1994-08-07 23:04:55 +00:00
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/*
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* Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
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* 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. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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#ifndef LINT
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- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
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static char *rcsid = "$Id: yplib.c,v 1.12 1995/09/02 04:16:21 wpaul Exp $";
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1994-08-07 23:04:55 +00:00
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#endif
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <sys/uio.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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1995-04-09 21:52:31 +00:00
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#include <stdlib.h>
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#include <unistd.h>
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1994-08-07 23:04:55 +00:00
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#include <rpc/rpc.h>
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#include <rpc/xdr.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
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#ifndef YPBINDLOCK
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#define YPBINDLOCK "/var/run/ypbind.lock"
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#endif
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1994-08-07 23:04:55 +00:00
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#ifndef BINDINGDIR
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#define BINDINGDIR "/var/yp/binding"
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#endif
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#define YPMATCHCACHE
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ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
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#define MAX_RETRIES 20
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1994-08-07 23:04:55 +00:00
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extern bool_t xdr_domainname(), xdr_ypbind_resp();
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extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
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extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
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extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
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extern bool_t xdr_ypresp_master();
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int (*ypresp_allfn)();
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void *ypresp_data;
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struct dom_binding *_ypbindlist;
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static char _yp_domain[MAXHOSTNAMELEN];
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int _yplib_timeout = 10;
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#ifdef YPMATCHCACHE
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int _yplib_cache = 5;
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static struct ypmatch_ent {
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struct ypmatch_ent *next;
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char *map, *key, *val;
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int keylen, vallen;
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time_t expire_t;
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} *ypmc;
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static void
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ypmatch_add(map, key, keylen, val, vallen)
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char *map;
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char *key;
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int keylen;
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char *val;
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int vallen;
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{
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struct ypmatch_ent *ep;
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time_t t;
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time(&t);
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for(ep=ypmc; ep; ep=ep->next)
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if(ep->expire_t < t)
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break;
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if(ep==NULL) {
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ep = (struct ypmatch_ent *)malloc(sizeof *ep);
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bzero((char *)ep, sizeof *ep);
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if(ypmc)
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ep->next = ypmc;
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ypmc = ep;
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}
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if(ep->key)
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free(ep->key);
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if(ep->val)
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free(ep->val);
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ep->key = NULL;
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ep->val = NULL;
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ep->key = (char *)malloc(keylen);
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if(ep->key==NULL)
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return;
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ep->val = (char *)malloc(vallen);
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if(ep->key==NULL) {
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free(ep->key);
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ep->key = NULL;
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return;
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}
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ep->keylen = keylen;
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ep->vallen = vallen;
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bcopy(key, ep->key, ep->keylen);
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bcopy(val, ep->val, ep->vallen);
