xref: /illumos-gate/usr/src/cmd/tcpd/tcpdchk.c (revision 7c478bd9)
1*7c478bd9Sstevel@tonic-gate  /*
2*7c478bd9Sstevel@tonic-gate   * tcpdchk - examine all tcpd access control rules and inetd.conf entries
3*7c478bd9Sstevel@tonic-gate   *
4*7c478bd9Sstevel@tonic-gate   * Usage: tcpdchk [-a] [-d] [-i inet_conf] [-v]
5*7c478bd9Sstevel@tonic-gate   *
6*7c478bd9Sstevel@tonic-gate   * -a: complain about implicit "allow" at end of rule.
7*7c478bd9Sstevel@tonic-gate   *
8*7c478bd9Sstevel@tonic-gate   * -d: rules in current directory.
9*7c478bd9Sstevel@tonic-gate   *
10*7c478bd9Sstevel@tonic-gate   * -i: location of inetd.conf file.
11*7c478bd9Sstevel@tonic-gate   *
12*7c478bd9Sstevel@tonic-gate   * -v: show all rules.
13*7c478bd9Sstevel@tonic-gate   *
14*7c478bd9Sstevel@tonic-gate   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
15*7c478bd9Sstevel@tonic-gate   */
16*7c478bd9Sstevel@tonic-gate 
17*7c478bd9Sstevel@tonic-gate #ifndef lint
18*7c478bd9Sstevel@tonic-gate static char sccsid[] = "@(#) tcpdchk.c 1.8 97/02/12 02:13:25";
19*7c478bd9Sstevel@tonic-gate #endif
20*7c478bd9Sstevel@tonic-gate 
21*7c478bd9Sstevel@tonic-gate /* System libraries. */
22*7c478bd9Sstevel@tonic-gate 
23*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
24*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
25*7c478bd9Sstevel@tonic-gate #include <netinet/in.h>
26*7c478bd9Sstevel@tonic-gate #include <arpa/inet.h>
27*7c478bd9Sstevel@tonic-gate #include <stdio.h>
28*7c478bd9Sstevel@tonic-gate #include <syslog.h>
29*7c478bd9Sstevel@tonic-gate #include <setjmp.h>
30*7c478bd9Sstevel@tonic-gate #include <errno.h>
31*7c478bd9Sstevel@tonic-gate #include <netdb.h>
32*7c478bd9Sstevel@tonic-gate #include <string.h>
33*7c478bd9Sstevel@tonic-gate 
34*7c478bd9Sstevel@tonic-gate extern int errno;
35*7c478bd9Sstevel@tonic-gate extern void exit();
36*7c478bd9Sstevel@tonic-gate extern int optind;
37*7c478bd9Sstevel@tonic-gate extern char *optarg;
38*7c478bd9Sstevel@tonic-gate 
39*7c478bd9Sstevel@tonic-gate #ifndef INADDR_NONE
40*7c478bd9Sstevel@tonic-gate #define INADDR_NONE     (-1)		/* XXX should be 0xffffffff */
41*7c478bd9Sstevel@tonic-gate #endif
42*7c478bd9Sstevel@tonic-gate 
43*7c478bd9Sstevel@tonic-gate #ifndef S_ISDIR
44*7c478bd9Sstevel@tonic-gate #define S_ISDIR(m)	(((m) & S_IFMT) == S_IFDIR)
45*7c478bd9Sstevel@tonic-gate #endif
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate /* Application-specific. */
48*7c478bd9Sstevel@tonic-gate 
49*7c478bd9Sstevel@tonic-gate #include "tcpd.h"
50*7c478bd9Sstevel@tonic-gate #include "inetcf.h"
51*7c478bd9Sstevel@tonic-gate #include "scaffold.h"
52*7c478bd9Sstevel@tonic-gate 
53*7c478bd9Sstevel@tonic-gate  /*
54*7c478bd9Sstevel@tonic-gate   * Stolen from hosts_access.c...
55*7c478bd9Sstevel@tonic-gate   */
56*7c478bd9Sstevel@tonic-gate static char sep[] = ", \t\n";
57*7c478bd9Sstevel@tonic-gate 
58*7c478bd9Sstevel@tonic-gate #define	BUFLEN 2048
59*7c478bd9Sstevel@tonic-gate 
60*7c478bd9Sstevel@tonic-gate int     resident = 0;
61*7c478bd9Sstevel@tonic-gate int     hosts_access_verbose = 0;
62*7c478bd9Sstevel@tonic-gate char   *hosts_allow_table = HOSTS_ALLOW;
63*7c478bd9Sstevel@tonic-gate char   *hosts_deny_table = HOSTS_DENY;
64*7c478bd9Sstevel@tonic-gate extern jmp_buf tcpd_buf;
65*7c478bd9Sstevel@tonic-gate 
66*7c478bd9Sstevel@tonic-gate  /*
67*7c478bd9Sstevel@tonic-gate   * Local stuff.
