2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
30 #if defined(LIBC_SCCS) && !defined(lint)
31 /*static char *sccsid = "from: @(#)svc_unix.c 1.21 87/08/11 Copyr 1984 Sun Micro";*/
32 /*static char *sccsid = "from: @(#)svc_unix.c 2.2 88/08/01 4.0 RPCSRC";*/
33 static char *rcsid = "$FreeBSD: src/lib/libc/rpc/svc_unix.c,v 1.7.2.2 2001/09/05 22:29:23 dec Exp $";
37 * svc_unix.c, Server side for TCP/IP based RPC.
39 * Copyright (C) 1984, Sun Microsystems, Inc.
41 * Actually implements two flavors of transporter -
42 * a unix rendezvouser (a listner and connection establisher)
43 * and a record/unix stream.
51 #include <sys/socket.h>
57 * Ops vector for AF_UNIX based rpc service handle
59 static bool_t svcunix_recv();
60 static enum xprt_stat svcunix_stat();
61 static bool_t svcunix_getargs();
62 static bool_t svcunix_reply();
63 static bool_t svcunix_freeargs();
64 static void svcunix_destroy();
66 static struct xp_ops svcunix_op = {
76 * Ops vector for TCP/IP rendezvous handler
78 static bool_t rendezvous_request();
79 static enum xprt_stat rendezvous_stat();
81 static struct xp_ops svcunix_rendezvous_op = {
90 static int readunix(), writeunix();
91 static SVCXPRT *makefd_xprt();
93 struct unix_rendezvous { /* kept in xprt->xp_p1 */
98 struct unix_conn { /* kept in xprt->xp_p1 */
99 enum xprt_stat strm_stat;
102 char verf_body[MAX_AUTH_BYTES];
108 struct cmsgcred cmcred;
111 static struct cmessage cm;
113 static int __msgread(sock, buf, cnt)
121 bzero((char *)&cm, sizeof(cm));
122 iov[0].iov_base = buf;
123 iov[0].iov_len = cnt;
129 msg.msg_control = (caddr_t)&cm;
130 msg.msg_controllen = sizeof(struct cmessage);
133 return(recvmsg(sock, &msg, 0));
136 static int __msgwrite(sock, buf, cnt)
144 bzero((char *)&cm, sizeof(cm));
145 iov[0].iov_base = buf;
146 iov[0].iov_len = cnt;
148 cm.cmsg.cmsg_type = SCM_CREDS;
149 cm.cmsg.cmsg_level = SOL_SOCKET;
150 cm.cmsg.cmsg_len = sizeof(struct cmessage);
156 msg.msg_control = (caddr_t)&cm;
157 msg.msg_controllen = sizeof(struct cmessage);
160 return(sendmsg(sock, &msg, 0));
165 * xprt = svcunix_create(sock, send_buf_size, recv_buf_size);
167 * Creates, registers, and returns a (rpc) unix based transporter.
168 * Once *xprt is initialized, it is registered as a transporter
169 * see (svc.h, xprt_register). This routine returns
170 * a NULL if a problem occurred.
172 * If sock<0 then a socket is created, else sock is used.
173 * If the socket, sock is not bound to a port then svcunix_create
174 * binds it to an arbitrary port. The routine then starts a unix
175 * listener on the socket's associated port. In any (successful) case,
176 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
177 * associated port number.
179 * Since unix streams do buffered io similar to stdio, the caller can specify
180 * how big the send and receive buffers are via the second and third parms;
181 * 0 => use the system default.
