raw_ip6.c revision 184214
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 184214 2008-10-23 20:26:15Z des $"); 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> 81181803Sbz#include <sys/vimage.h> 8253541Sshin 8353541Sshin#include <net/if.h> 8495759Stanimura#include <net/if_types.h> 8553541Sshin#include <net/route.h> 8653541Sshin 8753541Sshin#include <netinet/in.h> 8853541Sshin#include <netinet/in_var.h> 8953541Sshin#include <netinet/in_systm.h> 9095759Stanimura#include <netinet/icmp6.h> 9195759Stanimura#include <netinet/in_pcb.h> 9262587Sitojun#include <netinet/ip6.h> 9395759Stanimura#include <netinet6/ip6protosw.h> 9456723Sshin#include <netinet6/ip6_mroute.h> 9553541Sshin#include <netinet6/in6_pcb.h> 9695759Stanimura#include <netinet6/ip6_var.h> 9753541Sshin#include <netinet6/nd6.h> 9895759Stanimura#include <netinet6/raw_ip6.h> 9962587Sitojun#include <netinet6/scope6_var.h> 10053541Sshin 101171167Sgnn#ifdef IPSEC 102105199Ssam#include <netipsec/ipsec.h> 103105199Ssam#include <netipsec/ipsec6.h> 104171167Sgnn#endif /* IPSEC */ 105105199Ssam 10653541Sshin#include <machine/stdarg.h> 10753541Sshin 10853541Sshin#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 10953541Sshin#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 11053541Sshin 11153541Sshin/* 11253541Sshin * Raw interface to IP6 protocol. 11353541Sshin */ 11453541Sshin 11553541Sshinextern struct inpcbhead ripcb; 11653541Sshinextern struct inpcbinfo ripcbinfo; 11753541Sshinextern u_long rip_sendspace; 11853541Sshinextern u_long rip_recvspace; 11953541Sshin 12078064Sumestruct rip6stat rip6stat; 12178064Sume 12253541Sshin/* 123166938Sbms * Hooks for multicast forwarding. 124166938Sbms */ 125166948Sbmsstruct socket *ip6_mrouter = NULL; 126166938Sbmsint (*ip6_mrouter_set)(struct socket *, struct sockopt *); 127166938Sbmsint (*ip6_mrouter_get)(struct socket *, struct sockopt *); 128166938Sbmsint (*ip6_mrouter_done)(void); 129166938Sbmsint (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 130166938Sbmsint (*mrt6_ioctl)(int, caddr_t); 131166938Sbms 132166938Sbms/* 133180305Srwatson * Setup generic address and protocol structures for raw_input routine, then 134180305Srwatson * pass them along with mbuf chain. 13553541Sshin */ 13653541Sshinint 137171259Sdelphijrip6_input(struct mbuf **mp, int *offp, int proto) 13853541Sshin{ 139183550Szec INIT_VNET_INET(curvnet); 140183550Szec INIT_VNET_INET6(curvnet); 141183550Szec#ifdef IPSEC 142183550Szec INIT_VNET_IPSEC(curvnet); 143183550Szec#endif 14453541Sshin struct mbuf *m = *mp; 14553541Sshin register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 14653541Sshin register struct inpcb *in6p; 14753541Sshin struct inpcb *last = 0; 14878064Sume struct mbuf *opts = NULL; 149121901Sume struct sockaddr_in6 fromsa; 15053541Sshin 151181803Sbz V_rip6stat.rip6s_ipackets++; 15278064Sume 15383934Sbrooks if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 154180305Srwatson /* XXX Send icmp6 host/port unreach? */ 15578064Sume m_freem(m); 156180305Srwatson return (IPPROTO_DONE); 15753541Sshin } 15878064Sume 159121901Sume init_sin6(&fromsa, m); /* general init */ 16053541Sshin 161181803Sbz INP_INFO_RLOCK(&V_ripcbinfo); 162181803Sbz LIST_FOREACH(in6p, &V_ripcb, inp_list) { 163180850Smav if ((in6p->in6p_vflag & INP_IPV6) == 0) 16453541Sshin continue; 16553541Sshin if (in6p->in6p_ip6_nxt && 16653541Sshin in6p->in6p_ip6_nxt != proto) 167180850Smav continue; 16853541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 16953541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 170180850Smav continue; 17153541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 17253541Sshin !