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scaffold.c (44744) scaffold.c (56977)
1 /*
2 * Routines for testing only. Not really industrial strength.
3 *
4 * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
1 /*
2 * Routines for testing only. Not really industrial strength.
3 *
4 * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
5 *
6 * $FreeBSD: head/contrib/tcp_wrappers/scaffold.c 56977 2000-02-03 10:27:03Z shin $
5 */
6
7#ifndef lint
8static char sccs_id[] = "@(#) scaffold.c 1.6 97/03/21 19:27:24";
9#endif
10
11/* System libraries. */
12
13#include <sys/types.h>
14#include <sys/stat.h>
15#include <sys/socket.h>
16#include <netinet/in.h>
17#include <arpa/inet.h>
18#include <netdb.h>
19#include <stdio.h>
20#include <syslog.h>
21#include <setjmp.h>
22#include <string.h>
7 */
8
9#ifndef lint
10static char sccs_id[] = "@(#) scaffold.c 1.6 97/03/21 19:27:24";
11#endif
12
13/* System libraries. */
14
15#include <sys/types.h>
16#include <sys/stat.h>
17#include <sys/socket.h>
18#include <netinet/in.h>
19#include <arpa/inet.h>
20#include <netdb.h>
21#include <stdio.h>
22#include <syslog.h>
23#include <setjmp.h>
24#include <string.h>
25#include <resolv.h>
23
24#ifndef INADDR_NONE
25#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
26#endif
27
28extern char *malloc();
29
30/* Application-specific. */

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52 int count;
53 char *data;
54 char *addr;
55
56 for (count = 0; hp->h_addr_list[count] != 0; count++)
57 /* void */ ;
58
59 if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
26
27#ifndef INADDR_NONE
28#define INADDR_NONE (-1) /* XXX should be 0xffffffff */
29#endif
30
31extern char *malloc();
32
33/* Application-specific. */

