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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [librpc/] [src/] [rpc/] [pmap_rmt.c] - Blame information for rev 173

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Line No. Rev Author Line
1 30 unneback
/*
2
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3
 * unrestricted use provided that this legend is included on all tape
4
 * media and as a part of the software program in whole or part.  Users
5
 * may copy or modify Sun RPC without charge, but are not authorized
6
 * to license or distribute it to anyone else except as part of a product or
7
 * program developed by the user.
8
 *
9
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12
 *
13
 * Sun RPC is provided with no support and without any obligation on the
14
 * part of Sun Microsystems, Inc. to assist in its use, correction,
15
 * modification or enhancement.
16
 *
17
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19
 * OR ANY PART THEREOF.
20
 *
21
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22
 * or profits or other special, indirect and consequential damages, even if
23
 * Sun has been advised of the possibility of such damages.
24
 *
25
 * Sun Microsystems, Inc.
26
 * 2550 Garcia Avenue
27
 * Mountain View, California  94043
28
 */
29
 
30
#if defined(LIBC_SCCS) && !defined(lint)
31
/*static char *sccsid = "from: @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";*/
32
/*static char *sccsid = "from: @(#)pmap_rmt.c   2.2 88/08/01 4.0 RPCSRC";*/
33
static char *rcsid = "$FreeBSD: src/lib/libc/rpc/pmap_rmt.c,v 1.15 2000/01/27 23:06:40 jasone Exp $";
34
#endif
35
 
36
/*
37
 * pmap_rmt.c
38
 * Client interface to pmap rpc service.
39
 * remote call and broadcast service
40
 *
41
 * Copyright (C) 1984, Sun Microsystems, Inc.
42
 */
43
 
44
#include <rpc/rpc.h>
45
#include <rpc/pmap_prot.h>
46
#include <rpc/pmap_clnt.h>
47
#include <rpc/pmap_rmt.h>
48
#include <sys/socket.h>
49
#include <stdio.h>
50
#include <stdlib.h>
51
#include <unistd.h>
52
#include <errno.h>
53
#include <string.h>
54
#include <net/if.h>
55
#include <sys/ioctl.h>
56
#include <arpa/inet.h>
57
#define MAX_BROADCAST_SIZE 1400
58
 
59
static struct timeval timeout = { 3, 0 };
60
 
61
/*
62
 * pmapper remote-call-service interface.
63
 * This routine is used to call the pmapper remote call service
64
 * which will look up a service program in the port maps, and then
65
 * remotely call that routine with the given parameters.  This allows
66
 * programs to do a lookup and call in one step.
67
*/
68
enum clnt_stat
69
pmap_rmtcall(addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
70
        struct sockaddr_in *addr;
71
        u_long prog, vers, proc;
72
        xdrproc_t xdrargs, xdrres;
73
        caddr_t argsp, resp;
74
        struct timeval tout;
75
        u_long *port_ptr;
76
{
77
        int socket = -1;
78
        register CLIENT *client;
79
        struct rmtcallargs a;
80
        struct rmtcallres r;
81
        enum clnt_stat stat;
82
 
83
        addr->sin_port = htons(PMAPPORT);
84
        client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &socket);
85
        if (client != (CLIENT *)NULL) {
86
                a.prog = prog;
87
                a.vers = vers;
88
                a.proc = proc;
89
                a.args_ptr = argsp;
90
                a.xdr_args = xdrargs;
91
                r.port_ptr = port_ptr;
92
                r.results_ptr = resp;
93
                r.xdr_results = xdrres;
94
                stat = CLNT_CALL(client, PMAPPROC_CALLIT, xdr_rmtcall_args, &a,
95
                    xdr_rmtcallres, &r, tout);
96
                CLNT_DESTROY(client);
97
        } else {
98
                stat = RPC_FAILED;
99
        }
100
        if (socket != -1)
101
                (void)_close(socket);
102
        addr->sin_port = 0;
103
        return (stat);
104
}
105
 
