This is consuming the new signals and allows to install several
different CDR/observing/event/audit modules in the future. For
getting the bytes in/out the code would have had to undo what the
rate counter is doing and at the same time adding a "total" to
the ratecounter didn't look like a good idea, the same went for
making it a plain counter.
Begin writing the values one by one and open/closing a new FILE
for every log messages. This is not efficient but easily deals
with external truncation/rotation of the file (no fstat for and
checking the links and size). As usual we will wait and see if
this is an issue.
Add some new members to our PDP context structure to see what it
is about.
If QoS is only three bytes it does not include the allocation/
retention policy. Otherwise it does. Copy it depending on that.
We should have a macro for the clamping to reduce code duplication.
The insanity does come from the MAP data and this seems to be
the easiest in terms of complexity. It is an array of bytes that
is transported from MAPProxy to the SGSN and then simply forwarded.
The case of more than three bytes is neither unit nor manually
tested so far.
sgsn_create_pdp_ctx should use the subscribed QoS. When selecting
the PDP context we inject the QoS to be used into the TLV structure
and use it during the request. Assume a "qos-Subscribed" structure
only with three bytes and prepend the Allocation/Retention policy
to the request.
The MSISDN should be present for "security" reasons in the first
activation of a PDP context. Take the encoded MSISDN, store it for
future use and then put it into the PDP activation request.
The MM Context contains a field for a decoded MSISDN already. As
we need to forward the data to the GGSN I want to avoid having to
store TON and NPI in another place. Simply store the data in the
encoded form.
Currently the PDP contexts are hard freed (via sgsn_pdp_ctx_free)
at some places in gprs_gmm.c on the reception of a Detach Req and on
re-use of an IMSI that is already associated with an MM context. This
can lead to segfaults when there is a pending request or a data
indication at libgtp.
This patch add a new function sgsn_pdp_ctx_terminate that de-associates
the PTP context from the MM context, deactivates SNDCP, sets pdp->mm
to NULL and then calls sgsn_delete_pdp_ctx. sgsn_libgtp is updated to
check for pdp->mm being non-NULL before dereferencing it. The
sgsn_pdp_ctx_terminate function will be called for each PDP context of
an MM context before this context is going to be deleted via
sgsn_mm_ctx_free. To ensure, that the ctx->llme (which is accessed
during the deactivation of SNDCP) remains valid, the call to
gprs_llgmm_assign is moved after the call to sgsn_mm_ctx_free. The
handling of re-used IMSIs is changed to mimic the processing of a
Detach Req.
Addresses:
<0002> gprs_gmm.c:654 MM(/f6b31ab0) Deleting old MM Context for same
IMSI p_tmsi_old=0xc6f19134
<000f> gprs_sgsn.c:259 PDP freeing PDP context that still has a
libgtp handle attached to it, this shouldn't happen!
[...]
SEGFAULT
Ticket: OW#1311
Sponsored-by: On-Waves ehf
CC sgsn_libgtp.o
sgsn_libgtp.c: In function ‘create_pdp_conf’:
sgsn_libgtp.c:262:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]
int rc;
^
sgsn_libgtp.c: In function ‘cb_data_ind’:
sgsn_libgtp.c:432:6: warning: variable ‘rc’ set but not used [-Wunused-but-set-variable]
int rc;
In case of a failure this method didn't set the pctx->lib back to
NULL. In case of a timeout the callback will be made with pdp=NULL
and this would lead to leaking the PDP context. Check for the case
of having a pctx->lib != pdp and free it.
This resolves:
<000f> gprs_sgsn.c:259 freeing PDP context that still has a libgtp handle attached to it, this shouldn't happen!
The code was written like checking the return value of the
osmo_fd_register but the rc variable was not assigned for the
subsequent calls.
Fixes: Coverity CID 1040741
A crash was obsserved in cb_data_ind() when mm is dereferenced.
This patch adds some safeguards that try to prevent the library handle
back-pointer to the pdp_ctx to be NULL, and print a stack backtrace in
case we are free() ing the sgsn-side pdp_ctx while there's still a
library handle attached.
libosmogsm is a new library that is distributed in the libosmocore.
Now, openbsc depends on it. This patch gets openbsc with this
change.
This patch also rewrites all include path to the new
osmocom/[gsm|core]
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
The reason for this is quite simple: We want to make sure anyone
running a customized version of OpenBSC to operate a network will
have to release all custom modifiations to the source code.
sgsn_rx_sndcp_ud_ind() can no longer make the assumption that msgb_bcid() is
valid, as this is only true for an un-fragmented SN-PDU. So instead,
we now store the RAID in the SNDCP Entity and pass it as an explicit
argument to sgsn_rx_sndcp_ud_ind().
We now have a function that generates BSSGP PS and CS paging request.
It is called from the libgtp code when we receive a GTP packet from
the GGSN for a MM context that is in SUSPEND state. We then issue
a PS paging request to the Cell with the BVCI where the last RA update
was being performed.
TODO: We still don't enqueue the GTP packet (and transmit it on paging
complete), and we don't rate-limit the paging requests, i.e. every GTP packet
will trigger another paging request.
We probably also need some kind of logic that marks the phone as UNREGISTERED
if it doesn't respond to paging requests for some time.
This only works for packets that are small enough to not need
fragmentation at the SNDCP layer (dns queries, ntp and the like).
It requires libgtp built from OpenGGSN dc3744fda045f9fca83de6881176987335a309a8
or later. Plain 0.90 will NOT work.
Using this version, I could see bi-directional traffic from various
phones going all the way through BTS, OsmoSGSN, OpenGGSN and being routed
to and from the real internet. Time to celebrate...
We have to copy the sin_addr.s_addr, rather than the entire sin_addr. The
latter results in the destination interpreting it as an IPv6 address, as
the only differentiator between IPv4 and IPv6 is the size of the payload
of this IE.
* store LLC SAPI as part of PDP ctx
* store NSEI + BVCI as part of MM ctx
* export gsm48_tx_gsm_act_pdp_acc() and call it from sgsn_libgtp.c
* create and use gsm48_tx_gsm_act_pdp_rej for error cases
* print SAPI as part of VTY show pdp
libgtp of the OpenGGSN project will allow us to speak the GTPv0/v1
protocol of the interface between SGSN and GGSN.
This commit includes code for the main libgtp integration (file
descriptor, select loop, timer) as well as code to encode/send
a CREATE PDP CONTEXT request.
Holger Hans Peter Freyther
Daniel Willmann
Harald Welte
Sylvain Munaut