Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ripctl/parser.c	Lines:	0	87	0.0 %
Date:	2017-11-07	Branches:	0	78	0.0 %


/*	$OpenBSD: parser.c,v 1.7 2017/07/28 13:02:35 florian Exp $ */

/*
 * Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
 * 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/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "ripd.h"

#include "parser.h"

enum token_type {
	NOTOKEN,
	ENDTOKEN,
	KEYWORD,
	ADDRESS,
	FLAG,
	PREFIX,
	IFNAME
};

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

static const struct token t_main[];
static const struct token t_fib[];
static const struct token t_show[];
static const struct token t_show_iface[];
static const struct token t_show_nbr[];
static const struct token t_show_rib[];
static const struct token t_show_fib[];
static const struct token t_log[];

static const struct token t_main[] = {
/*	{KEYWORD,	"reload",	RELOAD,		NULL}, */
	{KEYWORD,	"fib",		FIB,		t_fib},
	{KEYWORD,	"show",		SHOW,		t_show},
	{KEYWORD,	"log",		NONE,		t_log},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_fib[] = {
	{ KEYWORD,	"couple",	FIB_COUPLE,	NULL},
	{ KEYWORD,	"decouple",	FIB_DECOUPLE,	NULL},
	{ ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"interfaces",	SHOW_IFACE,	t_show_iface},
	{KEYWORD,	"neighbor",	SHOW_NBR,	t_show_nbr},
	{KEYWORD,	"rib",		SHOW_RIB,	t_show_rib},
	{KEYWORD,	"fib",		SHOW_FIB,	t_show_fib},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_iface[] = {
	{NOTOKEN,	"",		NONE,			NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_show_nbr[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_rib[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_fib[] = {
	{NOTOKEN,	"",		NONE,			NULL},
	{KEYWORD,	"interface",	SHOW_FIB_IFACE,		t_show_iface},
	{FLAG,		"connected",	F_CONNECTED,		t_show_fib},
	{FLAG,		"static",	F_STATIC,		t_show_fib},
	{FLAG,		"rip",		F_RIPD_INSERTED,	t_show_fib},
	{ADDRESS,	"",		NONE,			NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_log[] = {
	{KEYWORD,	"verbose",	LOG_VERBOSE,		NULL},
	{KEYWORD,	"brief",	LOG_BRIEF,		NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token *match_token(const char *, const struct token *,
    struct parse_result *);
static void show_valid_args(const struct token *table);

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

	bzero(&res, sizeof(res));

	while (argc >= 0) {
		if ((match = match_token(argv[0], table, &res)) == 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(const char *word, const struct token *table,
    struct parse_result *res)
{
	u_int			 i, match;
	const struct token	*t = NULL;

	match = 0;

	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 FLAG:
			if (word != NULL && strncmp(word, table[i].keyword,
			    strlen(word)) == 0) {
				match++;
				t = &table[i];
				res->flags |= t->value;
			}
			break;
		case ADDRESS:
			if (parse_addr(word, &res->addr)) {
				match++;
				t = &table[i];
				if (t->value)
					res->action = t->value;
			}
			break;
		case PREFIX:
			if (parse_prefix(word, &res->addr, &res->prefixlen)) {
				match++;
				t = &table[i];
				if (t->value)
					res->action = t->value;
			}
			break;
		case IFNAME:
			if (!match && word != NULL && strlen(word) > 0) {
				if (strlcpy(res->ifname, word,
				    sizeof(res->ifname)) >=
				    sizeof(res->ifname))
					err(1, "interface name too long");
				match++;
				t = &table[i];
				if (t->value)
					res->action = t->value;
			}
			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:
		case FLAG:
			fprintf(stderr, "  %s\n", table[i].keyword);
			break;
		case ADDRESS:
			fprintf(stderr, "  <address>\n");
			break;
		case PREFIX:
			fprintf(stderr, "  <address>[/<len>]\n");
			break;
		case IFNAME:
			fprintf(stderr, "  <interface>\n");
		case ENDTOKEN:
			break;
		}
	}
}

int
parse_addr(const char *word, struct in_addr *addr)
{
	struct in_addr	ina;

	if (word == NULL)
		return (0);

	bzero(addr, sizeof(struct in_addr));
	bzero(&ina, sizeof(ina));

	if (inet_pton(AF_INET, word, &ina)) {
		addr->s_addr = ina.s_addr;
		return (1);
	}

	return (0);
}

int
parse_prefix(const char *word, struct in_addr *addr, u_int8_t *prefixlen)
{
	struct in_addr	 ina;
	int		 bits = 32;

	if (word == NULL)
		return (0);

	bzero(addr, sizeof(struct in_addr));
	bzero(&ina, sizeof(ina));

