Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/dvmrpd/parse.y	Lines:	0	283	0.0 %
Date:	2017-11-07	Branches:	0	211	0.0 %


/*	$OpenBSD: parse.y,v 1.32 2017/01/05 13:53:09 krw Exp $ */

/*
 * Copyright (c) 2004, 2005, 2006 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/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <unistd.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>

#include "igmp.h"
#include "dvmrp.h"
#include "dvmrpd.h"
#include "dvmrpe.h"
#include "log.h"

TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
static struct file {
	TAILQ_ENTRY(file)	 entry;
	FILE			*stream;
	char			*name;
	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		 lgetc(int);
int		 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 *);

static struct dvmrpd_conf	*conf;
char				*start_state;
struct iface			*iface = NULL;

static struct {
	u_int32_t	 probe_interval;
	u_int32_t	 query_interval;
	u_int32_t	 query_resp_interval;
	u_int32_t	 startup_query_interval;
	u_int32_t	 startup_query_cnt;
	u_int32_t	 last_member_query_interval;
	u_int32_t	 last_member_query_cnt;
	u_int32_t	 dead_interval;
	u_int16_t	 metric;
	u_int8_t	 robustness;
	u_int8_t	 igmp_version;
} *defs, *grdefs, globaldefs, groupdefs, ifacedefs;

void		 clear_config(struct dvmrpd_conf *xconf);
struct iface	*conf_get_if(struct kif *);
struct iface	*new_group(void);

typedef struct {
	union {
		int64_t		 number;
		char		*string;
	} v;
	int lineno;
} YYSTYPE;

%}

%token	INTERFACE FIBUPDATE
%token	GROUP
%token	METRIC PASSIVE
%token	ROBUSTNESS QUERYINTERVAL QUERYRESPINTERVAL
%token	STARTUPQUERYINTERVAL STARTUPQUERYCNT
%token	LASTMEMBERQUERYINTERVAL LASTMEMBERQUERYCNT
%token	IGMPVERSION
%token	ERROR
%token	<v.string>	STRING
%token	<v.number>	NUMBER
%type	<v.number>	yesno
%type	<v.string>	string

%%

grammar		: /* empty */
		| grammar '\n'
		| grammar conf_main '\n'
		| grammar varset '\n'
		| grammar interface '\n'
		| grammar group '\n'
		| grammar error '\n'		{ file->errors++; }
		;

string		: string STRING {
			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
				free($1);
				free($2);
				yyerror("string: asprintf");
				YYERROR;
			}
			free($1);
			free($2);
		}
		| STRING
		;

yesno		: STRING {
			if (!strcmp($1, "yes"))
				$$ = 1;
			else if (!strcmp($1, "no"))
				$$ = 0;
			else {
				yyerror("syntax error, "
				    "either yes or no expected");
				free($1);
				YYERROR;
			}
			free($1);
		}
		;

varset		: STRING '=' string		{
			char *s = $1;
			if (conf->opts & DVMRPD_OPT_VERBOSE)
				printf("%s = \"%s\"\n", $1, $3);
			while (*s++) {
				if (isspace((unsigned char)*s)) {
					yyerror("macro name cannot contain "
					    "whitespace");
					YYERROR;
				}
			}
			if (symset($1, $3, 0) == -1)
				fatal("cannot store variable");
			free($1);
			free($3);
		}
		;

conf_main	: FIBUPDATE yesno {
			if ($2 == 0)
				conf->flags |= DVMRPD_FLAG_NO_FIB_UPDATE;
			else
				conf->flags &= ~DVMRPD_FLAG_NO_FIB_UPDATE;
		}
		| defaults
		;

