netfilter: ipv6: only provide sk_bound_dev_if for link-local addr
yoshfuji points out that sk_bound_dev_if should only be provided for link-local addresses. IPv6 getpeer/sockname also has this test, i.e. we will now only set sin6_scope_id if the original(!) destination was a link-local address. Reported-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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@ -334,9 +334,14 @@ ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
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memcpy(&sin6.sin6_addr,
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&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.in6,
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sizeof(sin6.sin6_addr));
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sin6.sin6_scope_id = sk->sk_bound_dev_if;
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nf_ct_put(ct);
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if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
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sin6.sin6_scope_id = sk->sk_bound_dev_if;
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else
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sin6.sin6_scope_id = 0;
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return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0;
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}
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