[src/netbsd-1-6]: src/sys/netinet6 Pull up revision 1.50 (requested by itojun...

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

details:   https://anonhg.NetBSD.org/src/rev/a1ace35cef5c
branches:  netbsd-1-6
changeset: 529420:a1ace35cef5c
user:      he <he%NetBSD.org@localhost>
date:      Thu Nov 21 17:53:47 2002 +0000

description:
Pull up revision 1.50 (requested by itojun in ticket #708):
  Allow bind() of deprecated addresses, trusting userland
  application knows what it's doing.

diffstat:

 sys/netinet6/in6_pcb.c |  16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diffs (41 lines):

diff -r f4b76f33bdf2 -r a1ace35cef5c sys/netinet6/in6_pcb.c
--- a/sys/netinet6/in6_pcb.c    Thu Nov 21 17:48:00 2002 +0000
+++ b/sys/netinet6/in6_pcb.c    Thu Nov 21 17:53:47 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: in6_pcb.c,v 1.46.6.1 2002/08/27 09:33:35 lukem Exp $   */
+/*     $NetBSD: in6_pcb.c,v 1.46.6.2 2002/11/21 17:53:47 he Exp $      */
 /*     $KAME: in6_pcb.c,v 1.84 2001/02/08 18:02:08 itojun Exp $        */
 
 /*
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.46.6.1 2002/08/27 09:33:35 lukem Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in6_pcb.c,v 1.46.6.2 2002/11/21 17:53:47 he Exp $");
 
 #include "opt_ipsec.h"
 
@@ -228,13 +228,19 @@
                         * bind to an anycast address might accidentally
                         * cause sending a packet with an anycast source
                         * address, so we forbid it.
+                        *
+                        * We should allow to bind to a deprecated address,
+                        * since the application dare to use it.
+                        * But, can we assume that they are careful enough
+                        * to check if the address is deprecated or not?
+                        * Maybe, as a safeguard, we should have a setsockopt
+                        * flag to control the bind(2) behavior against
+                        * deprecated addresses (default: forbid bind(2)).
                         */
                        if (ia &&
                            ((struct in6_ifaddr *)ia)->ia6_flags &
-                           (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|
-                            IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) {
+                           (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED))
                                return(EADDRNOTAVAIL);
-                       }
                }
                if (lport) {
 #ifndef IPNOPRIVPORTS