in6_pcb.c revision 194777
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 * 29174510Sobrien * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ 3053541Sshin */ 3153541Sshin 32139826Simp/*- 3353541Sshin * Copyright (c) 1982, 1986, 1991, 1993 3453541Sshin * The Regents of the University of California. All rights reserved. 3553541Sshin * 3653541Sshin * Redistribution and use in source and binary forms, with or without 3753541Sshin * modification, are permitted provided that the following conditions 3853541Sshin * are met: 3953541Sshin * 1. Redistributions of source code must retain the above copyright 4053541Sshin * notice, this list of conditions and the following disclaimer. 4153541Sshin * 2. Redistributions in binary form must reproduce the above copyright 4253541Sshin * notice, this list of conditions and the following disclaimer in the 4353541Sshin * documentation and/or other materials provided with the distribution. 4453541Sshin * 4. Neither the name of the University nor the names of its contributors 4553541Sshin * may be used to endorse or promote products derived from this software 4653541Sshin * without specific prior written permission. 4753541Sshin * 4853541Sshin * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 4953541Sshin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5053541Sshin * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5153541Sshin * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5253541Sshin * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5353541Sshin * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5453541Sshin * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5553541Sshin * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5653541Sshin * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5753541Sshin * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5853541Sshin * SUCH DAMAGE. 5953541Sshin * 6053541Sshin * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 6153541Sshin */ 6253541Sshin 63174510Sobrien#include <sys/cdefs.h> 64174510Sobrien__FBSDID("$FreeBSD: head/sys/netinet6/in6_pcb.c 194777 2009-06-23 22:08:55Z bz $"); 65174510Sobrien 6678064Sume#include "opt_inet.h" 6778064Sume#include "opt_inet6.h" 6855009Sshin#include "opt_ipsec.h" 6953541Sshin 7053541Sshin#include <sys/param.h> 7153541Sshin#include <sys/systm.h> 7253541Sshin#include <sys/malloc.h> 7353541Sshin#include <sys/mbuf.h> 7455679Sshin#include <sys/domain.h> 7553541Sshin#include <sys/protosw.h> 7653541Sshin#include <sys/socket.h> 7753541Sshin#include <sys/socketvar.h> 7853541Sshin#include <sys/sockio.h> 7953541Sshin#include <sys/errno.h> 8053541Sshin#include <sys/time.h> 81164033Srwatson#include <sys/priv.h> 8253541Sshin#include <sys/proc.h> 8353541Sshin#include <sys/jail.h> 84181803Sbz#include <sys/vimage.h> 8553541Sshin 8692767Sjeff#include <vm/uma.h> 8753541Sshin 8853541Sshin#include <net/if.h> 8953541Sshin#include <net/if_types.h> 9053541Sshin#include <net/route.h> 9153541Sshin 9253541Sshin#include <netinet/in.h> 9353541Sshin#include <netinet/in_var.h> 9453541Sshin#include <netinet/in_systm.h> 9598102Shsu#include <netinet/tcp_var.h> 9662587Sitojun#include <netinet/ip6.h> 9755679Sshin#include <netinet/ip_var.h> 98185571Sbz#include <netinet/vinet.h> 99181887Sjulian 10053541Sshin#include <netinet6/ip6_var.h> 10153541Sshin#include <netinet6/nd6.h> 10253541Sshin#include <netinet/in_pcb.h> 10353541Sshin#include <netinet6/in6_pcb.h> 104148385Sume#include <netinet6/scope6_var.h> 105185571Sbz#include <netinet6/vinet6.h> 10653541Sshin 107174717Srwatson#include <security/mac/mac_framework.h> 108174717Srwatson 10953541Sshinstruct in6_addr zeroin6_addr; 11053541Sshin 11153541Sshinint 112171259Sdelphijin6_pcbbind(register struct inpcb *inp, struct sockaddr *nam, 113171259Sdelphij struct ucred *cred) 11453541Sshin{ 115183550Szec INIT_VNET_INET6(inp->inp_vnet); 116183550Szec INIT_VNET_INET(inp->inp_vnet); 11753541Sshin struct socket *so = inp->inp_socket; 11853541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 11953541Sshin struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 12053541Sshin u_short lport = 0; 121188144Sjamie int error, wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 12253541Sshin 123132714Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 124178285Srwatson INP_WLOCK_ASSERT(inp); 125132714Srwatson 126181803Sbz if (!V_in6_ifaddr) /* XXX broken! */ 12753541Sshin return (EADDRNOTAVAIL); 12853541Sshin if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 129120856Sume return (EINVAL); 13053541Sshin if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 131160024Sbz wild = INPLOOKUP_WILDCARD; 132188148Sjamie if (nam == NULL) { 133188148Sjamie if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 134188148Sjamie ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 135188148Sjamie return (error); 136188148Sjamie } else { 13753541Sshin sin6 = (struct sockaddr_in6 *)nam; 13853541Sshin if (nam->sa_len != sizeof(*sin6)) 139120856Sume return (EINVAL); 14053541Sshin /* 14153541Sshin * family check. 