/libc/dns/resolv/res_debug.c
C | 1233 lines | 904 code | 157 blank | 172 comment | 222 complexity | dd8326afb6abbf543042a2bdd1dcf66d MD5 | raw file
- /* $NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs Exp $ */
- /*
- * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC")
- * Portions Copyright (C) 1996-2003 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.
- */
- /*
- * Copyright (c) 1985
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- /*
- * Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
- * 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, and that
- * the name of Digital Equipment Corporation not be used in advertising or
- * publicity pertaining to distribution of the document or software without
- * specific, written prior permission.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
- * CORPORATION 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.
- */
- /*
- * Portions Copyright (c) 1995 by International Business Machines, Inc.
- *
- * International Business Machines, Inc. (hereinafter called IBM) grants
- * permission under its copyrights to use, copy, modify, and distribute this
- * Software with or without fee, provided that the above copyright notice and
- * all paragraphs of this notice appear in all copies, and that the name of IBM
- * not be used in connection with the marketing of any product incorporating
- * the Software or modifications thereof, without specific, written prior
- * permission.
- *
- * To the extent it has a right to do so, IBM grants an immunity from suit
- * under its patents, if any, for the use, sale or manufacture of products to
- * the extent that such products are used for performing Domain Name System
- * dynamic updates in TCP/IP networks by means of the Software. No immunity is
- * granted for any product per se or for any other function of any product.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
- * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
- * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
- * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
- */
- #include <sys/cdefs.h>
- #if defined(LIBC_SCCS) && !defined(lint)
- #ifdef notdef
- static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
- static const char rcsid[] = "Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp";
- #else
- __RCSID("$NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs Exp $");
- #endif
- #endif /* LIBC_SCCS and not lint */
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <arpa/nameser.h>
- #include <ctype.h>
- #include <errno.h>
- #include <math.h>
- #include <netdb.h>
- #include "resolv_private.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <strings.h>
- #include <time.h>
- #ifdef SPRINTF_CHAR
- # define SPRINTF(x) strlen(sprintf/**/x)
- #else
- # define SPRINTF(x) sprintf x
- #endif
- extern const char * const _res_opcodes[];
- extern const char * const _res_sectioncodes[];
- #ifndef _LIBC
- /*
- * Print the current options.
- */
- void
- fp_resstat(const res_state statp, FILE *file) {
- u_long mask;
- fprintf(file, ";; res options:");
- for (mask = 1; mask != 0U; mask <<= 1)
- if (statp->options & mask)
- fprintf(file, " %s", p_option(mask));
- putc('\n', file);
- }
- #endif
- static void
- do_section(const res_state statp,
- ns_msg *handle, ns_sect section,
- int pflag, FILE *file)
- {
- int n, sflag, rrnum;
- int buflen = 2048;
- char *buf;
- ns_opcode opcode;
- ns_rr rr;
- /*
- * Print answer records.
- */
- sflag = (int)(statp->pfcode & pflag);
- if (statp->pfcode && !sflag)
- return;
- buf = malloc((size_t)buflen);
- if (buf == NULL) {
- fprintf(file, ";; memory allocation failure\n");
- return;
- }
- opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
- rrnum = 0;
- for (;;) {
- if (ns_parserr(handle, section, rrnum, &rr)) {
- if (errno != ENODEV)
- fprintf(file, ";; ns_parserr: %s\n",
- strerror(errno));
- else if (rrnum > 0 && sflag != 0 &&
- (statp->pfcode & RES_PRF_HEAD1))
- putc('\n', file);
- goto cleanup;
- }
- if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
- fprintf(file, ";; %s SECTION:\n",
- p_section(section, opcode));
- if (section == ns_s_qd)
- fprintf(file, ";;\t%s, type = %s, class = %s\n",
- ns_rr_name(rr),
- p_type(ns_rr_type(rr)),
- p_class(ns_rr_class(rr)));
- else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
- size_t rdatalen, ttl;
- uint16_t optcode, optlen;
- rdatalen = ns_rr_rdlen(rr);
- ttl = ns_rr_ttl(rr);
- fprintf(file,
- "; EDNS: version: %zu, udp=%u, flags=%04zx\n",
- (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
- while (rdatalen >= 4) {
- const u_char *cp = ns_rr_rdata(rr);
- int i;
- GETSHORT(optcode, cp);
- GETSHORT(optlen, cp);
- if (optcode == NS_OPT_NSID) {
- fputs("; NSID: ", file);
- if (optlen == 0) {
- fputs("; NSID\n", file);
- } else {
- fputs("; NSID: ", file);
- for (i = 0; i < optlen; i++)
- fprintf(file, "%02x ",
- cp[i]);
- fputs(" (",file);
- for (i = 0; i < optlen; i++)
- fprintf(file, "%c",
- isprint(cp[i])?
