OpenE2K
/
glibc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
glibc/nis/nis_call.c

589 lines
14 KiB
C
Raw Blame History

/* Copyright (C) 1997, 1998, 2001, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <libintl.h>
#include <rpc/rpc.h>
#include <rpc/auth.h>
#include <rpcsvc/nis.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "nis_xdr.h"
#include "nis_intern.h"
static const struct timeval RPCTIMEOUT = {10, 0};
static const struct timeval UDPTIMEOUT = {5, 0};
extern u_short __pmap_getnisport (struct sockaddr_in *address, u_long program,
u_long version, u_int protocol);
unsigned long
inetstr2int (const char *str)
{
size_t j = 0;
for (size_t i = 0; str[i] != '\0'; ++i)
if (str[i] == '.' && ++j == 4)
{
char buffer[i + 1];
buffer[i] = '\0';
return inet_addr (memcpy (buffer, str, i));
}
return inet_addr (str);
}
void
__nisbind_destroy (dir_binding *bind)
{
if (bind->clnt != NULL)
{
if (bind->use_auth)
auth_destroy (bind->clnt->cl_auth);
clnt_destroy (bind->clnt);
}
}
libnsl_hidden_def (__nisbind_destroy)
nis_error
__nisbind_next (dir_binding *bind)
{
u_int j;
if (bind->clnt != NULL)
{
if (bind->use_auth)
auth_destroy (bind->clnt->cl_auth);
clnt_destroy (bind->clnt);
bind->clnt = NULL;
}
if (bind->trys >= bind->server_len)
return NIS_FAIL;
for (j = bind->current_ep + 1;
j < bind->server_val[bind->server_used].ep.ep_len; ++j)
if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family,
"inet") == 0)
if (bind->server_val[bind->server_used].ep.ep_val[j].proto[0] == '-')
{
bind->current_ep = j;
return NIS_SUCCESS;
}
++bind->trys;
++bind->server_used;
if (bind->server_used >= bind->server_len)
bind->server_used = 0;
for (j = 0; j < bind->server_val[bind->server_used].ep.ep_len; ++j)
if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family,
"inet") == 0)
if (bind->server_val[bind->server_used].ep.ep_val[j].proto[0] == '-')
{
bind->current_ep = j;
return NIS_SUCCESS;
}
return NIS_FAIL;
}
libnsl_hidden_def (__nisbind_next)
nis_error
__nisbind_connect (dir_binding *dbp)
{
nis_server *serv;
if (dbp == NULL)
return NIS_FAIL;
serv = &dbp->server_val[dbp->server_used];
memset (&dbp->addr, '\0', sizeof (dbp->addr));
dbp->addr.sin_family = AF_INET;
dbp->addr.sin_addr.s_addr =
inetstr2int (serv->ep.ep_val[dbp->current_ep].uaddr);
if (dbp->addr.sin_addr.s_addr == 0)
return NIS_FAIL;
/* Check, if the host is online and rpc.nisd is running. Much faster
then the clnt*_create functions: */
if (__pmap_getnisport (&dbp->addr, NIS_PROG, NIS_VERSION, IPPROTO_UDP) == 0)
return NIS_RPCERROR;
dbp->socket = RPC_ANYSOCK;
if (dbp->use_udp)
dbp->clnt = clntudp_create (&dbp->addr, NIS_PROG, NIS_VERSION,
UDPTIMEOUT, &dbp->socket);
else
dbp->clnt = clnttcp_create (&dbp->addr, NIS_PROG, NIS_VERSION,
&dbp->socket, 0, 0);
if (dbp->clnt == NULL)
return NIS_RPCERROR;
clnt_control (dbp->clnt, CLSET_TIMEOUT, (caddr_t) &RPCTIMEOUT);
/* If the program exists, close the socket */
if (fcntl (dbp->socket, F_SETFD, 1) == -1)
perror ("fcntl: F_SETFD");
if (dbp->use_auth)
{
if (serv->key_type == NIS_PK_DH)
{
char netname[MAXNETNAMELEN + 1];
