1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* $OpenBSD: parser.c,v 1.3 2006/12/16 17:53:03 deraadt Exp $ */
/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.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 <sys/queue.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <event.h>
#include "hostated.h"
#include "parser.h"
enum token_type {
NOTOKEN,
ENDTOKEN,
HOSTID,
TABLEID,
SERVICEID,
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_service[];
static const struct token t_table[];
static const struct token t_host[];
static const struct token t_service_id[];
static const struct token t_table_id[];
static const struct token t_host_id[];
static const struct token t_main[] = {
{KEYWORD, "show", SHOW_SUM, NULL},
{KEYWORD, "stop", SHUTDOWN, NULL},
{KEYWORD, "service", NULL, t_service},
{KEYWORD, "table", NULL, t_table},
{KEYWORD, "host", NULL, t_host},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_service[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "disable", SERV_DISABLE, t_service_id},
{KEYWORD, "enable", SERV_ENABLE, t_service_id},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_table[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "disable", TABLE_DISABLE, t_table_id},
{KEYWORD, "enable", TABLE_ENABLE, t_table_id},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_host[] = {
{NOTOKEN, "", NONE, NULL},
{KEYWORD, "disable", HOST_DISABLE, t_host_id},
{KEYWORD, "enable", HOST_ENABLE, t_host_id},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_service_id[] = {
{SERVICEID, "", NONE, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_table_id[] = {
{TABLEID, "", NONE, NULL},
{ENDTOKEN, "", NONE, NULL}
};
static const struct token t_host_id[] = {
{HOSTID, "", NONE, 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;
const char *errstr;
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 HOSTID:
res.id = strtonum(word, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "host id %s is %s", word, errstr);
t = &table[i];
match++;
break;
case TABLEID:
res.id = strtonum(word, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "table id %s is %s", word, errstr);
t = &table[i];
match++;
break;
case SERVICEID:
res.id = strtonum(word, 0, UINT_MAX, &errstr);
if (errstr)
errx(1, "service id %s is %s", word, errstr);
t = &table[i];
match++;
break;
case ENDTOKEN:
break;
}
}
if (match != 1) {
if (match > 1)
fprintf(stderr, "ambiguous argument: %s\n", word);
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:
fprintf(stderr, " %s\n", table[i].keyword);
break;
case SERVICEID:
fprintf(stderr, " <serviceid>\n");
break;
case TABLEID:
fprintf(stderr, " <tableid>\n");
break;
case HOSTID:
fprintf(stderr, " <hostid>\n");
break;
case ENDTOKEN:
break;
}
}
}
|
