VC/MFC
使用api的sendto发送udp数据报时，怎样指定源端口号？
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我也要 关注 + 加入社区在以下程序中，怎样指定源端口号？
DWORD IPAddress;
m_ctrlTargetIP.GetAddress(IPAddress);
WORD wVersion;
WSADATA wsaData;
wVersion = MAKEWORD(2, 1);
if(WSAStartup(wVersion, &wsaData) != 0)
{
MessageBox("Cann't find DLL file !");
return;
}
if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 1)
{
WSACleanup();
MessageBox("Sockt dll file version very low !");
return;
}
SOCKET ClientSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(6005);
addr.sin_addr.S_un.S_addr = ntohl(IPAddress);
char s[256];
memset(s, 0, 256);
strcpy(s, m_sSendText);
int l = strlen(s);
if(sendto(ClientSocket, s, l + 1, MSG_DONTROUTE, (LPSOCKADDR)&addr, sizeof(sockaddr)) != l +1)
{
MessageBox("没有发送成功！");
}
closesocket(ClientSocket);
WSACleanup();
DWORD IPAddress;
m_ctrlTargetIP.GetAddress(IPAddress);
WORD wVersion;
WSADATA wsaData;
wVersion = MAKEWORD(2, 1);
if(WSAStartup(wVersion, &wsaData) != 0)
{
MessageBox("Cann't find DLL file !");
return;
}
if(LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 1)
{
WSACleanup();
MessageBox("Sockt dll file version very low !");
return;
}
SOCKET ClientSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(6005);
addr.sin_addr.S_un.S_addr = ntohl(IPAddress);
char s[256];
memset(s, 0, 256);
strcpy(s, m_sSendText);
int l = strlen(s);
if(sendto(ClientSocket, s, l + 1, MSG_DONTROUTE, (LPSOCKADDR)&addr, sizeof(sockaddr)) != l +1)
{
MessageBox("没有发送成功！");
}
closesocket(ClientSocket);
WSACleanup();
...全文
