raw_ip6.c revision 171167
1219820Sjeff/*- 2219820Sjeff * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3219820Sjeff * All rights reserved. 4219820Sjeff * 5219820Sjeff * Redistribution and use in source and binary forms, with or without 6219820Sjeff * modification, are permitted provided that the following conditions 7219820Sjeff * are met: 8219820Sjeff * 1. Redistributions of source code must retain the above copyright 9219820Sjeff * notice, this list of conditions and the following disclaimer. 10219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 11219820Sjeff * notice, this list of conditions and the following disclaimer in the 12219820Sjeff * documentation and/or other materials provided with the distribution. 13219820Sjeff * 3. Neither the name of the project nor the names of its contributors 14219820Sjeff * may be used to endorse or promote products derived from this software 15219820Sjeff * without specific prior written permission. 16219820Sjeff * 17219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18219820Sjeff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19219820Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20219820Sjeff * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21219820Sjeff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22219820Sjeff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23219820Sjeff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24219820Sjeff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25219820Sjeff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26219820Sjeff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27219820Sjeff * SUCH DAMAGE. 28219820Sjeff * 29219820Sjeff * $FreeBSD: head/sys/netinet6/raw_ip6.c 171167 2007-07-03 12:13:45Z gnn $ 30219820Sjeff */ 31219820Sjeff 32219820Sjeff/*- 33219820Sjeff * Copyright (c) 1982, 1986, 1988, 1993 34219820Sjeff * The Regents of the University of California. All rights reserved. 35219820Sjeff * 36219820Sjeff * Redistribution and use in source and binary forms, with or without 37219820Sjeff * modification, are permitted provided that the following conditions 38219820Sjeff * are met: 39219820Sjeff * 1. Redistributions of source code must retain the above copyright 40219820Sjeff * notice, this list of conditions and the following disclaimer. 41219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 42219820Sjeff * notice, this list of conditions and the following disclaimer in the 43219820Sjeff * documentation and/or other materials provided with the distribution. 44219820Sjeff * 4. Neither the name of the University nor the names of its contributors 45219820Sjeff * may be used to endorse or promote products derived from this software 46219820Sjeff * without specific prior written permission. 47219820Sjeff * 48219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49219820Sjeff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50219820Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51219820Sjeff * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52219820Sjeff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53219820Sjeff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54219820Sjeff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55219820Sjeff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56219820Sjeff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57219820Sjeff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58219820Sjeff * SUCH DAMAGE. 