This patch makes use of the newly introduced sbcap library, and
introduces new code (and extends existing one) to handle all the aspects
of MME peers talking SBc-AP and its underlaying SCTP connection.
This commit doesn't aim to implement all the SBc-AP features, but to
implement a minimal subset of features already available for CBSP in
osmo-cbc, in order to have similar support level for both 2G and 4G
networks.
Related: OS#4945
Change-Id: Ib278bc1d1a74459814016fef7a8fe21cc29d46c9
This commit adds some minimum unit tests to validate encoding and
decoding of SBc-AP ASN.1 APER format is working properly.
Related: OS#4945
Change-Id: I5a26d008b7282da637c3781ae77435c6a69cf65d
This commit adds initial support to encode/decode SBc-AP messages in the
form of a library, under src/sbcap/ (includes in
include/osmocom/sbcap/).
asn1c is used to generate all suport code and structures for ASN.1 APER
encoding/decoding, based on asn files obtained from 3GPP TS 29.168 and
stored under src/sbcap/asn1/.
Currently, mainstream asn1c doesn't yet support ASN.1 APER
encoding/decoding, hence mouse07410 's fork is used [1]. Furthermore,
several encdoing/decoding bugs where found during the process and fixed,
which means asn1.c git >= 30219de2d3da888b4f1eea0dd79f2a505000401a must
be used to generate proper code.
A new "make -C src/ gen" target is added which can be used to regenerate
all C code from the available ASN.1 files in src/sbcap/asn1/*.asn (after
properly setting configure.ac ASN_* variables if needed).
[1] https://github.com/mouse07410/asn1c
Related: OS#4945
Change-Id: If76f8619a9b2d46af6d94b8ae49348b8514e53aa
So far we couldn't depend on proper versions as they had not been
released yet. Now they do, so we can add the respective dependencies
Change-Id: I0573a151f55488599a01ea9dfdcfa02396cd6c35
Pau Espin
Oliver Smith
Harald Welte