summaryrefslogtreecommitdiff
path: root/networking/libiproute/rt_names.c
blob: 3c2fad9126a220f29da418d85a99fcad47556063 (plain)
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
/* vi: set sw=4 ts=4: */
/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 */
#include "libbb.h"
#include "rt_names.h"

#define CONFDIR          CONFIG_FEATURE_IP_ROUTE_DIR

typedef struct rtnl_tab_t {
	const char *cached_str;
	unsigned cached_result;
	/* upstream version switched to a hash table and removed
	 * id < 256 limit. For now bbox bumps this array size from 256
	 * to 1024. If you plan to change this to a hash table,
	 * consider merging several hash tables we have (for example,
	 * awk has resizable one!
	 */
#define RT_TABLE_MAX 1023
	const char *tab[RT_TABLE_MAX+1];
} rtnl_tab_t;

static void rtnl_tab_initialize(const char *file, const char **tab)
{
	char *token[2];
	char fullname[sizeof(CONFDIR"/rt_dsfield") + 8];
	parser_t *parser;

	sprintf(fullname, CONFDIR"/rt_%s", file);
	parser = config_open2(fullname, fopen_for_read);
	while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL)) {
		unsigned id = bb_strtou(token[0], NULL, 0);
		if (id > RT_TABLE_MAX) {
			bb_error_msg("database %s is corrupted at line %d",
				file, parser->lineno);
			break;
		}
		tab[id] = xstrdup(token[1]);
	}
	config_close(parser);
}

static int rtnl_a2n(rtnl_tab_t *tab, uint32_t *id, const char *arg, int base)
{
	unsigned i;

	if (tab->cached_str && strcmp(tab->cached_str, arg) == 0) {
		*id = tab->cached_result;
		return 0;
	}

	for (i = 0; i <= RT_TABLE_MAX; i++) {
		if (tab->tab[i]
		 && strcmp(tab->tab[i], arg) == 0
		) {
			tab->cached_str = tab->tab[i];
			tab->cached_result = i;
			*id = i;
			return 0;
		}
	}

	i = bb_strtou(arg, NULL, base);
	if (i > RT_TABLE_MAX)
		return -1;
	*id = i;
	return 0;
}


static rtnl_tab_t *rtnl_rtprot_tab;

static void rtnl_rtprot_initialize(void)
{
	static const char *const init_tab[] ALIGN_PTR = {
		"none",
		"redirect",
		"kernel",
		"boot",
		"static",
		NULL,
		NULL,
		NULL,
		"gated",
		"ra",
		"mrt",
		"zebra",
		"bird",
	};

	if (rtnl_rtprot_tab)
		return;
	rtnl_rtprot_tab = xzalloc(sizeof(*rtnl_rtprot_tab));
	memcpy(rtnl_rtprot_tab->tab, init_tab, sizeof(init_tab));
	rtnl_tab_initialize("protos", rtnl_rtprot_tab->tab);
}

#if 0 /* UNUSED */
const char* FAST_FUNC rtnl_rtprot_n2a(int id)
{
	if (id < 0 || id > RT_TABLE_MAX) {
		return itoa(id);
	}

	rtnl_rtprot_initialize();

	if (rtnl_rtprot_tab->tab[id])
		return rtnl_rtprot_tab->tab[id];
	return itoa(id);
}
#endif

int FAST_FUNC rtnl_rtprot_a2n(uint32_t *id, char *arg)
{
	rtnl_rtprot_initialize();
	return rtnl_a2n(rtnl_rtprot_tab, id, arg, 0);
}


static rtnl_tab_t *rtnl_rtscope_tab;

static void rtnl_rtscope_initialize(void)
{
	if (rtnl_rtscope_tab)
		return;
	rtnl_rtscope_tab = xzalloc(sizeof(*rtnl_rtscope_tab));
	rtnl_rtscope_tab->tab[0] = "global";
	rtnl_rtscope_tab->tab[255] = "nowhere";
	rtnl_rtscope_tab->tab[254] = "host";
	rtnl_rtscope_tab->tab[253] = "link";
	rtnl_rtscope_tab->tab[200] = "site";
	rtnl_tab_initialize("scopes", rtnl_rtscope_tab->tab);
}

