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/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <libintl.h>
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#include <rpc/rpc.h>
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#include <rpc/pmap_clnt.h>
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#include <string.h>
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#include <memory.h>
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#include <syslog.h>
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <rpc/key_prot.h>
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#include <rpcsvc/nis.h>
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#include <rpcsvc/nis_callback.h>
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#include <libc-lock.h>
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#include "nis_xdr.h"
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#include "nis_intern.h"
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/* Sorry, we are not able to make this threadsafe. Stupid. But some
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functions doesn't send us a nis_result obj, so we don't have a
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cookie. Maybe we could use keys for threads ? Have to learn more
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about pthreads -- kukuk@vt.uni-paderborn.de */
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static nis_cb *data;
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__libc_lock_define_initialized (static, callback)
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#if 0
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static char *
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__nis_getpkey(const char *sname)
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{
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char buf[(strlen (sname) + 1) * 2 + 40];
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char pkey[HEXKEYBYTES + 1];
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char *cp, *domain;
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nis_result *res;
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unsigned int len = 0;
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domain = strchr (sname, '.');
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if (domain == NULL)
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return NULL;
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/* Remove prefixing dot */
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++domain;
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cp = stpcpy (buf, "[cname=");
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cp = stpcpy (cp, sname);
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cp = stpcpy (cp, ",auth_type=DES],cred.org_dir.");
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cp = stpcpy (cp, domain);
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res = nis_list (buf, USE_DGRAM|NO_AUTHINFO|FOLLOW_LINKS|FOLLOW_PATH,
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NULL, NULL);
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if (res == NULL)
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return NULL;
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if (NIS_RES_STATUS (res) != NIS_SUCCESS)
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{
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nis_freeresult (res);
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return NULL;
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}
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len = ENTRY_LEN(NIS_RES_OBJECT(res), 3);
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strncpy (pkey, ENTRY_VAL(NIS_RES_OBJECT(res), 3), len);
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pkey[len] = '\0';
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cp = strchr (pkey, ':');
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if (cp != NULL)
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*cp = '\0';
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nis_freeresult (res);
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return strdup (pkey);
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}
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#endif
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static void
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cb_prog_1 (struct svc_req *rqstp, SVCXPRT *transp)
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{
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union
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{
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cback_data cbproc_receive_1_arg;
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nis_error cbproc_error_1_arg;
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}
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argument;
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char *result;
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xdrproc_t xdr_argument, xdr_result;
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bool_t bool_result;
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switch (rqstp->rq_proc)
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{
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case NULLPROC:
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svc_sendreply (transp, (xdrproc_t) xdr_void, (char *) NULL);
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return;
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case CBPROC_RECEIVE:
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{
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unsigned int i;
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xdr_argument = (xdrproc_t) xdr_cback_data;
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xdr_result = (xdrproc_t) xdr_bool;
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memset (&argument, 0, sizeof (argument));
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if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument))
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{
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svcerr_decode (transp);
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return;
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}
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bool_result = FALSE;
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for (i = 0; i < argument.cbproc_receive_1_arg.entries.entries_len; ++i)
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{
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#define cbproc_entry(a) argument.cbproc_receive_1_arg.entries.entries_val[a]
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char name[strlen (cbproc_entry(i)->zo_name) +
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strlen (cbproc_entry(i)->zo_domain) + 3];
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char *cp;
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cp = stpcpy (name, cbproc_entry(i)->zo_name);
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*cp++ = '.';
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cp = stpcpy (cp, cbproc_entry(i)->zo_domain);
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if ((data->callback) (name, cbproc_entry(i), data->userdata))
