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glibc/nis/nis_callback.c
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/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Library General Public License as | |
published by the Free Software Foundation; either version 2 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 | |
Library General Public License for more details. | |
You should have received a copy of the GNU Library General Public | |
License along with the GNU C Library; see the file COPYING.LIB. If not, | |
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
Boston, MA 02111-1307, USA. */ | |
#include <errno.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <libintl.h> | |
#include <rpc/rpc.h> | |
#include <rpc/pmap_clnt.h> | |
#include <string.h> | |
#include <memory.h> | |
#include <syslog.h> | |
#include <sys/poll.h> | |
#include <sys/socket.h> | |
#include <netinet/in.h> | |
#include <arpa/inet.h> | |
#include <rpc/key_prot.h> | |
#include <rpcsvc/nis.h> | |
#include <rpcsvc/nis_callback.h> | |
#include <bits/libc-lock.h> | |
#include "nis_xdr.h" | |
#include "nis_intern.h" | |
/* Sorry, we are not able to make this threadsafe. Stupid. But some | |
functions doesn't send us a nis_result obj, so we don't have a | |
cookie. Maybe we could use keys for threads ? Have to learn more | |
about pthreads -- kukuk@vt.uni-paderborn.de */ | |
static nis_cb *data; | |
__libc_lock_define_initialized (static, callback) | |
#if 0 | |
static char * | |
__nis_getpkey(const char *sname) | |
{ | |
char buf[(strlen (sname) + 1) * 2 + 40]; | |
char pkey[HEXKEYBYTES + 1]; | |
char *cp, *domain; | |
nis_result *res; | |
unsigned int len = 0; | |
domain = strchr (sname, '.'); | |
if (domain == NULL) | |
return NULL; | |
/* Remove prefixing dot */ | |
++domain; | |
cp = stpcpy (buf, "[cname="); | |
cp = stpcpy (cp, sname); | |
cp = stpcpy (cp, ",auth_type=DES],cred.org_dir."); | |
cp = stpcpy (cp, domain); | |
res = nis_list (buf, USE_DGRAM|NO_AUTHINFO|FOLLOW_LINKS|FOLLOW_PATH, | |
NULL, NULL); | |
if (res == NULL) | |
return NULL; | |
if (NIS_RES_STATUS (res) != NIS_SUCCESS) | |
{ | |
nis_freeresult (res); | |
return NULL; | |
} | |
len = ENTRY_LEN(NIS_RES_OBJECT(res), 3); | |
strncpy (pkey, ENTRY_VAL(NIS_RES_OBJECT(res), 3), len); | |
pkey[len] = '\0'; | |
cp = strchr (pkey, ':'); | |
if (cp != NULL) | |
*cp = '\0'; | |
nis_freeresult (res); | |
return strdup (pkey); | |
} | |
#endif | |
static void | |
cb_prog_1 (struct svc_req *rqstp, SVCXPRT *transp) | |
{ | |
union | |
{ | |
cback_data cbproc_receive_1_arg; | |
nis_error cbproc_error_1_arg; | |
} | |
argument; | |
char *result; | |
xdrproc_t xdr_argument, xdr_result; | |
bool_t bool_result; | |
switch (rqstp->rq_proc) | |
{ | |
case NULLPROC: | |
svc_sendreply (transp, (xdrproc_t) xdr_void, (char *) NULL); | |
return; | |
case CBPROC_RECEIVE: | |
{ | |
unsigned int i; | |
xdr_argument = (xdrproc_t) xdr_cback_data; | |
xdr_result = (xdrproc_t) xdr_bool; | |
memset (&argument, 0, sizeof (argument)); | |
if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument)) | |
{ | |
svcerr_decode (transp); | |
return; | |
} | |
bool_result = FALSE; | |
for (i = 0; i < argument.cbproc_receive_1_arg.entries.entries_len; ++i) | |