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if(ep->map) {
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if( strcmp(ep->map, map) ) {
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free(ep->map);
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ep->map = strdup(map);
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}
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} else {
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ep->map = strdup(map);
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}
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ep->expire_t = t + _yplib_cache;
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}
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static bool_t
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ypmatch_find(map, key, keylen, val, vallen)
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char *map;
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char *key;
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int keylen;
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char **val;
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int *vallen;
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{
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struct ypmatch_ent *ep;
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time_t t;
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if(ypmc==NULL)
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return 0;
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time(&t);
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for(ep=ypmc; ep; ep=ep->next) {
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if(ep->keylen != keylen)
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continue;
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if(strcmp(ep->map, map))
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continue;
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if(bcmp(ep->key, key, keylen))
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continue;
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if(t > ep->expire_t)
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continue;
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*val = ep->val;
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*vallen = ep->vallen;
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return 1;
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}
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return 0;
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}
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#endif
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1995-04-21 18:04:36 +00:00
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char *
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ypbinderr_string(incode)
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int incode;
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{
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static char err[80];
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switch(incode) {
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case 0:
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return "Success";
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1995-05-03 18:33:10 +00:00
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case YPBIND_ERR_ERR:
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1995-04-21 18:04:36 +00:00
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return "Internal ypbind error";
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1995-05-03 18:33:10 +00:00
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case YPBIND_ERR_NOSERV:
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1995-04-21 18:04:36 +00:00
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return "Domain not bound";
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1995-05-03 18:33:10 +00:00
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case YPBIND_ERR_RESC:
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1995-04-21 18:04:36 +00:00
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return "System resource allocation failure";
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}
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1995-05-03 18:33:10 +00:00
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sprintf(err, "Unknown ypbind error: #%d\n", incode);
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1995-04-21 18:04:36 +00:00
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return err;
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}
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1994-08-07 23:04:55 +00:00
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int
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_yp_dobind(dom, ypdb)
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char *dom;
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struct dom_binding **ypdb;
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{
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static int pid = -1;
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char path[MAXPATHLEN];
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struct dom_binding *ysd, *ysd2;
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struct ypbind_resp ypbr;
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struct timeval tv;
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struct sockaddr_in clnt_sin;
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- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
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int clnt_sock, lfd, fd, gpid;
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1994-08-07 23:04:55 +00:00
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|
|
CLIENT *client;
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
int new = 0, r;
|
|
|
|
|
int retries = 0;
|
1994-08-07 23:04:55 +00:00
|
|
|
|
|
|
|
|
gpid = getpid();
|
|
|
|
|
if( !(pid==-1 || pid==gpid) ) {
|
|
|
|
|
ysd = _ypbindlist;
|
|
|
|
|
while(ysd) {
|
|
|
|
|
if(ysd->dom_client)
|
|
|
|
|
clnt_destroy(ysd->dom_client);
|
|
|
|
|
ysd2 = ysd->dom_pnext;
|
|
|
|
|
free(ysd);
|
|
|
|
|
ysd = ysd2;
|
|
|
|
|
}
|
|
|
|
|
_ypbindlist = NULL;
|
|
|
|
|
}
|
|
|
|
|
pid = gpid;
|
|
|
|
|
|
|
|
|
|
if(ypdb!=NULL)
|
|
|
|
|
*ypdb = NULL;
|
|
|
|
|
|
|
|
|
|
if(dom==NULL || strlen(dom)==0)
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
|
|
|
|
|
for(ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
|
|
|
|
|
