545SHajimu UMEMOTO addrsofif++; /* count the address */ 179582cd038dSYoshinobu Inoue } 1796137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 179782cd038dSYoshinobu Inoue if (iffound) { 179882cd038dSYoshinobu Inoue *ifpp = ifp; 179977dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 180082cd038dSYoshinobu Inoue return (addrsofif); 180182cd038dSYoshinobu Inoue } 180282cd038dSYoshinobu Inoue 180382cd038dSYoshinobu Inoue addrs += addrsofif; 180482cd038dSYoshinobu Inoue } 180577dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 180682cd038dSYoshinobu Inoue 180782cd038dSYoshinobu Inoue return (addrs); 180882cd038dSYoshinobu Inoue } 180982cd038dSYoshinobu Inoue 181082cd038dSYoshinobu Inoue static int 18111272577eSXin LI ni6_store_addrs(struct icmp6_nodeinfo *ni6, struct icmp6_nodeinfo *nni6, 18121272577eSXin LI struct ifnet *ifp0, int resid) 181382cd038dSYoshinobu Inoue { 181494e83133SJohn Baldwin struct ifnet *ifp; 181533841545SHajimu UMEMOTO struct in6_ifaddr *ifa6; 181633841545SHajimu UMEMOTO struct ifaddr *ifa; 181733841545SHajimu UMEMOTO struct ifnet *ifp_dep = NULL; 181833841545SHajimu UMEMOTO int copied = 0, allow_deprecated = 0; 181982cd038dSYoshinobu Inoue u_char *cp = (u_char *)(nni6 + 1); 182033841545SHajimu UMEMOTO int niflags = ni6->ni_flags; 182133841545SHajimu UMEMOTO u_int32_t ltime; 182282cd038dSYoshinobu Inoue 182333841545SHajimu UMEMOTO if (ifp0 == NULL && !(niflags & NI_NODEADDR_FLAG_ALL)) 182482cd038dSYoshinobu Inoue return (0); /* needless to copy */ 182582cd038dSYoshinobu Inoue 182677dfcdc4SRobert Watson IFNET_RLOCK_NOSLEEP(); 182794e83133SJohn Baldwin ifp = ifp0 ? ifp0 : TAILQ_FIRST(&V_ifnet); 182833841545SHajimu UMEMOTO again: 18290527d333SHajimu UMEMOTO 1830e6abaf91SGleb Smirnoff for (; ifp; ifp = TAILQ_NEXT(ifp, if_link)) { 1831137f91e8SJohn Baldwin IF_ADDR_RLOCK(ifp); 1832c4dd3fe1SRobert Watson TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 183382cd038dSYoshinobu Inoue if (ifa->ifa_addr->sa_family != AF_INET6) 183482cd038dSYoshinobu Inoue continue; 183582cd038dSYoshinobu Inoue ifa6 = (struct in6_ifaddr *)ifa; 183682cd038dSYoshinobu Inoue 183733841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) != 0 && 183833841545SHajimu UMEMOTO allow_deprecated == 0) { 183933841545SHajimu UMEMOTO /* 184033841545SHajimu UMEMOTO * prefererred address should be put before 184133841545SHajimu UMEMOTO * deprecated addresses. 184233841545SHajimu UMEMOTO */ 184333841545SHajimu UMEMOTO 184433841545SHajimu UMEMOTO /* record the interface for later search */ 184533841545SHajimu UMEMOTO if (ifp_dep == NULL) 184633841545SHajimu UMEMOTO ifp_dep = ifp; 184733841545SHajimu UMEMOTO 184882cd038dSYoshinobu Inoue continue; 184906cd0a3fSHajimu UMEMOTO } else if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) == 0 && 185033841545SHajimu UMEMOTO allow_deprecated != 0) 185133841545SHajimu UMEMOTO continue; /* we now collect deprecated addrs */ 185282cd038dSYoshinobu Inoue 185382cd038dSYoshinobu Inoue /* What do we have to do about ::1? */ 185482cd038dSYoshinobu Inoue switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) { 185582cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_LINKLOCAL: 185633841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) 185733841545SHajimu UMEMOTO continue; 185882cd038dSYoshinobu Inoue break; 185982cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_SITELOCAL: 186033841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) 186133841545SHajimu UMEMOTO continue; 186282cd038dSYoshinobu Inoue break; 186382cd038dSYoshinobu Inoue case IPV6_ADDR_SCOPE_GLOBAL: 186433841545SHajimu UMEMOTO if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) 186533841545SHajimu UMEMOTO continue; 186682cd038dSYoshinobu Inoue break; 186782cd038dSYoshinobu Inoue default: 186882cd038dSYoshinobu Inoue continue; 186982cd038dSYoshinobu Inoue } 187082cd038dSYoshinobu Inoue 187133841545SHajimu UMEMOTO /* 187233841545SHajimu UMEMOTO * check if anycast is okay. 187333841545SHajimu UMEMOTO * XXX: just experimental. not in the spec. 187433841545SHajimu UMEMOTO */ 187533841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 && 187633841545SHajimu UMEMOTO (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) 187733841545SHajimu UMEMOTO continue; 187833841545SHajimu UMEMOTO if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 && 1879603724d3SBjoern A. Zeeb (V_icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) { 188033841545SHajimu UMEMOTO continue; 188133841545SHajimu UMEMOTO } 188233841545SHajimu UMEMOTO 188333841545SHajimu UMEMOTO /* now we can copy the address */ 188433841545SHajimu UMEMOTO if (resid < sizeof(struct in6_addr) + 188533841545SHajimu UMEMOTO sizeof(u_int32_t)) { 1886137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 188782cd038dSYoshinobu Inoue /* 188882cd038dSYoshinobu Inoue * We give up much more copy. 188982cd038dSYoshinobu Inoue * Set the truncate flag and return. 189082cd038dSYoshinobu Inoue */ 189106cd0a3fSHajimu UMEMOTO nni6->ni_flags |= NI_NODEADDR_FLAG_TRUNCATE; 189277dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 189382cd038dSYoshinobu Inoue return (copied); 189482cd038dSYoshinobu Inoue } 189533841545SHajimu UMEMOTO 189633841545SHajimu UMEMOTO /* 189733841545SHajimu UMEMOTO * Set the TTL of the address. 189833841545SHajimu UMEMOTO * The TTL value should be one of the following 189933841545SHajimu UMEMOTO * according to the specification: 190033841545SHajimu UMEMOTO * 190133841545SHajimu UMEMOTO * 1. The remaining lifetime of a DHCP lease on the 190233841545SHajimu UMEMOTO * address, or 190333841545SHajimu UMEMOTO * 2. The remaining Valid Lifetime of a prefix from 190433841545SHajimu UMEMOTO * which the address was derived through Stateless 190533841545SHajimu UMEMOTO * Autoconfiguration. 190633841545SHajimu UMEMOTO * 190733841545SHajimu UMEMOTO * Note that we currently do not support stateful 190833841545SHajimu UMEMOTO * address configuration by DHCPv6, so the former 190933841545SHajimu UMEMOTO * case can't happen. 191033841545SHajimu UMEMOTO */ 191133841545SHajimu UMEMOTO if (ifa6->ia6_lifetime.ia6t_expire == 0) 191233841545SHajimu UMEMOTO ltime = ND6_INFINITE_LIFETIME; 191333841545SHajimu UMEMOTO else { 191433841545SHajimu UMEMOTO if (ifa6->ia6_lifetime.ia6t_expire > 19157d26db17SHiroki Sato time_uptime) 19167d26db17SHiroki Sato ltime = htonl(ifa6->ia6_lifetime.ia6t_expire - time_uptime); 191733841545SHajimu UMEMOTO else 191833841545SHajimu UMEMOTO ltime = 0; 191933841545SHajimu UMEMOTO } 192033841545SHajimu UMEMOTO 192133841545SHajimu UMEMOTO bcopy(<ime, cp, sizeof(u_int32_t)); 192233841545SHajimu UMEMOTO cp += sizeof(u_int32_t); 192333841545SHajimu UMEMOTO 192433841545SHajimu UMEMOTO /* copy the address itself */ 192582cd038dSYoshinobu Inoue bcopy(&ifa6->ia_addr.sin6_addr, cp, 192682cd038dSYoshinobu Inoue sizeof(struct in6_addr)); 19279a4f9608SHajimu UMEMOTO in6_clearscope((struct in6_addr *)cp); /* XXX */ 192882cd038dSYoshinobu Inoue cp += sizeof(struct in6_addr); 192933841545SHajimu UMEMOTO 193033841545SHajimu UMEMOTO resid -= (sizeof(struct in6_addr) + sizeof(u_int32_t)); 193106cd0a3fSHajimu UMEMOTO copied += (sizeof(struct in6_addr) + sizeof(u_int32_t)); 193282cd038dSYoshinobu Inoue } 1933137f91e8SJohn Baldwin IF_ADDR_RUNLOCK(ifp); 193482cd038dSYoshinobu Inoue if (ifp0) /* we need search only on the specified IF */ 193582cd038dSYoshinobu Inoue break; 193682cd038dSYoshinobu Inoue } 193782cd038dSYoshinobu Inoue 193833841545SHajimu UMEMOTO if (allow_deprecated == 0 && ifp_dep != NULL) { 193933841545SHajimu UMEMOTO ifp = ifp_dep; 194033841545SHajimu UMEMOTO allow_deprecated = 1; 194133841545SHajimu UMEMOTO 194233841545SHajimu UMEMOTO goto again; 194333841545SHajimu UMEMOTO } 194433841545SHajimu UMEMOTO 194577dfcdc4SRobert Watson IFNET_RUNLOCK_NOSLEEP(); 1946b30a244cSJeffrey Hsu 194782cd038dSYoshinobu Inoue return (copied); 194882cd038dSYoshinobu Inoue } 194982cd038dSYoshinobu Inoue 195082cd038dSYoshinobu Inoue /* 195182cd038dSYoshinobu Inoue * XXX almost dup'ed code with rip6_input. 