怎样接收发出SYN数据报后,返回的SYN-ACK应答

nbczhouyi 2004-12-22 08:53:21

自己填写了TCP/IP数据包用来扫描端口，那么发出一个SYN 包后应该会有SYN-ACK应答,那么我怎么才能接收呢?
只有20分了,不好意思.在这里小弟先谢谢各位大哥了

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nb_zhouyi 2005-01-20

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顶

nbczhouyi 2004-12-22

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现在知道了,他改了AfxSock.h中的winsock.h变成winsock2.h了,嘿嘿,刚才没看他的说明

nbczhouyi 2004-12-22

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如果不把winsock2.h中的

#define WSAAPI FAR PASCAL
typedef struct _OVERLAPPED* LPWSAOVERLAPPED;
typedef void
(CALLBACK * LPWSAOVERLAPPED_COMPLETION_ROUTINE)(DWORD dwError,
DWORD cbTransferred,
LPWSAOVERLAPPED lpOverlapped,
DWORD dwFlags);
int
WSAAPI
WSAIoctl(SOCKET s,
DWORD dwIoControlCode,
LPVOID lpvInBuffer,
DWORD cbInBuffer,
LPVOID lpvOutBuffer,
DWORD cbOutBuffer,
LPDWORD lpcbBytesReturned,
LPWSAOVERLAPPED lpOverlapped,
LPWSAOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine);

拷过来的话，WSAIoctl函数提示为error C2065: 'WSAIoctl' : undeclared identifier
想问一下你是怎么用的，还有你介绍的下载源码
#include "mstcpip.h"
#include "iphlpapi.h"
两个头文件找不到，你是怎么编译成功的阿？
还有SIO_RCVALL,在那些头文件里找不到，在MSDN里也找不到，你是怎么定义的阿?

nbczhouyi 2004-12-22

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SIO_RCVALL,你是怎么定义的阿?

iq199 2004-12-22

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这是我以前写的一段代码
SOCKET Socket = socket(AF_INET, SOCK_RAW, IPPROTO_IP);
if(INVALID_SOCKET == Socket)
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_CREATESOCKETFAIL, WSAGetLastError());
return -1;
}

int rcvtimeo = 100;
if(setsockopt(Socket, SOL_SOCKET, SO_RCVTIMEO, (const char *)&rcvtimeo, sizeof(rcvtimeo)) == SOCKET_ERROR)
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_SETTIMEOUTFAIL, WSAGetLastError());
closesocket(Socket);
return -1;
}

SOCKADDR_IN sa;
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = m_dwIP;
if (bind(Socket, (PSOCKADDR)&sa, sizeof(sa)) == SOCKET_ERROR)
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_BINDIPFAIL, WSAGetLastError());
closesocket(Socket);
return -1;
}

DWORD dwInBuffer = 1;
DWORD dwBytesReturned;
if (SOCKET_ERROR == WSAIoctl(Socket, SIO_RCVALL, &dwInBuffer, sizeof(dwInBuffer), NULL, 0, &dwBytesReturned , NULL, NULL))
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_SETRCVALLFAIL, WSAGetLastError());
closesocket(Socket);
return -1;
}

char ReceiveBuffer[0xFFFF];

int nTotalLen = 0;

while (WaitForSingleObject(m_hStopEvent, 0) == WAIT_TIMEOUT)
{
int nReceivedBytes = recv(Socket, ReceiveBuffer, sizeof(ReceiveBuffer), 0);
if (SOCKET_ERROR == nReceivedBytes)
{
int nError = WSAGetLastError();
if (WSAETIMEDOUT == nError)
continue;
else
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_RECEIVEFAIL, WSAGetLastError());
closesocket(Socket);
return -1;
}
}

if (nReceivedBytes < 20)
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_RCVLENLESSTHEN20, nReceivedBytes);
closesocket(Socket);
return -1;
}

if (nReceivedBytes != ntohs(*(WORD*)(ReceiveBuffer+2)))
{
m_pReceiver->OnError(m_dwIP, RSST_ERROR_RCVLENUNEQUALTOPKLEN, nReceivedBytes<<16 | ntohs(*(WORD*)(ReceiveBuffer+2)));
closesocket(Socket);
return -1;
}

m_pReceiver->OnReceived(ReceiveBuffer, nReceivedBytes);
}

closesocket(Socket);

iq199 2004-12-22