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) */