59219820Sjeff * 60219820Sjeff * @(#)raw_ip.c 8.2 (Berkeley) 1/4/94 61219820Sjeff */ 62219820Sjeff 63219820Sjeff#include "opt_ipsec.h" 64219820Sjeff#include "opt_inet6.h" 65219820Sjeff 66219820Sjeff#include <sys/param.h> 67219820Sjeff#include <sys/errno.h> 68219820Sjeff#include <sys/lock.h> 69219820Sjeff#include <sys/malloc.h> 70219820Sjeff#include <sys/mbuf.h> 71219820Sjeff#include <sys/priv.h> 72219820Sjeff#include <sys/proc.h> 73219820Sjeff#include <sys/protosw.h> 74219820Sjeff#include <sys/signalvar.h> 75219820Sjeff#include <sys/socket.h> 76219820Sjeff#include <sys/socketvar.h> 77219820Sjeff#include <sys/sx.h> 78219820Sjeff#include <sys/syslog.h> 79219820Sjeff 80219820Sjeff#include <net/if.h> 81219820Sjeff#include <net/if_types.h> 82219820Sjeff#include <net/route.h> 83219820Sjeff 84219820Sjeff#include <netinet/in.h> 85219820Sjeff#include <netinet/in_var.h> 86219820Sjeff#include <netinet/in_systm.h> 87219820Sjeff#include <netinet/icmp6.h> 88219820Sjeff#include <netinet/in_pcb.h> 89219820Sjeff#include <netinet/ip6.h> 90219820Sjeff#include <netinet6/ip6protosw.h> 91219820Sjeff#include <netinet6/ip6_mroute.h> 92219820Sjeff#include <netinet6/in6_pcb.h> 93219820Sjeff#include <netinet6/ip6_var.h> 94219820Sjeff#include <netinet6/nd6.h> 95219820Sjeff#include <netinet6/raw_ip6.h> 96219820Sjeff#include <netinet6/scope6_var.h> 97219820Sjeff 98219820Sjeff#ifdef IPSEC 99219820Sjeff#include <netipsec/ipsec.h> 100219820Sjeff#include <netipsec/ipsec6.h> 101219820Sjeff#endif /* IPSEC */ 102219820Sjeff 103219820Sjeff#include <machine/stdarg.h> 104219820Sjeff 105219820Sjeff#define satosin6(sa) ((struct sockaddr_in6 *)(sa)) 106219820Sjeff#define ifatoia6(ifa) ((struct in6_ifaddr *)(ifa)) 107219820Sjeff 108219820Sjeff/* 109219820Sjeff * Raw interface to IP6 protocol. 110219820Sjeff */ 111219820Sjeff 112219820Sjeffextern struct inpcbhead ripcb; 113219820Sjeffextern struct inpcbinfo ripcbinfo; 114219820Sjeffextern u_long rip_sendspace; 115219820Sjeffextern u_long rip_recvspace; 116219820Sjeff 117219820Sjeffstruct rip6stat rip6stat; 118219820Sjeff 119219820Sjeff/* 120219820Sjeff * Hooks for multicast forwarding. 121219820Sjeff */ 122219820Sjeffstruct socket *ip6_mrouter = NULL; 123219820Sjeffint (*ip6_mrouter_set)(struct socket *, struct sockopt *); 124219820Sjeffint (*ip6_mrouter_get)(struct socket *, struct sockopt *); 125219820Sjeffint (*ip6_mrouter_done)(void); 126219820Sjeffint (*ip6_mforward)(struct ip6_hdr *, struct ifnet *, struct mbuf *); 127219820Sjeffint (*mrt6_ioctl)(int, caddr_t); 128219820Sjeff 129219820Sjeff/* 130219820Sjeff * Setup generic address and protocol structures 131219820Sjeff * for raw_input routine, then pass them along with 132219820Sjeff * mbuf chain. 133219820Sjeff */ 134219820Sjeffint 135219820Sjeffrip6_input(mp, offp, proto) 136219820Sjeff struct mbuf **mp; 137219820Sjeff int *offp, proto; 138219820Sjeff{ 139219820Sjeff struct mbuf *m = *mp; 140219820Sjeff register struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 141219820Sjeff register struct inpcb *in6p; 142219820Sjeff struct inpcb *last = 0; 143219820Sjeff struct mbuf *opts = NULL; 144219820Sjeff struct sockaddr_in6 fromsa; 145219820Sjeff 146219820Sjeff rip6stat.rip6s_ipackets++; 147219820Sjeff 148219820Sjeff if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 149219820Sjeff /* XXX send icmp6 host/port unreach? */ 150219820Sjeff m_freem(m); 151219820Sjeff return IPPROTO_DONE; 152219820Sjeff } 153219820Sjeff 154219820Sjeff init_sin6(&fromsa, m); /* general init */ 155219820Sjeff 156219820Sjeff INP_INFO_RLOCK(&ripcbinfo); 157219820Sjeff LIST_FOREACH(in6p, &ripcb, inp_list) { 158219820Sjeff INP_LOCK(in6p); 159219820Sjeff if ((in6p->in6p_vflag & INP_IPV6) == 0) { 160219820Sjeffdocontinue: 161219820Sjeff INP_UNLOCK(in6p); 162219820Sjeff continue; 163219820Sjeff } 164219820Sjeff if (in6p->in6p_ip6_nxt && 165219820Sjeff in6p->in6p_ip6_nxt != proto) 166219820Sjeff goto docontinue; 167219820Sjeff if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) && 168219820Sjeff !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) 169219820Sjeff goto docontinue; 170219820Sjeff if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr) && 171219820Sjeff !