res_debug.c
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上传日期:2007-01-17
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文件大小:17k
- /* res_debug.c - outputs to the console resolver debug messages */
- /* Copyright 1984-2001 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- * 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.
- */
- /*
- modification history
- --------------------
- 01c,17sep01,vvv fixed compilation warnings
- 01b,29apr97,jag Changed T_NULL to T_NULL_RR to fix conflict with loadCoffLib.h
- 01a,02feb97,jag Changed _p_query to dnsDebug.
- */
- #include <resolvLib.h>
- #include <stdio.h>
- #include <string.h>
- void __fp_query();
- char *__p_class(), *__p_time(), *__p_type();
- char *p_cdname(), *p_fqname(), *p_rr();
- char *_res_opcodes[] = {
- "QUERY",
- "IQUERY",
- "CQUERYM",
- "CQUERYU",
- "4",
- "5",
- "6",
- "7",
- "8",
- "UPDATEA",
- "UPDATED",
- "UPDATEDA",
- "UPDATEM",
- "UPDATEMA",
- "ZONEINIT",
- "ZONEREF",
- };
- char *_res_resultcodes[] = {
- "NOERROR",
- "FORMERR",
- "SERVFAIL",
- "NXDOMAIN",
- "NOTIMP",
- "REFUSED",
- "6",
- "7",
- "8",
- "9",
- "10",
- "11",
- "12",
- "13",
- "14",
- "NOCHANGE",
- };
- static char retbuf[16];
- static char *
- dewks(wks)
- int wks;
- {
- 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(retbuf, "%d", wks); return(retbuf);
- }
- }
- static char *
- deproto(protonum)
- int protonum;
- {
- 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(retbuf, "%d", protonum); return(retbuf);
- }
- }
- static char *
- do_rrset(msg, cp, cnt, pflag, file, hs)
- int cnt, pflag;
- char *cp,*msg, *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) {
- cp = p_rr(cp, msg, file);
- if ((cp-msg) > PACKETSZ)
- return (NULL);
- }
- if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
- putc('n', file);
- }
- return(cp);
- }
- #ifdef ORG_RESOLVER
- __p_query(msg)
- char *msg;
- #else
- void dnsDebug
- (
- char *msg
- )
- #endif /* ORG_RESOLVER */
- {
- __fp_query(msg, stdout);
- }
- #ifdef ORG_RESOLVER
- /*
- * Print the current options.
- * This is intended to be primarily a debugging routine.
- */
- void
- __fp_resstat(statp, file)
- struct __res_state *statp;
- FILE *file;
- {
- int bit;
- fprintf(file, ";; res options:");
- if (!statp)
- statp = &_res;
- for (bit = 0; bit < 32; bit++) { /* XXX 32 - bad assumption! */
- if (statp->options & (1<<bit))
- fprintf(file, " %s", p_option(1<<bit));
- }
- putc('n', file);
- }
- #endif /* ORG_RESOLVER */
- /*
- * Print the contents of a query.
- * This is intended to be primarily a debugging routine.
- */
- void
- __fp_query(msg,file)
- char *msg;
- FILE *file;
- {
- register char *cp;
- register HEADER *hp;
- register int n;
- /*
- * Print header fields.
- */
- hp = (HEADER *)msg;
- cp = msg + sizeof(HEADER);
- 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);
- }
- 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 (hp->pr)
- fprintf(file," pr");
- }
- 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 1
- if ((!_res.pfcode) || (_res.pfcode &
- (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
- putc('n',file);
- }
- #endif
- /*
- * Print question records.
