Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/dhclient/conflex.c	Lines:	0	138	0.0 %
Date:	2016-12-06	Branches:	0	80	0.0 %


/*	$OpenBSD: conflex.c,v 1.33 2016/02/06 19:30:52 krw Exp $	*/

/* Lexical scanner for dhclient config file. */

/*
 * Copyright (c) 1995, 1996, 1997 The Internet Software Consortium.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of The Internet Software Consortium nor the names
 *    of its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * This software has been written for the Internet Software Consortium
 * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
 * Enterprises.  To learn more about the Internet Software Consortium,
 * see ``http://www.vix.com/isc''.  To learn more about Vixie
 * Enterprises, see ``http://www.vix.com''.
 */

#include <sys/queue.h>
#include <sys/socket.h>

#include <arpa/inet.h>

#include <net/if.h>

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <ctype.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vis.h>

#include "dhcp.h"
#include "dhcpd.h"
#include "dhctoken.h"

int lexline;
int lexchar;
char *token_line;
char *prev_line;
char *cur_line;
char *tlname;

static char line1[81];
static char line2[81];
static int lpos;
static int line;
static int tlpos;
static int tline;
static int token;
static int ugflag;
static char *tval;
static char tokbuf[1500];
static char visbuf[1500];

static int get_char(FILE *);
static int get_token(FILE *);
static void skip_to_eol(FILE *);
static int read_string(FILE *);
static int read_num_or_name(int, FILE *);
static int intern(char *, int);

void
new_parse(char *name)
{
	/*
	 * Initialize all parsing state, as we are starting to parse a
	 * new file, 'name'.
	 */

	memset(line1, 0, sizeof(line1));
	memset(line2, 0, sizeof(line2));
	memset(tokbuf, 0, sizeof(tokbuf));

	lpos = line = 1;
	tlpos = tline = token = ugflag = 0;
	tval = NULL;

	lexline = lexchar = 0;
	cur_line = line1;
	prev_line = line2;
	token_line = cur_line;
	tlname = name;

	warnings_occurred = 0;
}

static int
get_char(FILE *cfile)
{
	int c = getc(cfile);
	if (!ugflag) {
		if (c == '\n') {
			if (cur_line == line1) {
				cur_line = line2;
				prev_line = line1;
			} else {
				cur_line = line1;
				prev_line = line2;
			}
			line++;
			lpos = 1;
			cur_line[0] = 0;
		} else if (c != EOF) {
			if (lpos < sizeof(line1)) {
				cur_line[lpos - 1] = c;
				cur_line[lpos] = 0;
			}
			lpos++;
		}
	} else
		ugflag = 0;
	return (c);
}

static int
get_token(FILE *cfile)
{
	int		c, ttok;
	static char	tb[2];
	int		l, p, u;

	u = ugflag;

	do {
		l = line;
		p = lpos - u;
		u = 0;

		c = get_char(cfile);

		if (isascii(c) && isspace(c))
			continue;
		if (c == '#') {
			skip_to_eol(cfile);
			continue;
		}
		lexline = l;
		lexchar = p;
		if (c == '"') {
			ttok = read_string(cfile);
			break;
		} else if (c == '-' || (isascii(c) && isalnum(c))) {
			ttok = read_num_or_name(c, cfile);
			break;
		} else {
			tb[0] = c;
			tb[1] = 0;
			tval = tb;
			ttok = c;
			break;
		}
	} while (1);
	return (ttok);
}

int
next_token(char **rval, FILE *cfile)
{
	int	rv;

	if (token) {
		if (lexline != tline)
			token_line = cur_line;
		lexchar = tlpos;
		lexline = tline;
		rv = token;
		token = 0;
	} else {
		rv = get_token(cfile);
		token_line = cur_line;
	}
	if (rval)
		*rval = tval;

	return (rv);
}

int
peek_token(char **rval, FILE *cfile)
{
	int	x;