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src)) 172219820Sjeff goto docontinue; 173219820Sjeff if (in6p->in6p_cksum != -1) { 174219820Sjeff rip6stat.rip6s_isum++; 175219820Sjeff if (in6_cksum(m, proto, *offp, 176219820Sjeff m->m_pkthdr.len - *offp)) { 177219820Sjeff rip6stat.rip6s_badsum++; 178219820Sjeff goto docontinue; 179219820Sjeff } 180219820Sjeff } 181219820Sjeff if (last) { 182219820Sjeff struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 183219820Sjeff 184219820Sjeff#ifdef IPSEC 185219820Sjeff /* 186219820Sjeff * Check AH/ESP integrity. 187219820Sjeff */ 188219820Sjeff if (n && ipsec6_in_reject(n, last)) { 189219820Sjeff m_freem(n); 190219820Sjeff ipsec6stat.in_polvio++; 191219820Sjeff /* do not inject data into pcb */ 192219820Sjeff } else 193219820Sjeff#endif /* IPSEC */ 194219820Sjeff if (n) { 195219820Sjeff if (last->in6p_flags & IN6P_CONTROLOPTS || 196219820Sjeff last->in6p_socket->so_options & SO_TIMESTAMP) 197219820Sjeff ip6_savecontrol(last, n, &opts); 198219820Sjeff /* strip intermediate headers */ 199219820Sjeff m_adj(n, *offp); 200219820Sjeff if (sbappendaddr(&last->in6p_socket->so_rcv, 201219820Sjeff (struct sockaddr *)&fromsa, 202219820Sjeff n, opts) == 0) { 203219820Sjeff m_freem(n); 204219820Sjeff if (opts) 205219820Sjeff m_freem(opts); 206219820Sjeff rip6stat.rip6s_fullsock++; 207219820Sjeff } else 208219820Sjeff sorwakeup(last->in6p_socket); 209219820Sjeff opts = NULL; 210219820Sjeff } 211219820Sjeff INP_UNLOCK(last); 212219820Sjeff } 213219820Sjeff last = in6p; 214219820Sjeff } 215219820Sjeff#ifdef IPSEC 216219820Sjeff /* 217219820Sjeff * Check AH/ESP integrity. 218219820Sjeff */ 219219820Sjeff if (last && ipsec6_in_reject(m, last)) { 220219820Sjeff m_freem(m); 221219820Sjeff ipsec6stat.in_polvio++; 222219820Sjeff ip6stat.ip6s_delivered--; 223219820Sjeff /* do not inject data into pcb */ 224219820Sjeff INP_UNLOCK(last); 225219820Sjeff } else 226219820Sjeff#endif /* IPSEC */ 227219820Sjeff if (last) { 228219820Sjeff if (last->in6p_flags & IN6P_CONTROLOPTS || 229219820Sjeff last->in6p_socket->so_options & SO_TIMESTAMP) 230219820Sjeff ip6_savecontrol(last, m, &opts); 231219820Sjeff /* strip intermediate headers */ 232219820Sjeff m_adj(m, *offp); 233219820Sjeff if (sbappendaddr(&last->in6p_socket->so_rcv, 234219820Sjeff (struct sockaddr *)&fromsa, m, opts) == 0) { 235219820Sjeff m_freem(m); 236219820Sjeff if (opts) 237219820Sjeff m_freem(opts); 238219820Sjeff rip6stat.rip6s_fullsock++; 239219820Sjeff } else 240219820Sjeff sorwakeup(last->in6p_socket); 241219820Sjeff INP_UNLOCK(last); 242219820Sjeff } else { 243219820Sjeff rip6stat.rip6s_nosock++; 244219820Sjeff if (m->m_flags & M_MCAST) 245219820Sjeff rip6stat.rip6s_nosockmcast++; 246219820Sjeff if (proto == IPPROTO_NONE) 247219820Sjeff m_freem(m); 248219820Sjeff else { 249219820Sjeff char *prvnxtp = ip6_get_prevhdr(m, *offp); /* XXX */ 250219820Sjeff icmp6_error(m, ICMP6_PARAM_PROB, 251219820Sjeff ICMP6_PARAMPROB_NEXTHEADER, 252219820Sjeff prvnxtp - mtod(m, char *)); 253219820Sjeff } 254219820Sjeff ip6stat.ip6s_delivered--; 255219820Sjeff } 256219820Sjeff INP_INFO_RUNLOCK(&ripcbinfo); 257219820Sjeff return IPPROTO_DONE; 258219820Sjeff} 259219820Sjeff 260219820Sjeffvoid 261219820Sjeffrip6_ctlinput(cmd, sa, d) 262219820Sjeff int cmd; 263219820Sjeff struct sockaddr *sa; 264219820Sjeff void *d; 265219820Sjeff{ 266219820Sjeff struct ip6_hdr *ip6; 267219820Sjeff struct mbuf *m; 268219820Sjeff int off = 0; 269219820Sjeff struct ip6ctlparam *ip6cp = NULL; 270219820Sjeff const struct sockaddr_in6 *sa6_src = NULL; 271219820Sjeff void *cmdarg; 272219820Sjeff struct inpcb *(*notify) __P((struct inpcb *, int)) = in6_rtchange; 273219820Sjeff 274219820Sjeff if (sa->sa_family != AF_INET6 || 275219820Sjeff sa->sa_len != sizeof(struct sockaddr_in6)) 276219820Sjeff return; 277219820Sjeff 278219820Sjeff if ((unsigned)cmd >= PRC_NCMDS) 279219820Sjeff return; 280219820Sjeff if (PRC_IS_REDIRECT(cmd)) 