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ms-nfs41-client/libtirpc/src/clnt_vc.c
Olga Kornievskaia b6beb6f2a9 [libtircp] adding timeout on async recv 
once libtirpc blocking recv was changed to a polling receive,
we no longer had a timeout mechanims on waiting for a reply.

solution: save a timestamp before the recv call, on each async recv return
check if the time lapsed does not exceed the timeout value. when timeout
is reach, return TIMEDOUT rpc error.
2011-05-16 15:46:45 -04:00

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/*
* 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 <wintirpc.h>
//#include <pthread.h>
#include <reentrant.h>
#include <sys/types.h>
//#include <sys/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 <time.h>
#include <rpc/rpc.h>
#include "rpc_com.h"
#define MCALL_MSG_SIZE 24
#define CMGROUP_MAX 16
#define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
/*
* 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 */
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 */
struct rpc_msg reply_msg;
bool_t use_stored_reply_msg;
};
/*
* 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 active 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.
*/
static int *vc_fd_locks;
extern mutex_t clnt_fd_lock;
static cond_t *vc_cv;
#ifndef _WIN32
#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), (sigset_t *) NULL); \
cond_signal(&vc_cv[fd]); \
}
#else
/* XXX Need Windows signal/event stuff XXX */
#define release_fd_lock(fd, mask) { \
mutex_lock(&clnt_fd_lock); \
vc_fd_locks[WINSOCK_HANDLE_HASH(fd)] = 0; \
mutex_unlock(&clnt_fd_lock); \
\
cond_broadcast(&vc_cv[WINSOCK_HANDLE_HASH(fd)]); \
}
#endif
#define acquire_fd_lock(fd) { \
mutex_lock(&clnt_fd_lock); \
while (vc_fd_locks[WINSOCK_HANDLE_HASH(fd)] && \
vc_fd_locks[WINSOCK_HANDLE_HASH(fd)] != GetCurrentThreadId()) \
cond_wait(&vc_cv[WINSOCK_HANDLE_HASH(fd)], &clnt_fd_lock); \
vc_fd_locks[WINSOCK_HANDLE_HASH(fd)] = GetCurrentThreadId(); \
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 clnt_read_vc_str[] = "read_vc";
static const char __no_mem_str[] = "out of memory";
/* callback thread */
#define CALLBACK_TIMEOUT 5000
#define RQCRED_SIZE 400 /* this size is excessive */
static unsigned int WINAPI clnt_cb_thread(void *args)
{
int status = NO_ERROR;
CLIENT *cl = (CLIENT *)args;
struct ct_data *ct = (struct ct_data *) cl->cl_private;
XDR *xdrs = &(ct->ct_xdrs);
long saved_timeout_sec = ct->ct_wait.tv_sec;
long saved_timeout_usec = ct->ct_wait.tv_usec;
struct rpc_msg reply_msg;
char cred_area[2 * MAX_AUTH_BYTES + RQCRED_SIZE];
fprintf(stderr/*stdout*/, "%04x: Creating callback thread\n", GetCurrentThreadId());
while(1) {
cb_req header;
void *res = NULL;
mutex_lock(&clnt_fd_lock);
while (vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)] ||
!ct->use_stored_reply_msg ||
(ct->use_stored_reply_msg && ct->reply_msg.rm_direction != CALL)) {
if (cl->shutdown)
break;
if (!cond_wait_timed(&vc_cv[WINSOCK_HANDLE_HASH(ct->ct_fd)], &clnt_fd_lock,
CALLBACK_TIMEOUT))
if (!vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)])
break;
}
vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)] = GetCurrentThreadId();
mutex_unlock(&clnt_fd_lock);
