Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ntpd/parse.y	Lines:	0	176	0.0 %
Date:	2017-11-13	Branches:	0	143	0.0 %


/*	$OpenBSD: parse.y,v 1.67 2017/08/11 19:12:21 naddy Exp $ */

/*
 * 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/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>

#include "ntpd.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		 popfile(void);
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);

struct ntpd_conf		*conf;
struct sockaddr_in		 query_addr4;
struct sockaddr_in6		 query_addr6;

struct opts {
	int		weight;
	int		correction;
	int		stratum;
	int		rtable;
	char		*refstr;
} opts;
void		opts_default(void);

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

%}

%token	LISTEN ON CONSTRAINT CONSTRAINTS FROM QUERY
%token	SERVER SERVERS SENSOR CORRECTION RTABLE REFID STRATUM WEIGHT
%token	ERROR
%token	<v.string>		STRING
%token	<v.number>		NUMBER
%type	<v.addr>		address url
%type	<v.opts>		listen_opts listen_opts_l listen_opt
%type	<v.opts>		server_opts server_opts_l server_opt
%type	<v.opts>		sensor_opts sensor_opts_l sensor_opt
%type	<v.opts>		correction
%type	<v.opts>		rtable
%type	<v.opts>		refid
%type	<v.opts>		stratum
%type	<v.opts>		weight
%%

grammar		: /* empty */
		| grammar '\n'
		| grammar main '\n'
		| grammar error '\n'		{ file->errors++; }
		;

main		: LISTEN ON address listen_opts	{
			struct listen_addr	*la;
			struct ntp_addr		*h, *next;

			if ((h = $3->a) == NULL &&
			    (host_dns($3->name, &h) == -1 || !h)) {
				yyerror("could not resolve \"%s\"", $3->name);
				free($3->name);
				free($3);
				YYERROR;
			}

			for (; h != NULL; h = next) {
				next = h->next;
				la = calloc(1, sizeof(struct listen_addr));
				if (la == NULL)
					fatal("listen on calloc");
				la->fd = -1;
				la->rtable = $4.rtable;
				memcpy(&la->sa, &h->ss,
				    sizeof(struct sockaddr_storage));
				TAILQ_INSERT_TAIL(&conf->listen_addrs, la,
				    entry);
				free(h);
			}
			free($3->name);
			free($3);
		}
		| QUERY FROM STRING {
			struct sockaddr_in sin4;
			struct sockaddr_in6 sin6;

			memset(&sin4, 0, sizeof(sin4));
			sin4.sin_family = AF_INET;
			sin4.sin_len = sizeof(struct sockaddr_in);
			memset(&sin6, 0, sizeof(sin6));
			sin6.sin6_family = AF_INET6;
			sin6.sin6_len = sizeof(struct sockaddr_in6);

			if (inet_pton(AF_INET, $3, &sin4.sin_addr) == 1)
				memcpy(&query_addr4, &sin4, sin4.sin_len);
			else if (inet_pton(AF_INET6, $3, &sin6.sin6_addr) == 1)
				memcpy(&query_addr6, &sin6, sin6.sin6_len);
			else {
				yyerror("invalid IPv4 or IPv6 address: %s\n",
				    $3);
				free($3);
				YYERROR;
			}

			free($3);
		}
		| SERVERS address server_opts	{
			struct ntp_peer		*p;
			struct ntp_addr		*h, *next;

			h = $2->a;
			do {
				if (h != NULL) {
					next = h->next;
					if (h->ss.ss_family != AF_INET &&
					    h->ss.ss_family != AF_INET6) {
						yyerror("IPv4 or IPv6 address "
						    "or hostname expected");
						free(h);
						free($2->name);
						free($2);
						YYERROR;
					}
					h->next = NULL;
				} else
					next = NULL;

				p = new_peer();
				p->weight = $3.weight;
				p->query_addr4 = query_addr4;
				p->query_addr6 = query_addr6;
				p->addr = h;
				p->addr_head.a = h;
				p->addr_head.pool = 1;
				p->addr_head.name = strdup($2->name);
				if (p->addr_head.name == NULL)
					fatal(NULL);
				if (p->addr != NULL)
					p->state = STATE_DNS_DONE;
				TAILQ_INSERT_TAIL(&conf->ntp_peers, p, entry);
				h = next;
			} while (h != NULL);

			free($2->name);
			free($2);
		}
		| SERVER address server_opts {
			struct ntp_peer		*p;
			struct ntp_addr		*h, *next;

