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-rw-r--r--src/clnt_vc.c801
1 files changed, 801 insertions, 0 deletions
diff --git a/src/clnt_vc.c b/src/clnt_vc.c
new file mode 100644
index 0000000..5bbc78b
--- /dev/null
+++ b/src/clnt_vc.c
@@ -0,0 +1,801 @@
+/*
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of Sun Microsystems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * 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 <pthread.h>
+
+#include <reentrant.h>
+#include <sys/types.h>
+#include <poll.h>
+#include <sys/syslog.h>
+#include <sys/un.h>
+#include <sys/uio.h>
+#include <sys/socket.h>
+#include <arpa/inet.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 <stdint.h>
+
+#include <rpc/rpc.h>
+#include "rpc_com.h"
+#include "clnt_fd_locks.h"
+
+#ifdef HAVE_RPCSEC_GSS
+#include <rpc/auth_gss.h>
+#endif
+
+#define MCALL_MSG_SIZE 24
+
+#define CMGROUP_MAX 16
+#define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
+
+#undef rpc_createerr /* make it clear it is a thread safe variable */
+
+/*
+ * Credentials structure, used to verify the identity of a peer
+ * process that has sent us a message. This is allocated by the
+ * peer process but filled in by the kernel. This prevents the
+ * peer from lying about its identity. (Note that cmcred_groups[0]
+ * is the effective GID.)
+ */
+struct cmsgcred {
+ pid_t cmcred_pid; /* PID of sending process */
+ uid_t cmcred_uid; /* real UID of sending process */
+ uid_t cmcred_euid; /* effective UID of sending process */
+ gid_t cmcred_gid; /* real GID of sending process */
+ short cmcred_ngroups; /* number or groups */
+ gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
+};
+
+struct cmessage {
+ struct cmsghdr cmsg;
+ struct cmsgcred cmcred;
+};
+
+static enum clnt_stat clnt_vc_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
+ xdrproc_t, void *, struct timeval);
+static void clnt_vc_geterr(CLIENT *, struct rpc_err *);
+static bool_t clnt_vc_freeres(CLIENT *, xdrproc_t, void *);
+static void clnt_vc_abort(CLIENT *);
+static bool_t clnt_vc_control(CLIENT *, u_int, void *);
+static void clnt_vc_destroy(CLIENT *);
+static struct clnt_ops *clnt_vc_ops(void);
+static bool_t time_not_ok(struct timeval *);
+static int read_vc(void *, void *, int);
+static int write_vc(void *, void *, int);
+
+struct ct_data {
+ int ct_fd; /* connection's fd */
+ fd_lock_t *ct_fd_lock;
+ bool_t ct_closeit; /* close it on destroy */
+ struct timeval ct_wait; /* wait interval in milliseconds */
+ bool_t ct_waitset; /* wait set by clnt_control? */
+ struct netbuf ct_addr; /* remote 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; /* XDR stream */
+};
+
+/*
+ * 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.
+ *
+ * We keep track of a list of per-fd locks, protected by the clnt_fd_lock
+ * mutex. Each per-fd lock consists of a predicate indicating whether is
+ * active or not: fd_lock->active == TRUE => a call is active on some
+ * CLIENT handle created for that fd. Each fd predicate is guarded by a
+ * condition variable so that the global mutex can be unlocked while
+ * waiting for the predicate to change.
