Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ldpctl/parser.c	Lines:	0	87	0.0 %
Date:	2017-11-13	Branches:	0	78	0.0 %


/*	$OpenBSD: parser.c,v 1.12 2016/05/23 19:06:03 renato Exp $ */

/*
 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
 * 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 <netdb.h>

#include "ldpd.h"

#include "parser.h"

enum token_type {
	NOTOKEN,
	ENDTOKEN,
	KEYWORD,
	FAMILY,
	ADDRESS,
	FLAG,
	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_iface_af[];
static const struct token t_show_disc[];
static const struct token t_show_disc_af[];
static const struct token t_show_nbr[];
static const struct token t_show_nbr_af[];
static const struct token t_show_lib[];
static const struct token t_show_lib_af[];
static const struct token t_show_fib[];
static const struct token t_show_fib_af[];
static const struct token t_show_l2vpn[];
static const struct token t_clear[];
static const struct token t_clear_nbr[];
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,	"clear",	CLEAR_NBR,	t_clear},
	{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,	"discovery",	SHOW_DISC,	t_show_disc},
	{KEYWORD,	"neighbor",	SHOW_NBR,	t_show_nbr},
	{KEYWORD,	"lib",		SHOW_LIB,	t_show_lib},
	{KEYWORD,	"fib",		SHOW_FIB,	t_show_fib},
	{KEYWORD,	"l2vpn",	NONE,		t_show_l2vpn},
	{ENDTOKEN,	"",		NONE,		NULL}
};

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

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

static const struct token t_show_disc[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"family",	NONE,		t_show_disc_af},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_disc_af[] = {
	{FAMILY,	"",		NONE,		t_show_disc},
	{ENDTOKEN,	"",		NONE,		NULL}
};

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

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

static const struct token t_show_lib[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"family",	NONE,		t_show_lib_af},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_lib_af[] = {
	{FAMILY,	"",		NONE,		t_show_lib},
	{ENDTOKEN,	"",		NONE,		NULL}
};

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

static const struct token t_show_fib_af[] = {
	{FAMILY,	"",		NONE,		t_show_fib},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show_l2vpn[] = {
	{KEYWORD,	"bindings",	SHOW_L2VPN_BINDING,	NULL},
	{KEYWORD,	"pseudowires",	SHOW_L2VPN_PW,		NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_clear[] = {
	{KEYWORD,	"neighbors",	CLEAR_NBR,	t_clear_nbr},
	{ENDTOKEN,	"",		NONE,		NULL}
};

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

	memset(&res, 0, 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)
{
	uint			 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 FAMILY:
			if (word == NULL)
				break;
			if (!strcmp(word, "inet") ||
			    !strcasecmp(word, "IPv4")) {
				match++;
				t = &table[i];
				res->family = AF_INET;
			}
			if (!strcmp(word, "inet6") ||
			    !strcasecmp(word, "IPv6")) {
				match++;
				t = &table[i];
				res->family = AF_INET6;
			}
			break;
		case ADDRESS:
			if (parse_addr(word, &res->family, &res->addr)) {
				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 FAMILY:
			fprintf(stderr, "  [ inet | inet6 | IPv4 | IPv6 ]\n");
			break;
		case ADDRESS:
			fprintf(stderr, "  <address>\n");
			break;
		case IFNAME:
			fprintf(stderr, "  <interface>\n");
		case ENDTOKEN:
			break;
		}
	}
}

int
parse_addr(const char *word, int *family, union ldpd_addr *addr)
{
	struct in_addr		 ina;
	struct addrinfo		 hints, *r;
	struct sockaddr_in6	*sa_in6;

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

	memset(addr, 0, sizeof(*addr));
	memset(&ina, 0, sizeof(ina));

	if (inet_net_pton(AF_INET, word, &ina, sizeof(ina)) != -1) {
		*family = AF_INET;
		addr->v4.s_addr = ina.s_addr;
		return (1);
	}

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_INET6;
	hints.ai_socktype = SOCK_DGRAM; /*dummy*/
	hints.ai_flags = AI_NUMERICHOST;
	if (getaddrinfo(word, "0", &hints, &r) == 0) {
		sa_in6 = (struct sockaddr_in6 *)r->ai_addr;
		*family = AF_INET6;
		addr->v6 = sa_in6->sin6_addr;
		freeaddrinfo(r);
		return (1);
	}

