iwlist.c

wireless tools是linux下的一套对无线网卡进行配置的工具

		pm_mask = IW_POWER_MIN;
	      /* If we have something to ask for... */
	      if(pm_mask)
		get_pm_value(skfd, ifname, &wrq, pm_mask, buffer);

	      /* And if we have both a period and a timeout, ask the other */
	      pm_mask = (range.pm_capa & (~(wrq.u.power.flags) &
					  IW_POWER_TYPE));
	      if(pm_mask)
		{
		  int	base_mask = pm_mask;
		  flags = get_pm_value(skfd, ifname, &wrq, pm_mask, buffer);
		  pm_mask = 0;

		  /* If we have been returned a MIN value, ask for the MAX */
		  if(flags & IW_POWER_MIN)
		    pm_mask = IW_POWER_MAX | base_mask;
		  /* If we have been returned a MAX value, ask for the MIN */
		  if(flags & IW_POWER_MAX)
		    pm_mask = IW_POWER_MIN | base_mask;
		  /* If we have something to ask for... */
		  if(pm_mask)
		    get_pm_value(skfd, ifname, &wrq, pm_mask, buffer);
		}
	    }
	}
      printf("\n");
    }
  return(0);
}

/************************** TRANSMIT POWER **************************/

/*------------------------------------------------------------------*/
/*
 * Print the number of available transmit powers for the device
 */
static int
print_txpower_info(int		skfd,
		   char *	ifname,
		   char *	args[],		/* Command line args */
		   int		count)		/* Args count */
{
  struct iwreq		wrq;
  struct iw_range	range;
  int			dbm;
  int			mwatt;
  int			k;

  /* Avoid "Unused parameter" warning */
  args = args; count = count;

  /* Extract range info */
  if((iw_get_range_info(skfd, ifname, &range) < 0) ||
     (range.we_version_compiled < 10))
      fprintf(stderr, "%-8.16s  no transmit-power information.\n\n",
		      ifname);
  else
    {
      if((range.num_txpower <= 0) || (range.num_txpower > IW_MAX_TXPOWER))
	printf("%-8.16s  unknown transmit-power information.\n\n", ifname);
      else
	{
	  printf("%-8.16s  %d available transmit-powers :\n",
		 ifname, range.num_txpower);
	  /* Print them all */
	  for(k = 0; k < range.num_txpower; k++)
	    {
	      /* Check for relative values */
	      if(range.txpower_capa & IW_TXPOW_RELATIVE)
		{
		  printf("\t  %d (no units)\n", range.txpower[k]);
		}
	      else
		{
		  if(range.txpower_capa & IW_TXPOW_MWATT)
		    {
		      dbm = iw_mwatt2dbm(range.txpower[k]);
		      mwatt = range.txpower[k];
		    }
		  else
		    {
		      dbm = range.txpower[k];
		      mwatt = iw_dbm2mwatt(range.txpower[k]);
		    }
		  printf("\t  %d dBm  \t(%d mW)\n", dbm, mwatt);
		}
	    }
	}

      /* Get current Transmit Power */
      if(iw_get_ext(skfd, ifname, SIOCGIWTXPOW, &wrq) >= 0)
	{
	  printf("          Current Tx-Power");
	  /* Disabled ? */
	  if(wrq.u.txpower.disabled)
	    printf(":off\n\n");
	  else
	    {
	      /* Fixed ? */
	      if(wrq.u.txpower.fixed)
		printf("=");
	      else
		printf(":");
	      /* Check for relative values */
	      if(wrq.u.txpower.flags & IW_TXPOW_RELATIVE)
		{
		  /* I just hate relative value, because they are
		   * driver specific, so not very meaningfull to apps.
		   * But, we have to support that, because
		   * this is the way hardware is... */
		  printf("\t  %d (no units)\n", wrq.u.txpower.value);
		}
	      else
		{
		  if(wrq.u.txpower.flags & IW_TXPOW_MWATT)
		    {
		      dbm = iw_mwatt2dbm(wrq.u.txpower.value);
		      mwatt = wrq.u.txpower.value;
		    }
		  else
		    {
		      dbm = wrq.u.txpower.value;
		      mwatt = iw_dbm2mwatt(wrq.u.txpower.value);
		    }
		  printf("%d dBm  \t(%d mW)\n\n", dbm, mwatt);
		}
	    }
	}
    }
  return(0);
}

/*********************** RETRY LIMIT/LIFETIME ***********************/

/*------------------------------------------------------------------*/
/*
 * Print one retry value
 */
static inline int
get_retry_value(int		skfd,
		char *		ifname,
		struct iwreq *	pwrq,
		int		flags,
		char *		buffer,
		int		buflen)
{
  /* Get Another retry value */
  pwrq->u.retry.flags = flags;
  if(iw_get_ext(skfd, ifname, SIOCGIWRETRY, pwrq) >= 0)
    {
      /* Let's check the value and its type */
      if(pwrq->u.retry.flags & IW_RETRY_TYPE)
	{
	  iw_print_retry_value(buffer, buflen,
			       pwrq->u.retry.value, pwrq->u.retry.flags);
	  printf("%s\n                 ", buffer);
	}
    }
  return(pwrq->u.retry.flags);
}

