/* $OpenBSD: res_debug.c,v 1.22 2007/10/11 18:36:41 jakob Exp $ */ /* * ++Copyright++ 1985, 1990, 1993 * - * Copyright (c) 1985, 1990, 1993 * 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. 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. * --Copyright-- */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "thread_private.h" extern const char *_res_opcodes[]; extern const char *_res_resultcodes[]; static const char *loc_ntoal(const u_char *binary, char *ascii, int ascii_len); /* XXX: we should use getservbyport() instead. */ static const char * dewks(int wks) { static char nbuf[20]; switch (wks) { case 5: return "rje"; case 7: return "echo"; case 9: return "discard"; case 11: return "systat"; case 13: return "daytime"; case 15: return "netstat"; case 17: return "qotd"; case 19: return "chargen"; case 20: return "ftp-data"; case 21: return "ftp"; case 23: return "telnet"; case 25: return "smtp"; case 37: return "time"; case 39: return "rlp"; case 42: return "name"; case 43: return "whois"; case 53: return "domain"; case 57: return "apts"; case 59: return "apfs"; case 67: return "bootps"; case 68: return "bootpc"; case 69: return "tftp"; case 77: return "rje"; case 79: return "finger"; case 87: return "link"; case 95: return "supdup"; case 100: return "newacct"; case 101: return "hostnames"; case 102: return "iso-tsap"; case 103: return "x400"; case 104: return "x400-snd"; case 105: return "csnet-ns"; case 109: return "pop-2"; case 111: return "sunrpc"; case 113: return "auth"; case 115: return "sftp"; case 117: return "uucp-path"; case 119: return "nntp"; case 121: return "erpc"; case 123: return "ntp"; case 133: return "statsrv"; case 136: return "profile"; case 144: return "NeWS"; case 161: return "snmp"; case 162: return "snmp-trap"; case 170: return "print-srv"; default: (void) snprintf(nbuf, sizeof nbuf, "%d", wks); return (nbuf); } } /* XXX: we should use getprotobynumber() instead. */ static const char * deproto(int protonum) { static char nbuf[20]; switch (protonum) { case 1: return "icmp"; case 2: return "igmp"; case 3: return "ggp"; case 5: return "st"; case 6: return "tcp"; case 7: return "ucl"; case 8: return "egp"; case 9: return "igp"; case 11: return "nvp-II"; case 12: return "pup"; case 16: return "chaos"; case 17: return "udp"; default: (void) snprintf(nbuf, sizeof nbuf, "%d", protonum); return (nbuf); } } static const u_char * do_rrset(const u_char *msg, int len, const u_char *cp, int cnt, int pflag, FILE *file, const char *hs) { struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res); int n; int sflag; /* * Print answer records. */ sflag = (_resp->pfcode & pflag); if ((n = ntohs(cnt))) { if ((!_resp->pfcode) || ((sflag) && (_resp->pfcode & RES_PRF_HEAD1))) fprintf(file, "%s", hs); while (--n >= 0) { if ((!_resp->pfcode) || sflag) { cp = p_rr(cp, msg, file); } else { unsigned int dlen; cp += __dn_skipname(cp, cp + MAXCDNAME); cp += INT16SZ; cp += INT16SZ; cp += INT32SZ; dlen = _getshort((u_char*)cp); cp += INT16SZ; cp += dlen; } if ((cp - msg) > len) return (NULL); } if ((!