diff options
Diffstat (limited to 'source4/dns_server/dns_utils.c')
| -rw-r--r-- | source4/dns_server/dns_utils.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/source4/dns_server/dns_utils.c b/source4/dns_server/dns_utils.c new file mode 100644 index 0000000000..2c86f0d52e --- /dev/null +++ b/source4/dns_server/dns_utils.c @@ -0,0 +1,156 @@ +/* + 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 "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" + +NTSTATUS dns_err_to_ntstatus(enum dns_rcode rcode) +{ + switch (rcode) { + case DNS_RCODE_OK: return NT_STATUS_OK; + case DNS_RCODE_FORMERR: return NT_STATUS_INVALID_PARAMETER; + case DNS_RCODE_SERVFAIL: return NT_STATUS_INTERNAL_ERROR; + case DNS_RCODE_NXDOMAIN: return NT_STATUS_OBJECT_NAME_NOT_FOUND; + case DNS_RCODE_NOTIMP: return NT_STATUS_NOT_IMPLEMENTED; + case DNS_RCODE_REFUSED: return NT_STATUS_ACCESS_DENIED; + case DNS_RCODE_NOTAUTH: return NT_STATUS_FOOBAR; + default: return NT_STATUS_NONE_MAPPED; + } +} + +uint8_t ntstatus_to_dns_err(NTSTATUS status) +{ + if (NT_STATUS_EQUAL(NT_STATUS_OK, status)) { + return DNS_RCODE_OK; + } else if (NT_STATUS_EQUAL(NT_STATUS_INVALID_PARAMETER, status)) { + return DNS_RCODE_FORMERR; + } else if (NT_STATUS_EQUAL(NT_STATUS_INTERNAL_ERROR, status)) { + return DNS_RCODE_SERVFAIL; + } else if (NT_STATUS_EQUAL(NT_STATUS_OBJECT_NAME_NOT_FOUND, status)) { + return DNS_RCODE_NXDOMAIN; + } else if (NT_STATUS_EQUAL(NT_STATUS_NOT_IMPLEMENTED, status)) { + return DNS_RCODE_NOTIMP; + } else if (NT_STATUS_EQUAL(NT_STATUS_ACCESS_DENIED, status)) { + return DNS_RCODE_REFUSED; + } else if (NT_STATUS_EQUAL(NT_STATUS_FOOBAR, status)) { + return DNS_RCODE_NOTAUTH; + } + DEBUG(0, ("No mapping exists for %s\n", nt_errstr(status))); + return DNS_RCODE_NOTIMP; +} + +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; +} + +NTSTATUS 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 NT_STATUS_INVALID_PARAMETER; + } + + /*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 NT_STATUS_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 NT_STATUS_OBJECT_NAME_NOT_FOUND; + } + + if (host_part_len == 0) { + dn = ldb_dn_copy(mem_ctx, z->dn); + ldb_dn_add_child_fmt(dn, "DC=@"); + *_dn = dn; + return NT_STATUS_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 NT_STATUS_OK; +} |