stdethers.tproj/stdethers.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*      $OpenBSD: stdethers.c,v 1.3 1997/09/11 19:47:33 deraadt Exp $ */
  24
  25 /*
  26  * Copyright (c) 1995 Mats O Jansson <moj@stacken.kth.se>
  27  * All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by Mats O Jansson
  40  * 4. The name of the author may not be used to endorse or promote products
  41  *    derived from this software without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  44  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  45  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  47  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  */
  55
  56 #ifndef LINT
  57 static char rcsid[] = "$OpenBSD: stdethers.c,v 1.3 1997/09/11 19:47:33 deraadt Exp $";
  58 #endif
  59
  60 #include <sys/types.h>
  61 #include <sys/socket.h>
  62 #include <net/if.h>
  63 #include <netinet/in.h>
  64 #include <netinet/if_ether.h>
  65 #include <stdio.h>
  66 #include <string.h>
  67 #include <ctype.h>
  68
  69 char *ProgramName = "stdethers";
  70
  71 #ifndef NTOA_FIX
  72 #define NTOA(x) (char *)ether_ntoa(x)
  73 #else
  74 #define NTOA(x) (char *) working_ntoa((u_char *) x)
  75
  76 /* As of 1995-12-02 NetBSD and OpenBSD has an SunOS 4 incompatible ether_ntoa.
  77    The code in usr/lib/libc/net/ethers seems to do the correct thing
  78    when asking YP but not when returning string from ether_ntoa.
  79  */
  80
  81 char *
  82 working_ntoa(e)
  83         u_char  *e;
  84 {
  85         static char a[] = "xx:xx:xx:xx:xx:xx";
  86
  87         sprintf(a, "%x:%x:%x:%x:%x:%x",
  88                 e[0], e[1], e[2], e[3], e[4], e[5]);
  89         return a;
  90 }
  91 #endif
  92
  93 static int read_line(fp, buf, size)
  94 FILE *fp;
  95 char *buf;
  96 int size;
  97 {
  98         int done = 0;
  99
 100         do {
 101                 while (fgets(buf, size, fp)) {
 102                         int len = strlen(buf);
 103                         done += len;
 104                         if (len > 1 && buf[len-2] == '\\' &&
 105                                         buf[len-1] == '\n') {
 106                                 int ch;
 107                                 buf += len - 2;
 108                                 size -= len - 2;
 109                                 *buf = '\n'; buf[1] = '\0';
 110                                 /*
 111                                  * Skip leading white space on next line
 112                                  */
 113                                 while ((ch = getc(fp)) != EOF &&
 114                                         isascii(ch) && isspace(ch))
 115                                                 ;
 116                                 (void) ungetc(ch, fp);
 117                         } else {
 118                                 return done;
 119                         }
 120                 }
 121         } while (size > 0 && !feof(fp));
 122
 123         return done;
 124 }
 125
 126 int
 127 main (argc,argv)
 128 int argc;
 129 char *argv[];
 130 {
 131         FILE    *data_file;
 132         char     data_line[1024];
 133         int      usage = 0;
 134         int      line_no = 0;
 135         int      len;
 136         char    *p,*k,*v;
 137         struct ether_addr eth_addr;
 138         char     hostname[256];
 139
 140         if (argc > 2) {
 141                 usage++;
 142         }
 143
 144         if (usage) {
 145                 fprintf(stderr,
 146                         "usage: %s [file]\n",
 147                         ProgramName);
 148                 exit(1);
 149         }
 150
 151         if (argc == 2) {
 152                 data_file = fopen(argv[1], "r");
 153                 if (data_file == NULL) {
 154                         fprintf(stderr,
 155                                 "%s: can't open %s\n",
 156                                 ProgramName,
 157                                 argv[1]);
 158                         exit(1);
 159                 }
 160         } else {
 161                 data_file = stdin;
 162         }
 163
 164         while (read_line(data_file,data_line,sizeof(data_line))) {
 165
 166                 line_no++;
 167                 len = strlen(data_line);
 168
 169                 if (len > 0) {
 170                         if (data_line[0] == '#')
 171                                 continue;
 172                 }
 173
 174                 /*
 175                  * Check if we have the whole line
 176                  */
 177
 178                 if (data_line[len-1] != '\n') {
 179                         if (argc == 2) {
 180                                 fprintf(stderr,
 181                                         "line %d in \"%s\" is too long",
 182                                         line_no, argv[1]);
 183                         } else {
 184                                 fprintf(stderr,
 185                                         "line %d in \"stdin\" is too long",
 186                                         line_no);
 187                         }
 188                 } else {
 189                         data_line[len-1] = '\0';
 190                 }
 191
 192                 p = (char *) &data_line;
 193
 194                 k  = p;                         /* save start of key */
 195                 while (!isspace(*p)) { p++; };  /* find first "space" */
 196                 while (isspace(*p)) { p++; };   /* move over "space" */
 197
 198                 v = p;                          /* save start of value */
 199                 while(*p != '\0') { p++; };     /* find end of string */
 200
 201                 if (ether_line(data_line, &eth_addr, hostname) == 0) {
 202                         fprintf(stdout, "%s\t%s\n",
 203                                 NTOA(&eth_addr),
 204                                 hostname);
 205                 } else {
 206                         fprintf(stderr,
 207                                 "%s: ignoring line %d: \"%s\"\n",
 208                                 ProgramName,
 209                                 line_no,
 210                                 data_line);
 211                 }
 212         }
 213
 214         return(0);
 215
 216 }