+ *
+ * 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 fd_locks_t *vc_fd_locks;
+extern pthread_mutex_t disrupt_lock;
+extern mutex_t clnt_fd_lock;
+#define release_fd_lock(fd_lock, mask) { \
+ mutex_lock(&clnt_fd_lock); \
+ fd_lock->active = FALSE; \
+ fd_lock->pending--; \
+ thr_sigsetmask(SIG_SETMASK, &(mask), (sigset_t *) NULL); \
+ cond_signal(&fd_lock->cv); \
+ mutex_unlock(&clnt_fd_lock); \
+}
+
+static const char clnt_vc_errstr[] = "%s : %s";
+static const char clnt_vc_str[] = "clnt_vc_create";
+static const char __no_mem_str[] = "out of memory";
+
+/*
+ * 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; /* open file descriptor */
+ const struct netbuf *raddr; /* servers address */
+ const rpcprog_t prog; /* program number */
+ const rpcvers_t vers; /* version number */
+ u_int sendsz; /* buffer recv size */
+ u_int recvsz; /* buffer send size */
+{
+ CLIENT *cl; /* client handle */
+ struct ct_data *ct = NULL; /* client handle */
+ struct timeval now;
+ struct rpc_msg call_msg;
+ static u_int32_t disrupt;
+ sigset_t mask;
+ sigset_t newmask;
+ struct sockaddr_storage ss;
+ socklen_t slen;
+ struct __rpc_sockinfo si;
+ fd_lock_t *fd_lock;
+
+ mutex_lock(&disrupt_lock);
+ if (disrupt == 0)
+ disrupt = (u_int32_t)(long)raddr;
+ mutex_unlock(&disrupt_lock);
+
+ cl = (CLIENT *)mem_alloc(sizeof (*cl));
+ ct = (struct ct_data *)mem_alloc(sizeof (*ct));
+ if ((cl == (CLIENT *)NULL) || (ct == (struct ct_data *)NULL)) {
+ struct rpc_createerr *ce = &get_rpc_createerr();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ (void) syslog(LOG_ERR, clnt_vc_errstr,
+ clnt_vc_str, __no_mem_str);
+ goto err;
+ }
+ ct->ct_addr.buf = NULL;
+ sigfillset(&newmask);
+ thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
+ mutex_lock(&clnt_fd_lock);
+ if (vc_fd_locks == (fd_locks_t *) NULL) {
+ vc_fd_locks = fd_locks_init();
+ if (vc_fd_locks == (fd_locks_t *) NULL) {
+ struct rpc_createerr *ce;
+ mutex_unlock(&clnt_fd_lock);
+ ce = &get_rpc_createerr();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ goto err;
+ }
+ }
+ fd_lock = fd_lock_create(fd, vc_fd_locks);
+ if (fd_lock == (fd_lock_t *) NULL) {
+ struct rpc_createerr *ce;
+ mutex_unlock(&clnt_fd_lock);
+ ce = &get_rpc_createerr();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ goto err;
+ }
+
+ /*
+ * Do not hold mutex during connect
+ */
+ mutex_unlock(&clnt_fd_lock);
+
+ slen = sizeof ss;
+ if (getpeername(fd, (struct sockaddr *)&ss, &slen) < 0) {
+ if (errno != ENOTCONN) {
+ struct rpc_createerr *ce = &get_rpc_createerr();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
+ goto err;
+ }
+ if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) < 0){
+ if (errno != EISCONN) {
+ struct rpc_createerr *ce = &get_rpc_createerr();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
+ goto err;
+ }
+ }
+ }
+ if (!__rpc_fd2sockinfo(fd, &si))
+ goto err;
+ thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
+
+ ct->ct_closeit = FALSE;
+
+ /*
+ * Set up private data struct
+ */
+ ct->ct_fd = fd;
+ ct->ct_fd_lock = fd_lock;
+ ct->ct_wait.tv_usec = 0;
+ ct->ct_waitset = FALSE;
+ ct->ct_addr.buf = malloc(raddr->maxlen);
+ if (ct->ct_addr.buf == NULL)
+ goto err;
+ memcpy(ct->ct_addr.buf, raddr->buf, raddr->len);
+ ct->ct_addr.len = raddr->len;
+ ct->ct_addr.maxlen = raddr->maxlen;
+
+ /*
+ * Initialize call message
+ */
+ (void)gettimeofday(&now, NULL);
+ mutex_lock(&disrupt_lock);
+ call_msg.rm_xid = ((u_int32_t)++disrupt) ^ __RPC_GETXID(&now);
+ mutex_unlock(&disrupt_lock);
+ 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 err;
+ }
+ 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.
