| // Copyright 2019 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "patchpanel/datapath.h" |
| |
| #include <linux/if_tun.h> |
| #include <net/if.h> |
| #include <sys/ioctl.h> |
| |
| #include <utility> |
| #include <vector> |
| |
| #include <base/bind.h> |
| #include <base/bind_helpers.h> |
| #include <base/strings/string_util.h> |
| #include <gmock/gmock.h> |
| #include <gtest/gtest.h> |
| |
| #include "patchpanel/net_util.h" |
| |
| using testing::_; |
| using testing::ElementsAre; |
| using testing::Return; |
| using testing::StrEq; |
| |
| namespace patchpanel { |
| namespace { |
| |
| // TODO(hugobenichi) Centralize this constant definition |
| constexpr pid_t kTestPID = -2; |
| |
| std::vector<ioctl_req_t> ioctl_reqs; |
| std::vector<std::pair<std::string, struct rtentry>> ioctl_rtentry_args; |
| |
| // Capture all ioctls and succeed. |
| int ioctl_req_cap(int fd, ioctl_req_t req, ...) { |
| ioctl_reqs.push_back(req); |
| return 0; |
| } |
| |
| // Capture ioctls for SIOCADDRT and SIOCDELRT and succeed. |
| int ioctl_rtentry_cap(int fd, ioctl_req_t req, struct rtentry* arg) { |
| ioctl_reqs.push_back(req); |
| ioctl_rtentry_args.push_back({"", *arg}); |
| // Copy the string poited by rtentry.rt_dev because Add/DeleteIPv4Route pass |
| // this value to ioctl() on the stack. |
| if (arg->rt_dev) { |
| auto& cap = ioctl_rtentry_args.back(); |
| cap.first = std::string(arg->rt_dev); |
| cap.second.rt_dev = (char*)cap.first.c_str(); |
| } |
| return 0; |
| } |
| |
| } // namespace |
| |
| class MockProcessRunner : public MinijailedProcessRunner { |
| public: |
| MockProcessRunner() = default; |
| ~MockProcessRunner() = default; |
| |
| MOCK_METHOD2(RestoreDefaultNamespace, |
| int(const std::string& ifname, pid_t pid)); |
| MOCK_METHOD1(WriteSentinelToContainer, int(pid_t pid)); |
| MOCK_METHOD3(brctl, |
| int(const std::string& cmd, |
| const std::vector<std::string>& argv, |
| bool log_failures)); |
| MOCK_METHOD4(chown, |
| int(const std::string& uid, |
| const std::string& gid, |
| const std::string& file, |
| bool log_failures)); |
| MOCK_METHOD4(ip, |
| int(const std::string& obj, |
| const std::string& cmd, |
| const std::vector<std::string>& args, |
| bool log_failures)); |
| MOCK_METHOD4(ip6, |
| int(const std::string& obj, |
| const std::string& cmd, |
| const std::vector<std::string>& args, |
| bool log_failures)); |
| MOCK_METHOD3(iptables, |
| int(const std::string& table, |
| const std::vector<std::string>& argv, |
| bool log_failures)); |
| MOCK_METHOD3(ip6tables, |
| int(const std::string& table, |
| const std::vector<std::string>& argv, |
| bool log_failures)); |
| MOCK_METHOD2(modprobe_all, |
| int(const std::vector<std::string>& modules, bool log_failures)); |
| MOCK_METHOD3(sysctl_w, |
| int(const std::string& key, |
| const std::string& value, |
| bool log_failures)); |
| }; |
| |
| TEST(DatapathTest, AddTAP) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner, ioctl_req_cap); |
| MacAddress mac = {1, 2, 3, 4, 5, 6}; |
| Subnet subnet(Ipv4Addr(100, 115, 92, 4), 30, base::DoNothing()); |
| auto addr = subnet.AllocateAtOffset(0); |
| auto ifname = datapath.AddTAP("foo0", &mac, addr.get(), ""); |
