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esp-link/src/cgiwifi.c

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/*
Cgi/template routines for the /wifi url.
*/
/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* Jeroen Domburg <jeroen@spritesmods.com> wrote this file. As long as you retain
* this notice you can do whatever you want with this stuff. If we meet some day,
* and you think this stuff is worth it, you can buy me a beer in return.
* ----------------------------------------------------------------------------
* Heavily modified and enhanced by Thorsten von Eicken in 2015
* ----------------------------------------------------------------------------
*/
#include <esp8266.h>
#include "cgiwifi.h"
#include "cgi.h"
#include "status.h"
#include "config.h"
#include "log.h"
#ifdef CGIWIFI_DBG
#define DBG(format, ...) do { os_printf(format, ## __VA_ARGS__); } while(0)
#else
#define DBG(format, ...) do { } while(0)
#endif
# define VERS_STR_STR(V) #V
# define VERS_STR(V) VERS_STR_STR(V)
bool mdns_started = false;
// ===== wifi status change callbacks
static WifiStateChangeCb wifi_state_change_cb[4];
// Temp store for new station config
struct station_config stconf;
// Temp store for new ap config
struct softap_config apconf;
uint8_t wifiState = wifiIsDisconnected;
// reasons for which a connection failed
uint8_t wifiReason = 0;
static char *wifiReasons[] = {
"", "unspecified", "auth_expire", "auth_leave", "assoc_expire", "assoc_toomany", "not_authed",
"not_assoced", "assoc_leave", "assoc_not_authed", "disassoc_pwrcap_bad", "disassoc_supchan_bad",
"ie_invalid", "mic_failure", "4way_handshake_timeout", "group_key_update_timeout",
"ie_in_4way_differs", "group_cipher_invalid", "pairwise_cipher_invalid", "akmp_invalid",
"unsupp_rsn_ie_version", "invalid_rsn_ie_cap", "802_1x_auth_failed", "cipher_suite_rejected",
"beacon_timeout", "no_ap_found" };
static char *wifiMode[] = { 0, "STA", "AP", "AP+STA" };
static char *wifiPhy[] = { 0, "11b", "11g", "11n" };
void (*wifiStatusCb)(uint8_t); // callback when wifi status changes
static char* ICACHE_FLASH_ATTR wifiGetReason(void) {
if (wifiReason <= 24) return wifiReasons[wifiReason];
if (wifiReason >= 200 && wifiReason <= 201) return wifiReasons[wifiReason-200+24];
return wifiReasons[1];
}
// handler for wifi status change callback coming in from espressif library
static void ICACHE_FLASH_ATTR wifiHandleEventCb(System_Event_t *evt) {
switch (evt->event) {
case EVENT_STAMODE_CONNECTED:
wifiState = wifiIsConnected;
wifiReason = 0;
DBG("Wifi connected to ssid %s, ch %d\n", evt->event_info.connected.ssid,
evt->event_info.connected.channel);
statusWifiUpdate(wifiState);
break;
case EVENT_STAMODE_DISCONNECTED:
wifiState = wifiIsDisconnected;
wifiReason = evt->event_info.disconnected.reason;
DBG("Wifi disconnected from ssid %s, reason %s (%d)\n",
evt->event_info.disconnected.ssid, wifiGetReason(), evt->event_info.disconnected.reason);
statusWifiUpdate(wifiState);
break;
case EVENT_STAMODE_AUTHMODE_CHANGE:
DBG("Wifi auth mode: %d -> %d\n",
evt->event_info.auth_change.old_mode, evt->event_info.auth_change.new_mode);
break;
case EVENT_STAMODE_GOT_IP:
wifiState = wifiGotIP;
wifiReason = 0;
DBG("Wifi got ip:" IPSTR ",mask:" IPSTR ",gw:" IPSTR "\n",
IP2STR(&evt->event_info.got_ip.ip), IP2STR(&evt->event_info.got_ip.mask),
IP2STR(&evt->event_info.got_ip.gw));
statusWifiUpdate(wifiState);
if (!mdns_started)
wifiStartMDNS(evt->event_info.got_ip.ip);
break;
case EVENT_SOFTAPMODE_STACONNECTED:
DBG("Wifi AP: station " MACSTR " joined, AID = %d\n",
MAC2STR(evt->event_info.sta_connected.mac), evt->event_info.sta_connected.aid);
break;
case EVENT_SOFTAPMODE_STADISCONNECTED:
DBG("Wifi AP: station " MACSTR " left, AID = %d\n",
MAC2STR(evt->event_info.sta_disconnected.mac), evt->event_info.sta_disconnected.aid);
break;
default:
break;
}
for (int i = 0; i < 4; i++) {
if (wifi_state_change_cb[i] != NULL) (wifi_state_change_cb[i])(wifiState);
