Login or Register to Ask a Question and Join Our Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

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_routeto(9F) 					   Kernel Functions for Drivers 					   net_routeto(9F)

NAME

       net_routeto - indicate which network interface packets are sent

SYNOPSIS

       #include <sys/neti.h>

       phy_if_t net_routeto(const net_data_t *net, struct sockaddr *address,
	    struct sockaddr *nexthop);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       net	  value returned from a successful call to net_protocol_lookup(9F).

       address	  network address to find a path out of the machine for.

       nexthop	  pointer  to the sockaddr structure in which to store the address of the next hop. If this information is not required, the value
		  NULL may be passed instead.

DESCRIPTION

       The net_routeto() function indicates which network interface packets destined for a particular address would be sent out of,  according	to
       the  systems network routing tables. If next is supplied as a non-NULL pointer, the IP address of the nexthop router to be used is returned
       in it.

RETURN VALUES

       The net_routeto() function returns:

       -1    The network protocol does not support this function.

       0     This function cannot find a route for the address given.

       >0    Indicates which network interface can be used to reach the given address.

CONTEXT

       The net_routeto() 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_phygetnext(9F), net_phylookup(9F), net_protocol_lookup(9F), attributes(5)

SunOS 5.11							    1 May 2008							   net_routeto(9F)
Man Page