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Diffstat (limited to 'cpukit/libnetworking/net/if_arp.h')
| -rw-r--r-- | cpukit/libnetworking/net/if_arp.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/cpukit/libnetworking/net/if_arp.h b/cpukit/libnetworking/net/if_arp.h new file mode 100644 index 0000000000..dd726bf856 --- /dev/null +++ b/cpukit/libnetworking/net/if_arp.h @@ -0,0 +1,91 @@ +/* + * Copyright (c) 1986, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)if_arp.h 8.1 (Berkeley) 6/10/93 + * $Id$ + */ + +#ifndef _NET_IF_ARP_H_ +#define _NET_IF_ARP_H_ + +/* + * Address Resolution Protocol. + * + * See RFC 826 for protocol description. ARP packets are variable + * in size; the arphdr structure defines the fixed-length portion. + * Protocol type values are the same as those for 10 Mb/s Ethernet. + * It is followed by the variable-sized fields ar_sha, arp_spa, + * arp_tha and arp_tpa in that order, according to the lengths + * specified. Field names used correspond to RFC 826. + */ +struct arphdr { + u_short ar_hrd; /* format of hardware address */ +#define ARPHRD_ETHER 1 /* ethernet hardware format */ +#define ARPHRD_FRELAY 15 /* frame relay hardware format */ + u_short ar_pro; /* format of protocol address */ + u_char ar_hln; /* length of hardware address */ + u_char ar_pln; /* length of protocol address */ + u_short ar_op; /* one of: */ +#define ARPOP_REQUEST 1 /* request to resolve address */ +#define ARPOP_REPLY 2 /* response to previous request */ +#define ARPOP_REVREQUEST 3 /* request protocol address given hardware */ +#define ARPOP_REVREPLY 4 /* response giving protocol address */ +#define ARPOP_INVREQUEST 8 /* request to identify peer */ +#define ARPOP_INVREPLY 9 /* response identifying peer */ +/* + * The remaining fields are variable in size, + * according to the sizes above. + */ +#ifdef COMMENT_ONLY + u_char ar_sha[]; /* sender hardware address */ + u_char ar_spa[]; /* sender protocol address */ + u_char ar_tha[]; /* target hardware address */ + u_char ar_tpa[]; /* target protocol address */ +#endif +}; + +/* + * ARP ioctl request + */ +struct arpreq { + struct sockaddr arp_pa; /* protocol address */ + struct sockaddr arp_ha; /* hardware address */ + int arp_flags; /* flags */ +}; +/* arp_flags and at_flags field values */ +#define ATF_INUSE 0x01 /* entry in use */ +#define ATF_COM 0x02 /* completed entry (enaddr valid) */ +#define ATF_PERM 0x04 /* permanent entry */ +#define ATF_PUBL 0x08 /* publish entry (respond for other host) */ +#define ATF_USETRAILERS 0x10 /* has requested trailers */ + +#endif /* !_NET_IF_ARP_H_ */ |