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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-11-28 11:34:53 -0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:55:12 -0800 |
| commit | f11135a3442996d78dad99933bfdb90d1f6588d3 (patch) | |
| tree | 6b10cea26f0551b769097296b7e41f25d6b44f08 /net/dccp/proto.c | |
| parent | f53dc67c5e7babafe239b93a11678b0e05bead51 (diff) | |
| download | linux-f11135a3442996d78dad99933bfdb90d1f6588d3.tar.gz | |
[DCCP]: Dedicated auxiliary states to support passive-close
This adds two auxiliary states to deal with passive closes: * PASSIVE_CLOSE (reached from OPEN via reception of Close) and * PASSIVE_CLOSEREQ (reached from OPEN via reception of CloseReq) as internal intermediate states. These states are used to allow a receiver to process unread data before acknowledging the received connection-termination-request (the Close/CloseReq). Without such support, it will happen that passively-closed sockets enter CLOSED state while there is still unprocessed data in the queue; leading to unexpected and erratic API behaviour. PASSIVE_CLOSE has been mapped into TCPF_CLOSE_WAIT, so that the code will seamlessly work with inet_accept() (which tests for this state). The state names are thanks to Arnaldo, who suggested this naming scheme following an earlier revision of this patch. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/proto.c')
| -rw-r--r-- | net/dccp/proto.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 73006b747678..3489d3f21f50 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -60,8 +60,7 @@ void dccp_set_state(struct sock *sk, const int state) { const int oldstate = sk->sk_state; - dccp_pr_debug("%s(%p) %-10.10s -> %s\n", - dccp_role(sk), sk, + dccp_pr_debug("%s(%p) %s --> %s\n", dccp_role(sk), sk, dccp_state_name(oldstate), dccp_state_name(state)); WARN_ON(state == oldstate); @@ -134,14 +133,17 @@ EXPORT_SYMBOL_GPL(dccp_packet_name); const char *dccp_state_name(const int state) { static char *dccp_state_names[] = { - [DCCP_OPEN] = "OPEN", - [DCCP_REQUESTING] = "REQUESTING", - [DCCP_PARTOPEN] = "PARTOPEN", - [DCCP_LISTEN] = "LISTEN", - [DCCP_RESPOND] = "RESPOND", - [DCCP_CLOSING] = "CLOSING", - [DCCP_TIME_WAIT] = "TIME_WAIT", - [DCCP_CLOSED] = "CLOSED", + [DCCP_OPEN] = "OPEN", + [DCCP_REQUESTING] = "REQUESTING", + [DCCP_PARTOPEN] = "PARTOPEN", + [DCCP_LISTEN] = "LISTEN", + [DCCP_RESPOND] = "RESPOND", + [DCCP_CLOSING] = "CLOSING", + [DCCP_ACTIVE_CLOSEREQ] = "CLOSEREQ", + [DCCP_PASSIVE_CLOSE] = "PASSIVE_CLOSE", + [DCCP_PASSIVE_CLOSEREQ] = "PASSIVE_CLOSEREQ", + [DCCP_TIME_WAIT] = "TIME_WAIT", + [DCCP_CLOSED] = "CLOSED", }; if (state >= DCCP_MAX_STATES) |