be17805c0b
This patch adds support for source-specific IPv6 routes to BIRD core. This is based on Dean Luga's original patch, with the review comments addressed. SADR support is added to network address parsing in confbase.Y and to the kernel protocol on Linux. Currently there is no way to mix source-specific and non-source-specific routes (i.e., SADR tables cannot be connected to non-SADR tables). Thanks to Toke Hoiland-Jorgensen for the original patch. Minor changes by Ondrej Santiago Zajicek.
361 lines
7.4 KiB
Text
361 lines
7.4 KiB
Text
/*
|
|
* 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(uint val)
|
|
{
|
|
if (val > 0xFFFF)
|
|
cf_error("Value %u out of range (0-65535)", val);
|
|
}
|
|
|
|
CF_DECLS
|
|
|
|
%union {
|
|
uint i;
|
|
u32 i32;
|
|
u64 i64;
|
|
ip_addr a;
|
|
ip4_addr ip4;
|
|
ip6_addr ip6;
|
|
net_addr net;
|
|
net_addr *net_ptr;
|
|
struct symbol *s;
|
|
char *t;
|
|
struct rtable_config *r;
|
|
struct channel_config *cc;
|
|
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 sym_show_data *sd;
|
|
struct lsadb_show_data *ld;
|
|
struct iface *iface;
|
|
void *g;
|
|
btime time;
|
|
struct f_prefix px;
|
|
struct proto_spec ps;
|
|
struct channel_limit cl;
|
|
struct timeformat *tf;
|
|
mpls_label_stack *mls;
|
|
}
|
|
|
|
%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 <i64> VPN_RD
|
|
%token <s> SYM
|
|
%token <t> TEXT
|
|
%type <iface> ipa_scope
|
|
|
|
%type <i> expr bool pxlen4
|
|
%type <time> expr_us time
|
|
%type <a> ipa
|
|
%type <net> net_ip4_ net_ip6_ net_ip6 net_ip_ net_ip net_or_ipa
|
|
%type <net_ptr> net_ net_any net_vpn4_ net_vpn6_ net_vpn_ net_roa4_ net_roa6_ net_roa_ net_ip6_sadr_ net_mpls_
|
|
%type <mls> label_stack_start label_stack
|
|
|
|
%type <t> text opttext
|
|
|
|
%nonassoc PREFIX_DUMMY
|
|
%left AND OR
|
|
%nonassoc '=' '<' '>' '~' GEQ LEQ NEQ NMA PO PC
|
|
%left '+' '-'
|
|
%left '*' '/' '%'
|
|
%left '!'
|
|
%nonassoc '.'
|
|
|
|
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, S, MS, US, PORT, VPN, MPLS, FROM)
|
|
|
|
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 { $$ = $1 S_; }
|
|
| expr MS { $$ = $1 MS_; }
|
|
| expr US { $$ = $1 US_; }
|
|
;
|
|
|
|
/* Switches */
|
|
|
|
bool:
|
|
expr { $$ = !!$1; }
|
|
| ON { $$ = 1; }
|
|
| YES { $$ = 1; }
|
|
| OFF { $$ = 0; }
|
|
| NO { $$ = 0; }
|
|
| /* Silence means agreement */ { $$ = 1; }
|
|
;
|
|
|
|
|
|
/* Addresses */
|
|
|
|
ipa:
|
|
IP4 { $$ = ipa_from_ip4($1); }
|
|