}
}
void ICACHE_FLASH_ATTR wifiAddStateChangeCb(WifiStateChangeCb cb) {
for (int i = 0; i < 4; i++) {
if (wifi_state_change_cb[i] == cb) return;
if (wifi_state_change_cb[i] == NULL) {
wifi_state_change_cb[i] = cb;
return;
}
}
DBG("WIFI: max state change cb count exceeded\n");
}
static struct mdns_info *mdns_info;
// See https://github.com/arduino/Arduino/blob/master/arduino-core/src/cc/arduino/packages/discoverers/NetworkDiscovery.java#L155-L168
static char* mdns_txt = "ssh_upload=no";
void ICACHE_FLASH_ATTR wifiStartMDNS(struct ip_addr ip) {
if (flashConfig.mdns_enable) {
if (mdns_info == NULL)
mdns_info = (struct mdns_info *)os_zalloc(sizeof(struct mdns_info));
mdns_info->host_name = flashConfig.hostname;
mdns_info->server_name = flashConfig.mdns_servername;
mdns_info->server_port = 80;
mdns_info->ipAddr = ip.addr;
mdns_info->txt_data[0] = mdns_txt;
espconn_mdns_init(mdns_info);
}
else {
espconn_mdns_server_unregister();
espconn_mdns_close();
if (mdns_info != NULL) {
os_free(mdns_info);
mdns_info = NULL;
}
}
mdns_started = true;
}
// ===== wifi scanning
//WiFi access point data
typedef struct {
char ssid[32];
sint8 rssi;
char enc;
} ApData;
//Scan result
typedef struct {
char scanInProgress; //if 1, don't access the underlying stuff from the webpage.
ApData **apData;
int noAps;
} ScanResultData;
//Static scan status storage.
static ScanResultData cgiWifiAps;
//Callback the code calls when a wlan ap scan is done. Basically stores the result in
//the cgiWifiAps struct.
void ICACHE_FLASH_ATTR wifiScanDoneCb(void *arg, STATUS status) {
int n;
struct bss_info *bss_link = (struct bss_info *)arg;
if (status!=OK) {
DBG("wifiScanDoneCb status=%d\n", status);
cgiWifiAps.scanInProgress=0;
return;
}
//Clear prev ap data if needed.
if (cgiWifiAps.apData!=NULL) {
for (n=0; n<cgiWifiAps.noAps; n++) os_free(cgiWifiAps.apData[n]);
os_free(cgiWifiAps.apData);
}
//Count amount of access points found.
n=0;
while (bss_link != NULL) {
bss_link = bss_link->next.stqe_next;
n++;
}
//Allocate memory for access point data
cgiWifiAps.apData=(ApData **)os_malloc(sizeof(ApData *)*n);
cgiWifiAps.noAps=n;
DBG("Scan done: found %d APs\n", n);
//Copy access point data to the static struct
n=0;
bss_link = (struct bss_info *)arg;
while (bss_link != NULL) {
if (n>=cgiWifiAps.noAps) {
//This means the bss_link changed under our nose. Shouldn't happen!
//Break because otherwise we will write in unallocated memory.
DBG("Huh? I have more than the allocated %d aps!\n", cgiWifiAps.noAps);
break;
}
//Save the ap data.
cgiWifiAps.apData[n]=(ApData *)os_malloc(sizeof(ApData));
cgiWifiAps.apData[n]->rssi=bss_link->rssi;
cgiWifiAps.apData[n]->enc=bss_link->authmode;
strncpy(cgiWifiAps.apData[n]->ssid, (char*)bss_link->ssid, 32);
DBG("bss%d: %s (%d)\n", n+1, (char*)bss_link->ssid, bss_link->rssi);
bss_link = bss_link->next.stqe_next;
n++;
}
//We're done.
cgiWifiAps.scanInProgress=0;
}
static ETSTimer scanTimer;
static void ICACHE_FLASH_ATTR scanStartCb(void *arg) {
DBG("Starting a scan\n");
wifi_station_scan(NULL, wifiScanDoneCb);
}
static int ICACHE_FLASH_ATTR cgiWiFiGetScan(HttpdConnData *connData) {
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
char buff[1460];
const int chunk = 1460/64; // ssid is up to 32 chars
int len = 0;
DBG("GET scan: cgiData=%d noAps=%d\n", (int)connData->cgiData, cgiWifiAps.noAps);
// handle continuation call, connData->cgiData-1 is the position in the scan results where we
// we need to continue sending from (using -1 'cause 0 means it's the first call)
if (connData->cgiData) {
int next = (int)connData->cgiData-1;
int pos = next;
while (pos < cgiWifiAps.noAps && pos < next+chunk) {
len += os_sprintf(buff+len, "{\"essid\": \"%s\", \"rssi\": %d, \"enc\": \"%d\"}%c\n",
cgiWifiAps.apData[pos]->ssid, cgiWifiAps.apData[pos]->rssi, cgiWifiAps.apData[pos]->enc,
(pos+1 == cgiWifiAps.noAps) ? ' ' : ',');
pos++;
}
// done or more?