	if (strrchr(word, '/') != NULL) {
		if ((bits = inet_net_pton(AF_INET, word,
		    &ina, sizeof(ina))) == -1)
			return (0);
		addr->s_addr = ina.s_addr & htonl(prefixlen2mask(bits));
		*prefixlen = bits;
		return (1);
	} else {
		*prefixlen = 32;
		return (parse_addr(word, addr));
	}

	return (0);
}

/* XXX local copy from kroute.c, should go to shared file */
in_addr_t
prefixlen2mask(u_int8_t prefixlen)
{
	if (prefixlen == 0)
		return (0);

	return (0xffffffff << (32 - prefixlen));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.7 2017/07/28 13:02:35 florian Exp $ */
2
3			/*
4			* Copyright (c) 2006 Michele Marchetto <mydecay@openbeer.it>
5			* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
6			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
7			*
8			* Permission to use, copy, modify, and distribute this software for any
9			* purpose with or without fee is hereby granted, provided that the above
10			* copyright notice and this permission notice appear in all copies.
11			*
12			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19			*/
20
21			#include <sys/types.h>
22			#include <sys/socket.h>
23			#include <netinet/in.h>
24			#include <arpa/inet.h>
25			#include <err.h>
26			#include <errno.h>
27			#include <limits.h>
28			#include <stdio.h>
29			#include <stdlib.h>
30			#include <string.h>
31
32			#include "ripd.h"
33
34			#include "parser.h"
35
36			enum token_type {
37			NOTOKEN,
38			ENDTOKEN,
39			KEYWORD,
40			ADDRESS,
41			FLAG,
42			PREFIX,
43			IFNAME
44			};
45
46			struct token {
47			enum token_type type;
48			const char *keyword;
49			int value;
50			const struct token *next;
51			};
52
53			static const struct token t_main[];
54			static const struct token t_fib[];
55			static const struct token t_show[];
56			static const struct token t_show_iface[];
57			static const struct token t_show_nbr[];
58			static const struct token t_show_rib[];
59			static const struct token t_show_fib[];
60			static const struct token t_log[];
61
62			static const struct token t_main[] = {
63			/* {KEYWORD, "reload", RELOAD, NULL}, */
64			{KEYWORD, "fib", FIB, t_fib},
65			{KEYWORD, "show", SHOW, t_show},
66			{KEYWORD, "log", NONE, t_log},
67			{ENDTOKEN, "", NONE, NULL}
68			};
69
70			static const struct token t_fib[] = {
71			{ KEYWORD, "couple", FIB_COUPLE, NULL},
72			{ KEYWORD, "decouple", FIB_DECOUPLE, NULL},
73			{ ENDTOKEN, "", NONE, NULL}
74			};
75
76			static const struct token t_show[] = {
77			{NOTOKEN, "", NONE, NULL},
78			{KEYWORD, "interfaces", SHOW_IFACE, t_show_iface},
79			{KEYWORD, "neighbor", SHOW_NBR, t_show_nbr},
80			{KEYWORD, "rib", SHOW_RIB, t_show_rib},
81			{KEYWORD, "fib", SHOW_FIB, t_show_fib},
82			{ENDTOKEN, "", NONE, NULL}
83			};
84
85			static const struct token t_show_iface[] = {
86			{NOTOKEN, "", NONE, NULL},
87			{ENDTOKEN, "", NONE, NULL}
88			};
89
90			static const struct token t_show_nbr[] = {
91			{NOTOKEN, "", NONE, NULL},
92			{ENDTOKEN, "", NONE, NULL}
93			};
94
95			static const struct token t_show_rib[] = {
96			{NOTOKEN, "", NONE, NULL},
97			{ENDTOKEN, "", NONE, NULL}
98			};
99
100			static const struct token t_show_fib[] = {
101			{NOTOKEN, "", NONE, NULL},
102			{KEYWORD, "interface", SHOW_FIB_IFACE, t_show_iface},
103			{FLAG, "connected", F_CONNECTED, t_show_fib},
104			{FLAG, "static", F_STATIC, t_show_fib},
105			{FLAG, "rip", F_RIPD_INSERTED, t_show_fib},
106			{ADDRESS, "", NONE, NULL},
107			{ENDTOKEN, "", NONE, NULL}
108			};
109
110			static const struct token t_log[] = {
111			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
112			{KEYWORD, "brief", LOG_BRIEF, NULL},
113			{ENDTOKEN, "", NONE, NULL}
114			};
115
116			static const struct token match_token(const char , const struct token *,
117			struct parse_result *);
118			static void show_valid_args(const struct token *table);
119
120			struct parse_result *
121			parse(int argc, char *argv[])
122			{
123			static struct parse_result res;
124			const struct token *table = t_main;
125			const struct token *match;
126
127			bzero(&res, sizeof(res));
128
129			while (argc >= 0) {
130			if ((match = match_token(argv[0], table, &res)) == NULL) {
