clash/adapter/inbound/util.go
2023-08-09 13:51:02 +08:00

90 lines
2.1 KiB
Go

package inbound
import (
"errors"
"net"
"net/http"
"net/netip"
"strconv"
"strings"
"github.com/Dreamacro/clash/common/nnip"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/transport/socks5"
)
func parseSocksAddr(target socks5.Addr) *C.Metadata {
metadata := &C.Metadata{}
switch target[0] {
case socks5.AtypDomainName:
// trim for FQDN
metadata.Host = strings.TrimRight(string(target[2:2+target[1]]), ".")
metadata.DstPort = uint16((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
case socks5.AtypIPv4:
metadata.DstIP = nnip.IpToAddr(net.IP(target[1 : 1+net.IPv4len]))
metadata.DstPort = uint16((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
case socks5.AtypIPv6:
ip6, _ := netip.AddrFromSlice(target[1 : 1+net.IPv6len])
metadata.DstIP = ip6.Unmap()
metadata.DstPort = uint16((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
}
return metadata
}
func parseHTTPAddr(request *http.Request) *C.Metadata {
host := request.URL.Hostname()
port := request.URL.Port()
if port == "" {
port = "80"
}
// trim FQDN (#737)
host = strings.TrimRight(host, ".")
var uint16Port uint16
if port, err := strconv.ParseUint(port, 10, 16); err == nil {
uint16Port = uint16(port)
}
metadata := &C.Metadata{
NetWork: C.TCP,
Host: host,
DstIP: netip.Addr{},
DstPort: uint16Port,
}
ip, err := netip.ParseAddr(host)
if err == nil {
metadata.DstIP = ip
}
return metadata
}
func parseAddr(addr net.Addr) (netip.Addr, uint16, error) {
// Filter when net.Addr interface is nil
if addr == nil {
return netip.Addr{}, 0, errors.New("nil addr")
}
if rawAddr, ok := addr.(interface{ RawAddr() net.Addr }); ok {
ip, port, err := parseAddr(rawAddr.RawAddr())
if err == nil {
return ip, port, err
}
}
addrStr := addr.String()
host, port, err := net.SplitHostPort(addrStr)
if err != nil {
return netip.Addr{}, 0, err
}
var uint16Port uint16
if port, err := strconv.ParseUint(port, 10, 16); err == nil {
uint16Port = uint16(port)
}
ip, err := netip.ParseAddr(host)
return ip, uint16Port, err
}