Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/slaacctl/parser.c	Lines:	24	47	51.1 %
Date:	2017-11-07	Branches:	21	48	43.8 %


/*	$OpenBSD: parser.c,v 1.1 2017/04/10 13:35:42 florian 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 <netinet/in.h>
#include <arpa/inet.h>

#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <err.h>
#include <errno.h>
#include <event.h>
#include <imsg.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "slaacd.h"
#include "parser.h"

enum token_type {
	NOTOKEN,
	ENDTOKEN,
	INTERFACENAME,
	KEYWORD
};

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_log[];
static const struct token t_show[];
static const struct token t_show_interface[];
static const struct token t_send[];
static const struct token t_send_sol[];

static const struct token t_main[] = {
	{KEYWORD,	"show",		SHOW,		t_show},
	{KEYWORD,	"log",		NONE,		t_log},
	{KEYWORD,	"send",		NONE,		t_send},
	{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_show[] = {
	{KEYWORD,	"interface",	SHOW_INTERFACE,  t_show_interface},
	{ENDTOKEN,	"",		NONE,		NULL}
};

static const struct token t_send[] = {
	{KEYWORD,	"solicitation", SEND_SOLICITATION,	t_send_sol},
	{ENDTOKEN,	"",		NONE,			NULL}
};
static const struct token t_send_sol[] = {
	{INTERFACENAME,	"",		SEND_SOLICITATION,	NULL},
	{ENDTOKEN,	"",		NONE,			NULL}
};

