raw_ip6.c revision 180850
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: head/sys/netinet6/raw_ip6.c 180850 2008-07-27 20:30:34Z mav $"); 64174510Sobrien 6555009Sshin#include "opt_ipsec.h" 6678064Sume#include "opt_inet6.h" 6755009Sshin 6853541Sshin#include <sys/param.h> 6995759Stanimura#include <sys/errno.h> 7095759Stanimura#include <sys/lock.h> 7153541Sshin#include <sys/malloc.h> 7295759Stanimura#include <sys/mbuf.h> 73170689Srwatson#include <sys/priv.h> 7453541Sshin#include <sys/proc.h> 7595759Stanimura#include <sys/protosw.h> 7695759Stanimura#include <sys/signalvar.h> 7753541Sshin#include <sys/socket.h> 7853541Sshin#include <sys/socketvar.h> 7995759Stanimura#include <sys/sx.h> 80148385Sume#include <sys/syslog.h> 8153541Sshin 8253541Sshin#include <net/if.h> 8395759Stanimura#include <net/if_types.h> 8453541Sshin#include <net/route.h> 8553541Sshin 8653541Sshin#include <netinet/in.h> 8753541Sshin#include <netinet/in_var.h> 8853541Sshin#include <netinet/in_systm.h> 8995759Stanimura#include <netinet/icmp6.h> 9095759Stanimura#include <netinet/in_pcb.h> 9162587Sitojun#include <netinet/ip6.h> 9295759Stanimura#include <netinet6/ip6protosw.h> 9356723Sshin#include <netinet6/ip6_mroute.h> 9453541Sshin#include <netinet6/in6_pcb.h> 9595759Stanimura#include <netinet6/ip6_var.h> 9653541Sshin#include <netinet6/nd6.h> 9795759Stanimura#include <netinet6/raw_ip6.h> 9862587Sitojun#include <netinet6/scope6_var.h> 9953541Sshin 100171167Sgnn#ifdef IPSEC 101105199Ssam#include <netipsec/ipsec.h> 102105199Ssam#include <netipsec/ipsec6.h> 103171167Sgnn#endif /* IPSEC */ 104105199Ssam 10553541Sshin#include <machine/stdarg.h> 10653541Sshin 10753541Sshin#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 10853541Sshin#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 10953541Sshin 11053541Sshin/* 11153541Sshin * Raw interface to IP6 protocol. 11253541Sshin */ 11353541Sshin 11453541Sshinextern struct inpcbhead ripcb; 11553541Sshinextern struct inpcbinfo ripcbinfo; 11653541Sshinextern u_long rip_sendspace; 11753541Sshinextern u_long rip_recvspace; 11853541Sshin 11978064Sumestruct rip6stat rip6stat; 12078064Sume 12153541Sshin/* 122166938Sbms * Hooks for multicast forwarding. 123166938Sbms */ 124166948Sbmsstruct socket *ip6_mrouter = NULL; 125166938Sbmsint (*ip6_mrouter_set)(struct socket *, struct sockopt *); 126166938Sbmsint (*ip6_mrouter_get)(struct socket *, struct sockopt *); 127166938Sbmsint (*ip6_mrouter_done)(void); 128166938Sbmsint (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 129166938Sbmsint (*mrt6_ioctl)(int, caddr_t); 130166938Sbms 131166938Sbms/* 132180305Srwatson * Setup generic address and protocol structures for raw_input routine, then 133180305Srwatson * pass them along with mbuf chain. 13453541Sshin */ 13553541Sshinint 136171259Sdelphijrip6_input(struct mbuf **mp, int *offp, int proto) 13753541Sshin{ 13853541Sshin struct mbuf *m = *mp; 13953541Sshin register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 14053541Sshin register struct inpcb *in6p; 14153541Sshin struct inpcb *last = 0; 14278064Sume struct mbuf *opts = NULL; 143121901Sume struct sockaddr_in6 fromsa; 14453541Sshin 14578064Sume rip6stat.rip6s_ipackets++; 14678064Sume 14783934Sbrooks if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 148180305Srwatson /* XXX Send icmp6 host/port unreach? */ 14978064Sume m_freem(m); 150180305Srwatson return (IPPROTO_DONE); 15153541Sshin } 15278064Sume 153121901Sume init_sin6(&fromsa, m); /* general init */ 15453541Sshin 155132714Srwatson