1 //===-- SocketTestUtilities.cpp -------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
name_callback(const UChar * name,const UChar * name_end,int ngroup_num,int * group_nums,regex_t * reg,void * arg)9 #include "SocketTestUtilities.h"
10 #include "lldb/Host/Config.h"
11 #include "lldb/Utility/StreamString.h"
12
13 #ifdef _WIN32
14 #include <winsock2.h>
15 #include <ws2tcpip.h>
16 #else
17 #include <arpa/inet.h>
18 #endif
19
20 using namespace lldb_private;
21
22 static void AcceptThread(Socket *listen_socket, bool child_processes_inherit,
23 Socket **accept_socket, Status *error) {
24 *error = listen_socket->Accept(*accept_socket);
25 }
26
main(int argc,char * argv[])27 template <typename SocketType>
28 void lldb_private::CreateConnectedSockets(
29 llvm::StringRef listen_remote_address,
30 const std::function<std::string(const SocketType &)> &get_connect_addr,
31 std::unique_ptr<SocketType> *a_up, std::unique_ptr<SocketType> *b_up) {
32 bool child_processes_inherit = false;
33 Status error;
34 std::unique_ptr<SocketType> listen_socket_up(
35 new SocketType(true, child_processes_inherit));
36 ASSERT_THAT_ERROR(error.ToError(), llvm::Succeeded());
37 error = listen_socket_up->Listen(listen_remote_address, 5);
38 ASSERT_THAT_ERROR(error.ToError(), llvm::Succeeded());
39 ASSERT_TRUE(listen_socket_up->IsValid());
40
41 Status accept_error;
42 Socket *accept_socket;
43 std::thread accept_thread(AcceptThread, listen_socket_up.get(),
44 child_processes_inherit, &accept_socket,
45 &accept_error);
46
47 std::string connect_remote_address = get_connect_addr(*listen_socket_up);
48 std::unique_ptr<SocketType> connect_socket_up(
49 new SocketType(true, child_processes_inherit));
50 ASSERT_THAT_ERROR(error.ToError(), llvm::Succeeded());
51 error = connect_socket_up->Connect(connect_remote_address);
52 ASSERT_THAT_ERROR(error.ToError(), llvm::Succeeded());
53 ASSERT_TRUE(connect_socket_up->IsValid());
54
55 a_up->swap(connect_socket_up);
56 ASSERT_TRUE((*a_up)->IsValid());
57
58 accept_thread.join();
59 b_up->reset(static_cast<SocketType *>(accept_socket));
60 ASSERT_THAT_ERROR(accept_error.ToError(), llvm::Succeeded());
61 ASSERT_NE(nullptr, b_up->get());
62 ASSERT_TRUE((*b_up)->IsValid());
63
64 listen_socket_up.reset();
65 }
66
67 bool lldb_private::CreateTCPConnectedSockets(
68 std::string listen_remote_ip, std::unique_ptr<TCPSocket> *socket_a_up,
69 std::unique_ptr<TCPSocket> *socket_b_up) {
70 StreamString strm;
71 strm.Printf("[%s]:0", listen_remote_ip.c_str());
72 CreateConnectedSockets<TCPSocket>(
73 strm.GetString(),
74 [=](const TCPSocket &s) {
75 char connect_remote_address[64];
76 snprintf(connect_remote_address, sizeof(connect_remote_address),
77 "[%s]:%u", listen_remote_ip.c_str(), s.GetLocalPortNumber());
78 return std::string(connect_remote_address);
79 },
80 socket_a_up, socket_b_up);
81 return true;
82 }
83
84 #if LLDB_ENABLE_POSIX
85 void lldb_private::CreateDomainConnectedSockets(
86 llvm::StringRef path, std::unique_ptr<DomainSocket> *socket_a_up,
87 std::unique_ptr<DomainSocket> *socket_b_up) {
88 return CreateConnectedSockets<DomainSocket>(
89 path, [=](const DomainSocket &) { return path.str(); }, socket_a_up,
90 socket_b_up);
91 }
92 #endif
93
94 static bool CheckIPSupport(llvm::StringRef Proto, llvm::StringRef Addr) {
95 llvm::Expected<std::unique_ptr<TCPSocket>> Sock = Socket::TcpListen(
96 Addr, /*child_processes_inherit=*/false, /*predicate=*/nullptr);
97 if (Sock)
98 return true;
99 llvm::Error Err = Sock.takeError();
100 GTEST_LOG_(WARNING) << llvm::formatv(
101 "Creating a canary {0} TCP socket failed: {1}.",
102 Proto, Err)
103 .str();
104 bool HasProtocolError = false;
105 handleAllErrors(std::move(Err), [&](std::unique_ptr<llvm::ECError> ECErr) {
106 std::error_code ec = ECErr->convertToErrorCode();
107 if (ec == std::make_error_code(std::errc::address_family_not_supported) ||
108 ec == std::make_error_code(std::errc::address_not_available))
109 HasProtocolError = true;
110 });
111 if (HasProtocolError) {
112 GTEST_LOG_(WARNING)
113 << llvm::formatv(
114 "Assuming the host does not support {0}. Skipping test.", Proto)
115 .str();
116 return false;
117 }
118 GTEST_LOG_(WARNING) << "Continuing anyway. The test will probably fail.";
119 return true;
120 }
121
122 bool lldb_private::HostSupportsIPv4() {
123 return CheckIPSupport("IPv4", "127.0.0.1:0");
124 }
125
126 bool lldb_private::HostSupportsIPv6() {
127 return CheckIPSupport("IPv6", "[::1]:0");
128 }
129