libxtables: define xtables_free_opts()

Introduce xtables_free_opts() an xtables variant of
free_opts() which uses xtables_globals already set
by xtables_set_params(). The end goal is to have all internal
references in xtables.c use xtables_free_opts() instead of
depending on external defined free_opts()

Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: Patrick McHardy <kaber@trash.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/xtables.c b/xtables.c
index aad5e533..95be5f8e 100644
--- a/xtables.c
+++ b/xtables.c
@@ -68,6 +68,17 @@ int xtables_set_params(struct xtables_globals *xtp)
 	return 0;
 }
 
+void xtables_free_opts(int reset_offset, struct option *original_opts)
+{
+	if (xt_params->opts != original_opts) {
+		if (original_opts) 
+			free(xt_params->opts);
+		xt_params->opts = original_opts;
+		if (reset_offset)
+			xt_params->option_offset = 0;
+	}
+}
+
 /**
  * xtables_afinfo - protocol family dependent information
  * @kmod:		kernel module basename (e.g. "ip_tables")