INP_INFO_RLOCK(&ripcbinfo); 15653541Sshin LIST_FOREACH(in6p, &ripcb, inp_list) { 157180850Smav if ((in6p->in6p_vflag & INP_IPV6) == 0) 15853541Sshin continue; 15953541Sshin if (in6p->in6p_ip6_nxt && 16053541Sshin in6p->in6p_ip6_nxt != proto) 161180850Smav continue; 16253541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 16353541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 164180850Smav continue; 16553541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 16653541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 167180850Smav continue; 16878064Sume if (in6p->in6p_cksum != -1) { 16978064Sume rip6stat.rip6s_isum++; 170151459Ssuz if (in6_cksum(m, proto, *offp, 17178064Sume m->m_pkthdr.len - *offp)) { 17278064Sume rip6stat.rip6s_badsum++; 173180850Smav continue; 17478064Sume } 17553541Sshin } 17653541Sshin if (last) { 17753541Sshin struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 17878064Sume 179171167Sgnn#ifdef IPSEC 18078064Sume /* 18178064Sume * Check AH/ESP integrity. 18278064Sume */ 183125396Sume if (n && ipsec6_in_reject(n, last)) { 18478064Sume m_freem(n); 18578064Sume ipsec6stat.in_polvio++; 186180305Srwatson /* Do not inject data into pcb. */ 187105199Ssam } else 188171167Sgnn#endif /* IPSEC */ 18953541Sshin if (n) { 19097658Stanimura if (last->in6p_flags & IN6P_CONTROLOPTS || 19197658Stanimura last->in6p_socket->so_options & SO_TIMESTAMP) 192121674Sume ip6_savecontrol(last, n, &opts); 19353541Sshin /* strip intermediate headers */ 19453541Sshin m_adj(n, *offp); 19553541Sshin if (sbappendaddr(&last->in6p_socket->so_rcv, 196121901Sume (struct sockaddr *)&fromsa, 19753541Sshin n, opts) == 0) { 19853541Sshin m_freem(n); 19953541Sshin if (opts) 20053541Sshin m_freem(opts); 20178064Sume rip6stat.rip6s_fullsock++; 20297658Stanimura } else 20353541Sshin sorwakeup(last->in6p_socket); 20453541Sshin opts = NULL; 20553541Sshin } 206178377Srwatson INP_RUNLOCK(last); 20753541Sshin } 20853541Sshin last = in6p; 209180850Smav INP_RLOCK(last); 21053541Sshin } 211180850Smav INP_INFO_RUNLOCK(&ripcbinfo); 212171167Sgnn#ifdef IPSEC 21378064Sume /* 21478064Sume * Check AH/ESP integrity. 21578064Sume */ 216125396Sume if (last && ipsec6_in_reject(m, last)) { 21778064Sume m_freem(m); 21878064Sume ipsec6stat.in_polvio++; 219105199Ssam ip6stat.ip6s_delivered--; 220180305Srwatson /* Do not inject data into pcb. */ 221178377Srwatson INP_RUNLOCK(last); 222105199Ssam } else 223171167Sgnn#endif /* IPSEC */ 22453541Sshin if (last) { 22597658Stanimura if (last->in6p_flags & IN6P_CONTROLOPTS || 22697658Stanimura last->in6p_socket->so_options & SO_TIMESTAMP) 227121674Sume ip6_savecontrol(last, m, &opts); 228180305Srwatson /* Strip intermediate headers. */ 22953541Sshin m_adj(m, *offp); 23053541Sshin if (sbappendaddr(&last->in6p_socket->so_rcv, 231180305Srwatson (struct sockaddr *)&fromsa, m, opts) == 0) { 23253541Sshin m_freem(m); 23353541Sshin if (opts) 23453541Sshin m_freem(opts); 23578064Sume rip6stat.rip6s_fullsock++; 23697658Stanimura } else 23753541Sshin sorwakeup(last->in6p_socket); 238178377Srwatson INP_RUNLOCK(last); 23953541Sshin } else { 24078064Sume rip6stat.rip6s_nosock++; 24178064Sume if (m->m_flags & M_MCAST) 24278064Sume rip6stat.rip6s_nosockmcast++; 24353541Sshin if (proto == IPPROTO_NONE) 24453541Sshin m_freem(m); 24553541Sshin else { 24653541Sshin char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 24753541Sshin icmp6_error(m, ICMP6_PARAM_PROB, 248180305Srwatson ICMP6_PARAMPROB_NEXTHEADER, 249180305Srwatson prvnxtp - mtod(m, char *)); 