if (pos == cgiWifiAps.noAps) {
len += os_sprintf(buff+len, "]}}\n");
httpdSend(connData, buff, len);
return HTTPD_CGI_DONE;
} else {
connData->cgiData = (void*)(pos+1);
httpdSend(connData, buff, len);
return HTTPD_CGI_MORE;
}
}
jsonHeader(connData, 200);
if (cgiWifiAps.scanInProgress==1) {
//We're still scanning. Tell Javascript code that.
len = os_sprintf(buff, "{\n \"result\": { \n\"inProgress\": \"1\"\n }\n}\n");
httpdSend(connData, buff, len);
return HTTPD_CGI_DONE;
}
len = os_sprintf(buff, "{\"result\": {\"inProgress\": \"0\", \"APs\": [\n");
connData->cgiData = (void *)1; // start with first result next time we're called
httpdSend(connData, buff, len);
return HTTPD_CGI_MORE;
}
// Start scanning, without parameters
void ICACHE_FLASH_ATTR wifiStartScan() {
if (!cgiWifiAps.scanInProgress) {
cgiWifiAps.scanInProgress = 1;
os_timer_disarm(&scanTimer);
os_timer_setfn(&scanTimer, scanStartCb, NULL);
os_timer_arm(&scanTimer, 200, 0);
}
}
// Start scanning, web interface
int ICACHE_FLASH_ATTR cgiWiFiStartScan(HttpdConnData *connData) {
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
jsonHeader(connData, 200);
// Don't duplicate code, reuse the function above.
wifiStartScan();
return HTTPD_CGI_DONE;
}
int ICACHE_FLASH_ATTR cgiWiFiScan(HttpdConnData *connData) {
if (connData->requestType == HTTPD_METHOD_GET) {
return cgiWiFiGetScan(connData);
}else if(connData->requestType == HTTPD_METHOD_POST) {
// DO NOT start APs scan in AP mode
int mode = wifi_get_opmode();
if(mode==2){
jsonHeader(connData, 400);
return HTTPD_CGI_DONE;
}else{
return cgiWiFiStartScan(connData);
}
}else{
jsonHeader(connData, 404);
return HTTPD_CGI_DONE;
}
}
// ===== timers to change state and rescue from failed associations
// reset timer changes back to STA+AP if we can't associate
#define RESET_TIMEOUT (15000) // 15 seconds
static ETSTimer resetTimer;
// This routine is ran some time after a connection attempt to an access point. If
// the connect succeeds, this gets the module in STA-only mode. If it fails, it ensures
// that the module is in STA+AP mode so the user has a chance to recover.
static void ICACHE_FLASH_ATTR resetTimerCb(void *arg) {
int x = wifi_station_get_connect_status();
int m = wifi_get_opmode() & 0x3;
DBG("Wifi check: mode=%s status=%d\n", wifiMode[m], x);
if (m == 2) return; // 2=AP, in AP-only mode we don't do any auto-switching
if ( x == STATION_GOT_IP ) {
// if we got an IP we could switch to STA-only...
if (m != 1) { // 1=STA
#ifdef CHANGE_TO_STA
// We're happily connected, go to STA mode
DBG("Wifi got IP. Going into STA mode..\n");
wifi_set_opmode(1);
os_timer_arm(&resetTimer, RESET_TIMEOUT, 0); // check one more time after switching to STA-only
#endif
}
log_uart(false);
// no more resetTimer at this point, gotta use physical reset to recover if in trouble
} else {
// we don't have an IP address
if (m != 3) {
DBG("Wifi connect failed. Going into STA+AP mode..\n");
wifi_set_opmode(3);
wifi_softap_set_config(&apconf);
}
log_uart(true);
DBG("Enabling/continuing uart log\n");
os_timer_arm(&resetTimer, RESET_TIMEOUT, 0);
}
}
// Reassociate timer to delay change of association so the original request can finish
static ETSTimer reassTimer;
// Callback actually doing reassociation
static void ICACHE_FLASH_ATTR reassTimerCb(void *arg) {
DBG("Wifi changing association\n");
wifi_station_disconnect();
stconf.bssid_set = 0;
wifi_station_set_config(&stconf);
wifi_station_connect();
// Schedule check, we give some extra time (4x) 'cause the reassociation can cause the AP
// to have to change channel, and then the client needs to follow before it can see the
// IP address
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, 4*RESET_TIMEOUT, 0);
}
// Kick off connection to some network
void ICACHE_FLASH_ATTR connectToNetwork(char *ssid, char *pass) {
os_strncpy((char*)stconf.ssid, ssid, 32);
os_strncpy((char*)stconf.password, pass, 64);
DBG("Wifi try to connect to AP %s pw %s\n", ssid, pass);
// Schedule disconnect/connect
os_timer_disarm(&reassTimer);
os_timer_setfn(&reassTimer, reassTimerCb, NULL);
os_timer_arm(&reassTimer, 1000, 0); // 1 second for the response of this request to make it
}
// This cgi uses the routines above to connect to a specific access point with the
// given ESSID using the given password.
