]>
Commit | Line | Data |
---|---|---|
1 | /* @(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC */ | |
2 | /* | |
3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for | |
4 | * unrestricted use provided that this legend is included on all tape | |
5 | * media and as a part of the software program in whole or part. Users | |
6 | * may copy or modify Sun RPC without charge, but are not authorized | |
7 | * to license or distribute it to anyone else except as part of a product or | |
8 | * program developed by the user. | |
9 | * | |
10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE | |
11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR | |
12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. | |
13 | * | |
14 | * Sun RPC is provided with no support and without any obligation on the | |
15 | * part of Sun Microsystems, Inc. to assist in its use, correction, | |
16 | * modification or enhancement. | |
17 | * | |
18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE | |
19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC | |
20 | * OR ANY PART THEREOF. | |
21 | * | |
22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue | |
23 | * or profits or other special, indirect and consequential damages, even if | |
24 | * Sun has been advised of the possibility of such damages. | |
25 | * | |
26 | * Sun Microsystems, Inc. | |
27 | * 2550 Garcia Avenue | |
28 | * Mountain View, California 94043 | |
29 | */ | |
30 | #if !defined(lint) && defined(SCCSIDS) | |
31 | static char sccsid[] = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; | |
32 | #endif | |
33 | ||
34 | /* | |
35 | * svc_tcp.c, Server side for TCP/IP based RPC. | |
36 | * | |
37 | * Copyright (C) 1984, Sun Microsystems, Inc. | |
38 | * | |
39 | * Actually implements two flavors of transporter - | |
40 | * a tcp rendezvouser (a listener and connection establisher) | |
41 | * and a record/tcp stream. | |
42 | */ | |
43 | ||
44 | #include <stdio.h> | |
45 | #include <unistd.h> | |
46 | #include <string.h> | |
47 | #include <libintl.h> | |
48 | #include <rpc/rpc.h> | |
49 | #include <sys/socket.h> | |
50 | #include <sys/poll.h> | |
51 | #include <errno.h> | |
52 | #include <stdlib.h> | |
53 | ||
54 | #ifdef USE_IN_LIBIO | |
55 | # include <wchar.h> | |
56 | # include <libio/iolibio.h> | |
57 | # define fputs(s, f) _IO_fputs (s, f) | |
58 | #endif | |
59 | ||
60 | /* | |
61 | * Ops vector for TCP/IP based rpc service handle | |
62 | */ | |
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 *); | |
69 | ||
70 | static const struct xp_ops svctcp_op = | |
71 | { | |
72 | svctcp_recv, | |
73 | svctcp_stat, | |
74 | svctcp_getargs, | |
75 | svctcp_reply, | |
76 | svctcp_freeargs, | |
77 | svctcp_destroy | |
78 | }; | |
79 | ||
80 | /* | |
81 | * Ops vector for TCP/IP rendezvous handler | |
82 | */ | |
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) __attribute__ ((__noreturn__)); | |
86 | ||
87 | /* This function makes sure abort() relocation goes through PLT | |
88 | and thus can be lazy bound. */ | |
89 | static void | |
90 | svctcp_rendezvous_abort (void) | |
91 | { | |
92 | abort (); | |
93 | }; | |
94 | ||
95 | static const struct xp_ops svctcp_rendezvous_op = | |
96 | { | |
97 | rendezvous_request, | |
98 | rendezvous_stat, | |
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, | |
102 | svctcp_destroy | |
103 | }; | |
104 | ||
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; | |
108 | ||
109 | struct tcp_rendezvous | |
110 | { /* kept in xprt->xp_p1 */ | |
111 | u_int sendsize; | |
112 | u_int recvsize; | |
113 | }; | |
114 | ||
115 | struct tcp_conn | |
116 | { /* kept in xprt->xp_p1 */ | |
117 | enum xprt_stat strm_stat; | |
118 | u_long x_id; | |
119 | XDR xdrs; | |
120 | char verf_body[MAX_AUTH_BYTES]; | |
121 | }; | |
122 | ||
123 | /* | |
124 | * Usage: | |
125 | * xprt = svctcp_create(sock, send_buf_size, recv_buf_size); | |
126 | * | |
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. | |
131 | * | |
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. | |
138 | * | |
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. | |
142 | */ | |
143 | SVCXPRT * | |
144 | svctcp_create (int sock, u_int sendsize, u_int recvsize) | |
145 | { | |
146 | bool_t madesock = FALSE; | |
147 | SVCXPRT *xprt; | |
148 | struct tcp_rendezvous *r; | |
