Commit Graph

33 Commits

Author SHA1 Message Date
Oliver Smith c95db93512 tools/gtp-tunnel: pass rc of gtp_del_tunnel
Don't exit with 0 if gtp_del_tunnel fails.

Change-Id: I8046a57a5831e6bdee2ac37415380ce391c79c22
2024-02-21 10:28:31 +01:00
Oliver Smith 7928152581 gtp-link: close sockets on error
Avoid resource leaks.

Fixes: CID#347578, CID#347579
Change-Id: I9c437de9712ebe568528b4c9ee1e89a4ba5cd5d1
2024-02-19 12:18:28 +01:00
Pablo Neira Ayuso d489488a70 gtp-link: allow to specify listener address
gtp-link add <device> <family> [--sgsn] [<address>]

Allow to specify listener address, if not specified use ANY_ADDRESS.

Change-Id: I7a9b64393fd68d58c2c158c0e85c0470be007f63
2024-02-16 16:08:19 +01:00
Pablo Neira Ayuso 791a620e4d gtp-tunnel: display i_tei in help
display <tid|i_tei> in help message that is printed.

Change-Id: I0aa78e654f23a2b6588ac8e1e5508e798caad1a7
2024-02-15 15:42:02 +01:00
Pablo Neira Ayuso 43b88cadbf gtp: add flags to gtp_tunnel object
Flags tells us what fields have been set in this object.

This is required by

	./gtp-tunnel del

otherwise, build helper function adds the MS/UE address and kernel reports
ENOENT, and tunnel identifier is ignored.

Update gtp-tunnel tool to set flowid to zero in the GTP version 0 case,
otherwise kernel reports EINVAL since now this flag is not ever set.

Change-Id: I66677ab2d4de2c459ed9987c465fce6f059d6d93
2024-02-15 15:42:02 +01:00
Pablo Neira Ayuso 67e1fef97d gtp: provide interface to set family
Kernel now supports for TID/I_TEI to be used in both IPv4 and IPv6 GTP
tunnels. This improves dualstack support for MS/UE so GTP traffic can
be identified with the same tunnel identifier.

Update gtp-tunnel to specify the family, since a tunnel is now
identified by the following tuple [ version, identifier, family ].

Change-Id: I584d3997ffb89cd430dfda9615a4ce0ce517ab2a
2024-02-15 15:42:02 +01:00
Pablo Neira Ayuso 9911f6bfeb gtp-link: set IPv6 socket only
GTP driver bails out for IPv4-mapped-IPv6 socket with EADDRNOAVAIL,
to prevent issues with setsockopt IPV6_ADDRFORM.

GTP control plane checks that tunnel family matches the socket family
for this GTP device, ie. there is a 1:1 mapping between the socket
listener and the device which determines the supported IP tunnel header.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Change-Id: I887a107657059adeb14ae425576ae7ea9018f762
2024-02-15 15:41:42 +01:00
Pablo Neira Ayuso 38b5e239d6 gtp-link: add IPv6 support
Update tool to allow to specify family that is used for the outer network
header in GTP tunnels.

./gtp-link add gtp0 ip 			# IPv4 GGSN
./gtp-link add gtp0 ip --sgsn		# IPv4 SGSN
./gtp-link add gtp0 ip6 		# IPv6 GGSN
./gtp-link add gtp0 ip6 --sgsn		# IPv6 SGSN

Change-Id: I201c32a1bf9a2ab7a228287590bc7ec19c4997b9
2024-02-15 15:14:08 +01:00
Oliver Smith f3253354e3 tools/gtp-tunnel: pass rc of gtp_add_tunnel
Don't exit with 0 if gtp_add_tunnel fails.

Change-Id: If11b1fb4487a96dcb7f24d95794fea4e36202203
2024-02-14 16:18:52 +01:00
Oliver Smith a295615229 Add IPv6 support
Implement IPv6 in libgtpnl and the gtp-tunnel testing tool. Allow to
combine:

- GTPA_MS_ADDRESS and GTPA_PEER_ADDR6
- GTPA_MS_ADDR6 and GTPA_PEER_ADDRESS

to specify IPv4-in-IPv6-GTP and IPv6-in-IPv4-GTP in the tunnel
declaration from control plane.

This patch is based on multiple patches from Pablo in OS#6123. I decided
to squash them to directly implement v4-in-v6 and vice versa, instead of
implementing another variant first and then changing it again.

Co-developed-by: Pablo Neira Ayuso <pablo@netfilter.org>
Related: OS#6096
Change-Id: If864c9170f74af52a95cbc4cdb1b866e0309306b
2023-10-24 13:54:09 +02:00
Neels Hofmeyr 50ae7eafd2 fix memleak on del_tunnel() failure
Related: CID#307542
Change-Id: Ie29840a7518435447acf48f12e81fc520308a265
2023-02-03 01:05:01 +01:00
Oliver Smith 6954da78fb tools/gtp-link: add --sgsn to usage
Change-Id: I995754812b8418757a8df9ab2a3c208d61f16a8c
2022-09-07 15:48:16 +02:00
Oliver Smith 25d92af06a tools/gtp-tunnel: fix del usage
Change-Id: Iba5afd0cdb1588def3d865900ae02773dfd654e2
2022-09-07 15:43:27 +02:00
Gabriel Ganne 465b76dfca install gtp-tunnel and gtp-link tools
This eases quick setup for demonstration purposes.

Change-Id: I674c463989bc1529bfe132b7ec0df7a0052169df
2021-02-12 09:36:52 +01:00
Harald Welte cbcc25b2f0 Makefile: Build gtp-{link,tunnel} by default, but don't install them
They used to be in check_programs, but then this would only build them
during 'make check' which not everyone knows or is using.