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 173180850Smav continue; 174180932Smav INP_RLOCK(in6p); 17578064Sume if (in6p->in6p_cksum != -1) { 176181803Sbz V_rip6stat.rip6s_isum++; 177151459Ssuz if (in6_cksum(m, proto, *offp, 17878064Sume m->m_pkthdr.len - *offp)) { 179180932Smav INP_RUNLOCK(in6p); 180181803Sbz V_rip6stat.rip6s_badsum++; 181180850Smav continue; 18278064Sume } 18353541Sshin } 18453541Sshin if (last) { 18553541Sshin struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 18678064Sume 187171167Sgnn#ifdef IPSEC 18878064Sume /* 18978064Sume * Check AH/ESP integrity. 19078064Sume */ 191125396Sume if (n && ipsec6_in_reject(n, last)) { 19278064Sume m_freem(n); 193181803Sbz V_ipsec6stat.in_polvio++; 194180305Srwatson /* Do not inject data into pcb. */ 195105199Ssam } else 196171167Sgnn#endif /* IPSEC */ 19753541Sshin if (n) { 19897658Stanimura if (last->in6p_flags & IN6P_CONTROLOPTS || 19997658Stanimura last->in6p_socket->so_options & SO_TIMESTAMP) 200121674Sume ip6_savecontrol(last, n, &opts); 20153541Sshin /* strip intermediate headers */ 20253541Sshin m_adj(n, *offp); 20353541Sshin if (sbappendaddr(&last->in6p_socket->so_rcv, 204121901Sume (struct sockaddr *)&fromsa, 20553541Sshin n, opts) == 0) { 20653541Sshin m_freem(n); 20753541Sshin if (opts) 20853541Sshin m_freem(opts); 209181803Sbz V_rip6stat.rip6s_fullsock++; 21097658Stanimura } else 21153541Sshin sorwakeup(last->in6p_socket); 21253541Sshin opts = NULL; 21353541Sshin } 214178377Srwatson INP_RUNLOCK(last); 21553541Sshin } 21653541Sshin last = in6p; 21753541Sshin } 218181803Sbz INP_INFO_RUNLOCK(&V_ripcbinfo); 219171167Sgnn#ifdef IPSEC 22078064Sume /* 22178064Sume * Check AH/ESP integrity. 22278064Sume */ 223125396Sume if (last && ipsec6_in_reject(m, last)) { 22478064Sume m_freem(m); 225181803Sbz V_ipsec6stat.in_polvio++; 226181803Sbz V_ip6stat.ip6s_delivered--; 227180305Srwatson /* Do not inject data into pcb. */ 228178377Srwatson INP_RUNLOCK(last); 229105199Ssam } else 230171167Sgnn#endif /* IPSEC */ 23153541Sshin if (last) { 23297658Stanimura if (last->in6p_flags & IN6P_CONTROLOPTS || 23397658Stanimura last->in6p_socket->so_options & SO_TIMESTAMP) 234121674Sume ip6_savecontrol(last, m, &opts); 235180305Srwatson /* Strip intermediate headers. */ 23653541Sshin m_adj(m, *offp); 23753541Sshin if (sbappendaddr(&last->in6p_socket->so_rcv, 238180305Srwatson (struct sockaddr *)&fromsa, m, opts) == 0) { 23953541Sshin m_freem(m); 24053541Sshin if (opts) 24153541Sshin m_freem(opts); 242181803Sbz V_rip6stat.rip6s_fullsock++; 24397658Stanimura } else 24453541Sshin sorwakeup(last->in6p_socket); 245178377Srwatson INP_RUNLOCK(last); 24653541Sshin } else { 247181803Sbz V_rip6stat.rip6s_nosock++; 24878064Sume if (m->m_flags & M_MCAST) 249181803Sbz V_rip6stat.rip6s_nosockmcast++; 25053541Sshin if (proto == IPPROTO_NONE) 25153541Sshin m_freem(m); 25253541Sshin else { 25353541Sshin char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 25453541Sshin icmp6_error(m, ICMP6_PARAM_PROB, 255180305Srwatson ICMP6_PARAMPROB_NEXTHEADER, 256180305Srwatson prvnxtp - mtod(m, char *)); 25753541Sshin } 258181803Sbz V_ip6stat.ip6s_delivered--; 25953541Sshin } 260180305Srwatson return (IPPROTO_DONE); 26153541Sshin} 26253541Sshin 26362587Sitojunvoid 264171259Sdelphijrip6_ctlinput(int cmd, struct sockaddr *sa, void *d) 26562587Sitojun{ 266183550Szec