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Don't try to bind to an anycast addeess. The KAME IPv6 stack doesn't

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allow bind to an anycast addeess.  It does away with an annoying
message.

Reviewed by:	bz, roberto
MFC after:	2 weeks
This commit is contained in:
Hajimu UMEMOTO 2009-12-01 16:07:50 +00:00
parent 3ee7e0d48e
commit 0fa2c497a6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=199995
1 changed files with 41 additions and 0 deletions
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41
contrib/ntp/ntpd/ntp_io.c
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@ -65,6 +65,12 @@
#endif /* IPV6 Multicast Support */
#endif /* IPv6 Support */
#ifdef INCLUDE_IPV6_SUPPORT
#include <netinet/in.h>
#include <net/if_var.h>
#include <netinet/in_var.h>
#endif /* !INCLUDE_IPV6_SUPPORT */
extern int listen_to_virtual_ips;
extern const char *specific_interface;
@ -1137,6 +1143,36 @@ set_wildcard_reuse(int family, int on)
}
#endif /* OS_NEEDS_REUSEADDR_FOR_IFADDRBIND */
#ifdef INCLUDE_IPV6_SUPPORT
static isc_boolean_t
is_anycast(struct sockaddr *sa, char *name)
{
#if defined(SIOCGIFAFLAG_IN6) && defined(IN6_IFF_ANYCAST)
struct in6_ifreq ifr6;
int fd;
u_int32_t flags6;
if (sa->sa_family != AF_INET6)
return ISC_FALSE;
if ((fd = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
return ISC_FALSE;
memset(&ifr6, 0, sizeof(ifr6));
memcpy(&ifr6.ifr_addr, (struct sockaddr_in6 *)sa,
sizeof(struct sockaddr_in6));
strlcpy(ifr6.ifr_name, name, IF_NAMESIZE);
if (ioctl(fd, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
close(fd);
return ISC_FALSE;
}
close(fd);
flags6 = ifr6.ifr_ifru.ifru_flags6;
if ((flags6 & IN6_IFF_ANYCAST) != 0)
return ISC_TRUE;
#endif /* !SIOCGIFAFLAG_IN6 || !IN6_IFF_ANYCAST */
return ISC_FALSE;
}
#endif /* !INCLUDE_IPV6_SUPPORT */
/*
* update_interface strategy
*
@ -1276,6 +1312,11 @@ update_interfaces(
if (is_wildcard_addr(&interface.sin))
continue;
#ifdef INCLUDE_IPV6_SUPPORT
if (is_anycast((struct sockaddr *)&interface.sin, isc_if.name))
continue;
#endif /* !INCLUDE_IPV6_SUPPORT */
/*
* map to local *address* in order
* to map all duplicate interfaces to an interface structure