20 */
21
22#ifndef lint
23static char sccsid[] = "@(#) hosts_access.c 1.21 97/02/12 02:13:22";
24#endif
25
26/* System libraries. */
27
28#include <sys/types.h>
29#ifdef INT32_T
30 typedef uint32_t u_int32_t;
31#endif
32#include <sys/param.h>
33#ifdef INET6
34#include <sys/socket.h>
35#endif
36#include <netinet/in.h>
37#include <arpa/inet.h>
38#include <stdio.h>
39#include <syslog.h>
40#include <ctype.h>
41#include <errno.h>
42#include <setjmp.h>
43#include <string.h>
44#ifdef INET6
45#include <netdb.h>
46#endif
47
48extern char *fgets();
49extern int errno;
50
51#ifndef INADDR_NONE
52#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
53#endif
54
55/* Local stuff. */
56
57#include "tcpd.h"
58
59/* Error handling. */
60
61extern jmp_buf tcpd_buf;
62
63/* Delimiters for lists of daemons or clients. */
64
65static char sep[] = ", \t\r\n";
66
67/* Constants to be used in assignments only, not in comparisons... */
68
69#define YES 1
70#define NO 0
71
72 /*
73 * These variables are globally visible so that they can be redirected in
74 * verification mode.
75 */
76
77char *hosts_allow_table = HOSTS_ALLOW;
78char *hosts_deny_table = HOSTS_DENY;
79int hosts_access_verbose = 0;
80
81 /*
82 * In a long-running process, we are not at liberty to just go away.
83 */
84
85int resident = (-1); /* -1, 0: unknown; +1: yes */
86
87/* Forward declarations. */
88
89static int table_match();
90static int list_match();
91static int server_match();
92static int client_match();
93static int host_match();
94static int string_match();
95static int masked_match();
96#ifdef INET6
97static int masked_match4();
98static int masked_match6();
99#endif
100
101/* Size of logical line buffer. */
102
103#define BUFLEN 2048
104
105/* hosts_access - host access control facility */
106
107int hosts_access(request)
108struct request_info *request;
109{
110 int verdict;
111
112 /*
113 * If the (daemon, client) pair is matched by an entry in the file
114 * /etc/hosts.allow, access is granted. Otherwise, if the (daemon,
115 * client) pair is matched by an entry in the file /etc/hosts.deny,
116 * access is denied. Otherwise, access is granted. A non-existent
117 * access-control file is treated as an empty file.
118 *
119 * After a rule has been matched, the optional language extensions may
120 * decide to grant or refuse service anyway. Or, while a rule is being
121 * processed, a serious error is found, and it seems better to play safe
122 * and deny service. All this is done by jumping back into the
123 * hosts_access() routine, bypassing the regular return from the
124 * table_match() function calls below.
125 */
126
127 if (resident <= 0)
128 resident++;
129 verdict = setjmp(tcpd_buf);
130 if (verdict != 0)
131 return (verdict == AC_PERMIT);
132 if (table_match(hosts_allow_table, request))
133 return (YES);
134 if (table_match(hosts_deny_table, request))
135 return (NO);
136 return (YES);
137}
138
139/* table_match - match table entries with (daemon, client) pair */
140
141static int table_match(table, request)
142char *table;
143struct request_info *request;
144{
145 FILE *fp;
146 char sv_list[BUFLEN]; /* becomes list of daemons */
147 char *cl_list; /* becomes list of clients */
148 char *sh_cmd; /* becomes optional shell command */
149 int match = NO;
150 struct tcpd_context saved_context;
151
152 saved_context = tcpd_context; /* stupid compilers */
153
154 /*
155 * Between the fopen() and fclose() calls, avoid jumps that may cause
156 * file descriptor leaks.
