coap_startup3
Work with coap initialization
Part of coap_init(3).
Usage
void coap_startup(void);
void coap_cleanup(void);
Overview
The CoAP libcoap logic needs to be initialized before there is any use of the libcoap public API. This is done by calling coap_startup().
Functions
Function: coap_startup()
The coap_startup() function must be called before any other coap_*() functions are called. It is used to initialize things like mutexes, random number gererators, clocks, TLS libraries etc.
NOTE: This should be called after any other lower layer is initialized. For example, for LwIP, lwip_init() must be called before coap_startup().
NOTE: After the inital call to coap_startup(), subsequent calls are ignored until coap_cleanup() is called.
Function: coap_cleanup()
The coap_cleanup() function is used to cleanup / free any information set up by the coap_startup() function and should be the last coap_*() function called. It is possible to call coap_startup() after coap_cleanup() to re-initialize the libcoap logic.
NOTE: All other libcoap cleanups should called prior to coap_cleanup(), e.g. coap_free_context(3).
Further information
See
"RFC7252: The Constrained Application Protocol (CoAP)"
for further information.