Hi,
The following patchset contains IPv6 GTP driver support for net-next,
this also includes IPv6 over IPv4 and vice-versa:
Patch #1 removes a unnecessary stack variable initialization in the
socket routine.
Patch #2 deals with GTP extension headers. This variable length extension
header to decapsulate packets accordingly. Otherwise, packets are
dropped when these extension headers are present which breaks
interoperation with other non-Linux based GTP implementations.
Patch #3 prepares for IPv6 support by moving IPv4 specific fields in PDP
context objects to a union.
Patch #4 adds IPv6 support while retaining backward compatibility.
Three new attributes allows to declare an IPv6 GTP tunnel
GTPA_FAMILY, GTPA_PEER_ADDR6 and GTPA_MS_ADDR6 as well as
IFLA_GTP_LOCAL6 to declare the IPv6 GTP UDP socket. Up to this
patch, only IPv6 outer in IPv6 inner is supported.
Patch #5 uses IPv6 address /64 prefix for UE/MS in the inner headers.
Unlike IPv4, which provides a 1:1 mapping between UE/MS,
IPv6 tunnel encapsulates traffic for /64 address as specified
by 3GPP TS. Patch has been split from Patch #4 to highlight
this behaviour.
Patch #6 passes up IPv6 link-local traffic, such as IPv6 SLAAC, for
handling to userspace so they are handled as control packets.
Patch #7 prepares to allow for GTP IPv4 over IPv6 and vice-versa by
moving IP specific debugging out of the function to build
IPv4 and IPv6 GTP packets.
Patch #8 generalizes TOS/DSCP handling following similar approach as
in the existing iptunnel infrastructure.
Patch #9 adds a helper function to build an IPv4 GTP packet in the outer
header.
Patch #10 adds a helper function to build an IPv6 GTP packet in the outer
header.
Patch #11 adds support for GTP IPv4-over-IPv6 and vice-versa.
Patch #12 allows to use the same TID/TEID (tunnel identifier) for inner
IPv4 and IPv6 packets for better UE/MS dual stack integration.
This series integrates with the osmocom.org project CI and TTCN-3 test
infrastructure (Oliver Smith) as well as the userspace libgtpnl library.
Thanks to Harald Welte, Oliver Smith and Pau Espin for reviewing and
providing feedback through the osmocom.org redmine platform to make this
happen.
Please, pull these changes from:
git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git tags/gtp-24-04-24
Thanks.
----------------------------------------------------------------
The following changes since commit 8d03c1534d4ae136fd2c9e27f026157cb244b212:
Merge branch 'selftests-drv-net-support-testing-with-a-remote-system' (2024-04-23 10:13:59 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git tags/gtp-24-04-24
for you to fetch changes up to 1c0b778c54746b870a5297339ca36a43ed8fc701:
gtp: identify tunnel via GTP device + GTP version + TEID + family (2024-04-23 23:44:37 +0200)
----------------------------------------------------------------
gtp pull request 24-04-24
----------------------------------------------------------------
Pablo Neira Ayuso (12):
gtp: remove useless initialization
gtp: properly parse extension headers
gtp: prepare for IPv6 support
gtp: add IPv6 support
gtp: use IPv6 address /64 prefix for UE/MS
gtp: pass up link local traffic to userspace socket
gtp: move debugging to skbuff build helper function
gtp: remove IPv4 and IPv6 header from context object
gtp: add helper function to build GTP packets from an IPv4 packet
gtp: add helper function to build GTP packets from an IPv6 packet
gtp: support for IPv4-in-IPv6-GTP and IPv6-in-IPv4-GTP
gtp: identify tunnel via GTP device + GTP version + TEID + family
drivers/net/gtp.c | 855 ++++++++++++++++++++++++++++++++++++-------
include/net/gtp.h | 5 +
include/uapi/linux/gtp.h | 3 +
include/uapi/linux/if_link.h | 2 +
4 files changed, 735 insertions(+), 130 deletions(-)
