disable process name on android
This commit is contained in:
gVisor bot
parent
d069d56860
commit
0042b5de3b
3 changed files with 4 additions and 232 deletions
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@ -3,6 +3,7 @@ package process
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import (
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"errors"
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"net"
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"runtime"
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C "github.com/Dreamacro/clash/constant"
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)
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@ -23,6 +24,9 @@ func FindProcessName(network string, srcIP net.IP, srcPort int) (string, error)
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}
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func ShouldFindProcess(metadata *C.Metadata) bool {
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if runtime.GOOS == "android" {
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return false
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}
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if metadata.Process != "" {
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return false
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}
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@ -1,230 +0,0 @@
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package process
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"net"
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"os"
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"path"
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"path/filepath"
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"strings"
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"syscall"
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"unicode"
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"unsafe"
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"github.com/Dreamacro/clash/common/pool"
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)
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// from https://github.com/vishvananda/netlink/blob/bca67dfc8220b44ef582c9da4e9172bf1c9ec973/nl/nl_linux.go#L52-L62
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var nativeEndian = func() binary.ByteOrder {
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var x uint32 = 0x01020304
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if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
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return binary.BigEndian
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}
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return binary.LittleEndian
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}()
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const (
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sizeOfSocketDiagRequest = syscall.SizeofNlMsghdr + 8 + 48
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socketDiagByFamily = 20
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pathProc = "/proc"
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)
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func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
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inode, uid, err := resolveSocketByNetlink(network, ip, srcPort)
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if err != nil {
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return "", err
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}
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return resolveProcessNameByProcSearch(inode, uid)
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}
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func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int32, error) {
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var family byte
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var protocol byte
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switch network {
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case TCP:
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protocol = syscall.IPPROTO_TCP
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case UDP:
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protocol = syscall.IPPROTO_UDP
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default:
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return 0, 0, ErrInvalidNetwork
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}
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if ip.To4() != nil {
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family = syscall.AF_INET
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} else {
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family = syscall.AF_INET6
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}
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req := packSocketDiagRequest(family, protocol, ip, uint16(srcPort))
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socket, err := syscall.Socket(syscall.AF_NETLINK, syscall.SOCK_DGRAM, syscall.NETLINK_INET_DIAG)
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if err != nil {
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return 0, 0, fmt.Errorf("dial netlink: %w", err)
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}
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defer syscall.Close(socket)
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syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_SNDTIMEO, &syscall.Timeval{Usec: 100})
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syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_RCVTIMEO, &syscall.Timeval{Usec: 100})
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if err := syscall.Connect(socket, &syscall.SockaddrNetlink{
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Family: syscall.AF_NETLINK,
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Pad: 0,
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Pid: 0,
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Groups: 0,
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}); err != nil {
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return 0, 0, err
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}
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if _, err := syscall.Write(socket, req); err != nil {
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return 0, 0, fmt.Errorf("write request: %w", err)
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}
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rb := pool.Get(pool.RelayBufferSize)
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defer pool.Put(rb)
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n, err := syscall.Read(socket, rb)
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if err != nil {
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return 0, 0, fmt.Errorf("read response: %w", err)
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}
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messages, err := syscall.ParseNetlinkMessage(rb[:n])
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if err != nil {
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return 0, 0, fmt.Errorf("parse netlink message: %w", err)
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} else if len(messages) == 0 {
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return 0, 0, fmt.Errorf("unexcepted netlink response")
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}
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message := messages[0]
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if message.Header.Type&syscall.NLMSG_ERROR != 0 {
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return 0, 0, fmt.Errorf("netlink message: NLMSG_ERROR")
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}
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uid, inode := unpackSocketDiagResponse(&messages[0])
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if uid < 0 || inode < 0 {
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return 0, 0, fmt.Errorf("invalid uid(%d) or inode(%d)", uid, inode)
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}
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return uid, inode, nil
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}
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func packSocketDiagRequest(family, protocol byte, source net.IP, sourcePort uint16) []byte {
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s := make([]byte, 16)
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if v4 := source.To4(); v4 != nil {
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copy(s, v4)
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} else {
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copy(s, source)
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}
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buf := make([]byte, sizeOfSocketDiagRequest)
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nativeEndian.PutUint32(buf[0:4], sizeOfSocketDiagRequest)
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nativeEndian.PutUint16(buf[4:6], socketDiagByFamily)
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nativeEndian.PutUint16(buf[6:8], syscall.NLM_F_REQUEST|syscall.NLM_F_DUMP)
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nativeEndian.PutUint32(buf[8:12], 0)
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nativeEndian.PutUint32(buf[12:16], 0)
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buf[16] = family
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buf[17] = protocol
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buf[18] = 0
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buf[19] = 0
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nativeEndian.PutUint32(buf[20:24], 0xFFFFFFFF)
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binary.BigEndian.PutUint16(buf[24:26], sourcePort)
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binary.BigEndian.PutUint16(buf[26:28], 0)
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copy(buf[28:44], s)
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copy(buf[44:60], net.IPv6zero)
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nativeEndian.PutUint32(buf[60:64], 0)
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nativeEndian.PutUint64(buf[64:72], 0xFFFFFFFFFFFFFFFF)
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return buf
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}
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func unpackSocketDiagResponse(msg *syscall.NetlinkMessage) (inode, uid int32) {
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if len(msg.Data) < 72 {
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return 0, 0
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}
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data := msg.Data
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uid = int32(nativeEndian.Uint32(data[64:68]))
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inode = int32(nativeEndian.Uint32(data[68:72]))
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return
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}
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func resolveProcessNameByProcSearch(inode, uid int32) (string, error) {
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files, err := os.ReadDir(pathProc)
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if err != nil {
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return "", err
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}
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buffer := make([]byte, syscall.PathMax)
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socket := []byte(fmt.Sprintf("socket:[%d]", inode))
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for _, f := range files {
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if !f.IsDir() || !isPid(f.Name()) {
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continue
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}
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info, err := f.Info()
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if err != nil {
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return "", err
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}
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if info.Sys().(*syscall.Stat_t).Uid != uint32(uid) {
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continue
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}
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processPath := path.Join(pathProc, f.Name())
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fdPath := path.Join(processPath, "fd")
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fds, err := os.ReadDir(fdPath)
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if err != nil {
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continue
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}
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for _, fd := range fds {
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n, err := syscall.Readlink(path.Join(fdPath, fd.Name()), buffer)
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if err != nil {
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continue
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}
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if bytes.Equal(buffer[:n], socket) {
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cmdline, err := os.ReadFile(path.Join(processPath, "cmdline"))
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if err != nil {
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return "", err
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}
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return splitCmdline(cmdline), nil
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}
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}
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}
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return "", fmt.Errorf("process of uid(%d),inode(%d) not found", uid, inode)
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}
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func splitCmdline(cmdline []byte) string {
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cmdline = bytes.Trim(cmdline, " ")
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idx := bytes.IndexFunc(cmdline, func(r rune) bool {
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return unicode.IsControl(r) || unicode.IsSpace(r)
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})
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if idx == -1 {
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return filepath.Base(string(cmdline))
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}
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return filepath.Base(string(cmdline[:idx]))
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}
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func isPid(s string) bool {
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return strings.IndexFunc(s, func(r rune) bool {
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return !unicode.IsDigit(r)
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}) == -1
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}
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@ -1,5 +1,3 @@
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//go:build !android
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package process
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import (
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