| IP6 { $$ = ipa_from_ip6($1); }
|
|
| SYM {
|
|
if ($1->class != (SYM_CONSTANT | T_IP)) cf_error("IP address expected");
|
|
$$ = SYM_VAL($1).ip;
|
|
}
|
|
;
|
|
|
|
ipa_scope:
|
|
/* empty */ { $$ = NULL; }
|
|
| '%' SYM { $$ = if_get_by_name($2->name); }
|
|
;
|
|
|
|
|
|
/* Networks - internal */
|
|
|
|
pxlen4:
|
|
'/' NUM {
|
|
if ($2 > IP4_MAX_PREFIX_LENGTH) cf_error("Invalid prefix length %u", $2);
|
|
$$ = $2;
|
|
}
|
|
| ':' IP4 {
|
|
$$ = ip4_masklen($2);
|
|
if ($$ == 255) cf_error("Invalid netmask %I4", $2);
|
|
}
|
|
;
|
|
|
|
net_ip4_: IP4 pxlen4
|
|
{
|
|
net_fill_ip4(&($$), $1, $2);
|
|
|
|
net_addr_ip4 *n = (void *) &($$);
|
|
if (!net_validate_ip4(n))
|
|
cf_error("Invalid IPv4 prefix %I4/%d, maybe you wanted %I4/%d",
|
|
n->prefix, n->pxlen, ip4_and(n->prefix, ip4_mkmask(n->pxlen)), n->pxlen);
|
|
};
|
|
|
|
net_ip6_: IP6 '/' NUM
|
|
{
|
|
if ($3 > IP6_MAX_PREFIX_LENGTH)
|
|
cf_error("Invalid prefix length %u", $3);
|
|
|
|
net_fill_ip6(&($$), $1, $3);
|
|
|
|
net_addr_ip6 *n = (void *) &($$);
|
|
if (!net_validate_ip6(n))
|
|
cf_error("Invalid IPv6 prefix %I6/%d, maybe you wanted %I6/%d",
|
|
n->prefix, n->pxlen, ip6_and(n->prefix, ip6_mkmask(n->pxlen)), n->pxlen);
|
|
};
|
|
|
|
net_ip6_sadr_: IP6 '/' NUM FROM IP6 '/' NUM
|
|
{
|
|
if ($3 > IP6_MAX_PREFIX_LENGTH)
|
|
cf_error("Invalid prefix length %u", $3);
|
|
|
|
if ($7 > IP6_MAX_PREFIX_LENGTH)
|
|
cf_error("Invalid prefix length %u", $7);
|
|
|
|
$$ = cfg_alloc(sizeof(net_addr_ip6_sadr));
|
|
net_fill_ip6_sadr($$, $1, $3, $5, $7);
|
|
|
|
net_addr_ip6_sadr *n = (void *) $$;
|
|
if (!net_validate_ip6_sadr(n))
|
|
cf_error("Invalid SADR IPv6 prefix %I6/%d from %I6/%d, maybe you wanted %I6/%d from %I6/%d",
|
|
n->dst_prefix, n->dst_pxlen, n->src_prefix, n->src_pxlen,
|
|
ip6_and(n->dst_prefix, ip6_mkmask(n->dst_pxlen)), n->dst_pxlen,
|
|
ip6_and(n->src_prefix, ip6_mkmask(n->src_pxlen)), n->src_pxlen);
|
|
};
|
|
|
|
net_vpn4_: VPN_RD net_ip4_
|
|
{
|
|
$$ = cfg_alloc(sizeof(net_addr_vpn4));
|
|
net_fill_vpn4($$, net4_prefix(&$2), net4_pxlen(&$2), $1);
|
|
}
|
|
|
|
net_vpn6_: VPN_RD net_ip6_
|
|
{
|
|
$$ = cfg_alloc(sizeof(net_addr_vpn6));
|
|
net_fill_vpn6($$, net6_prefix(&$2), net6_pxlen(&$2), $1);
|
|
}
|
|
|
|
net_roa4_: net_ip4_ MAX NUM AS NUM
|
|
{
|
|
$$ = cfg_alloc(sizeof(net_addr_roa4));
|
|
net_fill_roa4($$, net4_prefix(&$1), net4_pxlen(&$1), $3, $5);
|
|
if ($3 < net4_pxlen(&$1) || $3 > IP4_MAX_PREFIX_LENGTH)
|
|
cf_error("Invalid max prefix length %u", $3);