/*------------------------------------------------------------------*/
/*
 * Print Retry info for each device
 */
static int
print_retry_info(int		skfd,
		 char *		ifname,
		 char *		args[],		/* Command line args */
		 int		count)		/* Args count */
{
  struct iwreq		wrq;
  struct iw_range	range;
  char			buffer[128];

  /* Avoid "Unused parameter" warning */
  args = args; count = count;

  /* Extract range info */
  if((iw_get_range_info(skfd, ifname, &range) < 0) ||
     (range.we_version_compiled < 11))
    fprintf(stderr, "%-8.16s  no retry limit/lifetime information.\n\n",
	    ifname);
  else
    {
      printf("%-8.16s  ", ifname);

      /* Display min/max limit availables */
      if(range.retry_flags & IW_RETRY_LIMIT)
	{
	  int	flags = (range.retry_flags & ~(IW_RETRY_MIN | IW_RETRY_MAX));
	  /* Display if auto or fixed */
	  if(range.retry_flags & IW_RETRY_MIN)
	    printf("Auto  limit    ; ");
	  else
	    printf("Fixed limit    ; ");
	  /* Print the range */
	  iw_print_retry_value(buffer, sizeof(buffer),
			       range.min_retry, flags | IW_RETRY_MIN);
	  printf("%s\n                           ", buffer);
	  iw_print_retry_value(buffer, sizeof(buffer),
			       range.max_retry, flags | IW_RETRY_MAX);
	  printf("%s\n          ", buffer);
	  
	}
      /* Display min/max lifetime availables */
      if(range.r_time_flags & IW_RETRY_LIFETIME)
	{
	  int	flags = (range.r_time_flags & ~(IW_RETRY_MIN | IW_RETRY_MAX));
	  /* Display if auto or fixed */
	  if(range.r_time_flags & IW_RETRY_MIN)
	    printf("Auto  lifetime ; ");
	  else
	    printf("Fixed lifetime ; ");
	  /* Print the range */
	  iw_print_retry_value(buffer, sizeof(buffer),
			       range.min_r_time, flags | IW_RETRY_MIN);
	  printf("%s\n                           ", buffer);
	  iw_print_retry_value(buffer, sizeof(buffer),
			       range.max_r_time, flags | IW_RETRY_MAX);
	  printf("%s\n          ", buffer);
	  
	}

      /* Get current retry settings */
      wrq.u.retry.flags = 0;
      if(iw_get_ext(skfd, ifname, SIOCGIWRETRY, &wrq) >= 0)
	{
	  int	flags = wrq.u.retry.flags;

	  /* Is it disabled ? */
	  if(wrq.u.retry.disabled)
	    printf("Current mode:off\n          ");
	  else
	    {
	      int	retry_mask = 0;

	      /* Let's check the mode */
	      printf("Current mode:on\n                 ");

	      /* Let's check the value and its type */
	      if(wrq.u.retry.flags & IW_RETRY_TYPE)
		{
		  iw_print_retry_value(buffer, sizeof(buffer),
				       wrq.u.retry.value, wrq.u.retry.flags);
		  printf("%s\n                 ", buffer);
		}

	      /* If we have been returned a MIN value, ask for the MAX */
	      if(flags & IW_RETRY_MIN)
		retry_mask = IW_RETRY_MAX;
	      /* If we have been returned a MAX value, ask for the MIN */
	      if(flags & IW_RETRY_MAX)
		retry_mask = IW_RETRY_MIN;
	      /* If we have something to ask for... */
	      if(retry_mask)
		get_retry_value(skfd, ifname, &wrq, retry_mask,
				buffer, sizeof(buffer));

	      /* And if we have both a period and a timeout, ask the other */
	      retry_mask = (range.retry_capa & (~(wrq.u.retry.flags) &
					  IW_RETRY_TYPE));
	      if(retry_mask)
		{
		  int	base_mask = retry_mask;
		  flags = get_retry_value(skfd, ifname, &wrq, retry_mask,
					  buffer, sizeof(buffer));
		  retry_mask = 0;

		  /* If we have been returned a MIN value, ask for the MAX */
		  if(flags & IW_RETRY_MIN)
		    retry_mask = IW_RETRY_MAX | base_mask;
		  /* If we have been returned a MAX value, ask for the MIN */
		  if(flags & IW_RETRY_MAX)
		    retry_mask = IW_RETRY_MIN | base_mask;
		  /* If we have something to ask for... */
		  if(retry_mask)
		    get_retry_value(skfd, ifname, &wrq, retry_mask,
				    buffer, sizeof(buffer));
		}
	    }
	}
      printf("\n");
    }
  return(0);
}

