routing_table.cc revision 1a212a6b98b22ad1d69652bb26a9e94138635476
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> 12a41ab517725d036b63420f8445550246f8f50b99Alex Vakulenko#include <net/if.h> // NOLINT - must be included after netinet/ether.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 19cd47732488cd101eaf0d3558dde5a7d4e4fc260bBen Chan#include <memory> 2075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include <string> 2175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 223e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood#include <base/bind.h> 23a0ddf46e466bd4ba3d20952f0a6988c680c1af14Ben Chan#include <base/files/file_path.h> 2411c213f3cf64f27a0e42ee6da95e98bd1d4b3202Ben Chan#include <base/files/file_util.h> 253e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood#include <base/stl_util.h> 26a0ddf46e466bd4ba3d20952f0a6988c680c1af14Ben Chan#include <base/strings/stringprintf.h> 2775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 288d6b59704591ba9fad57751858835dc332dbdd37Peter Qiu#include "shill/ipconfig.h" 29b691efd71561246065eae3cdd73a96ca1b8a528dChristopher Wiley#include "shill/logging.h" 308d6b59704591ba9fad57751858835dc332dbdd37Peter Qiu#include "shill/net/byte_string.h" 318d6b59704591ba9fad57751858835dc332dbdd37Peter Qiu#include "shill/net/rtnl_handler.h" 328d6b59704591ba9fad57751858835dc332dbdd37Peter Qiu#include "shill/net/rtnl_listener.h" 338d6b59704591ba9fad57751858835dc332dbdd37Peter Qiu#include "shill/net/rtnl_message.h" 3475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart#include "shill/routing_table_entry.h" 3575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 363e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbroodusing base::Bind; 370e1cdeae24dd678a5fe27c840802582c0ca45ec0Albert Chaulkusing base::FilePath; 383e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbroodusing base::Unretained; 39abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkovusing std::deque; 4075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartusing std::string; 4175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartusing std::vector; 4275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 4375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartnamespace shill { 4475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 45c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silbersteinnamespace Logging { 46c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silbersteinstatic auto kModuleLogScope = ScopeLogger::kRoute; 471a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewartstatic string ObjectID(RoutingTable* r) { return "(routing_table)"; } 48c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein} 49c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein 50bbdef5fc35b48d9b43ba0dc005384abd36b72213Ben Channamespace { 51bbdef5fc35b48d9b43ba0dc005384abd36b72213Ben Chanbase::LazyInstance<RoutingTable> g_routing_table = LAZY_INSTANCE_INITIALIZER; 52bbdef5fc35b48d9b43ba0dc005384abd36b72213Ben Chan} // namespace 530d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart 5475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart// static 5575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartconst char RoutingTable::kRouteFlushPath4[] = "/proc/sys/net/ipv4/route/flush"; 560d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart// static 5775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartconst char RoutingTable::kRouteFlushPath6[] = "/proc/sys/net/ipv6/route/flush"; 5875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 5975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable::RoutingTable() 603e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood : route_callback_(Bind(&RoutingTable::RouteMsgHandler, Unretained(this))), 61f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart rtnl_handler_(RTNLHandler::GetInstance()) { 62c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 6375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 6475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 6575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable::~RoutingTable() {} 6675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 6775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul StewartRoutingTable* RoutingTable::GetInstance() { 680d2ada3971075e78fb9900d0753c9ad94c15add4Paul Stewart return g_routing_table.Pointer(); 6975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 7075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::Start() { 72c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 7375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart route_listener_.reset( 753e20a2341d0aeb7681e4ee0f89eae6817ade2b3bEric Shienbrood new RTNLListener(RTNLHandler::kRequestRoute, route_callback_)); 76f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart rtnl_handler_->RequestDump(RTNLHandler::kRequestRoute); 7775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 7875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 7975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::Stop() { 80c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 8175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 8275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart route_listener_.reset(); 8375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 8475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 8575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::AddRoute(int interface_index, 861a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const RoutingTableEntry& entry) { 87c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << ": " 88c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << "destination " << entry.dst.ToString() 89c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " index " << interface_index 90c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " gateway " << entry.gateway.ToString() 91c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << entry.metric; 9275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 9375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart CHECK(!entry.from_rtnl); 9475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!ApplyRoute(interface_index, 9575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry, 969a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kModeAdd, 9775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart NLM_F_CREATE | NLM_F_EXCL)) { 9875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 9975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 10075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_[interface_index].push_back(entry); 10175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 