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Diffstat (limited to 'sys/netinet6/in6.c')
-rw-r--r--sys/netinet6/in6.c968
1 files changed, 541 insertions, 427 deletions
diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
index 234bd52..2d6ce68 100644
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -1,3 +1,6 @@
+/* $FreeBSD$ */
+/* $KAME: in6.c,v 1.87 2000/07/03 15:44:21 itojun Exp $ */
+
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
@@ -25,8 +28,6 @@
* 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.
- *
- * $FreeBSD$
*/
/*
@@ -64,6 +65,9 @@
* @(#)in.c 8.2 (Berkeley) 11/15/93
*/
+#include "opt_inet.h"
+#include "opt_inet6.h"
+
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/malloc.h>
@@ -79,8 +83,6 @@
#include <net/if.h>
#include <net/if_types.h>
#include <net/route.h>
-#include "gif.h"
-
#include <net/if_dl.h>
#include <netinet/in.h>
@@ -88,10 +90,14 @@
#include <netinet/if_ether.h>
#include <netinet6/nd6.h>
-#include <netinet6/ip6.h>
+#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/mld6_var.h>
+#include <netinet6/ip6_mroute.h>
#include <netinet6/in6_ifattach.h>
+#include <netinet6/scope6_var.h>
+
+#include "gif.h"
#if NGIF > 0
#include <net/if_gif.h>
#endif
@@ -103,40 +109,25 @@ 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 =
+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 =
+const struct in6_addr in6addr_linklocal_allnodes =
IN6ADDR_LINKLOCAL_ALLNODES_INIT;
-const struct in6_addr in6addr_linklocal_allrouters =
+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;
+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,
+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);
-}
+struct in6_multihead in6_multihead; /* XXX BSS initialization */
/*
* Check if the loopback entry will be automatically generated.
@@ -184,7 +175,11 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa)
lo_sa.sin6_addr = in6addr_loopback;
all1_sa.sin6_addr = in6mask128;
- /* So we add or remove static loopback entry, here. */
+ /*
+ * So we add or remove static loopback entry, here.
+ * This request for deletion could fail, e.g. when we remove
+ * an address right after adding it.
+ */
rtrequest(cmd, ifa->ifa_addr,
(struct sockaddr *)&lo_sa,
(struct sockaddr *)&all1_sa,
@@ -198,7 +193,7 @@ in6_ifloop_request(int cmd, struct ifaddr *ifa)
* loopback address.
*/
if (cmd == RTM_ADD && nrt && ifa != nrt->rt_ifa) {
- nrt->rt_ifa->ifa_refcnt--;
+ IFAFREE(nrt->rt_ifa);
ifa->ifa_refcnt++;
nrt->rt_ifa = ifa;
}
@@ -233,10 +228,18 @@ in6_ifaddloop(struct ifaddr *ifa)
static void
in6_ifremloop(struct ifaddr *ifa)
{
- if (!in6_is_ifloop_auto(ifa)) {
- struct in6_ifaddr *ia;
- int ia_count = 0;
+ struct in6_ifaddr *ia;
+ int ia_count = 0;
+ /*
+ * All BSD variants except BSD/OS do not remove cloned routes
+ * from an interface direct route, when removing the direct route
+ * (see commens in net/net_osdep.h).
+ * So we should remove the route corresponding to the deleted address
+ * regardless of the result of in6_is_ifloop_auto().
