libs/luanet: add wifi channel enumeration

[project/luci.git] / libs / luanet / src / iwconfig.c

diff --git a/libs/luanet/src/iwconfig.c b/libs/luanet/src/iwconfig.c
index 5fc65b6..7071169 100644 (file)
--- a/libs/luanet/src/iwconfig.c
+++ b/libs/luanet/src/iwconfig.c
@@ -13,6 +13,7 @@
  *
  *   Copyright (C) 2008 John Crispin <blogic@openwrt.org> 
  *   Copyright (C) 2008 Steven Barth <steven@midlink.org>
+ *   Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org>
  */
 
 #include <net/if.h>
@@ -827,3 +828,54 @@ realloc:
        free(buffer);
        return 0;
 }
+
+int iwc_frequencies(lua_State *L)
+{
+       int i;
+       int has_range;
+       char *ifname;
+       struct iw_range range;
+
+       if(lua_gettop(L) != 1)
+       {
+               lua_pushstring(L, "invalid arg list");
+               lua_error(L);
+               return 0;
+       }
+
+       ifname = (char *)lua_tostring (L, 1);
+
+       /* Get range stuff */
+       has_range = (iw_get_range_info(sock_iwconfig, ifname, &range) >= 0);
+
+       /* Check if the interface could support scanning. */
+       if((!has_range) || (range.we_version_compiled < 14))
+       {
+               lua_pushstring(L, "interface does not support frequency enumeration");
+               lua_error(L);
+       }
+       else
+       {
+               lua_newtable(L);
+
+               for(i = 0; i < range.num_frequency; i++)
+               {
+                       lua_pushnumber(L, i + 1);
+                       lua_newtable(L);
+
+                       lua_pushinteger(L, 1);
+                       lua_pushinteger(L, (int)range.freq[i].i);
+                       lua_settable(L, -3);
+
+                       lua_pushinteger(L, 2);
+                       lua_pushnumber(L, iw_freq2float(&(range.freq[i])));
+                       lua_settable(L, -3);
+
+                       lua_settable(L, -3);
+               }
+
+               return 1;
+       }
+
+       return 0;
+}