2011-02-06 07:45:09 +03:00
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/*
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Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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2013-05-29 04:38:37 +04:00
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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2013-04-14 21:32:01 +04:00
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#ifdef AROS
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#include "aros_compat.h"
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#endif
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2011-09-01 23:35:54 +04:00
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#ifdef WIN32
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#include "win32_compat.h"
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2013-05-29 04:54:12 +04:00
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#endif
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2011-08-28 13:43:33 +04:00
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2013-05-29 04:38:37 +04:00
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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2013-05-29 04:43:47 +04:00
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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2013-05-29 04:54:12 +04:00
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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2011-08-28 13:43:33 +04:00
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#include <stdio.h>
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2011-06-01 20:06:15 +04:00
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#include <stdlib.h>
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2012-07-04 10:53:12 +04:00
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#include <string.h>
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2012-11-24 20:18:54 +04:00
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#include <assert.h>
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2011-06-26 12:24:24 +04:00
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#include <errno.h>
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2011-02-06 07:45:09 +03:00
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#include "slist.h"
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2012-07-04 10:53:12 +04:00
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#include "libnfs-zdr.h"
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2011-02-06 07:45:09 +03:00
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#include "libnfs.h"
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#include "libnfs-raw.h"
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#include "libnfs-private.h"
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2012-07-04 10:53:12 +04:00
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struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, zdrproc_t zdr_decode_fn, int zdr_decode_bufsize)
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2011-02-06 07:45:09 +03:00
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{
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struct rpc_pdu *pdu;
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struct rpc_msg msg;
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2012-11-24 20:18:54 +04:00
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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2011-02-06 07:45:09 +03:00
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pdu = malloc(sizeof(struct rpc_pdu));
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if (pdu == NULL) {
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2011-06-19 03:38:20 +04:00
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rpc_set_error(rpc, "Out of memory: Failed to allocate pdu structure");
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2011-02-06 07:45:09 +03:00
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return NULL;
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}
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2011-09-03 08:11:22 +04:00
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memset(pdu, 0, sizeof(struct rpc_pdu));
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2011-02-06 07:45:09 +03:00
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pdu->xid = rpc->xid++;
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pdu->cb = cb;
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pdu->private_data = private_data;
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2012-07-04 10:53:12 +04:00
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pdu->zdr_decode_fn = zdr_decode_fn;
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pdu->zdr_decode_bufsize = zdr_decode_bufsize;
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2011-02-06 07:45:09 +03:00
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2012-07-04 10:53:12 +04:00
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zdrmem_create(&pdu->zdr, rpc->encodebuf, rpc->encodebuflen, ZDR_ENCODE);
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2011-06-26 11:30:00 +04:00
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if (rpc->is_udp == 0) {
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2012-07-04 10:53:12 +04:00
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zdr_setpos(&pdu->zdr, 4); /* skip past the record marker */
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2011-06-26 11:30:00 +04:00
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}
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2011-02-06 07:45:09 +03:00
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2011-09-03 08:11:22 +04:00
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memset(&msg, 0, sizeof(struct rpc_msg));
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2012-11-27 07:42:10 +04:00
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msg.xid = pdu->xid;
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msg.direction = CALL;
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msg.body.cbody.rpcvers = RPC_MSG_VERSION;
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msg.body.cbody.prog = program;
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msg.body.cbody.vers = version;
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msg.body.cbody.proc = procedure;
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msg.body.cbody.cred = rpc->auth->ah_cred;
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msg.body.cbody.verf = rpc->auth->ah_verf;
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2011-02-06 07:45:09 +03:00
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2012-07-04 10:53:12 +04:00
