1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _NET_GARP_H
3#define _NET_GARP_H
4
5#include <net/stp.h>
6
7#define GARP_PROTOCOL_ID 0x1
8#define GARP_END_MARK 0x0
9
10struct garp_pdu_hdr {
11 __be16 protocol;
12};
13
14struct garp_msg_hdr {
15 u8 attrtype;
16};
17
18enum garp_attr_event {
19 GARP_LEAVE_ALL,
20 GARP_JOIN_EMPTY,
21 GARP_JOIN_IN,
22 GARP_LEAVE_EMPTY,
23 GARP_LEAVE_IN,
24 GARP_EMPTY,
25};
26
27struct garp_attr_hdr {
28 u8 len;
29 u8 event;
30 u8 data[];
31};
32
33struct garp_skb_cb {
34 u8 cur_type;
35};
36
37static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
38{
39 BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
40 FIELD_SIZEOF(struct sk_buff, cb));
41 return (struct garp_skb_cb *)skb->cb;
42}
43
44enum garp_applicant_state {
45 GARP_APPLICANT_INVALID,
46 GARP_APPLICANT_VA,
47 GARP_APPLICANT_AA,
48 GARP_APPLICANT_QA,
49 GARP_APPLICANT_LA,
50 GARP_APPLICANT_VP,
51 GARP_APPLICANT_AP,
52 GARP_APPLICANT_QP,
53 GARP_APPLICANT_VO,
54 GARP_APPLICANT_AO,
55 GARP_APPLICANT_QO,
56 __GARP_APPLICANT_MAX
57};
58#define GARP_APPLICANT_MAX (__GARP_APPLICANT_MAX - 1)
59
60enum garp_event {
61 GARP_EVENT_REQ_JOIN,
62 GARP_EVENT_REQ_LEAVE,
63 GARP_EVENT_R_JOIN_IN,
64 GARP_EVENT_R_JOIN_EMPTY,
65 GARP_EVENT_R_EMPTY,
66 GARP_EVENT_R_LEAVE_IN,
67 GARP_EVENT_R_LEAVE_EMPTY,
68 GARP_EVENT_TRANSMIT_PDU,
69 __GARP_EVENT_MAX
70};
71#define GARP_EVENT_MAX (__GARP_EVENT_MAX - 1)
72
73enum garp_action {
74 GARP_ACTION_NONE,
75 GARP_ACTION_S_JOIN_IN,
76 GARP_ACTION_S_LEAVE_EMPTY,
77};
78
79struct garp_attr {
80 struct rb_node node;
81 enum garp_applicant_state state;
82 u8 type;
83 u8 dlen;
84 unsigned char data[];
85};
86
87enum garp_applications {
88 GARP_APPLICATION_GVRP,
89 __GARP_APPLICATION_MAX
90};
91#define GARP_APPLICATION_MAX (__GARP_APPLICATION_MAX - 1)
92
93struct garp_application {
94 enum garp_applications type;
95 unsigned int maxattr;
96 struct stp_proto proto;
97};
98
99struct garp_applicant {
100 struct garp_application *app;
101 struct net_device *dev;
102 struct timer_list join_timer;
103
104 spinlock_t lock;
105 struct sk_buff_head queue;
106 struct sk_buff *pdu;
107 struct rb_root gid;
108 struct rcu_head rcu;
109};
110
111struct garp_port {
112 struct garp_applicant __rcu *applicants[GARP_APPLICATION_MAX + 1];
113 struct rcu_head rcu;
114};
115
116int garp_register_application(struct garp_application *app);
117void garp_unregister_application(struct garp_application *app);
118
119int garp_init_applicant(struct net_device *dev, struct garp_application *app);
120void garp_uninit_applicant(struct net_device *dev,
121 struct garp_application *app);
122
123int garp_request_join(const struct net_device *dev,
124 const struct garp_application *app, const void *data,
125 u8 len, u8 type);
126void 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