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* gprs: Fix VTY NSVC initialisation bug by changing gprs_nsvc_create()Jacob Erlbeck2013-11-111-3/+3
| | | | | | | | | | | | | | | | Currently the field nsvci_is_valid is set to 0 in the NSVC object returned by gprs_nsvc_create(). This was a semantic change probably introduced by commit 5e6d679d. As a result, NSVC created via the VTY have this flag set to 0 causing RESET_ACK messages to be rejected. This patch changes the default behaviour of gprs_nsvc_create() to always set this flag. So it must be set to 0 explicitely if needed which is more intuitive and thus less error prone. It fixes breaking connections from the Gbproxy to the SGSN. Ticket: OW#874 Sponsored-by: On-Waves ehf
* implement COMP128 version 2 and 3 A3/A8 algorithmKevin Redon2013-11-033-5/+240
| | | | simple copy into C from reversed code from www.hackingprojects.net
* gprs: Ignore NS RESET_ACK and ALIVE_ACK without RESETJacob Erlbeck2013-10-301-0/+17
| | | | | | | | | | | Currently those messages are answered by a NS_STATUS message when received on an uninitialised (no NS_RESET hat been seen yet) NS_VC which violates GPP TS 08.16 7.3.1 and 7.4.1. This patch adds checks to gprs_ns_vc_create() and eventually returns before the error NS_STATUS message is generated. Sponsored-by: On-Waves ehf
* gprs: Address coverity warning for gprs_ns_tx_status resultHolger Hans Peter Freyther2013-10-251-8/+10
| | | | | | Add a #define for the check and use this in this path as well. Fixes: Coverity CID 1103092
* gprs: Address coverity warning on unchecked return of gprs_ns_tx_reset_ackHolger Hans Peter Freyther2013-10-251-1/+5
| | | | Fixes: Coverity CID 1111545
* gprs: Address coverity warning on unchecked return of gprs_ns_tx_statusHolger Hans Peter Freyther2013-10-251-1/+4
| | | | | | | We could consider creating a CHECK MACRO that will print a message in case of a tx failure. Fixes: Coverity CID 1111544
* gprs: Make sure that the buf is NULL terminated at the endHolger Hans Peter Freyther2013-10-251-0/+1
| | | | Fixes: Coverity CID 1107253
* gb: Create new NSVC object instead of patching the NSVCIJacob Erlbeck2013-10-241-4/+12
| | | | | | | | | When a RESET is received on the same link with a different NSVCI from a BSS on a dynamically created NS connection do not patch the nsvc object but create a new one instead. Thus the NSVCI is never modified at a nsvc object after the NS-VC has been established. Sponsored-by: On-Waves ehf
* gb: Fix RESET handling with changing NSEIJacob Erlbeck2013-10-241-28/+40
| | | | | | | | | This modifies the NS stack's behavior to accept RESET and RESET_ACK NSEI changes for NS-VC dynamically created by RESET messages from BSSes. This feature is not used for NS-VC configured via VTY or NS-VC to a SGSN. Sponsored-by: On-Waves ehf
* gb: Fix NS RESET/RESET_ACK abnormal casesJacob Erlbeck2013-10-241-56/+215
| | | | | | | | | | | | | | | | 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
* gb: Fix gprs_nsvc_delete() to free ctr groupJacob Erlbeck2013-10-241-0/+1
| | | | | | | | | | | | | | | | | | | | This fixes a SEGV error that happens the next time the statistics are updated. Addresses: Program terminated with signal 11, Segmentation fault. #0 0xb7711fa5 in rate_ctr_group_intv (grp=<optimized out>) at rate_ctr.c:107 107 for (i = 0; i < grp->desc->num_ctr; i++) { #0 0xb7711fa5 in rate_ctr_group_intv (grp=<optimized out>) at rate_ctr.c:107 #1 rate_ctr_timer_cb (data=0x0) at rate_ctr.c:129 #2 0xb770ec59 in osmo_timers_update () at timer.c:243 #3 0xb770ef7a in osmo_select_main (polling=0) at select.c:133 #4 0x08049987 in main (argc=3, argv=0xbfba8084) at gb_proxy_main.c:306 Sponsored-by: On-Waves ehf
