Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	sbin/dhclient/conflex.c	Lines:	0	130	0.0 %
Date:	2017-11-07	Branches:	0	80	0.0 %


/*	$OpenBSD: conflex.c,v 1.43 2017/07/14 16:21:03 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 "dhcp.h"
#include "dhcpd.h"
#include "dhctoken.h"
#include "log.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 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;
}

static int
get_char(FILE *cfile)
{
	int c = getc(cfile);
	if (ugflag == 0) {
		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 ((unsigned int)lpos < sizeof(line1)) {
				cur_line[lpos - 1] = c;
				cur_line[lpos] = 0;
			}
			lpos++;
		}
	} else
		ugflag = 0;
	return c;
}

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

	u = ugflag;

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

		c = get_char(cfile);

		if (isascii(c) != 0 && isspace(c) != 0)
			continue;
		if (c == '#') {
			skip_to_eol(cfile);
			continue;
		}
		lexline = l;
		lexchar = p;
		if (c == '"') {
			ttok = read_string(cfile);
			break;
		} else if (c == '-' || (isascii(c) != 0 && isalnum(c) != 0)) {
			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 != 0) {
		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 != 0)
		*rval = tval;

	return rv;
}

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

	if (token == 0) {
		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 != 0)
		*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.
	 */
	bs = i = 0;
	while ((c = get_char(cfile)) != EOF) {
		if (c == '"' && bs == 0)
			break;

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

		if (i == sizeof(tokbuf) - 1)
			break;
	}
	if (bs == 1)
		i--;

	if (c == EOF)
		parse_warn("eof in string constant");
	else if (c != '"')
		parse_warn("string constant too long");

	tokbuf[i] = '\0';
	tval = tokbuf;

	return TOK_STRING;
}

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

	xdigits = (isxdigit(c) != 0) ? 1 : 0;

