lib/ash.c

   1 /*
   2  * lib/ash.c  This file contains an implementation of the Ash
   3  *              support functions for the NET-2 base distribution.
   4  * $Id: ash.c,v 1.11 1999/09/27 11:00:45 philip Exp $
   5  */
   6
   7 #include "config.h"
   8
   9 #if HAVE_HWASH || HAVE_AFASH
  10
  11 #include <sys/types.h>
  12 #include <sys/socket.h>
  13 #include <net/if_arp.h>
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <errno.h>
  17 #include <ctype.h>
  18 #include <string.h>
  19 #include <unistd.h>
  20 #include "net-support.h"
  21 #include "pathnames.h"
  22 #include "intl.h"
  23 #include "util.h"
  24
  25 #define ASH_ALEN                64
  26
  27 static unsigned char hamming[16] =
  28 {
  29     0x15, 0x02, 0x49, 0x5e, 0x64, 0x73, 0x38, 0x2f,
  30     0xd0, 0xc7, 0x8c, 0x9b, 0xa1, 0xb6, 0xfd, 0xea
  31 };
  32
  33 /* Display an Ash address in readable format. */
  34 static char *
  35 pr_ash(unsigned char *ptr)
  36 {
  37     static char buff[128];
  38     char *p = buff;
  39     unsigned int i = 0;
  40
  41     p[0] = '[';
  42     p++;
  43     while (ptr[i] != 0xc9 && ptr[i] != 0xff && (i < ASH_ALEN))
  44         sprintf(p++, "%1x", ptr[i++]);
  45     *(p++) = ']';
  46     *p = 0;
  47
  48     return buff;
  49 }
  50
  51 #if HAVE_HWASH
  52
  53 #ifndef ARPHRD_ASH
  54 #warning "No definition of ARPHRD_ASH in <net/if_arp.h>, using private value 517"
  55 #define ARPHRD_ASH 517
  56 #endif
  57
  58 struct hwtype ash_hwtype;
  59
  60 static int
  61 in_ash(char *bufp, struct sockaddr *sap)
  62 {
  63     unsigned char *ptr;
  64     unsigned int i = 0;
  65
  66     sap->sa_family = ash_hwtype.type;
  67     ptr = sap->sa_data;
  68
  69     while (bufp && i < ASH_ALEN) {
  70         char *next;
  71         int hop = strtol(bufp, &next, 16);
  72         ptr[i++] = hamming[hop];
  73         switch (*next) {
  74         case ':':
  75             bufp = next + 1;
  76             break;
  77         case 0:
  78             bufp = NULL;
  79             break;
  80         default:
  81             fprintf(stderr, _("Malformed Ash address"));
  82             memset(ptr, 0xc9, ASH_ALEN);
  83             return -1;
  84         }
  85     }
  86
  87     while (i < ASH_ALEN)
  88         ptr[i++] = 0xc9;
  89
  90     return 0;
  91 }
  92
  93 struct hwtype ash_hwtype =
  94 {
  95     "ash", NULL, ARPHRD_ASH, ASH_ALEN,
  96     pr_ash, in_ash, NULL,
  97     1
  98 };
  99
 100 #endif  /* HAVE_HWASH */
 101
 102 #if HAVE_AFASH
 103
 104 /* Display an Ash socket address. */
 105 static char *
 106 pr_sash(struct sockaddr *sap, int numeric)
 107 {
 108     static char buf[64];
 109
 110     if (sap->sa_family != AF_ASH)
 111         return safe_strncpy(buf, "[NONE SET]", 64);
 112     return pr_ash(sap->sa_data);
 113 }
 114
 115 struct aftype ash_aftype =
 116 {
 117     "ash", NULL, AF_ASH, 0,
 118     pr_ash, pr_sash, NULL, NULL,
 119     NULL, NULL, NULL,
 120     -1,
 121     "/proc/sys/net/ash"
 122 };
 123
 124 #endif  /* HAVE_AFASH */
 125
 126 #endif  /* HAVE_AFASH || HAVE_HWASH */