195282cd038dSYoshinobu Inoue */ 195382cd038dSYoshinobu Inoue static int 19541272577eSXin LI icmp6_rip6_input(struct mbuf **mp, int off) 195582cd038dSYoshinobu Inoue { 195682cd038dSYoshinobu Inoue struct mbuf *m = *mp; 195733841545SHajimu UMEMOTO struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1958fc384fa5SBjoern A. Zeeb struct inpcb *in6p; 1959fc384fa5SBjoern A. Zeeb struct inpcb *last = NULL; 19609a4f9608SHajimu UMEMOTO struct sockaddr_in6 fromsa; 196182cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 196282cd038dSYoshinobu Inoue struct mbuf *opts = NULL; 196382cd038dSYoshinobu Inoue 1964686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 196582cd038dSYoshinobu Inoue /* this is assumed to be safe. */ 196682cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off); 1967686cdd19SJun-ichiro itojun Hagino #else 1968686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off, sizeof(*icmp6)); 1969686cdd19SJun-ichiro itojun Hagino if (icmp6 == NULL) { 1970686cdd19SJun-ichiro itojun Hagino /* m is already reclaimed */ 197106cd0a3fSHajimu UMEMOTO return (IPPROTO_DONE); 1972686cdd19SJun-ichiro itojun Hagino } 1973686cdd19SJun-ichiro itojun Hagino #endif 197482cd038dSYoshinobu Inoue 1975a1f7e5f8SHajimu UMEMOTO /* 1976a1f7e5f8SHajimu UMEMOTO * XXX: the address may have embedded scope zone ID, which should be 1977a1f7e5f8SHajimu UMEMOTO * hidden from applications. 1978a1f7e5f8SHajimu UMEMOTO */ 19799a4f9608SHajimu UMEMOTO bzero(&fromsa, sizeof(fromsa)); 19809a4f9608SHajimu UMEMOTO fromsa.sin6_family = AF_INET6; 1981a1f7e5f8SHajimu UMEMOTO fromsa.sin6_len = sizeof(struct sockaddr_in6); 1982a1f7e5f8SHajimu UMEMOTO fromsa.sin6_addr = ip6->ip6_src; 1983a1f7e5f8SHajimu UMEMOTO if (sa6_recoverscope(&fromsa)) { 1984a1f7e5f8SHajimu UMEMOTO m_freem(m); 1985a1f7e5f8SHajimu UMEMOTO return (IPPROTO_DONE); 1986a1f7e5f8SHajimu UMEMOTO } 198782cd038dSYoshinobu Inoue 1988603724d3SBjoern A. Zeeb INP_INFO_RLOCK(&V_ripcbinfo); 1989603724d3SBjoern A. Zeeb LIST_FOREACH(in6p, &V_ripcb, inp_list) { 1990b11e21aeSAlexander Motin if ((in6p->inp_vflag & INP_IPV6) == 0) 199182cd038dSYoshinobu Inoue continue; 1992fc384fa5SBjoern A. Zeeb if (in6p->inp_ip_p != IPPROTO_ICMPV6) 1993b11e21aeSAlexander Motin continue; 199482cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 199582cd038dSYoshinobu Inoue !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 1996b11e21aeSAlexander Motin continue; 199782cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 199882cd038dSYoshinobu Inoue !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 1999b11e21aeSAlexander Motin continue; 20006c5bbf5cSAlexander Motin INP_RLOCK(in6p); 20012f1ff0cdSRobert Watson if (ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type, 20026c5bbf5cSAlexander Motin in6p->in6p_icmp6filt)) { 20036c5bbf5cSAlexander Motin INP_RUNLOCK(in6p); 2004b11e21aeSAlexander Motin continue; 20056c5bbf5cSAlexander Motin } 2006aba53ef0SKip Macy if (last != NULL) { 2007657db3c8SHajimu UMEMOTO struct mbuf *n = NULL; 2008657db3c8SHajimu UMEMOTO 2009657db3c8SHajimu UMEMOTO /* 2010657db3c8SHajimu UMEMOTO * Recent network drivers tend to allocate a single 2011657db3c8SHajimu UMEMOTO * mbuf cluster, rather than to make a couple of 2012657db3c8SHajimu UMEMOTO * mbufs without clusters. Also, since the IPv6 code 2013657db3c8SHajimu UMEMOTO * path tries to avoid m_pullup(), it is highly 2014657db3c8SHajimu UMEMOTO * probable that we still have an mbuf cluster here 2015657db3c8SHajimu UMEMOTO * even though the necessary length can be stored in an 2016657db3c8SHajimu UMEMOTO * mbuf's internal buffer. 2017657db3c8SHajimu UMEMOTO * Meanwhile, the default size of the receive socket 2018657db3c8SHajimu UMEMOTO * buffer for raw sockets is not so large. This means 2019657db3c8SHajimu UMEMOTO * the possibility of packet loss is relatively higher 2020657db3c8SHajimu UMEMOTO * than before. To avoid this scenario, we copy the 2021657db3c8SHajimu UMEMOTO * received data to a separate mbuf that does not use 2022657db3c8SHajimu UMEMOTO * a cluster, if possible. 2023657db3c8SHajimu UMEMOTO * XXX: it is better to copy the data after stripping 2024657db3c8SHajimu UMEMOTO * intermediate headers. 2025657db3c8SHajimu UMEMOTO */ 2026657db3c8SHajimu UMEMOTO if ((m->m_flags & M_EXT) && m->m_next == NULL && 2027657db3c8SHajimu UMEMOTO m->m_len <= MHLEN) { 20287b07d1beSGleb Smirnoff n = m_get(M_NOWAIT, m->m_type); 2029657db3c8SHajimu UMEMOTO if (n != NULL) { 2030c543ec4eSGeorge V. Neville-Neil if (m_dup_pkthdr(n, m, M_NOWAIT)) { 2031c543ec4eSGeorge V. Neville-Neil bcopy(m->m_data, n->m_data, 2032c543ec4eSGeorge V. Neville-Neil m->m_len); 2033657db3c8SHajimu UMEMOTO n->m_len = m->m_len; 2034c543ec4eSGeorge V. Neville-Neil } else { 2035c543ec4eSGeorge V. Neville-Neil m_free(n); 2036c543ec4eSGeorge V. Neville-Neil n = NULL; 2037c543ec4eSGeorge V. Neville-Neil } 2038657db3c8SHajimu UMEMOTO } 2039657db3c8SHajimu UMEMOTO } 2040657db3c8SHajimu UMEMOTO if (n != NULL || 2041657db3c8SHajimu UMEMOTO (n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 204297590249SBjoern A. Zeeb if (last->inp_flags & INP_CONTROLOPTS) 204311de19f4SHajimu UMEMOTO ip6_savecontrol(last, n, &opts); 204482cd038dSYoshinobu Inoue /* strip intermediate headers */ 204582cd038dSYoshinobu Inoue m_adj(n, off); 2046fc384fa5SBjoern A. Zeeb SOCKBUF_LOCK(&last->inp_socket->so_rcv); 2047c9db0fadSRobert Watson if (sbappendaddr_locked( 2048fc384fa5SBjoern A. Zeeb &last->inp_socket->so_rcv, 20499a4f9608SHajimu UMEMOTO (struct sockaddr *)&fromsa, n, opts) 205006cd0a3fSHajimu UMEMOTO == 0) { 205182cd038dSYoshinobu Inoue /* should notify about lost packet */ 205282cd038dSYoshinobu Inoue m_freem(n); 205333841545SHajimu UMEMOTO if (opts) { 205482cd038dSYoshinobu Inoue m_freem(opts); 205533841545SHajimu UMEMOTO } 2056c9db0fadSRobert Watson SOCKBUF_UNLOCK( 2057fc384fa5SBjoern A. Zeeb &last->inp_socket->so_rcv); 20584cc20ab1SSeigo Tanimura } else 2059fc384fa5SBjoern A. Zeeb sorwakeup_locked(last->inp_socket); 206082cd038dSYoshinobu Inoue opts = NULL; 206182cd038dSYoshinobu Inoue } 2062bb145f60SRobert Watson INP_RUNLOCK(last); 206382cd038dSYoshinobu Inoue } 206482cd038dSYoshinobu Inoue last = in6p; 206582cd038dSYoshinobu Inoue } 2066603724d3SBjoern A. Zeeb INP_INFO_RUNLOCK(&V_ripcbinfo); 2067aba53ef0SKip Macy