lib-libc-net

被广泛使用的域名服务(DNS)软件

! static char *
X  dewks(wks)
X  	int wks;
X  {
X  	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);
X  	}
X  }
X  
! static char *
X  deproto(protonum)
X  	int protonum;
X  {
X  	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);
X  	}
X  }
X  
! static char *
X  do_rrset(msg, cp, cnt, pflag, file, hs)
X  	int cnt, pflag;
! 	char *cp,*msg, *hs;
X  	FILE *file;
X  {
--- 112,196 ----
X  static char retbuf[16];
X  
! static const char *
X  dewks(wks)
X  	int wks;
X  {
X  	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);
X  	}
X  }
X  
! static const char *
X  deproto(protonum)
X  	int protonum;
X  {
X  	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);
X  	}
X  }
X  
! static const u_char *
X  do_rrset(msg, cp, cnt, pflag, file, hs)
X  	int cnt, pflag;
! 	const u_char *cp, *msg;
! 	const char *hs;
X  	FILE *file;
X  {
***************
*** 201,216 ****
X  
X  	/*
! 	 * Print answer records
X  	 */
! 	sflag = _res.pfcode & pflag;
X  	if (n = ntohs(cnt)) {
! 		if (!_res.pfcode || sflag && _res.pfcode & RES_PRF_HEAD1)
X  			fprintf(file, hs);
X  		while (--n >= 0) {
! 			cp = p_rr(cp, msg, file);
! 			if ((cp-msg) > PACKETSZ)
X  				return (NULL);
X  		}
! 		if (!_res.pfcode || sflag && _res.pfcode & RES_PRF_HEAD1)
X  			putc('\n', file);
X  	}
--- 199,227 ----
X  
X  	/*
! 	 * Print answer records.
X  	 */
! 	sflag = (_res.pfcode & pflag);
X  	if (n = ntohs(cnt)) {
! 		if ((!_res.pfcode) ||
! 		    ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
X  			fprintf(file, hs);
X  		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) > PACKETSZ)
X  				return (NULL);
X  		}
! 		if ((!_res.pfcode) ||
! 		    ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
X  			putc('\n', file);
X  	}
***************
*** 218,223 ****
X  }
X  
X  __p_query(msg)
! 	char *msg;
X  {
X  	__fp_query(msg, stdout);
--- 229,235 ----
X  }
X  
+ void
X  __p_query(msg)
! 	const u_char *msg;
X  {
X  	__fp_query(msg, stdout);
***************
*** 233,245 ****
X  	FILE *file;
X  {
! 	int bit;
X  
X  	fprintf(file, ";; res options:");
X  	if (!statp)
X  		statp = &_res;
! 	for (bit = 0; bit < 32; bit++) {	/* XXX 32 - bad assumption! */
! 		if (statp->options & 1 << bit)
! 			fprintf(file, " %s", p_option(1 << bit));
! 	}
X  	putc('\n', file);
X  }
--- 245,256 ----
X  	FILE *file;
X  {
! 	register u_long mask;
X  
X  	fprintf(file, ";; res options:");
X  	if (!statp)
X  		statp = &_res;
! 	for (mask = 1;  mask != 0;  mask <<= 1)
! 		if (statp->options & mask)
! 			fprintf(file, " %s", p_option(mask));
X  	putc('\n', file);
X  }
***************
*** 250,274 ****
X   */
X  void
! __fp_query(msg,file)
! 	char *msg;
X  	FILE *file;
X  {
! 	register char *cp;
! 	register HEADER *hp;
X  	register int n;
X  
X  	/*
X  	 * Print header fields.
X  	 */
X  	hp = (HEADER *)msg;
! 	cp = msg + sizeof(HEADER);
! 	if (!_res.pfcode || _res.pfcode & RES_PRF_HEADX || hp->rcode) {
X  		fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
! 		    _res_opcodes[hp->opcode], _res_resultcodes[hp->rcode],
! 		    ntohs(hp->id));
X  		putc('\n', file);
X  	}
X  	putc(';', file);
! 	if (!_res.pfcode || _res.pfcode & RES_PRF_HEAD2) {
X  		fprintf(file, "; flags:");
X  		if (hp->qr)
--- 261,291 ----
X   */
X  void
! __fp_nquery(msg, len, file)
! 	const u_char *msg;
! 	int len;
X  	FILE *file;
X  {
! 	register const u_char *cp, *endMark;
! 	register const HEADER *hp;
X  	register int n;
X  
+ #define TruncTest(x) if (x >= endMark) goto trunc
+ #define	ErrorTest(x) if (x == NULL) goto error
+ 
X  	/*
X  	 * Print header fields.
