diff options
Diffstat (limited to 'sys/netinet6/in6.c')
| -rw-r--r-- | sys/netinet6/in6.c | 1879 |
1 files changed, 1879 insertions, 0 deletions
diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c new file mode 100644 index 0000000..291b672 --- /dev/null +++ b/sys/netinet6/in6.c @@ -0,0 +1,1879 @@ +/* + * 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.c 8.2 (Berkeley) 11/15/93 + */ + +#include "opt_inet.h" + +#include <sys/param.h> +#include <sys/errno.h> +#include <sys/malloc.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sockio.h> +#include <sys/systm.h> +#include <sys/proc.h> +#include <sys/time.h> +#include <sys/kernel.h> +#include <sys/syslog.h> + +#include <net/if.h> +#include <net/if_types.h> +#include <net/route.h> +/* #include "gif.h" */ +#if NGIF > 0 +#include <net/if_gif.h> +#endif +#include <net/if_dl.h> + +#include <netinet/in.h> +#include <netinet/in_var.h> +#include <netinet/if_ether.h> + +#include <netinet6/nd6.h> +#include <netinet6/ip6.h> +#include <netinet6/ip6_var.h> +#include <netinet6/mld6_var.h> +#include <netinet6/in6_ifattach.h> + +#include <net/net_osdep.h> + +MALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address"); + +/* + * Definitions of some costant IP6 addresses. + */ +const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT; +const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT; +const struct in6_addr in6addr_nodelocal_allnodes = + IN6ADDR_NODELOCAL_ALLNODES_INIT; +const struct in6_addr in6addr_linklocal_allnodes = + IN6ADDR_LINKLOCAL_ALLNODES_INIT; +const struct in6_addr in6addr_linklocal_allrouters = + IN6ADDR_LINKLOCAL_ALLROUTERS_INIT; + +const struct in6_addr in6mask0 = IN6MASK0; +const struct in6_addr in6mask32 = IN6MASK32; +const struct in6_addr in6mask64 = IN6MASK64; +const struct in6_addr in6mask96 = IN6MASK96; +const struct in6_addr in6mask128 = IN6MASK128; + +static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t, + struct ifnet *, struct proc *)); +struct in6_multihead in6_multihead; /* XXX BSS initialization */ + +/* + * Determine whether an IP6 address is in a reserved set of addresses + * that may not be forwarded, or whether datagrams to that destination + * may be forwarded. + */ +int +in6_canforward(src, dst) + struct in6_addr *src, *dst; +{ + if (IN6_IS_ADDR_LINKLOCAL(src) || + IN6_IS_ADDR_LINKLOCAL(dst) || + IN6_IS_ADDR_MULTICAST(dst)) + return(0); + return(1); +} + +/* + * Check if the loopback entry will be automatically generated. + * if 0 returned, will not be automatically generated. + * if 1 returned, will be automatically generated. + */ +static int +in6_is_ifloop_auto(struct ifaddr *ifa) +{ +#define SIN6(s) ((struct sockaddr_in6 *)s) + /* + * If RTF_CLONING is unset, or (IFF_LOOPBACK | IFF_POINTOPOINT), + * or netmask is all0 or all1, then cloning will not happen, + * then we can't rely on its loopback entry generation. + */ + if ((ifa->ifa_flags & RTF_CLONING) == 0 || + (ifa->ifa_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) || + (SIN6(ifa->ifa_netmask)->sin6_len == sizeof(struct sockaddr_in6) + && + IN6_ARE_ADDR_EQUAL(&SIN6(ifa->ifa_netmask)->sin6_addr, + &in6mask128)) || + ((struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_len == 0) + return 0; + else + return 1; +#undef SIN6 +} + +/* + * Subroutine for in6_ifaddloop() and in6_ifremloop(). + * This routine does actual work. + */ +static void +in6_ifloop_request(int cmd, struct ifaddr *ifa) +{ + struct sockaddr_in6 lo_sa; + struct sockaddr_in6 all1_sa; + struct rtentry *nrt = NULL; + + bzero(&lo_sa, sizeof(lo_sa)); + bzero(&all1_sa, sizeof(all1_sa)); + lo_sa.sin6_family = AF_INET6; + lo_sa.sin6_len = sizeof(struct sockaddr_in6); + all1_sa = lo_sa; + lo_sa.sin6_addr = in6addr_loopback; + all1_sa.sin6_addr = in6mask128; + + /* So we add or remove static loopback entry, here. */ + rtrequest(cmd, ifa->ifa_addr, + (struct sockaddr *)&lo_sa, + (struct sockaddr *)&all1_sa, + RTF_UP|RTF_HOST, &nrt); + + /* + * Make sure rt_ifa be equal to IFA, the second argument of the + * function. + * We need this because when we refer rt_ifa->ia6_flags in ip6_input, + * we assume that the rt_ifa points to the address instead of the + * loopback address. + */ + if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) { + nrt->rt_ifa->ifa_refcnt--; + ifa->ifa_refcnt++; + nrt->rt_ifa = ifa; + } + if (nrt) + nrt->rt_refcnt--; +} + +/* + * Add ownaddr as loopback rtentry, if necessary(ex. on p2p link). + * Because, KAME needs loopback rtentry for ownaddr check in + * ip6_input(). + */ +static void +in6_ifaddloop(struct ifaddr *ifa) +{ + if (!in6_is_ifloop_auto(ifa)) { + struct rtentry *rt; + + /* If there is no loopback entry, allocate one. */ + rt = rtalloc1(ifa->ifa_addr, 0, 0); + if (rt == 0 || (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0) + in6_ifloop_request(RTM_ADD, ifa); + if (rt) + rt->rt_refcnt--; + } +} + +/* + * Remove loopback rtentry of ownaddr generated by in6_ifaddloop(), + * if it exists. + */ +static void +in6_ifremloop(struct ifaddr *ifa) +{ + if (!in6_is_ifloop_auto(ifa)) { + struct in6_ifaddr *ia; + int ia_count = 0; + + /* If only one ifa for the loopback entry, delete it. */ + for (ia = in6_ifaddr; ia; ia = ia->ia_next) { + if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), + &ia->ia_addr.sin6_addr)) { + ia_count++; + if (ia_count > 1) + break; + } + } + if (ia_count == 1) + in6_ifloop_request(RTM_DELETE, ifa); + } +} + +/* + * Subroutine for in6_ifaddproxy() and in6_ifremproxy(). + * This routine does actual