in6_pcb.c revision 202915
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 202915 2010-01-24 10:22:39Z 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> 8453541Sshin 8592767Sjeff#include <vm/uma.h> 8653541Sshin 8753541Sshin#include <net/if.h> 8853541Sshin#include <net/if_types.h> 8953541Sshin#include <net/route.h> 9053541Sshin 9153541Sshin#include <netinet/in.h> 9253541Sshin#include <netinet/in_var.h> 9353541Sshin#include <netinet/in_systm.h> 9498102Shsu#include <netinet/tcp_var.h> 9562587Sitojun#include <netinet/ip6.h> 9655679Sshin#include <netinet/ip_var.h> 97181887Sjulian 9853541Sshin#include <netinet6/ip6_var.h> 9953541Sshin#include <netinet6/nd6.h> 10053541Sshin#include <netinet/in_pcb.h> 10153541Sshin#include <netinet6/in6_pcb.h> 102148385Sume#include <netinet6/scope6_var.h> 10353541Sshin 104174717Srwatson#include <security/mac/mac_framework.h> 105174717Srwatson 10653541Sshinstruct in6_addr zeroin6_addr; 10753541Sshin 10853541Sshinint 109171259Sdelphijin6_pcbbind(register struct inpcb *inp, struct sockaddr *nam, 110171259Sdelphij struct ucred *cred) 11153541Sshin{ 11253541Sshin struct socket *so = inp->inp_socket; 11353541Sshin struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 11453541Sshin struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 11553541Sshin u_short lport = 0; 116188144Sjamie int error, wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 11753541Sshin 118132714Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 119178285Srwatson INP_WLOCK_ASSERT(inp); 120132714Srwatson 121194907Srwatson if (TAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */ 12253541Sshin return (EADDRNOTAVAIL); 12353541Sshin if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 124120856Sume return (EINVAL); 12553541Sshin if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 126160024Sbz wild = INPLOOKUP_WILDCARD; 127188148Sjamie if (nam == NULL) { 128188148Sjamie if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 129188148Sjamie ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 130188148Sjamie return (error); 131188148Sjamie } else { 13253541Sshin sin6 = (struct sockaddr_in6 *)nam; 13353541Sshin if (nam->sa_len != sizeof(*sin6)) 134120856Sume return (EINVAL); 13553541Sshin /* 13653541Sshin * family check. 13753541Sshin */ 13853541Sshin if (nam->sa_family != AF_INET6) 139120856Sume return (EAFNOSUPPORT); 14053541Sshin 141181803Sbz if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 142148385Sume return(error); 14353541Sshin 144188144Sjamie if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 145188144Sjamie ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 146188144Sjamie return (error); 147185435Sbz 14853541Sshin lport = sin6->sin6_port; 14953541Sshin if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 15053541Sshin /* 15153541Sshin * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 15253541Sshin * allow compepte duplication of binding if 15353541Sshin * SO_REUSEPORT is set, or if SO_REUSEADDR is set 15453541Sshin * and a multicast address is bound on both 15553541Sshin * new and duplicated sockets. 15653541Sshin */ 15753541Sshin if (so->so_options & SO_REUSEADDR) 15853541Sshin reuseport = SO_REUSEADDR|SO_REUSEPORT; 15953541Sshin } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 160194760Srwatson struct ifaddr *ifa; 16153541Sshin 16253541Sshin sin6->sin6_port = 0; /* yech... */ 163194760Srwatson if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 164194760Srwatson NULL && 165193217Spjd (inp->inp_flags & INP_BINDANY) == 0) { 166120856Sume return (EADDRNOTAVAIL); 167193217Spjd } 16853541Sshin 16953541Sshin /* 17053541Sshin * XXX: bind to an anycast address might accidentally 17153541Sshin * cause sending a packet with anycast source address. 