diff options
Diffstat (limited to 'sys/netinet6/in6_pcb.c')
| -rw-r--r-- | sys/netinet6/in6_pcb.c | 1131 |
1 files changed, 1131 insertions, 0 deletions
diff --git a/sys/netinet6/in6_pcb.c b/sys/netinet6/in6_pcb.c new file mode 100644 index 0000000..884410a --- /dev/null +++ b/sys/netinet6/in6_pcb.c @@ -0,0 +1,1131 @@ +/* + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Copyright (c) 1982, 1986, 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 + * $FreeBSD$ + */ + +#include "opt_inet.h" +#include "opt_ipsec.h" +#include "opt_key.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sockio.h> +#include <sys/errno.h> +#include <sys/time.h> +#include <sys/proc.h> +#include <sys/jail.h> + +#include <vm/vm_zone.h> + +#include <net/if.h> +#include <net/if_types.h> +#include <net/route.h> + +#include <netinet/in.h> +#include <netinet/in_var.h> +#include <netinet/in_systm.h> +#include <netinet6/ip6.h> +#include <netinet6/ip6_var.h> +#include <netinet6/nd6.h> +#include <netinet/in_pcb.h> +#include <netinet6/in6_pcb.h> + +/* #include "faith.h" */ + +#ifdef IPSEC +#include <netinet6/ipsec.h> +#ifdef INET6 +#include <netinet6/ipsec6.h> +#endif /* INET6 */ +#include <netkey/key.h> +#ifdef KEY_DEBUG +#include <netkey/key_debug.h> +#ifdef INET6 +#include <netkey/key_debug6.h> +#endif /* INET6 */ +#else +#define DPRINTF(lev,arg) +#define DDO(lev, stmt) +#define DP(x, y, z) +#endif /* KEY_DEBUG */ +#endif /* IPSEC */ + +struct in6_addr zeroin6_addr; + +int +in6_pcbbind(inp, nam, p) + register struct inpcb *inp; + struct sockaddr *nam; + struct proc *p; +{ + struct socket *so = inp->inp_socket; + unsigned short *lastport; + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; + struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; + u_short lport = 0; + int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); + int error; + + if (!in6_ifaddr) /* XXX broken! */ + return (EADDRNOTAVAIL); + if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) + return(EINVAL); + if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) + wild = 1; + if (nam) { + sin6 = (struct sockaddr_in6 *)nam; + if (nam->sa_len != sizeof(*sin6)) + return(EINVAL); + /* + * family check. + */ + if (nam->sa_family != AF_INET6) + return(EAFNOSUPPORT); + + /* + * If the scope of the destination is link-local, embed the + * interface index in the address. + */ + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { + /* XXX boundary check is assumed to be already done. */ + /* XXX sin6_scope_id is weaker than advanced-api. */ + struct in6_pktinfo *pi; + if (inp->in6p_outputopts && + (pi = inp->in6p_outputopts->ip6po_pktinfo) && + pi->ipi6_ifindex) { + sin6->sin6_addr.s6_addr16[1] + = htons(pi->ipi6_ifindex); + } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) + && inp->in6p_moptions + && inp->in6p_moptions->im6o_multicast_ifp) { + sin6->sin6_addr.s6_addr16[1] = + htons(inp->in6p_moptions->im6o_multicast_ifp->if_index); + } else if (sin6->sin6_scope_id) { + /* boundary check */ + if (sin6->sin6_scope_id < 0 + || if_index < sin6->sin6_scope_id) { + return ENXIO; /* XXX EINVAL? */ + } + sin6->sin6_addr.s6_addr16[1] + = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ + /* this must be cleared for ifa_ifwithaddr() */ + sin6->sin6_scope_id = 0; + } + } + + lport = sin6->sin6_port; + if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { + /* + * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; + * allow compepte duplication of binding if + * SO_REUSEPORT is set, or if SO_REUSEADDR