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bind/bin/dig/dig.c

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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include <isc/app.h>
#include <isc/netaddr.h>
#include <isc/parseint.h>
#include <isc/platform.h>
#include <isc/print.h>
#include <isc/string.h>
#include <isc/task.h>
#include <isc/util.h>
#include <pk11/site.h>
#include <dns/byaddr.h>
#include <dns/fixedname.h>
#include <dns/masterdump.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/rcode.h>
#include <dns/rdata.h>
#include <dns/rdataset.h>
#include <dns/rdatatype.h>
#include <dns/rdataclass.h>
#include <dns/result.h>
#include <dns/tsig.h>
#include <dig/dig.h>
#define ADD_STRING(b, s) { \
if (strlen(s) >= isc_buffer_availablelength(b)) \
return (ISC_R_NOSPACE); \
else \
isc_buffer_putstr(b, s); \
}
#define DIG_MAX_ADDRESSES 20
dig_lookup_t *default_lookup = NULL;
static char *batchname = NULL;
static FILE *batchfp = NULL;
static char *argv0;
static int addresscount = 0;
static char domainopt[DNS_NAME_MAXTEXT];
static char hexcookie[81];
static bool short_form = false, printcmd = true,
plusquest = false, pluscomm = false,
ipv4only = false, ipv6only = false, digrc = true;
static uint32_t splitwidth = 0xffffffff;
/*% opcode text */
static const char * const opcodetext[] = {
"QUERY",
"IQUERY",
"STATUS",
"RESERVED3",
"NOTIFY",
"UPDATE",
"RESERVED6",
"RESERVED7",
"RESERVED8",
"RESERVED9",
"RESERVED10",
"RESERVED11",
"RESERVED12",
"RESERVED13",
"RESERVED14",
"RESERVED15"
};
static const char *
rcode_totext(dns_rcode_t rcode) {
static char buf[64];
isc_buffer_t b;
isc_result_t result;
memset(buf, 0, sizeof(buf));
isc_buffer_init(&b, buf + 1, sizeof(buf) - 2);
result = dns_rcode_totext(rcode, &b);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (strspn(buf + 1, "0123456789") == strlen(buf + 1)) {
buf[0] = '?';
return(buf);
}
return (buf + 1);
}
/*% print usage */
static void
print_usage(FILE *fp) {
fputs(
"Usage: dig [@global-server] [domain] [q-type] [q-class] {q-opt}\n"
" {global-d-opt} host [@local-server] {local-d-opt}\n"
" [ host [@local-server] {local-d-opt} [...]]\n", fp);
}
#if TARGET_OS_IPHONE
static void usage(void) {
fprintf(stderr, "Press <Help> for complete list of options\n");
}
#else
ISC_PLATFORM_NORETURN_PRE static void
usage(void) ISC_PLATFORM_NORETURN_POST;
static void
usage(void) {
print_usage(stderr);
fputs("\nUse \"dig -h\" (or \"dig -h | more\") "
"for complete list of options\n", stderr);
exit(1);
}
#endif
/*% version */
static void
version(void) {
fputs("DiG " VERSION "\n", stderr);
}
/*% help */
static void
help(void) {
print_usage(stdout);
fputs(
"Where: domain is in the Domain Name System\n"
" q-class is one of (in,hs,ch,...) [default: in]\n"
" q-type is one of (a,any,mx,ns,soa,hinfo,axfr,txt,...) [default:a]\n"
" (Use ixfr=version for type ixfr)\n"
" q-opt is one of:\n"
" -4 (use IPv4 query transport only)\n"
" -6 (use IPv6 query transport only)\n"
" -b address[#port] (bind to source address/port)\n"
" -c class (specify query class)\n"
" -f filename (batch mode)\n"
" -k keyfile (specify tsig key file)\n"
" -m (enable memory usage debugging)\n"
" -p port (specify port number)\n"
" -q name (specify query name)\n"
" -r (do not read ~/.digrc)\n"
" -t type (specify query type)\n"
" -u (display times in usec instead of msec)\n"
" -x dot-notation (shortcut for reverse lookups)\n"
" -y [hmac:]name:key (specify named base64 tsig key)\n"
" d-opt is of the form +keyword[=value], where keyword is:\n"
" +[no]aaflag (Set AA flag in query (+[no]aaflag))\n"
" +[no]aaonly (Set AA flag in query (+[no]aaflag))\n"
" +[no]additional (Control display of additional section)\n"
" +[no]adflag (Set AD flag in query (default on))\n"
" +[no]all (Set or clear all display flags)\n"
" +[no]answer (Control display of answer section)\n"
" +[no]authority (Control display of authority section)\n"
" +[no]badcookie (Retry BADCOOKIE responses)\n"
" +[no]besteffort (Try to parse even illegal messages)\n"
" +bufsize=### (Set EDNS0 Max UDP packet size)\n"
" +[no]cdflag (Set checking disabled flag in query)\n"
" +[no]class (Control display of class in records)\n"
" +[no]cmd (Control display of command line)\n"
" +[no]comments (Control display of comment lines)\n"
" +[no]cookie (Add a COOKIE option to the request)\n"
" +[no]crypto (Control display of cryptographic "
"fields in records)\n"
" +[no]defname (Use search list (+[no]search))\n"
" +[no]dnssec (Request DNSSEC records)\n"
" +domain=### (Set default domainname)\n"
" +[no]dscp[=###] (Set the DSCP value to ### [0..63])\n"
" +[no]edns[=###] (Set EDNS version) [0]\n"
" +ednsflags=### (Set EDNS flag bits)\n"
" +[no]ednsnegotiation (Set EDNS version negotiation)\n"
" +ednsopt=###[:value] (Send specified EDNS option)\n"
" +noednsopt (Clear list of +ednsopt options)\n"
" +[no]expandaaaa (Expand AAAA records)\n"
" +[no]expire (Request time to expire)\n"
" +[no]fail (Don't try next server on SERVFAIL)\n"
" +[no]header-only (Send query without a question section)\n"
" +[no]identify (ID responders in short answers)\n"
#ifdef HAVE_LIBIDN2
" +[no]idnin (Parse IDN names [default=on on tty])\n"
" +[no]idnout (Convert IDN response [default=on on tty])\n"
#endif
" +[no]ignore (Don't revert to TCP for TC responses.)\n"
" +[no]keepalive (Request EDNS TCP keepalive)\n"
" +[no]keepopen (Keep the TCP socket open between queries)\n"
" +[no]mapped (Allow mapped IPv4 over IPv6)\n"
" +[no]multiline (Print records in an expanded format)\n"
" +ndots=### (Set search NDOTS value)\n"
" +[no]nsid (Request Name Server ID)\n"
" +[no]nssearch (Search all authoritative nameservers)\n"
" +[no]onesoa (AXFR prints only one soa record)\n"
" +[no]opcode=### (Set the opcode of the request)\n"
" +padding=### (Set padding block size [0])\n"
" +[no]qr (Print question before sending)\n"
" +[no]question (Control display of question section)\n"
" +[no]raflag (Set RA flag in query (+[no]raflag))\n"
" +[no]rdflag (Recursive mode (+[no]recurse))\n"
" +[no]recurse (Recursive mode (+[no]rdflag))\n"
" +retry=### (Set number of UDP retries) [2]\n"
" +[no]rrcomments (Control display of per-record "
"comments)\n"
" +[no]search (Set whether to use searchlist)\n"
" +[no]short (Display nothing except short\n"
" form of answer)\n"
" +[no]showsearch (Search with intermediate results)\n"
" +[no]split=## (Split hex/base64 fields into chunks)\n"
" +[no]stats (Control display of statistics)\n"
" +subnet=addr (Set edns-client-subnet option)\n"
" +[no]tcflag (Set TC flag in query (+[no]tcflag))\n"
" +[no]tcp (TCP mode (+[no]vc))\n"
" +timeout=### (Set query timeout) [5]\n"
" +[no]trace (Trace delegation down from root [+dnssec])\n"
" +tries=### (Set number of UDP attempts) [3]\n"
" +[no]ttlid (Control display of ttls in records)\n"
" +[no]ttlunits (Display TTLs in human-readable units)\n"
" +[no]unknownformat (Print RDATA in RFC 3597 \"unknown\" format)\n"
" +[no]vc (TCP mode (+[no]tcp))\n"
" +[no]zflag (Set Z flag in query)\n"
" global d-opts and servers (before host name) affect all queries.\n"
" local d-opts and servers (after host name) affect only that lookup.\n"
" -h (print help and exit)\n"
" -v (print version and exit)\n",
stdout);
}
/*%
* Callback from dighost.c to print the received message.
