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 */
56 #include <sys/ioctl.h>
57 #include <arpa/inet.h>
58 #define MAX_BROADCAST_SIZE 1400
60 extern u_long _create_xid (void);
62 static const struct timeval timeout = {3, 0};
65 * pmapper remote-call-service interface.
66 * This routine is used to call the pmapper remote call service
67 * which will look up a service program in the port maps, and then
68 * remotely call that routine with the given parameters. This allows
69 * programs to do a lookup and call in one step.
72 pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
73 struct sockaddr_in *addr;
74 u_long prog, vers, proc;
75 xdrproc_t xdrargs, xdrres;
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 lenposition = XDR_GETPOS (xdrs);
127 if (!xdr_u_long (xdrs, &(cap->arglen)))
129 argposition = XDR_GETPOS (xdrs);
130 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
132 position = XDR_GETPOS (xdrs);
133 cap->arglen = (u_long) position - (u_long) argposition;
134 XDR_SETPOS (xdrs, lenposition);
135 if (!xdr_u_long (xdrs, &(cap->arglen)))
137 XDR_SETPOS (xdrs, position);
144 * XDR remote call results
145 * written for XDR_DECODE direction only
148 xdr_rmtcallres (xdrs, crp)
150 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);
166 * The following is kludged-up support for simple rpc broadcasts.
167 * Someday a large, complicated system will replace these trivial
168 * routines which only support udp/ip .
173 getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
174 /* int sock: any valid socket will do */
175 /* char *buf: why allocate more when we can use existing... */
178 struct ifreq ifreq, *ifr;
179 struct sockaddr_in *sin;
182 ifc.ifc_len = UDPMSGSIZE;
184 if (__ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
186 perror (_("broadcast: ioctl (get interface configuration)"));
190 for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
193 if (__ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
195 perror (_("broadcast: ioctl (get interface flags)"));
198 if ((ifreq.ifr_flags & IFF_BROADCAST) &&
199 (ifreq.ifr_flags & IFF_UP) &&
200 ifr->ifr_addr.sa_family == AF_INET)
202 sin = (struct sockaddr_in *) &ifr->ifr_addr;
203 #ifdef SIOCGIFBRDADDR /* 4.3BSD */
204 if (__ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
206 addrs[i++] = inet_makeaddr (inet_netof
207 /* Changed to pass struct instead of s_addr member
209 (sin->sin_addr), INADDR_ANY);
213 addrs[i++] = ((struct sockaddr_in *)
214 &ifreq.ifr_addr)->sin_addr;
217 addrs[i++] = inet_makeaddr (inet_netof
218 (sin->sin_addr.s_addr), INADDR_ANY);
227 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
228 u_long prog; /* program number */
229 u_long vers; /* version number */
230 u_long proc; /* procedure number */
231 xdrproc_t xargs; /* xdr routine for args */
232 caddr_t argsp; /* pointer to args */
233 xdrproc_t xresults; /* xdr routine for results */
234 caddr_t resultsp; /* pointer to results */
235 resultproc_t eachresult; /* call with each result obtained */
237 enum clnt_stat stat = RPC_FAILED;
238 AUTH *unix_auth = authunix_create_default ();
240 XDR *xdrs = &xdr_stream;
242 int outlen, inlen, nets;
252 struct in_addr addrs[20];
253 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
254 struct rmtcallargs a;
257 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
260 * initialization: create a socket, a broadcast address, and
261 * preserialize the arguments into a send buffer.
263 if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
265 perror (_("Cannot create socket for broadcast rpc"));
270 if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
272 perror (_("Cannot set socket option SO_BROADCAST"));
276 #endif /* def SO_BROADCAST */
279 nets = getbroadcastnets (addrs, sock, inbuf);
280 __bzero ((char *) &baddr, sizeof (baddr));
281 baddr.sin_family = AF_INET;
282 baddr.sin_port = htons (PMAPPORT);
283 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
284 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
285 msg.rm_xid = xid = _create_xid ();
287 msg.rm_direction = CALL;
288 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
289 msg.rm_call.cb_prog = PMAPPROG;
290 msg.rm_call.cb_vers = PMAPVERS;
291 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
292 msg.rm_call.cb_cred = unix_auth->ah_cred;
293 msg.rm_call.cb_verf = unix_auth->ah_verf;
300 r.xdr_results = xresults;
301 r.results_ptr = resultsp;
302 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
303 if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
305 stat = RPC_CANTENCODEARGS;
308 outlen = (int) xdr_getpos (xdrs);
311 * Basic loop: broadcast a packet and wait a while for response(s).
312 * The response timeout grows larger per iteration.
314 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
316 for (i = 0; i < nets; i++)
318 baddr.sin_addr = addrs[i];
319 if (sendto (sock, outbuf, outlen, 0,
320 (struct sockaddr *) &baddr,
321 sizeof (struct sockaddr)) != outlen)
323 perror (_("Cannot send broadcast packet"));
328 if (eachresult == NULL)
334 msg.acpted_rply.ar_verf = _null_auth;
335 msg.acpted_rply.ar_results.where = (caddr_t) & r;
336 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
337 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
338 switch (__poll(&fd, 1, milliseconds))
341 case 0: /* timed out */
345 case -1: /* some kind of error */
348 perror (_("Broadcast poll problem"));
352 } /* end of poll results switch */
354 fromlen = sizeof (struct sockaddr);
355 inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
356 (struct sockaddr *) &raddr, &fromlen);
361 perror (_("Cannot receive reply to broadcast"));
365 if ((size_t) inlen < sizeof (u_long))
368 * see if reply transaction id matches sent id.
369 * If so, decode the results.
371 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
372 if (xdr_replymsg (xdrs, &msg))
374 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
375 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
376 (msg.acpted_rply.ar_stat == SUCCESS))
378 raddr.sin_port = htons ((u_short) port);
379 done = (*eachresult) (resultsp, &raddr);
381 /* otherwise, we just ignore the errors ... */
386 /* some kind of deserialization problem ... */
387 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
388 fprintf (stderr, "Broadcast deserialization problem");
389 /* otherwise, just random garbage */
392 xdrs->x_op = XDR_FREE;
393 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
394 (void) xdr_replymsg (xdrs, &msg);
395 (void) (*xresults) (xdrs, resultsp);
408 (void) __close (sock);
409 AUTH_DESTROY (unix_auth);