* 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
* 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.
* Mountain View, California 94043
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)clnt_udp.c 1.39 87/08/11 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)clnt_udp.c 2.2 88/08/01 4.0 RPCSRC";*/
static char *rcsid
= "$Id: clnt_udp.c,v 1.3 1993/08/26 00:53:21 jtc Exp $";
* clnt_udp.c, Implements a UDP/IP based, client side RPC.
* Copyright (C) 1984, Sun Microsystems, Inc.
#include <rpc/pmap_clnt.h>
* UDP bases client side rpc operations
static enum clnt_stat
clntudp_call();
static void clntudp_abort();
static void clntudp_geterr();
static bool_t
clntudp_freeres();
static bool_t
clntudp_control();
static void clntudp_destroy();
static struct clnt_ops udp_ops
= {
* Private data kept per client handle
struct sockaddr_in cu_raddr
;
* Create a UDP based client handle.
* If *sockp<0, *sockp is set to a newly created UPD socket.
* If raddr->sin_port is 0 a binder on the remote machine
* is consulted for the correct port number.
* NB: It is the clients responsibility to close *sockp.
* NB: The rpch->cl_auth is initialized to null authentication.
* Caller may wish to set this something more useful.
* wait is the amount of time used between retransmitting a call if
* no response has been heard; retransmition occurs until the actual
* sendsz and recvsz are the maximum allowable packet sizes that can be
clntudp_bufcreate(raddr
, program
, version
, wait
, sockp
, sendsz
, recvsz
)
struct sockaddr_in
*raddr
;
register struct cu_data
*cu
;
cl
= (CLIENT
*)mem_alloc(sizeof(CLIENT
));
(void) fprintf(stderr
, "clntudp_create: out of memory\n");
rpc_createerr
.cf_stat
= RPC_SYSTEMERROR
;
rpc_createerr
.cf_error
.re_errno
= errno
;
sendsz
= ((sendsz
+ 3) / 4) * 4;
recvsz
= ((recvsz
+ 3) / 4) * 4;
cu
= (struct cu_data
*)mem_alloc(sizeof(*cu
) + sendsz
+ recvsz
);
(void) fprintf(stderr
, "clntudp_create: out of memory\n");
rpc_createerr
.cf_stat
= RPC_SYSTEMERROR
;
rpc_createerr
.cf_error
.re_errno
= errno
;
cu
->cu_outbuf
= &cu
->cu_inbuf
[recvsz
];
(void)gettimeofday(&now
, (struct timezone
*)0);
if (raddr
->sin_port
== 0) {
pmap_getport(raddr
, program
, version
, IPPROTO_UDP
)) == 0) {
raddr
->sin_port
= htons(port
);
cl
->cl_private
= (caddr_t
)cu
;
cu
->cu_rlen
= sizeof (cu
->cu_raddr
);
cu
->cu_total
.tv_sec
= -1;
cu
->cu_total
.tv_usec
= -1;
call_msg
.rm_xid
= getpid() ^ now
.tv_sec
^ now
.tv_usec
;
call_msg
.rm_direction
= CALL
;
call_msg
.rm_call
.cb_rpcvers
= RPC_MSG_VERSION
;
call_msg
.rm_call
.cb_prog
= program
;
call_msg
.rm_call
.cb_vers
= version
;
xdrmem_create(&(cu
->cu_outxdrs
), cu
->cu_outbuf
,
if (! xdr_callhdr(&(cu
->cu_outxdrs
), &call_msg
)) {
cu
->cu_xdrpos
= XDR_GETPOS(&(cu
->cu_outxdrs
));
*sockp
= socket(AF_INET
, SOCK_DGRAM
, IPPROTO_UDP
);
rpc_createerr
.cf_stat
= RPC_SYSTEMERROR
;
rpc_createerr
.cf_error
.re_errno
= errno
;
/* attempt to bind to prov port */
(void)bindresvport(*sockp
, (struct sockaddr_in
*)0);
/* the sockets rpc controls are non-blocking */
(void)ioctl(*sockp
, FIONBIO
, (char *) &dontblock
);
cl
->cl_auth
= authnone_create();
mem_free((caddr_t
)cu
, sizeof(*cu
) + sendsz
+ recvsz
);
mem_free((caddr_t
)cl
, sizeof(CLIENT
));
clntudp_create(raddr
, program
, version
, wait
, sockp
)
struct sockaddr_in
*raddr
;
return(clntudp_bufcreate(raddr
, program
, version
, wait
, sockp
,
UDPMSGSIZE
, UDPMSGSIZE
));
clntudp_call(cl
, proc
, xargs
, argsp
, xresults
, resultsp
, utimeout
)
register CLIENT
*cl
; /* client handle */
u_long proc
; /* procedure number */
xdrproc_t xargs
; /* xdr routine for args */
caddr_t argsp
; /* pointer to args */
xdrproc_t xresults
; /* xdr routine for results */
caddr_t resultsp
; /* pointer to results */
struct timeval utimeout
