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/*
* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or 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 ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
/* $Id: wire_test.c,v 1.67 2007/06/19 23:46:59 tbox Exp $ */
#include <config.h>
#include <stdlib.h>
#include <isc/buffer.h>
#include <isc/commandline.h>
#include <isc/mem.h>
#include <isc/string.h>
#include <isc/util.h>
#include <dns/result.h>
#include "printmsg.h"
int parseflags = 0;
isc_mem_t *mctx;
isc_boolean_t printmemstats = ISC_FALSE;
isc_boolean_t dorender = ISC_FALSE;
static void
process_message(isc_buffer_t *source);
static inline void
CHECKRESULT(isc_result_t result, const char *msg) {
if (result != ISC_R_SUCCESS) {
printf("%s: %s\n", msg, dns_result_totext(result));
exit(1);
}
}
static int
fromhex(char c) {
if (c >= '0' && c <= '9')
return (c - '0');
else if (c >= 'a' && c <= 'f')
return (c - 'a' + 10);
else if (c >= 'A' && c <= 'F')
return (c - 'A' + 10);
printf("bad input format: %02x\n", c);
exit(3);
/* NOTREACHED */
}
static void
usage(void) {
fprintf(stderr, "wire_test [-p] [-b] [-s] [-r]\n");
fprintf(stderr, "\t-p\tPreserve order of the records in messages\n");
fprintf(stderr, "\t-b\tBest-effort parsing (ignore some errors)\n");
fprintf(stderr, "\t-s\tPrint memory statistics\n");
fprintf(stderr, "\t-r\tAfter parsing, re-render the message\n");
fprintf(stderr, "\t-t\tTCP mode - ignore the first 2 bytes\n");
}
int
main(int argc, char *argv[]) {
char *rp, *wp;
unsigned char *bp;
isc_buffer_t source;
size_t len, i;
int n;
FILE *f;
isc_boolean_t need_close = ISC_FALSE;
unsigned char b[64 * 1024];
char s[4000];
isc_boolean_t tcp = ISC_FALSE;
int ch;
mctx = NULL;
RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);
while ((ch = isc_commandline_parse(argc, argv, "pbsrt")) != -1) {
switch (ch) {
case 'p':
parseflags |= DNS_MESSAGEPARSE_PRESERVEORDER;
break;
case 'b':
parseflags |= DNS_MESSAGEPARSE_BESTEFFORT;
break;
case 's':
printmemstats = ISC_TRUE;
break;
case 'r':
dorender = ISC_TRUE;
break;
case 't':
tcp = ISC_TRUE;
break;
default:
usage();
exit(1);
}
}
argc -= isc_commandline_index;
argv += isc_commandline_index;
if (argc > 1) {
f = fopen(argv[1], "r");
if (f == NULL) {
printf("fopen failed\n");
exit(1);
}
need_close = ISC_TRUE;
} else
f = stdin;
bp = b;
while (fgets(s, sizeof(s), f) != NULL) {
rp = s;
wp = s;
len = 0;
while (*rp != '\0') {
if (*rp == '#')
break;
if (*rp != ' ' && *rp != '\t' &&
*rp != '\r' && *rp != '\n') {
*wp++ = *rp;
len++;
}
rp++;
}
if (len == 0U)
break;
if (len % 2 != 0U) {
printf("bad input format: %lu\n", (unsigned long)len);
exit(1);
}
if (len > sizeof(b) * 2) {
printf("input too long\n");
exit(2);
}
rp = s;
for (i = 0; i < len; i += 2) {
n = fromhex(*rp++);
n *= 16;
n += fromhex(*rp++);
*bp++ = n;
}
}
if (need_close)
fclose(f);
if (tcp) {
unsigned char *p = b;
while (p < bp) {
unsigned int len;
if (p + 2 > bp) {
printf("premature end of packet\n");
exit(1);
}
len = p[0] << 8 | p[1];
if (p + 2 + len > bp) {
printf("premature end of packet\n");
exit(1);
}
isc_buffer_init(&source, p + 2, len);
isc_buffer_add(&source, len);
process_message(&source);
p += 2 + len;
}
} else {
isc_buffer_init(&source, b, sizeof(b));
isc_buffer_add(&source, bp - b);
process_message(&source);
}
if (printmemstats)
isc_mem_stats(mctx, stdout);
isc_mem_destroy(&mctx);
return (0);
}
static void
process_message(isc_buffer_t *source) {
dns_message_t *message;
isc_result_t result;
int i;
message = NULL;
result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &message);
CHECKRESULT(result, "dns_message_create failed");
result = dns_message_parse(message, source, parseflags);
if (result == DNS_R_RECOVERABLE)
result = ISC_R_SUCCESS;
CHECKRESULT(result, "dns_message_parse failed");
result = printmessage(message);
CHECKRESULT(result, "printmessage() failed");
if (printmemstats)
isc_mem_stats(mctx, stdout);
if (dorender) {
unsigned char b2[64 * 1024];
isc_buffer_t buffer;
dns_compress_t cctx;
isc_buffer_init(&buffer, b2, sizeof(b2));
/*
* XXXMLG
* Changing this here is a hack, and should not be done in
* reasonable application code, ever.
*/
message->from_to_wire = DNS_MESSAGE_INTENTRENDER;
for (i = 0; i < DNS_SECTION_MAX; i++)
message->counts[i] = 0; /* Another hack XXX */
result = dns_compress_init(&cctx, -1, mctx);
CHECKRESULT(result, "dns_compress_init() failed");
result = dns_message_renderbegin(message, &cctx, &buffer);
CHECKRESULT(result, "dns_message_renderbegin() failed");
result = dns_message_rendersection(message,
DNS_SECTION_QUESTION, 0);
CHECKRESULT(result,
"dns_message_rendersection(QUESTION) failed");
result = dns_message_rendersection(message,
DNS_SECTION_ANSWER, 0);
CHECKRESULT(result,
"dns_message_rendersection(ANSWER) failed");
result = dns_message_rendersection(message,
DNS_SECTION_AUTHORITY, 0);
CHECKRESULT(result,
"dns_message_rendersection(AUTHORITY) failed");
result = dns_message_rendersection(message,
DNS_SECTION_ADDITIONAL, 0);
CHECKRESULT(result,
"dns_message_rendersection(ADDITIONAL) failed");
dns_message_renderend(message);
dns_compress_invalidate(&cctx);
message->from_to_wire = DNS_MESSAGE_INTENTPARSE;
dns_message_destroy(&message);
printf("Message rendered.\n");
if (printmemstats)
isc_mem_stats(mctx, stdout);
result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE,
&message);
CHECKRESULT(result, "dns_message_create failed");
result = dns_message_parse(message, &buffer, parseflags);
CHECKRESULT(result, "dns_message_parse failed");
result = printmessage(message);
CHECKRESULT(result, "printmessage() failed");
}
dns_message_destroy(&message);
}
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