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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
22 * Use is subject to license terms.
23 */
24
25 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
26 /* All Rights Reserved */
27
28 /*
29 * Portions of this source code were derived from Berkeley
30 * under license from the Regents of the University of
31 * California.
32 */
33
34 #include <sys/types.h>
35 #include <sys/file.h>
36 #include <stdlib.h>
37 #include <ctype.h>
38 #include <string.h>
39 #include <tiuser.h>
40 #include <netinet/in.h>
41 #include <arpa/inet.h>
42 #include <sys/socket.h>
43 #include <netdir.h>
44 #include <netdb.h>
45 #include <rpc/rpc.h>
46 #include <rpc/pmap_clnt.h>
47 #include <rpcsvc/nis.h>
48
49 CLIENT *__clnt_tp_create_bootstrap();
50 int __rpcb_getaddr_bootstrap();
51 struct hostent *__files_gethostbyname(char *, sa_family_t);
52
53 extern int hostNotKnownLocally;
54
55 static char *__map_addr();
56 static struct hostent host;
57 static char hostaddr[sizeof (struct in6_addr)];
58 static char *host_aliases[MAXALIASES];
59 static char *host_addrs[] = {
60 hostaddr,
61 NULL
62 };
63
64 /*
65 * __clnt_tp_create_bootstrap()
66 *
67 * This routine is NOT TRANSPORT INDEPENDENT.
68 *
69 * It relies on the local /etc/hosts file for hostname to address
70 * translation and does it itself instead of calling netdir_getbyname
71 * thereby avoids recursion. Secondarily, it will use a validated
72 * IP address directly.
73 */
74 CLIENT *
__clnt_tp_create_bootstrap(hostname,prog,vers,nconf)75 __clnt_tp_create_bootstrap(hostname, prog, vers, nconf)
76 char *hostname;
77 ulong_t prog, vers;
78 struct netconfig *nconf;
79 {
80 CLIENT *cl;
81 struct netbuf *svc_taddr;
82 struct sockaddr_in6 *sa;
83 int fd;
84
85 if (nconf == (struct netconfig *)NULL) {
86 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
87 return (NULL);
88 }
89 if ((fd = t_open(nconf->nc_device, O_RDWR, NULL)) == -1) {
90 rpc_createerr.cf_stat = RPC_TLIERROR;
91 return (NULL);
92 }
93 svc_taddr = (struct netbuf *)malloc(sizeof (struct netbuf));
94 if (! svc_taddr) {
95 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
96 t_close(fd);
97 return (NULL);
98 }
99 sa = (struct sockaddr_in6 *)calloc(1, sizeof (*sa));
100 if (! sa) {
101 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
102 t_close(fd);
103 free(svc_taddr);
104 return (NULL);
105 }
106 svc_taddr->maxlen = svc_taddr->len = sizeof (*sa);
107 svc_taddr->buf = (char *)sa;
108 if (__rpcb_getaddr_bootstrap(prog,
109 vers, nconf, svc_taddr, hostname) == FALSE) {
110 t_close(fd);
111 free(svc_taddr);
112 free(sa);
113 return (NULL);
114 }
115 rpc_createerr.cf_stat = RPC_SUCCESS;
116 cl = __nis_clnt_create(fd, nconf, 0, svc_taddr, 0, prog, vers, 0, 0);
117 if (cl == 0) {
118 if (rpc_createerr.cf_stat == RPC_SUCCESS)
119 rpc_createerr.cf_stat = RPC_TLIERROR;
120 t_close(fd);
121 }
122 free(svc_taddr);
123 free(sa);
124 return (cl);
125 }
126
127 /*
128 * __rpcb_getaddr_bootstrap()
129 *
130 * This is our internal function that replaces rpcb_getaddr(). We
131 * build our own to prevent calling netdir_getbyname() which could
132 * recurse to the nameservice.