- cp[i] : '.');
- fputs(")\n", file);
- }
- } else {
- if (optlen == 0) {
- fprintf(file, "; OPT=%u\n",
- optcode);
- } else {
- fprintf(file, "; OPT=%u: ",
- optcode);
- for (i = 0; i < optlen; i++)
- fprintf(file, "%02x ",
- cp[i]);
- fputs(" (",file);
- for (i = 0; i < optlen; i++)
- fprintf(file, "%c",
- isprint(cp[i]) ?
- cp[i] : '.');
- fputs(")\n", file);
- }
- }
- rdatalen -= 4 + optlen;
- }
- } else {
- n = ns_sprintrr(handle, &rr, NULL, NULL,
- buf, (u_int)buflen);
- if (n < 0) {
- if (errno == ENOSPC) {
- free(buf);
- buf = NULL;
- if (buflen < 131072)
- buf = malloc((size_t)(buflen += 1024));
- if (buf == NULL) {
- fprintf(file,
- ";; memory allocation failure\n");
- return;
- }
- continue;
- }
- fprintf(file, ";; ns_sprintrr: %s\n",
- strerror(errno));
- goto cleanup;
- }
- fputs(buf, file);
- fputc('\n', file);
- }
- rrnum++;
- }
- cleanup:
- if (buf != NULL)
- free(buf);
- }
- /*
- * Print the contents of a query.
- * This is intended to be primarily a debugging routine.
- */
- void
- res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
- ns_msg handle;
- int qdcount, ancount, nscount, arcount;
- u_int opcode, rcode, id;
- if (ns_initparse(msg, len, &handle) < 0) {
- fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
- return;
- }
- opcode = ns_msg_getflag(handle, ns_f_opcode);
- rcode = ns_msg_getflag(handle, ns_f_rcode);
- id = ns_msg_id(handle);
- qdcount = ns_msg_count(handle, ns_s_qd);
- ancount = ns_msg_count(handle, ns_s_an);
- nscount = ns_msg_count(handle, ns_s_ns);
- arcount = ns_msg_count(handle, ns_s_ar);
- /*
- * Print header fields.
- */
- if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
- fprintf(file,
- ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
- _res_opcodes[opcode], p_rcode((int)rcode), id);
- if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
- putc(';', file);
- if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
- fprintf(file, "; flags:");
- if (ns_msg_getflag(handle, ns_f_qr))
- fprintf(file, " qr");
- if (ns_msg_getflag(handle, ns_f_aa))
- fprintf(file, " aa");
- if (ns_msg_getflag(handle, ns_f_tc))
- fprintf(file, " tc");
- if (ns_msg_getflag(handle, ns_f_rd))
- fprintf(file, " rd");
- if (ns_msg_getflag(handle, ns_f_ra))
- fprintf(file, " ra");
- if (ns_msg_getflag(handle, ns_f_z))
- fprintf(file, " ??");
- if (ns_msg_getflag(handle, ns_f_ad))
- fprintf(file, " ad");
- if (ns_msg_getflag(handle, ns_f_cd))
- fprintf(file, " cd");
- }
- if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
- fprintf(file, "; %s: %d",
- p_section(ns_s_qd, (int)opcode), qdcount);
- fprintf(file, ", %s: %d",
- p_section(ns_s_an, (int)opcode), ancount);
- fprintf(file, ", %s: %d",
- p_section(ns_s_ns, (int)opcode), nscount);
- fprintf(file, ", %s: %d",
- p_section(ns_s_ar, (int)opcode), arcount);
- }
- if ((!statp->pfcode) || (statp->pfcode &
- (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
- putc('\n',file);
- }
- /*
- * Print the various sections.
