contrib/isc-dhcp/includes/statement.h

   1 /* statement.h
   2
   3    Definitions for executable statements... */
   4
   5 /*
   6  * Copyright (c) 1996-1999 Internet Software Consortium.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of The Internet Software Consortium nor the names
  19  *    of its contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
  23  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  24  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26  * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
  27  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  29  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  30  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  31  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  33  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * This software has been written for the Internet Software Consortium
  37  * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
  38  * To learn more about the Internet Software Consortium, see
  39  * ``http://www.isc.org/''.  To learn more about Vixie Enterprises,
  40  * see ``http://www.vix.com''.   To learn more about Nominum, Inc., see
  41  * ``http://www.nominum.com''.
  42  */
  43
  44 struct executable_statement {
  45         int refcnt;
  46         struct executable_statement *next;
  47         enum statement_op {
  48                 null_statement,
  49                 if_statement,
  50                 add_statement,
  51                 eval_statement,
  52                 break_statement,
  53                 default_option_statement,
  54                 supersede_option_statement,
  55                 append_option_statement,
  56                 prepend_option_statement,
  57                 send_option_statement,
  58                 statements_statement,
  59                 on_statement,
  60                 switch_statement,
  61                 case_statement,
  62                 default_statement,
  63                 set_statement,
  64                 unset_statement,
  65                 let_statement,
  66                 define_statement,
  67                 log_statement,
  68                 return_statement
  69         } op;
  70         union {
  71                 struct {
  72                         struct executable_statement *tc, *fc;
  73                         struct expression *expr;
  74                 } ie;
  75                 struct expression *eval;
  76                 struct expression *retval;
  77                 struct class *add;
  78                 struct option_cache *option;
  79                 struct option_cache *supersede;
  80                 struct option_cache *prepend;
  81                 struct option_cache *append;
  82                 struct executable_statement *statements;
  83                 struct {
  84                         int evtypes;
  85 #                       define ON_COMMIT  1
  86 #                       define ON_EXPIRY  2
  87 #                       define ON_RELEASE 4
  88 #                       define ON_TRANSMISSION 8
  89                         struct executable_statement *statements;
  90                 } on;
  91                 struct {
  92                         struct expression *expr;
  93                         struct executable_statement *statements;
  94                 } s_switch;
  95                 struct expression *c_case;
  96                 struct {
  97                         char *name;
  98                         struct expression *expr;
  99                         struct executable_statement *statements;
 100                 } set, let;
 101                 char *unset;
 102                 struct {
 103                         enum {
 104                                 log_priority_fatal,
 105                                 log_priority_error,
 106                                 log_priority_debug,
 107                                 log_priority_info
 108                         } priority;
 109                         struct expression *expr;
 110                 } log;
 111         } data;
 112 };
 113