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net_ispartialchecksum(9f) [opensolaris man page]

net_ispartialchecksum(9F)				   Kernel Functions for Drivers 				 net_ispartialchecksum(9F)

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
Solaris DDI specific (Solaris DDI). PARAMETERS
net value returned from a successful call to net_protocol_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 | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
net_isvalidchecksum(9F), net_protocol_lookup(9F), attributes(5) SunOS 5.11 1 May 2008 net_ispartialchecksum(9F)

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net_protocol_lookup(9F) 				   Kernel Functions for Drivers 				   net_protocol_lookup(9F)

NAME
net_protocol_lookup - locate an implementation of a network layer protocol SYNOPSIS
#include <sys/neti.h> net_data_t net_protocol_lookup(netid_t id, const char *protocol); INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). PARAMETERS
id network instance identifier. family name of the network protocol to find. DESCRIPTION
The net_protocol_lookup() function attempts to locate a data structure that defines what capabilities it is exporting through this inter- face. The value returned by this call is guaranteed to be valid until it is passed into a call to net_protocol_release(9F), after which it should no longer be treated as valid. The protocol must be a registered name of a network protocol that has been registered. The symbols NHF_INET and NHF_INET6 should be passed to net_protocol_lookup() as the protocol name to gain access to either IPv4 or IPv6 respectively. RETURN VALUES
The net_protocol_lookup() function returns NULL if it does not find any knowledge about the network protocol referenced. Otherwise, it returns a value that can be used with other calls in this framework. CONTEXT
The net_protocol_lookup() function may be called from user, kernel, or interrupt context. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
net_protocol_release(9F), attributes(5) SunOS 5.11 1 May 2008 net_protocol_lookup(9F)
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