char *p;
p = stpcpy (netname, "unix.");
strncpy (p, serv->name, MAXNETNAMELEN - 5);
netname[MAXNETNAMELEN] = '\0';
// XXX What is this supposed to do? If we really want to replace
// XXX the first dot, then we might as well use unix@ as the
// XXX prefix string. --drepper
p = strchr (netname, '.');
*p = '@';
dbp->clnt->cl_auth =
authdes_pk_create (netname, &serv->pkey, 300, NULL, NULL);
if (!dbp->clnt->cl_auth)
dbp->clnt->cl_auth = authunix_create_default ();
}
else
dbp->clnt->cl_auth = authunix_create_default ();
}
return NIS_SUCCESS;
}
libnsl_hidden_def (__nisbind_connect)
nis_error
__nisbind_create (dir_binding *dbp, const nis_server *serv_val,
unsigned int serv_len, unsigned int flags)
{
dbp->clnt = NULL;
dbp->server_len = serv_len;
dbp->server_val = (nis_server *)serv_val;
if (flags & USE_DGRAM)
dbp->use_udp = TRUE;
else
dbp->use_udp = FALSE;
if (flags & NO_AUTHINFO)
dbp->use_auth = FALSE;
else
dbp->use_auth = TRUE;
if (flags & MASTER_ONLY)
dbp->master_only = TRUE;
else
dbp->master_only = FALSE;
/* We try the first server */
dbp->trys = 1;
dbp->class = -1;
if (__nis_findfastest (dbp) < 1)
return NIS_NAMEUNREACHABLE;
return NIS_SUCCESS;
}
libnsl_hidden_def (__nisbind_create)
/* __nisbind_connect (dbp) must be run before calling this function !
So we could use the same binding twice */
nis_error
__do_niscall3 (dir_binding *dbp, u_long prog, xdrproc_t xargs, caddr_t req,
xdrproc_t xres, caddr_t resp, unsigned int flags, nis_cb *cb)
{
enum clnt_stat result;
nis_error retcode;
if (dbp == NULL)
return NIS_NAMEUNREACHABLE;
do
{
again:
result = clnt_call (dbp->clnt, prog, xargs, req, xres, resp, RPCTIMEOUT);
if (result != RPC_SUCCESS)
retcode = NIS_RPCERROR;
else
{
switch (prog)
{
case NIS_IBLIST:
if ((((nis_result *)resp)->status == NIS_CBRESULTS) &&
(cb != NULL))
{
__nis_do_callback (dbp, &((nis_result *) resp)->cookie, cb);
break;
}
/* Yes, the missing break is correct. If we doesn't have to
start a callback, look if we have to search another server */
case NIS_LOOKUP:
case NIS_ADD:
case NIS_MODIFY:
case NIS_REMOVE:
case NIS_IBADD:
case NIS_IBMODIFY:
case NIS_IBREMOVE:
case NIS_IBFIRST:
case NIS_IBNEXT:
if (((nis_result *)resp)->status == NIS_SYSTEMERROR
|| ((nis_result *)resp)->status == NIS_NOSUCHNAME
|| ((nis_result *)resp)->status == NIS_NOT_ME)
{
if (__nisbind_next (dbp) == NIS_SUCCESS)
{
while (__nisbind_connect (dbp) != NIS_SUCCESS)
{
if (__nisbind_next (dbp) != NIS_SUCCESS)
return NIS_SUCCESS;
}
}
else
break; /* No more servers to search in */
goto again;
}
break;
case NIS_FINDDIRECTORY:
if (((fd_result *)resp)->status == NIS_SYSTEMERROR
|| ((fd_result *)resp)->status == NIS_NOSUCHNAME
|| ((fd_result *)resp)->status == NIS_NOT_ME)
{
if (__nisbind_next (dbp) == NIS_SUCCESS)
{
while (__nisbind_connect (dbp) != NIS_SUCCESS)
{
if (__nisbind_next (dbp) != NIS_SUCCESS)
return NIS_SUCCESS;
}
}
else
break; /* No more servers to search in */
goto again;
}
break;
case NIS_DUMPLOG: /* log_result */
case NIS_DUMP:
if (((log_result *)resp)->lr_status == NIS_SYSTEMERROR
|| ((log_result *)resp)->lr_status == NIS_NOSUCHNAME