*/
static void
received(unsigned int bytes, isc_sockaddr_t *from, dig_query_t *query) {
uint64_t diff;
time_t tnow;
struct tm tmnow;
#ifdef WIN32
wchar_t time_str[100];
#else
char time_str[100];
#endif
char fromtext[ISC_SOCKADDR_FORMATSIZE];
isc_sockaddr_format(from, fromtext, sizeof(fromtext));
if (query->lookup->stats && !short_form) {
diff = isc_time_microdiff(&query->time_recv, &query->time_sent);
if (query->lookup->use_usec)
printf(";; Query time: %ld usec\n", (long) diff);
else
printf(";; Query time: %ld msec\n", (long) diff / 1000);
printf(";; SERVER: %s(%s)\n", fromtext, query->servname);
time(&tnow);
#if !defined(WIN32)
(void)localtime_r(&tnow, &tmnow);
#else
tmnow = *localtime(&tnow);
#endif
#ifdef WIN32
/*
* On Windows, time zone name ("%Z") may be a localized
* wide-character string, which strftime() handles incorrectly.
*/
if (wcsftime(time_str, sizeof(time_str)/sizeof(time_str[0]),
L"%a %b %d %H:%M:%S %Z %Y", &tmnow) > 0U)
printf(";; WHEN: %ls\n", time_str);
#else
if (strftime(time_str, sizeof(time_str),
"%a %b %d %H:%M:%S %Z %Y", &tmnow) > 0U)
printf(";; WHEN: %s\n", time_str);
#endif
if (query->lookup->doing_xfr) {
printf(";; XFR size: %u records (messages %u, "
"bytes %" PRIu64 ")\n",
query->rr_count, query->msg_count,
query->byte_count);
} else {
printf(";; MSG SIZE rcvd: %u\n", bytes);
}
if (tsigkey != NULL) {
if (!validated)
puts(";; WARNING -- Some TSIG could not "
"be validated");
}
if ((tsigkey == NULL) && (keysecret[0] != 0)) {
puts(";; WARNING -- TSIG key was not used.");
}
puts("");
} else if (query->lookup->identify && !short_form) {
diff = isc_time_microdiff(&query->time_recv, &query->time_sent);
if (query->lookup->use_usec)
printf(";; Received %" PRIu64 " bytes "
"from %s(%s) in %ld us\n\n",
query->lookup->doing_xfr
? query->byte_count
: (uint64_t)bytes,
fromtext, query->userarg, (long) diff);
else
printf(";; Received %" PRIu64 " bytes "
"from %s(%s) in %ld ms\n\n",
query->lookup->doing_xfr
? query->byte_count
: (uint64_t)bytes,
fromtext, query->userarg, (long) diff / 1000);
}
}
/*
* Callback from dighost.c to print that it is trying a server.
* Not used in dig.
* XXX print_trying
*/
static void
trying(char *frm, dig_lookup_t *lookup) {
UNUSED(frm);
UNUSED(lookup);
}
/*%
* Internal print routine used to print short form replies.
*/
static isc_result_t
say_message(dns_rdata_t *rdata, dig_query_t *query, isc_buffer_t *buf) {
isc_result_t result;
uint64_t diff;
char store[sizeof(" in 18446744073709551616 us.")];
unsigned int styleflags = 0;
if (query->lookup->trace || query->lookup->ns_search_only) {
result = dns_rdatatype_totext(rdata->type, buf);
if (result != ISC_R_SUCCESS)
return (result);
ADD_STRING(buf, " ");
}
/* Turn on rrcomments if explicitly enabled */
if (query->lookup->rrcomments > 0)
styleflags |= DNS_STYLEFLAG_RRCOMMENT;
if (query->lookup->nocrypto)
styleflags |= DNS_STYLEFLAG_NOCRYPTO;
if (query->lookup->print_unknown_format)
styleflags |= DNS_STYLEFLAG_UNKNOWNFORMAT;
if (query->lookup->expandaaaa)
styleflags |= DNS_STYLEFLAG_EXPANDAAAA;
result = dns_rdata_tofmttext(rdata, NULL, styleflags, 0,
splitwidth, " ", buf);
if (result == ISC_R_NOSPACE)
return (result);
check_result(result, "dns_rdata_totext");
if (query->lookup->identify) {
diff = isc_time_microdiff(&query->time_recv, &query->time_sent);
ADD_STRING(buf, " from server ");
ADD_STRING(buf, query->servname);
if (query->lookup->use_usec) {
snprintf(store, sizeof(store), " in %" PRIu64 " us.", diff);
} else {
snprintf(store, sizeof(store), " in %" PRIu64 " ms.", diff / 1000);
}
ADD_STRING(buf, store);
}
ADD_STRING(buf, "\n");
return (ISC_R_SUCCESS);
}
/*%
* short_form message print handler. Calls above say_message()
*/
static isc_result_t
short_answer(dns_message_t *msg, dns_messagetextflag_t flags,
isc_buffer_t *buf, dig_query_t *query)
{
dns_name_t *name;
dns_rdataset_t *rdataset;
isc_result_t result, loopresult;
dns_name_t empty_name;
dns_rdata_t rdata = DNS_RDATA_INIT;
UNUSED(flags);
dns_name_init(&empty_name, NULL);
result = dns_message_firstname(msg, DNS_SECTION_ANSWER);
if (result == ISC_R_NOMORE)
return (ISC_R_SUCCESS);
else if (result != ISC_R_SUCCESS)
return (result);
for (;;) {
name = NULL;
dns_message_currentname(msg, DNS_SECTION_ANSWER, &name);
for (rdataset = ISC_LIST_HEAD(name->list);
rdataset != NULL;
rdataset = ISC_LIST_NEXT(rdataset, link)) {
loopresult = dns_rdataset_first(rdataset);
while (loopresult == ISC_R_SUCCESS) {
dns_rdataset_current(rdataset, &rdata);
result = say_message(&rdata, query,
buf);
if (result == ISC_R_NOSPACE)
return (result);
check_result(result, "say_message");
loopresult = dns_rdataset_next(rdataset);
dns_rdata_reset(&rdata);
}
}
result = dns_message_nextname(msg, DNS_SECTION_ANSWER);
if (result == ISC_R_NOMORE)
break;
else if (result != ISC_R_SUCCESS)
return (result);
}
return (ISC_R_SUCCESS);
}
static bool
isdotlocal(dns_message_t *msg) {
isc_result_t result;
static unsigned char local_ndata[] = { "\005local\0" };
static unsigned char local_offsets[] = { 0, 6 };
static dns_name_t local =
DNS_NAME_INITABSOLUTE(local_ndata, local_offsets);
for (result = dns_message_firstname(msg, DNS_SECTION_QUESTION);
result == ISC_R_SUCCESS;
result = dns_message_nextname(msg, DNS_SECTION_QUESTION))
{
dns_name_t *name = NULL;
dns_message_currentname(msg, DNS_SECTION_QUESTION, &name);
if (dns_name_issubdomain(name, &local))
return (true);
}
return (false);
}
/*
* Callback from dighost.c to print the reply from a server
*/
static isc_result_t
printmessage(dig_query_t *query, dns_message_t *msg, bool headers) {
isc_result_t result;
dns_messagetextflag_t flags;
isc_buffer_t *buf = NULL;
unsigned int len = OUTPUTBUF;
