GSUP is message based on top of IPA, and hence TCP. We don't want to
have Nagle algorithm enabled, since we are interested in having messages
sent as quickly as possible and there's no need for lower layers to wait
for more data (because we send all the message data at once).
Related: OS#4499
Change-Id: I4653b95ef0d4e1184f81f28408e9eb5d665206ec
If a peer attempts to add a route to an ipa-name that we already have in the
routing system, don't send the routing error to the peer that already has the
name, but to the peer that attempts to re-use it and would cause the collision.
This is fixing a situation where for example a locally attached MSC has name
'MSC-1', and a remote site is proxying GSUP here for a remote MSC that also has
the name 'MSC-1'. Send the routing error back to the proxy, not local 'MSC-1'.
Change-Id: Icafaedc11b5925149d338bdcb987ae985a7323d6
Add mslookup client to find remote home HLRs of unknown IMSIs, and
proxy/forward GSUP for those to the right remote HLR instances.
Add remote_hlr.c to manage one GSUP client per remote HLR GSUP address.
Add proxy.c to keep state about remotely handled IMSIs (remote GSUP address,
MSISDN, and probably more in future patches). The mslookup_server that
determines whether a given MSISDN is attached locally now also needs to look in
the proxy record: it is always the osmo-hlr immediately peering for the MSC
that should respond to mslookup service address queries like SIP and SMPP.
(Only gsup.hlr service is always answered by the home HLR.)
Add dgsm.c to set up an mdns mslookup client, ask for IMSI homes, and to decide
which GSUP is handled locally and which needs to go to a remote HLR.
Add full VTY config and VTY tests.
For a detailed overview of the D-GSM and mslookup related files, please see the
elaborate comment at the top of mslookup.c (already added in an earlier patch).
Change-Id: I2fe453553c90e6ee527ed13a13089900efd488aa
To be prepared for the future in public API, wrap the new osmo_ipa_name struct
in an enum-type and union called osmo_cni_peer.
During code review it was requested to insert an ability to handle different
kinds of peer id, in order to be able to add a Global Title in the future.
Use the generic osmo_cni_peer only in the publicly visible API. For osmo-hlr
internal code, I intend to postpone implementing this into the future, when a
different peer identification actually gets introduced.
This way we don't need to implement it now in all osmo-hlr code paths (save
time now), but still make all external API users aware that this type may be
extended in the future.
Change-Id: Ide9dcdca283ab989240cfc6e53e9211862a199c5
These are seemingly orthogonal changes in one patch, because they are in fact
sufficiently intertwined that we are not willing to spend the time to separate
them. They are also refactoring changes, unlikely to make sense on their own.
** lu_fsm:
Attempting to make luop.c keep state about incoming GSUP requests made me find
shortcomings in several places:
- since it predates osmo_fsm, it is a state machine that does not strictly
enforce the order of state transitions or the right sequence of incoming
events.
- several places OSMO_ASSERT() on data received from the network.
- modifies the subscriber state before a LU is accepted.
- dead code about canceling a subscriber in a previous VLR. That would be a
good thing to actually do, which should also be trivial now that we record
vlr_name and sgsn_name, but I decided to remove the dead code for now.
To both step up the LU game *and* make it easier for me to integrate
osmo_gsup_req handling, I decided to create a lu_fsm, drawing from my, by now,
ample experience of writing osmo_fsms.
** osmo_gsup_req:
Prepare for D-GSM, where osmo-hlr will do proxy routing for remote HLRs /
communicate with remote MSCs via a proxy:
a) It is important that a response that osmo-hlr generates and that is sent
back to a requesting MSC contains all IEs that are needed to route it back to
the requester. Particularly source_name must become destination_name in the
response to be able to even reach the requesting MSC. Other fields are also
necessary to match, which were so far taken care of in individual numerous code
paths.
b) For some operations, the response to a GSUP request is generated
asynchronously (like Update Location Request -> Response, or taking the
response from an EUSE, or the upcoming proxying to a remote HLR). To be able to
feed a request message's information back into the response, we must thus keep
the request data around. Since struct osmo_gsup_message references a lot of
external data, usually with pointers directly into the received msgb, it is not
so trivial to pass GSUP message data around asynchronously, on its own.
osmo_gsup_req is the combined solution for both a and b: it keeps all data for
a GSUP message by taking ownership of the incoming msgb, and it provides an
explicit API "forcing" callers to respond with osmo_gsup_req_respond(), so that
all code paths trivially are definitely responding with the correct IEs set to
match the request's routing (by using osmo_gsup_make_response() recently added
to libosmocore).
