hook_pkt_event(9s) [opensolaris man page]

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)

Check Out this Related Man Page

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)

Linux and UNIX Man Pages

hook_pkt_event(9s) [opensolaris man page]

Check Out this Related Man Page