%{
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <net/route.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <unistd.h>
#include <ifaddrs.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include "ospf.h"
#include "ospfd.h"
#include "ospfe.h"
#include "log.h"
TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
static 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;
} *file, *topfile;
struct file *pushfile(const char *, int);
int popfile(void);
int check_file_secrecy(int, const char *);
int yyparse(void);
int yylex(void);
int yyerror(const char *, ...)
__attribute__((__format__ (printf, 1, 2)))
__attribute__((__nonnull__ (1)));
int kw_cmp(const void *, const void *);
int lookup(char *);
int igetc(void);
int lgetc(int);
void lungetc(int);
int findeol(void);
TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
struct sym {
TAILQ_ENTRY(sym) entry;
int used;
int persist;
char *nam;
char *val;
};
int symset(const char *, const char *, int);
char *symget(const char *);
void clear_config(struct ospfd_conf *xconf);
int host(const char *, struct in_addr *, struct in_addr *);
static struct ospfd_conf *conf;
static int errors = 0;
struct area *area = NULL;
struct iface *iface = NULL;
struct config_defaults {
char auth_key[MAX_SIMPLE_AUTH_LEN];
struct auth_md_head md_list;
u_int32_t dead_interval;
u_int32_t fast_hello_interval;
u_int16_t transmit_delay;
u_int16_t hello_interval;
u_int16_t rxmt_interval;
u_int16_t metric;
enum auth_type auth_type;
u_int8_t auth_keyid;
u_int8_t priority;
u_int8_t p2p;
};
struct config_defaults globaldefs;
struct config_defaults areadefs;
struct config_defaults ifacedefs;
struct config_defaults *defs;
struct area *conf_get_area(struct in_addr);
struct iface *conf_get_if(struct kif *, struct kif_addr *);
int conf_check_rdomain(unsigned int);
typedef struct {
union {
int64_t number;
char *string;
struct redistribute *redist;
struct in_addr id;
} v;
int lineno;
} YYSTYPE;
%}
%token AREA INTERFACE ROUTERID FIBPRIORITY FIBUPDATE REDISTRIBUTE RTLABEL
%token RDOMAIN RFC1583COMPAT STUB ROUTER SPFDELAY SPFHOLDTIME EXTTAG
%token AUTHKEY AUTHTYPE AUTHMD AUTHMDKEYID
%token METRIC P2P PASSIVE
%token HELLOINTERVAL FASTHELLOINTERVAL TRANSMITDELAY
%token RETRANSMITINTERVAL ROUTERDEADTIME ROUTERPRIORITY
%token SET TYPE
%token YES NO
%token MSEC MINIMAL
%token DEMOTE
%token INCLUDE
%token ERROR
%token DEPEND ON
%token <v.string> STRING
%token <v.number> NUMBER
%type <v.number> yesno no optlist optlist_l option demotecount msec
%type <v.number> deadtime
%type <v.string> string dependon dependonopt
%type <v.redist> redistribute
%type <v.id> areaid
%%
grammar :
| grammar include '\n'
| grammar '\n'
| grammar conf_main '\n'
| grammar varset '\n'
| grammar area '\n'
| grammar error '\n' { file->errors++; }
;
include : INCLUDE STRING {
struct file *nfile;
if ((nfile = pushfile($2,
!(conf->opts & OSPFD_OPT_NOACTION))) == NULL) {
