1caf43b02SWarner Losh /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 482cd038dSYoshinobu Inoue * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 582cd038dSYoshinobu Inoue * All rights reserved. 682cd038dSYoshinobu Inoue * 782cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 882cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 982cd038dSYoshinobu Inoue * are met: 1082cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 1182cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1282cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1382cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1482cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1582cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1682cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1782cd038dSYoshinobu Inoue * without specific prior written permission. 1882cd038dSYoshinobu Inoue * 1982cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2082cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2182cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2282cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2382cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2482cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2582cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2682cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2782cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2882cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2982cd038dSYoshinobu Inoue * SUCH DAMAGE. 30b48287a3SDavid E. O'Brien * 31b48287a3SDavid E. O'Brien * $KAME: ip6_output.c,v 1.279 2002/01/26 06:12:30 jinmei Exp $ 3282cd038dSYoshinobu Inoue */ 3382cd038dSYoshinobu Inoue 34caf43b02SWarner Losh /*- 3582cd038dSYoshinobu Inoue * Copyright (c) 1982, 1986, 1988, 1990, 1993 3682cd038dSYoshinobu Inoue * The Regents of the University of California. All rights reserved. 3782cd038dSYoshinobu Inoue * 3882cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 3982cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 4082cd038dSYoshinobu Inoue * are met: 4182cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 4282cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 4382cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 4482cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 4582cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 46fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 4782cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 4882cd038dSYoshinobu Inoue * without specific prior written permission. 4982cd038dSYoshinobu Inoue * 5082cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5182cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5282cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5382cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5482cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5582cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5682cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5782cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5882cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5982cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6082cd038dSYoshinobu Inoue * SUCH DAMAGE. 6182cd038dSYoshinobu Inoue * 6282cd038dSYoshinobu Inoue * @(#)ip_output.c 8.3 (Berkeley) 1/21/94 6382cd038dSYoshinobu Inoue */ 6482cd038dSYoshinobu Inoue 65b48287a3SDavid E. O'Brien #include <sys/cdefs.h> 66b48287a3SDavid E. O'Brien __FBSDID("$FreeBSD$"); 67b48287a3SDavid E. O'Brien 68686cdd19SJun-ichiro itojun Hagino #include "opt_inet.h" 69686cdd19SJun-ichiro itojun Hagino #include "opt_inet6.h" 70686cdd19SJun-ichiro itojun Hagino #include "opt_ipsec.h" 71b2e60773SJohn Baldwin #include "opt_kern_tls.h" 7277a01441SJohn Baldwin #include "opt_ratelimit.h" 7377931dd5SKip Macy #include "opt_route.h" 74c7c0d948SAdrian Chadd #include "opt_rss.h" 7577a01441SJohn Baldwin #include "opt_sctp.h" 7682cd038dSYoshinobu Inoue 7782cd038dSYoshinobu Inoue #include <sys/param.h> 78c26fe973SBjoern A. Zeeb #include <sys/kernel.h> 79b2e60773SJohn Baldwin #include <sys/ktls.h> 8082cd038dSYoshinobu Inoue #include <sys/malloc.h> 8182cd038dSYoshinobu Inoue #include <sys/mbuf.h> 8282cd038dSYoshinobu Inoue #include <sys/errno.h> 83c2259ba4SRobert Watson #include <sys/priv.h> 84c26fe973SBjoern A. Zeeb #include <sys/proc.h> 8582cd038dSYoshinobu Inoue #include <sys/protosw.h> 8682cd038dSYoshinobu Inoue #include <sys/socket.h> 8782cd038dSYoshinobu Inoue #include <sys/socketvar.h> 881263305fSBjoern A. Zeeb #include <sys/syslog.h> 89c26fe973SBjoern A. Zeeb #include <sys/ucred.h> 9082cd038dSYoshinobu Inoue 91e7b92e27SBjoern A. Zeeb #include <machine/in_cksum.h> 92e7b92e27SBjoern A. Zeeb 9382cd038dSYoshinobu Inoue #include <net/if.h> 9476039bc8SGleb Smirnoff #include <net/if_var.h> 95868aabb4SRichard Scheffenegger #include <net/if_vlan_var.h> 960f5687f2SMike Karels #include <net/if_llatbl.h> 97868aabb4SRichard Scheffenegger #include <net/ethernet.h> 988195404bSBrooks Davis #include <net/netisr.h> 9982cd038dSYoshinobu Inoue #include <net/route.h> 100983066f0SAlexander V. Chernikov #include <net/route/nhop.h> 101c4ac87eaSDarren Reed #include <net/pfil.h> 102b2bdc62aSAdrian Chadd #include <net/rss_config.h> 1034b79449eSBjoern A. Zeeb #include <net/vnet.h> 10482cd038dSYoshinobu Inoue 10582cd038dSYoshinobu Inoue #include <netinet/in.h> 10682cd038dSYoshinobu Inoue #include <netinet/in_var.h> 1078a006adbSBjoern A. Zeeb #include <netinet/ip_var.h> 108bacf6684SAlexander V. Chernikov #include <netinet6/in6_fib.h> 10933841545SHajimu UMEMOTO #include <netinet6/in6_var.h> 110686cdd19SJun-ichiro itojun Hagino #include <netinet/ip6.h> 111686cdd19SJun-ichiro itojun Hagino #include <netinet/icmp6.h> 11282cd038dSYoshinobu Inoue #include <netinet6/ip6_var.h> 113686cdd19SJun-ichiro itojun Hagino #include <netinet/in_pcb.h> 11497d8d152SAndre Oppermann #include <netinet/tcp_var.h> 11582cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 116b2bdc62aSAdrian Chadd #include <netinet6/in6_rss.h> 11782cd038dSYoshinobu Inoue 118fcf59617SAndrey V. Elsukov #include <netipsec/ipsec_support.h> 11995033af9SMark Johnston #if defined(SCTP) || defined(SCTP_SUPPORT) 1209b03990aSRandall Stewart #include <netinet/sctp.h> 1219b03990aSRandall Stewart #include <netinet/sctp_crc32.h> 1229b03990aSRandall Stewart #endif 123b9234fafSSam Leffler 124a1f7e5f8SHajimu UMEMOTO #include <netinet6/scope6_var.h> 1251469c434SHajimu UMEMOTO 12633cde130SBruce M Simpson extern int in6_mcast_loop; 12782cd038dSYoshinobu Inoue 12882cd038dSYoshinobu Inoue struct ip6_exthdrs { 12982cd038dSYoshinobu Inoue struct mbuf *ip6e_ip6; 13082cd038dSYoshinobu Inoue struct mbuf *ip6e_hbh; 13182cd038dSYoshinobu Inoue struct mbuf *ip6e_dest1; 13282cd038dSYoshinobu Inoue struct mbuf *ip6e_rthdr; 13382cd038dSYoshinobu Inoue struct mbuf *ip6e_dest2; 13482cd038dSYoshinobu Inoue }; 13582cd038dSYoshinobu Inoue 1365e0a6f31SMark Johnston static MALLOC_DEFINE(M_IP6OPT, "ip6opt", "IPv6 options"); 1375e0a6f31SMark Johnston 1386f56329aSXin LI static int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **, 1396f56329aSXin LI struct ucred *, int); 1406f56329aSXin LI static int ip6_pcbopts(struct ip6_pktopts **, struct mbuf *, 1416f56329aSXin LI struct socket *, struct sockopt *); 14206b479a6SSean Bruno static int ip6_getpcbopt(struct inpcb *, int, struct sockopt *); 1436f56329aSXin LI static int ip6_setpktopt(int, u_char *, int, struct ip6_pktopts *, 1446f56329aSXin LI struct ucred *, int, int, int); 145f95d4633SHajimu UMEMOTO 1469233d8f3SDavid E. O'Brien static int ip6_copyexthdr(struct mbuf **, caddr_t, int); 1476f56329aSXin LI static int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int, 1486f56329aSXin LI struct ip6_frag **); 1499233d8f3SDavid E. O'Brien static int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t); 1509233d8f3SDavid E. O'Brien static int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *); 1510d4df029SAlexander V. Chernikov static int ip6_getpmtu(struct route_in6 *, int, 152d4c22202SAndrew Gallatin struct ifnet *, const struct in6_addr *, u_long *, int *, u_int, 153d4c22202SAndrew Gallatin u_int); 1540d4df029SAlexander V. Chernikov static int ip6_calcmtu(struct ifnet *, const struct in6_addr *, u_long, 155d4c22202SAndrew Gallatin u_long *, int *, u_int); 156f0937b2cSAndrey V. Elsukov static int ip6_getpmtu_ctl(u_int, const struct in6_addr *, u_long *); 1579233d8f3SDavid E. O'Brien static int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *, int); 15882cd038dSYoshinobu Inoue 15982cd038dSYoshinobu Inoue /* 160a1a6c01eSBjoern A. Zeeb * Make an extension header from option data. hp is the source, 161a1a6c01eSBjoern A. Zeeb * mp is the destination, and _ol is the optlen. 1622cb64cb2SGeorge V. Neville-Neil */ 163a1a6c01eSBjoern A. Zeeb #define MAKE_EXTHDR(hp, mp, _ol) \ 1642cb64cb2SGeorge V. Neville-Neil do { \ 1652cb64cb2SGeorge V. Neville-Neil if (hp) { \ 1662cb64cb2SGeorge V. Neville-Neil struct ip6_ext *eh = (struct ip6_ext *)(hp); \ 1672cb64cb2SGeorge V. Neville-Neil error = ip6_copyexthdr((mp), (caddr_t)(hp), \ 1682cb64cb2SGeorge V. Neville-Neil ((eh)->ip6e_len + 1) << 3); \ 1692cb64cb2SGeorge V. Neville-Neil if (error) \ 1702cb64cb2SGeorge V. Neville-Neil goto freehdrs; \ 171a1a6c01eSBjoern A. Zeeb (_ol) += (*(mp))->m_len; \ 1722cb64cb2SGeorge V. Neville-Neil } \ 1732cb64cb2SGeorge V. Neville-Neil } while (/*CONSTCOND*/ 0) 1742cb64cb2SGeorge V. Neville-Neil 1752cb64cb2SGeorge V. Neville-Neil /* 1762cb64cb2SGeorge V. Neville-Neil * Form a chain of extension headers. 1772cb64cb2SGeorge V. Neville-Neil * m is the extension header mbuf 1782cb64cb2SGeorge V. Neville-Neil * mp is the previous mbuf in the chain 1792cb64cb2SGeorge V. Neville-Neil * p is the next header 1802cb64cb2SGeorge V. Neville-Neil * i is the type of option. 1812cb64cb2SGeorge V. Neville-Neil */ 1822cb64cb2SGeorge V. Neville-Neil #define MAKE_CHAIN(m, mp, p, i)\ 1832cb64cb2SGeorge V. Neville-Neil do {\ 1842cb64cb2SGeorge V. Neville-Neil if (m) {\ 1852cb64cb2SGeorge V. Neville-Neil if (!hdrsplit) \ 1867c1daefeSBjoern A. Zeeb panic("%s:%d: assumption failed: "\ 1877c1daefeSBjoern A. Zeeb "hdr not split: hdrsplit %d exthdrs %p",\ 1887c1daefeSBjoern A. Zeeb __func__, __LINE__, hdrsplit, &exthdrs);\ 1892cb64cb2SGeorge V. Neville-Neil *mtod((m), u_char *) = *(p);\ 1902cb64cb2SGeorge V. Neville-Neil *(p) = (i);\ 1912cb64cb2SGeorge V. Neville-Neil p = mtod((m), u_char *);\ 1922cb64cb2SGeorge V. Neville-Neil (m)->m_next = (mp)->m_next;\ 1932cb64cb2SGeorge V. Neville-Neil (mp)->m_next = (m);\ 1942cb64cb2SGeorge V. Neville-Neil (mp) = (m);\ 1952cb64cb2SGeorge V. Neville-Neil }\ 1962cb64cb2SGeorge V. Neville-Neil } while (/*CONSTCOND*/ 0) 1972cb64cb2SGeorge V. Neville-Neil 198aaf2cfc0SVANHULLEBUS Yvan void 199e7b92e27SBjoern A. Zeeb in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset) 200e7b92e27SBjoern A. Zeeb { 201e7b92e27SBjoern A. Zeeb u_short csum; 202e7b92e27SBjoern A. Zeeb 203c69baa7eSBjoern A. Zeeb csum = in_cksum_skip(m, offset + plen, offset); 204356ab07eSBjoern A. Zeeb if (m->m_pkthdr.csum_flags & CSUM_UDP_IPV6 && csum == 0) 205e7b92e27SBjoern A. Zeeb csum = 0xffff; 206e7b92e27SBjoern A. Zeeb offset += m->m_pkthdr.csum_data; /* checksum offset */ 207e7b92e27SBjoern A. Zeeb 2084a089e6bSAndrey V. Elsukov if (offset + sizeof(csum) > m->m_len) 2094a089e6bSAndrey V. Elsukov m_copyback(m, offset, sizeof(csum), (caddr_t)&csum); 2104a089e6bSAndrey V. Elsukov else 2114a089e6bSAndrey V. Elsukov *(u_short *)mtodo(m, offset) = csum; 212e7b92e27SBjoern A. Zeeb } 213e7b92e27SBjoern A. Zeeb 21444775b16SMark Johnston static void 2153459050cSBjoern A. Zeeb ip6_output_delayed_csum(struct mbuf *m, struct ifnet *ifp, int csum_flags, 21644775b16SMark Johnston int plen, int optlen) 2173459050cSBjoern A. Zeeb { 2183459050cSBjoern A. Zeeb 2193459050cSBjoern A. Zeeb KASSERT((plen >= optlen), ("%s:%d: plen %d < optlen %d, m %p, ifp %p " 22044775b16SMark Johnston "csum_flags %#x", 22144775b16SMark Johnston __func__, __LINE__, plen, optlen, m, ifp, csum_flags)); 2223459050cSBjoern A. Zeeb 2233459050cSBjoern A. Zeeb if (csum_flags & CSUM_DELAY_DATA_IPV6) { 2243459050cSBjoern A. Zeeb in6_delayed_cksum(m, plen - optlen, 2253459050cSBjoern A. Zeeb sizeof(struct ip6_hdr) + optlen); 2263459050cSBjoern A. Zeeb m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA_IPV6; 2273459050cSBjoern A. Zeeb } 22895033af9SMark Johnston #if defined(SCTP) || defined(SCTP_SUPPORT) 2293459050cSBjoern A. Zeeb if (csum_flags & CSUM_SCTP_IPV6) { 2303459050cSBjoern A. Zeeb sctp_delayed_cksum(m, sizeof(struct ip6_hdr) + optlen); 2313459050cSBjoern A. Zeeb m->m_pkthdr.csum_flags &= ~CSUM_SCTP_IPV6; 2323459050cSBjoern A. Zeeb } 2333459050cSBjoern A. Zeeb #endif 2343459050cSBjoern A. Zeeb } 2353459050cSBjoern A. Zeeb 2366c269f69SGleb Smirnoff int 2376c269f69SGleb Smirnoff ip6_fragment(struct ifnet *ifp, struct mbuf *m0, int hlen, u_char nextproto, 238d78c0804SKristof Provost int fraglen , uint32_t id) 2396c269f69SGleb Smirnoff { 2406c269f69SGleb Smirnoff struct mbuf *m, **mnext, *m_frgpart; 2416c269f69SGleb Smirnoff struct ip6_hdr *ip6, *mhip6; 2426c269f69SGleb Smirnoff struct ip6_frag *ip6f; 2436c269f69SGleb Smirnoff int off; 2446c269f69SGleb Smirnoff int error; 2456c269f69SGleb Smirnoff int tlen = m0->m_pkthdr.len; 2466c269f69SGleb Smirnoff 247d78c0804SKristof Provost KASSERT((fraglen % 8 == 0), ("Fragment length must be a multiple of 8")); 24800eab743SKristof Provost 2496c269f69SGleb Smirnoff m = m0; 2506c269f69SGleb Smirnoff ip6 = mtod(m, struct ip6_hdr *); 2516c269f69SGleb Smirnoff mnext = &m->m_nextpkt; 2526c269f69SGleb Smirnoff 253d78c0804SKristof Provost for (off = hlen; off < tlen; off += fraglen) { 2546c269f69SGleb Smirnoff m = m_gethdr(M_NOWAIT, MT_DATA); 2556c269f69SGleb Smirnoff if (!m) { 2566c269f69SGleb Smirnoff IP6STAT_INC(ip6s_odropped); 2576c269f69SGleb Smirnoff return (ENOBUFS); 2586c269f69SGleb Smirnoff } 259c9d33708SJohn Baldwin 260c9d33708SJohn Baldwin /* 261c9d33708SJohn Baldwin * Make sure the complete packet header gets copied 262c9d33708SJohn Baldwin * from the originating mbuf to the newly created 263c9d33708SJohn Baldwin * mbuf. This also ensures that existing firewall 264c9d33708SJohn Baldwin * classification(s), VLAN tags and so on get copied 265c9d33708SJohn Baldwin * to the resulting fragmented packet(s): 266c9d33708SJohn Baldwin */ 267c9d33708SJohn Baldwin if (m_dup_pkthdr(m, m0, M_NOWAIT) == 0) { 268c9d33708SJohn Baldwin m_free(m); 269c9d33708SJohn Baldwin IP6STAT_INC(ip6s_odropped); 270c9d33708SJohn Baldwin return (ENOBUFS); 271c9d33708SJohn Baldwin } 272c9d33708SJohn Baldwin 2736c269f69SGleb Smirnoff *mnext = m; 2746c269f69SGleb Smirnoff mnext = &m->m_nextpkt; 2756c269f69SGleb Smirnoff m->m_data += max_linkhdr; 2766c269f69SGleb Smirnoff mhip6 = mtod(m, struct ip6_hdr *); 2776c269f69SGleb Smirnoff *mhip6 = *ip6; 2786c269f69SGleb Smirnoff m->m_len = sizeof(*mhip6); 2796c269f69SGleb Smirnoff error = ip6_insertfraghdr(m0, m, hlen, &ip6f); 2806c269f69SGleb Smirnoff if (error) { 2816c269f69SGleb Smirnoff IP6STAT_INC(ip6s_odropped); 2826c269f69SGleb Smirnoff return (error); 2836c269f69SGleb Smirnoff } 2846c269f69SGleb Smirnoff ip6f->ip6f_offlg = htons((u_short)((off - hlen) & ~7)); 285d78c0804SKristof Provost if (off + fraglen >= tlen) 286d78c0804SKristof Provost fraglen = tlen - off; 2876c269f69SGleb Smirnoff else 2886c269f69SGleb Smirnoff ip6f->ip6f_offlg |= IP6F_MORE_FRAG; 289d78c0804SKristof Provost mhip6->ip6_plen = htons((u_short)(fraglen + hlen + 2906c269f69SGleb Smirnoff sizeof(*ip6f) - sizeof(struct ip6_hdr))); 291d78c0804SKristof Provost if ((m_frgpart = m_copym(m0, off, fraglen, M_NOWAIT)) == NULL) { 2926c269f69SGleb Smirnoff IP6STAT_INC(ip6s_odropped); 2936c269f69SGleb Smirnoff return (ENOBUFS); 2946c269f69SGleb Smirnoff } 2956c269f69SGleb Smirnoff m_cat(m, m_frgpart); 296d78c0804SKristof Provost m->m_pkthdr.len = fraglen + hlen + sizeof(*ip6f); 2976c269f69SGleb Smirnoff ip6f->ip6f_reserved = 0; 2986c269f69SGleb Smirnoff ip6f->ip6f_ident = id; 2996c269f69SGleb Smirnoff ip6f->ip6f_nxt = nextproto; 3006c269f69SGleb Smirnoff IP6STAT_INC(ip6s_ofragments); 3016c269f69SGleb Smirnoff in6_ifstat_inc(ifp, ifs6_out_fragcreat); 3026c269f69SGleb Smirnoff } 3036c269f69SGleb Smirnoff 3046c269f69SGleb Smirnoff return (0); 3056c269f69SGleb Smirnoff } 3066c269f69SGleb Smirnoff 307fb3bc596SJohn Baldwin static int 308fb3bc596SJohn Baldwin ip6_output_send(struct inpcb *inp, struct ifnet *ifp, struct ifnet *origifp, 309d7452d89SAndrew Gallatin struct mbuf *m, struct sockaddr_in6 *dst, struct route_in6 *ro, 310d7452d89SAndrew Gallatin bool stamp_tag) 311fb3bc596SJohn Baldwin { 312b2e60773SJohn Baldwin #ifdef KERN_TLS 313b2e60773SJohn Baldwin struct ktls_session *tls = NULL; 314b2e60773SJohn Baldwin #endif 315fb3bc596SJohn Baldwin struct m_snd_tag *mst; 316fb3bc596SJohn Baldwin int error; 317fb3bc596SJohn Baldwin 318fb3bc596SJohn Baldwin MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 319fb3bc596SJohn Baldwin mst = NULL; 320fb3bc596SJohn Baldwin 321b2e60773SJohn Baldwin #ifdef KERN_TLS 322b2e60773SJohn Baldwin /* 323b2e60773SJohn Baldwin * If this is an unencrypted TLS record, save a reference to 324b2e60773SJohn Baldwin * the record. This local reference is used to call 325b2e60773SJohn Baldwin * ktls_output_eagain after the mbuf has been freed (thus 326b2e60773SJohn Baldwin * dropping the mbuf's reference) in if_output. 327b2e60773SJohn Baldwin */ 328b2e60773SJohn Baldwin if (m->m_next != NULL && mbuf_has_tls_session(m->m_next)) { 3297b6c99d0SGleb Smirnoff tls = ktls_hold(m->m_next->m_epg_tls); 330b2e60773SJohn Baldwin mst = tls->snd_tag; 331b2e60773SJohn Baldwin 332b2e60773SJohn Baldwin /* 333b2e60773SJohn Baldwin * If a TLS session doesn't have a valid tag, it must 334b2e60773SJohn Baldwin * have had an earlier ifp mismatch, so drop this 335b2e60773SJohn Baldwin * packet. 336b2e60773SJohn Baldwin */ 337b2e60773SJohn Baldwin if (mst == NULL) { 3389ba11796SAndrew Gallatin m_freem(m); 339b2e60773SJohn Baldwin error = EAGAIN; 340b2e60773SJohn Baldwin goto done; 341b2e60773SJohn Baldwin } 342d7452d89SAndrew Gallatin /* 343d7452d89SAndrew Gallatin * Always stamp tags that include NIC ktls. 344d7452d89SAndrew Gallatin */ 345d7452d89SAndrew Gallatin stamp_tag = true; 346b2e60773SJohn Baldwin } 347b2e60773SJohn Baldwin #endif 348fb3bc596SJohn Baldwin #ifdef RATELIMIT 349b2e60773SJohn Baldwin if (inp != NULL && mst == NULL) { 350fb3bc596SJohn Baldwin if ((inp->inp_flags2 & INP_RATE_LIMIT_CHANGED) != 0 || 351fb3bc596SJohn Baldwin (inp->inp_snd_tag != NULL && 352fb3bc596SJohn Baldwin inp->inp_snd_tag->ifp != ifp)) 353fb3bc596SJohn Baldwin in_pcboutput_txrtlmt(inp, ifp, m); 354fb3bc596SJohn Baldwin 355fb3bc596SJohn Baldwin if (inp->inp_snd_tag != NULL) 356fb3bc596SJohn Baldwin mst = inp->inp_snd_tag; 357fb3bc596SJohn Baldwin } 358fb3bc596SJohn Baldwin #endif 359d7452d89SAndrew Gallatin if (stamp_tag && mst != NULL) { 360fb3bc596SJohn Baldwin KASSERT(m->m_pkthdr.rcvif == NULL, 361fb3bc596SJohn Baldwin ("trying to add a send tag to a forwarded packet")); 362fb3bc596SJohn Baldwin if (mst->ifp != ifp) { 3639ba11796SAndrew Gallatin m_freem(m); 364fb3bc596SJohn Baldwin error = EAGAIN; 365fb3bc596SJohn Baldwin goto done; 366fb3bc596SJohn Baldwin } 367fb3bc596SJohn Baldwin 368fb3bc596SJohn Baldwin /* stamp send tag on mbuf */ 369fb3bc596SJohn Baldwin m->m_pkthdr.snd_tag = m_snd_tag_ref(mst); 370fb3bc596SJohn Baldwin m->m_pkthdr.csum_flags |= CSUM_SND_TAG; 371fb3bc596SJohn Baldwin } 372fb3bc596SJohn Baldwin 373fb3bc596SJohn Baldwin error = nd6_output_ifp(ifp, origifp, m, dst, (struct route *)ro); 374fb3bc596SJohn Baldwin 375fb3bc596SJohn Baldwin done: 376fb3bc596SJohn Baldwin /* Check for route change invalidating send tags. */ 377b2e60773SJohn Baldwin #ifdef KERN_TLS 378b2e60773SJohn Baldwin if (tls != NULL) { 379b2e60773SJohn Baldwin if (error == EAGAIN) 380b2e60773SJohn Baldwin error = ktls_output_eagain(inp, tls); 381b2e60773SJohn Baldwin ktls_free(tls); 382b2e60773SJohn Baldwin } 383b2e60773SJohn Baldwin #endif 384fb3bc596SJohn Baldwin #ifdef RATELIMIT 385fb3bc596SJohn Baldwin if (error == EAGAIN) 386fb3bc596SJohn Baldwin in_pcboutput_eagain(inp); 387fb3bc596SJohn Baldwin #endif 388fb3bc596SJohn Baldwin return (error); 389fb3bc596SJohn Baldwin } 390fb3bc596SJohn Baldwin 3912cb64cb2SGeorge V. Neville-Neil /* 3927c1daefeSBjoern A. Zeeb * IP6 output. 3937c1daefeSBjoern A. Zeeb * The packet in mbuf chain m contains a skeletal IP6 header (with pri, len, 3947c1daefeSBjoern A. Zeeb * nxt, hlim, src, dst). 39582cd038dSYoshinobu Inoue * This function may modify ver and hlim only. 39682cd038dSYoshinobu Inoue * The mbuf chain containing the packet will be freed. 39782cd038dSYoshinobu Inoue * The mbuf opt, if present, will not be freed. 