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
garp_cb(struct sk_buff * skb)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 */
131