wapi: Add pscan cmd to trigger a passive scan.

Added scanning in passive mode without affecting the scan command.

Signed-off-by: xuchaojie <[email protected]>

Author: xuchaojie

include/wireless/wapi.h

@@ -707,6 +707,31 @@ int wapi_scan_channel_init(int sock, FAR const char *ifname,
                            FAR const char *essid,
                            uint8_t *channels, int num_channels);
 
+/****************************************************************************
+ * Name: wapi_escan_init
+ *
+ * Description:
+ *   Starts a extended scan on the given interface, you can specify the scan
+ *   type. Root privileges are required to start a scan.
+ *
+ ****************************************************************************/
+
+int wapi_escan_init(int sock, FAR const char *ifname,
+                    uint8_t scan_type, FAR const char *essid);
+
+/****************************************************************************
+ * Name: wapi_escan_channel_init
+ *
+ * Description:
+ *   Starts a scan on the given interface. Root privileges are required to
+ *   start a scan with specified channels.
+ *
+ ****************************************************************************/
+
+int wapi_escan_channel_init(int sock, FAR const char *ifname,
+                            uint8_t scan_type, FAR const char *essid,
+                            uint8_t *channels, int num_channels);
+
 /****************************************************************************
  * Name: wapi_scan_stat
  *

wireless/wapi/src/wapi.c

@@ -97,6 +97,7 @@ static int wapi_bitrate_cmd      (int sock, int argc, FAR char **argv);
 static int wapi_txpower_cmd      (int sock, int argc, FAR char **argv);
 static int wapi_scan_results_cmd (int sock, int argc, FAR char **argv);
 static int wapi_scan_cmd         (int sock, int argc, FAR char **argv);
+static int wapi_pscan_cmd        (int sock, int argc, FAR char **argv);
 static int wapi_country_cmd      (int sock, int argc, FAR char **argv);
 static int wapi_sense_cmd        (int sock, int argc, FAR char **argv);
 #ifdef CONFIG_WIRELESS_WAPI_INITCONF
@@ -114,6 +115,7 @@ static const struct wapi_command_s g_wapi_commands[] =
   {"help",         0, 0, NULL},
   {"show",         1, 1, wapi_show_cmd},
   {"scan",         1, 2, wapi_scan_cmd},
+  {"pscan",        1, 2, wapi_pscan_cmd},
   {"scan_results", 1, 1, wapi_scan_results_cmd},
   {"ip",           2, 2, wapi_ip_cmd},
   {"mask",         2, 2, wapi_mask_cmd},
@@ -833,7 +835,8 @@ static int wapi_scan_results_cmd(int sock, int argc, FAR char **argv)
  * Name: wapi_scan_cmd
  *
  * Description:
- *   Scans available APs in the range using given ifname interface.
+ *   Use the given ifname interface and active mode to scan the APs
+ *   available in the range.
  *
  * Returned Value:
  *   None
@@ -849,7 +852,37 @@ static int wapi_scan_cmd(int sock, int argc, FAR char **argv)
 
   /* Start scan */
 
-  ret = wapi_scan_init(sock, argv[0], essid);
+  ret = wapi_escan_init(sock, argv[0], IW_SCAN_TYPE_ACTIVE, essid);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  return wapi_scan_results_cmd(sock, 1, argv);
+}
+
+/****************************************************************************
+ * Name: wapi_pscan_cmd
+ *
+ * Description:
+ *   Use the given ifname interface and passive mode to scan the APs
+ *   available in the range.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+static int wapi_pscan_cmd(int sock, int argc, FAR char **argv)
+{
+  FAR const char *essid;
+  int ret;
+
+  essid = argc > 1 ? argv[1] : NULL;
+
+  /* Start scan */
+
+  ret = wapi_escan_init(sock, argv[0], IW_SCAN_TYPE_PASSIVE, essid);
   if (ret < 0)
     {
       return ret;
@@ -1095,6 +1128,7 @@ static void wapi_showusage(FAR const char *progname, int exitcode)
   fprintf(stderr, "Usage:\n");
   fprintf(stderr, "\t%s show         <ifname>\n", progname);
   fprintf(stderr, "\t%s scan         <ifname>\n", progname);
+  fprintf(stderr, "\t%s pscan        <ifname>\n", progname);
   fprintf(stderr, "\t%s scan_results <ifname>\n", progname);
   fprintf(stderr, "\t%s ip           <ifname> <IP address>\n", progname);
   fprintf(stderr, "\t%s mask         <ifname> <mask>\n", progname);