+ */
+ if (1)
+ {
/* 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),
@@ -251,90 +254,6 @@ in6_ifremloop(struct ifaddr *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;
@@ -393,10 +312,8 @@ in6_len2mask(mask, len)
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))
+#define ia62ifa(ia6) (&((ia6)->ia_ifa))
int
in6_control(so, cmd, data, ifp, p)
@@ -407,10 +324,14 @@ in6_control(so, cmd, data, ifp, p)
struct proc *p;
{
struct in6_ifreq *ifr = (struct in6_ifreq *)data;
- struct in6_ifaddr *ia, *oia;
+ struct in6_ifaddr *ia = NULL, *oia;
struct in6_aliasreq *ifra = (struct in6_aliasreq *)data;
- struct sockaddr_in6 oldaddr, net;
- int error = 0, hostIsNew, prefixIsNew;
+ struct sockaddr_in6 oldaddr;
+#ifdef COMPAT_IN6IFIOCTL
+ struct sockaddr_in6 net;
+#endif
+ int error = 0, hostIsNew, prefixIsNew;
+ int newifaddr;
int privileged;
privileged = 0;
@@ -433,14 +354,21 @@ in6_control(so, cmd, data, ifp, p)
}
}
#endif
+ switch (cmd) {
+ case SIOCGETSGCNT_IN6:
+ case SIOCGETMIFCNT_IN6:
+ return (mrt6_ioctl(cmd, data));
+ }
- if (ifp == 0)
+ if (ifp == NULL)
return(EOPNOTSUPP);
switch (cmd) {
case SIOCSNDFLUSH_IN6:
case SIOCSPFXFLUSH_IN6:
case SIOCSRTRFLUSH_IN6:
+ case SIOCSDEFIFACE_IN6:
+ case SIOCSIFINFO_FLAGS:
if (!privileged)
return(EPERM);
/*fall through*/
@@ -448,6 +376,7 @@ in6_control(so, cmd, data, ifp, p)
case SIOCGDRLST_IN6:
case SIOCGPRLST_IN6:
case SIOCGNBRINFO_IN6:
+ case SIOCGDEFIFACE_IN6:
return(nd6_ioctl(cmd, data, ifp));
}
@@ -466,6 +395,20 @@ in6_control(so, cmd, data, ifp, p)
return(in6_prefix_ioctl(so, cmd, data, ifp));
}
+ switch(cmd) {
+ case SIOCSSCOPE6:
+ if (!privileged)
+ return(EPERM);
+ 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 SIOCALIFADDR:
case SIOCDLIFADDR:
@@ -479,8 +422,7 @@ in6_control(so, cmd, data, ifp, p)
/*
* Find address for this interface, if it exists.
*/
- {
-
+ if (ifra->ifra_addr.sin6_family == AF_INET6) { /* XXX */
struct sockaddr_in6 *sa6 =
(struct sockaddr_in6 *)&ifra->ifra_addr;
@@ -489,10 +431,10 @@ in6_control(so, cmd, data, ifp, p)
/* 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 */
+ } 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)
@@ -500,30 +442,61 @@ in6_control(so, cmd, data, ifp, p)
sa6->sin6_scope_id = 0; /* XXX: good way? */
}
}
+ ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
}
- ia = in6ifa_ifpwithaddr(ifp, &ifra->ifra_addr.sin6_addr);
switch (cmd) {
case SIOCDIFADDR_IN6:
- if (ia == 0)
+ /*
+ * for IPv4, we look for existing in6_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.
+ */
+ if (ia == NULL)
return(EADDRNOTAVAIL);
/* FALLTHROUGH */
case SIOCAIFADDR_IN6:
case SIOCSIFADDR_IN6:
- case SIOCSIFNETMASK_IN6:
+#ifdef 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.