yyerror("failed to include file %s", $2);
free($2);
YYERROR;
}
free($2);
file = nfile;
lungetc('\n');
}
;
string : string STRING {
if (asprintf(&$$, "%s %s", $1, $2) == -1) {
free($1);
free($2);
yyerror("string: asprintf");
YYERROR;
}
free($1);
free($2);
}
| STRING
;
yesno : YES { $$ = 1; }
| NO { $$ = 0; }
;
no : { $$ = 0; }
| NO { $$ = 1; }
;
msec : MSEC NUMBER {
$$ = $2;
}
| NUMBER {
$$ = $1 * 1000;
}
;
varset : STRING '=' string {
char *s = $1;
if (conf->opts & OSPFD_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 STRING {
if (inet_pton(AF_INET, $2, &conf->rtr_id) != 1) {
yyerror("error parsing router-id");
free($2);
YYERROR;
}
free($2);
}
| FIBPRIORITY NUMBER {
if ($2 <= RTP_NONE || $2 > RTP_MAX) {
yyerror("invalid fib-priority");
YYERROR;
}
conf->fib_priority = $2;
}
| FIBUPDATE yesno {
if ($2 == 0)
conf->flags |= OSPFD_FLAG_NO_FIB_UPDATE;
else
conf->flags &= ~OSPFD_FLAG_NO_FIB_UPDATE;
}
| redistribute {
SIMPLEQ_INSERT_TAIL(&conf->redist_list, $1, entry);
conf->redistribute = 1;
}
| RTLABEL STRING EXTTAG NUMBER {
if ($4 < 0 || $4 > UINT_MAX) {
yyerror("invalid external route tag");
free($2);
YYERROR;
}
rtlabel_tag(rtlabel_name2id($2), $4);
free($2);
}
| RDOMAIN NUMBER {
if ($2 < 0 || $2 > RT_TABLEID_MAX) {
yyerror("invalid rdomain");
YYERROR;
}
conf->rdomain = $2;
}
| RFC1583COMPAT yesno {
conf->rfc1583compat = $2;
}
| SPFDELAY msec {
if ($2 < MIN_SPF_DELAY || $2 > MAX_SPF_DELAY) {
yyerror("spf-delay out of range "
"(%d-%d)", MIN_SPF_DELAY,
MAX_SPF_DELAY);
YYERROR;
}
conf->spf_delay = $2;
}
| SPFHOLDTIME msec {
if ($2 < MIN_SPF_HOLDTIME || $2 > MAX_SPF_HOLDTIME) {
yyerror("spf-holdtime out of range "
"(%d-%d)", MIN_SPF_HOLDTIME,
MAX_SPF_HOLDTIME);
YYERROR;
}
conf->spf_hold_time = $2;
}
| STUB ROUTER yesno {
if ($3)
conf->flags |= OSPFD_FLAG_STUB_ROUTER;
else
conf->flags &= ~OSPFD_FLAG_STUB_ROUTER;
}
| defaults
;
redistribute : no REDISTRIBUTE NUMBER '/' NUMBER optlist dependonopt {
struct redistribute *r;
if ((r = calloc(1, sizeof(*r))) == NULL)
fatal(NULL);
r->type = REDIST_ADDR;
if ($3 < 0 || $3 > 255 || $5 < 1 || $5 > 32) {
yyerror("bad network: %llu/%llu", $3, $5);
free(r);
YYERROR;
}
r->addr.s_addr = htonl($3 << IN_CLASSA_NSHIFT);
r->mask.s_addr = prefixlen2mask($5);
if ($1)
r->type |= REDIST_NO;
else
conf->redist_label_or_prefix = 1;
r->metric = $6;
if ($7)
strlcpy(r->dependon, $7, sizeof(r->dependon));
else
r->dependon[0] = '\0';
free($7);
$$ = r;
}
| no REDISTRIBUTE STRING optlist dependonopt {
struct redistribute *r;
if ((r = calloc(1, sizeof(*r))) == NULL)
fatal(NULL);
if (!strcmp($3, "default"))
r->type = REDIST_DEFAULT;
else if (!strcmp($3, "static"))
r->type = REDIST_STATIC;
else if (!strcmp($3, "connected"))
r->type = REDIST_CONNECTED;
else if (host($3, &r->addr, &r->mask)) {
r->type = REDIST_ADDR;
conf->redist_label_or_prefix = !$1;
} else {
yyerror("unknown redistribute type");