14253541Sshin */ 14353541Sshin if (nam->sa_family != AF_INET6) 144120856Sume return (EAFNOSUPPORT); 14553541Sshin 146181803Sbz if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 147148385Sume return(error); 14853541Sshin 149188144Sjamie if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 150188144Sjamie ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 151188144Sjamie return (error); 152185435Sbz 15353541Sshin lport = sin6->sin6_port; 15453541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 15553541Sshin /* 15653541Sshin * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 15753541Sshin * allow compepte duplication of binding if 15853541Sshin * SO_REUSEPORT is set, or if SO_REUSEADDR is set 15953541Sshin * and a multicast address is bound on both 16053541Sshin * new and duplicated sockets. 16153541Sshin */ 16253541Sshin if (so->so_options & SO_REUSEADDR) 16353541Sshin reuseport = SO_REUSEADDR|SO_REUSEPORT; 16453541Sshin } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 165194760Srwatson struct ifaddr *ifa; 16653541Sshin 16753541Sshin sin6->sin6_port = 0; /* yech... */ 168194760Srwatson if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 169194760Srwatson NULL && 170193217Spjd (inp->inp_flags & INP_BINDANY) == 0) { 171120856Sume return (EADDRNOTAVAIL); 172193217Spjd } 17353541Sshin 17453541Sshin /* 17553541Sshin * XXX: bind to an anycast address might accidentally 17653541Sshin * cause sending a packet with anycast source address. 17778064Sume * We should allow to bind to a deprecated address, since 178120913Sume * the application dares to use it. 17953541Sshin */ 180194760Srwatson if (ifa != NULL && 181194760Srwatson ((struct in6_ifaddr *)ifa)->ia6_flags & 18278064Sume (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 183194760Srwatson ifa_free(ifa); 184120856Sume return (EADDRNOTAVAIL); 18553541Sshin } 186194760Srwatson if (ifa != NULL) 187194760Srwatson ifa_free(ifa); 18853541Sshin } 18953541Sshin if (lport) { 19053541Sshin struct inpcb *t; 19153541Sshin 19253541Sshin /* GROSS */ 193181803Sbz if (ntohs(lport) <= V_ipport_reservedhigh && 194181803Sbz ntohs(lport) >= V_ipport_reservedlow && 195164033Srwatson priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 196170587Srwatson 0)) 197120856Sume return (EACCES); 198159976Spjd if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 199183606Sbz priv_check_cred(inp->inp_cred, 200170587Srwatson PRIV_NETINET_REUSEPORT, 0) != 0) { 20155679Sshin t = in6_pcblookup_local(pcbinfo, 20253541Sshin &sin6->sin6_addr, lport, 203180427Sbz INPLOOKUP_WILDCARD, cred); 204132699Syar if (t && 205189848Srwatson ((t->inp_flags & INP_TIMEWAIT) == 0) && 206132699Syar (so->so_type != SOCK_STREAM || 207132699Syar IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 20897658Stanimura (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 209171260Sdelphij !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 210171260Sdelphij (t->inp_socket->so_options & SO_REUSEPORT) 211183606Sbz == 0) && (inp->inp_cred->cr_uid != 212183606Sbz t->inp_cred->cr_uid)) 21397658Stanimura return (EADDRINUSE); 21478064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 21555679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 21655679Sshin struct sockaddr_in sin; 21755679Sshin 21855679Sshin in6_sin6_2_sin(&sin, sin6); 21955679Sshin t = in_pcblookup_local(pcbinfo, 220180427Sbz sin.sin_addr, lport, 221180427Sbz INPLOOKUP_WILDCARD, cred); 222132699Syar if (t && 223189848Srwatson ((t->inp_flags & 224132699Syar INP_TIMEWAIT) == 0) && 225132699Syar (so->so_type != SOCK_STREAM || 226132699Syar ntohl(t->inp_faddr.s_addr) == 227132699Syar INADDR_ANY) && 228183606Sbz (inp->inp_cred->cr_uid != 229183606Sbz t->inp_cred->cr_uid)) 23055679Sshin return (EADDRINUSE); 23155679Sshin } 23253541Sshin } 23353541Sshin t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 234180427Sbz lport, wild, cred); 235189848Srwatson if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ? 