Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/npppctl/parser.c	Lines:	0	89	0.0 %
Date:	2017-11-13	Branches:	0	80	0.0 %


/*	$OpenBSD: parser.c,v 1.3 2015/01/19 01:48:57 deraadt Exp $	*/

/* This file is derived from OpenBSD:src/usr.sbin/ikectl/parser.c 1.9 */
/*
 * Copyright (c) 2010 Reyk Floeter <reyk@vantronix.net>
 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
 *
 * 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/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

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

#include "parser.h"

enum token_type {
	NOTOKEN,
	ENDTOKEN,
	KEYWORD,
	PPP_ID,
	ADDRESS,
	INTERFACE,
	PROTOCOL,
	REALM,
	USERNAME
};

struct token {
	enum token_type		 type;
	const char		*keyword;
	int			 value;
	const struct token	*next;
};

static struct parse_result res;

static const struct token t_main[];
static const struct token t_session[];
static const struct token t_clear[];
static const struct token t_monitor[];
static const struct token t_filter[];
static const struct token t_ppp_id[];
static const struct token t_address[];
static const struct token t_interface[];
static const struct token t_protocol[];
static const struct token t_realm[];
static const struct token t_username[];

static const struct token t_main[] = {
	{ KEYWORD,	"session",	NONE,		t_session },
	{ KEYWORD,	"clear",	NONE,		t_clear },
	{ KEYWORD,	"monitor",	NONE,		t_monitor },
	{ ENDTOKEN,	"",		NONE,		NULL }
};

static const struct token t_session[] = {
	{ KEYWORD,	"brief",	SESSION_BRIEF,	NULL },
	{ KEYWORD,	"packets",	SESSION_PKTS,	NULL },
	{ KEYWORD,	"all",		SESSION_ALL,	t_filter },
	{ ENDTOKEN,	"",		NONE,		NULL }
};

static const struct token t_clear[] = {
	{ KEYWORD,	"all",		CLEAR_SESSION,	NULL },
	{ KEYWORD,	"ppp-id",	CLEAR_SESSION,	t_ppp_id },
	{ KEYWORD,	"address",	CLEAR_SESSION,	t_address },
	{ KEYWORD,	"interface",	CLEAR_SESSION,	t_interface },
	{ KEYWORD,	"protocol",	CLEAR_SESSION,	t_protocol },
	{ KEYWORD,	"realm",	CLEAR_SESSION,	t_realm },
	{ KEYWORD,	"username",	CLEAR_SESSION,	t_username },
	{ ENDTOKEN,	"",		CLEAR_SESSION,	NULL }
};

static const struct token t_monitor[] = {
	{ KEYWORD,	"all",		MONITOR_SESSION,	NULL },
	{ KEYWORD,	"ppp-id",	MONITOR_SESSION,	t_ppp_id },
	{ KEYWORD,	"address",	MONITOR_SESSION,	t_address },
	{ KEYWORD,	"interface",	MONITOR_SESSION,	t_interface },
	{ KEYWORD,	"protocol",	MONITOR_SESSION,	t_protocol },
	{ KEYWORD,	"realm",	MONITOR_SESSION,	t_realm },
	{ KEYWORD,	"username",	MONITOR_SESSION,	t_username },
	{ ENDTOKEN,	"",		MONITOR_SESSION,	NULL }
};

static const struct token t_filter[] = {
	{ NOTOKEN,	"",		NONE,		NULL },
	{ KEYWORD,	"ppp-id",	NONE,		t_ppp_id },
	{ KEYWORD,	"address",	NONE,		t_address },
	{ KEYWORD,	"interface",	NONE,		t_interface },
	{ KEYWORD,	"protocol",	NONE,		t_protocol },
	{ KEYWORD,	"realm",	NONE,		t_realm },
	{ KEYWORD,	"username",	NONE,		t_username },
	{ ENDTOKEN,	"",		NONE,		NULL }
};

