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[DCCP]: Implement the CLOSING timer

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So that we retransmit CLOSE/CLOSEREQ packets till they elicit an
answer or we hit a timeout.

Most of the machinery uses TCP approaches, this code has to be
polished & audited, but this is better than we had before.

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
2005-08-23 21:50:06 -07:00
committed by David S. Miller
parent 58e45131dc
commit 7ad07e7cf3
4 changed files with 47 additions and 32 deletions
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26
net/dccp/input.c
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@@ -31,14 +31,9 @@ static void dccp_fin(struct sock *sk, struct sk_buff *skb)
static void dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
{
switch (sk->sk_state) {
case DCCP_PARTOPEN:
case DCCP_OPEN:
dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED);
dccp_fin(sk, skb);
dccp_set_state(sk, DCCP_CLOSED);
break;
}
dccp_v4_send_reset(sk, DCCP_RESET_CODE_CLOSED);
dccp_fin(sk, skb);
dccp_set_state(sk, DCCP_CLOSED);
}
static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
@@ -54,13 +49,8 @@ static void dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
return;
}
switch (sk->sk_state) {
case DCCP_PARTOPEN:
case DCCP_OPEN:
dccp_set_state(sk, DCCP_CLOSING);
dccp_send_close(sk);
break;
}
dccp_set_state(sk, DCCP_CLOSING);
dccp_send_close(sk, 0);
}
static inline void dccp_event_ack_recv(struct sock *sk, struct sk_buff *skb)
@@ -562,6 +552,12 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
dccp_send_sync(sk, DCCP_SKB_CB(skb)->dccpd_seq,
DCCP_PKT_SYNC);
goto discard;
} else if (dh->dccph_type == DCCP_PKT_CLOSEREQ) {
dccp_rcv_closereq(sk, skb);
goto discard;
} else if (dh->dccph_type == DCCP_PKT_CLOSE) {
dccp_rcv_close(sk, skb);
return 0;
}
switch (sk->sk_state) {