17278064Sume * We should allow to bind to a deprecated address, since 173120913Sume * the application dares to use it. 17453541Sshin */ 175194760Srwatson if (ifa != NULL && 176194760Srwatson ((struct in6_ifaddr *)ifa)->ia6_flags & 17778064Sume (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 178194760Srwatson ifa_free(ifa); 179120856Sume return (EADDRNOTAVAIL); 18053541Sshin } 181194760Srwatson if (ifa != NULL) 182194760Srwatson ifa_free(ifa); 18353541Sshin } 18453541Sshin if (lport) { 18553541Sshin struct inpcb *t; 18653541Sshin 18753541Sshin /* GROSS */ 188181803Sbz if (ntohs(lport) <= V_ipport_reservedhigh && 189181803Sbz ntohs(lport) >= V_ipport_reservedlow && 190164033Srwatson priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 191170587Srwatson 0)) 192120856Sume return (EACCES); 193159976Spjd if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 194183606Sbz priv_check_cred(inp->inp_cred, 195170587Srwatson PRIV_NETINET_REUSEPORT, 0) != 0) { 19655679Sshin t = in6_pcblookup_local(pcbinfo, 19753541Sshin &sin6->sin6_addr, lport, 198180427Sbz INPLOOKUP_WILDCARD, cred); 199132699Syar if (t && 200189848Srwatson ((t->inp_flags & INP_TIMEWAIT) == 0) && 201132699Syar (so->so_type != SOCK_STREAM || 202132699Syar IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 20397658Stanimura (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 204171260Sdelphij !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 205171260Sdelphij (t->inp_socket->so_options & SO_REUSEPORT) 206183606Sbz == 0) && (inp->inp_cred->cr_uid != 207183606Sbz t->inp_cred->cr_uid)) 20897658Stanimura return (EADDRINUSE); 20978064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 21055679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 21155679Sshin struct sockaddr_in sin; 21255679Sshin 21355679Sshin in6_sin6_2_sin(&sin, sin6); 21455679Sshin t = in_pcblookup_local(pcbinfo, 215180427Sbz sin.sin_addr, lport, 216180427Sbz INPLOOKUP_WILDCARD, cred); 217132699Syar if (t && 218189848Srwatson ((t->inp_flags & 219132699Syar INP_TIMEWAIT) == 0) && 220132699Syar (so->so_type != SOCK_STREAM || 221132699Syar ntohl(t->inp_faddr.s_addr) == 222132699Syar INADDR_ANY) && 223183606Sbz (inp->inp_cred->cr_uid != 224183606Sbz t->inp_cred->cr_uid)) 22555679Sshin return (EADDRINUSE); 22655679Sshin } 22753541Sshin } 22853541Sshin t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 229180427Sbz lport, wild, cred); 230189848Srwatson if (t && (reuseport & ((t->inp_flags & INP_TIMEWAIT) ? 231171260Sdelphij intotw(t)->tw_so_options : 232116453Scognet t->inp_socket->so_options)) == 0) 233120856Sume return (EADDRINUSE); 23478064Sume if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 23555679Sshin IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 23655679Sshin struct sockaddr_in sin; 23755679Sshin 23855679Sshin in6_sin6_2_sin(&sin, sin6); 23955679Sshin t = in_pcblookup_local(pcbinfo, sin.sin_addr, 240180427Sbz lport, wild, cred); 241189848Srwatson if (t && t->inp_flags & INP_TIMEWAIT) { 242171260Sdelphij if ((reuseport & 243116453Scognet intotw(t)->tw_so_options) == 0 && 244116453Scognet (ntohl(t->inp_laddr.s_addr) != 245171260Sdelphij INADDR_ANY || ((inp->inp_vflag & 246171260Sdelphij INP_IPV6PROTO) == 247116453Scognet (t->inp_vflag & INP_IPV6PROTO)))) 248116453Scognet return (EADDRINUSE); 249116453Scognet } 250171260Sdelphij else if (t && 251171260Sdelphij (reuseport & t->inp_socket->so_options) 252171260Sdelphij == 0 && (ntohl(t->inp_laddr.s_addr) != 253116453Scognet INADDR_ANY || INP_SOCKAF(so) == 25497658Stanimura INP_SOCKAF(t->inp_socket))) 25597658Stanimura return (EADDRINUSE); 25655679Sshin } 25753541Sshin } 25853541Sshin inp->in6p_laddr = sin6->sin6_addr; 25953541Sshin } 26053541Sshin if (lport == 0) { 261188144Sjamie if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) 262188144Sjamie return (error); 263183611Sbz } else { 26462587Sitojun inp->inp_lport = lport; 26562587Sitojun if (in_pcbinshash(inp) != 0) { 26662587Sitojun inp->in6p_laddr = in6addr_any; 26762587Sitojun inp->inp_lport = 0; 26862587Sitojun return (EAGAIN); 26953541Sshin } 27053541Sshin } 271120856Sume return (0); 27253541Sshin} 27353541Sshin 27453541Sshin/* 27553541Sshin * Transform old in6_pcbconnect() into an inner subroutine for new 27653541Sshin * in6_pcbconnect(): Do some validity-checking on the remote 27753541Sshin * address (in mbuf 'nam') and then determine local host address 27853541Sshin * (i.e., which interface) to use to access that remote host. 27953541Sshin * 28053541Sshin * This preserves definition of in6_pcbconnect(), while supporting a 28153541Sshin * slightly different version for T/TCP. (This is more than 28253541Sshin * a bit of a kludge, but cleaning up the internal interfaces would 28353541Sshin * have forced minor changes in every protocol). 