int ICACHE_FLASH_ATTR cgiWiFiConnect(HttpdConnData *connData) {
int mode = wifi_get_opmode();
if(mode == 2){
jsonHeader(connData, 400);
httpdSend(connData, "Can't associate to an AP en SoftAP mode", -1);
return HTTPD_CGI_DONE;
}
char essid[128];
char passwd[128];
if (connData->conn==NULL) return HTTPD_CGI_DONE;
int el = httpdFindArg(connData->getArgs, "essid", essid, sizeof(essid));
int pl = httpdFindArg(connData->getArgs, "passwd", passwd, sizeof(passwd));
if (el > 0 && pl >= 0) {
//Set to 0 if you want to disable the actual reconnecting bit
connectToNetwork(essid, passwd);
jsonHeader(connData, 200);
} else {
jsonHeader(connData, 400);
httpdSend(connData, "Cannot parse ssid or password", -1);
}
return HTTPD_CGI_DONE;
}
static bool ICACHE_FLASH_ATTR parse_ip(char *buff, ip_addr_t *ip_ptr) {
char *next = buff; // where to start parsing next integer
int found = 0; // number of integers parsed
uint32_t ip = 0; // the ip addres parsed
for (int i=0; i<32; i++) { // 32 is just a safety limit
char c = buff[i];
if (c == '.' || c == 0) {
// parse the preceding integer and accumulate into IP address
bool last = c == 0;
buff[i] = 0;
uint32_t v = atoi(next);
ip = ip | ((v&0xff)<<(found*8));
next = buff+i+1; // next integer starts after the '.'
found++;
if (last) { // if at end of string we better got 4 integers
ip_ptr->addr = ip;
return found == 4;
}
continue;
}
if (c < '0' || c > '9') return false;
}
return false;
}
#ifdef DEBUGIP
static void ICACHE_FLASH_ATTR debugIP() {
struct ip_info info;
if (wifi_get_ip_info(0, &info)) {
DBG("\"ip\": \"%d.%d.%d.%d\"\n", IP2STR(&info.ip.addr));
DBG("\"netmask\": \"%d.%d.%d.%d\"\n", IP2STR(&info.netmask.addr));
DBG("\"gateway\": \"%d.%d.%d.%d\"\n", IP2STR(&info.gw.addr));
DBG("\"hostname\": \"%s\"\n", wifi_station_get_hostname());
} else {
DBG("\"ip\": \"-none-\"\n");
}
}
#endif
// configure Wifi, specifically DHCP vs static IP address based on flash config
void ICACHE_FLASH_ATTR configWifiIP() {
if (flashConfig.staticip == 0) {
// let's DHCP!
wifi_station_set_hostname(flashConfig.hostname);
if (wifi_station_dhcpc_status() == DHCP_STARTED)
wifi_station_dhcpc_stop();
wifi_station_dhcpc_start();
DBG("Wifi uses DHCP, hostname=%s\n", flashConfig.hostname);
} else {
// no DHCP, we got static network config!
