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freebsd-dev/lib/libc/yp/yplib.c

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Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
/*
* Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef LINT
Cosmetic changes and paranoia checks: ypbind.c: Make fewer assumtions about the state of the dom_alive and dom_broadcasting flags in roc_received(). If select() fails, use syslog() to report the error rather than perror(). Check that all our malloc()s succeed. Report malloc() failure in ypbindproc_setdom_2() to callers. yplib.c: Use #defined constants in ypbinderr_string() rather than hard-coded values.
1995-05-03 18:33:10 +00:00
static char *rcsid = "$Id: yplib.c,v 1.8 1995/04/26 19:03:05 wpaul Exp $";
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
#endif
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
More of the same: we also need to handle multiple domains properly even if /var/yp/binding/DOMAIN.VERS doesn't exist yet.
1995-04-09 21:52:31 +00:00
#include <stdlib.h>
#include <unistd.h>
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#ifndef BINDINGDIR
#define BINDINGDIR "/var/yp/binding"
#endif
#define YPMATCHCACHE
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
#define MAX_RETRIES 20
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
extern bool_t xdr_domainname(), xdr_ypbind_resp();
extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
extern bool_t xdr_ypresp_master();
int (*ypresp_allfn)();
void *ypresp_data;
struct dom_binding *_ypbindlist;
static char _yp_domain[MAXHOSTNAMELEN];
int _yplib_timeout = 10;
#ifdef YPMATCHCACHE
int _yplib_cache = 5;
static struct ypmatch_ent {
struct ypmatch_ent *next;
char *map, *key, *val;
int keylen, vallen;
time_t expire_t;
} *ypmc;
static void
ypmatch_add(map, key, keylen, val, vallen)
char *map;
char *key;
int keylen;
char *val;
int vallen;
{
struct ypmatch_ent *ep;
time_t t;
time(&t);
for(ep=ypmc; ep; ep=ep->next)
if(ep->expire_t < t)
break;
if(ep==NULL) {
ep = (struct ypmatch_ent *)malloc(sizeof *ep);
bzero((char *)ep, sizeof *ep);
if(ypmc)
ep->next = ypmc;
ypmc = ep;
}
if(ep->key)
free(ep->key);
if(ep->val)
free(ep->val);
ep->key = NULL;
ep->val = NULL;
ep->key = (char *)malloc(keylen);
if(ep->key==NULL)
return;
ep->val = (char *)malloc(vallen);
if(ep->key==NULL) {
free(ep->key);
ep->key = NULL;
return;
}
ep->keylen = keylen;
ep->vallen = vallen;
bcopy(key, ep->key, ep->keylen);
bcopy(val, ep->val, ep->vallen);
if(ep->map) {
if( strcmp(ep->map, map) ) {
free(ep->map);
ep->map = strdup(map);
}
} else {
ep->map = strdup(map);
}
ep->expire_t = t + _yplib_cache;
}
static bool_t
ypmatch_find(map, key, keylen, val, vallen)
char *map;
char *key;
int keylen;
char **val;
int *vallen;
{
struct ypmatch_ent *ep;
time_t t;
if(ypmc==NULL)
return 0;
time(&t);
for(ep=ypmc; ep; ep=ep->next) {
if(ep->keylen != keylen)
continue;
if(strcmp(ep->map, map))
continue;
if(bcmp(ep->key, key, keylen))
continue;
if(t > ep->expire_t)
continue;
*val = ep->val;
*vallen = ep->vallen;
return 1;
}
return 0;
}
#endif
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
char *
ypbinderr_string(incode)
int incode;
{
static char err[80];
switch(incode) {
case 0:
return "Success";
Cosmetic changes and paranoia checks: ypbind.c: Make fewer assumtions about the state of the dom_alive and dom_broadcasting flags in roc_received(). If select() fails, use syslog() to report the error rather than perror(). Check that all our malloc()s succeed. Report malloc() failure in ypbindproc_setdom_2() to callers. yplib.c: Use #defined constants in ypbinderr_string() rather than hard-coded values.
