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TCPCT part 1a: add request_values parameter for sending SYNACK

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Add optional function parameters associated with sending SYNACK.
These parameters are not needed after sending SYNACK, and are not
used for retransmission.  Avoids extending struct tcp_request_sock,
and avoids allocating kernel memory.

Also affects DCCP as it uses common struct request_sock_ops,
but this parameter is currently reserved for future use.

Signed-off-by: [email protected]
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
William Allen Simpson 2009-12-02 18:07:39 +00:00 • committed by David S. Miller
commit e6b4d11367
10 changed files with 42 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

5
net/dccp/ipv4.c
View file

@ -477,7 +477,8 @@ static struct dst_entry* dccp_v4_route_skb(struct net *net, struct sock *sk,
return &rt->u.dst;
}
static int dccp_v4_send_response(struct sock *sk, struct request_sock *req)
static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
struct request_values *rv_unused)
{
int err = -1;
struct sk_buff *skb;
@ -626,7 +627,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
dreq->dreq_iss = dccp_v4_init_sequence(skb);
dreq->dreq_service = service;
if (dccp_v4_send_response(sk, req))
if (dccp_v4_send_response(sk, req, NULL))
goto drop_and_free;
inet_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);

5
net/dccp/ipv6.c
View file

@ -241,7 +241,8 @@ out:
}
static int dccp_v6_send_response(struct sock *sk, struct request_sock *req)
static int dccp_v6_send_response(struct sock *sk, struct request_sock *req,
struct request_values *rv_unused)
{
struct inet6_request_sock *ireq6 = inet6_rsk(req);
struct ipv6_pinfo *np = inet6_sk(sk);
@ -468,7 +469,7 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
dreq->dreq_iss = dccp_v6_init_sequence(skb);
dreq->dreq_service = service;
if (dccp_v6_send_response(sk, req))
if (dccp_v6_send_response(sk, req, NULL))
goto drop_and_free;
inet6_csk_reqsk_queue_hash_add(sk, req, DCCP_TIMEOUT_INIT);

2
net/dccp/minisocks.c
View file

@ -184,7 +184,7 @@ struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
* counter (backoff, monitored by dccp_response_timer).
*/
req->retrans++;
req->rsk_ops->rtx_syn_ack(sk, req);
req->rsk_ops->rtx_syn_ack(sk, req, NULL);
}
/* Network Duplicate, discard packet */
return NULL;