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.
49 #include <sys/socket.h>
56 # include <libio/iolibio.h>
57 # define fputs(s, f) _IO_fputs (s, f)
61 * Ops vector for TCP/IP based rpc service handle
63 static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
64 static enum xprt_stat svctcp_stat (SVCXPRT *);
65 static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
66 static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
67 static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
68 static void svctcp_destroy (SVCXPRT *);
70 static const struct xp_ops svctcp_op =
81 * Ops vector for TCP/IP rendezvous handler
83 static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
84 static enum xprt_stat rendezvous_stat (SVCXPRT *);
85 static void svctcp_rendezvous_abort (void);
87 /* This function makes sure abort() relocation goes through PLT
88 and thus can be lazy bound. */
90 svctcp_rendezvous_abort (void)
95 static const struct xp_ops svctcp_rendezvous_op =
99 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
100 (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort,
101 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
105 static int readtcp (char*, char *, int);
106 static int writetcp (char *, char *, int);
107 static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
109 struct tcp_rendezvous
110 { /* kept in xprt->xp_p1 */
116 { /* kept in xprt->xp_p1 */
117 enum xprt_stat strm_stat;
120 char verf_body[MAX_AUTH_BYTES];
125 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
127 * Creates, registers, and returns a (rpc) tcp based transporter.
128 * Once *xprt is initialized, it is registered as a transporter
129 * see (svc.h, xprt_register). This routine returns
130 * a NULL if a problem occurred.
132 * If sock<0 then a socket is created, else sock is used.
133 * If the socket, sock is not bound to a port then svctcp_create
134 * binds it to an arbitrary port. The routine then starts a tcp
135 * listener on the socket's associated port. In any (successful) case,
136 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
137 * associated port number.
139 * Since tcp streams do buffered io similar to stdio, the caller can specify
140 * how big the send and receive buffers are via the second and third parms;
141 * 0 => use the system default.
144 svctcp_create (int sock, u_int sendsize, u_int recvsize)
146 bool_t madesock = FALSE;
148 struct tcp_rendezvous *r;
149 struct sockaddr_in addr;
150 socklen_t len = sizeof (struct sockaddr_in);
152 if (sock == RPC_ANYSOCK)
154 if ((sock = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
156 perror (_("svc_tcp.c - tcp socket creation problem"));
157 return (SVCXPRT *) NULL;
161 __bzero ((char *) &addr, sizeof (addr));
162 addr.sin_family = AF_INET;
163 if (bindresvport (sock, &addr))
166 (void) bind (sock, (struct sockaddr *) &addr, len);
168 if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
169 (listen (sock, 2) != 0))
171 perror (_("svc_tcp.c - cannot getsockname or listen"));
173 (void) __close (sock);
174 return (SVCXPRT *) NULL;
176 r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
177 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
178 if (r == NULL || xprt == NULL)
181 if (_IO_fwide (stderr, 0) > 0)
182 (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n"));
185 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
188 r->sendsize = sendsize;
189 r->recvsize = recvsize;
191 xprt->xp_p1 = (caddr_t) r;
192 xprt->xp_verf = _null_auth;
193 xprt->xp_ops = &svctcp_rendezvous_op;
194 xprt->xp_port = ntohs (addr.sin_port);
195 xprt->xp_sock = sock;
196 xprt_register (xprt);
201 * Like svtcp_create(), except the routine takes any *open* UNIX file
202 * descriptor as its first input.
205 svcfd_create (int fd, u_int sendsize, u_int recvsize)
207 return makefd_xprt (fd, sendsize, recvsize);
212 makefd_xprt (int fd, u_int sendsize, u_int recvsize)
217 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
218 cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
219 if (xprt == (SVCXPRT *) NULL || cd == NULL)
222 if (_IO_fwide (stderr, 0) > 0)
223 (void) __fwprintf (stderr, L"%s",
224 _("svc_tcp: makefd_xprt: out of memory\n"));
227 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
230 cd->strm_stat = XPRT_IDLE;
231 xdrrec_create (&(cd->xdrs), sendsize, recvsize,
232 (caddr_t) xprt, readtcp, writetcp);
234 xprt->xp_p1 = (caddr_t) cd;
235 xprt->xp_verf.oa_base = cd->verf_body;
236 xprt->xp_addrlen = 0;
237 xprt->xp_ops = &svctcp_op; /* truly deals with calls */
238 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
240 xprt_register (xprt);
245 rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg)
248 struct tcp_rendezvous *r;
249 struct sockaddr_in addr;
252 r = (struct tcp_rendezvous *) xprt->xp_p1;
254 len = sizeof (struct sockaddr_in);
255 if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
262 * make a new transporter (re-uses xprt)
264 xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
265 memcpy (&xprt->xp_raddr, &addr, sizeof (addr));
266 xprt->xp_addrlen = len;
267 return FALSE; /* there is never an rpc msg to be processed */
270 static enum xprt_stat
271 rendezvous_stat (SVCXPRT *xprt)
277 svctcp_destroy (SVCXPRT *xprt)
279 struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
281 xprt_unregister (xprt);
282 (void) __close (xprt->xp_sock);
283 if (xprt->xp_port != 0)
285 /* a rendezvouser socket */
290 /* an actual connection socket */
291 XDR_DESTROY (&(cd->xdrs));
293 mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
294 mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
299 * reads data from the tcp connection.
300 * any error is fatal and the connection is closed.
301 * (And a read of zero bytes is a half closed stream => error.)
304 readtcp (char *xprtptr, char *buf, int len)
306 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
307 int sock = xprt->xp_sock;
308 int milliseconds = 35 * 1000;
309 struct pollfd pollfd;
314 pollfd.events = POLLIN;
315 switch (__poll (&pollfd, 1, milliseconds))
324 if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
325 || (pollfd.revents & POLLNVAL))
330 while ((pollfd.revents & POLLIN) == 0);
332 if ((len = __read (sock, buf, len)) > 0)
336 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
341 * writes data to the tcp connection.
342 * Any error is fatal and the connection is closed.
345 writetcp (char *xprtptr, char * buf, int len)
347 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
350 for (cnt = len; cnt > 0; cnt -= i, buf += i)
352 if ((i = __write (xprt->xp_sock, buf, cnt)) < 0)
354 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
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 (SVCXPRT *xprt, struct rpc_msg *msg)
377 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
378 XDR *xdrs = &(cd->xdrs);
380 xdrs->x_op = XDR_DECODE;
381 (void) xdrrec_skiprecord (xdrs);
382 if (xdr_callmsg (xdrs, msg))
384 cd->x_id = msg->rm_xid;
387 cd->strm_stat = XPRT_DIED; /* XXXX */
392 svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
394 return ((*xdr_args) (&(((struct tcp_conn *)
395 (xprt->xp_p1))->xdrs), args_ptr));
399 svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
401 XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
403 xdrs->x_op = XDR_FREE;
404 return ((*xdr_args) (xdrs, args_ptr));
408 svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
410 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
411 XDR *xdrs = &(cd->xdrs);
414 xdrs->x_op = XDR_ENCODE;
415 msg->rm_xid = cd->x_id;
416 stat = xdr_replymsg (xdrs, msg);
417 (void) xdrrec_endofrecord (xdrs, TRUE);