Diff: sn_coap_parser.c

Revision:

0:aafd54b05111

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sn_coap_parser.c	Tue Feb 18 01:01:58 2014 +0000
@@ -0,0 +1,1051 @@
+/**
+ *\file sn_coap_parser.c
+ *
+ * \brief CoAP Header parser
+ *
+ * Functionality: Parses CoAP Header
+ *
+ *  Created on: Jun 30, 2011
+ *      Author: tero
+ *
+ * \note Supports draft-ietf-core-coap-12
+ */
+
+/* * * * * * * * * * * * * * */
+/* * * * INCLUDE FILES * * * */
+/* * * * * * * * * * * * * * */
+
+#include <stdio.h>
+#include <string.h> /* For memset() and memcpy() */
+
+#include "nsdl_types.h"
+#include "sn_nsdl.h"
+#include "sn_coap_header.h"
+#include "sn_coap_protocol.h"
+#include "sn_coap_header_internal.h"
+#include "sn_coap_protocol_internal.h"
+
+/* * * * * * * * * * * * * * * * * * * * */
+/* * * * LOCAL FUNCTION PROTOTYPES * * * */
+/* * * * * * * * * * * * * * * * * * * * */
+
+static void     sn_coap_parser_header_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr, coap_version_e *coap_version_ptr);
+static int8_t   sn_coap_parser_options_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr, uint8_t *packet_data_start_ptr, uint16_t packet_len);
+static int8_t	sn_coap_parser_options_parse_multiple_options(uint8_t **packet_data_pptr, uint16_t packet_left_len,  uint8_t **dst_pptr, uint16_t *dst_len_ptr, sn_coap_option_numbers_e option, uint16_t option_number_len);
+static int16_t 	sn_coap_parser_options_count_needed_memory_multiple_option(uint8_t *packet_data_ptr, uint16_t packet_left_len, sn_coap_option_numbers_e option, uint16_t option_number_len);
+static int8_t   sn_coap_parser_payload_parse(uint16_t packet_data_len, uint8_t *packet_data_start_ptr, uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr);
+
+/* * * * * * * * * * * * * * * * * */
+/* * * * GLOBAL DECLARATIONS * * * */
+/* * * * * * * * * * * * * * * * * */
+
+/**
+ * \fn sn_coap_hdr_s *sn_coap_parser(uint16_t packet_data_len, uint8_t *packet_data_ptr, coap_version_e *coap_version_ptr)
+ *
+ * \brief Parses CoAP message from given Packet data
+ *
+ * \param packet_data_len is length of given Packet data to be parsed to CoAP message
+ *
+ * \param *packet_data_ptr is source for Packet data to be parsed to CoAP message
+ *
+ * \param *coap_version_ptr is destination for parsed CoAP specification version
+ *
+ * \return Return value is pointer to parsed CoAP message.\n
+ *         In following failure cases NULL is returned:\n
+ *          -Failure in given pointer (= NULL)\n
+ *          -Failure in memory allocation (malloc() returns NULL)
+ */
+sn_coap_hdr_s *sn_coap_parser(uint16_t packet_data_len, uint8_t *packet_data_ptr, coap_version_e *coap_version_ptr)
+{
+    uint8_t       *data_temp_ptr                    = packet_data_ptr;
+    sn_coap_hdr_s *parsed_and_returned_coap_msg_ptr = NULL;
+
+    /* * * * Check given pointer * * * */
+    if (packet_data_ptr == NULL || packet_data_len < 4)
+        return NULL;
+
+    /* * * * Allocate memory for parsed and returned CoAP message and initialize allocated memory with with zero values  * * * */
+    parsed_and_returned_coap_msg_ptr = sn_coap_malloc(sizeof(sn_coap_hdr_s));
+
+    if (parsed_and_returned_coap_msg_ptr == NULL)
+        return NULL;
+
+    memset(parsed_and_returned_coap_msg_ptr, 0x00, sizeof(sn_coap_hdr_s));
+
+
+    /* * * * Header parsing, move pointer over the header...  * * * */
+    sn_coap_parser_header_parse(&data_temp_ptr, parsed_and_returned_coap_msg_ptr, coap_version_ptr);
+
+
+    /* * * * Options parsing, move pointer over the options... * * * */
+    if (sn_coap_parser_options_parse(&data_temp_ptr, parsed_and_returned_coap_msg_ptr, packet_data_ptr, packet_data_len) != 0)
+    {
+        /* Release memory of CoAP message */
+        sn_coap_parser_release_allocated_coap_msg_mem(parsed_and_returned_coap_msg_ptr);
+        return NULL;
+    }
+
+    /* * * * Payload parsing * * * */
+    if(sn_coap_parser_payload_parse(packet_data_len, packet_data_ptr, &data_temp_ptr, parsed_and_returned_coap_msg_ptr) == -1)
+    {
+		/* Release memory of CoAP message */
+		sn_coap_parser_release_allocated_coap_msg_mem(parsed_and_returned_coap_msg_ptr);
+		return NULL;
+    }
+    /* * * * Return parsed CoAP message  * * * * */
+    return parsed_and_returned_coap_msg_ptr;
+}
+
+/**
+ * \fn void sn_coap_parser_release_allocated_coap_msg_mem(sn_coap_hdr_s *freed_coap_msg_ptr)
+ *
+ * \brief Releases memory of given CoAP message
+ *
+ *        Note!!! Does not release Payload part
+ *
+ * \param *freed_coap_msg_ptr is pointer to released CoAP message
+ */
+
+void sn_coap_parser_release_allocated_coap_msg_mem(sn_coap_hdr_s *freed_coap_msg_ptr)
+{
+    if (freed_coap_msg_ptr != NULL)
+    {
+        if (freed_coap_msg_ptr->uri_path_ptr != NULL)
+        {
+            sn_coap_free(freed_coap_msg_ptr->uri_path_ptr);
