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freebsd-skq/lib/libc/yp/yplib.c
wpaul b5a6d61144 Fix resource allocation problems: 
- Completely recoded the ypmatch cache code. The old code could leak
  memory: it would allow the cache to grow, but never
  shrink. The new code imposes the following limits:

	o The cache is capped at a limit of 5 entries.
	o Each entry expires after five seconds, at which point
	  its slot is freed.
	o If an insertion is to be done and all five slots
	  are filled, the oldest entry is forcibly expired
	  to release its slot.

  Also, the cache is implemented on a per-binding basis rather than
  having a global cache covering all bindings. This means that each
  bound domain has its own 5 slot cache.

- Changed clntudp_create() to clntudp_bufcreate() so that the
  xmit/recv message buffer sizes can be set explicitly. NIS transactions
  are rarely much larger than 1024 bytes since YPMAXRECORD is 1024.
  The defaults chosen by clntudb_create() are actually much larger
  than needed. I set the xmit buffer to a little over 1024 and the
  recv buffer to a little over 2048. This saves a few Kbytes for each
  NIS binding.

- Add my name to the copyright. I think I've made enough changes to
  this file to merit it. :)

Note: these changes should go into the 2.2.x branch, but I'm waiting
on feedback from a tester to see if the cache fixes solve the reported
memory leak problem.
1998-03-07 05:06:10 +00:00

1116 lines
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/*
* Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
* Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu>
* 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
static char *rcsid = "$Id: yplib.c,v 1.29 1997/04/10 20:26:04 wpaul Exp $";
#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>
#include <stdlib.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp.h>
/*
* We have to define these here due to clashes between yp_prot.h and
* yp.h.
*/
#define YPMATCHCACHE
#ifdef YPMATCHCACHE
struct ypmatch_ent {
char *ypc_map;
keydat ypc_key;
valdat ypc_val;
time_t ypc_expire_t;
struct ypmatch_ent *ypc_next;
};
#define YPLIB_MAXCACHE 5 /* At most 5 entries */
#define YPLIB_EXPIRE 5 /* Expire after 5 seconds */
#endif
struct dom_binding {
struct dom_binding *dom_pnext;
char dom_domain[YPMAXDOMAIN + 1];
struct sockaddr_in dom_server_addr;
u_short dom_server_port;
int dom_socket;
CLIENT *dom_client;
u_short dom_local_port; /* now I finally know what this is for. */
long dom_vers;
#ifdef YPMATCHCACHE
struct ypmatch_ent *cache;
int ypmatch_cachecnt;
#endif
};
#include <rpcsvc/ypclnt.h>
#ifndef BINDINGDIR
#define BINDINGDIR "/var/yp/binding"
#endif
#define MAX_RETRIES 20
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;
static void _yp_unbind __P(( struct dom_binding * ));
struct dom_binding *_ypbindlist;
static char _yp_domain[MAXHOSTNAMELEN];
int _yplib_timeout = 10;
#ifdef YPMATCHCACHE
static void ypmatch_cache_delete(ypdb, prev, cur)
struct dom_binding *ypdb;
struct ypmatch_ent *prev;
struct ypmatch_ent *cur;
{
if (prev == NULL)
ypdb->cache = cur->ypc_next;
else
prev->ypc_next = cur->ypc_next;
free(cur->ypc_map);
free(cur->ypc_key.keydat_val);
free(cur->ypc_val.valdat_val);
free(cur);
ypdb->ypmatch_cachecnt--;
return;
}
static void ypmatch_cache_flush(ypdb)
struct dom_binding *ypdb;
{
struct ypmatch_ent *n, *c = ypdb->cache;
while (c != NULL) {
n = c->ypc_next;
ypmatch_cache_delete(ypdb, NULL, c);
c = n;
}
return;
}
static void ypmatch_cache_expire(ypdb)
struct dom_binding *ypdb;
{
struct ypmatch_ent *c = ypdb->cache;
struct ypmatch_ent *n, *p = NULL;
time_t t;
time(&t);
while (c != NULL) {
if (t >= c->ypc_expire_t) {
n = c->ypc_next;
ypmatch_cache_delete(ypdb, p, c);
c = n;
} else {
p = c;
c = c->ypc_next;
}
}
return;
}
static void ypmatch_cache_insert(ypdb, map, key, val)
struct dom_binding *ypdb;
char *map;
keydat *key;
valdat *val;
{
struct ypmatch_ent *new;
/* Do an expire run to maybe open up a slot. */
if (ypdb->ypmatch_cachecnt)
ypmatch_cache_expire(ypdb);
/*
* If there are no slots free, then force an expire of
* the least recently used entry.