157 */
158
159 if ((fp = fopen(table, "r")) != 0) {
160 tcpd_context.file = table;
161 tcpd_context.line = 0;
162 while (match == NO && xgets(sv_list, sizeof(sv_list), fp) != 0) {
163 if (sv_list[strlen(sv_list) - 1] != '\n') {
164 tcpd_warn("missing newline or line too long");
165 continue;
166 }
167 if (sv_list[0] == '#' || sv_list[strspn(sv_list, " \t\r\n")] == 0)
168 continue;
169 if ((cl_list = split_at(sv_list, ':')) == 0) {
170 tcpd_warn("missing \":\" separator");
171 continue;
172 }
173 sh_cmd = split_at(cl_list, ':');
174 match = list_match(sv_list, request, server_match)
175 && list_match(cl_list, request, client_match);
176 }
177 (void) fclose(fp);
178 } else if (errno != ENOENT) {
179 tcpd_warn("cannot open %s: %m", table);
180 }
181 if (match) {
182 if (hosts_access_verbose > 1)
183 syslog(LOG_DEBUG, "matched: %s line %d",
184 tcpd_context.file, tcpd_context.line);
185 if (sh_cmd) {
186#ifdef PROCESS_OPTIONS
187 process_options(sh_cmd, request);
188#else
189 char cmd[BUFSIZ];
190 shell_cmd(percent_x(cmd, sizeof(cmd), sh_cmd, request));
191#endif
192 }
193 }
194 tcpd_context = saved_context;
195 return (match);
196}
197
198/* list_match - match a request against a list of patterns with exceptions */
199
200static int list_match(list, request, match_fn)
201char *list;
202struct request_info *request;
203int (*match_fn) ();
204{
205 char *tok;
206
207 /*
208 * Process tokens one at a time. We have exhausted all possible matches
209 * when we reach an "EXCEPT" token or the end of the list. If we do find
210 * a match, look for an "EXCEPT" list and recurse to determine whether
211 * the match is affected by any exceptions.
212 */
213
214 for (tok = strtok(list, sep); tok != 0; tok = strtok((char *) 0, sep)) {
215 if (STR_EQ(tok, "EXCEPT")) /* EXCEPT: give up */
216 return (NO);
217 if (match_fn(tok, request)) { /* YES: look for exceptions */
218 while ((tok = strtok((char *) 0, sep)) && STR_NE(tok, "EXCEPT"))
219 /* VOID */ ;
220 return (tok == 0 || list_match((char *) 0, request, match_fn) == 0);
221 }
222 }
223 return (NO);
224}
225
226/* server_match - match server information */
227
228static int server_match(tok, request)
229char *tok;
230struct request_info *request;
231{
232 char *host;
233
234 if ((host = split_at(tok + 1, '@')) == 0) { /* plain daemon */
235 return (string_match(tok, eval_daemon(request)));
236 } else { /* daemon@host */
237 return (string_match(tok, eval_daemon(request))
238 && host_match(host, request->server));
239 }
240}
241
242/* client_match - match client information */
243
244static int client_match(tok, request)
245char *tok;
246struct request_info *request;
247{
248 char *host;
249
250 if ((host = split_at(tok + 1, '@')) == 0) { /* plain host */
251 return (host_match(tok, request->client));
252 } else { /* user@host */
253 return (host_match(host, request->client)
254 && string_match(tok, eval_user(request)));
255 }
256}
257
258/* hostfile_match - look up host patterns from file */
259
260static int hostfile_match(path, host)
261char *path;
262struct hosts_info *host;
263{
264 char tok[BUFSIZ];
265 int match = NO;
266 FILE *fp;
267
268 if ((fp = fopen(path, "r")) != 0) {
269 while (fscanf(fp, "%s", tok) == 1 && !(match = host_match(tok, host)))
270 /* void */ ;
271 fclose(fp);
272 } else if (errno != ENOENT) {
273 tcpd_warn("open %s: %m", path);
274 }
275 return (match);
276}
277
278/* host_match - match host name and/or address against pattern */
279
280static int host_match(tok, host)
281char *tok;
282struct host_info *host;
283{
284 char *mask;
285
286 /*
287 * This code looks a little hairy because we want to avoid unnecessary
288 * hostname lookups.
289 *
290 * The KNOWN pattern requires that both address AND name be known; some
291 * patterns are specific to host names or to host addresses; all other
292 * patterns are satisfied when either the address OR the name match.
