207 |
mateuszvis |
1 |
/*!\file inc/netinet/if_ether.h
|
|
|
2 |
* Ethernet definitions.
|
|
|
3 |
*/
|
|
|
4 |
|
|
|
5 |
/* Modified for emx by hv 1994
|
|
|
6 |
*
|
|
|
7 |
* Copyright (c) 1982, 1986 Regents of the University of California.
|
|
|
8 |
* All rights reserved.
|
|
|
9 |
*
|
|
|
10 |
* Redistribution and use in source and binary forms, with or without
|
|
|
11 |
* modification, are permitted provided that the following conditions
|
|
|
12 |
* are met:
|
|
|
13 |
* 1. Redistributions of source code must retain the above copyright
|
|
|
14 |
* notice, this list of conditions and the following disclaimer.
|
|
|
15 |
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
16 |
* notice, this list of conditions and the following disclaimer in the
|
|
|
17 |
* documentation and/or other materials provided with the distribution.
|
|
|
18 |
* 3. All advertising materials mentioning features or use of this software
|
|
|
19 |
* must display the following acknowledgement:
|
|
|
20 |
* This product includes software developed by the University of
|
|
|
21 |
* California, Berkeley and its contributors.
|
|
|
22 |
* 4. Neither the name of the University nor the names of its contributors
|
|
|
23 |
* may be used to endorse or promote products derived from this software
|
|
|
24 |
* without specific prior written permission.
|
|
|
25 |
*
|
|
|
26 |
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
|
27 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
28 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
29 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
|
30 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
31 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
32 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
33 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
34 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
35 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
36 |
* SUCH DAMAGE.
|
|
|
37 |
*
|
|
|
38 |
* from: @(#)if_ether.h 7.5 (Berkeley) 6/28/90
|
|
|
39 |
* $Id: if_ether.h,v 1.8 1994/02/02 05:58:54 hpeyerl Exp $
|
|
|
40 |
*/
|
|
|
41 |
|
|
|
42 |
#ifndef __NETINET_IF_ETHER_H
|
|
|
43 |
#define __NETINET_IF_ETHER_H
|
|
|
44 |
|
|
|
45 |
#include <sys/packon.h>
|
|
|
46 |
|
|
|
47 |
/*
|
|
|
48 |
* Ethernet address - 6 octets
|
|
|
49 |
* this is only used by the ethers(3) functions.
|
|
|
50 |
*/
|
|
|
51 |
struct ether_addr {
|
|
|
52 |
u_char ether_addr_octet[6];
|
|
|
53 |
};
|
|
|
54 |
|
|
|
55 |
/*
|
|
|
56 |
* Structure of a 10Mb/s Ethernet header.
|
|
|
57 |
*/
|
|
|
58 |
struct ether_header {
|
|
|
59 |
u_char ether_dhost[6];
|
|
|
60 |
u_char ether_shost[6];
|
|
|
61 |
u_short ether_type;
|
|
|
62 |
};
|
|
|
63 |
|
|
|
64 |
#define ETHERTYPE_PUP 0x0200 /* PUP protocol */
|
|
|
65 |
/* the IBM header corrects the following to 0x608 for OS/2 but I believe
|
|
|
66 |
* this is just a dirty hack
|
|
|
67 |
*/
|
|
|
68 |
#define ETHERTYPE_ARP 0x0806 /* address resolution protocol */
|
|
|
69 |
#define ETHERTYPE_IP 0x0800 /* IP protocol */
|
|
|
70 |
#define ETHERTYPE_REVARP 0x8035 /* reverse addr resolution protocol */
|
|
|
71 |
|
|
|
72 |
/*
|
|
|
73 |
* The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
|
|
|
74 |
* (type-ETHERTYPE_TRAIL)*512 bytes of data followed
|
|
|
75 |
* by an ETHER type (as given above) and then the (variable-length) header.
|
|
|
76 |
*/
|
|
|
77 |
#define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */
|
|
|
78 |
#define ETHERTYPE_NTRAILER 16
|
|
|
79 |
|
|
|
80 |
#define ETHERMTU 1500
|
|
|
81 |
#define ETHERMIN (60-14)
|
|
|
82 |
|
|
|
83 |
/*
|
|
|
84 |
* Macro to map an IP multicast address to an Ethernet multicast address.
