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2019-09-02Introduce FSM mm_state_iu_fsmPau Espin Pedrol10-65/+165
Implement TS 23.060 6.1.2 Mobility Management States (Iu mode) using osmocom FSM and drop old implementation. Most of the logic on each state is still kept in gprs_gmm.c, will be inserted into the FSM later. Change-Id: I4c9cf8c27194817c56e8949af0205e1cc14af317
2019-09-02Introduce FSM mm_state_gb_fsmPau Espin Pedrol10-125/+154
Implement TS 23.060 6.1.1 Mobility Management States (A/Gb mode) using osmocom FSM and drop old implementation. Most of the logic on each state is still kept in gprs_gmm.c, will be inserted into the FSM later. Change-Id: I04004423e993107374d5a3549b8a93ac169251dd
2019-09-02sgsn_vty: Print correct Iu mmctx id in 'show mm-context'Pau Espin Pedrol1-1/+14
Change-Id: I79333bef4a4bf743fcad07812c9a213b368ff2b6
2019-09-02sgsn_vty: Fix mmctx rate_ctr output indentationPau Espin Pedrol1-1/+1
Change-Id: I1b89c179e1ba08b65e31727fdce90c7b578f4d6d
2019-09-02sgsn_cdr.c: Fix ip addr string buffer sizePau Espin Pedrol1-3/+3
INET(6)_ADDRSTRLEN already contains the required extra null byte at the end, no need to add +1 to it. Change-Id: I5a16659e007c6883fe21582cce5dac544e6d4bb9
2019-09-02gprs_gmm.c: Replace inet_ntoa with inet_ntopPau Espin Pedrol1-3/+8
inet_ntop manual states: "inet_ntoa(3) is now considered to be deprecated in favor of inet_ntop()". Change-Id: I0c708d047122f349acf46797a9e5973040e7ae04
2019-09-02Merge common allocation steps for Gb and Iu ctxPau Espin Pedrol1-30/+27
This way it's easier to add new common functionalitites without forgetting to add it on both sides, and simplifies the code. Change-Id: Ib6c0427ac7b35295cf1caf2f28cb2a5c155b9d9c
2019-09-02Split enum gprs_pmm_state into Iu and Gb counterpartsPau Espin Pedrol6-36/+43
Those two state sets are not part of the same state machine, and are used in different scenarios, so let's split them and handle them in Gb and Iu specific parts of struct sgsn_mm_ctx. This is required in order to improve related code (for instance, use osmocom fsm). Change-Id: I6100d607da316da0595886c6968704dd9ccfbde9
2019-09-02Move llc->MM/SM Gb specific glue code to its own filePau Espin Pedrol7-62/+110
Now that we have RANAP/Iu handling specificities in its own file, let's have also Gb specific glue code for messages coming from llc up to MM/SM layer in its own file. This way same entry points in gprs_gmm.c are used by Gb and Iu: gsm0408_rcv_gmm() (for MM) and gsm0408_rcv_gsm() (for SM). Change-Id: Iaf57922a0970c1d03f6f1d6337d27ae3d4aaf32c
2019-09-02Move lots of Iu/ranap specific code into its own filePau Espin Pedrol11-238/+274
RANAP related functionalities were splitted among several files (gprs_gmm.c, gprs_sgsn.c and sgsn_libgtp.c). Let's move it into its own file to shrink complexity/size of existing files. It also allows to keep a lot of conditionally enabled code (BUILD_IU) and its dependencies (osmo-iuh) together. Change-Id: I549042aaff045a378de77d657cc396ee08f22f33
2019-09-02sgsn: gtp: Drop related pdp contexts on echo timeout against GGSNPau Espin Pedrol3-7/+16
Change-Id: I7e97bac1c13a2c26203eb64e590fd75d77eb44bd
2019-09-02Introduce log helper LOGGGSN and log category DGTPPau Espin Pedrol3-1/+13
It will be used in forthcoming commits. Change-Id: I30f46f44af1d0eee324b1a995c1dad2e1315af7c
2019-09-02gprs_gmm: gsm48_rx_gmm_att_req(): refactor duplicated codeAlexander Couzens1-10/+6