- */
- do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
- do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
- do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
- do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
- if (qdcount == 0 && ancount == 0 &&
- nscount == 0 && arcount == 0)
- putc('\n', file);
- }
- const u_char *
- p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
- char name[MAXDNAME];
- int n;
- if ((n = dn_expand(msg, msg + len, cp, name, (int)sizeof name)) < 0)
- return (NULL);
- if (name[0] == '\0')
- putc('.', file);
- else
- fputs(name, file);
- return (cp + n);
- }
- const u_char *
- p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
- return (p_cdnname(cp, msg, PACKETSZ, file));
- }
- /* Return a fully-qualified domain name from a compressed name (with
- length supplied). */
- const u_char *
- p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name,
- int namelen)
- {
- int n;
- size_t newlen;
- if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
- return (NULL);
- newlen = strlen(name);
- if (newlen == 0 || name[newlen - 1] != '.') {
- if ((int)newlen + 1 >= namelen) /* Lack space for final dot */
- return (NULL);
- else
- strcpy(name + newlen, ".");
- }
- return (cp + n);
- }
- /* XXX: the rest of these functions need to become length-limited, too. */
- const u_char *
- p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
- char name[MAXDNAME];
- const u_char *n;
- n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name);
- if (n == NULL)
- return (NULL);
- fputs(name, file);
- return (n);
- }
- /*
- * Names of RR classes and qclasses. Classes and qclasses are the same, except
- * that C_ANY is a qclass but not a class. (You can ask for records of class
- * C_ANY, but you can't have any records of that class in the database.)
- */
- const struct res_sym __p_class_syms[] = {
- {C_IN, "IN", (char *)0},
- {C_CHAOS, "CH", (char *)0},
- {C_CHAOS, "CHAOS", (char *)0},
- {C_HS, "HS", (char *)0},
- {C_HS, "HESIOD", (char *)0},
- {C_ANY, "ANY", (char *)0},
- {C_NONE, "NONE", (char *)0},
- {C_IN, (char *)0, (char *)0}
- };
- /*
- * Names of message sections.
- */
- static const struct res_sym __p_default_section_syms[] = {
- {ns_s_qd, "QUERY", (char *)0},
- {ns_s_an, "ANSWER", (char *)0},
- {ns_s_ns, "AUTHORITY", (char *)0},
- {ns_s_ar, "ADDITIONAL", (char *)0},
- {0, (char *)0, (char *)0}
- };
- static const struct res_sym __p_update_section_syms[] = {
- {S_ZONE, "ZONE", (char *)0},
- {S_PREREQ, "PREREQUISITE", (char *)0},
- {S_UPDATE, "UPDATE", (char *)0},
- {S_ADDT, "ADDITIONAL", (char *)0},
- {0, (char *)0, (char *)0}
- };
- const struct res_sym __p_key_syms[] = {
- {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
- {NS_ALG_DH, "DH", "Diffie Hellman"},
- {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
- {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
- {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
- {0, NULL, NULL}
- };
- const struct res_sym __p_cert_syms[] = {
- {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
- {cert_t_spki, "SPKI", "SPKI certificate"},
- {cert_t_pgp, "PGP", "PGP certificate"},
- {cert_t_url, "URL", "URL Private"},
- {cert_t_oid, "OID", "OID Private"},
- {0, NULL, NULL}
- };
- /*
- * Names of RR types and qtypes. Types and qtypes are the same, except
- * that T_ANY is a qtype but not a type. (You can ask for records of type
- * T_ANY, but you can't have any records of that type in the database.)
