summaryrefslogtreecommitdiffhomepage
path: root/test/syscalls/linux/proc_net_tcp.cc
diff options
context:
space:
mode:
Diffstat (limited to 'test/syscalls/linux/proc_net_tcp.cc')
-rw-r--r--test/syscalls/linux/proc_net_tcp.cc496
1 files changed, 0 insertions, 496 deletions
diff --git a/test/syscalls/linux/proc_net_tcp.cc b/test/syscalls/linux/proc_net_tcp.cc
deleted file mode 100644
index f61795592..000000000
--- a/test/syscalls/linux/proc_net_tcp.cc
+++ /dev/null
@@ -1,496 +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 "
- " ";
-
-// 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;
-};
-
-// Finds the first entry in 'entries' for which 'predicate' returns true.
-// Returns true on match, and sets 'match' to a copy of the matching entry. If
-// 'match' is null, it's ignored.
-bool FindBy(const std::vector<TCPEntry>& entries, TCPEntry* match,
- std::function<bool(const TCPEntry&)> predicate) {
- for (const TCPEntry& entry : entries) {
- if (predicate(entry)) {
- if (match != nullptr) {
- *match = entry;
- }
- return true;
- }
- }
- return false;
-}
-
-bool FindByLocalAddr(const std::vector<TCPEntry>& entries, TCPEntry* match,
- const struct sockaddr* addr) {
- uint32_t host = IPFromInetSockaddr(addr);
- uint16_t port = PortFromInetSockaddr(addr);
- return FindBy(entries, match, [host, port](const TCPEntry& e) {
- return (e.local_addr == host && e.local_port == port);
- });
-}
-
-bool FindByRemoteAddr(const std::vector<TCPEntry>& entries, TCPEntry* match,
- const struct sockaddr* addr) {
- uint32_t host = IPFromInetSockaddr(addr);
- uint16_t port = PortFromInetSockaddr(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 (const 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;
- ASSERT_TRUE(FindByLocalAddr(entries, &e, sockets->first_addr()));
- EXPECT_EQ(e.uid, geteuid());
- ASSERT_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);
- }
-
- EXPECT_TRUE(FindByLocalAddr(entries, nullptr, sockets->first_addr()));
- EXPECT_TRUE(FindByRemoteAddr(entries, nullptr, 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(RetryEINTR(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 = IPFromInetSockaddr(&addr);
- const uint16_t accepted_local_port = PortFromInetSockaddr(&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);
-}
-
-constexpr char kProcNetTCP6Header[] =
- " sl local_address remote_address"
- " st tx_queue rx_queue tr tm->when retrnsmt"
- " uid timeout inode";
-
-// TCP6Entry represents a single entry from /proc/net/tcp6.
-struct TCP6Entry {
- struct in6_addr local_addr;
- uint16_t local_port;
-
- struct in6_addr remote_addr;
- uint16_t remote_port;
-
- uint64_t state;
- uint64_t uid;
- uint64_t inode;
-};
-
-bool IPv6AddrEqual(const struct in6_addr* a1, const struct in6_addr* a2) {
- return memcmp(a1, a2, sizeof(struct in6_addr)) == 0;
-}
-
-// Finds the first entry in 'entries' for which 'predicate' returns true.
-// Returns true on match, and sets 'match' to a copy of the matching entry. If
-// 'match' is null, it's ignored.