*/
if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
struct ypmatch_ent *o = NULL, *c = ypdb->cache;
time_t oldest = 0;
oldest = ~oldest;
while(c != NULL) {
if (c->ypc_expire_t < oldest) {
oldest = c->ypc_expire_t;
o = c;
}
c = c->ypc_next;
}
if (o == NULL)
return;
o->ypc_expire_t = 0;
ypmatch_cache_expire(ypdb);
}
new = malloc(sizeof(struct ypmatch_ent));
if (new == NULL)
return;
new->ypc_map = strdup(map);
if (new->ypc_map == NULL) {
free(new);
return;
}
new->ypc_key.keydat_val = malloc(key->keydat_len);
if (new->ypc_key.keydat_val == NULL) {
free(new->ypc_map);
free(new);
return;
}
new->ypc_val.valdat_val = malloc(val->valdat_len);
if (new->ypc_val.valdat_val == NULL) {
free(new->ypc_val.valdat_val);
free(new->ypc_map);
free(new);
return;
}
new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
new->ypc_key.keydat_len = key->keydat_len;
new->ypc_val.valdat_len = val->valdat_len;
bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
new->ypc_next = ypdb->cache;
ypdb->cache = new;
ypdb->ypmatch_cachecnt++;
return;
}
static bool_t ypmatch_cache_lookup(ypdb, map, key, val)
struct dom_binding *ypdb;
char *map;
keydat *key;
valdat *val;
{
struct ypmatch_ent *c = ypdb->cache;
ypmatch_cache_expire(ypdb);
for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
if (strcmp(map, c->ypc_map))
continue;
if (key->keydat_len != c->ypc_key.keydat_len)
continue;
if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
key->keydat_len))
continue;
}
if (c == NULL)
return(FALSE);
val->valdat_len = c->ypc_val.valdat_len;
val->valdat_val = c->ypc_val.valdat_val;
return(TRUE);
}
#endif
char *
ypbinderr_string(incode)
int incode;
{
static char err[80];
switch(incode) {
case 0:
return "Success";
case YPBIND_ERR_ERR:
return "Internal ypbind error";
case YPBIND_ERR_NOSERV:
return "Domain not bound";
case YPBIND_ERR_RESC:
return "System resource allocation failure";
}
sprintf(err, "Unknown ypbind error: #%d\n", incode);
return err;
}
int
_yp_dobind(dom, ypdb)
char *dom;
struct dom_binding **ypdb;
{
static pid_t 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;
pid_t gpid;
CLIENT *client;
int new = 0, r;
int retries = 0;
struct sockaddr_in check;
int checklen = sizeof(struct sockaddr_in);
/* Not allowed; bad doggie. Bad. */
if (strchr(dom, '/') != NULL)
return(YPERR_BADARGS);
gpid = getpid();
if( !(pid==-1 || pid==gpid) ) {
ysd = _ypbindlist;
while(ysd) {
if(ysd->dom_client != NULL)
_yp_unbind(ysd);
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;
} else {
/* Check the socket -- may have been hosed by the caller. */
if (getsockname(ysd->dom_socket, (struct sockaddr *)&check,
&checklen) == -1 || check.sin_family != AF_INET ||
check.sin_port != ysd->dom_local_port) {
/* Socket became bogus somehow... need to rebind. */
int save, sock;
sock = ysd->dom_socket;
save = dup(ysd->dom_socket);
if (ysd->dom_client != NULL)
clnt_destroy(ysd->dom_client);
ysd->dom_vers = 0;
ysd->dom_client = NULL;
sock = dup2(save, sock);
close(save);
}
}
again:
retries++;
if (retries > MAX_RETRIES) {
if (new)
free(ysd);
return(YPERR_YPBIND);
}
#ifdef BINDINGDIR
if(ysd->dom_vers==0) {
/*
* We're trying to make a new binding: zorch the
* existing handle now (if any).
*/
if(ysd->dom_client != NULL) {
clnt_destroy(ysd->dom_client);
ysd->dom_client = NULL;
ysd->dom_socket = -1;
}
sprintf(path, "%s/%s.%d", BINDINGDIR, dom, 2);
if( (fd=open(path, O_RDONLY)) == -1) {
/* no binding file, YP is dead. */
/* Try to bring it back to life. */
close(fd);
goto skipit;
}
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.s_addr =
*(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
ysd->dom_server_addr.sin_port =
*(u_short *)&ybr.ypbind_resp_u.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. */
/* Try to bring it back to life. */
close(fd);
goto skipit;
}
}
skipit:
#endif
if(ysd->dom_vers==-1 || ysd->dom_vers==0) {
/*
* We're trying to make a new binding: zorch the
* existing handle now (if any).