defaults	: LASTMEMBERQUERYCNT NUMBER {
			if ($2 < MIN_LAST_MEMBER_QUERY_CNT ||
			    $2 > MAX_LAST_MEMBER_QUERY_CNT) {
				yyerror("last-member-query-count out of "
				    "range (%d-%d)",
				    MIN_LAST_MEMBER_QUERY_CNT,
				    MAX_LAST_MEMBER_QUERY_CNT);
				YYERROR;
			}
			defs->last_member_query_cnt = $2;
		}
		| LASTMEMBERQUERYINTERVAL NUMBER {
			if ($2 < MIN_LAST_MEMBER_QUERY_INTERVAL ||
			    $2 > MAX_LAST_MEMBER_QUERY_INTERVAL) {
				yyerror("last-member-query-interval out of "
				    "range (%d-%d)",
				    MIN_LAST_MEMBER_QUERY_INTERVAL,
				    MAX_LAST_MEMBER_QUERY_INTERVAL);
				YYERROR;
			}
			defs->last_member_query_interval = $2;
		}
		| METRIC NUMBER {
			if ($2 < MIN_METRIC || $2 > MAX_METRIC) {
				yyerror("metric out of range (%d-%d)",
				    MIN_METRIC, MAX_METRIC);
				YYERROR;
			}
			defs->metric = $2;
		}
		| QUERYINTERVAL NUMBER {
			if ($2 < MIN_QUERY_INTERVAL ||
			    $2 > MAX_QUERY_INTERVAL) {
				yyerror("query-interval out of range (%d-%d)",
				    MIN_QUERY_INTERVAL, MAX_QUERY_INTERVAL);
				YYERROR;
			}
			defs->query_interval = $2;
		}
		| QUERYRESPINTERVAL NUMBER {
			if ($2 < MIN_QUERY_RESP_INTERVAL ||
			    $2 > MAX_QUERY_RESP_INTERVAL) {
				yyerror("query-response-interval out of "
				    "range (%d-%d)",
				    MIN_QUERY_RESP_INTERVAL,
				    MAX_QUERY_RESP_INTERVAL);
				YYERROR;
			}
			defs->query_resp_interval = $2;
		}
		| ROBUSTNESS NUMBER {
			if ($2 < MIN_ROBUSTNESS || $2 > MAX_ROBUSTNESS) {
				yyerror("robustness out of range (%d-%d)",
				    MIN_ROBUSTNESS, MAX_ROBUSTNESS);
				YYERROR;
			}
			defs->robustness = $2;
		}
		| STARTUPQUERYCNT NUMBER {
			if ($2 < MIN_STARTUP_QUERY_CNT ||
			    $2 > MAX_STARTUP_QUERY_CNT) {
				yyerror("startup-query-count out of "
				    "range (%d-%d)",
				    MIN_STARTUP_QUERY_CNT,
				    MAX_STARTUP_QUERY_CNT);
				YYERROR;
			}
			defs->startup_query_cnt = $2;
		}
		| STARTUPQUERYINTERVAL NUMBER {
			if ($2 < MIN_STARTUP_QUERY_INTERVAL ||
			    $2 > MAX_STARTUP_QUERY_INTERVAL) {
				yyerror("startup-query-interval out of "
				    "range (%d-%d)",
				    MIN_STARTUP_QUERY_INTERVAL,
				    MAX_STARTUP_QUERY_INTERVAL);
				YYERROR;
			}
			defs->startup_query_interval = $2;
		}
		| IGMPVERSION NUMBER {
			if ($2 < MIN_IGMP_VERSION ||
			    $2 > MAX_IGMP_VERSION) {
				yyerror("igmp-version out of range (%d-%d)",
				    MIN_IGMP_VERSION, MAX_IGMP_VERSION);
				YYERROR;
			}
			defs->igmp_version = $2;
		}
		;

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;
			LIST_INSERT_HEAD(&conf->iface_list, iface, entry);

			memcpy(&ifacedefs, defs, sizeof(ifacedefs));
			defs = &ifacedefs;
		} interface_block {
			iface->probe_interval = defs->probe_interval;
			iface->query_interval = defs->query_interval;
			iface->query_resp_interval = defs->query_resp_interval;
			iface->startup_query_interval =
			    defs->startup_query_interval;
			iface->startup_query_cnt = defs->startup_query_cnt;
			iface->last_member_query_interval =
			    defs->last_member_query_interval;
			iface->last_member_query_cnt =
			    defs->last_member_query_cnt;
			iface->dead_interval = defs->dead_interval;
			iface->metric = defs->metric;
			iface->robustness = defs->robustness;
			iface->igmp_version = defs->igmp_version;
			if (grdefs)
				defs = grdefs;
			else
				defs = &globaldefs;
			iface = NULL;
		}
		;

interface_block	: '{' optnl interfaceopts_l '}'
		| '{' optnl '}'
		|
		;

interfaceopts_l	: interfaceopts_l interfaceoptsl
		| interfaceoptsl
		;

interfaceoptsl	: PASSIVE nl		{ iface->passive = 1; }
		| defaults nl
		;

group		: GROUP optnl '{' optnl {
			memcpy(&groupdefs, defs, sizeof(groupdefs));
			grdefs = defs = &groupdefs;
		}
		    groupopts_l '}' {
			grdefs = NULL;
			defs = &globaldefs;
		}
		;

groupopts_l	: groupopts_l groupoptsl
		| groupoptsl
		;

groupoptsl	: interface nl
		| defaults nl
		| error nl
		;

%%

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)
{
	/* this has to be sorted always */
	static const struct keywords keywords[] = {
		{"fib-update",			FIBUPDATE},
		{"group",			GROUP},
		{"igmp-version",		IGMPVERSION},
		{"interface",			INTERFACE},
		{"last-member-query-count",	LASTMEMBERQUERYCNT},
		{"last-member-query-interval",	LASTMEMBERQUERYINTERVAL},
		{"metric",			METRIC},
		{"passive",			PASSIVE},
		{"query-interval",		QUERYINTERVAL},
		{"query-response-interval",	QUERYRESPINTERVAL},
		{"robustness",			ROBUSTNESS},
		{"startup-query-count",		STARTUPQUERYCNT},
		{"startup-query-interval",	STARTUPQUERYINTERVAL}
	};
	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 MAXPUSHBACK	128

u_char	*parsebuf;
int	 parseindex;
u_char	 pushback_buffer[MAXPUSHBACK];
int	 pushback_index = 0;

int
lgetc(int quotec)
{
	int		c, next;

	if (parsebuf) {
		/* Read character from the parsebuffer instead of input. */
		if (parseindex >= 0) {
			c = parsebuf[parseindex++];
			if (c != '\0')
				return (c);
			parsebuf = NULL;
		} else
			parseindex++;
	}

	if (pushback_index)
		return (pushback_buffer[--pushback_index]);