free($3);
free(r);
YYERROR;
}
if ($1)
r->type |= REDIST_NO;
r->metric = $4;
if ($5)
strlcpy(r->dependon, $5, sizeof(r->dependon));
else
r->dependon[0] = '\0';
free($3);
free($5);
$$ = r;
}
| no REDISTRIBUTE RTLABEL STRING optlist dependonopt {
struct redistribute *r;
if ((r = calloc(1, sizeof(*r))) == NULL)
fatal(NULL);
r->type = REDIST_LABEL;
r->label = rtlabel_name2id($4);
if ($1)
r->type |= REDIST_NO;
else
conf->redist_label_or_prefix = 1;
r->metric = $5;
if ($6)
strlcpy(r->dependon, $6, sizeof(r->dependon));
else
r->dependon[0] = '\0';
free($4);
free($6);
$$ = r;
}
;
optlist : { $$ = DEFAULT_REDIST_METRIC; }
| SET option {
$$ = $2;
if (($$ & LSA_METRIC_MASK) == 0)
$$ |= DEFAULT_REDIST_METRIC;
}
| SET optnl '{' optnl optlist_l optnl '}' {
$$ = $5;
if (($$ & LSA_METRIC_MASK) == 0)
$$ |= DEFAULT_REDIST_METRIC;
}
;
optlist_l : optlist_l comma option {
if ($1 & LSA_ASEXT_E_FLAG && $3 & LSA_ASEXT_E_FLAG) {
yyerror("redistribute type already defined");
YYERROR;
}
if ($1 & LSA_METRIC_MASK && $3 & LSA_METRIC_MASK) {
yyerror("redistribute metric already defined");
YYERROR;
}
$$ = $1 | $3;
}
| option { $$ = $1; }
;
option : METRIC NUMBER {
if ($2 == 0 || $2 > MAX_METRIC) {
yyerror("invalid redistribute metric");
YYERROR;
}
$$ = $2;
}
| TYPE NUMBER {
switch ($2) {
case 1:
$$ = 0;
break;
case 2:
$$ = LSA_ASEXT_E_FLAG;
break;
default:
yyerror("only external type 1 and 2 allowed");
YYERROR;
}
}
;
dependonopt : { $$ = NULL; }
| dependon
dependon : DEPEND ON STRING {
struct in_addr addr;
struct kif *kif;
if (strlen($3) >= IFNAMSIZ) {
yyerror("interface name %s too long", $3);
free($3);
YYERROR;
}
bzero(&addr, sizeof(addr));
if ((kif = kif_findname($3, addr, NULL)) == NULL) {
yyerror("unknown interface %s", $3);
free($3);
YYERROR;
}
$$ = $3;
}
;
authmd : AUTHMD NUMBER STRING {
if ($2 < MIN_MD_ID || $2 > MAX_MD_ID) {
yyerror("auth-md key-id out of range "
"(%d-%d)", MIN_MD_ID, MAX_MD_ID);
free($3);
YYERROR;
}
if (strlen($3) > MD5_DIGEST_LENGTH) {
yyerror("auth-md key length out of range "
"(max length %d)",
MD5_DIGEST_LENGTH);
free($3);
YYERROR;
}
md_list_add(&defs->md_list, $2, $3);
free($3);
}
authmdkeyid : AUTHMDKEYID NUMBER {
if ($2 < MIN_MD_ID || $2 > MAX_MD_ID) {
yyerror("auth-md-keyid out of range "
"(%d-%d)", MIN_MD_ID, MAX_MD_ID);
YYERROR;
}
defs->auth_keyid = $2;
}
authtype : AUTHTYPE STRING {
enum auth_type type;
if (!strcmp($2, "none"))
type = AUTH_NONE;
else if (!strcmp($2, "simple"))
type = AUTH_SIMPLE;
else if (!strcmp($2, "crypt"))
type = AUTH_CRYPT;
else {
yyerror("unknown auth-type");
free($2);
YYERROR;
}
free($2);
defs->auth_type = type;
}
;
authkey : AUTHKEY STRING {
if (strlen($2) > MAX_SIMPLE_AUTH_LEN) {
yyerror("auth-key too long (max length %d)",
MAX_SIMPLE_AUTH_LEN);
free($2);
YYERROR;
}
strncpy(defs->auth_key, $2,
sizeof(defs->auth_key));
free($2);
}
;
defaults : METRIC NUMBER {
if ($2 < MIN_METRIC || $2 > MAX_METRIC) {
