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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16 * modification or enhancement.
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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20 * OR ANY PART THEREOF.
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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.
45 #include <rpc/pmap_prot.h>
46 #include <rpc/pmap_clnt.h>
47 #include <rpc/pmap_rmt.h>
48 #include <sys/socket.h>
51 #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
52 #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
54 #include <sys/ioctl.h>
55 #include <arpa/inet.h>
56 #define MAX_BROADCAST_SIZE 1400
58 static struct timeval timeout = {3, 0};
61 * pmapper remote-call-service interface.
62 * This routine is used to call the pmapper remote call service
63 * which will look up a service program in the port maps, and then
64 * remotely call that routine with the given parameters. This allows
65 * programs to do a lookup and call in one step.
68 pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
69 struct sockaddr_in *addr;
70 u_long prog, vers, proc;
71 xdrproc_t xdrargs, xdrres;
82 addr->sin_port = htons (PMAPPORT);
83 client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &socket);
84 if (client != (CLIENT *) NULL)
91 r.port_ptr = port_ptr;
93 r.xdr_results = xdrres;
94 stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,
95 (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,
97 CLNT_DESTROY (client);
103 /* (void)close(socket); CLNT_DESTROY already closed it */
110 * XDR remote call arguments
111 * written for XDR_ENCODE direction only
114 xdr_rmtcall_args (xdrs, cap)
116 struct rmtcallargs *cap;
118 u_int lenposition, argposition, position;
120 if (xdr_u_long (xdrs, &(cap->prog)) &&
121 xdr_u_long (xdrs, &(cap->vers)) &&
122 xdr_u_long (xdrs, &(cap->proc)))
124 lenposition = XDR_GETPOS (xdrs);
125 if (!xdr_u_long (xdrs, &(cap->arglen)))
127 argposition = XDR_GETPOS (xdrs);
128 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
130 position = XDR_GETPOS (xdrs);
131 cap->arglen = (u_long) position - (u_long) argposition;
132 XDR_SETPOS (xdrs, lenposition);
133 if (!xdr_u_long (xdrs, &(cap->arglen)))
135 XDR_SETPOS (xdrs, position);
142 * XDR remote call results
143 * written for XDR_DECODE direction only
146 xdr_rmtcallres (xdrs, crp)
148 struct rmtcallres *crp;
152 port_ptr = (caddr_t) crp->port_ptr;
153 if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)
154 && xdr_u_long (xdrs, &crp->resultslen))
156 crp->port_ptr = (u_long *) port_ptr;
157 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
164 * The following is kludged-up support for simple rpc broadcasts.
165 * Someday a large, complicated system will replace these trivial
166 * routines which only support udp/ip .
170 getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
171 /* int sock: any valid socket will do */
172 /* char *buf: why allocate more when we can use existing... */
175 struct ifreq ifreq, *ifr;
176 struct sockaddr_in *sin;
179 ifc.ifc_len = UDPMSGSIZE;
181 if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
183 perror (_("broadcast: ioctl (get interface configuration)"));
187 for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
190 if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
192 perror (_("broadcast: ioctl (get interface flags)"));
195 if ((ifreq.ifr_flags & IFF_BROADCAST) &&
196 (ifreq.ifr_flags & IFF_UP) &&
197 ifr->ifr_addr.sa_family == AF_INET)
199 sin = (struct sockaddr_in *) &ifr->ifr_addr;
200 #ifdef SIOCGIFBRDADDR /* 4.3BSD */
201 if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
203 addrs[i++] = inet_makeaddr (inet_netof
204 /* Changed to pass struct instead of s_addr member
206 (sin->sin_addr), INADDR_ANY);
210 addrs[i++] = ((struct sockaddr_in *)
211 &ifreq.ifr_addr)->sin_addr;
214 addrs[i++] = inet_makeaddr (inet_netof
215 (sin->sin_addr.s_addr), INADDR_ANY);
224 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
225 u_long prog; /* program number */
226 u_long vers; /* version number */
227 u_long proc; /* procedure number */
228 xdrproc_t xargs; /* xdr routine for args */
229 caddr_t argsp; /* pointer to args */
230 xdrproc_t xresults; /* xdr routine for results */
231 caddr_t resultsp; /* pointer to results */
232 resultproc_t eachresult; /* call with each result obtained */
235 AUTH *unix_auth = authunix_create_default ();
237 XDR *xdrs = &xdr_stream;
238 int outlen, inlen, fromlen, nets;
247 #endif /* def FD_SETSIZE */
252 struct in_addr addrs[20];
253 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
254 struct rmtcallargs a;
257 struct timeval t, t1;
258 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
261 * initialization: create a socket, a broadcast address, and
262 * preserialize the arguments into a send buffer.
