diff --git a/common/net/address.go b/common/net/address.go
index 639198bc..77e837ce 100644
--- a/common/net/address.go
+++ b/common/net/address.go
@@ -7,15 +7,16 @@ import (
 	"github.com/v2ray/v2ray-core/common/log"
 )
 
-// Address represents a network address to be communicated with. It may be an IP address or domain address, not both. This interface doesn't resolve IP address for a given domain.
+// Address represents a network address to be communicated with. It may be an IP address or domain
+// address, not both. This interface doesn't resolve IP address for a given domain.
 type Address interface {
-	IP() net.IP // IP of this Address
-	Domain() string // Domain of this Address
-	Port() uint16 // Port of this Address
+	IP() net.IP        // IP of this Address
+	Domain() string    // Domain of this Address
+	Port() uint16      // Port of this Address
 	PortBytes() []byte // Port in bytes, network byte order
 
-	IsIPv4() bool // True if this Address is an IPv4 address
-	IsIPv6() bool // True if this Address is an IPv6 address
+	IsIPv4() bool   // True if this Address is an IPv4 address
+	IsIPv6() bool   // True if this Address is an IPv6 address
 	IsDomain() bool // True if this Address is an domain address
 
 	String() string // String representation of this Address
@@ -32,10 +33,12 @@ func IPAddress(ip []byte, port uint16) Address {
 	case net.IPv6len:
 		return IPv6Address{
 			PortAddress: PortAddress{port: port},
-			ip:          [16]byte{ip[0], ip[1], ip[2], ip[3],
-			                      ip[4], ip[5], ip[6], ip[7],
-			                      ip[8], ip[9], ip[10], ip[11],
-			                      ip[12], ip[13], ip[14], ip[15]},
+			ip: [16]byte{
+				ip[0], ip[1], ip[2], ip[3],
+				ip[4], ip[5], ip[6], ip[7],
+				ip[8], ip[9], ip[10], ip[11],
+				ip[12], ip[13], ip[14], ip[15],
+			},
 		}
 	default:
 		panic(log.Error("Unknown IP format: %v", ip))
diff --git a/common/net/destination.go b/common/net/destination.go
index d9626645..f495f05f 100644
--- a/common/net/destination.go
+++ b/common/net/destination.go
@@ -1,18 +1,21 @@
 package net
 
+// Destination represents a network destination including address and protocol (tcp / udp).
 type Destination interface {
-	Network() string
-	Address() Address
-	String() string
+	Network() string  // Protocol of communication (tcp / udp)
+	Address() Address // Address of destination
+	String() string   // String representation of the destination
 
-	IsTCP() bool
-	IsUDP() bool
+	IsTCP() bool // True if destination is reachable via TCP
+	IsUDP() bool // True if destination is reachable via UDP
 }
 
+// NewTCPDestination creates a TCP destination with given address
 func NewTCPDestination(address Address) Destination {
 	return TCPDestination{address: address}
 }
 
+// NewUDPDestination creates a UDP destination with given address
 func NewUDPDestination(address Address) Destination {
 	return UDPDestination{address: address}
 }
diff --git a/common/net/transport.go b/common/net/transport.go
index a4b66797..d98f9d11 100644
--- a/common/net/transport.go
+++ b/common/net/transport.go
@@ -8,6 +8,7 @@ const (
 	bufferSize = 32 * 1024
 )
 
+// ReaderToChan dumps all content from a given reader to a chan by constantly reading it until EOF.
 func ReaderToChan(stream chan<- []byte, reader io.Reader) error {
 	for {
 		buffer := make([]byte, bufferSize)
@@ -21,6 +22,7 @@ func ReaderToChan(stream chan<- []byte, reader io.Reader) error {
 	}
 }
 
+// ChanToWriter dumps all content from a given chan to a writer until the chan is closed.
 func ChanToWriter(writer io.Writer, stream <-chan []byte) error {
 	for buffer := range stream {
 		_, err := writer.Write(buffer)