if( strcmp(dom, ysd->dom_domain) == 0)
|
|
|
|
|
break;
|
|
|
|
|
if(ysd==NULL) {
|
|
|
|
|
ysd = (struct dom_binding *)malloc(sizeof *ysd);
|
|
|
|
|
bzero((char *)ysd, sizeof *ysd);
|
|
|
|
|
ysd->dom_socket = -1;
|
|
|
|
|
ysd->dom_vers = 0;
|
|
|
|
|
new = 1;
|
|
|
|
|
}
|
- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
|
|
|
|
|
|
|
|
if ((lfd = open(YPBINDLOCK, O_RDONLY)) == -1)
|
|
|
|
|
return(YPERR_YPBIND);
|
|
|
|
|
errno = 0;
|
|
|
|
|
switch (flock(lfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
|
|
|
|
|
case 0:
|
|
|
|
|
close(lfd);
|
|
|
|
|
return (YPERR_YPBIND);
|
|
|
|
|
break;
|
|
|
|
|
case 1:
|
|
|
|
|
default:
|
|
|
|
|
close(lfd);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
again:
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
retries++;
|
|
|
|
|
if (retries > MAX_RETRIES) {
|
|
|
|
|
if (new)
|
|
|
|
|
free(ysd);
|
|
|
|
|
return(YPERR_YPBIND);
|
|
|
|
|
}
|
1994-08-07 23:04:55 +00:00
|
|
|
#ifdef BINDINGDIR
|
|
|
|
|
if(ysd->dom_vers==0) {
|
|
|
|
|
sprintf(path, "%s/%s.%d", BINDINGDIR, dom, 2);
|
|
|
|
|
if( (fd=open(path, O_RDONLY)) == -1) {
|
|
|
|
|
/* no binding file, YP is dead. */
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
/* Try to bring it back to life. */
|
1995-04-09 21:52:31 +00:00
|
|
|
close(fd);
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
goto skipit;
|
1994-08-07 23:04:55 +00:00
|
|
|
}
|
|
|
|
|
if( flock(fd, LOCK_EX|LOCK_NB) == -1 && errno==EWOULDBLOCK) {
|
|
|
|
|
struct iovec iov[2];
|
|
|
|
|
struct ypbind_resp ybr;
|
|
|
|
|
u_short ypb_port;
|
|
|
|
|
|
|
|
|
|
iov[0].iov_base = (caddr_t)&ypb_port;
|
|
|
|
|
iov[0].iov_len = sizeof ypb_port;
|
|
|
|
|
iov[1].iov_base = (caddr_t)&ybr;
|
|
|
|
|
iov[1].iov_len = sizeof ybr;
|
|
|
|
|
|
|
|
|
|
r = readv(fd, iov, 2);
|
|
|
|
|
if(r != iov[0].iov_len + iov[1].iov_len) {
|
|
|
|
|
close(fd);
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
|
|
|
|
|
ysd->dom_server_addr.sin_family = AF_INET;
|
|
|
|
|
ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
|
|
|
|
|
ysd->dom_server_addr.sin_addr =
|
|
|
|
|
ybr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr;
|
|
|
|
|
ysd->dom_server_addr.sin_port =
|
|
|
|
|
ybr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_port;
|
|
|
|
|
|
|
|
|
|
ysd->dom_server_port = ysd->dom_server_addr.sin_port;
|
|
|
|
|
close(fd);
|
|
|
|
|
goto gotit;
|
|
|
|
|
} else {
|
|
|
|
|
/* no lock on binding file, YP is dead. */
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
/* Try to bring it back to life. */
|
1994-08-07 23:04:55 +00:00
|
|
|
close(fd);
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
goto skipit;
|
1994-08-07 23:04:55 +00:00
|
|
|
}
|
|
|
|
|
}
|
1995-04-09 21:52:31 +00:00
|
|
|
skipit:
|
1994-08-07 23:04:55 +00:00
|
|
|
#endif
|
|
|
|
|
if(ysd->dom_vers==-1 || ysd->dom_vers==0) {
|
|
|
|
|
bzero((char *)&clnt_sin, sizeof clnt_sin);
|
|
|
|
|
clnt_sin.sin_family = AF_INET;
|
|
|
|
|
clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
1995-05-30 05:51:47 +00:00
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
clnt_sock = RPC_ANYSOCK;
|
|
|
|
|
client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
|
|
|
|
|
0, 0);
|
|
|
|
|
if(client==NULL) {
|
|
|
|
|
clnt_pcreateerror("clnttcp_create");
|
|
|
|
|
if(new)
|
|
|
|
|
free(ysd);
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
return (YPERR_YPBIND);
|
1994-08-07 23:04:55 +00:00
|
|
|
}
|
|
|
|
|
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
tv.tv_sec = _yplib_timeout/2;
|
1994-08-07 23:04:55 +00:00
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
r = clnt_call(client, YPBINDPROC_DOMAIN,
|
|
|
|
|
xdr_domainname, dom, xdr_ypbind_resp, &ypbr, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
fprintf(stderr,
|
1995-04-09 19:26:23 +00:00
|
|
|
"YP: server for domain %s not responding, retrying\n", dom);
|
1994-08-07 23:04:55 +00:00
|
|
|
clnt_destroy(client);
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
1995-04-21 18:04:36 +00:00
|
|
|
} else {
|
|
|
|
|
if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
|
ypbind.c: Major overhaul.
- Moved to a more client-driven model. We aggressively attempt to keep
the default domain bound (as before) but we give up on non-default
domains if we lose contact with a server and fail to get a response
after one round of broadcasting. This helps drastically reduce the
amount of network bandwitdh that ypbind consumes: if a client references
the secondary domain at some later point, this will prod ypbind into
establishing a new binding anyway, so continuously broadcasting without
need is pointless.
Note that we still actively seek out a binding for our default domain
even if no client program has queried us yet. I'm not exactly sure if
this matches SunOS's behavior or not, but I decided to do it this way
since we can get into all sorts of trouble if our default domain comes
unbound. Even so, we're still much quieter than we used to be.
- Removed a bunch of no-longer pertinent comments and a couple of
chunks of #ifdef 0'ed code that no longer fit in to the new layout.
- Theo deRaadt must have become frustrated with the callback mechanism
in clnt_broadcast(), because he shamelessly stole the clnt_broadcast()
code right out of the RPC library and hacked it up to suit his needs.
(Comments and all! :)
I can understand why: clnt_broadcast() blocks while awaiting replies.
Changing this behavior requires surgery. However, you can work around
this: fork the broadcast into a child process and relay the results
back to the parent via a pipe. (Careful obervation has shown that the
SunOS ypbind forks children for broadcasting too, though I can only
guess what sort of interprocess communication it uses. pipe() seems to
do the job well enough.)
This may seem like the long way around, but it's not really that
hard to implement, and I'd prefer to use documented RPC library functions
wherever possible. We're careful to limit the number of simultaneous
broadcasters to avoid swamping the system (the current limit is 5).
Each clnt_broadcast() call only sends out a small number of packets
at increasing intervals. We're also careful not to spawn more than one
bradcaster for a given domain.
- Used clntudp_bufcreate() and clnt_call() to implement a ping()
function for directly querying a particular server so that we can
check if it's still alive. This lets me completely remove the old
bradcasting code and use actual RPC library calls instead, at the
cost of more than a few handfulls of torn-out hair. (Make no mistake
folks: I *HATE* RPC.) Currently, the ping interval is one minute.
