source: vendor/3.6.9/source3/utils/net_dns.c

Last change on this file was 740, checked in by Silvan Scherrer, 13 years ago

Samba Server: update vendor to 3.6.0
File size: 5.3 KB
Line 
1/*
2 Samba Unix/Linux Dynamic DNS Update
3 net ads commands
4
5 Copyright (C) Krishna Ganugapati (krishnag@centeris.com) 2006
6 Copyright (C) Gerald Carter 2006
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "utils/net.h"
24#include "../lib/addns/dns.h"
25
26#if defined(WITH_DNS_UPDATES)
27/*
28 * Silly prototype to get rid of a warning
29 */
30
31DNS_ERROR DoDNSUpdate(char *pszServerName,
32 const char *pszDomainName, const char *pszHostName,
33 const struct sockaddr_storage *sslist,
34 size_t num_addrs );
35
36/*********************************************************************
37*********************************************************************/
38
39DNS_ERROR DoDNSUpdate(char *pszServerName,
40 const char *pszDomainName, const char *pszHostName,
41 const struct sockaddr_storage *sslist, size_t num_addrs )
42{
43 DNS_ERROR err;
44 struct dns_connection *conn;
45 TALLOC_CTX *mem_ctx;
46 OM_uint32 minor;
47 struct dns_update_request *req, *resp;
48
49 if ( (num_addrs <= 0) || !sslist ) {
50 return ERROR_DNS_INVALID_PARAMETER;
51 }
52
53 if (!(mem_ctx = talloc_init("DoDNSUpdate"))) {
54 return ERROR_DNS_NO_MEMORY;
55 }
56
57 err = dns_open_connection( pszServerName, DNS_TCP, mem_ctx, &conn );
58 if (!ERR_DNS_IS_OK(err)) {
59 goto error;
60 }
61
62 /*
63 * Probe if everything's fine
64 */
65
66 err = dns_create_probe(mem_ctx, pszDomainName, pszHostName,
67 num_addrs, sslist, &req);
68 if (!ERR_DNS_IS_OK(err)) goto error;
69
70 err = dns_update_transaction(mem_ctx, conn, req, &resp);
71 if (!ERR_DNS_IS_OK(err)) goto error;
72
73 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
74 TALLOC_FREE(mem_ctx);
75 return ERROR_DNS_SUCCESS;
76 }
77
78 /*
79 * First try without signing
80 */
81
82 err = dns_create_update_request(mem_ctx, pszDomainName, pszHostName,
83 sslist, num_addrs, &req);
84 if (!ERR_DNS_IS_OK(err)) goto error;
85
86 err = dns_update_transaction(mem_ctx, conn, req, &resp);
87 if (!ERR_DNS_IS_OK(err)) goto error;
88
89 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
90 TALLOC_FREE(mem_ctx);
91 return ERROR_DNS_SUCCESS;
92 }
93
94 /*
95 * Okay, we have to try with signing
96 */
97 {
98 gss_ctx_id_t gss_context;
99 char *keyname;
100
101 if (!(keyname = dns_generate_keyname( mem_ctx ))) {
102 err = ERROR_DNS_NO_MEMORY;
103 goto error;
104 }
105
106 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
107 keyname, &gss_context, DNS_SRV_ANY );
108
109 /* retry using the Windows 2000 DNS hack */
110 if (!ERR_DNS_IS_OK(err)) {
111 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
112 keyname, &gss_context,
113 DNS_SRV_WIN2000 );
114 }
115
116 if (!ERR_DNS_IS_OK(err))
117 goto error;
118
119 err = dns_sign_update(req, gss_context, keyname,
120 "gss.microsoft.com", time(NULL), 3600);
121
122 gss_delete_sec_context(&minor, &gss_context, GSS_C_NO_BUFFER);
123
124 if (!ERR_DNS_IS_OK(err)) goto error;
125
126 err = dns_update_transaction(mem_ctx, conn, req, &resp);
127 if (!ERR_DNS_IS_OK(err)) goto error;
128
129 err = (dns_response_code(resp->flags) == DNS_NO_ERROR) ?
130 ERROR_DNS_SUCCESS : ERROR_DNS_UPDATE_FAILED;
131 }
132
133
134error:
135 TALLOC_FREE(mem_ctx);
136 return err;
137}
138
139/*********************************************************************
140*********************************************************************/
141
142int get_my_ip_address( struct sockaddr_storage **pp_ss )
143
144{
145 int i, n;
146 struct sockaddr_storage *list = NULL;
147 int count = 0;
148
149 /* Honor the configured list of interfaces to register */
150
151 load_interfaces();
152 n = iface_count();
153
154 if (n <= 0) {
155 return -1;
156 }
157
158 if ( (list = SMB_MALLOC_ARRAY( struct sockaddr_storage, n )) == NULL ) {
159 return -1;
160 }
161
162 for ( i=0; i<n; i++ ) {
163 const struct sockaddr_storage *nic_sa_storage = NULL;
164
165 if ((nic_sa_storage = iface_n_sockaddr_storage(i)) == NULL)
166 continue;
167
168 /* Don't register loopback addresses */
169 if (is_loopback_addr((struct sockaddr *)nic_sa_storage)) {
170 continue;
171 }
172
173 memcpy(&list[count++], nic_sa_storage, sizeof(struct sockaddr_storage));
174 }
175 *pp_ss = list;
176
177 return count;
178}
179
180/*
181 * Silly prototype to get rid of a warning
182 */
183
184DNS_ERROR do_gethostbyname(const char *server, const char *host);
185
186DNS_ERROR do_gethostbyname(const char *server, const char *host)
187{
188 struct dns_connection *conn;
189 struct dns_request *req, *resp;
190 DNS_ERROR err;
191
192 err = dns_open_connection(server, DNS_UDP, NULL, &conn);
193 if (!ERR_DNS_IS_OK(err)) goto error;
194
195 err = dns_create_query(conn, host, QTYPE_A, DNS_CLASS_IN, &req);
196 if (!ERR_DNS_IS_OK(err)) goto error;
197
198 err = dns_transaction(conn, conn, req, &resp);
199
200 error:
201 TALLOC_FREE(conn);
202 return err;
203}
204
205#endif /* defined(WITH_DNS_UPDATES) */
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