1 /* @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC */
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31 static char sccsid
[] = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
35 * svc_tcp.c, Server side for TCP/IP based RPC.
37 * Copyright (C) 1984, Sun Microsystems, Inc.
39 * Actually implements two flavors of transporter -
40 * a tcp rendezvouser (a listener and connection establisher)
41 * and a record/tcp stream.
51 #include <sys/socket.h>
58 # include <libio/iolibio.h>
59 # define fputs(s, f) _IO_fputs (s, f)
64 * Ops vector for TCP/IP based rpc service handle
66 static bool_t
svctcp_recv (SVCXPRT
*, struct rpc_msg
*);
67 static enum xprt_stat
svctcp_stat (SVCXPRT
*);
68 static bool_t
svctcp_getargs (SVCXPRT
*, xdrproc_t
, caddr_t
);
69 static bool_t
svctcp_reply (SVCXPRT
*, struct rpc_msg
*);
70 static bool_t
svctcp_freeargs (SVCXPRT
*, xdrproc_t
, caddr_t
);
71 static void svctcp_destroy (SVCXPRT
*);
73 static const struct xp_ops svctcp_op
=
84 * Ops vector for TCP/IP rendezvous handler
86 static bool_t
rendezvous_request (SVCXPRT
*, struct rpc_msg
*);
87 static enum xprt_stat
rendezvous_stat (SVCXPRT
*);
88 static void svctcp_rendezvous_abort (void) attribute_noreturn
;
90 /* This function makes sure abort() relocation goes through PLT
91 and thus can be lazy bound. */
93 svctcp_rendezvous_abort (void)
98 static const struct xp_ops svctcp_rendezvous_op
=
102 (bool_t (*) (SVCXPRT
*, xdrproc_t
, caddr_t
)) svctcp_rendezvous_abort
,
103 (bool_t (*) (SVCXPRT
*, struct rpc_msg
*)) svctcp_rendezvous_abort
,
104 (bool_t (*) (SVCXPRT
*, xdrproc_t
, caddr_t
)) svctcp_rendezvous_abort
,
108 static int readtcp (char*, char *, int);
109 static int writetcp (char *, char *, int);
110 static SVCXPRT
*makefd_xprt (int, u_int
, u_int
) internal_function
;
112 struct tcp_rendezvous
113 { /* kept in xprt->xp_p1 */
119 { /* kept in xprt->xp_p1 */
120 enum xprt_stat strm_stat
;
123 char verf_body
[MAX_AUTH_BYTES
];
128 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
130 * Creates, registers, and returns a (rpc) tcp based transporter.
131 * Once *xprt is initialized, it is registered as a transporter
132 * see (svc.h, xprt_register). This routine returns
133 * a NULL if a problem occurred.
135 * If sock<0 then a socket is created, else sock is used.
136 * If the socket, sock is not bound to a port then svctcp_create
137 * binds it to an arbitrary port. The routine then starts a tcp
138 * listener on the socket's associated port. In any (successful) case,
139 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
140 * associated port number.
142 * Since tcp streams do buffered io similar to stdio, the caller can specify
143 * how big the send and receive buffers are via the second and third parms;
144 * 0 => use the system default.
