Replace broken ipa_ccm_idtag APIs with new ipa_ccm_id ones
ipa_ccm_idtag_parse_off is broken, and can only be used with
len_offset=1 on ID Request messages, otherwise won't work correctly.
Modify ipa_ccm_idtag_parse to at least parse those correctly, and
document the limitations.
Those two functions are already deprecated and only used in openbsc by 3
callers:
* ipa_ccm_idtag_parse in ussd_read_cb(): Broken, that function can only
work for Requests and it's used to parse a Response.
* ipa_ccm_idtag_parse_off in forward_sccp_to_msc (NAT): Broken, it can
only be used to parse Requests and it's used to parse a Response.
Furthermore, len_offset=2 is passed which makes no sense and most
probably it fails always, or can even make the program crash.
* ipa_ccm_idtag_parse_off in (answer_challenge): This one is fine and
could actually be replaced with ipa_ccm_id_get_parse after libosmocore
commit (see below) is merged.
See libosmocore I6efc852dfc041192f554e41a58290a0f63298021 for more information.
As a consequence of the fixes, osmo-bsc-nat now parses messages sent
from VTY test correctly and thus it goes into processing them instead of
silently dropping them. As a result, some VTY tests fail because they
are sending incorrect format (missing NULL char in unit id strings) and
osmo-bsc-nat closses its connection (due to bad auth).
Change-Id: I3b995f8ef0b48c0a5b3375e42926641934359cd2
4 files changed