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hook_pkt_event(9s)

Kernel & Driver Data Structures                             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 call‐
       back 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_pro‐
                     tocol_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 possi‐
                         ble 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(7) for descriptions of the following attributes:


       tab()  box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
       TRIBUTE VALUE _ Interface StabilityCommitted


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



Oracle Solaris 11.4               1 May 2008                hook_pkt_event(9S)
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