1/*
2 * Copyright (c) 1983, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
36#endif /* LIBC_SCCS and not lint */
37#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 1983, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#if defined(LIBC_SCCS) && !defined(lint)
35static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
36#endif /* LIBC_SCCS and not lint */
37#include <sys/cdefs.h>
|
38__FBSDID("$FreeBSD: head/lib/libc/net/rcmd.c 141920 2005-02-14 17:51:45Z stefanf $");
| 38__FBSDID("$FreeBSD: head/lib/libc/net/rcmd.c 146187 2005-05-13 16:31:11Z ume $");
|
39
40#include "namespace.h"
41#include <sys/param.h>
42#include <sys/socket.h>
43#include <sys/stat.h>
44
45#include <netinet/in.h>
46#include <arpa/inet.h>
47
48#include <signal.h>
49#include <fcntl.h>
50#include <netdb.h>
51#include <stdlib.h>
52#include <unistd.h>
53#include <pwd.h>
54#include <errno.h>
55#include <stdio.h>
56#include <ctype.h>
57#include <string.h>
58#include <rpc/rpc.h>
59#ifdef YP
60#include <rpcsvc/yp_prot.h>
61#include <rpcsvc/ypclnt.h>
62#endif
63#include <arpa/nameser.h>
64#include "un-namespace.h"
65
| 39
40#include "namespace.h"
41#include <sys/param.h>
42#include <sys/socket.h>
43#include <sys/stat.h>
44
45#include <netinet/in.h>
46#include <arpa/inet.h>
47
48#include <signal.h>
49#include <fcntl.h>
50#include <netdb.h>
51#include <stdlib.h>
52#include <unistd.h>
53#include <pwd.h>
54#include <errno.h>
55#include <stdio.h>
56#include <ctype.h>
57#include <string.h>
58#include <rpc/rpc.h>
59#ifdef YP
60#include <rpcsvc/yp_prot.h>
61#include <rpcsvc/ypclnt.h>
62#endif
63#include <arpa/nameser.h>
64#include "un-namespace.h"
65
|
66/* wrapper for KAME-special getnameinfo() */
67#ifndef NI_WITHSCOPEID
68#define NI_WITHSCOPEID 0
69#endif
70
| |
71extern int innetgr( const char *, const char *, const char *, const char * );
72
73#define max(a, b) ((a > b) ? a : b)
74
75int __ivaliduser(FILE *, u_int32_t, const char *, const char *);
76int __ivaliduser_af(FILE *,const void *, const char *, const char *, int, int);
77int __ivaliduser_sa(FILE *, const struct sockaddr *, socklen_t, const char *,
78 const char *);
79static int __icheckhost(const struct sockaddr *, socklen_t, const char *);
80
81char paddr[NI_MAXHOST];
82
83int
84rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
85 char **ahost;
86 u_short rport;
87 const char *locuser, *remuser, *cmd;
88 int *fd2p;
89{
90 return rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
91}
92
93int
94rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af)
95 char **ahost;
96 u_short rport;
97 const char *locuser, *remuser, *cmd;
98 int *fd2p;
99 int af;
100{
101 struct addrinfo hints, *res, *ai;
102 struct sockaddr_storage from;
103 fd_set reads;
104 sigset_t oldmask, newmask;
105 pid_t pid;
106 int s, aport, lport, timo, error;
107 char c, *p;
108 int refused, nres;
109 char num[8];
110 static char canonnamebuf[MAXDNAME]; /* is it proper here? */
111
112 /* call rcmdsh() with specified remote shell if appropriate. */
113 if (!issetugid() && (p = getenv("RSH"))) {
114 struct servent *sp = getservbyname("shell", "tcp");
115
116 if (sp && sp->s_port == rport)
117 return (rcmdsh(ahost, rport, locuser, remuser,
118 cmd, p));
119 }
120
121 /* use rsh(1) if non-root and remote port is shell. */
122 if (geteuid()) {
123 struct servent *sp = getservbyname("shell", "tcp");
124
125 if (sp && sp->s_port == rport)
126 return (rcmdsh(ahost, rport, locuser, remuser,
127 cmd, NULL));
128 }
129
130 pid = getpid();
131
132 memset(&hints, 0, sizeof(hints));
133 hints.ai_flags = AI_CANONNAME;
134 hints.ai_family = af;
135 hints.ai_socktype = SOCK_STREAM;
136 hints.ai_protocol = 0;
137 (void)snprintf(num, sizeof(num), "%d", ntohs(rport));
138 error = getaddrinfo(*ahost, num, &hints, &res);
139 if (error) {
140 fprintf(stderr, "rcmd: getaddrinfo: %s\n",
141 gai_strerror(error));
142 if (error == EAI_SYSTEM)
143 fprintf(stderr, "rcmd: getaddrinfo: %s\n",
144 strerror(errno));
145 return (-1);
146 }
147
148 if (res->ai_canonname
149 && strlen(res->ai_canonname) + 1 < sizeof(canonnamebuf)) {
150 strncpy(canonnamebuf, res->ai_canonname, sizeof(canonnamebuf));
151 *ahost = canonnamebuf;
152 }
153 nres = 0;
154 for (ai = res; ai; ai = ai->ai_next)
155 nres++;
156 ai = res;
157 refused = 0;
158 sigemptyset(&newmask);
159 sigaddset(&newmask, SIGURG);
160 _sigprocmask(SIG_BLOCK, (const sigset_t *)&newmask, &oldmask);
161 for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
162 s = rresvport_af(&lport, ai->ai_family);
163 if (s < 0) {
164 if (errno != EAGAIN && ai->ai_next) {
165 ai = ai->ai_next;
166 continue;
167 }
168 if (errno == EAGAIN)
169 (void)fprintf(stderr,
170 "rcmd: socket: All ports in use\n");
171 else
172 (void)fprintf(stderr, "rcmd: socket: %s\n",
173 strerror(errno));
174 freeaddrinfo(res);
175 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
176 NULL);
177 return (-1);
178 }
179 _fcntl(s, F_SETOWN, pid);
180 if (_connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
181 break;
182 (void)_close(s);
183 if (errno == EADDRINUSE) {
184 lport--;
185 continue;
186 }
187 if (errno == ECONNREFUSED)
188 refused = 1;
