Combine parse_target() and command_jump() implementations

Merge these two functions from xtables, iptables, ip6tables and
arptables. Both functions were basically identical in the first three,
only the last one required a bit more attention.

To eliminate access to 'invflags' in variant-specific location, move the
call to set_option() into callers. This is actually consistent with
parsing of other options in them.

As with command_match(), use xt_params instead of the different
*_globals objects to refer to 'opts' and 'orig_opts'.

It was necessary to rename parse_target() as it otherwise clashes with a
static function of same name in libxt_SET.

In arptables, the maximum allowed target name is a bit larger, so
introduce xtables_globals.target_maxnamelen defining the value. It is
used in the shared xt_parse_target() implementation.

Implementation of command_jump() in arptables diverted from the others
for no obvious reason. The call to parse_target() was done outside of it
and a pointer to cs->arp was passed but not used inside.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/xtables.h b/include/xtables.h
index bf169b08..fd9e6c33 100644
--- a/include/xtables.h
+++ b/include/xtables.h
@@ -424,6 +424,7 @@ struct xtables_globals
 	struct option *opts;
 	void (*exit_err)(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
 	int (*compat_rev)(const char *name, uint8_t rev, int opt);
+	size_t target_maxnamelen;
 };
 
 #define XT_GETOPT_TABLEEND {.name = NULL, .has_arg = false}