home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (c) 1985,1989 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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)debug.c 5.26 (Berkeley) 3/21/91";
- #endif /* not lint */
-
- /*
- *******************************************************************************
- *
- * debug.c --
- *
- * Routines to print out packets received from a name server query.
- *
- * Modified version of 4.3BSD BIND res_debug.c 5.30 6/27/90
- *
- *******************************************************************************
- */
-
- #include <sys/param.h>
- #include <netinet/in.h>
- #include <arpa/nameser.h>
- #include <arpa/inet.h>
- #include <resolv.h>
- #include <netdb.h>
- #include <stdio.h>
- #include "res.h"
-
- extern char ctime();
-
- /*
- * Imported from res_debug.c
- */
- extern char *_res_resultcodes[];
- extern char *_res_opcodes[];
-
- /*
- * Used to highlight the start of a record when printing it.
- */
- #define INDENT " -> "
-
-
-
- /*
- * Print the contents of a query.
- * This is intended to be primarily a debugging routine.
- */
-
- Print_query(msg, eom, printHeader)
- char *msg, *eom;
- int printHeader;
- {
- Fprint_query(msg, eom, printHeader,stdout);
- }
-
- Fprint_query(msg, eom, printHeader,file)
- char *msg, *eom;
- int printHeader;
- FILE *file;
- {
- register char *cp;
- register HEADER *hp;
- register int n;
- short class;
- short type;
-
- /*
- * Print header fields.
- */
- hp = (HEADER *)msg;
- cp = msg + sizeof(HEADER);
- if (printHeader || (_res.options & RES_DEBUG2)) {
- fprintf(file," HEADER:\n");
- fprintf(file,"\topcode = %s", _res_opcodes[hp->opcode]);
- fprintf(file,", id = %d", ntohs(hp->id));
- fprintf(file,", rcode = %s\n", _res_resultcodes[hp->rcode]);
- fprintf(file,"\theader flags: ");
- if (hp->qr) {
- fprintf(file," response");
- } else {
- fprintf(file," query");
- }
- if (hp->aa)
- fprintf(file,", auth. answer");
- if (hp->tc)
- fprintf(file,", truncation");
- if (hp->rd)
- fprintf(file,", want recursion");
- if (hp->ra)
- fprintf(file,", recursion avail.");
- if (hp->pr)
- fprintf(file,", primary");
- fprintf(file,"\n\tquestions = %d", ntohs(hp->qdcount));
- fprintf(file,", answers = %d", ntohs(hp->ancount));
- fprintf(file,", authority records = %d", ntohs(hp->nscount));
- fprintf(file,", additional = %d\n\n", ntohs(hp->arcount));
- }
-
- /*
- * Print question records.
- */
- if (n = ntohs(hp->qdcount)) {
- fprintf(file," QUESTIONS:\n");
- while (--n >= 0) {
- fprintf(file,"\t");
- cp = Print_cdname(cp, msg, eom, file);
- if (cp == NULL)
- return;
- type = _getshort(cp);
- cp += sizeof(u_short);
- class = _getshort(cp);
- cp += sizeof(u_short);
- fprintf(file,", type = %s", p_type(type));
- fprintf(file,", class = %s\n", p_class(class));
- }
- }
- /*
- * Print authoritative answer records
- */
- if (n = ntohs(hp->ancount)) {
- fprintf(file," ANSWERS:\n");
- while (--n >= 0) {
- fprintf(file, INDENT);
- cp = Print_rr(cp, msg, eom, file);
- if (cp == NULL)
- return;
- }
- }
- /*
- * print name server records