	if (quotec) {
		if ((c = getc(file->stream)) == EOF) {
			yyerror("reached end of file while parsing "
			    "quoted string");
			if (file == topfile || popfile() == EOF)
				return (EOF);
			return (quotec);
		}
		return (c);
	}

	while ((c = getc(file->stream)) == '\\') {
		next = getc(file->stream);
		if (next != '\n') {
			c = next;
			break;
		}
		yylval.lineno = file->lineno;
		file->lineno++;
	}

	while (c == EOF) {
		if (file == topfile || popfile() == EOF)
			return (EOF);
		c = getc(file->stream);
	}
	return (c);
}

int
lungetc(int c)
{
	if (c == EOF)
		return (EOF);
	if (parsebuf) {
		parseindex--;
		if (parseindex >= 0)
			return (c);
	}
	if (pushback_index < MAXPUSHBACK-1)
		return (pushback_buffer[pushback_index++] = c);
	else
		return (EOF);
}

int
findeol(void)
{
	int	c;

	parsebuf = NULL;

	/* skip to either EOF or the first real EOL */
	while (1) {
		if (pushback_index)
			c = pushback_buffer[--pushback_index];
		else
			c = lgetc(0);
		if (c == '\n') {
			file->lineno++;
			break;
		}
		if (c == EOF)
			break;
	}
	return (ERROR);
}

int
yylex(void)
{
	u_char	 buf[8096];
	u_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 == '$' && parsebuf == NULL) {
		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());
		}
		parsebuf = val;
		parseindex = 0;
		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 || c == ' ' || c == '\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, "yylex: strdup");
		return (STRING);
	}

#define allowed_to_end_number(x) \
	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')

	if (c == '-' || isdigit(c)) {
		do {
			*p++ = c;
			if ((unsigned)(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(*--p);
			c = *--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 ((unsigned)(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, "yylex: strdup");
		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("malloc");
		return (NULL);
	}
	if ((nfile->name = strdup(name)) == NULL) {
		log_warn("malloc");
		free(nfile);
		return (NULL);
	}
	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
		log_warn("%s", 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 = 1;
	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);
	file = prev;
	return (file ? 0 : EOF);
}

struct dvmrpd_conf *
parse_config(char *filename, int opts)
{
	int		 errors = 0;
	struct sym	*sym, *next;
	struct timeval	 now;

	if ((conf = calloc(1, sizeof(struct dvmrpd_conf))) == NULL) {
		errx(1, "parse_config calloc");
		return (NULL);
	}

	defs = &globaldefs;
	defs->probe_interval = DEFAULT_PROBE_INTERVAL;
	defs->last_member_query_cnt = DEFAULT_LAST_MEMBER_QUERY_CNT;
	defs->last_member_query_interval = DEFAULT_LAST_MEMBER_QUERY_INTERVAL;
	defs->metric = DEFAULT_METRIC;
	defs->query_interval = DEFAULT_QUERY_INTERVAL;
	defs->query_resp_interval = DEFAULT_QUERY_RESP_INTERVAL;
	defs->robustness = DEFAULT_ROBUSTNESS;
	defs->startup_query_cnt = DEFAULT_STARTUP_QUERY_CNT;
	defs->startup_query_interval = DEFAULT_STARTUP_QUERY_INTERVAL;
	defs->igmp_version = DEFAULT_IGMP_VERSION;
	defs->dead_interval = NBR_TMOUT;

	if ((file = pushfile(filename, 1)) == NULL) {
		free(conf);
		return (NULL);
	}
	topfile = file;

	gettimeofday(&now, NULL);
	conf->gen_id = (u_int32_t)now.tv_sec;	/* for a while after 2038 */
	conf->opts = opts;

	yyparse();
	errors = file->errors;
	popfile();

	/* Free macros and check which have not been used. */
	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
		if ((conf->opts & DVMRPD_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);
		}
	}

	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;
	size_t	len;

	if ((val = strrchr(s, '=')) == NULL)
		return (-1);

	len = strlen(s) - strlen(val) + 1;
	if ((sym = malloc(len)) == NULL)
		errx(1, "cmdline_symset: malloc");

	strlcpy(sym, s, len);

	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 iface *
conf_get_if(struct kif *kif)
{
	struct iface	*i;

	if (kif->ifindex >= MAXVIFS) {
		yyerror("interface %s index too large", kif->ifname);
		return (NULL);
	}

	LIST_FOREACH(i, &conf->iface_list, entry)
		if (i->ifindex == kif->ifindex) {
			yyerror("interface %s already configured",
			    kif->ifname);
			return (NULL);
		}

	i = if_new(kif);
	i->passive = 0;
	i->recv_query_resp_interval = DEFAULT_QUERY_RESP_INTERVAL;