25053541Sshin } 25153541Sshin ip6stat.ip6s_delivered--; 25253541Sshin } 253180305Srwatson return (IPPROTO_DONE); 25453541Sshin} 25553541Sshin 25662587Sitojunvoid 257171259Sdelphijrip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 25862587Sitojun{ 25962587Sitojun struct ip6_hdr *ip6; 26062587Sitojun struct mbuf *m; 26162587Sitojun int off = 0; 26278064Sume struct ip6ctlparam *ip6cp = NULL; 26378064Sume const struct sockaddr_in6 *sa6_src = NULL; 264125776Sume void *cmdarg; 265175162Sobrien struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 26662587Sitojun 26762587Sitojun if (sa->sa_family != AF_INET6 || 26862587Sitojun sa->sa_len != sizeof(struct sockaddr_in6)) 26962587Sitojun return; 27062587Sitojun 27162587Sitojun if ((unsigned)cmd >= PRC_NCMDS) 27262587Sitojun return; 27362587Sitojun if (PRC_IS_REDIRECT(cmd)) 27462587Sitojun notify = in6_rtchange, d = NULL; 27562587Sitojun else if (cmd == PRC_HOSTDEAD) 27662587Sitojun d = NULL; 27762587Sitojun else if (inet6ctlerrmap[cmd] == 0) 27862587Sitojun return; 27962587Sitojun 280180305Srwatson /* 281180305Srwatson * If the parameter is from icmp6, decode it. 282180305Srwatson */ 28362587Sitojun if (d != NULL) { 28478064Sume ip6cp = (struct ip6ctlparam *)d; 28562587Sitojun m = ip6cp->ip6c_m; 28662587Sitojun ip6 = ip6cp->ip6c_ip6; 28762587Sitojun off = ip6cp->ip6c_off; 288125776Sume cmdarg = ip6cp->ip6c_cmdarg; 28978064Sume sa6_src = ip6cp->ip6c_src; 29062587Sitojun } else { 29162587Sitojun m = NULL; 29262587Sitojun ip6 = NULL; 293125776Sume cmdarg = NULL; 29478064Sume sa6_src = &sa6_any; 29562587Sitojun } 29662587Sitojun 297133192Srwatson (void) in6_pcbnotify(&ripcbinfo, sa, 0, 298180305Srwatson (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 29962587Sitojun} 30062587Sitojun 30153541Sshin/* 302180305Srwatson * Generate IPv6 header and pass packet to ip6_output. Tack on options user 303180305Srwatson * may have setup with control call. 30453541Sshin */ 30553541Sshinint 30653541Sshin#if __STDC__ 30753541Sshinrip6_output(struct mbuf *m, ...) 30853541Sshin#else 30953541Sshinrip6_output(m, va_alist) 31053541Sshin struct mbuf *m; 31153541Sshin va_dcl 31253541Sshin#endif 31353541Sshin{ 314120941Sume struct mbuf *control; 31553541Sshin struct socket *so; 31653541Sshin struct sockaddr_in6 *dstsock; 31753541Sshin struct in6_addr *dst; 31853541Sshin struct ip6_hdr *ip6; 31953541Sshin struct inpcb *in6p; 32053541Sshin u_int plen = m->m_pkthdr.len; 32153541Sshin int error = 0; 322148247Sume struct ip6_pktopts opt, *optp; 32353541Sshin struct ifnet *oifp = NULL; 32453541Sshin int type = 0, code = 0; /* for ICMPv6 output statistics only */ 325148385Sume int scope_ambiguous = 0; 326121472Sume struct in6_addr *in6a; 32753541Sshin va_list ap; 32853541Sshin 32953541Sshin va_start(ap, m); 33053541Sshin so = va_arg(ap, struct socket *); 33153541Sshin dstsock = va_arg(ap, struct sockaddr_in6 *); 33253541Sshin control = va_arg(ap, struct mbuf *); 33353541Sshin va_end(ap); 33453541Sshin 33553541Sshin in6p = sotoin6pcb(so); 336178285Srwatson INP_WLOCK(in6p); 33753541Sshin 33853541Sshin dst = &dstsock->sin6_addr; 33953541Sshin if (control) { 340148242Sume if ((error = ip6_setpktopts(control, &opt, 341175630Sbz in6p->in6p_outputopts, so->so_cred, 342175630Sbz so->so_proto->pr_protocol)) != 0) { 34353541Sshin goto bad; 344121472Sume } 345148247Sume optp = &opt; 346148247Sume } else 347148247Sume optp = in6p->in6p_outputopts; 34853541Sshin 34953541Sshin /* 350148385Sume * Check and convert scope zone ID into internal form. 351180305Srwatson * 352148385Sume * XXX: we may still need to determine the zone later. 