监听发往本机和从本机发出的数据包代码,C代码库,德仔网

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【C】监听发往本机和从本机发出的数据包

作者:纳兰清风 / 发布于2013/3/18/ 682


	#ifndef _TCP_HEAD_
	#define _TCP_HEAD_

	typedef struct _tcphdr
	{
	 unsigned short tcp_sport;
	 unsigned short tcp_dport;
	 unsigned int tcp_seq;
	 unsigned int tcp_ack;
	 unsigned char tcp_lenres;
	 unsigned char tcp_flag;
	 unsigned short tcp_win;
	 unsigned short tcp_sum;
	 unsigned short tcp_urp;
	} TCP_HEADER,*pTCP_HEADER;

	#endif

	#ifndef _UDP_HEAD_
	#define _UDP_HEAD_

	typedef struct _udphdr
	{
	unsigned short uh_sport;
	 unsigned short uh_dport;
	 unsigned short uh_len;
	 unsigned short uh_sum;
	}UDP_HEADER,*pUDP_HEADER;

	#endif

	#ifndef _IP_HEAD_
	#define _IP_HEAD_

	typedef struct _iphdr
	{
	unsigned char h_verlen;
	unsigned char tos;
	unsigned short total_len;
	unsigned short ident;
	unsigned short frag_and_flags;
	unsigned char ttl;
	unsigned char proto;
	unsigned short checksum;
	unsigned int sourceIP;
	unsigned int destIP;
	}IP_HEADER,*pIP_HEADER;

	#endif

	

	

	#pragma once

	#include <SDKDDKVer.h>

	#include <stdio.h>
	#include <tchar.h>

	#include "head.h"
	#include <winsock2.h>
	#include <iostream>
	#include <memory.h>
	#include <time.h>

	#include <windows.h>
	#include <Ws2tcpip.h>

	#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)

	

	// socket.cpp
	//

	#include "stdafx.h"
	#include <string>
	#pragma comment (lib,"Ws2_32")


	void Decodepkt(char* buff,int len);
	std::string CheckProto(int pro);
	void DecodeUDP(char* buff);
	void DecodeTCP(char* buff);

	using namespace std;

	int main(int argc, char* argv[])
	{
	WSADATA wsaData;
	struct sockaddr_in SourceAddr;
	char recvbuff[65535]={'\0'};
	SOCKET ListenSocket;
	bool flag=true;

	int err=WSAStartup(MAKEWORD(2,2),&wsaData);
	if(err!=0){
	 cout<<"failed in WSAStartup()"<<endl;
	 goto error;
	}

	ListenSocket=socket(AF_INET, SOCK_RAW,IPPROTO_IP);
	if(ListenSocket==INVALID_SOCKET)
	{
	 cout<<"failed in socket()"<<WSAGetLastError()<<endl;
	 goto error;
	}
	
	if(setsockopt(ListenSocket,IPPROTO_IP,IP_HDRINCL,(char*)&flag,sizeof(int))==SOCKET_ERROR)
	{
	 cout<<"failed in setsockopt(IPP)"<<WSAGetLastError()<<endl;
	 goto error;
	}

	struct hostent* phost;
	char hostname[100]={'\0'};
	gethostname(hostname,100);
	phost=gethostbyname(hostname);
	int Sourcelen=sizeof(SourceAddr);
	SourceAddr.sin_family=AF_INET;
	SourceAddr.sin_port=htons(10000);
	memcpy(&SourceAddr.sin_addr.s_addr,phost->h_addr_list[0],phost->h_length);
	
	if(bind(ListenSocket,(struct sockaddr*)&SourceAddr,Sourcelen)!=0)
	{
	 cout<<"failed in bind()"<<endl;
	 goto error;
	}

	DWORD dwBuffIn=1;
	DWORD dwBuffOut[10];
	DWORD dwBytesReturned =0;
	if(WSAIoctl(ListenSocket,SIO_RCVALL,&dwBuffIn,sizeof(dwBuffIn),dwBuffOut,sizeof(dwBuffOut),&dwBytesReturned,NULL,NULL)<0){
	 cout<<"failed in WSAIoctl()"<<endl;
	 goto error;
	}
	int bytes_recv=0;
	while(true)
	{
	 memset(recvbuff,0x00,sizeof(recvbuff));
	 bytes_recv=recv(ListenSocket,recvbuff,sizeof(recvbuff),0);
	 if(bytes_recv==0)
	 {
	 continue;
	 cout<<"empty"<<endl;
	 }
	 Decodepkt(recvbuff,sizeof(recvbuff));
	}
	error:
	WSACleanup();
	system("pause");
	return 0;
	}
	void Decodepkt(char* buff,int len)
	{
	IP_HEADER* ip;
	ip=(pIP_HEADER)buff;
	string pro=CheckProto(ip->proto);
	struct in_addr source,dest;
	source.s_addr=(u_long)ip->sourceIP;
	dest.s_addr=(u_long)ip->destIP;
	cout<<"Network:"<<endl;
	cout<<"Src IP: "<<inet_ntoa(source)<<endl;
	cout<<"Dest IP: "<<inet_ntoa(dest)<<endl;
	cout<<"protocal:"<<pro<<endl;
	int iplen=(ip->h_verlen&0x0f)<<2;
	if(pro=="TCP")
	{
	 DecodeTCP(buff+iplen);
	}
	else if(pro=="UDP")
	{
	 DecodeUDP(buff+iplen);
	}

	}
	std::string CheckProto(int pro)
	{
	std::string result="";
	switch(pro)
	{
	case 1:
	 result="ICMP";
	 break;
	case 2:
	 result="IGMP";
	 break;
	case 3:
	 result="GGP";
	 break;
	case 4:
	 result="IP";
	 break;
	case 6:
	 result="TCP";
	 break;
	case 17:
	 result="UDP";
	 break;
	default:
	 result="Invalid protocol";
	 break;
	}
	return result;
	}

	void DecodeUDP(char* buff)
	{
	pUDP_HEADER udp=(pUDP_HEADER)buff;
	cout<<"Src Port:"<<ntohs(udp->uh_sport)<<endl;
	cout<<"Dest Port:"<<ntohs(udp->uh_dport)<<endl;
	char* data=buff+sizeof(UDP_HEADER);
	cout<<"Data:"<<data<<endl;
	}
	void DecodeTCP(char* buff)
	{
	pTCP_HEADER tcp=(pTCP_HEADER)buff;
	cout<<"Src Port:"<<ntohs(tcp->tcp_sport)<<endl;
	cout<<"Dest Port:"<<ntohs(tcp->tcp_dport)<<endl;
	char* data=buff+sizeof(TCP_HEADER);
	cout<<"Data:"<<data<<endl;
	}

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