189 if (ai->ai_next == NULL && (!refused || timo > 16)) {
190 (void)fprintf(stderr, "%s: %s\n",
191 *ahost, strerror(errno));
192 freeaddrinfo(res);
193 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
194 NULL);
195 return (-1);
196 }
197 if (nres > 1) {
198 int oerrno = errno;
199
| 66extern int innetgr( const char *, const char *, const char *, const char * );
67
68#define max(a, b) ((a > b) ? a : b)
69
70int __ivaliduser(FILE *, u_int32_t, const char *, const char *);
71int __ivaliduser_af(FILE *,const void *, const char *, const char *, int, int);
72int __ivaliduser_sa(FILE *, const struct sockaddr *, socklen_t, const char *,
73 const char *);
74static int __icheckhost(const struct sockaddr *, socklen_t, const char *);
75
76char paddr[NI_MAXHOST];
77
78int
79rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
80 char **ahost;
81 u_short rport;
82 const char *locuser, *remuser, *cmd;
83 int *fd2p;
84{
85 return rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
86}
87
88int
89rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af)
90 char **ahost;
91 u_short rport;
92 const char *locuser, *remuser, *cmd;
93 int *fd2p;
94 int af;
95{
96 struct addrinfo hints, *res, *ai;
97 struct sockaddr_storage from;
98 fd_set reads;
99 sigset_t oldmask, newmask;
100 pid_t pid;
101 int s, aport, lport, timo, error;
102 char c, *p;
103 int refused, nres;
104 char num[8];
105 static char canonnamebuf[MAXDNAME]; /* is it proper here? */
106
107 /* call rcmdsh() with specified remote shell if appropriate. */
108 if (!issetugid() && (p = getenv("RSH"))) {
109 struct servent *sp = getservbyname("shell", "tcp");
110
111 if (sp && sp->s_port == rport)
112 return (rcmdsh(ahost, rport, locuser, remuser,
113 cmd, p));
114 }
115
116 /* use rsh(1) if non-root and remote port is shell. */
117 if (geteuid()) {
118 struct servent *sp = getservbyname("shell", "tcp");
119
120 if (sp && sp->s_port == rport)
121 return (rcmdsh(ahost, rport, locuser, remuser,
122 cmd, NULL));
123 }
124
125 pid = getpid();
126
127 memset(&hints, 0, sizeof(hints));
128 hints.ai_flags = AI_CANONNAME;
129 hints.ai_family = af;
130 hints.ai_socktype = SOCK_STREAM;
131 hints.ai_protocol = 0;
132 (void)snprintf(num, sizeof(num), "%d", ntohs(rport));
133 error = getaddrinfo(*ahost, num, &hints, &res);
134 if (error) {
135 fprintf(stderr, "rcmd: getaddrinfo: %s\n",
136 gai_strerror(error));
137 if (error == EAI_SYSTEM)
138 fprintf(stderr, "rcmd: getaddrinfo: %s\n",
139 strerror(errno));
140 return (-1);
141 }
142
143 if (res->ai_canonname
144 && strlen(res->ai_canonname) + 1 < sizeof(canonnamebuf)) {
145 strncpy(canonnamebuf, res->ai_canonname, sizeof(canonnamebuf));
146 *ahost = canonnamebuf;
147 }
148 nres = 0;
149 for (ai = res; ai; ai = ai->ai_next)
150 nres++;
151 ai = res;
152 refused = 0;
153 sigemptyset(&newmask);
154 sigaddset(&newmask, SIGURG);
155 _sigprocmask(SIG_BLOCK, (const sigset_t *)&newmask, &oldmask);
156 for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
157 s = rresvport_af(&lport, ai->ai_family);
158 if (s < 0) {
159 if (errno != EAGAIN && ai->ai_next) {
160 ai = ai->ai_next;
161 continue;
162 }
163 if (errno == EAGAIN)
164 (void)fprintf(stderr,
165 "rcmd: socket: All ports in use\n");
166 else
167 (void)fprintf(stderr, "rcmd: socket: %s\n",
168 strerror(errno));
169 freeaddrinfo(res);
170 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
171 NULL);
172 return (-1);
173 }
174 _fcntl(s, F_SETOWN, pid);
175 if (_connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
176 break;
177 (void)_close(s);
178 if (errno == EADDRINUSE) {
179 lport--;
180 continue;
181 }
182 if (errno == ECONNREFUSED)
183 refused = 1;
184 if (ai->ai_next == NULL && (!refused || timo > 16)) {
185 (void)fprintf(stderr, "%s: %s\n",
186 *ahost, strerror(errno));
187 freeaddrinfo(res);
188 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
189 NULL);
190 return (-1);
191 }
192 if (nres > 1) {
193 int oerrno = errno;
194
|
200 getnameinfo(ai->ai_addr, ai->ai_addrlen,
201 paddr, sizeof(paddr),
202 NULL, 0,
203 NI_NUMERICHOST|NI_WITHSCOPEID);
| 195 getnameinfo(ai->ai_addr, ai->ai_addrlen, paddr,
196 sizeof(paddr), NULL, 0, NI_NUMERICHOST);
|
204 (void)fprintf(stderr, "connect to address %s: ",
205 paddr);
206 errno = oerrno;
207 perror(0);
208 }
209 if ((ai = ai->ai_next) == NULL) {
210 /* refused && timo <= 16 */
211 struct timespec time_to_sleep, time_remaining;
212
213 time_to_sleep.tv_sec = timo;
214 time_to_sleep.tv_nsec = 0;
215 (void)_nanosleep(&time_to_sleep, &time_remaining);
216 timo *= 2;
217 ai = res;
218 refused = 0;
219 }
220 if (nres > 1) {
| 197 (void)fprintf(stderr, "connect to address %s: ",
198 paddr);
199 errno = oerrno;
200 perror(0);
201 }
202 if ((ai = ai->ai_next) == NULL) {
203 /* refused && timo <= 16 */
204 struct timespec time_to_sleep, time_remaining;
205
206 time_to_sleep.tv_sec = timo;
207 time_to_sleep.tv_nsec = 0;
208 (void)_nanosleep(&time_to_sleep, &time_remaining);
209 timo *= 2;
210 ai = res;
211 refused = 0;
212 }
213 if (nres > 1) {
|
221 getnameinfo(ai->ai_addr, ai->ai_addrlen,
222 paddr, sizeof(paddr),
223 NULL, 0,
224 NI_NUMERICHOST|NI_WITHSCOPEID);