INIT_VNET_INET(curvnet); 26762587Sitojun struct ip6_hdr *ip6; 26862587Sitojun struct mbuf *m; 26962587Sitojun int off = 0; 27078064Sume struct ip6ctlparam *ip6cp = NULL; 27178064Sume const struct sockaddr_in6 *sa6_src = NULL; 272125776Sume void *cmdarg; 273175162Sobrien struct inpcb *(*notify)(struct inpcb *, int) = in6_rtchange; 27462587Sitojun 27562587Sitojun if (sa->sa_family != AF_INET6 || 27662587Sitojun sa->sa_len != sizeof(struct sockaddr_in6)) 27762587Sitojun return; 27862587Sitojun 27962587Sitojun if ((unsigned)cmd >= PRC_NCMDS) 28062587Sitojun return; 28162587Sitojun if (PRC_IS_REDIRECT(cmd)) 28262587Sitojun notify = in6_rtchange, d = NULL; 28362587Sitojun else if (cmd == PRC_HOSTDEAD) 28462587Sitojun d = NULL; 28562587Sitojun else if (inet6ctlerrmap[cmd] == 0) 28662587Sitojun return; 28762587Sitojun 288180305Srwatson /* 289180305Srwatson * If the parameter is from icmp6, decode it. 290180305Srwatson */ 29162587Sitojun if (d != NULL) { 29278064Sume ip6cp = (struct ip6ctlparam *)d; 29362587Sitojun m = ip6cp->ip6c_m; 29462587Sitojun ip6 = ip6cp->ip6c_ip6; 29562587Sitojun off = ip6cp->ip6c_off; 296125776Sume cmdarg = ip6cp->ip6c_cmdarg; 29778064Sume sa6_src = ip6cp->ip6c_src; 29862587Sitojun } else { 29962587Sitojun m = NULL; 30062587Sitojun ip6 = NULL; 301125776Sume cmdarg = NULL; 30278064Sume sa6_src = &sa6_any; 30362587Sitojun } 30462587Sitojun 305181803Sbz (void) in6_pcbnotify(&V_ripcbinfo, sa, 0, 306180305Srwatson (const struct sockaddr *)sa6_src, 0, cmd, cmdarg, notify); 30762587Sitojun} 30862587Sitojun 30953541Sshin/* 310180305Srwatson * Generate IPv6 header and pass packet to ip6_output. Tack on options user 311180305Srwatson * may have setup with control call. 31253541Sshin */ 31353541Sshinint 31453541Sshin#if __STDC__ 31553541Sshinrip6_output(struct mbuf *m, ...) 31653541Sshin#else 31753541Sshinrip6_output(m, va_alist) 31853541Sshin struct mbuf *m; 31953541Sshin va_dcl 32053541Sshin#endif 32153541Sshin{ 322183550Szec INIT_VNET_INET6(curvnet); 323120941Sume struct mbuf *control; 32453541Sshin struct socket *so; 32553541Sshin struct sockaddr_in6 *dstsock; 32653541Sshin struct in6_addr *dst; 32753541Sshin struct ip6_hdr *ip6; 32853541Sshin struct inpcb *in6p; 32953541Sshin u_int plen = m->m_pkthdr.len; 33053541Sshin int error = 0; 331148247Sume struct ip6_pktopts opt, *optp; 33253541Sshin struct ifnet *oifp = NULL; 33353541Sshin int type = 0, code = 0; /* for ICMPv6 output statistics only */ 334148385Sume int scope_ambiguous = 0; 335121472Sume struct in6_addr *in6a; 33653541Sshin va_list ap; 33753541Sshin 33853541Sshin va_start(ap, m); 33953541Sshin so = va_arg(ap, struct socket *); 34053541Sshin dstsock = va_arg(ap, struct sockaddr_in6 *); 34153541Sshin control = va_arg(ap, struct mbuf *); 34253541Sshin va_end(ap); 34353541Sshin 34453541Sshin in6p = sotoin6pcb(so); 345178285Srwatson INP_WLOCK(in6p); 34653541Sshin 34753541Sshin dst = &dstsock->sin6_addr; 34853541Sshin if (control) { 349148242Sume if ((error = ip6_setpktopts(control, &opt, 350175630Sbz in6p->in6p_outputopts, so->so_cred, 351175630Sbz so->so_proto->pr_protocol)) != 0) { 35253541Sshin goto bad; 353121472Sume } 354148247Sume optp = &opt; 355148247Sume } else 356148247Sume optp = in6p->in6p_outputopts; 35753541Sshin 35853541Sshin /* 359148385Sume * Check and convert scope zone ID into internal form. 360180305Srwatson * 361148385Sume * XXX: we may still need to determine the zone later. 362148385Sume */ 363148385Sume if (!