summaryrefslogtreecommitdiffstats
path: root/bin/tools/named-rrchecker.c
blob: d0081cac0a6669748dd7e1c63b1676e7995cb694 (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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#include <stdbool.h>
#include <stdlib.h>

#include <isc/buffer.h>
#include <isc/commandline.h>
#include <isc/lex.h>
#include <isc/mem.h>
#include <isc/print.h>
#include <isc/string.h>
#include <isc/util.h>

#include <dns/fixedname.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdatatype.h>
#include <dns/result.h>

static isc_mem_t *mctx;
static isc_lex_t *lex;

static isc_lexspecials_t specials;

ISC_PLATFORM_NORETURN_PRE static void
usage(void) ISC_PLATFORM_NORETURN_POST;

static void
usage(void) {
	fprintf(stderr, "usage: named-rrchecker [-o origin] [-hpCPTu]\n");
	fprintf(stderr, "\t-h: print this help message\n");
	fprintf(stderr, "\t-o origin: set origin to be used when "
			"interpreting the record\n");
	fprintf(stderr, "\t-p: print the record in canonical format\n");
	fprintf(stderr, "\t-C: list the supported class names\n");
	fprintf(stderr, "\t-P: list the supported private type names\n");
	fprintf(stderr, "\t-T: list the supported standard type names\n");
	fprintf(stderr, "\t-u: print the record in unknown record format\n");
	exit(0);
}

ISC_PLATFORM_NORETURN_PRE static void
fatal(const char *format, ...) ISC_PLATFORM_NORETURN_POST;

static void
fatal(const char *format, ...) {
	va_list args;

	fprintf(stderr, "named-rrchecker: ");
	va_start(args, format);
	vfprintf(stderr, format, args);
	va_end(args);
	fputc('\n', stderr);
	exit(1);
}

int
main(int argc, char *argv[]) {
	isc_token_t token;
	isc_result_t result;
	int c;
	unsigned int options = 0;
	dns_rdatatype_t rdtype;
	dns_rdataclass_t rdclass;
	char text[256 * 1024];
	char data[64 * 1024];
	isc_buffer_t tbuf;
	isc_buffer_t dbuf;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	bool doexit = false;
	bool once = false;
	bool print = false;
	bool unknown = false;
	unsigned int t;
	char *origin = NULL;
	dns_fixedname_t fixed;
	dns_name_t *name = NULL;

	while ((c = isc_commandline_parse(argc, argv, "ho:puCPT")) != -1) {
		switch (c) {
		case 'o':
			origin = isc_commandline_argument;
			break;

		case 'p':
			print = true;
			break;

		case 'u':
			unknown = true;
			break;

		case 'C':
			for (t = 1; t <= 0xfeffu; t++) {
				if (dns_rdataclass_ismeta(t)) {
					continue;
				}
				dns_rdataclass_format(t, text, sizeof(text));
				if (strncmp(text, "CLASS", 4) != 0) {
					fprintf(stdout, "%s\n", text);
				}
			}
			exit(0);

		case 'P':
			for (t = 0xff00; t <= 0xfffeu; t++) {
				if (dns_rdatatype_ismeta(t)) {
					continue;
				}
				dns_rdatatype_format(t, text, sizeof(text));
				if (strncmp(text, "TYPE", 4) != 0) {
					fprintf(stdout, "%s\n", text);
				}
			}
			doexit = true;
			break;

		case 'T':
			for (t = 1; t <= 0xfeffu; t++) {
				if (dns_rdatatype_ismeta(t)) {
					continue;
				}
				dns_rdatatype_format(t, text, sizeof(text));
				if (strncmp(text, "TYPE", 4) != 0) {
					fprintf(stdout, "%s\n", text);
				}
			}
			doexit = true;
			break;

		case '?':
		case 'h':
			/* Does not return. */
			usage();

		default:
			fprintf(stderr, "%s: unhandled option -%c\n", argv[0],
				isc_commandline_option);
			exit(1);
		}
	}
	if (doexit) {
		exit(0);
	}

	isc_mem_create(&mctx);
	RUNTIME_CHECK(isc_lex_create(mctx, 256, &lex) == ISC_R_SUCCESS);

	/*
	 * Set up to lex DNS master file.
	 */

	specials['('] = 1;
	specials[')'] = 1;
	specials['"'] = 1;
	isc_lex_setspecials(lex, specials);
	options = ISC_LEXOPT_EOL;
	isc_lex_setcomments(lex, ISC_LEXCOMMENT_DNSMASTERFILE);

