This was found in interop testing. We have to add number of
bytes to fill up four that are not provided by the payload
but nothing if the rest is zero.
Fix the code to set the number of consumed bytes correctly
and return the number of bytes consumed for for the address.
Add a simple but expandable test case to test the SCCP address
This allows to identify the sccp connection and send the SCCP
payload down to a different stream depending on the connection. It
will be used by the bsc_msc_ip to keep multiple MSC connections
open.
SCCP can be wrapped inside the MTP Level3, and one can
use it for link testing as well. This repository should
be renamed to libosmo-itu or libosmo-ss7 and be a host
to SS7 related encapsulation...
The code is coming from the cellmgr-ng code.
* Introduce a method to set the value of the debug area to
use and default it to -1. Turn the DSCCP enum into a local
variable to make the log messages work.
* Remove usage of openbsc and libbsc.a
E.g. when the underlying connection transport medium is gone
one needs to force to close SCCP connections, add this helper.
It will remove the connection from the list of connections and
it will free the data.
Instead of deleting the msgb within the SCCP library the implementor
of the write callback needs to free it. This is required for non
blocking io with the server.
This library is intended to collect all generic/common funcitionality
of all Osmocom.org projects, including OpenBSC but also OsmocomBB
The library currently includes the following modules:
bitvec, comp128, gsm_utils, msgb, select, signal, statistics, talloc, timer,
tlv_parse, linuxlist
msgb allocation error debugging had to be temporarily disabled as it depends on
'debug.c' functionality which at the moment remains in OpenBSC
Using msgb->data only works as long as msgb->data == msgb->l2h.. In
the case of receiving a MSU unit from a E1 link, or even receiving
the IPA header we will have some non SCCP data at msgb->data and then
cast garbage to what we think is making sense..
Use msgb->l2h and everything is fine.
Currently this will send a dummy inactivity test message,
there is currently no parsing or API to receive the messages.
The sequencing and credit entries are empty as sequencing
is currently not used at all.
The test is currently limited to send the message and see
if the application is crashing or not.
include/sccp/sccp_types.h contain Q.713 and GSM definitions
include/sccp/sccp.h is the application interface resembling
the esentials of the UNIX socket interface.
src/sccp.c is the actual implementation of SCCP featuring
connection and UDT1 support.
tests/sccp/sccp.c is testing connection creation and formating
of the SCCP messages used by the A-interface. And
it contains a simple fuzzing test to test the
robustnes of the implementation.
Holger Hans Peter Freyther