18#if defined(HAVE_LIMITS_H)
25#ifdef HAVE_ARPA_INET_H
34#define min(a,b) ((a) < (b) ? (a) : (b))
38#define max(a,b) ((a) > (b) ? (a) : (b))
67coap_pdu_from_pbuf(
struct pbuf *pbuf )
71 if (pbuf == NULL)
return NULL;
73 LWIP_ASSERT(
"Can only deal with contiguous PBUFs", pbuf->tot_len == pbuf->len);
74 LWIP_ASSERT(
"coap_io_do_io needs to receive an exclusive copy of the incoming pbuf", pbuf->ref == 1);
99 assert(mid >= 0 && mid <= 0xffff);
102 if (!pdu)
return NULL;
104#if defined(WITH_CONTIKI) || defined(WITH_LWIP)
114 pdu->pbuf = pbuf_alloc(PBUF_TRANSPORT, size + pdu->
max_hdr_size, PBUF_RAM);
115 if (pdu->pbuf == NULL) {
151 pbuf_free(pdu->pbuf);
153 if (pdu->
token != NULL)
164 const uint8_t *token,
177 if (drop_options == NULL) {
215#if !defined(WITH_LWIP) && !defined(WITH_CONTIKI)
223#if !defined(WITH_LWIP) && !defined(WITH_CONTIKI)
224 if (pdu->
data != NULL) {
231 if (new_hdr == NULL) {
250 while (size > new_size)
271 "coap_add_token: The token must defined first. Token ignored\n");
278 memcpy(pdu->
token, data, len);
316 memcpy(pdu->
token, data, len);
333 if (opt_iter.
number == number) {
351 opt_delta = decode_this.
delta + decode_next.
delta;
352 if (opt_delta <= 12) {
354 next_option[0] = (next_option[0] & 0x0f) + (
coap_opt_t)(opt_delta << 4);
356 else if (opt_delta <= 269 && decode_next.
delta <= 12) {
359 next_option[0] = (next_option[1] & 0x0f) + (13 << 4);
360 next_option[1] = (
coap_opt_t)(opt_delta - 13);
362 else if (opt_delta <= 269) {
364 next_option[1] = (
coap_opt_t)(opt_delta - 13);
366 else if (decode_next.
delta <= 12) {
368 if (next_option - option < 2) {
376 if (opt_iter.
number == number) {
382 assert(option != NULL);
383 assert(next_option != NULL);
384 memmove(&next_option[1], next_option,
392 next_option[0] = (next_option[2] & 0x0f) + (14 << 4);
393 next_option[1] = (
coap_opt_t)((opt_delta - 269) >> 8);
394 next_option[2] = (opt_delta - 269) & 0xff;
396 else if (decode_next.
delta <= 269) {
399 next_option[0] = (next_option[1] & 0x0f) + (14 << 4);
400 next_option[1] = (
coap_opt_t)((opt_delta - 269) >> 8);
401 next_option[2] = (opt_delta - 269) & 0xff;
404 next_option[1] = (
coap_opt_t)((opt_delta - 269) >> 8);
405 next_option[2] = (opt_delta - 269) & 0xff;
414 memmove(option, next_option, pdu->
used_size - (next_option - pdu->
token));
417 pdu->
data -= next_option - option;
453 "Option number %d is not defined as repeatable - dropped\n",
467 const uint8_t *data) {
470 uint16_t prev_number = 0;
482 if (opt_iter.
number > number) {
486 prev_number = opt_iter.
number;
488 assert(option != NULL);
495 opt_delta = opt_iter.
number - number;
496 if (opt_delta == 0) {
509 if (opt_iter.
number > number) {
514 assert(option != NULL);
516 if (decode.
delta < 13) {
518 option[0] = (option[0] & 0x0f) + (
coap_opt_t)(opt_delta << 4);
519 }
else if (decode.
delta < 269 && opt_delta < 13) {
521 option[1] = (option[0] & 0x0f) + (
coap_opt_t)(opt_delta << 4);
523 }
else if (decode.
