OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [libc/] [ether_addr.c] - Blame information for rev 507

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 30 unneback
/*
2
 * Copyright (c) 1995
3
 *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 * 1. Redistributions of source code must retain the above copyright
9
 *    notice, this list of conditions and the following disclaimer.
10
 * 2. Redistributions in binary form must reproduce the above copyright
11
 *    notice, this list of conditions and the following disclaimer in the
12
 *    documentation and/or other materials provided with the distribution.
13
 * 3. All advertising materials mentioning features or use of this software
14
 *    must display the following acknowledgement:
15
 *      This product includes software developed by Bill Paul.
16
 * 4. Neither the name of the author nor the names of any co-contributors
17
 *    may be used to endorse or promote products derived from this software
18
 *    without specific prior written permission.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
21
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30
 * SUCH DAMAGE.
31
 *
32
 * ethernet address conversion and lookup routines
33
 *
34
 * Written by Bill Paul <wpaul@ctr.columbia.edu>
35
 * Center for Telecommunications Research
36
 * Columbia University, New York City
37
 *
38
 *      $Id: ether_addr.c,v 1.2 2001-09-27 12:01:53 chris Exp $
39
 */
40
 
41
 
42
#include <stdio.h>
43
#include <paths.h>
44
#include <sys/types.h>
45
#include <string.h>
46
#include <stdlib.h>
47
#include <sys/param.h>
48
#include <sys/socket.h>
49
#include <net/ethernet.h>
50
#ifdef YP
51
#include <rpc/rpc.h>
52
#include <rpcsvc/yp_prot.h>
53
#include <rpcsvc/ypclnt.h>
54
#endif
55
 
56
#ifndef _PATH_ETHERS
57
#define _PATH_ETHERS "/etc/ethers"
58
#endif
59
 
60
/*
61
 * Parse a string of text containing an ethernet address and hostname
62
 * and separate it into its component parts.
63
 */
64
int ether_line(l, e, hostname)
65
        char *l;
66
        struct ether_addr *e;
67
        char *hostname;
68
{
69
        int i, o[6];
70
 
71
        i = sscanf(l, "%x:%x:%x:%x:%x:%x %s", &o[0], &o[1], &o[2],
72
                                              &o[3], &o[4], &o[5],
73
                                              hostname);
74
        if (i != 7)
75
                return (i);
76
 
77
        for (i=0; i<6; i++)
78
                e->octet[i] = o[i];
79
        return (0);
80
}
81
 
82
/*
83
 * Convert an ASCII representation of an ethernet address to
84
 * binary form.
85
 */
86
struct ether_addr *ether_aton(a)
87
        char *a;
88
{
89
        int i;
90
        static struct ether_addr o;
91
        unsigned int o0, o1, o2, o3, o4, o5;
92
 
93
        i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o0, &o1, &o2, &o3, &o4, &o5);
94
 
95
        if (i != 6)
96
                return (NULL);
97
 
98
        o.octet[0]=o0;
99
        o.octet[1]=o1;
100
        o.octet[2]=o2;
101
        o.octet[3]=o3;
102
        o.octet[4]=o4;
103
        o.octet[5]=o5;
104
 
105
        return ((struct ether_addr *)&o);
106
}
107
 
108
/*
109
 * Convert a binary representation of an ethernet address to
110
 * an ASCII string.
111
 */
112
char *ether_ntoa(n)
113
        struct ether_addr *n;
114
{
115
        int i;
116
        static char a[18];
117
 
118
        i = sprintf(a,"%x:%x:%x:%x:%x:%x",n->octet[0],n->octet[1],n->octet[2],
119
                                          n->octet[3],n->octet[4],n->octet[5]);
120
        if (i < 11)
121
                return (NULL);
122
        return ((char *)&a);
123
}
124
 
125
/*
126
 * Map an ethernet address to a hostname. Use either /etc/ethers or
127
 * NIS/YP.
128
 */
129
 
130
int ether_ntohost(hostname, e)
131
        char *hostname;
132
        struct ether_addr *e;
133
{
134
        FILE *fp;
135
        char buf[BUFSIZ + 2];
136
        struct ether_addr local_ether;
137
        char local_host[MAXHOSTNAMELEN];
138
#ifdef YP
139
        char *result;
140
        int resultlen;
141
        char *ether_a;
142
        char *yp_domain;
143
#endif
144
        if ((fp = fopen(_PATH_ETHERS, "r")) == NULL)
145
                return (1);
146
 
147
        while (fgets(buf,BUFSIZ,fp)) {
148
                if (buf[0] == '#')
149
                        continue;
150
#ifdef YP
151
                if (buf[0] == '+') {
152
                        if (yp_get_default_domain(&yp_domain))
153
                                continue;
154
                        ether_a = ether_ntoa(e);
155
                        if (yp_match(yp_domain, "ethers.byaddr", ether_a,
156
                                strlen(ether_a), &result, &resultlen)) {
157
                                continue;
158
                        }
159
                        strncpy(buf, result, resultlen);
160
                        buf[resultlen] = '\0';
161
                        free(result);
162
                }
163
#endif
164
                if (!ether_line(buf, &local_ether, local_host)) {
165
                        if (!bcmp((char *)&local_ether.octet[0],
166
                                (char *)&e->octet[0], 6)) {
167
                        /* We have a match */
168
                                strcpy(hostname, local_host);
169
                                fclose(fp);
170
                                return(0);
171
                        }
172
                }
173
        }
174
        fclose(fp);
175
        return (1);
176
}
177
 
178
/*
179
 * Map a hostname to an ethernet address using /etc/ethers or
180
 * NIS/YP.
181
 */
182
int ether_hostton(hostname, e)
183
        char *hostname;
184
        struct ether_addr *e;
185
{
186
        FILE *fp;
187
        char buf[BUFSIZ + 2];
188
        struct ether_addr local_ether;
189
        char local_host[MAXHOSTNAMELEN];
190
#ifdef YP
191
        char *result;
192
        int resultlen;
193
        char *yp_domain;
194
#endif
195
        if ((fp = fopen(_PATH_ETHERS, "r")) == NULL)
196
                return (1);
197
 
198
        while (fgets(buf,BUFSIZ,fp)) {
199
                if (buf[0] == '#')
200
                        continue;
201
#ifdef YP
202
                if (buf[0] == '+') {
203
                        if (yp_get_default_domain(&yp_domain))
204
                                continue;
205
                        if (yp_match(yp_domain, "ethers.byname", hostname,
206
                                strlen(hostname), &result, &resultlen)) {
207
                                continue;
208
                        }
209
                        strncpy(buf, result, resultlen);
210
                        buf[resultlen] = '\0';
211
                        free(result);
212
                }
213
#endif
214
                if (!ether_line(buf, &local_ether, local_host)) {
215
                        if (!strcmp(hostname, local_host)) {
216
                                /* We have a match */
217
                                bcopy((char *)&local_ether.octet[0],
218
                                        (char *)&e->octet[0], 6);
219
                                fclose(fp);
220
                                return(0);
221
                        }
222
                }
223
        }
224
        fclose(fp);
225
        return (1);
226
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.