| EXPECT_EQ(ifname, "foo0"); |
| std::vector<ioctl_req_t> expected = { |
| TUNSETIFF, TUNSETPERSIST, SIOCSIFADDR, SIOCSIFNETMASK, |
| SIOCSIFHWADDR, SIOCGIFFLAGS, SIOCSIFFLAGS}; |
| EXPECT_EQ(ioctl_reqs, expected); |
| ioctl_reqs.clear(); |
| } |
| |
| TEST(DatapathTest, AddTAPWithOwner) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner, ioctl_req_cap); |
| MacAddress mac = {1, 2, 3, 4, 5, 6}; |
| Subnet subnet(Ipv4Addr(100, 115, 92, 4), 30, base::DoNothing()); |
| auto addr = subnet.AllocateAtOffset(0); |
| auto ifname = datapath.AddTAP("foo0", &mac, addr.get(), "root"); |
| EXPECT_EQ(ifname, "foo0"); |
| std::vector<ioctl_req_t> expected = { |
| TUNSETIFF, TUNSETPERSIST, TUNSETOWNER, SIOCSIFADDR, |
| SIOCSIFNETMASK, SIOCSIFHWADDR, SIOCGIFFLAGS, SIOCSIFFLAGS}; |
| EXPECT_EQ(ioctl_reqs, expected); |
| ioctl_reqs.clear(); |
| } |
| |
| TEST(DatapathTest, AddTAPNoAddrs) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner, ioctl_req_cap); |
| auto ifname = datapath.AddTAP("foo0", nullptr, nullptr, ""); |
| EXPECT_EQ(ifname, "foo0"); |
| std::vector<ioctl_req_t> expected = {TUNSETIFF, TUNSETPERSIST, SIOCGIFFLAGS, |
| SIOCSIFFLAGS}; |
| EXPECT_EQ(ioctl_reqs, expected); |
| ioctl_reqs.clear(); |
| } |
| |
| TEST(DatapathTest, RemoveTAP) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, ip(StrEq("tuntap"), StrEq("del"), |
| ElementsAre("foo0", "mode", "tap"), true)); |
| Datapath datapath(&runner); |
| datapath.RemoveTAP("foo0"); |
| } |
| |
| TEST(DatapathTest, AddBridge) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner); |
| EXPECT_CALL(runner, brctl(StrEq("addbr"), ElementsAre("br"), true)); |
| EXPECT_CALL( |
| runner, |
| ip(StrEq("addr"), StrEq("add"), |
| ElementsAre("1.1.1.1/30", "brd", "1.1.1.3", "dev", "br"), true)); |
| EXPECT_CALL(runner, |
| ip(StrEq("link"), StrEq("set"), ElementsAre("br", "up"), true)); |
| EXPECT_CALL(runner, iptables(StrEq("mangle"), |
| ElementsAre("-A", "PREROUTING", "-i", "br", "-j", |
| "MARK", "--set-mark", "1", "-w"), |
| true)); |
| datapath.AddBridge("br", Ipv4Addr(1, 1, 1, 1), 30); |
| } |
| |
| TEST(DatapathTest, ConnectVethPair) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("add"), |
| ElementsAre("veth_foo", "type", "veth", "peer", "name", |
| "peer_foo"), |
| true)); |
| EXPECT_CALL(runner, ip(StrEq("addr"), StrEq("add"), |
| ElementsAre("100.115.92.169/30", "brd", |
| "100.115.92.171", "dev", "peer_foo"), |
| true)) |
| .WillOnce(Return(0)); |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("set"), |
| ElementsAre("dev", "peer_foo", "up", "addr", |
| "01:02:03:04:05:06", "multicast", "on"), |
| true)) |
| .WillOnce(Return(0)); |
| EXPECT_CALL(runner, RestoreDefaultNamespace(StrEq("veth_foo"), kTestPID)); |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("set"), |
| ElementsAre("veth_foo", "up"), true)); |
| Datapath datapath(&runner); |
| EXPECT_TRUE(datapath.ConnectVethPair(kTestPID, "veth_foo", "peer_foo", |
| {1, 2, 3, 4, 5, 6}, |
| Ipv4Addr(100, 115, 92, 169), 30, true)); |
| } |
| |
| TEST(DatapathTest, AddVirtualInterfacePair) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("add"), |
| ElementsAre("veth_foo", "type", "veth", "peer", "name", |
