Function crypto_buffer_contiguous_subsegment

freebsd/opencrypto/criov.c:738–763

}

void *
crypto_buffer_contiguous_subsegment(struct crypto_buffer *cb, size_t skip,
    size_t len)
{

	switch (cb->cb_type) {
	case CRYPTO_BUF_MBUF:
		return (m_contiguous_subsegment(cb->cb_mbuf, skip, len));
	case CRYPTO_BUF_UIO:
		return (cuio_contiguous_segment(cb->cb_uio, skip, len));
#if CRYPTO_MAY_HAVE_VMPAGE
	case CRYPTO_BUF_VMPAGE:
		MPASS(skip + len <= cb->cb_vm_page_len);
		return (cvm_page_contiguous_segment(cb->cb_vm_page,
		    skip + cb->cb_vm_page_offset, len));
#endif /* CRYPTO_MAY_HAVE_VMPAGE */
	case CRYPTO_BUF_CONTIG:
		MPASS(skip + len <= cb->cb_buf_len);
		return (cb->cb_buf + skip);
	default:
#ifdef INVARIANTS
		panic("invalid crp buf type %d", cb->cb_type);
#endif
		return (NULL);
	}
}

void *
crypto_contiguous_subsegment(struct cryptop *crp, size_t skip, size_t len)