mirror of
https://github.com/obgm/libcoap.git
synced 2026-11-13 03:40:40 +03:00
Jon Shallow
47a83549a8
Add in new function coap_context_set_max_token_size() to define the maximum supported token size. Track changes to PDU to support extended tokens. Update documentation.
259 lines
9.8 KiB
C
259 lines
9.8 KiB
C
/*
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* coap_block_internal.h -- Structures, Enums & Functions that are not
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* exposed to application programming
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*
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* Copyright (C) 2010-2023 Olaf Bergmann <bergmann@tzi.org>
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* Copyright (C) 2021-2023 Jon Shallow <supjps-libcoap@jpshallow.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* This file is part of the CoAP library libcoap. Please see README for terms
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* of use.
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*/
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/**
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* @file coap_block_internal.h
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* @brief CoAP block internal information
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*/
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#ifndef COAP_BLOCK_INTERNAL_H_
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#define COAP_BLOCK_INTERNAL_H_
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#include "coap_internal.h"
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#include "coap_pdu_internal.h"
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#include "resource.h"
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/**
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* @ingroup internal_api
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* @defgroup block_internal Block Transfer
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* Internal API for Block Transfer (RC7959)
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* @{
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*/
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typedef enum {
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COAP_RECURSE_OK,
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COAP_RECURSE_NO
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} coap_recurse_t;
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struct coap_lg_range {
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uint32_t begin;
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uint32_t end;
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};
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#define COAP_RBLOCK_CNT 4
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/**
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* Structure to keep track of received blocks
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*/
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typedef struct coap_rblock_t {
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uint32_t used;
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uint32_t retry;
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struct coap_lg_range range[COAP_RBLOCK_CNT];
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coap_tick_t last_seen;
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} coap_rblock_t;
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/**
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* Structure to keep track of block1 specific information
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* (Requests)
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*/
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typedef struct coap_l_block1_t {
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coap_binary_t *app_token; /**< original PDU token */
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uint64_t state_token; /**< state token */
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size_t bert_size; /**< size of last BERT block */
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uint32_t count; /**< the number of packets sent for payload */
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} coap_l_block1_t;
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/**
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* Structure to keep track of block2 specific information
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* (Responses)
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*/
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typedef struct coap_l_block2_t {
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coap_resource_t *resource; /**< associated resource */
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coap_string_t *query; /**< Associated query for the resource */
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uint64_t etag; /**< ETag value */
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coap_pdu_code_t request_method; /**< Method used to request this data */
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uint8_t rtag_set; /**< Set if RTag is in receive PDU */
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uint8_t rtag_length; /**< RTag length */
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uint8_t rtag[8]; /**< RTag for block checking */
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coap_time_t maxage_expire; /**< When this entry expires */
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} coap_l_block2_t;
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/**
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* Structure to hold large body (many blocks) transmission information
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*/
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struct coap_lg_xmit_t {
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struct coap_lg_xmit_t *next;
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uint8_t blk_size; /**< large block transmission size */
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uint16_t option; /**< large block transmisson CoAP option */
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int last_block; /**< last acknowledged block number */
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const uint8_t *data; /**< large data ptr */
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size_t length; /**< large data length */
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size_t offset; /**< large data next offset to transmit */
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union {
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coap_l_block1_t b1;
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coap_l_block2_t b2;
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} b;
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coap_pdu_t pdu; /**< skeletal PDU */
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coap_tick_t last_payload; /**< Last time MAX_PAYLOAD was sent or 0 */
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coap_tick_t last_sent; /**< Last time any data sent */
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coap_tick_t last_all_sent; /**< Last time all data sent or 0 */
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coap_tick_t last_obs; /**< Last time used (Observe tracking) or 0 */
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coap_release_large_data_t release_func; /**< large data de-alloc function */
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void *app_ptr; /**< applicaton provided ptr for de-alloc function */
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};
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#if COAP_CLIENT_SUPPORT
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/**
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* Structure to hold large body (many blocks) client receive information
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*/
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struct coap_lg_crcv_t {
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struct coap_lg_crcv_t *next;
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uint8_t observe[3]; /**< Observe data (if observe_set) (only 24 bits) */
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uint8_t observe_length;/**< Length of observe data */
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uint8_t observe_set; /**< Set if this is an observe receive PDU */
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uint8_t szx; /**< size of individual blocks */
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uint8_t etag_set; /**< Set if ETag is in receive PDU */
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uint8_t etag_length; /**< ETag length */
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uint8_t etag[8]; /**< ETag for block checking */
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uint16_t content_format; /**< Content format for the set of blocks */
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uint8_t last_type; /**< Last request type (CON/NON) */
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uint8_t initial; /**< If set, has not been used yet */
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uint16_t block_option; /**< Block option in use */
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uint16_t retry_counter; /**< Retry counter (part of state token) */
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size_t total_len; /**< Length as indicated by SIZE2 option */
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coap_binary_t *body_data; /**< Used for re-assembling entire body */
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coap_binary_t *app_token; /**< app requesting PDU token */
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coap_bin_const_t **obs_token; /**< Tokens used in setting up Observe
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(to handle large FETCH) */
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size_t obs_token_cnt; /**< number of tokens used to set up Observe */
