From 193eb87453463d45eb10a3d3adbffedc0a762d1f Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Mon, 8 Nov 2010 16:35:34 -0800
Subject: [PATCH] classifier: New function cls_rule_equal().

---
 lib/classifier.c        | 10 ++++++++++
 lib/classifier.h        |  2 ++
 tests/test-classifier.c | 13 +++----------
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/classifier.c b/lib/classifier.c
index 384242297..f3b5d5d2d 100644
--- a/lib/classifier.c
+++ b/lib/classifier.c
@@ -307,6 +307,16 @@ cls_rule_set_icmp_code(struct cls_rule *rule, uint8_t icmp_code)
     rule->flow.icmp_code = htons(icmp_code);
 }
 
+/* Returns true if 'a' and 'b' have the same priority, wildcard the same
+ * fields, and have the same values for fixed fields, otherwise false. */
+bool
+cls_rule_equal(const struct cls_rule *a, const struct cls_rule *b)
+{
+    return (a->priority == b->priority
+            && flow_wildcards_equal(&a->wc, &b->wc)
+            && flow_equal(&a->flow, &b->flow));
+}
+
 /* Converts 'rule' to a string and returns the string.  The caller must free
  * the string (with free()). */
 char *
diff --git a/lib/classifier.h b/lib/classifier.h
index c22a161e6..ea4d6fc83 100644
--- a/lib/classifier.h
+++ b/lib/classifier.h
@@ -96,6 +96,8 @@ void cls_rule_set_nw_tos(struct cls_rule *, uint8_t);
 void cls_rule_set_icmp_type(struct cls_rule *, uint8_t);
 void cls_rule_set_icmp_code(struct cls_rule *, uint8_t);
 
+bool cls_rule_equal(const struct cls_rule *, const struct cls_rule *);
+
 char *cls_rule_to_string(const struct cls_rule *);
 void cls_rule_print(const struct cls_rule *);
 
diff --git a/tests/test-classifier.c b/tests/test-classifier.c
index f4ccfdfe6..45700ed9e 100644
--- a/tests/test-classifier.c
+++ b/tests/test-classifier.c
@@ -139,11 +139,8 @@ tcls_insert(struct tcls *tcls, const struct test_rule *rule)
     assert(rule->cls_rule.wc.wildcards || rule->cls_rule.priority == UINT_MAX);
     for (i = 0; i < tcls->n_rules; i++) {
         const struct cls_rule *pos = &tcls->rules[i]->cls_rule;
-        if (pos->priority == rule->cls_rule.priority
-            && pos->wc.wildcards == rule->cls_rule.wc.wildcards
-            && flow_equal(&pos->flow, &rule->cls_rule.flow)) {
-            /* Exact match.
-             * XXX flow_equal should ignore wildcarded fields */
+        if (cls_rule_equal(pos, &rule->cls_rule)) {
+            /* Exact match. */
             free(tcls->rules[i]);
             tcls->rules[i] = xmemdup(rule, sizeof *rule);
             return tcls->rules[i];
@@ -383,11 +380,7 @@ compare_classifiers(struct classifier *cls, struct tcls *tcls)
             const struct test_rule *tr0 = test_rule_from_cls_rule(cr0);
             const struct test_rule *tr1 = test_rule_from_cls_rule(cr1);
 
-            assert(flow_equal(&cr0->flow, &cr1->flow));
-            assert(cr0->wc.wildcards == cr1->wc.wildcards);
-            assert(cr0->priority == cr1->priority);
-            /* Skip nw_src_mask and nw_dst_mask, because they are derived
-             * members whose values are used only for optimization. */
+            assert(cls_rule_equal(cr0, cr1));
             assert(tr0->aux == tr1->aux);
         }
     }
-- 
2.20.1