wifi_station_dhcpc_stop();
struct ip_info ipi;
ipi.ip.addr = flashConfig.staticip;
ipi.netmask.addr = flashConfig.netmask;
ipi.gw.addr = flashConfig.gateway;
wifi_set_ip_info(0, &ipi);
DBG("Wifi uses static IP %d.%d.%d.%d\n", IP2STR(&ipi.ip.addr));
}
#ifdef DEBUGIP
debugIP();
#endif
}
// Change special settings
int ICACHE_FLASH_ATTR cgiWiFiSpecial(HttpdConnData *connData) {
char dhcp[8];
char staticip[20];
char netmask[20];
char gateway[20];
if (connData->conn==NULL) return HTTPD_CGI_DONE;
// get args and their string lengths
int dl = httpdFindArg(connData->getArgs, "dhcp", dhcp, sizeof(dhcp));
int sl = httpdFindArg(connData->getArgs, "staticip", staticip, sizeof(staticip));
int nl = httpdFindArg(connData->getArgs, "netmask", netmask, sizeof(netmask));
int gl = httpdFindArg(connData->getArgs, "gateway", gateway, sizeof(gateway));
if (!(dl > 0 && sl >= 0 && nl >= 0 && gl >= 0)) {
jsonHeader(connData, 400);
httpdSend(connData, "Request is missing fields", -1);
return HTTPD_CGI_DONE;
}
char url[64]; // redirect URL
if (os_strcmp(dhcp, "off") == 0) {
// parse static IP params
struct ip_info ipi;
bool ok = parse_ip(staticip, &ipi.ip);
if (nl > 0) ok = ok && parse_ip(netmask, &ipi.netmask);
else IP4_ADDR(&ipi.netmask, 255, 255, 255, 0);
if (gl > 0) ok = ok && parse_ip(gateway, &ipi.gw);
else ipi.gw.addr = 0;
if (!ok) {
jsonHeader(connData, 400);
httpdSend(connData, "Cannot parse static IP config", -1);
return HTTPD_CGI_DONE;
}
// save the params in flash
flashConfig.staticip = ipi.ip.addr;
flashConfig.netmask = ipi.netmask.addr;
flashConfig.gateway = ipi.gw.addr;
// construct redirect URL
os_sprintf(url, "{\"url\": \"http://%d.%d.%d.%d\"}", IP2STR(&ipi.ip));
} else {
// dynamic IP
flashConfig.staticip = 0;
os_sprintf(url, "{\"url\": \"http://%s\"}", flashConfig.hostname);
}
configSave(); // ignore error...
// schedule change-over
os_timer_disarm(&reassTimer);
os_timer_setfn(&reassTimer, configWifiIP, NULL);
os_timer_arm(&reassTimer, 1000, 0); // 1 second for the response of this request to make it
// return redirect info
jsonHeader(connData, 200);
httpdSend(connData, url, -1);
return HTTPD_CGI_DONE;
}
// ==== Soft-AP related functions
// Change Soft-AP main settings
int ICACHE_FLASH_ATTR cgiApSettingsChange(HttpdConnData *connData) {
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
// No changes for Soft-AP in STA mode
int mode = wifi_get_opmode();
if ( mode == 1 ){
jsonHeader(connData, 400);
httpdSend(connData, "No changes allowed in STA mode", -1);
return HTTPD_CGI_DONE;
}
char buff[96];
int len;
// Check extra security measure, this must be 1
len=httpdFindArg(connData->getArgs, "100", buff, sizeof(buff));
if(len>0){
if(atoi(buff)!=1){
jsonHeader(connData, 400);
return HTTPD_CGI_DONE;
}
}
// Set new SSID
len=httpdFindArg(connData->getArgs, "ap_ssid", buff, sizeof(buff));
if(checkString(buff) && len>0 && len<=32){
// STRING PREPROCESSING DONE IN CLIENT SIDE
os_memset(apconf.ssid, 0, 32);
os_memcpy(apconf.ssid, buff, len);
apconf.ssid_len = len;
}else{
jsonHeader(connData, 400);
httpdSend(connData, "SSID not valid or out of range", -1);
return HTTPD_CGI_DONE;
}
// Set new PASSWORD
len=httpdFindArg(connData->getArgs, "ap_password", buff, sizeof(buff));
os_memset(apconf.password, 0, 64);
if (checkString(buff) && len>7 && len<=64) {
// String preprocessing done in client side, wifiap.js line 31
os_memcpy(apconf.password, buff, len);
DBG("Setting AP password len=%d\n", len);
} else if (len != 0) {
jsonHeader(connData, 400);
httpdSend(connData, "PASSWORD not valid or out of range", -1);
return HTTPD_CGI_DONE;
}
// Set auth mode
if (len != 0) {
// Set authentication mode, before password to check open settings
len=httpdFindArg(connData->getArgs, "ap_authmode", buff, sizeof(buff));
if (len > 0) {
int value = atoi(buff);
if (value > 0 && value <= 4) {
apconf.authmode = value;
} else {
// If out of range set by default
DBG("Forcing AP authmode to WPA_WPA2_PSK\n");
apconf.authmode = 4;
}