106
 
107
/*
108
 * XDR remote call arguments
109
 * written for XDR_ENCODE direction only
110
 */
111
bool_t
112
xdr_rmtcall_args(xdrs, cap)
113
        register XDR *xdrs;
114
        register struct rmtcallargs *cap;
115
{
116
        u_int lenposition, argposition, position;
117
 
118
        if (xdr_u_long(xdrs, &(cap->prog)) &&
119
            xdr_u_long(xdrs, &(cap->vers)) &&
120
            xdr_u_long(xdrs, &(cap->proc))) {
121
                lenposition = XDR_GETPOS(xdrs);
122
                if (! xdr_u_long(xdrs, &(cap->arglen)))
123
                    return (FALSE);
124
                argposition = XDR_GETPOS(xdrs);
125
                if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
126
                    return (FALSE);
127
                position = XDR_GETPOS(xdrs);
128
                cap->arglen = (u_long)position - (u_long)argposition;
129
                XDR_SETPOS(xdrs, lenposition);
130
                if (! xdr_u_long(xdrs, &(cap->arglen)))
131
                    return (FALSE);
132
                XDR_SETPOS(xdrs, position);
133
                return (TRUE);
134
        }
135
        return (FALSE);
136
}
137
 
138
/*
139
 * XDR remote call results
140
 * written for XDR_DECODE direction only
141
 */
142
bool_t
143
xdr_rmtcallres(xdrs, crp)
144
        register XDR *xdrs;
145
        register struct rmtcallres *crp;
146
{
147
        caddr_t port_ptr;
148
 
149
        port_ptr = (caddr_t)crp->port_ptr;
150
        if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
151
            xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
152
                crp->port_ptr = (u_long *)port_ptr;
153
                return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
154
        }
155
        return (FALSE);
156
}
157
 
158
 
159
/*
160
 * The following is kludged-up support for simple rpc broadcasts.
161
 * Someday a large, complicated system will replace these trivial
162
 * routines which only support udp/ip .
163
 */
164
 
165
static int
166
getbroadcastnets(addrs, sock, buf)
167
        struct in_addr *addrs;
168
        int sock;  /* any valid socket will do */
169
        char *buf;  /* why allocxate more when we can use existing... */
170
{
171
        struct ifconf ifc;
172
        struct ifreq ifreq, *ifr;
173
        struct sockaddr_in *sin;
174
        struct  in_addr addr;
175
        char *cp, *cplim;
176
        int n, i = 0;
177
 
178
        ifc.ifc_len = UDPMSGSIZE;
179
        ifc.ifc_buf = buf;
180
        if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
181
                perror("broadcast: ioctl (get interface configuration)");
182
                return (0);
183
        }
184
#define max(a, b) (a > b ? a : b)
185
#define size(p) max((p).sa_len, sizeof(p))
186
        cplim = buf + ifc.ifc_len; /*skip over if's with big ifr_addr's */
187
        for (cp = buf; cp < cplim;
188
                        cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
189
                ifr = (struct ifreq *)cp;
190
                if (ifr->ifr_addr.sa_family != AF_INET)
191
                        continue;
192
                ifreq = *ifr;
193
                if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
194
                        perror("broadcast: ioctl (get interface flags)");
195
                        continue;
196
                }
197
                if ((ifreq.ifr_flags & IFF_BROADCAST) &&
198
                    (ifreq.ifr_flags & IFF_UP)) {
199
                        sin = (struct sockaddr_in *)&ifr->ifr_addr;
200
#ifdef SIOCGIFBRDADDR   /* 4.3BSD */
201
                        if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
202
                                addr =
203
                                    inet_makeaddr(inet_netof(sin->sin_addr),
204
                                    INADDR_ANY);
205
                        } else {
206
                                addr = ((struct sockaddr_in*)
207
                                  &ifreq.ifr_addr)->sin_addr;
208
                        }
209
#else /* 4.2 BSD */
210
                        addr = inet_makeaddr(inet_netof(sin->sin_addr),
211
                            INADDR_ANY);
212
#endif
213
                        for (n=i-1; n>=0; n--) {
214
                                if (addr.s_addr == addrs[n].s_addr)
215
                                        break;
216
                        }
217
                        if (n<0) {
218
                                addrs[i++] = addr;
219
                        }
220
                }
221
        }
222
        return (i);
223
}
224
 
