1 /* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */
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.
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.
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.
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.
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.
26 * Sun Microsystems, Inc.
28 * Mountain View, California 94043
30 #if !defined(lint) && defined(SCCSIDS)
31 static char sccsid[] = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";
36 * Client interface to pmap rpc service.
37 * remote call and broadcast service
39 * Copyright (C) 1984, Sun Microsystems, Inc.
46 #include <rpc/pmap_prot.h>
47 #include <rpc/pmap_clnt.h>
48 #include <rpc/pmap_rmt.h>
50 #include <sys/socket.h>
53 #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
54 #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
57 #include <sys/ioctl.h>
58 #include <arpa/inet.h>
59 #define MAX_BROADCAST_SIZE 1400
61 extern u_long _create_xid (void);
63 static const struct timeval timeout = {3, 0};
66 * pmapper remote-call-service interface.
67 * This routine is used to call the pmapper remote call service
68 * which will look up a service program in the port maps, and then
69 * remotely call that routine with the given parameters. This allows
70 * programs to do a lookup and call in one step.
73 pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
74 struct sockaddr_in *addr;
75 u_long prog, vers, proc;
76 xdrproc_t xdrargs, xdrres;
87 addr->sin_port = htons (PMAPPORT);
88 client = INTUSE(clntudp_create) (addr, PMAPPROG, PMAPVERS, timeout, &socket);
89 if (client != (CLIENT *) NULL)
96 r.port_ptr = port_ptr;
98 r.xdr_results = xdrres;
99 stat = CLNT_CALL (client, PMAPPROC_CALLIT,
100 (xdrproc_t)INTUSE(xdr_rmtcall_args),
101 (caddr_t)&a, (xdrproc_t)INTUSE(xdr_rmtcallres),
103 CLNT_DESTROY (client);
109 /* (void)__close(socket); CLNT_DESTROY already closed it */
116 * XDR remote call arguments
117 * written for XDR_ENCODE direction only
120 xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
122 u_int lenposition, argposition, position;
124 if (INTUSE(xdr_u_long) (xdrs, &(cap->prog)) &&
125 INTUSE(xdr_u_long) (xdrs, &(cap->vers)) &&
126 INTUSE(xdr_u_long) (xdrs, &(cap->proc)))
128 lenposition = XDR_GETPOS (xdrs);
129 if (!INTUSE(xdr_u_long) (xdrs, &(cap->arglen)))
131 argposition = XDR_GETPOS (xdrs);
132 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
134 position = XDR_GETPOS (xdrs);
135 cap->arglen = (u_long) position - (u_long) argposition;
136 XDR_SETPOS (xdrs, lenposition);
137 if (!INTUSE(xdr_u_long) (xdrs, &(cap->arglen)))
139 XDR_SETPOS (xdrs, position);
144 INTDEF(xdr_rmtcall_args)
147 * XDR remote call results
148 * written for XDR_DECODE direction only
151 xdr_rmtcallres (xdrs, crp)
153 struct rmtcallres *crp;
157 port_ptr = (caddr_t) crp->port_ptr;
158 if (INTUSE(xdr_reference) (xdrs, &port_ptr, sizeof (u_long),
159 (xdrproc_t) INTUSE(xdr_u_long))
160 && INTUSE(xdr_u_long) (xdrs, &crp->resultslen))
162 crp->port_ptr = (u_long *) port_ptr;
163 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
167 INTDEF(xdr_rmtcallres)
171 * The following is kludged-up support for simple rpc broadcasts.
172 * Someday a large, complicated system will replace these trivial
173 * routines which only support udp/ip .
