1139826Simp/*- 253541Sshin * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 353541Sshin * All rights reserved. 453541Sshin * 553541Sshin * Redistribution and use in source and binary forms, with or without 653541Sshin * modification, are permitted provided that the following conditions 753541Sshin * are met: 853541Sshin * 1. Redistributions of source code must retain the above copyright 953541Sshin * notice, this list of conditions and the following disclaimer. 1053541Sshin * 2. Redistributions in binary form must reproduce the above copyright 1153541Sshin * notice, this list of conditions and the following disclaimer in the 1253541Sshin * documentation and/or other materials provided with the distribution. 1353541Sshin * 3. Neither the name of the project nor the names of its contributors 1453541Sshin * may be used to endorse or promote products derived from this software 1553541Sshin * without specific prior written permission. 1653541Sshin * 1753541Sshin * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 1853541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1953541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2053541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2153541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2253541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2353541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2453541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2553541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2653541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2753541Sshin * SUCH DAMAGE. 2853541Sshin */ 2953541Sshin 30139826Simp/*- 3153541Sshin * Copyright (c) 1982, 1986, 1988, 1993 32180305Srwatson * The Regents of the University of California. 33180305Srwatson * All rights reserved. 3453541Sshin * 3553541Sshin * Redistribution and use in source and binary forms, with or without 3653541Sshin * modification, are permitted provided that the following conditions 3753541Sshin * are met: 3853541Sshin * 1. Redistributions of source code must retain the above copyright 3953541Sshin * notice, this list of conditions and the following disclaimer. 4053541Sshin * 2. Redistributions in binary form must reproduce the above copyright 4153541Sshin * notice, this list of conditions and the following disclaimer in the 4253541Sshin * documentation and/or other materials provided with the distribution. 4353541Sshin * 4. Neither the name of the University nor the names of its contributors 4453541Sshin * may be used to endorse or promote products derived from this software 4553541Sshin * without specific prior written permission. 4653541Sshin * 4753541Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 4853541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4953541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5053541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5153541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5253541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5353541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5453541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5553541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5653541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5753541Sshin * SUCH DAMAGE. 5853541Sshin * 5953541Sshin * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 6053541Sshin */ 6153541Sshin 62174510Sobrien#include <sys/cdefs.h> 63174510Sobrien__FBSDID("$FreeBSD: stable/11/sys/netinet6/raw_ip6.c 347688 2019-05-16 11:20:02Z tuexen $"); 64174510Sobrien 6555009Sshin#include "opt_ipsec.h" 6678064Sume#include "opt_inet6.h" 6755009Sshin 6853541Sshin#include <sys/param.h> 6995759Stanimura#include <sys/errno.h> 70185435Sbz#include <sys/jail.h> 71253085Sae#include <sys/kernel.h> 7295759Stanimura#include <sys/lock.h> 7353541Sshin#include <sys/malloc.h> 7495759Stanimura#include <sys/mbuf.h> 75170689Srwatson#include <sys/priv.h> 7653541Sshin#include <sys/proc.h> 7795759Stanimura#include <sys/protosw.h> 7895759Stanimura#include <sys/signalvar.h> 7953541Sshin#include <sys/socket.h> 8053541Sshin#include <sys/socketvar.h> 8195759Stanimura#include <sys/sx.h> 82148385Sume#include <sys/syslog.h> 8353541Sshin 8453541Sshin#include <net/if.h> 85257176Sglebius#include <net/if_var.h> 8695759Stanimura#include <net/if_types.h> 8753541Sshin#include <net/route.h> 