As part of fixing issue OS#3075, we want to migrate support
for encoding system information from osmo-bsc to libosmocore.
This change ports one of the prerequisites for doing so:
osmo-bsc code for range-encoding ARFCNs, including tests.
An osmo_gsm48_ prefix has been prepended to public symbols in
order to avoid clashes with existing symbols in osmo-bsc code.
Change-Id: Ia220764fba451be5e975ae7c5eefb1a25ac2bf2c
Related: OS#3075
We have gsm48_mi_to_string() and osmo_bcd2str(), but still lack a function that
conveniently prints both MI type and value in one function call.
Related: http://people.osmocom.org/neels/mi_mi_mi.jpg
Change-Id: I7798c3ef983c2e333b2b9cbffef6f366f370bd81
Previously it could encode both incorrect values as well as incorrect
message. Let's fix this by explicitly checking for invalid values and
ensuring that at least one of the parameters is valid.
This function have no external or internal users so it's better to fix
type signature as well to match the rest of gsm0808_create_lcls_*().
Change-Id: I7b33a771acbd391c5f9a494d6450edb18511433f
Disable GnuTLS fallback if sufficient glibc version detected. Previously
GnuTLS fallback was used regardless of getrandom() availability in
glibc. Fix this by automatically disabling it when not needed. This does
not affect the ability to manually disable it unconditionally.
Change-Id: Ibe2117afc050261668a4d5a590044aabcd08aefe
* use macro for version check
* report glibc version upon random.h detection
* comment where various #endif belongs to
* explicitly check for embedded build (our target toolchain don't use
libc so there's no point in checking its version)
Change-Id: Ia54f0b7a861f955be65bb0cf06eb10af9372d062
In the MSC, we have RAN types GERAN_A and UTRAN_IU, now we need a similar enum
in osmo-hlr's GSUP client.
Naming: in the MAP specifications, the RAN type is mostly called RAT type,
(Radio Access Network vs. Radio Access Technology?). Since GSUP is more about
MAP messages, I'm calling the enum osmo_rat_type.
Rationale: osmo-msc and osmo-sgsn want to tell the osmo-hlr which RAT a
subscriber is calling on. A subsequent patch will extend the GSUP protocol and
add a RAT types IE.
Change-Id: I659687aef7a4d67ca372a39fef31dee07aed7631
In 3GPP TS 48.008 the Global Call Reference IE is only used in HANDOVER
REQUEST (§3.2.1.8) and ASSIGNMENT REQUEST (§3.2.1.1) messages which
also include LCLS Config and CSC parameters. Hence, there's no point in
using GCR encode/decode functions alone.
Introduce gsm0808_dec_lcls() and gsm0808_enc_lcls() as trivial wrappers
on top of GCR enc/dec routines which are made static. Adjust tests
accordingly. Test output intentionally left unchanged.
Change-Id: Icfbb2404e1a1d500243e2071173299b557369335
Implement necessary messages for Procedure Check_IMEI_VLR (TS 23.018
Chapter 7.1.2.9). This lets the VLR ask the EIR to check if an IMEI
is valid. In the Osmocom stack, we don't have an EIR and this request
will be handled by the HLR. We will be able to store the IMEI in the
HLR as side-effect (OS#2541).
This is roughly based on TS 29.002 8.7.1 MAP_CHECK_IMEI service, but
only implements the bare minimum required IEs (imei and imei_result).
Related: OS#3733
Change-Id: I085819df0ea7f3bfeb0cabebb5fd1942a23c6155
According to 3GPP TS 29.002, section 12.4, MAP-READY-FOR-SM is
used between the MSC and VLR as well as between the VLR and the
HLR to indicate that a subscriber has memory available for SMS.
This change replicates this service in GSUP as READY_FOR_SM_*.
The only mandatory IE for this service (excluding Invoke ID) is
'Alert Reason' that is replicated by OSMO_GSUP_SM_ALERT_RSN_IE.
