-/* $KAME: in6.c,v 1.72 2000/03/30 03:45:26 itojun Exp $ */
+/* $FreeBSD: src/sys/netinet6/in6.c,v 1.7.2.7 2001/08/06 20:26:22 ume Exp $ */
+/* $KAME: in6.c,v 1.187 2001/05/24 07:43:59 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* @(#)in.c 8.2 (Berkeley) 11/15/93
*/
-#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
-#include "opt_inet.h"
-#endif
#include <sys/param.h>
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
#include <sys/ioctl.h>
-#endif
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
+#include <sys/kern_event.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>
-#if __NetBSD__
-#include <net/if_ether.h>
-#else
#include <netinet/if_ether.h>
+#ifndef SCOPEDROUTING
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <netinet/in_pcb.h>
#endif
#include <netinet6/nd6.h>
#include <netinet6/mld6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet6/in6_ifattach.h>
+#include <netinet6/scope6_var.h>
+#ifndef SCOPEDROUTING
+#include <netinet6/in6_pcb.h>
+#endif
#include <net/net_osdep.h>
-#if MIP6
-#include <netinet6/mip6.h>
-#include <netinet6/mip6_common.h>
-
-struct nd_prefix *(*mip6_get_home_prefix_hook) __P((void));
-#endif /* MIP6 */
-
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3
+#ifndef __APPLE__
MALLOC_DEFINE(M_IPMADDR, "in6_multi", "internet multicast address");
#endif
-
-/*
+ /*
* Definitions of some costant IP6 addresses.
*/
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const struct in6_addr in6mask96 = IN6MASK96;
const struct in6_addr in6mask128 = IN6MASK128;
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
+const struct sockaddr_in6 sa6_any = {sizeof(sa6_any), AF_INET6,
+ 0, 0, IN6ADDR_ANY_INIT, 0};
+
static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
struct ifnet *, struct proc *));
-#else
-static int in6_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
- struct ifnet *));
-#endif
+static int in6_ifinit __P((struct ifnet *, struct in6_ifaddr *,
+ struct sockaddr_in6 *, int));
+static void in6_unlink_ifa __P((struct in6_ifaddr *, struct ifnet *));
-#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
struct in6_multihead in6_multihead; /* XXX BSS initialization */
-#else
-/*
- * This structure is used to keep track of in6_multi chains which belong to
- * deleted interface addresses.
- */
-static LIST_HEAD(, multi6_kludge) in6_mk; /* XXX BSS initialization */
-
-struct multi6_kludge {
- LIST_ENTRY(multi6_kludge) mk_entry;
- struct ifnet *mk_ifp;
- struct in6_multihead mk_head;
-};
-#endif
-
-/*
- * 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().
static void
in6_ifloop_request(int cmd, struct ifaddr *ifa)
{
- struct sockaddr_in6 lo_sa;
struct sockaddr_in6 all1_sa;
struct rtentry *nrt = NULL;
+ int e;
- 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_family = AF_INET6;
+ all1_sa.sin6_len = sizeof(struct sockaddr_in6);
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);
+
+ /*
+ * We specify the address itself as the gateway, and set the
+ * RTF_LLINFO flag, so that the corresponding host route would have
+ * the flag, and thus applications that assume traditional behavior
+ * would be happy. Note that we assume the caller of the function
+ * (probably implicitly) set nd6_rtrequest() to ifa->ifa_rtrequest,
+ * which changes the outgoing interface to the loopback interface.
+ */
+ e = rtrequest(cmd, ifa->ifa_addr, ifa->ifa_addr,
+ (struct sockaddr *)&all1_sa,
+ RTF_UP|RTF_HOST|RTF_LLINFO, &nrt);
+ if (e != 0) {
+ log(LOG_ERR, "in6_ifloop_request: "
+ "%s operation failed for %s (errno=%d)\n",
+ cmd == RTM_ADD ? "ADD" : "DELETE",
+ ip6_sprintf(&((struct in6_ifaddr *)ifa)->ia_addr.sin6_addr),
+ e);
+ }
/*
* 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.
+ * We need this because when we refer to 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) {
- IFAFREE(nrt->rt_ifa);
- ifa->ifa_refcnt++;
- nrt->rt_ifa = ifa;
- nrt->rt_dlt = ifa->ifa_dlt;
+ rtsetifa(nrt, ifa);
+ }
+
+ /*
+ * Report the addition/removal of the address to the routing socket.
+ * XXX: since we called rtinit for a p2p interface with a destination,
+ * we end up reporting twice in such a case. Should we rather
+ * omit the second report?
+ */
+ if (nrt) {
+ rt_newaddrmsg(cmd, ifa, e, nrt);
+ if (cmd == RTM_DELETE) {
+ if (nrt->rt_refcnt <= 0) {
+ /* XXX: we should free the entry ourselves. */
+ rtref(nrt);
+ rtfree(nrt);
+ }
+ } else {
+ /* the cmd must be RTM_ADD here */
+ rtunref(nrt);
+ }
}
- 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().
+ * Add ownaddr as loopback rtentry. We previously add the route only if
+ * necessary (ex. on a p2p link). However, since we now manage addresses
+ * separately from prefixes, we should always add the route. We can't
+ * rely on the cloning mechanism from the corresponding interface route
+ * any more.
*/
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
-#if defined(__FreeBSD__) || defined (__APPLE__)
- , 0
-#endif /* __FreeBSD__ */
- );
- if (rt == 0 || (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0)
- in6_ifloop_request(RTM_ADD, ifa);
- if (rt)
- rt->rt_refcnt--;
- }
+ struct rtentry *rt;
+
+ /* If there is no loopback entry, allocate one. */
+ rt = rtalloc1(ifa->ifa_addr, 0, 0);
+ if (rt == NULL || (rt->rt_flags & RTF_HOST) == 0 ||
+ (rt->rt_ifp->if_flags & IFF_LOOPBACK) == 0)
+ in6_ifloop_request(RTM_ADD, ifa);
+ if (rt)
+ rt->rt_refcnt--;
}
/*
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;
- }
+ struct in6_ifaddr *ia;
+ struct rtentry *rt;
+ int ia_count = 0;
+
+ /*
+ * Some of BSD variants do not remove cloned routes
+ * from an interface direct route, when removing the direct route
+ * (see comments in net/net_osdep.h). Even for variants that do remove
+ * cloned routes, they could fail to remove the cloned routes when
+ * we handle multple addresses that share a common prefix.
+ * So, we should remove the route corresponding to the deleted address
+ * regardless of the result of in6_is_ifloop_auto().
+ */
+
+ /*
+ * Delete the entry only if exact one ifa exists. More than one ifa
+ * can exist if we assign a same single address to multiple
+ * (probably p2p) interfaces.
+ * XXX: we should avoid such a configuration in IPv6...
+ */
+ 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)
+ }
+
+ if (ia_count == 1) {
+ /*
+ * Before deleting, check if a corresponding loopbacked host
+ * route surely exists. With this check, we can avoid to
+ * delete an interface direct route whose destination is same
+ * as the address being removed. This can happen when remofing
+ * a subnet-router anycast address on an interface attahced
+ * to a shared medium.
+ */
+ rt = rtalloc1(ifa->ifa_addr, 0, 0);
+ if (rt != NULL && (rt->rt_flags & RTF_HOST) != 0 &&
+ (rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
+ rt->rt_refcnt--;
in6_ifloop_request(RTM_DELETE, ifa);
+ }
}
}
return -1;
ifp = ifindex2ifnet[idx];
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
}
int
-in6_mask2len(mask)
+in6_mask2len(mask, lim0)
struct in6_addr *mask;
+ u_char *lim0;
{
- int x, y;
-
- for (x = 0; x < sizeof(*mask); x++) {
- if (mask->s6_addr8[x] != 0xff)
+ int x = 0, y;
+ u_char *lim = lim0, *p;
+
+ if (lim0 == NULL ||
+ lim0 - (u_char *)mask > sizeof(*mask)) /* ignore the scope_id part */
+ lim = (u_char *)mask + sizeof(*mask);
+ for (p = (u_char *)mask; p < lim; x++, p++) {
+ if (*p != 0xff)
break;
}
y = 0;
- if (x < sizeof(*mask)) {
+ if (p < lim) {
for (y = 0; y < 8; y++) {
- if ((mask->s6_addr8[x] & (0x80 >> y)) == 0)
+ if ((*p & (0x80 >> y)) == 0)
break;
}
}
+
+ /*
+ * when the limit pointer is given, do a stricter check on the
+ * remaining bits.