293 */
294
295 if (tok[0] == '@') { /* netgroup: look it up */
296#ifdef NETGROUP
297 static char *mydomain = 0;
298 if (mydomain == 0)
299 yp_get_default_domain(&mydomain);
300 return (innetgr(tok + 1, eval_hostname(host), (char *) 0, mydomain));
301#else
302 tcpd_warn("netgroup support is disabled"); /* not tcpd_jump() */
303 return (NO);
304#endif
305 } else if (tok[0] == '/') { /* /file hack */
306 return (hostfile_match(tok, host));
307 } else if (STR_EQ(tok, "KNOWN")) { /* check address and name */
308 char *name = eval_hostname(host);
309 return (STR_NE(eval_hostaddr(host), unknown) && HOSTNAME_KNOWN(name));
310 } else if (STR_EQ(tok, "LOCAL")) { /* local: no dots in name */
311 char *name = eval_hostname(host);
312 return (strchr(name, '.') == 0 && HOSTNAME_KNOWN(name));
313 } else if ((mask = split_at(tok, '/')) != 0) { /* net/mask */
314 return (masked_match(tok, mask, eval_hostaddr(host)));
315 } else { /* anything else */
316 return (string_match(tok, eval_hostaddr(host))
317 || (NOT_INADDR(tok) && string_match(tok, eval_hostname(host))));
318 }
319}
320
321/* string_match - match string against pattern */
322
323static int string_match(tok, string)
324char *tok;
325char *string;
326{
327 int n;
328
329#ifdef INET6
330 /* convert IPv4 mapped IPv6 address to IPv4 address */
331 if (STRN_EQ(string, "::ffff:", 7)
332 && dot_quad_addr(string + 7) != INADDR_NONE) {
333 string += 7;
334 }
335#endif
336 if (tok[0] == '.') { /* suffix */
337 n = strlen(string) - strlen(tok);
338 return (n > 0 && STR_EQ(tok, string + n));
339 } else if (STR_EQ(tok, "ALL")) { /* all: match any */
340 return (YES);
341 } else if (STR_EQ(tok, "KNOWN")) { /* not unknown */
342 return (STR_NE(string, unknown));
343 } else if (tok[(n = strlen(tok)) - 1] == '.') { /* prefix */
344 return (STRN_EQ(tok, string, n));
345 } else { /* exact match */
346#ifdef INET6
347 struct addrinfo hints, *res;
348 struct sockaddr_in6 pat, addr;
349 int len, ret;
350 char ch;
351
352 len = strlen(tok);
353 if (*tok == '[' && tok[len - 1] == ']') {
354 ch = tok[len - 1];
355 tok[len - 1] = '\0';
356 memset(&hints, 0, sizeof(hints));
357 hints.ai_family = AF_INET6;
358 hints.ai_socktype = SOCK_STREAM;
359 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
360 if ((ret = getaddrinfo(tok + 1, NULL, &hints, &res)) == 0) {
361 memcpy(&pat, res->ai_addr, sizeof(pat));
362 freeaddrinfo(res);
363 }
364 tok[len - 1] = ch;
365 if (ret != 0 || getaddrinfo(string, NULL, &hints, &res) != 0)
366 return NO;
367 memcpy(&addr, res->ai_addr, sizeof(addr));
368 freeaddrinfo(res);
| 20 */
21
22#ifndef lint
23static char sccsid[] = "@(#) hosts_access.c 1.21 97/02/12 02:13:22";
24#endif
25
26/* System libraries. */
27
28#include <sys/types.h>
29#ifdef INT32_T
30 typedef uint32_t u_int32_t;
31#endif
32#include <sys/param.h>
33#ifdef INET6
34#include <sys/socket.h>
35#endif
36#include <netinet/in.h>
37#include <arpa/inet.h>
38#include <stdio.h>
39#include <syslog.h>
40#include <ctype.h>
41#include <errno.h>
42#include <setjmp.h>
43#include <string.h>
44#ifdef INET6
45#include <netdb.h>
46#endif
47
48extern char *fgets();
49extern int errno;
50
51#ifndef INADDR_NONE
52#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
53#endif
54
55/* Local stuff. */
56
57#include "tcpd.h"
58
59/* Error handling. */
60
61extern jmp_buf tcpd_buf;
62
63/* Delimiters for lists of daemons or clients. */
64
65static char sep[] = ", \t\r\n";
66
67/* Constants to be used in assignments only, not in comparisons... */
68
69#define YES 1
70#define NO 0
71
72 /*
73 * These variables are globally visible so that they can be redirected in
74 * verification mode.
75 */
76
77char *hosts_allow_table = HOSTS_ALLOW;
78char *hosts_deny_table = HOSTS_DENY;
79int hosts_access_verbose = 0;
80
81 /*
82 * In a long-running process, we are not at liberty to just go away.