* gb/vty: Fix the VTY node string for L_NS_NODEJacob Erlbeck2013-10-241-1/+1
| | | | | | | Use 'config-ns' instead of plain 'ns' and append a blank after the '#' to make the vty python test script work. Sponsored-by: On-Waves ehf
* gb/vty: Perform NS-VC operations based on NS-VCIJacob Erlbeck2013-10-241-5/+15
| | | | | | | | | This adds a 'nsvc nsvci <0-65535> (block|unblock|reset)' vty command. It selects the NS-VC based on the nsvci instead of using the first with a matching NSEI, like it is done when the 'nsei' keyword is used instead. Sponsored-by: On-Waves ehf
* gb: Fix gprs_active_nsvc_by_nsei()Jacob Erlbeck2013-10-171-2/+2
| | | | | | | The state matching condition is inverted. This is corrected by this fix. Sponsored-by: On-Waves ehf
* release: Prepare the 0.6.4 release of libosmocoreHolger Hans Peter Freyther2013-10-151-1/+1
| | | | New interfaces and ABI incompatible changes in the GB library
* ussd: Fix text of RELEASE COMPLETEAlexander Huemer2013-10-151-1/+1
| | | | | | Before the assigned value (0xFF) was truncated, reg->text[0] is of type char. A corresponding test for the same value in openbsc could only fail.
* gb: Fix gprs_ns_rx_reset to not create NS-VC duplicatesJacob Erlbeck2013-10-151-74/+149
| | | | | | | | | | | | | | | | | | | | | | | | | 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
* gb: Add functions to access the LL part of the NS-VC objectsJacob Erlbeck2013-10-152-6/+40
| | | | | | | | 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
* gb: When sending on a NS-VC group use the first active NS-VCJacob Erlbeck2013-10-141-18/+29
| | | | | | | | | | | | 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
* tests/gb: Show invoked signals in test outputJacob Erlbeck2013-10-111-0/+1
| | | | | | | 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
* vty: Make vty_event dispatch signals and use it in the testcaseHolger Hans Peter Freyther2013-10-101-1/+13
| | | | | | | | | 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.
* gb: Use the NS-VCI to find an existing NS-VCJacob Erlbeck2013-10-081-4/+4
| | | | | | | | | | | | | | | | 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
* gb: Fix NS-RESET response message orderJacob Erlbeck2013-10-081-5/+7
| | | | | | | | | | | | | | 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
* gb: Separate nsvc creation from NS message processingJacob Erlbeck2013-10-081-55/+144
| | | | | | | | | | | | 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
* gsm48: Added 'Network Daylight Saving Time' info elementJacob Erlbeck2013-09-161-0/+1
| | | | | | | | 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
* vty: Allow vty_go_parent() in all nodes.Jacob Erlbeck2013-09-111-5/+25
| | | | | | | 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.
* vty: Replace 'enum node_type' by 'int' for last_nodeJacob Erlbeck2013-09-101-1/+1
| | | | | In this case the last_node variable may hold values that are not in enum node_type, so int is used instead.
* vty: Add vty_install_default() and use for the vty nodesJacob Erlbeck2013-09-083-7/+16
| | | | | | | | | | | 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
* vty: Refactored vty_go_parent(), 'end' and 'exit'Jacob Erlbeck2013-09-081-22/+35
| | | | | | Put all 'exit' logic into vty_go_parent() and replace the implementations of 'exit' and 'end' by generic ones that use vty_go_parent().
* vty: Rename is_config() to is_config_child()Jacob Erlbeck2013-09-081-3/+3
| | | | | The function is_config() returns 0 for CONFIG_NODE. Since that node is a config node, the function is renamed to resolve this.
* sms: Implement encoding the address as alphanumeric typeHolger Hans Peter Freyther2013-09-041-9/+21
| | | | | | 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.