	if (!token) {
		tlpos = lexchar;
		tline = lexline;
		token = get_token(cfile);
		if (lexline != tline)
			token_line = prev_line;
		x = lexchar;
		lexchar = tlpos;
		tlpos = x;
		x = lexline;
		lexline = tline;
		tline = x;
	}
	if (rval)
		*rval = tval;

	return (token);
}

static void
skip_to_eol(FILE *cfile)
{
	int	c;

	do {
		c = get_char(cfile);
		if (c == EOF)
			return;
		if (c == '\n')
			return;
	} while (1);
}

static int
read_string(FILE *cfile)
{
	int i, c, bs;

	/*
	 * Read in characters until an un-escaped '"' is encountered. And
	 * then unvis the data that was read.
	 */
	bs = i = 0;
	memset(visbuf, 0, sizeof(visbuf));
	while ((c = get_char(cfile)) != EOF) {
		if (c == '"' && bs == 0)
			break;

		visbuf[i++] = c;
		if (bs)
			bs = 0;
		else if (c == '\\')
			bs = 1;

		if (i == sizeof(visbuf) - 1)
			break;
	}
	if (bs == 1)
		visbuf[--i] = '\0';
	i = strnunvis(tokbuf, visbuf, sizeof(tokbuf));

	if (c == EOF)
		parse_warn("eof in string constant");
	else if (i == -1 || i >= sizeof(tokbuf))
		parse_warn("string constant too long");

	tval = tokbuf;

	return (TOK_STRING);
}

static int
read_num_or_name(int c, FILE *cfile)
{
	int i, rv, xdigits;

	xdigits = isxdigit(c) ? 1 : 0;

	tokbuf[0] = c;
	for (i = 1; i < sizeof(tokbuf); i++) {
		c = get_char(cfile);
		if (!isascii(c) || (c != '-' && c != '_' && !isalnum(c))) {
			ungetc(c, cfile);
			ugflag = 1;
			break;
		}
		if (isxdigit(c))
			xdigits++;
		tokbuf[i] = c;
	}
	if (i == sizeof(tokbuf)) {
		parse_warn("token larger than internal buffer");
		i--;
		c = tokbuf[i];
		if (isxdigit(c))
			xdigits--;
	}
	tokbuf[i] = 0;
	tval = tokbuf;

	c = (unsigned int)tokbuf[0];

	if (c == '-')
		rv = TOK_NUMBER;
	else
		rv = intern(tval, TOK_NUMBER_OR_NAME);

	if (rv == TOK_NUMBER_OR_NAME && xdigits != i)
		rv = TOK_NAME;

	return (rv);
}

static const struct keywords {
	const char	*k_name;
	int		k_val;
} keywords[] = {
	{ "alias",				TOK_ALIAS },
	{ "append",				TOK_APPEND },
	{ "backoff-cutoff",			TOK_BACKOFF_CUTOFF },
	{ "bootp",				TOK_BOOTP },
	{ "default",				TOK_DEFAULT },
	{ "deny",				TOK_DENY },
	{ "ethernet",				TOK_ETHERNET },
	{ "expire",				TOK_EXPIRE },
	{ "filename",				TOK_FILENAME },
	{ "fixed-address",			TOK_FIXED_ADDR },
	{ "hardware",				TOK_HARDWARE },
	{ "ignore",				TOK_IGNORE },
	{ "initial-interval",			TOK_INITIAL_INTERVAL },
	{ "interface",				TOK_INTERFACE },
	{ "lease",				TOK_LEASE },
	{ "link-timeout",			TOK_LINK_TIMEOUT },
	{ "media",				TOK_MEDIA },
	{ "medium",				TOK_MEDIUM },
	{ "next-server",			TOK_NEXT_SERVER },
	{ "option",				TOK_OPTION },
	{ "prepend",				TOK_PREPEND },
	{ "rebind",				TOK_REBIND },
	{ "reboot",				TOK_REBOOT },
	{ "reject",				TOK_REJECT },
	{ "renew",				TOK_RENEW },
	{ "request",				TOK_REQUEST },
	{ "require",				TOK_REQUIRE },
	{ "retry",				TOK_RETRY },
	{ "select-timeout",			TOK_SELECT_TIMEOUT },
	{ "send",				TOK_SEND },
	{ "server-name",			TOK_SERVER_NAME },
	{ "supersede",				TOK_SUPERSEDE },
	{ "timeout",				TOK_TIMEOUT }
};