83 */
84
85int resident = (-1); /* -1, 0: unknown; +1: yes */
86
87/* Forward declarations. */
88
89static int table_match();
90static int list_match();
91static int server_match();
92static int client_match();
93static int host_match();
94static int string_match();
95static int masked_match();
96#ifdef INET6
97static int masked_match4();
98static int masked_match6();
99#endif
100
101/* Size of logical line buffer. */
102
103#define BUFLEN 2048
104
105/* hosts_access - host access control facility */
106
107int hosts_access(request)
108struct request_info *request;
109{
110 int verdict;
111
112 /*
113 * If the (daemon, client) pair is matched by an entry in the file
114 * /etc/hosts.allow, access is granted. Otherwise, if the (daemon,
115 * client) pair is matched by an entry in the file /etc/hosts.deny,
116 * access is denied. Otherwise, access is granted. A non-existent
117 * access-control file is treated as an empty file.
118 *
119 * After a rule has been matched, the optional language extensions may
120 * decide to grant or refuse service anyway. Or, while a rule is being
121 * processed, a serious error is found, and it seems better to play safe
122 * and deny service. All this is done by jumping back into the
123 * hosts_access() routine, bypassing the regular return from the
124 * table_match() function calls below.
125 */
126
127 if (resident <= 0)
128 resident++;
129 verdict = setjmp(tcpd_buf);
130 if (verdict != 0)
131 return (verdict == AC_PERMIT);
132 if (table_match(hosts_allow_table, request))
133 return (YES);
134 if (table_match(hosts_deny_table, request))
135 return (NO);
136 return (YES);
137}
138
139/* table_match - match table entries with (daemon, client) pair */
140
141static int table_match(table, request)
142char *table;
143struct request_info *request;
144{
145 FILE *fp;
146 char sv_list[BUFLEN]; /* becomes list of daemons */
147 char *cl_list; /* becomes list of clients */
148 char *sh_cmd; /* becomes optional shell command */
149 int match = NO;
150 struct tcpd_context saved_context;
151
152 saved_context = tcpd_context; /* stupid compilers */
153
154 /*
155 * Between the fopen() and fclose() calls, avoid jumps that may cause
156 * file descriptor leaks.
157 */
158
159 if ((fp = fopen(table, "r")) != 0) {
160 tcpd_context.file = table;
161 tcpd_context.line = 0;
162 while (match == NO && xgets(sv_list, sizeof(sv_list), fp) != 0) {
163 if (sv_list[strlen(sv_list) - 1] != '\n') {
164 tcpd_warn("missing newline or line too long");
165 continue;
166 }
167 if (sv_list[0] == '#' || sv_list[strspn(sv_list, " \t\r\n")] == 0)
168 continue;
169 if ((cl_list = split_at(sv_list, ':')) == 0) {
170 tcpd_warn("missing \":\" separator");
171 continue;
172 }
173 sh_cmd = split_at(cl_list, ':');
174 match = list_match(sv_list, request, server_match)
175 && list_match(cl_list, request, client_match);
176 }
177 (void) fclose(fp);
178 } else if (errno != ENOENT) {
179 tcpd_warn("cannot open %s: %m", table);
180 }
181 if (match) {
182 if (hosts_access_verbose > 1)
183 syslog(LOG_DEBUG, "matched: %s line %d",
184 tcpd_context.file, tcpd_context.line);
185 if (sh_cmd) {
186#ifdef PROCESS_OPTIONS
187 process_options(sh_cmd, request);
188#else
189 char cmd[BUFSIZ];
190 shell_cmd(percent_x(cmd, sizeof(cmd), sh_cmd, request));
191#endif
192 }
193 }
194 tcpd_context = saved_context;
195 return (match);
196}
197
198/* list_match - match a request against a list of patterns with exceptions */
199
200static int list_match(list, request, match_fn)
201char *list;
202struct request_info *request;
203int (*match_fn) ();
204{
205 char *tok;
206
207 /*
208 * Process tokens one at a time. We have exhausted all possible matches
209 * when we reach an "EXCEPT" token or the end of the list. If we do find
210 * a match, look for an "EXCEPT" list and recurse to determine whether
211 * the match is affected by any exceptions.