is set + * and a multicast address is bound on both + * new and duplicated sockets. + */ + if (so->so_options & SO_REUSEADDR) + reuseport = SO_REUSEADDR|SO_REUSEPORT; + } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { + struct ifaddr *ia = NULL; + + sin6->sin6_port = 0; /* yech... */ + if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) + return(EADDRNOTAVAIL); + + /* + * XXX: bind to an anycast address might accidentally + * cause sending a packet with anycast source address. + */ + if (ia && + ((struct in6_ifaddr *)ia)->ia6_flags & + (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| + IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { + return(EADDRNOTAVAIL); + } + } + if (lport) { + struct inpcb *t; + + /* GROSS */ + if (ntohs(lport) < IPV6PORT_RESERVED && p && + suser_xxx(0, p, PRISON_ROOT)) + return(EACCES); + if (so->so_cred->cr_uid != 0 && + !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { + t = in6_pcblookup_local(inp->inp_pcbinfo, + &sin6->sin6_addr, lport, + INPLOOKUP_WILDCARD); + if (t && + (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || + !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || + (t->inp_socket->so_options & + SO_REUSEPORT) == 0) && + (so->so_cred->cr_uid != + t->inp_socket->so_cred->cr_uid)) + return (EADDRINUSE); + } + t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, + lport, wild); + if (t && (reuseport & t->inp_socket->so_options) == 0) + return(EADDRINUSE); + } + inp->in6p_laddr = sin6->sin6_addr; + } + if (lport == 0) { + ushort first, last; + int count; + + inp->inp_flags |= INP_ANONPORT; + + if (inp->inp_flags & INP_HIGHPORT) { + first = ipport_hifirstauto; /* sysctl */ + last = ipport_hilastauto; + lastport = &pcbinfo->lasthi; + } else if (inp->inp_flags & INP_LOWPORT) { + if (p && (error = suser_xxx(0, p, PRISON_ROOT))) + return error; + first = ipport_lowfirstauto; /* 1023 */ + last = ipport_lowlastauto; /* 600 */ + lastport = &pcbinfo->lastlow; + } else { + first = ipport_firstauto; /* sysctl */ + last = ipport_lastauto; + lastport = &pcbinfo->lastport; + } + /* + * Simple check to ensure all ports are not used up causing + * a deadlock here. + * + * We split the two cases (up and down) so that the direction + * is not being tested on each round of the loop. + */ + if (first > last) { + /* + * counting down + */ + count = first - last; + + do { + if (count-- < 0) { /* completely used? */ + /* + * Undo any address bind that may have + * occurred above. + */ + inp->in6p_laddr = in6addr_any; + return (EAGAIN); + } + --*lastport; + if (*lastport > first || *lastport < last) + *lastport = first; + lport = htons(*lastport); + } while (in6_pcblookup_local(pcbinfo, + &inp->in6p_laddr, lport, wild)); + } else { + /* + * counting up + */ + count = last - first; + + do { + if (count-- < 0) { /* completely used? */ + /* + * Undo any address bind that may have + * occurred above. + */ + inp->in6p_laddr = in6addr_any; + return (EAGAIN); + } + ++*lastport; + if (*lastport < first || *lastport > last) + *lastport = first; + lport = htons(*lastport); + } while (in6_pcblookup_local(pcbinfo, + &inp->in6p_laddr, lport, wild)); + } + } + inp->inp_lport = lport; + if (in_pcbinshash(inp) != 0) { + inp->in6p_laddr = in6addr_any; + inp->inp_lport = 0; + return (EAGAIN); + } + inp->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ + return(0); +} + +/* + * Transform old in6_pcbconnect() into an inner subroutine for new + * in6_pcbconnect(): Do some validity-checking on the remote + * address (in mbuf 'nam') and then determine local host address + * (i.e., which interface) to use to access that remote host. + * + * This preserves definition of in6_pcbconnect(), while supporting a + * slightly different version for T/TCP. (This is more than + * a bit of a kludge, but cleaning up the internal interfaces would + * have forced minor changes in every protocol). + */ + +int +in6_pcbladdr(inp, nam, plocal_addr6) + register struct inpcb *inp; + struct sockaddr *nam; + struct in6_addr **plocal_addr6; +{ + register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; + struct in6_pktinfo *pi; + struct ifnet *ifp = NULL; + int error = 0; + + if (nam->sa_len != sizeof (*sin6)) + return (EINVAL); + if (sin6->sin6_family != AF_INET6) + return (EAFNOSUPPORT); + if (sin6->sin6_port == 0) + return (EADDRNOTAVAIL); + + /* + * If the scope of the destination is link-local, embed the interface + * index in the address. + */ + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { + /* XXX boundary check is assumed to be already done. */ + /* XXX sin6_scope_id is weaker than advanced-api. */ + if (inp->in6p_outputopts && + (pi = inp->in6p_outputopts->ip6po_pktinfo) && + pi->ipi6_ifindex) { + sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); + ifp = ifindex2ifnet[pi->ipi6_ifindex]; + } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && + inp->in6p_moptions && + inp->in6p_moptions->im6o_multicast_ifp) { + sin6->sin6_addr.s6_addr16[1] = + htons(inp->in6p_moptions->im6o_multicast_ifp->if_index); + ifp = ifindex2ifnet[inp->in6p_moptions->im6o_multicast_ifp->if_index]; + } else if (sin6->sin6_scope_id) { + /* boundary check */ + if (sin6->sin6_scope_id < 0 + || if_index < sin6->sin6_scope_id) { + return ENXIO; /* XXX EINVAL? */ + } + sin6->sin6_addr.s6_addr16[1] + = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ + ifp = ifindex2ifnet[sin6->sin6_scope_id]; + } + } + + if (in6_ifaddr) { + /* + * If the destination address is UNSPECIFIED addr, + * use the loopback addr, e.g ::1. + */ + if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) + sin6->sin6_addr = in6addr_loopback; + } + { + /* + * XXX: in6_selectsrc might replace the bound local address + * with the address specified by setsockopt(IPV6_PKTINFO). + * Is it the intended behavior? + */ + *plocal_addr6 = in6_selectsrc(sin6, inp->in6p_outputopts, + inp->in6p_moptions, + &inp->in6p_route, + &inp->in6p_laddr, &error); + if (*plocal_addr6 == 0) { + if (error == 0) + error = EADDRNOTAVAIL; + return(error); + } + /* + * Don't do pcblookup call here; return interface in + * plocal_addr6 + * and exit to caller, that will do the lookup. + */ + } + + if (inp->in6p_route.ro_rt) + ifp = inp->in6p_route.ro_rt->rt_ifp; + + inp->in6p_ip6_hlim = (u_int8_t)in6_selecthlim(inp, ifp); + + return(0); +} + +/* + * Outer subroutine: + * Connect from a socket to a specified address. + * Both address and port must be specified in argument sin. + * If don't have a local address for this socket yet, + * then pick one. + */ +int +in6_pcbconnect(inp, nam, p) + register struct inpcb *inp; + struct sockaddr *nam; + struct proc *p; +{ + struct in6_addr *addr6; + register struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; + int error; + + /* + * Call inner routine, to assign local interface address. + */ + if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) + return(error); + + if (in6_pcblookup_hash(inp->inp_pcbinfo, &sin6->sin6_addr, + sin6->sin6_port, + IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) + ? addr6 : &inp->in6p_laddr, + inp->inp_lport, 0, NULL) != NULL) { + return (EADDRINUSE); + } + if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { + if (inp->inp_lport == 0) { + error = in6_pcbbind(inp, (struct sockaddr *)0, p); + if (error) + return (error); + } + inp->in6p_laddr = *addr6; + } + inp->in6p_faddr = sin6->sin6_addr; + inp->inp_fport = sin6->sin6_port; + /* + * xxx kazu flowlabel is necessary for connect? + * but if this line is missing, the garbage value remains. + */ + inp->in6p_flowinfo = sin6->sin6_flowinfo; + + in_pcbrehash(inp); + return (0); +} + +/* + * Return an IPv6 address, which is the most appropriate for given + * destination and user specified options. + * If necessary, this function lookups the routing table and return + * an entry to the caller for later use. + */ +struct in6_addr * +in6_selectsrc(dstsock, opts, mopts, ro, laddr, errorp) + struct sockaddr_in6 *dstsock; + struct ip6_pktopts *opts; + struct ip6_moptions *mopts; + struct route_in6 *ro; + struct in6_addr *laddr; + int *errorp; +{ + struct in6_addr *dst; + struct in6_ifaddr *ia6 = 0; + struct in6_pktinfo *pi = NULL; + + dst = &dstsock->sin6_addr; + *errorp = 0; + + /* + * If the source address is explicitly specified by the caller, + * use it. + */ + if (opts && (pi = opts->ip6po_pktinfo) && + !IN6_IS_ADDR_UNSPECIFIED(&pi->ipi6_addr)) + return(&pi->ipi6_addr); + + /* + * If the source address is not specified but the socket(if any) + * is already bound, use the bound address. + */ + if (laddr && !IN6_IS_ADDR_UNSPECIFIED(laddr)) + return(laddr); + + /* + * If the caller doesn't specify the source address but + * the outgoing interface, use an address associated with + * the interface. + */ + if (pi && pi->ipi6_ifindex) { + /* XXX boundary check is assumed to be already done. */ + ia6 = in6_ifawithscope(ifindex2ifnet[pi->ipi6_ifindex], + dst); + if (ia6 == 0) { + *errorp = EADDRNOTAVAIL; + return(0); + } + return(&satosin6(&ia6->ia_addr)->sin6_addr); + } + + /* + * If the destination address is a link-local unicast address or + * a multicast address, and if the outgoing interface is specified + * by the sin6_scope_id filed, use an address associated with the + * interface. + * XXX: We're now trying to define more specific semantics of + * sin6_scope_id field, so this part will be rewritten in + * the near future. + */ + if ((IN6_IS_ADDR_LINKLOCAL(dst) || IN6_IS_ADDR_MULTICAST(dst)) && + dstsock->sin6_scope_id) { + /* + * I'm not sure if boundary check for scope_id is done + * somewhere... + */ + if (dstsock->sin6_scope_id < 0 || + if_index < dstsock->sin6_scope_id) { + *errorp = ENXIO; /* XXX: better error? */ + return(0); + } + ia6 = in6_ifawithscope(ifindex2ifnet[dstsock->sin6_scope_id], + dst); + if (ia6 == 0) { + *errorp = EADDRNOTAVAIL; + return(0); + } + return(&satosin6(&ia6->ia_addr)->sin6_addr); + } + + /* + * If the destination address is a multicast address and + * the outgoing interface for the address is specified + * by the caller, use an address associated with the interface. + * There is a sanity check here; if the destination has node-local + * scope, the outgoing interfacde should be a loopback address. + * Even if the outgoing interface is not specified, we also + * choose a loopback interface as the outgoing interface. + */ + if (IN6_IS_ADDR_MULTICAST(dst)) { + struct ifnet *ifp = mopts ? mopts->im6o_multicast_ifp : NULL; + + if (ifp == NULL && IN6_IS_ADDR_MC_NODELOCAL(dst)) { + ifp = &loif[0]; + } + + if (ifp) { + ia6 = in6_ifawithscope(ifp, dst); + if (ia6 == 0) { + *errorp = EADDRNOTAVAIL; + return(0); + } + return(&ia6->ia_addr.sin6_addr); + } + } + + /* + * If the next hop address for the packet is specified + * by caller, use an address associated with the route + * to the next hop. + */ + { + struct sockaddr_in6 *sin6_next; + struct rtentry *rt; + + if (opts && opts->ip6po_nexthop) { + sin6_next = satosin6(opts->ip6po_nexthop); + rt = nd6_lookup(&sin6_next->sin6_addr, 1, NULL); + if (rt) { + ia6 = in6_ifawithscope(rt->rt_ifp, dst); + if (ia6 == 0) + ia6 = ifatoia6(rt->rt_ifa); + } + if (ia6 == 0) { + *errorp = EADDRNOTAVAIL; + return(0); + } + return(&satosin6(&ia6->ia_addr)->sin6_addr); + } + } + + /* + * If route is known or can be allocated now, + * our src addr is taken from the i/f, else punt. + */ + if (ro) { + if (ro->ro_rt && + !IN6_ARE_ADDR_EQUAL(&satosin6(&ro->ro_dst)->sin6_addr, dst)) { + RTFREE(ro->ro_rt); + ro->ro_rt = (struct rtentry *)0; + } + if (ro->ro_rt == (struct rtentry *)0 || + ro->ro_rt->rt_ifp == (struct ifnet *)0) { + /* No route yet, so try to acquire one */ + bzero(&ro->ro_dst, sizeof(struct sockaddr_in6)); + ro->ro_dst.sin6_family = AF_INET6; + ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); + ro->ro_dst.sin6_addr = *dst; + if (IN6_IS_ADDR_MULTICAST(dst)) { + ro->ro_rt = rtalloc1(&((struct route *)ro) + ->ro_dst, 0, 0UL); + } else { + rtcalloc((struct route *)ro); + } + } + + /* + * in_pcbconnect() checks out IFF_LOOPBACK to skip using + * the address. But we don't know why it does so. + * It is necessary to ensure the scope even for lo0 + * so doesn't check out IFF_LOOPBACK. + */ + + if (ro->ro_rt) { + ia6 = in6_ifawithscope(ro->ro_rt->rt_ifa->ifa_ifp, dst); + if (ia6 == 0) /* xxx scope error ?*/ + ia6 = ifatoia6(ro->ro_rt->rt_ifa); + } + if (ia6 == 0) { + *errorp = EHOSTUNREACH; /* no route */ + return(0); + } + return(&satosin6(&ia6->ia_addr)->sin6_addr); + } + + *errorp = EADDRNOTAVAIL; + return(0); +} + +/* + * Default hop limit selection. The precedence is as follows: + * 1. Hoplimit valued specified via ioctl. + * 2. (If the outgoing interface is detected) the current + * hop limit of the interface specified by router advertisement. + * 3. The system default hoplimit. +*/ +int +in6_selecthlim(in6p, ifp) + struct in6pcb *in6p; + struct ifnet *ifp; +{ + if (in6p && in6p->in6p_hops >= 0) + return(in6p->in6p_hops); + else if (ifp) + return(nd_ifinfo[ifp->if_index].chlim); + else + return(ip6_defhlim); +} + +void +in6_pcbdisconnect(inp) + struct inpcb *inp; +{ + bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); + inp->inp_fport = 0; + in_pcbrehash(inp); + if (inp->inp_socket->so_state & SS_NOFDREF) + in6_pcbdetach(inp); +} + +void +in6_pcbdetach(inp) + struct inpcb *inp; +{ + struct socket *so = inp->inp_socket; + struct inpcbinfo *ipi = inp->inp_pcbinfo; + +#ifdef IPSEC + if (sotoinpcb(so) != 0) + key_freeso(so); + ipsec6_delete_pcbpolicy(inp); +#endif /* IPSEC */ + inp->inp_gencnt = ++ipi->ipi_gencnt; + in_pcbremlists(inp); + sotoinpcb(so) = 0; + sofree(so); + if (inp->in6p_options) + m_freem(inp->in6p_options); + if (inp->in6p_outputopts) { + if (inp->in6p_outputopts->ip6po_rthdr && + inp->in6p_outputopts->ip6po_route.ro_rt) + RTFREE(inp->in6p_outputopts->ip6po_route.ro_rt); + if (inp->in6p_outputopts->ip6po_m) + (void)m_free(inp->in6p_outputopts->ip6po_m); + free(inp->in6p_outputopts, M_IP6OPT); + } + if (inp->in6p_route.ro_rt) + rtfree(inp->in6p_route.ro_rt); + ip6_freemoptions(inp->in6p_moptions); + inp->inp_vflag = 