/*
 * Copyright (C) 1999, 2000  Internet Software Consortium.
 * 
 * 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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 <config.h>

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <isc/assertions.h>
#include <isc/error.h>
#include <isc/boolean.h>
#include <isc/region.h>

#include <dns/types.h>
#include <dns/result.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdatatype.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/compress.h>
#include <dns/message.h>

#include "printmsg.h"

static inline void
CHECKRESULT(isc_result_t result, char *msg)
{
	if (result != DNS_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 */
}

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[1000];
	char s[1000];
	dns_message_t *message;
	isc_result_t result;
	isc_mem_t *mctx;

	mctx = NULL;
	RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);
	
	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 != ' ' && *rp != '\t' &&
			    *rp != '\r' && *rp != '\n') {
				*wp++ = *rp;
				len++;
			}
			rp++;
		}
		if (len == 0)
			break;
		if (len % 2 != 0) {
			printf("bad input format: %d\n", 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);

	isc_buffer_init(&source, b, sizeof b, ISC_BUFFERTYPE_BINARY);
	isc_buffer_add(&source, bp - b);

	message = NULL;
	result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &message);
	CHECKRESULT(result, "dns_message_create failed");

	result = dns_message_parse(message, &source, ISC_FALSE);
	CHECKRESULT(result, "dns_message_parse failed");

	result = printmessage(message);
	CHECKRESULT(result, "printmessage() failed");

	isc_mem_stats(mctx, stdout);

	/*
	 * XXXMLG
	 * Changing this here is a hack, and should not be done in reasonable
	 * application code, ever.
	 */
	message->from_to_wire = DNS_MESSAGE_INTENTRENDER;
	memset(b, 0, sizeof(b));
	isc_buffer_clear(&source);

	for (i = 0 ; i < DNS_SECTION_MAX ; i++)
		message->counts[i] = 0;  /* Another hack XXX */

	result = dns_message_renderbegin(message, &source);
	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");

	result = dns_message_rendersection(message, DNS_SECTION_TSIG, 0);
	CHECKRESULT(result, "dns_message_rendersection(TSIG) failed");

	dns_message_renderend(message);

	message->from_to_wire = DNS_MESSAGE_INTENTPARSE;
	dns_message_destroy(&message);

	printf("Message rendered.\n");
	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, &source, ISC_FALSE);
	CHECKRESULT(result, "dns_message_parse failed");

	result = printmessage(message);
	CHECKRESULT(result, "printmessage() failed");

	dns_message_destroy(&message);

	isc_mem_stats(mctx, stdout);
	isc_mem_destroy(&mctx);

	return (0);
}