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 libc_hidden_proto(memset)
63 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)
86 libc_hidden_proto(stderr)
89 * Ops vector for TCP/IP based rpc service handle
91 static bool_t svctcp_recv (SVCXPRT *, struct rpc_msg *);
92 static enum xprt_stat svctcp_stat (SVCXPRT *);
93 static bool_t svctcp_getargs (SVCXPRT *, xdrproc_t, caddr_t);
94 static bool_t svctcp_reply (SVCXPRT *, struct rpc_msg *);
95 static bool_t svctcp_freeargs (SVCXPRT *, xdrproc_t, caddr_t);
96 static void svctcp_destroy (SVCXPRT *);
98 static const struct xp_ops svctcp_op =
109 * Ops vector for TCP/IP rendezvous handler
111 static bool_t rendezvous_request (SVCXPRT *, struct rpc_msg *);
112 static enum xprt_stat rendezvous_stat (SVCXPRT *);
113 static void svctcp_rendezvous_abort (void) attribute_noreturn;
115 /* This function makes sure abort() relocation goes through PLT
116 and thus can be lazy bound. */
118 svctcp_rendezvous_abort (void)
123 static const struct xp_ops svctcp_rendezvous_op =
127 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
128 (bool_t (*) (SVCXPRT *, struct rpc_msg *)) svctcp_rendezvous_abort,
129 (bool_t (*) (SVCXPRT *, xdrproc_t, caddr_t)) svctcp_rendezvous_abort,
133 static int readtcp (char*, char *, int);
134 static int writetcp (char *, char *, int);
135 static SVCXPRT *makefd_xprt (int, u_int, u_int) internal_function;
137 struct tcp_rendezvous
138 { /* kept in xprt->xp_p1 */
144 { /* kept in xprt->xp_p1 */
145 enum xprt_stat strm_stat;
148 char verf_body[MAX_AUTH_BYTES];
153 * xprt = svctcp_create(sock, send_buf_size, recv_buf_size);
155 * Creates, registers, and returns a (rpc) tcp based transporter.
156 * Once *xprt is initialized, it is registered as a transporter
157 * see (svc.h, xprt_register). This routine returns
158 * a NULL if a problem occurred.
160 * If sock<0 then a socket is created, else sock is used.
161 * If the socket, sock is not bound to a port then svctcp_create
162 * binds it to an arbitrary port. The routine then starts a tcp
163 * listener on the socket's associated port. In any (successful) case,
164 * xprt->xp_sock is the registered socket number and xprt->xp_port is the
165 * associated port number.
167 * Since tcp streams do buffered io similar to stdio, the caller can specify
168 * how big the send and receive buffers are via the second and third parms;
169 * 0 => use the system default.
172 svctcp_create (int sock, u_int sendsize, u_int recvsize)
174 bool_t madesock = FALSE;
176 struct tcp_rendezvous *r;
177 struct sockaddr_in addr;
178 socklen_t len = sizeof (struct sockaddr_in);
180 if (sock == RPC_ANYSOCK)
182 if ((sock = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
184 perror (_("svc_tcp.c - tcp socket creation problem"));
185 return (SVCXPRT *) NULL;
189 memset ((char *) &addr, 0, sizeof (addr));
190 addr.sin_family = AF_INET;
191 if (bindresvport (sock, &addr))
194 (void) bind (sock, (struct sockaddr *) &addr, len);
196 if ((getsockname (sock, (struct sockaddr *) &addr, &len) != 0) ||
197 (listen (sock, 2) != 0))
199 perror (_("svc_tcp.c - cannot getsockname or listen"));
202 return (SVCXPRT *) NULL;
204 r = (struct tcp_rendezvous *) mem_alloc (sizeof (*r));
205 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
206 if (r == NULL || xprt == NULL)
209 if (_IO_fwide (stderr, 0) > 0)
210 (void) __fwprintf (stderr, L"%s", _("svctcp_create: out of memory\n"));
213 (void) fputs (_("svctcp_create: out of memory\n"), stderr);
214 mem_free (r, sizeof (*r));
215 mem_free (xprt, sizeof (SVCXPRT));
218 r->sendsize = sendsize;
219 r->recvsize = recvsize;
221 xprt->xp_p1 = (caddr_t) r;
222 xprt->xp_verf = _null_auth;
223 xprt->xp_ops = &svctcp_rendezvous_op;
224 xprt->xp_port = ntohs (addr.sin_port);
225 xprt->xp_sock = sock;
226 xprt_register (xprt);
231 * Like svtcp_create(), except the routine takes any *open* UNIX file
232 * descriptor as its first input.
