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cantcoap/cantcoap.cpp@68:e88f3fd2e9cf, 2017-01-23 (annotated)

Committer:: pannaanna
Date:: Mon Jan 23 14:18:23 2017 +0100
Revision:: 68:e88f3fd2e9cf
Parent:: 31:413ba83b8c0b

port changed

Who changed what in which revision?

User	Revision	Line number	New contents of line
Bartosz Stebel	31:413ba83b8c0b	1	/*
Bartosz Stebel	31:413ba83b8c0b	2	Copyright (c) 2013, Ashley Mills.
Bartosz Stebel	31:413ba83b8c0b	3	All rights reserved.
Bartosz Stebel	31:413ba83b8c0b	4
Bartosz Stebel	31:413ba83b8c0b	5	Redistribution and use in source and binary forms, with or without
Bartosz Stebel	31:413ba83b8c0b	6	modification, are permitted provided that the following conditions are met:
Bartosz Stebel	31:413ba83b8c0b	7
Bartosz Stebel	31:413ba83b8c0b	8	1. Redistributions of source code must retain the above copyright notice, this
Bartosz Stebel	31:413ba83b8c0b	9	list of conditions and the following disclaimer.
Bartosz Stebel	31:413ba83b8c0b	10	2. Redistributions in binary form must reproduce the above copyright notice,
Bartosz Stebel	31:413ba83b8c0b	11	this list of conditions and the following disclaimer in the documentation
Bartosz Stebel	31:413ba83b8c0b	12	and/or other materials provided with the distribution.
Bartosz Stebel	31:413ba83b8c0b	13
Bartosz Stebel	31:413ba83b8c0b	14	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
Bartosz Stebel	31:413ba83b8c0b	15	ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
Bartosz Stebel	31:413ba83b8c0b	16	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Bartosz Stebel	31:413ba83b8c0b	17	DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
Bartosz Stebel	31:413ba83b8c0b	18	ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
Bartosz Stebel	31:413ba83b8c0b	19	(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
Bartosz Stebel	31:413ba83b8c0b	20	LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
Bartosz Stebel	31:413ba83b8c0b	21	ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Bartosz Stebel	31:413ba83b8c0b	22	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Bartosz Stebel	31:413ba83b8c0b	23	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Bartosz Stebel	31:413ba83b8c0b	24	*/
Bartosz Stebel	31:413ba83b8c0b	25
Bartosz Stebel	31:413ba83b8c0b	26	// version, 2 bits
Bartosz Stebel	31:413ba83b8c0b	27	// type, 2 bits
Bartosz Stebel	31:413ba83b8c0b	28	// 00 Confirmable
Bartosz Stebel	31:413ba83b8c0b	29	// 01 Non-confirmable
Bartosz Stebel	31:413ba83b8c0b	30	// 10 Acknowledgement
Bartosz Stebel	31:413ba83b8c0b	31	// 11 Reset
Bartosz Stebel	31:413ba83b8c0b	32
Bartosz Stebel	31:413ba83b8c0b	33	// token length, 4 bits
Bartosz Stebel	31:413ba83b8c0b	34	// length of token in bytes (only 0 to 8 bytes allowed)
Bartosz Stebel	31:413ba83b8c0b	35	#include <stdio.h>
Bartosz Stebel	31:413ba83b8c0b	36	#include <stdlib.h>
Bartosz Stebel	31:413ba83b8c0b	37	#include <stdint.h>
Bartosz Stebel	31:413ba83b8c0b	38	#include <string.h>
Bartosz Stebel	31:413ba83b8c0b	39	#include <inet.h>
Bartosz Stebel	31:413ba83b8c0b	40	#include "cantcoap.h"
Bartosz Stebel	31:413ba83b8c0b	41
Bartosz Stebel	31:413ba83b8c0b	42	// for debugging output you need https://mbed.org/users/donatien/code/DebugLib/
Bartosz Stebel	31:413ba83b8c0b	43	#define __DEBUG__ 3 // INFO
Bartosz Stebel	31:413ba83b8c0b	44	#ifndef __MODULE__
Bartosz Stebel	31:413ba83b8c0b	45	#define __MODULE__ "cantcoap.cpp"
Bartosz Stebel	31:413ba83b8c0b	46	#endif
Bartosz Stebel	31:413ba83b8c0b	47	//#include "dbg.h"
Bartosz Stebel	31:413ba83b8c0b	48	// some extra debug stuff
Bartosz Stebel	31:413ba83b8c0b	49	#if __DEBUG__ > 0
Bartosz Stebel	31:413ba83b8c0b	50	#define INFOX(...) do { fprintf(stderr,__VA_ARGS__); } while(0)
Bartosz Stebel	31:413ba83b8c0b	51	#define INFOLX(...) do { fprintf(stderr,"[INFO] %s:%d ",__MODULE__,__LINE__); fprintf(stderr,__VA_ARGS__); } while(0)
Bartosz Stebel	31:413ba83b8c0b	52	#define DBGLX(...) do { fprintf(stderr,"[DBG] %s:%d ",__MODULE__,__LINE__); fprintf(stderr,__VA_ARGS__); } while(0)
Bartosz Stebel	31:413ba83b8c0b	53	#define DBG_PDU() do { printBin(); } while(0)
Bartosz Stebel	31:413ba83b8c0b	54	#else
Bartosz Stebel	31:413ba83b8c0b	55	#define INFOX(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	56	#define INFOLX(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	57	#define DBGLX(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	58	#define DBG_PDU() do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	59	#endif
Bartosz Stebel	31:413ba83b8c0b	60	#define INFO(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	61	#define DBGX(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	62	#define DBG(...) do{} while(0)
Bartosz Stebel	31:413ba83b8c0b	63
Bartosz Stebel	31:413ba83b8c0b	64
Bartosz Stebel	31:413ba83b8c0b	65	/// Memory-managed constructor. Buffer for PDU is dynamically sized and allocated by the object.
Bartosz Stebel	31:413ba83b8c0b	66	/**
Bartosz Stebel	31:413ba83b8c0b	67	* When using this constructor, the CoapPDU class will allocate space for the PDU.
Bartosz Stebel	31:413ba83b8c0b	68	* Contrast this with the parameterized constructors, which allow the use of an external buffer.
Bartosz Stebel	31:413ba83b8c0b	69	*
Bartosz Stebel	31:413ba83b8c0b	70	* Note, the PDU container and space can be reused by issuing a CoapPDU::reset(). If the new PDU exceeds the
Bartosz Stebel	31:413ba83b8c0b	71	* space of the previously allocated memory, then further memory will be dynamically allocated.
Bartosz Stebel	31:413ba83b8c0b	72	*
Bartosz Stebel	31:413ba83b8c0b	73	* Deleting the object will free the Object container and all dynamically allocated memory.
Bartosz Stebel	31:413ba83b8c0b	74	*
Bartosz Stebel	31:413ba83b8c0b	75	* \note It would have been nice to use something like UDP_CORK or MSG_MORE, to allow separate buffers
Bartosz Stebel	31:413ba83b8c0b	76	* for token, options, and payload but these FLAGS aren't implemented for UDP in LwIP so stuck with one buffer for now.
Bartosz Stebel	31:413ba83b8c0b	77	*
Bartosz Stebel	31:413ba83b8c0b	78	* CoAP version defaults to 1.
Bartosz Stebel	31:413ba83b8c0b	79	*
Bartosz Stebel	31:413ba83b8c0b	80	* \sa CoapPDU::CoapPDU(uint8_t pdu, int pduLength), CoapPDU::CoapPDU::(uint8_t buffer, int bufferLength, int pduLength),
Bartosz Stebel	31:413ba83b8c0b	81	* CoapPDU:CoapPDU()~
Bartosz Stebel	31:413ba83b8c0b	82	*
Bartosz Stebel	31:413ba83b8c0b	83	*/
Bartosz Stebel	31:413ba83b8c0b	84	CoapPDU::CoapPDU() {
Bartosz Stebel	31:413ba83b8c0b	85	// pdu
Bartosz Stebel	31:413ba83b8c0b	86	_pdu = (uint8_t*)calloc(4,sizeof(uint8_t));
Bartosz Stebel	31:413ba83b8c0b	87	_pduLength = 4;
Bartosz Stebel	31:413ba83b8c0b	88	_bufferLength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	89
Bartosz Stebel	31:413ba83b8c0b	90	//options
Bartosz Stebel	31:413ba83b8c0b	91	_numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	92	_maxAddedOptionNumber = 0;
Bartosz Stebel	31:413ba83b8c0b	93
Bartosz Stebel	31:413ba83b8c0b	94	// payload
Bartosz Stebel	31:413ba83b8c0b	95	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	96	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	97
Bartosz Stebel	31:413ba83b8c0b	98	_constructedFromBuffer = 0;
Bartosz Stebel	31:413ba83b8c0b	99
Bartosz Stebel	31:413ba83b8c0b	100	setVersion(1);
Bartosz Stebel	31:413ba83b8c0b	101	}
Bartosz Stebel	31:413ba83b8c0b	102
Bartosz Stebel	31:413ba83b8c0b	103	/// Construct a PDU using an external buffer. No copy of the buffer is made.
Bartosz Stebel	31:413ba83b8c0b	104	/**
Bartosz Stebel	31:413ba83b8c0b	105	* This constructor is normally used where a PDU has been received over the network, and it's length is known.
Bartosz Stebel	31:413ba83b8c0b	106	* In this case the CoapPDU object is probably going to be used as a temporary container to access member values.
Bartosz Stebel	31:413ba83b8c0b	107	*
Bartosz Stebel	31:413ba83b8c0b	108	* It is assumed that \b pduLength is the length of the actual CoAP PDU, and consequently the buffer will also be this size,
Bartosz Stebel	31:413ba83b8c0b	109	* contrast this with CoapPDU::CoapPDU(uint8_t *buffer, int bufferLength, int pduLength) which allows the buffer to
Bartosz Stebel	31:413ba83b8c0b	110	* be larger than the PDU.
Bartosz Stebel	31:413ba83b8c0b	111	*
Bartosz Stebel	31:413ba83b8c0b	112	* A PDU constructed in this manner must be validated with CoapPDU::validate() before the member variables will be accessible.
Bartosz Stebel	31:413ba83b8c0b	113	*
Bartosz Stebel	31:413ba83b8c0b	114	* \warning The validation call parses the PDU structure to set some internal parameters. If you do
Bartosz Stebel	31:413ba83b8c0b	115	* not validate the PDU, then the behaviour of member access functions will be undefined.
Bartosz Stebel	31:413ba83b8c0b	116	*
Bartosz Stebel	31:413ba83b8c0b	117	* The buffer can be reused by issuing a CoapPDU::reset() but the class will not change the size of the buffer. If the
Bartosz Stebel	31:413ba83b8c0b	118	* newly constructed PDU exceeds the size of the buffer, the function called (for example CoapPDU::addOption) will fail.
Bartosz Stebel	31:413ba83b8c0b	119	*
Bartosz Stebel	31:413ba83b8c0b	120	* Deleting this object will only delete the Object container and will not delete the PDU buffer.
Bartosz Stebel	31:413ba83b8c0b	121	*
Bartosz Stebel	31:413ba83b8c0b	122	* @param pdu A pointer to an array of bytes which comprise the CoAP PDU
Bartosz Stebel	31:413ba83b8c0b	123	* @param pduLength The length of the CoAP PDU pointed to by \b pdu
Bartosz Stebel	31:413ba83b8c0b	124
Bartosz Stebel	31:413ba83b8c0b	125	* \sa CoapPDU::CoapPDU(), CoapPDU::CoapPDU(uint8_t *buffer, int bufferLength, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	126	*/
Bartosz Stebel	31:413ba83b8c0b	127	CoapPDU::CoapPDU(uint8_t *pdu, int pduLength) {
Bartosz Stebel	31:413ba83b8c0b	128	int bufferLength = pduLength;
Bartosz Stebel	31:413ba83b8c0b	129	// sanity
Bartosz Stebel	31:413ba83b8c0b	130	if(pduLength<4&&pduLength!=0) {
Bartosz Stebel	31:413ba83b8c0b	131	DBG("PDU cannot have a length less than 4");
Bartosz Stebel	31:413ba83b8c0b	132	}
Bartosz Stebel	31:413ba83b8c0b	133
Bartosz Stebel	31:413ba83b8c0b	134	// pdu
Bartosz Stebel	31:413ba83b8c0b	135	_pdu = pdu;
Bartosz Stebel	31:413ba83b8c0b	136	_bufferLength = bufferLength;
Bartosz Stebel	31:413ba83b8c0b	137	if(pduLength==0) {
Bartosz Stebel	31:413ba83b8c0b	138	// this is actually a fresh pdu, header always exists
Bartosz Stebel	31:413ba83b8c0b	139	_pduLength = 4;
Bartosz Stebel	31:413ba83b8c0b	140	// make sure header is zeroed
Bartosz Stebel	31:413ba83b8c0b	141	_pdu[0] = 0x00; _pdu[1] = 0x00; _pdu[2] = 0x00; _pdu[3] = 0x00;
Bartosz Stebel	31:413ba83b8c0b	142	setVersion(1);
Bartosz Stebel	31:413ba83b8c0b	143	} else {
Bartosz Stebel	31:413ba83b8c0b	144	_pduLength = pduLength;
Bartosz Stebel	31:413ba83b8c0b	145	}
Bartosz Stebel	31:413ba83b8c0b	146
Bartosz Stebel	31:413ba83b8c0b	147	_constructedFromBuffer = 1;
Bartosz Stebel	31:413ba83b8c0b	148
Bartosz Stebel	31:413ba83b8c0b	149	// options
Bartosz Stebel	31:413ba83b8c0b	150	_numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	151	_maxAddedOptionNumber = 0;
Bartosz Stebel	31:413ba83b8c0b	152
Bartosz Stebel	31:413ba83b8c0b	153	// payload
Bartosz Stebel	31:413ba83b8c0b	154	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	155	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	156	}
Bartosz Stebel	31:413ba83b8c0b	157
Bartosz Stebel	31:413ba83b8c0b	158	/// Construct object from external buffer that may be larger than actual PDU.
Bartosz Stebel	31:413ba83b8c0b	159	/**
Bartosz Stebel	31:413ba83b8c0b	160	* This differs from CoapPDU::CoapPDU(uint8_t *pdu, int pduLength) in that the buffer may be larger
Bartosz Stebel	31:413ba83b8c0b	161	* than the actual CoAP PDU contained int the buffer. This is typically used when a large buffer is reused
Bartosz Stebel	31:413ba83b8c0b	162	* multiple times. Note that \b pduLength can be 0.
Bartosz Stebel	31:413ba83b8c0b	163	*
Bartosz Stebel	31:413ba83b8c0b	164	* If an actual CoAP PDU is passed in the buffer, \b pduLength should match its length. CoapPDU::validate() must
Bartosz Stebel	31:413ba83b8c0b	165	* be called to initiate the object before member functions can be used.
Bartosz Stebel	31:413ba83b8c0b	166	*
Bartosz Stebel	31:413ba83b8c0b	167	* A PDU constructed in this manner must be validated with CoapPDU::validate() before the member variables will be accessible.
Bartosz Stebel	31:413ba83b8c0b	168	*
Bartosz Stebel	31:413ba83b8c0b	169	* \warning The validation call parses the PDU structure to set some internal parameters. If you do
Bartosz Stebel	31:413ba83b8c0b	170	* not validate the PDU, then the behaviour of member access functions will be undefined.
Bartosz Stebel	31:413ba83b8c0b	171	*
Bartosz Stebel	31:413ba83b8c0b	172	* The buffer can be reused by issuing a CoapPDU::reset() but the class will not change the size of the buffer. If the
Bartosz Stebel	31:413ba83b8c0b	173	* newly constructed PDU exceeds the size of the buffer, the function called (for example CoapPDU::addOption) will fail.
Bartosz Stebel	31:413ba83b8c0b	174	*
Bartosz Stebel	31:413ba83b8c0b	175	* Deleting this object will only delete the Object container and will not delete the PDU buffer.
Bartosz Stebel	31:413ba83b8c0b	176	*
Bartosz Stebel	31:413ba83b8c0b	177	* \param buffer A buffer which either contains a CoAP PDU or is intended to be used to construct one.
Bartosz Stebel	31:413ba83b8c0b	178	* \param bufferLength The length of the buffer
Bartosz Stebel	31:413ba83b8c0b	179	* \param pduLength If the buffer contains a CoAP PDU, this specifies the length of the PDU within the buffer.
Bartosz Stebel	31:413ba83b8c0b	180	*
Bartosz Stebel	31:413ba83b8c0b	181	* \sa CoapPDU::CoapPDU(), CoapPDU::CoapPDU(uint8_t *pdu, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	182	*/
Bartosz Stebel	31:413ba83b8c0b	183	CoapPDU::CoapPDU(uint8_t *buffer, int bufferLength, int pduLength) {
Bartosz Stebel	31:413ba83b8c0b	184	// sanity
Bartosz Stebel	31:413ba83b8c0b	185	if(pduLength<4&&pduLength!=0) {
Bartosz Stebel	31:413ba83b8c0b	186	DBG("PDU cannot have a length less than 4");
Bartosz Stebel	31:413ba83b8c0b	187	}
Bartosz Stebel	31:413ba83b8c0b	188
Bartosz Stebel	31:413ba83b8c0b	189	// pdu
Bartosz Stebel	31:413ba83b8c0b	190	_pdu = buffer;
Bartosz Stebel	31:413ba83b8c0b	191	_bufferLength = bufferLength;
Bartosz Stebel	31:413ba83b8c0b	192	if(pduLength==0) {
Bartosz Stebel	31:413ba83b8c0b	193	// this is actually a fresh pdu, header always exists
Bartosz Stebel	31:413ba83b8c0b	194	_pduLength = 4;
Bartosz Stebel	31:413ba83b8c0b	195	// make sure header is zeroed
Bartosz Stebel	31:413ba83b8c0b	196	_pdu[0] = 0x00; _pdu[1] = 0x00; _pdu[2] = 0x00; _pdu[3] = 0x00;
Bartosz Stebel	31:413ba83b8c0b	197	setVersion(1);
Bartosz Stebel	31:413ba83b8c0b	198	} else {
Bartosz Stebel	31:413ba83b8c0b	199	_pduLength = pduLength;
Bartosz Stebel	31:413ba83b8c0b	200	}
Bartosz Stebel	31:413ba83b8c0b	201
Bartosz Stebel	31:413ba83b8c0b	202	_constructedFromBuffer = 1;
Bartosz Stebel	31:413ba83b8c0b	203
Bartosz Stebel	31:413ba83b8c0b	204	// options
Bartosz Stebel	31:413ba83b8c0b	205	_numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	206	_maxAddedOptionNumber = 0;
Bartosz Stebel	31:413ba83b8c0b	207
Bartosz Stebel	31:413ba83b8c0b	208	// payload
Bartosz Stebel	31:413ba83b8c0b	209	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	210	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	211	}
Bartosz Stebel	31:413ba83b8c0b	212
Bartosz Stebel	31:413ba83b8c0b	213	/// Reset CoapPDU container so it can be reused to build a new PDU.
Bartosz Stebel	31:413ba83b8c0b	214	/**
Bartosz Stebel	31:413ba83b8c0b	215	* This resets the CoapPDU container, setting the pdu length, option count, etc back to zero. The
Bartosz Stebel	31:413ba83b8c0b	216	* PDU can then be populated as if it were newly constructed.
Bartosz Stebel	31:413ba83b8c0b	217	*
Bartosz Stebel	31:413ba83b8c0b	218	* Note that the space available will depend on how the CoapPDU was originally constructed:
Bartosz Stebel	31:413ba83b8c0b	219	* -# CoapPDU::CoapPDU()
Bartosz Stebel	31:413ba83b8c0b	220	*
Bartosz Stebel	31:413ba83b8c0b	221	* Available space initially be \b _pduLength. But further space will be allocated as needed on demand,
Bartosz Stebel	31:413ba83b8c0b	222	* limited only by the OS/environment.
Bartosz Stebel	31:413ba83b8c0b	223	*
Bartosz Stebel	31:413ba83b8c0b	224	* -# CoapPDU::CoapPDU(uint8_t *pdu, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	225	*
Bartosz Stebel	31:413ba83b8c0b	226	* Space is limited by the variable \b pduLength. The PDU cannot exceed \b pduLength bytes.
Bartosz Stebel	31:413ba83b8c0b	227	*
Bartosz Stebel	31:413ba83b8c0b	228	* -# CoapPDU::CoapPDU(uint8_t *buffer, int bufferLength, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	229	*
Bartosz Stebel	31:413ba83b8c0b	230	* Space is limited by the variable \b bufferLength. The PDU cannot exceed \b bufferLength bytes.
