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Zephyr Project API
3.3.0
A Scalable Open Source RTOS
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Zephyr Project API
3.3.0
A Scalable Open Source RTOS
|
CoAP implementation for Zephyr. More...
#include <zephyr/types.h>#include <stddef.h>#include <stdbool.h>#include <zephyr/net/net_ip.h>#include <zephyr/sys/slist.h>Go to the source code of this file.
Data Structures | |
| struct | coap_resource |
| Description of CoAP resource. More... | |
| struct | coap_observer |
| Represents a remote device that is observing a local resource. More... | |
| struct | coap_packet |
| Representation of a CoAP Packet. More... | |
| struct | coap_option |
| struct | coap_pending |
| Represents a request awaiting for an acknowledgment (ACK). More... | |
| struct | coap_reply |
| Represents the handler for the reply of a request, it is also used when observing resources. More... | |
| struct | coap_block_context |
| Represents the current state of a block-wise transaction. More... | |
Macros | |
| #define | COAP_REQUEST_MASK 0x07 |
| #define | COAP_VERSION_1 1U |
| #define | coap_make_response_code(class, det) ((class << 5) | (det)) |
| #define | COAP_CODE_EMPTY (0) |
| #define | COAP_TOKEN_MAX_LEN 8UL |
| #define | GET_BLOCK_NUM(v) ((v) >> 4) |
| #define | GET_BLOCK_SIZE(v) (((v) & 0x7)) |
| #define | GET_MORE(v) (!!((v) & 0x08)) |
Typedefs | |
| typedef int(* | coap_method_t) (struct coap_resource *resource, struct coap_packet *request, struct sockaddr *addr, socklen_t addr_len) |
| Type of the callback being called when a resource's method is invoked by the remote entity. More... | |
| typedef void(* | coap_notify_t) (struct coap_resource *resource, struct coap_observer *observer) |
| Type of the callback being called when a resource's has observers to be informed when an update happens. More... | |
| typedef int(* | coap_reply_t) (const struct coap_packet *response, struct coap_reply *reply, const struct sockaddr *from) |
| Helper function to be called when a response matches the a pending request. More... | |
Functions | |
| uint8_t | coap_header_get_version (const struct coap_packet *cpkt) |
| Returns the version present in a CoAP packet. More... | |
| uint8_t | coap_header_get_type (const struct coap_packet *cpkt) |
| Returns the type of the CoAP packet. More... | |
| uint8_t | coap_header_get_token (const struct coap_packet *cpkt, uint8_t *token) |
| Returns the token (if any) in the CoAP packet. More... | |
| uint8_t | coap_header_get_code (const struct coap_packet *cpkt) |
| Returns the code of the CoAP packet. More... | |
| uint16_t | coap_header_get_id (const struct coap_packet *cpkt) |
| Returns the message id associated with the CoAP packet. More... | |
| const uint8_t * | coap_packet_get_payload (const struct coap_packet *cpkt, uint16_t *len) |
| Returns the data pointer and length of the CoAP packet. More... | |
| int | coap_packet_parse (struct coap_packet *cpkt, uint8_t *data, uint16_t len, struct coap_option *options, uint8_t opt_num) |
| Parses the CoAP packet in data, validating it and initializing cpkt. data must remain valid while cpkt is used. More... | |
| int | coap_packet_init (struct coap_packet *cpkt, uint8_t *data, uint16_t max_len, uint8_t ver, uint8_t type, uint8_t token_len, const uint8_t *token, uint8_t code, uint16_t id) |
| Creates a new CoAP Packet from input data. More... | |
| int | coap_ack_init (struct coap_packet *cpkt, const struct coap_packet *req, uint8_t *data, uint16_t max_len, uint8_t code) |
| Create a new CoAP Acknowledgment message for given request. More... | |
| uint8_t * | coap_next_token (void) |
| Returns a randomly generated array of 8 bytes, that can be used as a message's token. More... | |
| uint16_t | coap_next_id (void) |
| Helper to generate message ids. More... | |
| int | coap_find_options (const struct coap_packet *cpkt, uint16_t code, struct coap_option *options, uint16_t veclen) |
| Return the values associated with the option of value code. More... | |
| int | coap_packet_append_option (struct coap_packet *cpkt, uint16_t code, const uint8_t *value, uint16_t len) |
| Appends an option to the packet. More... | |
| unsigned int | coap_option_value_to_int (const struct coap_option *option) |
| Converts an option to its integer representation. More... | |
| int | coap_append_option_int (struct coap_packet *cpkt, uint16_t code, unsigned int val) |
| Appends an integer value option to the packet. More... | |
| int | coap_packet_append_payload_marker (struct coap_packet *cpkt) |
| Append payload marker to CoAP packet. More... | |
| int | coap_packet_append_payload (struct coap_packet *cpkt, const uint8_t *payload, uint16_t payload_len) |
| Append payload to CoAP packet. More... | |
| int | coap_handle_request (struct coap_packet *cpkt, struct coap_resource *resources, struct coap_option *options, uint8_t opt_num, struct sockaddr *addr, socklen_t addr_len) |
| When a request is received, call the appropriate methods of the matching resources. More... | |
| static uint16_t | coap_block_size_to_bytes (enum coap_block_size block_size) |
| Helper for converting the enumeration to the size expressed in bytes. More... | |
| int | coap_block_transfer_init (struct coap_block_context *ctx, enum coap_block_size block_size, size_t total_size) |