work. + * call in6_addmulti() when cmd == 1. + * call in6_delmulti() when cmd == 2. + */ +static int +in6_ifproxy_request(int cmd, struct in6_ifaddr *ia) +{ + int error = 0; + + /* + * If we have an IPv6 dstaddr on adding p2p interface, + * join dstaddr's solicited multicast on necessary interface. + */ + if ((ia->ia_ifp->if_flags & IFF_POINTOPOINT) && + ia->ia_dstaddr.sin6_family == AF_INET6 && + !IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) { + struct in6_ifaddr *ia_lan; + + /* + * TODO: Join only on some specified interfaces by some + * configuration. + * Unsolicited Neighbor Advertisements will be also necessary. + * + * Now, join on interfaces which meets following. + * -IFF_BROADCAST and IFF_MULTICAST + * (NBMA is out of scope) + * -the prefix value is same as p2p dstaddr + */ + for (ia_lan = in6_ifaddr; ia_lan; ia_lan = ia_lan->ia_next) { + struct in6_addr llsol; + + if ((ia_lan->ia_ifp->if_flags & + (IFF_BROADCAST|IFF_MULTICAST)) != + (IFF_BROADCAST|IFF_MULTICAST)) + continue; + if (!IN6_ARE_MASKED_ADDR_EQUAL(IA6_IN6(ia), + IA6_IN6(ia_lan), + IA6_MASKIN6(ia_lan))) + continue; + if (ia_lan->ia_ifp == ia->ia_ifp) + continue; + + /* init llsol */ + bzero(&llsol, sizeof(struct in6_addr)); + llsol.s6_addr16[0] = htons(0xff02); + llsol.s6_addr16[1] = htons(ia_lan->ia_ifp->if_index); + llsol.s6_addr32[1] = 0; + llsol.s6_addr32[2] = htonl(1); + llsol.s6_addr32[3] = + ia->ia_dstaddr.sin6_addr.s6_addr32[3]; + llsol.s6_addr8[12] = 0xff; + + if (cmd == 1) + (void)in6_addmulti(&llsol, + ia_lan->ia_ifp, + &error); + else if (cmd == 2) { + struct in6_multi *in6m; + + IN6_LOOKUP_MULTI(llsol, + ia_lan->ia_ifp, + in6m); + if (in6m) + in6_delmulti(in6m); + } + } + } + return error; +} + +static int +in6_ifaddproxy(struct in6_ifaddr *ia) +{ + return(in6_ifproxy_request(1, ia)); +} + +static void +in6_ifremproxy(struct in6_ifaddr *ia) +{ + in6_ifproxy_request(2, ia); +} + +int +in6_ifindex2scopeid(idx) + int idx; +{ + struct ifnet *ifp; + struct ifaddr *ifa; + struct sockaddr_in6 *sin6; + + if (idx < 0 || if_index < idx) + return -1; + ifp = ifindex2ifnet[idx]; + + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; + if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) + return sin6->sin6_scope_id & 0xffff; + } + + return -1; +} + +int +in6_mask2len(mask) + struct in6_addr *mask; +{ + int x, y; + + for (x = 0; x < sizeof(*mask); x++) { + if (mask->s6_addr8[x] != 0xff) + break; + } + y = 0; + if (x < sizeof(*mask)) { + for (y = 0; y < 8; y++) { + if ((mask->s6_addr8[x] & (0x80 >> y)) == 0) + break; + } + } + return x * 8 + y; +} + +void +in6_len2mask(mask, len) + struct in6_addr *mask; + int len; +{ + int i; + + bzero(mask, sizeof(*mask)); + for (i = 0; i < len / 8; i++) + mask->s6_addr8[i] = 0xff; + if (len % 8) + mask->s6_addr8[i] = (0xff00 >> (len % 8)) & 0xff; +} + +int in6_interfaces; /* number of external internet interfaces */ + +#define ifa2ia6(ifa) ((struct in6_ifaddr *)(ifa)) +#define ia62ifa(ia6) ((struct ifaddr *)(ia6)) + +int +in6_control(so, cmd, data, ifp, p) + struct socket *so; + u_long cmd; + caddr_t data; + struct ifnet *ifp; + struct proc *p; +{ + struct in6_ifreq *ifr = (struct in6_ifreq *)data; + struct in6_ifaddr *ia, *oia; + struct in6_aliasreq *ifra = (struct in6_aliasreq *)data; + struct sockaddr_in6 oldaddr, net; + int error = 0, hostIsNew, prefixIsNew; + int privileged; + + privileged = 0; + if (p && !suser(p)) + privileged++; + + /* + * xxx should prevent processes for link-local addresses? + */ +#if NGIF > 0 + if (ifp && ifp->if_type == IFT_GIF) { + switch (cmd) { + case SIOCSIFPHYADDR_IN6: + if (!privileged) + return(EPERM); + /*fall through*/ + case SIOCGIFPSRCADDR_IN6: + case SIOCGIFPDSTADDR_IN6: + return gif_ioctl(ifp, cmd, data); + } + } +#endif + + if (ifp == 0) + return(EOPNOTSUPP); + + switch (cmd) { + case SIOCSNDFLUSH_IN6: + case SIOCSPFXFLUSH_IN6: + case SIOCSRTRFLUSH_IN6: + if (!privileged) + return(EPERM); + /*fall through*/ + case SIOCGIFINFO_IN6: + case SIOCGDRLST_IN6: + case SIOCGPRLST_IN6: + case SIOCGNBRINFO_IN6: + return(nd6_ioctl(cmd, data, ifp)); + } + + switch (cmd) { + case SIOCSIFPREFIX_IN6: + case SIOCDIFPREFIX_IN6: + case SIOCAIFPREFIX_IN6: + case SIOCCIFPREFIX_IN6: + case SIOCSGIFPREFIX_IN6: + if (!privileged) + return(EPERM); + /*fall through*/ + case SIOCGIFPREFIX_IN6: + return(in6_prefix_ioctl(so, cmd, data, ifp)); + } + + switch (cmd) { + case SIOCALIFADDR: + case SIOCDLIFADDR: + if (!privileged) + return(EPERM); + /*fall through*/ + case SIOCGLIFADDR: + return in6_lifaddr_ioctl(so, cmd, data, ifp, p); + } + + /* + * Find address for this interface, if it exists. + */ + { + + struct sockaddr_in6 *sa6 = + (struct sockaddr_in6 *)&ifra->ifra_addr; + + if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) { + if (sa6->sin6_addr.s6_addr16[1] == 0) { + /* interface ID is not embedded by the user */ + sa6->sin6_addr.s6_addr16[1] = + htons(ifp->if_index); + } else + if (sa6->sin6_addr.s6_addr16[1] != + htons(ifp->if_index)) + return(EINVAL); /* ifid is contradict */ + if (sa6->sin6_scope_id) { + if (sa6->sin6_scope_id != + (u_int32_t)ifp->if_index) + return(EINVAL); + sa6->sin6_scope_id = 0; /* XXX: good way? */ + } + } + } + ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr); + + switch (cmd) { + + case SIOCDIFADDR_IN6: + if (ia == 0) + return(EADDRNOTAVAIL); + /* FALLTHROUGH */ + case SIOCAIFADDR_IN6: + case SIOCSIFADDR_IN6: + case SIOCSIFNETMASK_IN6: + case SIOCSIFDSTADDR_IN6: + if (!privileged) + return(EPERM); + if (ia == 