delta < 269 && opt_delta < 269) {
526 }
else if (opt_delta < 13) {
528 option[2] = (option[0] & 0x0f) + (
coap_opt_t)(opt_delta << 4);
530 }
else if (opt_delta < 269) {
532 option[1] = (option[0] & 0x0f) + 0xd0;
537 option[1] = (
coap_opt_t)((opt_delta - 269) >> 8);
538 option[2] = (opt_delta - 269) & 0xff;
541 memmove(&option[shift], &option[shrink],
544 number - prev_number, data, len))
549 pdu->
data += shift - shrink;
555 const uint8_t *data) {
559 size_t new_length = 0;
560 size_t old_length = 0;
571 if (new_length > old_length) {
573 pdu->
used_size + new_length - old_length))
579 if (new_length != old_length)
580 memmove(&option[new_length], &option[old_length],
584 decode.
delta, data, len))
587 pdu->
used_size += new_length - old_length;
589 pdu->
data += new_length - old_length;
595 const uint8_t *data) {
605 const uint8_t *data) {
632 if (number < pdu->max_opt) {
634 "coap_add_option: options are not in correct order\n");
645 memmove (&pdu->
data[optsize-1], &pdu->
data[-1],
648 pdu->
data += optsize;
656 number - pdu->
max_opt, data, len);
677 memcpy(payload, data, len);
678 return payload != NULL;
711 size_t *offset,
size_t *total) {
724 if(pdu->
data == NULL) {
737#ifndef SHORT_ERROR_RESPONSE
797 assert(optp); assert(*optp);
802 assert(optsize <= *length);
809 *max_opt += option.
delta;
819 const uint8_t *data) {
821 size_t header_size = 0;
824 uint8_t len = *data >> 4;
851 uint8_t len = *data >> 4;
854 }
else if (length >= 2) {
857 }
else if (length >= 3) {
860 }
else if (length >= 5) {
861 size = ((size_t)data[1] << 24) + ((size_t)data[2] << 16)
866 size += data[0] & 0x0f;
881 pdu->
type = (hdr[0] >> 4) & 0x03;
884 pdu->
mid = (uint16_t)hdr[2] << 8 | hdr[3];
910 if (len > 4)
goto bad;
913 if (len > 0)
goto bad;
923 if (len > 0)
goto bad;
932 if (len < 1 || len > 255)
goto bad;
935 if (len > 3)
goto bad;
944 if (len > 2)
goto bad;
996 if (*len > prflen +1) {
1000 memcpy(*obp, prf, prflen);
1014 const uint8_t hex[] =
"0123456789abcdef";
1015 (*obp)[0] = hex[(c & 0xf0) >> 4];
1016 (*obp)[1] = hex[c & 0x0f];
1018 (*obp)[0] = isprint(c) ? c :
'.';
1031 if (pdu->
code == 0) {
1044 if (pdu->
code == 0) {
1056 const uint32_t len =
1060 "coap_pdu_parse: %d.%02d: offset %u malformed option\n",
1070 "coap_pdu_parse: %d.%02d: offset %u option %u has bad length %u\n",
1084 static char outbuf[COAP_DEBUG_BUF_SIZE];
1091 for (i = 0; i < 2; i++) {
1096 outbuflen =
sizeof(outbuf);
1102 const uint32_t len =
1117 tlen = opt - opt_last;
1119 ok = ok &&
write_char(&obp, &outbuflen, *opt_last, i);
1124 ok = ok &&
write_char(&obp, &outbuflen, *opt, i);
1138 "coap_pdu_parse: message ending in payload start marker\n");
1143 pdu->
data = (uint8_t*)opt;
1153 const uint8_t *data,
1162 if (!hdr_size || hdr_size > length)
1169 memcpy(pdu->
token - hdr_size, data, length);
1182 "coap_pdu_encode_header: not enough space for UDP-style header\n");
1189 pdu->
token[-2] = (uint8_t)(pdu->
mid >> 8);
1190 pdu->
token[-1] = (uint8_t)(pdu->
mid);
1204 "coap_pdu_encode_header: not enough space for TCP0 header\n");
1207 pdu->
token[-2] = (uint8_t)len << 4
1215 "coap_pdu_encode_header: not enough space for TCP8 header\n");
1226 "coap_pdu_encode_header: not enough space for TCP16 header\n");
1238 "coap_pdu_encode_header: not enough space for TCP32 header\n");
1262 assert(code <= 0xff);
1271 assert(type <= 0x3);
1288 assert(mid >= 0 && mid <= 0xffff);
Pulls together all the internal only header files.