dns_master_style_t *style = NULL;
unsigned int styleflags = 0;
styleflags |= DNS_STYLEFLAG_REL_OWNER;
if (query->lookup->comments)
styleflags |= DNS_STYLEFLAG_COMMENT;
if (query->lookup->print_unknown_format)
styleflags |= DNS_STYLEFLAG_UNKNOWNFORMAT;
/* Turn on rrcomments if explicitly enabled */
if (query->lookup->rrcomments > 0)
styleflags |= DNS_STYLEFLAG_RRCOMMENT;
if (query->lookup->ttlunits)
styleflags |= DNS_STYLEFLAG_TTL_UNITS;
if (query->lookup->nottl)
styleflags |= DNS_STYLEFLAG_NO_TTL;
if (query->lookup->noclass)
styleflags |= DNS_STYLEFLAG_NO_CLASS;
if (query->lookup->nocrypto)
styleflags |= DNS_STYLEFLAG_NOCRYPTO;
if (query->lookup->expandaaaa)
styleflags |= DNS_STYLEFLAG_EXPANDAAAA;
if (query->lookup->multiline) {
styleflags |= DNS_STYLEFLAG_OMIT_OWNER;
styleflags |= DNS_STYLEFLAG_OMIT_CLASS;
styleflags |= DNS_STYLEFLAG_REL_DATA;
styleflags |= DNS_STYLEFLAG_OMIT_TTL;
styleflags |= DNS_STYLEFLAG_TTL;
styleflags |= DNS_STYLEFLAG_MULTILINE;
/* Turn on rrcomments unless explicitly disabled */
if (query->lookup->rrcomments >= 0)
styleflags |= DNS_STYLEFLAG_RRCOMMENT;
}
if (query->lookup->multiline ||
(query->lookup->nottl && query->lookup->noclass))
result = dns_master_stylecreate(&style, styleflags,
24, 24, 24, 32, 80, 8,
splitwidth, mctx);
else if (query->lookup->nottl || query->lookup->noclass)
result = dns_master_stylecreate(&style, styleflags,
24, 24, 32, 40, 80, 8,
splitwidth, mctx);
else
result = dns_master_stylecreate(&style, styleflags,
24, 32, 40, 48, 80, 8,
splitwidth, mctx);
check_result(result, "dns_master_stylecreate");
if (query->lookup->cmdline[0] != 0) {
if (!short_form)
fputs(query->lookup->cmdline, stdout);
query->lookup->cmdline[0]=0;
}
debug("printmessage(%s %s %s)", headers ? "headers" : "noheaders",
query->lookup->comments ? "comments" : "nocomments",
short_form ? "short_form" : "long_form");
flags = 0;
if (!headers) {
flags |= DNS_MESSAGETEXTFLAG_NOHEADERS;
flags |= DNS_MESSAGETEXTFLAG_NOCOMMENTS;
}
if (query->lookup->onesoa &&
query->lookup->rdtype == dns_rdatatype_axfr)
flags |= (query->msg_count == 0) ? DNS_MESSAGETEXTFLAG_ONESOA :
DNS_MESSAGETEXTFLAG_OMITSOA;
if (!query->lookup->comments)
flags |= DNS_MESSAGETEXTFLAG_NOCOMMENTS;
result = isc_buffer_allocate(mctx, &buf, len);
check_result(result, "isc_buffer_allocate");
if (query->lookup->comments && !short_form) {
if (query->lookup->cmdline[0] != 0)
printf("; %s\n", query->lookup->cmdline);
if (msg == query->lookup->sendmsg)
printf(";; Sending:\n");
else
printf(";; Got answer:\n");
if (headers) {
if (isdotlocal(msg)) {
printf(";; WARNING: .local is reserved for "
"Multicast DNS\n;; You are currently "
"testing what happens when an mDNS "
"query is leaked to DNS\n");
}
printf(";; ->>HEADER<<- opcode: %s, status: %s, "
"id: %u\n",
opcodetext[msg->opcode],
rcode_totext(msg->rcode),
msg->id);
printf(";; flags:");
if ((msg->flags & DNS_MESSAGEFLAG_QR) != 0)
printf(" qr");
if ((msg->flags & DNS_MESSAGEFLAG_AA) != 0)
printf(" aa");
if ((msg->flags & DNS_MESSAGEFLAG_TC) != 0)
printf(" tc");
if ((msg->flags & DNS_MESSAGEFLAG_RD) != 0)
printf(" rd");
if ((msg->flags & DNS_MESSAGEFLAG_RA) != 0)
printf(" ra");
if ((msg->flags & DNS_MESSAGEFLAG_AD) != 0)
printf(" ad");
if ((msg->flags & DNS_MESSAGEFLAG_CD) != 0)
printf(" cd");
if ((msg->flags & 0x0040U) != 0)
printf("; MBZ: 0x4");
printf("; QUERY: %u, ANSWER: %u, "
"AUTHORITY: %u, ADDITIONAL: %u\n",
msg->counts[DNS_SECTION_QUESTION],
msg->counts[DNS_SECTION_ANSWER],
msg->counts[DNS_SECTION_AUTHORITY],
msg->counts[DNS_SECTION_ADDITIONAL]);
if (msg != query->lookup->sendmsg &&
(msg->flags & DNS_MESSAGEFLAG_RD) != 0 &&
(msg->flags & DNS_MESSAGEFLAG_RA) == 0)
printf(";; WARNING: recursion requested "
"but not available\n");
}
if (msg != query->lookup->sendmsg &&
query->lookup->edns != -1 && msg->opt == NULL &&
(msg->rcode == dns_rcode_formerr ||
msg->rcode == dns_rcode_notimp))
printf("\n;; WARNING: EDNS query returned status "
"%s - retry with '%s+noedns'\n",
rcode_totext(msg->rcode),
query->lookup->dnssec ? "+nodnssec ": "");
if (msg != query->lookup->sendmsg && extrabytes != 0U)
printf(";; WARNING: Message has %u extra byte%s at "
"end\n", extrabytes, extrabytes != 0 ? "s" : "");
}
repopulate_buffer:
if (query->lookup->comments && headers && !short_form) {
result = dns_message_pseudosectiontotext(msg,
DNS_PSEUDOSECTION_OPT,
style, flags, buf);
if (result == ISC_R_NOSPACE) {
buftoosmall:
len += OUTPUTBUF;
isc_buffer_free(&buf);
result = isc_buffer_allocate(mctx, &buf, len);
if (result == ISC_R_SUCCESS)
goto repopulate_buffer;
else
goto cleanup;
}
check_result(result,
"dns_message_pseudosectiontotext");
}
if (query->lookup->section_question && headers) {
if (!short_form) {
result = dns_message_sectiontotext(msg,
DNS_SECTION_QUESTION,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result, "dns_message_sectiontotext");
}
}
if (query->lookup->section_answer) {
if (!short_form) {
result = dns_message_sectiontotext(msg,
DNS_SECTION_ANSWER,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result, "dns_message_sectiontotext");
} else {
result = short_answer(msg, flags, buf, query);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result, "short_answer");
}
}
if (query->lookup->section_authority) {
if (!short_form) {
result = dns_message_sectiontotext(msg,
DNS_SECTION_AUTHORITY,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result, "dns_message_sectiontotext");
}
}
if (query->lookup->section_additional) {
if (!short_form) {
result = dns_message_sectiontotext(msg,
DNS_SECTION_ADDITIONAL,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result, "dns_message_sectiontotext");
/*
* Only print the signature on the first record.