Hi, The following patchset contains IPv6 GTP driver support for net-next, this also includes IPv6 over IPv4 and vice-versa: Patch #1 removes a unnecessary stack variable initialization in the socket routine. Patch #2 deals with GTP extension headers. This variable length extension header to decapsulate packets accordingly. Otherwise, packets are dropped when these extension headers are present which breaks interoperation with other non-Linux based GTP implementations. Patch #3 prepares for IPv6 support by moving IPv4 specific fields in PDP context objects to a union. Patch #4 adds IPv6 support while retaining backward compatibility. Three new attributes allows to declare an IPv6 GTP tunnel GTPA_FAMILY, GTPA_PEER_ADDR6 and GTPA_MS_ADDR6 as well as IFLA_GTP_LOCAL6 to declare the IPv6 GTP UDP socket. Up to this patch, only IPv6 outer in IPv6 inner is supported. Patch #5 uses IPv6 address /64 prefix for UE/MS in the inner headers. Unlike IPv4, which provides a 1:1 mapping between UE/MS, IPv6 tunnel encapsulates traffic for /64 address as specified by 3GPP TS. Patch has been split from Patch #4 to highlight this behaviour. Patch #6 passes up IPv6 link-local traffic, such as IPv6 SLAAC, for handling to userspace so they are handled as control packets. Patch #7 prepares to allow for GTP IPv4 over IPv6 and vice-versa by moving IP specific debugging out of the function to build IPv4 and IPv6 GTP packets. Patch #8 generalizes TOS/DSCP handling following similar approach as in the existing iptunnel infrastructure. Patch #9 adds a helper function to build an IPv4 GTP packet in the outer header. Patch #10 adds a helper function to build an IPv6 GTP packet in the outer header. Patch #11 adds support for GTP IPv4-over-IPv6 and vice-versa. Patch #12 allows to use the same TID/TEID (tunnel identifier) for inner IPv4 and IPv6 packets for better UE/MS dual stack integration. This series integrates with the osmocom.org project CI and TTCN-3 test infrastructure (Oliver Smith) as well as the userspace libgtpnl library. Thanks to Harald Welte, Oliver Smith and Pau Espin for reviewing and providing feedback through the osmocom.org redmine platform to make this happen. Please, pull these changes from: git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git tags/gtp-24-04-24 Thanks. ---------------------------------------------------------------- The following changes since commit 8d03c1534d4ae136fd2c9e27f026157cb244b212: Merge branch 'selftests-drv-net-support-testing-with-a-remote-system' (2024-04-23 10:13:59 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/pablo/gtp.git tags/gtp-24-04-24 for you to fetch changes up to 1c0b778c54746b870a5297339ca36a43ed8fc701: gtp: identify tunnel via GTP device + GTP version + TEID + family (2024-04-23 23:44:37 +0200) ---------------------------------------------------------------- gtp pull request 24-04-24 ---------------------------------------------------------------- Pablo Neira Ayuso (12): gtp: remove useless initialization gtp: properly parse extension headers gtp: prepare for IPv6 support gtp: add IPv6 support gtp: use IPv6 address /64 prefix for UE/MS gtp: pass up link local traffic to userspace socket gtp: move debugging to skbuff build helper function gtp: remove IPv4 and IPv6 header from context object gtp: add helper function to build GTP packets from an IPv4 packet gtp: add helper function to build GTP packets from an IPv6 packet gtp: support for IPv4-in-IPv6-GTP and IPv6-in-IPv4-GTP gtp: identify tunnel via GTP device + GTP version + TEID + family drivers/net/gtp.c | 855 ++++++++++++++++++++++++++++++++++++------- include/net/gtp.h | 5 + include/uapi/linux/gtp.h | 3 + include/uapi/linux/if_link.h | 2 + 4 files changed, 735 insertions(+), 130 deletions(-)