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{
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bool_result = TRUE;
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data->nomore = 1;
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data->result = NIS_SUCCESS;
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break;
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}
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}
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result = (char *) &bool_result;
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}
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break;
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case CBPROC_FINISH:
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xdr_argument = (xdrproc_t) xdr_void;
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xdr_result = (xdrproc_t) xdr_void;
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memset (&argument, 0, sizeof (argument));
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if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument))
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{
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6c4009 |
svcerr_decode (transp);
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return;
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6c4009 |
}
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data->nomore = 1;
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6c4009 |
data->result = NIS_SUCCESS;
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bool_result = TRUE; /* to make gcc happy, not necessary */
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result = (char *) &bool_result;
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break;
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case CBPROC_ERROR:
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xdr_argument = (xdrproc_t) _xdr_nis_error;
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xdr_result = (xdrproc_t) xdr_void;
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6c4009 |
memset (&argument, 0, sizeof (argument));
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if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument))
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6c4009 |
{
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6c4009 |
svcerr_decode (transp);
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6c4009 |
return;
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6c4009 |
}
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6c4009 |
data->nomore = 1;
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6c4009 |
data->result = argument.cbproc_error_1_arg;
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6c4009 |
bool_result = TRUE; /* to make gcc happy, not necessary */
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6c4009 |
result = (char *) &bool_result;
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6c4009 |
break;
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6c4009 |
default:
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6c4009 |
svcerr_noproc (transp);
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6c4009 |
return;
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6c4009 |
}
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6c4009 |
if (result != NULL && !svc_sendreply (transp, xdr_result, result))
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6c4009 |
svcerr_systemerr (transp);
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|
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6c4009 |
if (!svc_freeargs (transp, xdr_argument, (caddr_t) & argument))
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6c4009 |
{
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6c4009 |
fputs (_ ("unable to free arguments"), stderr);
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6c4009 |
exit (1);
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6c4009 |
}
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6c4009 |
return;
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6c4009 |
}
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static nis_error
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internal_nis_do_callback (struct dir_binding *bptr, netobj *cookie,
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struct nis_cb *cb)
|
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{
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6c4009 |
struct timeval TIMEOUT = {25, 0};
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6c4009 |
bool_t cb_is_running;
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6c4009 |
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6c4009 |
data = cb;
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6c4009 |
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6c4009 |
for (;;)
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6c4009 |
{
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6c4009 |
struct pollfd my_pollfd[svc_max_pollfd];
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6c4009 |
int i;
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6c4009 |
|
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6c4009 |
if (svc_max_pollfd == 0 && svc_pollfd == NULL)
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return NIS_CBERROR;
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6c4009 |
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6c4009 |
for (i = 0; i < svc_max_pollfd; ++i)
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6c4009 |
{
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6c4009 |
my_pollfd[i].fd = svc_pollfd[i].fd;
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6c4009 |
my_pollfd[i].events = svc_pollfd[i].events;
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6c4009 |
my_pollfd[i].revents = 0;
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|
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6c4009 |
}
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6c4009 |
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switch (i = TEMP_FAILURE_RETRY (__poll (my_pollfd, svc_max_pollfd,
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25*1000)))
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|
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{
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Packit |
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case -1:
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return NIS_CBERROR;
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6c4009 |
case 0:
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Packit |
6c4009 |
/* See if callback 'thread' in the server is still alive. */
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6c4009 |
cb_is_running = FALSE;
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6c4009 |
if (clnt_call (bptr->clnt, NIS_CALLBACK, (xdrproc_t) xdr_netobj,
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6c4009 |
(caddr_t) cookie, (xdrproc_t) xdr_bool,
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(caddr_t) &cb_is_running, TIMEOUT) != RPC_SUCCESS)
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6c4009 |
cb_is_running = FALSE;
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6c4009 |
|
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6c4009 |
