Chore: make the code more semantic

adapters/inbound/util.go

@@ -0,0 +1,71 @@
+package adapters
+
+import (
+	"net"
+	"net/http"
+	"strconv"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/go-shadowsocks2/socks"
+)
+
+func parseSocksAddr(target socks.Addr) *C.Metadata {
+	var host, port string
+	var ip net.IP
+
+	switch target[0] {
+	case socks.AtypDomainName:
+		host = string(target[2 : 2+target[1]])
+		port = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
+		ipAddr, err := net.ResolveIPAddr("ip", host)
+		if err == nil {
+			ip = ipAddr.IP
+		}
+	case socks.AtypIPv4:
+		ip = net.IP(target[1 : 1+net.IPv4len])
+		port = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
+	case socks.AtypIPv6:
+		ip = net.IP(target[1 : 1+net.IPv6len])
+		port = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
+	}
+
+	return &C.Metadata{
+		NetWork:  C.TCP,
+		AddrType: int(target[0]),
+		Host:     host,
+		IP:       &ip,
+		Port:     port,
+	}
+}
+
+func parseHTTPAddr(request *http.Request) *C.Metadata {
+	host := request.URL.Hostname()
+	port := request.URL.Port()
+	if port == "" {
+		port = "80"
+	}
+	ipAddr, err := net.ResolveIPAddr("ip", host)
+	var resolveIP *net.IP
+	if err == nil {
+		resolveIP = &ipAddr.IP
+	}
+
+	var addType int
+	ip := net.ParseIP(host)
+	switch {
+	case ip == nil:
+		addType = socks.AtypDomainName
+	case ip.To4() == nil:
+		addType = socks.AtypIPv6
+	default:
+		addType = socks.AtypIPv4
+	}
+
+	return &C.Metadata{
+		NetWork:  C.TCP,
+		AddrType: addType,
+		Host:     host,
+		IP:       resolveIP,
+		Port:     port,
+	}
+}