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- /*
- * Copyright (c) 1985 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)debug.c 5.13 (Berkeley) 6/18/88";
- #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 5.6 9/14/85
- *
- *******************************************************************************
- */
-
- #include <sys/types.h>
- #include <netinet/in.h>
- #include <stdio.h>
- #include <arpa/nameser.h>
- #include <resolv.h>
- #include <netdb.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,", auth. 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," NAME SERVERS:\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)
- char *cp, *msg, *eom;
- FILE *file;
- int format;
- {
- int n;
- 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(name, file);
- }
- return (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;
- long ttl;
- struct in_addr inaddr;
- char *cp1;
-
- 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);
- ttl = _getlong(cp);
- cp += sizeof(u_long);
- dlen = _getshort(cp);
- cp += sizeof(u_short);
-
- if (_res.options & RES_DEBUG2) {
- fprintf(file,"\n\ttype = %s, class = %s, ttl = %s, dlen = %d",
- p_type(type), p_class(class), p_time(ttl), dlen);
- fprintf(file,"\n");
- }
-
- cp1 = cp;
-
- /*
- * Print type specific data, if appropriate
- */
- switch (type) {
- case T_A:
- switch (class) {
- case C_IN:
- bcopy(cp, (char *)&inaddr, sizeof(inaddr));
- if (dlen == 4) {
- fprintf(file,"\tinet address = %s\n",
- inet_ntoa(inaddr));
- cp += dlen;
- } else if (dlen == 7) {
- fprintf(file,"\tinet 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);
- }
- break;
-
- case T_CNAME:
- fprintf(file,"\tcanonical name = ");
- goto doname;
-
- case T_MX:
- fprintf(file,"\tpreference = %d",_getshort(cp));
- cp += sizeof(u_short);
- fprintf(file,", mail exchanger = ");
- 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_NS:
- fprintf(file,"\tnameserver = ");
- goto doname;
- case T_PTR:
- fprintf(file,"\thost name = ");
- doname:
- cp = Print_cdname(cp, msg, eom, file);
- fprintf(file,"\n");
- 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:
- 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=%ld", _getlong(cp));
- cp += sizeof(u_long);
- fprintf(file,", refresh=%s", p_time(_getlong(cp)));
- cp += sizeof(u_long);
- fprintf(file,", retry=%s\n", p_time(_getlong(cp)));
- cp += sizeof(u_long);
- fprintf(file,"\texpire=%s", p_time(_getlong(cp)));
- cp += sizeof(u_long);
- fprintf(file,", min=%s\n", p_time(_getlong(cp)));
- cp += sizeof(u_long);
- break;
-
- case T_MINFO:
- fprintf(file,"\trequests = ");
- cp = Print_cdname(cp, msg, eom, file);
- fprintf(file,"\n\terrors = ");
- cp = Print_cdname(cp, msg, eom, file);
- break;
-
- case T_UINFO:
- fprintf(file,"\t%s\n", cp);
- cp += dlen;
- break;
-
- case T_UID:
- case T_GID:
- if (dlen == 4) {
- fprintf(file,"\t%cid %ld\n", type == T_UID ? 'u' : 'g',
- _getlong(cp));
- cp += sizeof(int);
- } else
- fprintf(file,"\t%cid of length %ld?\n",
- type == T_UID ? 'u' : 'g', dlen);
- break;
-
- case T_WKS: {
- struct protoent *protoPtr;
-
- if (dlen < sizeof(u_long) + 1)
- break;
- 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(n, 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, "(type NULL, dlen %d)\n", dlen);
- break;
-
- default:
- fprintf(file,"\t???\n");
- cp += dlen;
- }
- if (cp != cp1 + dlen)
- fprintf(file,"packet size error (%#x != %#x)\n", cp, cp1+dlen);
- return (cp);
- }
-