-bool FindBy6(const std::vector<TCP6Entry>& entries, TCP6Entry* match,
- std::function<bool(const TCP6Entry&)> predicate) {
- for (const TCP6Entry& entry : entries) {
- if (predicate(entry)) {
- if (match != nullptr) {
- *match = entry;
- }
- return true;
- }
- }
- return false;
-}
-
-const struct in6_addr* IP6FromInetSockaddr(const struct sockaddr* addr) {
- auto* addr6 = reinterpret_cast<const struct sockaddr_in6*>(addr);
- return &addr6->sin6_addr;
-}
-
-bool FindByLocalAddr6(const std::vector<TCP6Entry>& entries, TCP6Entry* match,
- const struct sockaddr* addr) {
- const struct in6_addr* local = IP6FromInetSockaddr(addr);
- uint16_t port = PortFromInetSockaddr(addr);
- return FindBy6(entries, match, [local, port](const TCP6Entry& e) {
- return (IPv6AddrEqual(&e.local_addr, local) && e.local_port == port);
- });
-}
-
-bool FindByRemoteAddr6(const std::vector<TCP6Entry>& entries, TCP6Entry* match,
- const struct sockaddr* addr) {
- const struct in6_addr* remote = IP6FromInetSockaddr(addr);
- uint16_t port = PortFromInetSockaddr(addr);
- return FindBy6(entries, match, [remote, port](const TCP6Entry& e) {
- return (IPv6AddrEqual(&e.remote_addr, remote) && e.remote_port == port);
- });
-}
-
-void ReadIPv6Address(std::string s, struct in6_addr* addr) {
- uint32_t a0, a1, a2, a3;
- const char* fmt = "%08X%08X%08X%08X";
- EXPECT_EQ(sscanf(s.c_str(), fmt, &a0, &a1, &a2, &a3), 4);
-
- uint8_t* b = addr->s6_addr;
- *((uint32_t*)&b[0]) = a0;
- *((uint32_t*)&b[4]) = a1;
- *((uint32_t*)&b[8]) = a2;
- *((uint32_t*)&b[12]) = a3;
-}
-
-// Returns a parsed representation of /proc/net/tcp6 entries.
-PosixErrorOr<std::vector<TCP6Entry>> ProcNetTCP6Entries() {
- std::string content;
- RETURN_IF_ERRNO(GetContents("/proc/net/tcp6", &content));
-
- bool found_header = false;
- std::vector<TCP6Entry> entries;
- std::vector<std::string> lines = StrSplit(content, '\n');
- std::cerr << "<contents of /proc/net/tcp6>" << std::endl;
- for (const std::string& line : lines) {
- std::cerr << line << std::endl;
-
- if (!found_header) {
- EXPECT_EQ(line, kProcNetTCP6Header);
- found_header = true;
- continue;
- }
- if (line.empty()) {
- continue;
- }
-
- // Parse a single entry from /proc/net/tcp6.
- //
- // Example entries:
- //
- // clang-format off
- //
- // sl local_address remote_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
- // 0: 00000000000000000000000000000000:1F90 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 876340 1 ffff8803da9c9380 100 0 0 10 0
- // 1: 00000000000000000000000000000000:C350 00000000000000000000000000000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 876987 1 ffff8803ec408000 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
-
- TCP6Entry entry;
- std::vector<std::string> fields =
- StrSplit(line, absl::ByAnyChar(": "), absl::SkipEmpty());
-
- ReadIPv6Address(fields[1], &entry.local_addr);
- ASSIGN_OR_RETURN_ERRNO(entry.local_port, AtoiBase(fields[2], 16));
- ReadIPv6Address(fields[3], &entry.remote_addr);
- 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/tcp6>" << std::endl;
-
- return entries;
-}
-
-TEST(ProcNetTCP6, Exists) {
- const std::string content =
- ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/net/tcp6"));
- const std::string header_line = StrCat(kProcNetTCP6Header, "\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(ProcNetTCP6, EntryUID) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv6TCPAcceptBindSocketPair(0).Create());
- std::vector<TCP6Entry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
- TCP6Entry e;
-
- ASSERT_TRUE(FindByLocalAddr6(entries, &e, sockets->first_addr()));
- EXPECT_EQ(e.uid, geteuid());
- ASSERT_TRUE(FindByRemoteAddr6(entries, &e, sockets->first_addr()));
- EXPECT_EQ(e.uid, geteuid());
-}
-
-TEST(ProcNetTCP6, BindAcceptConnect) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv6TCPAcceptBindSocketPair(0).Create());
- std::vector<TCP6Entry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
- // We can only make assertions about the total number of entries if we control
- // the entire "machine".
