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get* rework and new bind code

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This commit is contained in:
Paul Traina 1994-09-25 02:12:49 +00:00
parent 08a0aca6e2
commit 1363f04ce1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=3070
17 changed files with 3030 additions and 1287 deletions
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284
include/arpa/nameser.h
View File

@ -30,7 +30,6 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)nameser.h 8.2 (Berkeley) 2/16/94
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
@ -51,142 +50,134 @@
* SOFTWARE.
* -
* --Copyright--
*
* @(#)nameser.h 8.2 (Berkeley) 2/16/94
* From Id: nameser.h,v 4.9.1.15 1994/07/19 22:51:24 vixie Exp
*/
#ifndef _ARPA_NAMESER_H_
#define _ARPA_NAMESER_H_
#ifndef _NAMESER_H_
#define _NAMESER_H_
#include <sys/param.h>
#include <sys/types.h>
#include <sys/cdefs.h>
#include <machine/endian.h>
/*
* revision information. this is the release date in YYYYMMDD format.
* it can change every day so the right thing to do with it is use it
* in preprocessor commands such as "#if (__BIND > 19931104)". do not
* compare for equality; rather, use it to determine whether your resolver
* is new enough to contain a certain feature.
*/
#define __BIND 19940417 /* interface version stamp */
/*
* Define constants based on rfc883
*/
#define PACKETSZ 512 /* maximum packet size */
#define MAXDNAME 256 /* maximum domain name */
#define MAXCDNAME 255 /* maximum compressed domain name */
#define MAXLABEL 63 /* maximum length of domain label */
/* Number of bytes of fixed size data in query structure */
#define QFIXEDSZ 4
/* number of bytes of fixed size data in resource record */
#define RRFIXEDSZ 10
#define PACKETSZ 512 /* maximum packet size */
#define MAXDNAME 256 /* maximum domain name */
#define MAXCDNAME 255 /* maximum compressed domain name */
#define MAXLABEL 63 /* maximum length of domain label */
#define HFIXEDSZ 12 /* #/bytes of fixed data in header */
#define QFIXEDSZ 4 /* #/bytes of fixed data in query */
#define RRFIXEDSZ 10 /* #/bytes of fixed data in r record */
#define INT32SZ 4 /* for systems without 32-bit ints */
#define INT16SZ 2 /* for systems without 16-bit ints */
#define INADDRSZ 4 /* for sizeof(struct inaddr) != 4 */
/*
* Internet nameserver port number
*/
#define NAMESERVER_PORT 53
#define NAMESERVER_PORT 53
/*
* Currently defined opcodes
* Currently define d opcodes
*/
#define QUERY 0x0 /* standard query */
#define IQUERY 0x1 /* inverse query */
#define STATUS 0x2 /* nameserver status query */
/*#define xxx 0x3 /* 0x3 reserved */
#define QUERY 0x0 /* standard query */
#define IQUERY 0x1 /* inverse query */
#define STATUS 0x2 /* nameserver status query */
/* 0x3 reserved */
/* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */
#define UPDATEA 0x9 /* add resource record */
#define UPDATED 0xa /* delete a specific resource record */
#define UPDATEDA 0xb /* delete all named resource record */
#define UPDATEM 0xc /* modify a specific resource record */
#define UPDATEMA 0xd /* modify all named resource record */
#define UPDATEA 0x9 /* add resource record */
#define UPDATED 0xa /* delete a specific resource record */
#define UPDATEDA 0xb /* delete all named resource record */
#define UPDATEM 0xc /* modify a specific resource record */
#define UPDATEMA 0xd /* modify all named resource record */
#define ZONEINIT 0xe /* initial zone transfer */
#define ZONEREF 0xf /* incremental zone referesh */
#define ZONEINIT 0xe /* initial zone transfer */
#define ZONEREF 0xf /* incremental zone referesh */
/*
* Currently defined response codes
* Currently define d response codes
*/
#define NOERROR 0 /* no error */
#define FORMERR 1 /* format error */
#define SERVFAIL 2 /* server failure */
#define NXDOMAIN 3 /* non existent domain */
#define NOTIMP 4 /* not implemented */
#define REFUSED 5 /* query refused */
#define NOERROR 0 /* no error */
#define FORMERR 1 /* format error */
#define SERVFAIL 2 /* server failure */
#define NXDOMAIN 3 /* non existent domain */
#define NOTIMP 4 /* not implemented */
#define REFUSED 5 /* query refused */
/* non standard */
#define NOCHANGE 0xf /* update failed to change db */
#define NOCHANGE 0xf /* update failed to change db */
/*
* Type values for resources and queries
*/
#define T_A 1 /* host address */
#define T_NS 2 /* authoritative server */
#define T_MD 3 /* mail destination */
#define T_MF 4 /* mail forwarder */
#define T_CNAME 5 /* connonical name */
#define T_SOA 6 /* start of authority zone */
#define T_MB 7 /* mailbox domain name */
#define T_MG 8 /* mail group member */
#define T_MR 9 /* mail rename name */
#define T_NULL 10 /* null resource record */
#define T_WKS 11 /* well known service */
#define T_PTR 12 /* domain name pointer */
#define T_HINFO 13 /* host information */
#define T_MINFO 14 /* mailbox information */
#define T_MX 15 /* mail routing information */
#define T_TXT 16 /* text strings */
#define T_A 1 /* host address */
#define T_NS 2 /* authoritative server */
#define T_MD 3 /* mail destination */
#define T_MF 4 /* mail forwarder */
#define T_CNAME 5 /* connonical name */
#define T_SOA 6 /* start of authority zone */
#define T_MB 7 /* mailbox domain name */
#define T_MG 8 /* mail group member */
#define T_MR 9 /* mail rename name */
#define T_NULL 10 /* null resource record */
#define T_WKS 11 /* well known service */
#define T_PTR 12 /* domain name pointer */
#define T_HINFO 13 /* host information */
#define T_MINFO 14 /* mailbox information */
#define T_MX 15 /* mail routing information */
#define T_TXT 16 /* text strings */
#define T_RP 17 /* responsible person */
#define T_AFSDB 18 /* AFS cell database */
#define T_X25 19 /* X_25 calling address */
#define T_ISDN 20 /* ISDN calling address */
#define T_RT 21 /* router */
#define T_NSAP 22 /* NSAP address */
#define T_NSAP_PTR 23 /* reverse lookup for NSAP */
#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */
/* non standard */
#define T_UINFO 100 /* user (finger) information */
#define T_UID 101 /* user ID */
#define T_GID 102 /* group ID */
#define T_UNSPEC 103 /* Unspecified format (binary data) */
#define T_UINFO 100 /* user (finger) information */
#define T_UID 101 /* user ID */
#define T_GID 102 /* group ID */
#define T_UNSPEC 103 /* Unspecified format (binary data) */
#define T_SA 200 /* shuffle address */
/* Query type values which do not appear in resource records */
#define T_AXFR 252 /* transfer zone of authority */
#define T_MAILB 253 /* transfer mailbox records */
#define T_MAILA 254 /* transfer mail agent records */
#define T_ANY 255 /* wildcard match */
#define T_AXFR 252 /* transfer zone of authority */
#define T_MAILB 253 /* transfer mailbox records */
#define T_MAILA 254 /* transfer mail agent records */
#define T_ANY 255 /* wildcard match */
/*
* Values for class field
*/
#define C_IN 1 /* the arpa internet */
#define C_CHAOS 3 /* for chaos net (MIT) */
#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */
#define C_IN 1 /* the arpa internet */
#define C_CHAOS 3 /* for chaos net (MIT) */
#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */
/* Query class values which do not appear in resource records */
#define C_ANY 255 /* wildcard match */
#define C_ANY 255 /* wildcard match */
/*
* Status return codes for T_UNSPEC conversion routines
*/
#define CONV_SUCCESS 0
#define CONV_OVERFLOW -1
#define CONV_BADFMT -2
#define CONV_BADCKSUM -3
#define CONV_BADBUFLEN -4
#ifndef BYTE_ORDER
#define LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */
#define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp)*/
#if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) || \
defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) || \
defined(__alpha__) || defined(__alpha)
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) || \
defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) || \
defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) || \
defined(apollo) || defined(hp9000) || defined(hp9000s300) || \
defined (BIT_ZERO_ON_LEFT)
#define BYTE_ORDER BIG_ENDIAN
#endif
#endif /* BYTE_ORDER */
#if !defined(BYTE_ORDER) || \
(BYTE_ORDER != BIG_ENDIAN && BYTE_ORDER != LITTLE_ENDIAN && \
BYTE_ORDER != PDP_ENDIAN)
/* you must determine what the correct bit order is for
* your compiler - the next line is an intentional error
* which will force your compiles to bomb until you fix
* the above macros.
*/
#error "Undefined or invalid BYTE_ORDER";
#endif
#define CONV_SUCCESS 0
#define CONV_OVERFLOW (-1)
#define CONV_BADFMT (-2)
#define CONV_BADCKSUM (-3)
#define CONV_BADBUFLEN (-4)
/*
* Structure for query header. The order of the fields is machine- and
@ -196,103 +187,100 @@
*/
typedef struct {
u_int16_t id; /* query identification number */
unsigned id :16; /* query identification number */
#if BYTE_ORDER == BIG_ENDIAN
/* fields in third byte */
u_int qr:1; /* response flag */
u_int opcode:4; /* purpose of message */
u_int aa:1; /* authoritive answer */
u_int tc:1; /* truncated message */
u_int rd:1; /* recursion desired */
unsigned qr: 1; /* response flag */
unsigned opcode: 4; /* purpose of message */
unsigned aa: 1; /* authoritive answer */
unsigned tc: 1; /* truncated message */
unsigned rd: 1; /* recursion desired */
/* fields in fourth byte */
u_int ra:1; /* recursion available */
u_int pr:1; /* primary server required (non standard) */
u_int unused:2; /* unused bits */
u_int rcode:4; /* response code */
unsigned ra: 1; /* recursion available */
unsigned pr: 1; /* primary server req'd (!standard) */
unsigned unused :2; /* unused bits (MBZ as of 4.9.3a3) */
unsigned rcode :4; /* response code */
#endif
#if BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN
/* fields in third byte */
u_int rd:1; /* recursion desired */
u_int tc:1; /* truncated message */
u_int aa:1; /* authoritive answer */
u_int opcode:4; /* purpose of message */
u_int qr:1; /* response flag */
unsigned rd :1; /* recursion desired */
unsigned tc :1; /* truncated message */
unsigned aa :1; /* authoritive answer */
unsigned opcode :4; /* purpose of message */
unsigned qr :1; /* response flag */
/* fields in fourth byte */
u_int rcode:4; /* response code */
u_int unused:2; /* unused bits */
u_int pr:1; /* primary server required (non standard) */
u_int ra:1; /* recursion available */
unsigned rcode :4; /* response code */
unsigned unused :2; /* unused bits (MBZ as of 4.9.3a3) */
unsigned pr :1; /* primary server req'd (!standard) */
unsigned ra :1; /* recursion available */
#endif
/* remaining bytes */
u_int16_t qdcount; /* number of question entries */
u_int16_t ancount; /* number of answer entries */
u_int16_t nscount; /* number of authority entries */
u_int16_t arcount; /* number of resource entries */
unsigned qdcount :16; /* number of question entries */
unsigned ancount :16; /* number of answer entries */
unsigned nscount :16; /* number of authority entries */
unsigned arcount :16; /* number of resource entries */
} HEADER;
/*
* Defines for handling compressed domain names
*/
#define INDIR_MASK 0xc0
#define INDIR_MASK 0xc0
/*
* Structure for passing resource records around.
*/
struct rrec {
int16_t r_zone; /* zone number */
int16_t r_class; /* class number */
int16_t r_type; /* type number */
int16_t r_zone; /* zone number */
int16_t r_class; /* class number */
int16_t r_type; /* type number */
u_int32_t r_ttl; /* time to live */
int r_size; /* size of data area */
char *r_data; /* pointer to data */
int r_size; /* size of data area */
char *r_data; /* pointer to data */
};
extern u_int16_t _getshort();
extern u_int32_t _getlong();
extern u_int16_t _getshort __P((const u_char *));
extern u_int32_t _getlong __P((const u_char *));
/*
* Inline versions of get/put short/long. Pointer is advanced.
* We also assume that a "u_int16_t" holds 2 "chars"
* and that a "u_int32_t" holds 4 "chars".
*
* These macros demonstrate the property of C whereby it can be
* portable or it can be elegant but never both.
* portable or it can be elegant but rarely both.
*/
#define GETSHORT(s, cp) { \
#define GETSHORT(s, cp) { \
register u_char *t_cp = (u_char *)(cp); \
(s) = ((u_int16_t)t_cp[0] << 8) | (u_int16_t)t_cp[1]; \
(cp) += 2; \
(s) = ((u_int16_t)t_cp[0] << 8) \
| ((u_int16_t)t_cp[1]) \
; \
(cp) += INT16SZ; \
}
#define GETLONG(l, cp) { \
#define GETLONG(l, cp) { \
register u_char *t_cp = (u_char *)(cp); \
(l) = (((u_int32_t)t_cp[0]) << 24) \
| (((u_int32_t)t_cp[1]) << 16) \
| (((u_int32_t)t_cp[2]) << 8) \
| (((u_int32_t)t_cp[3])); \
(cp) += 4; \
(l) = ((u_int32_t)t_cp[0] << 24) \
| ((u_int32_t)t_cp[1] << 16) \
| ((u_int32_t)t_cp[2] << 8) \
| ((u_int32_t)t_cp[3]) \
; \
(cp) += INT32SZ; \
}
#define PUTSHORT(s, cp) { \
#define PUTSHORT(s, cp) { \
register u_int16_t t_s = (u_int16_t)(s); \
register u_char *t_cp = (u_char *)(cp); \
*t_cp++ = t_s >> 8; \
*t_cp = t_s; \
(cp) += 2; \
(cp) += INT16SZ; \
}
/*
* Warning: PUTLONG --no-longer-- destroys its first argument. if you
* were depending on this "feature", you will lose.
*/
#define PUTLONG(l, cp) { \
#define PUTLONG(l, cp) { \
register u_int32_t t_l = (u_int32_t)(l); \
register u_char *t_cp = (u_char *)(cp); \
*t_cp++ = t_l >> 24; \
*t_cp++ = t_l >> 16; \
*t_cp++ = t_l >> 8; \
*t_cp = t_l; \
(cp) += 4; \
(cp) += INT32SZ; \
}
#endif /* !_NAMESER_H_ */

