Commit ce865a61 authored by Gerrit Renker's avatar Gerrit Renker Committed by David S. Miller

[DCCP]: Add support for abortive release

This continues from the previous patch and adds support for actively aborting
a DCCP connection, using a Reset Code 2, "Aborted" to inform the peer of an
abortive release.

I have tried this in various client/server settings and it works as expected.
Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: default avatarIan McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d83bd95b
......@@ -276,6 +276,12 @@ static inline int dccp_listen_start(struct sock *sk, int backlog)
return inet_csk_listen_start(sk, backlog);
}
static inline int dccp_need_reset(int state)
{
return state != DCCP_CLOSED && state != DCCP_LISTEN &&
state != DCCP_REQUESTING;
}
int dccp_disconnect(struct sock *sk, int flags)
{
struct inet_connection_sock *icsk = inet_csk(sk);
......@@ -286,10 +292,15 @@ int dccp_disconnect(struct sock *sk, int flags)
if (old_state != DCCP_CLOSED)
dccp_set_state(sk, DCCP_CLOSED);
/* ABORT function of RFC793 */
/*
* This corresponds to the ABORT function of RFC793, sec. 3.8
* TCP uses a RST segment, DCCP a Reset packet with Code 2, "Aborted".
*/
if (old_state == DCCP_LISTEN) {
inet_csk_listen_stop(sk);
/* FIXME: do the active reset thing */
} else if (dccp_need_reset(old_state)) {
dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED);
sk->sk_err = ECONNRESET;
} else if (old_state == DCCP_REQUESTING)
sk->sk_err = ECONNRESET;
......
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