tree ede9c334cd59e4f762aa21672c8670bdc5a115bd
parent 424656e527df460656e46a0430f40c90edec7529
author Harald Welte <laforge@gnumonks.org> 1477967570 +0100
committer Harald Welte <laforge@gnumonks.org> 1478706159 +0000

SGSN: Use dummy all-zero MSISDN value in PDP Context Act on GTP

The GTP protocol specification requires us to include the MSISDN IE in
all non-secondary PDP context activations. However, when no real HLR is
used (e.g. via GSUP), we do not have the MSISDN information available
and so far simply sent a zero-length MSISDN IE in GTP.  The latter is a
violation of the spec.

So to resolve this, we now send a 15-digit all-zero dummy MSISDN IE, as
described in TS 23.003.

Change-Id: I8d0a5d52d6cd2a00b5dda060bd41d45056dfa84d