	return (0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.12 2016/05/23 19:06:03 renato Exp $ */
2
3			/*
4			* Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
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			#include <netdb.h>
32
33			#include "ldpd.h"
34
35			#include "parser.h"
36
37			enum token_type {
38			NOTOKEN,
39			ENDTOKEN,
40			KEYWORD,
41			FAMILY,
42			ADDRESS,
43			FLAG,
44			IFNAME
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 const struct token t_main[];
55			static const struct token t_fib[];
56			static const struct token t_show[];
57			static const struct token t_show_iface[];
58			static const struct token t_show_iface_af[];
59			static const struct token t_show_disc[];
60			static const struct token t_show_disc_af[];
61			static const struct token t_show_nbr[];
62			static const struct token t_show_nbr_af[];
63			static const struct token t_show_lib[];
64			static const struct token t_show_lib_af[];
65			static const struct token t_show_fib[];
66			static const struct token t_show_fib_af[];
67			static const struct token t_show_l2vpn[];
68			static const struct token t_clear[];
69			static const struct token t_clear_nbr[];
70			static const struct token t_log[];
71
72			static const struct token t_main[] = {
73			{KEYWORD, "reload", RELOAD, NULL},
74			{KEYWORD, "fib", FIB, t_fib},
75			{KEYWORD, "show", SHOW, t_show},
76			{KEYWORD, "clear", CLEAR_NBR, t_clear},
77			{KEYWORD, "log", NONE, t_log},
78			{ENDTOKEN, "", NONE, NULL}
79			};
80
81			static const struct token t_fib[] = {
82			{ KEYWORD, "couple", FIB_COUPLE, NULL},
83			{ KEYWORD, "decouple", FIB_DECOUPLE, NULL},
84			{ ENDTOKEN, "", NONE, NULL}
85			};
86
87			static const struct token t_show[] = {
88			{NOTOKEN, "", NONE, NULL},
89			{KEYWORD, "interfaces", SHOW_IFACE, t_show_iface},
90			{KEYWORD, "discovery", SHOW_DISC, t_show_disc},
91			{KEYWORD, "neighbor", SHOW_NBR, t_show_nbr},
92			{KEYWORD, "lib", SHOW_LIB, t_show_lib},
93			{KEYWORD, "fib", SHOW_FIB, t_show_fib},
94			{KEYWORD, "l2vpn", NONE, t_show_l2vpn},
95			{ENDTOKEN, "", NONE, NULL}
96			};
97
98			static const struct token t_show_iface[] = {
99			{NOTOKEN, "", NONE, NULL},
100			{KEYWORD, "family", NONE, t_show_iface_af},
101			{ENDTOKEN, "", NONE, NULL}
102			};
103
104			static const struct token t_show_iface_af[] = {
105			{FAMILY, "", NONE, t_show_iface},
106			{ENDTOKEN, "", NONE, NULL}
107			};
108
109			static const struct token t_show_disc[] = {
110			{NOTOKEN, "", NONE, NULL},
111			{KEYWORD, "family", NONE, t_show_disc_af},
112			{ENDTOKEN, "", NONE, NULL}
113			};
114
115			static const struct token t_show_disc_af[] = {
116			{FAMILY, "", NONE, t_show_disc},
117			{ENDTOKEN, "", NONE, NULL}
118			};
119
120			static const struct token t_show_nbr[] = {
121			{NOTOKEN, "", NONE, NULL},
122			{KEYWORD, "family", NONE, t_show_nbr_af},
123			{ENDTOKEN, "", NONE, NULL}
124			};
125
126			static const struct token t_show_nbr_af[] = {
127			{FAMILY, "", NONE, t_show_nbr},
128			{ENDTOKEN, "", NONE, NULL}
129			};
130
131			static const struct token t_show_lib[] = {
132			{NOTOKEN, "", NONE, NULL},
133			{KEYWORD, "family", NONE, t_show_lib_af},
134			{ENDTOKEN, "", NONE, NULL}
135			};
136
137			static const struct token t_show_lib_af[] = {
138			{FAMILY, "", NONE, t_show_lib},
139			{ENDTOKEN, "", NONE, NULL}
140			};
141
142			static const struct token t_show_fib[] = {
143			{NOTOKEN, "", NONE, NULL},
144			{KEYWORD, "family", NONE, t_show_fib_af},
145			{KEYWORD, "interface", SHOW_FIB_IFACE, t_show_iface},
146			{FLAG, "connected", F_CONNECTED, t_show_fib},
147			{FLAG, "static", F_STATIC, t_show_fib},
148			{ADDRESS, "", NONE, NULL},
149			{ENDTOKEN, "", NONE, NULL}
150			};
151
152			static const struct token t_show_fib_af[] = {
153			{FAMILY, "", NONE, t_show_fib},
154			{ENDTOKEN, "", NONE, NULL}
155			};
156
157			static const struct token t_show_l2vpn[] = {
158			{KEYWORD, "bindings", SHOW_L2VPN_BINDING, NULL},
159			{KEYWORD, "pseudowires", SHOW_L2VPN_PW, NULL},
160			{ENDTOKEN, "", NONE, NULL}
161			};
162
163			static const struct token t_clear[] = {
164			{KEYWORD, "neighbors", CLEAR_NBR, t_clear_nbr},
165			{ENDTOKEN, "", NONE, NULL}
166			};
167
168			static const struct token t_clear_nbr[] = {
169			{NOTOKEN, "", NONE, NULL},
170			{ADDRESS, "", NONE, NULL},
171			{ENDTOKEN, "", NONE, NULL}
172			};
173
174			static const struct token t_log[] = {
175			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
176			{KEYWORD, "brief", LOG_BRIEF, NULL},
