mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-22 16:41:30 +00:00
123 lines
2.6 KiB
Go
123 lines
2.6 KiB
Go
package process
|
|
|
|
import (
|
|
"context"
|
|
"encoding/binary"
|
|
"net/netip"
|
|
"os"
|
|
"syscall"
|
|
"unsafe"
|
|
|
|
N "github.com/sagernet/sing/common/network"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
var _ Searcher = (*darwinSearcher)(nil)
|
|
|
|
type darwinSearcher struct{}
|
|
|
|
func NewSearcher(_ Config) (Searcher, error) {
|
|
return &darwinSearcher{}, nil
|
|
}
|
|
|
|
func (d *darwinSearcher) FindProcessInfo(ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
|
|
processName, err := findProcessName(network, source.Addr(), int(source.Port()))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &Info{ProcessPath: processName, UserId: -1}, nil
|
|
}
|
|
|
|
func findProcessName(network string, ip netip.Addr, port int) (string, error) {
|
|
var spath string
|
|
switch network {
|
|
case N.NetworkTCP:
|
|
spath = "net.inet.tcp.pcblist_n"
|
|
case N.NetworkUDP:
|
|
spath = "net.inet.udp.pcblist_n"
|
|
default:
|
|
return "", os.ErrInvalid
|
|
}
|
|
|
|
isIPv4 := ip.Is4()
|
|
|
|
value, err := syscall.Sysctl(spath)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
buf := []byte(value)
|
|
|
|
// from darwin-xnu/bsd/netinet/in_pcblist.c:get_pcblist_n
|
|
// size/offset are round up (aligned) to 8 bytes in darwin
|
|
// rup8(sizeof(xinpcb_n)) + rup8(sizeof(xsocket_n)) +
|
|
// 2 * rup8(sizeof(xsockbuf_n)) + rup8(sizeof(xsockstat_n))
|
|
itemSize := 384
|
|
if network == N.NetworkTCP {
|
|
// rup8(sizeof(xtcpcb_n))
|
|
itemSize += 208
|
|
}
|
|
// skip the first xinpgen(24 bytes) block
|
|
for i := 24; i+itemSize <= len(buf); i += itemSize {
|
|
// offset of xinpcb_n and xsocket_n
|
|
inp, so := i, i+104
|
|
|
|
srcPort := binary.BigEndian.Uint16(buf[inp+18 : inp+20])
|
|
if uint16(port) != srcPort {
|
|
continue
|
|
}
|
|
|
|
// xinpcb_n.inp_vflag
|
|
flag := buf[inp+44]
|
|
|
|
var srcIP netip.Addr
|
|
switch {
|
|
case flag&0x1 > 0 && isIPv4:
|
|
// ipv4
|
|
srcIP = netip.AddrFrom4(*(*[4]byte)(buf[inp+76 : inp+80]))
|
|
case flag&0x2 > 0 && !isIPv4:
|
|
// ipv6
|
|
srcIP = netip.AddrFrom16(*(*[16]byte)(buf[inp+64 : inp+80]))
|
|
default:
|
|
continue
|
|
}
|
|
|
|
if ip != srcIP {
|
|
continue
|
|
}
|
|
|
|
// xsocket_n.so_last_pid
|
|
pid := readNativeUint32(buf[so+68 : so+72])
|
|
return getExecPathFromPID(pid)
|
|
}
|
|
|
|
return "", ErrNotFound
|
|
}
|
|
|
|
func getExecPathFromPID(pid uint32) (string, error) {
|
|
const (
|
|
procpidpathinfo = 0xb
|
|
procpidpathinfosize = 1024
|
|
proccallnumpidinfo = 0x2
|
|
)
|
|
buf := make([]byte, procpidpathinfosize)
|
|
_, _, errno := syscall.Syscall6(
|
|
syscall.SYS_PROC_INFO,
|
|
proccallnumpidinfo,
|
|
uintptr(pid),
|
|
procpidpathinfo,
|
|
0,
|
|
uintptr(unsafe.Pointer(&buf[0])),
|
|
procpidpathinfosize)
|
|
if errno != 0 {
|
|
return "", errno
|
|
}
|
|
|
|
return unix.ByteSliceToString(buf), nil
|
|
}
|
|
|
|
func readNativeUint32(b []byte) uint32 {
|
|
return *(*uint32)(unsafe.Pointer(&b[0]))
|
|
}
|