[PATCH v7 0/7] Add --dhcp-boot and --dhcp-opt options

[Anshu Kumari <anskuma@redhat.com>]

This series adds support for custom DHCP options in passt, enabling
network boot (PXE/UEFI HTTP Boot) and arbitrary DHCP option injection.

Two new command-line flags are introduced:

  --dhcp-boot URL    Sets the boot file URL (DHCP option 67 and the
                     legacy boot file field)

  --dhcp-opt CODE,VALUE
                     Sets any DHCP option by numeric code, with
                     type-aware parsing per RFC 2132

The DHCP reply path is extended with option overload support (RFC 2132
option 52), allowing options to overflow into the file and sname fields
when the standard options area is full.

RFC 3396 option splitting for concatenation-requiring options has also
been introduce as a separate patch.

Anshu Kumari (7):
  dhcp: Refactor fill_one() to operate on a generic buffer
  dhcp: Add option configuration tracking with enum opt_conf
  dhcp: Add --dhcp-opt with option table and value parser
  dhcp: Add --dhcp-boot command-line option
  dhcp: Change fill_one() to return void
  dhcp: Add option overload
  dhcp: Add RFC 3396 option splitting for concatenation-requiring
    options

 conf.c  |  32 ++-
 dhcp.c  | 617 ++++++++++++++++++++++++++++++++++++++++++++++++++------
 dhcp.h  |   2 +
 passt.1 |  48 +++++
 4 files changed, 632 insertions(+), 67 deletions(-)

-- 
2.55.0