Manual Pages for UNIX Operating System command usage for man hook_pkt_event

Data Structures for Drivers                    hook_pkt_event(9S)



NAME
     hook_pkt_event - packet event structure  passed  through  to
     hooks

SYNOPSIS
     #include 
     #include 
     #include 


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;









SunOS 5.11           Last change: 1 May 2008                    1






Data Structures for Drivers                    hook_pkt_event(9S)



     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_protocol_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  proper-
                  ties  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  attri-
     butes:




SunOS 5.11           Last change: 1 May 2008                    2






Data Structures for Drivers                    hook_pkt_event(9S)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|


SEE ALSO
     net_protocol_lookup(9F), netinfo(9F)














































SunOS 5.11           Last change: 1 May 2008                    3