	return (i);
}

void
clear_config(struct dvmrpd_conf *xconf)
{
	/* XXX clear conf */
		/* ... */
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.y,v 1.32 2017/01/05 13:53:09 krw Exp $ */
2
3			/*
4			* Copyright (c) 2004, 2005, 2006 Esben Norby <norby@openbsd.org>
5			* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
6			* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
7			* Copyright (c) 2001 Markus Friedl. All rights reserved.
8			* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
9			* Copyright (c) 2001 Theo de Raadt. All rights reserved.
10			*
11			* Permission to use, copy, modify, and distribute this software for any
12			* purpose with or without fee is hereby granted, provided that the above
13			* copyright notice and this permission notice appear in all copies.
14			*
15			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
16			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
18			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22			*/
23
24			%{
25			#include <sys/types.h>
26			#include <sys/time.h>
27			#include <sys/stat.h>
28			#include <sys/socket.h>
29			#include <netinet/in.h>
30			#include <arpa/inet.h>
31			#include <net/if.h>
32			#include <ctype.h>
33			#include <err.h>
34			#include <limits.h>
35			#include <unistd.h>
36			#include <errno.h>
37			#include <stdarg.h>
38			#include <stdio.h>
39			#include <string.h>
40			#include <syslog.h>
41
42			#include "igmp.h"
43			#include "dvmrp.h"
44			#include "dvmrpd.h"
45			#include "dvmrpe.h"
46			#include "log.h"
47
48			TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
49			static struct file {
50			TAILQ_ENTRY(file) entry;
51			FILE *stream;
52			char *name;
53			int lineno;
54			int errors;
55			} file, topfile;
56			struct file pushfile(const char , int);
57			int popfile(void);
58			int check_file_secrecy(int, const char *);
59			int yyparse(void);
60			int yylex(void);
61			int yyerror(const char *, ...)
62			__attribute__((__format__ (printf, 1, 2)))
63			__attribute__((__nonnull__ (1)));
64			int kw_cmp(const void , const void );
65			int lookup(char *);
66			int lgetc(int);
67			int lungetc(int);
68			int findeol(void);
69
70			TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
71			struct sym {
72			TAILQ_ENTRY(sym) entry;
73			int used;
74			int persist;
75			char *nam;
76			char *val;
77			};
78			int symset(const char , const char , int);
79			char symget(const char );
80
81			static struct dvmrpd_conf *conf;
82			char *start_state;
83			struct iface *iface = NULL;
84
85			static struct {
86			u_int32_t probe_interval;
87			u_int32_t query_interval;
88			u_int32_t query_resp_interval;
89			u_int32_t startup_query_interval;
90			u_int32_t startup_query_cnt;
91			u_int32_t last_member_query_interval;
92			u_int32_t last_member_query_cnt;
93			u_int32_t dead_interval;
94			u_int16_t metric;
95			u_int8_t robustness;
96			u_int8_t igmp_version;
97			} defs, grdefs, globaldefs, groupdefs, ifacedefs;
98
99			void clear_config(struct dvmrpd_conf *xconf);
100			struct iface conf_get_if(struct kif );
101			struct iface *new_group(void);
102
103			typedef struct {
104			union {
105			int64_t number;
106			char *string;
107			} v;
108			int lineno;
109			} YYSTYPE;
110
111			%}
112
113			%token INTERFACE FIBUPDATE
114			%token GROUP
115			%token METRIC PASSIVE
116			%token ROBUSTNESS QUERYINTERVAL QUERYRESPINTERVAL
117			%token STARTUPQUERYINTERVAL STARTUPQUERYCNT
118			%token LASTMEMBERQUERYINTERVAL LASTMEMBERQUERYCNT
119			%token IGMPVERSION
120			%token ERROR
121			%token <v.string> STRING
122			%token <v.number> NUMBER
123			%type <v.number> yesno
124			%type <v.string> string
125
126			%%
127
128			grammar : /* empty */
129			\| grammar '\n'
130			\| grammar conf_main '\n'
131			\| grammar varset '\n'
132			\| grammar interface '\n'
133			\| grammar group '\n'
134			\| grammar error '\n' { file->errors++; }
135			;
136
137			string : string STRING {
138			if (asprintf(&$$, "%s %s", $1, $2) == -1) {
139			free($1);
140			free($2);
141			yyerror("string: asprintf");
142			YYERROR;
143			}
144			free($1);
145			free($2);
146			}
147			\| STRING
148			;
149
150			yesno : STRING {
151			if (!strcmp($1, "yes"))
152			$$ = 1;
153			else if (!strcmp($1, "no"))
154			$$ = 0;
155			else {
156			yyerror("syntax error, "
157			"either yes or no expected");
158			free($1);
159			YYERROR;
160			}
161			free($1);
162			}
163			;
164
165			varset : STRING '=' string {
