Go调用Window SendARP() 方法

首先用了walk里面的一个winapi.go

<!-- lang: cpp -->
// Copyright 2010 The go-winapi Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package winapi

import (
    "runtime"
    "syscall"
    "unsafe"
)

func init() {
    runtime.LockOSThread()
}

const (
    S_OK           = 0x00000000
    S_FALSE        = 0x00000001
    E_UNEXPECTED   = 0x8000FFFF
    E_NOTIMPL      = 0x80004001
    E_OUTOFMEMORY  = 0x8007000E
    E_INVALIDARG   = 0x80070057
    E_NOINTERFACE  = 0x80004002
    E_POINTER      = 0x80004003
    E_HANDLE       = 0x80070006
    E_ABORT        = 0x80004004
    E_FAIL         = 0x80004005
    E_ACCESSDENIED = 0x80070005
    E_PENDING      = 0x8000000A
)

const (
    FALSE = 0
    TRUE  = 1
)

type (
    BOOL    int32
    HRESULT int32
)

type GUID struct {
    Data1 uint32
    Data2 uint16
    Data3 uint16
    Data4 [8]byte
}

func MustLoadLibrary(name string) uintptr {
    lib, err := syscall.LoadLibrary(name)
    if err != nil {
        panic(err)
    }

    return uintptr(lib)
}

func MustGetProcAddress(lib uintptr, name string) uintptr {
    addr, err := syscall.GetProcAddress(syscall.Handle(lib), name)
    if err != nil {
        panic(err)
    }

    return uintptr(addr)
}

func SUCCEEDED(hr HRESULT) bool {
    return hr >= 0
}

func FAILED(hr HRESULT) bool {
    return hr < 0
}

func MAKELONG(lo, hi uint16) uint32 {
    return uint32(uint32(lo) | ((uint32(hi)) << 16))
}

func LOWORD(dw uint32) uint16 {
    return uint16(dw)
}

func HIWORD(dw uint32) uint16 {
    return uint16(dw >> 16 & 0xffff)
}

func UTF16PtrToString(s *uint16) string {
    return syscall.UTF16ToString((*[1 << 29]uint16)(unsafe.Pointer(s))[0:])
}

func MAKEINTRESOURCE(id uintptr) *uint16 {
    return (*uint16)(unsafe.Pointer(id))
}

func BoolToBOOL(value bool) BOOL {
    if value {
        return 1
    }

    return 0
}

具体的SendARP实现

<!-- lang: cpp -->
package winapi

import (
    "syscall"
    "unsafe"
)

var (
    // Library
    libIphlpapi uintptr
    libWs2_32   uintptr

    // Functions
    sendARP     uintptr
    inet_addr   uintptr
)

func init() {
    // library
    libIphlpapi = MustLoadLibrary("Iphlpapi.dll")
    libWs2_32 = MustLoadLibrary("Ws2_32.dll")

    // Functions
    /** SendARP(DestIp IPAddr, SrcIp IPAddr, &MacAddr, &PhysAddrLen ULONG) **/
    sendARP = MustGetProcAddress(libIphlpapi, "SendARP")
    inet_addr = MustGetProcAddress(libWs2_32, "inet_addr")
}

/**
 * macAddr是目标的MAC地址
 */
func SendARP(destIP, srcIP int32, macAddr *int64, physAddrLen *int) int {
    ret, _, _ := syscall.Syscall6(sendARP, 4,
        uintptr(destIP),
        uintptr(srcIP),
        uintptr(unsafe.Pointer(macAddr)),
        uintptr(unsafe.Pointer(physAddrLen)),
        0,
        0)
    return int(ret)
}

func Inet_addr(ipaddr string) (result int32) {
    ret, _, _ := syscall.Syscall(inet_addr, 1, // 1表示有一个参数
    uintptr(unsafe.Pointer(syscall.StringBytePtr(ipaddr))),
    0,
    0)
    return int32(ret)
}

调用

<!-- lang:cpp -->
package main

import (
    "lqz/system/winapi"
    // "strconv"
    // "strings"
    // "os"
    "log"
    "fmt"
)

func main() {
    for i := 1; i <= 100; i++ {
        getMac(fmt.Sprintf("192.168.2.%d", i))
    }
}

func getMac(ip string) {
    var macLen int = 6
    var mac int64 = 0
    destIP := winapi.Inet_addr(ip)
    result := winapi.SendARP(destIP, 0, &mac, &macLen)
    if result == 0 {
        log.Print(ip)
        pyMac := fmt.Sprintf("%012X", mac)
        x := 2 * macLen
        var tempMac string
        for i := 0; i < macLen; i++ {
            if i == (macLen - 1) {
                tempMac = tempMac + pyMac[x-2:x]
            } else {
                tempMac = tempMac + pyMac[x-2:x] + "-"
            }
            x -= 2
        }
        log.Println(tempMac)
    }

}

感觉还有点缺陷，比如说那个0， 应该在上面定义好的，但是我不知道这个面的值，都表示什么意思，只知道0是NOERROR,还有其他信息，但是我看MSDN上面的SendARP里面没有给出值，这个以后补上