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![Warner Losh](/assets/img/avatar_default.png)
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
835 lines
22 KiB
C
835 lines
22 KiB
C
/* $NetBSD: clnt_vc.c,v 1.4 2000/07/14 08:40:42 fvdl Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* clnt_tcp.c, Implements a TCP/IP based, client side RPC.
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*
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* TCP based RPC supports 'batched calls'.
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* A sequence of calls may be batched-up in a send buffer. The rpc call
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* return immediately to the client even though the call was not necessarily
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* sent. The batching occurs if the results' xdr routine is NULL (0) AND
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* the rpc timeout value is zero (see clnt.h, rpc).
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*
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* Clients should NOT casually batch calls that in fact return results; that is,
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* the server side should be aware that a call is batched and not produce any
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* return message. Batched calls that produce many result messages can
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* deadlock (netlock) the client and the server....
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*
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* Now go hang yourself.
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*/
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#include "namespace.h"
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#include "reentrant.h"
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#include <sys/types.h>
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#include <sys/poll.h>
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#include <sys/syslog.h>
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#include <sys/socket.h>
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#include <sys/tree.h>
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#include <sys/un.h>
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#include <sys/uio.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <netdb.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <rpc/rpc.h>
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#include <rpc/rpcsec_gss.h>
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#include "un-namespace.h"
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#include "rpc_com.h"
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#include "mt_misc.h"
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#define MCALL_MSG_SIZE 24
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struct cmessage {
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struct cmsghdr cmsg;
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struct cmsgcred cmcred;
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};
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static enum clnt_stat clnt_vc_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
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xdrproc_t, void *, struct timeval);
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static void clnt_vc_geterr(CLIENT *, struct rpc_err *);
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static bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *);
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static void clnt_vc_abort(CLIENT *);
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static bool_t clnt_vc_control(CLIENT *, u_int, void *);
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static void clnt_vc_destroy(CLIENT *);
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static struct clnt_ops *clnt_vc_ops(void);
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static bool_t time_not_ok(struct timeval *);
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static int read_vc(void *, void *, int);
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static int write_vc(void *, void *, int);
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static int __msgwrite(int, void *, size_t);
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static int __msgread(int, void *, size_t);
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struct ct_data {
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int ct_fd; /* connection's fd */
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bool_t ct_closeit; /* close it on destroy */
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struct timeval ct_wait; /* wait interval in milliseconds */
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bool_t ct_waitset; /* wait set by clnt_control? */
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struct netbuf ct_addr; /* remote addr */
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struct rpc_err ct_error;
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union {
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char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
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u_int32_t ct_mcalli;
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} ct_u;
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u_int ct_mpos; /* pos after marshal */
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XDR ct_xdrs; /* XDR stream */
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};
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/*
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* This machinery implements per-fd locks for MT-safety. It is not
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* sufficient to do per-CLIENT handle locks for MT-safety because a
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* user may create more than one CLIENT handle with the same fd behind
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* it. Therefore, we allocate an associative array of flags and condition
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* variables (vc_fd). The flags and the array are protected by the
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* clnt_fd_lock mutex. vc_fd_lock[fd] == 1 => a call is active on some
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* CLIENT handle created for that fd. The current implementation holds
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* locks across the entire RPC and reply. Yes, this is silly, and as soon
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* as this code is proven to work, this should be the first thing fixed.
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* One step at a time.
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*/
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struct vc_fd {
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RB_ENTRY(vc_fd) vc_link;
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int fd;
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mutex_t mtx;
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};
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static inline int
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cmp_vc_fd(struct vc_fd *a, struct vc_fd *b)
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{
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if (a->fd > b->fd) {
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return (1);
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} else if (a->fd < b->fd) {
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return (-1);
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} else {
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return (0);
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}
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}
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RB_HEAD(vc_fd_list, vc_fd);
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RB_PROTOTYPE(vc_fd_list, vc_fd, vc_link, cmp_vc_fd);
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RB_GENERATE(vc_fd_list, vc_fd, vc_link, cmp_vc_fd);
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struct vc_fd_list vc_fd_head = RB_INITIALIZER(&vc_fd_head);
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/*
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* Find the lock structure for the given file descriptor, or initialize it if
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* it does not already exist. The clnt_fd_lock mutex must be held.
