File: [local] / src / usr.sbin / ldpd / parse.y (download)
Revision 1.72, Fri Oct 15 15:01:28 2021 UTC (2 years, 7 months ago) by naddy
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, HEAD
Changes since 1.71: +8 -8 lines
Don't declare variables as "unsigned char *" that are passed to
functions that take "char *" arguments. Where such chars are
assigned to int or passed to ctype functions, explicitly cast them
to unsigned char.
For OpenBSD's clang, -Wpointer-sign has been disabled by default,
but when the parse.y code was built elsewhere, the compiler would
complain.
With help from millert@
ok benno@ deraadt@
|
/* $OpenBSD: parse.y,v 1.72 2021/10/15 15:01:28 naddy Exp $ */
/*
* Copyright (c) 2013, 2015, 2016 Renato Westphal <renato@openbsd.org>
* Copyright (c) 2004, 2005, 2008 Esben Norby <norby@openbsd.org>
* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
* Copyright (c) 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
* Copyright (c) 2001 Theo de Raadt. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
%{
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <net/if_types.h>
#include <limits.h>
#include <stdio.h>
#include <syslog.h>
#include <errno.h>
#include <netdb.h>
#include "ldpd.h"
#include "ldpe.h"
#include "lde.h"
#include "log.h"
struct file {
TAILQ_ENTRY(file) entry;
FILE *stream;
char *name;
size_t ungetpos;
size_t ungetsize;
u_char *ungetbuf;
int eof_reached;
int lineno;
int errors;
};
TAILQ_HEAD(files, file);
struct sym {
TAILQ_ENTRY(sym) entry;
int used;
int persist;
char *nam;
char *val;
};
TAILQ_HEAD(symhead, sym);
struct config_defaults {
uint16_t keepalive;
uint16_t lhello_holdtime;
uint16_t lhello_interval;
uint16_t thello_holdtime;
uint16_t thello_interval;
union ldpd_addr trans_addr;
int afflags;
uint8_t pwflags;
};
typedef struct {
union {
int64_t number;
char *string;
struct in_addr routerid;
struct ldp_auth *auth;
} v;
int lineno;
} YYSTYPE;
static int yyerror(const char *, ...)
__attribute__((__format__ (printf, 1, 2)))
__attribute__((__nonnull__ (1)));
static int kw_cmp(const void *, const void *);
static int lookup(char *);
static int igetc(void);
static int lgetc(int);
void lungetc(int);
static int findeol(void);
static int yylex(void);
static int check_file_secrecy(int, const char *);
static struct file *pushfile(const char *, int);
static int popfile(void);
static int yyparse(void);
static int symset(const char *, const char *, int);
static char *symget(const char *);
static struct iface *conf_get_if(struct kif *);
static struct tnbr *conf_get_tnbr(union ldpd_addr *);
static struct nbr_params *conf_get_nbrp(struct in_addr);
static struct l2vpn *conf_get_l2vpn(char *);
static struct l2vpn_if *conf_get_l2vpn_if(struct l2vpn *, struct kif *);
static struct l2vpn_pw *conf_get_l2vpn_pw(struct l2vpn *, struct kif *);
int conf_check_rdomain(unsigned int);
static void clear_config(struct ldpd_conf *xconf);
static uint32_t get_rtr_id(void);
static int get_address(const char *, union ldpd_addr *);
static int get_af_address(const char *, int *, union ldpd_addr *);
static int str2key(char *, const char *, int);
static struct file *file, *topfile;
static struct files files = TAILQ_HEAD_INITIALIZER(files);
static struct symhead symhead = TAILQ_HEAD_INITIALIZER(symhead);
static struct ldpd_conf *conf;
static int errors;
static int af;
static struct ldpd_af_conf *af_conf;
static struct iface *iface;
static struct iface_af *ia;
static struct tnbr *tnbr;
static struct nbr_params *nbrp;
static struct l2vpn *l2vpn;
static struct l2vpn_pw *pw;
static struct config_defaults globaldefs;
static struct config_defaults afdefs;
static struct config_defaults ifacedefs;
static struct config_defaults tnbrdefs;
static struct config_defaults pwdefs;
static struct config_defaults *defs;
%}
%token INTERFACE TNEIGHBOR ROUTERID FIBUPDATE RDOMAIN EXPNULL
