1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27 /*
28 * Helper routines for nfsmapid and autod daemon
29 * to translate hostname to IP address and Netinfo.
30 */
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <alloca.h>
34 #include <signal.h>
35 #include <libintl.h>
36 #include <limits.h>
37 #include <errno.h>
38 #include <sys/types.h>
39 #include <string.h>
40 #include <memory.h>
41 #include <pwd.h>
42 #include <grp.h>
43 #include <door.h>
44 #include <syslog.h>
45 #include <fcntl.h>
46 #include <unistd.h>
47 #include <assert.h>
48 #include <deflt.h>
49 #include <netdir.h>
50 #include <nfs/nfs4.h>
51 #include <nfs/nfssys.h>
52 #include <nfs/nfsid_map.h>
53 #include <nfs/mapid.h>
54 #include <nfs/nfs_sec.h>
55 #include <sys/sdt.h>
56 #include <sys/idmap.h>
57 #include <idmap.h>
58 #include <sys/fs/autofs.h>
59 #include "nfs_resolve.h"
60
61 void
free_knconf(struct knetconfig * k)62 free_knconf(struct knetconfig *k)
63 {
64 if (k == NULL)
65 return;
66 if (k->knc_protofmly)
67 free(k->knc_protofmly);
68 if (k->knc_proto)
69 free(k->knc_proto);
70 free(k);
71 }
72
73 struct knetconfig *
get_knconf(struct netconfig * nconf)74 get_knconf(struct netconfig *nconf)
75 {
76 struct stat stbuf;
77 struct knetconfig *k = NULL;
78 int len;
79
80 if (stat(nconf->nc_device, &stbuf) < 0) {
81 syslog(LOG_ERR, "get_knconf: stat %s: %m", nconf->nc_device);
82 return (NULL);
83 }
84 k = (struct knetconfig *)malloc(sizeof (*k));
85 if (k == NULL)
86 goto nomem;
87 k->knc_semantics = nconf->nc_semantics;
88
89 len = strlen(nconf->nc_protofmly);
90 if (len <= 0)
91 goto err_out;
92 k->knc_protofmly = malloc(KNC_STRSIZE);
93 if (k->knc_protofmly == NULL)
94 goto nomem;
95 bzero(k->knc_protofmly, KNC_STRSIZE);
96 bcopy(nconf->nc_protofmly, k->knc_protofmly, len);
97
98 len = strlen(nconf->nc_proto);
99 if (len <= 0)
100 goto err_out;
101 k->knc_proto = malloc(KNC_STRSIZE);
102 if (k->knc_proto == NULL)
103 goto nomem;
104 bzero(k->knc_proto, KNC_STRSIZE);
105 bcopy(nconf->nc_proto, k->knc_proto, len);
106
107 k->knc_rdev = stbuf.st_rdev;
108
109 return (k);
110
111 nomem:
112 syslog(LOG_ERR, "get_knconf: no memory");
113 err_out:
114 if (k != NULL)
115 (void) free_knconf(k);
116 return (NULL);
117 }
118
119 /*
120 * Get the information needed for an NFSv4.x referral. This
121 * information includes the netbuf, netname and knconfig.
122 */
123 struct nfs_fsl_info *
get_nfs4ref_info(char * host,int port,int nfsver)124 get_nfs4ref_info(char *host, int port, int nfsver)
125 {
126 char netname[MAXNETNAMELEN + 1];
127 enum clnt_stat cstat;
128 struct nfs_fsl_info *fsl_retp = NULL;
129 struct netconfig *netconf = NULL;
130 char *nametemp, *namex = NULL;
131 struct netbuf *nb = NULL;
132 NCONF_HANDLE *nc = NULL;
133
134 fsl_retp = calloc(1, sizeof (struct nfs_fsl_info));
135 if (fsl_retp == NULL) {
136 syslog(LOG_ERR, "get_nfs4ref_info: no memory\n");
137 return (NULL);
138 }
139
140 nametemp = malloc(MAXNETNAMELEN + 1);
141 if (nametemp == NULL) {
142 free(fsl_retp);
143 return (NULL);
144 }
145 host2netname(nametemp, host, NULL);
146 namex = calloc(1, strlen(nametemp) + 1);
147 if (namex == NULL) {
148 free(nametemp);
149 free(fsl_retp);
150 return (NULL);
151 }
152 strncpy(namex, nametemp, strlen(nametemp));
153 free(nametemp);
154 fsl_retp->netname = namex;
155 fsl_retp->netnm_len = strlen(namex) + 1;
