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8e83134db4
linux/net/rxrpc
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David Howells 8e83134db4 rxrpc: Send pings to get RTT data 
Send a PING ACK packet to the peer when we get a new incoming call from a
peer we don't have a record for.  The PING RESPONSE ACK packet will tell us
the following about the peer:

 (1) its receive window size

 (2) its MTU sizes

 (3) its support for jumbo DATA packets

 (4) if it supports slow start (similar to RFC 5681)

 (5) an estimate of the RTT

This is necessary because the peer won't normally send us an ACK until it
gets to the Rx phase and we send it a packet, but we would like to know
some of this information before we start sending packets.

A pair of tracepoints are added so that RTT determination can be observed.

Signed-off-by: David Howells <dhowells@redhat.com>
2016-09-22 08:21:24 +01:00
..
af_rxrpc.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
ar-internal.h rxrpc: Send pings to get RTT data 2016-09-22 08:21:24 +01:00
call_accept.c rxrpc: Add a tracepoint to follow packets in the Rx buffer 2016-09-17 11:24:03 +01:00
call_event.c rxrpc: Add re-sent Tx annotation 2016-09-22 01:23:50 +01:00
call_object.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
conn_client.c rxrpc: Add connection tracepoint and client conn state tracepoint 2016-09-17 11:24:03 +01:00
conn_event.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
conn_object.c rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs 2016-09-22 01:23:50 +01:00
conn_service.c rxrpc: Add connection tracepoint and client conn state tracepoint 2016-09-17 11:24:03 +01:00
input.c rxrpc: Send pings to get RTT data 2016-09-22 08:21:24 +01:00
insecure.c rxrpc: Rewrite the data and ack handling code 2016-09-08 11:10:12 +01:00
Kconfig rxrpc: Add config to inject packet loss 2016-09-17 11:24:04 +01:00
key.c rxrpc: Use structs to hold connection params and protocol info 2016-06-22 09:09:59 +01:00
local_event.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
local_object.c rxrpc: Make IPv6 support conditional on CONFIG_IPV6 2016-09-17 03:58:45 -04:00
Makefile rxrpc: Split sendmsg from packet transmission code 2016-09-04 21:41:39 +01:00
misc.c rxrpc: Send pings to get RTT data 2016-09-22 08:21:24 +01:00
output.c rxrpc: Send pings to get RTT data 2016-09-22 08:21:24 +01:00
peer_event.c rxrpc: Add per-peer RTT tracker 2016-09-22 01:26:25 +01:00
peer_object.c rxrpc: Make IPv6 support conditional on CONFIG_IPV6 2016-09-17 03:58:45 -04:00
proc.c rxrpc: Add IPv6 support 2016-09-13 23:09:13 +01:00
recvmsg.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
rxkad.c rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs 2016-09-22 01:23:50 +01:00
security.c rxrpc: Rewrite the data and ack handling code 2016-09-08 11:10:12 +01:00
sendmsg.c rxrpc: Don't store the rxrpc header in the Tx queue sk_buffs 2016-09-22 01:23:50 +01:00
skbuff.c rxrpc: Improve skb tracing 2016-09-17 11:24:04 +01:00
sysctl.c rxrpc: Correctly initialise, limit and transmit call->rx_winsize 2016-09-13 22:38:45 +01:00
utils.c rxrpc: Make IPv6 support conditional on CONFIG_IPV6 2016-09-17 03:58:45 -04:00