host.c

bind 9.3结合mysql数据库

	/*
	 * We get called multiple times.
	 * Preserve any existing error status.
	 */
	force_error = (seen_error == 1) ? 1 : 0;
	seen_error = 1;
	if (listed_server) {
		char sockstr[ISC_SOCKADDR_FORMATSIZE];

		printf("Using domain server:\n");
		printf("Name: %s\n", query->servname);
		isc_sockaddr_format(&query->sockaddr, sockstr,
				    sizeof(sockstr));
		printf("Address: %s\n", sockstr);
		printf("Aliases: \n\n");
	}

	if (msg->rcode != 0) {
		char namestr[DNS_NAME_FORMATSIZE];
		dns_name_format(query->lookup->name, namestr, sizeof(namestr));
		printf("Host %s not found: %d(%s)\n", namestr,
		       msg->rcode, rcodetext[msg->rcode]);
		return (ISC_R_SUCCESS);
	}

	if (default_lookups && query->lookup->rdtype == dns_rdatatype_a) {
		char namestr[DNS_NAME_FORMATSIZE];
		dig_lookup_t *lookup;

		/* Add AAAA and MX lookups. */

		dns_name_format(query->lookup->name, namestr, sizeof(namestr));
		lookup = clone_lookup(query->lookup, ISC_FALSE);
		if (lookup != NULL) {
			strncpy(lookup->textname, namestr,
				sizeof(lookup->textname));
			lookup->textname[sizeof(lookup->textname)-1] = 0;
			lookup->rdtype = dns_rdatatype_aaaa;
                        lookup->rdtypeset = ISC_TRUE;
			lookup->origin = NULL;
			lookup->retries = tries;
			ISC_LIST_APPEND(lookup_list, lookup, link);
		}
		lookup = clone_lookup(query->lookup, ISC_FALSE);
		if (lookup != NULL) {
			strncpy(lookup->textname, namestr,
				sizeof(lookup->textname));
			lookup->textname[sizeof(lookup->textname)-1] = 0;
			lookup->rdtype = dns_rdatatype_mx;
                        lookup->rdtypeset = ISC_TRUE;
			lookup->origin = NULL;
			lookup->retries = tries;
			ISC_LIST_APPEND(lookup_list, lookup, link);
		}
	}

	if (!short_form) {
		printf(";; ->>HEADER<<- opcode: %s, status: %s, id: %u\n",
		       opcodetext[msg->opcode], rcodetext[msg->rcode],
		       msg->id);
		printf(";; flags: ");
		if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0) {
			printf("qr");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0) {
			printf("%saa", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0) {
			printf("%stc", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0) {
			printf("%srd", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0) {
			printf("%sra", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0) {
			printf("%sad", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0) {
			printf("%scd", did_flag ? " " : "");
			did_flag = ISC_TRUE;
		}
		printf("; QUERY: %u, ANSWER: %u, "
		       "AUTHORITY: %u, ADDITIONAL: %u\n",
		       msg->counts[DNS_SECTION_QUESTION],
		       msg->counts[DNS_SECTION_ANSWER],
		       msg->counts[DNS_SECTION_AUTHORITY],
		       msg->counts[DNS_SECTION_ADDITIONAL]);
		opt = dns_message_getopt(msg);
		if (opt != NULL)
			printf(";; EDNS: version: %u, udp=%u\n",
			       (unsigned int)((opt->ttl & 0x00ff0000) >> 16),
			       (unsigned int)opt->rdclass);
		tsigname = NULL;
		tsig = dns_message_gettsig(msg, &tsigname);
		if (tsig != NULL)
			printf(";; PSEUDOSECTIONS: TSIG\n");
	}
	if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_QUESTION]) &&
	    !short_form) {
		printf("\n");
		result = printsection(msg, DNS_SECTION_QUESTION, "QUESTION",
				      ISC_TRUE, query);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
		if (!short_form)
			printf("\n");
		result = printsection(msg, DNS_SECTION_ANSWER, "ANSWER",
				      ISC_TF(!short_form), query);
		if (result != ISC_R_SUCCESS)
			return (result);
	}