- Fixed another potential 'nfds too big for select()' bug: use
_rpc_dtablesize() instead of getdtablesize().
- Quieted gcc -Wall a bit.
- Probably a bunch of other stuff that I've forgotten.
ypbind.8:
- Updated man page to reflect modifications.
ypwhich.c:
- Small mind-o fix from last time: decode error results from
ypbind correctly (*groan*)
yplib.c:
- same as above
- Change behavior of _yp_dobind() a little: if we get back a 'Domain
not bound' error for a given domain, retry a few times before giving
up and passing the error back to the caller. We have to sleep for a
few seconds between tries since the 'Domain not bound' error comes
back immediately (by repeatedly looping, we end up pounding on ypbind).
We retry at most 20 times at 5 second intervals. This gives us a full
minute to get a response. This seems to deviate a bit from SunOS
behavior -- it appears to wait forever -- but I don't like the idea
of perpetually hanging inside a library call.
Note that this should fix the problems some people have with bindings
not being established fast enough at boot time; sometimes amd is started
in /etc/rc after ypbind has run but before it gets a binding set up. The
automounter gets annoyed at this and tends to exit. By pausing ther YP
calls until a binding is ready, we avoid this situation.
- Another _yp_dobind() change: if we determine that our binding files
are unlocked or nonexistent, jump directly to code that pokes ypbind
into restablishing the binding. Again, if it fails, we'll time out
eventually and return.
1995-04-26 19:03:16 +00:00
|
|
|
clnt_destroy(client);
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
sleep(_yplib_timeout/2);
|
|
|
|
|
goto again;
|
1995-04-21 18:04:36 +00:00
|
|
|
}
|
1994-08-07 23:04:55 +00:00
|
|
|
}
|
|
|
|
|
clnt_destroy(client);
|
|
|
|
|
|
|
|
|
|
bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
|
|
|
|
|
ysd->dom_server_addr.sin_family = AF_INET;
|
|
|
|
|
ysd->dom_server_addr.sin_port =
|
|
|
|
|
ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_port;
|
|
|
|
|
ysd->dom_server_addr.sin_addr.s_addr =
|
|
|
|
|
ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_addr.s_addr;
|
|
|
|
|
ysd->dom_server_port =
|
|
|
|
|
ypbr.ypbind_respbody.ypbind_bindinfo.ypbind_binding_port;
|
|
|
|
|
gotit:
|
|
|
|
|
ysd->dom_vers = YPVERS;
|
|
|
|
|
strcpy(ysd->dom_domain, dom);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout/2;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
if(ysd->dom_client)
|
|
|
|
|
clnt_destroy(ysd->dom_client);
|
|
|
|
|
ysd->dom_socket = RPC_ANYSOCK;
|
|
|
|
|
ysd->dom_client = clntudp_create(&ysd->dom_server_addr,
|
|
|
|
|
YPPROG, YPVERS, tv, &ysd->dom_socket);
|
|
|
|
|
if(ysd->dom_client==NULL) {
|
|
|
|
|
clnt_pcreateerror("clntudp_create");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
if( fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
|
|
|
|
|
perror("fcntl: F_SETFD");
|
|
|
|
|
|
|
|
|
|
if(new) {
|
|
|
|
|
ysd->dom_pnext = _ypbindlist;
|
|
|
|
|
_ypbindlist = ysd;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if(ypdb!=NULL)
|
|
|
|
|
*ypdb = ysd;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
_yp_unbind(ypb)
|
|
|
|
|
struct dom_binding *ypb;
|
|
|
|
|
{
|
|
|
|
|
clnt_destroy(ypb->dom_client);
|
|
|
|
|
ypb->dom_client = NULL;
|
|
|
|
|
ypb->dom_socket = -1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_bind(dom)
|
|
|
|
|
char *dom;
|
|
|
|
|
{
|
|
|
|
|
return _yp_dobind(dom, NULL);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
yp_unbind(dom)
|
|
|
|
|
char *dom;
|
|
|
|
|
{
|
|
|
|
|
struct dom_binding *ypb, *ypbp;
|
|
|
|
|
|
|
|
|
|
ypbp = NULL;
|
|
|
|
|
for(ypb=_ypbindlist; ypb; ypb=ypb->dom_pnext) {
|
|
|
|
|
if( strcmp(dom, ypb->dom_domain) == 0) {
|
|
|
|
|
clnt_destroy(ypb->dom_client);
|
|
|
|
|
if(ypbp)
|
|
|
|
|
