Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/rpc/clnt_tcp.c	Lines:	0	173	0.0 %
Date:	2017-11-07	Branches:	0	111	0.0 %


/*	$OpenBSD: clnt_tcp.c,v 1.29 2015/11/01 03:45:29 guenther Exp $ */

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * 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 the "Oracle America, 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.
 *
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <rpc/pmap_clnt.h>

#define MCALL_MSG_SIZE 24

static enum clnt_stat	clnttcp_call(CLIENT *, u_long, xdrproc_t, caddr_t,
			    xdrproc_t, caddr_t, struct timeval);
static void		clnttcp_abort(CLIENT *);
static void		clnttcp_geterr(CLIENT *, struct rpc_err *);
static bool_t		clnttcp_freeres(CLIENT *, xdrproc_t, caddr_t);
static bool_t           clnttcp_control(CLIENT *, u_int, void *);
static void		clnttcp_destroy(CLIENT *);

static struct clnt_ops tcp_ops = {
	clnttcp_call,
	clnttcp_abort,
	clnttcp_geterr,
	clnttcp_freeres,
	clnttcp_destroy,
	clnttcp_control
};

struct ct_data {
	int		ct_sock;
	bool_t		ct_closeit;
	struct timeval	ct_wait;
	bool_t          ct_waitset;       /* wait set by clnt_control? */
	struct sockaddr_in ct_addr;
	struct rpc_err	ct_error;
	char		ct_mcall[MCALL_MSG_SIZE];	/* marshalled callmsg */
	u_int		ct_mpos;			/* pos after marshal */
	XDR		ct_xdrs;
};

static int	readtcp(struct ct_data *, caddr_t, int);
static int	writetcp(struct ct_data *, caddr_t, int);

/*
 * Create a client handle for a tcp/ip connection.
 * If *sockp<0, *sockp is set to a newly created TCP socket and it is
 * connected to raddr.  If *sockp non-negative then
 * raddr is ignored.  The rpc/tcp package does buffering
 * similar to stdio, so the client must pick send and receive buffer sizes,];
 * 0 => use the default.
 * If raddr->sin_port is 0, then a binder on the remote machine is
 * consulted for the right port number.
 * NB: *sockp is copied into a private area.
 * NB: It is the client's responsibility to close *sockp, unless
 *     clnttcp_create() was called with *sockp = -1 (so it created
 *     the socket), and CLNT_DESTROY() is used.
 * NB: The rpch->cl_auth is set null authentication.  Caller may wish to set this
 * something more useful.
 */
CLIENT *
clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
    u_int sendsz, u_int recvsz)
{
	CLIENT *h;
	struct ct_data *ct = NULL;
	struct timeval now;
	struct rpc_msg call_msg;

	h  = (CLIENT *)mem_alloc(sizeof(*h));
	if (h == NULL) {
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}
	ct = (struct ct_data *)mem_alloc(sizeof(*ct));
	if (ct == NULL) {
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}

	/*
	 * If no port number given ask the pmap for one
	 */
	if (raddr->sin_port == 0) {
		u_short port;
		if ((port = pmap_getport(raddr, prog, vers, IPPROTO_TCP)) == 0) {
			mem_free((caddr_t)ct, sizeof(struct ct_data));
			mem_free((caddr_t)h, sizeof(CLIENT));
			return (NULL);
		}
		raddr->sin_port = htons(port);
	}

	/*
	 * If no socket given, open one
	 */
	if (*sockp < 0) {
		*sockp = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
		(void)bindresvport(*sockp, NULL);
		if ((*sockp < 0)
		    || (connect(*sockp, (struct sockaddr *)raddr,
		    sizeof(*raddr)) < 0)) {
			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
			rpc_createerr.cf_error.re_errno = errno;
			if (*sockp != -1)
				(void)close(*sockp);
			goto fooy;
		}
		ct->ct_closeit = TRUE;
	} else {
		ct->ct_closeit = FALSE;
	}

