/* $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 #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 #include #include #include #include #include #include #include #include #include #include "resolv_private.h" #include #include #include #include #include #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); }