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Import the resolver part of BIND 9.4.3.

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This commit is contained in:
Hajimu UMEMOTO 2008-12-14 16:47:21 +00:00
parent 4117715965
commit 9aeb4147cc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor/resolver/dist/; revision=186083
svn path=/vendor/resolver/9.4.3/; revision=186084; tag=vendor/resolver/9.4.3
9 changed files with 155 additions and 33 deletions
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5
include/arpa/nameser.h
View File

@ -49,7 +49,7 @@
*/
/*
* $Id: nameser.h,v 1.7.18.1 2005/04/27 05:00:50 sra Exp $
* $Id: nameser.h,v 1.7.18.2 2008/04/03 23:15:15 marka Exp $
*/
#ifndef _ARPA_NAMESER_H_
@ -427,9 +427,10 @@ typedef enum __ns_cert_types {
#define NS_NXT_MAX 127
/*%
* EDNS0 extended flags, host order.
* EDNS0 extended flags and option codes, host order.
*/
#define NS_OPT_DNSSEC_OK 0x8000U
#define NS_OPT_NSID 3
/*%
* Inline versions of get/put short/long. Pointer is advanced.

6
include/resolv.h
View File

@ -50,7 +50,7 @@
/*%
* @(#)resolv.h 8.1 (Berkeley) 6/2/93
* $Id: resolv.h,v 1.19.18.3 2005/08/25 04:43:51 marka Exp $
* $Id: resolv.h,v 1.19.18.4 2008/04/03 23:15:15 marka Exp $
*/
#ifndef _RESOLV_H_
@ -250,6 +250,7 @@ union res_sockaddr_union {
#define RES_NOCHECKNAME 0x00008000 /*%< do not check names for sanity. */
#define RES_KEEPTSIG 0x00010000 /*%< do not strip TSIG records */
#define RES_BLAST 0x00020000 /*%< blast all recursive servers */
#define RES_NSID 0x00040000 /*%< request name server ID */
#define RES_NOTLDQUERY 0x00100000 /*%< don't unqualified name as a tld */
#define RES_USE_DNSSEC 0x00200000 /*%< use DNSSEC using OK bit in OPT */
/* #define RES_DEBUG2 0x00400000 */ /* nslookup internal */
@ -396,6 +397,7 @@ extern const struct res_sym __p_rcode_syms[];
#define sym_ntos __sym_ntos
#define sym_ston __sym_ston
#define res_nopt __res_nopt
#define res_nopt_rdata __res_nopt_rdata
#define res_ndestroy __res_ndestroy
#define res_nametoclass __res_nametoclass
#define res_nametotype __res_nametotype
@ -482,6 +484,8 @@ int res_findzonecut2 __P((res_state, const char *, ns_class, int,
union res_sockaddr_union *, int));
void res_nclose __P((res_state));
int res_nopt __P((res_state, int, u_char *, int, int));
int res_nopt_rdata __P((res_state, int, u_char *, int, u_char *,
u_short, u_short, u_char *));
void res_send_setqhook __P((res_send_qhook));
void res_send_setrhook __P((res_send_rhook));
int __res_vinit __P((res_state, int));

4
lib/libc/include/isc/eventlib.h
View File

@ -18,7 +18,7 @@
/* eventlib.h - exported interfaces for eventlib
* vix 09sep95 [initial]
*
* $Id: eventlib.h,v 1.3.18.2 2005/07/28 07:38:07 marka Exp $
* $Id: eventlib.h,v 1.3.18.3 2008/01/23 02:12:01 marka Exp $
*/
#ifndef _EVENTLIB_H
@ -29,6 +29,8 @@
#include <sys/time.h>
#include <stdio.h>
#include <isc/platform.h>
#ifndef __P
# define __EVENTLIB_P_DEFINED
# ifdef __STDC__

