摘要：
RFC http://www.ietf.org/rfc/rfc5905.txt https://www.eecis.udel.edu/~mills/ntp/html/select.html https://wenku.baidu.com/view/1539c86a71fe910ef02df83f.h 阅读全文
posted @ 2017-06-10 15:26
苏小北1024
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