10275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 10375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 10475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::GetDefaultRoute(int interface_index, 10575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart IPAddress::Family family, 1061a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* entry) { 1071a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* found_entry; 108d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal bool ret = GetDefaultRouteInternal(interface_index, family, &found_entry); 109d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (ret) { 110d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *entry = *found_entry; 111d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal } 112d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal return ret; 113d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal} 114d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal 115d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawalbool RoutingTable::GetDefaultRouteInternal(int interface_index, 116d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal IPAddress::Family family, 1171a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry** entry) { 118c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " index " << interface_index 119c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " family " << IPAddress::GetAddressFamilyName(family); 12075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1216db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart Tables::iterator table = tables_.find(interface_index); 12275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (table == tables_.end()) { 123c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " no table"; 12475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 12575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 12675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1271a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart for (auto& nent : table->second) { 1286db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart if (nent.dst.IsDefault() && nent.dst.family() == family) { 1296db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart *entry = &nent; 130c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << ": found" 131c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " gateway " << nent.gateway.ToString() 132c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << nent.metric; 13375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 13475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 13575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 13675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 137c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " no route"; 13875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return false; 13975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 14075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 14175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::SetDefaultRoute(int interface_index, 1421a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const IPAddress& gateway_address, 143762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint32_t metric, 144762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint8_t table_id) { 145c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " index " << interface_index 146c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << metric; 1472c15d2c7ae814d95673ea48ec8f4eb582ef3652emukesh agrawal 1481a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* old_entry; 14975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 150d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal(interface_index, 1515b7ba8c2e9e5ab5e67c68d0cde963141beb501d8Paul Stewart gateway_address.family(), 152d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal &old_entry)) { 153d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (old_entry->gateway.Equals(gateway_address)) { 154d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (old_entry->metric != metric) { 155c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, old_entry, metric); 15675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 15775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return true; 15875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } else { 159d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal // TODO(quiche): Update internal state as well? 16075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ApplyRoute(interface_index, 161d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *old_entry, 1629a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kModeDelete, 16375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0); 16475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 16575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 16675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1675b7ba8c2e9e5ab5e67c68d0cde963141beb501d8Paul Stewart IPAddress default_address(gateway_address.family()); 16875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_address.SetAddressToDefault(); 16975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 17075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return AddRoute(interface_index, 17175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RoutingTableEntry(default_address, 17275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_address, 17375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart gateway_address, 17475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart metric, 17575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RT_SCOPE_UNIVERSE, 176762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi false, 177762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi table_id, 178762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi RoutingTableEntry::kDefaultTag)); 17975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 18075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 1813f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewartbool RoutingTable::ConfigureRoutes(int interface_index, 1821a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const IPConfigRefPtr& ipconfig, 183762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint32_t metric, 184762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint8_t table_id) { 1853f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart bool ret = true; 1863f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 1873f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart IPAddress::Family address_family = ipconfig->properties().address_family; 1881a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const vector<IPConfig::Route>& routes = ipconfig->properties().routes; 1893f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 1901a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart for (const auto& route : routes) { 191c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 3) << "Installing route:" 192c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " Destination: " << route.host 193c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " Netmask: " << route.netmask 194c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " Gateway: " << route.