_resp->pfcode) || ((sflag) && (_resp->pfcode & RES_PRF_HEAD1))) putc('\n', file); } return (cp); } void __p_query(const u_char *msg) { __fp_query(msg, stdout); } /* * Print the current options. * This is intended to be primarily a debugging routine. */ void __fp_resstat(struct __res_state *statp, FILE *file) { u_long mask; fprintf(file, ";; res options:"); if (!statp) statp = &_res; for (mask = 1; mask != 0; mask <<= 1) if (statp->options & mask) fprintf(file, " %s", p_option(mask)); putc('\n', file); } /* * Print the contents of a query. * This is intended to be primarily a debugging routine. */ void __fp_nquery(const u_char *msg, int len, FILE *file) { struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res); const u_char *cp, *endMark; const HEADER *hp; int n; if (_res_init(0) == -1) return; #define TruncTest(x) if (x > endMark) goto trunc #define ErrorTest(x) if (x == NULL) goto error /* * Print header fields. */ hp = (HEADER *)msg; cp = msg + HFIXEDSZ; endMark = msg + len; if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_HEADX) || hp->rcode) { fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %u", _res_opcodes[hp->opcode], _res_resultcodes[hp->rcode], ntohs(hp->id)); putc('\n', file); } if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_HEADX)) putc(';', file); if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_HEAD2)) { fprintf(file, "; flags:"); if (hp->qr) fprintf(file, " qr"); if (hp->aa) fprintf(file, " aa"); if (hp->tc) fprintf(file, " tc"); if (hp->rd) fprintf(file, " rd"); if (hp->ra) fprintf(file, " ra"); if (hp->unused) fprintf(file, " UNUSED-BIT-ON"); if (hp->ad) fprintf(file, " ad"); if (hp->cd) fprintf(file, " cd"); } if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_HEAD1)) { fprintf(file, "; Ques: %u", ntohs(hp->qdcount)); fprintf(file, ", Ans: %u", ntohs(hp->ancount)); fprintf(file, ", Auth: %u", ntohs(hp->nscount)); fprintf(file, ", Addit: %u", ntohs(hp->arcount)); } if ((!_resp->pfcode) || (_resp->pfcode & (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { putc('\n',file); } /* * Print question records. */ if ((n = ntohs(hp->qdcount))) { if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) fprintf(file, ";; QUESTIONS:\n"); while (--n >= 0) { if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) fprintf(file, ";;\t"); TruncTest(cp); if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) cp = p_cdnname(cp, msg, len, file); else { int n; char name[MAXDNAME]; if ((n = dn_expand(msg, msg+len, cp, name, sizeof name)) < 0) cp = NULL; else cp += n; } ErrorTest(cp); TruncTest(cp); if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) fprintf(file, ", type = %s", __p_type(_getshort((u_char*)cp))); cp += INT16SZ; TruncTest(cp); if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) fprintf(file, ", class = %s\n", __p_class(_getshort((u_char*)cp))); cp += INT16SZ; if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_QUES)) putc('\n', file); } } /* * Print authoritative answer records */ TruncTest(cp); cp = do_rrset(msg, len, cp, hp->ancount, RES_PRF_ANS, file, ";; ANSWERS:\n"); ErrorTest(cp); /* * print name server records */ TruncTest(cp); cp = do_rrset(msg, len, cp, hp->nscount, RES_PRF_AUTH, file, ";; AUTHORITY RECORDS:\n"); ErrorTest(cp); TruncTest(cp); /* * print additional records */ cp = do_rrset(msg, len, cp, hp->arcount, RES_PRF_ADD, file, ";; ADDITIONAL RECORDS:\n"); ErrorTest(cp); return; trunc: fprintf(file, "\n;; ...truncated\n"); return; error: fprintf(file, "\n;; ...malformed\n"); } void __fp_query(const u_char *msg, FILE *file) { fp_nquery(msg, PACKETSZ, 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, 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, newlen; if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0) return (NULL); newlen = strlen(name); if (newlen == 0 || name[newlen - 1] != '.') { if (newlen + 1 >= namelen) /* Lack space for final dot */ return (NULL); else strlcpy(name + newlen, ".", namelen - newlen); } return (cp + n); } /* XXX: the rest of these functions