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[FreeBSD/releng/10.2.git] / contrib / netbsd-tests / fs / nfs / nfsservice / rpcbind / rpcb_svc_4.c
1 /*      $NetBSD: rpcb_svc_4.c,v 1.2 2011/09/16 16:13:18 plunky Exp $    */
2
3 /*
4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5  * unrestricted use provided that this legend is included on all tape
6  * media and as a part of the software program in whole or part.  Users
7  * may copy or modify Sun RPC without charge, but are not authorized
8  * to license or distribute it to anyone else except as part of a product or
9  * program developed by the user.
10  * 
11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14  * 
15  * Sun RPC is provided with no support and without any obligation on the
16  * part of Sun Microsystems, Inc. to assist in its use, correction,
17  * modification or enhancement.
18  * 
19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21  * OR ANY PART THEREOF.
22  * 
23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24  * or profits or other special, indirect and consequential damages, even if
25  * Sun has been advised of the possibility of such damages.
26  * 
27  * Sun Microsystems, Inc.
28  * 2550 Garcia Avenue
29  * Mountain View, California  94043
30  */
31 /*
32  * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
33  */
34
35 /* #ident       "@(#)rpcb_svc_4.c       1.8     93/07/05 SMI" */
36
37 /*
38  * rpcb_svc_4.c
39  * The server procedure for the version 4 rpcbind.
40  *
41  */
42
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #include <rpc/rpc.h>
46 #include <stdio.h>
47 #include <unistd.h>
48 #include <netconfig.h>
49 #include <syslog.h>
50 #include <string.h>
51 #include <stdlib.h>
52 #include "rpcbind.h"
53
54 static void *rpcbproc_getaddr_4_local(void *, struct svc_req *, SVCXPRT *,
55     rpcvers_t);
56 static void *rpcbproc_getversaddr_4_local(void *, struct svc_req *, SVCXPRT *,
57     rpcvers_t);
58 static void *rpcbproc_getaddrlist_4_local(void *, struct svc_req *, SVCXPRT *,
59     rpcvers_t);
60 static void free_rpcb_entry_list(rpcb_entry_list_ptr *);
61 static void *rpcbproc_dump_4_local(void *, struct svc_req *, SVCXPRT *,
62     rpcvers_t);
63
64 /*
65  * Called by svc_getreqset. There is a separate server handle for
66  * every transport that it waits on.
67  */
68 void
69 rpcb_service_4(struct svc_req *rqstp, SVCXPRT *transp)
70 {
71         union {
72                 rpcb rpcbproc_set_4_arg;
73                 rpcb rpcbproc_unset_4_arg;
74                 rpcb rpcbproc_getaddr_4_local_arg;
75                 char *rpcbproc_uaddr2taddr_4_arg;
76                 struct netbuf rpcbproc_taddr2uaddr_4_arg;
77         } argument;
78         char *result;
79         xdrproc_t xdr_argument, xdr_result;
80         void *(*local)(void *, struct svc_req *, SVCXPRT *, rpcvers_t);
81
82         rpcbs_procinfo(RPCBVERS_4_STAT, rqstp->rq_proc);
83
84         switch (rqstp->rq_proc) {
85         case NULLPROC:
86                 /*
87                  * Null proc call
88                  */
89 #ifdef RPCBIND_DEBUG
90                 if (debugging)
91                         fprintf(stderr, "RPCBPROC_NULL\n");
92 #endif
93                 check_access(transp, rqstp->rq_proc, NULL, RPCBVERS4);
94                 (void) svc_sendreply(transp, (xdrproc_t) xdr_void, NULL);
95                 return;
96
97         case RPCBPROC_SET:
98                 /*
99                  * Check to see whether the message came from
100                  * loopback transports (for security reasons)
101                  */
102                 xdr_argument = (xdrproc_t)xdr_rpcb;
103                 xdr_result = (xdrproc_t)xdr_bool;
104                 local = rpcbproc_set_com;
105                 break;
106
107         case RPCBPROC_UNSET:
108                 /*
109                  * Check to see whether the message came from
110                  * loopback transports (for security reasons)
111                  */
112                 xdr_argument = (xdrproc_t)xdr_rpcb;
113                 xdr_result = (xdrproc_t)xdr_bool;
114                 local = rpcbproc_unset_com;
115                 break;
116
117         case RPCBPROC_GETADDR:
118                 xdr_argument = (xdrproc_t)xdr_rpcb;
119                 xdr_result = (xdrproc_t)xdr_wrapstring;
120                 local = rpcbproc_getaddr_4_local;
121                 break;
122
123         case RPCBPROC_GETVERSADDR:
124 #ifdef RPCBIND_DEBUG
125                 if (debugging)
126                         fprintf(stderr, "RPCBPROC_GETVERSADDR\n");
127 #endif
128                 xdr_argument = (xdrproc_t)xdr_rpcb;
129                 xdr_result = (xdrproc_t)xdr_wrapstring;
130                 local = rpcbproc_getversaddr_4_local;
