diff options
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 33 |
1 files changed, 1 insertions, 32 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 715965f0fac0..dd4ddb30a3a9 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -844,43 +844,12 @@ static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb) struct tcp_md5sig_key *hash_expected; struct ipv6hdr *ip6h = ipv6_hdr(skb); struct tcphdr *th = tcp_hdr(skb); - int length = (th->doff << 2) - sizeof (*th); int genhash; - u8 *ptr; u8 newhash[16]; hash_expected = tcp_v6_md5_do_lookup(sk, &ip6h->saddr); + hash_location = tcp_parse_md5sig_option(th); - /* If the TCP option is too short, we can short cut */ - if (length < TCPOLEN_MD5SIG) - return hash_expected ? 1 : 0; - - /* parse options */ - ptr = (u8*)(th + 1); - while (length > 0) { - int opcode = *ptr++; - int opsize; - - switch(opcode) { - case TCPOPT_EOL: - goto done_opts; - case TCPOPT_NOP: - length--; - continue; - default: - opsize = *ptr++; - if (opsize < 2 || opsize > length) - goto done_opts; - if (opcode == TCPOPT_MD5SIG) { - hash_location = ptr; - goto done_opts; - } - } - ptr += opsize - 2; - length -= opsize; - } - -done_opts: /* do we have a hash as expected? */ if (!hash_expected) { if (!hash_location) |