+        }
+
+        if (freed_coap_msg_ptr->token_ptr != NULL)
+        {
+            sn_coap_free(freed_coap_msg_ptr->token_ptr);
+        }
+
+        if (freed_coap_msg_ptr->content_type_ptr != NULL)
+        {
+            sn_coap_free(freed_coap_msg_ptr->content_type_ptr);
+        }
+
+        if (freed_coap_msg_ptr->options_list_ptr != NULL)
+        {
+            if (freed_coap_msg_ptr->options_list_ptr->max_age_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->max_age_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->proxy_uri_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->proxy_uri_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->etag_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->etag_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->uri_host_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->uri_host_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->location_path_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->location_path_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->uri_port_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->uri_port_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->location_query_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->location_query_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->observe_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->observe_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->uri_query_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->uri_query_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->block2_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->block2_ptr);
+            }
+
+            if (freed_coap_msg_ptr->options_list_ptr->block1_ptr != NULL)
+            {
+                sn_coap_free(freed_coap_msg_ptr->options_list_ptr->block1_ptr);
+            }
+            if (freed_coap_msg_ptr->options_list_ptr->accept_ptr != NULL)
+             {
+                 sn_coap_free(freed_coap_msg_ptr->options_list_ptr->accept_ptr);
+             }
+
+            sn_coap_free(freed_coap_msg_ptr->options_list_ptr);
+        }
+
+        sn_coap_free(freed_coap_msg_ptr);
+    }
+}
+
+/**
+ * \fn static void sn_coap_parser_header_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr, coap_version_e *coap_version_ptr)
+ *
+ * \brief Parses CoAP message's Header part from given Packet data
+ *
+ * \param **packet_data_ptr is source for Packet data to be parsed to CoAP message
+ *
+ * \param *dst_coap_msg_ptr is destination for parsed CoAP message
+ *
+ * \param *coap_version_ptr is destination for parsed CoAP specification version
+ */
+
+static void sn_coap_parser_header_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr, coap_version_e *coap_version_ptr)
+{
+    /* Parse CoAP Version and message type*/
+    *coap_version_ptr = (coap_version_e)(**packet_data_pptr & COAP_HEADER_VERSION_MASK);
+    dst_coap_msg_ptr->msg_type = (sn_coap_msg_type_e)(**packet_data_pptr & COAP_HEADER_MSG_TYPE_MASK);
+    (*packet_data_pptr) += 1;
+
+    /* Parse Message code */
+    dst_coap_msg_ptr->msg_code = (sn_coap_msg_code_e)**packet_data_pptr;
+    (*packet_data_pptr) += 1;
+
+    /* Parse Message ID */
+    dst_coap_msg_ptr->msg_id = *(*packet_data_pptr+1);
+    dst_coap_msg_ptr->msg_id += **packet_data_pptr << COAP_HEADER_MSG_ID_MSB_SHIFT;
+    (*packet_data_pptr) += 2;
+
+}
+
+/**
+ * \fn static uint8_t sn_coap_parser_options_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr)
+ *
+ * \brief Parses CoAP message's Options part from given Packet data
+ *
+ * \param **packet_data_pptr is source of Packet data to be parsed to CoAP message
+ * \param *dst_coap_msg_ptr is destination for parsed CoAP message
+ *
+ * \return Return value is 0 in ok case and -1 in failure case
+ */
+
+static int8_t sn_coap_parser_options_parse(uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr, uint8_t *packet_data_start_ptr, uint16_t packet_len)
+{
+    uint8_t previous_option_number = 0;
+    uint8_t i                      = 0;
+    int8_t  ret_status             = 0;
+    uint16_t message_left 		   = 0;
+
+
+    /*  Parse token, if exists  */
+    dst_coap_msg_ptr->token_len = *packet_data_start_ptr & COAP_HEADER_TOKEN_LENGTH_MASK;
+
+    if(dst_coap_msg_ptr->token_len)
+    {
+    	if((dst_coap_msg_ptr->token_len > 8) || dst_coap_msg_ptr->token_ptr)
+    		return -1;
+
+    	dst_coap_msg_ptr->token_ptr = sn_coap_malloc(dst_coap_msg_ptr->token_len);
+
+    	if (dst_coap_msg_ptr->token_ptr == NULL)
+    	{
+    		return -1;
+    	}
+
+    	memcpy(dst_coap_msg_ptr->token_ptr, *packet_data_pptr, dst_coap_msg_ptr->token_len);
+    	(*packet_data_pptr) += dst_coap_msg_ptr->token_len;
+    }
+
+    message_left = packet_len - ((*packet_data_pptr) - packet_data_start_ptr);
+
+    /* Loop all Options */
