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2017-10-17ippool: Implement and use blacklist instead of blindly using IPPOOL_NOGATEWAYPau Espin Pedrol1-2/+52
Commit dda21ed7d4a897c9284c69175d0da598598eae40 modified previous calls to ippool_new() removing the pass of flags to avoid allocating certain problematic IPs from the pool to MS, such as the network, gateway and broadcast IPs. Today I did some unsucessful tests with osmo-ggsn with a pool "ip prefix dynamic 176.16.222.0/24", and thus IP 176.16.222.0 was being assigned to the MS. De-capsulated DNS packets were received in the tun interface, but the Linux system in there was unable to correctly forward the packets to the gateway interface connected to the Internet. However, adding a second MS which got 176.16.222.1 had its packets forwarded correctly. However, previous implementation relies on flag IPPOOL_NOGATEWAY flag to blindly blacklist first IP after the network ip (ie, .0 and .1 are removed), which limits the IP reserved for the tun device to be .1. If a different IP in the range is assigned, it may cause issues. As a result, a blacklist is introduced in this commit to dynamically fetch the tun IP address and exlucde it from the pool of available IPs. Change-Id: I8e91f7280d60490c858a769dd578c1c8e54e9243
2017-10-16tun: Convert tun_ipv6_linklocal_get to be more genericPau Espin Pedrol1-1/+3
Add support for IPv4 and IPv6 global IPs. Also return the prefix length of the IP address by using a in46_prefix. Change-Id: I277af191dc611b6bbcb83479f4ae338083740322
2017-10-14ggsn: Avoid crash on wrong EUA typeHarald Welte1-0/+28
If the EUA in the Create PDP Context Request was not supported by the given APN (e.g. IPv6 request for a v4-only APN), we crashed. Avoid this and add proper handling of this error case. Change-Id: I8d1f7ec727c5d2d4427232015f81ed57d3440dff
2017-10-13Remove trailing whitespacePau Espin Pedrol1-3/+3
Change-Id: I8e24f95a88bef3a59006a89c219871e6156963d7
2017-10-11create_context_ind(): Fix crash on apn not foundPau Espin Pedrol1-2/+2
Program terminated with signal SIGSEGV, Segmentation fault. 0 create_context_ind (pdp=0xb6b391b0 <pdpa>) at /usr/src/debug/osmo-ggsn/1.0.0+gitrAUTOINC+ab5e160937-r0/git/ggsn/ggsn.c:453 453 if (!apn->started) (gdb) bt 0 create_context_ind (pdp=0xb6b391b0 <pdpa>) at /usr/src/debug/osmo-ggsn/1.0.0+gitrAUTOINC+ab5e160937-r0/git/ggsn/ggsn.c:453 1 0xb6b225e0 in gtp_create_pdp_ind (gsn=gsn@entry=0x74f28, version=version@entry=1, peer=0x0, peer@entry=0xbee6ead4, fd=-1092167056, fd@entry=8, pack=pack@entry=0xbee6eae4, len=len@entry=179) at /usr/src/debug/osmo-ggsn/1.0.0+gitrAUTOINC+ab5e160937-r0/git/gtp/gtp.c:1591 2 0xb6b245e4 in gtp_decaps1c (gsn=0x74f28) at /usr/src/debug/osmo-ggsn/1.0.0+gitrAUTOINC+ab5e160937-r0/git/gtp/gtp.c:2986 3 0x41d770c0 in osmo_select_main () from /usr/lib/libosmocore.so.8 4 0x000121b8 in main (argc=4, argv=0xbee70e54) at /usr/src/debug/osmo-ggsn/1.0.0+gitrAUTOINC+ab5e160937-r0/git/ggsn/ggsn.c:897 Fixes: dd266066c7cc96c797034da352cc9d72177c5780, b16c46b4c36383368eb1581e40d0a8ca751ddc53 Change-Id: Ie4ec74e87aaf1d067dd1717d986673be56c4d6ed
2017-10-01create_context_ind(): ignore a non-started default APNHarald Welte1-0/+5
If the default APN has not been started, it is not eligible to be used in starting of new PDP contexts. Change-Id: I93b5c205c033f275824ee8bc8cdcf1428fb086df
2017-10-01apn_start(): Extend error message when setting IPv6 address failsHarald Welte1-1/+2
Tell the user about possible causes of failure to set the IPv6 address of the tun device, such as general lack of IPv6 support in the kernel/OS, or the use of /proc/sys/net/ipv6/conf/default/disable_ipv6 Change-Id: I5ff812425ee12b8386bb66521e05c93e825a4506
