diff options
Diffstat (limited to 'nixos/modules/config')
| -rw-r--r-- | nixos/modules/config/networking.nix | 61 |
1 files changed, 39 insertions, 22 deletions
diff --git a/nixos/modules/config/networking.nix b/nixos/modules/config/networking.nix index 1ef5313d3fdd..1eb6fb43604a 100644 --- a/nixos/modules/config/networking.nix +++ b/nixos/modules/config/networking.nix @@ -16,6 +16,13 @@ let resolvconfOptions = cfg.resolvconfOptions ++ optional cfg.dnsSingleRequest "single-request" ++ optional cfg.dnsExtensionMechanism "edns0"; + + + 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 { @@ -23,8 +30,7 @@ in options = { networking.hosts = lib.mkOption { - type = types.attrsOf ( types.listOf types.str ); - default = {}; + type = types.attrsOf (types.listOf types.str); example = literalExample '' { "127.0.0.1" = [ "foo.bar.baz" ]; @@ -192,6 +198,29 @@ in 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"; @@ -203,25 +232,13 @@ in "rpc".source = pkgs.glibc.out + "/etc/rpc"; # /etc/hosts: Hostname-to-IP mappings. - "hosts".text = - let oneToString = set : ip : ip + " " + concatStringsSep " " ( getAttr ip set ); - allToString = set : concatMapStringsSep "\n" ( oneToString set ) ( attrNames set ); - userLocalHosts = optionalString - ( builtins.hasAttr "127.0.0.1" cfg.hosts ) - ( concatStringsSep " " ( remove "localhost" cfg.hosts."127.0.0.1" )); - userLocalHosts6 = optionalString - ( builtins.hasAttr "::1" cfg.hosts ) - ( concatStringsSep " " ( remove "localhost" cfg.hosts."::1" )); - otherHosts = allToString ( removeAttrs cfg.hosts [ "127.0.0.1" "::1" ]); - in - '' - 127.0.0.1 ${userLocalHosts} localhost - ${optionalString cfg.enableIPv6 '' - ::1 ${userLocalHosts6} localhost - ''} - ${otherHosts} - ${cfg.extraHosts} - ''; + "hosts".text = let + oneToString = set: ip: ip + " " + concatStringsSep " " set.${ip}; + allToString = set: concatMapStringsSep "\n" (oneToString set) (attrNames set); + in '' + ${allToString cfg.hosts} + ${cfg.extraHosts} + ''; # /etc/host.conf: resolver configuration file "host.conf".text = cfg.hostConf; @@ -296,4 +313,4 @@ in }; - } +} |