/* * 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 * * @(#)clnt_dg.c 1.23 94/04/22 SMI; 1.19 89/03/16 Copyr 1988 Sun Micro * $NetBSD: clnt_dg.c,v 1.4 2000/07/14 08:40:41 fvdl Exp $ * $FreeBSD: src/lib/libc/rpc/clnt_dg.c,v 1.18 2006/02/27 22:10:58 deischen Exp $ */ /* * Copyright (c) 1986-1991 by Sun Microsystems Inc. */ /* * Implements a connectionless client side RPC. */ #include "namespace.h" #include "reentrant.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "un-namespace.h" #include "rpc_com.h" #include "mt_misc.h" #define RPC_MAX_BACKOFF 30 /* seconds */ static void clnt_dg_abort(CLIENT *); static enum clnt_stat clnt_dg_call(CLIENT *, rpcproc_t, xdrproc_t, void *, xdrproc_t, void *, struct timeval); static bool_t clnt_dg_control(CLIENT *, u_int, void *); static void clnt_dg_destroy(CLIENT *); static bool_t clnt_dg_freeres(CLIENT *, xdrproc_t, void *); static void clnt_dg_geterr(CLIENT *, struct rpc_err *); static struct clnt_ops *clnt_dg_ops(void); static bool_t time_not_ok(struct timeval *); /* * 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 (dg_fd_locks), protected * by the clnt_fd_lock mutex, and an array (dg_cv) of condition variables * similarly protected. Dg_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, * including retransmissions. 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. */ static int *dg_fd_locks; static cond_t *dg_cv; #define release_fd_lock(fd, mask) { \ mutex_lock(&clnt_fd_lock); \ dg_fd_locks[fd] = 0; \ mutex_unlock(&clnt_fd_lock); \ thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \ cond_signal(&dg_cv[fd]); \ } static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; /* VARIABLES PROTECTED BY clnt_fd_lock: dg_fd_locks, dg_cv */ /* * Private data kept per client handle */ struct cu_data { int cu_fd; /* connections fd */ bool_t cu_closeit; /* opened by library */ struct sockaddr_storage cu_raddr; /* remote address */ int cu_rlen; struct timeval cu_wait; /* retransmit interval */ struct timeval cu_total; /* total time for the call */ struct rpc_err cu_error; XDR cu_outxdrs; u_int cu_xdrpos; u_int cu_sendsz; /* send size */ char *cu_outbuf; u_int cu_recvsz; /* recv size */ int cu_async; int cu_connect; /* Use connect(). */ int cu_connected; /* Have done connect(). */ struct kevent cu_kin; int cu_kq; char cu_inbuf[1]; }; /* * Connection less client creation returns with client handle parameters. * Default options are set, which the user can change using clnt_control(). * fd should be open and bound. * NB: The rpch->cl_auth is initialized to null authentication. * Caller may wish to set this something more useful. * * sendsz and recvsz are the maximum allowable packet sizes that can be * sent and received. Normally they are the same, but they can be * changed to improve the program efficiency and buffer allocation. * If they are 0, use the transport default. * * If svcaddr is NULL, returns NULL. */ CLIENT * clnt_dg_create(int fd, /* open file descriptor */ const struct netbuf *svcaddr, /* servers address */ rpcprog_t program, /* program number */ rpcvers_t version, /* version number */ u_int sendsz, /* buffer recv size */ u_int recvsz) /* buffer send size */ { CLIENT *cl = NULL; /* client handle */ struct cu_data *cu = NULL; /* private data */ struct timeval now; struct rpc_msg call_msg; sigset_t mask; sigset_t newmask; struct __rpc_sockinfo si; int one = 1; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); if (dg_fd_locks == NULL) { int