Bartosz Stebel	31:413ba83b8c0b	231	*
Bartosz Stebel	31:413ba83b8c0b	232	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	233	*/
Bartosz Stebel	31:413ba83b8c0b	234	int CoapPDU::reset() {
Bartosz Stebel	31:413ba83b8c0b	235	// pdu
Bartosz Stebel	31:413ba83b8c0b	236	memset(_pdu,0x00,_bufferLength);
Bartosz Stebel	31:413ba83b8c0b	237	// packet always has at least a header
Bartosz Stebel	31:413ba83b8c0b	238	_pduLength = 4;
Bartosz Stebel	31:413ba83b8c0b	239
Bartosz Stebel	31:413ba83b8c0b	240	// options
Bartosz Stebel	31:413ba83b8c0b	241	_numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	242	_maxAddedOptionNumber = 0;
Bartosz Stebel	31:413ba83b8c0b	243	// payload
Bartosz Stebel	31:413ba83b8c0b	244	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	245	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	246	return 0;
Bartosz Stebel	31:413ba83b8c0b	247	}
Bartosz Stebel	31:413ba83b8c0b	248
Bartosz Stebel	31:413ba83b8c0b	249	/// Validates a PDU constructed using an external buffer.
Bartosz Stebel	31:413ba83b8c0b	250	/**
Bartosz Stebel	31:413ba83b8c0b	251	* When a CoapPDU is constructed using an external buffer, the programmer must call this function to
Bartosz Stebel	31:413ba83b8c0b	252	* check that the received PDU is a valid CoAP PDU.
Bartosz Stebel	31:413ba83b8c0b	253	*
Bartosz Stebel	31:413ba83b8c0b	254	* \warning The validation call parses the PDU structure to set some internal parameters. If you do
Bartosz Stebel	31:413ba83b8c0b	255	* not validate the PDU, then the behaviour of member access functions will be undefined.
Bartosz Stebel	31:413ba83b8c0b	256	*
Bartosz Stebel	31:413ba83b8c0b	257	* \return 1 if the PDU validates correctly, 0 if not. XXX maybe add some error codes
Bartosz Stebel	31:413ba83b8c0b	258	*/
Bartosz Stebel	31:413ba83b8c0b	259	int CoapPDU::validate() {
Bartosz Stebel	31:413ba83b8c0b	260	if(_pduLength<4) {
Bartosz Stebel	31:413ba83b8c0b	261	DBG("PDU has to be a minimum of 4 bytes. This: %d bytes",_pduLength);
Bartosz Stebel	31:413ba83b8c0b	262	return 0;
Bartosz Stebel	31:413ba83b8c0b	263	}
Bartosz Stebel	31:413ba83b8c0b	264
Bartosz Stebel	31:413ba83b8c0b	265	// check header
Bartosz Stebel	31:413ba83b8c0b	266	// 0 1 2 3
Bartosz Stebel	31:413ba83b8c0b	267	// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
Bartosz Stebel	31:413ba83b8c0b	268	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bartosz Stebel	31:413ba83b8c0b	269	// \|Ver\| T \| TKL \| Code \| Message ID \|
Bartosz Stebel	31:413ba83b8c0b	270	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bartosz Stebel	31:413ba83b8c0b	271	// \| Token (if any, TKL bytes) ...
Bartosz Stebel	31:413ba83b8c0b	272	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bartosz Stebel	31:413ba83b8c0b	273	// \| Options (if any) ...
Bartosz Stebel	31:413ba83b8c0b	274	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bartosz Stebel	31:413ba83b8c0b	275	// \|1 1 1 1 1 1 1 1\| Payload (if any) ...
Bartosz Stebel	31:413ba83b8c0b	276	// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Bartosz Stebel	31:413ba83b8c0b	277
Bartosz Stebel	31:413ba83b8c0b	278	DBG("Version: %d",getVersion());
Bartosz Stebel	31:413ba83b8c0b	279	DBG("Type: %d",getType());
Bartosz Stebel	31:413ba83b8c0b	280
Bartosz Stebel	31:413ba83b8c0b	281	// token length must be between 0 and 8
Bartosz Stebel	31:413ba83b8c0b	282	int tokenLength = getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	283	if(tokenLength<0\|\|tokenLength>8) {
Bartosz Stebel	31:413ba83b8c0b	284	DBG("Invalid token length: %d",tokenLength);
Bartosz Stebel	31:413ba83b8c0b	285	return 0;
Bartosz Stebel	31:413ba83b8c0b	286	}
Bartosz Stebel	31:413ba83b8c0b	287	DBG("Token length: %d",tokenLength);
Bartosz Stebel	31:413ba83b8c0b	288	// check total length
Bartosz Stebel	31:413ba83b8c0b	289	if((COAP_HDR_SIZE+tokenLength)>_pduLength) {
Bartosz Stebel	31:413ba83b8c0b	290	DBG("Token length would make pdu longer than actual length.");
Bartosz Stebel	31:413ba83b8c0b	291	return 0;
Bartosz Stebel	31:413ba83b8c0b	292	}
Bartosz Stebel	31:413ba83b8c0b	293
Bartosz Stebel	31:413ba83b8c0b	294	// check that code is valid
Bartosz Stebel	31:413ba83b8c0b	295	CoapPDU::Code code = getCode();
Bartosz Stebel	31:413ba83b8c0b	296	if(code<COAP_EMPTY \|\|
Bartosz Stebel	31:413ba83b8c0b	297	(code>COAP_DELETE&&code<COAP_CREATED) \|\|
Bartosz Stebel	31:413ba83b8c0b	298	(code>COAP_CONTENT&&code<COAP_BAD_REQUEST) \|\|
Bartosz Stebel	31:413ba83b8c0b	299	(code>COAP_NOT_ACCEPTABLE&&code<COAP_PRECONDITION_FAILED) \|\|
Bartosz Stebel	31:413ba83b8c0b	300	(code==0x8E) \|\|
Bartosz Stebel	31:413ba83b8c0b	301	(code>COAP_UNSUPPORTED_CONTENT_FORMAT&&code<COAP_INTERNAL_SERVER_ERROR) \|\|
Bartosz Stebel	31:413ba83b8c0b	302	(code>COAP_PROXYING_NOT_SUPPORTED) ) {
Bartosz Stebel	31:413ba83b8c0b	303	DBG("Invalid CoAP code: %d",code);
Bartosz Stebel	31:413ba83b8c0b	304	return 0;
Bartosz Stebel	31:413ba83b8c0b	305	}
Bartosz Stebel	31:413ba83b8c0b	306	DBG("CoAP code: %d",code);
Bartosz Stebel	31:413ba83b8c0b	307
Bartosz Stebel	31:413ba83b8c0b	308	// token can be anything so nothing to check
Bartosz Stebel	31:413ba83b8c0b	309
Bartosz Stebel	31:413ba83b8c0b	310	// check that options all make sense
Bartosz Stebel	31:413ba83b8c0b	311	uint16_t optionDelta =0, optionNumber = 0, optionValueLength = 0;
Bartosz Stebel	31:413ba83b8c0b	312	int totalLength = 0;
Bartosz Stebel	31:413ba83b8c0b	313
Bartosz Stebel	31:413ba83b8c0b	314	// first option occurs after token
Bartosz Stebel	31:413ba83b8c0b	315	int optionPos = COAP_HDR_SIZE + getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	316
Bartosz Stebel	31:413ba83b8c0b	317	// may be 0 options
Bartosz Stebel	31:413ba83b8c0b	318	if(optionPos==_pduLength) {
Bartosz Stebel	31:413ba83b8c0b	319	DBG("No options. No payload.");
Bartosz Stebel	31:413ba83b8c0b	320	_numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	321	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	322	return 1;
Bartosz Stebel	31:413ba83b8c0b	323	}
Bartosz Stebel	31:413ba83b8c0b	324
Bartosz Stebel	31:413ba83b8c0b	325	int bytesRemaining = _pduLength-optionPos;
Bartosz Stebel	31:413ba83b8c0b	326	int numOptions = 0;
Bartosz Stebel	31:413ba83b8c0b	327	uint8_t upperNibble = 0x00, lowerNibble = 0x00;
Bartosz Stebel	31:413ba83b8c0b	328
Bartosz Stebel	31:413ba83b8c0b	329	// walk over options and record information
Bartosz Stebel	31:413ba83b8c0b	330	while(1) {
Bartosz Stebel	31:413ba83b8c0b	331	// check for payload marker
Bartosz Stebel	31:413ba83b8c0b	332	if(bytesRemaining>0) {
Bartosz Stebel	31:413ba83b8c0b	333	uint8_t optionHeader = _pdu[optionPos];
Bartosz Stebel	31:413ba83b8c0b	334	if(optionHeader==0xFF) {
Bartosz Stebel	31:413ba83b8c0b	335	// payload
Bartosz Stebel	31:413ba83b8c0b	336	if(bytesRemaining>1) {
Bartosz Stebel	31:413ba83b8c0b	337	_payloadPointer = &_pdu[optionPos+1];
Bartosz Stebel	31:413ba83b8c0b	338	_payloadLength = (bytesRemaining-1);
Bartosz Stebel	31:413ba83b8c0b	339	_numOptions = numOptions;
Bartosz Stebel	31:413ba83b8c0b	340	DBG("Payload found, length: %d",_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	341	return 1;
Bartosz Stebel	31:413ba83b8c0b	342	}
Bartosz Stebel	31:413ba83b8c0b	343	// payload marker but no payload
Bartosz Stebel	31:413ba83b8c0b	344	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	345	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	346	DBG("Payload marker but no payload.");
Bartosz Stebel	31:413ba83b8c0b	347	return 0;
Bartosz Stebel	31:413ba83b8c0b	348	}
Bartosz Stebel	31:413ba83b8c0b	349
Bartosz Stebel	31:413ba83b8c0b	350	// check that option delta and option length are valid values
Bartosz Stebel	31:413ba83b8c0b	351	upperNibble = (optionHeader & 0xF0) >> 4;
Bartosz Stebel	31:413ba83b8c0b	352	lowerNibble = (optionHeader & 0x0F);
Bartosz Stebel	31:413ba83b8c0b	353	if(upperNibble==0x0F\|\|lowerNibble==0x0F) {
Bartosz Stebel	31:413ba83b8c0b	354	DBG("Expected option header or payload marker, got: 0x%x%x",upperNibble,lowerNibble);
Bartosz Stebel	31:413ba83b8c0b	355	return 0;
Bartosz Stebel	31:413ba83b8c0b	356	}
Bartosz Stebel	31:413ba83b8c0b	357	DBG("Option header byte appears sane: 0x%x%x",upperNibble,lowerNibble);
Bartosz Stebel	31:413ba83b8c0b	358	} else {
Bartosz Stebel	31:413ba83b8c0b	359	DBG("No more data. No payload.");
Bartosz Stebel	31:413ba83b8c0b	360	_payloadPointer = NULL;
Bartosz Stebel	31:413ba83b8c0b	361	_payloadLength = 0;
Bartosz Stebel	31:413ba83b8c0b	362	_numOptions = numOptions;
Bartosz Stebel	31:413ba83b8c0b	363	return 1;
Bartosz Stebel	31:413ba83b8c0b	364	}
Bartosz Stebel	31:413ba83b8c0b	365
Bartosz Stebel	31:413ba83b8c0b	366	// skip over option header byte
Bartosz Stebel	31:413ba83b8c0b	367	bytesRemaining--;
Bartosz Stebel	31:413ba83b8c0b	368
Bartosz Stebel	31:413ba83b8c0b	369	// check that there is enough space for the extended delta and length bytes (if any)
Bartosz Stebel	31:413ba83b8c0b	370	int headerBytesNeeded = computeExtraBytes(upperNibble);
Bartosz Stebel	31:413ba83b8c0b	371	DBG("%d extra bytes needed for extended delta",headerBytesNeeded);
Bartosz Stebel	31:413ba83b8c0b	372	if(headerBytesNeeded>bytesRemaining) {
Bartosz Stebel	31:413ba83b8c0b	373	DBG("Not enough space for extended option delta, needed %d, have %d.",headerBytesNeeded,bytesRemaining);
Bartosz Stebel	31:413ba83b8c0b	374	return 0;
Bartosz Stebel	31:413ba83b8c0b	375	}
Bartosz Stebel	31:413ba83b8c0b	376	headerBytesNeeded += computeExtraBytes(lowerNibble);
Bartosz Stebel	31:413ba83b8c0b	377	if(headerBytesNeeded>bytesRemaining) {
Bartosz Stebel	31:413ba83b8c0b	378	DBG("Not enough space for extended option length, needed %d, have %d.",
Bartosz Stebel	31:413ba83b8c0b	379	(headerBytesNeeded-computeExtraBytes(upperNibble)),bytesRemaining);
Bartosz Stebel	31:413ba83b8c0b	380	return 0;
Bartosz Stebel	31:413ba83b8c0b	381	}
Bartosz Stebel	31:413ba83b8c0b	382	DBG("Enough space for extended delta and length: %d, continuing.",headerBytesNeeded);
Bartosz Stebel	31:413ba83b8c0b	383
Bartosz Stebel	31:413ba83b8c0b	384	// extract option details
Bartosz Stebel	31:413ba83b8c0b	385	optionDelta = getOptionDelta(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	386	optionNumber += optionDelta;
Bartosz Stebel	31:413ba83b8c0b	387	optionValueLength = getOptionValueLength(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	388	DBG("Got option: %d with length %d",optionNumber,optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	389	// compute total length
Bartosz Stebel	31:413ba83b8c0b	390	totalLength = 1; // mandatory header
Bartosz Stebel	31:413ba83b8c0b	391	totalLength += computeExtraBytes(optionDelta);
Bartosz Stebel	31:413ba83b8c0b	392	totalLength += computeExtraBytes(optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	393	totalLength += optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	394	// check there is enough space
Bartosz Stebel	31:413ba83b8c0b	395	if(optionPos+totalLength>_pduLength) {
Bartosz Stebel	31:413ba83b8c0b	396	DBG("Not enough space for option payload, needed %d, have %d.",(totalLength-headerBytesNeeded-1),_pduLength-optionPos);
Bartosz Stebel	31:413ba83b8c0b	397	return 0;
Bartosz Stebel	31:413ba83b8c0b	398	}
Bartosz Stebel	31:413ba83b8c0b	399	DBG("Enough space for option payload: %d %d",optionValueLength,(totalLength-headerBytesNeeded-1));
Bartosz Stebel	31:413ba83b8c0b	400
Bartosz Stebel	31:413ba83b8c0b	401	// recompute bytesRemaining
Bartosz Stebel	31:413ba83b8c0b	402	bytesRemaining -= totalLength;
Bartosz Stebel	31:413ba83b8c0b	403	bytesRemaining++; // correct for previous --
Bartosz Stebel	31:413ba83b8c0b	404
Bartosz Stebel	31:413ba83b8c0b	405	// move to next option
Bartosz Stebel	31:413ba83b8c0b	406	optionPos += totalLength;
Bartosz Stebel	31:413ba83b8c0b	407
Bartosz Stebel	31:413ba83b8c0b	408	// inc number of options XXX
Bartosz Stebel	31:413ba83b8c0b	409	numOptions++;
Bartosz Stebel	31:413ba83b8c0b	410	}
Bartosz Stebel	31:413ba83b8c0b	411
Bartosz Stebel	31:413ba83b8c0b	412	return 1;
Bartosz Stebel	31:413ba83b8c0b	413	}
Bartosz Stebel	31:413ba83b8c0b	414
Bartosz Stebel	31:413ba83b8c0b	415	/// Destructor. Does not free buffer if constructor passed an external buffer.
Bartosz Stebel	31:413ba83b8c0b	416	/**
Bartosz Stebel	31:413ba83b8c0b	417	* The destructor acts differently, depending on how the object was initially constructed (from buffer or not):
Bartosz Stebel	31:413ba83b8c0b	418	*
Bartosz Stebel	31:413ba83b8c0b	419	* -# CoapPDU::CoapPDU()
Bartosz Stebel	31:413ba83b8c0b	420	*
Bartosz Stebel	31:413ba83b8c0b	421	* Complete object is destroyed.
Bartosz Stebel	31:413ba83b8c0b	422	*
Bartosz Stebel	31:413ba83b8c0b	423	* -# CoapPDU::CoapPDU(uint8_t *pdu, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	424	*
Bartosz Stebel	31:413ba83b8c0b	425	* Only object container is destroyed. \b pdu is left intact.
Bartosz Stebel	31:413ba83b8c0b	426	*
Bartosz Stebel	31:413ba83b8c0b	427	* -# CoapPDU::CoapPDU(uint8_t *buffer, int bufferLength, int pduLength)
Bartosz Stebel	31:413ba83b8c0b	428	*
Bartosz Stebel	31:413ba83b8c0b	429	* Only object container is destroyed. \b pdu is left intact.
Bartosz Stebel	31:413ba83b8c0b	430	*
Bartosz Stebel	31:413ba83b8c0b	431	*/
Bartosz Stebel	31:413ba83b8c0b	432	CoapPDU::~CoapPDU() {
Bartosz Stebel	31:413ba83b8c0b	433	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	434	free(_pdu);
Bartosz Stebel	31:413ba83b8c0b	435	}
Bartosz Stebel	31:413ba83b8c0b	436	}
Bartosz Stebel	31:413ba83b8c0b	437
Bartosz Stebel	31:413ba83b8c0b	438	/// Returns a pointer to the internal buffer.
Bartosz Stebel	31:413ba83b8c0b	439	uint8_t* CoapPDU::getPDUPointer() {
Bartosz Stebel	31:413ba83b8c0b	440	return _pdu;
Bartosz Stebel	31:413ba83b8c0b	441	}
Bartosz Stebel	31:413ba83b8c0b	442
Bartosz Stebel	31:413ba83b8c0b	443	/// Set the PDU length to the length specified.
Bartosz Stebel	31:413ba83b8c0b	444	/**
Bartosz Stebel	31:413ba83b8c0b	445	* This is used when re-using a PDU container before calling CoapPDU::validate() as it
Bartosz Stebel	31:413ba83b8c0b	446	* is not possible to deduce the length of a PDU since the payload has no length marker.
Bartosz Stebel	31:413ba83b8c0b	447	* \param len The length of the PDU
Bartosz Stebel	31:413ba83b8c0b	448	*/
Bartosz Stebel	31:413ba83b8c0b	449	void CoapPDU::setPDULength(int len) {
Bartosz Stebel	31:413ba83b8c0b	450	_pduLength = len;
Bartosz Stebel	31:413ba83b8c0b	451	}
Bartosz Stebel	31:413ba83b8c0b	452
Bartosz Stebel	31:413ba83b8c0b	453	/// Shorthand function for setting a resource URI.
Bartosz Stebel	31:413ba83b8c0b	454	/**
Bartosz Stebel	31:413ba83b8c0b	455	* Calls CoapPDU::setURI(uri,strlen(uri).
Bartosz Stebel	31:413ba83b8c0b	456	*/
Bartosz Stebel	31:413ba83b8c0b	457	int CoapPDU::setURI(char *uri) {
Bartosz Stebel	31:413ba83b8c0b	458	return setURI(uri,strlen(uri));
Bartosz Stebel	31:413ba83b8c0b	459	}
Bartosz Stebel	31:413ba83b8c0b	460
Bartosz Stebel	31:413ba83b8c0b	461	/// Shorthand function for setting a resource URI.
Bartosz Stebel	31:413ba83b8c0b	462	/**
Bartosz Stebel	31:413ba83b8c0b	463	* This will parse the supplied \b uri and construct enough URI_PATH CoAP options to encode it.
Bartosz Stebel	31:413ba83b8c0b	464	* The options are added to the PDU.
Bartosz Stebel	31:413ba83b8c0b	465	*
Bartosz Stebel	31:413ba83b8c0b	466	* At present queries are not handled. TODO Implement queries.
Bartosz Stebel	31:413ba83b8c0b	467	*
Bartosz Stebel	31:413ba83b8c0b	468	* \note This uses an internal buffer of 16 bytes to manipulate strings. The internal buffer will be
Bartosz Stebel	31:413ba83b8c0b	469	* expanded dynamically if necessary (path component longer than 16 bytes). The internal buffer will
Bartosz Stebel	31:413ba83b8c0b	470	* be freed before the function returns.
Bartosz Stebel	31:413ba83b8c0b	471	*
Bartosz Stebel	31:413ba83b8c0b	472	* \param uri The uri to parse.
Bartosz Stebel	31:413ba83b8c0b	473	* \param urilen The length of the uri to parse.
Bartosz Stebel	31:413ba83b8c0b	474	*
Bartosz Stebel	31:413ba83b8c0b	475	* \return 1 on success, 0 on failure.