%token LHELLOHOLDTIME LHELLOINTERVAL
%token THELLOHOLDTIME THELLOINTERVAL
%token THELLOACCEPT AF IPV4 IPV6 INET INET6 GTSMENABLE GTSMHOPS
%token KEEPALIVE TRANSADDRESS TRANSPREFERENCE DSCISCOINTEROP
%token NEIGHBOR
%token TCP MD5SIG PASSWORD KEY
%token L2VPN TYPE VPLS PWTYPE MTU BRIDGE
%token ETHERNET ETHERNETTAGGED STATUSTLV CONTROLWORD
%token PSEUDOWIRE NEIGHBORID NEIGHBORADDR PWID
%token EXTTAG
%token YES NO
%token INCLUDE
%token ERROR
%token <v.string> STRING
%token <v.number> NUMBER
%type <v.number> yesno ldp_af l2vpn_type pw_type
%type <v.string> string
%type <v.routerid> routerid
%type <v.auth> auth tcpmd5 optnbrprefix
%%
grammar : /* empty */
| grammar include '\n'
| grammar '\n'
| grammar conf_main '\n'
| grammar varset '\n'
| grammar af '\n'
| grammar neighbor '\n'
| grammar l2vpn '\n'
| grammar error '\n' { file->errors++; }
;
include : INCLUDE STRING {
struct file *nfile;
if ((nfile = pushfile($2,
!(global.cmd_opts & LDPD_OPT_NOACTION))) == NULL) {
yyerror("failed to include file %s", $2);
free($2);
YYERROR;
}
free($2);
file = nfile;
lungetc('\n');
}
;
string : string STRING {
if (asprintf(&$$, "%s %s", $1, $2) == -1) {
free($1);
free($2);
yyerror("string: asprintf");
YYERROR;
}
free($1);
free($2);
}
| STRING
;
routerid : STRING {
if (!inet_aton($1, &$$)) {
yyerror("%s: error parsing router id", $1);
free($1);
YYERROR;
}
if (bad_addr_v4($$)) {
yyerror("%s: invalid router id", $1);
free($1);
YYERROR;
}
free($1);
break;
}
;
yesno : YES { $$ = 1; }
| NO { $$ = 0; }
;
ldp_af : IPV4 { $$ = AF_INET; }
| IPV6 { $$ = AF_INET6; }
;
l2vpn_type : VPLS { $$ = L2VPN_TYPE_VPLS; }
;
pw_type : ETHERNET { $$ = PW_TYPE_ETHERNET; }
| ETHERNETTAGGED { $$ = PW_TYPE_ETHERNET_TAGGED; }
;
varset : STRING '=' string {
char *s = $1;
if (global.cmd_opts & LDPD_OPT_VERBOSE)
printf("%s = \"%s\"\n", $1, $3);
while (*s++) {
if (isspace((unsigned char)*s)) {
yyerror("macro name cannot contain "
"whitespace");
free($1);
free($3);
YYERROR;
}
}
if (symset($1, $3, 0) == -1)
fatal("cannot store variable");
free($1);
free($3);
}
;
conf_main : ROUTERID routerid {
conf->rtr_id = $2;
}
| FIBUPDATE yesno {
if ($2 == 0)
conf->flags |= F_LDPD_NO_FIB_UPDATE;
else
conf->flags &= ~F_LDPD_NO_FIB_UPDATE;
}
| RDOMAIN NUMBER {
if ($2 < 0 || $2 > RT_TABLEID_MAX) {
yyerror("invalid rdomain");
YYERROR;
}
conf->rdomain = $2;
}
| TRANSPREFERENCE ldp_af {
conf->trans_pref = $2;
switch (conf->trans_pref) {
case AF_INET:
conf->trans_pref = DUAL_STACK_LDPOV4;
break;
case AF_INET6:
conf->trans_pref = DUAL_STACK_LDPOV6;
break;
default:
yyerror("invalid address-family");
YYERROR;
}
}
| DSCISCOINTEROP yesno {
if ($2 == 1)
conf->flags |= F_LDPD_DS_CISCO_INTEROP;
else
conf->flags &= ~F_LDPD_DS_CISCO_INTEROP;
}
| auth {
LIST_INSERT_HEAD(&conf->auth_list, $1, entry);
}
| af_defaults
| iface_defaults
| tnbr_defaults
;
af : AF ldp_af {
af = $2;
switch (af) {
case AF_INET:
af_conf = &conf->ipv4;
break;
case AF_INET6:
af_conf = &conf->ipv6;
break;
default:
yyerror("invalid address-family");
YYERROR;
}
afdefs = *defs;
defs = &afdefs;
} af_block {
af_conf->keepalive = defs->keepalive;
af_conf->thello_holdtime = defs->thello_holdtime;
af_conf->thello_interval = defs->thello_interval;
af_conf->flags = defs->afflags;
af_conf->flags |= F_LDPD_AF_ENABLED;
af_conf = NULL;
af = AF_UNSPEC;
defs = &globaldefs;
}
;
af_block : '{' optnl afopts_l '}'
| '{' optnl '}'
|
;
afopts_l : afopts_l afoptsl nl
| afoptsl optnl
;
afoptsl : TRANSADDRESS STRING {
if (get_address($2, &af_conf->trans_addr) == -1) {
yyerror("error parsing transport-address");
free($2);
YYERROR;
}
free($2);
if (bad_addr(af, &af_conf->trans_addr)) {
yyerror("invalid transport-address");
YYERROR;
}
if (af == AF_INET6 &&
IN6_IS_SCOPE_EMBED(&af_conf->trans_addr.v6)) {
yyerror("ipv6 transport-address can not be "