| 214 getnameinfo(ai->ai_addr, ai->ai_addrlen, paddr,
215 sizeof(paddr), NULL, 0, NI_NUMERICHOST);
|
225 fprintf(stderr, "Trying %s...\n", paddr);
226 }
227 }
228 lport--;
229 if (fd2p == 0) {
230 _write(s, "", 1);
231 lport = 0;
232 } else {
233 int s2 = rresvport_af(&lport, ai->ai_family), s3;
234 socklen_t len = ai->ai_addrlen;
235 int nfds;
236
237 if (s2 < 0)
238 goto bad;
239 _listen(s2, 1);
240 (void)snprintf(num, sizeof(num), "%d", lport);
241 if (_write(s, num, strlen(num)+1) != strlen(num)+1) {
242 (void)fprintf(stderr,
243 "rcmd: write (setting up stderr): %s\n",
244 strerror(errno));
245 (void)_close(s2);
246 goto bad;
247 }
248 nfds = max(s, s2)+1;
249 if(nfds > FD_SETSIZE) {
250 fprintf(stderr, "rcmd: too many files\n");
251 (void)_close(s2);
252 goto bad;
253 }
254again:
255 FD_ZERO(&reads);
256 FD_SET(s, &reads);
257 FD_SET(s2, &reads);
258 errno = 0;
259 if (_select(nfds, &reads, 0, 0, 0) < 1 || !FD_ISSET(s2, &reads)){
260 if (errno != 0)
261 (void)fprintf(stderr,
262 "rcmd: select (setting up stderr): %s\n",
263 strerror(errno));
264 else
265 (void)fprintf(stderr,
266 "select: protocol failure in circuit setup\n");
267 (void)_close(s2);
268 goto bad;
269 }
270 s3 = _accept(s2, (struct sockaddr *)&from, &len);
271 switch (from.ss_family) {
272 case AF_INET:
273 aport = ntohs(((struct sockaddr_in *)&from)->sin_port);
274 break;
275#ifdef INET6
276 case AF_INET6:
277 aport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
278 break;
279#endif
280 default:
281 aport = 0; /* error */
282 break;
283 }
284 /*
285 * XXX careful for ftp bounce attacks. If discovered, shut them
286 * down and check for the real auxiliary channel to connect.
287 */
288 if (aport == 20) {
289 _close(s3);
290 goto again;
291 }
292 (void)_close(s2);
293 if (s3 < 0) {
294 (void)fprintf(stderr,
295 "rcmd: accept: %s\n", strerror(errno));
296 lport = 0;
297 goto bad;
298 }
299 *fd2p = s3;
300 if (aport >= IPPORT_RESERVED || aport < IPPORT_RESERVED / 2) {
301 (void)fprintf(stderr,
302 "socket: protocol failure in circuit setup.\n");
303 goto bad2;
304 }
305 }
306 (void)_write(s, locuser, strlen(locuser)+1);
307 (void)_write(s, remuser, strlen(remuser)+1);
308 (void)_write(s, cmd, strlen(cmd)+1);
309 if (_read(s, &c, 1) != 1) {
310 (void)fprintf(stderr,
311 "rcmd: %s: %s\n", *ahost, strerror(errno));
312 goto bad2;
313 }
314 if (c != 0) {
315 while (_read(s, &c, 1) == 1) {
316 (void)_write(STDERR_FILENO, &c, 1);
317 if (c == '\n')
318 break;
319 }
320 goto bad2;
321 }
322 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
323 freeaddrinfo(res);
324 return (s);
325bad2:
326 if (lport)
327 (void)_close(*fd2p);
328bad:
329 (void)_close(s);
330 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
331 freeaddrinfo(res);
332 return (-1);
333}
334
335int
336rresvport(port)
337 int *port;
338{
339 return rresvport_af(port, AF_INET);
340}
341
342int
343rresvport_af(alport, family)
344 int *alport, family;
345{
346 int s;
347 struct sockaddr_storage ss;
348 u_short *sport;
349
350 memset(&ss, 0, sizeof(ss));
351 ss.ss_family = family;
352 switch (family) {
353 case AF_INET:
354 ((struct sockaddr *)&ss)->sa_len = sizeof(struct sockaddr_in);
355 sport = &((struct sockaddr_in *)&ss)->sin_port;
356 ((struct sockaddr_in *)&ss)->sin_addr.s_addr = INADDR_ANY;
357 break;
358#ifdef INET6
359 case AF_INET6:
360 ((struct sockaddr *)&ss)->sa_len = sizeof(struct sockaddr_in6);
361 sport = &((struct sockaddr_in6 *)&ss)->sin6_port;
362 ((struct sockaddr_in6 *)&ss)->sin6_addr = in6addr_any;
363 break;
364#endif
365 default:
366 errno = EAFNOSUPPORT;
367 return -1;
368 }
369
370 s = _socket(ss.ss_family, SOCK_STREAM, 0);
371 if (s < 0)
372 return (-1);
373#if 0 /* compat_exact_traditional_rresvport_semantics */
374 sin.sin_port = htons((u_short)*alport);
375 if (_bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
376 return (s);
377 if (errno != EADDRINUSE) {
378 (void)_close(s);
379 return (-1);
380 }
381#endif
382 *sport = 0;
383 if (bindresvport_sa(s, (struct sockaddr *)&ss) == -1) {
384 (void)_close(s);
385 return (-1);
386 }
387 *alport = (int)ntohs(*sport);
388 return (s);
389}
390
391int __check_rhosts_file = 1;
392char *__rcmd_errstr;
393
394int
395ruserok(rhost, superuser, ruser, luser)
396 const char *rhost, *ruser, *luser;
397 int superuser;
398{
399 struct addrinfo hints, *res, *r;
400 int error;
401
402 memset(&hints, 0, sizeof(hints));
403 hints.ai_family = PF_UNSPEC;
404 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
405 error = getaddrinfo(rhost, "0", &hints, &res);
406 if (error)
407 return (-1);
408
409 for (r = res; r; r = r->ai_next) {
410 if (iruserok_sa(r->ai_addr, r->ai_addrlen, superuser, ruser,
411 luser) == 0) {
412 freeaddrinfo(res);
413 return (0);
414 }
415 }
416 freeaddrinfo(res);
417 return (-1);
418}
419
420/*
421 * New .rhosts strategy: We are passed an ip address. We spin through
422 * hosts.equiv and .rhosts looking for a match. When the .rhosts only
423 * has ip addresses, we don't have to trust a nameserver. When it
424 * contains hostnames, we spin through the list of addresses the nameserver
425 * gives us and look for a match.