131			fprintf(stderr, "valid commands/args:\n");
132			show_valid_args(table);
133			return (NULL);
134			}
135
136			argc--;
137			argv++;
138
139			if (match->type == NOTOKEN \|\| match->next == NULL)
140			break;
141
142			table = match->next;
143			}
144
145			if (argc > 0) {
146			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
147			return (NULL);
148			}
149
150			return (&res);
151			}
152
153			static const struct token *
154			match_token(const char word, const struct token table,
155			struct parse_result *res)
156			{
157			u_int i, match;
158			const struct token *t = NULL;
159
160			match = 0;
161
162			for (i = 0; table[i].type != ENDTOKEN; i++) {
163			switch (table[i].type) {
164			case NOTOKEN:
165			if (word == NULL \|\| strlen(word) == 0) {
166			match++;
167			t = &table[i];
168			}
169			break;
170			case KEYWORD:
171			if (word != NULL && strncmp(word, table[i].keyword,
172			strlen(word)) == 0) {
173			match++;
174			t = &table[i];
175			if (t->value)
176			res->action = t->value;
177			}
178			break;
179			case FLAG:
180			if (word != NULL && strncmp(word, table[i].keyword,
181			strlen(word)) == 0) {
182			match++;
183			t = &table[i];
184			res->flags \|= t->value;
185			}
186			break;
187			case ADDRESS:
188			if (parse_addr(word, &res->addr)) {
189			match++;
190			t = &table[i];
191			if (t->value)
192			res->action = t->value;
193			}
194			break;
195			case PREFIX:
196			if (parse_prefix(word, &res->addr, &res->prefixlen)) {
197			match++;
198			t = &table[i];
199			if (t->value)
200			res->action = t->value;
201			}
202			break;
203			case IFNAME:
204			if (!match && word != NULL && strlen(word) > 0) {
205			if (strlcpy(res->ifname, word,
206			sizeof(res->ifname)) >=
207			sizeof(res->ifname))
208			err(1, "interface name too long");
209			match++;
210			t = &table[i];
211			if (t->value)
212			res->action = t->value;
213			}
214			break;
215
216			case ENDTOKEN:
217			break;
218			}
219			}
220
221			if (match != 1) {
222			if (word == NULL)
223			fprintf(stderr, "missing argument:\n");
224			else if (match > 1)
225			fprintf(stderr, "ambiguous argument: %s\n", word);
226			else if (match < 1)
227			fprintf(stderr, "unknown argument: %s\n", word);
228			return (NULL);
229			}
230
231			return (t);
232			}
233
234			static void
235			show_valid_args(const struct token *table)
236			{
237			int i;
238
239			for (i = 0; table[i].type != ENDTOKEN; i++) {
240			switch (table[i].type) {
241			case NOTOKEN:
242			fprintf(stderr, " <cr>\n");
243			break;
244			case KEYWORD:
245			case FLAG:
246			fprintf(stderr, " %s\n", table[i].keyword);
247			break;
248			case ADDRESS:
249			fprintf(stderr, " <address>\n");
250			break;
251			case PREFIX:
252			fprintf(stderr, " <address>[/<len>]\n");
253			break;
254			case IFNAME:
255			fprintf(stderr, " <interface>\n");
256			case ENDTOKEN:
257			break;
258			}
259			}
260			}
261
262			int
263			parse_addr(const char word, struct in_addr addr)
264			{
265			struct in_addr ina;
266
267			if (word == NULL)
268			return (0);
269
270			bzero(addr, sizeof(struct in_addr));
271			bzero(&ina, sizeof(ina));
272
273			if (inet_pton(AF_INET, word, &ina)) {
274			addr->s_addr = ina.s_addr;
275			return (1);
276			}
277
278			return (0);
279			}
280
281			int
282			parse_prefix(const char word, struct in_addr addr, u_int8_t *prefixlen)
283			{
284			struct in_addr ina;
285			int bits = 32;
286
287			if (word == NULL)
288			return (0);
289
290			bzero(addr, sizeof(struct in_addr));
291			bzero(&ina, sizeof(ina));
292
293			if (strrchr(word, '/') != NULL) {
294			if ((bits = inet_net_pton(AF_INET, word,
295			&ina, sizeof(ina))) == -1)
296			return (0);
297			addr->s_addr = ina.s_addr & htonl(prefixlen2mask(bits));
298			*prefixlen = bits;
299			return (1);
300			} else {
301			*prefixlen = 32;
302			return (parse_addr(word, addr));
303			}
304
305			return (0);
306			}
307
308			/* XXX local copy from kroute.c, should go to shared file */
309			in_addr_t
310			prefixlen2mask(u_int8_t prefixlen)
311			{
312			if (prefixlen == 0)
313			return (0);
314
315			return (0xffffffff << (32 - prefixlen));
316			}