133 */
134 int
__rpcb_getaddr_bootstrap(program,version,nconf,address,hostname)135 __rpcb_getaddr_bootstrap(program, version, nconf, address, hostname)
136 ulong_t program;
137 ulong_t version;
138 struct netconfig *nconf;
139 struct netbuf *address; /* populate with the taddr of the service */
140 char *hostname;
141 {
142 char *svc_uaddr;
143 struct hostent *hent, tmphent;
144 struct sockaddr_in *sa;
145 struct sockaddr_in6 *sa6;
146 struct netbuf rpcb_taddr;
147 struct sockaddr_in local_sa;
148 struct sockaddr_in6 local_sa6;
149 in_port_t inport;
150 int p1, p2;
151 char *ipaddr, *port;
152 int i, ipaddrlen;
153 sa_family_t type;
154 char addr[sizeof (in6_addr_t)];
155 char *tmphost_addrs[2];
156
157 if (strcmp(nconf->nc_protofmly, NC_INET6) == 0) {
158 type = AF_INET6;
159 } else if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
160 type = AF_INET;
161 } else {
162 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
163 return (FALSE);
164 }
165
166 /* Get the address of the RPCBIND at hostname */
167 hent = __files_gethostbyname(hostname, type);
168 if (hent == (struct hostent *)NULL) {
169 /* Make sure this is not an IP address before giving up */
170 if (inet_pton(type, hostname, addr) == 1) {
171 /* This is a numeric address, fill in the blanks */
172 hent = &tmphent;
173 memset(&tmphent, 0, sizeof (struct hostent));
174 hent->h_addrtype = type;
175 hent->h_length = (type == AF_INET6) ?
176 sizeof (in6_addr_t) : sizeof (in_addr_t);
177 hent->h_addr_list = tmphost_addrs;
178 tmphost_addrs[0] = addr;
179 tmphost_addrs[1] = NULL;
180 } else {
181 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
182 hostNotKnownLocally = 1;
183 return (FALSE);
184 }
185 }
186
187 switch (hent->h_addrtype) {
188 case AF_INET:
189 local_sa.sin_family = AF_INET;
190 local_sa.sin_port = htons(111); /* RPCBIND port */
191 memcpy((char *)&(local_sa.sin_addr.s_addr),
192 hent->h_addr_list[0], hent->h_length);
193 rpcb_taddr.buf = (char *)&local_sa;
194 rpcb_taddr.maxlen = sizeof (local_sa);
195 rpcb_taddr.len = rpcb_taddr.maxlen;
196 break;
197 case AF_INET6:
198 local_sa6.sin6_family = AF_INET6;
199 local_sa6.sin6_port = htons(111); /* RPCBIND port */
200 memcpy((char *)&(local_sa6.sin6_addr.s6_addr),
201 hent->h_addr_list[0], hent->h_length);
202 rpcb_taddr.buf = (char *)&local_sa6;
203 rpcb_taddr.maxlen = sizeof (local_sa6);
204 rpcb_taddr.len = rpcb_taddr.maxlen;
205 break;
206 default:
207 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
208 return (FALSE);
209 }
210
211 svc_uaddr = __map_addr(nconf, &rpcb_taddr, program, version);
212 if (! svc_uaddr)
213 return (FALSE);
214
215 /* do a local uaddr2taddr and stuff in the memory supplied by the caller */
216 ipaddr = svc_uaddr;
217 ipaddrlen = strlen(ipaddr);
218 /* Look for the first '.' starting from the end */
219 for (i = ipaddrlen-1; i >= 0; i--)
220 if (ipaddr[i] == '.')
221 break;
222 /* Find the second dot (still counting from the end) */
223 for (i--; i >= 0; i--)
224 if (ipaddr[i] == '.')