	tokbuf[0] = c;
	for (i = 1; i < sizeof(tokbuf); i++) {
		c = get_char(cfile);
		if (isascii(c) == 0 || (c != '-' && c != '_' &&
		    isalnum(c) == 0)) {
			ungetc(c, cfile);
			ugflag = 1;
			break;
		}
		if (isxdigit(c) != 0)
			xdigits++;
		tokbuf[i] = c;
	}
	if (i == sizeof(tokbuf)) {
		parse_warn("token larger than internal buffer");
		i--;
		c = tokbuf[i];
		if (isxdigit(c) != 0)
			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[] = {
	{ "append",				TOK_APPEND },
	{ "backoff-cutoff",			TOK_BACKOFF_CUTOFF },
	{ "bootp",				TOK_BOOTP },
	{ "default",				TOK_DEFAULT },
	{ "deny",				TOK_DENY },
	{ "expire",				TOK_EXPIRE },
	{ "filename",				TOK_FILENAME },
	{ "fixed-address",			TOK_FIXED_ADDR },
	{ "ignore",				TOK_IGNORE },
	{ "initial-interval",			TOK_INITIAL_INTERVAL },
	{ "interface",				TOK_INTERFACE },
	{ "lease",				TOK_LEASE },
	{ "link-timeout",			TOK_LINK_TIMEOUT },
	{ "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 },
	{ "ssid",				TOK_SSID },
	{ "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 != NULL)
		return p->k_val;
	return dfv;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: conflex.c,v 1.43 2017/07/14 16:21:03 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
59			#include "dhcp.h"
60			#include "dhcpd.h"
61			#include "dhctoken.h"
62			#include "log.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
82			static int get_char(FILE *);
83			static int get_token(FILE *);
84			static void skip_to_eol(FILE *);
85			static int read_string(FILE *);
86			static int read_num_or_name(int, FILE *);
87			static int intern(char *, int);
88
89			void
90			new_parse(char *name)
91			{
92			/*
93			* Initialize all parsing state, as we are starting to parse a
94			* new file, 'name'.
95			*/
96
97			memset(line1, 0, sizeof(line1));
98			memset(line2, 0, sizeof(line2));
99			memset(tokbuf, 0, sizeof(tokbuf));
100
101			lpos = line = 1;
102			tlpos = tline = token = ugflag = 0;
103			tval = NULL;
104
105			lexline = lexchar = 0;
106			cur_line = line1;
107			prev_line = line2;
108			token_line = cur_line;
109			tlname = name;
110			}
111
112			static int
113			get_char(FILE *cfile)
114			{
115			int c = getc(cfile);
116			if (ugflag == 0) {
117			if (c == '\n') {
118			if (cur_line == line1) {
119			cur_line = line2;
120			prev_line = line1;
121			} else {
122			cur_line = line1;
123			prev_line = line2;
124			}
125			line++;
126			lpos = 1;
127			cur_line[0] = 0;
128			} else if (c != EOF) {
129			if ((unsigned int)lpos < sizeof(line1)) {
130			cur_line[lpos - 1] = c;
131			cur_line[lpos] = 0;
132			}
133			lpos++;
134			}
135			} else
136			ugflag = 0;
137			return c;
138			}
139
140			static int
141			get_token(FILE *cfile)
142			{
143			static char tb[2];
144			int c, ttok;
145			int l, p, u;
146
147			u = ugflag;
148
149			do {
150			l = line;
151			p = lpos - u;
152			u = 0;
153
154			c = get_char(cfile);
155
156			if (isascii(c) != 0 && isspace(c) != 0)
157			continue;
158			if (c == '#') {
159			skip_to_eol(cfile);
160			continue;
161			}
162			lexline = l;
163			lexchar = p;
164			if (c == '"') {
165			ttok = read_string(cfile);
166			break;
167			} else if (c == '-' \|\| (isascii(c) != 0 && isalnum(c) != 0)) {
168			ttok = read_num_or_name(c, cfile);
169			break;
170			} else {
171			tb[0] = c;
172			tb[1] = 0;
173			tval = tb;
174			ttok = c;
175			break;
176			}
177			} while (1);
178			return ttok;
179			}
180
181			int
182			next_token(char *rval, FILE cfile)
183			{
184			int rv;
185
186			if (token != 0) {
187			if (lexline != tline)
188			token_line = cur_line;
189			lexchar = tlpos;
190			lexline = tline;
191			rv = token;
192			token = 0;
193			} else {
194			rv = get_token(cfile);
195			token_line = cur_line;
196			}
197			if (rval != 0)
198			*rval = tval;
199
200			return rv;
201			}
202
203			int
204			peek_token(char *rval, FILE cfile)
