atmbr2684.h

Go to the documentation of this file.

#ifndef _LINUX_ATMBR2684_H
#define _LINUX_ATMBR2684_H

#include <linux/types.h>
#include <linux/atm.h>
#include <linux/if.h>       /* For IFNAMSIZ */

/*
 * Type of media we're bridging (ethernet, token ring, etc)  Currently only
 * ethernet is supported
 */
#define BR2684_MEDIA_ETHERNET   (0) /* 802.3 */
#define BR2684_MEDIA_802_4  (1) /* 802.4 */
#define BR2684_MEDIA_TR     (2) /* 802.5 - token ring */
#define BR2684_MEDIA_FDDI   (3)
#define BR2684_MEDIA_802_6  (4) /* 802.6 */

                    /* used only at device creation:  */
#define BR2684_FLAG_ROUTED  (1<<16) /* payload is routed, not bridged */

/*
 * Is there FCS inbound on this VC?  This currently isn't supported.
 */
#define BR2684_FCSIN_NO     (0)
#define BR2684_FCSIN_IGNORE (1)
#define BR2684_FCSIN_VERIFY (2)

/*
 * Is there FCS outbound on this VC?  This currently isn't supported.
 */
#define BR2684_FCSOUT_NO    (0)
#define BR2684_FCSOUT_SENDZERO  (1)
#define BR2684_FCSOUT_GENERATE  (2)

/*
 * Does this VC include LLC encapsulation?
 */
#define BR2684_ENCAPS_VC    (0) /* VC-mux */
#define BR2684_ENCAPS_LLC   (1)
#define BR2684_ENCAPS_AUTODETECT (2)    /* Unsuported */

/*
 * Is this VC bridged or routed?
 */

#define BR2684_PAYLOAD_ROUTED   (0)
#define BR2684_PAYLOAD_BRIDGED  (1)

/*
 * This is for the ATM_NEWBACKENDIF call - these are like socket families:
 * the first element of the structure is the backend number and the rest
 * is per-backend specific
 */
struct atm_newif_br2684 {
    atm_backend_t backend_num;  /* ATM_BACKEND_BR2684 */
    int media;      /* BR2684_MEDIA_*, flags in upper bits */
    char ifname[IFNAMSIZ];
    int mtu;
};

/*
 * This structure is used to specify a br2684 interface - either by a
 * positive integer (returned by ATM_NEWBACKENDIF) or the interfaces name
 */
#define BR2684_FIND_BYNOTHING   (0)
#define BR2684_FIND_BYNUM   (1)
#define BR2684_FIND_BYIFNAME    (2)
struct br2684_if_spec {
    int method;     /* BR2684_FIND_* */
    union {
        char ifname[IFNAMSIZ];
        int devnum;
    } spec;
};

/*
 * This is for the ATM_SETBACKEND call - these are like socket families:
 * the first element of the structure is the backend number and the rest
 * is per-backend specific
 */
struct atm_backend_br2684 {
    atm_backend_t backend_num;  /* ATM_BACKEND_BR2684 */
    struct br2684_if_spec ifspec;
    int fcs_in;     /* BR2684_FCSIN_* */
    int fcs_out;        /* BR2684_FCSOUT_* */
    int fcs_auto;       /* 1: fcs_{in,out} disabled if no FCS rx'ed */
    int encaps;     /* BR2684_ENCAPS_* */
    int has_vpiid;      /* 1: use vpn_id - Unsupported */
    __u8 vpn_id[7];
    int send_padding;   /* unsupported */
    int min_size;       /* we will pad smaller packets than this */
};

/*
 * The BR2684_SETFILT ioctl is an experimental mechanism for folks
 * terminating a large number of IP-only vcc's.  When netfilter allows
 * efficient per-if in/out filters, this support will be removed
 */
struct br2684_filter {
    __be32 prefix;      /* network byte order */
    __be32 netmask;     /* 0 = disable filter */
};

struct br2684_filter_set {
    struct br2684_if_spec ifspec;
    struct br2684_filter filter;
};

enum br2684_payload {
    p_routed = BR2684_PAYLOAD_ROUTED,
    p_bridged = BR2684_PAYLOAD_BRIDGED,
};

#define BR2684_SETFILT  _IOW( 'a', ATMIOC_BACKEND + 0, \
                struct br2684_filter_set)

#endif /* _LINUX_ATMBR2684_H */