iptables-compat: fix address prefix

This patch fixes:

 # iptables-compat -I INPUT -s 1.2.3.0/24

generates this bytecode:

ip filter INPUT 20
  [ payload load 4b @ network header + 12 => reg 1 ]
  [ bitwise reg 1 = (reg=1 & 0x00ffffff ) ^ 0x00000000 ]
  [ cmp eq reg 1 0x00030201 ]
  [ counter pkts 0 bytes 0 ]

and it displays:

 # iptables-compat-save
...
-A INPUT -s 1.2.3.0/24

ip6tables-compat and arptables-compat are also fixed.

This patch uses the new context structure to annotate payload, meta
and bitwise, so it interprets the cmp expression based on the context.
This provides a rudimentary way to delinearize the iptables-compat
rule-set, but it should be enough for the built-in xtables selectors
since we still use the xtables extensions.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions