hardenedbsd/HardenedBSD
1
0
Fork 0
mirror of https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git synced 2024-12-30 23:48:09 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity
e5b28dd2ba
HardenedBSD/usr.bin/dig/dig.c

1203 lines
32 KiB
C
Raw Blame History

#ifndef lint
static char rcsid[] = "$Id: dig.c,v 1.4 1995/05/30 06:29:46 rgrimes Exp $";
#endif
/*
* ++Copyright++ 1989
* -
* Copyright (c) 1989
* 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--
*/
/*********************** Notes for the BIND 4.9 release (Paul Vixie, DEC)
* dig 2.0 was written by copying sections of libresolv.a and nslookup
* and modifying them to be more useful for a general lookup utility.
* as of BIND 4.9, the changes needed to support dig have mostly been
* incorporated into libresolv.a and nslookup; dig now links against
* some of nslookup's .o files rather than #including them or maintaining
* local copies of them. in some sense, dig belongs in the nslookup
* subdirectory rather than up here in "tools", but that's for arc@sgi.com
* (owner of nslookup) to decide.
*
* while merging dig back into the BIND release, i made a number of
* structural changes. for one thing, i put all of dig's private
* library routines into this file rather than maintaining them in
* separate, #included, files. i don't like to #include ".c" files.
* i removed all calls to "bcopy", replacing them with structure
* assignments. i removed all "extern"'s of standard functions,
* replacing them with #include's of standard header files. this
* version of dig is probably as portable as the rest of BIND.
*
* i had to remove the query-time and packet-count statistics since
* the current libresolv.a is a lot harder to modify to maintain these
* than the 4.8 one (used in the original dig) was. for consolation,
* i added a "usage" message with extensive help text.
*
* to save my (limited, albeit) sanity, i ran "indent" over the source.
* i also added the standard berkeley/DEC copyrights, since this file now
* contains a fair amount of non-USC code. note that the berkeley and
* DEC copyrights do not prohibit redistribution, with or without fee;
* we add them only to protect ourselves (you have to claim copyright
* in order to disclaim liability and warranty).
*
* Paul Vixie, Palo Alto, CA, April 1993
****************************************************************************/
/*******************************************************************
** DiG -- Domain Information Groper **
** **
** dig.c - Version 2.1 (7/12/94) ("BIND takeover") **
** **
** Developed by: Steve Hotz & Paul Mockapetris **
** USC Information Sciences Institute (USC-ISI) **
** Marina del Rey, California **
** 1989 **
** **
** dig.c - **
** Version 2.0 (9/1/90) **
** o renamed difftime() difftv() to avoid **
** clash with ANSI C **
** o fixed incorrect # args to strcmp,gettimeofday **
** o incorrect length specified to strncmp **
** o fixed broken -sticky -envsa -envset functions **
** o print options/flags redefined & modified **
** **
** Version 2.0.beta (5/9/90) **
** o output format - helpful to `doc` **
** o minor cleanup **
** o release to beta testers **
** **
** Version 1.1.beta (10/26/89) **
** o hanging zone transer (when REFUSED) fixed **
** o trailing dot added to domain names in RDATA **
** o ISI internal **
** **
** Version 1.0.tmp (8/27/89) **
** o Error in prnttime() fixed **
** o no longer dumps core on large pkts **
** o zone transfer (axfr) added **
** o -x added for inverse queries **
** (i.e. "dig -x 128.9.0.32") **
** o give address of default server **
** o accept broadcast to server @255.255.255.255 **
** **
** Version 1.0 (3/27/89) **
** o original release **
** **
** DiG is Public Domain, and may be used for any purpose as **
** long as this notice is not removed. **
**** ****
**** NOTE: Version 2.0.beta is not for public distribution ****
**** ****
*******************************************************************/
#define VERSION 21
#define VSTRING "2.1"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <stdio.h>
#include <resolv.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <setjmp.h>
#include <fcntl.h>
#include <stdlib.h>
#include "res.h"
#define PRF_DEF 0x2ff9
#define PRF_MIN 0xA930
#define PRF_ZONE 0x24f9
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 256
#endif
int eecode = 0;
FILE *qfp;
int sockFD;
#define SAVEENV "DiG.env"
#define DIG_MAXARGS 30
char *defsrv, *srvmsg;
char defbuf[40] = "default -- ";
char srvbuf[60];
static void Usage();
static int SetOption(), printZone(), printRR();
static struct timeval difftv();
static void prnttime();
/* stuff for nslookup modules */
FILE *filePtr;
jmp_buf env;
HostInfo *defaultPtr = NULL;
HostInfo curHostInfo, defaultRec;
int curHostValid = FALSE;
int queryType, queryClass;
extern int StringToClass(), StringToType(); /* subr.c */
#if defined(BSD) && BSD >= 199006 && !defined(RISCOS_BSD)
FILE *yyin = NULL;
void yyrestart(f) { }
#endif
char *pager = NULL;