+    while((**packet_data_pptr != 0xff) && message_left)
+    {
+
+    	/* Get option length WITHOUT extensions */
+    	uint16_t option_len = (**packet_data_pptr & 0x0F);
+
+    	/* Option number length 15 is reserved for the future use - ERROR */
+    	if(option_len == 15)
+    		return -1;
+
+    	/* Resolve option delta */
+        uint16_t  option_number = (**packet_data_pptr >> COAP_OPTIONS_OPTION_NUMBER_SHIFT);
+
+        if(option_number == 13)
+        {
+        	option_number = *(*packet_data_pptr+1) + 13;
+        	(*packet_data_pptr)++;
+        }
+        else if(option_number == 14)
+        {
+        	option_number = *(*packet_data_pptr+2);
+        	option_number += (*(*packet_data_pptr+1) << 8) + 269;
+        	(*packet_data_pptr) += 2;
+        }
+        /* Option number 15 reserved for payload marker. This is handled as a error! */
+        else if(option_number == 15)
+        	return -1;
+        
+        /* Add previous option to option delta and get option number */
+        option_number += previous_option_number;
+
+        /* Add possible option length extension to resolve full length of the option */
+        if(option_len == 13)
+        {
+        	option_len = *(*packet_data_pptr+1) + 13;
+        	(*packet_data_pptr)++;
+        }
+        else if(option_len == 14)
+        {
+        	option_len = *(*packet_data_pptr+2);
+        	option_len += (*(*packet_data_pptr+1) << 8) + 269;
+        	(*packet_data_pptr) += 2;
+        }
+
+
+        /* * * Parse option itself * * */
+        /* Some options are handled independently in own functions */
+        previous_option_number = option_number;
+
+        /* Allocate options_list_ptr if needed */
+        switch (option_number)
+        {
+            case COAP_OPTION_MAX_AGE:
+            case COAP_OPTION_PROXY_URI:
+            case COAP_OPTION_ETAG:
+            case COAP_OPTION_URI_HOST:
+            case COAP_OPTION_LOCATION_PATH:
+            case COAP_OPTION_URI_PORT:
+            case COAP_OPTION_LOCATION_QUERY:
+            case COAP_OPTION_OBSERVE:
+            case COAP_OPTION_URI_QUERY:
+            case COAP_OPTION_BLOCK2:
+            case COAP_OPTION_BLOCK1:
+            case COAP_OPTION_ACCEPT:
+            if (dst_coap_msg_ptr->options_list_ptr == NULL)
+                {
+                    dst_coap_msg_ptr->options_list_ptr = sn_coap_malloc(sizeof(sn_coap_options_list_s));
+                    if(NULL == dst_coap_msg_ptr->options_list_ptr)
+                    {
+                    	return -1;
+                    }
+                	memset(dst_coap_msg_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
+                }
+                break;
+        }
+
+        /* Parse option */
+        switch (option_number)
+        {
+            case COAP_OPTION_CONTENT_FORMAT:
+            	if((option_len > 2) || (dst_coap_msg_ptr->content_type_ptr))
+            		return -1;
+                dst_coap_msg_ptr->content_type_len = option_len;
+                (*packet_data_pptr)++;
+
+                if(option_len)
+                {
+                	dst_coap_msg_ptr->content_type_ptr = sn_coap_malloc(option_len);
+
+                	if (dst_coap_msg_ptr->content_type_ptr == NULL)
+                	{
+                    	return -1;
+                	}
+
+                	memcpy(dst_coap_msg_ptr->content_type_ptr, *packet_data_pptr, option_len);
+                    (*packet_data_pptr) += option_len;
+                }
+                break;
+
+            case COAP_OPTION_MAX_AGE:
+            	if((option_len > 4) || dst_coap_msg_ptr->options_list_ptr->max_age_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->max_age_len = option_len;
+                (*packet_data_pptr)++;
+
+                if(option_len)
+                {
+                	dst_coap_msg_ptr->options_list_ptr->max_age_ptr = sn_coap_malloc(option_len);
+
+                	if (dst_coap_msg_ptr->options_list_ptr->max_age_ptr == NULL)
+                	{
+                		return -1;
+                	}
+
+                	memcpy(dst_coap_msg_ptr->options_list_ptr->max_age_ptr, *packet_data_pptr, option_len);
+                    (*packet_data_pptr) += option_len;
+                }
+                break;
+
+            case COAP_OPTION_PROXY_URI:
+            	if ((option_len > 1034) || (option_len < 1) || dst_coap_msg_ptr->options_list_ptr->proxy_uri_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->proxy_uri_len = option_len;
+                (*packet_data_pptr)++;
+
+                dst_coap_msg_ptr->options_list_ptr->proxy_uri_ptr = sn_coap_malloc(option_len);
+
+                if (dst_coap_msg_ptr->options_list_ptr->proxy_uri_ptr == NULL)
+                {
+                    return -1;
+                }
+                memcpy(dst_coap_msg_ptr->options_list_ptr->proxy_uri_ptr, *packet_data_pptr, option_len);