"link-local");
YYERROR;
}
}
| GTSMENABLE yesno {
if ($2 == 0)
defs->afflags |= F_LDPD_AF_NO_GTSM;
}
| af_defaults
| iface_defaults
| tnbr_defaults
| interface
| tneighbor
;
af_defaults : THELLOACCEPT yesno {
if ($2 == 0)
defs->afflags &= ~F_LDPD_AF_THELLO_ACCEPT;
else
defs->afflags |= F_LDPD_AF_THELLO_ACCEPT;
}
| EXPNULL yesno {
if ($2 == 0)
defs->afflags &= ~F_LDPD_AF_EXPNULL;
else
defs->afflags |= F_LDPD_AF_EXPNULL;
}
| KEEPALIVE NUMBER {
if ($2 < MIN_KEEPALIVE || $2 > MAX_KEEPALIVE) {
yyerror("keepalive out of range (%d-%d)",
MIN_KEEPALIVE, MAX_KEEPALIVE);
YYERROR;
}
defs->keepalive = $2;
}
;
iface_defaults : LHELLOHOLDTIME NUMBER {
if ($2 < MIN_HOLDTIME || $2 > MAX_HOLDTIME) {
yyerror("hello-holdtime out of range (%d-%d)",
MIN_HOLDTIME, MAX_HOLDTIME);
YYERROR;
}
defs->lhello_holdtime = $2;
}
| LHELLOINTERVAL NUMBER {
if ($2 < MIN_HELLO_INTERVAL ||
$2 > MAX_HELLO_INTERVAL) {
yyerror("hello-interval out of range (%d-%d)",
MIN_HELLO_INTERVAL, MAX_HELLO_INTERVAL);
YYERROR;
}
defs->lhello_interval = $2;
}
;
tnbr_defaults : THELLOHOLDTIME NUMBER {
if ($2 < MIN_HOLDTIME || $2 > MAX_HOLDTIME) {
yyerror("hello-holdtime out of range (%d-%d)",
MIN_HOLDTIME, MAX_HOLDTIME);
YYERROR;
}
defs->thello_holdtime = $2;
}
| THELLOINTERVAL NUMBER {
if ($2 < MIN_HELLO_INTERVAL ||
$2 > MAX_HELLO_INTERVAL) {
yyerror("hello-interval out of range (%d-%d)",
MIN_HELLO_INTERVAL, MAX_HELLO_INTERVAL);
YYERROR;
}
defs->thello_interval = $2;
}
;
tcpmd5 : TCP MD5SIG PASSWORD STRING {
size_t len;
$$ = calloc(1, sizeof(*$$));
if ($$ == NULL) {
free($4);
yyerror("unable to allocate md5 key");
YYERROR;
}
len = strlen($4);
if (len > sizeof($$->md5key)) {
free($$);
free($4);
yyerror("tcp md5sig password too long: "
"max %zu", sizeof($$->md5key));
YYERROR;
}
memcpy($$->md5key, $4, len);
$$->md5key_len = len;
free($4);
}
| TCP MD5SIG KEY STRING {
int len;
$$ = calloc(1, sizeof(*$$));
if ($$ == NULL) {
free($4);
yyerror("unable to allocate md5 key");
YYERROR;
}
len = str2key($$->md5key, $4, sizeof($$->md5key));
if (len == -1) {
free($$);
free($4);
yyerror("invalid hex string");
YYERROR;
}
if ((size_t)len > sizeof($$->md5key_len)) {
free($$);
free($4);
yyerror("tcp md5sig key too long: %d "
"max %zu", len, sizeof($$->md5key));
YYERROR;
}
$$->md5key_len = len;
free($4);
}
| NO TCP MD5SIG {
$$ = calloc(1, sizeof(*$$));
if ($$ == NULL) {
yyerror("unable to allocate no md5 key");
YYERROR;
}
$$->md5key_len = 0;
}
;
optnbrprefix : STRING {
$$ = calloc(1, sizeof(*$$));
if ($$ == NULL) {
yyerror("unable to allocate auth");
free($1);
YYERROR;
}
$$->idlen = inet_net_pton(AF_INET, $1,
&$$->id, sizeof($$->id));
if ($$->idlen == -1) {
yyerror("%s: %s", $1, strerror(errno));
free($1);
YYERROR;
}
}
| /* empty */ {
$$ = NULL;
}
;
auth : tcpmd5 optnbrprefix {
$$ = $1;
if ($2 != NULL) {
$$->id = $2->id;
$$->idlen = $2->idlen;
free($2);
} else {
$$->id.s_addr = 0;
$$->idlen = 0;
}
}
;
nbr_opts : KEEPALIVE NUMBER {
if ($2 < MIN_KEEPALIVE || $2 > MAX_KEEPALIVE) {
yyerror("keepalive out of range (%d-%d)",
MIN_KEEPALIVE, MAX_KEEPALIVE);
YYERROR;
}
nbrp->keepalive = $2;
nbrp->flags |= F_NBRP_KEEPALIVE;
}
| tcpmd5 {
/* this is syntactic sugar... */
$1->id = nbrp->lsr_id;
$1->idlen = 32;
LIST_INSERT_HEAD(&conf->auth_list, $1, entry);
}
| GTSMENABLE yesno {
nbrp->flags |= F_NBRP_GTSM;
nbrp->gtsm_enabled = $2;
}
| GTSMHOPS NUMBER {
if ($2 < 1 || $2 > 255) {
yyerror("invalid number of hops %lld", $2);
YYERROR;
}
nbrp->gtsm_hops = $2;
nbrp->flags |= F_NBRP_GTSM_HOPS;
}
;
pw_defaults : STATUSTLV yesno {
if ($2 == 1)
defs->pwflags |= F_PW_STATUSTLV_CONF;
else
defs->pwflags &= ~F_PW_STATUSTLV_CONF;
}
| CONTROLWORD yesno {
if ($2 == 1)
defs->pwflags |= F_PW_CWORD_CONF;
else
defs->pwflags &= ~F_PW_CWORD_CONF;
}
;
pwopts : PWID NUMBER {
if ($2 < MIN_PWID_ID ||
$2 > MAX_PWID_ID) {
yyerror("pw-id out of range (%d-%d)",