178 getbroadcastnets (struct in_addr *addrs, int naddrs)
182 if (getifaddrs (&ifa) == 0)
184 perror ("broadcast: getifaddrs");
189 struct ifaddrs *run = ifa;
190 while (run != NULL && i < naddrs)
192 if ((run->ifa_flags & IFF_BROADCAST) != 0
193 && (run->ifa_flags & IFF_UP) != 0
194 && run->ifa_addr->sa_family == AF_INET)
195 /* Copy the broadcast address. */
196 addrs[i++] = ((struct sockaddr_in *) run->ifa_broadaddr)->sin_addr;
208 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
209 u_long prog; /* program number */
210 u_long vers; /* version number */
211 u_long proc; /* procedure number */
212 xdrproc_t xargs; /* xdr routine for args */
213 caddr_t argsp; /* pointer to args */
214 xdrproc_t xresults; /* xdr routine for results */
215 caddr_t resultsp; /* pointer to results */
216 resultproc_t eachresult; /* call with each result obtained */
218 enum clnt_stat stat = RPC_FAILED;
219 AUTH *unix_auth = INTUSE(authunix_create_default) ();
221 XDR *xdrs = &xdr_stream;
223 int outlen, inlen, nets;
233 struct in_addr addrs[20];
234 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
235 struct rmtcallargs a;
238 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
241 * initialization: create a socket, a broadcast address, and
242 * preserialize the arguments into a send buffer.
244 if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
246 perror (_("Cannot create socket for broadcast rpc"));
251 if (__setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
253 perror (_("Cannot set socket option SO_BROADCAST"));
257 #endif /* def SO_BROADCAST */
260 nets = getbroadcastnets (addrs, sizeof (addrs) / sizeof (addrs[0]));
261 __bzero ((char *) &baddr, sizeof (baddr));
262 baddr.sin_family = AF_INET;
263 baddr.sin_port = htons (PMAPPORT);
264 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
265 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
266 msg.rm_xid = xid = _create_xid ();
268 msg.rm_direction = CALL;
269 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
270 msg.rm_call.cb_prog = PMAPPROG;
271 msg.rm_call.cb_vers = PMAPVERS;
272 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
273 msg.rm_call.cb_cred = unix_auth->ah_cred;
274 msg.rm_call.cb_verf = unix_auth->ah_verf;
281 r.xdr_results = xresults;
282 r.results_ptr = resultsp;
283 INTUSE(xdrmem_create) (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
284 if ((!INTUSE(xdr_callmsg) (xdrs, &msg))
285 || (!INTUSE(xdr_rmtcall_args) (xdrs, &a)))
287 stat = RPC_CANTENCODEARGS;
290 outlen = (int) xdr_getpos (xdrs);
293 * Basic loop: broadcast a packet and wait a while for response(s).
294 * The response timeout grows larger per iteration.
296 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
298 for (i = 0; i < nets; i++)
300 baddr.sin_addr = addrs[i];
301 if (__sendto (sock, outbuf, outlen, 0,
302 (struct sockaddr *) &baddr,
303 sizeof (struct sockaddr)) != outlen)
305 perror (_("Cannot send broadcast packet"));
310 if (eachresult == NULL)
316 msg.acpted_rply.ar_verf = _null_auth;
317 msg.acpted_rply.ar_results.where = (caddr_t) & r;
318 msg.acpted_rply.ar_results.proc = (xdrproc_t) INTUSE(xdr_rmtcallres);
319 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
320 switch (__poll(&fd, 1, milliseconds))
323 case 0: /* timed out */
327 case -1: /* some kind of error */
330 perror (_("Broadcast poll problem"));
334 } /* end of poll results switch */
336 fromlen = sizeof (struct sockaddr);
337 inlen = __recvfrom (sock, inbuf, UDPMSGSIZE, 0,
338 (struct sockaddr *) &raddr, &fromlen);
343 perror (_("Cannot receive reply to broadcast"));
347 if ((size_t) inlen < sizeof (u_long))
350 * see if reply transaction id matches sent id.
351 * If so, decode the results.
353 INTUSE(xdrmem_create) (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
354 if (INTUSE(xdr_replymsg) (xdrs, &msg))
356 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
357 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
358 (msg.acpted_rply.ar_stat == SUCCESS))
360 raddr.sin_port = htons ((u_short) port);
361 done = (*eachresult) (resultsp, &raddr);
363 /* otherwise, we just ignore the errors ... */
368 /* some kind of deserialization problem ... */
369 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
370 fprintf (stderr, "Broadcast deserialization problem");
371 /* otherwise, just random garbage */
374 xdrs->x_op = XDR_FREE;
375 msg.acpted_rply.ar_results.proc = (xdrproc_t)INTUSE(xdr_void);
376 (void) INTUSE(xdr_replymsg) (xdrs, &msg);
377 (void) (*xresults) (xdrs, resultsp);
390 (void) __close (sock);
391 AUTH_DESTROY (unix_auth);