const char* FAST_FUNC rtnl_rtscope_n2a(int id)
{
	if (id < 0 || id > RT_TABLE_MAX) {
		return itoa(id);
	}

	rtnl_rtscope_initialize();

	if (rtnl_rtscope_tab->tab[id])
		return rtnl_rtscope_tab->tab[id];
	return itoa(id);
}

int FAST_FUNC rtnl_rtscope_a2n(uint32_t *id, char *arg)
{
	rtnl_rtscope_initialize();
	return rtnl_a2n(rtnl_rtscope_tab, id, arg, 0);
}


static rtnl_tab_t *rtnl_rtrealm_tab;

static void rtnl_rtrealm_initialize(void)
{
	if (rtnl_rtrealm_tab) return;
	rtnl_rtrealm_tab = xzalloc(sizeof(*rtnl_rtrealm_tab));
	rtnl_rtrealm_tab->tab[0] = "unknown";
	rtnl_tab_initialize("realms", rtnl_rtrealm_tab->tab);
}

int FAST_FUNC rtnl_rtrealm_a2n(uint32_t *id, char *arg)
{
	rtnl_rtrealm_initialize();
	return rtnl_a2n(rtnl_rtrealm_tab, id, arg, 0);
}

#if ENABLE_FEATURE_IP_RULE
const char* FAST_FUNC rtnl_rtrealm_n2a(int id)
{
	if (id < 0 || id > RT_TABLE_MAX) {
		return itoa(id);
	}

	rtnl_rtrealm_initialize();

	if (rtnl_rtrealm_tab->tab[id])
		return rtnl_rtrealm_tab->tab[id];
	return itoa(id);
}
#endif


static rtnl_tab_t *rtnl_rtdsfield_tab;

static void rtnl_rtdsfield_initialize(void)
{
	if (rtnl_rtdsfield_tab) return;
	rtnl_rtdsfield_tab = xzalloc(sizeof(*rtnl_rtdsfield_tab));
	rtnl_rtdsfield_tab->tab[0] = "0";
	rtnl_tab_initialize("dsfield", rtnl_rtdsfield_tab->tab);
}

const char* FAST_FUNC rtnl_dsfield_n2a(int id)
{
	if (id < 0 || id > RT_TABLE_MAX) {
		return itoa(id);
	}

	rtnl_rtdsfield_initialize();

	if (rtnl_rtdsfield_tab->tab[id])
		return rtnl_rtdsfield_tab->tab[id];
	return itoa(id);
}

int FAST_FUNC rtnl_dsfield_a2n(uint32_t *id, char *arg)
{
	rtnl_rtdsfield_initialize();
	return rtnl_a2n(rtnl_rtdsfield_tab, id, arg, 16);
}


#if ENABLE_FEATURE_IP_RULE
static rtnl_tab_t *rtnl_rttable_tab;

static void rtnl_rttable_initialize(void)
{
	if (rtnl_rttable_tab)
		return;

	rtnl_rttable_tab = xzalloc(sizeof(*rtnl_rttable_tab));
	rtnl_rttable_tab->tab[0] = "unspec";
	rtnl_rttable_tab->tab[255] = "local";
	rtnl_rttable_tab->tab[254] = "main";
	rtnl_rttable_tab->tab[253] = "default";
	rtnl_tab_initialize("tables", rtnl_rttable_tab->tab);
}

const char* FAST_FUNC rtnl_rttable_n2a(int id)
{
	if (id < 0 || id > RT_TABLE_MAX) {
		return itoa(id);
	}

	rtnl_rttable_initialize();

	if (rtnl_rttable_tab->tab[id])
		return rtnl_rttable_tab->tab[id];
	return itoa(id);
}

int FAST_FUNC rtnl_rttable_a2n(uint32_t *id, char *arg)
{
	rtnl_rttable_initialize();
	return rtnl_a2n(rtnl_rttable_tab, id, arg, 0);
}

#endif