+ */
+ if (p < lim) {
+ if (y != 0 && (*p & (0x00ff >> y)) != 0)
+ return(-1);
+ for (p = p + 1; p < lim; p++)
+ if (*p != 0)
+ return(-1);
+ }
+
return x * 8 + y;
}
#define ia62ifa(ia6) (&((ia6)->ia_ifa))
int
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
in6_control(so, cmd, data, ifp, p)
struct socket *so;
u_long cmd;
caddr_t data;
struct ifnet *ifp;
struct proc *p;
-#else
-in6_control(so, cmd, data, ifp)
- struct socket *so;
- u_long cmd;
- caddr_t data;
- struct ifnet *ifp;
-#endif
{
struct in6_ifreq *ifr = (struct in6_ifreq *)data;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- struct ifaddr *ifa;
-#endif
- struct in6_ifaddr *ia = NULL, *oia;
+ struct in6_ifaddr *ia = NULL;
struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
- struct sockaddr_in6 oldaddr;
-#ifdef COMPAT_IN6IFIOCTL
- struct sockaddr_in6 net;
-#endif
- int error = 0, hostIsNew, prefixIsNew;
- int newifaddr;
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined(__APPLE__)
- time_t time_second = (time_t)time.tv_sec;
-#endif
- int privileged;
+ int privileged, error = 0;
u_long dl_tag;
privileged = 0;
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
- if (p && !suser(p->p_ucred, &p->p_acflag))
- privileged++;
+#ifdef __APPLE__
+ if (p == NULL || !suser(p->p_ucred, &p->p_acflag))
#else
- if ((so->so_state & SS_PRIV) != 0)
- privileged++;
+ if (p == NULL || !suser(p))
#endif
+ 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
switch (cmd) {
case SIOCGETSGCNT_IN6:
case SIOCGETMIFCNT_IN6:
return (mrt6_ioctl(cmd, data));
}
-#if MIP6
- /* These require root privileges */
- switch (cmd) {
- case SIOCSDEBUG_MIP6:
- case SIOCSBCFLUSH_MIP6:
- case SIOCSDEFCONFIG_MIP6:
- case SIOCSBRUPDATE_MIP6:
- case SIOCSENABLEBR_MIP6:
- case SIOCSATTACH_MIP6:
- case SIOCSRELEASE_MIP6:
-
- case SIOCSHALISTFLUSH_MIP6:
- case SIOCSHAPREF_MIP6:
- case SIOCSFWDSLUNICAST_MIP6:
- case SIOCSFWDSLMULTICAST_MIP6:
-
- case SIOCSFORADDRFLUSH_MIP6:
- case SIOCSHADDRFLUSH_MIP6:
- case SIOCSBULISTFLUSH_MIP6:
- case SIOCACOADDR_MIP6:
- case SIOCAHOMEADDR_MIP6:
- case SIOCSBULIFETIME_MIP6:
- case SIOCSHRLIFETIME_MIP6:
- case SIOCDCOADDR_MIP6:
- case SIOCSPROMMODE_MIP6:
- case SIOCSBU2CN_MIP6:
- case SIOCSREVTUNNEL_MIP6:
- case SIOCSAUTOCONFIG_MIP6:
- case SIOCSEAGERMD_MIP6:
- if (!privileged)
- return(EPERM);
- /* Anyone can use these or the user is root */
- /* case SIOCXVERYSAFECOMMAND_MIP6: */
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined(__APPLE__)
- return mip6_ioctl(so, cmd, data, ifp, p);
-#else
- return mip6_ioctl(so, cmd, data, ifp);
-#endif
- }
-#endif /* MIP6 */
if (ifp == NULL)
return(EOPNOTSUPP);
case SIOCSIFINFO_FLAGS:
if (!privileged)
return(EPERM);
- /*fall through*/
+ /* fall through */
+ case OSIOCGIFINFO_IN6:
case SIOCGIFINFO_IN6:
case SIOCGDRLST_IN6:
case SIOCGPRLST_IN6:
case SIOCAIFPREFIX_IN6:
case SIOCCIFPREFIX_IN6:
case SIOCSGIFPREFIX_IN6:
- if (!privileged)
- return(EPERM);
- /*fall through*/
case SIOCGIFPREFIX_IN6:
- if (ip6_forwarding == 0)
+ log(LOG_NOTICE,
+ "prefix ioctls are now invalidated. "
+ "please use ifconfig.\n");
+ return(EOPNOTSUPP);
+ }
+
+ switch (cmd) {
+ case SIOCSSCOPE6:
+ if (!privileged)
return(EPERM);
- return(in6_prefix_ioctl(so, cmd, data, ifp));
+ return(scope6_set(ifp, ifr->ifr_ifru.ifru_scope_id));
+ break;
+ case SIOCGSCOPE6:
+ return(scope6_get(ifp, ifr->ifr_ifru.ifru_scope_id));
+ break;
+ case SIOCGSCOPE6DEF:
+ return(scope6_get_default(ifr->ifr_ifru.ifru_scope_id));
+ break;
}
switch (cmd) {
case SIOCDLIFADDR:
if (!privileged)
return(EPERM);
- /*fall through*/
+ /* fall through */
case SIOCGLIFADDR:
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
return in6_lifaddr_ioctl(so, cmd, data, ifp, p);
-#else
- return in6_lifaddr_ioctl(so, cmd, data, ifp);
-#endif
}
+
+#ifdef __APPLE__
+
+ switch (cmd) {
+
+ case SIOCAUTOCONF_START:
+ ifp->if_eflags |= IFEF_ACCEPT_RTADVD;
+ return (0);
+
+ case SIOCAUTOCONF_STOP:
+ {
+ struct ifaddr *ifa, *nifa = NULL;
+
+ ifp->if_eflags &= ~IFEF_ACCEPT_RTADVD;
+
+ /* nuke prefix list. this may try to remove some of ifaddrs as well */
+ in6_purgeprefix(ifp);
+
+ /* removed autoconfigured address from interface */
+
+ for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; ifa = nifa)
+ {
+ nifa = TAILQ_NEXT(ifa, ifa_list);
+ if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ if (((struct in6_ifaddr *)ifa)->ia6_flags & IN6_IFF_AUTOCONF)
+ in6_purgeaddr(ifa);
+ }
+ return (0);
+ }
+
+
+ case SIOCLL_START:
+
+ /* NOTE: All the interface specific DLIL attachements should be done here
+ * They are currently done in in6_ifattach() for the interfaces that need it
+ */
+
+ if (ifp->if_type == IFT_PPP && ifra->ifra_addr.sin6_family == AF_INET6 &&
+ ifra->ifra_dstaddr.sin6_family == AF_INET6)
+ in6_if_up(ifp, ifra); /* PPP may provide LinkLocal addresses */
+ else
+ in6_if_up(ifp, 0);
+
+ return(0);
+
+ case SIOCLL_STOP:
+ {
+ struct ifaddr *ifa, *nifa = NULL;
+ /* removed link local addresses from interface */
+
+ for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; ifa = nifa)
+ {
+ nifa = TAILQ_NEXT(ifa, ifa_list);
+ if (ifa->ifa_addr == NULL || ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa)))
+ in6_purgeaddr(ifa);
+ }
+ return (0);
+ }
+
+
+ case SIOCPROTOATTACH_IN6:
+
+ switch (ifp->if_type) {
+#if IFT_BRIDGE /*OpenBSD 2.8*/
+ /* some of the interfaces are inherently not IPv6 capable */
+ case IFT_BRIDGE:
+ return;
+#endif
+ default:
+
+ if (error = dlil_plumb_protocol(PF_INET6, ifp, &dl_tag))
+ printf("SIOCPROTOATTACH_IN6: %s error=%d\n",
+ if_name(ifp), error);
+ break;
+
+ }
+ return (error);
+
+
+ case SIOCPROTODETACH_IN6:
+
+ in6_purgeif(ifp); /* Cleanup interface routes and addresses */
+
+ if (error = dlil_unplumb_protocol(PF_INET6, ifp))
+ printf("SIOCPROTODETACH_IN6: %s error=%d\n",
+ if_name(ifp), error);
+ return(error);
+
+ }
+#endif
/*
* Find address for this interface, if it exists.
*/
if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr)) {
if (sa6->sin6_addr.s6_addr16[1] == 0) {
- /* interface ID is not embedded by the user */
+ /* link 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 */
+ return(EINVAL); /* link ID contradicts */
}
if (sa6->sin6_scope_id) {
if (sa6->sin6_scope_id !=
}
switch (cmd) {
+ case SIOCSIFADDR_IN6:
+ case SIOCSIFDSTADDR_IN6:
+ case SIOCSIFNETMASK_IN6:
+ /*
+ * Since IPv6 allows a node to assign multiple addresses
+ * on a single interface, SIOCSIFxxx ioctls are not suitable
+ * and should be unused.
+ */
+ /* we decided to obsolete this command (20000704) */
+ return(EINVAL);
case SIOCDIFADDR_IN6:
/*
- * for IPv4, we look for existing in6_ifaddr here to allow
+ * for IPv4, we look for existing in_ifaddr here to allow
* "ifconfig if0 delete" to remove first IPv4 address on the
* interface. For IPv6, as the spec allow multiple interface
* address from the day one, we consider "remove the first one"
- * semantics to be not preferrable.
+ * semantics to be not preferable.
*/
if (ia == NULL)
return(EADDRNOTAVAIL);
/* FALLTHROUGH */
case SIOCAIFADDR_IN6:
- case SIOCSIFADDR_IN6:
-#if COMPAT_IN6IFIOCTL
- case SIOCSIFDSTADDR_IN6:
- case SIOCSIFNETMASK_IN6:
/*
- * Since IPv6 allows a node to assign multiple addresses
- * on a single interface, SIOCSIFxxx ioctls are not suitable
- * and should be unused.
+ * We always require users to specify a valid IPv6 address for
+ * the corresponding operation.
*/
-#endif
- if (ifra->ifra_addr.sin6_family != AF_INET6)
+ if (ifra->ifra_addr.sin6_family != AF_INET6 ||
+ ifra->ifra_addr.sin6_len != sizeof(struct sockaddr_in6))
return(EAFNOSUPPORT);
if (!privileged)
return(EPERM);
- if (ia == NULL) {
- ia = (struct in6_ifaddr *)
- _MALLOC(sizeof(*ia), M_IFADDR, M_WAITOK);
- if (ia == NULL)
- return (ENOBUFS);
- bzero((caddr_t)ia, sizeof(*ia));
- /* Initialize the address and masks */
- ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
- ia->ia_addr.sin6_family = AF_INET6;
- ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
- if (ifp->if_flags & IFF_POINTOPOINT) {
- ia->ia_ifa.ifa_dstaddr
- = (struct sockaddr *)&ia->ia_dstaddr;
- ia->ia_dstaddr.sin6_family = AF_INET6;
- ia->ia_dstaddr.sin6_len = sizeof(ia->ia_dstaddr);
- } else {
- ia->ia_ifa.ifa_dstaddr = NULL;
- bzero(&ia->ia_dstaddr, sizeof(ia->ia_dstaddr));
- }
- ia->ia_ifa.ifa_netmask
- = (struct sockaddr *)&ia->ia_prefixmask;
-
- ia->ia_ifp = ifp;
-
- printf("in6_control: Attach dl_tag for if=%s%n\n", ifp->if_name, ifp->if_unit);
-
- if (strcmp(ifp->if_name, "en") == 0)
- dl_tag = ether_attach_inet6(ifp);
-
- if (strcmp(ifp->if_name, "lo") == 0)
- dl_tag = lo_attach_inet(ifp);
-#if NGIF > 0
- if (strcmp(ifp->if_name, "gif") == 0)
- dl_tag = gif_attach_inet(ifp);
-#endif
-/* End of temp code */
- ia->ia_ifa.ifa_dlt = dl_tag;
-
-
- if ((oia = in6_ifaddr) != NULL) {
- for ( ; oia->ia_next; oia = oia->ia_next)
- continue;
- oia->ia_next = ia;
- } else
- in6_ifaddr = ia;
- ia->ia_ifa.ifa_refcnt++;
-
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- if ((ifa = ifp->if_addrlist) != NULL) {
- for ( ; ifa->ifa_next; ifa = ifa->ifa_next)
- continue;
- ifa->ifa_next = ia62ifa(ia);
- } else
- ifp->if_addrlist = ia62ifa(ia);
-#else
- TAILQ_INSERT_TAIL(&ifp->if_addrlist, &ia->ia_ifa,
- ifa_list);
-#endif
- ia->ia_ifa.ifa_refcnt++;
- newifaddr = 1;
- } else
- newifaddr = 0;
-
- 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:
case SIOCGIFDSTADDR_IN6:
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
return(EINVAL);
+ /*
+ * XXX: should we check if ifa_dstaddr is NULL and return
+ * an error?
