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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-12-16 16:06:03 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:55:01 -0800 |
| commit | d83bd95bf11444993b9c405b255ffa644c32d414 (patch) | |
| tree | 57311d4ffaa31ea73ca4a18a58fed985a14576cc | |
| parent | dcfbc7e97a2e3a0d73a2e41e1bddb988dcca701e (diff) | |
| download | linux-d83bd95bf11444993b9c405b255ffa644c32d414.tar.gz linux-d83bd95bf11444993b9c405b255ffa644c32d414.tar.bz2 linux-d83bd95bf11444993b9c405b255ffa644c32d414.zip | |
[DCCP]: Check for unread data on close
This removes one FIXME with regard to close when there is still unread data.
The mechanism is implemented similar to TCP: with regard to DCCP-specifics,
a Reset with Code 2, "Aborted" is sent to the peer.
This corresponds in part to RFC 4340, 8.1.1 and 8.1.5.
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@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/dccp/proto.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index d48005f653c7..5f47b458ed8f 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -891,6 +891,7 @@ void dccp_close(struct sock *sk, long timeout) { struct dccp_sock *dp = dccp_sk(sk); struct sk_buff *skb; + u32 data_was_unread = 0; int state; lock_sock(sk); @@ -913,12 +914,17 @@ void dccp_close(struct sock *sk, long timeout) * descriptor close, not protocol-sourced closes, because the *reader process may not have drained the data yet! */ - /* FIXME: check for unread data */ while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { + data_was_unread += skb->len; __kfree_skb(skb); } - if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { + if (data_was_unread) { + /* Unread data was tossed, send an appropriate Reset Code */ + DCCP_WARN("DCCP: ABORT -- %u bytes unread\n", data_was_unread); + dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); + dccp_set_state(sk, DCCP_CLOSED); + } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { /* Check zero linger _after_ checking for unread data. */ sk->sk_prot->disconnect(sk, 0); } else if (dccp_close_state(sk)) { |