+ */
+ cl->cl_ops = clnt_vc_ops();
+ cl->cl_private = ct;
+ cl->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,
+ cl->cl_private, read_vc, write_vc);
+ return (cl);
+
+err:
+ if (cl) {
+ if (ct) {
+ if (ct->ct_addr.len)
+ mem_free(ct->ct_addr.buf, ct->ct_addr.len);
+ mem_free(ct, sizeof (struct ct_data));
+ }
+ mem_free(cl, sizeof (CLIENT));
+ } else if (ct) {
+ if (ct->ct_addr.len)
+ mem_free(ct->ct_addr.buf, ct->ct_addr.len);
+ mem_free(ct, sizeof (struct ct_data));
+ }
+ return ((CLIENT *)NULL);
+}
+
+static enum clnt_stat
+clnt_vc_call(cl, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout)
+ CLIENT *cl;
+ rpcproc_t proc;
+ xdrproc_t xdr_args;
+ void *args_ptr;
+ xdrproc_t xdr_results;
+ void *results_ptr;
+ struct timeval timeout;
+{
+ struct ct_data *ct = (struct ct_data *) cl->cl_private;
+ XDR *xdrs = &(ct->ct_xdrs);
+ struct rpc_msg reply_msg;
+ u_int32_t x_id;
+ u_int32_t *msg_x_id = &ct->ct_u.ct_mcalli; /* yuk */
+ bool_t shipnow;
+ int refreshes = 2;
+ sigset_t mask, newmask;
+
+ assert(cl != NULL);
+
+ sigfillset(&newmask);
+ thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
+ mutex_lock(&clnt_fd_lock);
+ ct->ct_fd_lock->pending++;
+ while (ct->ct_fd_lock->active)
+ cond_wait(&ct->ct_fd_lock->cv, &clnt_fd_lock);
+ ct->ct_fd_lock->active = TRUE;
+ mutex_unlock(&clnt_fd_lock);
+ if (!ct->ct_waitset) {
+ /* If time is not within limits, we ignore it. */
+ if (time_not_ok(&timeout) == FALSE)
+ ct->ct_wait = timeout;
+ }
+
+ shipnow =
+ (xdr_results == NULL && timeout.tv_sec == 0
+ && timeout.tv_usec == 0) ? FALSE : TRUE;
+
+#ifdef HAVE_RPCSEC_GSS
+ if (is_authgss_client(cl))
+ refreshes = 0;
+#endif
+
+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(cl->cl_auth, xdrs)) ||
+ (! AUTH_WRAP(cl->cl_auth, xdrs, xdr_args, 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_lock, mask);
+ return (ct->ct_error.re_status);
+ }
+ if (! xdrrec_endofrecord(xdrs, shipnow)) {
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (ct->ct_error.re_status = RPC_CANTSEND);
+ }
+ if (! shipnow) {
+ release_fd_lock(ct->ct_fd_lock, 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_lock, mask);
+ return(ct->ct_error.re_status = RPC_TIMEDOUT);
+ }
+
+
+ /*
+ * Keep receiving until we get a valid transaction id
+ */
+ xdrs->x_op = XDR_DECODE;
+ while (TRUE) {
+ 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_lock, 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_lock, 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(cl->cl_auth,
+ &reply_msg.acpted_rply.ar_verf)) {
+ ct->ct_error.re_status = RPC_AUTHERROR;
+ ct->ct_error.re_why = AUTH_INVALIDRESP;
+ } else if (! AUTH_UNWRAP(cl->cl_auth, xdrs,
+ xdr_results, 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(cl->cl_auth, &reply_msg))
+ goto call_again;
+ } /* end of unsuccessful completion */
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (ct->ct_error.re_status);
+}
+
+static void
+clnt_vc_geterr(cl, errp)
+ 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(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);
+ ct->ct_fd_lock->pending++;
+ while (ct->ct_fd_lock->active)
+ cond_wait(&ct->ct_fd_lock->cv, &clnt_fd_lock);
+ xdrs->x_op = XDR_FREE;
+ dummy = (*xdr_res)(xdrs, res_ptr);
+ ct->ct_fd_lock->pending--;
+ thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
+ cond_signal(&ct->ct_fd_lock->cv);
+ mutex_unlock(&clnt_fd_lock);
+
+ 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;
+ u_int32_t tmp;
+ u_int32_t ltmp;
+
+ assert(cl != NULL);
+
+ ct = (struct ct_data *)cl->cl_private;
+
+ sigfillset(&newmask);
+ thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
+ mutex_lock(&clnt_fd_lock);
+ ct->ct_fd_lock->pending++;
+ while (ct->ct_fd_lock->active)
+ cond_wait(&ct->ct_fd_lock->cv, &clnt_fd_lock);
+ ct->ct_fd_lock->active = TRUE;
+ mutex_unlock(&clnt_fd_lock);
+
+ switch (request) {
+ case CLSET_FD_CLOSE:
+ ct->ct_closeit = TRUE;
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (TRUE);
+ case CLSET_FD_NCLOSE:
+ ct->ct_closeit = FALSE;
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (TRUE);
+ default:
+ break;
+ }
+
+ /* for other requests which use info */
+ if (info == NULL) {
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (FALSE);
+ }
+ switch (request) {
+ case CLSET_TIMEOUT:
+ if (time_not_ok((struct timeval *)info)) {
+ release_fd_lock(ct->ct_fd_lock, 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_lock, 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
+ */
+ memcpy(&tmp, ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT, sizeof (tmp));
+ ltmp = ntohl(tmp);
+ memcpy(info, &ltmp, sizeof (ltmp));
+ break;
+
+ case CLSET_VERS:
+ memcpy(&ltmp, info, sizeof (ltmp));
+ tmp = htonl(ltmp);
+ memcpy(ct->ct_u.ct_mcallc + 4 * BYTES_PER_XDR_UNIT, &tmp, sizeof(tmp));
+ 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
+ */
+ memcpy(&tmp, ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT, sizeof (tmp));
+ ltmp = ntohl (tmp);
+ memcpy(info, &ltmp, sizeof (ltmp));
+ break;
+
+ case CLSET_PROG:
+ memcpy(&ltmp, info, sizeof (ltmp));
+ tmp = htonl(ltmp);
+ memcpy(ct->ct_u.ct_mcallc + 3 * BYTES_PER_XDR_UNIT, &tmp, sizeof(tmp));
+ break;
+
+ default:
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (FALSE);
+ }
+ release_fd_lock(ct->ct_fd_lock, mask);
+ return (TRUE);
+}
+
+
+static void
+clnt_vc_destroy(cl)
+ CLIENT *cl;
+{
+ assert(cl != NULL);
+ struct ct_data *ct = (struct ct_data *) cl->cl_private;
+ int ct_fd = ct->ct_fd;
+ fd_lock_t *ct_fd_lock = ct->ct_fd_lock;
+ sigset_t mask;
+ sigset_t newmask;
+
+ sigfillset(&newmask);
+ thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
+ mutex_lock(&clnt_fd_lock);
+ /* wait until all pending operations on client are completed. */
+ while (ct_fd_lock->pending > 0) {
+ /* If a blocked operation can be awakened, then do it. */
+ if (ct_fd_lock->active == FALSE)
+ cond_signal(&ct_fd_lock->cv);
+ /* keep waiting... */
+ cond_wait(&ct_fd_lock->cv, &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));
+ 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));
+ cond_signal(&ct_fd_lock->cv);
+ fd_lock_destroy(ct_fd, ct_fd_lock, vc_fd_locks);
+ mutex_unlock(&clnt_fd_lock);
+ thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
+}
+
+/*
+ * 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;
+ }
+
+ 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 ct_data *ct = (struct ct_data *)ctp;
+ int i = 0, 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;
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-26 02:48:42 +0000