|
|
|
85 |
* The high-order 25 bits of the Ethernet address are statically assigned,
|
|
|
86 |
* and the low-order 23 bits are taken from the low end of the IP address.
|
|
|
87 |
*/
|
|
|
88 |
#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
|
|
|
89 |
/* struct in_addr *ipaddr; */ \
|
|
|
90 |
/* u_char enaddr[6]; */ \
|
|
|
91 |
{ \
|
|
|
92 |
(enaddr)[0] = 0x01; \
|
|
|
93 |
(enaddr)[1] = 0x00; \
|
|
|
94 |
(enaddr)[2] = 0x5e; \
|
|
|
95 |
(enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
|
|
|
96 |
(enaddr)[4] = ((u_char *)ipaddr)[2]; \
|
|
|
97 |
(enaddr)[5] = ((u_char *)ipaddr)[3]; \
|
|
|
98 |
}
|
|
|
99 |
|
|
|
100 |
|
|
|
101 |
/*
|
|
|
102 |
* Ethernet Address Resolution Protocol.
|
|
|
103 |
*
|
|
|
104 |
* See RFC 826 for protocol description. Structure below is adapted
|
|
|
105 |
* to resolving internet addresses. Field names used correspond to
|
|
|
106 |
* RFC 826.
|
|
|
107 |
*/
|
|
|
108 |
struct ether_arp {
|
|
|
109 |
struct arphdr ea_hdr; /* fixed-size header */
|
|
|
110 |
u_char arp_sha[6]; /* sender hardware address */
|
|
|
111 |
u_char arp_spa[4]; /* sender protocol address */
|
|
|
112 |
u_char arp_tha[6]; /* target hardware address */
|
|
|
113 |
u_char arp_tpa[4]; /* target protocol address */
|
|
|
114 |
};
|
|
|
115 |
#define arp_hrd ea_hdr.ar_hrd
|
|
|
116 |
#define arp_pro ea_hdr.ar_pro
|
|
|
117 |
#define arp_hln ea_hdr.ar_hln
|
|
|
118 |
#define arp_pln ea_hdr.ar_pln
|
|
|
119 |
#define arp_op ea_hdr.ar_op
|
|
|
120 |
|
|
|
121 |
|
|
|
122 |
/*
|
|
|
123 |
* Structure shared between the ethernet driver modules and
|
|
|
124 |
* the address resolution code. For example, each ec_softc or il_softc
|
|
|
125 |
* begins with this structure.
|
|
|
126 |
*/
|
|
|
127 |
struct arpcom {
|
|
|
128 |
struct ifnet ac_if; /* network-visible interface */
|
|
|
129 |
u_char ac_enaddr[6]; /* ethernet hardware address */
|
|
|
130 |
struct in_addr ac_ipaddr; /* copy of ip address- XXX */
|
|
|
131 |
struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
|
|
|
132 |
int ac_multicnt; /* length of ac_multiaddrs list */
|
|
|
133 |
};
|
|
|
134 |
|
|
|
135 |
/*
|
|
|
136 |
* Internet to ethernet address resolution table.
|
|
|
137 |
*/
|
|
|
138 |
|
|
|
139 |
struct arptab {
|
|
|
140 |
struct in_addr at_iaddr; /* internet address */
|
|
|
141 |
u_char at_enaddr[6]; /* ethernet address */
|
|
|
142 |
u_char at_timer; /* minutes since last reference */
|
|
|
143 |
u_char at_flags; /* flags */
|
|
|
144 |
struct mbuf *at_hold; /* last packet until resolved/timeout */
|
|
|
145 |
/* only os2 */
|
|
|
146 |
u_short at_rcf;
|
|
|
147 |
u_short at_rseg[8];
|
|
|
148 |
u_long at_millisec;
|
|
|
149 |
int at_interface;
|
|
|
150 |
};
|
|
|
151 |
|
|
|
152 |
|
|
|
153 |
extern u_char etherbroadcastaddr[6];
|
|
|
154 |
extern u_char ether_ipmulticast_min[6];
|
|
|
155 |
extern u_char ether_ipmulticast_max[6];
|
|
|
156 |
|
|
|
157 |
/*
|
|
|
158 |
* Ethernet multicast address structure. There is one of these for each
|
|
|
159 |
* multicast address or range of multicast addresses that we are supposed
|
|
|
160 |
* to listen to on a particular interface. They are kept in a linked list,
|
|
|
161 |
* rooted in the interface's arpcom structure. (This really has nothing to
|
|
|
162 |
* do with ARP, or with the Internet address family, but this appears to be
|
|
|
163 |
* the minimally-disrupting place to put it.)