*/
if (headers) {
result = dns_message_pseudosectiontotext(
msg,
DNS_PSEUDOSECTION_TSIG,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result,
"dns_message_pseudosectiontotext");
result = dns_message_pseudosectiontotext(
msg,
DNS_PSEUDOSECTION_SIG0,
style, flags, buf);
if (result == ISC_R_NOSPACE)
goto buftoosmall;
check_result(result,
"dns_message_pseudosectiontotext");
}
}
}
if (headers && query->lookup->comments && !short_form)
printf("\n");
printf("%.*s", (int)isc_buffer_usedlength(buf),
(char *)isc_buffer_base(buf));
isc_buffer_free(&buf);
cleanup:
if (style != NULL)
dns_master_styledestroy(&style, mctx);
return (result);
}
/*%
* print the greeting message when the program first starts up.
*/
static void
printgreeting(int argc, char **argv, dig_lookup_t *lookup) {
int i;
static bool first = true;
char append[MXNAME];
if (printcmd) {
snprintf(lookup->cmdline, sizeof(lookup->cmdline),
"%s; <<>> DiG " VERSION " <<>>",
first?"\n":"");
i = 1;
while (i < argc) {
snprintf(append, sizeof(append), " %s", argv[i++]);
strlcat(lookup->cmdline, append,
sizeof(lookup->cmdline));
}
strlcat(lookup->cmdline, "\n", sizeof(lookup->cmdline));
if (first && addresscount != 0) {
snprintf(append, sizeof(append),
"; (%d server%s found)\n",
addresscount,
addresscount > 1 ? "s" : "");
strlcat(lookup->cmdline, append,
sizeof(lookup->cmdline));
}
if (first) {
snprintf(append, sizeof(append),
";; global options:%s%s\n",
short_form ? " +short" : "",
printcmd ? " +cmd" : "");
first = false;
strlcat(lookup->cmdline, append,
sizeof(lookup->cmdline));
}
}
}
/*%
* We're not using isc_commandline_parse() here since the command line
* syntax of dig is quite a bit different from that which can be described
* by that routine.
* XXX doc options
*/
static void
plus_option(char *option, bool is_batchfile,
dig_lookup_t *lookup)
{
isc_result_t result;
char *cmd, *value, *last = NULL, *code, *extra;
uint32_t num;
bool state = true;
size_t n;
INSIST(option != NULL);
if ((cmd = strtok_r(option, "=", &last)) == NULL) {
printf(";; Invalid option %s\n", option);
return;
}
if (strncasecmp(cmd, "no", 2)==0) {
cmd += 2;
state = false;
}
/* parse the rest of the string */
value = strtok_r(NULL, "", &last);
#define FULLCHECK(A) \
do { \
size_t _l = strlen(cmd); \
if (_l >= sizeof(A) || strncasecmp(cmd, A, _l) != 0) \
goto invalid_option; \
} while (0)
#define FULLCHECK2(A, B) \
do { \
size_t _l = strlen(cmd); \
if ((_l >= sizeof(A) || strncasecmp(cmd, A, _l) != 0) && \
(_l >= sizeof(B) || strncasecmp(cmd, B, _l) != 0)) \
goto invalid_option; \
} while (0)
switch (cmd[0]) {
case 'a':
switch (cmd[1]) {
case 'a': /* aaonly / aaflag */
FULLCHECK2("aaonly", "aaflag");
lookup->aaonly = state;
break;
case 'd':
switch (cmd[2]) {
case 'd': /* additional */
FULLCHECK("additional");
lookup->section_additional = state;
break;
case 'f': /* adflag */
case '\0': /* +ad is a synonym for +adflag */
FULLCHECK("adflag");
lookup->adflag = state;
break;
default:
goto invalid_option;
}
break;
case 'l': /* all */
FULLCHECK("all");
lookup->section_question = state;
lookup->section_authority = state;
lookup->section_answer = state;
lookup->section_additional = state;
lookup->comments = state;
lookup->stats = state;
printcmd = state;
break;
case 'n': /* answer */
FULLCHECK("answer");
lookup->section_answer = state;
break;
case 'u': /* authority */
FULLCHECK("authority");
lookup->section_authority = state;
break;
default:
goto invalid_option;
}
break;
case 'b':
switch (cmd[1]) {
case 'a':/* badcookie */
FULLCHECK("badcookie");
lookup->badcookie = state;
break;
case 'e':/* besteffort */
FULLCHECK("besteffort");
lookup->besteffort = state;
break;
case 'u':/* bufsize */
FULLCHECK("bufsize");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
result = parse_uint(&num, value, COMMSIZE,
"buffer size");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse buffer size");
goto exit_or_usage;
}
lookup->udpsize = num;
break;
default:
goto invalid_option;
}
break;
case 'c':
switch (cmd[1]) {
case 'd':/* cdflag */
switch (cmd[2]) {
case 'f': /* cdflag */
case '\0': /* +cd is a synonym for +cdflag */
FULLCHECK("cdflag");
lookup->cdflag = state;
break;
default:
goto invalid_option;
}
break;
case 'l': /* class */
/* keep +cl for backwards compatibility */
FULLCHECK2("cl", "class");
lookup->noclass = !state;
break;
case 'm': /* cmd */
FULLCHECK("cmd");
printcmd = state;
break;
case 'o': /* comments */
switch (cmd[2]) {
case 'm':
FULLCHECK("comments");
lookup->comments = state;
if (lookup == default_lookup)
pluscomm = state;
break;
case 'o': /* cookie */
FULLCHECK("cookie");
if (state && lookup->edns == -1)
lookup->edns = 0;
lookup->sendcookie = state;
if (value != NULL) {
n = strlcpy(hexcookie, value,
sizeof(hexcookie));
if (n >= sizeof(hexcookie)) {
warn("COOKIE data too large");
goto exit_or_usage;
}
lookup->cookie = hexcookie;
} else
lookup->cookie = NULL;
break;
default:
goto invalid_option;
}
break;
case 'r':
FULLCHECK("crypto");
lookup->nocrypto = !state;
break;
default:
goto invalid_option;
}
break;
case 'd':
switch (cmd[1]) {
case 'e': /* defname */
FULLCHECK("defname");
if (!lookup->trace) {
usesearch = state;
}
break;
case 'n': /* dnssec */
FULLCHECK("dnssec");
dnssec:
if (state && lookup->edns == -1)
lookup->edns = 0;
lookup->dnssec = state;
break;
case 'o': /* domain ... but treat "do" as synonym for dnssec */
if (cmd[2] == '\0')
goto dnssec;
FULLCHECK("domain");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
strlcpy(domainopt, value, sizeof(domainopt));
break;
case 's': /* dscp */
FULLCHECK("dscp");
if (!state) {
lookup->dscp = -1;
break;
}
if (value == NULL)
goto need_value;
result = parse_uint(&num, value, 0x3f, "DSCP");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse DSCP value");
goto exit_or_usage;
}
lookup->dscp = num;
break;
default:
goto invalid_option;
}
break;
case 'e':
switch (cmd[1]) {
case 'd':
switch(cmd[2]) {
case 'n':
switch (cmd[3]) {
case 's':
switch (cmd[4]) {
case 0:
FULLCHECK("edns");
if (!state) {
lookup->edns = -1;
break;
}
if (value == NULL) {
lookup->edns = 0;
break;
}
result = parse_uint(&num,
value,
255,
"edns");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse "
"edns");
goto exit_or_usage;
}
lookup->edns = num;
break;
case 'f':
FULLCHECK("ednsflags");
if (!state) {
lookup->ednsflags = 0;
break;
}
if (value == NULL) {
lookup->ednsflags = 0;
break;
}
result = parse_xint(&num,
value,
0xffff,
"ednsflags");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse "
"ednsflags");
goto exit_or_usage;
}
lookup->ednsflags = num;
break;
case 'n':
FULLCHECK("ednsnegotiation");
lookup->ednsneg = state;
break;
case 'o':
FULLCHECK("ednsopt");
if (!state) {
lookup->ednsoptscnt = 0;
break;
}
code = NULL;
if (value != NULL) {
code = strtok_r(value,
":",
&last);
}
if (code == NULL) {
warn("ednsopt no "
"code point "
"specified");
goto exit_or_usage;
}
extra = strtok_r(NULL, "\0",
&last);
save_opt(lookup, code, extra);
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'x':
switch (cmd[2]) {
case 'p':
switch(cmd[3]) {
case 'a':
FULLCHECK("expandaaaa");
lookup->expandaaaa = state;
break;
case 'i':
FULLCHECK("expire");
lookup->expire = state;
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'f': /* fail */
FULLCHECK("fail");
lookup->servfail_stops = state;
break;
case 'h':
FULLCHECK("header-only");
lookup->header_only = state;
break;
case 'i':
switch (cmd[1]) {
case 'd': /* identify */
switch (cmd[2]) {
case 'e':
FULLCHECK("identify");
lookup->identify = state;
break;
case 'n':
switch (cmd[3]) {
case 'i':
FULLCHECK("idnin");
#ifndef HAVE_LIBIDN2
fprintf(stderr, ";; IDN input support"
" not enabled\n");
#else
lookup->idnin = state;
#endif
break;
case 'o':
FULLCHECK("idnout");
#ifndef HAVE_LIBIDN2
fprintf(stderr, ";; IDN output support"
" not enabled\n");
#else
lookup->idnout = state;
#endif
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'g': /* ignore */
default: /*
* Inherits default for compatibility (+[no]i*).
