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Merge pull request #21592 from joachifm/cjdns-optional-extraHosts

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cjdns service: optional extraHosts
This commit is contained in:
Joachim F 2017-01-04 18:54:09 +01:00 committed by GitHub
commit 9e0dc9fa7c
1 changed files with 41 additions and 20 deletions
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57
nixos/modules/services/networking/cjdns.nix
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@ -19,21 +19,30 @@ let
type = types.str;
description = "Public key at the opposite end of the tunnel.";
};
hostname = mkOption {
default = "";
example = "foobar.hype";
type = types.str;
description = "Optional hostname to add to /etc/hosts; prevents reverse lookup failures.";
};
};
};
# check for the required attributes, otherwise
# permit attributes not undefined here
checkPeers = x:
x // {
connectTo = mapAttrs
(name: value:
if !hasAttr "publicKey" value then abort "cjdns peer ${name} missing a publicKey" else
if !hasAttr "password" value then abort "cjdns peer ${name} missing a password" else
value
)
x.connectTo;
};
# Additional /etc/hosts entries for peers with an associated hostname
cjdnsExtraHosts = import (pkgs.runCommand "cjdns-hosts" {}
# Generate a builder that produces an output usable as a Nix string value
''
exec >$out
echo \'\'
${concatStringsSep "\n" (mapAttrsToList (k: v:
optionalString (v.hostname != "")
"echo $(${pkgs.cjdns}/bin/publictoip6 ${v.publicKey}) ${v.hostname}")
(cfg.ETHInterface.connectTo // cfg.UDPInterface.connectTo))}
echo \'\'
'');
parseModules = x:
x // { connectTo = mapAttrs (name: value: { inherit (value) password publicKey; }) x.connectTo; };
# would be nice to merge 'cfg' with a //,
# but the json nesting is wacky.
@ -44,8 +53,8 @@ let
};
authorizedPasswords = map (p: { password = p; }) cfg.authorizedPasswords;
interfaces = {
ETHInterface = if (cfg.ETHInterface.bind != "") then [ (checkPeers cfg.ETHInterface) ] else [ ];
UDPInterface = if (cfg.UDPInterface.bind != "") then [ (checkPeers cfg.UDPInterface) ] else [ ];
ETHInterface = if (cfg.ETHInterface.bind != "") then [ (parseModules cfg.ETHInterface) ] else [ ];
UDPInterface = if (cfg.UDPInterface.bind != "") then [ (parseModules cfg.UDPInterface) ] else [ ];
};
privateKey = "@CJDNS_PRIVATE_KEY@";
@ -125,11 +134,11 @@ in
'';
};
connectTo = mkOption {
type = types.attrsOf (types.attrsOf types.str);
type = types.attrsOf ( types.submodule ( connectToSubmodule ) );
default = { };
example = {
"192.168.1.1:27313" = {
user = "foobar";
hostname = "homer.hype";
password = "5kG15EfpdcKNX3f2GSQ0H1HC7yIfxoCoImnO5FHM";
publicKey = "371zpkgs8ss387tmr81q04mp0hg1skb51hw34vk1cq644mjqhup0.k";
};
@ -170,11 +179,11 @@ in
};
connectTo = mkOption {
type = types.attrsOf (types.attrsOf types.str);
type = types.attrsOf ( types.submodule ( connectToSubmodule ) );
default = { };
example = {
"01:02:03:04:05:06" = {
user = "foobar";
hostname = "homer.hype";
password = "5kG15EfpdcKNX3f2GSQ0H1HC7yIfxoCoImnO5FHM";
publicKey = "371zpkgs8ss387tmr81q04mp0hg1skb51hw34vk1cq644mjqhup0.k";
};
@ -186,6 +195,16 @@ in
};
};
addExtraHosts = mkOption {
type = types.bool;
default = false;
description = ''
Whether to add cjdns peers with an associated hostname to
<filename>/etc/hosts</filename>. Beware that enabling this
incurs heavy eval-time costs.
'';
};
};
};
@ -248,6 +267,8 @@ in
};
};
networking.extraHosts = mkIf cfg.addExtraHosts cjdnsExtraHosts;
assertions = [
{ assertion = ( cfg.ETHInterface.bind != "" || cfg.UDPInterface.bind != "" || cfg.confFile != null );
message = "Neither cjdns.ETHInterface.bind nor cjdns.UDPInterface.bind defined.";