sal-stack-lwip does not implement TCP keepalive socket option

ARMmbed / sal-stack-lwip

LwIP package for mbed

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sal-stack-lwip does not implement TCP keepalive socket option #59

Open bremoran opened 8 years ago

bremoran commented 8 years ago

TCP keepalive may be required in some applications. The SAL already supports the SOCKET_OPT_KEEPALIVE option, it just requires implementation in this module.

cc @ansondtx20 @yogpan01

ciarmcom commented 8 years ago

ARM Internal Ref: IOTSFW-2272