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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/iscsictl/parser.c	Lines:	0	65	0.0 %
Date:	2017-11-07	Branches:	0	62	0.0 %


/*	$OpenBSD: parser.c,v 1.3 2014/04/21 17:44:47 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/queue.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <limits.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "iscsid.h"
#include "iscsictl.h"

enum token_type {
	NOTOKEN,
	ENDTOKEN,
	KEYWORD,
	ADDRESS,
	NAME,
	FLAG
};

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_log[];
static const struct token t_discovery[];
static const struct token t_session[];
static const struct token t_vscsi[];

static const struct token t_main[] = {
	{KEYWORD,	"reload",	RELOAD,		NULL},
	{KEYWORD,	"discover",	DISCOVERY,	t_discovery},
	{KEYWORD,	"show",		SHOW_SUM,	t_show},
	{KEYWORD,	"log",		NONE,		t_log},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_show[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{KEYWORD,	"summary",	SHOW_SUM,	NULL},
	{KEYWORD,	"session",	SHOW_SESS,	t_session},
	{KEYWORD,	"vscsi",	NONE,		t_vscsi},
	{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 t_discovery[] = {
	{ADDRESS,	"",		NONE,			NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_session[] = {
	{NAME,		"",		NONE,			NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_vscsi[] = {
	{KEYWORD,	"stats",	SHOW_VSCSI_STATS,	NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static struct parse_result	res;

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);
}

const struct token *
match_token(const char *word, const struct token *table)
{
	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 NAME:
			if (word != NULL && strlen(word) > 0) {
				if (strlcpy(res.name, word, sizeof(res.name)) >=
				    sizeof(res.name))
					errx(1, "name too long");
				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);
}

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 NAME:
			fprintf(stderr, "  <name>\n");
			break;
		case ENDTOKEN:
			break;
		}
	}
}

int
parse_addr(const char *word, struct sockaddr_storage *sa)
{
	struct addrinfo hints, *addrs;
	int rv;

	bzero(&hints, sizeof(hints));
	hints.ai_family = PF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_protocol = IPPROTO_TCP;

	if ((rv = getaddrinfo(word, "iscsi", &hints, &addrs)) == 0) {
		if (sizeof(*sa) < addrs->ai_addrlen)
			err(1, "parse_host: bork bork bork");
		bcopy(addrs->ai_addr, sa, addrs->ai_addrlen);
		freeaddrinfo(addrs);
		return (0);
	}

