{ config, lib, pkgs, ... }: with lib; let cfg = config.services.i2pd; homeDir = "/var/lib/i2pd"; extip = "EXTIP=\$(${pkgs.curl.bin}/bin/curl -sf \"http://jsonip.com\" | ${pkgs.gawk}/bin/awk -F'\"' '{print $4}')"; toYesNo = b: if b then "yes" else "no"; mkEndpointOpt = name: addr: port: { enable = mkEnableOption name; name = mkOption { type = types.str; default = name; description = "The endpoint name."; }; address = mkOption { type = types.str; default = addr; description = "Bind address for ${name} endpoint. Default: " + addr; }; port = mkOption { type = types.int; default = port; description = "Bind port for ${name} endoint. Default: " + toString port; }; }; commonTunOpts = let i2cpOpts = { length = mkOption { type = types.int; description = "Guaranteed minimum hops."; default = 3; }; quantity = mkOption { type = types.int; description = "Number of simultaneous tunnels."; default = 5; }; }; in name: { outbound = i2cpOpts; inbound = i2cpOpts; crypto.tagsToSend = mkOption { type = types.int; description = "Number of ElGamal/AES tags to send."; default = 40; }; destination = mkOption { type = types.str; description = "Remote endpoint, I2P hostname or b32.i2p address."; }; keys = mkOption { type = types.str; default = name + "-keys.dat"; description = "Keyset used for tunnel identity."; }; } // mkEndpointOpt name "127.0.0.1" 0; i2pdConf = pkgs.writeText "i2pd.conf" '' ipv6 = ${toYesNo cfg.enableIPv6} notransit = ${toYesNo cfg.notransit} floodfill = ${toYesNo cfg.floodfill} ${if isNull cfg.port then "" else "port = ${toString cfg.port}"} ${flip concatMapStrings (collect (proto: proto ? port && proto ? address && proto ? name) cfg.proto) (proto: let portStr = toString proto.port; in '' [${proto.name}] address = ${proto.address} port = ${toString proto.port} enabled = ${toYesNo proto.enable} '') } ''; i2pdTunnelConf = pkgs.writeText "i2pd-tunnels.conf" '' ${flip concatMapStrings (collect (tun: tun ? port && tun ? destination) cfg.outTunnels) (tun: let portStr = toString tun.port; in '' [${tun.name}] type = client destination = ${tun.destination} keys = ${tun.keys} address = ${tun.address} port = ${toString tun.port} inbound.length = ${toString tun.inbound.length} outbound.length = ${toString tun.outbound.length} inbound.quantity = ${toString tun.inbound.quantity} outbound.quantity = ${toString tun.outbound.quantity} crypto.tagsToSend = ${toString tun.crypto.tagsToSend} '') } ${flip concatMapStrings (collect (tun: tun ? port && tun ? host) cfg.inTunnels) (tun: let portStr = toString tun.port; in '' [${tun.name}] type = server destination = ${tun.destination} keys = ${tun.keys} host = ${tun.address} port = ${tun.port} inport = ${tun.inPort} accesslist = ${concatStringSep "," tun.accessList} '') } ''; i2pdSh = pkgs.writeScriptBin "i2pd" '' #!/bin/sh ${if isNull cfg.extIp then extip else ""} ${pkgs.i2pd}/bin/i2pd --log=1 \ --host=${if isNull cfg.extIp then "$EXTIP" else cfg.extIp} \ --conf=${i2pdConf} \ --tunconf=${i2pdTunnelConf} ''; in { ###### interface options = { services.i2pd = { enable = mkOption { type = types.bool; default = false; description = '' Enables I2Pd as a running service upon activation. ''; }; extIp = mkOption { type = with types; nullOr str; default = null; description = '' Your external IP. ''; }; notransit = mkOption { type = types.bool; default = false; description = '' Tells the router to not accept transit tunnels during startup. ''; }; floodfill = mkOption { type = types.bool; default = false; description = '' If the router is declared to be unreachable and needs introduction nodes. ''; }; port = mkOption { type = with types; nullOr int; default = null; description = '' I2P listen port. If no one is given the router will pick between 9111 and 30777. ''; }; enableIPv6 = mkOption { type = types.bool; default = false; description = '' Enables IPv6 connectivity. Disabled by default. ''; }; proto.http = mkEndpointOpt "http" "127.0.0.1" 7070; proto.sam = mkEndpointOpt "sam" "127.0.0.1" 7656; proto.bob = mkEndpointOpt "bob" "127.0.0.1" 2827; proto.i2pControl = mkEndpointOpt "i2pcontrol" "127.0.0.1" 7650; proto.httpProxy = mkEndpointOpt "httpproxy" "127.0.0.1" 4446; proto.socksProxy = mkEndpointOpt "socksproxy" "127.0.0.1" 4447; outTunnels = mkOption { default = {}; type = with types; loaOf (submodule ( { name, config, ... }: { options = commonTunOpts name; config = { name = mkDefault name; }; } )); description = '' Connect to someone as a client and establish a local accept endpoint ''; }; inTunnels = mkOption { default = {}; type = with types; loaOf (submodule ( { name, config, ... }: { options = { inPort = mkOption { type = types.int; default = 0; description = "Service port. Default to the tunnel's listen port."; }; accessList = mkOption { type = with types; listOf str; default = []; description = "I2P nodes that are allowed to connect to this service."; }; } // commonTunOpts name; config = { name = mkDefault name; }; } )); description = '' Serve something on I2P network at port and delegate requests to address inPort. ''; }; }; }; ###### implementation config = mkIf cfg.enable { users.extraUsers.i2pd = { group = "i2pd"; description = "I2Pd User"; home = homeDir; createHome = true; uid = config.ids.uids.i2pd; }; users.extraGroups.i2pd.gid = config.ids.gids.i2pd; systemd.services.i2pd = { description = "Minimal I2P router"; after = [ "network.target" ]; wantedBy = [ "multi-user.target" ]; serviceConfig = { User = "i2pd"; WorkingDirectory = homeDir; Restart = "on-abort"; ExecStart = "${i2pdSh}/bin/i2pd"; }; }; }; }