static const struct token t_show_interface[] = {
	{NOTOKEN,	"",		NONE,		NULL},
	{INTERFACENAME,	"",		SHOW_INTERFACE,	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)
{
	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 INTERFACENAME:
			if (!match && word != NULL && strlen(word) > 0) {
				if ((res->if_index = if_nametoindex(word)) == 0)
					errx(1, "unknown interface");
				match++;
				t = &table[i];
				if (t->value)
					res->action = t->value;
			}
			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 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 INTERFACENAME:
			fprintf(stderr, " <interface>\n");
			break;
		case KEYWORD:
			fprintf(stderr, "  %s\n", table[i].keyword);
			break;
		case ENDTOKEN:
			break;
		}
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: parser.c,v 1.1 2017/04/10 13:35:42 florian 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 <netinet/in.h>
24			#include <arpa/inet.h>
25
26			#include <net/if.h>
27			#include <netinet/in.h>
28			#include <netinet/if_ether.h>
29
30			#include <err.h>
31			#include <errno.h>
32			#include <event.h>
33			#include <imsg.h>
34			#include <limits.h>
35			#include <stdio.h>
36			#include <stdlib.h>
37			#include <string.h>
38
39			#include "slaacd.h"
40			#include "parser.h"
41
42			enum token_type {
43			NOTOKEN,
44			ENDTOKEN,
45			INTERFACENAME,
46			KEYWORD
47			};
48
49			struct token {
50			enum token_type type;
51			const char *keyword;
52			int value;
53			const struct token *next;
54			};
55
56			static const struct token t_main[];
57			static const struct token t_log[];
58			static const struct token t_show[];
59			static const struct token t_show_interface[];
60			static const struct token t_send[];
61			static const struct token t_send_sol[];
62
63			static const struct token t_main[] = {
64			{KEYWORD, "show", SHOW, t_show},
65			{KEYWORD, "log", NONE, t_log},
66			{KEYWORD, "send", NONE, t_send},
67			{ENDTOKEN, "", NONE, NULL}
68			};
69
70			static const struct token t_log[] = {
71			{KEYWORD, "verbose", LOG_VERBOSE, NULL},
72			{KEYWORD, "brief", LOG_BRIEF, NULL},
73			{ENDTOKEN, "", NONE, NULL}
74			};
75
76			static const struct token t_show[] = {
77			{KEYWORD, "interface", SHOW_INTERFACE, t_show_interface},
78			{ENDTOKEN, "", NONE, NULL}
79			};
80
81			static const struct token t_send[] = {
82			{KEYWORD, "solicitation", SEND_SOLICITATION, t_send_sol},
83			{ENDTOKEN, "", NONE, NULL}
84			};
85			static const struct token t_send_sol[] = {
86			{INTERFACENAME, "", SEND_SOLICITATION, NULL},
87			{ENDTOKEN, "", NONE, NULL}
88			};
89
90			static const struct token t_show_interface[] = {
91			{NOTOKEN, "", NONE, NULL},
92			{INTERFACENAME, "", SHOW_INTERFACE, NULL},
93			{ENDTOKEN, "", NONE, NULL}
94			};
95
96			static const struct token match_token(const char , const struct token *,
97			struct parse_result *);
98			static void show_valid_args(const struct token *);
99
100			struct parse_result *
101			parse(int argc, char *argv[])
102			{
103			static struct parse_result res;
104			const struct token *table = t_main;
105			const struct token *match;
106
107		36	memset(&res, 0, sizeof(res));
108
109	✓✗	108	while (argc >= 0) {
110	✗✓	54	if ((match = match_token(argv[0], table, &res)) == NULL) {
111			fprintf(stderr, "valid commands/args:\n");
112			show_valid_args(table);
113			return (NULL);
114			}
115
116		54	argc--;
117		54	argv++;
118
119	✓✗✓✓	108	if (match->type == NOTOKEN \|\| match->next == NULL)
120			break;
121
122			table = match->next;
123			}
124
125	✗✓	18	if (argc > 0) {
126			fprintf(stderr, "superfluous argument: %s\n", argv[0]);
127			return (NULL);
128			}
129
130		18	return (&res);
131		18	}
132
133			static const struct token *
134			match_token(const char word, const struct token table,
135			struct parse_result *res)
136			{
137			u_int i, match;
138			const struct token *t = NULL;
139
140			match = 0;
141
142	✓✓	342	for (i = 0; table[i].type != ENDTOKEN; i++) {
143	✗✓✓✓	180	switch (table[i].type) {
144			case NOTOKEN:
145			if (word == NULL \|\| strlen(word) == 0) {
146			match++;
147			t = &table[i];
148			}
149			break;
150			case INTERFACENAME:
151	✓✗✓✗	36	if (!match && word != NULL && strlen(word) > 0) {
152	✗✓	18	if ((res->if_index = if_nametoindex(word)) == 0)
153			errx(1, "unknown interface");
154		18	match++;
155			t = &table[i];
156	✓✗	18	if (t->value)
157		18	res->action = t->value;
158			}
159			break;
160			case KEYWORD:
161	✓✗✓✓	288	if (word != NULL && strncmp(word, table[i].keyword,
162		144	strlen(word)) == 0) {
163		36	match++;
164			t = &table[i];
165	✓✓	36	if (t->value)
166		18	res->action = t->value;
167			}
168			break;
169			case ENDTOKEN:
170			break;
171			}
172			}
173
174	✗✓	54	if (match != 1) {
175			if (word == NULL)
176			fprintf(stderr, "missing argument:\n");
177			else if (match > 1)
178			fprintf(stderr, "ambiguous argument: %s\n", word);
179			else if (match < 1)
180			fprintf(stderr, "unknown argument: %s\n", word);
181			return (NULL);
182			}
183
184		54	return (t);
185		54	}
186
187			static void
188			show_valid_args(const struct token *table)
189			{
190			int i;
191
192			for (i = 0; table[i].type != ENDTOKEN; i++) {
193			switch (table[i].type) {
194			case NOTOKEN:
195			fprintf(stderr, " <cr>\n");
196			break;
197			case INTERFACENAME:
198			fprintf(stderr, " <interface>\n");
199			break;
200			case KEYWORD:
201			fprintf(stderr, " %s\n", table[i].keyword);
202			break;
203			case ENDTOKEN:
204			break;
205			}
206			}
207			}