NET_ISPARTIALCHECKSUM(9F)NET_ISPARTIALCHECKSUM(9F)NAMEnet_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
Solaris DDI specific (Solaris DDI).
PARAMETERS
net
value returned from a successful call to net_proto‐
col_lookup(9F).
mb
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.
0
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
NET_HCK_L3_PART
Partial layer 3 checksum calculated
NET_HCK_L4_FULL
Complete layer 4 checksum calculated
NET_HCK_L4_PART
Partial layer 4 checksum calculated
CONTEXT
The net_ispartialchecksum() 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 ALSOnet_isvalidchecksum(9F), net_protocol_lookup(9F), attributes(5)
May 1, 2008 NET_ISPARTIALCHECKSUM(9F)
