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2021-02-19gprs_ns2: add value_string for GPRS_NS2_AFF_CAUSE_SNS_NO_ENDPOINTSAlexander Couzens1-0/+1
Change-Id: I7c9245be248cb8697a370f80021612c14efa5cbb
2021-02-19gprs_ns2_message: tx_status: move all cause dependent code into the switch/caseAlexander Couzens1-10/+11
Change-Id: I8f1e0962c6f5f0c7287990bb7608d0cc9b86dfdb
2021-02-19gprs_ns2: truncate the NS_STATUS to the MTUAlexander Couzens1-2/+7
A NS Status can contain the original NS message which might result in a NS PDU which exceeds the MTU of the NS-VC. Truncate the original message to the maximum possible. Based on truncate BSSGP status message. Related: OS#4889 Change-Id: I35d8f8bf0eae890f4db56423da0b23b638d24311
2021-02-19gprs_ns2_fr: pass MTU changes to the NSEAlexander Couzens1-2/+29
When the MTU of the frame relay device changes, update the bind and notify all NSEs. Related: OS#4889 Change-Id: I946f7655c9526ffd98dabdce219c6a419b71e00c
2021-02-19gprs_ns2_sns: rename fsm events to include RX or REQ prefixAlexander Couzens1-67/+67
An event which originates by a received PDU is prefixed by RX. An event which originates by code gets a REQ prefix. Fixes: OS#5014 Change-Id: Ia8a6378cdca19b086e89058b1cc055f45c0bba7b
2021-02-19gprs_ns2: make gprs_ns2_recv_prim() always take msgb ownershipAlexander Couzens1-11/+25
Have a clear ownership of the msgb to prevent any leaks. Related: OS#5022 Change-Id: I67e70561e7aae4d4556a02f03a8af6c2daf5ff9c
2021-02-19gprs_ns2: fix typo in function name ns2_load_sharing_moduloAlexander Couzens1-2/+2
It's a modulo operation, not modulo*r*. Change-Id: I0345f2bcac9c57cf7efe8ff27fda4d049e04d5cc
2021-02-19gprs_ns2: implement a simple load sharing for UDPAlexander Couzens3-1/+142
Implement the load sharing based on modulo of the LSP. As long the gprs_ns2 doesn't support the resource distribution function (48.016 ยง 4.4a) this simple approach is good enought. Fixes: OS#4836 Change-Id: I8c2fe5d647694886ac600470fca6ea5d5d210a85
2021-02-19gprs_ns2_vty: add optional argument signalling and data weights to `nsvc udp`Alexander Couzens2-11/+74
A static configured UDP NSVC can have signalling and data weights Related: SYS#5354 Change-Id: Id363937c64e786c55e3136401ebdb44052415e0f
2021-02-19gprs_ns2: rework IP-SNS bindsAlexander Couzens6-37/+469
Introduce a `ip-sns-bind BINDID` vty command within a `nse` vty object. The ip-sns-bind defines the binds which will be used by the dynamic configuration with IP-SNS. This is only the first part which only uses the binds when doing a new SNS configuration. The outgoing add procedure will be supported in a later patch when the SNS fsm supports outgoing procedures. This is a behaviour change of the API and must be synchronized with the osmo-pcu. Otherwise SNS won't work with osmo-pcu. Related: SYS#5354 Change-Id: I9ab8092bf286e7d90e92f5702a5404425e959c84
2021-02-18gsm: Introduce API osmo_gsm48_rest_octets_si13_decodePau Espin Pedrol7-1/+249
Related: SYS#5358 Change-Id: I74fb0a3afc1ac4aadbfc609b882d929401f790eb
2021-02-17logging: gsmtap: Store TID instead of PID in pkt hdrPau Espin Pedrol1-5/+5
This allows differentiating threads withing an application, while still keeping same numbering for single-threaded application (since first thread ID is always the same as the process group ID). Related: OS#5027 Change-Id: I33da02524fc064e133b2b762af7060139c4cfd81
2021-02-17logging: gsmtap: Fix fill PID field not stored in network byte orderPau Espin Pedrol1-1/+1
Recent commit filling this field forgot to convert it to network byte order. Related: OS#5027 Fixes: bb149ecda21a4f9b102245ffc6a2870592d32c0b Change-Id: I50857f35cb28138fa6f28100afeaa00f492f303a
2021-02-17Introduce osmo_gettid() APIPau Espin Pedrol5-0/+105
This API wraps conventional gettid() linux-specific API, which even in Linux itself is sometimes not properly supported/announced. This API also allows future porting to other platforms if needed, and so far falls back to getpid() if no gettid(9 can be found. Code ported from osmo-trx.git, see commit 7a07de1efd4eb7cc11c33d3ad25cb2df70aa1ef1. Related: OS#5027 Change-Id: Id7534beeb22fcd50813dab76dd68818e2ff87ec2