if (cl->shutdown) {
fprintf(stdout, "%04x: callback received shutdown signal\n", GetCurrentThreadId());
release_fd_lock(ct->ct_fd, mask);
goto out;
}
saved_timeout_sec = ct->ct_wait.tv_sec;
saved_timeout_usec = ct->ct_wait.tv_usec;
xdrs->x_op = XDR_DECODE;
if (ct->use_stored_reply_msg && ct->reply_msg.rm_direction == CALL) {
goto process_rpc_call;
} else if (!ct->use_stored_reply_msg) {
ct->ct_wait.tv_sec = ct->ct_wait.tv_usec = 0;
__xdrrec_setnonblock(xdrs, 0);
if (!xdrrec_skiprecord(xdrs))
goto skip_process;
if (!xdr_getxiddir(xdrs, &ct->reply_msg)) {
goto skip_process;
}
if (ct->reply_msg.rm_direction == CALL) {
goto process_rpc_call;
} else {
if (ct->reply_msg.rm_direction == REPLY)
ct->use_stored_reply_msg = TRUE;
goto skip_setlastfrag;
}
} else {
goto skip_setlastfrag;
}
process_rpc_call:
//call to get call headers
ct->use_stored_reply_msg = FALSE;
ct->reply_msg.rm_call.cb_cred.oa_base = cred_area;
ct->reply_msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
if (!xdr_getcallbody(xdrs, &ct->reply_msg)) {
fprintf(stderr, "%04x: xdr_getcallbody failed\n", GetCurrentThreadId());
goto skip_process;
} else
fprintf(stdout, "%04x: callbody: rpcvers %d cb_prog %d cb_vers %d cb_proc %d\n",
GetCurrentThreadId(),
ct->reply_msg.rm_call.cb_rpcvers, ct->reply_msg.rm_call.cb_prog,
ct->reply_msg.rm_call.cb_vers, ct->reply_msg.rm_call.cb_proc);
header.rq_prog = ct->reply_msg.rm_call.cb_prog;
header.rq_vers = ct->reply_msg.rm_call.cb_vers;
header.rq_proc = ct->reply_msg.rm_call.cb_proc;
header.xdr = xdrs;
status = (*cl->cb_fn)(cl->cb_args, &header, &res);
if (status) {
fprintf(stderr, "%04x: callback function failed with %d\n", status);
}
xdrs->x_op = XDR_ENCODE;
__xdrrec_setblock(xdrs);
reply_msg.rm_xid = ct->reply_msg.rm_xid;
fprintf(stdout, "%04x: cb: replying to xid %d\n", GetCurrentThreadId(),
ct->reply_msg.rm_xid);
ct->reply_msg.rm_xid = 0;
reply_msg.rm_direction = REPLY;
reply_msg.rm_reply.rp_stat = MSG_ACCEPTED;
reply_msg.acpted_rply.ar_verf = _null_auth;
reply_msg.acpted_rply.ar_stat = status;
reply_msg.acpted_rply.ar_results.where = NULL;
reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
xdr_replymsg(xdrs, &reply_msg);
if (!status) {
(*cl->cb_xdr)(xdrs, res); /* encode the results */
xdrs->x_op = XDR_FREE;
(*cl->cb_xdr)(xdrs, res); /* free the results */
}
if (! xdrrec_endofrecord(xdrs, 1)) {
fprintf(stderr, "%04x: failed to send REPLY\n", GetCurrentThreadId());
}
skip_process:
ct->reply_msg.rm_direction = -1;
xdrrec_setlastfrag(xdrs);
skip_setlastfrag:
ct->ct_wait.tv_sec = saved_timeout_sec;
ct->ct_wait.tv_usec = saved_timeout_usec;
release_fd_lock(ct->ct_fd, mask);
}
out:
return status;
}
/*
* 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, cb_xdr, cb_fn, cb_args)
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 */
int (*cb_xdr)(void *, void *); /* if not NULL, point to function to xdr CB args */
int (*cb_fn)(void *, void *, void **); /* if not NULL, pointer to function to handle RPC_CALLs */
void *cb_args; /* if not NULL, pointer to pass into cb_fn */
{
CLIENT *cl; /* client handle */
struct ct_data *ct = NULL; /* client handle */
struct timeval now;
struct rpc_msg call_msg;
static u_int32_t disrupt;
#ifndef _WIN32
sigset_t mask;