156
include/resolv.h
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@ -30,8 +30,6 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)resolv.h 8.1 (Berkeley) 6/2/93
* $Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp $
* -
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
@ -52,12 +50,30 @@
* SOFTWARE.
* -
* --Copyright--
*
* @(#)resolv.h 8.1 (Berkeley) 6/2/93
* From Id: resolv.h,v 4.9.1.2 1993/05/17 09:59:01 vixie Exp
* $Id$
*/
#ifndef _RESOLV_H_
#define _RESOLV_H_
#include <sys/param.h>
#include <sys/types.h>
#include <sys/cdefs.h>
#include <stdio.h>
/*
* revision information. this is the release date in YYYYMMDD format.
* it can change every day so the right thing to do with it is use it
* in preprocessor commands such as "#if (__RES > 19931104)". do not
* compare for equality; rather, use it to determine whether your resolver
* is new enough to contain a certain feature.
*/
#define __RES 19940415
/*
* Resolver configuration file.
* Normally not present, but may contain the address of the
@ -65,7 +81,7 @@
*/
#ifndef _PATH_RESCONF
#define _PATH_RESCONF "/etc/resolv.conf"
#define _PATH_RESCONF "/etc/resolv.conf"
#endif
/*
@ -77,88 +93,132 @@
#define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */
#define RES_TIMEOUT 5 /* min. seconds between retries */
#define MAXRESOLVSORT 10 /* number of net to sort on */
#define RES_MAXNDOTS 15 /* should reflect bit field size */
struct __res_state {
int retrans; /* retransmition time interval */
int retry; /* number of times to retransmit */
long options; /* option flags - see below. */
u_long options; /* option flags - see below. */
int nscount; /* number of name servers */
struct sockaddr_in nsaddr_list[MAXNS]; /* address of name server */
struct sockaddr_in
nsaddr_list[MAXNS]; /* address of name server */
#define nsaddr nsaddr_list[0] /* for backward compatibility */
u_short id; /* current packet id */
char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */
char defdname[MAXDNAME]; /* default domain */
long pfcode; /* RES_PRF_ flags - see below. */
u_long pfcode; /* RES_PRF_ flags - see below. */
unsigned ndots:4; /* threshold for initial abs. query */
unsigned nsort:4; /* number of elements in sort_list[] */
char unused[3];
struct {
struct in_addr addr;
u_int32_t mask;
} sort_list[MAXRESOLVSORT];
};
/*
* Resolver options (keep these in synch with res_debug.c, please)
*/
#define RES_INIT 0x0001 /* address initialized */
#define RES_DEBUG 0x0002 /* print debug messages */
#define RES_AAONLY 0x0004 /* authoritative answers only */
#define RES_USEVC 0x0008 /* use virtual circuit */
#define RES_PRIMARY 0x0010 /* query primary server only */
#define RES_IGNTC 0x0020 /* ignore trucation errors */
#define RES_RECURSE 0x0040 /* recursion desired */
#define RES_DEFNAMES 0x0080 /* use default domain name */
#define RES_STAYOPEN 0x0100 /* Keep TCP socket open */
#define RES_DNSRCH 0x0200 /* search up local domain tree */
#define RES_INIT 0x00000001 /* address initialized */
#define RES_DEBUG 0x00000002 /* print debug messages */
#define RES_AAONLY 0x00000004 /* authoritative answers only */
#define RES_USEVC 0x00000008 /* use virtual circuit */
#define RES_PRIMARY 0x00000010 /* query primary server only */
#define RES_IGNTC 0x00000020 /* ignore trucation errors */
#define RES_RECURSE 0x00000040 /* recursion desired */
#define RES_DEFNAMES 0x00000080 /* use default domain name */
#define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */
#define RES_DNSRCH 0x00000200 /* search up local domain tree */
#define RES_INSECURE1 0x00000400 /* type 1 security disabled */
#define RES_INSECURE2 0x00000800 /* type 2 security disabled */
#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
#define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | RES_DNSRCH)
/*
* Resolver "pfcode" values. Used by dig.
*/
#define RES_PRF_STATS 0x0001
/* 0x0002 */
#define RES_PRF_CLASS 0x0004
#define RES_PRF_CMD 0x0008
#define RES_PRF_QUES 0x0010
#define RES_PRF_ANS 0x0020
#define RES_PRF_AUTH 0x0040
#define RES_PRF_ADD 0x0080
#define RES_PRF_HEAD1 0x0100
#define RES_PRF_HEAD2 0x0200
#define RES_PRF_TTLID 0x0400
#define RES_PRF_HEADX 0x0800
#define RES_PRF_QUERY 0x1000
#define RES_PRF_REPLY 0x2000
#define RES_PRF_INIT 0x4000
/* 0x8000 */
#define RES_PRF_STATS 0x00000001
/* 0x00000002 */
#define RES_PRF_CLASS 0x00000004
#define RES_PRF_CMD 0x00000008
#define RES_PRF_QUES 0x00000010
#define RES_PRF_ANS 0x00000020
#define RES_PRF_AUTH 0x00000040
#define RES_PRF_ADD 0x00000080
#define RES_PRF_HEAD1 0x00000100
#define RES_PRF_HEAD2 0x00000200
#define RES_PRF_TTLID 0x00000400
#define RES_PRF_HEADX 0x00000800
#define RES_PRF_QUERY 0x00001000
#define RES_PRF_REPLY 0x00002000
#define RES_PRF_INIT 0x00004000
/* 0x00008000 */
#include <sys/cdefs.h>
#include <stdio.h>
/* hooks are still experimental as of 4.9.2 */
typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error }
res_sendhookact;
typedef res_sendhookact (*res_send_qhook)__P((struct sockaddr_in * const *ns,
const u_char **query,
int *querylen,
u_char *ans,
int anssiz,
int *resplen));
typedef res_sendhookact (*res_send_rhook)__P((const struct sockaddr_in *ns,
const u_char *query,
int querylen,
u_char *ans,
int anssiz,
int *resplen));
extern struct __res_state _res;
/* Private routines shared between libc/net, named, nslookup and others. */
#define dn_skipname __dn_skipname
#define fp_query __fp_query
#define fp_nquery __fp_nquery
#define hostalias __hostalias
#define putlong __putlong
#define putshort __putshort
#define p_class __p_class
#define p_time __p_time
#define p_type __p_type
#define p_class __p_class
#define p_time __p_time
#define p_type __p_type
#define p_cdnname __p_cdnname
#define p_cdname __p_cdname
#define p_fqname __p_fqname
#define p_rr __p_rr
#define p_option __p_option
__BEGIN_DECLS
int __dn_skipname __P((const u_char *, const u_char *));
void __fp_resstat __P((struct __res_state *, FILE *));
void __fp_query __P((char *, FILE *));
void __fp_query __P((const u_char *, FILE *));
void __fp_nquery __P((const u_char *, int, FILE *));
char *__hostalias __P((const char *));
void __putlong __P((u_int32_t, u_char *));
void __putshort __P((u_short, u_char *));
char *__p_class __P((int));
void __putshort __P((u_int16_t, u_char *));
char *__p_time __P((u_int32_t));
char *__p_type __P((int));
int dn_comp __P((const u_char *, u_char *, int, u_char **, u_char **));
void __p_query __P((const u_char *));
const u_char *__p_cdnname __P((const u_char *, const u_char *, int, FILE *));
const u_char *__p_cdname __P((const u_char *, const u_char *, FILE *));
const u_char *__p_fqname __P((const u_char *, const u_char *, FILE *));
const u_char *__p_rr __P((const u_char *, const u_char *, FILE *));
const char *__p_type __P((int));
const char *__p_class __P((int));
const char *__p_option __P((u_long option));
int dn_comp __P((const char *, u_char *, int, u_char **, u_char **));
int dn_expand __P((const u_char *, const u_char *, const u_char *,
u_char *, int));
char *, int));
int res_init __P((void));
int res_mkquery __P((int, const char *, int, int, const char *, int,
const char *, char *, int));
int res_send __P((const char *, int, char *, int));
int res_query __P((const char *, int, int, u_char *, int));
int res_search __P((const char *, int, int, u_char *, int));
int res_querydomain __P((const char *, const char *, int, int,
u_char *, int));
int res_mkquery __P((int, const char *, int, int, const u_char *, int,
const u_char *, u_char *, int));
int res_send __P((const u_char *, int, u_char *, int));
__END_DECLS
#endif /* !_RESOLV_H_ */

9
lib/libc/net/Makefile.inc
View File

@ -3,13 +3,18 @@
# machine-independent net sources
.PATH: ${.CURDIR}/${MACHINE}/net ${.CURDIR}/net
SRCS+= gethostnamadr.c getnetbyaddr.c getnetbyname.c getnetent.c \
SRCS+= gethostbydns.c gethostbyht.c gethostbynis.c gethostnamadr.c \
getnetbydns.c getnetbyht.c getnetbynis.c getnetnamadr.c \
getproto.c getprotoent.c getprotoname.c getservbyname.c \
getservbyport.c getservent.c herror.c inet_addr.c inet_lnaof.c \
inet_makeaddr.c inet_netof.c inet_network.c inet_ntoa.c \
iso_addr.c linkaddr.c ns_addr.c ns_ntoa.c rcmd.c recv.c res_comp.c \
res_debug.c res_init.c res_mkquery.c res_query.c res_send.c \
send.c sethostent.c
send.c
# dig(1) requires the resolver to be compiled with debugging enabled
# if you don't care abut dig, you may comment this out
CFLAGS+=-DDEBUG
# machine-dependent net sources
.include "${.CURDIR}/${MACHINE}/net/Makefile.inc"

480
lib/libc/net/gethostbydns.c Normal file
View File

@ -0,0 +1,480 @@
/*-
* Copyright (c) 1985, 1988, 1993
* 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--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: gethnamaddr.c,v 4.9.1.19 1994/07/22 08:42:54 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#define BYADDR 0
#define BYNAME 1
#define MAXALIASES 35
#define MAXADDRS 35
#define MULTI_PTRS_ARE_ALIASES 1 /* XXX - experimental */
static const char AskedForGot[] =
"gethostby*.gethostanswer: asked for \"%s\", got \"%s\"";
static char *h_addr_ptrs[MAXADDRS + 1];
static struct hostent host;
static char *host_aliases[MAXALIASES];
static char hostbuf[8*1024];
static struct in_addr host_addr;
static FILE *hostf = NULL;
static char hostaddr[MAXADDRS];
static char *host_addrs[2];
static int stayopen = 0;
#if PACKETSZ > 1024
#define MAXPACKET PACKETSZ
#else
#define MAXPACKET 1024
#endif
typedef union {
HEADER hdr;
u_char buf[MAXPACKET];
} querybuf;
typedef union {
int32_t al;
char ac;
} align;
extern int h_errno;
#ifdef RESOLVSORT
static void
addrsort(ap, num)
char **ap;
int num;
{
int i, j;
char **p;
short aval[MAXADDRS];
int needsort = 0;
p = ap;
for (i = 0; i < num; i++, p++) {
for (j = 0 ; j < _res.nsort; j++)
if (_res.sort_list[j].addr.s_addr ==
(((struct in_addr *)(*p))->s_addr & _res.sort_list[j].mask))
break;
aval[i] = j;
if (needsort == 0 && i > 0 && j < aval[i-1])
needsort = i;
}
if (!needsort)
return;
while (needsort < num) {
for (j = needsort - 1; j >= 0; j--) {
if (aval[j] > aval[j+1]) {
char *hp;
i = aval[j];
aval[j] = aval[j+1];
aval[j+1] = i;
hp = ap[j];
ap[j] = ap[j+1];
ap[j+1] = hp;
} else
break;
}
needsort++;
}
}
#endif
static struct hostent *
gethostanswer(answer, anslen, qname, qclass, qtype)
const querybuf *answer;
int anslen;
const char *qname;
int qclass, qtype;
{
register const HEADER *hp;
register const u_char *cp;
register int n;
const u_char *eom;
char *bp, **ap, **hap;
int type, class, buflen, ancount, qdcount;
int haveanswer, had_error;
int toobig = 0;
char tbuf[MAXDNAME+1];
host.h_name = NULL;
eom = answer->buf + anslen;
/*
* find first satisfactory answer
*/
hp = &answer->hdr;
ancount = ntohs(hp->ancount);
qdcount = ntohs(hp->qdcount);
bp = hostbuf;
buflen = sizeof hostbuf;
cp = answer->buf + HFIXEDSZ;
if (qdcount != 1) {
h_errno = NO_RECOVERY;
return (NULL);
}
if ((n = dn_expand(answer->buf, eom, cp, bp, buflen)) < 0) {
h_errno = NO_RECOVERY;
return (NULL);
}
cp += n + QFIXEDSZ;
if (qtype == T_A) {
/* res_send() has already verified that the query name is the
* same as the one we sent; this just gets the expanded name
* (i.e., with the succeeding search-domain tacked on).
*/
n = strlen(bp) + 1; /* for the \0 */
host.h_name = bp;
bp += n;
buflen -= n;
/* The qname can be abbreviated, but h_name is now absolute. */
qname = host.h_name;
}
ap = host_aliases;
*ap = NULL;
host.h_aliases = host_aliases;
hap = h_addr_ptrs;
*hap = NULL;
host.h_addr_list = h_addr_ptrs;
haveanswer = 0;
had_error = 0;
while (ancount-- > 0 && cp < eom && !had_error) {
n = dn_expand(answer->buf, eom, cp, bp, buflen);
if (n < 0) {
had_error++;
continue;
}
cp += n; /* name */
type = _getshort(cp);
cp += INT16SZ; /* type */
class = _getshort(cp);
cp += INT16SZ + INT32SZ; /* class, TTL */
n = _getshort(cp);
cp += INT16SZ; /* len */
if (class != qclass) {
/* XXX - debug? syslog? */
cp += n;
continue; /* XXX - had_error++ ? */
}
if (qtype == T_A && type == T_CNAME) {
if (ap >= &host_aliases[MAXALIASES-1])
continue;
n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
if (n < 0) {
had_error++;
continue;
}
cp += n;
if (host.h_name && strcasecmp(host.h_name, bp) != 0) {
syslog(LOG_NOTICE|LOG_AUTH,
"gethostby*.getanswer: asked for \"%s\", got CNAME for \"%s\"",
host.h_name, bp);
continue; /* XXX - had_error++ ? */
}
/* Store alias. */
*ap++ = bp;
n = strlen(bp) + 1; /* for the \0 */
bp += n;
buflen -= n;
/* Get canonical name. */
n = strlen(tbuf) + 1; /* for the \0 */
if (n > buflen) {
had_error++;
continue;
}
strcpy(bp, tbuf);
host.h_name = bp;
bp += n;
buflen -= n;
continue;
}
if (type != qtype) {
syslog(LOG_NOTICE|LOG_AUTH,
"gethostby*.getanswer: asked for type %d(%s), got %d(%s)",
qtype, qname, type, bp);
cp += n;
continue; /* XXX - had_error++ ? */
}
switch (type) {
case T_PTR:
if (strcasecmp(qname, bp) != 0) {
syslog(LOG_NOTICE|LOG_AUTH,
AskedForGot, qname, bp);
cp += n;
continue; /* XXX - had_error++ ? */
}
n = dn_expand(answer->buf, eom, cp, bp, buflen);
if (n < 0) {
had_error++;
break;
}
#if MULTI_PTRS_ARE_ALIASES
cp += n;
if (!haveanswer)
host.h_name = bp;
else if (ap < &host_aliases[MAXALIASES-1])
*ap++ = bp;
else
n = -1;
if (n != -1) {
n = strlen(bp) + 1; /* for the \0 */
bp += n;
buflen -= n;
}
break;
#else
host.h_name = bp;
return (&host);
#endif
case T_A:
if (strcasecmp(host.h_name, bp) != 0) {
syslog(LOG_NOTICE|LOG_AUTH,
AskedForGot, host.h_name, bp);
cp += n;
continue; /* XXX - had_error++ ? */
}
if (haveanswer) {
if (n != host.h_length) {
cp += n;
continue;
}
} else {
register int nn;
host.h_length = n;
host.h_addrtype = (class == C_IN)
? AF_INET
: AF_UNSPEC;
host.h_name = bp;
nn = strlen(bp) + 1; /* for the \0 */
bp += nn;
buflen -= nn;
}
bp += sizeof(align) - ((u_long)bp % sizeof(align));
if (bp + n >= &hostbuf[sizeof hostbuf]) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("size (%d) too big\n", n);
#endif
had_error++;
continue;
}
if (hap >= &h_addr_ptrs[MAXADDRS-1]) {
if (_res.options & RES_DEBUG && !toobig++)
printf("Too many addresses (%d)\n",
MAXADDRS);
cp += n;
continue;
}
bcopy(cp, *hap++ = bp, n);
bp += n;
cp += n;
break;
default:
abort();
} /*switch*/
if (!had_error)
haveanswer++;
} /*while*/
if (haveanswer) {
*ap = NULL;
*hap = NULL;
# if defined(RESOLVSORT)
/*
* Note: we sort even if host can take only one address
* in its return structures - should give it the "best"
* address in that case, not some random one
*/
if (_res.nsort && haveanswer > 1 &&
qclass == C_IN && qtype == T_A)
addrsort(h_addr_ptrs, haveanswer);
# endif /*RESOLVSORT*/
if (!host.h_name) {
n = strlen(qname) + 1; /* for the \0 */
strcpy(bp, qname);
host.h_name = bp;
}
return (&host);
} else {
h_errno = TRY_AGAIN;
return (NULL);
}
}
struct hostent *
_gethostbydnsname(name)
const char *name;
{
querybuf buf;
register const char *cp;
int n;
/*
* disallow names consisting only of digits/dots, unless
* they end in a dot.
*/
if (isdigit(name[0]))
for (cp = name;; ++cp) {
if (!*cp) {
if (*--cp == '.')
break;
/*
* All-numeric, no dot at the end.
* Fake up a hostent as if we'd actually
* done a lookup.
*/
if (!inet_aton(name, &host_addr)) {
h_errno = HOST_NOT_FOUND;
return (NULL);
}
host.h_name = (char *)name;
host.h_aliases = host_aliases;
host_aliases[0] = NULL;
host.h_addrtype = AF_INET;
host.h_length = INT32SZ;
h_addr_ptrs[0] = (char *)&host_addr;
h_addr_ptrs[1] = NULL;
host.h_addr_list = h_addr_ptrs;
return (&host);
}
if (!isdigit(*cp) && *cp != '.')
break;
}
if ((n = res_search(name, C_IN, T_A, buf.buf, sizeof(buf))) < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_search failed\n");
#endif
return (NULL);
}
return (gethostanswer(&buf, n, name, C_IN, T_A));
}
struct hostent *
_gethostbydnsaddr(addr, len, type)
const char *addr;
int len, type;
{
int n;
querybuf buf;
register struct hostent *hp;
char qbuf[MAXDNAME+1];
if (type != AF_INET)
return (NULL);
(void)sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
((unsigned)addr[3] & 0xff),
((unsigned)addr[2] & 0xff),
((unsigned)addr[1] & 0xff),
((unsigned)addr[0] & 0xff));
n = res_query(qbuf, C_IN, T_PTR, (u_char *)buf.buf, sizeof buf.buf);
if (n < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
#endif
return (NULL);
}
if (!(hp = gethostanswer(&buf, n, qbuf, C_IN, T_PTR)))
return (NULL);
hp->h_addrtype = type;
hp->h_length = len;
h_addr_ptrs[0] = (char *)&host_addr;
h_addr_ptrs[1] = NULL;
host_addr = *(struct in_addr *)addr;
#if BSD < 43 && !defined(h_addr) /* new-style hostent structure */
hp->h_addr = h_addr_ptrs[0];
#endif
return (hp);
}
void
_sethostdnsent(stayopen)
int stayopen;
{
if (stayopen)
_res.options |= RES_STAYOPEN | RES_USEVC;
}
void
_endhostdnsent()
{
_res.options &= ~(RES_STAYOPEN | RES_USEVC);
_res_close();
}