184 svcunix_create(sock, sendsize, recvsize, path)
190 bool_t madesock = FALSE;
191 register SVCXPRT *xprt;
192 register struct unix_rendezvous *r;
193 struct sockaddr_un addr;
194 int len = sizeof(struct sockaddr_un);
196 if (sock == RPC_ANYSOCK) {
197 if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
198 perror("svc_unix.c - AF_UNIX socket creation problem");
199 return ((SVCXPRT *)NULL);
203 memset(&addr, 0, sizeof (addr));
204 addr.sun_family = AF_UNIX;
205 strcpy(addr.sun_path, path);
206 len = strlen(addr.sun_path) + sizeof(addr.sun_family) +
207 sizeof(addr.sun_len) + 1;
210 bind(sock, (struct sockaddr *)&addr, len);
212 if ((getsockname(sock, (struct sockaddr *)&addr, &len) != 0) ||
213 (listen(sock, 2) != 0)) {
214 perror("svc_unix.c - cannot getsockname or listen");
217 return ((SVCXPRT *)NULL);
219 r = (struct unix_rendezvous *)mem_alloc(sizeof(*r));
221 (void) fprintf(stderr, "svcunix_create: out of memory\n");
224 r->sendsize = sendsize;
225 r->recvsize = recvsize;
226 xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
228 (void) fprintf(stderr, "svcunix_create: out of memory\n");
232 xprt->xp_p1 = (caddr_t)r;
233 xprt->xp_verf = _null_auth;
234 xprt->xp_ops = &svcunix_rendezvous_op;
235 xprt->xp_port = -1 /*ntohs(addr.sin_port)*/;
236 xprt->xp_sock = sock;
242 * Like svunix_create(), except the routine takes any *open* UNIX file
243 * descriptor as its first input.
246 svcunixfd_create(fd, sendsize, recvsize)
252 return (makefd_xprt(fd, sendsize, recvsize));
256 makefd_xprt(fd, sendsize, recvsize)
261 register SVCXPRT *xprt;
262 register struct unix_conn *cd;
264 xprt = (SVCXPRT *)mem_alloc(sizeof(SVCXPRT));
265 if (xprt == (SVCXPRT *)NULL) {
266 (void) fprintf(stderr, "svc_unix: makefd_xprt: out of memory\n");
269 cd = (struct unix_conn *)mem_alloc(sizeof(struct unix_conn));
270 if (cd == (struct unix_conn *)NULL) {
271 (void) fprintf(stderr, "svc_unix: makefd_xprt: out of memory\n");
272 mem_free((char *) xprt, sizeof(SVCXPRT));
273 xprt = (SVCXPRT *)NULL;
276 cd->strm_stat = XPRT_IDLE;
277 xdrrec_create(&(cd->xdrs), sendsize, recvsize,
278 (caddr_t)xprt, readunix, writeunix);
280 xprt->xp_p1 = (caddr_t)cd;
281 xprt->xp_verf.oa_base = cd->verf_body;
282 xprt->xp_addrlen = 0;
283 xprt->xp_ops = &svcunix_op; /* truely deals with calls */
284 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
292 rendezvous_request(xprt)
293 register SVCXPRT *xprt;
296 struct unix_rendezvous *r;
297 struct sockaddr_un addr;
298 struct sockaddr_in in_addr;
301 r = (struct unix_rendezvous *)xprt->xp_p1;
303 len = sizeof(struct sockaddr_in);
304 if ((sock = accept(xprt->xp_sock, (struct sockaddr *)&addr,
312 * make a new transporter (re-uses xprt)
314 bzero((char *)&in_addr, sizeof(in_addr));
315 in_addr.sin_family = AF_UNIX;
316 xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
317 xprt->xp_raddr = in_addr;
318 xprt->xp_addrlen = len;
319 return (FALSE); /* there is never an rpc msg to be processed */
322 static enum xprt_stat
330 svcunix_destroy(xprt)
331 register SVCXPRT *xprt;
333 register struct unix_conn *cd = (struct unix_conn *)xprt->xp_p1;
335 xprt_unregister(xprt);
336 (void)_close(xprt->xp_sock);
337 if (xprt->xp_port != 0) {
338 /* a rendezvouser socket */
341 /* an actual connection socket */
342 XDR_DESTROY(&(cd->xdrs));
344 mem_free((caddr_t)cd, sizeof(struct unix_conn));
345 mem_free((caddr_t)xprt, sizeof(SVCXPRT));
349 * All read operations timeout after 35 seconds.
350 * A timeout is fatal for the connection.
352 static struct timeval wait_per_try = { 35, 0 };
355 * reads data from the unix conection.
356 * any error is fatal and the connection is closed.
357 * (And a read of zero bytes is a half closed stream => error.)
359 * Note: we have to be careful here not to allow ourselves to become
360 * blocked too long in this routine. While we're waiting for data from one
361 * client, another client may be trying to connect. To avoid this situation,
362 * some code from svc_run() is transplanted here: the select() loop checks
363 * all RPC descriptors including the one we want and calls svc_getreqset2()
364 * to handle new requests if any are detected.
