747 lines
21 KiB
C++
747 lines
21 KiB
C++
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#define CHBUF_SIZE (256 * 1024)
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#define POLLVEC_SIZE (DrivenEngine::MAX_CHAN + 1)
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static MonoClock monoclock;
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namespace util
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{
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double profiling_clock()
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{
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return monoclock.get();
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}
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}
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static void if_error_print_and_exit(const std::string &str)
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{
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if (!str.empty())
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{
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std::cerr << std::endl
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<< "error: " << str << std::endl;
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exit(1);
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}
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}
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static std::string_view read_file(const char *fn, char *buf, int bufsize, std::string &err)
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{
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FILE *f = fopen(fn, "r");
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if (f == 0)
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{
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err = std::string("cannot read file") + fn;
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buf[0] = 0;
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return std::string_view(buf, 0);
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}
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int nread = fread(buf, 1, bufsize, f);
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if (nread < 0)
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{
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err = std::string("cannot read file: ") + fn;
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buf[0] = 0;
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return std::string_view(buf, 0);
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}
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if (nread == bufsize)
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{
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err = std::string("file too large: ") + fn;
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buf[0] = 0;
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return std::string_view(buf, 0);
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}
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err = "";
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return std::string_view(buf, nread);
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}
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struct SSL_CTX_Deleter
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{
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void operator()(SSL_CTX *ctx)
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{
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SSL_CTX_free(ctx);
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}
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};
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using UniqueSSLCTX = std::unique_ptr<SSL_CTX, SSL_CTX_Deleter>;
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static std::string ssl_errors_string(bool lastonly = true)
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{
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std::string err;
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const char *file, *data, *func;
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int line, flags;
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while (true)
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{
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unsigned long code = ERR_get_error_all(&file, &line, &func, &data, &flags);
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if (code == 0)
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break;
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std::string reason;
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if (ERR_SYSTEM_ERROR(code))
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{
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reason = strerror_str(ERR_GET_REASON(code));
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}
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else
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{
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const char *rc = ERR_reason_error_string(code);
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reason = (rc == nullptr) ? "unknown" : rc;
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}
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if (err.empty() || lastonly)
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{
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err = reason;
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}
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else
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{
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err = err + ", " + reason;
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}
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if (data != nullptr)
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{
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err = err + " " + data;
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}
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}
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return err;
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}
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void assert_ssl_errors_empty()
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{
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int code = ERR_peek_error();
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if (code != 0)
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{
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std::cerr << "SSL should not have errors at this point." << std::endl;
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ERR_print_errors_fp(stderr);
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exit(1);
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}
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}
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static int ssl_ctx_use_certificate_str(SSL_CTX *ctx, const char *str)
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{
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BIO *bio = BIO_new(BIO_s_mem());
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BIO_puts(bio, str);
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X509 *certificate = PEM_read_bio_X509(bio, NULL, NULL, NULL);
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BIO_free(bio);
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int status = SSL_CTX_use_certificate(ctx, certificate);
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X509_free(certificate);
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return status;
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}
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static int ssl_ctx_use_privatekey_str(SSL_CTX *ctx, const char *str)
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{
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BIO *bio = BIO_new(BIO_s_mem());
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BIO_puts(bio, str);
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EVP_PKEY *pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
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BIO_free(bio);
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int status = SSL_CTX_use_PrivateKey(ctx, pkey);
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EVP_PKEY_free(pkey);
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return status;
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}
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static void ssl_ctx_use_dummycert(SSL_CTX *ctx)
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{
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if (ssl_ctx_use_certificate_str(ctx, dummycert::certificate) <= 0)
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{
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ERR_print_errors_fp(stderr);
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exit(1);
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}
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if (ssl_ctx_use_privatekey_str(ctx, dummycert::privatekey) <= 0)
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{
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ERR_print_errors_fp(stderr);
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exit(1);
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}
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}
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class Driver
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{
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public:
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enum ChanState
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{
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CHAN_INACTIVE,
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CHAN_PLAINTEXT,
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CHAN_SSL_CONNECTING,
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CHAN_SSL_ACCEPTING,
