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-rw-r--r--test/syscalls/linux/ip_socket_test_util.cc8
-rw-r--r--test/syscalls/linux/ip_socket_test_util.h4
-rw-r--r--test/syscalls/linux/proc_net_tcp.cc241
3 files changed, 253 insertions, 0 deletions
diff --git a/test/syscalls/linux/ip_socket_test_util.cc b/test/syscalls/linux/ip_socket_test_util.cc
index 410b42a47..f81ed22c8 100644
--- a/test/syscalls/linux/ip_socket_test_util.cc
+++ b/test/syscalls/linux/ip_socket_test_util.cc
@@ -60,6 +60,14 @@ SocketPairKind IPv6TCPAcceptBindSocketPair(int type) {
/* dual_stack = */ false)};
}
+SocketKind IPv6TCPUnboundSocket(int type) {
+ std::string description =
+ absl::StrCat(DescribeSocketType(type), "IPv6 TCP socket");
+ return SocketKind{
+ description, AF_INET6, type | SOCK_STREAM, IPPROTO_TCP,
+ UnboundSocketCreator(AF_INET6, type | SOCK_STREAM, IPPROTO_TCP)};
+}
+
SocketPairKind IPv4TCPAcceptBindSocketPair(int type) {
std::string description =
absl::StrCat(DescribeSocketType(type), "connected IPv4 TCP socket");
diff --git a/test/syscalls/linux/ip_socket_test_util.h b/test/syscalls/linux/ip_socket_test_util.h
index 3d36b9620..a7825770e 100644
--- a/test/syscalls/linux/ip_socket_test_util.h
+++ b/test/syscalls/linux/ip_socket_test_util.h
@@ -96,6 +96,10 @@ SocketKind IPv4UDPUnboundSocket(int type);
// a SimpleSocket created with AF_INET, SOCK_STREAM and the given type.
SocketKind IPv4TCPUnboundSocket(int type);
+// IPv6TCPUnboundSocketPair returns a SocketKind that represents
+// a SimpleSocket created with AF_INET6, SOCK_STREAM and the given type.
+SocketKind IPv6TCPUnboundSocket(int type);
+
// IfAddrHelper is a helper class that determines the local interfaces present
// and provides functions to obtain their names, index numbers, and IP address.
class IfAddrHelper {
diff --git a/test/syscalls/linux/proc_net_tcp.cc b/test/syscalls/linux/proc_net_tcp.cc
index f6d7ad0bb..f61795592 100644
--- a/test/syscalls/linux/proc_net_tcp.cc
+++ b/test/syscalls/linux/proc_net_tcp.cc
@@ -250,6 +250,247 @@ TEST(ProcNetTCP, State) {
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
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