	/*
	 * Set up private data struct
	 */
	ct->ct_sock = *sockp;
	ct->ct_wait.tv_usec = 0;
	ct->ct_waitset = FALSE;
	ct->ct_addr = *raddr;

	/*
	 * Initialize call message
	 */
	(void)gettimeofday(&now, NULL);
	call_msg.rm_xid = arc4random();
	call_msg.rm_direction = CALL;
	call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
	call_msg.rm_call.cb_prog = prog;
	call_msg.rm_call.cb_vers = vers;

	/*
	 * pre-serialize the static part of the call msg and stash it away
	 */
	xdrmem_create(&(ct->ct_xdrs), ct->ct_mcall, MCALL_MSG_SIZE,
	    XDR_ENCODE);
	if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
		if (ct->ct_closeit) {
			(void)close(*sockp);
		}
		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.
	 */
	xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
	    (caddr_t)ct, (int(*)(caddr_t, caddr_t, int))readtcp,
	    (int(*)(caddr_t, caddr_t, int))writetcp);
	h->cl_ops = &tcp_ops;
	h->cl_private = (caddr_t) ct;
	h->cl_auth = authnone_create();
	if (h->cl_auth == NULL) {
		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
		rpc_createerr.cf_error.re_errno = errno;
		goto fooy;
	}
	return (h);

fooy:
	/*
	 * Something goofed, free stuff and barf
	 */
	if (ct)
		mem_free((caddr_t)ct, sizeof(struct ct_data));
	if (h)
		mem_free((caddr_t)h, sizeof(CLIENT));
	return (NULL);
}
DEF_WEAK(clnttcp_create);

static enum clnt_stat
clnttcp_call(CLIENT *h, u_long proc, xdrproc_t xdr_args, caddr_t args_ptr,
    xdrproc_t xdr_results, caddr_t results_ptr, struct timeval timeout)
{
	struct ct_data *ct = (struct ct_data *) h->cl_private;
	XDR *xdrs = &(ct->ct_xdrs);
	struct rpc_msg reply_msg;
	u_long x_id;
	u_int32_t *msg_x_id = (u_int32_t *)(ct->ct_mcall);	/* yuk */
	bool_t shipnow;
	int refreshes = 2;

	if (!ct->ct_waitset) {
		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_mcall, ct->ct_mpos)) ||
	    (! XDR_PUTLONG(xdrs, (long *)&proc)) ||
	    (! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
	    (! (*xdr_args)(xdrs, args_ptr))) {
		if (ct->ct_error.re_status == RPC_SUCCESS)
			ct->ct_error.re_status = RPC_CANTENCODEARGS;
		(void)xdrrec_endofrecord(xdrs, TRUE);
		return (ct->ct_error.re_status);
	}
	if (! xdrrec_endofrecord(xdrs, shipnow))
		return (ct->ct_error.re_status = RPC_CANTSEND);
	if (! shipnow)
		return (RPC_SUCCESS);
	/*
	 * Hack to provide rpc-based message passing
	 */
	if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
		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 = xdr_void;
		if (! xdrrec_skiprecord(xdrs))
			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;
			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 */
	return (ct->ct_error.re_status);
}

static void
clnttcp_geterr(CLIENT *h, struct rpc_err *errp)
{
	struct ct_data *ct =
	    (struct ct_data *) h->cl_private;