- */
- const struct res_sym __p_type_syms[] = {
- {ns_t_a, "A", "address"},
- {ns_t_ns, "NS", "name server"},
- {ns_t_md, "MD", "mail destination (deprecated)"},
- {ns_t_mf, "MF", "mail forwarder (deprecated)"},
- {ns_t_cname, "CNAME", "canonical name"},
- {ns_t_soa, "SOA", "start of authority"},
- {ns_t_mb, "MB", "mailbox"},
- {ns_t_mg, "MG", "mail group member"},
- {ns_t_mr, "MR", "mail rename"},
- {ns_t_null, "NULL", "null"},
- {ns_t_wks, "WKS", "well-known service (deprecated)"},
- {ns_t_ptr, "PTR", "domain name pointer"},
- {ns_t_hinfo, "HINFO", "host information"},
- {ns_t_minfo, "MINFO", "mailbox information"},
- {ns_t_mx, "MX", "mail exchanger"},
- {ns_t_txt, "TXT", "text"},
- {ns_t_rp, "RP", "responsible person"},
- {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
- {ns_t_x25, "X25", "X25 address"},
- {ns_t_isdn, "ISDN", "ISDN address"},
- {ns_t_rt, "RT", "router"},
- {ns_t_nsap, "NSAP", "nsap address"},
- {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
- {ns_t_sig, "SIG", "signature"},
- {ns_t_key, "KEY", "key"},
- {ns_t_px, "PX", "mapping information"},
- {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
- {ns_t_aaaa, "AAAA", "IPv6 address"},
- {ns_t_loc, "LOC", "location"},
- {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
- {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
- {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
- {ns_t_srv, "SRV", "server selection"},
- {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
- {ns_t_naptr, "NAPTR", "naptr"},
- {ns_t_kx, "KX", "key exchange"},
- {ns_t_cert, "CERT", "certificate"},
- {ns_t_a6, "A", "IPv6 address (experminental)"},
- {ns_t_dname, "DNAME", "non-terminal redirection"},
- {ns_t_opt, "OPT", "opt"},
- {ns_t_apl, "apl", "apl"},
- {ns_t_ds, "DS", "delegation signer"},
- {ns_t_sshfp, "SSFP", "SSH fingerprint"},
- {ns_t_ipseckey, "IPSECKEY", "IPSEC key"},
- {ns_t_rrsig, "RRSIG", "rrsig"},
- {ns_t_nsec, "NSEC", "nsec"},
- {ns_t_dnskey, "DNSKEY", "DNS key"},
- {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"},
- {ns_t_nsec3, "NSEC3", "nsec3"},
- {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"},
- {ns_t_hip, "HIP", "host identity protocol"},
- {ns_t_spf, "SPF", "sender policy framework"},
- {ns_t_tkey, "TKEY", "tkey"},
- {ns_t_tsig, "TSIG", "transaction signature"},
- {ns_t_ixfr, "IXFR", "incremental zone transfer"},
- {ns_t_axfr, "AXFR", "zone transfer"},
- {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
- {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
- {ns_t_maila, "MAILA", "mail agent (deprecated)"},
- {ns_t_naptr, "NAPTR", "URN Naming Authority"},
- {ns_t_kx, "KX", "Key Exchange"},
- {ns_t_cert, "CERT", "Certificate"},
- {ns_t_a6, "A6", "IPv6 Address"},
- {ns_t_dname, "DNAME", "dname"},
- {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
- {ns_t_opt, "OPT", "EDNS Options"},
- {ns_t_any, "ANY", "\"any\""},
- {ns_t_dlv, "DLV", "DNSSEC look-aside validation"},
- {0, NULL, NULL}
- };
- /*
- * Names of DNS rcodes.
