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
|
/*
* FRR switchable defaults.
* Copyright (c) 2017-2019 David Lamparter, for NetDEF, Inc.
*
* 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 <zebra.h>
#include "defaults.h"
#include "version.h"
static char df_version[128] = FRR_VER_SHORT, df_profile[128] = DFLT_NAME;
static struct frr_default *dflt_first = NULL, **dflt_next = &dflt_first;
/* these are global for all FRR daemons. they have to be, since we write an
* integrated config with the same value for all daemons.
*/
const char *frr_defaults_profiles[] = {
"traditional",
"datacenter",
NULL,
};
static int version_value(int ch)
{
/* non-ASCII shouldn't happen */
if (ch < 0 || ch >= 128)
return 2;
/* ~foo sorts older than nothing */
if (ch == '~')
return 0;
if (ch == '\0')
return 1;
if (isalpha(ch))
return 0x100 + tolower(ch);
/* punctuation and digits (and everything else) */
return 0x200 + ch;
}
int frr_version_cmp(const char *aa, const char *bb)
{
const char *apos = aa, *bpos = bb;
/* || is correct, we won't scan past the end of a string since that
* doesn't compare equal to anything else */
while (apos[0] || bpos[0]) {
if (isdigit((unsigned char)apos[0]) &&
isdigit((unsigned char)bpos[0])) {
unsigned long av, bv;
char *aend = NULL, *bend = NULL;
av = strtoul(apos, &aend, 10);
bv = strtoul(bpos, &bend, 10);
if (av < bv)
return -1;
if (av > bv)
return 1;
apos = aend;
bpos = bend;
continue;
}
int a = version_value(*apos++);
int b = version_value(*bpos++);
if (a < b)
return -1;
if (a > b)
return 1;
}
return 0;
}
static void frr_default_apply_one(struct frr_default *dflt, bool check);
void frr_default_add(struct frr_default *dflt)
{
dflt->next = NULL;
*dflt_next = dflt;
dflt_next = &dflt->next;
frr_default_apply_one(dflt, true);
}
static bool frr_match_version(const char *name, const char *vspec,
const char *version, bool check)
{
int cmp;
static struct spec {
const char *str;
bool dir, eq;
} *s, specs[] = {
{"<=", -1, 1},
{">=", 1, 1},
{"==", 0, 1},
{"<", -1, 0},
{">", 1, 0},
{"=", 0, 1},
{NULL, 0, 0},
};
if (!vspec)
/* NULL = all versions */
return true;
for (s = specs; s->str; s++)
if (!strncmp(s->str, vspec, strlen(s->str)))
break;
if (!s->str) {
if (check)
fprintf(stderr, "invalid version specifier for %s: %s",
name, vspec);
/* invalid version spec, never matches */
return false;
}
vspec += strlen(s->str);
while (isspace((unsigned char)*vspec))
vspec++;
cmp = frr_version_cmp(version, vspec);
if (cmp == s->dir || (s->eq && cmp == 0))
return true;
return false;
}
static void frr_default_apply_one(struct frr_default *dflt, bool check)
{
struct frr_default_entry *entry = dflt->entries;
struct frr_default_entry *dfltentry = NULL, *saveentry = NULL;
for (; entry->match_version || entry->match_profile; entry++) {
if (entry->match_profile
&& strcmp(entry->match_profile, df_profile))
continue;
if (!dfltentry && frr_match_version(dflt->name,
entry->match_version, df_version, check))
dfltentry = entry;
if (!saveentry && frr_match_version(dflt->name,
entry->match_version, FRR_VER_SHORT, check))
saveentry = entry;
if (dfltentry && saveentry && !check)
break;
}
/* found default or arrived at last entry that has NULL,NULL spec */
if (!dfltentry)
dfltentry = entry;
if (!saveentry)
saveentry = entry;
if (dflt->dflt_str)
*dflt->dflt_str = dfltentry->val_str;
if (dflt->dflt_long)
*dflt->dflt_long = dfltentry->val_long;
if (dflt->dflt_ulong)
*dflt->dflt_ulong = dfltentry->val_ulong;
if (dflt->dflt_float)
*dflt->dflt_float = dfltentry->val_float;
if (dflt->save_str)
*dflt->save_str = saveentry->val_str;
if (dflt->save_long)
*dflt->save_long = saveentry->val_long;
if (dflt->save_ulong)
*dflt->save_ulong = saveentry->val_ulong;
if (dflt->save_float)
*dflt->save_float = saveentry->val_float;
}
void frr_defaults_apply(void)
{
struct frr_default *dflt;
for (dflt = dflt_first; dflt; dflt = dflt->next)
frr_default_apply_one(dflt, false);
}
bool frr_defaults_profile_valid(const char *profile)
{
const char **p;
for (p = frr_defaults_profiles; *p; p++)
if (!strcmp(profile, *p))
return true;
return false;
}
const char *frr_defaults_version(void)
{
return df_version;
}
const char *frr_defaults_profile(void)
{
return df_profile;
}
void frr_defaults_version_set(const char *version)
{
strlcpy(df_version, version, sizeof(df_version));
frr_defaults_apply();
}
void frr_defaults_profile_set(const char *profile)
{
strlcpy(df_profile, profile, sizeof(df_profile));
frr_defaults_apply();
}
|