proxyutil

package

v0.49.0 Latest Latest Go to latest Published: Apr 13, 2023 License: Apache-2.0 Imports: 9 Imported by: 4

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Valid go.mod file
Redistributable license
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Repository

github.com/AdguardTeam/dnsproxy

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Documentation ¶

Overview ¶

Package proxyutil contains helper functions that are used in all other dnsproxy packages

Index ¶

Constants
func AddPrefix(b []byte) (m []byte)
func AppendIPAddrs(ipAddrs *[]net.IPAddr, answers []dns.RR)
func ContainsIP(nets []*net.IPNet, ip net.IP) (ok bool)
func DNSSize(isUDP bool, r *dns.Msg) int
func IPFromRR(rr dns.RR) (ip net.IP)
func ReadPrefixed(conn net.Conn) ([]byte, error)
func SortIPAddrs(ipAddrs []net.IPAddr) []net.IPAddrdeprecated
func UDPGetOOBSize() (oobSize int)deprecated
func UDPRead(c *net.UDPConn, buf []byte, udpOOBSize int) (n int, localIP net.IP, remoteAddr *net.UDPAddr, err error)deprecated
func UDPSetOptions(c *net.UDPConn) (err error)deprecated
func UDPWrite(data []byte, conn *net.UDPConn, remoteAddr *net.UDPAddr, localIP net.IP) (n int, err error)deprecated
func WritePrefixed(b []byte, conn net.Conn) error

Constants ¶

View Source

const ErrTooLarge errors.Error = "dns message is too large"

ErrTooLarge means that a DNS message is larger than 64KiB.

Variables ¶

This section is empty.

Functions ¶

func AddPrefix ¶ added in v0.43.0

func AddPrefix(b []byte) (m []byte)

AddPrefix adds a 2-byte prefix with the DNS message length.

func AppendIPAddrs ¶

func AppendIPAddrs(ipAddrs *[]net.IPAddr, answers []dns.RR)

AppendIPAddrs appends the IP addresses got from dns.RR to the specified array

func ContainsIP ¶ added in v0.28.0

func ContainsIP(nets []*net.IPNet, ip net.IP) (ok bool)

ContainsIP returns true if any of nets contains ip.

func DNSSize ¶ added in v0.33.0

func DNSSize(isUDP bool, r *dns.Msg) int

DNSSize returns if buffer size *advertised* in the requests OPT record. Or when the request was over TCP, we return the maximum allowed size of 64K.

func IPFromRR ¶ added in v0.41.0

func IPFromRR(rr dns.RR) (ip net.IP)

IPFromRR returns the IP address from rr if any.

func ReadPrefixed ¶ added in v0.33.0

func ReadPrefixed(conn net.Conn) ([]byte, error)

ReadPrefixed reads a DNS message with a 2-byte prefix containing message length from conn.

func SortIPAddrs deprecated

func SortIPAddrs(ipAddrs []net.IPAddr) []net.IPAddr

SortIPAddrs sorts the specified IP addresses array IPv4 addresses go first, then IPv6 addresses

Deprecated: This function is deprecated. Packages in module dnsproxy should use internal/netutil.SortIPAddrs instead.

func UDPGetOOBSize deprecated added in v0.33.0

func UDPGetOOBSize() (oobSize int)

UDPGetOOBSize returns maximum size of the received OOB data.

Deprecated: This function is deprecated. Packages in module dnsproxy should use internal/netutil.UDPGetOOBSize instead.

func UDPRead deprecated added in v0.33.0

func UDPRead(
	c *net.UDPConn,
	buf []byte,
	udpOOBSize int,
) (n int, localIP net.IP, remoteAddr *net.UDPAddr, err error)

UDPRead udpRead reads the message from c using buf receives payload of size udpOOBSize from the UDP socket. It returns the number of bytes copied into buf, the number of bytes copied with OOB and the source address of the message.

Deprecated: This function is deprecated. Packages in module dnsproxy should use internal/netutil.UDPRead instead.

func UDPSetOptions deprecated added in v0.33.0

func UDPSetOptions(c *net.UDPConn) (err error)

UDPSetOptions sets flag options on a UDP socket to be able to receive the necessary OOB data.

Deprecated: This function is deprecated. Packages in module dnsproxy should use internal/netutil.UDPSetOptions instead.

func UDPWrite deprecated added in v0.33.0

func UDPWrite(
	data []byte,
	conn *net.UDPConn,
	remoteAddr *net.UDPAddr,
	localIP net.IP,
) (n int, err error)

UDPWrite writes the data to the remoteAddr using conn.

Deprecated: This function is deprecated. Packages in module dnsproxy should use internal/netutil.UDPWrite instead.

func WritePrefixed ¶ added in v0.33.0

func WritePrefixed(b []byte, conn net.Conn) error

WritePrefixed writes a DNS message to a TCP connection it first writes a 2-byte prefix followed by the message itself.

Types ¶

This section is empty.

Source Files ¶

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