225 break;
226 /* If we didn't find it, the uaddr has a syntax error */
227 if (i < 0) {
228 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
229 return (FALSE);
230 }
231 port = &ipaddr[i+1];
232 ipaddr[i] = '\0';
233 sscanf(port, "%d.%d", &p1, &p2);
234 inport = (p1 << 8) + p2;
235 if (hent->h_addrtype == AF_INET) {
236 sa = (struct sockaddr_in *)address->buf;
237 address->len = sizeof (*sa);
238 if (inet_pton(AF_INET, ipaddr, &sa->sin_addr) != 1) {
239 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
240 return (FALSE);
241 }
242 sa->sin_port = htons(inport);
243 sa->sin_family = AF_INET;
244 } else {
245 sa6 = (struct sockaddr_in6 *)address->buf;
246 address->len = sizeof (*sa6);
247 if (inet_pton(AF_INET6, ipaddr, &sa6->sin6_addr) != 1) {
248 rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
249 return (FALSE);
250 }
251 sa6->sin6_port = htons(inport);
252 sa6->sin6_family = AF_INET6;
253 }
254 return (TRUE);
255 }
256
257 /*
258 * __map_addr()
259 *
260 */
261 static char *
__map_addr(nc,rpcb_taddr,prog,ver)262 __map_addr(nc, rpcb_taddr, prog, ver)
263 struct netconfig *nc; /* Our transport */
264 struct netbuf *rpcb_taddr; /* RPCBIND address */
265 ulong_t prog, ver; /* Name service Prog/vers */
266 {
267 register CLIENT *client;
268 RPCB parms; /* Parameters for RPC binder */
269 enum clnt_stat clnt_st; /* Result from the rpc call */
270 int fd; /* Stream file descriptor */
271 char *ua = NULL; /* Universal address of service */
272 struct timeval tv; /* Timeout for our rpcb call */
273
274 /*
275 * First we open a connection to the remote rpcbind process.
276 */
277 if ((fd = t_open(nc->nc_device, O_RDWR, NULL)) == -1) {
278 rpc_createerr.cf_stat = RPC_TLIERROR;
279 return (NULL);
280 }
281
282 client = __nis_clnt_create(fd, nc, 0, rpcb_taddr, 0,
283 RPCBPROG, RPCBVERS, 0, 0);
284 if (!client) {
285 t_close(fd);
286 rpc_createerr.cf_stat = RPC_TLIERROR;
287 return (NULL);
288 }
289
290 /*
291 * Now make the call to get the NIS service address.
292 */
293 tv.tv_sec = 10;
294 tv.tv_usec = 0;
295 parms.r_prog = prog;
296 parms.r_vers = ver;
297 parms.r_netid = nc->nc_netid; /* not needed */
298 parms.r_addr = ""; /* not needed; just for xdring */
299 parms.r_owner = ""; /* not needed; just for xdring */
300 clnt_st = clnt_call(client, RPCBPROC_GETADDR, xdr_rpcb, (char *)&parms,
301 xdr_wrapstring, (char *)&ua, tv);
302
303 rpc_createerr.cf_stat = clnt_st;
304 if (clnt_st == RPC_SUCCESS) {
305
306 clnt_destroy(client);
307 t_close(fd);
308 if (*ua == '\0') {
309 xdr_free(xdr_wrapstring, (char *)&ua);
310 return (NULL);
311 }
312 return (ua);
313 } else if (((clnt_st == RPC_PROGVERSMISMATCH) ||
314 (clnt_st == RPC_PROGUNAVAIL) ||
315 (clnt_st == RPC_TIMEDOUT)) &&
316 (strcmp(nc->nc_protofmly, NC_INET) == 0)) {
317 /*
318 * version 3 not available. Try version 2
319 * The assumption here is that the netbuf
320 * is arranged in the sockaddr_in
321 * style for IP cases.
