src: replace compound_expr_alloc() by type safe function

Replace compound_expr_alloc() by {set,list,concat}_expr_alloc() to
validate expression type.

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

5 files changed, 22 insertions, 22 deletions

diff --git a/include/expression.h b/include/expression.h
index 32812d28..e73ad90e 100644
--- a/include/expression.h
+++ b/include/expression.h
@@ -523,8 +523,6 @@ extern struct expr *range_expr_alloc(const struct location *loc,
 				     struct expr *low, struct expr *high);
 struct expr *range_expr_to_prefix(struct expr *range);
 
-extern struct expr *compound_expr_alloc(const struct location *loc,
-					enum expr_types etypes);
 extern void list_expr_sort(struct list_head *head);
 extern void list_splice_sorted(struct list_head *list, struct list_head *head);
 
diff --git a/src/evaluate.c b/src/evaluate.c
index cb05e694..2b1f1c55 100644
--- a/src/evaluate.c
+++ b/src/evaluate.c
@@ -5497,7 +5497,7 @@ static struct expr *expr_set_to_list(struct eval_ctx *ctx, struct expr *dev_expr
 
 	loc = dev_expr->location;
 	expr_free(dev_expr);
-	dev_expr = compound_expr_alloc(&loc, EXPR_LIST);
+	dev_expr = list_expr_alloc(&loc);
 	list_splice_init(&tmp, &expr_list(dev_expr)->expressions);
 
 	return dev_expr;
diff --git a/src/expression.c b/src/expression.c
index 92ab40e2..019c263f 100644
--- a/src/expression.c
+++ b/src/expression.c
@@ -1016,17 +1016,6 @@ struct expr *range_expr_alloc(const struct location *loc,
 	return expr;
 }
 
-struct expr *compound_expr_alloc(const struct location *loc,
-				 enum expr_types etype)
-{
-	struct expr *expr;
-
-	expr = expr_alloc(loc, etype, &invalid_type, BYTEORDER_INVALID, 0);
-	/* same layout for EXPR_CONCAT, EXPR_SET and EXPR_LIST. */
-	init_list_head(&expr->expr_set.expressions);
-	return expr;
-}
-
 static void concat_expr_destroy(struct expr *expr)
 {
 	struct expr *i, *next;
@@ -1219,7 +1208,12 @@ static const struct expr_ops concat_expr_ops = {
 
 struct expr *concat_expr_alloc(const struct location *loc)
 {
-	return compound_expr_alloc(loc, EXPR_CONCAT);
+	struct expr *expr;
+
+	expr = expr_alloc(loc, EXPR_CONCAT, &invalid_type, BYTEORDER_INVALID, 0);
+	init_list_head(&expr_concat(expr)->expressions);
+
+	return expr;
 }
 
 void concat_expr_add(struct expr *concat, struct expr *item)
@@ -1276,7 +1270,12 @@ static const struct expr_ops list_expr_ops = {
 
 struct expr *list_expr_alloc(const struct location *loc)
 {
-	return compound_expr_alloc(loc, EXPR_LIST);
+	struct expr *expr;
+
+	expr = expr_alloc(loc, EXPR_LIST, &invalid_type, BYTEORDER_INVALID, 0);
+	init_list_head(&expr_list(expr)->expressions);
+
+	return expr;
 }
 
 void list_expr_add(struct expr *expr, struct expr *item)
@@ -1427,7 +1426,10 @@ static const struct expr_ops set_expr_ops = {
 
 struct expr *set_expr_alloc(const struct location *loc, const struct set *set)
 {
-	struct expr *set_expr = compound_expr_alloc(loc, EXPR_SET);
+	struct expr *set_expr;
+
+	set_expr = expr_alloc(loc, EXPR_SET, &invalid_type, BYTEORDER_INVALID, 0);
+	init_list_head(&expr_set(set_expr)->expressions);
 
 	if (!set)
 		return set_expr;
diff --git a/src/parser_bison.y b/src/parser_bison.y
index bdcce4c1..3fa75197 100644
--- a/src/parser_bison.y
+++ b/src/parser_bison.y
@@ -2502,7 +2502,7 @@ flowtable_expr		:	'{'	flowtable_list_expr	'}'
 
 flowtable_list_expr	:	flowtable_expr_member
 			{
-				$$ = compound_expr_alloc(&@$, EXPR_LIST);
+				$$ = list_expr_alloc(&@$);
 				list_expr_add($$, $1);
 			}
 			|	flowtable_list_expr	COMMA	flowtable_expr_member
@@ -2841,14 +2841,14 @@ dev_spec		:	DEVICE	string
 				if (!expr)
 					YYERROR;
 
-				$$ = compound_expr_alloc(&@$, EXPR_LIST);
+				$$ = list_expr_alloc(&@$);
 				list_expr_add($$, expr);
 
 			}
 			|	DEVICE	variable_expr
 			{
 				datatype_set($2->sym->expr, &ifname_type);
-				$$ = compound_expr_alloc(&@$, EXPR_LIST);
+				$$ = list_expr_alloc(&@$);
 				list_expr_add($$, $2);
 			}
 			|	DEVICES		'='	flowtable_expr
@@ -4748,7 +4748,7 @@ set_rhs_expr		:	concat_rhs_expr
 
 initializer_expr	:	rhs_expr
 			|	list_rhs_expr
-			|	'{' '}'		{ $$ = compound_expr_alloc(&@$, EXPR_SET); }
+			|	'{' '}'		{ $$ = set_expr_alloc(&@$, NULL); }
 			|	DASH	NUM
 			{
 				int32_t num = -$2;
diff --git a/src/parser_json.c b/src/parser_json.c
index c107dfc8..e7826250 100644
--- a/src/parser_json.c
+++ b/src/parser_json.c
@@ -3026,7 +3026,7 @@ static struct expr *ifname_expr_alloc(struct json_ctx *ctx,
 
 static struct expr *json_parse_devs(struct json_ctx *ctx, json_t *root)
 {
-	struct expr *tmp, *expr = compound_expr_alloc(int_loc, EXPR_LIST);
+	struct expr *tmp, *expr = list_expr_alloc(int_loc);
 	const char *dev;
 	json_t *value;
 	size_t index;