88185571Sbz#include <net/vnet.h> 8953541Sshin 9053541Sshin#include <netinet/in.h> 9153541Sshin#include <netinet/in_var.h> 9253541Sshin#include <netinet/in_systm.h> 93185571Sbz#include <netinet/in_pcb.h> 94185571Sbz 9595759Stanimura#include <netinet/icmp6.h> 9662587Sitojun#include <netinet/ip6.h> 97211501Sanchie#include <netinet/ip_var.h> 9895759Stanimura#include <netinet6/ip6protosw.h> 9956723Sshin#include <netinet6/ip6_mroute.h> 10053541Sshin#include <netinet6/in6_pcb.h> 10195759Stanimura#include <netinet6/ip6_var.h> 10253541Sshin#include <netinet6/nd6.h> 10395759Stanimura#include <netinet6/raw_ip6.h> 10462587Sitojun#include <netinet6/scope6_var.h> 105211501Sanchie#include <netinet6/send.h> 10653541Sshin 107315514Sae#include <netipsec/ipsec_support.h> 108105199Ssam 10953541Sshin#include <machine/stdarg.h> 11053541Sshin 11153541Sshin#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 11253541Sshin#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 11353541Sshin 11453541Sshin/* 11553541Sshin * Raw interface to IP6 protocol. 11653541Sshin */ 11753541Sshin 118195699SrwatsonVNET_DECLARE(struct inpcbhead, ripcb); 119195699SrwatsonVNET_DECLARE(struct inpcbinfo, ripcbinfo); 120195727Srwatson#define V_ripcb VNET(ripcb) 121195727Srwatson#define V_ripcbinfo VNET(ripcbinfo) 122185348Szec 12353541Sshinextern u_long rip_sendspace; 12453541Sshinextern u_long rip_recvspace; 12553541Sshin 126253085SaeVNET_PCPUSTAT_DEFINE(struct rip6stat, rip6stat); 127253085SaeVNET_PCPUSTAT_SYSINIT(rip6stat); 128207369Sbz 129253085Sae#ifdef VIMAGE 130253085SaeVNET_PCPUSTAT_SYSUNINIT(rip6stat); 131253085Sae#endif /* VIMAGE */ 132253085Sae 13353541Sshin/* 134191672Sbms * Hooks for multicast routing. They all default to NULL, so leave them not 135191672Sbms * initialized and rely on BSS being set to 0. 136166938Sbms */ 137191672Sbms 138191672Sbms/* 139191672Sbms * The socket used to communicate with the multicast routing daemon. 140191672Sbms */ 141195699SrwatsonVNET_DEFINE(struct socket *, ip6_mrouter); 142191672Sbms 143191672Sbms/* 144191672Sbms * The various mrouter functions. 145191672Sbms */ 146166938Sbmsint (*ip6_mrouter_set)(struct socket *, struct sockopt *); 147166938Sbmsint (*ip6_mrouter_get)(struct socket *, struct sockopt *); 148166938Sbmsint (*ip6_mrouter_done)(void); 149166938Sbmsint (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 150194581Srdivackyint (*mrt6_ioctl)(u_long, caddr_t); 151166938Sbms 152166938Sbms/* 153180305Srwatson * Setup generic address and protocol structures for raw_input routine, then 154180305Srwatson * pass them along with mbuf chain. 15553541Sshin */ 15653541Sshinint 157171259Sdelphijrip6_input(struct mbuf **mp, int *offp, int proto) 15853541Sshin{ 159191672Sbms struct ifnet *ifp; 16053541Sshin struct mbuf *m = *mp; 161331643Sdim struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 162331643Sdim struct inpcb *in6p; 163298075Spfg struct inpcb *last = NULL; 16478064Sume struct mbuf *opts = NULL; 165121901Sume struct sockaddr_in6 fromsa; 16653541Sshin 167252007Sae RIP6STAT_INC(rip6s_ipackets); 16878064Sume 169121901Sume init_sin6(&fromsa, m); /* general init */ 17053541Sshin 171191672Sbms ifp = m->m_pkthdr.rcvif; 172191672Sbms 173181803Sbz INP_INFO_RLOCK(&V_ripcbinfo); 174181803Sbz LIST_FOREACH(in6p, &V_ripcb, inp_list) { 175185435Sbz /* XXX inp locking */ 176186141Sbz if ((in6p->inp_vflag & INP_IPV6) == 0) 17753541Sshin continue; 178186141Sbz if (in6p->inp_ip_p && 179186141Sbz in6p->inp_ip_p != proto) 180180850Smav continue; 18153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 18253541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 183180850Smav continue; 18453541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 18553541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 186180850Smav continue; 187200473Sbz if (jailed_without_vnet(in6p->inp_cred)) { 188191672Sbms /* 189191672Sbms * Allow raw socket in jail to receive multicast; 190191672Sbms * assume process had PRIV_NETINET_RAW at attach, 191191672Sbms * and fall through into normal filter path if so. 192191672Sbms */ 193191672Sbms if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) && 194191672Sbms prison_check_ip6(in6p->inp_cred, 195191672Sbms &ip6->ip6_dst) != 0) 196191672Sbms continue; 197191672Sbms } 198248180Sae INP_RLOCK(in6p); 19978064Sume if (in6p->in6p_cksum != -1) { 200252007Sae RIP6STAT_INC(rip6s_isum); 201347688Stuexen if (m->m_pkthdr.len - (*offp + in6p->in6p_cksum) < 2 || 202347688Stuexen in6_cksum(m, proto, *offp, 20378064Sume m->m_pkthdr.len - *offp)) { 204180932Smav INP_RUNLOCK(in6p); 205252007Sae RIP6STAT_INC(rip6s_badsum); 206180850Smav continue; 20778064Sume } 20853541Sshin } 209191672Sbms /* 210191672Sbms * If this raw socket has multicast state, and we 211191672Sbms * have received a multicast, check if this socket 212191672Sbms * should receive it, as multicast filtering is now 213191672Sbms * the responsibility of the transport layer. 