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-rw-r--r--test/syscalls/linux/proc_net_tcp.cc281
1 files changed, 0 insertions, 281 deletions
diff --git a/test/syscalls/linux/proc_net_tcp.cc b/test/syscalls/linux/proc_net_tcp.cc
deleted file mode 100644
index 578b20680..000000000
--- a/test/syscalls/linux/proc_net_tcp.cc
+++ /dev/null
@@ -1,281 +0,0 @@
-// Copyright 2019 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest.h"
-#include "absl/strings/numbers.h"
-#include "absl/strings/str_join.h"
-#include "absl/strings/str_split.h"
-#include "test/syscalls/linux/ip_socket_test_util.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/test_util.h"
-
-namespace gvisor {
-namespace testing {
-namespace {
-
-using absl::StrCat;
-using absl::StrSplit;
-
-constexpr char kProcNetTCPHeader[] =
- " sl local_address rem_address st tx_queue rx_queue tr tm->when "
- "retrnsmt uid timeout inode "
- " ";
-
-// Possible values of the "st" field in a /proc/net/tcp entry. Source: Linux
-// kernel, include/net/tcp_states.h.
-enum {
- TCP_ESTABLISHED = 1,
- TCP_SYN_SENT,
- TCP_SYN_RECV,
- TCP_FIN_WAIT1,
- TCP_FIN_WAIT2,
- TCP_TIME_WAIT,
- TCP_CLOSE,
- TCP_CLOSE_WAIT,
- TCP_LAST_ACK,
- TCP_LISTEN,
- TCP_CLOSING,
- TCP_NEW_SYN_RECV,
-
- TCP_MAX_STATES
-};
-
-// TCPEntry represents a single entry from /proc/net/tcp.
-struct TCPEntry {
- uint32_t local_addr;
- uint16_t local_port;
-
- uint32_t remote_addr;
- uint16_t remote_port;
-
- uint64_t state;
- uint64_t uid;
- uint64_t inode;
-};
-
-uint32_t IP(const struct sockaddr* addr) {
- auto* in_addr = reinterpret_cast<const struct sockaddr_in*>(addr);
- return in_addr->sin_addr.s_addr;
-}
-
-uint16_t Port(const struct sockaddr* addr) {
- auto* in_addr = reinterpret_cast<const struct sockaddr_in*>(addr);
- return ntohs(in_addr->sin_port);
-}
-
-// Finds the first entry in 'entries' for which 'predicate' returns true.
-// Returns true on match, and sets 'match' to point to the matching entry.
-bool FindBy(std::vector<TCPEntry> entries, TCPEntry* match,
- std::function<bool(const TCPEntry&)> predicate) {
- for (int i = 0; i < entries.size(); ++i) {
- if (predicate(entries[i])) {
- *match = entries[i];
- return true;
- }
- }
- return false;
-}
-
-bool FindByLocalAddr(std::vector<TCPEntry> entries, TCPEntry* match,
- const struct sockaddr* addr) {
- uint32_t host = IP(addr);
- uint16_t port = Port(addr);
- return FindBy(entries, match, [host, port](const TCPEntry& e) {
- return (e.local_addr == host && e.local_port == port);
- });
-}
-
-bool FindByRemoteAddr(std::vector<TCPEntry> entries, TCPEntry* match,
- const struct sockaddr* addr) {
- uint32_t host = IP(addr);
- uint16_t port = Port(addr);
- return FindBy(entries, match, [host, port](const TCPEntry& e) {
- return (e.remote_addr == host && e.remote_port == port);
- });
-}
-
-// Returns a parsed representation of /proc/net/tcp entries.
-PosixErrorOr<std::vector<TCPEntry>> ProcNetTCPEntries() {
- std::string content;
- RETURN_IF_ERRNO(GetContents("/proc/net/tcp", &content));
-
- bool found_header = false;
- std::vector<TCPEntry> entries;
- std::vector<std::string> lines = StrSplit(content, '\n');
- std::cerr << "<contents of /proc/net/tcp>" << std::endl;
- for (std::string line : lines) {
- std::cerr << line << std::endl;
-
- if (!found_header) {
- EXPECT_EQ(line, kProcNetTCPHeader);
- found_header = true;
- continue;
- }
- if (line.empty()) {
- continue;
- }
-
- // Parse a single entry from /proc/net/tcp.