- */
- if ((n = ntohs(hp->qdcount))) {
- if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
- fprintf(file,";; QUESTIONS:n");
- while (--n >= 0) {
- fprintf(file,";;t");
- cp = p_cdname(cp, msg, file);
- if (cp == NULL)
- return;
- if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
- fprintf(file, ", type = %s",
- __p_type(_getshort(cp)));
- cp += sizeof(uint16_t);
- if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
- fprintf(file, ", class = %sn",
- __p_class(_getshort(cp)));
- cp += sizeof(uint16_t);
- putc('n', file);
- }
- }
- /*
- * Print authoritative answer records
- */
- cp = do_rrset(msg, cp, hp->ancount, RES_PRF_ANS, file,
- ";; ANSWERS:n");
- if (cp == NULL)
- return;
- /*
- * print name server records
- */
- cp = do_rrset(msg, cp, hp->nscount, RES_PRF_AUTH, file,
- ";; AUTHORITY RECORDS:n");
- if (!cp)
- return;
- /*
- * print additional records
- */
- cp = do_rrset(msg, cp, hp->arcount, RES_PRF_ADD, file,
- ";; ADDITIONAL RECORDS:n");
- if (!cp)
- return;
- }
- char *
- p_cdname(cp, msg, file)
- char *cp, *msg;
- FILE *file;
- {
- char name[MAXDNAME];
- int n;
- if ((n = resolvDNExpand((u_char *)msg, (u_char *)cp + MAXCDNAME,
- (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
- return (NULL);
- if (name[0] == ' ')
- putc('.', file);
- else
- fputs(name, file);
- return (cp + n);
- }
- char *
- p_fqname(cp, msg, file)
- char *cp, *msg;
- FILE *file;
- {
- char name[MAXDNAME];
- int n;
- if ((n = resolvDNExpand((u_char *)msg, (u_char *)cp + MAXCDNAME,
- (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
- return (NULL);
- if (name[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.
- */
- char *
- p_rr(cp, msg, file)
- char *cp, *msg;
- FILE *file;
- {
- int type, class, dlen, n, c;
- struct in_addr inaddr;
- char *cp1, *cp2;
- uint32_t tmpttl, t;
- int lcnt;
- if ((cp = p_fqname(cp, msg, file)) == NULL)
- return (NULL); /* compression error */
- type = _getshort(cp);
- cp += sizeof(uint16_t);
- class = _getshort(cp);
- cp += sizeof(uint16_t);
- tmpttl = _getlong(cp);
- cp += sizeof(uint32_t);
- dlen = _getshort(cp);
- cp += sizeof(uint16_t);
- cp1 = cp;
- if ((!_res.pfcode) || (_res.pfcode & RES_PRF_TTLID))
- fprintf(file, "t%lu", 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, sizeof(inaddr));
- 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 += sizeof(inaddr);
- protocol = *(u_char*)cp;
- cp += sizeof(u_char);
- port = _getshort(cp);
- cp += sizeof(uint16_t);
- fprintf(file, "t%st; 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);
- cp = p_fqname(cp, msg, file);
- break;
- case T_HINFO:
- if ((n = *cp++)) {
- fprintf(file,"t%.*s", n, cp);
- cp += n;
- }
- if ((n = *cp++)) {
- fprintf(file,"t%.*s", n, cp);
- cp += n;
- }
- break;
- case T_SOA:
- putc('t', file);
- cp = p_fqname(cp, msg, file); /* origin */
- putc(' ', file);
- cp = p_fqname(cp, msg, file); /* mail addr */
- fputs(" (n", file);
- t = _getlong(cp); cp += sizeof(uint32_t);
- fprintf(file,"ttt%lut; serialn", t);
- t = _getlong(cp); cp += sizeof(uint32_t);
- fprintf(file,"ttt%lut; refresh (%s)n", t, __p_time(t));
- t = _getlong(cp); cp += sizeof(uint32_t);
- fprintf(file,"ttt%lut; retry (%s)n", t, __p_time(t));
- t = _getlong(cp); cp += sizeof(uint32_t);
- fprintf(file,"ttt%lut; expire (%s)n", t, __p_time(t));
- t = _getlong(cp); cp += sizeof(uint32_t);
- fprintf(file,"ttt%lu )t; minimum (%s)", t, __p_time(t));
