lib/libc/rpc/clnt_vc.c
C | 783 lines | 571 code | 78 blank | 134 comment | 97 complexity | b1359a57da779185e1d9f8b85d254302 MD5 | raw file
Possible License(s): MIT, WTFPL, AGPL-1.0, BSD-3-Clause, GPL-3.0, LGPL-2.0, JSON, 0BSD
- /* $NetBSD: clnt_vc.c,v 1.17 2010/12/08 02:06:38 joerg Exp $ */
- /*
- * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
- * unrestricted use provided that this legend is included on all tape
- * media and as a part of the software program in whole or part. Users
- * may copy or modify Sun RPC without charge, but are not authorized
- * to license or distribute it to anyone else except as part of a product or
- * program developed by the user.
- *
- * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
- * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
- *
- * Sun RPC is provided with no support and without any obligation on the
- * part of Sun Microsystems, Inc. to assist in its use, correction,
- * modification or enhancement.
- *
- * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
- * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
- * OR ANY PART THEREOF.
- *
- * In no event will Sun Microsystems, Inc. be liable for any lost revenue
- * or profits or other special, indirect and consequential damages, even if
- * Sun has been advised of the possibility of such damages.
- *
- * Sun Microsystems, Inc.
- * 2550 Garcia Avenue
- * Mountain View, California 94043
- */
- #include <sys/cdefs.h>
- #if defined(LIBC_SCCS) && !defined(lint)
- #if 0
- static char *sccsid = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro";
- static char *sccsid = "@(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC";
- static char sccsid[] = "@(#)clnt_vc.c 1.19 89/03/16 Copyr 1988 Sun Micro";
- #else
- __RCSID("$NetBSD: clnt_vc.c,v 1.17 2010/12/08 02:06:38 joerg Exp $");
- #endif
- #endif
-
- /*
- * clnt_tcp.c, Implements a TCP/IP based, client side RPC.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- *
- * TCP based RPC supports 'batched calls'.
- * A sequence of calls may be batched-up in a send buffer. The rpc call
- * return immediately to the client even though the call was not necessarily
- * sent. The batching occurs if the results' xdr routine is NULL (0) AND
- * the rpc timeout value is zero (see clnt.h, rpc).
- *
- * Clients should NOT casually batch calls that in fact return results; that is,
- * the server side should be aware that a call is batched and not produce any
- * return message. Batched calls that produce many result messages can
- * deadlock (netlock) the client and the server....
- *
- * Now go hang yourself.
- */
- #include "namespace.h"
- #include "reentrant.h"
- #include <sys/types.h>
- #include <sys/poll.h>
- #include <sys/socket.h>
- #include <assert.h>
- #include <err.h>
- #include <errno.h>
- #include <netdb.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
- #include <signal.h>
- #include <rpc/rpc.h>
- #include "rpc_internal.h"
- #ifdef __weak_alias
- __weak_alias(clnt_vc_create,_clnt_vc_create)
- #endif
- #define MCALL_MSG_SIZE 24
- static enum clnt_stat clnt_vc_call __P((CLIENT *, rpcproc_t, xdrproc_t,
- const char *, xdrproc_t, caddr_t, struct timeval));
- static void clnt_vc_geterr __P((CLIENT *, struct rpc_err *));
- static bool_t clnt_vc_freeres __P((CLIENT *, xdrproc_t, caddr_t));
- static void clnt_vc_abort __P((CLIENT *));
- static bool_t clnt_vc_control __P((CLIENT *, u_int, char *));
- static void clnt_vc_destroy __P((CLIENT *));
- static struct clnt_ops *clnt_vc_ops __P((void));
- static bool_t time_not_ok __P((struct timeval *));
- static int read_vc __P((caddr_t, caddr_t, int));
- static int write_vc __P((caddr_t, caddr_t, int));
- struct ct_data {
- int ct_fd;
- bool_t ct_closeit;
- struct timeval ct_wait;
- bool_t ct_waitset; /* wait set by clnt_control? */
- struct netbuf ct_addr;
- struct rpc_err ct_error;
- union {
- char ct_mcallc[MCALL_MSG_SIZE]; /* marshalled callmsg */
- u_int32_t ct_mcalli;
- } ct_u;
- u_int ct_mpos; /* pos after marshal */
- XDR ct_xdrs;
- };
- /*
- * This machinery implements per-fd locks for MT-safety. It is not
- * sufficient to do per-CLIENT handle locks for MT-safety because a
- * user may create more than one CLIENT handle with the same fd behind
- * it. Therfore, we allocate an array of flags (vc_fd_locks), protected
- * by the clnt_fd_lock mutex, and an array (vc_cv) of condition variables
- * similarly protected. Vc_fd_lock[fd] == 1 => a call is activte on some
- * CLIENT handle created for that fd.