size_t coap_opt_parse(const coap_opt_t *opt, size_t length, coap_option_t *result)
Parses the option pointed to by opt into result.
uint16_t coap_option_num_t
uint8_t coap_opt_t
Use byte-oriented access methods here because sliding a complex struct coap_opt_t over the data buffe...
uint16_t coap_new_message_id(coap_session_t *session)
Returns a new message id and updates session->tx_mid accordingly.
#define coap_log(level,...)
Logging function.
coap_opt_t * coap_option_next(coap_opt_iterator_t *oi)
Updates the iterator oi to point to the next option.
size_t coap_opt_encode(coap_opt_t *opt, size_t maxlen, uint16_t delta, const uint8_t *val, size_t length)
Encodes option with given delta into opt.
uint32_t coap_opt_length(const coap_opt_t *opt)
Returns the length of the given option.
coap_opt_iterator_t * coap_option_iterator_init(const coap_pdu_t *pdu, coap_opt_iterator_t *oi, const coap_opt_filter_t *filter)
Initializes the given option iterator oi to point to the beginning of the pdu's option list.
size_t coap_opt_encode_size(uint16_t delta, size_t length)
Compute storage bytes needed for an option with given delta and length.
#define COAP_OPT_ALL
Pre-defined filter that includes all options.
coap_opt_t * coap_check_option(const coap_pdu_t *pdu, coap_option_num_t number, coap_opt_iterator_t *oi)
Retrieves the first option of number number from pdu.
const uint8_t * coap_opt_value(const coap_opt_t *opt)
Returns a pointer to the value of the given option.
int coap_option_filter_get(coap_opt_filter_t *filter, coap_option_num_t option)
Checks if number is contained in filter.
#define COAP_MESSAGE_SIZE_OFFSET_TCP8
size_t coap_insert_option(coap_pdu_t *pdu, coap_option_num_t number, size_t len, const uint8_t *data)
Inserts option of given number in the pdu with the appropriate data.
int coap_remove_option(coap_pdu_t *pdu, coap_option_num_t number)
Removes (first) option of given number from the pdu.
int coap_update_token(coap_pdu_t *pdu, size_t len, const uint8_t *data)
Updates token in pdu with length len and data.
#define COAP_PDU_MAX_UDP_HEADER_SIZE
int coap_pdu_parse_header(coap_pdu_t *pdu, coap_proto_t proto)
Decode the protocol specific header for the specified PDU.
size_t coap_pdu_parse_header_size(coap_proto_t proto, const uint8_t *data)
Interprets data to determine the number of bytes in the header.
#define COAP_PDU_MAX_TCP_HEADER_SIZE
#define COAP_MAX_MESSAGE_SIZE_TCP8
#define COAP_PDU_IS_SIGNALING(pdu)
#define COAP_MAX_MESSAGE_SIZE_TCP0
#define COAP_MESSAGE_SIZE_OFFSET_TCP16
void coap_pdu_clear(coap_pdu_t *pdu, size_t size)
Clears any contents from pdu and resets used_size, and data pointers.
#define COAP_MESSAGE_SIZE_OFFSET_TCP32
int coap_pdu_parse_opt(coap_pdu_t *pdu)
Verify consistency in the given CoAP PDU structure and locate the data.
size_t coap_update_option(coap_pdu_t *pdu, coap_option_num_t number, size_t len, const uint8_t *data)
Updates existing first option of given number in the pdu with the new data.
size_t coap_pdu_encode_header(coap_pdu_t *pdu, coap_proto_t proto)
Compose the protocol specific header for the specified PDU.
