发送ip包发不出去，高手请进！

[w_flyer]

#include <winsock2.h>
#include <Ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include "Ipsocket.h"

#define SEQ 0x28376839
#define SYN_DEST_IP "192.168.1.143“
#define FAKE_IP "192.168.1.143"
#define STATUS_FAILED 0xFFFF //错误返回值
#pragma comment (lib, "Ws2_32.lib")


unsigned short checksum(unsigned short *buffer, int size)
{
unsigned long cksum=0;
while(size >1)
{
cksum+=*buffer++;
size -=sizeof(unsigned short);
}
if(size ) cksum += *(BYTE*)buffer;
cksum = (cksum >> 16) + (cksum & 0xffff);
cksum += (cksum >>16);
return (unsigned short)(~cksum);
}


int SendIP()
{
PSD_HEADER psd_header;
int datasize,ErrorCode,counter,flag,FakeIpNet,FakeIpHost;
int TimeOut=2000,SendSEQ=0;
char SendBuf[128]={0};
WSADATA wsaData;
SOCKET SockRaw=(SOCKET)NULL;
struct sockaddr_in DestAddr;
IP_HEADER ip_header;
TCP_HEADER tcp_header;

//初始化SOCK_RAW
if((ErrorCode=WSAStartup(MAKEWORD(2,1),&wsaData))!=0)
{
fprintf(stderr,"WSAStartup failed: %d\n",ErrorCode);
ExitProcess(STATUS_FAILED);
}
SockRaw=WSASocket(AF_INET,SOCK_RAW,IPPROTO_RAW,NULL,0,WSA_FLAG_OVERLAPPED);
if (SockRaw==INVALID_SOCKET)
{
fprintf(stderr,"WSASocket() failed: %d\n",WSAGetLastError());
ExitProcess(STATUS_FAILED);
}
flag=TRUE;

//设置IP_HDRINCL以自己填充IP首部
ErrorCode=setsockopt(SockRaw,IPPROTO_IP,IP_HDRINCL,(char *)&flag,sizeof(int));
if (ErrorCode==SOCKET_ERROR)
printf("Set IP_HDRINCL Error!\n");
__try
{
//设置发送超时
ErrorCode=setsockopt(SockRaw,SOL_SOCKET,SO_SNDTIMEO,(char*)&TimeOut,sizeof(TimeOut));
if(ErrorCode==SOCKET_ERROR)
{
fprintf(stderr,"Failed to set send TimeOut: %d\n",WSAGetLastError());
}
memset(&DestAddr,0,sizeof(DestAddr));
DestAddr.sin_family=AF_INET;
DestAddr.sin_addr.s_addr=inet_addr(SYN_DEST_IP);
FakeIpNet=inet_addr(FAKE_IP);
FakeIpHost=ntohl(FakeIpNet);
//填充IP首部
ip_header.h_verlen=(4<<4 | sizeof(ip_header)/sizeof(unsigned long));
ip_header.total_len=htons(sizeof(IP_HEADER)+sizeof(TCP_HEADER)); //16位总长度（字节）
ip_header.ident=1; //16位标识
ip_header.frag_and_flags=0; //3位标志位
ip_header.ttl=128; //8位生存时间TTL
ip_header.proto=IPPROTO_TCP; //8位协议(TCP,UDP…)
ip_header.checksum=0; //16位IP首部校验和
ip_header.sourceIP=htonl(FakeIpHost+SendSEQ); //32位源IP地址
ip_header.destIP=inet_addr(SYN_DEST_IP); //32位目的IP地址
//填充TCP首部
tcp_header.th_sport=htons(6010); //源端口号
tcp_header.th_dport=htons(5000); //目的端口号
tcp_header.th_seq=htonl(SEQ+SendSEQ); //SYN序列号
tcp_header.th_ack=0; //ACK序列号置为0
tcp_header.th_lenres=(sizeof(TCP_HEADER)/4<<4|0); //TCP长度和保留位
tcp_header.th_flag=2; //SYN 标志
tcp_header.th_win=htons(2048); //窗口大小
tcp_header.th_urp=0; //偏移
tcp_header.th_sum=0; //校验和
//填充TCP伪首部（用于计算校验和，并不真正发送）
psd_header.saddr=ip_header.sourceIP; //源地址
psd_header.daddr=ip_header.destIP; //目的地址
psd_header.mbz=0;
psd_header.ptcl=6; //协议类型
psd_header.tcpl=htons(sizeof(tcp_header)); //TCP首部长度

