Under special circumstances (see below) receiving a NS-RESET leads to
duplicated NS-VC entries.
This happens when the source port of a NS-VC changes to a new one
that has already been used by another NS-VC.
This patch changes gprs_ns_rx_reset() to check for this case and to
use the existing NS-VC object. The NS-VC object that was associated
with the source address before is detached from this source but kept
in the NS-VC list so that it can be reattached when a correspondent
NS-RESET is received later on. Meanwhile it will have a cleared link
layer address which will not match a real link info.
A new counter NS_CTR_REPLACED is incremented each time when the NS-VC
object is replacing another one. A new signal S_NS_REPLACED is added
which gets dispatched in this case, too.
Another new counter NS_CTR_NSEI_CHG is incremented each time when the
NSEI of a NS-VC object (with fixed NSVCI) changes.
Ticket: OW#874
Sponsored-by: On-Waves ehf
Adds the functions gprs_ns_ll_copy() and gprs_ns_ll_clear(). Renames
gprs_ns_format_peer() to gprs_ns_ll_str(). All of these functions
uniformly access the link layer part within the NS-VC objects.
Sponsored-by: On-Waves ehf
Currently this first NS-VC with a matching NSEI is always used to
send a UNITDATA message via gprs_ns_sendmsg(). If the NS-VC found is
either dead or blocked, an error is returned.
This patch changes to code to skip blocked or dead NS-VCs while
searching and return the error if no usable NS-VC is found. This
makes it possible to have several NS-VCs per connection group.
Sponsored-by: On-Waves ehf
Register an osmo signal handler to print a short notice about every
SS_L_NS signal that is generated while processing the tests.
Sponsored-by: On-Waves ehf
The testcase didn't work on Ubuntu 12.04 because vty_create will
directly call vty_event (e.g. not through the plt). This means
that the approach to override vty_event in the testcase failed.
Use the signal interface of libosmocore and make the testcase
use it. The signals can be generally useful as well.
Currently when a NS-RESET is recevied over a link that has not yet
been associated with a NS-VC, the NSEI is used to find an existing
NS-VC. If one is found, the reset procedure is initiated.
This behaviour is not conformant with 3GPP TS 08.16 (see chapter
4.2.3) which allows to use several NS-VC between two endpoints in
parallel.
The patch changes the implementation to use the NSVCI instead
of the NSEI to search for an existing NS-VC object.
Ticket: OW#874
Sponsored-by: On-Waves ehf
According to 3GPP TS 08.16, 7.3 "Reset procedure" the entity
receiving a NS-RESET PDU responds with a NS-RESET-ACK and 'then'
starts the test procedure which essentially means, that a NS-ALIVE
gets sent and a timer is started.
Currently the NS-ALIVE is sent before the NS-RESET-ACK.
This patch fixes the implementation by reversing the order in which
these messages are sent.
Sponsored-by: On-Waves ehf
This patch refactors gprs_ns_rcvmsg() by moving the parts relevant to
the NS messages into the new functions gprs_ns_vc_create() (nsvc
object creation) and gprs_ns_process_msg() (main NS automaton). These
do not contain code that directly depends on the link layer (they
call other functions that still do). This reduces the gprs_ns_rcvmsg()
function to calling these two functions and optionally setting up the
link layer specific fields of the nsvc.
Sponsored-by: On-Waves ehf
This explicitely allows aliasing of this struct to avoid the warning
shown below. Note, that this warning isn't show when
'-fno-strict-aliasing' is used.
Addresses:
gb/gprs_ns_test.c:85:54: warning: dereferencing type-punned pointer will
break strict-aliasing rules [-Wstrict-aliasing]
It started to behave weird on Debian Testing (GCC 4.8), I compiled it
with address sanitizer support and set a breakpoint in
__asan_report_error to get a backtrace.
gb/bssgp_fc_test.c: In function ‘fc_out_cb’:
gb/bssgp_fc_test.c:46:1: warning: no return statement in function returning non-void [-Wreturn-type]
gb/bssgp_fc_test.c: In function ‘fc_in’:
gb/bssgp_fc_test.c:56:1: warning: no return statement in function returning non-void [-Wreturn-type]
gb/bssgp_fc_test.c: In function ‘test_fc’:
gb/bssgp_fc_test.c:79:3: warning: implicit declaration of function ‘usleep’ [-Wimplicit-function-declaration]
This information element has been added to the MM Information
message in GSM24.008. This patch adds it to the tlv_definition
to keep the TLV parser from breaking.
Ticket: OW#978
This patch removes an assertion of node > CONFIG_NODE and changes
the function to handle all nodes properly.
For the sake of completeness, the generic 'exit' command
implementation is extended to work properly with all nodes, too.