if (cb_is_running == FALSE)
|
|
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6c4009 |
{
|
|
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6c4009 |
syslog (LOG_ERR, "NIS+: callback timed out");
|
|
Packit |
6c4009 |
return NIS_CBERROR;
|
|
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6c4009 |
}
|
|
Packit |
6c4009 |
break;
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6c4009 |
default:
|
|
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6c4009 |
svc_getreq_poll (my_pollfd, i);
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|
Packit |
6c4009 |
if (data->nomore)
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|
Packit |
6c4009 |
return data->result;
|
|
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6c4009 |
}
|
|
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6c4009 |
}
|
|
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6c4009 |
}
|
|
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|
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6c4009 |
nis_error
|
|
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__nis_do_callback (struct dir_binding *bptr, netobj *cookie,
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6c4009 |
struct nis_cb *cb)
|
|
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6c4009 |
{
|
|
Packit |
6c4009 |
nis_error result;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
__libc_lock_lock (callback);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
result = internal_nis_do_callback (bptr, cookie, cb);
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|
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6c4009 |
|
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Packit |
6c4009 |
__libc_lock_unlock (callback);
|
|
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6c4009 |
|
|
Packit |
6c4009 |
return result;
|
|
Packit |
6c4009 |
}
|
|
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6c4009 |
|
|
Packit |
6c4009 |
struct nis_cb *
|
|
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6c4009 |
__nis_create_callback (int (*callback) (const_nis_name, const nis_object *,
|
|
Packit |
6c4009 |
const void *),
|
|
Packit |
6c4009 |
const void *userdata, unsigned int flags)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
struct nis_cb *cb;
|
|
Packit |
6c4009 |
int sock = RPC_ANYSOCK;
|
|
Packit |
6c4009 |
struct sockaddr_in sin;
|
|
Packit |
6c4009 |
socklen_t len = sizeof (struct sockaddr_in);
|
|
Packit |
6c4009 |
unsigned short port;
|
|
Packit |
6c4009 |
int nomsg = 0;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cb = (struct nis_cb *) calloc (1,
|
|
Packit |
6c4009 |
sizeof (struct nis_cb) + sizeof (nis_server));
|
|
Packit |
6c4009 |
if (__glibc_unlikely (cb == NULL))
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
cb->serv = (nis_server *) (cb + 1);
|
|
Packit |
6c4009 |
cb->serv->name = strdup (nis_local_principal ());
|
|
Packit |
6c4009 |
if (__glibc_unlikely (cb->serv->name == NULL))
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
cb->serv->ep.ep_val = (endpoint *) calloc (2, sizeof (endpoint));
|
|
Packit |
6c4009 |
if (__glibc_unlikely (cb->serv->ep.ep_val == NULL))
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
cb->serv->ep.ep_len = 1;
|
|
Packit |
6c4009 |
cb->serv->ep.ep_val[0].family = strdup ("inet");
|
|
Packit |
6c4009 |
if (__glibc_unlikely (cb->serv->ep.ep_val[0].family == NULL))
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
cb->callback = callback;
|
|
Packit |
6c4009 |
cb->userdata = userdata;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if ((flags & NO_AUTHINFO) || !key_secretkey_is_set ())
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
cb->serv->key_type = NIS_PK_NONE;
|
|
Packit |
6c4009 |
cb->serv->pkey.n_bytes = NULL;
|
|
Packit |
6c4009 |
cb->serv->pkey.n_len = 0;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
#if 0
|
|
Packit |
6c4009 |
if ((cb->serv->pkey.n_bytes = __nis_getpkey (cb->serv->name)) == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
cb->serv->pkey.n_len = 0;
|
|
Packit |
6c4009 |
cb->serv->key_type = NIS_PK_NONE;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
cb->serv->key_type = NIS_PK_DH;
|
|
Packit |
6c4009 |
cb->serv->pkey.n_len = strlen(cb->serv->pkey.n_bytes);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
#else
|
|
Packit |
6c4009 |
cb->serv->pkey.n_len =0;
|
|
Packit |
6c4009 |
cb->serv->pkey.n_bytes = NULL;
|
|
Packit |
6c4009 |
cb->serv->key_type = NIS_PK_NONE;
|
|
Packit |
6c4009 |
#endif
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
cb->serv->ep.ep_val[0].proto = strdup ((flags & USE_DGRAM) ? "udp" : "tcp");
|
|
Packit |
6c4009 |
if (__glibc_unlikely (cb->serv->ep.ep_val[0].proto == NULL))
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
cb->xprt = ((flags & USE_DGRAM)
|
|
Packit |
6c4009 |
? svcudp_bufcreate (sock, 100, 8192)
|
|
Packit |
6c4009 |
: svctcp_create (sock, 100, 8192));
|
|
Packit |
6c4009 |
if (cb->xprt == NULL)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
nomsg = 1;
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
cb->sock = cb->xprt->xp_sock;
|
|
Packit |
6c4009 |
if (!svc_register (cb->xprt, CB_PROG, CB_VERS, cb_prog_1, 0))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
xprt_unregister (cb->xprt);
|
|
Packit |
6c4009 |
svc_destroy (cb->xprt);
|
|
Packit |
6c4009 |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv);
|
|
Packit |
6c4009 |
free (cb);
|
|
Packit |
6c4009 |
syslog (LOG_ERR, "NIS+: failed to register callback dispatcher");
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (getsockname (cb->sock, (struct sockaddr *) &sin, &len) == -1)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
xprt_unregister (cb->xprt);
|
|
Packit |
6c4009 |
svc_destroy (cb->xprt);
|
|
Packit |
6c4009 |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv);
|
|
Packit |
6c4009 |
free (cb);
|
|
Packit |
6c4009 |
syslog (LOG_ERR, "NIS+: failed to read local socket info");
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
port = ntohs (sin.sin_port);
|
|
Packit |
6c4009 |
get_myaddress (&sin;;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (asprintf (&cb->serv->ep.ep_val[0].uaddr, "%s.%d.%d",
|
|
Packit |
6c4009 |
inet_ntoa (sin.sin_addr), (port & 0xFF00) >> 8, port & 0x00FF)
|
|
Packit |
6c4009 |
< 0)
|
|
Packit |
6c4009 |
goto failed;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return cb;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
failed:
|
|
Packit |
6c4009 |
if (cb)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (cb->xprt)
|
|
Packit |
6c4009 |
svc_destroy (cb->xprt);
|
|
Packit |
6c4009 |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv);
|
|
Packit |
6c4009 |
free (cb);
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
if (!nomsg)
|
|
Packit |
6c4009 |
syslog (LOG_ERR, "NIS+: out of memory allocating callback");
|
|
Packit |
6c4009 |
return NULL;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
nis_error
|
|
Packit |
6c4009 |
__nis_destroy_callback (struct nis_cb *cb)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
xprt_unregister (cb->xprt);
|
|
Packit |
6c4009 |
svc_destroy (cb->xprt);
|
|
Packit |
6c4009 |
close (cb->sock);
|
|
Packit |
6c4009 |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv);
|
|
Packit |
6c4009 |
free (cb);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
return NIS_SUCCESS;
|
|
Packit |
6c4009 |
}
|