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Screen out interfaces which have no address in foreach_localaddr(). (Per man
pages for OpenBSD and OS/X, they are legal.) If it doesn't have an address,
the functions which call this function (src/kdc/network.c, which wants to
listen on the interfaces, and src/lib/krb5/os/localaddr.c, which just wants a
list of local addresses), have no use for it anyway.
This is slightly different than the fix proposed by Paul Jakma at
http://mailman.mit.edu/pipermail/krb5-bugs/2004-January/002152.html, but is
more or less equivalent.
Don't worry, printifaddr() already checks that ifp->ifa_addr != NULL before
printing it.
--- krb5-1.4/src/lib/krb5/os/localaddr.c 2005-02-18 11:20:52.000000000 -0500
+++ krb5-1.4/src/lib/krb5/os/localaddr.c 2005-02-18 11:23:52.000000000 -0500
@@ -435,6 +435,8 @@
#ifdef DEBUG
printifaddr (ifp);
#endif
+ if (ifp->ifa_addr == NULL)
+ continue;
if ((ifp->ifa_flags & IFF_UP) == 0)
continue;
if (ifp->ifa_flags & IFF_LOOPBACK) {
@@ -458,6 +460,8 @@
/* If this address is a duplicate, punt. */
match = 0;
for (ifp2 = ifp_head; ifp2 && ifp2 != ifp; ifp2 = ifp2->ifa_next) {
+ if (ifp2->ifa_addr == NULL)
+ continue;
if ((ifp2->ifa_flags & IFF_UP) == 0)
continue;
if (ifp2->ifa_flags & IFF_LOOPBACK)
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