wireless/wapi/src/wireless.c

@@ -1183,6 +1183,23 @@ int wapi_set_txpower(int sock, FAR const char *ifname, int power,
 int wapi_scan_channel_init(int sock, FAR const char *ifname,
                            FAR const char *essid,
                            uint8_t *channels, int num_channels)
+{
+  return wapi_escan_channel_init(sock, ifname, IW_SCAN_TYPE_ACTIVE, essid,
+                                 channels, num_channels);
+}
+
+/****************************************************************************
+ * Name: wapi_escan_channel_init
+ *
+ * Description:
+ *   Starts a scan on the given interface. Root privileges are required to
+ *   start a scan with specified channels.
+ *
+ ****************************************************************************/
+
+int wapi_escan_channel_init(int sock, FAR const char *ifname,
+                           uint8_t scan_type, FAR const char *essid,
+                           uint8_t *channels, int num_channels)
 {
   struct iw_scan_req req;
   struct iwreq wrq =
@@ -1193,16 +1210,13 @@ int wapi_scan_channel_init(int sock, FAR const char *ifname,
   int ret;
   int i;
 
+  memset(&req, 0, sizeof(req));
+
   if (essid && (essid_len = strlen(essid)) > 0)
     {
-      memset(&req, 0, sizeof(req));
-      req.essid_len       = essid_len;
-      req.bssid.sa_family = ARPHRD_ETHER;
-      memset(req.bssid.sa_data, 0xff, IFHWADDRLEN);
+      req.essid_len    = essid_len;
       memcpy(req.essid, essid, essid_len);
-      wrq.u.data.pointer  = (caddr_t)&req;
-      wrq.u.data.length   = sizeof(req);
-      wrq.u.data.flags    = IW_SCAN_THIS_ESSID;
+      wrq.u.data.flags = IW_SCAN_THIS_ESSID;
     }
 
   if (channels && num_channels > 0)
@@ -1214,6 +1228,12 @@ int wapi_scan_channel_init(int sock, FAR const char *ifname,
         }
     }
 
+  req.scan_type       = scan_type;
+  req.bssid.sa_family = ARPHRD_ETHER;
+  memset(req.bssid.sa_data, 0xff, IFHWADDRLEN);
+  wrq.u.data.pointer  = (caddr_t)&req;
+  wrq.u.data.length   = sizeof(req);
+
   strlcpy(wrq.ifr_name, ifname, IFNAMSIZ);
   ret = ioctl(sock, SIOCSIWSCAN, (unsigned long)((uintptr_t)&wrq));
   if (ret < 0)
@@ -1240,6 +1260,21 @@ int wapi_scan_init(int sock, FAR const char *ifname, FAR const char *essid)
   return wapi_scan_channel_init(sock, ifname, essid, NULL, 0);
 }
 
+/****************************************************************************
+ * Name: wapi_escan_init
+ *
+ * Description:
+ *   Starts a extended scan on the given interface, you can specify the scan
+ *   type. Root privileges are required to start a scan.
+ *
+ ****************************************************************************/
+
+int wapi_escan_init(int sock, FAR const char *ifname,
+                   uint8_t scan_type, FAR const char *essid)
+{
+  return wapi_escan_channel_init(sock, ifname, scan_type, essid, NULL, 0);
+}
+
 /****************************************************************************
  * Name: wapi_scan_stat
  *