pbuf_alloced_custom() function

header size

size of the pbuf's payload

type of the pbuf (only used to treat the pbuf accordingly, as this function allocates no memory)

pointer to the custom pbuf to initialize (already allocated)

pointer to the buffer that is used for payload and headers, must be at least big enough to hold 'length' plus the header size, may be NULL if set later. ATTENTION: The caller is responsible for correct alignment of this buffer!!

the size of the 'payload_mem' buffer, must be at least big enough to hold 'length' plus the header size