*/
FULLCHECK("ignore");
lookup->ignore = state;
}
break;
case 'k':
switch (cmd[1]) {
case 'e':
switch (cmd[2]) {
case 'e':
switch (cmd[3]) {
case 'p':
switch (cmd[4]) {
case 'a':
FULLCHECK("keepalive");
lookup->tcp_keepalive = state;
break;
case 'o':
FULLCHECK("keepopen");
keep_open = state;
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'm': /* multiline */
switch (cmd[1]) {
case 'a':
FULLCHECK("mapped");
lookup->mapped = state;
break;
case 'u':
FULLCHECK("multiline");
lookup->multiline = state;
break;
default:
goto invalid_option;
}
break;
case 'n':
switch (cmd[1]) {
case 'd': /* ndots */
FULLCHECK("ndots");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
result = parse_uint(&num, value, MAXNDOTS, "ndots");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse ndots");
goto exit_or_usage;
}
ndots = num;
break;
case 's':
switch (cmd[2]) {
case 'i': /* nsid */
FULLCHECK("nsid");
if (state && lookup->edns == -1)
lookup->edns = 0;
lookup->nsid = state;
break;
case 's': /* nssearch */
FULLCHECK("nssearch");
lookup->ns_search_only = state;
if (state) {
lookup->trace_root = true;
lookup->recurse = true;
lookup->identify = true;
lookup->stats = false;
lookup->comments = false;
lookup->section_additional = false;
lookup->section_authority = false;
lookup->section_question = false;
lookup->rdtype = dns_rdatatype_ns;
lookup->rdtypeset = true;
short_form = true;
lookup->rrcomments = 0;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'o':
switch (cmd[1]) {
case 'n':
FULLCHECK("onesoa");
lookup->onesoa = state;
break;
case 'p':
FULLCHECK("opcode");
if (!state) {
lookup->opcode = 0; /* default - query */
break;
}
if (value == NULL)
goto need_value;
for (num = 0;
num < sizeof(opcodetext)/sizeof(opcodetext[0]);
num++) {
if (strcasecmp(opcodetext[num], value) == 0)
break;
}
if (num < 16) {
lookup->opcode = (dns_opcode_t)num;
break;
}
result = parse_uint(&num, value, 15, "opcode");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse opcode");
goto exit_or_usage;
}
lookup->opcode = (dns_opcode_t)num;
break;
default:
goto invalid_option;
}
break;
case 'p':
FULLCHECK("padding");
if (state && lookup->edns == -1)
lookup->edns = 0;
if (value == NULL)
goto need_value;
result = parse_uint(&num, value, 512, "padding");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse padding");
goto exit_or_usage;
}
lookup->padding = (uint16_t)num;
break;
case 'q':
switch (cmd[1]) {
case 'r': /* qr */
FULLCHECK("qr");
lookup->qr = state;
break;
case 'u': /* question */
FULLCHECK("question");
lookup->section_question = state;
if (lookup == default_lookup)
plusquest = state;
break;
default:
goto invalid_option;
}
break;
case 'r':
switch (cmd[1]) {
case 'a': /* raflag */
FULLCHECK("raflag");
lookup->raflag = state;
break;
case 'd': /* rdflag */
FULLCHECK("rdflag");
lookup->recurse = state;
break;
case 'e':
switch (cmd[2]) {
case 'c': /* recurse */
FULLCHECK("recurse");
lookup->recurse = state;
break;
case 't': /* retry / retries */
FULLCHECK2("retry", "retries");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
result = parse_uint(&lookup->retries, value,
MAXTRIES - 1, "retries");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse retries");
goto exit_or_usage;
}
lookup->retries++;
break;
default:
goto invalid_option;
}
break;
case 'r': /* rrcomments */
FULLCHECK("rrcomments");
lookup->rrcomments = state ? 1 : -1;
break;
default:
goto invalid_option;
}
break;
case 's':
switch (cmd[1]) {
case 'e': /* search */
FULLCHECK("search");
if (!lookup->trace) {
usesearch = state;
}
break;
case 'h':
if (cmd[2] != 'o')
goto invalid_option;
switch (cmd[3]) {
case 'r': /* short */
FULLCHECK("short");
short_form = state;
if (state) {
printcmd = false;
lookup->section_additional = false;
lookup->section_answer = true;
lookup->section_authority = false;
lookup->section_question = false;
lookup->comments = false;
lookup->stats = false;
lookup->rrcomments = -1;
}
break;
case 'w': /* showsearch */
FULLCHECK("showsearch");
if (!lookup->trace) {
showsearch = state;
usesearch = state;
}
break;
default:
goto invalid_option;
}
break;
case 'i': /* sigchase */
FULLCHECK("sigchase");
fprintf(stderr, ";; +sigchase option is deprecated");
break;
case 'p': /* split */
FULLCHECK("split");
if (value != NULL && !state)
goto invalid_option;
if (!state) {
splitwidth = 0;
break;
} else if (value == NULL)
break;
result = parse_uint(&splitwidth, value,
1023, "split");
if ((splitwidth % 4) != 0U) {
splitwidth = ((splitwidth + 3) / 4) * 4;
fprintf(stderr, ";; Warning, split must be "
"a multiple of 4; adjusting "
"to %u\n", splitwidth);
}
/*
* There is an adjustment done in the
* totext_<rrtype>() functions which causes
* splitwidth to shrink. This is okay when we're
* using the default width but incorrect in this
* case, so we correct for it
*/
if (splitwidth)
splitwidth += 3;
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse split");
goto exit_or_usage;
}
break;
case 't': /* stats */
FULLCHECK("stats");
lookup->stats = state;
break;
case 'u': /* subnet */
FULLCHECK("subnet");
if (state && value == NULL)
goto need_value;
if (!state) {
if (lookup->ecs_addr != NULL) {
isc_mem_free(mctx, lookup->ecs_addr);
lookup->ecs_addr = NULL;
}
break;
}
if (lookup->edns == -1)
lookup->edns = 0;
if (lookup->ecs_addr != NULL) {
isc_mem_free(mctx, lookup->ecs_addr);
lookup->ecs_addr = NULL;
}
result = parse_netprefix(&lookup->ecs_addr, value);
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse client");
goto exit_or_usage;
}
break;
default:
goto invalid_option;
}
break;
case 't':
switch (cmd[1]) {
case 'c': /* tcp */
switch (cmd[2]) {
case 'f':
FULLCHECK("tcflag");
lookup->tcflag = state;