} else {
// Valid password but wrong auth mode, default 4
DBG("Forcing AP authmode to WPA_WPA2_PSK\n");
apconf.authmode = 4;
}
} else {
apconf.authmode = 0;
}
DBG("Setting AP authmode=%d\n", apconf.authmode);
// Set max connection number
len=httpdFindArg(connData->getArgs, "ap_maxconn", buff, sizeof(buff));
if(len>0){
int value = atoi(buff);
if(value > 0 && value <= 4){
apconf.max_connection = value;
}else{
// If out of range, set by default
apconf.max_connection = 4;
}
}
// Set beacon interval value
len=httpdFindArg(connData->getArgs, "ap_beacon", buff, sizeof(buff));
if(len>0){
int value = atoi(buff);
if(value >= 100 && value <= 60000){
apconf.beacon_interval = value;
}else{
// If out of range, set by default
apconf.beacon_interval = 100;
}
}
// Set ssid to be hidden or not
len=httpdFindArg(connData->getArgs, "ap_hidden", buff, sizeof(buff));
if(len>0){
int value = atoi(buff);
if(value == 0 || value == 1){
apconf.ssid_hidden = value;
}else{
// If out of range, set by default
apconf.ssid_hidden = 0;
}
}
// Store new configuration
wifi_softap_set_config(&apconf);
jsonHeader(connData, 200);
return HTTPD_CGI_DONE;
}
// Get current Soft-AP settings
int ICACHE_FLASH_ATTR cgiApSettingsInfo(HttpdConnData *connData) {
char buff[1024];
if (connData->conn == NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
os_sprintf(buff,
"{ "
"\"ap_ssid\": \"%s\", "
"\"ap_password\": \"%s\", "
"\"ap_authmode\": %d, "
"\"ap_maxconn\": %d, "
"\"ap_beacon\": %d, "
"\"ap_hidden\": \"%s\" "
" }",
apconf.ssid,
apconf.password,
apconf.authmode,
apconf.max_connection,
apconf.beacon_interval,
apconf.ssid_hidden ? "enabled" : "disabled"
);
jsonHeader(connData, 200);
httpdSend(connData, buff, -1);
return HTTPD_CGI_DONE;
}
//This cgi changes the operating mode: STA / AP / STA+AP
int ICACHE_FLASH_ATTR cgiWiFiSetMode(HttpdConnData *connData) {
int len;
char buff[1024];
int previous_mode = wifi_get_opmode();
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
len=httpdFindArg(connData->getArgs, "mode", buff, sizeof(buff));
int next_mode = atoi(buff);
if (len!=0) {
if (next_mode == 2){
// moving to AP mode, so disconnect before leave STA mode
wifi_station_disconnect();
}
DBG("Wifi switching to mode %d\n", next_mode);
wifi_set_opmode(next_mode&3);
if (previous_mode == 2) {
// moving to STA or STA+AP mode from AP, try to connect and set timer
stconf.bssid_set = 0;
wifi_station_set_config(&stconf);
wifi_station_connect();
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, RESET_TIMEOUT, 0);
}
if(previous_mode == 1){
// moving to AP or STA+AP from STA, so softap config call needed
wifi_softap_set_config(&apconf);
}
jsonHeader(connData, 200);
} else {
jsonHeader(connData, 400);
}
return HTTPD_CGI_DONE;
}
static char *connStatuses[] = { "idle", "connecting", "wrong password", "AP not found",
"failed", "got IP address" };
static char *wifiWarn[] = { 0,
"Switch to <a href=\\\"#\\\" onclick=\\\"changeWifiMode(3)\\\">STA+AP mode</a>",
"Switch to <a href=\\\"#\\\" onclick=\\\"changeWifiMode(3)\\\">STA+AP mode</a>",
"Switch to <a href=\\\"#\\\" onclick=\\\"changeWifiMode(1)\\\">STA mode</a>",
"Switch to <a href=\\\"#\\\" onclick=\\\"changeWifiMode(2)\\\">AP mode</a>",
};
static char *apAuthMode[] = { "OPEN",
"WEP",
"WPA_PSK",
"WPA2_PSK",
"WPA_WPA2_PSK",
};
#ifdef CHANGE_TO_STA
#define MODECHANGE "yes"
#else
#define MODECHANGE "no"
#endif
// print various Wifi information into json buffer
int ICACHE_FLASH_ATTR printWifiInfo(char *buff) {
int len;
//struct station_config stconf;
wifi_station_get_config(&stconf);
//struct softap_config apconf;
wifi_softap_get_config(&apconf);
uint8_t op = wifi_get_opmode() & 0x3;
char *mode = wifiMode[op];
char *status = "unknown";
int st = wifi_station_get_connect_status();
if (st >= 0 && st < sizeof(connStatuses)) status = connStatuses[st];
int p = wifi_get_phy_mode();
char *phy = wifiPhy[p&3];
char *warn = wifiWarn[op];
if (op == 3) op = 4; // Done to let user switch to AP only mode from Soft-AP settings page, using only one set of warnings