X  	 */
X  	hp = (HEADER *)msg;
! 	cp = msg + HFIXEDSZ;
! 	endMark = cp + len;
! 	if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || hp->rcode) {
X  		fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
! 			_res_opcodes[hp->opcode],
! 			_res_resultcodes[hp->rcode],
! 			ntohs(hp->id));
X  		putc('\n', file);
X  	}
X  	putc(';', file);
! 	if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD2)) {
X  		fprintf(file, "; flags:");
X  		if (hp->qr)
***************
*** 285,289 ****
X  			fprintf(file, " pr");
X  	}
! 	if (!_res.pfcode || _res.pfcode & RES_PRF_HEAD1) {
X  		fprintf(file, "; Ques: %d", ntohs(hp->qdcount));
X  		fprintf(file, ", Ans: %d", ntohs(hp->ancount));
--- 302,306 ----
X  			fprintf(file, " pr");
X  	}
! 	if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD1)) {
X  		fprintf(file, "; Ques: %d", ntohs(hp->qdcount));
X  		fprintf(file, ", Ans: %d", ntohs(hp->ancount));
***************
*** 291,318 ****
X  		fprintf(file, ", Addit: %d", ntohs(hp->arcount));
X  	}
! #if 1
! 	if (!_res.pfcode || _res.pfcode & 
! 	    (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))
X  		putc('\n',file);
! #endif
X  	/*
X  	 * Print question records.
X  	 */
X  	if (n = ntohs(hp->qdcount)) {
! 		if (!_res.pfcode || _res.pfcode & RES_PRF_QUES)
X  			fprintf(file, ";; QUESTIONS:\n");
X  		while (--n >= 0) {
X  			fprintf(file, ";;\t");
X  			cp = p_cdname(cp, msg, file);
! 			if (cp == NULL)
! 				return;
! 			if (!_res.pfcode || _res.pfcode & RES_PRF_QUES)
X  				fprintf(file, ", type = %s",
! 				    __p_type(_getshort(cp)));
! 			cp += sizeof(u_int16_t);
! 			if (!_res.pfcode || _res.pfcode & RES_PRF_QUES)
X  				fprintf(file, ", class = %s\n",
! 				    __p_class(_getshort(cp)));
! 			cp += sizeof(u_int16_t);
X  			putc('\n', file);
X  		}
--- 308,336 ----
X  		fprintf(file, ", Addit: %d", ntohs(hp->arcount));
X  	}
! 	if ((!_res.pfcode) || (_res.pfcode & 
! 		(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
X  		putc('\n',file);
! 	}
X  	/*
X  	 * Print question records.
X  	 */
X  	if (n = ntohs(hp->qdcount)) {
! 		if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
X  			fprintf(file, ";; QUESTIONS:\n");
X  		while (--n >= 0) {
X  			fprintf(file, ";;\t");
+ 			TruncTest(cp);
X  			cp = p_cdname(cp, msg, file);
! 			ErrorTest(cp);
! 			TruncTest(cp);
! 			if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
X  				fprintf(file, ", type = %s",
! 					__p_type(_getshort((u_char*)cp)));
! 			cp += INT16SZ;
! 			TruncTest(cp);
! 			if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
X  				fprintf(file, ", class = %s\n",
! 					__p_class(_getshort((u_char*)cp)));
! 			cp += INT16SZ;
X  			putc('\n', file);
X  		}
***************
*** 321,346 ****
X  	 * Print authoritative answer records
X  	 */
! 	cp = do_rrset(msg, cp, hp->ancount, RES_PRF_ANS, file, ";; ANSWERS:\n");
! 	if (cp == NULL)
! 		return;
X  
X  	/*
X  	 * print name server records
X  	 */
X  	cp = do_rrset(msg, cp, hp->nscount, RES_PRF_AUTH, file,
! 	    ";; AUTHORITY RECORDS:\n");
! 	if (!cp)
! 		return;
X  
X  	/*
X  	 * print additional records
X  	 */
X  	cp = do_rrset(msg, cp, hp->arcount, RES_PRF_ADD, file,
! 	    ";; ADDITIONAL RECORDS:\n");
X  }
X  
! char *
! p_cdname(cp, msg, file)
! 	char *cp, *msg;
X  	FILE *file;
X  {
--- 339,382 ----
X  	 * Print authoritative answer records
X  	 */
! 	TruncTest(cp);
! 	cp = do_rrset(msg, cp, hp->ancount, RES_PRF_ANS, file,
! 		      ";; ANSWERS:\n");
! 	ErrorTest(cp);
X  
X  	/*
X  	 * print name server records
X  	 */
+ 	TruncTest(cp);
X  	cp = do_rrset(msg, cp, hp->nscount, RES_PRF_AUTH, file,
! 		      ";; AUTHORITY RECORDS:\n");
! 	ErrorTest(cp);
X  
+ 	TruncTest(cp);
X  	/*
X  	 * print additional records
X  	 */
X  	cp = do_rrset(msg, 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");
X  }
X  
! 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;
X  	FILE *file;
X  {
***************
*** 348,353 ****
X  	int n;
X  
! 	if ((n = dn_expand((u_char *)msg, (u_char *)cp + MAXCDNAME,
! 	    (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
X  		return (NULL);
X  	if (name[0] == '\0')
--- 384,388 ----
X  	int n;
X  
! 	if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
X  		return (NULL);
X  	if (name[0] == '\0')
***************
*** 358,364 ****
X  }
X  
! char *
! p_fqname(cp, msg, file)
! 	char *cp, *msg;
X  	FILE *file;
X  {
--- 393,410 ----
X  }
X  
! 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;
X  	FILE *file;
X  {
***************
*** 366,371 ****
X  	int n, len;
X  
! 	if ((n = dn_expand((u_char *)msg, (u_char *)cp + MAXCDNAME,
! 	    (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
X  		return (NULL);
X  	if (name[0] == '\0') {
--- 412,416 ----
X  	int n, len;
X