diff options
| author |   Florian Westphal <fw@strlen.de> | 2010-06-13 11:29:39 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2010-06-15 18:10:29 -0700 |
| commit | 2bbdf389a9432270147c8e8e35b021ad61772f65 (patch) | |
| tree | 0c91db74045feaa62a7c11a7757052adcff2c3f6 /net | |
| parent | net: Fix error in comment on net_device_ops::ndo_get_stats (diff) | |
| download | linux-dev-2bbdf389a9432270147c8e8e35b021ad61772f65.tar.xz linux-dev-2bbdf389a9432270147c8e8e35b021ad61772f65.zip | |
ipv6: syncookies: do not skip ->iif initialization
When syncookies are in effect, req->iif is left uninitialized.
In case of e.g. link-local addresses the route lookup then fails
and no syn-ack is sent.
Rearrange things so ->iif is also initialized in the syncookie case.
want_cookie can only be true when the isn was zero, thus move the want_cookie
check into the "!isn" branch.
Cc: Glenn Griffin <ggriffin.kernel@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 5887141ad641..f87534569366 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1272,10 +1272,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb) if (!want_cookie) TCP_ECN_create_request(req, tcp_hdr(skb)); - if (want_cookie) { - isn = cookie_v6_init_sequence(sk, skb, &req->mss); - req->cookie_ts = tmp_opt.tstamp_ok; - } else if (!isn) { + if (!isn) { if (ipv6_opt_accepted(sk, skb) || np->rxopt.bits.rxinfo || np->rxopt.bits.rxoinfo || np->rxopt.bits.rxhlim || np->rxopt.bits.rxohlim) { @@ -1288,8 +1285,12 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb) if (!sk->sk_bound_dev_if && ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL) treq->iif = inet6_iif(skb); - - isn = tcp_v6_init_sequence(skb); + if (!want_cookie) { + isn = tcp_v6_init_sequence(skb); + } else { + isn = cookie_v6_init_sequence(sk, skb, &req->mss); + req->cookie_ts = tmp_opt.tstamp_ok; + } } tcp_rsk(req)->snt_isn = isn; |