C++ (Cpp) icl_mbuf_to_crc32c Examples

Example #1

File: icl.c Project: lionel0806/freebsd

static int
icl_pdu_check_header_digest(struct icl_pdu *request, size_t *availablep)
{
	struct mbuf *m;
	uint32_t received_digest, valid_digest;

	if (request->ip_conn->ic_header_crc32c == false)
		return (0);

	m = icl_conn_receive(request->ip_conn, ISCSI_HEADER_DIGEST_SIZE);
	if (m == NULL) {
		ICL_DEBUG("failed to receive header digest");
		return (-1);
	}

	CTASSERT(sizeof(received_digest) == ISCSI_HEADER_DIGEST_SIZE);
	m_copydata(m, 0, ISCSI_HEADER_DIGEST_SIZE, (void *)&received_digest);
	m_freem(m);

	*availablep -= ISCSI_HEADER_DIGEST_SIZE;

	/*
	 * XXX: Handle AHS.
	 */
	valid_digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf);
	if (received_digest != valid_digest) {
		ICL_WARN("header digest check failed; got 0x%x, "
		    "should be 0x%x", received_digest, valid_digest);
		return (-1);
	}

	return (0);
}

Example #2

File: icl_soft.c Project: mulichao/freebsd

static int
icl_pdu_check_header_digest(struct icl_pdu *request, size_t *availablep)
{
	uint32_t received_digest, valid_digest;

	if (request->ip_conn->ic_header_crc32c == false)
		return (0);

	CTASSERT(sizeof(received_digest) == ISCSI_HEADER_DIGEST_SIZE);
	if (icl_conn_receive_buf(request->ip_conn,
	    &received_digest, ISCSI_HEADER_DIGEST_SIZE)) {
		ICL_DEBUG("failed to receive header digest");
		return (-1);
	}
	*availablep -= ISCSI_HEADER_DIGEST_SIZE;

	/* Temporary attach AHS to BHS to calculate header digest. */
	request->ip_bhs_mbuf->m_next = request->ip_ahs_mbuf;
	valid_digest = icl_mbuf_to_crc32c(request->ip_bhs_mbuf);
	request->ip_bhs_mbuf->m_next = NULL;
	if (received_digest != valid_digest) {
		ICL_WARN("header digest check failed; got 0x%x, "
		    "should be 0x%x", received_digest, valid_digest);
		return (-1);
	}

	return (0);
}