281219820Sjeff notify = in6_rtchange, d = NULL; 282219820Sjeff else if (cmd == PRC_HOSTDEAD) 283219820Sjeff d = NULL; 284219820Sjeff else if (inet6ctlerrmap[cmd] == 0) 285219820Sjeff return; 286219820Sjeff 287219820Sjeff /* if the parameter is from icmp6, decode it. */ 288219820Sjeff if (d != NULL) { 289219820Sjeff ip6cp = (struct ip6ctlparam *)d; 290219820Sjeff m = ip6cp->ip6c_m; 291219820Sjeff ip6 = ip6cp->ip6c_ip6; 292219820Sjeff off = ip6cp->ip6c_off; 293219820Sjeff cmdarg = ip6cp->ip6c_cmdarg; 294219820Sjeff sa6_src = ip6cp->ip6c_src; 295219820Sjeff } else { 296219820Sjeff m = NULL; 297219820Sjeff ip6 = NULL; 298219820Sjeff cmdarg = NULL; 299219820Sjeff sa6_src = &sa6_any; 300219820Sjeff } 301219820Sjeff 302219820Sjeff (void) in6_pcbnotify(&ripcbinfo, sa, 0, 303219820Sjeff (const struct sockaddr *)sa6_src, 304219820Sjeff 0, cmd, cmdarg, notify); 305219820Sjeff} 306219820Sjeff 307219820Sjeff/* 308219820Sjeff * Generate IPv6 header and pass packet to ip6_output. 309219820Sjeff * Tack on options user may have setup with control call. 310219820Sjeff */ 311219820Sjeffint 312219820Sjeff#if __STDC__ 313219820Sjeffrip6_output(struct mbuf *m, ...) 314219820Sjeff#else 315219820Sjeffrip6_output(m, va_alist) 316219820Sjeff struct mbuf *m; 317219820Sjeff va_dcl 318219820Sjeff#endif 319219820Sjeff{ 320219820Sjeff struct mbuf *control; 321219820Sjeff struct socket *so; 322219820Sjeff struct sockaddr_in6 *dstsock; 323219820Sjeff struct in6_addr *dst; 324219820Sjeff struct ip6_hdr *ip6; 325219820Sjeff struct inpcb *in6p; 326219820Sjeff u_int plen = m->m_pkthdr.len; 327219820Sjeff int error = 0; 328219820Sjeff struct ip6_pktopts opt, *optp; 329219820Sjeff struct ifnet *oifp = NULL; 330219820Sjeff int type = 0, code = 0; /* for ICMPv6 output statistics only */ 331219820Sjeff int priv = 0; 332219820Sjeff int scope_ambiguous = 0; 333219820Sjeff struct in6_addr *in6a; 334219820Sjeff va_list ap; 335219820Sjeff 336219820Sjeff va_start(ap, m); 337219820Sjeff so = va_arg(ap, struct socket *); 338219820Sjeff dstsock = va_arg(ap, struct sockaddr_in6 *); 339219820Sjeff control = va_arg(ap, struct mbuf *); 340219820Sjeff va_end(ap); 341219820Sjeff 342219820Sjeff in6p = sotoin6pcb(so); 343219820Sjeff INP_LOCK(in6p); 344219820Sjeff 345219820Sjeff priv = 0; 346219820Sjeff if (suser_cred(so->so_cred, 0) == 0) 347219820Sjeff priv = 1; 348219820Sjeff dst = &dstsock->sin6_addr; 349219820Sjeff if (control) { 350219820Sjeff if ((error = ip6_setpktopts(control, &opt, 351219820Sjeff in6p->in6p_outputopts, priv, so->so_proto->pr_protocol)) 352219820Sjeff != 0) { 353219820Sjeff goto bad; 354219820Sjeff } 355219820Sjeff optp = &opt; 356219820Sjeff } else 357219820Sjeff optp = in6p->in6p_outputopts; 358219820Sjeff 359219820Sjeff /* 360219820Sjeff * Check and convert scope zone ID into internal form. 361219820Sjeff * XXX: we may still need to determine the zone later. 362219820Sjeff */ 363219820Sjeff if (!(so->so_state & SS_ISCONNECTED)) { 364219820Sjeff if (dstsock->sin6_scope_id == 0 && !ip6_use_defzone) 365219820Sjeff scope_ambiguous = 1; 366219820Sjeff if ((error = sa6_embedscope(dstsock, ip6_use_defzone)) != 0) 367219820Sjeff goto bad; 368219820Sjeff } 369219820Sjeff 370219820Sjeff /* 371219820Sjeff * For an ICMPv6 packet, we should know its type and code 372219820Sjeff * to update statistics. 373219820Sjeff */ 374219820Sjeff if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 375219820Sjeff struct icmp6_hdr *icmp6; 376219820Sjeff if (m->m_len < sizeof(struct icmp6_hdr) && 377219820Sjeff (m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) { 378219820Sjeff error = ENOBUFS; 379219820Sjeff goto bad; 380219820Sjeff } 381219820Sjeff icmp6 = mtod(m, struct icmp6_hdr *); 382219820Sjeff type = icmp6->icmp6_type; 383219820Sjeff code = icmp6->icmp6_code; 384219820Sjeff } 385219820Sjeff 386219820Sjeff M_PREPEND(m, sizeof(*ip6), M_DONTWAIT); 387219820Sjeff if (m == NULL) { 388219820Sjeff error = ENOBUFS; 389219820Sjeff goto bad; 390219820Sjeff } 391219820Sjeff ip6 = mtod(m, struct ip6_hdr *); 392219820Sjeff 393219820Sjeff /* 394219820Sjeff * Source address selection. 