ESP8266 part of the f105-motor-demo project (see f105-motor-demo_stm32)
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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.
* ----------------------------------------------------------------------------
*/
#include <esp8266.h>
#include "cgiwifi.h"
//Enable this to disallow any changes in AP settings
//#define DEMO_MODE
//WiFi access point data
typedef struct {
char ssid[32];
char bssid[8];
int channel;
char 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;
#define CONNTRY_IDLE 0
#define CONNTRY_WORKING 1
#define CONNTRY_SUCCESS 2
#define CONNTRY_FAIL 3
//Connection result var
static int connTryStatus=CONNTRY_IDLE;
static os_timer_t resetTimer;
//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;
dbg("wifiScanDoneCb %d\n", status);
if (status!=OK) {
cgiWifiAps.scanInProgress=0;
return;
}
//Clear prev ap data if needed.
if (cgiWifiAps.apData!=NULL) {
for (n=0; n<cgiWifiAps.noAps; n++) free(cgiWifiAps.apData[n]);
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 **)malloc(sizeof(ApData *)*n);
cgiWifiAps.noAps=n;
info("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.
warn("Huh? I have more than the allocated %d aps!\n", cgiWifiAps.noAps);
break;
}
//Save the ap data.
cgiWifiAps.apData[n]=(ApData *)malloc(sizeof(ApData));
cgiWifiAps.apData[n]->rssi=bss_link->rssi;
cgiWifiAps.apData[n]->channel=bss_link->channel;
cgiWifiAps.apData[n]->enc=bss_link->authmode;
strncpy(cgiWifiAps.apData[n]->ssid, (char*)bss_link->ssid, 32);
strncpy(cgiWifiAps.apData[n]->bssid, (char*)bss_link->bssid, 6);
bss_link = bss_link->next.stqe_next;
n++;
}
//We're done.
cgiWifiAps.scanInProgress=0;
}
//Routine to start a WiFi access point scan.
static void ICACHE_FLASH_ATTR wifiStartScan() {
// int x;
if (cgiWifiAps.scanInProgress) return;
cgiWifiAps.scanInProgress=1;
wifi_station_scan(NULL, wifiScanDoneCb);
}
//This CGI is called from the bit of AJAX-code in wifi.tpl. It will initiate a
//scan for access points and if available will return the result of an earlier scan.
//The result is embedded in a bit of JSON parsed by the javascript in wifi.tpl.
int ICACHE_FLASH_ATTR cgiWiFiScan(HttpdConnData *connData) {
int pos=(int)connData->cgiData;
int len;
char buff[1024];
if (!cgiWifiAps.scanInProgress && pos!=0) {
//Fill in json code for an access point
if (pos-1<cgiWifiAps.noAps) {
len=sprintf(buff, "{\"essid\": \"%s\", \"bssid\": \"" MACSTR "\", \"rssi\": \"%d\", \"enc\": \"%d\", \"channel\": \"%d\"}%s\n",
cgiWifiAps.apData[pos-1]->ssid, MAC2STR(cgiWifiAps.apData[pos-1]->bssid), cgiWifiAps.apData[pos-1]->rssi,
cgiWifiAps.apData[pos-1]->enc, cgiWifiAps.apData[pos-1]->channel, (pos-1==cgiWifiAps.noAps-1)?"":",");
httpdSend(connData, buff, len);
}
pos++;
if ((pos-1)>=cgiWifiAps.noAps) {
len=sprintf(buff, "]\n}\n}\n");
httpdSend(connData, buff, len);
//Also start a new scan.
wifiStartScan();
return HTTPD_CGI_DONE;
} else {
connData->cgiData=(void*)pos;
return HTTPD_CGI_MORE;
}
}
httpdStartResponse(connData, 200);
httpdHeader(connData, "Content-Type", "text/json");
httpdEndHeaders(connData);
if (cgiWifiAps.scanInProgress==1) {
//We're still scanning. Tell Javascript code that.
len=sprintf(buff, "{\n \"result\": { \n\"inProgress\": \"1\"\n }\n}\n");
httpdSend(connData, buff, len);
return HTTPD_CGI_DONE;
} else {
//We have a scan result. Pass it on.
len=sprintf(buff, "{\n \"result\": { \n\"inProgress\": \"0\", \n\"APs\": [\n");
httpdSend(connData, buff, len);
if (cgiWifiAps.apData==NULL) cgiWifiAps.noAps=0;
connData->cgiData=(void *)1;
return HTTPD_CGI_MORE;
}
}
//Temp store for new ap info.
static struct station_config stconf;
//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.
static void ICACHE_FLASH_ATTR resetTimerCb(void *arg) {
int x=wifi_station_get_connect_status();
if (x==STATION_GOT_IP) {
//Go to STA mode. This needs a reset, so do that.
info("Got IP. Going into STA mode..\n");
wifi_set_opmode(1);
system_restart();
} else {
connTryStatus=CONNTRY_FAIL;
error("Connect fail. Not going into STA-only mode.\n");
//Maybe also pass this through on the webpage?
