1 /* $NetBSD: ether.c,v 1.11 1997/07/07 15:52:50 drochner Exp $ */
4 * Copyright (c) 1992 Regents of the University of California.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <netinet/if_ether.h>
48 #include <netinet/in_systm.h>
49 #include <netinet/ip.h>
55 /* Caller must leave room for ethernet header in front!! */
57 sendether(struct iodesc *d, void *pkt, size_t len, uint8_t *dea, int etype)
60 struct ether_header *eh;
64 printf("sendether: called\n");
67 eh = (struct ether_header *)pkt - 1;
70 MACPY(d->myea, eh->ether_shost); /* by byte */
71 MACPY(dea, eh->ether_dhost); /* by byte */
72 eh->ether_type = htons(etype);
74 n = netif_put(d, eh, len);
75 if (n == -1 || n < sizeof(*eh))
83 * Get a packet of any Ethernet type, with our address or
84 * the broadcast address. Save the Ether type in etype.
85 * Unless there is an error, we pass the whole packet and the unencapsulated
89 readether(struct iodesc *d, void **pkt, void **payload, time_t tleft,
93 struct ether_header *eh;
98 printf("readether: called\n");
102 n = netif_get(d, &ptr, tleft);
103 if (n == -1 || n < sizeof(*eh)) {
108 eh = (struct ether_header *)((uintptr_t)ptr + ETHER_ALIGN);
109 /* Validate Ethernet address. */
110 if (bcmp(d->myea, eh->ether_dhost, 6) != 0 &&
111 bcmp(bcea, eh->ether_dhost, 6) != 0) {
114 printf("readether: not ours (ea=%s)\n",
115 ether_sprintf(eh->ether_dhost));
122 *payload = (void *)((uintptr_t)eh + sizeof(*eh));
123 *etype = ntohs(eh->ether_type);
130 * Convert Ethernet address to printable (loggable) representation.
132 static char digits[] = "0123456789abcdef";
134 ether_sprintf(u_char *ap)
137 static char etherbuf[18];
140 for (i = 0; i < 6; i++) {
141 *cp++ = digits[*ap >> 4];
142 *cp++ = digits[*ap++ & 0xf];