ypbp->dom_pnext = ypb->dom_pnext;
|
|
|
|
|
else
|
|
|
|
|
_ypbindlist = ypb->dom_pnext;
|
|
|
|
|
free(ypb);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
ypbp = ypb;
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
const char *inkey;
|
|
|
|
|
int inkeylen;
|
|
|
|
|
char **outval;
|
|
|
|
|
int *outvallen;
|
|
|
|
|
{
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct ypresp_val yprv;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
struct ypreq_key yprk;
|
|
|
|
|
int r;
|
|
|
|
|
|
|
|
|
|
*outval = NULL;
|
|
|
|
|
*outvallen = 0;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
1995-03-23 22:23:15 +00:00
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
|
|
|
|
|
inmap == NULL || !strlen(inmap) ||
|
|
|
|
|
indomain == NULL || !strlen(indomain))
|
|
|
|
|
return YPERR_BADARGS;
|
1995-03-23 22:23:15 +00:00
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
#ifdef YPMATCHCACHE
|
|
|
|
|
if( !strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
|
|
|
|
|
inkeylen, &yprv.valdat.dptr, &yprv.valdat.dsize)) {
|
|
|
|
|
*outvallen = yprv.valdat.dsize;
|
|
|
|
|
*outval = (char *)malloc(*outvallen+1);
|
|
|
|
|
bcopy(yprv.valdat.dptr, *outval, *outvallen);
|
|
|
|
|
(*outval)[*outvallen] = '\0';
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
1995-09-02 04:16:21 +00:00
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
yprk.domain = indomain;
|
|
|
|
|
yprk.map = inmap;
|
|
|
|
|
yprk.keydat.dptr = (char *)inkey;
|
|
|
|
|
yprk.keydat.dsize = inkeylen;
|
|
|
|
|
|
|
|
|
|
bzero((char *)&yprv, sizeof yprv);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_MATCH,
|
|
|
|
|
xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_match: clnt_call");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
if( !(r=ypprot_err(yprv.status)) ) {
|
|
|
|
|
*outvallen = yprv.valdat.dsize;
|
|
|
|
|
*outval = (char *)malloc(*outvallen+1);
|
|
|
|
|
bcopy(yprv.valdat.dptr, *outval, *outvallen);
|
|
|
|
|
(*outval)[*outvallen] = '\0';
|
|
|
|
|
#ifdef YPMATCHCACHE
|
|
|
|
|
if( strcmp(_yp_domain, indomain)==0 )
|
|
|
|
|
ypmatch_add(inmap, inkey, inkeylen, *outval, *outvallen);
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
xdr_free(xdr_ypresp_val, (char *)&yprv);
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return r;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_get_default_domain(domp)
|
|
|
|
|
char **domp;
|
|
|
|
|
{
|
|
|
|
|
*domp = NULL;
|
|
|
|
|
if(_yp_domain[0] == '\0')
|
|
|
|
|
if( getdomainname(_yp_domain, sizeof _yp_domain))
|
|
|
|
|
return YPERR_NODOM;
|
|
|
|
|
*domp = _yp_domain;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
char **outkey;
|
|
|
|
|
int *outkeylen;
|
|
|
|
|
char **outval;
|
|
|
|
|
int *outvallen;
|
|
|
|
|
{
|
|
|
|
|
struct ypresp_key_val yprkv;
|
|
|
|
|
struct ypreq_nokey yprnk;
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
int r;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
|
|
|
|
|
|
|
|
|
if (indomain == NULL || !strlen(indomain) ||
|
|
|
|
|
inmap == NULL || !strlen(inmap))
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
*outkey = *outval = NULL;
|
|
|
|
|
*outkeylen = *outvallen = 0;
|
|
|
|
|
|
|
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
yprnk.domain = indomain;
|
|
|
|
|
yprnk.map = inmap;
|
|
|
|
|
bzero((char *)&yprkv, sizeof yprkv);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_FIRST,
|
|
|
|
|
xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_first: clnt_call");
|
1995-03-21 00:48:55 +00:00
|
|
|
ysd->dom_vers = 0;
|
1994-08-07 23:04:55 +00:00
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
if( !(r=ypprot_err(yprkv.status)) ) {
|
|
|
|
|
*outkeylen = yprkv.keydat.dsize;
|
|
|
|
|
*outkey = (char *)malloc(*outkeylen+1);
|
|
|
|
|
bcopy(yprkv.keydat.dptr, *outkey, *outkeylen);
|
|
|
|
|
(*outkey)[*outkeylen] = '\0';
