Osmocom Libraries » libosmocore

(Note: The following comment may or may not be out of date, I'll leave it here for now)

So, I'm currently working on this while waiting for a reply on #5208 , and while I'm not stuck, I wonder if it might be very easy for someone more experienced with this codebase to give me a good pointer...

I'm looking at the code for `show ns` in `libosmocore/src/gb/gprs_ns2_vty.c` and as of now my problem is that from what I can tell the closest to the information we want to print out is a pointer to a `struct gprs_ns2_vc_bind`.
However what we really want is information from the `struct osmo_fsm_inst` field `priv`, which - only in `src/gb/gprs_ns2_vc_fsm.c` - is accessible as a pointer to `struct gprs_ns2_vc_priv`.

There we can find `om_blocked`, and the `state` field telling us if the NSVC is blocked can be found in the `struct osmo_fsm_inst` it came from.

Now my approach would be to find the lines of code where the `nsi` field from the `struct gprs_ns2_vc_bind` is set - based on the assumption, that there, the `struct osmo_fsm_inst` it came from, must be referenced - maybe I'll find it quickly but maybe somebody already knows where it is set so I can save some time.-+

I've gone for a new approach (very briefly: Make the 'om_blocked' field part of the FSM struct, don't hide it in 'priv')

lynxis, I have a patch, do you have any recommendations on where to find/how to quickly set up a multicomponent setup, that includes NSVCs (and an easy way to block them), so I can try the 'show ns' output?
I can get the BSC alone to run, but then 'show ns' has nothing to print.

@arehbein I would recommend using the osmo-nsdummy utility. You have to compile libosmocore with --enable-external-tests.
libosmocore/src/utils/osmo-ns-dummy (it won't be installed).
Then you can start 2x osmo-ns-dummy and configure to connect to each other. I would recommend using ip.access style configuration.
(Taken from ttcn3 tests)

(-p vty port)
./osmo-ns-dummy -p 4240 ./config-a.cfg
./osmo-ns-dummy -p 4241 ./config-b.cfg

ns
 bind udp local
  listen 127.0.0.1 23000
  accept-ipaccess
 bind udp local2
  listen 127.0.0.1 23001
  accept-ipaccess

ns
 bind udp local
  listen 127.0.0.1 22000
 bind udp local2
  listen 127.0.0.1 22001
 nse 1234
  nsvc ipa local 127.0.0.1 23000 nsvci 1234
  nsvc ipa local2 127.0.0.1 23001 nsvci 1235

arehbein wrote in #note-7:

I can get the BSC alone to run, but then 'show ns' has nothing to print.

The BSC is not involved in NS. osmo-pcu, osmo-sgsn and osmo-gbproxy are the network elements implementing NS (well, all using libosmogb for doing that in reality).