156
157 fsl_retp->addr = resolve_netconf(host, NFS_PROGRAM, nfsver,
158 &netconf, port, NULL, NULL, TRUE, NULL, &cstat);
159
160 if (netconf == NULL || fsl_retp->addr == NULL)
161 goto done;
162
163 fsl_retp->knconf = get_knconf(netconf);
164 if (fsl_retp->knconf == NULL)
165 goto done;
166 fsl_retp->knconf_len = (sizeof (struct knetconfig) +
167 (KNC_STRSIZE * 2));
168 fsl_retp->netbuf_len = (sizeof (struct netbuf) +
169 fsl_retp->addr->maxlen);
170 return (fsl_retp);
171 done:
172 free_nfs4ref_info(fsl_retp);
173 return (NULL);
174 }
175
176 void
free_nfs4ref_info(struct nfs_fsl_info * fsl_retp)177 free_nfs4ref_info(struct nfs_fsl_info *fsl_retp)
178 {
179 if (fsl_retp == NULL)
180 return;
181 free_knconf(fsl_retp->knconf);
182 free(fsl_retp->netname);
183 if (fsl_retp->addr != NULL) {
184 free(fsl_retp->addr->buf);
185 free(fsl_retp->addr);
186 }
187 free(fsl_retp);
188 }
189
190 void
cleanup_tli_parms(struct t_bind * tbind,int fd)191 cleanup_tli_parms(struct t_bind *tbind, int fd)
192 {
193 if (tbind != NULL) {
194 t_free((char *)tbind, T_BIND);
195 tbind = NULL;
196 }
197 if (fd >= 0)
198 (void) t_close(fd);
199 fd = -1;
200 }
201
202 struct netbuf *
resolve_netconf(char * host,rpcprog_t prog,rpcvers_t nfsver,struct netconfig ** netconf,ushort_t port,struct t_info * tinfo,caddr_t * fhp,bool_t direct_to_server,char * fspath,enum clnt_stat * cstatp)203 resolve_netconf(char *host, rpcprog_t prog, rpcvers_t nfsver,
204 struct netconfig **netconf, ushort_t port,
205 struct t_info *tinfo, caddr_t *fhp, bool_t direct_to_server,
206 char *fspath, enum clnt_stat *cstatp)
207 {
208 NCONF_HANDLE *nc;
209 struct netconfig *nconf = NULL;
210 int nthtry = FIRST_TRY;
211 struct netbuf *nb;
212 enum clnt_stat cstat;
213
214 nc = setnetpath();
215 if (nc == NULL)
216 goto done;
217 retry:
218 while (nconf = getnetpath(nc)) {
219 if (nconf->nc_flag & NC_VISIBLE) {
220 if (nthtry == FIRST_TRY) {
221 if ((nconf->nc_semantics ==
222 NC_TPI_COTS_ORD) ||
223 (nconf->nc_semantics ==
224 NC_TPI_COTS)) {
225 if (port == 0)
226 break;
227 if ((strcmp(nconf->nc_protofmly,
228 NC_INET) == 0 ||
229 strcmp(nconf->nc_protofmly,
230 NC_INET6) == 0) &&
231 (strcmp(nconf->nc_proto,
232 NC_TCP) == 0))
233 break;
234 }
235 }
236 if (nthtry == SECOND_TRY) {
237 if (nconf->nc_semantics ==
238 NC_TPI_CLTS) {
239 if (port == 0)
240 break;
241 if ((strcmp(nconf->nc_protofmly,
242 NC_INET) == 0 ||
243 strcmp(nconf->nc_protofmly,
244 NC_INET6) == 0) &&
245 (strcmp(nconf->nc_proto,
246 NC_UDP) == 0))
247 break;
248 }
249 }
250 }
251 } /* while */
252 if (nconf == NULL) {
253 if (++nthtry <= MNT_PREF_LISTLEN) {
254 endnetpath(nc);
255 if ((nc = setnetpath()) == NULL)
256 goto done;
257 goto retry;
258 } else
259 return (NULL);
260 } else {
261 nb = get_server_addr(host, NFS_PROGRAM, nfsver,
262 nconf, port, NULL, NULL, TRUE, NULL, &cstat);
263 if (cstat != RPC_SUCCESS)
264 goto retry;
265 }
266 done:
267 *netconf = nconf;
268 *cstatp = cstat;
269 if (nc)
270 endnetpath(nc);
271 return (nb);
272 }
273
274 int
setup_nb_parms(struct netconfig * nconf,struct t_bind * tbind,struct t_info * tinfo,char * hostname,int fd,bool_t direct_to_server,ushort_t port,rpcprog_t prog,rpcvers_t vers,bool_t file_handle)275 setup_nb_parms(struct netconfig *nconf, struct t_bind *tbind,