Bartosz Stebel	31:413ba83b8c0b	476	*/
Bartosz Stebel	31:413ba83b8c0b	477	int CoapPDU::setURI(char *uri, int urilen) {
Bartosz Stebel	31:413ba83b8c0b	478	// only '/' and alphabetic chars allowed
Bartosz Stebel	31:413ba83b8c0b	479	// very simple splitting done
Bartosz Stebel	31:413ba83b8c0b	480
Bartosz Stebel	31:413ba83b8c0b	481	// sanitation
Bartosz Stebel	31:413ba83b8c0b	482	if(urilen<=0\|\|uri==NULL) {
Bartosz Stebel	31:413ba83b8c0b	483	DBG("Null or zero-length uri passed.");
Bartosz Stebel	31:413ba83b8c0b	484	return 1;
Bartosz Stebel	31:413ba83b8c0b	485	}
Bartosz Stebel	31:413ba83b8c0b	486
Bartosz Stebel	31:413ba83b8c0b	487	// single character URI path (including '/' case)
Bartosz Stebel	31:413ba83b8c0b	488	if(urilen==1) {
Bartosz Stebel	31:413ba83b8c0b	489	addOption(COAP_OPTION_URI_PATH,1,(uint8_t*)uri);
Bartosz Stebel	31:413ba83b8c0b	490	return 0;
Bartosz Stebel	31:413ba83b8c0b	491	}
Bartosz Stebel	31:413ba83b8c0b	492
Bartosz Stebel	31:413ba83b8c0b	493	// local vars
Bartosz Stebel	31:413ba83b8c0b	494	char startP=uri,endP=NULL;
Bartosz Stebel	31:413ba83b8c0b	495	int oLen = 0;
Bartosz Stebel	31:413ba83b8c0b	496	int bufSpace = 16;
Bartosz Stebel	31:413ba83b8c0b	497	char uriBuf = (char)malloc(bufSpace*sizeof(char));
Bartosz Stebel	31:413ba83b8c0b	498	if(uriBuf==NULL) {
Bartosz Stebel	31:413ba83b8c0b	499	DBG("Error allocating temporary memory.");
Bartosz Stebel	31:413ba83b8c0b	500	return 1;
Bartosz Stebel	31:413ba83b8c0b	501	}
Bartosz Stebel	31:413ba83b8c0b	502
Bartosz Stebel	31:413ba83b8c0b	503	while(1) {
Bartosz Stebel	31:413ba83b8c0b	504	// stop at end of string
Bartosz Stebel	31:413ba83b8c0b	505	if(startP==0x00\|\|(startP+1)==0x00) {
Bartosz Stebel	31:413ba83b8c0b	506	break;
Bartosz Stebel	31:413ba83b8c0b	507	}
Bartosz Stebel	31:413ba83b8c0b	508
Bartosz Stebel	31:413ba83b8c0b	509	// ignore leading slash
Bartosz Stebel	31:413ba83b8c0b	510	if(*startP=='/') {
Bartosz Stebel	31:413ba83b8c0b	511	DBG("Skipping leading slash");
Bartosz Stebel	31:413ba83b8c0b	512	startP++;
Bartosz Stebel	31:413ba83b8c0b	513	}
Bartosz Stebel	31:413ba83b8c0b	514
Bartosz Stebel	31:413ba83b8c0b	515	// find next split point
Bartosz Stebel	31:413ba83b8c0b	516	endP = strchr(startP,'/');
Bartosz Stebel	31:413ba83b8c0b	517
Bartosz Stebel	31:413ba83b8c0b	518	// might not be another slash
Bartosz Stebel	31:413ba83b8c0b	519	if(endP==NULL) {
Bartosz Stebel	31:413ba83b8c0b	520	DBG("Ending out of slash");
Bartosz Stebel	31:413ba83b8c0b	521	endP = uri+urilen;
Bartosz Stebel	31:413ba83b8c0b	522	}
Bartosz Stebel	31:413ba83b8c0b	523
Bartosz Stebel	31:413ba83b8c0b	524	// get length of segment
Bartosz Stebel	31:413ba83b8c0b	525	oLen = endP-startP;
Bartosz Stebel	31:413ba83b8c0b	526
Bartosz Stebel	31:413ba83b8c0b	527	// copy sequence, make space if necessary
Bartosz Stebel	31:413ba83b8c0b	528	if((oLen+1)>bufSpace) {
Bartosz Stebel	31:413ba83b8c0b	529	char newBuf = (char)realloc(uriBuf,oLen+1);
Bartosz Stebel	31:413ba83b8c0b	530	if(newBuf==NULL) {
Bartosz Stebel	31:413ba83b8c0b	531	DBG("Error making space for temporary buffer");
Bartosz Stebel	31:413ba83b8c0b	532	free(uriBuf);
Bartosz Stebel	31:413ba83b8c0b	533	return 1;
Bartosz Stebel	31:413ba83b8c0b	534	}
Bartosz Stebel	31:413ba83b8c0b	535	uriBuf = newBuf;
Bartosz Stebel	31:413ba83b8c0b	536	}
Bartosz Stebel	31:413ba83b8c0b	537
Bartosz Stebel	31:413ba83b8c0b	538	// copy into temporary buffer
Bartosz Stebel	31:413ba83b8c0b	539	memcpy(uriBuf,startP,oLen);
Bartosz Stebel	31:413ba83b8c0b	540	uriBuf[oLen] = 0x00;
Bartosz Stebel	31:413ba83b8c0b	541	DBG("Adding URI_PATH %s",uriBuf);
Bartosz Stebel	31:413ba83b8c0b	542	// add option
Bartosz Stebel	31:413ba83b8c0b	543	if(addOption(COAP_OPTION_URI_PATH,oLen,(uint8_t*)uriBuf)!=0) {
Bartosz Stebel	31:413ba83b8c0b	544	DBG("Error adding option");
Bartosz Stebel	31:413ba83b8c0b	545	return 1;
Bartosz Stebel	31:413ba83b8c0b	546	}
Bartosz Stebel	31:413ba83b8c0b	547	startP = endP;
Bartosz Stebel	31:413ba83b8c0b	548	}
Bartosz Stebel	31:413ba83b8c0b	549
Bartosz Stebel	31:413ba83b8c0b	550	// clean up
Bartosz Stebel	31:413ba83b8c0b	551	free(uriBuf);
Bartosz Stebel	31:413ba83b8c0b	552	return 0;
Bartosz Stebel	31:413ba83b8c0b	553	}
Bartosz Stebel	31:413ba83b8c0b	554	/// Shorthand for adding a URI QUERY to the option list.
Bartosz Stebel	31:413ba83b8c0b	555	/**
Bartosz Stebel	31:413ba83b8c0b	556	* Adds a new option to the CoAP PDU that encodes a URI_QUERY.
Bartosz Stebel	31:413ba83b8c0b	557	*
Bartosz Stebel	31:413ba83b8c0b	558	* \param query The uri query to encode.
Bartosz Stebel	31:413ba83b8c0b	559	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	560	*/
Bartosz Stebel	31:413ba83b8c0b	561	int CoapPDU::addURIQuery(char *query) {
Bartosz Stebel	31:413ba83b8c0b	562	return addOption(COAP_OPTION_URI_QUERY,strlen(query),(uint8_t*)query);
Bartosz Stebel	31:413ba83b8c0b	563	}
Bartosz Stebel	31:413ba83b8c0b	564
Bartosz Stebel	31:413ba83b8c0b	565	/// Concatenates any URI_PATH elements into a single string.
Bartosz Stebel	31:413ba83b8c0b	566	/**
Bartosz Stebel	31:413ba83b8c0b	567	* Parses the PDU options and extracts all URI_PATH elements, concatenating them into a single string with slash separators.
Bartosz Stebel	31:413ba83b8c0b	568	* The produced string will be null terminated.
Bartosz Stebel	31:413ba83b8c0b	569	*
Bartosz Stebel	31:413ba83b8c0b	570	* \param dst Buffer into which to copy the concatenated path elements.
Bartosz Stebel	31:413ba83b8c0b	571	* \param dstlen Length of buffer.
Bartosz Stebel	31:413ba83b8c0b	572	* \param outLen Pointer to integer, into which URI length will be placed.
Bartosz Stebel	31:413ba83b8c0b	573	*
Bartosz Stebel	31:413ba83b8c0b	574	* \return 0 on success, 1 on failure. \b outLen will contain the length of the concatenated elements.
Bartosz Stebel	31:413ba83b8c0b	575	*/
Bartosz Stebel	31:413ba83b8c0b	576	int CoapPDU::getURI(char dst, int dstlen, int outLen) {
Bartosz Stebel	31:413ba83b8c0b	577	if(outLen==NULL) {
Bartosz Stebel	31:413ba83b8c0b	578	DBG("Output length pointer is NULL");
Bartosz Stebel	31:413ba83b8c0b	579	return 1;
Bartosz Stebel	31:413ba83b8c0b	580	}
Bartosz Stebel	31:413ba83b8c0b	581
Bartosz Stebel	31:413ba83b8c0b	582	if(dst==NULL) {
Bartosz Stebel	31:413ba83b8c0b	583	DBG("NULL destination buffer");
Bartosz Stebel	31:413ba83b8c0b	584	*outLen = 0;
Bartosz Stebel	31:413ba83b8c0b	585	return 1;
Bartosz Stebel	31:413ba83b8c0b	586	}
Bartosz Stebel	31:413ba83b8c0b	587
Bartosz Stebel	31:413ba83b8c0b	588	// check destination space
Bartosz Stebel	31:413ba83b8c0b	589	if(dstlen<=0) {
Bartosz Stebel	31:413ba83b8c0b	590	*dst = 0x00;
Bartosz Stebel	31:413ba83b8c0b	591	*outLen = 0;
Bartosz Stebel	31:413ba83b8c0b	592	DBG("Destination buffer too small (0)!");
Bartosz Stebel	31:413ba83b8c0b	593	return 1;
Bartosz Stebel	31:413ba83b8c0b	594	}
Bartosz Stebel	31:413ba83b8c0b	595	// check option count
Bartosz Stebel	31:413ba83b8c0b	596	if(_numOptions==0) {
Bartosz Stebel	31:413ba83b8c0b	597	*dst = 0x00;
Bartosz Stebel	31:413ba83b8c0b	598	*outLen = 0;
Bartosz Stebel	31:413ba83b8c0b	599	return 0;
Bartosz Stebel	31:413ba83b8c0b	600	}
Bartosz Stebel	31:413ba83b8c0b	601	// get options
Bartosz Stebel	31:413ba83b8c0b	602	CoapPDU::CoapOption *options = getOptions();
Bartosz Stebel	31:413ba83b8c0b	603	if(options==NULL) {
Bartosz Stebel	31:413ba83b8c0b	604	*dst = 0x00;
Bartosz Stebel	31:413ba83b8c0b	605	*outLen = 0;
Bartosz Stebel	31:413ba83b8c0b	606	return 0;
Bartosz Stebel	31:413ba83b8c0b	607	}
Bartosz Stebel	31:413ba83b8c0b	608	// iterate over options to construct URI
Bartosz Stebel	31:413ba83b8c0b	609	CoapOption *o = NULL;
Bartosz Stebel	31:413ba83b8c0b	610	int bytesLeft = dstlen-1; // space for 0x00
Bartosz Stebel	31:413ba83b8c0b	611	int oLen = 0;
Bartosz Stebel	31:413ba83b8c0b	612	// add slash at beggining
Bartosz Stebel	31:413ba83b8c0b	613	if(bytesLeft>=1) {
Bartosz Stebel	31:413ba83b8c0b	614	*dst = '/';
Bartosz Stebel	31:413ba83b8c0b	615	dst++;
Bartosz Stebel	31:413ba83b8c0b	616	bytesLeft--;
Bartosz Stebel	31:413ba83b8c0b	617	} else {
Bartosz Stebel	31:413ba83b8c0b	618	DBG("No space for initial slash needed 1, got %d",bytesLeft);
Bartosz Stebel	31:413ba83b8c0b	619	return 1;
Bartosz Stebel	31:413ba83b8c0b	620	}
Bartosz Stebel	31:413ba83b8c0b	621	for(int i=0; i<_numOptions; i++) {
Bartosz Stebel	31:413ba83b8c0b	622	o = &options[i];
Bartosz Stebel	31:413ba83b8c0b	623	oLen = o->optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	624	if(o->optionNumber==COAP_OPTION_URI_PATH) {
Bartosz Stebel	31:413ba83b8c0b	625	// check space
Bartosz Stebel	31:413ba83b8c0b	626	if(oLen>bytesLeft) {
Bartosz Stebel	31:413ba83b8c0b	627	DBG("Destination buffer too small, needed %d, got %d",oLen,bytesLeft);
Bartosz Stebel	31:413ba83b8c0b	628	return 1;
Bartosz Stebel	31:413ba83b8c0b	629	}
Bartosz Stebel	31:413ba83b8c0b	630
Bartosz Stebel	31:413ba83b8c0b	631	// case where single '/' exists
Bartosz Stebel	31:413ba83b8c0b	632	if(oLen==1&&o->optionValuePointer[0]=='/') {
Bartosz Stebel	31:413ba83b8c0b	633	*dst = 0x00;
Bartosz Stebel	31:413ba83b8c0b	634	*outLen = 1;
Bartosz Stebel	31:413ba83b8c0b	635	return 0;
Bartosz Stebel	31:413ba83b8c0b	636	}
Bartosz Stebel	31:413ba83b8c0b	637
Bartosz Stebel	31:413ba83b8c0b	638	// copy URI path component
Bartosz Stebel	31:413ba83b8c0b	639	memcpy(dst,o->optionValuePointer,oLen);
Bartosz Stebel	31:413ba83b8c0b	640
Bartosz Stebel	31:413ba83b8c0b	641	// adjust counters
Bartosz Stebel	31:413ba83b8c0b	642	dst += oLen;
Bartosz Stebel	31:413ba83b8c0b	643	bytesLeft -= oLen;
Bartosz Stebel	31:413ba83b8c0b	644
Bartosz Stebel	31:413ba83b8c0b	645	// add slash following (don't know at this point if another option is coming)
Bartosz Stebel	31:413ba83b8c0b	646	if(bytesLeft>=1) {
Bartosz Stebel	31:413ba83b8c0b	647	*dst = '/';
Bartosz Stebel	31:413ba83b8c0b	648	dst++;
Bartosz Stebel	31:413ba83b8c0b	649	bytesLeft--;
Bartosz Stebel	31:413ba83b8c0b	650	} else {
Bartosz Stebel	31:413ba83b8c0b	651	DBG("Ran out of space after processing option");
Bartosz Stebel	31:413ba83b8c0b	652	return 1;
Bartosz Stebel	31:413ba83b8c0b	653	}
Bartosz Stebel	31:413ba83b8c0b	654	}
Bartosz Stebel	31:413ba83b8c0b	655	}
Bartosz Stebel	31:413ba83b8c0b	656
Bartosz Stebel	31:413ba83b8c0b	657	// remove terminating slash
Bartosz Stebel	31:413ba83b8c0b	658	dst--;
Bartosz Stebel	31:413ba83b8c0b	659	bytesLeft++;
Bartosz Stebel	31:413ba83b8c0b	660	// add null terminating byte (always space since reserved)
Bartosz Stebel	31:413ba83b8c0b	661	*dst = 0x00;
Bartosz Stebel	31:413ba83b8c0b	662	*outLen = (dstlen-1)-bytesLeft;
Bartosz Stebel	31:413ba83b8c0b	663	return 0;
Bartosz Stebel	31:413ba83b8c0b	664	}
Bartosz Stebel	31:413ba83b8c0b	665
Bartosz Stebel	31:413ba83b8c0b	666	/// Sets the CoAP version.
Bartosz Stebel	31:413ba83b8c0b	667	/**
Bartosz Stebel	31:413ba83b8c0b	668	* \param version CoAP version between 0 and 3.
Bartosz Stebel	31:413ba83b8c0b	669	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	670	*/
Bartosz Stebel	31:413ba83b8c0b	671	int CoapPDU::setVersion(uint8_t version) {
Bartosz Stebel	31:413ba83b8c0b	672	if(version>3) {
Bartosz Stebel	31:413ba83b8c0b	673	return 0;
Bartosz Stebel	31:413ba83b8c0b	674	}
Bartosz Stebel	31:413ba83b8c0b	675
Bartosz Stebel	31:413ba83b8c0b	676	_pdu[0] &= 0x3F;
Bartosz Stebel	31:413ba83b8c0b	677	_pdu[0] \|= (version << 6);
Bartosz Stebel	31:413ba83b8c0b	678	return 1;
Bartosz Stebel	31:413ba83b8c0b	679	}
Bartosz Stebel	31:413ba83b8c0b	680
Bartosz Stebel	31:413ba83b8c0b	681	/**
Bartosz Stebel	31:413ba83b8c0b	682	* Gets the CoAP Version.
Bartosz Stebel	31:413ba83b8c0b	683	* @return The CoAP version between 0 and 3.
Bartosz Stebel	31:413ba83b8c0b	684	*/
Bartosz Stebel	31:413ba83b8c0b	685	uint8_t CoapPDU::getVersion() {
Bartosz Stebel	31:413ba83b8c0b	686	return (_pdu[0]&0xC0)>>6;
Bartosz Stebel	31:413ba83b8c0b	687	}
Bartosz Stebel	31:413ba83b8c0b	688
Bartosz Stebel	31:413ba83b8c0b	689	/**
Bartosz Stebel	31:413ba83b8c0b	690	* Sets the type of this CoAP PDU.
Bartosz Stebel	31:413ba83b8c0b	691	* \param mt The type, one of:
Bartosz Stebel	31:413ba83b8c0b	692	* - COAP_CONFIRMABLE
Bartosz Stebel	31:413ba83b8c0b	693	* - COAP_NON_CONFIRMABLE
Bartosz Stebel	31:413ba83b8c0b	694	* - COAP_ACKNOWLEDGEMENT
Bartosz Stebel	31:413ba83b8c0b	695	* - COAP_RESET.
Bartosz Stebel	31:413ba83b8c0b	696	*/
Bartosz Stebel	31:413ba83b8c0b	697	void CoapPDU::setType(CoapPDU::Type mt) {
Bartosz Stebel	31:413ba83b8c0b	698	_pdu[0] &= 0xCF;
Bartosz Stebel	31:413ba83b8c0b	699	_pdu[0] \|= mt;
Bartosz Stebel	31:413ba83b8c0b	700	}
Bartosz Stebel	31:413ba83b8c0b	701
Bartosz Stebel	31:413ba83b8c0b	702	/// Returns the type of the PDU.
Bartosz Stebel	31:413ba83b8c0b	703	CoapPDU::Type CoapPDU::getType() {
Bartosz Stebel	31:413ba83b8c0b	704	return (CoapPDU::Type)(_pdu[0]&0x30);
Bartosz Stebel	31:413ba83b8c0b	705	}
Bartosz Stebel	31:413ba83b8c0b	706
Bartosz Stebel	31:413ba83b8c0b	707
Bartosz Stebel	31:413ba83b8c0b	708	/// Set the token length.
Bartosz Stebel	31:413ba83b8c0b	709	/**
Bartosz Stebel	31:413ba83b8c0b	710	* \param tokenLength The length of the token in bytes, between 0 and 8.
Bartosz Stebel	31:413ba83b8c0b	711	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	712	*/
Bartosz Stebel	31:413ba83b8c0b	713	int CoapPDU::setTokenLength(uint8_t tokenLength) {
Bartosz Stebel	31:413ba83b8c0b	714	if(tokenLength>8)
Bartosz Stebel	31:413ba83b8c0b	715	return 1;
Bartosz Stebel	31:413ba83b8c0b	716
Bartosz Stebel	31:413ba83b8c0b	717	_pdu[0] &= 0xF0;
Bartosz Stebel	31:413ba83b8c0b	718	_pdu[0] \|= tokenLength;
Bartosz Stebel	31:413ba83b8c0b	719	return 0;
Bartosz Stebel	31:413ba83b8c0b	720	}
Bartosz Stebel	31:413ba83b8c0b	721
Bartosz Stebel	31:413ba83b8c0b	722	/// Returns the token length.
Bartosz Stebel	31:413ba83b8c0b	723	int CoapPDU::getTokenLength() {
Bartosz Stebel	31:413ba83b8c0b	724	return _pdu[0] & 0x0F;
Bartosz Stebel	31:413ba83b8c0b	725	}
Bartosz Stebel	31:413ba83b8c0b	726
Bartosz Stebel	31:413ba83b8c0b	727	/// Returns a pointer to the PDU token.