236171260Sdelphij intotw(t)->tw_so_options : 237116453Scognet t->inp_socket->so_options)) == 0) 238120856Sume return (EADDRINUSE); 23978064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 24055679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 24155679Sshin struct sockaddr_in sin; 24255679Sshin 24355679Sshin in6_sin6_2_sin(&sin, sin6); 24455679Sshin t = in_pcblookup_local(pcbinfo, sin.sin_addr, 245180427Sbz lport, wild, cred); 246189848Srwatson if (t && t->inp_flags & INP_TIMEWAIT) { 247171260Sdelphij if ((reuseport & 248116453Scognet intotw(t)->tw_so_options) == 0 && 249116453Scognet (ntohl(t->inp_laddr.s_addr) != 250171260Sdelphij INADDR_ANY || ((inp->inp_vflag & 251171260Sdelphij INP_IPV6PROTO) == 252116453Scognet (t->inp_vflag & INP_IPV6PROTO)))) 253116453Scognet return (EADDRINUSE); 254116453Scognet } 255171260Sdelphij else if (t && 256171260Sdelphij (reuseport & t->inp_socket->so_options) 257171260Sdelphij == 0 && (ntohl(t->inp_laddr.s_addr) != 258116453Scognet INADDR_ANY || INP_SOCKAF(so) == 25997658Stanimura INP_SOCKAF(t->inp_socket))) 26097658Stanimura return (EADDRINUSE); 26155679Sshin } 26253541Sshin } 26353541Sshin inp->in6p_laddr = sin6->sin6_addr; 26453541Sshin } 26553541Sshin if (lport == 0) { 266188144Sjamie if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 267188144Sjamie return (error); 268183611Sbz } else { 26962587Sitojun inp->inp_lport = lport; 27062587Sitojun if (in_pcbinshash(inp) != 0) { 27162587Sitojun inp->in6p_laddr = in6addr_any; 27262587Sitojun inp->inp_lport = 0; 27362587Sitojun return (EAGAIN); 27453541Sshin } 27553541Sshin } 276120856Sume return (0); 27753541Sshin} 27853541Sshin 27953541Sshin/* 28053541Sshin * Transform old in6_pcbconnect() into an inner subroutine for new 28153541Sshin * in6_pcbconnect(): Do some validity-checking on the remote 28253541Sshin * address (in mbuf 'nam') and then determine local host address 28353541Sshin * (i.e., which interface) to use to access that remote host. 28453541Sshin * 28553541Sshin * This preserves definition of in6_pcbconnect(), while supporting a 28653541Sshin * slightly different version for T/TCP. (This is more than 28753541Sshin * a bit of a kludge, but cleaning up the internal interfaces would 28853541Sshin * have forced minor changes in every protocol). 28953541Sshin */ 29053541Sshinint 291171259Sdelphijin6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 292194777Sbz struct in6_addr *plocal_addr6) 29353541Sshin{ 294183550Szec INIT_VNET_INET6(inp->inp_vnet); 29553541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 296148385Sume int error = 0; 29753541Sshin struct ifnet *ifp = NULL; 298148385Sume int scope_ambiguous = 0; 299194777Sbz struct in6_addr in6a; 30053541Sshin 301158011Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 302178285Srwatson INP_WLOCK_ASSERT(inp); 303158011Srwatson 30453541Sshin if (nam->sa_len != sizeof (*sin6)) 30553541Sshin return (EINVAL); 30653541Sshin if (sin6->sin6_family != AF_INET6) 30753541Sshin return (EAFNOSUPPORT); 30853541Sshin if (sin6->sin6_port == 0) 30953541Sshin return (EADDRNOTAVAIL); 31053541Sshin 311181803Sbz if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 312148385Sume scope_ambiguous = 1; 313181803Sbz if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 314148385Sume return(error); 315148385Sume 316181803Sbz if (V_in6_ifaddr) { 31753541Sshin /* 31853541Sshin * If the destination address is UNSPECIFIED addr, 31953541Sshin * use the loopback addr, e.g ::1. 32053541Sshin */ 32153541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 32253541Sshin sin6->sin6_addr = in6addr_loopback; 32353541Sshin } 324188144Sjamie if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 325188144Sjamie return (error); 326148385Sume 327194777Sbz error = in6_selectsrc(sin6, inp->in6p_outputopts, 328194777Sbz inp, NULL, inp->inp_cred, &ifp, &in6a); 329194777Sbz if (error) 330194777Sbz return (error); 331194777Sbz 332148385Sume if (ifp && scope_ambiguous && 333148385Sume (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 334148385Sume return(error); 33553541Sshin } 336148385Sume 337148385Sume /* 338194777Sbz * Do not update this earlier, in case we return with an error. 339194777Sbz * 340194777Sbz * XXX: this in6_selectsrc result might replace the bound local 341194777Sbz * aaddress with the address specified by setsockopt(IPV6_PKTINFO). 