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This adds a set of function that parse a single tlv, lv, tv, or v
encoded information element. They are complementary to the *_put
functions defined in libosmocore's tlv.h file. The functions update
the data and data_len fields unless they are a 'match' function and
the tag field doesn't match.
Sponsored-by: On-Waves ehf
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Add TLLI cache output to gbprox_dump_peers() to include this info
into the test output.
Separate RA Update Req message handling from Attach Request handling.
Note: There is no test case for the P-TMSI Reallocation Command yet.
Sponsored-by: On-Waves ehf
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This patch adds IMSI/TLLI connection tracking and uses it to control
APN patching based on the IMSI. TLLI entries can expire based on age
and/or by limiting the TLLI list size.
VTY config-gbproxy:
no core-access-point-name disable APN patching
core-access-point-name none remove APN if present
core-access-point-name APN replace APN if present
core-access-point-name none match-imsi RE remove if IMSI matches
core-access-point-name APN match-imsi RE replace if IMSI matches
tlli-list max-age SECONDS expire after SECONDS
no tlli-list max-age don't expire by age
tlli-list max-length N keep N entries only
no tlli-list max-length don't limit list length
RE is an extended regular expression, e.g. ^12345|^23456
Ticket: OW#1192
Sponsored-by: On-Waves ehf
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Currently, all patching state is stored globally in the gbproxy. Thus
the feature cannot be used safely with a concentrating gbproxy (NAT).
This patch moves the state and relevant counters to the gbprox_peer
structure. It adds code to resolve the corresponding peer when
packets are received by looking at BVCI, NSEI, and BSSGP IEs (BVCI,
RAI/LAI/LAC) when the peer is not passed to the
gbprox_patch_bssgp_message() function.
Test cases are also added for the SGSN->BSS case including test cases
with invalid identifiers.
Note that this patch should make it possible to use RAI patching at a
NAT gbproxy as long as the messages are not encrypted.
Ticket: OW#1185
Sponsored-by: On-Waves ehf
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This patch adds a Detach Request (MO) / Detach Accept sequence to the
test, followed by another (here invalid) Act PDP Context Req which
should be APN patched.
Sponsored-by: On-Waves ehf
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Add a DTAP GMM Information message with an IMSI in the BSSGP header
to enable the association between IMSI and TLLI.
The TLLI of the Routing Area Update messages is set to foreign.
Sponsored-by: On-Waves ehf
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Patch the APN in every 'Activate PDP Context Request' message to the
value given by the 'core-access-point-name' command. If the command is
given without an APN, the whole APN IE will be removed. If the
command is being prefixed by a 'no', the APN IE remains unmodified.
The patch mode 'llc-gsm' is added to selectively enable the patching
of LLC session management messages. This is enabled implicitely by
the patch mode 'llc'.
Note that the patch mode should not be set to a value not enabling
the patching of LLC GSM messages ('llc-gsm', 'llc', and 'default' are
sufficient to patch 'Activate PDP Context Request' messages).
Ticket: OW#1192
Sponsored-by: On-Waves ehf
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This adds a feature to patch the BSSGP MNC/MCC fields of messages going
to and coming from the SGSN. To enable this feature, the gbproxy's
VTY commands 'core-mobile-country-code' and/or
'core-mobile-network-code' must be used. All packets to the SGSN are
patched to match the configured values. Packets received from the
SGSN are patched to the corresponding values as last seen from the BSS
side.
Note that this will probably not work with a gbproxy used for several
BSS simultaneously.
Note also, that MCC/MNC contained in a LLC IE will not be patched.
Ticket: OW#1185
Sponsored-by: On-Waves ehf
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This patch makes a few changes to improve readability:
- change the sendto() hexdump to start with NS instead of BSSGP
- use more specific message descriptions instead of 'UNITDATA'
- add a title line per test
Sponsored-by: On-Waves ehf
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Enable the generation of more log messages.
Sponsored-by: On-Waves ehf
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An empty log_info is not enough. We need to make sure that at least
DLGLOBAL is present. Instead of doing that make sure that we have
enough entries.
