Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ospfctl/parser.c	Lines:	0	88	0.0 %
Date:	2017-11-07	Branches:	0	78	0.0 %


/*	$OpenBSD: parser.c,v 1.20 2011/05/09 12:25:35 claudio Exp $ */

/*
 * 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 "ospfd.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_db[];
static const struct token t_show_area[];
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},
	{ KEYWORD,	"reload",	FIB_RELOAD,	NULL},
	{ ENDTOKEN,	"",		NONE,		NULL}
};

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

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

static const struct token t_show_db[] = {
	{NOTOKEN,	"",			NONE,		NULL},
	{KEYWORD,	"area",			SHOW_DBBYAREA,	t_show_area},
	{KEYWORD,	"asbr",			SHOW_DBASBR,	NULL},
	{KEYWORD,	"external",		SHOW_DBEXT,	NULL},
	{KEYWORD,	"network",		SHOW_DBNET,	NULL},
	{KEYWORD,	"router",		SHOW_DBRTR,	NULL},
	{KEYWORD,	"self-originated",	SHOW_DBSELF,	NULL},
	{KEYWORD,	"summary",		SHOW_DBSUM,	NULL},
	{KEYWORD,	"opaque",		SHOW_DBOPAQ,	NULL},
	{ENDTOKEN,	"",			NONE,		NULL}
};

static const struct token t_show_area[] = {
	{ADDRESS,	"",		NONE,		NULL},
	{ENDTOKEN,	"",		NONE,		NULL}
};

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

static const struct token t_show_rib[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"detail",	SHOW_RIB_DTAIL,	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,		"ospf",		F_OSPFD_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 *);

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");
			break;
		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);
	}
	*prefixlen = 32;
	return (parse_addr(word, addr));
}

