Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/switchd/parse.y	Lines:	108	267	40.4 %
Date:	2017-11-07	Branches:	68	195	34.9 %


/*	$OpenBSD: parse.y,v 1.6 2017/08/28 06:00:05 florian Exp $	*/

/*
 * Copyright (c) 2007-2016 Reyk Floeter <reyk@openbsd.org>
 * Copyright (c) 2004, 2005 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/queue.h>
#include <sys/stat.h>
#include <sys/un.h>

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <netdb.h>
#include <stdarg.h>
#include <stdio.h>
#include <syslog.h>
#include <unistd.h>

#include "switchd.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		 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);
int		 host(const char *, struct sockaddr *, socklen_t);

struct switchd *conf;

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 *);

typedef struct {
	union {
		int64_t		 number;
		char		*string;
		in_port_t	 port;
		struct switch_client
				*conn;
	} v;
	int lineno;
} YYSTYPE;

%}

%token	INCLUDE ERROR LISTEN ON TLS PORT DEVICE FORWARD TO
%token	<v.string>	STRING
%token  <v.number>	NUMBER
%type	<v.number>	opttls
%type	<v.conn>	optofcconn
%type	<v.port>	port

%%

grammar		: /* empty */
		| grammar '\n'
		| grammar include '\n'
		| grammar listen '\n'
		| grammar device '\n'
		| grammar varset '\n'
		| grammar error '\n'		{ file->errors++; }
		;

include		: INCLUDE STRING		{
			struct file	*nfile;

			if ((nfile = pushfile($2, 0)) == NULL) {
				yyerror("failed to include file %s", $2);
				free($2);
				YYERROR;
			}
			free($2);

			file = nfile;
			lungetc('\n');
		}
		;

listen		: LISTEN ON STRING opttls port {
			if (host($3,
			    (struct sockaddr *)&conf->sc_server.srv_addr,
			    sizeof(conf->sc_server.srv_addr)) != 0) {
				free($3);
				YYERROR;
			}
			free($3);
			conf->sc_server.srv_tls = $4;
			((struct sockaddr_in *)&conf->sc_server.srv_addr)
			    ->sin_port = $5;
		}
		| LISTEN ON STRING opttls {
			if (host($3,
			    (struct sockaddr *)&conf->sc_server.srv_addr,
			    sizeof(conf->sc_server.srv_addr)) != 0) {
				free($3);
				YYERROR;
			}
			free($3);
		}
		;

port		: PORT NUMBER {
			if ($2 <= 0 || $2 > (int)USHRT_MAX) {
				yyerror("invalid port: %lld", $2);
				YYERROR;
			}
			$$ = htons($2);
		}
		;

opttls		: /* empty */	{ $$ = 0; }
		| TLS		{ $$ = 1; }
		;

device		: DEVICE STRING optofcconn {
			struct switch_client		*c;
			struct switch_address		 s;
			struct sockaddr_un		*un;

			memset(&s, 0, sizeof(s));
			un = (struct sockaddr_un *)&s.swa_addr;

			if (*$2 != '/') {
				yyerror("not an absolute path: %s", $2);
				free($2);
				YYERROR;
			}

			un->sun_family = AF_LOCAL;
			un->sun_len = sizeof(*un);
			if (strlcpy(un->sun_path, $2,
			    sizeof(un->sun_path)) >= sizeof(un->sun_path)) {
				yyerror("device name is too long: %s", $2);
				free($2);
				YYERROR;
			}
			free($2);

			TAILQ_FOREACH(c, &conf->sc_clients, swc_next) {
				if (sockaddr_cmp((struct sockaddr *)
				    &c->swc_addr.swa_addr,
				    (struct sockaddr *)&s.swa_addr, -1) == 0)
					break;
			}
			if (c != NULL) {
				yyerror("device name is duplicated");
				YYERROR;
			}

			memcpy(&$3->swc_addr, &s, sizeof(s));

