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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;
ip4_addr ip4;
ip6_addr ip6;
net_addr_union net;
net_addr *net_ptr;
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;
struct roa_show_data *ro;
struct sym_show_data *sd;
struct lsadb_show_data *ld;
struct iface *iface;
struct roa_table *rot;
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 <ip4> IP4
%token <ip6> IP6
%token <s> SYM
%token <t> TEXT
%type <iface> ipa_scope
%type <i> expr bool pxlen
%type <i32> expr_us
%type <time> datetime
%type <a> ipa ipa_raw
%type <px> prefix
%type <net> net_ip4 net_ip6 net_ip net_or_ipa
%type <net_ptr> net_any
%type <t> text opttext
%nonassoc PREFIX_DUMMY
%left AND OR
%nonassoc '=' '<' '>' '~' GEQ LEQ NEQ PO PC
%left '+' '-'
%left '*' '/' '%'
%left '!'
%nonassoc '.'
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT)
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 */
CF_ADDTO(conf, definition)
definition:
DEFINE SYM '=' term ';' {
struct f_val *val = cfg_alloc(sizeof(struct f_val));
*val = f_eval($4, cfg_mem);
if (val->type == T_RETURN) cf_error("Runtime error");
cf_define_symbol($2, SYM_CONSTANT | val->type, val);
}
;
expr:
NUM
| '(' term ')' { $$ = f_eval_int($2); }
| SYM {
if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number expected");
$$ = SYM_VAL($1).i; }
;
expr_us:
expr S { $$ = (u32) $1 * 1000000; }
| expr MS { $$ = (u32) $1 * 1000; }
| expr US { $$ = (u32) $1 * 1; }
;
/* expr_u16: expr { check_u16($1); $$ = $1; }; */
/* Switches */
bool:
expr {$$ = !!$1; }
| ON { $$ = 1; }
| YES { $$ = 1; }
| OFF { $$ = 0; }
| NO { $$ = 0; }
| /* Silence means agreement */ { $$ = 1; }
;
/* Addresses, prefixes and netmasks */
ipa_raw:
IP4 { $$ = ipa_from_ip4($1); }
| IP6 { $$ = ipa_from_ip6($1); }
;
ipa:
ipa_raw
| SYM {
if ($1->class != (SYM_CONSTANT | T_IP)) cf_error("IP address expected");
$$ = SYM_VAL($1).px.ip;
}
;
ipa_scope:
/* empty */ { $$ = NULL; }
| '%' SYM { $$ = if_get_by_name($2->name); }
;
/* XXXX - symbols and tests */
net_ip4: IP4 pxlen { $$.ip4 = NET_ADDR_IP4($1, $2); }
net_ip6: IP6 pxlen { $$.ip6 = NET_ADDR_IP6($1, $2); }
net_ip: net_ip4 | net_ip6 ;
net_any: net_ip { $$ = cfg_alloc($1.n.length); net_copy($$, &($1.n)); }
net_or_ipa:
net_ip4
| net_ip6
| IP4 { $$.ip4 = NET_ADDR_IP4($1, IP4_MAX_PREFIX_LENGTH); }
| IP6 { $$.ip6 = NET_ADDR_IP6($1, IP6_MAX_PREFIX_LENGTH); }
;
prefix:
ipa pxlen {
if (!ip_is_prefix($1, $2)) cf_error("Invalid prefix");
$$.addr = $1; $$.len = $2;
}
;
pxlen:
'/' expr {
if ($2 < 0 || $2 > BITS_PER_IP_ADDRESS) cf_error("Invalid prefix length %d", $2);
$$ = $2;
}
| ':' ipa {
$$ = ipa_masklen($2);
if ($$ < 0) cf_error("Invalid netmask %I", $2);
}
;
datetime:
TEXT {
$$ = tm_parse_datetime($1);
if (!$$)
cf_error("Invalid date and time");
}
;
text:
TEXT
| SYM {
if ($1->class != (SYM_CONSTANT | T_STRING)) cf_error("String expected");
$$ = SYM_VAL($1).s;
}
;
opttext:
TEXT
| /* empty */ { $$ = NULL; }
;
CF_CODE
CF_END
|