+                (*packet_data_pptr) += option_len;
+
+                break;
+
+            case COAP_OPTION_ETAG:
+            	if(dst_coap_msg_ptr->options_list_ptr->etag_ptr)
+            		return -1;
+                /* This is managed independently because User gives this option in one character table */
+
+            	ret_status = sn_coap_parser_options_parse_multiple_options	(packet_data_pptr,
+            															message_left,
+            															&dst_coap_msg_ptr->options_list_ptr->etag_ptr,
+            															(uint16_t*)&dst_coap_msg_ptr->options_list_ptr->etag_len,
+            															COAP_OPTION_LOCATION_PATH, option_len);
+                if (ret_status >= 0)
+                {
+                    i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+                }
+                else
+                {
+                    return -1;
+                }
+                break;
+
+            case COAP_OPTION_URI_HOST:
+            	if((option_len > 255) || (option_len < 1) || dst_coap_msg_ptr->options_list_ptr->uri_host_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->uri_host_len = option_len;
+                (*packet_data_pptr)++;
+
+                dst_coap_msg_ptr->options_list_ptr->uri_host_ptr = sn_coap_malloc(option_len);
+
+                if (dst_coap_msg_ptr->options_list_ptr->uri_host_ptr == NULL)
+                {
+                    return -1;
+                }
+                memcpy(dst_coap_msg_ptr->options_list_ptr->uri_host_ptr, *packet_data_pptr, option_len);
+                (*packet_data_pptr) += option_len;
+
+                break;
+
+            case COAP_OPTION_LOCATION_PATH:
+            	if(dst_coap_msg_ptr->options_list_ptr->location_path_ptr)
+            		return -1;
+                /* This is managed independently because User gives this option in one character table */
+            	ret_status = sn_coap_parser_options_parse_multiple_options(packet_data_pptr, message_left,
+            	                                                                   &dst_coap_msg_ptr->options_list_ptr->location_path_ptr, &dst_coap_msg_ptr->options_list_ptr->location_path_len,
+            	                                                                   COAP_OPTION_LOCATION_PATH, option_len);
+                if (ret_status >= 0)
+                {
+                    i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+                }
+                else
+                {
+                    return -1;
+                }
+
+                break;
+
+
+            case COAP_OPTION_URI_PORT:
+            	if((option_len > 2) || dst_coap_msg_ptr->options_list_ptr->uri_port_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->uri_port_len = option_len;
+                (*packet_data_pptr)++;
+
+                if(option_len)
+                {
+					dst_coap_msg_ptr->options_list_ptr->uri_port_ptr = sn_coap_malloc(option_len);
+
+					if (dst_coap_msg_ptr->options_list_ptr->uri_port_ptr == NULL)
+					{
+						return -1;
+					}
+					memcpy(dst_coap_msg_ptr->options_list_ptr->uri_port_ptr, *packet_data_pptr, option_len);
+		            (*packet_data_pptr) += option_len;
+                }
+                break;
+
+            case COAP_OPTION_LOCATION_QUERY:
+            	if(dst_coap_msg_ptr->options_list_ptr->location_query_ptr)
+            		return -1;
+            	ret_status = sn_coap_parser_options_parse_multiple_options(packet_data_pptr, message_left,
+            	                                                                   &dst_coap_msg_ptr->options_list_ptr->location_query_ptr, &dst_coap_msg_ptr->options_list_ptr->location_query_len,
+            	                                                                   COAP_OPTION_LOCATION_QUERY, option_len);
+                if (ret_status >= 0)
+                {
+                    i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+                }
+                else
+                {
+                    return -1;
+                }
+
+                break;
+
+            case COAP_OPTION_URI_PATH:
+            	if(dst_coap_msg_ptr->uri_path_ptr)
+            		return -1;
+            	ret_status = sn_coap_parser_options_parse_multiple_options(packet_data_pptr, message_left,
+            	                                                                   &dst_coap_msg_ptr->uri_path_ptr, &dst_coap_msg_ptr->uri_path_len,
+            	                                                                   COAP_OPTION_URI_PATH, option_len);
+                if (ret_status >= 0)
+                {
+                    i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+                }
+                else
+                {