	if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_AUTHORITY]) &&
	    !short_form) {
		printf("\n");
		result = printsection(msg, DNS_SECTION_AUTHORITY, "AUTHORITY",
				      ISC_TRUE, query);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	if (! ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ADDITIONAL]) &&
	    !short_form) {
		printf("\n");
		result = printsection(msg, DNS_SECTION_ADDITIONAL,
				      "ADDITIONAL", ISC_TRUE, query);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	if ((tsig != NULL) && !short_form) {
		printf("\n");
		result = printrdata(msg, tsig, tsigname,
				    "PSEUDOSECTION TSIG", ISC_TRUE);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	if (!short_form)
		printf("\n");

	if (short_form && !default_lookups &&
	    ISC_LIST_EMPTY(msg->sections[DNS_SECTION_ANSWER])) {
		char namestr[DNS_NAME_FORMATSIZE];
		char typestr[DNS_RDATATYPE_FORMATSIZE];
		dns_name_format(query->lookup->name, namestr, sizeof(namestr));
		dns_rdatatype_format(query->lookup->rdtype, typestr,
				     sizeof(typestr));
		printf("%s has no %s record\n", namestr, typestr);
	}
	seen_error = force_error;
	return (result);
}

static void
parse_args(isc_boolean_t is_batchfile, int argc, char **argv) {
	char hostname[MXNAME];
	dig_lookup_t *lookup;
	int c;
	char store[MXNAME];
	isc_textregion_t tr;
	isc_result_t result = ISC_R_SUCCESS;
	dns_rdatatype_t rdtype;
	dns_rdataclass_t rdclass;
	isc_uint32_t serial = 0;

	UNUSED(is_batchfile);

	lookup = make_empty_lookup();

	while ((c = isc_commandline_parse(argc, argv, "lvwrdt:c:aTCN:R:W:Dni46"))
	       != EOF) {
		switch (c) {
		case 'l':
			lookup->tcp_mode = ISC_TRUE;
			lookup->rdtype = dns_rdatatype_axfr;
			lookup->rdtypeset = ISC_TRUE;
			fatalexit = 3;
			break;
		case 'v':
		case 'd':
			short_form = ISC_FALSE;
			break;
		case 'r':
			lookup->recurse = ISC_FALSE;
			break;
		case 't':
			if (strncasecmp(isc_commandline_argument,
					"ixfr=", 5) == 0) {
				rdtype = dns_rdatatype_ixfr;
				/* XXXMPA add error checking */
				serial = strtoul(isc_commandline_argument + 5,
						 NULL, 10);
				result = ISC_R_SUCCESS;
			} else {
				tr.base = isc_commandline_argument;
				tr.length = strlen(isc_commandline_argument);
				result = dns_rdatatype_fromtext(&rdtype,
						   (isc_textregion_t *)&tr);
			}

			if (result != ISC_R_SUCCESS) {
				fatalexit = 2;
				fatal("invalid type: %s\n",
				      isc_commandline_argument);
			}
			if (!lookup->rdtypeset ||
			    lookup->rdtype != dns_rdatatype_axfr)
				lookup->rdtype = rdtype;
			lookup->rdtypeset = ISC_TRUE;
			if (rdtype == dns_rdatatype_axfr) {
				/* -l -t any -v */
				list_type = dns_rdatatype_any;
				short_form = ISC_FALSE;
				lookup->tcp_mode = ISC_TRUE;
			} else if (rdtype == dns_rdatatype_ixfr) {
				lookup->ixfr_serial = serial;
				list_type = rdtype;
			} else
				list_type = rdtype;
			list_addresses = ISC_FALSE;
			break;
		case 'c':
			tr.base = isc_commandline_argument;
			tr.length = strlen(isc_commandline_argument);
			result = dns_rdataclass_fromtext(&rdclass,
						   (isc_textregion_t *)&tr);

