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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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.
48 #include <rpc/pmap_prot.h>
49 #include <rpc/pmap_clnt.h>
50 #include <rpc/pmap_rmt.h>
52 #include <sys/socket.h>
55 #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
56 #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
58 #include <sys/ioctl.h>
59 #include <arpa/inet.h>
60 #define MAX_BROADCAST_SIZE 1400
64 extern u_long _create_xid (void) attribute_hidden;
66 static const struct timeval timeout = {3, 0};
69 * pmapper remote-call-service interface.
70 * This routine is used to call the pmapper remote call service
71 * which will look up a service program in the port maps, and then
72 * remotely call that routine with the given parameters. This allows
73 * programs to do a lookup and call in one step.
76 pmap_rmtcall (struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
77 xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
78 struct timeval tout, u_long *port_ptr)
86 addr->sin_port = htons (PMAPPORT);
87 client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &_socket);
88 if (client != (CLIENT *) NULL)
95 r.port_ptr = port_ptr;
97 r.xdr_results = xdrres;
98 stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,
99 (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,
101 CLNT_DESTROY (client);
107 /* (void)close(_socket); CLNT_DESTROY already closed it */
114 * XDR remote call arguments
115 * written for XDR_ENCODE direction only
118 xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
120 u_int lenposition, argposition, position;
122 if (xdr_u_long (xdrs, &(cap->prog)) &&
123 xdr_u_long (xdrs, &(cap->vers)) &&
124 xdr_u_long (xdrs, &(cap->proc)))
126 u_long dummy_arglen = 0;
127 lenposition = XDR_GETPOS (xdrs);
128 if (!xdr_u_long (xdrs, &dummy_arglen))
130 argposition = XDR_GETPOS (xdrs);
131 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
133 position = XDR_GETPOS (xdrs);
134 cap->arglen = (u_long) position - (u_long) argposition;
135 XDR_SETPOS (xdrs, lenposition);
136 if (!xdr_u_long (xdrs, &(cap->arglen)))
138 XDR_SETPOS (xdrs, position);
143 libc_hidden_def(xdr_rmtcall_args)
146 * XDR remote call results
147 * written for XDR_DECODE direction only
150 xdr_rmtcallres (XDR *xdrs, struct rmtcallres *crp)
154 port_ptr = (caddr_t) crp->port_ptr;
155 if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)
156 && xdr_u_long (xdrs, &crp->resultslen))
158 crp->port_ptr = (u_long *) port_ptr;
159 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
163 libc_hidden_def(xdr_rmtcallres)
167 * The following is kludged-up support for simple rpc broadcasts.
168 * Someday a large, complicated system will replace these trivial
169 * routines which only support udp/ip .
174 getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
175 /* int sock: any valid socket will do */
176 /* char *buf: why allocate more when we can use existing... */
179 struct ifreq ifreq, *ifr;
180 struct sockaddr_in *sin;
183 ifc.ifc_len = UDPMSGSIZE;
185 if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
187 perror (_("broadcast: ioctl (get interface configuration)"));
191 for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
194 if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
196 perror (_("broadcast: ioctl (get interface flags)"));
199 if ((ifreq.ifr_flags & IFF_BROADCAST) &&
200 (ifreq.ifr_flags & IFF_UP) &&
201 ifr->ifr_addr.sa_family == AF_INET)
203 sin = (struct sockaddr_in *) &ifr->ifr_addr;
204 #ifdef SIOCGIFBRDADDR /* 4.3BSD */
205 if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
207 addrs[i++] = inet_makeaddr (inet_netof
208 /* Changed to pass struct instead of s_addr member
210 (sin->sin_addr), INADDR_ANY);
214 addrs[i++] = ((struct sockaddr_in *)
215 &ifreq.ifr_addr)->sin_addr;
218 addrs[i++] = inet_makeaddr (inet_netof
219 (sin->sin_addr.s_addr), INADDR_ANY);
229 u_long prog, /* program number */
230 u_long vers, /* version number */
231 u_long proc, /* procedure number */
232 xdrproc_t xargs, /* xdr routine for args */
233 caddr_t argsp, /* pointer to args */
234 xdrproc_t xresults, /* xdr routine for results */
235 caddr_t resultsp, /* pointer to results */
236 resultproc_t eachresult /* call with each result obtained */)
238 enum clnt_stat stat = RPC_FAILED;
239 AUTH *unix_auth = authunix_create_default ();
241 XDR *xdrs = &xdr_stream;
243 int outlen, inlen, nets;
253 struct in_addr addrs[20];
254 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
255 struct rmtcallargs a;
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 nets = getbroadcastnets (addrs, sock, inbuf);
281 memset ((char *) &baddr, 0, sizeof (baddr));
282 baddr.sin_family = AF_INET;
283 baddr.sin_port = htons (PMAPPORT);
284 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
285 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
286 msg.rm_xid = xid = _create_xid ();
288 msg.rm_direction = CALL;
289 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
290 msg.rm_call.cb_prog = PMAPPROG;
291 msg.rm_call.cb_vers = PMAPVERS;
292 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
293 msg.rm_call.cb_cred = unix_auth->ah_cred;
294 msg.rm_call.cb_verf = unix_auth->ah_verf;
301 r.xdr_results = xresults;
302 r.results_ptr = resultsp;
303 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
304 if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
306 stat = RPC_CANTENCODEARGS;
309 outlen = (int) xdr_getpos (xdrs);
312 * Basic loop: broadcast a packet and wait a while for response(s).
313 * The response timeout grows larger per iteration.
315 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
317 for (i = 0; i < nets; i++)
319 baddr.sin_addr = addrs[i];
320 if (sendto (sock, outbuf, outlen, 0,
321 (struct sockaddr *) &baddr,
322 sizeof (struct sockaddr)) != outlen)
324 perror (_("Cannot send broadcast packet"));
329 if (eachresult == NULL)
335 msg.acpted_rply.ar_verf = _null_auth;
336 msg.acpted_rply.ar_results.where = (caddr_t) & r;
337 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
338 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
339 switch (poll(&fd, 1, milliseconds))
342 case 0: /* timed out */
346 case -1: /* some kind of error */
349 perror (_("Broadcast poll problem"));
353 } /* end of poll results switch */
355 fromlen = sizeof (struct sockaddr);
356 inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
357 (struct sockaddr *) &raddr, &fromlen);
362 perror (_("Cannot receive reply to broadcast"));
366 if ((size_t) inlen < sizeof (u_long))
369 * see if reply transaction id matches sent id.
370 * If so, decode the results.
372 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
373 if (xdr_replymsg (xdrs, &msg))
375 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
376 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
377 (msg.acpted_rply.ar_stat == SUCCESS))
379 raddr.sin_port = htons ((u_short) port);
380 done = (*eachresult) (resultsp, &raddr);
382 /* otherwise, we just ignore the errors ... */
387 /* some kind of deserialization problem ... */
388 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
389 fprintf (stderr, "Broadcast deserialization problem");
390 /* otherwise, just random garbage */
393 xdrs->x_op = XDR_FREE;
394 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
395 (void) xdr_replymsg (xdrs, &msg);
396 (void) (*xresults) (xdrs, resultsp);
410 AUTH_DESTROY (unix_auth);