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CHAN_SSL_READWRITE,
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};
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struct ChanInfo
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{
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int chid;
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SOCKET socket;
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SSL *ssl;
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ChanState state;
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int nbytes;
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const char *bytes;
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bool released;
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bool just_released;
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bool ready_now;
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bool ready_on_pollin;
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bool ready_on_pollout;
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bool ready_on_outgoing;
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int last_write_nbytes;
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};
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std::vector<ChanInfo> chans_;
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std::map<int, SOCKET> listen_sockets_;
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bool read_console_recently_;
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std::unique_ptr<char[]> chbuf_;
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std::unique_ptr<struct pollfd[]> pollvec_;
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drv::ReplayRecorder recorder_;
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UniqueSSLCTX ssl_server_ctx_;
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UniqueSSLCTX ssl_client_secure_ctx_;
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UniqueSSLCTX ssl_client_insecure_ctx_;
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void handle_listen_ports()
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{
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const auto &listenports = recorder_.drv_get_listen_ports();
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for (int port : listenports)
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{
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if (listen_sockets_.find(port) == listen_sockets_.end())
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{
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std::string err;
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SOCKET sock = listen_on_port(port, err);
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if_error_print_and_exit(err);
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assert(sock != INVALID_SOCKET);
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listen_sockets_[port] = sock;
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}
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}
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}
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void handle_lua_source()
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{
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if (recorder_.drv_get_rescan_lua_source())
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{
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std::string err;
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std::string_view ctrl = read_file("lua/control.lst", chbuf_.get(), CHBUF_SIZE, err);
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if_error_print_and_exit(err);
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std::vector<std::string> names = drv::parse_control_lst(ctrl);
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recorder_.drv_clear_lua_source();
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for (const std::string &str : names)
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{
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std::string lfn = std::string("lua/") + str;
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std::string_view data = read_file(lfn.c_str(), chbuf_.get(), CHBUF_SIZE, err);
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if_error_print_and_exit(err);
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recorder_.drv_add_lua_source(str, data);
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}
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}
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}
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void close_channel(ChanInfo &chan, std::string_view err)
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{
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// std::cerr << "Closing channel " << chan.chid << std::endl;
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assert(chan.state != CHAN_INACTIVE);
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// Close and release the SSL channel.
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if (chan.ssl != nullptr)
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{
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SSL_free(chan.ssl);
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chan.ssl = nullptr;
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}
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// Close and release the socket.
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assert(chan.socket != INVALID_SOCKET);
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assert(socket_close(chan.socket) == 0);
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chan.socket = INVALID_SOCKET;
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// Close everything else.
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recorder_.drv_notify_close(chan.chid, err);
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chan.state = CHAN_INACTIVE;
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chan.chid = -1;
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chan.nbytes = 0;
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chan.bytes = 0;
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chan.released = false;
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chan.just_released = false;
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chan.ready_now = false;
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chan.ready_on_pollin = false;
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chan.ready_on_pollout = false;
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chan.ready_on_outgoing = false;
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chan.last_write_nbytes = 0;
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}
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void cleanup_channels()
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{
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for (int i = 0; i < int(chans_.size());)
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{
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if (chans_[i].state == CHAN_INACTIVE)
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{
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chans_[i] = chans_.back();
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chans_.pop_back();
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}
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else
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{
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i += 1;
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}
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}
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}
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void handle_console_output()
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{
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while (true)
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{
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std::string_view s = recorder_.drv_peek_outgoing(0);
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if (s.size() == 0)
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break;
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int nwrote = console_write(s.data(), s.size());
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if (nwrote <= 0)
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break;
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recorder_.drv_sent_outgoing(0, nwrote);
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}
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}
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void handle_console_input()
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{
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char buffer[256];
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read_console_recently_ = false;
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while (true)
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{
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int nread = console_read(buffer, 256);
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if (nread <= 0)
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break;
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read_console_recently_ = true;
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recorder_.drv_recv_incoming(0, std::string_view(buffer, nread));
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}
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}
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void make_channel(SOCKET sock, int chid, SSL_CTX *ctx, ChanState state)
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{
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ChanInfo newchan;
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newchan.chid = chid;
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newchan.socket = sock;