+ */
ifr->ifr_dstaddr = ia->ia_dstaddr;
break;
ifr->ifr_ifru.ifru_icmp6stat =
*icmp6_ifstat[ifp->if_index];
break;
-#if COMPAT_IN6IFIOCTL /* should be unused */
- 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 */
- }
- }
-#ifdef __APPLE__
- error = dlil_ioctl(0, ifp, SIOCSIFDSTADDR, (caddr_t)ia);
- if (error == EOPNOTSUPP)
- error = 0;
- if (error) {
- ia->ia_dstaddr = oldaddr;
- return(error);
- }
-#else
- if (ifp->if_ioctl && (error = (ifp->if_ioctl)
- (ifp, SIOCSIFDSTADDR, (caddr_t)ia))) {
-#endif
- 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;
-#endif
case SIOCGIFALIFETIME_IN6:
ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
break;
ia->ia6_lifetime.ia6t_preferred = 0;
break;
- case SIOCSIFADDR_IN6:
- error = in6_ifinit(ifp, ia, &ifr->ifr_addr, 1);
-#if 0
- /*
- * the code chokes if we are to assign multiple addresses with
- * the same address prefix (rtinit() will return EEXIST, which
- * is not fatal actually). we will get memory leak if we
- * don't do it.
- * -> we may want to hide EEXIST from rtinit().
- */
- undo:
- if (error && newifaddr) {
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- if ((ifa = ifp->if_addrlist) == ia62ifa(ia))
- ifp->if_addrlist = ifa->ifa_next;
- else {
- while (ifa->ifa_next &&
- (ifa->ifa_next != ia62ifa(ia)))
- ifa = ifa->ifa_next;
- if (ifa->ifa_next)
- ifa->ifa_next = ia62ifa(ia)->ifa_next;
- else {
- printf("Couldn't unlink in6_ifaddr "
- "from ifp\n");
- }
- }
-#else
- TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list);
-#endif
- IFAFREE(&ia->ia_ifa);
-
- 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");
- }
+ case SIOCAIFADDR_IN6:
+ {
+ int i, error = 0;
+ struct nd_prefix pr0, *pr;
+
+ if (dlil_find_dltag(ifp->if_family, ifp->if_unit, PF_INET6, &dl_tag) == EPROTONOSUPPORT) {
+ /* Address is added without previous IPv6 configurator support (gif, stf etc...) */
+ if (error = dlil_plumb_protocol(PF_INET6, ifp, &dl_tag)) {
+ printf("SIOCAIFADDR_IN6: %s can't plumb protocol error=%d\n",
+ if_name(ifp), error);
+ return (error);
}
- IFAFREE(&ia->ia_ifa);
+ in6_if_up(ifp, NULL);
}
-#endif
- return error;
-
-#if COMPAT_IN6IFIOCTL /* XXX should be unused */
- 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;
-#endif
+
- case SIOCAIFADDR_IN6:
- prefixIsNew = 0;
- hostIsNew = 1;
+ /*
+ * first, make or update the interface address structure,
+ * and link it to the list.
+ */
+ if ((error = in6_update_ifa(ifp, ifra, ia)) != 0)
+ return(error);
- 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;
+ /*
+ * then, make the prefix on-link on the interface.
+ * XXX: we'd rather create the prefix before the address, but
+ * we need at least one address to install the corresponding
+ * interface route, so we configure the address first.
+ */
- /* Validate address families: */
/*
- * The destination address for a p2p link must have a family
- * of AF_UNSPEC or AF_INET6.
+ * convert mask to prefix length (prefixmask has already
+ * been validated in in6_update_ifa().
*/
- if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
- ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
- ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
- return(EAFNOSUPPORT);
+ bzero(&pr0, sizeof(pr0));
+ pr0.ndpr_ifp = ifp;
+ pr0.ndpr_plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
+ NULL);
+ if (pr0.ndpr_plen == 128)
+ break; /* we don't need to install a host route. */
+ pr0.ndpr_prefix = ifra->ifra_addr;
+ pr0.ndpr_mask = ifra->ifra_prefixmask.sin6_addr;
+ /* apply the mask for safety. */
+ for (i = 0; i < 4; i++) {
+ pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
+ ifra->ifra_prefixmask.sin6_addr.s6_addr32[i];
+ }
/*
- * The prefixmask must have a family of AF_UNSPEC or AF_INET6.
+ * XXX: since we don't have an API to set prefix (not address)
+ * lifetimes, we just use the same lifetimes as addresses.
+ * The (temporarily) installed lifetimes can be overridden by
+ * later advertised RAs (when accept_rtadv is non 0), which is
+ * an intended behavior.
*/
- if (ifra->ifra_prefixmask.sin6_family != AF_INET6 &&
- ifra->ifra_prefixmask.sin6_family != AF_UNSPEC)
- return(EAFNOSUPPORT);
-
- if (ifra->ifra_prefixmask.sin6_len) {
- in6_ifscrub(ifp, ia);
- ia->ia_prefixmask = ifra->ifra_prefixmask;
- prefixIsNew = 1;
+ pr0.ndpr_raf_onlink = 1; /* should be configurable? */
+ pr0.ndpr_raf_auto =
+ ((ifra->ifra_flags & IN6_IFF_AUTOCONF) != 0);
+ pr0.ndpr_vltime = ifra->ifra_lifetime.ia6t_vltime;
+ pr0.ndpr_pltime = ifra->ifra_lifetime.ia6t_pltime;
+
+ /* add the prefix if there's one. */
+ if ((pr = nd6_prefix_lookup(&pr0)) == NULL) {
+ /*
+ * nd6_prelist_add will install the corresponding
+ * interface route.
+ */
+ if ((error = nd6_prelist_add(&pr0, NULL, &pr)) != 0)
+ return(error);
+ if (pr == NULL) {
+ log(LOG_ERR, "nd6_prelist_add succedded but "
+ "no prefix\n");
+ return(EINVAL); /* XXX panic here? */
+ }
}
- if ((ifp->if_flags & IFF_POINTOPOINT) &&
- (ifra->ifra_dstaddr.sin6_family == AF_INET6)) {
- in6_ifscrub(ifp, ia);
- oldaddr = ia->ia_dstaddr;
- 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 */
+ if ((ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr))
+ == NULL) {
+ /* XXX: this should not happen! */
+ log(LOG_ERR, "in6_control: addition succeeded, but"
+ " no ifaddr\n");
+ } else {
+ if ((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 &&
+ ia->ia6_ndpr == NULL) { /* new autoconfed addr */
+ ia->ia6_ndpr = pr;
+ pr->ndpr_refcnt++;
+
+ /*
+ * If this is the first autoconf address from
+ * the prefix, create a temporary address
+ * as well (when specified).
+ */
+ if (ip6_use_tempaddr &&
+ pr->ndpr_refcnt == 1) {
+ int e;
+ if ((e = in6_tmpifadd(ia, 1)) != 0) {
+ log(LOG_NOTICE, "in6_control: "
+ "failed to create a "
+ "temporary address, "
+ "errno=%d\n",
+ e);
+ }
}
}
- prefixIsNew = 1; /* We lie; but effect's the same */
- }
- if (hostIsNew || prefixIsNew) {
- error = in6_ifinit(ifp, ia, &ifra->ifra_addr, 0);
-#if 0
- if (error)
- goto undo;
-#endif
- }
- if (hostIsNew && (ifp->if_flags & IFF_MULTICAST)) {
- int error_local = 0;
/*
- * join solicited multicast addr for new host id
+ * this might affect the status of autoconfigured
+ * addresses, that is, this address might make
+ * other addresses detached.
*/
- 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;
+ pfxlist_onlink_check();
+ in6_post_msg(ifp, KEV_INET6_NEW_USER_ADDR, ia);
}
- ia->ia6_flags = ifra->ifra_flags;
- ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
- ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
+ break;
+ }
- 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;
+ case SIOCDIFADDR_IN6:
+ {
+ int i = 0;
+ struct nd_prefix pr0, *pr;
/*
- * Perform DAD, if needed.
- * XXX It may be of use, if we can administratively
- * disable DAD.
+ * If the address being deleted is the only one that owns
+ * the corresponding prefix, expire the prefix as well.
+ * XXX: theoretically, we don't have to warry about such
+ * relationship, since we separate the address management
+ * and the prefix management. We do this, however, to provide
+ * as much backward compatibility as possible in terms of
+ * the ioctl operation.
*/
- switch (ifp->if_type) {
- case IFT_ARCNET:
- case IFT_ETHER:
- case IFT_FDDI:
-#if 0
- case IFT_ATM:
- case IFT_SLIP:
- case IFT_PPP:
-#endif
- /* Mobile IPv6 modification */
- if ((ifra->ifra_flags & IN6_IFF_NODAD) == 0) {
- ia->ia6_flags |= IN6_IFF_TENTATIVE;
- nd6_dad_start((struct ifaddr *)ia, NULL);
- }
- break;
- case IFT_DUMMY:
- case IFT_FAITH:
- case IFT_GIF:
- case IFT_LOOP:
- default:
- break;
+ bzero(&pr0, sizeof(pr0));
+ pr0.ndpr_ifp = ifp;
+ pr0.ndpr_plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr,
+ NULL);
+ if (pr0.ndpr_plen == 128)
+ goto purgeaddr;
+ pr0.ndpr_prefix = ia->ia_addr;
+ pr0.ndpr_mask = ia->ia_prefixmask.sin6_addr;
+ for (i = 0; i < 4; i++) {
+ pr0.ndpr_prefix.sin6_addr.s6_addr32[i] &=
+ ia->ia_prefixmask.sin6_addr.s6_addr32[i];
}
-
- 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;
+ /*
+ * The logic of the following condition is a bit complicated.
+ * We expire the prefix when
+ * 1. the address obeys autoconfiguration and it is the
+ * only owner of the associated prefix, or
+ * 2. the address does not obey autoconf and there is no
+ * other owner of the prefix.
