/* * ++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. 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. * - * --Copyright-- */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93"; static char rcsid[] = "$Id$"; #endif /* LIBC_SCCS and not lint */ #include #include #include #include #include #include #include #include #include #if defined(BSD) && (BSD >= 199103) && defined(AF_INET6) # include #else # include "../conf/portability.h" #endif #if defined(USE_OPTIONS_H) # include "../conf/options.h" #endif extern const char *_res_opcodes[]; extern const char *_res_resultcodes[]; /* XXX: we should use getservbyport() instead. */ static const char * dewks(wks) 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) sprintf(nbuf, "%d", wks); return (nbuf); } } /* XXX: we should use getprotobynumber() instead. */ static const char * deproto(protonum) 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) sprintf(nbuf, "%d", protonum); return (nbuf); } } static const u_char * do_rrset(msg, len, cp, cnt, pflag, file, hs) int cnt, pflag, len; const u_char *cp, *msg; const char *hs; FILE *file; { int n; int sflag; /* * Print answer records. */ sflag = (_res.pfcode & pflag); if (n = ntohs(cnt)) { if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1))) fprintf(file, hs); while (--n >= 0) { if ((!_res.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 ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1))) putc('\n', file); } return (cp); } void __p_query(msg) const u_char *msg; { __fp_query(msg, stdout); } #ifdef ultrix /* ultrix 4.0's packaging has some icky packaging. alias for it here. * there is more junk of this kind over in res_comp.c. */ void p_query(msg) const u_char *msg; { __p_query(msg); } #endif /* * Print the current options. * This is intended to be primarily a debugging routine. */ void __fp_resstat(statp, file) struct __res_state *statp; FILE *file; { register 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(msg, len, file) const u_char *msg; int len; FILE *file; { register const u_char *cp, *endMark; register const HEADER *hp; register int n; if ((_res.options & RES_INIT) == 0 && res_init() == -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 = cp + len; if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || hp->rcode) { fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %d", _res_opcodes[hp->opcode], _res_resultcodes[hp->rcode], ntohs(hp->id)); putc('\n', file); } if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX)) putc(';', file); if ((!_res.pfcode) || (_res.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 ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD1)) { fprintf(file, "; Ques: %d", ntohs(hp->qdcount)); fprintf(file, ", Ans: %d", ntohs(hp->ancount)); fprintf(file, ", Auth: %d", ntohs(hp->nscount)); fprintf(file, ", Addit: %d", ntohs(hp->arcount)); } if ((!_res.pfcode) || (_res.pfcode & (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) { putc('\n',file); } /* * Print question records. */ if (n = ntohs(hp->qdcount)) { if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES)) fprintf(file, ";; QUESTIONS:\n"); while (--n >= 0) { if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES)) fprintf(file, ";;\t"); TruncTest(cp); if ((!_res.pfcode) || (_res.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 ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES)) fprintf(file, ", type = %s", __p_type(_getshort((u_char*)cp))); cp += INT16SZ; TruncTest(cp); if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES)) fprintf(file, ", class = %s\n", __p_class(_getshort((u_char*)cp))); cp += INT16SZ; if ((!_res.pfcode) || (_res.