0; + zfreei(ipi->ipi_zone, inp); +} + +/* + * The calling convention of in6_setsockaddr() and in6_setpeeraddr() was + * modified to match the pru_sockaddr() and pru_peeraddr() entry points + * in struct pr_usrreqs, so that protocols can just reference then directly + * without the need for a wrapper function. The socket must have a valid + * (i.e., non-nil) PCB, but it should be impossible to get an invalid one + * except through a kernel programming error, so it is acceptable to panic + * (or in this case trap) if the PCB is invalid. (Actually, we don't trap + * because there actually /is/ a programming error somewhere... XXX) + */ +int +in6_setsockaddr(so, nam) + struct socket *so; + struct sockaddr **nam; +{ + int s; + register struct inpcb *inp; + register struct sockaddr_in6 *sin6; + + /* + * Do the malloc first in case it blocks. + */ + MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6, M_SONAME, M_WAITOK); + bzero(sin6, sizeof *sin6); + sin6->sin6_family = AF_INET6; + sin6->sin6_len = sizeof(*sin6); + + s = splnet(); + inp = sotoinpcb(so); + if (!inp) { + splx(s); + free(sin6, M_SONAME); + return EINVAL; + } + sin6->sin6_port = inp->inp_lport; + sin6->sin6_addr = inp->in6p_laddr; + splx(s); + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); + else + sin6->sin6_scope_id = 0; /*XXX*/ + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + sin6->sin6_addr.s6_addr16[1] = 0; + + *nam = (struct sockaddr *)sin6; + return 0; +} + +int +in6_setpeeraddr(so, nam) + struct socket *so; + struct sockaddr **nam; +{ + int s; + struct inpcb *inp; + register struct sockaddr_in6 *sin6; + + /* + * Do the malloc first in case it blocks. + */ + MALLOC(sin6, struct sockaddr_in6 *, sizeof(*sin6), M_SONAME, M_WAITOK); + bzero((caddr_t)sin6, sizeof (*sin6)); + sin6->sin6_family = AF_INET6; + sin6->sin6_len = sizeof(struct sockaddr_in6); + + s = splnet(); + inp = sotoinpcb(so); + if (!inp) { + splx(s); + free(sin6, M_SONAME); + return EINVAL; + } + sin6->sin6_port = inp->inp_fport; + sin6->sin6_addr = inp->in6p_faddr; + splx(s); + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); + else + sin6->sin6_scope_id = 0; /*XXX*/ + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + sin6->sin6_addr.s6_addr16[1] = 0; + + *nam = (struct sockaddr *)sin6; + return 0; +} + +int +in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) +{ + struct inpcb *inp = sotoinpcb(so); + int error; + + if (inp == NULL) + return EINVAL; + if (inp->inp_vflag & INP_IPV4) { + error = in_setsockaddr(so, nam); + if (error == NULL) + in6_sin_2_v4mapsin6_in_sock(nam); + } else + error = in6_setsockaddr(so, nam); + + return error; +} + +int +in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) +{ + struct inpcb *inp = sotoinpcb(so); + int error; + + if (inp == NULL) + return EINVAL; + if (inp->inp_vflag & INP_IPV4) { + error = in_setpeeraddr(so, nam); + if (error == NULL) + in6_sin_2_v4mapsin6_in_sock(nam); + } else + error = in6_setpeeraddr(so, nam); + + return error; +} + +/* + * Pass some notification to all connections of a protocol + * associated with address dst. The local address and/or port numbers + * may be specified to limit the search. The "usual action" will be + * taken, depending on the ctlinput cmd. The caller must filter any + * cmds that are uninteresting (e.g., no error in the map). + * Call the protocol specific routine (if any) to report + * any errors for each matching socket. + * + * Must be called at splnet. + */ +void +in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) + struct