+ */
+ if ((pr = nd6_prefix_lookup(&pr0)) != NULL &&
+ (((ia->ia6_flags & IN6_IFF_AUTOCONF) != 0 &&
+ pr->ndpr_refcnt == 1) ||
+ ((ia->ia6_flags & IN6_IFF_AUTOCONF) == 0 &&
+ pr->ndpr_refcnt == 0))) {
+ pr->ndpr_expire = 1; /* XXX: just for expiration */
}
- return(error);
-
- case SIOCDIFADDR_IN6:
- in6_purgeaddr(&ia->ia_ifa, ifp);
+ purgeaddr:
+ in6_purgeaddr(&ia->ia_ifa);
break;
+ }
default:
#ifdef __APPLE__
- error = dlil_ioctl(0, ifp, cmd, (caddr_t)data);
- if (error == EOPNOTSUPP)
- error = 0;
+ error = dlil_ioctl(PF_INET6, ifp, cmd, (caddr_t)data);
return error;
#else
return((*ifp->if_ioctl)(ifp, cmd, data));
#endif
}
+
return(0);
}
+/*
+ * Update parameters of an IPv6 interface address.
+ * If necessary, a new entry is created and linked into address chains.
+ * This function is separated from in6_control().
+ * XXX: should this be performed under splnet()?
+ */
+int
+in6_update_ifa(ifp, ifra, ia)
+ struct ifnet *ifp;
+ struct in6_aliasreq *ifra;
+ struct in6_ifaddr *ia;
+{
+ int error = 0, hostIsNew = 0, plen = -1;
+ struct in6_ifaddr *oia;
+ struct sockaddr_in6 dst6;
+ struct in6_addrlifetime *lt;
+
+ /* Validate parameters */
+ if (ifp == NULL || ifra == NULL) /* this maybe redundant */
+ return(EINVAL);
+
+ /*
+ * The destination address for a p2p link must have a family
+ * of AF_UNSPEC or AF_INET6.
+ */
+ if ((ifp->if_flags & IFF_POINTOPOINT) != 0 &&
+ ifra->ifra_dstaddr.sin6_family != AF_INET6 &&
+ ifra->ifra_dstaddr.sin6_family != AF_UNSPEC)
+ return(EAFNOSUPPORT);
+ /*
+ * validate ifra_prefixmask. don't check sin6_family, netmask
+ * does not carry fields other than sin6_len.
+ */
+ if (ifra->ifra_prefixmask.sin6_len > sizeof(struct sockaddr_in6))
+ return(EINVAL);
+ /*
+ * Because the IPv6 address architecture is classless, we require
+ * users to specify a (non 0) prefix length (mask) for a new address.
+ * We also require the prefix (when specified) mask is valid, and thus
+ * reject a non-consecutive mask.
+ */
+ if (ia == NULL && ifra->ifra_prefixmask.sin6_len == 0)
+ return(EINVAL);
+ if (ifra->ifra_prefixmask.sin6_len != 0) {
+ plen = in6_mask2len(&ifra->ifra_prefixmask.sin6_addr,
+ (u_char *)&ifra->ifra_prefixmask +
+ ifra->ifra_prefixmask.sin6_len);
+ if (plen <= 0)
+ return(EINVAL);
+ }
+ else {
+ /*
+ * In this case, ia must not be NULL. We just use its prefix
+ * length.
+ */
+ plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL);
+ }
+ /*
+ * If the destination address on a p2p interface is specified,
+ * and the address is a scoped one, validate/set the scope
+ * zone identifier.
+ */
+ dst6 = ifra->ifra_dstaddr;
+ if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) &&
+ (dst6.sin6_family == AF_INET6)) {
+ int scopeid;
+
+#ifndef SCOPEDROUTING
+ if ((error = in6_recoverscope(&dst6,
+ &ifra->ifra_dstaddr.sin6_addr,
+ ifp)) != 0)
+ return(error);
+#endif
+ scopeid = in6_addr2scopeid(ifp, &dst6.sin6_addr);
+ if (dst6.sin6_scope_id == 0) /* user omit to specify the ID. */
+ dst6.sin6_scope_id = scopeid;
+ else if (dst6.sin6_scope_id != scopeid)
+ return(EINVAL); /* scope ID mismatch. */
+#ifndef SCOPEDROUTING
+ if ((error = in6_embedscope(&dst6.sin6_addr, &dst6, NULL, NULL))
+ != 0)
+ return(error);
+ dst6.sin6_scope_id = 0; /* XXX */
+#endif
+ }
+ /*
+ * The destination address can be specified only for a p2p or a
+ * loopback interface. If specified, the corresponding prefix length
+ * must be 128.
+ */
+ if (ifra->ifra_dstaddr.sin6_family == AF_INET6) {
+ if ((ifp->if_flags & (IFF_POINTOPOINT|IFF_LOOPBACK)) == 0) {
+ /* XXX: noisy message */
+ log(LOG_INFO, "in6_update_ifa: a destination can be "
+ "specified for a p2p or a loopback IF only\n");
+ return(EINVAL);
+ }
+ if (plen != 128) {
+ /*
+ * The following message seems noisy, but we dare to
+ * add it for diagnosis.
+ */
+ log(LOG_INFO, "in6_update_ifa: prefixlen must be 128 "
+ "when dstaddr is specified\n");
+ return(EINVAL);
+ }
+ }
+ /* lifetime consistency check */
+ lt = &ifra->ifra_lifetime;
+ if (lt->ia6t_vltime != ND6_INFINITE_LIFETIME
+ && lt->ia6t_vltime + time_second < time_second) {
+ return EINVAL;
+ }
+ if (lt->ia6t_vltime == 0) {
+ /*
+ * the following log might be noisy, but this is a typical
+ * configuration mistake or a tool's bug.
+ */
+ log(LOG_INFO,
+ "in6_update_ifa: valid lifetime is 0 for %s\n",
+ ip6_sprintf(&ifra->ifra_addr.sin6_addr));
+ }
+ if (lt->ia6t_pltime != ND6_INFINITE_LIFETIME
+ && lt->ia6t_pltime + time_second < time_second) {
+ return EINVAL;
+ }
+
+ /*
+ * If this is a new address, allocate a new ifaddr and link it
+ * into chains.
+ */
+ if (ia == NULL) {
+ hostIsNew = 1;
+ /*
+ * When in6_update_ifa() is called in a process of a received
+ * RA, it is called under splnet(). So, we should call malloc
+ * with M_NOWAIT.
+ */
+ ia = (struct in6_ifaddr *)
+ _MALLOC(sizeof(*ia), M_IFADDR, M_NOWAIT);
+ if (ia == NULL)
+ return (ENOBUFS);
+ bzero((caddr_t)ia, sizeof(*ia));
+ /* Initialize the address and masks */
+ ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr;
+ ia->ia_addr.sin6_family = AF_INET6;
+ ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
+ if ((ifp->if_flags & (IFF_POINTOPOINT | IFF_LOOPBACK)) != 0) {
+ /*
+ * XXX: some functions expect that ifa_dstaddr is not
+ * NULL for p2p interfaces.
+ */
+ ia->ia_ifa.ifa_dstaddr
+ = (struct sockaddr *)&ia->ia_dstaddr;
+ } else {
+ ia->ia_ifa.ifa_dstaddr = NULL;
+ }
+ 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, &ia->ia_ifa,
+ ifa_list);
+ }
+
+ /* set prefix mask */
+ if (ifra->ifra_prefixmask.sin6_len) {
+ /*
+ * We prohibit changing the prefix length of an existing
+ * address, because
+ * + such an operation should be rare in IPv6, and
+ * + the operation would confuse prefix management.
+ */
+ if (ia->ia_prefixmask.sin6_len &&
+ in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL) != plen) {
+ log(LOG_INFO, "in6_update_ifa: the prefix length of an"
+ " existing (%s) address should not be changed\n",
+ ip6_sprintf(&ia->ia_addr.sin6_addr));
+ error = EINVAL;
+ goto unlink;
+ }
+ ia->ia_prefixmask = ifra->ifra_prefixmask;
+ }
+
+ /*
+ * If a new destination address is specified, scrub the old one and
+ * install the new destination. Note that the interface must be
+ * p2p or loopback (see the check above.)
+ */
+ if (dst6.sin6_family == AF_INET6 &&
+ !IN6_ARE_ADDR_EQUAL(&dst6.sin6_addr,
+ &ia->ia_dstaddr.sin6_addr)) {
+ int e;
+
+ if ((ia->ia_flags & IFA_ROUTE) != 0 &&
+ (e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
+ != 0) {
+ log(LOG_ERR, "in6_update_ifa: failed to remove "
+ "a route to the old destination: %s\n",
+ ip6_sprintf(&ia->ia_addr.sin6_addr));
+ /* proceed anyway... */
+ }
+ else
+ ia->ia_flags &= ~IFA_ROUTE;
+ ia->ia_dstaddr = dst6;
+ }
+
+ /* reset the interface and routing table appropriately. */
+ if ((error = in6_ifinit(ifp, ia, &ifra->ifra_addr, hostIsNew)) != 0)
+ goto unlink;
+
+ /*
+ * Beyond this point, we should call in6_purgeaddr upon an error,
+ * not just go to unlink.