Change-Id: I709f847802a975e1a75d0b87ac5125240cfd0854
2019-09-02gprs_gmm: clarify comment of Iu follow-on requestAlexander Couzens1-2/+10
Change-Id: Ib6b3a1b250de373656310a3c8f88d1d39bdcee60
2019-09-02gprs_gmm: only update gb/iu cell information when Iu/Gb presentAlexander Couzens1-9/+15
This function should not do the transistion of Iu/Gb. Only copy simple data Change-Id: Id52761f3ea655a2d0cc663a950154c6b7c1b5f7a
2019-08-30gtp: cb_delete_context(): Clarify why pdp->lib is set to NULLPau Espin Pedrol1-2/+3
Change-Id: I02c46062d6dc9802d9cae057587e66a68a65436c
2019-08-28gtp: make echo_interval unsignedPau Espin Pedrol3-6/+5
There's no real need to use -1 to indicate echo timer as disabled, since 0 can also be used (it doesn't make sense to have a timer timeout of 0). This way code is simplified. Change-Id: I689034887188a53590eddeffda781629694eb5ed
2019-08-21gprs_gmm.c: Add spec document to function documentationPau Espin Pedrol1-16/+16
Change-Id: Ibb89499e9c1ab588336df34fde26faf3fbf2c72c
2019-08-21gprs_gmm.c: Print value_string of reject causePau Espin Pedrol1-1/+2
Change-Id: I71d9abcf7e3a836c475b7adbb95a82580e41ae6d
2019-08-21vty: Introduce cs7-instance-iuPau Espin Pedrol5-1/+25
Similar to what we already have in osmo-msc. Change-Id: Iaa9e1d06dd0430848ef4f7498a3c15d13f899904
2019-08-21examples: Add osmo-sgsn_custom-sccp.cfgPau Espin Pedrol1-0/+38
Change-Id: Id3a3ccbf168fbbc28153cbf7f0249294eee34d3d
2019-08-20gprs_gmm.c: Use osmo_rai_name() in log linePau Espin Pedrol1-3/+2
Change-Id: Ieab9b7696c93de9a5d3d42f614072a6f2181e37d
2019-08-20gprs/gprs_gmm: implement T3314. Timeout to reset MM state READY->STANDBYAlexander Couzens5-2/+98
When a MS MM state is READY its exact location is known (PCU). On Gb, T3314 (aka TS 23.060 "READY timer") sets the MM state from READY to STANDBY, where only the RA is known. Introduce a second set of timer variables, because state timer can run while another packet state timer is timing out. Related: OS#1941 Change-Id: I4ce23ebe50d141076c20c9c56990b7103cd25e55
2019-08-20tests: Introduce vty-transcript-test testsPau Espin Pedrol2-4/+88
Add a few commands to make sure it's working fine, and print all available timers with default values. Change-Id: Ifd092b9561d49be1f62769d95ba49f6e4aeb4066
2019-08-20Replace own timer infra with libosmocore osmo_tdefPau Espin Pedrol5-125/+131
VTY command "show timer" is also available now. Change-Id: Ia0cf5f0a49737fbc419e2ccc86312d01c6e0056e
2019-08-20tests: Verify that timers can be set over VTYPau Espin Pedrol1-0/+9
Change-Id: I486fc2a56e235a539836894d2042c1ca6e514ab9
2019-08-20gprs_gmm: Avoid spaces in fsm events and enum stringsPau Espin Pedrol2-17/+17
FSM doesn't expect receiving event names containing spaces (log lines generated are confusing). Similar for enums, it's better using code names to match easily and make log lines more clear. Change-Id: I16ede8bf8352b09bc772fd7b43fad2c2274b3ec1
2019-08-20Introduce and use log macros when no mm ctx availablePau Espin Pedrol4-14/+46
Change-Id: Iba22060d8646bc8ec6227684ccb91d98cb4c7be2
2019-08-20gprs_gmm.c: Call mmctx_set_(p)mm_state only on related ran_typePau Espin Pedrol1-14/+27
For new readers it's very confusing why PMM states and MM states are in the same enum, but handled with different functions, and sometimes called one right after the other with different enums. Calling them when on a different ran_type makes the function early return, so let's better conditionally call the function to make it clear in the flow when the function is expected to do something. Change-Id: I65ad9e180177bc9fc7c4a037cd85cfe33b161f73