398983066f0SAlexander V. Chernikov * If route_in6 ro is present and has ro_nh initialized, route lookup would be 399983066f0SAlexander V. Chernikov * skipped and ro->ro_nh would be used. If ro is present but ro->ro_nh is NULL, 400983066f0SAlexander V. Chernikov * then result of route lookup is stored in ro->ro_nh. 40133841545SHajimu UMEMOTO * 4027c1daefeSBjoern A. Zeeb * Type of "mtu": rt_mtu is u_long, ifnet.ifr_mtu is int, and nd_ifinfo.linkmtu 4037c1daefeSBjoern A. Zeeb * is uint32_t. So we use u_long to hold largest one, which is rt_mtu. 4041272577eSXin LI * 4051272577eSXin LI * ifpp - XXX: just for statistics 40682cd038dSYoshinobu Inoue */ 40782cd038dSYoshinobu Inoue int 4081272577eSXin LI ip6_output(struct mbuf *m0, struct ip6_pktopts *opt, 4091272577eSXin LI struct route_in6 *ro, int flags, struct ip6_moptions *im6o, 4101272577eSXin LI struct ifnet **ifpp, struct inpcb *inp) 41182cd038dSYoshinobu Inoue { 4126c269f69SGleb Smirnoff struct ip6_hdr *ip6; 413686cdd19SJun-ichiro itojun Hagino struct ifnet *ifp, *origifp; 41482cd038dSYoshinobu Inoue struct mbuf *m = m0; 415a1a6c01eSBjoern A. Zeeb struct mbuf *mprev; 416000c42faSBjoern A. Zeeb struct route_in6 *ro_pmtu; 417983066f0SAlexander V. Chernikov struct nhop_object *nh; 418000c42faSBjoern A. Zeeb struct sockaddr_in6 *dst, sin6, src_sa, dst_sa; 4198195404bSBrooks Davis struct in6_addr odst; 420a1a6c01eSBjoern A. Zeeb u_char *nexthdrp; 421000c42faSBjoern A. Zeeb int tlen, len; 42282cd038dSYoshinobu Inoue int error = 0; 423868aabb4SRichard Scheffenegger int vlan_pcp = -1; 4245da9f8faSJosef Karthauser struct in6_ifaddr *ia = NULL; 42582cd038dSYoshinobu Inoue u_long mtu; 426f95d4633SHajimu UMEMOTO int alwaysfrag, dontfrag; 427a1a6c01eSBjoern A. Zeeb u_int32_t optlen, plen = 0, unfragpartlen; 42882cd038dSYoshinobu Inoue struct ip6_exthdrs exthdrs; 429f0937b2cSAndrey V. Elsukov struct in6_addr src0, dst0; 430a1f7e5f8SHajimu UMEMOTO u_int32_t zone; 431a1a6c01eSBjoern A. Zeeb bool hdrsplit; 432e7b92e27SBjoern A. Zeeb int sw_csum, tso; 4339c57a5b6SHiroki Sato int needfiblookup; 4349c57a5b6SHiroki Sato uint32_t fibnum; 435f8fe3dc9SAndrey V. Elsukov struct m_tag *fwd_tag = NULL; 43679831849SKristof Provost uint32_t id; 437b9234fafSSam Leffler 438b9555453SGleb Smirnoff NET_EPOCH_ASSERT(); 4391e4f4e56SGleb Smirnoff 440b174de32SAdrian Chadd if (inp != NULL) { 441ce9ac139SNavdeep Parhar INP_LOCK_ASSERT(inp); 44281d5d46bSBjoern A. Zeeb M_SETFIB(m, inp->inp_inc.inc_fibnum); 443c2529042SHans Petter Selasky if ((flags & IP_NODEFAULTFLOWID) == 0) { 4447c1daefeSBjoern A. Zeeb /* Unconditionally set flowid. */ 445b174de32SAdrian Chadd m->m_pkthdr.flowid = inp->inp_flowid; 446c2529042SHans Petter Selasky M_HASHTYPE_SET(m, inp->inp_flowtype); 447b174de32SAdrian Chadd } 448868aabb4SRichard Scheffenegger if ((inp->inp_flags2 & INP_2PCP_SET) != 0) 449868aabb4SRichard Scheffenegger vlan_pcp = (inp->inp_flags2 & INP_2PCP_MASK) >> 450868aabb4SRichard Scheffenegger INP_2PCP_SHIFT; 45150575ce1SAndrew Gallatin #ifdef NUMA 45250575ce1SAndrew Gallatin m->m_pkthdr.numa_domain = inp->inp_numa_domain; 45350575ce1SAndrew Gallatin #endif 454b174de32SAdrian Chadd } 45581d5d46bSBjoern A. Zeeb 456fcf59617SAndrey V. Elsukov #if defined(IPSEC) || defined(IPSEC_SUPPORT) 457fcf59617SAndrey V. Elsukov /* 458fcf59617SAndrey V. Elsukov * IPSec checking which handles several cases. 459fcf59617SAndrey V. Elsukov * FAST IPSEC: We re-injected the packet. 460fcf59617SAndrey V. Elsukov * XXX: need scope argument. 461fcf59617SAndrey V. Elsukov */ 462fcf59617SAndrey V. Elsukov if (IPSEC_ENABLED(ipv6)) { 463fcf59617SAndrey V. Elsukov if ((error = IPSEC_OUTPUT(ipv6, m, inp)) != 0) { 464fcf59617SAndrey V. Elsukov if (error == EINPROGRESS) 465fcf59617SAndrey V. Elsukov error = 0; 466fcf59617SAndrey V. Elsukov goto done; 467fcf59617SAndrey V. Elsukov } 468fcf59617SAndrey V. Elsukov } 469fcf59617SAndrey V. Elsukov #endif /* IPSEC */ 470fcf59617SAndrey V. Elsukov 471a1a6c01eSBjoern A. Zeeb /* Source address validation. */ 472a1a6c01eSBjoern A. Zeeb ip6 = mtod(m, struct ip6_hdr *); 473a1a6c01eSBjoern A. Zeeb if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src) && 474a1a6c01eSBjoern A. Zeeb (flags & IPV6_UNSPECSRC) == 0) { 475a1a6c01eSBjoern A. Zeeb error = EOPNOTSUPP; 476a1a6c01eSBjoern A. Zeeb IP6STAT_INC(ip6s_badscope); 477a1a6c01eSBjoern A. Zeeb goto bad; 478a1a6c01eSBjoern A. Zeeb } 479a1a6c01eSBjoern A. Zeeb if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)) { 480a1a6c01eSBjoern A. Zeeb error = EOPNOTSUPP; 481a1a6c01eSBjoern A. Zeeb IP6STAT_INC(ip6s_badscope); 482a1a6c01eSBjoern A. Zeeb goto bad; 483a1a6c01eSBjoern A. Zeeb } 484a1a6c01eSBjoern A. Zeeb 485a1a6c01eSBjoern A. Zeeb /* 486a1a6c01eSBjoern A. Zeeb * If we are given packet options to add extension headers prepare them. 487a1a6c01eSBjoern A. Zeeb * Calculate the total length of the extension header chain. 488a1a6c01eSBjoern A. Zeeb * Keep the length of the unfragmentable part for fragmentation. 489a1a6c01eSBjoern A. Zeeb */ 49082cd038dSYoshinobu Inoue bzero(&exthdrs, sizeof(exthdrs)); 491a1a6c01eSBjoern A. Zeeb optlen = 0; 4923db60531SBjoern A. Zeeb unfragpartlen = sizeof(struct ip6_hdr); 49382cd038dSYoshinobu Inoue if (opt) { 4947c1daefeSBjoern A. Zeeb /* Hop-by-Hop options header. */ 495a1a6c01eSBjoern A. Zeeb MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh, optlen); 496a1a6c01eSBjoern A. Zeeb 4977c1daefeSBjoern A. Zeeb /* Destination options header (1st part). */ 49829bc2c48SHajimu UMEMOTO if (opt->ip6po_rthdr) { 499a1a6c01eSBjoern A. Zeeb #ifndef RTHDR_SUPPORT_IMPLEMENTED 500a1a6c01eSBjoern A. Zeeb /* 501a1a6c01eSBjoern A. Zeeb * If there is a routing header, discard the packet 502a1a6c01eSBjoern A. Zeeb * right away here. RH0/1 are obsolete and we do not 503a1a6c01eSBjoern A. Zeeb * currently support RH2/3/4. 504a1a6c01eSBjoern A. Zeeb * People trying to use RH253/254 may want to disable 505a1a6c01eSBjoern A. Zeeb * this check. 506a1a6c01eSBjoern A. Zeeb * The moment we do support any routing header (again) 507a1a6c01eSBjoern A. Zeeb * this block should check the routing type more 508a1a6c01eSBjoern A. Zeeb * selectively. 509a1a6c01eSBjoern A. Zeeb */ 510a1a6c01eSBjoern A. Zeeb error = EINVAL; 511a1a6c01eSBjoern A. Zeeb goto bad; 512a1a6c01eSBjoern A. Zeeb #endif 513a1a6c01eSBjoern A. Zeeb 51429bc2c48SHajimu UMEMOTO /* 5157c1daefeSBjoern A. Zeeb * Destination options header (1st part). 5162cb64cb2SGeorge V. Neville-Neil * This only makes sense with a routing header. 51729bc2c48SHajimu UMEMOTO * See Section 9.2 of RFC 3542. 51829bc2c48SHajimu UMEMOTO * Disabling this part just for MIP6 convenience is 51929bc2c48SHajimu UMEMOTO * a bad idea. We need to think carefully about a 52029bc2c48SHajimu UMEMOTO * way to make the advanced API coexist with MIP6 52129bc2c48SHajimu UMEMOTO * options, which might automatically be inserted in 52229bc2c48SHajimu UMEMOTO * the kernel. 52329bc2c48SHajimu UMEMOTO */ 524a1a6c01eSBjoern A. Zeeb MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1, 525a1a6c01eSBjoern A. Zeeb optlen); 52629bc2c48SHajimu UMEMOTO } 5277c1daefeSBjoern A. Zeeb /* Routing header. */ 528a1a6c01eSBjoern A. Zeeb MAKE_EXTHDR(opt->ip6po_rthdr, &exthdrs.ip6e_rthdr, optlen); 52982cd038dSYoshinobu Inoue 5303db60531SBjoern A. Zeeb unfragpartlen += optlen; 5312cb64cb2SGeorge V. Neville-Neil 532a1a6c01eSBjoern A. Zeeb /* 533a1a6c01eSBjoern A. Zeeb * NOTE: we don't add AH/ESP length here (done in 534a1a6c01eSBjoern A. Zeeb * ip6_ipsec_output()). 535a1a6c01eSBjoern A. Zeeb */ 536a1a6c01eSBjoern A. Zeeb 537a1a6c01eSBjoern A. Zeeb /* Destination options header (2nd part). */ 538a1a6c01eSBjoern A. Zeeb MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2, optlen); 539a1a6c01eSBjoern A. Zeeb } 54082cd038dSYoshinobu Inoue 54182cd038dSYoshinobu Inoue /* 542aaf2cfc0SVANHULLEBUS Yvan * If there is at least one extension header, 54382cd038dSYoshinobu Inoue * separate IP6 header from the payload. 54482cd038dSYoshinobu Inoue */ 545a1a6c01eSBjoern A. Zeeb hdrsplit = false; 546a1a6c01eSBjoern A. Zeeb if (optlen) { 54782cd038dSYoshinobu Inoue if ((error = ip6_splithdr(m, &exthdrs)) != 0) { 54882cd038dSYoshinobu Inoue m = NULL; 54982cd038dSYoshinobu Inoue goto freehdrs; 55082cd038dSYoshinobu Inoue } 55182cd038dSYoshinobu Inoue m = exthdrs.ip6e_ip6; 55282cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 553a1a6c01eSBjoern A. Zeeb hdrsplit = true; 554a1a6c01eSBjoern A. Zeeb } 55582cd038dSYoshinobu Inoue 5567c1daefeSBjoern A. Zeeb /* Adjust mbuf packet header length. */ 55782cd038dSYoshinobu Inoue m->m_pkthdr.len += optlen; 55882cd038dSYoshinobu Inoue plen = m->m_pkthdr.len - sizeof(*ip6); 55982cd038dSYoshinobu Inoue 56082cd038dSYoshinobu Inoue /* If this is a jumbo payload, insert a jumbo payload option. */ 56182cd038dSYoshinobu Inoue if (plen > IPV6_MAXPACKET) { 56282cd038dSYoshinobu Inoue if (!hdrsplit) { 56382cd038dSYoshinobu Inoue if ((error = ip6_splithdr(m, &exthdrs)) != 0) { 56482cd038dSYoshinobu Inoue m = NULL; 56582cd038dSYoshinobu Inoue goto freehdrs; 56682cd038dSYoshinobu Inoue } 56782cd038dSYoshinobu Inoue m = exthdrs.ip6e_ip6; 56882cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 569a1a6c01eSBjoern A. Zeeb hdrsplit = true; 570a1a6c01eSBjoern A. Zeeb } 57182cd038dSYoshinobu Inoue if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0) 57282cd038dSYoshinobu Inoue goto freehdrs; 57382cd038dSYoshinobu Inoue ip6->ip6_plen = 0; 57482cd038dSYoshinobu Inoue } else 57582cd038dSYoshinobu Inoue ip6->ip6_plen = htons(plen); 576a1a6c01eSBjoern A. Zeeb nexthdrp = &ip6->ip6_nxt; 57782cd038dSYoshinobu Inoue 578a1a6c01eSBjoern A. Zeeb if (optlen) { 57982cd038dSYoshinobu Inoue /* 58082cd038dSYoshinobu Inoue * Concatenate headers and fill in next header fields. 58182cd038dSYoshinobu Inoue * Here we have, on "m" 58282cd038dSYoshinobu Inoue * IPv6 payload 5837c1daefeSBjoern A. Zeeb * and we insert headers accordingly. 5847c1daefeSBjoern A. Zeeb * Finally, we should be getting: 5857c1daefeSBjoern A. Zeeb * IPv6 hbh dest1 rthdr ah* [esp* dest2 payload]. 58682cd038dSYoshinobu Inoue * 5877c1daefeSBjoern A. Zeeb * During the header composing process "m" points to IPv6 5887c1daefeSBjoern A. Zeeb * header. "mprev" points to an extension header prior to esp. 58982cd038dSYoshinobu Inoue */ 5902cb64cb2SGeorge V. Neville-Neil mprev = m; 59182cd038dSYoshinobu Inoue 59282cd038dSYoshinobu Inoue /* 5937c1daefeSBjoern A. Zeeb * We treat dest2 specially. This makes IPsec processing 5947c1daefeSBjoern A. Zeeb * much easier. The goal here is to make mprev point the 59588ff5695SSUZUKI Shinsuke * mbuf prior to dest2. 59682cd038dSYoshinobu Inoue * 5977c1daefeSBjoern A. Zeeb * Result: IPv6 dest2 payload. 59882cd038dSYoshinobu Inoue * m and mprev will point to IPv6 header. 59982cd038dSYoshinobu Inoue */ 60082cd038dSYoshinobu Inoue if (exthdrs.ip6e_dest2) { 60182cd038dSYoshinobu Inoue if (!hdrsplit) 6027c1daefeSBjoern A. Zeeb panic("%s:%d: assumption failed: " 6037c1daefeSBjoern A. Zeeb "hdr not split: hdrsplit %d exthdrs %p", 6047c1daefeSBjoern A. Zeeb __func__, __LINE__, hdrsplit, &exthdrs); 60582cd038dSYoshinobu Inoue exthdrs.ip6e_dest2->m_next = m->m_next; 60682cd038dSYoshinobu Inoue m->m_next = exthdrs.ip6e_dest2; 60782cd038dSYoshinobu Inoue *mtod(exthdrs.ip6e_dest2, u_char *) = ip6->ip6_nxt; 60882cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_DSTOPTS; 60982cd038dSYoshinobu Inoue } 61082cd038dSYoshinobu Inoue 61182cd038dSYoshinobu Inoue /* 6127c1daefeSBjoern A. Zeeb * Result: IPv6 hbh dest1 rthdr dest2 payload. 61382cd038dSYoshinobu Inoue * m will point to IPv6 header. mprev will point to the 61482cd038dSYoshinobu Inoue * extension header prior to dest2 (rthdr in the above case). 61582cd038dSYoshinobu Inoue */ 6167efe5d92SHajimu UMEMOTO MAKE_CHAIN(exthdrs.ip6e_hbh, mprev, nexthdrp, IPPROTO_HOPOPTS); 6177efe5d92SHajimu UMEMOTO MAKE_CHAIN(exthdrs.ip6e_dest1, mprev, nexthdrp, 6187efe5d92SHajimu UMEMOTO IPPROTO_DSTOPTS); 6197efe5d92SHajimu UMEMOTO MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev, nexthdrp, 6207efe5d92SHajimu UMEMOTO IPPROTO_ROUTING); 62182cd038dSYoshinobu Inoue } 62282cd038dSYoshinobu Inoue 6239cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_localout); 62482cd038dSYoshinobu Inoue 6257c1daefeSBjoern A. Zeeb /* Route packet. */ 62682cd038dSYoshinobu Inoue ro_pmtu = ro; 62782cd038dSYoshinobu Inoue if (opt && opt->ip6po_rthdr) 62882cd038dSYoshinobu Inoue ro = &opt->ip6po_route; 629000c42faSBjoern A. Zeeb if (ro != NULL) 63082cd038dSYoshinobu Inoue dst = (struct sockaddr_in6 *)&ro->ro_dst; 631000c42faSBjoern A. Zeeb else 632000c42faSBjoern A. Zeeb dst = &sin6; 6339c57a5b6SHiroki Sato fibnum = (inp != NULL) ? inp->inp_inc.inc_fibnum : M_GETFIB(m); 634000c42faSBjoern A. Zeeb 6358195404bSBrooks Davis again: 63682cd038dSYoshinobu Inoue /* 6377c1daefeSBjoern A. Zeeb * If specified, try to fill in the traffic class field. 6387c1daefeSBjoern A. Zeeb * Do not override if a non-zero value is already set. 6397c1daefeSBjoern A. Zeeb * We check the diffserv field and the ECN field separately. 640f95d4633SHajimu UMEMOTO */ 641f95d4633SHajimu UMEMOTO if (opt && opt->ip6po_tclass >= 0) { 642f95d4633SHajimu UMEMOTO int mask = 0; 643f95d4633SHajimu UMEMOTO 644bb4a7d94SKristof Provost if (IPV6_DSCP(ip6) == 0) 645f95d4633SHajimu UMEMOTO mask |= 0xfc; 646bb4a7d94SKristof Provost if (IPV6_ECN(ip6) == 0) 647f95d4633SHajimu UMEMOTO mask |= 0x03; 648f95d4633SHajimu UMEMOTO if (mask != 0) 649f95d4633SHajimu UMEMOTO ip6->ip6_flow |= htonl((opt->ip6po_tclass & mask) << 20); 650f95d4633SHajimu UMEMOTO } 651f95d4633SHajimu UMEMOTO 6527c1daefeSBjoern A. Zeeb /* Fill in or override the hop limit field, if necessary. */ 653f95d4633SHajimu UMEMOTO if (opt && opt->ip6po_hlim != -1) 654f95d4633SHajimu UMEMOTO ip6->ip6_hlim = opt->ip6po_hlim & 0xff; 655f95d4633SHajimu UMEMOTO else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 656f95d4633SHajimu UMEMOTO if (im6o != NULL) 657f95d4633SHajimu UMEMOTO ip6->ip6_hlim = im6o->im6o_multicast_hlim; 658f95d4633SHajimu UMEMOTO else 659603724d3SBjoern A. Zeeb ip6->ip6_hlim = V_ip6_defmcasthlim; 660f95d4633SHajimu UMEMOTO } 661000c42faSBjoern A. Zeeb 662983066f0SAlexander V. Chernikov if (ro == NULL || ro->ro_nh == NULL) { 663000c42faSBjoern A. Zeeb bzero(dst, sizeof(*dst)); 664000c42faSBjoern A. Zeeb dst->sin6_family = AF_INET6; 665000c42faSBjoern A. Zeeb dst->sin6_len = sizeof(*dst); 666000c42faSBjoern A. Zeeb dst->sin6_addr = ip6->ip6_dst; 667000c42faSBjoern A. Zeeb } 66884cc0778SGeorge V. Neville-Neil /* 669000c42faSBjoern A. Zeeb * Validate route against routing table changes. 6707c1daefeSBjoern A. Zeeb * Make sure that the address family is set in route. 67184cc0778SGeorge V. Neville-Neil */ 672983066f0SAlexander V. Chernikov nh = NULL; 673000c42faSBjoern A. Zeeb ifp = NULL; 674000c42faSBjoern A. Zeeb mtu = 0; 675000c42faSBjoern A. Zeeb if (ro != NULL) { 676983066f0SAlexander V. Chernikov if (ro->ro_nh != NULL && inp != NULL) { 677000c42faSBjoern A. Zeeb ro->ro_dst.sin6_family = AF_INET6; /* XXX KASSERT? */ 678983066f0SAlexander V. Chernikov NH_VALIDATE((struct route *)ro, &inp->inp_rt_cookie, 679000c42faSBjoern A. Zeeb fibnum); 68084cc0778SGeorge V. Neville-Neil } 681983066f0SAlexander V. Chernikov if (ro->ro_nh != NULL && fwd_tag == NULL && 682983066f0SAlexander V. Chernikov (!NH_IS_VALID(ro->ro_nh) || 683000c42faSBjoern A. Zeeb ro->ro_dst.sin6_family != AF_INET6 || 684000c42faSBjoern A. Zeeb !IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst))) 685000c42faSBjoern A. Zeeb RO_INVALIDATE_CACHE(ro); 686000c42faSBjoern A. Zeeb 687983066f0SAlexander V. Chernikov if (ro->ro_nh != NULL && fwd_tag == NULL && 68884cc0778SGeorge V. Neville-Neil ro->ro_dst.sin6_family == AF_INET6 && 68984cc0778SGeorge V. Neville-Neil IN6_ARE_ADDR_EQUAL(&ro->ro_dst.sin6_addr, &ip6->ip6_dst)) { 69050fa27e7SAlexander V. Chernikov /* Nexthop is valid and contains valid ifp */ 691983066f0SAlexander V. Chernikov nh = ro->ro_nh; 69216607317SAndrey V. Elsukov } else { 6930f5687f2SMike Karels if (ro->ro_lle) 6940f5687f2SMike Karels LLE_FREE(ro->ro_lle); /* zeros ro_lle */ 6950f5687f2SMike Karels ro->ro_lle = NULL; 696f8fe3dc9SAndrey V. Elsukov if (fwd_tag == NULL) { 697a1f7e5f8SHajimu UMEMOTO bzero(&dst_sa, sizeof(dst_sa)); 698a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_family = AF_INET6; 699a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_len = sizeof(dst_sa); 700a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_addr = ip6->ip6_dst; 701f8fe3dc9SAndrey V. Elsukov } 7028483fce6SBjoern A. Zeeb error = in6_selectroute(&dst_sa, opt, im6o, ro, &ifp, 703983066f0SAlexander V. Chernikov &nh, fibnum, m->m_pkthdr.flowid); 70416607317SAndrey V. Elsukov if (error != 0) { 705000c42faSBjoern A. Zeeb IP6STAT_INC(ip6s_noroute); 706a1f7e5f8SHajimu UMEMOTO if (ifp != NULL) 70782cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_discard); 70882cd038dSYoshinobu Inoue goto bad; 70982cd038dSYoshinobu Inoue } 71050fa27e7SAlexander V. Chernikov /* 71150fa27e7SAlexander V. Chernikov * At this point at least @ifp is not NULL 71250fa27e7SAlexander V. Chernikov * Can be the case when dst is multicast, link-local or 71350fa27e7SAlexander V. Chernikov * interface is explicitly specificed by the caller. 71450fa27e7SAlexander V. Chernikov */ 71516607317SAndrey V. Elsukov } 716983066f0SAlexander V. Chernikov if (nh == NULL) { 717a1f7e5f8SHajimu UMEMOTO /* 718983066f0SAlexander V. Chernikov * If in6_selectroute() does not return a nexthop 719a1f7e5f8SHajimu UMEMOTO * dst may not have been updated. 720a1f7e5f8SHajimu UMEMOTO */ 721a1f7e5f8SHajimu UMEMOTO *dst = dst_sa; /* XXX */ 72250fa27e7SAlexander V. Chernikov origifp = ifp; 72350fa27e7SAlexander V. Chernikov mtu = ifp->if_mtu; 724000c42faSBjoern A. Zeeb } else { 72550fa27e7SAlexander V. Chernikov ifp = nh->nh_ifp; 72650fa27e7SAlexander V. Chernikov origifp = nh->nh_aifp; 727983066f0SAlexander V. Chernikov ia = (struct in6_ifaddr *)(nh->nh_ifa); 728983066f0SAlexander V. Chernikov counter_u64_add(nh->nh_pksent, 1); 729000c42faSBjoern A. Zeeb } 730000c42faSBjoern A. Zeeb } else { 7311483c1c5SAlexander V. Chernikov struct nhop_object *nh; 732000c42faSBjoern A. Zeeb struct in6_addr kdst; 733000c42faSBjoern A. Zeeb uint32_t scopeid; 734000c42faSBjoern A. Zeeb 735000c42faSBjoern A. Zeeb if (fwd_tag == NULL) { 736000c42faSBjoern A. Zeeb bzero(&dst_sa, sizeof(dst_sa)); 737000c42faSBjoern A. Zeeb dst_sa.sin6_family = AF_INET6; 738000c42faSBjoern A. Zeeb dst_sa.sin6_len = sizeof(dst_sa); 739000c42faSBjoern A. Zeeb dst_sa.sin6_addr = ip6->ip6_dst; 740000c42faSBjoern A. Zeeb } 741000c42faSBjoern A. Zeeb 742000c42faSBjoern A. Zeeb if (IN6_IS_ADDR_MULTICAST(&dst_sa.sin6_addr) && 743000c42faSBjoern A. Zeeb im6o != NULL && 744000c42faSBjoern A. Zeeb (ifp = im6o->im6o_multicast_ifp) != NULL) { 745000c42faSBjoern A. Zeeb /* We do not need a route lookup. */ 746000c42faSBjoern A. Zeeb *dst = dst_sa; /* XXX */ 74750fa27e7SAlexander V. Chernikov origifp = ifp; 748000c42faSBjoern A. Zeeb goto nonh6lookup; 749000c42faSBjoern A. Zeeb } 750000c42faSBjoern A. Zeeb 751000c42faSBjoern A. Zeeb in6_splitscope(&dst_sa.sin6_addr, &kdst, &scopeid); 752000c42faSBjoern A. Zeeb 753000c42faSBjoern A. Zeeb if (IN6_IS_ADDR_MC_LINKLOCAL(&dst_sa.sin6_addr) || 754000c42faSBjoern A. Zeeb IN6_IS_ADDR_MC_NODELOCAL(&dst_sa.sin6_addr)) { 755000c42faSBjoern A. Zeeb if (scopeid > 0) { 756000c42faSBjoern A. Zeeb ifp = in6_getlinkifnet(scopeid); 75719afc65aSMark Johnston if (ifp == NULL) { 75819afc65aSMark Johnston error = EHOSTUNREACH; 75919afc65aSMark Johnston goto bad; 76019afc65aSMark Johnston } 761000c42faSBjoern A. Zeeb *dst = dst_sa; /* XXX */ 76250fa27e7SAlexander V. Chernikov origifp = ifp; 763000c42faSBjoern A. Zeeb goto nonh6lookup; 764000c42faSBjoern A. Zeeb } 765000c42faSBjoern A. Zeeb } 766000c42faSBjoern A. Zeeb 7670c325f53SAlexander V. Chernikov nh = fib6_lookup(fibnum, &kdst, scopeid, NHR_NONE, 7680c325f53SAlexander V. Chernikov m->m_pkthdr.flowid); 7691483c1c5SAlexander V. Chernikov if (nh == NULL) { 770000c42faSBjoern A. Zeeb IP6STAT_INC(ip6s_noroute); 771000c42faSBjoern A. Zeeb /* No ifp in6_ifstat_inc(ifp, ifs6_out_discard); */ 772000c42faSBjoern A. Zeeb error = EHOSTUNREACH;; 773000c42faSBjoern A. Zeeb goto bad; 774000c42faSBjoern A. Zeeb } 775000c42faSBjoern A. Zeeb 7761483c1c5SAlexander V. Chernikov ifp = nh->nh_ifp; 77750fa27e7SAlexander V. Chernikov origifp = nh->nh_aifp; 7781483c1c5SAlexander V. Chernikov ia = ifatoia6(nh->nh_ifa); 7791483c1c5SAlexander V. Chernikov if (nh->nh_flags & NHF_GATEWAY) 7801483c1c5SAlexander V. Chernikov dst->sin6_addr = nh->gw6_sa.sin6_addr; 7817d98cc09SAndrey V. Elsukov else if (fwd_tag != NULL) 7827d98cc09SAndrey V. Elsukov dst->sin6_addr = dst_sa.sin6_addr; 783000c42faSBjoern A. Zeeb nonh6lookup: 784000c42faSBjoern A. Zeeb ; 78582cd038dSYoshinobu Inoue } 78650fa27e7SAlexander V. Chernikov /* 78750fa27e7SAlexander V. Chernikov * At this point ifp MUST be pointing to the valid transmit ifp. 78850fa27e7SAlexander V. Chernikov * origifp MUST be valid and pointing to either the same ifp or, 78950fa27e7SAlexander V. Chernikov * in case of loopback output, to the interface which ip6_src 79050fa27e7SAlexander V. Chernikov * belongs to. 79150fa27e7SAlexander V. Chernikov * Examples: 79250fa27e7SAlexander V. Chernikov * fe80::1%em0 -> fe80::2%em0 -> ifp=em0, origifp=em0 79350fa27e7SAlexander V. Chernikov * fe80::1%em0 -> fe80::1%em0 -> ifp=lo0, origifp=em0 79450fa27e7SAlexander V. Chernikov * ::1 -> ::1 -> ifp=lo0, origifp=lo0 79550fa27e7SAlexander V. Chernikov * 79650fa27e7SAlexander V. Chernikov * mtu can be 0 and will be refined later. 79750fa27e7SAlexander V. Chernikov */ 79850fa27e7SAlexander V. Chernikov KASSERT((ifp != NULL), ("output interface must not be NULL")); 79950fa27e7SAlexander V. Chernikov KASSERT((origifp != NULL), ("output address interface must not be NULL")); 80082cd038dSYoshinobu Inoue 801a1f7e5f8SHajimu UMEMOTO if ((flags & IPV6_FORWARDING) == 0) { 802a1f7e5f8SHajimu UMEMOTO /* XXX: the FORWARDING flag can be set for mrouting. */ 803a1f7e5f8SHajimu UMEMOTO in6_ifstat_inc(ifp, ifs6_out_request); 804a1f7e5f8SHajimu UMEMOTO } 805a1f7e5f8SHajimu UMEMOTO 806ef0111fdSHans Petter Selasky /* Setup data structures for scope ID checks. */ 807a1f7e5f8SHajimu UMEMOTO src0 = ip6->ip6_src; 808a1f7e5f8SHajimu UMEMOTO bzero(&src_sa, sizeof(src_sa)); 809a1f7e5f8SHajimu UMEMOTO src_sa.sin6_family = AF_INET6; 810a1f7e5f8SHajimu UMEMOTO src_sa.sin6_len = sizeof(src_sa); 811a1f7e5f8SHajimu UMEMOTO src_sa.sin6_addr = ip6->ip6_src; 812a1f7e5f8SHajimu UMEMOTO 813a1f7e5f8SHajimu UMEMOTO dst0 = ip6->ip6_dst; 8147c1daefeSBjoern A. Zeeb /* Re-initialize to be sure. */ 815a1f7e5f8SHajimu UMEMOTO bzero(&dst_sa, sizeof(dst_sa)); 816a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_family = AF_INET6; 817a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_len = sizeof(dst_sa); 818a1f7e5f8SHajimu UMEMOTO dst_sa.sin6_addr = ip6->ip6_dst; 819a1f7e5f8SHajimu UMEMOTO 820ef0111fdSHans Petter Selasky /* Check for valid scope ID. */ 82150fa27e7SAlexander V. Chernikov if (in6_setscope(&src0, origifp, &zone) == 0 && 822ef0111fdSHans Petter Selasky sa6_recoverscope(&src_sa) == 0 && zone == src_sa.sin6_scope_id && 82350fa27e7SAlexander V. Chernikov in6_setscope(&dst0, origifp, &zone) == 0 && 824ef0111fdSHans Petter Selasky sa6_recoverscope(&dst_sa) == 0 && zone == dst_sa.sin6_scope_id) { 825ef0111fdSHans Petter Selasky /* 826ef0111fdSHans Petter Selasky * The outgoing interface is in the zone of the source 827ef0111fdSHans Petter Selasky * and destination addresses. 