			TAILQ_INSERT_TAIL(&conf->sc_clients, $3, swc_next);
		}
		;

optofcconn	: /* empty */ {
			if (($$ = calloc(1,
			    sizeof(struct switch_client))) == NULL)
				fatal("calloc");
			$$->swc_addr.swa_type = $$->swc_target.swa_type =
			    SWITCH_CONN_LOCAL;
		}
		| FORWARD TO STRING {
			size_t	 len;

			if (($$ = calloc(1,
			    sizeof(struct switch_client))) == NULL)
				fatal("calloc");
			len = 4;
			if (strncmp($3, "tcp:", len) == 0)
				$$->swc_target.swa_type = SWITCH_CONN_TCP;
			else if (strncmp($3, "tls:", len) == 0)
				$$->swc_target.swa_type = SWITCH_CONN_TLS;
			else {
				len = 0;
				$$->swc_target.swa_type = SWITCH_CONN_TCP;
			}
			if (parsehostport($3 + len,
			    (struct sockaddr *)&$$->swc_target.swa_addr,
			    sizeof($$->swc_target.swa_addr)) == -1) {
				yyerror("could not parse host and port part "
				    "of forward target");
				free($$);
				free($3);
				YYERROR;
			}
			free($3);
		}
		;

varset		: STRING '=' STRING	{
			if (symset($1, $3, 0) == -1)
				fatal("cannot store variable");
			free($1);
			free($3);
		}
		;

%%

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)
		fatal("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[] = {
		{ "device",		DEVICE },
		{ "forward",		FORWARD },
		{ "include",		INCLUDE },
		{ "listen",		LISTEN },
		{ "on",			ON },
		{ "port",		PORT },
		{ "tls",		TLS },
		{ "to",			TO },
	};
	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++;
	}
	if (c == '\t' || c == ' ') {
		/* Compress blanks to a single space. */
		do {
			c = getc(file->stream);
		} while (c == '\t' || c == ' ');
		ungetc(c, file->stream);
		c = ' ';
	}

	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)
			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 != ','))

	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, 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) {
		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 switchd *sc)
{
	struct sym		*sym;
	int			 errors = 0;
	struct sockaddr_in	*sin4;

	conf = sc;

	/* Set the default 0.0.0.0 6633/tcp */
	memset(&conf->sc_server.srv_addr, 0, sizeof(conf->sc_server.srv_addr));
	sin4 = (struct sockaddr_in *)&conf->sc_server.srv_addr;
	sin4->sin_family = AF_INET;
	sin4->sin_port = htons(SWITCHD_CTLR_PORT);
	sin4->sin_len = sizeof(struct sockaddr_in);

	if ((file = pushfile(filename, 0)) == NULL) {
		log_warn("failed to open %s", filename);
		return (0);
	}
	topfile = file;
	setservent(1);

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

	endservent();

	/* Free macros and check which have not been used. */
	while ((sym = TAILQ_FIRST(&symhead))) {
		if (!sym->used)
			log_debug("warning: macro '%s' not "
			    "used\n", sym->nam);
		free(sym->nam);
		free(sym->val);
		TAILQ_REMOVE(&symhead, sym, entry);
		free(sym);
	}

	return (errors ? -1 : 0);
}

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

	(void)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);
}

int
host(const char *str, struct sockaddr *sa, socklen_t salen)
{
	struct addrinfo  hints, *ai0;
	int		 error;

	memset(&hints, 0, sizeof(hints));
	hints.ai_flags = AI_NUMERICHOST;
	hints.ai_family = AF_UNSPEC;

	if ((error = getaddrinfo(str, NULL, &hints, &ai0)) != 0) {
		yyerror("invalid listen address: %s: %s", str,
		    gai_strerror(error));
		return (-1);
	}
	if (salen >= ai0->ai_addrlen)
		memcpy(sa, ai0->ai_addr, ai0->ai_addrlen);
	else {
		yyerror("addrlen is invalid: %d", (int)ai0->ai_addrlen);
		freeaddrinfo(ai0);
		return (-1);
	}
	freeaddrinfo(ai0);

