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Date:   Tue, 24 Dec 2019 09:55:39 -0800
From:   Tom Herbert <>
Cc:     Tom Herbert <>
Subject: [PATCH v7 net-next 0/9] ipv6: Extension header infrastructure

This patchset improves the IPv6 extension header infrastructure
to make extension headers more usable and scalable.

  - Reorganize extension header files to separate out common
    API components
  - Create common TLV handler that will can be used in other use
    cases (e.g. segment routing TLVs, UDP options)
  - Allow registration of TLV handlers
  - Elaborate on the TLV tables to include more characteristics
  - Add a netlink interface to set TLV parameters (such as
    alignment requirements, authorization to send, etc.)
  - Enhance validation of TLVs being sent. Validation is strict
    (unless overridden by admin) following that sending clause
    of the robustness principle
  - Allow non-privileged users to set Hop-by-Hop and Destination
    Options if authorized by the admin

  - Fix build errors from missing include file.

  - Fix kbuild issue for ipv6_opt_hdr declared inside parameter list
    in ipeh.h

  - Resubmit

  - Fix reverse christmas tree issue

  - Address comments from Simon Horman
  - Remove new EXTHDRS Kconfig symbol, just use IPV6 for now
  - Split out introduction of parse_error for TLV parsing loop into its
    own patch
  - Fix drop counters in HBH and destination options processing
  - Add extack error messages in netlink code
  - Added range of permissions in include/uapi/linux/ipeh.h
  - Check that min data length is <= max data length when setting
    TLV attributes

  - Fix incorrect index in checking for nonzero padding
  - Use dev_net(skb->dev) in all cases of __IP6_INC_STATS for hopopts
    and destopts (addresses comment from Willem de Bruijin)

Tom Herbert (9):
  ipeh: Fix destopts counters on drop
  ipeh: Create exthdrs_options.c and ipeh.h
  ipeh: Move generic EH functions to exthdrs_common.c
  ipeh: Generic TLV parser
  ipeh: Add callback to ipeh_parse_tlv to handle errors
  ip6tlvs: Registration of TLV handlers and parameters
  ip6tlvs: Add TX parameters
  ip6tlvs: Add netlink interface
  ip6tlvs: Validation of TX Destination and Hop-by-Hop options

 include/net/ipeh.h         |  209 ++++++++
 include/net/ipv6.h         |   12 +-
 include/uapi/linux/in6.h   |    6 +
 include/uapi/linux/ipeh.h  |   53 ++
 net/dccp/ipv6.c            |    2 +-
 net/ipv6/Makefile          |    3 +-
 net/ipv6/calipso.c         |    6 +-
 net/ipv6/datagram.c        |   51 +-
 net/ipv6/exthdrs.c         |  514 ++-----------------
 net/ipv6/exthdrs_common.c  | 1216 ++++++++++++++++++++++++++++++++++++++++++++
 net/ipv6/exthdrs_options.c |  342 +++++++++++++
 net/ipv6/ipv6_sockglue.c   |   39 +-
 net/ipv6/raw.c             |    2 +-
 net/ipv6/tcp_ipv6.c        |    2 +-
 net/ipv6/udp.c             |    2 +-
 net/l2tp/l2tp_ip6.c        |    2 +-
 net/sctp/ipv6.c            |    2 +-
 17 files changed, 1942 insertions(+), 521 deletions(-)
 create mode 100644 include/net/ipeh.h
 create mode 100644 include/uapi/linux/ipeh.h
 create mode 100644 net/ipv6/exthdrs_common.c
 create mode 100644 net/ipv6/exthdrs_options.c


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