Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/dvmrpctl/parser.c	Lines:	0	84	0.0 %
Date:	2017-11-07	Branches:	0	76	0.0 %


/*	$OpenBSD: parser.c,v 1.6 2017/07/28 13:03:23 florian Exp $ */

/*
 * Copyright (c) 2004, 2005, 2006 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 "dvmrpd.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_show[];
static const struct token t_show_iface[];
static const struct token t_show_nbr[];
static const struct token t_show_mfc[];
static const struct token t_show_rib[];
static const struct token t_log[];

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

static const struct token t_show[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"igmp",		SHOW_IGMP,	NULL},
	{KEYWORD,	"interfaces",	SHOW_IFACE,	t_show_iface},
	{KEYWORD,	"mfc",		SHOW_MFC,	t_show_mfc},
	{KEYWORD,	"neighbor",	SHOW_NBR,	t_show_nbr},
	{KEYWORD,	"rib",		SHOW_RIB,	t_show_rib},
	{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_mfc[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"detail",	SHOW_MFC_DTAIL,	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_log[] = {
	{KEYWORD,	"verbose",	LOG_VERBOSE,	NULL},
	{KEYWORD,	"brief",	LOG_BRIEF,	NULL},
	{ENDTOKEN,	"",		NONE,		NULL}
};


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

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(0xffffffff << (32 - bits));
		*prefixlen = bits;
		return (1);
	} else {
		*prefixlen = 32;
		return (parse_addr(word, addr));
	}