*/
if(ysd->dom_client != NULL) {
clnt_destroy(ysd->dom_client);
ysd->dom_client = NULL;
ysd->dom_socket = -1;
}
bzero((char *)&clnt_sin, sizeof clnt_sin);
clnt_sin.sin_family = AF_INET;
clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
clnt_sock = RPC_ANYSOCK;
client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
0, 0);
if(client==NULL) {
/*
* These conditions indicate ypbind just isn't
* alive -- we probably don't want to shoot our
* mouth off in this case; instead generate error
* messages only for really exotic problems.
*/
if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
(rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
rpc_createerr.cf_error.re_errno == ECONNREFUSED))
clnt_pcreateerror("clnttcp_create");
if(new)
free(ysd);
return (YPERR_YPBIND);
}
/*
* Check the port number -- should be < IPPORT_RESERVED.
* If not, it's possible someone has registered a bogus
* ypbind with the portmapper and is trying to trick us.
*/
if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
if (client != NULL)
clnt_destroy(client);
if (new)
free(ysd);
return(YPERR_YPBIND);
}
tv.tv_sec = _yplib_timeout/2;
tv.tv_usec = 0;
r = clnt_call(client, YPBINDPROC_DOMAIN,
xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv);
if(r != RPC_SUCCESS) {
clnt_destroy(client);
ysd->dom_vers = -1;
if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
if (new)
free(ysd);
return(YPERR_YPBIND);
}
fprintf(stderr,
"YP: server for domain %s not responding, retrying\n", dom);
goto again;
} else {
if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
clnt_destroy(client);
ysd->dom_vers = -1;
sleep(_yplib_timeout/2);
goto again;
}
}
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 =
*(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
ysd->dom_server_addr.sin_addr.s_addr =
*(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
/*
* We could do a reserved port check here too, but this
* could pose compatibility problems. The local ypbind is
* supposed to decide whether or not to trust yp servers
* on insecure ports. For now, we trust its judgement.
*/
ysd->dom_server_port =
*(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
gotit:
ysd->dom_vers = YPVERS;
strcpy(ysd->dom_domain, dom);
}
/* Don't rebuild the connection to the server unless we have to. */
if (ysd->dom_client == NULL) {
tv.tv_sec = _yplib_timeout/2;
tv.tv_usec = 0;
ysd->dom_socket = RPC_ANYSOCK;
ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
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");
/*
* We want a port number associated with this socket
* so that we can check its authenticity later.
*/
checklen = sizeof(struct sockaddr_in);
bzero((char *)&check, checklen);
bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
check.sin_family = AF_INET;
if (!getsockname(ysd->dom_socket,
(struct sockaddr *)&check, &checklen)) {
ysd->dom_local_port = check.sin_port;
} else {
clnt_destroy(ysd->dom_client);
if (new)
free(ysd);
return(YPERR_YPBIND);
}
}
if(new) {
ysd->dom_pnext = _ypbindlist;
_ypbindlist = ysd;
}
if(ypdb!=NULL)
*ypdb = ysd;
return 0;
}
static void
_yp_unbind(ypb)
struct dom_binding *ypb;
{
struct sockaddr_in check;
int checklen = sizeof(struct sockaddr_in);
if (ypb->dom_client != NULL) {
/* Check the socket -- may have been hosed by the caller. */
if (getsockname(ypb->dom_socket, (struct sockaddr *)&check,
&checklen) == -1 || check.sin_family != AF_INET ||
check.sin_port != ypb->dom_local_port) {
int save, sock;
sock = ypb->dom_socket;
save = dup(ypb->dom_socket);
clnt_destroy(ypb->dom_client);
sock = dup2(save, sock);
close(save);
} else
clnt_destroy(ypb->dom_client);
}
ypb->dom_client = NULL;
ypb->dom_socket = -1;
ypb->dom_vers = -1;
#ifdef YPMATCHCACHE
ypmatch_cache_flush(ypb);
#endif
}
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) {
_yp_unbind(ypb);
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;
/* Sanity check */
if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
inmap == NULL || !strlen(inmap) ||
indomain == NULL || !strlen(indomain))
return YPERR_BADARGS;
if (_yp_dobind(indomain, &ysd) != 0)
return(YPERR_DOMAIN);
yprk.domain = indomain;
yprk.map = inmap;
yprk.key.keydat_val = (char *)inkey;
yprk.key.keydat_len = inkeylen;
#ifdef YPMATCHCACHE
if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
/*
if( !strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
*/
*outvallen = yprv.val.valdat_len;
*outval = (char *)malloc(*outvallen+1);
bcopy(yprv.val.valdat_val, *outval, *outvallen);