6
lib/libc/inet/inet_net_pton.c
View File

@ -16,7 +16,7 @@
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: inet_net_pton.c,v 1.7.18.1 2005/04/27 05:00:53 sra Exp $";
static const char rcsid[] = "$Id: inet_net_pton.c,v 1.7.18.2 2008/08/26 04:42:43 marka Exp $";
#endif
#include "port_before.h"
@ -133,11 +133,11 @@ inet_net_pton_ipv4(const char *src, u_char *dst, size_t size) {
INSIST(n >= 0 && n <= 9);
bits *= 10;
bits += n;
if (bits > 32)
goto enoent;
} while ((ch = *src++) != '\0' && isascii(ch) && isdigit(ch));
if (ch != '\0')
goto enoent;
if (bits > 32)
goto emsgsize;
}
/* Firey death and destruction unless we prefetched EOS. */

4
lib/libc/inet/inet_network.c
View File

@ -84,9 +84,9 @@ inet_network(cp)
}
if (!digit)
return (INADDR_NONE);
if (pp >= parts + 4 || val > 0xffU)
return (INADDR_NONE);
if (*cp == '.') {
if (pp >= parts + 4 || val > 0xffU)
return (INADDR_NONE);
*pp++ = val, cp++;
goto again;
}

55
lib/libc/resolv/res_debug.c
View File

@ -95,7 +95,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_debug.c,v 1.10.18.5 2005/07/28 07:38:11 marka Exp $";
static const char rcsid[] = "$Id: res_debug.c,v 1.10.18.6 2008/04/03 23:15:15 marka Exp $";
#endif /* LIBC_SCCS and not lint */
#include "port_before.h"
@ -189,10 +189,56 @@ do_section(const res_state statp,
p_type(ns_rr_type(rr)),
p_class(ns_rr_class(rr)));
else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr);
u_int32_t ttl = ns_rr_ttl(rr);
fprintf(file,
"; EDNS: version: %u, udp=%u, flags=%04x\n",
(ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
while (rdatalen >= 4) {
const u_char *cp = ns_rr_rdata(rr);
int i;
GETSHORT(optcode, cp);
GETSHORT(optlen, cp);
if (optcode == NS_OPT_NSID) {
fputs("; NSID: ", file);
if (optlen == 0) {
fputs("; NSID\n", file);
} else {
fputs("; NSID: ", file);
for (i = 0; i < optlen; i++)
fprintf(file, "%02x ",
cp[i]);
fputs(" (",file);
for (i = 0; i < optlen; i++)
fprintf(file, "%c",
isprint(cp[i])?
cp[i] : '.');
fputs(")\n", file);
}
} else {
if (optlen == 0) {
fprintf(file, "; OPT=%u\n",
optcode);
} else {
fprintf(file, "; OPT=%u: ",
optcode);
for (i = 0; i < optlen; i++)
fprintf(file, "%02x ",
cp[i]);
fputs(" (",file);
for (i = 0; i < optlen; i++)
fprintf(file, "%c",
isprint(cp[i]) ?
cp[i] : '.');
fputs(")\n", file);
}
}
rdatalen -= 4 + optlen;
}
} else {
n = ns_sprintrr(handle, &rr, NULL, NULL,
buf, buflen);
@ -204,7 +250,7 @@ do_section(const res_state statp,
buf = malloc(buflen += 1024);
if (buf == NULL) {
fprintf(file,
";; memory allocation failure\n");
";; memory allocation failure\n");
return;
}
continue;
@ -381,7 +427,7 @@ const struct res_sym __p_default_section_syms[] = {
{ns_s_an, "ANSWER", (char *)0},
{ns_s_ns, "AUTHORITY", (char *)0},
{ns_s_ar, "ADDITIONAL", (char *)0},
{0, (char *)0, (char *)0}
{0, (char *)0, (char *)0}
};
const struct res_sym __p_update_section_syms[] = {
@ -389,7 +435,7 @@ const struct res_sym __p_update_section_syms[] = {
{S_PREREQ, "PREREQUISITE", (char *)0},
{S_UPDATE, "UPDATE", (char *)0},
{S_ADDT, "ADDITIONAL", (char *)0},
{0, (char *)0, (char *)0}
{0, (char *)0, (char *)0}
};
const struct res_sym __p_key_syms[] = {
@ -617,6 +663,7 @@ p_option(u_long option) {
case RES_USE_INET6: return "inet6";
#ifdef RES_USE_EDNS0 /*%< KAME extension */
case RES_USE_EDNS0: return "edns0";
case RES_NSID: return "nsid";
#endif
#ifdef RES_USE_DNAME
case RES_USE_DNAME: return "dname";