828ef0111fdSHans Petter Selasky * 829ef0111fdSHans Petter Selasky */ 83050fa27e7SAlexander V. Chernikov } else if ((origifp->if_flags & IFF_LOOPBACK) == 0 || 831ef0111fdSHans Petter Selasky sa6_recoverscope(&src_sa) != 0 || 832ef0111fdSHans Petter Selasky sa6_recoverscope(&dst_sa) != 0 || 833ef0111fdSHans Petter Selasky dst_sa.sin6_scope_id == 0 || 834ef0111fdSHans Petter Selasky (src_sa.sin6_scope_id != 0 && 835ef0111fdSHans Petter Selasky src_sa.sin6_scope_id != dst_sa.sin6_scope_id) || 83650fa27e7SAlexander V. Chernikov ifnet_byindex(dst_sa.sin6_scope_id) == NULL) { 837ef0111fdSHans Petter Selasky /* 838ef0111fdSHans Petter Selasky * If the destination network interface is not a 839ef0111fdSHans Petter Selasky * loopback interface, or the destination network 840ef0111fdSHans Petter Selasky * address has no scope ID, or the source address has 841ef0111fdSHans Petter Selasky * a scope ID set which is different from the 842ef0111fdSHans Petter Selasky * destination address one, or there is no network 843ef0111fdSHans Petter Selasky * interface representing this scope ID, the address 844ef0111fdSHans Petter Selasky * pair is considered invalid. 845ef0111fdSHans Petter Selasky */ 8469cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_badscope); 84750fa27e7SAlexander V. Chernikov in6_ifstat_inc(origifp, ifs6_out_discard); 848a1f7e5f8SHajimu UMEMOTO if (error == 0) 849a1f7e5f8SHajimu UMEMOTO error = EHOSTUNREACH; /* XXX */ 850a1f7e5f8SHajimu UMEMOTO goto bad; 851ef0111fdSHans Petter Selasky } 852ef0111fdSHans Petter Selasky /* All scope ID checks are successful. */ 853ef0111fdSHans Petter Selasky 854983066f0SAlexander V. Chernikov if (nh && !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 855983066f0SAlexander V. Chernikov if (opt && opt->ip6po_nextroute.ro_nh) { 856a1f7e5f8SHajimu UMEMOTO /* 857a1f7e5f8SHajimu UMEMOTO * The nexthop is explicitly specified by the 858a1f7e5f8SHajimu UMEMOTO * application. We assume the next hop is an IPv6 859a1f7e5f8SHajimu UMEMOTO * address. 860a1f7e5f8SHajimu UMEMOTO */ 861a1f7e5f8SHajimu UMEMOTO dst = (struct sockaddr_in6 *)opt->ip6po_nexthop; 862a1f7e5f8SHajimu UMEMOTO } 863983066f0SAlexander V. Chernikov else if ((nh->nh_flags & NHF_GATEWAY)) 864983066f0SAlexander V. Chernikov dst = &nh->gw6_sa; 865a1f7e5f8SHajimu UMEMOTO } 866a1f7e5f8SHajimu UMEMOTO 867a1f7e5f8SHajimu UMEMOTO if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 8687c1daefeSBjoern A. Zeeb m->m_flags &= ~(M_BCAST | M_MCAST); /* Just in case. */ 86982cd038dSYoshinobu Inoue } else { 87082cd038dSYoshinobu Inoue m->m_flags = (m->m_flags & ~M_BCAST) | M_MCAST; 87182cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_mcast); 8727c1daefeSBjoern A. Zeeb 8737c1daefeSBjoern A. Zeeb /* Confirm that the outgoing interface supports multicast. */ 874a1f7e5f8SHajimu UMEMOTO if (!(ifp->if_flags & IFF_MULTICAST)) { 8759cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_noroute); 87682cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_discard); 87782cd038dSYoshinobu Inoue error = ENETUNREACH; 87882cd038dSYoshinobu Inoue goto bad; 87982cd038dSYoshinobu Inoue } 88033cde130SBruce M Simpson if ((im6o == NULL && in6_mcast_loop) || 88133cde130SBruce M Simpson (im6o && im6o->im6o_multicast_loop)) { 88282cd038dSYoshinobu Inoue /* 88333cde130SBruce M Simpson * Loop back multicast datagram if not expressly 88433cde130SBruce M Simpson * forbidden to do so, even if we have not joined 88533cde130SBruce M Simpson * the address; protocols will filter it later, 88633cde130SBruce M Simpson * thus deferring a hash lookup and lock acquisition 88733cde130SBruce M Simpson * at the expense of an m_copym(). 88882cd038dSYoshinobu Inoue */ 889331dff07SAlexander V. Chernikov ip6_mloopback(ifp, m); 89091ec0a1eSYoshinobu Inoue } else { 89191ec0a1eSYoshinobu Inoue /* 89291ec0a1eSYoshinobu Inoue * If we are acting as a multicast router, perform 89391ec0a1eSYoshinobu Inoue * multicast forwarding as if the packet had just 89491ec0a1eSYoshinobu Inoue * arrived on the interface to which we are about 89591ec0a1eSYoshinobu Inoue * to send. The multicast forwarding function 89691ec0a1eSYoshinobu Inoue * recursively calls this function, using the 89791ec0a1eSYoshinobu Inoue * IPV6_FORWARDING flag to prevent infinite recursion. 89891ec0a1eSYoshinobu Inoue * 89991ec0a1eSYoshinobu Inoue * Multicasts that are looped back by ip6_mloopback(), 90091ec0a1eSYoshinobu Inoue * above, will be forwarded by the ip6_input() routine, 90191ec0a1eSYoshinobu Inoue * if necessary. 90291ec0a1eSYoshinobu Inoue */ 90333cde130SBruce M Simpson if (V_ip6_mrouter && (flags & IPV6_FORWARDING) == 0) { 904a1f7e5f8SHajimu UMEMOTO /* 905a1f7e5f8SHajimu UMEMOTO * XXX: ip6_mforward expects that rcvif is NULL 906a1f7e5f8SHajimu UMEMOTO * when it is called from the originating path. 9077b07d1beSGleb Smirnoff * However, it may not always be the case. 908a1f7e5f8SHajimu UMEMOTO */ 909a1f7e5f8SHajimu UMEMOTO m->m_pkthdr.rcvif = NULL; 910686cdd19SJun-ichiro itojun Hagino if (ip6_mforward(ip6, ifp, m) != 0) { 91191ec0a1eSYoshinobu Inoue m_freem(m); 91291ec0a1eSYoshinobu Inoue goto done; 91391ec0a1eSYoshinobu Inoue } 91491ec0a1eSYoshinobu Inoue } 91582cd038dSYoshinobu Inoue } 91682cd038dSYoshinobu Inoue /* 91782cd038dSYoshinobu Inoue * Multicasts with a hoplimit of zero may be looped back, 91882cd038dSYoshinobu Inoue * above, but must not be transmitted on a network. 91982cd038dSYoshinobu Inoue * Also, multicasts addressed to the loopback interface 92082cd038dSYoshinobu Inoue * are not sent -- the above call to ip6_mloopback() will 92182cd038dSYoshinobu Inoue * loop back a copy if this host actually belongs to the 92282cd038dSYoshinobu Inoue * destination group on the loopback interface. 92382cd038dSYoshinobu Inoue */ 924f95d4633SHajimu UMEMOTO if (ip6->ip6_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK) || 925f95d4633SHajimu UMEMOTO IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)) { 92682cd038dSYoshinobu Inoue m_freem(m); 92782cd038dSYoshinobu Inoue goto done; 92882cd038dSYoshinobu Inoue } 92982cd038dSYoshinobu Inoue } 93082cd038dSYoshinobu Inoue 93182cd038dSYoshinobu Inoue /* 93282cd038dSYoshinobu Inoue * Fill the outgoing inteface to tell the upper layer 93382cd038dSYoshinobu Inoue * to increment per-interface statistics. 93482cd038dSYoshinobu Inoue */ 93582cd038dSYoshinobu Inoue if (ifpp) 93682cd038dSYoshinobu Inoue *ifpp = ifp; 93782cd038dSYoshinobu Inoue 93831b3783cSHajimu UMEMOTO /* Determine path MTU. */ 939f0937b2cSAndrey V. Elsukov if ((error = ip6_getpmtu(ro_pmtu, ro != ro_pmtu, ifp, &ip6->ip6_dst, 940d4c22202SAndrew Gallatin &mtu, &alwaysfrag, fibnum, *nexthdrp)) != 0) 94131b3783cSHajimu UMEMOTO goto bad; 942000c42faSBjoern A. Zeeb KASSERT(mtu > 0, ("%s:%d: mtu %ld, ro_pmtu %p ro %p ifp %p " 943000c42faSBjoern A. Zeeb "alwaysfrag %d fibnum %u\n", __func__, __LINE__, mtu, ro_pmtu, ro, 944000c42faSBjoern A. Zeeb ifp, alwaysfrag, fibnum)); 94582cd038dSYoshinobu Inoue 94633841545SHajimu UMEMOTO /* 9478b00e59dSHajimu UMEMOTO * The caller of this function may specify to use the minimum MTU 9488b00e59dSHajimu UMEMOTO * in some cases. 9498b00e59dSHajimu UMEMOTO * An advanced API option (IPV6_USE_MIN_MTU) can also override MTU 9508b00e59dSHajimu UMEMOTO * setting. The logic is a bit complicated; by default, unicast 9518b00e59dSHajimu UMEMOTO * packets will follow path MTU while multicast packets will be sent at 9528b00e59dSHajimu UMEMOTO * the minimum MTU. If IP6PO_MINMTU_ALL is specified, all packets 9538b00e59dSHajimu UMEMOTO * including unicast ones will be sent at the minimum MTU. Multicast 9548b00e59dSHajimu UMEMOTO * packets will always be sent at the minimum MTU unless 9558b00e59dSHajimu UMEMOTO * IP6PO_MINMTU_DISABLE is explicitly specified. 9568b00e59dSHajimu UMEMOTO * See RFC 3542 for more details. 95733841545SHajimu UMEMOTO */ 9588b00e59dSHajimu UMEMOTO if (mtu > IPV6_MMTU) { 9598b00e59dSHajimu UMEMOTO if ((flags & IPV6_MINMTU)) 96033841545SHajimu UMEMOTO mtu = IPV6_MMTU; 9618b00e59dSHajimu UMEMOTO else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL) 9628b00e59dSHajimu UMEMOTO mtu = IPV6_MMTU; 9638b00e59dSHajimu UMEMOTO else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 9648b00e59dSHajimu UMEMOTO (opt == NULL || 9658b00e59dSHajimu UMEMOTO opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE)) { 9668b00e59dSHajimu UMEMOTO mtu = IPV6_MMTU; 9678b00e59dSHajimu UMEMOTO } 9688b00e59dSHajimu UMEMOTO } 96933841545SHajimu UMEMOTO 97033841545SHajimu UMEMOTO /* 9717c1daefeSBjoern A. Zeeb * Clear embedded scope identifiers if necessary. 9727c1daefeSBjoern A. Zeeb * in6_clearscope() will touch the addresses only when necessary. 97333841545SHajimu UMEMOTO */ 97433841545SHajimu UMEMOTO in6_clearscope(&ip6->ip6_src); 97533841545SHajimu UMEMOTO in6_clearscope(&ip6->ip6_dst); 97682cd038dSYoshinobu Inoue 97782cd038dSYoshinobu Inoue /* 97882cd038dSYoshinobu Inoue * If the outgoing packet contains a hop-by-hop options header, 97982cd038dSYoshinobu Inoue * it must be examined and processed even by the source node. 98082cd038dSYoshinobu Inoue * (RFC 2460, section 4.) 98182cd038dSYoshinobu Inoue */ 98282cd038dSYoshinobu Inoue if (exthdrs.ip6e_hbh) { 98333841545SHajimu UMEMOTO struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *); 984283f9f8aSHajimu UMEMOTO u_int32_t dummy; /* XXX unused */ 985283f9f8aSHajimu UMEMOTO u_int32_t plen = 0; /* XXX: ip6_process will check the value */ 98682cd038dSYoshinobu Inoue 98733841545SHajimu UMEMOTO #ifdef DIAGNOSTIC 98833841545SHajimu UMEMOTO if ((hbh->ip6h_len + 1) << 3 > exthdrs.ip6e_hbh->m_len) 9896d79f3f6SRebecca Cran panic("ip6e_hbh is not contiguous"); 99033841545SHajimu UMEMOTO #endif 99182cd038dSYoshinobu Inoue /* 99282cd038dSYoshinobu Inoue * XXX: if we have to send an ICMPv6 error to the sender, 99382cd038dSYoshinobu Inoue * we need the M_LOOP flag since icmp6_error() expects 99482cd038dSYoshinobu Inoue * the IPv6 and the hop-by-hop options header are 9956d79f3f6SRebecca Cran * contiguous unless the flag is set. 99682cd038dSYoshinobu Inoue */ 99782cd038dSYoshinobu Inoue m->m_flags |= M_LOOP; 99882cd038dSYoshinobu Inoue m->m_pkthdr.rcvif = ifp; 9997efe5d92SHajimu UMEMOTO if (ip6_process_hopopts(m, (u_int8_t *)(hbh + 1), 10007efe5d92SHajimu UMEMOTO ((hbh->ip6h_len + 1) << 3) - sizeof(struct ip6_hbh), 1001283f9f8aSHajimu UMEMOTO &dummy, &plen) < 0) { 10027c1daefeSBjoern A. Zeeb /* m was already freed at this point. */ 100382cd038dSYoshinobu Inoue error = EINVAL;/* better error? */ 100482cd038dSYoshinobu Inoue goto done; 100582cd038dSYoshinobu Inoue } 100682cd038dSYoshinobu Inoue m->m_flags &= ~M_LOOP; /* XXX */ 100782cd038dSYoshinobu Inoue m->m_pkthdr.rcvif = NULL; 100882cd038dSYoshinobu Inoue } 100982cd038dSYoshinobu Inoue 1010c21fd232SAndre Oppermann /* Jump over all PFIL processing if hooks are not active. */ 1011b252313fSGleb Smirnoff if (!PFIL_HOOKED_OUT(V_inet6_pfil_head)) 1012c21fd232SAndre Oppermann goto passout; 1013c21fd232SAndre Oppermann 10148195404bSBrooks Davis odst = ip6->ip6_dst; 1015c21fd232SAndre Oppermann /* Run through list of hooks for output packets. */ 1016dda6376bSMateusz Guzik switch (pfil_mbuf_out(V_inet6_pfil_head, &m, ifp, inp)) { 1017b252313fSGleb Smirnoff case PFIL_PASS: 1018c4ac87eaSDarren Reed ip6 = mtod(m, struct ip6_hdr *); 1019b252313fSGleb Smirnoff break; 1020b252313fSGleb Smirnoff case PFIL_DROPPED: 1021e00ee1a9SGleb Smirnoff error = EACCES; 1022b252313fSGleb Smirnoff /* FALLTHROUGH */ 1023b252313fSGleb Smirnoff case PFIL_CONSUMED: 1024b252313fSGleb Smirnoff goto done; 1025b252313fSGleb Smirnoff } 10267efe5d92SHajimu UMEMOTO 10279c57a5b6SHiroki Sato needfiblookup = 0; 10288195404bSBrooks Davis /* See if destination IP address was changed by packet filter. */ 10298195404bSBrooks Davis if (!IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst)) { 10308195404bSBrooks Davis m->m_flags |= M_SKIP_FIREWALL; 10318195404bSBrooks Davis /* If destination is now ourself drop to ip6_input(). */ 10328a006adbSBjoern A. Zeeb if (in6_localip(&ip6->ip6_dst)) { 10338a006adbSBjoern A. Zeeb m->m_flags |= M_FASTFWD_OURS; 10348195404bSBrooks Davis if (m->m_pkthdr.rcvif == NULL) 1035603724d3SBjoern A. Zeeb m->m_pkthdr.rcvif = V_loif; 1036356ab07eSBjoern A. Zeeb if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6) { 10378195404bSBrooks Davis m->m_pkthdr.csum_flags |= 1038356ab07eSBjoern A. Zeeb CSUM_DATA_VALID_IPV6 | CSUM_PSEUDO_HDR; 10398195404bSBrooks Davis m->m_pkthdr.csum_data = 0xffff; 10408195404bSBrooks Davis } 104195033af9SMark Johnston #if defined(SCTP) || defined(SCTP_SUPPORT) 1042a6cff10fSMichael Tuexen if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV6) 10439b03990aSRandall Stewart m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID; 10449b03990aSRandall Stewart #endif 10458195404bSBrooks Davis error = netisr_queue(NETISR_IPV6, m); 10468195404bSBrooks Davis goto done; 10474ee7e5a6SAndrey V. Elsukov } else { 1048000c42faSBjoern A. Zeeb if (ro != NULL) 1049ec86402eSBjoern A. Zeeb RO_INVALIDATE_CACHE(ro); 10509c57a5b6SHiroki Sato needfiblookup = 1; /* Redo the routing table lookup. */ 10518195404bSBrooks Davis } 10524ee7e5a6SAndrey V. Elsukov } 10539c57a5b6SHiroki Sato /* See if fib was changed by packet filter. */ 10549c57a5b6SHiroki Sato if (fibnum != M_GETFIB(m)) { 10559c57a5b6SHiroki Sato m->m_flags |= M_SKIP_FIREWALL; 10569c57a5b6SHiroki Sato fibnum = M_GETFIB(m); 1057000c42faSBjoern A. Zeeb if (ro != NULL) 1058ec86402eSBjoern A. Zeeb RO_INVALIDATE_CACHE(ro); 10599c57a5b6SHiroki Sato needfiblookup = 1; 10609c57a5b6SHiroki Sato } 10619c57a5b6SHiroki Sato if (needfiblookup) 10629c57a5b6SHiroki Sato goto again; 10638195404bSBrooks Davis 10648a006adbSBjoern A. Zeeb /* See if local, if yes, send it to netisr. */ 10658a006adbSBjoern A. Zeeb if (m->m_flags & M_FASTFWD_OURS) { 10668a006adbSBjoern A. Zeeb if (m->m_pkthdr.rcvif == NULL) 10678a006adbSBjoern A. Zeeb m->m_pkthdr.rcvif = V_loif; 1068356ab07eSBjoern A. Zeeb if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6) { 10698a006adbSBjoern A. Zeeb m->m_pkthdr.csum_flags |= 1070356ab07eSBjoern A. Zeeb CSUM_DATA_VALID_IPV6 | CSUM_PSEUDO_HDR; 10718a006adbSBjoern A. Zeeb m->m_pkthdr.csum_data = 0xffff; 10728a006adbSBjoern A. Zeeb } 107395033af9SMark Johnston #if defined(SCTP) || defined(SCTP_SUPPORT) 1074a6cff10fSMichael Tuexen if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV6) 10758a006adbSBjoern A. Zeeb m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID; 10768a006adbSBjoern A. Zeeb #endif 10778a006adbSBjoern A. Zeeb error = netisr_queue(NETISR_IPV6, m); 10788a006adbSBjoern A. Zeeb goto done; 10798a006adbSBjoern A. Zeeb } 10808a006adbSBjoern A. Zeeb /* Or forward to some other address? */ 1081ffdbf9daSAndrey V. Elsukov if ((m->m_flags & M_IP6_NEXTHOP) && 1082ffdbf9daSAndrey V. Elsukov (fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) { 1083000c42faSBjoern A. Zeeb if (ro != NULL) 10848a006adbSBjoern A. Zeeb dst = (struct sockaddr_in6 *)&ro->ro_dst; 1085000c42faSBjoern A. Zeeb else 1086000c42faSBjoern A. Zeeb dst = &sin6; 1087f8fe3dc9SAndrey V. Elsukov bcopy((fwd_tag+1), &dst_sa, sizeof(struct sockaddr_in6)); 10888a006adbSBjoern A. Zeeb m->m_flags |= M_SKIP_FIREWALL; 1089ffdbf9daSAndrey V. Elsukov m->m_flags &= ~M_IP6_NEXTHOP; 10908a006adbSBjoern A. Zeeb m_tag_delete(m, fwd_tag); 10918a006adbSBjoern A. Zeeb goto again; 10928a006adbSBjoern A. Zeeb } 10938195404bSBrooks Davis 1094c21fd232SAndre Oppermann passout: 1095868aabb4SRichard Scheffenegger if (vlan_pcp > -1) 1096868aabb4SRichard Scheffenegger EVL_APPLY_PRI(m, vlan_pcp); 109744775b16SMark Johnston 109844775b16SMark Johnston /* Ensure the packet data is mapped if the interface requires it. */ 109944775b16SMark Johnston if ((ifp->if_capenable & IFCAP_MEXTPG) == 0) { 110044775b16SMark Johnston m = mb_unmapped_to_ext(m); 110144775b16SMark Johnston if (m == NULL) { 110244775b16SMark Johnston IP6STAT_INC(ip6s_odropped); 110344775b16SMark Johnston return (ENOBUFS); 110444775b16SMark Johnston } 110544775b16SMark Johnston } 110644775b16SMark Johnston 110782cd038dSYoshinobu Inoue /* 110882cd038dSYoshinobu Inoue * Send the packet to the outgoing interface. 110982cd038dSYoshinobu Inoue * If necessary, do IPv6 fragmentation before sending. 1110f95d4633SHajimu UMEMOTO * 11117c1daefeSBjoern A. Zeeb * The logic here is rather complex: 1112f95d4633SHajimu UMEMOTO * 1: normal case (dontfrag == 0, alwaysfrag == 0) 1113f95d4633SHajimu UMEMOTO * 1-a: send as is if tlen <= path mtu 1114f95d4633SHajimu UMEMOTO * 1-b: fragment if tlen > path mtu 1115f95d4633SHajimu UMEMOTO * 1116f95d4633SHajimu UMEMOTO * 2: if user asks us not to fragment (dontfrag == 1) 1117f95d4633SHajimu UMEMOTO * 2-a: send as is if tlen <= interface mtu 1118f95d4633SHajimu UMEMOTO * 2-b: error if tlen > interface mtu 1119f95d4633SHajimu UMEMOTO * 1120f95d4633SHajimu UMEMOTO * 3: if we always need to attach fragment header (alwaysfrag == 1) 1121f95d4633SHajimu UMEMOTO * always fragment 1122f95d4633SHajimu UMEMOTO * 1123f95d4633SHajimu UMEMOTO * 4: if dontfrag == 1 && alwaysfrag == 1 11247c1daefeSBjoern A. Zeeb * error, as we cannot handle this conflicting request. 112582cd038dSYoshinobu Inoue */ 1126e7b92e27SBjoern A. Zeeb sw_csum = m->m_pkthdr.csum_flags; 1127e7b92e27SBjoern A. Zeeb if (!hdrsplit) { 1128b092fd6cSNavdeep Parhar tso = ((sw_csum & ifp->if_hwassist & 1129b092fd6cSNavdeep Parhar (CSUM_TSO | CSUM_INNER_TSO)) != 0) ? 1 : 0; 1130e7b92e27SBjoern A. Zeeb sw_csum &= ~ifp->if_hwassist; 1131e7b92e27SBjoern A. Zeeb } else 1132e7b92e27SBjoern A. Zeeb tso = 0; 1133e7b92e27SBjoern A. Zeeb /* 1134e7b92e27SBjoern A. Zeeb * If we added extension headers, we will not do TSO and calculate the 1135e7b92e27SBjoern A. Zeeb * checksums ourselves for now. 1136e7b92e27SBjoern A. Zeeb * XXX-BZ Need a framework to know when the NIC can handle it, even 1137e7b92e27SBjoern A. Zeeb * with ext. hdrs. 1138e7b92e27SBjoern A. Zeeb */ 113944775b16SMark Johnston ip6_output_delayed_csum(m, ifp, sw_csum, plen, optlen); 11403459050cSBjoern A. Zeeb /* XXX-BZ m->m_pkthdr.csum_flags &= ~ifp->if_hwassist; */ 114182cd038dSYoshinobu Inoue tlen = m->m_pkthdr.len; 114282cd038dSYoshinobu Inoue 1143e7b92e27SBjoern A. Zeeb if ((opt && (opt->ip6po_flags & IP6PO_DONTFRAG)) || tso) 1144f95d4633SHajimu UMEMOTO dontfrag = 1; 1145f95d4633SHajimu UMEMOTO else 1146f95d4633SHajimu UMEMOTO dontfrag = 0; 11477c1daefeSBjoern A. Zeeb if (dontfrag && alwaysfrag) { /* Case 4. */ 11487c1daefeSBjoern A. Zeeb /* Conflicting request - can't transmit. */ 1149f95d4633SHajimu UMEMOTO error = EMSGSIZE; 1150f95d4633SHajimu UMEMOTO goto bad; 1151f95d4633SHajimu UMEMOTO } 11527c1daefeSBjoern A. Zeeb if (dontfrag && tlen > IN6_LINKMTU(ifp) && !tso) { /* Case 2-b. */ 1153f95d4633SHajimu UMEMOTO /* 1154f95d4633SHajimu UMEMOTO * Even if the DONTFRAG option is specified, we cannot send the 1155f95d4633SHajimu UMEMOTO * packet when the data length is larger than the MTU of the 1156f95d4633SHajimu UMEMOTO * outgoing interface. 11578f1beb88SAndrey V. Elsukov * Notify the error by sending IPV6_PATHMTU ancillary data if 11588f1beb88SAndrey V. Elsukov * application wanted to know the MTU value. Also return an 11598f1beb88SAndrey V. Elsukov * error code (this is not described in the API spec). 1160f95d4633SHajimu UMEMOTO */ 11618f1beb88SAndrey V. Elsukov if (inp != NULL) 11628f1beb88SAndrey V. Elsukov ip6_notify_pmtu(inp, &dst_sa, (u_int32_t)mtu); 1163f95d4633SHajimu UMEMOTO error = EMSGSIZE; 1164f95d4633SHajimu UMEMOTO goto bad; 1165f95d4633SHajimu UMEMOTO } 1166f95d4633SHajimu UMEMOTO 11677c1daefeSBjoern A. Zeeb /* Transmit packet without fragmentation. */ 11687c1daefeSBjoern A. Zeeb if (dontfrag || (!alwaysfrag && tlen <= mtu)) { /* Cases 1-a and 2-a. */ 1169f95d4633SHajimu UMEMOTO struct in6_ifaddr *ia6; 1170f95d4633SHajimu UMEMOTO 1171f95d4633SHajimu UMEMOTO ip6 = mtod(m, struct ip6_hdr *); 1172f95d4633SHajimu UMEMOTO ia6 = in6_ifawithifp(ifp, &ip6->ip6_src); 1173f95d4633SHajimu UMEMOTO if (ia6) { 11745da9f8faSJosef Karthauser /* Record statistics for this interface address. */ 11757caf4ab7SGleb Smirnoff counter_u64_add(ia6->ia_ifa.ifa_opackets, 1); 11767caf4ab7SGleb Smirnoff counter_u64_add(ia6->ia_ifa.ifa_obytes, 11777caf4ab7SGleb Smirnoff m->m_pkthdr.len); 11785da9f8faSJosef Karthauser } 1179d7452d89SAndrew Gallatin error = ip6_output_send(inp, ifp, origifp, m, dst, ro, 1180d7452d89SAndrew Gallatin (flags & IP_NO_SND_TAG_RL) ? false : true); 118182cd038dSYoshinobu Inoue goto done; 1182f95d4633SHajimu UMEMOTO } 1183f95d4633SHajimu UMEMOTO 11847c1daefeSBjoern A. Zeeb /* Try to fragment the packet. Cases 1-b and 3. */ 1185f95d4633SHajimu UMEMOTO if (mtu < IPV6_MMTU) { 11867c1daefeSBjoern A. Zeeb /* Path MTU cannot be less than IPV6_MMTU. */ 118782cd038dSYoshinobu Inoue error = EMSGSIZE; 118882cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_fragfail); 118982cd038dSYoshinobu Inoue goto bad; 11907efe5d92SHajimu UMEMOTO } else if (ip6->ip6_plen == 0) { 11917c1daefeSBjoern A. Zeeb /* Jumbo payload cannot be fragmented. */ 119282cd038dSYoshinobu Inoue error = EMSGSIZE; 119382cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_fragfail); 119482cd038dSYoshinobu Inoue goto bad; 119582cd038dSYoshinobu Inoue } else { 119682cd038dSYoshinobu Inoue u_char nextproto; 11972cb64cb2SGeorge V. Neville-Neil 119882cd038dSYoshinobu Inoue /* 119982cd038dSYoshinobu Inoue * Too large for the destination or interface; 120082cd038dSYoshinobu Inoue * fragment if possible. 120182cd038dSYoshinobu Inoue * Must be able to put at least 8 bytes per fragment. 