{"id":2143,"date":"2019-06-27T12:51:43","date_gmt":"2019-06-27T04:51:43","guid":{"rendered":"https:\/\/tixbay.net\/?p=2143"},"modified":"2019-07-05T00:16:23","modified_gmt":"2019-07-04T16:16:23","slug":"%e5%85%b3%e4%ba%8etcp%e6%89%93%e6%b4%9e%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/tixbay.net\/?p=2143","title":{"rendered":"[\u8f6c]\u5173\u4e8eTCP\u6253\u6d1e\u6280\u672f"},"content":{"rendered":"\n

[\u8f6c\u81ea] https:\/\/blog.csdn.net\/zhongguoren666\/article\/details\/7489809<\/p>\n\n\n\n

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1 \u5957\u63a5\u5b57\u548cTCP\u7aef\u53e3\u7684\u91cd\u7528<\/p>\n\n\n\n

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2 \u6253\u5f00p2p\u7684TCP\u6d41<\/p>\n\n\n\n

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7)\u3001\u5ba2\u6237\u7aefB\u6253\u6d1e\u7684\u540c\u65f6\u5728\u76f8\u540c\u7684\u7aef\u53e3\u4e0a\u542f\u52a8\u4fa6\u542c\u3002B\u5728\u4e00\u5207\u51c6\u5907\u5c31\u7eea\u4ee5\u540e\u901a\u8fc7\u4e0eS\u7684\u3010\u4e3b\u8fde\u63a5\u3011\u56de\u590d\u6d88\u606f\u201c\u6211\u5df2\u7ecf\u51c6\u5907\u597d\u201d\uff0cS\u5728\u6536\u5230\u4ee5\u540e\u5c06B\u7ecf\u8fc7NAT-B\u8f6c\u6362\u540e\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\u53f7\u544a\u8bc9\u7ed9A\u3002<\/p>\n\n\n\n

8)\u3001 A\u6536\u5230S\u56de\u590d\u7684B\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\u53f7\u7b49\u4fe1\u606f\u4ee5\u540e\uff0c\u5f00\u59cb\u8fde\u63a5\u5230B\u516c\u7f51IP\u548c\u7aef\u53e3\u53f7\uff0c\u7531\u4e8e\u5728\u6b65\u9aa46\u4e2dB\u66fe\u7ecf\u5c1d\u8bd5\u8fde\u63a5\u8fc7A\u7684\u516c\u7f51IP\u5730\u5740\u548c\u7aef\u53e3\uff0cNAT-A\u7eaa\u5f55\u4e86\u6b64\u6b21\u8fde\u63a5\u7684\u4fe1\u606f\uff0c\u6240\u4ee5\u5f53A\u4e3b\u52a8\u8fde\u63a5B\u65f6\uff0cNAT-B\u4f1a\u8ba4\u4e3a\u662f\u5408\u6cd5\u7684SYN\u6570\u636e\uff0c\u5e76\u5141\u8bb8\u901a\u8fc7\uff0c\u4ece\u800c\u76f4\u63a5\u7684TCP\u8fde\u63a5\u5efa\u7acb\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n

\u56fe7
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TCP\u6570\u636e\u901a\u8fc7\u3002\u5982\u679cNAT\u8bbe\u5907\u652f\u6301TCP\u201c\u6253\u6d1e\u201d\u64cd\u4f5c\u7684\u8bdd\uff0c\u4e00\u4e2a\u5728\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u57fa\u4e8eTCP\u534f\u8bae\u7684\u6d41
\u901a\u9053\u5c31\u4f1a\u81ea\u52a8\u5efa\u7acb\u8d77\u6765\u3002\u5982\u679cA\u5411B\u53d1\u9001\u7684\u7b2c\u4e00\u4e2aSYN\u5305\u53d1\u5230\u4e86B\u7684NAT\u8bbe\u5907\uff0c\u800cB\u5728\u6b64\u524d\u6ca1\u6709\u5411
A\u53d1\u9001SYN\u5305\uff0cB\u7684NAT\u8bbe\u5907\u4f1a\u4e22\u5f03\u8fd9\u4e2a\u5305\uff0c\u8fd9\u4f1a\u5f15\u8d77A\u7684\u201c\u8fde\u63a5\u5931\u8d25\u201d\u6216\u201c\u65e0\u6cd5\u8fde\u63a5\u201d\u95ee\u9898\u3002\u800c\u6b64\u65f6\uff0c\u7531\u4e8eA\u5df2\u7ecf\u5411B\u53d1\u9001\u8fc7SYN\u5305\uff0cB\u53d1\u5f80A\u7684SYN\u5305\u5c06\u88ab\u770b\u4f5c\u662f\u7531A\u53d1\u5f80B\u7684\u5305\u7684\u56de\u5e94\u7684\u4e00\u90e8\u5206\uff0c
\u6240\u4ee5B\u53d1\u5f80A\u7684SYN\u5305\u4f1a\u987a\u5229\u5730\u901a\u8fc7A\u7684NAT\u8bbe\u5907\uff0c\u5230\u8fbeA\uff0c\u4ece\u800c\u5efa\u7acb\u8d77A\u4e0eB\u7684p2p\u8fde\u63a5\u3002<\/p>\n\n\n\n

3 \u4ece\u5e94\u7528\u7a0b\u5e8f\u7684\u89d2\u5ea6\u6765\u770bTCP\u201c\u6253\u6d1e\u201d<\/p>\n\n\n\n

\u4ece\u5e94\u7528\u7a0b\u5e8f\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5728\u8fdb\u884cTCP\u201c\u6253\u6d1e\u201d\u7684\u65f6\u5019\u90fd\u53d1\u751f\u4e86\u4ec0\u4e48\u5462\uff1f<\/p>\n\n\n\n