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); 1986db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart if (!destination_address.SetAddressFromString(route.host)) { 1993f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart LOG(ERROR) << "Failed to parse host " 2006db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart << route.host; 2013f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2023f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart continue; 2033f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2046db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart if (!gateway_address.SetAddressFromString(route.gateway)) { 2053f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart LOG(ERROR) << "Failed to parse gateway " 2066db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart << route.gateway; 2073f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2083f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart continue; 2093f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2103f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart destination_address.set_prefix( 2116db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart IPAddress::GetPrefixLengthFromMask(address_family, route.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, 218762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi false, 219762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi table_id, 220762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi RoutingTableEntry::kDefaultTag))) { 2213f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart ret = false; 2223f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2233f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart } 2243f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart return ret; 2253f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart} 2263f68bb1e3768969a1db686325ae9a84c8fd06005Paul Stewart 227fb46caf4f23a41e73dfd87547121b5fb0230295aThieu Levoid RoutingTable::FlushRoutes(int interface_index) { 228c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 22975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2306db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart auto table = tables_.find(interface_index); 23175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (table == tables_.end()) { 23275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return; 23375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 23475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2351a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart for (const auto& nent : table->second) { 2366db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart ApplyRoute(interface_index, nent, RTNLMessage::kModeDelete, 0); 23775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 238fb46caf4f23a41e73dfd87547121b5fb0230295aThieu Le table->second.clear(); 23975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 24075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 241e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewartvoid RoutingTable::FlushRoutesWithTag(int tag) { 242c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 243e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart 2441a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart for (auto& table : tables_) { 2456db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart for (auto nent = table.second.begin(); nent != table.second.end();) { 246e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart if (nent->tag == tag) { 2476db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart ApplyRoute(table.first, *nent, RTNLMessage::kModeDelete, 0); 2486db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart nent = table.second.erase(nent); 249e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart } else { 250e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart ++nent; 251e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart } 252e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart } 253e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart } 254e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart} 255e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart 25675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartvoid RoutingTable::ResetTable(int interface_index) { 25775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart tables_.erase(interface_index); 25875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 25975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2607fab89734d88724a288e96a9996b15548c5294c7Ben Chanvoid RoutingTable::SetDefaultMetric(int interface_index, uint32_t metric) { 261c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " index " << interface_index 262c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << metric; 26375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2641a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* entry; 265d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal( 266d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal interface_index, IPAddress::kFamilyIPv4, &entry) && 267d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal entry->metric != metric) { 268c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, entry, metric); 26975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 27075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 271d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal if (GetDefaultRouteInternal( 272d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal interface_index, IPAddress::kFamilyIPv6, &entry) && 273d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal entry->metric != metric) { 274c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ReplaceMetric(interface_index, entry, metric); 27575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 27675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 27775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 278f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart// static 2791a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewartbool RoutingTable::ParseRoutingTableMessage(const RTNLMessage& message, 