			p = new_peer();
			for (h = $2->a; h != NULL; h = next) {
				next = h->next;
				if (h->ss.ss_family != AF_INET &&
				    h->ss.ss_family != AF_INET6) {
					yyerror("IPv4 or IPv6 address "
					    "or hostname expected");
					free(h);
					free(p);
					free($2->name);
					free($2);
					YYERROR;
				}
				h->next = p->addr;
				p->addr = h;
			}

			p->weight = $3.weight;
			p->query_addr4 = query_addr4;
			p->query_addr6 = query_addr6;
			p->addr_head.a = p->addr;
			p->addr_head.pool = 0;
			p->addr_head.name = strdup($2->name);
			if (p->addr_head.name == NULL)
				fatal(NULL);
			if (p->addr != NULL)
				p->state = STATE_DNS_DONE;
			TAILQ_INSERT_TAIL(&conf->ntp_peers, p, entry);
			free($2->name);
			free($2);
		}
		| CONSTRAINTS FROM url		{
			struct constraint	*p;
			struct ntp_addr		*h, *next;

			h = $3->a;
			do {
				if (h != NULL) {
					next = h->next;
					if (h->ss.ss_family != AF_INET &&
					    h->ss.ss_family != AF_INET6) {
						yyerror("IPv4 or IPv6 address "
						    "or hostname expected");
						free(h);
						free($3->name);
						free($3->path);
						free($3);
						YYERROR;
					}
					h->next = NULL;
				} else
					next = NULL;

				p = new_constraint();
				p->addr = h;
				p->addr_head.a = h;
				p->addr_head.pool = 1;
				p->addr_head.name = strdup($3->name);
				p->addr_head.path = strdup($3->path);
				if (p->addr_head.name == NULL ||
				    p->addr_head.path == NULL)
					fatal(NULL);
				if (p->addr != NULL)
					p->state = STATE_DNS_DONE;
				constraint_add(p);
				h = next;
			} while (h != NULL);

			free($3->name);
			free($3);
		}
		| CONSTRAINT FROM url		{
			struct constraint	*p;
			struct ntp_addr		*h, *next;

			p = new_constraint();
			for (h = $3->a; h != NULL; h = next) {
				next = h->next;
				if (h->ss.ss_family != AF_INET &&
				    h->ss.ss_family != AF_INET6) {
					yyerror("IPv4 or IPv6 address "
					    "or hostname expected");
					free(h);
					free(p);
					free($3->name);
					free($3->path);
					free($3);
					YYERROR;
				}
				h->next = p->addr;
				p->addr = h;
			}

			p->addr_head.a = p->addr;
			p->addr_head.pool = 0;
			p->addr_head.name = strdup($3->name);
			p->addr_head.path = strdup($3->path);
			if (p->addr_head.name == NULL ||
			    p->addr_head.path == NULL)
				fatal(NULL);
			if (p->addr != NULL)
				p->state = STATE_DNS_DONE;
			constraint_add(p);
			free($3->name);
			free($3);
		}
		| SENSOR STRING	sensor_opts {
			struct ntp_conf_sensor	*s;

			s = new_sensor($2);
			s->weight = $3.weight;
			s->correction = $3.correction;
			s->refstr = $3.refstr;
			s->stratum = $3.stratum;
			free($2);
			TAILQ_INSERT_TAIL(&conf->ntp_conf_sensors, s, entry);
		}
		;

address		: STRING		{
			if (($$ = calloc(1, sizeof(struct ntp_addr_wrap))) ==
			    NULL)
				fatal(NULL);
			host($1, &$$->a);
			$$->name = $1;
		}
		;

url		: STRING		{
			char	*hname, *path;

			if (($$ = calloc(1, sizeof(struct ntp_addr_wrap))) ==
			    NULL)
				fatal("calloc");

			if (strncmp("https://", $1,
			    strlen("https://")) != 0) {
				host($1, &$$->a);
				$$->name = $1;
			} else {
				hname = $1 + strlen("https://");

				path = hname + strcspn(hname, "/\\");
				if (*path != '\0') {
					if (($$->path = strdup(path)) == NULL)
						fatal("strdup");
					*path = '\0';
				}
				host(hname, &$$->a);
				if (($$->name = strdup(hname)) == NULL)
					fatal("strdup");
			}
			if ($$->path == NULL &&
			    ($$->path = strdup("/")) == NULL)
				fatal("strdup");
		}
		;

