Reported at https://bugs.debian.org/886133. The current parsing for the MPLS header in examples/ndpi_util.c has multiple issues: - the bitfield order is incorrect for little endian architectures - ntohl() is applied to a 20 bit label, which has unclear purpose - if multiple labels are detected, the while loop parsing labels will never exit due to a missing re-read of the mpls label - the last label is identified by looking inside the label field, while it should be done by looking at the S bit This change fixes the above issues. Notice that bitfield ordering is implementation-dependent, so C bitfields should not be used in the first place to parse network packets.