149 | struct sockaddr_in addr; | |
150 | socklen_t len = sizeof (struct sockaddr_in); | |
151 | ||
152 | if (sock == RPC_ANYSOCK) | |
153 | { | |
154 | if ((sock = __socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) | |
155 | { | |
156 | perror (_("svc_tcp.c - tcp socket creation problem")); | |
157 | return (SVCXPRT *) NULL; | |
158 | } | |
159 | madesock = TRUE; | |
160 | } | |
161 | __bzero ((char *) &addr, sizeof (addr)); | |
162 | addr.sin_family = AF_INET; | |
163 | if (bindresvport (sock, &addr)) | |
164 | { | |
165 | addr.sin_port = 0; | |
166 | (void) bind (sock, (struct sockaddr *) &addr, len); | |
167 | } | |
168 | if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) || | |
169 | (listen (sock, 2) != 0)) | |
170 | { | |
171 | perror (_("svc_tcp.c - cannot getsockname or listen")); | |
172 | if (madesock) | |
173 | (void) __close (sock); | |
174 | return (SVCXPRT *) NULL; | |
175 | } | |
176 | r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r)); | |
177 | xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT)); | |
178 | if (r == NULL || xprt == NULL) | |
179 | { | |
180 | #ifdef USE_IN_LIBIO | |
181 | if (_IO_fwide (stderr, 0) > 0) | |
182 | (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n")); | |
183 | else | |
184 | #endif | |
185 | (void) fputs (_("svctcp_create: out of memory\n"), stderr); | |
186 | mem_free (r, sizeof (*r)); | |
187 | mem_free (xprt, sizeof (SVCXPRT)); | |
188 | return NULL; | |
189 | } | |
190 | r->sendsize = sendsize; | |
191 | r->recvsize = recvsize; | |
192 | xprt->xp_p2 = NULL; | |
193 | xprt->xp_p1 = (caddr_t) r; | |
194 | xprt->xp_verf = _null_auth; | |
195 | xprt->xp_ops = &svctcp_rendezvous_op; | |
196 | xprt->xp_port = ntohs (addr.sin_port); | |
197 | xprt->xp_sock = sock; | |
198 | xprt_register (xprt); | |
199 | return xprt; | |
200 | } | |
201 | ||
202 | /* | |
203 | * Like svtcp_create(), except the routine takes any *open* UNIX file | |
204 | * descriptor as its first input. | |
205 | */ | |
206 | SVCXPRT * | |
207 | svcfd_create (int fd, u_int sendsize, u_int recvsize) | |
208 | { | |
209 | return makefd_xprt (fd, sendsize, recvsize); | |
210 | } | |
211 | ||
212 | static SVCXPRT * | |
213 | internal_function | |
214 | makefd_xprt (int fd, u_int sendsize, u_int recvsize) | |
215 | { | |
216 | SVCXPRT *xprt; | |
217 | struct tcp_conn *cd; | |
218 | ||
219 | xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT)); | |
220 | cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn)); | |
221 | if (xprt == (SVCXPRT *) NULL || cd == NULL) | |
222 | { | |
223 | #ifdef USE_IN_LIBIO | |
224 | if (_IO_fwide (stderr, 0) > 0) | |
225 | (void) __fwprintf (stderr, L"%s", | |
226 | _("svc_tcp: makefd_xprt: out of memory\n")); | |
227 | else | |
228 | #endif | |
229 | (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr); | |
230 | mem_free (xprt, sizeof (SVCXPRT)); | |
231 | mem_free (cd, sizeof (struct tcp_conn)); | |
232 | return NULL; | |
233 | } | |
234 | cd->strm_stat = XPRT_IDLE; | |
235 | xdrrec_create (&(cd->xdrs), sendsize, recvsize, | |
236 | (caddr_t) xprt, readtcp, writetcp); | |
237 | xprt->xp_p2 = NULL; | |
238 | xprt->xp_p1 = (caddr_t) cd; | |
239 | xprt->xp_verf.oa_base = cd->verf_body; | |
240 | xprt->xp_addrlen = 0; | |
241 | xprt->xp_ops = &svctcp_op; /* truly deals with calls */ | |
242 | xprt->xp_port = 0; /* this is a connection, not a rendezvouser */ | |
243 | xprt->xp_sock = fd; | |
244 | xprt_register (xprt); | |
245 | return xprt; | |
246 | } | |
247 | ||
248 | static bool_t | |
249 | rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg) | |
250 | { | |
251 | int sock; | |
252 | struct tcp_rendezvous *r; | |
253 | struct sockaddr_in addr; | |
254 | socklen_t len; | |
255 | ||
256 | r = (struct tcp_rendezvous *) xprt->xp_p1; | |
257 | again: | |
258 | len = sizeof (struct sockaddr_in); | |
259 | if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0) | |
260 | { | |
261 | if (errno == EINTR) | |
262 | goto again; | |
263 | return FALSE; | |
264 | } | |
265 | /* | |
266 | * make a new transporter (re-uses xprt) | |
267 | */ | |
268 | xprt = makefd_xprt (sock, r->sendsize, r->recvsize); | |
269 | memcpy (&xprt->xp_raddr, &addr, sizeof (addr)); | |
270 | xprt->xp_addrlen = len; | |
271 | return FALSE; /* there is never an rpc msg to be processed */ | |
272 | } | |
273 | ||
274 | static enum xprt_stat | |