426 *
427 * Returns 0 if ok, -1 if not ok.
428 */
429int
430iruserok(raddr, superuser, ruser, luser)
431 unsigned long raddr;
432 int superuser;
433 const char *ruser, *luser;
434{
435 struct sockaddr_in sin;
436
437 memset(&sin, 0, sizeof(sin));
438 sin.sin_family = AF_INET;
439 sin.sin_len = sizeof(struct sockaddr_in);
440 memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
441 return iruserok_sa((struct sockaddr *)&sin, sin.sin_len, superuser,
442 ruser, luser);
443}
444
445/*
446 * AF independent extension of iruserok.
447 *
448 * Returns 0 if ok, -1 if not ok.
449 */
450int
451iruserok_sa(ra, rlen, superuser, ruser, luser)
452 const void *ra;
453 int rlen;
454 int superuser;
455 const char *ruser, *luser;
456{
457 char *cp;
458 struct stat sbuf;
459 struct passwd *pwd;
460 FILE *hostf;
461 uid_t uid;
462 int first;
463 char pbuf[MAXPATHLEN];
464 const struct sockaddr *raddr;
465 struct sockaddr_storage ss;
466
467 /* avoid alignment issue */
468 if (rlen > sizeof(ss))
469 return(-1);
470 memcpy(&ss, ra, rlen);
471 raddr = (struct sockaddr *)&ss;
472
473 first = 1;
474 hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "r");
475again:
476 if (hostf) {
477 if (__ivaliduser_sa(hostf, raddr, rlen, luser, ruser) == 0) {
478 (void)fclose(hostf);
479 return (0);
480 }
481 (void)fclose(hostf);
482 }
483 if (first == 1 && (__check_rhosts_file || superuser)) {
484 first = 0;
485 if ((pwd = getpwnam(luser)) == NULL)
486 return (-1);
487 (void)strcpy(pbuf, pwd->pw_dir);
488 (void)strcat(pbuf, "/.rhosts");
489
490 /*
491 * Change effective uid while opening .rhosts. If root and
492 * reading an NFS mounted file system, can't read files that
493 * are protected read/write owner only.
494 */
495 uid = geteuid();
496 (void)seteuid(pwd->pw_uid);
497 hostf = fopen(pbuf, "r");
498 (void)seteuid(uid);
499
500 if (hostf == NULL)
501 return (-1);
502 /*
503 * If not a regular file, or is owned by someone other than
504 * user or root or if writeable by anyone but the owner, quit.
505 */
506 cp = NULL;
507 if (lstat(pbuf, &sbuf) < 0)
508 cp = ".rhosts lstat failed";
509 else if (!S_ISREG(sbuf.st_mode))
510 cp = ".rhosts not regular file";
511 else if (_fstat(fileno(hostf), &sbuf) < 0)
512 cp = ".rhosts fstat failed";
513 else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
514 cp = "bad .rhosts owner";
515 else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
516 cp = ".rhosts writeable by other than owner";
517 /* If there were any problems, quit. */
518 if (cp) {
519 __rcmd_errstr = cp;
520 (void)fclose(hostf);
521 return (-1);
522 }
523 goto again;
524 }
525 return (-1);
526}
527
528/*
529 * XXX
530 * Don't make static, used by lpd(8).
531 *
532 * Returns 0 if ok, -1 if not ok.
533 */
534int
535__ivaliduser(hostf, raddr, luser, ruser)
536 FILE *hostf;
537 u_int32_t raddr;
538 const char *luser, *ruser;
539{
540 struct sockaddr_in sin;
541
542 memset(&sin, 0, sizeof(sin));
543 sin.sin_family = AF_INET;
544 sin.sin_len = sizeof(struct sockaddr_in);
545 memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
546 return __ivaliduser_sa(hostf, (struct sockaddr *)&sin, sin.sin_len,
547 luser, ruser);
548}
549
550/*
551 * Returns 0 if ok, -1 if not ok.
552 *
553 * XXX obsolete API.