/* end of nslookup stuff */
/*
** Take arguments appearing in simple string (from file or command line)
** place in char**.
*/
stackarg(y, l)
char *l;
char **y;
{
int done=0;
while (!done) {
switch (*l) {
case '\t':
case ' ':
l++; break;
case '\0':
case '\n':
done++;
*y = NULL;
break;
default:
*y++=l;
while (!isspace(*l))
l++;
if (*l == '\n')
done++;
*l++ = '\0';
*y = NULL;
}
}
}
char myhostname[MAXHOSTNAMELEN];
main(argc, argv)
int argc;
char **argv;
{
struct hostent *hp;
short port = htons(NAMESERVER_PORT);
/* Wierd stuff for SPARC alignment, hurts nothing else. */
union {
HEADER header_;
u_char packet_[PACKETSZ];
} packet_;
#define packet (packet_.packet_)
u_char answer[8*1024];
int n;
char doping[90];
char pingstr[50];
char *afile;
char *addrc, *addrend, *addrbegin;
struct timeval exectime, tv1, tv2, start_time, end_time, query_time;
char *srv;
int anyflag = 0;
int sticky = 0;
int tmp;
int qtypeSet;
int addrflag = 0;
int zone = 0;
int bytes_out, bytes_in;
char cmd[256];
char domain[MAXDNAME];
char msg[120], *msgptr;
char **vtmp;
char *args[DIG_MAXARGS];
char **ax;
char **ay;
int once = 1, dofile = 0; /* batch -vs- interactive control */
char fileq[100];
char *qptr;
int fp;
int wait=0, delay;
int envset=0, envsave=0;
struct __res_state res_x, res_t;
char *pp;
res_init();
_res.pfcode = PRF_DEF;
qtypeSet = 0;
gethostname(myhostname, (sizeof myhostname));
defsrv = strcat(defbuf, inet_ntoa(_res.nsaddr.sin_addr));
res_x = _res;
/*
** If LOCALDEF in environment, should point to file
** containing local favourite defaults. Also look for file
** DiG.env (i.e. SAVEENV) in local directory.
*/
if ((((afile = (char *) getenv("LOCALDEF")) != (char *) NULL) &&
((fp = open(afile, O_RDONLY)) > 0)) ||
((fp = open(SAVEENV, O_RDONLY)) > 0)) {
read(fp, (char *)&res_x, (sizeof res_x));
close(fp);
_res = res_x;
}
/*
** check for batch-mode DiG; also pre-scan for 'help'
*/
vtmp = argv;
ax = args;
while (*vtmp != NULL) {
if (strcmp(*vtmp, "-h") == 0 ||
strcmp(*vtmp, "-help") == 0 ||
strcmp(*vtmp, "-usage") == 0 ||
strcmp(*vtmp, "help") == 0) {
Usage();
exit(0);
}
if (strcmp(*vtmp, "-f") == 0) {
dofile++; once=0;
if ((qfp = fopen(*++vtmp, "r")) == NULL) {
fflush(stdout);
perror("file open");
fflush(stderr);
exit(10);
}
} else {
if (ax - args == DIG_MAXARGS) {
fprintf(stderr, "dig: too many arguments\n");
exit(10);
}
*ax++ = *vtmp;
}
vtmp++;
}
_res.id = 1;
gettimeofday(&tv1, NULL);
/*
** Main section: once if cmd-line query
** while !EOF if batch mode
*/
*fileq = '\0';
while ((dofile && (fgets(fileq,100,qfp) != NULL)) ||
((!dofile) && (once--)))
{
if ((*fileq=='\n') || (*fileq=='#') || (*fileq==';')) {
continue; /* ignore blank lines & comments */
}
/*
* "sticky" requests that before current parsing args
* return to current "working" environment (X******)
*/
if (sticky) {
printf(";; (using sticky settings)\n");
_res = res_x;
}
/* concat cmd-line and file args */
ay = ax;
qptr = fileq;
stackarg(ay, qptr);
/* defaults */
queryType = T_NS;
queryClass = C_IN;
zone = 0;
*pingstr = 0;
srv = NULL;
sprintf(cmd,"\n; <<>> DiG %s <<>> ",VSTRING);
argv = args;
argc = ax - args;
/*
* More cmd-line options than anyone should ever have to
* deal with ....
