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
1 file changed
tree: ede9c334cd59e4f762aa21672c8670bdc5a115bd
  1. contrib/
  2. debian/
  3. openbsc/
  4. .gitignore
  5. .gitreview
  6. .mailmap