fc74a9f93a
struct ifnet or the layer 2 common structure it was embedded in have been replaced with a struct ifnet pointer to be filled by a call to the new function, if_alloc(). The layer 2 common structure is also allocated via if_alloc() based on the interface type. It is hung off the new struct ifnet member, if_l2com. This change removes the size of these structures from the kernel ABI and will allow us to better manage them as interfaces come and go. Other changes of note: - Struct arpcom is no longer referenced in normal interface code. Instead the Ethernet address is accessed via the IFP2ENADDR() macro. To enforce this ac_enaddr has been renamed to _ac_enaddr. - The second argument to ether_ifattach is now always the mac address from driver private storage rather than sometimes being ac_enaddr. Reviewed by: sobomax, sam
116 lines
4.6 KiB
C
116 lines
4.6 KiB
C
/*-
|
|
* 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.
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#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_IEEE802 6 /* token-ring hardware format */
|
|
#define ARPHRD_ARCNET 7 /* arcnet hardware format */
|
|
#define ARPHRD_FRELAY 15 /* frame relay hardware format */
|
|
#define ARPHRD_IEEE1394 24 /* firewire 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
|
|
};
|
|
|
|
#define ar_sha(ap) (((caddr_t)((ap)+1)) + 0)
|
|
#define ar_spa(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln)
|
|
#define ar_tha(ap) (((caddr_t)((ap)+1)) + (ap)->ar_hln + (ap)->ar_pln)
|
|
#define ar_tpa(ap) (((caddr_t)((ap)+1)) + 2*(ap)->ar_hln + (ap)->ar_pln)
|
|
|
|
#define arphdr_len2(ar_hln, ar_pln) \
|
|
(sizeof(struct arphdr) + 2*(ar_hln) + 2*(ar_pln))
|
|
#define arphdr_len(ap) (arphdr_len2((ap)->ar_hln, (ap)->ar_pln))
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* Structure shared between the ethernet driver modules and
|
|
* the address resolution code.
|
|
*/
|
|
struct arpcom {
|
|
struct ifnet *ac_ifp; /* network-visible interface */
|
|
u_char _ac_enaddr[6]; /* ethernet hardware address */
|
|
void *ac_netgraph; /* ng_ether(4) netgraph node info */
|
|
};
|
|
#define IFP2AC(ifp) ((struct arpcom *)(ifp->if_l2com))
|
|
#define IFP2ENADDR(ifp) (IFP2AC(ifp)->_ac_enaddr)
|
|
#define AC2IFP(ac) ((ac)->ac_ifp)
|
|
|
|
#endif
|
|
|
|
#endif /* !_NET_IF_ARP_H_ */
|