net_isvalidchecksum man page on SunOS

net_isvalidchecksum man page on SunOS

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

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
       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_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	 manu‐
       ally 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.

       0     The packet does not contain partial checksums.

       1     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	   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Availability		     │SUNWcsu			   │
       ├─────────────────────────────┼─────────────────────────────┤
       │Interface Stability	     │Committed			   │
       └─────────────────────────────┴─────────────────────────────┘

SEE ALSO
       net_ispartialchecksum(9F), net_protocol_lookup(9F), attributes(5)

SunOS 5.10			  1 May 2008	       net_isvalidchecksum(9F)

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