342194777Sbz * Is it the intended behavior? 343194777Sbz */ 344194777Sbz *plocal_addr6 = in6a; 345194777Sbz 346194777Sbz /* 347148385Sume * Don't do pcblookup call here; return interface in 348148385Sume * plocal_addr6 349148385Sume * and exit to caller, that will do the lookup. 350148385Sume */ 351148385Sume 352120856Sume return (0); 35353541Sshin} 35453541Sshin 35553541Sshin/* 35653541Sshin * Outer subroutine: 35753541Sshin * Connect from a socket to a specified address. 35853541Sshin * Both address and port must be specified in argument sin. 35953541Sshin * If don't have a local address for this socket yet, 36053541Sshin * then pick one. 36153541Sshin */ 36253541Sshinint 363171259Sdelphijin6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 364171259Sdelphij struct ucred *cred) 36553541Sshin{ 36653541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 367194777Sbz struct in6_addr addr6; 36853541Sshin int error; 36953541Sshin 370132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 371178285Srwatson INP_WLOCK_ASSERT(inp); 372132714Srwatson 37353541Sshin /* 37495023Ssuz * Call inner routine, to assign local interface address. 37595023Ssuz * in6_pcbladdr() may automatically fill in sin6_scope_id. 37653541Sshin */ 37753541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 378120856Sume return (error); 37953541Sshin 38053541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 38153541Sshin sin6->sin6_port, 38253541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 383194777Sbz ? &addr6 : &inp->in6p_laddr, 38453541Sshin inp->inp_lport, 0, NULL) != NULL) { 38553541Sshin return (EADDRINUSE); 38653541Sshin } 38753541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 38853541Sshin if (inp->inp_lport == 0) { 389127505Spjd error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 39053541Sshin if (error) 39153541Sshin return (error); 39253541Sshin } 393194777Sbz inp->in6p_laddr = addr6; 39453541Sshin } 39553541Sshin inp->in6p_faddr = sin6->sin6_addr; 39653541Sshin inp->inp_fport = sin6->sin6_port; 39778064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 398186141Sbz inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 399186141Sbz if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 400186141Sbz inp->inp_flow |= 401120649Sume (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 40253541Sshin 40353541Sshin in_pcbrehash(inp); 404171133Sgnn 40553541Sshin return (0); 40653541Sshin} 40753541Sshin 40853541Sshinvoid 409171259Sdelphijin6_pcbdisconnect(struct inpcb *inp) 41053541Sshin{ 411132714Srwatson 412132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 413178285Srwatson INP_WLOCK_ASSERT(inp); 414132714Srwatson 41553541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 41653541Sshin inp->inp_fport = 0; 41778064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 418186141Sbz inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 41953541Sshin in_pcbrehash(inp); 42053541Sshin} 42153541Sshin 422102218Struckmanstruct sockaddr * 423171259Sdelphijin6_sockaddr(in_port_t port, struct in6_addr *addr_p) 424102218Struckman{ 425102218Struckman struct sockaddr_in6 *sin6; 426102218Struckman 427184205Sdes sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 428102218Struckman bzero(sin6, sizeof *sin6); 429102218Struckman sin6->sin6_family = AF_INET6; 430102218Struckman sin6->sin6_len = sizeof(*sin6); 431102218Struckman sin6->sin6_port = port; 432102218Struckman sin6->sin6_addr = *addr_p; 433148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 434102218Struckman 435102218Struckman return (struct sockaddr *)sin6; 436102218Struckman} 437102218Struckman 438102218Struckmanstruct sockaddr * 439171259Sdelphijin6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 440102218Struckman{ 441102218Struckman struct sockaddr_in sin; 442102218Struckman struct sockaddr_in6 *sin6_p; 443102218Struckman 444102218Struckman bzero(&sin, sizeof sin); 445102218Struckman sin.sin_family = AF_INET; 446102218Struckman sin.sin_len = sizeof(sin); 447102218Struckman sin.sin_port = port; 448102218Struckman sin.sin_addr = *addr_p; 449102218Struckman 450184205Sdes sin6_p = malloc(sizeof *sin6_p, M_SONAME, 451111119Simp M_WAITOK); 452102218Struckman in6_sin_2_v4mapsin6(&sin, sin6_p); 453102218Struckman 454102218Struckman return (struct sockaddr *)sin6_p; 455102218Struckman} 456102218Struckman 45753541Sshinint 458171259Sdelphijin6_getsockaddr(struct socket *so, struct sockaddr **nam) 45953541Sshin{ 46053541Sshin