+ */
+#endif
+ if (ifra->ifra_addr.sin6_family != AF_INET6)
+ return(EAFNOSUPPORT);
if (!privileged)
return(EPERM);
- if (ia == 0) {
+ 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_ifa.ifa_dstaddr
- = (struct sockaddr *)&ia->ia_dstaddr;
+ ia->ia_addr.sin6_family = AF_INET6;
+ ia->ia_addr.sin6_len = sizeof(ia->ia_addr);
+#if 1
+ 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));
+ }
+#else /* always initilize by NULL */
+ ia->ia_ifa.ifa_dstaddr = NULL;
+ bzero(&ia->ia_dstaddr, sizeof(ia->ia_dstaddr));
+#endif
ia->ia_ifa.ifa_netmask
= (struct sockaddr *)&ia->ia_prefixmask;
@@ -534,11 +507,17 @@ in6_control(so, cmd, data, ifp, p)
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*/
- }
+ /* gain a refcnt for the link from in6_ifaddr */
+ ia->ia_ifa.ifa_refcnt++;
+
+ TAILQ_INSERT_TAIL(&ifp->if_addrlist, &ia->ia_ifa,
+ ifa_list);
+ /* gain another refcnt for the link from if_addrlist */
+ ia->ia_ifa.ifa_refcnt++;
+
+ newifaddr = 1;
+ } else
+ newifaddr = 0;
if (cmd == SIOCAIFADDR_IN6) {
/* sanity for overflow - beware unsigned */
@@ -563,7 +542,7 @@ in6_control(so, cmd, data, ifp, p)
case SIOCGIFDSTADDR_IN6:
case SIOCGIFALIFETIME_IN6:
/* must think again about its semantics */
- if (ia == 0)
+ if (ia == NULL)
return(EADDRNOTAVAIL);
break;
case SIOCSIFALIFETIME_IN6:
@@ -572,7 +551,7 @@ in6_control(so, cmd, data, ifp, p)
if (!privileged)
return(EPERM);
- if (ia == 0)
+ if (ia == NULL)
return(EADDRNOTAVAIL);
/* sanity for overflow - beware unsigned */
lt = &ifr->ifr_ifru.ifru_lifetime;
@@ -597,6 +576,10 @@ in6_control(so, cmd, data, ifp, p)
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;
@@ -633,6 +616,7 @@ in6_control(so, cmd, data, ifp, p)
*icmp6_ifstat[ifp->if_index];
break;
+#ifdef COMPAT_IN6IFIOCTL /* should be unused */
case SIOCSIFDSTADDR_IN6:
if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
return(EINVAL);
@@ -645,12 +629,11 @@ in6_control(so, cmd, data, ifp, p)
/* 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] !=
+ } else if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] !=
htons(ifp->if_index)) {
- ia->ia_dstaddr = oldaddr;
- return(EINVAL); /* ifid is contradict */
- }
+ ia->ia_dstaddr = oldaddr;
+ return(EINVAL); /* ifid is contradict */
+ }
}
if (ifp->if_ioctl && (error = (ifp->if_ioctl)
@@ -658,6 +641,7 @@ in6_control(so, cmd, data, ifp, p)
ia->ia_dstaddr = oldaddr;
return(error);
}
+ ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr;
if (ia->ia_flags & IFA_ROUTE) {
ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr;
rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST);
@@ -667,6 +651,7 @@ in6_control(so, cmd, data, ifp, p)
}
break;
+#endif
case SIOCGIFALIFETIME_IN6:
ifr->ifr_ifru.ifru_lifetime = ia->ia6_lifetime;
break;
@@ -687,8 +672,41 @@ in6_control(so, cmd, data, ifp, p)
break;
case SIOCSIFADDR_IN6:
- return(in6_ifinit(ifp, ia, &ifr->ifr_addr, 1));
+ 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) {
+ TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list);
+ /* release a refcnt for the link from if_addrlist */
+ 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");
+ }
+ }
+ /* release another refcnt for the link from in6_ifaddr */
+ IFAFREE(&oia->ia_ifa);
+ }
+#endif
+ return error;
+#ifdef COMPAT_IN6IFIOCTL /* XXX should be unused */
case SIOCSIFNETMASK_IN6:
ia->ia_prefixmask = ifr->ifr_addr;
bzero(&net, sizeof(net));
@@ -710,6 +728,7 @@ in6_control(so, cmd, data, ifp, p)
ia->ia_prefixmask.sin6_addr.s6_addr32[3];
ia->ia_net = net;
break;
+#endif
case SIOCAIFADDR_IN6:
prefixIsNew = 0;
@@ -722,6 +741,22 @@ in6_control(so, cmd, data, ifp, p)
&ia->ia_addr.sin6_addr))
hostIsNew = 0;
+ /* Validate address families: */
+ /*
+ * 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);
+ /*
+ * The prefixmask must have a family of AF_UNSPEC or AF_INET6.
