1/*
2 * dhcpcd: BPF arp and bootp filtering
3 * Copyright (c) 2006-2019 Roy Marples <roy@marples.name>
4 * All rights reserved
5
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#ifndef BPF_HEADER
29#define BPF_HEADER
30
31#define BPF_READING (1U << 0)
32#define BPF_EOF (1U << 1)
33#define BPF_PARTIALCSUM (1U << 2)
34
35#include "dhcpcd.h"
36
37extern const char *bpf_name;
38size_t bpf_frame_header_len(const struct interface *);
39int bpf_open(struct interface *, int (*)(struct interface *, int));
40int bpf_close(struct interface *, int);
41int bpf_attach(int, void *, unsigned int);
42ssize_t bpf_send(const struct interface *, int, uint16_t, const void *, size_t);
43ssize_t bpf_read(struct interface *, int, void *, size_t, unsigned int *);
44int bpf_arp(struct interface *, int);
45int bpf_bootp(struct interface *, int);
46#endif
47