166			char *s = $1;
167			if (conf->opts & DVMRPD_OPT_VERBOSE)
168			printf("%s = \"%s\"\n", $1, $3);
169			while (*s++) {
170			if (isspace((unsigned char)*s)) {
171			yyerror("macro name cannot contain "
172			"whitespace");
173			YYERROR;
174			}
175			}
176			if (symset($1, $3, 0) == -1)
177			fatal("cannot store variable");
178			free($1);
179			free($3);
180			}
181			;
182
183			conf_main : FIBUPDATE yesno {
184			if ($2 == 0)
185			conf->flags \|= DVMRPD_FLAG_NO_FIB_UPDATE;
186			else
187			conf->flags &= ~DVMRPD_FLAG_NO_FIB_UPDATE;
188			}
189			\| defaults
190			;
191
192			defaults : LASTMEMBERQUERYCNT NUMBER {
193			if ($2 < MIN_LAST_MEMBER_QUERY_CNT \|\|
194			$2 > MAX_LAST_MEMBER_QUERY_CNT) {
195			yyerror("last-member-query-count out of "
196			"range (%d-%d)",
197			MIN_LAST_MEMBER_QUERY_CNT,
198			MAX_LAST_MEMBER_QUERY_CNT);
199			YYERROR;
200			}
201			defs->last_member_query_cnt = $2;
202			}
203			\| LASTMEMBERQUERYINTERVAL NUMBER {
204			if ($2 < MIN_LAST_MEMBER_QUERY_INTERVAL \|\|
205			$2 > MAX_LAST_MEMBER_QUERY_INTERVAL) {
206			yyerror("last-member-query-interval out of "
207			"range (%d-%d)",
208			MIN_LAST_MEMBER_QUERY_INTERVAL,
209			MAX_LAST_MEMBER_QUERY_INTERVAL);
210			YYERROR;
211			}
212			defs->last_member_query_interval = $2;
213			}
214			\| METRIC NUMBER {
215			if ($2 < MIN_METRIC \|\| $2 > MAX_METRIC) {
216			yyerror("metric out of range (%d-%d)",
217			MIN_METRIC, MAX_METRIC);
218			YYERROR;
219			}
220			defs->metric = $2;
221			}
222			\| QUERYINTERVAL NUMBER {
223			if ($2 < MIN_QUERY_INTERVAL \|\|
224			$2 > MAX_QUERY_INTERVAL) {
225			yyerror("query-interval out of range (%d-%d)",
226			MIN_QUERY_INTERVAL, MAX_QUERY_INTERVAL);
227			YYERROR;
228			}
229			defs->query_interval = $2;
230			}
231			\| QUERYRESPINTERVAL NUMBER {
232			if ($2 < MIN_QUERY_RESP_INTERVAL \|\|
233			$2 > MAX_QUERY_RESP_INTERVAL) {
234			yyerror("query-response-interval out of "
235			"range (%d-%d)",
236			MIN_QUERY_RESP_INTERVAL,
237			MAX_QUERY_RESP_INTERVAL);
238			YYERROR;
239			}
240			defs->query_resp_interval = $2;
241			}
242			\| ROBUSTNESS NUMBER {
243			if ($2 < MIN_ROBUSTNESS \|\| $2 > MAX_ROBUSTNESS) {
244			yyerror("robustness out of range (%d-%d)",
245			MIN_ROBUSTNESS, MAX_ROBUSTNESS);
246			YYERROR;
247			}
248			defs->robustness = $2;
249			}
250			\| STARTUPQUERYCNT NUMBER {
251			if ($2 < MIN_STARTUP_QUERY_CNT \|\|
252			$2 > MAX_STARTUP_QUERY_CNT) {
253			yyerror("startup-query-count out of "
254			"range (%d-%d)",
255			MIN_STARTUP_QUERY_CNT,
256			MAX_STARTUP_QUERY_CNT);
257			YYERROR;
258			}
259			defs->startup_query_cnt = $2;
260			}
261			\| STARTUPQUERYINTERVAL NUMBER {
262			if ($2 < MIN_STARTUP_QUERY_INTERVAL \|\|
263			$2 > MAX_STARTUP_QUERY_INTERVAL) {
264			yyerror("startup-query-interval out of "
265			"range (%d-%d)",
266			MIN_STARTUP_QUERY_INTERVAL,
267			MAX_STARTUP_QUERY_INTERVAL);
268			YYERROR;
269			}
270			defs->startup_query_interval = $2;
271			}
272			\| IGMPVERSION NUMBER {
273			if ($2 < MIN_IGMP_VERSION \|\|
274			$2 > MAX_IGMP_VERSION) {
275			yyerror("igmp-version out of range (%d-%d)",
276			MIN_IGMP_VERSION, MAX_IGMP_VERSION);
277			YYERROR;
278			}
279			defs->igmp_version = $2;
280			}
281			;
282
283			optnl : '\n' optnl
284			\|
285			;
286
287			nl : '\n' optnl /* one newline or more */
288			;
289
290			interface : INTERFACE STRING {
291			struct kif *kif;
292
293			if ((kif = kif_findname($2)) == NULL) {
294			yyerror("unknown interface %s", $2);
295			free($2);
296			YYERROR;
297			}
298			free($2);
299			iface = conf_get_if(kif);
300			if (iface == NULL)
301			YYERROR;
302			LIST_INSERT_HEAD(&conf->iface_list, iface, entry);
303
304			memcpy(&ifacedefs, defs, sizeof(ifacedefs));
305			defs = &ifacedefs;
306			} interface_block {
307			iface->probe_interval = defs->probe_interval;
308			iface->query_interval = defs->query_interval;
309			iface->query_resp_interval = defs->query_resp_interval;
310			iface->startup_query_interval =
311			defs->startup_query_interval;
312			iface->startup_query_cnt = defs->startup_query_cnt;
313			iface->last_member_query_interval =
314			defs->last_member_query_interval;
315			iface->last_member_query_cnt =
316			defs->last_member_query_cnt;
317			iface->dead_interval = defs->dead_interval;
318			iface->metric = defs->metric;
319			iface->robustness = defs->robustness;
320			iface->igmp_version = defs->igmp_version;
321			if (grdefs)