Bartosz Stebel	31:413ba83b8c0b	728	uint8_t* CoapPDU::getTokenPointer() {
Bartosz Stebel	31:413ba83b8c0b	729	if(getTokenLength()==0) {
Bartosz Stebel	31:413ba83b8c0b	730	return NULL;
Bartosz Stebel	31:413ba83b8c0b	731	}
Bartosz Stebel	31:413ba83b8c0b	732	return &_pdu[4];
Bartosz Stebel	31:413ba83b8c0b	733	}
Bartosz Stebel	31:413ba83b8c0b	734
Bartosz Stebel	31:413ba83b8c0b	735	/// Set the PDU token to the supplied byte sequence.
Bartosz Stebel	31:413ba83b8c0b	736	/**
Bartosz Stebel	31:413ba83b8c0b	737	* This sets the PDU token to \b token and sets the token length to \b tokenLength.
Bartosz Stebel	31:413ba83b8c0b	738	* \param token A sequence of bytes representing the token.
Bartosz Stebel	31:413ba83b8c0b	739	* \param tokenLength The length of the byte sequence.
Bartosz Stebel	31:413ba83b8c0b	740	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	741	*/
Bartosz Stebel	31:413ba83b8c0b	742	int CoapPDU::setToken(uint8_t *token, uint8_t tokenLength) {
Bartosz Stebel	31:413ba83b8c0b	743	DBG("Setting token");
Bartosz Stebel	31:413ba83b8c0b	744	if(token==NULL) {
Bartosz Stebel	31:413ba83b8c0b	745	DBG("NULL pointer passed as token reference");
Bartosz Stebel	31:413ba83b8c0b	746	return 1;
Bartosz Stebel	31:413ba83b8c0b	747	}
Bartosz Stebel	31:413ba83b8c0b	748
Bartosz Stebel	31:413ba83b8c0b	749	if(tokenLength==0) {
Bartosz Stebel	31:413ba83b8c0b	750	DBG("Token has zero length");
Bartosz Stebel	31:413ba83b8c0b	751	return 1;
Bartosz Stebel	31:413ba83b8c0b	752	}
Bartosz Stebel	31:413ba83b8c0b	753
Bartosz Stebel	31:413ba83b8c0b	754	// if tokenLength has not changed, just copy the new value
Bartosz Stebel	31:413ba83b8c0b	755	uint8_t oldTokenLength = getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	756	if(tokenLength==oldTokenLength) {
Bartosz Stebel	31:413ba83b8c0b	757	memcpy((void*)&_pdu[4],token,tokenLength);
Bartosz Stebel	31:413ba83b8c0b	758	return 0;
Bartosz Stebel	31:413ba83b8c0b	759	}
Bartosz Stebel	31:413ba83b8c0b	760
Bartosz Stebel	31:413ba83b8c0b	761	// otherwise compute new length of PDU
Bartosz Stebel	31:413ba83b8c0b	762	uint8_t oldPDULength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	763	_pduLength -= oldTokenLength;
Bartosz Stebel	31:413ba83b8c0b	764	_pduLength += tokenLength;
Bartosz Stebel	31:413ba83b8c0b	765
Bartosz Stebel	31:413ba83b8c0b	766	// now, have to shift old memory around, but shift direction depends
Bartosz Stebel	31:413ba83b8c0b	767	// whether pdu is now bigger or smaller
Bartosz Stebel	31:413ba83b8c0b	768	if(_pduLength>oldPDULength) {
Bartosz Stebel	31:413ba83b8c0b	769	// new PDU is bigger, need to allocate space for new PDU
Bartosz Stebel	31:413ba83b8c0b	770	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	771	uint8_t newMemory = (uint8_t)realloc(_pdu,_pduLength);
Bartosz Stebel	31:413ba83b8c0b	772	if(newMemory==NULL) {
Bartosz Stebel	31:413ba83b8c0b	773	// malloc failed
Bartosz Stebel	31:413ba83b8c0b	774	DBG("Failed to allocate memory for token");
Bartosz Stebel	31:413ba83b8c0b	775	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	776	return 1;
Bartosz Stebel	31:413ba83b8c0b	777	}
Bartosz Stebel	31:413ba83b8c0b	778	_pdu = newMemory;
Bartosz Stebel	31:413ba83b8c0b	779	_bufferLength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	780	} else {
Bartosz Stebel	31:413ba83b8c0b	781	// constructed from buffer, check space
Bartosz Stebel	31:413ba83b8c0b	782	if(_pduLength>_bufferLength) {
Bartosz Stebel	31:413ba83b8c0b	783	DBG("Buffer too small to contain token, needed %d, got %d.",_pduLength-oldPDULength,_bufferLength-oldPDULength);
Bartosz Stebel	31:413ba83b8c0b	784	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	785	return 1;
Bartosz Stebel	31:413ba83b8c0b	786	}
Bartosz Stebel	31:413ba83b8c0b	787	}
Bartosz Stebel	31:413ba83b8c0b	788
Bartosz Stebel	31:413ba83b8c0b	789	// and then shift everything after token up to end of new PDU
Bartosz Stebel	31:413ba83b8c0b	790	// memory overlaps so do this manually so to avoid additional mallocs
Bartosz Stebel	31:413ba83b8c0b	791	int shiftOffset = _pduLength-oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	792	int shiftAmount = _pduLength-tokenLength-COAP_HDR_SIZE; // everything after token
Bartosz Stebel	31:413ba83b8c0b	793	shiftPDUUp(shiftOffset,shiftAmount);
Bartosz Stebel	31:413ba83b8c0b	794
Bartosz Stebel	31:413ba83b8c0b	795	// now copy the token into the new space and set official token length
Bartosz Stebel	31:413ba83b8c0b	796	memcpy((void*)&_pdu[4],token,tokenLength);
Bartosz Stebel	31:413ba83b8c0b	797	setTokenLength(tokenLength);
Bartosz Stebel	31:413ba83b8c0b	798
Bartosz Stebel	31:413ba83b8c0b	799	// and return success
Bartosz Stebel	31:413ba83b8c0b	800	return 0;
Bartosz Stebel	31:413ba83b8c0b	801	}
Bartosz Stebel	31:413ba83b8c0b	802
Bartosz Stebel	31:413ba83b8c0b	803	// new PDU is smaller, copy the new token value over the old one
Bartosz Stebel	31:413ba83b8c0b	804	memcpy((void*)&_pdu[4],token,tokenLength);
Bartosz Stebel	31:413ba83b8c0b	805	// and shift everything after the new token down
Bartosz Stebel	31:413ba83b8c0b	806	int startLocation = COAP_HDR_SIZE+tokenLength;
Bartosz Stebel	31:413ba83b8c0b	807	int shiftOffset = oldPDULength-_pduLength;
Bartosz Stebel	31:413ba83b8c0b	808	int shiftAmount = oldPDULength-oldTokenLength-COAP_HDR_SIZE;
Bartosz Stebel	31:413ba83b8c0b	809	shiftPDUDown(startLocation,shiftOffset,shiftAmount);
Bartosz Stebel	31:413ba83b8c0b	810	// then reduce size of buffer
Bartosz Stebel	31:413ba83b8c0b	811	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	812	uint8_t newMemory = (uint8_t)realloc(_pdu,_pduLength);
Bartosz Stebel	31:413ba83b8c0b	813	if(newMemory==NULL) {
Bartosz Stebel	31:413ba83b8c0b	814	// malloc failed, PDU in inconsistent state
Bartosz Stebel	31:413ba83b8c0b	815	DBG("Failed to shrink PDU for new token. PDU probably broken");
Bartosz Stebel	31:413ba83b8c0b	816	return 1;
Bartosz Stebel	31:413ba83b8c0b	817	}
Bartosz Stebel	31:413ba83b8c0b	818	_pdu = newMemory;
Bartosz Stebel	31:413ba83b8c0b	819	_bufferLength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	820	}
Bartosz Stebel	31:413ba83b8c0b	821
Bartosz Stebel	31:413ba83b8c0b	822	// and officially set the new tokenLength
Bartosz Stebel	31:413ba83b8c0b	823	setTokenLength(tokenLength);
Bartosz Stebel	31:413ba83b8c0b	824	return 0;
Bartosz Stebel	31:413ba83b8c0b	825	}
Bartosz Stebel	31:413ba83b8c0b	826
Bartosz Stebel	31:413ba83b8c0b	827	/// Sets the CoAP response code
Bartosz Stebel	31:413ba83b8c0b	828	void CoapPDU::setCode(CoapPDU::Code code) {
Bartosz Stebel	31:413ba83b8c0b	829	_pdu[1] = code;
Bartosz Stebel	31:413ba83b8c0b	830	// there is a limited set of response codes
Bartosz Stebel	31:413ba83b8c0b	831	}
Bartosz Stebel	31:413ba83b8c0b	832
Bartosz Stebel	31:413ba83b8c0b	833	/// Gets the CoAP response code
Bartosz Stebel	31:413ba83b8c0b	834	CoapPDU::Code CoapPDU::getCode() {
Bartosz Stebel	31:413ba83b8c0b	835	return (CoapPDU::Code)_pdu[1];
Bartosz Stebel	31:413ba83b8c0b	836	}
Bartosz Stebel	31:413ba83b8c0b	837
Bartosz Stebel	31:413ba83b8c0b	838
Bartosz Stebel	31:413ba83b8c0b	839	/// Converts a http status code as an integer, to a CoAP code.
Bartosz Stebel	31:413ba83b8c0b	840	/**
Bartosz Stebel	31:413ba83b8c0b	841	* \param httpStatus the HTTP status code as an integer (e.g 200)
Bartosz Stebel	31:413ba83b8c0b	842	* \return The correct corresponding CoapPDU::Code on success,
Bartosz Stebel	31:413ba83b8c0b	843	* CoapPDU::COAP_UNDEFINED_CODE on failure.
Bartosz Stebel	31:413ba83b8c0b	844	*/
Bartosz Stebel	31:413ba83b8c0b	845	CoapPDU::Code CoapPDU::httpStatusToCode(int httpStatus) {
Bartosz Stebel	31:413ba83b8c0b	846	switch(httpStatus) {
Bartosz Stebel	31:413ba83b8c0b	847	case 1:
Bartosz Stebel	31:413ba83b8c0b	848	return CoapPDU::COAP_GET;
Bartosz Stebel	31:413ba83b8c0b	849	case 2:
Bartosz Stebel	31:413ba83b8c0b	850	return CoapPDU::COAP_POST;
Bartosz Stebel	31:413ba83b8c0b	851	case 3:
Bartosz Stebel	31:413ba83b8c0b	852	return CoapPDU::COAP_PUT;
Bartosz Stebel	31:413ba83b8c0b	853	case 4:
Bartosz Stebel	31:413ba83b8c0b	854	return CoapPDU::COAP_DELETE;
Bartosz Stebel	31:413ba83b8c0b	855	case 201:
Bartosz Stebel	31:413ba83b8c0b	856	return CoapPDU::COAP_CREATED;
Bartosz Stebel	31:413ba83b8c0b	857	case 202:
Bartosz Stebel	31:413ba83b8c0b	858	return CoapPDU::COAP_DELETED;
Bartosz Stebel	31:413ba83b8c0b	859	case 203:
Bartosz Stebel	31:413ba83b8c0b	860	return CoapPDU::COAP_VALID;
Bartosz Stebel	31:413ba83b8c0b	861	case 204:
Bartosz Stebel	31:413ba83b8c0b	862	return CoapPDU::COAP_CHANGED;
Bartosz Stebel	31:413ba83b8c0b	863	case 205:
Bartosz Stebel	31:413ba83b8c0b	864	return CoapPDU::COAP_CONTENT;
Bartosz Stebel	31:413ba83b8c0b	865	case 400:
Bartosz Stebel	31:413ba83b8c0b	866	return CoapPDU::COAP_BAD_REQUEST;
Bartosz Stebel	31:413ba83b8c0b	867	case 401:
Bartosz Stebel	31:413ba83b8c0b	868	return CoapPDU::COAP_UNAUTHORIZED;
Bartosz Stebel	31:413ba83b8c0b	869	case 402:
Bartosz Stebel	31:413ba83b8c0b	870	return CoapPDU::COAP_BAD_OPTION;
Bartosz Stebel	31:413ba83b8c0b	871	case 403:
Bartosz Stebel	31:413ba83b8c0b	872	return CoapPDU::COAP_FORBIDDEN;
Bartosz Stebel	31:413ba83b8c0b	873	case 404:
Bartosz Stebel	31:413ba83b8c0b	874	return CoapPDU::COAP_NOT_FOUND;
Bartosz Stebel	31:413ba83b8c0b	875	case 405:
Bartosz Stebel	31:413ba83b8c0b	876	return CoapPDU::COAP_METHOD_NOT_ALLOWED;
Bartosz Stebel	31:413ba83b8c0b	877	case 406:
Bartosz Stebel	31:413ba83b8c0b	878	return CoapPDU::COAP_NOT_ACCEPTABLE;
Bartosz Stebel	31:413ba83b8c0b	879	case 412:
Bartosz Stebel	31:413ba83b8c0b	880	return CoapPDU::COAP_PRECONDITION_FAILED;
Bartosz Stebel	31:413ba83b8c0b	881	case 413:
Bartosz Stebel	31:413ba83b8c0b	882	return CoapPDU::COAP_REQUEST_ENTITY_TOO_LARGE;
Bartosz Stebel	31:413ba83b8c0b	883	case 415:
Bartosz Stebel	31:413ba83b8c0b	884	return CoapPDU::COAP_UNSUPPORTED_CONTENT_FORMAT;
Bartosz Stebel	31:413ba83b8c0b	885	case 500:
Bartosz Stebel	31:413ba83b8c0b	886	return CoapPDU::COAP_INTERNAL_SERVER_ERROR;
Bartosz Stebel	31:413ba83b8c0b	887	case 501:
Bartosz Stebel	31:413ba83b8c0b	888	return CoapPDU::COAP_NOT_IMPLEMENTED;
Bartosz Stebel	31:413ba83b8c0b	889	case 502:
Bartosz Stebel	31:413ba83b8c0b	890	return CoapPDU::COAP_BAD_GATEWAY;
Bartosz Stebel	31:413ba83b8c0b	891	case 503:
Bartosz Stebel	31:413ba83b8c0b	892	return CoapPDU::COAP_SERVICE_UNAVAILABLE;
Bartosz Stebel	31:413ba83b8c0b	893	case 504:
Bartosz Stebel	31:413ba83b8c0b	894	return CoapPDU::COAP_GATEWAY_TIMEOUT;
Bartosz Stebel	31:413ba83b8c0b	895	case 505:
Bartosz Stebel	31:413ba83b8c0b	896	return CoapPDU::COAP_PROXYING_NOT_SUPPORTED;
Bartosz Stebel	31:413ba83b8c0b	897	default:
Bartosz Stebel	31:413ba83b8c0b	898	return CoapPDU::COAP_UNDEFINED_CODE;
Bartosz Stebel	31:413ba83b8c0b	899	}
Bartosz Stebel	31:413ba83b8c0b	900	}
Bartosz Stebel	31:413ba83b8c0b	901
Bartosz Stebel	31:413ba83b8c0b	902	/// Set messageID to the supplied value.
Bartosz Stebel	31:413ba83b8c0b	903	/**
Bartosz Stebel	31:413ba83b8c0b	904	* \param messageID A 16bit message id.
Bartosz Stebel	31:413ba83b8c0b	905	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	906	*/
Bartosz Stebel	31:413ba83b8c0b	907	int CoapPDU::setMessageID(uint16_t messageID) {
Bartosz Stebel	31:413ba83b8c0b	908	// message ID is stored in network byte order
Bartosz Stebel	31:413ba83b8c0b	909	uint16_t networkOrder = htons(messageID);
Bartosz Stebel	31:413ba83b8c0b	910	// bytes 2 and 3 hold the ID
Bartosz Stebel	31:413ba83b8c0b	911	_pdu[2] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	912	_pdu[2] \|= (networkOrder >> 8); // MSB
Bartosz Stebel	31:413ba83b8c0b	913	_pdu[3] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	914	_pdu[3] \|= (networkOrder & 0x00FF); // LSB
Bartosz Stebel	31:413ba83b8c0b	915	return 0;
Bartosz Stebel	31:413ba83b8c0b	916	}
Bartosz Stebel	31:413ba83b8c0b	917
Bartosz Stebel	31:413ba83b8c0b	918	/// Returns the 16 bit message ID of the PDU.
Bartosz Stebel	31:413ba83b8c0b	919	uint16_t CoapPDU::getMessageID() {
Bartosz Stebel	31:413ba83b8c0b	920	// mesasge ID is stored in network byteorder
Bartosz Stebel	31:413ba83b8c0b	921	uint16_t networkOrder = 0x0000;
Bartosz Stebel	31:413ba83b8c0b	922	networkOrder \|= _pdu[2];
Bartosz Stebel	31:413ba83b8c0b	923	networkOrder <<= 8;
Bartosz Stebel	31:413ba83b8c0b	924	networkOrder \|= _pdu[3];
Bartosz Stebel	31:413ba83b8c0b	925	return ntohs(networkOrder);
Bartosz Stebel	31:413ba83b8c0b	926	}
Bartosz Stebel	31:413ba83b8c0b	927
Bartosz Stebel	31:413ba83b8c0b	928	/// Returns the length of the PDU.
Bartosz Stebel	31:413ba83b8c0b	929	int CoapPDU::getPDULength() {
Bartosz Stebel	31:413ba83b8c0b	930	return _pduLength;
Bartosz Stebel	31:413ba83b8c0b	931	}
Bartosz Stebel	31:413ba83b8c0b	932
Bartosz Stebel	31:413ba83b8c0b	933	/// Return the number of options that the PDU has.
Bartosz Stebel	31:413ba83b8c0b	934	int CoapPDU::getNumOptions() {
Bartosz Stebel	31:413ba83b8c0b	935	return _numOptions;
Bartosz Stebel	31:413ba83b8c0b	936	}
Bartosz Stebel	31:413ba83b8c0b	937
Bartosz Stebel	31:413ba83b8c0b	938
Bartosz Stebel	31:413ba83b8c0b	939	/**
Bartosz Stebel	31:413ba83b8c0b	940	* This returns the options as a sequence of structs.
Bartosz Stebel	31:413ba83b8c0b	941	*/
Bartosz Stebel	31:413ba83b8c0b	942	CoapPDU::CoapOption* CoapPDU::getOptions() {
Bartosz Stebel	31:413ba83b8c0b	943	DBG("getOptions() called, %d options.",_numOptions);
Bartosz Stebel	31:413ba83b8c0b	944
Bartosz Stebel	31:413ba83b8c0b	945	uint16_t optionDelta =0, optionNumber = 0, optionValueLength = 0;
Bartosz Stebel	31:413ba83b8c0b	946	int totalLength = 0;
Bartosz Stebel	31:413ba83b8c0b	947
Bartosz Stebel	31:413ba83b8c0b	948	if(_numOptions==0) {
Bartosz Stebel	31:413ba83b8c0b	949	return NULL;
Bartosz Stebel	31:413ba83b8c0b	950	}
Bartosz Stebel	31:413ba83b8c0b	951
Bartosz Stebel	31:413ba83b8c0b	952	// malloc space for options
Bartosz Stebel	31:413ba83b8c0b	953	CoapOption options = (CoapOption)malloc(_numOptions*sizeof(CoapOption));
Bartosz Stebel	31:413ba83b8c0b	954
Bartosz Stebel	31:413ba83b8c0b	955	// first option occurs after token
Bartosz Stebel	31:413ba83b8c0b	956	int optionPos = COAP_HDR_SIZE + getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	957
Bartosz Stebel	31:413ba83b8c0b	958	// walk over options and record information
Bartosz Stebel	31:413ba83b8c0b	959	for(int i=0; i<_numOptions; i++) {
Bartosz Stebel	31:413ba83b8c0b	960	// extract option details
Bartosz Stebel	31:413ba83b8c0b	961	optionDelta = getOptionDelta(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	962	optionNumber += optionDelta;
Bartosz Stebel	31:413ba83b8c0b	963	optionValueLength = getOptionValueLength(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	964	// compute total length
Bartosz Stebel	31:413ba83b8c0b	965	totalLength = 1; // mandatory header
Bartosz Stebel	31:413ba83b8c0b	966	totalLength += computeExtraBytes(optionDelta);
Bartosz Stebel	31:413ba83b8c0b	967	totalLength += computeExtraBytes(optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	968	totalLength += optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	969	// record option details
Bartosz Stebel	31:413ba83b8c0b	970	options[i].optionNumber = optionNumber;
Bartosz Stebel	31:413ba83b8c0b	971	options[i].optionDelta = optionDelta;
Bartosz Stebel	31:413ba83b8c0b	972	options[i].optionValueLength = optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	973	options[i].totalLength = totalLength;
Bartosz Stebel	31:413ba83b8c0b	974	options[i].optionPointer = &_pdu[optionPos];
Bartosz Stebel	31:413ba83b8c0b	975	options[i].optionValuePointer = &_pdu[optionPos+totalLength-optionValueLength];
Bartosz Stebel	31:413ba83b8c0b	976	// move to next option
Bartosz Stebel	31:413ba83b8c0b	977	optionPos += totalLength;
Bartosz Stebel	31:413ba83b8c0b	978	}
Bartosz Stebel	31:413ba83b8c0b	979
Bartosz Stebel	31:413ba83b8c0b	980	return options;
Bartosz Stebel	31:413ba83b8c0b	981	}
Bartosz Stebel	31:413ba83b8c0b	982
Bartosz Stebel	31:413ba83b8c0b	983	/// Add an option to the PDU.