+ */
+ 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;
@@ -730,6 +765,7 @@ in6_control(so, cmd, data, ifp, p)
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)) {
@@ -740,20 +776,22 @@ in6_control(so, cmd, data, ifp, p)
*/
ia->ia_dstaddr.sin6_addr.s6_addr16[1]
= htons(ifp->if_index);
- } else
- if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] !=
+ } else if (ia->ia_dstaddr.sin6_addr.s6_addr16[1] !=
htons(ifp->if_index)) {
- ia->ia_dstaddr = oldaddr;
- return(EINVAL); /* ifid is contradict */
- }
+ 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))
+ if (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)) {
+#if 0
+ if (error)
+ goto undo;
+#endif
+ }
+ if (hostIsNew && (ifp->if_flags & IFF_MULTICAST)) {
int error_local = 0;
/*
@@ -772,14 +810,6 @@ in6_control(so, cmd, data, ifp, p)
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*/
@@ -806,8 +836,15 @@ in6_control(so, cmd, data, ifp, p)
case IFT_ARCNET:
case IFT_ETHER:
case IFT_FDDI:
- ia->ia6_flags |= IN6_IFF_TENTATIVE;
- nd6_dad_start((struct ifaddr *)ia, NULL);
+#if 0
+ case IFT_ATM:
+ case IFT_SLIP:
+ case IFT_PPP:
+#endif
+ {
+ ia->ia6_flags |= IN6_IFF_TENTATIVE;
+ nd6_dad_start((struct ifaddr *)ia, NULL);
+ }
break;
#ifdef IFT_DUMMY
case IFT_DUMMY:
@@ -833,64 +870,103 @@ in6_control(so, cmd, data, ifp, p)
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));
+ in6_purgeaddr(&ia->ia_ifa, ifp);
break;
default:
- if (ifp == 0 || ifp->if_ioctl == 0)
+ if (ifp == NULL || ifp->if_ioctl == 0)
return(EOPNOTSUPP);
return((*ifp->if_ioctl)(ifp, cmd, data));
}
return(0);
}
+void
+in6_purgeaddr(ifa, ifp)
+ struct ifaddr *ifa;
+ struct ifnet *ifp;
+{
+ struct in6_ifaddr *oia, *ia = (void *) ifa;
+ int plen;
+
+ 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);
+ }
+
+ TAILQ_REMOVE(&ifp->if_addrlist, &ia->ia_ifa, ifa_list);
+ /* release a refcnt for the link from if_addrlist */
+ 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");
+ }
+ {
+ int iilen;
+
+ plen = in6_mask2len(&oia->ia_prefixmask.sin6_addr);
+ iilen = (sizeof(oia->ia_prefixmask.sin6_addr) << 3) - plen;
+ in6_prefix_remove_ifid(iilen, oia);
+ }
+
+ /*
+ * Check if we have another address that has the same prefix of
+ * the purged address. If we have one, reinstall the corresponding
+ * interface route.
+ */
+ for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
+ int e;
+
+ if (in6_are_prefix_equal(&ia->ia_addr.sin6_addr,
+ &oia->ia_addr.sin6_addr, plen)) {
+ if ((e = rtinit(&(ia->ia_ifa), (int)RTM_ADD,
+ ia->ia_flags)) == 0) {
+ ia->ia_flags |= IFA_ROUTE;
+ break;
+ }
+ else {
+ log(LOG_NOTICE,
+ "in6_purgeaddr: failed to add an interface"
+ " route for %s/%d on %s, errno = %d\n",
+ ip6_sprintf(&ia->ia_addr.sin6_addr),
+ plen, if_name(ia->ia_ifp), e);
+ /* still trying */
+ }
+ }
+ }
+
+ /* release another refcnt for the link from in6_ifaddr */
+ IFAFREE(&oia->ia_ifa);
+}
+
/*
* 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.