235 svcfd_create (int fd, u_int sendsize, u_int recvsize);
237 svcfd_create (int fd, u_int sendsize, u_int recvsize)
239 return makefd_xprt (fd, sendsize, recvsize);
244 makefd_xprt (int fd, u_int sendsize, u_int recvsize)
249 xprt = (SVCXPRT *) mem_alloc (sizeof (SVCXPRT));
250 cd = (struct tcp_conn *) mem_alloc (sizeof (struct tcp_conn));
251 if (xprt == (SVCXPRT *) NULL || cd == NULL)
254 if (_IO_fwide (stderr, 0) > 0)
255 (void) __fwprintf (stderr, L"%s",
256 _("svc_tcp: makefd_xprt: out of memory\n"));
259 (void) fputs (_("svc_tcp: makefd_xprt: out of memory\n"), stderr);
260 mem_free (xprt, sizeof (SVCXPRT));
261 mem_free (cd, sizeof (struct tcp_conn));
264 cd->strm_stat = XPRT_IDLE;
265 xdrrec_create (&(cd->xdrs), sendsize, recvsize,
266 (caddr_t) xprt, readtcp, writetcp);
268 xprt->xp_p1 = (caddr_t) cd;
269 xprt->xp_verf.oa_base = cd->verf_body;
270 xprt->xp_addrlen = 0;
271 xprt->xp_ops = &svctcp_op; /* truly deals with calls */
272 xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
274 xprt_register (xprt);
279 rendezvous_request (SVCXPRT *xprt, struct rpc_msg *errmsg attribute_unused)
282 struct tcp_rendezvous *r;
283 struct sockaddr_in addr;
286 r = (struct tcp_rendezvous *) xprt->xp_p1;
288 len = sizeof (struct sockaddr_in);
289 if ((sock = accept (xprt->xp_sock, (struct sockaddr *) &addr, &len)) < 0)
296 * make a new transporter (re-uses xprt)
298 xprt = makefd_xprt (sock, r->sendsize, r->recvsize);
299 memcpy (&xprt->xp_raddr, &addr, sizeof (addr));
300 xprt->xp_addrlen = len;
301 return FALSE; /* there is never an rpc msg to be processed */
304 static enum xprt_stat
305 rendezvous_stat (SVCXPRT *xprt attribute_unused)
311 svctcp_destroy (SVCXPRT *xprt)
313 struct tcp_conn *cd = (struct tcp_conn *) xprt->xp_p1;
315 xprt_unregister (xprt);
316 (void) close (xprt->xp_sock);
317 if (xprt->xp_port != 0)
319 /* a rendezvouser socket */
324 /* an actual connection socket */
325 XDR_DESTROY (&(cd->xdrs));
327 mem_free ((caddr_t) cd, sizeof (struct tcp_conn));
328 mem_free ((caddr_t) xprt, sizeof (SVCXPRT));
333 * reads data from the tcp connection.
334 * any error is fatal and the connection is closed.
335 * (And a read of zero bytes is a half closed stream => error.)
338 readtcp (char *xprtptr, char *buf, int len)
340 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
341 int sock = xprt->xp_sock;
342 int milliseconds = 35 * 1000;
343 struct pollfd pollfd;
348 pollfd.events = POLLIN;
349 switch (poll (&pollfd, 1, milliseconds))
358 if ((pollfd.revents & POLLERR) || (pollfd.revents & POLLHUP)
359 || (pollfd.revents & POLLNVAL))
364 while ((pollfd.revents & POLLIN) == 0);
366 if ((len = read (sock, buf, len)) > 0)
370 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
375 * writes data to the tcp connection.
376 * Any error is fatal and the connection is closed.
379 writetcp (char *xprtptr, char * buf, int len)
381 SVCXPRT *xprt = (SVCXPRT *)xprtptr;
384 for (cnt = len; cnt > 0; cnt -= i, buf += i)
386 if ((i = write (xprt->xp_sock, buf, cnt)) < 0)
388 ((struct tcp_conn *) (xprt->xp_p1))->strm_stat = XPRT_DIED;
395 static enum xprt_stat
396 svctcp_stat (SVCXPRT *xprt)
398 struct tcp_conn *cd =
399 (struct tcp_conn *) (xprt->xp_p1);
401 if (cd->strm_stat == XPRT_DIED)
403 if (!xdrrec_eof (&(cd->xdrs)))
404 return XPRT_MOREREQS;
409 svctcp_recv (SVCXPRT *xprt, struct rpc_msg *msg)
411 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
412 XDR *xdrs = &(cd->xdrs);
414 xdrs->x_op = XDR_DECODE;
415 (void) xdrrec_skiprecord (xdrs);
416 if (xdr_callmsg (xdrs, msg))
418 cd->x_id = msg->rm_xid;
421 cd->strm_stat = XPRT_DIED; /* XXXX */
426 svctcp_getargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
428 return ((*xdr_args) (&(((struct tcp_conn *)
429 (xprt->xp_p1))->xdrs), args_ptr));
433 svctcp_freeargs (SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
435 XDR *xdrs = &(((struct tcp_conn *) (xprt->xp_p1))->xdrs);
437 xdrs->x_op = XDR_FREE;
438 return ((*xdr_args) (xdrs, args_ptr));
442 svctcp_reply (SVCXPRT *xprt, struct rpc_msg *msg)
444 struct tcp_conn *cd = (struct tcp_conn *) (xprt->xp_p1);
445 XDR *xdrs = &(cd->xdrs);
448 xdrs->x_op = XDR_ENCODE;
449 msg->rm_xid = cd->x_id;
450 stat = xdr_replymsg (xdrs, msg);
451 (void) xdrrec_endofrecord (xdrs, TRUE);