routing_table.cc revision 536820ddd33f63e1d95e6e04e1757bd0248bbe38
12c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal// Copyright (c) 2012 The Chromium OS Authors. All rights reserved. 275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart// Use of this source code is governed by a BSD-style license that can be 375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart// found in the LICENSE file. 475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/routing_table.h" 675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <arpa/inet.h> 875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <fcntl.h> 975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <linux/netlink.h> 1075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <linux/rtnetlink.h> 1175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <netinet/ether.h> 1275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <net/if.h> 1375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <net/if_arp.h> 1475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <string.h> 1575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <sys/socket.h> 1675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <time.h> 1775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <unistd.h> 1875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <string> 2075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 213e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood#include <base/bind.h> 2275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/file_path.h> 2375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/file_util.h> 2475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/hash_tables.h> 2575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/logging.h> 2675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/memory/scoped_ptr.h> 273e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood#include <base/stl_util.h> 2875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <base/stringprintf.h> 2975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 3075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/byte_string.h" 3175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/routing_table_entry.h" 3275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/rtnl_handler.h" 3375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/rtnl_listener.h" 3475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/rtnl_message.h" 3575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 363e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbroodusing base::Bind; 373e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbroodusing base::Unretained; 3875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartusing std::string; 3975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartusing std::vector; 4075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 4175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartnamespace shill { 4275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 433e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood// TODO(ers): not using LAZY_INSTANCE_INITIALIZER 443e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood// because of http://crbug.com/114828 453e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbroodstatic base::LazyInstance<RoutingTable> g_routing_table = {0, {{0}}}; 460d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart 4775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart// static 4875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartconst char RoutingTable::kRouteFlushPath4[] = "/proc/sys/net/ipv4/route/flush"; 490d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart// static 5075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartconst char RoutingTable::kRouteFlushPath6[] = "/proc/sys/net/ipv6/route/flush"; 5175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 5275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable::RoutingTable() 533e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood : route_callback_(Bind(&RoutingTable::RouteMsgHandler, Unretained(this))), 54f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart route_listener_(NULL), 55f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart rtnl_handler_(RTNLHandler::GetInstance()) { 5675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart VLOG(2) << __func__; 5775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 5875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 5975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable::~RoutingTable() {} 6075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 6175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable* RoutingTable::GetInstance() { 620d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart return g_routing_table.Pointer(); 6375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 6475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 6575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::Start() { 6675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart VLOG(2) << __func__; 6775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 6875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart route_listener_.reset( 693e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood new RTNLListener(RTNLHandler::kRequestRoute, route_callback_)); 70f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart rtnl_handler_->RequestDump(RTNLHandler::kRequestRoute); 7175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 7275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::Stop() { 7475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart VLOG(2) << __func__; 7575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart route_listener_.reset(); 7775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 7875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::AddRoute(int interface_index, 8075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart const RoutingTableEntry &entry) { 81f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << ": " 82f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << "destination " << entry.dst.ToString() 83f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " index " << interface_index 84f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " gateway " << entry.gateway.ToString() 85f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " metric " << entry.metric; 8675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 8775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart CHECK(!entry.from_rtnl); 8875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!ApplyRoute(interface_index, 8975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry, 909a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kModeAdd, 9175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart NLM_F_CREATE | NLM_F_EXCL)) { 9275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 9375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 9475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_[interface_index].push_back(entry); 9575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 9675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 9775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 9875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::GetDefaultRoute(int interface_index, 9975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart IPAddress::Family family, 10075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RoutingTableEntry *entry) { 101d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry *found_entry; 102d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal bool ret = GetDefaultRouteInternal(interface_index, family, &found_entry); 103d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (ret) { 104d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *entry = *found_entry; 105d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal } 106d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal return ret; 107d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal} 108d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal 109d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawalbool RoutingTable::GetDefaultRouteInternal(int interface_index, 110d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal IPAddress::Family family, 111d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry **entry) { 112f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << " index " << interface_index 113f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " family " << IPAddress::GetAddressFamilyName(family); 11475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 11575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart base::hash_map<int, vector<RoutingTableEntry> >::iterator table = 11675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_.find(interface_index); 11775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 11875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (table == tables_.end()) { 1192c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal VLOG(2) << __func__ << " no table"; 12075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 12175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 12275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 12375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart vector<RoutingTableEntry>::iterator nent; 12475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 12575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart for (nent = table->second.begin(); nent != table->second.end(); ++nent) { 12675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (nent->dst.IsDefault() && nent->dst.family() == family) { 127d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *entry = &(*nent); 128f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << ": found" 129f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " gateway " << nent->gateway.ToString() 130f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " metric " << nent->metric; 13175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 13275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 13375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 