listen_opts	:	{ opts_default(); }
		  listen_opts_l
			{ $$ = opts; }
		|	{ opts_default(); $$ = opts; }
		;
listen_opts_l	: listen_opts_l listen_opt
		| listen_opt
		;
listen_opt	: rtable
		;

server_opts	:	{ opts_default(); }
		  server_opts_l
			{ $$ = opts; }
		|	{ opts_default(); $$ = opts; }
		;
server_opts_l	: server_opts_l server_opt
		| server_opt
		;
server_opt	: weight
		;

sensor_opts	:	{ opts_default(); }
		  sensor_opts_l
			{ $$ = opts; }
		|	{ opts_default(); $$ = opts; }
		;
sensor_opts_l	: sensor_opts_l sensor_opt
		| sensor_opt
		;
sensor_opt	: correction
		| refid
		| stratum
		| weight
		;

correction	: CORRECTION NUMBER {
			if ($2 < -127000000 || $2 > 127000000) {
				yyerror("correction must be between "
				    "-127000000 and 127000000 microseconds");
				YYERROR;
			}
			opts.correction = $2;
		}
		;

refid		: REFID STRING {
			size_t l = strlen($2);

			if (l < 1 || l > 4) {
				yyerror("refid must be 1 to 4 characters");
				free($2);
				YYERROR;
			}
			opts.refstr = $2;
		}
		;

stratum		: STRATUM NUMBER {
			if ($2 < 1 || $2 > 15) {
				yyerror("stratum must be between "
				    "1 and 15");
				YYERROR;
			}
			opts.stratum = $2;
		}
		;

weight		: WEIGHT NUMBER	{
			if ($2 < 1 || $2 > 10) {
				yyerror("weight must be between 1 and 10");
				YYERROR;
			}
			opts.weight = $2;
		}
rtable		: RTABLE NUMBER {
			if ($2 < 0 || $2 > RT_TABLEID_MAX) {
				yyerror("rtable must be between 1"
				    " and RT_TABLEID_MAX");
				YYERROR;
			}
			opts.rtable = $2;
		}
		;

%%

void
opts_default(void)
{
	memset(&opts, 0, sizeof opts);
	opts.weight = 1;
	opts.stratum = 1;
}

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);
	log_warnx("%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[] = {
		{ "constraint",		CONSTRAINT},
		{ "constraints",	CONSTRAINTS},
		{ "correction",		CORRECTION},
		{ "from",		FROM},
		{ "listen",		LISTEN},
		{ "on",			ON},
		{ "query",		QUERY},
		{ "refid",		REFID},
		{ "rtable",		RTABLE},
		{ "sensor",		SENSOR},
		{ "server",		SERVER},
		{ "servers",		SERVERS},
		{ "stratum",		STRATUM},
		{ "weight",		WEIGHT}
	};
	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;
	int	 quotec, next, c;
	int	 token;

	p = buf;
	while ((c = lgetc(0)) == ' ' || c == '\t')
		; /* nothing */

	yylval.lineno = file->lineno;
	if (c == '#')
		while ((c = lgetc(0)) != '\n' && c != EOF)
			; /* nothing */

	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)
			fatal("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 != '=' && x != '/' && x != '#' && \
	x != ','))

	if (isalnum(c) || 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)
				fatal("yylex: strdup");
		return (token);
	}
	if (c == '\n') {
		yylval.lineno = file->lineno;
		file->lineno++;
	}
	if (c == EOF)
		return (0);
	return (c);
}

struct file *
pushfile(const char *name)
{
	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);
	}
	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);
}

int
parse_config(const char *filename, struct ntpd_conf *xconf)
{
	int		 errors = 0;

	conf = xconf;
	TAILQ_INIT(&conf->listen_addrs);
	TAILQ_INIT(&conf->ntp_peers);
	TAILQ_INIT(&conf->ntp_conf_sensors);
	TAILQ_INIT(&conf->constraints);

	if ((file = pushfile(filename)) == NULL) {
		return (-1);
	}
	topfile = file;

