shill: Add connection class
The connection class represents the snapshot of connectivity
state, including routing, address information and addressing.
It is able to apply itself as the "default" connection, by
setting routing table metrics and DNS resolver files.
BUG=chromium-os:19095
TEST=New unittest
Change-Id: I7021867ed8a8559db0e84f58a72692abaf105cad
Reviewed-on: http://gerrit.chromium.org/gerrit/5938
Reviewed-by: Chris Masone <cmasone@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>
diff --git a/connection.cc b/connection.cc
new file mode 100644
index 0000000..5ca7d86
--- /dev/null
+++ b/connection.cc
@@ -0,0 +1,70 @@
+// Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "shill/connection.h"
+
+#include "shill/resolver.h"
+#include "shill/routing_table.h"
+#include "shill/rtnl_handler.h"
+
+using std::string;
+
+namespace shill {
+
+// static
+const uint32 Connection::kDefaultMetric = 1;
+// static
+const uint32 Connection::kNonDefaultMetric = 10;
+
+Connection::Connection(int interface_index, const std::string& interface_name)
+ : is_default_(false),
+ interface_index_(interface_index),
+ interface_name_(interface_name),
+ resolver_(Resolver::GetInstance()),
+ routing_table_(RoutingTable::GetInstance()),
+ rtnl_handler_(RTNLHandler::GetInstance()) {
+ VLOG(2) << __func__;
+}
+
+Connection::~Connection() {
+ routing_table_->FlushRoutes(interface_index_);
+ // TODO(pstew): Also flush all addresses when DeviceInfo starts tracking them
+ VLOG(2) << __func__;
+}
+
+void Connection::UpdateFromIPConfig(const IPConfigRefPtr &config) {
+ VLOG(2) << __func__;
+ rtnl_handler_->AddInterfaceAddress(interface_index_, *config);
+
+ uint32 metric = is_default_ ? kDefaultMetric : kNonDefaultMetric;
+ routing_table_->SetDefaultRoute(interface_index_, config, metric);
+
+ // Save a copy of the last non-null DNS config
+ if (!config->properties().dns_servers.empty()) {
+ dns_servers_ = config->properties().dns_servers;
+ dns_domain_search_ = config->properties().domain_search;
+ }
+
+ if (is_default_) {
+ resolver_->SetDNSFromIPConfig(config);
+ }
+}
+
+void Connection::SetDefault(bool is_default) {
+ VLOG(2) << __func__;
+ if (is_default == is_default_) {
+ return;
+ }
+
+ routing_table_->SetDefaultMetric(interface_index_,
+ is_default ? kDefaultMetric : kNonDefaultMetric);
+
+ if (is_default) {
+ resolver_->SetDNSFromLists(dns_servers_, dns_domain_search_);
+ }
+
+ is_default_ = is_default;
+}
+
+} // namespace shill