Implement OFPC_FRAG_DROP fragment handling policy.

[openvswitch] / datapath / flow.c

diff --git a/datapath/flow.c b/datapath/flow.c
index c49a4cb1ae14c60bb5bda8300a9657dda4b84258..094d32b5857ba4efdf0d85f2eef518d81f5f948d 100644 (file)
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -211,12 +211,14 @@ static int udphdr_ok(struct sk_buff *skb)
 }
 
 /* Parses the Ethernet frame in 'skb', which was received on 'in_port',
- * and initializes 'key' to match. */
-void flow_extract(struct sk_buff *skb, uint16_t in_port,
-                 struct sw_flow_key *key)
+ * and initializes 'key' to match.  Returns 1 if 'skb' contains an IP
+ * fragment, 0 otherwise. */
+int flow_extract(struct sk_buff *skb, uint16_t in_port,
+                struct sw_flow_key *key)
 {
        struct ethhdr *mac;
        int nh_ofs, th_ofs;
+       int retval = 0;
 
        key->in_port = htons(in_port);
        key->wildcards = 0;
@@ -292,10 +294,11 @@ void flow_extract(struct sk_buff *skb, uint16_t in_port,
                                }
                        }
                } else {
+                       retval = 1;
                        goto no_th;
                }
 
-               return;
+               return 0;
        }
 
        key->nw_src = 0;
@@ -307,6 +310,7 @@ no_proto:
 no_th:
        key->tp_src = 0;
        key->tp_dst = 0;
+       return retval;
 }
 
 /* Initializes the flow module.