This unit tests shows how decoding of such message fails. Fix will be
provided in a follow up patch to make the test pass.
Related: SYS#5891
Change-Id: Ib4ff71d5e01d464febb062c5bfe3e06ee5a19ecd
The function gsm0808_sc_cfg_from_gsm48_mr_cfg() is used to convert a
gsm48 multirate struct into a set of S-bits (S0 to S15). However, the
conversion function currently does not take into account that bit S1
actually stands for four rates at once (Config-NB-Code = 1). Lets make
sure that S1 is only set when the multirate configuration permits all
four required rates.
Change-Id: I6ad531d4e70c2252e32e2bbaca8e14a7ec6d9840
Related: SYS#4470
The function gsm0808_sc_cfg_from_gsm48_mr_cfg() takes an S15 to S0
bitmask and converts that bitmask into an AMR multirate configuration
struct.
Unfortunately the current implementation implements 3GPP TS 28.062,
Table 7.11.3.1.3-2 wrongly in some aspects. Lets fix this.
- Fix wrong interpretation of the bitpatterns
- 5,15K is invalid and must never be selected
- Make sure that no more than 4 rates are selected in the active set
- Extend unit-test
Change-Id: I6fd7f4073b84093742c322752f2fd878d1071e15
Related: SYS#4470
CGI to Cell ID: for example, for Paging, osmo-msc has a CGI for a subscriber
and needs to send out a Cell Identifier IE. Makes sense to add this conversion
here.
Cell ID to CGI: for a Layer 3 Complete, a subscriber sends the current cell in
the form of a Cell Identifier, which we store as a CGI, if necessary enriched
with the local PLMN.
Add enum with bitmask values to identify parts of a CGI, for the return value
of gsm0808_cell_id_to_cgi(). Can't use enum CELL_IDENT for that, because it
doesn't have a value for just a PLMN (and is not a bitmask).
Change-Id: Ib9af67b100c4583342a2103669732dab2e577b04
Add functions to dump LCLS (without GCR) and GCR. Dumping entire struct
results in inconveniently long string hence the separate functions. Both
use talloc functions so they expect caller to take care of providing
proper allocation context and freeing memory.
Change-Id: Ic3609224c8f3282d667e75f68bc20327e36eb9e6
Add
* osmo_lai_cmp() (to use in gsm0808_cell_id_u_matches())
* osmo_cgi_cmp() (to use in gsm0808_cell_id_u_matches())
* gsm0808_cell_id_u_match() (to re-use for single IDs and lists)
* gsm0808_cell_ids_match()
* gsm0808_cell_id_matches_list()
* Unit tests in gsm0808_test.c
Rationale:
For inter-BSC handover, it is interesting to find matches between *differing*
Cell Identity kinds. For example, if a cell as CGI 23-42-3-5, and a HO for
LAC-CI 3-5 should be handled, we need to see the match.
This is most interesting for osmo-msc, i.e. to direct the BSSMAP Handover
Request towards the correct BSC or MSC.
It is also interesting for osmo-bsc's VTY interface, to be able to manage
cells' neighbors and to trigger manual handovers by various Cell Identity
handles, as the user would expect them.
Change-Id: I5535f0d149c2173294538df75764dd181b023312
* add functions to encode Global Call. Ref. from TS 29.205 as 3GPP TS
48.008 §3.2.2.115 information element
* add corresponding tests
Change-Id: I82ce0207dc8de50689a8806c6471ad7fbae6219d
At the moment the all gsm0808 cause codes are encoded directly using the
tlv API directly to put a one byte TLV field. This works ok for most
situations where the cause code consists of a single byte. However,
gsm0808 specifies a two byte cause code model where cause codes may be
extended up to two bytes. Instead of implementing the encoding over and
over and again, let's rather have an encoder function we can call.
- Add an encoder function that can generate single byte and extended
cause codeds and makes the length decision automatically.
- Use only this function to append cause codes
Change-Id: I71d58fad89502a43532f60717ca022c15c73f8bb
* add function to generate cipher mode reject with extended (2-byte)
Cause IE
* add function to get (extended) Cause value
* add corresponding (extended cause) test
* update existing (non-extended cause) test
* use enum as a parameter for existing non-extended version to make
interface more unified
Change-Id: Id5509b94a18180a44f45300caaa02b843c166fa3
Related: OS#3187
Add a function to convert S0-S15 bits to struct gsm48_multi_rate_conf,
which hold the codec settings for AMR.