68*7c478bd9Sstevel@tonic-gate   */
69*7c478bd9Sstevel@tonic-gate static void usage();
70*7c478bd9Sstevel@tonic-gate static void parse_table();
71*7c478bd9Sstevel@tonic-gate static void print_list();
72*7c478bd9Sstevel@tonic-gate static void check_daemon_list();
73*7c478bd9Sstevel@tonic-gate static void check_client_list();
74*7c478bd9Sstevel@tonic-gate static void check_daemon();
75*7c478bd9Sstevel@tonic-gate static void check_user();
76*7c478bd9Sstevel@tonic-gate static int check_host();
77*7c478bd9Sstevel@tonic-gate static int reserved_name();
78*7c478bd9Sstevel@tonic-gate 
79*7c478bd9Sstevel@tonic-gate #define PERMIT	1
80*7c478bd9Sstevel@tonic-gate #define DENY	0
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate #define YES	1
83*7c478bd9Sstevel@tonic-gate #define	NO	0
84*7c478bd9Sstevel@tonic-gate 
85*7c478bd9Sstevel@tonic-gate static int defl_verdict;
86*7c478bd9Sstevel@tonic-gate static char *myname;
87*7c478bd9Sstevel@tonic-gate static int allow_check;
88*7c478bd9Sstevel@tonic-gate static char *inetcf;
89*7c478bd9Sstevel@tonic-gate 
main(argc,argv)90*7c478bd9Sstevel@tonic-gate int     main(argc, argv)
91*7c478bd9Sstevel@tonic-gate int     argc;
92*7c478bd9Sstevel@tonic-gate char  **argv;
93*7c478bd9Sstevel@tonic-gate {
94*7c478bd9Sstevel@tonic-gate     struct request_info request;
95*7c478bd9Sstevel@tonic-gate     struct stat st;
96*7c478bd9Sstevel@tonic-gate     int     c;
97*7c478bd9Sstevel@tonic-gate 
98*7c478bd9Sstevel@tonic-gate     myname = argv[0];
99*7c478bd9Sstevel@tonic-gate 
100*7c478bd9Sstevel@tonic-gate     /*
101*7c478bd9Sstevel@tonic-gate      * Parse the JCL.
102*7c478bd9Sstevel@tonic-gate      */
103*7c478bd9Sstevel@tonic-gate     while ((c = getopt(argc, argv, "adi:v")) != EOF) {
104*7c478bd9Sstevel@tonic-gate 	switch (c) {
105*7c478bd9Sstevel@tonic-gate 	case 'a':
106*7c478bd9Sstevel@tonic-gate 	    allow_check = 1;
107*7c478bd9Sstevel@tonic-gate 	    break;
108*7c478bd9Sstevel@tonic-gate 	case 'd':
109*7c478bd9Sstevel@tonic-gate 	    hosts_allow_table = "hosts.allow";
110*7c478bd9Sstevel@tonic-gate 	    hosts_deny_table = "hosts.deny";
111*7c478bd9Sstevel@tonic-gate 	    break;
112*7c478bd9Sstevel@tonic-gate 	case 'i':
113*7c478bd9Sstevel@tonic-gate 	    inetcf = optarg;
114*7c478bd9Sstevel@tonic-gate 	    break;
115*7c478bd9Sstevel@tonic-gate 	case 'v':
116*7c478bd9Sstevel@tonic-gate 	    hosts_access_verbose++;
117*7c478bd9Sstevel@tonic-gate 	    break;
118*7c478bd9Sstevel@tonic-gate 	default:
119*7c478bd9Sstevel@tonic-gate 	    usage();
120*7c478bd9Sstevel@tonic-gate 	    /* NOTREACHED */
121*7c478bd9Sstevel@tonic-gate 	}
122*7c478bd9Sstevel@tonic-gate     }
123*7c478bd9Sstevel@tonic-gate     if (argc != optind)
124*7c478bd9Sstevel@tonic-gate 	usage();
125*7c478bd9Sstevel@tonic-gate 
126*7c478bd9Sstevel@tonic-gate     /*
127*7c478bd9Sstevel@tonic-gate      * When confusion really strikes...
128*7c478bd9Sstevel@tonic-gate      */
129*7c478bd9Sstevel@tonic-gate     if (check_path(REAL_DAEMON_DIR, &st) < 0) {
130*7c478bd9Sstevel@tonic-gate 	tcpd_warn("REAL_DAEMON_DIR %s: %m", REAL_DAEMON_DIR);
131*7c478bd9Sstevel@tonic-gate     } else if (!S_ISDIR(st.st_mode)) {
132*7c478bd9Sstevel@tonic-gate 	tcpd_warn("REAL_DAEMON_DIR %s is not a directory", REAL_DAEMON_DIR);
133*7c478bd9Sstevel@tonic-gate     }
134*7c478bd9Sstevel@tonic-gate 
135*7c478bd9Sstevel@tonic-gate     /*
136*7c478bd9Sstevel@tonic-gate      * Process the inet configuration file (or its moral equivalent). This
137*7c478bd9Sstevel@tonic-gate      * information is used later to find references in hosts.allow/deny to
138*7c478bd9Sstevel@tonic-gate      * unwrapped services, and other possible problems.
