libiwinfo: support scanning on radioX pseudo interfaces

diff --git a/contrib/package/iwinfo/src/iwinfo_nl80211.c b/contrib/package/iwinfo/src/iwinfo_nl80211.c
index a693d53..e35dbab 100644 (file)
--- a/contrib/package/iwinfo/src/iwinfo_nl80211.c
+++ b/contrib/package/iwinfo/src/iwinfo_nl80211.c
@@ -385,6 +385,93 @@ out:
        return rv;
 }
 
+static char * nl80211_phy2ifname(const char *ifname)
+{
+       int fd, phyidx = 0;
+       char buffer[64];
+       static char nif[IFNAMSIZ] = { 0 };
+
+       DIR *d;
+       struct dirent *e;
+
+       if( !strncmp(ifname, "radio", 5) )
+       {
+               phyidx = atoi(&ifname[5]);
+
+               if( (d = opendir("/sys/class/net")) != NULL )
+               {
+                       while( (e = readdir(d)) != NULL )
+                       {
+                               snprintf(buffer, sizeof(buffer),
+                                       "/sys/class/net/%s/phy80211/index", e->d_name);
+
+                               if( (fd = open(buffer, O_RDONLY)) > 0 )
+                               {
+                                       if( (read(fd, buffer, sizeof(buffer)) > 0) &&
+                                           (atoi(buffer) == phyidx) )
+                                       {
+                                               strncpy(nif, e->d_name, sizeof(nif));
+                                       }
+
+                                       close(fd);
+                               }
+
+                               if( nif[0] )
+                                       break;
+                       }
+
+                       closedir(d);
+               }
+       }
+
+       return nif[0] ? nif : NULL;
+}
+
+static char * nl80211_add_tempif(const char *ifname)
+{
+       int phyidx;
+       char *rv = NULL;
+       static char nif[IFNAMSIZ] = { 0 };
+       struct nl80211_msg_conveyor *req, *res;
+
+       req = nl80211_msg(ifname, NL80211_CMD_NEW_INTERFACE, 0);
+       if( req )
+       {
+               snprintf(nif, sizeof(nif), "tmp.%s", ifname);
+
+               NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, nif);
+               NLA_PUT_U32(req->msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_STATION);
+
+               res = nl80211_send(req);
+               if( res )
+               {
+                       rv = nif;
+                       nl80211_free(res);
+               }
+
+       nla_put_failure:
+               nl80211_free(req);
+       }
+
+       return rv;
+}
+
+static void nl80211_del_tempif(const char *ifname)
+{
+       struct nl80211_msg_conveyor *req, *res;
+
+       req = nl80211_msg(ifname, NL80211_CMD_DEL_INTERFACE, 0);
+       if( req )
+       {
+               NLA_PUT_STRING(req->msg, NL80211_ATTR_IFNAME, ifname);
+
+               nl80211_free(nl80211_send(req));
+
+       nla_put_failure:
+               nl80211_free(req);
+       }
+}
+
 
 int nl80211_probe(const char *ifname)
 {
@@ -1058,6 +1145,24 @@ int nl80211_get_scanlist(const char *ifname, char *buf, int *len)
        char bssid[18] = { 0 };
        char cipher[256] = { 0 };
 
+       /* Got a radioX pseudo interface, find some interface on it or create one */
+       if( !strncmp(ifname, "radio", 5) )
+       {
+               /* Reuse existing interface */
+               if( (res = nl80211_phy2ifname(ifname)) != NULL )
+               {
+                       return nl80211_get_scanlist(res, buf, len);
+               }
+
+               /* Need to spawn a temporary iface for scanning */
+               else if( (res = nl80211_add_tempif(ifname)) != NULL )
+               {
+                       count = nl80211_get_scanlist(res, buf, len);
+                       nl80211_del_tempif(res);
+                       return count;
+               }
+       }
+
        struct iwinfo_scanlist_entry *e = (struct iwinfo_scanlist_entry *)buf;
 
        /* WPA supplicant */

diff --git a/contrib/package/iwinfo/src/iwinfo_nl80211.h b/contrib/package/iwinfo/src/iwinfo_nl80211.h
index 97a2904..6c03ca1 100644 (file)
--- a/contrib/package/iwinfo/src/iwinfo_nl80211.h
+++ b/contrib/package/iwinfo/src/iwinfo_nl80211.h
@@ -23,6 +23,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <string.h>
+#include <dirent.h>
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <net/if.h>