Change-Id: I973736273c236eee84decf15868190e339c3fed4
Related: OS#3548
Add a function to convert struct gsm48_multi_rate_conf, which holds the
codec settings for AMR, to S0-S15 bit representation as defined in
3GPP TS 48.008 3.2.2.49
This resurrects change-id I4e656731b16621736c7a2f4e64d9ce63b1064e98
which was reverted in I9e0d405e303ed86d23703ca6362e958dddb2f861
due to gsm0808_test failing.
The test failure is fixed by properly clearing the struct
gsm48_multirate_cfg prior to running tests (add memset(0)).
Change-Id: Ia782e21c206c15e840226d79b4209d13658ee916
Related: OS#3548
Add a function to convert struct gsm48_multi_rate_conf, which holds the
codec settings for AMR, to S0-S15 bit representation as defined in
3GPP TS 48.008 3.2.2.49
Change-Id: I4e656731b16621736c7a2f4e64d9ce63b1064e98
Related: OS#3548
Provide comprehensive API to obtain string representations of Cell Identifiers
and -Lists.
Change gsm0808_test.c to use the new functions (which simplifies the output a
bit), so that we don't duplicate printing code in gsm0808_test.c, and so that
the not-so-trivial printing code is also tested.
In gsm0808_test, also test gsm0808_cell_id_list_name_buf()'s return value and
truncation behavior.
The rationale for gsm0808_cell_id_list_name(), i.e. printing an entire list of
cell identifiers, is that even though the maximum is 127 elements, a list of
more than a few elements is hardly ever expected in practice (even more than
one element isn't actually expected: either "entire BSS" or a single LAC). It
is thus useful to log the entire list when it shows up in Paging and Handover.
Change-Id: I9b2106805422f96c5cc96ebb9178451355582df3
Clarify semantics and micro-optimise for the case of single Cell Identifer IEs.
Test in gsm0808_test.c
So far we have gsm0808_enc_cell_id_list2(), but there also exist instances of
single Cell Identifiers (3GPP TS 48.008 3.2.2.17).
It is possible to decode the same using the cell identifier list API, but this
forces the caller to also keep a full struct gsm0808_cell_id_list2 with all its
127 entries around.
E.g. for handover, there are two Cell Identifiers (Serving and Target); I'd
need two full cell id lists for each, and these would be dynamically allocated
for each handover operation, whether it uses them or not.
Related: OS#2283 (inter-BSC HO, BSC side)
Change-Id: I9f9c528965775698ab62ac386af0516192c4b0cc
This will be used by the upcoming neighbor_ident API in osmo-bsc, where the vty
interface allows composing neihbor BSS cell identifier lists, and we want to
allow adding individual items from individual user commands.
It will also be useful to accumulate cell identifiers in case a subscriber sees
multiple alternative cells from a neighboring BSS, and we want to pass these on
to the MSC in a Handover Required.
Related: OS#2283 (inter-BSC HO, BSC side)
Change-Id: I5781f5fa5339c92ab2e2620489b002829d206925
The create function to generate the RESET ACKNOWLEDGE
message is not accessible from outside, as it does not
appear in limosmogsm.map. It also has not testcase.
This commit adds gsm0808_create_reset_ack() to the
map file and also adds a testcase.
Change-Id: I82d3411484f82b4a9205d407fa0442244678f183
gsm0808.h/c lacks functionality to generate BSS_MAP_MSG_ASSIGMENT_RQST messages.
These messages are required if the code is used in an MSC implementation.
This commit adds a gsm0808_create_assignment() function, that generates an
A/AoiP BSS_MAP_MSG_PAGING message.
Change-Id: I4d1d455a1e1cf95407e23ded7b7defbcf2dd6ff0
gsm0808.h/c lacks functionality to generate BSS_MAP_MSG_PAGING messages. These
messages are required if the code is used in an MSC implementation.
This commit adds a gsm0808_create_paging() function, that generates an A/AoiP
BSS_MAP_MSG_PAGING message.
Change-Id: I9afecf0109305ca5153bf081bb29cd94071dd2b7
gsm0808.h/c lacks functionality to generate CIPHER MODE COMMAND messages. These
messages are required if the code is used in an MSC implementation.
This commit adds a gsm0808_create_cipher() function, that generates an A/AoiP
CIPHER MODE COMMAND message.
Change-Id: I8eb1c357860c3e740b0f5d17e1c256bc87920958
the classic A implementation in libosmocore lacks support for AoIP
message elements. This patch adds support for AoIP by adding a set
of new gsm0808_create_..., which support the missing AoIP message
elements
Change-Id: I77f866abec1822d19871052f3c647ad782785b34
This tests verifies the content of the GSM 08.08 messages, it does
not verify the remaining headroom (which the SCCP/IPA code relies
on being plenty to prepend the header). More to come in the future.
Pau Espin
Alexander Chemeris
Philipp Maier
Harald Welte
Neels Hofmeyr