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[DCCP]: Introduce dccp_write_xmit from code in dccp_sendmsg

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This way it gets closer to the TCP flow, where congestion window
checks are done, it seems we can map ccid_hc_tx_send_packet in
dccp_write_xmit to tcp_snd_wnd_test in tcp_write_xmit, a CCID2
decision should just fit in here as well...

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
2005-08-09 20:30:56 -07:00
committed by David S. Miller
parent 0d48d93947
commit 27258ee54f
5 changed files with 57 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
net/dccp/proto.c
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@ -182,8 +182,7 @@ int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
return -EMSGSIZE;
lock_sock(sk);
timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
timeo = sock_sndtimeo(sk, noblock);
/*
* We have to use sk_stream_wait_connect here to set sk_write_pending,
@ -192,77 +191,27 @@ int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
/* Wait for a connection to finish. */
if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN | DCCPF_CLOSING))
if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0)
goto out_err;
goto out_release;
size = sk->sk_prot->max_header + len;
release_sock(sk);
skb = sock_alloc_send_skb(sk, size, noblock, &rc);
lock_sock(sk);
if (skb == NULL)
goto out_release;
skb_reserve(skb, sk->sk_prot->max_header);
rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
if (rc == 0) {
struct dccp_skb_cb *dcb = DCCP_SKB_CB(skb);
const struct dccp_ackpkts *ap = dp->dccps_hc_rx_ackpkts;
long delay;
if (rc != 0)
goto out_discard;
/*
* XXX: This is just to match the Waikato tree CA interaction
* points, after the CCID3 code is stable and I have a better
* understanding of behaviour I'll change this to look more like
* TCP.
*/
while (1) {
rc = ccid_hc_tx_send_packet(dp->dccps_hc_tx_ccid, sk,
skb, len, &delay);
if (rc == 0)
break;
if (rc != -EAGAIN)
goto out_discard;
if (delay > timeo)
goto out_discard;
release_sock(sk);
delay = schedule_timeout(delay);
lock_sock(sk);
timeo -= delay;
if (signal_pending(current))
goto out_interrupted;
rc = -EPIPE;
if (!(sk->sk_state == DCCP_PARTOPEN || sk->sk_state == DCCP_OPEN))
goto out_discard;
}
if (sk->sk_state == DCCP_PARTOPEN) {
/* See 8.1.5. Handshake Completion */
inet_csk_schedule_ack(sk);
inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK, inet_csk(sk)->icsk_rto, TCP_RTO_MAX);
dcb->dccpd_type = DCCP_PKT_DATAACK;
/* FIXME: we really should have a dccps_ack_pending or use icsk */
} else if (inet_csk_ack_scheduled(sk) ||
(dp->dccps_options.dccpo_send_ack_vector &&
ap->dccpap_buf_ackno != DCCP_MAX_SEQNO + 1 &&
ap->dccpap_ack_seqno == DCCP_MAX_SEQNO + 1))
dcb->dccpd_type = DCCP_PKT_DATAACK;
else
dcb->dccpd_type = DCCP_PKT_DATA;
dccp_transmit_skb(sk, skb);
ccid_hc_tx_packet_sent(dp->dccps_hc_tx_ccid, sk, 0, len);
} else {
out_discard:
kfree_skb(skb);
}
rc = dccp_write_xmit(sk, skb, len);
out_release:
release_sock(sk);
return rc ? : len;
out_err:
rc = sk_stream_error(sk, flags, rc);
out_discard:
kfree_skb(skb);
goto out_release;
out_interrupted:
rc = sock_intr_errno(timeo);
goto out_discard;
}
EXPORT_SYMBOL(dccp_sendmsg);