Bartosz Stebel	31:413ba83b8c0b	984	/**
Bartosz Stebel	31:413ba83b8c0b	985	* Unlike other implementations, options can be added in any order, and in-memory manipulation will be
Bartosz Stebel	31:413ba83b8c0b	986	* performed to ensure the correct ordering of options (they use a delta encoding of option numbers).
Bartosz Stebel	31:413ba83b8c0b	987	* Re-ordering memory like this incurs a small performance cost, so if you care about this, then you
Bartosz Stebel	31:413ba83b8c0b	988	* might want to add options in ascending order of option number.
Bartosz Stebel	31:413ba83b8c0b	989	* \param optionNumber The number of the option, see the enum CoapPDU::Option for shorthand notations.
Bartosz Stebel	31:413ba83b8c0b	990	* \param optionLength The length of the option payload in bytes.
Bartosz Stebel	31:413ba83b8c0b	991	* \param optionValue A pointer to the byte sequence that is the option payload (bytes will be copied).
Bartosz Stebel	31:413ba83b8c0b	992	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	993	*/
Bartosz Stebel	31:413ba83b8c0b	994	int CoapPDU::addOption(uint16_t insertedOptionNumber, uint16_t optionValueLength, uint8_t *optionValue) {
Bartosz Stebel	31:413ba83b8c0b	995	// this inserts the option in memory, and re-computes the deltas accordingly
Bartosz Stebel	31:413ba83b8c0b	996	// prevOption <-- insertionPosition
Bartosz Stebel	31:413ba83b8c0b	997	// nextOption
Bartosz Stebel	31:413ba83b8c0b	998
Bartosz Stebel	31:413ba83b8c0b	999	// find insertion location and previous option number
Bartosz Stebel	31:413ba83b8c0b	1000	uint16_t prevOptionNumber = 0; // option number of option before insertion point
Bartosz Stebel	31:413ba83b8c0b	1001	int insertionPosition = findInsertionPosition(insertedOptionNumber,&prevOptionNumber);
Bartosz Stebel	31:413ba83b8c0b	1002	DBG("inserting option at position %d, after option with number: %hu",insertionPosition,prevOptionNumber);
Bartosz Stebel	31:413ba83b8c0b	1003
Bartosz Stebel	31:413ba83b8c0b	1004	// compute option delta length
Bartosz Stebel	31:413ba83b8c0b	1005	uint16_t optionDelta = insertedOptionNumber-prevOptionNumber;
Bartosz Stebel	31:413ba83b8c0b	1006	uint8_t extraDeltaBytes = computeExtraBytes(optionDelta);
Bartosz Stebel	31:413ba83b8c0b	1007
Bartosz Stebel	31:413ba83b8c0b	1008	// compute option length length
Bartosz Stebel	31:413ba83b8c0b	1009	uint16_t extraLengthBytes = computeExtraBytes(optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1010
Bartosz Stebel	31:413ba83b8c0b	1011	// compute total length of option
Bartosz Stebel	31:413ba83b8c0b	1012	uint16_t optionLength = COAP_OPTION_HDR_BYTE + extraDeltaBytes + extraLengthBytes + optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	1013
Bartosz Stebel	31:413ba83b8c0b	1014	// if this is at the end of the PDU, job is done, just malloc and insert
Bartosz Stebel	31:413ba83b8c0b	1015	if(insertionPosition==_pduLength) {
Bartosz Stebel	31:413ba83b8c0b	1016	DBG("Inserting at end of PDU");
Bartosz Stebel	31:413ba83b8c0b	1017	// optionNumber must be biggest added
Bartosz Stebel	31:413ba83b8c0b	1018	_maxAddedOptionNumber = insertedOptionNumber;
Bartosz Stebel	31:413ba83b8c0b	1019
Bartosz Stebel	31:413ba83b8c0b	1020	// set new PDU length and allocate space for extra option
Bartosz Stebel	31:413ba83b8c0b	1021	int oldPDULength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	1022	_pduLength += optionLength;
Bartosz Stebel	31:413ba83b8c0b	1023	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	1024	uint8_t newMemory = (uint8_t)realloc(_pdu,_pduLength);
Bartosz Stebel	31:413ba83b8c0b	1025	if(newMemory==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1026	DBG("Failed to allocate memory for option.");
Bartosz Stebel	31:413ba83b8c0b	1027	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	1028	// malloc failed
Bartosz Stebel	31:413ba83b8c0b	1029	return 1;
Bartosz Stebel	31:413ba83b8c0b	1030	}
Bartosz Stebel	31:413ba83b8c0b	1031	_pdu = newMemory;
Bartosz Stebel	31:413ba83b8c0b	1032	_bufferLength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	1033	} else {
Bartosz Stebel	31:413ba83b8c0b	1034	// constructed from buffer, check space
Bartosz Stebel	31:413ba83b8c0b	1035	if(_pduLength>_bufferLength) {
Bartosz Stebel	31:413ba83b8c0b	1036	DBG("Buffer too small for new option: needed %d, got %d.",_pduLength-oldPDULength,_bufferLength-oldPDULength);
Bartosz Stebel	31:413ba83b8c0b	1037	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	1038	return 1;
Bartosz Stebel	31:413ba83b8c0b	1039	}
Bartosz Stebel	31:413ba83b8c0b	1040	}
Bartosz Stebel	31:413ba83b8c0b	1041
Bartosz Stebel	31:413ba83b8c0b	1042	// insert option at position
Bartosz Stebel	31:413ba83b8c0b	1043	insertOption(insertionPosition,optionDelta,optionValueLength,optionValue);
Bartosz Stebel	31:413ba83b8c0b	1044	_numOptions++;
Bartosz Stebel	31:413ba83b8c0b	1045	return 0;
Bartosz Stebel	31:413ba83b8c0b	1046	}
Bartosz Stebel	31:413ba83b8c0b	1047	// XXX could do 0xFF pdu payload case for changing of dynamically allocated application space SDUs < yeah, if you're insane
Bartosz Stebel	31:413ba83b8c0b	1048
Bartosz Stebel	31:413ba83b8c0b	1049	// the next option might (probably) needs it's delta changing
Bartosz Stebel	31:413ba83b8c0b	1050	// I want to take this into account when allocating space for the new
Bartosz Stebel	31:413ba83b8c0b	1051	// option, to avoid having to do two mallocs, first get info about this option
Bartosz Stebel	31:413ba83b8c0b	1052	int nextOptionDelta = getOptionDelta(&_pdu[insertionPosition]);
Bartosz Stebel	31:413ba83b8c0b	1053	int nextOptionNumber = prevOptionNumber + nextOptionDelta;
Bartosz Stebel	31:413ba83b8c0b	1054	int nextOptionDeltaBytes = computeExtraBytes(nextOptionDelta);
Bartosz Stebel	31:413ba83b8c0b	1055	// recompute option delta, relative to inserted option
Bartosz Stebel	31:413ba83b8c0b	1056	int newNextOptionDelta = nextOptionNumber-insertedOptionNumber;
Bartosz Stebel	31:413ba83b8c0b	1057	int newNextOptionDeltaBytes = computeExtraBytes(newNextOptionDelta);
Bartosz Stebel	31:413ba83b8c0b	1058	// determine adjustment
Bartosz Stebel	31:413ba83b8c0b	1059	int optionDeltaAdjustment = newNextOptionDeltaBytes-nextOptionDeltaBytes;
Bartosz Stebel	31:413ba83b8c0b	1060
Bartosz Stebel	31:413ba83b8c0b	1061	// create space for new option, including adjustment space for option delta
Bartosz Stebel	31:413ba83b8c0b	1062	DBG_PDU();
Bartosz Stebel	31:413ba83b8c0b	1063	DBG("Creating space");
Bartosz Stebel	31:413ba83b8c0b	1064	int mallocLength = optionLength+optionDeltaAdjustment;
Bartosz Stebel	31:413ba83b8c0b	1065	int oldPDULength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	1066	_pduLength += mallocLength;
Bartosz Stebel	31:413ba83b8c0b	1067
Bartosz Stebel	31:413ba83b8c0b	1068	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	1069	uint8_t newMemory = (uint8_t)realloc(_pdu,_pduLength);
Bartosz Stebel	31:413ba83b8c0b	1070	if(newMemory==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1071	DBG("Failed to allocate memory for option");
Bartosz Stebel	31:413ba83b8c0b	1072	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	1073	return 1;
Bartosz Stebel	31:413ba83b8c0b	1074	}
Bartosz Stebel	31:413ba83b8c0b	1075	_pdu = newMemory;
Bartosz Stebel	31:413ba83b8c0b	1076	_bufferLength = _pduLength;
Bartosz Stebel	31:413ba83b8c0b	1077	} else {
Bartosz Stebel	31:413ba83b8c0b	1078	// constructed from buffer, check space
Bartosz Stebel	31:413ba83b8c0b	1079	if(_pduLength>_bufferLength) {
Bartosz Stebel	31:413ba83b8c0b	1080	DBG("Buffer too small to contain option, needed %d, got %d.",_pduLength-oldPDULength,_bufferLength-oldPDULength);
Bartosz Stebel	31:413ba83b8c0b	1081	_pduLength = oldPDULength;
Bartosz Stebel	31:413ba83b8c0b	1082	return 1;
Bartosz Stebel	31:413ba83b8c0b	1083	}
Bartosz Stebel	31:413ba83b8c0b	1084	}
Bartosz Stebel	31:413ba83b8c0b	1085
Bartosz Stebel	31:413ba83b8c0b	1086	// move remainder of PDU data up to create hole for new option
Bartosz Stebel	31:413ba83b8c0b	1087	DBG_PDU();
Bartosz Stebel	31:413ba83b8c0b	1088	DBG("Shifting PDU.");
Bartosz Stebel	31:413ba83b8c0b	1089	shiftPDUUp(mallocLength,_pduLength-(insertionPosition+mallocLength));
Bartosz Stebel	31:413ba83b8c0b	1090	DBG_PDU();
Bartosz Stebel	31:413ba83b8c0b	1091
Bartosz Stebel	31:413ba83b8c0b	1092	// adjust option delta bytes of following option
Bartosz Stebel	31:413ba83b8c0b	1093	// move the option header to the correct position
Bartosz Stebel	31:413ba83b8c0b	1094	int nextHeaderPos = insertionPosition+mallocLength;
Bartosz Stebel	31:413ba83b8c0b	1095	_pdu[nextHeaderPos-optionDeltaAdjustment] = _pdu[nextHeaderPos];
Bartosz Stebel	31:413ba83b8c0b	1096	nextHeaderPos -= optionDeltaAdjustment;
Bartosz Stebel	31:413ba83b8c0b	1097	// and set the new value
Bartosz Stebel	31:413ba83b8c0b	1098	setOptionDelta(nextHeaderPos, newNextOptionDelta);
Bartosz Stebel	31:413ba83b8c0b	1099
Bartosz Stebel	31:413ba83b8c0b	1100	// new option shorter
Bartosz Stebel	31:413ba83b8c0b	1101	// p p n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1102	// p p n n x x x x x -
Bartosz Stebel	31:413ba83b8c0b	1103	// p p - n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1104	// p p - - n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1105	// p p o o n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1106
Bartosz Stebel	31:413ba83b8c0b	1107	// new option longer
Bartosz Stebel	31:413ba83b8c0b	1108	// p p n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1109	// p p n n x x x x x - - -
Bartosz Stebel	31:413ba83b8c0b	1110	// p p - - - n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1111	// p p - - n n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1112	// p p o o n n n x x x x x
Bartosz Stebel	31:413ba83b8c0b	1113
Bartosz Stebel	31:413ba83b8c0b	1114	// note, it can only ever be shorter or the same since if an option was inserted the delta got smaller
Bartosz Stebel	31:413ba83b8c0b	1115	// but I'll leave that little comment in, just to show that it would work even if the delta got bigger
Bartosz Stebel	31:413ba83b8c0b	1116
Bartosz Stebel	31:413ba83b8c0b	1117	// now insert the new option into the gap
Bartosz Stebel	31:413ba83b8c0b	1118	DBGLX("Inserting new option...");
Bartosz Stebel	31:413ba83b8c0b	1119	insertOption(insertionPosition,optionDelta,optionValueLength,optionValue);
Bartosz Stebel	31:413ba83b8c0b	1120	DBGX("done\r\n");
Bartosz Stebel	31:413ba83b8c0b	1121	DBG_PDU();
Bartosz Stebel	31:413ba83b8c0b	1122
Bartosz Stebel	31:413ba83b8c0b	1123	// done, mark it with B!
Bartosz Stebel	31:413ba83b8c0b	1124	return 0;
Bartosz Stebel	31:413ba83b8c0b	1125	}
Bartosz Stebel	31:413ba83b8c0b	1126
Bartosz Stebel	31:413ba83b8c0b	1127	/// Allocate space for a payload.
Bartosz Stebel	31:413ba83b8c0b	1128	/**
Bartosz Stebel	31:413ba83b8c0b	1129	* For dynamically constructed PDUs, this will allocate space for a payload in the object
Bartosz Stebel	31:413ba83b8c0b	1130	* and return a pointer to it. If the PDU was constructed from a buffer, this doesn't
Bartosz Stebel	31:413ba83b8c0b	1131	* malloc anything, it just changes the _pduLength and returns the payload pointer.
Bartosz Stebel	31:413ba83b8c0b	1132	*
Bartosz Stebel	31:413ba83b8c0b	1133	* \note The pointer returned points into the PDU buffer.
Bartosz Stebel	31:413ba83b8c0b	1134	* \param len The length of the payload buffer to allocate.
Bartosz Stebel	31:413ba83b8c0b	1135	* \return Either a pointer to the payload buffer, or NULL if there wasn't enough space / allocation failed.
Bartosz Stebel	31:413ba83b8c0b	1136	*/
Bartosz Stebel	31:413ba83b8c0b	1137	uint8_t* CoapPDU::mallocPayload(int len) {
Bartosz Stebel	31:413ba83b8c0b	1138	DBG("Entering mallocPayload");
Bartosz Stebel	31:413ba83b8c0b	1139	// sanity checks
Bartosz Stebel	31:413ba83b8c0b	1140	if(len==0) {
Bartosz Stebel	31:413ba83b8c0b	1141	DBG("Cannot allocate a zero length payload");
Bartosz Stebel	31:413ba83b8c0b	1142	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1143	}
Bartosz Stebel	31:413ba83b8c0b	1144
Bartosz Stebel	31:413ba83b8c0b	1145	// further sanity
Bartosz Stebel	31:413ba83b8c0b	1146	if(len==_payloadLength) {
Bartosz Stebel	31:413ba83b8c0b	1147	DBG("Space for payload of specified length already exists");
Bartosz Stebel	31:413ba83b8c0b	1148	if(_payloadPointer==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1149	DBG("Garbage PDU. Payload length is %d, but existing _payloadPointer NULL",_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	1150	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1151	}
Bartosz Stebel	31:413ba83b8c0b	1152	return _payloadPointer;
Bartosz Stebel	31:413ba83b8c0b	1153	}
Bartosz Stebel	31:413ba83b8c0b	1154
Bartosz Stebel	31:413ba83b8c0b	1155	DBG("_bufferLength: %d, _pduLength: %d, _payloadLength: %d",_bufferLength,_pduLength,_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	1156
Bartosz Stebel	31:413ba83b8c0b	1157	// might be making payload bigger (including bigger than 0) or smaller
Bartosz Stebel	31:413ba83b8c0b	1158	int markerSpace = 1;
Bartosz Stebel	31:413ba83b8c0b	1159	int payloadSpace = len;
Bartosz Stebel	31:413ba83b8c0b	1160	// is this a resizing?
Bartosz Stebel	31:413ba83b8c0b	1161	if(_payloadLength!=0) {
Bartosz Stebel	31:413ba83b8c0b	1162	// marker already exists
Bartosz Stebel	31:413ba83b8c0b	1163	markerSpace = 0;
Bartosz Stebel	31:413ba83b8c0b	1164	// compute new payload length (can be negative if shrinking payload)
Bartosz Stebel	31:413ba83b8c0b	1165	payloadSpace = len-_payloadLength;
Bartosz Stebel	31:413ba83b8c0b	1166	}
Bartosz Stebel	31:413ba83b8c0b	1167
Bartosz Stebel	31:413ba83b8c0b	1168	// make space for payload (and payload marker if necessary)
Bartosz Stebel	31:413ba83b8c0b	1169	int newLen = _pduLength+payloadSpace+markerSpace;
Bartosz Stebel	31:413ba83b8c0b	1170	if(!_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	1171	uint8_t* newPDU = (uint8_t*)realloc(_pdu,newLen);
Bartosz Stebel	31:413ba83b8c0b	1172	if(newPDU==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1173	DBG("Cannot allocate (or shrink) space for payload");
Bartosz Stebel	31:413ba83b8c0b	1174	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1175	}
Bartosz Stebel	31:413ba83b8c0b	1176	_pdu = newPDU;
Bartosz Stebel	31:413ba83b8c0b	1177	_bufferLength = newLen;
Bartosz Stebel	31:413ba83b8c0b	1178	} else {
Bartosz Stebel	31:413ba83b8c0b	1179	// constructed from buffer, check space
Bartosz Stebel	31:413ba83b8c0b	1180	DBG("newLen: %d, _bufferLength: %d",newLen,_bufferLength);
Bartosz Stebel	31:413ba83b8c0b	1181	if(newLen>_bufferLength) {
Bartosz Stebel	31:413ba83b8c0b	1182	DBG("Buffer too small to contain desired payload, needed %d, got %d.",newLen-_pduLength,_bufferLength-_pduLength);
Bartosz Stebel	31:413ba83b8c0b	1183	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1184	}
Bartosz Stebel	31:413ba83b8c0b	1185	}
Bartosz Stebel	31:413ba83b8c0b	1186
Bartosz Stebel	31:413ba83b8c0b	1187	// deal with fresh allocation case separately
Bartosz Stebel	31:413ba83b8c0b	1188	if(_payloadPointer==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1189	// set payload marker
Bartosz Stebel	31:413ba83b8c0b	1190	_pdu[_pduLength] = 0xFF;
Bartosz Stebel	31:413ba83b8c0b	1191	// payload at end of old PDU
Bartosz Stebel	31:413ba83b8c0b	1192	_payloadPointer = &_pdu[_pduLength+1];
Bartosz Stebel	31:413ba83b8c0b	1193	_pduLength = newLen;
Bartosz Stebel	31:413ba83b8c0b	1194	_payloadLength = len;
Bartosz Stebel	31:413ba83b8c0b	1195	return _payloadPointer;
Bartosz Stebel	31:413ba83b8c0b	1196	}
Bartosz Stebel	31:413ba83b8c0b	1197
Bartosz Stebel	31:413ba83b8c0b	1198	// otherwise, just adjust length of PDU
Bartosz Stebel	31:413ba83b8c0b	1199	_pduLength = newLen;
Bartosz Stebel	31:413ba83b8c0b	1200	_payloadLength = len;
Bartosz Stebel	31:413ba83b8c0b	1201	DBG("Leaving mallocPayload");
Bartosz Stebel	31:413ba83b8c0b	1202	return _payloadPointer;
Bartosz Stebel	31:413ba83b8c0b	1203	}
Bartosz Stebel	31:413ba83b8c0b	1204
Bartosz Stebel	31:413ba83b8c0b	1205	/// Set the payload to the byte sequence specified. Allocates memory in dynamic PDU if necessary.
Bartosz Stebel	31:413ba83b8c0b	1206	/**
Bartosz Stebel	31:413ba83b8c0b	1207	* This will set the payload to \b payload. It will allocate memory in the case where the PDU was
Bartosz Stebel	31:413ba83b8c0b	1208	* constructed without an external buffer.