*/
while (*(++argv) != NULL && **argv != '\0') {
strcat(cmd,*argv); strcat(cmd," ");
if (**argv == '@') {
srv = (*argv+1);
continue;
}
if (**argv == '%')
continue;
if (**argv == '+') {
SetOption(*argv+1);
continue;
}
if (strncmp(*argv,"-nost",5) == 0) {
sticky = 0;
continue;
} else if (strncmp(*argv,"-st",3) == 0) {
sticky++;
continue;
} else if (strncmp(*argv,"-envsa",6) == 0) {
envsave++;
continue;
} else if (strncmp(*argv,"-envse",6) == 0) {
envset++;
continue;
}
if (**argv == '-') {
switch (argv[0][1]) {
case 'T': wait = atoi(*++argv);
break;
case 'c':
if ((tmp = atoi(*++argv))
|| *argv[0]=='0') {
queryClass = tmp;
} else if (tmp = StringToClass(*argv,
0, NULL)
) {
queryClass = tmp;
} else {
printf(
"; invalid class specified\n"
);
}
break;
case 't':
if ((tmp = atoi(*++argv))
|| *argv[0]=='0') {
queryType = tmp;
qtypeSet++;
} else if (tmp = StringToType(*argv,
0, NULL)
) {
queryType = tmp;
qtypeSet++;
} else {
printf(
"; invalid type specified\n"
);
}
break;
case 'x':
if (!qtypeSet) {
queryType = T_ANY;
qtypeSet++;
}
if (!(addrc = *++argv)) {
printf(
"; no arg for -x?\n"
);
break;
}
addrend = addrc + strlen(addrc);
if (*addrend == '.')
*addrend = '\0';
*domain = '\0';
while (addrbegin = strrchr(addrc,'.')) {
strcat(domain, addrbegin+1);
strcat(domain, ".");
*addrbegin = '\0';
}
strcat(domain, addrc);
strcat(domain, ".in-addr.arpa.");
break;
case 'p': port = htons(atoi(*++argv)); break;
case 'P':
if (argv[0][2] != '\0')
strcpy(pingstr,&argv[0][2]);
else
strcpy(pingstr,"ping -s");
break;
#if defined(__RES) && (__RES >= 19931104)
case 'n':
_res.ndots = atoi(&argv[0][2]);
break;
#endif /*__RES*/
} /* switch - */
continue;
} /* if '-' */
if ((tmp = StringToType(*argv, -1, NULL)) != -1) {
if ((T_ANY == tmp) && anyflag++) {
queryClass = C_ANY;
continue;
}
if (T_AXFR == tmp) {
_res.pfcode = PRF_ZONE;
zone++;
} else {
queryType = tmp;
qtypeSet++;
}
} else if ((tmp = StringToClass(*argv, -1, NULL))
!= -1) {
queryClass = tmp;
} else {
bzero(domain, (sizeof domain));
sprintf(domain,"%s",*argv);
}
} /* while argv remains */
if (_res.pfcode & 0x80000)
printf("; pfcode: %08x, options: %08x\n",
_res.pfcode, _res.options);
/*
* Current env. (after this parse) is to become the
* new "working environmnet. Used in conj. with sticky.
*/
if (envset) {
res_x = _res;
envset = 0;
}
/*
* Current env. (after this parse) is to become the
* new default saved environmnet. Save in user specified
* file if exists else is SAVEENV (== "DiG.env").
