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886ee6f6a5
fix it (make them non-const) and update the associated documentation. Submitted by: mbr
848 lines
22 KiB
C
848 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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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC";
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static char sccsid[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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/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 <stdio.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 "un-namespace.h"
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#include "rpc_com.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. Therfore, we allocate an array of flags (vc_fd_locks), protected
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* by the clnt_fd_lock mutex, and an array (vc_cv) of condition variables
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* similarly protected. Vc_fd_lock[fd] == 1 => a call is activte on some
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* CLIENT handle created for that fd.
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* The current implementation holds locks across the entire RPC and reply.
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* Yes, this is silly, and as soon as this code is proven to work, this
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* should be the first thing fixed. One step at a time.
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*/
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static int *vc_fd_locks;
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extern mutex_t clnt_fd_lock;
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static cond_t *vc_cv;
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#define release_fd_lock(fd, mask) { \
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mutex_lock(&clnt_fd_lock); \
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vc_fd_locks[fd] = 0; \
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mutex_unlock(&clnt_fd_lock); \
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thr_sigsetmask(SIG_SETMASK, &(mask), (sigset_t *) NULL); \
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cond_signal(&vc_cv[fd]); \
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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 clnt_read_vc_str[] = "read_vc";
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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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CLIENT *
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clnt_vc_create(fd, raddr, prog, vers, sendsz, recvsz)
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int fd; /* open file descriptor */
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const struct netbuf *raddr; /* servers address */
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const rpcprog_t prog; /* program number */
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const rpcvers_t vers; /* version number */
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u_int sendsz; /* buffer recv size */
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u_int recvsz; /* buffer send size */
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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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sigset_t mask;
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sigset_t newmask;
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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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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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if (vc_fd_locks == (int *) NULL) {
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int cv_allocsz, fd_allocsz;
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int dtbsize = __rpc_dtbsize();
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fd_allocsz = dtbsize * sizeof (int);
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vc_fd_locks = (int *) mem_alloc(fd_allocsz);
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if (vc_fd_locks == (int *) NULL) {
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mutex_unlock(&clnt_fd_lock);
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thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
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goto err;
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} else
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memset(vc_fd_locks, '\0', fd_allocsz);
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assert(vc_cv == (cond_t *) NULL);
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cv_allocsz = dtbsize * sizeof (cond_t);
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vc_cv = (cond_t *) mem_alloc(cv_allocsz);
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if (vc_cv == (cond_t *) NULL) {
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mem_free(vc_fd_locks, fd_allocsz);
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vc_fd_locks = (int *) NULL;
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mutex_unlock(&clnt_fd_lock);
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thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
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goto err;
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} else {
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int i;
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for (i = 0; i < dtbsize; i++)
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cond_init(&vc_cv[i], 0, (void *) 0);
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}
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} else
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assert(vc_cv != (cond_t *) 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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thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
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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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thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
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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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thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
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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->maxlen;
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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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/*
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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 (cl) {
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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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}
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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(cl, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout)
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CLIENT *cl;
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rpcproc_t proc;
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xdrproc_t xdr_args;
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void *args_ptr;
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xdrproc_t xdr_results;
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void *results_ptr;
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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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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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int rpc_lock_value;
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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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while (vc_fd_locks[ct->ct_fd])
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cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock);
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if (__isthreaded)
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rpc_lock_value = 1;
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else
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rpc_lock_value = 0;
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vc_fd_locks[ct->ct_fd] = rpc_lock_value;