cv_allocsz; size_t fd_allocsz; int dtbsize = __rpc_dtbsize(); fd_allocsz = dtbsize * sizeof (int); dg_fd_locks = (int *) mem_alloc(fd_allocsz); if (dg_fd_locks == NULL) { mutex_unlock(&clnt_fd_lock); thr_sigsetmask(SIG_SETMASK, &(mask), NULL); goto err1; } else memset(dg_fd_locks, '\0', fd_allocsz); cv_allocsz = dtbsize * sizeof (cond_t); dg_cv = (cond_t *) mem_alloc(cv_allocsz); if (dg_cv == NULL) { mem_free(dg_fd_locks, fd_allocsz); dg_fd_locks = NULL; mutex_unlock(&clnt_fd_lock); thr_sigsetmask(SIG_SETMASK, &(mask), NULL); goto err1; } else { int i; for (i = 0; i < dtbsize; i++) cond_init(&dg_cv[i], 0, NULL); } } mutex_unlock(&clnt_fd_lock); thr_sigsetmask(SIG_SETMASK, &(mask), NULL); if (svcaddr == NULL) { rpc_createerr.cf_stat = RPC_UNKNOWNADDR; return (NULL); } if (!__rpc_fd2sockinfo(fd, &si)) { rpc_createerr.cf_stat = RPC_TLIERROR; rpc_createerr.cf_error.re_errno = 0; return (NULL); } /* * Find the receive and the send size */ 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); if ((sendsz == 0) || (recvsz == 0)) { rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ rpc_createerr.cf_error.re_errno = 0; return (NULL); } if ((cl = mem_alloc(sizeof (CLIENT))) == NULL) goto err1; /* * Should be multiple of 4 for XDR. */ sendsz = ((sendsz + 3) / 4) * 4; recvsz = ((recvsz + 3) / 4) * 4; cu = mem_alloc(sizeof (*cu) + sendsz + recvsz); if (cu == NULL) goto err1; memcpy(&cu->cu_raddr, svcaddr->buf, (size_t)svcaddr->len); cu->cu_rlen = svcaddr->len; cu->cu_outbuf = &cu->cu_inbuf[recvsz]; /* Other values can also be set through clnt_control() */ cu->cu_wait.tv_sec = 15; /* heuristically chosen */ cu->cu_wait.tv_usec = 0; cu->cu_total.tv_sec = -1; cu->cu_total.tv_usec = -1; cu->cu_sendsz = sendsz; cu->cu_recvsz = recvsz; cu->cu_async = FALSE; cu->cu_connect = FALSE; cu->cu_connected = FALSE; gettimeofday(&now, NULL); call_msg.rm_xid = __RPC_GETXID(&now); call_msg.rm_call.cb_prog = program; call_msg.rm_call.cb_vers = version; xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE); if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) { rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ rpc_createerr.cf_error.re_errno = 0; goto err2; } cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs)); /* XXX fvdl - do we still want this? */ #if 0 bindresvport_sa(fd, (struct sockaddr *)svcaddr->buf); #endif _ioctl(fd, FIONBIO, (char *)(void *)&one); /* * By default, closeit is always FALSE. It is users responsibility * to do a close on it, else the user may use clnt_control * to let clnt_destroy do it for him/her. */ cu->cu_closeit = FALSE; cu->cu_fd = fd; cl->cl_ops = clnt_dg_ops(); cl->cl_private = (caddr_t)(void *)cu; cl->cl_auth = authnone_create(); cl->cl_tp = NULL; cl->cl_netid = NULL; cu->cu_kq = -1; EV_SET(&cu->cu_kin, cu->cu_fd, EVFILT_READ, EV_ADD, 0, 0, 0); return (cl); err1: warnx(mem_err_clnt_dg); rpc_createerr.cf_stat = RPC_SYSTEMERROR; rpc_createerr.cf_error.re_errno = errno; err2: if (cl) { mem_free(cl, sizeof (CLIENT)); if (cu) mem_free(cu, sizeof (*cu) + sendsz + recvsz); } return (NULL); } static enum clnt_stat clnt_dg_call(CLIENT *cl, /* client handle */ rpcproc_t proc, /* procedure number */ xdrproc_t xargs, /* xdr routine for args */ void *argsp, /* pointer to args */ xdrproc_t xresults, /* xdr routine for results */ void *resultsp, /* pointer to results */ struct timeval utimeout) /* seconds to wait before giving up */ { struct cu_data *cu = (struct cu_data *)cl->cl_private; XDR *xdrs; size_t