Moreover:
Add a ndo_protocol field assignment.
Add a 'summary' comment with the protocol name.
Use ND_PRINT instead of printf.
Remove an useless comment.
Use the nd_print_trunc macro.
Simplify some pointer expressions.
InfiniBand support for tcpdump.
This is an in-house patch. Sent upstream for potential inclusion in future
versions of tcpdump.
(also adding print-ipoib.c to CMakeLists.txt, asked by @guyharris)
(s/u_int16_t/uint16_t asked by @guyharris)