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| author | Andrea Bittau <a.bittau@cs.ucl.ac.uk> | 2006-03-20 17:43:56 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-03-20 17:43:56 -0800 |
| commit | afe00251dd9b53d51de91ff0099961f42bbf3754 (patch) | |
| tree | a56aa987140662cf3e6e65be402b8591298c5ced /net/dccp/timer.c | |
| parent | 2a91aa3967398fb94eccc8da67c82bce9f67afdf (diff) | |
| download | lwn-afe00251dd9b53d51de91ff0099961f42bbf3754.tar.gz lwn-afe00251dd9b53d51de91ff0099961f42bbf3754.zip | |
[DCCP]: Initial feature negotiation implementation
Still needs more work, but boots and doesn't crashes, even
does some negotiation!
18:38:52.174934 127.0.0.1.43458 > 127.0.0.1.5001: request <change_l ack_ratio 2, change_r ccid 2, change_l ccid 2>
18:38:52.218526 127.0.0.1.5001 > 127.0.0.1.43458: response <nop, nop, change_l ack_ratio 2, confirm_r ccid 2 2, confirm_l ccid 2 2, confirm_r ack_ratio 2>
18:38:52.185398 127.0.0.1.43458 > 127.0.0.1.5001: <nop, confirm_r ack_ratio 2, ack_vector0 0x00, elapsed_time 212>
:-)
Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/timer.c')
| -rw-r--r-- | net/dccp/timer.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/dccp/timer.c b/net/dccp/timer.c index aa34b576e228..d7c786608ec6 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -141,6 +141,17 @@ static void dccp_retransmit_timer(struct sock *sk) { struct inet_connection_sock *icsk = inet_csk(sk); + /* retransmit timer is used for feature negotiation throughout + * connection. In this case, no packet is re-transmitted, but rather an + * ack is generated and pending changes are splaced into its options. + */ + if (sk->sk_send_head == NULL) { + dccp_pr_debug("feat negotiation retransmit timeout %p\n", sk); + if (sk->sk_state == DCCP_OPEN) + dccp_send_ack(sk); + goto backoff; + } + /* * sk->sk_send_head has to have one skb with * DCCP_SKB_CB(skb)->dccpd_type set to one of the retransmittable DCCP @@ -177,6 +188,7 @@ static void dccp_retransmit_timer(struct sock *sk) goto out; } +backoff: icsk->icsk_backoff++; icsk->icsk_retransmits++; |