*/
if (envsave) {
afile = (char *) getenv("LOCALDEF");
if ((afile &&
((fp = open(afile,
O_WRONLY|O_CREAT|O_TRUNC,
S_IREAD|S_IWRITE)) > 0))
||
((fp = open(SAVEENV,
O_WRONLY|O_CREAT|O_TRUNC,
S_IREAD|S_IWRITE)) > 0)) {
write(fp, (char *)&_res, (sizeof _res));
close(fp);
}
envsave = 0;
}
if (_res.pfcode & RES_PRF_CMD)
printf("%s\n", cmd);
addrflag = anyflag = 0;
/*
* Find address of server to query. If not dot-notation, then
* try to resolve domain-name (if so, save and turn off print
* options, this domain-query is not the one we want. Restore
* user options when done.
* Things get a bit wierd since we need to use resolver to be
* able to "put the resolver to work".
*/
srvbuf[0] = 0;
srvmsg = defsrv;
if (srv != NULL) {
struct in_addr addr;
if (inet_aton(srv, &addr)) {
_res.nscount = 1;
_res.nsaddr.sin_addr = addr;
srvmsg = strcat(srvbuf, srv);
} else {
res_t = _res;
_res.pfcode = 0;
_res.options = RES_DEFAULT;
res_init();
hp = gethostbyname(srv);
_res = res_t;
if (hp == NULL
|| hp->h_addr_list == NULL
|| *hp->h_addr_list == NULL) {
fflush(stdout);
fprintf(stderr,
"; Bad server: %s -- using default server and timer opts\n",
srv);
fflush(stderr);
srvmsg = defsrv;
srv = NULL;
} else {
u_int32_t **addr;
_res.nscount = 0;
for (addr = (u_int32_t**)hp->h_addr_list;
*addr && (_res.nscount < MAXNS);
addr++) {
_res.nsaddr_list[
_res.nscount++
].sin_addr.s_addr = **addr;
}
srvmsg = strcat(srvbuf,srv);
strcat(srvbuf, " ");
strcat(srvmsg,
inet_ntoa(_res.nsaddr.sin_addr)
);
}
}
printf("; (%d server%s found)\n",
_res.nscount, (_res.nscount==1)?"":"s");
_res.id += _res.retry;
}
{
int i;
for (i = 0; i < _res.nscount; i++) {
_res.nsaddr_list[i].sin_family = AF_INET;
_res.nsaddr_list[i].sin_port = port;
}
_res.id += _res.retry;
}
if (zone) {
int i;
for (i = 0; i < _res.nscount; i++) {
int x = printZone(domain,
&_res.nsaddr_list[i]);
if (_res.pfcode & RES_PRF_STATS) {
struct timeval exectime;
gettimeofday(&exectime,NULL);
printf(";; FROM: %s to SERVER: %s\n",
myhostname,
inet_ntoa(_res.nsaddr_list[i]
.sin_addr));
printf(";; WHEN: %s",
ctime(&(exectime.tv_sec)));
}
if (!x)
break; /* success */
}
fflush(stdout);
continue;
}
if (*domain && !qtypeSet) {
queryType = T_A;
qtypeSet++;
}
bytes_out = n = res_mkquery(QUERY, domain,
queryClass, queryType,
NULL, 0, NULL,
packet, sizeof(packet));
if (n < 0) {
fflush(stderr);
printf(";; res_mkquery: buffer too small\n\n");
continue;
}
eecode = 0;
__fp_resstat(NULL, stdout);
(void) gettimeofday(&start_time, NULL);
if ((bytes_in = n = res_send(packet, n,
answer, sizeof(answer))) < 0) {
fflush(stdout);
n = 0 - n;
msg[0]=0;
strcat(msg,";; res_send to server ");
strcat(msg,srvmsg);
perror(msg);
fflush(stderr);
if (!dofile) {
if (eecode)
exit(eecode);
else
exit(9);
}
}
(void) gettimeofday(&end_time, NULL);
if (_res.pfcode & RES_PRF_STATS) {
query_time = difftv(start_time, end_time);
printf(";; Total query time: ");
prnttime(query_time);
putchar('\n');
gettimeofday(&exectime,NULL);
printf(";; FROM: %s to SERVER: %s\n",
myhostname, srvmsg);
printf(";; WHEN: %s",
ctime(&(exectime.tv_sec)));
printf(";; MSG SIZE sent: %d rcvd: %d\n",
bytes_out, bytes_in);
}
fflush(stdout);
/*
* Argh ... not particularly elegant. Should put in *real* ping code.