395219820Sjeff */ 396219820Sjeff if ((in6a = in6_selectsrc(dstsock, optp, in6p->in6p_moptions, NULL, 397219820Sjeff &in6p->in6p_laddr, &oifp, &error)) == NULL) { 398219820Sjeff if (error == 0) 399219820Sjeff error = EADDRNOTAVAIL; 400219820Sjeff goto bad; 401219820Sjeff } 402219820Sjeff ip6->ip6_src = *in6a; 403219820Sjeff 404219820Sjeff if (oifp && scope_ambiguous) { 405219820Sjeff /* 406219820Sjeff * Application should provide a proper zone ID or the use of 407219820Sjeff * default zone IDs should be enabled. Unfortunately, some 408219820Sjeff * applications do not behave as it should, so we need a 409219820Sjeff * workaround. Even if an appropriate ID is not determined 410219820Sjeff * (when it's required), if we can determine the outgoing 411219820Sjeff * interface. determine the zone ID based on the interface. 412219820Sjeff */ 413219820Sjeff error = in6_setscope(&dstsock->sin6_addr, oifp, NULL); 414219820Sjeff if (error != 0) 415219820Sjeff goto bad; 416219820Sjeff } 417219820Sjeff ip6->ip6_dst = dstsock->sin6_addr; 418219820Sjeff 419219820Sjeff /* fill in the rest of the IPv6 header fields */ 420219820Sjeff ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) | 421219820Sjeff (in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK); 422219820Sjeff ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) | 423219820Sjeff (IPV6_VERSION & IPV6_VERSION_MASK); 424219820Sjeff /* ip6_plen will be filled in ip6_output, so not fill it here. */ 425219820Sjeff ip6->ip6_nxt = in6p->in6p_ip6_nxt; 426219820Sjeff ip6->ip6_hlim = in6_selecthlim(in6p, oifp); 427219820Sjeff 428219820Sjeff if (so->so_proto->pr_protocol == IPPROTO_ICMPV6 || 429219820Sjeff in6p->in6p_cksum != -1) { 430219820Sjeff struct mbuf *n; 431219820Sjeff int off; 432219820Sjeff u_int16_t *p; 433219820Sjeff 434219820Sjeff /* compute checksum */ 435219820Sjeff if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) 436219820Sjeff off = offsetof(struct icmp6_hdr, icmp6_cksum); 437219820Sjeff else 438219820Sjeff off = in6p->in6p_cksum; 439219820Sjeff if (plen < off + 1) { 440219820Sjeff error = EINVAL; 441219820Sjeff goto bad; 442219820Sjeff } 443219820Sjeff off += sizeof(struct ip6_hdr); 444219820Sjeff 445219820Sjeff n = m; 446219820Sjeff while (n && n->m_len <= off) { 447219820Sjeff off -= n->m_len; 448219820Sjeff n = n->m_next; 449219820Sjeff } 450219820Sjeff if (!n) 451219820Sjeff goto bad; 452219820Sjeff p = (u_int16_t *)(mtod(n, caddr_t) + off); 453219820Sjeff *p = 0; 454219820Sjeff *p = in6_cksum(m, ip6->ip6_nxt, sizeof(*ip6), plen); 455219820Sjeff } 456219820Sjeff 457219820Sjeff error = ip6_output(m, optp, NULL, 0, in6p->in6p_moptions, &oifp, in6p); 458219820Sjeff if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) { 459219820Sjeff if (oifp) 460219820Sjeff icmp6_ifoutstat_inc(oifp, type, code); 461219820Sjeff icmp6stat.icp6s_outhist[type]++; 462219820Sjeff } else 463219820Sjeff rip6stat.rip6s_opackets++; 464219820Sjeff 465219820Sjeff goto freectl; 466219820Sjeff 467219820Sjeff bad: 468219820Sjeff if (m) 469219820Sjeff m_freem(m); 470219820Sjeff 471219820Sjeff freectl: 472219820Sjeff if (control) { 473219820Sjeff ip6_clearpktopts(&opt, -1); 474219820Sjeff m_freem(control); 475219820Sjeff } 476219820Sjeff INP_UNLOCK(in6p); 477219820Sjeff return (error); 478219820Sjeff} 479219820Sjeff 480219820Sjeff/* 481219820Sjeff * Raw IPv6 socket option processing. 482219820Sjeff */ 483219820Sjeffint 484219820Sjeffrip6_ctloutput(so, sopt) 485219820Sjeff struct socket *so; 486219820Sjeff struct sockopt *sopt; 487219820Sjeff{ 488219820Sjeff int error; 489219820Sjeff 490219820Sjeff if (sopt->sopt_level == IPPROTO_ICMPV6) 491219820Sjeff /* 492219820Sjeff * XXX: is it better to call icmp6_ctloutput() directly 493219820Sjeff * from protosw? 