util.c

   1 #include "nl80211.h"
   2 #include "iw.h"
   3
   4 int mac_addr_n2a(char *mac_addr, unsigned char *arg)
   5 {
   6         int i, l;
   7
   8         l = 0;
   9         for (i = 0; i < ETH_ALEN ; i++) {
  10                 if (i == 0) {
  11                         sprintf(mac_addr+l, "%02x", arg[i]);
  12                         l += 2;
  13                 } else {
  14                         sprintf(mac_addr+l, ":%02x", arg[i]);
  15                         l += 3;
  16                 }
  17         }
  18         return 0;
  19 }
  20
  21 int mac_addr_a2n(unsigned char *mac_addr, char *arg)
  22 {
  23         int i;
  24
  25         for (i = 0; i < ETH_ALEN ; i++) {
  26                 int temp;
  27                 char *cp = strchr(arg, ':');
  28                 if (cp) {
  29                         *cp = 0;
  30                         cp++;
  31                 }
  32                 if (sscanf(arg, "%x", &temp) != 1)
  33                         return -1;
  34                 if (temp < 0 || temp > 255)
  35                         return -1;
  36
  37                 mac_addr[i] = temp;
  38                 if (!cp)
  39                         break;
  40                 arg = cp;
  41         }
  42         if (i < ETH_ALEN - 1)
  43                 return -1;
  44
  45         return 0;
  46 }
  47
  48 static const char *ifmodes[NL80211_IFTYPE_MAX + 1] = {
  49         "unspecified",
  50         "IBSS",
  51         "Station",
  52         "AP",
  53         "AP(VLAN)",
  54         "WDS",
  55         "Monitor",
  56         "mesh point"
  57 };
  58
  59 static char modebuf[100];
  60
  61 const char *iftype_name(enum nl80211_iftype iftype)
  62 {
  63         if (iftype <= NL80211_IFTYPE_MAX)
  64                 return ifmodes[iftype];
  65         sprintf(modebuf, "Unknown mode (%d)", iftype);
  66         return modebuf;
  67 }
  68
  69 int ieee80211_channel_to_frequency(int chan)
  70 {
  71         if (chan < 14)
  72                 return 2407 + chan * 5;
  73
  74         if (chan == 14)
  75                 return 2484;
  76
  77         /* FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2) */
  78         return (chan + 1000) * 5;
  79 }
  80
  81 int ieee80211_frequency_to_channel(int freq)
  82 {
  83         if (freq == 2484)
  84                 return 14;
  85
  86         if (freq < 2484)
  87                 return (freq - 2407) / 5;
  88
  89         /* FIXME: dot11ChannelStartingFactor (802.11-2007 17.3.8.3.2) */
  90         return freq/5 - 1000;
  91 }