yyerror("metric out of range (%d-%d)",
MIN_METRIC, MAX_METRIC);
YYERROR;
}
defs->metric = $2;
}
| ROUTERPRIORITY NUMBER {
if ($2 < MIN_PRIORITY || $2 > MAX_PRIORITY) {
yyerror("router-priority out of range (%d-%d)",
MIN_PRIORITY, MAX_PRIORITY);
YYERROR;
}
defs->priority = $2;
}
| ROUTERDEADTIME deadtime {
defs->dead_interval = $2;
}
| TRANSMITDELAY NUMBER {
if ($2 < MIN_TRANSMIT_DELAY ||
$2 > MAX_TRANSMIT_DELAY) {
yyerror("transmit-delay out of range (%d-%d)",
MIN_TRANSMIT_DELAY, MAX_TRANSMIT_DELAY);
YYERROR;
}
defs->transmit_delay = $2;
}
| HELLOINTERVAL 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->hello_interval = $2;
}
| FASTHELLOINTERVAL MSEC NUMBER {
if ($3 < MIN_FAST_INTERVAL ||
$3 > MAX_FAST_INTERVAL) {
yyerror("fast-hello-interval msec out of "
"range (%d-%d)", MIN_FAST_INTERVAL,
MAX_FAST_INTERVAL);
YYERROR;
}
defs->fast_hello_interval = $3;
}
| RETRANSMITINTERVAL NUMBER {
if ($2 < MIN_RXMT_INTERVAL || $2 > MAX_RXMT_INTERVAL) {
yyerror("retransmit-interval out of range "
"(%d-%d)", MIN_RXMT_INTERVAL,
MAX_RXMT_INTERVAL);
YYERROR;
}
defs->rxmt_interval = $2;
}
| TYPE P2P {
defs->p2p = 1;
}
| authtype
| authkey
| authmdkeyid
| authmd
;
deadtime : NUMBER {
if ($1 < MIN_RTR_DEAD_TIME || $1 > MAX_RTR_DEAD_TIME) {
yyerror("router-dead-time out of range (%d-%d)",
MIN_RTR_DEAD_TIME, MAX_RTR_DEAD_TIME);
YYERROR;
}
$$ = $1;
}
| MINIMAL {
$$ = FAST_RTR_DEAD_TIME;
}
optnl : '\n' optnl
|
;
nl : '\n' optnl
;
comma : ','
|
;
area : AREA areaid {
area = conf_get_area($2);
memcpy(&areadefs, defs, sizeof(areadefs));
md_list_copy(&areadefs.md_list, &defs->md_list);
defs = &areadefs;
} '{' optnl areaopts_l optnl '}' {
area = NULL;
md_list_clr(&defs->md_list);
defs = &globaldefs;
}
;
demotecount : NUMBER { $$ = $1; }
| { $$ = 1; }
;
areaid : NUMBER {
if ($1 < 0 || $1 > 0xffffffff) {
yyerror("invalid area id");
YYERROR;
}
$$.s_addr = htonl($1);
}
| STRING {
if (inet_pton(AF_INET, $1, &$$) != 1) {
yyerror("error parsing area");
free($1);
YYERROR;
}
free($1);
}
;
areaopts_l : areaopts_l nl areaoptsl
| areaoptsl
;
areaoptsl : interface
| DEMOTE STRING demotecount {
if ($3 < 1 || $3 > 255) {
yyerror("demote count out of range (1-255)");
free($2);
YYERROR;
}
area->demote_level = $3;
if (strlcpy(area->demote_group, $2,
sizeof(area->demote_group)) >=
sizeof(area->demote_group)) {
yyerror("demote group name \"%s\" too long",
$2);
free($2);
YYERROR;
}
free($2);
if (carp_demote_init(area->demote_group,
conf->opts & OSPFD_OPT_FORCE_DEMOTE) == -1) {
yyerror("error initializing group \"%s\"",
area->demote_group);
YYERROR;
}
}
| defaults
| STUB { area->stub = 1; }
| STUB redistribute {
area->stub = 1;
if ($2->type != REDIST_DEFAULT) {
yyerror("bad redistribute option");
YYERROR;
}
if (!SIMPLEQ_EMPTY(&area->redist_list)) {
yyerror("area redistribute option only "
"allowed once");
YYERROR;
}
SIMPLEQ_INSERT_TAIL(&area->redist_list, $2, entry);
