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Better handling of wifi disconnect (#231)

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When network interface is down, some nasty things happen, for instance tcp_connect returns without ever calling error callback.
This change adds some workarounds for that: before doing a tcp connect and DNS resolve we check if there is a route available.
Also added a listener for wifi events which stops (aborts) all the WiFiClients and WiFiUDPs when wifi is disconnected. This should
help libraries detect disconnect properly.
This commit is contained in:
Ivan Grokhotkov
2015-06-11 18:01:08 +03:00
parent 567d401ed3
commit e6e57a8b81
7 changed files with 118 additions and 12 deletions
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26
libraries/ESP8266WiFi/src/ESP8266WiFi.cpp
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@ -33,6 +33,8 @@ extern "C" {
#include "lwip/dns.h"
}
#include "WiFiClient.h"
#include "WiFiUdp.h"
extern "C" void esp_schedule();
extern "C" void esp_yield();
@ -42,6 +44,7 @@ ESP8266WiFiClass::ESP8266WiFiClass()
, _useClientMode(false)
, _useStaticIp(false)
{
wifi_set_event_handler_cb((wifi_event_handler_cb_t)&ESP8266WiFiClass::_eventCallback);
}
void ESP8266WiFiClass::mode(WiFiMode m)
@ -104,8 +107,8 @@ int ESP8266WiFiClass::begin(const char* ssid, const char *passphrase, int32_t ch
wifi_set_channel(channel);
}
if(!_useStaticIp)
wifi_station_dhcpc_start();
if(!_useStaticIp)
wifi_station_dhcpc_start();
return status();
}
@ -128,8 +131,8 @@ void ESP8266WiFiClass::config(IPAddress local_ip, IPAddress gateway, IPAddress s
wifi_station_dhcpc_stop();
wifi_set_ip_info(STATION_IF, &info);
_useStaticIp = true;
_useStaticIp = true;
}
void ESP8266WiFiClass::config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns)
@ -146,8 +149,8 @@ void ESP8266WiFiClass::config(IPAddress local_ip, IPAddress gateway, IPAddress s
ip_addr_t d;
d.addr = static_cast<uint32_t>(dns);
dns_setserver(0,&d);
_useStaticIp = true;
_useStaticIp = true;
}
int ESP8266WiFiClass::disconnect()
@ -588,6 +591,17 @@ void ESP8266WiFiClass::_smartConfigCallback(uint32_t st, void* result)
}
}
void ESP8266WiFiClass::_eventCallback(void* arg)
{
System_Event_t* event = reinterpret_cast<System_Event_t*>(arg);
DEBUGV("wifi evt: %d\r\n", event->event);
if (event->event == EVENT_STAMODE_DISCONNECTED) {
WiFiClient::stopAll();
WiFiUDP::stopAll();
}
}
void ESP8266WiFiClass::printDiag(Print& p)
{
const char* modes[] = {"NULL", "STA", "AP", "STA+AP"};