214191672Sbms */ 215191672Sbms if (in6p->in6p_moptions && 216191672Sbms IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 217199518Sbms /* 218199518Sbms * If the incoming datagram is for MLD, allow it 219199518Sbms * through unconditionally to the raw socket. 220199518Sbms * 221199518Sbms * Use the M_RTALERT_MLD flag to check for MLD 222199518Sbms * traffic without having to inspect the mbuf chain 223199518Sbms * more deeply, as all MLDv1/v2 host messages MUST 224199518Sbms * contain the Router Alert option. 225199518Sbms * 226199518Sbms * In the case of MLDv1, we may not have explicitly 227199518Sbms * joined the group, and may have set IFF_ALLMULTI 228199518Sbms * on the interface. im6o_mc_filter() may discard 229199518Sbms * control traffic we actually need to see. 230199518Sbms * 231199518Sbms * Userland multicast routing daemons should continue 232199518Sbms * filter the control traffic appropriately. 233199518Sbms */ 234191672Sbms int blocked; 235191672Sbms 236199518Sbms blocked = MCAST_PASS; 237199518Sbms if ((m->m_flags & M_RTALERT_MLD) == 0) { 238199518Sbms struct sockaddr_in6 mcaddr; 239191672Sbms 240199518Sbms bzero(&mcaddr, sizeof(struct sockaddr_in6)); 241199518Sbms mcaddr.sin6_len = sizeof(struct sockaddr_in6); 242199518Sbms mcaddr.sin6_family = AF_INET6; 243199518Sbms mcaddr.sin6_addr = ip6->ip6_dst; 244199518Sbms 245199518Sbms blocked = im6o_mc_filter(in6p->in6p_moptions, 246199518Sbms ifp, 247199518Sbms (struct sockaddr *)&mcaddr, 248199518Sbms (struct sockaddr *)&fromsa); 249199518Sbms } 250191672Sbms if (blocked != MCAST_PASS) { 251191672Sbms IP6STAT_INC(ip6s_notmember); 252211301Sbz INP_RUNLOCK(in6p); 253191672Sbms continue; 254191672Sbms } 255191672Sbms } 256186163Skmacy if (last != NULL) { 25753541Sshin struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 25878064Sume 259315514Sae#if defined(IPSEC) || defined(IPSEC_SUPPORT) 26078064Sume /* 26178064Sume * Check AH/ESP integrity. 26278064Sume */ 263315514Sae if (IPSEC_ENABLED(ipv6)) { 264315514Sae if (n != NULL && 265315514Sae IPSEC_CHECK_POLICY(ipv6, n, last) != 0) { 266315514Sae m_freem(n); 267315514Sae /* Do not inject data into pcb. */ 268315514Sae n = NULL; 269315514Sae } 270315514Sae } 271171167Sgnn#endif /* IPSEC */ 27253541Sshin if (n) { 273186223Sbz if (last->inp_flags & INP_CONTROLOPTS || 274186141Sbz last->inp_socket->so_options & SO_TIMESTAMP) 275121674Sume ip6_savecontrol(last, n, &opts); 27653541Sshin /* strip intermediate headers */ 27753541Sshin m_adj(n, *offp); 278186141Sbz if (sbappendaddr(&last->inp_socket->so_rcv, 279121901Sume (struct sockaddr *)&fromsa, 28053541Sshin n, opts) == 0) { 28153541Sshin m_freem(n); 28253541Sshin if (opts) 28353541Sshin m_freem(opts); 284252007Sae RIP6STAT_INC(rip6s_fullsock); 28597658Stanimura } else 286186141Sbz sorwakeup(last->inp_socket); 28753541Sshin opts = NULL; 28853541Sshin } 289178377Srwatson INP_RUNLOCK(last); 29053541Sshin } 29153541Sshin last = in6p; 29253541Sshin } 293181803Sbz INP_INFO_RUNLOCK(&V_ripcbinfo); 294315514Sae#if defined(IPSEC) || defined(IPSEC_SUPPORT) 29578064Sume /* 29678064Sume * Check AH/ESP integrity. 