(so->so_state & SS_ISCONNECTED)) { 364181803Sbz if (dstsock->sin6_scope_id == 0 && !V_ip6_use_defzone) 365148385Sume scope_ambiguous = 1; 366181803Sbz if ((error = sa6_embedscope(dstsock, V_ip6_use_defzone)) != 0) 367148385Sume goto bad; 368148385Sume } 369148385Sume 370148385Sume /* 371180305Srwatson * For an ICMPv6 packet, we should know its type and code to update 372180305Srwatson * statistics. 37353541Sshin */ 37453541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 37553541Sshin struct icmp6_hdr *icmp6; 37653541Sshin if (m->m_len < sizeof(struct icmp6_hdr) && 37753541Sshin (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 37853541Sshin error = ENOBUFS; 37953541Sshin goto bad; 38053541Sshin } 38153541Sshin icmp6 = mtod(m, struct icmp6_hdr *); 38253541Sshin type = icmp6->icmp6_type; 38353541Sshin code = icmp6->icmp6_code; 38453541Sshin } 38553541Sshin 386133592Srwatson M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 387133592Srwatson if (m == NULL) { 388133592Srwatson error = ENOBUFS; 389133592Srwatson goto bad; 390133592Srwatson } 39153541Sshin ip6 = mtod(m, struct ip6_hdr *); 39253541Sshin 39353541Sshin /* 39453541Sshin * Source address selection. 39553541Sshin */ 396180371Sbz if ((in6a = in6_selectsrc(dstsock, optp, in6p, NULL, so->so_cred, 397180371Sbz &oifp, &error)) == NULL) { 398121472Sume if (error == 0) 399121472Sume error = EADDRNOTAVAIL; 400121472Sume goto bad; 40153541Sshin } 402121472Sume ip6->ip6_src = *in6a; 403148385Sume 404148385Sume if (oifp && scope_ambiguous) { 405148385Sume /* 406148385Sume * Application should provide a proper zone ID or the use of 407148385Sume * default zone IDs should be enabled. Unfortunately, some 408148385Sume * applications do not behave as it should, so we need a 409148385Sume * workaround. Even if an appropriate ID is not determined 410148385Sume * (when it's required), if we can determine the outgoing 411148385Sume * interface. determine the zone ID based on the interface. 412148385Sume */ 413148385Sume error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 414148385Sume if (error != 0) 415148385Sume goto bad; 416148385Sume } 417148385Sume ip6->ip6_dst = dstsock->sin6_addr; 418148385Sume 419180305Srwatson /* 420180305Srwatson * Fill in the rest of the IPv6 header fields. 421180305Srwatson */ 42255009Sshin ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 423180305Srwatson (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 42455009Sshin ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 425180305Srwatson (IPV6_VERSION & IPV6_VERSION_MASK); 426180305Srwatson 427180305Srwatson /* 428180305Srwatson * ip6_plen will be filled in ip6_output, so not fill it here. 429180305Srwatson */ 43053541Sshin ip6->ip6_nxt = in6p->in6p_ip6_nxt; 43153541Sshin ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 43253541Sshin 43353541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 43453541Sshin in6p->in6p_cksum != -1) { 43553541Sshin struct mbuf *n; 43653541Sshin int off; 43753541Sshin u_int16_t *p; 43853541Sshin 439180305Srwatson /* Compute checksum. */ 44053541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 44153541Sshin off = offsetof(struct icmp6_hdr, icmp6_cksum); 44253541Sshin else 44353541Sshin off = in6p->in6p_cksum; 44453541Sshin if (plen < off + 1) { 44553541Sshin error = EINVAL; 44653541Sshin goto bad; 44753541Sshin } 44853541Sshin off += sizeof(struct ip6_hdr); 44953541Sshin 45053541Sshin n = m; 45153541Sshin while (n && n->m_len <= off) { 45253541Sshin off -= n->m_len; 45353541Sshin n = n->m_next; 