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| author | Gilad Ben-Yossef <gilad@codefidence.com> | 2009-10-28 04:15:26 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-29 01:28:47 -0700 |
| commit | 345cda2fd695534be5a4494f1b59da9daed33663 (patch) | |
| tree | 6e4b83512481d25b8e7976a1556c5d848e84a621 /net/ipv4 | |
| parent | cda42ebd67ee5fdf09d7057b5a4584d36fe8a335 (diff) | |
| download | kernel-common-345cda2fd695534be5a4494f1b59da9daed33663.tar.gz kernel-common-345cda2fd695534be5a4494f1b59da9daed33663.tar.bz2 kernel-common-345cda2fd695534be5a4494f1b59da9daed33663.zip | |
Allow to turn off TCP window scale opt per route
Add and use no window scale bit in the features field.
Note that this is not the same as setting a window scale of 0
as would happen with window limit on route.
Signed-off-by: Gilad Ben-Yossef <gilad@codefidence.com>
Sigend-off-by: Ori Finkelman <ori@comsleep.com>
Sigend-off-by: Yony Amit <yony@comsleep.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp_input.c | 3 | ||||
| -rw-r--r-- | net/ipv4/tcp_output.c | 6 |
2 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 6097491aa9fc..393c56921dcb 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3739,7 +3739,8 @@ void tcp_parse_options(struct sk_buff *skb, struct tcp_options_received *opt_rx, break; case TCPOPT_WINDOW: if (opsize == TCPOLEN_WINDOW && th->syn && - !estab && sysctl_tcp_window_scaling) { + !estab && sysctl_tcp_window_scaling && + !dst_feature(dst, RTAX_FEATURE_NO_WSCALE)) { __u8 snd_wscale = *(__u8 *)ptr; opt_rx->wscale_ok = 1; if (snd_wscale > 14) { diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 8819eba8ebb8..616c686ca253 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -496,7 +496,8 @@ static unsigned tcp_syn_options(struct sock *sk, struct sk_buff *skb, opts->tsecr = tp->rx_opt.ts_recent; size += TCPOLEN_TSTAMP_ALIGNED; } - if (likely(sysctl_tcp_window_scaling)) { + if (likely(sysctl_tcp_window_scaling && + !dst_feature(dst, RTAX_FEATURE_NO_WSCALE))) { opts->ws = tp->rx_opt.rcv_wscale; opts->options |= OPTION_WSCALE; size += TCPOLEN_WSCALE_ALIGNED; @@ -2347,7 +2348,8 @@ static void tcp_connect_init(struct sock *sk) tp->advmss - (tp->rx_opt.ts_recent_stamp ? tp->tcp_header_len - sizeof(struct tcphdr) : 0), &tp->rcv_wnd, &tp->window_clamp, - sysctl_tcp_window_scaling, + (sysctl_tcp_window_scaling && + !dst_feature(dst, RTAX_FEATURE_NO_WSCALE)), &rcv_wscale); tp->rx_opt.rcv_wscale = rcv_wscale; |