+/**
+ * struct tcf_pkt_info - packet information
+ */
+struct tcf_pkt_info
+{
+ unsigned char * ptr;
+ int nexthdr;
+};
+
+#ifdef CONFIG_NET_EMATCH
+
+struct tcf_ematch_ops;
+
+/**
+ * struct tcf_ematch - extended match (ematch)
+ *
+ * @matchid: identifier to allow userspace to reidentify a match
+ * @flags: flags specifying attributes and the relation to other matches
+ * @ops: the operations lookup table of the corresponding ematch module
+ * @datalen: length of the ematch specific configuration data
+ * @data: ematch specific data
+ */
+struct tcf_ematch
+{
+ struct tcf_ematch_ops * ops;
+ unsigned long data;
+ unsigned int datalen;
+ u16 matchid;
+ u16 flags;
+};
+
+static inline int tcf_em_is_container(struct tcf_ematch *em)
+{
+ return !em->ops;
+}
+
+static inline int tcf_em_is_simple(struct tcf_ematch *em)
+{
+ return em->flags & TCF_EM_SIMPLE;
+}
+
+static inline int tcf_em_is_inverted(struct tcf_ematch *em)
+{
+ return em->flags & TCF_EM_INVERT;
+}
+
+static inline int tcf_em_last_match(struct tcf_ematch *em)
+{
+ return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
+}
+
+static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
+{
+ if (tcf_em_last_match(em))
+ return 1;
+
+ if (result == 0 && em->flags & TCF_EM_REL_AND)
+ return 1;
+
+ if (result != 0 && em->flags & TCF_EM_REL_OR)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * struct tcf_ematch_tree - ematch tree handle
+ *
+ * @hdr: ematch tree header supplied by userspace
+ * @matches: array of ematches
+ */
+struct tcf_ematch_tree
+{
+ struct tcf_ematch_tree_hdr hdr;
+ struct tcf_ematch * matches;
+
+};
+
+/**
+ * struct tcf_ematch_ops - ematch module operations
+ *
+ * @kind: identifier (kind) of this ematch module
+ * @datalen: length of expected configuration data (optional)
+ * @change: called during validation (optional)
+ * @match: called during ematch tree evaluation, must return 1/0
+ * @destroy: called during destroyage (optional)
+ * @dump: called during dumping process (optional)
+ * @owner: owner, must be set to THIS_MODULE
+ * @link: link to previous/next ematch module (internal use)
+ */
+struct tcf_ematch_ops
+{
+ int kind;
+ int datalen;
+ int (*change)(struct tcf_proto *, void *,
+ int, struct tcf_ematch *);
+ int (*match)(struct sk_buff *, struct tcf_ematch *,
+ struct tcf_pkt_info *);
+ void (*destroy)(struct tcf_proto *,
+ struct tcf_ematch *);
+ int (*dump)(struct sk_buff *, struct tcf_ematch *);