michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsWifiMonitor.h"
michael@0: #include "nsWifiAccessPoint.h"
michael@0: 
michael@0: #include "nsServiceManagerUtils.h"
michael@0: #include "nsComponentManagerUtils.h"
michael@0: #include "nsIMutableArray.h"
michael@0: 
michael@0: #include "plstr.h"
michael@0: #include <glib.h>
michael@0: 
michael@0: #define DLADM_STRSIZE 256
michael@0: #define DLADM_SECTIONS 3
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: struct val_strength_t {
michael@0:   const char *strength_name;
michael@0:   int         signal_value;
michael@0: };
michael@0: 
michael@0: static val_strength_t strength_vals[] = {
michael@0:   { "very weak", -112 },
michael@0:   { "weak",      -88 },
michael@0:   { "good",      -68 },
michael@0:   { "very good", -40 },
michael@0:   { "excellent", -16 }
michael@0: };
michael@0: 
michael@0: static nsWifiAccessPoint *
michael@0: do_parse_str(char *bssid_str, char *essid_str, char *strength)
michael@0: {
michael@0:   unsigned char mac_as_int[6] = { 0 };
michael@0:   sscanf(bssid_str, "%x:%x:%x:%x:%x:%x", &mac_as_int[0], &mac_as_int[1],
michael@0:          &mac_as_int[2], &mac_as_int[3], &mac_as_int[4], &mac_as_int[5]);
michael@0: 
michael@0:   int signal = 0;
michael@0:   uint32_t strength_vals_count = sizeof(strength_vals) / sizeof (val_strength_t);
michael@0:   for (uint32_t i = 0; i < strength_vals_count; i++) {
michael@0:     if (!strncasecmp(strength, strength_vals[i].strength_name, DLADM_STRSIZE)) {
michael@0:       signal = strength_vals[i].signal_value;
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   nsWifiAccessPoint *ap = new nsWifiAccessPoint();
michael@0:   if (ap) {
michael@0:     ap->setMac(mac_as_int);
michael@0:     ap->setSignal(signal);
michael@0:     ap->setSSID(essid_str, PL_strnlen(essid_str, DLADM_STRSIZE));
michael@0:   }
michael@0:   return ap;
michael@0: }
michael@0: 
michael@0: static void
michael@0: do_dladm(nsCOMArray<nsWifiAccessPoint> &accessPoints)
michael@0: {
michael@0:   GError *err = nullptr;
michael@0:   char *sout = nullptr;
michael@0:   char *serr = nullptr;
michael@0:   int exit_status = 0;
michael@0:   char * dladm_args[] = { "/usr/bin/pfexec", "/usr/sbin/dladm",
michael@0:                           "scan-wifi", "-p", "-o", "BSSID,ESSID,STRENGTH" };
michael@0: 
michael@0:   gboolean rv = g_spawn_sync("/", dladm_args, nullptr, (GSpawnFlags)0, nullptr,
michael@0:                              nullptr, &sout, &serr, &exit_status, &err);
michael@0:   if (rv && !exit_status) {
michael@0:     char wlan[DLADM_SECTIONS][DLADM_STRSIZE+1];
michael@0:     uint32_t section = 0;
michael@0:     uint32_t sout_scan = 0;
michael@0:     uint32_t wlan_put = 0;
michael@0:     bool escape = false;
michael@0:     nsWifiAccessPoint* ap;
michael@0:     char sout_char;
michael@0:     do {
michael@0:       sout_char = sout[sout_scan++];
michael@0:       if (escape) {
michael@0:         escape = false;
michael@0:         if (sout_char != '\0') {
michael@0:           wlan[section][wlan_put++] = sout_char;
michael@0:           continue;
michael@0:         }
michael@0:       }
michael@0: 
michael@0:       if (sout_char =='\\') {
michael@0:         escape = true;
michael@0:         continue;
michael@0:       }
michael@0: 
michael@0:       if (sout_char == ':') {
michael@0:         wlan[section][wlan_put] = '\0';
michael@0:         section++;
michael@0:         wlan_put = 0;
michael@0:         continue;
michael@0:       }
michael@0: 
michael@0:       if ((sout_char == '\0') || (sout_char == '\n')) {
michael@0:         wlan[section][wlan_put] = '\0';
michael@0:         if (section == DLADM_SECTIONS - 1) {
michael@0:           ap = do_parse_str(wlan[0], wlan[1], wlan[2]);
michael@0:           if (ap) {
michael@0:             accessPoints.AppendObject(ap);
michael@0:           }
michael@0:         }
michael@0:         section = 0;
michael@0:         wlan_put = 0;
michael@0:         continue;
michael@0:       }
michael@0: 
michael@0:       wlan[section][wlan_put++] = sout_char;
michael@0: 
michael@0:     } while ((wlan_put <= DLADM_STRSIZE) && (section < DLADM_SECTIONS) &&
michael@0:              (sout_char != '\0'));
michael@0:   }
michael@0: 
michael@0:   g_free(sout);
michael@0:   g_free(serr);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsWifiMonitor::DoScan()
michael@0: {
michael@0:   // Regularly get the access point data.
michael@0: 
michael@0:   nsCOMArray<nsWifiAccessPoint> lastAccessPoints;
michael@0:   nsCOMArray<nsWifiAccessPoint> accessPoints;
michael@0: 
michael@0:   while (mKeepGoing) {
michael@0: 
michael@0:     accessPoints.Clear();
michael@0:     do_dladm(accessPoints);
michael@0: 
michael@0:     bool accessPointsChanged = !AccessPointsEqual(accessPoints, lastAccessPoints);
michael@0:     ReplaceArray(lastAccessPoints, accessPoints);
michael@0: 
michael@0:     nsresult rv = CallWifiListeners(lastAccessPoints, accessPointsChanged);
michael@0:     NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:     LOG(("waiting on monitor\n"));
michael@0: 
michael@0:     ReentrantMonitorAutoEnter mon(mReentrantMonitor);
michael@0:     mon.Wait(PR_SecondsToInterval(60));
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }