[PATCH 00/18] Rework forwarding option parsing

David Gibson
2026-04-07T03:16:36Z

This series makes a number of significant reworks to how we process
forwarding options (-t, -u, -T and -U) in passt & pasta. This is
largely motivated by moving towards being able to share this code with
a configuration update tool. However, along the way it also enables
some forwarding configurations that were technically possible with the
forwarding table but couldn't be specified on the command line, in
particular bug 180.

There is still a bunch of work needed to make the parsing code truly
shareable with pesto, but this is a solid start.

David Gibson (18):
conf: Split parsing of port specifiers from the rest of -[tuTU]
parsing
conf: Simplify handling of default forwarding mode
conf: Move first pass handling of -[TU] next to handling of -[tu]
doc: Consolidate -[tu] option descriptions for passt and pasta
conf: Permit -[tTuU] all in pasta mode
fwd: Better split forwarding rule specification from associated
sockets
fwd_rule: Move forwarding rule formatting
conf: Pass protocol explicitly to conf_ports_range_except()
fwd: Split rule building from rule adding
fwd_rule: Move rule conflict checking from fwd_rule_add() to caller
fwd: Improve error handling in fwd_rule_add()
conf: Don't be strict about exclusivity of forwarding mode
conf: Rework stepping through chunks of port specifiers
conf: Rework checking for garbage after a range
conf: Move "all" handling to port specifier
conf: Allow user-specified auto-scanned port forwarding ranges
conf: Move SO_BINDTODEVICE workaround to conf_ports()
conf: Don't pass raw commandline argument to conf_ports_spec()

Makefile | 10 +-
conf.c | 541 ++++++++++++++++++++++++++---------------------------
fwd.c | 190 ++++++-------------
fwd.h | 21 +--
fwd_rule.c | 132 +++++++++++++
fwd_rule.h | 15 ++
passt.1 | 214 +++++++--------------
7 files changed, 542 insertions(+), 581 deletions(-)
create mode 100644 fwd_rule.c

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2.53.0