- * The current implementation holds locks across the entire RPC and reply.
- * Yes, this is silly, and as soon as this code is proven to work, this
- * should be the first thing fixed. One step at a time.
- */
- #ifdef _REENTRANT
- static int *vc_fd_locks;
- #define __rpc_lock_value __isthreaded;
- extern mutex_t clnt_fd_lock;
- static cond_t *vc_cv;
- #define release_fd_lock(fd, mask) { \
- mutex_lock(&clnt_fd_lock); \
- vc_fd_locks[fd] = 0; \
- mutex_unlock(&clnt_fd_lock); \
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \
- cond_signal(&vc_cv[fd]); \
- }
- #else
- #define release_fd_lock(fd,mask)
- #define __rpc_lock_value 0
- #endif
- /*
- * Create a client handle for a connection.
- * Default options are set, which the user can change using clnt_control()'s.
- * The rpc/vc package does buffering similar to stdio, so the client
- * must pick send and receive buffer sizes, 0 => use the default.
- * NB: fd is copied into a private area.
- * NB: The rpch->cl_auth is set null authentication. Caller may wish to
- * set this something more useful.
- *
- * fd should be an open socket
- */
- CLIENT *
- clnt_vc_create(fd, raddr, prog, vers, sendsz, recvsz)
- int fd;
- const struct netbuf *raddr;
- rpcprog_t prog;
- rpcvers_t vers;
- u_int sendsz;
- u_int recvsz;
- {
- CLIENT *h;
- struct ct_data *ct = NULL;
- struct rpc_msg call_msg;
- #ifdef _REENTRANT
- sigset_t mask;
- #endif
- sigset_t newmask;
- struct sockaddr_storage ss;
- socklen_t slen;
- struct __rpc_sockinfo si;
- _DIAGASSERT(raddr != NULL);
- h = mem_alloc(sizeof(*h));
- if (h == NULL) {
- warnx("clnt_vc_create: out of memory");
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- goto fooy;
- }
- ct = mem_alloc(sizeof(*ct));
- if (ct == NULL) {
- warnx("clnt_vc_create: out of memory");
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- goto fooy;
- }
- sigfillset(&newmask);
- thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
- #ifdef _REENTRANT
- mutex_lock(&clnt_fd_lock);
- if (vc_fd_locks == NULL) {
- size_t cv_allocsz, fd_allocsz;
- int dtbsize = __rpc_dtbsize();
- fd_allocsz = dtbsize * sizeof (int);
- vc_fd_locks = mem_alloc(fd_allocsz);
- if (vc_fd_locks == NULL) {
- mutex_unlock(&clnt_fd_lock);
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
- goto fooy;
- } else
- memset(vc_fd_locks, '\0', fd_allocsz);
- _DIAGASSERT(vc_cv == NULL);
- cv_allocsz = dtbsize * sizeof (cond_t);
- vc_cv = mem_alloc(cv_allocsz);
- if (vc_cv == NULL) {
- mem_free(vc_fd_locks, fd_allocsz);
- vc_fd_locks = NULL;
- mutex_unlock(&clnt_fd_lock);
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
- goto fooy;
- } else {
- int i;
- for (i = 0; i < dtbsize; i++)
- cond_init(&vc_cv[i], 0, (void *) 0);
- }
- } else
- _DIAGASSERT(vc_cv != NULL);
- #endif
- /*
- * XXX - fvdl connecting while holding a mutex?
- */
- slen = sizeof ss;
- if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
- if (errno != ENOTCONN) {
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- mutex_unlock(&clnt_fd_lock);
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
- goto fooy;
- }
- if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){
- rpc_createerr.cf_stat = RPC_SYSTEMERROR;
- rpc_createerr.cf_error.re_errno = errno;
- mutex_unlock(&clnt_fd_lock);
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
- goto fooy;
- }
- }
- mutex_unlock(&clnt_fd_lock);
- thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
- if (!__rpc_fd2sockinfo(fd, &si))
- goto fooy;
- ct->ct_closeit = FALSE;
- /*
- * Set up private data struct
- */
- ct->ct_fd = fd;
- ct->ct_wait.tv_usec = 0;
- ct->ct_waitset = FALSE;
- ct->ct_addr.buf = malloc((size_t)raddr->maxlen);
- if (ct->ct_addr.buf == NULL)
- goto fooy;
- memcpy(ct->ct_addr.buf, &raddr->buf, (size_t)raddr->len);
- ct->ct_addr.len = raddr->maxlen;
- ct->ct_addr.maxlen = raddr->maxlen;
- /*
- * Initialize call message
- */
- call_msg.rm_xid = __RPC_GETXID();
- call_msg.rm_direction = CALL;
- call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
- call_msg.rm_call.cb_prog = (u_int32_t)prog;
- call_msg.rm_call.cb_vers = (u_int32_t)vers;
- /*
- * pre-serialize the static part of the call msg and stash it away
- */
- xdrmem_create(&(ct->ct_xdrs), ct->ct_u.ct_mcallc, MCALL_MSG_SIZE,
- XDR_ENCODE);
- if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
- if (ct->ct_closeit) {
- (void)close(fd);
- }
- goto fooy;
- }
- ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs));
- XDR_DESTROY(&(ct->ct_xdrs));
- /*
- * Create a client handle which uses xdrrec for serialization
- * and authnone for authentication.
