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http://cgit.osmocom.org/openbsc/commit/?id=88d06caa712a3fd40960c0d11d45373dc9341659
commit 88d06caa712a3fd40960c0d11d45373dc9341659
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Thu Nov 26 03:33:29 2015 +0100
gtphub: track tunnels explicitly.
So far, gtphub worked perfectly by only tracking single TEIs ... for probably
most uses. But a Ctrl plane tunnel may have expired despite a still active
corresponding User plane tunnel. The User plane would continue to work
indefinitely, but if any Ctrl messages followed after more than six hours of
Ctrl silence, they would have been dropped due to an expired TEI mapping.
We want to
- combine expiry of a user TEI with its ctrl TEI. (done in this patch)
- upon delete PDP context, remove both user and ctrl TEI mappings. (future)
- when a peer indicates a restart counter bump, invalidate its tunnels.
(future)
To facilitate these, track tunnels, complete with both SGSN's and GGSN's
address, original and replaced TEIs, all for both user and ctrl plane, in a
single struct. A single expiry entry handles the entire tunnel, instead of
previously four separate expiries for each endpoint identifier.
Add the concept of a "side", being either GGSN or SGSN.
Track the originating side in the gtp_packet_desc. For clarity, explicitly
track the received header TEI in header_tei_rx, since set_tei() overwrites
header_tei to reflect the packet's replaced header TEI, and the originally
received header TEI still needs to be used for matching a Create PDP Context
Response up with its Request (and for logging).
Adjust the test suite to expect tunnel listing strings instead of TEI mappings,
with a bonus of making it a lot easier to grok and including the IP addresses.
Note: the current implementation is as slow as can possibly be, iterating all
the tunnels all the time. Optimizations are kept for a future commit, on
purpose.
BTW, the sequence number mapping/unmapping structures remain unchanged.
Sponsored-by: On-Waves ehi
http://cgit.osmocom.org/openbsc/commit/?id=2d228573f2df28be5d185d8d93ec3b887f526eb7
commit 2d228573f2df28be5d185d8d93ec3b887f526eb7
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Wed Nov 25 16:50:19 2015 +0100
gtphub: fix filename mentioned in comment
http://cgit.osmocom.org/openbsc/commit/?id=f0dc0f3bd9d702c59d46cd358ba9915377136cfc
commit f0dc0f3bd9d702c59d46cd358ba9915377136cfc
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Wed Nov 25 16:45:59 2015 +0100
gtphub: cosmetic/prepare: rename expiry queues.
The expiry queues are already used for resolved GGSN addresses, and will
soon enlist tunnel structs. Hence the naming should be more general.
-----------------------------------------------------------------------
Summary of changes:
openbsc/include/openbsc/gtphub.h | 43 ++++-
openbsc/src/gprs/gtphub.c | 338 ++++++++++++++++++++++++++++++-------
openbsc/src/gprs/gtphub_ares.c | 2 +-
openbsc/src/gprs/gtphub_vty.c | 158 ++++++++---------
openbsc/tests/gtphub/gtphub_test.c | 73 +++++---
5 files changed, 434 insertions(+), 180 deletions(-)
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