276 struct t_info *tinfo, char *hostname, int fd, bool_t direct_to_server,
277 ushort_t port, rpcprog_t prog, rpcvers_t vers, bool_t file_handle)
278 {
279 if (nconf == NULL) {
280 return (-1);
281 }
282 if (direct_to_server == TRUE) {
283 struct nd_hostserv hs;
284 struct nd_addrlist *retaddrs;
285 hs.h_host = hostname;
286
287 if (port == 0)
288 hs.h_serv = "nfs";
289 else
290 hs.h_serv = NULL;
291
292 if (netdir_getbyname(nconf, &hs, &retaddrs) != ND_OK) {
293 return (-1);
294 }
295 memcpy(tbind->addr.buf, retaddrs->n_addrs->buf,
296 retaddrs->n_addrs->len);
297 tbind->addr.len = retaddrs->n_addrs->len;
298 tbind->addr.maxlen = retaddrs->n_addrs->maxlen;
299 netdir_free((void *)retaddrs, ND_ADDRLIST);
300 if (port) {
301 /* LINTED pointer alignment */
302 if (strcmp(nconf->nc_protofmly, NC_INET) == NULL)
303 ((struct sockaddr_in *)
304 tbind->addr.buf)->sin_port =
305 htons((ushort_t)port);
306 else if (strcmp(nconf->nc_protofmly, NC_INET6) == NULL)
307 ((struct sockaddr_in6 *)
308 tbind->addr.buf)->sin6_port =
309 htons((ushort_t)port);
310 }
311
312 if (file_handle) {
313 if (netdir_options(nconf, ND_SET_RESERVEDPORT, fd,
314 NULL) == -1)
315 return (-1);
316 }
317 } else if (!file_handle) {
318 if (port) {
319 /* LINTED pointer alignment */
320 if (strcmp(nconf->nc_protofmly, NC_INET) == NULL)
321 ((struct sockaddr_in *)
322 tbind->addr.buf)->sin_port =
323 htons((ushort_t)port);
324 else if (strcmp(nconf->nc_protofmly, NC_INET6) == NULL)
325 ((struct sockaddr_in6 *)
326 tbind->addr.buf)->sin6_port =
327 htons((ushort_t)port);
328 }
329 } else {
330 return (-1);
331 }
332 return (1);
333 }
334
335 /*
336 * Sets up TLI interface and finds the address withe netdir_getbyname().
337 * returns the address returned from the call.
338 * Caller frees up the memory allocated here.
339 */
340 struct netbuf *
get_server_addr(char * hostname,rpcprog_t prog,rpcvers_t vers,struct netconfig * nconf,ushort_t port,struct t_info * tinfo,caddr_t * fhp,bool_t direct_to_server,char * fspath,enum clnt_stat * cstat)341 get_server_addr(char *hostname, rpcprog_t prog, rpcvers_t vers,
342 struct netconfig *nconf, ushort_t port,
343 struct t_info *tinfo, caddr_t *fhp, bool_t direct_to_server,
344 char *fspath, enum clnt_stat *cstat)
345 {
346 int fd = -1;
347 struct t_bind *tbind = NULL;
348 enum clnt_stat cs = RPC_SYSTEMERROR;
349 struct netbuf *nb = NULL;
350 int ret = -1;
351
352 if (prog == NFS_PROGRAM && vers == NFS_V4)
353 if (strncasecmp(nconf->nc_proto, NC_UDP, strlen(NC_UDP)) == 0)
354 goto done;
355
356 if ((fd = t_open(nconf->nc_device, O_RDWR, tinfo)) < 0)
357 goto done;
358
359 if ((tbind = (struct t_bind *)t_alloc(fd, T_BIND, T_ADDR)) == NULL)
360 goto done;
361
362 if (setup_nb_parms(nconf, tbind, tinfo, hostname, fd, direct_to_server,
363 port, prog, vers, 0) < 0)
364 goto done;
365
366 nb = (struct netbuf *)malloc(sizeof (struct netbuf));
367 if (nb == NULL) {
368 syslog(LOG_ERR, "no memory\n");
369 goto done;
370 }
371 nb->buf = (char *)malloc(tbind->addr.maxlen);
372 if (nb->buf == NULL) {
373 syslog(LOG_ERR, "no memory\n");
374 free(nb);
375 nb = NULL;
376 goto done;
377 }
378 (void) memcpy(nb->buf, tbind->addr.buf, tbind->addr.len);
379 nb->len = tbind->addr.len;
380 nb->maxlen = tbind->addr.maxlen;
381 cs = RPC_SUCCESS;
382 done:
383 *cstat = cs;
384 cleanup_tli_parms(tbind, fd);
385 return (nb);
386 }
387