使用jna调用windows api，前提是jna提供了dll的一些操作方法, 但是具体接口映射需要在java实现一遍映射
这里分了几个小文件做映射
先看main class
/** This source file was generated by the Gradle 'init' task*/
package wpcap.app;import java.net.InetAddress;import com.sun.jna.ptr.IntByReference;import wpcap.library.WinSock2Library;
import wpcap.library.structure.WsaDataStructure;
import wpcap.library.structure.SockaddrInStructure;public class Main {public static void main(String[] args) {// 开启 WSAStartupWsaDataStructure WsaDataStructure = new WsaDataStructure(); int errno = WinSock2Library.INSTANCE.WSAStartup((short)0x0202, WsaDataStructure); if (errno != 0) { System.out.println("WSAStartup: " + errno); return;}System.out.println(new String( WsaDataStructure.szDescription ) ); // 创建 socketlong raw_socket = WinSock2Library.INSTANCE.socket(WinSock2Library.AF_INET, WinSock2Library.SOCK_RAW, WinSock2Library.IPPROTO_IP);System.out.println("socket: " + raw_socket); if (raw_socket == 0) { System.out.println("socket: " + errno); return;}// 允许接收ip头byte[] enable = {1};WinSock2Library.INSTANCE.setsockopt(raw_socket, WinSock2Library.IPPROTO_IP, WinSock2Library.IP_HDRINCL, enable, Integer.SIZE);// 绑定监听的ip和端口SockaddrInStructure SockaddrInStructure = new SockaddrInStructure();SockaddrInStructure.sin_family = (short)WinSock2Library.AF_INET;SockaddrInStructure.sin_port = (short)0;try {InetAddress localHost = InetAddress.getLocalHost();byte[] ip = localHost.getAddress();System.arraycopy(ip, 0, SockaddrInStructure.sin_addr, 0, 4);} catch (Exception e) {System.out.println(e); }errno = WinSock2Library.INSTANCE.bind(raw_socket, SockaddrInStructure, SockaddrInStructure.size());if (errno != 0) { System.out.println("bind: " + errno); return;}// 设置混杂模式IntByReference dwValue = new IntByReference( WinSock2Library.SIO_RCVALL_ON );errno = WinSock2Library.INSTANCE.ioctlsocket( raw_socket, WinSock2Library.SIO_RCVALL, dwValue );if (errno != 0) { System.out.println("WSAGetLastError: " + errno); return;}System.out.println("启动成功"); // 开始接收数据包byte[] buf = new byte[512]; while (true) {int rec = WinSock2Library.INSTANCE.recv(raw_socket, buf, 512, 0);if ( rec != -1 ) {System.out.println("rec: " + rec); }}}}
接着是WinSock2Library.java 映射WinSock2.h
package wpcap.library;import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.ptr.IntByReference;import wpcap.library.structure.WsaDataStructure;
import wpcap.library.structure.SockaddrInStructure; // char* ByteByReference或Pointer
// char** PointerByReference
// char& PointerByReference// int* IntByReference或Pointer
// int& IntByReference// float* FloatByReference或Pointer
// double* DoubleByReference或Pointer// void ** PointerByReference
// void* Pointer// LPCVOID byte[]/Pointer
// DWORD int/long
// LPDWORD IntByReference/LongByReference
// LPOVERLAPPED com.sun.jna.platform.win32.WinBase.OVERLAPPED
// OVERLAPPED com.sun.jna.platform.win32.WinNT.OVERLAPPED_COMPLETION_ROUTINE
// LPCWSTR String
// LPWSTR char[]/String
// HANDLE com.sun.jna.platform.win32.WinNT.HANDLE
// SIZE_T int/long
// PDWORD DWORDByReference// Pointer Memory
// DWORD DWORDpublic interface WinSock2Library extends Library {WinSock2Library INSTANCE = (WinSock2Library) Native.load("ws2_32", WinSock2Library.class);int WSAStartup(short wVersionRequired, WsaDataStructure lpWSAData);long socket(int family, int socktype, int protocol);int setsockopt(long socket, int protocol, int opt, byte[] optVal, int optLen);int bind(long socket, SockaddrInStructure sockaddr, int sockaddr_len);int ioctlsocket(long socket, long dwIoControlCode, IntByReference lpvInBuffer);int recv(long socket, byte[] buf, int len, int flags);int WSAGetLastError();int AF_INET = 2;int SOCK_RAW = 3;int IPPROTO_IP = 0;long SIO_RCVALL = 0x98000001L; // 2550136833int SIO_RCVALL_ON = 0x00000001;int IP_HDRINCL = 2;
}
接着是结构体映射
WsaDataStructure.java
package wpcap.library.structure;import com.sun.jna.Structure;
import com.sun.jna.Structure.FieldOrder; @FieldOrder({"wVersion", "wHighVersion", "szDescription", "szSystemStatus", "iMaxSockets", "iMaxUdpDg", "lpVendorInfo"})
public class WsaDataStructure extends Structure {public short wVersion; public short wHighVersion; public short iMaxSockets; public short iMaxUdpDg; public char lpVendorInfo; public byte[] szDescription = new byte[WSADESCRIPTION_LEN + 1]; public byte[] szSystemStatus = new byte[WSASYS_STATUS_LEN + 1]; public static final int WSADESCRIPTION_LEN = 256; public static final int WSASYS_STATUS_LEN = 128;
}
SockaddrInStructure.java
package wpcap.library.structure;import com.sun.jna.Structure;
import com.sun.jna.Structure.FieldOrder; @FieldOrder({"sin_family", "sin_port", "sin_addr", "sin_zero"})
public class SockaddrInStructure extends Structure {public short sin_family;public short sin_port;public byte[] sin_addr = new byte[4];public byte[] sin_zero = new byte[8];
}
Library是映射对应的dll接口
Struture是映射一些数据结构
以这种映射的方法达到java使用jna来调用windows api实现抓包