/* 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 1.20 2011/05/09 12:25:35 claudio Exp $ */
2
3			/*
4			* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
5			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
6			*
7			* Permission to use, copy, modify, and distribute this software for any
8			* purpose with or without fee is hereby granted, provided that the above
9			* copyright notice and this permission notice appear in all copies.
10			*
11			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18			*/
19
20			#include <sys/types.h>
21			#include <sys/socket.h>
22			#include <netinet/in.h>
23			#include <arpa/inet.h>
24			#include <err.h>
25			#include <errno.h>
26			#include <limits.h>
27			#include <stdio.h>
28			#include <stdlib.h>
29			#include <string.h>
30
31			#include "ospfd.h"
32
33			#include "parser.h"
34
35			enum token_type {
36			NOTOKEN,
37			ENDTOKEN,
38			KEYWORD,
39			ADDRESS,
40			FLAG,
41			PREFIX,
42			IFNAME
43			};
44
45			struct token {
46			enum token_type type;
47			const char *keyword;
48			int value;
49			const struct token *next;
50			};
51
52			static const struct token t_main[];
53			static const struct token t_fib[];
54			static const struct token t_show[];
55			static const struct token t_show_iface[];
56			static const struct token t_show_db[];
57			static const struct token t_show_area[];
58			static const struct token t_show_nbr[];
59			static const struct token t_show_rib[];
60			static const struct token t_show_fib[];
61			static const struct token t_log[];
62
63			static const struct token t_main[] = {
64			{KEYWORD, "reload", RELOAD, NULL},
65			{KEYWORD, "fib", FIB, t_fib},
66			{KEYWORD, "show", SHOW, t_show},
67			{KEYWORD, "log", NONE, t_log},
68			{ENDTOKEN, "", NONE, NULL}
69			};
70
71			static const struct token t_fib[] = {
72			{ KEYWORD, "couple", FIB_COUPLE, NULL},
73			{ KEYWORD, "decouple", FIB_DECOUPLE, NULL},
74			{ KEYWORD, "reload", FIB_RELOAD, NULL},
75			{ ENDTOKEN, "", NONE, NULL}
76			};
77
78			static const struct token t_show[] = {
79			{NOTOKEN, "", NONE, NULL},
80			{KEYWORD, "interfaces", SHOW_IFACE, t_show_iface},
81			{KEYWORD, "database", SHOW_DB, t_show_db},
82			{KEYWORD, "neighbor", SHOW_NBR, t_show_nbr},
83			{KEYWORD, "rib", SHOW_RIB, t_show_rib},
84			{KEYWORD, "fib", SHOW_FIB, t_show_fib},
85			{KEYWORD, "summary", SHOW_SUM, NULL},
86			{ENDTOKEN, "", NONE, NULL}
87			};
88
89			static const struct token t_show_iface[] = {
90			{NOTOKEN, "", NONE, NULL},
91			{KEYWORD, "detail", SHOW_IFACE_DTAIL, NULL},
92			{IFNAME, "", SHOW_IFACE_DTAIL, NULL},
93			{ENDTOKEN, "", NONE, NULL}
94			};
95
96			static const struct token t_show_db[] = {
97			{NOTOKEN, "", NONE, NULL},
98			{KEYWORD, "area", SHOW_DBBYAREA, t_show_area},
99			{KEYWORD, "asbr", SHOW_DBASBR, NULL},
100			{KEYWORD, "external", SHOW_DBEXT, NULL},
101			{KEYWORD, "network", SHOW_DBNET, NULL},
102			{KEYWORD, "router", SHOW_DBRTR, NULL},
103			{KEYWORD, "self-originated", SHOW_DBSELF, NULL},
104			{KEYWORD, "summary", SHOW_DBSUM, NULL},
105			{KEYWORD, "opaque", SHOW_DBOPAQ, NULL},
106			{ENDTOKEN, "", NONE, NULL}
107			};
108
109			static const struct token t_show_area[] = {
110			{ADDRESS, "", NONE, NULL},
111			{ENDTOKEN, "", NONE, NULL}
112			};
113
114			static const struct token t_show_nbr[] = {
115			{NOTOKEN, "", NONE, NULL},
116			{KEYWORD, "detail", SHOW_NBR_DTAIL, NULL},
117			{ENDTOKEN, "", NONE, NULL}
118			};
119
120			static const struct token t_show_rib[] = {
121			{NOTOKEN, "", NONE, NULL},
122			{KEYWORD, "detail", SHOW_RIB_DTAIL, NULL},
123			{ENDTOKEN, "", NONE, NULL}
124			};
125
126			static const struct token t_show_fib[] = {
127			{NOTOKEN, "", NONE, NULL},
128			{KEYWORD, "interface", SHOW_FIB_IFACE, t_show_iface},
129			{FLAG, "connected", F_CONNECTED, t_show_fib},
130			{FLAG, "static", F_STATIC, t_show_fib},
131			{FLAG, "ospf", F_OSPFD_INSERTED, t_show_fib},
132			{ADDRESS, "", NONE, NULL},
133			{ENDTOKEN, "", NONE, NULL}
134			};
135
136			static const struct token t_log[] = {
137			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
138			{KEYWORD, "brief", LOG_BRIEF, NULL},
139			{ENDTOKEN, "", NONE, NULL}
140			};
141
142			static const struct token match_token(const char , const struct token *,
143			struct parse_result *);
144			static void show_valid_args(const struct token *);
145
146			struct parse_result *
