Hi Stephen,
This patchset extends pedit to support modifying a field in an offset relative
to the conventional network headers (kenrel support was added [1] in 4.11 rc1).
Without the extended pedit, user could specify fields in TCP and ICMP headers,
but the kernel code was using an offset relative to the begining of the IP
header. This will break if IP header length is greater than the minimal value
of 20, or if L3 is not IPv4.
It also introduces support in manipulating ETH, TCP, UDP and IP.ttl fields and
a new command to increase/decrease the value of a field (current use case is
IP.ttl).
Since there might be deployments already using pedit, special consideration was
taken, not to break those scripts - only by specifying the special keyword
'ex', the extended capabilities are available, thus there should be no impact
on existing scripts.
Also, the new code can live together with rules added by the old code. It
supports both the old netlink and the new one.
This patchset is against the master and not net-next as the functionality was
added in 4.11
Thanks,
Amir
[1] - 71d0ed7079df ("net/act_pedit: Support using offset relative to the
conventional network headers")
Amir Vadai (7):
tc/pedit: Fix a typo in pedit usage message
tc/pedit: Extend pedit to specify offset relative to mac/transport
headers
tc/pedit: Introduce 'add' operation
tc/pedit: p_ip: introduce editing ttl header
tc/pedit: Support fields bigger than 32 bits
tc/pedit: p_eth: ETH header editor
tc/pedit: p_tcp: introduce pedit tcp support
Or Gerlitz (1):
tc/pedit: p_udp: introduce pedit udp support
man/man8/tc-pedit.8 | 126 +++++++++++++++++++++--
tc/Makefile | 1 +
tc/m_pedit.c | 290 ++++++++++++++++++++++++++++++++++++++++++++++------
tc/m_pedit.h | 44 ++++++--
tc/p_eth.c | 72 +++++++++++++
tc/p_icmp.c | 3 +-
tc/p_ip.c | 21 +++-
tc/p_tcp.c | 40 +++++++-
tc/p_udp.c | 30 +++++-
9 files changed, 572 insertions(+), 55 deletions(-)
create mode 100644 tc/p_eth.c
--
2.12.0