#define COAP_DEFAULT_VERSION
#define COAP_PAYLOAD_START
int coap_pdu_check_resize(coap_pdu_t *pdu, size_t size)
Dynamically grows the size of pdu to new_size if needed.
size_t coap_pdu_parse_size(coap_proto_t proto, const uint8_t *data, size_t length)
Parses data to extract the message size.
int coap_pdu_resize(coap_pdu_t *pdu, size_t new_size)
Dynamically grows the size of pdu to new_size.
#define COAP_PDU_IS_REQUEST(pdu)
#define COAP_MAX_MESSAGE_SIZE_TCP16
size_t coap_add_option_internal(coap_pdu_t *pdu, coap_option_num_t number, size_t len, const uint8_t *data)
Adds option of given number to pdu that is passed as first parameter.
#define COAP_OPTION_HOP_LIMIT
#define COAP_OPTION_NORESPONSE
#define COAP_OPTION_URI_HOST
#define COAP_OPTION_IF_MATCH
coap_pdu_code_t coap_pdu_get_code(const coap_pdu_t *pdu)
Gets the PDU code associated with pdu.
#define COAP_OPTION_BLOCK2
const char * coap_response_phrase(unsigned char code)
Returns a human-readable response phrase for the specified CoAP response code.
#define COAP_OPTION_CONTENT_FORMAT
#define COAP_SIGNALING_OPTION_ALTERNATIVE_ADDRESS
#define COAP_OPTION_SIZE2
#define COAP_OPTION_BLOCK1
#define COAP_OPTION_PROXY_SCHEME
uint8_t * coap_add_data_after(coap_pdu_t *pdu, size_t len)
Adds given data to the pdu that is passed as first parameter but does not.
#define COAP_OPTION_URI_QUERY
void coap_delete_pdu(coap_pdu_t *pdu)
Dispose of an CoAP PDU and frees associated storage.
void coap_pdu_set_code(coap_pdu_t *pdu, coap_pdu_code_t code)
Sets the PDU code in the pdu.
int coap_mid_t
coap_mid_t is used to store the CoAP Message ID of a CoAP PDU.
#define COAP_OPTION_IF_NONE_MATCH
#define COAP_OPTION_LOCATION_PATH
#define COAP_OPTION_URI_PATH
#define COAP_RESPONSE_CODE(N)
coap_proto_t
CoAP protocol types.
coap_pdu_t * coap_new_pdu(coap_pdu_type_t type, coap_pdu_code_t code, coap_session_t *session)
Creates a new CoAP PDU.
coap_pdu_code_t
Set of codes available for a PDU.
#define COAP_OPTION_OSCORE
#define COAP_OPTION_SIZE1
coap_pdu_type_t
CoAP PDU message type definitions.
#define COAP_SIGNALING_OPTION_BLOCK_WISE_TRANSFER
int coap_add_token(coap_pdu_t *pdu, size_t len, const uint8_t *data)
Adds token of length len to pdu.
#define COAP_OPTION_LOCATION_QUERY
void coap_pdu_set_type(coap_pdu_t *pdu, coap_pdu_type_t type)
Sets the PDU type in the pdu.
size_t coap_add_option(coap_pdu_t *pdu, coap_option_num_t number, size_t len, const uint8_t *data)
Adds option of given number to pdu that is passed as first parameter.
#define COAP_SIGNALING_OPTION_CUSTODY
coap_pdu_signaling_proto_t
coap_pdu_type_t coap_pdu_get_type(const coap_pdu_t *pdu)
Gets the PDU type associated with pdu.
int coap_get_data(const coap_pdu_t *pdu, size_t *len, const uint8_t **data)
Retrieves the length and data pointer of specified PDU.
int coap_pdu_parse(coap_proto_t proto, const uint8_t *data, size_t length, coap_pdu_t *pdu)
Parses data into the CoAP PDU structure given in result.
