1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
Unix SMB/CIFS implementation.
DNS server utils
Copyright (C) 2010 Kai Blin <kai@samba.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "libcli/util/ntstatus.h"
#include "libcli/util/werror.h"
#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_dns.h"
#include "librpc/gen_ndr/ndr_dnsp.h"
#include <ldb.h>
#include "dsdb/samdb/samdb.h"
#include "dsdb/common/util.h"
#include "dns_server/dns_server.h"
uint8_t werr_to_dns_err(WERROR werr)
{
if (W_ERROR_EQUAL(WERR_OK, werr)) {
return DNS_RCODE_OK;
} else if (W_ERROR_EQUAL(DNS_ERR(FORMAT_ERROR), werr)) {
return DNS_RCODE_FORMERR;
} else if (W_ERROR_EQUAL(DNS_ERR(SERVER_FAILURE), werr)) {
return DNS_RCODE_SERVFAIL;
} else if (W_ERROR_EQUAL(DNS_ERR(NAME_ERROR), werr)) {
return DNS_RCODE_NXDOMAIN;
} else if (W_ERROR_EQUAL(DNS_ERR(NOT_IMPLEMENTED), werr)) {
return DNS_RCODE_NOTIMP;
} else if (W_ERROR_EQUAL(DNS_ERR(REFUSED), werr)) {
return DNS_RCODE_REFUSED;
} else if (W_ERROR_EQUAL(DNS_ERR(YXDOMAIN), werr)) {
return DNS_RCODE_YXDOMAIN;
} else if (W_ERROR_EQUAL(DNS_ERR(YXRRSET), werr)) {
return DNS_RCODE_YXRRSET;
} else if (W_ERROR_EQUAL(DNS_ERR(NXRRSET), werr)) {
return DNS_RCODE_NXRRSET;
} else if (W_ERROR_EQUAL(DNS_ERR(NOTAUTH), werr)) {
return DNS_RCODE_NOTAUTH;
} else if (W_ERROR_EQUAL(DNS_ERR(NOTZONE), werr)) {
return DNS_RCODE_NOTZONE;
}
DEBUG(5, ("No mapping exists for %%s\n"));
return DNS_RCODE_SERVFAIL;
}
bool dns_name_match(const char *zone, const char *name, size_t *host_part_len)
{
size_t zl = strlen(zone);
size_t nl = strlen(name);
ssize_t zi, ni;
static const size_t fixup = 'a' - 'A';
if (zl > nl) {
return false;
}
for (zi = zl, ni = nl; zi >= 0; zi--, ni--) {
char zc = zone[zi];
char nc = name[ni];
/* convert to lower case */
if (zc >= 'A' && zc <= 'Z') {
zc += fixup;
}
if (nc >= 'A' && nc <= 'Z') {
nc += fixup;
}
if (zc != nc) {
return false;
}
}
if (ni >= 0) {
if (name[ni] != '.') {
return false;
}
ni--;
}
*host_part_len = ni+1;
return true;
}
WERROR dns_name2dn(struct dns_server *dns,
TALLOC_CTX *mem_ctx,
const char *name,
struct ldb_dn **_dn)
{
struct ldb_dn *base;
struct ldb_dn *dn;
const struct dns_server_zone *z;
size_t host_part_len = 0;
if (name == NULL) {
return DNS_ERR(FORMAT_ERROR);
}
/*TODO: Check if 'name' is a valid DNS name */
if (strcmp(name, "") == 0) {
base = ldb_get_default_basedn(dns->samdb);
dn = ldb_dn_copy(mem_ctx, base);
ldb_dn_add_child_fmt(dn, "DC=@,DC=RootDNSServers,CN=MicrosoftDNS,CN=System");
*_dn = dn;
return WERR_OK;
}
for (z = dns->zones; z != NULL; z = z->next) {
bool match;
match = dns_name_match(z->name, name, &host_part_len);
if (match) {
break;
}
}
if (z == NULL) {
return DNS_ERR(NAME_ERROR);
}
if (host_part_len == 0) {
dn = ldb_dn_copy(mem_ctx, z->dn);
ldb_dn_add_child_fmt(dn, "DC=@");
*_dn = dn;
return WERR_OK;
}
dn = ldb_dn_copy(mem_ctx, z->dn);
ldb_dn_add_child_fmt(dn, "DC=%*.*s", (int)host_part_len, (int)host_part_len, name);
*_dn = dn;
return WERR_OK;
}
|
