1 /* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */
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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.
44 #include "rpc_private.h"
45 #include <rpc/pmap_prot.h>
46 #include <rpc/pmap_clnt.h>
47 #include <rpc/pmap_rmt.h>
49 #include <sys/socket.h>
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 const 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 (struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc,
69 xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp,
70 struct timeval tout, u_long *port_ptr)
78 addr->sin_port = htons (PMAPPORT);
79 client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &_socket);
80 if (client != (CLIENT *) NULL)
87 r.port_ptr = port_ptr;
89 r.xdr_results = xdrres;
90 stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,
91 (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,
93 CLNT_DESTROY (client);
99 /* (void)close(_socket); CLNT_DESTROY already closed it */
106 * XDR remote call arguments
107 * written for XDR_ENCODE direction only
110 xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)
112 u_int lenposition, argposition, position;
114 if (xdr_u_long (xdrs, &(cap->prog)) &&
115 xdr_u_long (xdrs, &(cap->vers)) &&
116 xdr_u_long (xdrs, &(cap->proc)))
118 u_long dummy_arglen = 0;
119 lenposition = XDR_GETPOS (xdrs);
120 if (!xdr_u_long (xdrs, &dummy_arglen))
122 argposition = XDR_GETPOS (xdrs);
123 if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))
125 position = XDR_GETPOS (xdrs);
126 cap->arglen = (u_long) position - (u_long) argposition;
127 XDR_SETPOS (xdrs, lenposition);
128 if (!xdr_u_long (xdrs, &(cap->arglen)))
130 XDR_SETPOS (xdrs, position);
135 libc_hidden_def(xdr_rmtcall_args)
138 * XDR remote call results
139 * written for XDR_DECODE direction only
142 xdr_rmtcallres (XDR *xdrs, struct rmtcallres *crp)
146 port_ptr = (caddr_t) crp->port_ptr;
147 if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)
148 && xdr_u_long (xdrs, &crp->resultslen))
150 crp->port_ptr = (u_long *) port_ptr;
151 return (*(crp->xdr_results)) (xdrs, crp->results_ptr);
155 libc_hidden_def(xdr_rmtcallres)
159 * The following is kludged-up support for simple rpc broadcasts.
160 * Someday a large, complicated system will replace these trivial
161 * routines which only support udp/ip .
166 getbroadcastnets (struct in_addr *addrs, int sock, char *buf)
167 /* int sock: any valid socket will do */
168 /* char *buf: why allocate more when we can use existing... */
171 struct ifreq ifreq, *ifr;
172 struct sockaddr_in *sin;
175 ifc.ifc_len = UDPMSGSIZE;
177 if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)
179 perror (_("broadcast: ioctl (get interface configuration)"));
183 for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)
186 if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)
188 perror (_("broadcast: ioctl (get interface flags)"));
191 if ((ifreq.ifr_flags & IFF_BROADCAST) &&
192 (ifreq.ifr_flags & IFF_UP) &&
193 ifr->ifr_addr.sa_family == AF_INET)
195 sin = (struct sockaddr_in *) &ifr->ifr_addr;
196 #ifdef SIOCGIFBRDADDR /* 4.3BSD */
197 if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)
199 addrs[i++] = inet_makeaddr (inet_netof
200 /* Changed to pass struct instead of s_addr member
202 (sin->sin_addr), INADDR_ANY);
206 addrs[i++] = ((struct sockaddr_in *)
207 &ifreq.ifr_addr)->sin_addr;
210 addrs[i++] = inet_makeaddr (inet_netof
211 (sin->sin_addr.s_addr), INADDR_ANY);
221 u_long prog, /* program number */
222 u_long vers, /* version number */
223 u_long proc, /* procedure number */
224 xdrproc_t xargs, /* xdr routine for args */
225 caddr_t argsp, /* pointer to args */
226 xdrproc_t xresults, /* xdr routine for results */
227 caddr_t resultsp, /* pointer to results */
228 resultproc_t eachresult /* call with each result obtained */)
230 enum clnt_stat stat = RPC_FAILED;
231 AUTH *unix_auth = authunix_create_default ();
233 XDR *xdrs = &xdr_stream;
235 int outlen, inlen, nets;
245 struct in_addr addrs[20];
246 struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
247 struct rmtcallargs a;
250 char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
253 * initialization: create a socket, a broadcast address, and
254 * preserialize the arguments into a send buffer.
256 if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)
258 perror (_("Cannot create socket for broadcast rpc"));
263 if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)
265 perror (_("Cannot set socket option SO_BROADCAST"));
269 #endif /* def SO_BROADCAST */
272 nets = getbroadcastnets (addrs, sock, inbuf);
273 memset ((char *) &baddr, 0, sizeof (baddr));
274 baddr.sin_family = AF_INET;
275 baddr.sin_port = htons (PMAPPORT);
276 baddr.sin_addr.s_addr = htonl (INADDR_ANY);
277 /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
278 msg.rm_xid = xid = _create_xid ();
280 msg.rm_direction = CALL;
281 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
282 msg.rm_call.cb_prog = PMAPPROG;
283 msg.rm_call.cb_vers = PMAPVERS;
284 msg.rm_call.cb_proc = PMAPPROC_CALLIT;
285 msg.rm_call.cb_cred = unix_auth->ah_cred;
286 msg.rm_call.cb_verf = unix_auth->ah_verf;
293 r.xdr_results = xresults;
294 r.results_ptr = resultsp;
295 xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
296 if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))
298 stat = RPC_CANTENCODEARGS;
301 outlen = (int) xdr_getpos (xdrs);
304 * Basic loop: broadcast a packet and wait a while for response(s).
305 * The response timeout grows larger per iteration.
307 for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)
309 for (i = 0; i < nets; i++)
311 baddr.sin_addr = addrs[i];
312 if (sendto (sock, outbuf, outlen, 0,
313 (struct sockaddr *) &baddr,
314 sizeof (struct sockaddr)) != outlen)
316 perror (_("Cannot send broadcast packet"));
321 if (eachresult == NULL)
327 msg.acpted_rply.ar_verf = _null_auth;
328 msg.acpted_rply.ar_results.where = (caddr_t) & r;
329 msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;
330 milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;
331 switch (poll(&fd, 1, milliseconds))
334 case 0: /* timed out */
338 case -1: /* some kind of error */
341 perror (_("Broadcast poll problem"));
345 } /* end of poll results switch */
347 fromlen = sizeof (struct sockaddr);
348 inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,
349 (struct sockaddr *) &raddr, &fromlen);
354 perror (_("Cannot receive reply to broadcast"));
358 if ((size_t) inlen < sizeof (u_long))
361 * see if reply transaction id matches sent id.
362 * If so, decode the results.
364 xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);
365 if (xdr_replymsg (xdrs, &msg))
367 if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&
368 (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
369 (msg.acpted_rply.ar_stat == SUCCESS))
371 raddr.sin_port = htons ((u_short) port);
372 done = (*eachresult) (resultsp, &raddr);
374 /* otherwise, we just ignore the errors ... */
379 /* some kind of deserialization problem ... */
380 if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)
381 fprintf (stderr, "Broadcast deserialization problem");
382 /* otherwise, just random garbage */
385 xdrs->x_op = XDR_FREE;
386 msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
387 (void) xdr_replymsg (xdrs, &msg);
388 (void) (*xresults) (xdrs, resultsp);
402 AUTH_DESTROY (unix_auth);