}
;
interface : INTERFACE STRING {
struct kif *kif;
struct kif_addr *ka = NULL;
char *s;
struct in_addr addr;
s = strchr($2, ':');
if (s) {
*s++ = '\0';
if (inet_pton(AF_INET, s, &addr) != 1) {
yyerror(
"error parsing interface address");
free($2);
YYERROR;
}
} else
addr.s_addr = 0;
if ((kif = kif_findname($2, addr, &ka)) == NULL) {
yyerror("unknown interface %s", $2);
free($2);
YYERROR;
}
if (ka == NULL) {
if (s)
yyerror("address %s not configured on "
"interface %s", s, $2);
else
yyerror("unnumbered interface %s", $2);
free($2);
YYERROR;
}
free($2);
iface = conf_get_if(kif, ka);
if (iface == NULL)
YYERROR;
iface->area = area;
LIST_INSERT_HEAD(&area->iface_list, iface, entry);
memcpy(&ifacedefs, defs, sizeof(ifacedefs));
md_list_copy(&ifacedefs.md_list, &defs->md_list);
defs = &ifacedefs;
} interface_block {
iface->dead_interval = defs->dead_interval;
iface->fast_hello_interval = defs->fast_hello_interval;
iface->transmit_delay = defs->transmit_delay;
if (iface->dead_interval == FAST_RTR_DEAD_TIME)
iface->hello_interval = 0;
else
iface->hello_interval = defs->hello_interval;
iface->rxmt_interval = defs->rxmt_interval;
iface->metric = defs->metric;
iface->priority = defs->priority;
iface->auth_type = defs->auth_type;
iface->auth_keyid = defs->auth_keyid;
if (defs->p2p == 1)
iface->type = IF_TYPE_POINTOPOINT;
memcpy(iface->auth_key, defs->auth_key,
sizeof(iface->auth_key));
md_list_copy(&iface->auth_md_list, &defs->md_list);
md_list_clr(&defs->md_list);
iface = NULL;
defs = &areadefs;
}
;
interface_block : '{' optnl interfaceopts_l optnl '}'
| '{' optnl '}'
|
;
interfaceopts_l : interfaceopts_l nl interfaceoptsl
| interfaceoptsl
;
interfaceoptsl : PASSIVE { iface->passive = 1; }
| DEMOTE STRING {
if (strlcpy(iface->demote_group, $2,
sizeof(iface->demote_group)) >=
sizeof(iface->demote_group)) {
yyerror("demote group name \"%s\" too long",
$2);
free($2);
YYERROR;
}
free($2);
if (carp_demote_init(iface->demote_group,
conf->opts & OSPFD_OPT_FORCE_DEMOTE) == -1) {
yyerror("error initializing group \"%s\"",
iface->demote_group);
YYERROR;
}
}
| dependon {
struct in_addr addr;
struct kif *kif;
if ($1) {
strlcpy(iface->dependon, $1,
sizeof(iface->dependon));
bzero(&addr, sizeof(addr));
kif = kif_findname($1, addr, NULL);
iface->depend_ok = ifstate_is_up(kif);
} else {
iface->dependon[0] = '\0';
iface->depend_ok = 1;
}
free($1);
}
| defaults
;
%%
struct keywords {
const char *k_name;
int k_val;
};
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);
}
int
kw_cmp(const void *k, const void *e)
{
return (strcmp(k, ((const struct keywords *)e)->k_name));
}
int
lookup(char *s)
{
static const struct keywords keywords[] = {
{"area", AREA},
{"auth-key", AUTHKEY},
{"auth-md", AUTHMD},
{"auth-md-keyid", AUTHMDKEYID},
{"auth-type", AUTHTYPE},
{"demote", DEMOTE},
{"depend", DEPEND},
{"external-tag", EXTTAG},
{"fast-hello-interval", FASTHELLOINTERVAL},