/***************************** SCANNING *****************************/
/*
 * This one behave quite differently from the others
 *
 * Note that we don't use the scanning capability of iwlib (functions
 * iw_process_scan() and iw_scan()). The main reason is that
 * iw_process_scan() return only a subset of the scan data to the caller,
 * for example custom elements and bitrates are ommited. Here, we
 * do the complete job...
 */

/*------------------------------------------------------------------*/
/*
 * Print one element from the scanning results
 */
static inline int
print_scanning_token(struct iw_event *	event,	/* Extracted token */
		     int		ap_num,	/* AP number */
		     struct iw_range *	iw_range,	/* Range info */
		     int		has_range)
{
  char		buffer[128];	/* Temporary buffer */

  /* Now, let's decode the event */
  switch(event->cmd)
    {
    case SIOCGIWAP:
      printf("          Cell %02d - Address: %s\n", ap_num,
	     iw_pr_ether(buffer, event->u.ap_addr.sa_data));
      ap_num++;
      break;
    case SIOCGIWNWID:
      if(event->u.nwid.disabled)
	printf("                    NWID:off/any\n");
      else
	printf("                    NWID:%X\n", event->u.nwid.value);
      break;
    case SIOCGIWFREQ:
      {
	double		freq;			/* Frequency/channel */
	int		channel = -1;		/* Converted to channel */
	freq = iw_freq2float(&(event->u.freq));
	/* Convert to channel if possible */
	if(has_range)
	  channel = iw_freq_to_channel(freq, iw_range);
	iw_print_freq(buffer, sizeof(buffer),
		      freq, channel, event->u.freq.flags);
	printf("                    %s\n", buffer);
      }
      break;
    case SIOCGIWMODE:
      printf("                    Mode:%s\n",
	     iw_operation_mode[event->u.mode]);
      break;
    case SIOCGIWNAME:
      printf("                    Protocol:%-1.16s\n", event->u.name);
      break;
    case SIOCGIWESSID:
      {
	char essid[IW_ESSID_MAX_SIZE+1];
	if((event->u.essid.pointer) && (event->u.essid.length))
	  memcpy(essid, event->u.essid.pointer, event->u.essid.length);
	essid[event->u.essid.length] = '\0';
	if(event->u.essid.flags)
	  {
	    /* Does it have an ESSID index ? */
	    if((event->u.essid.flags & IW_ENCODE_INDEX) > 1)
	      printf("                    ESSID:\"%s\" [%d]\n", essid,
		     (event->u.essid.flags & IW_ENCODE_INDEX));
	    else
	      printf("                    ESSID:\"%s\"\n", essid);
	  }
	else
	  printf("                    ESSID:off/any\n");
      }
      break;
    case SIOCGIWENCODE:
      {
	unsigned char	key[IW_ENCODING_TOKEN_MAX];
	if(event->u.data.pointer)
	  memcpy(key, event->u.essid.pointer, event->u.data.length);
	else
	  event->u.data.flags |= IW_ENCODE_NOKEY;
	printf("                    Encryption key:");
	if(event->u.data.flags & IW_ENCODE_DISABLED)
	  printf("off\n");
	else
	  {
	    /* Display the key */
	    iw_print_key(buffer, sizeof(buffer), key, event->u.data.length,
			 event->u.data.flags);
	    printf("%s", buffer);

	    /* Other info... */
	    if((event->u.data.flags & IW_ENCODE_INDEX) > 1)
	      printf(" [%d]", event->u.data.flags & IW_ENCODE_INDEX);
	    if(event->u.data.flags & IW_ENCODE_RESTRICTED)
	      printf("   Security mode:restricted");
	    if(event->u.data.flags & IW_ENCODE_OPEN)
	      printf("   Security mode:open");
	    printf("\n");
	  }
      }
      break;
    case SIOCGIWRATE:
      iw_print_bitrate(buffer, sizeof(buffer), event->u.bitrate.value);
      printf("                    Bit Rate:%s\n", buffer);
      break;
    case IWEVQUAL:
      {
	iw_print_stats(buffer, sizeof(buffer),
		       &event->u.qual, iw_range, has_range);
	printf("                    %s\n", buffer);
	break;
      }
    case IWEVCUSTOM:
      {
	char custom[IW_CUSTOM_MAX+1];
	if((event->u.data.pointer) && (event->u.data.length))
	  memcpy(custom, event->u.data.pointer, event->u.data.length);
	custom[event->u.data.length] = '\0';
	printf("                    Extra:%s\n", custom);
      }
      break;
    default:
      printf("                    (Unknown Wireless Token 0x%04X)\n",
	     event->cmd);
   }	/* switch(event->cmd) */

  /* May have changed */
  return(ap_num);
}

/*------------------------------------------------------------------*/
/*
 * Perform a scanning on one device
 */
static int
print_scanning_info(int		skfd,
		    char *	ifname,
		    char *	args[],		/* Command line args */
		    int		count)		/* Args count */
{
  struct iwreq		wrq;
  unsigned char *	buffer = NULL;		/* Results */
  int			buflen = IW_SCAN_MAX_DATA; /* Min for compat WE<17 */
  struct iw_range	range;