firewall protocol supportproto-firewall

Patch by Alexander V. Chernikov <melifaro@ipfw.ru>

Hello list!

This patch adds 'firewall' protocol permitting prefixes announced to
this protocol to be put in configured firewall table with optional value.

Supported firewalls: IPFW, PF, *
Optional value support: IPFW, *

Sample configuration:

protocol bgp {
	..
	import filter { fw_value = 42; accept; } # Set firewall optional value
for each prefix
}

protocol firewall {
        fwtype ipfw;
        fwtable "2";
        export all;
        flush always; # do flush both on startup and shutdown
};

Tested on FreeBSD 8.X, PF should work on Open/NetBSD, too.

[*] I can add support for ipset on demand. However I can't understand
how it can be [effectively] used without some kind of radix/rbtree
backend (according to docs).

P.S.
This can be thought as first step for implementation BGP FlowSpec (RFC 5575)

1 files changed, 1 insertions, 1 deletions

diff --git a/sysdep/bsd/Makefile b/sysdep/bsd/Makefile
index dfa32747..307d461f 100644
--- a/sysdep/bsd/Makefile
+++ b/sysdep/bsd/Makefile
@@ -1,4 +1,4 @@
-src := krt-sock.c
+src := krt-sock.c fw.c
 obj := $(src-o-files)
 $(all-daemon)
 $(conf-y-targets): $(s)krt-sock.Y