Hi All, Does anyone know whether the keep-alive feature in LWIP TCP actually works, and if so, are there any unusual limitations?
I have a system described here https://www.eevblog.com/forum/networking/sockets-keep-alive-and-vpns/ comprising of a client and a server (both embedded, LWIP/FreeRTOS, STM 32F417). The KA option is apparently enabled with the calls described in the above link, and it seems to do "something" (in that if running this over a VPN, the VPN remains UP, instead of hanging up after some time) but if say the server is rebooted during a connection, the connection is not re-established. Maybe that is how it is supposed to work i.e. if one wanted to re-establish a connection in such a situation, the client should be sending out regular "real" packets, not KA packets. Needless to say I have googled everywhere and all I find is people having problems with LWIP KA but nobody posting solutions. Thank you in advance, Peter _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