177			{ENDTOKEN, "", NONE, NULL}
178			};
179
180			static const struct token match_token(const char , const struct token *,
181			struct parse_result *);
182			static void show_valid_args(const struct token *);
183
184			struct parse_result *
185			parse(int argc, char *argv[])
186			{
187			static struct parse_result res;
188			const struct token *table = t_main;
189			const struct token *match;
190
191			memset(&res, 0, sizeof(res));
192
193			while (argc >= 0) {
194			if ((match = match_token(argv[0], table, &res)) == NULL) {
195			fprintf(stderr, "valid commands/args:\n");
196			show_valid_args(table);
197			return (NULL);
198			}
199
200			argc--;
201			argv++;
202
203			if (match->type == NOTOKEN \|\| match->next == NULL)
204			break;
205
206			table = match->next;
207			}
208
209			if (argc > 0) {
210			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
211			return (NULL);
212			}
213
214			return (&res);
215			}
216
217			static const struct token *
218			match_token(const char word, const struct token table,
219			struct parse_result *res)
220			{
221			uint i, match;
222			const struct token *t = NULL;
223
224			match = 0;
225
226			for (i = 0; table[i].type != ENDTOKEN; i++) {
227			switch (table[i].type) {
228			case NOTOKEN:
229			if (word == NULL \|\| strlen(word) == 0) {
230			match++;
231			t = &table[i];
232			}
233			break;
234			case KEYWORD:
235			if (word != NULL && strncmp(word, table[i].keyword,
236			strlen(word)) == 0) {
237			match++;
238			t = &table[i];
239			if (t->value)
240			res->action = t->value;
241			}
242			break;
243			case FLAG:
244			if (word != NULL && strncmp(word, table[i].keyword,
245			strlen(word)) == 0) {
246			match++;
247			t = &table[i];
248			res->flags \|= t->value;
249			}
250			break;
251			case FAMILY:
252			if (word == NULL)
253			break;
254			if (!strcmp(word, "inet") \|\|
255			!strcasecmp(word, "IPv4")) {
256			match++;
257			t = &table[i];
258			res->family = AF_INET;
259			}
260			if (!strcmp(word, "inet6") \|\|
261			!strcasecmp(word, "IPv6")) {
262			match++;
263			t = &table[i];
264			res->family = AF_INET6;
265			}
266			break;
267			case ADDRESS:
268			if (parse_addr(word, &res->family, &res->addr)) {
269			match++;
270			t = &table[i];
271			if (t->value)
272			res->action = t->value;
273			}
274			break;
275			case IFNAME:
276			if (!match && word != NULL && strlen(word) > 0) {
277			if (strlcpy(res->ifname, word,
278			sizeof(res->ifname)) >=
279			sizeof(res->ifname))
280			err(1, "interface name too long");
281			match++;
282			t = &table[i];
283			if (t->value)
284			res->action = t->value;
285			}
286			break;
287
288			case ENDTOKEN:
289			break;
290			}
291			}
292
293			if (match != 1) {
294			if (word == NULL)
295			fprintf(stderr, "missing argument:\n");
296			else if (match > 1)
297			fprintf(stderr, "ambiguous argument: %s\n", word);
298			else if (match < 1)
299			fprintf(stderr, "unknown argument: %s\n", word);
300			return (NULL);
301			}
302
303			return (t);
304			}
305
306			static void
307			show_valid_args(const struct token *table)
308			{
309			int i;
310
311			for (i = 0; table[i].type != ENDTOKEN; i++) {
312			switch (table[i].type) {
313			case NOTOKEN:
314			fprintf(stderr, " <cr>\n");
315			break;
316			case KEYWORD:
317			case FLAG:
318			fprintf(stderr, " %s\n", table[i].keyword);
319			break;
320			case FAMILY:
321			fprintf(stderr, " [ inet \| inet6 \| IPv4 \| IPv6 ]\n");
322			break;
323			case ADDRESS:
324			fprintf(stderr, " <address>\n");
325			break;
326			case IFNAME:
327			fprintf(stderr, " <interface>\n");
328			case ENDTOKEN:
329			break;
330			}
331			}
332			}
333
334			int
335			parse_addr(const char word, int family, union ldpd_addr *addr)
336			{
337			struct in_addr ina;
338			struct addrinfo hints, *r;
339			struct sockaddr_in6 *sa_in6;
340
341			if (word == NULL)
342			return (0);
343
344			memset(addr, 0, sizeof(*addr));
345			memset(&ina, 0, sizeof(ina));
346
347			if (inet_net_pton(AF_INET, word, &ina, sizeof(ina)) != -1) {
348			*family = AF_INET;
349			addr->v4.s_addr = ina.s_addr;
350			return (1);
351			}
352
353			memset(&hints, 0, sizeof(hints));
354			hints.ai_family = AF_INET6;
355			hints.ai_socktype = SOCK_DGRAM; /dummy/
356			hints.ai_flags = AI_NUMERICHOST;
357			if (getaddrinfo(word, "0", &hints, &r) == 0) {
358			sa_in6 = (struct sockaddr_in6 *)r->ai_addr;
359			*family = AF_INET6;
360			addr->v6 = sa_in6->sin6_addr;
361			freeaddrinfo(r);
362			return (1);
363			}
364
365			return (0);
366			}