|| ((log_result *)resp)->lr_status == NIS_NOT_ME)
{
if (__nisbind_next (dbp) == NIS_SUCCESS)
{
while (__nisbind_connect (dbp) != NIS_SUCCESS)
{
if (__nisbind_next (dbp) != NIS_SUCCESS)
return NIS_SUCCESS;
}
}
else
break; /* No more servers to search in */
goto again;
}
break;
default:
break;
}
retcode = NIS_SUCCESS;
}
}
while ((flags & HARD_LOOKUP) && retcode == NIS_RPCERROR);
return retcode;
}
nis_error
__do_niscall2 (const nis_server *server, u_int server_len, u_long prog,
xdrproc_t xargs, caddr_t req, xdrproc_t xres, caddr_t resp,
unsigned int flags, nis_cb *cb)
{
dir_binding dbp;
nis_error status;
if (flags & MASTER_ONLY)
server_len = 1;
status = __nisbind_create (&dbp, server, server_len, flags);
if (status != NIS_SUCCESS)
return status;
while (__nisbind_connect (&dbp) != NIS_SUCCESS)
if (__nisbind_next (&dbp) != NIS_SUCCESS)
return NIS_NAMEUNREACHABLE;
status = __do_niscall3 (&dbp, prog, xargs, req, xres, resp, flags, cb);
__nisbind_destroy (&dbp);
return status;
}
static directory_obj *
rec_dirsearch (const_nis_name name, directory_obj *dir, nis_error *status)
{
fd_result *fd_res;
XDR xdrs;
switch (nis_dir_cmp (name, dir->do_name))
{
case SAME_NAME:
*status = NIS_SUCCESS;
return dir;
case NOT_SEQUENTIAL:
/* NOT_SEQUENTIAL means, go one up and try it there ! */
case HIGHER_NAME:
{ /* We need data from a parent domain */
directory_obj *obj;
char ndomain [strlen (name) + 3];
nis_domain_of_r (dir->do_name, ndomain, sizeof (ndomain));
/* The root server of our domain is a replica of the parent
domain ! (Now I understand why a root server must be a
replica of the parent domain) */
fd_res = __nis_finddirectory (dir, ndomain);
*status = fd_res->status;
if (fd_res->status != NIS_SUCCESS)
{
/* Try the current directory obj, maybe it works */
__free_fdresult (fd_res);
return dir;
}
obj = calloc (1, sizeof (directory_obj));
xdrmem_create (&xdrs, fd_res->dir_data.dir_data_val,
fd_res->dir_data.dir_data_len, XDR_DECODE);
_xdr_directory_obj (&xdrs, obj);
xdr_destroy (&xdrs);
__free_fdresult (fd_res);
if (obj != NULL)
{
/* We have found a NIS+ server serving ndomain, now
let us search for "name" */
nis_free_directory (dir);
return rec_dirsearch (name, obj, status);
}
else
{
/* Ups, very bad. Are we already the root server ? */
nis_free_directory (dir);
return NULL;
}
}
break;
case LOWER_NAME:
{
directory_obj *obj;
size_t namelen = strlen (name);
char leaf[namelen + 3];
char domain[namelen + 3];
char ndomain[namelen + 3];
char *cp;
u_int run = 0;
strcpy (domain, name);
do
{
if (domain[0] == '\0')
{
nis_free_directory (dir);
return NULL;
}
nis_leaf_of_r (domain, leaf, sizeof (leaf));
nis_domain_of_r (domain, ndomain, sizeof (ndomain));
strcpy (domain, ndomain);
++run;
}
while (nis_dir_cmp (domain, dir->do_name) != SAME_NAME);
if (run == 1)
{
/* We have found the directory above. Use it. */
return dir;
}
cp = strchr (leaf, '\0');
*cp++ = '.';
strcpy (cp, domain);
fd_res = __nis_finddirectory (dir, leaf);
*status = fd_res->status;
if (fd_res->status != NIS_SUCCESS)
{
/* Try the current directory object, maybe it works */