182
lib/libc/net/gethostbyht.c Normal file
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@ -0,0 +1,182 @@
/*-
* Copyright (c) 1985, 1988, 1993
* 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--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: gethostnamadr.c,v 1.1 1994/05/27 04:57:16 rgrimes Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define MAXALIASES 35
#define MAXADDRS 35
static struct hostent host;
static char *host_aliases[MAXALIASES];
static char hostbuf[BUFSIZ+1];
static FILE *hostf = NULL;
static char hostaddr[MAXADDRS];
static char *host_addrs[2];
static int stayopen = 0;
void
_sethosthtent(f)
int f;
{
if (hostf == NULL)
hostf = fopen(_PATH_HOSTS, "r" );
else
rewind(hostf);
stayopen |= f;
}
void
_endhosthtent()
{
if (hostf && !stayopen) {
(void) fclose(hostf);
hostf = NULL;
}
}
struct hostent *
gethostent()
{
char *p;
register char *cp, **q;
if (hostf == NULL && (hostf = fopen(_PATH_HOSTS, "r" )) == NULL)
return (NULL);
again:
if ((p = fgets(hostbuf, BUFSIZ, hostf)) == NULL)
return (NULL);
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
/* THIS STUFF IS INTERNET SPECIFIC */
host.h_addr_list = host_addrs;
host.h_addr = hostaddr;
*((u_int32_t *)host.h_addr) = inet_addr(p);
host.h_length = sizeof (u_int32_t);
host.h_addrtype = AF_INET;
while (*cp == ' ' || *cp == '\t')
cp++;
host.h_name = cp;
q = host.h_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&host);
}
struct hostent *
_gethostbyhtname(name)
char *name;
{
register struct hostent *p;
register char **cp;
sethostent(0);
while ((p = gethostent())) {
if (strcasecmp(p->h_name, name) == 0)
break;
for (cp = p->h_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
endhostent();
return (p);
}
struct hostent *
_gethostbyhtaddr(addr, len, type)
const char *addr;
int len, type;
{
register struct hostent *p;
sethostent(0);
while ((p = gethostent()))
if (p->h_addrtype == type && !bcmp(p->h_addr, addr, len))
break;
endhostent();
return (p);
}

115
lib/libc/net/gethostbynis.c Normal file
View File

@ -0,0 +1,115 @@
/*-
* Copyright (c) 1994, Garrett Wollman
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)$Id$";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define MAXALIASES 35
#define MAXADDRS 35
#ifdef YP
static char *host_aliases[MAXALIASES];
static char hostaddr[MAXADDRS];
static char *host_addrs[2];
#endif /* YP */
static struct hostent *
_gethostbynis(name, map)
char *name, *map;
{
#ifdef YP
register char *cp, **q;
char *result;
int resultlen;
static struct hostent h;
static char *domain = (char *)NULL;
if (domain == (char *)NULL)
if (yp_get_default_domain (&domain))
return ((struct hostent *)NULL);
if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
return ((struct hostent *)NULL);
if ((cp = index(result, '\n')))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
h.h_addr_list = host_addrs;
h.h_addr = hostaddr;
*((u_long *)h.h_addr) = inet_addr(result);
h.h_length = sizeof(u_long);
h.h_addrtype = AF_INET;
while (*cp == ' ' || *cp == '\t')
cp++;
h.h_name = cp;
q = h.h_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&h);
#else
return (NULL);
#endif /* YP */
}
struct hostent *
_gethostbynisname(name)
char *name;
{
return _gethostbynis(name, "hosts.byname");
}
struct hostent *
_gethostbynisaddr(name)
char *name;
{
return _gethostbynis(name, "hosts.byaddr");
}

522
lib/libc/net/gethostnamadr.c
View File

@ -1,6 +1,5 @@
/*-
* Copyright (c) 1985, 1988, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1994, Garrett Wollman
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -10,15 +9,8 @@
* 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
* THIS SOFTWARE IS PROVIDED BY THE 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
@ -29,49 +21,29 @@
* 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--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "From: @(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
/*static char rcsid[] = "From: Id: gethnamaddr.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";*/
static const char rcsid[] =
"$Id: gethostnamadr.c,v 1.3 1994/08/09 22:44:12 wollman Exp $";
static char sccsid[] = "@(#)$Id$";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define MAXALIASES 35
#define MAXADDRS 35
extern struct hostent * _gethostbyhtname __P((const char *));
extern struct hostent * _gethostbydnsname __P((const char *));
extern struct hostent * _gethostbynisname __P((const char *));
extern struct hostent * _gethostbyhtaddr __P((const char *, int, int));
extern struct hostent * _gethostbydnsaddr __P((const char *, int, int));
extern struct hostent * _gethostbynisaddr __P((const char *, int, int));
#define _PATH_HOSTCONF "/etc/host.conf"
@ -102,35 +74,6 @@ static struct {
static enum service_type service_order[SERVICE_MAX + 1];
static int service_done = 0;
static char *h_addr_ptrs[MAXADDRS + 1];
static struct hostent host;
static char *host_aliases[MAXALIASES];
static char hostbuf[BUFSIZ+1];
static struct in_addr host_addr;
static FILE *hostf = NULL;
static char hostaddr[MAXADDRS];
static char *host_addrs[2];
static int stayopen = 0;
#if PACKETSZ > 1024
#define MAXPACKET PACKETSZ
#else
#define MAXPACKET 1024
#endif
typedef union {
HEADER hdr;
u_char buf[MAXPACKET];
} querybuf;
typedef union {
int32_t al;
char ac;
} align;
extern int h_errno;
static enum service_type
get_service_name(const char *name) {
int i;
@ -174,429 +117,27 @@ init_services()
service_done = 1;
}
static struct hostent *
getanswer(answer, anslen, iquery)
querybuf *answer;
int anslen;
int iquery;
{
register HEADER *hp;
register u_char *cp;
register int n;
u_char *eom;
char *bp, **ap;
int type, class, buflen, ancount, qdcount;
int haveanswer, getclass = C_ANY;
char **hap;
eom = answer->buf + anslen;
/*
* find first satisfactory answer
*/
hp = &answer->hdr;
ancount = ntohs(hp->ancount);
qdcount = ntohs(hp->qdcount);
bp = hostbuf;
buflen = sizeof(hostbuf);
cp = answer->buf + sizeof(HEADER);
if (qdcount) {
if (iquery) {
if ((n = dn_expand((u_char *)answer->buf,
(u_char *)eom, (u_char *)cp, (u_char *)bp,
buflen)) < 0) {
h_errno = NO_RECOVERY;
return ((struct hostent *) NULL);
}
cp += n + QFIXEDSZ;
host.h_name = bp;
n = strlen(bp) + 1;
bp += n;
buflen -= n;
} else
cp += __dn_skipname(cp, eom) + QFIXEDSZ;
while (--qdcount > 0)
cp += __dn_skipname(cp, eom) + QFIXEDSZ;
} else if (iquery) {
if (hp->aa)
h_errno = HOST_NOT_FOUND;
else
h_errno = TRY_AGAIN;
return ((struct hostent *) NULL);
}
ap = host_aliases;
*ap = NULL;
host.h_aliases = host_aliases;
hap = h_addr_ptrs;
*hap = NULL;
#if BSD >= 43 || defined(h_addr) /* new-style hostent structure */
host.h_addr_list = h_addr_ptrs;
#endif
haveanswer = 0;
while (--ancount >= 0 && cp < eom) {
if ((n = dn_expand((u_char *)answer->buf, (u_char *)eom,
(u_char *)cp, (u_char *)bp, buflen)) < 0)
break;
cp += n;
type = _getshort(cp);
cp += sizeof(u_int16_t);
class = _getshort(cp);
cp += sizeof(u_int16_t) + sizeof(u_int32_t);
n = _getshort(cp);
cp += sizeof(u_int16_t);
if (type == T_CNAME) {
cp += n;
if (ap >= &host_aliases[MAXALIASES-1])
continue;
*ap++ = bp;
n = strlen(bp) + 1;
bp += n;
buflen -= n;
continue;
}
if (iquery && type == T_PTR) {
if ((n = dn_expand((u_char *)answer->buf,
(u_char *)eom, (u_char *)cp, (u_char *)bp,
buflen)) < 0)
break;
cp += n;
host.h_name = bp;
return(&host);
}
if (iquery || type != T_A) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("unexpected answer type %d, size %d\n",
type, n);
#endif
cp += n;
continue;
}
if (haveanswer) {
if (n != host.h_length) {
cp += n;
continue;
}
if (class != getclass) {
cp += n;
continue;
}
} else {
host.h_length = n;
getclass = class;
host.h_addrtype = (class == C_IN) ? AF_INET : AF_UNSPEC;
if (!iquery) {
host.h_name = bp;
bp += strlen(bp) + 1;
}
}
bp += sizeof(align) - ((u_int32_t)bp % sizeof(align));
if (bp + n >= &hostbuf[sizeof(hostbuf)]) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("size (%d) too big\n", n);
#endif
break;
}
bcopy(cp, *hap++ = bp, n);
bp +=n;
cp += n;
haveanswer++;
}
if (haveanswer) {
*ap = NULL;
#if BSD >= 43 || defined(h_addr) /* new-style hostent structure */
*hap = NULL;
#else
host.h_addr = h_addr_ptrs[0];
#endif
return (&host);
} else {
h_errno = TRY_AGAIN;
return ((struct hostent *) NULL);
}
}
struct hostent *
_getdnsbyname(name)
const char *name;
{
querybuf buf;
register const char *cp;
int n;
extern struct hostent *_gethtbyname();
/*
* disallow names consisting only of digits/dots, unless
* they end in a dot.
*/
if (isdigit(name[0]))
for (cp = name;; ++cp) {
if (!*cp) {
if (*--cp == '.')
break;
/*
* All-numeric, no dot at the end.
* Fake up a hostent as if we'd actually
* done a lookup.
*/
if (!inet_aton(name, &host_addr)) {
h_errno = HOST_NOT_FOUND;
return((struct hostent *) NULL);
}
host.h_name = (char *)name;
host.h_aliases = host_aliases;
host_aliases[0] = NULL;
host.h_addrtype = AF_INET;
host.h_length = sizeof(u_int32_t);
h_addr_ptrs[0] = (char *)&host_addr;
h_addr_ptrs[1] = (char *)0;
#if BSD >= 43 || defined(h_addr) /* new-style hostent structure */
host.h_addr_list = h_addr_ptrs;
#else
host.h_addr = h_addr_ptrs[0];
#endif
return (&host);
}
if (!isdigit(*cp) && *cp != '.')
break;
}
if ((n = res_search(name, C_IN, T_A, buf.buf, sizeof(buf))) < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_search failed\n");
#endif
return ((struct hostent *) NULL);
}
return (getanswer(&buf, n, 0));
}
struct hostent *
_getdnsbyaddr(addr, len, type)
const char *addr;
int len, type;
{
int n;
querybuf buf;
register struct hostent *hp;
char qbuf[MAXDNAME];
extern struct hostent *_gethtbyaddr();
if (type != AF_INET)
return ((struct hostent *) NULL);
(void)sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
((unsigned)addr[3] & 0xff),
((unsigned)addr[2] & 0xff),
((unsigned)addr[1] & 0xff),
((unsigned)addr[0] & 0xff));
n = res_query(qbuf, C_IN, T_PTR, (char *)&buf, sizeof(buf));
if (n < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
#endif
return ((struct hostent *) NULL);
}
hp = getanswer(&buf, n, 1);
if (hp == NULL)
return ((struct hostent *) NULL);
hp->h_addrtype = type;
hp->h_length = len;
h_addr_ptrs[0] = (char *)&host_addr;
h_addr_ptrs[1] = (char *)0;
host_addr = *(struct in_addr *)addr;
#if BSD < 43 && !defined(h_addr) /* new-style hostent structure */
hp->h_addr = h_addr_ptrs[0];
#endif
return(hp);
}
void
_sethtent(f)
int f;
{
if (hostf == NULL)
hostf = fopen(_PATH_HOSTS, "r" );
else
rewind(hostf);
stayopen |= f;
}
void
_endhtent()
{
if (hostf && !stayopen) {
(void) fclose(hostf);
hostf = NULL;
}
}
struct hostent *
_gethtent()
{
char *p;
register char *cp, **q;
if (hostf == NULL && (hostf = fopen(_PATH_HOSTS, "r" )) == NULL)
return (NULL);
again:
if ((p = fgets(hostbuf, BUFSIZ, hostf)) == NULL)
return (NULL);
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
/* THIS STUFF IS INTERNET SPECIFIC */
#if BSD >= 43 || defined(h_addr) /* new-style hostent structure */
host.h_addr_list = host_addrs;
#endif
host.h_addr = hostaddr;
*((u_int32_t *)host.h_addr) = inet_addr(p);
host.h_length = sizeof (u_int32_t);
host.h_addrtype = AF_INET;
while (*cp == ' ' || *cp == '\t')
cp++;
host.h_name = cp;
q = host.h_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&host);
}
struct hostent *
_gethtbyname(name)
char *name;
{
register struct hostent *p;
register char **cp;
_sethtent(0);
while (p = _gethtent()) {
if (strcasecmp(p->h_name, name) == 0)
break;
for (cp = p->h_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
_endhtent();
return (p);
}
struct hostent *
_gethtbyaddr(addr, len, type)
const char *addr;
int len, type;
{
register struct hostent *p;
_sethtent(0);
while (p = _gethtent())
if (p->h_addrtype == type && !bcmp(p->h_addr, addr, len))
break;
_endhtent();
return (p);
}
#ifdef YP
struct hostent *
_getnishost(name, map)
char *name, *map;
{
register char *cp, *dp, **q;
char *result;
int resultlen;
static struct hostent h;
static char *domain = (char *)NULL;
if (domain == (char *)NULL)
if (yp_get_default_domain (&domain))
return ((struct hostent *)NULL);
if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
return ((struct hostent *)NULL);
if (cp = index(result, '\n'))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
#if BSD >= 43 || defined(h_addr) /* new-style hostent structure */
h.h_addr_list = host_addrs;
#endif
h.h_addr = hostaddr;
*((u_long *)h.h_addr) = inet_addr(result);
h.h_length = sizeof(u_long);
h.h_addrtype = AF_INET;
while (*cp == ' ' || *cp == '\t')
cp++;
h.h_name = cp;
q = h.h_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&h);
}
#endif /* YP */
struct hostent *
gethostbyname(const char *name)
{
struct hostent *hp = 0;
int nserv = 0;
if(!service_done) {
if (!service_done)
init_services();
}
while(!hp) {
switch(service_order[nserv]) {
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return 0;
return NULL;
case SERVICE_HOSTS:
hp = _gethtbyname(name);
hp = _gethostbyhtname(name);
break;
case SERVICE_BIND:
hp = _getdnsbyname(name);
hp = _gethostbydnsname(name);
break;
case SERVICE_NIS:
#ifdef YP
hp = _getnishost(name, "hosts.byname");
#endif
hp = _gethostbynisname(name);
break;
}
nserv++;
@ -610,24 +151,21 @@ gethostbyaddr(const char *addr, int len, int type)
struct hostent *hp = 0;
int nserv = 0;
if(!service_done) {
if (!service_done)
init_services();
}
while(!hp) {
switch(service_order[nserv]) {
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return 0;
case SERVICE_HOSTS:
hp = _gethtbyaddr(addr, len, type);
hp = _gethostbyhtaddr(addr, len, type);
break;
case SERVICE_BIND:
hp = _getdnsbyaddr(addr, len, type);
hp = _gethostbydnsaddr(addr, len, type);
break;
case SERVICE_NIS:
#ifdef YP
hp = _getnishost(addr, "hosts.byaddr");
#endif
hp = _gethostbynisaddr(addr, len, type);
break;
}
nserv++;
@ -635,3 +173,17 @@ gethostbyaddr(const char *addr, int len, int type)
return hp;
}
void
sethostent(stayopen)
int stayopen;
{
_sethosthtent(stayopen);
_sethostdnsent(stayopen);
}
void
endhostent()
{
_endhosthtent();
_endhostdnsent();
}