inpcbhead *head; + struct sockaddr *dst; + u_int fport_arg, lport_arg; + struct in6_addr *laddr6; + int cmd; + void (*notify) __P((struct inpcb *, int)); +{ + struct inpcb *inp, *oinp; + struct in6_addr faddr6; + u_short fport = fport_arg, lport = lport_arg; + int errno, s; + + if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) + return; + faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; + if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) + return; + + /* + * Redirects go to all references to the destination, + * and use in_rtchange to invalidate the route cache. + * Dead host indications: notify all references to the destination. + * Otherwise, if we have knowledge of the local port and address, + * deliver only to that socket. + */ + if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { + fport = 0; + lport = 0; + bzero((caddr_t)laddr6, sizeof(*laddr6)); + if (cmd != PRC_HOSTDEAD) + notify = in6_rtchange; + } + errno = inet6ctlerrmap[cmd]; + s = splnet(); + for (inp = LIST_FIRST(head); inp != NULL;) { + if ((inp->inp_vflag & INP_IPV6) == NULL) { + inp = LIST_NEXT(inp, inp_list); + continue; + } + if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &faddr6) || + inp->inp_socket == 0 || + (lport && inp->inp_lport != lport) || + (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && + !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr6)) || + (fport && inp->inp_fport != fport)) { + inp = LIST_NEXT(inp, inp_list); + continue; + } + oinp = inp; + inp = LIST_NEXT(inp, inp_list); + if (notify) + (*notify)(oinp, errno); + } + splx(s); +} + +/* + * Lookup a PCB based on the local address and port. + */ +struct inpcb * +in6_pcblookup_local(pcbinfo, laddr, lport_arg, wild_okay) + struct inpcbinfo *pcbinfo; + struct in6_addr *laddr; + u_int lport_arg; + int wild_okay; +{ + register struct inpcb *inp; + int matchwild = 3, wildcard; + u_short lport = lport_arg; + + if (!wild_okay) { + struct inpcbhead *head; + /* + * Look for an unconnected (wildcard foreign addr) PCB that + * matches the local address and port we're looking for. + */ + head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, + pcbinfo->hashmask)]; + LIST_FOREACH(inp, head, inp_hash) { + if ((inp->inp_vflag & INP_IPV6) == NULL) + continue; + if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && + IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && + inp->inp_lport == lport) { + /* + * Found. + */ + return (inp); + } + } + /* + * Not found. + */ + return (NULL); + } else { + struct inpcbporthead *porthash; + struct inpcbport *phd; + struct inpcb *match = NULL; + /* + * Best fit PCB lookup. + * + * First see if this local port is in use by looking on the + * port hash list. + */ + porthash = &pcbinfo->porthashbase[INP_PCBPORTHASH(lport, + pcbinfo->porthashmask)]; + LIST_FOREACH(phd, porthash, phd_hash) { + if (phd->phd_port == lport) + break; + } + if (phd != NULL) { + /* + * Port is in use by one or more PCBs. Look for best + * fit. + */ + LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { + wildcard = 0; + if ((inp->inp_vflag & INP_IPV6) == NULL) + continue; + if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) + wildcard++; + if (!IN6_IS_ADDR_UNSPECIFIED( + &inp->in6p_laddr)) { + if (IN6_IS_ADDR_UNSPECIFIED(laddr)) + wildcard++; + else if (!IN6_ARE_ADDR_EQUAL( + &inp->in6p_laddr, laddr)) + continue; + } else { + if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) + wildcard++; + } + if (wildcard < matchwild) { + match = inp; + matchwild = wildcard; + if (matchwild == 0) { + break; + } + } + } + } + return (match); + } +} + +/* + * Check for alternatives when higher level complains + * about service problems. For now, invalidate cached + * routing information. If the route was created dynamically + * (by a redirect), time to try a default gateway again. + */ +void +in6_losing(in6p) + struct inpcb *in6p; +{ + struct rtentry *rt; + struct rt_addrinfo info; + + if ((rt = in6p->in6p_route.ro_rt) != NULL) { + in6p->in6p_route.ro_rt = 0; + bzero((caddr_t)&info, sizeof(info)); + info.rti_info[RTAX_DST] = + (struct sockaddr *)&in6p->in6p_route.ro_dst; + info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; + info.rti_info[RTAX_NETMASK] = rt_mask(rt); + rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); + if (rt->rt_flags & RTF_DYNAMIC) + (void)rtrequest(RTM_DELETE, rt_key(rt), + rt->rt_gateway, rt_mask(rt), rt->rt_flags, + (struct rtentry **)0); + else + /* + * A new route can be allocated + * the next time output is attempted. + */ + rtfree(rt); + } +} + +/* + * After a routing change, flush old routing + * and allocate a (hopefully) better one. + */ +void +in6_rtchange(inp, errno) + struct inpcb *inp; + int errno; +{ + if (inp->in6p_route.ro_rt) { + rtfree(inp->in6p_route.ro_rt); + inp->in6p_route.ro_rt = 0; + /* + * A new route can be allocated the next time + * output is attempted. + */ + } +} + +/* + * Lookup PCB in hash list. + */ +struct inpcb * +in6_pcblookup_hash(pcbinfo, faddr, fport_arg, laddr, lport_arg, wildcard, ifp) + struct inpcbinfo *pcbinfo; + struct in6_addr *faddr, *laddr; + u_int fport_arg, lport_arg; + int wildcard; + struct ifnet *ifp; +{ + struct inpcbhead *head; + register struct inpcb *inp; + u_short fport = fport_arg, lport = lport_arg; + + /* + * First look for an exact match. + */ + head = &pcbinfo->hashbase[INP_PCBHASH(faddr->s6_addr32[3] /* XXX */, + lport, fport, + pcbinfo->hashmask)]; + for (inp = head->lh_first; inp != NULL; inp = inp->inp_hash.le_next) { + if ((inp->inp_vflag & INP_IPV6) == NULL) + continue; + if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && + IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && + inp->inp_fport == fport && + inp->inp_lport == lport) { + /* + * Found. + */ + return (inp); + } + } + if (wildcard) { + struct inpcb *local_wild = NULL; + + head = &pcbinfo->hashbase[INP_PCBHASH(INADDR_ANY, lport, 0, + pcbinfo->hashmask)]; + for (inp = head->lh_first; inp != NULL; + inp = inp->inp_hash.le_next) { + if ((inp->inp_vflag & INP_IPV6) == NULL) + continue; + if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && + inp->inp_lport == lport) { +#if defined(NFAITH) && NFAITH > 0 + if (ifp && ifp->if_type == IFT_FAITH && + (inp->inp_flags & INP_FAITH) == 0) + continue; +#endif + if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, + laddr)) + return (inp); + else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) + local_wild = inp; + } + } + return (local_wild); + } + + /* + * Not found. + */ + return (NULL); +} + +void +init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m) +{ + struct ip6_hdr *ip; + + ip = mtod(m, struct ip6_hdr *); + bzero(sin6, sizeof(*sin6)); + sin6->sin6_len = sizeof(*sin6); + sin6->sin6_family = AF_INET6; + sin6->sin6_addr = ip->ip6_src; + if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + sin6->sin6_addr.s6_addr16[1] = 0; + sin6->sin6_scope_id = + (m->m_pkthdr.rcvif && IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) + ? m->m_pkthdr.rcvif->if_index : 0; + + return; +} |