2019-08-19gprs_gmm.c: Fix typo in log messagePau Espin Pedrol1-1/+1
Change-Id: I357f0af89f5d14d304c3e889a49a5f6c23b7fb7a
2019-08-19sgsn: use sccp_simple_client API to setup ss7 id 0 instead of 1Pau Espin Pedrol1-5/+5
Implementation of osmo_sccp_simple_client() API internally uses ss7 id 1, which is confusing since there's no 0 in use in osmo-sgsn. Let's explicitly use the 0 one so it is configured by "cs7 instance 0" in the VTY. Related: OS#4157 Change-Id: I0e23a6a76ebcba0b1b424e3d3b20d06c1da44cbe
2019-08-15gprs_gmm.c: Flag mmctx_set_(p)mm_state() functions staticPau Espin Pedrol1-2/+2
Change-Id: I061144b6994ee40d5b32eb321dd4f3d3786d028d
2019-08-15gprs_sgsn.h: Flag MM_CTX_T_GERAN_Iu as not supportedPau Espin Pedrol2-1/+5
Change-Id: I3b53a530ab25434e2b2f4d80ad70a8a5f22bfcac
2019-08-15gprs_gmm.c: Use correct function to set MM_IDLE state during cleanupPau Espin Pedrol1-1/+1
Change-Id: Ic6912269d0d69c86f19e57f3271ebda1328e968f
2019-08-15gprs_gmm: Introduce assert to guard against unexpected conditionPau Espin Pedrol1-0/+5
This may well be the culprit of OS#3957, were already freed llme is accessed from mmctx context later on, upon some timer is triggered in mmctx. Related: OS#3957 Change-Id: I8e1eaeb9b3ebee8e45704b4fe007190c7db609e4
2019-08-13gprs_sgsn.c: Remove recently introduced assertPau Espin Pedrol1-2/+0
Recent commit added an assert to make sure unexpected conditions were happening in sgsn_mm_ctx_cleanup_free(). Old code was passing mm->gb.tlli to gprs_llgmm_assign with "new tlli" being all-1's (aka unassign mm->gb.tlli). The commit changed the code to use gprs_llgmm_unassign, which uses llme->tlli instead of mm->gb.tlli, and the assert was used to make sure no behavior change occured with the commit. It seems TTCN3 test TC_attach_auth_id_timeout triggers that assert, and after closer debug it seems mm->gb.tlli == llme->old_tlli, which makes sense since there's a mm->gb.tlli_new which is expected to be llme->tlli. When TLLI changes in GMM (Attach Request or RA Update), it is stored into mm->gb.tlli_new and assigned on the LLC layer using gprs_llgm_assign(), and upon completion signalling from MS, (after handling response to initial request) it is assigned to mm->gb.tlli (and value kept in mm->gb.tlli_new). So mm->gb.tlli and mm->gb.tlli_new usually contain the same value unless a new TLLI is allocated, and during the span of Request->Response->Complete it is kept different, the LLC layer having assigned the value of mm->gb.tlli_new. So, old code (before the commit adding the assert) was wrongly using mm->gb.tlli instead of mm->gb.tlli_new at the moment of unassigning (but not really problematic in practice since behavior is the same as long as "old TLLI" value is not all-1's. So we are fine and correct using gprs_llgm_unassign() (which passes llme->tlli as "old TLLI") instead of what used to be done before. In any case, the expected behavior is to free the llme object and get rid of everything... Fixes: 788863cda53298c24110d0fe0f8cd3309cdec747 Change-Id: I482acdbdf05ce0cb0a5804206672512854067f5b
2019-08-13gprs_gmm: Clarify comment during TLLI assignmentPau Espin Pedrol1-1/+1