147 svctcp_create (int sock
, u_int sendsize
, u_int recvsize
)
149 bool_t madesock
= FALSE
;
151 struct tcp_rendezvous
*r
;
152 struct sockaddr_in addr
;
153 socklen_t len
= sizeof (struct sockaddr_in
);
155 if (sock
== RPC_ANYSOCK
)
157 if ((sock
= socket (AF_INET
, SOCK_STREAM
, IPPROTO_TCP
)) < 0)
159 perror (_("svc_tcp.c - tcp socket creation problem"));
160 return (SVCXPRT
*) NULL
;
164 memset ((char *) &addr
, 0, sizeof (addr
));
165 addr
.sin_family
= AF_INET
;
166 if (bindresvport (sock
, &addr
))
169 (void) bind (sock
, (struct sockaddr
*) &addr
, len
);
171 if ((getsockname (sock
, (struct sockaddr
*) &addr
, &len
) != 0) ||
172 (listen (sock
, 2) != 0))
174 perror (_("svc_tcp.c - cannot getsockname or listen"));
177 return (SVCXPRT
*) NULL
;
179 r
= (struct tcp_rendezvous
*) mem_alloc (sizeof (*r
));
180 xprt
= (SVCXPRT
*) mem_alloc (sizeof (SVCXPRT
));
181 if (r
== NULL
|| xprt
== NULL
)
184 if (_IO_fwide (stderr
, 0) > 0)
185 (void) __fwprintf (stderr
, L
"%s", _("svctcp_create: out of memory\n"));
188 (void) fputs (_("svctcp_create: out of memory\n"), stderr
);
189 mem_free (r
, sizeof (*r
));
190 mem_free (xprt
, sizeof (SVCXPRT
));
193 r
->sendsize
= sendsize
;
194 r
->recvsize
= recvsize
;
196 xprt
->xp_p1
= (caddr_t
) r
;
197 xprt
->xp_verf
= _null_auth
;
198 xprt
->xp_ops
= &svctcp_rendezvous_op
;
199 xprt
->xp_port
= ntohs (addr
.sin_port
);
200 xprt
->xp_sock
= sock
;
201 xprt_register (xprt
);
206 * Like svtcp_create(), except the routine takes any *open* UNIX file
207 * descriptor as its first input.
210 svcfd_create (int fd
, u_int sendsize
, u_int recvsize
);
212 svcfd_create (int fd
, u_int sendsize
, u_int recvsize
)
214 return makefd_xprt (fd
, sendsize
, recvsize
);
219 makefd_xprt (int fd
, u_int sendsize
, u_int recvsize
)
224 xprt
= (SVCXPRT
*) mem_alloc (sizeof (SVCXPRT
));
225 cd
= (struct tcp_conn
*) mem_alloc (sizeof (struct tcp_conn
));
226 if (xprt
== (SVCXPRT
*) NULL
|| cd
== NULL
)
229 if (_IO_fwide (stderr
, 0) > 0)
230 (void) __fwprintf (stderr
, L
"%s",
231 _("svc_tcp: makefd_xprt: out of memory\n"));
234 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr
);
235 mem_free (xprt
, sizeof (SVCXPRT
));
236 mem_free (cd
, sizeof (struct tcp_conn
));
239 cd
->strm_stat
= XPRT_IDLE
;
240 xdrrec_create (&(cd
->xdrs
), sendsize
, recvsize
,
241 (caddr_t
) xprt
, readtcp
, writetcp
);
243 xprt
->xp_p1
= (caddr_t
) cd
;
244 xprt
->xp_verf
.oa_base
= cd
->verf_body
;
245 xprt
->xp_addrlen
= 0;
246 xprt
->xp_ops
= &svctcp_op
; /* truly deals with calls */
247 xprt
->xp_port
= 0; /* this is a connection, not a rendezvouser */
249 xprt_register (xprt
);
254 rendezvous_request (SVCXPRT
*xprt
, struct rpc_msg
*errmsg attribute_unused
)
257 struct tcp_rendezvous
*r
;
258 struct sockaddr_in addr
;
261 r
= (struct tcp_rendezvous
*) xprt
->xp_p1
;
263 len
= sizeof (struct sockaddr_in
);
264 if ((sock
= accept (xprt
->xp_sock
, (struct sockaddr
*) &addr
, &len
)) < 0)
271 * make a new transporter (re-uses xprt)
273 xprt
= makefd_xprt (sock
, r
->sendsize
, r
->recvsize
);
274 memcpy (&xprt
->xp_raddr
, &addr
, sizeof (addr
));
275 xprt
->xp_addrlen
= len
;
276 return FALSE
; /* there is never an rpc msg to be processed */
279 static enum xprt_stat
280 rendezvous_stat (SVCXPRT
*xprt attribute_unused
)
286 svctcp_destroy (SVCXPRT
*xprt
)
288 struct tcp_conn
*cd
= (struct tcp_conn
*) xprt
->xp_p1
;
290 xprt_unregister (xprt
);
291 (void) close (xprt
->xp_sock
);
292 if (xprt
->xp_port
!= 0)
294 /* a rendezvouser socket */
299 /* an actual connection socket */
300 XDR_DESTROY (&(cd
->xdrs
));
302 mem_free ((caddr_t
) cd
, sizeof (struct tcp_conn
));
303 mem_free ((caddr_t
) xprt
, sizeof (SVCXPRT
));
308 * reads data from the tcp connection.