120282cd038dSYoshinobu Inoue */ 120382cd038dSYoshinobu Inoue if (mtu > IPV6_MAXPACKET) 120482cd038dSYoshinobu Inoue mtu = IPV6_MAXPACKET; 120533841545SHajimu UMEMOTO 12063459050cSBjoern A. Zeeb len = (mtu - unfragpartlen - sizeof(struct ip6_frag)) & ~7; 120782cd038dSYoshinobu Inoue if (len < 8) { 120882cd038dSYoshinobu Inoue error = EMSGSIZE; 120982cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_fragfail); 121082cd038dSYoshinobu Inoue goto bad; 121182cd038dSYoshinobu Inoue } 121282cd038dSYoshinobu Inoue 12136f8aee22SBill Paul /* 1214e7b92e27SBjoern A. Zeeb * If the interface will not calculate checksums on 1215e7b92e27SBjoern A. Zeeb * fragmented packets, then do it here. 1216e7b92e27SBjoern A. Zeeb * XXX-BZ handle the hw offloading case. Need flags. 1217e7b92e27SBjoern A. Zeeb */ 121844775b16SMark Johnston ip6_output_delayed_csum(m, ifp, m->m_pkthdr.csum_flags, plen, 121944775b16SMark Johnston optlen); 12203459050cSBjoern A. Zeeb 122182cd038dSYoshinobu Inoue /* 122282cd038dSYoshinobu Inoue * Change the next header field of the last header in the 122382cd038dSYoshinobu Inoue * unfragmentable part. 122482cd038dSYoshinobu Inoue */ 122582cd038dSYoshinobu Inoue if (exthdrs.ip6e_rthdr) { 122682cd038dSYoshinobu Inoue nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *); 122782cd038dSYoshinobu Inoue *mtod(exthdrs.ip6e_rthdr, u_char *) = IPPROTO_FRAGMENT; 122882cd038dSYoshinobu Inoue } else if (exthdrs.ip6e_dest1) { 122982cd038dSYoshinobu Inoue nextproto = *mtod(exthdrs.ip6e_dest1, u_char *); 123082cd038dSYoshinobu Inoue *mtod(exthdrs.ip6e_dest1, u_char *) = IPPROTO_FRAGMENT; 123182cd038dSYoshinobu Inoue } else if (exthdrs.ip6e_hbh) { 123282cd038dSYoshinobu Inoue nextproto = *mtod(exthdrs.ip6e_hbh, u_char *); 123382cd038dSYoshinobu Inoue *mtod(exthdrs.ip6e_hbh, u_char *) = IPPROTO_FRAGMENT; 123482cd038dSYoshinobu Inoue } else { 12353459050cSBjoern A. Zeeb ip6 = mtod(m, struct ip6_hdr *); 123682cd038dSYoshinobu Inoue nextproto = ip6->ip6_nxt; 123782cd038dSYoshinobu Inoue ip6->ip6_nxt = IPPROTO_FRAGMENT; 123882cd038dSYoshinobu Inoue } 123982cd038dSYoshinobu Inoue 124082cd038dSYoshinobu Inoue /* 124182cd038dSYoshinobu Inoue * Loop through length of segment after first fragment, 124288ff5695SSUZUKI Shinsuke * make new header and copy data of each part and link onto 124388ff5695SSUZUKI Shinsuke * chain. 124482cd038dSYoshinobu Inoue */ 124582cd038dSYoshinobu Inoue m0 = m; 124679831849SKristof Provost id = htonl(ip6_randomid()); 12473459050cSBjoern A. Zeeb error = ip6_fragment(ifp, m, unfragpartlen, nextproto,len, id); 12483459050cSBjoern A. Zeeb if (error != 0) 124982cd038dSYoshinobu Inoue goto sendorfree; 125082cd038dSYoshinobu Inoue 125182cd038dSYoshinobu Inoue in6_ifstat_inc(ifp, ifs6_out_fragok); 125282cd038dSYoshinobu Inoue } 125382cd038dSYoshinobu Inoue 12547c1daefeSBjoern A. Zeeb /* Remove leading garbage. */ 125582cd038dSYoshinobu Inoue sendorfree: 125682cd038dSYoshinobu Inoue m = m0->m_nextpkt; 125782cd038dSYoshinobu Inoue m0->m_nextpkt = 0; 125882cd038dSYoshinobu Inoue m_freem(m0); 1259c187c034SJonathan T. Looney for (; m; m = m0) { 126082cd038dSYoshinobu Inoue m0 = m->m_nextpkt; 126182cd038dSYoshinobu Inoue m->m_nextpkt = 0; 126282cd038dSYoshinobu Inoue if (error == 0) { 1263fe937674SJosef Karthauser /* Record statistics for this interface address. */ 1264fe937674SJosef Karthauser if (ia) { 12657caf4ab7SGleb Smirnoff counter_u64_add(ia->ia_ifa.ifa_opackets, 1); 12667caf4ab7SGleb Smirnoff counter_u64_add(ia->ia_ifa.ifa_obytes, 12677caf4ab7SGleb Smirnoff m->m_pkthdr.len); 1268fe937674SJosef Karthauser } 1269868aabb4SRichard Scheffenegger if (vlan_pcp > -1) 1270868aabb4SRichard Scheffenegger EVL_APPLY_PRI(m, vlan_pcp); 1271d7452d89SAndrew Gallatin error = ip6_output_send(inp, ifp, origifp, m, dst, ro, 1272d7452d89SAndrew Gallatin true); 127382cd038dSYoshinobu Inoue } else 127482cd038dSYoshinobu Inoue m_freem(m); 127582cd038dSYoshinobu Inoue } 127682cd038dSYoshinobu Inoue 127782cd038dSYoshinobu Inoue if (error == 0) 12789cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_fragmented); 127982cd038dSYoshinobu Inoue 128082cd038dSYoshinobu Inoue done: 128182cd038dSYoshinobu Inoue return (error); 128282cd038dSYoshinobu Inoue 128382cd038dSYoshinobu Inoue freehdrs: 12847c1daefeSBjoern A. Zeeb m_freem(exthdrs.ip6e_hbh); /* m_freem() checks if mbuf is NULL. */ 128582cd038dSYoshinobu Inoue m_freem(exthdrs.ip6e_dest1); 128682cd038dSYoshinobu Inoue m_freem(exthdrs.ip6e_rthdr); 128782cd038dSYoshinobu Inoue m_freem(exthdrs.ip6e_dest2); 12887efe5d92SHajimu UMEMOTO /* FALLTHROUGH */ 128982cd038dSYoshinobu Inoue bad: 12902cb64cb2SGeorge V. Neville-Neil if (m) 129182cd038dSYoshinobu Inoue m_freem(m); 129282cd038dSYoshinobu Inoue goto done; 129382cd038dSYoshinobu Inoue } 129482cd038dSYoshinobu Inoue 129582cd038dSYoshinobu Inoue static int 12961272577eSXin LI ip6_copyexthdr(struct mbuf **mp, caddr_t hdr, int hlen) 129782cd038dSYoshinobu Inoue { 129882cd038dSYoshinobu Inoue struct mbuf *m; 129982cd038dSYoshinobu Inoue 130082cd038dSYoshinobu Inoue if (hlen > MCLBYTES) 130182cd038dSYoshinobu Inoue return (ENOBUFS); /* XXX */ 130282cd038dSYoshinobu Inoue 130310e5acc3SGleb Smirnoff if (hlen > MLEN) 130410e5acc3SGleb Smirnoff m = m_getcl(M_NOWAIT, MT_DATA, 0); 130510e5acc3SGleb Smirnoff else 130610e5acc3SGleb Smirnoff m = m_get(M_NOWAIT, MT_DATA); 130710e5acc3SGleb Smirnoff if (m == NULL) 130882cd038dSYoshinobu Inoue return (ENOBUFS); 130982cd038dSYoshinobu Inoue m->m_len = hlen; 131082cd038dSYoshinobu Inoue if (hdr) 131182cd038dSYoshinobu Inoue bcopy(hdr, mtod(m, caddr_t), hlen); 131282cd038dSYoshinobu Inoue 131382cd038dSYoshinobu Inoue *mp = m; 131482cd038dSYoshinobu Inoue return (0); 131582cd038dSYoshinobu Inoue } 131682cd038dSYoshinobu Inoue 131782cd038dSYoshinobu Inoue /* 131882cd038dSYoshinobu Inoue * Insert jumbo payload option. 131982cd038dSYoshinobu Inoue */ 132082cd038dSYoshinobu Inoue static int 13211272577eSXin LI ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen) 132282cd038dSYoshinobu Inoue { 132382cd038dSYoshinobu Inoue struct mbuf *mopt; 132482cd038dSYoshinobu Inoue u_char *optbuf; 132533841545SHajimu UMEMOTO u_int32_t v; 132682cd038dSYoshinobu Inoue 132782cd038dSYoshinobu Inoue #define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */ 132882cd038dSYoshinobu Inoue 132982cd038dSYoshinobu Inoue /* 133082cd038dSYoshinobu Inoue * If there is no hop-by-hop options header, allocate new one. 133182cd038dSYoshinobu Inoue * If there is one but it doesn't have enough space to store the 133282cd038dSYoshinobu Inoue * jumbo payload option, allocate a cluster to store the whole options. 133382cd038dSYoshinobu Inoue * Otherwise, use it to store the options. 133482cd038dSYoshinobu Inoue */ 1335155d72c4SPedro F. Giffuni if (exthdrs->ip6e_hbh == NULL) { 133610e5acc3SGleb Smirnoff mopt = m_get(M_NOWAIT, MT_DATA); 133710e5acc3SGleb Smirnoff if (mopt == NULL) 133882cd038dSYoshinobu Inoue return (ENOBUFS); 133982cd038dSYoshinobu Inoue mopt->m_len = JUMBOOPTLEN; 134082cd038dSYoshinobu Inoue optbuf = mtod(mopt, u_char *); 134182cd038dSYoshinobu Inoue optbuf[1] = 0; /* = ((JUMBOOPTLEN) >> 3) - 1 */ 134282cd038dSYoshinobu Inoue exthdrs->ip6e_hbh = mopt; 134382cd038dSYoshinobu Inoue } else { 134482cd038dSYoshinobu Inoue struct ip6_hbh *hbh; 134582cd038dSYoshinobu Inoue 134682cd038dSYoshinobu Inoue mopt = exthdrs->ip6e_hbh; 134782cd038dSYoshinobu Inoue if (M_TRAILINGSPACE(mopt) < JUMBOOPTLEN) { 134833841545SHajimu UMEMOTO /* 134933841545SHajimu UMEMOTO * XXX assumption: 135033841545SHajimu UMEMOTO * - exthdrs->ip6e_hbh is not referenced from places 135133841545SHajimu UMEMOTO * other than exthdrs. 135233841545SHajimu UMEMOTO * - exthdrs->ip6e_hbh is not an mbuf chain. 135333841545SHajimu UMEMOTO */ 135482cd038dSYoshinobu Inoue int oldoptlen = mopt->m_len; 135533841545SHajimu UMEMOTO struct mbuf *n; 135682cd038dSYoshinobu Inoue 135733841545SHajimu UMEMOTO /* 135833841545SHajimu UMEMOTO * XXX: give up if the whole (new) hbh header does 135933841545SHajimu UMEMOTO * not fit even in an mbuf cluster. 136033841545SHajimu UMEMOTO */ 136133841545SHajimu UMEMOTO if (oldoptlen + JUMBOOPTLEN > MCLBYTES) 136282cd038dSYoshinobu Inoue return (ENOBUFS); 136382cd038dSYoshinobu Inoue 136433841545SHajimu UMEMOTO /* 136533841545SHajimu UMEMOTO * As a consequence, we must always prepare a cluster 136633841545SHajimu UMEMOTO * at this point. 136733841545SHajimu UMEMOTO */ 136810e5acc3SGleb Smirnoff n = m_getcl(M_NOWAIT, MT_DATA, 0); 136910e5acc3SGleb Smirnoff if (n == NULL) 137033841545SHajimu UMEMOTO return (ENOBUFS); 137133841545SHajimu UMEMOTO n->m_len = oldoptlen + JUMBOOPTLEN; 137233841545SHajimu UMEMOTO bcopy(mtod(mopt, caddr_t), mtod(n, caddr_t), 137333841545SHajimu UMEMOTO oldoptlen); 137433841545SHajimu UMEMOTO optbuf = mtod(n, caddr_t) + oldoptlen; 137533841545SHajimu UMEMOTO m_freem(mopt); 137633841545SHajimu UMEMOTO mopt = exthdrs->ip6e_hbh = n; 137782cd038dSYoshinobu Inoue } else { 137882cd038dSYoshinobu Inoue optbuf = mtod(mopt, u_char *) + mopt->m_len; 137982cd038dSYoshinobu Inoue mopt->m_len += JUMBOOPTLEN; 138082cd038dSYoshinobu Inoue } 138182cd038dSYoshinobu Inoue optbuf[0] = IP6OPT_PADN; 138282cd038dSYoshinobu Inoue optbuf[1] = 1; 138382cd038dSYoshinobu Inoue 138482cd038dSYoshinobu Inoue /* 138582cd038dSYoshinobu Inoue * Adjust the header length according to the pad and 138682cd038dSYoshinobu Inoue * the jumbo payload option. 138782cd038dSYoshinobu Inoue */ 138882cd038dSYoshinobu Inoue hbh = mtod(mopt, struct ip6_hbh *); 138982cd038dSYoshinobu Inoue hbh->ip6h_len += (JUMBOOPTLEN >> 3); 139082cd038dSYoshinobu Inoue } 139182cd038dSYoshinobu Inoue 139282cd038dSYoshinobu Inoue /* fill in the option. */ 139382cd038dSYoshinobu Inoue optbuf[2] = IP6OPT_JUMBO; 139482cd038dSYoshinobu Inoue optbuf[3] = 4; 139533841545SHajimu UMEMOTO v = (u_int32_t)htonl(plen + JUMBOOPTLEN); 139633841545SHajimu UMEMOTO bcopy(&v, &optbuf[4], sizeof(u_int32_t)); 139782cd038dSYoshinobu Inoue 139882cd038dSYoshinobu Inoue /* finally, adjust the packet header length */ 139982cd038dSYoshinobu Inoue exthdrs->ip6e_ip6->m_pkthdr.len += JUMBOOPTLEN; 140082cd038dSYoshinobu Inoue 140182cd038dSYoshinobu Inoue return (0); 140282cd038dSYoshinobu Inoue #undef JUMBOOPTLEN 140382cd038dSYoshinobu Inoue } 140482cd038dSYoshinobu Inoue 140582cd038dSYoshinobu Inoue /* 140682cd038dSYoshinobu Inoue * Insert fragment header and copy unfragmentable header portions. 140782cd038dSYoshinobu Inoue */ 140882cd038dSYoshinobu Inoue static int 14091272577eSXin LI ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen, 14101272577eSXin LI struct ip6_frag **frghdrp) 141182cd038dSYoshinobu Inoue { 141282cd038dSYoshinobu Inoue struct mbuf *n, *mlast; 141382cd038dSYoshinobu Inoue 141482cd038dSYoshinobu Inoue if (hlen > sizeof(struct ip6_hdr)) { 141582cd038dSYoshinobu Inoue n = m_copym(m0, sizeof(struct ip6_hdr), 1416eb1b1807SGleb Smirnoff hlen - sizeof(struct ip6_hdr), M_NOWAIT); 1417155d72c4SPedro F. Giffuni if (n == NULL) 141882cd038dSYoshinobu Inoue return (ENOBUFS); 141982cd038dSYoshinobu Inoue m->m_next = n; 142082cd038dSYoshinobu Inoue } else 142182cd038dSYoshinobu Inoue n = m; 142282cd038dSYoshinobu Inoue 142382cd038dSYoshinobu Inoue /* Search for the last mbuf of unfragmentable part. */ 142482cd038dSYoshinobu Inoue for (mlast = n; mlast->m_next; mlast = mlast->m_next) 142582cd038dSYoshinobu Inoue ; 142682cd038dSYoshinobu Inoue 1427f0cace5dSRobert Watson if (M_WRITABLE(mlast) && 1428686cdd19SJun-ichiro itojun Hagino M_TRAILINGSPACE(mlast) >= sizeof(struct ip6_frag)) { 142982cd038dSYoshinobu Inoue /* use the trailing space of the last mbuf for the fragment hdr */ 14307efe5d92SHajimu UMEMOTO *frghdrp = (struct ip6_frag *)(mtod(mlast, caddr_t) + 14317efe5d92SHajimu UMEMOTO mlast->m_len); 143282cd038dSYoshinobu Inoue mlast->m_len += sizeof(struct ip6_frag); 143382cd038dSYoshinobu Inoue m->m_pkthdr.len += sizeof(struct ip6_frag); 143482cd038dSYoshinobu Inoue } else { 143582cd038dSYoshinobu Inoue /* allocate a new mbuf for the fragment header */ 143682cd038dSYoshinobu Inoue struct mbuf *mfrg; 143782cd038dSYoshinobu Inoue 143810e5acc3SGleb Smirnoff mfrg = m_get(M_NOWAIT, MT_DATA); 143910e5acc3SGleb Smirnoff if (mfrg == NULL) 144082cd038dSYoshinobu Inoue return (ENOBUFS); 144182cd038dSYoshinobu Inoue mfrg->m_len = sizeof(struct ip6_frag); 144282cd038dSYoshinobu Inoue *frghdrp = mtod(mfrg, struct ip6_frag *); 144382cd038dSYoshinobu Inoue mlast->m_next = mfrg; 144482cd038dSYoshinobu Inoue } 144582cd038dSYoshinobu Inoue 144682cd038dSYoshinobu Inoue return (0); 144782cd038dSYoshinobu Inoue } 144882cd038dSYoshinobu Inoue 14490d4df029SAlexander V. Chernikov /* 14500d4df029SAlexander V. Chernikov * Calculates IPv6 path mtu for destination @dst. 14510d4df029SAlexander V. Chernikov * Resulting MTU is stored in @mtup. 14520d4df029SAlexander V. Chernikov * 14530d4df029SAlexander V. Chernikov * Returns 0 on success. 14540d4df029SAlexander V. Chernikov */ 145531b3783cSHajimu UMEMOTO static int 1456f0937b2cSAndrey V. Elsukov ip6_getpmtu_ctl(u_int fibnum, const struct in6_addr *dst, u_long *mtup) 14570d4df029SAlexander V. Chernikov { 14581483c1c5SAlexander V. Chernikov struct epoch_tracker et; 14591483c1c5SAlexander V. Chernikov struct nhop_object *nh; 1460bacf6684SAlexander V. Chernikov struct in6_addr kdst; 1461bacf6684SAlexander V. Chernikov uint32_t scopeid; 1462bacf6684SAlexander V. Chernikov int error; 14630d4df029SAlexander V. Chernikov 1464bacf6684SAlexander V. Chernikov in6_splitscope(dst, &kdst, &scopeid); 14650d4df029SAlexander V. Chernikov 14661483c1c5SAlexander V. Chernikov NET_EPOCH_ENTER(et); 14671483c1c5SAlexander V. Chernikov nh = fib6_lookup(fibnum, &kdst, scopeid, NHR_NONE, 0); 14681483c1c5SAlexander V. Chernikov if (nh != NULL) 14691483c1c5SAlexander V. Chernikov error = ip6_calcmtu(nh->nh_ifp, dst, nh->nh_mtu, mtup, NULL, 0); 14701483c1c5SAlexander V. Chernikov else 14711483c1c5SAlexander V. Chernikov error = EHOSTUNREACH; 14721483c1c5SAlexander V. Chernikov NET_EPOCH_EXIT(et); 1473bacf6684SAlexander V. Chernikov 1474bacf6684SAlexander V. Chernikov return (error); 14750d4df029SAlexander V. Chernikov } 14760d4df029SAlexander V. Chernikov 14770d4df029SAlexander V. Chernikov /* 14780d4df029SAlexander V. Chernikov * Calculates IPv6 path MTU for @dst based on transmit @ifp, 14790d4df029SAlexander V. Chernikov * and cached data in @ro_pmtu. 14800d4df029SAlexander V. Chernikov * MTU from (successful) route lookup is saved (along with dst) 14810d4df029SAlexander V. Chernikov * inside @ro_pmtu to avoid subsequent route lookups after packet 14820d4df029SAlexander V. Chernikov * filter processing. 14830d4df029SAlexander V. Chernikov * 14840d4df029SAlexander V. Chernikov * Stores mtu and always-frag value into @mtup and @alwaysfragp. 14850d4df029SAlexander V. Chernikov * Returns 0 on success. 14860d4df029SAlexander V. Chernikov */ 14870d4df029SAlexander V. Chernikov static int 14880d4df029SAlexander V. Chernikov ip6_getpmtu(struct route_in6 *ro_pmtu, int do_lookup, 1489f0937b2cSAndrey V. Elsukov struct ifnet *ifp, const struct in6_addr *dst, u_long *mtup, 1490d4c22202SAndrew Gallatin int *alwaysfragp, u_int fibnum, u_int proto) 149131b3783cSHajimu UMEMOTO { 14921483c1c5SAlexander V. Chernikov struct nhop_object *nh; 1493bacf6684SAlexander V. Chernikov struct in6_addr kdst; 1494bacf6684SAlexander V. Chernikov uint32_t scopeid; 1495000c42faSBjoern A. Zeeb struct sockaddr_in6 *sa6_dst, sin6; 14960d4df029SAlexander V. Chernikov u_long mtu; 149731b3783cSHajimu UMEMOTO 14981483c1c5SAlexander V. Chernikov NET_EPOCH_ASSERT(); 14991483c1c5SAlexander V. Chernikov 15000d4df029SAlexander V. Chernikov mtu = 0; 1501000c42faSBjoern A. Zeeb if (ro_pmtu == NULL || do_lookup) { 15020d4df029SAlexander V. Chernikov /* 15030d4df029SAlexander V. Chernikov * Here ro_pmtu has final destination address, while 15040d4df029SAlexander V. Chernikov * ro might represent immediate destination. 15050d4df029SAlexander V. Chernikov * Use ro_pmtu destination since mtu might differ. 15060d4df029SAlexander V. Chernikov */ 1507000c42faSBjoern A. Zeeb if (ro_pmtu != NULL) { 15080d4df029SAlexander V. Chernikov sa6_dst = (struct sockaddr_in6 *)&ro_pmtu->ro_dst; 15090d4df029SAlexander V. Chernikov if (!IN6_ARE_ADDR_EQUAL(&sa6_dst->sin6_addr, dst)) 15100d4df029SAlexander V. Chernikov ro_pmtu->ro_mtu = 0; 1511000c42faSBjoern A. Zeeb } else 1512000c42faSBjoern A. Zeeb sa6_dst = &sin6; 15130d4df029SAlexander V. Chernikov 1514000c42faSBjoern A. Zeeb if (ro_pmtu == NULL || ro_pmtu->ro_mtu == 0) { 151531b3783cSHajimu UMEMOTO bzero(sa6_dst, sizeof(*sa6_dst)); 151631b3783cSHajimu UMEMOTO sa6_dst->sin6_family = AF_INET6; 151731b3783cSHajimu UMEMOTO sa6_dst->sin6_len = sizeof(struct sockaddr_in6); 151831b3783cSHajimu UMEMOTO sa6_dst->sin6_addr = *dst; 151931b3783cSHajimu UMEMOTO 1520bacf6684SAlexander V. Chernikov in6_splitscope(dst, &kdst, &scopeid); 15211483c1c5SAlexander V. Chernikov nh = fib6_lookup(fibnum, &kdst, scopeid, NHR_NONE, 0); 15221483c1c5SAlexander V. Chernikov if (nh != NULL) { 15231483c1c5SAlexander V. Chernikov mtu = nh->nh_mtu; 1524000c42faSBjoern A. Zeeb if (ro_pmtu != NULL) 1525000c42faSBjoern A. Zeeb ro_pmtu->ro_mtu = mtu; 15260d4df029SAlexander V. Chernikov } 1527000c42faSBjoern A. Zeeb } else 1528bacf6684SAlexander V. Chernikov mtu = ro_pmtu->ro_mtu; 15290d4df029SAlexander V. Chernikov } 15300d4df029SAlexander V. Chernikov 1531983066f0SAlexander V. Chernikov if (ro_pmtu != NULL && ro_pmtu->ro_nh != NULL) 1532983066f0SAlexander V. Chernikov mtu = ro_pmtu->ro_nh->nh_mtu; 15330d4df029SAlexander V. Chernikov 1534d4c22202SAndrew Gallatin return (ip6_calcmtu(ifp, dst, mtu, mtup, alwaysfragp, proto)); 15350d4df029SAlexander V. Chernikov } 15360d4df029SAlexander V. Chernikov 15370d4df029SAlexander V. Chernikov /* 15380d4df029SAlexander V. Chernikov * Calculate MTU based on transmit @ifp, route mtu @rt_mtu and 15390d4df029SAlexander V. Chernikov * hostcache data for @dst. 15400d4df029SAlexander V. Chernikov * Stores mtu and always-frag value into @mtup and @alwaysfragp. 15410d4df029SAlexander V. Chernikov * 15420d4df029SAlexander V. Chernikov * Returns 0 on success. 15430d4df029SAlexander V. Chernikov */ 15440d4df029SAlexander V. Chernikov static int 15450d4df029SAlexander V. Chernikov ip6_calcmtu(struct ifnet *ifp, const struct in6_addr *dst, u_long rt_mtu, 1546d4c22202SAndrew Gallatin u_long *mtup, int *alwaysfragp, u_int proto) 15470d4df029SAlexander V. Chernikov { 15480d4df029SAlexander V. Chernikov u_long mtu = 0; 15490d4df029SAlexander V. Chernikov int alwaysfrag = 0; 15500d4df029SAlexander V. Chernikov int error = 0; 15510d4df029SAlexander V. Chernikov 15520d4df029SAlexander V. Chernikov if (rt_mtu > 0) { 155331b3783cSHajimu UMEMOTO u_int32_t ifmtu; 155497d8d152SAndre Oppermann struct in_conninfo inc; 155597d8d152SAndre Oppermann 155697d8d152SAndre Oppermann bzero(&inc, sizeof(inc)); 1557dcdb4371SBjoern A. Zeeb inc.inc_flags |= INC_ISIPV6; 155897d8d152SAndre Oppermann inc.inc6_faddr = *dst; 155931b3783cSHajimu UMEMOTO 156031b3783cSHajimu UMEMOTO ifmtu = IN6_LINKMTU(ifp); 1561d4c22202SAndrew Gallatin 1562d4c22202SAndrew Gallatin /* TCP is known to react to pmtu changes so skip hc */ 1563d4c22202SAndrew Gallatin if (proto != IPPROTO_TCP) 156497d8d152SAndre Oppermann mtu = tcp_hc_getmtu(&inc); 1565d4c22202SAndrew Gallatin 156697d8d152SAndre Oppermann if (mtu) 15670d4df029SAlexander V. Chernikov mtu = min(mtu, rt_mtu); 156897d8d152SAndre Oppermann else 15690d4df029SAlexander V. Chernikov mtu = rt_mtu; 157031b3783cSHajimu UMEMOTO if (mtu == 0) 157131b3783cSHajimu UMEMOTO mtu = ifmtu; 1572f95d4633SHajimu UMEMOTO else if (mtu < IPV6_MMTU) { 1573f95d4633SHajimu UMEMOTO /* 1574f95d4633SHajimu UMEMOTO * RFC2460 section 5, last paragraph: 1575f95d4633SHajimu UMEMOTO * if we record ICMPv6 too big message with 1576f95d4633SHajimu UMEMOTO * mtu < IPV6_MMTU, transmit packets sized IPV6_MMTU 1577f95d4633SHajimu UMEMOTO * or smaller, with framgent header attached. 1578f95d4633SHajimu UMEMOTO * (fragment header is needed regardless from the 1579f95d4633SHajimu UMEMOTO * packet size, for translators to identify packets) 1580f95d4633SHajimu UMEMOTO */ 1581f95d4633SHajimu UMEMOTO alwaysfrag = 1; 1582f95d4633SHajimu UMEMOTO mtu = IPV6_MMTU; 158331b3783cSHajimu UMEMOTO } 158431b3783cSHajimu UMEMOTO } else if (ifp) { 158531b3783cSHajimu UMEMOTO mtu = IN6_LINKMTU(ifp); 158631b3783cSHajimu UMEMOTO } else 158731b3783cSHajimu UMEMOTO error = EHOSTUNREACH; /* XXX */ 158831b3783cSHajimu UMEMOTO 158931b3783cSHajimu UMEMOTO *mtup = mtu; 1590f95d4633SHajimu UMEMOTO if (alwaysfragp) 1591f95d4633SHajimu UMEMOTO *alwaysfragp = alwaysfrag; 159231b3783cSHajimu UMEMOTO return (error); 159331b3783cSHajimu UMEMOTO } 159431b3783cSHajimu UMEMOTO 159582cd038dSYoshinobu Inoue /* 159682cd038dSYoshinobu Inoue * IP6 socket option processing. 159782cd038dSYoshinobu Inoue */ 159882cd038dSYoshinobu Inoue int 15991272577eSXin LI ip6_ctloutput(struct socket *so, struct sockopt *sopt) 160082cd038dSYoshinobu Inoue { 160179ba3952SBjoern A. Zeeb int optdatalen, uproto; 1602f95d4633SHajimu UMEMOTO void *optdata; 16030ecd976eSBjoern A. Zeeb struct inpcb *inp = sotoinpcb(so); 160482cd038dSYoshinobu Inoue int error, optval; 160582cd038dSYoshinobu Inoue int level, op, optname; 160682cd038dSYoshinobu Inoue int optlen; 1607b40ce416SJulian Elischer struct thread *td; 1608c7c0d948SAdrian Chadd #ifdef RSS 1609c7c0d948SAdrian Chadd uint32_t rss_bucket; 1610c7c0d948SAdrian Chadd int retval; 1611c7c0d948SAdrian Chadd #endif 161282cd038dSYoshinobu Inoue 1613aec9c8d5SGeorge V. Neville-Neil /* 1614aec9c8d5SGeorge V. Neville-Neil * Don't use more than a quarter of mbuf clusters. N.B.: 1615aec9c8d5SGeorge V. Neville-Neil * nmbclusters is an int, but nmbclusters * MCLBYTES may overflow 1616aec9c8d5SGeorge V. Neville-Neil * on LP64 architectures, so cast to u_long to avoid undefined 1617aec9c8d5SGeorge V. Neville-Neil * behavior. ILP32 architectures cannot have nmbclusters 1618aec9c8d5SGeorge V. Neville-Neil * large enough to overflow for other reasons. 