225
typedef bool_t (*resultproc_t)();
226
 
227
enum clnt_stat
228
clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
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 */
237
{
238
        enum clnt_stat stat;
239
        AUTH *unix_auth = authunix_create_default();
240
        XDR xdr_stream;
241
        register XDR *xdrs = &xdr_stream;
242
        int outlen, inlen, fromlen, nets;
243
        register int sock;
244
        int on = 1;
245
        fd_set *fds = 0, readfds; /* initialized to avoid warning */
246
        register int i;
247
        bool_t done = FALSE;
248
        register u_long xid;
249
        u_long port;
250
        struct in_addr addrs[20];
251
        struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
252
        struct rmtcallargs a;
253
        struct rmtcallres r;
254
        struct rpc_msg msg;
255
        struct timeval t, tv;
256
        char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
257
        static u_int32_t disrupt;
258
 
259
        if (disrupt == 0)
260
                disrupt = (u_int32_t)(long)resultsp;
261
 
262
        /*
263
         * initialization: create a socket, a broadcast address, and
264
         * preserialize the arguments into a send buffer.
265
         */
266
        if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
267
                perror("Cannot create socket for broadcast rpc");
268
                stat = RPC_CANTSEND;
269
                goto done_broad;
270
        }
271
#ifdef SO_BROADCAST
272
        if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
273
                perror("Cannot set socket option SO_BROADCAST");
274
                stat = RPC_CANTSEND;
275
                goto done_broad;
276
        }
277
#endif /* def SO_BROADCAST */
278
        if (sock + 1 > FD_SETSIZE) {
279
                int bytes = howmany(sock + 1, NFDBITS) * sizeof(fd_mask);
280
                fds = (fd_set *)malloc(bytes);
281
                if (fds == NULL) {
282
                        stat = RPC_CANTSEND;
283
                        goto done_broad;
284
                }
285
                memset(fds, 0, bytes);
286
        } else {
287
                fds = &readfds;
288
                FD_ZERO(fds);
289
        }
290
 