{ | |
#define cbproc_entry(a) argument.cbproc_receive_1_arg.entries.entries_val[a] | |
char name[strlen (cbproc_entry(i)->zo_name) + | |
strlen (cbproc_entry(i)->zo_domain) + 3]; | |
char *cp; | |
cp = stpcpy (name, cbproc_entry(i)->zo_name); | |
*cp++ = '.'; | |
cp = stpcpy (cp, cbproc_entry(i)->zo_domain); | |
if ((data->callback) (name, cbproc_entry(i), data->userdata)) | |
{ | |
bool_result = TRUE; | |
data->nomore = 1; | |
data->result = NIS_SUCCESS; | |
break; | |
} | |
} | |
result = (char *) &bool_result; | |
} | |
break; | |
case CBPROC_FINISH: | |
xdr_argument = (xdrproc_t) xdr_void; | |
xdr_result = (xdrproc_t) xdr_void; | |
memset (&argument, 0, sizeof (argument)); | |
if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument)) | |
{ | |
svcerr_decode (transp); | |
return; | |
} | |
data->nomore = 1; | |
data->result = NIS_SUCCESS; | |
bool_result = TRUE; /* to make gcc happy, not necessary */ | |
result = (char *) &bool_result; | |
break; | |
case CBPROC_ERROR: | |
xdr_argument = (xdrproc_t) _xdr_nis_error; | |
xdr_result = (xdrproc_t) xdr_void; | |
memset (&argument, 0, sizeof (argument)); | |
if (!svc_getargs (transp, xdr_argument, (caddr_t) & argument)) | |
{ | |
svcerr_decode (transp); | |
return; | |
} | |
data->nomore = 1; | |
data->result = argument.cbproc_error_1_arg; | |
bool_result = TRUE; /* to make gcc happy, not necessary */ | |
result = (char *) &bool_result; | |
break; | |
default: | |
svcerr_noproc (transp); | |
return; | |
} | |
if (result != NULL && !svc_sendreply (transp, xdr_result, result)) | |
svcerr_systemerr (transp); | |
if (!svc_freeargs (transp, xdr_argument, (caddr_t) & argument)) | |
{ | |
fputs (_ ("unable to free arguments"), stderr); | |
exit (1); | |
} | |
return; | |
} | |
static nis_error | |
internal_nis_do_callback (struct dir_binding *bptr, netobj *cookie, | |
struct nis_cb *cb) | |
{ | |
struct timeval TIMEOUT = {25, 0}; | |
bool_t cb_is_running = FALSE; | |
data = cb; | |
for (;;) | |
{ | |
struct pollfd *my_pollfd; | |
int i; | |
if (svc_max_pollfd == 0 && svc_pollfd == NULL) | |
return NIS_CBERROR; | |
my_pollfd = malloc (sizeof (struct pollfd) * svc_max_pollfd); | |
for (i = 0; i < svc_max_pollfd; ++i) | |
{ | |
my_pollfd[i].fd = svc_pollfd[i].fd; | |
my_pollfd[i].events = svc_pollfd[i].events; | |
my_pollfd[i].revents = 0; | |
} | |
switch (i = __poll (my_pollfd, svc_max_pollfd, 25*1000)) | |
{ | |
case -1: | |
if (errno == EINTR) | |
continue; | |
return NIS_CBERROR; | |
case 0: | |
/* See if callback 'thread' in the server is still alive. */ | |
memset ((char *) &cb_is_running, 0, sizeof (cb_is_running)); | |
if (clnt_call (bptr->clnt, NIS_CALLBACK, (xdrproc_t) xdr_netobj, | |
(caddr_t) cookie, (xdrproc_t) xdr_bool, | |
(caddr_t) & cb_is_running, TIMEOUT) != RPC_SUCCESS) | |
cb_is_running = FALSE; | |
if (cb_is_running == FALSE) | |
{ | |
syslog (LOG_ERR, "NIS+: callback timed out"); | |
return NIS_CBERROR; | |
} | |
break; | |
default: | |
svc_getreq_poll (my_pollfd, i); | |
if (data->nomore) | |
return data->result; | |
} | |
} | |
} | |
nis_error | |
__nis_do_callback (struct dir_binding *bptr, netobj *cookie, | |
struct nis_cb *cb) | |
{ | |