\u5047\u5b9aA\u9996\u5148\u5411B\u53d1\u51faSYN\u5305\uff0c\u8be5\u5305\u53d1\u5f80B\u7684\u516c\u7f51endpoint\uff0c\u5e76\u4e14\u88abB\u7684NAT\u8bbe\u5907\u4e22\u5f03\uff0c\u4f46\u662fB\u53d1\u5f80A\u7684\u516c\u7f51endpoint\u7684SYN\u5305\u5219\u901a\u8fc7A\u7684NAT\u5230\u8fbe\u4e86A\uff0c\u7136\u540e\uff0c\u4f1a\u53d1\u751f\u4ee5\u4e0b\u7684\u4e24\u79cd\u7ed3\u679c\u4e2d\u7684\u4e00\u79cd\uff0c\u5177\u4f53\u662f\u54ea\u4e00\u79cd\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5bf9TCP\u534f\u8bae\u7684\u5b9e\u73b0\uff1a<\/p>\n\n\n\n

\uff081\uff09A\u7684TCP\u5b9e\u73b0\u4f1a\u53d1\u73b0\u6536\u5230\u7684SYN\u5305\u5c31\u662f\u5176\u53d1\u8d77\u8fde\u63a5\u5e76\u5e0c\u671b\u8054\u5165\u7684B\u7684SYN\u5305\uff0c\u901a\u4fd7\u4e00\u70b9\u6765\u8bf4
\u5c31\u662f\u201c\u8bf4\u66f9\u64cd\uff0c\u66f9\u64cd\u5230\u201d\u7684\u610f\u601d\uff0c\u672c\u6765A\u8981\u53bb\u627eB\uff0c\u7ed3\u679cB\u81ea\u5df1\u627e\u4e0a\u95e8\u6765\u4e86\u3002A\u7684TCP\u534f\u8bae\u6808\u56e0\u6b64
\u4f1a\u628aB\u505a\u4e3aA\u5411B\u53d1\u8d77\u8fde\u63a5connect\u7684\u4e00\u90e8\u5206\uff0c\u5e76\u8ba4\u4e3a\u8fde\u63a5\u5df2\u7ecf\u6210\u529f\u3002\u7a0b\u5e8fA\u8c03\u7528\u7684\u5f02\u6b65connect()
\u51fd\u6570\u5c06\u6210\u529f\u8fd4\u56de\uff0cA\u7684listen()\u7b49\u5f85\u4ece\u5916\u90e8\u8054\u5165\u7684\u51fd\u6570\u5c06\u6ca1\u6709\u4efb\u4f55\u53cd\u6620\u3002\u6b64\u65f6\uff0cB\u8054\u5165A\u7684\u64cd\u4f5c
\u5728A\u7a0b\u5e8f\u7684\u5185\u90e8\u88ab\u7406\u89e3\u4e3aA\u8054\u5165B\u8fde\u63a5\u6210\u529f\uff0c\u5e76\u4e14A\u5f00\u59cb\u4f7f\u7528\u8fd9\u4e2a\u8fde\u63a5\u4e0eB\u5f00\u59cbp2p\u901a\u4fe1\u3002<\/p>\n\n\n\n

\u7531\u4e8eA\u6536\u5230\u7684SYN\u5305\u4e2d\u4e0d\u5305\u542bA\u9700\u8981\u7684ACK\u6570\u636e\uff0c\u56e0\u6b64\uff0cA\u7684TCP\u5c06\u7528SYN-ACK\u5305\u56de\u5e94B\u7684\u516c\u7f51endpoint\uff0c
\u5e76\u4e14\u5c06\u4f7f\u7528\u5148\u524dA\u53d1\u5411B\u7684SYN\u5305\u4e00\u6837\u7684\u5e8f\u5217\u53f7\u3002\u4e00\u65e6B\u7684TCP\u6536\u5230\u7531A\u53d1\u6765\u7684SYN-ACK\u5305\uff0c\u5219\u628a\u81ea\u5df1
\u7684ACK\u5305\u53d1\u7ed9A\uff0c\u7136\u540e\u4e24\u7aef\u5efa\u7acb\u8d77TCP\u8fde\u63a5\u3002\u7b80\u5355\u5730\u8bf4\uff0c\u7b2c\u4e00\u79cd\uff0c\u5c31\u662f\u5373\u4f7fA\u53d1\u5f80B\u7684SYN\u5305\u88abB\u7684NAT
\u4e22\u5f03\u4e86\uff0c\u4f46\u662f\u7531\u4e8eB\u53d1\u5f80A\u7684\u5305\u5230\u8fbe\u4e86A\u3002\u7ed3\u679c\u662f\uff0cA\u8ba4\u4e3a\u81ea\u5df1\u8fde\u63a5\u6210\u529f\u4e86\uff0cB\u4e5f\u8ba4\u4e3a\u81ea\u5df1\u8fde\u63a5\u6210\u529f
\u4e86\uff0c\u4e0d\u7ba1\u662f\u8c01\u6210\u529f\u4e86\uff0c\u603b\u4e4b\u8fde\u63a5\u662f\u5df2\u7ecf\u5efa\u7acb\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n

