From 95ed5a5ff8501554af5fbf2977f41eeea2303bac Mon Sep 17 00:00:00 2001
From: Darien Raymond <admin@v2ray.com>
Date: Sat, 23 Feb 2019 00:01:23 +0100
Subject: [PATCH] comments

---
 app/dns/nameserver.go            | 4 ++++
 common/crypto/aes.go             | 2 ++
 transport/internet/kcp/dialer.go | 1 +
 3 files changed, 7 insertions(+)

diff --git a/app/dns/nameserver.go b/app/dns/nameserver.go
index b26c21ff..123336e7 100644
--- a/app/dns/nameserver.go
+++ b/app/dns/nameserver.go
@@ -15,8 +15,12 @@ type IPOption struct {
 	IPv6Enable bool
 }
 
+// Client is the interface for DNS client.
 type Client interface {
+	// Name of the Client.
 	Name() string
+
+	// QueryIP sends IP queries to its configured server.
 	QueryIP(ctx context.Context, domain string, option IPOption) ([]net.IP, error)
 }
 
diff --git a/common/crypto/aes.go b/common/crypto/aes.go
index 94a49735..b2415b3e 100644
--- a/common/crypto/aes.go
+++ b/common/crypto/aes.go
@@ -25,10 +25,12 @@ func NewAesStreamMethod(key []byte, iv []byte, f func(cipher.Block, []byte) ciph
 	return f(aesBlock, iv)
 }
 
+// NewAesCTRStream creates a stream cipher based on AES-CTR.
 func NewAesCTRStream(key []byte, iv []byte) cipher.Stream {
 	return NewAesStreamMethod(key, iv, cipher.NewCTR)
 }
 
+// NewAesGcm creates a AEAD cipher based on AES-GCM.
 func NewAesGcm(key []byte) cipher.AEAD {
 	block, err := aes.NewCipher(key)
 	common.Must(err)
diff --git a/transport/internet/kcp/dialer.go b/transport/internet/kcp/dialer.go
index 55b3922f..b0531b50 100644
--- a/transport/internet/kcp/dialer.go
+++ b/transport/internet/kcp/dialer.go
@@ -47,6 +47,7 @@ func fetchInput(ctx context.Context, input io.Reader, reader PacketReader, conn
 	}
 }
 
+// DialKCP dials a new KCP connections to the specific destination.
 func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
 	dest.Network = net.Network_UDP
 	newError("dialing mKCP to ", dest).WriteToLog()