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uint64_t state_token; /**< state token */
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coap_pdu_t pdu; /**< skeletal PDU */
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coap_rblock_t rec_blocks; /** < list of received blocks */
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coap_tick_t last_used; /**< Last time all data sent or 0 */
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};
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#endif /* COAP_CLIENT_SUPPORT */
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#if COAP_SERVER_SUPPORT
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/**
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* Structure to hold large body (many blocks) server receive information
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*/
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struct coap_lg_srcv_t {
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struct coap_lg_srcv_t *next;
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uint8_t observe[3]; /**< Observe data (if set) (only 24 bits) */
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uint8_t observe_length;/**< Length of observe data */
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uint8_t observe_set; /**< Set if this is an observe receive PDU */
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uint8_t rtag_set; /**< Set if RTag is in receive PDU */
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uint8_t rtag_length; /**< RTag length */
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uint8_t rtag[8]; /**< RTag for block checking */
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uint16_t content_format; /**< Content format for the set of blocks */
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uint8_t last_type; /**< Last request type (CON/NON) */
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uint8_t szx; /**< size of individual blocks */
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size_t total_len; /**< Length as indicated by SIZE1 option */
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coap_binary_t *body_data; /**< Used for re-assembling entire body */
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size_t amount_so_far; /**< Amount of data seen so far */
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coap_resource_t *resource; /**< associated resource */
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coap_str_const_t *uri_path; /** set to uri_path if unknown resource */
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coap_rblock_t rec_blocks; /** < list of received blocks */
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coap_mid_t last_mid; /**< Last received mid for this set of packets */
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coap_tick_t last_used; /**< Last time data sent or 0 */
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uint16_t block_option; /**< Block option in use */
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};
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#endif /* COAP_SERVER_SUPPORT */
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#if COAP_CLIENT_SUPPORT
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coap_lg_crcv_t * coap_block_new_lg_crcv(coap_session_t *session,
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coap_pdu_t *pdu,
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coap_lg_xmit_t *lg_xmit);
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void coap_block_delete_lg_crcv(coap_session_t *session,
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coap_lg_crcv_t *lg_crcv);
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int coap_block_check_lg_crcv_timeouts(coap_session_t *session,
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coap_tick_t now,
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coap_tick_t *tim_rem);
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#endif /* COAP_CLIENT_SUPPORT */
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#if COAP_SERVER_SUPPORT
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void coap_block_delete_lg_srcv(coap_session_t *session,
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coap_lg_srcv_t *lg_srcv);
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int coap_block_check_lg_srcv_timeouts(coap_session_t *session,
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coap_tick_t now,
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coap_tick_t *tim_rem);
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int coap_handle_request_send_block(coap_session_t *session,
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coap_pdu_t *pdu,
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coap_pdu_t *response,
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coap_resource_t *resource,
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coap_string_t *query);
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int coap_handle_request_put_block(coap_context_t *context,
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coap_session_t *session,
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coap_pdu_t *pdu,
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coap_pdu_t *response,
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coap_resource_t *resource,
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coap_string_t *uri_path,
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coap_opt_t *observe,
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int *added_block,
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coap_lg_srcv_t **free_lg_srcv);
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coap_lg_xmit_t * coap_find_lg_xmit_response(const coap_session_t *session,
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const coap_pdu_t *request,
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const coap_resource_t *resource,
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const coap_string_t *query);
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#endif /* COAP_SERVER_SUPPORT */
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#if COAP_CLIENT_SUPPORT
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int coap_handle_response_send_block(coap_session_t *session, coap_pdu_t *sent,
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coap_pdu_t *rcvd);
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int coap_handle_response_get_block(coap_context_t *context,
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coap_session_t *session,
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coap_pdu_t *sent,
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coap_pdu_t *rcvd,
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coap_recurse_t recursive);
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coap_mid_t
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coap_retransmit_oscore_pdu(coap_session_t *session,
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coap_pdu_t *pdu,
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coap_opt_t *echo);
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#endif /* COAP_CLIENT_SUPPORT */
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void coap_block_delete_lg_xmit(coap_session_t *session,
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coap_lg_xmit_t *lg_xmit);
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int coap_block_check_lg_xmit_timeouts(coap_session_t *session,
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coap_tick_t now,
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coap_tick_t *tim_rem);
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/**
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* The function checks that the code in a newly formed lg_xmit created by
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* coap_add_data_large_response() is updated.
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*
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* @param session The session.
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* @param request The request PDU to to check.
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* @param response The response PDU to to update with response->code.
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* @param resource The requested resource.
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* @param query The requested query.
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*/
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void coap_check_code_lg_xmit(const coap_session_t *session,
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const coap_pdu_t *request,
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coap_pdu_t *response,
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const coap_resource_t *resource,
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const coap_string_t *query);
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#if COAP_CLIENT_SUPPORT
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/**
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* The function checks if the token needs to be updated before PDU is
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* presented to the application (only relevant to clients).
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*
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* @param session The session.
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* @param pdu The PDU to to check for updating.
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*/
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void coap_check_update_token(coap_session_t *session, coap_pdu_t *pdu);
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#else /* ! COAP_CLIENT_SUPPORT */
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#define coap_check_update_token(a,b)
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#endif /* ! COAP_CLIENT_SUPPORT */
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/** @} */
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#endif /* COAP_BLOCK_INTERNAL_H_ */
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