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Commit | Line | Data |
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28f540f4 RM |
1 | /* |
2 | * pmap_rmt.c | |
3 | * Client interface to pmap rpc service. | |
4 | * remote call and broadcast service | |
5 | * | |
a7ab6ec8 UD |
6 | * Copyright (c) 2010, Oracle America, Inc. |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions are | |
10 | * met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * * Redistributions in binary form must reproduce the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer in the documentation and/or other materials | |
17 | * provided with the distribution. | |
18 | * * Neither the name of the "Oracle America, Inc." nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
25 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
26 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
27 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE | |
29 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
31 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
33 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28f540f4 RM |
34 | */ |
35 | ||
e7fd8a39 UD |
36 | #include <unistd.h> |
37 | #include <string.h> | |
4360eafd | 38 | #include <libintl.h> |
28f540f4 RM |
39 | #include <rpc/rpc.h> |
40 | #include <rpc/pmap_prot.h> | |
41 | #include <rpc/pmap_clnt.h> | |
42 | #include <rpc/pmap_rmt.h> | |
099a6fbd | 43 | #include <sys/poll.h> |
28f540f4 RM |
44 | #include <sys/socket.h> |
45 | #include <stdio.h> | |
46 | #include <errno.h> | |
47 | #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */ | |
48 | #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */ | |
49 | #include <net/if.h> | |
412c954a | 50 | #include <ifaddrs.h> |
28f540f4 RM |
51 | #include <sys/ioctl.h> |
52 | #include <arpa/inet.h> | |
53 | #define MAX_BROADCAST_SIZE 1400 | |
54 | ||
090ca000 UD |
55 | extern u_long _create_xid (void); |
56 | ||
c4563d2d | 57 | static const struct timeval timeout = {3, 0}; |
28f540f4 RM |
58 | |
59 | /* | |
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. | |
e7fd8a39 | 65 | */ |
28f540f4 | 66 | enum clnt_stat |
e7fd8a39 UD |
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; | |
71 | caddr_t argsp, resp; | |
72 | struct timeval tout; | |
73 | u_long *port_ptr; | |
28f540f4 | 74 | { |
e7fd8a39 UD |
75 | int socket = -1; |
76 | CLIENT *client; | |
77 | struct rmtcallargs a; | |
78 | struct rmtcallres r; | |
79 | enum clnt_stat stat; | |
28f540f4 | 80 | |
e7fd8a39 | 81 | addr->sin_port = htons (PMAPPORT); |
7b57bfe5 | 82 | client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &socket); |
e7fd8a39 UD |
83 | if (client != (CLIENT *) NULL) |
84 | { | |
85 | a.prog = prog; | |
86 | a.vers = vers; | |
87 | a.proc = proc; | |
88 | a.args_ptr = argsp; | |
89 | a.xdr_args = xdrargs; | |
90 | r.port_ptr = port_ptr; | |
91 | r.results_ptr = resp; | |
92 | r.xdr_results = xdrres; | |
77fe0b9c | 93 | stat = CLNT_CALL (client, PMAPPROC_CALLIT, |
7b57bfe5 UD |
94 | (xdrproc_t)xdr_rmtcall_args, |
95 | (caddr_t)&a, (xdrproc_t)xdr_rmtcallres, | |
e7fd8a39 UD |
96 | (caddr_t)&r, tout); |
97 | CLNT_DESTROY (client); | |
98 | } | |
99 | else | |
100 | { | |
101 | stat = RPC_FAILED; | |
102 | } | |
50304ef0 | 103 | /* (void)__close(socket); CLNT_DESTROY already closed it */ |
e7fd8a39 UD |
104 | addr->sin_port = 0; |