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parse.y,v 1.6 2017/08/28 06:00:05 florian Exp $ */
2
3			/*
4			* Copyright (c) 2007-2016 Reyk Floeter <reyk@openbsd.org>
5			* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
6			* Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
7			* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
8			* Copyright (c) 2001 Markus Friedl. All rights reserved.
9			* Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
10			* Copyright (c) 2001 Theo de Raadt. All rights reserved.
11			*
12			* Permission to use, copy, modify, and distribute this software for any
13			* purpose with or without fee is hereby granted, provided that the above
14			* copyright notice and this permission notice appear in all copies.
15			*
16			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
17			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
18			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
19			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
21			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
22			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23			*/
24
25			%{
26			#include <sys/types.h>
27			#include <sys/queue.h>
28			#include <sys/stat.h>
29			#include <sys/un.h>
30
31			#include <ctype.h>
32			#include <errno.h>
33			#include <limits.h>
34			#include <netdb.h>
35			#include <stdarg.h>
36			#include <stdio.h>
37			#include <syslog.h>
38			#include <unistd.h>
39
40			#include "switchd.h"
41
42			TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
43			static struct file {
44			TAILQ_ENTRY(file) entry;
45			FILE *stream;
46			char *name;
47			int lineno;
48			int errors;
49			} file, topfile;
50			struct file pushfile(const char , int);
51			int popfile(void);
52			int yyparse(void);
53			int yylex(void);
54			int yyerror(const char *, ...)
55			__attribute__((__format__ (printf, 1, 2)))
56			__attribute__((__nonnull__ (1)));
57			int kw_cmp(const void , const void );
58			int lookup(char *);
59			int lgetc(int);
60			int lungetc(int);
61			int findeol(void);
62			int host(const char , struct sockaddr , socklen_t);
63
64			struct switchd *conf;
65
66			TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
67			struct sym {
68			TAILQ_ENTRY(sym) entry;
69			int used;
70			int persist;
71			char *nam;
72			char *val;
73			};
74			int symset(const char , const char , int);
75			char symget(const char );
76
77			typedef struct {
78			union {
79			int64_t number;
80			char *string;
81			in_port_t port;
82			struct switch_client
83			*conn;
84			} v;
85			int lineno;
86			} YYSTYPE;
87
88			%}
89
90			%token INCLUDE ERROR LISTEN ON TLS PORT DEVICE FORWARD TO
91			%token <v.string> STRING
92			%token <v.number> NUMBER
93			%type <v.number> opttls
94			%type <v.conn> optofcconn
95			%type <v.port> port
96
97			%%
98
99			grammar : /* empty */
100			\| grammar '\n'
101			\| grammar include '\n'
102			\| grammar listen '\n'
103			\| grammar device '\n'
104			\| grammar varset '\n'
105			\| grammar error '\n' { file->errors++; }
106			;
107
108			include : INCLUDE STRING {
109			struct file *nfile;
110
111			if ((nfile = pushfile($2, 0)) == NULL) {
112			yyerror("failed to include file %s", $2);
113			free($2);
114			YYERROR;
115			}
116			free($2);
117
118			file = nfile;
119			lungetc('\n');
120			}
121			;
122
123			listen : LISTEN ON STRING opttls port {
124			if (host($3,
125			(struct sockaddr *)&conf->sc_server.srv_addr,
126			sizeof(conf->sc_server.srv_addr)) != 0) {
127			free($3);
128			YYERROR;
129			}