static const struct token t_ppp_id[] = {
	{ PPP_ID,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};
static const struct token t_address[] = {
	{ ADDRESS,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};
static const struct token t_interface[] = {
	{ INTERFACE,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};
static const struct token t_protocol[] = {
	{ PROTOCOL,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};
static const struct token t_realm[] = {
	{ REALM,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};
static const struct token t_username[] = {
	{ USERNAME,	"",		NONE,			t_filter },
	{ ENDTOKEN,	"",		NONE,			NULL }
};

static const struct token	*match_token(char *, const struct token []);
static void			 show_valid_args(const struct token []);

struct parse_result *
parse(int argc, char *argv[])
{
	const struct token	*table = t_main;
	const struct token	*match;

	bzero(&res, sizeof(res));

	while (argc >= 0) {
		if ((match = match_token(argv[0], table)) == NULL) {
			fprintf(stderr, "valid commands/args:\n");
			show_valid_args(table);
			return (NULL);
		}

		argc--;
		argv++;

		if (match->type == NOTOKEN || match->next == NULL)
			break;

		table = match->next;
	}

	if (argc > 0) {
		fprintf(stderr, "superfluous argument: %s\n", argv[0]);
		return (NULL);
	}

	return (&res);
}

static const struct token *
match_token(char *word, const struct token table[])
{
	u_int			 i, match = 0;
	unsigned long int	 ulval;
	const struct token	*t = NULL;
	char			*ep;

	for (i = 0; table[i].type != ENDTOKEN; i++) {
		switch (table[i].type) {
		case NOTOKEN:
			if (word == NULL || strlen(word) == 0) {
				match++;
				t = &table[i];
			}
			break;
		case KEYWORD:

			if (word != NULL && strncmp(word, table[i].keyword,
			    strlen(word)) == 0) {
				match++;
				t = &table[i];
				if (t->value)
					res.action = t->value;
			}
			break;
		case PPP_ID:
			if (word == NULL)
				break;
			errno = 0;
			ulval = strtoul(word, &ep, 10);
			if (isdigit((unsigned char)*word) && *ep == '\0' &&
			    !(errno == ERANGE && ulval == ULONG_MAX)) {
				res.ppp_id = ulval;
				res.has_ppp_id = 1;
				match++;
				t = &table[i];
			}
			break;
		case ADDRESS:
		    {
			struct sockaddr_in sin4 = {
				.sin_family = AF_INET,
				.sin_len = sizeof(struct sockaddr_in)
			};
			struct sockaddr_in6 sin6 = {
				.sin6_family = AF_INET6,
				.sin6_len = sizeof(struct sockaddr_in6)
			};
			if (word == NULL)
				break;
			if (inet_pton(AF_INET, word, &sin4.sin_addr) == 1)
				memcpy(&res.address, &sin4, sin4.sin_len);
			else
			if (inet_pton(AF_INET6, word, &sin6.sin6_addr) == 1)
				memcpy(&res.address, &sin6, sin6.sin6_len);
			else
				break;
			match++;
			t = &table[i];
		    }
			break;
		case INTERFACE:
			if (word == NULL)
				break;
			res.interface = word;
			match++;
			t = &table[i];
			break;
		case PROTOCOL:
			if (word == NULL)
				break;
			if ((res.protocol = parse_protocol(word)) ==
			    PROTO_UNSPEC)
				break;
			match++;
			t = &table[i];
			break;
		case REALM:
			if (word == NULL)
				break;
			res.realm = word;
			match++;
			t = &table[i];
			break;
		case USERNAME:
			if (word == NULL)
				break;
			res.username = word;
			match++;
			t = &table[i];
			break;
		case ENDTOKEN:
			break;
		}
	}

	if (match != 1) {
		if (word == NULL)
			fprintf(stderr, "missing argument:\n");
		else if (match > 1)
			fprintf(stderr, "ambiguous argument: %s\n", word);
		else if (match < 1)
			fprintf(stderr, "unknown argument: %s\n", word);
		return (NULL);
	}

