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[DCCP]: Fix RESET handling in dccp_rcv_state_process 

To avoid holding TIMEWAIT state for sockets in the LISTEN state.

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-08-13 20:36:01 -03:00 committed by David S. Miller
parent 725ba8eee3
commit 8649b0d416
1 changed files with 42 additions and 18 deletions
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60
net/dccp/input.c
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@ -402,7 +402,48 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
const int old_state = sk->sk_state;
int queued = 0;
if (sk->sk_state != DCCP_LISTEN && sk->sk_state != DCCP_REQUESTING) {
/*
* Step 3: Process LISTEN state
* (Continuing from dccp_v4_do_rcv and dccp_v6_do_rcv)
*
* If S.state == LISTEN,
* If P.type == Request or P contains a valid Init Cookie
* option,
* * Must scan the packet's options to check for an Init
* Cookie. Only the Init Cookie is processed here,
* however; other options are processed in Step 8. This
* scan need only be performed if the endpoint uses Init
* Cookies *
* * Generate a new socket and switch to that socket *
* Set S := new socket for this port pair
* S.state = RESPOND
* Choose S.ISS (initial seqno) or set from Init Cookie
* Set S.ISR, S.GSR, S.SWL, S.SWH from packet or Init Cookie
* Continue with S.state == RESPOND
* * A Response packet will be generated in Step 11 *
* Otherwise,
* Generate Reset(No Connection) unless P.type == Reset
* Drop packet and return
*
* NOTE: the check for the packet types is done in
* dccp_rcv_state_process
*/
if (sk->sk_state == DCCP_LISTEN) {
if (dh->dccph_type == DCCP_PKT_REQUEST) {
if (dccp_v4_conn_request(sk, skb) < 0)
return 1;
/* FIXME: do congestion control initialization */
goto discard;
}
if (dh->dccph_type == DCCP_PKT_RESET)
goto discard;
/* Caller (dccp_v4_do_rcv) will send Reset(No Connection)*/
return 1;
}
if (sk->sk_state != DCCP_REQUESTING) {
if (dccp_check_seqno(sk, skb))
goto discard;
@ -484,23 +525,6 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
case DCCP_CLOSED:
return 1;
case DCCP_LISTEN:
if (dh->dccph_type == DCCP_PKT_ACK ||
dh->dccph_type == DCCP_PKT_DATAACK)
return 1;
if (dh->dccph_type == DCCP_PKT_RESET)
goto discard;
if (dh->dccph_type == DCCP_PKT_REQUEST) {
if (dccp_v4_conn_request(sk, skb) < 0)
return 1;
/* FIXME: do congestion control initialization */
goto discard;
}
goto discard;
case DCCP_REQUESTING:
/* FIXME: do congestion control initialization */