2017-10-01apn_stop(): Print tun device name when closing tun deviceHarald Welte1-1/+1
Change-Id: If981cc0696122cb69c01ceac6f54ae01bcbf4a2d
2017-10-01create_context_ind(): ignore any non-started APNsHarald Welte1-0/+3
If we receive a GTP-C CREATE PDP CONTEXT for an APN that we were unable (or not configured) to start, ignore that APN. Change-Id: I8011a9ccc1d5effd3779f184c9055af46838ccaf
2017-10-01apn_start(): fix clean-up after errors bringing up APNHarald Welte1-3/+0
When there's an interim error (e.g. in resolving the link-local address or setting up the tun device), apn_start() simply calls apn_stop() on the not-yet-fully-started apn_ctx. This only works if apn_stop() doesn't bail out early in case of a not-started apn_ctx, so let's remove the related check at the start of the function. Change-Id: I2917a6258cb73cc12fd9d81296ff0eaa616890b9
2017-09-25Move extended PDP logging macro to headerMax1-2/+1
It might be useful for any user of libgtp who uses libosmocore so let's make generalized version of it available as part of installable header. Change-Id: I79aba10ef989384a28f059c30899e65c771ae5e1 Related: SYS#3610
2017-09-24ggsn: Add per-APN VTY configuration option on G-PDU sequence numbersHarald Welte3-0/+31
This per-APN vty option determines if we are transmitting GTP sequence numbers in downlink G-PDU messages. This behavior is optional as per GTP spec. The default behavior is "true", like before this change. Related: OS#2519 Change-Id: Ibf0de261f83951309b01b4feae998b6656c77664
2017-09-24ggsn: Fix double whitespace in writing "ifconfig" linesHarald Welte1-2/+2
This is merely a cosmetic issue, no functional change. Change-Id: I8663ee633524eedeed5ddd45ddb65a06825052ac
2017-09-24ggsn: Fix config file writing of IPv6 DNS settingsHarald Welte1-1/+1
There was a copy+paste mistake that created syntax errors during the write of a config file that contained IPv6 DNS server settings. Change-Id: Ida40c32c72dba8155f8294b93484e46e8bd27739
2017-09-24ICMPv6: Send router advertisement from own link-local addressHarald Welte4-10/+25
I'm not quite sure how I ended up doing this, but for some strange reason the code before this commit is sending the ICMPv6 Router Advertisements from some weird non-standard source address. This is a violation of RFC4861 which clearly states that the source address of router advertisements "MUST be the link-local address assigned to the interface from which this message is sent." Change-Id: Ib444af70fc8f0b433d371281601fd5a37b29039e
2017-09-06ggsn: Add ability to specify local IP addresses for GTP-C and GTP-UHarald Welte3-4/+50
In case the GGSN is behind some kind of DNAT, the public GTP-C and GTP-U IP addresses as exposed inside the GTP payload information elements are different from the (internal, behind-nat) IP address to which it listens/binds. Change-Id: I548c9011c9abd66d46f963b1def61575f3dabb89
2017-09-06Rename OpenGGSN to OsmoGGSNHarald Welte3-10/+10
Osmocom has maintained this program since about 7 years now, while the original author / copyright holder has completely disappeared. With the introduction of Osmocom-style CTRL and VTY interfaces, the way how the program is used and configured has substantially changed. In order to avoid confusion in terms of configuration file format etc, let's rename it to OsmoGGSN. Change-Id: I2da30f7d4828e185bfac1a4e2d8414b01cbe4f9d
2017-09-06ggsn: Handle SIGTERM like SIGINT and terminateHarald Welte1-1/+3
Change-Id: I0c8773bd6ef41332b91b5b025aef9ef129af8289
2017-09-06Introduce a VTY, factually turning OpenGGSN into an Osmocom programHarald Welte7-1958/+1562
Change-Id: I9613ca3436e77ea132c47f0096df7c5050d7e826
2017-09-05libgtp: Remove ctrl_handle from gsn_t, replace with private contextHarald Welte1-3/+3