- */
- h->cl_ops = clnt_vc_ops();
- h->cl_private = ct;
- h->cl_auth = authnone_create();
- sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz);
- recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz);
- xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
- h->cl_private, read_vc, write_vc);
- return (h);
- fooy:
- /*
- * Something goofed, free stuff and barf
- */
- if (ct)
- mem_free(ct, sizeof(struct ct_data));
- if (h)
- mem_free(h, sizeof(CLIENT));
- return (NULL);
- }
- static enum clnt_stat
- clnt_vc_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout)
- CLIENT *h;
- rpcproc_t proc;
- xdrproc_t xdr_args;
- const char *args_ptr;
- xdrproc_t xdr_results;
- caddr_t results_ptr;
- struct timeval timeout;
- {
- struct ct_data *ct;
- XDR *xdrs;
- struct rpc_msg reply_msg;
- u_int32_t x_id;
- u_int32_t *msg_x_id;
- bool_t shipnow;
- int refreshes = 2;
- #ifdef _REENTRANT
- sigset_t mask, newmask;
- #endif
- _DIAGASSERT(h != NULL);
- ct = (struct ct_data *) h->cl_private;
- #ifdef _REENTRANT
- 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);
- vc_fd_locks[ct->ct_fd] = __rpc_lock_value;
- mutex_unlock(&clnt_fd_lock);
- #endif
- xdrs = &(ct->ct_xdrs);
- msg_x_id = &ct->ct_u.ct_mcalli;
- if (!ct->ct_waitset) {
- if (time_not_ok(&timeout) == FALSE)
- ct->ct_wait = timeout;
- }
- shipnow =
- (xdr_results == NULL && timeout.tv_sec == 0
- && timeout.tv_usec == 0) ? FALSE : TRUE;
- call_again:
- xdrs->x_op = XDR_ENCODE;
- ct->ct_error.re_status = RPC_SUCCESS;
- x_id = ntohl(--(*msg_x_id));
- if ((! XDR_PUTBYTES(xdrs, ct->ct_u.ct_mcallc, ct->ct_mpos)) ||
- (! XDR_PUTINT32(xdrs, (int32_t *)&proc)) ||
- (! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
- (! (*xdr_args)(xdrs, __UNCONST(args_ptr)))) {
- if (ct->ct_error.re_status == RPC_SUCCESS)
- ct->ct_error.re_status = RPC_CANTENCODEARGS;
- (void)xdrrec_endofrecord(xdrs, TRUE);
- release_fd_lock(ct->ct_fd, mask);
- return (ct->ct_error.re_status);
- }
- if (! xdrrec_endofrecord(xdrs, shipnow)) {
- release_fd_lock(ct->ct_fd, mask);
- return (ct->ct_error.re_status = RPC_CANTSEND);
- }
- if (! shipnow) {
- release_fd_lock(ct->ct_fd, mask);
- return (RPC_SUCCESS);
- }
- /*
- * Hack to provide rpc-based message passing
- */
- if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
- release_fd_lock(ct->ct_fd, mask);
- return(ct->ct_error.re_status = RPC_TIMEDOUT);
- }
- /*
- * Keep receiving until we get a valid transaction id
- */
- xdrs->x_op = XDR_DECODE;
- for (;;) {
- reply_msg.acpted_rply.ar_verf = _null_auth;
- reply_msg.acpted_rply.ar_results.where = NULL;
- reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
- if (! xdrrec_skiprecord(xdrs)) {
- release_fd_lock(ct->ct_fd, mask);
- return (ct->ct_error.re_status);
- }
- /* now decode and validate the response header */
- if (! xdr_replymsg(xdrs, &reply_msg)) {
- if (ct->ct_error.re_status == RPC_SUCCESS)
- continue;
- release_fd_lock(ct->ct_fd, mask);
- return (ct->ct_error.re_status);
- }
- if (reply_msg.rm_xid == x_id)
- break;
- }
- /*
- * process header
- */
- _seterr_reply(&reply_msg, &(ct->ct_error));
- if (ct->ct_error.re_status == RPC_SUCCESS) {
- if (! AUTH_VALIDATE(h->cl_auth,
- &reply_msg.acpted_rply.ar_verf)) {
- ct->ct_error.re_status = RPC_AUTHERROR;
- ct->ct_error.re_why = AUTH_INVALIDRESP;
- } else if (! (*xdr_results)(xdrs, results_ptr)) {
- if (ct->ct_error.re_status == RPC_SUCCESS)
- ct->ct_error.re_status = RPC_CANTDECODERES;
- }
- /* free verifier ... */
- if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
- xdrs->x_op = XDR_FREE;