+                    return -1;
+                }
+
+                break;
+
+            case COAP_OPTION_OBSERVE:
+            	if((option_len > 2) || dst_coap_msg_ptr->options_list_ptr->observe_ptr)
+            		return -1;
+
+            	dst_coap_msg_ptr->options_list_ptr->observe = 1;
+                (*packet_data_pptr)++;
+
+            	if(option_len)
+            	{
+
+					dst_coap_msg_ptr->options_list_ptr->observe_len = option_len;
+
+					dst_coap_msg_ptr->options_list_ptr->observe_ptr = sn_coap_malloc(option_len);
+
+					if (dst_coap_msg_ptr->options_list_ptr->observe_ptr == NULL)
+					{
+						return -1;
+					}
+
+					memcpy(dst_coap_msg_ptr->options_list_ptr->observe_ptr, *packet_data_pptr, option_len);
+		            (*packet_data_pptr) += option_len;
+            	}
+
+                break;
+
+            case COAP_OPTION_URI_QUERY:
+            	if(dst_coap_msg_ptr->options_list_ptr->uri_query_ptr)
+            		return -1;
+            	ret_status = sn_coap_parser_options_parse_multiple_options(packet_data_pptr, message_left,
+            	                                                                   &dst_coap_msg_ptr->options_list_ptr->uri_query_ptr, &dst_coap_msg_ptr->options_list_ptr->uri_query_len,
+            	                                                                   COAP_OPTION_URI_QUERY, option_len);
+				if (ret_status >= 0)
+				{
+					i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+				}
+				else
+				{
+					return -1;
+				}
+
+				break;
+
+            case COAP_OPTION_BLOCK2:
+            	if((option_len > 4) || dst_coap_msg_ptr->options_list_ptr->block2_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->block2_len = option_len;
+                (*packet_data_pptr)++;
+
+                dst_coap_msg_ptr->options_list_ptr->block2_ptr = sn_coap_malloc(option_len);
+
+                if (dst_coap_msg_ptr->options_list_ptr->block2_ptr == NULL)
+                {
+                    return -1;
+                }
+
+                memcpy(dst_coap_msg_ptr->options_list_ptr->block2_ptr, *packet_data_pptr, option_len);
+	            (*packet_data_pptr) += option_len;
+
+                break;
+
+            case COAP_OPTION_BLOCK1:
+            	if((option_len > 4) || dst_coap_msg_ptr->options_list_ptr->block1_ptr)
+            		return -1;
+                dst_coap_msg_ptr->options_list_ptr->block1_len = option_len;
+                (*packet_data_pptr)++;
+
+                dst_coap_msg_ptr->options_list_ptr->block1_ptr = sn_coap_malloc(option_len);
+
+                if (dst_coap_msg_ptr->options_list_ptr->block1_ptr == NULL)
+                {
+                    return -1;
+                }
+
+                memcpy(dst_coap_msg_ptr->options_list_ptr->block1_ptr, *packet_data_pptr, option_len);
+	            (*packet_data_pptr) += option_len;
+
+                break;
+
+            case COAP_OPTION_ACCEPT:
+            	if(dst_coap_msg_ptr->options_list_ptr->accept_ptr)
+            		return -1;
+            	ret_status = sn_coap_parser_options_parse_multiple_options(packet_data_pptr, message_left,
+            	                                                                   &dst_coap_msg_ptr->options_list_ptr->accept_ptr, (uint16_t *)&dst_coap_msg_ptr->options_list_ptr->accept_len,
+            	                                                                   COAP_OPTION_ACCEPT, option_len);
+				if (ret_status >= 0)
+				{
+					i += (ret_status - 1); /* i += is because possible several Options are handled by sn_coap_parser_options_parse_multiple_options() */
+				}
+				else
+				{
+					return -1;
+				}
+
+				break;
+
+            default:
+            	return -1;
+        }
+
+                /* Check for overflow */
+        if((*packet_data_pptr - packet_data_start_ptr) > packet_len)
+        	return -1;
+
+        message_left = packet_len - (*packet_data_pptr - packet_data_start_ptr);	//todo: if(*packet_data_pptr < packet_data_start_ptr) message_left = 0; else
+
+
+    }
+
+    return 0;
+}
+
+
+/**
+ * \fn static int8_t sn_coap_parser_options_parse_multiple_options(uint8_t **packet_data_pptr, uint8_t options_count_left, uint8_t *previous_option_number_ptr, uint8_t **dst_pptr,
+ * 																	uint16_t *dst_len_ptr, sn_coap_option_numbers_e option, uint16_t option_number_len)
+ *
+ * \brief Parses CoAP message's Uri-query options
+ *
+ * \param **packet_data_pptr is source for Packet data to be parsed to CoAP message
+ *
+ * \param *dst_coap_msg_ptr is destination for parsed CoAP message
+ *
+ * \param options_count_left tells how many options are unhandled in Packet data
+ *
+ * \param *previous_option_number_ptr is pointer to used and returned previous Option number
+ *
+ * \return Return value is count of Uri-query optios parsed. In failure case -1 is returned.