28453541Sshin */ 28553541Sshinint 286171259Sdelphijin6_pcbladdr(register struct inpcb *inp, struct sockaddr *nam, 287194777Sbz struct in6_addr *plocal_addr6) 28853541Sshin{ 28953541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 290148385Sume int error = 0; 29153541Sshin struct ifnet *ifp = NULL; 292148385Sume int scope_ambiguous = 0; 293194777Sbz struct in6_addr in6a; 29453541Sshin 295158011Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 296178285Srwatson INP_WLOCK_ASSERT(inp); 297158011Srwatson 29853541Sshin if (nam->sa_len != sizeof (*sin6)) 29953541Sshin return (EINVAL); 30053541Sshin if (sin6->sin6_family != AF_INET6) 30153541Sshin return (EAFNOSUPPORT); 30253541Sshin if (sin6->sin6_port == 0) 30353541Sshin return (EADDRNOTAVAIL); 30453541Sshin 305181803Sbz if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 306148385Sume scope_ambiguous = 1; 307181803Sbz if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 308148385Sume return(error); 309148385Sume 310194907Srwatson if (!TAILQ_EMPTY(&V_in6_ifaddrhead)) { 31153541Sshin /* 31253541Sshin * If the destination address is UNSPECIFIED addr, 31353541Sshin * use the loopback addr, e.g ::1. 31453541Sshin */ 31553541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 31653541Sshin sin6->sin6_addr = in6addr_loopback; 31753541Sshin } 318188144Sjamie if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 319188144Sjamie return (error); 320148385Sume 321194777Sbz error = in6_selectsrc(sin6, inp->in6p_outputopts, 322194777Sbz inp, NULL, inp->inp_cred, &ifp, &in6a); 323194777Sbz if (error) 324194777Sbz return (error); 325194777Sbz 326148385Sume if (ifp && scope_ambiguous && 327148385Sume (error = in6_setscope(&sin6->sin6_addr, ifp, NULL)) != 0) { 328148385Sume return(error); 32953541Sshin } 330148385Sume 331148385Sume /* 332194777Sbz * Do not update this earlier, in case we return with an error. 333194777Sbz * 334194777Sbz * XXX: this in6_selectsrc result might replace the bound local 335202915Sbz * address with the address specified by setsockopt(IPV6_PKTINFO). 336194777Sbz * Is it the intended behavior? 337194777Sbz */ 338194777Sbz *plocal_addr6 = in6a; 339194777Sbz 340194777Sbz /* 341148385Sume * Don't do pcblookup call here; return interface in 342148385Sume * plocal_addr6 343148385Sume * and exit to caller, that will do the lookup. 344148385Sume */ 345148385Sume 346120856Sume return (0); 34753541Sshin} 34853541Sshin 34953541Sshin/* 35053541Sshin * Outer subroutine: 35153541Sshin * Connect from a socket to a specified address. 35253541Sshin * Both address and port must be specified in argument sin. 35353541Sshin * If don't have a local address for this socket yet, 35453541Sshin * then pick one. 35553541Sshin */ 35653541Sshinint 357171259Sdelphijin6_pcbconnect(register struct inpcb *inp, struct sockaddr *nam, 358171259Sdelphij struct ucred *cred) 35953541Sshin{ 36053541Sshin register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 361194777Sbz struct in6_addr addr6; 36253541Sshin int error; 36353541Sshin 364132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 365178285Srwatson INP_WLOCK_ASSERT(inp); 366132714Srwatson 36753541Sshin /* 36895023Ssuz * Call inner routine, to assign local interface address. 36995023Ssuz * in6_pcbladdr() may automatically fill in sin6_scope_id. 37053541Sshin */ 37153541Sshin if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 372120856Sume return (error); 37353541Sshin 37453541Sshin if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, 37553541Sshin sin6->sin6_port, 37653541Sshin IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 377194777Sbz ? &addr6 : &inp->in6p_laddr, 37853541Sshin inp->inp_lport, 0, NULL) != NULL) { 37953541Sshin return (EADDRINUSE); 38053541Sshin } 38153541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 38253541Sshin if (inp->inp_lport == 0) { 383127505Spjd