[PATCH v4 0/4] 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.

v4:
   Restructured series from 6 patches to 4:
  - 1/4 refactor fill_one()
  - 2/4 option overload
  - 3/4 --dhcp-opt with parser and man page
  - 4/4 --dhcp-boot with man page

Anshu Kumari (4):
  dhcp: Refactor fill_one() to operate on a generic buffer
  dhcp: Add option overload
  dhcp: Add --dhcp-opt with option table and value parser
  conf: Add --dhcp-boot command-line option

 conf.c  |  50 ++++++++-
 dhcp.c  | 321 ++++++++++++++++++++++++++++++++++++++++++++++++++++----
 dhcp.h  |   2 +
 passt.1 |  49 +++++++++
 passt.h |   6 ++
 5 files changed, 407 insertions(+), 21 deletions(-)

-- 
2.54.0