322			defs = grdefs;
323			else
324			defs = &globaldefs;
325			iface = NULL;
326			}
327			;
328
329			interface_block : '{' optnl interfaceopts_l '}'
330			\| '{' optnl '}'
331			\|
332			;
333
334			interfaceopts_l : interfaceopts_l interfaceoptsl
335			\| interfaceoptsl
336			;
337
338			interfaceoptsl : PASSIVE nl { iface->passive = 1; }
339			\| defaults nl
340			;
341
342			group : GROUP optnl '{' optnl {
343			memcpy(&groupdefs, defs, sizeof(groupdefs));
344			grdefs = defs = &groupdefs;
345			}
346			groupopts_l '}' {
347			grdefs = NULL;
348			defs = &globaldefs;
349			}
350			;
351
352			groupopts_l : groupopts_l groupoptsl
353			\| groupoptsl
354			;
355
356			groupoptsl : interface nl
357			\| defaults nl
358			\| error nl
359			;
360
361			%%
362
363			struct keywords {
364			const char *k_name;
365			int k_val;
366			};
367
368			int
369			yyerror(const char *fmt, ...)
370			{
371			va_list ap;
372			char *msg;
373
374			file->errors++;
375			va_start(ap, fmt);
376			if (vasprintf(&msg, fmt, ap) == -1)
377			fatalx("yyerror vasprintf");
378			va_end(ap);
379			logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
380			free(msg);
381			return (0);
382			}
383
384			int
385			kw_cmp(const void k, const void e)
386			{
387			return (strcmp(k, ((const struct keywords *)e)->k_name));
388			}
389
390			int
391			lookup(char *s)
392			{
393			/* this has to be sorted always */
394			static const struct keywords keywords[] = {
395			{"fib-update", FIBUPDATE},
396			{"group", GROUP},
397			{"igmp-version", IGMPVERSION},
398			{"interface", INTERFACE},
399			{"last-member-query-count", LASTMEMBERQUERYCNT},
400			{"last-member-query-interval", LASTMEMBERQUERYINTERVAL},
401			{"metric", METRIC},
402			{"passive", PASSIVE},
403			{"query-interval", QUERYINTERVAL},
404			{"query-response-interval", QUERYRESPINTERVAL},
405			{"robustness", ROBUSTNESS},
406			{"startup-query-count", STARTUPQUERYCNT},
407			{"startup-query-interval", STARTUPQUERYINTERVAL}
408			};
409			const struct keywords *p;
410
411			p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
412			sizeof(keywords[0]), kw_cmp);
413
414			if (p)
415			return (p->k_val);
416			else
417			return (STRING);
418			}
419
420			#define MAXPUSHBACK 128
421
422			u_char *parsebuf;
423			int parseindex;
424			u_char pushback_buffer[MAXPUSHBACK];
425			int pushback_index = 0;
426
427			int
428			lgetc(int quotec)
429			{
430			int c, next;
431
432			if (parsebuf) {
433			/* Read character from the parsebuffer instead of input. */
434			if (parseindex >= 0) {
435			c = parsebuf[parseindex++];
436			if (c != '\0')
437			return (c);
438			parsebuf = NULL;
439			} else
440			parseindex++;
441			}
442
443			if (pushback_index)
444			return (pushback_buffer[--pushback_index]);
445
446			if (quotec) {
447			if ((c = getc(file->stream)) == EOF) {
448			yyerror("reached end of file while parsing "
449			"quoted string");
450			if (file == topfile \|\| popfile() == EOF)
451			return (EOF);
452			return (quotec);
453			}
454			return (c);
455			}
456
457			while ((c = getc(file->stream)) == '\\') {
458			next = getc(file->stream);
459			if (next != '\n') {
460			c = next;
461			break;
462			}
463			yylval.lineno = file->lineno;
464			file->lineno++;
465			}
466
467			while (c == EOF) {
468			if (file == topfile \|\| popfile() == EOF)
469			return (EOF);
470			c = getc(file->stream);
471			}
472			return (c);
473			}
474
475			int
476			lungetc(int c)
477			{
478			if (c == EOF)
479			return (EOF);
480			if (parsebuf) {
481			parseindex--;
482			if (parseindex >= 0)
483			return (c);
484			}
485			if (pushback_index < MAXPUSHBACK-1)
486			return (pushback_buffer[pushback_index++] = c);
487			else
488			return (EOF);
489			}
490
491			int
492			findeol(void)
493			{
494			int c;
495
496			parsebuf = NULL;
497
498			/* skip to either EOF or the first real EOL */
499			while (1) {
500			if (pushback_index)
501			c = pushback_buffer[--pushback_index];
502			else
503			c = lgetc(0);
504			if (c == '\n') {
505			file->lineno++;
506			break;
507			}
508			if (c == EOF)
509			break;
510			}
511			return (ERROR);
512			}
513
514			int
515			yylex(void)
516			{
517			u_char buf[8096];
518			u_char p, val;
519			int quotec, next, c;
520			int token;
521
522			top:
523			p = buf;
524			while ((c = lgetc(0)) == ' ' \|\| c == '\t')
525			; /* nothing */
526
527			yylval.lineno = file->lineno;
528			if (c == '#')