	*errp = ct->ct_error;
}

static bool_t
clnttcp_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
{
	struct ct_data *ct = (struct ct_data *)cl->cl_private;
	XDR *xdrs = &(ct->ct_xdrs);

	xdrs->x_op = XDR_FREE;
	return ((*xdr_res)(xdrs, res_ptr));
}

static void
clnttcp_abort(CLIENT *clnt)
{
}

static bool_t
clnttcp_control(CLIENT *cl, u_int request, void *info)
{
	struct ct_data *ct = (struct ct_data *)cl->cl_private;

	switch (request) {
	case CLSET_TIMEOUT:
		ct->ct_wait = *(struct timeval *)info;
		ct->ct_waitset = TRUE;
		break;
	case CLGET_TIMEOUT:
		*(struct timeval *)info = ct->ct_wait;
		break;
	case CLGET_SERVER_ADDR:
		*(struct sockaddr_in *)info = ct->ct_addr;
		break;
	default:
		return (FALSE);
	}
	return (TRUE);
}


static void
clnttcp_destroy(CLIENT *h)
{
	struct ct_data *ct =
	    (struct ct_data *) h->cl_private;

	if (ct->ct_closeit && ct->ct_sock != -1) {
		(void)close(ct->ct_sock);
	}
	XDR_DESTROY(&(ct->ct_xdrs));
	mem_free((caddr_t)ct, sizeof(struct ct_data));
	mem_free((caddr_t)h, sizeof(CLIENT));
}

/*
 * 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
readtcp(struct ct_data *ct, caddr_t buf, int len)
{
	struct pollfd pfd[1];
	struct timeval start, after, duration, tmp;
	int delta, r, save_errno;

	if (len == 0)
		return (0);

	pfd[0].fd = ct->ct_sock;
	pfd[0].events = POLLIN;
	delta = ct->ct_wait.tv_sec * 1000 + ct->ct_wait.tv_usec / 1000;
	gettimeofday(&start, NULL);
	for (;;) {
		r = poll(pfd, 1, delta);
		save_errno = errno;

		gettimeofday(&after, NULL);
		timersub(&start, &after, &duration);
		timersub(&ct->ct_wait, &duration, &tmp);
		delta = tmp.tv_sec * 1000 + tmp.tv_usec / 1000;
		if (delta <= 0)
			r = 0;

		switch (r) {
		case 0:
			ct->ct_error.re_status = RPC_TIMEDOUT;
			return (-1);
		case 1:
			if (pfd[0].revents & POLLNVAL)
				errno = EBADF;
			else if (pfd[0].revents & POLLERR)
				errno = EIO;
			else
				break;
			/* FALLTHROUGH */
		case -1:
			if (errno == EINTR)
				continue;
			ct->ct_error.re_status = RPC_CANTRECV;
			ct->ct_error.re_errno = save_errno;
			return (-1);
		}
		break;
	}

	switch (len = read(ct->ct_sock, buf, 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
writetcp(struct ct_data *ct, caddr_t buf, int len)
{
	int i, cnt;