Bartosz Stebel	31:413ba83b8c0b	1209	*
Bartosz Stebel	31:413ba83b8c0b	1210	* This will fail either if the fixed buffer isn't big enough, or if memory could not be allocated
Bartosz Stebel	31:413ba83b8c0b	1211	* in the non-external-buffer case.
Bartosz Stebel	31:413ba83b8c0b	1212	*
Bartosz Stebel	31:413ba83b8c0b	1213	* \param payload Pointer to payload byte sequence.
Bartosz Stebel	31:413ba83b8c0b	1214	* \param len Length of payload byte sequence.
Bartosz Stebel	31:413ba83b8c0b	1215	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	1216	*/
Bartosz Stebel	31:413ba83b8c0b	1217	int CoapPDU::setPayload(uint8_t *payload, int len) {
Bartosz Stebel	31:413ba83b8c0b	1218	if(payload==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1219	DBG("NULL payload pointer.");
Bartosz Stebel	31:413ba83b8c0b	1220	return 1;
Bartosz Stebel	31:413ba83b8c0b	1221	}
Bartosz Stebel	31:413ba83b8c0b	1222
Bartosz Stebel	31:413ba83b8c0b	1223	uint8_t *payloadPointer = mallocPayload(len);
Bartosz Stebel	31:413ba83b8c0b	1224	if(payloadPointer==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1225	DBG("Allocation of payload failed");
Bartosz Stebel	31:413ba83b8c0b	1226	return 1;
Bartosz Stebel	31:413ba83b8c0b	1227	}
Bartosz Stebel	31:413ba83b8c0b	1228
Bartosz Stebel	31:413ba83b8c0b	1229	// copy payload contents
Bartosz Stebel	31:413ba83b8c0b	1230	memcpy(payloadPointer,payload,len);
Bartosz Stebel	31:413ba83b8c0b	1231
Bartosz Stebel	31:413ba83b8c0b	1232	return 0;
Bartosz Stebel	31:413ba83b8c0b	1233	}
Bartosz Stebel	31:413ba83b8c0b	1234
Bartosz Stebel	31:413ba83b8c0b	1235	/// Returns a pointer to the payload buffer.
Bartosz Stebel	31:413ba83b8c0b	1236	uint8_t* CoapPDU::getPayloadPointer() {
Bartosz Stebel	31:413ba83b8c0b	1237	return _payloadPointer;
Bartosz Stebel	31:413ba83b8c0b	1238	}
Bartosz Stebel	31:413ba83b8c0b	1239
Bartosz Stebel	31:413ba83b8c0b	1240	/// Gets the length of the payload buffer.
Bartosz Stebel	31:413ba83b8c0b	1241	int CoapPDU::getPayloadLength() {
Bartosz Stebel	31:413ba83b8c0b	1242	return _payloadLength;
Bartosz Stebel	31:413ba83b8c0b	1243	}
Bartosz Stebel	31:413ba83b8c0b	1244
Bartosz Stebel	31:413ba83b8c0b	1245	/// Returns a pointer to a buffer which is a copy of the payload buffer (dynamically allocated).
Bartosz Stebel	31:413ba83b8c0b	1246	uint8_t* CoapPDU::getPayloadCopy() {
Bartosz Stebel	31:413ba83b8c0b	1247	if(_payloadLength==0) {
Bartosz Stebel	31:413ba83b8c0b	1248	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1249	}
Bartosz Stebel	31:413ba83b8c0b	1250
Bartosz Stebel	31:413ba83b8c0b	1251	// malloc space for copy
Bartosz Stebel	31:413ba83b8c0b	1252	uint8_t payload = (uint8_t)malloc(_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	1253	if(payload==NULL) {
Bartosz Stebel	31:413ba83b8c0b	1254	DBG("Unable to allocate memory for payload");
Bartosz Stebel	31:413ba83b8c0b	1255	return NULL;
Bartosz Stebel	31:413ba83b8c0b	1256	}
Bartosz Stebel	31:413ba83b8c0b	1257
Bartosz Stebel	31:413ba83b8c0b	1258	// copy and return
Bartosz Stebel	31:413ba83b8c0b	1259	memcpy(payload,_payloadPointer,_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	1260	return payload;
Bartosz Stebel	31:413ba83b8c0b	1261	}
Bartosz Stebel	31:413ba83b8c0b	1262
Bartosz Stebel	31:413ba83b8c0b	1263	/// Shorthand for setting the content-format option.
Bartosz Stebel	31:413ba83b8c0b	1264	/**
Bartosz Stebel	31:413ba83b8c0b	1265	* Sets the content-format to the specified value (adds an option).
Bartosz Stebel	31:413ba83b8c0b	1266	* \param format The content format, one of:
Bartosz Stebel	31:413ba83b8c0b	1267	*
Bartosz Stebel	31:413ba83b8c0b	1268	* - COAP_CONTENT_FORMAT_TEXT_PLAIN
Bartosz Stebel	31:413ba83b8c0b	1269	* - COAP_CONTENT_FORMAT_APP_LINK
Bartosz Stebel	31:413ba83b8c0b	1270	* - COAP_CONTENT_FORMAT_APP_XML
Bartosz Stebel	31:413ba83b8c0b	1271	* - COAP_CONTENT_FORMAT_APP_OCTET
Bartosz Stebel	31:413ba83b8c0b	1272	* - COAP_CONTENT_FORMAT_APP_EXI
Bartosz Stebel	31:413ba83b8c0b	1273	* - COAP_CONTENT_FORMAT_APP_JSON
Bartosz Stebel	31:413ba83b8c0b	1274	*
Bartosz Stebel	31:413ba83b8c0b	1275	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	1276	*/
Bartosz Stebel	31:413ba83b8c0b	1277	int CoapPDU::setContentFormat(CoapPDU::ContentFormat format) {
Bartosz Stebel	31:413ba83b8c0b	1278	if(format==0) {
Bartosz Stebel	31:413ba83b8c0b	1279	// minimal representation means null option value
Bartosz Stebel	31:413ba83b8c0b	1280	if(addOption(CoapPDU::COAP_OPTION_CONTENT_FORMAT,0,NULL)!=0) {
Bartosz Stebel	31:413ba83b8c0b	1281	DBG("Error setting content format");
Bartosz Stebel	31:413ba83b8c0b	1282	return 1;
Bartosz Stebel	31:413ba83b8c0b	1283	}
Bartosz Stebel	31:413ba83b8c0b	1284	return 0;
Bartosz Stebel	31:413ba83b8c0b	1285	}
Bartosz Stebel	31:413ba83b8c0b	1286
Bartosz Stebel	31:413ba83b8c0b	1287	uint8_t c[2];
Bartosz Stebel	31:413ba83b8c0b	1288
Bartosz Stebel	31:413ba83b8c0b	1289	// just use 1 byte if can do it
Bartosz Stebel	31:413ba83b8c0b	1290	if(format<256) {
Bartosz Stebel	31:413ba83b8c0b	1291	c[0] = format;
Bartosz Stebel	31:413ba83b8c0b	1292	if(addOption(CoapPDU::COAP_OPTION_CONTENT_FORMAT,1,c)!=0) {
Bartosz Stebel	31:413ba83b8c0b	1293	DBG("Error setting content format");
Bartosz Stebel	31:413ba83b8c0b	1294	return 1;
Bartosz Stebel	31:413ba83b8c0b	1295	}
Bartosz Stebel	31:413ba83b8c0b	1296	return 0;
Bartosz Stebel	31:413ba83b8c0b	1297	}
Bartosz Stebel	31:413ba83b8c0b	1298
Bartosz Stebel	31:413ba83b8c0b	1299	uint16_t networkOrder = htons(format);
Bartosz Stebel	31:413ba83b8c0b	1300	c[0] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1301	c[0] \|= (networkOrder >> 8); // MSB
Bartosz Stebel	31:413ba83b8c0b	1302	c[1] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1303	c[1] \|= (networkOrder & 0x00FF); // LSB
Bartosz Stebel	31:413ba83b8c0b	1304	if(addOption(CoapPDU::COAP_OPTION_CONTENT_FORMAT,2,c)!=0) {
Bartosz Stebel	31:413ba83b8c0b	1305	DBG("Error setting content format");
Bartosz Stebel	31:413ba83b8c0b	1306	return 1;
Bartosz Stebel	31:413ba83b8c0b	1307	}
Bartosz Stebel	31:413ba83b8c0b	1308	return 0;
Bartosz Stebel	31:413ba83b8c0b	1309	}
Bartosz Stebel	31:413ba83b8c0b	1310
Bartosz Stebel	31:413ba83b8c0b	1311	/// PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE
Bartosz Stebel	31:413ba83b8c0b	1312	/// PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE PRIVATE
Bartosz Stebel	31:413ba83b8c0b	1313
Bartosz Stebel	31:413ba83b8c0b	1314	/// Moves a block of bytes to end of PDU from given offset.
Bartosz Stebel	31:413ba83b8c0b	1315	/**
Bartosz Stebel	31:413ba83b8c0b	1316	* This moves the block of bytes _pdu[_pduLength-1-shiftOffset-shiftAmount] ... _pdu[_pduLength-1-shiftOffset]
Bartosz Stebel	31:413ba83b8c0b	1317	* to the end of the PDU.
Bartosz Stebel	31:413ba83b8c0b	1318	* \param shiftOffset End of block to move, relative to end of PDU (-1).
Bartosz Stebel	31:413ba83b8c0b	1319	* \param shiftAmount Length of block to move.
Bartosz Stebel	31:413ba83b8c0b	1320	*/
Bartosz Stebel	31:413ba83b8c0b	1321	void CoapPDU::shiftPDUUp(int shiftOffset, int shiftAmount) {
Bartosz Stebel	31:413ba83b8c0b	1322	DBG("shiftOffset: %d, shiftAmount: %d",shiftOffset,shiftAmount);
Bartosz Stebel	31:413ba83b8c0b	1323	int destPointer = _pduLength-1;
Bartosz Stebel	31:413ba83b8c0b	1324	int srcPointer = destPointer-shiftOffset;
Bartosz Stebel	31:413ba83b8c0b	1325	while(shiftAmount--) {
Bartosz Stebel	31:413ba83b8c0b	1326	_pdu[destPointer] = _pdu[srcPointer];
Bartosz Stebel	31:413ba83b8c0b	1327	destPointer--;
Bartosz Stebel	31:413ba83b8c0b	1328	srcPointer--;
Bartosz Stebel	31:413ba83b8c0b	1329	}
Bartosz Stebel	31:413ba83b8c0b	1330	}
Bartosz Stebel	31:413ba83b8c0b	1331
Bartosz Stebel	31:413ba83b8c0b	1332	/// Moves a block of bytes down a specified number of steps.
Bartosz Stebel	31:413ba83b8c0b	1333	/**
Bartosz Stebel	31:413ba83b8c0b	1334	* Moves the block of bytes _pdu[startLocation+shiftOffset] ... _pdu[startLocation+shiftOffset+shiftAmount]
Bartosz Stebel	31:413ba83b8c0b	1335	* down to \b startLocation.
Bartosz Stebel	31:413ba83b8c0b	1336	* \param startLocation Index where to shift the block to.
Bartosz Stebel	31:413ba83b8c0b	1337	* \param shiftOffset Where the block starts, relative to start index.
Bartosz Stebel	31:413ba83b8c0b	1338	* \param shiftAmount Length of block to shift.
Bartosz Stebel	31:413ba83b8c0b	1339	*/
Bartosz Stebel	31:413ba83b8c0b	1340	void CoapPDU::shiftPDUDown(int startLocation, int shiftOffset, int shiftAmount) {
Bartosz Stebel	31:413ba83b8c0b	1341	DBG("startLocation: %d, shiftOffset: %d, shiftAmount: %d",startLocation,shiftOffset,shiftAmount);
Bartosz Stebel	31:413ba83b8c0b	1342	int srcPointer = startLocation+shiftOffset;
Bartosz Stebel	31:413ba83b8c0b	1343	while(shiftAmount--) {
Bartosz Stebel	31:413ba83b8c0b	1344	_pdu[startLocation] = _pdu[srcPointer];
Bartosz Stebel	31:413ba83b8c0b	1345	startLocation++;
Bartosz Stebel	31:413ba83b8c0b	1346	srcPointer++;
Bartosz Stebel	31:413ba83b8c0b	1347	}
Bartosz Stebel	31:413ba83b8c0b	1348	}
Bartosz Stebel	31:413ba83b8c0b	1349
Bartosz Stebel	31:413ba83b8c0b	1350	/// Gets the payload length of an option.
Bartosz Stebel	31:413ba83b8c0b	1351	/**
Bartosz Stebel	31:413ba83b8c0b	1352	* \param option Pointer to location of option in PDU.
Bartosz Stebel	31:413ba83b8c0b	1353	* \return The 16 bit option-payload length.
Bartosz Stebel	31:413ba83b8c0b	1354	*/
Bartosz Stebel	31:413ba83b8c0b	1355	uint16_t CoapPDU::getOptionValueLength(uint8_t *option) {
Bartosz Stebel	31:413ba83b8c0b	1356	uint16_t delta = (option[0] & 0xF0) >> 4;
Bartosz Stebel	31:413ba83b8c0b	1357	uint16_t length = (option[0] & 0x0F);
Bartosz Stebel	31:413ba83b8c0b	1358	// no extra bytes
Bartosz Stebel	31:413ba83b8c0b	1359	if(length<13) {
Bartosz Stebel	31:413ba83b8c0b	1360	return length;
Bartosz Stebel	31:413ba83b8c0b	1361	}
Bartosz Stebel	31:413ba83b8c0b	1362
Bartosz Stebel	31:413ba83b8c0b	1363	// extra bytes skip header
Bartosz Stebel	31:413ba83b8c0b	1364	int offset = 1;
Bartosz Stebel	31:413ba83b8c0b	1365	// skip extra option delta bytes
Bartosz Stebel	31:413ba83b8c0b	1366	if(delta==13) {
Bartosz Stebel	31:413ba83b8c0b	1367	offset++;
Bartosz Stebel	31:413ba83b8c0b	1368	} else if(delta==14) {
Bartosz Stebel	31:413ba83b8c0b	1369	offset+=2;
Bartosz Stebel	31:413ba83b8c0b	1370	}
Bartosz Stebel	31:413ba83b8c0b	1371
Bartosz Stebel	31:413ba83b8c0b	1372	// process length
Bartosz Stebel	31:413ba83b8c0b	1373	if(length==13) {
Bartosz Stebel	31:413ba83b8c0b	1374	return (option[offset]+13);
Bartosz Stebel	31:413ba83b8c0b	1375	} else {
Bartosz Stebel	31:413ba83b8c0b	1376	// need to convert to host order
Bartosz Stebel	31:413ba83b8c0b	1377	uint16_t networkOrder = 0x0000;
Bartosz Stebel	31:413ba83b8c0b	1378	networkOrder \|= option[offset++];
Bartosz Stebel	31:413ba83b8c0b	1379	networkOrder <<= 8;
Bartosz Stebel	31:413ba83b8c0b	1380	networkOrder \|= option[offset];
Bartosz Stebel	31:413ba83b8c0b	1381	uint16_t hostOrder = ntohs(networkOrder);
Bartosz Stebel	31:413ba83b8c0b	1382	return hostOrder+269;
Bartosz Stebel	31:413ba83b8c0b	1383	}
Bartosz Stebel	31:413ba83b8c0b	1384
Bartosz Stebel	31:413ba83b8c0b	1385	}
Bartosz Stebel	31:413ba83b8c0b	1386
Bartosz Stebel	31:413ba83b8c0b	1387	/// Gets the delta of an option.
Bartosz Stebel	31:413ba83b8c0b	1388	/**
Bartosz Stebel	31:413ba83b8c0b	1389	* \param option Pointer to location of option in PDU.
Bartosz Stebel	31:413ba83b8c0b	1390	* \return The 16 bit delta.
Bartosz Stebel	31:413ba83b8c0b	1391	*/
Bartosz Stebel	31:413ba83b8c0b	1392	uint16_t CoapPDU::getOptionDelta(uint8_t *option) {
Bartosz Stebel	31:413ba83b8c0b	1393	uint16_t delta = (option[0] & 0xF0) >> 4;
Bartosz Stebel	31:413ba83b8c0b	1394	if(delta<13) {
Bartosz Stebel	31:413ba83b8c0b	1395	return delta;
Bartosz Stebel	31:413ba83b8c0b	1396	} else if(delta==13) {
Bartosz Stebel	31:413ba83b8c0b	1397	// single byte option delta
Bartosz Stebel	31:413ba83b8c0b	1398	return (option[1]+13);
Bartosz Stebel	31:413ba83b8c0b	1399	} else if(delta==14) {
Bartosz Stebel	31:413ba83b8c0b	1400	// double byte option delta
Bartosz Stebel	31:413ba83b8c0b	1401	// need to convert to host order
Bartosz Stebel	31:413ba83b8c0b	1402	uint16_t networkOrder = 0x0000;
Bartosz Stebel	31:413ba83b8c0b	1403	networkOrder \|= option[1];
Bartosz Stebel	31:413ba83b8c0b	1404	networkOrder <<= 8;
Bartosz Stebel	31:413ba83b8c0b	1405	networkOrder \|= option[2];
Bartosz Stebel	31:413ba83b8c0b	1406	uint16_t hostOrder = ntohs(networkOrder);
Bartosz Stebel	31:413ba83b8c0b	1407	return hostOrder+269;
Bartosz Stebel	31:413ba83b8c0b	1408	} else {
Bartosz Stebel	31:413ba83b8c0b	1409	// should only ever occur in payload marker
Bartosz Stebel	31:413ba83b8c0b	1410	return delta;
Bartosz Stebel	31:413ba83b8c0b	1411	}
Bartosz Stebel	31:413ba83b8c0b	1412	}
Bartosz Stebel	31:413ba83b8c0b	1413
Bartosz Stebel	31:413ba83b8c0b	1414	/// Finds the insertion position in the current list of options for the specified option.
Bartosz Stebel	31:413ba83b8c0b	1415	/**
Bartosz Stebel	31:413ba83b8c0b	1416	* \param optionNumber The option's number.
Bartosz Stebel	31:413ba83b8c0b	1417	* \param prevOptionNumber A pointer to a uint16_t which will store the option number of the option previous
Bartosz Stebel	31:413ba83b8c0b	1418	* to the insertion point.
Bartosz Stebel	31:413ba83b8c0b	1419	* \return 0 on success, 1 on failure. \b prevOptionNumber will contain the option number of the option
Bartosz Stebel	31:413ba83b8c0b	1420	* before the insertion position (for example 0 if no options have been inserted).
Bartosz Stebel	31:413ba83b8c0b	1421	*/
Bartosz Stebel	31:413ba83b8c0b	1422	int CoapPDU::findInsertionPosition(uint16_t optionNumber, uint16_t *prevOptionNumber) {
Bartosz Stebel	31:413ba83b8c0b	1423	// zero this for safety
Bartosz Stebel	31:413ba83b8c0b	1424	*prevOptionNumber = 0x00;
Bartosz Stebel	31:413ba83b8c0b	1425
Bartosz Stebel	31:413ba83b8c0b	1426	DBG("_pduLength: %d",_pduLength);
Bartosz Stebel	31:413ba83b8c0b	1427
Bartosz Stebel	31:413ba83b8c0b	1428	// if option is bigger than any currently stored, it goes at the end
Bartosz Stebel	31:413ba83b8c0b	1429	// this includes the case that no option has yet been added
Bartosz Stebel	31:413ba83b8c0b	1430	if( (optionNumber >= _maxAddedOptionNumber) \|\| (_pduLength == (COAP_HDR_SIZE+getTokenLength())) ) {
Bartosz Stebel	31:413ba83b8c0b	1431	*prevOptionNumber = _maxAddedOptionNumber;
Bartosz Stebel	31:413ba83b8c0b	1432	return _pduLength;
Bartosz Stebel	31:413ba83b8c0b	1433	}
Bartosz Stebel	31:413ba83b8c0b	1434
Bartosz Stebel	31:413ba83b8c0b	1435	// otherwise walk over the options
Bartosz Stebel	31:413ba83b8c0b	1436	int optionPos = COAP_HDR_SIZE + getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	1437	uint16_t optionDelta = 0, optionValueLength = 0;
Bartosz Stebel	31:413ba83b8c0b	1438	uint16_t currentOptionNumber = 0;
Bartosz Stebel	31:413ba83b8c0b	1439	while(optionPos<_pduLength && _pdu[optionPos]!=0xFF) {
Bartosz Stebel	31:413ba83b8c0b	1440	optionDelta = getOptionDelta(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	1441	currentOptionNumber += optionDelta;
Bartosz Stebel	31:413ba83b8c0b	1442	optionValueLength = getOptionValueLength(&_pdu[optionPos]);
Bartosz Stebel	31:413ba83b8c0b	1443	// test if this is insertion position
Bartosz Stebel	31:413ba83b8c0b	1444	if(currentOptionNumber>optionNumber) {
Bartosz Stebel	31:413ba83b8c0b	1445	return optionPos;
Bartosz Stebel	31:413ba83b8c0b	1446	}
Bartosz Stebel	31:413ba83b8c0b	1447	// keep track of the last valid option number
Bartosz Stebel	31:413ba83b8c0b	1448	*prevOptionNumber = currentOptionNumber;
Bartosz Stebel	31:413ba83b8c0b	1449	// move onto next option
Bartosz Stebel	31:413ba83b8c0b	1450	optionPos += computeExtraBytes(optionDelta);
Bartosz Stebel	31:413ba83b8c0b	1451	optionPos += computeExtraBytes(optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1452	optionPos += optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	1453	optionPos++; // (for mandatory option header byte)
Bartosz Stebel	31:413ba83b8c0b	1454	}
Bartosz Stebel	31:413ba83b8c0b	1455	return optionPos;
Bartosz Stebel	31:413ba83b8c0b	1456
Bartosz Stebel	31:413ba83b8c0b	1457	}
Bartosz Stebel	31:413ba83b8c0b	1458
Bartosz Stebel	31:413ba83b8c0b	1459	/// CoAP uses a minimal-byte representation for length fields. This returns the number of bytes needed to represent a given length.
