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"
24 #include "../lib/addns/dns.h"
25 #include "utils/net_dns.h"
27 #if defined(WITH_DNS_UPDATES)
29 /*********************************************************************
30 *********************************************************************/
32 DNS_ERROR DoDNSUpdate(char *pszServerName,
33 const char *pszDomainName, const char *pszHostName,
34 const struct sockaddr_storage *sslist, size_t num_addrs,
38 struct dns_connection *conn;
41 struct dns_update_request *req, *resp;
43 if ( (num_addrs <= 0) || !sslist ) {
44 return ERROR_DNS_INVALID_PARAMETER;
47 if (!(mem_ctx = talloc_init("DoDNSUpdate"))) {
48 return ERROR_DNS_NO_MEMORY;
51 err = dns_open_connection( pszServerName, DNS_TCP, mem_ctx, &conn );
52 if (!ERR_DNS_IS_OK(err)) {
57 * Probe if everything's fine
60 err = dns_create_probe(mem_ctx, pszDomainName, pszHostName,
61 num_addrs, sslist, &req);
62 if (!ERR_DNS_IS_OK(err)) goto error;
64 err = dns_update_transaction(mem_ctx, conn, req, &resp);
65 if (!ERR_DNS_IS_OK(err)) goto error;
67 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
69 return ERROR_DNS_SUCCESS;
73 * First try without signing
76 err = dns_create_update_request(mem_ctx, pszDomainName, pszHostName,
77 sslist, num_addrs, &req);
78 if (!ERR_DNS_IS_OK(err)) goto error;
80 err = dns_update_transaction(mem_ctx, conn, req, &resp);
81 if (!ERR_DNS_IS_OK(err)) goto error;
83 if (dns_response_code(resp->flags) == DNS_NO_ERROR) {
85 return ERROR_DNS_SUCCESS;
89 * Okay, we have to try with signing
92 gss_ctx_id_t gss_context;
95 if (!(keyname = dns_generate_keyname( mem_ctx ))) {
96 err = ERROR_DNS_NO_MEMORY;
100 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
101 keyname, &gss_context, DNS_SRV_ANY );
103 /* retry using the Windows 2000 DNS hack */
104 if (!ERR_DNS_IS_OK(err)) {
105 err = dns_negotiate_sec_ctx( pszDomainName, pszServerName,
106 keyname, &gss_context,
110 if (!ERR_DNS_IS_OK(err))
113 err = dns_sign_update(req, gss_context, keyname,
114 "gss.microsoft.com", time(NULL), 3600);
116 gss_delete_sec_context(&minor, &gss_context, GSS_C_NO_BUFFER);
118 if (!ERR_DNS_IS_OK(err)) goto error;
120 err = dns_update_transaction(mem_ctx, conn, req, &resp);
121 if (!ERR_DNS_IS_OK(err)) goto error;
123 err = (dns_response_code(resp->flags) == DNS_NO_ERROR) ?
124 ERROR_DNS_SUCCESS : ERROR_DNS_UPDATE_FAILED;
129 TALLOC_FREE(mem_ctx);
133 /*********************************************************************
134 *********************************************************************/
136 int get_my_ip_address( struct sockaddr_storage **pp_ss )
140 struct sockaddr_storage *list = NULL;
143 /* Honor the configured list of interfaces to register */
152 if ( (list = SMB_MALLOC_ARRAY( struct sockaddr_storage, n )) == NULL ) {
156 for ( i=0; i<n; i++ ) {
157 const struct sockaddr_storage *nic_sa_storage = NULL;
159 if ((nic_sa_storage = iface_n_sockaddr_storage(i)) == NULL)
162 /* Don't register loopback addresses */
163 if (is_loopback_addr((const struct sockaddr *)nic_sa_storage)) {
167 /* Don't register link-local addresses */
168 if (is_linklocal_addr(nic_sa_storage)) {
172 memcpy(&list[count++], nic_sa_storage, sizeof(struct sockaddr_storage));
179 DNS_ERROR do_gethostbyname(const char *server, const char *host)
181 struct dns_connection *conn;
182 struct dns_request *req, *resp;
185 err = dns_open_connection(server, DNS_UDP, NULL, &conn);
186 if (!ERR_DNS_IS_OK(err)) goto error;
188 err = dns_create_query(conn, host, QTYPE_A, DNS_CLASS_IN, &req);
189 if (!ERR_DNS_IS_OK(err)) goto error;
191 err = dns_transaction(conn, conn, req, &resp);
198 #endif /* defined(WITH_DNS_UPDATES) */