MIN_PWID_ID, MAX_PWID_ID);
YYERROR;
}
pw->pwid = $2;
}
| NEIGHBORID routerid {
pw->lsr_id = $2;
}
| NEIGHBORADDR STRING {
int family;
union ldpd_addr addr;
if (get_af_address($2, &family, &addr) == -1) {
yyerror("error parsing neighbor address");
free($2);
YYERROR;
}
free($2);
if (bad_addr(family, &addr)) {
yyerror("invalid neighbor address");
YYERROR;
}
if (family == AF_INET6 &&
IN6_IS_SCOPE_EMBED(&addr.v6)) {
yyerror("neighbor address can not be "
"link-local");
YYERROR;
}
pw->af = family;
pw->addr = addr;
}
| pw_defaults
;
pseudowire : PSEUDOWIRE STRING {
struct kif *kif;
if ((kif = kif_findname($2)) == NULL) {
yyerror("unknown interface %s", $2);
free($2);
YYERROR;
}
free($2);
if (kif->if_type != IFT_MPLSTUNNEL &&
kmpw_find(kif->ifname) == -1) {
yyerror("unsupported interface type on "
"interface %s", kif->ifname);
YYERROR;
}
pw = conf_get_l2vpn_pw(l2vpn, kif);
if (pw == NULL)
YYERROR;
pwdefs = *defs;
defs = &pwdefs;
} pw_block {
struct l2vpn *l;
struct l2vpn_pw *p;
/* check for errors */
if (pw->pwid == 0) {
yyerror("missing pseudowire id");
YYERROR;
}
if (pw->lsr_id.s_addr == INADDR_ANY) {
yyerror("missing pseudowire neighbor-id");
YYERROR;
}
LIST_FOREACH(l, &conf->l2vpn_list, entry) {
LIST_FOREACH(p, &l->pw_list, entry) {
if (pw != p &&
pw->pwid == p->pwid &&
pw->af == p->af &&
pw->lsr_id.s_addr ==
p->lsr_id.s_addr) {
yyerror("pseudowire already "
"configured");
YYERROR;
}
}
}
/*
* If the neighbor address is not specified, use the
* neighbor id.
*/
if (pw->af == AF_UNSPEC) {
pw->af = AF_INET;
pw->addr.v4 = pw->lsr_id;
}
pw->flags = defs->pwflags;
pw = NULL;
defs = &globaldefs;
}
;
pw_block : '{' optnl pwopts_l '}'
| '{' optnl '}'
| /* nothing */
;
pwopts_l : pwopts_l pwopts nl
| pwopts optnl
;
l2vpnopts : PWTYPE pw_type {
l2vpn->pw_type = $2;
}
| MTU NUMBER {
if ($2 < MIN_L2VPN_MTU ||
$2 > MAX_L2VPN_MTU) {
yyerror("l2vpn mtu out of range (%d-%d)",
MIN_L2VPN_MTU, MAX_L2VPN_MTU);
YYERROR;
}
l2vpn->mtu = $2;
}
| pw_defaults
| BRIDGE STRING {
struct l2vpn *l;
struct kif *kif;
if ((kif = kif_findname($2)) == NULL) {
yyerror("unknown interface %s", $2);
free($2);
YYERROR;
}
free($2);
if (l2vpn->br_ifindex != 0) {
yyerror("bridge interface cannot be "
"redefined on l2vpn %s", l2vpn->name);
YYERROR;
}
if (kif->if_type != IFT_BRIDGE) {
yyerror("unsupported interface type on "
"interface %s", kif->ifname);
YYERROR;
}
LIST_FOREACH(l, &conf->l2vpn_list, entry) {
if (l->br_ifindex == kif->ifindex) {
yyerror("bridge %s is already being "
"used by l2vpn %s", kif->ifname,
l->name);
YYERROR;
}
}
l2vpn->br_ifindex = kif->ifindex;
strlcpy(l2vpn->br_ifname, kif->ifname,
sizeof(l2vpn->br_ifname));
}
| INTERFACE STRING {
struct kif *kif;
struct l2vpn_if *lif;
if ((kif = kif_findname($2)) == NULL) {
yyerror("unknown interface %s", $2);
free($2);
YYERROR;
}
free($2);
lif = conf_get_l2vpn_if(l2vpn, kif);
if (lif == NULL)
YYERROR;
}
| pseudowire
;
optnl : '\n' optnl
|
;
nl : '\n' optnl /* one newline or more */
;
interface : INTERFACE STRING {
struct kif *kif;
if ((kif = kif_findname($2)) == NULL) {
yyerror("unknown interface %s", $2);
free($2);
YYERROR;
}
free($2);
iface = conf_get_if(kif);
if (iface == NULL)
YYERROR;
ia = iface_af_get(iface, af);
if (ia->enabled) {
yyerror("interface %s already configured for "
"address-family %s", kif->ifname,
af_name(af));
YYERROR;
}
ia->enabled = 1;
ifacedefs = *defs;
defs = &ifacedefs;
} interface_block {
ia->hello_holdtime = defs->lhello_holdtime;
ia->hello_interval = defs->lhello_interval;
iface = NULL;
defs = &afdefs;
}
;
interface_block : '{' optnl interfaceopts_l '}'
| '{' optnl '}'
| /* nothing */
;
interfaceopts_l : interfaceopts_l iface_defaults nl
| iface_defaults optnl
;
tneighbor : TNEIGHBOR STRING {
union ldpd_addr addr;
if (get_address($2, &addr) == -1) {
yyerror("error parsing targeted-neighbor "
"address");
