[src/trunk]: src/sys/netinet PR/15662: Sean Boudreau: make sure we clean all ...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/47fb1e4aa373
branches:  trunk
changeset: 522575:47fb1e4aa373
user:      christos <christos%NetBSD.org@localhost>
date:      Thu Feb 21 21:59:16 2002 +0000

description:
PR/15662: Sean Boudreau: make sure we clean all routes of an interface when
we change its ip address.

diffstat:

 sys/netinet/in.c |  32 ++++++++++++++++++++++++++++++--
 1 files changed, 30 insertions(+), 2 deletions(-)

diffs (80 lines):

diff -r 89d4ad1859bb -r 47fb1e4aa373 sys/netinet/in.c
--- a/sys/netinet/in.c  Thu Feb 21 21:58:00 2002 +0000
+++ b/sys/netinet/in.c  Thu Feb 21 21:59:16 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: in.c,v 1.71 2001/11/13 00:32:35 lukem Exp $    */
+/*     $NetBSD: in.c,v 1.72 2002/02/21 21:59:16 christos Exp $ */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -102,7 +102,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in.c,v 1.71 2001/11/13 00:32:35 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in.c,v 1.72 2002/02/21 21:59:16 christos Exp $");
 
 #include "opt_inet.h"
 #include "opt_inet_conf.h"
@@ -116,6 +116,7 @@
 #include <sys/socketvar.h>
 #include <sys/systm.h>
 #include <sys/proc.h>
+#include <sys/syslog.h>
 
 #include <net/if.h>
 #include <net/route.h>
@@ -135,6 +136,7 @@
 static void in_len2mask __P((struct in_addr *, int));
 static int in_lifaddr_ioctl __P((struct socket *, u_long, caddr_t,
        struct ifnet *, struct proc *));
+static int in_rt_walktree __P((struct radix_node *, void *));
 
 static int in_addprefix __P((struct in_ifaddr *, int));
 static int in_scrubprefix __P((struct in_ifaddr *));
@@ -539,12 +541,34 @@
        return (0);
 }
 
+static int
+in_rt_walktree(rn, v)
+       struct radix_node *rn;
+       void *v;
+{
+       struct in_ifaddr *ia = (struct in_ifaddr *)v;
+       struct rtentry *rt = (struct rtentry *)rn;
+       int error;
+
+       if (rt->rt_ifa == &ia->ia_ifa) {
+               if ((error = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
+                   rt_mask(rt), rt->rt_flags, NULL)) != 0) {
+                       log(LOG_WARNING, "ifa_rt_walktree: unable to delete "
+                           "rtentry. error= %d", error);
+               } else {
+                       IFAFREE(&ia->ia_ifa);
+               }
+       }
+       return 0;
+}
+
 void
 in_purgeaddr(ifa, ifp)
        struct ifaddr *ifa;
        struct ifnet *ifp;
 {
        struct in_ifaddr *ia = (void *) ifa;
+       struct radix_node_head *rnh;
 
        in_ifscrub(ifp, ia);
        LIST_REMOVE(ia, ia_hash);
@@ -561,6 +585,10 @@
            ifp->if_output != if_nulloutput)
                in_savemkludge(ia);
        IFAFREE(&ia->ia_ifa);
+
+       if ((rnh = rt_tables[AF_INET]) != NULL)
+               (*rnh->rnh_walktree)(rnh, in_rt_walktree, ifa);
+
        in_setmaxmtu();
 }