3 * Client interface to pmap rpc service.
4 * remote call and broadcast service
6 * Copyright (c) 2010, Oracle America, Inc.
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40 #include <rpc/pmap_prot.h>
41 #include <rpc/pmap_clnt.h>
42 #include <rpc/pmap_rmt.h>
44 #include <sys/socket.h>
47 #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */
48 #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */
51 #include <sys/ioctl.h>
52 #include <arpa/inet.h>
53 #define MAX_BROADCAST_SIZE 1400
55 extern u_long _create_xid (void);
57 static const struct timeval timeout = {3, 0};
60 * pmapper remote-call-service interface.
61 * This routine is used to call the pmapper remote call service
62 * which will look up a service program in the port maps, and then
63 * remotely call that routine with the given parameters. This allows
64 * programs to do a lookup and call in one step.
67 pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
68 struct sockaddr_in *addr;
69 u_long prog, vers, proc;
70 xdrproc_t xdrargs, xdrres;
81 addr->sin_port = htons (PMAPPORT);
82 client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &socket);
83 if (client != (CLIENT *) NULL)
90 r.port_ptr = port_ptr;
92 r.xdr_results = xdrres;
93 stat = CLNT_CALL (client, PMAPPROC_CALLIT,
94 (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 */
107 libc_hidden_nolink_sunrpc (pmap_rmtcall, GLIBC_2_0)
111 * XDR remote call arguments
112 * written for XDR_ENCODE direction only
115 xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
117 u_int lenposition, argposition, position;
119 if (xdr_u_long (xdrs, &(cap->prog)) &&
120 xdr_u_long (xdrs, &(cap->vers)) &&
121 xdr_u_long (xdrs, &(cap->proc)))
123 u_long dummy_arglen = 0;
124 lenposition = XDR_GETPOS (xdrs);
125 if (!xdr_u_long (xdrs, &dummy_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);
140 libc_hidden_nolink_sunrpc (xdr_rmtcall_args, GLIBC_2_0)
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),
155 (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_nolink_sunrpc (xdr_rmtcallres, GLIBC_2_0)
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 naddrs)
178 if (getifaddrs (&ifa) != 0)
180 perror ("broadcast: getifaddrs");
185 struct ifaddrs *run = ifa;
186 while (run != NULL && i < naddrs)
188 if ((run->ifa_flags & IFF_BROADCAST) != 0
189 && (run->ifa_flags & IFF_UP) != 0
190 && run->ifa_addr != NULL
191 && run->ifa_addr->sa_family == AF_INET)
192 /* Copy the broadcast address. */
193 addrs[i++] = ((struct sockaddr_in *) run->ifa_broadaddr)->sin_addr;
205 clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
206 u_long prog; /* program number */
207 u_long vers; /* version number */
208 u_long proc; /* procedure number */
209 xdrproc_t xargs; /* xdr routine for args */
210 caddr_t argsp; /* pointer to args */
211 xdrproc_t xresults; /* xdr routine for results */
212 caddr_t resultsp; /* pointer to results */
213 resultproc_t eachresult; /* call with each result obtained */
215 enum clnt_stat stat = RPC_FAILED;
216 AUTH *unix_auth = authunix_create_default ();
218 XDR *xdrs = &xdr_stream;
220 int outlen, inlen, nets;
230 struct in_addr addrs[20];
231 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
232 struct rmtcallargs a;
235 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
238 * initialization: create a socket, a broadcast address, and
239 * preserialize the arguments into a send buffer.
241 if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
243 perror (_("Cannot create socket for broadcast rpc"));
248 if (__setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
250 perror (_("Cannot set socket option SO_BROADCAST"));
254 #endif /* def SO_BROADCAST */
257 nets = getbroadcastnets (addrs, sizeof (addrs) / sizeof (addrs[0]));
258 __bzero ((char *) &baddr, sizeof (baddr));
259 baddr.sin_family = AF_INET;
260 baddr.sin_port = htons (PMAPPORT);
261 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
262 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
263 msg.rm_xid = xid = _create_xid ();
265 msg.rm_direction = CALL;
266 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
267 msg.rm_call.cb_prog = PMAPPROG;
268 msg.rm_call.cb_vers = PMAPVERS;
269 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
270 msg.rm_call.cb_cred = unix_auth->ah_cred;
271 msg.rm_call.cb_verf = unix_auth->ah_verf;
278 r.xdr_results = xresults;
279 r.results_ptr = resultsp;
280 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
281 if ((!xdr_callmsg (xdrs, &msg))
282 || (!xdr_rmtcall_args (xdrs, &a)))
284 stat = RPC_CANTENCODEARGS;
287 outlen = (int) xdr_getpos (xdrs);
290 * Basic loop: broadcast a packet and wait a while for response(s).
291 * The response timeout grows larger per iteration.
293 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
295 for (i = 0; i < nets; i++)
297 baddr.sin_addr = addrs[i];
298 if (__sendto (sock, outbuf, outlen, 0,
299 (struct sockaddr *) &baddr,
300 sizeof (struct sockaddr)) != outlen)
302 perror (_("Cannot send broadcast packet"));
307 if (eachresult == NULL)
313 msg.acpted_rply.ar_verf = _null_auth;
314 msg.acpted_rply.ar_results.where = (caddr_t) & r;
315 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
316 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
317 switch (__poll(&fd, 1, milliseconds))
320 case 0: /* timed out */
324 case -1: /* some kind of error */
327 perror (_("Broadcast poll problem"));
331 } /* end of poll results switch */
333 fromlen = sizeof (struct sockaddr);
334 inlen = __recvfrom (sock, inbuf, UDPMSGSIZE, 0,
335 (struct sockaddr *) &raddr, &fromlen);
340 perror (_("Cannot receive reply to broadcast"));
344 if ((size_t) inlen < sizeof (u_long))
347 * see if reply transaction id matches sent id.
348 * If so, decode the results.
350 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
351 if (xdr_replymsg (xdrs, &msg))
353 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
354 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
355 (msg.acpted_rply.ar_stat == SUCCESS))
357 raddr.sin_port = htons ((u_short) port);
358 done = (*eachresult) (resultsp, &raddr);
360 /* otherwise, we just ignore the errors ... */
365 /* some kind of deserialization problem ... */
366 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
367 fprintf (stderr, "Broadcast deserialization problem");
368 /* otherwise, just random garbage */
371 xdrs->x_op = XDR_FREE;
372 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
373 (void) xdr_replymsg (xdrs, &msg);
374 (void) (*xresults) (xdrs, resultsp);
387 (void) __close (sock);
388 AUTH_DESTROY (unix_auth);
391 libc_hidden_nolink_sunrpc (clnt_broadcast, GLIBC_2_0)