The control interface handle never belonged into libgtp in the first place. Commit 727417dd28813c697b4820aef9f54f249e30c4b8 should not have added this to the shared library (used by sgsnemu, osmo-sgsn, ...), but to some private state of the GGSN. Introducing a private context pointer at the same location will keep ABI compatibilty. Change-Id: I4f17516dae3e04114564828a3e5f6e2ea54212a5
2017-09-05lib/ippool: Move ippool_aton() out of ippool_new()Harald Welte1-10/+11
we rather pass the in46_prefix directly into ippool_new() Change-Id: Iadf6274e881a9bfc75eb41f9380f5ae2d8c92a0f
2017-09-05gtp-kernel: Remove dependency to cmdline.[ch]Harald Welte3-21/+14
Change-Id: I760f25df609c309eba4d5716f3e23b49320449bf
2017-08-30ggsn: Fix DNS not sent in PDP context responsePau Espin Pedrol1-2/+2
During IPv6 support implementation, helper function pco_contains_proto was added which contains an error: It is only capable of finding first protocol correctly, and as a consequence, in my setup DNS servers where not sent back to the SGSN/MS, resulting in phone being able to connect to IPs but not to domain names which required DNS resolution. The condition in the while loop is also changed to match the increment of the variable inside the loop to make it easier to understand at first glance. Fixes: 1ae98777d9b1ee62e6900caf4bb580d1a42bb416 Change-Id: Icc2e6716c33d78d3c3e000f529806228d8aa155e
2017-08-12Properly format IMSI before using it in trapHarald Welte1-1/+1
For some reason Max' commits introducing the CTRL/trap interface about one year ago didn't convert the IMSI to its actual textual representation before usign it in the CTRL interface. Let's clean that up by properly interpreting the IMSI. Change-Id: I8b20d2e47a29de266d93a7ddd5e6877f7e346a63
2017-08-11Support setting TUN device IPv6 address + prefixHarald Welte1-8/+8
As we can now have PDP contexts with IPv6 user IP payload, it is useful to extend the TUN related code to be able to configure the tun device IPv6 address + prefix length Change-Id: I899d21e52d02e0b8384af29ddd489ff19c8f2cf6
2017-08-11IPv6: Support PCO for IPv6 DNS addressesHarald Welte1-41/+136
In IPv6, DNS server information is not passed along as IPCP6 like in IPv5 with IPCP. The reason is that IPCP6 (for PPP) doesn't support passing DNS server information. Rather, the relevant RFCs indicate DHCPv6 should be used even over point-to-point links. 3GPP decided to avoid DHCPv6 dependency for stateless autoconfiguration (the only mandatory IPv6 configuration mechanism) and added some new non-PPP-style PCO information elements ("containers") which can among other things inform a MS about IPV6 DNS servers. That same mechanism can also be used to inform the MS about IPv4 DNS servers, so for IPv4 there are now two competing mechanisms: IPCP and the new "native" PCO container. With this patch, we support both for IPv4. Change-Id: I21499afd61def8c925f7838bde76f34d28214b56
2017-08-11IPv6: Implement IPv6 prefix assignment via ICMPv6 router advertisementHarald Welte6-2/+504
The 3GPP specs are quite strange when it comes to how an IPv6 address or rather prefix is assigned to an IPv6 PDP context. The designated method for allocating the IPv6 address via the PDP EUA (End User Address) Information Element in the GTP signalling plane is *not* used to allocate the address/prefix. Instead, the EUA is used to allocate an "interface identifier" to the MS, which it the uses to derive its link-local source address to send a router solicitation. The GGSN subsequently answers witha router advertisement, advertising a single/64 prefix, whihcthe MS then uses to generate it's real IPv6 source address for subsequent communication. Change-Id: Icddf7d30e01d76a4784bcef5787b36f52f703a9f