1619aec9c8d5SGeorge V. Neville-Neil */ 1620aec9c8d5SGeorge V. Neville-Neil #define IPV6_PKTOPTIONS_MBUF_LIMIT ((u_long)nmbclusters * MCLBYTES / 4) 1621aec9c8d5SGeorge V. Neville-Neil 162282cd038dSYoshinobu Inoue level = sopt->sopt_level; 162382cd038dSYoshinobu Inoue op = sopt->sopt_dir; 162482cd038dSYoshinobu Inoue optname = sopt->sopt_name; 162582cd038dSYoshinobu Inoue optlen = sopt->sopt_valsize; 1626b40ce416SJulian Elischer td = sopt->sopt_td; 1627cc29ac7dSRobert Watson error = 0; 1628cc29ac7dSRobert Watson optval = 0; 1629f95d4633SHajimu UMEMOTO uproto = (int)so->so_proto->pr_protocol; 163082cd038dSYoshinobu Inoue 1631fc06cd42SMikolaj Golub if (level != IPPROTO_IPV6) { 1632fc06cd42SMikolaj Golub error = EINVAL; 1633fc06cd42SMikolaj Golub 1634fc06cd42SMikolaj Golub if (sopt->sopt_level == SOL_SOCKET && 1635fc06cd42SMikolaj Golub sopt->sopt_dir == SOPT_SET) { 1636fc06cd42SMikolaj Golub switch (sopt->sopt_name) { 1637fc06cd42SMikolaj Golub case SO_REUSEADDR: 16380ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 1639efdf104bSMikolaj Golub if ((so->so_options & SO_REUSEADDR) != 0) 16400ecd976eSBjoern A. Zeeb inp->inp_flags2 |= INP_REUSEADDR; 1641fc06cd42SMikolaj Golub else 16420ecd976eSBjoern A. Zeeb inp->inp_flags2 &= ~INP_REUSEADDR; 16430ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1644fc06cd42SMikolaj Golub error = 0; 1645fc06cd42SMikolaj Golub break; 1646fc06cd42SMikolaj Golub case SO_REUSEPORT: 16470ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 1648fc06cd42SMikolaj Golub if ((so->so_options & SO_REUSEPORT) != 0) 16490ecd976eSBjoern A. Zeeb inp->inp_flags2 |= INP_REUSEPORT; 1650fc06cd42SMikolaj Golub else 16510ecd976eSBjoern A. Zeeb inp->inp_flags2 &= ~INP_REUSEPORT; 16520ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1653fc06cd42SMikolaj Golub error = 0; 1654fc06cd42SMikolaj Golub break; 16551a43cff9SSean Bruno case SO_REUSEPORT_LB: 16560ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 16571a43cff9SSean Bruno if ((so->so_options & SO_REUSEPORT_LB) != 0) 16580ecd976eSBjoern A. Zeeb inp->inp_flags2 |= INP_REUSEPORT_LB; 16591a43cff9SSean Bruno else 16600ecd976eSBjoern A. Zeeb inp->inp_flags2 &= ~INP_REUSEPORT_LB; 16610ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 16621a43cff9SSean Bruno error = 0; 16631a43cff9SSean Bruno break; 1664ee799639SBjoern A. Zeeb case SO_SETFIB: 16650ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 16660ecd976eSBjoern A. Zeeb inp->inp_inc.inc_fibnum = so->so_fibnum; 16670ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1668ee799639SBjoern A. Zeeb error = 0; 1669ee799639SBjoern A. Zeeb break; 1670f3e7afe2SHans Petter Selasky case SO_MAX_PACING_RATE: 1671f3e7afe2SHans Petter Selasky #ifdef RATELIMIT 16720ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 16730ecd976eSBjoern A. Zeeb inp->inp_flags2 |= INP_RATE_LIMIT_CHANGED; 16740ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1675f3e7afe2SHans Petter Selasky error = 0; 1676f3e7afe2SHans Petter Selasky #else 1677f3e7afe2SHans Petter Selasky error = EOPNOTSUPP; 1678f3e7afe2SHans Petter Selasky #endif 1679f3e7afe2SHans Petter Selasky break; 1680fc06cd42SMikolaj Golub default: 1681fc06cd42SMikolaj Golub break; 1682fc06cd42SMikolaj Golub } 1683fc06cd42SMikolaj Golub } 1684fc06cd42SMikolaj Golub } else { /* level == IPPROTO_IPV6 */ 168582cd038dSYoshinobu Inoue switch (op) { 168682cd038dSYoshinobu Inoue case SOPT_SET: 168782cd038dSYoshinobu Inoue switch (optname) { 1688f95d4633SHajimu UMEMOTO case IPV6_2292PKTOPTIONS: 1689f95d4633SHajimu UMEMOTO #ifdef IPV6_PKTOPTIONS 169082cd038dSYoshinobu Inoue case IPV6_PKTOPTIONS: 1691f95d4633SHajimu UMEMOTO #endif 169282cd038dSYoshinobu Inoue { 169382cd038dSYoshinobu Inoue struct mbuf *m; 169482cd038dSYoshinobu Inoue 1695aec9c8d5SGeorge V. Neville-Neil if (optlen > IPV6_PKTOPTIONS_MBUF_LIMIT) { 1696aec9c8d5SGeorge V. Neville-Neil printf("ip6_ctloutput: mbuf limit hit\n"); 1697aec9c8d5SGeorge V. Neville-Neil error = ENOBUFS; 1698aec9c8d5SGeorge V. Neville-Neil break; 1699aec9c8d5SGeorge V. Neville-Neil } 1700aec9c8d5SGeorge V. Neville-Neil 170182cd038dSYoshinobu Inoue error = soopt_getm(sopt, &m); /* XXX */ 1702a89ec05eSPeter Wemm if (error != 0) 170382cd038dSYoshinobu Inoue break; 170482cd038dSYoshinobu Inoue error = soopt_mcopyin(sopt, m); /* XXX */ 1705a89ec05eSPeter Wemm if (error != 0) 170682cd038dSYoshinobu Inoue break; 1707e02582d1SMark Johnston INP_WLOCK(inp); 1708e02582d1SMark Johnston error = ip6_pcbopts(&inp->in6p_outputopts, m, 1709e02582d1SMark Johnston so, sopt); 1710e02582d1SMark Johnston INP_WUNLOCK(inp); 171133841545SHajimu UMEMOTO m_freem(m); /* XXX */ 171282cd038dSYoshinobu Inoue break; 171382cd038dSYoshinobu Inoue } 171433841545SHajimu UMEMOTO 171533841545SHajimu UMEMOTO /* 171633841545SHajimu UMEMOTO * Use of some Hop-by-Hop options or some 171733841545SHajimu UMEMOTO * Destination options, might require special 171833841545SHajimu UMEMOTO * privilege. That is, normal applications 171933841545SHajimu UMEMOTO * (without special privilege) might be forbidden 172033841545SHajimu UMEMOTO * from setting certain options in outgoing packets, 172133841545SHajimu UMEMOTO * and might never see certain options in received 172233841545SHajimu UMEMOTO * packets. [RFC 2292 Section 6] 172333841545SHajimu UMEMOTO * KAME specific note: 172433841545SHajimu UMEMOTO * KAME prevents non-privileged users from sending or 172533841545SHajimu UMEMOTO * receiving ANY hbh/dst options in order to avoid 172633841545SHajimu UMEMOTO * overhead of parsing options in the kernel. 172733841545SHajimu UMEMOTO */ 1728f95d4633SHajimu UMEMOTO case IPV6_RECVHOPOPTS: 1729f95d4633SHajimu UMEMOTO case IPV6_RECVDSTOPTS: 1730f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDRDSTOPTS: 173179ba3952SBjoern A. Zeeb if (td != NULL) { 173279ba3952SBjoern A. Zeeb error = priv_check(td, 173379ba3952SBjoern A. Zeeb PRIV_NETINET_SETHDROPTS); 173479ba3952SBjoern A. Zeeb if (error) 1735f95d4633SHajimu UMEMOTO break; 1736f95d4633SHajimu UMEMOTO } 1737f95d4633SHajimu UMEMOTO /* FALLTHROUGH */ 173882cd038dSYoshinobu Inoue case IPV6_UNICAST_HOPS: 1739f95d4633SHajimu UMEMOTO case IPV6_HOPLIMIT: 174033841545SHajimu UMEMOTO 1741f95d4633SHajimu UMEMOTO case IPV6_RECVPKTINFO: 1742f95d4633SHajimu UMEMOTO case IPV6_RECVHOPLIMIT: 1743f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDR: 1744f95d4633SHajimu UMEMOTO case IPV6_RECVPATHMTU: 1745f95d4633SHajimu UMEMOTO case IPV6_RECVTCLASS: 174668bb8d62SAdrian Chadd case IPV6_RECVFLOWID: 174768bb8d62SAdrian Chadd #ifdef RSS 174868bb8d62SAdrian Chadd case IPV6_RECVRSSBUCKETID: 174968bb8d62SAdrian Chadd #endif 175033841545SHajimu UMEMOTO case IPV6_V6ONLY: 1751f95d4633SHajimu UMEMOTO case IPV6_AUTOFLOWLABEL: 1752dce33a45SErmal Luçi case IPV6_ORIGDSTADDR: 1753f44270e7SPawel Jakub Dawidek case IPV6_BINDANY: 1754c7c0d948SAdrian Chadd case IPV6_BINDMULTI: 1755c7c0d948SAdrian Chadd #ifdef RSS 1756c7c0d948SAdrian Chadd case IPV6_RSS_LISTEN_BUCKET: 1757c7c0d948SAdrian Chadd #endif 1758868aabb4SRichard Scheffenegger case IPV6_VLAN_PCP: 1759f44270e7SPawel Jakub Dawidek if (optname == IPV6_BINDANY && td != NULL) { 1760f44270e7SPawel Jakub Dawidek error = priv_check(td, 1761f44270e7SPawel Jakub Dawidek PRIV_NETINET_BINDANY); 1762f44270e7SPawel Jakub Dawidek if (error) 1763f44270e7SPawel Jakub Dawidek break; 1764f44270e7SPawel Jakub Dawidek } 1765f44270e7SPawel Jakub Dawidek 176633841545SHajimu UMEMOTO if (optlen != sizeof(int)) { 176782cd038dSYoshinobu Inoue error = EINVAL; 176833841545SHajimu UMEMOTO break; 176933841545SHajimu UMEMOTO } 177082cd038dSYoshinobu Inoue error = sooptcopyin(sopt, &optval, 177182cd038dSYoshinobu Inoue sizeof optval, sizeof optval); 177282cd038dSYoshinobu Inoue if (error) 177382cd038dSYoshinobu Inoue break; 177482cd038dSYoshinobu Inoue switch (optname) { 177582cd038dSYoshinobu Inoue case IPV6_UNICAST_HOPS: 177682cd038dSYoshinobu Inoue if (optval < -1 || optval >= 256) 177782cd038dSYoshinobu Inoue error = EINVAL; 177882cd038dSYoshinobu Inoue else { 177982cd038dSYoshinobu Inoue /* -1 = kernel default */ 17800ecd976eSBjoern A. Zeeb inp->in6p_hops = optval; 17810ecd976eSBjoern A. Zeeb if ((inp->inp_vflag & 178282cd038dSYoshinobu Inoue INP_IPV4) != 0) 17830ecd976eSBjoern A. Zeeb inp->inp_ip_ttl = optval; 178482cd038dSYoshinobu Inoue } 178582cd038dSYoshinobu Inoue break; 178682cd038dSYoshinobu Inoue #define OPTSET(bit) \ 178733841545SHajimu UMEMOTO do { \ 17880ecd976eSBjoern A. Zeeb INP_WLOCK(inp); \ 178982cd038dSYoshinobu Inoue if (optval) \ 17900ecd976eSBjoern A. Zeeb inp->inp_flags |= (bit); \ 179182cd038dSYoshinobu Inoue else \ 17920ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(bit); \ 17930ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); \ 17947efe5d92SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 1795f95d4633SHajimu UMEMOTO #define OPTSET2292(bit) \ 1796f95d4633SHajimu UMEMOTO do { \ 17970ecd976eSBjoern A. Zeeb INP_WLOCK(inp); \ 17980ecd976eSBjoern A. Zeeb inp->inp_flags |= IN6P_RFC2292; \ 1799f95d4633SHajimu UMEMOTO if (optval) \ 18000ecd976eSBjoern A. Zeeb inp->inp_flags |= (bit); \ 1801f95d4633SHajimu UMEMOTO else \ 18020ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(bit); \ 18030ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); \ 1804f95d4633SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 18050ecd976eSBjoern A. Zeeb #define OPTBIT(bit) (inp->inp_flags & (bit) ? 1 : 0) 180682cd038dSYoshinobu Inoue 180737d4fc1eSSean Bruno #define OPTSET2_N(bit, val) do { \ 1808c7c0d948SAdrian Chadd if (val) \ 18090ecd976eSBjoern A. Zeeb inp->inp_flags2 |= bit; \ 1810c7c0d948SAdrian Chadd else \ 18110ecd976eSBjoern A. Zeeb inp->inp_flags2 &= ~bit; \ 181237d4fc1eSSean Bruno } while (0) 181337d4fc1eSSean Bruno #define OPTSET2(bit, val) do { \ 18140ecd976eSBjoern A. Zeeb INP_WLOCK(inp); \ 181537d4fc1eSSean Bruno OPTSET2_N(bit, val); \ 18160ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); \ 1817c7c0d948SAdrian Chadd } while (0) 18180ecd976eSBjoern A. Zeeb #define OPTBIT2(bit) (inp->inp_flags2 & (bit) ? 1 : 0) 181937d4fc1eSSean Bruno #define OPTSET2292_EXCLUSIVE(bit) \ 182037d4fc1eSSean Bruno do { \ 18210ecd976eSBjoern A. Zeeb INP_WLOCK(inp); \ 182237d4fc1eSSean Bruno if (OPTBIT(IN6P_RFC2292)) { \ 182337d4fc1eSSean Bruno error = EINVAL; \ 182437d4fc1eSSean Bruno } else { \ 182537d4fc1eSSean Bruno if (optval) \ 18260ecd976eSBjoern A. Zeeb inp->inp_flags |= (bit); \ 182737d4fc1eSSean Bruno else \ 18280ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(bit); \ 182937d4fc1eSSean Bruno } \ 18300ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); \ 183137d4fc1eSSean Bruno } while (/*CONSTCOND*/ 0) 1832c7c0d948SAdrian Chadd 1833f95d4633SHajimu UMEMOTO case IPV6_RECVPKTINFO: 183437d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_PKTINFO); 1835f95d4633SHajimu UMEMOTO break; 1836f95d4633SHajimu UMEMOTO 1837f95d4633SHajimu UMEMOTO case IPV6_HOPLIMIT: 1838f95d4633SHajimu UMEMOTO { 1839f95d4633SHajimu UMEMOTO struct ip6_pktopts **optp; 1840f95d4633SHajimu UMEMOTO 1841f95d4633SHajimu UMEMOTO /* cannot mix with RFC2292 */ 1842f95d4633SHajimu UMEMOTO if (OPTBIT(IN6P_RFC2292)) { 1843f95d4633SHajimu UMEMOTO error = EINVAL; 1844f95d4633SHajimu UMEMOTO break; 1845f95d4633SHajimu UMEMOTO } 18460ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 1847*53af6903SGleb Smirnoff if (inp->inp_flags & INP_DROPPED) { 18480ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 184956713d16SMatt Macy return (ECONNRESET); 185056713d16SMatt Macy } 18510ecd976eSBjoern A. Zeeb optp = &inp->in6p_outputopts; 1852f95d4633SHajimu UMEMOTO error = ip6_pcbopt(IPV6_HOPLIMIT, 185379ba3952SBjoern A. Zeeb (u_char *)&optval, sizeof(optval), 185479ba3952SBjoern A. Zeeb optp, (td != NULL) ? td->td_ucred : 185579ba3952SBjoern A. Zeeb NULL, uproto); 18560ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1857f95d4633SHajimu UMEMOTO break; 1858f95d4633SHajimu UMEMOTO } 1859f95d4633SHajimu UMEMOTO 1860f95d4633SHajimu UMEMOTO case IPV6_RECVHOPLIMIT: 186137d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_HOPLIMIT); 1862f95d4633SHajimu UMEMOTO break; 1863f95d4633SHajimu UMEMOTO 1864f95d4633SHajimu UMEMOTO case IPV6_RECVHOPOPTS: 186537d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_HOPOPTS); 1866f95d4633SHajimu UMEMOTO break; 1867f95d4633SHajimu UMEMOTO 1868f95d4633SHajimu UMEMOTO case IPV6_RECVDSTOPTS: 186937d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_DSTOPTS); 1870f95d4633SHajimu UMEMOTO break; 1871f95d4633SHajimu UMEMOTO 1872f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDRDSTOPTS: 187337d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_RTHDRDSTOPTS); 1874f95d4633SHajimu UMEMOTO break; 1875f95d4633SHajimu UMEMOTO 1876f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDR: 187737d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_RTHDR); 187882cd038dSYoshinobu Inoue break; 187982cd038dSYoshinobu Inoue 1880f95d4633SHajimu UMEMOTO case IPV6_RECVPATHMTU: 1881f95d4633SHajimu UMEMOTO /* 1882f95d4633SHajimu UMEMOTO * We ignore this option for TCP 1883f95d4633SHajimu UMEMOTO * sockets. 188418b35df8SHajimu UMEMOTO * (RFC3542 leaves this case 1885f95d4633SHajimu UMEMOTO * unspecified.) 1886f95d4633SHajimu UMEMOTO */ 1887f95d4633SHajimu UMEMOTO if (uproto != IPPROTO_TCP) 1888f95d4633SHajimu UMEMOTO OPTSET(IN6P_MTU); 1889f95d4633SHajimu UMEMOTO break; 1890f95d4633SHajimu UMEMOTO 189168bb8d62SAdrian Chadd case IPV6_RECVFLOWID: 189268bb8d62SAdrian Chadd OPTSET2(INP_RECVFLOWID, optval); 189368bb8d62SAdrian Chadd break; 189468bb8d62SAdrian Chadd 189568bb8d62SAdrian Chadd #ifdef RSS 189668bb8d62SAdrian Chadd case IPV6_RECVRSSBUCKETID: 189768bb8d62SAdrian Chadd OPTSET2(INP_RECVRSSBUCKETID, optval); 189868bb8d62SAdrian Chadd break; 189968bb8d62SAdrian Chadd #endif 190068bb8d62SAdrian Chadd 190133841545SHajimu UMEMOTO case IPV6_V6ONLY: 1902cb49ec54SMark Johnston INP_WLOCK(inp); 19030ecd976eSBjoern A. Zeeb if (inp->inp_lport || 19040ecd976eSBjoern A. Zeeb !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1905cb49ec54SMark Johnston /* 1906cb49ec54SMark Johnston * The socket is already bound. 1907cb49ec54SMark Johnston */ 1908cb49ec54SMark Johnston INP_WUNLOCK(inp); 19090554093bSHajimu UMEMOTO error = EINVAL; 19100554093bSHajimu UMEMOTO break; 19110554093bSHajimu UMEMOTO } 1912cb49ec54SMark Johnston if (optval) { 1913cb49ec54SMark Johnston inp->inp_flags |= IN6P_IPV6_V6ONLY; 19140ecd976eSBjoern A. Zeeb inp->inp_vflag &= ~INP_IPV4; 1915cb49ec54SMark Johnston } else { 1916cb49ec54SMark Johnston inp->inp_flags &= ~IN6P_IPV6_V6ONLY; 19170ecd976eSBjoern A. Zeeb inp->inp_vflag |= INP_IPV4; 1918cb49ec54SMark Johnston } 1919cb49ec54SMark Johnston INP_WUNLOCK(inp); 192082cd038dSYoshinobu Inoue break; 1921f95d4633SHajimu UMEMOTO case IPV6_RECVTCLASS: 1922f95d4633SHajimu UMEMOTO /* cannot mix with RFC2292 XXX */ 192337d4fc1eSSean Bruno OPTSET2292_EXCLUSIVE(IN6P_TCLASS); 1924f95d4633SHajimu UMEMOTO break; 1925f95d4633SHajimu UMEMOTO case IPV6_AUTOFLOWLABEL: 1926f95d4633SHajimu UMEMOTO OPTSET(IN6P_AUTOFLOWLABEL); 1927f95d4633SHajimu UMEMOTO break; 1928f95d4633SHajimu UMEMOTO 1929dce33a45SErmal Luçi case IPV6_ORIGDSTADDR: 1930dce33a45SErmal Luçi OPTSET2(INP_ORIGDSTADDR, optval); 1931dce33a45SErmal Luçi break; 1932f44270e7SPawel Jakub Dawidek case IPV6_BINDANY: 1933f44270e7SPawel Jakub Dawidek OPTSET(INP_BINDANY); 1934f44270e7SPawel Jakub Dawidek break; 1935c7c0d948SAdrian Chadd 1936c7c0d948SAdrian Chadd case IPV6_BINDMULTI: 1937c7c0d948SAdrian Chadd OPTSET2(INP_BINDMULTI, optval); 1938c7c0d948SAdrian Chadd break; 1939c7c0d948SAdrian Chadd #ifdef RSS 1940c7c0d948SAdrian Chadd case IPV6_RSS_LISTEN_BUCKET: 1941c7c0d948SAdrian Chadd if ((optval >= 0) && 1942c7c0d948SAdrian Chadd (optval < rss_getnumbuckets())) { 19430ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 19440ecd976eSBjoern A. Zeeb inp->inp_rss_listen_bucket = optval; 194537d4fc1eSSean Bruno OPTSET2_N(INP_RSS_BUCKET_SET, 1); 19460ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 1947c7c0d948SAdrian Chadd } else { 1948c7c0d948SAdrian Chadd error = EINVAL; 1949c7c0d948SAdrian Chadd } 1950c7c0d948SAdrian Chadd break; 1951c7c0d948SAdrian Chadd #endif 1952868aabb4SRichard Scheffenegger case IPV6_VLAN_PCP: 1953868aabb4SRichard Scheffenegger if ((optval >= -1) && (optval <= 1954868aabb4SRichard Scheffenegger (INP_2PCP_MASK >> INP_2PCP_SHIFT))) { 1955868aabb4SRichard Scheffenegger if (optval == -1) { 1956868aabb4SRichard Scheffenegger INP_WLOCK(inp); 1957868aabb4SRichard Scheffenegger inp->inp_flags2 &= 1958868aabb4SRichard Scheffenegger ~(INP_2PCP_SET | 1959868aabb4SRichard Scheffenegger INP_2PCP_MASK); 1960868aabb4SRichard Scheffenegger INP_WUNLOCK(inp); 1961868aabb4SRichard Scheffenegger } else { 1962868aabb4SRichard Scheffenegger INP_WLOCK(inp); 1963868aabb4SRichard Scheffenegger inp->inp_flags2 |= 1964868aabb4SRichard Scheffenegger INP_2PCP_SET; 1965868aabb4SRichard Scheffenegger inp->inp_flags2 &= 1966868aabb4SRichard Scheffenegger ~INP_2PCP_MASK; 1967868aabb4SRichard Scheffenegger inp->inp_flags2 |= 1968868aabb4SRichard Scheffenegger optval << 1969868aabb4SRichard Scheffenegger INP_2PCP_SHIFT; 1970868aabb4SRichard Scheffenegger INP_WUNLOCK(inp); 1971868aabb4SRichard Scheffenegger } 1972868aabb4SRichard Scheffenegger } else 1973868aabb4SRichard Scheffenegger error = EINVAL; 1974868aabb4SRichard Scheffenegger break; 197582cd038dSYoshinobu Inoue } 197633841545SHajimu UMEMOTO break; 197733841545SHajimu UMEMOTO 1978f95d4633SHajimu UMEMOTO case IPV6_TCLASS: 1979f95d4633SHajimu UMEMOTO case IPV6_DONTFRAG: 1980f95d4633SHajimu UMEMOTO case IPV6_USE_MIN_MTU: 1981f95d4633SHajimu UMEMOTO case IPV6_PREFER_TEMPADDR: 1982f95d4633SHajimu UMEMOTO if (optlen != sizeof(optval)) { 1983f95d4633SHajimu UMEMOTO error = EINVAL; 1984f95d4633SHajimu UMEMOTO break; 1985f95d4633SHajimu UMEMOTO } 1986f95d4633SHajimu UMEMOTO error = sooptcopyin(sopt, &optval, 1987f95d4633SHajimu UMEMOTO sizeof optval, sizeof optval); 1988f95d4633SHajimu UMEMOTO if (error) 1989f95d4633SHajimu UMEMOTO break; 1990f95d4633SHajimu UMEMOTO { 1991f95d4633SHajimu UMEMOTO struct ip6_pktopts **optp; 19920ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 1993*53af6903SGleb Smirnoff if (inp->inp_flags & INP_DROPPED) { 19940ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 199556713d16SMatt Macy return (ECONNRESET); 199656713d16SMatt Macy } 19970ecd976eSBjoern A. Zeeb optp = &inp->in6p_outputopts; 1998f95d4633SHajimu UMEMOTO error = ip6_pcbopt(optname, 199979ba3952SBjoern A. Zeeb (u_char *)&optval, sizeof(optval), 200079ba3952SBjoern A. Zeeb optp, (td != NULL) ? td->td_ucred : 200179ba3952SBjoern A. Zeeb NULL, uproto); 20020ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 2003f95d4633SHajimu UMEMOTO break; 2004f95d4633SHajimu UMEMOTO } 2005f95d4633SHajimu UMEMOTO 2006f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 2007f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 2008f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 2009f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 2010f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 201133841545SHajimu UMEMOTO /* RFC 2292 */ 201233841545SHajimu UMEMOTO if (optlen != sizeof(int)) { 201333841545SHajimu UMEMOTO error = EINVAL; 201433841545SHajimu UMEMOTO break; 201533841545SHajimu UMEMOTO } 201633841545SHajimu UMEMOTO error = sooptcopyin(sopt, &optval, 201733841545SHajimu UMEMOTO sizeof optval, sizeof optval); 201833841545SHajimu UMEMOTO if (error) 201933841545SHajimu UMEMOTO break; 202033841545SHajimu UMEMOTO switch (optname) { 2021f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 2022f95d4633SHajimu UMEMOTO OPTSET2292(IN6P_PKTINFO); 202333841545SHajimu UMEMOTO break; 2024f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 2025f95d4633SHajimu UMEMOTO OPTSET2292(IN6P_HOPLIMIT); 202633841545SHajimu UMEMOTO break; 2027f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 202833841545SHajimu UMEMOTO /* 202933841545SHajimu UMEMOTO * Check super-user privilege. 203033841545SHajimu UMEMOTO * See comments for IPV6_RECVHOPOPTS. 203133841545SHajimu UMEMOTO */ 203279ba3952SBjoern A. Zeeb if (td != NULL) { 203379ba3952SBjoern A. Zeeb error = priv_check(td, 203479ba3952SBjoern A. Zeeb PRIV_NETINET_SETHDROPTS); 203579ba3952SBjoern A. Zeeb if (error) 203679ba3952SBjoern A. Zeeb return (error); 203779ba3952SBjoern A. Zeeb } 2038f95d4633SHajimu UMEMOTO OPTSET2292(IN6P_HOPOPTS); 203933841545SHajimu UMEMOTO break; 2040f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 204179ba3952SBjoern A. Zeeb if (td != NULL) { 204279ba3952SBjoern A. Zeeb error = priv_check(td, 204379ba3952SBjoern A. Zeeb PRIV_NETINET_SETHDROPTS); 204479ba3952SBjoern A. Zeeb if (error) 204579ba3952SBjoern A. Zeeb return (error); 204679ba3952SBjoern A. Zeeb } 2047f95d4633SHajimu UMEMOTO OPTSET2292(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); /* XXX */ 204833841545SHajimu UMEMOTO break; 2049f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 2050f95d4633SHajimu UMEMOTO OPTSET2292(IN6P_RTHDR); 205133841545SHajimu UMEMOTO break; 205282cd038dSYoshinobu Inoue } 205382cd038dSYoshinobu Inoue break; 2054f95d4633SHajimu UMEMOTO case IPV6_PKTINFO: 2055f95d4633SHajimu UMEMOTO case IPV6_HOPOPTS: 2056f95d4633SHajimu UMEMOTO case IPV6_RTHDR: 2057f95d4633SHajimu UMEMOTO case IPV6_DSTOPTS: 2058f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 2059f95d4633SHajimu UMEMOTO case IPV6_NEXTHOP: 2060f95d4633SHajimu UMEMOTO { 206118b35df8SHajimu UMEMOTO /* new advanced API (RFC3542) */ 2062f95d4633SHajimu UMEMOTO u_char *optbuf; 2063e770771aSHajimu UMEMOTO u_char optbuf_storage[MCLBYTES]; 2064f95d4633SHajimu UMEMOTO int optlen; 2065f95d4633SHajimu UMEMOTO struct ip6_pktopts **optp; 2066f95d4633SHajimu UMEMOTO 206772bfa0bfSSean Bruno /* cannot mix with RFC2292 */ 206872bfa0bfSSean Bruno if (OPTBIT(IN6P_RFC2292)) { 206972bfa0bfSSean Bruno error = EINVAL; 207072bfa0bfSSean Bruno break; 207172bfa0bfSSean Bruno } 207272bfa0bfSSean Bruno 2073e770771aSHajimu UMEMOTO /* 2074e770771aSHajimu UMEMOTO * We only ensure valsize is not too large 2075e770771aSHajimu UMEMOTO * here. Further validation will be done 2076e770771aSHajimu UMEMOTO * later. 