+ */
+
+#if 0 /* disable this mechanism for now */
+ /* update prefix list */
+ if (hostIsNew &&
+ (ifra->ifra_flags & IN6_IFF_NOPFX) == 0) { /* XXX */
+ int iilen;
+
+ iilen = (sizeof(ia->ia_prefixmask.sin6_addr) << 3) - plen;
+ if ((error = in6_prefix_add_ifid(iilen, ia)) != 0) {
+ in6_purgeaddr((struct ifaddr *)ia);
+ return(error);
+ }
+ }
+#endif
+
+ if ((ifp->if_flags & IFF_MULTICAST) != 0) {
+ struct sockaddr_in6 mltaddr, mltmask;
+ struct in6_multi *in6m;
+
+ if (hostIsNew) {
+ /*
+ * 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);
+ if (error != 0) {
+ log(LOG_WARNING,
+ "in6_update_ifa: addmulti failed for "
+ "%s on %s (errno=%d)\n",
+ ip6_sprintf(&llsol), if_name(ifp),
+ error);
+ in6_purgeaddr((struct ifaddr *)ia);
+ return(error);
+ }
+ }
+
+ bzero(&mltmask, sizeof(mltmask));
+ mltmask.sin6_len = sizeof(struct sockaddr_in6);
+ mltmask.sin6_family = AF_INET6;
+ mltmask.sin6_addr = in6mask32;
+
+ /*
+ * join link-local all-nodes address
+ */
+ bzero(&mltaddr, sizeof(mltaddr));
+ mltaddr.sin6_len = sizeof(struct sockaddr_in6);
+ mltaddr.sin6_family = AF_INET6;
+ mltaddr.sin6_addr = in6addr_linklocal_allnodes;
+ mltaddr.sin6_addr.s6_addr16[1] = htons(ifp->if_index);
+
+ IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
+ if (in6m == NULL) {
+ rtrequest(RTM_ADD,
+ (struct sockaddr *)&mltaddr,
+ (struct sockaddr *)&ia->ia_addr,
+ (struct sockaddr *)&mltmask,
+ RTF_UP|RTF_CLONING, /* xxx */
+ (struct rtentry **)0);
+ (void)in6_addmulti(&mltaddr.sin6_addr, ifp, &error);
+ if (error != 0) {
+ log(LOG_WARNING,
+ "in6_update_ifa: addmulti failed for "
+ "%s on %s (errno=%d)\n",
+ ip6_sprintf(&mltaddr.sin6_addr),
+ if_name(ifp), error);
+ }
+ }
+
+ /*
+ * join node information group address
+ */
+#define hostnamelen strlen(hostname)
+ if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr.sin6_addr)
+ == 0) {
+ IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
+ if (in6m == NULL && ia != NULL) {
+ (void)in6_addmulti(&mltaddr.sin6_addr,
+ ifp, &error);
+ if (error != 0) {
+ log(LOG_WARNING, "in6_update_ifa: "
+ "addmulti failed for "
+ "%s on %s (errno=%d)\n",
+ ip6_sprintf(&mltaddr.sin6_addr),
+ if_name(ifp), error);
+ }
+ }
+ }
+#undef hostnamelen
+
+ /*
+ * join node-local all-nodes address, on loopback.
+ * XXX: since "node-local" is obsoleted by interface-local,
+ * we have to join the group on every interface with
+ * some interface-boundary restriction.
+ */
+ if (ifp->if_flags & IFF_LOOPBACK) {
+ struct in6_ifaddr *ia_loop;
+
+ struct in6_addr loop6 = in6addr_loopback;
+ ia_loop = in6ifa_ifpwithaddr(ifp, &loop6);
+
+ mltaddr.sin6_addr = in6addr_nodelocal_allnodes;
+
+ IN6_LOOKUP_MULTI(mltaddr.sin6_addr, ifp, in6m);
+ if (in6m == NULL && ia_loop != NULL) {
+ rtrequest(RTM_ADD,
+ (struct sockaddr *)&mltaddr,
+ (struct sockaddr *)&ia_loop->ia_addr,
+ (struct sockaddr *)&mltmask,
+ RTF_UP,
+ (struct rtentry **)0);
+ (void)in6_addmulti(&mltaddr.sin6_addr, ifp,
+ &error);
+ if (error != 0) {
+ log(LOG_WARNING, "in6_update_ifa: "
+ "addmulti failed for %s on %s "
+ "(errno=%d)\n",
+ ip6_sprintf(&mltaddr.sin6_addr),
+ if_name(ifp), error);
+ }
+ }
+ }
+ }
+
+ ia->ia6_flags = ifra->ifra_flags;
+ ia->ia6_flags &= ~IN6_IFF_DUPLICATED; /*safety*/
+ ia->ia6_flags &= ~IN6_IFF_NODAD; /* Mobile IPv6 */
+
+ 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;
+
+ /*
+ * make sure to initialize ND6 information. this is to workaround
+ * issues with interfaces with IPv6 addresses, which have never brought
+ * up. We are assuming that it is safe to nd6_ifattach multiple times.
+ */
+ nd6_ifattach(ifp);
+
+ /*
+ * Perform DAD, if needed.
+ * XXX It may be of use, if we can administratively
+ * disable DAD.
+ */
+ if (in6if_do_dad(ifp) && (ifra->ifra_flags & IN6_IFF_NODAD) == 0) {
+ ia->ia6_flags |= IN6_IFF_TENTATIVE;
+ nd6_dad_start((struct ifaddr *)ia, NULL);
+ }
+
+ return(error);
+
+ unlink:
+ /*
+ * XXX: if a change of an existing address failed, keep the entry
+ * anyway.
+ */
+ if (hostIsNew)
+ in6_unlink_ifa(ia, ifp);
+ return(error);
+}
+
void
-in6_purgeaddr(ifa, ifp)
+in6_purgeaddr(ifa)
struct ifaddr *ifa;
- struct ifnet *ifp;
{
- struct in6_ifaddr *oia, *ia = (void *) ifa;
+ struct ifnet *ifp = ifa->ifa_ifp;
+ struct in6_ifaddr *ia = (struct in6_ifaddr *) ifa;
- in6_ifscrub(ifp, ia);
+ /* stop DAD processing */
+ nd6_dad_stop(ifa);
+
+ /*
+ * delete route to the destination of the address being purged.
+ * The interface must be p2p or loopback in this case.
+ */
+ if ((ia->ia_flags & IFA_ROUTE) != 0 && ia->ia_dstaddr.sin6_len != 0) {
+ int e;
+
+ if ((e = rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST))
+ != 0) {
+ log(LOG_ERR, "in6_purgeaddr: failed to remove "
+ "a route to the p2p destination: %s on %s, "
+ "errno=%d\n",
+ ip6_sprintf(&ia->ia_addr.sin6_addr), if_name(ifp),
+ e);
+ /* proceed anyway... */
+ }
+ else
+ ia->ia_flags &= ~IFA_ROUTE;
+ }
+
+ /* Remove ownaddr's loopback rtentry, if it exists. */
+ in6_ifremloop(&(ia->ia_ifa));
if (ifp->if_flags & IFF_MULTICAST) {
/*
in6_delmulti(in6m);
}
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- if ((ifa = ifp->if_addrlist) == ia62ifa(ia))
- ifp->if_addrlist = ifa->ifa_next;
- else {
- while (ifa->ifa_next &&
- (ifa->ifa_next != ia62ifa(ia)))
- ifa = ifa->ifa_next;
- if (ifa->ifa_next)
- ifa->ifa_next = ia62ifa(ia)->ifa_next;
- else
- printf("Couldn't unlink in6_ifaddr from ifp\n");
- }
-#else
+ in6_post_msg(ifp, KEV_INET6_ADDR_DELETED, ia);
+ in6_unlink_ifa(ia, ifp);
+}
+
+static void
+in6_unlink_ifa(ia, ifp)
+ struct in6_ifaddr *ia;
+ struct ifnet *ifp;
+{
+ int plen, iilen;
+ struct in6_ifaddr *oia;
+ int s = splnet();
+
TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list);
-#endif
- IFAFREE(&ia->ia_ifa);
oia = ia;
if (oia == (ia = in6_ifaddr))
ia = ia->ia_next;
if (ia->ia_next)
ia->ia_next = oia->ia_next;
- else
- printf("Didn't unlink in6_ifaddr from list\n");
+ else {
+ /* search failed */
+ printf("Couldn't unlink in6_ifaddr from in6_ifaddr\n");
+ }
}
- {
- int iilen;
- iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) -
- in6_mask2len(&oia->ia_prefixmask.sin6_addr);
+ if (oia->ia6_ifpr) { /* check for safety */
+ plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr, NULL);
+ iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen;
in6_prefix_remove_ifid(iilen, oia);
}
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- if (oia->ia6_multiaddrs.lh_first != NULL)
- in6_savemkludge(oia);
-#endif
- IFAFREE(&oia->ia_ifa);
+ /*
+ * When an autoconfigured address is being removed, release the
+ * reference to the base prefix. Also, since the release might
+ * affect the status of other (detached) addresses, call
+ * pfxlist_onlink_check().
+ */
+ if ((oia->ia6_flags & IN6_IFF_AUTOCONF) != 0) {
+ if (oia->ia6_ndpr == NULL) {
+ log(LOG_NOTICE, "in6_unlink_ifa: autoconf'ed address "
+ "%p has no prefix\n", oia);
+ } else {
+ oia->ia6_ndpr->ndpr_refcnt--;
+ oia->ia6_flags &= ~IN6_IFF_AUTOCONF;
+ oia->ia6_ndpr = NULL;
+ }
+
+ pfxlist_onlink_check();
+ }
+
+ /*
+ * release another refcnt for the link from in6_ifaddr.
+ * Note that we should decrement the refcnt at least once for all *BSD.
+ */
+ ifafree(&oia->ia_ifa);
+
+ splx(s);
+}
+
+void
+in6_purgeif(ifp)
+ struct ifnet *ifp;
+{
+ struct ifaddr *ifa, *nifa = NULL;
+
+ if (ifp == NULL || &ifp->if_addrlist == NULL)
+ return;
+
+ for (ifa = TAILQ_FIRST(&ifp->if_addrlist); ifa != NULL; ifa = nifa)
+ {
+ nifa = TAILQ_NEXT(ifa, ifa_list);
+ if (ifa->ifa_addr == NULL)
+ continue;
+ if (ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ in6_purgeaddr(ifa);
+ }
+
+ in6_ifdetach(ifp);
}
/*
* SIOC[GAD]LIFADDR.
- * SIOCGLIFADDR: get first address. (???)
+ * SIOCGLIFADDR: get first address. (?)
* SIOCGLIFADDR with IFLR_PREFIX:
* get first address that matches the specified prefix.
* SIOCALIFADDR: add the specified address.
* address encoding scheme. (see figure on page 8)
*/
static int
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
in6_lifaddr_ioctl(so, cmd, data, ifp, p)
struct socket *so;
u_long cmd;
caddr_t data;
struct ifnet *ifp;
struct proc *p;
-#else
-in6_lifaddr_ioctl(so, cmd, data, ifp)
- struct socket *so;
- u_long cmd;
- caddr_t data;
- struct ifnet *ifp;
-#endif
{
struct if_laddrreq *iflr = (struct if_laddrreq *)data;
struct ifaddr *ifa;
/* address must be specified on GET with IFLR_PREFIX */
if ((iflr->flags & IFLR_PREFIX) == 0)
break;
- /*FALLTHROUGH*/
+ /* FALLTHROUGH */
case SIOCALIFADDR:
case SIOCDLIFADDR:
/* address must be specified on ADD and DELETE */
if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
return EINVAL;
break;
- default: /*shouldn't happen*/
+ default: /* shouldn't happen */
#if 0
panic("invalid cmd to in6_lifaddr_ioctl");
- /*NOTREACHED*/
+ /* NOTREACHED */
#else
return EOPNOTSUPP;
#endif
}
}
- 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;
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp, p);
-#else
- return in6_control(so, SIOCAIFADDR_IN6, (caddr_t)&ifra, ifp);
-#endif
}
case SIOCGLIFADDR:
case SIOCDLIFADDR:
} else {
if (cmd == SIOCGLIFADDR) {
/* on getting an address, take the 1st match */
- cmp = 0; /*XXX*/
+ cmp = 0; /* XXX */
} else {
/* on deleting an address, do exact match */
in6_len2mask(&mask, 128);
}
}
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first;
- ifa;
- ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (!cmp)
break;
+
bcopy(IFA_IN6(ifa), &candidate, sizeof(candidate));
+#ifndef SCOPEDROUTING
+ /*
+ * XXX: this is adhoc, but is necessary to allow
+ * a user to specify fe80::/64 (not /10) for a
+ * link-local address.