353148385Sume */ 354148385Sume if (!(so->so_state & SS_ISCONNECTED)) { 355148385Sume if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 356148385Sume scope_ambiguous = 1; 357148385Sume if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 358148385Sume goto bad; 359148385Sume } 360148385Sume 361148385Sume /* 362180305Srwatson * For an ICMPv6 packet, we should know its type and code to update 363180305Srwatson * statistics. 36453541Sshin */ 36553541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 36653541Sshin struct icmp6_hdr *icmp6; 36753541Sshin if (m->m_len < sizeof(struct icmp6_hdr) && 36853541Sshin (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 36953541Sshin error = ENOBUFS; 37053541Sshin goto bad; 37153541Sshin } 37253541Sshin icmp6 = mtod(m, struct icmp6_hdr *); 37353541Sshin type = icmp6->icmp6_type; 37453541Sshin code = icmp6->icmp6_code; 37553541Sshin } 37653541Sshin 377133592Srwatson M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 378133592Srwatson if (m == NULL) { 379133592Srwatson error = ENOBUFS; 380133592Srwatson goto bad; 381133592Srwatson } 38253541Sshin ip6 = mtod(m, struct ip6_hdr *); 38353541Sshin 38453541Sshin /* 38553541Sshin * Source address selection. 38653541Sshin */ 387180371Sbz if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 388180371Sbz &oifp, &error)) == NULL) { 389121472Sume if (error == 0) 390121472Sume error = EADDRNOTAVAIL; 391121472Sume goto bad; 39253541Sshin } 393121472Sume ip6->ip6_src = *in6a; 394148385Sume 395148385Sume if (oifp && scope_ambiguous) { 396148385Sume /* 397148385Sume * Application should provide a proper zone ID or the use of 398148385Sume * default zone IDs should be enabled. Unfortunately, some 399148385Sume * applications do not behave as it should, so we need a 400148385Sume * workaround. Even if an appropriate ID is not determined 401148385Sume * (when it's required), if we can determine the outgoing 402148385Sume * interface. determine the zone ID based on the interface. 403148385Sume */ 404148385Sume error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 405148385Sume if (error != 0) 406148385Sume goto bad; 407148385Sume } 408148385Sume ip6->ip6_dst = dstsock->sin6_addr; 409148385Sume 410180305Srwatson /* 411180305Srwatson * Fill in the rest of the IPv6 header fields. 412180305Srwatson */ 41355009Sshin ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 414180305Srwatson (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 41555009Sshin ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 416180305Srwatson (IPV6_VERSION & IPV6_VERSION_MASK); 417180305Srwatson 418180305Srwatson /* 419180305Srwatson * ip6_plen will be filled in ip6_output, so not fill it here. 420180305Srwatson */ 42153541Sshin ip6->ip6_nxt = in6p->in6p_ip6_nxt; 42253541Sshin ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 42353541Sshin 42453541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 42553541Sshin in6p->in6p_cksum != -1) { 42653541Sshin struct mbuf *n; 42753541Sshin int off; 42853541Sshin u_int16_t *p; 42953541Sshin 430180305Srwatson /* Compute checksum. */ 43153541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 43253541Sshin off = offsetof(struct icmp6_hdr, icmp6_cksum); 43353541Sshin else 43453541Sshin off = in6p->in6p_cksum; 43553541Sshin if (plen < off + 1) { 43653541Sshin error = EINVAL; 43753541Sshin goto bad; 43853541Sshin } 43953541Sshin off += sizeof(struct