	return (t);
}

static void
show_valid_args(const struct token table[])
{
	int	i;

	for (i = 0; table[i].type != ENDTOKEN; i++) {
		switch (table[i].type) {
		case NOTOKEN:
			fprintf(stderr, "  <cr>\n");
			break;
		case KEYWORD:
			fprintf(stderr, "  %s\n", table[i].keyword);
			break;
		case PPP_ID:
			fprintf(stderr, "  <ppp-id>\n");
			break;
		case ADDRESS:
			fprintf(stderr, "  <address>\n");
			break;
		case INTERFACE:
			fprintf(stderr, "  <interface>\n");
			break;
		case PROTOCOL:
			fprintf(stderr, "  [ pppoe | l2tp | pptp | sstp ]\n");
			break;
		case REALM:
			fprintf(stderr, "  <realm>\n");
			break;
		case USERNAME:
			fprintf(stderr, "  <username>\n");
			break;
		case ENDTOKEN:
			break;
		}
	}
}

enum protocol
parse_protocol(const char *str)
{
	return
	    (strcasecmp(str, "PPTP" ) == 0)? PPTP  :
	    (strcasecmp(str, "L2TP" ) == 0)? L2TP  :
	    (strcasecmp(str, "PPPoE") == 0)? PPPOE :
	    (strcasecmp(str, "SSTP" ) == 0)? SSTP  : PROTO_UNSPEC;
}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.3 2015/01/19 01:48:57 deraadt Exp $ */
2
3			/* This file is derived from OpenBSD:src/usr.sbin/ikectl/parser.c 1.9 */
4			/*
5			* Copyright (c) 2010 Reyk Floeter <reyk@vantronix.net>
6			* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
7			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
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			#include <sys/socket.h>
23			#include <netinet/in.h>
24			#include <arpa/inet.h>
25
26			#include <ctype.h>
27			#include <errno.h>
28			#include <limits.h>
29			#include <stdio.h>
30			#include <stdlib.h>
31			#include <string.h>
32
33			#include "parser.h"
34
35			enum token_type {
36			NOTOKEN,
37			ENDTOKEN,
38			KEYWORD,
39			PPP_ID,
40			ADDRESS,
41			INTERFACE,
42			PROTOCOL,
43			REALM,
44			USERNAME
45			};
46
47			struct token {
48			enum token_type type;
49			const char *keyword;
50			int value;
51			const struct token *next;
52			};
53
54			static struct parse_result res;
55
56			static const struct token t_main[];
57			static const struct token t_session[];
58			static const struct token t_clear[];
59			static const struct token t_monitor[];
60			static const struct token t_filter[];
61			static const struct token t_ppp_id[];
62			static const struct token t_address[];
63			static const struct token t_interface[];
64			static const struct token t_protocol[];
65			static const struct token t_realm[];
66			static const struct token t_username[];
67
68			static const struct token t_main[] = {
69			{ KEYWORD, "session", NONE, t_session },
70			{ KEYWORD, "clear", NONE, t_clear },
71			{ KEYWORD, "monitor", NONE, t_monitor },
72			{ ENDTOKEN, "", NONE, NULL }
73			};
74
75			static const struct token t_session[] = {
76			{ KEYWORD, "brief", SESSION_BRIEF, NULL },
77			{ KEYWORD, "packets", SESSION_PKTS, NULL },
78			{ KEYWORD, "all", SESSION_ALL, t_filter },
79			{ ENDTOKEN, "", NONE, NULL }
80			};
81
82			static const struct token t_clear[] = {
83			{ KEYWORD, "all", CLEAR_SESSION, NULL },
84			{ KEYWORD, "ppp-id", CLEAR_SESSION, t_ppp_id },
85			{ KEYWORD, "address", CLEAR_SESSION, t_address },
86			{ KEYWORD, "interface", CLEAR_SESSION, t_interface },
