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我的cc3200开发板用sl_send固定发送数据“1”给手机tcp客户端，想用sl_send的返回值判断手机的tcp客户端socket连接是否断开，但是当手机客户端断开socket连接，cc3200开发板仍然运行sl_send函数，并且返回值还是正值。请问有什么办法检测socket连接是不是断开？谢谢
论坛有类似问题，解答请看这边： https://e2e.ti.com/support/wireless_connectivity/simplelink_wifi_cc31xx_cc32xx/f/968/t/358975