2021-02-16gsm_08_58, gsm_44_004: add struct for l1 informationPhilipp Maier3-0/+36
Libosmocore currently does not offer any structs to encode and decode the l1 information on RSL level and the sacch l1 header on the air interface level. Both structs are identical but the field order in the first octet is reversed. Change-Id: I23c1890b89d5a0574eb05dace9f64cc59d6f6df7
2021-02-16logging: gsmtap: Fill PID field for each messagePau Espin Pedrol1-0/+7
It was recently discovered that PID field in gsmtap log messages was always set to 0. Before this patch, the field was never being set. The approach of this patch is to record the PID of process one, in order to avoid calling getpid() syscall on each log line to be sent. The counterpart of this optimization is that eventual fork() calls would still keep the old incorrect value, but I think nobody can safely assume that fork() is possible once all this kind of infrastructure has already been configured (fork() should only be done really at the start of the program before any osmocom foo is initialized, or to immediatelly call exec()). Related: OS#5027 Change-Id: I7db00d1810f0860166bffa0bda8566caa82e06a9
2021-02-16gprs_ns2: inform the NS user (BSSGP) about the MTU of a NSEAlexander Couzens9-4/+130
The BSSGP layer needs to know the MTU of the NS UNIDATA payload. The MTU can be 0 if the NSE doesn't contain any NSVC. Every status indication will contain the mtu value. The MTU in the status indication contains the maximum transfer unit of a BSSGP message. From NS side the maximum SDU. Related: OS#4889 Change-Id: I5016b295db6185ec131d83089cf6c806e34ef1b6
2021-02-15gsm: Fix encoding of gsm0808_cell_id_list2 with CGI-PS typesPau Espin Pedrol2-3/+63
CGI-PS type doesn't exist in GSM 08.08 Cell Id lists. That type of cell id is osmocom-specific and used internally. In here CGI-PS is automatically converted to CGI (since the later is an extension of this one). The encode/decode_cell_id_u are left intact (comment added) since those can still be used (and are used by RIM code) to encode/decode TS 48.018 Cell Identifiers. Related: SYS#4909 Change-Id: Id74f4577c397c1ba696f00395858311bd82cb2c8
2021-02-15gsm0808_utils: Move static function further up in filePau Espin Pedrol1-46/+46
It's a static internal function, so it makes sense to have it at start of its related section. It will be used by other functions in follow up patches. Change-Id: I60f61f8f7bb6543feb068bdcee76d3b752565c95
2021-02-15gsm: Support converting to cgi-ps in gsm0808_cell_id_from_cgi()Pau Espin Pedrol1-0/+8
This is not really used nowadays, but added for completeness in case someone wants to use it. Change-Id: I1361b044bd897d04133cda6fd62c16852700b17a
2021-02-15comsetic: gsm0808_test: Fix trailing whitespacePau Espin Pedrol1-2/+2
Change-Id: I7f48e292fefe555939129f4000303e630a12cc50
2021-02-15gprs_ns2_sns: fix typo in doxygen commentAlexander Couzens1-2/+2
Fixes: 5bef2cc4bd58 ("ns2: Improve/extend doxygen comments for new ns2 implementation") Change-Id: I21b51791aa149d9a5b13169d1cf8c2857c55774a
2021-02-15gprs_ns2: fix comment of alive NS-VCAlexander Couzens1-2/+2
There is no active NS-VCs only alive or dead. Change-Id: Idb5d2ae4a99a472e38601ff841b8046ecf89d1bc
2021-02-15BVC FSM: Treat overlapping BVC-RESET as implicit ACKHarald Welte1-1/+8
If the BSS (or SGSN) has sent a BVC-RESET PDU for a BVCI to the SGSN (or BSS) and is awaiting a BVC-RESET- ACK PDU in response, but instead receives a BVC-RESET PDU indicating the same BVCI, then this shall be interpreted as a BVC-RESET ACK PDU and the T2 timer shall be stopped. Related: OS#4974 Change-Id: I4d15733f9f205cb563b66ef9e41dc8df50151900
2021-02-15gprs_ns2_vc_fsm: remove debug line of the alive_timerAlexander Couzens1-2/+0
The log line sneaked in when fixing the alive ms Fixes: ab0e8646c4aa ("gprs_ns2_vc_fsm: use CLOCK_MONOTONIC for alive elapsed timer") Change-Id: Iffe367b240f47c39232bbc26991c19752a1c75ad
2021-02-13gsm: Fix bitfield order in dtap_headerPau Espin Pedrol1-3/+3