130			free($3);
131			conf->sc_server.srv_tls = $4;
132			((struct sockaddr_in *)&conf->sc_server.srv_addr)
133			->sin_port = $5;
134			}
135			\| LISTEN ON STRING opttls {
136			if (host($3,
137			(struct sockaddr *)&conf->sc_server.srv_addr,
138			sizeof(conf->sc_server.srv_addr)) != 0) {
139			free($3);
140			YYERROR;
141			}
142			free($3);
143			}
144			;
145
146			port : PORT NUMBER {
147			if ($2 <= 0 \|\| $2 > (int)USHRT_MAX) {
148			yyerror("invalid port: %lld", $2);
149			YYERROR;
150			}
151			$$ = htons($2);
152			}
153			;
154
155			opttls : /* empty */ { $$ = 0; }
156			\| TLS { $$ = 1; }
157			;
158
159			device : DEVICE STRING optofcconn {
160			struct switch_client *c;
161			struct switch_address s;
162			struct sockaddr_un *un;
163
164			memset(&s, 0, sizeof(s));
165			un = (struct sockaddr_un *)&s.swa_addr;
166
167			if (*$2 != '/') {
168			yyerror("not an absolute path: %s", $2);
169			free($2);
170			YYERROR;
171			}
172
173			un->sun_family = AF_LOCAL;
174			un->sun_len = sizeof(*un);
175			if (strlcpy(un->sun_path, $2,
176			sizeof(un->sun_path)) >= sizeof(un->sun_path)) {
177			yyerror("device name is too long: %s", $2);
178			free($2);
179			YYERROR;
180			}
181			free($2);
182
183			TAILQ_FOREACH(c, &conf->sc_clients, swc_next) {
184			if (sockaddr_cmp((struct sockaddr *)
185			&c->swc_addr.swa_addr,
186			(struct sockaddr *)&s.swa_addr, -1) == 0)
187			break;
188			}
189			if (c != NULL) {
190			yyerror("device name is duplicated");
191			YYERROR;
192			}
193
194			memcpy(&$3->swc_addr, &s, sizeof(s));
195
196			TAILQ_INSERT_TAIL(&conf->sc_clients, $3, swc_next);
197			}
198			;
199
200			optofcconn : /* empty */ {
201			if (($$ = calloc(1,
202			sizeof(struct switch_client))) == NULL)
203			fatal("calloc");
204			$$->swc_addr.swa_type = $$->swc_target.swa_type =
205			SWITCH_CONN_LOCAL;
206			}
207			\| FORWARD TO STRING {
208			size_t len;
209
210			if (($$ = calloc(1,
211			sizeof(struct switch_client))) == NULL)
212			fatal("calloc");
213			len = 4;
214			if (strncmp($3, "tcp:", len) == 0)
215			$$->swc_target.swa_type = SWITCH_CONN_TCP;
216			else if (strncmp($3, "tls:", len) == 0)
217			$$->swc_target.swa_type = SWITCH_CONN_TLS;
218			else {
219			len = 0;
220			$$->swc_target.swa_type = SWITCH_CONN_TCP;
221			}
222			if (parsehostport($3 + len,
223			(struct sockaddr *)&$$->swc_target.swa_addr,
224			sizeof($$->swc_target.swa_addr)) == -1) {
225			yyerror("could not parse host and port part "
226			"of forward target");
227			free($$);
228			free($3);
229			YYERROR;
230			}
231			free($3);
232			}
233			;
234
235			varset : STRING '=' STRING {
236			if (symset($1, $3, 0) == -1)
237			fatal("cannot store variable");
238			free($1);
239			free($3);
240			}
241			;
242
243			%%
244
245			struct keywords {
246			const char *k_name;
247			int k_val;
248			};
249
250			int
251			yyerror(const char *fmt, ...)
252			{
253			va_list ap;
254			char *msg;
255
256			file->errors++;
257			va_start(ap, fmt);
258			if (vasprintf(&msg, fmt, ap) == -1)
259			fatal("yyerror vasprintf");
260			va_end(ap);
261			log_warnx("%s:%d: %s", file->name, yylval.lineno, msg);
262			free(msg);
263			return (0);
264			}
265
266			int
267			kw_cmp(const void k, const void e)
268			{
269		330	return (strcmp(k, ((const struct keywords *)e)->k_name));
270			}
271
272			int
273			lookup(char *s)
274			{
275			/* this has to be sorted always */
276			static const struct keywords keywords[] = {
277			{ "device", DEVICE },
278			{ "forward", FORWARD },
279			{ "include", INCLUDE },