__free_fdresult (fd_res);
return dir;
}
obj = calloc(1, sizeof(directory_obj));
xdrmem_create(&xdrs, fd_res->dir_data.dir_data_val,
fd_res->dir_data.dir_data_len, XDR_DECODE);
_xdr_directory_obj(&xdrs, obj);
xdr_destroy(&xdrs);
__free_fdresult (fd_res);
if (obj != NULL)
{
/* We have found a NIS+ server serving ndomain, now
let us search for "name" */
nis_free_directory (dir);
return rec_dirsearch (name, obj, status);
}
}
break;
case BAD_NAME:
nis_free_directory (dir);
*status = NIS_BADNAME;
return NULL;
}
nis_free_directory (dir);
*status = NIS_FAIL;
return NULL;
}
/* We try to query the current server for the searched object,
maybe he know about it ? */
static directory_obj *
first_shoot (const_nis_name name, directory_obj *dir)
{
directory_obj *obj = NULL;
fd_result *fd_res;
XDR xdrs;
char domain[strlen (name) + 3];
if (nis_dir_cmp (name, dir->do_name) == SAME_NAME)
return dir;
nis_domain_of_r (name, domain, sizeof (domain));
if (nis_dir_cmp (domain, dir->do_name) == SAME_NAME)
return dir;
fd_res = __nis_finddirectory (dir, domain);
if (fd_res->status == NIS_SUCCESS
&& (obj = calloc (1, sizeof (directory_obj))) != NULL)
{
xdrmem_create(&xdrs, fd_res->dir_data.dir_data_val,
fd_res->dir_data.dir_data_len, XDR_DECODE);
_xdr_directory_obj (&xdrs, obj);
xdr_destroy (&xdrs);
}
__free_fdresult (fd_res);
if (obj != NULL)
nis_free_directory (dir);
return obj;
}
nis_error
__nisfind_server (const_nis_name name, directory_obj **dir)
{
if (name == NULL)
return NIS_BADNAME;
#if 0
/* Search in local cache. In the moment, we ignore the fastest server */
if (!(flags & NO_CACHE))
dir = __nis_cache_search (name, flags, &cinfo);
#endif
if (*dir == NULL)
{
nis_error status;
directory_obj *obj;
*dir = readColdStartFile ();
if (*dir == NULL) /* No /var/nis/NIS_COLD_START->no NIS+ installed */
return NIS_UNAVAIL;
/* Try at first, if servers in "dir" know our object */
obj = first_shoot (name, *dir);
if (obj == NULL)
{
*dir = rec_dirsearch (name, *dir, &status);
if (*dir == NULL)
return status;
}
else
*dir = obj;
}
return NIS_SUCCESS;
}
nis_error
__do_niscall (const_nis_name name, u_long prog, xdrproc_t xargs,
caddr_t req, xdrproc_t xres, caddr_t resp, unsigned int flags,
nis_cb *cb)
{
nis_error retcode;
dir_binding bptr;
directory_obj *dir = NULL;
nis_server *server;
u_int server_len;
int saved_errno = errno;
retcode = __nisfind_server (name, &dir);
if (retcode != NIS_SUCCESS)
return retcode;
if (flags & MASTER_ONLY)
{
server = dir->do_servers.do_servers_val;
server_len = 1;
}
else
{
server = dir->do_servers.do_servers_val;
server_len = dir->do_servers.do_servers_len;
}
retcode = __nisbind_create (&bptr, server, server_len, flags);
if (retcode == NIS_SUCCESS)
{
while (__nisbind_connect (&bptr) != NIS_SUCCESS)
{
if (__nisbind_next (&bptr) != NIS_SUCCESS)
{
nis_free_directory (dir);
return NIS_NAMEUNREACHABLE;
}
}
retcode = __do_niscall3 (&bptr, prog, xargs, req, xres, resp, flags, cb);
__nisbind_destroy (&bptr);
}
nis_free_directory (dir);
__set_errno (saved_errno);
return retcode;
}
Reference in New Issue View Git Blame Copy Permalink