{"fib-priority", FIBPRIORITY},
{"fib-update", FIBUPDATE},
{"hello-interval", HELLOINTERVAL},
{"include", INCLUDE},
{"interface", INTERFACE},
{"metric", METRIC},
{"minimal", MINIMAL},
{"msec", MSEC},
{"no", NO},
{"on", ON},
{"p2p", P2P},
{"passive", PASSIVE},
{"rdomain", RDOMAIN},
{"redistribute", REDISTRIBUTE},
{"retransmit-interval", RETRANSMITINTERVAL},
{"rfc1583compat", RFC1583COMPAT},
{"router", ROUTER},
{"router-dead-time", ROUTERDEADTIME},
{"router-id", ROUTERID},
{"router-priority", ROUTERPRIORITY},
{"rtlabel", RTLABEL},
{"set", SET},
{"spf-delay", SPFDELAY},
{"spf-holdtime", SPFHOLDTIME},
{"stub", STUB},
{"transmit-delay", TRANSMITDELAY},
{"type", TYPE},
{"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);
}
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) {
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;
}
int
findeol(void)
{
int c;
while (1) {
c = lgetc(0);
if (c == '\n') {
file->lineno++;
break;
}
if (c == EOF)
break;
}
return (ERROR);
}
int
yylex(void)
{
char buf[8096];
char *p, *val;
int quotec, next, c;
int token;
top:
p = buf;
while ((c = lgetc(0)) == ' ' || c == '\t')
;
yylval.lineno = file->lineno;
if (c == '#')
while ((c = lgetc(0)) != '\n' && c != EOF)
;
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);
}
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);
}
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);
}
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 ospfd_conf *
parse_config(char *filename, int opts)
{
struct sym *sym, *next;
if ((conf = calloc(1, sizeof(struct ospfd_conf))) == NULL)
fatal("parse_config");
conf->opts = opts;
if (conf->opts & OSPFD_OPT_STUB_ROUTER)
conf->flags |= OSPFD_FLAG_STUB_ROUTER;
bzero(&globaldefs, sizeof(globaldefs));
defs = &globaldefs;
TAILQ_INIT(&defs->md_list);
defs->dead_interval = DEFAULT_RTR_DEAD_TIME;
defs->fast_hello_interval = DEFAULT_FAST_INTERVAL;
defs->transmit_delay = DEFAULT_TRANSMIT_DELAY;
defs->hello_interval = DEFAULT_HELLO_INTERVAL;
defs->rxmt_interval = DEFAULT_RXMT_INTERVAL;
defs->metric = DEFAULT_METRIC;
defs->priority = DEFAULT_PRIORITY;
defs->p2p = 0;
conf->spf_delay = DEFAULT_SPF_DELAY;
conf->spf_hold_time = DEFAULT_SPF_HOLDTIME;
conf->spf_state = SPF_IDLE;
conf->fib_priority = RTP_OSPF;
if ((file = pushfile(filename,
!(conf->opts & OSPFD_OPT_NOACTION))) == NULL) {
free(conf);
return (NULL);
}
topfile = file;
LIST_INIT(&conf->area_list);
LIST_INIT(&conf->cand_list);
SIMPLEQ_INIT(&conf->redist_list);
yyparse();
errors = file->errors;
popfile();
TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
if ((conf->opts & OSPFD_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);
}
}
md_list_clr(&globaldefs.md_list);
errors += conf_check_rdomain(conf->rdomain);
if (errors) {
clear_config(conf);
return (NULL);
}
return (conf);
}
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);
}