error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 38453541Sshin if (error) 38553541Sshin return (error); 38653541Sshin } 387194777Sbz inp->in6p_laddr = addr6; 38853541Sshin } 38953541Sshin inp->in6p_faddr = sin6->sin6_addr; 39053541Sshin inp->inp_fport = sin6->sin6_port; 39178064Sume /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 392186141Sbz inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 393186141Sbz if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 394186141Sbz inp->inp_flow |= 395120649Sume (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 39653541Sshin 39753541Sshin in_pcbrehash(inp); 398171133Sgnn 39953541Sshin return (0); 40053541Sshin} 40153541Sshin 40253541Sshinvoid 403171259Sdelphijin6_pcbdisconnect(struct inpcb *inp) 40453541Sshin{ 405132714Srwatson 406132714Srwatson INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo); 407178285Srwatson INP_WLOCK_ASSERT(inp); 408132714Srwatson 40953541Sshin bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 41053541Sshin inp->inp_fport = 0; 41178064Sume /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 412186141Sbz inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 41353541Sshin in_pcbrehash(inp); 41453541Sshin} 41553541Sshin 416102218Struckmanstruct sockaddr * 417171259Sdelphijin6_sockaddr(in_port_t port, struct in6_addr *addr_p) 418102218Struckman{ 419102218Struckman struct sockaddr_in6 *sin6; 420102218Struckman 421184205Sdes sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 422102218Struckman bzero(sin6, sizeof *sin6); 423102218Struckman sin6->sin6_family = AF_INET6; 424102218Struckman sin6->sin6_len = sizeof(*sin6); 425102218Struckman sin6->sin6_port = port; 426102218Struckman sin6->sin6_addr = *addr_p; 427148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 428102218Struckman 429102218Struckman return (struct sockaddr *)sin6; 430102218Struckman} 431102218Struckman 432102218Struckmanstruct sockaddr * 433171259Sdelphijin6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 434102218Struckman{ 435102218Struckman struct sockaddr_in sin; 436102218Struckman struct sockaddr_in6 *sin6_p; 437102218Struckman 438102218Struckman bzero(&sin, sizeof sin); 439102218Struckman sin.sin_family = AF_INET; 440102218Struckman sin.sin_len = sizeof(sin); 441102218Struckman sin.sin_port = port; 442102218Struckman sin.sin_addr = *addr_p; 443102218Struckman 444184205Sdes sin6_p = malloc(sizeof *sin6_p, M_SONAME, 445111119Simp M_WAITOK); 446102218Struckman in6_sin_2_v4mapsin6(&sin, sin6_p); 447102218Struckman 448102218Struckman return (struct sockaddr *)sin6_p; 449102218Struckman} 450102218Struckman 45153541Sshinint 452171259Sdelphijin6_getsockaddr(struct socket *so, struct sockaddr **nam) 45353541Sshin{ 45453541Sshin register struct inpcb *inp; 455102218Struckman struct in6_addr addr; 456102218Struckman in_port_t port; 45753541Sshin 45853541Sshin inp = sotoinpcb(so); 459169462Srwatson KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 460157673Srwatson 461178320Srwatson INP_RLOCK(inp); 462102218Struckman port = inp->inp_lport; 463102218Struckman addr = inp->in6p_laddr; 464178320Srwatson INP_RUNLOCK(inp); 46553541Sshin 466102218Struckman *nam = in6_sockaddr(port, &addr); 46753541Sshin return 0; 46853541Sshin} 46953541Sshin 47053541Sshinint 471171259Sdelphijin6_getpeeraddr(struct socket *so, struct sockaddr **nam) 47253541Sshin{ 47353541Sshin struct inpcb *inp; 474102218Struckman struct in6_addr addr; 475102218Struckman in_port_t port; 47653541Sshin 47753541Sshin inp = sotoinpcb(so); 478169462Srwatson KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 479157673Srwatson 480178320Srwatson INP_RLOCK(inp); 481102218Struckman port = inp->inp_fport; 482102218Struckman addr = inp->in6p_faddr; 483178320Srwatson INP_RUNLOCK(inp); 48453541Sshin 485102218Struckman *nam = in6_sockaddr(port, &addr); 48653541Sshin return 0; 48753541Sshin} 48853541Sshin 48953541Sshinint 49053541Sshinin6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 49153541Sshin{ 492157673Srwatson struct inpcb *inp; 49353541Sshin int error; 49453541Sshin 495157673Srwatson inp = sotoinpcb(so); 496157673Srwatson KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 