280			{ "listen", LISTEN },
281			{ "on", ON },
282			{ "port", PORT },
283			{ "tls", TLS },
284			{ "to", TO },
285			};
286			const struct keywords *p;
287
288		120	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
289			sizeof(keywords[0]), kw_cmp);
290
291	✓✓	60	if (p)
292		45	return (p->k_val);
293			else
294		15	return (STRING);
295		60	}
296
297			#define MAXPUSHBACK 128
298
299			u_char *parsebuf;
300			int parseindex;
301			u_char pushback_buffer[MAXPUSHBACK];
302			int pushback_index = 0;
303
304			int
305			lgetc(int quotec)
306			{
307			int c, next;
308
309	✗✓	1940	if (parsebuf) {
310			/* Read character from the parsebuffer instead of input. */
311			if (parseindex >= 0) {
312			c = parsebuf[parseindex++];
313			if (c != '\0')
314			return (c);
315			parsebuf = NULL;
316			} else
317			parseindex++;
318			}
319
320	✓✓	970	if (pushback_index)
321		120	return (pushback_buffer[--pushback_index]);
322
323	✗✓	850	if (quotec) {
324			if ((c = getc(file->stream)) == EOF) {
325			yyerror("reached end of file while parsing "
326			"quoted string");
327			if (file == topfile \|\| popfile() == EOF)
328			return (EOF);
329			return (quotec);
330			}
331			return (c);
332			}
333
334	✓✗✓✓ ✗✓	3400	while ((c = getc(file->stream)) == '\\') {
335			next = getc(file->stream);
336			if (next != '\n') {
337			c = next;
338			break;
339			}
340			yylval.lineno = file->lineno;
341			file->lineno++;
342			}
343	✓✓	850	if (c == '\t' \|\| c == ' ') {
344			/* Compress blanks to a single space. */
345			do {
346	✓✗✗✓	360	c = getc(file->stream);
347	✗✓	90	} while (c == '\t' \|\| c == ' ');
348		90	ungetc(c, file->stream);
349			c = ' ';
350		90	}
351
352	✓✓	850	while (c == EOF) {
353	✗✓✗✗	15	if (file == topfile \|\| popfile() == EOF)
354		15	return (EOF);
355			c = getc(file->stream);
356			}
357		835	return (c);
358		970	}
359
360			int
361			lungetc(int c)
362			{
363	✗✓	240	if (c == EOF)
364			return (EOF);
365	✗✓	120	if (parsebuf) {
366			parseindex--;
367			if (parseindex >= 0)
368			return (c);
369			}
370	✓✗	120	if (pushback_index < MAXPUSHBACK-1)
371		120	return (pushback_buffer[pushback_index++] = c);
372			else
373			return (EOF);
374		120	}
375
376			int
377			findeol(void)
378			{
379			int c;
380
381			parsebuf = NULL;
382
383			/* skip to either EOF or the first real EOL */
384			while (1) {
385			if (pushback_index)
386			c = pushback_buffer[--pushback_index];
387			else
388			c = lgetc(0);
389			if (c == '\n') {
390			file->lineno++;
391			break;
392			}
393			if (c == EOF)
394			break;
395			}
396			return (ERROR);
397			}
398
399			int
400			yylex(void)
401			{
402		240	u_char buf[8096];
403			u_char p, val;
404			int quotec, next, c;
405		120	int token;
406
407			top:
408		120	p = buf;
409	✓✓	300	while ((c = lgetc(0)) == ' ' \|\| c == '\t')
410			; /* nothing */
411
412		120	yylval.lineno = file->lineno;
413	✓✓	120	if (c == '#')
414	✓✓	370	while ((c = lgetc(0)) != '\n' && c != EOF)
415			; /* nothing */
416	✗✓	120	if (c == '$' && parsebuf == NULL) {
417			while (1) {
418			if ((c = lgetc(0)) == EOF)
419			return (0);
420
421			if (p + 1 >= buf + sizeof(buf) - 1) {
422			yyerror("string too long");
423			return (findeol());
424			}
425			if (isalnum(c) \|\| c == '_') {
426			*p++ = c;
427			continue;
428			}
429			*p = '\0';
430			lungetc(c);
431			break;
432			}
433			val = symget(buf);
434			if (val == NULL) {
435			yyerror("macro '%s' not defined", buf);
436			return (findeol());
437			}
438			parsebuf = val;
439			parseindex = 0;
440			goto top;
441			}
442