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newchan.ssl = SSL_new(ctx);
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newchan.state = state;
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newchan.nbytes = 0;
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newchan.bytes = 0;
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newchan.released = false;
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newchan.just_released = false;
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newchan.ready_now = false;
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newchan.ready_on_pollin = false;
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newchan.ready_on_pollout = true;
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newchan.ready_on_outgoing = false;
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newchan.last_write_nbytes = 0;
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SSL_set_fd(newchan.ssl, newchan.socket);
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// SSL_set_msg_callback(newchan.ssl, SSL_trace);
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// SSL_set_msg_callback_arg(newchan.ssl, BIO_new_fp(stderr,0));
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chans_.push_back(newchan);
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}
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void handle_new_outgoing_sockets()
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{
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const auto &chans = recorder_.drv_get_new_outgoing();
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for (int chid : chans)
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{
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std::string err, cert, host, port;
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std::string target(recorder_.drv_get_target(chid));
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drv::split_target(target, cert, host, port);
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if (cert.empty() || host.empty() || port.empty()) {
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recorder_.drv_notify_close(chid, std::string("invalid target: ") + target);
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continue;
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}
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SSL_CTX *ctx = nullptr;
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if (cert == "cert") {
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ctx = ssl_client_secure_ctx_.get();
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} else if (cert == "nocert") {
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ctx = ssl_client_insecure_ctx_.get();
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} else {
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recorder_.drv_notify_close(chid, std::string("invalid cert rule: ") + target);
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continue;
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}
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SOCKET sock = open_connection(host.c_str(), port.c_str(), err);
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if (sock == INVALID_SOCKET)
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{
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recorder_.drv_notify_close(chid, err);
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continue;
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}
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// std::cerr << "Opening channel " << chid << std::endl;
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make_channel(sock, chid, ctx, CHAN_SSL_CONNECTING);
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}
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if (!chans.empty())
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{
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recorder_.drv_clear_new_outgoing();
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}
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}
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void accept_connection(int port, SOCKET sock)
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{
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std::string err;
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SOCKET socket = accept_on_socket(sock, err);
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if_error_print_and_exit(err);
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if (socket != INVALID_SOCKET)
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{
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int chid = recorder_.drv_notify_accept(port);
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// std::cerr << "Accepted channel " << chid << std::endl;
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make_channel(socket, chid, ssl_server_ctx_.get(), CHAN_SSL_ACCEPTING);
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}
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}
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void advance_plaintext(ChanInfo &chan)
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{
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std::string err;
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// If the channel has no outgoing bytes and has been released,
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// just close it.
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if (chan.released)
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{
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close_channel(chan, "");
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return;
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}
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// Try to write plaintext to the channel.
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std::string_view s = recorder_.drv_peek_outgoing(chan.chid);
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if (s.size() > 0)
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{
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int sbytes = s.size();
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if (sbytes > 65536)
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sbytes = 65536;
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int wbytes = socket_send(chan.socket, s.data(), sbytes, err);
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if (wbytes < 0)
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{
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close_channel(chan, err);
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}
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else
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{
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recorder_.drv_sent_outgoing(chan.chid, wbytes);
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}
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}
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// Try to read plaintext from the channel.
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// Someday, find a way to avoid this copy.
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int nrecv = socket_recv(chan.socket, chbuf_.get(), 65536, err);
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if (nrecv < 0)
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{
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close_channel(chan, err);
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}
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else
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{
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recorder_.drv_recv_incoming(chan.chid, std::string_view(chbuf_.get(), nrecv));
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}
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// Update the ready-flags for next time.
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chan.ready_on_outgoing = true;
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chan.ready_on_pollin = true;
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}
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void process_ssl_error(ChanInfo &chan, int retval)
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{
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int error = SSL_get_error(chan.ssl, retval);
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// std::cerr << "SSL error code = " << error << " ";
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if (error == SSL_ERROR_WANT_READ)
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{
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chan.ready_on_pollin = true;
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}
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else if (error == SSL_ERROR_WANT_WRITE)
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{
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chan.ready_on_pollout = true;
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}
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else
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{
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close_channel(chan, ssl_errors_string());
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}
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}
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|
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void advance_ssl_connecting(ChanInfo &chan)
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{
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// std::cerr << "In advance_ssl_connecting" << std::endl;
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int retval = SSL_connect(chan.ssl);
|
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if (retval == 1)
|
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{
|
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// Connection successful.