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.6 2017/07/28 13:03:23 florian Exp $ */
2
3			/*
4			* Copyright (c) 2004, 2005, 2006 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 "dvmrpd.h"
32			#include "parser.h"
33
34			enum token_type {
35			NOTOKEN,
36			ENDTOKEN,
37			KEYWORD,
38			ADDRESS,
39			FLAG,
40			PREFIX,
41			IFNAME
42			};
43
44			struct token {
45			enum token_type type;
46			const char *keyword;
47			int value;
48			const struct token *next;
49			};
50
51			static const struct token t_main[];
52			static const struct token t_show[];
53			static const struct token t_show_iface[];
54			static const struct token t_show_nbr[];
55			static const struct token t_show_mfc[];
56			static const struct token t_show_rib[];
57			static const struct token t_log[];
58
59			static const struct token t_main[] = {
60			/* {KEYWORD, "reload", RELOAD, NULL}, */
61			{KEYWORD, "show", SHOW, t_show},
62			{KEYWORD, "log", NONE, t_log},
63			{ENDTOKEN, "", NONE, NULL}
64			};
65
66			static const struct token t_show[] = {
67			{NOTOKEN, "", NONE, NULL},
68			{KEYWORD, "igmp", SHOW_IGMP, NULL},
69			{KEYWORD, "interfaces", SHOW_IFACE, t_show_iface},
70			{KEYWORD, "mfc", SHOW_MFC, t_show_mfc},
71			{KEYWORD, "neighbor", SHOW_NBR, t_show_nbr},
72			{KEYWORD, "rib", SHOW_RIB, t_show_rib},
73			{KEYWORD, "summary", SHOW_SUM, NULL},
74			{ENDTOKEN, "", NONE, NULL}
75			};
76
77			static const struct token t_show_iface[] = {
78			{NOTOKEN, "", NONE, NULL},
79			{KEYWORD, "detail", SHOW_IFACE_DTAIL,NULL},
80			{IFNAME, "", SHOW_IFACE_DTAIL,NULL},
81			{ENDTOKEN, "", NONE, NULL}
82			};
83
84			static const struct token t_show_mfc[] = {
85			{NOTOKEN, "", NONE, NULL},
86			{KEYWORD, "detail", SHOW_MFC_DTAIL, NULL},
87			{ENDTOKEN, "", NONE, NULL}
88			};
89
90			static const struct token t_show_nbr[] = {
91			{NOTOKEN, "", NONE, NULL},
92			{KEYWORD, "detail", SHOW_NBR_DTAIL, NULL},
93			{ENDTOKEN, "", NONE, NULL}
94			};
95
96			static const struct token t_show_rib[] = {
97			{NOTOKEN, "", NONE, NULL},
98			{KEYWORD, "detail", SHOW_RIB_DTAIL, NULL},
99			{ENDTOKEN, "", NONE, NULL}
100			};
101
102			static const struct token t_log[] = {
103			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
104			{KEYWORD, "brief", LOG_BRIEF, NULL},
105			{ENDTOKEN, "", NONE, NULL}
106			};
107
108
109			static void show_valid_args(const struct token *);
110			static const struct token match_token(const char , const struct token *,
111			struct parse_result *);
112
113			struct parse_result *
114			parse(int argc, char *argv[])
115			{
116			static struct parse_result res;
117			const struct token *table = t_main;
118			const struct token *match;
119
120			bzero(&res, sizeof(res));
121
122			while (argc >= 0) {
123			if ((match = match_token(argv[0], table, &res)) == NULL) {
124			fprintf(stderr, "valid commands/args:\n");
125			show_valid_args(table);
126			return (NULL);
127			}
128
129			argc--;
130			argv++;
131
132			if (match->type == NOTOKEN \|\| match->next == NULL)
133			break;
134
135			table = match->next;
136			}
137
138			if (argc > 0) {
139			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
140			return (NULL);
141			}
142
143			return (&res);
144			}
145
146			static const struct token *
147			match_token(const char word, const struct token table,
148			struct parse_result *res)
149			{
150			u_int i, match;
151			const struct token *t = NULL;
152
153			match = 0;
154
155			for (i = 0; table[i].type != ENDTOKEN; i++) {
156			switch (table[i].type) {
157			case NOTOKEN:
158			if (word == NULL \|\| strlen(word) == 0) {
159			match++;
160			t = &table[i];
161			}
162			break;
163			case KEYWORD:
164			if (word != NULL && strncmp(word, table[i].keyword,
165			strlen(word)) == 0) {
166			match++;
167			t = &table[i];
168			if (t->value)
169			res->action = t->value;
170			}
171			break;
172			case FLAG:
173			if (word != NULL && strncmp(word, table[i].keyword,
174			strlen(word)) == 0) {
175			match++;
176			t = &table[i];
177			res->flags \|= t->value;
178			}
179			break;
180			case ADDRESS:
181			if (parse_addr(word, &res->addr)) {
182			match++;
183			t = &table[i];
184			if (t->value)
185			res->action = t->value;
186			}
187			break;
188			case PREFIX:
189			if (parse_prefix(word, &res->addr, &res->prefixlen)) {
190			match++;
191			t = &table[i];
192			if (t->value)
193			res->action = t->value;
194			}
195			break;
196			case IFNAME:
197			if (!match && word != NULL && strlen(word) > 0) {
198			if (strlcpy(res->ifname, word,
199			sizeof(res->ifname)) >=
200			sizeof(res->ifname))
201			err(1, "interface name too long");
202			match++;
203			t = &table[i];
204			if (t->value)
205			res->action = t->value;
206			}
207			break;
208
209			case ENDTOKEN:
210			break;
211			}
212			}
213
214			if (match != 1) {
215			if (word == NULL)
216			fprintf(stderr, "missing argument:\n");
217			else if (match > 1)
218			fprintf(stderr, "ambiguous argument: %s\n", word);
219			else if (match < 1)
220			fprintf(stderr, "unknown argument: %s\n", word);
221			return (NULL);
222			}
223
224			return (t);
225			}
226
227			static void
228			show_valid_args(const struct token *table)
229			{
230			int i;
231
232			for (i = 0; table[i].type != ENDTOKEN; i++) {
233			switch (table[i].type) {
234			case NOTOKEN:
235			fprintf(stderr, " <cr>\n");
236			break;
237			case KEYWORD:
238			case FLAG:
239			fprintf(stderr, " %s\n", table[i].keyword);
240			break;
241			case ADDRESS:
242			fprintf(stderr, " <address>\n");
243			break;
244			case PREFIX:
245			fprintf(stderr, " <address>[/<len>]\n");
246			break;
247			case IFNAME:
248			fprintf(stderr, " <interface>\n");
249			case ENDTOKEN:
250			break;
251			}
252			}
253			}
254
255			int
256			parse_addr(const char word, struct in_addr addr)
257			{
258			struct in_addr ina;
259
260			if (word == NULL)
261			return (0);
262
263			bzero(addr, sizeof(struct in_addr));
264			bzero(&ina, sizeof(ina));
265
266			if (inet_pton(AF_INET, word, &ina)) {
267			addr->s_addr = ina.s_addr;
268			return (1);
269			}
270
271			return (0);
272			}
273
274			int
275			parse_prefix(const char word, struct in_addr addr, u_int8_t *prefixlen)
276			{
277			struct in_addr ina;
278			int bits = 32;
279
280			if (word == NULL)
281			return (0);
282
283			bzero(addr, sizeof(struct in_addr));
284			bzero(&ina, sizeof(ina));
285
286			if (strrchr(word, '/') != NULL) {
287			if ((bits = inet_net_pton(AF_INET, word,
288			&ina, sizeof(ina))) == -1)
289			return (0);
290			addr->s_addr = ina.s_addr & htonl(0xffffffff << (32 - bits));
291			*prefixlen = bits;
292			return (1);
293			} else {
294			*prefixlen = 32;
295			return (parse_addr(word, addr));
296			}
297
298			return (0);
299			}