2077e770771aSHajimu UMEMOTO */ 2078e770771aSHajimu UMEMOTO error = sooptcopyin(sopt, optbuf_storage, 2079e770771aSHajimu UMEMOTO sizeof(optbuf_storage), 0); 2080a5d1aae3SHajimu UMEMOTO if (error) 2081a5d1aae3SHajimu UMEMOTO break; 2082f95d4633SHajimu UMEMOTO optlen = sopt->sopt_valsize; 2083e770771aSHajimu UMEMOTO optbuf = optbuf_storage; 20840ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 2085*53af6903SGleb Smirnoff if (inp->inp_flags & INP_DROPPED) { 20860ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 208756713d16SMatt Macy return (ECONNRESET); 208856713d16SMatt Macy } 20890ecd976eSBjoern A. Zeeb optp = &inp->in6p_outputopts; 209079ba3952SBjoern A. Zeeb error = ip6_pcbopt(optname, optbuf, optlen, 209179ba3952SBjoern A. Zeeb optp, (td != NULL) ? td->td_ucred : NULL, 209279ba3952SBjoern A. Zeeb uproto); 20930ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 2094f95d4633SHajimu UMEMOTO break; 2095f95d4633SHajimu UMEMOTO } 209682cd038dSYoshinobu Inoue #undef OPTSET 209782cd038dSYoshinobu Inoue 209882cd038dSYoshinobu Inoue case IPV6_MULTICAST_IF: 209982cd038dSYoshinobu Inoue case IPV6_MULTICAST_HOPS: 210082cd038dSYoshinobu Inoue case IPV6_MULTICAST_LOOP: 210182cd038dSYoshinobu Inoue case IPV6_JOIN_GROUP: 210282cd038dSYoshinobu Inoue case IPV6_LEAVE_GROUP: 210333cde130SBruce M Simpson case IPV6_MSFILTER: 210433cde130SBruce M Simpson case MCAST_BLOCK_SOURCE: 210533cde130SBruce M Simpson case MCAST_UNBLOCK_SOURCE: 210633cde130SBruce M Simpson case MCAST_JOIN_GROUP: 210733cde130SBruce M Simpson case MCAST_LEAVE_GROUP: 210833cde130SBruce M Simpson case MCAST_JOIN_SOURCE_GROUP: 210933cde130SBruce M Simpson case MCAST_LEAVE_SOURCE_GROUP: 21100ecd976eSBjoern A. Zeeb error = ip6_setmoptions(inp, sopt); 211182cd038dSYoshinobu Inoue break; 211282cd038dSYoshinobu Inoue 211382cd038dSYoshinobu Inoue case IPV6_PORTRANGE: 2114686cdd19SJun-ichiro itojun Hagino error = sooptcopyin(sopt, &optval, 2115686cdd19SJun-ichiro itojun Hagino sizeof optval, sizeof optval); 211682cd038dSYoshinobu Inoue if (error) 211782cd038dSYoshinobu Inoue break; 211882cd038dSYoshinobu Inoue 21190ecd976eSBjoern A. Zeeb INP_WLOCK(inp); 212082cd038dSYoshinobu Inoue switch (optval) { 212182cd038dSYoshinobu Inoue case IPV6_PORTRANGE_DEFAULT: 21220ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(INP_LOWPORT); 21230ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(INP_HIGHPORT); 212482cd038dSYoshinobu Inoue break; 212582cd038dSYoshinobu Inoue 212682cd038dSYoshinobu Inoue case IPV6_PORTRANGE_HIGH: 21270ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(INP_LOWPORT); 21280ecd976eSBjoern A. Zeeb inp->inp_flags |= INP_HIGHPORT; 212982cd038dSYoshinobu Inoue break; 213082cd038dSYoshinobu Inoue 213182cd038dSYoshinobu Inoue case IPV6_PORTRANGE_LOW: 21320ecd976eSBjoern A. Zeeb inp->inp_flags &= ~(INP_HIGHPORT); 21330ecd976eSBjoern A. Zeeb inp->inp_flags |= INP_LOWPORT; 213482cd038dSYoshinobu Inoue break; 213582cd038dSYoshinobu Inoue 213682cd038dSYoshinobu Inoue default: 213782cd038dSYoshinobu Inoue error = EINVAL; 213882cd038dSYoshinobu Inoue break; 213982cd038dSYoshinobu Inoue } 21400ecd976eSBjoern A. Zeeb INP_WUNLOCK(inp); 214182cd038dSYoshinobu Inoue break; 214282cd038dSYoshinobu Inoue 2143fcf59617SAndrey V. Elsukov #if defined(IPSEC) || defined(IPSEC_SUPPORT) 214482cd038dSYoshinobu Inoue case IPV6_IPSEC_POLICY: 2145fcf59617SAndrey V. Elsukov if (IPSEC_ENABLED(ipv6)) { 21460ecd976eSBjoern A. Zeeb error = IPSEC_PCBCTL(ipv6, inp, sopt); 214782cd038dSYoshinobu Inoue break; 2148c26fe973SBjoern A. Zeeb } 2149fcf59617SAndrey V. Elsukov /* FALLTHROUGH */ 2150b2630c29SGeorge V. Neville-Neil #endif /* IPSEC */ 215182cd038dSYoshinobu Inoue 215282cd038dSYoshinobu Inoue default: 215382cd038dSYoshinobu Inoue error = ENOPROTOOPT; 215482cd038dSYoshinobu Inoue break; 215582cd038dSYoshinobu Inoue } 215682cd038dSYoshinobu Inoue break; 215782cd038dSYoshinobu Inoue 215882cd038dSYoshinobu Inoue case SOPT_GET: 215982cd038dSYoshinobu Inoue switch (optname) { 2160f95d4633SHajimu UMEMOTO case IPV6_2292PKTOPTIONS: 2161f95d4633SHajimu UMEMOTO #ifdef IPV6_PKTOPTIONS 216282cd038dSYoshinobu Inoue case IPV6_PKTOPTIONS: 2163f95d4633SHajimu UMEMOTO #endif 2164f95d4633SHajimu UMEMOTO /* 2165f95d4633SHajimu UMEMOTO * RFC3542 (effectively) deprecated the 2166f95d4633SHajimu UMEMOTO * semantics of the 2292-style pktoptions. 2167f95d4633SHajimu UMEMOTO * Since it was not reliable in nature (i.e., 2168f95d4633SHajimu UMEMOTO * applications had to expect the lack of some 2169f95d4633SHajimu UMEMOTO * information after all), it would make sense 2170f95d4633SHajimu UMEMOTO * to simplify this part by always returning 2171f95d4633SHajimu UMEMOTO * empty data. 2172f95d4633SHajimu UMEMOTO */ 217382cd038dSYoshinobu Inoue sopt->sopt_valsize = 0; 217482cd038dSYoshinobu Inoue break; 217582cd038dSYoshinobu Inoue 2176f95d4633SHajimu UMEMOTO case IPV6_RECVHOPOPTS: 2177f95d4633SHajimu UMEMOTO case IPV6_RECVDSTOPTS: 2178f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDRDSTOPTS: 217982cd038dSYoshinobu Inoue case IPV6_UNICAST_HOPS: 2180f95d4633SHajimu UMEMOTO case IPV6_RECVPKTINFO: 2181f95d4633SHajimu UMEMOTO case IPV6_RECVHOPLIMIT: 2182f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDR: 2183f95d4633SHajimu UMEMOTO case IPV6_RECVPATHMTU: 218433841545SHajimu UMEMOTO 218533841545SHajimu UMEMOTO case IPV6_V6ONLY: 2186fa310a7eSYoshinobu Inoue case IPV6_PORTRANGE: 2187f95d4633SHajimu UMEMOTO case IPV6_RECVTCLASS: 2188f95d4633SHajimu UMEMOTO case IPV6_AUTOFLOWLABEL: 21895f6bf451SAttilio Rao case IPV6_BINDANY: 2190c7c0d948SAdrian Chadd case IPV6_FLOWID: 2191c7c0d948SAdrian Chadd case IPV6_FLOWTYPE: 219268bb8d62SAdrian Chadd case IPV6_RECVFLOWID: 2193c7c0d948SAdrian Chadd #ifdef RSS 2194c7c0d948SAdrian Chadd case IPV6_RSSBUCKETID: 219568bb8d62SAdrian Chadd case IPV6_RECVRSSBUCKETID: 2196c7c0d948SAdrian Chadd #endif 2197912568c8SJonathan T. Looney case IPV6_BINDMULTI: 2198868aabb4SRichard Scheffenegger case IPV6_VLAN_PCP: 219982cd038dSYoshinobu Inoue switch (optname) { 2200f95d4633SHajimu UMEMOTO case IPV6_RECVHOPOPTS: 2201f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_HOPOPTS); 2202f95d4633SHajimu UMEMOTO break; 2203f95d4633SHajimu UMEMOTO 2204f95d4633SHajimu UMEMOTO case IPV6_RECVDSTOPTS: 2205f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_DSTOPTS); 2206f95d4633SHajimu UMEMOTO break; 2207f95d4633SHajimu UMEMOTO 2208f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDRDSTOPTS: 2209f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_RTHDRDSTOPTS); 2210f95d4633SHajimu UMEMOTO break; 2211f95d4633SHajimu UMEMOTO 221282cd038dSYoshinobu Inoue case IPV6_UNICAST_HOPS: 22130ecd976eSBjoern A. Zeeb optval = inp->in6p_hops; 221482cd038dSYoshinobu Inoue break; 221582cd038dSYoshinobu Inoue 2216f95d4633SHajimu UMEMOTO case IPV6_RECVPKTINFO: 2217f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_PKTINFO); 2218f95d4633SHajimu UMEMOTO break; 2219f95d4633SHajimu UMEMOTO 2220f95d4633SHajimu UMEMOTO case IPV6_RECVHOPLIMIT: 2221f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_HOPLIMIT); 2222f95d4633SHajimu UMEMOTO break; 2223f95d4633SHajimu UMEMOTO 2224f95d4633SHajimu UMEMOTO case IPV6_RECVRTHDR: 2225f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_RTHDR); 2226f95d4633SHajimu UMEMOTO break; 2227f95d4633SHajimu UMEMOTO 2228f95d4633SHajimu UMEMOTO case IPV6_RECVPATHMTU: 2229f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_MTU); 223082cd038dSYoshinobu Inoue break; 223182cd038dSYoshinobu Inoue 223233841545SHajimu UMEMOTO case IPV6_V6ONLY: 2233854d3b19SHajimu UMEMOTO optval = OPTBIT(IN6P_IPV6_V6ONLY); 223482cd038dSYoshinobu Inoue break; 223582cd038dSYoshinobu Inoue 223682cd038dSYoshinobu Inoue case IPV6_PORTRANGE: 223782cd038dSYoshinobu Inoue { 223882cd038dSYoshinobu Inoue int flags; 22390ecd976eSBjoern A. Zeeb flags = inp->inp_flags; 224097590249SBjoern A. Zeeb if (flags & INP_HIGHPORT) 224182cd038dSYoshinobu Inoue optval = IPV6_PORTRANGE_HIGH; 224297590249SBjoern A. Zeeb else if (flags & INP_LOWPORT) 224382cd038dSYoshinobu Inoue optval = IPV6_PORTRANGE_LOW; 224482cd038dSYoshinobu Inoue else 224582cd038dSYoshinobu Inoue optval = 0; 224682cd038dSYoshinobu Inoue break; 224782cd038dSYoshinobu Inoue } 2248f95d4633SHajimu UMEMOTO case IPV6_RECVTCLASS: 2249f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_TCLASS); 2250f95d4633SHajimu UMEMOTO break; 2251f95d4633SHajimu UMEMOTO 2252f95d4633SHajimu UMEMOTO case IPV6_AUTOFLOWLABEL: 2253f95d4633SHajimu UMEMOTO optval = OPTBIT(IN6P_AUTOFLOWLABEL); 2254f95d4633SHajimu UMEMOTO break; 2255f44270e7SPawel Jakub Dawidek 2256dce33a45SErmal Luçi case IPV6_ORIGDSTADDR: 2257dce33a45SErmal Luçi optval = OPTBIT2(INP_ORIGDSTADDR); 2258dce33a45SErmal Luçi break; 2259dce33a45SErmal Luçi 2260f44270e7SPawel Jakub Dawidek case IPV6_BINDANY: 2261f44270e7SPawel Jakub Dawidek optval = OPTBIT(INP_BINDANY); 2262f44270e7SPawel Jakub Dawidek break; 2263c7c0d948SAdrian Chadd 2264c7c0d948SAdrian Chadd case IPV6_FLOWID: 22650ecd976eSBjoern A. Zeeb optval = inp->inp_flowid; 2266c7c0d948SAdrian Chadd break; 2267c7c0d948SAdrian Chadd 2268c7c0d948SAdrian Chadd case IPV6_FLOWTYPE: 22690ecd976eSBjoern A. Zeeb optval = inp->inp_flowtype; 2270c7c0d948SAdrian Chadd break; 227168bb8d62SAdrian Chadd 227268bb8d62SAdrian Chadd case IPV6_RECVFLOWID: 227368bb8d62SAdrian Chadd optval = OPTBIT2(INP_RECVFLOWID); 227468bb8d62SAdrian Chadd break; 2275c7c0d948SAdrian Chadd #ifdef RSS 2276c7c0d948SAdrian Chadd case IPV6_RSSBUCKETID: 2277c7c0d948SAdrian Chadd retval = 22780ecd976eSBjoern A. Zeeb rss_hash2bucket(inp->inp_flowid, 22790ecd976eSBjoern A. Zeeb inp->inp_flowtype, 2280c7c0d948SAdrian Chadd &rss_bucket); 2281c7c0d948SAdrian Chadd if (retval == 0) 2282c7c0d948SAdrian Chadd optval = rss_bucket; 2283c7c0d948SAdrian Chadd else 2284c7c0d948SAdrian Chadd error = EINVAL; 2285c7c0d948SAdrian Chadd break; 228668bb8d62SAdrian Chadd 228768bb8d62SAdrian Chadd case IPV6_RECVRSSBUCKETID: 228868bb8d62SAdrian Chadd optval = OPTBIT2(INP_RECVRSSBUCKETID); 228968bb8d62SAdrian Chadd break; 2290c7c0d948SAdrian Chadd #endif 2291c7c0d948SAdrian Chadd 2292c7c0d948SAdrian Chadd case IPV6_BINDMULTI: 2293c7c0d948SAdrian Chadd optval = OPTBIT2(INP_BINDMULTI); 2294c7c0d948SAdrian Chadd break; 2295868aabb4SRichard Scheffenegger 2296868aabb4SRichard Scheffenegger case IPV6_VLAN_PCP: 2297868aabb4SRichard Scheffenegger if (OPTBIT2(INP_2PCP_SET)) { 2298868aabb4SRichard Scheffenegger optval = (inp->inp_flags2 & 2299868aabb4SRichard Scheffenegger INP_2PCP_MASK) >> 2300868aabb4SRichard Scheffenegger INP_2PCP_SHIFT; 2301868aabb4SRichard Scheffenegger } else { 2302868aabb4SRichard Scheffenegger optval = -1; 230382cd038dSYoshinobu Inoue } 2304868aabb4SRichard Scheffenegger break; 2305868aabb4SRichard Scheffenegger } 2306868aabb4SRichard Scheffenegger 2307f95d4633SHajimu UMEMOTO if (error) 2308f95d4633SHajimu UMEMOTO break; 230982cd038dSYoshinobu Inoue error = sooptcopyout(sopt, &optval, 231082cd038dSYoshinobu Inoue sizeof optval); 231182cd038dSYoshinobu Inoue break; 231282cd038dSYoshinobu Inoue 2313f95d4633SHajimu UMEMOTO case IPV6_PATHMTU: 2314f95d4633SHajimu UMEMOTO { 2315f95d4633SHajimu UMEMOTO u_long pmtu = 0; 2316f95d4633SHajimu UMEMOTO struct ip6_mtuinfo mtuinfo; 23175cbeca44SSean Bruno struct in6_addr addr; 2318f95d4633SHajimu UMEMOTO 2319f95d4633SHajimu UMEMOTO if (!(so->so_state & SS_ISCONNECTED)) 2320f95d4633SHajimu UMEMOTO return (ENOTCONN); 2321f95d4633SHajimu UMEMOTO /* 2322f95d4633SHajimu UMEMOTO * XXX: we dot not consider the case of source 2323f95d4633SHajimu UMEMOTO * routing, or optional information to specify 2324f95d4633SHajimu UMEMOTO * the outgoing interface. 23250ecd976eSBjoern A. Zeeb * Copy faddr out of inp to avoid holding lock 23265cbeca44SSean Bruno * on inp during route lookup. 2327f95d4633SHajimu UMEMOTO */ 23280ecd976eSBjoern A. Zeeb INP_RLOCK(inp); 23290ecd976eSBjoern A. Zeeb bcopy(&inp->in6p_faddr, &addr, sizeof(addr)); 23300ecd976eSBjoern A. Zeeb INP_RUNLOCK(inp); 23310d4df029SAlexander V. Chernikov error = ip6_getpmtu_ctl(so->so_fibnum, 23325cbeca44SSean Bruno &addr, &pmtu); 2333f95d4633SHajimu UMEMOTO if (error) 2334f95d4633SHajimu UMEMOTO break; 2335f95d4633SHajimu UMEMOTO if (pmtu > IPV6_MAXPACKET) 2336f95d4633SHajimu UMEMOTO pmtu = IPV6_MAXPACKET; 2337f95d4633SHajimu UMEMOTO 2338f95d4633SHajimu UMEMOTO bzero(&mtuinfo, sizeof(mtuinfo)); 2339f95d4633SHajimu UMEMOTO mtuinfo.ip6m_mtu = (u_int32_t)pmtu; 2340f95d4633SHajimu UMEMOTO optdata = (void *)&mtuinfo; 2341f95d4633SHajimu UMEMOTO optdatalen = sizeof(mtuinfo); 2342f95d4633SHajimu UMEMOTO error = sooptcopyout(sopt, optdata, 2343f95d4633SHajimu UMEMOTO optdatalen); 2344f95d4633SHajimu UMEMOTO break; 2345f95d4633SHajimu UMEMOTO } 2346f95d4633SHajimu UMEMOTO 2347f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 2348f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 2349f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 2350f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 2351f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 235233841545SHajimu UMEMOTO switch (optname) { 2353f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 235433841545SHajimu UMEMOTO optval = OPTBIT(IN6P_PKTINFO); 235533841545SHajimu UMEMOTO break; 2356f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 235733841545SHajimu UMEMOTO optval = OPTBIT(IN6P_HOPLIMIT); 235833841545SHajimu UMEMOTO break; 2359f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 236033841545SHajimu UMEMOTO optval = OPTBIT(IN6P_HOPOPTS); 236133841545SHajimu UMEMOTO break; 2362f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 236333841545SHajimu UMEMOTO optval = OPTBIT(IN6P_RTHDR); 236433841545SHajimu UMEMOTO break; 2365f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 236633841545SHajimu UMEMOTO optval = OPTBIT(IN6P_DSTOPTS|IN6P_RTHDRDSTOPTS); 236733841545SHajimu UMEMOTO break; 236833841545SHajimu UMEMOTO } 236933841545SHajimu UMEMOTO error = sooptcopyout(sopt, &optval, 237033841545SHajimu UMEMOTO sizeof optval); 237133841545SHajimu UMEMOTO break; 2372f95d4633SHajimu UMEMOTO case IPV6_PKTINFO: 2373f95d4633SHajimu UMEMOTO case IPV6_HOPOPTS: 2374f95d4633SHajimu UMEMOTO case IPV6_RTHDR: 2375f95d4633SHajimu UMEMOTO case IPV6_DSTOPTS: 2376f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 2377f95d4633SHajimu UMEMOTO case IPV6_NEXTHOP: 2378f95d4633SHajimu UMEMOTO case IPV6_TCLASS: 2379f95d4633SHajimu UMEMOTO case IPV6_DONTFRAG: 2380f95d4633SHajimu UMEMOTO case IPV6_USE_MIN_MTU: 2381f95d4633SHajimu UMEMOTO case IPV6_PREFER_TEMPADDR: 23820ecd976eSBjoern A. Zeeb error = ip6_getpcbopt(inp, optname, sopt); 2383f95d4633SHajimu UMEMOTO break; 238433841545SHajimu UMEMOTO 238582cd038dSYoshinobu Inoue case IPV6_MULTICAST_IF: 238682cd038dSYoshinobu Inoue case IPV6_MULTICAST_HOPS: 238782cd038dSYoshinobu Inoue case IPV6_MULTICAST_LOOP: 238833cde130SBruce M Simpson case IPV6_MSFILTER: 23890ecd976eSBjoern A. Zeeb error = ip6_getmoptions(inp, sopt); 239082cd038dSYoshinobu Inoue break; 239182cd038dSYoshinobu Inoue 2392fcf59617SAndrey V. Elsukov #if defined(IPSEC) || defined(IPSEC_SUPPORT) 239382cd038dSYoshinobu Inoue case IPV6_IPSEC_POLICY: 2394fcf59617SAndrey V. Elsukov if (IPSEC_ENABLED(ipv6)) { 23950ecd976eSBjoern A. Zeeb error = IPSEC_PCBCTL(ipv6, inp, sopt); 239682cd038dSYoshinobu Inoue break; 239782cd038dSYoshinobu Inoue } 2398fcf59617SAndrey V. Elsukov /* FALLTHROUGH */ 2399b2630c29SGeorge V. Neville-Neil #endif /* IPSEC */ 240082cd038dSYoshinobu Inoue default: 240182cd038dSYoshinobu Inoue error = ENOPROTOOPT; 240282cd038dSYoshinobu Inoue break; 240382cd038dSYoshinobu Inoue } 240482cd038dSYoshinobu Inoue break; 240582cd038dSYoshinobu Inoue } 240682cd038dSYoshinobu Inoue } 240782cd038dSYoshinobu Inoue return (error); 240882cd038dSYoshinobu Inoue } 240982cd038dSYoshinobu Inoue 241002b9a206SHajimu UMEMOTO int 24111272577eSXin LI ip6_raw_ctloutput(struct socket *so, struct sockopt *sopt) 241202b9a206SHajimu UMEMOTO { 241302b9a206SHajimu UMEMOTO int error = 0, optval, optlen; 241402b9a206SHajimu UMEMOTO const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum); 24150ecd976eSBjoern A. Zeeb struct inpcb *inp = sotoinpcb(so); 241602b9a206SHajimu UMEMOTO int level, op, optname; 241702b9a206SHajimu UMEMOTO 241802b9a206SHajimu UMEMOTO level = sopt->sopt_level; 241902b9a206SHajimu UMEMOTO op = sopt->sopt_dir; 242002b9a206SHajimu UMEMOTO optname = sopt->sopt_name; 242102b9a206SHajimu UMEMOTO optlen = sopt->sopt_valsize; 242202b9a206SHajimu UMEMOTO 242302b9a206SHajimu UMEMOTO if (level != IPPROTO_IPV6) { 242402b9a206SHajimu UMEMOTO return (EINVAL); 242502b9a206SHajimu UMEMOTO } 242602b9a206SHajimu UMEMOTO 242702b9a206SHajimu UMEMOTO switch (optname) { 242802b9a206SHajimu UMEMOTO case IPV6_CHECKSUM: 242902b9a206SHajimu UMEMOTO /* 243002b9a206SHajimu UMEMOTO * For ICMPv6 sockets, no modification allowed for checksum 243102b9a206SHajimu UMEMOTO * offset, permit "no change" values to help existing apps. 243202b9a206SHajimu UMEMOTO * 243318b35df8SHajimu UMEMOTO * RFC3542 says: "An attempt to set IPV6_CHECKSUM 243402b9a206SHajimu UMEMOTO * for an ICMPv6 socket will fail." 243518b35df8SHajimu UMEMOTO * The current behavior does not meet RFC3542. 243602b9a206SHajimu UMEMOTO */ 243702b9a206SHajimu UMEMOTO switch (op) { 243802b9a206SHajimu UMEMOTO case SOPT_SET: 243902b9a206SHajimu UMEMOTO if (optlen != sizeof(int)) { 244002b9a206SHajimu UMEMOTO error = EINVAL; 244102b9a206SHajimu UMEMOTO break; 244202b9a206SHajimu UMEMOTO } 244302b9a206SHajimu UMEMOTO error = sooptcopyin(sopt, &optval, sizeof(optval), 244402b9a206SHajimu UMEMOTO sizeof(optval)); 244502b9a206SHajimu UMEMOTO if (error) 244602b9a206SHajimu UMEMOTO break; 24472f041b74SMichael Tuexen if (optval < -1 || (optval % 2) != 0) { 24482f041b74SMichael Tuexen /* 24492f041b74SMichael Tuexen * The API assumes non-negative even offset 24502f041b74SMichael Tuexen * values or -1 as a special value. 24512f041b74SMichael Tuexen */ 245202b9a206SHajimu UMEMOTO error = EINVAL; 245374ed2e8aSGleb Smirnoff } else if (inp->inp_ip_p == IPPROTO_ICMPV6) { 245402b9a206SHajimu UMEMOTO if (optval != icmp6off) 245502b9a206SHajimu UMEMOTO error = EINVAL; 245602b9a206SHajimu UMEMOTO } else 24570ecd976eSBjoern A. Zeeb inp->in6p_cksum = optval; 245802b9a206SHajimu UMEMOTO break; 245902b9a206SHajimu UMEMOTO 246002b9a206SHajimu UMEMOTO case SOPT_GET: 246174ed2e8aSGleb Smirnoff if (inp->inp_ip_p == IPPROTO_ICMPV6) 246202b9a206SHajimu UMEMOTO optval = icmp6off; 246302b9a206SHajimu UMEMOTO else 24640ecd976eSBjoern A. Zeeb optval = inp->in6p_cksum; 246502b9a206SHajimu UMEMOTO 246602b9a206SHajimu UMEMOTO error = sooptcopyout(sopt, &optval, sizeof(optval)); 246702b9a206SHajimu UMEMOTO break; 246802b9a206SHajimu UMEMOTO 246902b9a206SHajimu UMEMOTO default: 247002b9a206SHajimu UMEMOTO error = EINVAL; 247102b9a206SHajimu UMEMOTO break; 247202b9a206SHajimu UMEMOTO } 247302b9a206SHajimu UMEMOTO break; 247402b9a206SHajimu UMEMOTO 247502b9a206SHajimu UMEMOTO default: 247602b9a206SHajimu UMEMOTO error = ENOPROTOOPT; 247702b9a206SHajimu UMEMOTO break; 247802b9a206SHajimu UMEMOTO } 247902b9a206SHajimu UMEMOTO 248002b9a206SHajimu UMEMOTO return (error); 248102b9a206SHajimu UMEMOTO } 248202b9a206SHajimu UMEMOTO 248382cd038dSYoshinobu Inoue /* 248433841545SHajimu UMEMOTO * Set up IP6 options in pcb for insertion in output packets or 248533841545SHajimu UMEMOTO * specifying behavior of outgoing packets. 248682cd038dSYoshinobu Inoue */ 248782cd038dSYoshinobu Inoue static int 24881272577eSXin LI ip6_pcbopts(struct ip6_pktopts **pktopt, struct mbuf *m, 24891272577eSXin LI struct socket *so, struct sockopt *sopt) 249082cd038dSYoshinobu Inoue { 249133841545SHajimu UMEMOTO struct ip6_pktopts *opt = *pktopt; 249282cd038dSYoshinobu Inoue int error = 0; 2493b40ce416SJulian Elischer struct thread *td = sopt->sopt_td; 24942290dfb4SRyan Stone struct epoch_tracker et; 249582cd038dSYoshinobu Inoue 249682cd038dSYoshinobu Inoue /* turn off any old options. */ 249782cd038dSYoshinobu Inoue if (opt) { 249833841545SHajimu UMEMOTO #ifdef DIAGNOSTIC 249933841545SHajimu UMEMOTO if (opt->ip6po_pktinfo || opt->ip6po_nexthop || 250033841545SHajimu UMEMOTO opt->ip6po_hbh || opt->ip6po_dest1 || opt->ip6po_dest2 || 250133841545SHajimu UMEMOTO opt->ip6po_rhinfo.ip6po_rhi_rthdr) 250233841545SHajimu UMEMOTO printf("ip6_pcbopts: all specified options are cleared.\n"); 250333841545SHajimu UMEMOTO #endif 2504f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, -1); 2505e02582d1SMark Johnston } else { 2506e02582d1SMark Johnston opt = malloc(sizeof(*opt), M_IP6OPT, M_NOWAIT); 2507e02582d1SMark Johnston if (opt == NULL) 2508e02582d1SMark Johnston return (ENOMEM); 2509e02582d1SMark Johnston } 251033841545SHajimu UMEMOTO *pktopt = NULL; 251182cd038dSYoshinobu Inoue 251282cd038dSYoshinobu Inoue if (!m || m->m_len == 0) { 251382cd038dSYoshinobu Inoue /* 251435f6695bSHajimu UMEMOTO * Only turning off any previous options, regardless of 251535f6695bSHajimu UMEMOTO * whether the opt is just created or given. 251682cd038dSYoshinobu Inoue */ 251782cd038dSYoshinobu Inoue free(opt, M_IP6OPT); 251882cd038dSYoshinobu Inoue return (0); 251982cd038dSYoshinobu Inoue } 252082cd038dSYoshinobu Inoue 252182cd038dSYoshinobu Inoue /* set options specified by user. */ 25222290dfb4SRyan Stone NET_EPOCH_ENTER(et); 252379ba3952SBjoern A. Zeeb if ((error = ip6_setpktopts(m, opt, NULL, (td != NULL) ? 252479ba3952SBjoern A. Zeeb td->td_ucred : NULL, so->so_proto->pr_protocol)) != 0) { 2525f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, -1); /* XXX: discard all options */ 252635f6695bSHajimu UMEMOTO free(opt, M_IP6OPT); 25272290dfb4SRyan Stone NET_EPOCH_EXIT(et); 252882cd038dSYoshinobu Inoue return (error); 252982cd038dSYoshinobu Inoue } 25302290dfb4SRyan Stone NET_EPOCH_EXIT(et); 253182cd038dSYoshinobu Inoue *pktopt = opt; 253282cd038dSYoshinobu Inoue return (0); 253382cd038dSYoshinobu Inoue } 253482cd038dSYoshinobu Inoue 253582cd038dSYoshinobu Inoue /* 253633841545SHajimu UMEMOTO * initialize ip6_pktopts. beware that there are non-zero default values in 253733841545SHajimu UMEMOTO * the struct. 