UDP多播使用winsock API XP和Vista之间的差异 [英] UDP multicast using winsock API differences between XP and Vista
问题描述
似乎是在Windows XP和Windows vista之间设置UDP多播套接字所需的实现已经改变。具体来说：
$ c$ b
-
在Windows XP下，您必须呼叫
bind -
但是，在Windows vista下，您不能
p>这两个点中的任何一个在运行时都会导致套接字错误。
我会疯了，还是有其他人看到这个？是否有更好的解决方案比条件编译的bind（）调用？
解决方案 $ c> setsockopt（）
调用您要申请 IP_ADD_MEMBERSHIP 并加入多播群组？ 我刚刚在我的服务器框架中运行一些测试，我注意到我在Windows 7上调用 bind（）（我没有Vista盒对手），然后我也可以如预期一样加入多播组，只要绑定地址和多播地址都有效。
然而，我不能使用 INADDR_ANY 调用bind（），因为这会导致多播组加入失败错误10022（ WSAEINVAL ），如果多播组地址不是有效的多播地址，则调用失败，错误10049（ WSAEADDRNOTAVAIL ）。
我现在正在启动一个XP盒...
[在XP测试后编辑]
在XP上， bind（） c $ c> INADDR_ANY ，使用无效的多播地址是合法的。所以，我期望，你正在做的其中一个，因此它适用于XP而不是Vista / Win7。
所以，你得到什么错误和什么地址你绑定到？
It seems to be that the implementation required to set up a UDP multicast socket has changed between windows XP and windows vista. Specifically:
Under windows XP, you must call
bind()before you can reference any multicast-specific socket options.However, under windows vista, you must not call
bind()when dealing with multicast sockets.
Failing either of these two points results in a socket error at runtime.
Am I going crazy, or have other people seen this as well? Is there a better solution than conditional compilation of the bind() call?
What error are you getting from the setsockopt() call that you make to apply IP_ADD_MEMBERSHIP and join the multicast group?
I've just run some tests here with my server framework and I note that I DO call bind() on Windows 7 (I don't have a Vista box to hand) and I can then also join a multicast group as expected as long as both the binding address and the multicast address are valid.
However I cannot call bind() with INADDR_ANY, as that causes the joining of the multicast group to fail with error 10022 (WSAEINVAL) and if the multicast group address isn't a valid multicast address the call fails with error 10049 (WSAEADDRNOTAVAIL). Which all seems fair enough.
I'm booting an XP box now...
[Edited after testing on XP]
On XP it's legal to bind() to INADDR_ANY and it's legal to use invalid multicast addresses. So, I expect, you're doing one of those and it therefore works on XP and not on Vista/Win7.
So, what error are you getting and what address are you binding to?
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