* Would necessitate root priviledges for icmp port though!
*/
if (*pingstr) {
sprintf(doping,"%s %s 56 3 | tail -3",pingstr,
(srv==NULL)?(defsrv+10):srv);
system(doping);
}
putchar('\n');
/*
* Fairly crude method and low overhead method of keeping two
* batches started at different sites somewhat synchronized.
*/
gettimeofday(&tv2, NULL);
delay = (int)(tv2.tv_sec - tv1.tv_sec);
if (delay < wait) {
sleep(wait - delay);
}
}
return(eecode);
}
static void
Usage()
{
fputs("\
usage: dig [@server] [domain] [q-type] [q-class] {q-opt} {d-opt} [%comment]\n\
where: server,\n\
domain are names in the Domain Name System\n\
q-class is one of (in,any,...) [default: in]\n\
q-type is one of (a,any,mx,ns,soa,hinfo,axfr,txt,...) [default: a]\n\
", stderr);
fputs("\
q-opt is one of:\n\
-x dot-notation-address (shortcut to in-addr.arpa lookups)\n\
-f file (batch mode input file name)\n\
-T time (batch mode time delay, per query)\n\
-p port (nameserver is on this port) [53]\n\
-Pping-string (see man page)\n\
-t query-type (synonym for q-type)\n\
-c query-class (synonym for q-class)\n\
-envsav,-envset (see man page)\n\
-[no]stick (see man page)\n\
", stderr);
fputs("\
d-opt is of the form ``+keyword=value'' where keyword is one of:\n\
[no]debug [no]d2 [no]recurse retry=# time=# [no]ko [no]vc\n\
[no]defname [no]search domain=NAME [no]ignore [no]primary\n\
[no]aaonly [no]sort [no]cmd [no]stats [no]Header [no]header\n\
[no]ttlid [no]cl [no]qr [no]reply [no]ques [no]answer\n\
[no]author [no]addit pfdef pfmin pfset=# pfand=# pfor=#\n\
", stderr);
fputs("\
notes: defname and search don't work; use fully-qualified names.\n\
", stderr);
}
static int
SetOption(string)
char *string;
{
char option[NAME_LEN];
char type[NAME_LEN];
char *ptr;
int i;
i = sscanf(string, " %s", option);
if (i != 1) {
fprintf(stderr, ";*** Invalid option: %s\n", option);
return(ERROR);
}
if (strncmp(option, "aa", 2) == 0) { /* aaonly */
_res.options |= RES_AAONLY;
} else if (strncmp(option, "noaa", 4) == 0) {
_res.options &= ~RES_AAONLY;
} else if (strncmp(option, "deb", 3) == 0) { /* debug */
_res.options |= RES_DEBUG;
} else if (strncmp(option, "nodeb", 5) == 0) {
_res.options &= ~(RES_DEBUG | RES_DEBUG2);
} else if (strncmp(option, "ko", 2) == 0) { /* keepopen */
_res.options |= (RES_STAYOPEN | RES_USEVC);
} else if (strncmp(option, "noko", 4) == 0) {
_res.options &= ~RES_STAYOPEN;
} else if (strncmp(option, "d2", 2) == 0) { /* d2 (more debug) */
_res.options |= (RES_DEBUG | RES_DEBUG2);
} else if (strncmp(option, "nod2", 4) == 0) {
_res.options &= ~RES_DEBUG2;
} else if (strncmp(option, "def", 3) == 0) { /* defname */
_res.options |= RES_DEFNAMES;
} else if (strncmp(option, "nodef", 5) == 0) {
_res.options &= ~RES_DEFNAMES;
} else if (strncmp(option, "sea", 3) == 0) { /* search list */
_res.options |= RES_DNSRCH;
} else if (strncmp(option, "nosea", 5) == 0) {
_res.options &= ~RES_DNSRCH;
} else if (strncmp(option, "do", 2) == 0) { /* domain */
ptr = strchr(option, '=');
if (ptr != NULL) {
sscanf(++ptr, "%s", _res.defdname);
}
} else if (strncmp(option, "ti", 2) == 0) { /* timeout */
ptr = strchr(option, '=');
if (ptr != NULL) {
sscanf(++ptr, "%d", &_res.retrans);
}
} else if (strncmp(option, "ret", 3) == 0) { /* retry */
ptr = strchr(option, '=');
if (ptr != NULL) {
sscanf(++ptr, "%d", &_res.retry);
}
} else if (strncmp(option, "i", 1) == 0) { /* ignore */