sigset_t newmask;
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
struct sockaddr_storage ss;
socklen_t slen;
struct __rpc_sockinfo si;
if (disrupt == 0)
disrupt = PtrToUlong(raddr);
cl = (CLIENT *)mem_alloc(sizeof (*cl));
ct = (struct ct_data *)mem_alloc(sizeof (*ct));
if ((cl == (CLIENT *)NULL) || (ct == (struct ct_data *)NULL)) {
// (void) syslog(LOG_ERR, clnt_vc_errstr,
// clnt_vc_str, __no_mem_str);
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
goto err;
}
ct->ct_addr.buf = NULL;
#ifndef _WIN32
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
mutex_lock(&clnt_fd_lock);
if (vc_fd_locks == (int *) NULL) {
int cv_allocsz, fd_allocsz;
int dtbsize = __rpc_dtbsize();
fd_allocsz = dtbsize * sizeof (int);
vc_fd_locks = (int *) mem_alloc(fd_allocsz);
if (vc_fd_locks == (int *) NULL) {
mutex_unlock(&clnt_fd_lock);
// thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
goto err;
} else
memset(vc_fd_locks, 0, fd_allocsz);
assert(vc_cv == (cond_t *) NULL);
cv_allocsz = dtbsize * sizeof (cond_t);
vc_cv = (cond_t *) mem_alloc(cv_allocsz);
if (vc_cv == (cond_t *) NULL) {
mem_free(vc_fd_locks, fd_allocsz);
vc_fd_locks = (int *) NULL;
mutex_unlock(&clnt_fd_lock);
// thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
goto err;
} else {
int i;
for (i = 0; i < dtbsize; i++)
cond_init(&vc_cv[i], 0, (void *) 0);
}
} else
assert(vc_cv != (cond_t *) NULL);
/*
* XXX - fvdl connecting while holding a mutex?
*/
slen = sizeof ss;
if (getpeername(fd, (struct sockaddr *)&ss, &slen) == SOCKET_ERROR) {
errno = WSAGetLastError();
if (errno != WSAENOTCONN) {
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 err;
}
if (connect(fd, (struct sockaddr *)raddr->buf, raddr->len) == SOCKET_ERROR){
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = WSAGetLastError();
mutex_unlock(&clnt_fd_lock);
// thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
goto err;
}
}
mutex_unlock(&clnt_fd_lock);
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_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;
ct->use_stored_reply_msg = FALSE;
/*
* Initialize call message
*/
(void)gettimeofday(&now, NULL);
call_msg.rm_xid = ((u_int32_t)++disrupt) ^ __RPC_GETXID(&now);
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)closesocket(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);
if (cb_xdr && cb_fn && cb_args) {
cl->cb_xdr = cb_xdr;
cl->cb_fn = cb_fn;
cl->cb_args = cb_args;
cl->cb_thread = (HANDLE)_beginthreadex(NULL,
0, clnt_cb_thread, cl, 0, NULL);
if (cl->cb_thread == INVALID_HANDLE_VALUE) {
fprintf(stderr, "_beginthreadex failed %d\n", GetLastError());
goto err;
} else
fprintf(stdout, "%04x: started the callback thread %04x\n",
GetCurrentThreadId(), cl->cb_thread);
} else
cl->cb_thread = INVALID_HANDLE_VALUE;
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));
}
if (cl)
mem_free(cl, sizeof (CLIENT));
}
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);
u_int32_t x_id;
u_int32_t *msg_x_id = &ct->ct_u.ct_mcalli; /* yuk */
bool_t shipnow;
int refreshes = 2;
u_int seq = -1;
time_t start_send, time_now;
#ifndef _WIN32
sigset_t mask, newmask;
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
enum clnt_stat status;
assert(cl != NULL);
