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Code Issues Releases Activity

Added Multicast UDP support

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Fix #1531
This commit is contained in:
Alasdair Allan 2013-08-03 21:01:15 +01:00 committed by Cristian Maglie
parent 59b5311cdf
commit e5805926d0
2 changed files with 35 additions and 0 deletions
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34
libraries/Ethernet/src/EthernetUdp.cpp
View File

@ -216,3 +216,37 @@ void EthernetUDP::flush()
}
}
/* Start EthernetUDP socket, listening at local port PORT */
uint8_t EthernetUDP::beginMulticast(IPAddress ip, uint16_t port)
{
if (_sock != MAX_SOCK_NUM)
return 0;
for (int i = 0; i < MAX_SOCK_NUM; i++) {
uint8_t s = W5100.readSnSR(i);
if (s == SnSR::CLOSED || s == SnSR::FIN_WAIT) {
_sock = i;
break;
}
}
if (_sock == MAX_SOCK_NUM)
return 0;
// Calculate MAC address from Multicast IP Address
byte mac[] = { 0x01, 0x00, 0x5E, 0x00, 0x00, 0x00 };
mac[3] = ip[1] & 0x7F;
mac[4] = ip[2];
mac[5] = ip[3];
W5100.writeSnDIPR(_sock, rawIPAddress(ip)); //239.255.0.1
W5100.writeSnDPORT(_sock, port);
W5100.writeSnDHAR(_sock,mac);
_remaining = 0;
socket(_sock, SnMR::UDP, port, SnMR::MULTI);
return 1;
}

1
libraries/Ethernet/src/EthernetUdp.h
View File

@ -53,6 +53,7 @@ private:
public:
EthernetUDP(); // Constructor
virtual uint8_t begin(uint16_t); // initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
virtual uint8_t beginMulticast(IPAddress, uint16_t); // initialize, start listening on specified port. Returns 1 if successful, 0 if there are no sockets available to use
virtual void stop(); // Finish with the UDP socket
// Sending UDP packets