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tcp: RFC6298 supersedes RFC2988bis 

Updates some comments to track RFC6298

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: H.K. Jerry Chu <hkchu@google.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2012-04-12 19:48:40 +00:00 committed by David S. Miller
parent eff98db027
commit fd4f2cead6
3 changed files with 4 additions and 4 deletions
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2
include/net/tcp.h
View File

@ -123,7 +123,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
#endif
#define TCP_RTO_MAX ((unsigned)(120*HZ))
#define TCP_RTO_MIN ((unsigned)(HZ/5))
#define TCP_TIMEOUT_INIT ((unsigned)(1*HZ)) /* RFC2988bis initial RTO value */
#define TCP_TIMEOUT_INIT ((unsigned)(1*HZ)) /* RFC6298 2.1 initial RTO value */
#define TCP_TIMEOUT_FALLBACK ((unsigned)(3*HZ)) /* RFC 1122 initial RTO value, now
* used as a fallback RTO for the
* initial data transmission if no

2
net/ipv4/inet_connection_sock.c
View File

@ -514,7 +514,7 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
/* Normally all the openreqs are young and become mature
* (i.e. converted to established socket) for first timeout.
* If synack was not acknowledged for 3 seconds, it means
* If synack was not acknowledged for 1 second, it means
* one of the following things: synack was lost, ack was lost,
* rtt is high or nobody planned to ack (i.e. synflood).
* When server is a bit loaded, queue is populated with old

4
net/ipv4/tcp_input.c
View File

@ -936,7 +936,7 @@ static void tcp_init_metrics(struct sock *sk)
tcp_set_rto(sk);
reset:
if (tp->srtt == 0) {
/* RFC2988bis: We've failed to get a valid RTT sample from
/* RFC6298: 5.7 We've failed to get a valid RTT sample from
* 3WHS. This is most likely due to retransmission,
* including spurious one. Reset the RTO back to 3secs
* from the more aggressive 1sec to avoid more spurious
@ -946,7 +946,7 @@ static void tcp_init_metrics(struct sock *sk)
inet_csk(sk)->icsk_rto = TCP_TIMEOUT_FALLBACK;
}
/* Cut cwnd down to 1 per RFC5681 if SYN or SYN-ACK has been
* retransmitted. In light of RFC2988bis' more aggressive 1sec
* retransmitted. In light of RFC6298 more aggressive 1sec
* initRTO, we only reset cwnd when more than 1 SYN/SYN-ACK
* retransmission has occurred.
*/