+*/
+
+static int8_t sn_coap_parser_options_parse_multiple_options(uint8_t **packet_data_pptr, uint16_t packet_left_len,  uint8_t **dst_pptr, uint16_t *dst_len_ptr, sn_coap_option_numbers_e option, uint16_t option_number_len)
+{
+    int16_t     uri_query_needed_heap       = sn_coap_parser_options_count_needed_memory_multiple_option(*packet_data_pptr, packet_left_len, option, option_number_len);
+    uint8_t    *temp_parsed_uri_query_ptr   = NULL;
+    uint8_t     returned_option_counter     = 0;
+
+    if(uri_query_needed_heap == -1)
+    	return -1;
+
+    if(uri_query_needed_heap)
+    {
+    	*dst_pptr = (uint8_t*) sn_coap_malloc(uri_query_needed_heap);
+
+    	if (*dst_pptr == NULL)
+    		return -1;
+    }
+
+    *dst_len_ptr = uri_query_needed_heap;
+
+   	temp_parsed_uri_query_ptr = *dst_pptr;
+
+    /* Loop all Uri-Query options */
+    while ((temp_parsed_uri_query_ptr - *dst_pptr) < uri_query_needed_heap)
+    {
+        /* Check if this is first Uri-Query option */
+        if (returned_option_counter > 0)
+        {
+            /* Uri-Query is modified to following format: temp1'\0'temp2'\0'temp3 i.e.  */
+            /* Uri-Path is modified to following format: temp1\temp2\temp3 i.e.  */
+        	if(option == COAP_OPTION_URI_QUERY || option == COAP_OPTION_LOCATION_QUERY || option == COAP_OPTION_ETAG || option == COAP_OPTION_ACCEPT)
+            	memset(temp_parsed_uri_query_ptr, '&', 1);
+            else if(option == COAP_OPTION_URI_PATH || option == COAP_OPTION_LOCATION_PATH)
+            	memset(temp_parsed_uri_query_ptr, '/', 1);
+
+            temp_parsed_uri_query_ptr++;
+        }
+
+        returned_option_counter++;
+
+        (*packet_data_pptr)++;
+
+        if(((temp_parsed_uri_query_ptr - *dst_pptr) + option_number_len) > uri_query_needed_heap)
+        	return -1;
+
+        memcpy(temp_parsed_uri_query_ptr, *packet_data_pptr, option_number_len);
+
+        (*packet_data_pptr) += option_number_len;
+        temp_parsed_uri_query_ptr += option_number_len;
+
+        if(((**packet_data_pptr >> COAP_OPTIONS_OPTION_NUMBER_SHIFT) != 0) || (temp_parsed_uri_query_ptr - *dst_pptr) >= uri_query_needed_heap)
+        {
+            return returned_option_counter;
+        }
+
+        option_number_len = (**packet_data_pptr & 0x0F);
+        if(option_number_len == 13)
+        {
+        	option_number_len = *(*packet_data_pptr+1) + 13;
+        	(*packet_data_pptr)++;
+        }
+        else if(option_number_len == 14)
+        {
+        	option_number_len = *(*packet_data_pptr+2);
+        	option_number_len += (*(*packet_data_pptr+1) << 8) + 269;
+        	(*packet_data_pptr) += 2;
+        }
+    }
+
+    return returned_option_counter;
+}
+
+
+
+
+/**
+ * \fn static uint16_t sn_coap_parser_options_count_needed_memory_multiple_option(uint8_t *packet_data_ptr, uint8_t options_count_left, uint8_t previous_option_number, sn_coap_option_numbers_e option, uint16_t option_number_len)
+ *
+ * \brief Counts needed memory for uri query option
+ *
+ * \param *packet_data_ptr is start of source for Packet data to be parsed to CoAP message
+ *
+ * \param options_count_left tells how many options are unhandled in Packet data
+ *
+ * \param previous_option_number is previous Option number
+ *
+ * \param sn_coap_option_numbers_e option option number to be calculated
+ *
+ * \param uint16_t option_number_len length of the first option part
+ */
+
+static int16_t sn_coap_parser_options_count_needed_memory_multiple_option(uint8_t *packet_data_ptr, uint16_t packet_left_len, sn_coap_option_numbers_e option, uint16_t option_number_len)
+{
+    uint16_t ret_value              = 0;
+    uint16_t i 						= 1;
+
+    /* Loop all Uri-Query options */
+    while (i < packet_left_len)
+    {
+        if(option == COAP_OPTION_LOCATION_PATH && option_number_len > 255)
+        	return -1;
+        if(option == COAP_OPTION_URI_PATH && option_number_len > 255)
+        	return -1;
+        if(option == COAP_OPTION_URI_QUERY && option_number_len > 255)
+        	return -1;
+        if(option == COAP_OPTION_LOCATION_QUERY && option_number_len > 255)
+        	return -1;
+        if(option == COAP_OPTION_ACCEPT && option_number_len > 2)
+        	return -1;