494219820Sjeff */ 495219820Sjeff return (icmp6_ctloutput(so, sopt)); 496219820Sjeff else if (sopt->sopt_level != IPPROTO_IPV6) 497219820Sjeff return (EINVAL); 498219820Sjeff 499219820Sjeff error = 0; 500219820Sjeff 501219820Sjeff switch (sopt->sopt_dir) { 502219820Sjeff case SOPT_GET: 503219820Sjeff switch (sopt->sopt_name) { 504219820Sjeff case MRT6_INIT: 505219820Sjeff case MRT6_DONE: 506219820Sjeff case MRT6_ADD_MIF: 507219820Sjeff case MRT6_DEL_MIF: 508219820Sjeff case MRT6_ADD_MFC: 509219820Sjeff case MRT6_DEL_MFC: 510219820Sjeff case MRT6_PIM: 511219820Sjeff error = ip6_mrouter_get ? ip6_mrouter_get(so, sopt) : 512219820Sjeff EOPNOTSUPP; 513219820Sjeff break; 514219820Sjeff case IPV6_CHECKSUM: 515219820Sjeff error = ip6_raw_ctloutput(so, sopt); 516219820Sjeff break; 517219820Sjeff default: 518219820Sjeff error = ip6_ctloutput(so, sopt); 519219820Sjeff break; 520219820Sjeff } 521219820Sjeff break; 522219820Sjeff 523219820Sjeff case SOPT_SET: 524219820Sjeff switch (sopt->sopt_name) { 525219820Sjeff case MRT6_INIT: 526219820Sjeff case MRT6_DONE: 527219820Sjeff case MRT6_ADD_MIF: 528219820Sjeff case MRT6_DEL_MIF: 529219820Sjeff case MRT6_ADD_MFC: 530219820Sjeff case MRT6_DEL_MFC: 531219820Sjeff case MRT6_PIM: 532219820Sjeff error = ip6_mrouter_set ? ip6_mrouter_set(so, sopt) : 533219820Sjeff EOPNOTSUPP; 534219820Sjeff break; 535219820Sjeff case IPV6_CHECKSUM: 536219820Sjeff error = ip6_raw_ctloutput(so, sopt); 537219820Sjeff break; 538219820Sjeff default: 539219820Sjeff error = ip6_ctloutput(so, sopt); 540219820Sjeff break; 541219820Sjeff } 542219820Sjeff break; 543219820Sjeff } 544219820Sjeff 545219820Sjeff return (error); 546219820Sjeff} 547219820Sjeff 548219820Sjeffstatic int 549219820Sjeffrip6_attach(struct socket *so, int proto, struct thread *td) 550219820Sjeff{ 551219820Sjeff struct inpcb *inp; 552219820Sjeff struct icmp6_filter *filter; 553219820Sjeff int error; 554219820Sjeff 555219820Sjeff inp = sotoinpcb(so); 556219820Sjeff KASSERT(inp == NULL, ("rip6_attach: inp != NULL")); 557219820Sjeff if (td && (error = suser(td)) != 0) 558219820Sjeff return error; 559219820Sjeff error = soreserve(so, rip_sendspace, rip_recvspace); 560219820Sjeff if (error) 561219820Sjeff return error; 562219820Sjeff MALLOC(filter, struct icmp6_filter *, 563219820Sjeff sizeof(struct icmp6_filter), M_PCB, M_NOWAIT); 564219820Sjeff if (filter == NULL) 565219820Sjeff return ENOMEM; 566219820Sjeff INP_INFO_WLOCK(&ripcbinfo); 567219820Sjeff error = in_pcballoc(so, &ripcbinfo); 568219820Sjeff if (error) { 569219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 570219820Sjeff FREE(filter, M_PCB); 571219820Sjeff return error; 572219820Sjeff } 573219820Sjeff inp = (struct inpcb *)so->so_pcb; 574219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 575219820Sjeff inp->inp_vflag |= INP_IPV6; 576219820Sjeff inp->in6p_ip6_nxt = (long)proto; 577219820Sjeff inp->in6p_hops = -1; /* use kernel default */ 578219820Sjeff inp->in6p_cksum = -1; 579219820Sjeff inp->in6p_icmp6filt = filter; 580219820Sjeff ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt); 581219820Sjeff INP_UNLOCK(inp); 582219820Sjeff return 0; 583219820Sjeff} 584219820Sjeff 585219820Sjeffstatic void 586219820Sjeffrip6_detach(struct socket *so) 587219820Sjeff{ 588219820Sjeff struct inpcb *inp; 589219820Sjeff 590219820Sjeff inp = sotoinpcb(so); 591219820Sjeff KASSERT(inp != NULL, ("rip6_detach: inp == NULL")); 592219820Sjeff 593219820Sjeff if (so == ip6_mrouter && ip6_mrouter_done) 594219820Sjeff ip6_mrouter_done(); 595219820Sjeff /* xxx: RSVP */ 596219820Sjeff INP_INFO_WLOCK(&ripcbinfo); 597219820Sjeff INP_LOCK(inp); 598219820Sjeff if (inp->in6p_icmp6filt) { 599219820Sjeff FREE(inp->in6p_icmp6filt, M_PCB); 600219820Sjeff