Data Structures for Drivers                            hookt(9S)



NAME
     hookt -  callback  structure  for  subscribing  to  netinfo
     events

SYNOPSIS
     #include 


INTERFACE LEVEL
     Solaris DI specific (Solaris DI).

DESCRIPTION
     The hookt data structure defines a callback that is  to  be
     inserted  into  a networking event. This data structure must
     be allocated with a call to hookalloc() and released with a
     call to hookfree().

STRUCTURE MEMBERS
       hookfunct  hfunc;      /* callback function to invoke */
       char         *hname;     /* unique name given to the hook */
       int          hflags;
       hookhintt  hhint;      /* insertion hint type */
       uintptrt    hhintvalue; /* used with hhint */
       void         *harg;      /* value to pass into hfunc */

       typedef int (*hookfunct)(neteventt token, hookdatat info,
                     void *);


  HINT TYPES
     Hook hints are hints that are used at the time of  insertion
     and  are  not  rules that enforce where a hook lives for its
     entire lifetime on an event. The valid values for the hhint
     field are:

     HNONE      Insert the hook wherever convenient.


     HFIRST     Place the hook first on the list of hooks.


     HLAST      Place the hook last on the list of hooks.


     HBEFORE    Place the hook before another hook on the  list
                  of  hooks.  The  value in hhintvalue must be a
                  pointer to the name of another hook.


     HAFTER     Place the hook after another hook on  the  list
                  of  hooks.  The  value in hhintvalue must be a
                  pointer to the name of another hook.



SunOS 5.11           Last change: 1 May 2008                    1






Data Structures for Drivers                            hookt(9S)



ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Interface Stability          Committed                   
    


SEE ALSO
     netinfo(9F)








































SunOS 5.11           Last change: 1 May 2008                    2