139*7c478bd9Sstevel@tonic-gate      */
140*7c478bd9Sstevel@tonic-gate     inetcf = inet_cfg(inetcf);
141*7c478bd9Sstevel@tonic-gate     if (hosts_access_verbose)
142*7c478bd9Sstevel@tonic-gate 	printf("Using network configuration file: %s\n", inetcf);
143*7c478bd9Sstevel@tonic-gate 
144*7c478bd9Sstevel@tonic-gate     /*
145*7c478bd9Sstevel@tonic-gate      * These are not run from inetd but may have built-in access control.
146*7c478bd9Sstevel@tonic-gate      */
147*7c478bd9Sstevel@tonic-gate     inet_set("portmap", WR_NOT);
148*7c478bd9Sstevel@tonic-gate     inet_set("rpcbind", WR_NOT);
149*7c478bd9Sstevel@tonic-gate 
150*7c478bd9Sstevel@tonic-gate     /*
151*7c478bd9Sstevel@tonic-gate      * Check accessibility of access control files.
152*7c478bd9Sstevel@tonic-gate      */
153*7c478bd9Sstevel@tonic-gate     (void) check_path(hosts_allow_table, &st);
154*7c478bd9Sstevel@tonic-gate     (void) check_path(hosts_deny_table, &st);
155*7c478bd9Sstevel@tonic-gate 
156*7c478bd9Sstevel@tonic-gate     /*
157*7c478bd9Sstevel@tonic-gate      * Fake up an arbitrary service request.
158*7c478bd9Sstevel@tonic-gate      */
159*7c478bd9Sstevel@tonic-gate     request_init(&request,
160*7c478bd9Sstevel@tonic-gate 		 RQ_DAEMON, "daemon_name",
161*7c478bd9Sstevel@tonic-gate 		 RQ_SERVER_NAME, "server_hostname",
162*7c478bd9Sstevel@tonic-gate 		 RQ_SERVER_ADDR, "server_addr",
163*7c478bd9Sstevel@tonic-gate 		 RQ_USER, "user_name",
164*7c478bd9Sstevel@tonic-gate 		 RQ_CLIENT_NAME, "client_hostname",
165*7c478bd9Sstevel@tonic-gate 		 RQ_CLIENT_ADDR, "client_addr",
166*7c478bd9Sstevel@tonic-gate 		 RQ_FILE, 1,
167*7c478bd9Sstevel@tonic-gate 		 0);
168*7c478bd9Sstevel@tonic-gate 
169*7c478bd9Sstevel@tonic-gate     /*
170*7c478bd9Sstevel@tonic-gate      * Examine all access-control rules.
171*7c478bd9Sstevel@tonic-gate      */
172*7c478bd9Sstevel@tonic-gate     defl_verdict = PERMIT;
173*7c478bd9Sstevel@tonic-gate     parse_table(hosts_allow_table, &request);
174*7c478bd9Sstevel@tonic-gate     defl_verdict = DENY;
175*7c478bd9Sstevel@tonic-gate     parse_table(hosts_deny_table, &request);
176*7c478bd9Sstevel@tonic-gate     return (0);
177*7c478bd9Sstevel@tonic-gate }
178*7c478bd9Sstevel@tonic-gate 
179*7c478bd9Sstevel@tonic-gate /* usage - explain */
180*7c478bd9Sstevel@tonic-gate 
usage()181*7c478bd9Sstevel@tonic-gate static void usage()
182*7c478bd9Sstevel@tonic-gate {
183*7c478bd9Sstevel@tonic-gate     fprintf(stderr, "usage: %s [-a] [-d] [-i inet_conf] [-v]\n", myname);
184*7c478bd9Sstevel@tonic-gate     fprintf(stderr, "	-a: report rules with implicit \"ALLOW\" at end\n");
185*7c478bd9Sstevel@tonic-gate     fprintf(stderr, "	-d: use allow/deny files in current directory\n");
186*7c478bd9Sstevel@tonic-gate     fprintf(stderr, "	-i: location of inetd.conf file\n");
187*7c478bd9Sstevel@tonic-gate     fprintf(stderr, "	-v: list all rules\n");
188*7c478bd9Sstevel@tonic-gate     exit(1);
189*7c478bd9Sstevel@tonic-gate }
190*7c478bd9Sstevel@tonic-gate 
191*7c478bd9Sstevel@tonic-gate /* parse_table - like table_match(), but examines _all_ entries */
192*7c478bd9Sstevel@tonic-gate 
parse_table(table,request)193*7c478bd9Sstevel@tonic-gate static void parse_table(table, request)
194*7c478bd9Sstevel@tonic-gate char   *table;
195*7c478bd9Sstevel@tonic-gate struct request_info *request;
196*7c478bd9Sstevel@tonic-gate {
197*7c478bd9Sstevel@tonic-gate     FILE   *fp;
