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Support unix sockets via systemd #3

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Support unix sockets via systemd #3

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94 changes: 59 additions & 35 deletions piped-proxy/module.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -23,48 +23,72 @@ in
type = types.str;
};

listenPath = mkOption {
type = with types; nullOr str;
default = null;
example = "/run/piped-proxy/piped-proxy.sock";
description = "Path for listening on a unix socket. Enabling this ignores `listenAddress`";
};

package = mkOption {
default = self.packages."${pkgs.stdenv.system}".piped-proxy;
type = types.package;
};

};

config = mkIf cfg.enable {
systemd.services.piped-proxy = {
wantedBy = [ "multi-user.target" ];
serviceConfig = {
ExecStart = "${cfg.package}/bin/piped-proxy";
Environment = [ "BIND=${cfg.listenAddress}" ];
RuntimeDirectory = [ "%N" ];
WorkingDirectory = [ "%t/%N" ];
DynamicUser = true;
ProtectSystem = "strict";
ProtectHome = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectControlGroups = true;
ProtectKernelLogs = true;
ProtectHostname = true;
ProtectClock = true;
ProtectProc = "invisible";
ProcSubset = "pid";
PrivateTmp = true;
PrivateUsers = true;
PrivateDevices = true;
PrivateIPC = true;
MemoryDenyWriteExecute = true;
NoNewPrivileges = true;
CapabilityBoundingSet = "";
LockPersonality = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
RestrictNamespaces = true;
SystemCallArchitectures = "native";
SystemCallFilter = [ "@system-service" ];
SystemCallErrorNumber = "EPERM";
config =
let
useSocket = cfg.listenPath != null;
in
mkIf cfg.enable {

systemd.sockets.piped-proxy = mkIf useSocket {
wantedBy = [ "sockets.target" ];
socketConfig = {
ListenStream = cfg.listenPath;
};
};

systemd.services.piped-proxy = {
wantedBy = [ "multi-user.target" ];
wants = mkIf useSocket [ "piped-proxy.socket" ];
after = mkIf useSocket [ "piped-proxy.socket" ];
serviceConfig = {
ExecStart = "${cfg.package}/bin/piped-proxy";
Environment = (if useSocket then [ "FD_UNIX=0" ] else [ "BIND=${cfg.listenAddress}" ]);
RuntimeDirectory = [ "%N" ];
WorkingDirectory = [ "%t/%N" ];
DynamicUser = true;
ProtectSystem = "strict";
ProtectHome = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectControlGroups = true;
ProtectKernelLogs = true;
ProtectHostname = true;
ProtectClock = true;
ProtectProc = "invisible";
ProcSubset = "pid";
PrivateTmp = true;
PrivateUsers = true;
PrivateDevices = true;
PrivateIPC = true;
MemoryDenyWriteExecute = true;
NoNewPrivileges = true;
CapabilityBoundingSet = "";
LockPersonality = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
RestrictAddressFamilies = [
"AF_INET"
"AF_INET6"
];
RestrictNamespaces = true;
SystemCallArchitectures = "native";
SystemCallFilter = [ "@system-service" ];
SystemCallErrorNumber = "EPERM";
};
};
};
};
}