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.
44 #define xdrrec_create __xdrrec_create
45 #define xdrrec_endofrecord __xdrrec_endofrecord
46 #define xdrrec_skiprecord __xdrrec_skiprecord
47 #define xdrrec_eof __xdrrec_eof
48 #define xdr_callmsg __xdr_callmsg
49 #define xdr_replymsg __xdr_replymsg
50 #define xprt_register __xprt_register
51 #define xprt_unregister __xprt_unregister
52 #define getsockname __getsockname
54 #define bindresvport __bindresvport
65 #include <sys/socket.h>
72 # include <libio/iolibio.h>
73 # define fputs(s, f) _IO_fputs (s, f)
77 * Ops vector for TCP/IP based rpc service handle
79 static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
80 static enum xprt_stat svctcp_stat (SVCXPRT *);
81 static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
82 static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
83 static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
84 static void svctcp_destroy (SVCXPRT *);
86 static const struct xp_ops svctcp_op =
97 * Ops vector for TCP/IP rendezvous handler
99 static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
100 static enum xprt_stat rendezvous_stat (SVCXPRT *);
101 static void svctcp_rendezvous_abort (void);
103 /* This function makes sure abort() relocation goes through PLT
104 and thus can be lazy bound. */
106 svctcp_rendezvous_abort (void)
111 static const struct xp_ops svctcp_rendezvous_op =
115 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
116 (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort,
117 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
121 static int readtcp (char*, char *, int);
122 static int writetcp (char *, char *, int);
123 static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
125 struct tcp_rendezvous
126 { /* kept in xprt->xp_p1 */
132 { /* kept in xprt->xp_p1 */
133 enum xprt_stat strm_stat;
136 char verf_body[MAX_AUTH_BYTES];
141 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
143 * Creates, registers, and returns a (rpc) tcp based transporter.
144 * Once *xprt is initialized, it is registered as a transporter
145 * see (svc.h, xprt_register). This routine returns
146 * a NULL if a problem occurred.
148 * If sock<0 then a socket is created, else sock is used.
149 * If the socket, sock is not bound to a port then svctcp_create
150 * binds it to an arbitrary port. The routine then starts a tcp
151 * listener on the socket's associated port. In any (successful) case,
152 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
153 * associated port number.
155 * Since tcp streams do buffered io similar to stdio, the caller can specify
156 * how big the send and receive buffers are via the second and third parms;
157 * 0 => use the system default.
160 svctcp_create (int sock, u_int sendsize, u_int recvsize)
162 bool_t madesock = FALSE;
164 struct tcp_rendezvous *r;
165 struct sockaddr_in addr;
166 socklen_t len = sizeof (struct sockaddr_in);
168 if (sock == RPC_ANYSOCK)
170 if ((sock = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
172 __perror (_("svc_tcp.c - tcp socket creation problem"));
173 return (SVCXPRT *) NULL;
177 __memset ((char *) &addr, 0, sizeof (addr));
178 addr.sin_family = AF_INET;
179 if (bindresvport (sock, &addr))
182 (void) bind (sock, (struct sockaddr *) &addr, len);
184 if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
185 (listen (sock, 2) != 0))
187 __perror (_("svc_tcp.c - cannot getsockname or listen"));
189 (void) __close (sock);
190 return (SVCXPRT *) NULL;
192 r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
193 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
194 if (r == NULL || xprt == NULL)
197 if (_IO_fwide (stderr, 0) > 0)
198 (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n"));
201 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
202 mem_free (r, sizeof (*r));
203 mem_free (xprt, sizeof (SVCXPRT));
206 r->sendsize = sendsize;
207 r->recvsize = recvsize;
209 xprt->xp_p1 = (caddr_t) r;
210 xprt->xp_verf = _null_auth;
211 xprt->xp_ops = &svctcp_rendezvous_op;
212 xprt->xp_port = ntohs (addr.sin_port);
213 xprt->xp_sock = sock;
214 xprt_register (xprt);
219 * Like svtcp_create(), except the routine takes any *open* UNIX file
220 * descriptor as its first input.
