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https://gitlab.nic.cz/labs/bird.git
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b1a597e0c3
Prefix sets were broken beyond any repair and have to be reimplemented. They are reimplemented using a trie with bitmasks in nodes. There is also change in the interpretation of minus prefix pattern, but the old interpretation was already inconsistent with the documentation and broken. There is also some bugfixes in filter code related to set variables.
159 lines
2.8 KiB
Plaintext
159 lines
2.8 KiB
Plaintext
/*
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* BIRD -- Configuration Parser Top
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*
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* (c) 1998--2000 Martin Mares <mj@ucw.cz>
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*
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* Can be freely distributed and used under the terms of the GNU GPL.
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*/
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CF_HDR
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#include "nest/bird.h"
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#include "conf/conf.h"
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#include "lib/resource.h"
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#include "lib/socket.h"
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#include "lib/timer.h"
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#include "lib/string.h"
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#include "nest/protocol.h"
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#include "nest/iface.h"
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#include "nest/route.h"
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#include "nest/cli.h"
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#include "filter/filter.h"
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/* FIXME: Turn on YYERROR_VERBOSE and work around lots of bison bugs? */
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CF_DECLS
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%union {
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int i;
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u32 i32;
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ip_addr a;
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struct symbol *s;
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char *t;
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struct rtable_config *r;
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struct f_inst *x;
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struct filter *f;
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struct f_tree *e;
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struct f_trie *trie;
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struct f_val v;
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struct f_path_mask *h;
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struct password_item *p;
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struct rt_show_data *ra;
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void *g;
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bird_clock_t time;
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struct prefix px;
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}
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%token END CLI_MARKER INVALID_TOKEN
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%token GEQ LEQ NEQ AND OR
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%token PO PC
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%token <i> NUM ENUM
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%token <i32> RTRID
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%token <a> IPA
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%token <s> SYM
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%token <t> TEXT
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%type <i> expr bool pxlen
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%type <time> datetime
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%type <a> ipa
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%type <px> prefix prefix_or_ipa
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%nonassoc PREFIX_DUMMY
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%nonassoc '=' '<' '>' '~' '.' GEQ LEQ NEQ AND OR PO PC
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%left '+' '-'
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%left '*' '/' '%'
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%left '!'
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CF_KEYWORDS(DEFINE, ON, OFF, YES, NO)
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CF_GRAMMAR
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/* Basic config file structure */
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config: conf_entries END { return 0; }
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| CLI_MARKER cli_cmd { return 0; }
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;
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conf_entries:
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/* EMPTY */
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| conf_entries conf
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;
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CF_ADDTO(conf, ';')
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/* Constant expressions */
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expr:
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NUM
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| '(' term ')' { $$ = f_eval_int($2); }
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| SYM { if ($1->class != SYM_NUMBER) cf_error("Number expected"); else $$ = $1->aux; }
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;
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CF_ADDTO(conf, definition)
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definition:
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DEFINE SYM '=' expr ';' {
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cf_define_symbol($2, SYM_NUMBER, NULL);
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$2->aux = $4;
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}
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| DEFINE SYM '=' IPA ';' {
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cf_define_symbol($2, SYM_IPA, cfg_alloc(sizeof(ip_addr)));
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*(ip_addr *)$2->def = $4;
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}
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;
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/* Switches */
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bool:
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expr {$$ = !!$1; }
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| ON { $$ = 1; }
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| YES { $$ = 1; }
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| OFF { $$ = 0; }
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| NO { $$ = 0; }
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| /* Silence means agreement */ { $$ = 1; }
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;
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/* Addresses, prefixes and netmasks */
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ipa:
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IPA
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| SYM {
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if ($1->class != SYM_IPA) cf_error("IP address expected");
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$$ = *(ip_addr *)$1->def;
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}
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;
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prefix:
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ipa pxlen {
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if (!ip_is_prefix($1, $2)) cf_error("Invalid prefix");
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$$.addr = $1; $$.len = $2;
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}
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;
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prefix_or_ipa:
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prefix
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| ipa { $$.addr = $1; $$.len = BITS_PER_IP_ADDRESS; }
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;
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pxlen:
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'/' expr {
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if ($2 < 0 || $2 > BITS_PER_IP_ADDRESS) cf_error("Invalid prefix length %d", $2);
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$$ = $2;
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}
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| ':' ipa {
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$$ = ipa_mklen($2);
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if ($$ < 0) cf_error("Invalid netmask %I", $2);
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}
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;
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datetime:
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TEXT {
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$$ = tm_parse_datetime($1);
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if (!$$)
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cf_error("Invalid date and time");
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}
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;
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CF_CODE
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CF_END
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