ip_header.checksum=0; //16位IP首部校验和
tcp_header.th_sum=0; //校验和

//计算TCP校验和，计算校验和时需要包括TCP pseudo header
memcpy(SendBuf,&psd_header,sizeof(psd_header));
memcpy(SendBuf+sizeof(psd_header),&tcp_header,sizeof(tcp_header));
tcp_header.th_sum=checksum((unsigned short *)SendBuf,
sizeof(psd_header)+sizeof(tcp_header));
//计算IP校验和
memcpy(SendBuf,&ip_header,sizeof(ip_header));
memcpy(SendBuf+sizeof(ip_header),&tcp_header,sizeof(tcp_header));
memset(SendBuf+sizeof(ip_header)+sizeof(tcp_header),0,4);
datasize=sizeof(ip_header)+sizeof(tcp_header);
ip_header.checksum=checksum((unsigned short *)SendBuf,datasize);
//填充发送缓冲区
memcpy(SendBuf,&ip_header,sizeof(ip_header));
//发送TCP报文
ErrorCode=sendto(SockRaw,SendBuf, datasize, 0,
(struct sockaddr*)&DestAddr, sizeof(DestAddr));
if (ErrorCode==SOCKET_ERROR)
printf("\nSend Error:%d\n",GetLastError());
}//End of try
__finally {
/*
while(1)
{
//每发送10,240个报文输出一个标示符
printf(".");
for(counter=0;counter<10240;counter++)
{
if(SendSEQ++==65536) SendSEQ=1; //序列号循环
//更改IP首部
ip_header.checksum=0; //16位IP首部校验和
ip_header.sourceIP=htonl(FakeIpHost+SendSEQ); //32位源IP地址
//更改TCP首部
tcp_header.th_seq=htonl(SEQ+SendSEQ); //SYN序列号
tcp_header.th_sum=0; //校验和
//更改TCP Pseudo Header
psd_header.saddr=ip_header.sourceIP;
//计算TCP校验和，计算校验和时需要包括TCP pseudo header
memcpy(SendBuf,&psd_header,sizeof(psd_header));
memcpy(SendBuf+sizeof(psd_header),&tcp_header,sizeof(tcp_header));
tcp_header.th_sum=checksum((unsigned short *)SendBuf,sizeof(psd_header)+sizeof(tcp_header));
//计算IP校验和
memcpy(SendBuf,&ip_header,sizeof(ip_header));
memcpy(SendBuf+sizeof(ip_header),&tcp_header,sizeof(tcp_header));
memset(SendBuf+sizeof(ip_header)+sizeof(tcp_header),0,4);
datasize=sizeof(ip_header)+sizeof(tcp_header);
ip_header.checksum=checksum((unsigned short *)SendBuf,datasize);
//填充发送缓冲区
memcpy(SendBuf,&ip_header,sizeof(ip_header));
//发送TCP报文
ErrorCode=sendto(SockRaw,SendBuf, datasize, 0,
(struct sockaddr*)&DestAddr, sizeof(DestAddr));
if (ErrorCode==SOCKET_ERROR) printf("\nSend Error:%d\n",GetLastError());
}//End of for
}//End of While
}//End of try

*/
if (SockRaw != INVALID_SOCKET) closesocket(SockRaw);
WSACleanup();
}
return 0;
}

[NowCan]

天！

[xinghf]

搞什么飞机

[大大怪老张]

too long to read.