summaryrefslogtreecommitdiff
path: root/source3/utils/net_lookup.c
blob: 7f79b6d4f1e645a6f34ff4e474922a9005d7fd28 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/* 
   Samba Unix/Linux SMB client library 
   net lookup command
   Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "includes.h"
#include "utils/net.h"

int net_lookup_usage(int argc, const char **argv)
{
	d_printf(
"  net lookup [host] HOSTNAME[#<type>]\n\tgives IP for a hostname\n\n"
"  net lookup ldap [domain]\n\tgives IP of domain's ldap server\n\n"
"  net lookup kdc [realm]\n\tgives IP of realm's kerberos KDC\n\n"
"  net lookup dc [domain]\n\tgives IP of domains Domain Controllers\n\n"
"  net lookup master [domain|wg]\n\tgive IP of master browser\n\n"
);
	return -1;
}

/* lookup a hostname giving an IP */
static int net_lookup_host(int argc, const char **argv)
{
	struct in_addr ip;
	int name_type = 0x20;
	const char *name = argv[0];
	char *p;

	if (argc == 0) 
		return net_lookup_usage(argc, argv);

	p = strchr_m(name,'#');
	if (p) {
		*p = '\0';
		sscanf(++p,"%x",&name_type);
	}
	
	if (!resolve_name(name, &ip, name_type)) {
		/* we deliberately use DEBUG() here to send it to stderr 
		   so scripts aren't mucked up */
		DEBUG(0,("Didn't find %s#%02x\n", name, name_type));
		return -1;
	}

	d_printf("%s\n", inet_ntoa(ip));
	return 0;
}

#ifdef HAVE_LDAP
static void print_ldap_srvlist(char *srvlist)
{
	char *cur, *next;
	struct in_addr ip;
	BOOL printit;

	cur = srvlist;
	do {
		next = strchr(cur,':');
		if (next) *next++='\0';
		printit = resolve_name(cur, &ip, 0x20);
		cur=next;
		next=cur ? strchr(cur,' ') :NULL;
		if (next)
			*next++='\0';
		if (printit)
			d_printf("%s:%s\n", inet_ntoa(ip), cur?cur:"");
		cur = next;
	} while (next);
}
#endif

static int net_lookup_ldap(int argc, const char **argv)
{
#ifdef HAVE_LDAP
	char *srvlist;
	const char *domain;
	int rc;
	struct in_addr addr;
	struct hostent *hostent;

	if (argc > 0)
		domain = argv[0];
	else
		domain = opt_target_workgroup;

	DEBUG(9, ("Lookup up ldap for domain %s\n", domain));
	rc = ldap_domain2hostlist(domain, &srvlist);
	if ((rc == LDAP_SUCCESS) && srvlist) {
		print_ldap_srvlist(srvlist);
		return 0;
	}

     	DEBUG(9, ("Looking up DC for domain %s\n", domain));
	if (!get_pdc_ip(domain, &addr))
		return -1;

	hostent = gethostbyaddr((char *) &addr.s_addr, sizeof(addr.s_addr),
				AF_INET);
	if (!hostent)
		return -1;

	DEBUG(9, ("Found DC with DNS name %s\n", hostent->h_name));
	domain = strchr(hostent->h_name, '.');
	if (!domain)
		return -1;
	domain++;

	DEBUG(9, ("Looking up ldap for domain %s\n", domain));
	rc = ldap_domain2hostlist(domain, &srvlist);
	if ((rc == LDAP_SUCCESS) && srvlist) {
		print_ldap_srvlist(srvlist);
		return 0;
	}
	return -1;
#endif
	DEBUG(1,("No LDAP support\n"));
	return -1;
}

static int net_lookup_dc(int argc, const char **argv)
{
	struct ip_service *ip_list;
	struct in_addr addr;
	char *pdc_str = NULL;
	const char *domain=opt_target_workgroup;
	int count, i;

	if (argc > 0)
		domain=argv[0];

	/* first get PDC */
	if (!get_pdc_ip(domain, &addr))
		return -1;

	asprintf(&pdc_str, "%s", inet_ntoa(addr));
	d_printf("%s\n", pdc_str);

	if (!get_sorted_dc_list(domain, &ip_list, &count, False)) {
		SAFE_FREE(pdc_str);
		return 0;
	}
	for (i=0;i<count;i++) {
		char *dc_str = inet_ntoa(ip_list[i].ip);
		if (!strequal(pdc_str, dc_str))
			d_printf("%s\n", dc_str);
	}
	SAFE_FREE(pdc_str);
	return 0;
}

static int net_lookup_master(int argc, const char **argv)
{
	struct in_addr master_ip;
	const char *domain=opt_target_workgroup;

	if (argc > 0)
		domain=argv[0];

	if (!find_master_ip(domain, &master_ip))
		return -1;
	d_printf("%s\n", inet_ntoa(master_ip));
	return 0;
}

static int net_lookup_kdc(int argc, const char **argv)
{
#ifdef HAVE_KRB5
	krb5_error_code rc;
	krb5_context ctx;
	struct sockaddr_in *addrs;
	int num_kdcs,i;
	krb5_data realm;
	char **realms;

	rc = krb5_init_context(&ctx);
	if (rc) {
		DEBUG(1,("krb5_init_context failed (%s)\n", 
			 error_message(rc)));
		return -1;
	}

	if (argc>0) {
                realm.data = CONST_DISCARD(krb5_pointer, argv[0]);
		realm.length = strlen(argv[0]);
	} else if (lp_realm() && *lp_realm()) {
		realm.data = (krb5_pointer) lp_realm();
		realm.length = strlen(realm.data);
	} else {
		rc = krb5_get_host_realm(ctx, NULL, &realms);
		if (rc) {
			DEBUG(1,("krb5_gethost_realm failed (%s)\n",
				 error_message(rc)));
			return -1;
		}
		realm.data = (krb5_pointer) *realms;
		realm.length = strlen(realm.data);
	}

	rc = krb5_locate_kdc(ctx, &realm, (struct sockaddr **) &addrs, &num_kdcs, 0);
	if (rc) {
		DEBUG(1, ("krb5_locate_kdc failed (%s)\n", error_message(rc)));
		return -1;
	}
	for (i=0;i<num_kdcs;i++)
		if (addrs[i].sin_family == AF_INET) 
			d_printf("%s:%hd\n", inet_ntoa(addrs[i].sin_addr),
				 ntohs(addrs[i].sin_port));
	return 0;

#endif	
	DEBUG(1, ("No kerberos support\n"));
	return -1;
}


/* lookup hosts or IP addresses using internal samba lookup fns */
int net_lookup(int argc, const char **argv)
{
	int i;

	struct functable table[] = {
		{"HOST", net_lookup_host},
		{"LDAP", net_lookup_ldap},
		{"DC", net_lookup_dc},
		{"MASTER", net_lookup_master},
		{"KDC", net_lookup_kdc},
		{NULL, NULL}
	};

	if (argc < 1) {
		d_printf("\nUsage: \n");
		return net_lookup_usage(argc, argv);
	}
	for (i=0; table[i].funcname; i++) {
		if (StrCaseCmp(argv[0], table[i].funcname) == 0)
			return table[i].fn(argc-1, argv+1);
	}

	/* Default to lookup a hostname so 'net lookup foo#1b' can be 
	   used instead of 'net lookup host foo#1b'.  The host syntax
	   is a bit confusing as non #00 names can't really be 
	   considered hosts as such. */

	return net_lookup_host(argc, argv);
}