1 /* $NetBSD: ether.c,v 1.11 1997/07/07 15:52:50 drochner Exp $ */
2 /* $DragonFly: src/lib/libstand/ether.c,v 1.3 2005/12/11 02:27:26 swildner Exp $ */
5 * Copyright (c) 1992 Regents of the University of California.
8 * This software was developed by the Computer Systems Engineering group
9 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
10 * contributed to Berkeley.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
39 #include <sys/param.h>
40 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <netinet/if_ether.h>
46 #include <netinet/in_systm.h>
47 #include <netinet/ip.h>
53 /* Caller must leave room for ethernet header in front!! */
55 sendether(struct iodesc
*d
, void *pkt
, size_t len
, u_char
*dea
, int etype
)
58 struct ether_header
*eh
;
62 printf("sendether: called\n");
65 eh
= (struct ether_header
*)pkt
- 1;
68 MACPY(d
->myea
, eh
->ether_shost
); /* by byte */
69 MACPY(dea
, eh
->ether_dhost
); /* by byte */
70 eh
->ether_type
= htons(etype
);
72 n
= netif_put(d
, eh
, len
);
73 if (n
== -1 || n
< sizeof(*eh
))
81 * Get a packet of any Ethernet type, with our address or
82 * the broadcast address. Save the Ether type in arg 5.
83 * NOTE: Caller must leave room for the Ether header.
86 readether(struct iodesc
*d
, void *pkt
, size_t len
, time_t tleft
,
90 struct ether_header
*eh
;
94 printf("readether: called\n");
97 eh
= (struct ether_header
*)pkt
- 1;
100 n
= netif_get(d
, eh
, len
, tleft
);
101 if (n
== -1 || n
< sizeof(*eh
))
104 /* Validate Ethernet address. */
105 if (bcmp(d
->myea
, eh
->ether_dhost
, ETHER_ADDR_LEN
) != 0 &&
106 bcmp(bcea
, eh
->ether_dhost
, ETHER_ADDR_LEN
) != 0) {
109 printf("readether: not ours (ea=%s)\n",
110 ether_sprintf(eh
->ether_dhost
));
114 *etype
= ntohs(eh
->ether_type
);
121 * Convert Ethernet address to printable (loggable) representation.
123 static char digits
[] = "0123456789abcdef";
125 ether_sprintf(u_char
*ap
)
128 static char etherbuf
[3 * ETHER_ADDR_LEN
];
131 for (i
= 0; i
< ETHER_ADDR_LEN
; i
++) {
132 *cp
++ = digits
[*ap
>> 4];
133 *cp
++ = digits
[*ap
++ & 0xf];