robbiehanson/CocoaAsyncSocket — pull request #116 by eldenchen (2012-12-15 15:00:11+00:00)
Title: Enable keep-alive packets

When the timeout is not specified，the TCP connection will be dead if the connection is terminated unexpectedly.

Because Mac OS X does not have the TCP_KEEPINTVL socket parameter that the interval between packets sent to validate be determined by OS.
Based on my observations, the value is 10 minutes.