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*/
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static struct vc_fd *
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vc_fd_find(int fd)
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{
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struct vc_fd key, *elem;
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key.fd = fd;
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elem = RB_FIND(vc_fd_list, &vc_fd_head, &key);
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if (elem == NULL) {
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elem = calloc(1, sizeof(*elem));
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elem->fd = fd;
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mutex_init(&elem->mtx, NULL);
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RB_INSERT(vc_fd_list, &vc_fd_head, elem);
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}
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return (elem);
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}
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static void
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release_fd_lock(struct vc_fd *elem, sigset_t mask)
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{
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mutex_unlock(&elem->mtx);
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thr_sigsetmask(SIG_SETMASK, &mask, NULL);
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}
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static const char clnt_vc_errstr[] = "%s : %s";
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static const char clnt_vc_str[] = "clnt_vc_create";
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static const char __no_mem_str[] = "out of memory";
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/*
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* Create a client handle for a connection.
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* Default options are set, which the user can change using clnt_control()'s.
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* The rpc/vc package does buffering similar to stdio, so the client
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* must pick send and receive buffer sizes, 0 => use the default.
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* NB: fd is copied into a private area.
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* NB: The rpch->cl_auth is set null authentication. Caller may wish to
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* set this something more useful.
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*
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* fd should be an open socket
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*
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* fd - open file descriptor
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* raddr - servers address
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* prog - program number
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* vers - version number
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* sendsz - buffer send size
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* recvsz - buffer recv size
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*/
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CLIENT *
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clnt_vc_create(int fd, const struct netbuf *raddr, const rpcprog_t prog,
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const rpcvers_t vers, u_int sendsz, u_int recvsz)
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{
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CLIENT *cl; /* client handle */
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struct ct_data *ct = NULL; /* client handle */
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struct timeval now;
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struct rpc_msg call_msg;
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static u_int32_t disrupt;
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struct sockaddr_storage ss;
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socklen_t slen;
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struct __rpc_sockinfo si;
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if (disrupt == 0)
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disrupt = (u_int32_t)(long)raddr;
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cl = (CLIENT *)mem_alloc(sizeof (*cl));
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ct = (struct ct_data *)mem_alloc(sizeof (*ct));
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if ((cl == (CLIENT *)NULL) || (ct == (struct ct_data *)NULL)) {
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(void) syslog(LOG_ERR, clnt_vc_errstr,
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clnt_vc_str, __no_mem_str);
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = errno;
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goto err;
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}
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ct->ct_addr.buf = NULL;
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/*
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* XXX - fvdl connecting while holding a mutex?
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*/
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slen = sizeof ss;
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if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
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if (errno != ENOTCONN) {
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = errno;
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mutex_unlock(&clnt_fd_lock);
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goto err;
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}
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if (_connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = errno;
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mutex_unlock(&clnt_fd_lock);
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goto err;
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}
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}
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mutex_unlock(&clnt_fd_lock);
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if (!__rpc_fd2sockinfo(fd, &si))
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goto err;
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ct->ct_closeit = FALSE;
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/*
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* Set up private data struct
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*/
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ct->ct_fd = fd;
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ct->ct_wait.tv_usec = 0;
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ct->ct_waitset = FALSE;
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ct->ct_addr.buf = malloc(raddr->maxlen);
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if (ct->ct_addr.buf == NULL)
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goto err;
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memcpy(ct->ct_addr.buf, raddr->buf, raddr->len);
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ct->ct_addr.len = raddr->len;
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ct->ct_addr.maxlen = raddr->maxlen;
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/*
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* Initialize call message
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*/
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(void)gettimeofday(&now, NULL);
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call_msg.rm_xid = ((u_int32_t)++disrupt) ^ __RPC_GETXID(&now);
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call_msg.rm_direction = CALL;
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call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
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call_msg.rm_call.cb_prog = (u_int32_t)prog;
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call_msg.rm_call.cb_vers = (u_int32_t)vers;
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/*
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* pre-serialize the static part of the call msg and stash it away
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*/
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xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE,
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XDR_ENCODE);
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if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
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if (ct->ct_closeit) {
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(void)_close(fd);
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}
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goto err;
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}
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ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs));
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XDR_DESTROY(&(ct->ct_xdrs));
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assert(ct->ct_mpos + sizeof(uint32_t) <= MCALL_MSG_SIZE);
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/*
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* Create a client handle which uses xdrrec for serialization
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* and authnone for authentication.