1995-05-03 18:33:10 +00:00
case YPBIND_ERR_ERR:
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
return "Internal ypbind error";
Cosmetic changes and paranoia checks: ypbind.c: Make fewer assumtions about the state of the dom_alive and dom_broadcasting flags in roc_received(). If select() fails, use syslog() to report the error rather than perror(). Check that all our malloc()s succeed. Report malloc() failure in ypbindproc_setdom_2() to callers. yplib.c: Use #defined constants in ypbinderr_string() rather than hard-coded values.
1995-05-03 18:33:10 +00:00
case YPBIND_ERR_NOSERV:
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
return "Domain not bound";
Cosmetic changes and paranoia checks: ypbind.c: Make fewer assumtions about the state of the dom_alive and dom_broadcasting flags in roc_received(). If select() fails, use syslog() to report the error rather than perror(). Check that all our malloc()s succeed. Report malloc() failure in ypbindproc_setdom_2() to callers. yplib.c: Use #defined constants in ypbinderr_string() rather than hard-coded values.
1995-05-03 18:33:10 +00:00
case YPBIND_ERR_RESC:
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
return "System resource allocation failure";
}
Cosmetic changes and paranoia checks: ypbind.c: Make fewer assumtions about the state of the dom_alive and dom_broadcasting flags in roc_received(). If select() fails, use syslog() to report the error rather than perror(). Check that all our malloc()s succeed. Report malloc() failure in ypbindproc_setdom_2() to callers. yplib.c: Use #defined constants in ypbinderr_string() rather than hard-coded values.
1995-05-03 18:33:10 +00:00
sprintf(err, "Unknown ypbind error: #%d\n", incode);
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
return err;
}
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
int
_yp_dobind(dom, ypdb)
char *dom;
struct dom_binding **ypdb;
{
static int pid = -1;
char path[MAXPATHLEN];
struct dom_binding *ysd, *ysd2;
struct ypbind_resp ypbr;
struct timeval tv;
struct sockaddr_in clnt_sin;
int clnt_sock, fd, gpid;
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;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
}
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);
}
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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. */
More of the same: we also need to handle multiple domains properly even if /var/yp/binding/DOMAIN.VERS doesn't exist yet.
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;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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. */
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
}
}
More of the same: we also need to handle multiple domains properly even if /var/yp/binding/DOMAIN.VERS doesn't exist yet.
1995-04-09 21:52:31 +00:00
skipit:
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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);
Fix behavior of YP library routines in environments with multiple domains, where one or more of the non-default domains are not yet bound. If we make a YP request for a domain other than the default domain, and there is no binding for the new domain yet, _yp_dobind() sees that the /var/yp/binding/DOMAIN.VERS file for the unbound domain is not locked (by ypbind) and from this it concludes that the NIS system is dead, so it gives up. This behavior has been changed: before giving up in this case, we now make a second check to see if the binding file for the *default* domain is also not locked. Only if the default domain binding file is also unlocked to we now assume that ypbind has bought the farm and bail out. (Note: this assumes that the user hasn't changed the default domain while ypbind is running.) With this change, _do_ypbind() is allowed to proceed into the next section of code wherein it prods ypbind into establishing a binding for the new domain. This first call times out after ten seconds, after which it should retry and succeed. From then on, the binding for the second domain should be handled normally.
1995-04-09 19:26:23 +00:00
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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);
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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,
Fix behavior of YP library routines in environments with multiple domains, where one or more of the non-default domains are not yet bound. If we make a YP request for a domain other than the default domain, and there is no binding for the new domain yet, _yp_dobind() sees that the /var/yp/binding/DOMAIN.VERS file for the unbound domain is not locked (by ypbind) and from this it concludes that the NIS system is dead, so it gives up. This behavior has been changed: before giving up in this case, we now make a second check to see if the binding file for the *default* domain is also not locked. Only if the default domain binding file is also unlocked to we now assume that ypbind has bought the farm and bail out. (Note: this assumes that the user hasn't changed the default domain while ypbind is running.) With this change, _do_ypbind() is allowed to proceed into the next section of code wherein it prods ypbind into establishing a binding for the new domain. This first call times out after ten seconds, after which it should retry and succeed. From then on, the binding for the second domain should be handled normally.
