We don't and won't support this, so let's not even try.
ok?
Index: inetd.c
===================================================================
RCS file: /cvs/src/usr.sbin/inetd/inetd.c,v
retrieving revision 1.156
diff -u -p -r1.156 inetd.c
--- inetd.c 4 Oct 2017 19:52:26 -0000 1.156
+++ inetd.c 4 Oct 2017 19:58:48 -0000
@@ -444,7 +444,6 @@ dg_badinput(struct sockaddr *sa)
case AF_INET:
in.s_addr = ntohl(((struct sockaddr_in *)sa)->sin_addr.s_addr);
port = ntohs(((struct sockaddr_in *)sa)->sin_port);
- v4chk:
if (IN_MULTICAST(in.s_addr))
goto bad;
switch ((in.s_addr & 0xff000000) >> 24) {
@@ -460,16 +459,12 @@ dg_badinput(struct sockaddr *sa)
if (IN6_IS_ADDR_MULTICAST(in6) || IN6_IS_ADDR_UNSPECIFIED(in6))
goto bad;
/*
- * OpenBSD does not support IPv4 mapped address (RFC2553
- * inbound behavior) at all. We should drop it.
+ * OpenBSD does not support IPv4-mapped and
+ * IPv4-compatible IPv6 addresses (RFC2553). We should
+ * drop the packet.
*/
- if (IN6_IS_ADDR_V4MAPPED(in6))
+ if (IN6_IS_ADDR_V4MAPPED(in6) || IN6_IS_ADDR_V4COMPAT(in6))
goto bad;
- if (IN6_IS_ADDR_V4COMPAT(in6)) {
- memcpy(&in, &in6->s6_addr[12], sizeof(in));
- in.s_addr = ntohl(in.s_addr);
- goto v4chk;
- }
break;
default:
/* Unsupported AF */
--
jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