Bartosz Stebel	31:413ba83b8c0b	1460	int CoapPDU::computeExtraBytes(uint16_t n) {
Bartosz Stebel	31:413ba83b8c0b	1461	if(n<13) {
Bartosz Stebel	31:413ba83b8c0b	1462	return 0;
Bartosz Stebel	31:413ba83b8c0b	1463	}
Bartosz Stebel	31:413ba83b8c0b	1464
Bartosz Stebel	31:413ba83b8c0b	1465	if(n<269) {
Bartosz Stebel	31:413ba83b8c0b	1466	return 1;
Bartosz Stebel	31:413ba83b8c0b	1467	}
Bartosz Stebel	31:413ba83b8c0b	1468
Bartosz Stebel	31:413ba83b8c0b	1469	return 2;
Bartosz Stebel	31:413ba83b8c0b	1470	}
Bartosz Stebel	31:413ba83b8c0b	1471
Bartosz Stebel	31:413ba83b8c0b	1472	/// Set the option delta to the specified value.
Bartosz Stebel	31:413ba83b8c0b	1473	/**
Bartosz Stebel	31:413ba83b8c0b	1474	* This assumes space has been made for the option delta.
Bartosz Stebel	31:413ba83b8c0b	1475	* \param optionPosition The index of the option in the PDU.
Bartosz Stebel	31:413ba83b8c0b	1476	* \param optionDelta The option delta value to set.
Bartosz Stebel	31:413ba83b8c0b	1477	*/
Bartosz Stebel	31:413ba83b8c0b	1478	void CoapPDU::setOptionDelta(int optionPosition, uint16_t optionDelta) {
Bartosz Stebel	31:413ba83b8c0b	1479	int headerStart = optionPosition;
Bartosz Stebel	31:413ba83b8c0b	1480	// clear the old option delta bytes
Bartosz Stebel	31:413ba83b8c0b	1481	_pdu[headerStart] &= 0x0F;
Bartosz Stebel	31:413ba83b8c0b	1482
Bartosz Stebel	31:413ba83b8c0b	1483	// set the option delta bytes
Bartosz Stebel	31:413ba83b8c0b	1484	if(optionDelta<13) {
Bartosz Stebel	31:413ba83b8c0b	1485	_pdu[headerStart] \|= (optionDelta << 4);
Bartosz Stebel	31:413ba83b8c0b	1486	} else if(optionDelta<269) {
Bartosz Stebel	31:413ba83b8c0b	1487	// 1 extra byte
Bartosz Stebel	31:413ba83b8c0b	1488	_pdu[headerStart] \|= 0xD0; // 13 in first nibble
Bartosz Stebel	31:413ba83b8c0b	1489	_pdu[++optionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1490	_pdu[optionPosition] \|= (optionDelta-13);
Bartosz Stebel	31:413ba83b8c0b	1491	} else {
Bartosz Stebel	31:413ba83b8c0b	1492	// 2 extra bytes, network byte order uint16_t
Bartosz Stebel	31:413ba83b8c0b	1493	_pdu[headerStart] \|= 0xE0; // 14 in first nibble
Bartosz Stebel	31:413ba83b8c0b	1494	optionDelta = htons(optionDelta-269);
Bartosz Stebel	31:413ba83b8c0b	1495	_pdu[++optionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1496	_pdu[optionPosition] \|= (optionDelta >> 8); // MSB
Bartosz Stebel	31:413ba83b8c0b	1497	_pdu[++optionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1498	_pdu[optionPosition] \|= (optionDelta & 0x00FF); // LSB
Bartosz Stebel	31:413ba83b8c0b	1499	}
Bartosz Stebel	31:413ba83b8c0b	1500	}
Bartosz Stebel	31:413ba83b8c0b	1501
Bartosz Stebel	31:413ba83b8c0b	1502	/// Insert an option in-memory at the specified location.
Bartosz Stebel	31:413ba83b8c0b	1503	/**
Bartosz Stebel	31:413ba83b8c0b	1504	* This assumes that there is enough space at the location specified.
Bartosz Stebel	31:413ba83b8c0b	1505	* \param insertionPosition Position in the PDU where the option should be placed.
Bartosz Stebel	31:413ba83b8c0b	1506	* \param optionDelta The delta value for the option.
Bartosz Stebel	31:413ba83b8c0b	1507	* \param optionValueLength The length of the option value.
Bartosz Stebel	31:413ba83b8c0b	1508	* \param optionValue A pointer to the sequence of bytes representing the option value.
Bartosz Stebel	31:413ba83b8c0b	1509	* \return 0 on success, 1 on failure.
Bartosz Stebel	31:413ba83b8c0b	1510	*/
Bartosz Stebel	31:413ba83b8c0b	1511	int CoapPDU::insertOption(
Bartosz Stebel	31:413ba83b8c0b	1512	int insertionPosition,
Bartosz Stebel	31:413ba83b8c0b	1513	uint16_t optionDelta,
Bartosz Stebel	31:413ba83b8c0b	1514	uint16_t optionValueLength,
Bartosz Stebel	31:413ba83b8c0b	1515	uint8_t *optionValue) {
Bartosz Stebel	31:413ba83b8c0b	1516
Bartosz Stebel	31:413ba83b8c0b	1517	int headerStart = insertionPosition;
Bartosz Stebel	31:413ba83b8c0b	1518
Bartosz Stebel	31:413ba83b8c0b	1519	// clear old option header start
Bartosz Stebel	31:413ba83b8c0b	1520	_pdu[headerStart] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1521
Bartosz Stebel	31:413ba83b8c0b	1522	// set the option delta bytes
Bartosz Stebel	31:413ba83b8c0b	1523	if(optionDelta<13) {
Bartosz Stebel	31:413ba83b8c0b	1524	_pdu[headerStart] \|= (optionDelta << 4);
Bartosz Stebel	31:413ba83b8c0b	1525	} else if(optionDelta<269) {
Bartosz Stebel	31:413ba83b8c0b	1526	// 1 extra byte
Bartosz Stebel	31:413ba83b8c0b	1527	_pdu[headerStart] \|= 0xD0; // 13 in first nibble
Bartosz Stebel	31:413ba83b8c0b	1528	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1529	_pdu[insertionPosition] \|= (optionDelta-13);
Bartosz Stebel	31:413ba83b8c0b	1530	} else {
Bartosz Stebel	31:413ba83b8c0b	1531	// 2 extra bytes, network byte order uint16_t
Bartosz Stebel	31:413ba83b8c0b	1532	_pdu[headerStart] \|= 0xE0; // 14 in first nibble
Bartosz Stebel	31:413ba83b8c0b	1533	optionDelta = htons(optionDelta-269);
Bartosz Stebel	31:413ba83b8c0b	1534	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1535	_pdu[insertionPosition] \|= (optionDelta >> 8); // MSB
Bartosz Stebel	31:413ba83b8c0b	1536	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1537	_pdu[insertionPosition] \|= (optionDelta & 0x00FF); // LSB
Bartosz Stebel	31:413ba83b8c0b	1538	}
Bartosz Stebel	31:413ba83b8c0b	1539
Bartosz Stebel	31:413ba83b8c0b	1540	// set the option value length bytes
Bartosz Stebel	31:413ba83b8c0b	1541	if(optionValueLength<13) {
Bartosz Stebel	31:413ba83b8c0b	1542	_pdu[headerStart] \|= (optionValueLength & 0x000F);
Bartosz Stebel	31:413ba83b8c0b	1543	} else if(optionValueLength<269) {
Bartosz Stebel	31:413ba83b8c0b	1544	_pdu[headerStart] \|= 0x0D; // 13 in second nibble
Bartosz Stebel	31:413ba83b8c0b	1545	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1546	_pdu[insertionPosition] \|= (optionValueLength-13);
Bartosz Stebel	31:413ba83b8c0b	1547	} else {
Bartosz Stebel	31:413ba83b8c0b	1548	_pdu[headerStart] \|= 0x0E; // 14 in second nibble
Bartosz Stebel	31:413ba83b8c0b	1549	// this is in network byte order
Bartosz Stebel	31:413ba83b8c0b	1550	DBG("optionValueLength: %u",optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1551	uint16_t networkOrder = htons(optionValueLength-269);
Bartosz Stebel	31:413ba83b8c0b	1552	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1553	_pdu[insertionPosition] \|= (networkOrder >> 8); // MSB
Bartosz Stebel	31:413ba83b8c0b	1554	_pdu[++insertionPosition] &= 0x00;
Bartosz Stebel	31:413ba83b8c0b	1555	_pdu[insertionPosition] \|= (networkOrder & 0x00FF); // LSB
Bartosz Stebel	31:413ba83b8c0b	1556	}
Bartosz Stebel	31:413ba83b8c0b	1557
Bartosz Stebel	31:413ba83b8c0b	1558	// and finally copy the option value itself
Bartosz Stebel	31:413ba83b8c0b	1559	memcpy(&_pdu[++insertionPosition],optionValue,optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1560
Bartosz Stebel	31:413ba83b8c0b	1561	return 0;
Bartosz Stebel	31:413ba83b8c0b	1562	}
Bartosz Stebel	31:413ba83b8c0b	1563
Bartosz Stebel	31:413ba83b8c0b	1564	// DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG
Bartosz Stebel	31:413ba83b8c0b	1565	// DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG DEBUG
Bartosz Stebel	31:413ba83b8c0b	1566
Bartosz Stebel	31:413ba83b8c0b	1567	/// Prints the PDU in human-readable format.
Bartosz Stebel	31:413ba83b8c0b	1568	void CoapPDU::printHuman() {
Bartosz Stebel	31:413ba83b8c0b	1569	INFOX("__________________\r\n");
Bartosz Stebel	31:413ba83b8c0b	1570	if(_constructedFromBuffer) {
Bartosz Stebel	31:413ba83b8c0b	1571	INFOX("PDU was constructed from buffer of %d bytes\r\n",_bufferLength);
Bartosz Stebel	31:413ba83b8c0b	1572	}
Bartosz Stebel	31:413ba83b8c0b	1573	INFOX("PDU is %d bytes long\r\n",_pduLength);
Bartosz Stebel	31:413ba83b8c0b	1574	INFOX("CoAP Version: %d\r\n",getVersion());
Bartosz Stebel	31:413ba83b8c0b	1575	INFOX("Message Type: ");
Bartosz Stebel	31:413ba83b8c0b	1576	switch(getType()) {
Bartosz Stebel	31:413ba83b8c0b	1577	case COAP_CONFIRMABLE:
Bartosz Stebel	31:413ba83b8c0b	1578	INFOX("Confirmable\r\n");
Bartosz Stebel	31:413ba83b8c0b	1579	break;
Bartosz Stebel	31:413ba83b8c0b	1580
Bartosz Stebel	31:413ba83b8c0b	1581	case COAP_NON_CONFIRMABLE:
Bartosz Stebel	31:413ba83b8c0b	1582	INFOX("Non-Confirmable\r\n");
Bartosz Stebel	31:413ba83b8c0b	1583	break;
Bartosz Stebel	31:413ba83b8c0b	1584
Bartosz Stebel	31:413ba83b8c0b	1585	case COAP_ACKNOWLEDGEMENT:
Bartosz Stebel	31:413ba83b8c0b	1586	INFOX("Acknowledgement\r\n");
Bartosz Stebel	31:413ba83b8c0b	1587	break;
Bartosz Stebel	31:413ba83b8c0b	1588
Bartosz Stebel	31:413ba83b8c0b	1589	case COAP_RESET:
Bartosz Stebel	31:413ba83b8c0b	1590	INFOX("Reset\r\n");
Bartosz Stebel	31:413ba83b8c0b	1591	break;
Bartosz Stebel	31:413ba83b8c0b	1592	}
Bartosz Stebel	31:413ba83b8c0b	1593	INFOX("Token length: %d\r\n",getTokenLength());
Bartosz Stebel	31:413ba83b8c0b	1594	INFOX("Code: ");
Bartosz Stebel	31:413ba83b8c0b	1595	switch(getCode()) {
Bartosz Stebel	31:413ba83b8c0b	1596	case COAP_EMPTY:
Bartosz Stebel	31:413ba83b8c0b	1597	INFOX("0.00 Empty");
Bartosz Stebel	31:413ba83b8c0b	1598	break;
Bartosz Stebel	31:413ba83b8c0b	1599	case COAP_GET:
Bartosz Stebel	31:413ba83b8c0b	1600	INFOX("0.01 GET");
Bartosz Stebel	31:413ba83b8c0b	1601	break;
Bartosz Stebel	31:413ba83b8c0b	1602	case COAP_POST:
Bartosz Stebel	31:413ba83b8c0b	1603	INFOX("0.02 POST");
Bartosz Stebel	31:413ba83b8c0b	1604	break;
Bartosz Stebel	31:413ba83b8c0b	1605	case COAP_PUT:
Bartosz Stebel	31:413ba83b8c0b	1606	INFOX("0.03 PUT");
Bartosz Stebel	31:413ba83b8c0b	1607	break;
Bartosz Stebel	31:413ba83b8c0b	1608	case COAP_DELETE:
Bartosz Stebel	31:413ba83b8c0b	1609	INFOX("0.04 DELETE");
Bartosz Stebel	31:413ba83b8c0b	1610	break;
Bartosz Stebel	31:413ba83b8c0b	1611	case COAP_CREATED:
Bartosz Stebel	31:413ba83b8c0b	1612	INFOX("2.01 Created");
Bartosz Stebel	31:413ba83b8c0b	1613	break;
Bartosz Stebel	31:413ba83b8c0b	1614	case COAP_DELETED:
Bartosz Stebel	31:413ba83b8c0b	1615	INFOX("2.02 Deleted");
Bartosz Stebel	31:413ba83b8c0b	1616	break;
Bartosz Stebel	31:413ba83b8c0b	1617	case COAP_VALID:
Bartosz Stebel	31:413ba83b8c0b	1618	INFOX("2.03 Valid");
Bartosz Stebel	31:413ba83b8c0b	1619	break;
Bartosz Stebel	31:413ba83b8c0b	1620	case COAP_CHANGED:
Bartosz Stebel	31:413ba83b8c0b	1621	INFOX("2.04 Changed");
Bartosz Stebel	31:413ba83b8c0b	1622	break;
Bartosz Stebel	31:413ba83b8c0b	1623	case COAP_CONTENT:
Bartosz Stebel	31:413ba83b8c0b	1624	INFOX("2.05 Content");
Bartosz Stebel	31:413ba83b8c0b	1625	break;
Bartosz Stebel	31:413ba83b8c0b	1626	case COAP_BAD_REQUEST:
Bartosz Stebel	31:413ba83b8c0b	1627	INFOX("4.00 Bad Request");
Bartosz Stebel	31:413ba83b8c0b	1628	break;
Bartosz Stebel	31:413ba83b8c0b	1629	case COAP_UNAUTHORIZED:
Bartosz Stebel	31:413ba83b8c0b	1630	INFOX("4.01 Unauthorized");
Bartosz Stebel	31:413ba83b8c0b	1631	break;
Bartosz Stebel	31:413ba83b8c0b	1632	case COAP_BAD_OPTION:
Bartosz Stebel	31:413ba83b8c0b	1633	INFOX("4.02 Bad Option");
Bartosz Stebel	31:413ba83b8c0b	1634	break;
Bartosz Stebel	31:413ba83b8c0b	1635	case COAP_FORBIDDEN:
Bartosz Stebel	31:413ba83b8c0b	1636	INFOX("4.03 Forbidden");
Bartosz Stebel	31:413ba83b8c0b	1637	break;
Bartosz Stebel	31:413ba83b8c0b	1638	case COAP_NOT_FOUND:
Bartosz Stebel	31:413ba83b8c0b	1639	INFOX("4.04 Not Found");
Bartosz Stebel	31:413ba83b8c0b	1640	break;
Bartosz Stebel	31:413ba83b8c0b	1641	case COAP_METHOD_NOT_ALLOWED:
Bartosz Stebel	31:413ba83b8c0b	1642	INFOX("4.05 Method Not Allowed");
Bartosz Stebel	31:413ba83b8c0b	1643	break;
Bartosz Stebel	31:413ba83b8c0b	1644	case COAP_NOT_ACCEPTABLE:
Bartosz Stebel	31:413ba83b8c0b	1645	INFOX("4.06 Not Acceptable");
Bartosz Stebel	31:413ba83b8c0b	1646	break;
Bartosz Stebel	31:413ba83b8c0b	1647	case COAP_PRECONDITION_FAILED:
Bartosz Stebel	31:413ba83b8c0b	1648	INFOX("4.12 Precondition Failed");
Bartosz Stebel	31:413ba83b8c0b	1649	break;
Bartosz Stebel	31:413ba83b8c0b	1650	case COAP_REQUEST_ENTITY_TOO_LARGE:
Bartosz Stebel	31:413ba83b8c0b	1651	INFOX("4.13 Request Entity Too Large");
Bartosz Stebel	31:413ba83b8c0b	1652	break;
Bartosz Stebel	31:413ba83b8c0b	1653	case COAP_UNSUPPORTED_CONTENT_FORMAT:
Bartosz Stebel	31:413ba83b8c0b	1654	INFOX("4.15 Unsupported Content-Format");
Bartosz Stebel	31:413ba83b8c0b	1655	break;
Bartosz Stebel	31:413ba83b8c0b	1656	case COAP_INTERNAL_SERVER_ERROR:
Bartosz Stebel	31:413ba83b8c0b	1657	INFOX("5.00 Internal Server Error");
Bartosz Stebel	31:413ba83b8c0b	1658	break;
Bartosz Stebel	31:413ba83b8c0b	1659	case COAP_NOT_IMPLEMENTED:
Bartosz Stebel	31:413ba83b8c0b	1660	INFOX("5.01 Not Implemented");
Bartosz Stebel	31:413ba83b8c0b	1661	break;
Bartosz Stebel	31:413ba83b8c0b	1662	case COAP_BAD_GATEWAY:
Bartosz Stebel	31:413ba83b8c0b	1663	INFOX("5.02 Bad Gateway");
Bartosz Stebel	31:413ba83b8c0b	1664	break;
Bartosz Stebel	31:413ba83b8c0b	1665	case COAP_SERVICE_UNAVAILABLE:
Bartosz Stebel	31:413ba83b8c0b	1666	INFOX("5.03 Service Unavailable");
Bartosz Stebel	31:413ba83b8c0b	1667	break;
Bartosz Stebel	31:413ba83b8c0b	1668	case COAP_GATEWAY_TIMEOUT:
Bartosz Stebel	31:413ba83b8c0b	1669	INFOX("5.04 Gateway Timeout");
Bartosz Stebel	31:413ba83b8c0b	1670	break;
Bartosz Stebel	31:413ba83b8c0b	1671	case COAP_PROXYING_NOT_SUPPORTED:
Bartosz Stebel	31:413ba83b8c0b	1672	INFOX("5.05 Proxying Not Supported");
Bartosz Stebel	31:413ba83b8c0b	1673	break;
Bartosz Stebel	31:413ba83b8c0b	1674	case COAP_UNDEFINED_CODE:
Bartosz Stebel	31:413ba83b8c0b	1675	INFOX("Undefined Code");
Bartosz Stebel	31:413ba83b8c0b	1676	break;
Bartosz Stebel	31:413ba83b8c0b	1677	}
Bartosz Stebel	31:413ba83b8c0b	1678	INFOX("\r\n");
Bartosz Stebel	31:413ba83b8c0b	1679
Bartosz Stebel	31:413ba83b8c0b	1680	// print message ID
Bartosz Stebel	31:413ba83b8c0b	1681	INFOX("Message ID: %u\r\n",getMessageID());
Bartosz Stebel	31:413ba83b8c0b	1682
Bartosz Stebel	31:413ba83b8c0b	1683	// print token value
Bartosz Stebel	31:413ba83b8c0b	1684	int tokenLength = getTokenLength();
Bartosz Stebel	31:413ba83b8c0b	1685	uint8_t *tokenPointer = getPDUPointer()+COAP_HDR_SIZE;
Bartosz Stebel	31:413ba83b8c0b	1686	if(tokenLength==0) {