| "peer_foo"), |
| true)); |
| Datapath datapath(&runner); |
| EXPECT_TRUE(datapath.AddVirtualInterfacePair("veth_foo", "peer_foo")); |
| } |
| |
| TEST(DatapathTest, ToggleInterface) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, |
| ip(StrEq("link"), StrEq("set"), ElementsAre("foo", "up"), true)); |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("set"), |
| ElementsAre("bar", "down"), true)); |
| Datapath datapath(&runner); |
| EXPECT_TRUE(datapath.ToggleInterface("foo", true)); |
| EXPECT_TRUE(datapath.ToggleInterface("bar", false)); |
| } |
| |
| TEST(DatapathTest, ConfigureInterface) { |
| MockProcessRunner runner; |
| EXPECT_CALL( |
| runner, |
| ip(StrEq("addr"), StrEq("add"), |
| ElementsAre("1.1.1.1/30", "brd", "1.1.1.3", "dev", "foo"), true)) |
| .WillOnce(Return(0)); |
| EXPECT_CALL(runner, ip(StrEq("link"), StrEq("set"), |
| ElementsAre("dev", "foo", "up", "addr", |
| "02:02:02:02:02:02", "multicast", "on"), |
| true)) |
| .WillOnce(Return(0)); |
| |
| Datapath datapath(&runner); |
| MacAddress mac_addr = {2, 2, 2, 2, 2, 2}; |
| EXPECT_TRUE(datapath.ConfigureInterface("foo", mac_addr, Ipv4Addr(1, 1, 1, 1), |
| 30, true, true)); |
| } |
| |
| TEST(DatapathTest, RemoveInterface) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, |
| ip(StrEq("link"), StrEq("delete"), ElementsAre("foo"), false)); |
| Datapath datapath(&runner); |
| datapath.RemoveInterface("foo"); |
| } |
| |
| TEST(DatapathTest, RemoveBridge) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("mangle"), |
| ElementsAre("-D", "PREROUTING", "-i", "br", "-j", |
| "MARK", "--set-mark", "1", "-w"), |
| true)); |
| EXPECT_CALL(runner, |
| ip(StrEq("link"), StrEq("set"), ElementsAre("br", "down"), true)); |
| EXPECT_CALL(runner, brctl(StrEq("delbr"), ElementsAre("br"), true)); |
| Datapath datapath(&runner); |
| datapath.RemoveBridge("br"); |
| } |
| |
| TEST(DatapathTest, AddLegacyIPv4DNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-N", "dnat_arc", "-w"), true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "dnat_arc", "-j", "DNAT", |
| "--to-destination", "1.2.3.4", "-w"), |
| true)); |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), ElementsAre("-N", "try_arc", "-w"), true)); |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-m", "socket", |
| "--nowildcard", "-j", "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-p", "tcp", |
| "-j", "try_arc", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-p", "udp", |
| "-j", "try_arc", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.AddLegacyIPv4DNAT("1.2.3.4"); |
| } |
| |
| TEST(DatapathTest, RemoveLegacyIPv4DNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-p", "udp", |
| "-j", "try_arc", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-p", "tcp", |
| "-j", "try_arc", "-w"), |
| true)); |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-m", "socket", |
| "--nowildcard", "-j", "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), ElementsAre("-F", "try_arc", "-w"), true)); |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), ElementsAre("-X", "try_arc", "-w"), true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-F", "dnat_arc", "-w"), true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-X", "dnat_arc", "-w"), true)); |