105 | return stat; | |
28f540f4 | 106 | } |
7b57bfe5 | 107 | libc_hidden_nolink (pmap_rmtcall, GLIBC_2_0) |
28f540f4 RM |
108 | |
109 | ||
110 | /* | |
111 | * XDR remote call arguments | |
112 | * written for XDR_ENCODE direction only | |
113 | */ | |
114 | bool_t | |
090ca000 | 115 | xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap) |
28f540f4 | 116 | { |
e7fd8a39 | 117 | u_int lenposition, argposition, position; |
28f540f4 | 118 | |
7b57bfe5 UD |
119 | if (xdr_u_long (xdrs, &(cap->prog)) && |
120 | xdr_u_long (xdrs, &(cap->vers)) && | |
121 | xdr_u_long (xdrs, &(cap->proc))) | |
e7fd8a39 | 122 | { |
7a50b1f6 | 123 | u_long dummy_arglen = 0; |
e7fd8a39 | 124 | lenposition = XDR_GETPOS (xdrs); |
7b57bfe5 | 125 | if (!xdr_u_long (xdrs, &dummy_arglen)) |
e7fd8a39 UD |
126 | return FALSE; |
127 | argposition = XDR_GETPOS (xdrs); | |
128 | if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr)) | |
129 | return FALSE; | |
130 | position = XDR_GETPOS (xdrs); | |
131 | cap->arglen = (u_long) position - (u_long) argposition; | |
132 | XDR_SETPOS (xdrs, lenposition); | |
7b57bfe5 | 133 | if (!xdr_u_long (xdrs, &(cap->arglen))) |
e7fd8a39 UD |
134 | return FALSE; |
135 | XDR_SETPOS (xdrs, position); | |
136 | return TRUE; | |
137 | } | |
138 | return FALSE; | |
28f540f4 | 139 | } |
7b57bfe5 | 140 | libc_hidden_nolink (xdr_rmtcall_args, GLIBC_2_0) |
28f540f4 RM |
141 | |
142 | /* | |
143 | * XDR remote call results | |
144 | * written for XDR_DECODE direction only | |
145 | */ | |
146 | bool_t | |
e7fd8a39 UD |
147 | xdr_rmtcallres (xdrs, crp) |
148 | XDR *xdrs; | |
149 | struct rmtcallres *crp; | |
28f540f4 | 150 | { |
e7fd8a39 | 151 | caddr_t port_ptr; |
28f540f4 | 152 | |
e7fd8a39 | 153 | port_ptr = (caddr_t) crp->port_ptr; |
7b57bfe5 UD |
154 | if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), |
155 | (xdrproc_t) xdr_u_long) | |
156 | && xdr_u_long (xdrs, &crp->resultslen)) | |
e7fd8a39 UD |
157 | { |
158 | crp->port_ptr = (u_long *) port_ptr; | |
159 | return (*(crp->xdr_results)) (xdrs, crp->results_ptr); | |
160 | } | |
161 | return FALSE; | |
28f540f4 | 162 | } |
7b57bfe5 | 163 | libc_hidden_nolink (xdr_rmtcallres, GLIBC_2_0) |
28f540f4 RM |
164 | |
165 | ||
166 | /* | |
167 | * The following is kludged-up support for simple rpc broadcasts. | |
cbd3dceb | 168 | * Someday a large, complicated system will replace these trivial |
28f540f4 RM |
169 | * routines which only support udp/ip . |
170 | */ | |
171 | ||
172 | static int | |
dfd2257a | 173 | internal_function |
412c954a | 174 | getbroadcastnets (struct in_addr *addrs, int naddrs) |
28f540f4 | 175 | { |
412c954a | 176 | struct ifaddrs *ifa; |
28f540f4 | 177 | |
6c81dc42 | 178 | if (getifaddrs (&ifa) != 0) |
e7fd8a39 | 179 | { |
412c954a UD |
180 | perror ("broadcast: getifaddrs"); |
181 | return 0; | |
e7fd8a39 | 182 | } |
412c954a UD |
183 | |
184 | int i = 0; | |
185 | struct ifaddrs *run = ifa; | |
186 | while (run != NULL && i < naddrs) | |
e7fd8a39 | 187 | { |
412c954a UD |
188 | if ((run->ifa_flags & IFF_BROADCAST) != 0 |
189 | && (run->ifa_flags & IFF_UP) != 0 | |
f7e7a396 | 190 | && run->ifa_addr != NULL |
412c954a UD |
191 | && run->ifa_addr->sa_family == AF_INET) |
192 | /* Copy the broadcast address. */ | |
193 | addrs[i++] = ((struct sockaddr_in *) run->ifa_broadaddr)->sin_addr; | |
194 | ||