198*7c478bd9Sstevel@tonic-gate     int     real_verdict;
199*7c478bd9Sstevel@tonic-gate     char    sv_list[BUFLEN];		/* becomes list of daemons */
200*7c478bd9Sstevel@tonic-gate     char   *cl_list;			/* becomes list of requests */
201*7c478bd9Sstevel@tonic-gate     char   *sh_cmd;			/* becomes optional shell command */
202*7c478bd9Sstevel@tonic-gate     char    buf[BUFSIZ];
203*7c478bd9Sstevel@tonic-gate     int     verdict;
204*7c478bd9Sstevel@tonic-gate     struct tcpd_context saved_context;
205*7c478bd9Sstevel@tonic-gate 
206*7c478bd9Sstevel@tonic-gate     saved_context = tcpd_context;		/* stupid compilers */
207*7c478bd9Sstevel@tonic-gate 
208*7c478bd9Sstevel@tonic-gate     if (fp = fopen(table, "r")) {
209*7c478bd9Sstevel@tonic-gate 	tcpd_context.file = table;
210*7c478bd9Sstevel@tonic-gate 	tcpd_context.line = 0;
211*7c478bd9Sstevel@tonic-gate 	while (xgets(sv_list, sizeof(sv_list), fp)) {
212*7c478bd9Sstevel@tonic-gate 	    if (sv_list[strlen(sv_list) - 1] != '\n') {
213*7c478bd9Sstevel@tonic-gate 		tcpd_warn("missing newline or line too long");
214*7c478bd9Sstevel@tonic-gate 		continue;
215*7c478bd9Sstevel@tonic-gate 	    }
216*7c478bd9Sstevel@tonic-gate 	    if (sv_list[0] == '#' || sv_list[strspn(sv_list, " \t\r\n")] == 0)
217*7c478bd9Sstevel@tonic-gate 		continue;
218*7c478bd9Sstevel@tonic-gate 	    if ((cl_list = split_at(skip_ipv6_addrs(sv_list), ':')) == 0) {
219*7c478bd9Sstevel@tonic-gate 		tcpd_warn("missing \":\" separator");
220*7c478bd9Sstevel@tonic-gate 		continue;
221*7c478bd9Sstevel@tonic-gate 	    }
222*7c478bd9Sstevel@tonic-gate 	    sh_cmd = split_at(skip_ipv6_addrs(cl_list), ':');
223*7c478bd9Sstevel@tonic-gate 
224*7c478bd9Sstevel@tonic-gate 	    if (hosts_access_verbose)
225*7c478bd9Sstevel@tonic-gate 		printf("\n>>> Rule %s line %d:\n",
226*7c478bd9Sstevel@tonic-gate 		       tcpd_context.file, tcpd_context.line);
227*7c478bd9Sstevel@tonic-gate 
228*7c478bd9Sstevel@tonic-gate 	    if (hosts_access_verbose)
229*7c478bd9Sstevel@tonic-gate 		print_list("daemons:  ", sv_list);
230*7c478bd9Sstevel@tonic-gate 	    check_daemon_list(sv_list);
231*7c478bd9Sstevel@tonic-gate 
232*7c478bd9Sstevel@tonic-gate 	    if (hosts_access_verbose)
233*7c478bd9Sstevel@tonic-gate 		print_list("clients:  ", cl_list);
234*7c478bd9Sstevel@tonic-gate 	    check_client_list(cl_list);
235*7c478bd9Sstevel@tonic-gate 
236*7c478bd9Sstevel@tonic-gate #ifdef PROCESS_OPTIONS
237*7c478bd9Sstevel@tonic-gate 	    real_verdict = defl_verdict;
238*7c478bd9Sstevel@tonic-gate 	    if (sh_cmd) {
239*7c478bd9Sstevel@tonic-gate 		verdict = setjmp(tcpd_buf);
240*7c478bd9Sstevel@tonic-gate 		if (verdict != 0) {
241*7c478bd9Sstevel@tonic-gate 		    real_verdict = (verdict == AC_PERMIT);
242*7c478bd9Sstevel@tonic-gate 		} else {
243*7c478bd9Sstevel@tonic-gate 		    dry_run = 1;
244*7c478bd9Sstevel@tonic-gate 		    process_options(sh_cmd, request);
245*7c478bd9Sstevel@tonic-gate 		    if (dry_run == 1 && real_verdict && allow_check)
246*7c478bd9Sstevel@tonic-gate 			tcpd_warn("implicit \"allow\" at end of rule");
247*7c478bd9Sstevel@tonic-gate 		}
248*7c478bd9Sstevel@tonic-gate 	    } else if (defl_verdict && allow_check) {
249*7c478bd9Sstevel@tonic-gate 		tcpd_warn("implicit \"allow\" at end of rule");
250*7c478bd9Sstevel@tonic-gate 	    }
251*7c478bd9Sstevel@tonic-gate 	    if (hosts_access_verbose)