309 * any error is fatal and the connection is closed.
310 * (And a read of zero bytes is a half closed stream => error.)
313 readtcp (char *xprtptr
, char *buf
, int len
)
315 SVCXPRT
*xprt
= (SVCXPRT
*)xprtptr
;
316 int sock
= xprt
->xp_sock
;
317 int milliseconds
= 35 * 1000;
318 struct pollfd pollfd
;
323 pollfd
.events
= POLLIN
;
324 switch (poll (&pollfd
, 1, milliseconds
))
333 if ((pollfd
.revents
& POLLERR
) || (pollfd
.revents
& POLLHUP
)
334 || (pollfd
.revents
& POLLNVAL
))
339 while ((pollfd
.revents
& POLLIN
) == 0);
341 if ((len
= read (sock
, buf
, len
)) > 0)
345 ((struct tcp_conn
*) (xprt
->xp_p1
))->strm_stat
= XPRT_DIED
;
350 * writes data to the tcp connection.
351 * Any error is fatal and the connection is closed.
354 writetcp (char *xprtptr
, char * buf
, int len
)
356 SVCXPRT
*xprt
= (SVCXPRT
*)xprtptr
;
359 for (cnt
= len
; cnt
> 0; cnt
-= i
, buf
+= i
)
361 if ((i
= write (xprt
->xp_sock
, buf
, cnt
)) < 0)
363 ((struct tcp_conn
*) (xprt
->xp_p1
))->strm_stat
= XPRT_DIED
;
370 static enum xprt_stat
371 svctcp_stat (SVCXPRT
*xprt
)
373 struct tcp_conn
*cd
=
374 (struct tcp_conn
*) (xprt
->xp_p1
);
376 if (cd
->strm_stat
== XPRT_DIED
)
378 if (!xdrrec_eof (&(cd
->xdrs
)))
379 return XPRT_MOREREQS
;
384 svctcp_recv (SVCXPRT
*xprt
, struct rpc_msg
*msg
)
386 struct tcp_conn
*cd
= (struct tcp_conn
*) (xprt
->xp_p1
);
387 XDR
*xdrs
= &(cd
->xdrs
);
389 xdrs
->x_op
= XDR_DECODE
;
390 (void) xdrrec_skiprecord (xdrs
);
391 if (xdr_callmsg (xdrs
, msg
))
393 cd
->x_id
= msg
->rm_xid
;
396 cd
->strm_stat
= XPRT_DIED
; /* XXXX */
401 svctcp_getargs (SVCXPRT
*xprt
, xdrproc_t xdr_args
, caddr_t args_ptr
)
403 return ((*xdr_args
) (&(((struct tcp_conn
*)
404 (xprt
->xp_p1
))->xdrs
), args_ptr
));
408 svctcp_freeargs (SVCXPRT
*xprt
, xdrproc_t xdr_args
, caddr_t args_ptr
)
410 XDR
*xdrs
= &(((struct tcp_conn
*) (xprt
->xp_p1
))->xdrs
);
412 xdrs
->x_op
= XDR_FREE
;
413 return ((*xdr_args
) (xdrs
, args_ptr
));
417 svctcp_reply (SVCXPRT
*xprt
, struct rpc_msg
*msg
)
419 struct tcp_conn
*cd
= (struct tcp_conn
*) (xprt
->xp_p1
);
420 XDR
*xdrs
= &(cd
->xdrs
);
423 xdrs
->x_op
= XDR_ENCODE
;
424 msg
->rm_xid
= cd
->x_id
;
425 stat
= xdr_replymsg (xdrs
, msg
);
426 (void) xdrrec_endofrecord (xdrs
, TRUE
);