367 readunix(xprt, buf, len)
368 register SVCXPRT *xprt;
372 register int sock = xprt->xp_sock;
373 struct timeval start, delta, tv;
374 struct timeval tmp1, tmp2;
376 extern fd_set *__svc_fdset;
377 extern int __svc_fdsetsize;
379 delta = wait_per_try;
381 gettimeofday(&start, NULL);
383 int bytes = howmany(__svc_fdsetsize, NFDBITS) *
387 fds = (fd_set *)malloc(bytes);
390 memcpy(fds, __svc_fdset, bytes);
392 /* XXX we know the other bits are still clear */
394 tv = delta; /* in case select() implements writeback */
395 switch (select(svc_maxfd + 1, fds, NULL, NULL, &tv)) {
397 memset(fds, 0, bytes);
400 gettimeofday(&tmp1, NULL);
401 timersub(&tmp1, &start, &tmp2);
402 timersub(&wait_per_try, &tmp2, &tmp1);
403 if (tmp1.tv_sec < 0 || !timerisset(&tmp1))
410 if (!FD_ISSET(sock, fds)) {
411 svc_getreqset2(fds, svc_maxfd + 1);
412 gettimeofday(&tmp1, NULL);
413 timersub(&tmp1, &start, &tmp2);
414 timersub(&wait_per_try, &tmp2, &tmp1);
415 if (tmp1.tv_sec < 0 || !timerisset(&tmp1))
421 } while (!FD_ISSET(sock, fds));
422 if ((len = __msgread(sock, buf, len)) > 0) {
428 ((struct unix_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
435 * writes data to the unix connection.
436 * Any error is fatal and the connection is closed.
439 writeunix(xprt, buf, len)
440 register SVCXPRT *xprt;
446 for (cnt = len; cnt > 0; cnt -= i, buf += i) {
447 if ((i = __msgwrite(xprt->xp_sock, buf, cnt)) < 0) {
448 ((struct unix_conn *)(xprt->xp_p1))->strm_stat =
456 static enum xprt_stat
460 register struct unix_conn *cd =
461 (struct unix_conn *)(xprt->xp_p1);
463 if (cd->strm_stat == XPRT_DIED)
465 if (! xdrrec_eof(&(cd->xdrs)))
466 return (XPRT_MOREREQS);
471 svcunix_recv(xprt, msg)
473 register struct rpc_msg *msg;
475 register struct unix_conn *cd =
476 (struct unix_conn *)(xprt->xp_p1);
477 register XDR *xdrs = &(cd->xdrs);
479 xdrs->x_op = XDR_DECODE;
480 (void)xdrrec_skiprecord(xdrs);
481 if (xdr_callmsg(xdrs, msg)) {
482 cd->x_id = msg->rm_xid;
483 /* set up verifiers */
484 msg->rm_call.cb_verf.oa_flavor = AUTH_UNIX;
485 msg->rm_call.cb_verf.oa_base = (caddr_t)&cm;
486 msg->rm_call.cb_verf.oa_length = sizeof(cm);
489 cd->strm_stat = XPRT_DIED; /* XXXX */
494 svcunix_getargs(xprt, xdr_args, args_ptr)
500 return ((*xdr_args)(&(((struct unix_conn *)(xprt->xp_p1))->xdrs), args_ptr));
504 svcunix_freeargs(xprt, xdr_args, args_ptr)
510 &(((struct unix_conn *)(xprt->xp_p1))->xdrs);
512 xdrs->x_op = XDR_FREE;
513 return ((*xdr_args)(xdrs, args_ptr));
517 svcunix_reply(xprt, msg)
519 register struct rpc_msg *msg;
521 register struct unix_conn *cd =
522 (struct unix_conn *)(xprt->xp_p1);
523 register XDR *xdrs = &(cd->xdrs);
524 register bool_t stat;
526 xdrs->x_op = XDR_ENCODE;
527 msg->rm_xid = cd->x_id;
528 stat = xdr_replymsg(xdrs, msg);
529 (void)xdrrec_endofrecord(xdrs, TRUE);