libxtables: provide better final_check

This passes the per-extension data block to the new x6_fcheck function
pointer, which can then do last alterations without using hacks
like global variables (think libxt_statistic).

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

1 files changed, 40 insertions, 0 deletions

diff --git a/xtoptions.c b/xtoptions.c
index 3286aa10..df917b67 100644
--- a/xtoptions.c
+++ b/xtoptions.c
@@ -297,3 +297,43 @@ void xtables_options_fcheck(const char *name, unsigned int xflags,
 		}
 	}
 }
+
+/**
+ * Dispatch arguments to the appropriate final_check function, based upon the
+ * extension's choice of API.
+ */
+void xtables_option_tfcall(struct xtables_target *t)
+{
+	if (t->x6_fcheck != NULL) {
+		struct xt_fcheck_call cb;
+
+		cb.ext_name = t->name;
+		cb.data     = t->t->data;
+		cb.xflags   = t->tflags;
+		t->x6_fcheck(&cb);
+	} else if (t->final_check != NULL) {
+		t->final_check(t->tflags);
+	}
+	if (t->x6_options != NULL)
+		xtables_options_fcheck(t->name, t->tflags, t->x6_options);
+}
+
+/**
+ * Dispatch arguments to the appropriate final_check function, based upon the
+ * extension's choice of API.
+ */
+void xtables_option_mfcall(struct xtables_match *m)
+{
+	if (m->x6_fcheck != NULL) {
+		struct xt_fcheck_call cb;
+
+		cb.ext_name = m->name;
+		cb.data     = m->m->data;
+		cb.xflags   = m->mflags;
+		m->x6_fcheck(&cb);
+	} else if (m->final_check != NULL) {
+		m->final_check(m->mflags);
+	}
+	if (m->x6_options != NULL)
+		xtables_options_fcheck(m->name, m->mflags, m->x6_options);
+}