outlen = 0; struct rpc_msg reply_msg; XDR reply_xdrs; bool_t ok; int nrefreshes = 2; /* number of times to refresh cred */ struct timeval timeout; struct timeval retransmit_time; struct timeval next_sendtime, starttime, time_waited, tv; struct timespec ts; struct kevent kv; struct sockaddr *sa; sigset_t mask; sigset_t newmask; socklen_t inlen, salen; ssize_t recvlen = 0; int kin_len, n, rpc_lock_value; u_int32_t xid; outlen = 0; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); while (dg_fd_locks[cu->cu_fd]) cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); if (__isthreaded) rpc_lock_value = 1; else rpc_lock_value = 0; dg_fd_locks[cu->cu_fd] = rpc_lock_value; mutex_unlock(&clnt_fd_lock); if (cu->cu_total.tv_usec == -1) { timeout = utimeout; /* use supplied timeout */ } else { timeout = cu->cu_total; /* use default timeout */ } if (cu->cu_connect && !cu->cu_connected) { if (_connect(cu->cu_fd, (struct sockaddr *)&cu->cu_raddr, cu->cu_rlen) < 0) { cu->cu_error.re_errno = errno; cu->cu_error.re_status = RPC_CANTSEND; goto out; } cu->cu_connected = 1; } if (cu->cu_connected) { sa = NULL; salen = 0; } else { sa = (struct sockaddr *)&cu->cu_raddr; salen = cu->cu_rlen; } time_waited.tv_sec = 0; time_waited.tv_usec = 0; retransmit_time = next_sendtime = cu->cu_wait; gettimeofday(&starttime, NULL); /* Clean up in case the last call ended in a longjmp(3) call. */ if (cu->cu_kq >= 0) _close(cu->cu_kq); if ((cu->cu_kq = kqueue()) < 0) { cu->cu_error.re_errno = errno; cu->cu_error.re_status = RPC_CANTSEND; goto out; } kin_len = 1; call_again: xdrs = &(cu->cu_outxdrs); if (cu->cu_async == TRUE && xargs == NULL) goto get_reply; xdrs->x_op = XDR_ENCODE; XDR_SETPOS(xdrs, cu->cu_xdrpos); /* * the transaction is the first thing in the out buffer * XXX Yes, and it's in network byte order, so we should to * be careful when we increment it, shouldn't we. */ xid = ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf)); xid++; *(u_int32_t *)(void *)(cu->cu_outbuf) = htonl(xid); if ((! XDR_PUTINT32(xdrs, &proc)) || (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || (! (*xargs)(xdrs, argsp))) { cu->cu_error.re_status = RPC_CANTENCODEARGS; goto out; } outlen = (size_t)XDR_GETPOS(xdrs); send_again: if (_sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, sa, salen) != outlen) { cu->cu_error.re_errno = errno; cu->cu_error.re_status = RPC_CANTSEND; goto out; } /* * Hack to provide rpc-based message passing */ if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { cu->cu_error.re_status = RPC_TIMEDOUT; goto out; } get_reply: /* * sub-optimal code appears here because we have * some clock time to spare while the packets are in flight. * (We assume that this is actually only executed once.) */ reply_msg.acpted_rply.ar_verf = _null_auth; reply_msg.acpted_rply.ar_results.where = resultsp; reply_msg.acpted_rply.ar_results.proc = xresults; for (;;) { /* Decide how long to wait. */ if (timercmp(&next_sendtime, &timeout, <)) timersub(&next_sendtime, &time_waited, &tv); else timersub(&timeout, &time_waited, &tv); if (tv.tv_sec < 0 || tv.tv_usec < 0) tv.tv_sec = tv.tv_usec = 0; TIMEVAL_TO_TIMESPEC(&tv, &ts); n = _kevent(cu->cu_kq, &cu->cu_kin, kin_len, &kv, 1, &ts); /* We don't need to register the event again. */ kin_len = 0; if (n == 1) { if (kv.flags & EV_ERROR) { cu->cu_error.re_errno = kv.data; cu->cu_error.re_status = RPC_CANTRECV; goto out; } /* We have some data now */ do { recvlen = _recvfrom(cu->cu_fd, cu->cu_inbuf, cu->cu_recvsz, 