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Adding defaultGatewayWindowSize

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This allows setting the max tcp window size for the route of
the default gateway (usually the internet access).

It works only for non-DHCP configurations by now.
This commit is contained in:
Lluís Batlle i Rossell 2013-01-06 22:31:13 +01:00
parent 1aea92c4ce
commit 9a81748f20
1 changed files with 14 additions and 1 deletions
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15
modules/tasks/network-interfaces.nix
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@ -5,6 +5,10 @@ with pkgs.lib;
let let
cfg = config.networking; cfg = config.networking;
windowSize = if cfg.defaultGatewayWindowSize != "" then
"window ${cfg.defaultGatewayWindowSize}" else "";
interfaces = attrValues cfg.interfaces; interfaces = attrValues cfg.interfaces;
hasVirtuals = any (i: i.virtual) interfaces; hasVirtuals = any (i: i.virtual) interfaces;
@ -135,6 +139,15 @@ in
''; '';
}; };
networking.defaultGatewayWindowSize = mkOption {
default = "";
example = "524288";
description = ''
The window size of the default gateway. It limits maximal data bursts that TCP peers
are allowed to send to us.
'';
};
networking.nameservers = mkOption { networking.nameservers = mkOption {
default = []; default = [];
example = ["130.161.158.4" "130.161.33.17"]; example = ["130.161.158.4" "130.161.33.17"];
@ -282,7 +295,7 @@ in
# Set the default gateway. # Set the default gateway.
${optionalString (cfg.defaultGateway != "") '' ${optionalString (cfg.defaultGateway != "") ''
# FIXME: get rid of "|| true" (necessary to make it idempotent). # FIXME: get rid of "|| true" (necessary to make it idempotent).
ip route add default via "${cfg.defaultGateway}" || true ip route add default via "${cfg.defaultGateway}" ${windowSize} || true
''} ''}
# Turn on forwarding if any interface has enabled proxy_arp. # Turn on forwarding if any interface has enabled proxy_arp.