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
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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 u_long dummy_arglen = 0;
129 lenposition = XDR_GETPOS (xdrs);
130 if (!INTUSE(xdr_u_long) (xdrs, &dummy_arglen))
132 argposition = XDR_GETPOS (xdrs);
133 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
135 position = XDR_GETPOS (xdrs);
136 cap->arglen = (u_long) position - (u_long) argposition;
137 XDR_SETPOS (xdrs, lenposition);
138 if (!INTUSE(xdr_u_long) (xdrs, &(cap->arglen)))
140 XDR_SETPOS (xdrs, position);
145 INTDEF(xdr_rmtcall_args)
148 * XDR remote call results
149 * written for XDR_DECODE direction only
152 xdr_rmtcallres (xdrs, crp)
154 struct rmtcallres *crp;
158 port_ptr = (caddr_t) crp->port_ptr;
159 if (INTUSE(xdr_reference) (xdrs, &port_ptr, sizeof (u_long),
160 (xdrproc_t) INTUSE(xdr_u_long))
161 && INTUSE(xdr_u_long) (xdrs, &crp->resultslen))
163 crp->port_ptr = (u_long *) port_ptr;
164 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
168 INTDEF(xdr_rmtcallres)
172 * The following is kludged-up support for simple rpc broadcasts.
173 * Someday a large, complicated system will replace these trivial
174 * routines which only support udp/ip .
179 getbroadcastnets (struct in_addr *addrs, int naddrs)
183 if (getifaddrs (&ifa) != 0)
185 perror ("broadcast: getifaddrs");
190 struct ifaddrs *run = ifa;
191 while (run != NULL && i < naddrs)
193 if ((run->ifa_flags & IFF_BROADCAST) != 0
194 && (run->ifa_flags & IFF_UP) != 0
195 && run->ifa_addr != NULL
196 && run->ifa_addr->sa_family == AF_INET)
197 /* Copy the broadcast address. */
198 addrs[i++] = ((struct sockaddr_in *) run->ifa_broadaddr)->sin_addr;
210 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
211 u_long prog; /* program number */
212 u_long vers; /* version number */
213 u_long proc; /* procedure number */
214 xdrproc_t xargs; /* xdr routine for args */
215 caddr_t argsp; /* pointer to args */
216 xdrproc_t xresults; /* xdr routine for results */
217 caddr_t resultsp; /* pointer to results */
218 resultproc_t eachresult; /* call with each result obtained */
220 enum clnt_stat stat = RPC_FAILED;
221 AUTH *unix_auth = INTUSE(authunix_create_default) ();
223 XDR *xdrs = &xdr_stream;
225 int outlen, inlen, nets;
235 struct in_addr addrs[20];
236 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
237 struct rmtcallargs a;
240 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
243 * initialization: create a socket, a broadcast address, and
244 * preserialize the arguments into a send buffer.
246 if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
248 perror (_("Cannot create socket for broadcast rpc"));
253 if (__setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
255 perror (_("Cannot set socket option SO_BROADCAST"));
259 #endif /* def SO_BROADCAST */
262 nets = getbroadcastnets (addrs, sizeof (addrs) / sizeof (addrs[0]));
263 __bzero ((char *) &baddr, sizeof (baddr));
264 baddr.sin_family = AF_INET;
265 baddr.sin_port = htons (PMAPPORT);
266 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
267 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
268 msg.rm_xid = xid = _create_xid ();
270 msg.rm_direction = CALL;
271 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
272 msg.rm_call.cb_prog = PMAPPROG;
273 msg.rm_call.cb_vers = PMAPVERS;
274 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
275 msg.rm_call.cb_cred = unix_auth->ah_cred;
276 msg.rm_call.cb_verf = unix_auth->ah_verf;
283 r.xdr_results = xresults;
284 r.results_ptr = resultsp;
285 INTUSE(xdrmem_create) (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
286 if ((!INTUSE(xdr_callmsg) (xdrs, &msg))
287 || (!INTUSE(xdr_rmtcall_args) (xdrs, &a)))
289 stat = RPC_CANTENCODEARGS;
292 outlen = (int) xdr_getpos (xdrs);
295 * Basic loop: broadcast a packet and wait a while for response(s).
296 * The response timeout grows larger per iteration.
298 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
300 for (i = 0; i < nets; i++)
302 baddr.sin_addr = addrs[i];
303 if (__sendto (sock, outbuf, outlen, 0,
304 (struct sockaddr *) &baddr,
305 sizeof (struct sockaddr)) != outlen)
307 perror (_("Cannot send broadcast packet"));
312 if (eachresult == NULL)
318 msg.acpted_rply.ar_verf = _null_auth;
319 msg.acpted_rply.ar_results.where = (caddr_t) & r;
320 msg.acpted_rply.ar_results.proc = (xdrproc_t) INTUSE(xdr_rmtcallres);
321 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
322 switch (__poll(&fd, 1, milliseconds))
325 case 0: /* timed out */
329 case -1: /* some kind of error */
332 perror (_("Broadcast poll problem"));
336 } /* end of poll results switch */
338 fromlen = sizeof (struct sockaddr);
339 inlen = __recvfrom (sock, inbuf, UDPMSGSIZE, 0,
340 (struct sockaddr *) &raddr, &fromlen);
345 perror (_("Cannot receive reply to broadcast"));
349 if ((size_t) inlen < sizeof (u_long))
352 * see if reply transaction id matches sent id.
353 * If so, decode the results.
355 INTUSE(xdrmem_create) (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
356 if (INTUSE(xdr_replymsg) (xdrs, &msg))
358 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
359 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
360 (msg.acpted_rply.ar_stat == SUCCESS))
362 raddr.sin_port = htons ((u_short) port);
363 done = (*eachresult) (resultsp, &raddr);
365 /* otherwise, we just ignore the errors ... */
370 /* some kind of deserialization problem ... */
371 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
372 fprintf (stderr, "Broadcast deserialization problem");
373 /* otherwise, just random garbage */
376 xdrs->x_op = XDR_FREE;
377 msg.acpted_rply.ar_results.proc = (xdrproc_t)INTUSE(xdr_void);
378 (void) INTUSE(xdr_replymsg) (xdrs, &msg);
379 (void) (*xresults) (xdrs, resultsp);
392 (void) __close (sock);
393 AUTH_DESTROY (unix_auth);