131                 break;
132
133         case RPCBPROC_DUMP:
134 #ifdef RPCBIND_DEBUG
135                 if (debugging)
136                         fprintf(stderr, "RPCBPROC_DUMP\n");
137 #endif
138                 xdr_argument = (xdrproc_t)xdr_void;
139                 xdr_result = (xdrproc_t)xdr_rpcblist_ptr;
140                 local = rpcbproc_dump_4_local;
141                 break;
142
143         case RPCBPROC_INDIRECT:
144 #ifdef RPCBIND_DEBUG
145                 if (debugging)
146                         fprintf(stderr, "RPCBPROC_INDIRECT\n");
147 #endif
148                 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4);
149                 return;
150
151 /*      case RPCBPROC_CALLIT: */
152         case RPCBPROC_BCAST:
153 #ifdef RPCBIND_DEBUG
154                 if (debugging)
155                         fprintf(stderr, "RPCBPROC_BCAST\n");
156 #endif
157                 rpcbproc_callit_com(rqstp, transp, rqstp->rq_proc, RPCBVERS4);
158                 return;
159
160         case RPCBPROC_GETTIME:
161 #ifdef RPCBIND_DEBUG
162                 if (debugging)
163                         fprintf(stderr, "RPCBPROC_GETTIME\n");
164 #endif
165                 xdr_argument = (xdrproc_t)xdr_void;
166                 xdr_result = (xdrproc_t)xdr_u_long;
167                 local = rpcbproc_gettime_com;
168                 break;
169
170         case RPCBPROC_UADDR2TADDR:
171 #ifdef RPCBIND_DEBUG
172                 if (debugging)
173                         fprintf(stderr, "RPCBPROC_UADDR2TADDR\n");
174 #endif
175                 xdr_argument = (xdrproc_t)xdr_wrapstring;
176                 xdr_result = (xdrproc_t)xdr_netbuf;
177                 local = rpcbproc_uaddr2taddr_com;
178                 break;
179
180         case RPCBPROC_TADDR2UADDR:
181 #ifdef RPCBIND_DEBUG
182                 if (debugging)
183                         fprintf(stderr, "RPCBPROC_TADDR2UADDR\n");
184 #endif
185                 xdr_argument = (xdrproc_t)xdr_netbuf;
186                 xdr_result = (xdrproc_t)xdr_wrapstring;
187                 local = rpcbproc_taddr2uaddr_com;
188                 break;
189
190         case RPCBPROC_GETADDRLIST:
191 #ifdef RPCBIND_DEBUG
192                 if (debugging)
193                         fprintf(stderr, "RPCBPROC_GETADDRLIST\n");
194 #endif
195                 xdr_argument = (xdrproc_t)xdr_rpcb;
196                 xdr_result = (xdrproc_t)xdr_rpcb_entry_list_ptr;
197                 local = rpcbproc_getaddrlist_4_local;
198                 break;
199
200         case RPCBPROC_GETSTAT:
201 #ifdef RPCBIND_DEBUG
202                 if (debugging)
203                         fprintf(stderr, "RPCBPROC_GETSTAT\n");
204 #endif
205                 xdr_argument = (xdrproc_t)xdr_void;
206                 xdr_result = (xdrproc_t)xdr_rpcb_stat_byvers;
207                 local = rpcbproc_getstat;
208                 break;
209
210         default:
211                 svcerr_noproc(transp);
212                 return;
213         }
214         memset((char *)&argument, 0, sizeof (argument));
215         if (!svc_getargs(transp, (xdrproc_t) xdr_argument,
216                 (char *)&argument)) {
217                 svcerr_decode(transp);
218                 if (debugging)
219                         (void) fprintf(stderr, "rpcbind: could not decode\n");
220                 return;
221         }
222         if (!check_access(transp, rqstp->rq_proc, &argument, RPCBVERS4)) {
223                 svcerr_weakauth(transp);
224                 goto done;
225         }
226         result = (*local)(&argument, rqstp, transp, RPCBVERS4);
227         if (result != NULL && !svc_sendreply(transp, (xdrproc_t) xdr_result,
228                                                 result)) {
229                 svcerr_systemerr(transp);
230                 if (debugging) {
231                         (void) fprintf(stderr, "rpcbind: svc_sendreply\n");
232                         if (doabort) {
233                                 rpcbind_abort();
234                         }
235                 }
236         }
237 done:
238         if (!svc_freeargs(transp, (xdrproc_t) xdr_argument,
239                                 (char *)&argument)) {
240                 if (debugging) {
241                         (void) fprintf(stderr, "unable to free arguments\n");
242                         if (doabort) {
243                                 rpcbind_abort();
244                         }
245                 }
246         }
247         return;
248 }
249
250 /*
251  * Lookup the mapping for a program, version and return its
252  * address. Assuming that the caller wants the address of the
253  * server running on the transport on which the request came.