- //
- // Example entries:
- //
- // clang-format off
- //
- // sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
- // 0: 00000000:006F 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 1968 1 0000000000000000 100 0 0 10 0
- // 1: 0100007F:7533 00000000:0000 0A 00000000:00000000 00:00000000 00000000 120 0 10684 1 0000000000000000 100 0 0 10 0
- // ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
- // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
- //
- // clang-format on
-
- TCPEntry entry;
- std::vector<std::string> fields =
- StrSplit(line, absl::ByAnyChar(": "), absl::SkipEmpty());
-
- ASSIGN_OR_RETURN_ERRNO(entry.local_addr, AtoiBase(fields[1], 16));
- ASSIGN_OR_RETURN_ERRNO(entry.local_port, AtoiBase(fields[2], 16));
-
- ASSIGN_OR_RETURN_ERRNO(entry.remote_addr, AtoiBase(fields[3], 16));
- ASSIGN_OR_RETURN_ERRNO(entry.remote_port, AtoiBase(fields[4], 16));
-
- ASSIGN_OR_RETURN_ERRNO(entry.state, AtoiBase(fields[5], 16));
- ASSIGN_OR_RETURN_ERRNO(entry.uid, Atoi<uint64_t>(fields[11]));
- ASSIGN_OR_RETURN_ERRNO(entry.inode, Atoi<uint64_t>(fields[13]));
-
- entries.push_back(entry);
- }
- std::cerr << "<end of /proc/net/tcp>" << std::endl;
-
- return entries;
-}
-
-TEST(ProcNetTCP, Exists) {
- const std::string content =
- ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/net/tcp"));
- const std::string header_line = StrCat(kProcNetTCPHeader, "\n");
- if (IsRunningOnGvisor()) {
- // Should be just the header since we don't have any tcp sockets yet.
- EXPECT_EQ(content, header_line);
- } else {
- // On a general linux machine, we could have abitrary sockets on the system,
- // so just check the header.
- EXPECT_THAT(content, ::testing::StartsWith(header_line));
- }
-}
-
-TEST(ProcNetTCP, EntryUID) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
- std::vector<TCPEntry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
- TCPEntry e;
- EXPECT_TRUE(FindByLocalAddr(entries, &e, sockets->first_addr()));
- EXPECT_EQ(e.uid, geteuid());
- EXPECT_TRUE(FindByRemoteAddr(entries, &e, sockets->first_addr()));
- EXPECT_EQ(e.uid, geteuid());
-}
-
-TEST(ProcNetTCP, BindAcceptConnect) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
- std::vector<TCPEntry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
- // We can only make assertions about the total number of entries if we control
- // the entire "machine".
- if (IsRunningOnGvisor()) {
- EXPECT_EQ(entries.size(), 2);
- }
-
- TCPEntry e;
- EXPECT_TRUE(FindByLocalAddr(entries, &e, sockets->first_addr()));
- EXPECT_TRUE(FindByRemoteAddr(entries, &e, sockets->first_addr()));
-}
-
-TEST(ProcNetTCP, InodeReasonable) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
- std::vector<TCPEntry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
-
- TCPEntry accepted_entry;
- ASSERT_TRUE(FindByLocalAddr(entries, &accepted_entry, sockets->first_addr()));
- EXPECT_NE(accepted_entry.inode, 0);
-
- TCPEntry client_entry;
- ASSERT_TRUE(FindByRemoteAddr(entries, &client_entry, sockets->first_addr()));
- EXPECT_NE(client_entry.inode, 0);
- EXPECT_NE(accepted_entry.inode, client_entry.inode);
-}
-
-TEST(ProcNetTCP, State) {
- std::unique_ptr<FileDescriptor> server =
- ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPUnboundSocket(0).Create());
-
- auto test_addr = V4Loopback();
- ASSERT_THAT(
- bind(server->get(), reinterpret_cast<struct sockaddr*>(&test_addr.addr),
- test_addr.addr_len),
- SyscallSucceeds());
-
- struct sockaddr addr;
- socklen_t addrlen = sizeof(struct sockaddr);
- ASSERT_THAT(getsockname(server->get(), &addr, &addrlen), SyscallSucceeds());
- ASSERT_EQ(addrlen, sizeof(struct sockaddr));
-
- ASSERT_THAT(listen(server->get(), 10), SyscallSucceeds());
- std::vector<TCPEntry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
- TCPEntry listen_entry;
- ASSERT_TRUE(FindByLocalAddr(entries, &listen_entry, &addr));
- EXPECT_EQ(listen_entry.state, TCP_LISTEN);
-
- std::unique_ptr<FileDescriptor> client =
- ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPUnboundSocket(0).Create());
- ASSERT_THAT(connect(client->get(), &addr, addrlen), SyscallSucceeds());
- entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
- ASSERT_TRUE(FindByLocalAddr(entries, &listen_entry, &addr));
- EXPECT_EQ(listen_entry.state, TCP_LISTEN);
- TCPEntry client_entry;
- ASSERT_TRUE(FindByRemoteAddr(entries, &client_entry, &addr));
- EXPECT_EQ(client_entry.state, TCP_ESTABLISHED);
-
- FileDescriptor accepted =
- ASSERT_NO_ERRNO_AND_VALUE(Accept(server->get(), nullptr, nullptr));
-
- const uint32_t accepted_local_host = IP(&addr);
- const uint16_t accepted_local_port = Port(&addr);
-
- entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
- TCPEntry accepted_entry;
- ASSERT_TRUE(FindBy(entries, &accepted_entry,
- [client_entry, accepted_local_host,
- accepted_local_port](const TCPEntry& e) {
- return e.local_addr == accepted_local_host &&
- e.local_port == accepted_local_port &&
- e.remote_addr == client_entry.local_addr &&
- e.remote_port == client_entry.local_port;
- }));
- EXPECT_EQ(accepted_entry.state, TCP_ESTABLISHED);
-}
-
-} // namespace
-} // namespace testing
-} // namespace gvisor
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