			if (result != ISC_R_SUCCESS) {
				fatalexit = 2;
				fatal("invalid class: %s\n",
				      isc_commandline_argument);
			} else {
				lookup->rdclass = rdclass;
				lookup->rdclassset = ISC_TRUE;
			}
			default_lookups = ISC_FALSE;
			break;
		case 'a':
			if (!lookup->rdtypeset ||
			    lookup->rdtype != dns_rdatatype_axfr)
				lookup->rdtype = dns_rdatatype_any;
			list_type = dns_rdatatype_any;
			list_addresses = ISC_FALSE;
			lookup->rdtypeset = ISC_TRUE;
			short_form = ISC_FALSE;
			default_lookups = ISC_FALSE;
			break;
		case 'i':
			lookup->ip6_int = ISC_TRUE;
			break;
		case 'n':
			/* deprecated */
			break;
		case 'w':
			/*
			 * The timer routines are coded such that
			 * timeout==MAXINT doesn't enable the timer
			 */
			timeout = INT_MAX;
			break;
		case 'W':
			timeout = atoi(isc_commandline_argument);
			if (timeout < 1)
				timeout = 1;
			break;
		case 'R':
			tries = atoi(isc_commandline_argument) + 1;
			if (tries < 2)
				tries = 2;
			break;
		case 'T':
			lookup->tcp_mode = ISC_TRUE;
			break;
		case 'C':
			debug("showing all SOAs");
			lookup->rdtype = dns_rdatatype_ns;
			lookup->rdtypeset = ISC_TRUE;
			lookup->rdclass = dns_rdataclass_in;
			lookup->rdclassset = ISC_TRUE;
			lookup->ns_search_only = ISC_TRUE;
			lookup->trace_root = ISC_TRUE;
			lookup->identify_previous_line = ISC_TRUE;
			default_lookups = ISC_FALSE;
			break;
		case 'N':
			debug("setting NDOTS to %s",
			      isc_commandline_argument);
			ndots = atoi(isc_commandline_argument);
			break;
		case 'D':
			debugging = ISC_TRUE;
			break;
		case '4':
			if (have_ipv4) {
				isc_net_disableipv6();
				have_ipv6 = ISC_FALSE;
			} else
				fatal("can't find IPv4 networking");
			break;
		case '6':
			if (have_ipv6) {
				isc_net_disableipv4();
				have_ipv4 = ISC_FALSE;
			} else
				fatal("can't find IPv6 networking");
			break;
		}
	}

	lookup->retries = tries;

	if (isc_commandline_index >= argc)
		show_usage();

	strncpy(hostname, argv[isc_commandline_index], sizeof(hostname));
	hostname[sizeof(hostname)-1]=0;
	if (argc > isc_commandline_index + 1) {
		set_nameserver(argv[isc_commandline_index+1]);
		debug("server is %s", argv[isc_commandline_index+1]);
		listed_server = ISC_TRUE;
	}

	lookup->pending = ISC_FALSE;
	if (get_reverse(store, sizeof(store), hostname,
			lookup->ip6_int, ISC_TRUE) == ISC_R_SUCCESS) {
		strncpy(lookup->textname, store, sizeof(lookup->textname));
		lookup->textname[sizeof(lookup->textname)-1] = 0;
		lookup->rdtype = dns_rdatatype_ptr;
		lookup->rdtypeset = ISC_TRUE;
		default_lookups = ISC_FALSE;
	} else {
		strncpy(lookup->textname, hostname, sizeof(lookup->textname));
		lookup->textname[sizeof(lookup->textname)-1]=0;
	}
	lookup->new_search = ISC_TRUE;
	ISC_LIST_APPEND(lookup_list, lookup, link);

	usesearch = ISC_TRUE;
}

int
main(int argc, char **argv) {
	isc_result_t result;

	tries = 2;

	ISC_LIST_INIT(lookup_list);
	ISC_LIST_INIT(server_list);
	ISC_LIST_INIT(search_list);
	
	fatalexit = 1;

	debug("main()");
	progname = argv[0];
	result = isc_app_start();
	check_result(result, "isc_app_start");
	setup_libs();
	parse_args(ISC_FALSE, argc, argv);
	setup_system();
	result = isc_app_onrun(mctx, global_task, onrun_callback, NULL);
	check_result(result, "isc_app_onrun");
	isc_app_run();
	cancel_all();
	destroy_libs();
	isc_app_finish();
	return ((seen_error == 0) ? 0 : 1);
}