252*7c478bd9Sstevel@tonic-gate 		printf("access:   %s\n", real_verdict ? "granted" : "denied");
253*7c478bd9Sstevel@tonic-gate #else
254*7c478bd9Sstevel@tonic-gate 	    if (sh_cmd)
255*7c478bd9Sstevel@tonic-gate 		shell_cmd(percent_x(buf, sizeof(buf), sh_cmd, request));
256*7c478bd9Sstevel@tonic-gate 	    if (hosts_access_verbose)
257*7c478bd9Sstevel@tonic-gate 		printf("access:   %s\n", defl_verdict ? "granted" : "denied");
258*7c478bd9Sstevel@tonic-gate #endif
259*7c478bd9Sstevel@tonic-gate 	}
260*7c478bd9Sstevel@tonic-gate 	(void) fclose(fp);
261*7c478bd9Sstevel@tonic-gate     } else if (errno != ENOENT) {
262*7c478bd9Sstevel@tonic-gate 	tcpd_warn("cannot open %s: %m", table);
263*7c478bd9Sstevel@tonic-gate     }
264*7c478bd9Sstevel@tonic-gate     tcpd_context = saved_context;
265*7c478bd9Sstevel@tonic-gate }
266*7c478bd9Sstevel@tonic-gate 
267*7c478bd9Sstevel@tonic-gate /* print_list - pretty-print a list */
268*7c478bd9Sstevel@tonic-gate 
print_list(title,list)269*7c478bd9Sstevel@tonic-gate static void print_list(title, list)
270*7c478bd9Sstevel@tonic-gate char   *title;
271*7c478bd9Sstevel@tonic-gate char   *list;
272*7c478bd9Sstevel@tonic-gate {
273*7c478bd9Sstevel@tonic-gate     char    buf[BUFLEN];
274*7c478bd9Sstevel@tonic-gate     char   *cp;
275*7c478bd9Sstevel@tonic-gate     char   *next;
276*7c478bd9Sstevel@tonic-gate 
277*7c478bd9Sstevel@tonic-gate     fputs(title, stdout);
278*7c478bd9Sstevel@tonic-gate     strcpy(buf, list);
279*7c478bd9Sstevel@tonic-gate 
280*7c478bd9Sstevel@tonic-gate     for (cp = strtok(buf, sep); cp != 0; cp = next) {
281*7c478bd9Sstevel@tonic-gate 	fputs(cp, stdout);
282*7c478bd9Sstevel@tonic-gate 	next = strtok((char *) 0, sep);
283*7c478bd9Sstevel@tonic-gate 	if (next != 0)
284*7c478bd9Sstevel@tonic-gate 	    fputs(" ", stdout);
285*7c478bd9Sstevel@tonic-gate     }
286*7c478bd9Sstevel@tonic-gate     fputs("\n", stdout);
287*7c478bd9Sstevel@tonic-gate }
288*7c478bd9Sstevel@tonic-gate 
289*7c478bd9Sstevel@tonic-gate /* check_daemon_list - criticize daemon list */
290*7c478bd9Sstevel@tonic-gate 
check_daemon_list(list)291*7c478bd9Sstevel@tonic-gate static void check_daemon_list(list)
292*7c478bd9Sstevel@tonic-gate char   *list;
293*7c478bd9Sstevel@tonic-gate {
294*7c478bd9Sstevel@tonic-gate     char    buf[BUFLEN];
295*7c478bd9Sstevel@tonic-gate     char   *cp;
296*7c478bd9Sstevel@tonic-gate     char   *host;
297*7c478bd9Sstevel@tonic-gate     int     daemons = 0;
298*7c478bd9Sstevel@tonic-gate 
299*7c478bd9Sstevel@tonic-gate     strcpy(buf, list);
300*7c478bd9Sstevel@tonic-gate 
301*7c478bd9Sstevel@tonic-gate     for (cp = strtok(buf, sep); cp != 0; cp = strtok((char *) 0, sep)) {
302*7c478bd9Sstevel@tonic-gate 	if (STR_EQ(cp, "EXCEPT")) {
303*7c478bd9Sstevel@tonic-gate 	    daemons = 0;
304*7c478bd9Sstevel@tonic-gate 	} else {
305*7c478bd9Sstevel@tonic-gate 	    daemons++;
306*7c478bd9Sstevel@tonic-gate 	    if ((host = split_at(cp + 1, '@')) != 0 && check_host(host) > 1) {
307*7c478bd9Sstevel@tonic-gate 		tcpd_warn("host %s has more than one address", host);
308*7c478bd9Sstevel@tonic-gate 		tcpd_warn("(consider using an address instead)");
309*7c478bd9Sstevel@tonic-gate 	    }
310*7c478bd9Sstevel@tonic-gate 	    check_daemon(cp);
311*7c478bd9Sstevel@tonic-gate 	}
312*7c478bd9Sstevel@tonic-gate     }
313*7c478bd9Sstevel@tonic-gate     if (daemons == 0)
