X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fflow.c;h=6b78ae36f2d753b0b7283ed44b3dfc67185ac842;hb=f137ed099e3feaa4a9d8c5dc5f5234945451795e;hp=916d41c54b44b21b51939bd6380221c4c994f828;hpb=8b3b8dd1a5a1a8ba3b7e62798ff70cb8f9fc7659;p=openvswitch

diff --git a/lib/flow.c b/lib/flow.c
index 916d41c5..6b78ae36 100644
--- 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)
 {
@@ -546,6 +606,8 @@ flow_wildcards_is_exact(const struct flow_wildcards *wc)
 {
     int i;
 
+    BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
     if (wc->wildcards
         || wc->tun_id_mask != htonll(UINT64_MAX)
         || wc->nw_src_mask != htonl(UINT32_MAX)
@@ -565,6 +627,34 @@ flow_wildcards_is_exact(const struct flow_wildcards *wc)
     return true;
 }
 
+/* Returns true if 'wc' matches every packet, false if 'wc' fixes any bits or
+ * fields. */
+bool
+flow_wildcards_is_catchall(const struct flow_wildcards *wc)
+{
+    int i;
+
+    BUILD_ASSERT_DECL(FLOW_WC_SEQ == 1);
+
+    if (wc->wildcards != FWW_ALL
+        || wc->tun_id_mask != htonll(0)
+        || wc->nw_src_mask != htonl(0)
+        || wc->nw_dst_mask != htonl(0)
+        || wc->vlan_tci_mask != htons(0)
+        || !ipv6_mask_is_any(&wc->ipv6_src_mask)
+        || !ipv6_mask_is_any(&wc->ipv6_dst_mask)) {
+        return false;
+    }
+
+    for (i = 0; i < FLOW_N_REGS; i++) {
+        if (wc->reg_masks[i] != 0) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 /* Initializes 'dst' as the combination of wildcards in 'src1' and 'src2'.
  * That is, a bit or a field is wildcarded in 'dst' if it is wildcarded in
  * 'src1' or 'src2' or both.  */