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)
62 /* Experimentally off - libc_hidden_proto(memset) */
63 /* Experimentally off - libc_hidden_proto(memcpy) */
64 libc_hidden_proto(socket)
65 libc_hidden_proto(close)
66 libc_hidden_proto(read)
67 libc_hidden_proto(write)
68 libc_hidden_proto(perror)
69 libc_hidden_proto(xdrrec_create)
70 libc_hidden_proto(xdrrec_endofrecord)
71 libc_hidden_proto(xdrrec_skiprecord)
72 libc_hidden_proto(xdrrec_eof)
73 libc_hidden_proto(xdr_callmsg)
74 libc_hidden_proto(xdr_replymsg)
75 libc_hidden_proto(xprt_register)
76 libc_hidden_proto(xprt_unregister)
77 libc_hidden_proto(getsockname)
78 libc_hidden_proto(bind)
79 libc_hidden_proto(bindresvport)
80 libc_hidden_proto(poll)
81 libc_hidden_proto(accept)
82 libc_hidden_proto(listen)
83 libc_hidden_proto(fputs)
84 libc_hidden_proto(fclose)
85 libc_hidden_proto(abort)
88 * Ops vector for TCP/IP based rpc service handle
90 static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
91 static enum xprt_stat svctcp_stat (SVCXPRT *);
92 static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
93 static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
94 static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
95 static void svctcp_destroy (SVCXPRT *);
97 static const struct xp_ops svctcp_op =
108 * Ops vector for TCP/IP rendezvous handler
110 static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
111 static enum xprt_stat rendezvous_stat (SVCXPRT *);
112 static void svctcp_rendezvous_abort (void) attribute_noreturn;
114 /* This function makes sure abort() relocation goes through PLT
115 and thus can be lazy bound. */
117 svctcp_rendezvous_abort (void)
122 static const struct xp_ops svctcp_rendezvous_op =
126 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
127 (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort,
128 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
132 static int readtcp (char*, char *, int);
133 static int writetcp (char *, char *, int);
134 static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
136 struct tcp_rendezvous
137 { /* kept in xprt->xp_p1 */
143 { /* kept in xprt->xp_p1 */
144 enum xprt_stat strm_stat;
147 char verf_body[MAX_AUTH_BYTES];
152 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
154 * Creates, registers, and returns a (rpc) tcp based transporter.
155 * Once *xprt is initialized, it is registered as a transporter
156 * see (svc.h, xprt_register). This routine returns
157 * a NULL if a problem occurred.
159 * If sock<0 then a socket is created, else sock is used.
160 * If the socket, sock is not bound to a port then svctcp_create
161 * binds it to an arbitrary port. The routine then starts a tcp
162 * listener on the socket's associated port. In any (successful) case,
163 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
164 * associated port number.
166 * Since tcp streams do buffered io similar to stdio, the caller can specify
167 * how big the send and receive buffers are via the second and third parms;
168 * 0 => use the system default.
171 svctcp_create (int sock, u_int sendsize, u_int recvsize)
173 bool_t madesock = FALSE;
175 struct tcp_rendezvous *r;
176 struct sockaddr_in addr;
177 socklen_t len = sizeof (struct sockaddr_in);
179 if (sock == RPC_ANYSOCK)
181 if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
183 perror (_("svc_tcp.c - tcp socket creation problem"));
184 return (SVCXPRT *) NULL;
188 memset ((char *) &addr, 0, sizeof (addr));
189 addr.sin_family = AF_INET;
190 if (bindresvport (sock, &addr))
193 (void) bind (sock, (struct sockaddr *) &addr, len);
195 if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
196 (listen (sock, 2) != 0))
198 perror (_("svc_tcp.c - cannot getsockname or listen"));
201 return (SVCXPRT *) NULL;
203 r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
204 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
205 if (r == NULL || xprt == NULL)
208 if (_IO_fwide (stderr, 0) > 0)
209 (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n"));
212 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
213 mem_free (r, sizeof (*r));
214 mem_free (xprt, sizeof (SVCXPRT));
217 r->sendsize = sendsize;
218 r->recvsize = recvsize;
220 xprt->xp_p1 = (caddr_t) r;
221 xprt->xp_verf = _null_auth;
222 xprt->xp_ops = &svctcp_rendezvous_op;
223 xprt->xp_port = ntohs (addr.sin_port);
224 xprt->xp_sock = sock;
225 xprt_register (xprt);
230 * Like svtcp_create(), except the routine takes any *open* UNIX file
231 * descriptor as its first input.
