LXR linux/include/net/garp.h

   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                     sizeof_field(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