free($2);
YYERROR;
}
free($2);
if (bad_addr(af, &addr)) {
yyerror("invalid targeted-neighbor address");
YYERROR;
}
if (af == AF_INET6 &&
IN6_IS_SCOPE_EMBED(&addr.v6)) {
yyerror("targeted-neighbor address can not be "
"link-local");
YYERROR;
}
tnbr = conf_get_tnbr(&addr);
if (tnbr == NULL)
YYERROR;
tnbrdefs = *defs;
defs = &tnbrdefs;
} tneighbor_block {
tnbr->hello_holdtime = defs->thello_holdtime;
tnbr->hello_interval = defs->thello_interval;
tnbr = NULL;
defs = &afdefs;
}
;
tneighbor_block : '{' optnl tneighboropts_l '}'
| '{' optnl '}'
| /* nothing */
;
tneighboropts_l : tneighboropts_l tnbr_defaults nl
| tnbr_defaults optnl
;
neighbor : NEIGHBOR routerid {
nbrp = conf_get_nbrp($2);
if (nbrp == NULL)
YYERROR;
} neighbor_block {
nbrp = NULL;
}
;
neighbor_block : '{' optnl neighboropts_l '}'
| '{' optnl '}'
| /* nothing */
;
neighboropts_l : neighboropts_l nbr_opts nl
| nbr_opts optnl
;
l2vpn : L2VPN STRING TYPE l2vpn_type {
l2vpn = conf_get_l2vpn($2);
if (l2vpn == NULL)
YYERROR;
l2vpn->type = $4;
} l2vpn_block {
l2vpn = NULL;
}
;
l2vpn_block : '{' optnl l2vpnopts_l '}'
| '{' optnl '}'
| /* nothing */
;
l2vpnopts_l : l2vpnopts_l l2vpnopts nl
| l2vpnopts optnl
;
%%
struct keywords {
const char *k_name;
int k_val;
};
static int
yyerror(const char *fmt, ...)
{
va_list ap;
char *msg;
file->errors++;
va_start(ap, fmt);
if (vasprintf(&msg, fmt, ap) == -1)
fatalx("yyerror vasprintf");
va_end(ap);
logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
free(msg);
return (0);
}
static int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
static int
lookup(char *s)
{
/* this has to be sorted always */
static const struct keywords keywords[] = {
{"address-family", AF},
{"bridge", BRIDGE},
{"control-word", CONTROLWORD},
{"ds-cisco-interop", DSCISCOINTEROP},
{"ethernet", ETHERNET},
{"ethernet-tagged", ETHERNETTAGGED},
{"explicit-null", EXPNULL},
{"fib-update", FIBUPDATE},
{"gtsm-enable", GTSMENABLE},
{"gtsm-hops", GTSMHOPS},
{"include", INCLUDE},
{"inet", INET},
{"inet6", INET6},
{"interface", INTERFACE},
{"ipv4", IPV4},
{"ipv6", IPV6},
{"keepalive", KEEPALIVE},
{"key", KEY},
{"l2vpn", L2VPN},
{"link-hello-holdtime", LHELLOHOLDTIME},
{"link-hello-interval", LHELLOINTERVAL},
{"md5sig", MD5SIG},
{"mtu", MTU},
{"neighbor", NEIGHBOR},
{"neighbor-addr", NEIGHBORADDR},
{"neighbor-id", NEIGHBORID},
{"no", NO},
{"password", PASSWORD},
{"pseudowire", PSEUDOWIRE},
{"pw-id", PWID},
{"pw-type", PWTYPE},
{"rdomain", RDOMAIN},
{"router-id", ROUTERID},
{"status-tlv", STATUSTLV},
{"targeted-hello-accept", THELLOACCEPT},
{"targeted-hello-holdtime", THELLOHOLDTIME},
{"targeted-hello-interval", THELLOINTERVAL},
{"targeted-neighbor", TNEIGHBOR},
{"tcp", TCP},
{"transport-address", TRANSADDRESS},
{"transport-preference", TRANSPREFERENCE},
{"type", TYPE},
{"vpls", VPLS},
{"yes", YES}
};
const struct keywords *p;
p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
sizeof(keywords[0]), kw_cmp);
if (p)
return (p->k_val);
else
return (STRING);
}
#define START_EXPAND 1
#define DONE_EXPAND 2
static int expanding;
int
igetc(void)
{
int c;
while (1) {
if (file->ungetpos > 0)
c = file->ungetbuf[--file->ungetpos];
else
c = getc(file->stream);
if (c == START_EXPAND)
expanding = 1;
else if (c == DONE_EXPAND)
expanding = 0;
else
break;
}
return (c);
}
static int
lgetc(int quotec)
{
int c, next;
if (quotec) {
if ((c = igetc()) == EOF) {
yyerror("reached end of file while parsing "
"quoted string");
if (file == topfile || popfile() == EOF)
return (EOF);
return (quotec);
}
return (c);
}
while ((c = igetc()) == '\\') {
next = igetc();
if (next != '\n') {
c = next;
break;
}
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF) {
/*
* Fake EOL when hit EOF for the first time. This gets line
* count right if last line in included file is syntactically
* invalid and has no newline.