- break;
- case T_MX:
- case T_AFSDB:
- fprintf(file,"t%d ", _getshort(cp));
- cp += sizeof(uint16_t);
- cp = p_fqname(cp, msg, file);
- break;
- case T_TXT:
- (void) fputs("t"", file);
- cp2 = cp1 + dlen;
- while (cp < cp2) {
- if ((n = (unsigned char) *cp++)) {
- for (c = n; c > 0 && cp < cp2; c--)
- if (*cp == 'n') {
- (void) putc('\', file);
- (void) putc(*cp++, file);
- } else
- (void) putc(*cp++, file);
- }
- }
- putc('"', file);
- break;
- case T_MINFO:
- case T_RP:
- putc('t', file);
- cp = p_fqname(cp, msg, file);
- putc(' ', file);
- cp = p_fqname(cp, msg, file);
- break;
- case T_UINFO:
- putc('t', file);
- fputs(cp, file);
- cp += dlen;
- break;
- case T_UID:
- case T_GID:
- if (dlen == 4) {
- fprintf(file,"t%lu", _getlong(cp));
- cp += sizeof(uint32_t);
- }
- break;
- case T_WKS:
- if (dlen < sizeof(uint32_t) + 1)
- break;
- bcopy(cp, (char *)&inaddr, sizeof(inaddr));
- cp += sizeof(uint32_t);
- 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("nttt", 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;
- 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 %sn", 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);
- }
- static char nbuf[40];
- /*
- * Return a string for the type
- */
- char *
- __p_type(type)
- int type;
- {
- switch (type) {
- case T_A:
- return("A");
- case T_NS: /* authoritative server */
- return("NS");
- case T_CNAME: /* canonical name */
- return("CNAME");
- case T_SOA: /* start of authority zone */
- return("SOA");
- case T_MB: /* mailbox domain name */
- return("MB");
- case T_MG: /* mail group member */
- return("MG");
- case T_MR: /* mail rename name */
- return("MR");
- case T_NULL_RR: /* null resource record */
- return("NULL");
- case T_WKS: /* well known service */
- return("WKS");
- case T_PTR: /* domain name pointer */
- return("PTR");
- case T_HINFO: /* host information */
- return("HINFO");
- case T_MINFO: /* mailbox information */
- return("MINFO");
- case T_MX: /* mail routing info */
- return("MX");
- case T_TXT: /* text */
- return("TXT");
- case T_RP: /* responsible person */
- return("RP");
- case T_AFSDB: /* AFS cell database */
- return("AFSDB");
- case T_AXFR: /* zone transfer */
- return("AXFR");
- case T_MAILB: /* mail box */
- return("MAILB");
- case T_MAILA: /* mail address */
- return("MAILA");
- case T_ANY: /* matches any type */
- 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
- */
- char *
- __p_class(class)
- int class;
- {
- switch (class) {
- case C_IN: /* internet class */
- return("IN");
- case C_HS: /* hesiod class */
- return("HS");
- case C_ANY: /* matches any class */
- return("ANY");
- default:
- (void)sprintf(nbuf, "%d", class);
- return(nbuf);
- }
- }
- /*
- * Return a mnemonic for an option
- */
- #ifdef ORG_RESOLVER /* used only if ORG_RESOLVER defined */
- static char *
- p_option(option)
- u_long option;
- {
- switch (option) {
- case RES_INIT: return "init";
- case RES_DEBUG: return "debug";
- case RES_AAONLY: return "aaonly";
- case RES_USEVC: return "usevc";
- case RES_PRIMARY: return "primry";
- 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";
- default: sprintf(nbuf, "?0x%lx?", option); return nbuf;
- }
- }
- #endif
- /*
- * Return a mnemonic for a time to live
- */
- char *
- __p_time(value)
- uint32_t value;
- {
- 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);
- }