212 */
213
214 for (tok = strtok(list, sep); tok != 0; tok = strtok((char *) 0, sep)) {
215 if (STR_EQ(tok, "EXCEPT")) /* EXCEPT: give up */
216 return (NO);
217 if (match_fn(tok, request)) { /* YES: look for exceptions */
218 while ((tok = strtok((char *) 0, sep)) && STR_NE(tok, "EXCEPT"))
219 /* VOID */ ;
220 return (tok == 0 || list_match((char *) 0, request, match_fn) == 0);
221 }
222 }
223 return (NO);
224}
225
226/* server_match - match server information */
227
228static int server_match(tok, request)
229char *tok;
230struct request_info *request;
231{
232 char *host;
233
234 if ((host = split_at(tok + 1, '@')) == 0) { /* plain daemon */
235 return (string_match(tok, eval_daemon(request)));
236 } else { /* daemon@host */
237 return (string_match(tok, eval_daemon(request))
238 && host_match(host, request->server));
239 }
240}
241
242/* client_match - match client information */
243
244static int client_match(tok, request)
245char *tok;
246struct request_info *request;
247{
248 char *host;
249
250 if ((host = split_at(tok + 1, '@')) == 0) { /* plain host */
251 return (host_match(tok, request->client));
252 } else { /* user@host */
253 return (host_match(host, request->client)
254 && string_match(tok, eval_user(request)));
255 }
256}
257
258/* hostfile_match - look up host patterns from file */
259
260static int hostfile_match(path, host)
261char *path;
262struct hosts_info *host;
263{
264 char tok[BUFSIZ];
265 int match = NO;
266 FILE *fp;
267
268 if ((fp = fopen(path, "r")) != 0) {
269 while (fscanf(fp, "%s", tok) == 1 && !(match = host_match(tok, host)))
270 /* void */ ;
271 fclose(fp);
272 } else if (errno != ENOENT) {
273 tcpd_warn("open %s: %m", path);
274 }
275 return (match);
276}
277
278/* host_match - match host name and/or address against pattern */
279
280static int host_match(tok, host)
281char *tok;
282struct host_info *host;
283{
284 char *mask;
285
286 /*
287 * This code looks a little hairy because we want to avoid unnecessary
288 * hostname lookups.
289 *
290 * The KNOWN pattern requires that both address AND name be known; some
291 * patterns are specific to host names or to host addresses; all other
292 * patterns are satisfied when either the address OR the name match.
293 */
294
295 if (tok[0] == '@') { /* netgroup: look it up */
296#ifdef NETGROUP
297 static char *mydomain = 0;
298 if (mydomain == 0)
299 yp_get_default_domain(&mydomain);
300 return (innetgr(tok + 1, eval_hostname(host), (char *) 0, mydomain));
301#else
302 tcpd_warn("netgroup support is disabled"); /* not tcpd_jump() */
303 return (NO);
304#endif
305 } else if (tok[0] == '/') { /* /file hack */
306 return (hostfile_match(tok, host));
307 } else if (STR_EQ(tok, "KNOWN")) { /* check address and name */
308 char *name = eval_hostname(host);
309 return (STR_NE(eval_hostaddr(host), unknown) && HOSTNAME_KNOWN(name));
310 } else if (STR_EQ(tok, "LOCAL")) { /* local: no dots in name */
311 char *name = eval_hostname(host);
312 return (strchr(name, '.') == 0 && HOSTNAME_KNOWN(name));
313 } else if ((mask = split_at(tok, '/')) != 0) { /* net/mask */
314 return (masked_match(tok, mask, eval_hostaddr(host)));
315 } else { /* anything else */
316 return (string_match(tok, eval_hostaddr(host))
317 || (NOT_INADDR(tok) && string_match(tok, eval_hostname(host))));
318 }
319}
320
321/* string_match - match string against pattern */
322
323static int string_match(tok, string)
324char *tok;
325char *string;
326{
327 int n;
328
329#ifdef INET6
330 /* convert IPv4 mapped IPv6 address to IPv4 address */