*/
if (file->eof_reached == 0) {
file->eof_reached = 1;
return ('\n');
}
while (c == EOF) {
if (file == topfile || popfile() == EOF)
return (EOF);
c = igetc();
}
}
return (c);
}
void
lungetc(int c)
{
if (c == EOF)
return;
if (file->ungetpos >= file->ungetsize) {
void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
if (p == NULL)
err(1, "%s", __func__);
file->ungetbuf = p;
file->ungetsize *= 2;
}
file->ungetbuf[file->ungetpos++] = c;
}
static int
findeol(void)
{
int c;
/* skip to either EOF or the first real EOL */
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
static int
yylex(void)
{
char buf[8096];
char *p, *val;
int quotec, next, c;
int token;
top:
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
; /* nothing */
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
; /* nothing */
if (c == '$' && !expanding) {
while (1) {
if ((c = lgetc(0)) == EOF)
return (0);
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
if (isalnum(c) || c == '_') {
*p++ = c;
continue;
}
*p = '\0';
lungetc(c);
break;
}
val = symget(buf);
if (val == NULL) {
yyerror("macro '%s' not defined", buf);
return (findeol());
}
p = val + strlen(val) - 1;
lungetc(DONE_EXPAND);
while (p >= val) {
lungetc((unsigned char)*p);
p--;
}
lungetc(START_EXPAND);
goto top;
}
switch (c) {
case '\'':
case '"':
quotec = c;
while (1) {
if ((c = lgetc(quotec)) == EOF)
return (0);
if (c == '\n') {
file->lineno++;
continue;
} else if (c == '\\') {
if ((next = lgetc(quotec)) == EOF)
return (0);
if (next == quotec || next == ' ' ||
next == '\t')
c = next;
else if (next == '\n') {
file->lineno++;
continue;
} else
lungetc(next);
} else if (c == quotec) {
*p = '\0';
break;
} else if (c == '\0') {
yyerror("syntax error");
return (findeol());
}
if (p + 1 >= buf + sizeof(buf) - 1) {
yyerror("string too long");
return (findeol());
}
*p++ = c;
}
yylval.v.string = strdup(buf);
if (yylval.v.string == NULL)
err(1, "%s", __func__);
return (STRING);
}
#define allowed_to_end_number(x) \
(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
if (c == '-' || isdigit(c)) {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && isdigit(c));
lungetc(c);
if (p == buf + 1 && buf[0] == '-')
goto nodigits;
if (c == EOF || allowed_to_end_number(c)) {
const char *errstr = NULL;
*p = '\0';
yylval.v.number = strtonum(buf, LLONG_MIN,
LLONG_MAX, &errstr);
if (errstr) {
yyerror("\"%s\" invalid number: %s",
buf, errstr);
return (findeol());
}
return (NUMBER);
} else {
nodigits:
while (p > buf + 1)
lungetc((unsigned char)*--p);
c = (unsigned char)*--p;
if (c == '-')
return (c);
}
}
#define allowed_in_string(x) \
(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
x != '{' && x != '}' && \
x != '!' && x != '=' && x != '#' && \
x != ','))
if (isalnum(c) || c == ':' || c == '_') {
do {
*p++ = c;
if ((size_t)(p-buf) >= sizeof(buf)) {
yyerror("string too long");
return (findeol());
}
} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
lungetc(c);
*p = '\0';
if ((token = lookup(buf)) == STRING)
if ((yylval.v.string = strdup(buf)) == NULL)
err(1, "%s", __func__);
return (token);
}
if (c == '\n') {
yylval.lineno = file->lineno;
file->lineno++;
}
if (c == EOF)
return (0);
return (c);
}
static int
check_file_secrecy(int fd, const char *fname)
{
struct stat st;
if (fstat(fd, &st)) {
log_warn("cannot stat %s", fname);
return (-1);
}
if (st.st_uid != 0 && st.st_uid != getuid()) {
log_warnx("%s: owner not root or current user", fname);
return (-1);
}
if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
log_warnx("%s: group writable or world read/writable", fname);
return (-1);
}
return (0);
}
static struct file *
pushfile(const char *name, int secret)
{
struct file *nfile;
if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
log_warn("%s", __func__);
return (NULL);
}
if ((nfile->name = strdup(name)) == NULL) {
log_warn("%s", __func__);
free(nfile);
return (NULL);
}
if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
log_warn("%s: %s", __func__, nfile->name);
free(nfile->name);
free(nfile);
return (NULL);
} else if (secret &&
check_file_secrecy(fileno(nfile->stream), nfile->name)) {
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
nfile->ungetsize = 16;
