1 /* @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC */
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30 #if !defined(lint) && defined(SCCSIDS)
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.
48 #include <sys/socket.h>
53 * Ops vector for TCP/IP based rpc service handle
55 static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
56 static enum xprt_stat svctcp_stat (SVCXPRT *);
57 static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
58 static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
59 static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
60 static void svctcp_destroy (SVCXPRT *);
62 static const struct xp_ops svctcp_op =
73 * Ops vector for TCP/IP rendezvous handler
75 static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
76 static enum xprt_stat rendezvous_stat (SVCXPRT *);
78 static const struct xp_ops svctcp_rendezvous_op =
82 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) abort,
83 (bool_t (*) (SVCXPRT *, struct rpc_msg *)) abort,
84 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) abort,
88 static int readtcp (char*, char *, int);
89 static int writetcp (char *, char *, int);
90 static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
93 { /* kept in xprt->xp_p1 */
99 { /* kept in xprt->xp_p1 */
100 enum xprt_stat strm_stat;
103 char verf_body[MAX_AUTH_BYTES];
108 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
110 * Creates, registers, and returns a (rpc) tcp based transporter.
111 * Once *xprt is initialized, it is registered as a transporter
112 * see (svc.h, xprt_register). This routine returns
113 * a NULL if a problem occurred.
115 * If sock<0 then a socket is created, else sock is used.
116 * If the socket, sock is not bound to a port then svctcp_create
117 * binds it to an arbitrary port. The routine then starts a tcp
118 * listener on the socket's associated port. In any (successful) case,
119 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
120 * associated port number.
122 * Since tcp streams do buffered io similar to stdio, the caller can specify
123 * how big the send and receive buffers are via the second and third parms;
124 * 0 => use the system default.
127 svctcp_create (int sock, u_int sendsize, u_int recvsize)
129 bool_t madesock = FALSE;
131 struct tcp_rendezvous *r;
132 struct sockaddr_in addr;
133 size_t len = sizeof (struct sockaddr_in);
135 if (sock == RPC_ANYSOCK)
137 if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
139 perror (_("svctcp_.c - udp socket creation problem"));
140 return (SVCXPRT *) NULL;
144 bzero ((char *) &addr, sizeof (addr));
145 addr.sin_family = AF_INET;
146 if (bindresvport (sock, &addr))
149 (void) bind (sock, (struct sockaddr *) &addr, len);
151 if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
152 (listen (sock, 2) != 0))
154 perror (_("svctcp_.c - cannot getsockname or listen"));
157 return (SVCXPRT *) NULL;
159 r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
162 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
165 r->sendsize = sendsize;
166 r->recvsize = recvsize;
167 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
170 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
174 xprt->xp_p1 = (caddr_t) r;
175 xprt->xp_verf = _null_auth;
176 xprt->xp_ops = &svctcp_rendezvous_op;
177 xprt->xp_port = ntohs (addr.sin_port);
178 xprt->xp_sock = sock;
179 xprt_register (xprt);
184 * Like svtcp_create(), except the routine takes any *open* UNIX file
185 * descriptor as its first input.
