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set IPV6_V6ONLY socket option for AF_INET6 socket, to avoid

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complicated access control issue due to IPv4 mapped address.
This commit is contained in:
itojun 2002-09-24 13:31:33 +00:00
parent 002a769a08
commit c41e40e20e
1 changed files with 9 additions and 2 deletions
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11
usr.sbin/lpr/lpd/lpd.c
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@ -1,4 +1,4 @@
/* $NetBSD: lpd.c,v 1.42 2002/09/20 04:12:42 lukem Exp $ */
/* $NetBSD: lpd.c,v 1.43 2002/09/24 13:31:33 itojun Exp $ */
/*
* Copyright (c) 1983, 1993, 1994
@ -45,7 +45,7 @@ __COPYRIGHT("@(#) Copyright (c) 1983, 1993, 1994\n\
#if 0
static char sccsid[] = "@(#)lpd.c 8.7 (Berkeley) 5/10/95";
#else
__RCSID("$NetBSD: lpd.c,v 1.42 2002/09/20 04:12:42 lukem Exp $");
__RCSID("$NetBSD: lpd.c,v 1.43 2002/09/24 13:31:33 itojun Exp $");
#endif
#endif /* not lint */
@ -788,6 +788,13 @@ socksetup(int af, int options, const char *port, int *nfds)
close(s);
continue;
}
if (r->ai_family == AF_INET6 && setsockopt(s,
IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) < 0) {
syslog(LOG_ERR,
"setsockopt (IPV6_V6ONLY): %m");
close(s);
continue;
}
if (bind(s, r->ai_addr, r->ai_addrlen) < 0) {
syslog(LOG_DEBUG, "bind(): %m");
close(s);