nfile->ungetbuf = malloc(nfile->ungetsize);
if (nfile->ungetbuf == NULL) {
log_warn("%s", __func__);
fclose(nfile->stream);
free(nfile->name);
free(nfile);
return (NULL);
}
TAILQ_INSERT_TAIL(&files, nfile, entry);
return (nfile);
}
static int
popfile(void)
{
struct file *prev;
if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
prev->errors += file->errors;
TAILQ_REMOVE(&files, file, entry);
fclose(file->stream);
free(file->name);
free(file->ungetbuf);
free(file);
file = prev;
return (file ? 0 : EOF);
}
struct ldpd_conf *
parse_config(char *filename)
{
struct sym *sym, *next;
conf = config_new_empty();
conf->rdomain = 0;
conf->trans_pref = DUAL_STACK_LDPOV6;
defs = &globaldefs;
defs->keepalive = DEFAULT_KEEPALIVE;
defs->lhello_holdtime = LINK_DFLT_HOLDTIME;
defs->lhello_interval = DEFAULT_HELLO_INTERVAL;
defs->thello_holdtime = TARGETED_DFLT_HOLDTIME;
defs->thello_interval = DEFAULT_HELLO_INTERVAL;
defs->pwflags = F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF;
if ((file = pushfile(filename,
!(global.cmd_opts & LDPD_OPT_NOACTION))) == NULL) {
free(conf);
return (NULL);
}
topfile = file;
yyparse();
errors = file->errors;
popfile();
/* Free macros and check which have not been used. */
TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
if ((global.cmd_opts & LDPD_OPT_VERBOSE2) && !sym->used)
fprintf(stderr, "warning: macro '%s' not "
"used\n", sym->nam);
if (!sym->persist) {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
/* check that all interfaces belong to the configured rdomain */
errors += conf_check_rdomain(conf->rdomain);
/* free global config defaults */
if (errors) {
clear_config(conf);
return (NULL);
}
if (conf->rtr_id.s_addr == INADDR_ANY)
conf->rtr_id.s_addr = get_rtr_id();
/* if the ipv4 transport-address is not set, use the router-id */
if ((conf->ipv4.flags & F_LDPD_AF_ENABLED) &&
conf->ipv4.trans_addr.v4.s_addr == INADDR_ANY)
conf->ipv4.trans_addr.v4 = conf->rtr_id;
return (conf);
}
static int
symset(const char *nam, const char *val, int persist)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0)
break;
}
if (sym != NULL) {
if (sym->persist == 1)
return (0);
else {
free(sym->nam);
free(sym->val);
TAILQ_REMOVE(&symhead, sym, entry);
free(sym);
}
}
if ((sym = calloc(1, sizeof(*sym))) == NULL)
return (-1);
sym->nam = strdup(nam);
if (sym->nam == NULL) {
free(sym);
return (-1);
}
sym->val = strdup(val);
if (sym->val == NULL) {
free(sym->nam);
free(sym);
return (-1);
}
sym->used = 0;
sym->persist = persist;
TAILQ_INSERT_TAIL(&symhead, sym, entry);
return (0);
}
int
cmdline_symset(char *s)
{
char *sym, *val;
int ret;
if ((val = strrchr(s, '=')) == NULL)
return (-1);
sym = strndup(s, val - s);
if (sym == NULL)
errx(1, "%s: strndup", __func__);
ret = symset(sym, val + 1, 1);
free(sym);
return (ret);
}
static char *
symget(const char *nam)
{
struct sym *sym;
TAILQ_FOREACH(sym, &symhead, entry) {
if (strcmp(nam, sym->nam) == 0) {
sym->used = 1;
return (sym->val);
}
}
return (NULL);
}
static struct iface *
conf_get_if(struct kif *kif)
{
struct iface *i;
struct l2vpn *l;
if (kif->if_type == IFT_LOOP ||
kif->if_type == IFT_CARP ||
kif->if_type == IFT_BRIDGE ||
kif->if_type == IFT_MPLSTUNNEL) {
yyerror("unsupported interface type on interface %s",
kif->ifname);
return (NULL);
}
LIST_FOREACH(l, &conf->l2vpn_list, entry)
if (l2vpn_if_find(l, kif->ifindex)) {
yyerror("interface %s already configured under "
"l2vpn %s", kif->ifname, l->name);
return (NULL);
}
LIST_FOREACH(i, &conf->iface_list, entry)
if (i->ifindex == kif->ifindex)
return (i);
i = if_new(kif);
LIST_INSERT_HEAD(&conf->iface_list, i, entry);
return (i);
}
static struct tnbr *
conf_get_tnbr(union ldpd_addr *addr)
{
struct tnbr *t;
t = tnbr_find(conf, af, addr);
if (t) {
yyerror("targeted neighbor %s already configured",
log_addr(af, addr));
return (NULL);
}
t = tnbr_new(conf, af, addr);
t->flags |= F_TNBR_CONFIGURED;
LIST_INSERT_HEAD(&conf->tnbr_list, t, entry);
return (t);
}
static struct nbr_params *
conf_get_nbrp(struct in_addr lsr_id)
{
struct nbr_params *n;
LIST_FOREACH(n, &conf->nbrp_list, entry) {
if (n->lsr_id.s_addr == lsr_id.s_addr) {
yyerror("neighbor %s already configured",
