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Fix --add-subnet when returning empty or default subnet.

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This commit is contained in:
Simon Kelley
2016-02-28 17:07:10 +00:00
parent 7480aeffc8
commit 22fe2fd038
2 changed files with 22 additions and 17 deletions
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26
src/edns0.c
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@@ -281,8 +281,11 @@ static size_t calc_subnet_opt(struct subnet_opt *opt, union mysockaddr *source)
void *addrp;
int sa_family = source->sa.sa_family;
opt->source_netmask = 0;
opt->scope_netmask = 0;
#ifdef HAVE_IPV6
if (source->sa.sa_family == AF_INET6)
if (source->sa.sa_family == AF_INET6 && daemon->add_subnet6)
{
opt->source_netmask = daemon->add_subnet6->mask;
if (daemon->add_subnet6->addr_used)
@@ -293,8 +296,9 @@ static size_t calc_subnet_opt(struct subnet_opt *opt, union mysockaddr *source)
else
addrp = &source->in6.sin6_addr;
}
else
#endif
if (source->sa.sa_family == AF_INET && daemon->add_subnet4)
{
opt->source_netmask = daemon->add_subnet4->mask;
if (daemon->add_subnet4->addr_used)
@@ -302,26 +306,26 @@ static size_t calc_subnet_opt(struct subnet_opt *opt, union mysockaddr *source)
sa_family = daemon->add_subnet4->addr.sa.sa_family;
addrp = get_addrp(&daemon->add_subnet4->addr, sa_family);
}
else
addrp = &source->in.sin_addr;
else
addrp = &source->in.sin_addr;
}
opt->scope_netmask = 0;
#ifdef HAVE_IPV6
opt->family = htons(sa_family == AF_INET6 ? 2 : 1);
#else
opt->family = htons(1);
#endif
len = 0;
if (opt->source_netmask != 0)
{
#ifdef HAVE_IPV6
opt->family = htons(sa_family == AF_INET6 ? 2 : 1);
#else
opt->family = htons(1);
#endif
len = ((opt->source_netmask - 1) >> 3) + 1;
memcpy(opt->addr, addrp, len);
if (opt->source_netmask & 7)
opt->addr[len-1] &= 0xff << (8 - (opt->source_netmask & 7));
}
return len + 4;
}