322 */
323 ushort_t port;
324 struct sockaddr_in *sa;
325 struct netbuf remote;
326 int protocol;
327 char buf[32];
328 char *res;
329
330 clnt_control(client, CLGET_SVC_ADDR, (char *)&remote);
331 sa = (struct sockaddr_in *)(remote.buf);
332 protocol = strcmp(nc->nc_proto, NC_TCP) ? IPPROTO_UDP :
333 IPPROTO_TCP;
334 port = (ushort_t)pmap_getport(sa, prog, ver, protocol);
335
336 if (port != 0) {
337 /* print s_addr (and port) in host byte order */
338 sa->sin_addr.s_addr = ntohl(sa->sin_addr.s_addr);
339 sprintf(buf, "%d.%d.%d.%d.%d.%d",
340 (sa->sin_addr.s_addr >> 24) & 0xff,
341 (sa->sin_addr.s_addr >> 16) & 0xff,
342 (sa->sin_addr.s_addr >> 8) & 0xff,
343 (sa->sin_addr.s_addr) & 0xff,
344 (port >> 8) & 0xff,
345 port & 0xff);
346 res = strdup(buf);
347 if (res != 0) {
348 rpc_createerr.cf_stat = RPC_SUCCESS;
349 } else {
350 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
351 }
352 } else {
353 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
354 res = NULL;
355 }
356 clnt_destroy(client);
357 t_close(fd);
358 return (res);
359 }
360 clnt_destroy(client);
361 t_close(fd);
362 return (NULL);
363 }
364
365 #define bcmp(s1, s2, len) memcmp(s1, s2, len)
366 #define bcopy(s1, s2, len) memcpy(s2, s1, len)
367
368 #define MAXALIASES 35
369
370 static char line[BUFSIZ+1];
371
372 static char *_hosts4_6[] = { "/etc/inet/hosts", "/etc/inet/ipnodes", 0 };
373
374 static char *any();
375
376 static struct hostent *__files_gethostent();
377
378 struct hostent *
__files_gethostbyname(char * nam,sa_family_t af)379 __files_gethostbyname(char *nam, sa_family_t af)
380 {
381 register struct hostent *hp;
382 register char **cp;
383 char **file = _hosts4_6;
384 FILE *hostf;
385
386 if ((af != AF_INET) && (af != AF_INET6))
387 return (0);
388
389 for (; *file != 0; file++) {
390
391 if ((hostf = fopen(*file, "r")) == 0)
392 continue;
393
394 while (hp = __files_gethostent(hostf)) {
395 if (hp->h_addrtype != af)
396 continue;
397 if (strcasecmp(hp->h_name, nam) == 0) {
398 (void) fclose(hostf);
399 return (hp);
400 }
401 for (cp = hp->h_aliases; cp != 0 && *cp != 0; cp++)
402 if (strcasecmp(*cp, nam) == 0) {
403 (void) fclose(hostf);
404 return (hp);
405 }
406 }
407
408 (void) fclose(hostf);
409 }
410
411 return (0);
412 }
413
414 #define isV6Addr(s) (strchr(s, (int)':') != 0)
415
416 static struct hostent *
__files_gethostent(FILE * hostf)417 __files_gethostent(FILE *hostf)
418 {
419 char *p;
420 register char *cp, **q;
421 struct in6_addr in6;
422 struct in_addr in4;
423 void *addr;
424 sa_family_t af;
425 int len;
426
427 if (hostf == NULL)
428 return (NULL);
429 again:
430 if ((p = fgets(line, BUFSIZ, hostf)) == NULL)
431 return (NULL);
432 if (*p == '#')
433 goto again;
434 cp = any(p, "#\n");
435 if (cp == NULL)
436 goto again;
437 *cp = '\0';
438 cp = any(p, " \t");
439 if (cp == NULL)
440 goto again;
441 *cp++ = '\0';
442 /* THIS STUFF IS INTERNET SPECIFIC */
443 host.h_addr_list = host_addrs;
444 if (isV6Addr(p)) {
445 af = AF_INET6;
446 addr = (void *)&in6;
447 len = sizeof (in6);
448 } else {
449 af = AF_INET;
450 addr = (void *)&in4;
451 len = sizeof (in4);
452 }
453 if (inet_pton(af, p, addr) != 1)
454 goto again;
455 bcopy(addr, host.h_addr_list[0], len);
456 host.h_length = len;
457 host.h_addrtype = af;
458 while (*cp == ' ' || *cp == '\t')
459 cp++;
460 host.h_name = cp;
461 q = host.h_aliases = host_aliases;
462 cp = any(cp, " \t");
463 if (cp != NULL)
464 *cp++ = '\0';
465 while (cp && *cp) {
466 if (*cp == ' ' || *cp == '\t') {
467 cp++;
468 continue;
469 }
470 if (q < &host_aliases[MAXALIASES - 1])
471 *q++ = cp;
472 cp = any(cp, " \t");
473 if (cp != NULL)
474 *cp++ = '\0';
475 }
476 *q = NULL;
477 return (&host);
478 }
479
480 static char *
any(cp,match)481 any(cp, match)
482 register char *cp;
483 char *match;
484 {
485 register char *mp, c;
486
487 while (c = *cp) {
488 for (mp = match; *mp; mp++)
489 if (*mp == c)
490 return (cp);
491 cp++;
492 }
493 return ((char *)0);
494 }
495