LCOM1920-T02G10

#ifndef _MINIX_BPF_H

#define _MINIX_BPF_H

#include <net/bpf.h>

/*

 * MINIX3-specific extensions to the NetBSD Berkeley Packet Filter header.

 * These extensions are necessary because NetBSD BPF uses a few ioctl(2)

 * structure formats that contain pointers--something that MINIX3 has to avoid,

 * due to its memory granting mechanisms.  Thus, those ioctl(2) calls have to

 * be converted from NetBSD to MINIX3 format.  We currently do that in libc.

 * This header specifies the numbers and formats for the MINIX3 versions.

 *

 * See <minix/if.h> for details on how things work here.

 */

/* BIOCSETF: set BPF filter program. */

/*

 * This ioctl is an exception, as it is write-only, so we do not need the

 * original structure.  Also, the size of this structure is currently slightly

 * over 4KB, which makes it too big for a regular ioctl call.  Thus, we have to

 * use a big ioctl call.  Note that future changes of BPF_MAXINSNS will

 * unfortunately (necessarily) change the ioctl call number.

 */

struct minix_bpf_program {

        u_int mbf_len;

        struct bpf_insn mbf_insns[BPF_MAXINSNS];

};

#define MINIX_BIOCSETF                _IOW_BIG(2, struct minix_bpf_program)

/* BIOCGDLTLIST: retrieve list of possible data link types. */

#define MINIX_BPF_MAXDLT        256

struct minix_bpf_dltlist {

        struct bpf_dltlist mbfl_dltlist;                /* MUST be first */

        u_int mbfl_list[MINIX_BPF_MAXDLT];

};

#define MINIX_BIOCGDLTLIST        _IOWR('B', 119, struct minix_bpf_dltlist)

#endif /* !_MINIX_BPF_H */