Change-Id: Ic37f3b2114b8095cfce22977e67133b9103942e3
Related Change-Id: (docs) I549b6c8840a1e86caac09e77fb8bc5042d939e62
Related Change-Id: (TTCN) If2256607527ecfcb10285583332fb8b0515d7c78
Related: OS#3587
According to 3GPP TS 29.002, there are two services:
- MAP-MO-FORWARD-SHORT-MESSAGE (see 12.2),
- MAP-MT-FORWARD-SHORT-MESSAGE (see 12.9),
which are used to forward MO/MT short messages.
This change replicates both services as GSUP messages:
- OSMO_GSUP_MSGT_MO_FORWARD_SM_*,
- OSMO_GSUP_MSGT_MT_FORWARD_SM_*.
Please note, that only the 'must-have' IEs are introduced
by this change, in particular the following:
- OSMO_GSUP_SM_RP_MR_IE (see note below),
- OSMO_GSUP_SM_RP_DA_IE (see 7.6.8.1),
- OSMO_GSUP_SM_RP_OA_IE (see 7.6.8.2),
- OSMO_GSUP_SM_RP_UI_IE (see 7.6.8.4),
- OSMO_GSUP_SM_RP_MMS_IE (see 7.6.8.7),
- OSMO_GSUP_SM_RP_CAUSE_IE (see GSM TS 04.11, 8.2.5.4),
where both SM_RP_DA and SM_RP_OA IEs basically contain
a single nested TV of the following format:
- T: identity type (see 'osmo_gsup_sms_sm_rp_oda_t'),
- V: encoded identity itself (optional).
According to GSM TS 04.11, every single message on the SM-RL has
an unique message reference (see 8.2.3), that is used to link
an RP-ACK or RP-ERROR message to the associated (preceding)
RP-DATA or RP-SMMA message transfer attempt.
In case of TCAP/MAP, this message reference is being mapped to the
Invoke ID. But since GSUP has no 'Invoke ID' IE, and it is not
required for other applications (other than SMS), this change
introduces a special 'SM_RP_MR' IE that doesn't exist in MAP.
Change-Id: Ibe325c64ae2d6c626b232533bb4cbc65fc2b5d71
Related Change-Id: (docs) Ie0150756c33c1352bc4eb49421824542c711175c
Related Change-Id: (TTCN) Ibf49474a81235096c032ea21f217170f523bd94e
Related: OS#3587
* 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
Add functions to encode and decode Global Call Reference as per
3GPP TS 29.205 Table B 2.1.9.1 add corresponding tests.
Change-Id: Iee95aa4e5c056645b6cb5667e4a067097d52dfbf
Related: OS#2487
All successful cases already return from the switch(), so simply handle all
errors below it by returning an empty string (if there is enough string
buffer).
Change-Id: I709ac3b9efb7b4258d8660715b10312e11b9b571
For MI encoding, see 3GPP TS 24.008, 10.5.1.4 Mobile Identity. The 'odd' flag
indicates whether the last BCD nibble is used. Of course that flag should be
made sure to reflect the actual length.
Change-Id: Id6e695ebf9f86b295eaa7e2c6228989256f37e68
By using osmo_bcd2str(), ensure that the resulting string is always nul
terminated, and always return strlen()+1 whether truncated or not.
Still keep up the previous return value style, even if that isn't consistent at
all.
The difference between IMSI/IMEI and TMSI return values remains and is not part
of this patch.
Change-Id: I1b51b72a721e1cc9d69796b804ebda741ff0f36b
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
We already have some GSM29118 related definitions and functions in
libosmocore. Lets also add some functions to generate GSM29118 messages
(similar to those we have for GSM0808).
Change-Id: Ic87f8a771b87b52215d0a7451b67794557b80b8a
Related: OS#3615
We currently have no generator function that can generate BSSMAP
HANDOVER PERFORMED messages. Lets add function for this.
Change-Id: I825106858bd89afc9837811b8fed2e8accc82441
Related: OS#3645
* add spec reference
* remove LCLS note: CI parameter is optional but have nothing to do with
LCLS
It's pretty hard to decipher from the spec what CI is useful for and we
have not used it anyway so let's just keep it as "Optional" for now.