- */
- if (n = ntohs(hp->nscount)) {
- fprintf(file," AUTHORITY RECORDS:\n");
- while (--n >= 0) {
- fprintf(file, INDENT);
- cp = Print_rr(cp, msg, eom, file);
- if (cp == NULL)
- return;
- }
- }
- /*
- * print additional records
- */
- if (n = ntohs(hp->arcount)) {
- fprintf(file," ADDITIONAL RECORDS:\n");
- while (--n >= 0) {
- fprintf(file, INDENT);
- cp = Print_rr(cp, msg, eom, file);
- if (cp == NULL)
- return;
- }
- }
- fprintf(file,"\n------------\n");
- }
-
-
- char *
- Print_cdname_sub(cp, msg, eom, file, format)
- u_char *cp, *msg, *eom;
- FILE *file;
- int format;
- {
- int n;
- u_char name[MAXDNAME];
- extern char *strcpy();
-
- if ((n = dn_expand(msg, eom, cp, name, sizeof(name))) < 0)
- return (NULL);
- if (name[0] == '\0') {
- (void) strcpy(name, "(root)");
- }
- if (format) {
- fprintf(file, "%-30s", name);
- } else {
- fputs((char *)name, file);
- }
- return ((char *)cp + n);
- }
-
- char *
- Print_cdname(cp, msg, eom, file)
- char *cp, *msg, *eom;
- FILE *file;
- {
- return(Print_cdname_sub(cp, msg, eom, file, 0));
- }
-
- char *
- Print_cdname2(cp, msg, eom, file)
- char *cp, *msg, *eom;
- FILE *file;
- {
- return(Print_cdname_sub(cp, msg, eom, file, 1));
- }
-
- /*
- * Print resource record fields in human readable form.
- */
- char *
- Print_rr(cp, msg, eom, file)
- char *cp, *msg, *eom;
- FILE *file;
- {
- int type, class, dlen, n, c;
- unsigned long rrttl, ttl;
- struct in_addr inaddr;
- char *cp1, *cp2;
- int debug;
-
- if ((cp = Print_cdname(cp, msg, eom, file)) == NULL) {
- fprintf(file, "(name truncated?)\n");
- return (NULL); /* compression error */
- }
-
- type = _getshort(cp);
- cp += sizeof(u_short);
- class = _getshort(cp);
- cp += sizeof(u_short);
- rrttl = _getlong(cp);
- cp += sizeof(u_long);
- dlen = _getshort(cp);
- cp += sizeof(u_short);
-
- debug = _res.options & (RES_DEBUG|RES_DEBUG2);
- if (debug) {
- if (_res.options & RES_DEBUG2) {
- fprintf(file,"\n\ttype = %s, class = %s, dlen = %d",
- p_type(type), p_class(class), dlen);
- }
- if (type == T_SOA) {
- fprintf(file,"\n\tttl = %lu (%s)", rrttl, p_time(rrttl));
- }
- (void) putc('\n', file);
- }
-
- cp1 = cp;
-
- /*
- * 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,"\tinternet address = %s\n",
- inet_ntoa(inaddr));
- cp += dlen;
- } else if (dlen == 7) {
- fprintf(file,"\tinternet address = %s",
- inet_ntoa(inaddr));
- fprintf(file,", protocol = %d", cp[4]);
- fprintf(file,", port = %d\n",
- (cp[5] << 8) + cp[6]);
- cp += dlen;
- }
- break;
- default:
- fprintf(file,"\taddress, class = %d, len = %d\n",
- class, dlen);
- cp += dlen;
- }
- break;
-
- case T_CNAME:
- fprintf(file,"\tcanonical name = ");
- goto doname;
-
- case T_MG:
- fprintf(file,"\tmail group member = ");
- goto doname;
- case T_MB:
- fprintf(file,"\tmail box = ");
- goto doname;
- case T_MR:
- fprintf(file,"\tmailbox rename = ");
- goto doname;
- case T_MX:
- fprintf(file,"\tpreference = %u",_getshort(cp));
- cp += sizeof(u_short);
- fprintf(file,", mail exchanger = ");
- goto doname;
- case T_NS:
- fprintf(file,"\tnameserver = ");
- goto doname;
- case T_PTR:
- fprintf(file,"\tname = ");
- doname:
- cp = Print_cdname(cp, msg, eom, file);
- (void) putc('\n', file);
- break;
-
- case T_HINFO:
- if (n = *cp++) {
- fprintf(file,"\tCPU = %.*s", n, cp);
- cp += n;
- }
- if (n = *cp++) {
- fprintf(file,"\tOS = %.*s\n", n, cp);
- cp += n;
- }
- break;
-
- case T_SOA:
- if (!debug)
- (void) putc('\n', file);
- fprintf(file,"\torigin = ");
- cp = Print_cdname(cp, msg, eom, file);
- fprintf(file,"\n\tmail addr = ");
- cp = Print_cdname(cp, msg, eom, file);
- fprintf(file,"\n\tserial = %lu", _getlong(cp));
- cp += sizeof(u_long);
- ttl = _getlong(cp);
- fprintf(file,"\n\trefresh = %lu (%s)", ttl, p_time(ttl));
- cp += sizeof(u_long);
- ttl = _getlong(cp);
- fprintf(file,"\n\tretry = %lu (%s)", ttl, p_time(ttl));
- cp += sizeof(u_long);
- ttl = _getlong(cp);
- fprintf(file,"\n\texpire = %lu (%s)", ttl, p_time(ttl));
- cp += sizeof(u_long);
- ttl = _getlong(cp);
- fprintf(file,
- "\n\tminimum ttl = %lu (%s)\n", ttl, p_time(ttl));
- cp += sizeof(u_long);
- break;
-
- case T_MINFO:
- if (!debug)
- (void) putc('\n', file);
- fprintf(file,"\trequests = ");
- cp = Print_cdname(cp, msg, eom, file);
- fprintf(file,"\n\terrors = ");
- cp = Print_cdname(cp, msg, eom, file);
- (void) putc('\n', file);
- break;
-
- case T_TXT:
- (void) fputs("\ttext = \"", 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);
- }
- }
- (void) fputs("\"\n", file);
- break;
-
- case T_UINFO:
- fprintf(file,"\tuser info = %s\n", cp);
- cp += dlen;
- break;
-
- case T_UID:
- case T_GID:
- if (dlen == 4) {
- fprintf(file,"\t%cid = %lu\n",type == T_UID ? 'u' : 'g',
- _getlong(cp));
- cp += sizeof(int);
- } else {
- fprintf(file,"\t%cid of length %d?\n",
- type == T_UID ? 'u' : 'g', dlen);
- cp += dlen;
- }
- break;
-
- case T_WKS: {
- struct protoent *protoPtr;
-
- if (dlen < sizeof(u_long) + 1)
- break;
- if (!debug)
- (void) putc('\n', file);
- bcopy(cp, (char *)&inaddr, sizeof(inaddr));
- cp += sizeof(u_long);
- if ((protoPtr = getprotobynumber(*cp)) != NULL) {
- fprintf(file,"\tinet address = %s, protocol = %s\n\t",
- inet_ntoa(inaddr), protoPtr->p_name);
- } else {
- fprintf(file,"\tinet address = %s, protocol = %d\n\t",
- inet_ntoa(inaddr), *cp);
- }
- cp++;
- n = 0;
- while (cp < cp1 + dlen) {
- c = *cp++;
- do {
- struct servent *s;
-
- if (c & 0200) {
- s = getservbyport((int)htons(n),
- protoPtr ? protoPtr->p_name : NULL);
- if (s != NULL) {
- fprintf(file," %s", s->s_name);
- } else {
- fprintf(file," #%d", n);
- }
- }
- c <<= 1;
- } while (++n & 07);
- }
- putc('\n',file);
- }
- break;
-
- case T_NULL:
- fprintf(file, "\tNULL (dlen %d)\n", dlen);
- cp += dlen;
- break;
-
- default:
- fprintf(file,"\t??? unknown type %d ???\n", type);
- cp += dlen;
- }
- if (_res.options & RES_DEBUG && type != T_SOA) {
- fprintf(file,"\tttl = %lu (%s)\n", rrttl, p_time(rrttl));
- }
- if (cp != cp1 + dlen) {
- fprintf(file,
- "\n*** Error: record size incorrect (%d != %d)\n\n",
- cp - cp1, dlen);
- cp = NULL;
- }
- return (cp);
- }
-