149 lines
4.5 KiB
Nix
149 lines
4.5 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.services.pppd;
|
|
in
|
|
{
|
|
meta = {
|
|
maintainers = with maintainers; [ danderson ];
|
|
};
|
|
|
|
options = {
|
|
services.pppd = {
|
|
enable = mkEnableOption (lib.mdDoc "pppd");
|
|
|
|
package = mkPackageOption pkgs "ppp" { };
|
|
|
|
peers = mkOption {
|
|
default = {};
|
|
description = lib.mdDoc "pppd peers.";
|
|
type = types.attrsOf (types.submodule (
|
|
{ name, ... }:
|
|
{
|
|
options = {
|
|
name = mkOption {
|
|
type = types.str;
|
|
default = name;
|
|
example = "dialup";
|
|
description = lib.mdDoc "Name of the PPP peer.";
|
|
};
|
|
|
|
enable = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
example = false;
|
|
description = lib.mdDoc "Whether to enable this PPP peer.";
|
|
};
|
|
|
|
autostart = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
example = false;
|
|
description = lib.mdDoc "Whether the PPP session is automatically started at boot time.";
|
|
};
|
|
|
|
config = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
description = lib.mdDoc "pppd configuration for this peer, see the pppd(8) man page.";
|
|
};
|
|
};
|
|
}));
|
|
};
|
|
};
|
|
};
|
|
|
|
config = let
|
|
enabledConfigs = filter (f: f.enable) (attrValues cfg.peers);
|
|
|
|
mkEtc = peerCfg: {
|
|
name = "ppp/peers/${peerCfg.name}";
|
|
value.text = peerCfg.config;
|
|
};
|
|
|
|
mkSystemd = peerCfg: {
|
|
name = "pppd-${peerCfg.name}";
|
|
value = {
|
|
restartTriggers = [ config.environment.etc."ppp/peers/${peerCfg.name}".source ];
|
|
before = [ "network.target" ];
|
|
wants = [ "network.target" ];
|
|
after = [ "network-pre.target" ];
|
|
environment = {
|
|
# pppd likes to write directly into /var/run. This is rude
|
|
# on a modern system, so we use libredirect to transparently
|
|
# move those files into /run/pppd.
|
|
LD_PRELOAD = "${pkgs.libredirect}/lib/libredirect.so";
|
|
NIX_REDIRECTS = "/var/run=/run/pppd";
|
|
};
|
|
serviceConfig = let
|
|
capabilities = [
|
|
"CAP_BPF"
|
|
"CAP_SYS_TTY_CONFIG"
|
|
"CAP_NET_ADMIN"
|
|
"CAP_NET_RAW"
|
|
];
|
|
in
|
|
{
|
|
ExecStart = "${getBin cfg.package}/sbin/pppd call ${peerCfg.name} nodetach nolog";
|
|
Restart = "always";
|
|
RestartSec = 5;
|
|
|
|
AmbientCapabilities = capabilities;
|
|
CapabilityBoundingSet = capabilities;
|
|
KeyringMode = "private";
|
|
LockPersonality = true;
|
|
MemoryDenyWriteExecute = true;
|
|
NoNewPrivileges = true;
|
|
PrivateMounts = true;
|
|
PrivateTmp = true;
|
|
ProtectControlGroups = true;
|
|
ProtectHome = true;
|
|
ProtectHostname = true;
|
|
ProtectKernelModules = true;
|
|
# pppd can be configured to tweak kernel settings.
|
|
ProtectKernelTunables = false;
|
|
ProtectSystem = "strict";
|
|
RemoveIPC = true;
|
|
RestrictAddressFamilies = [
|
|
"AF_ATMPVC"
|
|
"AF_ATMSVC"
|
|
"AF_INET"
|
|
"AF_INET6"
|
|
"AF_IPX"
|
|
"AF_NETLINK"
|
|
"AF_PACKET"
|
|
"AF_PPPOX"
|
|
"AF_UNIX"
|
|
];
|
|
RestrictNamespaces = true;
|
|
RestrictRealtime = true;
|
|
RestrictSUIDSGID = true;
|
|
SecureBits = "no-setuid-fixup-locked noroot-locked";
|
|
SystemCallFilter = "@system-service";
|
|
SystemCallArchitectures = "native";
|
|
|
|
# All pppd instances on a system must share a runtime
|
|
# directory in order for PPP multilink to work correctly. So
|
|
# we give all instances the same /run/pppd directory to store
|
|
# things in.
|
|
#
|
|
# For the same reason, we can't set PrivateUsers=true, because
|
|
# all instances need to run as the same user to access the
|
|
# multilink database.
|
|
RuntimeDirectory = "pppd";
|
|
RuntimeDirectoryPreserve = true;
|
|
};
|
|
wantedBy = mkIf peerCfg.autostart [ "multi-user.target" ];
|
|
};
|
|
};
|
|
|
|
etcFiles = listToAttrs (map mkEtc enabledConfigs);
|
|
systemdConfigs = listToAttrs (map mkSystemd enabledConfigs);
|
|
|
|
in mkIf cfg.enable {
|
|
environment.etc = etcFiles;
|
|
systemd.services = systemdConfigs;
|
|
};
|
|
}
|