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tcp: md5: add an address prefix for key lookup

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This allows the keys used for TCP MD5 signature to be used for whole
range of addresses, specified with a prefix length, instead of only one
address as it currently is.

Signed-off-by: Bob Gilligan <gilligan@arista.com>
Signed-off-by: Eric Mowat <mowat@arista.com>
Signed-off-by: Ivan Delalande <colona@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Delalande 2017-06-15 18:07:06 -07:00 • committed by David S. Miller
parent 910603818c
commit 6797318e62
3 changed files with 70 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

12
net/ipv6/tcp_ipv6.c
View file

@ -533,9 +533,9 @@ static int tcp_v6_parse_md5_keys(struct sock *sk, char __user *optval,
if (!cmd.tcpm_keylen) {
if (ipv6_addr_v4mapped(&sin6->sin6_addr))
return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin6->sin6_addr.s6_addr32[3],
AF_INET);
AF_INET, 32);
return tcp_md5_do_del(sk, (union tcp_md5_addr *)&sin6->sin6_addr,
AF_INET6);
AF_INET6, 128);
}
if (cmd.tcpm_keylen > TCP_MD5SIG_MAXKEYLEN)
@ -543,10 +543,12 @@ static int tcp_v6_parse_md5_keys(struct sock *sk, char __user *optval,
if (ipv6_addr_v4mapped(&sin6->sin6_addr))
return tcp_md5_do_add(sk, (union tcp_md5_addr *)&sin6->sin6_addr.s6_addr32[3],
AF_INET, cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL);
AF_INET, 32, cmd.tcpm_key,
cmd.tcpm_keylen, GFP_KERNEL);
return tcp_md5_do_add(sk, (union tcp_md5_addr *)&sin6->sin6_addr,
AF_INET6, cmd.tcpm_key, cmd.tcpm_keylen, GFP_KERNEL);
AF_INET6, 128, cmd.tcpm_key, cmd.tcpm_keylen,
GFP_KERNEL);
}
static int tcp_v6_md5_hash_headers(struct tcp_md5sig_pool *hp,
@ -1186,7 +1188,7 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
* across. Shucks.
*/
tcp_md5_do_add(newsk, (union tcp_md5_addr *)&newsk->sk_v6_daddr,
AF_INET6, key->key, key->keylen,
AF_INET6, 128, key->key, key->keylen,
sk_gfp_mask(sk, GFP_ATOMIC));
}
#endif