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.
45 #include <rpc/pmap_prot.h>
46 #include <rpc/pmap_clnt.h>
47 #include <rpc/pmap_rmt.h>
49 #include <sys/socket.h>
52 #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
53 #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
55 #include <sys/ioctl.h>
56 #include <arpa/inet.h>
57 #define MAX_BROADCAST_SIZE 1400
59 extern u_long _create_xid (void);
61 static const struct timeval timeout = {3, 0};
64 * pmapper remote-call-service interface.
65 * This routine is used to call the pmapper remote call service
66 * which will look up a service program in the port maps, and then
67 * remotely call that routine with the given parameters. This allows
68 * programs to do a lookup and call in one step.
71 pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
72 struct sockaddr_in *addr;
73 u_long prog, vers, proc;
74 xdrproc_t xdrargs, xdrres;
85 addr->sin_port = htons (PMAPPORT);
86 client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &socket);
87 if (client != (CLIENT *) NULL)
94 r.port_ptr = port_ptr;
96 r.xdr_results = xdrres;
97 stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,
98 (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,
100 CLNT_DESTROY (client);
106 /* (void)__close(socket); CLNT_DESTROY already closed it */
113 * XDR remote call arguments
114 * written for XDR_ENCODE direction only
117 xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
119 u_int lenposition, argposition, position;
121 if (xdr_u_long (xdrs, &(cap->prog)) &&
122 xdr_u_long (xdrs, &(cap->vers)) &&
123 xdr_u_long (xdrs, &(cap->proc)))
125 lenposition = XDR_GETPOS (xdrs);
126 if (!xdr_u_long (xdrs, &(cap->arglen)))
128 argposition = XDR_GETPOS (xdrs);
129 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
131 position = XDR_GETPOS (xdrs);
132 cap->arglen = (u_long) position - (u_long) argposition;
133 XDR_SETPOS (xdrs, lenposition);
134 if (!xdr_u_long (xdrs, &(cap->arglen)))
136 XDR_SETPOS (xdrs, position);
143 * XDR remote call results
144 * written for XDR_DECODE direction only
147 xdr_rmtcallres (xdrs, crp)
149 struct rmtcallres *crp;
153 port_ptr = (caddr_t) crp->port_ptr;
154 if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)
155 && xdr_u_long (xdrs, &crp->resultslen))
157 crp->port_ptr = (u_long *) port_ptr;
158 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
165 * The following is kludged-up support for simple rpc broadcasts.
166 * Someday a large, complicated system will replace these trivial
167 * routines which only support udp/ip .
172 getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
173 /* int sock: any valid socket will do */
174 /* char *buf: why allocate more when we can use existing... */
177 struct ifreq ifreq, *ifr;
178 struct sockaddr_in *sin;
181 ifc.ifc_len = UDPMSGSIZE;
183 if (__ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
185 perror (_("broadcast: ioctl (get interface configuration)"));
189 for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
192 if (__ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
194 perror (_("broadcast: ioctl (get interface flags)"));
197 if ((ifreq.ifr_flags & IFF_BROADCAST) &&
198 (ifreq.ifr_flags & IFF_UP) &&
199 ifr->ifr_addr.sa_family == AF_INET)
201 sin = (struct sockaddr_in *) &ifr->ifr_addr;
202 #ifdef SIOCGIFBRDADDR /* 4.3BSD */
203 if (__ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
205 addrs[i++] = inet_makeaddr (inet_netof
206 /* Changed to pass struct instead of s_addr member
208 (sin->sin_addr), INADDR_ANY);
212 addrs[i++] = ((struct sockaddr_in *)
213 &ifreq.ifr_addr)->sin_addr;
216 addrs[i++] = inet_makeaddr (inet_netof
217 (sin->sin_addr.s_addr), INADDR_ANY);
226 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
227 u_long prog; /* program number */
228 u_long vers; /* version number */
229 u_long proc; /* procedure number */
230 xdrproc_t xargs; /* xdr routine for args */
231 caddr_t argsp; /* pointer to args */
232 xdrproc_t xresults; /* xdr routine for results */
233 caddr_t resultsp; /* pointer to results */
234 resultproc_t eachresult; /* call with each result obtained */
236 enum clnt_stat stat = RPC_FAILED;
237 AUTH *unix_auth = authunix_create_default ();
239 XDR *xdrs = &xdr_stream;
241 int outlen, inlen, nets;
251 struct in_addr addrs[20];
252 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
253 struct rmtcallargs a;
256 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
259 * initialization: create a socket, a broadcast address, and
260 * preserialize the arguments into a send buffer.
262 if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
264 perror (_("Cannot create socket for broadcast rpc"));
269 if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
271 perror (_("Cannot set socket option SO_BROADCAST"));
275 #endif /* def SO_BROADCAST */
278 nets = getbroadcastnets (addrs, sock, inbuf);
279 __bzero ((char *) &baddr, sizeof (baddr));
280 baddr.sin_family = AF_INET;
281 baddr.sin_port = htons (PMAPPORT);
282 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
283 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
284 msg.rm_xid = xid = _create_xid ();
286 msg.rm_direction = CALL;
287 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
288 msg.rm_call.cb_prog = PMAPPROG;
289 msg.rm_call.cb_vers = PMAPVERS;
290 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
291 msg.rm_call.cb_cred = unix_auth->ah_cred;
292 msg.rm_call.cb_verf = unix_auth->ah_verf;
299 r.xdr_results = xresults;
300 r.results_ptr = resultsp;
301 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
302 if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
304 stat = RPC_CANTENCODEARGS;
307 outlen = (int) xdr_getpos (xdrs);
310 * Basic loop: broadcast a packet and wait a while for response(s).
311 * The response timeout grows larger per iteration.
313 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
315 for (i = 0; i < nets; i++)
317 baddr.sin_addr = addrs[i];
318 if (sendto (sock, outbuf, outlen, 0,
319 (struct sockaddr *) &baddr,
320 sizeof (struct sockaddr)) != outlen)
322 perror (_("Cannot send broadcast packet"));
327 if (eachresult == NULL)
333 msg.acpted_rply.ar_verf = _null_auth;
334 msg.acpted_rply.ar_results.where = (caddr_t) & r;
335 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
336 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
337 switch (__poll(&fd, 1, milliseconds))
340 case 0: /* timed out */
344 case -1: /* some kind of error */
347 perror (_("Broadcast poll problem"));
351 } /* end of poll results switch */
353 fromlen = sizeof (struct sockaddr);
354 inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
355 (struct sockaddr *) &raddr, &fromlen);
360 perror (_("Cannot receive reply to broadcast"));
364 if ((size_t) inlen < sizeof (u_long))
367 * see if reply transaction id matches sent id.
368 * If so, decode the results.
370 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
371 if (xdr_replymsg (xdrs, &msg))
373 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
374 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
375 (msg.acpted_rply.ar_stat == SUCCESS))
377 raddr.sin_port = htons ((u_short) port);
378 done = (*eachresult) (resultsp, &raddr);
380 /* otherwise, we just ignore the errors ... */
385 /* some kind of deserialization problem ... */
386 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
387 fprintf (stderr, "Broadcast deserialization problem");
388 /* otherwise, just random garbage */
391 xdrs->x_op = XDR_FREE;
392 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
393 (void) xdr_replymsg (xdrs, &msg);
394 (void) (*xresults) (xdrs, resultsp);
407 (void) __close (sock);
408 AUTH_DESTROY (unix_auth);