\uff082\uff09\u53e6\u5916\u4e00\u79cd\u7ed3\u679c\u662f\uff0cA\u7684TCP\u5b9e\u73b0\u6ca1\u6709\u50cf\uff081\uff09\u4e2d\u6240\u8bb2\u7684\u90a3\u4e48\u201c\u667a\u80fd\u201d\uff0c\u5b83\u6ca1\u6709\u53d1\u73b0\u73b0\u5728\u8054\u5165\u7684B
\u5c31\u662f\u81ea\u5df1\u5e0c\u671b\u8054\u5165\u7684\u3002\u5c31\u597d\u6bd4\u5728\u673a\u573a\u63a5\u4eba\uff0c\u660e\u660e\u9047\u5230\u4e86\u81ea\u5df1\u60f3\u8981\u63a5\u7684\u4eba\u5374\u4e0d\u8ba4\u8bc6\uff0c\u8bef\u8ba4\u4e3a\u662f\u5176\u5b83
\u7684\u4eba\uff0c\u5b89\u6392\u522b\u4eba\u7ed9\u63a5\u8d70\u4e86\uff0c\u540e\u6765\u624d\u77e5\u9053\u662f\u81ea\u5df1\u9519\u8fc7\u4e86\u673a\u4f1a\uff0c\u4f46\u662f\u65e0\u8bba\u5982\u4f55\uff0c\u4eba\u5df2\u7ecf\u63a5\u5230\u4e86\u4efb\u52a1
\u5df2\u7ecf\u5b8c\u6210\u4e86\u3002\u7136\u540e\uff0cA\u901a\u8fc7\u5e38\u89c4\u7684listen()\u51fd\u6570\u548caccept()\u51fd\u6570\u5f97\u5230\u4e0eB\u7684\u8fde\u63a5\uff0c\u800c\u7531A\u53d1\u8d77\u7684\u5411
B\u7684\u516c\u7f51endpoint\u7684\u8fde\u63a5\u4f1a\u4ee5\u5931\u8d25\u544a\u7ec8\u3002\u5c3d\u7ba1A\u5411B\u7684\u8fde\u63a5\u5931\u8d25\uff0cA\u4ecd\u7136\u5f97\u5230\u4e86B\u53d1\u8d77\u7684\u5411A\u7684\u8fde\u63a5\uff0c
\u7b49\u6548\u4e8eA\u4e0eB\u4e4b\u95f4\u5df2\u7ecf\u8054\u901a\uff0c\u4e0d\u7ba1\u4e2d\u95f4\u8fc7\u7a0b\u5982\u4f55\uff0cA\u4e0eB\u5df2\u7ecf\u8fde\u63a5\u8d77\u6765\u4e86\uff0c\u7ed3\u679c\u662fA\u548cB\u7684\u57fa\u4e8eTCP\u534f\u8bae
\u7684p2p\u8fde\u63a5\u5df2\u7ecf\u5efa\u7acb\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n

\u7b2c\u4e00\u79cd\u7ed3\u679c\u9002\u7528\u4e8e\u57fa\u4e8eBSD\u7684\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u4e8eTCP\u7684\u5b9e\u73b0\uff0c\u800c\u7b2c\u4e8c\u79cd\u7ed3\u679c\u66f4\u52a0\u666e\u904d\u4e00\u4e9b\uff0c\u591a\u6570linux\u548c
windows\u7cfb\u7edf\u90fd\u4f1a\u6309\u7167\u7b2c\u4e8c\u79cd\u7ed3\u679c\u6765\u5904\u7406\u3002<\/p>\n\n\n\n

\u4ee3\u7801\uff1a<\/p>\n\n\n\n

\/\/ \u670d\u52a1\u5668\u5730\u5740\u548c\u7aef\u53e3\u53f7\u5b9a\u4e49<\/p>\n\n\n\ndefine SRV_TCP_MAIN_PORT\u3000\u3000\u3000\u30004000\u3000\u3000\/\/ \u670d\u52a1\u5668\u4e3b\u8fde\u63a5\u7684\u7aef\u53e3\u53f7\n\n\n\ndefine SRV_TCP_HOLE_PORT\u3000\u3000\u3000\u30008000\u3000\u3000\/\/ \u670d\u52a1\u5668\u54cd\u5e94\u5ba2\u6237\u7aef\u6253\u6d1e\u7533\u8bf7\u7684\u7aef\u53e3\u53f7\n\n\n\n

\u8fd9\u4e24\u4e2a\u7aef\u53e3\u662f\u56fa\u5b9a\u7684\uff0c\u670d\u52a1\u5668S\u542f\u52a8\u65f6\u5c31\u5f00\u59cb\u4fa6\u542c\u8fd9\u4e24\u4e2a\u7aef\u53e3\u4e86\u3002<\/p>\n\n\n\n

\/\/
\/\/ \u5c06\u65b0\u5ba2\u6237\u7aef\u767b\u5f55\u4fe1\u606f\u53d1\u9001\u7ed9\u6240\u6709\u5df2\u767b\u5f55\u7684\u5ba2\u6237\u7aef\uff0c\u4f46\u4e0d\u53d1\u9001\u7ed9\u81ea\u5df1
\/\/
BOOL SendNewUserLoginNotifyToAll (LPCTSTR lpszClientIP, UINT nClientPort, DWORD dwID)
{
ASSERT ( lpszClientIP && nClientPort > 0 );
g_CSFor_PtrAry_SockClient.Lock();
for ( int i=0; ipSockClient = (CSockClient)g_PtrAry_SockClient.GetAt(i); \u3000\u3000\u3000\u3000if ( pSockClient && pSockClient->m_bMainConn && pSockClient->m_dwID > 0 && pSockClient->m_dwID != dwID )
{
if (!pSockClient->SendNewUserLoginNotify (lpszClientIP, nClientPort, dwID))
{
g_CSFor_PtrAry_SockClient.Unlock();
return FALSE;
}
}
}
g_CSFor_PtrAry_SockClient.Unlock ();
return TRUE;
}<\/p>\n\n\n\n

\u5f53\u6709\u65b0\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u670d\u52a1\u5668\u65f6\uff0c\u670d\u52a1\u5668\u8d1f\u8d23\u5c06\u8be5\u5ba2\u6237\u7aef\u7684\u4fe1\u606f\uff08IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\uff09\u53d1\u9001\u7ed9\u5176\u4ed6\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n

