i386/linux/linux-2.3.21/include/net/pkt_cls.h

   1 #ifndef __NET_PKT_CLS_H
   2 #define __NET_PKT_CLS_H
   3
   4
   5 #include <linux/pkt_cls.h>
   6
   7 struct rtattr;
   8 struct tcmsg;
   9
  10 /* Basic packet classifier frontend definitions. */
  11
  12 struct tcf_result
  13 {
  14         unsigned long   class;
  15         u32             classid;
  16 };
  17
  18 struct tcf_proto
  19 {
  20         /* Fast access part */
  21         struct tcf_proto        *next;
  22         void                    *root;
  23         int                     (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
  24         u32                     protocol;
  25
  26         /* All the rest */
  27         u32                     prio;
  28         u32                     classid;
  29         struct Qdisc            *q;
  30         void                    *data;
  31         struct tcf_proto_ops    *ops;
  32 };
  33
  34 struct tcf_walker
  35 {
  36         int     stop;
  37         int     skip;
  38         int     count;
  39         int     (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
  40 };
  41
  42 struct tcf_proto_ops
  43 {
  44         struct tcf_proto_ops    *next;
  45         char                    kind[IFNAMSIZ];
  46
  47         int                     (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
  48         int                     (*init)(struct tcf_proto*);
  49         void                    (*destroy)(struct tcf_proto*);
  50
  51         unsigned long           (*get)(struct tcf_proto*, u32 handle);
  52         void                    (*put)(struct tcf_proto*, unsigned long);
  53         int                     (*change)(struct tcf_proto*, unsigned long, u32 handle, struct rtattr **, unsigned long *);
  54         int                     (*delete)(struct tcf_proto*, unsigned long);
  55         void                    (*walk)(struct tcf_proto*, struct tcf_walker *arg);
  56
  57         /* rtnetlink specific */
  58         int                     (*dump)(struct tcf_proto*, unsigned long, struct sk_buff *skb, struct tcmsg*);
  59 };
  60
  61 /* Main classifier routine: scans classifier chain attached
  62    to this qdisc, (optionally) tests for protocol and asks
  63    specific classifiers.
  64  */
  65
  66 extern __inline__ int tc_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
  67 {
  68         int err = 0;
  69         u32 protocol = skb->protocol;
  70
  71         for ( ; tp; tp = tp->next) {
  72                 if ((tp->protocol == protocol ||
  73                      tp->protocol == __constant_htons(ETH_P_ALL)) &&
  74                     (err = tp->classify(skb, tp, res)) >= 0)
  75                         return err;
  76         }
  77         return -1;
  78 }
  79
  80
  81
  82 extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
  83 extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
  84
  85
  86
  87 #endif