2017-08-09ippool: Extend pool to work with /64 prefixesHarald Welte1-1/+5
In IPv6 GPRS, we actually don't want to allocate an individual v6 address (like in IPv4), but we want to allocate a prefix. The standard prefix lengh is 8 bytes, i.e. a /64 prefix. This patch extends the pool to be able to work with such v6 prefixes. Change-Id: I0cf700b6baf195a2e5fbea000531f801acaaa443
2017-08-09ggsn: Send proper errors in create_context_ind()Harald Welte1-3/+11
When we receive PDP context requests for unknown PDP types or if we run out of dynamic addresses, we need to inform the SGSN that PDP context creation failed. Change-Id: Ibf199c1726130d27c8f80230b30ee51101c93b06
2017-08-09IPv6 support for user IPHarald Welte1-3/+8
This patch enables the use of IPv6 PDP contexts. The phone will have to request an IPv6 End-user-Address, and the GGSN will have to be configured for an IPv6 pool. The outer transport-layer IP between SGSN and GGSN must still be IPv4, it is not modified by this patch Change-Id: I22c3bf32a98e5daf99d6eaeac8c9f95cc7574774
2017-08-09lib/tun.h: Remove non-endian-safe redefinition of IP headerHarald Welte1-3/+5
We can simply use 'struct iphdr' from netinet/ip.h to achieve the same goal (and be portable). Change-Id: Ieece22e127dc14a7ffdc3b05656628989ad00b32
2017-08-09ippool: Add IPv6 support to IP pool implementationHarald Welte3-26/+30
Extend the IP pool implementation to be able to manage both pools of 32bit addresses (IPv4) as well as pools of 128bit addresses (IPv6) Change-Id: Ib98cc4bf634d6be9a7bf8c03a24e629455fcafc8
2017-08-04Proper fix for "Force Dynamic IP" in Create PDP CTXHarald Welte1-1/+3
An EUA length of *2* octets indicates dynamic IP address, while an EUA length of 0 is invalid. Let's fix this hack (which needs to finally be removed anyway). Change-Id: Ib1b57eb0654327882044d6862d955f4b32aa6bcd
2017-05-16ctrl: cleanup trap creationMax1-11/+16
Move common trap create/send code into separate function. Change-Id: Iaadc921b951aeb9b3ad5ab796e13d52017139468
2017-02-23gtp-kernel: Fix tunnel creation/removal for GTP Version 1Harald Welte1-2/+5
When Linux Kernel GTP-U support is enabled, OpenGGSN so far only worked with GTPv0,but not with GTPv1, as the TEI values were not correctly configured. This patch fixes the initialzation of the local and remote TEI before using libgtpnl to create a tunnel context in the kernel. Change-Id: I3e953ff5b4ab44c26dbbe20d18b61038fa57ff32
2016-11-02Only send TRAP for defined PDP peerMax1-6/+8
Do not attempt to send TRAP message on PDP context deletion if peer is unknown. Change-Id: I5e02c1d42bb7aaf1ef81a9824aab7b12047cdd3e Fixes: Coverity CID 150135
2016-10-12Add control interfaceMax2-4/+30
Only generation of TRAP messages over Control Interface is supported so far. Note: requires corresponding version of libosmoctrl. Change-Id: Ia76f841d2c9cd14394e9316fcd39f4060e23c898 Related: OS#1646
2016-10-11Remove unused functionMax1-1/+0
Change-Id: Iff0f1499660b12a47277b16a435efecb42fab038
2016-05-12ggsn: fix compilation error with --disable-gtp-kernelPablo Neira Ayuso1-1/+1
gtp-kernel.h: In function ‘gtp_kernel_init’: gtp-kernel.h:25:15: error: ‘struct gengetopt_args_info’ has no member named ‘gtpnl_given’ if (args_info->gtpnl_given) { ^ Makefile:422: recipe for target 'ggsn Reported-by: Holger Freyther <holger@freyther.de>
2016-05-10ggsn: cmdline: no need to specify interface anymorePablo Neira Ayuso5-34/+35
--gtpnl is now gone, instead you have --gtpkernel that behaves as an on/off toggle. We full rely on the kernel routing base to select the real device to transmit. I have updated ggsn/cmdline.ggo and then run 'gengetopt' to refresh the automatic code generation for command line options that openggsn uses.