\/\/
\/\/ \u6267\u884c\u8005\uff1a\u5ba2\u6237\u7aefA
\/\/ \u6709\u65b0\u5ba2\u6237\u7aefB\u767b\u5f55\u4e86\uff0c\u6211\uff08\u5ba2\u6237\u7aefA\uff09\u8fde\u63a5\u670d\u52a1\u5668\u7aef\u53e3 SRV_TCP_HOLE_PORT \uff0c\u7533\u8bf7\u4e0eB\u5efa\u7acb\u76f4\u63a5\u7684TCP\u8fde\u63a5
\/\/
BOOL Handle_NewUserLogin ( CSocket &MainSock, t_NewUserLoginPkt *pNewUserLoginPkt )
{
printf ( “New user ( %s:%u:%u ) login server”, pNewUserLoginPkt->szClientIP,
pNewUserLoginPkt->nClientPort, pNewUserLoginPkt->dwID );
BOOL bRet = FALSE;
DWORD dwThreadID = 0;
t_ReqConnClientPkt ReqConnClientPkt;
CSocket Sock;
CString csSocketAddress;
  char    szRecvBuffer[NET_BUFFER_SIZE] = {0};
int     nRecvBytes = 0;
\/\/ \u521b\u5efa\u6253\u6d1eSocket\uff0c\u8fde\u63a5\u670d\u52a1\u5668\u534f\u52a9\u6253\u6d1e\u7684\u7aef\u53e3\u53f7 SRV_TCP_HOLE_PORT\uff1a
try
{
if ( !Sock.Socket () )
{
printf ( “Create socket failed : %s”, hwFormatMessage(GetLastError()) );
goto finished;
}
 \u3000\u3000\u3000 UINT nOptValue = 1;
if ( !Sock.SetSockOpt ( SO_REUSEADDR, &nOptValue , sizeof(UINT) ) )
{
printf ( “SetSockOpt socket failed : %s”, hwFormatMessage(GetLastError()) );
goto finished;
}
if ( !Sock.Bind ( 0 ) )
{
  printf ( “Bind socket failed : %s”, hwFormatMessage(GetLastError()) );
goto finished;
}
if ( !Sock.Connect ( g_pServerAddess, SRV_TCP_HOLE_PORT ) )
{
printf ( “Connect to [%s:%d] failed : %s”, g_pServerAddess,
SRV_TCP_HOLE_PORT, hwFormatMessage(GetLastError()) );
goto finished;
}
}
catch ( CException e )
{
char szError[255] = {0};
e.GetErrorMessage( szError, sizeof(szError) );
printf ( “Exception occur, %s”, szError );
goto finished;
}
g_pSock_MakeHole = &Sock;
ASSERT ( g_nHolePort == 0 );
VERIFY ( Sock.GetSockName ( csSocketAddress, g_nHolePort ) );
\/\/ \u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u4fa6\u542c\u7aef\u53e3 g_nHolePort \u7684\u8fde\u63a5\u8bf7\u6c42
dwThreadID = 0;
g_hThread_Listen = ::CreateThread ( NULL, 0, ::ThreadProc_Listen, LPVOID(NULL), 0, &dwThreadID );
if (!HANDLE_IS_VALID(g_hThread_Listen) ) return FALSE;
Sleep ( 3000 );
\/\/ \u6211\uff08\u5ba2\u6237\u7aefA\uff09\u5411\u670d\u52a1\u5668\u534f\u52a9\u6253\u6d1e\u7684\u7aef\u53e3\u53f7 SRV_TCP_HOLE_PORT \u53d1\u9001\u7533\u8bf7\uff0c<\/p>\n\n\n\n

    \/\/ \u5e0c\u671b\u4e0e\u65b0\u767b\u5f55\u7684\u5ba2\u6237\u7aefB\u5efa\u7acb\u8fde\u63a5
\/\/ \u670d\u52a1\u5668\u4f1a\u5c06\u6211\u7684\u6253\u6d1e\u7528\u7684\u5916\u90e8IP\u548c\u7aef\u53e3\u53f7\u544a\u8bc9\u5ba2\u6237\u7aefB\uff1a
 \u3000\u3000ASSERT ( g_WelcomePkt.dwID > 0 );
ReqConnClientPkt.dwInviterID = g_WelcomePkt.dwID;
ReqConnClientPkt.dwInvitedID = pNewUserLoginPkt->dwID;
if ( Sock.Send ( &ReqConnClientPkt, sizeof(t_ReqConnClientPkt) ) != sizeof(t_ReqConnClientPkt) )
goto finished;
\/\/ \u7b49\u5f85\u670d\u52a1\u5668\u56de\u5e94\uff0c\u5c06\u5ba2\u6237\u7aefB\u7684\u5916\u90e8IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u544a\u8bc9\u6211\uff08\u5ba2\u6237\u7aefA\uff09\uff1a
nRecvBytes = Sock.Receive ( szRecvBuffer, sizeof(szRecvBuffer) );
if ( nRecvBytes > 0 )
{
ASSERT ( nRecvBytes == sizeof(t_SrvReqDirectConnectPkt) );
  \u3000\u3000PACKET_TYPE pePacketType = (PACKET_TYPE<\/em>)szRecvBuffer;
ASSERT ( pePacketType && pePacketType == PACKET_TYPE_TCP_DIRECT_CONNECT ); \u3000\u3000\u3000\u3000Sleep ( 1000 ); \u3000\u3000\u3000\u3000Handle_SrvReqDirectConnect ( (t_SrvReqDirectConnectPkt<\/em>)szRecvBuffer );
printf ( “Handle_SrvReqDirectConnect end” );
}
\/\/ \u5bf9\u65b9\u65ad\u5f00\u8fde\u63a5\u4e86
else
{
goto finished;
}