if (last != NULL) { 206897590249SBjoern A. Zeeb if (last->inp_flags & INP_CONTROLOPTS) 206911de19f4SHajimu UMEMOTO ip6_savecontrol(last, m, &opts); 207082cd038dSYoshinobu Inoue /* strip intermediate headers */ 207182cd038dSYoshinobu Inoue m_adj(m, off); 2072657db3c8SHajimu UMEMOTO 2073657db3c8SHajimu UMEMOTO /* avoid using mbuf clusters if possible (see above) */ 2074657db3c8SHajimu UMEMOTO if ((m->m_flags & M_EXT) && m->m_next == NULL && 2075657db3c8SHajimu UMEMOTO m->m_len <= MHLEN) { 2076657db3c8SHajimu UMEMOTO struct mbuf *n; 2077657db3c8SHajimu UMEMOTO 20787b07d1beSGleb Smirnoff n = m_get(M_NOWAIT, m->m_type); 2079657db3c8SHajimu UMEMOTO if (n != NULL) { 2080c543ec4eSGeorge V. Neville-Neil if (m_dup_pkthdr(n, m, M_NOWAIT)) { 2081657db3c8SHajimu UMEMOTO bcopy(m->m_data, n->m_data, m->m_len); 2082657db3c8SHajimu UMEMOTO n->m_len = m->m_len; 2083657db3c8SHajimu UMEMOTO 2084657db3c8SHajimu UMEMOTO m_freem(m); 2085657db3c8SHajimu UMEMOTO m = n; 2086c543ec4eSGeorge V. Neville-Neil } else { 2087c543ec4eSGeorge V. Neville-Neil m_freem(n); 2088c543ec4eSGeorge V. Neville-Neil n = NULL; 2089c543ec4eSGeorge V. Neville-Neil } 2090657db3c8SHajimu UMEMOTO } 2091657db3c8SHajimu UMEMOTO } 2092fc384fa5SBjoern A. Zeeb SOCKBUF_LOCK(&last->inp_socket->so_rcv); 2093fc384fa5SBjoern A. Zeeb if (sbappendaddr_locked(&last->inp_socket->so_rcv, 20949a4f9608SHajimu UMEMOTO (struct sockaddr *)&fromsa, m, opts) == 0) { 209582cd038dSYoshinobu Inoue m_freem(m); 209682cd038dSYoshinobu Inoue if (opts) 209782cd038dSYoshinobu Inoue m_freem(opts); 2098fc384fa5SBjoern A. Zeeb SOCKBUF_UNLOCK(&last->inp_socket->so_rcv); 20994cc20ab1SSeigo Tanimura } else 2100fc384fa5SBjoern A. Zeeb sorwakeup_locked(last->inp_socket); 2101bb145f60SRobert Watson INP_RUNLOCK(last); 210282cd038dSYoshinobu Inoue } else { 210382cd038dSYoshinobu Inoue m_freem(m); 210433cde130SBruce M Simpson IP6STAT_DEC(ip6s_delivered); 210582cd038dSYoshinobu Inoue } 210682cd038dSYoshinobu Inoue return IPPROTO_DONE; 210782cd038dSYoshinobu Inoue } 210882cd038dSYoshinobu Inoue 210982cd038dSYoshinobu Inoue /* 211082cd038dSYoshinobu Inoue * Reflect the ip6 packet back to the source. 2111686cdd19SJun-ichiro itojun Hagino * OFF points to the icmp6 header, counted from the top of the mbuf. 211282cd038dSYoshinobu Inoue */ 211382cd038dSYoshinobu Inoue void 21141272577eSXin LI icmp6_reflect(struct mbuf *m, size_t off) 211582cd038dSYoshinobu Inoue { 21163e88eb90SAndrey V. Elsukov struct in6_addr src, *srcp = NULL; 2117686cdd19SJun-ichiro itojun Hagino struct ip6_hdr *ip6; 211882cd038dSYoshinobu Inoue struct icmp6_hdr *icmp6; 21198c0fec80SRobert Watson struct in6_ifaddr *ia = NULL; 21203e88eb90SAndrey V. Elsukov struct ifnet *outif = NULL; 2121686cdd19SJun-ichiro itojun Hagino int plen; 212282cd038dSYoshinobu Inoue int type, code; 212382cd038dSYoshinobu Inoue 2124686cdd19SJun-ichiro itojun Hagino /* too short to reflect */ 2125686cdd19SJun-ichiro itojun Hagino if (off < sizeof(struct ip6_hdr)) { 212633841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 212733841545SHajimu UMEMOTO "sanity fail: off=%lx, sizeof(ip6)=%lx in %s:%d\n", 2128686cdd19SJun-ichiro itojun Hagino (u_long)off, (u_long)sizeof(struct ip6_hdr), 212933841545SHajimu UMEMOTO __FILE__, __LINE__)); 2130686cdd19SJun-ichiro itojun Hagino goto bad; 2131686cdd19SJun-ichiro itojun Hagino } 2132686cdd19SJun-ichiro itojun Hagino 213382cd038dSYoshinobu Inoue /* 213482cd038dSYoshinobu Inoue * If there are extra headers between IPv6 and ICMPv6, strip 213582cd038dSYoshinobu Inoue * off that header first. 213682cd038dSYoshinobu Inoue */ 2137686cdd19SJun-ichiro itojun Hagino #ifdef DIAGNOSTIC 2138686cdd19SJun-ichiro itojun Hagino if (sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) > MHLEN) 2139686cdd19SJun-ichiro itojun Hagino panic("assumption failed in icmp6_reflect"); 2140686cdd19SJun-ichiro itojun Hagino #endif 2141686cdd19SJun-ichiro itojun Hagino if (off > sizeof(struct ip6_hdr)) { 2142686cdd19SJun-ichiro itojun Hagino size_t l; 2143686cdd19SJun-ichiro itojun Hagino struct ip6_hdr nip6; 214482cd038dSYoshinobu Inoue 2145686cdd19SJun-ichiro itojun Hagino l = off - sizeof(struct ip6_hdr); 2146686cdd19SJun-ichiro itojun Hagino m_copydata(m, 0, sizeof(nip6), (caddr_t)&nip6); 2147686cdd19SJun-ichiro itojun Hagino m_adj(m, l); 2148686cdd19SJun-ichiro itojun Hagino l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 2149686cdd19SJun-ichiro itojun Hagino if (m->m_len < l) { 2150686cdd19SJun-ichiro itojun Hagino if ((m = m_pullup(m, l)) == NULL) 2151686cdd19SJun-ichiro itojun Hagino return; 215282cd038dSYoshinobu Inoue } 2153686cdd19SJun-ichiro itojun Hagino bcopy((caddr_t)&nip6, mtod(m, caddr_t), sizeof(nip6)); 2154686cdd19SJun-ichiro itojun Hagino } else /* off == sizeof(struct ip6_hdr) */ { 2155686cdd19SJun-ichiro itojun Hagino size_t l; 2156686cdd19SJun-ichiro itojun Hagino l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr); 2157686cdd19SJun-ichiro itojun Hagino if (m->m_len < l) { 2158686cdd19SJun-ichiro itojun Hagino if ((m = m_pullup(m, l)) == NULL) 2159686cdd19SJun-ichiro itojun Hagino return; 216082cd038dSYoshinobu Inoue } 2161686cdd19SJun-ichiro itojun Hagino } 2162686cdd19SJun-ichiro itojun Hagino plen = m->m_pkthdr.len - sizeof(struct ip6_hdr); 216382cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 216482cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 216582cd038dSYoshinobu Inoue icmp6 = (struct icmp6_hdr *)(ip6 + 1); 216682cd038dSYoshinobu Inoue type = icmp6->icmp6_type; /* keep type for statistics */ 216782cd038dSYoshinobu Inoue code = icmp6->icmp6_code; /* ditto. */ 216882cd038dSYoshinobu Inoue 216982cd038dSYoshinobu Inoue /* 217082cd038dSYoshinobu Inoue * If the incoming packet was addressed directly to us (i.e. unicast), 217182cd038dSYoshinobu Inoue * use dst as the src for the reply. 217206cd0a3fSHajimu UMEMOTO * The IN6_IFF_NOTREADY case should be VERY rare, but is possible 2173686cdd19SJun-ichiro itojun Hagino * (for example) when we encounter an error while forwarding procedure 2174686cdd19SJun-ichiro itojun Hagino * destined to a duplicated address of ours. 217582cd038dSYoshinobu Inoue */ 21763e88eb90SAndrey V. Elsukov if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 21773e88eb90SAndrey V. Elsukov ia = in6ifa_ifwithaddr(&ip6->ip6_dst, 0 /* XXX */); 21783e88eb90SAndrey V. Elsukov if (ia != NULL && !(ia->ia6_flags & 2179a1f7e5f8SHajimu UMEMOTO (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY))) 218088d166bfSBjoern A. Zeeb srcp = &ia->ia_addr.sin6_addr; 218182cd038dSYoshinobu Inoue } 218282cd038dSYoshinobu Inoue 218388d166bfSBjoern A. Zeeb if (srcp == NULL) { 218433841545SHajimu UMEMOTO int e; 2185a1f7e5f8SHajimu UMEMOTO struct sockaddr_in6 sin6; 218633841545SHajimu UMEMOTO struct route_in6 ro; 218733841545SHajimu UMEMOTO 218882cd038dSYoshinobu Inoue /* 2189686cdd19SJun-ichiro itojun Hagino * This case matches to multicasts, our anycast, or unicasts 219033841545SHajimu UMEMOTO * that we do not own. Select a source address based on the 219133841545SHajimu UMEMOTO * source address of the erroneous packet. 