497157673Srwatson 498124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 499169462Srwatson error = in_getsockaddr(so, nam); 50054952Seivind if (error == 0) 50153541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 502120913Sume } else { 503169462Srwatson /* scope issues will be handled in in6_getsockaddr(). */ 504169462Srwatson error = in6_getsockaddr(so, nam); 505120913Sume } 50653541Sshin 50753541Sshin return error; 50853541Sshin} 50953541Sshin 51053541Sshinint 51153541Sshinin6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 51253541Sshin{ 513157673Srwatson struct inpcb *inp; 51453541Sshin int error; 51553541Sshin 516157673Srwatson inp = sotoinpcb(so); 517157673Srwatson KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 518157673Srwatson 519124332Sume if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 520169462Srwatson error = in_getpeeraddr(so, nam); 52154952Seivind if (error == 0) 52253541Sshin in6_sin_2_v4mapsin6_in_sock(nam); 52353541Sshin } else 524169462Srwatson /* scope issues will be handled in in6_getpeeraddr(). */ 525169462Srwatson error = in6_getpeeraddr(so, nam); 52653541Sshin 52753541Sshin return error; 52853541Sshin} 52953541Sshin 53053541Sshin/* 53153541Sshin * Pass some notification to all connections of a protocol 53253541Sshin * associated with address dst. The local address and/or port numbers 53353541Sshin * may be specified to limit the search. The "usual action" will be 53453541Sshin * taken, depending on the ctlinput cmd. The caller must filter any 53553541Sshin * cmds that are uninteresting (e.g., no error in the map). 53653541Sshin * Call the protocol specific routine (if any) to report 53753541Sshin * any errors for each matching socket. 53853541Sshin */ 53953541Sshinvoid 540171259Sdelphijin6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 541171259Sdelphij u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 542171259Sdelphij int cmd, void *cmdarg, 543175162Sobrien struct inpcb *(*notify)(struct inpcb *, int)) 54453541Sshin{ 545177961Srwatson struct inpcb *inp, *inp_temp; 54678064Sume struct sockaddr_in6 sa6_src, *sa6_dst; 54753541Sshin u_short fport = fport_arg, lport = lport_arg; 54878064Sume u_int32_t flowinfo; 549157673Srwatson int errno; 55053541Sshin 551119995Sru if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 55253541Sshin return; 55378064Sume 55478064Sume sa6_dst = (struct sockaddr_in6 *)dst; 55578064Sume if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 55653541Sshin return; 55753541Sshin 55853541Sshin /* 55978064Sume * note that src can be NULL when we get notify by local fragmentation. 56078064Sume */ 56191346Salfred sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 56278064Sume flowinfo = sa6_src.sin6_flowinfo; 56378064Sume 56478064Sume /* 56553541Sshin * Redirects go to all references to the destination, 56662587Sitojun * and use in6_rtchange to invalidate the route cache. 56762587Sitojun * Dead host indications: also use in6_rtchange to invalidate 56862587Sitojun * the cache, and deliver the error to all the sockets. 56953541Sshin * Otherwise, if we have knowledge of the local port and address, 57053541Sshin * deliver only to that socket. 57153541Sshin */ 57253541Sshin if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 57353541Sshin fport = 0; 57453541Sshin lport = 0; 57578064Sume bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 57662587Sitojun 57778064Sume if (cmd != PRC_HOSTDEAD) 57878064Sume notify = in6_rtchange; 57953541Sshin } 58053541Sshin errno = inet6ctlerrmap[cmd]; 581133192Srwatson INP_INFO_WLOCK(pcbinfo); 582177961Srwatson LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 583178285Srwatson INP_WLOCK(inp); 584171260Sdelphij if ((inp->inp_vflag & INP_IPV6) == 0) { 585178285Srwatson INP_WUNLOCK(inp); 58653541Sshin continue; 587133192Srwatson } 58862587Sitojun 58978064Sume /* 590125776Sume * If the error designates a new path MTU for a destination 591125776Sume * and the application (associated with this socket) wanted to 592125776Sume * know the value, notify. Note that we notify for all 593125776Sume * disconnected sockets if the corresponding application 594125776Sume * wanted. This is because some UDP applications keep sending 595125776Sume * sockets disconnected. 