	for (cnt = len; cnt > 0; cnt -= i, buf += i) {
		if ((i = write(ct->ct_sock, buf, cnt)) == -1) {
			ct->ct_error.re_errno = errno;
			ct->ct_error.re_status = RPC_CANTSEND;
			return (-1);
		}
	}
	return (len);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: clnt_tcp.c,v 1.29 2015/11/01 03:45:29 guenther Exp $ */
2
3			/*
4			* Copyright (c) 2010, Oracle America, Inc.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions are
8			* met:
9			*
10			* * Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* * Redistributions in binary form must reproduce the above
13			* copyright notice, this list of conditions and the following
14			* disclaimer in the documentation and/or other materials
15			* provided with the distribution.
16			* * Neither the name of the "Oracle America, Inc." nor the names of its
17			* contributors may be used to endorse or promote products derived
18			* from this software without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21			* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23			* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24			* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25			* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27			* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28			* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29			* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30			* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32			*/
33
34			/*
35			* clnt_tcp.c, Implements a TCP/IP based, client side RPC.
36			*
37			* TCP based RPC supports 'batched calls'.
38			* A sequence of calls may be batched-up in a send buffer. The rpc call
39			* return immediately to the client even though the call was not necessarily
40			* sent. The batching occurs if the results' xdr routine is NULL (0) AND
41			* the rpc timeout value is zero (see clnt.h, rpc).
42			*
43			* Clients should NOT casually batch calls that in fact return results; that is,
44			* the server side should be aware that a call is batched and not produce any
45			* return message. Batched calls that produce many result messages can
46			* deadlock (netlock) the client and the server....
47			*
48			* Now go hang yourself.
49			*/
50
51			#include <stdio.h>
52			#include <stdlib.h>
53			#include <string.h>
54			#include <unistd.h>
55			#include <rpc/rpc.h>
56			#include <sys/socket.h>
57			#include <netdb.h>
58			#include <errno.h>
59			#include <rpc/pmap_clnt.h>
60
61			#define MCALL_MSG_SIZE 24
62
63			static enum clnt_stat clnttcp_call(CLIENT *, u_long, xdrproc_t, caddr_t,
64			xdrproc_t, caddr_t, struct timeval);
65			static void clnttcp_abort(CLIENT *);
66			static void clnttcp_geterr(CLIENT , struct rpc_err );
67			static bool_t clnttcp_freeres(CLIENT *, xdrproc_t, caddr_t);
68			static bool_t clnttcp_control(CLIENT , u_int, void );
69			static void clnttcp_destroy(CLIENT *);
70
71			static struct clnt_ops tcp_ops = {
72			clnttcp_call,
73			clnttcp_abort,
74			clnttcp_geterr,
75			clnttcp_freeres,
76			clnttcp_destroy,
77			clnttcp_control
78			};
79
80			struct ct_data {
81			int ct_sock;
82			bool_t ct_closeit;
83			struct timeval ct_wait;
84			bool_t ct_waitset; /* wait set by clnt_control? */
85			struct sockaddr_in ct_addr;
86			struct rpc_err ct_error;
87			char ct_mcall[MCALL_MSG_SIZE]; /* marshalled callmsg */
88			u_int ct_mpos; /* pos after marshal */
89			XDR ct_xdrs;
90			};
91
92			static int readtcp(struct ct_data *, caddr_t, int);
93			static int writetcp(struct ct_data *, caddr_t, int);
94
95			/*
96			* Create a client handle for a tcp/ip connection.