529			while ((c = lgetc(0)) != '\n' && c != EOF)
530			; /* nothing */
531			if (c == '$' && parsebuf == NULL) {
532			while (1) {
533			if ((c = lgetc(0)) == EOF)
534			return (0);
535
536			if (p + 1 >= buf + sizeof(buf) - 1) {
537			yyerror("string too long");
538			return (findeol());
539			}
540			if (isalnum(c) \|\| c == '_') {
541			*p++ = c;
542			continue;
543			}
544			*p = '\0';
545			lungetc(c);
546			break;
547			}
548			val = symget(buf);
549			if (val == NULL) {
550			yyerror("macro '%s' not defined", buf);
551			return (findeol());
552			}
553			parsebuf = val;
554			parseindex = 0;
555			goto top;
556			}
557
558			switch (c) {
559			case '\'':
560			case '"':
561			quotec = c;
562			while (1) {
563			if ((c = lgetc(quotec)) == EOF)
564			return (0);
565			if (c == '\n') {
566			file->lineno++;
567			continue;
568			} else if (c == '\\') {
569			if ((next = lgetc(quotec)) == EOF)
570			return (0);
571			if (next == quotec \|\| c == ' ' \|\| c == '\t')
572			c = next;
573			else if (next == '\n') {
574			file->lineno++;
575			continue;
576			} else
577			lungetc(next);
578			} else if (c == quotec) {
579			*p = '\0';
580			break;
581			} else if (c == '\0') {
582			yyerror("syntax error");
583			return (findeol());
584			}
585			if (p + 1 >= buf + sizeof(buf) - 1) {
586			yyerror("string too long");
587			return (findeol());
588			}
589			*p++ = c;
590			}
591			yylval.v.string = strdup(buf);
592			if (yylval.v.string == NULL)
593			err(1, "yylex: strdup");
594			return (STRING);
595			}
596
597			#define allowed_to_end_number(x) \
598			(isspace(x) \|\| x == ')' \|\| x ==',' \|\| x == '/' \|\| x == '}' \|\| x == '=')
599
600			if (c == '-' \|\| isdigit(c)) {
601			do {
602			*p++ = c;
603			if ((unsigned)(p-buf) >= sizeof(buf)) {
604			yyerror("string too long");
605			return (findeol());
606			}
607			} while ((c = lgetc(0)) != EOF && isdigit(c));
608			lungetc(c);
609			if (p == buf + 1 && buf[0] == '-')
610			goto nodigits;
611			if (c == EOF \|\| allowed_to_end_number(c)) {
612			const char *errstr = NULL;
613
614			*p = '\0';
615			yylval.v.number = strtonum(buf, LLONG_MIN,
616			LLONG_MAX, &errstr);
617			if (errstr) {
618			yyerror("\"%s\" invalid number: %s",
619			buf, errstr);
620			return (findeol());
621			}
622			return (NUMBER);
623			} else {
624			nodigits:
625			while (p > buf + 1)
626			lungetc(*--p);
627			c = *--p;
628			if (c == '-')
629			return (c);
630			}
631			}
632
633			#define allowed_in_string(x) \
634			(isalnum(x) \|\| (ispunct(x) && x != '(' && x != ')' && \
635			x != '{' && x != '}' && \
636			x != '!' && x != '=' && x != '#' && \
637			x != ','))
638
639			if (isalnum(c) \|\| c == ':' \|\| c == '_') {
640			do {
641			*p++ = c;
642			if ((unsigned)(p-buf) >= sizeof(buf)) {
643			yyerror("string too long");
644			return (findeol());
645			}
646			} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
647			lungetc(c);
648			*p = '\0';
649			if ((token = lookup(buf)) == STRING)
650			if ((yylval.v.string = strdup(buf)) == NULL)
651			err(1, "yylex: strdup");
652			return (token);
653			}
654			if (c == '\n') {
655			yylval.lineno = file->lineno;
656			file->lineno++;
657			}
658			if (c == EOF)
659			return (0);
660			return (c);
661			}
662
663			int
664			check_file_secrecy(int fd, const char *fname)
665			{
666			struct stat st;
667
668			if (fstat(fd, &st)) {
669			log_warn("cannot stat %s", fname);
670			return (-1);
671			}
672			if (st.st_uid != 0 && st.st_uid != getuid()) {
673			log_warnx("%s: owner not root or current user", fname);
674			return (-1);
675			}
676			if (st.st_mode & (S_IWGRP \| S_IXGRP \| S_IRWXO)) {
677			log_warnx("%s: group writable or world read/writable", fname);
678			return (-1);
679			}
680			return (0);
681			}
682
683			struct file *
684			pushfile(const char *name, int secret)
685			{
686			struct file *nfile;
687
688			if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
689			log_warn("malloc");
690			return (NULL);
691			}
692			if ((nfile->name = strdup(name)) == NULL) {
693			log_warn("malloc");
694			free(nfile);
695			return (NULL);
696			}
697			if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
698			log_warn("%s", nfile->name);
699			free(nfile->name);
700			free(nfile);
701			return (NULL);
702			} else if (secret &&
703			check_file_secrecy(fileno(nfile->stream), nfile->name)) {
704			fclose(nfile->stream);
705			free(nfile->name);
706			free(nfile);
707			return (NULL);