char *apwarn = wifiWarn[op];
char *apauth = apAuthMode[apconf.authmode];
sint8 rssi = wifi_station_get_rssi();
if (rssi > 0) rssi = 0;
uint8 mac_addr[6];
uint8 apmac_addr[6];
wifi_get_macaddr(0, mac_addr);
wifi_get_macaddr(1, apmac_addr);
uint8_t chan = wifi_get_channel();
len = os_sprintf(buff,
"\"mode\": \"%s\", \"modechange\": \"%s\", \"ssid\": \"%s\", \"status\": \"%s\", "
"\"phy\": \"%s\", \"rssi\": \"%ddB\", \"warn\": \"%s\", \"apwarn\": \"%s\", "
"\"mac\":\"%02x:%02x:%02x:%02x:%02x:%02x\", \"chan\":\"%d\", \"apssid\": \"%s\", "
"\"appass\": \"%s\", \"apchan\": \"%d\", \"apmaxc\": \"%d\", \"aphidd\": \"%s\", "
"\"apbeac\": \"%d\", \"apauth\": \"%s\",\"apmac\":\"%02x:%02x:%02x:%02x:%02x:%02x\"",
mode, MODECHANGE, (char*)stconf.ssid, status, phy, rssi, warn, apwarn,
mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5],
chan, (char*)apconf.ssid, (char*)apconf.password, apconf.channel, apconf.max_connection,
apconf.ssid_hidden?"enabled":"disabled", apconf.beacon_interval,
apauth,apmac_addr[0], apmac_addr[1], apmac_addr[2], apmac_addr[3], apmac_addr[4],
apmac_addr[5]);
struct ip_info info;
if (wifi_get_ip_info(0, &info)) {
len += os_sprintf(buff+len, ", \"ip\": \"%d.%d.%d.%d\"", IP2STR(&info.ip.addr));
len += os_sprintf(buff+len, ", \"netmask\": \"%d.%d.%d.%d\"", IP2STR(&info.netmask.addr));
len += os_sprintf(buff+len, ", \"gateway\": \"%d.%d.%d.%d\"", IP2STR(&info.gw.addr));
len += os_sprintf(buff+len, ", \"hostname\": \"%s\"", flashConfig.hostname);
} else {
len += os_sprintf(buff+len, ", \"ip\": \"-none-\"");
}
len += os_sprintf(buff+len, ", \"staticip\": \"%d.%d.%d.%d\"", IP2STR(&flashConfig.staticip));
len += os_sprintf(buff+len, ", \"dhcp\": \"%s\"", flashConfig.staticip > 0 ? "off" : "on");
return len;
}
int ICACHE_FLASH_ATTR cgiWiFiConnStatus(HttpdConnData *connData) {
char buff[1024];
int len;
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
jsonHeader(connData, 200);
len = os_sprintf(buff, "{");
len += printWifiInfo(buff+len);
len += os_sprintf(buff+len, ", ");
if (wifiReason != 0) {
len += os_sprintf(buff+len, "\"reason\": \"%s\", ", wifiGetReason());
}
#if 0
// commented out 'cause often the client that requested the change can't get a request in to
// find out that it succeeded. Better to just wait the std 15 seconds...
int st=wifi_station_get_connect_status();
if (st == STATION_GOT_IP) {
if (wifi_get_opmode() != 1) {
// Reset into AP-only mode sooner.
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, 1000, 0);
}
}
#endif
len += os_sprintf(buff+len, "\"x\":0}\n");
//DBG(" -> %s\n", buff);
httpdSend(connData, buff, len);
return HTTPD_CGI_DONE;
}
// Cgi to return various Wifi information
int ICACHE_FLASH_ATTR cgiWifiInfo(HttpdConnData *connData) {
char buff[1024];
if (connData->conn==NULL) return HTTPD_CGI_DONE; // Connection aborted. Clean up.
os_strcpy(buff, "{");
printWifiInfo(buff+1);
os_strcat(buff, "}");
jsonHeader(connData, 200);
httpdSend(connData, buff, -1);
return HTTPD_CGI_DONE;
}
// Check string againt invalid characters
int ICACHE_FLASH_ATTR checkString(char *str){
for(int i=0; i<os_strlen(str); i++) {
// We allow any printable character
if (str[i] < '!' || str[i] > '~') {
DBG("Error: String has non alphanumeric chars\n");
return 0;
}
}
return 1;
}
/* Init the wireless
*
* Call both Soft-AP and Station default config
* Change values according to Makefile hard-coded variables
* Anyway set wifi opmode to STA+AP, it will change to STA if CHANGE_TO_STA is set to yes in Makefile
* Call a timer to check the STA connection
*/
void ICACHE_FLASH_ATTR wifiInit() {
// Check the wifi opmode
int x = wifi_get_opmode() & 0x3;
// If STA is enabled switch to STA+AP to allow for recovery, it will then switch to STA-only
// once it gets an IP address
if (x == 1) wifi_set_opmode(3);
// Call both STATION and SOFTAP default config
wifi_station_get_config_default(&stconf);
wifi_softap_get_config_default(&apconf);
