Osmocom Libraries » libosmo-sccp + libosmo-sigtran

In my test setup, without change of config, osmo-bsc suddenly does not connect to the STP anymore:

DLSS7 ERROR 0: asp-asp-clnt-msc-0: Unable to open stream client for ASP asp-clnt-msc-0 (osmo_ss7.c:1315)

and then obviously it keeps cycling through attempting to send a BSSMAP RESET to the MSC which never happens.

I've bisected this down to this commit being the causing change:

libosmo-sccp

commit 80b135581909fef595d48436ab04dbcb147e3895
Refs: [HEAD], [refs/bisect/bad], 1.1.0-15-g80b1355
Author:     Pau Espin Pedrol <pespin@sysmocom.de>
AuthorDate: Fri Oct 11 17:58:07 2019 +0200
Commit:     laforge <laforge@osmocom.org>
CommitDate: Tue Oct 22 19:38:53 2019 +0000

    ss7: Support multiple addresses in SCTP connections

My osmo-bsc.cfg, extract:

cs7 instance 0
 point-code 0.23.3
 asp asp-clnt-msc-0 2905 0 m3ua

After bisecting, I notice:
If I remove the line 'asp asp-clnt-msc-0 2905 0 m3ua', it works again.

How does this line manage to break connecting after this patch?
Can we make it so that it also still works even if such a line is in the config?