Commit 08831700 authored Sep 26, 2007 by Gerrit Renker Committed by David S. Miller Oct 10, 2007

[DCCP]: Send Reset upon Sync in state REQUEST



This fixes the code to correspond to RFC 4340, 7.5.4, which states the
exception that a Sync received in state REQUEST generates a Reset (not
a SyncAck).

To achieve this, only a small change is required. Since
dccp_rcv_request_sent_state_process() already uses the correct Reset Code
number 4 ("Packet Error"), we only need to shift the if-statement a few
lines further down.

(To test this case: replace DCCP_PKT_RESPONSE with DCCP_PKT_SYNC
                    in dccp_make_response.)

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>

parent 53465eb4

net/dccp/input.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -540,11 +540,6 @@ int dccp_rcv_state_process(struct sock sk, struct sk_buff skb,
		return 0;
		}

		if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
		dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
		goto discard;
		}

		switch (sk->sk_state) {
		case DCCP_CLOSED:
		dcb->dccpd_reset_code = DCCP_RESET_CODE_NO_CONNECTION;
		@@ -575,6 +570,9 @@ int dccp_rcv_state_process(struct sock sk, struct sk_buff skb,
		sk_wake_async(sk, 0, POLL_OUT);
		break;
		}
		} else if (unlikely(dh->dccph_type == DCCP_PKT_SYNC)) {
		dccp_send_sync(sk, dcb->dccpd_seq, DCCP_PKT_SYNCACK);
		goto discard;
		}

		if (!queued) {