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

	return (errors ? -1 : 0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.y,v 1.67 2017/08/11 19:12:21 naddy Exp $ */
2
3			/*
4			* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
5			* Copyright (c) 2001 Markus Friedl. All rights reserved.
6			* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
7			* Copyright (c) 2001 Theo de Raadt. All rights reserved.
8			*
9			* Permission to use, copy, modify, and distribute this software for any
10			* purpose with or without fee is hereby granted, provided that the above
11			* copyright notice and this permission notice appear in all copies.
12			*
13			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20			*/
21
22			%{
23			#include <sys/types.h>
24			#include <sys/socket.h>
25			#include <netinet/in.h>
26			#include <arpa/inet.h>
27
28			#include <ctype.h>
29			#include <errno.h>
30			#include <limits.h>
31			#include <stdarg.h>
32			#include <stdio.h>
33			#include <stdlib.h>
34			#include <string.h>
35			#include <syslog.h>
36
37			#include "ntpd.h"
38
39			TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
40			static struct file {
41			TAILQ_ENTRY(file) entry;
42			FILE *stream;
43			char *name;
44			int lineno;
45			int errors;
46			} file, topfile;
47			struct file pushfile(const char );
48			int popfile(void);
49			int yyparse(void);
50			int yylex(void);
51			int yyerror(const char *, ...)
52			__attribute__((__format__ (printf, 1, 2)))
53			__attribute__((__nonnull__ (1)));
54			int kw_cmp(const void , const void );
55			int lookup(char *);
56			int lgetc(int);
57			int lungetc(int);
58			int findeol(void);
59
60			struct ntpd_conf *conf;
61			struct sockaddr_in query_addr4;
62			struct sockaddr_in6 query_addr6;
63
64			struct opts {
65			int weight;
66			int correction;
67			int stratum;
68			int rtable;
69			char *refstr;
70			} opts;
71			void opts_default(void);
72
73			typedef struct {
74			union {
75			int64_t number;
76			char *string;
77			struct ntp_addr_wrap *addr;
78			struct opts opts;
79			} v;
80			int lineno;
81			} YYSTYPE;
82
83			%}
84
85			%token LISTEN ON CONSTRAINT CONSTRAINTS FROM QUERY
86			%token SERVER SERVERS SENSOR CORRECTION RTABLE REFID STRATUM WEIGHT
87			%token ERROR
88			%token <v.string> STRING
89			%token <v.number> NUMBER
90			%type <v.addr> address url
91			%type <v.opts> listen_opts listen_opts_l listen_opt
92			%type <v.opts> server_opts server_opts_l server_opt
93			%type <v.opts> sensor_opts sensor_opts_l sensor_opt
94			%type <v.opts> correction
95			%type <v.opts> rtable
96			%type <v.opts> refid
97			%type <v.opts> stratum
98			%type <v.opts> weight
99			%%
100
101			grammar : /* empty */
102			\| grammar '\n'
103			\| grammar main '\n'
104			\| grammar error '\n' { file->errors++; }
105			;
106
107			main : LISTEN ON address listen_opts {
108			struct listen_addr *la;
109			struct ntp_addr h, next;
110
111			if ((h = $3->a) == NULL &&
112			(host_dns($3->name, &h) == -1 \|\| !h)) {
113			yyerror("could not resolve \"%s\"", $3->name);
114			free($3->name);
115			free($3);
116			YYERROR;
117			}
118
119			for (; h != NULL; h = next) {
120			next = h->next;
121			la = calloc(1, sizeof(struct listen_addr));
122			if (la == NULL)
123			fatal("listen on calloc");
124			la->fd = -1;
125			la->rtable = $4.rtable;
126			memcpy(&la->sa, &h->ss,
127			sizeof(struct sockaddr_storage));
128			TAILQ_INSERT_TAIL(&conf->listen_addrs, la,
129			entry);
130			free(h);
131			}
132			free($3->name);
133			free($3);
134			}
135			\| QUERY FROM STRING {
136			struct sockaddr_in sin4;
137			struct sockaddr_in6 sin6;
138
139			memset(&sin4, 0, sizeof(sin4));
140			sin4.sin_family = AF_INET;
141			sin4.sin_len = sizeof(struct sockaddr_in);
