146 lines
3.3 KiB
Go
146 lines
3.3 KiB
Go
package adapters
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import (
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"bufio"
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"bytes"
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"net"
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"net/http"
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"strconv"
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C "github.com/Dreamacro/clash/constant"
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"github.com/riobard/go-shadowsocks2/socks"
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)
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func parseSocksAddr(target socks.Addr) *C.Addr {
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var host, port string
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var ip net.IP
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switch target[0] {
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case socks.AtypDomainName:
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host = string(target[2 : 2+target[1]])
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port = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
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ipAddr, err := net.ResolveIPAddr("ip", host)
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if err == nil {
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ip = ipAddr.IP
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}
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case socks.AtypIPv4:
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ip = net.IP(target[1 : 1+net.IPv4len])
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port = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
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case socks.AtypIPv6:
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ip = net.IP(target[1 : 1+net.IPv6len])
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port = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
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}
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return &C.Addr{
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NetWork: C.TCP,
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AddrType: int(target[0]),
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Host: host,
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IP: &ip,
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Port: port,
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}
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}
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func parseHTTPAddr(request *http.Request) *C.Addr {
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host := request.URL.Hostname()
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port := request.URL.Port()
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if port == "" {
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port = "80"
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}
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ipAddr, err := net.ResolveIPAddr("ip", host)
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var resolveIP *net.IP
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if err == nil {
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resolveIP = &ipAddr.IP
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}
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var addType int
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ip := net.ParseIP(host)
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switch {
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case ip == nil:
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addType = socks.AtypDomainName
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case ip.To4() == nil:
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addType = socks.AtypIPv6
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default:
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addType = socks.AtypIPv4
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}
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return &C.Addr{
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NetWork: C.TCP,
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AddrType: addType,
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Host: host,
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IP: resolveIP,
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Port: port,
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}
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}
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// ParserHTTPHostHeader returns the HTTP Host header from br without
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// consuming any of its bytes. It returns "" if it can't find one.
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func ParserHTTPHostHeader(br *bufio.Reader) (method, host string) {
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// br := bufio.NewReader(bytes.NewReader(data))
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const maxPeek = 4 << 10
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peekSize := 0
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for {
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peekSize++
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if peekSize > maxPeek {
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b, _ := br.Peek(br.Buffered())
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return method, httpHostHeaderFromBytes(b)
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}
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b, err := br.Peek(peekSize)
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if n := br.Buffered(); n > peekSize {
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b, _ = br.Peek(n)
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peekSize = n
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}
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if len(b) > 0 {
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if b[0] < 'A' || b[0] > 'Z' {
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// Doesn't look like an HTTP verb
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// (GET, POST, etc).
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return
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}
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if bytes.Index(b, crlfcrlf) != -1 || bytes.Index(b, lflf) != -1 {
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println(string(b))
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req, err := http.ReadRequest(bufio.NewReader(bytes.NewReader(b)))
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if err != nil {
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return
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}
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if len(req.Header["Host"]) > 1 {
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// TODO(bradfitz): what does
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// ReadRequest do if there are
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// multiple Host headers?
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return
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}
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println(req.Host)
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return req.Method, req.Host
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}
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}
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if err != nil {
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return method, httpHostHeaderFromBytes(b)
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}
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}
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}
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var (
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lfHostColon = []byte("\nHost:")
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lfhostColon = []byte("\nhost:")
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crlf = []byte("\r\n")
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lf = []byte("\n")
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crlfcrlf = []byte("\r\n\r\n")
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lflf = []byte("\n\n")
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)
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func httpHostHeaderFromBytes(b []byte) string {
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if i := bytes.Index(b, lfHostColon); i != -1 {
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return string(bytes.TrimSpace(untilEOL(b[i+len(lfHostColon):])))
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}
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if i := bytes.Index(b, lfhostColon); i != -1 {
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return string(bytes.TrimSpace(untilEOL(b[i+len(lfhostColon):])))
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}
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return ""
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}
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// untilEOL returns v, truncated before the first '\n' byte, if any.
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// The returned slice may include a '\r' at the end.
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func untilEOL(v []byte) []byte {
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if i := bytes.IndexByte(v, '\n'); i != -1 {
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return v[:i]
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}
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return v
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}
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