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mutex_unlock(&clnt_fd_lock);
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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 ((! 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(ct->ct_fd, mask);
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return (ct->ct_error.re_status);
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}
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if (! xdrrec_endofrecord(xdrs, shipnow)) {
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release_fd_lock(ct->ct_fd, 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(ct->ct_fd, 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(ct->ct_fd, mask);
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return(ct->ct_error.re_status = RPC_TIMEDOUT);
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}
|
|
|
|
|
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/*
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* Keep receiving until we get a valid transaction id
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*/
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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(ct->ct_fd, mask);
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return (ct->ct_error.re_status);
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}
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/* now decode and validate the response header */
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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(ct->ct_fd, 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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|
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/*
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* process header
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|
*/
|
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_seterr_reply(&reply_msg, &(ct->ct_error));
|
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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 if (! (*xdr_results)(xdrs, results_ptr)) {
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if (ct->ct_error.re_status == RPC_SUCCESS)
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ct->ct_error.re_status = RPC_CANTDECODERES;
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}
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/* free verifier ... */
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if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
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xdrs->x_op = XDR_FREE;
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(void)xdr_opaque_auth(xdrs,
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&(reply_msg.acpted_rply.ar_verf));
|
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}
|
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} /* end successful completion */
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else {
|
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/* maybe our credentials need to be refreshed ... */
|
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if (refreshes-- && AUTH_REFRESH(cl->cl_auth, &reply_msg))
|
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goto call_again;
|
|
} /* end of unsuccessful completion */
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release_fd_lock(ct->ct_fd, mask);
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return (ct->ct_error.re_status);
|
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}
|
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|
|
static void
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clnt_vc_geterr(cl, errp)
|
|
CLIENT *cl;
|
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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(cl, xdr_res, res_ptr)
|
|
CLIENT *cl;
|
|
xdrproc_t xdr_res;
|
|
void *res_ptr;
|
|
{
|
|
struct ct_data *ct;
|
|
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);
|
|
while (vc_fd_locks[ct->ct_fd])
|
|
cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock);
|
|
xdrs->x_op = XDR_FREE;
|
|
dummy = (*xdr_res)(xdrs, res_ptr);
|
|
mutex_unlock(&clnt_fd_lock);
|
|
thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
|
|
cond_signal(&vc_cv[ct->ct_fd]);
|
|
|
|
return dummy;
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static void
|
|
clnt_vc_abort(cl)
|
|
CLIENT *cl;
|
|
{
|
|
}
|
|
|
|
static bool_t
|
|
clnt_vc_control(cl, request, info)
|
|
CLIENT *cl;
|
|
u_int request;
|
|
void *info;
|
|
{
|
|
struct ct_data *ct;
|
|
void *infop = info;
|
|
sigset_t mask;
|
|
sigset_t newmask;
|
|
int rpc_lock_value;
|
|
|
|
assert(cl != NULL);
|
|
|
|
ct = (struct ct_data *)cl->cl_private;
|
|
|
|
sigfillset(&newmask);
|
|
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
|
|
mutex_lock(&clnt_fd_lock);
|
|
while (vc_fd_locks[ct->ct_fd])
|
|
cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock);
|
|
if (__isthreaded)
|
|
rpc_lock_value = 1;
|
|
else
|
|
rpc_lock_value = 0;
|
|
vc_fd_locks[ct->ct_fd] = rpc_lock_value;
|
|
mutex_unlock(&clnt_fd_lock);
|
|
|
|
switch (request) {
|
|
case CLSET_FD_CLOSE:
|
|
ct->ct_closeit = TRUE;
|
|
release_fd_lock(ct->ct_fd, mask);
|
|
return (TRUE);
|
|
case CLSET_FD_NCLOSE:
|
|
ct->ct_closeit = FALSE;
|
|
release_fd_lock(ct->ct_fd, mask);
|
|
return (TRUE);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* for other requests which use info */
|
|
if (info == NULL) {
|
|
release_fd_lock(ct->ct_fd, mask);
|
|
return (FALSE);
|
|
}
|
|
switch (request) {
|
|
case CLSET_TIMEOUT:
|
|
if (time_not_ok((struct timeval *)info)) {
|
|
release_fd_lock(ct->ct_fd, 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(ct->ct_fd, 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
|
|
*/
|
|
*(u_int32_t *)info =
|
|
ntohl(*(u_int32_t *)(void *)&ct->ct_u.ct_mcalli);
|
|
break;
|
|
case CLSET_XID:
|
|
/* This will set the xid of the NEXT call */
|
|
*(u_int32_t *)(void *)&ct->ct_u.ct_mcalli =
|
|
htonl(*((u_int32_t *)info) + 1);
|
|
/* increment by 1 as clnt_vc_call() decrements once */
|
|
break;
|
|
case CLGET_VERS:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the version number field is the fifth field from the
|
|
* begining of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
*(u_int32_t *)info =
|
|
ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc +
|
|
4 * BYTES_PER_XDR_UNIT));
|
|
break;
|
|
|
|
case CLSET_VERS:
|
|
*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc +
|
|
4 * BYTES_PER_XDR_UNIT) =
|
|
htonl(*(u_int32_t *)info);
|
|
break;
|
|
|
|
case CLGET_PROG:
|
|
/*
|
|
* This RELIES on the information that, in the call body,
|
|
* the program number field is the fourth field from the
|
|
* begining of the RPC header. MUST be changed if the
|
|
* call_struct is changed
|
|
*/
|
|
*(u_int32_t *)info =
|
|
ntohl(*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc +
|
|
3 * BYTES_PER_XDR_UNIT));
|
|
break;
|
|
|
|
case CLSET_PROG:
|
|
*(u_int32_t *)(void *)(ct->ct_u.ct_mcallc +
|
|
3 * BYTES_PER_XDR_UNIT) =
|
|
htonl(*(u_int32_t *)info);
|
|
break;
|
|
|
|
default:
|
|
release_fd_lock(ct->ct_fd, mask);
|
|
return (FALSE);
|
|
}
|
|
release_fd_lock(ct->ct_fd, mask);
|
|
return (TRUE);
|
|
}
|
|
|
|
|
|
static void
|
|
clnt_vc_destroy(cl)
|
|
CLIENT *cl;
|
|
{
|
|
struct ct_data *ct = (struct ct_data *) cl->cl_private;
|
|
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);
|
|
while (vc_fd_locks[ct_fd])
|
|
cond_wait(&vc_cv[ct_fd], &clnt_fd_lock);
|
|
if (ct->ct_closeit && ct->ct_fd != -1) {
|
|
(void)_close(ct->ct_fd);
|
|
}
|
|
XDR_DESTROY(&(ct->ct_xdrs));
|
|
if (ct->ct_addr.buf)
|
|
free(ct->ct_addr.buf);
|
|
mem_free(ct, sizeof(struct ct_data));
|
|
mem_free(cl, sizeof(CLIENT));
|
|
mutex_unlock(&clnt_fd_lock);
|
|
thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
|
|
cond_signal(&vc_cv[ct_fd]);
|
|
}
|
|
|
|
/*
|
|
* 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(ctp, buf, len)
|
|
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(ctp, buf, len)
|
|
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 += 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 += 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()
|
|
{
|
|
static struct clnt_ops ops;
|
|
extern mutex_t ops_lock;
|
|
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(t)
|
|
struct timeval *t;
|
|
{
|
|
return (t->tv_sec <= -1 || t->tv_sec > 100000000 ||
|
|
t->tv_usec <= -1 || t->tv_usec > 1000000);
|
|
}
|
|
|
|
static int
|
|
__msgread(sock, buf, cnt)
|
|
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(sock, buf, cnt)
|
|
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));
|
|
}
|