参考https://developers.google.com/cloud-messaging/ccs#connecting
我想为 GCM 提供一个基于 XMPP 的服务器。我无法理解“对于每个发件人 ID,GCM 允许 1000 个并行连接”这里连接是什么意思?
is it the connection which my CCS server will make with GCM server ?
is it the connection that each device (ios/android/crome) will make with GCM server ?