66
lib/libc/resolv/res_mkquery.c
View File

@ -70,7 +70,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_mkquery.c,v 1.5.18.1 2005/04/27 05:01:11 sra Exp $";
static const char rcsid[] = "$Id: res_mkquery.c,v 1.5.18.2 2008/04/03 23:15:15 marka Exp $";
#endif /* LIBC_SCCS and not lint */
#include "port_before.h"
@ -203,9 +203,6 @@ res_nmkquery(res_state statp,
#ifdef RES_USE_EDNS0
/* attach OPT pseudo-RR, as documented in RFC2671 (EDNS0). */
#ifndef T_OPT
#define T_OPT 41
#endif
int
res_nopt(res_state statp,
@ -230,13 +227,14 @@ res_nopt(res_state statp,
if ((ep - cp) < 1 + RRFIXEDSZ)
return (-1);
*cp++ = 0; /*%< "." */
ns_put16(T_OPT, cp); /*%< TYPE */
*cp++ = 0; /*%< "." */
ns_put16(ns_t_opt, cp); /*%< TYPE */
cp += INT16SZ;
ns_put16(anslen & 0xffff, cp); /*%< CLASS = UDP payload size */
ns_put16(anslen & 0xffff, cp); /*%< CLASS = UDP payload size */
cp += INT16SZ;
*cp++ = NOERROR; /*%< extended RCODE */
*cp++ = 0; /*%< EDNS version */
*cp++ = NOERROR; /*%< extended RCODE */
*cp++ = 0; /*%< EDNS version */
if (statp->options & RES_USE_DNSSEC) {
#ifdef DEBUG
if (statp->options & RES_DEBUG)
@ -246,12 +244,60 @@ res_nopt(res_state statp,
}
ns_put16(flags, cp);
cp += INT16SZ;
ns_put16(0, cp); /*%< RDLEN */
ns_put16(0U, cp); /*%< RDLEN */
cp += INT16SZ;
hp->arcount = htons(ntohs(hp->arcount) + 1);
return (cp - buf);
}
/*
* Construct variable data (RDATA) block for OPT psuedo-RR, append it
* to the buffer, then update the RDLEN field (previously set to zero by
* res_nopt()) with the new RDATA length.
*/
int
res_nopt_rdata(res_state statp,
int n0, /*%< current offset in buffer */
u_char *buf, /*%< buffer to put query */
int buflen, /*%< size of buffer */
u_char *rdata, /*%< ptr to start of opt rdata */
u_short code, /*%< OPTION-CODE */
u_short len, /*%< OPTION-LENGTH */
u_char *data) /*%< OPTION_DATA */
{
register u_char *cp, *ep;
#ifdef DEBUG
if ((statp->options & RES_DEBUG) != 0U)
printf(";; res_nopt_rdata()\n");
#endif
cp = buf + n0;
ep = buf + buflen;
if ((ep - cp) < (4 + len))
return (-1);
if (rdata < (buf + 2) || rdata >= ep)
return (-1);
ns_put16(code, cp);
cp += INT16SZ;
ns_put16(len, cp);
cp += INT16SZ;
memcpy(cp, data, len);
cp += len;
len = cp - rdata;
ns_put16(len, rdata - 2); /* Update RDLEN field */
return (cp - buf);
}
#endif
/*! \file */

14
lib/libc/resolv/res_query.c
View File

@ -70,7 +70,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_query.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_query.c,v 1.7.18.1 2005/04/27 05:01:11 sra Exp $";
static const char rcsid[] = "$Id: res_query.c,v 1.7.18.2 2008/04/03 23:15:15 marka Exp $";
#endif /* LIBC_SCCS and not lint */
#include "port_before.h"
@ -116,8 +116,9 @@ res_nquery(res_state statp,
{
u_char buf[MAXPACKET];
HEADER *hp = (HEADER *) answer;
int n;
u_int oflags;
u_char *rdata;
int n;
oflags = statp->_flags;
@ -132,8 +133,14 @@ res_nquery(res_state statp,
buf, sizeof(buf));
#ifdef RES_USE_EDNS0
if (n > 0 && (statp->_flags & RES_F_EDNS0ERR) == 0 &&
(statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC)) != 0U)
(statp->options & (RES_USE_EDNS0|RES_USE_DNSSEC|RES_NSID))) {
n = res_nopt(statp, n, buf, sizeof(buf), anslen);
rdata = &buf[n];
if (n > 0 && (statp->options & RES_NSID) != 0U) {
n = res_nopt_rdata(statp, n, buf, sizeof(buf), rdata,
NS_OPT_NSID, 0, NULL);
}
}
#endif
if (n <= 0) {
#ifdef DEBUG
@ -143,6 +150,7 @@ res_nquery(res_state statp,
RES_SET_H_ERRNO(statp, NO_RECOVERY);
return (n);
}
n = res_nsend(statp, buf, n, answer, anslen);
if (n < 0) {
#ifdef RES_USE_EDNS0