0) { + ia = (struct in6_ifaddr *) + malloc(sizeof(*ia), M_IFADDR, M_WAITOK); + if (ia == NULL) + return (ENOBUFS); + bzero((caddr_t)ia, sizeof(*ia)); + ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; + ia->ia_ifa.ifa_dstaddr + = (struct sockaddr *)&ia->ia_dstaddr; + ia->ia_ifa.ifa_netmask + = (struct sockaddr *)&ia->ia_prefixmask; + + ia->ia_ifp = ifp; + if ((oia = in6_ifaddr) != NULL) { + for ( ; oia->ia_next; oia = oia->ia_next) + continue; + oia->ia_next = ia; + } else + in6_ifaddr = ia; + TAILQ_INSERT_TAIL(&ifp->if_addrlist, + (struct ifaddr *)ia, ifa_list); + if ((ifp->if_flags & IFF_LOOPBACK) == 0) + in6_interfaces++; /*XXX*/ + } + + if (cmd == SIOCAIFADDR_IN6) { + /* sanity for overflow - beware unsigned */ + struct in6_addrlifetime *lt; + lt = &ifra->ifra_lifetime; + if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME + && lt->ia6t_vltime + time_second < time_second) { + return EINVAL; + } + if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME + && lt->ia6t_pltime + time_second < time_second) { + return EINVAL; + } + } + break; + + case SIOCGIFADDR_IN6: + /* This interface is basically deprecated. use SIOCGIFCONF. */ + /* fall through */ + case SIOCGIFAFLAG_IN6: + case SIOCGIFNETMASK_IN6: + case SIOCGIFDSTADDR_IN6: + case SIOCGIFALIFETIME_IN6: + /* must think again about its semantics */ + if (ia == 0) + return(EADDRNOTAVAIL); + break; + case SIOCSIFALIFETIME_IN6: + { + struct in6_addrlifetime *lt; + + if (!privileged) + return(EPERM); + if (ia == 0) + return(EADDRNOTAVAIL); + /* sanity for overflow - beware unsigned */ + lt = &ifr->ifr_ifru.ifru_lifetime; + if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME + && lt->ia6t_vltime + time_second < time_second) { + return EINVAL; + } + if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME + && lt->ia6t_pltime + time_second < time_second) { + return EINVAL; + } + break; + } + } + + switch (cmd) { + + case SIOCGIFADDR_IN6: + ifr->ifr_addr = ia->ia_addr; + break; + + case SIOCGIFDSTADDR_IN6: + if ((ifp->if_flags & IFF_POINTOPOINT) == 0) + return(EINVAL); + ifr->ifr_dstaddr = ia->ia_dstaddr; + break; + + case SIOCGIFNETMASK_IN6: + ifr->ifr_addr = ia->ia_prefixmask; + break; + + case SIOCGIFAFLAG_IN6: + ifr->ifr_ifru.ifru_flags6 = ia->ia6_flags; + break; + + case SIOCGIFSTAT_IN6: + if (ifp == NULL) + return EINVAL; + if (in6_ifstat == NULL || ifp->if_index >= in6_ifstatmax + || in6_ifstat[ifp->if_index] == NULL) { + /* return EAFNOSUPPORT? */ + bzero(&ifr->ifr_ifru.ifru_stat, + sizeof(ifr->ifr_ifru.ifru_stat)); + } else + ifr->ifr_ifru.ifru_stat = *in6_ifstat[ifp->if_index]; + break; + + case SIOCGIFSTAT_ICMP6: + if (ifp == NULL) + return EINVAL; + if (icmp6_ifstat == NULL || ifp->if_index >= icmp6_ifstatmax || + icmp6_ifstat[ifp->if_index] == NULL) { + /* return EAFNOSUPPORT? */ + bzero(&ifr->ifr_ifru.ifru_stat, + sizeof(ifr->ifr_ifru.ifru_icmp6stat)); + } else + ifr->ifr_ifru.ifru_icmp6stat = + *icmp6_ifstat[ifp->if_index]; + break; + + case SIOCSIFDSTADDR_IN6: + if ((ifp->if_flags & IFF_POINTOPOINT) == 0) + return(EINVAL); + oldaddr = ia->ia_dstaddr; + ia->ia_dstaddr = ifr->ifr_dstaddr; + + /* link-local index check */ + if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) { + if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] == 0) { + /* interface ID is not embedded by the user */ + ia->ia_dstaddr.sin6_addr.s6_addr16[1] + = htons(ifp->if_index); + } else + if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] != + htons(ifp->if_index)) { + ia->ia_dstaddr = oldaddr; + return(EINVAL); /* ifid is contradict */ + } + } + + if (ifp->if_ioctl && (error = (ifp->if_ioctl) + (ifp, SIOCSIFDSTADDR, (caddr_t)ia))) { + ia->ia_dstaddr = oldaddr; + return(error); + } + if (ia->ia_flags & IFA_ROUTE) { + ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); + ia->ia_ifa.ifa_dstaddr = + (struct sockaddr *)&ia->ia_dstaddr; + rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); + } + break; + + case SIOCGIFALIFETIME_IN6: + ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime; + break; + + case SIOCSIFALIFETIME_IN6: + ia->ia6_lifetime = ifr->ifr_ifru.ifru_lifetime; + /* for sanity */ + if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { + ia->ia6_lifetime.ia6t_expire = + time_second + ia->ia6_lifetime.ia6t_vltime; + } else + ia->ia6_lifetime.ia6t_expire = 0; + if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { + ia->ia6_lifetime.ia6t_preferred = + time_second + ia->ia6_lifetime.ia6t_pltime; + } else + ia->ia6_lifetime.ia6t_preferred = 0; + break; + + case SIOCSIFADDR_IN6: + return(in6_ifinit(ifp, ia, &ifr->ifr_addr, 1)); + + case SIOCSIFNETMASK_IN6: + ia->ia_prefixmask = ifr->ifr_addr; + bzero(&net, sizeof(net)); + net.sin6_len = sizeof(struct sockaddr_in6); + net.sin6_family = AF_INET6; + net.sin6_port = htons(0); + net.sin6_flowinfo = htonl(0); + net.sin6_addr.s6_addr32[0] + = ia->ia_addr.sin6_addr.s6_addr32[0] & + ia->ia_prefixmask.sin6_addr.s6_addr32[0]; + net.sin6_addr.s6_addr32[1] + = ia->ia_addr.sin6_addr.s6_addr32[1] & + ia->ia_prefixmask.sin6_addr.s6_addr32[1]; + net.sin6_addr.s6_addr32[2] + = ia->ia_addr.sin6_addr.s6_addr32[2] & + ia->ia_prefixmask.sin6_addr.s6_addr32[2]; + net.sin6_addr.s6_addr32[3] + = ia->ia_addr.sin6_addr.s6_addr32[3] & + ia->ia_prefixmask.sin6_addr.s6_addr32[3]; + ia->ia_net = net; + break; + + case SIOCAIFADDR_IN6: + prefixIsNew = 0; + hostIsNew = 1; + + if (ifra->ifra_addr.sin6_len == 0) { + ifra->ifra_addr = ia->ia_addr; + hostIsNew = 0; + } else if (IN6_ARE_ADDR_EQUAL(&ifra->ifra_addr.sin6_addr, + &ia->ia_addr.sin6_addr)) + hostIsNew = 0; + + if (ifra->ifra_prefixmask.sin6_len) { + in6_ifscrub(ifp, ia); + ia->ia_prefixmask = ifra->ifra_prefixmask; + prefixIsNew = 1; + } + if ((ifp->if_flags & IFF_POINTOPOINT) && + (ifra->ifra_dstaddr.sin6_family == AF_INET6)) { + in6_ifscrub(ifp, ia); + ia->ia_dstaddr = ifra->ifra_dstaddr; + /* link-local index check: should be a separate function? */ + if (IN6_IS_ADDR_LINKLOCAL(&ia->ia_dstaddr.sin6_addr)) { + if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] == 0) { + /* + * interface ID is not embedded by + * the user + */ + ia->ia_dstaddr.sin6_addr.s6_addr16[1] + = htons(ifp->if_index); + } else + if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] != + htons(ifp->if_index)) { + ia->ia_dstaddr = oldaddr; + return(EINVAL); /* ifid is contradict */ + } + } + prefixIsNew = 1; /* We lie; but effect's the same */ + } + if (ifra->ifra_addr.sin6_family == AF_INET6 && + (hostIsNew || prefixIsNew)) + error = in6_ifinit(ifp, ia, &ifra->ifra_addr, 0); + if (ifra->ifra_addr.sin6_family == AF_INET6 + && hostIsNew && (ifp->if_flags & IFF_MULTICAST)) { + int error_local = 0; + + /* + * join solicited multicast addr for new host id + */ + struct in6_addr llsol; + bzero(&llsol, sizeof(struct in6_addr)); + llsol.s6_addr16[0] = htons(0xff02); + llsol.s6_addr16[1] = htons(ifp->if_index); + llsol.s6_addr32[1] = 0; + llsol.s6_addr32[2] = htonl(1); + llsol.s6_addr32[3] = + ifra->ifra_addr.sin6_addr.s6_addr32[3]; + llsol.s6_addr8[12] = 0xff; + (void)in6_addmulti(&llsol, ifp, &error_local); + if (error == 0) + error = error_local; + } + /* Join dstaddr's solicited multicast if necessary. */ + if (nd6_proxyall && hostIsNew) { + int error_local; + + error_local = in6_ifaddproxy(ia); + if (error == 0) + error = error_local; + } + + ia->ia6_flags = ifra->ifra_flags; + ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/ + + ia->ia6_lifetime = ifra->ifra_lifetime; + /* for sanity */ + if (ia->ia6_lifetime.ia6t_vltime != ND6_INFINITE_LIFETIME) { + ia->ia6_lifetime.ia6t_expire = + time_second + ia->ia6_lifetime.ia6t_vltime; + } else + ia->ia6_lifetime.ia6t_expire = 0; + if (ia->ia6_lifetime.ia6t_pltime != ND6_INFINITE_LIFETIME) { + ia->ia6_lifetime.ia6t_preferred = + time_second + ia->ia6_lifetime.ia6t_pltime; + } else + ia->ia6_lifetime.ia6t_preferred = 0; + + /* + * Perform DAD, if needed. + * XXX It may be of use, if we can administratively + * disable DAD. + */ + switch (ifp->if_type) { + case IFT_ARCNET: + case IFT_ETHER: + case IFT_FDDI: + ia->ia6_flags |= IN6_IFF_TENTATIVE; + nd6_dad_start((struct ifaddr *)ia, NULL); + break; +#ifdef IFT_DUMMY + case IFT_DUMMY: +#endif + case IFT_FAITH: + case IFT_GIF: + case IFT_LOOP: + default: + break; + } + + if (hostIsNew) { + int iilen; + int error_local = 0; + + iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - + in6_mask2len(&ia->ia_prefixmask.sin6_addr); + error_local = in6_prefix_add_ifid(iilen, ia); + if (error == 0) + error = error_local; + } + + return(error); + + case SIOCDIFADDR_IN6: + in6_ifscrub(ifp, ia); + + if (ifp->if_flags & IFF_MULTICAST) { + /* + * delete solicited multicast addr for deleting host id + */ + struct in6_multi *in6m; + struct in6_addr llsol; + bzero(&llsol, sizeof(struct in6_addr)); + llsol.s6_addr16[0] = htons(0xff02); + llsol.s6_addr16[1] = htons(ifp->if_index); + llsol.s6_addr32[1] = 0; + llsol.s6_addr32[2] = htonl(1); + llsol.s6_addr32[3] = + ia->ia_addr.sin6_addr.s6_addr32[3]; + llsol.s6_addr8[12] = 0xff; + + IN6_LOOKUP_MULTI(llsol, ifp, in6m); + if (in6m) + in6_delmulti(in6m); + } + /* Leave dstaddr's solicited multicast if necessary. */ + if (nd6_proxyall) + in6_ifremproxy(ia); + + TAILQ_REMOVE(&ifp->if_addrlist, (struct ifaddr *)ia, ifa_list); + oia = ia; + if (oia == (ia = in6_ifaddr)) + in6_ifaddr = ia->ia_next; + else { + while (ia->ia_next && (ia->ia_next != oia)) + ia = ia->ia_next; + if (ia->ia_next) + ia->ia_next = oia->ia_next; + else + printf("Didn't unlink in6_ifaddr from list\n"); + } + { + int iilen; + + iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - + in6_mask2len(&oia->ia_prefixmask.sin6_addr); + in6_prefix_remove_ifid(iilen, oia); + } + IFAFREE((&oia->ia_ifa)); + break; + + default: + if (ifp == 0 || ifp->if_ioctl == 0) + return(EOPNOTSUPP); + return((*ifp->if_ioctl)(ifp, cmd, data)); + } + return(0); +} + +/* + * SIOC[GAD]LIFADDR. + * SIOCGLIFADDR: get first address. (???) + * SIOCGLIFADDR with IFLR_PREFIX: + * get first address that matches the specified prefix. + * SIOCALIFADDR: add the specified address. + * SIOCALIFADDR with IFLR_PREFIX: + * add the specified prefix, filling hostid part from + * the first link-local address. prefixlen must be <= 64. + * SIOCDLIFADDR: delete the specified address. + * SIOCDLIFADDR with IFLR_PREFIX: + * delete the first address that matches the specified prefix. + * return values: + * EINVAL on invalid parameters + * EADDRNOTAVAIL on prefix match failed/specified address not found + * other values may be returned from in6_ioctl() + * + * NOTE: SIOCALIFADDR(with IFLR_PREFIX set) allows prefixlen less than 64. + * this is to accomodate address naming scheme other than RFC2374, + * in the future. + * RFC2373 defines interface id to be 64bit, but it allows non-RFC2374 + * address encoding scheme. (see figure on page 8) + */ +static int +in6_lifaddr_ioctl(so, cmd, data, ifp, p) + struct socket *so; + u_long cmd; + caddr_t data; + struct ifnet *ifp; + struct proc *p; +{ + struct if_laddrreq *iflr = (struct if_laddrreq *)data; + struct ifaddr *ifa; + + /* sanity checks */ + if (!data || !ifp) { + panic("invalid argument to in6_lifaddr_ioctl"); + /*NOTRECHED*/ + } + + switch (cmd) { + case SIOCGLIFADDR: + /* address must be specified on GET with IFLR_PREFIX */ + if ((iflr->flags & IFLR_PREFIX) == 0) + break; + /*FALLTHROUGH*/ + case SIOCALIFADDR: + case SIOCDLIFADDR: + /* address must be specified on ADD and DELETE */ + if (iflr->addr.