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(msg, file) const u_char *msg; FILE *file; { fp_nquery(msg, PACKETSZ, file); } const u_char * __p_cdnname(cp, msg, len, file) const u_char *cp, *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(cp, msg, file) const u_char *cp, *msg; FILE *file; { return (p_cdnname(cp, msg, PACKETSZ, file)); } /* XXX: the rest of these functions need to become length-limited, too. (vix) */ const u_char * __p_fqname(cp, msg, file) const u_char *cp, *msg; FILE *file; { char name[MAXDNAME]; int n; if ((n = dn_expand(msg, cp + MAXCDNAME, cp, name, sizeof name)) < 0) return (NULL); if (name[0] == '\0') { putc('.', file); } else { fputs(name, file); if (name[strlen(name) - 1] != '.') putc('.', file); } return (cp + n); } /* * Print resource record fields in human readable form. */ const u_char * __p_rr(cp, msg, file) const u_char *cp, *msg; FILE *file; { int type, class, dlen, n, c; struct in_addr inaddr; const u_char *cp1, *cp2; u_int32_t tmpttl, t; int lcnt; if ((_res.options & RES_INIT) == 0 && res_init() == -1) { h_errno = NETDB_INTERNAL; return (NULL); } if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); /* compression error */ 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 ((!_res.pfcode) || (_res.pfcode & RES_PRF_TTLID)) fprintf(file, "\t%lu", (u_long)tmpttl); if ((!_res.pfcode) || (_res.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; u_short 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 %d, port %d", 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: (void) fputs("\t\"", file); cp2 = cp + dlen; 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%d ", _getshort((u_char*)cp)); cp += INT16SZ; if ((cp = p_fqname(cp, msg, file)) == NULL) return (NULL); break; case T_PX: fprintf(file, "\t%d ", _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_TXT: case T_X25: (void) fputs("\t\"", file); cp2 = cp1 + dlen; while (cp < cp2) { 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); 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\n", inet_ntop(AF_INET6, cp, t, sizeof t)); 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; #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 %d, dlen was %d)\n", cp - cp1, dlen); cp = NULL; } return (cp); } /* * Return a string for the type */ const char * __p_type(type) int type; { static char nbuf[20]; switch (type) { case T_A: return "A"; case T_NS: return "NS"; case T_CNAME: return "CNAME"; case T_SOA: return "SOA"; case T_MB: return "MB"; case T_MG: return "MG"; case T_MR: return "MR"; case T_NULL: return "NULL"; case T_WKS: return "WKS"; case T_PTR: return "PTR"; case T_HINFO: return "HINFO"; case T_MINFO: return "MINFO"; case T_MX: return "MX"; case T_TXT: return "TXT"; case T_RP: return "RP"; case T_AFSDB: return "AFSDB"; case T_X25: return "X25"; case T_ISDN: return "ISDN"; case T_RT: return "RT"; case T_NSAP: return "NSAP"; case T_NSAP_PTR: return "NSAP_PTR"; case T_SIG: return "SIG"; case T_KEY: return "KEY"; case T_PX: return "PX"; case T_GPOS: return "GPOS"; case T_AAAA: return "AAAA"; case T_LOC: return "LOC"; case T_AXFR: return "AXFR"; case T_MAILB: return "MAILB"; case T_MAILA: return "MAILA"; case T_ANY: return "ANY"; case T_UINFO: return "UINFO"; case T_UID: return "UID"; case T_GID: return "GID"; #ifdef ALLOW_T_UNSPEC case T_UNSPEC: return "UNSPEC"; #endif /* ALLOW_T_UNSPEC */ default: (void)sprintf(nbuf, "%d", type); return (nbuf); } } /* * Return a mnemonic for class */ const char * __p_class(class) int class; { static char nbuf[20]; switch (class) { case C_IN: return "IN"; case C_HS: return "HS"; case C_ANY: return "ANY"; default: (void)sprintf(nbuf, "%d", class); return (nbuf); } } /* * Return a mnemonic for an option */ const char * __p_option(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"; default: sprintf(nbuf, "?0x%lx?", (u_long)option); return (nbuf); } } /* * Return a mnemonic for a time to live */ char * __p_time(value) u_int32_t value; { static char nbuf[40]; int secs, mins, hours, days; register char *p; if (value == 0) { strcpy(nbuf, "0 secs"); 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; if (days) { (void)sprintf(p, "%d day%s", PLURALIZE(days)); while (*++p); } if (hours) { if (days) *p++ = ' '; (void)sprintf(p, "%d hour%s", PLURALIZE(hours)); while (*++p); } if (mins) { if (days || hours) *p++ = ' '; (void)sprintf(p, "%d min%s", PLURALIZE(mins)); while (*++p); } if (secs || ! (days || hours || mins)) { if (days || hours || mins) *p++ = ' '; (void)sprintf(p, "%d sec%s", PLURALIZE(secs)); } return (nbuf); }