bRet = TRUE;
finished:
g_pSock_MakeHole = NULL;
return bRet;
}<\/p>\n\n\n\n

\u8fd9\u91cc\u5047\u8bbe\u5ba2\u6237\u7aefA\u5148\u542f\u52a8\uff0c\u5f53\u5ba2\u6237\u7aefB\u542f\u52a8\u540e\u5ba2\u6237\u7aefA\u5c06\u6536\u5230\u670d\u52a1\u5668S\u7684\u65b0\u5ba2\u6237\u7aef\u767b\u5f55\u7684\u901a\u77e5\uff0c\u5e76\u5f97\u5230\u5ba2\u6237\u7aefB\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\uff0c\u5ba2\u6237\u7aefA\u542f\u52a8\u7ebf\u7a0b\u8fde\u63a5S\u7684\u3010\u534f\u52a9\u6253\u6d1e\u3011\u7aef\u53e3(\u672c\u5730\u7aef\u53e3\u53f7\u53ef\u4ee5\u7528GetSocketName()\u51fd\u6570\u53d6\u5f97\uff0c\u5047\u8bbe\u4e3aM)\uff0c\u8bf7\u6c42S\u534f\u52a9TCP\u6253\u6d1e\uff0c\u7136\u540e\u542f\u52a8\u7ebf\u7a0b\u4fa6\u542c\u8be5\u672c\u5730\u7aef\u53e3\uff08\u524d\u9762\u5047\u8bbe\u7684M\uff09\u4e0a\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u7136\u540e\u7b49\u5f85\u670d\u52a1\u5668\u7684\u56de\u5e94\u3002<\/p>\n\n\n\n

\/\/
\/\/ \u5ba2\u6237\u7aefA\u8bf7\u6c42\u6211\uff08\u670d\u52a1\u5668\uff09\u534f\u52a9\u8fde\u63a5\u5ba2\u6237\u7aefB\uff0c\u8fd9\u4e2a\u5305\u5e94\u8be5\u5728\u6253\u6d1eSocket\u4e2d\u6536\u5230
\/\/
BOOL CSockClient::Handle_ReqConnClientPkt(t_ReqConnClientPkt *pReqConnClientPkt)
{
ASSERT ( !m_bMainConn );
CSockClient *pSockClient_B = FindSocketClient ( pReqConnClientPkt->dwInvitedID );
  \u3000if ( !pSockClient_B ) return FALSE;
printf ( “%s:%u:%u invite %s:%u:%u connection”,<\/p>\n\n\n\n

        m_csPeerAddress, m_nPeerPort, m_dwID,<\/p>\n\n\n\n

pSockClient_B->m_csPeerAddress,<\/p>\n\n\n\n

        pSockClient_B->m_nPeerPort,<\/p>\n\n\n\n

        pSockClient_B->m_dwID );
\/\/ \u5ba2\u6237\u7aefA\u60f3\u8981\u548c\u5ba2\u6237\u7aefB\u5efa\u7acb\u76f4\u63a5\u7684TCP\u8fde\u63a5\uff0c\u670d\u52a1\u5668\u8d1f\u8d23\u5c06A\u7684\u5916\u90e8IP\u548c\u7aef\u53e3\u53f7\u544a\u8bc9\u7ed9B:
t_SrvReqMakeHolePkt SrvReqMakeHolePkt;
SrvReqMakeHolePkt.dwInviterID = pReqConnClientPkt->dwInviterID;
 \u3000 SrvReqMakeHolePkt.dwInviterHoleID = m_dwID;
  SrvReqMakeHolePkt.dwInvitedID = pReqConnClientPkt->dwInvitedID;
STRNCPY_CS ( SrvReqMakeHolePkt.szClientHoleIP, m_csPeerAddress );
SrvReqMakeHolePkt.nClientHolePort = m_nPeerPort;
if ( pSockClient_B->SendChunk ( &SrvReqMakeHolePkt, sizeof(t_SrvReqMakeHolePkt), 0 ) != sizeof(t_SrvReqMakeHolePkt) )
return FALSE;
\/\/ \u7b49\u5f85\u5ba2\u6237\u7aefB\u6253\u6d1e\u5b8c\u6210\uff0c\u5b8c\u6210\u4ee5\u540e\u901a\u77e5\u5ba2\u6237\u7aefA\u76f4\u63a5\u8fde\u63a5\u5ba2\u6237\u7aef\u5916\u90e8IP\u548c\u7aef\u53e3\u53f7
if ( !HANDLE_IS_VALID(m_hEvtWaitClientBHole) )
return FALSE;
if ( WaitForSingleObject ( m_hEvtWaitClientBHole, 6000*1000 ) == WAIT_OBJECT_0 )
{
if ( SendChunk (&m_SrvReqDirectConnectPkt, sizeof(t_SrvReqDirectConnectPkt), 0)
== sizeof(t_SrvReqDirectConnectPkt) )
return TRUE;
}
return FALSE;
}<\/p>\n\n\n\n

\u670d\u52a1\u5668S\u6536\u5230\u5ba2\u6237\u7aefA\u7684\u534f\u52a9\u6253\u6d1e\u8bf7\u6c42\u540e\u901a\u77e5\u5ba2\u6237\u7aefB\uff0c\u8981\u6c42\u5ba2\u6237\u7aefB\u5411\u5ba2\u6237\u7aefA\u6253\u6d1e\uff0c\u5373\u8ba9\u5ba2\u6237\u7aefB\u5c1d\u8bd5\u4e0e\u5ba2\u6237\u7aefA\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\u8fdb\u884cconnect\u3002<\/p>\n\n\n\n

