// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif
#include "net/base/network_interfaces_getifaddrs.h"
#include <string>
#include "build/build_config.h"
#include "net/base/ip_endpoint.h"
#include "testing/gtest/include/gtest/gtest.h"
#include <ifaddrs.h>
#include <net/if.h>
#include <netinet/in.h>
namespace net {
namespace {
class IPAttributesGetterTest : public internal::IPAttributesGetter {
public:
IPAttributesGetterTest() = default;
// internal::IPAttributesGetter interface.
bool IsInitialized() const override { return true; }
bool GetAddressAttributes(const ifaddrs* if_addr, int* attributes) override {
*attributes = attributes_;
return true;
}
NetworkChangeNotifier::ConnectionType GetNetworkInterfaceType(
const ifaddrs* if_addr) override {
return NetworkChangeNotifier::CONNECTION_UNKNOWN;
}
void set_attributes(int attributes) { attributes_ = attributes; }
private:
int attributes_ = 0;
};
// Helper function to create a single valid ifaddrs
bool FillIfaddrs(ifaddrs* interfaces,
const char* ifname,
uint flags,
const IPAddress& ip_address,
const IPAddress& ip_netmask,
sockaddr_storage sock_addrs[2]) {
interfaces->ifa_next = nullptr;
interfaces->ifa_name = const_cast<char*>(ifname);
interfaces->ifa_flags = flags;
socklen_t sock_len = sizeof(sockaddr_storage);
// Convert to sockaddr for next check.
if (!IPEndPoint(ip_address, 0)
.ToSockAddr(reinterpret_cast<sockaddr*>(&sock_addrs[0]),
&sock_len)) {
return false;
}
interfaces->ifa_addr = reinterpret_cast<sockaddr*>(&sock_addrs[0]);
sock_len = sizeof(sockaddr_storage);
if (!IPEndPoint(ip_netmask, 0)
.ToSockAddr(reinterpret_cast<sockaddr*>(&sock_addrs[1]),
&sock_len)) {
return false;
}
interfaces->ifa_netmask = reinterpret_cast<sockaddr*>(&sock_addrs[1]);
return true;
}
static const char kIfnameEm1[] = "em1";
static const char kIfnameVmnet[] = "vmnet";
static const unsigned char kIPv6LocalAddr[] = {0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 1};
// The following 3 addresses need to be changed together. IPv6Addr is the IPv6
// address. IPv6Netmask is the mask address with as many leading bits set to 1
// as the prefix length. IPv6AddrPrefix needs to match IPv6Addr with the same
// number of bits as the prefix length.
static const unsigned char kIPv6Addr[] = {0x24, 0x01, 0xfa, 0x00, 0x00, 0x04,
0x10, 0x00, 0xbe, 0x30, 0x5b, 0xff,
0xfe, 0xe5, 0x00, 0xc3};
static const unsigned char kIPv6Netmask[] = {0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00};
TEST(NetworkInterfacesTest, IfaddrsToNetworkInterfaceList) {
IPAddress ipv6_local_address(kIPv6LocalAddr);
IPAddress ipv6_address(kIPv6Addr);
IPAddress ipv6_netmask(kIPv6Netmask);
NetworkInterfaceList results;
IPAttributesGetterTest ip_attributes_getter;
sockaddr_storage addresses[2];
ifaddrs interface;
// Address of offline (not running) links should be ignored.
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_UP, ipv6_address,
ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 0ul);
// Address of offline (not up) links should be ignored.
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_RUNNING, ipv6_address,
ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 0ul);
// Local address should be trimmed out.
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_UP | IFF_RUNNING,
ipv6_local_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 0ul);
// vmware address should return by default.
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameVmnet, IFF_UP | IFF_RUNNING,
ipv6_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 1ul);
EXPECT_EQ(results[0].name, kIfnameVmnet);
EXPECT_EQ(results[0].prefix_length, 1ul);
EXPECT_EQ(results[0].address, ipv6_address);
results.clear();
// vmware address should be trimmed out if policy specified so.
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameVmnet, IFF_UP | IFF_RUNNING,
ipv6_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 0ul);
results.clear();
// Addresses with banned attributes should be ignored.
ip_attributes_getter.set_attributes(IP_ADDRESS_ATTRIBUTE_ANYCAST);
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_UP | IFF_RUNNING,
ipv6_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 0ul);
results.clear();
// Addresses with allowed attribute IFA_F_TEMPORARY should be returned and
// attributes should be translated correctly.
ip_attributes_getter.set_attributes(IP_ADDRESS_ATTRIBUTE_TEMPORARY);
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_UP | IFF_RUNNING,
ipv6_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 1ul);
EXPECT_EQ(results[0].name, kIfnameEm1);
EXPECT_EQ(results[0].prefix_length, 1ul);
EXPECT_EQ(results[0].address, ipv6_address);
EXPECT_EQ(results[0].ip_address_attributes, IP_ADDRESS_ATTRIBUTE_TEMPORARY);
results.clear();
// Addresses with allowed attribute IFA_F_DEPRECATED should be returned and
// attributes should be translated correctly.
ip_attributes_getter.set_attributes(IP_ADDRESS_ATTRIBUTE_DEPRECATED);
ASSERT_TRUE(FillIfaddrs(&interface, kIfnameEm1, IFF_UP | IFF_RUNNING,
ipv6_address, ipv6_netmask, addresses));
EXPECT_TRUE(internal::IfaddrsToNetworkInterfaceList(
INCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES, &interface, &ip_attributes_getter,
&results));
EXPECT_EQ(results.size(), 1ul);
EXPECT_EQ(results[0].name, kIfnameEm1);
EXPECT_EQ(results[0].prefix_length, 1ul);
EXPECT_EQ(results[0].address, ipv6_address);
EXPECT_EQ(results[0].ip_address_attributes, IP_ADDRESS_ATTRIBUTE_DEPRECATED);
results.clear();
}
} // namespace
} // namespace net
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