#define COAP_MAX_OPT
the highest option number we know
void coap_pdu_set_mid(coap_pdu_t *pdu, coap_mid_t mid)
Sets the message id in the pdu.
coap_pdu_t * coap_pdu_duplicate(const coap_pdu_t *old_pdu, coap_session_t *session, size_t token_length, const uint8_t *token, coap_opt_filter_t *drop_options)
Duplicate an existing PDU.
#define COAP_OPTION_URI_PORT
coap_pdu_t * coap_pdu_init(coap_pdu_type_t type, coap_pdu_code_t code, coap_mid_t mid, size_t size)
Creates a new CoAP PDU with at least enough storage space for the given size maximum message size.
#define COAP_OPTION_ACCEPT
int coap_get_data_large(const coap_pdu_t *pdu, size_t *len, const uint8_t **data, size_t *offset, size_t *total)
Retrieves the data from a PDU, with support for large bodies of data that spans multiple PDUs.
coap_mid_t coap_pdu_get_mid(const coap_pdu_t *pdu)
Gets the message id associated with pdu.
#define COAP_OPTION_MAXAGE
#define COAP_OPTION_PROXY_URI
#define COAP_OPTION_OBSERVE
#define COAP_SIGNALING_OPTION_HOLD_OFF
#define COAP_SIGNALING_OPTION_BAD_CSM_OPTION
#define COAP_SIGNALING_OPTION_MAX_MESSAGE_SIZE
int coap_add_data(coap_pdu_t *pdu, size_t len, const uint8_t *data)
Adds given data to the pdu that is passed as first parameter.
coap_bin_const_t coap_pdu_get_token(const coap_pdu_t *pdu)
Gets the token associated with pdu.
size_t coap_session_max_pdu_size(const coap_session_t *session)
Get maximum acceptable PDU size.
void * coap_malloc_type(coap_memory_tag_t type, size_t size)
Allocates a chunk of size bytes and returns a pointer to the newly allocated memory.
void coap_free_type(coap_memory_tag_t type, void *p)
Releases the memory that was allocated by coap_malloc_type().
static size_t next_option_safe(coap_opt_t **optp, size_t *length, uint16_t *max_opt)
Advances *optp to next option if still in PDU.
static int write_char(char **obp, size_t *len, char c, int printable)
static int coap_pdu_parse_opt_csm(coap_pdu_t *pdu, uint16_t len)
error_desc_t coap_error[]
static int check_repeatable(coap_option_num_t number)
static int write_prefix(char **obp, size_t *len, const char *prf, size_t prflen)
static int coap_pdu_parse_opt_base(coap_pdu_t *pdu, uint16_t len)
CoAP binary data definition with const data.
size_t length
length of binary data
const uint8_t * s
read-only binary data
Iterator to run through PDU options.
coap_option_num_t number
decoded option number
Representation of CoAP options.
structure for CoAP PDUs token, if any, follows the fixed size header, then options until payload mark...
uint8_t max_hdr_size
space reserved for protocol-specific header
uint16_t max_opt
highest option number in PDU
uint8_t * token
first byte of token, if any, or options
coap_lg_xmit_t * lg_xmit
Holds ptr to lg_xmit if sending a set of blocks.
size_t body_length
Holds body data length.
size_t max_size
maximum size for token, options and payload, or zero for variable size pdu
const uint8_t * body_data
Holds ptr to re-assembled data or NULL.
size_t body_offset
Holds body data offset.
coap_pdu_code_t code
request method (value 1–31) or response code (value 64-255)
uint8_t token_length
length of Token
uint8_t hdr_size
actual size used for protocol-specific header
uint8_t * data
first byte of payload, if any
coap_mid_t mid
message id, if any, in regular host byte order
size_t used_size
used bytes of storage for token, options and payload
uint8_t crit_opt
Set if unknown critical option for proxy.
size_t alloc_size
allocated storage for token, options and payload
size_t body_total
Holds body data total size.
coap_pdu_type_t type
message type
Abstraction of virtual session that can be attached to coap_context_t (client) or coap_endpoint_t (se...