554 */
555int
556__ivaliduser_af(hostf, raddr, luser, ruser, af, len)
557 FILE *hostf;
558 const void *raddr;
559 const char *luser, *ruser;
560 int af, len;
561{
562 struct sockaddr *sa = NULL;
563 struct sockaddr_in *sin = NULL;
564#ifdef INET6
565 struct sockaddr_in6 *sin6 = NULL;
566#endif
567 struct sockaddr_storage ss;
568
569 memset(&ss, 0, sizeof(ss));
570 switch (af) {
571 case AF_INET:
572 if (len != sizeof(sin->sin_addr))
573 return -1;
574 sin = (struct sockaddr_in *)&ss;
575 sin->sin_family = AF_INET;
576 sin->sin_len = sizeof(struct sockaddr_in);
577 memcpy(&sin->sin_addr, raddr, sizeof(sin->sin_addr));
578 break;
579#ifdef INET6
580 case AF_INET6:
581 if (len != sizeof(sin6->sin6_addr))
582 return -1;
583 /* you will lose scope info */
584 sin6 = (struct sockaddr_in6 *)&ss;
585 sin6->sin6_family = AF_INET6;
586 sin6->sin6_len = sizeof(struct sockaddr_in6);
587 memcpy(&sin6->sin6_addr, raddr, sizeof(sin6->sin6_addr));
588 break;
589#endif
590 default:
591 return -1;
592 }
593
594 sa = (struct sockaddr *)&ss;
595 return __ivaliduser_sa(hostf, sa, sa->sa_len, luser, ruser);
596}
597
598int
599__ivaliduser_sa(hostf, raddr, salen, luser, ruser)
600 FILE *hostf;
601 const struct sockaddr *raddr;
602 socklen_t salen;
603 const char *luser, *ruser;
604{
605 char *user, *p;
606 int ch;
607 char buf[MAXHOSTNAMELEN + 128]; /* host + login */
608 char hname[MAXHOSTNAMELEN];
609 /* Presumed guilty until proven innocent. */
610 int userok = 0, hostok = 0;
611#ifdef YP
612 char *ypdomain;
613
614 if (yp_get_default_domain(&ypdomain))
615 ypdomain = NULL;
616#else
617#define ypdomain NULL
618#endif
619 /* We need to get the damn hostname back for netgroup matching. */
620 if (getnameinfo(raddr, salen, hname, sizeof(hname), NULL, 0,
621 NI_NAMEREQD) != 0)
622 hname[0] = '\0';
623
624 while (fgets(buf, sizeof(buf), hostf)) {
625 p = buf;
626 /* Skip lines that are too long. */
627 if (strchr(p, '\n') == NULL) {
628 while ((ch = getc(hostf)) != '\n' && ch != EOF);
629 continue;
630 }
631 if (*p == '\n' || *p == '#') {
632 /* comment... */
633 continue;
634 }
635 while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
636 *p = isupper((unsigned char)*p) ? tolower((unsigned char)*p) : *p;
637 p++;
638 }
639 if (*p == ' ' || *p == '\t') {
640 *p++ = '\0';
641 while (*p == ' ' || *p == '\t')
642 p++;
643 user = p;
644 while (*p != '\n' && *p != ' ' &&
645 *p != '\t' && *p != '\0')
646 p++;
647 } else
648 user = p;
649 *p = '\0';
650 /*
651 * Do +/- and +@/-@ checking. This looks really nasty,
652 * but it matches SunOS's behavior so far as I can tell.
653 */
654 switch(buf[0]) {
655 case '+':
656 if (!buf[1]) { /* '+' matches all hosts */
657 hostok = 1;
658 break;
659 }
660 if (buf[1] == '@') /* match a host by netgroup */
661 hostok = hname[0] != '\0' &&
662 innetgr(&buf[2], hname, NULL, ypdomain);
663 else /* match a host by addr */
664 hostok = __icheckhost(raddr, salen,
665 (char *)&buf[1]);
666 break;
667 case '-': /* reject '-' hosts and all their users */
668 if (buf[1] == '@') {
669 if (hname[0] == '\0' ||
670 innetgr(&buf[2], hname, NULL, ypdomain))
671 return(-1);
672 } else {
673 if (__icheckhost(raddr, salen,
674 (char *)&buf[1]))
675 return(-1);
676 }
677 break;
678 default: /* if no '+' or '-', do a simple match */
679 hostok = __icheckhost(raddr, salen, buf);
680 break;
681 }
682 switch(*user) {
683 case '+':
684 if (!*(user+1)) { /* '+' matches all users */
685 userok = 1;
686 break;
687 }
688 if (*(user+1) == '@') /* match a user by netgroup */
689 userok = innetgr(user+2, NULL, ruser, ypdomain);
690 else /* match a user by direct specification */
691 userok = !(strcmp(ruser, user+1));
692 break;
693 case '-': /* if we matched a hostname, */
694 if (hostok) { /* check for user field rejections */
695 if (!*(user+1))
696 return(-1);
697 if (*(user+1) == '@') {
698 if (innetgr(user+2, NULL,
699 ruser, ypdomain))
700 return(-1);
701 } else {
702 if (!strcmp(ruser, user+1))
703 return(-1);
704 }
705 }
706 break;
707 default: /* no rejections: try to match the user */
708 if (hostok)
709 userok = !(strcmp(ruser,*user ? user : luser));
710 break;
711 }
712 if (hostok && userok)
713 return(0);
714 }
715 return (-1);
716}
717
718/*
719 * Returns "true" if match, 0 if no match.
| 216 fprintf(stderr, "Trying %s...\n", paddr);
217 }
218 }
219 lport--;
220 if (fd2p == 0) {
221 _write(s, "", 1);
222 lport = 0;
223 } else {
224 int s2 = rresvport_af(&lport, ai->ai_family), s3;
225 socklen_t len = ai->ai_addrlen;
226 int nfds;
227
228 if (s2 < 0)
229 goto bad;
230 _listen(s2, 1);
231 (void)snprintf(num, sizeof(num), "%d", lport);
232 if (_write(s, num, strlen(num)+1) != strlen(num)+1) {
233 (void)fprintf(stderr,
234 "rcmd: write (setting up stderr): %s\n",
235 strerror(errno));
236 (void)_close(s2);
237 goto bad;
238 }
239 nfds = max(s, s2)+1;
240 if(nfds > FD_SETSIZE) {
241 fprintf(stderr, "rcmd: too many files\n");
242 (void)_close(s2);
243 goto bad;
244 }
245again:
246 FD_ZERO(&reads);
247 FD_SET(s, &reads);
248 FD_SET(s2, &reads);
249 errno = 0;
250 if (_select(nfds, &reads, 0, 0, 0) < 1 || !FD_ISSET(s2, &reads)){
251 if (errno != 0)
252 (void)fprintf(stderr,
253 "rcmd: select (setting up stderr): %s\n",
254 strerror(errno));
255 else
256 (void)fprintf(stderr,
257 "select: protocol failure in circuit setup\n");
258 (void)_close(s2);
259 goto bad;
260 }
261 s3 = _accept(s2, (struct sockaddr *)&from, &len);
262 switch (from.ss_family) {
263 case AF_INET:
264 aport = ntohs(((struct sockaddr_in *)&from)->sin_port);
265 break;
266#ifdef INET6
267 case AF_INET6:
268 aport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
269 break;
270#endif
271 default:
272 aport = 0; /* error */
273 break;
274 }
275 /*
276 * XXX careful for ftp bounce attacks. If discovered, shut them
277 * down and check for the real auxiliary channel to connect.