97			* If sockp<0, sockp is set to a newly created TCP socket and it is
98			* connected to raddr. If *sockp non-negative then
99			* raddr is ignored. The rpc/tcp package does buffering
100			* similar to stdio, so the client must pick send and receive buffer sizes,];
101			* 0 => use the default.
102			* If raddr->sin_port is 0, then a binder on the remote machine is
103			* consulted for the right port number.
104			* NB: *sockp is copied into a private area.
105			* NB: It is the client's responsibility to close *sockp, unless
106			* clnttcp_create() was called with *sockp = -1 (so it created
107			* the socket), and CLNT_DESTROY() is used.
108			* NB: The rpch->cl_auth is set null authentication. Caller may wish to set this
109			* something more useful.
110			*/
111			CLIENT *
112			clnttcp_create(struct sockaddr_in raddr, u_long prog, u_long vers, int sockp,
113			u_int sendsz, u_int recvsz)
114			{
115			CLIENT *h;
116			struct ct_data *ct = NULL;
117			struct timeval now;
118			struct rpc_msg call_msg;
119
120			h = (CLIENT )mem_alloc(sizeof(h));
121			if (h == NULL) {
122			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
123			rpc_createerr.cf_error.re_errno = errno;
124			goto fooy;
125			}
126			ct = (struct ct_data )mem_alloc(sizeof(ct));
127			if (ct == NULL) {
128			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
129			rpc_createerr.cf_error.re_errno = errno;
130			goto fooy;
131			}
132
133			/*
134			* If no port number given ask the pmap for one
135			*/
136			if (raddr->sin_port == 0) {
137			u_short port;
138			if ((port = pmap_getport(raddr, prog, vers, IPPROTO_TCP)) == 0) {
139			mem_free((caddr_t)ct, sizeof(struct ct_data));
140			mem_free((caddr_t)h, sizeof(CLIENT));
141			return (NULL);
142			}
143			raddr->sin_port = htons(port);
144			}
145
146			/*
147			* If no socket given, open one
148			*/
149			if (*sockp < 0) {
150			*sockp = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
151			(void)bindresvport(*sockp, NULL);
152			if ((*sockp < 0)
153			\|\| (connect(sockp, (struct sockaddr )raddr,
154			sizeof(*raddr)) < 0)) {
155			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
156			rpc_createerr.cf_error.re_errno = errno;
157			if (*sockp != -1)
158			(void)close(*sockp);
159			goto fooy;
160			}
161			ct->ct_closeit = TRUE;
162			} else {
163			ct->ct_closeit = FALSE;
164			}
165
166			/*
167			* Set up private data struct
168			*/
169			ct->ct_sock = *sockp;
170			ct->ct_wait.tv_usec = 0;
171			ct->ct_waitset = FALSE;
172			ct->ct_addr = *raddr;
173
174			/*
175			* Initialize call message
176			*/
177			(void)gettimeofday(&now, NULL);
178			call_msg.rm_xid = arc4random();
179			call_msg.rm_direction = CALL;
180			call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
181			call_msg.rm_call.cb_prog = prog;
182			call_msg.rm_call.cb_vers = vers;
183
184			/*
185			* pre-serialize the static part of the call msg and stash it away
186			*/
187			xdrmem_create(&(ct->ct_xdrs), ct->ct_mcall, MCALL_MSG_SIZE,
188			XDR_ENCODE);
189			if (! xdr_callhdr(&(ct->ct_xdrs), &call_msg)) {
190			if (ct->ct_closeit) {
191			(void)close(*sockp);
192			}
193			goto fooy;
194			}
195			ct->ct_mpos = XDR_GETPOS(&(ct->ct_xdrs));
196			XDR_DESTROY(&(ct->ct_xdrs));
197
198			/*
199			* Create a client handle which uses xdrrec for serialization
200			* and authnone for authentication.
201			*/
202			xdrrec_create(&(ct->ct_xdrs), sendsz, recvsz,
203			(caddr_t)ct, (int(*)(caddr_t, caddr_t, int))readtcp,
204			(int(*)(caddr_t, caddr_t, int))writetcp);
205			h->cl_ops = &tcp_ops;
