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adc4fa336b
- yp_main.c: Always add the resolver socket to the set of fds
monitored by select(). It can happen that pending == 0 but we
still have some data in the socket buffer from an old query.
This way, the data will be flushed in a timely manner.
- yp_extern.h: remove proto for yp_dns_pending() since we don't need
it anynmore.
- yp_server.c: call yp_async_lookup_name()/yp_async_lookup_addr()
functions with the svc_req pointer as an arg instead of the xprt.
(The svc_req struct includes a pointer to the transport handle,
and it also has the service version number which the async DNS
code will need. (see below))
- yp_dnslookup.c:
o Nuke yp_dns_pending() since we don't need it anymore.
o In yp_run_dnsq(), swallow up and ignore replies if no requests
are pending or the ID doesn't match any of the IDs in the queue.
o In yp_send_dns_reply(), we assume that we will always be
replying to an NIS v2 client. While this will probably always
be the case, we do support the v1 'match' procedure, and it
has a different result struct than v2. For completeness,
support replying to both NIS v1 and v2 clients.
o Update the queue entry structure to include a member to
keep track of the NIS version number.
o Have yp_async_lookup_name/addr() extract the version number
from the svc_req structure and save it with the queue entry
for yp_send_dns_reply() to inspect later.
o Add some comments.
113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/*
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* Copyright (c) 1995
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: yp_extern.h,v 1.4 1996/12/24 07:52:52 wpaul Exp $
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <limits.h>
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#include <db.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/yp.h>
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#ifndef _PATH_YP
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#define _PATH_YP "/var/yp/"
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#endif
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#ifndef _PATH_LIBEXEC
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#define _PATH_LIBEXEC "/usr/libexec/"
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#endif
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#ifndef MAX_CHILDREN
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#define MAX_CHILDREN 20
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#endif
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#define YP_SECURE 0x1
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#define YP_INTERDOMAIN 0x2
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/*
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* External functions and variables.
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*/
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extern int debug;
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extern int ypdb_debug;
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extern int do_dns;
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extern int children;
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extern int resfd;
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extern char *progname;
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extern char *yp_dir;
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extern enum ypstat yp_errno;
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extern void yp_error __P((const char *, ...));
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#ifdef DB_CACHE
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extern int yp_get_record __P(( DB *, const DBT *, DBT *, int));
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#else
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extern int yp_get_record __P(( const char *, const char *, const DBT *, DBT *, int));
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#endif
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extern int yp_first_record __P((const DB *, DBT *, DBT *, int));
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extern int yp_next_record __P((const DB *, DBT *, DBT *, int, int));
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extern char *yp_dnsname __P(( char * ));
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extern char *yp_dnsaddr __P(( const char * ));
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#ifdef DB_CACHE
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extern int yp_access __P((const char *, const char *, const struct svc_req * ));
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#else
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extern int yp_access __P((const char *, const struct svc_req * ));
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#endif
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extern int yp_validdomain __P((const char * ));
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extern DB *yp_open_db __P(( const char *, const char *));
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extern DB *yp_open_db_cache __P(( const char *, const char *, const char *, int ));
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extern void yp_flush_all __P(( void ));
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extern void yp_init_dbs __P(( void ));
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extern int yp_testflag __P(( char *, char *, int ));
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extern void load_securenets __P(( void ));
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#ifdef DB_CACHE
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extern ypstat yp_select_map __P(( char *, char *, keydat *, int ));
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extern ypstat yp_getbykey __P(( keydat *, valdat * ));
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extern ypstat yp_firstbykey __P(( keydat *, valdat * ));
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extern ypstat yp_nextbykey __P(( keydat *, valdat * ));
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#endif
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extern unsigned long svcudp_set_xid __P(( SVCXPRT *, unsigned long ));
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extern unsigned long svcudp_get_xid __P(( SVCXPRT * ));
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#ifndef RESOLVER_TIMEOUT
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#define RESOLVER_TIMEOUT 3600
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#endif
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extern int yp_init_resolver __P(( void ));
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extern void yp_run_dnsq __P(( void ));
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extern void yp_prune_dnsq __P(( void ));
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extern ypstat yp_async_lookup_name __P(( struct svc_req *, char * ));
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extern ypstat yp_async_lookup_addr __P(( struct svc_req *, char * ));
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