142			memset(&sin6, 0, sizeof(sin6));
143			sin6.sin6_family = AF_INET6;
144			sin6.sin6_len = sizeof(struct sockaddr_in6);
145
146			if (inet_pton(AF_INET, $3, &sin4.sin_addr) == 1)
147			memcpy(&query_addr4, &sin4, sin4.sin_len);
148			else if (inet_pton(AF_INET6, $3, &sin6.sin6_addr) == 1)
149			memcpy(&query_addr6, &sin6, sin6.sin6_len);
150			else {
151			yyerror("invalid IPv4 or IPv6 address: %s\n",
152			$3);
153			free($3);
154			YYERROR;
155			}
156
157			free($3);
158			}
159			\| SERVERS address server_opts {
160			struct ntp_peer *p;
161			struct ntp_addr h, next;
162
163			h = $2->a;
164			do {
165			if (h != NULL) {
166			next = h->next;
167			if (h->ss.ss_family != AF_INET &&
168			h->ss.ss_family != AF_INET6) {
169			yyerror("IPv4 or IPv6 address "
170			"or hostname expected");
171			free(h);
172			free($2->name);
173			free($2);
174			YYERROR;
175			}
176			h->next = NULL;
177			} else
178			next = NULL;
179
180			p = new_peer();
181			p->weight = $3.weight;
182			p->query_addr4 = query_addr4;
183			p->query_addr6 = query_addr6;
184			p->addr = h;
185			p->addr_head.a = h;
186			p->addr_head.pool = 1;
187			p->addr_head.name = strdup($2->name);
188			if (p->addr_head.name == NULL)
189			fatal(NULL);
190			if (p->addr != NULL)
191			p->state = STATE_DNS_DONE;
192			TAILQ_INSERT_TAIL(&conf->ntp_peers, p, entry);
193			h = next;
194			} while (h != NULL);
195
196			free($2->name);
197			free($2);
198			}
199			\| SERVER address server_opts {
200			struct ntp_peer *p;
201			struct ntp_addr h, next;
202
203			p = new_peer();
204			for (h = $2->a; h != NULL; h = next) {
205			next = h->next;
206			if (h->ss.ss_family != AF_INET &&
207			h->ss.ss_family != AF_INET6) {
208			yyerror("IPv4 or IPv6 address "
209			"or hostname expected");
210			free(h);
211			free(p);
212			free($2->name);
213			free($2);
214			YYERROR;
215			}
216			h->next = p->addr;
217			p->addr = h;
218			}
219
220			p->weight = $3.weight;
221			p->query_addr4 = query_addr4;
222			p->query_addr6 = query_addr6;
223			p->addr_head.a = p->addr;
224			p->addr_head.pool = 0;
225			p->addr_head.name = strdup($2->name);
226			if (p->addr_head.name == NULL)
227			fatal(NULL);
228			if (p->addr != NULL)
229			p->state = STATE_DNS_DONE;
230			TAILQ_INSERT_TAIL(&conf->ntp_peers, p, entry);
231			free($2->name);
232			free($2);
233			}
234			\| CONSTRAINTS FROM url {
235			struct constraint *p;
236			struct ntp_addr h, next;
237
238			h = $3->a;
239			do {
240			if (h != NULL) {
241			next = h->next;
242			if (h->ss.ss_family != AF_INET &&
243			h->ss.ss_family != AF_INET6) {
244			yyerror("IPv4 or IPv6 address "
245			"or hostname expected");
246			free(h);
247			free($3->name);
248			free($3->path);
249			free($3);
250			YYERROR;
251			}
252			h->next = NULL;
253			} else
254			next = NULL;
255
256			p = new_constraint();
257			p->addr = h;
258			p->addr_head.a = h;
259			p->addr_head.pool = 1;
260			p->addr_head.name = strdup($3->name);
261			p->addr_head.path = strdup($3->path);
262			if (p->addr_head.name == NULL \|\|
263			p->addr_head.path == NULL)
264			fatal(NULL);
265			if (p->addr != NULL)
266			p->state = STATE_DNS_DONE;
267			constraint_add(p);
268			h = next;
269			} while (h != NULL);
270
271			free($3->name);
272			free($3);
273			}
274			\| CONSTRAINT FROM url {
275			struct constraint *p;
276			struct ntp_addr h, next;
277
278			p = new_constraint();
279			for (h = $3->a; h != NULL; h = next) {
280			next = h->next;
281			if (h->ss.ss_family != AF_INET &&
282			h->ss.ss_family != AF_INET6) {
283			yyerror("IPv4 or IPv6 address "
284			"or hostname expected");
285			free(h);
286			free(p);
287			free($3->name);
288			free($3->path);
289			free($3);
290			YYERROR;
291			}
292			h->next = p->addr;
293			p->addr = h;
