# /etc files related to networking, such as /etc/services. { config, lib, pkgs, ... }: with lib; let cfg = config.networking; localhostMapped4 = cfg.hosts ? "127.0.0.1" && elem "localhost" cfg.hosts."127.0.0.1"; localhostMapped6 = cfg.hosts ? "::1" && elem "localhost" cfg.hosts."::1"; localhostMultiple = any (elem "localhost") (attrValues (removeAttrs cfg.hosts [ "127.0.0.1" "::1" ])); in { options = { networking.hosts = lib.mkOption { type = types.attrsOf (types.listOf types.str); example = literalExample '' { "127.0.0.1" = [ "foo.bar.baz" ]; "192.168.0.2" = [ "fileserver.local" "nameserver.local" ]; }; ''; description = '' Locally defined maps of hostnames to IP addresses. ''; }; networking.extraHosts = lib.mkOption { type = types.lines; default = ""; example = "192.168.0.1 lanlocalhost"; description = '' Additional verbatim entries to be appended to /etc/hosts. ''; }; networking.hostConf = lib.mkOption { type = types.lines; default = "multi on"; example = '' multi on reorder on trim lan ''; description = '' The contents of /etc/host.conf. See also host.conf5. ''; }; networking.timeServers = mkOption { default = [ "0.nixos.pool.ntp.org" "1.nixos.pool.ntp.org" "2.nixos.pool.ntp.org" "3.nixos.pool.ntp.org" ]; description = '' The set of NTP servers from which to synchronise. ''; }; networking.proxy = { default = lib.mkOption { type = types.nullOr types.str; default = null; description = '' This option specifies the default value for httpProxy, httpsProxy, ftpProxy and rsyncProxy. ''; example = "http://127.0.0.1:3128"; }; httpProxy = lib.mkOption { type = types.nullOr types.str; default = cfg.proxy.default; description = '' This option specifies the http_proxy environment variable. ''; example = "http://127.0.0.1:3128"; }; httpsProxy = lib.mkOption { type = types.nullOr types.str; default = cfg.proxy.default; description = '' This option specifies the https_proxy environment variable. ''; example = "http://127.0.0.1:3128"; }; ftpProxy = lib.mkOption { type = types.nullOr types.str; default = cfg.proxy.default; description = '' This option specifies the ftp_proxy environment variable. ''; example = "http://127.0.0.1:3128"; }; rsyncProxy = lib.mkOption { type = types.nullOr types.str; default = cfg.proxy.default; description = '' This option specifies the rsync_proxy environment variable. ''; example = "http://127.0.0.1:3128"; }; allProxy = lib.mkOption { type = types.nullOr types.str; default = cfg.proxy.default; description = '' This option specifies the all_proxy environment variable. ''; example = "http://127.0.0.1:3128"; }; noProxy = lib.mkOption { type = types.nullOr types.str; default = null; description = '' This option specifies the no_proxy environment variable. If a default proxy is used and noProxy is null, then noProxy will be set to 127.0.0.1,localhost. ''; example = "127.0.0.1,localhost,.localdomain"; }; envVars = lib.mkOption { type = types.attrs; internal = true; default = {}; description = '' Environment variables used for the network proxy. ''; }; }; }; config = { assertions = [{ assertion = localhostMapped4; message = ''`networking.hosts` doesn't map "127.0.0.1" to "localhost"''; } { assertion = !cfg.enableIPv6 || localhostMapped6; message = ''`networking.hosts` doesn't map "::1" to "localhost"''; } { assertion = !localhostMultiple; message = '' `networking.hosts` maps "localhost" to something other than "127.0.0.1" or "::1". This will break some applications. Please use `networking.extraHosts` if you really want to add such a mapping. ''; }]; networking.hosts = { "127.0.0.1" = [ "localhost" ]; } // optionalAttrs (cfg.hostName != "") { "127.0.1.1" = [ cfg.hostName ]; } // optionalAttrs cfg.enableIPv6 { "::1" = [ "localhost" ]; }; environment.etc = { # /etc/services: TCP/UDP port assignments. services.source = pkgs.iana-etc + "/etc/services"; # /etc/protocols: IP protocol numbers. protocols.source = pkgs.iana-etc + "/etc/protocols"; # /etc/hosts: Hostname-to-IP mappings. hosts.text = let oneToString = set: ip: ip + " " + concatStringsSep " " set.${ip}; allToString = set: concatMapStringsSep "\n" (oneToString set) (attrNames set); in '' ${allToString (filterAttrs (_: v: v != []) cfg.hosts)} ${cfg.extraHosts} ''; # /etc/host.conf: resolver configuration file "host.conf".text = cfg.hostConf; } // optionalAttrs (pkgs.stdenv.hostPlatform.libc == "glibc") { # /etc/rpc: RPC program numbers. rpc.source = pkgs.glibc.out + "/etc/rpc"; }; networking.proxy.envVars = optionalAttrs (cfg.proxy.default != null) { # other options already fallback to proxy.default no_proxy = "127.0.0.1,localhost"; } // optionalAttrs (cfg.proxy.httpProxy != null) { http_proxy = cfg.proxy.httpProxy; } // optionalAttrs (cfg.proxy.httpsProxy != null) { https_proxy = cfg.proxy.httpsProxy; } // optionalAttrs (cfg.proxy.rsyncProxy != null) { rsync_proxy = cfg.proxy.rsyncProxy; } // optionalAttrs (cfg.proxy.ftpProxy != null) { ftp_proxy = cfg.proxy.ftpProxy; } // optionalAttrs (cfg.proxy.allProxy != null) { all_proxy = cfg.proxy.allProxy; } // optionalAttrs (cfg.proxy.noProxy != null) { no_proxy = cfg.proxy.noProxy; }; # Install the proxy environment variables environment.sessionVariables = cfg.proxy.envVars; }; }