45453541Sshin } 45553541Sshin if (!n) 45653541Sshin goto bad; 45753541Sshin p = (u_int16_t *)(mtod(n, caddr_t) + off); 45853541Sshin *p = 0; 45953541Sshin *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 46053541Sshin } 46153541Sshin 462148247Sume error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 46353541Sshin if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 46453541Sshin if (oifp) 46553541Sshin icmp6_ifoutstat_inc(oifp, type, code); 466181803Sbz V_icmp6stat.icp6s_outhist[type]++; 46778064Sume } else 468181803Sbz V_rip6stat.rip6s_opackets++; 46953541Sshin 47053541Sshin goto freectl; 47153541Sshin 47253541Sshin bad: 47353541Sshin if (m) 47453541Sshin m_freem(m); 47553541Sshin 47653541Sshin freectl: 47778064Sume if (control) { 478148247Sume ip6_clearpktopts(&opt, -1); 47953541Sshin m_freem(control); 48078064Sume } 481178285Srwatson INP_WUNLOCK(in6p); 482120856Sume return (error); 48353541Sshin} 48453541Sshin 48553541Sshin/* 48653541Sshin * Raw IPv6 socket option processing. 48753541Sshin */ 48853541Sshinint 489171259Sdelphijrip6_ctloutput(struct socket *so, struct sockopt *sopt) 49053541Sshin{ 49153541Sshin int error; 49253541Sshin 49353541Sshin if (sopt->sopt_level == IPPROTO_ICMPV6) 49453541Sshin /* 49553541Sshin * XXX: is it better to call icmp6_ctloutput() directly 49653541Sshin * from protosw? 49753541Sshin */ 498120856Sume return (icmp6_ctloutput(so, sopt)); 49953541Sshin else if (sopt->sopt_level != IPPROTO_IPV6) 50053541Sshin return (EINVAL); 50153541Sshin 50253541Sshin error = 0; 50353541Sshin 50453541Sshin switch (sopt->sopt_dir) { 50553541Sshin case SOPT_GET: 50653541Sshin switch (sopt->sopt_name) { 50756723Sshin case MRT6_INIT: 50856723Sshin case MRT6_DONE: 50956723Sshin case MRT6_ADD_MIF: 51056723Sshin case MRT6_DEL_MIF: 51156723Sshin case MRT6_ADD_MFC: 51256723Sshin case MRT6_DEL_MFC: 51356723Sshin case MRT6_PIM: 514166938Sbms error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 515166938Sbms EOPNOTSUPP; 51656723Sshin break; 517121578Sume case IPV6_CHECKSUM: 518121578Sume error = ip6_raw_ctloutput(so, sopt); 519121578Sume break; 52053541Sshin default: 52153541Sshin error = ip6_ctloutput(so, sopt); 52253541Sshin break; 52353541Sshin } 52453541Sshin break; 52553541Sshin 52653541Sshin case SOPT_SET: 52753541Sshin switch (sopt->sopt_name) { 52856723Sshin case MRT6_INIT: 52956723Sshin case MRT6_DONE: 53056723Sshin case MRT6_ADD_MIF: 53156723Sshin case MRT6_DEL_MIF: 53256723Sshin case MRT6_ADD_MFC: 53356723Sshin case MRT6_DEL_MFC: 53456723Sshin case MRT6_PIM: 535166938Sbms error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 536166938Sbms EOPNOTSUPP; 53756723Sshin break; 538121578Sume case IPV6_CHECKSUM: 539121578Sume error = ip6_raw_ctloutput(so, sopt); 540121578Sume break; 54153541Sshin default: 54253541Sshin error = ip6_ctloutput(so, sopt); 54353541Sshin break; 54453541Sshin } 54553541Sshin break; 54653541Sshin } 54753541Sshin 54853541Sshin return (error); 54953541Sshin} 55053541Sshin 55153541Sshinstatic int 55283366Sjulianrip6_attach(struct socket *so, int proto, struct thread *td) 55353541Sshin{ 554183550Szec INIT_VNET_INET(so->so_vnet); 55553541Sshin struct inpcb *inp; 556144261Ssam struct icmp6_filter *filter; 557157676Srwatson int error; 55853541Sshin 55953541Sshin inp = sotoinpcb(so); 560157374Srwatson KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 561180305Srwatson 562175630Sbz error = priv_check(td, PRIV_NETINET_RAW); 563175630Sbz if (error) 564180305Srwatson return (error); 56555009Sshin