294			}
295
296			p->addr_head.a = p->addr;
297			p->addr_head.pool = 0;
298			p->addr_head.name = strdup($3->name);
299			p->addr_head.path = strdup($3->path);
300			if (p->addr_head.name == NULL \|\|
301			p->addr_head.path == NULL)
302			fatal(NULL);
303			if (p->addr != NULL)
304			p->state = STATE_DNS_DONE;
305			constraint_add(p);
306			free($3->name);
307			free($3);
308			}
309			\| SENSOR STRING sensor_opts {
310			struct ntp_conf_sensor *s;
311
312			s = new_sensor($2);
313			s->weight = $3.weight;
314			s->correction = $3.correction;
315			s->refstr = $3.refstr;
316			s->stratum = $3.stratum;
317			free($2);
318			TAILQ_INSERT_TAIL(&conf->ntp_conf_sensors, s, entry);
319			}
320			;
321
322			address : STRING {
323			if (($$ = calloc(1, sizeof(struct ntp_addr_wrap))) ==
324			NULL)
325			fatal(NULL);
326			host($1, &$$->a);
327			$$->name = $1;
328			}
329			;
330
331			url : STRING {
332			char hname, path;
333
334			if (($$ = calloc(1, sizeof(struct ntp_addr_wrap))) ==
335			NULL)
336			fatal("calloc");
337
338			if (strncmp("https://", $1,
339			strlen("https://")) != 0) {
340			host($1, &$$->a);
341			$$->name = $1;
342			} else {
343			hname = $1 + strlen("https://");
344
345			path = hname + strcspn(hname, "/\\");
346			if (*path != '\0') {
347			if (($$->path = strdup(path)) == NULL)
348			fatal("strdup");
349			*path = '\0';
350			}
351			host(hname, &$$->a);
352			if (($$->name = strdup(hname)) == NULL)
353			fatal("strdup");
354			}
355			if ($$->path == NULL &&
356			($$->path = strdup("/")) == NULL)
357			fatal("strdup");
358			}
359			;
360
361			listen_opts : { opts_default(); }
362			listen_opts_l
363			{ $$ = opts; }
364			\| { opts_default(); $$ = opts; }
365			;
366			listen_opts_l : listen_opts_l listen_opt
367			\| listen_opt
368			;
369			listen_opt : rtable
370			;
371
372			server_opts : { opts_default(); }
373			server_opts_l
374			{ $$ = opts; }
375			\| { opts_default(); $$ = opts; }
376			;
377			server_opts_l : server_opts_l server_opt
378			\| server_opt
379			;
380			server_opt : weight
381			;
382
383			sensor_opts : { opts_default(); }
384			sensor_opts_l
385			{ $$ = opts; }
386			\| { opts_default(); $$ = opts; }
387			;
388			sensor_opts_l : sensor_opts_l sensor_opt
389			\| sensor_opt
390			;
391			sensor_opt : correction
392			\| refid
393			\| stratum
394			\| weight
395			;
396
397			correction : CORRECTION NUMBER {
398			if ($2 < -127000000 \|\| $2 > 127000000) {
399			yyerror("correction must be between "
400			"-127000000 and 127000000 microseconds");
401			YYERROR;
402			}
403			opts.correction = $2;
404			}
405			;
406
407			refid : REFID STRING {
408			size_t l = strlen($2);
409
410			if (l < 1 \|\| l > 4) {
411			yyerror("refid must be 1 to 4 characters");
412			free($2);
413			YYERROR;
414			}
415			opts.refstr = $2;
416			}
417			;
418
419			stratum : STRATUM NUMBER {
420			if ($2 < 1 \|\| $2 > 15) {
421			yyerror("stratum must be between "
422			"1 and 15");
423			YYERROR;
424			}
425			opts.stratum = $2;
426			}
427			;
428
429			weight : WEIGHT NUMBER {
430			if ($2 < 1 \|\| $2 > 10) {
431			yyerror("weight must be between 1 and 10");
432			YYERROR;
433			}
434			opts.weight = $2;
435			}
436			rtable : RTABLE NUMBER {
437			if ($2 < 0 \|\| $2 > RT_TABLEID_MAX) {
438			yyerror("rtable must be between 1"
439			" and RT_TABLEID_MAX");
440			YYERROR;
441			}
442			opts.rtable = $2;
443			}
444			;
445
446			%%
447
448			void
449			opts_default(void)
450			{
451			memset(&opts, 0, sizeof opts);
452			opts.weight = 1;
453			opts.stratum = 1;
454			}
455
456			struct keywords {
457			const char *k_name;
458			int k_val;
459			};
460
461			int
462			yyerror(const char *fmt, ...)
463			{
464			va_list ap;
465			char *msg;
466