308
lib/libc/net/getnetbydns.c Normal file
View File

@ -0,0 +1,308 @@
/*-
* Copyright (c) 1985, 1988, 1993
* 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--
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <syslog.h>
#define BYNAME 0
#define BYADDR 1
#define MAXALIASES 35
#define MAXADDRS 35
#if PACKETSZ > 1024
#define MAXPACKET PACKETSZ
#else
#define MAXPACKET 1024
#endif
typedef union {
HEADER hdr;
u_char buf[MAXPACKET];
} querybuf;
typedef union {
int32_t al;
char ac;
} align;
extern int h_errno;
static struct netent *
getnetanswer(answer, anslen, net_i)
querybuf *answer;
int anslen;
int net_i;
{
register HEADER *hp;
register u_char *cp;
register int n;
u_char *eom;
int type, class, buflen, ancount, qdcount,
haveanswer, i, nchar;
char aux1[30], aux2[30], ans[30],
*in, *st, *pauxt, *bp, **ap,
*paux1 = &aux1[0],
*paux2 = &aux2[0],
flag = 0;
static struct netent net_entry;
static char *net_aliases[MAXALIASES],
netbuf[BUFSIZ+1];
/*
* find first satisfactory answer
*
* answer --> +------------+ ( MESSAGE )
* | Header |
* +------------+
* | Question | the question for the name server
* +------------+
* | Answer | RRs answering the question
* +------------+
* | Authority | RRs pointing toward an authority
* | Additional | RRs holding additional information
* +------------+
*/
eom = answer->buf + anslen;
hp = &answer->hdr;
ancount = ntohs(hp->ancount); /* #/records in the answer section */
qdcount = ntohs(hp->qdcount); /* #/entries in the question section */
bp = netbuf;
buflen = sizeof(netbuf);
cp = answer->buf + HFIXEDSZ;
if (!qdcount) {
if (hp->aa)
h_errno = HOST_NOT_FOUND;
else
h_errno = TRY_AGAIN;
return ((struct netent *) NULL);
}
while (qdcount-- > 0){
cp += __dn_skipname(cp, eom) + QFIXEDSZ;
}
ap = net_aliases;
*ap = NULL;
net_entry.n_aliases = net_aliases;
haveanswer = 0;
while (--ancount >= 0 && cp < eom) {
n = dn_expand(answer->buf, eom, cp, bp, buflen);
if (n < 0)
break;
cp += n;
ans[0] = '\0';
(void)strcpy(&ans[0], bp);
GETSHORT(type, cp);
GETSHORT(class, cp);
cp += INT32SZ; /* TTL */
GETSHORT(n, cp);
if (class == C_IN && type == T_PTR) {
n = dn_expand(answer->buf, eom, cp, bp, buflen);
if (n < 0) {
cp += n;
return (NULL);
}
cp += n;
*ap++ = bp;
bp += (strlen(bp) + 1);
net_entry.n_addrtype = (class == C_IN)
? AF_INET
: AF_UNSPEC;
haveanswer++;
}
}
if (haveanswer) {
*ap = NULL;
switch (net_i) {
case BYADDR :
net_entry.n_name = *net_entry.n_aliases;
net_entry.n_net = 0L;
break;
case BYNAME :
in = *net_entry.n_aliases;
net_entry.n_name = &ans[0];
aux2[0] = '\0';
for (i = 0; i < 4; i++) {
for (st = in, nchar = 0;
*st != '.';
st++, nchar++)
;
if (nchar != 1 || *in != '0' || flag) {
flag = 1;
(void)strncpy(paux1,
(i==0) ?in :in-1,
(i==0) ?nchar :nchar+1);
paux1[(i==0) ?nchar :nchar+1] = '\0';
pauxt = paux2;
paux2 = strcat(paux1, paux2);
paux1 = pauxt;
}
in = ++st;
}
net_entry.n_net = inet_network(paux2);
}
net_entry.n_aliases++;
return (&net_entry);
} else {
h_errno = TRY_AGAIN;
return ((struct netent *) NULL);
}
}
struct netent *
_getnetbydnsaddr(net, net_type)
register long net;
register int net_type;
{
unsigned int netbr[4];
int nn, anslen;
querybuf buf;
char qbuf[MAXDNAME];
unsigned long net2;
struct netent *net_entry;
if (net_type != AF_INET)
return (NULL);
for (nn = 4, net2 = net; net2; net2 >>= 8) {
netbr[--nn] = net2 & 0xff;
}
switch (nn) {
case 3: /* Class A */
(void)sprintf(qbuf, "0.0.0.%u.in-addr.arpa",
netbr[3]);
break;
case 2: /* Class B */
(void)sprintf(qbuf, "0.0.%u.%u.in-addr.arpa",
netbr[3], netbr[2]);
break;
case 1: /* Class C */
(void)sprintf(qbuf, "0.%u.%u.%u.in-addr.arpa",
netbr[3], netbr[2], netbr[1]);
break;
case 0: /* Class D - E */
(void)sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
netbr[3], netbr[2], netbr[1], netbr[0]);
break;
}
anslen = res_query(qbuf, C_IN, T_PTR, buf.buf, sizeof buf.buf);
if (anslen < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
#endif
return (NULL);
}
net_entry = getnetanswer(&buf, anslen, BYADDR);
if (net_entry) {
unsigned u_net = net; /* maybe net should be unsigned ? */
/* Strip trailing zeros */
while ((u_net & 0xff) == 0 && u_net != 0) {
u_net >>= 8;
}
net_entry->n_net = u_net;
}
return (net_entry);
}
struct netent *
_getnetbydnsname(net)
register const char *net;
{
int anslen;
querybuf buf;
char qbuf[MAXDNAME];
(void)strcpy(&qbuf[0],net);
anslen = res_search(qbuf, C_IN, T_PTR, buf.buf, sizeof buf.buf);
if (anslen < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
#endif
return NULL;
}
return getnetanswer(&buf, anslen, BYNAME);
}
void
_setnetdnsent(stayopen)
int stayopen;
{
if (stayopen)
_res.options |= RES_STAYOPEN | RES_USEVC;
}
void
_endnetdnsent()
{
_res.options &= ~(RES_STAYOPEN | RES_USEVC);
_res_close();
}

159
lib/libc/net/getnetbyht.c Normal file
View File

@ -0,0 +1,159 @@
/*
* Copyright (c) 1983, 1993
* 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#define MAXALIASES 35
static FILE *netf;
static char line[BUFSIZ+1];
static struct netent net;
static char *net_aliases[MAXALIASES];
static int _net_stayopen;
void
_setnethtent(f)
int f;
{
if (netf == NULL)
netf = fopen(_PATH_NETWORKS, "r" );
else
rewind(netf);
_net_stayopen |= f;
}
void
_endnethtent()
{
if (netf) {
fclose(netf);
netf = NULL;
}
_net_stayopen = 0;
}
struct netent *
getnetent()
{
char *p;
register char *cp, **q;
if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
return (NULL);
again:
p = fgets(line, BUFSIZ, netf);
if (p == NULL)
return (NULL);
if (*p == '#')
goto again;
cp = strpbrk(p, "#\n");
if (cp == NULL)
goto again;
*cp = '\0';
net.n_name = p;
cp = strpbrk(p, " \t");
if (cp == NULL)
goto again;
*cp++ = '\0';
while (*cp == ' ' || *cp == '\t')
cp++;
p = strpbrk(cp, " \t");
if (p != NULL)
*p++ = '\0';
net.n_net = inet_network(cp);
net.n_addrtype = AF_INET;
q = net.n_aliases = net_aliases;
if (p != NULL)
cp = p;
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &net_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&net);
}
struct netent *
_getnetbyhtname(name)
register const char *name;
{
register struct netent *p;
register char **cp;
setnetent(_net_stayopen);
while ((p = getnetent())) {
if (strcasecmp(p->n_name, name) == 0)
break;
for (cp = p->n_aliases; *cp != 0; cp++)
if (strcasecmp(*cp, name) == 0)
goto found;
}
found:
if (!_net_stayopen)
endnetent();
return (p);
}
struct netent *
_getnetbyhtaddr(net, type)
register long net;
register int type;
{
register struct netent *p;
setnetent(_net_stayopen);
while ((p = getnetent()))
if (p->n_addrtype == type && p->n_net == net)
break;
if (!_net_stayopen)
endnetent();
return (p);
}

117
lib/libc/net/getnetbynis.c Normal file
View File

@ -0,0 +1,117 @@
/*-
* Copyright (c) 1994, Garrett Wollman
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)$Id$";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#define MAXALIASES 35
#define MAXADDRS 35
#ifdef YP
static char *host_aliases[MAXALIASES];
#endif /* YP */
static struct netent *
_getnetbynis(name, map)
char *name, *map;
{
#ifdef YP
register char *cp, **q;
char *result;
int resultlen;
static struct netent h;
static char *domain = (char *)NULL;
if (domain == (char *)NULL)
if (yp_get_default_domain (&domain))
return (NULL);
if (yp_match(domain, map, name, strlen(name), &result, &resultlen))
return (NULL);
if ((cp = index(result, '\n')))
*cp = '\0';
cp = strpbrk(result, " \t");
*cp++ = '\0';
h.n_net = inet_addr(result);
h.n_addrtype = AF_INET;
while (*cp == ' ' || *cp == '\t')
cp++;
h.n_name = cp;
q = h.n_aliases = host_aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (q < &host_aliases[MAXALIASES - 1])
*q++ = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
*q = NULL;
return (&h);
#else
return (NULL);
#endif
}
struct netent *
_getnetbynisname(name)
char *name;
{
return _getnetbynis(name, "networks.byname");
}
struct netent *
_getnetbynisaddr(addr, type)
long addr;
int type;
{
struct in_addr in;
if (type != AF_INET)
return (NULL);
in.s_addr = addr;
return _getnetbynis(inet_ntoa(in), "networks.byaddr");
}

190
lib/libc/net/getnetnamadr.c Normal file
View File

@ -0,0 +1,190 @@
/*-
* Copyright (c) 1994, Garrett Wollman
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)$Id$";
static char rcsid[] = "$Id$";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
extern struct netent * _getnetbyhtname __P((const char *));
extern struct netent * _getnetbydnsname __P((const char *));
extern struct netent * _getnetbynisname __P((const char *));
extern struct netent * _getnetbyhtaddr __P((long, int));
extern struct netent * _getnetbydnsaddr __P((long, int));
extern struct netent * _getnetbynisaddr __P((long, int));
#define _PATH_NETCONF "/etc/net.conf"
enum service_type {
SERVICE_NONE = 0,
SERVICE_BIND,
SERVICE_TABLE,
SERVICE_NIS };
#define SERVICE_MAX SERVICE_NIS
static struct {
const char *name;
enum service_type type;
} service_names[] = {
{ "nets", SERVICE_TABLE },
{ "/etc/nets", SERVICE_TABLE },
{ "nettable", SERVICE_TABLE },
{ "ntable", SERVICE_TABLE },
{ "bind", SERVICE_BIND },
{ "dns", SERVICE_BIND },
{ "domain", SERVICE_BIND },
{ "yp", SERVICE_NIS },
{ "yellowpages", SERVICE_NIS },
{ "nis", SERVICE_NIS },
{ 0, SERVICE_NONE }
};
static enum service_type service_order[SERVICE_MAX + 1];
static int service_done = 0;
static enum service_type
get_service_name(const char *name) {
int i;
for(i = 0; service_names[i].type != SERVICE_NONE; i++) {
if(!strcasecmp(name, service_names[i].name)) {
return service_names[i].type;
}
}
return SERVICE_NONE;
}
static void
init_services()
{
char *cp, buf[BUFSIZ];
register int cc = 0;
FILE *fd;
if ((fd = (FILE *)fopen(_PATH_NETCONF, "r")) == NULL) {
/* make some assumptions */
service_order[0] = SERVICE_TABLE;
service_order[1] = SERVICE_NONE;
} else {
while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) {
if(buf[0] == '#')
continue;
cp = strtok(buf, "\n \t,:;");
do {
if(!isalpha(cp[0])) continue;
service_order[cc] = get_service_name(buf);
if(service_order[cc] != SERVICE_NONE)
cc++;
} while((cp = strtok((char *)0, "\n \t,:;"))
&& (cc < SERVICE_MAX));
}
service_order[cc] = SERVICE_NONE;
fclose(fd);
}
service_done = 1;
}
struct netent *
getnetbyname(const char *name)
{
struct netent *hp = 0;
int nserv = 0;
if (!service_done)
init_services();
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return NULL;
case SERVICE_TABLE:
hp = _getnetbyhtname(name);
break;
case SERVICE_BIND:
hp = _getnetbydnsname(name);
break;
case SERVICE_NIS:
hp = _getnetbynisname(name);
break;
}
nserv++;
}
return hp;
}
struct netent *
getnetbyaddr(addr, type)
long addr;
int type;
{
struct netent *hp = 0;
int nserv = 0;
if (!service_done)
init_services();
while (!hp) {
switch (service_order[nserv]) {
case SERVICE_NONE:
return 0;
case SERVICE_TABLE:
hp = _getnetbyhtaddr(addr, type);
break;
case SERVICE_BIND:
hp = _getnetbydnsaddr(addr, type);
break;
case SERVICE_NIS:
hp = _getnetbynisaddr(addr, type);
break;
}
nserv++;
}
return hp;
}
void
setnetent(stayopen)
int stayopen;
{
_setnethtent(stayopen);
_setnetdnsent(stayopen);
}
void
endnetent()
{
_endnethtent();
_endnetdnsent();
}

72
lib/libc/net/res_comp.c
View File

@ -53,16 +53,22 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_comp.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: res_comp.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $";
static char rcsid[] = "$Id: res_comp.c,v 4.9.1.11 1994/07/23 23:24:11 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <arpa/nameser.h>
#include <netinet/in.h>
#include <resolv.h>
#include <stdio.h>
#include <arpa/nameser.h>
static int dn_find();
#include <stdio.h>
#include <resolv.h>
#include <ctype.h>
#include <unistd.h>
#include <string.h>
static int dn_find __P((u_char *exp_dn, u_char *msg,
u_char **dnptrs, u_char **lastdnptr));
/*
* Expand compressed domain name 'comp_dn' to full domain name.
@ -71,23 +77,25 @@ static int dn_find();
* 'exp_dn' is a pointer to a buffer of size 'length' for the result.
* Return size of compressed name or -1 if there was an error.
*/
int
dn_expand(msg, eomorig, comp_dn, exp_dn, length)
const u_char *msg, *eomorig, *comp_dn;
u_char *exp_dn;
char *exp_dn;
int length;
{
register u_char *cp, *dn;
register const u_char *cp;
register char *dn;
register int n, c;
u_char *eom;
char *eom;
int len = -1, checked = 0;
dn = exp_dn;
cp = (u_char *)comp_dn;
cp = comp_dn;
eom = exp_dn + length;
/*
* fetch next label in domain name
*/
while (n = *cp++) {
while ((n = *cp++)) {
/*
* Check for indirection
*/
@ -116,7 +124,7 @@ dn_expand(msg, eomorig, comp_dn, exp_dn, length)
case INDIR_MASK:
if (len < 0)
len = cp - comp_dn + 1;
cp = (u_char *)msg + (((n & 0x3f) << 8) | (*cp & 0xff));
cp = msg + (((n & 0x3f) << 8) | (*cp & 0xff));
if (cp < msg || cp >= eomorig) /* out of range */
return(-1);
checked += 2;
@ -134,6 +142,9 @@ dn_expand(msg, eomorig, comp_dn, exp_dn, length)
}
}
*dn = '\0';
for (dn = exp_dn; (c = *dn) != '\0'; dn++)
if (isascii(c) && isspace(c))
return (-1);
if (len < 0)
len = cp - comp_dn;
return (len);
@ -151,8 +162,9 @@ dn_expand(msg, eomorig, comp_dn, exp_dn, length)
* If 'dnptr' is NULL, we don't try to compress names. If 'lastdnptr'
* is NULL, we don't update the list.
*/
int
dn_comp(exp_dn, comp_dn, length, dnptrs, lastdnptr)
const u_char *exp_dn;
const char *exp_dn;
u_char *comp_dn, **dnptrs, **lastdnptr;
int length;
{
@ -164,6 +176,7 @@ dn_comp(exp_dn, comp_dn, length, dnptrs, lastdnptr)
dn = (u_char *)exp_dn;
cp = comp_dn;
eob = cp + length;
lpp = cpp = NULL;
if (dnptrs != NULL) {
if ((msg = *dnptrs++) != NULL) {
for (cpp = dnptrs; *cpp != NULL; cpp++)
@ -229,31 +242,44 @@ dn_comp(exp_dn, comp_dn, length, dnptrs, lastdnptr)
/*
* Skip over a compressed domain name. Return the size or -1.
*/
int
__dn_skipname(comp_dn, eom)
const u_char *comp_dn, *eom;
{
register u_char *cp;
register const u_char *cp;
register int n;
cp = (u_char *)comp_dn;
cp = comp_dn;
while (cp < eom && (n = *cp++)) {
/*
* check for indirection
*/
switch (n & INDIR_MASK) {
case 0: /* normal case, n == len */
case 0: /* normal case, n == len */
cp += n;
continue;
default: /* illegal type */
return (-1);
case INDIR_MASK: /* indirection */
cp++;
break;
default: /* illegal type */
return -1;
}
break;
}
if (cp > eom)
return -1;
return (cp - comp_dn);
}
static int
mklower(ch)
register int ch;
{
if (isascii(ch) && isupper(ch))
return (tolower(ch));
return (ch);
}
/*
* Search for expanded name from a list of previously compressed names.
* Return the offset from msg if found or -1.
@ -272,7 +298,7 @@ dn_find(exp_dn, msg, dnptrs, lastdnptr)
for (cpp = dnptrs; cpp < lastdnptr; cpp++) {
dn = exp_dn;
sp = cp = *cpp;
while (n = *cp++) {
while ((n = *cp++)) {
/*
* check for indirection
*/
@ -283,7 +309,7 @@ dn_find(exp_dn, msg, dnptrs, lastdnptr)
goto next;
if (*dn == '\\')
dn++;
if (*dn++ != *cp++)
if (mklower(*dn++) != mklower(*cp++))
goto next;
}
if ((n = *dn++) == '\0' && *cp == '\0')
@ -314,9 +340,9 @@ dn_find(exp_dn, msg, dnptrs, lastdnptr)
* used by sendmail.
*/
u_short
u_int16_t
_getshort(msgp)
register u_char *msgp;
register const u_char *msgp;
{
register u_int16_t u;
@ -326,7 +352,7 @@ _getshort(msgp)
u_int32_t
_getlong(msgp)
register u_char *msgp;
register const u_char *msgp;
{
register u_int32_t u;
@ -336,7 +362,7 @@ _getlong(msgp)
void
#if defined(__STDC__) || defined(__cplusplus)
__putshort(register u_short s, register u_char *msgp)
__putshort(register u_int16_t s, register u_char *msgp) /* must match proto */
#else
__putshort(s, msgp)
register u_int16_t s;