+        if(option == COAP_OPTION_ETAG && option_number_len > 8)
+        	return -1;
+
+        i += option_number_len;
+        ret_value += option_number_len + 1; /* + 1 is for separator */
+
+        if((*(packet_data_ptr + i) >> COAP_OPTIONS_OPTION_NUMBER_SHIFT) != 0)
+        {
+            if(ret_value != 0)
+            	return (ret_value - 1); /* -1 because last Part path does not include separator */
+            else
+            	return 0;
+        }
+
+        option_number_len = (*(packet_data_ptr + i) & 0x0F);
+
+		if (option_number_len == 13)
+		{
+			i++;
+			option_number_len = *(packet_data_ptr + i) + 13;
+		}
+		else if (option_number_len == 14)
+		{
+			option_number_len = *(packet_data_ptr + 2);
+			option_number_len += (*(packet_data_ptr + 1) << 8) + 269;
+			i += 2;
+		}
+		else if (option_number_len == 15)
+			return -1;
+		i++;
+
+    }
+
+    if(ret_value != 0)
+    	return (ret_value - 1); /* -1 because last Part path does not include separator */
+    else
+    	return 0;
+}
+
+/**
+ * \fn static void sn_coap_parser_payload_parse(uint16_t packet_data_len, uint8_t *packet_data_ptr, uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr)
+ *
+ * \brief Parses CoAP message's Payload part from given Packet data
+ *
+ * \param packet_data_len is length of given Packet data to be parsed to CoAP message
+ *
+ * \param *packet_data_ptr is start of source for Packet data to be parsed to CoAP message
+ *
+ * \param **packet_data_pptr is source for Packet data to be parsed to CoAP message
+ *
+ * \param *dst_coap_msg_ptr is destination for parsed CoAP message
+ *****************************************************************************/
+
+static int8_t sn_coap_parser_payload_parse(uint16_t packet_data_len, uint8_t *packet_data_start_ptr, uint8_t **packet_data_pptr, sn_coap_hdr_s *dst_coap_msg_ptr)
+{
+    /* If there is payload */
+	if((*packet_data_pptr - packet_data_start_ptr) < packet_data_len)
+	{
+		if(**packet_data_pptr == 0xff)
+		{
+			(*packet_data_pptr)++;
+			/* Parse Payload length */
+			dst_coap_msg_ptr->payload_len = packet_data_len - (*packet_data_pptr - packet_data_start_ptr);
+
+			/* The presence of a marker followed by a zero-length payload MUST be processed as a message format error */
+			if(dst_coap_msg_ptr->payload_len == 0)
+				return -1;
+
+			/* Parse Payload by setting CoAP message's payload_ptr to point Payload in Packet data */
+			dst_coap_msg_ptr->payload_ptr = *packet_data_pptr;
+		}
+		/* No payload marker.. */
+		else
+			return -1;
+	}
+	return 0;
+}
+
+
+/**
+ * \fn void sn_coap_packet_debug(sn_coap_hdr_s *coap_packet_ptr)
+ *
+ * \brief Parses CoAP message and prints parts for debugging
+ *
+ * \param *coap_packet_ptr Pointer to the CoAP message to debug
+ *
+ *****************************************************************************/
+
+void sn_coap_packet_debug(sn_coap_hdr_s *coap_packet_ptr)
+{
+#ifdef HAVE_DEBUG
+	switch (coap_packet_ptr->msg_type)
+	{
+		case COAP_MSG_TYPE_CONFIRMABLE:
+            printf("con ");
+            break;
+
+		case COAP_MSG_TYPE_NON_CONFIRMABLE:
+            printf("non ");
+            break;
+
+		case COAP_MSG_TYPE_ACKNOWLEDGEMENT:
+            printf("ack ");
+            break;
+
+		case COAP_MSG_TYPE_RESET:
+            printf("rst ");
+            break;
+	}
+
+	switch (coap_packet_ptr->msg_code)
+	{
+        case COAP_MSG_CODE_EMPTY:
+            printf("NO CODE ");
+            break;
+
+        case COAP_MSG_CODE_REQUEST_GET:
+            printf("GET ");
+            break;
+
+        case COAP_MSG_CODE_REQUEST_POST:
+            printf("POST ");
+            break;
+
+        case COAP_MSG_CODE_REQUEST_PUT:
+            printf("PUT ");
+            break;
+
+        case COAP_MSG_CODE_REQUEST_DELETE:
+            printf("DELETE ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_CREATED:
+            printf("2.01 Created ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_DELETED:
+            printf("2.02 Deleted ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_VALID:
+            printf("2.03 Valid ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_CHANGED:
+            printf("2.04 Changed ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_CONTENT:
+            printf("2.05 Content ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_BAD_REQUEST:
+            printf("4.00 Bad Request ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_UNAUTHORIZED:
+            printf("4.01 Unauthorized ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_BAD_OPTION:
+            printf("4.02 Bad Option ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_FORBIDDEN:
+            printf("4.03 Forbidden ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_NOT_FOUND:
+            printf("4.04 Not Found ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED:
+            printf("4.05 Method Not Allowed ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_NOT_ACCEPTABLE:
+            printf("4.06 Response Not Acceptable");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_INCOMPLETE:
+            printf("4.08 Request Entity Incomplete ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_PRECONDITION_FAILED:
+            printf("4.12 Response Precondition Failed");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_REQUEST_ENTITY_TOO_LARGE:
+            printf("4.13 Request Entity Too Large ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_UNSUPPORTED_CONTENT_FORMAT:
+            printf("4.15 Unsupported Media Type ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_INTERNAL_SERVER_ERROR:
+            printf("5.00 Internal Server Error ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_NOT_IMPLEMENTED:
+            printf("5.01 Not Implemented ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_BAD_GATEWAY:
+            printf("5.02 Bad Gateway ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_SERVICE_UNAVAILABLE:
+            printf("5.03 Service Unavailable ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_GATEWAY_TIMEOUT:
+            printf("5.04 Gateway Timeout ");
+            break;
+
+        case COAP_MSG_CODE_RESPONSE_PROXYING_NOT_SUPPORTED:
+            printf("5.05 Proxying Not Supported ");
+            break;
+
+        default:
+            printf("UNKNOWN CODE ");
+            break;
+    }
+
+    printf("mid=%i ", (int)(coap_packet_ptr->msg_id));
+
+	if (coap_packet_ptr->uri_path_ptr)
+	{
+		int i;
+		printf("/");
+		for (i=0; i < coap_packet_ptr->uri_path_len; i++) printf("%c", (char)(coap_packet_ptr->uri_path_ptr[i]));
+		if (coap_packet_ptr->options_list_ptr && coap_packet_ptr->options_list_ptr->uri_query_ptr)
+		{
+			printf("?");
+			for (i=0; i < coap_packet_ptr->options_list_ptr->uri_query_len; i++) printf("%c", (char)(coap_packet_ptr->options_list_ptr->uri_query_ptr[i]));
+		}
+		printf(" ");
+    }
+
+	if (coap_packet_ptr->token_ptr)
+	{
+		int i;
+		printf("token=0x");
+		for (i=0; i < coap_packet_ptr->token_len; i++) printf("%02x", (unsigned char)(coap_packet_ptr->token_ptr[i]));
+		printf(" ");
+	}
+
+    if (coap_packet_ptr->content_type_ptr)
+    {
+    	switch (coap_packet_ptr->content_type_ptr[0])
+    	{
+        	case COAP_CT_TEXT_PLAIN:
+        		printf("text/plain ");
+        		break;
+
+        	case COAP_CT_LINK_FORMAT:
+        		printf("application/link-format ");
+        		break;
+
+        	case COAP_CT_XML:
+        		printf("application/xml ");
+        		break;
+
+        	case COAP_CT_OCTET_STREAM:
+        		printf("application/octet-stream ");
+        		break;
+
+        	case COAP_CT_EXI:
+        	    printf("application/exi ");
+        	    break;
+
+        	case COAP_CT_JSON:
+        	     printf("application/json ");
+        	     break;
+        default:
+        	printf("uknown type (%i) ", (int)(coap_packet_ptr->content_type_ptr[0]));
+        	break;
+
+    	}
+    }
+
+	if (coap_packet_ptr->options_list_ptr && coap_packet_ptr->options_list_ptr->location_path_ptr)
+	{
+		printf("Location: /");
+		int i;
+		for (i=0; i < coap_packet_ptr->options_list_ptr->location_path_len; i++) printf("%c", (char)(coap_packet_ptr->options_list_ptr->location_path_ptr[i]));
+		printf(" ");
+	}
+
+    if (coap_packet_ptr->payload_ptr)
+    {
+		int i;
+		printf("'");
+		for (i=0; i < coap_packet_ptr->payload_len; i++)
+			printf("%c", *(coap_packet_ptr->payload_ptr + i));
+		printf("' ");
+    }
+
+	printf("\n");
+#endif
+}
+