219282cd038dSYoshinobu Inoue */ 2193a1f7e5f8SHajimu UMEMOTO bzero(&sin6, sizeof(sin6)); 2194a1f7e5f8SHajimu UMEMOTO sin6.sin6_family = AF_INET6; 2195a1f7e5f8SHajimu UMEMOTO sin6.sin6_len = sizeof(sin6); 2196a1f7e5f8SHajimu UMEMOTO sin6.sin6_addr = ip6->ip6_dst; /* zone ID should be embedded */ 2197a1f7e5f8SHajimu UMEMOTO 219833841545SHajimu UMEMOTO bzero(&ro, sizeof(ro)); 219988d166bfSBjoern A. Zeeb e = in6_selectsrc(&sin6, NULL, NULL, &ro, NULL, &outif, &src); 220033841545SHajimu UMEMOTO if (ro.ro_rt) 220133841545SHajimu UMEMOTO RTFREE(ro.ro_rt); /* XXX: we could use this */ 220288d166bfSBjoern A. Zeeb if (e) { 22031d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 220433841545SHajimu UMEMOTO nd6log((LOG_DEBUG, 220533841545SHajimu UMEMOTO "icmp6_reflect: source can't be determined: " 220633841545SHajimu UMEMOTO "dst=%s, error=%d\n", 22071d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &sin6.sin6_addr), e)); 220882cd038dSYoshinobu Inoue goto bad; 220933841545SHajimu UMEMOTO } 221088d166bfSBjoern A. Zeeb srcp = &src; 221133841545SHajimu UMEMOTO } 22123e88eb90SAndrey V. Elsukov /* 22133e88eb90SAndrey V. Elsukov * ip6_input() drops a packet if its src is multicast. 22143e88eb90SAndrey V. Elsukov * So, the src is never multicast. 22153e88eb90SAndrey V. Elsukov */ 22163e88eb90SAndrey V. Elsukov ip6->ip6_dst = ip6->ip6_src; 221788d166bfSBjoern A. Zeeb ip6->ip6_src = *srcp; 221882cd038dSYoshinobu Inoue ip6->ip6_flow = 0; 2219686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 2220686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc |= IPV6_VERSION; 222182cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 2222f95d4633SHajimu UMEMOTO if (outif) 2223f95d4633SHajimu UMEMOTO ip6->ip6_hlim = ND_IFINFO(outif)->chlim; 2224f95d4633SHajimu UMEMOTO else if (m->m_pkthdr.rcvif) { 222582cd038dSYoshinobu Inoue /* XXX: This may not be the outgoing interface */ 222631b1bfe1SHajimu UMEMOTO ip6->ip6_hlim = ND_IFINFO(m->m_pkthdr.rcvif)->chlim; 222733841545SHajimu UMEMOTO } else 2228603724d3SBjoern A. Zeeb ip6->ip6_hlim = V_ip6_defhlim; 222982cd038dSYoshinobu Inoue 223082cd038dSYoshinobu Inoue icmp6->icmp6_cksum = 0; 223182cd038dSYoshinobu Inoue icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6, 223282cd038dSYoshinobu Inoue sizeof(struct ip6_hdr), plen); 223382cd038dSYoshinobu Inoue 223482cd038dSYoshinobu Inoue /* 223533841545SHajimu UMEMOTO * XXX option handling 223682cd038dSYoshinobu Inoue */ 223782cd038dSYoshinobu Inoue 223882cd038dSYoshinobu Inoue m->m_flags &= ~(M_BCAST|M_MCAST); 223982cd038dSYoshinobu Inoue 22405d846453SSam Leffler ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL); 224182cd038dSYoshinobu Inoue if (outif) 224282cd038dSYoshinobu Inoue icmp6_ifoutstat_inc(outif, type, code); 224382cd038dSYoshinobu Inoue 22448c0fec80SRobert Watson if (ia != NULL) 22458c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 224682cd038dSYoshinobu Inoue return; 224782cd038dSYoshinobu Inoue 224882cd038dSYoshinobu Inoue bad: 22498c0fec80SRobert Watson if (ia != NULL) 22508c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 225182cd038dSYoshinobu Inoue m_freem(m); 225282cd038dSYoshinobu Inoue return; 225382cd038dSYoshinobu Inoue } 225482cd038dSYoshinobu Inoue 225582cd038dSYoshinobu Inoue void 22561272577eSXin LI icmp6_fasttimo(void) 225782cd038dSYoshinobu Inoue { 2258686cdd19SJun-ichiro itojun Hagino 225933cde130SBruce M Simpson mld_fasttimo(); 226033cde130SBruce M Simpson } 226133cde130SBruce M Simpson 226233cde130SBruce M Simpson void 226333cde130SBruce M Simpson icmp6_slowtimo(void) 226433cde130SBruce M Simpson { 226533cde130SBruce M Simpson 226633cde130SBruce M Simpson mld_slowtimo(); 226782cd038dSYoshinobu Inoue } 226882cd038dSYoshinobu Inoue 226982cd038dSYoshinobu Inoue static const char * 22701272577eSXin LI icmp6_redirect_diag(struct in6_addr *src6, struct in6_addr *dst6, 22711272577eSXin LI struct in6_addr *tgt6) 227282cd038dSYoshinobu Inoue { 227382cd038dSYoshinobu Inoue static char buf[1024]; 22741d54aa3bSBjoern A. Zeeb char ip6bufs[INET6_ADDRSTRLEN]; 22751d54aa3bSBjoern A. Zeeb char ip6bufd[INET6_ADDRSTRLEN]; 22761d54aa3bSBjoern A. Zeeb char ip6buft[INET6_ADDRSTRLEN]; 227782cd038dSYoshinobu Inoue snprintf(buf, sizeof(buf), "(src=%s dst=%s tgt=%s)", 22781d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6bufs, src6), ip6_sprintf(ip6bufd, dst6), 22791d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buft, tgt6)); 228082cd038dSYoshinobu Inoue return buf; 228182cd038dSYoshinobu Inoue } 228282cd038dSYoshinobu Inoue 228382cd038dSYoshinobu Inoue void 22841272577eSXin LI icmp6_redirect_input(struct mbuf *m, int off) 228582cd038dSYoshinobu Inoue { 22862cb64cb2SGeorge V. Neville-Neil struct ifnet *ifp; 228782cd038dSYoshinobu Inoue struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 2288686cdd19SJun-ichiro itojun Hagino struct nd_redirect *nd_rd; 228982cd038dSYoshinobu Inoue int icmp6len = ntohs(ip6->ip6_plen); 229082cd038dSYoshinobu Inoue char *lladdr = NULL; 229182cd038dSYoshinobu Inoue int lladdrlen = 0; 229282cd038dSYoshinobu Inoue struct rtentry *rt = NULL; 229382cd038dSYoshinobu Inoue int is_router; 229482cd038dSYoshinobu Inoue int is_onlink; 229582cd038dSYoshinobu Inoue struct in6_addr src6 = ip6->ip6_src; 2296686cdd19SJun-ichiro itojun Hagino struct in6_addr redtgt6; 2297686cdd19SJun-ichiro itojun Hagino struct in6_addr reddst6; 229882cd038dSYoshinobu Inoue union nd_opts ndopts; 22991d54aa3bSBjoern A. Zeeb char ip6buf[INET6_ADDRSTRLEN]; 230082cd038dSYoshinobu Inoue 230137c1ff48SGleb Smirnoff M_ASSERTPKTHDR(m); 230237c1ff48SGleb Smirnoff KASSERT(m->m_pkthdr.rcvif != NULL, ("%s: no rcvif", __func__)); 23032cb64cb2SGeorge V. Neville-Neil 23042cb64cb2SGeorge V. Neville-Neil ifp = m->m_pkthdr.rcvif; 23052cb64cb2SGeorge V. Neville-Neil 230682cd038dSYoshinobu Inoue /* XXX if we are router, we don't update route by icmp6 redirect */ 2307603724d3SBjoern A. Zeeb if (V_ip6_forwarding) 2308686cdd19SJun-ichiro itojun Hagino goto freeit; 2309603724d3SBjoern A. Zeeb if (!V_icmp6_rediraccept) 2310686cdd19SJun-ichiro itojun Hagino goto freeit; 2311686cdd19SJun-ichiro itojun Hagino 2312686cdd19SJun-ichiro itojun Hagino #ifndef PULLDOWN_TEST 2313686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_CHECK(m, off, icmp6len,); 2314686cdd19SJun-ichiro itojun Hagino nd_rd = (struct nd_redirect *)((caddr_t)ip6 + off); 2315686cdd19SJun-ichiro itojun Hagino #else 2316686cdd19SJun-ichiro itojun Hagino IP6_EXTHDR_GET(nd_rd, struct nd_redirect *, m, off, icmp6len); 2317686cdd19SJun-ichiro itojun Hagino if (nd_rd == NULL) { 2318e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_tooshort); 231982cd038dSYoshinobu Inoue return; 2320686cdd19SJun-ichiro itojun Hagino } 2321686cdd19SJun-ichiro itojun Hagino #endif 2322686cdd19SJun-ichiro itojun Hagino redtgt6 = nd_rd->nd_rd_target; 2323686cdd19SJun-ichiro itojun Hagino reddst6 = nd_rd->nd_rd_dst; 232482cd038dSYoshinobu Inoue 2325a1f7e5f8SHajimu UMEMOTO if (in6_setscope(&redtgt6, m->m_pkthdr.rcvif, NULL) || 2326a1f7e5f8SHajimu UMEMOTO in6_setscope(&reddst6, m->m_pkthdr.rcvif, NULL)) { 2327a1f7e5f8SHajimu UMEMOTO goto freeit; 2328a1f7e5f8SHajimu UMEMOTO } 232982cd038dSYoshinobu Inoue 233082cd038dSYoshinobu Inoue /* validation */ 