291
        nets = getbroadcastnets(addrs, sock, inbuf);
292
        memset(&baddr, 0, sizeof (baddr));
293
        baddr.sin_len = sizeof(struct sockaddr_in);
294
        baddr.sin_family = AF_INET;
295
        baddr.sin_port = htons(PMAPPORT);
296
        baddr.sin_addr.s_addr = htonl(INADDR_ANY);
297
        (void)gettimeofday(&t, (struct timezone *)0);
298
        msg.rm_xid = xid = (++disrupt) ^ getpid() ^ t.tv_sec ^ t.tv_usec;
299
        t.tv_usec = 0;
300
        msg.rm_direction = CALL;
301
        msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
302
        msg.rm_call.cb_prog = PMAPPROG;
303
        msg.rm_call.cb_vers = PMAPVERS;
304
        msg.rm_call.cb_proc = PMAPPROC_CALLIT;
305
        msg.rm_call.cb_cred = unix_auth->ah_cred;
306
        msg.rm_call.cb_verf = unix_auth->ah_verf;
307
        a.prog = prog;
308
        a.vers = vers;
309
        a.proc = proc;
310
        a.xdr_args = xargs;
311
        a.args_ptr = argsp;
312
        r.port_ptr = &port;
313
        r.xdr_results = xresults;
314
        r.results_ptr = resultsp;
315
        xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
316
        if ((! xdr_callmsg(xdrs, &msg)) || (! xdr_rmtcall_args(xdrs, &a))) {
317
                stat = RPC_CANTENCODEARGS;
318
                goto done_broad;
319
        }
320
        outlen = (int)xdr_getpos(xdrs);
321
        xdr_destroy(xdrs);
322
        /*
323
         * Basic loop: broadcast a packet and wait a while for response(s).
324
         * The response timeout grows larger per iteration.
325
         *
326
         * XXX This will loop about 5 times the stop. If there are
327
         * lots of signals being received by the process it will quit
328
         * send them all in one quick burst, not paying attention to
329
         * the intended function of sending them slowly over half a
330
         * minute or so
331
         */
332
        for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) {
333
                for (i = 0; i < nets; i++) {
334
                        baddr.sin_addr = addrs[i];
335
                        if (sendto(sock, outbuf, outlen, 0,
336
                                (struct sockaddr *)&baddr,
337
                                sizeof (struct sockaddr)) != outlen) {
338
                                perror("Cannot send broadcast packet");
339
                                stat = RPC_CANTSEND;
340
                                goto done_broad;
341
                        }
342
                }
343
                if (eachresult == NULL) {
344
                        stat = RPC_SUCCESS;
345
                        goto done_broad;
346
                }
347
        recv_again:
348
                msg.acpted_rply.ar_verf = _null_auth;
349
                msg.acpted_rply.ar_results.where = (caddr_t)&r;
350
                msg.acpted_rply.ar_results.proc = xdr_rmtcallres;
351
                /* XXX we know the other bits are still clear */
352
                FD_SET(sock, fds);
353
                tv = t;         /* for select() that copies back */
354
                switch (select(sock + 1, fds, NULL, NULL, &tv)) {
355
 
356
                case 0:  /* timed out */
357
                        stat = RPC_TIMEDOUT;
358
                        continue;
359
 
360
                case -1:  /* some kind of error */
361
                        if (errno == EINTR)
362
                                goto recv_again;
363
                        perror("Broadcast select problem");
364
                        stat = RPC_CANTRECV;
365
                        goto done_broad;
366
 
367
                }  /* end of select results switch */
368
        try_again:
369
                fromlen = sizeof(struct sockaddr);
370
                inlen = recvfrom(sock, inbuf, UDPMSGSIZE, 0,
371
                        (struct sockaddr *)&raddr, &fromlen);
372
                if (inlen < 0) {
373
                        if (errno == EINTR)
374
                                goto try_again;
375
                        perror("Cannot receive reply to broadcast");
376
                        stat = RPC_CANTRECV;
377
                        goto done_broad;
378
                }
379
                if (inlen < sizeof(u_int32_t))
380
                        goto recv_again;
381
                /*
382
                 * see if reply transaction id matches sent id.
383
                 * If so, decode the results.
384
                 */
385
                xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
386
                if (xdr_replymsg(xdrs, &msg)) {
387
                        if ((msg.rm_xid == xid) &&
388
                                (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
389
                                (msg.acpted_rply.ar_stat == SUCCESS)) {
390
                                raddr.sin_port = htons((u_short)port);
391
                                done = (*eachresult)(resultsp, &raddr);
392
                        }
393
                        /* otherwise, we just ignore the errors ... */
394
                }
395
                xdrs->x_op = XDR_FREE;
396
                msg.acpted_rply.ar_results.proc = xdr_void;
397
                (void)xdr_replymsg(xdrs, &msg);
398
                (void)(*xresults)(xdrs, resultsp);
399
                xdr_destroy(xdrs);
400
                if (done) {
401
                        stat = RPC_SUCCESS;
402
                        goto done_broad;
403
                } else {
404
                        goto recv_again;
405
                }
406
        }
407
done_broad:
408
        if (fds != &readfds)
409
                free(fds);
410
        if (sock >= 0)
411
                (void)_close(sock);
412
        AUTH_DESTROY(unix_auth);
413
        return (stat);
414
}
415
 

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