314*7c478bd9Sstevel@tonic-gate 	tcpd_warn("daemon list is empty or ends in EXCEPT");
315*7c478bd9Sstevel@tonic-gate }
316*7c478bd9Sstevel@tonic-gate 
317*7c478bd9Sstevel@tonic-gate /* check_client_list - criticize client list */
318*7c478bd9Sstevel@tonic-gate 
check_client_list(list)319*7c478bd9Sstevel@tonic-gate static void check_client_list(list)
320*7c478bd9Sstevel@tonic-gate char   *list;
321*7c478bd9Sstevel@tonic-gate {
322*7c478bd9Sstevel@tonic-gate     char    buf[BUFLEN];
323*7c478bd9Sstevel@tonic-gate     char   *cp;
324*7c478bd9Sstevel@tonic-gate     char   *host;
325*7c478bd9Sstevel@tonic-gate     int     clients = 0;
326*7c478bd9Sstevel@tonic-gate 
327*7c478bd9Sstevel@tonic-gate     strcpy(buf, list);
328*7c478bd9Sstevel@tonic-gate 
329*7c478bd9Sstevel@tonic-gate     for (cp = strtok(buf, sep); cp != 0; cp = strtok((char *) 0, sep)) {
330*7c478bd9Sstevel@tonic-gate 	if (STR_EQ(cp, "EXCEPT")) {
331*7c478bd9Sstevel@tonic-gate 	    clients = 0;
332*7c478bd9Sstevel@tonic-gate 	} else {
333*7c478bd9Sstevel@tonic-gate 	    clients++;
334*7c478bd9Sstevel@tonic-gate 	    if (host = split_at(cp + 1, '@')) {	/* user@host */
335*7c478bd9Sstevel@tonic-gate 		check_user(cp);
336*7c478bd9Sstevel@tonic-gate 		check_host(host);
337*7c478bd9Sstevel@tonic-gate 	    } else {
338*7c478bd9Sstevel@tonic-gate 		check_host(cp);
339*7c478bd9Sstevel@tonic-gate 	    }
340*7c478bd9Sstevel@tonic-gate 	}
341*7c478bd9Sstevel@tonic-gate     }
342*7c478bd9Sstevel@tonic-gate     if (clients == 0)
343*7c478bd9Sstevel@tonic-gate 	tcpd_warn("client list is empty or ends in EXCEPT");
344*7c478bd9Sstevel@tonic-gate }
345*7c478bd9Sstevel@tonic-gate 
346*7c478bd9Sstevel@tonic-gate /* check_daemon - criticize daemon pattern */
347*7c478bd9Sstevel@tonic-gate 
check_daemon(pat)348*7c478bd9Sstevel@tonic-gate static void check_daemon(pat)
349*7c478bd9Sstevel@tonic-gate char   *pat;
350*7c478bd9Sstevel@tonic-gate {
351*7c478bd9Sstevel@tonic-gate     if (pat[0] == '@') {
352*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: daemon name begins with \"@\"", pat);
353*7c478bd9Sstevel@tonic-gate     } else if (pat[0] == '.') {
354*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: daemon name begins with dot", pat);
355*7c478bd9Sstevel@tonic-gate     } else if (pat[strlen(pat) - 1] == '.') {
356*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: daemon name ends in dot", pat);
357*7c478bd9Sstevel@tonic-gate     } else if (STR_EQ(pat, "ALL") || STR_EQ(pat, unknown)) {
358*7c478bd9Sstevel@tonic-gate 	 /* void */ ;
359*7c478bd9Sstevel@tonic-gate     } else if (STR_EQ(pat, "FAIL")) {		/* obsolete */
360*7c478bd9Sstevel@tonic-gate 	tcpd_warn("FAIL is no longer recognized");
361*7c478bd9Sstevel@tonic-gate 	tcpd_warn("(use EXCEPT or DENY instead)");
362*7c478bd9Sstevel@tonic-gate     } else if (reserved_name(pat)) {
363*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: daemon name may be reserved word", pat);
364*7c478bd9Sstevel@tonic-gate     } else {
365*7c478bd9Sstevel@tonic-gate 	switch (inet_get(pat)) {
366*7c478bd9Sstevel@tonic-gate 	case WR_UNKNOWN:
367*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s: no such process name in %s", pat, inetcf);
368*7c478bd9Sstevel@tonic-gate 	    inet_set(pat, WR_YES);		/* shut up next time */
369*7c478bd9Sstevel@tonic-gate 	    break;
370*7c478bd9Sstevel@tonic-gate 	case WR_NOT:
371*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s: service possibly not wrapped", pat);
