* 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: @(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";*/
static char *rcsid
= "$Id: svc_tcp.c,v 1.3 1993/08/26 00:53:44 jtc Exp $";
* svc_tcp.c, Server side for TCP/IP based RPC.
* Copyright (C) 1984, Sun Microsystems, Inc.
* Actually implements two flavors of transporter -
* a tcp rendezvouser (a listner and connection establisher)
* and a record/tcp stream.
* Ops vector for TCP/IP based rpc service handle
static bool_t
svctcp_recv();
static enum xprt_stat
svctcp_stat();
static bool_t
svctcp_getargs();
static bool_t
svctcp_reply();
static bool_t
svctcp_freeargs();
static void svctcp_destroy();
static struct xp_ops svctcp_op
= {
* Ops vector for TCP/IP rendezvous handler
static bool_t
rendezvous_request();
static enum xprt_stat
rendezvous_stat();
static struct xp_ops svctcp_rendezvous_op
= {
static int readtcp(), writetcp();
static SVCXPRT
*makefd_xprt();
struct tcp_rendezvous
{ /* kept in xprt->xp_p1 */
struct tcp_conn
{ /* kept in xprt->xp_p1 */
enum xprt_stat strm_stat
;
char verf_body
[MAX_AUTH_BYTES
];
* xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
* Creates, registers, and returns a (rpc) tcp based transporter.
* Once *xprt is initialized, it is registered as a transporter
* see (svc.h, xprt_register). This routine returns
* a NULL if a problem occurred.
* If sock<0 then a socket is created, else sock is used.
* If the socket, sock is not bound to a port then svctcp_create
* binds it to an arbitrary port. The routine then starts a tcp
* listener on the socket's associated port. In any (successful) case,
* xprt->xp_sock is the registered socket number and xprt->xp_port is the
* associated port number.
* Since tcp streams do buffered io similar to stdio, the caller can specify
* how big the send and receive buffers are via the second and third parms;
* 0 => use the system default.
svctcp_create(sock
, sendsize
, recvsize
)
register struct tcp_rendezvous
*r
;
int len
= sizeof(struct sockaddr_in
);
if (sock
== RPC_ANYSOCK
) {
if ((sock
= socket(AF_INET
, SOCK_STREAM
, IPPROTO_TCP
)) < 0) {
perror("svctcp_.c - udp socket creation problem");
return ((SVCXPRT
*)NULL
);
bzero((char *)&addr
, sizeof (addr
));
addr
.sin_family
= AF_INET
;
if (bindresvport(sock
, &addr
)) {
(void)bind(sock
, (struct sockaddr
*)&addr
, len
);
if ((getsockname(sock
, (struct sockaddr
*)&addr
, &len
) != 0) ||
(listen(sock
, 2) != 0)) {
perror("svctcp_.c - cannot getsockname or listen");
return ((SVCXPRT
*)NULL
);
r
= (struct tcp_rendezvous
*)mem_alloc(sizeof(*r
));
(void) fprintf(stderr
, "svctcp_create: out of memory\n");
xprt
= (SVCXPRT
*)mem_alloc(sizeof(SVCXPRT
));
(void) fprintf(stderr
, "svctcp_create: out of memory\n");
xprt
->xp_p1
= (caddr_t
)r
;
xprt
->xp_verf
= _null_auth
;
xprt
->xp_ops
= &svctcp_rendezvous_op
;
xprt
->xp_port
= ntohs(addr
.sin_port
);
* Like svtcp_create(), except the routine takes any *open* UNIX file
* descriptor as its first input.
