Hello Simon I was referring to the following link
http://lwip.wikia.com/wiki/LwIP_Developers_Manual This implementation is only for a single port device, which connects to a switch/router. While the receive part is clear, it is the transmit path that is not clear. In the current implementation netif->linkoutput is already mapped to a function which calls the EMAC driver. I checked the call stack and the transmit call comes from the DHCP during IP address acquisition. So it is not clear where do I insert the LLDP frame? Regards Amit On Wed, Aug 3, 2016 at 2:07 PM, goldsi...@gmx.de <goldsi...@gmx.de> wrote: > Amit Ashara wrote: > >> I would like to develop the Link Layer LLDP stack within lwIP framework. >> > > Cool! > > However the developer's manual link is empty. >> > > I have absolutely *no* idea what this means. > > Any suggestions where to start? >> > > Implementing LLDP is a bit tricky if you have more than one port, as lwIP > sees this as one 'netif' having a single IP address only (but the ports > have a MAC address each, used for LLDP at least). > > That being said, you'll have to send and receive LLDP packets on every > Ethernet port. If you have only one port, send via "netif->linkoutput" and > intercept before calling "ethernet_input()". If you have more than one > port, it gets more tricky and doesn't really fit the lwIP netif concept:-( > > Then, grab lwIP 2.0.0 (RC2 is the current one) and use the MIB-compiler > from "contrib/apps/LwipMibCompiler" to implement the LLDP mib(s?) and feed > the results of rx parsing into that mib. > > I'd be interested in taking a look at the code once it's done! > > > Simon > > _______________________________________________ > lwip-users mailing list > lwip-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/lwip-users >
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