error = soreserve(so, rip_sendspace, rip_recvspace); 566157374Srwatson if (error) 567180305Srwatson return (error); 568184214Sdes filter = malloc(sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 569157374Srwatson if (filter == NULL) 570180305Srwatson return (ENOMEM); 571181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 572181803Sbz error = in_pcballoc(so, &V_ripcbinfo); 573132714Srwatson if (error) { 574181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 575184205Sdes free(filter, M_PCB); 576180305Srwatson return (error); 577132714Srwatson } 57853541Sshin inp = (struct inpcb *)so->so_pcb; 579181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 58053541Sshin inp->inp_vflag |= INP_IPV6; 58153541Sshin inp->in6p_ip6_nxt = (long)proto; 58253541Sshin inp->in6p_hops = -1; /* use kernel default */ 58353541Sshin inp->in6p_cksum = -1; 584144261Ssam inp->in6p_icmp6filt = filter; 58553541Sshin ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 586178285Srwatson INP_WUNLOCK(inp); 587180305Srwatson return (0); 58853541Sshin} 58953541Sshin 590157370Srwatsonstatic void 59153541Sshinrip6_detach(struct socket *so) 59253541Sshin{ 593183550Szec INIT_VNET_INET(so->so_vnet); 59453541Sshin struct inpcb *inp; 59553541Sshin 59653541Sshin inp = sotoinpcb(so); 597157374Srwatson KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 598160549Srwatson 599166938Sbms if (so == ip6_mrouter && ip6_mrouter_done) 600166938Sbms ip6_mrouter_done(); 60153541Sshin /* xxx: RSVP */ 602181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 603178285Srwatson INP_WLOCK(inp); 604184205Sdes free(inp->in6p_icmp6filt, M_PCB); 60553541Sshin in6_pcbdetach(inp); 606157374Srwatson in6_pcbfree(inp); 607181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 60853541Sshin} 60953541Sshin 610160549Srwatson/* XXXRW: This can't ever be called. */ 611157366Srwatsonstatic void 61253541Sshinrip6_abort(struct socket *so) 61353541Sshin{ 614160549Srwatson struct inpcb *inp; 615160549Srwatson 616160549Srwatson inp = sotoinpcb(so); 617160549Srwatson KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 618160549Srwatson 61953541Sshin soisdisconnected(so); 62053541Sshin} 62153541Sshin 622160549Srwatsonstatic void 623160549Srwatsonrip6_close(struct socket *so) 624160549Srwatson{ 625160549Srwatson struct inpcb *inp; 626160549Srwatson 627160549Srwatson inp = sotoinpcb(so); 628160549Srwatson KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 629160549Srwatson 630160549Srwatson soisdisconnected(so); 631160549Srwatson} 632160549Srwatson 63353541Sshinstatic int 63453541Sshinrip6_disconnect(struct socket *so) 63553541Sshin{ 636180305Srwatson struct inpcb *inp; 63753541Sshin 638180305Srwatson inp = sotoinpcb(so); 639180305Srwatson KASSERT(inp != NULL, ("rip6_disconnect: inp == NULL")); 640180305Srwatson 64197658Stanimura if ((so->so_state & SS_ISCONNECTED) == 0) 642180305Srwatson return (ENOTCONN); 64353541Sshin inp->in6p_faddr = in6addr_any; 644157366Srwatson rip6_abort(so); 645157374Srwatson return (0); 64653541Sshin} 64753541Sshin 64853541Sshinstatic int 64983366Sjulianrip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 65053541Sshin{ 651183550Szec INIT_VNET_NET(so->so_vnet); 652183550Szec INIT_VNET_INET(so->so_vnet); 653183550Szec INIT_VNET_INET6(so->so_vnet); 654180305Srwatson struct inpcb *inp; 65553541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 65653541Sshin struct ifaddr *ia = NULL; 657148385Sume int error = 0; 65853541Sshin 659180305Srwatson inp = sotoinpcb(so); 660157374Srwatson KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 661180305Srwatson 66253541Sshin if (nam->sa_len != sizeof(*addr)) 663180305Srwatson return (EINVAL); 664181803Sbz if (TAILQ_EMPTY(&V_ifnet) || addr->sin6_family != AF_INET6) 665180305Srwatson return (EADDRNOTAVAIL); 666181803Sbz if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 667180305Srwatson return (error); 668148385Sume 66953541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 67053541Sshin (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 671180305Srwatson return (EADDRNOTAVAIL); 67253541Sshin if (ia && 67353541Sshin ((struct in6_ifaddr *)ia)->ia6_flags & 67453541Sshin (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 67553541Sshin IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 676120856Sume return (EADDRNOTAVAIL); 67753541Sshin } 678181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 679178285Srwatson INP_WLOCK(inp); 68053541Sshin inp->in6p_laddr = addr->sin6_addr; 681178285Srwatson INP_WUNLOCK(inp); 682181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 683180305Srwatson return (0); 68453541Sshin} 68553541Sshin 68653541Sshinstatic int 68783366Sjulianrip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 68853541Sshin{ 689183550Szec INIT_VNET_NET(so->so_vnet); 690183550Szec INIT_VNET_INET(so->so_vnet); 691183550Szec INIT_VNET_INET6(so->so_vnet); 692180305Srwatson struct inpcb *inp; 69353541Sshin struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 69453541Sshin struct in6_addr *in6a = NULL; 695148385Sume struct ifnet *ifp = NULL; 696148385Sume int error = 0, scope_ambiguous = 0; 69753541Sshin 698180305Srwatson inp = sotoinpcb(so); 699157374Srwatson KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 700180305Srwatson 70153541Sshin if (nam->sa_len != sizeof(*addr)) 702180305Srwatson return (EINVAL); 703181803Sbz if (TAILQ_EMPTY(&V_ifnet)) 704180305Srwatson return (EADDRNOTAVAIL); 70553541Sshin if (addr->sin6_family != AF_INET6) 706180305Srwatson return (EAFNOSUPPORT); 707148385Sume 708148385Sume /* 709180305Srwatson * Application should provide a proper zone ID or the use of default 710180305Srwatson * zone IDs should be enabled. Unfortunately, some applications do 711180305Srwatson * not behave as it should, so we need a workaround. Even if an 712180305Srwatson * appropriate ID is not determined, we'll see if we can determine 713180305Srwatson * the outgoing interface. If we can, determine the zone ID based on 714180305Srwatson * the interface below. 715148385Sume */ 716181803Sbz if (addr->sin6_scope_id == 0 && !V_ip6_use_defzone) 717148385Sume scope_ambiguous = 1; 718181803Sbz if ((error = sa6_embedscope(addr, V_ip6_use_defzone)) != 0) 719180305Srwatson return (error); 720148385Sume 721181803Sbz INP_INFO_WLOCK(&V_ripcbinfo); 722178285Srwatson INP_WLOCK(inp); 72353541Sshin /* Source address selection. XXX: need pcblookup? */ 72453541Sshin in6a = in6_selectsrc(addr, inp->in6p_outputopts, 725180371Sbz inp, NULL, so->so_cred, 726180371Sbz &ifp, &error); 727132714Srwatson if (in6a == NULL) { 728178285Srwatson INP_WUNLOCK(inp); 729181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 73053541Sshin return (error ? error : EADDRNOTAVAIL); 731132714Srwatson } 732148385Sume 733148385Sume /* XXX: see above */ 734148385Sume if (ifp && scope_ambiguous && 735148385Sume (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 736178285Srwatson INP_WUNLOCK(inp); 737181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 