372*7c478bd9Sstevel@tonic-gate 	    inet_set(pat, WR_YES);
373*7c478bd9Sstevel@tonic-gate 	    break;
374*7c478bd9Sstevel@tonic-gate 	}
375*7c478bd9Sstevel@tonic-gate     }
376*7c478bd9Sstevel@tonic-gate }
377*7c478bd9Sstevel@tonic-gate 
378*7c478bd9Sstevel@tonic-gate /* check_user - criticize user pattern */
379*7c478bd9Sstevel@tonic-gate 
check_user(pat)380*7c478bd9Sstevel@tonic-gate static void check_user(pat)
381*7c478bd9Sstevel@tonic-gate char   *pat;
382*7c478bd9Sstevel@tonic-gate {
383*7c478bd9Sstevel@tonic-gate     if (pat[0] == '@') {			/* @netgroup */
384*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: user name begins with \"@\"", pat);
385*7c478bd9Sstevel@tonic-gate     } else if (pat[0] == '.') {
386*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: user name begins with dot", pat);
387*7c478bd9Sstevel@tonic-gate     } else if (pat[strlen(pat) - 1] == '.') {
388*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: user name ends in dot", pat);
389*7c478bd9Sstevel@tonic-gate     } else if (STR_EQ(pat, "ALL") || STR_EQ(pat, unknown)
390*7c478bd9Sstevel@tonic-gate 	       || STR_EQ(pat, "KNOWN")) {
391*7c478bd9Sstevel@tonic-gate 	 /* void */ ;
392*7c478bd9Sstevel@tonic-gate     } else if (STR_EQ(pat, "FAIL")) {		/* obsolete */
393*7c478bd9Sstevel@tonic-gate 	tcpd_warn("FAIL is no longer recognized");
394*7c478bd9Sstevel@tonic-gate 	tcpd_warn("(use EXCEPT or DENY instead)");
395*7c478bd9Sstevel@tonic-gate     } else if (reserved_name(pat)) {
396*7c478bd9Sstevel@tonic-gate 	tcpd_warn("%s: user name may be reserved word", pat);
397*7c478bd9Sstevel@tonic-gate     }
398*7c478bd9Sstevel@tonic-gate }
399*7c478bd9Sstevel@tonic-gate 
400*7c478bd9Sstevel@tonic-gate /* check_host - criticize host pattern */
401*7c478bd9Sstevel@tonic-gate 
check_host(pat)402*7c478bd9Sstevel@tonic-gate static int check_host(pat)
403*7c478bd9Sstevel@tonic-gate char   *pat;
404*7c478bd9Sstevel@tonic-gate {
405*7c478bd9Sstevel@tonic-gate     char   *mask;
406*7c478bd9Sstevel@tonic-gate     int     addr_count = 1;
407*7c478bd9Sstevel@tonic-gate 
408*7c478bd9Sstevel@tonic-gate     if (pat[0] == '@') {			/* @netgroup */
409*7c478bd9Sstevel@tonic-gate #ifdef NO_NETGRENT
410*7c478bd9Sstevel@tonic-gate 	/* SCO has no *netgrent() support */
411*7c478bd9Sstevel@tonic-gate #else
412*7c478bd9Sstevel@tonic-gate #ifdef NETGROUP
413*7c478bd9Sstevel@tonic-gate 	char   *machinep;
414*7c478bd9Sstevel@tonic-gate 	char   *userp;
415*7c478bd9Sstevel@tonic-gate 	char   *domainp;
416*7c478bd9Sstevel@tonic-gate 
417*7c478bd9Sstevel@tonic-gate 	setnetgrent(pat + 1);
418*7c478bd9Sstevel@tonic-gate 	if (getnetgrent(&machinep, &userp, &domainp) == 0)
419*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s: unknown or empty netgroup", pat + 1);
420*7c478bd9Sstevel@tonic-gate 	endnetgrent();
421*7c478bd9Sstevel@tonic-gate #else
422*7c478bd9Sstevel@tonic-gate 	tcpd_warn("netgroup support disabled");
423*7c478bd9Sstevel@tonic-gate #endif
424*7c478bd9Sstevel@tonic-gate #endif
425*7c478bd9Sstevel@tonic-gate #ifdef HAVE_IPV6
426*7c478bd9Sstevel@tonic-gate     } else if (pat[0] == '[') {
427*7c478bd9Sstevel@tonic-gate 	    struct in6_addr in6;
428*7c478bd9Sstevel@tonic-gate 	    char *cbr = strchr(pat, ']');
429*7c478bd9Sstevel@tonic-gate 	    char *slash = strchr(pat, '/');
430*7c478bd9Sstevel@tonic-gate 	    int err = 0;