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*/
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cl->cl_ops = clnt_vc_ops();
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cl->cl_private = ct;
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cl->cl_auth = authnone_create();
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sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz);
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recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz);
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xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
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cl->cl_private, read_vc, write_vc);
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return (cl);
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err:
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if (ct) {
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if (ct->ct_addr.len)
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mem_free(ct->ct_addr.buf, ct->ct_addr.len);
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mem_free(ct, sizeof (struct ct_data));
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}
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if (cl)
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mem_free(cl, sizeof (CLIENT));
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return ((CLIENT *)NULL);
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}
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static enum clnt_stat
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clnt_vc_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xdr_args, void *args_ptr,
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xdrproc_t xdr_results, void *results_ptr, struct timeval timeout)
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{
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struct ct_data *ct = (struct ct_data *) cl->cl_private;
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XDR *xdrs = &(ct->ct_xdrs);
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struct rpc_msg reply_msg;
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struct vc_fd *elem;
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u_int32_t x_id;
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u_int32_t *msg_x_id = &ct->ct_u.ct_mcalli; /* yuk */
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bool_t shipnow;
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int refreshes = 2;
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sigset_t mask, newmask;
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bool_t reply_stat;
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assert(cl != NULL);
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sigfillset(&newmask);
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thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
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mutex_lock(&clnt_fd_lock);
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elem = vc_fd_find(ct->ct_fd);
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mutex_unlock(&clnt_fd_lock);
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mutex_lock(&elem->mtx);
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if (!ct->ct_waitset) {
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/* If time is not within limits, we ignore it. */
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if (time_not_ok(&timeout) == FALSE)
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ct->ct_wait = timeout;
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}
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shipnow =
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(xdr_results == NULL && timeout.tv_sec == 0
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&& timeout.tv_usec == 0) ? FALSE : TRUE;
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call_again:
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xdrs->x_op = XDR_ENCODE;
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ct->ct_error.re_status = RPC_SUCCESS;