2801a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart int* interface_index, 2811a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* entry) { 282f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.type() != RTNLMessage::kTypeRoute || 283f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.family() == IPAddress::kFamilyUnknown || 284f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart !message.HasAttribute(RTA_OIF)) { 285f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 28675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 28775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2881a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const RTNLMessage::RouteStatus& route_status = message.route_status(); 28975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 290762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi if (route_status.type != RTN_UNICAST) { 291f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 29275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 29375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 2947fab89734d88724a288e96a9996b15548c5294c7Ben Chan uint32_t interface_index_u32 = 0; 295f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!message.GetAttribute(RTA_OIF).ConvertToCPUUInt32(&interface_index_u32)) { 296f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 29775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 298f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart *interface_index = interface_index_u32; 29975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 3007fab89734d88724a288e96a9996b15548c5294c7Ben Chan uint32_t metric = 0; 301f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_PRIORITY)) { 302f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.GetAttribute(RTA_PRIORITY).ConvertToCPUUInt32(&metric); 30375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 30475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 305f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart IPAddress default_addr(message.family()); 30675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart default_addr.SetAddressToDefault(); 30775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 30875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString dst_bytes(default_addr.address()); 309f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_DST)) { 310f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart dst_bytes = message.GetAttribute(RTA_DST); 31175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 31275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString src_bytes(default_addr.address()); 313f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_SRC)) { 314f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart src_bytes = message.GetAttribute(RTA_SRC); 31575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 31675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ByteString gateway_bytes(default_addr.address()); 317f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.HasAttribute(RTA_GATEWAY)) { 318f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart gateway_bytes = message.GetAttribute(RTA_GATEWAY); 319f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 320f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 321f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->dst = IPAddress(message.family(), dst_bytes, route_status.dst_prefix); 322f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->src = IPAddress(message.family(), src_bytes, route_status.src_prefix); 323f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->gateway = IPAddress(message.family(), gateway_bytes); 324f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->metric = metric; 325f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->scope = route_status.scope; 326f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart entry->from_rtnl = true; 327762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi entry->table = route_status.table; 328f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 329f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return true; 330f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart} 331f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 3321a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewartvoid RoutingTable::RouteMsgHandler(const RTNLMessage& message) { 333f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart int interface_index; 334f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RoutingTableEntry entry; 335f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 336f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!ParseRoutingTableMessage(message, &interface_index, &entry)) { 337f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 33875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 33975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 340e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart if (!route_queries_.empty() && 341f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.route_status().protocol == RTPROT_UNSPEC) { 342c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 3) << __func__ << ": Message seq: " << message.seq() 343c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " mode " << message.mode() 344c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << ", next query seq: " << route_queries_.front().sequence; 345f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 346f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Purge queries that have expired (sequence number of this message is 347f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // greater than that of the head of the route query sequence). Do the 348f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // math in a way that's roll-over independent. 