\/\/
\/\/ \u6267\u884c\u8005\uff1a\u5ba2\u6237\u7aefB
\/\/ \u5904\u7406\u670d\u52a1\u5668\u8981\u6211\uff08\u5ba2\u6237\u7aefB\uff09\u5411\u53e6\u5916\u4e00\u4e2a\u5ba2\u6237\u7aef\uff08A\uff09\u6253\u6d1e\uff0c\u6253\u6d1e\u64cd\u4f5c\u5728\u7ebf\u7a0b\u4e2d\u8fdb\u884c\u3002
\/\/ \u5148\u8fde\u63a5\u670d\u52a1\u5668\u534f\u52a9\u6253\u6d1e\u7684\u7aef\u53e3\u53f7 SRV_TCP_HOLE_PORT \uff0c\u901a\u8fc7\u670d\u52a1\u5668\u544a\u8bc9\u5ba2\u6237\u7aefA\u6211\uff08\u5ba2\u6237\u7aefB\uff09\u7684\u5916\u90e8IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u7136\u540e\u542f\u52a8\u7ebf\u7a0b\u8fdb\u884c\u6253\u6d1e\uff0c
\/\/ \u5ba2\u6237\u7aefA\u5728\u6536\u5230\u8fd9\u4e9b\u4fe1\u606f\u4ee5\u540e\u4f1a\u53d1\u8d77\u5bf9\u6211\uff08\u5ba2\u6237\u7aefB\uff09\u7684\u5916\u90e8IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\u7684\u8fde\u63a5\uff08\u8fd9\u4e2a\u8fde\u63a5\u5728\u5ba2\u6237\u7aefB\u6253\u6d1e\u5b8c\u6210\u4ee5\u540e\u8fdb\u884c\uff0c\u6240\u4ee5
\/\/ \u5ba2\u6237\u7aefB\u7684NAT\u4e0d\u4f1a\u4e22\u5f03\u8fd9\u4e2aSYN\u5305\uff0c\u4ece\u800c\u8fde\u63a5\u80fd\u5efa\u7acb\uff09
\/\/
BOOL Handle_SrvReqMakeHole(CSocket &MainSock, t_SrvReqMakeHolePkt *pSrvReqMakeHolePkt)
{
ASSERT ( pSrvReqMakeHolePkt );
\/\/ \u521b\u5efaSocket\uff0c\u8fde\u63a5\u670d\u52a1\u5668\u534f\u52a9\u6253\u6d1e\u7684\u7aef\u53e3\u53f7 SRV_TCP_HOLE_PORT\uff0c\u8fde\u63a5\u5efa\u7acb\u4ee5\u540e\u53d1\u9001\u4e00\u4e2a\u65ad\u5f00\u8fde\u63a5\u7684\u8bf7\u6c42\u7ed9\u670d\u52a1\u5668\uff0c\u7136\u540e\u8fde\u63a5\u65ad\u5f00
\/\/ \u8fd9\u91cc\u8fde\u63a5\u7684\u76ee\u7684\u662f\u8ba9\u670d\u52a1\u5668\u77e5\u9053\u6211\uff08\u5ba2\u6237\u7aefB\uff09\u7684\u5916\u90e8IP\u5730\u5740\u548c\u7aef\u53e3\u53f7\uff0c\u4ee5\u901a\u77e5\u5ba2\u6237\u7aefA
CSocket Sock;
try
{
if ( !Sock.Create () )
{
printf ( “Create socket failed : %s”, hwFormatMessage(GetLastError()) );
return FALSE;
}
if ( !Sock.Connect ( g_pServerAddess, SRV_TCP_HOLE_PORT ) )
{
printf ( “Connect to [%s:%d] failed : %s”, g_pServerAddess,
SRV_TCP_HOLE_PORT, hwFormatMessage(GetLastError()) );
return FALSE;
}
}
catch ( CException e )
{
char szError[255] = {0};
  \u3000\u3000\u3000e.GetErrorMessage( szError, sizeof(szError) );
printf ( “Exception occur, %s”, szError );
return FALSE;
}
CString csSocketAddress;
ASSERT ( g_nHolePort == 0 );
VERIFY ( Sock.GetSockName ( csSocketAddress, g_nHolePort ) );
\/\/ \u8fde\u63a5\u670d\u52a1\u5668\u534f\u52a9\u6253\u6d1e\u7684\u7aef\u53e3\u53f7 SRV_TCP_HOLE_PORT\uff0c\u53d1\u9001\u4e00\u4e2a\u65ad\u5f00\u8fde\u63a5\u7684\u8bf7\u6c42\uff0c\u7136\u540e\u5c06\u8fde\u63a5\u65ad\u5f00\uff0c\u670d\u52a1\u5668\u5728\u6536\u5230\u8fd9\u4e2a\u5305\u7684\u65f6\u5019\u4e5f\u4f1a\u5c06
\/\/ \u8fde\u63a5\u65ad\u5f00
t_ReqSrvDisconnectPkt ReqSrvDisconnectPkt;
ReqSrvDisconnectPkt.dwInviterID = pSrvReqMakeHolePkt->dwInvitedID;
ReqSrvDisconnectPkt.dwInviterHoleID = pSrvReqMakeHolePkt->dwInviterHoleID;
ReqSrvDisconnectPkt.dwInvitedID = pSrvReqMakeHolePkt->dwInvitedID;
ASSERT ( ReqSrvDisconnectPkt.dwInvitedID == g_WelcomePkt.dwID );
if ( Sock.Send ( &ReqSrvDisconnectPkt, sizeof(t_ReqSrvDisconnectPkt) ) != sizeof(t_ReqSrvDisconnectPkt) )
return FALSE;
Sleep ( 100 );
Sock.Close ();
\/\/ \u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5411\u5ba2\u6237\u7aefA\u7684\u5916\u90e8IP\u5730\u5740\u3001\u7aef\u53e3\u53f7\u6253\u6d1e
t_SrvReqMakeHolePkt *pSrvReqMakeHolePkt_New = new t_SrvReqMakeHolePkt;
if ( !pSrvReqMakeHolePkt_New ) return FALSE;
memcpy (pSrvReqMakeHolePkt_New, pSrvReqMakeHolePkt, sizeof(t_SrvReqMakeHolePkt));
DWORD dwThreadID = 0;
g_hThread_MakeHole = ::CreateThread ( NULL, 0, ::ThreadProc_MakeHole,
         LPVOID(pSrvReqMakeHolePkt_New), 0, &dwThreadID );
if (!HANDLE_IS_VALID(g_hThread_MakeHole) )<\/p>\n\n\n\n