| Datapath datapath(&runner); |
| datapath.RemoveLegacyIPv4DNAT(); |
| } |
| |
| TEST(DatapathTest, AddLegacyIPv4InboundDNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "try_arc", "-i", "wlan0", "-j", |
| "dnat_arc", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.AddLegacyIPv4InboundDNAT("wlan0"); |
| } |
| |
| TEST(DatapathTest, RemoveLegacyIPv4InboundDNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, |
| iptables(StrEq("nat"), ElementsAre("-F", "try_arc", "-w"), true)); |
| Datapath datapath(&runner); |
| datapath.RemoveLegacyIPv4InboundDNAT(); |
| } |
| |
| TEST(DatapathTest, AddInboundIPv4DNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-i", "eth0", |
| "-m", "socket", "--nowildcard", "-j", |
| "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-i", "eth0", |
| "-p", "tcp", "-j", "DNAT", |
| "--to-destination", "1.2.3.4", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-A", "PREROUTING", "-i", "eth0", |
| "-p", "udp", "-j", "DNAT", |
| "--to-destination", "1.2.3.4", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.AddInboundIPv4DNAT("eth0", "1.2.3.4"); |
| } |
| |
| TEST(DatapathTest, RemoveInboundIPv4DNAT) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-i", "eth0", |
| "-m", "socket", "--nowildcard", "-j", |
| "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-i", "eth0", |
| "-p", "tcp", "-j", "DNAT", |
| "--to-destination", "1.2.3.4", "-w"), |
| true)); |
| EXPECT_CALL(runner, iptables(StrEq("nat"), |
| ElementsAre("-D", "PREROUTING", "-i", "eth0", |
| "-p", "udp", "-j", "DNAT", |
| "--to-destination", "1.2.3.4", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.RemoveInboundIPv4DNAT("eth0", "1.2.3.4"); |
| } |
| |
| TEST(DatapathTest, AddOutboundIPv4) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("filter"), |
| ElementsAre("-A", "FORWARD", "-o", "eth0", "-j", |
| "ACCEPT", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.AddOutboundIPv4("eth0"); |
| } |
| |
| TEST(DatapathTest, RemoveInboundIPv4) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, iptables(StrEq("filter"), |
| ElementsAre("-D", "FORWARD", "-o", "eth0", "-j", |
| "ACCEPT", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.RemoveOutboundIPv4("eth0"); |
| } |
| |
| TEST(DatapathTest, MaskInterfaceFlags) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner, ioctl_req_cap); |
| bool result = datapath.MaskInterfaceFlags("foo0", IFF_DEBUG); |
| EXPECT_TRUE(result); |
| std::vector<ioctl_req_t> expected = {SIOCGIFFLAGS, SIOCSIFFLAGS}; |
| EXPECT_EQ(ioctl_reqs, expected); |
| ioctl_reqs.clear(); |
| } |
| |
| TEST(DatapathTest, AddIPv6Forwarding) { |
| MockProcessRunner runner; |
| // Return 1 on iptables -C to simulate rule not existing case |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-C", "FORWARD", "-i", "eth0", "-o", |
| "arc_eth0", "-j", "ACCEPT", "-w"), |
| false)) |
| .WillOnce(Return(1)); |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-A", "FORWARD", "-i", "eth0", "-o", |
| "arc_eth0", "-j", "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-C", "FORWARD", "-i", "arc_eth0", |