_res.options |= RES_IGNTC;
} else if (strncmp(option, "noi", 3) == 0) {
_res.options &= ~RES_IGNTC;
} else if (strncmp(option, "pr", 2) == 0) { /* primary */
_res.options |= RES_PRIMARY;
} else if (strncmp(option, "nop", 3) == 0) {
_res.options &= ~RES_PRIMARY;
} else if (strncmp(option, "rec", 3) == 0) { /* recurse */
_res.options |= RES_RECURSE;
} else if (strncmp(option, "norec", 5) == 0) {
_res.options &= ~RES_RECURSE;
} else if (strncmp(option, "v", 1) == 0) { /* vc */
_res.options |= RES_USEVC;
} else if (strncmp(option, "nov", 3) == 0) {
_res.options &= ~RES_USEVC;
} else if (strncmp(option, "pfset", 5) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL) {
_res.pfcode = xstrtonum(++ptr);
}
} else if (strncmp(option, "pfand", 5) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL) {
_res.pfcode = _res.pfcode & xstrtonum(++ptr);
}
} else if (strncmp(option, "pfor", 4) == 0) {
ptr = strchr(option, '=');
if (ptr != NULL) {
_res.pfcode |= xstrtonum(++ptr);
}
} else if (strncmp(option, "pfmin", 5) == 0) {
_res.pfcode = PRF_MIN;
} else if (strncmp(option, "pfdef", 5) == 0) {
_res.pfcode = PRF_DEF;
} else if (strncmp(option, "an", 2) == 0) { /* answer section */
_res.pfcode |= RES_PRF_ANS;
} else if (strncmp(option, "noan", 4) == 0) {
_res.pfcode &= ~RES_PRF_ANS;
} else if (strncmp(option, "qu", 2) == 0) { /* question section */
_res.pfcode |= RES_PRF_QUES;
} else if (strncmp(option, "noqu", 4) == 0) {
_res.pfcode &= ~RES_PRF_QUES;
} else if (strncmp(option, "au", 2) == 0) { /* authority section */
_res.pfcode |= RES_PRF_AUTH;
} else if (strncmp(option, "noau", 4) == 0) {
_res.pfcode &= ~RES_PRF_AUTH;
} else if (strncmp(option, "ad", 2) == 0) { /* addition section */
_res.pfcode |= RES_PRF_ADD;
} else if (strncmp(option, "noad", 4) == 0) {
_res.pfcode &= ~RES_PRF_ADD;
} else if (strncmp(option, "tt", 2) == 0) { /* TTL & ID */
_res.pfcode |= RES_PRF_TTLID;
} else if (strncmp(option, "nott", 4) == 0) {
_res.pfcode &= ~RES_PRF_TTLID;
} else if (strncmp(option, "he", 2) == 0) { /* head flags stats */
_res.pfcode |= RES_PRF_HEAD2;
} else if (strncmp(option, "nohe", 4) == 0) {
_res.pfcode &= ~RES_PRF_HEAD2;
} else if (strncmp(option, "H", 1) == 0) { /* header all */
_res.pfcode |= RES_PRF_HEADX;
} else if (strncmp(option, "noH", 3) == 0) {
_res.pfcode &= ~(RES_PRF_HEADX);
} else if (strncmp(option, "qr", 2) == 0) { /* query */
_res.pfcode |= RES_PRF_QUERY;
} else if (strncmp(option, "noqr", 4) == 0) {
_res.pfcode &= ~RES_PRF_QUERY;
} else if (strncmp(option, "rep", 3) == 0) { /* reply */
_res.pfcode |= RES_PRF_REPLY;
} else if (strncmp(option, "norep", 5) == 0) {
_res.pfcode &= ~RES_PRF_REPLY;
} else if (strncmp(option, "cm", 2) == 0) { /* command line */
_res.pfcode |= RES_PRF_CMD;
} else if (strncmp(option, "nocm", 4) == 0) {
_res.pfcode &= ~RES_PRF_CMD;
} else if (strncmp(option, "cl", 2) == 0) { /* class mnemonic */
_res.pfcode |= RES_PRF_CLASS;
} else if (strncmp(option, "nocl", 4) == 0) {
_res.pfcode &= ~RES_PRF_CLASS;
} else if (strncmp(option, "st", 2) == 0) { /* stats*/
_res.pfcode |= RES_PRF_STATS;
} else if (strncmp(option, "nost", 4) == 0) {
_res.pfcode &= ~RES_PRF_STATS;
} else {
fprintf(stderr, "; *** Invalid option: %s\n", option);
return(ERROR);
}
res_re_init();
return(SUCCESS);
}
/*
* Force a reinitialization when the domain is changed.