0, NULL, NULL); } while (recvlen < 0 && errno == EINTR); if (recvlen < 0 && errno != EWOULDBLOCK) { cu->cu_error.re_errno = errno; cu->cu_error.re_status = RPC_CANTRECV; goto out; } if (recvlen >= sizeof(u_int32_t) && (cu->cu_async == TRUE || *((u_int32_t *)(void *)(cu->cu_inbuf)) == *((u_int32_t *)(void *)(cu->cu_outbuf)))) { /* We now assume we have the proper reply. */ break; } } if (n == -1 && errno != EINTR) { cu->cu_error.re_errno = errno; cu->cu_error.re_status = RPC_CANTRECV; goto out; } gettimeofday(&tv, NULL); timersub(&tv, &starttime, &time_waited); /* Check for timeout. */ if (timercmp(&time_waited, &timeout, >)) { cu->cu_error.re_status = RPC_TIMEDOUT; goto out; } /* Retransmit if necessary. */ if (timercmp(&time_waited, &next_sendtime, >)) { /* update retransmit_time */ if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) timeradd(&retransmit_time, &retransmit_time, &retransmit_time); timeradd(&next_sendtime, &retransmit_time, &next_sendtime); goto send_again; } } inlen = (socklen_t)recvlen; /* * now decode and validate the response */ xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); ok = xdr_replymsg(&reply_xdrs, &reply_msg); /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ if (ok) { if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && (reply_msg.acpted_rply.ar_stat == SUCCESS)) cu->cu_error.re_status = RPC_SUCCESS; else _seterr_reply(&reply_msg, &(cu->cu_error)); if (cu->cu_error.re_status == RPC_SUCCESS) { if (! AUTH_VALIDATE(cl->cl_auth, &reply_msg.acpted_rply.ar_verf)) { cu->cu_error.re_status = RPC_AUTHERROR; cu->cu_error.re_why = AUTH_INVALIDRESP; } if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { xdrs->x_op = XDR_FREE; xdr_opaque_auth(xdrs, &(reply_msg.acpted_rply.ar_verf)); } } /* end successful completion */ /* * If unsuccesful AND error is an authentication error * then refresh credentials and try again, else break */ else if (cu->cu_error.re_status == RPC_AUTHERROR) /* maybe our credentials need to be refreshed ... */ if (nrefreshes > 0 && AUTH_REFRESH(cl->cl_auth, &reply_msg)) { nrefreshes--; goto call_again; } /* end of unsuccessful completion */ } /* end of valid reply message */ else { cu->cu_error.re_status = RPC_CANTDECODERES; } out: if (cu->cu_kq >= 0) _close(cu->cu_kq); cu->cu_kq = -1; release_fd_lock(cu->cu_fd, mask); return (cu->cu_error.re_status); } static void clnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) { struct cu_data *cu = (struct cu_data *)cl->cl_private; *errp = cu->cu_error; } static bool_t clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) { struct cu_data *cu = (struct cu_data *)cl->cl_private; XDR *xdrs = &(cu->cu_outxdrs); bool_t dummy; sigset_t mask; sigset_t newmask; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); while (dg_fd_locks[cu->cu_fd]) cond_wait(&dg_cv[cu->cu_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(&dg_cv[cu->cu_fd]); return (dummy); } /*ARGSUSED*/ static void clnt_dg_abort(CLIENT *h) { } static bool_t clnt_dg_control(CLIENT *cl, u_int request, void *info) { struct cu_data *cu = (struct cu_data *)cl->cl_private; struct netbuf *addr; sigset_t mask; sigset_t newmask; int rpc_lock_value; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); while (dg_fd_locks[cu->cu_fd]) cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); if (__isthreaded) rpc_lock_value = 1; else rpc_lock_value = 0; dg_fd_locks[cu->cu_fd] = rpc_lock_value; mutex_unlock(&clnt_fd_lock); switch (request) { case CLSET_FD_CLOSE: cu->cu_closeit = TRUE; release_fd_lock(cu->cu_fd, mask); return (TRUE); case CLSET_FD_NCLOSE: cu->cu_closeit = FALSE; release_fd_lock(cu->cu_fd, mask); return (TRUE); } /* for other requests which use info */ if (info == NULL) { release_fd_lock(cu->cu_fd, mask); return (FALSE); } switch (request) { case CLSET_TIMEOUT: if (time_not_ok((struct timeval *)info)) { release_fd_lock(cu->cu_fd, mask); return (FALSE); } cu->cu_total = *(struct timeval *)info; break; case CLGET_TIMEOUT: *(struct timeval *)info = cu->cu_total; break; case CLGET_SERVER_ADDR: /* Give him the fd address */ /* Now obsolete. Only for backward compatibility */ memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); break; case CLSET_RETRY_TIMEOUT: if (time_not_ok((struct timeval *)info)) { release_fd_lock(cu->cu_fd, mask); return (FALSE); } cu->cu_wait = *(struct timeval *)info; break; case CLGET_RETRY_TIMEOUT: *(struct timeval *)info = cu->cu_wait; break; case CLGET_FD: *(int *)info = cu->cu_fd; break; case CLGET_SVC_ADDR: addr = (struct netbuf *)info; addr->buf = &cu->cu_raddr; addr->len = cu->cu_rlen; addr->maxlen = sizeof cu->cu_raddr; break; case CLSET_SVC_ADDR: /* set to new address */ addr = (struct netbuf *)info; if (addr->len < sizeof cu->cu_raddr) { release_fd_lock(cu->cu_fd, mask); return (FALSE); } memcpy(&cu->cu_raddr, addr->buf, addr->len); cu->cu_rlen = addr->len; break; 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 *)cu->cu_outbuf); break; case CLSET_XID: /* This will set the xid of the NEXT call */ *(u_int32_t *)(void *)cu->cu_outbuf = htonl(*(u_int32_t *)info - 1); /* decrement by 1 as clnt_dg_call() increments 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 *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT)); break; case CLSET_VERS: *(u_int32_t *)(void *)(cu->cu_outbuf + 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 *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT)); break; case CLSET_PROG: *(u_int32_t *)(void *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) = htonl(*(u_int32_t *)info); break; case CLSET_ASYNC: cu->cu_async = *(int *)info; break; case CLSET_CONNECT: cu->cu_connect = *(int *)info; break; default: release_fd_lock(cu->cu_fd, mask); return (FALSE); } release_fd_lock(cu->cu_fd, mask); return (TRUE); } static void clnt_dg_destroy(CLIENT *cl) { struct cu_data *cu = (struct cu_data *)cl->cl_private; int cu_fd = cu->cu_fd; sigset_t mask; sigset_t newmask; sigfillset(&newmask); thr_sigsetmask(SIG_SETMASK, &newmask, &mask); mutex_lock(&clnt_fd_lock); while (dg_fd_locks[cu_fd]) cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); if (cu->cu_closeit) _close(cu_fd); if (cu->cu_kq >= 0) _close(cu->cu_kq); XDR_DESTROY(&(cu->cu_outxdrs)); mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 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); thr_sigsetmask(SIG_SETMASK, &mask, NULL); cond_signal(&dg_cv[cu_fd]); } static struct clnt_ops * clnt_dg_ops(void) { static struct clnt_ops ops; sigset_t mask; 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_dg_call; ops.cl_abort = clnt_dg_abort; ops.cl_geterr = clnt_dg_geterr; ops.cl_freeres = clnt_dg_freeres; ops.cl_destroy = clnt_dg_destroy; ops.cl_control = clnt_dg_control; } mutex_unlock(&ops_lock); thr_sigsetmask(SIG_SETMASK, &mask, NULL); return (&ops); } /* * Make sure that the time is not garbage. -1 value is allowed. */ 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); }