- */
- const struct res_sym __p_rcode_syms[] = {
- {ns_r_noerror, "NOERROR", "no error"},
- {ns_r_formerr, "FORMERR", "format error"},
- {ns_r_servfail, "SERVFAIL", "server failed"},
- {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
- {ns_r_notimpl, "NOTIMP", "not implemented"},
- {ns_r_refused, "REFUSED", "refused"},
- {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
- {ns_r_yxrrset, "YXRRSET", "rrset exists"},
- {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
- {ns_r_notauth, "NOTAUTH", "not authoritative"},
- {ns_r_notzone, "NOTZONE", "Not in zone"},
- {ns_r_max, "", ""},
- {ns_r_badsig, "BADSIG", "bad signature"},
- {ns_r_badkey, "BADKEY", "bad key"},
- {ns_r_badtime, "BADTIME", "bad time"},
- {0, NULL, NULL}
- };
- int
- sym_ston(const struct res_sym *syms, const char *name, int *success) {
- for (; syms->name != 0; syms++) {
- if (strcasecmp (name, syms->name) == 0) {
- if (success)
- *success = 1;
- return (syms->number);
- }
- }
- if (success)
- *success = 0;
- return (syms->number); /* The default value. */
- }
- const char *
- sym_ntos(const struct res_sym *syms, int number, int *success) {
- static char unname[20];
- for (; syms->name != 0; syms++) {
- if (number == syms->number) {
- if (success)
- *success = 1;
- return (syms->name);
- }
- }
- sprintf(unname, "%d", number); /* XXX nonreentrant */
- if (success)
- *success = 0;
- return (unname);
- }
- const char *
- sym_ntop(const struct res_sym *syms, int number, int *success) {
- static char unname[20];
- for (; syms->name != 0; syms++) {
- if (number == syms->number) {
- if (success)
- *success = 1;
- return (syms->humanname);
- }
- }
- sprintf(unname, "%d", number); /* XXX nonreentrant */
- if (success)
- *success = 0;
- return (unname);
- }
- /*
- * Return a string for the type.
- */
- const char *
- p_type(int type) {
- int success;
- const char *result;
- static char typebuf[20];
- result = sym_ntos(__p_type_syms, type, &success);
- if (success)
- return (result);
- if (type < 0 || type > 0xffff)
- return ("BADTYPE");
- sprintf(typebuf, "TYPE%d", type);
- return (typebuf);
- }
- /*
- * Return a string for the type.
- */
- const char *
- p_section(int section, int opcode) {
- const struct res_sym *symbols;
- switch (opcode) {
- case ns_o_update:
- symbols = __p_update_section_syms;
- break;
- default:
- symbols = __p_default_section_syms;
- break;
- }
- return (sym_ntos(symbols, section, (int *)0));
- }
- /*
- * Return a mnemonic for class.
- */
- const char *
- p_class(int class) {
- int success;
- const char *result;
- static char classbuf[20];
- result = sym_ntos(__p_class_syms, class, &success);
- if (success)
- return (result);
- if (class < 0 || class > 0xffff)
- return ("BADCLASS");
- sprintf(classbuf, "CLASS%d", class);
- return (classbuf);
- }
- /*
- * Return a mnemonic for an option
- */
- const char *
- p_option(u_long option) {
- static char nbuf[40];
- switch (option) {
- case RES_INIT: return "init";
- case RES_DEBUG: return "debug";
- case RES_AAONLY: return "aaonly(unimpl)";
- case RES_USEVC: return "usevc";
- case RES_PRIMARY: return "primry(unimpl)";
- case RES_IGNTC: return "igntc";
- case RES_RECURSE: return "recurs";
- case RES_DEFNAMES: return "defnam";
- case RES_STAYOPEN: return "styopn";
- case RES_DNSRCH: return "dnsrch";
- case RES_INSECURE1: return "insecure1";
- case RES_INSECURE2: return "insecure2";
- case RES_NOALIASES: return "noaliases";
- case RES_USE_INET6: return "inet6";
- #ifdef RES_USE_EDNS0 /* KAME extension */
- case RES_USE_EDNS0: return "edns0";
- #endif
- #ifdef RES_USE_DNAME
- case RES_USE_DNAME: return "dname";
- #endif
- #ifdef RES_USE_DNSSEC
- case RES_USE_DNSSEC: return "dnssec";
- #endif
- #ifdef RES_NOTLDQUERY
- case RES_NOTLDQUERY: return "no-tld-query";
- #endif
- #ifdef RES_NO_NIBBLE2
- case RES_NO_NIBBLE2: return "no-nibble2";
- #endif
- /* XXX nonreentrant */
- default: sprintf(nbuf, "?0x%lx?", (u_long)option);
- return (nbuf);
- }
- }
- /*
- * Return a mnemonic for a time to live.
- */
- const char *
- p_time(u_int32_t value) {
- static char nbuf[40]; /* XXX nonreentrant */
- if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
- sprintf(nbuf, "%u", value);
- return (nbuf);
- }
- /*
- * Return a string for the rcode.
- */
- const char *
- p_rcode(int rcode) {
- return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
- }
- /*
- * Return a string for a res_sockaddr_union.