         return FALSE;
\/\/ \u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u4fa6\u542c\u7aef\u53e3 g_nHolePort \u7684\u8fde\u63a5\u8bf7\u6c42
dwThreadID = 0;
g_hThread_Listen = ::CreateThread ( NULL, 0, ::ThreadProc_Listen, LPVOID(NULL), 0, &dwThreadID );
if (!HANDLE_IS_VALID(g_hThread_Listen) )<\/p>\n\n\n\n

         return FALSE;<\/p>\n\n\n\n

     \/\/ \u7b49\u5f85\u6253\u6d1e\u548c\u4fa6\u542c\u5b8c\u6210
HANDLE hEvtAry[] = { g_hEvt_ListenFinished, g_hEvt_MakeHoleFinished };
if ( ::WaitForMultipleObjects ( LENGTH(hEvtAry), hEvtAry, TRUE, 30*1000 ) == WAIT_TIMEOUT )
return FALSE;
t_HoleListenReadyPkt HoleListenReadyPkt;
HoleListenReadyPkt.dwInvitedID = pSrvReqMakeHolePkt->dwInvitedID;
HoleListenReadyPkt.dwInviterHoleID = pSrvReqMakeHolePkt->dwInviterHoleID;
HoleListenReadyPkt.dwInvitedID = pSrvReqMakeHolePkt->dwInvitedID;
if ( MainSock.Send ( &HoleListenReadyPkt, sizeof(t_HoleListenReadyPkt) ) != sizeof(t_HoleListenReadyPkt) )
{
printf ( “Send HoleListenReadyPkt to %s:%u failed : %s”,
    \u3000\u3000\u3000\u3000 g_WelcomePkt.szClientIP, g_WelcomePkt.nClientPort,
hwFormatMessage(GetLastError()) );
return FALSE;
}

return TRUE;
}<\/p>\n\n\n\n

\u5ba2\u6237\u7aefB\u6536\u5230\u670d\u52a1\u5668S\u7684\u6253\u6d1e\u901a\u77e5\u540e\uff0c\u5148\u8fde\u63a5S\u7684\u3010\u534f\u52a9\u6253\u6d1e\u3011\u7aef\u53e3\u53f7\uff08\u672c\u5730\u7aef\u53e3\u53f7\u53ef\u4ee5\u7528 GetSocketName()\u51fd\u6570\u53d6\u5f97\uff0c\u5047\u8bbe\u4e3aX\uff09\uff0c\u542f\u52a8\u7ebf\u7a0b\u5c1d\u8bd5\u8fde\u63a5\u5ba2\u6237\u7aefA\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\u53f7\uff0c\u6839\u636e\u8def\u7531\u5668\u4e0d\u540c\uff0c\u8fde\u63a5\u60c5\u51b5\u5404\u5f02\uff0c\u5982\u679c\u8fd0\u6c14\u597d\u76f4\u63a5\u8fde\u63a5\u5c31\u6210\u529f\u4e86\uff0c\u5373\u4f7f\u8fde\u63a5\u5931\u8d25\uff0c\u4f46\u6253\u6d1e\u4fbf\u5b8c\u6210\u4e86\u3002\u540c\u65f6\u8fd8\u8981\u542f\u52a8\u7ebf\u7a0b\u5728\u76f8\u540c\u7684\u7aef\u53e3\uff08\u5373\u4e0eS\u7684\u3010\u534f\u52a9\u6253\u6d1e\u3011\u7aef\u53e3\u53f7\u5efa\u7acb\u8fde\u63a5\u7684\u672c\u5730\u7aef\u53e3\u53f7X\uff09\u4e0a\u4fa6\u542c\u5230\u6765\u7684\u8fde\u63a5\uff0c\u7b49\u5f85\u5ba2\u6237\u7aefA\u76f4\u63a5\u8fde\u63a5\u8be5\u7aef\u53e3\u53f7\u3002<\/p>\n\n\n\n

\/\/
\/\/ \u6267\u884c\u8005\uff1a\u5ba2\u6237\u7aefA
\/\/ \u670d\u52a1\u5668\u8981\u6c42\u4e3b\u52a8\u7aef\uff08\u5ba2\u6237\u7aefA\uff09\u76f4\u63a5\u8fde\u63a5\u88ab\u52a8\u7aef\uff08\u5ba2\u6237\u7aefB\uff09\u7684\u5916\u90e8IP\u548c\u7aef\u53e3\u53f7
\/\/
BOOL Handle_SrvReqDirectConnect ( t_SrvReqDirectConnectPkt *pSrvReqDirectConnectPkt )
{
ASSERT ( pSrvReqDirectConnectPkt );
printf ( “You can connect direct to ( IP:%s\u3000PORT:%d\u3000ID:%u )”,<\/p>\n\n\n\n