need to become length-limited, too. (vix) */ 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, sizeof name); if (n == NULL) return (NULL); fputs(name, file); return (n); } /* * Print resource record fields in human readable form. */ const u_char * __p_rr(const u_char *cp, const u_char *msg, FILE *file) { struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res); int type, class, dlen, n, c; struct in_addr inaddr; const u_char *cp1, *cp2; u_int32_t tmpttl, t; int lcnt; u_int16_t keyflags; char rrname[MAXDNAME]; /* The fqdn of this RR */ char base64_key[MAX_KEY_BASE64]; if (_res_init(0) == -1) { h_errno = NETDB_INTERNAL; return (NULL); } cp = __p_fqnname(cp, msg, MAXCDNAME, rrname, sizeof rrname); if (!cp) return (NULL); /* compression error */ fputs(rrname, file); type = _getshort((u_char*)cp); cp += INT16SZ; class = _getshort((u_char*)cp); cp += INT16SZ; tmpttl = _getlong((u_char*)cp); cp += INT32SZ; dlen = _getshort((u_char*)cp); cp += INT16SZ; cp1 = cp; if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_TTLID)) fprintf(file, "\t%lu", (u_long)tmpttl); if ((!_resp->pfcode) || (_resp->pfcode & RES_PRF_CLASS)) fprintf(file, "\t%s", __p_class(class)); fprintf(file, "\t%s", __p_type(type)); /* * Print type specific data, if appropriate */ switch (type) { case T_A: switch (class) { case C_IN: case C_HS: bcopy(cp, (char *)&inaddr, INADDRSZ); if (dlen == 4) { fprintf(file, "\t%s", inet_ntoa(inaddr)); cp += dlen; } else if (dlen == 7) { char *address; u_char protocol; in_port_t port; address = inet_ntoa(inaddr); cp += INADDRSZ; protocol = *(u_char*)cp; cp += sizeof (u_char); port = _getshort((u_char*)cp); cp += INT16SZ; fprintf(file, "\t%s\t; proto %u, port %u", address, protocol, port); } break; default: cp += dlen; } break; case T_CNAME: case T_MB: case T_MG: case T_MR: case T_NS: case T_PTR: putc('\t', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; case T_HINFO: case T_ISDN: cp2 = cp + dlen; (void) fputs("\t\"", file); if ((n = (unsigned char) *cp++) != 0) { for (c = n; c > 0 && cp < cp2; c--) { if (strchr("\n\"\\", *cp)) (void) putc('\\', file); (void) putc(*cp++, file); } } putc('"', file); if (cp < cp2 && (n = (unsigned char) *cp++) != 0) { (void) fputs ("\t\"", file); for (c = n; c > 0 && cp < cp2; c--) { if (strchr("\n\"\\", *cp)) (void) putc('\\', file); (void) putc(*cp++, file); } putc('"', file); } else if (type == T_HINFO) { (void) fputs("\"?\"", file); fprintf(file, "\n;; *** Warning *** OS-type missing"); } break; case T_SOA: putc('\t', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); putc(' ', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); fputs(" (\n", file); t = _getlong((u_char*)cp); cp += INT32SZ; fprintf(file, "\t\t\t%lu\t; serial\n", (u_long)t); t = _getlong((u_char*)cp); cp += INT32SZ; fprintf(file, "\t\t\t%lu\t; refresh (%s)\n", (u_long)t, __p_time(t)); t = _getlong((u_char*)cp); cp += INT32SZ; fprintf(file, "\t\t\t%lu\t; retry (%s)\n", (u_long)t, __p_time(t)); t = _getlong((u_char*)cp); cp += INT32SZ; fprintf(file, "\t\t\t%lu\t; expire (%s)\n", (u_long)t, __p_time(t)); t = _getlong((u_char*)cp); cp += INT32SZ; fprintf(file, "\t\t\t%lu )\t; minimum (%s)", (u_long)t, __p_time(t)); break; case T_MX: case T_AFSDB: case T_RT: fprintf(file, "\t%u ", _getshort((u_char*)cp)); cp += INT16SZ; if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; case T_PX: fprintf(file, "\t%u ", _getshort((u_char*)cp)); cp += INT16SZ; if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); putc(' ', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; case