Documentation
¶
Overview ¶
Package proxyutil contains helper functions that are used in all other dnsproxy packages
Index ¶
- Variables
- func AppendIPAddrs(ipAddrs *[]net.IPAddr, answers []dns.RR)
- func ContainsIP(ips []net.IP, ip net.IP) bool
- func DNSSize(proto string, r *dns.Msg) int
- func GetIPFromDNSRecord(r dns.RR) net.IP
- func IsConnClosed(err error) bool
- func ReadPrefixed(conn net.Conn) ([]byte, error)
- func SortIPAddrs(ipAddrs []net.IPAddr) []net.IPAddr
- func UDPGetOOBSize() int
- func UDPRead(c *net.UDPConn, buf []byte, udpOOBSize int) (int, net.IP, *net.UDPAddr, error)
- func UDPSetOptions(c *net.UDPConn) error
- func UDPWrite(bytes []byte, conn *net.UDPConn, remoteAddr *net.UDPAddr, localIP net.IP) (int, error)
- func WritePrefixed(b []byte, conn net.Conn) error
Constants ¶
This section is empty.
Variables ¶
var ErrTooLarge = errors.New("DNS message is too large")
ErrTooLarge - DNS message is larger than 64kb
Functions ¶
func AppendIPAddrs ¶
AppendIPAddrs appends the IP addresses got from dns.RR to the specified array
func ContainsIP ¶ added in v0.28.0
ContainsIP checks if the specified IP is in the array
func DNSSize ¶ added in v0.33.0
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 GetIPFromDNSRecord ¶ added in v0.27.0
GetIPFromDNSRecord - extracts IP address for a DNS record returns null if the record is of a wrong type
func IsConnClosed ¶ added in v0.33.0
IsConnClosed - checks if the error signals of a closed server connecting
func ReadPrefixed ¶ added in v0.33.0
ReadPrefixed -- reads a DNS message with a 2-byte prefix containing message length
func SortIPAddrs ¶
SortIPAddrs sorts the specified IP addresses array IPv4 addresses go first, then IPv6 addresses
func UDPGetOOBSize ¶ added in v0.33.0
func UDPGetOOBSize() int
UDPGetOOBSize - get max. size of received OOB data It will then be used in the ReadMsgUDP function
func UDPSetOptions ¶ added in v0.33.0
UDPSetOptions - set options on a UDP socket to be able to receive the necessary OOB data
Types ¶
This section is empty.
Source Files