package ss

import (
	"net"

	"github.com/snail007/goproxy/utils"
)

const leakyBufSize = 4108 // data.len(2) + hmacsha1(10) + data(4096)
const maxNBuf = 2048

var leakyBuf = utils.NewLeakyBuf(maxNBuf, leakyBufSize)

const (
	idType  = 0 // address type index
	idIP0   = 1 // ip addres start index
	idDmLen = 1 // domain address length index
	idDm0   = 2 // domain address start index

	typeIPv4 = 1 // type is ipv4 address
	typeDm   = 3 // type is domain address
	typeIPv6 = 4 // type is ipv6 address

	lenIPv4     = net.IPv4len + 2 // ipv4 + 2port
	lenIPv6     = net.IPv6len + 2 // ipv6 + 2port
	lenDmBase   = 2               // 1addrLen + 2port, plus addrLen
	lenHmacSha1 = 10
)