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Code Activity

udp: restore correct address/port when parsing packet (#6011)

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do interleave informations on addresses within reception pbuf chain:
before: (data-pbuf) -> (data-pbuf) -> (data-pbuf) -> ... in the receiving order
now: (address+port-info-pbuf -> data-pbuf) -> (address_port-info-pbuf -> data-pbuf) -> ...

address/port informations are updated along with data exposed to user
This commit is contained in:
david gauchard
2019-04-26 20:09:23 +02:00
committed by GitHub
parent f6dd826437
commit 5dd780c571
2 changed files with 91 additions and 53 deletions
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24
libraries/ESP8266WiFi/examples/Udp/Udp.ino
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@ -26,7 +26,7 @@
unsigned int localPort = 8888; // local port to listen on
// buffers for receiving and sending data
char packetBuffer[UDP_TX_PACKET_MAX_SIZE]; //buffer to hold incoming packet,
char packetBuffer[UDP_TX_PACKET_MAX_SIZE + 1]; //buffer to hold incoming packet,
char ReplyBuffer[] = "acknowledged\r\n"; // a string to send back
WiFiUDP Udp;
@ -49,21 +49,15 @@ void loop() {
// if there's data available, read a packet
int packetSize = Udp.parsePacket();
if (packetSize) {
Serial.print("Received packet of size ");
Serial.println(packetSize);
Serial.print("From ");
IPAddress remote = Udp.remoteIP();
for (int i = 0; i < 4; i++) {
Serial.print(remote[i], DEC);
if (i < 3) {
Serial.print(".");
}
}
Serial.print(", port ");
Serial.println(Udp.remotePort());
Serial.printf("Received packet of size %d from %s:%d\n (to %s:%d, free heap = %d B)\n",
packetSize,
Udp.remoteIP().toString().c_str(), Udp.remotePort(),
Udp.destinationIP().toString().c_str(), Udp.localPort(),
ESP.getFreeHeap());
// read the packet into packetBufffer
Udp.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE);
int n = Udp.read(packetBuffer, UDP_TX_PACKET_MAX_SIZE);
packetBuffer[n] = 0;
Serial.println("Contents:");
Serial.println(packetBuffer);
@ -72,7 +66,7 @@ void loop() {
Udp.write(ReplyBuffer);
Udp.endPacket();
}
delay(10);
}
/*