; /* seconds to wait before giving up */
register struct cu_data
*cu
= (struct cu_data
*)cl
->cl_private
;
#endif /* def FD_SETSIZE */
struct rpc_msg reply_msg
;
struct timeval time_waited
;
int nrefreshes
= 2; /* number of times to refresh cred */
if (cu
->cu_total
.tv_usec
== -1) {
timeout
= utimeout
; /* use supplied timeout */
timeout
= cu
->cu_total
; /* use default timeout */
xdrs
= &(cu
->cu_outxdrs
);
XDR_SETPOS(xdrs
, cu
->cu_xdrpos
);
* the transaction is the first thing in the out buffer
(*(u_short
*)(cu
->cu_outbuf
))++;
if ((! XDR_PUTLONG(xdrs
, (long *)&proc
)) ||
(! AUTH_MARSHALL(cl
->cl_auth
, xdrs
)) ||
(! (*xargs
)(xdrs
, argsp
)))
return (cu
->cu_error
.re_status
= RPC_CANTENCODEARGS
);
outlen
= (int)XDR_GETPOS(xdrs
);
if (sendto(cu
->cu_sock
, cu
->cu_outbuf
, outlen
, 0,
(struct sockaddr
*)&(cu
->cu_raddr
), cu
->cu_rlen
)
cu
->cu_error
.re_errno
= errno
;
return (cu
->cu_error
.re_status
= RPC_CANTSEND
);
* Hack to provide rpc-based message passing
if (timeout
.tv_sec
== 0 && timeout
.tv_usec
== 0) {
return (cu
->cu_error
.re_status
= RPC_TIMEDOUT
);
* 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
;
FD_SET(cu
->cu_sock
, &mask
);
#endif /* def FD_SETSIZE */
switch (select(_rpc_dtablesize(), &readfds
, (int *)NULL
,
(int *)NULL
, &(cu
->cu_wait
))) {
time_waited
.tv_sec
+= cu
->cu_wait
.tv_sec
;
time_waited
.tv_usec
+= cu
->cu_wait
.tv_usec
;
while (time_waited
.tv_usec
>= 1000000) {
time_waited
.tv_usec
-= 1000000;
if ((time_waited
.tv_sec
< timeout
.tv_sec
) ||
((time_waited
.tv_sec
== timeout
.tv_sec
) &&
(time_waited
.tv_usec
< timeout
.tv_usec
)))
return (cu
->cu_error
.re_status
= RPC_TIMEDOUT
);
* buggy in other cases because time_waited is not being
cu
->cu_error
.re_errno
= errno
;
return (cu
->cu_error
.re_status
= RPC_CANTRECV
);
fromlen
= sizeof(struct sockaddr
);
inlen
= recvfrom(cu
->cu_sock
, cu
->cu_inbuf
,
(struct sockaddr
*)&from
, &fromlen
);
} while (inlen
< 0 && errno
== EINTR
);
if (errno
== EWOULDBLOCK
)
cu
->cu_error
.re_errno
= errno
;
return (cu
->cu_error
.re_status
= RPC_CANTRECV
);
if (inlen
< sizeof(u_long
))
/* see if reply transaction id matches sent id */
if (*((u_long
*)(cu
->cu_inbuf
)) != *((u_long
*)(cu
->cu_outbuf
)))
/* we now assume we have the proper reply */
* now decode and validate the response
xdrmem_create(&reply_xdrs
, cu
->cu_inbuf
, (u_int
)inlen
, XDR_DECODE
);
ok
= xdr_replymsg(&reply_xdrs
, &reply_msg
);
/* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */
_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
) {
(void)xdr_opaque_auth(xdrs
,
&(reply_msg
.acpted_rply
.ar_verf
));
} /* end successful completion */
/* maybe our credentials need to be refreshed ... */
if (nrefreshes
> 0 && AUTH_REFRESH(cl
->cl_auth
)) {
} /* end of unsuccessful completion */
} /* end of valid reply message */
cu
->cu_error
.re_status
= RPC_CANTDECODERES
;
return (cu
->cu_error
.re_status
);
register struct cu_data
*cu
= (struct cu_data
*)cl
->cl_private
;
clntudp_freeres(cl
, xdr_res
, res_ptr
)
register struct cu_data
*cu
= (struct cu_data
*)cl
->cl_private
;
register XDR
*xdrs
= &(cu
->cu_outxdrs
);
return ((*xdr_res
)(xdrs
, res_ptr
));
clntudp_control(cl
, request
, info
)
register struct cu_data
*cu
= (struct cu_data
*)cl
->cl_private
;
cu
->cu_total
= *(struct timeval
*)info
;
*(struct timeval
*)info
= cu
->cu_total
;
case CLSET_RETRY_TIMEOUT
:
cu
->cu_wait
= *(struct timeval
*)info
;
case CLGET_RETRY_TIMEOUT
:
*(struct timeval
*)info
= cu
->cu_wait
;
*(struct sockaddr_in
*)info
= cu
->cu_raddr
;
register struct cu_data
*cu
= (struct cu_data
*)cl
->cl_private
;
(void)close(cu
->cu_sock
);
XDR_DESTROY(&(cu
->cu_outxdrs
));
mem_free((caddr_t
)cu
, (sizeof(*cu
) + cu
->cu_sendsz
+ cu
->cu_recvsz
));
mem_free((caddr_t
)cl
, sizeof(CLIENT
));