467			file->errors++;
468			va_start(ap, fmt);
469			if (vasprintf(&msg, fmt, ap) == -1)
470			fatalx("yyerror vasprintf");
471			va_end(ap);
472			log_warnx("%s:%d: %s", file->name, yylval.lineno, msg);
473			free(msg);
474			return (0);
475			}
476
477			int
478			kw_cmp(const void k, const void e)
479			{
480			return (strcmp(k, ((const struct keywords *)e)->k_name));
481			}
482
483			int
484			lookup(char *s)
485			{
486			/* this has to be sorted always */
487			static const struct keywords keywords[] = {
488			{ "constraint", CONSTRAINT},
489			{ "constraints", CONSTRAINTS},
490			{ "correction", CORRECTION},
491			{ "from", FROM},
492			{ "listen", LISTEN},
493			{ "on", ON},
494			{ "query", QUERY},
495			{ "refid", REFID},
496			{ "rtable", RTABLE},
497			{ "sensor", SENSOR},
498			{ "server", SERVER},
499			{ "servers", SERVERS},
500			{ "stratum", STRATUM},
501			{ "weight", WEIGHT}
502			};
503			const struct keywords *p;
504
505			p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
506			sizeof(keywords[0]), kw_cmp);
507
508			if (p)
509			return (p->k_val);
510			else
511			return (STRING);
512			}
513
514			#define MAXPUSHBACK 128
515
516			u_char *parsebuf;
517			int parseindex;
518			u_char pushback_buffer[MAXPUSHBACK];
519			int pushback_index = 0;
520
521			int
522			lgetc(int quotec)
523			{
524			int c, next;
525
526			if (parsebuf) {
527			/* Read character from the parsebuffer instead of input. */
528			if (parseindex >= 0) {
529			c = parsebuf[parseindex++];
530			if (c != '\0')
531			return (c);
532			parsebuf = NULL;
533			} else
534			parseindex++;
535			}
536
537			if (pushback_index)
538			return (pushback_buffer[--pushback_index]);
539
540			if (quotec) {
541			if ((c = getc(file->stream)) == EOF) {
542			yyerror("reached end of file while parsing "
543			"quoted string");
544			if (file == topfile \|\| popfile() == EOF)
545			return (EOF);
546			return (quotec);
547			}
548			return (c);
549			}
550
551			while ((c = getc(file->stream)) == '\\') {
552			next = getc(file->stream);
553			if (next != '\n') {
554			c = next;
555			break;
556			}
557			yylval.lineno = file->lineno;
558			file->lineno++;
559			}
560
561			while (c == EOF) {
562			if (file == topfile \|\| popfile() == EOF)
563			return (EOF);
564			c = getc(file->stream);
565			}
566			return (c);
567			}
568
569			int
570			lungetc(int c)
571			{
572			if (c == EOF)
573			return (EOF);
574			if (parsebuf) {
575			parseindex--;
576			if (parseindex >= 0)
577			return (c);
578			}
579			if (pushback_index < MAXPUSHBACK-1)
580			return (pushback_buffer[pushback_index++] = c);
581			else
582			return (EOF);
583			}
584
585			int
586			findeol(void)
587			{
588			int c;
589
590			parsebuf = NULL;
591
592			/* skip to either EOF or the first real EOL */
593			while (1) {
594			if (pushback_index)
595			c = pushback_buffer[--pushback_index];
596			else
597			c = lgetc(0);
598			if (c == '\n') {
599			file->lineno++;
600			break;
601			}
602			if (c == EOF)
603			break;
604			}
605			return (ERROR);
606			}
607
608			int
609			yylex(void)
610			{
611			u_char buf[8096];
612			u_char *p;
613			int quotec, next, c;
614			int token;
615
616			p = buf;
617			while ((c = lgetc(0)) == ' ' \|\| c == '\t')
618			; /* nothing */
619
620			yylval.lineno = file->lineno;
621			if (c == '#')
622			while ((c = lgetc(0)) != '\n' && c != EOF)
623			; /* nothing */
624
625			switch (c) {
626			case '\'':
627			case '"':
628			quotec = c;
629			while (1) {
630			if ((c = lgetc(quotec)) == EOF)
631			return (0);
632			if (c == '\n') {
633			file->lineno++;
634			continue;
635			} else if (c == '\\') {
636			if ((next = lgetc(quotec)) == EOF)
637			return (0);
638			if (next == quotec \|\| c == ' ' \|\| c == '\t')
