[PATCH v4 0/4] Add support for ipv6 host forwarding

[Doug Evans via <qemu-devel@nongnu.org>]

This patchset takes the original patch from Maxim,
https://www.mail-archive.com/qemu-devel@nongnu.org/msg569573.html
and updates it.

Option hostfwd is extended to support ipv6 addresses.
Commands hostfwd_add, hostfwd_remove are extended as well.

The libslirp part of the patch has been committed upstream,
and is now in qemu. See patch 1/4.

Changes from v3:

1/4 slirp: Advance libslirp submodule to add ipv6 host-forward support

- pick up latest libslirp patch to reject ipv6 addr-any for guest address
  - libslirp currently only provides a stateless DHCPv6 server, which means
    it can't know in advance what the guest's IP address is, and thus
    cannot do the "addr-any -> guest ip address" translation that is done
    for ipv4

2/4 util/qemu-sockets.c: Split host:port parsing out of inet_parse

- this patch is new in v4
  - provides new utility: inet_parse_host_and_port, updates inet_parse
    to use it

3/4 net/slirp.c: Refactor address parsing

- this patch renamed from 2/3 to 3/4
- call inet_parse_host_and_port from util/qemu-sockets.c
- added tests/acceptance/hostfwd.py

4/4 net: Extend host forwarding to support IPv6

- this patch renamed from 3/3 to 4/4
- ipv6 support added to existing hostfwd option, commands
  - instead of creating new ipv6 option, commands
- added tests to tests/acceptance/hostfwd.py

Changes from v2:
- split out libslirp commit
- clarify spelling of ipv6 addresses in docs
- tighten parsing of ipv6 addresses

Change from v1:
- libslirp part is now upstream
- net/slirp.c changes split into two pieces (refactor, add ipv6)
- added docs

Doug Evans (4):
  slirp: Advance libslirp submodule to add ipv6 host-forward support
  util/qemu-sockets.c: Split host:port parsing out of inet_parse
  net/slirp.c: Refactor address parsing
  net: Extend host forwarding to support IPv6

 hmp-commands.hx             |  15 +++
 include/qemu/sockets.h      |   3 +
 net/slirp.c                 | 194 ++++++++++++++++++++++++------------
 slirp                       |   2 +-
 tests/acceptance/hostfwd.py | 150 ++++++++++++++++++++++++++++
 util/qemu-sockets.c         |  94 ++++++++++++-----
 6 files changed, 370 insertions(+), 88 deletions(-)
 create mode 100644 tests/acceptance/hostfwd.py

-- 
2.30.0.617.g56c4b15f3c-goog