87			{ KEYWORD, "protocol", CLEAR_SESSION, t_protocol },
88			{ KEYWORD, "realm", CLEAR_SESSION, t_realm },
89			{ KEYWORD, "username", CLEAR_SESSION, t_username },
90			{ ENDTOKEN, "", CLEAR_SESSION, NULL }
91			};
92
93			static const struct token t_monitor[] = {
94			{ KEYWORD, "all", MONITOR_SESSION, NULL },
95			{ KEYWORD, "ppp-id", MONITOR_SESSION, t_ppp_id },
96			{ KEYWORD, "address", MONITOR_SESSION, t_address },
97			{ KEYWORD, "interface", MONITOR_SESSION, t_interface },
98			{ KEYWORD, "protocol", MONITOR_SESSION, t_protocol },
99			{ KEYWORD, "realm", MONITOR_SESSION, t_realm },
100			{ KEYWORD, "username", MONITOR_SESSION, t_username },
101			{ ENDTOKEN, "", MONITOR_SESSION, NULL }
102			};
103
104			static const struct token t_filter[] = {
105			{ NOTOKEN, "", NONE, NULL },
106			{ KEYWORD, "ppp-id", NONE, t_ppp_id },
107			{ KEYWORD, "address", NONE, t_address },
108			{ KEYWORD, "interface", NONE, t_interface },
109			{ KEYWORD, "protocol", NONE, t_protocol },
110			{ KEYWORD, "realm", NONE, t_realm },
111			{ KEYWORD, "username", NONE, t_username },
112			{ ENDTOKEN, "", NONE, NULL }
113			};
114
115			static const struct token t_ppp_id[] = {
116			{ PPP_ID, "", NONE, t_filter },
117			{ ENDTOKEN, "", NONE, NULL }
118			};
119			static const struct token t_address[] = {
120			{ ADDRESS, "", NONE, t_filter },
121			{ ENDTOKEN, "", NONE, NULL }
122			};
123			static const struct token t_interface[] = {
124			{ INTERFACE, "", NONE, t_filter },
125			{ ENDTOKEN, "", NONE, NULL }
126			};
127			static const struct token t_protocol[] = {
128			{ PROTOCOL, "", NONE, t_filter },
129			{ ENDTOKEN, "", NONE, NULL }
130			};
131			static const struct token t_realm[] = {
132			{ REALM, "", NONE, t_filter },
133			{ ENDTOKEN, "", NONE, NULL }
134			};
135			static const struct token t_username[] = {
136			{ USERNAME, "", NONE, t_filter },
137			{ ENDTOKEN, "", NONE, NULL }
138			};
139
140			static const struct token match_token(char , const struct token []);
141			static void show_valid_args(const struct token []);
142
143			struct parse_result *
144			parse(int argc, char *argv[])
145			{
146			const struct token *table = t_main;
147			const struct token *match;
148
149			bzero(&res, sizeof(res));
150
151			while (argc >= 0) {
152			if ((match = match_token(argv[0], table)) == NULL) {
153			fprintf(stderr, "valid commands/args:\n");
154			show_valid_args(table);
155			return (NULL);
156			}
157
158			argc--;
159			argv++;
160
161			if (match->type == NOTOKEN \|\| match->next == NULL)
162			break;
163
164			table = match->next;
165			}
166
167			if (argc > 0) {
168			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
169			return (NULL);
170			}
171
172			return (&res);
173			}
174
175			static const struct token *
176			match_token(char *word, const struct token table[])
177			{
178			u_int i, match = 0;
179			unsigned long int ulval;
180			const struct token *t = NULL;
181			char *ep;
182
183			for (i = 0; table[i].type != ENDTOKEN; i++) {
184			switch (table[i].type) {
185			case NOTOKEN:
186			if (word == NULL \|\| strlen(word) == 0) {
187			match++;
188			t = &table[i];
189			}
190			break;
191			case KEYWORD:
192
