gbproxy: Copy uplink messages to SGSN 2

Some messages that are related to the BVC itself must be forwarded to
the secondary SGSN, too.

This patch implements this for BVC-RESET (BVCI != 0) and FLOW-CONTROL-BVC
messages. The resulting acknowledgement messages from the secondary
SGSN are silently dropped. The idea behind this is that the primary
SGSN is responsible for setting up and maintaining the BVC whereas
the secondary SGSN is rather passive and just has to accept it.

Ticket: OW#1258
Sponsored-by: On-Waves ehf
2 files changed
tree: 6e1bf95f655fe337c20cdc2cc58330eaa98eb3a9
  1. debian/
  2. hlrsync/
  3. linux-kernel/
  4. openbsc/
  5. wireshark/
  6. README