Adjust all osmo-hlr code paths to use *only* osmo_gsup_req to respond to
incoming requests received on the GSUP server (above LU code being one of
them).
In fact, the same should be done on the client side. Hence osmo_gsup_req is
implemented in a server/client agnostic way, and is placed in
libosmo-gsupclient. As soon as we see routing errors in complex GSUP setups,
using osmo_gsup_req in the related GSUP client is likely to resolve those
problems without much thinking required beyond making all code paths use it.
libosmo-gsupclient is hence added to osmo-hlr binary's own library
dependencies. It would have been added by the D-GSM proxy routing anyway, we
are just doing it a little sooner.
** cni_peer_id.c / osmo_ipa_name:
We so far handle an IPA unit name as pointer + size, or as just pointer with
implicit talloc size. To ease working with GSUP peer identification data, I
require:
- a non-allocated storage of an IPA Name. It brings the drawback of being
size limited, but our current implementation is anyway only able to handle
MSC and SGSN names of 31 characters (see struct hlr_subscriber).
- a single-argument handle for IPA Name,
- easy to use utility functions like osmo_ipa_name_to_str(), osmo_ipa_name_cmp(), and copying
by simple assignment, a = b.
Hence this patch adds a osmo_ipa_name in cni_peer_id.h and cni_peer_id.c. Heavily
used in LU and osmo_gsup_req.
Depends: libosmocore Id9692880079ea0f219f52d81b1923a76fc640566
Change-Id: I3a8dff3d4a1cbe10d6ab08257a0138d6b2a082d9
Throughout osmo-hlr's code, the GSUP msgb allocation is duplicated as:
msgb_alloc_headroom(1024+16, 16, "foo");
Instead, use one common function to keep the magic numbers in one place.
Change-Id: I40e99b5bc4fd8f750da7643c03b2119ac3bfd95e
Apply the same headers structure that we keep in most Osmocom source trees:
Keep noinst_HEADERS in include/osmocom/hlr and include them using
#include <osmocom/hlr/*.h>
The only header kept in src/ is db_bootstrap.h, because it is generated during
build time. If it was built in include/osmocom/hlr, we would need db.o to
depend on db_bootstrap.h in a different subdir, which automake can't do well.
Change-Id: Ic912fe27f545b85443c5fb713d8c3c8aac23c9ad
Move code to create an Insert Subscriber Data message into a common
function which can be shared by hlr.c and luop.c.
As a consequence, we always encode gsup.cn_domain in the corresponding
msgb and must adjust expected output of the 'gsup' test accordingly.
Change-Id: I6a92ca34cdaadca9eacc774bb1ca386c325ba865
Requested-by: neels
Related: OS#2785
In osmo_gsup_configure_wildcard_apn(), do not compose APN into a local buffer
that becomes invalid as soon as the function exits. Instead, use a caller
provided buf.