}
}
//Actually connect to a station. This routine is timed because I had problems
//with immediate connections earlier. It probably was something else that caused it,
//but I can't be arsed to put the code back :P
static void ICACHE_FLASH_ATTR reassTimerCb(void *arg) {
int x;
dbg("Try to connect to AP....\n");
wifi_station_disconnect();
wifi_station_set_config(&stconf);
wifi_station_connect();
x=wifi_get_opmode();
connTryStatus=CONNTRY_WORKING;
if (x!=1) {
//Schedule disconnect/connect
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, 15000, 0); //time out after 15 secs of trying to connect
}
}
//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) {
char essid[128];
char passwd[128];
static os_timer_t reassTimer;
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
httpdFindArg(connData->post->buff, "essid", essid, sizeof(essid));
httpdFindArg(connData->post->buff, "passwd", passwd, sizeof(passwd));
strncpy((char*)stconf.ssid, essid, 32);
strncpy((char*)stconf.password, passwd, 64);
info("Try to connect to AP %s pw %s\n", essid, passwd);
//Schedule disconnect/connect
os_timer_disarm(&reassTimer);
os_timer_setfn(&reassTimer, reassTimerCb, NULL);
//Set to 0 if you want to disable the actual reconnecting bit
#ifdef DEMO_MODE
httpdRedirect(connData, "/wifi");
#else
os_timer_arm(&reassTimer, 500, 0);
httpdRedirect(connData, "connecting.html");
#endif
return HTTPD_CGI_DONE;
}
//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 cgiWiFiSetMode(HttpdConnData *connData) {
int len;
char buff[1024];
if (connData->conn==NULL) {
//Connection aborted. Clean up.
return HTTPD_CGI_DONE;
}
len=httpdFindArg(connData->getArgs, "mode", buff, sizeof(buff));
if (len!=0) {
info("cgiWifiSetMode: %s\n", buff);
#ifndef DEMO_MODE
wifi_set_opmode(atoi(buff));
system_restart();
#endif
}
httpdRedirect(connData, "/wifi");
return HTTPD_CGI_DONE;
}
int ICACHE_FLASH_ATTR cgiWiFiConnStatus(HttpdConnData *connData) {
char buff[1024];
int len;
struct ip_info info;
int st=wifi_station_get_connect_status();
httpdStartResponse(connData, 200);
httpdHeader(connData, "Content-Type", "text/json");
httpdEndHeaders(connData);
if (connTryStatus==CONNTRY_IDLE) {
len=sprintf(buff, "{\n \"status\": \"idle\"\n }\n");
} else if (connTryStatus==CONNTRY_WORKING || connTryStatus==CONNTRY_SUCCESS) {
if (st==STATION_GOT_IP) {
wifi_get_ip_info(0, &info);
len=sprintf(buff, "{\n \"status\": \"success\",\n \"ip\": \"%d.%d.%d.%d\" }\n",
(info.ip.addr>>0)&0xff, (info.ip.addr>>8)&0xff,
(info.ip.addr>>16)&0xff, (info.ip.addr>>24)&0xff);
//Reset into AP-only mode sooner.
os_timer_disarm(&resetTimer);
os_timer_setfn(&resetTimer, resetTimerCb, NULL);
os_timer_arm(&resetTimer, 1000, 0);
} else {
len=sprintf(buff, "{\n \"status\": \"working\"\n }\n");
}
} else {
len=sprintf(buff, "{\n \"status\": \"fail\"\n }\n");
}
httpdSend(connData, buff, len);
return HTTPD_CGI_DONE;
}
//Template code for the WLAN page.
int ICACHE_FLASH_ATTR tplWlan(HttpdConnData *connData, char *token, void **arg) {
char buff[1024];
int x;
static struct station_config stconf;
if (token==NULL) return HTTPD_CGI_DONE;
wifi_station_get_config(&stconf);
strcpy(buff, "Unknown");
if (strcmp(token, "WiFiMode")==0) {
x=wifi_get_opmode();
if (x==1) strcpy(buff, "Client");
if (x==2) strcpy(buff, "SoftAP");
if (x==3) strcpy(buff, "STA+AP");
} else if (strcmp(token, "currSsid")==0) {
strcpy(buff, (char*)stconf.ssid);
} else if (strcmp(token, "WiFiPasswd")==0) {
strcpy(buff, (char*)stconf.password);
} else if (strcmp(token, "WiFiapwarn")==0) {
x=wifi_get_opmode();
if (x==2) {
strcpy(buff, "<b>Can't scan in this mode.</b> Click <a href=\"setmode.cgi?mode=3\">here</a> to go to STA+AP mode.");
} else {
strcpy(buff, "Click <a href=\"setmode.cgi?mode=2\">here</a> to go to standalone AP mode.");
}
}
httpdSend(connData, buff, -1);
return HTTPD_CGI_DONE;
}