*/
res_re_init()
{
static char localdomain[] = "LOCALDOMAIN";
char *buf;
long pfcode = _res.pfcode;
/* this is ugly but putenv() is more portable than setenv() */
buf = malloc((sizeof localdomain) +strlen(_res.defdname) +10/*fuzz*/);
sprintf(buf, "%s=%s", localdomain, _res.defdname);
putenv(buf); /* keeps the argument, so we won't free it */
_res.options &= ~RES_INIT;
res_init();
_res.pfcode = pfcode;
}
/*
* convert char string (decimal, octal, or hex) to integer
*/
int
xstrtonum(p)
char *p;
{
int v = 0;
int i;
int b = 10;
int flag = 0;
while (*p != 0) {
if (!flag++)
if (*p == '0') {
b = 8; p++;
continue;
}
if (isupper(*p))
*p=tolower(*p);
if (*p == 'x') {
b = 16; p++;
continue;
}
if (isdigit(*p)) {
i = *p - '0';
} else if (isxdigit(*p)) {
i = *p - 'a' + 10;
} else {
fprintf(stderr,
"; *** Bad char in numeric string..ignored\n");
i = -1;
}
if (i >= b) {
fprintf(stderr,
"; *** Bad char in numeric string..ignored\n");
i = -1;
}
if (i >= 0)
v = v * b + i;
p++;
}
return(v);
}
/* this code was cloned from nslookup/list.c */
extern char *_res_resultcodes[]; /* res_debug.c */
typedef union {
HEADER qb1;
u_char qb2[PACKETSZ];
} querybuf;
static int
printZone(zone, sin)
char *zone;
struct sockaddr_in *sin;
{
querybuf buf;
HEADER *headerPtr;
int msglen;
int amtToRead;
int numRead;
int numAnswers = 0;
int result;
int soacnt = 0;
int sockFD;
u_short len;
u_char *cp, *nmp;
char dname[2][NAME_LEN];
char file[NAME_LEN];
static u_char *answer = NULL;
static int answerLen = 0;
enum {
NO_ERRORS,
ERR_READING_LEN,
ERR_READING_MSG,
ERR_PRINTING
} error = NO_ERRORS;
/*
* Create a query packet for the requested zone name.
*/
msglen = res_mkquery(QUERY, zone, queryClass, T_AXFR, NULL,
0, 0, buf.qb2, sizeof(buf));
if (msglen < 0) {
if (_res.options & RES_DEBUG) {
fprintf(stderr, ";; res_mkquery failed\n");
}
return (ERROR);
}
/*
* Set up a virtual circuit to the server.