TS 04.64 sec 7.2.1.1 LLGMM-ASSIGN specifies: """ If TLLI Old all 1's and TLLI New all 1's then TLLI Old and TLLI New are assigned, and TLLI New shall be used when (re-)transmitting LLC frames. Both TLLI Old and TLLI New shall be accepted when received from the peer. It shall be treated as a TLLI change according to subclause 8.3.2. """ Change-Id: I3a17715bf2dba7b03c1335ad106307eb4d5f564a
2019-08-12gprs_sgsn.c: Warn upon llme free unexpected scenariosPau Espin Pedrol1-1/+3
May be useful to detect unexpected conditions which could end up in memory leaks. Related: OS#3957 Change-Id: I0d175501083ce458ff1c07ad38761d2cbf4ea470
2019-08-12Introduce define TLLI_UNASSIGNEDPau Espin Pedrol4-15/+18
Change-Id: Ib8be5af2a5e92a7403505b73ce4c1751832de40d
2019-08-12gprs_gmm.c: Drop unneeded bracketsPau Espin Pedrol1-4/+2
Change-Id: Ie8ba2b9da695de8730834abb591df64295bb6172
2019-08-12gprs_gmm.c: Improve doc on nullable parametersPau Espin Pedrol1-2/+1
Change-Id: Iefb9b6dc34d87b4088c7535ef0a246103fe3f7e9
2019-08-12gprs_llc.h: Improve documentation of some structsPau Espin Pedrol1-2/+3
Change-Id: I1b45f45addc87c74f3ae109e544143a1335180de
2019-08-12gprs_gmm: Introduce macros to access msgb's associated IU UE ctxPau Espin Pedrol1-22/+20
Change-Id: I4d1d47af332d4557e8a3a70c1055bcc172166016
2019-08-08Bump version: 1.4.1 → 1.5.01.5.0Pau Espin Pedrol1-0/+66
Change-Id: Ife43559f395b9602f0b131a672f8d87d6ee48ea2
2019-08-08Require newer versions of dependenciesPau Espin Pedrol2-17/+17
New APIs only available since libgtp 1.4.0 are needed, and in turn that libgtp version requires newer libosmocore 1.1.0. osmo-sgsn itself requires libosmocore 1.2.0 since it uses GSM23003_TMSI_SGSN_MASK. Change-Id: I1c67d3e7dda093b4869756c7a63dc7a4549084ae
2019-08-05Remove undefined param passed to {logging,osmo_stats}_vty_add_cmdsPau Espin Pedrol3-5/+5
Since March 15th 2017, libosmocore API logging_vty_add_cmds() had its parameter removed (c65c5b4ea075ef6cef11fff9442ae0b15c1d6af7). However, definition in C file doesn't contain "(void)", which means number of parameters is undefined and thus compiler doesn't complain. Let's remove parameters from all callers before enforcing "(void)" on it. API osmo_stats_vty_add_cmds never had a param list but has seem problem (no "void"), so some users decided to pass a parameter to it. Change-Id: Ic4af704958819e6f65ac01be33ef5b3d69628ad0 Related: OS#4138
2019-07-30configuration.adoc: Add a section about encryptionDaniel Willmann1-0/+18
Change-Id: I3a2b84d386f55447e9eed35e59fdc0272e5147d1 Related: OS#1720
2019-07-30configuration.adoc: Small fixesDaniel Willmann1-14/+25
Fix some typos, correct data compression command, add example to turn off compression. Change-Id: I6beff8c66eacf12f1081d51dd6b124bdd4478558 Related: OS#1720
2019-07-29osmo-gbproxy.cfg: fix conflict with osmo-sgsn.cfgOliver Smith1-0/+1
Listen on 127.0.0.100 by default, so there is no conflict on 127.0.0.1:23000. This allows starting both services with their default configuration, like we are doing it in the Osmocom-Debian-install-* jenkins jobs. Related: OS#3369 Change-Id: I6e3053de8885a7954296d820c6a069d06276e4df
2019-07-26osmo-sgsn: Fix outdated information in usermanualDaniel Willmann2-18/+9
Quite a few features that are listed as not-implemented in the overview section are actually implemented now. Change-Id: I8d499a25293b69babc2aebb2d697438f8ba8141f Related: OS#1720
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