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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.cjdns;
# would be nice to merge 'cfg' with a //,
# but the json nesting is wacky.
cjdrouteConf = builtins.toJSON ( {
admin = {
bind = cfg.admin.bind;
password = "@CJDNS_ADMIN_PASSWORD@";
};
authorizedPasswords = map (p: { password = p; }) cfg.authorizedPasswords;
interfaces = {
ETHInterface = if (cfg.ETHInterface.bind != "") then [ cfg.ETHInterface ] else [ ];
UDPInterface = if (cfg.UDPInterface.bind != "") then [ cfg.UDPInterface ] else [ ];
};
privateKey = "@CJDNS_PRIVATE_KEY@";
resetAfterInactivitySeconds = 100;
router = {
interface = { type = "TUNInterface"; };
ipTunnel = {
allowedConnections = [];
outgoingConnections = [];
};
};
security = [ { exemptAngel = 1; setuser = "nobody"; } ];
});
in
{
options = {
services.cjdns = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable the cjdns network encryption
and routing engine. A file at /etc/cjdns.keys will
be created if it does not exist to contain a random
secret key that your IPv6 address will be derived from.
'';
};
authorizedPasswords = mkOption {
type = types.listOf types.str;
default = [ ];
example = [
"snyrfgkqsc98qh1y4s5hbu0j57xw5s0"
"z9md3t4p45mfrjzdjurxn4wuj0d8swv"
"49275fut6tmzu354pq70sr5b95qq0vj"
];
description = ''
Any remote cjdns nodes that offer these passwords on
connection will be allowed to route through this node.
'';
};
admin = {
bind = mkOption {
type = types.string;
default = "127.0.0.1:11234";
description = ''
Bind the administration port to this address and port.
'';
};
};
UDPInterface = {
bind = mkOption {
type = types.string;
default = "";
example = "192.168.1.32:43211";
description = ''
Address and port to bind UDP tunnels to.
'';
};
connectTo = mkOption {
type = types.attrsOf ( types.submodule (
{ options, ... }:
{ options = {
# TODO make host an option, and add it to networking.extraHosts
password = mkOption {
type = types.str;
description = "Authorized password to the opposite end of the tunnel.";
};
publicKey = mkOption {
type = types.str;
description = "Public key at the opposite end of the tunnel.";
};
};
}
));
default = { };
example = {
"192.168.1.1:27313" = {
password = "5kG15EfpdcKNX3f2GSQ0H1HC7yIfxoCoImnO5FHM";
publicKey = "371zpkgs8ss387tmr81q04mp0hg1skb51hw34vk1cq644mjqhup0.k";
};
};
description = ''
Credentials for making UDP tunnels.
'';
};
};
ETHInterface = {
bind = mkOption {
default = "";
example = "eth0";
description = ''
Bind to this device for native ethernet operation.
'';
};
beacon = mkOption {
type = types.int;
default = 2;
description = ''
Auto-connect to other cjdns nodes on the same network.
Options:
0: Disabled.
1: Accept beacons, this will cause cjdns to accept incoming
beacon messages and try connecting to the sender.
2: Accept and send beacons, this will cause cjdns to broadcast
messages on the local network which contain a randomly
generated per-session password, other nodes which have this
set to 1 or 2 will hear the beacon messages and connect
automatically.
'';
};
connectTo = mkOption {
type = types.attrsOf ( types.submodule (
{ options, ... }:
{ options = {
password = mkOption {
type = types.str;
description = "Authorized password to the opposite end of the tunnel.";
};
publicKey = mkOption {
type = types.str;
description = "Public key at the opposite end of the tunnel.";
};
};
}
));
default = { };
example = {
"01:02:03:04:05:06" = {
password = "5kG15EfpdcKNX3f2GSQ0H1HC7yIfxoCoImnO5FHM";
publicKey = "371zpkgs8ss387tmr81q04mp0hg1skb51hw34vk1cq644mjqhup0.k";
};
};
description = ''
Credentials for connecting look similar to UDP credientials
except they begin with the mac address.
'';
};
};
};
};
config = mkIf config.services.cjdns.enable {
boot.kernelModules = [ "tun" ];
# networking.firewall.allowedUDPPorts = ...
systemd.services.cjdns = {
description = "encrypted networking for everybody";
wantedBy = [ "multi-user.target" ];
after = [ "network-interfaces.target" ];
script = ''
source /etc/cjdns.keys
echo '${cjdrouteConf}' | sed \
-e "s/@CJDNS_ADMIN_PASSWORD@/$CJDNS_ADMIN_PASSWORD/g" \
-e "s/@CJDNS_PRIVATE_KEY@/$CJDNS_PRIVATE_KEY/g" \
| ${pkgs.cjdns}/bin/cjdroute
'';
serviceConfig = {
Type = "forking";
Restart = "on-failure";
};
};
system.activationScripts.cjdns = ''
grep -q "CJDNS_PRIVATE_KEY=" /etc/cjdns.keys || \
echo "CJDNS_PRIVATE_KEY=$(${pkgs.cjdns}/bin/makekey)" \
>> /etc/cjdns.keys
grep -q "CJDNS_ADMIN_PASSWORD=" /etc/cjdns.keys || \
echo "CJDNS_ADMIN_PASSWORD=$(${pkgs.coreutils}/bin/head -c 96 /dev/urandom | ${pkgs.coreutils}/bin/tr -dc A-Za-z0-9)" \
>> /etc/cjdns.keys
chmod 600 /etc/cjdns.keys
'';
assertions = [
{ assertion = ( cfg.ETHInterface.bind != "" || cfg.UDPInterface.bind != "" );
message = "Neither cjdns.ETHInterface.bind nor cjdns.UDPInterface.bind defined.";
}
{ assertion = config.networking.enableIPv6;
message = "networking.enableIPv6 must be enabled for CJDNS to work";
}
];
};
}
|