source: vendor/3.5.0/source3/utils/net_dns.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 5.1 KB
Line 
1
2/*
3 Samba Unix/Linux Dynamic DNS Update
4 net ads commands
5
6 Copyright (C) Krishna Ganugapati (krishnag@centeris.com) 2006
7 Copyright (C) Gerald Carter 2006
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21*/
22
23#include "includes.h"
24#include "utils/net.h"
25#include "dns.h"
26
27#if defined(WITH_DNS_UPDATES)
28
29/*
30 * Silly prototype to get rid of a warning
31 */
32
33DNS_ERROR DoDNSUpdate(char *pszServerName,
34 const char *pszDomainName, const char *pszHostName,
35 const struct sockaddr_storage *sslist,
36 size_t num_addrs );
37
38/*********************************************************************
39*********************************************************************/
40
41DNS_ERROR DoDNSUpdate(char *pszServerName,
42 const char *pszDomainName, const char *pszHostName,
43 const struct sockaddr_storage *sslist, size_t num_addrs )
44{
45 DNS_ERROR err;
46 struct dns_connection *conn;
47 TALLOC_CTX *mem_ctx;
48 OM_uint32 minor;
49 struct dns_update_request *req, *resp;
50
51 if ( (num_addrs <= 0) || !sslist ) {
52 return ERROR_DNS_INVALID_PARAMETER;
53 }
54
55 if (!(mem_ctx = talloc_init("DoDNSUpdate"))) {
56 return ERROR_DNS_NO_MEMORY;
57 }
58
59 err = dns_open_connection( pszServerName, DNS_TCP, mem_ctx, &conn );
60 if (!ERR_DNS_IS_OK(err)) {
61 goto error;
62 }
63
64 /*
65 * Probe if everything's fine
66 */
67
68 err = dns_create_probe(mem_ctx, pszDomainName, pszHostName,
69 num_addrs, sslist, &req);
70 if (!ERR_DNS_IS_OK(err)) goto error;
71
72 err = dns_update_transaction(mem_ctx, conn, req, &resp);
73 if (!ERR_DNS_IS_OK(err)) goto error;
74
75 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
76 TALLOC_FREE(mem_ctx);
77 return ERROR_DNS_SUCCESS;
78 }
79
80 /*
81 * First try without signing
82 */
83
84 err = dns_create_update_request(mem_ctx, pszDomainName, pszHostName,
85 sslist, num_addrs, &req);
86 if (!ERR_DNS_IS_OK(err)) goto error;
87
88 err = dns_update_transaction(mem_ctx, conn, req, &resp);
89 if (!ERR_DNS_IS_OK(err)) goto error;
90
91 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
92 TALLOC_FREE(mem_ctx);
93 return ERROR_DNS_SUCCESS;
94 }
95
96 /*
97 * Okay, we have to try with signing
98 */
99 {
100 gss_ctx_id_t gss_context;
101 char *keyname;
102
103 if (!(keyname = dns_generate_keyname( mem_ctx ))) {
104 err = ERROR_DNS_NO_MEMORY;
105 goto error;
106 }
107
108 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
109 keyname, &gss_context, DNS_SRV_ANY );
110
111 /* retry using the Windows 2000 DNS hack */
112 if (!ERR_DNS_IS_OK(err)) {
113 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
114 keyname, &gss_context,
115 DNS_SRV_WIN2000 );
116 }
117
118 if (!ERR_DNS_IS_OK(err))
119 goto error;
120
121
122 err = dns_sign_update(req, gss_context, keyname,
123 "gss.microsoft.com", time(NULL), 3600);
124
125 gss_delete_sec_context(&minor, &gss_context, GSS_C_NO_BUFFER);
126
127 if (!ERR_DNS_IS_OK(err)) goto error;
128
129 err = dns_update_transaction(mem_ctx, conn, req, &resp);
130 if (!ERR_DNS_IS_OK(err)) goto error;
131
132 err = (dns_response_code(resp->flags) == DNS_NO_ERROR) ?
133 ERROR_DNS_SUCCESS : ERROR_DNS_UPDATE_FAILED;
134 }
135
136
137error:
138 TALLOC_FREE(mem_ctx);
139 return err;
140}
141
142/*********************************************************************
143*********************************************************************/
144
145int get_my_ip_address( struct sockaddr_storage **pp_ss )
146
147{
148 int i, n;
149 struct sockaddr_storage *list = NULL;
150 int count = 0;
151
152 /* Honor the configured list of interfaces to register */
153
154 load_interfaces();
155 n = iface_count();
156
157 if (n <= 0) {
158 return -1;
159 }
160
161 if ( (list = SMB_MALLOC_ARRAY( struct sockaddr_storage, n )) == NULL ) {
162 return -1;
163 }
164
165 for ( i=0; i<n; i++ ) {
166 const struct sockaddr_storage *nic_sa_storage = NULL;
167
168 if ((nic_sa_storage = iface_n_sockaddr_storage(i)) == NULL)
169 continue;
170
171 /* Don't register loopback addresses */
172 if (is_loopback_addr((struct sockaddr *)nic_sa_storage)) {
173 continue;
174 }
175
176 memcpy(&list[count++], nic_sa_storage, sizeof(struct sockaddr_storage));
177 }
178 *pp_ss = list;
179
180 return count;
181}
182
183/*
184 * Silly prototype to get rid of a warning
185 */
186
187DNS_ERROR do_gethostbyname(const char *server, const char *host);
188
189DNS_ERROR do_gethostbyname(const char *server, const char *host)
190{
191 struct dns_connection *conn;
192 struct dns_request *req, *resp;
193 DNS_ERROR err;
194
195 err = dns_open_connection(server, DNS_UDP, NULL, &conn);
196 if (!ERR_DNS_IS_OK(err)) goto error;
197
198 err = dns_create_query(conn, host, QTYPE_A, DNS_CLASS_IN, &req);
199 if (!ERR_DNS_IS_OK(err)) goto error;
200
201 err = dns_transaction(conn, conn, req, &resp);
202
203 error:
204 TALLOC_FREE(conn);
205 return err;
206}
207
208#endif /* defined(WITH_DNS_UPDATES) */
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