usr/src/cmd/ipf/lib/common/getifname.c

   1 /*
   2  * Copyright (C) 2003 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
   7  * Use is subject to license terms.
   8  */
   9
  10 #include "ipf.h"
  11 #include "kmem.h"
  12
  13 /*
  14  * Given a pointer to an interface in the kernel, return a pointer to a
  15  * string which is the interface name.
  16  *
  17  * The same code is used to run in two different environments: in ipfstat
  18  * and in ipftest.  In ipftest, kmemcpy is wrapper for bcopy but in ipfstat,
  19  * it is used as an interface to libkvm.
  20  */
  21 char *getifname(ptr)
  22 struct ifnet *ptr;
  23 {
  24 # ifdef SOLARIS
  25 #  include <sys/mutex.h>
  26 #  include <sys/condvar.h>
  27 # endif
  28 # ifdef __hpux
  29 #  include "compat.h"
  30 # endif
  31 # if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
  32     defined(__OpenBSD__) || \
  33     (defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
  34 #else
  35         char buf[32];
  36         int len;
  37 # endif
  38         struct ifnet netif;
  39 #define SOLARIS_PFHOOKS 1
  40 # ifdef SOLARIS_PFHOOKS
  41         if ((opts & OPT_DONOTHING) == 0)
  42                 return "@";
  43 # endif
  44
  45         if ((void *)ptr == (void *)-1)
  46                 return "!";
  47         if (ptr == NULL)
  48                 return "-";
  49
  50         if (kmemcpy((char *)&netif, (u_long)ptr, sizeof(netif)) == -1)
  51                 return "X";
  52 # if defined(NetBSD) && (NetBSD >= 199905) && (NetBSD < 1991011) || \
  53     defined(__OpenBSD__) || defined(linux) || \
  54     (defined(__FreeBSD__) && (__FreeBSD_version >= 501113))
  55         return strdup(netif.if_xname);
  56 # else
  57         if (kstrncpy(buf, (u_long)netif.if_name, sizeof(buf)) == -1)
  58                 return "X";
  59         if (netif.if_unit < 10)
  60                 len = 2;
  61         else if (netif.if_unit < 1000)
  62                 len = 3;
  63         else if (netif.if_unit < 10000)
  64                 len = 4;
  65         else
  66                 len = 5;
  67         buf[sizeof(buf) - len] = '\0';
  68         sprintf(buf + strlen(buf), "%d", netif.if_unit % 10000);
  69         return strdup(buf);
  70 # endif
  71 }