server, service: added running as effective user

pkg/network/listen.go

@@ -0,0 +1,37 @@
+package network
+
+import (
+	"crypto/tls"
+	"net"
+)
+
+const protocol = "tcp"
+
+func CreateTLSListener(addrinfo string, x509cert, x509key []byte) (net.Listener, error) {
+	var listen net.Listener
+	var err error
+	tlsCert, err := tls.X509KeyPair(x509cert, x509key)
+	if err != nil {
+		return listen, err
+	}
+	tlsConfig := tls.Config{
+		Certificates:       []tls.Certificate{tlsCert},
+		ClientAuth:         tls.NoClientCert,
+		InsecureSkipVerify: true,
+	}
+	listen, err = tls.Listen(protocol, addrinfo, &tlsConfig)
+	if err != nil {
+		return listen, err
+	}
+	return listen, err
+}
+
+func CreateListener(addrinfo string) (net.Listener, error) {
+	var listen net.Listener
+	var err error
+	listen, err = net.Listen(protocol, addrinfo)
+	if err != nil {
+		return listen, err
+	}
+	return listen, err
+}