T_X25: cp2 = cp + dlen; (void) fputs("\t\"", file); if ((n = (unsigned char) *cp++) != 0) { for (c = n; c > 0 && cp < cp2; c--) { if (strchr("\n\"\\", *cp)) (void) putc('\\', file); (void) putc(*cp++, file); } } putc('"', file); break; case T_TXT: (void) putc('\t', file); cp2 = cp1 + dlen; while (cp < cp2) { putc('"', file); if ((n = (unsigned char) *cp++)) { for (c = n; c > 0 && cp < cp2; c--) { if (strchr("\n\"\\", *cp)) (void) putc('\\', file); (void) putc(*cp++, file); } } putc('"', file); if (cp < cp2) putc(' ', file); } break; case T_NSAP: (void) fprintf(file, "\t%s", inet_nsap_ntoa(dlen, cp, NULL)); cp += dlen; break; case T_AAAA: { char t[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"]; fprintf(file, "\t%s", inet_ntop(AF_INET6, cp, t, sizeof t)); cp += dlen; break; } case T_LOC: { char t[255]; fprintf(file, "\t%s", loc_ntoal(cp, t, sizeof t)); cp += dlen; break; } case T_NAPTR: { u_int order, preference; order = _getshort(cp); cp += INT16SZ; preference = _getshort(cp); cp += INT16SZ; fprintf(file, "\t%u %u ",order, preference); /* Flags */ n = *cp++; fprintf(file,"\"%.*s\" ", (int)n, cp); cp += n; /* Service */ n = *cp++; fprintf(file,"\"%.*s\" ", (int)n, cp); cp += n; /* Regexp */ n = *cp++; fprintf(file,"\"%.*s\" ", (int)n, cp); cp += n; if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; } case T_SRV: { u_int priority, weight, port; priority = _getshort(cp); cp += INT16SZ; weight = _getshort(cp); cp += INT16SZ; port = _getshort(cp); cp += INT16SZ; fprintf(file, "\t%u %u %u ", priority, weight, port); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; } case T_MINFO: case T_RP: putc('\t', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); putc(' ', file); if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; case T_UINFO: putc('\t', file); fputs((char *)cp, file); cp += dlen; break; case T_UID: case T_GID: if (dlen == 4) { fprintf(file, "\t%u", _getlong((u_char*)cp)); cp += INT32SZ; } break; case T_WKS: if (dlen < INT32SZ + 1) break; bcopy(cp, (char *)&inaddr, INADDRSZ); cp += INT32SZ; fprintf(file, "\t%s %s ( ", inet_ntoa(inaddr), deproto((int) *cp)); cp += sizeof (u_char); n = 0; lcnt = 0; while (cp < cp1 + dlen) { c = *cp++; do { if (c & 0200) { if (lcnt == 0) { fputs("\n\t\t\t", file); lcnt = 5; } fputs(dewks(n), file); putc(' ', file); lcnt--; } c <<= 1; } while (++n & 07); } putc(')', file); break; case T_KEY: putc('\t', file); keyflags = _getshort(cp); cp += 2; fprintf(file,"0x%04x", keyflags ); /* flags */ fprintf(file," %u", *cp++); /* protocol */ fprintf(file," %u (", *cp++); /* algorithm */ n = b64_ntop(cp, (cp1 + dlen) - cp, base64_key, sizeof base64_key); for (c = 0; c < n; ++c) { if (0 == (c & 0x3F)) fprintf(file, "\n\t"); putc(base64_key[c], file); /* public key data */ } fprintf(file, " )"); if (n < 0) fprintf(file, "\t; BAD BASE64"); fflush(file); cp = cp1 + dlen; break; case T_SIG: case T_RRSIG: type = _getshort((u_char*)cp); cp += INT16SZ; fprintf(file, " %s", p_type(type)); fprintf(file, "\t%u", *cp++); /* algorithm */ /* Check label value and print error if wrong. */ n = *cp++; c = dn_count_labels (rrname); if (n != c) fprintf(file, "\t; LABELS WRONG (%d should be %d)\n\t", n, c); /* orig ttl */ n = _getlong((u_char*)cp); if (n != tmpttl) fprintf(file, " %u", n); cp += INT32SZ; /* sig expire */ fprintf(file, " (\n\t%s", __p_secstodate(_getlong((u_char*)cp))); cp += INT32SZ; /* time signed */ fprintf(file, " %s", __p_secstodate(_getlong((u_char*)cp))); cp += INT32SZ; /* sig footprint */ fprintf(file," %u ", _getshort((u_char*)cp)); cp += INT16SZ; /* signer's name */ cp = p_fqname(cp, msg, file); n = b64_ntop(cp, (cp1 + dlen) - cp, base64_key, sizeof base64_key); for (c = 0; c < n; c++) { if (0 == (c & 0x3F)) fprintf (file, "\n\t"); putc(base64_key[c], file); /* signature */ } /* Clean up... */ fprintf(file, " )"); if (n < 0) fprintf(file, "\t; BAD BASE64"); fflush(file); cp = cp1+dlen; break; #ifdef ALLOW_T_UNSPEC case T_UNSPEC: { int NumBytes = 8; u_char *DataPtr; int i; if (dlen < NumBytes) NumBytes = dlen; fprintf(file, "\tFirst %d bytes of hex data:", NumBytes); for (i = 0, DataPtr = cp; i < NumBytes; i++, DataPtr++) fprintf(file, " %x", *DataPtr); cp += dlen; } break; #endif /* ALLOW_T_UNSPEC */ default: fprintf(file, "\t?%d?", type); cp += dlen; } #if 0 fprintf(file, "\t; dlen=%d, ttl %s\n", dlen, __p_time(tmpttl)); #else putc('\n', file); #endif if (cp - cp1 != dlen) { fprintf(file, ";; packet size error (found %ld, dlen was %d)\n", (long)(cp - cp1), dlen); cp = NULL; } return (cp); } int __sym_ston(const struct res_sym *syms, 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_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); } } snprintf(unname, sizeof unname, "%d", number); if (success) *success = 0; return (unname); } /* * 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_USE_INET6: return "inet6"; case RES_USE_EDNS0: return "edns0"; default: snprintf(nbuf, sizeof 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]; char *ebuf; int secs, mins, hours, days; char *p; int tmp; if (value == 0) { strlcpy(nbuf, "0 secs", sizeof nbuf); return (nbuf); } secs = value % 60; value /= 60; mins = value % 60; value /= 60; hours = value % 24; value /= 24; days = value; value = 0; #define PLURALIZE(x) x, (x == 1) ? "" : "s" p = nbuf; ebuf = nbuf + sizeof(nbuf); if (days) { if ((tmp = snprintf(p, ebuf - p, "%d day%s", PLURALIZE(days))) >= ebuf - p || tmp < 0) goto full; p += tmp; } if (hours) { if (days) *p++ = ' '; if (p >= ebuf) goto full; if ((tmp = snprintf(p, ebuf - p, "%d hour%s", PLURALIZE(hours))) >= ebuf - p || tmp < 0) goto full; p += tmp; } if (mins) { if (days || hours) *p++ = ' '; if (p >= ebuf) goto full; if ((tmp = snprintf(p, ebuf - p, "%d min%s", PLURALIZE(mins))) >= ebuf - p || tmp < 0) goto full; p += tmp; } if (secs || ! (days || hours || mins)) { if (days || hours || mins) *p++ = ' '; if (p >= ebuf) goto full; if ((tmp = snprintf(p, ebuf - p, "%d sec%s", PLURALIZE(secs))) >= ebuf - p || tmp < 0) goto full; } return (nbuf); full: p = nbuf + sizeof(nbuf) - 4; *p++ = '.'; *p++ = '.'; *p++ = '.'; *p++ = '\0'; return (nbuf); } /* * 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 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_int8_t prec) { static char retbuf[sizeof "90000000.00"]; unsigned long val; int mantissa, exponent; mantissa = (int)((prec >> 4) & 0x0f) % 10; exponent = (int)((prec >> 0) & 0x0f) % 10; val = mantissa * poweroften[exponent]; (void) snprintf(retbuf, sizeof retbuf, "%ld.%.2ld", val/100, val%100); return (retbuf); } /* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */ static u_int8_t precsize_aton(char **strptr) { unsigned int mval = 0, cmval = 0; u_int8_t retval = 0; char *cp; int exponent; int mantissa; cp = *strptr; while (isdigit(*cp)) mval = mval * 10 + (*cp++ - '0'); if (*cp == '.') { /* centimeters */ cp++; if (isdigit(*cp)) { cmval = (*cp++ - '0') * 10; if (isdigit(*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(char **latlonstrptr, int *which) { char *cp; u_int32_t retval; int deg = 0, min = 0, secs = 0, secsfrac = 0; cp = *latlonstrptr; while (isdigit(*cp)) deg = deg * 10 + (*cp++ - '0'); while (isspace(*cp)) cp++; if (!