mirror of
https://gitclone.com/github.com/MetaCubeX/Clash.Meta
synced 2024-11-14 21:31:16 +08:00
Refactor: linux process resolving (#2305)
This commit is contained in:
parent
4f291fa513
commit
6995e98181
@ -6,31 +6,57 @@ import (
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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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"github.com/mdlayher/netlink"
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"golang.org/x/sys/unix"
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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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SOCK_DIAG_BY_FAMILY = 20
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inetDiagRequestSize = int(unsafe.Sizeof(inetDiagRequest{}))
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inetDiagResponseSize = int(unsafe.Sizeof(inetDiagResponse{}))
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)
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type inetDiagRequest struct {
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Family byte
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Protocol byte
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Ext byte
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Pad byte
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States uint32
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SrcPort [2]byte
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DstPort [2]byte
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Src [16]byte
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Dst [16]byte
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If uint32
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Cookie [2]uint32
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}
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type inetDiagResponse struct {
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Family byte
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State byte
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Timer byte
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ReTrans byte
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SrcPort [2]byte
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DstPort [2]byte
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Src [16]byte
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Dst [16]byte
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If uint32
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Cookie [2]uint32
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Expires uint32
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RQueue uint32
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WQueue uint32
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UID uint32
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INode uint32
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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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@ -40,132 +66,73 @@ func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
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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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func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (uint32, uint32, error) {
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request := &inetDiagRequest{
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States: 0xffffffff,
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Cookie: [2]uint32{0xffffffff, 0xffffffff},
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}
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if ip.To4() != nil {
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family = syscall.AF_INET
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request.Family = unix.AF_INET
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} else {
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family = syscall.AF_INET6
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request.Family = unix.AF_INET6
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}
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req := packSocketDiagRequest(family, protocol, ip, uint16(srcPort))
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if strings.HasPrefix(network, "tcp") {
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request.Protocol = unix.IPPROTO_TCP
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} else if strings.HasPrefix(network, "udp") {
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request.Protocol = unix.IPPROTO_UDP
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} else {
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return 0, 0, ErrInvalidNetwork
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}
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socket, err := syscall.Socket(syscall.AF_NETLINK, syscall.SOCK_DGRAM, syscall.NETLINK_INET_DIAG)
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if v4 := ip.To4(); v4 != nil {
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copy(request.Src[:], v4)
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} else {
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copy(request.Src[:], ip)
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}
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binary.BigEndian.PutUint16(request.SrcPort[:], uint16(srcPort))
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conn, err := netlink.Dial(unix.NETLINK_INET_DIAG, nil)
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if err != nil {
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return 0, 0, fmt.Errorf("dial netlink: %w", err)
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return 0, 0, err
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}
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defer syscall.Close(socket)
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defer conn.Close()
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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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message := netlink.Message{
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Header: netlink.Header{
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Type: SOCK_DIAG_BY_FAMILY,
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Flags: netlink.Request | netlink.Dump,
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},
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Data: (*(*[inetDiagRequestSize]byte)(unsafe.Pointer(request)))[:],
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}
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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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messages, err := conn.Execute(message)
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if 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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for _, msg := range messages {
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if len(msg.Data) < inetDiagResponseSize {
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continue
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}
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response := (*inetDiagResponse)(unsafe.Pointer(&msg.Data[0]))
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return response.INode, response.UID, nil
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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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inode, uid := unpackSocketDiagResponse(&messages[0])
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if inode < 0 || uid < 0 {
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return 0, 0, fmt.Errorf("invalid inode(%d) or uid(%d)", inode, uid)
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}
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return inode, uid, nil
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return 0, 0, ErrNotFound
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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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func resolveProcessNameByProcSearch(inode, uid uint32) (string, error) {
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files, err := os.ReadDir("/proc")
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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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buffer := make([]byte, unix.PathMax)
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socket := fmt.Appendf(nil, "socket:[%d]", inode)
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for _, f := range files {