195 | run = run->ifa_next; | |
e7fd8a39 | 196 | } |
412c954a UD |
197 | |
198 | freeifaddrs (ifa); | |
199 | ||
e7fd8a39 | 200 | return i; |
28f540f4 RM |
201 | } |
202 | ||
28f540f4 | 203 | |
cbd3dceb | 204 | enum clnt_stat |
e7fd8a39 UD |
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 */ | |
28f540f4 | 214 | { |
a1129917 | 215 | enum clnt_stat stat = RPC_FAILED; |
7b57bfe5 | 216 | AUTH *unix_auth = authunix_create_default (); |
e7fd8a39 UD |
217 | XDR xdr_stream; |
218 | XDR *xdrs = &xdr_stream; | |
090ca000 | 219 | struct timeval t; |
f671aeab | 220 | int outlen, inlen, nets; |
41df5ed4 | 221 | socklen_t fromlen; |
e7fd8a39 UD |
222 | int sock; |
223 | int on = 1; | |
099a6fbd UD |
224 | struct pollfd fd; |
225 | int milliseconds; | |
e7fd8a39 UD |
226 | int i; |
227 | bool_t done = FALSE; | |
228 | u_long xid; | |
229 | u_long port; | |
230 | struct in_addr addrs[20]; | |
231 | struct sockaddr_in baddr, raddr; /* broadcast and response addresses */ | |
232 | struct rmtcallargs a; | |
233 | struct rmtcallres r; | |
234 | struct rpc_msg msg; | |
e7fd8a39 | 235 | char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE]; |
28f540f4 | 236 | |
e7fd8a39 UD |
237 | /* |
238 | * initialization: create a socket, a broadcast address, and | |
239 | * preserialize the arguments into a send buffer. | |
240 | */ | |
50304ef0 | 241 | if ((sock = __socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
e7fd8a39 UD |
242 | { |
243 | perror (_("Cannot create socket for broadcast rpc")); | |
244 | stat = RPC_CANTSEND; | |
245 | goto done_broad; | |
246 | } | |
28f540f4 | 247 | #ifdef SO_BROADCAST |
b2bffca2 | 248 | if (__setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) |
e7fd8a39 UD |
249 | { |
250 | perror (_("Cannot set socket option SO_BROADCAST")); | |
251 | stat = RPC_CANTSEND; | |
252 | goto done_broad; | |
253 | } | |
28f540f4 | 254 | #endif /* def SO_BROADCAST */ |
099a6fbd UD |
255 | fd.fd = sock; |
256 | fd.events = POLLIN; | |
412c954a | 257 | nets = getbroadcastnets (addrs, sizeof (addrs) / sizeof (addrs[0])); |
50304ef0 | 258 | __bzero ((char *) &baddr, sizeof (baddr)); |
e7fd8a39 UD |
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); */ | |
090ca000 | 263 | msg.rm_xid = xid = _create_xid (); |
e7fd8a39 UD |
264 | t.tv_usec = 0; |
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; | |
272 | a.prog = prog; | |
273 | a.vers = vers; | |
274 | a.proc = proc; | |
275 | a.xdr_args = xargs; | |
276 | a.args_ptr = argsp; | |
277 | r.port_ptr = &port; | |
278 | r.xdr_results = xresults; | |
279 | r.results_ptr = resultsp; | |
7b57bfe5 UD |
280 | xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE); |
281 | if ((!xdr_callmsg (xdrs, &msg)) | |
282 | || (!xdr_rmtcall_args (xdrs, &a))) | |
e7fd8a39 UD |
283 | { |
284 | stat = RPC_CANTENCODEARGS; | |
285 | goto done_broad; | |
286 | } | |
287 | outlen = (int) xdr_getpos (xdrs); | |
288 | xdr_destroy (xdrs); | |
289 | /* | |
290 | * Basic loop: broadcast a packet and wait a while for response(s). | |
291 | * The response timeout grows larger per iteration. | |
292 | */ | |
293 | for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) | |
294 | { | |
295 | for (i = 0; i < nets; i++) | |
296 | { | |
297 | baddr.sin_addr = addrs[i]; | |
b2bffca2 UD |
298 | if (__sendto (sock, outbuf, outlen, 0, |
299 | (struct sockaddr *) &baddr, | |