Fixes OS#3231 crash:
==20030==ERROR: AddressSanitizer: stack-buffer-underflow on address 0x7fffffffd9c0 at pc 0x7ffff6e9b6c2 bp 0x7fffffffd900 sp 0x7fffffffd0b0
READ of size 2 at 0x7fffffffd9c0 thread T0
#0 0x7ffff6e9b6c1 (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x766c1)
#1 0x7ffff6314419 in tlv_put ../../../../src/libosmocore/include/osmocom/gsm/tlv.h:107
#2 0x7ffff6314419 in msgb_tlv_put ../../../../src/libosmocore/include/osmocom/gsm/tlv.h:299
#3 0x7ffff6314419 in encode_pdp_info ../../../../src/libosmocore/src/gsm/gsup.c:419
#4 0x7ffff6314419 in osmo_gsup_encode ../../../../src/libosmocore/src/gsm/gsup.c:535
#5 0x555555580016 in _luop_tx_gsup ../../../src/osmo-hlr/src/luop.c:54
#6 0x5555555809d8 in lu_op_tx_insert_subscr_data ../../../src/osmo-hlr/src/luop.c:264
#7 0x55555558b356 in rx_upd_loc_req ../../../src/osmo-hlr/src/hlr.c:306
#8 0x55555558b356 in read_cb ../../../src/osmo-hlr/src/hlr.c:365
#9 0x555555586671 in osmo_gsup_server_read_cb ../../../src/osmo-hlr/src/gsup_server.c:105
#10 0x7ffff5b35911 in ipa_server_conn_read ../../../src/libosmo-abis/src/input/ipa.c:356
#11 0x7ffff5b35911 in ipa_server_conn_cb ../../../src/libosmo-abis/src/input/ipa.c:387
#12 0x7ffff5e5541f in osmo_fd_disp_fds ../../../src/libosmocore/src/select.c:216
#13 0x7ffff5e5541f in osmo_select_main ../../../src/libosmocore/src/select.c:256
#14 0x5555555791b6 in main ../../../src/osmo-hlr/src/hlr.c:600
#15 0x7ffff4707a86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21a86)
#16 0x555555579679 in _start (/usr/local/bin/osmo-hlr+0x25679)
Address 0x7fffffffd9c0 is located in stack of thread T0 at offset 16 in frame
#0 0x7ffff63131ff in osmo_gsup_encode ../../../../src/libosmocore/src/gsm/gsup.c:481
This frame has 1 object(s):
[32, 64) 'bcd_buf' <== Memory access at offset 16 underflows this variable
Related: OS#3231
Change-Id: I83d9ef2868bbb01e3f1ddb7920fe735aca172b15
This function relied on implementation details of the luop code.
Port what is necessary for an independent Insert Subscriber Data
Tx operation from the luop code into this function.
A next possible step would be to try to merge both of these
into a common implementation. This will be addressed in a
follow-up change as soon as this change is merged.
The TTCN3 test TC_vty_msisdn_isd is still passing (it currently
triggers the "circuit switched domain" case because it does not
advertise itself as an SGSN in the IPA unit name).
Change-Id: I06c43ece2b48dc63d599000eb6d6d51e08963067
Related: OS#2785
Add ind_bitlen column to auc_3g to record each USIM's IND size according to
3GPP TS 33.102 -- default is 5 bits, as suggested by the spec.
Introduce auc_3g_ind to each connecting GSUP client to use as IND index for
generating auth tuples sent to this client.
With osmo_gsup_server_add_conn(), implement a scheme where clients receive
fixed auc_3g_ind indexes based on the order in which they connect; each new
connection takes the lowest unused auc_3g_ind, so in case one of the clients
restarts, it will most likely receive the same auc_3g_ind, and if one client
disconnects, no other clients' auc_3g_ind are affected.
Add gsup_server_test.c to test the auc_3g_ind index distribution scheme.
Depends: libosmocore I4eac5be0c0b2cede04464c4c3a0873102d952453 for llist_first
Related: OS#1969
Change-Id: If4501ed4ff8e923fa6fe8b80c44c5ad647a8ed60
Add commands to enable/disable Packet Service for a given IMSI. Changes
are synced to DB and propagated at runtime to SGSN (in case of disable
command).
Change-Id: I23163ce8667292443ed61cb15c928357dba4b4be
Related: OS#1645
We also introduce a 'gsup_router' which enables us to route
a transaction to a given VLR. It works based on the SERIAL attribute
communicated at time of the IPA multiplex setup as part of the CCM
sub-protocol.
Pau Espin
Vadim Yanitskiy
Neels Hofmeyr
Harald Welte
Neels Hofmeyr