__ss_family != AF_INET6) + return EINVAL; + if (iflr->addr.__ss_len != sizeof(struct sockaddr_in6)) + return EINVAL; + /* XXX need improvement */ + if (iflr->dstaddr.__ss_family + && iflr->dstaddr.__ss_family != AF_INET6) + return EINVAL; + if (iflr->dstaddr.__ss_family + && iflr->dstaddr.__ss_len != sizeof(struct sockaddr_in6)) + return EINVAL; + break; + default: /*shouldn't happen*/ + return EOPNOTSUPP; + } + if (sizeof(struct in6_addr) * 8 < iflr->prefixlen) + return EINVAL; + + switch (cmd) { + case SIOCALIFADDR: + { + struct in6_aliasreq ifra; + struct in6_addr *hostid = NULL; + int prefixlen; + + if ((iflr->flags & IFLR_PREFIX) != 0) { + struct sockaddr_in6 *sin6; + + /* + * hostid is to fill in the hostid part of the + * address. hostid points to the first link-local + * address attached to the interface. + */ + ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp); + if (!ifa) + return EADDRNOTAVAIL; + hostid = IFA_IN6(ifa); + + /* prefixlen must be <= 64. */ + if (64 < iflr->prefixlen) + return EINVAL; + prefixlen = iflr->prefixlen; + + /* hostid part must be zero. */ + sin6 = (struct sockaddr_in6 *)&iflr->addr; + if (sin6->sin6_addr.s6_addr32[2] != 0 + || sin6->sin6_addr.s6_addr32[3] != 0) { + return EINVAL; + } + } else + prefixlen = iflr->prefixlen; + + /* copy args to in6_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ + bzero(&ifra, sizeof(ifra)); + bcopy(iflr->iflr_name, ifra.ifra_name, + sizeof(ifra.ifra_name)); + + bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.__ss_len); + if (hostid) { + /* fill in hostid part */ + ifra.ifra_addr.sin6_addr.s6_addr32[2] = + hostid->s6_addr32[2]; + ifra.ifra_addr.sin6_addr.s6_addr32[3] = + hostid->s6_addr32[3]; + } + + if (iflr->dstaddr.__ss_family) { /*XXX*/ + bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, + iflr->dstaddr.__ss_len); + if (hostid) { + ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] = + hostid->s6_addr32[2]; + ifra.ifra_dstaddr.sin6_addr.s6_addr32[3] = + hostid->s6_addr32[3]; + } + } + + ifra.ifra_prefixmask.sin6_family = AF_INET6; + ifra.ifra_prefixmask.sin6_len = sizeof(struct sockaddr_in6); + in6_len2mask(&ifra.ifra_prefixmask.sin6_addr, prefixlen); + + ifra.ifra_flags = iflr->flags & ~IFLR_PREFIX; + return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p); + } + case SIOCGLIFADDR: + case SIOCDLIFADDR: + { + struct in6_ifaddr *ia; + struct in6_addr mask, candidate, match; + struct sockaddr_in6 *sin6; + int cmp; + + bzero(&mask, sizeof(mask)); + if (iflr->flags & IFLR_PREFIX) { + /* lookup a prefix rather than address. */ + in6_len2mask(&mask, iflr->prefixlen); + + sin6 = (struct sockaddr_in6 *)&iflr->addr; + bcopy(&sin6->sin6_addr, &match, sizeof(match)); + match.s6_addr32[0] &= mask.s6_addr32[0]; + match.s6_addr32[1] &= mask.s6_addr32[1]; + match.s6_addr32[2] &= mask.s6_addr32[2]; + match.s6_addr32[3] &= mask.s6_addr32[3]; + + /* if you set extra bits, that's wrong */ + if (bcmp(&match, &sin6->sin6_addr, sizeof(match))) + return EINVAL; + + cmp = 1; + } else { + if (cmd == SIOCGLIFADDR) { + /* on getting an address, take the 1st match */ + cmp = 0; /*XXX*/ + } else { + /* on deleting an address, do exact match */ + in6_len2mask(&mask, 128); + sin6 = (struct sockaddr_in6 *)&iflr->addr; + bcopy(&sin6->sin6_addr, &match, sizeof(match)); + + cmp = 1; + } + } + + for (ifa = ifp->if_addrlist.tqh_first; + ifa; + ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (!cmp) + break; + bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate)); + candidate.s6_addr32[0] &= mask.s6_addr32[0]; + candidate.s6_addr32[1] &= mask.s6_addr32[1]; + candidate.s6_addr32[2] &= mask.s6_addr32[2]; + candidate.s6_addr32[3] &= mask.s6_addr32[3]; + if (IN6_ARE_ADDR_EQUAL(&candidate, &match)) + break; + } + if (!ifa) + return EADDRNOTAVAIL; + ia = ifa2ia6(ifa); + + if (cmd == SIOCGLIFADDR) { + /* fill in the if_laddrreq structure */ + bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len); + + if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { + bcopy(&ia->ia_dstaddr, &iflr->dstaddr, + ia->ia_dstaddr.sin6_len); + } else + bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); + + iflr->prefixlen = + in6_mask2len(&ia->ia_prefixmask.sin6_addr); + + iflr->flags = ia->ia6_flags; /*XXX*/ + + return 0; + } else { + struct in6_aliasreq ifra; + + /* fill in6_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ + bzero(&ifra, sizeof(ifra)); + bcopy(iflr->iflr_name, ifra.ifra_name, + sizeof(ifra.ifra_name)); + + bcopy(&ia->ia_addr, &ifra.ifra_addr, + ia->ia_addr.sin6_len); + if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { + bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, + ia->ia_dstaddr.sin6_len); + } + bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr, + ia->ia_prefixmask.sin6_len); + + ifra.ifra_flags = ia->ia6_flags; + return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra, + ifp, p); + } + } + } + + return EOPNOTSUPP; /*just for safety*/ +} + +/* + * Delete any existing route for an interface. + */ +void +in6_ifscrub(ifp, ia) + register struct