break;
case 'p':
FULLCHECK("tcp");
if (!is_batchfile) {
lookup->tcp_mode = state;
lookup->tcp_mode_set = true;
}
break;
default:
goto invalid_option;
}
break;
case 'i': /* timeout */
FULLCHECK("timeout");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
result = parse_uint(&timeout, value, MAXTIMEOUT,
"timeout");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse timeout");
goto exit_or_usage;
}
if (timeout == 0)
timeout = 1;
break;
case 'o':
FULLCHECK("topdown");
fprintf(stderr, ";; +topdown option is deprecated");
break;
case 'r':
switch (cmd[2]) {
case 'a': /* trace */
FULLCHECK("trace");
lookup->trace = state;
lookup->trace_root = state;
if (state) {
lookup->recurse = true;
lookup->identify = true;
lookup->comments = false;
lookup->rrcomments = 0;
lookup->stats = false;
lookup->section_additional = false;
lookup->section_authority = true;
lookup->section_question = false;
lookup->dnssec = true;
lookup->sendcookie = true;
usesearch = false;
}
break;
case 'i': /* tries */
FULLCHECK("tries");
if (value == NULL)
goto need_value;
if (!state)
goto invalid_option;
result = parse_uint(&lookup->retries, value,
MAXTRIES, "tries");
if (result != ISC_R_SUCCESS) {
warn("Couldn't parse tries");
goto exit_or_usage;
}
if (lookup->retries == 0)
lookup->retries = 1;
break;
case 'u': /* trusted-key */
FULLCHECK("trusted-key");
fprintf(stderr, ";; +trusted-key option is "
"deprecated");
break;
default:
goto invalid_option;
}
break;
case 't':
switch (cmd[2]) {
case 'l':
switch (cmd[3]) {
case 0:
case 'i': /* ttlid */
FULLCHECK2("ttl", "ttlid");
lookup->nottl = !state;
break;
case 'u': /* ttlunits */
FULLCHECK("ttlunits");
lookup->nottl = false;
lookup->ttlunits = state;
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
default:
goto invalid_option;
}
break;
case 'u':
FULLCHECK("unknownformat");
lookup->print_unknown_format = state;
break;
case 'v':
FULLCHECK("vc");
if (!is_batchfile) {
lookup->tcp_mode = state;
lookup->tcp_mode_set = true;
}
break;
case 'z': /* zflag */
FULLCHECK("zflag");
lookup->zflag = state;
break;
default:
invalid_option:
need_value:
#if TARGET_OS_IPHONE
exit_or_usage:
#endif
fprintf(stderr, "Invalid option: +%s\n",
option);
usage();
}
return;
#if ! TARGET_OS_IPHONE
exit_or_usage:
digexit();
#endif
}
/*%
* #true returned if value was used
*/
static const char *single_dash_opts = "46dhimnruv";
static const char *dash_opts = "46bcdfhikmnpqrtvyx";
static bool
dash_option(char *option, char *next, dig_lookup_t **lookup,
bool *open_type_class, bool *need_clone,
bool config_only, int argc, char **argv,
bool *firstarg)
{
char opt, *value, *ptr, *ptr2, *ptr3, *last;
isc_result_t result;
bool value_from_next;
isc_textregion_t tr;
dns_rdatatype_t rdtype;
dns_rdataclass_t rdclass;
char textname[MXNAME];
struct in_addr in4;
struct in6_addr in6;
in_port_t srcport;
char *hash, *cmd;
uint32_t num;
while (strpbrk(option, single_dash_opts) == &option[0]) {
/*
* Since the -[46dhimnuv] options do not take an argument,
* account for them (in any number and/or combination)
* if they appear as the first character(s) of a q-opt.
*/
opt = option[0];
switch (opt) {
case '4':
if (have_ipv4) {
isc_net_disableipv6();
have_ipv6 = false;
} else {
fatal("can't find IPv4 networking");
/* NOTREACHED */
return (false);
}
break;
case '6':
if (have_ipv6) {
isc_net_disableipv4();
have_ipv4 = false;
} else {
fatal("can't find IPv6 networking");
/* NOTREACHED */
return (false);
}
break;
case 'd':
ptr = strpbrk(&option[1], dash_opts);
if (ptr != &option[1]) {
cmd = option;
FULLCHECK("debug");
debugging = true;
return (false);
} else
debugging = true;
break;
case 'h':
help();
exit(0);
break;
case 'i':
/* deprecated */
break;
case 'm': /* memdebug */
/* memdebug is handled in preparse_args() */
break;
case 'n':
/* deprecated */
break;
case 'r':
debug("digrc (late)");
digrc = false;
break;
case 'u':
(*lookup)->use_usec = true;
break;
case 'v':
version();
exit(0);
break;
}
if (strlen(option) > 1U)
option = &option[1];
else
return (false);
}
opt = option[0];
if (strlen(option) > 1U) {
value_from_next = false;
value = &option[1];
} else {
value_from_next = true;
value = next;
}
if (value == NULL)
goto invalid_option;
switch (opt) {
case 'b':
hash = strchr(value, '#');
if (hash != NULL) {
result = parse_uint(&num, hash + 1, MAXPORT,
"port number");
if (result != ISC_R_SUCCESS)
fatal("Couldn't parse port number");
srcport = num;
*hash = '\0';
} else
srcport = 0;
if (have_ipv6 && inet_pton(AF_INET6, value, &in6) == 1) {
isc_sockaddr_fromin6(&bind_address, &in6, srcport);
isc_net_disableipv4();
} else if (have_ipv4 && inet_pton(AF_INET, value, &in4) == 1) {
isc_sockaddr_fromin(&bind_address, &in4, srcport);
isc_net_disableipv6();
} else {
if (hash != NULL)
*hash = '#';
fatal("invalid address %s", value);
}
if (hash != NULL)
*hash = '#';
specified_source = true;
return (value_from_next);
case 'c':
if ((*lookup)->rdclassset) {
fprintf(stderr, ";; Warning, extra class option\n");
}
*open_type_class = false;
tr.base = value;
tr.length = (unsigned int) strlen(value);
result = dns_rdataclass_fromtext(&rdclass,
(isc_textregion_t *)&tr);
if (result == ISC_R_SUCCESS) {
(*lookup)->rdclass = rdclass;
(*lookup)->rdclassset = true;
} else
fprintf(stderr, ";; Warning, ignoring "
"invalid class %s\n",
value);
return (value_from_next);
case 'f':
batchname = value;
return (value_from_next);
case 'k':
strlcpy(keyfile, value, sizeof(keyfile));
return (value_from_next);
case 'p':
result = parse_uint(&num, value, MAXPORT, "port number");
if (result != ISC_R_SUCCESS)
fatal("Couldn't parse port number");
port = num;
return (value_from_next);
case 'q':
if (!config_only) {