@@ -921,6 +997,7 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
{
struct if_laddrreq *iflr = (struct if_laddrreq *)data;
struct ifaddr *ifa;
+ struct sockaddr *sa;
/* sanity checks */
if (!data || !ifp) {
@@ -937,20 +1014,25 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
case SIOCALIFADDR:
case SIOCDLIFADDR:
/* address must be specified on ADD and DELETE */
- if (iflr->addr.ss_family != AF_INET6)
+ sa = (struct sockaddr *)&iflr->addr;
+ if (sa->sa_family != AF_INET6)
return EINVAL;
- if (iflr->addr.ss_len != sizeof(struct sockaddr_in6))
+ if (sa->sa_len != sizeof(struct sockaddr_in6))
return EINVAL;
/* XXX need improvement */
- if (iflr->dstaddr.ss_family
- && iflr->dstaddr.ss_family != AF_INET6)
+ sa = (struct sockaddr *)&iflr->dstaddr;
+ if (sa->sa_family && sa->sa_family != AF_INET6)
return EINVAL;
- if (iflr->dstaddr.ss_family
- && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in6))
+ if (sa->sa_len && sa->sa_len != sizeof(struct sockaddr_in6))
return EINVAL;
break;
default: /*shouldn't happen*/
+#if 0
+ panic("invalid cmd to in6_lifaddr_ioctl");
+ /*NOTREACHED*/
+#else
return EOPNOTSUPP;
+#endif
}
if (sizeof(struct in6_addr) * 8 < iflr->prefixlen)
return EINVAL;
@@ -970,7 +1052,7 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
* address. hostid points to the first link-local
* address attached to the interface.
*/
- ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp);
+ ifa = (struct ifaddr *)in6ifa_ifpforlinklocal(ifp, 0);
if (!ifa)
return EADDRNOTAVAIL;
hostid = IFA_IN6(ifa);
@@ -994,7 +1076,8 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
bcopy(iflr->iflr_name, ifra.ifra_name,
sizeof(ifra.ifra_name));
- bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len);
+ bcopy(&iflr->addr, &ifra.ifra_addr,
+ ((struct sockaddr *)&iflr->addr)->sa_len);
if (hostid) {
/* fill in hostid part */
ifra.ifra_addr.sin6_addr.s6_addr32[2] =
@@ -1003,9 +1086,9 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
hostid->s6_addr32[3];
}
- if (iflr->dstaddr.ss_family) { /*XXX*/
+ if (((struct sockaddr *)&iflr->dstaddr)->sa_family) { /*XXX*/
bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr,
- iflr->dstaddr.ss_len);
+ ((struct sockaddr *)&iflr->dstaddr)->sa_len);
if (hostid) {
ifra.ifra_dstaddr.sin6_addr.s6_addr32[2] =
hostid->s6_addr32[2];
@@ -1107,6 +1190,9 @@ in6_lifaddr_ioctl(so, cmd, data, ifp, p)
if ((ifp->if_flags & IFF_POINTOPOINT) != 0) {
bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr,
ia->ia_dstaddr.sin6_len);
+ } else {
+ bzero(&ifra.ifra_dstaddr,
+ sizeof(ifra.ifra_dstaddr));
}
bcopy(&ia->ia_prefixmask, &ifra.ifra_dstaddr,
ia->ia_prefixmask.sin6_len);
@@ -1206,6 +1292,9 @@ in6_ifinit(ifp, ia, sin6, scrub)
}
if ((error = rtinit(&(ia->ia_ifa), (int)RTM_ADD, flags)) == 0)
ia->ia_flags |= IFA_ROUTE;
+ /* XXX check if the subnet route points to the same interface */
+ if (error == EEXIST)
+ error = 0;
/* Add ownaddr as loopback rtentry, if necessary(ex. on p2p link). */
in6_ifaddloop(&(ia->ia_ifa));
@@ -1305,8 +1394,9 @@ in6_delmulti(in6m)
* Find an IPv6 interface link-local address specific to an interface.
