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Increase the ReplayWindow default from 16 to 32.

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As a rule, it seems reasonable to make sure that tinc operates correctly
on at least 1G links, since these are pretty common. However, I have
observed replay window issues when operating at speeds of 600 Mbit/s and
above, especially when the receiving end is a Windows system (not sure
why). This commit increases the default so that this won't occur on
fresh setups.
This commit is contained in:
Etienne Dechamps 2015-03-15 18:01:03 +00:00
parent 94f49a163a
commit 7027bba541
3 changed files with 5 additions and 5 deletions
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4
doc/tinc.conf.5.in
View file

@ -464,10 +464,10 @@ and
.Ev REMOTEPORT .Ev REMOTEPORT
are available. are available.
.El .El
.It Va ReplayWindow Li = Ar bytes Pq 16 .It Va ReplayWindow Li = Ar bytes Pq 32
This is the size of the replay tracking window for each remote node, in bytes. This is the size of the replay tracking window for each remote node, in bytes.
The window is a bitfield which tracks 1 packet per bit, so for example The window is a bitfield which tracks 1 packet per bit, so for example
the default setting of 16 will track up to 128 packets in the window. In high the default setting of 32 will track up to 256 packets in the window. In high
bandwidth scenarios, setting this to a higher value can reduce packet loss from bandwidth scenarios, setting this to a higher value can reduce packet loss from
the interaction of replay tracking with underlying real packet loss and/or the interaction of replay tracking with underlying real packet loss and/or
reordering. Setting this to zero will disable replay tracking completely and reordering. Setting this to zero will disable replay tracking completely and

4
doc/tinc.texi
View file

@ -1207,10 +1207,10 @@ The environment variables @env{NAME}, @env{NODE}, @env{REMOTEADDRES} and @env{RE
@end table @end table
@cindex ReplayWindow @cindex ReplayWindow
@item ReplayWindow = <bytes> (16) @item ReplayWindow = <bytes> (32)
This is the size of the replay tracking window for each remote node, in bytes. This is the size of the replay tracking window for each remote node, in bytes.
The window is a bitfield which tracks 1 packet per bit, so for example The window is a bitfield which tracks 1 packet per bit, so for example
the default setting of 16 will track up to 128 packets in the window. In high the default setting of 32 will track up to 256 packets in the window. In high
bandwidth scenarios, setting this to a higher value can reduce packet loss from bandwidth scenarios, setting this to a higher value can reduce packet loss from
the interaction of replay tracking with underlying real packet loss and/or the interaction of replay tracking with underlying real packet loss and/or
reordering. Setting this to zero will disable replay tracking completely and reordering. Setting this to zero will disable replay tracking completely and

2
src/net_packet.c
View file

@ -64,7 +64,7 @@ static char lzo_wrkmem[LZO1X_999_MEM_COMPRESS > LZO1X_1_MEM_COMPRESS ? LZO1X_999
static void send_udppacket(node_t *, vpn_packet_t *); static void send_udppacket(node_t *, vpn_packet_t *);
unsigned replaywin = 16; unsigned replaywin = 32;
bool localdiscovery = true; bool localdiscovery = true;
bool udp_discovery = true; bool udp_discovery = true;
int udp_discovery_keepalive_interval = 10; int udp_discovery_keepalive_interval = 10;