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@ -177,12 +144,12 @@ func resolveProcessNameByProcSearch(inode, uid int32) (string, error) {
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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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if info.Sys().(*syscall.Stat_t).Uid != 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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processPath := filepath.Join("/proc", f.Name())
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fdPath := filepath.Join(processPath, "fd")
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fds, err := os.ReadDir(fdPath)
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if err != nil {
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@ -190,13 +157,13 @@ func resolveProcessNameByProcSearch(inode, uid int32) (string, error) {
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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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n, err := unix.Readlink(filepath.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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return os.Readlink(path.Join(processPath, "exe"))
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return os.Readlink(filepath.Join(processPath, "exe"))
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}
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}
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}
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4
go.mod
4
go.mod
@ -9,6 +9,7 @@ require (
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github.com/gofrs/uuid v4.2.0+incompatible
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github.com/gorilla/websocket v1.5.0
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github.com/insomniacslk/dhcp v0.0.0-20220822114210-de18a9d48e84
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github.com/mdlayher/netlink v1.6.0
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github.com/miekg/dns v1.1.50
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github.com/oschwald/geoip2-golang v1.8.0
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github.com/sirupsen/logrus v1.9.0
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@ -26,7 +27,10 @@ require (
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require (
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github.com/ajg/form v1.5.1 // indirect
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github.com/davecgh/go-spew v1.1.1 // indirect
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github.com/google/go-cmp v0.5.7 // indirect
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github.com/josharian/native v1.0.0 // indirect
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github.com/kr/text v0.2.0 // indirect
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github.com/mdlayher/socket v0.1.1 // indirect
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github.com/oschwald/maxminddb-golang v1.10.0 // indirect
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github.com/pmezard/go-difflib v1.0.0 // indirect
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github.com/u-root/uio v0.0.0-20210528114334-82958018845c // indirect
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16
go.sum
16
go.sum
@ -18,12 +18,17 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
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github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
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github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
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github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
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github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
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github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
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github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714/go.mod h1:2Goc3h8EklBH5mspfHFxBnEoURQCGzQQH1ga9Myjvis=
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github.com/insomniacslk/dhcp v0.0.0-20220822114210-de18a9d48e84 h1:MJTy6H+EpXLeAn0P5WAWeLk6dJA3V0ik6S3VJfUyQuI=
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github.com/insomniacslk/dhcp v0.0.0-20220822114210-de18a9d48e84/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E=
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github.com/josharian/native v1.0.0 h1:Ts/E8zCSEsG17dUqv7joXJFybuMLjQfWE04tsBODTxk=
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github.com/josharian/native v1.0.0/go.mod h1:7X/raswPFr05uY3HiLlYeyQntB6OO7E/d2Cu7qoaN2w=
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github.com/jsimonetti/rtnetlink v0.0.0-20190606172950-9527aa82566a/go.mod h1:Oz+70psSo5OFh8DBl0Zv2ACw7Esh6pPUphlvZG9x7uw=
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github.com/jsimonetti/rtnetlink v0.0.0-20200117123717-f846d4f6c1f4/go.mod h1:WGuG/smIU4J/54PblvSbh+xvCZmpJnFgr3ds6Z55XMQ=
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github.com/jsimonetti/rtnetlink v0.0.0-20201009170750-9c6f07d100c1/go.mod h1:hqoO/u39cqLeBLebZ8fWdE96O7FxrAsRYhnVOdgHxok=
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@ -37,8 +42,12 @@ github.com/mdlayher/netlink v0.0.0-20190409211403-11939a169225/go.mod h1:eQB3mZE
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github.com/mdlayher/netlink v1.0.0/go.mod h1:KxeJAFOFLG6AjpyDkQ/iIhxygIUKD+vcwqcnu43w/+M=
|
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github.com/mdlayher/netlink v1.1.0/go.mod h1:H4WCitaheIsdF9yOYu8CFmCgQthAPIWZmcKp9uZHgmY=
|
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github.com/mdlayher/netlink v1.1.1/go.mod h1:WTYpFb/WTvlRJAyKhZL5/uy69TDDpHHu2VZmb2XgV7o=
|
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github.com/mdlayher/netlink v1.6.0 h1:rOHX5yl7qnlpiVkFWoqccueppMtXzeziFjWAjLg6sz0=
|
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github.com/mdlayher/netlink v1.6.0/go.mod h1:0o3PlBmGst1xve7wQ7j/hwpNaFaH4qCRyWCdcZk8/vA=
|
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github.com/mdlayher/raw v0.0.0-20190606142536-fef19f00fc18/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
|
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github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
|
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github.com/mdlayher/socket v0.1.1 h1:q3uOGirUPfAV2MUoaC7BavjQ154J7+JOkTWyiV+intI=
|
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github.com/mdlayher/socket v0.1.1/go.mod h1:mYV5YIZAfHh4dzDVzI8x8tWLWCliuX8Mon5Awbj+qDs=
|
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github.com/miekg/dns v1.1.50 h1:DQUfb9uc6smULcREF09Uc+/Gd46YWqJd5DbpPE9xkcA=
|
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github.com/miekg/dns v1.1.50/go.mod h1:e3IlAVfNqAllflbibAZEWOXOQ+Ynzk/dDozDxY7XnME=
|
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github.com/oschwald/geoip2-golang v1.8.0 h1:KfjYB8ojCEn/QLqsDU0AzrJ3R5Qa9vFlx3z6SLNcKTs=
|
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@ -87,6 +96,8 @@ golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwY
|
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golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
|
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golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
|
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golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
|
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golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
|
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golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
|
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golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c h1:JVAXQ10yGGVbSyoer5VILysz6YKjdNT2bsvlayjqhes=
|
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golang.org/x/net v0.0.0-20220822230855-b0a4917ee28c/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
|
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
@ -111,11 +122,16 @@ golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7w
|
||||
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20220128215802-99c3d69c2c27/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 h1:UiNENfZ8gDvpiWw7IpOMQ27spWmThO1RwwdQVbJahJM=
|
||||
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
|
||||
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
|
||||
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
|
||||
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
||||
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
|
||||
|
Loading…
Reference in New Issue
Block a user