int	kw_cmp(const void *k, const void *e);

int
kw_cmp(const void *k, const void *e)
{
	return (strcasecmp(k, ((const struct keywords *)e)->k_name));
}

static int
intern(char *atom, int dfv)
{
	const struct keywords *p;

	p = bsearch(atom, keywords, sizeof(keywords)/sizeof(keywords[0]),
	    sizeof(keywords[0]), kw_cmp);
	if (p)
		return (p->k_val);
	return (dfv);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: conflex.c,v 1.33 2016/02/06 19:30:52 krw Exp $ */
2
3			/* Lexical scanner for dhclient config file. */
4
5			/*
6			* Copyright (c) 1995, 1996, 1997 The Internet Software Consortium.
7			* All rights reserved.
8			*
9			* Redistribution and use in source and binary forms, with or without
10			* modification, are permitted provided that the following conditions
11			* are met:
12			*
13			* 1. Redistributions of source code must retain the above copyright
14			* notice, this list of conditions and the following disclaimer.
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in the
17			* documentation and/or other materials provided with the distribution.
18			* 3. Neither the name of The Internet Software Consortium nor the names
19			* of its contributors may be used to endorse or promote products derived
20			* from this software without specific prior written permission.
21			*
22			* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
23			* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24			* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25			* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26			* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
27			* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29			* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
30			* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31			* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32			* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33			* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34			* SUCH DAMAGE.
35			*
36			* This software has been written for the Internet Software Consortium
37			* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
38			* Enterprises. To learn more about the Internet Software Consortium,
39			* see ``http://www.vix.com/isc''. To learn more about Vixie
40			* Enterprises, see ``http://www.vix.com''.
41			*/
42
43			#include <sys/queue.h>
44			#include <sys/socket.h>
45
46			#include <arpa/inet.h>
47
48			#include <net/if.h>
49
50			#include <netinet/in.h>
51			#include <netinet/if_ether.h>
52
53			#include <ctype.h>
54			#include <signal.h>
55			#include <stdio.h>
56			#include <stdlib.h>
57			#include <string.h>
58			#include <vis.h>
59
60			#include "dhcp.h"
61			#include "dhcpd.h"
62			#include "dhctoken.h"
63
64			int lexline;
65			int lexchar;
66			char *token_line;
67			char *prev_line;
68			char *cur_line;
69			char *tlname;
70
71			static char line1[81];
72			static char line2[81];
73			static int lpos;
74			static int line;
75			static int tlpos;
76			static int tline;
77			static int token;
78			static int ugflag;
79			static char *tval;
80			static char tokbuf[1500];
81			static char visbuf[1500];
82
83			static int get_char(FILE *);
84			static int get_token(FILE *);
