Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "shill/resolver.h" |
| 6 | |
| 7 | #include <string> |
| 8 | #include <vector> |
| 9 | |
| 10 | #include <base/file_util.h> |
| 11 | #include <base/string_util.h> |
| 12 | #include <base/stringprintf.h> |
| 13 | |
| 14 | #include "shill/ipconfig.h" |
| 15 | |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 16 | using base::StringPrintf; |
| 17 | using std::string; |
| 18 | using std::vector; |
| 19 | |
Paul Stewart | 0d2ada3 | 2011-08-09 17:01:57 -0700 | [diff] [blame] | 20 | namespace shill { |
| 21 | |
| 22 | static base::LazyInstance<Resolver> g_resolver( |
| 23 | base::LINKER_INITIALIZED); |
| 24 | |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 25 | Resolver::Resolver() {} |
| 26 | |
| 27 | Resolver::~Resolver() {} |
| 28 | |
| 29 | Resolver* Resolver::GetInstance() { |
Paul Stewart | 0d2ada3 | 2011-08-09 17:01:57 -0700 | [diff] [blame] | 30 | return g_resolver.Pointer(); |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 31 | } |
| 32 | |
Paul Stewart | dd60e45 | 2011-08-08 11:38:36 -0700 | [diff] [blame] | 33 | bool Resolver::SetDNSFromIPConfig(const IPConfigRefPtr &ipconfig) { |
Paul Stewart | e613202 | 2011-08-16 09:11:02 -0700 | [diff] [blame] | 34 | VLOG(2) << __func__; |
| 35 | |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 36 | CHECK(!path_.empty()); |
| 37 | |
| 38 | const IPConfig::Properties &props = ipconfig->properties(); |
| 39 | |
Paul Stewart | dd60e45 | 2011-08-08 11:38:36 -0700 | [diff] [blame] | 40 | return SetDNSFromLists(props.dns_servers, props.domain_search); |
| 41 | } |
| 42 | |
| 43 | bool Resolver::SetDNSFromLists(const std::vector<std::string> &dns_servers, |
| 44 | const std::vector<std::string> &domain_search) { |
Paul Stewart | e613202 | 2011-08-16 09:11:02 -0700 | [diff] [blame] | 45 | VLOG(2) << __func__; |
| 46 | |
Paul Stewart | dd60e45 | 2011-08-08 11:38:36 -0700 | [diff] [blame] | 47 | if (dns_servers.empty() && domain_search.empty()) { |
Paul Stewart | e613202 | 2011-08-16 09:11:02 -0700 | [diff] [blame] | 48 | VLOG(2) << "DNS list is empty"; |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 49 | return ClearDNS(); |
| 50 | } |
| 51 | |
| 52 | vector<string> lines; |
| 53 | vector<string>::const_iterator iter; |
Paul Stewart | dd60e45 | 2011-08-08 11:38:36 -0700 | [diff] [blame] | 54 | for (iter = dns_servers.begin(); |
| 55 | iter != dns_servers.end(); ++iter) { |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 56 | lines.push_back("nameserver " + *iter); |
| 57 | } |
| 58 | |
Paul Stewart | dd60e45 | 2011-08-08 11:38:36 -0700 | [diff] [blame] | 59 | if (!domain_search.empty()) { |
| 60 | lines.push_back("search " + JoinString(domain_search, ' ')); |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | // Newline at end of file |
| 64 | lines.push_back(""); |
| 65 | |
| 66 | string contents = JoinString(lines, '\n'); |
Paul Stewart | e613202 | 2011-08-16 09:11:02 -0700 | [diff] [blame] | 67 | |
| 68 | VLOG(2) << "Writing DNS out to " << path_.value(); |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 69 | int count = file_util::WriteFile(path_, contents.c_str(), contents.size()); |
| 70 | |
| 71 | return count == static_cast<int>(contents.size()); |
| 72 | } |
| 73 | |
| 74 | bool Resolver::ClearDNS() { |
Paul Stewart | e613202 | 2011-08-16 09:11:02 -0700 | [diff] [blame] | 75 | VLOG(2) << __func__; |
| 76 | |
Paul Stewart | b606394 | 2011-08-05 10:17:29 -0700 | [diff] [blame] | 77 | CHECK(!path_.empty()); |
| 78 | |
| 79 | return file_util::Delete(path_, false); |
| 80 | } |
| 81 | |
| 82 | } // namespace shill |