c - WTS_CLIENT_ADDRESS 地址无法正确打印

Question

我正在尝试获取登录到计算机的所有 RDP 连接的 IP 地址。我正在使用 WTSEnumerateSessions 和 WTSQuerySessionInformation 来检索指向包含地址的 WTS_CLIENT_ADDRESS 结构的指针。这是代码的一部分:

WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE,
                           SessionNo,
                           WTSClientAddress,
                           &ppBuffer,
                           &pBytesReturned);

address = (WTS_CLIENT_ADDRESS *)ppBuffer;

if (AF_INET == address->AddressFamily)
{
    printf("Client Address : %s\n", (LPSTR)address->Address);
}
else if (AF_INET6 == address->AddressFamily)
{
    //print IPV6
}

我可以获得 AddressFamily 并且值很好，但是当我尝试打印 Address 时出现乱码。 MSDN 说该值是一个空终止字符串，但它不会像它应该的那样打印。这是链接:

https://msdn.microsoft.com/en-us/library/windows/desktop/aa383857(v=vs.85).aspx

我觉得我在这里遗漏了一些东西。

Answer 1

您没有考虑 WTS_INFO_CLASS 中的以下注释文档:

WTSClientAddress
The network type and network address of the client. For more information, see WTS_CLIENT_ADDRESS.

The IP address is offset by two bytes from the start of the Address member of the WTS_CLIENT_ADDRESS structure.

另外，不管文档怎么说，IPv4 地址不是以 null 结尾的字符串!它实际上是 IPv4 地址的原始 4 字节(就像 IPv6 地址是原始字节一样)。

试试这个:

WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE,
                           SessionNo,
                           WTSClientAddress,
                           &ppBuffer,
                           &pBytesReturned);

address = (WTS_CLIENT_ADDRESS *)ppBuffer;

if (AF_INET == address->AddressFamily)
{
    printf("Client Address : %d.%d.%d.%d\n",
        address->Address[2], address->Address[3], address->Address[4], address->Address[5]);
}
else if (AF_INET6 == address->AddressFamily)
{
    //print IPV6
}