ip6_hdr); 44053541Sshin 44153541Sshin n = m; 44253541Sshin while (n && n->m_len <= off) { 44353541Sshin off -= n->m_len; 44453541Sshin n = n->m_next; 44553541Sshin } 44653541Sshin if (!n) 44753541Sshin goto bad; 44853541Sshin p = (u_int16_t *)(mtod(n, caddr_t) + off); 44953541Sshin *p = 0; 45053541Sshin *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 45153541Sshin } 45253541Sshin 453148247Sume error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 45453541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 45553541Sshin if (oifp) 45653541Sshin icmp6_ifoutstat_inc(oifp, type, code); 45753541Sshin icmp6stat.icp6s_outhist[type]++; 45878064Sume } else 45978064Sume rip6stat.rip6s_opackets++; 46053541Sshin 46153541Sshin goto freectl; 46253541Sshin 46353541Sshin bad: 46453541Sshin if (m) 46553541Sshin m_freem(m); 46653541Sshin 46753541Sshin freectl: 46878064Sume if (control) { 469148247Sume ip6_clearpktopts(&opt, -1); 47053541Sshin m_freem(control); 47178064Sume } 472178285Srwatson INP_WUNLOCK(in6p); 473120856Sume return (error); 47453541Sshin} 47553541Sshin 47653541Sshin/* 47753541Sshin * Raw IPv6 socket option processing. 47853541Sshin */ 47953541Sshinint 480171259Sdelphijrip6_ctloutput(struct socket *so, struct sockopt *sopt) 48153541Sshin{ 48253541Sshin int error; 48353541Sshin 48453541Sshin if (sopt->sopt_level == IPPROTO_ICMPV6) 48553541Sshin /* 48653541Sshin * XXX: is it better to call icmp6_ctloutput() directly 48753541Sshin * from protosw? 48853541Sshin */ 489120856Sume return (icmp6_ctloutput(so, sopt)); 49053541Sshin else if (sopt->sopt_level != IPPROTO_IPV6) 49153541Sshin return (EINVAL); 49253541Sshin 49353541Sshin error = 0; 49453541Sshin 49553541Sshin switch (sopt->sopt_dir) { 49653541Sshin case SOPT_GET: 49753541Sshin switch (sopt->sopt_name) { 49856723Sshin case MRT6_INIT: 49956723Sshin case MRT6_DONE: 50056723Sshin case MRT6_ADD_MIF: 50156723Sshin case MRT6_DEL_MIF: 50256723Sshin case MRT6_ADD_MFC: 50356723Sshin case MRT6_DEL_MFC: 50456723Sshin case MRT6_PIM: 505166938Sbms error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 506166938Sbms EOPNOTSUPP; 50756723Sshin break; 508121578Sume case IPV6_CHECKSUM: 509121578Sume error = ip6_raw_ctloutput(so, sopt); 510121578Sume break; 51153541Sshin default: 51253541Sshin error = ip6_ctloutput(so, sopt); 51353541Sshin break; 51453541Sshin } 51553541Sshin break; 51653541Sshin 51753541Sshin case SOPT_SET: 51853541Sshin switch (sopt->sopt_name) { 51956723Sshin case MRT6_INIT: 52056723Sshin case MRT6_DONE: 52156723Sshin case MRT6_ADD_MIF: 52256723Sshin case MRT6_DEL_MIF: 52356723Sshin case MRT6_ADD_MFC: 52456723Sshin case MRT6_DEL_MFC: 52556723Sshin case MRT6_PIM: 526166938Sbms error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 527166938Sbms EOPNOTSUPP; 52856723Sshin break; 529121578Sume case IPV6_CHECKSUM: 530121578Sume error = ip6_raw_ctloutput(so, sopt); 531121578Sume break; 53253541Sshin default: 53353541Sshin error = ip6_ctloutput(so, sopt); 53453541Sshin break; 53553541Sshin } 53653541Sshin break; 53753541Sshin } 53853541Sshin 53953541Sshin return (error); 54053541Sshin} 54153541Sshin 54253541Sshinstatic int 54383366Sjulianrip6_attach(struct socket *so, int proto, struct thread *td) 54453541Sshin{ 54553541Sshin struct inpcb *inp; 546144261Ssam struct icmp6_filter *filter; 547157676Srwatson int error; 54853541Sshin 54953541Sshin inp = sotoinpcb(so); 550157374Srwatson KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 551180305Srwatson 552175630Sbz error = priv_check(td, PRIV_NETINET_RAW); 