467
lib/libc/net/res_debug.c
View File

@ -53,22 +53,20 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: res_debug.c,v 4.9.1.16 1994/07/11 07:41:13 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netinet/in.h>
#include <netiso/iso.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <stdio.h>
#include <resolv.h>
#include <string.h>
void __fp_query();
char *__p_class(), *__p_time(), *__p_type();
char *p_cdname(), *p_fqname(), *p_rr();
static char *p_option __P((u_int32_t));
char *_res_opcodes[] = {
const char *_res_opcodes[] = {
"QUERY",
"IQUERY",
"CQUERYM",
@ -87,7 +85,7 @@ char *_res_opcodes[] = {
"ZONEREF",
};
char *_res_resultcodes[] = {
const char *_res_resultcodes[] = {
"NOERROR",
"FORMERR",
"SERVFAIL",
@ -108,110 +106,115 @@ char *_res_resultcodes[] = {
static char retbuf[16];
static char *
static const char *
dewks(wks)
int wks;
{
switch (wks) {
case 5: return("rje");
case 7: return("echo");
case 9: return("discard");
case 11: return("systat");
case 13: return("daytime");
case 15: return("netstat");
case 17: return("qotd");
case 19: return("chargen");
case 20: return("ftp-data");
case 21: return("ftp");
case 23: return("telnet");
case 25: return("smtp");
case 37: return("time");
case 39: return("rlp");
case 42: return("name");
case 43: return("whois");
case 53: return("domain");
case 57: return("apts");
case 59: return("apfs");
case 67: return("bootps");
case 68: return("bootpc");
case 69: return("tftp");
case 77: return("rje");
case 79: return("finger");
case 87: return("link");
case 95: return("supdup");
case 100: return("newacct");
case 101: return("hostnames");
case 102: return("iso-tsap");
case 103: return("x400");
case 104: return("x400-snd");
case 105: return("csnet-ns");
case 109: return("pop-2");
case 111: return("sunrpc");
case 113: return("auth");
case 115: return("sftp");
case 117: return("uucp-path");
case 119: return("nntp");
case 121: return("erpc");
case 123: return("ntp");
case 133: return("statsrv");
case 136: return("profile");
case 144: return("NeWS");
case 161: return("snmp");
case 162: return("snmp-trap");
case 170: return("print-srv");
default: (void) sprintf(retbuf, "%d", wks); return(retbuf);
case 5: return "rje";
case 7: return "echo";
case 9: return "discard";
case 11: return "systat";
case 13: return "daytime";
case 15: return "netstat";
case 17: return "qotd";
case 19: return "chargen";
case 20: return "ftp-data";
case 21: return "ftp";
case 23: return "telnet";
case 25: return "smtp";
case 37: return "time";
case 39: return "rlp";
case 42: return "name";
case 43: return "whois";
case 53: return "domain";
case 57: return "apts";
case 59: return "apfs";
case 67: return "bootps";
case 68: return "bootpc";
case 69: return "tftp";
case 77: return "rje";
case 79: return "finger";
case 87: return "link";
case 95: return "supdup";
case 100: return "newacct";
case 101: return "hostnames";
case 102: return "iso-tsap";
case 103: return "x400";
case 104: return "x400-snd";
case 105: return "csnet-ns";
case 109: return "pop-2";
case 111: return "sunrpc";
case 113: return "auth";
case 115: return "sftp";
case 117: return "uucp-path";
case 119: return "nntp";
case 121: return "erpc";
case 123: return "ntp";
case 133: return "statsrv";
case 136: return "profile";
case 144: return "NeWS";
case 161: return "snmp";
case 162: return "snmp-trap";
case 170: return "print-srv";
default: (void) sprintf(retbuf, "%d", wks); return (retbuf);
}
}
static char *
static const char *
deproto(protonum)
int protonum;
{
switch (protonum) {
case 1: return("icmp");
case 2: return("igmp");
case 3: return("ggp");
case 5: return("st");
case 6: return("tcp");
case 7: return("ucl");
case 8: return("egp");
case 9: return("igp");
case 11: return("nvp-II");
case 12: return("pup");
case 16: return("chaos");
case 17: return("udp");
default: (void) sprintf(retbuf, "%d", protonum); return(retbuf);
case 1: return "icmp";
case 2: return "igmp";
case 3: return "ggp";
case 5: return "st";
case 6: return "tcp";
case 7: return "ucl";
case 8: return "egp";
case 9: return "igp";
case 11: return "nvp-II";
case 12: return "pup";
case 16: return "chaos";
case 17: return "udp";
default: (void) sprintf(retbuf, "%d", protonum); return (retbuf);
}
}
static char *
static const u_char *
do_rrset(msg, cp, cnt, pflag, file, hs)
int cnt, pflag;
char *cp,*msg, *hs;
const u_char *cp, *msg;
const char *hs;
FILE *file;
{
int n;
int sflag;
/*
* Print answer records
* Print answer records.
*/
sflag = (_res.pfcode & pflag);
if (n = ntohs(cnt)) {
if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
if ((n = ntohs(cnt))) {
if ((!_res.pfcode) ||
((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
fprintf(file, hs);
while (--n >= 0) {
cp = p_rr(cp, msg, file);
if ((cp-msg) > PACKETSZ)
if ((cp - msg) > PACKETSZ)
return (NULL);
}
if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
if ((!_res.pfcode) ||
((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
putc('\n', file);
}
return(cp);
return (cp);
}
void
__p_query(msg)
char *msg;
const u_char *msg;
{
__fp_query(msg, stdout);
}
@ -225,15 +228,14 @@ __fp_resstat(statp, file)
struct __res_state *statp;
FILE *file;
{
int bit;
register u_long mask;
fprintf(file, ";; res options:");
if (!statp)
statp = &_res;
for (bit = 0; bit < 32; bit++) { /* XXX 32 - bad assumption! */
if (statp->options & (1<<bit))
fprintf(file, " %s", p_option(1<<bit));
}
for (mask = 1; mask != 0; mask <<= 1)
if (statp->options & mask)
fprintf(file, " %s", p_option(mask));
putc('\n', file);
}
@ -242,21 +244,26 @@ __fp_resstat(statp, file)
* This is intended to be primarily a debugging routine.
*/
void
__fp_query(msg,file)
char *msg;
__fp_nquery(msg, len, file)
const u_char *msg;
int len;
FILE *file;
{
register char *cp;
register HEADER *hp;
register const u_char *cp, *endMark;
register const HEADER *hp;
register int n;
#define TruncTest(x) if (x >= endMark) goto trunc
#define ErrorTest(x) if (x == NULL) goto error
/*
* Print header fields.
*/
hp = (HEADER *)msg;
cp = msg + sizeof(HEADER);
cp = msg + HFIXEDSZ;
endMark = cp + len;
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || hp->rcode) {
fprintf(file,";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
fprintf(file, ";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
_res_opcodes[hp->opcode],
_res_resultcodes[hp->rcode],
ntohs(hp->id));
@ -266,29 +273,28 @@ __fp_query(msg,file)
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD2)) {
fprintf(file,"; flags:");
if (hp->qr)
fprintf(file," qr");
fprintf(file, " qr");
if (hp->aa)
fprintf(file," aa");
fprintf(file, " aa");
if (hp->tc)
fprintf(file," tc");
fprintf(file, " tc");
if (hp->rd)
fprintf(file," rd");
fprintf(file, " rd");
if (hp->ra)
fprintf(file," ra");
fprintf(file, " ra");
if (hp->pr)
fprintf(file," pr");
fprintf(file, " pr");
}
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD1)) {
fprintf(file,"; Ques: %d", ntohs(hp->qdcount));
fprintf(file,", Ans: %d", ntohs(hp->ancount));
fprintf(file,", Auth: %d", ntohs(hp->nscount));
fprintf(file,", Addit: %d\n", ntohs(hp->arcount));
fprintf(file, "; Ques: %d", ntohs(hp->qdcount));
fprintf(file, ", Ans: %d", ntohs(hp->ancount));
fprintf(file, ", Auth: %d", ntohs(hp->nscount));
fprintf(file, ", Addit: %d", ntohs(hp->arcount));
}
#if 0
if (_res.pfcode & (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1)) {
if ((!_res.pfcode) || (_res.pfcode &
(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
putc('\n',file);
}
#endif
/*
* Print question records.
*/
@ -297,54 +303,71 @@ __fp_query(msg,file)
fprintf(file,";; QUESTIONS:\n");
while (--n >= 0) {
fprintf(file,";;\t");
TruncTest(cp);
cp = p_cdname(cp, msg, file);
if (cp == NULL)
return;
ErrorTest(cp);
TruncTest(cp);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ", type = %s",
__p_type(_getshort(cp)));
cp += sizeof(u_int16_t);
__p_type(_getshort((u_char*)cp)));
cp += INT16SZ;
TruncTest(cp);
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
fprintf(file, ", class = %s\n\n",
__p_class(_getshort(cp)));
cp += sizeof(u_int16_t);
fprintf(file, ", class = %s\n",
__p_class(_getshort((u_char*)cp)));
cp += INT16SZ;
putc('\n', file);
}
}
/*
* Print authoritative answer records
*/
TruncTest(cp);
cp = do_rrset(msg, cp, hp->ancount, RES_PRF_ANS, file,
";; ANSWERS:\n");
if (cp == NULL)
return;
ErrorTest(cp);
/*
* print name server records
*/
TruncTest(cp);
cp = do_rrset(msg, cp, hp->nscount, RES_PRF_AUTH, file,
";; AUTHORITY RECORDS:\n");
if (!cp)
return;
ErrorTest(cp);
TruncTest(cp);
/*
* print additional records
*/
cp = do_rrset(msg, cp, hp->arcount, RES_PRF_ADD, file,
";; ADDITIONAL RECORDS:\n");
if (!cp)
return;
ErrorTest(cp);
return;
trunc:
fprintf(file, "\n;; ...truncated\n");
return;
error:
fprintf(file, "\n;; ...malformed\n");
}
char *
p_cdname(cp, msg, file)
char *cp, *msg;
void
__fp_query(msg, file)
const u_char *msg;
FILE *file;
{
fp_nquery(msg, PACKETSZ, file);
}
const u_char *
__p_cdnname(cp, msg, len, file)
const u_char *cp, *msg;
int len;
FILE *file;
{
char name[MAXDNAME];
int n;
if ((n = dn_expand((u_char *)msg, (u_char *)msg + MAXCDNAME,
(u_char *)cp, (u_char *)name, sizeof(name))) < 0)
if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
return (NULL);
if (name[0] == '\0')
putc('.', file);
@ -353,16 +376,26 @@ p_cdname(cp, msg, file)
return (cp + n);
}
char *
p_fqname(cp, msg, file)
char *cp, *msg;
const u_char *
__p_cdname(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
return (p_cdnname(cp, msg, PACKETSZ, file));
}
/* XXX: the rest of these functions need to become length-limited, too. (vix)
*/
const u_char *
__p_fqname(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
char name[MAXDNAME];
int n, len;
if ((n = dn_expand((u_char *)msg, (u_char *)msg + MAXCDNAME,
(u_char *)cp, (u_char *)name, sizeof(name))) < 0)
if ((n = dn_expand(msg, cp + MAXCDNAME, cp, name, sizeof name)) < 0)
return (NULL);
if (name[0] == '\0') {
putc('.', file);
@ -377,27 +410,28 @@ p_fqname(cp, msg, file)
/*
* Print resource record fields in human readable form.
*/
char *
p_rr(cp, msg, file)
char *cp, *msg;
const u_char *
__p_rr(cp, msg, file)
const u_char *cp, *msg;
FILE *file;
{
int type, class, dlen, n, c;
struct in_addr inaddr;
char *cp1, *cp2;
struct iso_addr isoa;
const u_char *cp1, *cp2;
u_int32_t tmpttl, t;
int lcnt;
if ((cp = p_fqname(cp, msg, file)) == NULL)
return (NULL); /* compression error */
type = _getshort(cp);
cp += sizeof(u_int16_t);
class = _getshort(cp);
cp += sizeof(u_int16_t);
tmpttl = _getlong(cp);
cp += sizeof(u_int32_t);
dlen = _getshort(cp);
cp += sizeof(u_int16_t);
type = _getshort((u_char*)cp);
cp += INT16SZ;
class = _getshort((u_char*)cp);
cp += INT16SZ;
tmpttl = _getlong((u_char*)cp);
cp += INT32SZ;
dlen = _getshort((u_char*)cp);
cp += INT16SZ;
cp1 = cp;
if ((!_res.pfcode) || (_res.pfcode & RES_PRF_TTLID))
fprintf(file, "\t%lu", tmpttl);
@ -412,7 +446,7 @@ p_rr(cp, msg, file)
switch (class) {
case C_IN:
case C_HS:
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
bcopy(cp, (char *)&inaddr, INADDRSZ);
if (dlen == 4) {
fprintf(file,"\t%s", inet_ntoa(inaddr));
cp += dlen;
@ -422,11 +456,11 @@ p_rr(cp, msg, file)
u_short port;
address = inet_ntoa(inaddr);
cp += sizeof(inaddr);
cp += INADDRSZ;
protocol = *(u_char*)cp;
cp += sizeof(u_char);
port = _getshort(cp);
cp += sizeof(u_int16_t);
port = _getshort((u_char*)cp);
cp += INT16SZ;
fprintf(file, "\t%s\t; proto %d, port %d",
address, protocol, port);
}
@ -446,6 +480,7 @@ p_rr(cp, msg, file)
break;
case T_HINFO:
case T_ISDN:
if (n = *cp++) {
fprintf(file,"\t%.*s", n, cp);
cp += n;
@ -462,25 +497,28 @@ p_rr(cp, msg, file)
putc(' ', file);
cp = p_fqname(cp, msg, file); /* mail addr */
fputs(" (\n", file);
t = _getlong(cp); cp += sizeof(u_int32_t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file,"\t\t\t%lu\t; serial\n", t);
t = _getlong(cp); cp += sizeof(u_int32_t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file,"\t\t\t%lu\t; refresh (%s)\n", t, __p_time(t));
t = _getlong(cp); cp += sizeof(u_int32_t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file,"\t\t\t%lu\t; retry (%s)\n", t, __p_time(t));
t = _getlong(cp); cp += sizeof(u_int32_t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file,"\t\t\t%lu\t; expire (%s)\n", t, __p_time(t));
t = _getlong(cp); cp += sizeof(u_int32_t);
t = _getlong((u_char*)cp); cp += INT32SZ;
fprintf(file,"\t\t\t%lu )\t; minimum (%s)", t, __p_time(t));
break;
case T_MX:
fprintf(file,"\t%d ", _getshort(cp));
cp += sizeof(u_int16_t);
case T_AFSDB:
case T_RT:
fprintf(file,"\t%d ", _getshort((u_char*)cp));
cp += INT16SZ;
cp = p_fqname(cp, msg, file);
break;
case T_TXT:
case T_X25:
(void) fputs("\t\"", file);
cp2 = cp1 + dlen;
while (cp < cp2) {
@ -496,6 +534,15 @@ p_rr(cp, msg, file)
putc('"', file);
break;
case T_NSAP:
isoa.isoa_len = dlen;
if (isoa.isoa_len > sizeof(isoa.isoa_genaddr))
isoa.isoa_len = sizeof(isoa.isoa_genaddr);
bcopy(cp, isoa.isoa_genaddr, isoa.isoa_len);
(void) fprintf(file, "\t%s", iso_ntoa(&isoa));
cp += dlen;
break;
case T_MINFO:
case T_RP:
putc('\t', file);
@ -506,23 +553,23 @@ p_rr(cp, msg, file)
case T_UINFO:
putc('\t', file);
fputs(cp, file);
fputs((char *)cp, file);
cp += dlen;
break;
case T_UID:
case T_GID:
if (dlen == 4) {
fprintf(file,"\t%u", _getlong(cp));
cp += sizeof(int32_t);
fprintf(file,"\t%u", _getlong((u_char*)cp));
cp += INT32SZ;
}
break;
case T_WKS:
if (dlen < sizeof(u_int32_t) + 1)
if (dlen < INT32SZ + 1)
break;
bcopy(cp, (char *)&inaddr, sizeof(inaddr));
cp += sizeof(u_int32_t);
bcopy(cp, (char *)&inaddr, INADDRSZ);
cp += INT32SZ;
fprintf(file, "\t%s %s ( ",
inet_ntoa(inaddr),
deproto((int) *cp));
@ -551,7 +598,7 @@ p_rr(cp, msg, file)
case T_UNSPEC:
{
int NumBytes = 8;
char *DataPtr;
u_char *DataPtr;
int i;
if (dlen < NumBytes) NumBytes = dlen;
@ -586,92 +633,66 @@ static char nbuf[40];
/*
* Return a string for the type
*/
char *
const char *
__p_type(type)
int type;
{
switch (type) {
case T_A:
return("A");
case T_NS: /* authoritative server */
return("NS");
case T_CNAME: /* canonical name */
return("CNAME");
case T_SOA: /* start of authority zone */
return("SOA");
case T_MB: /* mailbox domain name */
return("MB");
case T_MG: /* mail group member */
return("MG");
case T_MR: /* mail rename name */
return("MR");
case T_NULL: /* null resource record */
return("NULL");
case T_WKS: /* well known service */
return("WKS");
case T_PTR: /* domain name pointer */
return("PTR");
case T_HINFO: /* host information */
return("HINFO");
case T_MINFO: /* mailbox information */
return("MINFO");
case T_MX: /* mail routing info */
return("MX");
case T_TXT: /* text */
return("TXT");
case T_RP: /* responsible person */
return("RP");
case T_AXFR: /* zone transfer */
return("AXFR");
case T_MAILB: /* mail box */
return("MAILB");
case T_MAILA: /* mail address */
return("MAILA");
case T_ANY: /* matches any type */
return("ANY");
case T_UINFO:
return("UINFO");
case T_UID:
return("UID");
case T_GID:
return("GID");
case T_A: return "A";
case T_NS: return "NS";
case T_CNAME: return "CNAME";
case T_SOA: return "SOA";
case T_MB: return "MB";
case T_MG: return "MG";
case T_MR: return "MR";
case T_NULL: return "NULL";
case T_WKS: return "WKS";
case T_PTR: return "PTR";
case T_HINFO: return "HINFO";
case T_MINFO: return "MINFO";
case T_MX: return "MX";
case T_TXT: return "TXT";
case T_NSAP: return "NSAP";
case T_RP: return "RP";
case T_AFSDB: return "AFSDB";
case T_X25: return "X25";
case T_ISDN: return "ISDN";
case T_RT: return "RT";
case T_AXFR: return "AXFR";
case T_MAILB: return "MAILB";
case T_MAILA: return "MAILA";
case T_ANY: return "ANY";
case T_UINFO: return "UINFO";
case T_UID: return "UID";
case T_GID: return "GID";
#ifdef ALLOW_T_UNSPEC
case T_UNSPEC:
return("UNSPEC");
case T_UNSPEC: return "UNSPEC";
#endif /* ALLOW_T_UNSPEC */
default:
(void)sprintf(nbuf, "%d", type);
return(nbuf);
default: (void)sprintf(nbuf, "%d", type); return (nbuf);
}
}
/*
* Return a mnemonic for class
*/
char *
const char *
__p_class(class)
int class;
{
switch (class) {
case C_IN: /* internet class */
return("IN");
case C_HS: /* hesiod class */
return("HS");
case C_ANY: /* matches any class */
return("ANY");
default:
(void)sprintf(nbuf, "%d", class);
return(nbuf);
case C_IN: return("IN");
case C_HS: return("HS");
case C_ANY: return("ANY");
default: (void)sprintf(nbuf, "%d", class); return (nbuf);
}
}
/*
* Return a mnemonic for an option
*/
static char *
p_option(option)
u_int32_t option;
const char *
__p_option(option)
u_long option;
{
switch (option) {
case RES_INIT: return "init";
@ -684,6 +705,8 @@ p_option(option)
case RES_DEFNAMES: return "defnam";
case RES_STAYOPEN: return "styopn";
case RES_DNSRCH: return "dnsrch";
case RES_INSECURE1: return "insecure1";
case RES_INSECURE2: return "insecure2";
default: sprintf(nbuf, "?0x%x?", option); return nbuf;
}
}
@ -700,7 +723,7 @@ __p_time(value)
if (value == 0) {
strcpy(nbuf, "0 secs");
return(nbuf);
return (nbuf);
}
secs = value % 60;
@ -735,5 +758,5 @@ __p_time(value)
*p++ = ' ';
(void)sprintf(p, "%d sec%s", PLURALIZE(secs));
}
return(nbuf);
return (nbuf);
}