This adds the vty_install_default() function that is basically the
install_default() function plus the registration of the commands
'exit' and 'end'. The latter is only provided in subnodes of
ENABLED_NODE and CONFIG_NONE.
The VTY test program is extended to check these commands.
Ticket: OW#952
The number of digits is the number of used octets times two (two
digits per octet). The result has been successfully dissected by
wireshark. It has not been tested with real phones.
This reverts commit bf991bc0f3 and
fixes the bug instead. It's just sufficient to remove the defined()
test, since identifiers that aren't macros are just considered as
0 when used with #if. (see cpp info page, section 4.2.2 'If'
in cpp-4.6.info)
The code started to use #if defined(...) but the value was always
for GCC/Clang. The only difference was that for older compilers
the value of the definition was 0. Conditionally define these
macros.
Fix type of argument 'argv'.
Addresses:
conv/conv_test.c:358:5: error: second parameter of 'main' (argument
array) must
be of type 'char **'
int main(int argc, char argv[])
Add a new core/defs.h file for definitions that can be used from
within header files without including prototypes and extern
declarations. It's primarily meant for macro definitions and basic
typedefs.
Move the definition of OSMO_DEPRECATED there and use compiler version
info to avoid compiler errors.
The 7bit<->8bit encoding/decoding functions didn't check whether
there is still enough space in the destination buffer. Therefore a
buffer size parameter has been added to each of the functions which
is used to truncate the output if the buffer is too small.
In addition, the return value of the decoding functions has been
changed to number of characters written (excluding \0), so this
value is always equal to strlen(decoded).
The old functions are still available as wrapper functions.
if (ptr)
msgb_free(ptr)
extends to:
if (ptr)
talloc_free(ptr)
And according to the talloc documentation a talloc_free(NULL)
will not crash: "... Likewise, if "ptr" is NULL, then the function
will make no modifications and returns -1."
Renamed gsm_7bit_ussd() to test_7bit_ussd() and extended the function
to take the expected binary encoding and eventually added trailing
bytes in the re-decoded text as arguments. These are used to check
assertions of the right behaviour instead of solely relying on
regression data, because the value are determined by the spec and
fixed and it is more obvious this way. Especially concerning the case
with the duplicated \r which can easily be overlooked when it's only
present in the ok file.
Handling 7-bit coding is a little different for USSD, as TS 03.38
states:
To avoid the situation where the receiving entity confuses 7 binary
zero pad bits as the @ character, the carriage return or <CR>
character shall be used for padding in this situation [...].
If <CR> is intended to be the last character and the message
(including the wanted <CR>) ends on an octet boundary, then another
<CR> must be added together with a padding bit 0. The receiving entity
will perform the carriage return function twice, but this will not
result in misoperation as the definition of <CR> [...] is identical to
the definition of <CR><CR>.
The receiving entity shall remove the final <CR> character where the
message ends on an octet boundary with <CR> as the last character.
Jacob has verified the fix with fakeBTS and the wireshark dissector.
Fixes: OW#947
Reviewed-by: Jacob Erlbeck <jerlbeck@sysmocom.de>
Compiled with ubuntu 1204 (precise), where -Wformat-security is enabled by
-Wall.
Test yields ok, but the current implementation doesn't properly support
multi-character separators and end strings. So the test output is truncated.
Addresses:
utils.c: In function 'vty_cmd_string_from_valstr':
utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security]
utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security]
utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security]
utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security]
osmo-auc-gen.c:217:3: warning: implicit declaration of function ‘time’ [-Wimplicit-function-declaration]
osmo-auc-gen.c:249:3: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 2 has type ‘uint64_t’ [-Wformat]
Fixes: Coverity CID 1040668
The code most likely wanted to check the result of argv_concat.
To do this we need to dereference the dptr.
Logically dead code (DEADCODE)
dead_error_line: Execution cannot reach this statement "return 1;
Fixes: Coverity CID 1040675
lapdm.c takes the re-establishment message and forwards it to lapd_core.c,
so we can assume that msgb is set at primitive. In case there is data in
the re-establishment msg, it is moved into send_buffer. In case of no
data (0 length), it must be freed.
Fixes an issue spotted by Coverity Scan.
This reverts commit f996b05dbd
and 2b0cac4ef8. A detailed
explanation can be found here:
http://lists.osmocom.org/pipermail/openbsc/2013-July/004737.html
The short description is that:
1.) The API should return (as out parameter) the number of
octets used.
2.) The handling for the <CR> encoding only applies to USSD
and it is incomplete. On top of that it broke the SMS test.
Holger Hans Peter Freyther
Alexander Huemer