349e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart while (route_queries_.front().sequence - message.seq() > kuint32max / 2) { 350f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart LOG(ERROR) << __func__ << ": Purging un-replied route request sequence " 351e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart << route_queries_.front().sequence 352f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart << " (< " << message.seq() << ")"; 353abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov route_queries_.pop_front(); 354e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart if (route_queries_.empty()) 355f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 356f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 357f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 3581a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const Query& query = route_queries_.front(); 359abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov if (query.sequence == message.seq()) { 360abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov RoutingTableEntry add_entry(entry); 361abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov add_entry.from_rtnl = false; 362abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov add_entry.tag = query.tag; 363762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi add_entry.table = query.table_id; 364abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov bool added = true; 365abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov if (add_entry.gateway.IsDefault()) { 366c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << ": Ignoring route result with no gateway " 367c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << "since we don't need to plumb these."; 368bbed76d275058c8f9a42c5c71efdcc1223617bdcPaul Stewart } else { 369c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << ": Adding host route to " 370c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << add_entry.dst.ToString(); 371abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov added = AddRoute(interface_index, add_entry); 372bbed76d275058c8f9a42c5c71efdcc1223617bdcPaul Stewart } 373abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov if (added && !query.callback.is_null()) { 374c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << "Running query callback."; 375abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov query.callback.Run(interface_index, add_entry); 376abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov } 377abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov route_queries_.pop_front(); 378f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 379f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 380f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } else if (message.route_status().protocol != RTPROT_BOOT) { 381f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Responses to route queries come back with a protocol of 382f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // RTPROT_UNSPEC. Otherwise, normal route updates that we are 383f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // interested in come with a protocol of RTPROT_BOOT. 384f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return; 385f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 38675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 3871a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart TableEntryVector& table = tables_[interface_index]; 3886db7b24348e69639e19cd6c408388b10d6ee54fePaul Stewart for (auto nent = table.begin(); nent != table.end(); ++nent) { 38975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (nent->dst.Equals(entry.dst) && 39075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->src.Equals(entry.src) && 39175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->gateway.Equals(entry.gateway) && 39275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->scope == entry.scope) { 393f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.mode() == RTNLMessage::kModeDelete && 394c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart nent->metric == entry.metric) { 39575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart table.erase(nent); 396f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } else if (message.mode() == RTNLMessage::kModeAdd) { 39775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->from_rtnl = true; 39875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart nent->metric = entry.metric; 39975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 40075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return; 40175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 40275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 40375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 404f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (message.mode() == RTNLMessage::kModeAdd) { 405c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " adding" 406c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " destination " << entry.dst.ToString() 407c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " index " << interface_index 408c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " gateway " << entry.gateway.ToString() 409c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << entry.metric; 41075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart table.push_back(entry); 41175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 41275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 41375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 4147fab89734d88724a288e96a9996b15548c5294c7Ben Chanbool RoutingTable::ApplyRoute(uint32_t interface_index, 4151a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const RoutingTableEntry& entry, 4169a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::Mode mode, 41775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart unsigned int flags) { 418c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << base::StringPrintf( 419fad4a0b7e55dd82d3815ee96862b6e546727eb6eBen Chan "%s: dst %s/%d src %s/%d index %d mode %d flags 0x%x", 420fad4a0b7e55dd82d3815ee96862b6e546727eb6eBen Chan __func__, entry.dst.ToString().c_str(), entry.dst.prefix(), 421fad4a0b7e55dd82d3815ee96862b6e546727eb6eBen Chan entry.src.ToString().c_str(), entry.src.prefix(), 422fad4a0b7e55dd82d3815ee96862b6e546727eb6eBen Chan interface_index, mode, flags); 42375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 424f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage message( 4259a908080fc2a72dbf06f995b878fc8a3693b725aPaul Stewart RTNLMessage::kTypeRoute, 42675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart mode, 427e613202d36e3bfb06a40eea1888694413210ef7ePaul Stewart NLM_F_REQUEST | flags, 42875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 42975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 43075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0, 43175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry.dst.family()); 43275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 433f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.set_route_status(RTNLMessage::RouteStatus( 4349e3fcd7141240bc5efd0bf1513b9e78aa79d90ebPaul Stewart entry.dst.prefix(), 4359e3fcd7141240bc5efd0bf1513b9e78aa79d90ebPaul Stewart entry.src.prefix(), 436762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi entry.table, 43775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RTPROT_BOOT, 43875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart entry.scope, 43975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart RTN_UNICAST, 44075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 0)); 44175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 442f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_DST, entry.dst.address()); 44375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!entry.src.IsDefault()) { 444f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_SRC, entry.src.address()); 44575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 44675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart if (!entry.gateway.IsDefault()) { 447f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_GATEWAY, entry.gateway.address()); 44875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 449f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_PRIORITY, 450f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart ByteString::CreateFromCPUUInt32(entry.metric)); 451f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_OIF, 452f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart ByteString::CreateFromCPUUInt32(interface_index)); 45375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 454f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return rtnl_handler_->SendMessage(&message); 45575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 45675e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 457c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// Somewhat surprisingly, the kernel allows you to create multiple routes 458c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// to the same destination through the same interface with different metrics. 459c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// Therefore, to change the metric on a route, we can't just use the 460c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// NLM_F_REPLACE flag by itself. We have to explicitly remove the old route. 461c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// We do so after creating the route at a new metric so there is no traffic 462c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart// disruption to existing network streams. 4637fab89734d88724a288e96a9996b15548c5294c7Ben Chanvoid RoutingTable::ReplaceMetric(uint32_t interface_index, 4641a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart RoutingTableEntry* entry, 4657fab89734d88724a288e96a9996b15548c5294c7Ben Chan uint32_t metric) { 466c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__ << " index " << interface_index 467c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " metric " << metric; 468d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal RoutingTableEntry new_entry = *entry; 469c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart new_entry.metric = metric; 470c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart // First create the route at the new metric. 471c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart ApplyRoute(interface_index, new_entry, RTNLMessage::kModeAdd, 472c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart NLM_F_CREATE | NLM_F_REPLACE); 473c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart // Then delete the route at the old metric. 474d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal ApplyRoute(interface_index, *entry, RTNLMessage::kModeDelete, 0); 475d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal // Now, update our routing table (via |*entry|) from |new_entry|. 476d4ef677ad36ef34f59529af557adbe77b2c29c80mukesh agrawal *entry = new_entry; 477c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart} 478c1dec4d5cad7c6ee2cd8dbc4f47e4d30403dcca1Paul Stewart 47975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewartbool RoutingTable::FlushCache() { 4801a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart static const char* kPaths[2] = { kRouteFlushPath4, kRouteFlushPath6 }; 48175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart bool ret = true; 48275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 483c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << __func__; 48475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 48575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart for (size_t i = 0; i < arraysize(kPaths); ++i) { 4866fbf64f493a9aae7d743888039c61a57386203dbBen Chan if (base::WriteFile(FilePath(kPaths[i]), "-1", 2) != 2) { 48775e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart LOG(ERROR) << base::StringPrintf("Cannot write to route flush file %s", 48875e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart kPaths[i]); 48975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart ret = false; 49075e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 49175e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart } 49275e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 49375e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart return ret; 49475e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} 49575e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart 4961a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewartbool RoutingTable::RequestRouteToHost(const IPAddress& address, 497e93b038972d43fd703b3c68603fb4d02bec6504ePaul Stewart int interface_index, 498abf6d289b2d29487f0a51b6138a127707a38507aDarin Petkov int tag, 4991a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const Query::Callback& callback, 500762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint8_t table_id) { 501e78ec548060d969fecdb488d6fed711d843bba91Paul Stewart // Make sure we don't get a cached response that is no longer valid. 502e78ec548060d969fecdb488d6fed711d843bba91Paul Stewart FlushCache(); 503e78ec548060d969fecdb488d6fed711d843bba91Paul Stewart 504f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage message( 505f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::kTypeRoute, 506f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::kModeQuery, 507f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart NLM_F_REQUEST, 508f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 0, 509f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 0, 510f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart interface_index, 511f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart address.family()); 512f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 513f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart RTNLMessage::RouteStatus status; 514f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart status.dst_prefix = address.prefix(); 515f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.set_route_status(status); 516f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart message.SetAttribute(RTA_DST, address.address()); 517536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart 518536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart if (interface_index != -1) { 519536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart message.SetAttribute(RTA_OIF, 520536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart ByteString::CreateFromCPUUInt32(interface_index)); 521536820ddd33f63e1d95e6e04e1757bd0248bbe38Paul Stewart } 522f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 523f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart if (!rtnl_handler_->SendMessage(&message)) { 524f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return false; 525f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart } 526f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 527f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // Save the sequence number of the request so we can create a route for 528f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart // this host when we get a reply. 