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Copyright (C) 2008, Sun Microsystems, Inc. All Rights Reserved.
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
mb
0
NET_HCK_L3_PART
NET_HCK_L4_FULL
NET_HCK_L4_PART
Copyright (C) 2008, Sun Microsystems, Inc. All Rights Reserved.
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
NET_ISPARTIALCHECKSUM 9F "May 1, 2008"
NAME
net_ispartialchecksum - indicate if a packet is being scheduled for hardware
checksum calculation
SYNOPSIS
#include <sys/neti.h> int net_ispartialchecksum(const net_data_t net, mblk_t *mb);
INTERFACE LEVEL
illumos DDI specific (illumos DDI).
PARAMETERS
net
value returned from a successful call to net_protocol_lookup(9F).
the mblk structure holding a packet that is the subject of this query.
DESCRIPTION
The net_ispartialchecksum() function looks at the fields within the
mblk structure to determine if the packet contained inside contains
headers with only partial checksum values. Partial checksum values are stored
inside headers when the calculation of the complete checksum is being handled
by the hardware.
RETURN VALUES
The net_ispartialchecksum() function returns:
-1
The network protocol does not support this function.
The packet does not contain partial checksums.
If a packet is marked for hardware checksum'ing, the following values are returned: NET_HCK_L3_FULL
Complete layer 3 checksum calculated
Partial layer 3 checksum calculated
Complete layer 4 checksum calculated
Partial layer 4 checksum calculated
CONTEXT
The net_ispartialchecksum() function may be called from user, kernel, or
interrupt context.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Committed |
SEE ALSO
attributes (7), net_isvalidchecksum (9F), net_protocol_lookup (9F)