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[v6,net-next,0/9] ipv6: Extension header infrastructure

Message ID 1576885124-14576-1-git-send-email-tom@herbertland.com
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Series ipv6: Extension header infrastructure | expand

Message

Tom Herbert Dec. 20, 2019, 11:38 p.m. UTC 
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 the sending clause
    of the robustness principle
  - Allow non-privileged users to set Hop-by-Hop and Destination
    Options if authorized by the admin

v2:
  - Fix build errors from missing include file.

v3:
  - Fix kbuild issue for ipv6_opt_hdr declared inside parameter list
    in ipeh.h

v4:
  - Resubmit

v5:
  - Fix reverse christmas tree issue

v6:
  - 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

Tom Herbert (9):
  ipeh: Fix destopts and hopopts 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         |  504 ++----------------
 net/ipv6/exthdrs_common.c  | 1212 ++++++++++++++++++++++++++++++++++++++++++++
 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, 1938 insertions(+), 511 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