193			if (word != NULL && strncmp(word, table[i].keyword,
194			strlen(word)) == 0) {
195			match++;
196			t = &table[i];
197			if (t->value)
198			res.action = t->value;
199			}
200			break;
201			case PPP_ID:
202			if (word == NULL)
203			break;
204			errno = 0;
205			ulval = strtoul(word, &ep, 10);
206			if (isdigit((unsigned char)word) && ep == '\0' &&
207			!(errno == ERANGE && ulval == ULONG_MAX)) {
208			res.ppp_id = ulval;
209			res.has_ppp_id = 1;
210			match++;
211			t = &table[i];
212			}
213			break;
214			case ADDRESS:
215			{
216			struct sockaddr_in sin4 = {
217			.sin_family = AF_INET,
218			.sin_len = sizeof(struct sockaddr_in)
219			};
220			struct sockaddr_in6 sin6 = {
221			.sin6_family = AF_INET6,
222			.sin6_len = sizeof(struct sockaddr_in6)
223			};
224			if (word == NULL)
225			break;
226			if (inet_pton(AF_INET, word, &sin4.sin_addr) == 1)
227			memcpy(&res.address, &sin4, sin4.sin_len);
228			else
229			if (inet_pton(AF_INET6, word, &sin6.sin6_addr) == 1)
230			memcpy(&res.address, &sin6, sin6.sin6_len);
231			else
232			break;
233			match++;
234			t = &table[i];
235			}
236			break;
237			case INTERFACE:
238			if (word == NULL)
239			break;
240			res.interface = word;
241			match++;
242			t = &table[i];
243			break;
244			case PROTOCOL:
245			if (word == NULL)
246			break;
247			if ((res.protocol = parse_protocol(word)) ==
248			PROTO_UNSPEC)
249			break;
250			match++;
251			t = &table[i];
252			break;
253			case REALM:
254			if (word == NULL)
255			break;
256			res.realm = word;
257			match++;
258			t = &table[i];
259			break;
260			case USERNAME:
261			if (word == NULL)
262			break;
263			res.username = word;
264			match++;
265			t = &table[i];
266			break;
267			case ENDTOKEN:
268			break;
269			}
270			}
271
272			if (match != 1) {
273			if (word == NULL)
274			fprintf(stderr, "missing argument:\n");
275			else if (match > 1)
276			fprintf(stderr, "ambiguous argument: %s\n", word);
277			else if (match < 1)
278			fprintf(stderr, "unknown argument: %s\n", word);
279			return (NULL);
280			}
281
282			return (t);
283			}
284
285			static void
286			show_valid_args(const struct token table[])
287			{
288			int i;
289
290			for (i = 0; table[i].type != ENDTOKEN; i++) {
291			switch (table[i].type) {
292			case NOTOKEN:
293			fprintf(stderr, " <cr>\n");
294			break;
295			case KEYWORD:
296			fprintf(stderr, " %s\n", table[i].keyword);
297			break;
298			case PPP_ID:
299			fprintf(stderr, " <ppp-id>\n");
300			break;
301			case ADDRESS:
302			fprintf(stderr, " <address>\n");
303			break;
304			case INTERFACE:
305			fprintf(stderr, " <interface>\n");
306			break;
307			case PROTOCOL:
308			fprintf(stderr, " [ pppoe \| l2tp \| pptp \| sstp ]\n");
309			break;
310			case REALM:
311			fprintf(stderr, " <realm>\n");
312			break;
313			case USERNAME:
314			fprintf(stderr, " <username>\n");
315			break;
316			case ENDTOKEN:
317			break;
318			}
319			}
320			}
321
322			enum protocol
323			parse_protocol(const char *str)
324			{
325			return
326			(strcasecmp(str, "PPTP" ) == 0)? PPTP :
327			(strcasecmp(str, "L2TP" ) == 0)? L2TP :
328			(strcasecmp(str, "PPPoE") == 0)? PPPOE :
329			(strcasecmp(str, "SSTP" ) == 0)? SSTP : PROTO_UNSPEC;
330			}
331