msgb: Add msgb_hexdump() function

This function works like osmo_hexdump() and returns a static buffer
containing hex bytes along with markers for the layers.

Note that it uses osmo_hexdump() internally, thus a call to
msgb_hexdump() invalidates the buffer that has been returned by an
earlier call to osmo_hexdump(). In short: don't mix them in a single
call printf().

Sponsored-by: On-Waves ehf
2 files changed