2 * Routines for testing only. Not really industrial strength.
4 * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
10 static char sccs_id[] = "@(#) scaffold.c 1.6 97/03/21 19:27:24";
13 /* System libraries. */
15 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <netinet/in.h>
19 #include <arpa/inet.h>
27 #define INADDR_NONE (-1) /* XXX should be 0xffffffff */
31 extern char *malloc();
34 /* Application-specific. */
40 * These are referenced by the options module and by rfc931.c.
42 int allow_severity = SEVERITY;
43 int deny_severity = LOG_WARNING;
44 int rfc931_timeout = RFC931_TIMEOUT;
47 /* dup_hostent - create hostent in one memory block */
49 static struct hostent *dup_hostent(hp)
52 struct hostent_block {
56 struct hostent_block *hb;
61 for (count = 0; hp->h_addr_list[count] != 0; count++)
64 if ((hb = (struct hostent_block *) malloc(sizeof(struct hostent_block)
65 + (hp->h_length + sizeof(char *)) * count)) == 0) {
66 fprintf(stderr, "Sorry, out of memory\n");
69 memset((char *) &hb->host, 0, sizeof(hb->host));
70 hb->host.h_length = hp->h_length;
71 hb->host.h_addr_list = hb->addr_list;
72 hb->host.h_addr_list[count] = 0;
73 data = (char *) (hb->host.h_addr_list + count + 1);
75 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
76 hb->host.h_addr_list[count] = data + hp->h_length * count;
77 memcpy(hb->host.h_addr_list[count], addr, hp->h_length);
83 /* find_inet_addr - find all addresses for this host, result to free() */
86 struct addrinfo *find_inet_addr(host)
89 struct addrinfo hints, *res;
91 memset(&hints, 0, sizeof(hints));
92 hints.ai_family = PF_UNSPEC;
93 hints.ai_socktype = SOCK_STREAM;
94 hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
95 if (getaddrinfo(host, NULL, &hints, &res) == 0)
98 memset(&hints, 0, sizeof(hints));
99 hints.ai_family = PF_UNSPEC;
100 hints.ai_socktype = SOCK_STREAM;
101 hints.ai_flags = AI_PASSIVE | AI_CANONNAME;
102 if (getaddrinfo(host, NULL, &hints, &res) != 0) {
103 tcpd_warn("%s: host not found", host);
106 if (res->ai_family != AF_INET6 && res->ai_family != AF_INET) {
107 tcpd_warn("%d: not an internet host", res->ai_family);
111 if (!res->ai_canonname) {
112 tcpd_warn("%s: hostname alias", host);
113 tcpd_warn("(cannot obtain official name)", res->ai_canonname);
114 } else if (STR_NE(host, res->ai_canonname)) {
115 tcpd_warn("%s: hostname alias", host);
116 tcpd_warn("(official name: %.*s)", STRING_LENGTH, res->ai_canonname);
121 struct hostent *find_inet_addr(host)
126 static struct hostent h;
127 static char *addr_list[2];
130 * Host address: translate it to internal form.
132 if ((addr.s_addr = dot_quad_addr(host)) != INADDR_NONE) {
133 h.h_addr_list = addr_list;
134 h.h_addr_list[0] = (char *) &addr;
135 h.h_length = sizeof(addr);
136 return (dup_hostent(&h));
140 * Map host name to a series of addresses. Watch out for non-internet
141 * forms or aliases. The NOT_INADDR() is here in case gethostbyname() has
142 * been "enhanced" to accept numeric addresses. Make a copy of the
143 * address list so that later gethostbyXXX() calls will not clobber it.
145 if (NOT_INADDR(host) == 0) {
146 tcpd_warn("%s: not an internet address", host);
149 if ((hp = gethostbyname(host)) == 0) {
150 tcpd_warn("%s: host not found", host);
153 if (hp->h_addrtype != AF_INET) {
154 tcpd_warn("%d: not an internet host", hp->h_addrtype);
157 if (STR_NE(host, hp->h_name)) {
158 tcpd_warn("%s: hostname alias", host);
159 tcpd_warn("(official name: %.*s)", STRING_LENGTH, hp->h_name);
161 return (dup_hostent(hp));
165 /* check_dns - give each address thorough workout, return address count */
170 struct request_info request;
172 struct sockaddr_storage sin;
173 struct addrinfo *hp, *res;
175 struct sockaddr_in sin;
181 if ((hp = find_inet_addr(host)) == 0)
183 request_init(&request, RQ_CLIENT_SIN, &sin, 0);
184 sock_methods(&request);
186 memset((char *) &sin, 0, sizeof(sin));
187 sin.sin_family = AF_INET;
191 for (res = hp, count = 0; res; res = res->ai_next, count++) {
192 memcpy(&sin, res->ai_addr, res->ai_addrlen);
194 for (count = 0; (addr = hp->h_addr_list[count]) != 0; count++) {
195 memcpy((char *) &sin.sin_addr, addr, sizeof(sin.sin_addr));
199 * Force host name and address conversions. Use the request structure
200 * as a cache. Detect hostname lookup problems. Any name/name or
201 * name/address conflicts will be reported while eval_hostname() does
204 request_set(&request, RQ_CLIENT_ADDR, "", RQ_CLIENT_NAME, "", 0);
205 if (STR_EQ(eval_hostname(request.client), unknown))
206 tcpd_warn("host address %s->name lookup failed",
207 eval_hostaddr(request.client));
217 /* dummy function to intercept the real shell_cmd() */
221 void shell_cmd(command)
224 if (hosts_access_verbose)
225 printf("command: %s", command);
228 /* dummy function to intercept the real clean_exit() */
232 void clean_exit(request)
233 struct request_info *request;
238 /* dummy function to intercept the real rfc931() */
243 struct request_info *request;
245 strcpy(request->user, unknown);
248 /* check_path - examine accessibility */
250 int check_path(path, st)
257 if (stat(path, st) < 0)
261 tcpd_warn("%s: not owned by root", path);
262 if (st->st_mode & 020)
263 tcpd_warn("%s: group writable", path);
265 if (st->st_mode & 002)
266 tcpd_warn("%s: world writable", path);
267 if (path[0] == '/' && path[1] != 0) {
268 strrchr(strcpy(buf, path), '/')[0] = 0;
269 (void) check_path(buf[0] ? buf : "/", &stbuf);