596125776Sume * XXX: should we avoid to notify the value to TCP sockets? 597125776Sume */ 598125776Sume if (cmd == PRC_MSGSIZE && (inp->inp_flags & IN6P_MTU) != 0 && 599125776Sume (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 600125776Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &sa6_dst->sin6_addr))) { 601125776Sume ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 602125776Sume (u_int32_t *)cmdarg); 603125776Sume } 604125776Sume 605125776Sume /* 60678064Sume * Detect if we should notify the error. If no source and 60778064Sume * destination ports are specifed, but non-zero flowinfo and 60878064Sume * local address match, notify the error. This is the case 60978064Sume * when the error is delivered with an encrypted buffer 61078064Sume * by ESP. Otherwise, just compare addresses and ports 61178064Sume * as usual. 61278064Sume */ 61378064Sume if (lport == 0 && fport == 0 && flowinfo && 61478064Sume inp->inp_socket != NULL && 615186141Sbz flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 61678064Sume IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 61778064Sume goto do_notify; 61878064Sume else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 61978064Sume &sa6_dst->sin6_addr) || 62078064Sume inp->inp_socket == 0 || 62178064Sume (lport && inp->inp_lport != lport) || 62278064Sume (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 62378064Sume !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 62478064Sume &sa6_src.sin6_addr)) || 625133192Srwatson (fport && inp->inp_fport != fport)) { 626178285Srwatson INP_WUNLOCK(inp); 62753541Sshin continue; 628133192Srwatson } 62962587Sitojun 63078064Sume do_notify: 631134121Srwatson if (notify) { 632134121Srwatson if ((*notify)(inp, errno)) 633178285Srwatson INP_WUNLOCK(inp); 634134121Srwatson } else 635178285Srwatson INP_WUNLOCK(inp); 63653541Sshin } 637133192Srwatson INP_INFO_WUNLOCK(pcbinfo); 63853541Sshin} 63953541Sshin 64053541Sshin/* 64153541Sshin * Lookup a PCB based on the local address and port. 64253541Sshin */ 64353541Sshinstruct inpcb * 644171259Sdelphijin6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 645180427Sbz u_short lport, int wild_okay, struct ucred *cred) 64653541Sshin{ 64753541Sshin register struct inpcb *inp; 64853541Sshin int matchwild = 3, wildcard; 64953541Sshin 650158011Srwatson INP_INFO_WLOCK_ASSERT(pcbinfo); 651158011Srwatson 65253541Sshin if (!wild_okay) { 65353541Sshin struct inpcbhead *head; 65453541Sshin /* 65553541Sshin * Look for an unconnected (wildcard foreign addr) PCB that 65653541Sshin * matches the local address and port we're looking for. 65753541Sshin */ 658169154Srwatson head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 659169154Srwatson 0, pcbinfo->ipi_hashmask)]; 66053541Sshin LIST_FOREACH(inp, head, inp_hash) { 661185435Sbz /* XXX inp locking */ 66254952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 66353541Sshin continue; 66453541Sshin if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 66553541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 66653541Sshin inp->inp_lport == lport) { 667185435Sbz /* Found. */ 668185435Sbz if (cred == NULL || 669192895Sjamie prison_equal_ip6(cred->cr_prison, 670192895Sjamie inp->inp_cred->cr_prison)) 671185435Sbz return (inp); 67253541Sshin } 67353541Sshin } 67453541Sshin /* 67553541Sshin * Not found. 67653541Sshin */ 67753541Sshin return (NULL); 67853541Sshin } else { 67953541Sshin struct inpcbporthead *porthash; 68053541Sshin struct inpcbport *phd; 68153541Sshin struct inpcb *match = NULL; 68253541Sshin /* 68353541Sshin * Best fit PCB lookup. 