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x_id = ntohl(--(*msg_x_id));
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if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) {
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if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) ||
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(! XDR_PUTINT32(xdrs, &proc)) ||
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(! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
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(! (*xdr_args)(xdrs, args_ptr))) {
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if (ct->ct_error.re_status == RPC_SUCCESS)
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ct->ct_error.re_status = RPC_CANTENCODEARGS;
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(void)xdrrec_endofrecord(xdrs, TRUE);
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release_fd_lock(elem, mask);
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return (ct->ct_error.re_status);
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}
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} else {
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*(uint32_t *) &ct->ct_u.ct_mcallc[ct->ct_mpos] = htonl(proc);
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if (! __rpc_gss_wrap(cl->cl_auth, ct->ct_u.ct_mcallc,
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ct->ct_mpos + sizeof(uint32_t),
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xdrs, xdr_args, args_ptr)) {
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if (ct->ct_error.re_status == RPC_SUCCESS)
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ct->ct_error.re_status = RPC_CANTENCODEARGS;
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(void)xdrrec_endofrecord(xdrs, TRUE);
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release_fd_lock(elem, mask);
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return (ct->ct_error.re_status);
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}
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}
|
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if (! xdrrec_endofrecord(xdrs, shipnow)) {
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|
release_fd_lock(elem, mask);
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return (ct->ct_error.re_status = RPC_CANTSEND);
|
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}
|
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if (! shipnow) {
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release_fd_lock(elem, mask);
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return (RPC_SUCCESS);
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}
|
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/*
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* Hack to provide rpc-based message passing
|
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*/
|
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if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
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release_fd_lock(elem, mask);
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return(ct->ct_error.re_status = RPC_TIMEDOUT);
|
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}
|
|
|
|
|
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/*
|
|
* Keep receiving until we get a valid transaction id
|
|
*/
|
|
xdrs->x_op = XDR_DECODE;
|
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while (TRUE) {
|
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reply_msg.acpted_rply.ar_verf = _null_auth;
|
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reply_msg.acpted_rply.ar_results.where = NULL;
|
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reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
|
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if (! xdrrec_skiprecord(xdrs)) {
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release_fd_lock(elem, mask);
|
|
return (ct->ct_error.re_status);
|
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}
|
|
/* now decode and validate the response header */
|
|
if (! xdr_replymsg(xdrs, &reply_msg)) {
|
