1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _NET_GARP_H |
3 | #define _NET_GARP_H |
4 | |
5 | #include <linux/if_ether.h> |
6 | #include <linux/types.h> |
7 | #include <net/stp.h> |
8 | |
9 | #define GARP_PROTOCOL_ID 0x1 |
10 | #define GARP_END_MARK 0x0 |
11 | |
12 | struct garp_pdu_hdr { |
13 | __be16 protocol; |
14 | }; |
15 | |
16 | struct garp_msg_hdr { |
17 | u8 attrtype; |
18 | }; |
19 | |
20 | enum garp_attr_event { |
21 | GARP_LEAVE_ALL, |
22 | GARP_JOIN_EMPTY, |
23 | GARP_JOIN_IN, |
24 | GARP_LEAVE_EMPTY, |
25 | GARP_LEAVE_IN, |
26 | GARP_EMPTY, |
27 | }; |
28 | |
29 | struct garp_attr_hdr { |
30 | u8 len; |
31 | u8 event; |
32 | u8 data[]; |
33 | }; |
34 | |
35 | struct garp_skb_cb { |
36 | u8 cur_type; |
37 | }; |
38 | |
39 | static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb) |
40 | { |
41 | BUILD_BUG_ON(sizeof(struct garp_skb_cb) > |
42 | sizeof_field(struct sk_buff, cb)); |
43 | return (struct garp_skb_cb *)skb->cb; |
44 | } |
45 | |
46 | enum garp_applicant_state { |
47 | GARP_APPLICANT_INVALID, |
48 | GARP_APPLICANT_VA, |
49 | GARP_APPLICANT_AA, |
50 | GARP_APPLICANT_QA, |
51 | GARP_APPLICANT_LA, |
52 | GARP_APPLICANT_VP, |
53 | GARP_APPLICANT_AP, |
54 | GARP_APPLICANT_QP, |
55 | GARP_APPLICANT_VO, |
56 | GARP_APPLICANT_AO, |
57 | GARP_APPLICANT_QO, |
58 | __GARP_APPLICANT_MAX |
59 | }; |
60 | #define GARP_APPLICANT_MAX (__GARP_APPLICANT_MAX - 1) |
61 | |
62 | enum garp_event { |
63 | GARP_EVENT_REQ_JOIN, |
64 | GARP_EVENT_REQ_LEAVE, |
65 | GARP_EVENT_R_JOIN_IN, |
66 | GARP_EVENT_R_JOIN_EMPTY, |
67 | GARP_EVENT_R_EMPTY, |
68 | GARP_EVENT_R_LEAVE_IN, |
69 | GARP_EVENT_R_LEAVE_EMPTY, |
70 | GARP_EVENT_TRANSMIT_PDU, |
71 | __GARP_EVENT_MAX |
72 | }; |
73 | #define GARP_EVENT_MAX (__GARP_EVENT_MAX - 1) |
74 | |
75 | enum garp_action { |
76 | GARP_ACTION_NONE, |
77 | GARP_ACTION_S_JOIN_IN, |
78 | GARP_ACTION_S_LEAVE_EMPTY, |
79 | }; |
80 | |
81 | struct garp_attr { |
82 | struct rb_node node; |
83 | enum garp_applicant_state state; |
84 | u8 type; |
85 | u8 dlen; |
86 | unsigned char data[]; |
87 | }; |
88 | |
89 | enum garp_applications { |
90 | GARP_APPLICATION_GVRP, |
91 | __GARP_APPLICATION_MAX |
92 | }; |
93 | #define GARP_APPLICATION_MAX (__GARP_APPLICATION_MAX - 1) |
94 | |
95 | struct garp_application { |
96 | enum garp_applications type; |
97 | unsigned int maxattr; |
98 | struct stp_proto proto; |
99 | }; |
100 | |
101 | struct garp_applicant { |
102 | struct garp_application *app; |
103 | struct net_device *dev; |
104 | struct timer_list join_timer; |
105 | |
106 | spinlock_t lock; |
107 | struct sk_buff_head queue; |
108 | struct sk_buff *pdu; |
109 | struct rb_root gid; |
110 | struct rcu_head rcu; |
111 | }; |
112 | |
113 | struct garp_port { |
114 | struct garp_applicant __rcu *applicants[GARP_APPLICATION_MAX + 1]; |
115 | struct rcu_head rcu; |
116 | }; |
117 | |
118 | int garp_register_application(struct garp_application *app); |
119 | void garp_unregister_application(struct garp_application *app); |
120 | |
121 | int garp_init_applicant(struct net_device *dev, struct garp_application *app); |
122 | void garp_uninit_applicant(struct net_device *dev, |
123 | struct garp_application *app); |
124 | |
125 | int garp_request_join(const struct net_device *dev, |
126 | const struct garp_application *app, const void *data, |
127 | u8 len, u8 type); |
128 | void garp_request_leave(const struct net_device *dev, |
129 | const struct garp_application *app, |
130 | const void *data, u8 len, u8 type); |
131 | |
132 | #endif /* _NET_GARP_H */ |
133 | |