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_protocol_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 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. 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 5.11 1 May 2008 net_isvalidchecksum(9F)