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if (ct->ct_error.re_status == RPC_SUCCESS)
|
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continue;
|
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release_fd_lock(elem, mask);
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return (ct->ct_error.re_status);
|
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}
|
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if (reply_msg.rm_xid == x_id)
|
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break;
|
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}
|
|
|
|
/*
|
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* process header
|
|
*/
|
|
_seterr_reply(&reply_msg, &(ct->ct_error));
|
|
if (ct->ct_error.re_status == RPC_SUCCESS) {
|
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if (! AUTH_VALIDATE(cl->cl_auth,
|
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&reply_msg.acpted_rply.ar_verf)) {
|
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ct->ct_error.re_status = RPC_AUTHERROR;
|
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ct->ct_error.re_why = AUTH_INVALIDRESP;
|
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} else {
|
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if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) {
|
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reply_stat = (*xdr_results)(xdrs, results_ptr);
|
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} else {
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reply_stat = __rpc_gss_unwrap(cl->cl_auth,
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xdrs, xdr_results, results_ptr);
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}
|
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if (! reply_stat) {
|
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if (ct->ct_error.re_status == RPC_SUCCESS)
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ct->ct_error.re_status =
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RPC_CANTDECODERES;
|
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}
|
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}
|
|
/* free verifier ... */
|
|
if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
|
|
xdrs->x_op = XDR_FREE;
|
|
(void)xdr_opaque_auth(xdrs,
|
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&(reply_msg.acpted_rply.ar_verf));
|
|
}
|
|
} /* end successful completion */
|
|
else {
|
|
/* maybe our credentials need to be refreshed ... */
|
|
if (refreshes-- && AUTH_REFRESH(cl->cl_auth, &reply_msg))
|
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goto call_again;
|
|
} /* end of unsuccessful completion */
|
|
release_fd_lock(elem, mask);
|
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return (ct->ct_error.re_status);
|
|
}
|
|
|
|
static void
|
|
clnt_vc_geterr(CLIENT *cl, struct rpc_err *errp)
|
|
{
|
|
struct ct_data *ct;
|
|
|
|
assert(cl != NULL);
|
|
assert(errp != NULL);
|
|
|
|
ct = (struct ct_data *) cl->cl_private;
|
|
*errp = ct->ct_error;
|
|
}
|
|
|
|
static bool_t
|
|
clnt_vc_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr)
|
|
{
|
|
struct ct_data *ct;
|
|
struct vc_fd *elem;
|
|
XDR *xdrs;
|
|
bool_t dummy;
|
|
sigset_t mask;
|
|
sigset_t newmask;
|
|
|
|
assert(cl != NULL);
|
|
|
|
ct = (struct ct_data *)cl->cl_private;
|
|
xdrs = &(ct->ct_xdrs);
|
|
|
|
sigfillset(&newmask);
|
|
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
|
|
mutex_lock(&clnt_fd_lock);
|
|
elem = vc_fd_find(ct->ct_fd);
|
|
mutex_lock(&elem->mtx);
|
|
xdrs->x_op = XDR_FREE;
|
|
dummy = (*xdr_res)(xdrs, res_ptr);
|
|
|
|
mutex_unlock(&clnt_fd_lock);
|
|
release_fd_lock(elem, mask);
|
|
return dummy;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
clnt_vc_abort(CLIENT *cl)
|
|
{
|
|
}
|
|
|
|
static __inline void
|
|
htonlp(void *dst, const void *src, uint32_t incr)
|
|
{
|
|
/* We are aligned, so we think */
|
|
*(uint32_t *)dst = htonl(*(const uint32_t *)src + incr);
|
|
}
|
|
|
|
static __inline void
|
|
ntohlp(void *dst, const void *src)
|
|
{
|
|
/* We are aligned, so we think */
|
|
*(uint32_t *)dst = htonl(*(const uint32_t *)src);
|
|
}
|
|
|
|
static bool_t
|
|