147			parse(int argc, char *argv[])
148			{
149			static struct parse_result res;
150			const struct token *table = t_main;
151			const struct token *match;
152
153			bzero(&res, sizeof(res));
154
155			while (argc >= 0) {
156			if ((match = match_token(argv[0], table, &res)) == NULL) {
157			fprintf(stderr, "valid commands/args:\n");
158			show_valid_args(table);
159			return (NULL);
160			}
161
162			argc--;
163			argv++;
164
165			if (match->type == NOTOKEN \|\| match->next == NULL)
166			break;
167
168			table = match->next;
169			}
170
171			if (argc > 0) {
172			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
173			return (NULL);
174			}
175
176			return (&res);
177			}
178
179			static const struct token *
180			match_token(const char word, const struct token table,
181			struct parse_result *res)
182			{
183			u_int i, match;
184			const struct token *t = NULL;
185
186			match = 0;
187
188			for (i = 0; table[i].type != ENDTOKEN; i++) {
189			switch (table[i].type) {
190			case NOTOKEN:
191			if (word == NULL \|\| strlen(word) == 0) {
192			match++;
193			t = &table[i];
194			}
195			break;
196			case KEYWORD:
197			if (word != NULL && strncmp(word, table[i].keyword,
198			strlen(word)) == 0) {
199			match++;
200			t = &table[i];
201			if (t->value)
202			res->action = t->value;
203			}
204			break;
205			case FLAG:
206			if (word != NULL && strncmp(word, table[i].keyword,
207			strlen(word)) == 0) {
208			match++;
209			t = &table[i];
210			res->flags \|= t->value;
211			}
212			break;
213			case ADDRESS:
214			if (parse_addr(word, &res->addr)) {
215			match++;
216			t = &table[i];
217			if (t->value)
218			res->action = t->value;
219			}
220			break;
221			case PREFIX:
222			if (parse_prefix(word, &res->addr, &res->prefixlen)) {
223			match++;
224			t = &table[i];
225			if (t->value)
226			res->action = t->value;
227			}
228			break;
229			case IFNAME:
230			if (!match && word != NULL && strlen(word) > 0) {
231			if (strlcpy(res->ifname, word,
232			sizeof(res->ifname)) >=
233			sizeof(res->ifname))
234			err(1, "interface name too long");
235			match++;
236			t = &table[i];
237			if (t->value)
238			res->action = t->value;
239			}
240			break;
241
242			case ENDTOKEN:
243			break;
244			}
245			}
246
247			if (match != 1) {
248			if (word == NULL)
249			fprintf(stderr, "missing argument:\n");
250			else if (match > 1)
251			fprintf(stderr, "ambiguous argument: %s\n", word);
252			else if (match < 1)
253			fprintf(stderr, "unknown argument: %s\n", word);
254			return (NULL);
255			}
256
257			return (t);
258			}
259
260			static void
261			show_valid_args(const struct token *table)
262			{
263			int i;
264
265			for (i = 0; table[i].type != ENDTOKEN; i++) {
266			switch (table[i].type) {
267			case NOTOKEN:
268			fprintf(stderr, " <cr>\n");
269			break;
270			case KEYWORD:
271			case FLAG:
272			fprintf(stderr, " %s\n", table[i].keyword);
273			break;
274			case ADDRESS:
275			fprintf(stderr, " <address>\n");
276			break;
277			case PREFIX:
278			fprintf(stderr, " <address>[/<len>]\n");
279			break;
280			case IFNAME:
281			fprintf(stderr, " <interface>\n");
282			break;
283			case ENDTOKEN:
284			break;
285			}
286			}
287			}
288
289			int
290			parse_addr(const char word, struct in_addr addr)
291			{
292			struct in_addr ina;
293
294			if (word == NULL)
295			return (0);
296
297			bzero(addr, sizeof(struct in_addr));
298			bzero(&ina, sizeof(ina));
299
300			if (inet_pton(AF_INET, word, &ina)) {
301			addr->s_addr = ina.s_addr;
302			return (1);
303			}
304
305			return (0);
306			}
307
308			int
309			parse_prefix(const char word, struct in_addr addr, u_int8_t *prefixlen)
310			{
311			struct in_addr ina;
312			int bits = 32;
313
314			if (word == NULL)
315			return (0);
316
317			bzero(addr, sizeof(struct in_addr));
318			bzero(&ina, sizeof(ina));
319
320			if (strrchr(word, '/') != NULL) {
321			if ((bits = inet_net_pton(AF_INET, word,
322			&ina, sizeof(ina))) == -1)
323			return (0);
324			addr->s_addr = ina.s_addr & htonl(prefixlen2mask(bits));
325			*prefixlen = bits;
326			return (1);
327			}
328			*prefixlen = 32;
329			return (parse_addr(word, addr));
330			}
331
332			/* XXX local copy from kroute.c, should go to shared file */
333			in_addr_t
334			prefixlen2mask(u_int8_t prefixlen)
335			{
336			if (prefixlen == 0)
337			return (0);
338
339			return (0xffffffff << (32 - prefixlen));
340			}