2 Samba Unix/Linux Dynamic DNS Update
5 Copyright (C) Krishna Ganugapati (krishnag@centeris.com) 2006
6 Copyright (C) Gerald Carter 2006
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.
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.
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/>.
23 #include "utils/net.h"
26 #if defined(WITH_DNS_UPDATES)
29 * Silly prototype to get rid of a warning
32 DNS_ERROR DoDNSUpdate(char *pszServerName,
33 const char *pszDomainName, const char *pszHostName,
34 const struct sockaddr_storage *sslist,
37 /*********************************************************************
38 *********************************************************************/
40 DNS_ERROR DoDNSUpdate(char *pszServerName,
41 const char *pszDomainName, const char *pszHostName,
42 const struct sockaddr_storage *sslist, size_t num_addrs )
45 struct dns_connection *conn;
48 struct dns_update_request *req, *resp;
50 if ( (num_addrs <= 0) || !sslist ) {
51 return ERROR_DNS_INVALID_PARAMETER;
54 if (!(mem_ctx = talloc_init("DoDNSUpdate"))) {
55 return ERROR_DNS_NO_MEMORY;
58 err = dns_open_connection( pszServerName, DNS_TCP, mem_ctx, &conn );
59 if (!ERR_DNS_IS_OK(err)) {
64 * Probe if everything's fine
67 err = dns_create_probe(mem_ctx, pszDomainName, pszHostName,
68 num_addrs, sslist, &req);
69 if (!ERR_DNS_IS_OK(err)) goto error;
71 err = dns_update_transaction(mem_ctx, conn, req, &resp);
72 if (!ERR_DNS_IS_OK(err)) goto error;
74 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
76 return ERROR_DNS_SUCCESS;
80 * First try without signing
83 err = dns_create_update_request(mem_ctx, pszDomainName, pszHostName,
84 sslist, num_addrs, &req);
85 if (!ERR_DNS_IS_OK(err)) goto error;
87 err = dns_update_transaction(mem_ctx, conn, req, &resp);
88 if (!ERR_DNS_IS_OK(err)) goto error;
90 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
92 return ERROR_DNS_SUCCESS;
96 * Okay, we have to try with signing
99 gss_ctx_id_t gss_context;
102 if (!(keyname = dns_generate_keyname( mem_ctx ))) {
103 err = ERROR_DNS_NO_MEMORY;
107 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
108 keyname, &gss_context, DNS_SRV_ANY );
110 /* retry using the Windows 2000 DNS hack */
111 if (!ERR_DNS_IS_OK(err)) {
112 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
113 keyname, &gss_context,
117 if (!ERR_DNS_IS_OK(err))
120 err = dns_sign_update(req, gss_context, keyname,
121 "gss.microsoft.com", time(NULL), 3600);
123 gss_delete_sec_context(&minor, &gss_context, GSS_C_NO_BUFFER);
125 if (!ERR_DNS_IS_OK(err)) goto error;
127 err = dns_update_transaction(mem_ctx, conn, req, &resp);
128 if (!ERR_DNS_IS_OK(err)) goto error;
130 err = (dns_response_code(resp->flags) == DNS_NO_ERROR) ?
131 ERROR_DNS_SUCCESS : ERROR_DNS_UPDATE_FAILED;
136 TALLOC_FREE(mem_ctx);
140 /*********************************************************************
141 *********************************************************************/
143 int get_my_ip_address( struct sockaddr_storage **pp_ss )
147 struct sockaddr_storage *list = NULL;
150 /* Honor the configured list of interfaces to register */
159 if ( (list = SMB_MALLOC_ARRAY( struct sockaddr_storage, n )) == NULL ) {
163 for ( i=0; i<n; i++ ) {
164 const struct sockaddr_storage *nic_sa_storage = NULL;
166 if ((nic_sa_storage = iface_n_sockaddr_storage(i)) == NULL)
169 /* Don't register loopback addresses */
170 if (is_loopback_addr((struct sockaddr *)nic_sa_storage)) {
174 memcpy(&list[count++], nic_sa_storage, sizeof(struct sockaddr_storage));
182 * Silly prototype to get rid of a warning
185 DNS_ERROR do_gethostbyname(const char *server, const char *host);
187 DNS_ERROR do_gethostbyname(const char *server, const char *host)
189 struct dns_connection *conn;
190 struct dns_request *req, *resp;
193 err = dns_open_connection(server, DNS_UDP, NULL, &conn);
194 if (!ERR_DNS_IS_OK(err)) goto error;
196 err = dns_create_query(conn, host, QTYPE_A, DNS_CLASS_IN, &req);
197 if (!ERR_DNS_IS_OK(err)) goto error;
199 err = dns_transaction(conn, conn, req, &resp);
206 #endif /* defined(WITH_DNS_UPDATES) */