| "-o", "eth0", "-j", "ACCEPT", "-w"), |
| false)) |
| .WillOnce(Return(1)); |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-A", "FORWARD", "-i", "arc_eth0", |
| "-o", "eth0", "-j", "ACCEPT", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.AddIPv6Forwarding("eth0", "arc_eth0"); |
| } |
| |
| TEST(DatapathTest, AddIPv6ForwardingRuleExists) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-C", "FORWARD", "-i", "eth0", "-o", |
| "arc_eth0", "-j", "ACCEPT", "-w"), |
| false)); |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-C", "FORWARD", "-i", "arc_eth0", |
| "-o", "eth0", "-j", "ACCEPT", "-w"), |
| false)); |
| Datapath datapath(&runner); |
| datapath.AddIPv6Forwarding("eth0", "arc_eth0"); |
| } |
| |
| TEST(DatapathTest, RemoveIPv6Forwarding) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-D", "FORWARD", "-i", "eth0", "-o", |
| "arc_eth0", "-j", "ACCEPT", "-w"), |
| true)); |
| EXPECT_CALL(runner, ip6tables(StrEq("filter"), |
| ElementsAre("-D", "FORWARD", "-i", "arc_eth0", |
| "-o", "eth0", "-j", "ACCEPT", "-w"), |
| true)); |
| Datapath datapath(&runner); |
| datapath.RemoveIPv6Forwarding("eth0", "arc_eth0"); |
| } |
| |
| TEST(DatapathTest, AddIPv6HostRoute) { |
| MockProcessRunner runner; |
| EXPECT_CALL(runner, |
| ip6(StrEq("route"), StrEq("replace"), |
| ElementsAre("2001:da8:e00::1234/128", "dev", "eth0"), true)); |
| Datapath datapath(&runner); |
| datapath.AddIPv6HostRoute("eth0", "2001:da8:e00::1234", 128); |
| } |
| |
| TEST(DatapathTest, AddIPv4Route) { |
| MockProcessRunner runner; |
| Datapath datapath(&runner, (ioctl_t)ioctl_rtentry_cap); |
| |
| datapath.AddIPv4Route(Ipv4Addr(192, 168, 1, 1), Ipv4Addr(100, 115, 93, 0), |
| Ipv4Addr(255, 255, 255, 0)); |
| datapath.DeleteIPv4Route(Ipv4Addr(192, 168, 1, 1), Ipv4Addr(100, 115, 93, 0), |
| Ipv4Addr(255, 255, 255, 0)); |
| datapath.AddIPv4Route("eth0", Ipv4Addr(100, 115, 92, 8), |
| Ipv4Addr(255, 255, 255, 252)); |
| datapath.DeleteIPv4Route("eth0", Ipv4Addr(100, 115, 92, 8), |
| Ipv4Addr(255, 255, 255, 252)); |
| |
| std::vector<ioctl_req_t> expected_reqs = {SIOCADDRT, SIOCDELRT, SIOCADDRT, |
| SIOCDELRT}; |
| EXPECT_EQ(expected_reqs, ioctl_reqs); |
| ioctl_reqs.clear(); |
| |
| std::string route1 = |
| "{rt_dst: {family: AF_INET, port: 0, addr: 100.115.93.0}, rt_genmask: " |
| "{family: AF_INET, port: 0, addr: 255.255.255.0}, rt_gateway: {family: " |
| "AF_INET, port: 0, addr: 192.168.1.1}, rt_dev: null, rt_flags: RTF_UP | " |
| "RTF_GATEWAY}"; |
| std::string route2 = |
| "{rt_dst: {family: AF_INET, port: 0, addr: 100.115.92.8}, rt_genmask: " |
| "{family: AF_INET, port: 0, addr: 255.255.255.252}, rt_gateway: {unset}, " |
| "rt_dev: eth0, rt_flags: RTF_UP | RTF_GATEWAY}"; |
| std::vector<std::string> captured_routes; |
| for (const auto& route : ioctl_rtentry_args) { |
| std::ostringstream stream; |
| stream << route.second; |
| captured_routes.emplace_back(stream.str()); |
| } |
| ioctl_rtentry_args.clear(); |
| EXPECT_EQ(route1, captured_routes[0]); |
| EXPECT_EQ(route1, captured_routes[1]); |
| EXPECT_EQ(route2, captured_routes[2]); |
| EXPECT_EQ(route2, captured_routes[3]); |
| } |
| |
| } // namespace patchpanel |