738180305Srwatson return (error); 739148385Sume } 740148385Sume inp->in6p_faddr = addr->sin6_addr; 74153541Sshin inp->in6p_laddr = *in6a; 74253541Sshin soisconnected(so); 743178285Srwatson INP_WUNLOCK(inp); 744181803Sbz INP_INFO_WUNLOCK(&V_ripcbinfo); 745180305Srwatson return (0); 74653541Sshin} 74753541Sshin 74853541Sshinstatic int 74953541Sshinrip6_shutdown(struct socket *so) 75053541Sshin{ 751132714Srwatson struct inpcb *inp; 752132714Srwatson 753132714Srwatson inp = sotoinpcb(so); 754157374Srwatson KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 755180305Srwatson 756178285Srwatson INP_WLOCK(inp); 75753541Sshin socantsendmore(so); 758178285Srwatson INP_WUNLOCK(inp); 759180305Srwatson return (0); 76053541Sshin} 76153541Sshin 76253541Sshinstatic int 76353541Sshinrip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 764171260Sdelphij struct mbuf *control, struct thread *td) 76553541Sshin{ 766183550Szec INIT_VNET_INET(so->so_vnet); 767180305Srwatson struct inpcb *inp; 76853541Sshin struct sockaddr_in6 tmp; 76953541Sshin struct sockaddr_in6 *dst; 770132714Srwatson int ret; 77153541Sshin 772180305Srwatson inp = sotoinpcb(so); 773157374Srwatson KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 774180305Srwatson 775180305Srwatson /* Always copy sockaddr to avoid overwrites. */ 776132714Srwatson /* Unlocked read. */ 77753541Sshin if (so->so_state & SS_ISCONNECTED) { 77853541Sshin if (nam) { 77953541Sshin m_freem(m); 780180305Srwatson return (EISCONN); 78153541Sshin } 78253541Sshin /* XXX */ 78353541Sshin bzero(&tmp, sizeof(tmp)); 78453541Sshin tmp.sin6_family = AF_INET6; 78553541Sshin tmp.sin6_len = sizeof(struct sockaddr_in6); 786180990Srwatson INP_RLOCK(inp); 78753541Sshin bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 788180990Srwatson sizeof(struct in6_addr)); 789180990Srwatson INP_RUNLOCK(inp); 79053541Sshin dst = &tmp; 79153541Sshin } else { 79253541Sshin if (nam == NULL) { 79353541Sshin m_freem(m); 794180305Srwatson return (ENOTCONN); 79553541Sshin } 796148385Sume if (nam->sa_len != sizeof(struct sockaddr_in6)) { 797148385Sume m_freem(m); 798180305Srwatson return (EINVAL); 799148385Sume } 80062587Sitojun tmp = *(struct sockaddr_in6 *)nam; 80162587Sitojun dst = &tmp; 802148385Sume 803148385Sume if (dst->sin6_family == AF_UNSPEC) { 804148385Sume /* 805148385Sume * XXX: we allow this case for backward 806148385Sume * compatibility to buggy applications that 807148385Sume * rely on old (and wrong) kernel behavior. 808148385Sume */ 809148385Sume log(LOG_INFO, "rip6 SEND: address family is " 810148385Sume "unspec. Assume AF_INET6\n"); 811148385Sume dst->sin6_family = AF_INET6; 812148385Sume } else if (dst->sin6_family != AF_INET6) { 813148385Sume m_freem(m); 814148385Sume return(EAFNOSUPPORT); 815148385Sume } 81653541Sshin } 817132714Srwatson ret = rip6_output(m, so, dst, control); 818132714Srwatson return (ret); 81953541Sshin} 82053541Sshin 82153541Sshinstruct pr_usrreqs rip6_usrreqs = { 822137386Sphk .pru_abort = rip6_abort, 823137386Sphk .pru_attach = rip6_attach, 824137386Sphk .pru_bind = rip6_bind, 825137386Sphk .pru_connect = rip6_connect, 826137386Sphk .pru_control = in6_control, 827137386Sphk .pru_detach = rip6_detach, 828137386Sphk .pru_disconnect = rip6_disconnect, 829169462Srwatson .pru_peeraddr = in6_getpeeraddr, 830137386Sphk .pru_send = rip6_send, 831137386Sphk .pru_shutdown = rip6_shutdown, 832169462Srwatson .pru_sockaddr = in6_getsockaddr, 833160549Srwatson .pru_close = rip6_close, 83453541Sshin}; 835