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coap_read(3)
coap_deprecated

## NAME

coap_deprecated, coap_clear_event_handler, coap_context_set_psk, coap_encode_var_bytes, coap_new_client_session_psk, coap_option_clrb, coap_option_getb, coap_option_setb, coap_read, coap_register_handler, coap_resource_set_dirty, coap_run_once, coap_set_event_handler, coap_write - Work with CoAP deprecated functions

## SYNOPSIS

#include <coap3/coap.h>

void coap_clear_event_handler(coap_context_t *context);

int coap_context_set_psk(coap_context_t *context, const char *hint, const uint8_t *key, size_t key_len);

int coap_encode_var_bytes(uint8_t *buffer, unsigned int value);

coap_session_t *coap_new_client_session_psk(coap_context_t *context, const coap_address_t *local_if, const coap_address_t *server, coap_proto_t proto, const char *identity, const uint8_t *key, unsigned key_len);

int coap_option_clrb(coap_opt_filter_t *filter, uint16_t type);

int coap_option_getb(coap_opt_filter_t *filter, uint16_t type);

int coap_option_setb(coap_opt_filter_t *filter, uint16_t type);

void coap_read(coap_context_t *context, coap_tick_t now);

void coap_register_handler(coap_resource_t *resource, coap_request_t method, coap_method_handler_t handler);

int coap_resource_set_dirty(coap_resource_t *resource, const coap_string_t *query);

int coap_run_once(coap_context_t *context, uint32_t timeout_ms);

void coap_set_event_handler(coap_context_t *context, coap_event_handler_t handler);

unsigned int coap_write(coap_context_t *context, coap_socket_t *sockets[], unsigned int max_sockets, unsigned int *num_sockets, coap_tick_t now);

For specific (D)TLS library support, link with -lcoap-3-notls, -lcoap-3-gnutls, -lcoap-3-openssl, -lcoap-3-mbedtls or -lcoap-3-tinydtls. Otherwise, link with -lcoap-3 to get the default (D)TLS library support.

## DESCRIPTION

Several of the existing CoAP API functions have been deprecated. These are listed here, along with the functions that should now be used instead.

## FUNCTIONS

Function: coap_clear_event_handler()

The coap_clear_event_handler() function is replaced by coap_register_event_handler(3), using NULL for handler.

Function: coap_context_set_psk()

The coap_context_set_psk() function is replaced by coap_context_set_psk2(3) which gives additional PSK configuration capability by the use of the coap_dtls_spsk_t structure.

Function: coap_encode_var_bytes()

The coap_encode_var_bytes() function is replaced by coap_encode_var_safe(3).

Function: coap_new_client_session_psk()

The coap_new_client_session_psk() function is replaced by coap_new_client_session_psk2(3) which gives additional PSK configuration capability by the use of the coap_dtls_cpsk_t structure.

Function: coap_option_clrb()

The coap_option_clrb() function is replaced by coap_option_filter_unset(3).

Function: coap_option_getb()

The coap_option_getb() function is replaced by coap_option_filter_get(3).

Function: coap_option_setb()

The coap_option_setb() function is replaced by coap_option_filter_set(3).

Function: coap_read()

The coap_read() function is replaced by coap_io_do_io(3).

Function: coap_register_handler()

The coap_register_handler() function is replaced by coap_register_request_handler(3).

Function: coap_resource_set_dirty()

The coap_resource_set_dirty() function is replaced by coap_resource_notify_observers(3).

Function: coap_run_once()

The coap_run_once() function is replaced by coap_io_process(3).

Function: coap_set_event_handler()

The coap_set_event_handler() function is replaced by coap_register_event_handler(3).

Function: coap_clear_event_handler()

The coap_write() function is replaced by coap_io_prepare_io(3).

## RETURN VALUES

coap_context_set_psk() returns 1 if success, 0 on failure.

coap_encode_var_bytes() returns either the length of bytes encoded (which can be 0 when encoding 0) or 0 on failure.

coap_new_client_session_psk() returns a new session if success, NULL on failure.

coap_option_clrb() returns 1 if bit was set, -1 otherwise.

coap_option_getb() returns 1 if bit was set, 0 if not.

coap_option_setb() returns 1 if bit was set, -1 otherwise.

coap_resource_set_dirty() returns 1 if success, 0 on failure.

coap_run_once() returns number of milliseconds spent in function or -1 if there was an error.

coap_write() returns the number of milli-seconds that need to be waited before the function should next be called.

## SEE ALSO

coap_endpoint_client(3), coap_endpoint_server(3), coap_handler(3), coap_io(3), coap_observe(3), coap_pdu_access(3) and coap_pdu_setup(3).

## FURTHER INFORMATION

See

"RFC7252: The Constrained Application Protocol (CoAP)"

for further information.

## BUGS

Please report bugs on the mailing list for libcoap: libcoap-developers@lists.sourceforge.net or raise an issue on GitHub at https://github.com/obgm/libcoap/issues

## AUTHORS

The libcoap project <libcoap-developers@lists.sourceforge.net>

coap_read(3)