233182cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_LINKLOCAL(&src6)) { 233233841545SHajimu UMEMOTO nd6log((LOG_ERR, 233382cd038dSYoshinobu Inoue "ICMP6 redirect sent from %s rejected; " 233406cd0a3fSHajimu UMEMOTO "must be from linklocal\n", 23351d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &src6))); 233633841545SHajimu UMEMOTO goto bad; 233782cd038dSYoshinobu Inoue } 233882cd038dSYoshinobu Inoue if (ip6->ip6_hlim != 255) { 233933841545SHajimu UMEMOTO nd6log((LOG_ERR, 234082cd038dSYoshinobu Inoue "ICMP6 redirect sent from %s rejected; " 234182cd038dSYoshinobu Inoue "hlim=%d (must be 255)\n", 23421d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, &src6), ip6->ip6_hlim)); 234333841545SHajimu UMEMOTO goto bad; 234482cd038dSYoshinobu Inoue } 234582cd038dSYoshinobu Inoue { 234682cd038dSYoshinobu Inoue /* ip6->ip6_src must be equal to gw for icmp6->icmp6_reddst */ 234782cd038dSYoshinobu Inoue struct sockaddr_in6 sin6; 234882cd038dSYoshinobu Inoue struct in6_addr *gw6; 234982cd038dSYoshinobu Inoue 235082cd038dSYoshinobu Inoue bzero(&sin6, sizeof(sin6)); 235182cd038dSYoshinobu Inoue sin6.sin6_family = AF_INET6; 235282cd038dSYoshinobu Inoue sin6.sin6_len = sizeof(struct sockaddr_in6); 235382cd038dSYoshinobu Inoue bcopy(&reddst6, &sin6.sin6_addr, sizeof(reddst6)); 235481d5d46bSBjoern A. Zeeb rt = in6_rtalloc1((struct sockaddr *)&sin6, 0, 0UL, RT_DEFAULT_FIB); 235582cd038dSYoshinobu Inoue if (rt) { 2356deebc913SHajimu UMEMOTO if (rt->rt_gateway == NULL || 2357deebc913SHajimu UMEMOTO rt->rt_gateway->sa_family != AF_INET6) { 23582cf62998SBjoern A. Zeeb RTFREE_LOCKED(rt); 235933841545SHajimu UMEMOTO nd6log((LOG_ERR, 2360deebc913SHajimu UMEMOTO "ICMP6 redirect rejected; no route " 2361deebc913SHajimu UMEMOTO "with inet6 gateway found for redirect dst: %s\n", 236233841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 236333841545SHajimu UMEMOTO goto bad; 2364deebc913SHajimu UMEMOTO } 2365deebc913SHajimu UMEMOTO 236682cd038dSYoshinobu Inoue gw6 = &(((struct sockaddr_in6 *)rt->rt_gateway)->sin6_addr); 236782cd038dSYoshinobu Inoue if (bcmp(&src6, gw6, sizeof(struct in6_addr)) != 0) { 23682cf62998SBjoern A. Zeeb RTFREE_LOCKED(rt); 236933841545SHajimu UMEMOTO nd6log((LOG_ERR, 237082cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 237182cd038dSYoshinobu Inoue "not equal to gw-for-src=%s (must be same): " 237282cd038dSYoshinobu Inoue "%s\n", 23731d54aa3bSBjoern A. Zeeb ip6_sprintf(ip6buf, gw6), 237433841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 237533841545SHajimu UMEMOTO goto bad; 237682cd038dSYoshinobu Inoue } 237782cd038dSYoshinobu Inoue } else { 237833841545SHajimu UMEMOTO nd6log((LOG_ERR, 237982cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 238082cd038dSYoshinobu Inoue "no route found for redirect dst: %s\n", 238133841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 238233841545SHajimu UMEMOTO goto bad; 238382cd038dSYoshinobu Inoue } 2384d1dd20beSSam Leffler RTFREE_LOCKED(rt); 238582cd038dSYoshinobu Inoue rt = NULL; 238682cd038dSYoshinobu Inoue } 238782cd038dSYoshinobu Inoue if (IN6_IS_ADDR_MULTICAST(&reddst6)) { 238833841545SHajimu UMEMOTO nd6log((LOG_ERR, 238982cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 239082cd038dSYoshinobu Inoue "redirect dst must be unicast: %s\n", 239133841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 239233841545SHajimu UMEMOTO goto bad; 239382cd038dSYoshinobu Inoue } 239482cd038dSYoshinobu Inoue 239582cd038dSYoshinobu Inoue is_router = is_onlink = 0; 239682cd038dSYoshinobu Inoue if (IN6_IS_ADDR_LINKLOCAL(&redtgt6)) 239782cd038dSYoshinobu Inoue is_router = 1; /* router case */ 239882cd038dSYoshinobu Inoue if (bcmp(&redtgt6, &reddst6, sizeof(redtgt6)) == 0) 239982cd038dSYoshinobu Inoue is_onlink = 1; /* on-link destination case */ 240082cd038dSYoshinobu Inoue if (!is_router && !is_onlink) { 240133841545SHajimu UMEMOTO nd6log((LOG_ERR, 240282cd038dSYoshinobu Inoue "ICMP6 redirect rejected; " 240382cd038dSYoshinobu Inoue "neither router case nor onlink case: %s\n", 240433841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 240533841545SHajimu UMEMOTO goto bad; 240682cd038dSYoshinobu Inoue } 240782cd038dSYoshinobu Inoue 240882cd038dSYoshinobu Inoue icmp6len -= sizeof(*nd_rd); 240982cd038dSYoshinobu Inoue nd6_option_init(nd_rd + 1, icmp6len, &ndopts); 241082cd038dSYoshinobu Inoue if (nd6_options(&ndopts) < 0) { 241137c1ff48SGleb Smirnoff nd6log((LOG_INFO, "%s: invalid ND option, rejected: %s\n", 241237c1ff48SGleb Smirnoff __func__, icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 241333841545SHajimu UMEMOTO /* nd6_options have incremented stats */ 2414686cdd19SJun-ichiro itojun Hagino goto freeit; 241582cd038dSYoshinobu Inoue } 241682cd038dSYoshinobu Inoue 241782cd038dSYoshinobu Inoue if (ndopts.nd_opts_tgt_lladdr) { 241882cd038dSYoshinobu Inoue lladdr = (char *)(ndopts.nd_opts_tgt_lladdr + 1); 241982cd038dSYoshinobu Inoue lladdrlen = ndopts.nd_opts_tgt_lladdr->nd_opt_len << 3; 242082cd038dSYoshinobu Inoue } 242182cd038dSYoshinobu Inoue 242282cd038dSYoshinobu Inoue if (lladdr && ((ifp->if_addrlen + 2 + 7) & ~7) != lladdrlen) { 242337c1ff48SGleb Smirnoff nd6log((LOG_INFO, "%s: lladdrlen mismatch for %s " 242482cd038dSYoshinobu Inoue "(if %d, icmp6 packet %d): %s\n", 242537c1ff48SGleb Smirnoff __func__, ip6_sprintf(ip6buf, &redtgt6), 24261d54aa3bSBjoern A. Zeeb ifp->if_addrlen, lladdrlen - 2, 242733841545SHajimu UMEMOTO icmp6_redirect_diag(&src6, &reddst6, &redtgt6))); 242833841545SHajimu UMEMOTO goto bad; 242982cd038dSYoshinobu Inoue } 243082cd038dSYoshinobu Inoue 2431*bfbc08b8SBjoern A. Zeeb /* Validation passed. */ 2432*bfbc08b8SBjoern A. Zeeb 243382cd038dSYoshinobu Inoue /* RFC 2461 8.3 */ 243482cd038dSYoshinobu Inoue nd6_cache_lladdr(ifp, &redtgt6, lladdr, lladdrlen, ND_REDIRECT, 243582cd038dSYoshinobu Inoue is_onlink ? ND_REDIRECT_ONLINK : ND_REDIRECT_ROUTER); 243682cd038dSYoshinobu Inoue 243782cd038dSYoshinobu Inoue if (!is_onlink) { /* better router case. perform rtredirect. */ 243882cd038dSYoshinobu Inoue /* perform rtredirect */ 243982cd038dSYoshinobu Inoue struct sockaddr_in6 sdst; 244082cd038dSYoshinobu Inoue struct sockaddr_in6 sgw; 244182cd038dSYoshinobu Inoue struct sockaddr_in6 ssrc; 244281d5d46bSBjoern A. Zeeb u_int fibnum; 244382cd038dSYoshinobu Inoue 244482cd038dSYoshinobu Inoue bzero(&sdst, sizeof(sdst)); 244582cd038dSYoshinobu Inoue bzero(&sgw, sizeof(sgw)); 244682cd038dSYoshinobu Inoue bzero(&ssrc, sizeof(ssrc)); 244782cd038dSYoshinobu Inoue sdst.sin6_family = sgw.sin6_family = ssrc.sin6_family = AF_INET6; 244882cd038dSYoshinobu Inoue sdst.sin6_len = sgw.sin6_len = ssrc.sin6_len = 244982cd038dSYoshinobu Inoue sizeof(struct sockaddr_in6); 245082cd038dSYoshinobu Inoue bcopy(&redtgt6, &sgw.sin6_addr, sizeof(struct in6_addr)); 245182cd038dSYoshinobu Inoue bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr)); 245282cd038dSYoshinobu Inoue bcopy(&src6, &ssrc.sin6_addr, sizeof(struct in6_addr)); 245381d5d46bSBjoern A. Zeeb for (fibnum = 0; fibnum < rt_numfibs; fibnum++) 245481d5d46bSBjoern A. Zeeb in6_rtredirect((struct sockaddr *)&sdst, 245581d5d46bSBjoern A. Zeeb (struct sockaddr *)&sgw, (struct sockaddr *)NULL, 245681d5d46bSBjoern A. Zeeb RTF_GATEWAY | RTF_HOST, (struct sockaddr *)&ssrc, 245781d5d46bSBjoern A. Zeeb fibnum); 245882cd038dSYoshinobu Inoue } 245982cd038dSYoshinobu Inoue /* finally update cached route in each socket via pfctlinput */ 246082cd038dSYoshinobu Inoue { 246182cd038dSYoshinobu Inoue struct sockaddr_in6 sdst; 246282cd038dSYoshinobu Inoue 246382cd038dSYoshinobu Inoue bzero(&sdst, sizeof(sdst)); 246482cd038dSYoshinobu Inoue sdst.sin6_family = AF_INET6; 246582cd038dSYoshinobu Inoue sdst.sin6_len = sizeof(struct sockaddr_in6); 246682cd038dSYoshinobu Inoue bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr)); 246782cd038dSYoshinobu Inoue pfctlinput(PRC_REDIRECT_HOST, (struct sockaddr *)&sdst); 246882cd038dSYoshinobu Inoue } 2469686cdd19SJun-ichiro itojun Hagino 2470686cdd19SJun-ichiro itojun Hagino freeit: 2471686cdd19SJun-ichiro itojun Hagino m_freem(m); 247233841545SHajimu UMEMOTO return; 247333841545SHajimu UMEMOTO 247433841545SHajimu UMEMOTO bad: 2475e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_badredirect); 247633841545SHajimu UMEMOTO m_freem(m); 247782cd038dSYoshinobu Inoue } 247882cd038dSYoshinobu Inoue 247982cd038dSYoshinobu Inoue void 24801272577eSXin LI icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt) 248182cd038dSYoshinobu Inoue { 248282cd038dSYoshinobu Inoue struct ifnet *ifp; /* my outgoing interface */ 248382cd038dSYoshinobu Inoue struct in6_addr *ifp_ll6; 248482cd038dSYoshinobu Inoue struct in6_addr *router_ll6; 248582cd038dSYoshinobu Inoue struct ip6_hdr *sip6; /* m0 as struct ip6_hdr */ 248682cd038dSYoshinobu Inoue struct mbuf *m = NULL; /* newly allocated one */ 24871db8d1f8SAna Kukec struct m_tag *mtag; 248882cd038dSYoshinobu Inoue struct ip6_hdr *ip6; /* m as struct ip6_hdr */ 248982cd038dSYoshinobu Inoue struct nd_redirect *nd_rd; 249056c423b0SKip Macy struct llentry *ln = NULL; 249182cd038dSYoshinobu Inoue size_t maxlen; 249282cd038dSYoshinobu Inoue u_char *p; 249382cd038dSYoshinobu Inoue struct ifnet *outif = NULL; 2494686cdd19SJun-ichiro itojun Hagino struct sockaddr_in6 src_sa; 2495686cdd19SJun-ichiro itojun Hagino 249649dc650cSAndrey V. Elsukov icmp6_errcount(ND_REDIRECT, 0); 249782cd038dSYoshinobu Inoue 249882cd038dSYoshinobu Inoue /* if we are not router, we don't send icmp6 redirect */ 2499603724d3SBjoern A. Zeeb if (!V_ip6_forwarding) 250082cd038dSYoshinobu Inoue goto fail; 250182cd038dSYoshinobu Inoue 250282cd038dSYoshinobu Inoue /* sanity check */ 250382cd038dSYoshinobu Inoue if (!m0 || !rt || !(rt->rt_flags & RTF_UP) || !(ifp = rt->rt_ifp)) 250482cd038dSYoshinobu Inoue goto fail; 250582cd038dSYoshinobu Inoue 250682cd038dSYoshinobu Inoue /* 250782cd038dSYoshinobu Inoue * Address check: 250882cd038dSYoshinobu Inoue * the source address must identify a neighbor, and 250982cd038dSYoshinobu Inoue * the destination address must not be a multicast address 251082cd038dSYoshinobu Inoue * [RFC 2461, sec 8.2] 251182cd038dSYoshinobu Inoue */ 251282cd038dSYoshinobu Inoue sip6 = mtod(m0, struct ip6_hdr *); 2513686cdd19SJun-ichiro itojun Hagino bzero(&src_sa, sizeof(src_sa)); 2514686cdd19SJun-ichiro itojun Hagino src_sa.sin6_family = AF_INET6; 2515686cdd19SJun-ichiro itojun Hagino src_sa.sin6_len = sizeof(src_sa); 2516686cdd19SJun-ichiro itojun Hagino src_sa.sin6_addr = sip6->ip6_src; 2517686cdd19SJun-ichiro itojun Hagino if (nd6_is_addr_neighbor(&src_sa, ifp) == 0) 251882cd038dSYoshinobu Inoue goto fail; 251982cd038dSYoshinobu Inoue if (IN6_IS_ADDR_MULTICAST(&sip6->ip6_dst)) 252082cd038dSYoshinobu Inoue goto fail; /* what should we do here? */ 252182cd038dSYoshinobu Inoue 252282cd038dSYoshinobu Inoue /* rate limit */ 252382cd038dSYoshinobu Inoue if (icmp6_ratelimit(&sip6->ip6_src, ND_REDIRECT, 0)) 252482cd038dSYoshinobu Inoue goto fail; 252582cd038dSYoshinobu Inoue 252682cd038dSYoshinobu Inoue /* 252782cd038dSYoshinobu Inoue * Since we are going to append up to 1280 bytes (= IPV6_MMTU), 252882cd038dSYoshinobu Inoue * we almost always ask for an mbuf cluster for simplicity. 252982cd038dSYoshinobu Inoue * (MHLEN < IPV6_MMTU is almost always true) 253082cd038dSYoshinobu Inoue */ 2531686cdd19SJun-ichiro itojun Hagino #if IPV6_MMTU >= MCLBYTES 2532686cdd19SJun-ichiro itojun Hagino # error assumption failed about IPV6_MMTU and MCLBYTES 2533686cdd19SJun-ichiro itojun Hagino #endif 25347b07d1beSGleb Smirnoff m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 25357b07d1beSGleb Smirnoff if (m == NULL) 253682cd038dSYoshinobu Inoue goto fail; 253781d5d46bSBjoern A. Zeeb M_SETFIB(m, rt->rt_fibnum); 253833841545SHajimu UMEMOTO maxlen = M_TRAILINGSPACE(m); 253982cd038dSYoshinobu Inoue maxlen = min(IPV6_MMTU, maxlen); 254082cd038dSYoshinobu Inoue /* just for safety */ 2541686cdd19SJun-ichiro itojun Hagino if (maxlen < sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) + 2542686cdd19SJun-ichiro itojun Hagino ((sizeof(struct nd_opt_hdr) + ifp->if_addrlen + 7) & ~7)) { 254382cd038dSYoshinobu Inoue goto fail; 2544686cdd19SJun-ichiro itojun Hagino } 254582cd038dSYoshinobu Inoue 254682cd038dSYoshinobu Inoue { 254782cd038dSYoshinobu Inoue /* get ip6 linklocal address for ifp(my outgoing interface). */ 2548686cdd19SJun-ichiro itojun Hagino struct in6_ifaddr *ia; 2549686cdd19SJun-ichiro itojun Hagino if ((ia = in6ifa_ifpforlinklocal(ifp, 2550686cdd19SJun-ichiro itojun Hagino IN6_IFF_NOTREADY| 2551686cdd19SJun-ichiro itojun Hagino IN6_IFF_ANYCAST)) == NULL) 255282cd038dSYoshinobu Inoue goto fail; 255382cd038dSYoshinobu Inoue ifp_ll6 = &ia->ia_addr.sin6_addr; 25548c0fec80SRobert Watson /* XXXRW: reference released prematurely. */ 25558c0fec80SRobert Watson ifa_free(&ia->ia_ifa); 255682cd038dSYoshinobu Inoue } 255782cd038dSYoshinobu Inoue 255882cd038dSYoshinobu Inoue /* get ip6 linklocal address for the router. */ 255982cd038dSYoshinobu Inoue if (rt->rt_gateway && (rt->rt_flags & RTF_GATEWAY)) { 256082cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 256182cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)rt->rt_gateway; 256282cd038dSYoshinobu Inoue router_ll6 = &sin6->sin6_addr; 256382cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_LINKLOCAL(router_ll6)) 256482cd038dSYoshinobu Inoue router_ll6 = (struct in6_addr *)NULL; 256582cd038dSYoshinobu Inoue } else 256682cd038dSYoshinobu Inoue router_ll6 = (struct in6_addr *)NULL; 256782cd038dSYoshinobu Inoue 256882cd038dSYoshinobu Inoue /* ip6 */ 256982cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 257082cd038dSYoshinobu Inoue ip6->ip6_flow = 0; 2571686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc &= ~IPV6_VERSION_MASK; 2572686cdd19SJun-ichiro itojun Hagino ip6->ip6_vfc |= IPV6_VERSION; 257382cd038dSYoshinobu Inoue /* ip6->ip6_plen will be set later */ 257482cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_ICMPV6; 257582cd038dSYoshinobu Inoue ip6->ip6_hlim = 255; 257682cd038dSYoshinobu Inoue /* ip6->ip6_src must be linklocal addr for my outgoing if. */ 257782cd038dSYoshinobu Inoue bcopy(ifp_ll6, &ip6->ip6_src, sizeof(struct in6_addr)); 257882cd038dSYoshinobu Inoue bcopy(&sip6->ip6_src, &ip6->ip6_dst, sizeof(struct in6_addr)); 257982cd038dSYoshinobu Inoue 258082cd038dSYoshinobu Inoue /* ND Redirect */ 258182cd038dSYoshinobu Inoue nd_rd = (struct nd_redirect *)(ip6 + 1); 258282cd038dSYoshinobu Inoue nd_rd->nd_rd_type = ND_REDIRECT; 258382cd038dSYoshinobu Inoue nd_rd->nd_rd_code = 0; 258482cd038dSYoshinobu Inoue nd_rd->nd_rd_reserved = 0; 258582cd038dSYoshinobu Inoue if (rt->rt_flags & RTF_GATEWAY) { 258682cd038dSYoshinobu Inoue /* 258782cd038dSYoshinobu Inoue * nd_rd->nd_rd_target must be a link-local address in 258882cd038dSYoshinobu Inoue * better router cases. 