278 */
279 if (aport == 20) {
280 _close(s3);
281 goto again;
282 }
283 (void)_close(s2);
284 if (s3 < 0) {
285 (void)fprintf(stderr,
286 "rcmd: accept: %s\n", strerror(errno));
287 lport = 0;
288 goto bad;
289 }
290 *fd2p = s3;
291 if (aport >= IPPORT_RESERVED || aport < IPPORT_RESERVED / 2) {
292 (void)fprintf(stderr,
293 "socket: protocol failure in circuit setup.\n");
294 goto bad2;
295 }
296 }
297 (void)_write(s, locuser, strlen(locuser)+1);
298 (void)_write(s, remuser, strlen(remuser)+1);
299 (void)_write(s, cmd, strlen(cmd)+1);
300 if (_read(s, &c, 1) != 1) {
301 (void)fprintf(stderr,
302 "rcmd: %s: %s\n", *ahost, strerror(errno));
303 goto bad2;
304 }
305 if (c != 0) {
306 while (_read(s, &c, 1) == 1) {
307 (void)_write(STDERR_FILENO, &c, 1);
308 if (c == '\n')
309 break;
310 }
311 goto bad2;
312 }
313 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
314 freeaddrinfo(res);
315 return (s);
316bad2:
317 if (lport)
318 (void)_close(*fd2p);
319bad:
320 (void)_close(s);
321 _sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
322 freeaddrinfo(res);
323 return (-1);
324}
325
326int
327rresvport(port)
328 int *port;
329{
330 return rresvport_af(port, AF_INET);
331}
332
333int
334rresvport_af(alport, family)
335 int *alport, family;
336{
337 int s;
338 struct sockaddr_storage ss;
339 u_short *sport;
340
341 memset(&ss, 0, sizeof(ss));
342 ss.ss_family = family;
343 switch (family) {
344 case AF_INET:
345 ((struct sockaddr *)&ss)->sa_len = sizeof(struct sockaddr_in);
346 sport = &((struct sockaddr_in *)&ss)->sin_port;
347 ((struct sockaddr_in *)&ss)->sin_addr.s_addr = INADDR_ANY;
348 break;
349#ifdef INET6
350 case AF_INET6:
351 ((struct sockaddr *)&ss)->sa_len = sizeof(struct sockaddr_in6);
352 sport = &((struct sockaddr_in6 *)&ss)->sin6_port;
353 ((struct sockaddr_in6 *)&ss)->sin6_addr = in6addr_any;
354 break;
355#endif
356 default:
357 errno = EAFNOSUPPORT;
358 return -1;
359 }
360
361 s = _socket(ss.ss_family, SOCK_STREAM, 0);
362 if (s < 0)
363 return (-1);
364#if 0 /* compat_exact_traditional_rresvport_semantics */
365 sin.sin_port = htons((u_short)*alport);
366 if (_bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
367 return (s);
368 if (errno != EADDRINUSE) {
369 (void)_close(s);
370 return (-1);
371 }
372#endif
373 *sport = 0;
374 if (bindresvport_sa(s, (struct sockaddr *)&ss) == -1) {
375 (void)_close(s);
376 return (-1);
377 }
378 *alport = (int)ntohs(*sport);
379 return (s);
380}
381
382int __check_rhosts_file = 1;
383char *__rcmd_errstr;
384
385int
386ruserok(rhost, superuser, ruser, luser)
387 const char *rhost, *ruser, *luser;
388 int superuser;
389{
390 struct addrinfo hints, *res, *r;
391 int error;
392
393 memset(&hints, 0, sizeof(hints));
394 hints.ai_family = PF_UNSPEC;
395 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
396 error = getaddrinfo(rhost, "0", &hints, &res);
397 if (error)
398 return (-1);
399
400 for (r = res; r; r = r->ai_next) {
401 if (iruserok_sa(r->ai_addr, r->ai_addrlen, superuser, ruser,
402 luser) == 0) {
403 freeaddrinfo(res);
404 return (0);
405 }
406 }
407 freeaddrinfo(res);
408 return (-1);
409}
410
411/*
412 * New .rhosts strategy: We are passed an ip address. We spin through
413 * hosts.equiv and .rhosts looking for a match. When the .rhosts only
414 * has ip addresses, we don't have to trust a nameserver. When it
415 * contains hostnames, we spin through the list of addresses the nameserver
416 * gives us and look for a match.
417 *
418 * Returns 0 if ok, -1 if not ok.
419 */
420int
421iruserok(raddr, superuser, ruser, luser)
422 unsigned long raddr;
423 int superuser;
424 const char *ruser, *luser;
425{
426 struct sockaddr_in sin;
427
428 memset(&sin, 0, sizeof(sin));
429 sin.sin_family = AF_INET;
430 sin.sin_len = sizeof(struct sockaddr_in);
431 memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
432 return iruserok_sa((struct sockaddr *)&sin, sin.sin_len, superuser,
433 ruser, luser);
434}
435
436/*
437 * AF independent extension of iruserok.
438 *
439 * Returns 0 if ok, -1 if not ok.