256
lib/libc/net/res_init.c
View File

@ -53,7 +53,7 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
static char rcsid[] = "$Id: res_init.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $";
static char rcsid[] = "$Id: res_init.c,v 4.9.1.12 1994/06/11 22:05:04 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
@ -61,30 +61,44 @@ static char rcsid[] = "$Id: res_init.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <ctype.h>
#include <resolv.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void res_setoptions __P((char *, char *));
#ifdef RESOLVSORT
static u_int32_t net_mask __P((struct in_addr));
#endif
/*
* Resolver state default settings
* Resolver state default settings.
*/
struct __res_state _res = {
RES_TIMEOUT, /* retransmition time interval */
4, /* number of times to retransmit */
RES_DEFAULT, /* options flags */
1, /* number of name servers */
};
struct __res_state _res;
/*
* Set up default settings. If the configuration file exist, the values
* there will have precedence. Otherwise, the server address is set to
* INADDR_ANY and the default domain name comes from the gethostname().
*
* The configuration file should only be used if you want to redefine your
* domain or run without a server on your machine.
* An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
* rather than INADDR_ANY ("0.0.0.0") as the default name server address
* since it was noted that INADDR_ANY actually meant ``the first interface
* you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
* it had to be "up" in order for you to reach your own name server. It
* was later decided that since the recommended practice is to always
* install local static routes through 127.0.0.1 for all your network
* interfaces, that we could solve this problem without a code change.
*
* The configuration file should always be used, since it is the only way
* to specify a default domain. If you are running a server on your local
* machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
* in the configuration file.
*
* Return 0 if completes successfully, -1 on error
*/
@ -92,11 +106,35 @@ res_init()
{
register FILE *fp;
register char *cp, **pp;
register int n;
register int n, dots;
char buf[BUFSIZ];
int nserv = 0; /* number of nameserver records read from file */
int haveenv = 0;
int havesearch = 0;
#ifdef RESOLVSORT
int nsort = 0;
char *net;
#endif
/*
* These four fields used to be statically initialized. This made
* it hard to use this code in a shared library. It is necessary,
* now that we're doing dynamic initialization here, that we preserve
* the old semantics: if an application modifies one of these three
* fields of _res before res_init() is called, res_init() will not
* alter them. Of course, if an application is setting them to
* _zero_ before calling res_init(), hoping to override what used
* to be the static default, we can't detect it and unexpected results
* will follow. Zero for any of these fields would make no sense,
* so one can safely assume that the applications were already getting
* unexpected results.
*/
if (!_res.retrans)
_res.retrans = RES_TIMEOUT;
if (!_res.retry)
_res.retry = 4;
if (!_res.options)
_res.options = RES_DEFAULT;
#ifdef USELOOPBACK
_res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
@ -106,14 +144,41 @@ res_init()
_res.nsaddr.sin_family = AF_INET;
_res.nsaddr.sin_port = htons(NAMESERVER_PORT);
_res.nscount = 1;
_res.ndots = 1;
_res.pfcode = 0;
/* Allow user to override the local domain definition */
if ((cp = getenv("LOCALDOMAIN")) != NULL) {
(void)strncpy(_res.defdname, cp, sizeof(_res.defdname));
if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
*cp = '\0';
(void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
haveenv++;
/*
* Set search list to be blank-separated strings
* from rest of env value. Permits users of LOCALDOMAIN
* to still have a search list, and anyone to set the
* one that they want to use as an individual (even more
* important now that the rfc1535 stuff restricts searches)
*/
cp = _res.defdname;
pp = _res.dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
if (*cp == '\n') /* silly backwards compat */
break;
else if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
} else if (n) {
*pp++ = cp;
n = 0;
havesearch = 1;
}
}
/* null terminate last domain if there are excess */
while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
cp++;
*cp = '\0';
*pp++ = 0;
}
if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
@ -158,7 +223,9 @@ res_init()
cp = _res.defdname;
pp = _res.dnsrch;
*pp++ = cp;
for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
for (n = 0;
*cp && pp < _res.dnsrch + MAXDNSRCH;
cp++) {
if (*cp == ' ' || *cp == '\t') {
*cp = 0;
n = 1;
@ -192,32 +259,167 @@ res_init()
}
continue;
}
#ifdef RESOLVSORT
if (!strncmp(buf, "sortlist", sizeof("sortlist") -1)) {
struct in_addr a;
cp = buf + sizeof("sortlist") - 1;
while (nsort < MAXRESOLVSORT) {
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp == '\0' || *cp == '\n' || *cp == ';')
break;
net = cp;
while (*cp && *cp != '/' &&
isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (inet_aton(net, &a)) {
_res.sort_list[nsort].addr = a;
if (n == '/') {
*cp++ = n;
net = cp;
while (*cp && isascii(*cp) && !isspace(*cp))
cp++;
n = *cp;
*cp = 0;
if (inet_aton(net, &a)) {
_res.sort_list[nsort].mask = a.s_addr;
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
}
} else {
_res.sort_list[nsort].mask =
net_mask(_res.sort_list[nsort].addr);
}
nsort++;
}
*cp++ = n;
}
continue;
}
#endif
if (!strncmp(buf, "options", sizeof("options") -1)) {
res_setoptions(buf + sizeof("options") - 1, "conf");
continue;
}
}
if (nserv > 1)
_res.nscount = nserv;
#ifdef RESOLVSORT
_res.nsort = nsort;
#endif
(void) fclose(fp);
}
} /*if(fopen)*/
if (_res.defdname[0] == 0) {
if (gethostname(buf, sizeof(_res.defdname)) == 0 &&
(cp = strchr(buf, '.')))
if (gethostname(buf, sizeof(_res.defdname) - 1) == 0 &&
(cp = strchr(buf, '.'))) {
(void)strcpy(_res.defdname, cp + 1);
}
}
/* find components of local domain that might be searched */
if (havesearch == 0) {
pp = _res.dnsrch;
*pp++ = _res.defdname;
for (cp = _res.defdname, n = 0; *cp; cp++)
if (*cp == '.')
n++;
*pp = NULL;
#ifndef RFC1535
dots = 0;
for (cp = _res.defdname; *cp; cp++)
dots += (*cp == '.');
cp = _res.defdname;
for (; n >= LOCALDOMAINPARTS && pp < _res.dnsrch + MAXDFLSRCH;
n--) {
cp = strchr(cp, '.');
*pp++ = ++cp;
while (pp < _res.dnsrch + MAXDFLSRCH) {
if (dots < LOCALDOMAINPARTS) {
break;
}
cp = strchr(cp, '.') + 1; /* we know there is one */
*pp++ = cp;
dots--;
}
*pp++ = 0;
*pp = NULL;
#ifdef DEBUG
if (_res.options & RES_DEBUG) {
printf(";; res_init()... default dnsrch list:\n");
for (pp = _res.dnsrch; *pp; pp++) {
printf(";;\t%s\n", *pp);
}
printf(";;\t..END..\n");
}
#endif /*DEBUG*/
#endif /*!RFC1535*/
}
if ((cp = getenv("RES_OPTIONS")) != NULL) {
res_setoptions(cp, "env");
}
_res.options |= RES_INIT;
return (0);
}
static void
res_setoptions(options, source)
char *options, *source;
{
char *cp = options;
int i;
#ifdef DEBUG
if (_res.options & RES_DEBUG) {
printf(";; res_setoptions(\"%s\", \"%s\")...\n",
options, source);
}
#endif
while (*cp) {
/* skip leading and inner runs of spaces */
while (*cp == ' ' || *cp == '\t')
cp++;
/* search for and process individual options */
if (!strncmp(cp, "ndots:", sizeof("ndots:")-1)) {
i = atoi(cp + sizeof("ndots:") - 1);
if (i <= RES_MAXNDOTS)
_res.ndots = i;
else
_res.ndots = RES_MAXNDOTS;
#ifdef DEBUG
if (_res.options & RES_DEBUG) {
printf(";;\tndots=%d\n", _res.ndots);
}
#endif
} else if (!strncmp(cp, "debug", sizeof("debug")-1)) {
#ifdef DEBUG
if (!(_res.options & RES_DEBUG)) {
printf(";; res_setoptions(\"%s\", \"%s\")..\n",
options, source);
_res.options |= RES_DEBUG;
}
printf(";;\tdebug\n");
#endif
} else {
/* XXX - print a warning here? */
}
/* skip to next run of spaces */
while (*cp && *cp != ' ' && *cp != '\t')
cp++;
}
}
#ifdef RESOLVSORT
static u_int32_t
net_mask(in) /* XXX - should really use system's version of this */
struct in_addr in;
{
register u_int32_t i = ntohl(in.s_addr);
if (IN_CLASSA(i))
return (htonl(IN_CLASSA_NET));
else if (IN_CLASSB(i))
return (htonl(IN_CLASSB_NET));
else
return (htonl(IN_CLASSC_NET));
}
#endif