- */
- const char *
- p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
- char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
- switch (u.sin.sin_family) {
- case AF_INET:
- inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret);
- break;
- #ifdef HAS_INET6_STRUCTS
- case AF_INET6:
- inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
- break;
- #endif
- default:
- sprintf(ret, "[af%d]", u.sin.sin_family);
- break;
- }
- if (size > 0U) {
- strncpy(buf, ret, size - 1);
- buf[size - 1] = '0';
- }
- return (buf);
- }
- /*
- * routines to convert between on-the-wire RR format and zone file format.
- * Does not contain conversion to/from decimal degrees; divide or multiply
- * by 60*60*1000 for that.
- */
- static const unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
- 1000000,10000000,100000000,1000000000};
- /* takes an XeY precision/size value, returns a string representation. */
- static const char *
- precsize_ntoa(u_int32_t prec)
- {
- static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */
- unsigned long val;
- int mantissa, exponent;
- mantissa = (int)((prec >> 4) & 0x0f) % 10;
- exponent = (int)((prec >> 0) & 0x0f) % 10;
- val = mantissa * poweroften[exponent];
- (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
- return (retbuf);
- }
- /* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
- static u_int8_t
- precsize_aton(const char **strptr) {
- unsigned int mval = 0, cmval = 0;
- u_int8_t retval = 0;
- const char *cp;
- int exponent;
- int mantissa;
- cp = *strptr;
- while (isdigit((unsigned char)*cp))
- mval = mval * 10 + (*cp++ - '0');
- if (*cp == '.') { /* centimeters */
- cp++;
- if (isdigit((unsigned char)*cp)) {
- cmval = (*cp++ - '0') * 10;
- if (isdigit((unsigned char)*cp)) {
- cmval += (*cp++ - '0');
- }
- }
- }
- cmval = (mval * 100) + cmval;
- for (exponent = 0; exponent < 9; exponent++)
- if (cmval < poweroften[exponent+1])
- break;
- mantissa = cmval / poweroften[exponent];
- if (mantissa > 9)
- mantissa = 9;
- retval = (mantissa << 4) | exponent;
- *strptr = cp;
- return (retval);
- }
- /* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
- static u_int32_t
- latlon2ul(const char **latlonstrptr, int *which) {
- const char *cp;
- u_int32_t retval;
- int deg = 0, min = 0, secs = 0, secsfrac = 0;
- cp = *latlonstrptr;
- while (isdigit((unsigned char)*cp))
- deg = deg * 10 + (*cp++ - '0');
- while (isspace((unsigned char)*cp))
- cp++;
- if (!(isdigit((unsigned char)*cp)))
- goto fndhemi;
- while (isdigit((unsigned char)*cp))
- min = min * 10 + (*cp++ - '0');
- while (isspace((unsigned char)*cp))
- cp++;
- if (!(isdigit((unsigned char)*cp)))
- goto fndhemi;
- while (isdigit((unsigned char)*cp))
- secs = secs * 10 + (*cp++ - '0');
- if (*cp == '.') { /* decimal seconds */
- cp++;
- if (isdigit((unsigned char)*cp)) {
- secsfrac = (*cp++ - '0') * 100;
- if (isdigit((unsigned char)*cp)) {
- secsfrac += (*cp++ - '0') * 10;
- if (isdigit((unsigned char)*cp)) {
- secsfrac += (*cp++ - '0');
- }
- }
- }
- }
- while (!isspace((unsigned char)*cp)) /* if any trailing garbage */
- cp++;
- while (isspace((unsigned char)*cp))
- cp++;
- fndhemi:
- switch (*cp) {
- case 'N': case 'n':
- case 'E': case 'e':
- retval = ((unsigned)1<<31)
- + (((((deg * 60) + min) * 60) + secs) * 1000)
- + secsfrac;
- break;
- case 'S': case 's':
- case 'W': case 'w':
- retval = ((unsigned)1<<31)
- - (((((deg * 60) + min) * 60) + secs) * 1000)
- - secsfrac;
- break;
- default:
- retval = 0; /* invalid value -- indicates error */
- break;
- }
- switch (*cp) {
- case 'N': case 'n':
- case 'S': case 's':
- *which = 1; /* latitude */
- break;
- case 'E': case 'e':
