Yes We Can / yeswecancoap

Coap Client and Server

Dependencies:   DebugLib EthernetInterface cantcoap mbed-rtos

Dependents:   COAP coap

Fork of yeswecancoap by Sille Van Landschoot

YesWeCanCoap

Is a small coap client and server library for mbed based on the cantcoap library.

Import librarycantcoap

This is CoAP library with a focus on simplicity. It offers minimal CoAP PDU construction and decoding to and from byte buffers.

Last commit 30 Jan 2014 by Ashley Mills

yeswecancoap server enables easy implementation of coap resources, each with a dedicated function. When the function is registered by the server, it will do the rest.

Coap server example

Repository: YesWeCanCoap-example

Coap client example

under construction

server.cpp@1:ab04e3d36ade, 2015-10-20 (annotated)

Committer:
sillevl
Date:
Tue Oct 20 18:57:05 2015 +0000
Revision:
1:ab04e3d36ade
Child:
2:a03dd7e58d8f
Child:
3:e03960f91763
first working coap server

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sillevl 1:ab04e3d36ade 1 #include "server.h"
sillevl 1:ab04e3d36ade 2
sillevl 1:ab04e3d36ade 3
sillevl 1:ab04e3d36ade 4 Server::Server()
sillevl 1:ab04e3d36ade 5 {
sillevl 1:ab04e3d36ade 6 debug_init();
sillevl 1:ab04e3d36ade 7 debug_set_newline("\r\n");
sillevl 1:ab04e3d36ade 8
sillevl 1:ab04e3d36ade 9 eth.init(); //Use DHCP
sillevl 1:ab04e3d36ade 10 eth.connect();
sillevl 1:ab04e3d36ade 11 printf("\r\nServer IP Address is %s\r\n", eth.getIPAddress());
sillevl 1:ab04e3d36ade 12
sillevl 1:ab04e3d36ade 13 server.bind(5683);
sillevl 1:ab04e3d36ade 14 }
sillevl 1:ab04e3d36ade 15
sillevl 1:ab04e3d36ade 16 void Server::add(char* uri, void (*fnc)(Request), Method method)
sillevl 1:ab04e3d36ade 17 {
sillevl 1:ab04e3d36ade 18 this->fnc = fnc;
sillevl 1:ab04e3d36ade 19 }
sillevl 1:ab04e3d36ade 20
sillevl 1:ab04e3d36ade 21 void Server::waitForRequest()
sillevl 1:ab04e3d36ade 22 {
sillevl 1:ab04e3d36ade 23 char buffer[256];
sillevl 1:ab04e3d36ade 24 printf("\r\nWaiting for UDP packet...\r\n");
sillevl 1:ab04e3d36ade 25 int size = server.receiveFrom(client, buffer, sizeof(buffer));
sillevl 1:ab04e3d36ade 26 buffer[size] = '\0';
sillevl 1:ab04e3d36ade 27
sillevl 1:ab04e3d36ade 28 char uriBuffer[32];
sillevl 1:ab04e3d36ade 29 int recvURILen;
sillevl 1:ab04e3d36ade 30 int msgId;
sillevl 1:ab04e3d36ade 31 uint8_t token[20];
sillevl 1:ab04e3d36ade 32 int tokenLength;
sillevl 1:ab04e3d36ade 33
sillevl 1:ab04e3d36ade 34 CoapPDU *recvPDU = new CoapPDU((uint8_t*)buffer,256, size);
sillevl 1:ab04e3d36ade 35 if(recvPDU->validate()) {
sillevl 1:ab04e3d36ade 36 recvPDU->printHuman();
sillevl 1:ab04e3d36ade 37
sillevl 1:ab04e3d36ade 38 recvPDU->getURI(uriBuffer,32,&recvURILen);
sillevl 1:ab04e3d36ade 39 msgId = recvPDU->getMessageID();
sillevl 1:ab04e3d36ade 40 tokenLength = recvPDU->getTokenLength();
sillevl 1:ab04e3d36ade 41 memcpy(token, recvPDU->getTokenPointer(), tokenLength);
sillevl 1:ab04e3d36ade 42 }
sillevl 1:ab04e3d36ade 43 delete recvPDU;
sillevl 1:ab04e3d36ade 44
sillevl 1:ab04e3d36ade 45 if(strcmp(uriBuffer, "/hello") == 0){
sillevl 1:ab04e3d36ade 46 CoapPDU *pdu = new CoapPDU();
sillevl 1:ab04e3d36ade 47 pdu->setType(CoapPDU::COAP_ACKNOWLEDGEMENT);
sillevl 1:ab04e3d36ade 48 pdu->setCode(CoapPDU::COAP_CONTENT);
sillevl 1:ab04e3d36ade 49 pdu->setMessageID(msgId);
sillevl 1:ab04e3d36ade 50 pdu->setToken(token,4);
sillevl 1:ab04e3d36ade 51
sillevl 1:ab04e3d36ade 52 uint8_t txt[] = "Hello world";
sillevl 1:ab04e3d36ade 53 pdu->setPayload(txt, 11);
sillevl 1:ab04e3d36ade 54
sillevl 1:ab04e3d36ade 55 server.sendTo(client, (char*) pdu->getPDUPointer(),pdu->getPDULength());
sillevl 1:ab04e3d36ade 56 delete pdu;
sillevl 1:ab04e3d36ade 57 } else {
sillevl 1:ab04e3d36ade 58
sillevl 1:ab04e3d36ade 59 CoapPDU *pdu = new CoapPDU();
sillevl 1:ab04e3d36ade 60 pdu->setType(CoapPDU::COAP_ACKNOWLEDGEMENT);
sillevl 1:ab04e3d36ade 61 pdu->setCode(CoapPDU::COAP_NOT_FOUND);
sillevl 1:ab04e3d36ade 62 pdu->setMessageID(msgId);
sillevl 1:ab04e3d36ade 63 pdu->setToken(token,4);
sillevl 1:ab04e3d36ade 64
sillevl 1:ab04e3d36ade 65 server.sendTo(client, (char*) pdu->getPDUPointer(),pdu->getPDULength());
sillevl 1:ab04e3d36ade 66 delete pdu;
sillevl 1:ab04e3d36ade 67 }
sillevl 1:ab04e3d36ade 68 }