ofproto-dpif-xlate: Identify STP BPDUs more specifically.

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

diff --git a/lib/flow.h b/lib/flow.h
index c834cb5..e63e4e2 100644 (file)
--- a/lib/flow.h
+++ b/lib/flow.h
@@ -402,6 +402,32 @@ void miniflow_destroy(struct miniflow *);
 
 void miniflow_expand(const struct miniflow *, struct flow *);
 
+static inline uint32_t
+mf_get_next_in_map(uint64_t *fmap, uint64_t rm1bit, const uint32_t **fp,
+                   uint32_t *value)
+{
+    *value = 0;
+    if (*fmap & rm1bit) {
+        uint64_t trash = *fmap & (rm1bit - 1);
+
+        if (trash) {
+            *fmap -= trash;
+            *fp += count_1bits(trash);
+        }
+        *value = **fp;
+    }
+    return rm1bit != 0;
+}
+
+/* Iterate through all miniflow u32 values specified by the 'MAP'.
+ * This works as the first statement in a block.*/
+#define MINIFLOW_FOR_EACH_IN_MAP(VALUE, FLOW, MAP)                      \
+    const uint32_t *fp_ = (FLOW)->values;                               \
+    uint64_t rm1bit_, fmap_, map_;                                      \
+    for (fmap_ = (FLOW)->map, map_ = (MAP), rm1bit_ = rightmost_1bit(map_); \
+         mf_get_next_in_map(&fmap_, rm1bit_, &fp_, &(VALUE));           \
+         map_ -= rm1bit_, rm1bit_ = rightmost_1bit(map_))
+
 /* These accessors use byte offsets, which are assumed to be compile-time
  * constants. */
 static inline uint8_t miniflow_get_u8(const struct miniflow *,
@@ -418,6 +444,7 @@ static inline ovs_be32 miniflow_get_be32(const struct miniflow *,
 static inline uint16_t miniflow_get_vid(const struct miniflow *);
 static inline uint16_t miniflow_get_tcp_flags(const struct miniflow *);
 static inline ovs_be64 miniflow_get_metadata(const struct miniflow *);
+static inline uint8_t miniflow_get_u8(const struct miniflow *, unsigned int ofs);
 
 bool miniflow_equal(const struct miniflow *a, const struct miniflow *b);
 bool miniflow_equal_in_minimask(const struct miniflow *a,
@@ -432,6 +459,7 @@ uint32_t miniflow_hash_in_minimask(const struct miniflow *,
 uint64_t miniflow_get_map_in_range(const struct miniflow *miniflow,
                                    uint8_t start, uint8_t end,
                                    unsigned int *offset);
+uint32_t miniflow_hash_5tuple(const struct miniflow *flow, uint32_t basis);
 
 \f
 /* Compressed flow wildcards. */
@@ -589,4 +617,10 @@ static inline bool is_icmpv6(const struct flow *flow)
             && flow->nw_proto == IPPROTO_ICMPV6);
 }
 
+static inline bool is_stp(const struct flow *flow)
+{
+    return (eth_addr_equals(flow->dl_dst, eth_addr_stp)
+            && flow->dl_type == htons(FLOW_DL_TYPE_NONE));
+}
+
 #endif /* flow.h */