utils

Documentation

Index

• Constants
• func ReadMsgFromTCP(c io.Reader) (m *dns.Msg, n int, err error)
• func ReadMsgFromUDP(c io.Reader, bufSize int) (m *dns.Msg, n int, err error)
• func ReadUDPMsgFrom(c net.PacketConn, bufSize int) (m *dns.Msg, from net.Addr, n int, err error)
• func WriteMsgToTCP(c io.Writer, m *dns.Msg) (n int, err error)
• func WriteMsgToUDP(c io.Writer, m *dns.Msg) (n int, err error)
• func WriteRawMsgToTCP(c io.Writer, b []byte) (n int, err error)
• func WriteRawMsgToUDP(c io.Writer, b []byte) (n int, err error)
• func WriteUDPMsgTo(m *dns.Msg, c net.PacketConn, to net.Addr) (n int, err error)

Constants

const (
	IPv4UdpMaxPayload = 1472 // MTU 1500 - 20 IPv4 header - 8 udp header
	IPv6UdpMaxPayload = 1452 // MTU 1500 - 40 IPv6 header - 8 udp header
)

Functions

func ReadMsgFromTCP

func ReadMsgFromTCP(c io.Reader) (m *dns.Msg, n int, err error)

ReadMsgFromTCP reads msg from a tcp connection. brokenDataLeft indicates the frame size which have not be read from c. if brokenDataLeft is unknownBrokenDataSize(-1), c should not be reused anymore. n represents how many bytes are read from c.

func ReadMsgFromUDP

func ReadMsgFromUDP(c io.Reader, bufSize int) (m *dns.Msg, n int, err error)

func ReadUDPMsgFrom

func ReadUDPMsgFrom(c net.PacketConn, bufSize int) (m *dns.Msg, from net.Addr, n int, err error)

func WriteMsgToTCP

func WriteMsgToTCP(c io.Writer, m *dns.Msg) (n int, err error)

WriteMsgToTCP writes m to c. n represents how many bytes are wrote to c. This includes 2 bytes tcp length header.

func WriteMsgToUDP

func WriteMsgToUDP(c io.Writer, m *dns.Msg) (n int, err error)

func WriteRawMsgToTCP

func WriteRawMsgToTCP(c io.Writer, b []byte) (n int, err error)

WriteRawMsgToTCP writes b to c. n represents how many bytes are wrote to c. This includes 2 bytes tcp length header.

func WriteRawMsgToUDP

func WriteRawMsgToUDP(c io.Writer, b []byte) (n int, err error)

func WriteUDPMsgTo

func WriteUDPMsgTo(m *dns.Msg, c net.PacketConn, to net.Addr) (n int, err error)