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

Diff: server.cpp

Revision:
7:1bed29e1b0a4
Parent:
6:0c477f5b79ff
Child:
11:642eaabf1c2b
--- a/server.cpp	Wed Oct 21 08:51:38 2015 +0000
+++ b/server.cpp	Wed Oct 21 10:23:21 2015 +0000
@@ -26,38 +26,54 @@
     printf("\r\nWaiting for UDP packet...\r\n");
     int size = server.receiveFrom(client, buffer, sizeof(buffer));
     buffer[size] = '\0';
-    
-    char uriBuffer[URI_BUFFER_SIZE];
-    int uriLength;
-    uint8_t token[TOKEN_BUFFER_SIZE];
-    uint8_t tokenLength;
 
     CoapPDU *req = new CoapPDU((uint8_t*)buffer,256, size);
     if(req->validate()) {
+        
+        char uriBuffer[URI_BUFFER_SIZE];
+        int uriLength;
+        uint8_t token[TOKEN_BUFFER_SIZE];
+        uint8_t tokenLength;
+    
         req->printHuman();
 
         req->getURI(uriBuffer,URI_BUFFER_SIZE,&uriLength); 
         tokenLength = req->getTokenLength();
         memcpy(token, req->getTokenPointer(), tokenLength);
-    }
+    
+        int resourceIndex = findResource(uriBuffer, req->getCode());
     
-    
+        
+        CoapPDU *res = new CoapPDU();
+        res->setMessageID(req->getMessageID());
+        res->setToken(token,4);
+        
+        switch(req->getType()){
+            case Response::COAP_NON_CONFIRMABLE: 
+                res->setType(Response::COAP_NON_CONFIRMABLE);
+                break;
+            case Response::COAP_CONFIRMABLE:
+                res->setType(Response::COAP_ACKNOWLEDGEMENT);
+        }
+        
+        res->setCode(Response::COAP_NOT_FOUND);
+        
+        if(resourceIndex != -1){
+            res->setCode(Response::COAP_NOT_IMPLEMENTED);
+            resources[resourceIndex].function((Request*)req, (Response*)res);
+        }
+        
+        server.sendTo(client, (char*) res->getPDUPointer(),res->getPDULength());
+        
+        delete res;
+        delete req;
+    }
+}
+
+int Server::findResource(char* uri, CoapPDU::Code code)
+{
     for(int i = 0; i < resources.size(); i++){
-        if(strcmp(uriBuffer, resources[i].uri) == 0){
-               
-            CoapPDU *res = new CoapPDU();
-            res->setType(Response::COAP_ACKNOWLEDGEMENT);
-            res->setCode(Response::COAP_CONTENT);
-            res->setMessageID(req->getMessageID());
-            res->setToken(token,4);
-            
-            resources[i].function((Request*)req, (Response*)res);
-                    
-            server.sendTo(client, (char*) res->getPDUPointer(),res->getPDULength());
-            delete res;
-            
-        }
+        if(strcmp(uri, resources[i].uri) == 0) return i;
     }
-    
-    delete req;
+    return -1;
 }
\ No newline at end of file