529762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi route_queries_.push_back(Query(message.seq(), tag, callback, table_id)); 530f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 531f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart return true; 532f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart} 533f748a36f2cde2b1ac7fc543cc710c81cb431cc2fPaul Stewart 534a016312b7470e124774aec197e3b43bc795637c3Ben Chanbool RoutingTable::CreateBlackholeRoute(int interface_index, 535a6bfe87a2c0bcb68d789473ca10988243229667bBen Chan IPAddress::Family family, 536762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint32_t metric, 537762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint8_t table_id) { 538c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << base::StringPrintf( 539a016312b7470e124774aec197e3b43bc795637c3Ben Chan "%s: index %d family %s metric %d", 540a016312b7470e124774aec197e3b43bc795637c3Ben Chan __func__, interface_index, 541a016312b7470e124774aec197e3b43bc795637c3Ben Chan IPAddress::GetAddressFamilyName(family).c_str(), metric); 542a016312b7470e124774aec197e3b43bc795637c3Ben Chan 543a016312b7470e124774aec197e3b43bc795637c3Ben Chan RTNLMessage message( 544a016312b7470e124774aec197e3b43bc795637c3Ben Chan RTNLMessage::kTypeRoute, 545a016312b7470e124774aec197e3b43bc795637c3Ben Chan RTNLMessage::kModeAdd, 546a016312b7470e124774aec197e3b43bc795637c3Ben Chan NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL, 547a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0, 548a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0, 549a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0, 550a016312b7470e124774aec197e3b43bc795637c3Ben Chan family); 551a016312b7470e124774aec197e3b43bc795637c3Ben Chan 552a016312b7470e124774aec197e3b43bc795637c3Ben Chan message.set_route_status(RTNLMessage::RouteStatus( 553a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0, 554a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0, 555762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi table_id, 556a016312b7470e124774aec197e3b43bc795637c3Ben Chan RTPROT_BOOT, 557a016312b7470e124774aec197e3b43bc795637c3Ben Chan RT_SCOPE_UNIVERSE, 558a016312b7470e124774aec197e3b43bc795637c3Ben Chan RTN_BLACKHOLE, 559a016312b7470e124774aec197e3b43bc795637c3Ben Chan 0)); 560a016312b7470e124774aec197e3b43bc795637c3Ben Chan 561a016312b7470e124774aec197e3b43bc795637c3Ben Chan message.SetAttribute(RTA_PRIORITY, 562a016312b7470e124774aec197e3b43bc795637c3Ben Chan ByteString::CreateFromCPUUInt32(metric)); 563a016312b7470e124774aec197e3b43bc795637c3Ben Chan message.SetAttribute(RTA_OIF, 564a016312b7470e124774aec197e3b43bc795637c3Ben Chan ByteString::CreateFromCPUUInt32(interface_index)); 565a016312b7470e124774aec197e3b43bc795637c3Ben Chan 566a016312b7470e124774aec197e3b43bc795637c3Ben Chan return rtnl_handler_->SendMessage(&message); 567a016312b7470e124774aec197e3b43bc795637c3Ben Chan} 568a016312b7470e124774aec197e3b43bc795637c3Ben Chan 5694a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewartbool RoutingTable::CreateLinkRoute(int interface_index, 5701a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const IPAddress& local_address, 5711a212a6b98b22ad1d69652bb26a9e94138635476Paul Stewart const IPAddress& remote_address, 572762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi uint8_t table_id) { 5734a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart if (!local_address.CanReachAddress(remote_address)) { 5744a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart LOG(ERROR) << __func__ << " failed: " 5754a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart << remote_address.ToString() << " is not reachable from " 5764a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart << local_address.ToString(); 5774a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart return false; 5784a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart } 5794a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart 5804a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart IPAddress default_address(local_address.family()); 5814a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart default_address.SetAddressToDefault(); 5824a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart IPAddress destination_address(remote_address); 5834a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart destination_address.set_prefix( 5844a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart IPAddress::GetMaxPrefixLength(remote_address.family())); 585c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein SLOG(this, 2) << "Creating link route to " << destination_address.ToString() 586c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " from " << local_address.ToString() 587c9c31d8497c3f053c2160408cc386010fc125fadRebecca Silberstein << " on interface index " << interface_index; 5884a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart return AddRoute(interface_index, 5894a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart RoutingTableEntry(destination_address, 5904a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart local_address, 5914a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart default_address, 5924a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart 0, 5934a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart RT_SCOPE_LINK, 594762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi false, 595762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi table_id, 596762bfb8ab200a387fe732ec92423a5f0afe11bcfPrabhu Kaliamoorthi RoutingTableEntry::kDefaultTag)); 5974a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart} 5984a6748d492214afcb7c484668fa8cfd3ad963f10Paul Stewart 59975e89d2d5ecb3c42a869f485d4483fd2176381c0Paul Stewart} // namespace shill 600