205			{
206			int x;
207
208			if (token == 0) {
209			tlpos = lexchar;
210			tline = lexline;
211			token = get_token(cfile);
212			if (lexline != tline)
213			token_line = prev_line;
214			x = lexchar;
215			lexchar = tlpos;
216			tlpos = x;
217			x = lexline;
218			lexline = tline;
219			tline = x;
220			}
221			if (rval != 0)
222			*rval = tval;
223
224			return token;
225			}
226
227			static void
228			skip_to_eol(FILE *cfile)
229			{
230			int c;
231
232			do {
233			c = get_char(cfile);
234			if (c == EOF)
235			return;
236			if (c == '\n')
237			return;
238			} while (1);
239			}
240
241			static int
242			read_string(FILE *cfile)
243			{
244			int i, c, bs;
245
246			/*
247			* Read in characters until an un-escaped '"' is encountered.
248			*/
249			bs = i = 0;
250			while ((c = get_char(cfile)) != EOF) {
251			if (c == '"' && bs == 0)
252			break;
253
254			tokbuf[i++] = c;
255			if (bs != 0)
256			bs = 0;
257			else if (c == '\\')
258			bs = 1;
259
260			if (i == sizeof(tokbuf) - 1)
261			break;
262			}
263			if (bs == 1)
264			i--;
265
266			if (c == EOF)
267			parse_warn("eof in string constant");
268			else if (c != '"')
269			parse_warn("string constant too long");
270
271			tokbuf[i] = '\0';
272			tval = tokbuf;
273
274			return TOK_STRING;
275			}
276
277			static int
278			read_num_or_name(int c, FILE *cfile)
279			{
280			unsigned int i, xdigits;
281			int rv;
282
283			xdigits = (isxdigit(c) != 0) ? 1 : 0;
284
285			tokbuf[0] = c;
286			for (i = 1; i < sizeof(tokbuf); i++) {
287			c = get_char(cfile);
288			if (isascii(c) == 0 \|\| (c != '-' && c != '_' &&
289			isalnum(c) == 0)) {
290			ungetc(c, cfile);
291			ugflag = 1;
292			break;
293			}
294			if (isxdigit(c) != 0)
295			xdigits++;
296			tokbuf[i] = c;
297			}
298			if (i == sizeof(tokbuf)) {
299			parse_warn("token larger than internal buffer");
300			i--;
301			c = tokbuf[i];
302			if (isxdigit(c) != 0)
303			xdigits--;
304			}
305			tokbuf[i] = 0;
306			tval = tokbuf;
307
308			c = (unsigned int)tokbuf[0];
309
310			if (c == '-')
311			rv = TOK_NUMBER;
312			else
313			rv = intern(tval, TOK_NUMBER_OR_NAME);
314
315			if (rv == TOK_NUMBER_OR_NAME && xdigits != i)
316			rv = TOK_NAME;
317
318			return rv;
319			}
320
321			static const struct keywords {
322			const char *k_name;
323			int k_val;
324			} keywords[] = {
325			{ "append", TOK_APPEND },
326			{ "backoff-cutoff", TOK_BACKOFF_CUTOFF },
327			{ "bootp", TOK_BOOTP },
328			{ "default", TOK_DEFAULT },
329			{ "deny", TOK_DENY },
330			{ "expire", TOK_EXPIRE },
331			{ "filename", TOK_FILENAME },
332			{ "fixed-address", TOK_FIXED_ADDR },
333			{ "ignore", TOK_IGNORE },
334			{ "initial-interval", TOK_INITIAL_INTERVAL },
335			{ "interface", TOK_INTERFACE },
336			{ "lease", TOK_LEASE },
337			{ "link-timeout", TOK_LINK_TIMEOUT },
338			{ "next-server", TOK_NEXT_SERVER },
339			{ "option", TOK_OPTION },
340			{ "prepend", TOK_PREPEND },
341			{ "rebind", TOK_REBIND },
342			{ "reboot", TOK_REBOOT },
343			{ "reject", TOK_REJECT },
344			{ "renew", TOK_RENEW },
345			{ "request", TOK_REQUEST },
346			{ "require", TOK_REQUIRE },
347			{ "retry", TOK_RETRY },
348			{ "select-timeout", TOK_SELECT_TIMEOUT },
349			{ "send", TOK_SEND },
350			{ "server-name", TOK_SERVER_NAME },
351			{ "ssid", TOK_SSID },
352			{ "supersede", TOK_SUPERSEDE },
353			{ "timeout", TOK_TIMEOUT }
354			};
355
356			int kw_cmp(const void k, const void e);
357
358			int
359			kw_cmp(const void k, const void e)
360			{
361			return strcasecmp(k, ((const struct keywords *)e)->k_name);
362			}
363
364			static int
365			intern(char *atom, int dfv)
366			{
367			const struct keywords *p;
368
369			p = bsearch(atom, keywords, sizeof(keywords)/sizeof(keywords[0]),
370			sizeof(keywords[0]), kw_cmp);
371			if (p != NULL)
372			return p->k_val;
373			return dfv;
374			}