| Initializes the context of a block-wise transfer. More... | |
| int | coap_append_block1_option (struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Append BLOCK1 option to the packet. More... | |
| int | coap_append_block2_option (struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Append BLOCK2 option to the packet. More... | |
| int | coap_append_size1_option (struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Append SIZE1 option to the packet. More... | |
| int | coap_append_size2_option (struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Append SIZE2 option to the packet. More... | |
| int | coap_get_option_int (const struct coap_packet *cpkt, uint16_t code) |
| Get the integer representation of a CoAP option. More... | |
| int | coap_update_from_block (const struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Retrieves BLOCK{1,2} and SIZE{1,2} from cpkt and updates ctx accordingly. More... | |
| int | coap_next_block_for_option (const struct coap_packet *cpkt, struct coap_block_context *ctx, enum coap_option_num option) |
| Updates ctx according to option set in cpkt so after this is called the current entry indicates the correct offset in the body of data being transferred. More... | |
| size_t | coap_next_block (const struct coap_packet *cpkt, struct coap_block_context *ctx) |
| Updates ctx so after this is called the current entry indicates the correct offset in the body of data being transferred. More... | |
| void | coap_observer_init (struct coap_observer *observer, const struct coap_packet *request, const struct sockaddr *addr) |
| Indicates that the remote device referenced by addr, with request, wants to observe a resource. More... | |
| bool | coap_register_observer (struct coap_resource *resource, struct coap_observer *observer) |
| After the observer is initialized, associate the observer with an resource. More... | |
| void | coap_remove_observer (struct coap_resource *resource, struct coap_observer *observer) |
| Remove this observer from the list of registered observers of that resource. More... | |
| struct coap_observer * | coap_find_observer_by_addr (struct coap_observer *observers, size_t len, const struct sockaddr *addr) |
| Returns the observer that matches address addr. More... | |
| struct coap_observer * | coap_observer_next_unused (struct coap_observer *observers, size_t len) |
| Returns the next available observer representation. More... | |
| void | coap_reply_init (struct coap_reply *reply, const struct coap_packet *request) |
| Indicates that a reply is expected for request. More... | |
| int | coap_pending_init (struct coap_pending *pending, const struct coap_packet *request, const struct sockaddr *addr, uint8_t retries) |
| Initialize a pending request with a request. More... | |
| struct coap_pending * | coap_pending_next_unused (struct coap_pending *pendings, size_t len) |
| Returns the next available pending struct, that can be used to track the retransmission status of a request. More... | |
| struct coap_reply * | coap_reply_next_unused (struct coap_reply *replies, size_t len) |
| Returns the next available reply struct, so it can be used to track replies and notifications received. More... | |
| struct coap_pending * | coap_pending_received (const struct coap_packet *response, struct coap_pending *pendings, size_t len) |
| After a response is received, returns if there is any matching pending request exits. User has to clear all pending retransmissions related to that response by calling coap_pending_clear(). More... | |
| struct coap_reply * | coap_response_received (const struct coap_packet *response, const struct sockaddr *from, struct coap_reply *replies, size_t len) |
| After a response is received, call coap_reply_t handler registered in coap_reply structure. More... | |
| struct coap_pending * | coap_pending_next_to_expire (struct coap_pending *pendings, size_t len) |
| Returns the next pending about to expire, pending->timeout informs how many ms to next expiration. More... | |
| bool | coap_pending_cycle (struct coap_pending *pending) |
| After a request is sent, user may want to cycle the pending retransmission so the timeout is updated. More... | |
| void | coap_pending_clear (struct coap_pending *pending) |
| Cancels the pending retransmission, so it again becomes available. More... | |
| void | coap_pendings_clear (struct coap_pending *pendings, size_t len) |
| Cancels all pending retransmissions, so they become available again. More... | |
| void | coap_reply_clear (struct coap_reply *reply) |
| Cancels awaiting for this reply, so it becomes available again. User responsibility to free the memory associated with data. More... | |
| void | coap_replies_clear (struct coap_reply *replies, size_t len) |
| Cancels all replies, so they become available again. More... | |
| int | coap_resource_notify (struct coap_resource *resource) |
| Indicates that this resource was updated and that the notify callback should be called for every registered observer. More... | |
| bool | coap_request_is_observe (const struct coap_packet *request) |
| Returns if this request is enabling observing a resource. More... | |
CoAP implementation for Zephyr.
1.9.2