* sms: Added comment about the gsm_7bit_alphabet tableJacob Erlbeck2013-08-121-2/+6
| | | | | The table structure is not intuitive, so this comment shall aid to understand this.
* sms: Added result buffer size parameter to 7bit conv funsJacob Erlbeck2013-08-123-59/+104
| | | | | | | | | | | | | 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.
* lapd: Remove the double NULL check idiom with msgb_freeHolger Hans Peter Freyther2013-08-091-22/+13
| | | | | | | | | | | | | | 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."
* gsm: The LAPDm prim/structs changed, increment current versionHolger Hans Peter Freyther2013-08-091-1/+1
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* Add special 7-bit encoding and decoding functions for USSD codingAndreas Eversberg2013-08-083-5/+38
| | | | | | | | | | | | | | | | | | | | | | | | 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>
* encoding: Provide an overload for the gsm_7bit_encode and a simple testHolger Hans Peter Freyther2013-08-082-2/+9
| | | | | | | This is required for encoding the SMS header using the alpha numeric rules. Reviewed-by: Jacob Erlbeck <jerlbeck@sysmocom.de>
* vty: Support multi-char separators and end stringsJacob Erlbeck2013-08-061-4/+5
| | | | | In vty_cmd_string_from_valstr() include the real string lengths of the sep and end arguments into the buffer size calculation.
* vty: Fix misusage of snprintf in vty/utils.cJacob Erlbeck2013-08-061-2/+2
| | | | | | | | | | | | | | | 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]
* vty: Fix logically dead code in the description handlingHolger Hans Peter Freyther2013-07-141-1/+1
| | | | | | | | | | 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
* gsm0808.c: Add TLV definition for LAYER3_HEADER_INFORMATIONDmitri Soloviev2013-07-111-0/+1
| | | | | This is required for osmo-bsc to parse Alcatel S-12 CIPHER MODE COMMAND in osmo-bsc.
* LAPD: Free resume/re-establishment msgb if it carries no contentAndreas Eversberg2013-07-101-2/+5
| | | | | | | | | 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.
* gsm: Revert the gsm_7bit_encode changes as they are wrongHolger Hans Peter Freyther2013-07-072-30/+9
| | | | | | | | | | | | | | | This reverts commit f996b05dbddccb8e8788dd69777a4fedfa2373eb and 2b0cac4ef83137ee0bdd583aee877eac467abeab. 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.
* Fix: Handle returned length by gsm_7bit_encode correctlyAndreas Eversberg2013-07-061-9/+24
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* Fix encoding of last character at 7bit encoding functionAndreas Eversberg2013-07-061-0/+6
| | | | | | 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.
* libosmogb: Add function to close NS instance without destroying itHolger Hans Peter Freyther2013-07-062-7/+13
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* LAPDm: Allow sending unit data on DCCHAndreas Eversberg2013-07-061-10/+18
| | | | It is used to transfer PHYSICAL INFORMATION message to the MS.
* LAPDm: Fix re-establishment of datalinkAndreas Eversberg2013-07-061-5/+14
| | | | | | | | | | If the datalink fails or if handover or assignment to a new channel fails, it is re-establised by sending SABM again. The length of establish message is 0 in this case. The length is used to differentiate between re-establishment and contention resolution, which has to be handled differently. See TS 04.06 Chapter 5.4.2.1
* get_value_string: Null terminate after the call to snprintfHolger Hans Peter Freyther2013-07-041-0/+1
| | | | | | | It is impossible that the snprintf will fill the entire namebuf but just follow the idiom to make sure it is null terminated. Related: Coverity CID 1040676
* vty: Attempt to fix various meam leaks in the VTY lookup codeHolger Hans Peter Freyther2013-07-031-0/+3
| | | | | | | | | | These routines were not freeing vectors used for the lookup. On review it is fixing another path not detected by coverity. The danger is a double free in tab completion now. It is difficult to test this. Fixes: Coverity CID 23037, CID 23038
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