1995-04-09 19:26:23 +00:00
"YP: server for domain %s not responding, retrying\n", dom);
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
clnt_destroy(client);
ysd->dom_vers = -1;
goto again;
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
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;
small NIS binding fixes: ypbind.c: if a client program asks ypbind for the name of the server for a particular domain, and there isn't a binding for that domain available yet, ypbind needs to supply a status value along with its failure message. Set yprespbody.ypbind_error before returning from a ypbindproc_domain request. yplib.c: properly handle the error status messages ypbind now has the ability to send us. Add a ypbinderr_string() function to decode the error values. ypwhich.c: handle ypbind errors correctly: yperr_string() can't handle ypbind_status messages -- use ypbinderr_string instead.
1995-04-21 18:04:36 +00:00
}
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
Don't let yp_match() or yp_next() operate on null or empty keys: asking ypserv to do a yp_match() with an a null or empty key causes much havok. (Note that this could be construed as a denial of service attack if used maliciously.)
1995-03-23 22:23:15 +00:00
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
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;
Don't let yp_match() or yp_next() operate on null or empty keys: asking ypserv to do a yp_match() with an a null or empty key causes much havok. (Note that this could be construed as a denial of service attack if used maliciously.)
1995-03-23 22:23:15 +00:00
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
again:
if( _yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
#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
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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");
Reviewed by: Bill Paul <wpaul@freebsd.org> Submitted by: Sebastian Strollo <seb@erix.ericsson.se> - In /usr/src/lib/libc/yp/yplib.c, function yp_first when clnt_call fails with (r != RPC_SUCCESS) ysd->dom_vers should be set to 0! This ensures that /var/yp/bindings/dom.vers will be read again on retry. What happens now is that when our server is down and someone tries to use yp they will continue to try until kingdom come. So: if(r != RPC_SUCCESS) { clnt_perror(ysd->dom_client, "yp_first: clnt_call"); ysd->dom_vers = -1; ^^^^ change to 0 goto again; }
1995-03-21 00:48:55 +00:00
ysd->dom_vers = 0;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
1994-08-07 23:04:55 +00:00
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
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;
Don't let yp_match() or yp_next() operate on null or empty keys: asking ypserv to do a yp_match() with an a null or empty key causes much havok. (Note that this could be construed as a denial of service attack if used maliciously.)
1995-03-23 22:23:15 +00:00
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
*outkey = *outval = NULL;
*outkeylen = *outvallen = 0;
Don't let yp_match() or yp_next() operate on null or empty keys: asking ypserv to do a yp_match() with an a null or empty key causes much havok. (Note that this could be construed as a denial of service attack if used maliciously.)
1995-03-23 22:23:15 +00:00
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
}
More of the same: we also need to handle multiple domains properly even if /var/yp/binding/DOMAIN.VERS doesn't exist yet.
1995-04-09 21:52:31 +00:00
int
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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;
Add more sanity checks. *Lots* of sanity checks. Huge tracts of sanity checks. Make sure all arguments to the yp_*() functions are valid before sending them off to the server. This is somewhat distressing: once again my FreeBSD box brought down my entire network because of NIS bogosities. I *think* the poor argument checking in this module is the cause, but I still haven't been able to reproduce the exact series of events that lead to the ypserv crashes. For now I've resorted to sticking my FreeBSD box in a seprate domain. Hopefully a weekend of heavy testing will uncover the problem.
1995-03-24 21:21:37 +00:00
/* Sanity check */
if (indomain == NULL || !strlen(indomain))
return YPERR_BADARGS;
Add back in the YP code from 1.1.5. (This attribution brought to you by Theo de Raadt.) Added a new make flag variable, NO_YP_LIBC, which disables YP entirely. User-land programs to come later.
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:
return YPERR_NODOM;
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;
if( yp_bind(_yp_domain)==0 )
return 1;
return 0;
}
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