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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]
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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]
NET_ISVALIDCHECKSUM 9F "May 1, 2008"
NAME
net_isvalidchecksum - verify layer 3 and layer 4 checksums
SYNOPSIS
#include <sys/neti.h> int net_isvalidchecksum(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_isvalidchecksum() function verifies the layer 3 checksum (and, in
some case, the layer 4 checksum) in the packet. If possible, fields that are
used by hardware checksum'ing are examined rather than manually verifying that
the checksums are present for packets received from a network interface.
For both IPv4 and IPv6, TCP, UDP and ICMP (including ICMPV6 for IPv6) layer 4 checksums are currently validated.
RETURN VALUES
The net_isvalidchecksum() function returns:
-1
The network protocol does not support this function.
The packet does not contain partial checksums.
The packet does contain partial checksums.
CONTEXT
The net_isvalidchecksum() function may be called from user, kernel, or
interrupt context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Committed |
SEE ALSO
net_ispartialchecksum(9F), net_protocol_lookup(9F),
attributes(5)