tree 4e6bab1f3185ff298597578fa5b81ea8c9b22497
parent fa3b48227796e66d9dd05a53ff4b3062b2c19b46
author Vadim Yanitskiy <axilirator@gmail.com> 1541537583 +0700
committer Vadim Yanitskiy <axilirator@gmail.com> 1541537890 +0700

core/msgb.h: introduce msgb_l4len() helper

There is already a group of similar functions for L1, L2 and L3,
but L4 was missing. The L4 is usually used for parsing of complex
L3 messages, such as SS/USSD and SMS.

This change introduces a similar halper for L4.

Change-Id: I755f2d654bbdad2a8b4f94df9023bdd370b07ae6