+ */
+ if (IN6_IS_ADDR_LINKLOCAL(&candidate))
+ candidate.s6_addr16[1] = 0;
+#endif
candidate.s6_addr32[0] &= mask.s6_addr32[0];
candidate.s6_addr32[1] &= mask.s6_addr32[1];
candidate.s6_addr32[2] &= mask.s6_addr32[2];
ia = ifa2ia6(ifa);
if (cmd == SIOCGLIFADDR) {
+#ifndef SCOPEDROUTING
+ struct sockaddr_in6 *s6;
+#endif
+
/* fill in the if_laddrreq structure */
bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin6_len);
-
+#ifndef SCOPEDROUTING /* XXX see above */
+ s6 = (struct sockaddr_in6 *)&iflr->addr;
+ if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
+ s6->sin6_addr.s6_addr16[1] = 0;
+ s6->sin6_scope_id =
+ in6_addr2scopeid(ifp, &s6->sin6_addr);
+ }
+#endif
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &iflr->dstaddr,
ia->ia_dstaddr.sin6_len);
+#ifndef SCOPEDROUTING /* XXX see above */
+ s6 = (struct sockaddr_in6 *)&iflr->dstaddr;
+ if (IN6_IS_ADDR_LINKLOCAL(&s6->sin6_addr)) {
+ s6->sin6_addr.s6_addr16[1] = 0;
+ s6->sin6_scope_id =
+ in6_addr2scopeid(ifp,
+ &s6->sin6_addr);
+ }
+#endif
} else
bzero(&iflr->dstaddr, sizeof(iflr->dstaddr));
iflr->prefixlen =
- in6_mask2len(&ia->ia_prefixmask.sin6_addr);
+ in6_mask2len(&ia->ia_prefixmask.sin6_addr,
+ NULL);
- iflr->flags = ia->ia6_flags; /*XXX*/
+ iflr->flags = ia->ia6_flags; /* XXX */
return 0;
} else {
bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
ia->ia_prefixmask.sin6_len);
- ifra.ifra_flags = ia->ia6_flags;
-#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) && !defined (__APPLE__)
- return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
- ifp, p);
-#else
- return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
- ifp);
-#endif
- }
- }
- }
-
- 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;
- u_long dl_tag;
- 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.
- */
-#ifdef __APPLE__
- error = dlil_ioctl(0, ifp, SIOCSIFADDR, (caddr_t)ia) ;
- if (error == EOPNOTSUPP)
- error = 0;
- if (error) {
-
-#else
- if (ifp->if_ioctl &&
- (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) {
-#endif
- printf("in6_ifinit SIOCSIFADDR for if=%s returns error=%x\n", if_name(ifp), error);
- 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));
-
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
- if (ifp->if_flags & IFF_MULTICAST)
- in6_restoremkludge(ia, ifp);
-#endif
-
-#ifdef __APPLE__
- printf("in6_ifinit: Attach dl_tag for if=%s%n\n", ifp->if_name, ifp->if_unit);
-
- if (strcmp(ifp->if_name, "en") == 0)
- dl_tag = ether_attach_inet6(ifp);
-
- if (strcmp(ifp->if_name, "lo") == 0)
- dl_tag = lo_attach_inet(ifp);
-#if NGIF > 0
- if (strcmp(ifp->if_name, "gif") == 0)
- dl_tag = gif_attach_inet(ifp);
-#endif
-/* End of temp code */
- ia->ia_ifa.ifa_dlt = dl_tag;
-#endif
-
- return(error);
-}
-
-#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3) && !defined (__APPLE__)
-/*
- * Multicast address kludge:
- * If there were any multicast addresses attached to this interface address,
- * either move them to another address on this interface, or save them until
- * such time as this interface is reconfigured for IPv6.
- */
-void
-in6_savemkludge(oia)
- struct in6_ifaddr *oia;
-{
- struct in6_ifaddr *ia;
- struct in6_multi *in6m, *next;
-
- IFP_TO_IA6(oia->ia_ifp, ia);
- if (ia) { /* there is another address */
- for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){
- next = in6m->in6m_entry.le_next;
- IFAFREE(&in6m->in6m_ia->ia_ifa);
- ia->ia_ifa.ifa_refcnt++;
- in6m->in6m_ia = ia;
- LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry);
- }
- } else { /* last address on this if deleted, save */
- struct multi6_kludge *mk;
-
- mk = _MALLOC(sizeof(*mk), M_IPMADDR, M_WAITOK);
-
- LIST_INIT(&mk->mk_head);
- mk->mk_ifp = oia->ia_ifp;
-
- for (in6m = oia->ia6_multiaddrs.lh_first; in6m; in6m = next){
- next = in6m->in6m_entry.le_next;
- IFAFREE(&in6m->in6m_ia->ia_ifa); /* release reference */
- in6m->in6m_ia = NULL;
- LIST_INSERT_HEAD(&mk->mk_head, in6m, in6m_entry);
- }
-
- if (mk->mk_head.lh_first != NULL) {
- LIST_INSERT_HEAD(&in6_mk, mk, mk_entry);
- } else {
- FREE(mk, M_IPMADDR);
+ ifra.ifra_flags = ia->ia6_flags;
+ return in6_control(so, SIOCDIFADDR_IN6, (caddr_t)&ifra,
+ ifp, p);
}
+ }
}
+
+ return EOPNOTSUPP; /* just for safety */
}
/*
- * Continuation of multicast address hack:
- * If there was a multicast group list previously saved for this interface,
- * then we re-attach it to the first address configured on the i/f.
+ * Initialize an interface's intetnet6 address
+ * and routing table entry.
*/
-void
-in6_restoremkludge(ia, ifp)
- struct in6_ifaddr *ia;
- struct ifnet *ifp;
-{
- struct multi6_kludge *mk;
-
- for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) {
- if (mk->mk_ifp == ifp) {
- struct in6_multi *in6m, *next;
-
- for (in6m = mk->mk_head.lh_first; in6m; in6m = next){
- next = in6m->in6m_entry.le_next;
- in6m->in6m_ia = ia;
- ia->ia_ifa.ifa_refcnt++;
- LIST_INSERT_HEAD(&ia->ia6_multiaddrs,
- in6m, in6m_entry);
- }
- LIST_REMOVE(mk, mk_entry);
- _FREE(mk, M_IPMADDR);
- break;
- }
- }
-}
-
-void
-in6_purgemkludge(ifp)
+static int
+in6_ifinit(ifp, ia, sin6, newhost)
struct ifnet *ifp;
+ struct in6_ifaddr *ia;
+ struct sockaddr_in6 *sin6;
+ int newhost;
{
- struct multi6_kludge *mk;
- struct in6_multi *in6m;
+ int error = 0, plen, ifacount = 0;
+ int s = splimp();
+ struct ifaddr *ifa;
- for (mk = in6_mk.lh_first; mk; mk = mk->mk_entry.le_next) {
- if (mk->mk_ifp != ifp)
+ /*
+ * Give the interface a chance to initialize
+ * if this is its first address,
+ * and to validate the address if necessary.
+ */
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
+ {
+ if (ifa->ifa_addr == NULL)
+ continue; /* just for safety */
+ if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
-
- /* leave from all multicast groups joined */
- while ((in6m = LIST_FIRST(&mk->mk_head)) != NULL)
- in6_delmulti(in6m);
- LIST_REMOVE(mk, mk_entry);
- _FREE(mk, M_IPMADDR);
- break;
+ ifacount++;
}
-}
-/*
- * 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_ifaddr *ia;
- struct in6_ifreq ifr;
- struct in6_multi *in6m;
-#if __NetBSD__
- int s = splsoftnet();
-#else
- int s = splnet();
-#endif
+ ia->ia_addr = *sin6;
- *errorp = 0;
- /*
- * See if address already in list.
- */
- IN6_LOOKUP_MULTI(*maddr6, ifp, in6m);
- if (in6m != NULL) {
- /*
- * Found it; just increment the refrence count.
- */
- in6m->in6m_refcount++;
- } else {
- /*
- * New address; allocate a new multicast record
- * and link it into the interface's multicast list.
- */
- in6m = (struct in6_multi *)
- _MALLOC(sizeof(*in6m), M_IPMADDR, M_NOTWAIT);
- if (in6m == NULL) {
- splx(s);
- *errorp = ENOBUFS;
- return(NULL);
- }
- in6m->in6m_addr = *maddr6;
- in6m->in6m_ifp = ifp;
- in6m->in6m_refcount = 1;
- IFP_TO_IA6(ifp, ia);
- if (ia == NULL) {
- _FREE(in6m, M_IPMADDR);
- splx(s);
- *errorp = EADDRNOTAVAIL; /* appropriate? */
- return(NULL);
- }
- in6m->in6m_ia = ia;
- ia->ia_ifa.ifa_refcnt++; /* gain a reference */
- LIST_INSERT_HEAD(&ia->ia6_multiaddrs, in6m, in6m_entry);
- /*
- * Ask the network driver to update its multicast reception
- * filter appropriately for the new address.
- */
- bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6));
- ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6);
- ifr.ifr_addr.sin6_family = AF_INET6;
- ifr.ifr_addr.sin6_addr = *maddr6;
+ if (ifacount <= 1 &&
#ifdef __APPLE__
- *errorp = dlil_ioctl(0, ifp, SIOCADDMULTI, (caddr_t)&ifr);
- printf("in6_addmulti: if=%s%n dlil_ioctl returns=%d\n", ifp->if_name, ifp->if_unit, *errorp);
- if (*errorp == EOPNOTSUPP)
- *errorp = 0;
-
-#else
- if (ifp->if_ioctl == NULL)
- *errorp = ENXIO; /* XXX: appropriate? */
- else
- *errorp = (*ifp->if_ioctl)(ifp, SIOCADDMULTI,
- (caddr_t)&ifr);
-#endif
- if (*errorp) {
- LIST_REMOVE(in6m, in6m_entry);
- _FREE(in6m, M_IPMADDR);
+ (error = dlil_ioctl(PF_INET6, ifp, SIOCSIFADDR, (caddr_t)ia))) {
+ if (error) {
splx(s);
- return(NULL);
+ return(error);
}
- /*
- * 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 in6_ifreq ifr;
-#if __NetBSD__
- int s = splsoftnet();
#else
- int s = splnet();
+ ifp->if_ioctl && (error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia))) {
+ splx(s);
+ return(error);
+ }
#endif
+ splx(s);
- if (--in6m->in6m_refcount == 0) {
- /*
- * No remaining claims to this record; let MLD6 know
- * that we are leaving the multicast group.