clnt_vc_control(CLIENT *cl, u_int request, void *info)
|
|
{
|
|
struct ct_data *ct;
|
|
struct vc_fd *elem;
|
|
void *infop = info;
|
|
sigset_t mask;
|
|
sigset_t newmask;
|
|
|
|
assert(cl != NULL);
|
|
|
|
ct = (struct ct_data *)cl->cl_private;
|
|
|
|
sigfillset(&newmask);
|
|
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
|
|
mutex_lock(&clnt_fd_lock);
|
|
elem = vc_fd_find(ct->ct_fd);
|
|
mutex_unlock(&clnt_fd_lock);
|
|
mutex_lock(&elem->mtx);
|
|
|
|
switch (request) {
|
|
case CLSET_FD_CLOSE:
|
|
ct->ct_closeit = TRUE;
|
|
release_fd_lock(elem, mask);
|
|
return (TRUE);
|
|
case CLSET_FD_NCLOSE:
|
|
ct->ct_closeit = FALSE;
|
|
release_fd_lock(elem, mask);
|
|
return (TRUE);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* for other requests which use info */
|
|
if (info == NULL) {
|
|
release_fd_lock(elem, mask);
|
|
return (FALSE);
|
|
}
|
|
switch (request) {
|
|
case CLSET_TIMEOUT:
|
|
if (time_not_ok((struct timeval *)info)) {
|
|
release_fd_lock(elem, mask);
|
|
return (FALSE);
|
|
}
|
|
ct->ct_wait = *(struct timeval *)infop;
|
|
ct->ct_waitset = TRUE;
|
|
break;
|
|
case CLGET_TIMEOUT:
|
|
*(struct timeval *)infop = ct->ct_wait;
|
|
break;
|
|
case CLGET_SERVER_ADDR:
|
|
(void) memcpy(info, ct->ct_addr.buf, (size_t)ct->ct_addr.len);
|
|
break;
|
|
case CLGET_FD:
|
|
*(int *)info = ct->ct_fd;
|
|
break;
|
|
case CLGET_SVC_ADDR:
|
|
/* The caller should not free this memory area */
|
|
*(struct netbuf *)info = ct->ct_addr;
|
|
break;
|
|
case CLSET_SVC_ADDR: /* set to new address */
|
|
release_fd_lock(elem, mask);
|
|
return (FALSE);
|
|
case CLGET_XID:
|
|
/*
|
|
* use the knowledge that xid is the
|
|
* first element in the call structure
|
|
* This will get the xid of the PREVIOUS call
|
|
*/
|
|
ntohlp(info, &ct->ct_u.ct_mcalli);
|
|
break;
|
|
case CLSET_XID:
|
|
/* This will set the xid of the NEXT call */
|
|
/* increment by 1 as clnt_vc_call() decrements once */
|
|
htonlp(&ct->ct_u.ct_mcalli, info, 1);
|
|
break;
|
|
case CLGET_VERS:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the version number field is the fifth field from the
|
|
* beginning of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
ntohlp(info, ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT);
|
|
break;
|
|
|
|
case CLSET_VERS:
|
|
htonlp(ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT, info, 0);
|
|
break;
|
|
|
|
case CLGET_PROG:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the program number field is the fourth field from the
|
|
* beginning of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
ntohlp(info, ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT);
|
|
break;
|
|
|
|
case CLSET_PROG:
|
|
htonlp(ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT, info, 0);
|
|
break;
|
|
|
|
default:
|
|
release_fd_lock(elem, mask);
|
|
return (FALSE);
|
|
}
|
|
release_fd_lock(elem, mask);
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
static void
|
|
clnt_vc_destroy(CLIENT *cl)
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) cl->cl_private;
|
|
struct vc_fd *elem;
|
|
int ct_fd = ct->ct_fd;
|
|
sigset_t mask;
|
|
sigset_t newmask;
|
|
|
|
assert(cl != NULL);
|
|
|
|
ct = (struct ct_data *) cl->cl_private;
|
|
|
|
sigfillset(&newmask);
|
|
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
|
|
mutex_lock(&clnt_fd_lock);
|
|
elem = vc_fd_find(ct_fd);
|
|
mutex_lock(&elem->mtx);
|
|
if (ct->ct_closeit && ct->ct_fd != -1) {
|
|
(void)_close(ct->ct_fd);
|
|
}
|
|
XDR_DESTROY(&(ct->ct_xdrs));
|
|
free(ct->ct_addr.buf);
|
|
mem_free(ct, sizeof(struct ct_data));
|
|
if (cl->cl_netid && cl->cl_netid[0])
|
|
mem_free(cl->cl_netid, strlen(cl->cl_netid) +1);
|
|
if (cl->cl_tp && cl->cl_tp[0])
|
|
mem_free(cl->cl_tp, strlen(cl->cl_tp) +1);
|
|
mem_free(cl, sizeof(CLIENT));
|
|
mutex_unlock(&clnt_fd_lock);
|
|
release_fd_lock(elem, mask);
|
|
}
|
|
|
|
/*
|
|
* Interface between xdr serializer and tcp connection.
|
|
* Behaves like the system calls, read & write, but keeps some error state
|
|
* around for the rpc level.
|
|
*/
|
|
static int
|
|
read_vc(void *ctp, void *buf, int len)
|
|
{
|
|
struct sockaddr sa;
|
|
socklen_t sal;
|
|
struct ct_data *ct = (struct ct_data *)ctp;