553175630Sbz if (error) 554180305Srwatson return (error); 55555009Sshin error = soreserve(so, rip_sendspace, rip_recvspace); 556157374Srwatson if (error) 557180305Srwatson return (error); 558144261Ssam MALLOC(filter, struct icmp6_filter *, 559144261Ssam sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 560157374Srwatson if (filter == NULL) 561180305Srwatson return (ENOMEM); 562157374Srwatson INP_INFO_WLOCK(&ripcbinfo); 563160491Sups error = in_pcballoc(so, &ripcbinfo); 564132714Srwatson if (error) { 565132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 566144261Ssam FREE(filter, M_PCB); 567180305Srwatson return (error); 568132714Srwatson } 56953541Sshin inp = (struct inpcb *)so->so_pcb; 570132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 57153541Sshin inp->inp_vflag |= INP_IPV6; 57253541Sshin inp->in6p_ip6_nxt = (long)proto; 57353541Sshin inp->in6p_hops = -1; /* use kernel default */ 57453541Sshin inp->in6p_cksum = -1; 575144261Ssam inp->in6p_icmp6filt = filter; 57653541Sshin ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 577178285Srwatson INP_WUNLOCK(inp); 578180305Srwatson return (0); 57953541Sshin} 58053541Sshin 581157370Srwatsonstatic void 58253541Sshinrip6_detach(struct socket *so) 58353541Sshin{ 58453541Sshin struct inpcb *inp; 58553541Sshin 58653541Sshin inp = sotoinpcb(so); 587157374Srwatson KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 588160549Srwatson 589166938Sbms if (so == ip6_mrouter && ip6_mrouter_done) 590166938Sbms ip6_mrouter_done(); 59153541Sshin /* xxx: RSVP */ 592160549Srwatson INP_INFO_WLOCK(&ripcbinfo); 593178285Srwatson INP_WLOCK(inp); 59453541Sshin if (inp->in6p_icmp6filt) { 59553541Sshin FREE(inp->in6p_icmp6filt, M_PCB); 59653541Sshin inp->in6p_icmp6filt = NULL; 59753541Sshin } 59853541Sshin in6_pcbdetach(inp); 599157374Srwatson in6_pcbfree(inp); 600132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 60153541Sshin} 60253541Sshin 603160549Srwatson/* XXXRW: This can't ever be called. */ 604157366Srwatsonstatic void 60553541Sshinrip6_abort(struct socket *so) 60653541Sshin{ 607160549Srwatson struct inpcb *inp; 608160549Srwatson 609160549Srwatson inp = sotoinpcb(so); 610160549Srwatson KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 611160549Srwatson 61253541Sshin soisdisconnected(so); 61353541Sshin} 61453541Sshin 615160549Srwatsonstatic void 616160549Srwatsonrip6_close(struct socket *so) 617160549Srwatson{ 618160549Srwatson struct inpcb *inp; 619160549Srwatson 620160549Srwatson inp = sotoinpcb(so); 621160549Srwatson KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 622160549Srwatson 623160549Srwatson soisdisconnected(so); 624160549Srwatson} 625160549Srwatson 62653541Sshinstatic int 62753541Sshinrip6_disconnect(struct socket *so) 62853541Sshin{ 629180305Srwatson struct inpcb *inp; 63053541Sshin 631180305Srwatson inp = sotoinpcb(so); 632180305Srwatson KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 633180305Srwatson 63497658Stanimura if ((so->so_state & SS_ISCONNECTED) == 0) 635180305Srwatson return (ENOTCONN); 63653541Sshin inp->in6p_faddr = in6addr_any; 637157366Srwatson rip6_abort(so); 638157374Srwatson return (0); 63953541Sshin} 64053541Sshin 64153541Sshinstatic int 64283366Sjulianrip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 64353541Sshin{ 644180305Srwatson struct inpcb *inp; 64553541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 64653541Sshin struct ifaddr *ia = NULL; 647148385Sume int error = 0; 64853541Sshin 649180305Srwatson inp = sotoinpcb(so); 