2016-05-10ggsn: gtp-kernel: adapt gtp_dev_create() to its new interfacePablo Neira Ayuso1-2/+1
Andreas modified this interface, so update so this compiles again.
2015-12-21ggsn: update gpt-kernel logging to libosmocoreAndreas Schultz3-14/+11
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
2015-12-21ggsn: add support for GTP kernel data encapsulationPablo Neira Ayuso7-18/+369
This patch adds the -g, --gtpnl=device option that allows you to enable the GTP kernel tunneling mode in openggsn. You have to specify the real downlink device that will be used to tunnel traffic, eg. -g=eth0 This means that the gtp0 device will be created and it will use eth0 as the real device to encapsulate packet coming from the Internet that are addressed to the MS (so the tunnel devuce encapsulates these IP packets in GTP packets when traveling to the SGSN). Alternatively, you can also add this to the ggsn.conf configuration file: gtpnl eth0 The device has to be the real device that can route packets to the SGSN, if you select the wrong device, the kernel routing code may not find a way to reach the SSGN, you've been warned. Therefore, if this option is set, the operational becomes the following: 1) A gtp0 device is created via rtnetlink and configure the socket encapsulation infrastructure in the kernel. 2) Whenever a PDP context is created, this adds the necessary tunnel configuration via genetlink GTP interface. 3) Whenever a PDP context is destroyed, this deletes the tunnel via genetlink GTP interface. 4) Destroy the gtp0 device if ggsn is stopped, including all of the existing tunnels. You require the osmo-ggsn.git tree, which contains the kernel module gtp.ko and the libgtpnl library that you have to compile and install. Make sure you have loaded the gtp.ko kernel module before launching the ggsn daemon using the kernel driver mode, otherwise you will get a nice "operation not supported" error message ;-). This patch also adds supports for "ipup" configuration option to invoke an external script after the gtp0 device has been brought up. Typical command to add the route to reach the MS behind the GGSN is required, eg. ip route add 10.0.0.0/8 dev gtp0. The (horrible) ggsn parser has been manually extended to support the new configuration option. That code doesn't look nice, but it just mimics what we already have there for consistency, please don't blame me for that. If you want to run in debugging mode, I suggest you to use: sudo ggsn -c ggsn.conf -f -d Note that you do have to run openggsn as root to bring up the gtp0 device. You have to see this message that announce that the GTP kernel mode is enabled. openggsn[1106]: ggsn.c: 656: Using the GTP kernel mode (genl ID is 25) This patch also automagically sets up route to reach MS from Internet just like tun mode does. This is fundamental to get this working, better don't leave to the admin, he may forget to add this route. In this patch, I tried to encapsulate this new feature as much as possible as Harald initially suggested. To compile this feature, you have to pass --enable-gtp-kernel, ie. ./configire --enable-gtp-kernel Otherwise, the code to interact with the gtp kernel part is not compiled. Signed-off-by: Andreas Schultz <aschultz@tpip.net>
2014-12-04ggsn: Move printf to DEBUGP statements in the ggsn as wellHolger Hans Peter Freyther1-25/+11
The specific log statements are not great yet but at least they will end up in the log file. In the future everything should be related to the IMSI or at least the tunnel id.
2014-12-04ggsn: Remove unused dump/logging methodHolger Hans Peter Freyther1-15/+0
2014-12-04ggsn: Be able to set the log level for the text fileHolger Hans Peter Freyther4-1/+43
Fixes: SYS#599
2014-12-04logging: Switch to using libosmocore logging for all the codeHolger Hans Peter Freyther2-42/+37
2014-03-23cli: Introduce a logfile command to log errors to a fileHolger Hans Peter Freyther4-1/+41
The evolution would be to introduce libosmocore and start using the logging framework. But even then we can map this option to the file target. Fixes: SYS#263
2014-03-23cli: Manually patch the generated code to fix compiler warningHolger Hans Peter Freyther1-2/+0
cmdline.c: In function ‘cmdline_parser_internal’: cmdline.c:588:7: warning: variable ‘check_required’ set but not used [-Wunused-but-set-variable] int check_required; ^
2014-03-23cli: Re-generate the cmdline.c/cmdline.h with newer gengetoptHolger Hans Peter Freyther2-1124/+1228
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 21:13:45 +0000