ifnet *ifp; + register struct in6_ifaddr *ia; +{ + if ((ia->ia_flags & IFA_ROUTE) == 0) + return; + if (ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); + else + rtinit(&(ia->ia_ifa), (int)RTM_DELETE, 0); + ia->ia_flags &= ~IFA_ROUTE; + + /* Remove ownaddr's loopback rtentry, if it exists. */ + in6_ifremloop(&(ia->ia_ifa)); +} + +/* + * Initialize an interface's intetnet6 address + * and routing table entry. + */ +int +in6_ifinit(ifp, ia, sin6, scrub) + struct ifnet *ifp; + struct in6_ifaddr *ia; + struct sockaddr_in6 *sin6; + int scrub; +{ + struct sockaddr_in6 oldaddr; + int error, flags = RTF_UP; + int s = splimp(); + + oldaddr = ia->ia_addr; + ia->ia_addr = *sin6; + /* + * Give the interface a chance to initialize + * if this is its first address, + * and to validate the address if necessary. + */ + if (ifp->if_ioctl && + (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) { + splx(s); + ia->ia_addr = oldaddr; + return(error); + } + + switch (ifp->if_type) { + case IFT_ARCNET: + case IFT_ETHER: + case IFT_FDDI: + ia->ia_ifa.ifa_rtrequest = nd6_rtrequest; + ia->ia_ifa.ifa_flags |= RTF_CLONING; + break; + case IFT_PPP: + ia->ia_ifa.ifa_rtrequest = nd6_p2p_rtrequest; + ia->ia_ifa.ifa_flags |= RTF_CLONING; + break; + } + + splx(s); + if (scrub) { + ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; + in6_ifscrub(ifp, ia); + ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; + } + /* xxx + * in_socktrim + */ + /* + * Add route for the network. + */ + ia->ia_ifa.ifa_metric = ifp->if_metric; + if (ifp->if_flags & IFF_LOOPBACK) { + ia->ia_ifa.ifa_dstaddr = ia->ia_ifa.ifa_addr; + flags |= RTF_HOST; + } else if (ifp->if_flags & IFF_POINTOPOINT) { + if (ia->ia_dstaddr.sin6_family != AF_INET6) + return(0); + flags |= RTF_HOST; + } + if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0) + ia->ia_flags |= IFA_ROUTE; + + /* Add ownaddr as loopback rtentry, if necessary(ex. on p2p link). */ + in6_ifaddloop(&(ia->ia_ifa)); + + return(error); +} + +/* + * Add an address to the list of IP6 multicast addresses for a + * given interface. + */ +struct in6_multi * +in6_addmulti(maddr6, ifp, errorp) + register struct in6_addr *maddr6; + register struct ifnet *ifp; + int *errorp; +{ + struct in6_multi *in6m; + struct sockaddr_in6 sin6; + struct ifmultiaddr *ifma; + int s = splnet(); + + *errorp = 0; + + /* + * Call generic routine to add membership or increment + * refcount. It wants addresses in the form of a sockaddr, + * so we build one here (being careful to zero the unused bytes). + */ + bzero(&sin6, sizeof sin6); + sin6.sin6_family = AF_INET6; + sin6.sin6_len = sizeof sin6; + sin6.sin6_addr = *maddr6; + *errorp = if_addmulti(ifp, (struct sockaddr *)&sin6, &ifma); + if (*errorp) { + splx(s); + return 0; + } + + /* + * If ifma->ifma_protospec is null, then if_addmulti() created + * a new record. Otherwise, we are done. + */ + if (ifma->ifma_protospec != 0) + return ifma->ifma_protospec; + + /* XXX - if_addmulti uses M_WAITOK. Can this really be called + at interrupt time? If so, need to fix if_addmulti. XXX */ + in6m = (struct in6_multi *)malloc(sizeof(*in6m), M_IPMADDR, M_NOWAIT); + if (in6m == NULL) { + splx(s); + return (NULL); + } + + bzero(in6m, sizeof *in6m); + in6m->in6m_addr = *maddr6; + in6m->in6m_ifp = ifp; + in6m->in6m_ifma = ifma; + ifma->ifma_protospec = in6m; + LIST_INSERT_HEAD(&in6_multihead, in6m, in6m_entry); + + /* + * Let MLD6 know that we have joined a new IP6 multicast + * group. + */ + mld6_start_listening(in6m); + splx(s); + return(in6m); +} + +/* + * Delete a multicast address record. + */ +void +in6_delmulti(in6m) + struct in6_multi *in6m; +{ + struct ifmultiaddr *ifma = in6m->in6m_ifma; + int s = splnet(); + + if (ifma->ifma_refcount == 1) { + /* + * No remaining claims to this record; let MLD6 know + * that we are leaving the multicast group. + */ + mld6_stop_listening(in6m); + ifma->ifma_protospec = 0; + LIST_REMOVE(in6m, in6m_entry); + free(in6m, M_IPMADDR); + } + /* XXX - should be separate API for when we have an ifma? */ + if_delmulti(ifma->ifma_ifp, ifma->ifma_addr); + splx(s); +} + +/* + * Find an IPv6 interface link-local address specific to an interface. + */ +struct in6_ifaddr * +in6ifa_ifpforlinklocal(ifp) + struct ifnet *ifp; +{ + register struct ifaddr *ifa; + + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr == NULL) + continue; /* just for safety */ + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) + break; + } + + return((struct in6_ifaddr *)ifa); +} + + +/* + * find the internet address corresponding to a given interface and address. + */ +struct in6_ifaddr * +in6ifa_ifpwithaddr(ifp, addr) + struct ifnet *ifp; + struct in6_addr *addr; +{ + register struct ifaddr *ifa; + + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr == NULL) + continue; /* just for safety */ + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (IN6_ARE_ADDR_EQUAL(addr, IFA_IN6(ifa))) + break; + } + + return((struct in6_ifaddr *)ifa); +} + +/* + * Convert IP6 address to printable (loggable) representation. + */ +static char digits[] = "0123456789abcdef"; +static int ip6round = 0; +char * +ip6_sprintf(addr) +register struct in6_addr *addr; +{ + static char ip6buf[8][48]; + register int i; + register char *cp; + register u_short *a = (u_short *)addr; + register u_char *d; + int dcolon = 0; + + ip6round = (ip6round + 1) & 7; + cp = ip6buf[ip6round]; + + for (i = 0; i < 8; i++) { + if (dcolon == 1) { + if (*a == 0) { + if (i == 7) + *cp++ = ':'; + a++; + continue; + } else + dcolon = 2; + } + if (*a == 0) { + if (dcolon == 0 && *(a + 1) == 0) { + if (i == 0) + *cp++ = ':'; + *cp++ = ':'; + dcolon = 1; + } else { + *cp++ = '0'; + *cp++ = ':'; + } + a++; + continue; + } + d = (u_char *)a; + *cp++ = digits[*d >> 4]; + *cp++ = digits[*d++ & 0xf]; + *cp++ = digits[*d >> 4]; + *cp++ = digits[*d & 0xf]; + *cp++ = ':'; + a++; + } + *--cp = 0; + return(ip6buf[ip6round]); +} + +int +in6_localaddr(in6) + struct in6_addr *in6; +{ + struct in6_ifaddr *ia; + + if (IN6_IS_ADDR_LOOPBACK(in6) || IN6_IS_ADDR_LINKLOCAL(in6)) + return 1; + + for (ia = in6_ifaddr; ia; ia = ia->ia_next) + if (IN6_ARE_MASKED_ADDR_EQUAL(in6, &ia->ia_addr.sin6_addr, + &ia->ia_prefixmask.sin6_addr)) + return 1; + + return (0); +} + +/* + * Get a scope of the address. Node-local, link-local, site-local or global. + */ +int +in6_addrscope (addr) +struct in6_addr *addr; +{ + int scope; + + if (addr->s6_addr8[0] == 0xfe) { + scope = addr->s6_addr8[1] & 0xc0; + + switch (scope) { + case 0x80: + return IPV6_ADDR_SCOPE_LINKLOCAL; + break; + case 0xc0: + return IPV6_ADDR_SCOPE_SITELOCAL; + break; + default: + return IPV6_ADDR_SCOPE_GLOBAL; /* just in case */ + break; + } + } + + + if (addr->s6_addr8[0] == 0xff) { + scope = addr->s6_addr8[1] & 0x0f; + + /* + * due to other scope such as reserved, + * return scope doesn't work. + */ + switch (scope) { + case IPV6_ADDR_SCOPE_NODELOCAL: + return IPV6_ADDR_SCOPE_NODELOCAL; + break; + case IPV6_ADDR_SCOPE_LINKLOCAL: + return IPV6_ADDR_SCOPE_LINKLOCAL; + break; + case IPV6_ADDR_SCOPE_SITELOCAL: + return IPV6_ADDR_SCOPE_SITELOCAL; + break; + default: + return IPV6_ADDR_SCOPE_GLOBAL; + break; + } + } + + if (bcmp(&in6addr_loopback, addr, sizeof(addr) - 1) == 0) { + if (addr->s6_addr8[15] == 1) /* loopback */ + return IPV6_ADDR_SCOPE_NODELOCAL; + if (addr->s6_addr8[15] == 0) /* unspecified */ + return IPV6_ADDR_SCOPE_LINKLOCAL; + } + + return IPV6_ADDR_SCOPE_GLOBAL; +} + +/* + * return length of part which dst and src are equal + * hard coding... + */ + +int +in6_matchlen(src, dst) +struct in6_addr *src, *dst; +{ + int match = 0; + u_char *s = (u_char *)src, *d = (u_char *)dst; + u_char *lim = s + 16, r; + + while (s < lim) + if ((r = (*d++ ^ *s++)) != 0) { + while (r < 128) { + match++; + r <<= 1; + } + break; + } else + match += 8; + return match; +} + +int +in6_are_prefix_equal(p1, p2, len) + struct in6_addr *p1, *p2; + int len; +{ + int bytelen, bitlen; + + /* sanity check */ + if (0 > len || len > 128) { + log(LOG_ERR, "in6_are_prefix_equal: invalid prefix length(%d)\n", + len); + return(0); + } + + bytelen = len / 8; + bitlen = len % 8; + + if (bcmp(&p1->s6_addr, &p2->s6_addr, bytelen)) + return(0); + if (p1->s6_addr[bytelen] >> (8 - bitlen) != + p2->s6_addr[bytelen] >> (8 - bitlen)) + return(0); + + return(1); +} + +void +in6_prefixlen2mask(maskp, len) + struct in6_addr *maskp; + int len; +{ + u_char maskarray[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; + int bytelen, bitlen, i; + + /* sanity check */ + if (0 > len || len > 128) { + log(LOG_ERR, "in6_prefixlen2mask: invalid prefix length(%d)\n", + len); + return; + } + + bzero(maskp, sizeof(*maskp)); + bytelen = len / 8; + bitlen = len % 8; + for (i = 0; i < bytelen; i++) + maskp->s6_addr[i] = 0xff; + if (bitlen) + maskp->s6_addr[bytelen] = maskarray[bitlen - 1]; +} + +/* + * return the best address out of the same scope + */ + +struct in6_ifaddr * +in6_ifawithscope(ifp, dst) + register struct ifnet *ifp; + register struct in6_addr *dst; +{ + int dst_scope = in6_addrscope(dst), blen = -1, tlen; + struct ifaddr *ifa; + struct in6_ifaddr *besta = NULL, *ia; + struct in6_ifaddr *dep[2]; /*last-resort: deprecated*/ + + dep[0] = dep[1] = NULL; + + /* + * We first look for addresses in the same scope. + * If there is one, return it. + * If two or more, return one which matches the dst longest. + * If none, return one of global addresses assigned other ifs. + */ + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) + continue; /* XXX: is there any case to allow anycast? */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) + continue; /* don't use this interface */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { + if (ip6_use_deprecated) + dep[0] = (struct in6_ifaddr *)ifa; + continue; + } + + if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { + /* + * call in6_matchlen() as few as possible + */ + if (besta) { + if (blen == -1) + blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); + tlen = in6_matchlen(IFA_IN6(ifa), dst); + if (tlen > blen) { + blen = tlen; + besta = (struct in6_ifaddr *)ifa; + } + } else + besta = (struct in6_ifaddr *)ifa; + } + } + if (besta) + return besta; + + for (ia = in6_ifaddr; ia; ia = ia->ia_next) { + if (IPV6_ADDR_SCOPE_GLOBAL != + in6_addrscope(&(ia->ia_addr.sin6_addr))) + continue; + /* XXX: is there any case to allow anycast? */ + if ((ia->ia6_flags & IN6_IFF_ANYCAST) != 0) + continue; + if ((ia->ia6_flags & IN6_IFF_NOTREADY) != 0) + continue; + if ((ia->ia6_flags & IN6_IFF_DETACHED) != 0) + continue; + if ((ia->ia6_flags & IN6_IFF_DEPRECATED) != 0) { + if (ip6_use_deprecated) + dep[1] = (struct in6_ifaddr *)ifa; + continue; + } + return ia; + } + + /* use the last-resort values, that are, deprecated addresses */ + if (dep[0]) + return dep[0]; + if (dep[1]) + return dep[1]; + + return NULL; +} + +/* + * return the best address out of the same scope. if no address was + * found, return the first valid address from designated IF. + */ + +struct