include/net/garp.h

   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
   9 struct garp_pdu_hdr {
  10         __be16  protocol;
  11 };
  12
  13 struct garp_msg_hdr {
  14         u8      attrtype;
  15 };
  16
  17 enum 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
  26 struct garp_attr_hdr {
  27         u8      len;
  28         u8      event;
  29         u8      data[];
  30 };
  31
  32 struct garp_skb_cb {
  33         u8      cur_type;
  34 };
  35
  36 static 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
  43 enum 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
  59 enum 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
  72 enum garp_action {
  73         GARP_ACTION_NONE,
  74         GARP_ACTION_S_JOIN_IN,
  75         GARP_ACTION_S_LEAVE_EMPTY,
  76 };
  77
  78 struct 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
  86 enum garp_applications {
  87         GARP_APPLICATION_GVRP,
  88         __GARP_APPLICATION_MAX
  89 };
  90 #define GARP_APPLICATION_MAX    (__GARP_APPLICATION_MAX - 1)
  91
  92 struct garp_application {
  93         enum garp_applications  type;
  94         unsigned int            maxattr;
  95         struct stp_proto        proto;
  96 };
  97
  98 struct 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
 110 struct garp_port {
 111         struct garp_applicant __rcu     *applicants[GARP_APPLICATION_MAX + 1];
 112         struct rcu_head                 rcu;
 113 };
 114
 115 extern int      garp_register_application(struct garp_application *app);
 116 extern void     garp_unregister_application(struct garp_application *app);
 117
 118 extern int      garp_init_applicant(struct net_device *dev,
 119                                     struct garp_application *app);
 120 extern void     garp_uninit_applicant(struct net_device *dev,
 121                                       struct garp_application *app);
 122
 123 extern int      garp_request_join(const struct net_device *dev,
 124                                   const struct garp_application *app,
 125                                   const void *data, u8 len, u8 type);
 126 extern 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 */