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)

hook_pkt_event(9S)					    Data Structures for Drivers 					hook_pkt_event(9S)

NAME

       hook_pkt_event - packet event structure passed through to hooks

SYNOPSIS

       #include <sys/neti.h>
       #include <sys/hook.h>
       #include <sys/hook_event.h>

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

DESCRIPTION

       The  hook_pkt_event  structure contains fields that relate to a packet in a network protocol handler. This structure is passed through to a
       callback for NH_PRE_ROUTING, NH_POST_ROUTING, NH_FORWARDING, NH_LOOPBACK_IN and NH_LOOPBACK_OUT events.

       A callback may only modify the hpe_hdr, hpe_mp and hpe_mb fields.

       The following table documents which fields can be safely used as a result of each event.

	 Event		  hpe_ifp     hpe_ofp	  hpe_hdr     hpe_mp	 hpe_mb
	 -----		  -------     -------	  -------     ------	 ------
	 NH_PRE_ROUTING      yes		     yes	 yes	   yes
	 NH_POST_ROUTING		 yes	     yes	 yes	   yes
	 NH_FORWARDING	     yes	 yes	     yes	 yes	   yes
	 NH_LOOPBACK_IN      yes		     yes	 yes	   yes
	 NH_LOOPBACK_OUT		 yes	     yes	 yes	   yes

STRUCTURE MEMBERS

	 net_data_t	      hne_family;
	 phy_if_t	      hpe_ifp;
	 phy_if_t	      hpe_ofp;
	 void		      *hpe_hdr;
	 mblk_t 	      *hpe_mp;
	 mblk_t 	      *hpe_mb;
	 uint32_t	      hpe_flags;

       The following fields are set for each event:

       hne_family    The protocol family for this packet. This	value  matches	the  corresponding  value  returned  from  a  call  to	net_proto-
		     col_lookup(9F).

       hpe_ifp	     The inbound interface for a packet.

       hpe_ofp	     The outbound interface for a packet.

       hpe_hdr	     Pointer to the start of the network protocol header within an mblk_t structure.

       hpe_mp	     Pointer to the mblk_t pointer that points to the first mblk_t structure in this packet.

       hpe_mb	     Pointer to the mblk_t structure that contains hpe_hdr.

       hpe_flags    This field is used to carry additional properties of packets. The current collection of defined bits available is:

		    HPE_BROADCAST    This bit is set if the packet was recognized as a broadcast packet from the link layer. The bit cannot be set
				     if HPE_MULTICAST is set, currently only possible with physical in packet events.

		    HPE_MULTICAST    This set if the packet was recognized as a multicast packet from the link layer. This bit cannot  be  set	if
				     HPE_BROADCAST is set, currently only possible with physical in packet events.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       net_protocol_lookup(9F), netinfo(9F)

SunOS 5.11							    1 May 2008							hook_pkt_event(9S)