[lwip-devel] [bug #50914] TCP server don't update the ack num

[Joel Cunningham]

Follow-up Comment #14, bug #50914 (project lwip):

> Clearly, checksum-on-copy should be faster, which is why it is the default.
However, your log output indicates there's a problem with this and the
generated checksum is off by one. 

I believe checksum-on-copy is off by default.  From opt.h:

/**
 * LWIP_CHECKSUM_ON_COPY==1: Calculate checksum when copying data from
 * application buffers to pbufs.
 */
#if !defined LWIP_CHECKSUM_ON_COPY || defined __DOXYGEN__
#define LWIP_CHECKSUM_ON_COPY           0
#endif


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