embedaddon/dhcp/includes/tree.h - view

File: [ELWIX - Embedded LightWeight unIX -] / embedaddon / dhcp / includes / tree.h
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs - revision graph
Tue Oct 9 09:06:54 2012 UTC (12 years, 2 months ago) by misho
Branches: dhcp, MAIN
CVS tags: v4_1_R7p0, v4_1_R7, v4_1_R4, HEAD

dhcp 4.1 r7

/* tree.h Definitions for address trees... */ /* * Copyright (c) 2011 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 2004,2007-2009 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996-2003 by Internet Software Consortium * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Internet Systems Consortium, Inc. * 950 Charter Street * Redwood City, CA 94063 * <info@isc.org> * https://www.isc.org/ * * This software has been written for Internet Systems Consortium * by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc. * To learn more about Internet Systems Consortium, see * ``https://www.isc.org/''. To learn more about Vixie Enterprises, * see ``http://www.vix.com''. To learn more about Nominum, Inc., see * ``http://www.nominum.com''. */ /* A pair of pointers, suitable for making a linked list. */ typedef struct _pair { caddr_t car; struct _pair *cdr; } *pair; struct option_chain_head { int refcnt; pair first; }; struct enumeration_value { const char *name; u_int8_t value; }; struct enumeration { struct enumeration *next; const char *name; unsigned width; struct enumeration_value *values; }; /* Tree node types... */ #define TREE_CONCAT 1 #define TREE_HOST_LOOKUP 2 #define TREE_CONST 3 #define TREE_LIMIT 4 #define TREE_DATA_EXPR 5 /* A data buffer with a reference count. */ struct buffer { int refcnt; unsigned char data [1]; }; /* XXX The mechanism by which data strings are returned is currently XXX broken: rather than returning an ephemeral pointer, we create XXX a reference to the data in the caller's space, which the caller XXX then has to dereference - instead, the reference should be XXX ephemeral by default and be made a persistent reference explicitly. */ /* XXX on the other hand, it seems to work pretty nicely, so maybe the XXX above comment is meshuggenah. */ /* XXX I think the above comment tries to say this: XXX http://tinyurl.com/2tjqre */ /* A string of data bytes, possibly accompanied by a larger buffer. */ struct data_string { struct buffer *buffer; const unsigned char *data; unsigned len; /* Does not include NUL terminator, if any. */ int terminated; }; enum expression_context { context_any, /* indefinite */ context_boolean, context_data, context_numeric, context_dns, context_data_or_numeric, /* indefinite */ context_function }; struct fundef { int refcnt; struct string_list *args; struct executable_statement *statements; }; struct binding_value { int refcnt; enum { binding_boolean, binding_data, binding_numeric, binding_dns, binding_function } type; union value { struct data_string data; unsigned long intval; int boolean; #if defined (NSUPDATE) ns_updrec *dns; #endif struct fundef *fundef; struct binding_value *bv; } value; }; struct binding { struct binding *next; char *name; struct binding_value *value; }; struct binding_scope { int refcnt; struct binding_scope *outer; struct binding *bindings; }; /* Expression tree structure. */ enum expr_op { expr_none, expr_match, expr_check, expr_equal, expr_substring, expr_suffix, expr_concat, expr_host_lookup, expr_and, expr_or, expr_not, expr_option, expr_hardware, expr_packet, expr_const_data, expr_extract_int8, expr_extract_int16, expr_extract_int32, expr_encode_int8, expr_encode_int16, expr_encode_int32, expr_const_int, expr_exists, expr_encapsulate, expr_known, expr_reverse, expr_leased_address, expr_binary_to_ascii, expr_config_option, expr_host_decl_name, expr_pick_first_value, expr_lease_time, expr_dns_transaction, expr_static, expr_ns_add, expr_ns_delete, expr_ns_exists, expr_ns_not_exists, expr_not_equal, expr_null, expr_variable_exists, expr_variable_reference, expr_filename, expr_sname, expr_arg, expr_funcall, expr_function, expr_add, expr_subtract, expr_multiply, expr_divide, expr_remainder, expr_binary_and, expr_binary_or, expr_binary_xor, expr_client_state, expr_ucase, expr_lcase, expr_regex_match, expr_iregex_match }; struct expression { int refcnt; enum expr_op op; union expr_union { struct { struct expression *expr; struct expression *offset; struct expression *len; } substring; struct expression *equal [2]; struct expression *and [2]; struct expression *or [2]; struct expression *not; struct expression *add; struct expression *subtract; struct expression *multiply; struct expression *divide; struct expression *remainder; struct collection *check; struct { struct expression *expr; struct expression *len; } suffix; struct expression *lcase; struct expression *ucase; struct option *option; struct option *config_option; struct { struct expression *offset; struct expression *len; } packet; struct data_string const_data; struct expression *extract_int; struct expression *encode_int; unsigned long const_int; struct expression *concat [2]; struct dns_host_entry *host_lookup; struct option *exists; struct data_string encapsulate; struct { struct expression *base; struct expression *width; struct expression *separator; struct expression *buffer; } b2a; struct { struct expression *width; struct expression *buffer; } reverse; struct { struct expression *car; struct expression *cdr; } pick_first_value; struct { struct expression *car; struct expression *cdr; } dns_transaction; struct { unsigned rrclass; unsigned rrtype; struct expression *rrname; struct expression *rrdata; struct expression *ttl; } ns_add; struct { unsigned rrclass; unsigned rrtype; struct expression *rrname; struct expression *rrdata; } ns_delete, ns_exists, ns_not_exists; char *variable; struct { struct expression *val; struct expression *next; } arg; struct { char *name; struct expression *arglist; } funcall; struct fundef *func; } data; int flags; # define EXPR_EPHEMERAL 1 }; /* DNS host entry structure... */ struct dns_host_entry { int refcnt; TIME timeout; struct data_string data; char hostname [1]; }; struct option_cache; /* forward */ struct packet; /* forward */ struct option_state; /* forward */ struct decoded_option_state; /* forward */ struct lease; /* forward */ struct client_state; /* forward */ struct universe { const char *name; struct option_cache *(*lookup_func) (struct universe *, struct option_state *, unsigned); void (*save_func) (struct universe *, struct option_state *, struct option_cache *, isc_boolean_t); void (*foreach) (struct packet *, struct lease *, struct client_state *, struct option_state *, struct option_state *, struct binding_scope **, struct universe *, void *, void (*) (struct option_cache *, struct packet *, struct lease *, struct client_state *, struct option_state *, struct option_state *, struct binding_scope **, struct universe *, void *)); void (*delete_func) (struct universe *universe, struct option_state *, int); int (*option_state_dereference) (struct universe *, struct option_state *, const char *, int); int (*decode) (struct option_state *, const unsigned char *, unsigned, struct universe *); int (*encapsulate) (struct data_string *, struct packet *, struct lease *, struct client_state *, struct option_state *, struct option_state *, struct binding_scope **, struct universe *); u_int32_t (*get_tag) (const unsigned char *); void (*store_tag) (unsigned char *, u_int32_t); u_int32_t (*get_length) (const unsigned char *); void (*store_length) (unsigned char *, u_int32_t); int tag_size, length_size; unsigned site_code_min, end; option_name_hash_t *name_hash; option_code_hash_t *code_hash; struct option *enc_opt; int index; /* Flags should probably become condensed. */ int concat_duplicates; }; struct option { const char *name; const char *format; struct universe *universe; unsigned code; int refcnt; };