331 if (STRN_EQ(string, "::ffff:", 7)
332 && dot_quad_addr(string + 7) != INADDR_NONE) {
333 string += 7;
334 }
335#endif
336 if (tok[0] == '.') { /* suffix */
337 n = strlen(string) - strlen(tok);
338 return (n > 0 && STR_EQ(tok, string + n));
339 } else if (STR_EQ(tok, "ALL")) { /* all: match any */
340 return (YES);
341 } else if (STR_EQ(tok, "KNOWN")) { /* not unknown */
342 return (STR_NE(string, unknown));
343 } else if (tok[(n = strlen(tok)) - 1] == '.') { /* prefix */
344 return (STRN_EQ(tok, string, n));
345 } else { /* exact match */
346#ifdef INET6
347 struct addrinfo hints, *res;
348 struct sockaddr_in6 pat, addr;
349 int len, ret;
350 char ch;
351
352 len = strlen(tok);
353 if (*tok == '[' && tok[len - 1] == ']') {
354 ch = tok[len - 1];
355 tok[len - 1] = '\0';
356 memset(&hints, 0, sizeof(hints));
357 hints.ai_family = AF_INET6;
358 hints.ai_socktype = SOCK_STREAM;
359 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
360 if ((ret = getaddrinfo(tok + 1, NULL, &hints, &res)) == 0) {
361 memcpy(&pat, res->ai_addr, sizeof(pat));
362 freeaddrinfo(res);
363 }
364 tok[len - 1] = ch;
365 if (ret != 0 || getaddrinfo(string, NULL, &hints, &res) != 0)
366 return NO;
367 memcpy(&addr, res->ai_addr, sizeof(addr));
368 freeaddrinfo(res);
|
374 return (!memcmp(&pat.sin6_addr, &addr.sin6_addr,
375 sizeof(struct in6_addr)));
376 return (ret);
377 }
378#endif
379 return (STR_EQ(tok, string));
380 }
381}
382
383/* masked_match - match address against netnumber/netmask */
384
385#ifdef INET6
386static int masked_match(net_tok, mask_tok, string)
387char *net_tok;
388char *mask_tok;
389char *string;
390{
391 return (masked_match4(net_tok, mask_tok, string) ||
392 masked_match6(net_tok, mask_tok, string));
393}
394
395static int masked_match4(net_tok, mask_tok, string)
396#else
397static int masked_match(net_tok, mask_tok, string)
398#endif
399char *net_tok;
400char *mask_tok;
401char *string;
402{
403#ifdef INET6
404 u_int32_t net;
405 u_int32_t mask;
406 u_int32_t addr;
407#else
408 unsigned long net;
409 unsigned long mask;
410 unsigned long addr;
411#endif
412
413 /*
414 * Disallow forms other than dotted quad: the treatment that inet_addr()
415 * gives to forms with less than four components is inconsistent with the
416 * access control language. John P. Rouillard <rouilj@cs.umb.edu>.
417 */
418
419 if ((addr = dot_quad_addr(string)) == INADDR_NONE)
420 return (NO);
421 if ((net = dot_quad_addr(net_tok)) == INADDR_NONE
422 || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE) {
423#ifndef INET6
424 tcpd_warn("bad net/mask expression: %s/%s", net_tok, mask_tok);
425#endif
426 return (NO); /* not tcpd_jump() */
427 }
428 return ((addr & mask) == net);
429}
430
431#ifdef INET6
432static int masked_match6(net_tok, mask_tok, string)
433char *net_tok;
434char *mask_tok;
435char *string;
436{
437 struct addrinfo hints, *res;
438 struct sockaddr_in6 net, addr;
439 u_int32_t mask;
440 int len, mask_len, i = 0;
441 char ch;
442
443 memset(&hints, 0, sizeof(hints));
444 hints.ai_family = AF_INET6;
445 hints.ai_socktype = SOCK_STREAM;
446 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
447 if (getaddrinfo(string, NULL, &hints, &res) != 0)
448 return NO;
449 memcpy(&addr, res->ai_addr, sizeof(addr));
450 freeaddrinfo(res);
451
452 if (IN6_IS_ADDR_V4MAPPED(&addr.sin6_addr)) {
453 if ((*(u_int32_t *)&net.sin6_addr.s6_addr[12] = dot_quad_addr(net_tok)) == INADDR_NONE
454 || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE)
455 return (NO);