|
|
|
|
|
*outvallen = yprkv.valdat.dsize;
|
|
|
|
|
*outval = (char *)malloc(*outvallen+1);
|
|
|
|
|
bcopy(yprkv.valdat.dptr, *outval, *outvallen);
|
|
|
|
|
(*outval)[*outvallen] = '\0';
|
|
|
|
|
}
|
|
|
|
|
xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return r;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
char *inkey;
|
|
|
|
|
int inkeylen;
|
|
|
|
|
char **outkey;
|
|
|
|
|
int *outkeylen;
|
|
|
|
|
char **outval;
|
|
|
|
|
int *outvallen;
|
|
|
|
|
{
|
|
|
|
|
struct ypresp_key_val yprkv;
|
|
|
|
|
struct ypreq_key yprk;
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
int r;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
1994-08-07 23:04:55 +00:00
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
|
|
|
|
|
inmap == NULL || !strlen(inmap) ||
|
|
|
|
|
indomain == NULL || !strlen(indomain))
|
|
|
|
|
return YPERR_BADARGS;
|
1995-03-23 22:23:15 +00:00
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
*outkey = *outval = NULL;
|
|
|
|
|
*outkeylen = *outvallen = 0;
|
1995-03-23 22:23:15 +00:00
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
yprk.domain = indomain;
|
|
|
|
|
yprk.map = inmap;
|
|
|
|
|
yprk.keydat.dptr = inkey;
|
|
|
|
|
yprk.keydat.dsize = inkeylen;
|
|
|
|
|
bzero((char *)&yprkv, sizeof yprkv);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_NEXT,
|
|
|
|
|
xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_next: clnt_call");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
if( !(r=ypprot_err(yprkv.status)) ) {
|
|
|
|
|
*outkeylen = yprkv.keydat.dsize;
|
|
|
|
|
*outkey = (char *)malloc(*outkeylen+1);
|
|
|
|
|
bcopy(yprkv.keydat.dptr, *outkey, *outkeylen);
|
|
|
|
|
(*outkey)[*outkeylen] = '\0';
|
|
|
|
|
*outvallen = yprkv.valdat.dsize;
|
|
|
|
|
*outval = (char *)malloc(*outvallen+1);
|
|
|
|
|
bcopy(yprkv.valdat.dptr, *outval, *outvallen);
|
|
|
|
|
(*outval)[*outvallen] = '\0';
|
|
|
|
|
}
|
|
|
|
|
xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return r;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_all(indomain, inmap, incallback)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
struct ypall_callback *incallback;
|
|
|
|
|
{
|
|
|
|
|
struct ypreq_nokey yprnk;
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
struct sockaddr_in clnt_sin;
|
|
|
|
|
CLIENT *clnt;
|
|
|
|
|
u_long status;
|
|
|
|
|
int clnt_sock;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
|
|
|
|
|
|
|
|
|
if (indomain == NULL || !strlen(indomain) ||
|
|
|
|
|
inmap == NULL || !strlen(inmap))
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
clnt_sock = RPC_ANYSOCK;
|
|
|
|
|
clnt_sin = ysd->dom_server_addr;
|
|
|
|
|
clnt_sin.sin_port = 0;
|
|
|
|
|
clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
|
|
|
|
|
if(clnt==NULL) {
|
|
|
|
|
printf("clnttcp_create failed\n");
|
|
|
|
|
return YPERR_PMAP;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
yprnk.domain = indomain;
|
|
|
|
|
yprnk.map = inmap;
|
|
|
|
|
ypresp_allfn = incallback->foreach;
|
|
|
|
|
ypresp_data = (void *)incallback->data;
|
|
|
|
|
|
|
|
|
|
(void) clnt_call(clnt, YPPROC_ALL,
|
|
|
|
|
xdr_ypreq_nokey, &yprnk, xdr_ypresp_all_seq, &status, tv);
|
|
|
|
|
clnt_destroy(clnt);
|
|
|
|
|
xdr_free(xdr_ypresp_all_seq, (char *)&status); /* not really needed... */
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
|
|
|
|
|
if(status != YP_FALSE)
|
|
|
|
|
return ypprot_err(status);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_order(indomain, inmap, outorder)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
int *outorder;
|
|
|
|
|
{
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct ypresp_order ypro;
|
|
|
|
|
struct ypreq_nokey yprnk;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
int r;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
|
|
|
|
|
|
|
|
|
