219 lines
7.7 KiB
C++
219 lines
7.7 KiB
C++
/**
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*
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* @file ESP8266WiFiMulti.cpp
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* @date 16.05.2015
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* @author Markus Sattler
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*
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* Copyright (c) 2015 Markus Sattler. All rights reserved.
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* This file is part of the esp8266 core for Arduino environment.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "WiFiMulti.h"
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#include <limits.h>
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#include <string.h>
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#include <esp32-hal.h>
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WiFiMulti::WiFiMulti()
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{
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}
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WiFiMulti::~WiFiMulti()
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{
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APlistClean();
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}
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bool WiFiMulti::addAP(const char* ssid, const char *passphrase)
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{
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return APlistAdd(ssid, passphrase);
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}
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uint8_t WiFiMulti::run(void)
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{
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int8_t scanResult;
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uint8_t status = WiFi.status();
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if(status == WL_DISCONNECTED || status == WL_NO_SSID_AVAIL || status == WL_IDLE_STATUS || status == WL_CONNECT_FAILED) {
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scanResult = WiFi.scanComplete();
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if(scanResult == WIFI_SCAN_RUNNING) {
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// scan is running
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return WL_NO_SSID_AVAIL;
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} else if(scanResult > 0) {
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// scan done analyze
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WifiAPlist_t bestNetwork { NULL, NULL };
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int bestNetworkDb = INT_MIN;
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uint8_t bestBSSID[6];
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int32_t bestChannel = 0;
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DEBUG_WIFI_MULTI("[WIFI] scan done\n");
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delay(0);
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if(scanResult <= 0) {
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DEBUG_WIFI_MULTI("[WIFI] no networks found\n");
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} else {
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DEBUG_WIFI_MULTI("[WIFI] %d networks found\n", scanResult);
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for(int8_t i = 0; i < scanResult; ++i) {
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String ssid_scan;
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int32_t rssi_scan;
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uint8_t sec_scan;
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uint8_t* BSSID_scan;
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int32_t chan_scan;
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WiFi.getNetworkInfo(i, ssid_scan, sec_scan, rssi_scan, BSSID_scan, chan_scan);
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bool known = false;
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for(uint32_t x = 0; x < APlist.size(); x++) {
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WifiAPlist_t entry = APlist[x];
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if(ssid_scan == entry.ssid) { // SSID match
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known = true;
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if(rssi_scan > bestNetworkDb) { // best network
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if(sec_scan == WIFI_AUTH_OPEN || entry.passphrase) { // check for passphrase if not open wlan
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bestNetworkDb = rssi_scan;
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bestChannel = chan_scan;
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memcpy((void*) &bestNetwork, (void*) &entry, sizeof(bestNetwork));
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memcpy((void*) &bestBSSID, (void*) BSSID_scan, sizeof(bestBSSID));
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}
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}
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break;
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}
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}
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if(known) {
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DEBUG_WIFI_MULTI(" ---> ");
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} else {
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DEBUG_WIFI_MULTI(" ");
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}
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DEBUG_WIFI_MULTI(" %d: [%d][%02X:%02X:%02X:%02X:%02X:%02X] %s (%d) %c\n", i, chan_scan, BSSID_scan[0], BSSID_scan[1], BSSID_scan[2], BSSID_scan[3], BSSID_scan[4], BSSID_scan[5], ssid_scan.c_str(), rssi_scan, (sec_scan == WIFI_AUTH_OPEN) ? ' ' : '*');
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delay(0);
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}
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}
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// clean up ram
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WiFi.scanDelete();
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DEBUG_WIFI_MULTI("\n\n");
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delay(0);
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if(bestNetwork.ssid) {
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DEBUG_WIFI_MULTI("[WIFI] Connecting BSSID: %02X:%02X:%02X:%02X:%02X:%02X SSID: %s Channal: %d (%d)\n", bestBSSID[0], bestBSSID[1], bestBSSID[2], bestBSSID[3], bestBSSID[4], bestBSSID[5], bestNetwork.ssid, bestChannel, bestNetworkDb);
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WiFi.begin(bestNetwork.ssid, bestNetwork.passphrase, bestChannel, bestBSSID);
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status = WiFi.status();
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// wait for connection or fail
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while(status != WL_CONNECTED && status != WL_NO_SSID_AVAIL && status != WL_CONNECT_FAILED) {
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delay(10);
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status = WiFi.status();
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}
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IPAddress ip;
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uint8_t * mac;
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switch(status) {
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case 3:
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ip = WiFi.localIP();
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mac = WiFi.BSSID();
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DEBUG_WIFI_MULTI("[WIFI] Connecting done.\n");
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DEBUG_WIFI_MULTI("[WIFI] SSID: %s\n", WiFi.SSID());
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DEBUG_WIFI_MULTI("[WIFI] IP: %d.%d.%d.%d\n", ip[0], ip[1], ip[2], ip[3]);
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DEBUG_WIFI_MULTI("[WIFI] MAC: %02X:%02X:%02X:%02X:%02X:%02X\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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DEBUG_WIFI_MULTI("[WIFI] Channel: %d\n", WiFi.channel());
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break;
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case 1:
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DEBUG_WIFI_MULTI("[WIFI] Connecting Failed AP not found.\n");
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break;
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case 4:
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DEBUG_WIFI_MULTI("[WIFI] Connecting Failed.\n");
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break;
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default:
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DEBUG_WIFI_MULTI("[WIFI] Connecting Failed (%d).\n", status);
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break;
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}
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} else {
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DEBUG_WIFI_MULTI("[WIFI] no matching wifi found!\n");
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}
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} else {
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// start scan
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DEBUG_WIFI_MULTI("[WIFI] delete old wifi config...\n");
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WiFi.disconnect();
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DEBUG_WIFI_MULTI("[WIFI] start scan\n");
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// scan wifi async mode
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WiFi.scanNetworks(true);
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}
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}
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return status;
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}
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// ##################################################################################
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bool WiFiMulti::APlistAdd(const char* ssid, const char *passphrase)
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{
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WifiAPlist_t newAP;
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if(!ssid || *ssid == 0x00 || strlen(ssid) > 31) {
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// fail SSID to long or missing!
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DEBUG_WIFI_MULTI("[WIFI][APlistAdd] no ssid or ssid to long\n");
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return false;
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}
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if(passphrase && strlen(passphrase) > 63) {
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// fail passphrase to long!
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DEBUG_WIFI_MULTI("[WIFI][APlistAdd] passphrase to long\n");
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return false;
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}
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newAP.ssid = strdup(ssid);
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if(!newAP.ssid) {
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DEBUG_WIFI_MULTI("[WIFI][APlistAdd] fail newAP.ssid == 0\n");
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return false;
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}
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if(passphrase && *passphrase != 0x00) {
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newAP.passphrase = strdup(passphrase);
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if(!newAP.passphrase) {
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DEBUG_WIFI_MULTI("[WIFI][APlistAdd] fail newAP.passphrase == 0\n");
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free(newAP.ssid);
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return false;
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}
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}
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APlist.push_back(newAP);
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DEBUG_WIFI_MULTI("[WIFI][APlistAdd] add SSID: %s\n", newAP.ssid);
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return true;
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}
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void WiFiMulti::APlistClean(void)
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{
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for(uint32_t i = 0; i < APlist.size(); i++) {
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WifiAPlist_t entry = APlist[i];
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if(entry.ssid) {
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free(entry.ssid);
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}
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if(entry.passphrase) {
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free(entry.passphrase);
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}
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}
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APlist.clear();
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}
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