register struct inpcb *inp; 461102218Struckman struct in6_addr addr; 462102218Struckman in_port_t port; 46353541Sshin 46453541Sshin inp = sotoinpcb(so); 465169462Srwatson KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 466157673Srwatson 467178320Srwatson INP_RLOCK(inp); 468102218Struckman port = inp->inp_lport; 469102218Struckman addr = inp->in6p_laddr; 470178320Srwatson INP_RUNLOCK(inp); 47153541Sshin 472102218Struckman *nam = in6_sockaddr(port, &addr); 47353541Sshin return 0; 47453541Sshin} 47553541Sshin 47653541Sshinint 477171259Sdelphijin6_getpeeraddr(struct socket *so, struct sockaddr **nam) 47853541Sshin{ 47953541Sshin struct inpcb *inp; 480102218Struckman struct in6_addr addr; 481102218Struckman in_port_t port; 48253541Sshin 48353541Sshin inp = sotoinpcb(so); 484169462Srwatson KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 485157673Srwatson 486178320Srwatson INP_RLOCK(inp); 487102218Struckman port = inp->inp_fport; 488102218Struckman addr = inp->in6p_faddr; 489178320Srwatson INP_RUNLOCK(inp); 49053541Sshin 491102218Struckman *nam = in6_sockaddr(port, &addr); 49253541Sshin return 0; 49353541Sshin} 49453541Sshin 49553541Sshinint 49653541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 49753541Sshin{ 498157673Srwatson struct inpcb *inp; 49953541Sshin int error; 50053541Sshin 501157673Srwatson inp = sotoinpcb(so); 502157673Srwatson KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 503157673Srwatson 504124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 505169462Srwatson error = in_getsockaddr(so, nam); 50654952Seivind if (error == 0) 50753541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 508120913Sume } else { 509169462Srwatson /* scope issues will be handled in in6_getsockaddr(). */ 510169462Srwatson error = in6_getsockaddr(so, nam); 511120913Sume } 51253541Sshin 51353541Sshin return error; 51453541Sshin} 51553541Sshin 51653541Sshinint 51753541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 51853541Sshin{ 519157673Srwatson struct inpcb *inp; 52053541Sshin int error; 52153541Sshin 522157673Srwatson inp = sotoinpcb(so); 523157673Srwatson KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 524157673Srwatson 525124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 526169462Srwatson error = in_getpeeraddr(so, nam); 52754952Seivind if (error == 0) 52853541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 52953541Sshin } else 530169462Srwatson /* scope issues will be handled in in6_getpeeraddr(). */ 531169462Srwatson error = in6_getpeeraddr(so, nam); 53253541Sshin 53353541Sshin return error; 53453541Sshin} 53553541Sshin 53653541Sshin/* 53753541Sshin * Pass some notification to all connections of a protocol 53853541Sshin * associated with address dst. The local address and/or port numbers 53953541Sshin * may be specified to limit the search. The "usual action" will be 54053541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 54153541Sshin * cmds that are uninteresting (e.g., no error in the map). 54253541Sshin * Call the protocol specific routine (if any) to report 54353541Sshin * any errors for each matching socket. 54453541Sshin */ 54553541Sshinvoid 546171259Sdelphijin6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 547171259Sdelphij u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 548171259Sdelphij int cmd, void *cmdarg, 549175162Sobrien struct inpcb *(*notify)(struct inpcb *, int)) 55053541Sshin{ 551177961Srwatson struct inpcb *inp, *inp_temp; 55278064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 55353541Sshin u_short fport = fport_arg, lport = lport_arg; 55478064Sume u_int32_t flowinfo; 555157673Srwatson int errno; 55653541Sshin 557119995Sru if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 55853541Sshin return; 55978064Sume 56078064Sume sa6_dst = (struct sockaddr_in6 *)dst; 56178064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 56253541Sshin return; 56353541Sshin 56453541Sshin /* 56578064Sume * note that src can be NULL when we get notify by local fragmentation. 56678064Sume */ 56791346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 56878064Sume flowinfo = sa6_src.sin6_flowinfo; 56978064Sume 57078064Sume /* 57153541Sshin * Redirects go to all references to the destination, 57262587Sitojun * and use in6_rtchange to invalidate the route cache. 57362587Sitojun * Dead host indications: also use in6_rtchange to invalidate 57462587Sitojun * the cache, and deliver the error to all the sockets. 