- (void)xdr_opaque_auth(xdrs,
- &(reply_msg.acpted_rply.ar_verf));
- }
- } /* end successful completion */
- else {
- /* maybe our credentials need to be refreshed ... */
- if (refreshes-- && AUTH_REFRESH(h->cl_auth))
- goto call_again;
- } /* end of unsuccessful completion */
- release_fd_lock(ct->ct_fd, mask);
- return (ct->ct_error.re_status);
- }
- static void
- clnt_vc_geterr(h, errp)
- CLIENT *h;
- struct rpc_err *errp;
- {
- struct ct_data *ct;
- _DIAGASSERT(h != NULL);
- _DIAGASSERT(errp != NULL);
- ct = (struct ct_data *) h->cl_private;
- *errp = ct->ct_error;
- }
- static bool_t
- clnt_vc_freeres(cl, xdr_res, res_ptr)
- CLIENT *cl;
- xdrproc_t xdr_res;
- caddr_t res_ptr;
- {
- struct ct_data *ct;
- XDR *xdrs;
- bool_t dummy;
- #ifdef _REENTRANT
- sigset_t mask;
- #endif
- sigset_t newmask;
- _DIAGASSERT(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);
- #ifdef _REENTRANT
- while (vc_fd_locks[ct->ct_fd])
- cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock);
- #endif
- 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;
- char *info;
- {
- struct ct_data *ct;
- void *infop = info;
- #ifdef _REENTRANT
- sigset_t mask;
- #endif
- sigset_t newmask;
- _DIAGASSERT(cl != NULL);
- ct = (struct ct_data *)cl->cl_private;
- sigfillset(&newmask);
- thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
- mutex_lock(&clnt_fd_lock);
- #ifdef _REENTRANT
- while (vc_fd_locks[ct->ct_fd])
- cond_wait(&vc_cv[ct->ct_fd], &clnt_fd_lock);
- vc_fd_locks[ct->ct_fd] = __rpc_lock_value;
- #endif
- 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 *)(void *)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 *)(void *)info = ct->ct_fd;
- break;
- case CLGET_SVC_ADDR:
- /* The caller should not free this memory area */
- *(struct netbuf *)(void *)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 *)(void *)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 *)(void *)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 *)(void *)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 *)(void *)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 *)(void *)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 *)(void *)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;
- #ifdef _REENTRANT
- int ct_fd;
- sigset_t mask;
- #endif
- sigset_t newmask;
- _DIAGASSERT(cl != NULL);
- ct = (struct ct_data *) cl->cl_private;
- ct_fd = ct->ct_fd;
- sigfillset(&newmask);
- thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
- mutex_lock(&clnt_fd_lock);
- #ifdef _REENTRANT
- while (vc_fd_locks[ct_fd])
- cond_wait(&vc_cv[ct_fd], &clnt_fd_lock);
- #endif
- 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)
- caddr_t ctp;
- caddr_t buf;
- int len;
- {
- struct ct_data *ct = (struct ct_data *)(void *)ctp;
- struct pollfd fd;
- struct timespec ts;
- if (len == 0)
- return (0);
- TIMEVAL_TO_TIMESPEC(&ct->ct_wait, &ts);
- fd.fd = ct->ct_fd;
- fd.events = POLLIN;
- for (;;) {
- switch (pollts(&fd, 1, &ts, NULL)) {
- 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;
- }
- switch (len = read(ct->ct_fd, buf, (size_t)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)
- caddr_t ctp;
- caddr_t buf;
- int len;
- {
- struct ct_data *ct = (struct ct_data *)(void *)ctp;
- int i, cnt;
- 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;
- #ifdef _REENTRANT
- extern mutex_t ops_lock;
- sigset_t mask;
- #endif
- sigset_t 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;
- {
- _DIAGASSERT(t != NULL);
- return (t->tv_sec <= -1 || t->tv_sec > 100000000 ||
- t->tv_usec <= -1 || t->tv_usec > 1000000);
- }