29778064Sume */ 298315514Sae if (IPSEC_ENABLED(ipv6) && last != NULL && 299315514Sae IPSEC_CHECK_POLICY(ipv6, m, last) != 0) { 30078064Sume m_freem(m); 301249294Sae IP6STAT_DEC(ip6s_delivered); 302180305Srwatson /* Do not inject data into pcb. */ 303178377Srwatson INP_RUNLOCK(last); 304105199Ssam } else 305171167Sgnn#endif /* IPSEC */ 306186163Skmacy if (last != NULL) { 307186223Sbz if (last->inp_flags & INP_CONTROLOPTS || 308186141Sbz last->inp_socket->so_options & SO_TIMESTAMP) 309121674Sume ip6_savecontrol(last, m, &opts); 310180305Srwatson /* Strip intermediate headers. */ 31153541Sshin m_adj(m, *offp); 312186141Sbz if (sbappendaddr(&last->inp_socket->so_rcv, 313180305Srwatson (struct sockaddr *)&fromsa, m, opts) == 0) { 31453541Sshin m_freem(m); 31553541Sshin if (opts) 31653541Sshin m_freem(opts); 317252007Sae RIP6STAT_INC(rip6s_fullsock); 31897658Stanimura } else 319186141Sbz sorwakeup(last->inp_socket); 320178377Srwatson INP_RUNLOCK(last); 32153541Sshin } else { 322252007Sae RIP6STAT_INC(rip6s_nosock); 32378064Sume if (m->m_flags & M_MCAST) 324252007Sae RIP6STAT_INC(rip6s_nosockmcast); 32553541Sshin if (proto == IPPROTO_NONE) 32653541Sshin m_freem(m); 327329157Sae else 32853541Sshin icmp6_error(m, ICMP6_PARAM_PROB, 329180305Srwatson ICMP6_PARAMPROB_NEXTHEADER, 330329157Sae ip6_get_prevhdr(m, *offp)); 331249294Sae IP6STAT_DEC(ip6s_delivered); 33253541Sshin } 333180305Srwatson return (IPPROTO_DONE); 33453541Sshin} 33553541Sshin 33662587Sitojunvoid 337171259Sdelphijrip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 33862587Sitojun{ 33962587Sitojun struct ip6_hdr *ip6; 34062587Sitojun struct mbuf *m; 34162587Sitojun int off = 0; 34278064Sume struct ip6ctlparam *ip6cp = NULL; 34378064Sume const struct sockaddr_in6 *sa6_src = NULL; 344125776Sume void *cmdarg; 345175162Sobrien struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 34662587Sitojun 34762587Sitojun if (sa->sa_family != AF_INET6 || 34862587Sitojun sa->sa_len != sizeof(struct sockaddr_in6)) 34962587Sitojun return; 35062587Sitojun 35162587Sitojun if ((unsigned)cmd >= PRC_NCMDS) 35262587Sitojun return; 35362587Sitojun if (PRC_IS_REDIRECT(cmd)) 35462587Sitojun notify = in6_rtchange, d = NULL; 35562587Sitojun else if (cmd == PRC_HOSTDEAD) 35662587Sitojun d = NULL; 35762587Sitojun else if (inet6ctlerrmap[cmd] == 0) 35862587Sitojun return; 35962587Sitojun 360180305Srwatson /* 361180305Srwatson * If the parameter is from icmp6, decode it. 362180305Srwatson */ 36362587Sitojun if (d != NULL) { 36478064Sume ip6cp = (struct ip6ctlparam *)d; 36562587Sitojun m = ip6cp->ip6c_m; 36662587Sitojun ip6 = ip6cp->ip6c_ip6; 36762587Sitojun off = ip6cp->ip6c_off; 368125776Sume cmdarg = ip6cp->ip6c_cmdarg; 36978064Sume sa6_src = ip6cp->ip6c_src; 37062587Sitojun } else { 37162587Sitojun m = NULL; 37262587Sitojun ip6 = NULL; 373125776Sume cmdarg = NULL; 37478064Sume sa6_src = &sa6_any; 37562587Sitojun } 37662587Sitojun 377181803Sbz (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 378180305Srwatson (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 37962587Sitojun} 38062587Sitojun 38153541Sshin/* 382180305Srwatson * Generate IPv6 header and pass packet to ip6_output. Tack on options user 383180305Srwatson * may have setup with control call. 38453541Sshin */ 38553541Sshinint 386269699Skevlorip6_output(struct mbuf *m, struct socket *so, ...) 38753541Sshin{ 388120941Sume struct mbuf *control; 389211501Sanchie struct m_tag *mtag; 39053541Sshin struct sockaddr_in6 *dstsock; 39153541Sshin struct in6_addr *dst; 39253541Sshin struct ip6_hdr *ip6; 39353541Sshin struct inpcb *in6p; 39453541Sshin u_int plen = m->m_pkthdr.len; 39553541Sshin int error = 0; 396148247Sume struct ip6_pktopts opt, *optp; 39753541Sshin struct ifnet *oifp = NULL; 39853541Sshin int type = 0, code = 0; /* for ICMPv6 output statistics only */ 399148385Sume int scope_ambiguous = 0; 400211435Sume int use_defzone = 0; 401293633Smelifaro int hlim = 0; 402194777Sbz struct in6_addr in6a; 40353541Sshin va_list ap; 40453541Sshin 405269699Skevlo va_start(ap, so); 40653541Sshin dstsock = va_arg(ap, struct sockaddr_in6 *); 40753541Sshin control = va_arg(ap, struct mbuf *); 40853541Sshin va_end(ap); 40953541Sshin 410186141Sbz in6p = sotoinpcb(so); 411178285Srwatson INP_WLOCK(in6p); 41253541Sshin 41353541Sshin dst = &dstsock->sin6_addr; 414186170Skmacy if (control != NULL) { 415148242Sume if ((error = ip6_setpktopts(control, &opt, 416175630Sbz in6p->in6p_outputopts, so->so_cred, 417175630Sbz so->so_proto->pr_protocol)) != 0) { 41853541Sshin goto bad; 419121472Sume } 420148247Sume optp = &opt; 421148247Sume } else 422148247Sume optp = in6p->in6p_outputopts; 42353541Sshin 42453541Sshin /* 425148385Sume * Check and convert scope zone ID into internal form. 426180305Srwatson * 427148385Sume * XXX: we may still need to determine the zone later. 428148385Sume */ 429148385Sume if (!