Commit Graph

27 Commits

Author SHA1 Message Date
Harald Welte 2b7b1bbbdc gbproxy: Rename gbproxy_cfg.nses to gbproxy_cfg.bss_nses
We will soon also have a list of sgsn-side NSEs, and we need to
differentiate those.

Change-Id: If5accec0c70c01b88927ea07beba6f6488bd9d5a
Related: OS#4472
2020-12-05 12:08:10 +01:00
Harald Welte 560bdb37cc gb_proxy: Rename gbproxy_peer to gbproxy_bvc
I cannot really read the code while it contains its historical weird
naming.  A "peer" used to be a strange amalgamation of NSE + BVC,
while in reality we can have any number of BVC on top of each NSE.

We recently started to split the peer into a gbproxy_nse_peer + gbproxy_peer.
This takes it one step further and renames gbproxy_peer to gbproxy_bvc,
as that's really what it is.

Change-Id: Iae01067282a6401f6af4cab731202872d2cdb080
2020-12-05 12:06:42 +01:00
Harald Welte 173a182d03 gb_proxy: Use TLVP_PRES_LEN instead of TLVP_PRESENT
With TLVP_PRESENT we only check if a tiven TLV/IE is present,
but don't verify that it's length matches our expectation.  This can
lead to out-of-bounds reads, so let's always use TLVP_PRES_LEN.

Change-Id: I1519cff0f6b2fe77f9a91eee17e0055d9df1bce6
2020-12-05 11:44:39 +01:00
Harald Welte f9e149b058 gbproxy: Send BVC-STATUS if BSS sends us BVC-RESET without mandatory IEs
Change-Id: I198ca70f5e0947735f76d32cd9d3eed159349a94
2020-12-05 11:44:38 +01:00
Daniel Willmann 4becbcbe18 gbproxy: Add newline to log message
Change-Id: I91a076872b5d744a237f6d325857b95362455e8d
2020-12-04 01:31:05 +01:00
Daniel Willmann 8f407b12a6 gbproxy: Add BVC log filters
Since gbproxy doesn't use bssgp_rcvmsg from libosmocore we need to
implement our own filtering.

Change-Id: I4d1b57b89990945d307f27a58a7f630be0253d5b
Related: SYS#5232
2020-12-04 01:31:05 +01:00
Harald Welte 324f065fa9 gbproxy: Cosmetics: use longer lines
Change-Id: I9426bf4be2faa0da7848cb102b20cc539948b3f5
2020-12-02 23:06:37 +01:00
Harald Welte 314647b0be gb_proxy: Slightly restructure processing of BSS-originated BVC-RESET
* explicit else clause rather than implicit
* don't continue processing if mandatory BVCI missing from message

Change-Id: I038576b91ae1ece149149d8663de7b8495d24e06
2020-12-02 23:03:22 +01:00
Harald Welte 7df1e5a757 gbproxy: Move BSS-side BVC-RESET processing to its own function
The switch clause was getting a bit too long/nested, let's add
a separate gbprox_rx_bvc_reset_from_bss() function.

Change-Id: If262566e275cca96035045d1194ce102c0942eb6
2020-12-02 23:01:47 +01:00
Harald Welte 7479c4da94 gb_proxy: Broadcast SGSN-INVOKE-TRACE and OVERLOAD
Both BSSGP messages appear from the SGSN in downlink on BVCI=0.

We must send a copy of this message to each of the BSS side NSEs.

Change-Id: Ia19791b143989eb1490f461d88b9edbd8e3b82be
Closes: OS#4875
2020-12-02 22:45:42 +01:00
Daniel Willmann 65bfbaf40d gbproxy: Add todos encountered while going through the code
Change-Id: I8c3a788f008d3cb2d067d974c2b1b9ca45185d8d
2020-12-02 22:42:48 +01:00
Daniel Willmann 3696dce679 gbproxy: Change generic LOG messages so BVCI/NSEI fmt is consistent
We actually need to alter our compiler flags to avoid -Werror=trigraphs
creating trouble:

gb_proxy.c: In function ‘block_unblock_peer’:
gb_proxy.c:875:37: error: trigraph ??) ignored, use -trigraphs to enable [-Werror=trigraphs]
  875 |   LOGP(DGPRS, LOGL_ERROR, "BVC(%05u/??) Cannot find BSS\n",
      |