188 svcfd_create (int fd, u_int sendsize, u_int recvsize)
190 return makefd_xprt (fd, sendsize, recvsize);
195 makefd_xprt (int fd, u_int sendsize, u_int recvsize)
200 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
201 if (xprt == (SVCXPRT *) NULL)
203 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
206 cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
207 if (cd == (struct tcp_conn *) NULL)
209 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
210 mem_free ((char *) xprt, sizeof (SVCXPRT));
211 xprt = (SVCXPRT *) NULL;
214 cd->strm_stat = XPRT_IDLE;
215 xdrrec_create (&(cd->xdrs), sendsize, recvsize,
216 (caddr_t) xprt, readtcp, writetcp);
218 xprt->xp_p1 = (caddr_t) cd;
219 xprt->xp_verf.oa_base = cd->verf_body;
220 xprt->xp_addrlen = 0;
221 xprt->xp_ops = &svctcp_op; /* truly deals with calls */
222 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
224 xprt_register (xprt);
230 rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg)
233 struct tcp_rendezvous *r;
234 struct sockaddr_in addr;
237 r = (struct tcp_rendezvous *) xprt->xp_p1;
239 len = sizeof (struct sockaddr_in);
240 if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr,
248 * make a new transporter (re-uses xprt)
250 xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
251 xprt->xp_raddr = addr;
252 xprt->xp_addrlen = len;
253 return FALSE; /* there is never an rpc msg to be processed */
256 static enum xprt_stat
257 rendezvous_stat (SVCXPRT *xprt)
263 svctcp_destroy (SVCXPRT *xprt)
265 struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
267 xprt_unregister (xprt);
268 (void) close (xprt->xp_sock);
269 if (xprt->xp_port != 0)
271 /* a rendezvouser socket */
276 /* an actual connection socket */
277 XDR_DESTROY (&(cd->xdrs));
279 mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
280 mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
284 * All read operations timeout after 35 seconds.
285 * A timeout is fatal for the connection.
287 static struct timeval wait_per_try =
291 * reads data from the tcp connection.
292 * any error is fatal and the connection is closed.
293 * (And a read of zero bytes is a half closed stream => error.)
296 readtcp (char *xprtptr, char *buf, int len)
298 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
299 int sock = xprt->xp_sock;
305 FD_SET (sock, &mask);
307 int mask = 1 << sock;
309 #endif /* def FD_SETSIZE */
312 struct timeval timeout = wait_per_try;
314 if (select (_rpc_dtablesize (), &readfds, (fd_set *) NULL,
315 (fd_set *) NULL, &timeout) <= 0)
325 while (!FD_ISSET (sock, &readfds));
328 while (readfds != mask);
329 #endif /* def FD_SETSIZE */
330 if ((len = read (sock, buf, len)) > 0)
335 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
340 * writes data to the tcp connection.
341 * Any error is fatal and the connection is closed.
344 writetcp (char *xprtptr, char * buf, int len)
346 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
349 for (cnt = len; cnt > 0; cnt -= i, buf += i)
351 if ((i = write (xprt->xp_sock, buf, cnt)) < 0)
353 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat =
361 static enum xprt_stat
362 svctcp_stat (SVCXPRT *xprt)
364 struct tcp_conn *cd =
365 (struct tcp_conn *) (xprt->xp_p1);
367 if (cd->strm_stat == XPRT_DIED)
369 if (!xdrrec_eof (&(cd->xdrs)))
370 return (XPRT_MOREREQS);
375 svctcp_recv (xprt, msg)
379 struct tcp_conn *cd =
380 (struct tcp_conn *) (xprt->xp_p1);
381 XDR *xdrs = &(cd->xdrs);
383 xdrs->x_op = XDR_DECODE;
384 (void) xdrrec_skiprecord (xdrs);
385 if (xdr_callmsg (xdrs, msg))
387 cd->x_id = msg->rm_xid;
394 svctcp_getargs (xprt, xdr_args, args_ptr)
400 return ((*xdr_args) (&(((struct tcp_conn *) (xprt->xp_p1))->xdrs), args_ptr));
404 svctcp_freeargs (xprt, xdr_args, args_ptr)
410 &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
412 xdrs->x_op = XDR_FREE;
413 return ((*xdr_args) (xdrs, args_ptr));
417 svctcp_reply (xprt, msg)
421 struct tcp_conn *cd =
422 (struct tcp_conn *) (xprt->xp_p1);
423 XDR *xdrs = &(cd->xdrs);
426 xdrs->x_op = XDR_ENCODE;
427 msg->rm_xid = cd->x_id;
428 stat = xdr_replymsg (xdrs, msg);
429 (void) xdrrec_endofrecord (xdrs, TRUE);