57553541Sshin * Otherwise, if we have knowledge of the local port and address, 57653541Sshin * deliver only to that socket. 57753541Sshin */ 57853541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 57953541Sshin fport = 0; 58053541Sshin lport = 0; 58178064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 58262587Sitojun 58378064Sume if (cmd != PRC_HOSTDEAD) 58478064Sume notify = in6_rtchange; 58553541Sshin } 58653541Sshin errno = inet6ctlerrmap[cmd]; 587133192Srwatson INP_INFO_WLOCK(pcbinfo); 588177961Srwatson LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 589178285Srwatson INP_WLOCK(inp); 590171260Sdelphij if ((inp->inp_vflag & INP_IPV6) == 0) { 591178285Srwatson INP_WUNLOCK(inp); 59253541Sshin continue; 593133192Srwatson } 59462587Sitojun 59578064Sume /* 596125776Sume * If the error designates a new path MTU for a destination 597125776Sume * and the application (associated with this socket) wanted to 598125776Sume * know the value, notify. Note that we notify for all 599125776Sume * disconnected sockets if the corresponding application 600125776Sume * wanted. This is because some UDP applications keep sending 601125776Sume * sockets disconnected. 602125776Sume * XXX: should we avoid to notify the value to TCP sockets? 603125776Sume */ 604125776Sume if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 605125776Sume (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 606125776Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 607125776Sume ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 608125776Sume (u_int32_t *)cmdarg); 609125776Sume } 610125776Sume 611125776Sume /* 61278064Sume * Detect if we should notify the error. If no source and 61378064Sume * destination ports are specifed, but non-zero flowinfo and 61478064Sume * local address match, notify the error. This is the case 61578064Sume * when the error is delivered with an encrypted buffer 61678064Sume * by ESP. Otherwise, just compare addresses and ports 61778064Sume * as usual. 61878064Sume */ 61978064Sume if (lport == 0 && fport == 0 && flowinfo && 62078064Sume inp->inp_socket != NULL && 621186141Sbz flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 62278064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 62378064Sume goto do_notify; 62478064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 62578064Sume &sa6_dst->sin6_addr) || 62678064Sume inp->inp_socket == 0 || 62778064Sume (lport && inp->inp_lport != lport) || 62878064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 62978064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 63078064Sume &sa6_src.sin6_addr)) || 631133192Srwatson (fport && inp->inp_fport != fport)) { 632178285Srwatson INP_WUNLOCK(inp); 63353541Sshin continue; 634133192Srwatson } 63562587Sitojun 63678064Sume do_notify: 637134121Srwatson if (notify) { 638134121Srwatson if ((*notify)(inp, errno)) 639178285Srwatson INP_WUNLOCK(inp); 640134121Srwatson } else 641178285Srwatson INP_WUNLOCK(inp); 64253541Sshin } 643133192Srwatson INP_INFO_WUNLOCK(pcbinfo); 64453541Sshin} 64553541Sshin 64653541Sshin/* 64753541Sshin * Lookup a PCB based on the local address and port. 64853541Sshin */ 64953541Sshinstruct inpcb * 650171259Sdelphijin6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 651180427Sbz u_short lport, int wild_okay, struct ucred *cred) 65253541Sshin{ 65353541Sshin register struct inpcb *inp; 65453541Sshin int matchwild = 3, wildcard; 65553541Sshin 656158011Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 657158011Srwatson 65853541Sshin if (!wild_okay) { 65953541Sshin struct inpcbhead *head; 66053541Sshin /* 66153541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 66253541Sshin * matches the local address and port we're looking for. 66353541Sshin */ 664169154Srwatson head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 665169154Srwatson 0, pcbinfo->ipi_hashmask)]; 66653541Sshin LIST_FOREACH(inp, head, inp_hash) { 667185435Sbz /* XXX inp locking */ 66854952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 66953541Sshin continue; 67053541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 67153541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 67253541Sshin inp->inp_lport == lport) { 673185435Sbz /* Found. */ 674185435Sbz if (cred == NULL || 675192895Sjamie prison_equal_ip6(cred->cr_prison, 676192895Sjamie inp->inp_cred->cr_prison)) 677185435Sbz return (inp); 67853541Sshin } 67953541Sshin } 68053541Sshin /* 68153541Sshin * Not found. 