- */
- mld6_stop_listening(in6m);
+ ia->ia_ifa.ifa_metric = ifp->if_metric;
- /*
- * Unlink from list.
- */
- LIST_REMOVE(in6m, in6m_entry);
- if (in6m->in6m_ia)
- IFAFREE(&in6m->in6m_ia->ia_ifa); /* release reference */
+ /* we could do in(6)_socktrim here, but just omit it at this moment. */
+ /*
+ * Special case:
+ * If the destination address is specified for a point-to-point
+ * interface, install a route to the destination as an interface
+ * direct route.
+ */
+ plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
+ if (plen == 128 && ia->ia_dstaddr.sin6_family == AF_INET6) {
+ if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
+ RTF_UP | RTF_HOST)) != 0)
+ return(error);
+ ia->ia_flags |= IFA_ROUTE;
+ }
+ if (plen < 128) {
/*
- * Notify the network driver to update its multicast
- * reception filter.
+ * The RTF_CLONING flag is necessary for in6_is_ifloop_auto().
*/
- bzero(&ifr.ifr_addr, sizeof(struct sockaddr_in6));
- ifr.ifr_addr.sin6_len = sizeof(struct sockaddr_in6);
- ifr.ifr_addr.sin6_family = AF_INET6;
- ifr.ifr_addr.sin6_addr = in6m->in6m_addr;
-#ifdef __APPLE__
- dlil_ioctl(0, in6m->in6m_ifp, SIOCDELMULTI, (caddr_t)&ifr);
-#else
- (*in6m->in6m_ifp->if_ioctl)(in6m->in6m_ifp,
- SIOCDELMULTI, (caddr_t)&ifr);
-#endif
- _FREE(in6m, M_IPMADDR);
+ ia->ia_ifa.ifa_flags |= RTF_CLONING;
}
- splx(s);
+
+ /* Add ownaddr as loopback rtentry, if necessary (ex. on p2p link). */
+ if (newhost) {
+ /* set the rtrequest function to create llinfo */
+ ia->ia_ifa.ifa_rtrequest = nd6_rtrequest;
+ in6_ifaddloop(&(ia->ia_ifa));
+ }
+
+ return(error);
}
-#else /* not FreeBSD3 */
+
/*
* 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;
+ struct in6_addr *maddr6;
+ struct ifnet *ifp;
int *errorp;
{
struct in6_multi *in6m;
struct ifmultiaddr *ifma = in6m->in6m_ifma;
int s = splnet();
- if (ifma->ifma_refcount == 1) {
+ if (ifma && 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);
+ FREE(in6m, M_IPMADDR);
}
/* XXX - should be separate API for when we have an ifma? */
- if_delmulti(ifma->ifma_ifp, ifma->ifma_addr);
+ if (ifma)
+ if_delmultiaddr(ifma);
splx(s);
}
-#endif /* not FreeBSD3 */
/*
* Find an IPv6 interface link-local address specific to an interface.
struct ifnet *ifp;
int ignoreflags;
{
- register struct ifaddr *ifa;
+ struct ifaddr *ifa;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr == NULL)
continue; /* just for safety */
struct ifnet *ifp;
struct in6_addr *addr;
{
- register struct ifaddr *ifa;
+ struct ifaddr *ifa;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr == NULL)
continue; /* just for safety */
static int ip6round = 0;
char *
ip6_sprintf(addr)
-register struct in6_addr *addr;
+ const 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 i;
+ char *cp;
+ const u_short *a = (const u_short *)addr;
+ const u_char *d;
int dcolon = 0;
ip6round = (ip6round + 1) & 7;
a++;
continue;
}
- d = (u_char *)a;
+ d = (const u_char *)a;
*cp++ = digits[*d >> 4];
*cp++ = digits[*d++ & 0xf];
*cp++ = digits[*d >> 4];
return (0);
}
-/*
- * Get a scope of the address. Node-local, link-local, site-local or global.
- */
int
-in6_addrscope (addr)
-struct in6_addr *addr;
+in6_is_addr_deprecated(sa6)
+ struct sockaddr_in6 *sa6;
{
- 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;
+ struct in6_ifaddr *ia;
- /*
- * 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;
- }
- }
+ for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
+ if (IN6_ARE_ADDR_EQUAL(&ia->ia_addr.sin6_addr,
+ &sa6->sin6_addr) &&
+#if SCOPEDROUTING
+ ia->ia_addr.sin6_scope_id == sa6->sin6_scope_id &&
+#endif
+ (ia->ia6_flags & IN6_IFF_DEPRECATED) != 0)
+ return(1); /* true */
- 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;
+ /* XXX: do we still have to go thru the rest of the list? */
}
- return IPV6_ADDR_SCOPE_GLOBAL;
-}
-
-int
-in6_addr2scopeid(ifp, addr)
- struct ifnet *ifp; /* must not be NULL */
- struct in6_addr *addr; /* must not be NULL */
-{
- int scope = in6_addrscope(addr);
-
- switch(scope) {
- case IPV6_ADDR_SCOPE_NODELOCAL:
- return(-1); /* XXX: is this an appropriate value? */
-
- case IPV6_ADDR_SCOPE_LINKLOCAL:
- /* XXX: we do not distinguish between a link and an I/F. */
- return(ifp->if_index);
-
- case IPV6_ADDR_SCOPE_SITELOCAL:
- return(0); /* XXX: invalid. */
-
- default:
- return(0); /* XXX: treat as global. */
- }
+ return(0); /* false */
}
/*
* return length of part which dst and src are equal
* hard coding...
*/
-
int
in6_matchlen(src, dst)
struct in6_addr *src, *dst;
return match;
}
+/* XXX: to be scope conscious */
int
in6_are_prefix_equal(p1, p2, len)
struct in6_addr *p1, *p2;
*/
struct in6_ifaddr *
in6_ifawithscope(oifp, dst)
- register struct ifnet *oifp;
- register struct in6_addr *dst;
+ struct ifnet *oifp;
+ struct in6_addr *dst;
{
int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
int blen = -1;
struct in6_ifaddr *ifa_best = NULL;
if (oifp == NULL) {
+#if 0
printf("in6_ifawithscope: output interface is not specified\n");
+#endif
return(NULL);
}
* Comparing an interface with the outgoing interface will be done
* only at the final stage of tiebreaking.
*/
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifp = ifnet; ifp; ifp = ifp->if_next)
-#else
for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
-#endif
{
/*
* We can never take an address that breaks the scope zone
if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
continue;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#elif defined(__FreeBSD__) && __FreeBSD__ >= 4
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa;
- ifa = ifa->ifa_list.tqe_next)
-#endif
{
int tlen = -1, dscopecmp, bscopecmp, matchcmp;
src_scope = in6_addrscope(IFA_IN6(ifa));
-#if ADDRSELECT_DEBUG /* should be removed after stabilization */
- dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
- printf("in6_ifawithscope: dst=%s bestaddr=%s, "
- "newaddr=%s, scope=%x, dcmp=%d, bcmp=%d, "
- "matchlen=%d, flgs=%x\n",
- ip6_sprintf(dst),
- ifa_best ? ip6_sprintf(&ifa_best->ia_addr.sin6_addr) : "none",
- ip6_sprintf(IFA_IN6(ifa)), src_scope,
- dscopecmp,
- ifa_best ? IN6_ARE_SCOPE_CMP(src_scope, best_scope) : -1,
- in6_matchlen(IFA_IN6(ifa), dst),
- ((struct in6_ifaddr *)ifa)->ia6_flags);
-#endif
-
/*
* Don't use an address before completing DAD
* nor a duplicated address.
* Also, if the current address has a smaller scope
* than dst, ignore it unless ifa_best also has a
* smaller scope.
+ * Consequently, after the two if-clause below,
+ * the followings must be satisfied:
+ * (scope(src) < scope(dst) &&
+ * scope(best) < scope(dst))
+ * OR
+ * (scope(best) >= scope(dst) &&
+ * scope(src) >= scope(dst))
*/
if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
- goto replace;
+ goto replace; /* (A) */
if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
- continue;
+ continue; /* (B) */
/*
* A deprecated address SHOULD NOT be used in new
/*
* A non-deprecated address is always preferred
* to a deprecated one regardless of scopes and
- * address matching.
+ * address matching (Note invariants ensured by the
+ * conditions (A) and (B) above.)
*/
if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
(((struct in6_ifaddr *)ifa)->ia6_flags &
IN6_IFF_DEPRECATED) == 0)
goto replace;
+ /*
+ * When we use temporary addresses described in
+ * RFC 3041, we prefer temporary addresses to
+ * public autoconf addresses. Again, note the
+ * invariants from (A) and (B). Also note that we
+ * don't have any preference between static addresses
+ * and autoconf addresses (despite of whether or not
+ * the latter is temporary or public.)
+ */
+ if (ip6_use_tempaddr) {
+ struct in6_ifaddr *ifat;
+
+ ifat = (struct in6_ifaddr *)ifa;
+ if ((ifa_best->ia6_flags &
+ (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
+ == IN6_IFF_AUTOCONF &&
+ (ifat->ia6_flags &
+ (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
+ == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY)) {
+ goto replace;
+ }
+ if ((ifa_best->ia6_flags &
+ (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
+ == (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY) &&
+ (ifat->ia6_flags &
+ (IN6_IFF_AUTOCONF|IN6_IFF_TEMPORARY))
+ == IN6_IFF_AUTOCONF) {
+ continue;
+ }
+ }
+
/*
* At this point, we have two cases:
* 1. we are looking at a non-deprecated address,
* Smaller scopes are the last resort.
* - A deprecated address is chosen only when we have
* no address that has an enough scope, but is
- * prefered to any addresses of smaller scopes.
- * - Longest address match against dst is considered
- * only for addresses that has the same scope of dst.
