On 14 December 2011 04:31, Kieran Mansley <[email protected]> wrote: > > On 11 Dec 2011, at 14:17, narke wrote: > >> Hi, >> >> In raw API. I am confused how to enable the tcp KEEP-ALIVE feature. >> It's seems the LWIP_TCP_KEEPALIVE switch is not designed for turning >> on or off the feature. It's just for using or not using "keep_intvl" >> and "keep_cnt" fields of a pcb. To my understanding, turning on or >> off the LWIP_TCP_KEEPALIVE switch, makes no difference to the final >> result. >> >> And, according to the 1.4.0 code, the keep-alive segments will be sent >> out only if the so_options of a pcb has a SOF_KEEPALIVE bit set. The >> problem is, I don't find a place in the code that SOF_KEEPALIVE (or >> SO_KEEPALIVE) was set. > > It's part of the sockets API so there isn't a supported way to set it via the > raw API, but you can probably get what you want by doing > > pcb->so_options |= SOF_KEEPALIVE; > > In general modifying pcb fields directly is discouraged but in this case > there isn't an easy alternative. We should probably add a function to allow > users to set these options in a supported manner. > > Kieran
Thanks Kieran. I just had already found my way and did it exactly as what you said. -- Life is the only flaw in an otherwise perfect nonexistence -- Schopenhauer narke public key at http://subkeys.pgp.net:11371 ([email protected]) _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