254  * Even if a service with a different version number is available,
255  * it will return that address.  The client should check with an
256  * clnt_call to verify whether the service is the one that is desired.
257  * We also try to resolve the universal address in terms of
258  * address of the caller.
259  */
260 /* ARGSUSED */
261 static void *
262 rpcbproc_getaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
263                          rpcvers_t rpcbversnum)
264 {
265         RPCB *regp = (RPCB *)arg;
266 #ifdef RPCBIND_DEBUG
267         if (debugging) {
268                 char *uaddr;
269
270                 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
271                             svc_getrpccaller(transp));
272                 fprintf(stderr, "RPCB_GETADDR req for (%lu, %lu, %s) from %s: ",
273                     (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
274                     regp->r_netid, uaddr);
275                 free(uaddr);
276         }
277 #endif
278         return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4,
279                                         RPCB_ALLVERS));
280 }
281
282 /*
283  * Lookup the mapping for a program, version and return its
284  * address. Assuming that the caller wants the address of the
285  * server running on the transport on which the request came.
286  *
287  * We also try to resolve the universal address in terms of
288  * address of the caller.
289  */
290 /* ARGSUSED */
291 static void *
292 rpcbproc_getversaddr_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
293                              rpcvers_t versnum)
294 {
295         RPCB *regp = (RPCB *)arg;
296 #ifdef RPCBIND_DEBUG
297         if (debugging) {
298                 char *uaddr;
299
300                 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid),
301                             svc_getrpccaller(transp));
302                 fprintf(stderr, "RPCB_GETVERSADDR rqst for (%lu, %lu, %s)"
303                                 " from %s : ",
304                     (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
305                     regp->r_netid, uaddr);
306                 free(uaddr);
307         }
308 #endif
309         return (rpcbproc_getaddr_com(regp, rqstp, transp, RPCBVERS4,
310                                         RPCB_ONEVERS));
311 }
312
313 /*
314  * Lookup the mapping for a program, version and return the
315  * addresses for all transports in the current transport family.
316  * We return a merged address.