Change-Id: Idd2b3a66e5968686e6bbff59dbc89b7673def8dd
Inspired-by: Thomas Boros <tomas.boros92@gmail.com>
2018-02-16 08:21:19 +01:00
Harald Welte 3bf55c32be Add support for SGSN role via IFLA_GTP_ROLE
This patch corresponds to a Linux kernel patch extending the kernel GTP
to also cover the SGSN role, not just the GGSN role.  In order to keep
the API/behavior compatible, gtp_dev_create() will continue to create
GGSN-side tunnels, while a new gtp_dev_create_sgsn() is introduced to
create SGSN-side tunnels.

Signed-off-by: Harald Welte <laforge@gnumonks.org>
2017-03-24 15:39:17 +01:00
Harald Welte a7a4df366b gtl-link.c: Actually use libgtpnl, don't hand-coded netlink msg
The command line tool should use libgtpnl, rather than replicating code
for generating a netlink message.
2017-03-24 15:39:17 +01:00
Pablo Neira Ayuso 50826a5667 tools: gtp-link: bind to GTP UDP sockets
So we can fully test packet decapsulation without a full blown openggsn
setup by injecting packets and using this simple tool.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:19:49 +02:00
Pablo Neira Ayuso 7b30c5526a tools: silence compilation warnings
CC       gtp-link.o
gtp-link.c: In function ‘main’:
gtp-link.c:48:40: warning: unused variable ‘flags’ [-Wunused-variable]
  unsigned int seq, portid, change = 0, flags = 0;
                                        ^
gtp-link.c:48:28: warning: unused variable ‘change’ [-Wunused-variable]
  unsigned int seq, portid, change = 0, flags = 0;
                            ^
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:16:59 +02:00
Pablo Neira Ayuso 18c9c768f1 tools: gtp-link: rename file now that we support deletion command
Better name for what this simple tool does.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:16:59 +02:00
Pablo Neira Ayuso 448bce4ace tools: gtp-link: allow to delete links
Add delete command, useful for testing.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:16:59 +02:00
Pablo Neira Ayuso 517be89706 tools: gtp-tunnel: restore option parsing
Andreas accidentally broke parsing, restore it.

Fixes: ba77a20 ("gtp-rtnl: Split TID handling for GTPv0 and GTPv1")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:16:59 +02:00
Pablo Neira Ayuso 9438f72cc4 tools: gtp-tunnel: simplify this by using gtp_list_tunnel()
gtp_list_tunnel() is exported through the library, so use it instead of
opencode. This is a left-over from the early stage of development of
libgtpnl.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:07:29 +02:00
Pablo Neira Ayuso 6ae67dfe2c tools: gtp-tunnel: fix wrong MS address
This displays the SGSN address where we should show the MS address
instead.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:05:23 +02:00
Pablo Neira Ayuso b9f6ffea9c include: refresh linux header copies in the tree
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-10 18:03:25 +02:00
Andreas Schultz 17c816ff84 gtp-rtnl: Split TID handling for GTPv0 and GTPv1
GTPv1 tunnel use separate 32bit Tunnel Endpoint Identifier's for each
direction while GTPv0 uses only one 64bit Tunnel IDentifier.

Signed-off-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-08 18:33:48 +02:00
Andreas Schultz af422a432c gtp-rtnl: real_ifname is not long needed, remove it
Signed-off-by: Andreas Schultz <aschultz@tpip.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-05-08 18:33:45 +02:00
Harald Welte 51b00a6c6c Add copright headers and license files, list Pablo as author
The kernel module still only listed me as author, even though Pablo
was doing most of the work on it after my initial incomplete version.
2014-04-03 09:37:38 -04:00
Pablo Neira Ayuso b0d712b055 libgtpnl: tools: gtp-tunnel: display teid in hexadecimal
So it is displayed like in wireshark.
2014-03-20 12:56:31 +01:00
Pablo Neira Ayuso 3a7dd0a215 libgtpnl: tools: fix compilation of gtp-link-add
A typo slipped through into that file and it stopped compiling.
2014-03-18 18:30:05 +01:00
Pablo Neira Ayuso 7aa2087885 allow to specify the interface name for the GTP device
We can use this to specify 'gtp0' from openggsn, so we make sure that
it always uses the same tunnel device on creation. If it already exists,
it will return EEXIST. This is used to skip the problem of lacking
NLM_F_ECHO in the rtnetlink link interface that allows us to know the
name of the gtp device that has been dynamically allocated from the
kernel.

And, finally, I don't find any use case for having more than one tunnel
device when integrating this with openggsn.

This patch also adjusts tools/gtp-link-add.c which needs some care, since
it is not yet using any of the library functions. This tools are likely
to be useful for troubleshooting and debugging.
2014-02-24 11:41:51 +01:00
Pablo Neira Ayuso f8ca765f8b tools: gtp-tunnel: fix accidentally swapped ms_addr and sgsn_addr
The output was swapping the ms and the sgsn addresses.
2014-02-22 22:38:05 +01:00
Pablo Neira Ayuso 14506665d9 add libgtpnl
This patch adds the libgtpnl library. Harald mentioned that he wanted
that the specific code that is added is well encapsulated, so let's
start a small library to interact with the GTP kernel module via netlink
interface.

This was done a bit while in the rush, so the interfaces are not nice
at all and the tools need to be ported on top of this library.

This library will be used to integrate openggsn with the GTP kernel
module.
2014-02-20 19:41:29 +01:00