root/include/net/garp.h

DEFINITIONS

1. garp_cb

#ifndef _NET_GARP_H
#define _NET_GARP_H

#include <net/stp.h>

#define GARP_PROTOCOL_ID        0x1
#define GARP_END_MARK           0x0

struct garp_pdu_hdr {
        __be16  protocol;
};

struct garp_msg_hdr {
        u8      attrtype;
};

enum garp_attr_event {
        GARP_LEAVE_ALL,
        GARP_JOIN_EMPTY,
        GARP_JOIN_IN,
        GARP_LEAVE_EMPTY,
        GARP_LEAVE_IN,
        GARP_EMPTY,
};

struct garp_attr_hdr {
        u8      len;
        u8      event;
        u8      data[];
};

struct garp_skb_cb {
        u8      cur_type;
};

static inline struct garp_skb_cb *garp_cb(struct sk_buff *skb)
{
        BUILD_BUG_ON(sizeof(struct garp_skb_cb) >
                     FIELD_SIZEOF(struct sk_buff, cb));
        return (struct garp_skb_cb *)skb->cb;
}

enum garp_applicant_state {
        GARP_APPLICANT_INVALID,
        GARP_APPLICANT_VA,
        GARP_APPLICANT_AA,
        GARP_APPLICANT_QA,
        GARP_APPLICANT_LA,
        GARP_APPLICANT_VP,
        GARP_APPLICANT_AP,
        GARP_APPLICANT_QP,
        GARP_APPLICANT_VO,
        GARP_APPLICANT_AO,
        GARP_APPLICANT_QO,
        __GARP_APPLICANT_MAX
};
#define GARP_APPLICANT_MAX      (__GARP_APPLICANT_MAX - 1)

enum garp_event {
        GARP_EVENT_REQ_JOIN,
        GARP_EVENT_REQ_LEAVE,
        GARP_EVENT_R_JOIN_IN,
        GARP_EVENT_R_JOIN_EMPTY,
        GARP_EVENT_R_EMPTY,
        GARP_EVENT_R_LEAVE_IN,
        GARP_EVENT_R_LEAVE_EMPTY,
        GARP_EVENT_TRANSMIT_PDU,
        __GARP_EVENT_MAX
};
#define GARP_EVENT_MAX          (__GARP_EVENT_MAX - 1)

enum garp_action {
        GARP_ACTION_NONE,
        GARP_ACTION_S_JOIN_IN,
        GARP_ACTION_S_LEAVE_EMPTY,
};

struct garp_attr {
        struct rb_node                  node;
        enum garp_applicant_state       state;
        u8                              type;
        u8                              dlen;
        unsigned char                   data[];
};

enum garp_applications {
        GARP_APPLICATION_GVRP,
        __GARP_APPLICATION_MAX
};
#define GARP_APPLICATION_MAX    (__GARP_APPLICATION_MAX - 1)

struct garp_application {
        enum garp_applications  type;
        unsigned int            maxattr;
        struct stp_proto        proto;
};

struct garp_applicant {
        struct garp_application *app;
        struct net_device       *dev;
        struct timer_list       join_timer;

        spinlock_t              lock;
        struct sk_buff_head     queue;
        struct sk_buff          *pdu;
        struct rb_root          gid;
        struct rcu_head         rcu;
};

struct garp_port {
        struct garp_applicant __rcu     *applicants[GARP_APPLICATION_MAX + 1];
        struct rcu_head                 rcu;
};

int garp_register_application(struct garp_application *app);
void garp_unregister_application(struct garp_application *app);

int garp_init_applicant(struct net_device *dev, struct garp_application *app);
void garp_uninit_applicant(struct net_device *dev,
                           struct garp_application *app);

int garp_request_join(const struct net_device *dev,
                      const struct garp_application *app, const void *data,
                      u8 len, u8 type);
void garp_request_leave(const struct net_device *dev,
                        const struct garp_application *app,
                        const void *data, u8 len, u8 type);

#endif /* _NET_GARP_H */