cbcp_header
struct cbcp_header *head;
head = (struct cbcp_header *)MBUF_CTOP(bp);
struct cbcp_header *head;
if (len < sizeof(struct cbcp_header)) {
head = (struct cbcp_header *)MBUF_CTOP(bp);
bp->m_offset += sizeof(struct cbcp_header);
bp->m_len -= sizeof(struct cbcp_header);