summaryrefslogtreecommitdiff
path: root/nis/nis_callback.c
diff options
context:
space:
mode:
Diffstat (limited to 'nis/nis_callback.c')
-rw-r--r--nis/nis_callback.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/nis/nis_callback.c b/nis/nis_callback.c
new file mode 100644
index 0000000000..48c1950dd7
--- /dev/null
+++ b/nis/nis_callback.c
@@ -0,0 +1,339 @@
+/* Copyright (C) 1997 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 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 <rpc/pmap_clnt.h>
+#include <string.h>
+#include <memory.h>
+#include <syslog.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <rpcsvc/nis.h>
+#include <bits/libc-lock.h>
+
+#include "nis_intern.h"
+
+extern void get_myaddress (struct sockaddr_in *addr);
+
+/* 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 */
+
+#define CB_PROG ((u_long)100302)
+#define CB_VERS ((u_long)1)
+#define CBPROC_RECEIVE ((u_long)1)
+#define CBPROC_FINISH ((u_long)2)
+#define CBPROC_ERROR ((u_long)3)
+
+typedef nis_object *obj_p;
+
+struct cback_data
+ {
+ struct
+ {
+ u_int entries_len;
+ obj_p *entries_val;
+ }
+ entries;
+ };
+typedef struct cback_data cback_data;
+
+static nis_cb *data;
+
+__libc_lock_define_initialized (static, callback)
+
+static bool_t xdr_cback_data (XDR *, cback_data *);
+
+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:
+ (void) svc_sendreply (transp, (xdrproc_t) xdr_void, (char *) NULL);
+ return;
+
+ case CBPROC_RECEIVE:
+ {
+ char name[NIS_MAXNAMELEN + 1];
+ u_long 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)
+ {
+ snprintf (name, NIS_MAXNAMELEN, "%s.%s",
+ argument.cbproc_receive_1_arg.entries.entries_val[i]->zo_name,
+ argument.cbproc_receive_1_arg.entries.entries_val[i]->zo_domain);
+
+ if ((data->callback)
+ (name, argument.cbproc_receive_1_arg.entries.entries_val[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 bool_t
+xdr_obj_p (XDR * xdrs, obj_p *objp)
+{
+ if (!xdr_pointer (xdrs, (char **) objp, sizeof (nis_object),
+ (xdrproc_t) xdr_nis_object))
+ return FALSE;
+ return TRUE;
+}
+
+static bool_t
+xdr_cback_data (XDR *xdrs, cback_data *objp)
+{
+ if (!xdr_array (xdrs, (char **) &objp->entries.entries_val,
+ (u_int *) & objp->entries.entries_len, ~0, sizeof (obj_p),
+ (xdrproc_t) xdr_obj_p))
+ return FALSE;
+ return TRUE;
+}
+
+static nis_error
+internal_nis_do_callback (struct dir_binding *bptr, netobj *cookie,
+ struct nis_cb *cb)
+{
+ /* Default timeout can be changed using clnt_control() */
+ static struct timeval TIMEOUT = {25, 0};
+#ifdef FD_SETSIZE
+ fd_set readfds;
+#else
+ int readfds;
+#endif /* def FD_SETSIZE */
+ struct timeval tv;
+ bool_t cb_is_running = FALSE;
+
+ data = cb;
+
+ for (;;)
+ {
+#ifdef FD_SETSIZE
+ readfds = svc_fdset;
+#else
+ readfds = svc_fds;
+#endif /* def FD_SETSIZE */
+ tv.tv_sec = 25;
+ tv.tv_usec = 0;
+ switch (select (_rpc_dtablesize (), &readfds, NULL, NULL, &tv))
+ {
+ 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_getreqset (&readfds);
+ 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, u_long 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_host ());
+ 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;
+
+ /* XXX Sometimes, we should add the public key of the user here ! */
+ cb->serv->key_type = NIS_PK_NONE;
+ cb->serv->pkey.n_bytes = NULL;
+ cb->serv->pkey.n_len = 0;
+
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 10:29:02 +0000