(isdigit(*cp))) goto fndhemi; while (isdigit(*cp)) min = min * 10 + (*cp++ - '0'); while (isspace(*cp)) cp++; if (!(isdigit(*cp))) goto fndhemi; while (isdigit(*cp)) secs = secs * 10 + (*cp++ - '0'); if (*cp == '.') { /* decimal seconds */ cp++; if (isdigit(*cp)) { secsfrac = (*cp++ - '0') * 100; if (isdigit(*cp)) { secsfrac += (*cp++ - '0') * 10; if (isdigit(*cp)) { secsfrac += (*cp++ - '0'); } } } } while (!isspace(*cp)) /* if any trailing garbage */ cp++; while (isspace(*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(*cp)) /* if any trailing garbage */ cp++; while (isspace(*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 *maxcp; u_char *bcp; char *cp; 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 = (char *)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(*cp)) altmeters = altmeters * 10 + (*cp++ - '0'); if (*cp == '.') { /* decimal meters */ cp++; if (isdigit(*cp)) { altfrac = (*cp++ - '0') * 10; if (isdigit(*cp)) { altfrac += (*cp++ - '0'); } } } alt = (10000000 + (altsign * (altmeters * 100 + altfrac))); while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */ cp++; while (isspace(*cp) && (cp < maxcp)) cp++; if (cp >= maxcp) goto defaults; siz = precsize_aton(&cp); while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */ cp++; while (isspace(*cp) && (cp < maxcp)) cp++; if (cp >= maxcp) goto defaults; hp = precsize_aton(&cp); while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */ cp++; while (isspace(*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 */ } const char * loc_ntoa(const u_char *binary, char *ascii) { return loc_ntoal(binary, ascii, 255); } /* takes an on-the-wire LOC RR and formats it in a human readable format. */ static const char * loc_ntoal(const u_char *binary, char *ascii, int ascii_len) { static char *error = "?"; const u_char *cp = binary; int latdeg, latmin, latsec, latsecfrac; int longdeg, longmin, longsec, longsecfrac; char northsouth, eastwest; int altmeters, altfrac, altsign; const int 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 (versionval) { snprintf(ascii, ascii_len, "; 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 = -1; } else { altval = templ - referencealt; altsign = 1; } 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) * altsign; if ((sizestr = strdup(precsize_ntoa(sizeval))) == NULL) sizestr = error; if ((hpstr = strdup(precsize_ntoa(hpval))) == NULL) hpstr = error; if ((vpstr = strdup(precsize_ntoa(vpval))) == NULL) vpstr = error; snprintf(ascii, ascii_len, "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm", latdeg, latmin, latsec, latsecfrac, northsouth, longdeg, longmin, longsec, longsecfrac, eastwest, altmeters, altfrac, sizestr, hpstr, vpstr); if (sizestr != error) free(sizestr); if (hpstr != error) free(hpstr); if (vpstr != error) free(vpstr); return (ascii); } /* Return the number of DNS hierarchy levels in the name. */ int __dn_count_labels(char *name) { int i, len, count; len = strlen(name); for(i = 0, count = 0; i < len; i++) { 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++; return (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 (long unsigned int secs) { static char output[15]; /* YYYYMMDDHHMMSS and null */ time_t clock = secs; struct tm *time; time = gmtime(&clock); time->tm_year += 1900; time->tm_mon += 1; snprintf(output, sizeof output, "%04d%02d%02d%02d%02d%02d", time->tm_year, time->tm_mon, time->tm_mday, time->tm_hour, time->tm_min, time->tm_sec); return (output); }