nis_error result; | |
__libc_lock_lock (callback); | |
result = internal_nis_do_callback (bptr, cookie, cb); | |
__libc_lock_unlock (callback); | |
return result; | |
} | |
struct nis_cb * | |
__nis_create_callback (int (*callback) (const_nis_name, const nis_object *, | |
const void *), | |
const void *userdata, unsigned int flags) | |
{ | |
struct nis_cb *cb; | |
int sock = RPC_ANYSOCK; | |
struct sockaddr_in sin; | |
int len = sizeof (struct sockaddr_in); | |
char addr[NIS_MAXNAMELEN + 1]; | |
unsigned short port; | |
cb = (struct nis_cb *) calloc (1, sizeof (struct nis_cb)); | |
if (cb == NULL) | |
{ | |
syslog (LOG_ERR, "NIS+: out of memory allocating callback"); | |
return NULL; | |
} | |
cb->serv = (nis_server *) calloc (1, sizeof (nis_server)); | |
if (cb->serv == NULL) | |
{ | |
free (cb); | |
syslog (LOG_ERR, "NIS+: out of memory allocating callback"); | |
return NULL; | |
} | |
cb->serv->name = strdup (nis_local_principal ()); | |
cb->serv->ep.ep_val = (endpoint *) calloc (2, sizeof (endpoint)); | |
cb->serv->ep.ep_len = 1; | |
cb->serv->ep.ep_val[0].family = strdup ("inet"); | |
cb->callback = callback; | |
cb->userdata = userdata; | |
if ((flags & NO_AUTHINFO) || !key_secretkey_is_set ()) | |
{ | |
cb->serv->key_type = NIS_PK_NONE; | |
cb->serv->pkey.n_bytes = NULL; | |
cb->serv->pkey.n_len = 0; | |
} | |
else | |
{ | |
#if 0 | |
if ((cb->serv->pkey.n_bytes = __nis_getpkey (cb->serv->name)) == NULL) | |
{ | |
cb->serv->pkey.n_len = 0; | |
cb->serv->key_type = NIS_PK_NONE; | |
} | |
else | |
{ | |
cb->serv->key_type = NIS_PK_DH; | |
cb->serv->pkey.n_len = strlen(cb->serv->pkey.n_bytes); | |
} | |
#else | |
cb->serv->pkey.n_len =0; | |
cb->serv->pkey.n_bytes = NULL; | |
cb->serv->key_type = NIS_PK_NONE; | |
#endif | |
} | |
if (flags & USE_DGRAM) | |
{ | |
cb->serv->ep.ep_val[0].proto = strdup ("udp"); | |
cb->xprt = svcudp_bufcreate (sock, 100, 8192); | |
} | |
else | |
{ | |
cb->serv->ep.ep_val[0].proto = strdup ("tcp"); | |
cb->xprt = svctcp_create (sock, 100, 8192); | |
} | |
cb->sock = cb->xprt->xp_sock; | |
if (!svc_register (cb->xprt, CB_PROG, CB_VERS, cb_prog_1, 0)) | |
{ | |
xprt_unregister (cb->xprt); | |
svc_destroy (cb->xprt); | |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv); | |
free (cb->serv); | |
free (cb); | |
syslog (LOG_ERR, "NIS+: failed to register callback dispatcher"); | |
return NULL; | |
} | |
if (getsockname (cb->sock, (struct sockaddr *) &sin, &len) == -1) | |
{ | |
xprt_unregister (cb->xprt); | |
svc_destroy (cb->xprt); | |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv); | |
free (cb->serv); | |
free (cb); | |
syslog (LOG_ERR, "NIS+: failed to read local socket info"); | |
return NULL; | |
} | |
port = sin.sin_port; | |
get_myaddress (&sin); | |
snprintf (addr, sizeof (addr), "%s.%d.%d", inet_ntoa (sin.sin_addr), | |
port & 0x00FF, (port & 0xFF00) >> 8); | |
cb->serv->ep.ep_val[0].uaddr = strdup (addr); | |
return cb; | |
} | |
nis_error | |
__nis_destroy_callback (struct nis_cb *cb) | |
{ | |
xprt_unregister (cb->xprt); | |
svc_destroy (cb->xprt); | |
close (cb->sock); | |
xdr_free ((xdrproc_t) _xdr_nis_server, (char *) cb->serv); | |
free (cb->serv); | |
free (cb); | |
return NIS_SUCCESS; | |
} |