317  */
318 /* ARGSUSED */
319 static void *
320 rpcbproc_getaddrlist_4_local(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
321                              rpcvers_t versnum)
322 {
323         RPCB *regp = (RPCB *)arg;
324         static rpcb_entry_list_ptr rlist;
325         register rpcblist_ptr rbl;
326         rpcb_entry_list_ptr rp, tail = NULL;
327         rpcprog_t prog;
328         rpcvers_t vers;
329         rpcb_entry *a;
330         struct netconfig *nconf;
331         struct netconfig *reg_nconf;
332         char *saddr, *maddr = NULL;
333
334         free_rpcb_entry_list(&rlist);
335         prog = regp->r_prog;
336         vers = regp->r_vers;
337         reg_nconf = rpcbind_get_conf(transp->xp_netid);
338         if (reg_nconf == NULL)
339                 return (NULL);
340         if (*(regp->r_addr) != '\0') {
341                 saddr = regp->r_addr;
342         } else {
343                 saddr = NULL;
344         }
345 #ifdef RPCBIND_DEBUG
346         if (debugging) {
347                 fprintf(stderr, "r_addr: %s r_netid: %s nc_protofmly: %s\n",
348                     regp->r_addr, regp->r_netid, reg_nconf->nc_protofmly);
349         }
350 #endif
351         for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
352             if ((rbl->rpcb_map.r_prog == prog) &&
353                 (rbl->rpcb_map.r_vers == vers)) {
354                 nconf = rpcbind_get_conf(rbl->rpcb_map.r_netid);
355                 if (nconf == NULL)
356                         goto fail;
357                 if (strcmp(nconf->nc_protofmly, reg_nconf->nc_protofmly)
358                                 != 0) {
359                         continue;       /* not same proto family */
360                 }
361 #ifdef RPCBIND_DEBUG
362                 if (debugging)
363                         fprintf(stderr, "\tmerge with: %s\n", rbl->rpcb_map.r_addr);
364 #endif
365                 if ((maddr = mergeaddr(transp, rbl->rpcb_map.r_netid,
366                                 rbl->rpcb_map.r_addr, saddr)) == NULL) {
367 #ifdef RPCBIND_DEBUG
368                 if (debugging)
369                         fprintf(stderr, " FAILED\n");
370 #endif
371                         continue;
372                 } else if (!maddr[0]) {
373 #ifdef RPCBIND_DEBUG
374         if (debugging)
375                 fprintf(stderr, " SUCCEEDED, but port died -  maddr: nullstring\n");
376 #endif
377                         /* The server died. Unset this combination */
378                         delete_prog(regp->r_prog);
379                         free(maddr);
380                         continue;
381                 }
382 #ifdef RPCBIND_DEBUG
383                 if (debugging)
384                         fprintf(stderr, " SUCCEEDED maddr: %s\n", maddr);
385 #endif
386                 /*
387                  * Add it to rlist.
388                  */
389                 rp = (rpcb_entry_list_ptr)
390                         malloc((u_int)sizeof (rpcb_entry_list));
391                 if (rp == NULL) {
392                         free(maddr);
393                         goto fail;
394                 }
395                 a = &rp->rpcb_entry_map;
396                 a->r_maddr = maddr;
397                 a->r_nc_netid = nconf->nc_netid;
398                 a->r_nc_semantics = nconf->nc_semantics;
399                 a->r_nc_protofmly = nconf->nc_protofmly;
400                 a->r_nc_proto = nconf->nc_proto;
401                 rp->rpcb_entry_next = NULL;
402                 if (rlist == NULL) {
403                         rlist = rp;
404                         tail = rp;
405                 } else if (tail) {
406                         tail->rpcb_entry_next = rp;
407                         tail = rp;
408                 }
409                 rp = NULL;
410             }
411         }
412 #ifdef RPCBIND_DEBUG
413         if (debugging) {
414                 for (rp = rlist; rp; rp = rp->rpcb_entry_next) {
415                         fprintf(stderr, "\t%s %s\n", rp->rpcb_entry_map.r_maddr,
416                                 rp->rpcb_entry_map.r_nc_proto);
417                 }
418         }
419 #endif
420         /*
421          * XXX: getaddrlist info is also being stuffed into getaddr.
422          * Perhaps wrong, but better than it not getting counted at all.
423          */
424         rpcbs_getaddr(RPCBVERS4 - 2, prog, vers, transp->xp_netid, maddr);
425         return (void *)&rlist;
426
427 fail:   free_rpcb_entry_list(&rlist);
428         return (NULL);
429 }
430
431 /*
432  * Free only the allocated structure, rest is all a pointer to some
433  * other data somewhere else.
434  */
435 static void
436 free_rpcb_entry_list(rpcb_entry_list_ptr *rlistp)
437 {
438         register rpcb_entry_list_ptr rbl, tmp;
439
440         for (rbl = *rlistp; rbl != NULL; ) {
441                 tmp = rbl;
442                 rbl = rbl->rpcb_entry_next;
443                 free((char *)tmp->rpcb_entry_map.r_maddr);
444                 free((char *)tmp);
445         }
446         *rlistp = NULL;
447 }
448
449 /* ARGSUSED */
450 static void *
451 rpcbproc_dump_4_local(void *arg, struct svc_req *req, SVCXPRT *xprt,
452                       rpcvers_t versnum)
453 {
454         return ((void *)&list_rbl);
455 }