- if (IsRunningOnGvisor()) {
- EXPECT_EQ(entries.size(), 2);
- }
-
- EXPECT_TRUE(FindByLocalAddr6(entries, nullptr, sockets->first_addr()));
- EXPECT_TRUE(FindByRemoteAddr6(entries, nullptr, sockets->first_addr()));
-}
-
-TEST(ProcNetTCP6, InodeReasonable) {
- auto sockets =
- ASSERT_NO_ERRNO_AND_VALUE(IPv6TCPAcceptBindSocketPair(0).Create());
- std::vector<TCP6Entry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
-
- TCP6Entry accepted_entry;
-
- ASSERT_TRUE(
- FindByLocalAddr6(entries, &accepted_entry, sockets->first_addr()));
- EXPECT_NE(accepted_entry.inode, 0);
-
- TCP6Entry client_entry;
- ASSERT_TRUE(FindByRemoteAddr6(entries, &client_entry, sockets->first_addr()));
- EXPECT_NE(client_entry.inode, 0);
- EXPECT_NE(accepted_entry.inode, client_entry.inode);
-}
-
-TEST(ProcNetTCP6, State) {
- std::unique_ptr<FileDescriptor> server =
- ASSERT_NO_ERRNO_AND_VALUE(IPv6TCPUnboundSocket(0).Create());
-
- auto test_addr = V6Loopback();
- ASSERT_THAT(
- bind(server->get(), reinterpret_cast<struct sockaddr*>(&test_addr.addr),
- test_addr.addr_len),
- SyscallSucceeds());
-
- struct sockaddr_in6 addr6;
- socklen_t addrlen = sizeof(struct sockaddr_in6);
- auto* addr = reinterpret_cast<struct sockaddr*>(&addr6);
- ASSERT_THAT(getsockname(server->get(), addr, &addrlen), SyscallSucceeds());
- ASSERT_EQ(addrlen, sizeof(struct sockaddr_in6));
-
- ASSERT_THAT(listen(server->get(), 10), SyscallSucceeds());
- std::vector<TCP6Entry> entries =
- ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
- TCP6Entry listen_entry;
-
- ASSERT_TRUE(FindByLocalAddr6(entries, &listen_entry, addr));
- EXPECT_EQ(listen_entry.state, TCP_LISTEN);
-
- std::unique_ptr<FileDescriptor> client =
- ASSERT_NO_ERRNO_AND_VALUE(IPv6TCPUnboundSocket(0).Create());
- ASSERT_THAT(RetryEINTR(connect)(client->get(), addr, addrlen),
- SyscallSucceeds());
- entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
- ASSERT_TRUE(FindByLocalAddr6(entries, &listen_entry, addr));
- EXPECT_EQ(listen_entry.state, TCP_LISTEN);
- TCP6Entry client_entry;
- ASSERT_TRUE(FindByRemoteAddr6(entries, &client_entry, addr));
- EXPECT_EQ(client_entry.state, TCP_ESTABLISHED);
-
- FileDescriptor accepted =
- ASSERT_NO_ERRNO_AND_VALUE(Accept(server->get(), nullptr, nullptr));
-
- const struct in6_addr* local = IP6FromInetSockaddr(addr);
- const uint16_t accepted_local_port = PortFromInetSockaddr(addr);
-
- entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCP6Entries());
- TCP6Entry accepted_entry;
- ASSERT_TRUE(FindBy6(
- entries, &accepted_entry,
- [client_entry, local, accepted_local_port](const TCP6Entry& e) {
- return IPv6AddrEqual(&e.local_addr, local) &&
- e.local_port == accepted_local_port &&
- IPv6AddrEqual(&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
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 17:13:30 +0000