This bitfield was added later and all osmocom code still uses the old field contain 1 byte "link_id". There's only one known user of the new bitfield which only uses it to log the SAPI name in osmocom, so no logical breakage is expected with this change (other than fixing a log line). While at it, fix a typo in comment describing related enum. Related: SYS#4909 Fixes: 392f607f2d42eb2839ccfc4c1b9e2c7cfaf3bcc2 Change-Id: I84866f03ee642aa7f1da273c93a16a38234cfa67
2021-02-12bssgp_bvc_fsm: Consistent namingDaniel Willmann3-9/+9
bssgp_bvc_get_features_* are fsm "methods" and the name should indicate that just lika all other function names in bssgp_bvc_fsm.h Change-Id: I30fbbe36cdabf9635eaf4dfb1e93c8ce0f667b39
2021-02-12bssgp2_enc_status: Truncate STATUS message to maximum PDU lengthDaniel Willmann3-6/+17
Related: OS#4889 Change-Id: Ic39d918c56399ceb0431299ce938e3bf276f678a
2021-02-12bssgp_bvc_fsm: Set/get maximum BSSGP PDU lengthDaniel Willmann3-0/+28
Add functions to get/set the maximum supported BSSGP PDU size by the NS layer. IPv4 and IPv6 should not matter since we can just enable IP fragmentation and send NS PDUs up to 2**16 + bytes. Frame relay does not support fragmentation and this is the reason we need to be aware of the maximum PDU size. Luckily with 1600 bytes the MTU in frame relay can hold a regular IP packet including NS/BSSGP overhead. On the NS layer this corresponds to the size of an NS SDU in NS-UNITDATA (3GPP TS 48.016 Ch. 9.2.10) Change-Id: I9bb82ead27366b7370c9ff968e03ca2113ec11f0 Related: OS#4889
2021-02-12tests/gb: Add more complex osmo-ns-dummy.cfgDaniel Willmann1-0/+24
write config will not print out any configuration for bind/nse unless we configure some. This way we can catch more issues with incompatible configs such as https://gerrit.osmocom.org/c/libosmocore/+/22878 Change-Id: Iad422ee013c82a6cb96af8ce4eb3af8b0936a4c9 Related: OS#4887
2021-02-12ns2: Fix incompatible VTY configs when writing configDaniel Willmann1-1/+1
It seems like we still don't have NS2 VTY tests running in libosmocore so this only got caught once osmo-sgsn/osmo-gbproxy builds failed. Change-Id: Id3cd407b05457a4703ee38c4b1b1b65800bbd30e Related: OS#4887
2021-02-12gprs_ns2_vty: use strcmp() instead of strncmp()Alexander Couzens1-1/+1
Otherwise substring wouldn't be detected. E.g. local vs local2 Change-Id: I183b5176a1d8a295b7551ad186b3565adeb3d5e7
2021-02-12gprs_ns2_vc_fsm: reset the alive elapsed timeout everytimeAlexander Couzens1-0/+1
The alive elapsed timeout was only set once on the start of the test procedure but not every time an ALIVE PDU was sent. Fixes: OS#4997 Change-Id: I029696dfff21919f97ac4c33cdd82162b5ab1555
2021-02-12gprs_ns2_vc_fsm: use CLOCK_MONOTONIC for alive elapsed timerAlexander Couzens1-6/+10
gettimeofday can jump and the comment says it should not be used for elapsed timer. Related: OS#4997 Change-Id: I41989d8f9f82f4d1f7b97f11577653699365c8ae
2021-02-12gprs_ns2: add signalling & data weights for UDP bindsAlexander Couzens8-4/+74
Allow to assign a signalling and data weight to UDP binds. Those weights will be used when doing dynamic configuration over IP-SNS. This is only the first part which only uses the assigned weights when doing a new SNS configuration. The outgoing change weight procedure will be supported in a later patch when the SNS fsm supports outgoing procedures. Related: SYS#5354 Change-Id: I5133e4229377d44772a9af28628a2bc420fea34b
2021-02-11ns2_fr: Fix heap-use-after-free in error recovery pathHarald Welte1-0/+1
<0026> gprs_ns2_fr.c:515 BIND(hdlcnet1) Can not create AF_PACKET socket. Are you root or have CAP_NET_RAW? ================================================================= ==3872359==ERROR: AddressSanitizer: heap-use-after-free on address 0x6130000030c0 at pc 0x7fef120aa92e bp 0x7ffebf6b5c20 sp 0x7ffebf6b5c18 READ of size 8 at 0x6130000030c0 thread T0 #0 0x7fef120aa92d in osmo_fr_link_free (/usr/local/lib/libosmogb.so.11+0x16992d) #1 0x7fef1205105a in free_bind (/usr/local/lib/libosmogb.so.11+0x11005a) Change-Id: I23c0f1697edd5734085fa18b0a2f253c0f206c53
2021-02-11ns2_fr: Fix null pointer deref in error pathHarald Welte1-1/+1