+ * prefered to any addresses of smaller scopes
+ * (this must be already done above.)
+ * - addresses on the outgoing I/F are preferred to
+ * ones on other interfaces if none of above
+ * tiebreaks. In the table below, the column "bI"
+ * means if the best_ifa is on the outgoing
+ * interface, and the column "sI" means if the ifa
+ * is on the outgoing interface.
* - If there is no other reasons to choose one,
- * addresses on the outgoing I/F are preferred.
+ * longest address match against dst is considered.
*
* The precise decision table is as follows:
- * dscopecmp bscopecmp matchcmp outI/F | replace?
- * !equal equal N/A Yes | Yes (1)
- * !equal equal N/A No | No (2)
- * larger larger N/A N/A | No (3)
- * larger smaller N/A N/A | Yes (4)
- * smaller larger N/A N/A | Yes (5)
- * smaller smaller N/A N/A | No (6)
- * equal smaller N/A N/A | Yes (7)
- * equal larger (already done)
- * equal equal larger N/A | Yes (8)
- * equal equal smaller N/A | No (9)
- * equal equal equal Yes | Yes (a)
- * eaual eqaul equal No | No (b)
+ * dscopecmp bscopecmp match bI oI | replace?
+ * N/A equal N/A Y N | No (1)
+ * N/A equal N/A N Y | Yes (2)
+ * N/A equal larger N/A | Yes (3)
+ * N/A equal !larger N/A | No (4)
+ * larger larger N/A N/A | No (5)
+ * larger smaller N/A N/A | Yes (6)
+ * smaller larger N/A N/A | Yes (7)
+ * smaller smaller N/A N/A | No (8)
+ * equal smaller N/A N/A | Yes (9)
+ * equal larger (already done at A above)
*/
dscopecmp = IN6_ARE_SCOPE_CMP(src_scope, dst_scope);
bscopecmp = IN6_ARE_SCOPE_CMP(src_scope, best_scope);
- if (dscopecmp && bscopecmp == 0) {
- if (oifp == ifp) /* (1) */
+ if (bscopecmp == 0) {
+ struct ifnet *bifp = ifa_best->ia_ifp;
+
+ if (bifp == oifp && ifp != oifp) /* (1) */
+ continue;
+ if (bifp != oifp && ifp == oifp) /* (2) */
+ goto replace;
+
+ /*
+ * Both bifp and ifp are on the outgoing
+ * interface, or both two are on a different
+ * interface from the outgoing I/F.
+ * now we need address matching against dst
+ * for tiebreaking.
+ */
+ tlen = in6_matchlen(IFA_IN6(ifa), dst);
+ matchcmp = tlen - blen;
+ if (matchcmp > 0) /* (3) */
goto replace;
- continue; /* (2) */
+ continue; /* (4) */
}
if (dscopecmp > 0) {
- if (bscopecmp > 0) /* (3) */
+ if (bscopecmp > 0) /* (5) */
continue;
- goto replace; /* (4) */
+ goto replace; /* (6) */
}
if (dscopecmp < 0) {
- if (bscopecmp > 0) /* (5) */
+ if (bscopecmp > 0) /* (7) */
goto replace;
- continue; /* (6) */
+ continue; /* (8) */
}
/* now dscopecmp must be 0 */
if (bscopecmp < 0)
- goto replace; /* (7) */
-
- /*
- * At last both dscopecmp and bscopecmp must be 0.
- * We need address matching against dst for
- * tiebreaking.
- */
- tlen = in6_matchlen(IFA_IN6(ifa), dst);
- matchcmp = tlen - blen;
- if (matchcmp > 0) /* (8) */
- goto replace;
- if (matchcmp < 0) /* (9) */
- continue;
- if (oifp == ifp) /* (a) */
- goto replace;
- continue; /* (b) */
+ goto replace; /* (9) */
replace:
ifa_best = (struct in6_ifaddr *)ifa;
* 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;
+ struct ifnet *ifp;
+ 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*/
+ struct in6_ifaddr *dep[2]; /* last-resort: deprecated */
dep[0] = dep[1] = NULL;
-#if 0
-#if MIP6
- /*
- * This is needed to assure that the Home Address is used for
- * outgoing packets when not at home. We can't choose any other
- * address if we want to keep connections up during movement.
- */
- if (mip6_get_home_prefix_hook) { /* Only Mobile Node */
- struct nd_prefix *pr;
- if ((pr = (*mip6_get_home_prefix_hook)()) &&
- !IN6_IS_ADDR_UNSPECIFIED(&pr->ndpr_addr))
- {
- if (dst_scope == in6_addrscope(&pr->ndpr_addr)) {
-#if MIP6_DEBUG
- /* Noisy but useful */
- mip6_debug("%s: Local address %s is chosen "
- "for pcb to dest %s.\n",
- __FUNCTION__,
- ip6_sprintf(&pr->ndpr_addr),
- ip6_sprintf(dst));
-#endif
- return(in6ifa_ifpwithaddr(ifp, &pr->ndpr_addr));
- }
- }
- }
-#endif /* MIP6 */
-#endif /* 0 */
-
/*
* 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.
*/
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
if (besta)
return(besta);
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
return NULL;
}
+extern int in6_init2done;
+
/*
* perform DAD when interface becomes IFF_UP.
*/
void
-in6_if_up(ifp)
+in6_if_up(ifp, ifra)
struct ifnet *ifp;
+ struct in6_aliasreq *ifra;
{
struct ifaddr *ifa;
struct in6_ifaddr *ia;
- struct sockaddr_dl *sdl;
- int type;
-#if __bsdi__
- u_char ea[ETHER_ADDR_LEN];
-#else
- struct ether_addr ea;
-#endif
- int off;
int dad_delay; /* delay ticks before DAD output */
- bzero(&ea, sizeof(ea));
- sdl = NULL;
+ if (!in6_init2done)
+ return;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
+ /*
+ * special cases, like 6to4, are handled in in6_ifattach
+ */
+ in6_ifattach(ifp, NULL, ifra);
+
+ dad_delay = 0;
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
- 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)
+ if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
- sdl = (struct sockaddr_dl *)ifa->ifa_addr;
- break;
+ ia = (struct in6_ifaddr *)ifa;
+ if (ia->ia6_flags & IN6_IFF_TENTATIVE)
+ nd6_dad_start(ifa, &dad_delay);
}
+}
+
+int
+in6if_do_dad(ifp)
+ struct ifnet *ifp;
+{
+ if ((ifp->if_flags & IFF_LOOPBACK) != 0)
+ return(0);
switch (ifp->if_type) {
- case IFT_LOOP:
- in6_ifattach(ifp, IN6_IFT_LOOP, NULL, 1);
- break;
- case IFT_SLIP:
- case IFT_PPP:
+#if IFT_DUMMY
case IFT_DUMMY:
- case IFT_GIF:
+#endif
case IFT_FAITH:
- type = IN6_IFT_P2P;
- in6_ifattach(ifp, type, 0, 1);
- break;
-#if IFT_STF
- case IFT_STF:
/*
- * This is VERY awkward to call nd6_ifattach while we will
- * not do ND at all on the interface. It is necessary for
- * initializing default hoplimit, and ND mtu.
+ * These interfaces do not have the IFF_LOOPBACK flag,
+ * but loop packets back. We do not have to do DAD on such
+ * interfaces. We should even omit it, because loop-backed
+ * NS would confuse the DAD procedure.
*/
- nd6_ifattach(ifp);
- break;
-#endif
- 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;
+ return(0);
default:
- break;
- }
+ /*
+ * Our DAD routine requires the interface up and running.
+ * However, some interfaces can be up before the RUNNING
+ * status. Additionaly, users may try to assign addresses
+ * before the interface becomes up (or running).
+ * We simply skip DAD in such a case as a work around.
+ * XXX: we should rather mark "tentative" on such addresses,
+ * and do DAD after the interface becomes ready.
+ */
+ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) !=
+ (IFF_UP|IFF_RUNNING))
+ return(0);
-dad:
- dad_delay = 0;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
-#else
- for (ifa = ifp->if_addrlist.tqh_first; ifa; ifa = ifa->ifa_list.tqe_next)
-#endif
- {
- 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);
+ return(1);
}
}
unsigned long maxmtu = 0;
struct ifnet *ifp;
-#if defined(__bsdi__) || (defined(__FreeBSD__) && __FreeBSD__ < 3)
- for (ifp = ifnet; ifp; ifp = ifp->if_next)
-#else
for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
-#endif
{
if ((ifp->if_flags & IFF_LOOPBACK) == 0 &&
nd_ifinfo[ifp->if_index].linkmtu > maxmtu)
in6_maxmtu = maxmtu;
}
-#if MAPPED_ADDR_ENABLED
-/*
- * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
+/*
+ * Convert sockaddr_in6 to sockaddr_in. Original sockaddr_in6 must be
* v4 mapped addr or v4 compat addr
*/
void
FREE(*nam, M_SONAME);
*nam = (struct sockaddr *)sin6_p;
}
-#endif /* MAPPED_ADDR_ENABLED */
+/* Posts in6_event_data message kernel events */
+void
+in6_post_msg(struct ifnet *ifp, u_long event_code, struct in6_ifaddr *ifa)
+{
+ struct kev_msg ev_msg;
+ struct kev_in6_data in6_event_data;
+
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+ ev_msg.kev_class = KEV_NETWORK_CLASS;
+ ev_msg.kev_subclass = KEV_INET6_SUBCLASS;
+ ev_msg.event_code = event_code;
+
+ in6_event_data.ia_addr = ifa->ia_addr;
+ in6_event_data.ia_net = ifa->ia_net;
+ in6_event_data.ia_dstaddr = ifa->ia_dstaddr;
+ in6_event_data.ia_prefixmask = ifa->ia_prefixmask;
+ in6_event_data.ia_plen = ifa->ia_plen;
+ in6_event_data.ia6_flags = (u_int32_t)ifa->ia6_flags;
+ in6_event_data.ia_lifetime = ifa->ia6_lifetime;
+
+ if (ifp != NULL) {
+ strncpy(&in6_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ);
+ in6_event_data.link_data.if_family = ifp->if_family;
+ in6_event_data.link_data.if_unit = (unsigned long) ifp->if_unit;
+ }
+
+ ev_msg.dv[0].data_ptr = &in6_event_data;
+ ev_msg.dv[0].data_length = sizeof(struct kev_in6_data);
+ ev_msg.dv[1].data_length = 0;
+
+ kev_post_msg(&ev_msg);
+}
projects / apple / xnu.git / blobdiff