*/
if ((sockFD = socket(sin->sin_family, SOCK_STREAM, 0)) < 0) {
int e = errno;
perror(";; socket");
return(e);
}
if (connect(sockFD, (struct sockaddr *)sin, sizeof(*sin)) < 0) {
int e = errno;
perror(";; connect");
(void) close(sockFD);
sockFD = -1;
return e;
}
/*
* Send length & message for zone transfer
*/
__putshort(msglen, (u_char *)&len);
if (write(sockFD, (char *)&len, INT16SZ) != INT16SZ ||
write(sockFD, (char *)&buf, msglen) != msglen) {
int e = errno;
perror(";; write");
(void) close(sockFD);
sockFD = -1;
return(e);
}
dname[0][0] = '\0';
while (1) {
u_int16_t tmp;
/*
* Read the length of the response.
*/
cp = (u_char *) &tmp;
amtToRead = INT16SZ;
while (amtToRead > 0 && (numRead=read(sockFD, cp, amtToRead)) > 0){
cp += numRead;
amtToRead -= numRead;
}
if (numRead <= 0) {
error = ERR_READING_LEN;
break;
}
if ((len = _getshort((u_char*)&tmp)) == 0) {
break; /* nothing left to read */
}
/*
* The server sent too much data to fit the existing buffer --
* allocate a new one.
*/
if (len > (u_int)answerLen) {
if (answerLen != 0) {
free(answer);
}
answerLen = len;
answer = (u_char *)Malloc(answerLen);
}
/*
* Read the response.
*/
amtToRead = len;
cp = answer;
while (amtToRead > 0 && (numRead=read(sockFD, cp, amtToRead)) > 0) {
cp += numRead;
amtToRead -= numRead;
}
if (numRead <= 0) {
error = ERR_READING_MSG;
break;
}
result = printRR(stdout, answer, cp);
if (result != 0) {
error = ERR_PRINTING;
break;
}
numAnswers++;
cp = answer + HFIXEDSZ;
if (ntohs(((HEADER *)answer)->qdcount) > 0)
cp += dn_skipname((u_char *)cp,
(u_char *)answer + len) + QFIXEDSZ;
nmp = cp;
cp += dn_skipname((u_char *)cp, (u_char *)answer + len);
if ((_getshort((u_char*)cp) == T_SOA)) {
(void) dn_expand(answer, answer + len, nmp,
dname[soacnt], sizeof dname[0]);
if (soacnt) {
if (strcmp(dname[0], dname[1]) == 0)
break;
} else
soacnt++;
}
}
fprintf(stdout, ";; Received %d record%s.\n",
numAnswers, (numAnswers != 1) ? "s" : "");
(void) close(sockFD);
sockFD = -1;
switch (error) {
case NO_ERRORS:
return (0);
case ERR_READING_LEN:
return(EMSGSIZE);
case ERR_PRINTING:
return(result);
case ERR_READING_MSG:
return(EMSGSIZE);
default:
return(EFAULT);
}
}
static int
printRR(file, msg, eom)
FILE *file;
u_char *msg, *eom;
{
register u_char *cp;
HEADER *headerPtr;
int type, class, dlen, nameLen;
u_int32_t ttl;
int n, pref;
struct in_addr inaddr;
char name[NAME_LEN];
char name2[NAME_LEN];
Boolean stripped;
/*
* Read the header fields.
*/
headerPtr = (HEADER *)msg;
cp = msg + HFIXEDSZ;
if (headerPtr->rcode != NOERROR) {
return(headerPtr->rcode);
}
/*
* We are looking for info from answer resource records.
* If there aren't any, return with an error. We assume
* there aren't any question records.
*/
if (ntohs(headerPtr->ancount) == 0) {
return(NO_INFO);
} else {
if (ntohs(headerPtr->qdcount) > 0) {
nameLen = dn_skipname(cp, eom);
if (nameLen < 0)
return (ERROR);
cp += nameLen + QFIXEDSZ;
}
cp = (u_char*) p_rr(cp, msg, stdout);
}
return(SUCCESS);
}
static
struct timeval
difftv(a, b)
struct timeval a, b;
{
static struct timeval diff;
diff.tv_sec = b.tv_sec - a.tv_sec;
if ((diff.tv_usec = b.tv_usec - a.tv_usec) < 0) {
diff.tv_sec--;
diff.tv_usec += 1000000;
}
return(diff);
}
static
void
prnttime(t)
struct timeval t;
{
printf("%u msec", t.tv_sec * 1000 + (t.tv_usec / 1000));
}
Reference in New Issue View Git Blame Copy Permalink