206			h->cl_private = (caddr_t) ct;
207			h->cl_auth = authnone_create();
208			if (h->cl_auth == NULL) {
209			rpc_createerr.cf_stat = RPC_SYSTEMERROR;
210			rpc_createerr.cf_error.re_errno = errno;
211			goto fooy;
212			}
213			return (h);
214
215			fooy:
216			/*
217			* Something goofed, free stuff and barf
218			*/
219			if (ct)
220			mem_free((caddr_t)ct, sizeof(struct ct_data));
221			if (h)
222			mem_free((caddr_t)h, sizeof(CLIENT));
223			return (NULL);
224			}
225			DEF_WEAK(clnttcp_create);
226
227			static enum clnt_stat
228			clnttcp_call(CLIENT *h, u_long proc, xdrproc_t xdr_args, caddr_t args_ptr,
229			xdrproc_t xdr_results, caddr_t results_ptr, struct timeval timeout)
230			{
231			struct ct_data ct = (struct ct_data ) h->cl_private;
232			XDR *xdrs = &(ct->ct_xdrs);
233			struct rpc_msg reply_msg;
234			u_long x_id;
235			u_int32_t msg_x_id = (u_int32_t )(ct->ct_mcall); /* yuk */
236			bool_t shipnow;
237			int refreshes = 2;
238
239			if (!ct->ct_waitset) {
240			ct->ct_wait = timeout;
241			}
242
243			shipnow =
244			(xdr_results == NULL && timeout.tv_sec == 0
245			&& timeout.tv_usec == 0) ? FALSE : TRUE;
246
247			call_again:
248			xdrs->x_op = XDR_ENCODE;
249			ct->ct_error.re_status = RPC_SUCCESS;
250			x_id = ntohl(--(*msg_x_id));
251			if ((! XDR_PUTBYTES(xdrs, ct->ct_mcall, ct->ct_mpos)) \|\|
252			(! XDR_PUTLONG(xdrs, (long *)&proc)) \|\|
253			(! AUTH_MARSHALL(h->cl_auth, xdrs)) \|\|
254			(! (*xdr_args)(xdrs, args_ptr))) {
255			if (ct->ct_error.re_status == RPC_SUCCESS)
256			ct->ct_error.re_status = RPC_CANTENCODEARGS;
257			(void)xdrrec_endofrecord(xdrs, TRUE);
258			return (ct->ct_error.re_status);
259			}
260			if (! xdrrec_endofrecord(xdrs, shipnow))
261			return (ct->ct_error.re_status = RPC_CANTSEND);
262			if (! shipnow)
263			return (RPC_SUCCESS);
264			/*
265			* Hack to provide rpc-based message passing
266			*/
267			if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
268			return(ct->ct_error.re_status = RPC_TIMEDOUT);
269			}
270
271
272			/*
273			* Keep receiving until we get a valid transaction id
274			*/
275			xdrs->x_op = XDR_DECODE;
276			while (TRUE) {
277			reply_msg.acpted_rply.ar_verf = _null_auth;
278			reply_msg.acpted_rply.ar_results.where = NULL;
279			reply_msg.acpted_rply.ar_results.proc = xdr_void;
280			if (! xdrrec_skiprecord(xdrs))
281			return (ct->ct_error.re_status);
282			/* now decode and validate the response header */
283			if (! xdr_replymsg(xdrs, &reply_msg)) {
284			if (ct->ct_error.re_status == RPC_SUCCESS)
285			continue;
286			return (ct->ct_error.re_status);
287			}
288			if (reply_msg.rm_xid == x_id)
289			break;
290			}
291
292			/*
293			* process header
294			*/
295			_seterr_reply(&reply_msg, &(ct->ct_error));
296			if (ct->ct_error.re_status == RPC_SUCCESS) {
297			if (! AUTH_VALIDATE(h->cl_auth, &reply_msg.acpted_rply.ar_verf)) {
298			ct->ct_error.re_status = RPC_AUTHERROR;
299			ct->ct_error.re_why = AUTH_INVALIDRESP;
300			} else if (! (*xdr_results)(xdrs, results_ptr)) {
301			if (ct->ct_error.re_status == RPC_SUCCESS)
302			ct->ct_error.re_status = RPC_CANTDECODERES;
303			}
304			/* free verifier ... */
305			if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
306			xdrs->x_op = XDR_FREE;
307			(void)xdr_opaque_auth(xdrs, &(reply_msg.acpted_rply.ar_verf));
308			}
309			} /* end successful completion */
310			else {
311			/* maybe our credentials need to be refreshed ... */
312			if (refreshes-- && AUTH_REFRESH(h->cl_auth))
313			goto call_again;
314			} /* end of unsuccessful completion */
