Hi all, Current verson of http://lwip.wikia.com/wiki/Porting_for_an_OS#cc.h page containts a statement regarding structure packing: "The common case is using Ethernet interfaces and MEM_ALIGNMENT=4. Ethernet header without VLAN is 14 bytes, so if you can/must have ETH_PAD_SIZE=2, then IP headers and higher layers are 4 bytes aligned and you may not need packing !" It's wrong ! You need structure fields to be packed at least ! Of course, there are may be exceptions like in my case, where my processor is arm cortex-m3 and compiler is gcc. It didn't align structure fields, so packing isn't required. But this is not general case. Correct me if I'm wrong. Otherwise wiki must be corrected.
Regards, Artem Pisarenko _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