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);
}
struct area *
conf_get_area(struct in_addr id)
{
struct area *a;
a = area_find(conf, id);
if (a)
return (a);
a = area_new();
LIST_INSERT_HEAD(&conf->area_list, a, entry);
a->id.s_addr = id.s_addr;
return (a);
}
struct iface *
conf_get_if(struct kif *kif, struct kif_addr *ka)
{
struct area *a;
struct iface *i;
LIST_FOREACH(a, &conf->area_list, entry)
LIST_FOREACH(i, &a->iface_list, entry)
if (i->ifindex == kif->ifindex &&
i->addr.s_addr == ka->addr.s_addr) {
yyerror("interface %s already configured",
kif->ifname);
return (NULL);
}
i = if_new(kif, ka);
i->auth_keyid = 1;
return (i);
}
int
conf_check_rdomain(unsigned int rdomain)
{
struct area *a;
struct iface *i;
struct in_addr addr;
struct kif *kif;
struct redistribute *r;
int errs = 0;
SIMPLEQ_FOREACH(r, &conf->redist_list, entry)
if (r->dependon[0] != '\0') {
bzero(&addr, sizeof(addr));
kif = kif_findname(r->dependon, addr, NULL);
if (kif->rdomain != rdomain) {
logit(LOG_CRIT,
"depend on %s: interface not in rdomain %u",
kif->ifname, rdomain);
errs++;
}
}
LIST_FOREACH(a, &conf->area_list, entry)
LIST_FOREACH(i, &a->iface_list, entry) {
if (i->rdomain != rdomain) {
logit(LOG_CRIT,
"interface %s not in rdomain %u",
i->name, rdomain);
errs++;
}
if (i->dependon[0] != '\0') {
bzero(&addr, sizeof(addr));
kif = kif_findname(i->dependon, addr, NULL);
if (kif->rdomain != rdomain) {
logit(LOG_CRIT,
"depend on %s: interface not in "
"rdomain %u",
kif->ifname, rdomain);
errs++;
}
}
}
return (errs);
}
void
conf_clear_redist_list(struct redist_list *rl)
{
struct redistribute *r;
while ((r = SIMPLEQ_FIRST(rl)) != NULL) {
SIMPLEQ_REMOVE_HEAD(rl, entry);
free(r);
}
}
void
clear_config(struct ospfd_conf *xconf)
{
struct area *a;
while ((a = LIST_FIRST(&xconf->area_list)) != NULL) {
LIST_REMOVE(a, entry);
area_del(a);
}
conf_clear_redist_list(&xconf->redist_list);
free(xconf);
}
u_int32_t
get_rtr_id(void)
{
struct ifaddrs *ifap, *ifa;
u_int32_t ip = 0, cur, localnet;
localnet = htonl(INADDR_LOOPBACK & IN_CLASSA_NET);
if (getifaddrs(&ifap) == -1)
fatal("getifaddrs");
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (strncmp(ifa->ifa_name, "carp", 4) == 0)
continue;
if (ifa->ifa_addr == NULL ||
ifa->ifa_addr->sa_family != AF_INET)
continue;
cur = ((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr;
if ((cur & localnet) == localnet)
continue;
if (ntohl(cur) < ntohl(ip) || ip == 0)
ip = cur;
}
freeifaddrs(ifap);
if (ip == 0)
fatal("router-id is 0.0.0.0");
return (ip);
}
int
host(const char *s, struct in_addr *addr, struct in_addr *mask)
{
struct in_addr ina;
int bits = 32;
bzero(&ina, sizeof(struct in_addr));
if (strrchr(s, '/') != NULL) {
if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
return (0);
} else {
if (inet_pton(AF_INET, s, &ina) != 1)
return (0);
}
addr->s_addr = ina.s_addr;
mask->s_addr = prefixlen2mask(bits);
return (1);
}
