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amitcp-3.0ß2.lha
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AmiTCP
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rpclib
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clnt_tcp.c
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C/C++ Source or Header
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1994-03-09
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13KB
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507 lines
/*
* $Id: clnt_tcp.c,v 1.2 1993/11/10 01:46:31 jraja Exp $
*
* $Log: clnt_tcp.c,v $
* Revision 1.2 1993/11/10 01:46:31 jraja
* Fixed includes, added ANSI prototypes.
* Fixed various types.
* Added AMIGA specific includes.
* Changed close() to CloseSocket() for the AMITCP.
* Changed read() to recv() and write() to send() for portability.
* Removed EINTR handling for the AMITCP (lets CTRL-C come through).
*
*/
/* @(#)clnt_tcp.c 2.2 88/08/01 4.0 RPCSRC */
/*
* 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
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)clnt_tcp.c 1.37 87/10/05 Copyr 1984 Sun Micro";
#endif
/*
* clnt_tcp.c, Implements a TCP/IP based, client side RPC.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*
* TCP based RPC supports 'batched calls'.
* A sequence of calls may be batched-up in a send buffer. The rpc call
* return immediately to the client even though the call was not necessarily
* sent. The batching occurs if the results' xdr routine is NULL (0) AND
* the rpc timeout value is zero (see clnt.h, rpc).
*
* Clients should NOT casually batch calls that in fact return results; that is,
* the server side should be aware that a call is batched and not produce any
* return message. Batched calls that produce many result messages can
* deadlock (netlock) the client and the server....
*
* Now go hang yourself.
*/
#include <sys/param.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <rpc/pmap_clnt.h>
#include <stdio.h>
#ifdef AMIGA
#include <proto/exec.h>
#endif
#define MCALL_MSG_SIZE 24
static int readtcp(struct ct_data * ct, caddr_t buf, int len);
static int writetcp(struct ct_data * ct, caddr_t buf, int len);
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);
static void clnttcp_abort(CLIENT * h);
static void clnttcp_geterr(CLIENT * h, struct rpc_err * errp);
static bool_t clnttcp_freeres(CLIENT * cl,
xdrproc_t xdr_res, caddr_t res_ptr);
static bool_t clnttcp_control(CLIENT * cl,
u_int request, caddr_t info);
static void clnttcp_destroy(CLIENT * h);
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;
};
/*
* 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 clients responsibility to close *sockp.
* NB: The rpch->cl_auth is set null authentication. Caller may wish to set this
* something more useful.
*/
CLIENT *
clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz)
struct sockaddr_in *raddr;
u_long prog;
u_long vers;
register int *sockp;
u_int sendsz;
u_int recvsz;
{
CLIENT *h;
register struct ct_data *ct = NULL;
struct timeval now;
struct rpc_msg call_msg;
h = (CLIENT *)mem_alloc(sizeof(*h));
if (h == NULL) {
(void)fprintf(stderr, "clnttcp_create: out of memory\n");
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) {
(void)fprintf(stderr, "clnttcp_create: out of memory\n");
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) {
goto fooy;
}
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, (struct sockaddr_in *)0);
if ((*sockp < 0)
|| (connect(*sockp, (struct sockaddr *)raddr,
sizeof(*raddr)) < 0)) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
#ifdef AMITCP
(void)CloseSocket(*sockp);
#else
(void)close(*sockp);
#endif
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);
#ifdef AMIGA
call_msg.rm_xid = (u_long)FindTask(NULL) ^ now.tv_sec ^ now.tv_usec;
#else
call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
#endif
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) {
#ifdef AMITCP
(void)CloseSocket(*sockp);
#else
(void)close(*sockp);
#endif
}
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,
ct, readtcp, writetcp);
h->cl_ops = &tcp_ops;
h->cl_private = (caddr_t) ct;
h->cl_auth = authnone_create();
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 ((CLIENT *)NULL);
}
static enum clnt_stat
clnttcp_call(h, proc, xdr_args, args_ptr, xdr_results, results_ptr, timeout)
register CLIENT *h;
u_long proc;
xdrproc_t xdr_args;
caddr_t args_ptr;
xdrproc_t xdr_results;
caddr_t results_ptr;
struct timeval timeout;
{
register struct ct_data *ct = (struct ct_data *) h->cl_private;
register XDR *xdrs = &(ct->ct_xdrs);
struct rpc_msg reply_msg;
u_long x_id;
u_long *msg_x_id = (u_long *)(ct->ct_mcall); /* yuk */
register bool_t shipnow;
int refreshes = 2;
if (!ct->ct_waitset) {
ct->ct_wait = timeout;
}
shipnow =
(xdr_results == (xdrproc_t)0 && timeout.tv_sec == 0
&& timeout.tv_usec == 0) ? FALSE : TRUE;
call_again:
xdrs->x_op = XDR_ENCODE;
ct->ct_error.