*/
struct in6_ifaddr *
-in6ifa_ifpforlinklocal(ifp)
+in6ifa_ifpforlinklocal(ifp, ignoreflags)
struct ifnet *ifp;
+ int ignoreflags;
{
register struct ifaddr *ifa;
@@ -1316,8 +1406,12 @@ in6ifa_ifpforlinklocal(ifp)
continue; /* just for safety */
if (ifa->ifa_addr->sa_family != AF_INET6)
continue;
- if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa)))
+ if (IN6_IS_ADDR_LINKLOCAL(IFA_IN6(ifa))) {
+ if ((((struct in6_ifaddr *)ifa)->ia6_flags &
+ ignoreflags) != 0)
+ continue;
break;
+ }
}
return((struct in6_ifaddr *)ifa);
@@ -1419,69 +1513,9 @@ in6_localaddr(in6)
}
/*
- * 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;
@@ -1502,6 +1536,7 @@ 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;
@@ -1555,114 +1590,241 @@ in6_prefixlen2mask(maskp, len)
/*
* return the best address out of the same scope
*/
-
struct in6_ifaddr *
-in6_ifawithscope(ifp, dst)
- register struct ifnet *ifp;
+in6_ifawithscope(oifp, dst)
+ register struct ifnet *oifp;
register struct in6_addr *dst;
{
- int dst_scope = in6_addrscope(dst), blen = -1, tlen;
+ int dst_scope = in6_addrscope(dst), src_scope, best_scope = 0;
+ int blen = -1;
struct ifaddr *ifa;
- struct in6_ifaddr *besta = NULL, *ia;
- struct in6_ifaddr *dep[3]; /*last-resort: deprecated*/
-
- dep[0] = dep[1] = dep[2] = NULL;
+ struct ifnet *ifp;
+ struct in6_ifaddr *ifa_best = NULL;
+
+ if (oifp == NULL) {
+ printf("in6_ifawithscope: output interface is not specified\n");
+ return(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.
+ * We search for all addresses on all interfaces from the beginning.
+ * Comparing an interface with the outgoing interface will be done
+ * only at the final stage of tiebreaking.
*/
- TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
+ for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
{
- 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;
+ /*
+ * We can never take an address that breaks the scope zone
+ * of the destination.
+ */
+ if (in6_addr2scopeid(ifp, dst) != in6_addr2scopeid(oifp, dst))
continue;
- }
- if (dst_scope == in6_addrscope(IFA_IN6(ifa))) {
+ TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
+ {
+ int tlen = -1, dscopecmp, bscopecmp, matchcmp;
+
+ if (ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+
+ src_scope = in6_addrscope(IFA_IN6(ifa));
+
/*
- * call in6_matchlen() as few as possible
+ * Don't use an address before completing DAD
+ * nor a duplicated address.
*/
- 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;
+ if (((struct in6_ifaddr *)ifa)->ia6_flags &
+ IN6_IFF_NOTREADY)
+ continue;
- 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;
- }
+ /* XXX: is there any case to allow anycasts? */
+ if (((struct in6_ifaddr *)ifa)->ia6_flags &
+ IN6_IFF_ANYCAST)
+ continue;
- for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
- if (IPV6_ADDR_SCOPE_SITELOCAL !=
- 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[2] = (struct in6_ifaddr *)ifa;
- continue;
+ if (((struct in6_ifaddr *)ifa)->ia6_flags &
+ IN6_IFF_DETACHED)
+ continue;
+
+ /*
+ * If this is the first address we find,
+ * keep it anyway.
+ */
+ if (ifa_best == NULL)
+ goto replace;
+
+ /*
+ * ifa_best is never NULL beyond this line except
+ * within the block labeled "replace".
+ */
+
+ /*
+ * If ifa_best has a smaller scope than dst and
+ * the current address has a larger one than
+ * (or equal to) dst, always replace ifa_best.
+ * Also, if the current address has a smaller scope
+ * than dst, ignore it unless ifa_best also has a
+ * smaller scope.
+ */
+ if (IN6_ARE_SCOPE_CMP(best_scope, dst_scope) < 0 &&
+ IN6_ARE_SCOPE_CMP(src_scope, dst_scope) >= 0)
+ goto replace;
+ if (IN6_ARE_SCOPE_CMP(src_scope, dst_scope) < 0 &&
+ IN6_ARE_SCOPE_CMP(best_scope, dst_scope) >= 0)
+ continue;
+
+ /*
+ * A deprecated address SHOULD NOT be used in new
+ * communications if an alternate (non-deprecated)
+ * address is available and has sufficient scope.