85			static void skip_to_eol(FILE *);
86			static int read_string(FILE *);
87			static int read_num_or_name(int, FILE *);
88			static int intern(char *, int);
89
90			void
91			new_parse(char *name)
92			{
93			/*
94			* Initialize all parsing state, as we are starting to parse a
95			* new file, 'name'.
96			*/
97
98			memset(line1, 0, sizeof(line1));
99			memset(line2, 0, sizeof(line2));
100			memset(tokbuf, 0, sizeof(tokbuf));
101
102			lpos = line = 1;
103			tlpos = tline = token = ugflag = 0;
104			tval = NULL;
105
106			lexline = lexchar = 0;
107			cur_line = line1;
108			prev_line = line2;
109			token_line = cur_line;
110			tlname = name;
111
112			warnings_occurred = 0;
113			}
114
115			static int
116			get_char(FILE *cfile)
117			{
118			int c = getc(cfile);
119			if (!ugflag) {
120			if (c == '\n') {
121			if (cur_line == line1) {
122			cur_line = line2;
123			prev_line = line1;
124			} else {
125			cur_line = line1;
126			prev_line = line2;
127			}
128			line++;
129			lpos = 1;
130			cur_line[0] = 0;
131			} else if (c != EOF) {
132			if (lpos < sizeof(line1)) {
133			cur_line[lpos - 1] = c;
134			cur_line[lpos] = 0;
135			}
136			lpos++;
137			}
138			} else
139			ugflag = 0;
140			return (c);
141			}
142
143			static int
144			get_token(FILE *cfile)
145			{
146			int c, ttok;
147			static char tb[2];
148			int l, p, u;
149
150			u = ugflag;
151
152			do {
153			l = line;
154			p = lpos - u;
155			u = 0;
156
157			c = get_char(cfile);
158
159			if (isascii(c) && isspace(c))
160			continue;
161			if (c == '#') {
162			skip_to_eol(cfile);
163			continue;
164			}
165			lexline = l;
166			lexchar = p;
167			if (c == '"') {
168			ttok = read_string(cfile);
169			break;
170			} else if (c == '-' \|\| (isascii(c) && isalnum(c))) {
171			ttok = read_num_or_name(c, cfile);
172			break;
173			} else {
174			tb[0] = c;
175			tb[1] = 0;
176			tval = tb;
177			ttok = c;
178			break;
179			}
180			} while (1);
181			return (ttok);
182			}
183
184			int
185			next_token(char *rval, FILE cfile)
186			{
187			int rv;
188
189			if (token) {
190			if (lexline != tline)
191			token_line = cur_line;
192			lexchar = tlpos;
193			lexline = tline;
194			rv = token;
195			token = 0;
196			} else {
197			rv = get_token(cfile);
198			token_line = cur_line;
199			}
200			if (rval)
201			*rval = tval;
202
203			return (rv);
204			}
205
206			int
207			peek_token(char *rval, FILE cfile)
208			{
209			int x;
210
211			if (!token) {
212			tlpos = lexchar;
213			tline = lexline;
214			token = get_token(cfile);
215			if (lexline != tline)
216			token_line = prev_line;
217			x = lexchar;
218			lexchar = tlpos;
219			tlpos = x;
220			x = lexline;
221			lexline = tline;
222			tline = x;
223			}
224			if (rval)
225			*rval = tval;
226
227			return (token);
228			}
229
230			static void
231			skip_to_eol(FILE *cfile)
232			{
233			int c;
234
235			do {
236			c = get_char(cfile);
237			if (c == EOF)
238			return;
239			if (c == '\n')
240			return;
241			} while (1);
242			}
243
244			static int
245			read_string(FILE *cfile)
246			{
247			int i, c, bs;
248
249			/*
250			* Read in characters until an un-escaped '"' is encountered. And
251			* then unvis the data that was read.
252			*/
253			bs = i = 0;
