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Detects when ethernet cable is connected and is disconnected, also correctly handles EthernetServer tead down on such situations

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This commit is contained in:
Bruno Crivelari Sanches 2022-09-05 14:23:54 -03:00
parent 34c3d10767
commit 64b1de08be
2 changed files with 62 additions and 17 deletions
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74
EthernetInterface.cpp
View File

@ -41,6 +41,7 @@ void EthernetInterface::setup()
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
DIAG(F("Ethernet shield not found"));
delete singleton;
singleton=NULL;
return;
@ -71,13 +72,24 @@ EthernetInterface::EthernetInterface()
#endif
}
/**
* @brief Cleanup any resources
*
* @return none
*/
EthernetInterface::~EthernetInterface()
{
delete server;
delete outboundRing;
}
/**
* @brief Main loop for the EthernetInterface
*
*/
void EthernetInterface::loop()
{
if(!singleton || ((!singleton->connected) && (!singleton->checkLink())))
if(!singleton || (!singleton->checkLink()))
return;
switch (Ethernet.maintain())
@ -103,26 +115,58 @@ void EthernetInterface::loop()
}
/**
* @brief Checks ethernet link cable status and detects when it connects / disconnects
*
* @return true when cable is connected, false otherwise
*/
bool EthernetInterface::checkLink()
{
if (Ethernet.linkStatus() != LinkON)
return false;
DIAG(F("Ethernet cable connected"));
if (Ethernet.linkStatus() == LinkON)
{
//if we are not connected yet, setup a new server
if(!connected)
{
DIAG(F("Ethernet cable connected"));
connected=true;
IPAddress ip = Ethernet.localIP(); // reassign the obtained ip address
connected=true;
IPAddress ip = Ethernet.localIP(); // reassign the obtained ip address
server = new EthernetServer(IP_PORT); // Ethernet Server listening on default port IP_PORT
server->begin();
LCD(4,F("IP: %d.%d.%d.%d"), ip[0], ip[1], ip[2], ip[3]);
LCD(5,F("Port:%d"), IP_PORT);
server = new EthernetServer(IP_PORT); // Ethernet Server listening on default port IP_PORT
server->begin();
LCD(4,F("IP: %d.%d.%d.%d"), ip[0], ip[1], ip[2], ip[3]);
LCD(5,F("Port:%d"), IP_PORT);
outboundRing=new RingStream(OUTBOUND_RING_SIZE);
//
//only create a outboundRing it none exists, this may happen if the cable gets disconnected and connected again
if(!outboundRing)
outboundRing=new RingStream(OUTBOUND_RING_SIZE);
}
return true;
return true;
}
else if(connected)
{
DIAG(F("Ethernet cable disconnected"));
connected=false;
//clean up any client
for (byte socket = 0; socket < MAX_SOCK_NUM; socket++)
{
if(clients[socket].connected())
clients[socket].stop();
}
/* tear down server */
delete server;
server = nullptr;
LCD(4,F("IP: None"));
}
return false;
}
void EthernetInterface::loop2()

5
EthernetInterface.h
View File

@ -59,14 +59,15 @@ class EthernetInterface {
static EthernetInterface * singleton;
bool connected;
EthernetInterface();
~EthernetInterface();
void loop2();
bool checkLink();
EthernetServer * server;
EthernetServer * server = nullptr;
EthernetClient clients[MAX_SOCK_NUM]; // accept up to MAX_SOCK_NUM client connections at the same time; This depends on the chipset used on the Shield
uint8_t buffer[MAX_ETH_BUFFER+1]; // buffer used by TCP for the recv
RingStream * outboundRing;
RingStream * outboundRing = nullptr;
};