(so->so_state & SS_ISCONNECTED)) { 430211530Sume if (!optp || !optp->ip6po_pktinfo || 431211530Sume !optp->ip6po_pktinfo->ipi6_ifindex) 432211435Sume use_defzone = V_ip6_use_defzone; 433211435Sume if (dstsock->sin6_scope_id == 0 && !use_defzone) 434148385Sume scope_ambiguous = 1; 435211435Sume if ((error = sa6_embedscope(dstsock, use_defzone)) != 0) 436148385Sume goto bad; 437148385Sume } 438148385Sume 439148385Sume /* 440180305Srwatson * For an ICMPv6 packet, we should know its type and code to update 441180305Srwatson * statistics. 44253541Sshin */ 44353541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 44453541Sshin struct icmp6_hdr *icmp6; 44553541Sshin if (m->m_len < sizeof(struct icmp6_hdr) && 44653541Sshin (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 44753541Sshin error = ENOBUFS; 44853541Sshin goto bad; 44953541Sshin } 45053541Sshin icmp6 = mtod(m, struct icmp6_hdr *); 45153541Sshin type = icmp6->icmp6_type; 45253541Sshin code = icmp6->icmp6_code; 45353541Sshin } 45453541Sshin 455243882Sglebius M_PREPEND(m, sizeof(*ip6), M_NOWAIT); 456133592Srwatson if (m == NULL) { 457133592Srwatson error = ENOBUFS; 458133592Srwatson goto bad; 459133592Srwatson } 46053541Sshin ip6 = mtod(m, struct ip6_hdr *); 46153541Sshin 46253541Sshin /* 46353541Sshin * Source address selection. 46453541Sshin */ 465293633Smelifaro error = in6_selectsrc_socket(dstsock, optp, in6p, so->so_cred, 466293633Smelifaro scope_ambiguous, &in6a, &hlim); 467293633Smelifaro 468194777Sbz if (error) 469121472Sume goto bad; 470207277Sbz error = prison_check_ip6(in6p->inp_cred, &in6a); 471188144Sjamie if (error != 0) 472188144Sjamie goto bad; 473194777Sbz ip6->ip6_src = in6a; 474148385Sume 475148385Sume ip6->ip6_dst = dstsock->sin6_addr; 476148385Sume 477180305Srwatson /* 478180305Srwatson * Fill in the rest of the IPv6 header fields. 479180305Srwatson */ 48055009Sshin ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 481186141Sbz (in6p->inp_flow & IPV6_FLOWINFO_MASK); 48255009Sshin ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 483180305Srwatson (IPV6_VERSION & IPV6_VERSION_MASK); 484180305Srwatson 485180305Srwatson /* 486180305Srwatson * ip6_plen will be filled in ip6_output, so not fill it here. 487180305Srwatson */ 488186141Sbz ip6->ip6_nxt = in6p->inp_ip_p; 489293633Smelifaro ip6->ip6_hlim = hlim; 49053541Sshin 49153541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 49253541Sshin in6p->in6p_cksum != -1) { 49353541Sshin struct mbuf *n; 49453541Sshin int off; 49553541Sshin u_int16_t *p; 49653541Sshin 497180305Srwatson /* Compute checksum. */ 49853541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 49953541Sshin off = offsetof(struct icmp6_hdr, icmp6_cksum); 50053541Sshin else 50153541Sshin off = in6p->in6p_cksum; 502347687Stuexen if (plen < off + 2) { 50353541Sshin error = EINVAL; 50453541Sshin goto bad; 50553541Sshin } 50653541Sshin off += sizeof(struct ip6_hdr); 50753541Sshin 50853541Sshin n = m; 50953541Sshin while (n && n->m_len <= off) { 51053541Sshin off -= n->m_len; 51153541Sshin n = n->m_next; 51253541Sshin } 51353541Sshin if (!n) 51453541Sshin goto bad; 51553541Sshin p = (u_int16_t *)(mtod(n, caddr_t) + off); 51653541Sshin *p = 0; 51753541Sshin *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 51853541Sshin } 51953541Sshin 520211501Sanchie /* 521211501Sanchie * Send RA/RS messages to user land for protection, before sending 522211501Sanchie * them to rtadvd/rtsol. 523211501Sanchie */ 524211501Sanchie if ((send_sendso_input_hook != NULL) && 525211501Sanchie so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 526211501Sanchie switch (type) { 527211501Sanchie case ND_ROUTER_ADVERT: 528211501Sanchie case ND_ROUTER_SOLICIT: 529211501Sanchie mtag = m_tag_get(PACKET_TAG_ND_OUTGOING, 530211501Sanchie sizeof(unsigned short), M_NOWAIT); 531211501Sanchie if (mtag == NULL) 532211501Sanchie goto bad; 533211501Sanchie m_tag_prepend(m, mtag); 534211501Sanchie } 535211501Sanchie } 536211501Sanchie 537148247Sume error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 53853541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 53953541Sshin if (oifp) 54053541Sshin icmp6_ifoutstat_inc(oifp, type, code); 541190964Srwatson ICMP6STAT_INC(icp6s_outhist[type]); 54278064Sume } else 543252007Sae RIP6STAT_INC(rip6s_opackets); 54453541Sshin 54553541Sshin goto freectl; 54653541Sshin 54753541Sshin bad: 54853541Sshin if (m) 54953541Sshin m_freem(m); 55053541Sshin 55153541Sshin freectl: 552186170Skmacy if (control != NULL) { 553148247Sume ip6_clearpktopts(&opt, -1); 55453541Sshin m_freem(control); 55578064Sume } 556178285Srwatson INP_WUNLOCK(in6p); 557120856Sume return (error); 55853541Sshin} 55953541Sshin 56053541Sshin/* 56153541Sshin * Raw IPv6 socket option processing. 