Feature: support PROCESS-NAME on macOS

config/config.go

@@ -382,6 +382,10 @@ func parseRules(cfg *RawConfig, proxies map[string]C.Proxy) ([]C.Rule, error) {
 
 		parsed, parseErr := R.ParseRule(rule[0], payload, target, params)
 		if parseErr != nil {
+			if parseErr == R.ErrPlatformNotSupport {
+				log.Warnln("Rules[%d] [%s] don't support current OS, skip", idx, line)
+				continue
+			}
 			return nil, fmt.Errorf("Rules[%d] [%s] error: %s", idx, line, parseErr.Error())
 		}
 

constant/rule.go

@@ -10,6 +10,7 @@ const (
 	SrcIPCIDR
 	SrcPort
 	DstPort
+	Process
 	MATCH
 )
 
@@ -33,6 +34,8 @@ func (rt RuleType) String() string {
 		return "SrcPort"
 	case DstPort:
 		return "DstPort"
+	case Process:
+		return "Process"
 	case MATCH:
 		return "Match"
 	default:

rules/base.go

@@ -5,8 +5,9 @@ import (
 )
 
 var (
-	errPayload = errors.New("payload error")
-	errParams  = errors.New("params error")
+	errPayload            = errors.New("payload error")
+	errParams             = errors.New("params error")
+	ErrPlatformNotSupport = errors.New("not support on this platform")
 
 	noResolve = "no-resolve"
 )

rules/parser.go

@@ -31,6 +31,8 @@ func ParseRule(tp, payload, target string, params []string) (C.Rule, error) {
 		parsed, parseErr = NewPort(payload, target, true)
 	case "DST-PORT":
 		parsed, parseErr = NewPort(payload, target, false)
+	case "PROCESS-NAME":
+		parsed, parseErr = NewProcess(payload, target)
 	case "MATCH":
 		parsed = NewMatch(target)
 	default:

rules/process_darwin.go

@@ -0,0 +1,171 @@
+package rules
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"net"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
+)
+
+type Process struct {
+	adapter string
+	process string
+}
+
+func (ps *Process) RuleType() C.RuleType {
+	return C.Process
+}
+
+func (ps *Process) Match(metadata *C.Metadata) bool {
+	name, err := getExecPathFromAddress(metadata.SrcIP, metadata.SrcPort, metadata.NetWork == C.TCP)
+	if err != nil {
+		log.Debugln("[%s] getExecPathFromAddress error: %s", C.Process.String(), err.Error())
+		return false
+	}
+
+	return strings.ToLower(name) == ps.process
+}
+
+func (p *Process) Adapter() string {
+	return p.adapter
+}
+
+func (p *Process) Payload() string {
+	return p.process
+}
+
+func (p *Process) NoResolveIP() bool {
+	return true
+}
+
+func NewProcess(process string, adapter string) (*Process, error) {
+	return &Process{
+		adapter: adapter,
+		process: process,
+	}, nil
+}
+
+const (
+	procpidpathinfo     = 0xb
+	procpidpathinfosize = 1024
+	proccallnumpidinfo  = 0x2
+)
+
+func getExecPathFromPID(pid uint32) (string, error) {
+	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
+	}
+	firstZero := bytes.IndexByte(buf, 0)
+	if firstZero <= 0 {
+		return "", nil
+	}
+
+	return filepath.Base(string(buf[:firstZero])), nil
+}
+
+func getExecPathFromAddress(ip net.IP, portStr string, isTCP bool) (string, error) {
+	port, err := strconv.Atoi(portStr)
+	if err != nil {
+		return "", err
+	}
+
+	spath := "net.inet.tcp.pcblist_n"
+	if !isTCP {
+		spath = "net.inet.udp.pcblist_n"
+	}
+
+	value, err := syscall.Sysctl(spath)
+	if err != nil {
+		return "", err
+	}
+
+	buf := []byte(value)
+
+	var kinds uint32 = 0
+	so, inp := 0, 0
+	for i := roundUp8(xinpgenSize(buf)); i < uint32(len(buf)) && xinpgenSize(buf[i:]) > 24; i += roundUp8(xinpgenSize(buf[i:])) {
+		thisKind := binary.LittleEndian.Uint32(buf[i+4 : i+8])
+		if kinds&thisKind == 0 {
+			kinds |= thisKind
+			switch thisKind {
+			case 0x1:
+				// XSO_SOCKET
+				so = int(i)
+			case 0x10:
+				// XSO_INPCB
+				inp = int(i)
+			default:
+				break
+			}
+		}
+
+		// all blocks needed by tcp/udp
+		if (isTCP && kinds != 0x3f) || (!isTCP && kinds != 0x1f) {
+			continue
+		}
+		kinds = 0
+
+		// xsocket_n.xso_protocol
+		proto := binary.LittleEndian.Uint32(buf[so+36 : so+40])
+		if proto != syscall.IPPROTO_TCP && proto != syscall.IPPROTO_UDP {
+			continue
+		}
+
+		srcPort := binary.BigEndian.Uint16(buf[inp+18 : inp+20])
+		if uint16(port) != srcPort {
+			continue
+		}
+
+		// xinpcb_n.inp_vflag
+		flag := buf[inp+44]
+
+		var srcIP net.IP
+		if flag&0x1 > 0 {
+			// ipv4
+			srcIP = net.IP(buf[inp+76 : inp+80])
+		} else if flag&0x2 > 0 {
+			// ipv6
+			srcIP = net.IP(buf[inp+64 : inp+80])
+		} else {
+			continue
+		}
+
+		if !ip.Equal(srcIP) {
+			continue
+		}
+
+		// xsocket_n.so_last_pid
+		pid := binary.LittleEndian.Uint32(buf[so+68 : so+72])
+		return getExecPathFromPID(pid)
+	}
+
+	return "", errors.New("process not found")
+}
+
+func xinpgenSize(b []byte) uint32 {
+	return binary.LittleEndian.Uint32(b[:4])
+}
+
+func roundUp8(n uint32) uint32 {
+	if n == 0 {
+		return uint32(8)
+	}
+	return (n + 7) & ((^uint32(8)) + 1)
+}

rules/process_other.go

@@ -0,0 +1,11 @@
+// +build !darwin
+
+package rules
+
+import (
+	C "github.com/Dreamacro/clash/constant"
+)
+
+func NewProcess(process string, adapter string) (C.Rule, error) {
+	return nil, ErrPlatformNotSupport
+}