443	✗✗✓	120	switch (c) {
444			case '\'':
445			case '"':
446			quotec = c;
447			while (1) {
448			if ((c = lgetc(quotec)) == EOF)
449			return (0);
450			if (c == '\n') {
451			file->lineno++;
452			continue;
453			} else if (c == '\\') {
454			if ((next = lgetc(quotec)) == EOF)
455			return (0);
456			if (next == quotec \|\| c == ' ' \|\| c == '\t')
457			c = next;
458			else if (next == '\n') {
459			file->lineno++;
460			continue;
461			} else
462			lungetc(next);
463			} else if (c == quotec) {
464			*p = '\0';
465			break;
466			} else if (c == '\0') {
467			yyerror("syntax error");
468			return (findeol());
469			}
470			if (p + 1 >= buf + sizeof(buf) - 1) {
471			yyerror("string too long");
472			return (findeol());
473			}
474			*p++ = c;
475			}
476			yylval.v.string = strdup(buf);
477			if (yylval.v.string == NULL)
478			fatal("yylex: strdup");
479			return (STRING);
480			}
481
482			#define allowed_to_end_number(x) \
483			(isspace(x) \|\| x == ')' \|\| x ==',' \|\| x == '/' \|\| x == '}' \|\| x == '=')
484
485	✓✗✓✓	240	if (c == '-' \|\| isdigit(c)) {
486			do {
487		105	*p++ = c;
488	✗✓	105	if ((unsigned)(p-buf) >= sizeof(buf)) {
489			yyerror("string too long");
490			return (findeol());
491			}
492	✓✗✓✓	210	} while ((c = lgetc(0)) != EOF && isdigit(c));
493		30	lungetc(c);
494	✗✓✗✗	30	if (p == buf + 1 && buf[0] == '-')
495			goto nodigits;
496	✓✗✓✓	60	if (c == EOF \|\| allowed_to_end_number(c)) {
497		15	const char *errstr = NULL;
498
499		15	*p = '\0';
500		15	yylval.v.number = strtonum(buf, LLONG_MIN,
501			LLONG_MAX, &errstr);
502	✗✓	15	if (errstr) {
503			yyerror("\"%s\" invalid number: %s",
504			buf, errstr);
505			return (findeol());
506			}
507		15	return (NUMBER);
508		15	} else {
509			nodigits:
510	✓✓	75	while (p > buf + 1)
511		30	lungetc(*--p);
512			c = *--p;
513	✗✓	15	if (c == '-')
514			return (c);
515			}
516			}
517
518			#define allowed_in_string(x) \
519			(isalnum(x) \|\| (ispunct(x) && x != '(' && x != ')' && \
520			x != '{' && x != '}' && \
521			x != '!' && x != '=' && x != '#' && \
522			x != ','))
523
524	✓✓	105	if (isalnum(c) \|\| c == ':' \|\| c == '_' \|\| c == '/') {
525			do {
526		315	*p++ = c;
527	✗✓	315	if ((unsigned)(p-buf) >= sizeof(buf)) {
528			yyerror("string too long");
529			return (findeol());
530			}
531	✓✗✓✓ ✓✓	735	} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
532		60	lungetc(c);
533		60	*p = '\0';
534	✓✓	60	if ((token = lookup(buf)) == STRING)
535	✗✓	15	if ((yylval.v.string = strdup(buf)) == NULL)
536			fatal("yylex: strdup");
537		60	return (token);
538			}
539	✓✓	45	if (c == '\n') {
540		30	yylval.lineno = file->lineno;
541		30	file->lineno++;
542		30	}
543	✓✓	45	if (c == EOF)
544		15	return (0);
545		30	return (c);
546		120	}
547
548			struct file *
549			pushfile(const char *name, int secret)
550			{
551			struct file *nfile;
552
553	✗✓	30	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
554			log_warn("malloc");
555			return (NULL);
556			}
557	✗✓	15	if ((nfile->name = strdup(name)) == NULL) {
558			log_warn("malloc");
559			free(nfile);
560			return (NULL);
561			}
562	✗✓	15	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
563			free(nfile->name);
564			free(nfile);
565			return (NULL);
566			}
567		15	nfile->lineno = 1;
568		15	TAILQ_INSERT_TAIL(&files, nfile, entry);
569		15	return (nfile);
570		15	}
571
572			int
573			popfile(void)
574			{
575			struct file *prev;
576
577	✗✓	30	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
578			prev->errors += file->errors;
579
580	✗✓	30	TAILQ_REMOVE(&files, file, entry);