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if (zdr_callmsg(&pdu->zdr, &msg) == 0) {
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rpc_set_error(rpc, "zdr_callmsg failed");
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zdr_destroy(&pdu->zdr);
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2011-02-06 07:45:09 +03:00
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free(pdu);
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return NULL;
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}
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return pdu;
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}
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2012-11-24 20:18:54 +04:00
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void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu)
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2011-02-06 07:45:09 +03:00
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{
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2012-11-24 20:18:54 +04:00
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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2011-02-06 07:45:09 +03:00
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if (pdu->outdata.data != NULL) {
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free(pdu->outdata.data);
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pdu->outdata.data = NULL;
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}
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2012-07-04 10:53:12 +04:00
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if (pdu->zdr_decode_buf != NULL) {
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zdr_free(pdu->zdr_decode_fn, pdu->zdr_decode_buf);
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free(pdu->zdr_decode_buf);
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pdu->zdr_decode_buf = NULL;
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2011-02-06 07:45:09 +03:00
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}
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2012-07-04 10:53:12 +04:00
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zdr_destroy(&pdu->zdr);
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2011-06-19 16:31:34 +04:00
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2011-02-06 07:45:09 +03:00
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free(pdu);
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}
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2013-10-26 18:44:29 +04:00
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void rpc_set_next_xid(struct rpc_context *rpc, uint32_t xid)
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{
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rpc->xid = xid;
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}
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2011-02-06 07:45:09 +03:00
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int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu)
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{
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int size, recordmarker;
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2012-11-24 20:18:54 +04:00
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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2012-07-04 10:53:12 +04:00
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size = zdr_getpos(&pdu->zdr);
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2011-02-06 07:45:09 +03:00
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2011-06-26 12:24:24 +04:00
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/* for udp we dont queue, we just send it straight away */
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if (rpc->is_udp != 0) {
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2012-07-04 10:53:12 +04:00
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// XXX add a rpc->udp_dest_sock_size and get rid of sys/socket.h and netinet/in.h
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2011-06-26 12:24:24 +04:00
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if (sendto(rpc->fd, rpc->encodebuf, size, MSG_DONTWAIT, rpc->udp_dest, sizeof(struct sockaddr_in)) < 0) {
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rpc_set_error(rpc, "Sendto failed with errno %s", strerror(errno));
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rpc_free_pdu(rpc, pdu);
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return -1;
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}
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SLIST_ADD_END(&rpc->waitpdu, pdu);
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return 0;
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}
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2011-02-06 07:45:09 +03:00
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/* write recordmarker */
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2012-07-04 10:53:12 +04:00
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zdr_setpos(&pdu->zdr, 0);
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2011-02-06 07:45:09 +03:00
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recordmarker = (size - 4) | 0x80000000;
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2012-07-04 10:53:12 +04:00
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zdr_int(&pdu->zdr, &recordmarker);
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2011-02-06 07:45:09 +03:00
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pdu->outdata.size = size;
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pdu->outdata.data = malloc(pdu->outdata.size);
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if (pdu->outdata.data == NULL) {
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rpc_set_error(rpc, "Out of memory. Failed to allocate buffer for pdu\n");
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rpc_free_pdu(rpc, pdu);
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return -1;
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}
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memcpy(pdu->outdata.data, rpc->encodebuf, pdu->outdata.size);
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SLIST_ADD_END(&rpc->outqueue, pdu);
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return 0;
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}
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int rpc_get_pdu_size(char *buf)
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{
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uint32_t size;
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size = ntohl(*(uint32_t *)buf);
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return (size & 0x7fffffff) + 4;
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}