650157374Srwatson KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 651180305Srwatson 65253541Sshin if (nam->sa_len != sizeof(*addr)) 653180305Srwatson return (EINVAL); 65453541Sshin if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 655180305Srwatson return (EADDRNOTAVAIL); 656148385Sume if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 657180305Srwatson return (error); 658148385Sume 65953541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 66053541Sshin (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 661180305Srwatson return (EADDRNOTAVAIL); 66253541Sshin if (ia && 66353541Sshin ((struct in6_ifaddr *)ia)->ia6_flags & 66453541Sshin (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 66553541Sshin IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 666120856Sume return (EADDRNOTAVAIL); 66753541Sshin } 668132714Srwatson INP_INFO_WLOCK(&ripcbinfo); 669178285Srwatson INP_WLOCK(inp); 67053541Sshin inp->in6p_laddr = addr->sin6_addr; 671178285Srwatson INP_WUNLOCK(inp); 672132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 673180305Srwatson return (0); 67453541Sshin} 67553541Sshin 67653541Sshinstatic int 67783366Sjulianrip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 67853541Sshin{ 679180305Srwatson struct inpcb *inp; 68053541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 68153541Sshin struct in6_addr *in6a = NULL; 682148385Sume struct ifnet *ifp = NULL; 683148385Sume int error = 0, scope_ambiguous = 0; 68453541Sshin 685180305Srwatson inp = sotoinpcb(so); 686157374Srwatson KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 687180305Srwatson 68853541Sshin if (nam->sa_len != sizeof(*addr)) 689180305Srwatson return (EINVAL); 69053541Sshin if (TAILQ_EMPTY(&ifnet)) 691180305Srwatson return (EADDRNOTAVAIL); 69253541Sshin if (addr->sin6_family != AF_INET6) 693180305Srwatson return (EAFNOSUPPORT); 694148385Sume 695148385Sume /* 696180305Srwatson * Application should provide a proper zone ID or the use of default 697180305Srwatson * zone IDs should be enabled. Unfortunately, some applications do 698180305Srwatson * not behave as it should, so we need a workaround. Even if an 699180305Srwatson * appropriate ID is not determined, we'll see if we can determine 700180305Srwatson * the outgoing interface. If we can, determine the zone ID based on 701180305Srwatson * the interface below. 702148385Sume */ 703148385Sume if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 704148385Sume scope_ambiguous = 1; 705148385Sume if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 706180305Srwatson return (error); 707148385Sume 708132714Srwatson INP_INFO_WLOCK(&ripcbinfo); 709178285Srwatson INP_WLOCK(inp); 71053541Sshin /* Source address selection. XXX: need pcblookup? */ 71153541Sshin in6a = in6_selectsrc(addr, inp->in6p_outputopts, 712180371Sbz inp, NULL, so->so_cred, 713180371Sbz &ifp, &error); 714132714Srwatson if (in6a == NULL) { 715178285Srwatson INP_WUNLOCK(inp); 716132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 71753541Sshin return (error ? error : EADDRNOTAVAIL); 718132714Srwatson } 719148385Sume 720148385Sume /* XXX: see above */ 721148385Sume if (ifp && scope_ambiguous && 722148385Sume (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 723178285Srwatson INP_WUNLOCK(inp); 724148385Sume INP_INFO_WUNLOCK(&ripcbinfo); 725180305Srwatson return (error); 726148385Sume } 727148385Sume inp->in6p_faddr = addr->sin6_addr; 72853541Sshin inp->in6p_laddr = *in6a; 72953541Sshin soisconnected(so); 730178285Srwatson