in6_ifaddr * +in6_ifawithifp(ifp, dst) + register struct ifnet *ifp; + register struct in6_addr *dst; +{ + int dst_scope = in6_addrscope(dst), blen = -1, tlen; + struct ifaddr *ifa; + struct in6_ifaddr *besta = 0; + struct in6_ifaddr *dep[2]; /*last-resort: deprecated*/ + + dep[0] = dep[1] = NULL; + + /* + * We first look for addresses in the same scope. + * If there is one, return it. + * If two or more, return one which matches the dst longest. + * If none, return one of global addresses assigned other ifs. + */ + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) + continue; /* XXX: is there any case to allow anycast? */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) + continue; /* don't use this interface */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { + if (ip6_use_deprecated) + dep[0] = (struct in6_ifaddr *)ifa; + continue; + } + + if (dst_scope == in6_addrscope(IFA_IN6(ifa))) { + /* + * call in6_matchlen() as few as possible + */ + if (besta) { + if (blen == -1) + blen = in6_matchlen(&besta->ia_addr.sin6_addr, dst); + tlen = in6_matchlen(IFA_IN6(ifa), dst); + if (tlen > blen) { + blen = tlen; + besta = (struct in6_ifaddr *)ifa; + } + } else + besta = (struct in6_ifaddr *)ifa; + } + } + if (besta) + return(besta); + + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_ANYCAST) + continue; /* XXX: is there any case to allow anycast? */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_NOTREADY) + continue; /* don't use this interface */ + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DETACHED) + continue; + if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_DEPRECATED) { + if (ip6_use_deprecated) + dep[1] = (struct in6_ifaddr *)ifa; + continue; + } + + return (struct in6_ifaddr *)ifa; + } + + /* use the last-resort values, that are, deprecated addresses */ + if (dep[0]) + return dep[0]; + if (dep[1]) + return dep[1]; + + return NULL; +} + +/* + * perform DAD when interface becomes IFF_UP. + */ +void +in6_if_up(ifp) + struct ifnet *ifp; +{ + struct ifaddr *ifa; + struct in6_ifaddr *ia; + struct sockaddr_dl *sdl; + int type; + struct ether_addr ea; + int off; + int dad_delay; /* delay ticks before DAD output */ + + bzero(&ea, sizeof(ea)); + sdl = NULL; + + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family == AF_INET6 + && IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) { + goto dad; + } + if (ifa->ifa_addr->sa_family != AF_LINK) + continue; + sdl = (struct sockaddr_dl *)ifa->ifa_addr; + break; + } + + switch (ifp->if_type) { + case IFT_SLIP: + case IFT_PPP: +#ifdef IFT_DUMMY + case IFT_DUMMY: +#endif + case IFT_GIF: + case IFT_FAITH: + type = IN6_IFT_P2P; + in6_ifattach(ifp, type, 0, 1); + break; + case IFT_ETHER: + case IFT_FDDI: + case IFT_ATM: + type = IN6_IFT_802; + if (sdl == NULL) + break; + off = sdl->sdl_nlen; + if (bcmp(&sdl->sdl_data[off], &ea, sizeof(ea)) != 0) + in6_ifattach(ifp, type, LLADDR(sdl), 0); + break; + case IFT_ARCNET: + type = IN6_IFT_ARCNET; + if (sdl == NULL) + break; + off = sdl->sdl_nlen; + if (sdl->sdl_data[off] != 0) /* XXX ?: */ + in6_ifattach(ifp, type, LLADDR(sdl), 0); + break; + default: + break; + } + +dad: + dad_delay = 0; + for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next) + { + if (ifa->ifa_addr->sa_family != AF_INET6) + continue; + ia = (struct in6_ifaddr *)ifa; + if (ia->ia6_flags & IN6_IFF_TENTATIVE) + nd6_dad_start(ifa, &dad_delay); + } +} + +/* + * Calculate max IPv6 MTU through all the interfaces and store it + * to in6_maxmtu. + */ +void +in6_setmaxmtu() +{ + unsigned long maxmtu = 0; + struct ifnet *ifp; + + for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) + { + if ((ifp->if_flags & IFF_LOOPBACK) == 0 && + nd_ifinfo[ifp->if_index].linkmtu > maxmtu) + maxmtu = nd_ifinfo[ifp->if_index].linkmtu; + } + if (maxmtu) /* update only when maxmtu is positive */ + in6_maxmtu = maxmtu; +} + +/* + * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be + * v4 mapped addr or v4 compat addr + */ +void +in6_sin6_2_sin(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) +{ + bzero(sin, sizeof(*sin)); + sin->sin_len = sizeof(struct sockaddr_in); + sin->sin_family = AF_INET; + sin->sin_port = sin6->sin6_port; + sin->sin_addr.s_addr = sin6->sin6_addr.s6_addr32[3]; +} + +/* Convert sockaddr_in to sockaddr_in6 in v4 mapped addr format. */ +void +in6_sin_2_v4mapsin6(struct sockaddr_in *sin, struct sockaddr_in6 *sin6) +{ + bzero(sin6, sizeof(*sin6)); + sin6->sin6_len = sizeof(struct sockaddr_in6); + sin6->sin6_family = AF_INET6; + sin6->sin6_port = sin->sin_port; + sin6->sin6_addr.s6_addr32[0] = 0; + sin6->sin6_addr.s6_addr32[1] = 0; + sin6->sin6_addr.s6_addr32[2] = IPV6_ADDR_INT32_SMP; + sin6->sin6_addr.s6_addr32[3] = sin->sin_addr.s_addr; +} + +/* Convert sockaddr_in6 into sockaddr_in. */ +void +in6_sin6_2_sin_in_sock(struct sockaddr *nam) +{ + struct sockaddr_in *sin_p; + struct sockaddr_in6 sin6; + + /* + * Save original sockaddr_in6 addr and convert it + * to sockaddr_in. + */ + sin6 = *(struct sockaddr_in6 *)nam; + sin_p = (struct sockaddr_in *)nam; + in6_sin6_2_sin(sin_p, &sin6); +} + +/* Convert sockaddr_in into sockaddr_in6 in v4 mapped addr format. */ +void +in6_sin_2_v4mapsin6_in_sock(struct sockaddr **nam) +{ + struct sockaddr_in *sin_p; + struct sockaddr_in6 *sin6_p; + + MALLOC(sin6_p, struct sockaddr_in6 *, sizeof *sin6_p, M_SONAME, + M_WAITOK); + sin_p = (struct sockaddr_in *)*nam; + in6_sin_2_v4mapsin6(sin_p, sin6_p); + FREE(*nam, M_SONAME); + *nam = (struct sockaddr *)sin6_p; +} |