253833841545SHajimu UMEMOTO */ 253933841545SHajimu UMEMOTO void 25401272577eSXin LI ip6_initpktopts(struct ip6_pktopts *opt) 254133841545SHajimu UMEMOTO { 254233841545SHajimu UMEMOTO 254333841545SHajimu UMEMOTO bzero(opt, sizeof(*opt)); 254433841545SHajimu UMEMOTO opt->ip6po_hlim = -1; /* -1 means default hop limit */ 2545f95d4633SHajimu UMEMOTO opt->ip6po_tclass = -1; /* -1 means default traffic class */ 2546f95d4633SHajimu UMEMOTO opt->ip6po_minmtu = IP6PO_MINMTU_MCASTONLY; 2547f95d4633SHajimu UMEMOTO opt->ip6po_prefer_tempaddr = IP6PO_TEMPADDR_SYSTEM; 2548f95d4633SHajimu UMEMOTO } 2549f95d4633SHajimu UMEMOTO 2550f95d4633SHajimu UMEMOTO static int 25511272577eSXin LI ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt, 255279ba3952SBjoern A. Zeeb struct ucred *cred, int uproto) 2553f95d4633SHajimu UMEMOTO { 25549f5432d5SKristof Provost struct epoch_tracker et; 2555f95d4633SHajimu UMEMOTO struct ip6_pktopts *opt; 25569f5432d5SKristof Provost int ret; 2557f95d4633SHajimu UMEMOTO 2558f95d4633SHajimu UMEMOTO if (*pktopt == NULL) { 2559f95d4633SHajimu UMEMOTO *pktopt = malloc(sizeof(struct ip6_pktopts), M_IP6OPT, 256056713d16SMatt Macy M_NOWAIT); 256156713d16SMatt Macy if (*pktopt == NULL) 256256713d16SMatt Macy return (ENOBUFS); 2563d5e3406dSHajimu UMEMOTO ip6_initpktopts(*pktopt); 2564f95d4633SHajimu UMEMOTO } 2565f95d4633SHajimu UMEMOTO opt = *pktopt; 2566f95d4633SHajimu UMEMOTO 25679f5432d5SKristof Provost NET_EPOCH_ENTER(et); 25689f5432d5SKristof Provost ret = ip6_setpktopt(optname, buf, len, opt, cred, 1, 0, uproto); 25699f5432d5SKristof Provost NET_EPOCH_EXIT(et); 25709f5432d5SKristof Provost 25719f5432d5SKristof Provost return (ret); 2572f95d4633SHajimu UMEMOTO } 2573f95d4633SHajimu UMEMOTO 257406b479a6SSean Bruno #define GET_PKTOPT_VAR(field, lenexpr) do { \ 257506b479a6SSean Bruno if (pktopt && pktopt->field) { \ 25760ecd976eSBjoern A. Zeeb INP_RUNLOCK(inp); \ 257706b479a6SSean Bruno optdata = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK); \ 257806b479a6SSean Bruno malloc_optdata = true; \ 25790ecd976eSBjoern A. Zeeb INP_RLOCK(inp); \ 2580*53af6903SGleb Smirnoff if (inp->inp_flags & INP_DROPPED) { \ 25810ecd976eSBjoern A. Zeeb INP_RUNLOCK(inp); \ 258206b479a6SSean Bruno free(optdata, M_TEMP); \ 258306b479a6SSean Bruno return (ECONNRESET); \ 258406b479a6SSean Bruno } \ 25850ecd976eSBjoern A. Zeeb pktopt = inp->in6p_outputopts; \ 258606b479a6SSean Bruno if (pktopt && pktopt->field) { \ 258706b479a6SSean Bruno optdatalen = min(lenexpr, sopt->sopt_valsize); \ 2588a8d54fc9SMichael Tuexen bcopy(pktopt->field, optdata, optdatalen); \ 258906b479a6SSean Bruno } else { \ 259006b479a6SSean Bruno free(optdata, M_TEMP); \ 259106b479a6SSean Bruno optdata = NULL; \ 259206b479a6SSean Bruno malloc_optdata = false; \ 259306b479a6SSean Bruno } \ 259406b479a6SSean Bruno } \ 259506b479a6SSean Bruno } while(0) 259606b479a6SSean Bruno 259706b479a6SSean Bruno #define GET_PKTOPT_EXT_HDR(field) GET_PKTOPT_VAR(field, \ 259806b479a6SSean Bruno (((struct ip6_ext *)pktopt->field)->ip6e_len + 1) << 3) 259906b479a6SSean Bruno 260006b479a6SSean Bruno #define GET_PKTOPT_SOCKADDR(field) GET_PKTOPT_VAR(field, \ 260106b479a6SSean Bruno pktopt->field->sa_len) 260206b479a6SSean Bruno 2603f95d4633SHajimu UMEMOTO static int 26040ecd976eSBjoern A. Zeeb ip6_getpcbopt(struct inpcb *inp, int optname, struct sockopt *sopt) 2605f95d4633SHajimu UMEMOTO { 2606f95d4633SHajimu UMEMOTO void *optdata = NULL; 260706b479a6SSean Bruno bool malloc_optdata = false; 2608f95d4633SHajimu UMEMOTO int optdatalen = 0; 2609f95d4633SHajimu UMEMOTO int error = 0; 2610f95d4633SHajimu UMEMOTO struct in6_pktinfo null_pktinfo; 2611f95d4633SHajimu UMEMOTO int deftclass = 0, on; 2612f95d4633SHajimu UMEMOTO int defminmtu = IP6PO_MINMTU_MCASTONLY; 2613f95d4633SHajimu UMEMOTO int defpreftemp = IP6PO_TEMPADDR_SYSTEM; 261406b479a6SSean Bruno struct ip6_pktopts *pktopt; 261506b479a6SSean Bruno 26160ecd976eSBjoern A. Zeeb INP_RLOCK(inp); 26170ecd976eSBjoern A. Zeeb pktopt = inp->in6p_outputopts; 2618f95d4633SHajimu UMEMOTO 2619f95d4633SHajimu UMEMOTO switch (optname) { 2620f95d4633SHajimu UMEMOTO case IPV6_PKTINFO: 2621cb207f93SAndrey V. Elsukov optdata = (void *)&null_pktinfo; 2622cb207f93SAndrey V. Elsukov if (pktopt && pktopt->ip6po_pktinfo) { 2623cb207f93SAndrey V. Elsukov bcopy(pktopt->ip6po_pktinfo, &null_pktinfo, 2624cb207f93SAndrey V. Elsukov sizeof(null_pktinfo)); 2625cb207f93SAndrey V. Elsukov in6_clearscope(&null_pktinfo.ipi6_addr); 2626cb207f93SAndrey V. Elsukov } else { 2627f95d4633SHajimu UMEMOTO /* XXX: we don't have to do this every time... */ 2628f95d4633SHajimu UMEMOTO bzero(&null_pktinfo, sizeof(null_pktinfo)); 2629f95d4633SHajimu UMEMOTO } 2630f95d4633SHajimu UMEMOTO optdatalen = sizeof(struct in6_pktinfo); 2631f95d4633SHajimu UMEMOTO break; 2632f95d4633SHajimu UMEMOTO case IPV6_TCLASS: 2633f95d4633SHajimu UMEMOTO if (pktopt && pktopt->ip6po_tclass >= 0) 263406b479a6SSean Bruno deftclass = pktopt->ip6po_tclass; 2635f95d4633SHajimu UMEMOTO optdata = (void *)&deftclass; 2636f95d4633SHajimu UMEMOTO optdatalen = sizeof(int); 2637f95d4633SHajimu UMEMOTO break; 2638f95d4633SHajimu UMEMOTO case IPV6_HOPOPTS: 263906b479a6SSean Bruno GET_PKTOPT_EXT_HDR(ip6po_hbh); 2640f95d4633SHajimu UMEMOTO break; 2641f95d4633SHajimu UMEMOTO case IPV6_RTHDR: 264206b479a6SSean Bruno GET_PKTOPT_EXT_HDR(ip6po_rthdr); 2643f95d4633SHajimu UMEMOTO break; 2644f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 264506b479a6SSean Bruno GET_PKTOPT_EXT_HDR(ip6po_dest1); 2646f95d4633SHajimu UMEMOTO break; 2647f95d4633SHajimu UMEMOTO case IPV6_DSTOPTS: 264806b479a6SSean Bruno GET_PKTOPT_EXT_HDR(ip6po_dest2); 2649f95d4633SHajimu UMEMOTO break; 2650f95d4633SHajimu UMEMOTO case IPV6_NEXTHOP: 265106b479a6SSean Bruno GET_PKTOPT_SOCKADDR(ip6po_nexthop); 2652f95d4633SHajimu UMEMOTO break; 2653f95d4633SHajimu UMEMOTO case IPV6_USE_MIN_MTU: 2654f95d4633SHajimu UMEMOTO if (pktopt) 265506b479a6SSean Bruno defminmtu = pktopt->ip6po_minmtu; 2656f95d4633SHajimu UMEMOTO optdata = (void *)&defminmtu; 2657f95d4633SHajimu UMEMOTO optdatalen = sizeof(int); 2658f95d4633SHajimu UMEMOTO break; 2659f95d4633SHajimu UMEMOTO case IPV6_DONTFRAG: 2660f95d4633SHajimu UMEMOTO if (pktopt && ((pktopt->ip6po_flags) & IP6PO_DONTFRAG)) 2661f95d4633SHajimu UMEMOTO on = 1; 2662f95d4633SHajimu UMEMOTO else 2663f95d4633SHajimu UMEMOTO on = 0; 2664f95d4633SHajimu UMEMOTO optdata = (void *)&on; 2665f95d4633SHajimu UMEMOTO optdatalen = sizeof(on); 2666f95d4633SHajimu UMEMOTO break; 2667f95d4633SHajimu UMEMOTO case IPV6_PREFER_TEMPADDR: 2668f95d4633SHajimu UMEMOTO if (pktopt) 266906b479a6SSean Bruno defpreftemp = pktopt->ip6po_prefer_tempaddr; 2670f95d4633SHajimu UMEMOTO optdata = (void *)&defpreftemp; 2671f95d4633SHajimu UMEMOTO optdatalen = sizeof(int); 2672f95d4633SHajimu UMEMOTO break; 2673f95d4633SHajimu UMEMOTO default: /* should not happen */ 2674f95d4633SHajimu UMEMOTO #ifdef DIAGNOSTIC 2675f95d4633SHajimu UMEMOTO panic("ip6_getpcbopt: unexpected option\n"); 2676f95d4633SHajimu UMEMOTO #endif 26770ecd976eSBjoern A. Zeeb INP_RUNLOCK(inp); 2678f95d4633SHajimu UMEMOTO return (ENOPROTOOPT); 2679f95d4633SHajimu UMEMOTO } 26800ecd976eSBjoern A. Zeeb INP_RUNLOCK(inp); 2681f95d4633SHajimu UMEMOTO 2682f95d4633SHajimu UMEMOTO error = sooptcopyout(sopt, optdata, optdatalen); 268306b479a6SSean Bruno if (malloc_optdata) 268406b479a6SSean Bruno free(optdata, M_TEMP); 2685f95d4633SHajimu UMEMOTO 2686f95d4633SHajimu UMEMOTO return (error); 268733841545SHajimu UMEMOTO } 268833841545SHajimu UMEMOTO 268933841545SHajimu UMEMOTO void 26901272577eSXin LI ip6_clearpktopts(struct ip6_pktopts *pktopt, int optname) 269133841545SHajimu UMEMOTO { 2692289b28bdSHajimu UMEMOTO if (pktopt == NULL) 2693289b28bdSHajimu UMEMOTO return; 2694289b28bdSHajimu UMEMOTO 2695f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_PKTINFO) { 2696885adbfaSHajimu UMEMOTO if (pktopt->ip6po_pktinfo) 269733841545SHajimu UMEMOTO free(pktopt->ip6po_pktinfo, M_IP6OPT); 269833841545SHajimu UMEMOTO pktopt->ip6po_pktinfo = NULL; 269933841545SHajimu UMEMOTO } 2700f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_HOPLIMIT) 270133841545SHajimu UMEMOTO pktopt->ip6po_hlim = -1; 2702f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_TCLASS) 2703f95d4633SHajimu UMEMOTO pktopt->ip6po_tclass = -1; 2704f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_NEXTHOP) { 2705983066f0SAlexander V. Chernikov if (pktopt->ip6po_nextroute.ro_nh) { 2706983066f0SAlexander V. Chernikov NH_FREE(pktopt->ip6po_nextroute.ro_nh); 2707983066f0SAlexander V. Chernikov pktopt->ip6po_nextroute.ro_nh = NULL; 2708f95d4633SHajimu UMEMOTO } 2709885adbfaSHajimu UMEMOTO if (pktopt->ip6po_nexthop) 271033841545SHajimu UMEMOTO free(pktopt->ip6po_nexthop, M_IP6OPT); 271133841545SHajimu UMEMOTO pktopt->ip6po_nexthop = NULL; 271233841545SHajimu UMEMOTO } 2713f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_HOPOPTS) { 2714885adbfaSHajimu UMEMOTO if (pktopt->ip6po_hbh) 271533841545SHajimu UMEMOTO free(pktopt->ip6po_hbh, M_IP6OPT); 271633841545SHajimu UMEMOTO pktopt->ip6po_hbh = NULL; 271733841545SHajimu UMEMOTO } 2718f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_RTHDRDSTOPTS) { 2719885adbfaSHajimu UMEMOTO if (pktopt->ip6po_dest1) 272033841545SHajimu UMEMOTO free(pktopt->ip6po_dest1, M_IP6OPT); 272133841545SHajimu UMEMOTO pktopt->ip6po_dest1 = NULL; 272233841545SHajimu UMEMOTO } 2723f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_RTHDR) { 2724885adbfaSHajimu UMEMOTO if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr) 272533841545SHajimu UMEMOTO free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT); 272633841545SHajimu UMEMOTO pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL; 2727983066f0SAlexander V. Chernikov if (pktopt->ip6po_route.ro_nh) { 2728983066f0SAlexander V. Chernikov NH_FREE(pktopt->ip6po_route.ro_nh); 2729983066f0SAlexander V. Chernikov pktopt->ip6po_route.ro_nh = NULL; 273033841545SHajimu UMEMOTO } 273133841545SHajimu UMEMOTO } 2732f95d4633SHajimu UMEMOTO if (optname == -1 || optname == IPV6_DSTOPTS) { 2733885adbfaSHajimu UMEMOTO if (pktopt->ip6po_dest2) 273433841545SHajimu UMEMOTO free(pktopt->ip6po_dest2, M_IP6OPT); 273533841545SHajimu UMEMOTO pktopt->ip6po_dest2 = NULL; 273633841545SHajimu UMEMOTO } 273733841545SHajimu UMEMOTO } 273833841545SHajimu UMEMOTO 273933841545SHajimu UMEMOTO #define PKTOPT_EXTHDRCPY(type) \ 274033841545SHajimu UMEMOTO do {\ 274133841545SHajimu UMEMOTO if (src->type) {\ 27427efe5d92SHajimu UMEMOTO int hlen = (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\ 274333841545SHajimu UMEMOTO dst->type = malloc(hlen, M_IP6OPT, canwait);\ 27448b07e00eSJonathan T. Looney if (dst->type == NULL)\ 274533841545SHajimu UMEMOTO goto bad;\ 274633841545SHajimu UMEMOTO bcopy(src->type, dst->type, hlen);\ 274733841545SHajimu UMEMOTO }\ 27487efe5d92SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 274933841545SHajimu UMEMOTO 2750885adbfaSHajimu UMEMOTO static int 27511272577eSXin LI copypktopts(struct ip6_pktopts *dst, struct ip6_pktopts *src, int canwait) 275233841545SHajimu UMEMOTO { 2753885adbfaSHajimu UMEMOTO if (dst == NULL || src == NULL) { 275433841545SHajimu UMEMOTO printf("ip6_clearpktopts: invalid argument\n"); 2755885adbfaSHajimu UMEMOTO return (EINVAL); 275633841545SHajimu UMEMOTO } 275733841545SHajimu UMEMOTO 275833841545SHajimu UMEMOTO dst->ip6po_hlim = src->ip6po_hlim; 2759f95d4633SHajimu UMEMOTO dst->ip6po_tclass = src->ip6po_tclass; 2760f95d4633SHajimu UMEMOTO dst->ip6po_flags = src->ip6po_flags; 27616090ab8bSHiroki Sato dst->ip6po_minmtu = src->ip6po_minmtu; 27626090ab8bSHiroki Sato dst->ip6po_prefer_tempaddr = src->ip6po_prefer_tempaddr; 276333841545SHajimu UMEMOTO if (src->ip6po_pktinfo) { 276433841545SHajimu UMEMOTO dst->ip6po_pktinfo = malloc(sizeof(*dst->ip6po_pktinfo), 276533841545SHajimu UMEMOTO M_IP6OPT, canwait); 27662cb64cb2SGeorge V. Neville-Neil if (dst->ip6po_pktinfo == NULL) 276733841545SHajimu UMEMOTO goto bad; 276833841545SHajimu UMEMOTO *dst->ip6po_pktinfo = *src->ip6po_pktinfo; 276933841545SHajimu UMEMOTO } 277033841545SHajimu UMEMOTO if (src->ip6po_nexthop) { 277133841545SHajimu UMEMOTO dst->ip6po_nexthop = malloc(src->ip6po_nexthop->sa_len, 277233841545SHajimu UMEMOTO M_IP6OPT, canwait); 2773403cbcf5SGeorge V. Neville-Neil if (dst->ip6po_nexthop == NULL) 277433841545SHajimu UMEMOTO goto bad; 277533841545SHajimu UMEMOTO bcopy(src->ip6po_nexthop, dst->ip6po_nexthop, 277633841545SHajimu UMEMOTO src->ip6po_nexthop->sa_len); 277733841545SHajimu UMEMOTO } 277833841545SHajimu UMEMOTO PKTOPT_EXTHDRCPY(ip6po_hbh); 277933841545SHajimu UMEMOTO PKTOPT_EXTHDRCPY(ip6po_dest1); 278033841545SHajimu UMEMOTO PKTOPT_EXTHDRCPY(ip6po_dest2); 278133841545SHajimu UMEMOTO PKTOPT_EXTHDRCPY(ip6po_rthdr); /* not copy the cached route */ 2782885adbfaSHajimu UMEMOTO return (0); 278333841545SHajimu UMEMOTO 278433841545SHajimu UMEMOTO bad: 2785016fb9d9SMike Makonnen ip6_clearpktopts(dst, -1); 2786885adbfaSHajimu UMEMOTO return (ENOBUFS); 2787885adbfaSHajimu UMEMOTO } 2788885adbfaSHajimu UMEMOTO #undef PKTOPT_EXTHDRCPY 2789885adbfaSHajimu UMEMOTO 2790885adbfaSHajimu UMEMOTO struct ip6_pktopts * 27911272577eSXin LI ip6_copypktopts(struct ip6_pktopts *src, int canwait) 2792885adbfaSHajimu UMEMOTO { 2793885adbfaSHajimu UMEMOTO int error; 2794885adbfaSHajimu UMEMOTO struct ip6_pktopts *dst; 2795885adbfaSHajimu UMEMOTO 2796885adbfaSHajimu UMEMOTO dst = malloc(sizeof(*dst), M_IP6OPT, canwait); 27972cb64cb2SGeorge V. Neville-Neil if (dst == NULL) 2798885adbfaSHajimu UMEMOTO return (NULL); 2799885adbfaSHajimu UMEMOTO ip6_initpktopts(dst); 2800885adbfaSHajimu UMEMOTO 2801885adbfaSHajimu UMEMOTO if ((error = copypktopts(dst, src, canwait)) != 0) { 280235f6695bSHajimu UMEMOTO free(dst, M_IP6OPT); 280333841545SHajimu UMEMOTO return (NULL); 280433841545SHajimu UMEMOTO } 2805885adbfaSHajimu UMEMOTO 2806885adbfaSHajimu UMEMOTO return (dst); 2807885adbfaSHajimu UMEMOTO } 280833841545SHajimu UMEMOTO 280933841545SHajimu UMEMOTO void 28101272577eSXin LI ip6_freepcbopts(struct ip6_pktopts *pktopt) 281133841545SHajimu UMEMOTO { 281233841545SHajimu UMEMOTO if (pktopt == NULL) 281333841545SHajimu UMEMOTO return; 281433841545SHajimu UMEMOTO 2815f95d4633SHajimu UMEMOTO ip6_clearpktopts(pktopt, -1); 281633841545SHajimu UMEMOTO 281733841545SHajimu UMEMOTO free(pktopt, M_IP6OPT); 281833841545SHajimu UMEMOTO } 281933841545SHajimu UMEMOTO 282033841545SHajimu UMEMOTO /* 282182cd038dSYoshinobu Inoue * Set IPv6 outgoing packet options based on advanced API. 282282cd038dSYoshinobu Inoue */ 282382cd038dSYoshinobu Inoue int 28241272577eSXin LI ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt, 282579ba3952SBjoern A. Zeeb struct ip6_pktopts *stickyopt, struct ucred *cred, int uproto) 282682cd038dSYoshinobu Inoue { 2827155d72c4SPedro F. Giffuni struct cmsghdr *cm = NULL; 282882cd038dSYoshinobu Inoue 28298507acb1SHajimu UMEMOTO if (control == NULL || opt == NULL) 283082cd038dSYoshinobu Inoue return (EINVAL); 283182cd038dSYoshinobu Inoue 28322290dfb4SRyan Stone /* 2833d74b7baeSGleb Smirnoff * ip6_setpktopt can call ifnet_byindex(), so it's imperative that we 2834d74b7baeSGleb Smirnoff * are in the network epoch here. 28352290dfb4SRyan Stone */ 28362290dfb4SRyan Stone NET_EPOCH_ASSERT(); 28372290dfb4SRyan Stone 2838885adbfaSHajimu UMEMOTO ip6_initpktopts(opt); 2839f95d4633SHajimu UMEMOTO if (stickyopt) { 2840885adbfaSHajimu UMEMOTO int error; 2841885adbfaSHajimu UMEMOTO 2842f95d4633SHajimu UMEMOTO /* 2843f95d4633SHajimu UMEMOTO * If stickyopt is provided, make a local copy of the options 2844f95d4633SHajimu UMEMOTO * for this particular packet, then override them by ancillary 2845f95d4633SHajimu UMEMOTO * objects. 2846885adbfaSHajimu UMEMOTO * XXX: copypktopts() does not copy the cached route to a next 2847885adbfaSHajimu UMEMOTO * hop (if any). This is not very good in terms of efficiency, 2848885adbfaSHajimu UMEMOTO * but we can allow this since this option should be rarely 2849885adbfaSHajimu UMEMOTO * used. 2850f95d4633SHajimu UMEMOTO */ 2851885adbfaSHajimu UMEMOTO if ((error = copypktopts(opt, stickyopt, M_NOWAIT)) != 0) 2852885adbfaSHajimu UMEMOTO return (error); 2853f95d4633SHajimu UMEMOTO } 285482cd038dSYoshinobu Inoue 285582cd038dSYoshinobu Inoue /* 285682cd038dSYoshinobu Inoue * XXX: Currently, we assume all the optional information is stored 285782cd038dSYoshinobu Inoue * in a single mbuf. 285882cd038dSYoshinobu Inoue */ 285982cd038dSYoshinobu Inoue if (control->m_next) 286082cd038dSYoshinobu Inoue return (EINVAL); 286182cd038dSYoshinobu Inoue 28626f4da201SBjoern A. Zeeb for (; control->m_len > 0; control->m_data += CMSG_ALIGN(cm->cmsg_len), 286333841545SHajimu UMEMOTO control->m_len -= CMSG_ALIGN(cm->cmsg_len)) { 2864f95d4633SHajimu UMEMOTO int error; 2865f95d4633SHajimu UMEMOTO 2866f95d4633SHajimu UMEMOTO if (control->m_len < CMSG_LEN(0)) 2867f95d4633SHajimu UMEMOTO return (EINVAL); 2868f95d4633SHajimu UMEMOTO 286982cd038dSYoshinobu Inoue cm = mtod(control, struct cmsghdr *); 287082cd038dSYoshinobu Inoue if (cm->cmsg_len == 0 || cm->cmsg_len > control->m_len) 287182cd038dSYoshinobu Inoue return (EINVAL); 287282cd038dSYoshinobu Inoue if (cm->cmsg_level != IPPROTO_IPV6) 287382cd038dSYoshinobu Inoue continue; 287482cd038dSYoshinobu Inoue 2875d5e3406dSHajimu UMEMOTO error = ip6_setpktopt(cm->cmsg_type, CMSG_DATA(cm), 287679ba3952SBjoern A. Zeeb cm->cmsg_len - CMSG_LEN(0), opt, cred, 0, 1, uproto); 2877f95d4633SHajimu UMEMOTO if (error) 2878f95d4633SHajimu UMEMOTO return (error); 2879f95d4633SHajimu UMEMOTO } 288082cd038dSYoshinobu Inoue 2881f95d4633SHajimu UMEMOTO return (0); 2882f95d4633SHajimu UMEMOTO } 2883f95d4633SHajimu UMEMOTO 2884f95d4633SHajimu UMEMOTO /* 2885f95d4633SHajimu UMEMOTO * Set a particular packet option, as a sticky option or an ancillary data 2886f95d4633SHajimu UMEMOTO * item. "len" can be 0 only when it's a sticky option. 2887f95d4633SHajimu UMEMOTO * We have 4 cases of combination of "sticky" and "cmsg": 2888f95d4633SHajimu UMEMOTO * "sticky=0, cmsg=0": impossible 288918b35df8SHajimu UMEMOTO * "sticky=0, cmsg=1": RFC2292 or RFC3542 ancillary data 289018b35df8SHajimu UMEMOTO * "sticky=1, cmsg=0": RFC3542 socket option 2891f95d4633SHajimu UMEMOTO * "sticky=1, cmsg=1": RFC2292 socket option 2892f95d4633SHajimu UMEMOTO */ 2893f95d4633SHajimu UMEMOTO static int 28941272577eSXin LI ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt, 289579ba3952SBjoern A. Zeeb struct ucred *cred, int sticky, int cmsg, int uproto) 2896f95d4633SHajimu UMEMOTO { 2897f95d4633SHajimu UMEMOTO int minmtupolicy, preftemp; 289879ba3952SBjoern A. Zeeb int error; 2899f95d4633SHajimu UMEMOTO 29009f5432d5SKristof Provost NET_EPOCH_ASSERT(); 29019f5432d5SKristof Provost 2902f95d4633SHajimu UMEMOTO if (!sticky && !cmsg) { 2903f95d4633SHajimu UMEMOTO #ifdef DIAGNOSTIC 2904d5e3406dSHajimu UMEMOTO printf("ip6_setpktopt: impossible case\n"); 2905f95d4633SHajimu UMEMOTO #endif 2906f95d4633SHajimu UMEMOTO return (EINVAL); 2907f95d4633SHajimu UMEMOTO } 2908f95d4633SHajimu UMEMOTO 2909f95d4633SHajimu UMEMOTO /* 2910f95d4633SHajimu UMEMOTO * IPV6_2292xxx is for backward compatibility to RFC2292, and should 291118b35df8SHajimu UMEMOTO * not be specified in the context of RFC3542. Conversely, 291218b35df8SHajimu UMEMOTO * RFC3542 types should not be specified in the context of RFC2292. 2913f95d4633SHajimu UMEMOTO */ 2914f95d4633SHajimu UMEMOTO if (!cmsg) { 2915f95d4633SHajimu UMEMOTO switch (optname) { 2916f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 2917f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 2918f95d4633SHajimu UMEMOTO case IPV6_2292NEXTHOP: 2919f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 2920f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 2921f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 2922f95d4633SHajimu UMEMOTO case IPV6_2292PKTOPTIONS: 2923f95d4633SHajimu UMEMOTO return (ENOPROTOOPT); 2924f95d4633SHajimu UMEMOTO } 2925f95d4633SHajimu UMEMOTO } 2926f95d4633SHajimu UMEMOTO if (sticky && cmsg) { 2927f95d4633SHajimu UMEMOTO switch (optname) { 2928f95d4633SHajimu UMEMOTO case IPV6_PKTINFO: 2929f95d4633SHajimu UMEMOTO case IPV6_HOPLIMIT: 2930f95d4633SHajimu UMEMOTO case IPV6_NEXTHOP: 2931f95d4633SHajimu UMEMOTO case IPV6_HOPOPTS: 2932f95d4633SHajimu UMEMOTO case IPV6_DSTOPTS: 2933f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 2934f95d4633SHajimu UMEMOTO case IPV6_RTHDR: 2935f95d4633SHajimu UMEMOTO case IPV6_USE_MIN_MTU: 2936f95d4633SHajimu UMEMOTO case IPV6_DONTFRAG: 2937f95d4633SHajimu UMEMOTO case IPV6_TCLASS: 293818b35df8SHajimu UMEMOTO case IPV6_PREFER_TEMPADDR: /* XXX: not an RFC3542 option */ 2939f95d4633SHajimu UMEMOTO return (ENOPROTOOPT); 2940f95d4633SHajimu UMEMOTO } 2941f95d4633SHajimu UMEMOTO } 2942f95d4633SHajimu UMEMOTO 2943f95d4633SHajimu UMEMOTO switch (optname) { 2944f95d4633SHajimu UMEMOTO case IPV6_2292PKTINFO: 2945f95d4633SHajimu UMEMOTO case IPV6_PKTINFO: 2946f95d4633SHajimu UMEMOTO { 2947f95d4633SHajimu UMEMOTO struct ifnet *ifp = NULL; 2948f95d4633SHajimu UMEMOTO struct in6_pktinfo *pktinfo; 2949f95d4633SHajimu UMEMOTO 2950f95d4633SHajimu UMEMOTO if (len != sizeof(struct in6_pktinfo)) 2951f95d4633SHajimu UMEMOTO return (EINVAL); 2952f95d4633SHajimu UMEMOTO 2953f95d4633SHajimu UMEMOTO pktinfo = (struct in6_pktinfo *)buf; 2954f95d4633SHajimu UMEMOTO 2955f95d4633SHajimu UMEMOTO /* 2956f95d4633SHajimu UMEMOTO * An application can clear any sticky IPV6_PKTINFO option by 2957f95d4633SHajimu UMEMOTO * doing a "regular" setsockopt with ipi6_addr being 2958f95d4633SHajimu UMEMOTO * in6addr_any and ipi6_ifindex being zero. 2959f95d4633SHajimu UMEMOTO * [RFC 3542, Section 6] 2960f95d4633SHajimu UMEMOTO */ 2961f95d4633SHajimu UMEMOTO if (optname == IPV6_PKTINFO && opt->ip6po_pktinfo && 2962f95d4633SHajimu UMEMOTO pktinfo->ipi6_ifindex == 0 && 2963f95d4633SHajimu UMEMOTO IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) { 2964f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, optname); 2965f95d4633SHajimu UMEMOTO break; 2966f95d4633SHajimu UMEMOTO } 2967f95d4633SHajimu UMEMOTO 2968f95d4633SHajimu UMEMOTO if (uproto == IPPROTO_TCP && optname == IPV6_PKTINFO && 2969f95d4633SHajimu UMEMOTO sticky && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) { 2970f95d4633SHajimu UMEMOTO return (EINVAL); 2971f95d4633SHajimu UMEMOTO } 29729196891fSAndrey V. Elsukov if (IN6_IS_ADDR_MULTICAST(&pktinfo->ipi6_addr)) 29739196891fSAndrey V. Elsukov return (EINVAL); 2974f95d4633SHajimu UMEMOTO /* validate the interface index if specified. */ 2975f95d4633SHajimu UMEMOTO if (pktinfo->ipi6_ifindex) { 2976f95d4633SHajimu UMEMOTO ifp = ifnet_byindex(pktinfo->ipi6_ifindex); 2977f95d4633SHajimu UMEMOTO if (ifp == NULL) 297882cd038dSYoshinobu Inoue return (ENXIO); 297982cd038dSYoshinobu Inoue } 2980be393491SDimitry Andric if (ifp != NULL && (ifp->if_afdata[AF_INET6] == NULL || 2981be393491SDimitry Andric (ND_IFINFO(ifp)->flags & ND6_IFF_IFDISABLED) != 0)) 29829196891fSAndrey V. Elsukov return (ENETDOWN); 298382cd038dSYoshinobu Inoue 29849196891fSAndrey V. Elsukov if (ifp != NULL && 29859196891fSAndrey V. Elsukov !