if (*need_clone)
(*lookup) = clone_lookup(default_lookup,
true);
*need_clone = true;
strlcpy((*lookup)->textname, value,
sizeof((*lookup)->textname));
(*lookup)->trace_root = ((*lookup)->trace ||
(*lookup)->ns_search_only);
(*lookup)->new_search = true;
if (*firstarg) {
printgreeting(argc, argv, *lookup);
*firstarg = false;
}
ISC_LIST_APPEND(lookup_list, (*lookup), link);
debug("looking up %s", (*lookup)->textname);
}
return (value_from_next);
case 't':
*open_type_class = false;
if (strncasecmp(value, "ixfr=", 5) == 0) {
rdtype = dns_rdatatype_ixfr;
result = ISC_R_SUCCESS;
} else {
tr.base = value;
tr.length = (unsigned int) strlen(value);
result = dns_rdatatype_fromtext(&rdtype,
(isc_textregion_t *)&tr);
if (result == ISC_R_SUCCESS &&
rdtype == dns_rdatatype_ixfr) {
result = DNS_R_UNKNOWN;
}
}
if (result == ISC_R_SUCCESS) {
if ((*lookup)->rdtypeset) {
fprintf(stderr, ";; Warning, "
"extra type option\n");
}
if (rdtype == dns_rdatatype_ixfr) {
uint32_t serial;
(*lookup)->rdtype = dns_rdatatype_ixfr;
(*lookup)->rdtypeset = true;
result = parse_uint(&serial, &value[5],
MAXSERIAL, "serial number");
if (result != ISC_R_SUCCESS)
fatal("Couldn't parse serial number");
(*lookup)->ixfr_serial = serial;
(*lookup)->section_question = plusquest;
(*lookup)->comments = pluscomm;
if (!(*lookup)->tcp_mode_set)
(*lookup)->tcp_mode = true;
} else {
(*lookup)->rdtype = rdtype;
if (!config_only)
(*lookup)->rdtypeset = true;
if (rdtype == dns_rdatatype_axfr) {
(*lookup)->section_question = plusquest;
(*lookup)->comments = pluscomm;
} else if (rdtype == dns_rdatatype_any) {
if (!(*lookup)->tcp_mode_set)
(*lookup)->tcp_mode = true;
}
(*lookup)->ixfr_serial = false;
}
} else
fprintf(stderr, ";; Warning, ignoring "
"invalid type %s\n",
value);
return (value_from_next);
case 'y':
if ((ptr = strtok_r(value, ":", &last)) == NULL) {
usage();
}
if ((ptr2 = strtok_r(NULL, ":", &last)) == NULL) { /* name or secret */
usage();
}
if ((ptr3 = strtok_r(NULL, ":", &last)) != NULL) { /* secret or NULL */
parse_hmac(ptr);
ptr = ptr2;
ptr2 = ptr3;
} else {
hmacname = DNS_TSIG_HMACMD5_NAME;
digestbits = 0;
}
/* XXXONDREJ: FIXME */
strlcpy(keynametext, ptr, sizeof(keynametext));
strlcpy(keysecret, ptr2, sizeof(keysecret));
return (value_from_next);
case 'x':
if (*need_clone)
*lookup = clone_lookup(default_lookup, true);
*need_clone = true;
if (get_reverse(textname, sizeof(textname), value,
false) == ISC_R_SUCCESS) {
strlcpy((*lookup)->textname, textname,
sizeof((*lookup)->textname));
debug("looking up %s", (*lookup)->textname);
(*lookup)->trace_root = ((*lookup)->trace ||
(*lookup)->ns_search_only);
if (!(*lookup)->rdtypeset)
(*lookup)->rdtype = dns_rdatatype_ptr;
if (!(*lookup)->rdclassset)
(*lookup)->rdclass = dns_rdataclass_in;
(*lookup)->new_search = true;
if (*firstarg) {
printgreeting(argc, argv, *lookup);
*firstarg = false;
}
ISC_LIST_APPEND(lookup_list, *lookup, link);
} else {
fprintf(stderr, "Invalid IP address %s\n", value);
exit(1);
}
return (value_from_next);
invalid_option:
default:
fprintf(stderr, "Invalid option: -%s\n", option);
usage();
}
/* NOTREACHED */
return (false);
}
/*%
* Because we may be trying to do memory allocation recording, we're going
* to need to parse the arguments for the -m *before* we start the main
* argument parsing routine.
*
* I'd prefer not to have to do this, but I am not quite sure how else to
* fix the problem. Argument parsing in dig involves memory allocation
* by its nature, so it can't be done in the main argument parser.
*/
static void
preparse_args(int argc, char **argv) {
int rc;
char **rv;
char *option;
rc = argc;
rv = argv;
for (rc--, rv++; rc > 0; rc--, rv++) {
if (rv[0][0] != '-')
continue;
option = &rv[0][1];
while (strpbrk(option, single_dash_opts) == &option[0]) {
switch (option[0]) {
case 'd':
/* For debugging early startup */
debugging = true;
break;
case 'm':
memdebugging = true;
isc_mem_debugging = ISC_MEM_DEBUGTRACE |
ISC_MEM_DEBUGRECORD;
break;
case 'r':
/*
* Must be done early, because ~/.digrc
* is read before command line parsing
*/
debug("digrc (early)");
digrc = false;
break;
case '4':
if (ipv6only)
fatal("only one of -4 and -6 allowed");
ipv4only = true;
break;
case '6':
if (ipv4only)
fatal("only one of -4 and -6 allowed");
ipv6only = true;
break;
}
option = &option[1];
}
if (strlen(option) == 0U) {
continue;
}
/* Look for dash value option. */
if (strpbrk(option, dash_opts) != &option[0] ||
strlen(option) > 1U) {
/* Error or value in option. */
continue;
}
/* Dash value is next argument so we need to skip it. */
rc--, rv++;
/* Handle missing argument */
if (rc == 0)
break;
}
}
static int
split_batchline(char *batchline, char **bargv, int len, const char *msg) {
int bargc;
char *last = NULL;
REQUIRE(batchline != NULL);
for (bargc = 1, bargv[bargc] = strtok_r(batchline, " \t\r\n", &last);
bargc < len && bargv[bargc];
bargv[++bargc] = strtok_r(NULL, " \t\r\n", &last))
{
debug("%s %d: %s", msg, bargc, bargv[bargc]);
}
return (bargc);
}
static void
parse_args(bool is_batchfile, bool config_only,
int argc, char **argv)
{
isc_result_t result;
isc_textregion_t tr;
bool firstarg = true;
dig_lookup_t *lookup = NULL;
dns_rdatatype_t rdtype;
dns_rdataclass_t rdclass;
bool open_type_class = true;
char batchline[MXNAME];
int bargc;
char *bargv[64];
int rc;
char **rv;
#ifndef NOPOSIX
char *homedir;
char rcfile[PATH_MAX];
#endif
bool need_clone = true;
/*
* The semantics for parsing the args is a bit complex; if
* we don't have a host yet, make the arg apply globally,
* otherwise make it apply to the latest host. This is
* a bit different than the previous versions, but should
* form a consistent user interface.