--- 21 unchanged lines hidden (view full) ---

55 int count;
56 char *data;
57 char *addr;
58
59 for (count = 0; hp->h_addr_list[count] != 0; count++)
60 /* void */ ;
61
62 if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
63#ifdef INET6
64 + strlen(hp->h_name) + 1
65#endif
60 + (hp->h_length + sizeof(char *)) * count)) == 0) {
61 fprintf(stderr, "Sorry, out of memory\n");
62 exit(1);
63 }
64 memset((char *) &hb->host, 0, sizeof(hb->host));
65 hb->host.h_length = hp->h_length;
66 hb->host.h_addr_list = hb->addr_list;
67 hb->host.h_addr_list[count] = 0;
68 data = (char *) (hb->host.h_addr_list + count + 1);
66 + (hp->h_length + sizeof(char *)) * count)) == 0) {
67 fprintf(stderr, "Sorry, out of memory\n");
68 exit(1);
69 }
70 memset((char *) &hb->host, 0, sizeof(hb->host));
71 hb->host.h_length = hp->h_length;
72 hb->host.h_addr_list = hb->addr_list;
73 hb->host.h_addr_list[count] = 0;
74 data = (char *) (hb->host.h_addr_list + count + 1);
75#ifdef INET6
76 hb->host.h_name = data + hp->h_length * count;
77 strcpy(hb->host.h_name, hp->h_name);
78 hb->host.h_addrtype = hp->h_addrtype;
79#endif
69
70 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
71 hb->host.h_addr_list[count] = data + hp->h_length * count;
72 memcpy(hb->host.h_addr_list[count], addr, hp->h_length);
73 }
74 return (&hb->host);
75}
76
80
81 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
82 hb->host.h_addr_list[count] = data + hp->h_length * count;
83 memcpy(hb->host.h_addr_list[count], addr, hp->h_length);
84 }
85 return (&hb->host);
86}
87
88#if defined(INET6) && !defined(USE_GETIPNODEBY)
89/* merge_hostent - merge hostent in one memory block */
90
91static struct hostent *merge_hostent(hp1, hp2)
92struct hostent *hp1, *hp2;
93{
94 struct hostent_block {
95 struct hostent host;
96 char *addr_list[1];
97 };
98 struct hostent_block *hb;
99 int count, count2;
100 char *data;
101 char *addr;
102
103 for (count = 0; hp1->h_addr_list[count] != 0; count++)
104 /* void */ ;
105 for (count2 = 0; hp2->h_addr_list[count2] != 0; count2++)
106 /* void */ ;
107 count += count2;
108
109 if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
110 + strlen(hp1->h_name) + 1
111 + (hp1->h_length + sizeof(char *)) * count)) == 0) {
112 fprintf(stderr, "Sorry, out of memory\n");
113 exit(1);
114 }
115 memset((char *) &hb->host, 0, sizeof(hb->host));
116 hb->host.h_length = hp1->h_length;
117 hb->host.h_addr_list = hb->addr_list;
118 hb->host.h_addr_list[count] = 0;
119 data = (char *) (hb->host.h_addr_list + count + 1);
120 hb->host.h_name = data + hp1->h_length * count;
121 strcpy(hb->host.h_name, hp1->h_name);
122 hb->host.h_addrtype = hp1->h_addrtype;
123
124 for (count = 0; (addr = hp1->h_addr_list[count]) != 0; count++) {
125 hb->host.h_addr_list[count] = data + hp1->h_length * count;
126 memcpy(hb->host.h_addr_list[count], addr, hp1->h_length);
127 }
128 for (count2 = 0; (addr = hp2->h_addr_list[count2]) != 0; count2++) {
129 hb->host.h_addr_list[count] = data + hp1->h_length * count;
130 memcpy(hb->host.h_addr_list[count], addr, hp1->h_length);
131 ++count;
132 }
133 return (&hb->host);
134}
135#endif
136
137static struct hostent *gethostbyname64(host)
138char *host;
139{
140 struct hostent *hp = NULL, *hp2 = NULL;
141#ifdef USE_GETIPNODEBY
142 int h_error;
143
144 if ((hp = getipnodebyname(host, AF_INET6,
145 AI_V4MAPPED | AI_ADDRCONFIG | AI_ALL,
146 &h_error)) != 0) {
147 hp2 = dup_hostent(hp);
148 freehostent(hp);
149 return (hp2);
150 }
151#else
152 struct hostent *hp1;
153 u_long res_options;
154
155 if ((_res.options & RES_INIT) == 0) {
156 if (res_init() < 0) {
157 tcpd_warn("%s: res_init() failed", host);
158 return (NULL);
159 }
160 }
161 res_options = _res.options;
162#ifdef INET6
163 _res.options |= RES_USE_INET6;
164 if ((hp1 = gethostbyname2(host, AF_INET6)) != NULL)
165 hp1 = dup_hostent(hp1);
166#endif
167 if ((hp2 = gethostbyname2(host, AF_INET)) != NULL)
168 hp2 = dup_hostent(hp2);
169 _res.options = res_options;
170#ifdef INET6
171 if (hp1 && hp2) {
172 hp = merge_hostent(hp1, hp2);
173 free((char *) hp1);
174 free((char *) hp2);
175 return (hp);
176 }
177 if (hp1)
178 return (hp1);
179#endif
180 if (hp2)
181 return (hp2);
182#endif
183 return (NULL);
184}
185
77/* find_inet_addr - find all addresses for this host, result to free() */
78
79struct hostent *find_inet_addr(host)
80char *host;
81{
82 struct in_addr addr;
83 struct hostent *hp;
84 static struct hostent h;
85 static char *addr_list[2];
186/* find_inet_addr - find all addresses for this host, result to free() */
187
188struct hostent *find_inet_addr(host)
189char *host;
190{
191 struct in_addr addr;
192 struct hostent *hp;
193 static struct hostent h;
194 static char *addr_list[2];
195 static char hnamebuf[BUFSIZ];
86
87 /*
88 * Host address: translate it to internal form.
89 */
90 if ((addr.s_addr = dot_quad_addr(host)) != INADDR_NONE) {