        pSrvReqDirectConnectPkt->szInvitedIP,
pSrvReqDirectConnectPkt->nInvitedPort, pSrvReqDirectConnectPkt->dwInvitedID );
\/\/ \u76f4\u63a5\u4e0e\u5ba2\u6237\u7aefB\u5efa\u7acbTCP\u8fde\u63a5\uff0c\u5982\u679c\u8fde\u63a5\u6210\u529f\u8bf4\u660eTCP\u6253\u6d1e\u5df2\u7ecf\u6210\u529f\u4e86\u3002
CSocket Sock;
try
{
if ( !Sock.Socket () )
{
printf ( “Create socket failed : %s”, hwFormatMessage(GetLastError()) );
return FALSE;
}
UINT nOptValue = 1;
if ( !Sock.SetSockOpt ( SO_REUSEADDR, &nOptValue , sizeof(UINT) ) )
{
printf( “SetSockOpt socket failed : %s”, hwFormatMessage(GetLastError()));
return FALSE;
}
if ( !Sock.Bind ( g_nHolePort ) )
{
printf ( “Bind socket failed : %s”, hwFormatMessage(GetLastError()) );
return FALSE;
}
for ( int ii=0; ii<100; ii++ ) \u3000\u3000\u3000\u3000{ \u3000 \u3000\u3000\u3000\u3000\u3000if ( WaitForSingleObject ( g_hEvt_ConnectOK, 0 ) == WAIT_OBJECT_0 ) \u3000 \u3000\u3000\u3000\u3000\u3000\u3000\u3000break; \u3000\u3000\u3000\u3000\u3000\u3000DWORD dwArg = 1; \u3000\u3000\u3000\u3000\u3000\u3000if ( !Sock.IOCtl ( FIONBIO, &dwArg ) ) \u3000\u3000\u3000\u3000\u3000\u3000{ \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000printf ( “IOCtl failed : %s”, hwFormatMessage(GetLastError()) ); \u3000\u3000\u3000\u3000\u3000\u3000} \u3000\u3000\u3000\u3000\u3000\u3000if ( !Sock.Connect ( pSrvReqDirectConnectPkt->szInvitedIP, pSrvReqDirectConnectPkt->nInvitedPort ) )
{
printf ( “Connect to [%s:%d] failed : %s”,
pSrvReqDirectConnectPkt->szInvitedIP,
pSrvReqDirectConnectPkt->nInvitedPort,
hwFormatMessage(GetLastError()) );
Sleep (100);
}
else<\/p>\n\n\n\n

                break;
}
if ( WaitForSingleObject ( g_hEvt_ConnectOK, 0 ) != WAIT_OBJECT_0 )
{
if ( HANDLE_IS_VALID ( g_hEvt_ConnectOK ) )<\/p>\n\n\n\n

              SetEvent ( g_hEvt_ConnectOK );
printf ( “Connect to [%s:%d] successfully !!!”,
    \u3000\u3000\u3000\u3000\u3000\u3000 pSrvReqDirectConnectPkt->szInvitedIP,<\/p>\n\n\n\n

                pSrvReqDirectConnectPkt->nInvitedPort );

\/\/ \u63a5\u6536\u6d4b\u8bd5\u6570\u636e
printf ( “Receiving data \u2026” );
char szRecvBuffer[NET_BUFFER_SIZE] = {0};
int nRecvBytes = 0;
  \u3000\u3000for ( int i=0; i<1000; i++ ) \u3000\u3000\u3000\u3000\u3000\u3000{ \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000nRecvBytes = Sock.Receive ( szRecvBuffer, sizeof(szRecvBuffer) ); \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000if ( nRecvBytes > 0 )
{
printf ( “–>>> Received Data : %s”, szRecvBuffer );
memset ( szRecvBuffer, 0, sizeof(szRecvBuffer) );
SLEEP_BREAK ( 1 );
}
else
{
SLEEP_BREAK ( 300 );
}
}
}
}
catch ( CException e )
{
  \u3000 char szError[255] = {0};
e.GetErrorMessage( szError, sizeof(szError) );
printf ( “Exception occur, %s”, szError );
  \u3000\u3000\u3000return FALSE;
}
return TRUE;
}<\/p>\n\n\n\n

\u5728\u5ba2\u6237\u7aefB\u6253\u6d1e\u548c\u4fa6\u542c\u51c6\u5907\u597d\u4ee5\u540e\uff0c\u670d\u52a1\u5668S\u56de\u590d\u5ba2\u6237\u7aefA\uff0c\u5ba2\u6237\u7aefA\u4fbf\u76f4\u63a5\u4e0e\u5ba2\u6237\u7aefB\u7684\u516c\u7f51IP\u548c\u7aef\u53e3\u8fdb\u884c\u8fde\u63a5\uff0c\u6536\u53d1\u6570\u636e\u53ef\u4ee5\u6b63\u5e38\u8fdb\u884c\uff0c\u4e3a\u4e86\u6d4b\u8bd5\u662f\u5426\u771f\u6b63\u5730\u76f4\u63a5TCP\u8fde\u63a5\uff0c\u5728\u6570\u636e\u6536\u53d1\u8fc7\u7a0b\u4e2d\u53ef\u4ee5\u5c06\u670d\u52a1\u5668S\u5f3a\u884c\u7ec8\u6b62\uff0c\u770b\u662f\u5426\u6570\u636e\u6536\u53d1\u8fd8\u6b63\u5e38\u8fdb\u884c\u7740\u3002
<\/p>\n","protected":false},"excerpt":{"rendered":"

[\u8f6c\u81ea] https:\/\/blog.csdn.net\/zhongguoren66 …<\/p>\n

\u7ee7\u7eed\u9605\u8bfb »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2143","post","type-post","status-publish","format-standard","hentry","category-moo"],"_links":{"self":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2143"}],"version-history":[{"count":3,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions"}],"predecessor-version":[{"id":2153,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2143\/revisions\/2153"}],"wp:attachment":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}