91
lib/libc/net/res_mkquery.c
View File

@ -53,35 +53,37 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_mkquery.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: res_mkquery.c,v 4.9.1.2 1993/05/17 10:00:01 vixie Exp $";
static char rcsid[] = "$Id: res_mkquery.c,v 4.9.1.7 1994/06/01 21:09:58 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
#include <stdio.h>
#include <resolv.h>
#include <string.h>
/*
* Form all types of queries.
* Returns the size of the result or -1.
*/
int
res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
int op; /* opcode of query */
const char *dname; /* domain name */
const char *dname; /* domain name */
int class, type; /* class and type of query */
const char *data; /* resource record data */
const u_char *data; /* resource record data */
int datalen; /* length of data */
const char *newrr_in; /* new rr for modify or append */
char *buf; /* buffer to put query */
const u_char *newrr_in; /* new rr for modify or append */
u_char *buf; /* buffer to put query */
int buflen; /* size of buffer */
{
register HEADER *hp;
register char *cp;
register u_char *cp;
register int n;
struct rrec *newrr = (struct rrec *) newrr_in;
char *dnptrs[10], **dpp, **lastdnptr;
u_char *dnptrs[20], **dpp, **lastdnptr;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
@ -91,21 +93,21 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
/*
* Initialize header fields.
*/
if ((buf == NULL) || (buflen < sizeof(HEADER)))
if ((buf == NULL) || (buflen < HFIXEDSZ))
return(-1);
bzero(buf, sizeof(HEADER));
bzero(buf, HFIXEDSZ);
hp = (HEADER *) buf;
hp->id = htons(++_res.id);
hp->opcode = op;
hp->pr = (_res.options & RES_PRIMARY) != 0;
hp->rd = (_res.options & RES_RECURSE) != 0;
hp->rcode = NOERROR;
cp = buf + sizeof(HEADER);
buflen -= sizeof(HEADER);
cp = buf + HFIXEDSZ;
buflen -= HFIXEDSZ;
dpp = dnptrs;
*dpp++ = buf;
*dpp++ = NULL;
lastdnptr = dnptrs + sizeof(dnptrs)/sizeof(dnptrs[0]);
lastdnptr = dnptrs + sizeof dnptrs / sizeof dnptrs[0];
/*
* perform opcode specific processing
*/
@ -113,15 +115,14 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
case QUERY:
if ((buflen -= QFIXEDSZ) < 0)
return(-1);
if ((n = dn_comp((u_char *)dname, (u_char *)cp, buflen,
(u_char **)dnptrs, (u_char **)lastdnptr)) < 0)
if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
return (-1);
cp += n;
buflen -= n;
__putshort(type, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(class, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(type, cp);
cp += INT16SZ;
__putshort(class, cp);
cp += INT16SZ;
hp->qdcount = htons(1);
if (op == QUERY || data == NULL)
break;
@ -129,19 +130,19 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
* Make an additional record for completion domain.
*/
buflen -= RRFIXEDSZ;
if ((n = dn_comp((u_char *)data, (u_char *)cp, buflen,
(u_char **)dnptrs, (u_char **)lastdnptr)) < 0)
n = dn_comp((char *)data, cp, buflen, dnptrs, lastdnptr);
if (n < 0)
return (-1);
cp += n;
buflen -= n;
__putshort(T_NULL, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(class, (u_char *)cp);
cp += sizeof(u_int16_t);
__putlong(0, (u_char *)cp);
cp += sizeof(u_int32_t);
__putshort(0, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(T_NULL, cp);
cp += INT16SZ;
__putshort(class, cp);
cp += INT16SZ;
__putlong(0, cp);
cp += INT32SZ;
__putshort(0, cp);
cp += INT16SZ;
hp->arcount = htons(1);
break;
@ -152,14 +153,14 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
if (buflen < 1 + RRFIXEDSZ + datalen)
return (-1);
*cp++ = '\0'; /* no domain name */
__putshort(type, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(class, (u_char *)cp);
cp += sizeof(u_int16_t);
__putlong(0, (u_char *)cp);
cp += sizeof(u_int32_t);
__putshort(datalen, (u_char *)cp);
cp += sizeof(u_int16_t);
__putshort(type, cp);
cp += INT16SZ;
__putshort(class, cp);
cp += INT16SZ;
__putlong(0, cp);
cp += INT32SZ;
__putshort(datalen, cp);
cp += INT16SZ;
if (datalen) {
bcopy(data, cp, datalen);
cp += datalen;
@ -187,13 +188,13 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
return (-1);
cp += n;
__putshort(type, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
__putshort(class, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
__putlong(0, cp);
cp += sizeof(u_int32_t);
cp += INT32SZ;
__putshort(datalen, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
if (datalen) {
bcopy(data, cp, datalen);
cp += datalen;
@ -210,13 +211,13 @@ res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
return (-1);
cp += n;
__putshort(newrr->r_type, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
__putshort(newrr->r_class, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
__putlong(0, cp);
cp += sizeof(u_int32_t);
cp += INT32SZ;
__putshort(newrr->r_size, cp);
cp += sizeof(u_int16_t);
cp += INT16SZ;
if (newrr->r_size) {
bcopy(newrr->r_data, cp, newrr->r_size);
cp += newrr->r_size;

231
lib/libc/net/res_query.c
View File

@ -53,20 +53,29 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_query.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: res_query.c,v 1.1 1993/06/01 09:42:14 vixie Exp vixie $";
static char rcsid[] = "$Id: res_query.c,v 4.9.1.13 1994/06/11 22:05:04 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/param.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <stdio.h>
#include <netdb.h>
#include <resolv.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#if defined(BSD) && (BSD >= 199306)
# include <stdlib.h>
# include <string.h>
#else
# include "../conf/portability.h"
#endif
#if defined(USE_OPTIONS_H)
# include <../conf/options.h>
#endif
#if PACKETSZ > 1024
#define MAXPACKET PACKETSZ
@ -74,6 +83,7 @@ static char rcsid[] = "$Id: res_query.c,v 1.1 1993/06/01 09:42:14 vixie Exp vixi
#define MAXPACKET 1024
#endif
char *__hostalias __P((const char *));
int h_errno;
/*
@ -83,27 +93,31 @@ int h_errno;
* if no error is indicated and the answer count is nonzero.
* Return the size of the response on success, -1 on error.
* Error number is left in h_errno.
*
* Caller must parse answer and determine whether it answers the question.
*/
int
res_query(name, class, type, answer, anslen)
char *name; /* domain name */
const char *name; /* domain name */
int class, type; /* class and type of query */
u_char *answer; /* buffer to put answer */
int anslen; /* size of answer buffer */
{
char buf[MAXPACKET];
HEADER *hp;
u_char buf[MAXPACKET];
register HEADER *hp = (HEADER *) answer;
int n;
hp->rcode = NOERROR; /* default */
if ((_res.options & RES_INIT) == 0 && res_init() == -1)
return (-1);
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; res_query(%s, %d, %d)\n", name, class, type);
#endif
n = res_mkquery(QUERY, name, class, type, (char *)NULL, 0, NULL,
buf, sizeof(buf));
n = res_mkquery(QUERY, name, class, type, NULL, 0, NULL,
buf, sizeof(buf));
if (n <= 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
@ -112,17 +126,16 @@ res_query(name, class, type, answer, anslen)
h_errno = NO_RECOVERY;
return (n);
}
n = res_send(buf, n, (char *)answer, anslen);
n = res_send(buf, n, answer, anslen);
if (n < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; res_query: send error\n");
#endif
h_errno = TRY_AGAIN;
return(n);
return (n);
}
hp = (HEADER *) answer;
if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
@ -148,86 +161,148 @@ res_query(name, class, type, answer, anslen)
}
return (-1);
}
return(n);
return (n);
}
/*
* Formulate a normal query, send, and retrieve answer in supplied buffer.
* Return the size of the response on success, -1 on error.
* If enabled, implement search rules until answer or unrecoverable failure
* is detected. Error number is left in h_errno.
* Only useful for queries in the same name hierarchy as the local host
* (not, for example, for host address-to-name lookups in domain in-addr.arpa).
* is detected. Error code, if any, is left in h_errno.
*/
int
res_search(name, class, type, answer, anslen)
char *name; /* domain name */
const char *name; /* domain name */
int class, type; /* class and type of query */
u_char *answer; /* buffer to put answer */
int anslen; /* size of answer */
{
register char *cp, **domain;
int n, ret, got_nodata = 0;
char *__hostalias();
register const char *cp, * const *domain;
HEADER *hp = (HEADER *) answer;
u_int dots;
int trailing_dot, ret, saved_herrno;
int got_nodata = 0, got_servfail = 0, tried_as_is = 0;
if ((_res.options & RES_INIT) == 0 && res_init() == -1)
return (-1);
errno = 0;
h_errno = HOST_NOT_FOUND; /* default, if we never query */
for (cp = name, n = 0; *cp; cp++)
if (*cp == '.')
n++;
if (n == 0 && (cp = __hostalias(name)))
dots = 0;
for (cp = name; *cp; cp++)
dots += (*cp == '.');
trailing_dot = 0;
if ((cp > name) && (*--cp == '.'))
trailing_dot++;
/*
* if there aren't any dots, it could be a user-level alias
*/
if ((!dots) && (cp = __hostalias(name)))
return (res_query(cp, class, type, answer, anslen));
/*
* If there are dots in the name already, let's just give it a try
* 'as is'. The threshold can be set with the "ndots" option.
*/
saved_herrno = -1;
if (dots >= _res.ndots) {
ret = res_querydomain(name, NULL, class, type, answer, anslen);
if (ret > 0)
return (ret);
saved_herrno = h_errno;
tried_as_is++;
}
/*
* We do at least one level of search if
* - there is no dot and RES_DEFNAME is set, or
* - there is at least one dot, there is no trailing dot,
* and RES_DNSRCH is set.
*/
if ((n == 0 && _res.options & RES_DEFNAMES) ||
(n != 0 && *--cp != '.' && _res.options & RES_DNSRCH))
for (domain = _res.dnsrch; *domain; domain++) {
ret = res_querydomain(name, *domain, class, type,
answer, anslen);
if (((!dots) && _res.options & RES_DEFNAMES) ||
(dots && (!trailing_dot) && _res.options & RES_DNSRCH)
) {
int done = 0;
for (domain = (const char * const *)_res.dnsrch;
*domain && !done;
domain++) {
ret = res_querydomain(name, *domain, class, type,
answer, anslen);
if (ret > 0)
return (ret);
/*
* If no server present, give up.
* If name isn't found in this domain,
* keep trying higher domains in the search list
* (if that's enabled).
* On a NO_DATA error, keep trying, otherwise
* a wildcard entry of another type could keep us
* from finding this entry higher in the domain.
* If we get some other error (negative answer or
* server failure), then stop searching up,
* but try the input name below in case it's
* fully-qualified.
*/
if (errno == ECONNREFUSED) {
h_errno = TRY_AGAIN;
return (-1);
}
switch (h_errno) {
case NO_DATA:
got_nodata++;
/* FALLTHROUGH */
case HOST_NOT_FOUND:
/* keep trying */
break;
case TRY_AGAIN:
if (hp->rcode == SERVFAIL) {
/* try next search element, if any */
got_servfail++;
break;
}
/* FALLTHROUGH */
default:
/* anything else implies that we're done */
done++;
}
/* if we got here for some reason other than DNSRCH,
* we only wanted one iteration of the loop, so stop.
*/
if (!(_res.options & RES_DNSRCH))
done++;
}
}
/* if we have not already tried the name "as is", do that now.
* note that we do this regardless of how many dots were in the
* name or whether it ends with a dot.
*/
if (!tried_as_is) {
ret = res_querydomain(name, NULL, class, type, answer, anslen);
if (ret > 0)
return (ret);
/*
* If no server present, give up.
* If name isn't found in this domain,
* keep trying higher domains in the search list
* (if that's enabled).
* On a NO_DATA error, keep trying, otherwise
* a wildcard entry of another type could keep us
* from finding this entry higher in the domain.
* If we get some other error (negative answer or
* server failure), then stop searching up,
* but try the input name below in case it's fully-qualified.
*/
if (errno == ECONNREFUSED) {
h_errno = TRY_AGAIN;
return (-1);
}
if (h_errno == NO_DATA)
got_nodata++;
if ((h_errno != HOST_NOT_FOUND && h_errno != NO_DATA) ||
(_res.options & RES_DNSRCH) == 0)
break;
saved_herrno = h_errno;
}
/*
* If the search/default failed, try the name as fully-qualified,
* but only if it contained at least one dot (even trailing).
* This is purely a heuristic; we assume that any reasonable query
* about a top-level domain (for servers, SOA, etc) will not use
* res_search.
/* if we got here, we didn't satisfy the search.
* if we did an initial full query, return that query's h_errno
* (note that we wouldn't be here if that query had succeeded).
* else if we ever got a nodata, send that back as the reason.
* else send back meaningless h_errno, that being the one from
* the last DNSRCH we did.
*/
if (n && (ret = res_querydomain(name, (char *)NULL, class, type,
answer, anslen)) > 0)
return (ret);
if (got_nodata)
if (saved_herrno != -1)
h_errno = saved_herrno;
else if (got_nodata)
h_errno = NO_DATA;
else if (got_servfail)
h_errno = TRY_AGAIN;
return (-1);
}
@ -235,20 +310,21 @@ res_search(name, class, type, answer, anslen)
* Perform a call on res_query on the concatenation of name and domain,
* removing a trailing dot from name if domain is NULL.
*/
int
res_querydomain(name, domain, class, type, answer, anslen)
char *name, *domain;
const char *name, *domain;
int class, type; /* class and type of query */
u_char *answer; /* buffer to put answer */
int anslen; /* size of answer */
{
char nbuf[2*MAXDNAME+2];
char *longname = nbuf;
const char *longname = nbuf;
int n;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; res_querydomain(%s, %s, %d, %d)\n",
name, domain, class, type);
name, domain?domain:"<Nil>", class, type);
#endif
if (domain == NULL) {
/*
@ -256,14 +332,15 @@ res_querydomain(name, domain, class, type, answer, anslen)
* copy without '.' if present.
*/
n = strlen(name) - 1;
if (name[n] == '.' && n < sizeof(nbuf) - 1) {
if (n != (0 - 1) && name[n] == '.' && n < sizeof(nbuf) - 1) {
bcopy(name, nbuf, n);
nbuf[n] = '\0';
} else
longname = name;
} else
(void)sprintf(nbuf, "%.*s.%.*s",
MAXDNAME, name, MAXDNAME, domain);
} else {
sprintf(nbuf, "%.*s.%.*s",
MAXDNAME, name, MAXDNAME, domain);
}
return (res_query(longname, class, type, answer, anslen));
}
@ -272,9 +349,9 @@ char *
__hostalias(name)
register const char *name;
{
register char *C1, *C2;
register char *cp1, *cp2;
FILE *fp;
char *file, *getenv(), *strcpy(), *strncpy();
char *file;
char buf[BUFSIZ];
static char abuf[MAXDNAME];
@ -283,17 +360,17 @@ __hostalias(name)
return (NULL);
buf[sizeof(buf) - 1] = '\0';
while (fgets(buf, sizeof(buf), fp)) {
for (C1 = buf; *C1 && !isspace(*C1); ++C1);
if (!*C1)
for (cp1 = buf; *cp1 && !isspace(*cp1); ++cp1);
if (!*cp1)
break;
*C1 = '\0';
*cp1 = '\0';
if (!strcasecmp(buf, name)) {
while (isspace(*++C1));
if (!*C1)
while (isspace(*++cp1));
if (!*cp1)
break;
for (C2 = C1 + 1; *C2 && !isspace(*C2); ++C2);
abuf[sizeof(abuf) - 1] = *C2 = '\0';
(void)strncpy(abuf, C1, sizeof(abuf) - 1);
for (cp2 = cp1 + 1; *cp2 && !isspace(*cp2); ++cp2);
abuf[sizeof(abuf) - 1] = *cp2 = '\0';
(void)strncpy(abuf, cp1, sizeof(abuf) - 1);
fclose(fp);
return (abuf);
}

