mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-23 10:11:53 +00:00
5a14df3950
The two-letter instructions were quite messy but they could be easily read from memory dumps. Now GDB (since 2012) supports pretty printing enum values and GCC checks the switch construction for missing enum values so we are converting the nice two-byte values to enums. Anyway, the enum still keeps the old two-byte values to be able to read the instruction codes even without GDB from plain memory dump.
218 lines
3.8 KiB
Plaintext
218 lines
3.8 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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#define PARSER 1
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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_DEFINES
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static void
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check_u16(unsigned val)
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{
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if (val > 0xFFFF)
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cf_error("Value %d out of range (0-65535)", val);
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}
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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 f_dynamic_attr fda;
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struct f_static_attr fsa;
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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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struct roa_show_data *ro;
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struct sym_show_data *sd;
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struct lsadb_show_data *ld;
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struct iface *iface;
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struct roa_table *rot;
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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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struct proto_spec ps;
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struct timeformat *tf;
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}
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%token END CLI_MARKER INVALID_TOKEN ELSECOL DDOT
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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 <iface> ipa_scope
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%type <i> expr bool pxlen
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%type <i32> expr_us
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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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%type <t> text opttext
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%type <t> text_or_none
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%nonassoc PREFIX_DUMMY
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%left AND OR
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%nonassoc '=' '<' '>' '~' GEQ LEQ NEQ NMA PO PC
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%left '+' '-'
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%left '*' '/' '%'
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%left '!'
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%nonassoc '.'
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CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT)
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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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CF_ADDTO(conf, definition)
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definition:
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DEFINE SYM '=' term ';' {
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struct f_val *val = cfg_alloc(sizeof(struct f_val));
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*val = f_eval($4, cfg_mem);
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if (val->type == T_RETURN) cf_error("Runtime error");
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cf_define_symbol($2, SYM_CONSTANT | val->type, val);
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}
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;
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expr:
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NUM
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| '(' term ')' { $$ = f_eval_int($2); }
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| SYM {
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if ($1->class != (SYM_CONSTANT | T_INT)) cf_error("Number expected");
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$$ = SYM_VAL($1).i; }
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;
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expr_us:
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expr S { $$ = (u32) $1 * 1000000; }
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| expr MS { $$ = (u32) $1 * 1000; }
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| expr US { $$ = (u32) $1 * 1; }
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;
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/* expr_u16: expr { check_u16($1); $$ = $1; }; */
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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_CONSTANT | T_IP)) cf_error("IP address expected");
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$$ = SYM_VAL($1).px.ip;
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}
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;
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ipa_scope:
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/* empty */ { $$ = NULL; }
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| '%' SYM { $$ = if_get_by_name($2->name); }
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;
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prefix:
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ipa pxlen {
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if (!ip_is_prefix($1, $2)) cf_error("Invalid prefix");
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$$.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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$$ = ipa_masklen($2);
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if ($$ < 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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text:
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TEXT
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| SYM {
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if ($1->class != (SYM_CONSTANT | T_STRING)) cf_error("String expected");
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$$ = SYM_VAL($1).s;
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}
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;
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opttext:
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TEXT
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| /* empty */ { $$ = NULL; }
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;
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text_or_none:
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TEXT { $$ = $1; }
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| { $$ = NULL; }
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;
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CF_CODE
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CF_END
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