optimize: add binop expression support

Do recursive call using left expression in the binop expression tree to
search for the primary expression.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/src/optimize.c b/src/optimize.c
index 2063761a..54dde948 100644
--- a/src/optimize.c
+++ b/src/optimize.c
@@ -99,6 +99,8 @@ static bool __expr_cmp(const struct expr *expr_a, const struct expr *expr_b)
 		if (expr_a->fib.result != expr_b->fib.result)
 			return false;
 		break;
+	case EXPR_BINOP:
+		return __expr_cmp(expr_a->left, expr_b->left);
 	default:
 		return false;
 	}