- case 'W': case 'w':
- *which = 2; /* longitude */
- break;
- default:
- *which = 0; /* error */
- break;
- }
- cp++; /* skip the hemisphere */
- while (!isspace((unsigned char)*cp)) /* if any trailing garbage */
- cp++;
- while (isspace((unsigned char)*cp)) /* move to next field */
- cp++;
- *latlonstrptr = cp;
- return (retval);
- }
- /* converts a zone file representation in a string to an RDATA on-the-wire
- * representation. */
- int
- loc_aton(const char *ascii, u_char *binary)
- {
- const char *cp, *maxcp;
- u_char *bcp;
- u_int32_t latit = 0, longit = 0, alt = 0;
- u_int32_t lltemp1 = 0, lltemp2 = 0;
- int altmeters = 0, altfrac = 0, altsign = 1;
- u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */
- u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */
- u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */
- int which1 = 0, which2 = 0;
- cp = ascii;
- maxcp = cp + strlen(ascii);
- lltemp1 = latlon2ul(&cp, &which1);
- lltemp2 = latlon2ul(&cp, &which2);
- switch (which1 + which2) {
- case 3: /* 1 + 2, the only valid combination */
- if ((which1 == 1) && (which2 == 2)) { /* normal case */
- latit = lltemp1;
- longit = lltemp2;
- } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
- longit = lltemp1;
- latit = lltemp2;
- } else { /* some kind of brokenness */
- return (0);
- }
- break;
- default: /* we didn't get one of each */
- return (0);
- }
- /* altitude */
- if (*cp == '-') {
- altsign = -1;
- cp++;
- }
- if (*cp == '+')
- cp++;
- while (isdigit((unsigned char)*cp))
- altmeters = altmeters * 10 + (*cp++ - '0');
- if (*cp == '.') { /* decimal meters */
- cp++;
- if (isdigit((unsigned char)*cp)) {
- altfrac = (*cp++ - '0') * 10;
- if (isdigit((unsigned char)*cp)) {
- altfrac += (*cp++ - '0');
- }
- }
- }
- alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
- while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
- cp++;
- while (isspace((unsigned char)*cp) && (cp < maxcp))
- cp++;
- if (cp >= maxcp)
- goto defaults;
- siz = precsize_aton(&cp);
- while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
- cp++;
- while (isspace((unsigned char)*cp) && (cp < maxcp))
- cp++;
- if (cp >= maxcp)
- goto defaults;
- hp = precsize_aton(&cp);
- while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
- cp++;
- while (isspace((unsigned char)*cp) && (cp < maxcp))
- cp++;
- if (cp >= maxcp)
- goto defaults;
- vp = precsize_aton(&cp);
- defaults:
- bcp = binary;
- *bcp++ = (u_int8_t) 0; /* version byte */
- *bcp++ = siz;
- *bcp++ = hp;
- *bcp++ = vp;
- PUTLONG(latit,bcp);
- PUTLONG(longit,bcp);
- PUTLONG(alt,bcp);
- return (16); /* size of RR in octets */
- }
- /* takes an on-the-wire LOC RR and formats it in a human readable format. */
- const char *
- loc_ntoa(const u_char *binary, char *ascii)
- {
- static const char *error = "?";
- static char tmpbuf[sizeof
- "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
- const u_char *cp = binary;
- int latdeg, latmin, latsec, latsecfrac;
- int longdeg, longmin, longsec, longsecfrac;
- char northsouth, eastwest;
- const char *altsign;
- int altmeters, altfrac;
- const u_int32_t referencealt = 100000 * 100;
- int32_t latval, longval, altval;
- u_int32_t templ;
- u_int8_t sizeval, hpval, vpval, versionval;
- char *sizestr, *hpstr, *vpstr;
- versionval = *cp++;
- if (ascii == NULL)
- ascii = tmpbuf;
- if (versionval) {
- (void) sprintf(ascii, "; error: unknown LOC RR version");
- return (ascii);
- }
- sizeval = *cp++;
- hpval = *cp++;
- vpval = *cp++;
- GETLONG(templ, cp);
- latval = (templ - ((unsigned)1<<31));
- GETLONG(templ, cp);
- longval = (templ - ((unsigned)1<<31));
- GETLONG(templ, cp);