inp->in6p_icmp6filt = NULL; 601219820Sjeff } 602219820Sjeff in6_pcbdetach(inp); 603219820Sjeff in6_pcbfree(inp); 604219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 605219820Sjeff} 606219820Sjeff 607219820Sjeff/* XXXRW: This can't ever be called. */ 608219820Sjeffstatic void 609219820Sjeffrip6_abort(struct socket *so) 610219820Sjeff{ 611219820Sjeff struct inpcb *inp; 612219820Sjeff 613219820Sjeff inp = sotoinpcb(so); 614219820Sjeff KASSERT(inp != NULL, ("rip6_abort: inp == NULL")); 615219820Sjeff 616219820Sjeff soisdisconnected(so); 617219820Sjeff} 618219820Sjeff 619219820Sjeffstatic void 620219820Sjeffrip6_close(struct socket *so) 621219820Sjeff{ 622219820Sjeff struct inpcb *inp; 623219820Sjeff 624219820Sjeff inp = sotoinpcb(so); 625219820Sjeff KASSERT(inp != NULL, ("rip6_close: inp == NULL")); 626219820Sjeff 627219820Sjeff soisdisconnected(so); 628219820Sjeff} 629219820Sjeff 630219820Sjeffstatic int 631219820Sjeffrip6_disconnect(struct socket *so) 632219820Sjeff{ 633219820Sjeff struct inpcb *inp = sotoinpcb(so); 634219820Sjeff 635219820Sjeff if ((so->so_state & SS_ISCONNECTED) == 0) 636219820Sjeff return ENOTCONN; 637219820Sjeff inp->in6p_faddr = in6addr_any; 638219820Sjeff rip6_abort(so); 639219820Sjeff return (0); 640219820Sjeff} 641219820Sjeff 642219820Sjeffstatic int 643219820Sjeffrip6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 644219820Sjeff{ 645219820Sjeff struct inpcb *inp = sotoinpcb(so); 646219820Sjeff struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 647219820Sjeff struct ifaddr *ia = NULL; 648219820Sjeff int error = 0; 649219820Sjeff 650219820Sjeff KASSERT(inp != NULL, ("rip6_bind: inp == NULL")); 651219820Sjeff if (nam->sa_len != sizeof(*addr)) 652219820Sjeff return EINVAL; 653219820Sjeff if (TAILQ_EMPTY(&ifnet) || addr->sin6_family != AF_INET6) 654219820Sjeff return EADDRNOTAVAIL; 655219820Sjeff if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 656219820Sjeff return(error); 657219820Sjeff 658219820Sjeff if (!IN6_IS_ADDR_UNSPECIFIED(&addr->sin6_addr) && 659219820Sjeff (ia = ifa_ifwithaddr((struct sockaddr *)addr)) == 0) 660219820Sjeff return EADDRNOTAVAIL; 661219820Sjeff if (ia && 662219820Sjeff ((struct in6_ifaddr *)ia)->ia6_flags & 663219820Sjeff (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 664219820Sjeff IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 665219820Sjeff return (EADDRNOTAVAIL); 666219820Sjeff } 667219820Sjeff INP_INFO_WLOCK(&ripcbinfo); 668219820Sjeff INP_LOCK(inp); 669219820Sjeff inp->in6p_laddr = addr->sin6_addr; 670219820Sjeff INP_UNLOCK(inp); 671219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 672219820Sjeff return 0; 673219820Sjeff} 674219820Sjeff 675219820Sjeffstatic int 676219820Sjeffrip6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 677219820Sjeff{ 678219820Sjeff struct inpcb *inp = sotoinpcb(so); 679219820Sjeff struct sockaddr_in6 *addr = (struct sockaddr_in6 *)nam; 680219820Sjeff struct in6_addr *in6a = NULL; 681219820Sjeff struct ifnet *ifp = NULL; 682219820Sjeff int error = 0, scope_ambiguous = 0; 683219820Sjeff 684219820Sjeff KASSERT(inp != NULL, ("rip6_connect: inp == NULL")); 685219820Sjeff if (nam->sa_len != sizeof(*addr)) 686219820Sjeff return EINVAL; 687219820Sjeff if (TAILQ_EMPTY(&ifnet)) 688219820Sjeff return EADDRNOTAVAIL; 689219820Sjeff if (addr->sin6_family != AF_INET6) 690219820Sjeff return EAFNOSUPPORT; 691219820Sjeff 692219820Sjeff /* 693219820Sjeff * Application should provide a proper zone ID or the use of 694219820Sjeff * default zone IDs should be enabled. Unfortunately, some 695219820Sjeff * applications do not behave as it should, so we need a 696219820Sjeff * workaround. Even if an appropriate ID is not determined, 697219820Sjeff * we'll see if we can determine the outgoing interface. If we 698219820Sjeff * can, determine the zone ID based on the interface below. 