Fixes: SYS#5233
Change-Id: I93296353dd964602699480faae1248096e331c6a
2020-12-02 22:42:42 +01:00
Daniel Willmann 5e595cadf7 gbproxy: Use LOG macros for NSE/BVC
Change-Id: If445f18bc8390c338b5aeb9085951ea392e68b3a
Related: SYS#5233
2020-12-02 17:47:49 +01:00
Harald Welte 95cf9fbfa4 gb_proxy: More precise + readable log messages
* use string representations instead of magic numbers whenever possible
* make text actually describe the specific case, rather than copy+paste
* proper order (foobar indication) not (indication ..... foobar)

Change-Id: I232038da26a9963763c5fc9051b87c9182b27d94
2020-12-01 11:56:57 +00:00
Daniel Willmann 559edac17a gbproxy: Separate function to move gbproxy_peer to different nse
Change-Id: I0a8b1e4b78384ea99d50109f050ca501b18ba5d9
Related: SYS#5226
2020-11-30 18:30:35 +01:00
Daniel Willmann 76205715c1 gbproxy: Only send paging to each matching NSE once
Fixes: SYS#5226
Change-Id: Ia33e7816b354266b9d2659ef96b798db60c134f3
2020-11-30 18:30:35 +01:00
Daniel Willmann af7398acff gbproxy: Ensure BVC0 is reset before handling PtP BVCs
Change-Id: I9c67f973f7bca00e8eb22a024ef2282c007dd84b
Related: SYS#5226
2020-11-30 18:30:35 +01:00
Daniel Willmann e50550e409 gbproxy: Add NSE peer that can have multiple gbproxy_peers
We want this level of indirection to support multiple BVCs per NSE. The
current code assumes that an NSE only has one BVC which breaks messages
on the signalling BVC which should only be sent once to an NSE
regardless of the number of BVCs it contains.

Change-Id: I97cc6c8f8c0f1b91577ab8f679c4ae217cc88076
Related: SYS#5226
2020-11-30 18:30:35 +01:00
Harald Welte fe05958610 gbproxy: Pass TLLI as LSP towards NS to facilitate load sharing
Change-Id: I6aef26c126b330a393fc2be5f558b6d5f1d9f7f4
2020-11-27 23:15:18 +01:00
Harald Welte 53ee20604c gbproxy: Implement paging to entire BSS area
When we receive a PAGING for PS or CS with destination to the entire
BSS area, we need to iterate over all peers and send one copy of the
paging to each of them.

Change-Id: Iecf244238500a354d5a5b40c76f0c0bb8f8c2511
2020-11-24 11:33:16 +01:00
Harald Welte 3d1bd4d04d gbproxy: Properly implement paging to LAC/RAC
There may very well be many PCUs connected within the same RAC or LAC.

This means we'll need to iterate the list of peers and dispatch it to
each matching peer.

Change-Id: I2c44959661fb53730586f4347cbfbbcece065e13
2020-11-24 11:33:12 +01:00
Daniel Willmann b655010d95 osmo-gbproxy: Free msgb in ns2 prim callback
Commit cce88282388f in libosmocore changed the msg ownership model - the
callback that the user registers is now responsible for freeing the msg.

Change-Id: Iee940aba7d94afefb5957dbe5f0b04dcf951b31c
Related: SYS#4998
2020-11-09 10:54:09 +00:00
Daniel Willmann 3bdfa43bff gbproxy: Get the peer if paging by BVCI on SIG_BVC
Currently the code reports routing the message to a BVCI but never even
tries to get the peer for it.

Change-Id: Ic72f0f03e5886ab76404915fc60a2796e6881a7a
Related: SYS#4998
2020-11-06 22:21:21 +01:00
Daniel Willmann 8489e7a1a9 gbproxy: Add todo for BVC RESET logic
When we receive a signalling BVC RESET from the SGSN we want to reset
the signalling BVCs for every peer.

Change-Id: I98c1a53d0e4b9a988e9ddec97ce0c67ded6f6326
Related: SYS#4998
2020-11-06 22:21:16 +01:00
Daniel Willmann 35f7d33c41 gbproxy: Whitespace fixes
Change-Id: Id70c15050b6314fdcd452e89e358d657e1f86e57
2020-11-06 18:45:05 +01:00
Alexander Couzens 951e133d17 Port gbproxy to NS2
Since NS2 has a different abstraction we mock up the prim send/recv
functions and don't test NS like the old tests did.

Related: SYS#4998
Change-Id: Iecfd0408a35a11638d254c1db3c1d477b1a11524
2020-11-06 18:45:05 +01:00
Pau Espin 1ddefb12e4 Move out gbproxy to its own subdir
Change-Id: I2cc98d3a276d953609bbbbaa9782a0112687791e
2019-09-02 14:03:04 +02:00