456 return ((*(u_int32_t *)&addr.sin6_addr.s6_addr[12] & mask) == *(u_int32_t *)&net.sin6_addr.s6_addr[12]);
457 }
458
459 /* match IPv6 address against netnumber/prefixlen */
460 len = strlen(net_tok);
461 if (*net_tok != '[' || net_tok[len - 1] != ']')
462 return NO;
463 ch = net_tok[len - 1];
464 net_tok[len - 1] = '\0';
465 if (getaddrinfo(net_tok + 1, NULL, &hints, &res) != 0) {
466 net_tok[len - 1] = ch;
467 return NO;
468 }
469 memcpy(&net, res->ai_addr, sizeof(net));
470 freeaddrinfo(res);
471 net_tok[len - 1] = ch;
472 if ((mask_len = atoi(mask_tok)) < 0 || mask_len > 128)
473 return NO;
474
| 372 return (!memcmp(&pat.sin6_addr, &addr.sin6_addr,
373 sizeof(struct in6_addr)));
374 return (ret);
375 }
376#endif
377 return (STR_EQ(tok, string));
378 }
379}
380
381/* masked_match - match address against netnumber/netmask */
382
383#ifdef INET6
384static int masked_match(net_tok, mask_tok, string)
385char *net_tok;
386char *mask_tok;
387char *string;
388{
389 return (masked_match4(net_tok, mask_tok, string) ||
390 masked_match6(net_tok, mask_tok, string));
391}
392
393static int masked_match4(net_tok, mask_tok, string)
394#else
395static int masked_match(net_tok, mask_tok, string)
396#endif
397char *net_tok;
398char *mask_tok;
399char *string;
400{
401#ifdef INET6
402 u_int32_t net;
403 u_int32_t mask;
404 u_int32_t addr;
405#else
406 unsigned long net;
407 unsigned long mask;
408 unsigned long addr;
409#endif
410
411 /*
412 * Disallow forms other than dotted quad: the treatment that inet_addr()
413 * gives to forms with less than four components is inconsistent with the
414 * access control language. John P. Rouillard <rouilj@cs.umb.edu>.
415 */
416
417 if ((addr = dot_quad_addr(string)) == INADDR_NONE)
418 return (NO);
419 if ((net = dot_quad_addr(net_tok)) == INADDR_NONE
420 || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE) {
421#ifndef INET6
422 tcpd_warn("bad net/mask expression: %s/%s", net_tok, mask_tok);
423#endif
424 return (NO); /* not tcpd_jump() */
425 }
426 return ((addr & mask) == net);
427}
428
429#ifdef INET6
430static int masked_match6(net_tok, mask_tok, string)
431char *net_tok;
432char *mask_tok;
433char *string;
434{
435 struct addrinfo hints, *res;
436 struct sockaddr_in6 net, addr;
437 u_int32_t mask;
438 int len, mask_len, i = 0;
439 char ch;
440
441 memset(&hints, 0, sizeof(hints));
442 hints.ai_family = AF_INET6;
443 hints.ai_socktype = SOCK_STREAM;
444 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
445 if (getaddrinfo(string, NULL, &hints, &res) != 0)
446 return NO;
447 memcpy(&addr, res->ai_addr, sizeof(addr));
448 freeaddrinfo(res);
449
450 if (IN6_IS_ADDR_V4MAPPED(&addr.sin6_addr)) {
451 if ((*(u_int32_t *)&net.sin6_addr.s6_addr[12] = dot_quad_addr(net_tok)) == INADDR_NONE
452 || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE)
453 return (NO);
454 return ((*(u_int32_t *)&addr.sin6_addr.s6_addr[12] & mask) == *(u_int32_t *)&net.sin6_addr.s6_addr[12]);
455 }
456
457 /* match IPv6 address against netnumber/prefixlen */
458 len = strlen(net_tok);
459 if (*net_tok != '[' || net_tok[len - 1] != ']')
460 return NO;
461 ch = net_tok[len - 1];
462 net_tok[len - 1] = '\0';
463 if (getaddrinfo(net_tok + 1, NULL, &hints, &res) != 0) {
464 net_tok[len - 1] = ch;
465 return NO;
466 }
467 memcpy(&net, res->ai_addr, sizeof(net));
468 freeaddrinfo(res);
469 net_tok[len - 1] = ch;
470 if ((mask_len = atoi(mask_tok)) < 0 || mask_len > 128)
471 return NO;
472
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