275 | rendezvous_stat (SVCXPRT *xprt) | |
276 | { | |
277 | return XPRT_IDLE; | |
278 | } | |
279 | ||
280 | static void | |
281 | svctcp_destroy (SVCXPRT *xprt) | |
282 | { | |
283 | struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1; | |
284 | ||
285 | xprt_unregister (xprt); | |
286 | (void) __close (xprt->xp_sock); | |
287 | if (xprt->xp_port != 0) | |
288 | { | |
289 | /* a rendezvouser socket */ | |
290 | xprt->xp_port = 0; | |
291 | } | |
292 | else | |
293 | { | |
294 | /* an actual connection socket */ | |
295 | XDR_DESTROY (&(cd->xdrs)); | |
296 | } | |
297 | mem_free ((caddr_t) cd, sizeof (struct tcp_conn)); | |
298 | mem_free ((caddr_t) xprt, sizeof (SVCXPRT)); | |
299 | } | |
300 | ||
301 | ||
302 | /* | |
303 | * reads data from the tcp connection. | |
304 | * any error is fatal and the connection is closed. | |
305 | * (And a read of zero bytes is a half closed stream => error.) | |
306 | */ | |
307 | static int | |
308 | readtcp (char *xprtptr, char *buf, int len) | |
309 | { | |
310 | SVCXPRT *xprt = (SVCXPRT *)xprtptr; | |
311 | int sock = xprt->xp_sock; | |
312 | int milliseconds = 35 * 1000; | |
313 | struct pollfd pollfd; | |
314 | ||
315 | do | |
316 | { | |
317 | pollfd.fd = sock; | |
318 | pollfd.events = POLLIN; | |
319 | switch (__poll (&pollfd, 1, milliseconds)) | |
320 | { | |
321 | case -1: | |
322 | if (errno == EINTR) | |
323 | continue; | |
324 | /*FALLTHROUGH*/ | |
325 | case 0: | |
326 | goto fatal_err; | |
327 | default: | |
328 | if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP) | |
329 | || (pollfd.revents & POLLNVAL)) | |
330 | goto fatal_err; | |
331 | break; | |
332 | } | |
333 | } | |
334 | while ((pollfd.revents & POLLIN) == 0); | |
335 | ||
336 | if ((len = __read (sock, buf, len)) > 0) | |
337 | return len; | |
338 | ||
339 | fatal_err: | |
340 | ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED; | |
341 | return -1; | |
342 | } | |
343 | ||
344 | /* | |
345 | * writes data to the tcp connection. | |
346 | * Any error is fatal and the connection is closed. | |
347 | */ | |
348 | static int | |
349 | writetcp (char *xprtptr, char * buf, int len) | |
350 | { | |
351 | SVCXPRT *xprt = (SVCXPRT *)xprtptr; | |
352 | int i, cnt; | |
353 | ||
354 | for (cnt = len; cnt > 0; cnt -= i, buf += i) | |
355 | { | |
356 | if ((i = __write (xprt->xp_sock, buf, cnt)) < 0) | |
357 | { | |
358 | ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED; | |
359 | return -1; | |
360 | } | |
361 | } | |
362 | return len; | |
363 | } | |
364 | ||
365 | static enum xprt_stat | |
366 | svctcp_stat (SVCXPRT *xprt) | |
367 | { | |
368 | struct tcp_conn *cd = | |
369 | (struct tcp_conn *) (xprt->xp_p1); | |
370 | ||
371 | if (cd->strm_stat == XPRT_DIED) | |
372 | return XPRT_DIED; | |
373 | if (!xdrrec_eof (&(cd->xdrs))) | |
374 | return XPRT_MOREREQS; | |
375 | return XPRT_IDLE; | |
376 | } | |
377 | ||
378 | static bool_t | |
379 | svctcp_recv (SVCXPRT *xprt, struct rpc_msg *msg) | |
380 | { | |
381 | struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1); | |
382 | XDR *xdrs = &(cd->xdrs); | |
383 | ||
384 | xdrs->x_op = XDR_DECODE; | |
385 | (void) xdrrec_skiprecord (xdrs); | |
386 | if (xdr_callmsg (xdrs, msg)) | |
387 | { | |
388 | cd->x_id = msg->rm_xid; | |
389 | return TRUE; | |
390 | } | |
391 | cd->strm_stat = XPRT_DIED; /* XXXX */ | |
392 | return FALSE; | |
393 | } | |
394 | ||
395 | static bool_t | |
396 | svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) | |
397 | { | |
398 | return ((*xdr_args) (&(((struct tcp_conn *) | |
399 | (xprt->xp_p1))->xdrs), args_ptr)); | |
400 | } | |
401 | ||
402 | static bool_t | |
403 | svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr) | |
404 | { | |
405 | XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs); | |
406 | ||
407 | xdrs->x_op = XDR_FREE; | |
408 | return ((*xdr_args) (xdrs, args_ptr)); | |
409 | } | |
410 | ||
411 | static bool_t | |
412 | svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg) | |
413 | { | |
414 | struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1); | |
415 | XDR *xdrs = &(cd->xdrs); | |
416 | bool_t stat; | |
417 | ||
418 | xdrs->x_op = XDR_ENCODE; | |
419 | msg->rm_xid = cd->x_id; | |
420 | stat = xdr_replymsg (xdrs, msg); | |
421 | (void) xdrrec_endofrecord (xdrs, TRUE); | |
422 | return stat; | |
423 | } |