254			memset(visbuf, 0, sizeof(visbuf));
255			while ((c = get_char(cfile)) != EOF) {
256			if (c == '"' && bs == 0)
257			break;
258
259			visbuf[i++] = c;
260			if (bs)
261			bs = 0;
262			else if (c == '\\')
263			bs = 1;
264
265			if (i == sizeof(visbuf) - 1)
266			break;
267			}
268			if (bs == 1)
269			visbuf[--i] = '\0';
270			i = strnunvis(tokbuf, visbuf, sizeof(tokbuf));
271
272			if (c == EOF)
273			parse_warn("eof in string constant");
274			else if (i == -1 \|\| i >= sizeof(tokbuf))
275			parse_warn("string constant too long");
276
277			tval = tokbuf;
278
279			return (TOK_STRING);
280			}
281
282			static int
283			read_num_or_name(int c, FILE *cfile)
284			{
285			int i, rv, xdigits;
286
287			xdigits = isxdigit(c) ? 1 : 0;
288
289			tokbuf[0] = c;
290			for (i = 1; i < sizeof(tokbuf); i++) {
291			c = get_char(cfile);
292			if (!isascii(c) \|\| (c != '-' && c != '_' && !isalnum(c))) {
293			ungetc(c, cfile);
294			ugflag = 1;
295			break;
296			}
297			if (isxdigit(c))
298			xdigits++;
299			tokbuf[i] = c;
300			}
301			if (i == sizeof(tokbuf)) {
302			parse_warn("token larger than internal buffer");
303			i--;
304			c = tokbuf[i];
305			if (isxdigit(c))
306			xdigits--;
307			}
308			tokbuf[i] = 0;
309			tval = tokbuf;
310
311			c = (unsigned int)tokbuf[0];
312
313			if (c == '-')
314			rv = TOK_NUMBER;
315			else
316			rv = intern(tval, TOK_NUMBER_OR_NAME);
317
318			if (rv == TOK_NUMBER_OR_NAME && xdigits != i)
319			rv = TOK_NAME;
320
321			return (rv);
322			}
323
324			static const struct keywords {
325			const char *k_name;
326			int k_val;
327			} keywords[] = {
328			{ "alias", TOK_ALIAS },
329			{ "append", TOK_APPEND },
330			{ "backoff-cutoff", TOK_BACKOFF_CUTOFF },
331			{ "bootp", TOK_BOOTP },
332			{ "default", TOK_DEFAULT },
333			{ "deny", TOK_DENY },
334			{ "ethernet", TOK_ETHERNET },
335			{ "expire", TOK_EXPIRE },
336			{ "filename", TOK_FILENAME },
337			{ "fixed-address", TOK_FIXED_ADDR },
338			{ "hardware", TOK_HARDWARE },
339			{ "ignore", TOK_IGNORE },
340			{ "initial-interval", TOK_INITIAL_INTERVAL },
341			{ "interface", TOK_INTERFACE },
342			{ "lease", TOK_LEASE },
343			{ "link-timeout", TOK_LINK_TIMEOUT },
344			{ "media", TOK_MEDIA },
345			{ "medium", TOK_MEDIUM },
346			{ "next-server", TOK_NEXT_SERVER },
347			{ "option", TOK_OPTION },
348			{ "prepend", TOK_PREPEND },
349			{ "rebind", TOK_REBIND },
350			{ "reboot", TOK_REBOOT },
351			{ "reject", TOK_REJECT },
352			{ "renew", TOK_RENEW },
353			{ "request", TOK_REQUEST },
354			{ "require", TOK_REQUIRE },
355			{ "retry", TOK_RETRY },
356			{ "select-timeout", TOK_SELECT_TIMEOUT },
357			{ "send", TOK_SEND },
358			{ "server-name", TOK_SERVER_NAME },
359			{ "supersede", TOK_SUPERSEDE },
360			{ "timeout", TOK_TIMEOUT }
361			};
362
363			int kw_cmp(const void k, const void e);
364
365			int
366			kw_cmp(const void k, const void e)
367			{
368			return (strcasecmp(k, ((const struct keywords *)e)->k_name));
369			}
370
371			static int
372			intern(char *atom, int dfv)
373			{
374			const struct keywords *p;
375
376			p = bsearch(atom, keywords, sizeof(keywords)/sizeof(keywords[0]),
377			sizeof(keywords[0]), kw_cmp);
378			if (p)
379			return (p->k_val);
380			return (dfv);
381			}