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2012-07-04 10:53:12 +04:00
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static int rpc_process_reply(struct rpc_context *rpc, struct rpc_pdu *pdu, ZDR *zdr)
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2011-02-06 07:45:09 +03:00
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{
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struct rpc_msg msg;
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2012-11-24 20:18:54 +04:00
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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2011-09-03 08:11:22 +04:00
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memset(&msg, 0, sizeof(struct rpc_msg));
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2012-11-27 07:42:10 +04:00
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msg.body.rbody.reply.areply.verf = _null_auth;
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2012-07-04 10:53:12 +04:00
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if (pdu->zdr_decode_bufsize > 0) {
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if (pdu->zdr_decode_buf != NULL) {
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free(pdu->zdr_decode_buf);
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2011-07-02 06:16:37 +04:00
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}
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2012-07-04 10:53:12 +04:00
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pdu->zdr_decode_buf = malloc(pdu->zdr_decode_bufsize);
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if (pdu->zdr_decode_buf == NULL) {
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rpc_set_error(rpc, "zdr_replymsg failed in portmap_getport_reply");
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pdu->cb(rpc, RPC_STATUS_ERROR, "Failed to allocate buffer for decoding of ZDR reply", pdu->private_data);
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2011-02-06 07:45:09 +03:00
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return 0;
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}
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2012-07-04 10:53:12 +04:00
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memset(pdu->zdr_decode_buf, 0, pdu->zdr_decode_bufsize);
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2011-02-06 07:45:09 +03:00
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}
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2012-11-27 07:42:10 +04:00
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msg.body.rbody.reply.areply.reply_data.results.where = pdu->zdr_decode_buf;
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msg.body.rbody.reply.areply.reply_data.results.proc = pdu->zdr_decode_fn;
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2011-02-06 07:45:09 +03:00
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2012-07-04 10:53:12 +04:00
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if (zdr_replymsg(zdr, &msg) == 0) {
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rpc_set_error(rpc, "zdr_replymsg failed in portmap_getport_reply");
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2011-02-06 07:45:09 +03:00
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pdu->cb(rpc, RPC_STATUS_ERROR, "Message rejected by server", pdu->private_data);
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2012-07-04 10:53:12 +04:00
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if (pdu->zdr_decode_buf != NULL) {
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free(pdu->zdr_decode_buf);
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pdu->zdr_decode_buf = NULL;
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2011-02-06 07:45:09 +03:00
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}
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return 0;
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}
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2012-11-27 07:42:10 +04:00
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if (msg.body.rbody.stat != MSG_ACCEPTED) {
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2011-02-06 07:45:09 +03:00
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pdu->cb(rpc, RPC_STATUS_ERROR, "RPC Packet not accepted by the server", pdu->private_data);
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return 0;
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}
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2012-11-27 07:42:10 +04:00
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switch (msg.body.rbody.reply.areply.stat) {
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2011-02-06 07:45:09 +03:00
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case SUCCESS:
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2012-07-04 10:53:12 +04:00
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pdu->cb(rpc, RPC_STATUS_SUCCESS, pdu->zdr_decode_buf, pdu->private_data);
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2011-02-06 07:45:09 +03:00
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break;
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case PROG_UNAVAIL:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program not available", pdu->private_data);
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break;
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case PROG_MISMATCH:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program version mismatch", pdu->private_data);
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break;
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case PROC_UNAVAIL:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Procedure not available", pdu->private_data);
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break;
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case GARBAGE_ARGS:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Garbage arguments", pdu->private_data);
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break;
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case SYSTEM_ERR:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: System Error", pdu->private_data);
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break;
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default:
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pdu->cb(rpc, RPC_STATUS_ERROR, "Unknown rpc response from server", pdu->private_data);
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break;
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}
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return 0;
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}
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int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size)
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{