|
|
};
|
|
|
|
net_roa6_: net_ip6_ MAX NUM AS NUM
|
|
{
|
|
$$ = cfg_alloc(sizeof(net_addr_roa6));
|
|
net_fill_roa6($$, net6_prefix(&$1), net6_pxlen(&$1), $3, $5);
|
|
if ($3 < net6_pxlen(&$1) || $3 > IP6_MAX_PREFIX_LENGTH)
|
|
cf_error("Invalid max prefix length %u", $3);
|
|
};
|
|
|
|
net_mpls_: MPLS NUM
|
|
{
|
|
$$ = cfg_alloc(sizeof(net_addr_roa6));
|
|
net_fill_mpls($$, $2);
|
|
}
|
|
|
|
net_ip_: net_ip4_ | net_ip6_ ;
|
|
net_vpn_: net_vpn4_ | net_vpn6_ ;
|
|
net_roa_: net_roa4_ | net_roa6_ ;
|
|
|
|
net_:
|
|
net_ip_ { $$ = cfg_alloc($1.length); net_copy($$, &($1)); }
|
|
| net_vpn_
|
|
| net_roa_
|
|
| net_flow_
|
|
| net_ip6_sadr_
|
|
| net_mpls_
|
|
;
|
|
|
|
|
|
/* Networks - regular */
|
|
|
|
net_ip6:
|
|
net_ip6_
|
|
| SYM {
|
|
if (($1->class != (SYM_CONSTANT | T_NET)) || (SYM_VAL($1).net->type != NET_IP6))
|
|
cf_error("IPv6 network expected");
|
|
$$ = * SYM_VAL($1).net;
|
|
}
|
|
;
|
|
|
|
net_ip:
|
|
net_ip_
|
|
| SYM {
|
|
if (($1->class != (SYM_CONSTANT | T_NET)) || !net_is_ip(SYM_VAL($1).net))
|
|
cf_error("IP network expected");
|
|
$$ = * SYM_VAL($1).net;
|
|
}
|
|
;
|
|
|
|
net_any:
|
|
net_
|
|
| SYM {
|
|
if ($1->class != (SYM_CONSTANT | T_NET))
|
|
cf_error("Network expected");
|
|
$$ = (net_addr *) SYM_VAL($1).net; /* Avoid const warning */
|
|
}
|
|
;
|
|
|
|
net_or_ipa:
|
|
net_ip4_
|
|
| net_ip6_
|
|
| IP4 { net_fill_ip4(&($$), $1, IP4_MAX_PREFIX_LENGTH); }
|
|
| IP6 { net_fill_ip6(&($$), $1, IP6_MAX_PREFIX_LENGTH); }
|
|
| SYM {
|
|
if ($1->class == (SYM_CONSTANT | T_IP))
|
|
net_fill_ip_host(&($$), SYM_VAL($1).ip);
|
|
else if (($1->class == (SYM_CONSTANT | T_NET)) && net_is_ip(SYM_VAL($1).net))
|
|
$$ = * SYM_VAL($1).net;
|
|
else
|
|
cf_error("IP address or network expected");
|
|
}
|
|
;
|
|
|
|
label_stack_start: NUM
|
|
{
|
|
$$ = cfg_allocz(sizeof(mpls_label_stack));
|
|
$$->len = 1;
|
|
$$->stack[0] = $1;
|
|
};
|
|
|
|
label_stack:
|
|
label_stack_start
|
|
| label_stack '/' NUM {
|
|
if ($1->len >= MPLS_MAX_LABEL_STACK)
|
|
cf_error("Too many labels in stack");
|
|
$1->stack[$1->len++] = $3;
|
|
$$ = $1;
|
|
}
|
|
;
|
|
|
|
time:
|
|
TEXT {
|
|
$$ = tm_parse_time($1);
|
|
if (!$$)
|
|
cf_error("Invalid date/time");
|
|
}
|
|
;
|
|
|
|
text:
|
|
TEXT
|
|
| SYM {
|
|
if ($1->class != (SYM_CONSTANT | T_STRING)) cf_error("String expected");
|
|
$$ = SYM_VAL($1).s;
|
|
}
|
|
;
|
|
|
|
opttext:
|
|
TEXT
|
|
| /* empty */ { $$ = NULL; }
|
|
;
|
|
|
|
|
|
CF_CODE
|
|
|
|
CF_END
|