258982cd038dSYoshinobu Inoue */ 259082cd038dSYoshinobu Inoue if (!router_ll6) 259182cd038dSYoshinobu Inoue goto fail; 259282cd038dSYoshinobu Inoue bcopy(router_ll6, &nd_rd->nd_rd_target, 259382cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_target)); 259482cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst, 259582cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_dst)); 259682cd038dSYoshinobu Inoue } else { 259782cd038dSYoshinobu Inoue /* make sure redtgt == reddst */ 259882cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_target, 259982cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_target)); 260082cd038dSYoshinobu Inoue bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst, 260182cd038dSYoshinobu Inoue sizeof(nd_rd->nd_rd_dst)); 260282cd038dSYoshinobu Inoue } 260382cd038dSYoshinobu Inoue 260482cd038dSYoshinobu Inoue p = (u_char *)(nd_rd + 1); 260582cd038dSYoshinobu Inoue 260682cd038dSYoshinobu Inoue if (!router_ll6) 260782cd038dSYoshinobu Inoue goto nolladdropt; 260882cd038dSYoshinobu Inoue 260982cd038dSYoshinobu Inoue { 261082cd038dSYoshinobu Inoue /* target lladdr option */ 261182cd038dSYoshinobu Inoue int len; 261282cd038dSYoshinobu Inoue struct nd_opt_hdr *nd_opt; 261382cd038dSYoshinobu Inoue char *lladdr; 261482cd038dSYoshinobu Inoue 261573cb2f38SAndrey V. Elsukov IF_AFDATA_RLOCK(ifp); 26166e6b3f7cSQing Li ln = nd6_lookup(router_ll6, 0, ifp); 261773cb2f38SAndrey V. Elsukov IF_AFDATA_RUNLOCK(ifp); 261856c423b0SKip Macy if (ln == NULL) 261982cd038dSYoshinobu Inoue goto nolladdropt; 26206e6b3f7cSQing Li 2621686cdd19SJun-ichiro itojun Hagino len = sizeof(*nd_opt) + ifp->if_addrlen; 2622686cdd19SJun-ichiro itojun Hagino len = (len + 7) & ~7; /* round by 8 */ 2623686cdd19SJun-ichiro itojun Hagino /* safety check */ 2624686cdd19SJun-ichiro itojun Hagino if (len + (p - (u_char *)ip6) > maxlen) 2625686cdd19SJun-ichiro itojun Hagino goto nolladdropt; 26266e6b3f7cSQing Li 26276e6b3f7cSQing Li if (ln->la_flags & LLE_VALID) { 262882cd038dSYoshinobu Inoue nd_opt = (struct nd_opt_hdr *)p; 262982cd038dSYoshinobu Inoue nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR; 263082cd038dSYoshinobu Inoue nd_opt->nd_opt_len = len >> 3; 263182cd038dSYoshinobu Inoue lladdr = (char *)(nd_opt + 1); 26326e6b3f7cSQing Li bcopy(&ln->ll_addr, lladdr, ifp->if_addrlen); 2633686cdd19SJun-ichiro itojun Hagino p += len; 263482cd038dSYoshinobu Inoue } 263582cd038dSYoshinobu Inoue } 263656c423b0SKip Macy nolladdropt: 263756c423b0SKip Macy if (ln != NULL) 263856c423b0SKip Macy LLE_RUNLOCK(ln); 263982cd038dSYoshinobu Inoue 264082cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len = p - (u_char *)ip6; 264182cd038dSYoshinobu Inoue 264282cd038dSYoshinobu Inoue /* just to be safe */ 2643686cdd19SJun-ichiro itojun Hagino #ifdef M_DECRYPTED /*not openbsd*/ 264482cd038dSYoshinobu Inoue if (m0->m_flags & M_DECRYPTED) 264582cd038dSYoshinobu Inoue goto noredhdropt; 2646686cdd19SJun-ichiro itojun Hagino #endif 2647686cdd19SJun-ichiro itojun Hagino if (p - (u_char *)ip6 > maxlen) 2648686cdd19SJun-ichiro itojun Hagino goto noredhdropt; 264982cd038dSYoshinobu Inoue 265082cd038dSYoshinobu Inoue { 265182cd038dSYoshinobu Inoue /* redirected header option */ 265282cd038dSYoshinobu Inoue int len; 265382cd038dSYoshinobu Inoue struct nd_opt_rd_hdr *nd_opt_rh; 265482cd038dSYoshinobu Inoue 265582cd038dSYoshinobu Inoue /* 265682cd038dSYoshinobu Inoue * compute the maximum size for icmp6 redirect header option. 265782cd038dSYoshinobu Inoue * XXX room for auth header? 265882cd038dSYoshinobu Inoue */ 265982cd038dSYoshinobu Inoue len = maxlen - (p - (u_char *)ip6); 266082cd038dSYoshinobu Inoue len &= ~7; 266182cd038dSYoshinobu Inoue 266282cd038dSYoshinobu Inoue /* This is just for simplicity. */ 266382cd038dSYoshinobu Inoue if (m0->m_pkthdr.len != m0->m_len) { 266482cd038dSYoshinobu Inoue if (m0->m_next) { 266582cd038dSYoshinobu Inoue m_freem(m0->m_next); 266682cd038dSYoshinobu Inoue m0->m_next = NULL; 266782cd038dSYoshinobu Inoue } 266882cd038dSYoshinobu Inoue m0->m_pkthdr.len = m0->m_len; 266982cd038dSYoshinobu Inoue } 267082cd038dSYoshinobu Inoue 267182cd038dSYoshinobu Inoue /* 267282cd038dSYoshinobu Inoue * Redirected header option spec (RFC2461 4.6.3) talks nothing 267382cd038dSYoshinobu Inoue * about padding/truncate rule for the original IP packet. 267406cd0a3fSHajimu UMEMOTO * From the discussion on IPv6imp in Feb 1999, 267506cd0a3fSHajimu UMEMOTO * the consensus was: 267682cd038dSYoshinobu Inoue * - "attach as much as possible" is the goal 267706cd0a3fSHajimu UMEMOTO * - pad if not aligned (original size can be guessed by 267806cd0a3fSHajimu UMEMOTO * original ip6 header) 267982cd038dSYoshinobu Inoue * Following code adds the padding if it is simple enough, 268082cd038dSYoshinobu Inoue * and truncates if not. 268182cd038dSYoshinobu Inoue */ 268282cd038dSYoshinobu Inoue if (m0->m_next || m0->m_pkthdr.len != m0->m_len) 268306cd0a3fSHajimu UMEMOTO panic("assumption failed in %s:%d", __FILE__, 268406cd0a3fSHajimu UMEMOTO __LINE__); 268582cd038dSYoshinobu Inoue 268682cd038dSYoshinobu Inoue if (len - sizeof(*nd_opt_rh) < m0->m_pkthdr.len) { 268782cd038dSYoshinobu Inoue /* not enough room, truncate */ 268806cd0a3fSHajimu UMEMOTO m0->m_pkthdr.len = m0->m_len = len - 268906cd0a3fSHajimu UMEMOTO sizeof(*nd_opt_rh); 269082cd038dSYoshinobu Inoue } else { 269182cd038dSYoshinobu Inoue /* enough room, pad or truncate */ 269282cd038dSYoshinobu Inoue size_t extra; 269382cd038dSYoshinobu Inoue 269482cd038dSYoshinobu Inoue extra = m0->m_pkthdr.len % 8; 269582cd038dSYoshinobu Inoue if (extra) { 269682cd038dSYoshinobu Inoue /* pad if easy enough, truncate if not */ 269782cd038dSYoshinobu Inoue if (8 - extra <= M_TRAILINGSPACE(m0)) { 269882cd038dSYoshinobu Inoue /* pad */ 269982cd038dSYoshinobu Inoue m0->m_len += (8 - extra); 270082cd038dSYoshinobu Inoue m0->m_pkthdr.len += (8 - extra); 270182cd038dSYoshinobu Inoue } else { 270282cd038dSYoshinobu Inoue /* truncate */ 270382cd038dSYoshinobu Inoue m0->m_pkthdr.len -= extra; 270482cd038dSYoshinobu Inoue m0->m_len -= extra; 270582cd038dSYoshinobu Inoue } 270682cd038dSYoshinobu Inoue } 270782cd038dSYoshinobu Inoue len = m0->m_pkthdr.len + sizeof(*nd_opt_rh); 270806cd0a3fSHajimu UMEMOTO m0->m_pkthdr.len = m0->m_len = len - 270906cd0a3fSHajimu UMEMOTO sizeof(*nd_opt_rh); 271082cd038dSYoshinobu Inoue } 271182cd038dSYoshinobu Inoue 271282cd038dSYoshinobu Inoue nd_opt_rh = (struct nd_opt_rd_hdr *)p; 271382cd038dSYoshinobu Inoue bzero(nd_opt_rh, sizeof(*nd_opt_rh)); 271482cd038dSYoshinobu Inoue nd_opt_rh->nd_opt_rh_type = ND_OPT_REDIRECTED_HEADER; 271582cd038dSYoshinobu Inoue nd_opt_rh->nd_opt_rh_len = len >> 3; 