56253541Sshin */ 56353541Sshinint 564171259Sdelphijrip6_ctloutput(struct socket *so, struct sockopt *sopt) 56553541Sshin{ 566231852Sbz struct inpcb *inp; 56753541Sshin int error; 56853541Sshin 56953541Sshin if (sopt->sopt_level == IPPROTO_ICMPV6) 57053541Sshin /* 57153541Sshin * XXX: is it better to call icmp6_ctloutput() directly 57253541Sshin * from protosw? 57353541Sshin */ 574120856Sume return (icmp6_ctloutput(so, sopt)); 575231852Sbz else if (sopt->sopt_level != IPPROTO_IPV6) { 576231852Sbz if (sopt->sopt_level == SOL_SOCKET && 577231852Sbz sopt->sopt_name == SO_SETFIB) { 578231852Sbz inp = sotoinpcb(so); 579231852Sbz INP_WLOCK(inp); 580231852Sbz inp->inp_inc.inc_fibnum = so->so_fibnum; 581231852Sbz INP_WUNLOCK(inp); 582231852Sbz return (0); 583231852Sbz } 58453541Sshin return (EINVAL); 585231852Sbz } 58653541Sshin 58753541Sshin error = 0; 58853541Sshin 58953541Sshin switch (sopt->sopt_dir) { 59053541Sshin case SOPT_GET: 59153541Sshin switch (sopt->sopt_name) { 59256723Sshin case MRT6_INIT: 59356723Sshin case MRT6_DONE: 59456723Sshin case MRT6_ADD_MIF: 59556723Sshin case MRT6_DEL_MIF: 59656723Sshin case MRT6_ADD_MFC: 59756723Sshin case MRT6_DEL_MFC: 59856723Sshin case MRT6_PIM: 599166938Sbms error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 600166938Sbms EOPNOTSUPP; 60156723Sshin break; 602121578Sume case IPV6_CHECKSUM: 603121578Sume error = ip6_raw_ctloutput(so, sopt); 604121578Sume break; 60553541Sshin default: 60653541Sshin error = ip6_ctloutput(so, sopt); 60753541Sshin break; 60853541Sshin } 60953541Sshin break; 61053541Sshin 61153541Sshin case SOPT_SET: 61253541Sshin switch (sopt->sopt_name) { 61356723Sshin case MRT6_INIT: 61456723Sshin case MRT6_DONE: 61556723Sshin case MRT6_ADD_MIF: 61656723Sshin case MRT6_DEL_MIF: 61756723Sshin case MRT6_ADD_MFC: 61856723Sshin case MRT6_DEL_MFC: 61956723Sshin case MRT6_PIM: 620166938Sbms error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 621166938Sbms EOPNOTSUPP; 62256723Sshin break; 623121578Sume case IPV6_CHECKSUM: 624121578Sume error = ip6_raw_ctloutput(so, sopt); 625121578Sume break; 62653541Sshin default: 62753541Sshin error = ip6_ctloutput(so, sopt); 62853541Sshin break; 62953541Sshin } 63053541Sshin break; 63153541Sshin } 63253541Sshin 63353541Sshin return (error); 63453541Sshin} 63553541Sshin 63653541Sshinstatic int 63783366Sjulianrip6_attach(struct socket *so, int proto, struct thread *td) 63853541Sshin{ 63953541Sshin struct inpcb *inp; 640144261Ssam struct icmp6_filter *filter; 641157676Srwatson int error; 64253541Sshin 64353541Sshin inp = sotoinpcb(so); 644157374Srwatson KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 645180305Srwatson 646175630Sbz error = priv_check(td, PRIV_NETINET_RAW); 647175630Sbz if (error) 648180305Srwatson return (error); 64955009Sshin error = soreserve(so, rip_sendspace, rip_recvspace); 650157374Srwatson if (error) 651180305Srwatson return (error); 652184214Sdes filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 653157374Srwatson if (filter == NULL) 654180305Srwatson return (ENOMEM); 655181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 656181803Sbz error = in_pcballoc(so, &V_ripcbinfo); 657132714Srwatson if (error) { 658181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 659184205Sdes free(filter, M_PCB); 660180305Srwatson return (error); 661132714Srwatson } 66253541Sshin inp = (struct inpcb *)so->so_pcb; 663181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 66453541Sshin inp->inp_vflag |= INP_IPV6; 665186141Sbz inp->inp_ip_p = (long)proto; 66653541Sshin inp->in6p_hops = -1; /* use kernel default */ 66753541Sshin inp->in6p_cksum = -1; 668144261Ssam inp->in6p_icmp6filt = filter; 66953541Sshin ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 670178285Srwatson INP_WUNLOCK(inp); 671180305Srwatson return (0); 67253541Sshin} 67353541Sshin 674157370Srwatsonstatic void 67553541Sshinrip6_detach(struct socket *so) 67653541Sshin{ 67753541Sshin struct inpcb *inp; 67853541Sshin 67953541Sshin inp = sotoinpcb(so); 680157374Srwatson KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 681160549Srwatson 