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|
/*
* BIRD -- Configuration Parser Top
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
CF_HDR
#define PARSER 1
#include "nest/bird.h"
#include "conf/conf.h"
#include "lib/resource.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "lib/string.h"
#include "nest/protocol.h"
#include "nest/iface.h"
#include "nest/route.h"
#include "nest/cli.h"
#include "filter/filter.h"
/* FIXME: Turn on YYERROR_VERBOSE and work around lots of bison bugs? */
CF_DEFINES
static void
check_u16(unsigned val)
{
if (val > 0xFFFF)
cf_error("Value %d out of range (0-65535)", val);
}
CF_DECLS
%union {
int i;
u32 i32;
ip_addr a;
struct symbol *s;
char *t;
struct rtable_config *r;
struct f_inst *x;
struct filter *f;
struct f_tree *e;
struct f_trie *trie;
struct f_val v;
struct f_path_mask *h;
struct password_item *p;
struct rt_show_data *ra;
void *g;
bird_clock_t time;
struct prefix px;
struct proto_spec ps;
struct timeformat *tf;
}
%token END CLI_MARKER INVALID_TOKEN ELSECOL DDOT
%token GEQ LEQ NEQ AND OR
%token PO PC
%token <i> NUM ENUM
%token <i32> RTRID
%token <a> IPA
%token <s> SYM
%token <t> TEXT
%type <i> expr bool pxlen
%type <time> datetime
%type <a> ipa
%type <px> prefix prefix_or_ipa
%type <t> text_or_none
%nonassoc PREFIX_DUMMY
%left AND OR
%nonassoc '=' '<' '>' '~' GEQ LEQ NEQ PO PC
%left '+' '-'
%left '*' '/' '%'
%left '!'
%nonassoc '.'
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO)
CF_GRAMMAR
/* Basic config file structure */
config: conf_entries END { return 0; }
| CLI_MARKER cli_cmd { return 0; }
;
conf_entries:
/* EMPTY */
| conf_entries conf
;
CF_ADDTO(conf, ';')
/* Constant expressions */
expr:
NUM
| '(' term ')' { $$ = f_eval_int($2); }
| SYM { if ($1->class != SYM_NUMBER) cf_error("Number expected"); else $$ = $1->aux; }
;
/* expr_u16: expr { check_u16($1); $$ = $1; }; */
CF_ADDTO(conf, definition)
definition:
DEFINE SYM '=' expr ';' {
cf_define_symbol($2, SYM_NUMBER, NULL);
$2->aux = $4;
}
| DEFINE SYM '=' IPA ';' {
cf_define_symbol($2, SYM_IPA, cfg_alloc(sizeof(ip_addr)));
*(ip_addr *)$2->def = $4;
}
;
/* Switches */
bool:
expr {$$ = !!$1; }
| ON { $$ = 1; }
| YES { $$ = 1; }
| OFF { $$ = 0; }
| NO { $$ = 0; }
| /* Silence means agreement */ { $$ = 1; }
;
/* Addresses, prefixes and netmasks */
ipa:
IPA
| SYM {
if ($1->class != SYM_IPA) cf_error("IP address expected");
$$ = *(ip_addr *)$1->def;
}
;
prefix:
ipa pxlen {
if (!ip_is_prefix($1, $2)) cf_error("Invalid prefix");
$$.addr = $1; $$.len = $2;
}
;
prefix_or_ipa:
prefix
| ipa { $$.addr = $1; $$.len = BITS_PER_IP_ADDRESS; }
;
pxlen:
'/' expr {
if ($2 < 0 || $2 > BITS_PER_IP_ADDRESS) cf_error("Invalid prefix length %d", $2);
$$ = $2;
}
| ':' ipa {
$$ = ipa_mklen($2);
if ($$ < 0) cf_error("Invalid netmask %I", $2);
}
;
datetime:
TEXT {
$$ = tm_parse_datetime($1);
if (!$$)
cf_error("Invalid date and time");
}
;
text_or_none:
TEXT { $$ = $1; }
| { $$ = NULL; }
;
CF_CODE
CF_END
|