The followign happens if osmo-gbproxy is started without CAP_NET_RAW: <0026> gprs_ns2_fr.c:515 BIND(hdlcnet1) Can not create AF_PACKET socket. Are you root or have CAP_NET_RAW? gprs_ns2_fr.c:176:2: runtime error: member access within null pointer of type 'struct msgb' AddressSanitizer:DEADLYSIGNAL the second line is free_bind() iterating overr the backlog while destroying the not-yet-fully-initialized bind. Let's make sure the backlog llist_head is always initialized properly. Change-Id: I4d2fa50955c5897cd469fee68d4ddc65a9f5688f
2021-02-11README.md: Use https everywhereHarald Welte1-2/+2
Change-Id: I06d28ea1f5decffbd89f8439fae948e022bf3fe3
2021-02-10cosmetic: Move comment one line below in append_gprs_cell_optPau Espin Pedrol1-2/+1
Move it above the place where the bit is set, since the bit represents whether Extension Information is available, not whether R99 is available. Change-Id: Ice592acc50a24efd7fe4cf1a91f1d48fd74f38d8
2021-02-09gprs_ns2_vty: fix memory leak of vty_bindsAlexander Couzens1-0/+1
They never got freed, only removed from the vty_bind queue. Change-Id: I100897c32dc152f9acbb322782fae49b1f0bc030
2021-02-09gprs_ns2: rename vty-command ip-sns -> ip-sns-remoteAlexander Couzens2-7/+7
In prepration to introduce more commands e.g. ip-sns-bind rename the ip-sns-remote Related: SYS#5354 Change-Id: Ida979f3b9daa5f7280a629441e4006a7635653b0
2021-02-09gprs_ns2_sns: reset the N of timeout when entering a new stateAlexander Couzens1-0/+17
Otherwise retries are splitted between the states. Related: OS#5355 Change-Id: Iefde0c89965f0be899d6d1f096480f6fc79a92be
2021-02-09gprs_ns2_sns: add timeout to ST_CONFIG_SGSNAlexander Couzens1-3/+13
The state CONFIG_SGSN must be also protected by the timeout Tsns-prov. Related: OS#5355 Change-Id: I2700c1ad40ebe30658e9937d86a4861b0b59d6b6
2021-02-09gprs_ns2_sns: rework tracking of NS-VC unblocked/alive stateAlexander Couzens3-14/+90
The SNS must know when all NS-VC have failed. Further more there might be a corner case when the SNS configuration succeeds but no NS-VC comes up afterwards. Related: OS#5355 Change-Id: Ie72da9adeefe0c2850d49a9208b2d0a4556f9101
2021-02-08ns2: Don't try to add packets to the backlog on real errorsHarald Welte1-1/+5
When writing to the AF_PACKET socket, we have to distinguish the pseudo-errors like -ENOBUFS (where we do want to add to the backlog) from real errors like -ENETDOWN, -EMSGSIZE, ... where we don't want to add the failed packet to the backlog. Change-Id: Ibbb6805da0f118466c4c91e458e62b63b84cb794
2021-02-08ns2: improve backlog handling on interface up/downHarald Welte1-9/+35
This patch improves the behavior of the newly-added backlog in situations where the interface goes up/down. * don't add new packets to the backlog while if_running == false * flush the backlog on both ifup and ifdown events Change-Id: Ib35d099526544fe2cff64566fd56147a906adab9
2021-02-08ns2: Don't queue Q.933 LMI messages; only store most recent onesHarald Welte1-3/+18
There's not really any point in storing multiple LMI messages, and then transmitting them in inverse order, as the existing code does. Instead, we shall store only the last (failed) LMI message and try to transmit that at highest priority, before any NS messages in the actual queue. Change-Id: I5407a76a34d7e687966fe1a915febf3a87256593
2021-02-08ns2: Name NSVC FSM events consistentlyHarald Welte1-12/+12
Reading a log line like this: <0026> gprs_ns2_vc_fsm.c:808 GPRS-NS2-VC(FR-hdlcnet1-DLCI16-NSE02001-NSVC00001)[0x6120000024a0]{UNBLOCKED}: Received Event RESET is very ambiguous. Does it mean we received a NS-RESET message? Does it mean the FSM was instructed to send a NS-RESET? ... Let's make sure the human-readable names give a very clear indication of what exactly is happening. Change-Id: I8b7615b3eca04212831163ff0ea4aea35069cd0e
2021-02-08Fix struct bitfields on big endian systemsPau Espin Pedrol3-0/+88
Changes done by contrib/struct_endianess.py. Change-Id: Ia9cb1ef2ba2bfff9ef713c7d1cf388931dae1c46
2021-02-06tlv: clarify documentation for msgb_tv{16,32}_put()Vadim Yanitskiy1-2/+2
Change-Id: Ie439822e0587012e108f67ba4e73771dc684b95b
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