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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2006-11-27 12:25:10 -0200
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-02 21:30:37 -0800
commit91cf5a17257e1d2ef936fbf0223c3436ca583af9 (patch)
treeeb7386ab5729d299bda6534c783378eb3fd73c4c /net/dccp
parentf5c2d6367b04fd5ba98a5f9846b5fb870423968a (diff)
[DCCP] ccid3: Fix calculation of t_ipi time of scheduled transmission
Problem:
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ccids/ccid3.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index df88c54b2ec5..fb1a5e89c023 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -304,11 +304,19 @@ static int ccid3_hc_tx_send_packet(struct sock *sk,
break;
case TFRC_SSTATE_NO_FBACK:
case TFRC_SSTATE_FBACK:
- delay = (timeval_delta(&now, &hctx->ccid3hctx_t_nom) -
- hctx->ccid3hctx_delta);
- delay /= -1000;
- /* divide by -1000 is to convert to ms and get sign right */
- rc = delay > 0 ? delay : 0;
+ delay = timeval_delta(&hctx->ccid3hctx_t_nom, &now);
+ /*
+ * Scheduling of packet transmissions [RFC 3448, 4.6]
+ *
+ * if (t_now > t_nom - delta)
+ * // send the packet now
+ * else
+ * // send the packet in (t_nom - t_now) milliseconds.
+ */
+ if (delay < hctx->ccid3hctx_delta)
+ rc = 0;
+ else
+ rc = delay/1000L;
break;
case TFRC_SSTATE_TERM:
DCCP_BUG("Illegal %s state TERM, sk=%p", dccp_role(sk), sk);