*
* First, create a "default lookup" which won't actually be used
* anywhere, except for cloning into new lookups
*/
debug("parse_args()");
if (!is_batchfile) {
debug("making new lookup");
default_lookup = make_empty_lookup();
default_lookup->adflag = true;
default_lookup->edns = 0;
default_lookup->sendcookie = true;
#ifndef NOPOSIX
/*
* Treat ${HOME}/.digrc as a special batchfile
*/
INSIST(batchfp == NULL);
homedir = getenv("HOME");
if (homedir != NULL && digrc) {
unsigned int n;
debug("digrc (open)");
n = snprintf(rcfile, sizeof(rcfile), "%s/.digrc",
homedir);
if (n < sizeof(rcfile)) {
batchfp = fopen(rcfile, "r");
}
}
if (batchfp != NULL) {
while (fgets(batchline, sizeof(batchline),
batchfp) != 0)
{
debug("config line %s", batchline);
bargc = split_batchline(batchline, bargv, 62,
".digrc argv");
bargv[0] = argv[0];
argv0 = argv[0];
parse_args(true, true,
bargc, (char **)bargv);
}
fclose(batchfp);
}
#endif
}
if (is_batchfile && !config_only) {
/* Processing '-f batchfile'. */
lookup = clone_lookup(default_lookup, true);
need_clone = false;
} else {
lookup = default_lookup;
}
rc = argc;
rv = argv;
for (rc--, rv++; rc > 0; rc--, rv++) {
debug("main parsing %s", rv[0]);
if (strncmp(rv[0], "%", 1) == 0)
break;
if (rv[0][0] == '@') {
if (is_batchfile && !config_only) {
addresscount = getaddresses(lookup, &rv[0][1],
&result);
if (addresscount == 0) {
fprintf(stderr, "couldn't get address "
"for '%s': %s: skipping "
"lookup\n", &rv[0][1],
isc_result_totext(result));
if (ISC_LINK_LINKED(lookup, link))
ISC_LIST_DEQUEUE(lookup_list,
lookup, link);
destroy_lookup(lookup);
return;
}
} else {
addresscount = getaddresses(lookup, &rv[0][1],
NULL);
if (addresscount == 0)
fatal("no valid addresses for '%s'\n",
&rv[0][1]);
}
} else if (rv[0][0] == '+') {
plus_option(&rv[0][1], is_batchfile,
lookup);
} else if (rv[0][0] == '-') {
if (rc <= 1) {
if (dash_option(&rv[0][1], NULL,
&lookup, &open_type_class,
&need_clone, config_only,
argc, argv, &firstarg)) {
rc--;
rv++;
}
} else {
if (dash_option(&rv[0][1], rv[1],
&lookup, &open_type_class,
&need_clone, config_only,
argc, argv, &firstarg)) {
rc--;
rv++;
}
}
} else {
/*
* Anything which isn't an option
*/
if (open_type_class) {
if (strncasecmp(rv[0], "ixfr=", 5) == 0) {
rdtype = dns_rdatatype_ixfr;
result = ISC_R_SUCCESS;
} else {
tr.base = rv[0];
tr.length =
(unsigned int) strlen(rv[0]);
result = dns_rdatatype_fromtext(&rdtype,
(isc_textregion_t *)&tr);
if (result == ISC_R_SUCCESS &&
rdtype == dns_rdatatype_ixfr) {
fprintf(stderr, ";; Warning, "
"ixfr requires a "
"serial number\n");
continue;
}
}
if (result == ISC_R_SUCCESS) {
if (lookup->rdtypeset) {
fprintf(stderr, ";; Warning, "
"extra type option\n");
}
if (rdtype == dns_rdatatype_ixfr) {
uint32_t serial;
lookup->rdtype =
dns_rdatatype_ixfr;
lookup->rdtypeset = true;
result = parse_uint(&serial,
&rv[0][5],
MAXSERIAL,
"serial number");
if (result != ISC_R_SUCCESS)
fatal("Couldn't parse "
"serial number");
lookup->ixfr_serial = serial;
lookup->section_question =
plusquest;
lookup->comments = pluscomm;
if (!lookup->tcp_mode_set)
lookup->tcp_mode = true;
} else {
lookup->rdtype = rdtype;
lookup->rdtypeset = true;
if (rdtype ==
dns_rdatatype_axfr) {
lookup->section_question =
plusquest;
lookup->comments = pluscomm;
}
if (rdtype ==
dns_rdatatype_any &&
!lookup->tcp_mode_set)
lookup->tcp_mode = true;
lookup->ixfr_serial = false;
}
continue;
}
result = dns_rdataclass_fromtext(&rdclass,
(isc_textregion_t *)&tr);
if (result == ISC_R_SUCCESS) {
if (lookup->rdclassset) {
fprintf(stderr, ";; Warning, "
"extra class option\n");
}
lookup->rdclass = rdclass;
lookup->rdclassset = true;
continue;
}
}
if (!config_only) {
if (need_clone)
lookup = clone_lookup(default_lookup,
true);
need_clone = true;
strlcpy(lookup->textname, rv[0],
sizeof(lookup->textname));
lookup->trace_root = (lookup->trace ||
lookup->ns_search_only);
lookup->new_search = true;
if (firstarg) {
printgreeting(argc, argv, lookup);
firstarg = false;
}
ISC_LIST_APPEND(lookup_list, lookup, link);
debug("looking up %s", lookup->textname);
}
/* XXX Error message */
}
}
/*
* If we have a batchfile, seed the lookup list with the
* first entry, then trust the callback in dighost_shutdown
* to get the rest
*/
if ((batchname != NULL) && !(is_batchfile)) {
if (strcmp(batchname, "-") == 0)
batchfp = stdin;
else
batchfp = fopen(batchname, "r");
if (batchfp == NULL) {
perror(batchname);
if (exitcode < 8)
exitcode = 8;
fatal("couldn't open specified batch file");
}
/* XXX Remove code dup from shutdown code */
next_line:
if (fgets(batchline, sizeof(batchline), batchfp) != 0) {
debug("batch line %s", batchline);
if (batchline[0] == '\r' || batchline[0] == '\n' ||
batchline[0] == '#' || batchline[0] == ';')
goto next_line;
bargc = split_batchline(batchline, bargv, 14,
"batch argv");
bargv[0] = argv[0];
argv0 = argv[0];
parse_args(true, false, bargc, (char **)bargv);
return;
}
return;
}
/*
* If no lookup specified, search for root
*/
if ((lookup_list.head == NULL) && !config_only) {
if (need_clone)
lookup = clone_lookup(default_lookup, true);
need_clone = true;
lookup->trace_root = (lookup->trace ||
lookup->ns_search_only);
lookup->new_search = true;
strlcpy(lookup->textname, ".", sizeof(lookup->textname));
lookup->rdtype = dns_rdatatype_ns;
lookup->rdtypeset = true;
if (firstarg) {
printgreeting(argc, argv, lookup);
firstarg = false;
}
ISC_LIST_APPEND(lookup_list, lookup, link);
}
if (!need_clone)
destroy_lookup(lookup);
}
/*
* Callback from dighost.c to allow program-specific shutdown code.
* Here, we're possibly reading from a batch file, then shutting down
* for real if there's nothing in the batch file to read.
*/
static void
query_finished(void) {
char batchline[MXNAME];
int bargc;
char *bargv[16];
if (batchname == NULL) {
isc_app_shutdown();
return;
}
fflush(stdout);
if (feof(batchfp)) {
batchname = NULL;
isc_app_shutdown();
if (batchfp != stdin)
fclose(batchfp);
return;
}
if (fgets(batchline, sizeof(batchline), batchfp) != 0) {
debug("batch line %s", batchline);
bargc = split_batchline(batchline, bargv, 14, "batch argv");
bargv[0] = argv0;
parse_args(true, false, bargc, (char **)bargv);
start_lookup();
} else {
batchname = NULL;
if (batchfp != stdin)
fclose(batchfp);
isc_app_shutdown();
return;
}
}
void dig_setup(int argc, char **argv)
{
isc_result_t result;
ISC_LIST_INIT(lookup_list);
ISC_LIST_INIT(server_list);
ISC_LIST_INIT(search_list);
debug("dig_setup()");
/* setup dighost callbacks */
dighost_printmessage = printmessage;
dighost_received = received;
dighost_trying = trying;
dighost_shutdown = query_finished;
progname = argv[0];
preparse_args(argc, argv);
result = isc_app_start();
check_result(result, "isc_app_start");
setup_libs();
setup_system(ipv4only, ipv6only);
}
void dig_query_setup(bool is_batchfile, bool config_only,
int argc, char **argv)
{
debug("dig_query_setup");
parse_args(is_batchfile, config_only, argc, argv);
if (keyfile[0] != 0)
setup_file_key();
else if (keysecret[0] != 0)
setup_text_key();
if (domainopt[0] != '\0') {
set_search_domain(domainopt);
usesearch = true;
}
}
void dig_startup() {
isc_result_t result;
debug("dig_startup()");
result = isc_app_onrun(mctx, global_task, onrun_callback, NULL);
check_result(result, "isc_app_onrun");
isc_app_run();
}
void dig_query_start()
{
start_lookup();
}
void
dig_shutdown() {
destroy_lookup(default_lookup);
if (batchname != NULL) {
if (batchfp != stdin)
fclose(batchfp);
batchname = NULL;
}
cancel_all();
destroy_libs();
isc_app_finish();
}
/*% Main processing routine for dig */
int
main(int argc, char **argv) {
dig_setup(argc, argv);
dig_query_setup(false, false, argc, argv);
dig_startup();
dig_shutdown();
return (exitcode);
}
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