234 svcfd_create (int fd, u_int sendsize, u_int recvsize);
236 svcfd_create (int fd, u_int sendsize, u_int recvsize)
238 return makefd_xprt (fd, sendsize, recvsize);
243 makefd_xprt (int fd, u_int sendsize, u_int recvsize)
248 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
249 cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
250 if (xprt == (SVCXPRT *) NULL || cd == NULL)
253 if (_IO_fwide (stderr, 0) > 0)
254 (void) __fwprintf (stderr, L"%s",
255 _("svc_tcp: makefd_xprt: out of memory\n"));
258 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
259 mem_free (xprt, sizeof (SVCXPRT));
260 mem_free (cd, sizeof (struct tcp_conn));
263 cd->strm_stat = XPRT_IDLE;
264 xdrrec_create (&(cd->xdrs), sendsize, recvsize,
265 (caddr_t) xprt, readtcp, writetcp);
267 xprt->xp_p1 = (caddr_t) cd;
268 xprt->xp_verf.oa_base = cd->verf_body;
269 xprt->xp_addrlen = 0;
270 xprt->xp_ops = &svctcp_op; /* truly deals with calls */
271 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
273 xprt_register (xprt);
278 rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg attribute_unused)
281 struct tcp_rendezvous *r;
282 struct sockaddr_in addr;
285 r = (struct tcp_rendezvous *) xprt->xp_p1;
287 len = sizeof (struct sockaddr_in);
288 if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
295 * make a new transporter (re-uses xprt)
297 xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
298 memcpy (&xprt->xp_raddr, &addr, sizeof (addr));
299 xprt->xp_addrlen = len;
300 return FALSE; /* there is never an rpc msg to be processed */
303 static enum xprt_stat
304 rendezvous_stat (SVCXPRT *xprt attribute_unused)
310 svctcp_destroy (SVCXPRT *xprt)
312 struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
314 xprt_unregister (xprt);
315 (void) close (xprt->xp_sock);
316 if (xprt->xp_port != 0)
318 /* a rendezvouser socket */
323 /* an actual connection socket */
324 XDR_DESTROY (&(cd->xdrs));
326 mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
327 mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
332 * reads data from the tcp connection.
333 * any error is fatal and the connection is closed.
334 * (And a read of zero bytes is a half closed stream => error.)
337 readtcp (char *xprtptr, char *buf, int len)
339 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
340 int sock = xprt->xp_sock;
341 int milliseconds = 35 * 1000;
342 struct pollfd pollfd;
347 pollfd.events = POLLIN;
348 switch (poll (&pollfd, 1, milliseconds))
357 if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
358 || (pollfd.revents & POLLNVAL))
363 while ((pollfd.revents & POLLIN) == 0);
365 if ((len = read (sock, buf, len)) > 0)
369 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
374 * writes data to the tcp connection.
375 * Any error is fatal and the connection is closed.
378 writetcp (char *xprtptr, char * buf, int len)
380 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
383 for (cnt = len; cnt > 0; cnt -= i, buf += i)
385 if ((i = write (xprt->xp_sock, buf, cnt)) < 0)
387 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
394 static enum xprt_stat
395 svctcp_stat (SVCXPRT *xprt)
397 struct tcp_conn *cd =
398 (struct tcp_conn *) (xprt->xp_p1);
400 if (cd->strm_stat == XPRT_DIED)
402 if (!xdrrec_eof (&(cd->xdrs)))
403 return XPRT_MOREREQS;
408 svctcp_recv (SVCXPRT *xprt, struct rpc_msg *msg)
410 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
411 XDR *xdrs = &(cd->xdrs);
413 xdrs->x_op = XDR_DECODE;
414 (void) xdrrec_skiprecord (xdrs);
415 if (xdr_callmsg (xdrs, msg))
417 cd->x_id = msg->rm_xid;
420 cd->strm_stat = XPRT_DIED; /* XXXX */
425 svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
427 return ((*xdr_args) (&(((struct tcp_conn *)
428 (xprt->xp_p1))->xdrs), args_ptr));
432 svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
434 XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
436 xdrs->x_op = XDR_FREE;
437 return ((*xdr_args) (xdrs, args_ptr));
441 svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
443 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
444 XDR *xdrs = &(cd->xdrs);
447 xdrs->x_op = XDR_ENCODE;
448 msg->rm_xid = cd->x_id;
449 stat = xdr_replymsg (xdrs, msg);
450 (void) xdrrec_endofrecord (xdrs, TRUE);