INP_WUNLOCK(inp); 731132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 732180305Srwatson return (0); 73353541Sshin} 73453541Sshin 73553541Sshinstatic int 73653541Sshinrip6_shutdown(struct socket *so) 73753541Sshin{ 738132714Srwatson struct inpcb *inp; 739132714Srwatson 740132714Srwatson inp = sotoinpcb(so); 741157374Srwatson KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 742180305Srwatson 743178285Srwatson INP_WLOCK(inp); 74453541Sshin socantsendmore(so); 745178285Srwatson INP_WUNLOCK(inp); 746180305Srwatson return (0); 74753541Sshin} 74853541Sshin 74953541Sshinstatic int 75053541Sshinrip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 751171260Sdelphij struct mbuf *control, struct thread *td) 75253541Sshin{ 753180305Srwatson struct inpcb *inp; 75453541Sshin struct sockaddr_in6 tmp; 75553541Sshin struct sockaddr_in6 *dst; 756132714Srwatson int ret; 75753541Sshin 758180305Srwatson inp = sotoinpcb(so); 759157374Srwatson KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 760180305Srwatson 761132714Srwatson INP_INFO_WLOCK(&ripcbinfo); 762180305Srwatson /* Always copy sockaddr to avoid overwrites. */ 763132714Srwatson /* Unlocked read. */ 76453541Sshin if (so->so_state & SS_ISCONNECTED) { 76553541Sshin if (nam) { 766132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 76753541Sshin m_freem(m); 768180305Srwatson return (EISCONN); 76953541Sshin } 77053541Sshin /* XXX */ 77153541Sshin bzero(&tmp, sizeof(tmp)); 77253541Sshin tmp.sin6_family = AF_INET6; 77353541Sshin tmp.sin6_len = sizeof(struct sockaddr_in6); 77453541Sshin bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 77553541Sshin sizeof(struct in6_addr)); 77653541Sshin dst = &tmp; 77753541Sshin } else { 77853541Sshin if (nam == NULL) { 779132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 78053541Sshin m_freem(m); 781180305Srwatson return (ENOTCONN); 78253541Sshin } 783148385Sume if (nam->sa_len != sizeof(struct sockaddr_in6)) { 784148385Sume INP_INFO_WUNLOCK(&ripcbinfo); 785148385Sume m_freem(m); 786180305Srwatson return (EINVAL); 787148385Sume } 78862587Sitojun tmp = *(struct sockaddr_in6 *)nam; 78962587Sitojun dst = &tmp; 790148385Sume 791148385Sume if (dst->sin6_family == AF_UNSPEC) { 792148385Sume /* 793148385Sume * XXX: we allow this case for backward 794148385Sume * compatibility to buggy applications that 795148385Sume * rely on old (and wrong) kernel behavior. 796148385Sume */ 797148385Sume log(LOG_INFO, "rip6 SEND: address family is " 798148385Sume "unspec. Assume AF_INET6\n"); 799148385Sume dst->sin6_family = AF_INET6; 800148385Sume } else if (dst->sin6_family != AF_INET6) { 801148385Sume INP_INFO_WUNLOCK(&ripcbinfo); 802148385Sume m_freem(m); 803148385Sume return(EAFNOSUPPORT); 804148385Sume } 80553541Sshin } 806132714Srwatson ret = rip6_output(m, so, dst, control); 807132714Srwatson INP_INFO_WUNLOCK(&ripcbinfo); 808132714Srwatson return (ret); 80953541Sshin} 81053541Sshin 81153541Sshinstruct pr_usrreqs rip6_usrreqs = { 812137386Sphk .pru_abort = rip6_abort, 813137386Sphk .pru_attach = rip6_attach, 814137386Sphk .pru_bind = rip6_bind, 815137386Sphk .pru_connect = rip6_connect, 816137386Sphk .pru_control = in6_control, 817137386Sphk .pru_detach = rip6_detach, 818137386Sphk .pru_disconnect = rip6_disconnect, 819169462Srwatson .pru_peeraddr = in6_getpeeraddr, 820137386Sphk .pru_send = rip6_send, 821137386Sphk .pru_shutdown = rip6_shutdown, 822169462Srwatson .pru_sockaddr = in6_getsockaddr, 823160549Srwatson .pru_close = rip6_close, 82453541Sshin}; 825