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Improve readability of comments for DELAY_ACK() macro.

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This commit is contained in:
Hiren Panchasara 2014-04-03 01:46:03 +00:00
parent 759d456324
commit 855363811f
1 changed files with 8 additions and 7 deletions
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15
sys/netinet/tcp_input.c
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@ -503,13 +503,14 @@ do { \
/*
* Indicate whether this ack should be delayed. We can delay the ack if
* - there is no delayed ack timer in progress and
* - our last ack wasn't a 0-sized window. We never want to delay
* the ack that opens up a 0-sized window and
* - delayed acks are enabled or
* - this is a half-synchronized T/TCP connection.
* - the segment size is not larger than the MSS and LRO wasn't used
* for this segment.
* following conditions are met:
* - There is no delayed ack timer in progress.
* - Our last ack wasn't a 0-sized window. We never want to delay
* the ack that opens up a 0-sized window.
* - LRO wasn't used for this segment. We make sure by checking that the
* segment size is not larger than the MSS.
* - Delayed acks are enabled or this is a half-synchronized T/TCP
* connection.
*/
#define DELAY_ACK(tp, tlen) \
((!tcp_timer_active(tp, TT_DELACK) && \