	errx(1, "parse_host: %s", gai_strerror(rv));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.3 2014/04/21 17:44:47 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/queue.h>
22			#include <sys/socket.h>
23			#include <sys/uio.h>
24			#include <netinet/in.h>
25			#include <err.h>
26			#include <errno.h>
27			#include <event.h>
28			#include <limits.h>
29			#include <netdb.h>
30			#include <stdio.h>
31			#include <stdlib.h>
32			#include <string.h>
33			#include <unistd.h>
34
35			#include "iscsid.h"
36			#include "iscsictl.h"
37
38			enum token_type {
39			NOTOKEN,
40			ENDTOKEN,
41			KEYWORD,
42			ADDRESS,
43			NAME,
44			FLAG
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_show[];
56			static const struct token t_log[];
57			static const struct token t_discovery[];
58			static const struct token t_session[];
59			static const struct token t_vscsi[];
60
61			static const struct token t_main[] = {
62			{KEYWORD, "reload", RELOAD, NULL},
63			{KEYWORD, "discover", DISCOVERY, t_discovery},
64			{KEYWORD, "show", SHOW_SUM, t_show},
65			{KEYWORD, "log", NONE, t_log},
66			{ENDTOKEN, "", NONE, NULL}
67			};
68
69			static const struct token t_show[] = {
70			{NOTOKEN, "", NONE, NULL},
71			{KEYWORD, "summary", SHOW_SUM, NULL},
72			{KEYWORD, "session", SHOW_SESS, t_session},
73			{KEYWORD, "vscsi", NONE, t_vscsi},
74			{ENDTOKEN, "", NONE, NULL}
75			};
76
77			static const struct token t_log[] = {
78			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
79			{KEYWORD, "brief", LOG_BRIEF, NULL},
80			{ENDTOKEN, "", NONE, NULL}
81			};
82
83			static const struct token t_discovery[] = {
84			{ADDRESS, "", NONE, NULL},
85			{ENDTOKEN, "", NONE, NULL}
86			};
87
88			static const struct token t_session[] = {
89			{NAME, "", NONE, NULL},
90			{ENDTOKEN, "", NONE, NULL}
91			};
92
93			static const struct token t_vscsi[] = {
94			{KEYWORD, "stats", SHOW_VSCSI_STATS, NULL},
95			{ENDTOKEN, "", NONE, NULL}
96			};
97
98			static struct parse_result res;
99
100			struct parse_result *
101			parse(int argc, char *argv[])
102			{
103			const struct token *table = t_main;
104			const struct token *match;
105
106			bzero(&res, sizeof(res));
107
108			while (argc >= 0) {
109			if ((match = match_token(argv[0], table)) == NULL) {
110			fprintf(stderr, "valid commands/args:\n");
111			show_valid_args(table);
112			return (NULL);
113			}
114
115			argc--;
116			argv++;
117
118			if (match->type == NOTOKEN \|\| match->next == NULL)
119			break;
120
121			table = match->next;
122			}
123
124			if (argc > 0) {
125			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
126			return (NULL);
127			}
128
129			return (&res);
130			}
131
132			const struct token *
133			match_token(const char word, const struct token table)
134			{
135			u_int i, match;
136			const struct token *t = NULL;
137
138			match = 0;
139
140			for (i = 0; table[i].type != ENDTOKEN; i++) {
141			switch (table[i].type) {
142			case NOTOKEN:
143			if (word == NULL \|\| strlen(word) == 0) {
144			match++;
145			t = &table[i];
146			}
147			break;
148			case KEYWORD:
149			if (word != NULL && strncmp(word, table[i].keyword,
150			strlen(word)) == 0) {
151			match++;
152			t = &table[i];
153			if (t->value)
154			res.action = t->value;
155			}
156			break;
157			case FLAG:
158			if (word != NULL && strncmp(word, table[i].keyword,
159			strlen(word)) == 0) {
160			match++;
161			t = &table[i];
162			res.flags \|= t->value;
163			}
164			break;
165			case ADDRESS:
166			if (!parse_addr(word, &res.addr)) {
167			match++;
168			t = &table[i];
169			if (t->value)
170			res.action = t->value;
171			}
172			break;
173			case NAME:
174			if (word != NULL && strlen(word) > 0) {
175			if (strlcpy(res.name, word, sizeof(res.name)) >=
176			sizeof(res.name))
177			errx(1, "name too long");
178			match++;
179			t = &table[i];
180			}
181			break;
182			case ENDTOKEN:
183			break;
184			}
185			}
186
187			if (match != 1) {
188			if (word == NULL)
189			fprintf(stderr, "missing argument:\n");
190			else if (match > 1)
191			fprintf(stderr, "ambiguous argument: %s\n", word);
192			else if (match < 1)
193			fprintf(stderr, "unknown argument: %s\n", word);
194			return (NULL);
195			}
196
197			return (t);
198			}
199
200			void
201			show_valid_args(const struct token *table)
202			{
203			int i;
204
205			for (i = 0; table[i].type != ENDTOKEN; i++) {
206			switch (table[i].type) {
207			case NOTOKEN:
208			fprintf(stderr, " <cr>\n");
209			break;
210			case KEYWORD:
211			case FLAG:
212			fprintf(stderr, " %s\n", table[i].keyword);
213			break;
214			case ADDRESS:
215			fprintf(stderr, " <address>\n");
216			break;
217			case NAME:
218			fprintf(stderr, " <name>\n");
219			break;
220			case ENDTOKEN:
221			break;
222			}
223			}
224			}
225
226			int
227			parse_addr(const char word, struct sockaddr_storage sa)
228			{
229			struct addrinfo hints, *addrs;
230			int rv;
231
232			bzero(&hints, sizeof(hints));
233			hints.ai_family = PF_UNSPEC;
234			hints.ai_socktype = SOCK_STREAM;
235			hints.ai_protocol = IPPROTO_TCP;
236
237			if ((rv = getaddrinfo(word, "iscsi", &hints, &addrs)) == 0) {
238			if (sizeof(*sa) < addrs->ai_addrlen)
239			err(1, "parse_host: bork bork bork");
240			bcopy(addrs->ai_addr, sa, addrs->ai_addrlen);
241			freeaddrinfo(addrs);
242			return (0);
243			}
244
245			errx(1, "parse_host: %s", gai_strerror(rv));
246			}