我正在尝试编写一些客户端代码,以将UDP数据包发送到具有特定IP地址的另一台计算机。当IP地址设置为home时,它工作正常。我可以使用Wireshark查看发送的数据包。当我放入服务器的IP时,我没有看到任何数据包。经过进一步调查,我发现尝试绑定到套接字时遇到了10049错误。我不太明白为什么我无法绑定到网络上另一台计算机的IP。
string m_port = "2033"; // port that the plugin is talking to
string m_hostIP = "192.168.2.27"; // IP address that the plugin is talking to
// start Windows Sockets
if ((error = WSAStartup(version,&data)) != NO_ERROR)
{
logError("Error: WSAStartup failed with error: ",error);
return;
}
// check if version 2.2 of Winsock is supported
if (LOBYTE(data.wVersion) != 2 || HIBYTE(data.wVersion) != 2)
{
logError("Error: System could not support WinSock 2.2.",0);
// clean up Winsock
if (WSACleanup() == SOCKET_ERROR)
{
logError("Error: Winsock cleanup error: ",WSAGetLastError());
}
return;
}
// create a datagram socket using IPv4 and UDP protocol
if ((m_socket = socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP)) == INVALID_SOCKET)
{
logError("Error: Socket creation failed with error: ",WSAGetLastError());
// clean up Winsock
if (WSACleanup() == SOCKET_ERROR)
{
logError("Error: Winsock cleanup error: ",WSAGetLastError());
}
return;
}
int iSetOption = 1;
if (setsockopt(m_socket,SOL_SOCKET,SO_REUSEADDR,(char*)&iSetOption,sizeof(iSetOption)) == SOCKET_ERROR)
{
logError("Error: Set Socket Options failed with error: ",WSAGetLastError());
// close the socket
if (closesocket(m_socket) == SOCKET_ERROR)
{
logError("Error: Unable to close socket: ",WSAGetLastError());
}
// clean up Winsock
if (WSACleanup() == SOCKET_ERROR)
{
logError("Error: Winsock cleanup error: ",WSAGetLastError());
}
m_socket = INVALID_SOCKET;
return;
}
struct sockaddr_in server_addr; // server address description struct
int server_addr_len = sizeof(server_addr); // size of server address struct
int bytesSent = 0;
memset((char *)&server_addr,server_addr_len); // clear the address struct
server_addr.sin_family = AF_INET; // IPv4 address type
server_addr.sin_port = htons((unsigned short)stoul(m_port)); // port used by the simulator to send the data
server_addr.sin_addr.s_addr = inet_addr(m_hostIP.c_str()); // any server IP address will do
// bind the socket to the address struct
if (::bind(m_socket,(struct sockaddr *) &server_addr,server_addr_len) == SOCKET_ERROR)
{
logError("Error: unable to bind the socket: ",WSAGetLastError());
// close the socket
if (closesocket(m_socket) == SOCKET_ERROR)
{
logError("Error: Unable to close socket: ",WSAGetLastError());
}
// clean up Winsock
if (WSACleanup() == SOCKET_ERROR)
{
logError("Error: Winsock cleanup error: ",WSAGetLastError());
}
m_socket = INVALID_SOCKET;
return;
}