if (indomain == NULL || !strlen(indomain) ||
|
|
|
|
|
inmap == NULL || !strlen(inmap))
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
yprnk.domain = indomain;
|
|
|
|
|
yprnk.map = inmap;
|
|
|
|
|
|
|
|
|
|
bzero((char *)(char *)&ypro, sizeof ypro);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_ORDER,
|
|
|
|
|
xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_order: clnt_call");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
*outorder = ypro.ordernum;
|
|
|
|
|
xdr_free(xdr_ypresp_order, (char *)&ypro);
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return ypprot_err(ypro.status);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
yp_master(indomain, inmap, outname)
|
|
|
|
|
char *indomain;
|
|
|
|
|
char *inmap;
|
|
|
|
|
char **outname;
|
|
|
|
|
{
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct ypresp_master yprm;
|
|
|
|
|
struct ypreq_nokey yprnk;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
int r;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
|
|
|
|
|
|
|
|
|
if (indomain == NULL || !strlen(indomain) ||
|
|
|
|
|
inmap == NULL || !strlen(inmap))
|
|
|
|
|
return YPERR_BADARGS;
|
1994-08-07 23:04:55 +00:00
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
yprnk.domain = indomain;
|
|
|
|
|
yprnk.map = inmap;
|
|
|
|
|
|
|
|
|
|
bzero((char *)&yprm, sizeof yprm);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_MASTER,
|
|
|
|
|
xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
|
|
|
|
|
if(r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_master: clnt_call");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
if( !(r=ypprot_err(yprm.status)) ) {
|
|
|
|
|
*outname = (char *)strdup(yprm.master);
|
|
|
|
|
}
|
|
|
|
|
xdr_free(xdr_ypresp_master, (char *)&yprm);
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return r;
|
|
|
|
|
}
|
1995-04-09 21:52:31 +00:00
|
|
|
int
|
1994-08-07 23:04:55 +00:00
|
|
|
yp_maplist(indomain, outmaplist)
|
|
|
|
|
char *indomain;
|
|
|
|
|
struct ypmaplist **outmaplist;
|
|
|
|
|
{
|
|
|
|
|
struct dom_binding *ysd;
|
|
|
|
|
struct ypresp_maplist ypml;
|
|
|
|
|
struct timeval tv;
|
|
|
|
|
int r;
|
|
|
|
|
|
1995-03-24 21:21:37 +00:00
|
|
|
/* Sanity check */
|
|
|
|
|
|
|
|
|
|
if (indomain == NULL || !strlen(indomain))
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
|
1994-08-07 23:04:55 +00:00
|
|
|
again:
|
|
|
|
|
if( _yp_dobind(indomain, &ysd) != 0)
|
|
|
|
|
return YPERR_DOMAIN;
|
|
|
|
|
|
|
|
|
|
tv.tv_sec = _yplib_timeout;
|
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
|
|
|
|
|
|
bzero((char *)&ypml, sizeof ypml);
|
|
|
|
|
|
|
|
|
|
r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
|
|
|
|
|
xdr_domainname, indomain, xdr_ypresp_maplist, &ypml, tv);
|
|
|
|
|
if (r != RPC_SUCCESS) {
|
|
|
|
|
clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
|
|
|
|
|
ysd->dom_vers = -1;
|
|
|
|
|
goto again;
|
|
|
|
|
}
|
|
|
|
|
*outmaplist = ypml.list;
|
|
|
|
|
/* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
|
|
|
|
|
_yp_unbind(ysd);
|
|
|
|
|
return ypprot_err(ypml.status);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
char *
|
|
|
|
|
yperr_string(incode)
|
|
|
|
|
int incode;
|
|
|
|
|
{
|
|
|
|
|
static char err[80];
|
|
|
|
|
|
|
|
|
|
switch(incode) {
|
|
|
|
|
case 0:
|
|
|
|
|
return "Success";
|
|
|
|
|
case YPERR_BADARGS:
|
|
|
|
|
return "Request arguments bad";
|
|
|
|
|
case YPERR_RPC:
|
|
|
|
|
return "RPC failure";
|
|
|
|
|
case YPERR_DOMAIN:
|
|
|
|
|
return "Can't bind to server which serves this domain";
|
|
|
|
|
case YPERR_MAP:
|
|
|
|
|
return "No such map in server's domain";
|
|
|
|
|
case YPERR_KEY:
|
|
|
|
|
return "No such key in map";
|
|
|
|
|
case YPERR_YPERR:
|
|
|
|
|
return "YP server error";
|
|
|
|
|
case YPERR_RESRC:
|
|
|
|
|
return "Local resource allocation failure";
