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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include "list.h"
#include "l2tp.h"
#include "log.h"
#include "triton.h"
#include "memdebug.h"
struct l2tp_dict_t
{
struct list_head items;
};
static struct l2tp_dict_t *dict;
#define BUF_SIZE 1024
static char *path, *fname1, *buf;
struct l2tp_dict_attr_t *l2tp_dict_find_attr_by_name(const char *name)
{
struct l2tp_dict_attr_t *attr;
list_for_each_entry(attr, &dict->items, entry) {
if (!strcmp(attr->name, name))
return attr;
}
return NULL;
}
struct l2tp_dict_attr_t *l2tp_dict_find_attr_by_id(int id)
{
struct l2tp_dict_attr_t *attr;
list_for_each_entry(attr, &dict->items, entry) {
if (attr->id == id)
return attr;
}
return NULL;
}
const struct l2tp_dict_value_t *l2tp_dict_find_value(const struct l2tp_dict_attr_t *attr,
l2tp_value_t val)
{
const struct l2tp_dict_value_t *v;
list_for_each_entry(v, &attr->values, entry) {
switch (attr->type) {
case ATTR_TYPE_INT16:
if (v->val.int16 == val.int16)
return v;
break;
case ATTR_TYPE_INT32:
if (v->val.int32 == val.int32)
return v;
break;
}
}
return NULL;
}
static char *skip_word(char *ptr)
{
for(; *ptr; ptr++)
if (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')
break;
return ptr;
}
static char *skip_space(char *ptr)
{
for(; *ptr; ptr++)
if (*ptr != ' ' && *ptr != '\t')
break;
return ptr;
}
static int split(char *buf, char **ptr)
{
int i;
for (i = 0; i < 6; i++) {
buf = skip_word(buf);
if (!*buf)
return i;
*buf = 0;
buf = skip_space(buf + 1);
if (!*buf)
return i;
ptr[i] = buf;
}
buf = skip_word(buf);
//if (*buf == '\n')
*buf = 0;
//else if (*buf)
// return -1;
return i;
}
static int dict_load(const char *fname)
{
FILE *f;
char *ptr[6], *endptr;
struct l2tp_dict_attr_t *attr;
struct l2tp_dict_value_t *value;
struct list_head *items;
int i, r, n = 0;
f = fopen(fname, "r");
if (!f) {
log_emerg("l2tp: open '%s': %s\n", fname, strerror(errno));
return -1;
}
items = &dict->items;
while (fgets(buf, BUF_SIZE, f)) {
n++;
if (buf[0] == '#' || buf[0] == '\n' || buf[0] == 0)
continue;
r = split(buf, ptr);
if (!strcmp(buf, "$INCLUDE")) {
if (r != 1)
goto out_syntax;
for (i = strlen(path) - 1; i; i--) {
if (path[i] == '/') {
path[i + 1] = 0;
break;
}
}
strcpy(fname1, path);
strcat(fname1, ptr[0]);
if (dict_load(fname1))
goto out_err;
} else if (!strcmp(buf, "ATTRIBUTE")) {
if (r < 3)
goto out_syntax;
attr = malloc(sizeof(*attr));
memset(attr, 0, sizeof(*attr));
list_add_tail(&attr->entry, items);
INIT_LIST_HEAD(&attr->values);
attr->name = strdup(ptr[0]);
attr->id = strtol(ptr[1], &endptr, 10);
if (*endptr != 0)
goto out_syntax;
if (!strcmp(ptr[2], "none"))
attr->type = ATTR_TYPE_NONE;
else if (!strcmp(ptr[2], "int16"))
attr->type = ATTR_TYPE_INT16;
else if (!strcmp(ptr[2], "int32"))
attr->type = ATTR_TYPE_INT32;
else if (!strcmp(ptr[2], "int64"))
attr->type = ATTR_TYPE_INT64;
else if (!strcmp(ptr[2], "octets"))
attr->type = ATTR_TYPE_OCTETS;
else if (!strcmp(ptr[2], "string"))
attr->type = ATTR_TYPE_STRING;
else
goto out_syntax;
attr->M = -1;
attr->H = -1;
for (i = 3; i < r; i++) {
if (!strcmp(ptr[i], "M=0"))
attr->M = 0;
else if (!strcmp(ptr[i], "M=1"))
attr->M = 1;
else if (!strcmp(ptr[i], "H=0"))
attr->H = 0;
else if (!strcmp(ptr[i], "H=1"))
attr->H = 1;
else
goto out_syntax;
}
} else if (!strcmp(buf, "VALUE")) {
if (r != 3)
goto out_syntax;
attr = l2tp_dict_find_attr_by_name(ptr[0]);
if (!attr) {
log_emerg("l2tp:%s:%i: attribute not found\n", fname, n);
goto out_err;
}
value = malloc(sizeof(*value));
memset(value, 0, sizeof(*value));
list_add_tail(&value->entry, &attr->values);
value->name = strdup(ptr[1]);
switch (attr->type) {
case ATTR_TYPE_INT16:
case ATTR_TYPE_INT32:
value->val.int16 = strtol(ptr[2], &endptr, 10);
if (*endptr != 0)
goto out_syntax;
break;
case ATTR_TYPE_STRING:
value->val.string = strdup(ptr[2]);
break;
}
} else
goto out_syntax;
}
fclose(f);
return 0;
out_syntax:
log_emerg("l2tp:%s:%i: syntaxis error\n", fname, n);
out_err:
fclose(f);
return -1;
}
static int l2tp_dict_load(const char *fname)
{
int r;
dict = _malloc(sizeof(*dict));
memset(dict, 0, sizeof(*dict));
INIT_LIST_HEAD(&dict->items);
path = _malloc(PATH_MAX);
fname1 = _malloc(PATH_MAX);
buf = _malloc(BUF_SIZE);
strcpy(path, fname);
r = dict_load(fname);
_free(buf);
_free(fname1);
_free(path);
return r;
}
static void dict_init(void)
{
const char *opt;
opt = conf_get_opt("l2tp", "dictionary");
if (!opt)
opt = DICTIONARY;
if (l2tp_dict_load(opt))
_exit(EXIT_FAILURE);
}
DEFINE_INIT(20, dict_init);
|
