mirror of
https://github.com/XTLS/Xray-core.git
synced 2024-11-18 21:13:02 +00:00
59602db02d
* Add "tproxy" option
Added the function of "MacOS" FreeBSD firewall traffic forwarding and resolving destination address
example:
"inbounds": [
{
"listen": "127.0.0.1",
"port": 1122,
"protocol": "dokodemo-door",
"tag": "dokodemo",
"settings": {
"network": "tcp",
"followRedirect": true,
"userLevel": 0
},
"streamSettings": {
"sockopt": {
"tproxy": "pf"
}
}
}
]
* Add "tproxy" option
Added the function of "MacOS" FreeBSD firewall traffic forwarding and resolving destination address
example:
"inbounds": [
{
"listen": "127.0.0.1",
"port": 1122,
"protocol": "dokodemo-door",
"tag": "dokodemo",
"settings": {
"network": "tcp",
"followRedirect": true,
"userLevel": 0
},
"streamSettings": {
"sockopt": {
"tproxy": "pf"
}
}
}
]
* Add "tproxy" option
Added the function of "MacOS" FreeBSD firewall traffic forwarding and resolving destination address
example:
"inbounds": [
{
"listen": "127.0.0.1",
"port": 1122,
"protocol": "dokodemo-door",
"tag": "dokodemo",
"settings": {
"network": "tcp",
"followRedirect": true,
"userLevel": 0
},
"streamSettings": {
"sockopt": {
"tproxy": "pf"
}
}
}
]
Co-authored-by: Mocking <fanhaiwang0817@gmail.com>
95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
//go:build darwin
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package net
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import (
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"net"
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"os"
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"syscall"
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"unsafe"
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)
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const (
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PfOut = 2
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IOCOut = 0x40000000
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IOCIn = 0x80000000
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IOCInOut = IOCIn | IOCOut
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IOCPARMMask = 0x1FFF
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LEN = 4*16 + 4*4 + 4*1
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// #define _IOC(inout,group,num,len) (inout | ((len & IOCPARMMask) << 16) | ((group) << 8) | (num))
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// #define _IOWR(g,n,t) _IOC(IOCInOut, (g), (n), sizeof(t))
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// #define DIOCNATLOOK _IOWR('D', 23, struct pfioc_natlook)
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DIOCNATLOOK = IOCInOut | ((LEN & IOCPARMMask) << 16) | ('D' << 8) | 23
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)
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// OriginalDst uses ioctl to read original destination from /dev/pf
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func OriginalDst(conn Conn) (Destination, error) {
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f, err := os.Open("/dev/pf")
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if err != nil {
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return Destination{}, newError("failed to open device /dev/pf").Base(err)
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}
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defer f.Close()
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fd := f.Fd()
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nl := struct { // struct pfioc_natlook
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saddr, daddr, rsaddr, rdaddr [16]byte
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sxport, dxport, rsxport, rdxport [4]byte
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af, proto, protoVariant, direction uint8
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}{
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af: syscall.AF_INET,
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proto: syscall.IPPROTO_TCP,
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direction: PfOut,
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}
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var raIP, laIP net.IP
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var raPort, laPort int
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la := conn.LocalAddr()
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ra := conn.RemoteAddr()
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switch la.(type) {
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case *net.TCPAddr:
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raIP = ra.(*net.TCPAddr).IP
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laIP = la.(*net.TCPAddr).IP
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raPort = ra.(*net.TCPAddr).Port
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laPort = la.(*net.TCPAddr).Port
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case *net.UDPAddr:
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raIP = ra.(*net.UDPAddr).IP
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laIP = la.(*net.UDPAddr).IP
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raPort = ra.(*net.UDPAddr).Port
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laPort = la.(*net.UDPAddr).Port
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}
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if raIP.To4() != nil {
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if laIP.IsUnspecified() {
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laIP = net.ParseIP("127.0.0.1")
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}
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copy(nl.saddr[:net.IPv4len], raIP.To4())
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copy(nl.daddr[:net.IPv4len], laIP.To4())
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}
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if raIP.To16() != nil && raIP.To4() == nil {
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if laIP.IsUnspecified() {
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laIP = net.ParseIP("::1")
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}
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copy(nl.saddr[:], raIP)
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copy(nl.daddr[:], laIP)
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}
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nl.sxport[0], nl.sxport[1] = byte(raPort>>8), byte(raPort)
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nl.dxport[0], nl.dxport[1] = byte(laPort>>8), byte(laPort)
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if _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, fd, DIOCNATLOOK, uintptr(unsafe.Pointer(&nl))); errno != 0 {
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return Destination{}, os.NewSyscallError("ioctl", err)
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}
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odPort := nl.rdxport
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var odIP net.IP
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switch nl.af {
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case syscall.AF_INET:
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odIP = make(net.IP, net.IPv4len)
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copy(odIP, nl.rdaddr[:net.IPv4len])
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case syscall.AF_INET6:
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odIP = make(net.IP, net.IPv6len)
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copy(odIP, nl.rdaddr[:])
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}
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return Destination{
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Address: IPAddress(odIP),
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Port: PortFromBytes(odPort[:2]),
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Network: Network_TCP,
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}, nil
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}
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