271682cd038dSYoshinobu Inoue p += sizeof(*nd_opt_rh); 271782cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len = p - (u_char *)ip6; 271882cd038dSYoshinobu Inoue 271982cd038dSYoshinobu Inoue /* connect m0 to m */ 2720db06e8a0SSUZUKI Shinsuke m_tag_delete_chain(m0, NULL); 2721db06e8a0SSUZUKI Shinsuke m0->m_flags &= ~M_PKTHDR; 272282cd038dSYoshinobu Inoue m->m_next = m0; 272382cd038dSYoshinobu Inoue m->m_pkthdr.len = m->m_len + m0->m_len; 2724db06e8a0SSUZUKI Shinsuke m0 = NULL; 272582cd038dSYoshinobu Inoue } 272682cd038dSYoshinobu Inoue noredhdropt:; 2727db06e8a0SSUZUKI Shinsuke if (m0) { 2728db06e8a0SSUZUKI Shinsuke m_freem(m0); 2729db06e8a0SSUZUKI Shinsuke m0 = NULL; 2730db06e8a0SSUZUKI Shinsuke } 273182cd038dSYoshinobu Inoue 27329a4f9608SHajimu UMEMOTO /* XXX: clear embedded link IDs in the inner header */ 27339a4f9608SHajimu UMEMOTO in6_clearscope(&sip6->ip6_src); 27349a4f9608SHajimu UMEMOTO in6_clearscope(&sip6->ip6_dst); 27359a4f9608SHajimu UMEMOTO in6_clearscope(&nd_rd->nd_rd_target); 27369a4f9608SHajimu UMEMOTO in6_clearscope(&nd_rd->nd_rd_dst); 273782cd038dSYoshinobu Inoue 273882cd038dSYoshinobu Inoue ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 273982cd038dSYoshinobu Inoue 274082cd038dSYoshinobu Inoue nd_rd->nd_rd_cksum = 0; 274106cd0a3fSHajimu UMEMOTO nd_rd->nd_rd_cksum = in6_cksum(m, IPPROTO_ICMPV6, 274206cd0a3fSHajimu UMEMOTO sizeof(*ip6), ntohs(ip6->ip6_plen)); 274382cd038dSYoshinobu Inoue 27441db8d1f8SAna Kukec if (send_sendso_input_hook != NULL) { 27451db8d1f8SAna Kukec mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, sizeof(unsigned short), 27461db8d1f8SAna Kukec M_NOWAIT); 27471db8d1f8SAna Kukec if (mtag == NULL) 27481db8d1f8SAna Kukec goto fail; 27491db8d1f8SAna Kukec *(unsigned short *)(mtag + 1) = nd_rd->nd_rd_type; 27501db8d1f8SAna Kukec m_tag_prepend(m, mtag); 27511db8d1f8SAna Kukec } 27521db8d1f8SAna Kukec 275382cd038dSYoshinobu Inoue /* send the packet to outside... */ 27545d846453SSam Leffler ip6_output(m, NULL, NULL, 0, NULL, &outif, NULL); 275582cd038dSYoshinobu Inoue if (outif) { 275682cd038dSYoshinobu Inoue icmp6_ifstat_inc(outif, ifs6_out_msg); 275782cd038dSYoshinobu Inoue icmp6_ifstat_inc(outif, ifs6_out_redirect); 275882cd038dSYoshinobu Inoue } 2759e27b0c87SRobert Watson ICMP6STAT_INC(icp6s_outhist[ND_REDIRECT]); 276082cd038dSYoshinobu Inoue 276182cd038dSYoshinobu Inoue return; 276282cd038dSYoshinobu Inoue 276382cd038dSYoshinobu Inoue fail: 276482cd038dSYoshinobu Inoue if (m) 276582cd038dSYoshinobu Inoue m_freem(m); 276682cd038dSYoshinobu Inoue if (m0) 276782cd038dSYoshinobu Inoue m_freem(m0); 276882cd038dSYoshinobu Inoue } 276982cd038dSYoshinobu Inoue 277082cd038dSYoshinobu Inoue /* 277182cd038dSYoshinobu Inoue * ICMPv6 socket option processing. 277282cd038dSYoshinobu Inoue */ 277382cd038dSYoshinobu Inoue int 27741272577eSXin LI icmp6_ctloutput(struct socket *so, struct sockopt *sopt) 277582cd038dSYoshinobu Inoue { 277682cd038dSYoshinobu Inoue int error = 0; 277782cd038dSYoshinobu Inoue int optlen; 277833841545SHajimu UMEMOTO struct inpcb *inp = sotoinpcb(so); 277982cd038dSYoshinobu Inoue int level, op, optname; 278082cd038dSYoshinobu Inoue 278182cd038dSYoshinobu Inoue if (sopt) { 278282cd038dSYoshinobu Inoue level = sopt->sopt_level; 278382cd038dSYoshinobu Inoue op = sopt->sopt_dir; 278482cd038dSYoshinobu Inoue optname = sopt->sopt_name; 278582cd038dSYoshinobu Inoue optlen = sopt->sopt_valsize; 278682cd038dSYoshinobu Inoue } else 278782cd038dSYoshinobu Inoue level = op = optname = optlen = 0; 278833841545SHajimu UMEMOTO 278982cd038dSYoshinobu Inoue if (level != IPPROTO_ICMPV6) { 279082cd038dSYoshinobu Inoue return EINVAL; 279182cd038dSYoshinobu Inoue } 279282cd038dSYoshinobu Inoue 279382cd038dSYoshinobu Inoue switch (op) { 279482cd038dSYoshinobu Inoue case PRCO_SETOPT: 279582cd038dSYoshinobu Inoue switch (optname) { 279682cd038dSYoshinobu Inoue case ICMP6_FILTER: 279782cd038dSYoshinobu Inoue { 2798ae89d5a3SRobert Watson struct icmp6_filter ic6f; 279982cd038dSYoshinobu Inoue 2800ae89d5a3SRobert Watson if (optlen != sizeof(ic6f)) { 280182cd038dSYoshinobu Inoue error = EMSGSIZE; 280282cd038dSYoshinobu Inoue break; 280382cd038dSYoshinobu Inoue } 2804ae89d5a3SRobert Watson error = sooptcopyin(sopt, &ic6f, optlen, optlen); 2805ae89d5a3SRobert Watson if (error == 0) { 2806ae89d5a3SRobert Watson INP_WLOCK(inp); 2807ae89d5a3SRobert Watson *inp->in6p_icmp6filt = ic6f; 2808ae89d5a3SRobert Watson INP_WUNLOCK(inp); 2809ae89d5a3SRobert Watson } 281082cd038dSYoshinobu Inoue break; 281182cd038dSYoshinobu Inoue } 281282cd038dSYoshinobu Inoue 281382cd038dSYoshinobu Inoue default: 281482cd038dSYoshinobu Inoue error = ENOPROTOOPT; 281582cd038dSYoshinobu Inoue break; 281682cd038dSYoshinobu Inoue } 281782cd038dSYoshinobu Inoue break; 281882cd038dSYoshinobu Inoue 281982cd038dSYoshinobu Inoue case PRCO_GETOPT: 282082cd038dSYoshinobu Inoue switch (optname) { 282182cd038dSYoshinobu Inoue case ICMP6_FILTER: 282282cd038dSYoshinobu Inoue { 2823ae89d5a3SRobert Watson struct icmp6_filter ic6f; 2824ae89d5a3SRobert Watson 2825ae89d5a3SRobert Watson INP_RLOCK(inp); 2826ae89d5a3SRobert Watson ic6f = *inp->in6p_icmp6filt; 2827ae89d5a3SRobert Watson INP_RUNLOCK(inp); 2828ae89d5a3SRobert Watson error = sooptcopyout(sopt, &ic6f, sizeof(ic6f)); 282982cd038dSYoshinobu Inoue break; 283082cd038dSYoshinobu Inoue } 283182cd038dSYoshinobu Inoue 283282cd038dSYoshinobu Inoue default: 283382cd038dSYoshinobu Inoue error = ENOPROTOOPT; 283482cd038dSYoshinobu Inoue break; 283582cd038dSYoshinobu Inoue } 283682cd038dSYoshinobu Inoue break; 283782cd038dSYoshinobu Inoue } 283882cd038dSYoshinobu Inoue 283982cd038dSYoshinobu Inoue return (error); 284082cd038dSYoshinobu Inoue } 284182cd038dSYoshinobu Inoue 284282cd038dSYoshinobu Inoue /* 284382cd038dSYoshinobu Inoue * Perform rate limit check. 284482cd038dSYoshinobu Inoue * Returns 0 if it is okay to send the icmp6 packet. 284582cd038dSYoshinobu Inoue * Returns 1 if the router SHOULD NOT send this icmp6 packet due to rate 284682cd038dSYoshinobu Inoue * limitation. 284782cd038dSYoshinobu Inoue * 284882cd038dSYoshinobu Inoue * XXX per-destination/type check necessary? 28491272577eSXin LI * 28501272577eSXin LI * dst - not used at this moment 28511272577eSXin LI * type - not used at this moment 28521272577eSXin LI * code - not used at this moment 285382cd038dSYoshinobu Inoue */ 285482cd038dSYoshinobu Inoue static int 28551272577eSXin LI icmp6_ratelimit(const struct in6_addr *dst, const int type, 28561272577eSXin LI const int code) 285782cd038dSYoshinobu Inoue { 2858686cdd19SJun-ichiro itojun Hagino int ret; 285982cd038dSYoshinobu Inoue 2860686cdd19SJun-ichiro itojun Hagino ret = 0; /* okay to send */ 286182cd038dSYoshinobu Inoue 2862686cdd19SJun-ichiro itojun Hagino /* PPS limit */ 2863603724d3SBjoern A. Zeeb if (!ppsratecheck(&V_icmp6errppslim_last, &V_icmp6errpps_count, 2864603724d3SBjoern A. Zeeb V_icmp6errppslim)) { 286582cd038dSYoshinobu Inoue /* The packet is subject to rate limit */ 2866686cdd19SJun-ichiro itojun Hagino ret++; 286782cd038dSYoshinobu Inoue } 286882cd038dSYoshinobu Inoue 2869686cdd19SJun-ichiro itojun Hagino return ret; 287082cd038dSYoshinobu Inoue } 2871