classifier: Move zero_wildcards() to flow.c as public flow_zero_wildcards().

[sliver-openvswitch.git] / lib / flow.c

diff --git a/lib/flow.c b/lib/flow.c
index 916d41c..8ec31ab 100644 (file)
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -445,6 +445,66 @@ flow_extract_stats(const struct flow *flow, struct ofpbuf *packet,
     stats->n_packets = 1;
 }
 
+/* For every bit of a field that is wildcarded in 'wildcards', sets the
+ * corresponding bit in 'flow' to zero. */
+void
+flow_zero_wildcards(struct flow *flow, const struct flow_wildcards *wildcards)
+{
+    const flow_wildcards_t wc = wildcards->wildcards;
+    int i;
+
+    BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
+    for (i = 0; i < FLOW_N_REGS; i++) {
+        flow->regs[i] &= wildcards->reg_masks[i];
+    }
+    flow->tun_id &= wildcards->tun_id_mask;
+    flow->nw_src &= wildcards->nw_src_mask;
+    flow->nw_dst &= wildcards->nw_dst_mask;
+    if (wc & FWW_IN_PORT) {
+        flow->in_port = 0;
+    }
+    flow->vlan_tci &= wildcards->vlan_tci_mask;
+    if (wc & FWW_DL_TYPE) {
+        flow->dl_type = 0;
+    }
+    if (wc & FWW_TP_SRC) {
+        flow->tp_src = 0;
+    }
+    if (wc & FWW_TP_DST) {
+        flow->tp_dst = 0;
+    }
+    if (wc & FWW_DL_SRC) {
+        memset(flow->dl_src, 0, sizeof flow->dl_src);
+    }
+    if (wc & FWW_DL_DST) {
+        flow->dl_dst[0] &= 0x01;
+        memset(&flow->dl_dst[1], 0, 5);
+    }
+    if (wc & FWW_ETH_MCAST) {
+        flow->dl_dst[0] &= 0xfe;
+    }
+    if (wc & FWW_NW_PROTO) {
+        flow->nw_proto = 0;
+    }
+    if (wc & FWW_NW_TOS) {
+        flow->nw_tos = 0;
+    }
+    if (wc & FWW_ARP_SHA) {
+        memset(flow->arp_sha, 0, sizeof flow->arp_sha);
+    }
+    if (wc & FWW_ARP_THA) {
+        memset(flow->arp_tha, 0, sizeof flow->arp_tha);
+    }
+    flow->ipv6_src = ipv6_addr_bitand(&flow->ipv6_src,
+            &wildcards->ipv6_src_mask);
+    flow->ipv6_dst = ipv6_addr_bitand(&flow->ipv6_dst,
+            &wildcards->ipv6_dst_mask);
+    if (wc & FWW_ND_TARGET) {
+        memset(&flow->nd_target, 0, sizeof flow->nd_target);
+    }
+}
+
 char *
 flow_to_string(const struct flow *flow)
 {