	RUNTIME_CHECK(isc_lex_openstream(lex, stdin) == ISC_R_SUCCESS);

	if (origin != NULL) {
		name = dns_fixedname_initname(&fixed);
		result = dns_name_fromstring(name, origin, 0, NULL);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_name_fromstring: %s",
			      dns_result_totext(result));
		}
	}

	while ((result = isc_lex_gettoken(lex, options | ISC_LEXOPT_NUMBER,
					  &token)) == ISC_R_SUCCESS)
	{
		if (token.type == isc_tokentype_eof) {
			break;
		}
		if (token.type == isc_tokentype_eol) {
			continue;
		}
		if (once) {
			fatal("extra data");
		}
		/*
		 * Get class.
		 */
		if (token.type == isc_tokentype_number) {
			rdclass = (dns_rdataclass_t)token.value.as_ulong;
			if (token.value.as_ulong > 0xffffu) {
				fatal("class value too big %lu",
				      token.value.as_ulong);
			}
			if (dns_rdataclass_ismeta(rdclass)) {
				fatal("class %lu is a meta value",
				      token.value.as_ulong);
			}
		} else if (token.type == isc_tokentype_string) {
			result = dns_rdataclass_fromtext(
				&rdclass, &token.value.as_textregion);
			if (result != ISC_R_SUCCESS) {
				fatal("dns_rdataclass_fromtext: %s",
				      dns_result_totext(result));
			}
			if (dns_rdataclass_ismeta(rdclass)) {
				fatal("class %.*s(%d) is a meta value",
				      (int)token.value.as_textregion.length,
				      token.value.as_textregion.base, rdclass);
			}
		} else {
			fatal("unexpected token %u", token.type);
		}

		result = isc_lex_gettoken(lex, options | ISC_LEXOPT_NUMBER,
					  &token);
		if (result != ISC_R_SUCCESS) {
			break;
		}
		if (token.type == isc_tokentype_eol) {
			continue;
		}
		if (token.type == isc_tokentype_eof) {
			break;
		}

		/*
		 * Get type.
		 */
		if (token.type == isc_tokentype_number) {
			rdtype = (dns_rdatatype_t)token.value.as_ulong;
			if (token.value.as_ulong > 0xffffu) {
				fatal("type value too big %lu",
				      token.value.as_ulong);
			}
			if (dns_rdatatype_ismeta(rdtype)) {
				fatal("type %lu is a meta value",
				      token.value.as_ulong);
			}
		} else if (token.type == isc_tokentype_string) {
			result = dns_rdatatype_fromtext(
				&rdtype, &token.value.as_textregion);
			if (result != ISC_R_SUCCESS) {
				fatal("dns_rdatatype_fromtext: %s",
				      dns_result_totext(result));
			}
			if (dns_rdatatype_ismeta(rdtype)) {
				fatal("type %.*s(%d) is a meta value",
				      (int)token.value.as_textregion.length,
				      token.value.as_textregion.base, rdtype);
			}
		} else {
			fatal("unexpected token %u", token.type);
		}

		isc_buffer_init(&dbuf, data, sizeof(data));
		result = dns_rdata_fromtext(&rdata, rdclass, rdtype, lex, name,
					    0, mctx, &dbuf, NULL);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdata_fromtext: %s",
			      dns_result_totext(result));
		}
		once = true;
	}
	if (result != ISC_R_EOF) {
		fatal("eof not found");
	}
	if (!once) {
		fatal("no records found");
	}

	if (print) {
		isc_buffer_init(&tbuf, text, sizeof(text));
		result = dns_rdataclass_totext(rdclass, &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdataclass_totext: %s",
			      dns_result_totext(result));
		}
		isc_buffer_putstr(&tbuf, "\t");
		result = dns_rdatatype_totext(rdtype, &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdatatype_totext: %s",
			      dns_result_totext(result));
		}
		isc_buffer_putstr(&tbuf, "\t");
		result = dns_rdata_totext(&rdata, NULL, &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdata_totext: %s",
			      dns_result_totext(result));
		}

		printf("%.*s\n", (int)tbuf.used, (char *)tbuf.base);
		fflush(stdout);
	}

	if (unknown) {
		isc_buffer_init(&tbuf, text, sizeof(text));
		result = dns_rdataclass_tounknowntext(rdclass, &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdataclass_tounknowntext: %s",
			      dns_result_totext(result));
		}
		isc_buffer_putstr(&tbuf, "\t");
		result = dns_rdatatype_tounknowntext(rdtype, &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdatatype_tounknowntext: %s",
			      dns_result_totext(result));
		}
		isc_buffer_putstr(&tbuf, "\t");
		result = dns_rdata_tofmttext(&rdata, NULL,
					     DNS_STYLEFLAG_UNKNOWNFORMAT, 0, 0,
					     "", &tbuf);
		if (result != ISC_R_SUCCESS) {
			fatal("dns_rdata_tofmttext: %sn",
			      dns_result_totext(result));
		}

		printf("%.*s\n", (int)tbuf.used, (char *)tbuf.base);
		fflush(stdout);
	}

	isc_lex_close(lex);
	isc_lex_destroy(&lex);
	isc_mem_destroy(&mctx);
	return (0);
}