28
lib/libc/resolv/res_send.c
View File

@ -70,7 +70,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static const char sccsid[] = "@(#)res_send.c 8.1 (Berkeley) 6/4/93";
static const char rcsid[] = "$Id: res_send.c,v 1.9.18.8 2006/10/16 23:00:58 marka Exp $";
static const char rcsid[] = "$Id: res_send.c,v 1.9.18.10 2008/01/27 02:06:26 marka Exp $";
#endif /* LIBC_SCCS and not lint */
/*! \file
@ -293,7 +293,7 @@ int
res_nsend(res_state statp,
const u_char *buf, int buflen, u_char *ans, int anssiz)
{
int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
int gotsomewhere, terrno, tries, v_circuit, resplen, ns, n;
char abuf[NI_MAXHOST];
#ifdef USE_POLL
@ -405,7 +405,7 @@ res_nsend(res_state statp,
/*
* Send request, RETRY times, or until successful.
*/
for (try = 0; try < statp->retry; try++) {
for (tries = 0; tries < statp->retry; tries++) {
for (ns = 0; ns < statp->nscount; ns++) {
struct sockaddr *nsap;
int nsaplen;
@ -453,7 +453,7 @@ res_nsend(res_state statp,
if (v_circuit) {
/* Use VC; at most one attempt per server. */
try = statp->retry;
tries = statp->retry;
n = send_vc(statp, buf, buflen, ans, anssiz, &terrno,
ns);
if (n < 0)
@ -464,7 +464,7 @@ res_nsend(res_state statp,
} else {
/* Use datagrams. */
n = send_dg(statp, buf, buflen, ans, anssiz, &terrno,
ns, try, &v_circuit, &gotsomewhere);
ns, tries, &v_circuit, &gotsomewhere);
if (n < 0)
goto fail;
if (n == 0)
@ -601,6 +601,9 @@ send_vc(res_state statp,
u_short len;
u_char *cp;
void *tmp;
#ifdef SO_NOSIGPIPE
int on = 1;
#endif
nsap = get_nsaddr(statp, ns);
nsaplen = get_salen(nsap);
@ -646,6 +649,17 @@ send_vc(res_state statp,
return (-1);
}
}
#ifdef SO_NOSIGPIPE
/*
* Disable generation of SIGPIPE when writing to a closed
* socket. Write should return -1 and set errno to EPIPE
* instead.
*
* Push on even if setsockopt(SO_NOSIGPIPE) fails.
*/
(void)setsockopt(statp->_vcsock, SOL_SOCKET, SO_NOSIGPIPE, &on,
sizeof(on));
#endif
errno = 0;
if (connect(statp->_vcsock, nsap, nsaplen) < 0) {
*terrno = errno;
@ -773,7 +787,7 @@ send_vc(res_state statp,
static int
send_dg(res_state statp, const u_char *buf, int buflen, u_char *ans,
int anssiz, int *terrno, int ns, int try, int *v_circuit,
int anssiz, int *terrno, int ns, int tries, int *v_circuit,
int *gotsomewhere)
{
const HEADER *hp = (const HEADER *) buf;
@ -855,7 +869,7 @@ send_dg(res_state statp, const u_char *buf, int buflen, u_char *ans,
/*
* Wait for reply.
*/
seconds = (statp->retrans << try);
seconds = (statp->retrans << tries);
if (ns > 0)
seconds /= statp->nscount;
if (seconds <= 0)