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)) { 29869196891fSAndrey V. Elsukov struct in6_ifaddr *ia; 29879196891fSAndrey V. Elsukov 2988cb207f93SAndrey V. Elsukov in6_setscope(&pktinfo->ipi6_addr, ifp, NULL); 29899196891fSAndrey V. Elsukov ia = in6ifa_ifpwithaddr(ifp, &pktinfo->ipi6_addr); 29909196891fSAndrey V. Elsukov if (ia == NULL) 29919196891fSAndrey V. Elsukov return (EADDRNOTAVAIL); 29929196891fSAndrey V. Elsukov ifa_free(&ia->ia_ifa); 29939196891fSAndrey V. Elsukov } 299433841545SHajimu UMEMOTO /* 2995f95d4633SHajimu UMEMOTO * We store the address anyway, and let in6_selectsrc() 2996f95d4633SHajimu UMEMOTO * validate the specified address. This is because ipi6_addr 2997f95d4633SHajimu UMEMOTO * may not have enough information about its scope zone, and 2998f95d4633SHajimu UMEMOTO * we may need additional information (such as outgoing 2999f95d4633SHajimu UMEMOTO * interface or the scope zone of a destination address) to 3000f95d4633SHajimu UMEMOTO * disambiguate the scope. 3001f95d4633SHajimu UMEMOTO * XXX: the delay of the validation may confuse the 3002f95d4633SHajimu UMEMOTO * application when it is used as a sticky option. 300333841545SHajimu UMEMOTO */ 3004f95d4633SHajimu UMEMOTO if (opt->ip6po_pktinfo == NULL) { 3005f95d4633SHajimu UMEMOTO opt->ip6po_pktinfo = malloc(sizeof(*pktinfo), 3006885adbfaSHajimu UMEMOTO M_IP6OPT, M_NOWAIT); 3007885adbfaSHajimu UMEMOTO if (opt->ip6po_pktinfo == NULL) 3008885adbfaSHajimu UMEMOTO return (ENOBUFS); 300982cd038dSYoshinobu Inoue } 3010f95d4633SHajimu UMEMOTO bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo)); 301182cd038dSYoshinobu Inoue break; 3012f95d4633SHajimu UMEMOTO } 301382cd038dSYoshinobu Inoue 3014f95d4633SHajimu UMEMOTO case IPV6_2292HOPLIMIT: 301582cd038dSYoshinobu Inoue case IPV6_HOPLIMIT: 3016f95d4633SHajimu UMEMOTO { 3017f95d4633SHajimu UMEMOTO int *hlimp; 3018f95d4633SHajimu UMEMOTO 3019f95d4633SHajimu UMEMOTO /* 3020f95d4633SHajimu UMEMOTO * RFC 3542 deprecated the usage of sticky IPV6_HOPLIMIT 3021f95d4633SHajimu UMEMOTO * to simplify the ordering among hoplimit options. 3022f95d4633SHajimu UMEMOTO */ 3023f95d4633SHajimu UMEMOTO if (optname == IPV6_HOPLIMIT && sticky) 3024f95d4633SHajimu UMEMOTO return (ENOPROTOOPT); 3025f95d4633SHajimu UMEMOTO 3026f95d4633SHajimu UMEMOTO if (len != sizeof(int)) 3027f95d4633SHajimu UMEMOTO return (EINVAL); 3028f95d4633SHajimu UMEMOTO hlimp = (int *)buf; 3029f95d4633SHajimu UMEMOTO if (*hlimp < -1 || *hlimp > 255) 303082cd038dSYoshinobu Inoue return (EINVAL); 303182cd038dSYoshinobu Inoue 3032f95d4633SHajimu UMEMOTO opt->ip6po_hlim = *hlimp; 303382cd038dSYoshinobu Inoue break; 3034f95d4633SHajimu UMEMOTO } 303582cd038dSYoshinobu Inoue 3036f95d4633SHajimu UMEMOTO case IPV6_TCLASS: 3037f95d4633SHajimu UMEMOTO { 3038f95d4633SHajimu UMEMOTO int tclass; 3039f95d4633SHajimu UMEMOTO 3040f95d4633SHajimu UMEMOTO if (len != sizeof(int)) 3041f95d4633SHajimu UMEMOTO return (EINVAL); 3042f95d4633SHajimu UMEMOTO tclass = *(int *)buf; 3043f95d4633SHajimu UMEMOTO if (tclass < -1 || tclass > 255) 3044f95d4633SHajimu UMEMOTO return (EINVAL); 3045f95d4633SHajimu UMEMOTO 3046f95d4633SHajimu UMEMOTO opt->ip6po_tclass = tclass; 3047f95d4633SHajimu UMEMOTO break; 3048f95d4633SHajimu UMEMOTO } 3049f95d4633SHajimu UMEMOTO 3050f95d4633SHajimu UMEMOTO case IPV6_2292NEXTHOP: 305182cd038dSYoshinobu Inoue case IPV6_NEXTHOP: 305279ba3952SBjoern A. Zeeb if (cred != NULL) { 3053cc426dd3SMateusz Guzik error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS); 305479ba3952SBjoern A. Zeeb if (error) 305579ba3952SBjoern A. Zeeb return (error); 305679ba3952SBjoern A. Zeeb } 305733841545SHajimu UMEMOTO 3058f95d4633SHajimu UMEMOTO if (len == 0) { /* just remove the option */ 3059f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_NEXTHOP); 3060f95d4633SHajimu UMEMOTO break; 3061f95d4633SHajimu UMEMOTO } 3062f95d4633SHajimu UMEMOTO 306333841545SHajimu UMEMOTO /* check if cmsg_len is large enough for sa_len */ 3064f95d4633SHajimu UMEMOTO if (len < sizeof(struct sockaddr) || len < *buf) 306582cd038dSYoshinobu Inoue return (EINVAL); 306682cd038dSYoshinobu Inoue 3067f95d4633SHajimu UMEMOTO switch (((struct sockaddr *)buf)->sa_family) { 3068f95d4633SHajimu UMEMOTO case AF_INET6: 3069f95d4633SHajimu UMEMOTO { 3070f95d4633SHajimu UMEMOTO struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)buf; 3071f95d4633SHajimu UMEMOTO int error; 3072f95d4633SHajimu UMEMOTO 3073f95d4633SHajimu UMEMOTO if (sa6->sin6_len != sizeof(struct sockaddr_in6)) 3074f95d4633SHajimu UMEMOTO return (EINVAL); 3075f95d4633SHajimu UMEMOTO 3076f95d4633SHajimu UMEMOTO if (IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr) || 3077f95d4633SHajimu UMEMOTO IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr)) { 3078f95d4633SHajimu UMEMOTO return (EINVAL); 3079f95d4633SHajimu UMEMOTO } 3080603724d3SBjoern A. Zeeb if ((error = sa6_embedscope(sa6, V_ip6_use_defzone)) 3081f95d4633SHajimu UMEMOTO != 0) { 3082f95d4633SHajimu UMEMOTO return (error); 3083f95d4633SHajimu UMEMOTO } 3084f95d4633SHajimu UMEMOTO break; 3085f95d4633SHajimu UMEMOTO } 3086f95d4633SHajimu UMEMOTO case AF_LINK: /* should eventually be supported */ 3087f95d4633SHajimu UMEMOTO default: 3088f95d4633SHajimu UMEMOTO return (EAFNOSUPPORT); 3089f95d4633SHajimu UMEMOTO } 3090f95d4633SHajimu UMEMOTO 3091f95d4633SHajimu UMEMOTO /* turn off the previous option, then set the new option. */ 3092f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_NEXTHOP); 3093743eee66SSUZUKI Shinsuke opt->ip6po_nexthop = malloc(*buf, M_IP6OPT, M_NOWAIT); 3094743eee66SSUZUKI Shinsuke if (opt->ip6po_nexthop == NULL) 3095743eee66SSUZUKI Shinsuke return (ENOBUFS); 3096f95d4633SHajimu UMEMOTO bcopy(buf, opt->ip6po_nexthop, *buf); 309782cd038dSYoshinobu Inoue break; 309882cd038dSYoshinobu Inoue 3099f95d4633SHajimu UMEMOTO case IPV6_2292HOPOPTS: 310082cd038dSYoshinobu Inoue case IPV6_HOPOPTS: 310133841545SHajimu UMEMOTO { 310233841545SHajimu UMEMOTO struct ip6_hbh *hbh; 310333841545SHajimu UMEMOTO int hbhlen; 310433841545SHajimu UMEMOTO 3105f95d4633SHajimu UMEMOTO /* 3106f95d4633SHajimu UMEMOTO * XXX: We don't allow a non-privileged user to set ANY HbH 3107f95d4633SHajimu UMEMOTO * options, since per-option restriction has too much 3108f95d4633SHajimu UMEMOTO * overhead. 3109f95d4633SHajimu UMEMOTO */ 311079ba3952SBjoern A. Zeeb if (cred != NULL) { 3111cc426dd3SMateusz Guzik error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS); 311279ba3952SBjoern A. Zeeb if (error) 311379ba3952SBjoern A. Zeeb return (error); 311479ba3952SBjoern A. Zeeb } 3115f95d4633SHajimu UMEMOTO 3116f95d4633SHajimu UMEMOTO if (len == 0) { 3117f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_HOPOPTS); 3118f95d4633SHajimu UMEMOTO break; /* just remove the option */ 3119f95d4633SHajimu UMEMOTO } 3120f95d4633SHajimu UMEMOTO 3121f95d4633SHajimu UMEMOTO /* message length validation */ 3122f95d4633SHajimu UMEMOTO if (len < sizeof(struct ip6_hbh)) 312382cd038dSYoshinobu Inoue return (EINVAL); 3124f95d4633SHajimu UMEMOTO hbh = (struct ip6_hbh *)buf; 312533841545SHajimu UMEMOTO hbhlen = (hbh->ip6h_len + 1) << 3; 3126f95d4633SHajimu UMEMOTO if (len != hbhlen) 312782cd038dSYoshinobu Inoue return (EINVAL); 312833841545SHajimu UMEMOTO 3129f95d4633SHajimu UMEMOTO /* turn off the previous option, then set the new option. */ 3130f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_HOPOPTS); 3131743eee66SSUZUKI Shinsuke opt->ip6po_hbh = malloc(hbhlen, M_IP6OPT, M_NOWAIT); 3132743eee66SSUZUKI Shinsuke if (opt->ip6po_hbh == NULL) 3133743eee66SSUZUKI Shinsuke return (ENOBUFS); 313433841545SHajimu UMEMOTO bcopy(hbh, opt->ip6po_hbh, hbhlen); 3135f95d4633SHajimu UMEMOTO 313682cd038dSYoshinobu Inoue break; 313733841545SHajimu UMEMOTO } 313882cd038dSYoshinobu Inoue 3139f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 314082cd038dSYoshinobu Inoue case IPV6_DSTOPTS: 3141f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 314233841545SHajimu UMEMOTO { 3143f95d4633SHajimu UMEMOTO struct ip6_dest *dest, **newdest = NULL; 314433841545SHajimu UMEMOTO int destlen; 314533841545SHajimu UMEMOTO 314679ba3952SBjoern A. Zeeb if (cred != NULL) { /* XXX: see the comment for IPV6_HOPOPTS */ 3147cc426dd3SMateusz Guzik error = priv_check_cred(cred, PRIV_NETINET_SETHDROPTS); 314879ba3952SBjoern A. Zeeb if (error) 314979ba3952SBjoern A. Zeeb return (error); 315079ba3952SBjoern A. Zeeb } 3151f95d4633SHajimu UMEMOTO 3152f95d4633SHajimu UMEMOTO if (len == 0) { 3153f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, optname); 3154f95d4633SHajimu UMEMOTO break; /* just remove the option */ 3155f95d4633SHajimu UMEMOTO } 3156f95d4633SHajimu UMEMOTO 3157f95d4633SHajimu UMEMOTO /* message length validation */ 3158f95d4633SHajimu UMEMOTO if (len < sizeof(struct ip6_dest)) 315982cd038dSYoshinobu Inoue return (EINVAL); 3160f95d4633SHajimu UMEMOTO dest = (struct ip6_dest *)buf; 316133841545SHajimu UMEMOTO destlen = (dest->ip6d_len + 1) << 3; 3162f95d4633SHajimu UMEMOTO if (len != destlen) 316333841545SHajimu UMEMOTO return (EINVAL); 316482cd038dSYoshinobu Inoue 316582cd038dSYoshinobu Inoue /* 3166f95d4633SHajimu UMEMOTO * Determine the position that the destination options header 3167f95d4633SHajimu UMEMOTO * should be inserted; before or after the routing header. 3168f95d4633SHajimu UMEMOTO */ 3169f95d4633SHajimu UMEMOTO switch (optname) { 3170f95d4633SHajimu UMEMOTO case IPV6_2292DSTOPTS: 3171f95d4633SHajimu UMEMOTO /* 3172f95d4633SHajimu UMEMOTO * The old advacned API is ambiguous on this point. 3173f95d4633SHajimu UMEMOTO * Our approach is to determine the position based 3174f95d4633SHajimu UMEMOTO * according to the existence of a routing header. 3175f95d4633SHajimu UMEMOTO * Note, however, that this depends on the order of the 3176f95d4633SHajimu UMEMOTO * extension headers in the ancillary data; the 1st 3177f95d4633SHajimu UMEMOTO * part of the destination options header must appear 3178f95d4633SHajimu UMEMOTO * before the routing header in the ancillary data, 3179f95d4633SHajimu UMEMOTO * too. 318018b35df8SHajimu UMEMOTO * RFC3542 solved the ambiguity by introducing 3181f95d4633SHajimu UMEMOTO * separate ancillary data or option types. 318282cd038dSYoshinobu Inoue */ 318333841545SHajimu UMEMOTO if (opt->ip6po_rthdr == NULL) 318433841545SHajimu UMEMOTO newdest = &opt->ip6po_dest1; 318533841545SHajimu UMEMOTO else 318633841545SHajimu UMEMOTO newdest = &opt->ip6po_dest2; 3187f95d4633SHajimu UMEMOTO break; 3188f95d4633SHajimu UMEMOTO case IPV6_RTHDRDSTOPTS: 3189f95d4633SHajimu UMEMOTO newdest = &opt->ip6po_dest1; 3190f95d4633SHajimu UMEMOTO break; 3191f95d4633SHajimu UMEMOTO case IPV6_DSTOPTS: 3192f95d4633SHajimu UMEMOTO newdest = &opt->ip6po_dest2; 3193f95d4633SHajimu UMEMOTO break; 3194f95d4633SHajimu UMEMOTO } 319533841545SHajimu UMEMOTO 3196f95d4633SHajimu UMEMOTO /* turn off the previous option, then set the new option. */ 3197f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, optname); 3198743eee66SSUZUKI Shinsuke *newdest = malloc(destlen, M_IP6OPT, M_NOWAIT); 3199fc4c8258SRobert Watson if (*newdest == NULL) 3200743eee66SSUZUKI Shinsuke return (ENOBUFS); 320133841545SHajimu UMEMOTO bcopy(dest, *newdest, destlen); 320233841545SHajimu UMEMOTO 320382cd038dSYoshinobu Inoue break; 320433841545SHajimu UMEMOTO } 320582cd038dSYoshinobu Inoue 3206f95d4633SHajimu UMEMOTO case IPV6_2292RTHDR: 320782cd038dSYoshinobu Inoue case IPV6_RTHDR: 320833841545SHajimu UMEMOTO { 320933841545SHajimu UMEMOTO struct ip6_rthdr *rth; 321033841545SHajimu UMEMOTO int rthlen; 321133841545SHajimu UMEMOTO 3212f95d4633SHajimu UMEMOTO if (len == 0) { 3213f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_RTHDR); 3214f95d4633SHajimu UMEMOTO break; /* just remove the option */ 3215f95d4633SHajimu UMEMOTO } 3216f95d4633SHajimu UMEMOTO 3217f95d4633SHajimu UMEMOTO /* message length validation */ 3218f95d4633SHajimu UMEMOTO if (len < sizeof(struct ip6_rthdr)) 321982cd038dSYoshinobu Inoue return (EINVAL); 3220f95d4633SHajimu UMEMOTO rth = (struct ip6_rthdr *)buf; 322133841545SHajimu UMEMOTO rthlen = (rth->ip6r_len + 1) << 3; 3222f95d4633SHajimu UMEMOTO if (len != rthlen) 322382cd038dSYoshinobu Inoue return (EINVAL); 322433841545SHajimu UMEMOTO 322533841545SHajimu UMEMOTO switch (rth->ip6r_type) { 322682cd038dSYoshinobu Inoue case IPV6_RTHDR_TYPE_0: 3227f95d4633SHajimu UMEMOTO if (rth->ip6r_len == 0) /* must contain one addr */ 322833841545SHajimu UMEMOTO return (EINVAL); 3229f95d4633SHajimu UMEMOTO if (rth->ip6r_len % 2) /* length must be even */ 323033841545SHajimu UMEMOTO return (EINVAL); 323133841545SHajimu UMEMOTO if (rth->ip6r_len / 2 != rth->ip6r_segleft) 323282cd038dSYoshinobu Inoue return (EINVAL); 323382cd038dSYoshinobu Inoue break; 323482cd038dSYoshinobu Inoue default: 323533841545SHajimu UMEMOTO return (EINVAL); /* not supported */ 323682cd038dSYoshinobu Inoue } 323733841545SHajimu UMEMOTO 3238f95d4633SHajimu UMEMOTO /* turn off the previous option */ 3239f95d4633SHajimu UMEMOTO ip6_clearpktopts(opt, IPV6_RTHDR); 3240743eee66SSUZUKI Shinsuke opt->ip6po_rthdr = malloc(rthlen, M_IP6OPT, M_NOWAIT); 3241743eee66SSUZUKI Shinsuke if (opt->ip6po_rthdr == NULL) 3242743eee66SSUZUKI Shinsuke return (ENOBUFS); 324333841545SHajimu UMEMOTO bcopy(rth, opt->ip6po_rthdr, rthlen); 324433841545SHajimu UMEMOTO 324582cd038dSYoshinobu Inoue break; 324633841545SHajimu UMEMOTO } 324782cd038dSYoshinobu Inoue 3248f95d4633SHajimu UMEMOTO case IPV6_USE_MIN_MTU: 3249f95d4633SHajimu UMEMOTO if (len != sizeof(int)) 3250f95d4633SHajimu UMEMOTO return (EINVAL); 3251f95d4633SHajimu UMEMOTO minmtupolicy = *(int *)buf; 3252f95d4633SHajimu UMEMOTO if (minmtupolicy != IP6PO_MINMTU_MCASTONLY && 3253f95d4633SHajimu UMEMOTO minmtupolicy != IP6PO_MINMTU_DISABLE && 3254f95d4633SHajimu UMEMOTO minmtupolicy != IP6PO_MINMTU_ALL) { 3255f95d4633SHajimu UMEMOTO return (EINVAL); 3256f95d4633SHajimu UMEMOTO } 3257f95d4633SHajimu UMEMOTO opt->ip6po_minmtu = minmtupolicy; 3258f95d4633SHajimu UMEMOTO break; 3259f95d4633SHajimu UMEMOTO 3260f95d4633SHajimu UMEMOTO case IPV6_DONTFRAG: 3261f95d4633SHajimu UMEMOTO if (len != sizeof(int)) 3262f95d4633SHajimu UMEMOTO return (EINVAL); 3263f95d4633SHajimu UMEMOTO 3264f95d4633SHajimu UMEMOTO if (uproto == IPPROTO_TCP || *(int *)buf == 0) { 3265f95d4633SHajimu UMEMOTO /* 3266f95d4633SHajimu UMEMOTO * we ignore this option for TCP sockets. 326718b35df8SHajimu UMEMOTO * (RFC3542 leaves this case unspecified.) 3268f95d4633SHajimu UMEMOTO */ 3269f95d4633SHajimu UMEMOTO opt->ip6po_flags &= ~IP6PO_DONTFRAG; 3270f95d4633SHajimu UMEMOTO } else 3271f95d4633SHajimu UMEMOTO opt->ip6po_flags |= IP6PO_DONTFRAG; 3272f95d4633SHajimu UMEMOTO break; 3273f95d4633SHajimu UMEMOTO 3274f95d4633SHajimu UMEMOTO case IPV6_PREFER_TEMPADDR: 3275f95d4633SHajimu UMEMOTO if (len != sizeof(int)) 3276f95d4633SHajimu UMEMOTO return (EINVAL); 3277f95d4633SHajimu UMEMOTO preftemp = *(int *)buf; 3278f95d4633SHajimu UMEMOTO if (preftemp != IP6PO_TEMPADDR_SYSTEM && 3279f95d4633SHajimu UMEMOTO preftemp != IP6PO_TEMPADDR_NOTPREFER && 3280f95d4633SHajimu UMEMOTO preftemp != IP6PO_TEMPADDR_PREFER) { 3281f95d4633SHajimu UMEMOTO return (EINVAL); 3282f95d4633SHajimu UMEMOTO } 3283f95d4633SHajimu UMEMOTO opt->ip6po_prefer_tempaddr = preftemp; 3284f95d4633SHajimu UMEMOTO break; 3285f95d4633SHajimu UMEMOTO 328682cd038dSYoshinobu Inoue default: 328782cd038dSYoshinobu Inoue return (ENOPROTOOPT); 3288f95d4633SHajimu UMEMOTO } /* end of switch */ 328982cd038dSYoshinobu Inoue 329082cd038dSYoshinobu Inoue return (0); 329182cd038dSYoshinobu Inoue } 329282cd038dSYoshinobu Inoue 329382cd038dSYoshinobu Inoue /* 329482cd038dSYoshinobu Inoue * Routine called from ip6_output() to loop back a copy of an IP6 multicast 329582cd038dSYoshinobu Inoue * packet to the input queue of a specified interface. Note that this 329682cd038dSYoshinobu Inoue * calls the output routine of the loopback "driver", but with an interface 329782cd038dSYoshinobu Inoue * pointer that might NOT be &loif -- easier than replicating that code here. 329882cd038dSYoshinobu Inoue */ 329982cd038dSYoshinobu Inoue void 330056a5f52eSGleb Smirnoff ip6_mloopback(struct ifnet *ifp, struct mbuf *m) 330182cd038dSYoshinobu Inoue { 330282cd038dSYoshinobu Inoue struct mbuf *copym; 3303686cdd19SJun-ichiro itojun Hagino struct ip6_hdr *ip6; 330482cd038dSYoshinobu Inoue 3305c3bef61eSKevin Lo copym = m_copym(m, 0, M_COPYALL, M_NOWAIT); 3306686cdd19SJun-ichiro itojun Hagino if (copym == NULL) 3307686cdd19SJun-ichiro itojun Hagino return; 3308686cdd19SJun-ichiro itojun Hagino 3309686cdd19SJun-ichiro itojun Hagino /* 3310686cdd19SJun-ichiro itojun Hagino * Make sure to deep-copy IPv6 header portion in case the data 3311686cdd19SJun-ichiro itojun Hagino * is in an mbuf cluster, so that we can safely override the IPv6 3312686cdd19SJun-ichiro itojun Hagino * header portion later. 3313686cdd19SJun-ichiro itojun Hagino */ 3314f0cace5dSRobert Watson if (!M_WRITABLE(copym) || 3315686cdd19SJun-ichiro itojun Hagino copym->m_len < sizeof(struct ip6_hdr)) { 3316686cdd19SJun-ichiro itojun Hagino copym = m_pullup(copym, sizeof(struct ip6_hdr)); 3317686cdd19SJun-ichiro itojun Hagino if (copym == NULL) 3318686cdd19SJun-ichiro itojun Hagino return; 331982cd038dSYoshinobu Inoue } 3320686cdd19SJun-ichiro itojun Hagino ip6 = mtod(copym, struct ip6_hdr *); 332133841545SHajimu UMEMOTO /* 332233841545SHajimu UMEMOTO * clear embedded scope identifiers if necessary. 332333841545SHajimu UMEMOTO * in6_clearscope will touch the addresses only when necessary. 332433841545SHajimu UMEMOTO */ 332533841545SHajimu UMEMOTO in6_clearscope(&ip6->ip6_src); 332633841545SHajimu UMEMOTO in6_clearscope(&ip6->ip6_dst); 3327654bdb5aSAndrey V. Elsukov if (copym->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6) { 3328654bdb5aSAndrey V. Elsukov copym->m_pkthdr.csum_flags |= CSUM_DATA_VALID_IPV6 | 3329654bdb5aSAndrey V. Elsukov CSUM_PSEUDO_HDR; 3330654bdb5aSAndrey V. Elsukov copym->m_pkthdr.csum_data = 0xffff; 3331654bdb5aSAndrey V. Elsukov } 3332331dff07SAlexander V. Chernikov if_simloop(ifp, copym, AF_INET6, 0); 333382cd038dSYoshinobu Inoue } 333482cd038dSYoshinobu Inoue 333582cd038dSYoshinobu Inoue /* 333682cd038dSYoshinobu Inoue * Chop IPv6 header off from the payload. 333782cd038dSYoshinobu Inoue */ 333882cd038dSYoshinobu Inoue static int 33391272577eSXin LI ip6_splithdr(struct mbuf *m, struct ip6_exthdrs *exthdrs) 334082cd038dSYoshinobu Inoue { 334182cd038dSYoshinobu Inoue struct mbuf *mh; 334282cd038dSYoshinobu Inoue struct ip6_hdr *ip6; 334382cd038dSYoshinobu Inoue 334482cd038dSYoshinobu Inoue ip6 = mtod(m, struct ip6_hdr *); 334582cd038dSYoshinobu Inoue if (m->m_len > sizeof(*ip6)) { 33467b07d1beSGleb Smirnoff mh = m_gethdr(M_NOWAIT, MT_DATA); 33477b07d1beSGleb Smirnoff if (mh == NULL) { 334882cd038dSYoshinobu Inoue m_freem(m); 334982cd038dSYoshinobu Inoue return ENOBUFS; 335082cd038dSYoshinobu Inoue } 335110e5acc3SGleb Smirnoff m_move_pkthdr(mh, m); 3352ed6a66caSRobert Watson M_ALIGN(mh, sizeof(*ip6)); 335382cd038dSYoshinobu Inoue m->m_len -= sizeof(*ip6); 335482cd038dSYoshinobu Inoue m->m_data += sizeof(*ip6); 335582cd038dSYoshinobu Inoue mh->m_next = m; 335682cd038dSYoshinobu Inoue m = mh; 335782cd038dSYoshinobu Inoue m->m_len = sizeof(*ip6); 335882cd038dSYoshinobu Inoue bcopy((caddr_t)ip6, mtod(m, caddr_t), sizeof(*ip6)); 335982cd038dSYoshinobu Inoue } 336082cd038dSYoshinobu Inoue exthdrs->ip6e_ip6 = m; 336182cd038dSYoshinobu Inoue return 0; 336282cd038dSYoshinobu Inoue } 336382cd038dSYoshinobu Inoue 336482cd038dSYoshinobu Inoue /* 336582cd038dSYoshinobu Inoue * Compute IPv6 extension header length. 336682cd038dSYoshinobu Inoue */ 336782cd038dSYoshinobu Inoue int 33680ecd976eSBjoern A. Zeeb ip6_optlen(struct inpcb *inp) 336982cd038dSYoshinobu Inoue { 337082cd038dSYoshinobu Inoue int len; 337182cd038dSYoshinobu Inoue 33720ecd976eSBjoern A. Zeeb if (!inp->in6p_outputopts) 337382cd038dSYoshinobu Inoue return 0; 337482cd038dSYoshinobu Inoue 337582cd038dSYoshinobu Inoue len = 0; 337682cd038dSYoshinobu Inoue #define elen(x) \ 337782cd038dSYoshinobu Inoue (((struct ip6_ext *)(x)) ? (((struct ip6_ext *)(x))->ip6e_len + 1) << 3 : 0) 337882cd038dSYoshinobu Inoue 33790ecd976eSBjoern A. Zeeb len += elen(inp->in6p_outputopts->ip6po_hbh); 33800ecd976eSBjoern A. Zeeb if (inp->in6p_outputopts->ip6po_rthdr) 338133841545SHajimu UMEMOTO /* dest1 is valid with rthdr only */ 33820ecd976eSBjoern A. Zeeb len += elen(inp->in6p_outputopts->ip6po_dest1); 33830ecd976eSBjoern A. Zeeb len += elen(inp->in6p_outputopts->ip6po_rthdr); 33840ecd976eSBjoern A. Zeeb len += elen(inp->in6p_outputopts->ip6po_dest2); 338582cd038dSYoshinobu Inoue return len; 338682cd038dSYoshinobu Inoue #undef elen 338782cd038dSYoshinobu Inoue } 3388