315			return (ct->ct_error.re_status);
316			}
317
318			static void
319			clnttcp_geterr(CLIENT h, struct rpc_err errp)
320			{
321			struct ct_data *ct =
322			(struct ct_data *) h->cl_private;
323
324			*errp = ct->ct_error;
325			}
326
327			static bool_t
328			clnttcp_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
329			{
330			struct ct_data ct = (struct ct_data )cl->cl_private;
331			XDR *xdrs = &(ct->ct_xdrs);
332
333			xdrs->x_op = XDR_FREE;
334			return ((*xdr_res)(xdrs, res_ptr));
335			}
336
337			static void
338			clnttcp_abort(CLIENT *clnt)
339			{
340			}
341
342			static bool_t
343			clnttcp_control(CLIENT cl, u_int request, void info)
344			{
345			struct ct_data ct = (struct ct_data )cl->cl_private;
346
347			switch (request) {
348			case CLSET_TIMEOUT:
349			ct->ct_wait = (struct timeval )info;
350			ct->ct_waitset = TRUE;
351			break;
352			case CLGET_TIMEOUT:
353			(struct timeval )info = ct->ct_wait;
354			break;
355			case CLGET_SERVER_ADDR:
356			(struct sockaddr_in )info = ct->ct_addr;
357			break;
358			default:
359			return (FALSE);
360			}
361			return (TRUE);
362			}
363
364
365			static void
366			clnttcp_destroy(CLIENT *h)
367			{
368			struct ct_data *ct =
369			(struct ct_data *) h->cl_private;
370
371			if (ct->ct_closeit && ct->ct_sock != -1) {
372			(void)close(ct->ct_sock);
373			}
374			XDR_DESTROY(&(ct->ct_xdrs));
375			mem_free((caddr_t)ct, sizeof(struct ct_data));
376			mem_free((caddr_t)h, sizeof(CLIENT));
377			}
378
379			/*
380			* Interface between xdr serializer and tcp connection.
381			* Behaves like the system calls, read & write, but keeps some error state
382			* around for the rpc level.
383			*/
384			static int
385			readtcp(struct ct_data *ct, caddr_t buf, int len)
386			{
387			struct pollfd pfd[1];
388			struct timeval start, after, duration, tmp;
389			int delta, r, save_errno;
390
391			if (len == 0)
392			return (0);
393
394			pfd[0].fd = ct->ct_sock;
395			pfd[0].events = POLLIN;
396			delta = ct->ct_wait.tv_sec * 1000 + ct->ct_wait.tv_usec / 1000;
397			gettimeofday(&start, NULL);
398			for (;;) {
399			r = poll(pfd, 1, delta);
400			save_errno = errno;
401
402			gettimeofday(&after, NULL);
403			timersub(&start, &after, &duration);
404			timersub(&ct->ct_wait, &duration, &tmp);
405			delta = tmp.tv_sec * 1000 + tmp.tv_usec / 1000;
406			if (delta <= 0)
407			r = 0;
408
409			switch (r) {
410			case 0:
411			ct->ct_error.re_status = RPC_TIMEDOUT;
412			return (-1);
413			case 1:
414			if (pfd[0].revents & POLLNVAL)
415			errno = EBADF;
416			else if (pfd[0].revents & POLLERR)
417			errno = EIO;
418			else
419			break;
420			/* FALLTHROUGH */
421			case -1:
422			if (errno == EINTR)
423			continue;
424			ct->ct_error.re_status = RPC_CANTRECV;
425			ct->ct_error.re_errno = save_errno;
426			return (-1);
427			}
428			break;
429			}
430
431			switch (len = read(ct->ct_sock, buf, len)) {
432			case 0:
433			/* premature eof */
434			ct->ct_error.re_errno = ECONNRESET;
435			ct->ct_error.re_status = RPC_CANTRECV;
436			len = -1; /* it's really an error */
437			break;
438			case -1:
439			ct->ct_error.re_errno = errno;
440			ct->ct_error.re_status = RPC_CANTRECV;
441			break;
442			}
443			return (len);
444			}
445
446			static int
447			writetcp(struct ct_data *ct, caddr_t buf, int len)
448			{
449			int i, cnt;
450
451			for (cnt = len; cnt > 0; cnt -= i, buf += i) {
452			if ((i = write(ct->ct_sock, buf, cnt)) == -1) {
453			ct->ct_error.re_errno = errno;
454			ct->ct_error.re_status = RPC_CANTSEND;
455			return (-1);
456			}
457			}
458			return (len);
459			}