68453541Sshin * 68553541Sshin * First see if this local port is in use by looking on the 68653541Sshin * port hash list. 68753541Sshin */ 688169154Srwatson porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 689169154Srwatson pcbinfo->ipi_porthashmask)]; 69053541Sshin LIST_FOREACH(phd, porthash, phd_hash) { 69153541Sshin if (phd->phd_port == lport) 69253541Sshin break; 69353541Sshin } 69453541Sshin if (phd != NULL) { 69553541Sshin /* 69653541Sshin * Port is in use by one or more PCBs. Look for best 69753541Sshin * fit. 69853541Sshin */ 69953541Sshin LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 70053541Sshin wildcard = 0; 701185435Sbz if (cred != NULL && 702192895Sjamie !prison_equal_ip6(cred->cr_prison, 703192895Sjamie inp->inp_cred->cr_prison)) 704185435Sbz continue; 705185435Sbz /* XXX inp locking */ 70654952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 70753541Sshin continue; 70853541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 70953541Sshin wildcard++; 71053541Sshin if (!IN6_IS_ADDR_UNSPECIFIED( 71153541Sshin &inp->in6p_laddr)) { 71253541Sshin if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 71353541Sshin wildcard++; 71453541Sshin else if (!IN6_ARE_ADDR_EQUAL( 715185435Sbz &inp->in6p_laddr, laddr)) 71653541Sshin continue; 71753541Sshin } else { 71853541Sshin if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 71953541Sshin wildcard++; 72053541Sshin } 72153541Sshin if (wildcard < matchwild) { 72253541Sshin match = inp; 72353541Sshin matchwild = wildcard; 724185435Sbz if (matchwild == 0) 72553541Sshin break; 72653541Sshin } 72753541Sshin } 72853541Sshin } 72953541Sshin return (match); 73053541Sshin } 73153541Sshin} 73253541Sshin 73381127Sumevoid 734171259Sdelphijin6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 73581127Sume{ 736186141Sbz struct inpcb *in6p; 73781127Sume struct ip6_moptions *im6o; 738191672Sbms int i, gap; 73981127Sume 740157978Srwatson INP_INFO_RLOCK(pcbinfo); 741169154Srwatson LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 742178285Srwatson INP_WLOCK(in6p); 74381127Sume im6o = in6p->in6p_moptions; 744191672Sbms if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) { 74581127Sume /* 746191672Sbms * Unselect the outgoing ifp for multicast if it 747191672Sbms * is being detached. 74881127Sume */ 74981127Sume if (im6o->im6o_multicast_ifp == ifp) 75081127Sume im6o->im6o_multicast_ifp = NULL; 75181127Sume /* 75281127Sume * Drop multicast group membership if we joined 75381127Sume * through the interface being detached. 75481127Sume */ 755191672Sbms gap = 0; 756191672Sbms for (i = 0; i < im6o->im6o_num_memberships; i++) { 757191672Sbms if (im6o->im6o_membership[i]->in6m_ifp == 758191672Sbms ifp) { 759191672Sbms in6_mc_leave(im6o->im6o_membership[i], 760191672Sbms NULL); 761191672Sbms gap++; 762191672Sbms } else if (gap != 0) { 763191672Sbms im6o->im6o_membership[i - gap] = 764191672Sbms im6o->im6o_membership[i]; 76581127Sume } 76681127Sume } 767191672Sbms im6o->im6o_num_memberships -= gap; 76881127Sume } 769178285Srwatson INP_WUNLOCK(in6p); 77081127Sume } 771157978Srwatson INP_INFO_RUNLOCK(pcbinfo); 77281127Sume} 77381127Sume 77453541Sshin/* 77553541Sshin * Check for alternatives when higher level complains 77653541Sshin * about service problems. For now, invalidate cached 77753541Sshin * routing information. If the route was created dynamically 77853541Sshin * (by a redirect), time to try a default gateway again. 77953541Sshin */ 78053541Sshinvoid 781171259Sdelphijin6_losing(struct inpcb *in6p) 78253541Sshin{ 783171259Sdelphij 784122922Sandre /* 785122922Sandre * We don't store route pointers in the routing table anymore 786122922Sandre */ 787122922Sandre return; 78853541Sshin} 78953541Sshin 79053541Sshin/* 79153541Sshin * After a routing change, flush old routing 79253541Sshin * and allocate a (hopefully) better one. 79353541Sshin */ 79498211Shsustruct inpcb * 795171259Sdelphijin6_rtchange(struct inpcb *inp, int errno) 79653541Sshin{ 797122922Sandre /* 798122922Sandre * We don't store route pointers in the routing table anymore 799122922Sandre */ 80098211Shsu return inp; 80153541Sshin} 80253541Sshin 80353541Sshin/* 80453541Sshin * Lookup PCB in hash list. 80553541Sshin */ 80653541Sshinstruct inpcb * 807171259Sdelphijin6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 808185435Sbz u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, int wildcard, 809185435Sbz struct ifnet *ifp) 81053541Sshin{ 81153541Sshin struct inpcbhead *head; 812185435Sbz struct inpcb *inp, *tmpinp; 81353541Sshin u_short fport = fport_arg, lport = lport_arg; 81478064Sume int faith; 81553541Sshin 816178285Srwatson INP_INFO_LOCK_ASSERT(pcbinfo); 817158011Srwatson 81883934Sbrooks if (faithprefix_p != NULL) 81983934Sbrooks faith = (*faithprefix_p)(laddr); 82083934Sbrooks else 82183934Sbrooks faith = 0; 82278064Sume 82353541Sshin /* 82453541Sshin * First look for an exact match. 