699219820Sjeff */ 700219820Sjeff if (addr->sin6_scope_id == 0 && !ip6_use_defzone) 701219820Sjeff scope_ambiguous = 1; 702219820Sjeff if ((error = sa6_embedscope(addr, ip6_use_defzone)) != 0) 703219820Sjeff return(error); 704219820Sjeff 705219820Sjeff INP_INFO_WLOCK(&ripcbinfo); 706219820Sjeff INP_LOCK(inp); 707219820Sjeff /* Source address selection. XXX: need pcblookup? */ 708219820Sjeff in6a = in6_selectsrc(addr, inp->in6p_outputopts, 709219820Sjeff inp->in6p_moptions, NULL, 710219820Sjeff &inp->in6p_laddr, &ifp, &error); 711219820Sjeff if (in6a == NULL) { 712219820Sjeff INP_UNLOCK(inp); 713219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 714219820Sjeff return (error ? error : EADDRNOTAVAIL); 715219820Sjeff } 716219820Sjeff 717219820Sjeff /* XXX: see above */ 718219820Sjeff if (ifp && scope_ambiguous && 719219820Sjeff (error = in6_setscope(&addr->sin6_addr, ifp, NULL)) != 0) { 720219820Sjeff INP_UNLOCK(inp); 721219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 722219820Sjeff return(error); 723219820Sjeff } 724219820Sjeff inp->in6p_faddr = addr->sin6_addr; 725219820Sjeff inp->in6p_laddr = *in6a; 726219820Sjeff soisconnected(so); 727219820Sjeff INP_UNLOCK(inp); 728219820Sjeff INP_INFO_WUNLOCK(&ripcbinfo); 729219820Sjeff return 0; 730219820Sjeff} 731219820Sjeff 732219820Sjeffstatic int 733219820Sjeffrip6_shutdown(struct socket *so) 734219820Sjeff{ 735219820Sjeff struct inpcb *inp; 736219820Sjeff 737219820Sjeff inp = sotoinpcb(so); 738219820Sjeff KASSERT(inp != NULL, ("rip6_shutdown: inp == NULL")); 739219820Sjeff INP_LOCK(inp); 740219820Sjeff socantsendmore(so); 741219820Sjeff INP_UNLOCK(inp); 742219820Sjeff return 0; 743219820Sjeff} 744219820Sjeff 745219820Sjeffstatic int 746219820Sjeffrip6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 747219820Sjeff struct mbuf *control, struct thread *td) 748219820Sjeff{ 749219820Sjeff struct inpcb *inp = sotoinpcb(so); 750219820Sjeff struct sockaddr_in6 tmp; 751219820Sjeff struct sockaddr_in6 *dst; 752219820Sjeff int ret; 753219820Sjeff 754219820Sjeff KASSERT(inp != NULL, ("rip6_send: inp == NULL")); 755219820Sjeff INP_INFO_WLOCK(&ripcbinfo); 756219820Sjeff /* always copy sockaddr to avoid overwrites */ 757219820Sjeff /* Unlocked read. */ 758219820Sjeff if (so->so_state & SS_ISCONNECTED) { 759 if (nam) { 760 INP_INFO_WUNLOCK(&ripcbinfo); 761 m_freem(m); 762 return EISCONN; 763 } 764 /* XXX */ 765 bzero(&tmp, sizeof(tmp)); 766 tmp.sin6_family = AF_INET6; 767 tmp.sin6_len = sizeof(struct sockaddr_in6); 768 bcopy(&inp->in6p_faddr, &tmp.sin6_addr, 769 sizeof(struct in6_addr)); 770 dst = &tmp; 771 } else { 772 if (nam == NULL) { 773 INP_INFO_WUNLOCK(&ripcbinfo); 774 m_freem(m); 775 return ENOTCONN; 776 } 777 if (nam->sa_len != sizeof(struct sockaddr_in6)) { 778 INP_INFO_WUNLOCK(&ripcbinfo); 779 m_freem(m); 780 return(EINVAL); 781 } 782 tmp = *(struct sockaddr_in6 *)nam; 783 dst = &tmp; 784 785 if (dst->sin6_family == AF_UNSPEC) { 786 /* 787 * XXX: we allow this case for backward 788 * compatibility to buggy applications that 789 * rely on old (and wrong) kernel behavior. 790 */ 791 log(LOG_INFO, "rip6 SEND: address family is " 792 "unspec. Assume AF_INET6\n"); 793 dst->sin6_family = AF_INET6; 794 } else if (dst->sin6_family != AF_INET6) { 795 INP_INFO_WUNLOCK(&ripcbinfo); 796 m_freem(m); 797 return(EAFNOSUPPORT); 798 } 799 } 800 ret = rip6_output(m, so, dst, control); 801 INP_INFO_WUNLOCK(&ripcbinfo); 802 return (ret); 803} 804 805struct pr_usrreqs rip6_usrreqs = { 806 .pru_abort = rip6_abort, 807 .pru_attach = rip6_attach, 808 .pru_bind = rip6_bind, 809 .pru_connect = rip6_connect, 810 .pru_control = in6_control, 811 .pru_detach = rip6_detach, 812 .pru_disconnect = rip6_disconnect, 813 .pru_peeraddr = in6_getpeeraddr, 814 .pru_send = rip6_send, 815 .pru_shutdown = rip6_shutdown, 816 .pru_sockaddr = in6_getsockaddr, 817 .pru_close = rip6_close, 818}; 819