13475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1352c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal VLOG(2) << __func__ << " no route"; 13675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 13775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 13875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 13975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::SetDefaultRoute(int interface_index, 14075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart const IPConfigRefPtr &ipconfig, 14175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart uint32 metric) { 1422c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal VLOG(2) << __func__ << " index " << interface_index << " metric " << metric; 1432c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal 14475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart const IPConfig::Properties &ipconfig_props = ipconfig->properties(); 145d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry *old_entry; 14675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart IPAddress gateway_address(ipconfig_props.address_family); 14775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!gateway_address.SetAddressFromString(ipconfig_props.gateway)) { 14875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 14975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 15075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 151d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal(interface_index, 152d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal ipconfig_props.address_family, 153d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal &old_entry)) { 154d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (old_entry->gateway.Equals(gateway_address)) { 155d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (old_entry->metric != metric) { 156c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, old_entry, metric); 15775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 15875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 15975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } else { 160d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal // TODO(quiche): Update internal state as well? 16175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ApplyRoute(interface_index, 162d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *old_entry, 1639a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kModeDelete, 16475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0); 16575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 16675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 16775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 16875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart IPAddress default_address(ipconfig_props.address_family); 16975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_address.SetAddressToDefault(); 17075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 17175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return AddRoute(interface_index, 17275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RoutingTableEntry(default_address, 17375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_address, 17475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart gateway_address, 17575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart metric, 17675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RT_SCOPE_UNIVERSE, 17775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart false)); 17875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 17975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1803f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewartbool RoutingTable::ConfigureRoutes(int interface_index, 1813f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart const IPConfigRefPtr &ipconfig, 1823f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart uint32 metric) { 1833f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart bool ret = true; 1843f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 1853f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress::Family address_family = ipconfig->properties().address_family; 1863f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart const vector<IPConfig::Route> &routes = ipconfig->properties().routes; 1873f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 1883f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart for (vector<IPConfig::Route>::const_iterator it = routes.begin(); 1893f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart it != routes.end(); 1903f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ++it) { 1913f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart VLOG(3) << "Installing route:" 1923f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart << " Destination: " << it->host 1933f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart << " Netmask: " << it->netmask 1943f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart << " Gateway: " << it->gateway; 1953f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress destination_address(address_family); 1963f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress source_address(address_family); // Left as default. 1973f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress gateway_address(address_family); 1983f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart if (!destination_address.SetAddressFromString(it->host)) { 1993f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart LOG(ERROR) << "Failed to parse host " 2003f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart << it->host; 2013f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2023f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart continue; 2033f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2043f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart if (!gateway_address.SetAddressFromString(it->gateway)) { 2053f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart LOG(ERROR) << "Failed to parse gateway " 2063f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart << it->gateway; 2073f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2083f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart continue; 2093f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2103f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart destination_address.set_prefix( 2113f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress::GetPrefixLengthFromMask(address_family, it->netmask)); 2123f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart if (!AddRoute(interface_index, 2133f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart RoutingTableEntry(destination_address, 2143f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart source_address, 2153f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart gateway_address, 2163f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart metric, 2173f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart RT_SCOPE_UNIVERSE, 2183f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart false))) { 2193f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2203f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2213f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2223f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart return ret; 2233f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart} 2243f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 225fb46caf4f23a41e73dfd87547121b5fb0230295aThieu Levoid RoutingTable::FlushRoutes(int interface_index) { 22675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart VLOG(2) << __func__; 22775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 22875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart base::hash_map<int, vector<RoutingTableEntry> >::iterator table = 22975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_.find(interface_index); 23075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 23175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (table == tables_.end()) { 23275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return; 23375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 23475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 23575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart vector<RoutingTableEntry>::iterator nent; 23675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 23775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart for (nent = table->second.begin(); nent != table->second.end(); ++nent) { 238caef8936381e9ae1fd765866e4759d42bbb19ad9Thieu Le ApplyRoute(interface_index, *nent, RTNLMessage::kModeDelete, 0); 23975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 240fb46caf4f23a41e73dfd87547121b5fb0230295aThieu Le table->second.clear(); 24175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 24275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 24375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::ResetTable(int interface_index) { 24475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_.erase(interface_index); 24575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 24675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 24775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::SetDefaultMetric(int interface_index, uint32 metric) { 248f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << " index " << interface_index << " metric " << metric; 24975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 250d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry *entry; 251d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal( 252d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal interface_index, IPAddress::kFamilyIPv4, &entry) && 253d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal entry->metric != metric) { 254c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, entry, metric); 25575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 25675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 257d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal( 258d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal interface_index, IPAddress::kFamilyIPv6, &entry) && 259d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal entry->metric != metric) { 260c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, entry, metric); 26175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 26275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 26375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 264f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart// static 265f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewartbool RoutingTable::ParseRoutingTableMessage(const RTNLMessage &message, 266f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart int *interface_index, 267f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RoutingTableEntry *entry) { 268f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.type() != RTNLMessage::kTypeRoute || 269f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.family() == IPAddress::kFamilyUnknown || 270f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart !message.HasAttribute(RTA_OIF)) { 271f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 27275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 27375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 274f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart const RTNLMessage::RouteStatus &route_status = message.route_status(); 27575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 27675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (route_status.type != RTN_UNICAST || 27775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart route_status.table != RT_TABLE_MAIN) { 278f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 27975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 28075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 281f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart uint32 interface_index_u32 = 0; 282f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!message.GetAttribute(RTA_OIF).ConvertToCPUUInt32(&interface_index_u32)) { 283f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 28475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 285f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart *interface_index = interface_index_u32; 28675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 28775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart uint32 metric = 0; 288f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_PRIORITY)) { 289f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.GetAttribute(RTA_PRIORITY).ConvertToCPUUInt32(&metric); 29075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 29175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 292f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart IPAddress default_addr(message.family()); 29375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_addr.SetAddressToDefault(); 29475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 29575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString dst_bytes(default_addr.address()); 296f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_DST)) { 297f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart dst_bytes = message.GetAttribute(RTA_DST); 29875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 29975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString src_bytes(default_addr.address()); 300f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_SRC)) { 301f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart src_bytes = message.GetAttribute(RTA_SRC); 30275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 30375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString gateway_bytes(default_addr.address()); 304f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_GATEWAY)) { 305f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart gateway_bytes = message.GetAttribute(RTA_GATEWAY); 306f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 307f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 308f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->dst = IPAddress(message.family(), dst_bytes, route_status.dst_prefix); 309f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->src = IPAddress(message.family(), src_bytes, route_status.src_prefix); 310f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->gateway = IPAddress(message.family(), gateway_bytes); 311f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->metric = metric; 312f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->scope = route_status.scope; 313f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->from_rtnl = true; 314f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 315f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return true; 316f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart} 317f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 318f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewartvoid RoutingTable::RouteMsgHandler(const RTNLMessage &message) { 319f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart int interface_index; 320f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RoutingTableEntry entry; 321f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 322f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!ParseRoutingTableMessage(message, &interface_index, &entry)) { 323f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 32475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 32575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 326f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!route_query_sequences_.empty() && 327f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.route_status().protocol == RTPROT_UNSPEC) { 328f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(3) << __func__ << ": Message seq: " << message.seq() 329f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " mode " << message.mode() 330f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << ", next query seq: " << route_query_sequences_.front(); 331f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 332f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Purge queries that have expired (sequence number of this message is 333f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // greater than that of the head of the route query sequence). Do the 334f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // math in a way that's roll-over independent. 335f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart while (route_query_sequences_.front() - message.seq() > kuint32max / 2) { 336f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart LOG(ERROR) << __func__ << ": Purging un-replied route request sequence " 337f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << route_query_sequences_.front() 338f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " (< " << message.seq() << ")"; 339f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart route_query_sequences_.pop(); 340f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (route_query_sequences_.empty()) 341f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 342f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 343f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 344f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (route_query_sequences_.front() == message.seq()) { 345f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << ": Adding host route to " << entry.dst.ToString(); 346f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart route_query_sequences_.pop(); 347f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RoutingTableEntry add_entry(entry); 348f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart add_entry.from_rtnl = false; 349f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart AddRoute(interface_index, add_entry); 350f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 351f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 352f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } else if (message.route_status().protocol != RTPROT_BOOT) { 353f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Responses to route queries come back with a protocol of 354f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // RTPROT_UNSPEC. Otherwise, normal route updates that we are 355f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // interested in come with a protocol of RTPROT_BOOT. 356f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 357f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 35875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 35975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart vector<RoutingTableEntry> &table = tables_[interface_index]; 36075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart vector<RoutingTableEntry>::iterator nent; 36175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart for (nent = table.begin(); nent != table.end(); ++nent) { 36275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (nent->dst.Equals(entry.dst) && 36375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->src.Equals(entry.src) && 36475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->gateway.Equals(entry.gateway) && 36575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->scope == entry.scope) { 366f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.mode() == RTNLMessage::kModeDelete && 367c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart nent->metric == entry.metric) { 36875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart table.erase(nent); 369f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } else if (message.mode() == RTNLMessage::kModeAdd) { 37075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->from_rtnl = true; 37175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->metric = entry.metric; 37275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 37375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return; 37475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 37575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 37675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 377f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.mode() == RTNLMessage::kModeAdd) { 378f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << " adding" 379f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " destination " << entry.dst.ToString() 380f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " index " << interface_index 381f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " gateway " << entry.gateway.ToString() 382f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " metric " << entry.metric; 38375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart table.push_back(entry); 38475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 38575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 38675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 38775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::ApplyRoute(uint32 interface_index, 38875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart const RoutingTableEntry &entry, 3899a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::Mode mode, 39075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart unsigned int flags) { 3913f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart VLOG(2) << base::StringPrintf("%s: dst %s/%d src %s/%d index %d mode %d " 3923f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart "flags 0x%x", 393bf14e94cbd47d6320eec846f1ca4def026840e14mukesh agrawal __func__, entry.dst.ToString().c_str(), 3943f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart entry.dst.prefix(), 3953f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart entry.src.ToString().c_str(), 3963f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart entry.src.prefix(), interface_index, mode, 3973f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart flags); 39875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 399f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage message( 4009a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kTypeRoute, 40175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart mode, 402e613202d36e3bfb06a40eea1888694413210ef7ePaul Stewart NLM_F_REQUEST | flags, 40375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 40475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 40575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 40675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry.dst.family()); 40775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 408f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.set_route_status(RTNLMessage::RouteStatus( 4099e3fcd7141240bc5efd0bf1513b9e78aa79d90ebPaul Stewart entry.dst.prefix(), 4109e3fcd7141240bc5efd0bf1513b9e78aa79d90ebPaul Stewart entry.src.prefix(), 41175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RT_TABLE_MAIN, 41275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RTPROT_BOOT, 41375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry.scope, 41475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RTN_UNICAST, 41575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0)); 41675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 417f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_DST, entry.dst.address()); 41875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!entry.src.IsDefault()) { 419f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_SRC, entry.src.address()); 42075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 42175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!entry.gateway.IsDefault()) { 422f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_GATEWAY, entry.gateway.address()); 42375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 424f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_PRIORITY, 425f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart ByteString::CreateFromCPUUInt32(entry.metric)); 426f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_OIF, 427f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart ByteString::CreateFromCPUUInt32(interface_index)); 42875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 429f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return rtnl_handler_->SendMessage(&message); 43075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 43175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 432c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// Somewhat surprisingly, the kernel allows you to create multiple routes 433c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// to the same destination through the same interface with different metrics. 434c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// Therefore, to change the metric on a route, we can't just use the 435c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// NLM_F_REPLACE flag by itself. We have to explicitly remove the old route. 436c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// We do so after creating the route at a new metric so there is no traffic 437c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// disruption to existing network streams. 438c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewartvoid RoutingTable::ReplaceMetric(uint32 interface_index, 439d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry *entry, 440c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart uint32 metric) { 441f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart VLOG(2) << __func__ << " index " << interface_index << " metric " << metric; 442d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry new_entry = *entry; 443c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart new_entry.metric = metric; 444c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart // First create the route at the new metric. 445c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ApplyRoute(interface_index, new_entry, RTNLMessage::kModeAdd, 446c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart NLM_F_CREATE | NLM_F_REPLACE); 447c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart // Then delete the route at the old metric. 448d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal ApplyRoute(interface_index, *entry, RTNLMessage::kModeDelete, 0); 449d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal // Now, update our routing table (via |*entry|) from |new_entry|. 450d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *entry = new_entry; 451c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart} 452c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart 45375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::FlushCache() { 45475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart static const char *kPaths[2] = { kRouteFlushPath4, kRouteFlushPath6 }; 45575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart bool ret = true; 45675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 45775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart VLOG(2) << __func__; 45875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 45975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart for (size_t i = 0; i < arraysize(kPaths); ++i) { 46075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (file_util::WriteFile(FilePath(kPaths[i]), "-1", 2) != 2) { 46175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart LOG(ERROR) << base::StringPrintf("Cannot write to route flush file %s", 46275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart kPaths[i]); 46375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ret = false; 46475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 46575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 46675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 46775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return ret; 46875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 46975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 470f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewartbool RoutingTable::RequestRouteToHost(const IPAddress &address, 471f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart int interface_index) { 472f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage message( 473f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::kTypeRoute, 474f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::kModeQuery, 475f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart NLM_F_REQUEST, 476f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 0, 477f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 0, 478f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart interface_index, 479f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart address.family()); 480f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 481f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::RouteStatus status; 482f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart status.dst_prefix = address.prefix(); 483f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.set_route_status(status); 484f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_DST, address.address()); 485536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart 486536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart if (interface_index != -1) { 487536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart message.SetAttribute(RTA_OIF, 488536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart ByteString::CreateFromCPUUInt32(interface_index)); 489536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart } 490f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 491f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!rtnl_handler_->SendMessage(&message)) { 492f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 493f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 494f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 495f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Save the sequence number of the request so we can create a route for 496f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // this host when we get a reply. 497f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart route_query_sequences_.push(message.seq()); 498f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 499f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return true; 500f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart} 501f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 50275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} // namespace shill 503