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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 
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 */
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