Change-Id: I5552732afcec48047d993ae6ffb73a3e5d7c9202
ARFCNs are values in well defined ranges. Until this patch, ARFCNs not
belonging to any band were blindly assigned to DCS1800 by
gsm_arfcn2band, causing unnoticed bugs and misconfigurations in
osmo-bsc.
Previous API gsm_arfcn2band cannot accomodate this kind of check easily,
so let's deprecate it to tell people to use a new API gsm_arfcn2band_rc
which performs this kind of checks and allows callers to log failures,
misconfigurations, etc.
At the same time, modify implementation of gsm_arfcn2band to abort if an
invalid ARFCN is passed, this way users of this API can notice they are
passing wrong data to it that most probably will produce unexpected
results.
Related: OS#3063
Change-Id: I780d452dcebce385469e32ef2fd844df6033393a
* 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
The msgb_wrap_with_TL() is generally useful so it make sense to make it
public to facilitate code re-use.
Other helpers can be implemented as trivial wrappers over existing tlv.h
functions. Update headers and code accordingly.
Change-Id: I37e91d031fba28cf1c6735b8069b0265746f55e6
Add values indicating that LCLS control/config/status value has not been
received yet.
Change-Id: I52dc6a52f5ee043ed2c1625ffecfd495e3c746b1
Related: OS#2487
* add Class definitions
* add helper to check for extended bit
* add helper to get Cause's Class
* use enum in gsm0808_cause_name() and gsm0808_create_cipher_reject() to
avoid confusion between class and cause
* update gsm0808_create_cipher_reject() comments
Change-Id: I31b31dfc22eb4b6b07089e1255246ac458125340
Related: OS#3187
The value strings for the SGSAP IEI are missing, lets add a set of value
strings and a function to retrieve them.
Change-Id: I2787303174f74ffba86675bce2c12f680d8ea708
Related: OS#3615
The API documentation lacks the the description for the last parameter,
lets add a description for it.
Change-Id: Ibcd25d3a7ddd7075eb15daff6dba42236d14d945
* add note about (yet) unsupported standard feature
* use enum constant instead of hex value
Change-Id: I5cc5fc1ae8d5474dbc8d3385a493adf6420a3c98
Related: OS#3187
The function that generates the clear command takes a parameter
"reason", which is the cause code. Lets give it the name "cause" to have
a coherent naming scheme that matches the other functions and the 3gpp
specs.
Change-Id: I7b6c15e8fa8db13deef5041095944ca1c58fb99f
The api documentation names a parametery by a different name than it is
listed in the parameter list of the function. Lets make the apidoc
coherent.
Change-Id: Id21ed1e920fb64522a734f206efbe2871ec05b06
Missing (unset) type of to be encoded message is not a memory
allocation failure (-ENOMEM), this is definitely a mistake.
Change-Id: Ibbac18e2b68b765c17c2bc959c4c085037953a7f
3GPP_TS_48.008, 3.2.2.103 Speech Codec List states the following:
"The length indicator (octet 2) is a binary number indicating the
absolute length of the contents after the length indicator.
The length depends on the number and type of Speech Codec Elements
to be included. The minimum length of one Speech Codec Element is 1
octet and the maximum length is 3 octets. The maximum number of
Speech Codec Elements within the Speech Codec List is not defined."
This clearly refers only to the length of a single speech codec
element but not on the overall list. So speech codec lists with
length 0 are indeed permitted by the spec.
- Remove the assertion that checks on zero length speech codec
lists.
Change-Id: I1eb1f4466b98bdd26d765b0e4cc690b5e89e9dd6
Related: OS#3657
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
parameter cfg in gsm0808_sc_cfg_from_gsm48_mr_cfg() is used read only.
Lets add a const to make this clear to the compiler.
Change-Id: I31e8d273b070b0afc446a298299d4f502d6c396b
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
Stefan Sperling
Oliver Smith
Philipp Maier
Pau Espin
Harald Welte
Neels Hofmeyr