82553541Sshin */ 826185435Sbz tmpinp = NULL; 827169154Srwatson head = &pcbinfo->ipi_hashbase[ 828169154Srwatson INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, lport, fport, 829169154Srwatson pcbinfo->ipi_hashmask)]; 83054263Sshin LIST_FOREACH(inp, head, inp_hash) { 831185435Sbz /* XXX inp locking */ 83254952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 83353541Sshin continue; 83453541Sshin if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 83553541Sshin IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 83653541Sshin inp->inp_fport == fport && 83753541Sshin inp->inp_lport == lport) { 83853541Sshin /* 839185435Sbz * XXX We should be able to directly return 840185435Sbz * the inp here, without any checks. 841185435Sbz * Well unless both bound with SO_REUSEPORT? 84253541Sshin */ 843192895Sjamie if (prison_flag(inp->inp_cred, PR_IP6)) 844185435Sbz return (inp); 845185435Sbz if (tmpinp == NULL) 846185435Sbz tmpinp = inp; 84753541Sshin } 84853541Sshin } 849185435Sbz if (tmpinp != NULL) 850185435Sbz return (tmpinp); 85153541Sshin 852185435Sbz /* 853185435Sbz * Then look for a wildcard match, if requested. 854185435Sbz */ 855185435Sbz if (wildcard == INPLOOKUP_WILDCARD) { 856185435Sbz struct inpcb *local_wild = NULL, *local_exact = NULL; 857185435Sbz struct inpcb *jail_wild = NULL; 858185435Sbz int injail; 859185435Sbz 860185435Sbz /* 861185435Sbz * Order of socket selection - we always prefer jails. 862185435Sbz * 1. jailed, non-wild. 863185435Sbz * 2. jailed, wild. 864185435Sbz * 3. non-jailed, non-wild. 865185435Sbz * 4. non-jailed, wild. 866185435Sbz */ 867169154Srwatson head = &pcbinfo->ipi_hashbase[INP_PCBHASH(INADDR_ANY, lport, 868169154Srwatson 0, pcbinfo->ipi_hashmask)]; 86954263Sshin LIST_FOREACH(inp, head, inp_hash) { 870185435Sbz /* XXX inp locking */ 87154952Seivind if ((inp->inp_vflag & INP_IPV6) == 0) 87253541Sshin continue; 873185435Sbz 874185435Sbz if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 875185435Sbz inp->inp_lport != lport) { 876185435Sbz continue; 877185435Sbz } 878185435Sbz 879185435Sbz /* XXX inp locking */ 880185435Sbz if (faith && (inp->inp_flags & INP_FAITH) == 0) 881185435Sbz continue; 882185435Sbz 883192895Sjamie injail = prison_flag(inp->inp_cred, PR_IP6); 884185435Sbz if (injail) { 885188144Sjamie if (prison_check_ip6(inp->inp_cred, 886188144Sjamie laddr) != 0) 88753541Sshin continue; 888185435Sbz } else { 889185435Sbz if (local_exact != NULL) 890185435Sbz continue; 891185435Sbz } 892185435Sbz 893185435Sbz if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 894185435Sbz if (injail) 89553541Sshin return (inp); 896185435Sbz else 897185435Sbz local_exact = inp; 898185435Sbz } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 899185435Sbz if (injail) 900185435Sbz jail_wild = inp; 901185435Sbz else 90253541Sshin local_wild = inp; 90353541Sshin } 904185435Sbz } /* LIST_FOREACH */ 90553541Sshin 906185435Sbz if (jail_wild != NULL) 907185435Sbz return (jail_wild); 908185435Sbz if (local_exact != NULL) 909185435Sbz return (local_exact); 910185435Sbz if (local_wild != NULL) 911185435Sbz return (local_wild); 912185435Sbz } /* if (wildcard == INPLOOKUP_WILDCARD) */ 913185435Sbz 91453541Sshin /* 91553541Sshin * Not found. 91653541Sshin */ 91753541Sshin return (NULL); 91853541Sshin} 91953541Sshin 92053541Sshinvoid 92153541Sshininit_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) 92253541Sshin{ 92353541Sshin struct ip6_hdr *ip; 92453541Sshin 92553541Sshin ip = mtod(m, struct ip6_hdr *); 92653541Sshin bzero(sin6, sizeof(*sin6)); 92753541Sshin sin6->sin6_len = sizeof(*sin6); 92853541Sshin sin6->sin6_family = AF_INET6; 92953541Sshin sin6->sin6_addr = ip->ip6_src; 93053541Sshin 931148385Sume (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 932148385Sume 93353541Sshin return; 93453541Sshin} 935