431*7c478bd9Sstevel@tonic-gate 	    int mask = IPV6_ABITS;
432*7c478bd9Sstevel@tonic-gate 
433*7c478bd9Sstevel@tonic-gate 	    if (slash != NULL) {
434*7c478bd9Sstevel@tonic-gate 		*slash = '\0';
435*7c478bd9Sstevel@tonic-gate 		mask = atoi(slash + 1);
436*7c478bd9Sstevel@tonic-gate 		err = mask < 0 || mask > IPV6_ABITS;
437*7c478bd9Sstevel@tonic-gate 	    }
438*7c478bd9Sstevel@tonic-gate 	    if (cbr == NULL)
439*7c478bd9Sstevel@tonic-gate 		err = 1;
440*7c478bd9Sstevel@tonic-gate 	    else {
441*7c478bd9Sstevel@tonic-gate 		*cbr = '\0';
442*7c478bd9Sstevel@tonic-gate 		err += inet_pton(AF_INET6, pat+1, &in6) != 1;
443*7c478bd9Sstevel@tonic-gate 	    }
444*7c478bd9Sstevel@tonic-gate 	    if (slash) *slash = '/';
445*7c478bd9Sstevel@tonic-gate 	    if (cbr) *cbr = ']';
446*7c478bd9Sstevel@tonic-gate 	    if (err)
447*7c478bd9Sstevel@tonic-gate 		tcpd_warn("bad IP6 address specification: %s", pat);
448*7c478bd9Sstevel@tonic-gate #endif
449*7c478bd9Sstevel@tonic-gate     } else if (mask = split_at(pat, '/')) {	/* network/netmask */
450*7c478bd9Sstevel@tonic-gate 	if (dot_quad_addr(pat) == INADDR_NONE
451*7c478bd9Sstevel@tonic-gate 	    || dot_quad_addr(mask) == INADDR_NONE)
452*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s/%s: bad net/mask pattern", pat, mask);
453*7c478bd9Sstevel@tonic-gate     } else if (STR_EQ(pat, "FAIL")) {		/* obsolete */
454*7c478bd9Sstevel@tonic-gate 	tcpd_warn("FAIL is no longer recognized");
455*7c478bd9Sstevel@tonic-gate 	tcpd_warn("(use EXCEPT or DENY instead)");
456*7c478bd9Sstevel@tonic-gate     } else if (reserved_name(pat)) {		/* other reserved */
457*7c478bd9Sstevel@tonic-gate 	 /* void */ ;
458*7c478bd9Sstevel@tonic-gate     } else if (NOT_INADDR(pat)) {		/* internet name */
459*7c478bd9Sstevel@tonic-gate 	if (pat[strlen(pat) - 1] == '.') {
460*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s: domain or host name ends in dot", pat);
461*7c478bd9Sstevel@tonic-gate 	} else if (pat[0] != '.') {
462*7c478bd9Sstevel@tonic-gate 	    addr_count = check_dns(pat);
463*7c478bd9Sstevel@tonic-gate 	}
464*7c478bd9Sstevel@tonic-gate     } else {					/* numeric form */
465*7c478bd9Sstevel@tonic-gate 	if (STR_EQ(pat, "0.0.0.0") || STR_EQ(pat, "255.255.255.255")) {
466*7c478bd9Sstevel@tonic-gate 	    /* void */ ;
467*7c478bd9Sstevel@tonic-gate 	} else if (pat[0] == '.') {
468*7c478bd9Sstevel@tonic-gate 	    tcpd_warn("%s: network number begins with dot", pat);
469*7c478bd9Sstevel@tonic-gate 	} else if (pat[strlen(pat) - 1] != '.') {
470*7c478bd9Sstevel@tonic-gate 	    check_dns(pat);
471*7c478bd9Sstevel@tonic-gate 	}
472*7c478bd9Sstevel@tonic-gate     }
473*7c478bd9Sstevel@tonic-gate     return (addr_count);
474*7c478bd9Sstevel@tonic-gate }
475*7c478bd9Sstevel@tonic-gate 
476*7c478bd9Sstevel@tonic-gate /* reserved_name - determine if name is reserved */
477*7c478bd9Sstevel@tonic-gate 
reserved_name(pat)478*7c478bd9Sstevel@tonic-gate static int reserved_name(pat)
479*7c478bd9Sstevel@tonic-gate char   *pat;
480*7c478bd9Sstevel@tonic-gate {
481*7c478bd9Sstevel@tonic-gate     return (STR_EQ(pat, unknown)
482*7c478bd9Sstevel@tonic-gate 	    || STR_EQ(pat, "KNOWN")
483*7c478bd9Sstevel@tonic-gate 	    || STR_EQ(pat, paranoid)
484*7c478bd9Sstevel@tonic-gate 	    || STR_EQ(pat, "ALL")
485*7c478bd9Sstevel@tonic-gate 	    || STR_EQ(pat, "LOCAL"));
486*7c478bd9Sstevel@tonic-gate }
487