==26163== Conditional jump or move depends on uninitialised value(s)
==26163== at 0x403B289: osmo_vlogp (logging.c:290)
==26163== by 0x403B3DA: logp2 (logging.c:339)
==26163== by 0x804D027: gbprox_relay2bvci (gb_proxy.c:347)
==26163== by 0x804D3CF: gbprox_rx_sig_from_sgsn (gb_proxy.c:589)
==26163== by 0x804DBFC: gbprox_rcvmsg (gb_proxy.c:685)
==26163== by 0x4052CB0: gprs_ns_process_msg (gprs_ns.c:669)
==26163== by 0x4052F70: gprs_ns_rcvmsg (gprs_ns.c:1053)
==26163== by 0x804BB49: gprs_process_message (gbproxy_test.c:488)
==26163== by 0x804BC4C: send_ns_unitdata (gbproxy_test.c:210)
==26163== by 0x804BDE8: send_bssgp_reset_ack (gbproxy_test.c:243)
==26163== by 0x804B54F: main (gbproxy_test.c:863)
==26163==
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The peers are (talloc) children of the GPRS NS. This means the
peers (and the rate counters) are currently being deleted twice.
==23446== Invalid write of size 4
==23446== at 0x403C243: rate_ctr_group_alloc (linuxlist.h:66)
==23446== by 0x4050974: gprs_nsvc_create (gprs_ns.c:209)
==23446== by 0x405320D: gprs_ns_instantiate (gprs_ns.c:1330)
==23446== by 0x804ABEB: main (gbproxy_test.c:666)
==23446== Address 0x4300694 is 52 bytes inside a block of size 784 free'd
==23446== at 0x4029DA8: free (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
==23446== by 0x4041B9D: _talloc_free (talloc.c:609)
==23446== by 0x4043292: talloc_free (talloc.c:578)
==23446== by 0x40532D3: gprs_ns_destroy (gprs_ns.c:1363)
==23446== by 0x804ABD7: main (gbproxy_test.c:660)
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This adds a test case with several messages to test BSSGP patching.
New messages:
- BSSGP/DTAP Attach Request
- BSSGP/DTAP Attach Accept
- BSSGP/DTAP Routing Area Update Request
- BSSGP/DTAP Routing Area Update Accept
- BSSGP/DTAP Activate PDP Context Request
- BSSGP SUSPEND
- BSSGP SUSPEND ACK
Sponsored-by: On-Waves ehf
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This function abstracts identical code sequences that are used at
multiple places.
Sponsored-by: On-Waves ehf
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This parameter is not used (the methods are always called with an
argument of 1 in the third position). Thus the parameter is removed
completely.
Sponsored-by: On-Waves ehf
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The code currently uses an encoded sequence of (hex) 10 20 30 40 50
60 as RAI, for which no bijective mapping to the set of
representations MCC-MNC-LAC-RAC exists.
This patch changes the hard-coded RAI to 11 22 33 40 50 60 which maps
to 112-332-16464-96 (and vice-versa).
Sponsored-by: On-Waves ehf
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This checks the behavior of the gbproxy when the BSS peer changes the
NSEI and the NSVCI. It also tests BVC_RESET and other UNITDATA
messages after these changes between BSS and SGSN and vice versa (via
the gbproxy).
Ticket: OW#874
Sponsored-by: On-Waves ehf
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This adds a test with a UNITDATA SGSN message that is addressed to an
invalid (unknown) BVCI. The test shows, that the message is echoed to
the SGSN.
Sponsored-by: On-Waves ehf
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This adds counters that are incremented when errors are detected.
It also modifies the VTY command 'show gbproxy' so that
'show gbproxy stats' shows the counters.
Sponsored-by: On-Waves ehf
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This adds a simulation of the SGSN side of the Gbproxy. The VC is set
up correctly and several combinations of BSSGP messages are sent.
Sponsored-by: On-Waves ehf
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Currently in most places in gb_proxy.c a reference to a NS-VC object
is used where the peer is meant instead. The patch changes this by
using the NSEI instead in these cases.
Sponsored-by: On-Waves ehf
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This program tests the gbproxy implementation by passing NS messages
to a modified gbproxy that dumps the resulting messages, signals, and
state.
It focusses on testing abnormal situations like port changes.
Ticket: OW#874
Sponsored-by: On-Waves ehf
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