682191672Sbms if (so == V_ip6_mrouter && ip6_mrouter_done) 683166938Sbms ip6_mrouter_done(); 68453541Sshin /* xxx: RSVP */ 685181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 686178285Srwatson INP_WLOCK(inp); 687184205Sdes free(inp->in6p_icmp6filt, M_PCB); 688185344Sbz in_pcbdetach(inp); 689185370Sbz in_pcbfree(inp); 690181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 69153541Sshin} 69253541Sshin 693160549Srwatson/* XXXRW: This can't ever be called. */ 694157366Srwatsonstatic void 69553541Sshinrip6_abort(struct socket *so) 69653541Sshin{ 697160549Srwatson struct inpcb *inp; 698160549Srwatson 699160549Srwatson inp = sotoinpcb(so); 700160549Srwatson KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 701160549Srwatson 70253541Sshin soisdisconnected(so); 70353541Sshin} 70453541Sshin 705160549Srwatsonstatic void 706160549Srwatsonrip6_close(struct socket *so) 707160549Srwatson{ 708160549Srwatson struct inpcb *inp; 709160549Srwatson 710160549Srwatson inp = sotoinpcb(so); 711160549Srwatson KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 712160549Srwatson 713160549Srwatson soisdisconnected(so); 714160549Srwatson} 715160549Srwatson 71653541Sshinstatic int 71753541Sshinrip6_disconnect(struct socket *so) 71853541Sshin{ 719180305Srwatson struct inpcb *inp; 72053541Sshin 721180305Srwatson inp = sotoinpcb(so); 722180305Srwatson KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 723180305Srwatson 72497658Stanimura if ((so->so_state & SS_ISCONNECTED) == 0) 725180305Srwatson return (ENOTCONN); 72653541Sshin inp->in6p_faddr = in6addr_any; 727157366Srwatson rip6_abort(so); 728157374Srwatson return (0); 72953541Sshin} 73053541Sshin 73153541Sshinstatic int 73283366Sjulianrip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 73353541Sshin{ 734180305Srwatson struct inpcb *inp; 73553541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 736194760Srwatson struct ifaddr *ifa = NULL; 737148385Sume int error = 0; 73853541Sshin 739180305Srwatson inp = sotoinpcb(so); 740157374Srwatson KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 741180305Srwatson 74253541Sshin if (nam->sa_len != sizeof(*addr)) 743180305Srwatson return (EINVAL); 744188144Sjamie if ((error = prison_check_ip6(td->td_ucred, &addr->sin6_addr)) != 0) 745188144Sjamie return (error); 746181803Sbz if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 747180305Srwatson return (EADDRNOTAVAIL); 748181803Sbz if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 749180305Srwatson return (error); 750148385Sume 75153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 752194760Srwatson (ifa = ifa_ifwithaddr((struct sockaddr *)addr)) == NULL) 753180305Srwatson return (EADDRNOTAVAIL); 754194760Srwatson if (ifa != NULL && 755194760Srwatson ((struct in6_ifaddr *)ifa)->ia6_flags & 75653541Sshin (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 75753541Sshin IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 758194760Srwatson ifa_free(ifa); 759120856Sume return (EADDRNOTAVAIL); 76053541Sshin } 761194760Srwatson if (ifa != NULL) 762194760Srwatson ifa_free(ifa); 763181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 764178285Srwatson INP_WLOCK(inp); 76553541Sshin inp->in6p_laddr = addr->sin6_addr; 766178285Srwatson INP_WUNLOCK(inp); 767181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 768180305Srwatson return (0); 76953541Sshin} 77053541Sshin 77153541Sshinstatic int 77283366Sjulianrip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 77353541Sshin{ 774180305Srwatson struct inpcb *inp; 77553541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 776194777Sbz struct in6_addr in6a; 777148385Sume int error = 0, scope_ambiguous = 0; 77853541Sshin 779180305Srwatson inp = sotoinpcb(so); 780157374Srwatson KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 781180305Srwatson 78253541Sshin if (nam->sa_len != sizeof(*addr)) 783180305Srwatson return (EINVAL); 784181803Sbz if (TAILQ_EMPTY(&V_ifnet)) 785180305Srwatson return (EADDRNOTAVAIL); 78653541Sshin if (addr->sin6_family != AF_INET6) 787180305Srwatson return (EAFNOSUPPORT); 788148385Sume 789148385Sume /* 790180305Srwatson * Application should provide a proper zone ID or the use of default 791180305Srwatson * zone IDs should be enabled. Unfortunately, some applications do 792180305Srwatson * not behave as it should, so we need a workaround. Even if an 793180305Srwatson * appropriate ID is not determined, we'll see if we can determine 794180305Srwatson * the outgoing interface. If we can, determine the zone ID based on 795180305Srwatson * the interface below. 