300 | sizeof (struct sockaddr)) != outlen) | |
e7fd8a39 UD |
301 | { |
302 | perror (_("Cannot send broadcast packet")); | |
303 | stat = RPC_CANTSEND; | |
304 | goto done_broad; | |
305 | } | |
28f540f4 | 306 | } |
e7fd8a39 UD |
307 | if (eachresult == NULL) |
308 | { | |
309 | stat = RPC_SUCCESS; | |
310 | goto done_broad; | |
311 | } | |
312 | recv_again: | |
313 | msg.acpted_rply.ar_verf = _null_auth; | |
314 | msg.acpted_rply.ar_results.where = (caddr_t) & r; | |
7b57bfe5 | 315 | msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres; |
099a6fbd UD |
316 | milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000; |
317 | switch (__poll(&fd, 1, milliseconds)) | |
e7fd8a39 | 318 | { |
28f540f4 | 319 | |
e7fd8a39 UD |
320 | case 0: /* timed out */ |
321 | stat = RPC_TIMEDOUT; | |
322 | continue; | |
28f540f4 | 323 | |
e7fd8a39 UD |
324 | case -1: /* some kind of error */ |
325 | if (errno == EINTR) | |
326 | goto recv_again; | |
099a6fbd | 327 | perror (_("Broadcast poll problem")); |
e7fd8a39 UD |
328 | stat = RPC_CANTRECV; |
329 | goto done_broad; | |
28f540f4 | 330 | |
099a6fbd | 331 | } /* end of poll results switch */ |
e7fd8a39 UD |
332 | try_again: |
333 | fromlen = sizeof (struct sockaddr); | |
b2bffca2 UD |
334 | inlen = __recvfrom (sock, inbuf, UDPMSGSIZE, 0, |
335 | (struct sockaddr *) &raddr, &fromlen); | |
e7fd8a39 UD |
336 | if (inlen < 0) |
337 | { | |
338 | if (errno == EINTR) | |
339 | goto try_again; | |
340 | perror (_("Cannot receive reply to broadcast")); | |
341 | stat = RPC_CANTRECV; | |
342 | goto done_broad; | |
343 | } | |
1f205a47 | 344 | if ((size_t) inlen < sizeof (u_long)) |
e7fd8a39 UD |
345 | goto recv_again; |
346 | /* | |
347 | * see if reply transaction id matches sent id. | |
348 | * If so, decode the results. | |
349 | */ | |
7b57bfe5 UD |
350 | xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE); |
351 | if (xdr_replymsg (xdrs, &msg)) | |
e7fd8a39 | 352 | { |
5512461f | 353 | if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) && |
e7fd8a39 UD |
354 | (msg.rm_reply.rp_stat == MSG_ACCEPTED) && |
355 | (msg.acpted_rply.ar_stat == SUCCESS)) | |
356 | { | |
357 | raddr.sin_port = htons ((u_short) port); | |
358 | done = (*eachresult) (resultsp, &raddr); | |
359 | } | |
360 | /* otherwise, we just ignore the errors ... */ | |
361 | } | |
362 | else | |
363 | { | |
28f540f4 | 364 | #ifdef notdef |
e7fd8a39 | 365 | /* some kind of deserialization problem ... */ |
5512461f | 366 | if ((u_int32_t) msg.rm_xid == (u_int32_t) xid) |
e7fd8a39 UD |
367 | fprintf (stderr, "Broadcast deserialization problem"); |
368 | /* otherwise, just random garbage */ | |
28f540f4 | 369 | #endif |
28f540f4 | 370 | } |
e7fd8a39 | 371 | xdrs->x_op = XDR_FREE; |
7b57bfe5 UD |
372 | msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; |
373 | (void) xdr_replymsg (xdrs, &msg); | |
e7fd8a39 UD |
374 | (void) (*xresults) (xdrs, resultsp); |
375 | xdr_destroy (xdrs); | |
376 | if (done) | |
377 | { | |
378 | stat = RPC_SUCCESS; | |
379 | goto done_broad; | |
380 | } | |
381 | else | |
382 | { | |
383 | goto recv_again; | |
384 | } | |
385 | } | |
28f540f4 | 386 | done_broad: |
50304ef0 | 387 | (void) __close (sock); |
e7fd8a39 UD |
388 | AUTH_DESTROY (unix_auth); |
389 | return stat; | |
28f540f4 | 390 | } |
7b57bfe5 | 391 | libc_hidden_nolink (clnt_broadcast, GLIBC_2_0) |