linux/include/net/garp.h
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   1#ifndef _NET_GARP_H
   2#define _NET_GARP_H
   3
   4#include <net/stp.h>
   5
   6#define GARP_PROTOCOL_ID        0x1
   7#define GARP_END_MARK           0x0
   8
   9struct garp_pdu_hdr {
  10        __be16  protocol;
  11};
  12
  13struct garp_msg_hdr {
  14        u8      attrtype;
  15};
  16
  17enum garp_attr_event {
  18        GARP_LEAVE_ALL,
  19        GARP_JOIN_EMPTY,
  20        GARP_JOIN_IN,
  21        GARP_LEAVE_EMPTY,
  22        GARP_LEAVE_IN,
  23        GARP_EMPTY,
  24};
  25
  26struct garp_attr_hdr {
  27        u8      len;
  28        u8      event;
  29        u8      data[];
  30};
  31
  32struct garp_skb_cb {
  33        u8      cur_type;
  34};
  35
  36static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
  37{
  38        BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
  39                     FIELD_SIZEOF(struct sk_buff, cb));
  40        return (struct garp_skb_cb *)skb->cb;
  41}
  42
  43enum garp_applicant_state {
  44        GARP_APPLICANT_INVALID,
  45        GARP_APPLICANT_VA,
  46        GARP_APPLICANT_AA,
  47        GARP_APPLICANT_QA,
  48        GARP_APPLICANT_LA,
  49        GARP_APPLICANT_VP,
  50        GARP_APPLICANT_AP,
  51        GARP_APPLICANT_QP,
  52        GARP_APPLICANT_VO,
  53        GARP_APPLICANT_AO,
  54        GARP_APPLICANT_QO,
  55        __GARP_APPLICANT_MAX
  56};
  57#define GARP_APPLICANT_MAX      (__GARP_APPLICANT_MAX - 1)
  58
  59enum garp_event {
  60        GARP_EVENT_REQ_JOIN,
  61        GARP_EVENT_REQ_LEAVE,
  62        GARP_EVENT_R_JOIN_IN,
  63        GARP_EVENT_R_JOIN_EMPTY,
  64        GARP_EVENT_R_EMPTY,
  65        GARP_EVENT_R_LEAVE_IN,
  66        GARP_EVENT_R_LEAVE_EMPTY,
  67        GARP_EVENT_TRANSMIT_PDU,
  68        __GARP_EVENT_MAX
  69};
  70#define GARP_EVENT_MAX          (__GARP_EVENT_MAX - 1)
  71
  72enum garp_action {
  73        GARP_ACTION_NONE,
  74        GARP_ACTION_S_JOIN_IN,
  75        GARP_ACTION_S_LEAVE_EMPTY,
  76};
  77
  78struct garp_attr {
  79        struct rb_node                  node;
  80        enum garp_applicant_state       state;
  81        u8                              type;
  82        u8                              dlen;
  83        unsigned char                   data[];
  84};
  85
  86enum garp_applications {
  87        GARP_APPLICATION_GVRP,
  88        __GARP_APPLICATION_MAX
  89};
  90#define GARP_APPLICATION_MAX    (__GARP_APPLICATION_MAX - 1)
  91
  92struct garp_application {
  93        enum garp_applications  type;
  94        unsigned int            maxattr;
  95        struct stp_proto        proto;
  96};
  97
  98struct garp_applicant {
  99        struct garp_application *app;
 100        struct net_device       *dev;
 101        struct timer_list       join_timer;
 102
 103        spinlock_t              lock;
 104        struct sk_buff_head     queue;
 105        struct sk_buff          *pdu;
 106        struct rb_root          gid;
 107        struct rcu_head         rcu;
 108};
 109
 110struct garp_port {
 111        struct garp_applicant __rcu     *applicants[GARP_APPLICATION_MAX + 1];
 112        struct rcu_head                 rcu;
 113};
 114
 115extern int      garp_register_application(struct garp_application *app);
 116extern void     garp_unregister_application(struct garp_application *app);
 117
 118extern int      garp_init_applicant(struct net_device *dev,
 119                                    struct garp_application *app);
 120extern void     garp_uninit_applicant(struct net_device *dev,
 121                                      struct garp_application *app);
 122
 123extern int      garp_request_join(const struct net_device *dev,
 124                                  const struct garp_application *app,
 125                                  const void *data, u8 len, u8 type);
 126extern void     garp_request_leave(const struct net_device *dev,
 127                                   const struct garp_application *app,
 128                                   const void *data, u8 len, u8 type);
 129
 130#endif /* _NET_GARP_H */
 131
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