639			c = next;
640			else if (next == '\n') {
641			file->lineno++;
642			continue;
643			} else
644			lungetc(next);
645			} else if (c == quotec) {
646			*p = '\0';
647			break;
648			} else if (c == '\0') {
649			yyerror("syntax error");
650			return (findeol());
651			}
652			if (p + 1 >= buf + sizeof(buf) - 1) {
653			yyerror("string too long");
654			return (findeol());
655			}
656			*p++ = c;
657			}
658			yylval.v.string = strdup(buf);
659			if (yylval.v.string == NULL)
660			fatal("yylex: strdup");
661			return (STRING);
662			}
663
664			#define allowed_to_end_number(x) \
665			(isspace(x) \|\| x == ')' \|\| x ==',' \|\| x == '/' \|\| x == '}' \|\| x == '=')
666
667			if (c == '-' \|\| isdigit(c)) {
668			do {
669			*p++ = c;
670			if ((unsigned)(p-buf) >= sizeof(buf)) {
671			yyerror("string too long");
672			return (findeol());
673			}
674			} while ((c = lgetc(0)) != EOF && isdigit(c));
675			lungetc(c);
676			if (p == buf + 1 && buf[0] == '-')
677			goto nodigits;
678			if (c == EOF \|\| allowed_to_end_number(c)) {
679			const char *errstr = NULL;
680
681			*p = '\0';
682			yylval.v.number = strtonum(buf, LLONG_MIN,
683			LLONG_MAX, &errstr);
684			if (errstr) {
685			yyerror("\"%s\" invalid number: %s",
686			buf, errstr);
687			return (findeol());
688			}
689			return (NUMBER);
690			} else {
691			nodigits:
692			while (p > buf + 1)
693			lungetc(*--p);
694			c = *--p;
695			if (c == '-')
696			return (c);
697			}
698			}
699
700			#define allowed_in_string(x) \
701			(isalnum(x) \|\| (ispunct(x) && x != '(' && x != ')' && \
702			x != '{' && x != '}' && x != '<' && x != '>' && \
703			x != '!' && x != '=' && x != '/' && x != '#' && \
704			x != ','))
705
706			if (isalnum(c) \|\| c == ':' \|\| c == '_' \|\| c == '*') {
707			do {
708			*p++ = c;
709			if ((unsigned)(p-buf) >= sizeof(buf)) {
710			yyerror("string too long");
711			return (findeol());
712			}
713			} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
714			lungetc(c);
715			*p = '\0';
716			if ((token = lookup(buf)) == STRING)
717			if ((yylval.v.string = strdup(buf)) == NULL)
718			fatal("yylex: strdup");
719			return (token);
720			}
721			if (c == '\n') {
722			yylval.lineno = file->lineno;
723			file->lineno++;
724			}
725			if (c == EOF)
726			return (0);
727			return (c);
728			}
729
730			struct file *
731			pushfile(const char *name)
732			{
733			struct file *nfile;
734
735			if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
736			log_warn("malloc");
737			return (NULL);
738			}
739			if ((nfile->name = strdup(name)) == NULL) {
740			log_warn("malloc");
741			free(nfile);
742			return (NULL);
743			}
744			if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
745			log_warn("%s", nfile->name);
746			free(nfile->name);
747			free(nfile);
748			return (NULL);
749			}
750			nfile->lineno = 1;
751			TAILQ_INSERT_TAIL(&files, nfile, entry);
752			return (nfile);
753			}
754
755			int
756			popfile(void)
757			{
758			struct file *prev;
759
760			if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
761			prev->errors += file->errors;
762
763			TAILQ_REMOVE(&files, file, entry);
764			fclose(file->stream);
765			free(file->name);
766			free(file);
767			file = prev;
768			return (file ? 0 : EOF);
769			}
770
771			int
772			parse_config(const char filename, struct ntpd_conf xconf)
773			{
774			int errors = 0;
775
776			conf = xconf;
777			TAILQ_INIT(&conf->listen_addrs);
778			TAILQ_INIT(&conf->ntp_peers);
779			TAILQ_INIT(&conf->ntp_conf_sensors);
780			TAILQ_INIT(&conf->constraints);
781
782			if ((file = pushfile(filename)) == NULL) {
783			return (-1);
784			}
785			topfile = file;
786
787			yyparse();
788			errors = file->errors;
789			popfile();
790
791			return (errors ? -1 : 0);
792			}