[lwip-devel] [task #6849] Test how checksum on copy could be integrated into the stack

[Simon Goldschmidt]

Follow-up Comment #15, task #6849 (project lwip):

When implementing udp_send_chksum, to prevent duplicating code, we'd have to
separate calculating the checksum of (pbuf-)data from calculating the header
checksum. Then, udp_send would first calculate the checksum and then go the
same path as udp_send_checksum.

We might then want to create an inet_chksum_pseudo that operate on a
void-pointer instead of a pbuf, since headers area always in the first pbuf
(old inet_chksum_pseudo is still used for RX).

tcp_write_chksum is slightly harder to implement as it we cannot split the
data into segments as we want but have to create new segments based on the
given data length.

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