Paul Stewart | 75e89d2 | 2011-08-01 10:00:02 -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 | #ifndef SHILL_ROUTING_TABLE_ |
| 6 | #define SHILL_ROUTING_TABLE_ |
| 7 | |
| 8 | #include <string> |
| 9 | |
| 10 | #include <base/callback_old.h> |
| 11 | #include <base/hash_tables.h> |
| 12 | #include <base/memory/ref_counted.h> |
| 13 | #include <base/memory/singleton.h> |
| 14 | #include <base/memory/scoped_ptr.h> |
| 15 | |
| 16 | #include "shill/ip_address.h" |
| 17 | #include "shill/refptr_types.h" |
| 18 | #include "shill/rtnl_message.h" |
| 19 | |
| 20 | struct nlmsghdr; |
| 21 | |
| 22 | namespace shill { |
| 23 | |
| 24 | class RoutingTableEntry; |
| 25 | class RTNLListener; |
| 26 | |
| 27 | // This singleton maintains an in-process copy of the routing table on |
| 28 | // a per-interface basis. It offers the ability for other modules to |
| 29 | // make modifications to the routing table, centered around setting the |
| 30 | // default route for an interface or modifying its metric (priority). |
| 31 | class RoutingTable { |
| 32 | public: |
| 33 | // Since this is a singleton, use RoutingTable::GetInstance()->Foo() |
| 34 | static RoutingTable *GetInstance(); |
| 35 | |
| 36 | void Start(); |
| 37 | void Stop(); |
| 38 | |
| 39 | // Add an entry to the routing table |
| 40 | bool AddRoute(int interface_index, const RoutingTableEntry &entry); |
| 41 | |
| 42 | // Get the default route associated with an interface of a given addr family |
| 43 | bool GetDefaultRoute(int interface_index, |
| 44 | IPAddress::Family family, |
| 45 | RoutingTableEntry *entry); |
| 46 | |
| 47 | // Set the default route for an interface, given an ipconfig entry |
| 48 | bool SetDefaultRoute(int interface_index, |
| 49 | const IPConfigRefPtr &ipconfig, |
| 50 | uint32 metric); |
| 51 | |
| 52 | // Remove all routes associated with interface |
| 53 | void FlushRoutes(int interface_index); |
| 54 | |
| 55 | // Reset local state for this interface |
| 56 | void ResetTable(int interface_index); |
| 57 | |
| 58 | // Set the metric (priority) on existing default routes for an interface |
| 59 | void SetDefaultMetric(int interface_index, uint32 metric); |
| 60 | |
| 61 | private: |
| 62 | friend struct DefaultSingletonTraits<RoutingTable>; |
| 63 | friend class RoutingTableTest; |
| 64 | |
| 65 | // Constructor and destructor are private since this is a singleton |
| 66 | RoutingTable(); |
| 67 | ~RoutingTable(); |
| 68 | |
| 69 | void RouteMsgHandler(struct nlmsghdr *hdr); |
| 70 | bool ApplyRoute(uint32 interface_index, |
| 71 | const RoutingTableEntry &entry, |
| 72 | RTNLMessage::MessageMode mode, |
| 73 | unsigned int flags); |
| 74 | bool FlushCache(); |
| 75 | |
| 76 | static const char kRouteFlushPath4[]; |
| 77 | static const char kRouteFlushPath6[]; |
| 78 | |
| 79 | base::hash_map<int, std::vector<RoutingTableEntry> > tables_; |
| 80 | scoped_ptr<Callback1<struct nlmsghdr *>::Type> route_callback_; |
| 81 | scoped_ptr<RTNLListener> route_listener_; |
| 82 | |
| 83 | DISALLOW_COPY_AND_ASSIGN(RoutingTable); |
| 84 | }; |
| 85 | |
| 86 | } // namespace shill |
| 87 | |
| 88 | #endif // SHILL_ROUTING_TABLE_ |