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lib: Add support for IPv6 ttl security

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* sockunion.c: (sockopt_minttl) Add IPv6 support for min hop count.
  The kernel support is Linux kernel 2.6.35 or later.
This commit is contained in:
Stephen Hemminger 2010-08-05 10:26:27 -07:00 committed by Paul Jakma
parent 89b6d1f8e2
commit d876bdf4a8
1 changed files with 19 additions and 11 deletions
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30
lib/sockunion.c
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@ -541,22 +541,30 @@ int
sockopt_minttl (int family, int sock, int minttl)
{
#ifdef IP_MINTTL
int ret;
ret = setsockopt (sock, IPPROTO_IP, IP_MINTTL, &minttl, sizeof(minttl));
if (ret < 0)
if (family == AF_INET)
{
zlog (NULL, LOG_WARNING,
"can't set sockopt IP_MINTTL to %d on socket %d: %s",
minttl, sock, safe_strerror (errno));
return -1;
int ret = setsockopt (sock, IPPROTO_IP, IP_MINTTL, &minttl, sizeof(minttl));
if (ret < 0)
zlog (NULL, LOG_WARNING,
"can't set sockopt IP_MINTTL to %d on socket %d: %s",
minttl, sock, safe_strerror (errno));
return ret;
}
#endif /* IP_MINTTL */
#ifdef IPV6_MINHOPCNT
if (family == AF_INET6)
{
int ret = setsockopt (sock, IPPROTO_IPV6, IPV6_MINHOPCNT, &minttl, sizeof(minttl));
if (ret < 0)
zlog (NULL, LOG_WARNING,
"can't set sockopt IPV6_MINHOPCNT to %d on socket %d: %s",
minttl, sock, safe_strerror (errno));
return ret;
}
#endif
return 0;
#else
errno = EOPNOTSUPP;
return -1;
#endif /* IP_MINTTL */
}
/* If same family and same prefix return 1. */