DBG("Wifi init, mode=%s\n",wifiMode[x]);
// Change STATION parameters, if defined in the Makefile
#if defined(STA_SSID) && defined(STA_PASS)
// Set parameters
if (os_strlen((char*)stconf.ssid) == 0 && os_strlen((char*)stconf.password) == 0) {
os_strncpy((char*)stconf.ssid, VERS_STR(STA_SSID), 32);
os_strncpy((char*)stconf.password, VERS_STR(STA_PASS), 64);
wifi_set_opmode(3);
DBG("Wifi pre-config trying to connect to AP %s pw %s\n",(char*)stconf.ssid, (char*)stconf.password);
// wifi_set_phy_mode(2); // limit to 802.11b/g 'cause n is flaky
stconf.bssid_set = 0;
wifi_station_set_config(&stconf);
}
#endif
// Change SOFT_AP settings, if defined in Makefile
#if defined(AP_SSID)
// Check if ssid and pass are alphanumeric values
int ssidlen = os_strlen(VERS_STR(AP_SSID));
if(checkString(VERS_STR(AP_SSID)) && ssidlen > 7 && ssidlen < 32){
// Clean memory and set the value of SSID
os_memset(apconf.ssid, 0, 32);
os_memcpy(apconf.ssid, VERS_STR(AP_SSID), os_strlen(VERS_STR(AP_SSID)));
// Specify the length of ssid
apconf.ssid_len= ssidlen;
#if defined(AP_PASS)
// If pass is at least 8 and less than 64
int passlen = os_strlen(VERS_STR(AP_PASS));
if( checkString(VERS_STR(AP_PASS)) && passlen > 7 && passlen < 64 ){
// Clean memory and set the value of PASS
os_memset(apconf.password, 0, 64);
os_memcpy(apconf.password, VERS_STR(AP_PASS), passlen);
// Can't choose auth mode without a valid ssid and password
#ifdef AP_AUTH_MODE
// If set, use specified auth mode
if(AP_AUTH_MODE >= 0 && AP_AUTH_MODE <=4)
apconf.authmode = AP_AUTH_MODE;
#else
// If not, use WPA2
apconf.authmode = AUTH_WPA_WPA2_PSK;
#endif
}else if ( passlen == 0){
// If ssid is ok and no pass, set auth open
apconf.authmode = AUTH_OPEN;
// Remove stored password
os_memset(apconf.password, 0, 64);
}
#endif
}// end of ssid and pass check
#ifdef AP_SSID_HIDDEN
// If set, use specified ssid hidden parameter
if(AP_SSID_HIDDEN == 0 || AP_SSID_HIDDEN ==1)
apconf.ssid_hidden = AP_SSID_HIDDEN;
#endif
#ifdef AP_MAX_CONN
// If set, use specified max conn number
if(AP_MAX_CONN > 0 && AP_MAX_CONN <5)
apconf.max_connection = AP_MAX_CONN;
#endif
#ifdef AP_BEACON_INTERVAL
// If set use specified beacon interval
if(AP_BEACON_INTERVAL >= 100 && AP_BEACON_INTERVAL <= 60000)
apconf.beacon_interval = AP_BEACON_INTERVAL;
#endif
// Check softap config
bool softap_set_conf = wifi_softap_set_config(&apconf);
// Debug info
DBG("Wifi Soft-AP parameters change: %s\n",softap_set_conf? "success":"fail");
#endif // if defined(AP_SSID)
configWifiIP();
// The default sleep mode should be modem_sleep, but we set it here explicitly for good
// measure. We can't use light_sleep because that powers off everthing and we would loose
// all connections.
wifi_set_sleep_type(MODEM_SLEEP_T);
wifi_set_event_handler_cb(wifiHandleEventCb);
// check on the wifi in a few seconds to see whether we need to switch mode
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, RESET_TIMEOUT, 0);
}
// Access functions for cgiWifiAps : query the number of entries in the table
int ICACHE_FLASH_ATTR wifiGetApCount() {
if (cgiWifiAps.scanInProgress)
return 0;
return cgiWifiAps.noAps;
}
// Access functions for cgiWifiAps : returns the name of a network, i is the index into the array, return stored in memory pointed to by ptr.
ICACHE_FLASH_ATTR void wifiGetApName(int i, char *ptr) {
if (i < 0)
return;
if (i >= cgiWifiAps.noAps)
return;
if (ptr != 0)
strncpy(ptr, cgiWifiAps.apData[i]->ssid, 32);
DBG("AP %s\n", cgiWifiAps.apData[i]->ssid);
}
// Access functions for cgiWifiAps : returns the signal strength of network (i is index into array). Return current network strength for negative i.
ICACHE_FLASH_ATTR int wifiSignalStrength(int i) {
sint8 rssi;
if (i < 0 || i == 255)
rssi = wifi_station_get_rssi(); // Current network's signal strength
else if (i >= cgiWifiAps.noAps)
rssi = 0; // FIX ME
else
rssi = cgiWifiAps.apData[i]->rssi; // Signal strength of any known network
return rssi;
}