svcfd_create(fd
, sendsize
, recvsize
)
return (makefd_xprt(fd
, sendsize
, recvsize
));
makefd_xprt(fd
, sendsize
, recvsize
)
register struct tcp_conn
*cd
;
xprt
= (SVCXPRT
*)mem_alloc(sizeof(SVCXPRT
));
if (xprt
== (SVCXPRT
*)NULL
) {
(void) fprintf(stderr
, "svc_tcp: makefd_xprt: out of memory\n");
cd
= (struct tcp_conn
*)mem_alloc(sizeof(struct tcp_conn
));
if (cd
== (struct tcp_conn
*)NULL
) {
(void) fprintf(stderr
, "svc_tcp: makefd_xprt: out of memory\n");
mem_free((char *) xprt
, sizeof(SVCXPRT
));
cd
->strm_stat
= XPRT_IDLE
;
xdrrec_create(&(cd
->xdrs
), sendsize
, recvsize
,
(caddr_t
)xprt
, readtcp
, writetcp
);
xprt
->xp_p1
= (caddr_t
)cd
;
xprt
->xp_verf
.oa_base
= cd
->verf_body
;
xprt
->xp_ops
= &svctcp_op
; /* truely deals with calls */
xprt
->xp_port
= 0; /* this is a connection, not a rendezvouser */
struct tcp_rendezvous
*r
;
r
= (struct tcp_rendezvous
*)xprt
->xp_p1
;
len
= sizeof(struct sockaddr_in
);
if ((sock
= accept(xprt
->xp_sock
, (struct sockaddr
*)&addr
,
* make a new transporter (re-uses xprt)
xprt
= makefd_xprt(sock
, r
->sendsize
, r
->recvsize
);
return (FALSE
); /* there is never an rpc msg to be processed */
register struct tcp_conn
*cd
= (struct tcp_conn
*)xprt
->xp_p1
;
(void)close(xprt
->xp_sock
);
if (xprt
->xp_port
!= 0) {
/* a rendezvouser socket */
/* an actual connection socket */
XDR_DESTROY(&(cd
->xdrs
));
mem_free((caddr_t
)cd
, sizeof(struct tcp_conn
));
mem_free((caddr_t
)xprt
, sizeof(SVCXPRT
));
* All read operations timeout after 35 seconds.
* A timeout is fatal for the connection.
static struct timeval wait_per_try
= { 35, 0 };
* reads data from the tcp conection.
* any error is fatal and the connection is closed.
* (And a read of zero bytes is a half closed stream => error.)
register int sock
= xprt
->xp_sock
;
register int mask
= 1 << sock
;
#endif /* def FD_SETSIZE */
if (select(_rpc_dtablesize(), &readfds
, (int*)NULL
, (int*)NULL
,
} while (!FD_ISSET(sock
, &readfds
));
} while (readfds
!= mask
);
#endif /* def FD_SETSIZE */
if ((len
= read(sock
, buf
, len
)) > 0) {
((struct tcp_conn
*)(xprt
->xp_p1
))->strm_stat
= XPRT_DIED
;
* writes data to the tcp connection.
* Any error is fatal and the connection is closed.
for (cnt
= len
; cnt
> 0; cnt
-= i
, buf
+= i
) {
if ((i
= write(xprt
->xp_sock
, buf
, cnt
)) < 0) {
((struct tcp_conn
*)(xprt
->xp_p1
))->strm_stat
=
register struct tcp_conn
*cd
=
(struct tcp_conn
*)(xprt
->xp_p1
);
if (cd
->strm_stat
== XPRT_DIED
)
if (! xdrrec_eof(&(cd
->xdrs
)))
register struct rpc_msg
*msg
;
register struct tcp_conn
*cd
=
(struct tcp_conn
*)(xprt
->xp_p1
);
register XDR
*xdrs
= &(cd
->xdrs
);
(void)xdrrec_skiprecord(xdrs
);
if (xdr_callmsg(xdrs
, msg
)) {
svctcp_getargs(xprt
, xdr_args
, args_ptr
)
return ((*xdr_args
)(&(((struct tcp_conn
*)(xprt
->xp_p1
))->xdrs
), args_ptr
));
svctcp_freeargs(xprt
, xdr_args
, args_ptr
)
&(((struct tcp_conn
*)(xprt
->xp_p1
))->xdrs
);
return ((*xdr_args
)(xdrs
, args_ptr
));
register struct rpc_msg
*msg
;
register struct tcp_conn
*cd
=
(struct tcp_conn
*)(xprt
->xp_p1
);
register XDR
*xdrs
= &(cd
->xdrs
);
stat
= xdr_replymsg(xdrs
, msg
);
(void)xdrrec_endofrecord(xdrs
, TRUE
);