+ * RFC 2462, Section 5.5.4.
+ */
+ if (((struct in6_ifaddr *)ifa)->ia6_flags &
+ IN6_IFF_DEPRECATED) {
+ /*
+ * Ignore any deprecated addresses if
+ * specified by configuration.
+ */
+ if (!ip6_use_deprecated)
+ continue;
+
+ /*
+ * If we have already found a non-deprecated
+ * candidate, just ignore deprecated addresses.
+ */
+ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED)
+ == 0)
+ continue;
+ }
+
+ /*
+ * A non-deprecated address is always preferred
+ * to a deprecated one regardless of scopes and
+ * address matching.
+ */
+ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) &&
+ (((struct in6_ifaddr *)ifa)->ia6_flags &
+ IN6_IFF_DEPRECATED) == 0)
+ goto replace;
+
+ /*
+ * At this point, we have two cases:
+ * 1. we are looking at a non-deprecated address,
+ * and ifa_best is also non-deprecated.
+ * 2. we are looking at a deprecated address,
+ * and ifa_best is also deprecated.
+ * Also, we do not have to consider a case where
+ * the scope of if_best is larger(smaller) than dst and
+ * the scope of the current address is smaller(larger)
+ * than dst. Such a case has already been covered.
+ * Tiebreaking is done according to the following
+ * items:
+ * - the scope comparison between the address and
+ * dst (dscopecmp)
+ * - the scope comparison between the address and
+ * ifa_best (bscopecmp)
+ * - if the address match dst longer than ifa_best
+ * (matchcmp)
+ * - if the address is on the outgoing I/F (outI/F)
+ *
+ * Roughly speaking, the selection policy is
+ * - the most important item is scope. The same scope
+ * is best. Then search for a larger scope.
+ * 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.
+ * - If there is no other reasons to choose one,
+ * addresses on the outgoing I/F are preferred.
+ *
+ * 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 = 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) */
+ goto replace;
+ continue; /* (2) */
+ }
+ if (dscopecmp > 0) {
+ if (bscopecmp > 0) /* (3) */
+ continue;
+ goto replace; /* (4) */
+ }
+ if (dscopecmp < 0) {
+ if (bscopecmp > 0) /* (5) */
+ goto replace;
+ continue; /* (6) */
+ }
+
+ /* 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) */
+
+ replace:
+ ifa_best = (struct in6_ifaddr *)ifa;
+ blen = tlen >= 0 ? tlen :
+ in6_matchlen(IFA_IN6(ifa), dst);
+ best_scope = in6_addrscope(&ifa_best->ia_addr.sin6_addr);
}
- return ia;
}
- /* use the last-resort values, that are, deprecated addresses */
- if (dep[0])
- return dep[0];
- if (dep[1])
- return dep[1];
- if (dep[2])
- return dep[2];
+ /* count statistics for future improvements */
+ if (ifa_best == NULL)
+ ip6stat.ip6s_sources_none++;
+ else {
+ if (oifp == ifa_best->ia_ifp)
+ ip6stat.ip6s_sources_sameif[best_scope]++;
+ else
+ ip6stat.ip6s_sources_otherif[best_scope]++;
+
+ if (best_scope == dst_scope)
+ ip6stat.ip6s_sources_samescope[best_scope]++;
+ else
+ ip6stat.ip6s_sources_otherscope[best_scope]++;
+
+ if ((ifa_best->ia6_flags & IN6_IFF_DEPRECATED) != 0)
+ ip6stat.ip6s_sources_deprecated[best_scope]++;
+ }
- return NULL;
+ return(ifa_best);
}
/*
* 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;
@@ -1753,61 +1915,13 @@ in6_if_up(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;
-
- 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)
- 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;
- }
+ /*
+ * special cases, like 6to4, are handled in in6_ifattach
+ */
+ in6_ifattach(ifp, NULL);
-dad:
dad_delay = 0;
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
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