440 */
441int
442iruserok_sa(ra, rlen, superuser, ruser, luser)
443 const void *ra;
444 int rlen;
445 int superuser;
446 const char *ruser, *luser;
447{
448 char *cp;
449 struct stat sbuf;
450 struct passwd *pwd;
451 FILE *hostf;
452 uid_t uid;
453 int first;
454 char pbuf[MAXPATHLEN];
455 const struct sockaddr *raddr;
456 struct sockaddr_storage ss;
457
458 /* avoid alignment issue */
459 if (rlen > sizeof(ss))
460 return(-1);
461 memcpy(&ss, ra, rlen);
462 raddr = (struct sockaddr *)&ss;
463
464 first = 1;
465 hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "r");
466again:
467 if (hostf) {
468 if (__ivaliduser_sa(hostf, raddr, rlen, luser, ruser) == 0) {
469 (void)fclose(hostf);
470 return (0);
471 }
472 (void)fclose(hostf);
473 }
474 if (first == 1 && (__check_rhosts_file || superuser)) {
475 first = 0;
476 if ((pwd = getpwnam(luser)) == NULL)
477 return (-1);
478 (void)strcpy(pbuf, pwd->pw_dir);
479 (void)strcat(pbuf, "/.rhosts");
480
481 /*
482 * Change effective uid while opening .rhosts. If root and
483 * reading an NFS mounted file system, can't read files that
484 * are protected read/write owner only.
485 */
486 uid = geteuid();
487 (void)seteuid(pwd->pw_uid);
488 hostf = fopen(pbuf, "r");
489 (void)seteuid(uid);
490
491 if (hostf == NULL)
492 return (-1);
493 /*
494 * If not a regular file, or is owned by someone other than
495 * user or root or if writeable by anyone but the owner, quit.
496 */
497 cp = NULL;
498 if (lstat(pbuf, &sbuf) < 0)
499 cp = ".rhosts lstat failed";
500 else if (!S_ISREG(sbuf.st_mode))
501 cp = ".rhosts not regular file";
502 else if (_fstat(fileno(hostf), &sbuf) < 0)
503 cp = ".rhosts fstat failed";
504 else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
505 cp = "bad .rhosts owner";
506 else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
507 cp = ".rhosts writeable by other than owner";
508 /* If there were any problems, quit. */
509 if (cp) {
510 __rcmd_errstr = cp;
511 (void)fclose(hostf);
512 return (-1);
513 }
514 goto again;
515 }
516 return (-1);
517}
518
519/*
520 * XXX
521 * Don't make static, used by lpd(8).
522 *
523 * Returns 0 if ok, -1 if not ok.
524 */
525int
526__ivaliduser(hostf, raddr, luser, ruser)
527 FILE *hostf;
528 u_int32_t raddr;
529 const char *luser, *ruser;
530{
531 struct sockaddr_in sin;
532
533 memset(&sin, 0, sizeof(sin));
534 sin.sin_family = AF_INET;
535 sin.sin_len = sizeof(struct sockaddr_in);
536 memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
537 return __ivaliduser_sa(hostf, (struct sockaddr *)&sin, sin.sin_len,
538 luser, ruser);
539}
540
541/*
542 * Returns 0 if ok, -1 if not ok.
543 *
544 * XXX obsolete API.
545 */
546int
547__ivaliduser_af(hostf, raddr, luser, ruser, af, len)
548 FILE *hostf;
549 const void *raddr;
550 const char *luser, *ruser;
551 int af, len;
552{
553 struct sockaddr *sa = NULL;
554 struct sockaddr_in *sin = NULL;
555#ifdef INET6
556 struct sockaddr_in6 *sin6 = NULL;
557#endif
558 struct sockaddr_storage ss;
559
560 memset(&ss, 0, sizeof(ss));
561 switch (af) {
562 case AF_INET:
563 if (len != sizeof(sin->sin_addr))
564 return -1;
565 sin = (struct sockaddr_in *)&ss;
566 sin->sin_family = AF_INET;
567 sin->sin_len = sizeof(struct sockaddr_in);
568 memcpy(&sin->sin_addr, raddr, sizeof(sin->sin_addr));
569 break;
570#ifdef INET6
571 case AF_INET6:
572 if (len != sizeof(sin6->sin6_addr))
573 return -1;
574 /* you will lose scope info */
575 sin6 = (struct sockaddr_in6 *)&ss;
576 sin6->sin6_family = AF_INET6;
577 sin6->sin6_len = sizeof(struct sockaddr_in6);
578 memcpy(&sin6->sin6_addr, raddr, sizeof(sin6->sin6_addr));
579 break;
580#endif
581 default:
582 return -1;
583 }
584
585 sa = (struct sockaddr *)&ss;
586 return __ivaliduser_sa(hostf, sa, sa->sa_len, luser, ruser);
587}
588
589int
590__ivaliduser_sa(hostf, raddr, salen, luser, ruser)
591 FILE *hostf;
592 const struct sockaddr *raddr;
593 socklen_t salen;
594 const char *luser, *ruser;
595{
596 char *user, *p;
597 int ch;
598 char buf[MAXHOSTNAMELEN + 128]; /* host + login */
599 char hname[MAXHOSTNAMELEN];
600 /* Presumed guilty until proven innocent. */
601 int userok = 0, hostok = 0;
602#ifdef YP
603 char *ypdomain;
604
605 if (yp_get_default_domain(&ypdomain))
606 ypdomain = NULL;
607#else
608#define ypdomain NULL
609#endif
610 /* We need to get the damn hostname back for netgroup matching. */
611 if (getnameinfo(raddr, salen, hname, sizeof(hname), NULL, 0,
612 NI_NAMEREQD) != 0)
613 hname[0] = '\0';
614
615 while (fgets(buf, sizeof(buf), hostf)) {
616 p = buf;
617 /* Skip lines that are too long. */
618 if (strchr(p, '\n') == NULL) {
619 while ((ch = getc(hostf)) != '\n' && ch != EOF);
620 continue;
621 }
622 if (*p == '\n' || *p == '#') {
623 /* comment... */
624 continue;
625 }
626 while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
627 *p = isupper((unsigned char)*p) ? tolower((unsigned char)*p) : *p;
628 p++;
629 }
630 if (*p == ' ' || *p == '\t') {
631 *p++ = '\0';
632 while (*p == ' ' || *p == '\t')
633 p++;
634 user = p;
635 while (*p != '\n' && *p != ' ' &&
636 *p != '\t' && *p != '\0')
637 p++;
638 } else
639 user = p;
640 *p = '\0';
641 /*
642 * Do +/- and +@/-@ checking. This looks really nasty,
643 * but it matches SunOS's behavior so far as I can tell.