inet_ntoa(lsr_id));
return (NULL);
}
}
n = nbr_params_new(lsr_id);
LIST_INSERT_HEAD(&conf->nbrp_list, n, entry);
return (n);
}
static struct l2vpn *
conf_get_l2vpn(char *name)
{
struct l2vpn *l;
if (l2vpn_find(conf, name)) {
yyerror("l2vpn %s already configured", name);
return (NULL);
}
l = l2vpn_new(name);
LIST_INSERT_HEAD(&conf->l2vpn_list, l, entry);
return (l);
}
static struct l2vpn_if *
conf_get_l2vpn_if(struct l2vpn *l, struct kif *kif)
{
struct iface *i;
struct l2vpn *ltmp;
struct l2vpn_if *f;
if (kif->if_type == IFT_LOOP ||
kif->if_type == IFT_CARP ||
kif->if_type == IFT_BRIDGE ||
kif->if_type == IFT_MPLSTUNNEL) {
yyerror("unsupported interface type on interface %s",
kif->ifname);
return (NULL);
}
LIST_FOREACH(ltmp, &conf->l2vpn_list, entry)
if (l2vpn_if_find(ltmp, kif->ifindex)) {
yyerror("interface %s already configured under "
"l2vpn %s", kif->ifname, ltmp->name);
return (NULL);
}
LIST_FOREACH(i, &conf->iface_list, entry) {
if (i->ifindex == kif->ifindex) {
yyerror("interface %s already configured",
kif->ifname);
return (NULL);
}
}
f = l2vpn_if_new(l, kif);
LIST_INSERT_HEAD(&l2vpn->if_list, f, entry);
return (f);
}
static struct l2vpn_pw *
conf_get_l2vpn_pw(struct l2vpn *l, struct kif *kif)
{
struct l2vpn *ltmp;
struct l2vpn_pw *p;
LIST_FOREACH(ltmp, &conf->l2vpn_list, entry) {
if (l2vpn_pw_find(ltmp, kif->ifindex)) {
yyerror("pseudowire %s is already being "
"used by l2vpn %s", kif->ifname, ltmp->name);
return (NULL);
}
}
p = l2vpn_pw_new(l, kif);
LIST_INSERT_HEAD(&l2vpn->pw_list, p, entry);
return (p);
}
int
conf_check_rdomain(unsigned int rdomain)
{
struct iface *i;
int errs = 0;
LIST_FOREACH(i, &conf->iface_list, entry) {
if (i->rdomain != rdomain) {
logit(LOG_CRIT, "interface %s not in rdomain %u",
i->name, rdomain);
errs++;
}
}
return (errs);
}
static void
clear_config(struct ldpd_conf *xconf)
{
struct iface *i;
struct tnbr *t;
struct nbr_params *n;
struct l2vpn *l;
struct l2vpn_if *f;
struct l2vpn_pw *p;
while ((i = LIST_FIRST(&xconf->iface_list)) != NULL) {
LIST_REMOVE(i, entry);
free(i);
}
while ((t = LIST_FIRST(&xconf->tnbr_list)) != NULL) {
LIST_REMOVE(t, entry);
free(t);
}
while ((n = LIST_FIRST(&xconf->nbrp_list)) != NULL) {
LIST_REMOVE(n, entry);
free(n);
}
while ((l = LIST_FIRST(&xconf->l2vpn_list)) != NULL) {
while ((f = LIST_FIRST(&l->if_list)) != NULL) {
LIST_REMOVE(f, entry);
free(f);
}
while ((p = LIST_FIRST(&l->pw_list)) != NULL) {
LIST_REMOVE(p, entry);
free(p);
}
LIST_REMOVE(l, entry);
free(l);
}
free(xconf);
}
static uint32_t
get_rtr_id(void)
{
struct ifaddrs *ifap, *ifa;
uint32_t ip = 0, cur, localnet;
localnet = htonl(INADDR_LOOPBACK & IN_CLASSA_NET);
if (getifaddrs(&ifap) == -1) {
log_warn("getifaddrs");
return (0);
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (strncmp(ifa->ifa_name, "carp", 4) == 0)
continue;
if (ifa->ifa_addr->sa_family != AF_INET)
continue;
cur = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
if ((cur & localnet) == localnet) /* skip 127/8 */
continue;
if (ntohl(cur) < ntohl(ip) || ip == 0)
ip = cur;
}
freeifaddrs(ifap);
return (ip);
}
static int
get_address(const char *s, union ldpd_addr *addr)
{
switch (af) {
case AF_INET:
if (inet_pton(AF_INET, s, &addr->v4) != 1)
return (-1);
break;
case AF_INET6:
if (inet_pton(AF_INET6, s, &addr->v6) != 1)
return (-1);
break;
default:
return (-1);
}
return (0);
}
static int
get_af_address(const char *s, int *family, union ldpd_addr *addr)
{
if (inet_pton(AF_INET, s, &addr->v4) == 1) {
*family = AF_INET;
return (0);
}
if (inet_pton(AF_INET6, s, &addr->v6) == 1) {
*family = AF_INET6;
return (0);
}
return (-1);
}
static int
hexchar(int ch)
{
if (ch >= '0' && ch <= '9')
return (ch - '0');
if (ch >= 'a' && ch <= 'f')
return (ch - 'a');
if (ch >= 'A' && ch <= 'F')
return (ch - 'A');
return (-1);
}
static int
str2key(char *dst, const char *src, int dstlen)
{
int i = 0;
int digit;
while (*src != '\0') {
digit = hexchar(*src);
if (digit == -1)
return (-1);
if (i < dstlen)
*dst = digit << 4;
src++;
if (*src == '\0')
return (-1);
digit = hexchar(*src);
if (digit == -1)
return (-1);
if (i < dstlen)
*dst |= digit;
src++;
i++;
}
return (i);
}
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