91 h.h_addr_list = addr_list;
92 h.h_addr_list[0] = (char *) &addr;
93 h.h_length = sizeof(addr);
196
197 /*
198 * Host address: translate it to internal form.
199 */
200 if ((addr.s_addr = dot_quad_addr(host)) != INADDR_NONE) {
201 h.h_addr_list = addr_list;
202 h.h_addr_list[0] = (char *) &addr;
203 h.h_length = sizeof(addr);
204#ifdef INET6
205 h.h_addrtype = AF_INET;
206 h.h_name = hnamebuf;
207 strcpy(h.h_name, host);
208#endif
94 return (dup_hostent(&h));
95 }
96
97 /*
98 * Map host name to a series of addresses. Watch out for non-internet
99 * forms or aliases. The NOT_INADDR() is here in case gethostbyname() has
100 * been "enhanced" to accept numeric addresses. Make a copy of the
101 * address list so that later gethostbyXXX() calls will not clobber it.
102 */
103 if (NOT_INADDR(host) == 0) {
104 tcpd_warn("%s: not an internet address", host);
105 return (0);
106 }
209 return (dup_hostent(&h));
210 }
211
212 /*
213 * Map host name to a series of addresses. Watch out for non-internet
214 * forms or aliases. The NOT_INADDR() is here in case gethostbyname() has
215 * been "enhanced" to accept numeric addresses. Make a copy of the
216 * address list so that later gethostbyXXX() calls will not clobber it.
217 */
218 if (NOT_INADDR(host) == 0) {
219 tcpd_warn("%s: not an internet address", host);
220 return (0);
221 }
222#ifdef INET6
223 if ((hp = gethostbyname64(host)) == 0) {
224#else
107 if ((hp = gethostbyname(host)) == 0) {
225 if ((hp = gethostbyname(host)) == 0) {
226#endif
108 tcpd_warn("%s: host not found", host);
109 return (0);
110 }
227 tcpd_warn("%s: host not found", host);
228 return (0);
229 }
230#ifdef INET6
231 if (hp->h_addrtype != AF_INET6) {
232 tcpd_warn("%d: not an internet host", hp->h_addrtype);
233 free((char *) hp);
234#else
111 if (hp->h_addrtype != AF_INET) {
112 tcpd_warn("%d: not an internet host", hp->h_addrtype);
235 if (hp->h_addrtype != AF_INET) {
236 tcpd_warn("%d: not an internet host", hp->h_addrtype);
237#endif
113 return (0);
114 }
115 if (STR_NE(host, hp->h_name)) {
116 tcpd_warn("%s: hostname alias", host);
117 tcpd_warn("(official name: %.*s)", STRING_LENGTH, hp->h_name);
118 }
238 return (0);
239 }
240 if (STR_NE(host, hp->h_name)) {
241 tcpd_warn("%s: hostname alias", host);
242 tcpd_warn("(official name: %.*s)", STRING_LENGTH, hp->h_name);
243 }
244#ifdef INET6
245 return (hp);
246#else
119 return (dup_hostent(hp));
247 return (dup_hostent(hp));
248#endif
120}
121
122/* check_dns - give each address thorough workout, return address count */
123
124int check_dns(host)
125char *host;
126{
127 struct request_info request;
249}
250
251/* check_dns - give each address thorough workout, return address count */
252
253int check_dns(host)
254char *host;
255{
256 struct request_info request;
257#ifdef INET6
258 struct sockaddr_storage sin;
259 char *ap;
260 int alen;
261#else
128 struct sockaddr_in sin;
262 struct sockaddr_in sin;
263#endif
129 struct hostent *hp;
130 int count;
131 char *addr;
132
133 if ((hp = find_inet_addr(host)) == 0)
134 return (0);
135 request_init(&request, RQ_CLIENT_SIN, &sin, 0);
136 sock_methods(&request);
137 memset((char *) &sin, 0, sizeof(sin));
264 struct hostent *hp;
265 int count;
266 char *addr;
267
268 if ((hp = find_inet_addr(host)) == 0)
269 return (0);
270 request_init(&request, RQ_CLIENT_SIN, &sin, 0);
271 sock_methods(&request);
272 memset((char *) &sin, 0, sizeof(sin));
273#ifdef INET6
274 sin.ss_family = hp->h_addrtype;
275 switch (hp->h_addrtype) {
276 case AF_INET:
277 ap = (char *)&((struct sockaddr_in *)&sin)->sin_addr;
278 alen = sizeof(struct sockaddr_in);
279 break;
280 case AF_INET6:
281 ap = (char *)&((struct sockaddr_in6 *)&sin)->sin6_addr;
282 alen = sizeof(struct sockaddr_in6);
283 break;
284 default:
285 return (0);
286 }
287#else
138 sin.sin_family = AF_INET;
288 sin.sin_family = AF_INET;
289#endif
139
140 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
290
291 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
292#ifdef INET6
293 memcpy(ap, addr, alen);
294#else
141 memcpy((char *) &sin.sin_addr, addr, sizeof(sin.sin_addr));
295 memcpy((char *) &sin.sin_addr, addr, sizeof(sin.sin_addr));
296#endif
142
143 /*
144 * Force host name and address conversions. Use the request structure
145 * as a cache. Detect hostname lookup problems. Any name/name or
146 * name/address conflicts will be reported while eval_hostname() does
147 * its job.
148 */
149 request_set(&request, RQ_CLIENT_ADDR, "", RQ_CLIENT_NAME, "", 0);

--- 64 unchanged lines hidden --- 		297
298 /*
299 * Force host name and address conversions. Use the request structure
300 * as a cache. Detect hostname lookup problems. Any name/name or
301 * name/address conflicts will be reported while eval_hostname() does
302 * its job.
303 */
304 request_set(&request, RQ_CLIENT_ADDR, "", RQ_CLIENT_NAME, "", 0);

--- 64 unchanged lines hidden ---