708			}
709			nfile->lineno = 1;
710			TAILQ_INSERT_TAIL(&files, nfile, entry);
711			return (nfile);
712			}
713
714			int
715			popfile(void)
716			{
717			struct file *prev;
718
719			if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
720			prev->errors += file->errors;
721
722			TAILQ_REMOVE(&files, file, entry);
723			fclose(file->stream);
724			free(file->name);
725			free(file);
726			file = prev;
727			return (file ? 0 : EOF);
728			}
729
730			struct dvmrpd_conf *
731			parse_config(char *filename, int opts)
732			{
733			int errors = 0;
734			struct sym sym, next;
735			struct timeval now;
736
737			if ((conf = calloc(1, sizeof(struct dvmrpd_conf))) == NULL) {
738			errx(1, "parse_config calloc");
739			return (NULL);
740			}
741
742			defs = &globaldefs;
743			defs->probe_interval = DEFAULT_PROBE_INTERVAL;
744			defs->last_member_query_cnt = DEFAULT_LAST_MEMBER_QUERY_CNT;
745			defs->last_member_query_interval = DEFAULT_LAST_MEMBER_QUERY_INTERVAL;
746			defs->metric = DEFAULT_METRIC;
747			defs->query_interval = DEFAULT_QUERY_INTERVAL;
748			defs->query_resp_interval = DEFAULT_QUERY_RESP_INTERVAL;
749			defs->robustness = DEFAULT_ROBUSTNESS;
750			defs->startup_query_cnt = DEFAULT_STARTUP_QUERY_CNT;
751			defs->startup_query_interval = DEFAULT_STARTUP_QUERY_INTERVAL;
752			defs->igmp_version = DEFAULT_IGMP_VERSION;
753			defs->dead_interval = NBR_TMOUT;
754
755			if ((file = pushfile(filename, 1)) == NULL) {
756			free(conf);
757			return (NULL);
758			}
759			topfile = file;
760
761			gettimeofday(&now, NULL);
762			conf->gen_id = (u_int32_t)now.tv_sec; /* for a while after 2038 */
763			conf->opts = opts;
764
765			yyparse();
766			errors = file->errors;
767			popfile();
768
769			/* Free macros and check which have not been used. */
770			TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
771			if ((conf->opts & DVMRPD_OPT_VERBOSE2) && !sym->used)
772			fprintf(stderr, "warning: macro '%s' not "
773			"used\n", sym->nam);
774			if (!sym->persist) {
775			free(sym->nam);
776			free(sym->val);
777			TAILQ_REMOVE(&symhead, sym, entry);
778			free(sym);
779			}
780			}
781
782			if (errors) {
783			clear_config(conf);
784			return (NULL);
785			}
786
787			return (conf);
788			}
789
790			int
791			symset(const char nam, const char val, int persist)
792			{
793			struct sym *sym;
794
795			TAILQ_FOREACH(sym, &symhead, entry) {
796			if (strcmp(nam, sym->nam) == 0)
797			break;
798			}
799
800			if (sym != NULL) {
801			if (sym->persist == 1)
802			return (0);
803			else {
804			free(sym->nam);
805			free(sym->val);
806			TAILQ_REMOVE(&symhead, sym, entry);
807			free(sym);
808			}
809			}
810			if ((sym = calloc(1, sizeof(*sym))) == NULL)
811			return (-1);
812
813			sym->nam = strdup(nam);
814			if (sym->nam == NULL) {
815			free(sym);
816			return (-1);
817			}
818			sym->val = strdup(val);
819			if (sym->val == NULL) {
820			free(sym->nam);
821			free(sym);
822			return (-1);
823			}
824			sym->used = 0;
825			sym->persist = persist;
826			TAILQ_INSERT_TAIL(&symhead, sym, entry);
827			return (0);
828			}
829
830			int
831			cmdline_symset(char *s)
832			{
833			char sym, val;
834			int ret;
835			size_t len;
836
837			if ((val = strrchr(s, '=')) == NULL)
838			return (-1);
839
840			len = strlen(s) - strlen(val) + 1;
841			if ((sym = malloc(len)) == NULL)
842			errx(1, "cmdline_symset: malloc");
843
844			strlcpy(sym, s, len);
845
846			ret = symset(sym, val + 1, 1);
847			free(sym);
848
849			return (ret);
850			}
851
852			char *
853			symget(const char *nam)
854			{
855			struct sym *sym;
856
857			TAILQ_FOREACH(sym, &symhead, entry) {
858			if (strcmp(nam, sym->nam) == 0) {
859			sym->used = 1;
860			return (sym->val);
861			}
862			}
863			return (NULL);
864			}
865
866			struct iface *
867			conf_get_if(struct kif *kif)
868			{
869			struct iface *i;
870
871			if (kif->ifindex >= MAXVIFS) {
872			yyerror("interface %s index too large", kif->ifname);
873			return (NULL);
874			}
875
876			LIST_FOREACH(i, &conf->iface_list, entry)
877			if (i->ifindex == kif->ifindex) {
878			yyerror("interface %s already configured",
879			kif->ifname);
880			return (NULL);
881			}
882
883			i = if_new(kif);
884			i->passive = 0;
885			i->recv_query_resp_interval = DEFAULT_QUERY_RESP_INTERVAL;
886
887			return (i);
888			}
889
890			void
891			clear_config(struct dvmrpd_conf *xconf)
892			{
893			/* XXX clear conf */
894			/* ... */
895			}