|
|
|
164 |
*/
|
|
|
165 |
struct ether_multi {
|
|
|
166 |
u_char enm_addrlo[6]; /* low or only address of range */
|
|
|
167 |
u_char enm_addrhi[6]; /* high or only address of range */
|
|
|
168 |
struct arpcom *enm_ac; /* back pointer to arpcom */
|
|
|
169 |
u_int enm_refcount; /* no. claims to this addr/range */
|
|
|
170 |
struct ether_multi *enm_next; /* ptr to next ether_multi */
|
|
|
171 |
};
|
|
|
172 |
|
|
|
173 |
/*
|
|
|
174 |
* Structure used by macros below to remember position when stepping through
|
|
|
175 |
* all of the ether_multi records.
|
|
|
176 |
*/
|
|
|
177 |
struct ether_multistep {
|
|
|
178 |
struct ether_multi *e_enm;
|
|
|
179 |
};
|
|
|
180 |
|
|
|
181 |
#include <sys/packoff.h>
|
|
|
182 |
|
|
|
183 |
/*
|
|
|
184 |
* Macro for looking up the ether_multi record for a given range of Ethernet
|
|
|
185 |
* multicast addresses connected to a given arpcom structure. If no matching
|
|
|
186 |
* record is found, "enm" returns NULL.
|
|
|
187 |
*/
|
|
|
188 |
#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
|
|
|
189 |
/* u_char addrlo[6]; */ \
|
|
|
190 |
/* u_char addrhi[6]; */ \
|
|
|
191 |
/* struct arpcom *ac; */ \
|
|
|
192 |
/* struct ether_multi *enm; */ \
|
|
|
193 |
{ \
|
|
|
194 |
for ((enm) = (ac)->ac_multiaddrs; \
|
|
|
195 |
(enm) != NULL && \
|
|
|
196 |
(bcmp((enm)->enm_addrlo, (addrlo), 6) != 0 || \
|
|
|
197 |
bcmp((enm)->enm_addrhi, (addrhi), 6) != 0); \
|
|
|
198 |
(enm) = (enm)->enm_next); \
|
|
|
199 |
}
|
|
|
200 |
|
|
|
201 |
/*
|
|
|
202 |
* Macro to step through all of the ether_multi records, one at a time.
|
|
|
203 |
* The current position is remembered in "step", which the caller must
|
|
|
204 |
* provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
|
|
|
205 |
* and get the first record. Both macros return a NULL "enm" when there
|
|
|
206 |
* are no remaining records.
|
|
|
207 |
*/
|
|
|
208 |
#define ETHER_NEXT_MULTI(step, enm) \
|
|
|
209 |
/* struct ether_multistep step; */ \
|
|
|
210 |
/* struct ether_multi *enm; */ \
|
|
|
211 |
{ \
|
|
|
212 |
if (((enm) = (step).e_enm) != NULL) \
|
|
|
213 |
(step).e_enm = (enm)->enm_next; \
|
|
|
214 |
}
|
|
|
215 |
|
|
|
216 |
#define ETHER_FIRST_MULTI(step, ac, enm) \
|
|
|
217 |
/* struct ether_multistep step; */ \
|
|
|
218 |
/* struct arpcom *ac; */ \
|
|
|
219 |
/* struct ether_multi *enm; */ \
|
|
|
220 |
{ \
|
|
|
221 |
(step).e_enm = (ac)->ac_multiaddrs; \
|
|
|
222 |
ETHER_NEXT_MULTI((step), (enm)); \
|
|
|
223 |
}
|
|
|
224 |
|
|
|
225 |
#endif
|