Bartosz Stebel	31:413ba83b8c0b	1687	INFOX("No token.\r\n");
Bartosz Stebel	31:413ba83b8c0b	1688	} else {
Bartosz Stebel	31:413ba83b8c0b	1689	INFOX("Token of %d bytes.\r\n",tokenLength);
Bartosz Stebel	31:413ba83b8c0b	1690	INFOX(" Value: 0x");
Bartosz Stebel	31:413ba83b8c0b	1691	for(int j=0; j<tokenLength; j++) {
Bartosz Stebel	31:413ba83b8c0b	1692	INFOX("%.2x",tokenPointer[j]);
Bartosz Stebel	31:413ba83b8c0b	1693	}
Bartosz Stebel	31:413ba83b8c0b	1694	INFOX("\r\n");
Bartosz Stebel	31:413ba83b8c0b	1695	}
Bartosz Stebel	31:413ba83b8c0b	1696
Bartosz Stebel	31:413ba83b8c0b	1697	// print options
Bartosz Stebel	31:413ba83b8c0b	1698	CoapPDU::CoapOption* options = getOptions();
Bartosz Stebel	31:413ba83b8c0b	1699	INFOX("%d options:\r\n",_numOptions);
Bartosz Stebel	31:413ba83b8c0b	1700	for(int i=0; i<_numOptions; i++) {
Bartosz Stebel	31:413ba83b8c0b	1701	INFOX("OPTION (%d/%d)\r\n",i,_numOptions);
Bartosz Stebel	31:413ba83b8c0b	1702	INFOX(" Option number (delta): %hu (%hu)\r\n",options[i].optionNumber,options[i].optionDelta);
Bartosz Stebel	31:413ba83b8c0b	1703	INFOX(" Name: ");
Bartosz Stebel	31:413ba83b8c0b	1704	switch(options[i].optionNumber) {
Bartosz Stebel	31:413ba83b8c0b	1705	case COAP_OPTION_IF_MATCH:
Bartosz Stebel	31:413ba83b8c0b	1706	INFOX("IF_MATCH");
Bartosz Stebel	31:413ba83b8c0b	1707	break;
Bartosz Stebel	31:413ba83b8c0b	1708	case COAP_OPTION_URI_HOST:
Bartosz Stebel	31:413ba83b8c0b	1709	INFOX("URI_HOST");
Bartosz Stebel	31:413ba83b8c0b	1710	break;
Bartosz Stebel	31:413ba83b8c0b	1711	case COAP_OPTION_ETAG:
Bartosz Stebel	31:413ba83b8c0b	1712	INFOX("ETAG");
Bartosz Stebel	31:413ba83b8c0b	1713	break;
Bartosz Stebel	31:413ba83b8c0b	1714	case COAP_OPTION_IF_NONE_MATCH:
Bartosz Stebel	31:413ba83b8c0b	1715	INFOX("IF_NONE_MATCH");
Bartosz Stebel	31:413ba83b8c0b	1716	break;
Bartosz Stebel	31:413ba83b8c0b	1717	case COAP_OPTION_OBSERVE:
Bartosz Stebel	31:413ba83b8c0b	1718	INFOX("OBSERVE");
Bartosz Stebel	31:413ba83b8c0b	1719	break;
Bartosz Stebel	31:413ba83b8c0b	1720	case COAP_OPTION_URI_PORT:
Bartosz Stebel	31:413ba83b8c0b	1721	INFOX("URI_PORT");
Bartosz Stebel	31:413ba83b8c0b	1722	break;
Bartosz Stebel	31:413ba83b8c0b	1723	case COAP_OPTION_LOCATION_PATH:
Bartosz Stebel	31:413ba83b8c0b	1724	INFOX("LOCATION_PATH");
Bartosz Stebel	31:413ba83b8c0b	1725	break;
Bartosz Stebel	31:413ba83b8c0b	1726	case COAP_OPTION_URI_PATH:
Bartosz Stebel	31:413ba83b8c0b	1727	INFOX("URI_PATH");
Bartosz Stebel	31:413ba83b8c0b	1728	break;
Bartosz Stebel	31:413ba83b8c0b	1729	case COAP_OPTION_CONTENT_FORMAT:
Bartosz Stebel	31:413ba83b8c0b	1730	INFOX("CONTENT_FORMAT");
Bartosz Stebel	31:413ba83b8c0b	1731	break;
Bartosz Stebel	31:413ba83b8c0b	1732	case COAP_OPTION_MAX_AGE:
Bartosz Stebel	31:413ba83b8c0b	1733	INFOX("MAX_AGE");
Bartosz Stebel	31:413ba83b8c0b	1734	break;
Bartosz Stebel	31:413ba83b8c0b	1735	case COAP_OPTION_URI_QUERY:
Bartosz Stebel	31:413ba83b8c0b	1736	INFOX("URI_QUERY");
Bartosz Stebel	31:413ba83b8c0b	1737	break;
Bartosz Stebel	31:413ba83b8c0b	1738	case COAP_OPTION_ACCEPT:
Bartosz Stebel	31:413ba83b8c0b	1739	INFOX("ACCEPT");
Bartosz Stebel	31:413ba83b8c0b	1740	break;
Bartosz Stebel	31:413ba83b8c0b	1741	case COAP_OPTION_LOCATION_QUERY:
Bartosz Stebel	31:413ba83b8c0b	1742	INFOX("LOCATION_QUERY");
Bartosz Stebel	31:413ba83b8c0b	1743	break;
Bartosz Stebel	31:413ba83b8c0b	1744	case COAP_OPTION_PROXY_URI:
Bartosz Stebel	31:413ba83b8c0b	1745	INFOX("PROXY_URI");
Bartosz Stebel	31:413ba83b8c0b	1746	break;
Bartosz Stebel	31:413ba83b8c0b	1747	case COAP_OPTION_PROXY_SCHEME:
Bartosz Stebel	31:413ba83b8c0b	1748	INFOX("PROXY_SCHEME");
Bartosz Stebel	31:413ba83b8c0b	1749	break;
Bartosz Stebel	31:413ba83b8c0b	1750	case COAP_OPTION_BLOCK1:
Bartosz Stebel	31:413ba83b8c0b	1751	INFOX("BLOCK1");
Bartosz Stebel	31:413ba83b8c0b	1752	break;
Bartosz Stebel	31:413ba83b8c0b	1753	case COAP_OPTION_BLOCK2:
Bartosz Stebel	31:413ba83b8c0b	1754	INFOX("BLOCK2");
Bartosz Stebel	31:413ba83b8c0b	1755	break;
Bartosz Stebel	31:413ba83b8c0b	1756	case COAP_OPTION_SIZE1:
Bartosz Stebel	31:413ba83b8c0b	1757	INFOX("SIZE1");
Bartosz Stebel	31:413ba83b8c0b	1758	break;
Bartosz Stebel	31:413ba83b8c0b	1759	case COAP_OPTION_SIZE2:
Bartosz Stebel	31:413ba83b8c0b	1760	INFOX("SIZE2");
Bartosz Stebel	31:413ba83b8c0b	1761	break;
Bartosz Stebel	31:413ba83b8c0b	1762	default:
Bartosz Stebel	31:413ba83b8c0b	1763	INFOX("Unknown option");
Bartosz Stebel	31:413ba83b8c0b	1764	break;
Bartosz Stebel	31:413ba83b8c0b	1765	}
Bartosz Stebel	31:413ba83b8c0b	1766	INFOX("\r\n");
Bartosz Stebel	31:413ba83b8c0b	1767	INFOX(" Value length: %u\r\n",options[i].optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1768	INFOX(" Value: \"");
Bartosz Stebel	31:413ba83b8c0b	1769	for(int j=0; j<options[i].optionValueLength; j++) {
Bartosz Stebel	31:413ba83b8c0b	1770	char c = options[i].optionValuePointer[j];
Bartosz Stebel	31:413ba83b8c0b	1771	if((c>='!'&&c<='~')\|\|c==' ') {
Bartosz Stebel	31:413ba83b8c0b	1772	INFOX("%c",c);
Bartosz Stebel	31:413ba83b8c0b	1773	} else {
Bartosz Stebel	31:413ba83b8c0b	1774	INFOX("\\%.2d",c);
Bartosz Stebel	31:413ba83b8c0b	1775	}
Bartosz Stebel	31:413ba83b8c0b	1776	}
Bartosz Stebel	31:413ba83b8c0b	1777	INFOX("\"\r\n");
Bartosz Stebel	31:413ba83b8c0b	1778	}
Bartosz Stebel	31:413ba83b8c0b	1779
Bartosz Stebel	31:413ba83b8c0b	1780	// print payload
Bartosz Stebel	31:413ba83b8c0b	1781	if(_payloadLength==0) {
Bartosz Stebel	31:413ba83b8c0b	1782	INFOX("No payload.\r\n");
Bartosz Stebel	31:413ba83b8c0b	1783	} else {
Bartosz Stebel	31:413ba83b8c0b	1784	INFOX("Payload of %d bytes\r\n",_payloadLength);
Bartosz Stebel	31:413ba83b8c0b	1785	INFOX(" Value: \"");
Bartosz Stebel	31:413ba83b8c0b	1786	for(int j=0; j<_payloadLength; j++) {
Bartosz Stebel	31:413ba83b8c0b	1787	char c = _payloadPointer[j];
Bartosz Stebel	31:413ba83b8c0b	1788	if((c>='!'&&c<='~')\|\|c==' ') {
Bartosz Stebel	31:413ba83b8c0b	1789	INFOX("%c",c);
Bartosz Stebel	31:413ba83b8c0b	1790	} else {
Bartosz Stebel	31:413ba83b8c0b	1791	INFOX("\\%.2x",c);
Bartosz Stebel	31:413ba83b8c0b	1792	}
Bartosz Stebel	31:413ba83b8c0b	1793	}
Bartosz Stebel	31:413ba83b8c0b	1794	INFO("\"\r\n");
Bartosz Stebel	31:413ba83b8c0b	1795	}
Bartosz Stebel	31:413ba83b8c0b	1796	INFOX("__________________\r\n");
Bartosz Stebel	31:413ba83b8c0b	1797	}
Bartosz Stebel	31:413ba83b8c0b	1798
Bartosz Stebel	31:413ba83b8c0b	1799	/// Prints the PDU as a c array (useful for debugging or hardcoding PDUs)
Bartosz Stebel	31:413ba83b8c0b	1800	void CoapPDU::printPDUAsCArray() {
Bartosz Stebel	31:413ba83b8c0b	1801	printf("const uint8_t array[] = {\r\n ");
Bartosz Stebel	31:413ba83b8c0b	1802	for(int i=0; i<_pduLength; i++) {
Bartosz Stebel	31:413ba83b8c0b	1803	printf("0x%.2x, ",_pdu[i]);
Bartosz Stebel	31:413ba83b8c0b	1804	}
Bartosz Stebel	31:413ba83b8c0b	1805	printf("\r\n};\r\n");
Bartosz Stebel	31:413ba83b8c0b	1806	}
Bartosz Stebel	31:413ba83b8c0b	1807
Bartosz Stebel	31:413ba83b8c0b	1808	/// A routine for printing an option in human-readable format.
Bartosz Stebel	31:413ba83b8c0b	1809	/**
Bartosz Stebel	31:413ba83b8c0b	1810	* \param option This is a pointer to where the option begins in the PDU.
Bartosz Stebel	31:413ba83b8c0b	1811	*/
Bartosz Stebel	31:413ba83b8c0b	1812	void CoapPDU::printOptionHuman(uint8_t *option) {
Bartosz Stebel	31:413ba83b8c0b	1813	// compute some useful stuff
Bartosz Stebel	31:413ba83b8c0b	1814	uint16_t optionDelta = getOptionDelta(option);
Bartosz Stebel	31:413ba83b8c0b	1815	uint16_t optionValueLength = getOptionValueLength(option);
Bartosz Stebel	31:413ba83b8c0b	1816	int extraDeltaBytes = computeExtraBytes(optionDelta);
Bartosz Stebel	31:413ba83b8c0b	1817	int extraValueLengthBytes = computeExtraBytes(optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1818	int totalLength = 1+extraDeltaBytes+extraValueLengthBytes+optionValueLength;
Bartosz Stebel	31:413ba83b8c0b	1819
Bartosz Stebel	31:413ba83b8c0b	1820	if(totalLength>_pduLength) {
Bartosz Stebel	31:413ba83b8c0b	1821	totalLength = &_pdu[_pduLength-1]-option;
Bartosz Stebel	31:413ba83b8c0b	1822	DBG("New length: %u",totalLength);
Bartosz Stebel	31:413ba83b8c0b	1823	}
Bartosz Stebel	31:413ba83b8c0b	1824
Bartosz Stebel	31:413ba83b8c0b	1825	// print summary
Bartosz Stebel	31:413ba83b8c0b	1826	DBG("~~~~~~ Option ~~~~~~");
Bartosz Stebel	31:413ba83b8c0b	1827	DBG("Delta: %u, Value length: %u",optionDelta,optionValueLength);
Bartosz Stebel	31:413ba83b8c0b	1828
Bartosz Stebel	31:413ba83b8c0b	1829	// print all bytes
Bartosz Stebel	31:413ba83b8c0b	1830	DBG("All bytes (%d):",totalLength);
Bartosz Stebel	31:413ba83b8c0b	1831	for(int i=0; i<totalLength; i++) {
Bartosz Stebel	31:413ba83b8c0b	1832	if(i%4==0) {
Bartosz Stebel	31:413ba83b8c0b	1833	DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1834	DBGX(" %.2d ",i);
Bartosz Stebel	31:413ba83b8c0b	1835	}
Bartosz Stebel	31:413ba83b8c0b	1836	CoapPDU::printBinary(option[i]); DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1837	}
Bartosz Stebel	31:413ba83b8c0b	1838	DBG(" "); DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1839
Bartosz Stebel	31:413ba83b8c0b	1840	// print header byte
Bartosz Stebel	31:413ba83b8c0b	1841	DBG("Header byte:");
Bartosz Stebel	31:413ba83b8c0b	1842	DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1843	CoapPDU::printBinary(*option++);
Bartosz Stebel	31:413ba83b8c0b	1844	DBG(" "); DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1845
Bartosz Stebel	31:413ba83b8c0b	1846	// print extended delta bytes
Bartosz Stebel	31:413ba83b8c0b	1847	if(extraDeltaBytes) {
Bartosz Stebel	31:413ba83b8c0b	1848	DBG("Extended delta bytes (%d) in network order: ",extraDeltaBytes);
Bartosz Stebel	31:413ba83b8c0b	1849	DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1850	while(extraDeltaBytes--) {
Bartosz Stebel	31:413ba83b8c0b	1851	CoapPDU::printBinary(*option++); DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1852	}
Bartosz Stebel	31:413ba83b8c0b	1853	} else {
Bartosz Stebel	31:413ba83b8c0b	1854	DBG("No extended delta bytes");
Bartosz Stebel	31:413ba83b8c0b	1855	}
Bartosz Stebel	31:413ba83b8c0b	1856	DBG(" "); DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1857
Bartosz Stebel	31:413ba83b8c0b	1858	// print extended value length bytes
Bartosz Stebel	31:413ba83b8c0b	1859	if(extraValueLengthBytes) {
Bartosz Stebel	31:413ba83b8c0b	1860	DBG("Extended value length bytes (%d) in network order: ",extraValueLengthBytes);
Bartosz Stebel	31:413ba83b8c0b	1861	DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1862	while(extraValueLengthBytes--) {
Bartosz Stebel	31:413ba83b8c0b	1863	CoapPDU::printBinary(*option++); DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1864	}
Bartosz Stebel	31:413ba83b8c0b	1865	} else {
Bartosz Stebel	31:413ba83b8c0b	1866	DBG("No extended value length bytes");
Bartosz Stebel	31:413ba83b8c0b	1867	}
Bartosz Stebel	31:413ba83b8c0b	1868	DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1869
Bartosz Stebel	31:413ba83b8c0b	1870	// print option value
Bartosz Stebel	31:413ba83b8c0b	1871	DBG("Option value bytes:");
Bartosz Stebel	31:413ba83b8c0b	1872	for(int i=0; i<optionValueLength; i++) {
Bartosz Stebel	31:413ba83b8c0b	1873	if(i%4==0) {
Bartosz Stebel	31:413ba83b8c0b	1874	DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1875	DBGX(" %.2d ",i);
Bartosz Stebel	31:413ba83b8c0b	1876	}
Bartosz Stebel	31:413ba83b8c0b	1877	CoapPDU::printBinary(*option++);
Bartosz Stebel	31:413ba83b8c0b	1878	DBGX(" ");
Bartosz Stebel	31:413ba83b8c0b	1879	}
Bartosz Stebel	31:413ba83b8c0b	1880	DBG(" ");
Bartosz Stebel	31:413ba83b8c0b	1881	}
Bartosz Stebel	31:413ba83b8c0b	1882
Bartosz Stebel	31:413ba83b8c0b	1883	/// Dumps the PDU header in hex.
Bartosz Stebel	31:413ba83b8c0b	1884	void CoapPDU::printHex() {
Bartosz Stebel	31:413ba83b8c0b	1885	printf("Hexdump dump of PDU\r\n");
Bartosz Stebel	31:413ba83b8c0b	1886	printf("%.2x %.2x %.2x %.2x",_pdu[0],_pdu[1],_pdu[2],_pdu[3]);
Bartosz Stebel	31:413ba83b8c0b	1887	}
Bartosz Stebel	31:413ba83b8c0b	1888
Bartosz Stebel	31:413ba83b8c0b	1889	/// Dumps the entire PDU in binary.
Bartosz Stebel	31:413ba83b8c0b	1890	void CoapPDU::printBin() {
Bartosz Stebel	31:413ba83b8c0b	1891	for(int i=0; i<_pduLength; i++) {
Bartosz Stebel	31:413ba83b8c0b	1892	if(i%4==0) {
Bartosz Stebel	31:413ba83b8c0b	1893	printf("\r\n");
Bartosz Stebel	31:413ba83b8c0b	1894	printf("%.2d ",i);
Bartosz Stebel	31:413ba83b8c0b	1895	}
Bartosz Stebel	31:413ba83b8c0b	1896	CoapPDU::printBinary(_pdu[i]); printf(" ");
Bartosz Stebel	31:413ba83b8c0b	1897	}
Bartosz Stebel	31:413ba83b8c0b	1898	printf("\r\n");
Bartosz Stebel	31:413ba83b8c0b	1899	}
Bartosz Stebel	31:413ba83b8c0b	1900
Bartosz Stebel	31:413ba83b8c0b	1901	/// Prints a single byte in binary.
Bartosz Stebel	31:413ba83b8c0b	1902	void CoapPDU::printBinary(uint8_t b) {
Bartosz Stebel	31:413ba83b8c0b	1903	printf("%d%d%d%d%d%d%d%d",
Bartosz Stebel	31:413ba83b8c0b	1904	(b&0x80)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1905	(b&0x40)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1906	(b&0x20)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1907	(b&0x10)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1908	(b&0x08)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1909	(b&0x04)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1910	(b&0x02)&&0x01,
Bartosz Stebel	31:413ba83b8c0b	1911	(b&0x01)&&0x01);
Bartosz Stebel	31:413ba83b8c0b	1912	}
Bartosz Stebel	31:413ba83b8c0b	1913
Bartosz Stebel	31:413ba83b8c0b	1914	/// Dumps the PDU as a byte sequence to stdout.
Bartosz Stebel	31:413ba83b8c0b	1915	void CoapPDU::print() {
Bartosz Stebel	31:413ba83b8c0b	1916	fwrite(_pdu,1,_pduLength,stdout);
Bartosz Stebel	31:413ba83b8c0b	1917	}

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Type:	Library
Created:	05 Jan 2017
Imports:	7
Forks:	0
Commits:	69
Dependents:	0
Dependencies:	2
Followers:	6

cantcoap/cantcoap.cpp@68:e88f3fd2e9cf, 2017-01-23 (annotated)

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