|
|
|
|
|
case YPERR_NOMORE:
|
|
|
|
|
return "No more records in map database";
|
|
|
|
|
case YPERR_PMAP:
|
|
|
|
|
return "Can't communicate with portmapper";
|
|
|
|
|
case YPERR_YPBIND:
|
|
|
|
|
return "Can't communicate with ypbind";
|
|
|
|
|
case YPERR_YPSERV:
|
|
|
|
|
return "Can't communicate with ypserv";
|
|
|
|
|
case YPERR_NODOM:
|
|
|
|
|
return "Local domain name not set";
|
|
|
|
|
case YPERR_BADDB:
|
|
|
|
|
return "Server data base is bad";
|
|
|
|
|
case YPERR_VERS:
|
|
|
|
|
return "YP server version mismatch - server can't supply service.";
|
|
|
|
|
case YPERR_ACCESS:
|
|
|
|
|
return "Access violation";
|
|
|
|
|
case YPERR_BUSY:
|
|
|
|
|
return "Database is busy";
|
|
|
|
|
}
|
|
|
|
|
sprintf(err, "YP unknown error %d\n", incode);
|
|
|
|
|
return err;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
ypprot_err(incode)
|
|
|
|
|
unsigned int incode;
|
|
|
|
|
{
|
|
|
|
|
switch(incode) {
|
|
|
|
|
case YP_TRUE:
|
|
|
|
|
return 0;
|
|
|
|
|
case YP_FALSE:
|
|
|
|
|
return YPERR_YPBIND;
|
|
|
|
|
case YP_NOMORE:
|
|
|
|
|
return YPERR_NOMORE;
|
|
|
|
|
case YP_NOMAP:
|
|
|
|
|
return YPERR_MAP;
|
|
|
|
|
case YP_NODOM:
|
1995-07-05 06:04:20 +00:00
|
|
|
return YPERR_DOMAIN;
|
1994-08-07 23:04:55 +00:00
|
|
|
case YP_NOKEY:
|
|
|
|
|
return YPERR_KEY;
|
|
|
|
|
case YP_BADOP:
|
|
|
|
|
return YPERR_YPERR;
|
|
|
|
|
case YP_BADDB:
|
|
|
|
|
return YPERR_BADDB;
|
|
|
|
|
case YP_YPERR:
|
|
|
|
|
return YPERR_YPERR;
|
|
|
|
|
case YP_BADARGS:
|
|
|
|
|
return YPERR_BADARGS;
|
|
|
|
|
case YP_VERS:
|
|
|
|
|
return YPERR_VERS;
|
|
|
|
|
}
|
|
|
|
|
return YPERR_YPERR;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
_yp_check(dom)
|
|
|
|
|
char **dom;
|
|
|
|
|
{
|
|
|
|
|
char *unused;
|
|
|
|
|
|
|
|
|
|
if( _yp_domain[0]=='\0' )
|
|
|
|
|
if( yp_get_default_domain(&unused) )
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if(dom)
|
|
|
|
|
*dom = _yp_domain;
|
|
|
|
|
|
- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
|
|
|
if( yp_bind(_yp_domain)==0 ) {
|
|
|
|
|
yp_unbind(_yp_domain);
|
1994-08-07 23:04:55 +00:00
|
|
|
return 1;
|
- Make _do_ypbind() check for /var/run/ypbind.lock and attempt to flock()
it before before trying to establish a binding. If /var/run/ypbind.lock
doesn't exist, or if it exists and isn't locked, then ypbind isn't
running, which means NIS is either turned off or hosed.
- Have _yp_check() call yp_unbind() after it sucessfully calls yp_bind()
to make sure it frees resources correctly. (I don't think there's really
a memory leak here, but it seems somehow wrong to call yp_bind() without
making a corresponding call to yp_unbind() afterwards.)
This makes the NIS code behave a little better in cases where libc makes
calls to NIS, but it isn't running correctly (i.e. there's no ypbind).
This cleans up some strange libc behavior that manifests itself if
you have the system domain name set, but aren't actually running NIS.
In this event, the getrpcent(3) code could try to call into NIS and
cause several inexplicable "clnttcp_create error: RPC program not
registered" messages to appear. This happens because _yp_check() checks
if the system domain name is set and, if it is, proceeds to call
yp_bind() to attempt to establish a binding. Since there is no
binding file (remember: ypbind isn't running, so /var/yp/binding
will be empty), _yp_dobind() will attempt to contact ypbind to
prod it into binding the domain. And because ypbind isn't running,
the code generates the 'clnttcp_create' error. Ultimately the
_yp_check() fails and the getrpcent(3) code rolls over to the /etc/rpc
file, but the error messages are annoying, and the code should be
smart enough to forgo the binding attempt when NIS is turned off.
1995-11-05 05:39:04 +00:00
|
|
|
}
|
1994-08-07 23:04:55 +00:00
|
|
|
return 0;
|
|
|
|
|
}
|