#ifndef _WIN32
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
acquire_fd_lock(ct->ct_fd);
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;
call_again:
__xdrrec_setblock(xdrs);
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, &seq)) ||
(! 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);
goto out;
}
if (! xdrrec_endofrecord(xdrs, shipnow)) {
ct->ct_error.re_status = RPC_CANTSEND;
goto out;
}
if (! shipnow) {
release_fd_lock(ct->ct_fd, mask);
return (RPC_SUCCESS);
}
#ifdef NO_CB_4_KRB5P
if (cl->cb_thread != INVALID_HANDLE_VALUE)
release_fd_lock(ct->ct_fd, mask);
#endif
/*
* Keep receiving until we get a valid transaction id
*/
time(&start_send);
while (TRUE) {
#ifdef NO_CB_4_KRB5P
if (cl->cb_thread != INVALID_HANDLE_VALUE) {
mutex_lock(&clnt_fd_lock);
while ((vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)] &&
vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)] != GetCurrentThreadId()) ||
(ct->reply_msg.rm_xid && ct->reply_msg.rm_xid != x_id))
cond_wait(&vc_cv[WINSOCK_HANDLE_HASH(ct->ct_fd)], &clnt_fd_lock);
vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)] = GetCurrentThreadId();
mutex_unlock(&clnt_fd_lock);
}
#endif
__xdrrec_setnonblock(xdrs, 0);
xdrs->x_op = XDR_DECODE;
ct->reply_msg.acpted_rply.ar_verf = _null_auth;
ct->reply_msg.acpted_rply.ar_results.where = NULL;
ct->reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
if (!ct->use_stored_reply_msg) {
if (!xdrrec_skiprecord(xdrs)) {
#ifdef NO_CB_4_KRB5P
if (cl->cb_thread != INVALID_HANDLE_VALUE)
#endif
release_fd_lock(ct->ct_fd, mask);
time(&time_now);
if (time_now - start_send >= timeout.tv_sec) {
ct->ct_error.re_status = RPC_TIMEDOUT;
goto out;
}
SwitchToThread();
continue;
}
if (!xdr_getxiddir(xdrs, &ct->reply_msg)) {
if (ct->ct_error.re_status == RPC_SUCCESS) {
release_fd_lock(ct->ct_fd, mask);
continue;
}
goto out;
}
if (ct->reply_msg.rm_direction != REPLY) {
if (cl->cb_thread == INVALID_HANDLE_VALUE) {
ct->reply_msg.rm_xid = 0;
} else {
ct->use_stored_reply_msg = TRUE;
}
release_fd_lock(ct->ct_fd, mask);
SwitchToThread();
continue;
}
}
if (ct->reply_msg.rm_xid == x_id) {
ct->use_stored_reply_msg = FALSE;
ct->reply_msg.rm_xid = 0;
if (!xdr_getreplyunion(xdrs, &ct->reply_msg))
goto out;
break;
}
else {
ct->use_stored_reply_msg = TRUE;
release_fd_lock(ct->ct_fd, mask);
SwitchToThread();
}
}
/*
* process header
*/
_seterr_reply(&ct->reply_msg, &(ct->ct_error));
if (ct->ct_error.re_status == RPC_SUCCESS) {
if (! AUTH_VALIDATE(cl->cl_auth,
&ct->reply_msg.acpted_rply.ar_verf, seq)) {
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, seq)) {
if (ct->ct_error.re_status == RPC_SUCCESS)
ct->ct_error.re_status = RPC_CANTDECODERES;
}
/* free verifier ... */
if (ct->reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
xdrs->x_op = XDR_FREE;
(void)xdr_opaque_auth(xdrs,
&(ct->reply_msg.acpted_rply.ar_verf));
}
} /* end successful completion */
else {
if (ct->reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
xdrs->x_op = XDR_FREE;
(void)xdr_opaque_auth(xdrs,
&(ct->reply_msg.acpted_rply.ar_verf));
}
/* maybe our credentials need to be refreshed ... */
if (refreshes-- && AUTH_REFRESH(cl->cl_auth, &ct->reply_msg))
goto call_again;
} /* end of unsuccessful completion */
ct->reply_msg.rm_direction = -1;
out:
status = ct->ct_error.re_status;
release_fd_lock(ct->ct_fd, mask);
return 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;
#ifndef _WIN32
sigset_t mask;
sigset_t newmask;
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
assert(cl != NULL);
ct = (struct ct_data *)cl->cl_private;
xdrs = &(ct->ct_xdrs);
#ifndef _WIN32
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
mutex_lock(&clnt_fd_lock);
while (vc_fd_locks[WINSOCK_HANDLE_HASH(ct->ct_fd)])
cond_wait(&vc_cv[WINSOCK_HANDLE_HASH(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[WINSOCK_HANDLE_HASH(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;
#ifndef _WIN32
sigset_t mask;
sigset_t newmask;
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
assert(cl != NULL);
ct = (struct ct_data *)cl->cl_private;
#ifndef _WIN32
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
acquire_fd_lock(ct->ct_fd);
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;
#ifndef _WIN32
sigset_t mask;
sigset_t newmask;
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
assert(cl != NULL);
ct = (struct ct_data *) cl->cl_private;
#ifndef _WIN32
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
mutex_lock(&clnt_fd_lock);
while (vc_fd_locks[WINSOCK_HANDLE_HASH(ct_fd)])
cond_wait(&vc_cv[WINSOCK_HANDLE_HASH(ct_fd)], &clnt_fd_lock);
if (cl->cb_thread != INVALID_HANDLE_VALUE) {
int status;
fprintf(stdout, "%04x: sending shutdown to callback thread %04x\n",
GetCurrentThreadId(), cl->cb_thread);
cl->shutdown = 1;
mutex_unlock(&clnt_fd_lock);
cond_signal(&vc_cv[WINSOCK_HANDLE_HASH(ct_fd)]);
status = WaitForSingleObject(cl->cb_thread, INFINITE);
fprintf(stdout, "%04x: terminated callback thread\n", GetCurrentThreadId());
mutex_lock(&clnt_fd_lock);
while (vc_fd_locks[WINSOCK_HANDLE_HASH(ct_fd)])
cond_wait(&vc_cv[WINSOCK_HANDLE_HASH(ct_fd)], &clnt_fd_lock);
}
if (ct->ct_closeit && ct->ct_fd != -1) {
(void)closesocket(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));
mutex_unlock(&clnt_fd_lock);
// thr_sigsetmask(SIG_SETMASK, &(mask), NULL);
cond_signal(&vc_cv[WINSOCK_HANDLE_HASH(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 SOCKET_ERROR:
errno = WSAGetLastError();
if (errno == WSAEINTR)
continue;
ct->ct_error.re_status = RPC_CANTRECV;
ct->ct_error.re_errno = errno;
return (-2);
}
break;
}
len = recv(ct->ct_fd, buf, (size_t)len, 0);
errno = WSAGetLastError();
switch (len) {
case 0:
/* premature eof */
ct->ct_error.re_errno = WSAECONNRESET;
ct->ct_error.re_status = RPC_CANTRECV;
len = -1; /* it's really an error */
break;
case SOCKET_ERROR:
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;
char *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 = send(ct->ct_fd, buf, (size_t)cnt, 0)) == SOCKET_ERROR) {
ct->ct_error.re_errno = WSAGetLastError();
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;
#ifndef _WIN32
sigset_t mask, newmask;
/* VARIABLES PROTECTED BY ops_lock: ops */
sigfillset(&newmask);
thr_sigsetmask(SIG_SETMASK, &newmask, &mask);
#else
/* XXX Need Windows signal/event stuff XXX */
#endif
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);
}
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