264 if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
266 perror (_("Cannot create socket for broadcast rpc"));
271 if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
273 perror (_("Cannot set socket option SO_BROADCAST"));
277 #endif /* def SO_BROADCAST */
280 FD_SET (sock, &mask);
283 #endif /* def FD_SETSIZE */
284 nets = getbroadcastnets (addrs, sock, inbuf);
285 bzero ((char *) &baddr, sizeof (baddr));
286 baddr.sin_family = AF_INET;
287 baddr.sin_port = htons (PMAPPORT);
288 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
289 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
290 (void) gettimeofday (&t, (struct timezone *) 0);
291 msg.rm_xid = xid = getpid () ^ t.tv_sec ^ t.tv_usec;
293 msg.rm_direction = CALL;
294 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
295 msg.rm_call.cb_prog = PMAPPROG;
296 msg.rm_call.cb_vers = PMAPVERS;
297 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
298 msg.rm_call.cb_cred = unix_auth->ah_cred;
299 msg.rm_call.cb_verf = unix_auth->ah_verf;
306 r.xdr_results = xresults;
307 r.results_ptr = resultsp;
308 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
309 if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
311 stat = RPC_CANTENCODEARGS;
314 outlen = (int) xdr_getpos (xdrs);
317 * Basic loop: broadcast a packet and wait a while for response(s).
318 * The response timeout grows larger per iteration.
320 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
322 for (i = 0; i < nets; i++)
324 baddr.sin_addr = addrs[i];
325 if (sendto (sock, outbuf, outlen, 0,
326 (struct sockaddr *) &baddr,
327 sizeof (struct sockaddr)) != outlen)
329 perror (_("Cannot send broadcast packet"));
334 if (eachresult == NULL)
340 msg.acpted_rply.ar_verf = _null_auth;
341 msg.acpted_rply.ar_results.where = (caddr_t) & r;
342 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
345 switch (select (_rpc_dtablesize (), &readfds, (fd_set *) NULL,
346 (fd_set *) NULL, &t1))
349 case 0: /* timed out */
353 case -1: /* some kind of error */
356 perror (_("Broadcast select problem"));
360 } /* end of select results switch */
362 fromlen = sizeof (struct sockaddr);
363 inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
364 (struct sockaddr *) &raddr, &fromlen);
369 perror (_("Cannot receive reply to broadcast"));
373 if (inlen < sizeof (u_long))
376 * see if reply transaction id matches sent id.
377 * If so, decode the results.
379 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
380 if (xdr_replymsg (xdrs, &msg))
382 if ((msg.rm_xid == xid) &&
383 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
384 (msg.acpted_rply.ar_stat == SUCCESS))
386 raddr.sin_port = htons ((u_short) port);
387 done = (*eachresult) (resultsp, &raddr);
389 /* otherwise, we just ignore the errors ... */
394 /* some kind of deserialization problem ... */
395 if (msg.rm_xid == xid)
396 fprintf (stderr, "Broadcast deserialization problem");
397 /* otherwise, just random garbage */
400 xdrs->x_op = XDR_FREE;
401 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
402 (void) xdr_replymsg (xdrs, &msg);
403 (void) (*xresults) (xdrs, resultsp);
417 AUTH_DESTROY (unix_auth);