netbuf_len() — Obtain the total length of a netbuf
(struct netbuf *buf
Returns the total length of the data in the netbuf
buf, even if the netbuf is fragmented. For a
fragmented netbuf, the value obtained by calling this function is not the
same as the size of the first fragment in the netbuf.
|2018-06-19||LWIP Documentation Notices|