- if (templ < referencealt) { /* below WGS 84 spheroid */
- altval = referencealt - templ;
- altsign = "-";
- } else {
- altval = templ - referencealt;
- altsign = "";
- }
- if (latval < 0) {
- northsouth = 'S';
- latval = -latval;
- } else
- northsouth = 'N';
- latsecfrac = latval % 1000;
- latval = latval / 1000;
- latsec = latval % 60;
- latval = latval / 60;
- latmin = latval % 60;
- latval = latval / 60;
- latdeg = latval;
- if (longval < 0) {
- eastwest = 'W';
- longval = -longval;
- } else
- eastwest = 'E';
- longsecfrac = longval % 1000;
- longval = longval / 1000;
- longsec = longval % 60;
- longval = longval / 60;
- longmin = longval % 60;
- longval = longval / 60;
- longdeg = longval;
- altfrac = altval % 100;
- altmeters = (altval / 100);
- sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
- hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
- vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
- sprintf(ascii,
- "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
- latdeg, latmin, latsec, latsecfrac, northsouth,
- longdeg, longmin, longsec, longsecfrac, eastwest,
- altsign, altmeters, altfrac,
- (sizestr != NULL) ? sizestr : error,
- (hpstr != NULL) ? hpstr : error,
- (vpstr != NULL) ? vpstr : error);
- if (sizestr != NULL)
- free(sizestr);
- if (hpstr != NULL)
- free(hpstr);
- if (vpstr != NULL)
- free(vpstr);
- return (ascii);
- }
- /* Return the number of DNS hierarchy levels in the name. */
- int
- dn_count_labels(const char *name) {
- size_t len, i, count;
- len = strlen(name);
- for (i = 0, count = 0; i < len; i++) {
- /* XXX need to check for \. or use named's nlabels(). */
- if (name[i] == '.')
- count++;
- }
- /* don't count initial wildcard */
- if (name[0] == '*')
- if (count)
- count--;
- /* don't count the null label for root. */
- /* if terminating '.' not found, must adjust */
- /* count to include last label */
- if (len > 0 && name[len-1] != '.')
- count++;
- _DIAGASSERT(__type_fit(int, count));
- return (int)count;
- }
- /*
- * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
- * SIG records are required to be printed like this, by the Secure DNS RFC.
- */
- char *
- p_secstodate (u_long secs) {
- /* XXX nonreentrant */
- static char output[15]; /* YYYYMMDDHHMMSS and null */
- time_t myclock = secs;
- struct tm *mytime;
- #ifdef HAVE_TIME_R
- struct tm res;
- mytime = gmtime_r(&myclock, &res);
- #else
- mytime = gmtime(&myclock);
- #endif
- mytime->tm_year += 1900;
- mytime->tm_mon += 1;
- sprintf(output, "%04d%02d%02d%02d%02d%02d",
- mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
- mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
- return (output);
- }
- u_int16_t
- res_nametoclass(const char *buf, int *successp) {
- unsigned long result;
- char *endptr;
- int success;
- result = sym_ston(__p_class_syms, buf, &success);
- if (success)
- goto done;
- if (strncasecmp(buf, "CLASS", 5) != 0 ||
- !isdigit((unsigned char)buf[5]))
- goto done;
- errno = 0;
- result = strtoul(buf + 5, &endptr, 10);
- if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
- success = 1;
- done:
- if (successp)
- *successp = success;
- return (u_int16_t)(result);
- }
- u_int16_t
- res_nametotype(const char *buf, int *successp) {
- unsigned long result;
- char *endptr;
- int success;
- result = sym_ston(__p_type_syms, buf, &success);
- if (success)
- goto done;
- if (strncasecmp(buf, "type", 4) != 0 ||
- !isdigit((unsigned char)buf[4]))
- goto done;
- errno = 0;
- result = strtoul(buf + 4, &endptr, 10);
- if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
- success = 1;
- done:
- if (successp)
- *successp = success;
- return (u_int16_t)(result);
- }