644 */
645 switch(buf[0]) {
646 case '+':
647 if (!buf[1]) { /* '+' matches all hosts */
648 hostok = 1;
649 break;
650 }
651 if (buf[1] == '@') /* match a host by netgroup */
652 hostok = hname[0] != '\0' &&
653 innetgr(&buf[2], hname, NULL, ypdomain);
654 else /* match a host by addr */
655 hostok = __icheckhost(raddr, salen,
656 (char *)&buf[1]);
657 break;
658 case '-': /* reject '-' hosts and all their users */
659 if (buf[1] == '@') {
660 if (hname[0] == '\0' ||
661 innetgr(&buf[2], hname, NULL, ypdomain))
662 return(-1);
663 } else {
664 if (__icheckhost(raddr, salen,
665 (char *)&buf[1]))
666 return(-1);
667 }
668 break;
669 default: /* if no '+' or '-', do a simple match */
670 hostok = __icheckhost(raddr, salen, buf);
671 break;
672 }
673 switch(*user) {
674 case '+':
675 if (!*(user+1)) { /* '+' matches all users */
676 userok = 1;
677 break;
678 }
679 if (*(user+1) == '@') /* match a user by netgroup */
680 userok = innetgr(user+2, NULL, ruser, ypdomain);
681 else /* match a user by direct specification */
682 userok = !(strcmp(ruser, user+1));
683 break;
684 case '-': /* if we matched a hostname, */
685 if (hostok) { /* check for user field rejections */
686 if (!*(user+1))
687 return(-1);
688 if (*(user+1) == '@') {
689 if (innetgr(user+2, NULL,
690 ruser, ypdomain))
691 return(-1);
692 } else {
693 if (!strcmp(ruser, user+1))
694 return(-1);
695 }
696 }
697 break;
698 default: /* no rejections: try to match the user */
699 if (hostok)
700 userok = !(strcmp(ruser,*user ? user : luser));
701 break;
702 }
703 if (hostok && userok)
704 return(0);
705 }
706 return (-1);
707}
708
709/*
710 * Returns "true" if match, 0 if no match.
|
720 *
721 * NI_WITHSCOPEID is useful for comparing sin6_scope_id portion
722 * if af == AF_INET6.
| |
723 */
724static int
725__icheckhost(raddr, salen, lhost)
726 const struct sockaddr *raddr;
727 socklen_t salen;
728 const char *lhost;
729{
730 struct sockaddr_in sin;
731 struct sockaddr_in6 *sin6;
732 struct addrinfo hints, *res, *r;
733 int error;
734 char h1[NI_MAXHOST], h2[NI_MAXHOST];
735
736 if (raddr->sa_family == AF_INET6) {
737 sin6 = (struct sockaddr_in6 *)raddr;
738 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
739 memset(&sin, 0, sizeof(sin));
740 sin.sin_family = AF_INET;
741 sin.sin_len = sizeof(struct sockaddr_in);
742 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
743 sizeof(sin.sin_addr));
744 raddr = (struct sockaddr *)&sin;
745 salen = sin.sin_len;
746 }
747 }
748
749 h1[0] = '\0';
750 if (getnameinfo(raddr, salen, h1, sizeof(h1), NULL, 0,
| 711 */
712static int
713__icheckhost(raddr, salen, lhost)
714 const struct sockaddr *raddr;
715 socklen_t salen;
716 const char *lhost;
717{
718 struct sockaddr_in sin;
719 struct sockaddr_in6 *sin6;
720 struct addrinfo hints, *res, *r;
721 int error;
722 char h1[NI_MAXHOST], h2[NI_MAXHOST];
723
724 if (raddr->sa_family == AF_INET6) {
725 sin6 = (struct sockaddr_in6 *)raddr;
726 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
727 memset(&sin, 0, sizeof(sin));
728 sin.sin_family = AF_INET;
729 sin.sin_len = sizeof(struct sockaddr_in);
730 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
731 sizeof(sin.sin_addr));
732 raddr = (struct sockaddr *)&sin;
733 salen = sin.sin_len;
734 }
735 }
736
737 h1[0] = '\0';
738 if (getnameinfo(raddr, salen, h1, sizeof(h1), NULL, 0,
|
751 NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
| 739 NI_NUMERICHOST) != 0)
|
752 return (0);
753
754 /* Resolve laddr into sockaddr */
755 memset(&hints, 0, sizeof(hints));
756 hints.ai_family = raddr->sa_family;
757 hints.ai_socktype = SOCK_DGRAM; /*XXX dummy*/
758 res = NULL;
759 error = getaddrinfo(lhost, "0", &hints, &res);
760 if (error)
761 return (0);
762
763 for (r = res; r ; r = r->ai_next) {
764 h2[0] = '\0';
765 if (getnameinfo(r->ai_addr, r->ai_addrlen, h2, sizeof(h2),
| 740 return (0);
741
742 /* Resolve laddr into sockaddr */
743 memset(&hints, 0, sizeof(hints));
744 hints.ai_family = raddr->sa_family;
745 hints.ai_socktype = SOCK_DGRAM; /*XXX dummy*/
746 res = NULL;
747 error = getaddrinfo(lhost, "0", &hints, &res);
748 if (error)
749 return (0);
750
751 for (r = res; r ; r = r->ai_next) {
752 h2[0] = '\0';
753 if (getnameinfo(r->ai_addr, r->ai_addrlen, h2, sizeof(h2),
|
766 NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
| 754 NULL, 0, NI_NUMERICHOST) != 0)
|
767 continue;
768 if (strcmp(h1, h2) == 0) {
769 freeaddrinfo(res);
770 return (1);
771 }
772 }
773
774 /* No match. */
775 freeaddrinfo(res);
776 return (0);
777}
| 755 continue;
756 if (strcmp(h1, h2) == 0) {
757 freeaddrinfo(res);
758 return (1);
759 }
760 }
761
762 /* No match. */
763 freeaddrinfo(res);
764 return (0);
765}
|