|
|
struct pollfd fd;
|
|
int milliseconds = (int)((ct->ct_wait.tv_sec * 1000) +
|
|
(ct->ct_wait.tv_usec / 1000));
|
|
|
|
if (len == 0)
|
|
return (0);
|
|
fd.fd = ct->ct_fd;
|
|
fd.events = POLLIN;
|
|
for (;;) {
|
|
switch (_poll(&fd, 1, milliseconds)) {
|
|
case 0:
|
|
ct->ct_error.re_status = RPC_TIMEDOUT;
|
|
return (-1);
|
|
|
|
case -1:
|
|
if (errno == EINTR)
|
|
continue;
|
|
ct->ct_error.re_status = RPC_CANTRECV;
|
|
ct->ct_error.re_errno = errno;
|
|
return (-1);
|
|
}
|
|
break;
|
|
}
|
|
|
|
sal = sizeof(sa);
|
|
if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) &&
|
|
(sa.sa_family == AF_LOCAL)) {
|
|
len = __msgread(ct->ct_fd, buf, (size_t)len);
|
|
} else {
|
|
len = _read(ct->ct_fd, buf, (size_t)len);
|
|
}
|
|
|
|
switch (len) {
|
|
case 0:
|
|
/* premature eof */
|
|
ct->ct_error.re_errno = ECONNRESET;
|
|
ct->ct_error.re_status = RPC_CANTRECV;
|
|
len = -1; /* it's really an error */
|
|
break;
|
|
|
|
case -1:
|
|
ct->ct_error.re_errno = errno;
|
|
ct->ct_error.re_status = RPC_CANTRECV;
|
|
break;
|
|
}
|
|
return (len);
|
|
}
|
|
|
|
static int
|
|
write_vc(void *ctp, void *buf, int len)
|
|
{
|
|
struct sockaddr sa;
|
|
socklen_t sal;
|
|
struct ct_data *ct = (struct ct_data *)ctp;
|
|
int i, cnt;
|
|
|
|
sal = sizeof(sa);
|
|
if ((_getpeername(ct->ct_fd, &sa, &sal) == 0) &&
|
|
(sa.sa_family == AF_LOCAL)) {
|
|
for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
|
|
if ((i = __msgwrite(ct->ct_fd, buf,
|
|
(size_t)cnt)) == -1) {
|
|
ct->ct_error.re_errno = errno;
|
|
ct->ct_error.re_status = RPC_CANTSEND;
|
|
return (-1);
|
|
}
|
|
}
|
|
} else {
|
|
for (cnt = len; cnt > 0; cnt -= i, buf = (char *)buf + i) {
|
|
if ((i = _write(ct->ct_fd, buf, (size_t)cnt)) == -1) {
|
|
ct->ct_error.re_errno = errno;
|
|
ct->ct_error.re_status = RPC_CANTSEND;
|
|
return (-1);
|
|
}
|
|
}
|
|
}
|
|
return (len);
|
|
}
|
|
|
|
static struct clnt_ops *
|
|
clnt_vc_ops(void)
|
|
{
|
|
static struct clnt_ops ops;
|
|
sigset_t mask, newmask;
|
|
|
|
/* VARIABLES PROTECTED BY ops_lock: ops */
|
|
|
|
sigfillset(&newmask);
|
|
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
|
|
mutex_lock(&ops_lock);
|
|
if (ops.cl_call == NULL) {
|
|
ops.cl_call = clnt_vc_call;
|
|
ops.cl_abort = clnt_vc_abort;
|
|
ops.cl_geterr = clnt_vc_geterr;
|
|
ops.cl_freeres = clnt_vc_freeres;
|
|
ops.cl_destroy = clnt_vc_destroy;
|
|
ops.cl_control = clnt_vc_control;
|
|
}
|
|
mutex_unlock(&ops_lock);
|
|
thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
|
|
return (&ops);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the time is not garbage. -1 value is disallowed.
|
|
* Note this is different from time_not_ok in clnt_dg.c
|
|
*/
|
|
static bool_t
|
|
time_not_ok(struct timeval *t)
|
|
{
|
|
return (t->tv_sec <= -1 || t->tv_sec > 100000000 ||
|
|
t->tv_usec <= -1 || t->tv_usec > 1000000);
|
|
}
|
|
|
|
static int
|
|
__msgread(int sock, void *buf, size_t cnt)
|
|
{
|
|
struct iovec iov[1];
|
|
struct msghdr msg;
|
|
union {
|
|
struct cmsghdr cmsg;
|
|
char control[CMSG_SPACE(sizeof(struct cmsgcred))];
|
|
} cm;
|
|
|
|
bzero((char *)&cm, sizeof(cm));
|
|
iov[0].iov_base = buf;
|
|
iov[0].iov_len = cnt;
|
|
|
|
msg.msg_iov = iov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_name = NULL;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_control = (caddr_t)&cm;
|
|
msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
|
|
msg.msg_flags = 0;
|
|
|
|
return(_recvmsg(sock, &msg, 0));
|
|
}
|
|
|
|
static int
|
|
__msgwrite(int sock, void *buf, size_t cnt)
|
|
{
|
|
struct iovec iov[1];
|
|
struct msghdr msg;
|
|
union {
|
|
struct cmsghdr cmsg;
|
|
char control[CMSG_SPACE(sizeof(struct cmsgcred))];
|
|
} cm;
|
|
|
|
bzero((char *)&cm, sizeof(cm));
|
|
iov[0].iov_base = buf;
|
|
iov[0].iov_len = cnt;
|
|
|
|
cm.cmsg.cmsg_type = SCM_CREDS;
|
|
cm.cmsg.cmsg_level = SOL_SOCKET;
|
|
cm.cmsg.cmsg_len = CMSG_LEN(sizeof(struct cmsgcred));
|
|
|
|
msg.msg_iov = iov;
|
|
msg.msg_iovlen = 1;
|
|
msg.msg_name = NULL;
|
|
msg.msg_namelen = 0;
|
|
msg.msg_control = (caddr_t)&cm;
|
|
msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
|
|
msg.msg_flags = 0;
|
|
|
|
return(_sendmsg(sock, &msg, 0));
|
|
}
|