ot::Coap::Option::Iterator class

Initializes the iterator to iterate over CoAP Options in a CoAP message. The iterator MUST be initialized before any other methods are used, otherwise its behavior is undefined. After initialization, the iterator is either updated to point to the first option, or it is marked as done (i.e., `IsDone()` returns `true`) when there is no option or if there is a parse error.

Initializes the iterator to iterate over CoAP Options in a CoAP message. The iterator MUST be initialized before any other methods are used, otherwise its behavior is undefined. After initialization, the iterator is either updated to point to the first option, or it is marked as done (i.e., `IsDone()` returns `true`) when there is no option or if there is a parse error.

Indicates whether or not the iterator is done (i.e., has reached the end of CoAP Option Header).

Indicates whether or not there was a earlier parse error (i.e., whether the iterator is valid). After a parse errors, iterator would also be marked as done.

Advances the iterator to the next CoAP Option in the header. The iterator is updated to point to the next option or marked as done when there are no more options.

Advances the iterator to the next CoAP Option in the header. The iterator is updated to point to the next option or marked as done when there are no more options.

Gets the CoAP message associated with the iterator.

Gets a pointer to the current CoAP Option to which the iterator is currently pointing.

Reads the current Option Value into a given buffer.

Reads the current Option Value into a given buffer.

Gets the offset of beginning of the CoAP message payload (after the CoAP header). MUST be used after the iterator is done (i.e. iterated through all options).

Gets the offset of beginning of the CoAP Option Value. MUST be used during the iterator is in progress.