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struct rpc_pdu *pdu;
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2012-07-04 10:53:12 +04:00
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ZDR zdr;
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2011-10-04 05:31:56 +04:00
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int pos, recordmarker = 0;
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2013-10-22 06:15:11 +04:00
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uint32_t xid;
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2011-10-04 05:31:56 +04:00
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char *reasbuf = NULL;
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2011-02-06 07:45:09 +03:00
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2012-11-24 20:18:54 +04:00
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assert(rpc->magic == RPC_CONTEXT_MAGIC);
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2012-07-04 10:53:12 +04:00
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memset(&zdr, 0, sizeof(ZDR));
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2011-02-06 07:45:09 +03:00
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2012-07-04 10:53:12 +04:00
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zdrmem_create(&zdr, buf, size, ZDR_DECODE);
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2011-06-26 12:24:24 +04:00
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if (rpc->is_udp == 0) {
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2012-07-04 10:53:12 +04:00
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if (zdr_int(&zdr, &recordmarker) == 0) {
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rpc_set_error(rpc, "zdr_int reading recordmarker failed");
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zdr_destroy(&zdr);
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2011-06-26 12:24:24 +04:00
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return -1;
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}
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2011-10-04 05:31:56 +04:00
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if (!(recordmarker&0x80000000)) {
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2012-07-04 10:53:12 +04:00
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zdr_destroy(&zdr);
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2011-10-04 05:31:56 +04:00
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if (rpc_add_fragment(rpc, buf+4, size-4) != 0) {
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rpc_set_error(rpc, "Failed to queue fragment for reassembly.");
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return -1;
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}
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return 0;
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}
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2011-02-06 07:45:09 +03:00
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}
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2011-10-04 05:31:56 +04:00
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/* reassembly */
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if (recordmarker != 0 && rpc->fragments != NULL) {
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struct rpc_fragment *fragment;
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2012-07-05 01:12:11 +04:00
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uint32_t total = size - 4;
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2011-10-04 05:31:56 +04:00
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char *ptr;
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2012-07-04 10:53:12 +04:00
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zdr_destroy(&zdr);
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2011-10-04 05:31:56 +04:00
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for (fragment = rpc->fragments; fragment; fragment = fragment->next) {
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total += fragment->size;
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}
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reasbuf = malloc(total);
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if (reasbuf == NULL) {
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rpc_set_error(rpc, "Failed to reassemble PDU");
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rpc_free_all_fragments(rpc);
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return -1;
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}
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ptr = reasbuf;
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for (fragment = rpc->fragments; fragment; fragment = fragment->next) {
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memcpy(ptr, fragment->data, fragment->size);
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ptr += fragment->size;
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}
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memcpy(ptr, buf + 4, size - 4);
|
2012-07-04 10:53:12 +04:00
|
|
|
zdrmem_create(&zdr, reasbuf, total, ZDR_DECODE);
|
2011-10-04 05:31:56 +04:00
|
|
|
rpc_free_all_fragments(rpc);
|
|
|
|
}
|
|
|
|
|
2012-07-04 10:53:12 +04:00
|
|
|
pos = zdr_getpos(&zdr);
|
|
|
|
if (zdr_int(&zdr, (int *)&xid) == 0) {
|
|
|
|
rpc_set_error(rpc, "zdr_int reading xid failed");
|
|
|
|
zdr_destroy(&zdr);
|
2011-10-04 05:31:56 +04:00
|
|
|
if (reasbuf != NULL) {
|
|
|
|
free(reasbuf);
|
|
|
|
}
|
2011-02-06 07:45:09 +03:00
|
|
|
return -1;
|
|
|
|
}
|
2012-07-04 10:53:12 +04:00
|
|
|
zdr_setpos(&zdr, pos);
|
2011-02-06 07:45:09 +03:00
|
|
|
|
|
|
|
for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
|
|
|
|
if (pdu->xid != xid) {
|
|
|
|
continue;
|
|
|
|
}
|
2011-06-26 12:24:24 +04:00
|
|
|
if (rpc->is_udp == 0 || rpc->is_broadcast == 0) {
|
|
|
|
SLIST_REMOVE(&rpc->waitpdu, pdu);
|
|
|
|
}
|
2012-07-04 10:53:12 +04:00
|
|
|
if (rpc_process_reply(rpc, pdu, &zdr) != 0) {
|
2011-06-19 03:38:20 +04:00
|
|
|
rpc_set_error(rpc, "rpc_procdess_reply failed");
|
2011-02-06 07:45:09 +03:00
|
|
|
}
|
2012-07-04 10:53:12 +04:00
|
|
|
zdr_destroy(&zdr);
|
2011-06-26 12:24:24 +04:00
|
|
|
if (rpc->is_udp == 0 || rpc->is_broadcast == 0) {
|
|
|
|
rpc_free_pdu(rpc, pdu);
|
|
|
|
}
|
2011-10-04 05:31:56 +04:00
|
|
|
if (reasbuf != NULL) {
|
|
|
|
free(reasbuf);
|
|
|
|
}
|
2011-02-06 07:45:09 +03:00
|
|
|
return 0;
|
|
|
|
}
|
2011-06-19 03:38:20 +04:00
|
|
|
rpc_set_error(rpc, "No matching pdu found for xid:%d", xid);
|
2012-07-04 10:53:12 +04:00
|
|
|
zdr_destroy(&zdr);
|
2011-10-04 05:31:56 +04:00
|
|
|
if (reasbuf != NULL) {
|
|
|
|
free(reasbuf);
|
|
|
|
}
|
2011-02-06 07:45:09 +03:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|