581		15	fclose(file->stream);
582		15	free(file->name);
583		15	free(file);
584		15	file = prev;
585		15	return (file ? 0 : EOF);
586			}
587
588			int
589			parse_config(const char filename, struct switchd sc)
590			{
591			struct sym *sym;
592			int errors = 0;
593			struct sockaddr_in *sin4;
594
595		30	conf = sc;
596
597			/* Set the default 0.0.0.0 6633/tcp */
598		15	memset(&conf->sc_server.srv_addr, 0, sizeof(conf->sc_server.srv_addr));
599		15	sin4 = (struct sockaddr_in *)&conf->sc_server.srv_addr;
600		15	sin4->sin_family = AF_INET;
601		15	sin4->sin_port = htons(SWITCHD_CTLR_PORT);
602		15	sin4->sin_len = sizeof(struct sockaddr_in);
603
604	✗✓	15	if ((file = pushfile(filename, 0)) == NULL) {
605			log_warn("failed to open %s", filename);
606			return (0);
607			}
608		15	topfile = file;
609		15	setservent(1);
610
611		15	yyparse();
612		15	errors = file->errors;
613		15	popfile();
614
615		15	endservent();
616
617			/* Free macros and check which have not been used. */
618	✗✓	30	while ((sym = TAILQ_FIRST(&symhead))) {
619			if (!sym->used)
620			log_debug("warning: macro '%s' not "
621			"used\n", sym->nam);
622			free(sym->nam);
623			free(sym->val);
624			TAILQ_REMOVE(&symhead, sym, entry);
625			free(sym);
626			}
627
628		15	return (errors ? -1 : 0);
629		15	}
630
631			int
632			symset(const char nam, const char val, int persist)
633			{
634			struct sym *sym;
635
636			TAILQ_FOREACH(sym, &symhead, entry) {
637			if (strcmp(nam, sym->nam) == 0)
638			break;
639			}
640
641			if (sym != NULL) {
642			if (sym->persist == 1)
643			return (0);
644			else {
645			free(sym->nam);
646			free(sym->val);
647			TAILQ_REMOVE(&symhead, sym, entry);
648			free(sym);
649			}
650			}
651			if ((sym = calloc(1, sizeof(*sym))) == NULL)
652			return (-1);
653
654			sym->nam = strdup(nam);
655			if (sym->nam == NULL) {
656			free(sym);
657			return (-1);
658			}
659			sym->val = strdup(val);
660			if (sym->val == NULL) {
661			free(sym->nam);
662			free(sym);
663			return (-1);
664			}
665			sym->used = 0;
666			sym->persist = persist;
667			TAILQ_INSERT_TAIL(&symhead, sym, entry);
668			return (0);
669			}
670
671			int
672			cmdline_symset(char *s)
673			{
674			char sym, val;
675			int ret;
676			size_t len;
677
678			if ((val = strrchr(s, '=')) == NULL)
679			return (-1);
680
681			len = (val - s) + 1;
682			if ((sym = malloc(len)) == NULL)
683			fatal("cmdline_symset: malloc");
684
685			(void)strlcpy(sym, s, len);
686
687			ret = symset(sym, val + 1, 1);
688			free(sym);
689
690			return (ret);
691			}
692
693			char *
694			symget(const char *nam)
695			{
696			struct sym *sym;
697
698			TAILQ_FOREACH(sym, &symhead, entry) {
699			if (strcmp(nam, sym->nam) == 0) {
700			sym->used = 1;
701			return (sym->val);
702			}
703			}
704			return (NULL);
705			}
706
707			int
708			host(const char str, struct sockaddr sa, socklen_t salen)
709			{
710		30	struct addrinfo hints, *ai0;
711			int error;
712
713		15	memset(&hints, 0, sizeof(hints));
714		15	hints.ai_flags = AI_NUMERICHOST;
715		15	hints.ai_family = AF_UNSPEC;
716
717	✗✓	15	if ((error = getaddrinfo(str, NULL, &hints, &ai0)) != 0) {
718			yyerror("invalid listen address: %s: %s", str,
719			gai_strerror(error));
720			return (-1);
721			}
722	✓✗	15	if (salen >= ai0->ai_addrlen)
723		15	memcpy(sa, ai0->ai_addr, ai0->ai_addrlen);
724			else {
725			yyerror("addrlen is invalid: %d", (int)ai0->ai_addrlen);
726			freeaddrinfo(ai0);
727			return (-1);
728			}
729		15	freeaddrinfo(ai0);
730
731		15	return (0);
732		15	}