Jan Menzel wrote: > In line 21 the shark records a duplicated ACK, which > I've seen a few times already (there is one in line 7 for example.).
I don't know what the reason for the Dup ACK in frame #7 is, but for frame #21, the reason seems to be a corrupted TCP checksum of frame #14. To see what the reason is here, try to: - pass TCP_WRITE_FLAG_COPY to tcp_write() (when using the raw api) - set LWIP_CHECKSUM_ON_COPY to 0 (or LWIP_CHECKSUM_ON_COPY to 1) and see if that helps (and which of the two). Also, I've commited a possible bugfix for LWIP_CHECKSUM_ON_COPY some days ago, maybe that fixes your problem? Simon _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
