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Signed-off-by: Michael McTernan <mike.mcternan@wavemobile.com>
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Added some function for adding the unix domain socket support.
Signed-off-by: Alvaro Neira Ayuso <anayuso@sysmocom.de>
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If LAPDm receives an I-Frame while there already is an I-Frame in the
tx_queue the code generates an additional RR (to acknowledge the
received I-Frame). Instead, N(R) of the I-Frame in the tx_queue should
be updated to ACK the data.
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This API allows you to get the lapdm_datalink for a SAPI. It's needed in
the lapdm_test, so make it public.
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Currently it takes 3s to establish a SAPI 3 SACCH connection with
osmo-bts. This is due to the fact, that a broken SABME request is
sent first and and is ignored by the MS. Then, after a T200 timeout
(2s) the SABME command is sent again (this time correctly) and
answered by the MS.
The first SABME message is broken (it has a length field of 3 and
ends with 3 bytes from the tail of the original RSL message),
because of it is expected throughout lapdm.c that msg buffers
containing RSL have msg->l2h == msg->data. Some abis input drivers
fulfill this but IPA doesn't, thus the 3 bytes of the IPA header
are still part of the msg and confuse length computation.
Since internal fields of the msg are modified directly, this is
difficult to see.
This patch adds a new function msgb_pull_to_l3() that explicitely
skips over all headers prepending L3 and therefore resets l1h and
l2h. This function is then used instead of msgb_pull_l2h() which
only worked correctly when msg->l2h == msg->data. In addition,
code manipulating msg->tail and msg->len directly has been replaced
by calls to msgb_trim().
Note that this patch does not fix all issues of this case in the LADP
related code.
Ticket: SYS#192
Sponsored-by: On-Waves ehf
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This function works like osmo_hexdump() and returns a static buffer
containing hex bytes along with markers for the layers.
Note that it uses osmo_hexdump() internally, thus a call to
msgb_hexdump() invalidates the buffer that has been returned by an
earlier call to osmo_hexdump(). In short: don't mix them in a single
call printf().
Sponsored-by: On-Waves ehf
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The legacy 7bit conversion functions (those without the '_n_' in the
name) gave wrong return values on 64 bit platforms due to unproper
signed/unsigned conversions and the usage of SIZE_MAX.
This patch fixes this by using a smaller max size (see
GSM_7BIT_LEGACY_MAX_BUFFER_SIZE, currently set to 64k) for the legacy
wrappers and by using unsigned int for max_septets.
In addition, there are tests now that check the return values of
legacy encoding and decoding.
Sponsored-by: On-Waves ehf
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abis_nm_pchan4chcomb will return a pchan for a given channel
combination but returned a value of the channel combination.
Fix it to return the physical channel combination.
Fixes: Coverity CID 1040767
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simple copy into C from reversed code from www.hackingprojects.net
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This changes the implementations for the reception of RESET and
RESET_ACK to be compatible with 3GPP TS 08.16, 7.3.1:
- Just send a RESET_ACK with correct values back to the SGSN when a
RESET with an invalid NSVCI or NSEI has been received.
- Check RESET_ACK for matching NSEI and NSVCI.
- Ignore unexpected RESET_ACKs.
In addition, use RESET_ACK from a BSS to update the BSS source
address based on the NSVCI to be tolerant with changing UDP source
addresses/ports.
Sponsored-by: On-Waves ehf
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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
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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
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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
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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.
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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
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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]
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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
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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
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Fix the build after I changed the order of header files in the
SMS test.
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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.
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This reverts commit bf991bc0f3006eddf45d494ee7e476a75dbaf36e 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)
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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.
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Separate feature checking from implementation. Supported are clang and
gcc.
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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.
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This is a workaround to make the FreeBSD8.4 and Debian6.0 target
build again. The deprecated attribute doesn't have arguments.
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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.
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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>
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This is required for encoding the SMS header using the alpha numeric
rules.
Reviewed-by: Jacob Erlbeck <jerlbeck@sysmocom.de>
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These functions are not meant to be used by applications and are
only here for the unit tests. Try to document that.
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this causes compiler warnings in user code ever since commit
55cf02221f0654a3f48888f3b13766b671a120f0
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The chan_nr is required to locate timeslot and subslot of access bursts
during handover procedure.
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In order to control layer 1 via primitives, MPH primitives are required.
There is only one (MPH-INFO) primitive defined in TS 04.04 for all control
and measurement functions. A type identifier inside this primitive is used
to differentiate between different functions.
The TCH primitives are used to carry traffic. TCH primitives carry voice
or data traffic, whereas PH-DATA primitives carry FACCH data.
PH_RTS and TCH_RTS (ready-to-send) primitives are used to poll requests
from upper layers.
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The modified macro is still working on a gcc 4.7 and gcc 4.8 after the
removal of the typedef and addition of the unused attribute.
include/osmocom/core/msgb.h: In function ‘msgb_alloc_headroom’:
include/osmocom/core/utils.h:40:51: warning: typedef ‘dummyheadroom_bigger’ locally defined but not used [-Wunused-local-typedefs]
#define osmo_static_assert(exp, name) typedef int dummy##name [(exp) ? 1 : -1];
^
include/osmocom/core/msgb.h:386:2: note: in expansion of macro ‘osmo_static_assert’
osmo_static_assert(size > headroom, headroom_bigger);
^
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Allow to tag the NS service with a custom DSCP.
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This is changing the semantic of the assert. The regression tests
now either need to check the stderr result, the exit status or print
a message when all tests are completed.
This is not that bad as the osmo_generate_backtrace is printing to
the stdout right now.
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This function will re-open all existing log files in the application,
praticularly useful for SIGHUP handlers in case of logrotate
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The tests should unconditionally assert, regardless of debug settings.
This uses the OSMO_ prefix as it's in the global namespace.
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