68253541Sshin */ 68353541Sshin return (NULL); 68453541Sshin } else { 68553541Sshin struct inpcbporthead *porthash; 68653541Sshin struct inpcbport *phd; 68753541Sshin struct inpcb *match = NULL; 68853541Sshin /* 68953541Sshin * Best fit PCB lookup. 69053541Sshin * 69153541Sshin * First see if this local port is in use by looking on the 69253541Sshin * port hash list. 69353541Sshin */ 694169154Srwatson porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 695169154Srwatson pcbinfo->ipi_porthashmask)]; 69653541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 69753541Sshin if (phd->phd_port == lport) 69853541Sshin break; 69953541Sshin } 70053541Sshin if (phd != NULL) { 70153541Sshin /* 70253541Sshin * Port is in use by one or more PCBs. Look for best 70353541Sshin * fit. 70453541Sshin */ 70553541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 70653541Sshin wildcard = 0; 707185435Sbz if (cred != NULL && 708192895Sjamie !prison_equal_ip6(cred->cr_prison, 709192895Sjamie inp->inp_cred->cr_prison)) 710185435Sbz continue; 711185435Sbz /* XXX inp locking */ 71254952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 71353541Sshin continue; 71453541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 71553541Sshin wildcard++; 71653541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 71753541Sshin &inp->in6p_laddr)) { 71853541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 71953541Sshin wildcard++; 72053541Sshin else if (!IN6_ARE_ADDR_EQUAL( 721185435Sbz &inp->in6p_laddr, laddr)) 72253541Sshin continue; 72353541Sshin } else { 72453541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 72553541Sshin wildcard++; 72653541Sshin } 72753541Sshin if (wildcard < matchwild) { 72853541Sshin match = inp; 72953541Sshin matchwild = wildcard; 730185435Sbz if (matchwild == 0) 73153541Sshin break; 73253541Sshin } 73353541Sshin } 73453541Sshin } 73553541Sshin return (match); 73653541Sshin } 73753541Sshin} 73853541Sshin 73981127Sumevoid 740171259Sdelphijin6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 74181127Sume{ 742186141Sbz struct inpcb *in6p; 74381127Sume struct ip6_moptions *im6o; 744191672Sbms int i, gap; 74581127Sume 746157978Srwatson INP_INFO_RLOCK(pcbinfo); 747169154Srwatson LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 748178285Srwatson INP_WLOCK(in6p); 74981127Sume im6o = in6p->in6p_moptions; 750191672Sbms if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) { 75181127Sume /* 752191672Sbms * Unselect the outgoing ifp for multicast if it 753191672Sbms * is being detached. 75481127Sume */ 75581127Sume if (im6o->im6o_multicast_ifp == ifp) 75681127Sume im6o->im6o_multicast_ifp = NULL; 75781127Sume /* 75881127Sume * Drop multicast group membership if we joined 75981127Sume * through the interface being detached. 76081127Sume */ 761191672Sbms gap = 0; 762191672Sbms for (i = 0; i < im6o->im6o_num_memberships; i++) { 763191672Sbms if (im6o->im6o_membership[i]->in6m_ifp == 764191672Sbms ifp) { 765191672Sbms in6_mc_leave(im6o->im6o_membership[i], 766191672Sbms NULL); 767191672Sbms gap++; 768191672Sbms } else if (gap != 0) { 769191672Sbms im6o->im6o_membership[i - gap] = 770191672Sbms im6o->im6o_membership[i]; 77181127Sume } 77281127Sume } 773191672Sbms im6o->im6o_num_memberships -= gap; 77481127Sume } 775178285Srwatson INP_WUNLOCK(in6p); 77681127Sume } 777157978Srwatson INP_INFO_RUNLOCK(pcbinfo); 77881127Sume} 77981127Sume 78053541Sshin/* 78153541Sshin * Check for alternatives when higher level complains 78253541Sshin * about service problems. For now, invalidate cached 78353541Sshin * routing information. If the route was created dynamically 78453541Sshin * (by a redirect), time to try a default gateway again. 78553541Sshin */ 78653541Sshinvoid 787171259Sdelphijin6_losing(struct inpcb *in6p) 78853541Sshin{ 789171259Sdelphij 790122922Sandre /* 791122922Sandre * We don't store route pointers in the routing table anymore 792122922Sandre */ 793122922Sandre return; 79453541Sshin} 79553541Sshin 79653541Sshin/* 79753541Sshin * After a routing change, flush old routing 79853541Sshin * and allocate a (hopefully) better one. 79953541Sshin */ 80098211Shsustruct inpcb * 801171259Sdelphijin6_rtchange(struct inpcb *inp, int errno) 80253541Sshin{ 803122922Sandre /* 804122922Sandre * We don't store route pointers in the routing table anymore 805122922Sandre */ 80698211Shsu return inp; 80753541Sshin} 80853541Sshin 80953541Sshin/* 81053541Sshin * Lookup PCB in hash list. 81153541Sshin */ 81253541Sshinstruct inpcb * 813171259Sdelphijin6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 814185435Sbz u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard, 815185435Sbz struct ifnet *ifp) 81653541Sshin{ 81753541Sshin struct inpcbhead *head; 818185435Sbz struct inpcb *inp, *tmpinp; 81953541Sshin u_short fport = fport_arg, lport = lport_arg; 82078064Sume int faith; 82153541Sshin 822178285Srwatson INP_INFO_LOCK_ASSERT(pcbinfo); 823158011Srwatson 82483934Sbrooks if (faithprefix_p != NULL) 82583934Sbrooks faith = (*faithprefix_p)(laddr); 82683934Sbrooks else 82783934Sbrooks faith = 0; 82878064Sume 82953541Sshin /* 83053541Sshin * First look for an exact match. 83153541Sshin */ 832185435Sbz tmpinp = NULL; 833169154Srwatson head = &pcbinfo->ipi_hashbase[ 834169154Srwatson INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 835169154Srwatson pcbinfo->ipi_hashmask)]; 83654263Sshin LIST_FOREACH(inp, head, inp_hash) { 837185435Sbz /* XXX inp locking */ 83854952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 83953541Sshin continue; 84053541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 84153541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 84253541Sshin inp->inp_fport == fport && 84353541Sshin inp->inp_lport == lport) { 84453541Sshin /* 845185435Sbz * XXX We should be able to directly return 846185435Sbz * the inp here, without any checks. 847185435Sbz * Well unless both bound with SO_REUSEPORT? 84853541Sshin */ 849192895Sjamie if (prison_flag(inp->inp_cred, PR_IP6)) 850185435Sbz return (inp); 851185435Sbz if (tmpinp == NULL) 852185435Sbz tmpinp = inp; 85353541Sshin } 85453541Sshin } 855185435Sbz if (tmpinp != NULL) 856185435Sbz return (tmpinp); 85753541Sshin 858185435Sbz /* 859185435Sbz * Then look for a wildcard match, if requested. 860185435Sbz */ 861185435Sbz if (wildcard == INPLOOKUP_WILDCARD) { 862185435Sbz struct inpcb *local_wild = NULL, *local_exact = NULL; 863185435Sbz struct inpcb *jail_wild = NULL; 864185435Sbz int injail; 865185435Sbz 866185435Sbz /* 867185435Sbz * Order of socket selection - we always prefer jails. 868185435Sbz * 1. jailed, non-wild. 869185435Sbz * 2. jailed, wild. 870185435Sbz * 3. non-jailed, non-wild. 871185435Sbz * 4. non-jailed, wild. 872185435Sbz */ 873169154Srwatson head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 874169154Srwatson 0, pcbinfo->ipi_hashmask)]; 87554263Sshin LIST_FOREACH(inp, head, inp_hash) { 876185435Sbz /* XXX inp locking */ 87754952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 87853541Sshin continue; 879185435Sbz 880185435Sbz if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 881185435Sbz inp->inp_lport != lport) { 882185435Sbz continue; 883185435Sbz } 884185435Sbz 885185435Sbz /* XXX inp locking */ 886185435Sbz if (faith && (inp->inp_flags & INP_FAITH) == 0) 887185435Sbz continue; 888185435Sbz 889192895Sjamie injail = prison_flag(inp->inp_cred, PR_IP6); 890185435Sbz if (injail) { 891188144Sjamie if (prison_check_ip6(inp->inp_cred, 892188144Sjamie laddr) != 0) 89353541Sshin continue; 894185435Sbz } else { 895185435Sbz if (local_exact != NULL) 896185435Sbz continue; 897185435Sbz } 898185435Sbz 899185435Sbz if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 900185435Sbz if (injail) 90153541Sshin return (inp); 902185435Sbz else 903185435Sbz local_exact = inp; 904185435Sbz } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 905185435Sbz if (injail) 906185435Sbz jail_wild = inp; 907185435Sbz else 90853541Sshin local_wild = inp; 90953541Sshin } 910185435Sbz } /* LIST_FOREACH */ 91153541Sshin 912185435Sbz if (jail_wild != NULL) 913185435Sbz return (jail_wild); 914185435Sbz if (local_exact != NULL) 915185435Sbz return (local_exact); 916185435Sbz if (local_wild != NULL) 917185435Sbz return (local_wild); 918185435Sbz } /* if (wildcard == INPLOOKUP_WILDCARD) */ 919185435Sbz 92053541Sshin /* 92153541Sshin * Not found. 92253541Sshin */ 92353541Sshin return (NULL); 92453541Sshin} 92553541Sshin 92653541Sshinvoid 92753541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 92853541Sshin{ 92953541Sshin struct ip6_hdr *ip; 93053541Sshin 93153541Sshin ip = mtod(m, struct ip6_hdr *); 93253541Sshin bzero(sin6, sizeof(*sin6)); 93353541Sshin sin6->sin6_len = sizeof(*sin6); 93453541Sshin sin6->sin6_family = AF_INET6; 93553541Sshin sin6->sin6_addr = ip->ip6_src; 93653541Sshin 937148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 938148385Sume 93953541Sshin return; 94053541Sshin} 941