(*outval)[*outvallen] = '\0';
return 0;
}
#endif
again:
if( _yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
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");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(yprv.stat)) ) {
*outvallen = yprv.val.valdat_len;
*outval = (char *)malloc(*outvallen+1);
bcopy(yprv.val.valdat_val, *outval, *outvallen);
(*outval)[*outvallen] = '\0';
#ifdef YPMATCHCACHE
ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
#endif
}
xdr_free(xdr_ypresp_val, (char *)&yprv);
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;
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
*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");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(yprkv.stat)) ) {
*outkeylen = yprkv.key.keydat_len;
*outkey = (char *)malloc(*outkeylen+1);
bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
(*outkey)[*outkeylen] = '\0';
*outvallen = yprkv.val.valdat_len;
*outval = (char *)malloc(*outvallen+1);
bcopy(yprkv.val.valdat_val, *outval, *outvallen);
(*outval)[*outvallen] = '\0';
}
xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
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;
/* Sanity check */
if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
inmap == NULL || !strlen(inmap) ||
indomain == NULL || !strlen(indomain))
return YPERR_BADARGS;
*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;
yprk.domain = indomain;
yprk.map = inmap;
yprk.key.keydat_val = inkey;
yprk.key.keydat_len = 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");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(yprkv.stat)) ) {
*outkeylen = yprkv.key.keydat_len;
*outkey = (char *)malloc(*outkeylen+1);
bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
(*outkey)[*outkeylen] = '\0';
*outvallen = yprkv.val.valdat_len;
*outval = (char *)malloc(*outvallen+1);
bcopy(yprkv.val.valdat_val, *outval, *outvallen);
(*outval)[*outvallen] = '\0';
}
xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
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, savstat;
int clnt_sock;
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
again:
if( _yp_dobind(indomain, &ysd) != 0)
return YPERR_DOMAIN;
tv.tv_sec = _yplib_timeout;
tv.tv_usec = 0;
/* YPPROC_ALL manufactures its own channel to ypserv using TCP */
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;
if (clnt_call(clnt, YPPROC_ALL,
xdr_ypreq_nokey, &yprnk,
xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_next: clnt_call");
clnt_destroy(clnt);
_yp_unbind(ysd);
goto again;
}
clnt_destroy(clnt);
savstat = status;
xdr_free(xdr_ypresp_all_seq, (char *)&status); /* not really needed... */
if(savstat != YP_NOMORE)
return ypprot_err(savstat);
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;
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
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);
/*
* NIS+ in YP compat mode doesn't support the YPPROC_ORDER
* procedure.
*/
if (r == RPC_PROCUNAVAIL) {
return(YPERR_YPERR);
}
if(r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_order: clnt_call");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(ypro.stat)) ) {
*outorder = ypro.ordernum;
}
xdr_free(xdr_ypresp_order, (char *)&ypro);
return (r);
}
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;
/* Sanity check */
if (indomain == NULL || !strlen(indomain) ||
inmap == NULL || !strlen(inmap))
return YPERR_BADARGS;
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");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(yprm.stat)) ) {
*outname = (char *)strdup(yprm.peer);
}
xdr_free(xdr_ypresp_master, (char *)&yprm);
return (r);
}
int
yp_maplist(indomain, outmaplist)
char *indomain;
struct ypmaplist **outmaplist;
{
struct dom_binding *ysd;
struct ypresp_maplist ypml;
struct timeval tv;
int r;
/* Sanity check */
if (indomain == NULL || !strlen(indomain))
return YPERR_BADARGS;
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,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv);
if (r != RPC_SUCCESS) {
clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
_yp_unbind(ysd);
goto again;
}
if( !(r=ypprot_err(ypml.stat)) ) {
*outmaplist = ypml.maps;
}
/* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
return (r);
}
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_DOMAIN;
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 ) {
yp_unbind(_yp_domain);
return 1;
}
return 0;
}
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