1 /* 2 * dhcpcd: BPF arp and bootp filtering 3 * Copyright (c) 2006-2018 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 37 extern const char *bpf_name; 38 size_t bpf_frame_header_len(const struct interface *); 39 int bpf_open(struct interface *, int (*)(struct interface *, int)); 40 int bpf_close(struct interface *, int); 41 int bpf_attach(int, void *, unsigned int); 42 ssize_t bpf_send(const struct interface *, int, uint16_t, const void *, size_t); 43 ssize_t bpf_read(struct interface *, int, void *, size_t, unsigned int *); 44 int bpf_arp(struct interface *, int); 45 int bpf_bootp(struct interface *, int); 46 #endif 47