223 svcfd_create (int fd, u_int sendsize, u_int recvsize)
225 return makefd_xprt (fd, sendsize, recvsize);
230 makefd_xprt (int fd, u_int sendsize, u_int recvsize)
235 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
236 cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
237 if (xprt == (SVCXPRT *) NULL || cd == NULL)
240 if (_IO_fwide (stderr, 0) > 0)
241 (void) __fwprintf (stderr, L"%s",
242 _("svc_tcp: makefd_xprt: out of memory\n"));
245 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
246 mem_free (xprt, sizeof (SVCXPRT));
247 mem_free (cd, sizeof (struct tcp_conn));
250 cd->strm_stat = XPRT_IDLE;
251 xdrrec_create (&(cd->xdrs), sendsize, recvsize,
252 (caddr_t) xprt, readtcp, writetcp);
254 xprt->xp_p1 = (caddr_t) cd;
255 xprt->xp_verf.oa_base = cd->verf_body;
256 xprt->xp_addrlen = 0;
257 xprt->xp_ops = &svctcp_op; /* truly deals with calls */
258 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
260 xprt_register (xprt);
265 rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg)
268 struct tcp_rendezvous *r;
269 struct sockaddr_in addr;
272 r = (struct tcp_rendezvous *) xprt->xp_p1;
274 len = sizeof (struct sockaddr_in);
275 if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
282 * make a new transporter (re-uses xprt)
284 xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
285 __memcpy (&xprt->xp_raddr, &addr, sizeof (addr));
286 xprt->xp_addrlen = len;
287 return FALSE; /* there is never an rpc msg to be processed */
290 static enum xprt_stat
291 rendezvous_stat (SVCXPRT *xprt)
297 svctcp_destroy (SVCXPRT *xprt)
299 struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
301 xprt_unregister (xprt);
302 (void) __close (xprt->xp_sock);
303 if (xprt->xp_port != 0)
305 /* a rendezvouser socket */
310 /* an actual connection socket */
311 XDR_DESTROY (&(cd->xdrs));
313 mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
314 mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
319 * reads data from the tcp connection.
320 * any error is fatal and the connection is closed.
321 * (And a read of zero bytes is a half closed stream => error.)
324 readtcp (char *xprtptr, char *buf, int len)
326 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
327 int sock = xprt->xp_sock;
328 int milliseconds = 35 * 1000;
329 struct pollfd pollfd;
334 pollfd.events = POLLIN;
335 switch (poll (&pollfd, 1, milliseconds))
344 if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
345 || (pollfd.revents & POLLNVAL))
350 while ((pollfd.revents & POLLIN) == 0);
352 if ((len = __read (sock, buf, len)) > 0)
356 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
361 * writes data to the tcp connection.
362 * Any error is fatal and the connection is closed.
365 writetcp (char *xprtptr, char * buf, int len)
367 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
370 for (cnt = len; cnt > 0; cnt -= i, buf += i)
372 if ((i = __write (xprt->xp_sock, buf, cnt)) < 0)
374 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
381 static enum xprt_stat
382 svctcp_stat (SVCXPRT *xprt)
384 struct tcp_conn *cd =
385 (struct tcp_conn *) (xprt->xp_p1);
387 if (cd->strm_stat == XPRT_DIED)
389 if (!xdrrec_eof (&(cd->xdrs)))
390 return XPRT_MOREREQS;
395 svctcp_recv (SVCXPRT *xprt, struct rpc_msg *msg)
397 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
398 XDR *xdrs = &(cd->xdrs);
400 xdrs->x_op = XDR_DECODE;
401 (void) xdrrec_skiprecord (xdrs);
402 if (xdr_callmsg (xdrs, msg))
404 cd->x_id = msg->rm_xid;
407 cd->strm_stat = XPRT_DIED; /* XXXX */
412 svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
414 return ((*xdr_args) (&(((struct tcp_conn *)
415 (xprt->xp_p1))->xdrs), args_ptr));
419 svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
421 XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
423 xdrs->x_op = XDR_FREE;
424 return ((*xdr_args) (xdrs, args_ptr));
428 svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
430 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
431 XDR *xdrs = &(cd->xdrs);
434 xdrs->x_op = XDR_ENCODE;
435 msg->rm_xid = cd->x_id;
436 stat = xdr_replymsg (xdrs, msg);
437 (void) xdrrec_endofrecord (xdrs, TRUE);