678
lib/libc/net/res_send.c
View File

@ -53,9 +53,16 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)res_send.c 8.1 (Berkeley) 6/4/93";
static char rcsid[] = "$Id: res_send.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $";
static char rcsid[] = "$Id: res_send.c,v 4.9.1.12 1994/06/26 04:00:18 vixie Exp $";
#endif /* LIBC_SCCS and not lint */
/* change this to "0"
* if you talk to a lot
* of multi-homed SunOS
* ("broken") name servers.
*/
#define CHECK_SRVR_ADDR 1 /* XXX - should be in options.h */
/*
* Send query to name server and wait for reply.
*/
@ -67,139 +74,323 @@ static char rcsid[] = "$Id: res_send.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel $
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
#include <resolv.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
void _res_close __P((void));
static int s = -1; /* socket used for communications */
static struct sockaddr no_addr;
static int connected = 0; /* is the socket connected */
static int vc = 0; /* is the socket a virtual ciruit? */
#ifndef FD_SET
#define NFDBITS 32
#define FD_SETSIZE 32
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
#endif
#ifndef DEBUG
# define Dprint(cond, args) /*empty*/
# define DprintQ(cond, args, query) /*empty*/
# define Aerror(file, string, error, address) /*empty*/
# define Perror(file, string, error) /*empty*/
#else
# define Dprint(cond, args) if (cond) {fprintf args;} else {}
# define DprintQ(cond, args, query) if (cond) {\
fprintf args;\
__p_query(query);\
} else {}
static void
Aerror(file, string, error, address)
FILE *file;
char *string;
int error;
struct sockaddr_in address;
{
int save = errno;
res_send(buf, buflen, answer, anslen)
const char *buf;
int buflen;
char *answer;
int anslen;
{
register int n;
int try, v_circuit, resplen, ns;
int gotsomewhere = 0, connected = 0;
int connreset = 0;
u_short id, len;
char *cp;
fd_set dsmask;
struct timeval timeout;
HEADER *hp = (HEADER *) buf;
HEADER *anhp = (HEADER *) answer;
u_int badns; /* XXX NSMAX can't exceed #/bits per this */
struct iovec iov[2];
int terrno = ETIMEDOUT;
char junk[512];
#ifdef DEBUG
if ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_QUERY)) {
printf(";; res_send()\n");
__p_query(buf);
if (_res.options & RES_DEBUG) {
fprintf(file, "res_send: %s ([%s].%d): %s\n",
string,
inet_ntoa(address.sin_addr),
address.sin_port,
strerror(error));
}
errno = save;
}
static void
Perror(file, string, error)
FILE *file;
char *string;
int error;
{
int save = errno;
if (_res.options & RES_DEBUG) {
fprintf(file, "res_send: %s: %s\n",
string, strerror(error));
}
errno = save;
}
#endif
if (!(_res.options & RES_INIT))
if (res_init() == -1) {
return(-1);
static res_send_qhook Qhook = NULL;
static res_send_rhook Rhook = NULL;
void
res_send_setqhook(hook)
res_send_qhook hook;
{
Qhook = hook;
}
void
res_send_setrhook(hook)
res_send_rhook hook;
{
Rhook = hook;
}
/* int
* our_server(ina)
* looks up "ina" in _res.ns_addr_list[]
* returns:
* 0 : not found
* >0 : found
* author:
* paul vixie, 29may94
*/
static int
our_server(inp)
const struct sockaddr_in *inp;
{
struct sockaddr_in ina;
register int ns, ret;
ina = *inp;
ret = 0;
for (ns = 0; ns < _res.nscount; ns++) {
register const struct sockaddr_in *srv = &_res.nsaddr_list[ns];
if (srv->sin_family == ina.sin_family &&
srv->sin_port == ina.sin_port &&
(srv->sin_addr.s_addr == INADDR_ANY ||
srv->sin_addr.s_addr == ina.sin_addr.s_addr)) {
ret++;
break;
}
}
return (ret);
}
/* int
* name_in_query(name, type, class, buf, eom)
* look for (name,type,class) in the query section of packet (buf,eom)
* returns:
* -1 : format error
* 0 : not found
* >0 : found
*/
static int
name_in_query(name, type, class, buf, eom)
const char *name;
register int type, class;
const u_char *buf, *eom;
{
register const u_char *cp = buf + HFIXEDSZ;
int qdcount = ntohs(((HEADER*)buf)->qdcount);
while (qdcount-- > 0) {
char tname[MAXDNAME+1];
register int n, ttype, tclass;
n = dn_expand(buf, eom, cp, tname, sizeof tname);
if (n < 0)
return (-1);
cp += n;
ttype = _getshort(cp); cp += INT16SZ;
tclass = _getshort(cp); cp += INT16SZ;
if (ttype == type &&
tclass == class &&
strcasecmp(tname, name) == 0)
return (1);
}
return (0);
}
/* int
* queries_match(buf1, eom1, buf2, eom2)
* is there a 1:1 mapping of (name,type,class)
* in (buf1,eom1) and (buf2,eom2)?
* returns:
* -1 : format error
* 0 : not a 1:1 mapping
* >0 : is a 1:1 mapping
*/
static int
queries_match(buf1, eom1, buf2, eom2)
const u_char *buf1, *eom1;
const u_char *buf2, *eom2;
{
register const u_char *cp = buf1 + HFIXEDSZ;
int qdcount = ntohs(((HEADER*)buf1)->qdcount);
if (qdcount != ntohs(((HEADER*)buf2)->qdcount))
return (0);
while (qdcount-- > 0) {
char tname[MAXDNAME+1];
register int n, ttype, tclass;
n = dn_expand(buf1, eom1, cp, tname, sizeof tname);
if (n < 0)
return (-1);
cp += n;
ttype = _getshort(cp); cp += INT16SZ;
tclass = _getshort(cp); cp += INT16SZ;
if (!name_in_query(tname, ttype, tclass, buf2, eom2))
return (0);
}
return (1);
}
int
res_send(buf, buflen, ans, anssiz)
const u_char *buf;
int buflen;
u_char *ans;
int anssiz;
{
HEADER *hp = (HEADER *) buf;
HEADER *anhp = (HEADER *) ans;
int gotsomewhere = 0,
connreset = 0,
terrno = ETIMEDOUT;
register int n;
int try, v_circuit, resplen, ns;
u_int badns; /* XXX NSMAX can't exceed #/bits in this var */
DprintQ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_QUERY),
(stdout, ";; res_send()\n"), buf);
if (!(_res.options & RES_INIT)) {
if (res_init() == -1)
return (-1);
}
v_circuit = (_res.options & RES_USEVC) || buflen > PACKETSZ;
id = hp->id;
badns = 0;
/*
* Send request, RETRY times, or until successful
*/
for (try = 0; try < _res.retry; try++) {
for (ns = 0; ns < _res.nscount; ns++) {
if (badns & (1<<ns))
continue;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; Querying server (# %d) address = %s\n",
ns+1,
inet_ntoa(_res.nsaddr_list[ns].sin_addr));
#endif
usevc:
struct sockaddr_in *nsap = &_res.nsaddr_list[ns];
same_ns:
if (badns & (1<<ns)) {
_res_close();
goto next_ns;
}
if (Qhook) {
int done = 0, loops = 0;
do {
res_sendhookact act;
act = (*Qhook)(&nsap,
&buf,
&buflen,
ans,
anssiz,
&resplen);
switch (act) {
case res_goahead:
done = 1;
break;
case res_nextns:
_res_close();
goto next_ns;
case res_done:
return (resplen);
case res_modified:
/* give the hook another try */
if (++loops < 42) /*doug adams*/
break;
/*FALLTHROUGH*/
case res_error:
/*FALLTHROUGH*/
default:
return (-1);
}
} while (!done);
}
Dprint(_res.options & RES_DEBUG,
(stdout, ";; Querying server (# %d) address = %s\n",
ns+1, inet_ntoa(nsap->sin_addr)));
if (v_circuit) {
int truncated = 0;
int truncated;
struct iovec iov[2];
u_short len;
u_char *cp;
/*
* Use virtual circuit;
* at most one attempt per server.
*/
try = _res.retry;
if (s < 0) {
s = socket(AF_INET, SOCK_STREAM, 0);
truncated = 0;
if ((s < 0) || (!vc)) {
if (s >= 0)
_res_close();
s = socket(AF_INET, SOCK_STREAM, PF_UNSPEC);
if (s < 0) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("socket (vc) failed");
#endif
continue;
Perror(stderr, "socket(vc)", errno);
return (-1);
}
if (connect(s,
(struct sockaddr *)&(_res.nsaddr_list[ns]),
sizeof(struct sockaddr)) < 0) {
(struct sockaddr *)nsap,
sizeof(struct sockaddr))
< 0) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("connect failed");
#endif
(void) close(s);
s = -1;
continue;
Aerror(stderr, "connect/vc",
errno, *nsap);
badns |= (1<<ns);
_res_close();
goto next_ns;
}
vc = 1;
}
/*
* Send length & message
*/
len = htons((u_short)buflen);
putshort((u_short)buflen, (u_char*)&len);
iov[0].iov_base = (caddr_t)&len;
iov[0].iov_len = sizeof(len);
iov[1].iov_base = (char *)buf;
iov[0].iov_len = INT16SZ;
iov[1].iov_base = (caddr_t)buf;
iov[1].iov_len = buflen;
if (writev(s, iov, 2) != sizeof(len) + buflen) {
if (writev(s, iov, 2) != (INT16SZ + buflen)) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("write failed");
#endif
(void) close(s);
s = -1;
continue;
Perror(stderr, "write failed", errno);
badns |= (1<<ns);
_res_close();
goto next_ns;
}
/*
* Receive length & response
*/
cp = answer;
len = sizeof(short);
while (len != 0 &&
(n = read(s, (char *)cp, (int)len)) > 0) {
cp = ans;
len = INT16SZ;
while ((n = read(s, (char *)cp, (int)len)) > 0) {
cp += n;
len -= n;
if ((len -= n) <= 0)
break;
}
if (n <= 0) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("read failed");
#endif
(void) close(s);
s = -1;
Perror(stderr, "read failed", errno);
_res_close();
/*
* A long running process might get its TCP
* connection reset if the remote server was
@ -211,35 +402,33 @@ res_send(buf, buflen, answer, anslen)
*/
if (terrno == ECONNRESET && !connreset) {
connreset = 1;
ns--;
_res_close();
goto same_ns;
}
continue;
_res_close();
goto next_ns;
}
cp = answer;
if ((resplen = ntohs(*(u_short *)cp)) > anslen) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
fprintf(stderr,
";; response truncated\n");
#endif
len = anslen;
resplen = _getshort(ans);
if (resplen > anssiz) {
Dprint(_res.options & RES_DEBUG,
(stdout, ";; response truncated\n")
);
truncated = 1;
len = anssiz;
} else
len = resplen;
cp = ans;
while (len != 0 &&
(n = read(s, (char *)cp, (int)len)) > 0) {
(n = read(s, (char *)cp, (int)len)) > 0
) {
cp += n;
len -= n;
}
if (n <= 0) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("read failed");
#endif
(void) close(s);
s = -1;
continue;
Perror(stderr, "read(vc)", errno);
_res_close();
goto next_ns;
}
if (truncated) {
/*
@ -247,10 +436,13 @@ res_send(buf, buflen, answer, anslen)
* so connection stays in synch.
*/
anhp->tc = 1;
len = resplen - anslen;
len = resplen - anssiz;
while (len != 0) {
n = (len > sizeof(junk) ?
sizeof(junk) : len);
char junk[512];
n = (len > sizeof(junk)
? sizeof(junk)
: len);
if ((n = read(s, junk, n)) > 0)
len -= n;
else
@ -261,19 +453,23 @@ res_send(buf, buflen, answer, anslen)
/*
* Use datagrams.
*/
if (s < 0) {
s = socket(AF_INET, SOCK_DGRAM, 0);
struct timeval timeout;
fd_set dsmask;
struct sockaddr_in from;
int fromlen;
if ((s < 0) || vc) {
if (vc)
_res_close();
s = socket(AF_INET, SOCK_DGRAM, PF_UNSPEC);
if (s < 0) {
terrno = errno;
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("socket (dg) failed");
#endif
continue;
bad_dg_sock: terrno = errno;
Perror(stderr, "socket(dg)", errno);
return (-1);
}
connected = 0;
}
/*
* I'm tired of answering this question, so:
* On a 4.3BSD+ machine (client and server,
* actually), sending to a nameserver datagram
* port with no nameserver will cause an
@ -290,29 +486,29 @@ res_send(buf, buflen, answer, anslen)
*/
if (_res.nscount == 1 || (try == 0 && ns == 0)) {
/*
* Don't use connect if we might
* still receive a response
* from another server.
* Connect only if we are sure we won't
* receive a response from another server.
*/
if (connected == 0) {
if (!connected) {
if (connect(s,
(struct sockaddr *)
&_res.nsaddr_list[ns],
sizeof(struct sockaddr)) < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("connect");
#endif
continue;
(struct sockaddr *)nsap,
sizeof(struct sockaddr)
) < 0
) {
Aerror(stderr,
"connect(dg)",
errno, *nsap);
badns |= (1<<ns);
_res_close();
goto next_ns;
}
connected = 1;
}
if (send(s, buf, buflen, 0) != buflen) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("send");
#endif
continue;
Perror(stderr, "send", errno);
badns |= (1<<ns);
_res_close();
goto next_ns;
}
} else {
/*
@ -320,18 +516,26 @@ res_send(buf, buflen, answer, anslen)
* for responses from more than one server.
*/
if (connected) {
(void) connect(s, &no_addr,
sizeof(no_addr));
struct sockaddr_in no_addr;
no_addr.sin_family = AF_INET;
no_addr.sin_addr.s_addr = INADDR_ANY;
no_addr.sin_port = 0;
(void) connect(s,
(struct sockaddr *)
&no_addr,
sizeof(no_addr));
connected = 0;
errno = 0;
}
if (sendto(s, buf, buflen, 0,
(struct sockaddr *)&_res.nsaddr_list[ns],
sizeof(struct sockaddr)) != buflen) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("sendto");
#endif
continue;
(struct sockaddr *)nsap,
sizeof(struct sockaddr))
!= buflen) {
Aerror(stderr, "sendto", errno, *nsap);
badns |= (1<<ns);
_res_close();
goto next_ns;
}
}
@ -344,111 +548,162 @@ res_send(buf, buflen, answer, anslen)
if ((long) timeout.tv_sec <= 0)
timeout.tv_sec = 1;
timeout.tv_usec = 0;
wait:
wait:
FD_ZERO(&dsmask);
FD_SET(s, &dsmask);
n = select(s+1, &dsmask, (fd_set *)NULL,
(fd_set *)NULL, &timeout);
(fd_set *)NULL, &timeout);
if (n < 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("select");
#endif
continue;
Perror(stderr, "select", errno);
_res_close();
goto next_ns;
}
if (n == 0) {
/*
* timeout
*/
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; timeout\n");
#endif
Dprint(_res.options & RES_DEBUG,
(stdout, ";; timeout\n")
);
gotsomewhere = 1;
continue;
_res_close();
goto next_ns;
}
if ((resplen = recv(s, answer, anslen, 0)) <= 0) {
#ifdef DEBUG
if (_res.options & RES_DEBUG)
perror("recvfrom");
#endif
continue;
fromlen = sizeof(struct sockaddr_in);
resplen = recvfrom(s, ans, anssiz, 0,
(struct sockaddr *)&from, &fromlen);
if (resplen <= 0) {
Perror(stderr, "recvfrom", errno);
_res_close();
goto next_ns;
}
gotsomewhere = 1;
if (id != anhp->id) {
if (hp->id != anhp->id) {
/*
* response from old query, ignore it
* response from old query, ignore it.
* XXX - potential security hazard could
* be detected here.
*/
#ifdef DEBUG
if ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY)) {
printf(";; old answer:\n");
__p_query(answer);
}
#endif
DprintQ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY),
(stdout, ";; old answer:\n"),
ans);
goto wait;
}
#if CHECK_SRVR_ADDR
if (!(_res.options & RES_INSECURE1) &&
!our_server(&from)) {
/*
* response from wrong server? ignore it.
* XXX - potential security hazard could
* be detected here.
*/
DprintQ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY),
(stdout, ";; not our server:\n"),
ans);
goto wait;
}
if (anhp->rcode == SERVFAIL || anhp->rcode == NOTIMP ||
anhp->rcode == REFUSED) {
#ifdef DEBUG
if (_res.options & RES_DEBUG) {
printf("server rejected query:\n");
__p_query(answer);
}
#endif
if (!(_res.options & RES_INSECURE2) &&
!queries_match(buf, buf + buflen,
ans, ans + anssiz)) {
/*
* response contains wrong query? ignore it.
* XXX - potential security hazard could
* be detected here.
*/
DprintQ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY),
(stdout, ";; wrong query name:\n"),
ans);
goto wait;
}
if (anhp->rcode == SERVFAIL ||
anhp->rcode == NOTIMP ||
anhp->rcode == REFUSED) {
DprintQ(_res.options & RES_DEBUG,
(stdout, "server rejected query:\n"),
ans);
badns |= (1<<ns);
continue;
_res_close();
goto next_ns;
}
if (!(_res.options & RES_IGNTC) && anhp->tc) {
/*
* get rest of answer;
* use TCP with same server.
*/
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; truncated answer\n");
#endif
(void) close(s);
s = -1;
Dprint(_res.options & RES_DEBUG,
(stdout, ";; truncated answer\n")
);
v_circuit = 1;
goto usevc;
_res_close();
goto same_ns;
}
}
#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf(";; got answer:\n");
if ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY))
__p_query(answer);
#endif
} /*if vc/dg*/
DprintQ((_res.options & RES_DEBUG) ||
(_res.pfcode & RES_PRF_REPLY),
(stdout, ";; got answer:\n"),
ans);
/*
* If using virtual circuits, we assume that the first server
* is preferred * over the rest (i.e. it is on the local
* is preferred over the rest (i.e. it is on the local
* machine) and only keep that one open.
* If we have temporarily opened a virtual circuit,
* or if we haven't been asked to keep a socket open,
* close the socket.
*/
if ((v_circuit &&
((_res.options & RES_USEVC) == 0 || ns != 0)) ||
(_res.options & RES_STAYOPEN) == 0) {
(void) close(s);
s = -1;
if ((v_circuit && (!(_res.options & RES_USEVC) || ns != 0)) ||
!(_res.options & RES_STAYOPEN)) {
_res_close();
}
if (Rhook) {
int done = 0, loops = 0;
do {
res_sendhookact act;
act = (*Rhook)(nsap,
buf,
buflen,
ans,
anssiz,
&resplen);
switch (act) {
case res_goahead:
case res_done:
done = 1;
break;
case res_nextns:
_res_close();
goto next_ns;
case res_modified:
/* give the hook another try */
if (++loops < 42) /*doug adams*/
break;
/*FALLTHROUGH*/
case res_error:
/*FALLTHROUGH*/
default:
return (-1);
}
} while (!done);
}
return (resplen);
}
}
if (s >= 0) {
(void) close(s);
s = -1;
}
if (v_circuit == 0)
if (gotsomewhere == 0)
next_ns: ;
} /*foreach ns*/
} /*foreach retry*/
_res_close();
if (!v_circuit) {
if (!gotsomewhere)
errno = ECONNREFUSED; /* no nameservers found */
else
errno = ETIMEDOUT; /* no answer obtained */
else
} else {
errno = terrno;
}
return (-1);
}
@ -459,10 +714,13 @@ res_send(buf, buflen, answer, anslen)
*
* This routine is not expected to be user visible.
*/
void
_res_close()
{
if (s != -1) {
if (s >= 0) {
(void) close(s);
s = -1;
connected = 0;
vc = 0;
}
}