796148385Sume */ 797181803Sbz if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 798148385Sume scope_ambiguous = 1; 799181803Sbz if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 800180305Srwatson return (error); 801148385Sume 802181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 803178285Srwatson INP_WLOCK(inp); 80453541Sshin /* Source address selection. XXX: need pcblookup? */ 805293633Smelifaro error = in6_selectsrc_socket(addr, inp->in6p_outputopts, 806293633Smelifaro inp, so->so_cred, scope_ambiguous, &in6a, NULL); 807194777Sbz if (error) { 808178285Srwatson INP_WUNLOCK(inp); 809181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 810194777Sbz return (error); 811132714Srwatson } 812148385Sume 813148385Sume inp->in6p_faddr = addr->sin6_addr; 814194777Sbz inp->in6p_laddr = in6a; 81553541Sshin soisconnected(so); 816178285Srwatson INP_WUNLOCK(inp); 817181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 818180305Srwatson return (0); 81953541Sshin} 82053541Sshin 82153541Sshinstatic int 82253541Sshinrip6_shutdown(struct socket *so) 82353541Sshin{ 824132714Srwatson struct inpcb *inp; 825132714Srwatson 826132714Srwatson inp = sotoinpcb(so); 827157374Srwatson KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 828180305Srwatson 829178285Srwatson INP_WLOCK(inp); 83053541Sshin socantsendmore(so); 831178285Srwatson INP_WUNLOCK(inp); 832180305Srwatson return (0); 83353541Sshin} 83453541Sshin 83553541Sshinstatic int 83653541Sshinrip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 837171260Sdelphij struct mbuf *control, struct thread *td) 83853541Sshin{ 839180305Srwatson struct inpcb *inp; 84053541Sshin struct sockaddr_in6 tmp; 84153541Sshin struct sockaddr_in6 *dst; 842132714Srwatson int ret; 84353541Sshin 844180305Srwatson inp = sotoinpcb(so); 845157374Srwatson KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 846180305Srwatson 847180305Srwatson /* Always copy sockaddr to avoid overwrites. */ 848132714Srwatson /* Unlocked read. */ 84953541Sshin if (so->so_state & SS_ISCONNECTED) { 85053541Sshin if (nam) { 85153541Sshin m_freem(m); 852180305Srwatson return (EISCONN); 85353541Sshin } 85453541Sshin /* XXX */ 85553541Sshin bzero(&tmp, sizeof(tmp)); 85653541Sshin tmp.sin6_family = AF_INET6; 85753541Sshin tmp.sin6_len = sizeof(struct sockaddr_in6); 858180990Srwatson INP_RLOCK(inp); 85953541Sshin bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 860180990Srwatson sizeof(struct in6_addr)); 861180990Srwatson INP_RUNLOCK(inp); 86253541Sshin dst = &tmp; 86353541Sshin } else { 86453541Sshin if (nam == NULL) { 86553541Sshin m_freem(m); 866180305Srwatson return (ENOTCONN); 86753541Sshin } 868148385Sume if (nam->sa_len != sizeof(struct sockaddr_in6)) { 869148385Sume m_freem(m); 870180305Srwatson return (EINVAL); 871148385Sume } 87262587Sitojun tmp = *(struct sockaddr_in6 *)nam; 87362587Sitojun dst = &tmp; 874148385Sume 875148385Sume if (dst->sin6_family == AF_UNSPEC) { 876148385Sume /* 877148385Sume * XXX: we allow this case for backward 878148385Sume * compatibility to buggy applications that 879148385Sume * rely on old (and wrong) kernel behavior. 880148385Sume */ 881148385Sume log(LOG_INFO, "rip6 SEND: address family is " 882148385Sume "unspec. Assume AF_INET6\n"); 883148385Sume dst->sin6_family = AF_INET6; 884148385Sume } else if (dst->sin6_family != AF_INET6) { 885148385Sume m_freem(m); 886148385Sume return(EAFNOSUPPORT); 887148385Sume } 88853541Sshin } 889132714Srwatson ret = rip6_output(m, so, dst, control); 890132714Srwatson return (ret); 89153541Sshin} 89253541Sshin 89353541Sshinstruct pr_usrreqs rip6_usrreqs = { 894137386Sphk .pru_abort = rip6_abort, 895137386Sphk .pru_attach = rip6_attach, 896137386Sphk .pru_bind = rip6_bind, 897137386Sphk .pru_connect = rip6_connect, 898137386Sphk .pru_control = in6_control, 899137386Sphk .pru_detach = rip6_detach, 900137386Sphk .pru_disconnect = rip6_disconnect, 901169462Srwatson .pru_peeraddr = in6_getpeeraddr, 902137386Sphk .pru_send = rip6_send, 903137386Sphk .pru_shutdown = rip6_shutdown, 904169462Srwatson .pru_sockaddr = in6_getsockaddr, 905160549Srwatson .pru_close = rip6_close, 90653541Sshin}; 907