Use CSTD and remove local CSTD settings which are no longer needed.
[dragonfly.git] / lib / libstand / ether.c
CommitLineData
984263bc 1/* $NetBSD: ether.c,v 1.11 1997/07/07 15:52:50 drochner Exp $ */
ff2aef30 2/* $DragonFly: src/lib/libstand/ether.c,v 1.3 2005/12/11 02:27:26 swildner Exp $ */
984263bc
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3
4/*
5 * Copyright (c) 1992 Regents of the University of California.
6 * All rights reserved.
7 *
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.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
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. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Lawrence Berkeley Laboratory and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#) Header: net.c,v 1.9 93/08/06 19:32:15 leres Exp (LBL)
41 */
42
43#include <sys/param.h>
44#include <sys/socket.h>
45#include <string.h>
46
47#include <net/if.h>
48#include <netinet/in.h>
49#include <netinet/if_ether.h>
50#include <netinet/in_systm.h>
51#include <netinet/ip.h>
52
53#include "stand.h"
54#include "net.h"
55#include "netif.h"
56
57/* Caller must leave room for ethernet header in front!! */
58ssize_t
ff2aef30 59sendether(struct iodesc *d, void *pkt, size_t len, u_char *dea, int etype)
984263bc 60{
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61 ssize_t n;
62 struct ether_header *eh;
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63
64#ifdef ETHER_DEBUG
65 if (debug)
66 printf("sendether: called\n");
67#endif
68
69 eh = (struct ether_header *)pkt - 1;
70 len += sizeof(*eh);
71
72 MACPY(d->myea, eh->ether_shost); /* by byte */
73 MACPY(dea, eh->ether_dhost); /* by byte */
74 eh->ether_type = htons(etype);
75
76 n = netif_put(d, eh, len);
77 if (n == -1 || n < sizeof(*eh))
78 return (-1);
79
80 n -= sizeof(*eh);
81 return (n);
82}
83
84/*
85 * Get a packet of any Ethernet type, with our address or
86 * the broadcast address. Save the Ether type in arg 5.
87 * NOTE: Caller must leave room for the Ether header.
88 */
89ssize_t
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90readether(struct iodesc *d, void *pkt, size_t len, time_t tleft,
91 u_int16_t *etype)
984263bc 92{
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93 ssize_t n;
94 struct ether_header *eh;
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95
96#ifdef ETHER_DEBUG
97 if (debug)
98 printf("readether: called\n");
99#endif
100
101 eh = (struct ether_header *)pkt - 1;
102 len += sizeof(*eh);
103
104 n = netif_get(d, eh, len, tleft);
105 if (n == -1 || n < sizeof(*eh))
106 return (-1);
107
108 /* Validate Ethernet address. */
109 if (bcmp(d->myea, eh->ether_dhost, 6) != 0 &&
110 bcmp(bcea, eh->ether_dhost, 6) != 0) {
111#ifdef ETHER_DEBUG
112 if (debug)
113 printf("readether: not ours (ea=%s)\n",
114 ether_sprintf(eh->ether_dhost));
115#endif
116 return (-1);
117 }
118 *etype = ntohs(eh->ether_type);
119
120 n -= sizeof(*eh);
121 return (n);
122}
123
124/*
125 * Convert Ethernet address to printable (loggable) representation.
126 */
127static char digits[] = "0123456789abcdef";
128char *
ff2aef30 129ether_sprintf(u_char *ap)
984263bc 130{
660c873b 131 int i;
984263bc 132 static char etherbuf[18];
660c873b 133 char *cp = etherbuf;
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134
135 for (i = 0; i < 6; i++) {
136 *cp++ = digits[*ap >> 4];
137 *cp++ = digits[*ap++ & 0xf];
138 *cp++ = ':';
139 }
140 *--cp = 0;
141 return (etherbuf);
142}