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chan.state = CHAN_SSL_READWRITE;
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chan.ready_now = true;
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}
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else
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{
|
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// std::cerr << "ssl_connect_error";
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process_ssl_error(chan, retval);
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}
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}
|
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|
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void advance_ssl_accepting(ChanInfo &chan)
|
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{
|
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// std::cerr << "In advance_ssl_accepting" << std::endl;
|
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int retval = SSL_accept(chan.ssl);
|
|
if (retval == 1)
|
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{
|
|
// Connection successful.
|
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chan.state = CHAN_SSL_READWRITE;
|
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chan.ready_now = true;
|
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}
|
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else
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{
|
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process_ssl_error(chan, retval);
|
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}
|
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}
|
|
|
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void advance_ssl_readwrite(ChanInfo &chan)
|
|
{
|
|
// std::cerr << "In advance_ssl_readwrite" << std::endl;
|
|
// Try to read data.
|
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int read_result = SSL_read(chan.ssl, chbuf_.get(), 65536);
|
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if (read_result > 0)
|
|
{
|
|
recorder_.drv_recv_incoming(chan.chid, std::string_view(chbuf_.get(), read_result));
|
|
chan.ready_now = true;
|
|
}
|
|
else
|
|
{
|
|
process_ssl_error(chan, read_result);
|
|
if (chan.state == CHAN_INACTIVE)
|
|
return;
|
|
}
|
|
|
|
// Try to write data.
|
|
int wbytes;
|
|
if (chan.last_write_nbytes > 0)
|
|
{
|
|
wbytes = chan.last_write_nbytes;
|
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assert(wbytes < chan.nbytes);
|
|
}
|
|
else
|
|
{
|
|
wbytes = chan.nbytes;
|
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if (wbytes > 65536)
|
|
wbytes = 65536;
|
|
}
|
|
if (wbytes > 0)
|
|
{
|
|
int write_result = SSL_write(chan.ssl, chan.bytes, wbytes);
|
|
if (write_result > 0)
|
|
{
|
|
recorder_.drv_sent_outgoing(chan.chid, write_result);
|
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chan.last_write_nbytes = 0;
|
|
chan.ready_on_outgoing = true;
|
|
}
|
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else
|
|
{
|
|
chan.last_write_nbytes = wbytes;
|
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process_ssl_error(chan, write_result);
|
|
if (chan.state == CHAN_INACTIVE)
|
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return;
|
|
}
|
|
}
|
|
else
|
|
{
|
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chan.ready_on_outgoing = true;
|
|
}
|
|
// std::cerr << "rpi=" << chan.ready_on_pollin << ".rpo=" << chan.ready_on_pollout << ".rn=" << chan.ready_now << ".rog=" << chan.ready_on_outgoing << " ";
|
|
}
|
|
|
|
void advance_channel(ChanInfo &chan)
|
|
{
|
|
assert_ssl_errors_empty();
|
|
switch (chan.state)
|
|
{
|
|
case CHAN_PLAINTEXT:
|
|
advance_plaintext(chan);
|
|
break;
|
|
case CHAN_SSL_CONNECTING:
|
|
advance_ssl_connecting(chan);
|
|
break;
|
|
case CHAN_SSL_ACCEPTING:
|
|
advance_ssl_accepting(chan);
|
|
break;
|
|
case CHAN_SSL_READWRITE:
|
|
advance_ssl_readwrite(chan);
|
|
break;
|
|
default:
|
|
assert(false);
|
|
break;
|
|
}
|
|
assert_ssl_errors_empty();
|
|
}
|
|
|
|
void handle_socket_input_output()
|
|
{
|
|
std::string err;
|
|
int mstimeout = read_console_recently_ ? 100 : 1000;
|
|
|
|
// Peek output buffers and determine channel release flags.
|
|
for (ChanInfo &chan : chans_)
|
|
{
|
|
std::string_view s = recorder_.drv_peek_outgoing(chan.chid);
|
|
chan.nbytes = s.size();
|
|
chan.bytes = s.data();
|
|
chan.just_released = false;
|
|
if ((chan.nbytes == 0) && (!chan.released))
|
|
{
|
|
chan.released = recorder_.drv_get_channel_released(chan.chid);
|
|
chan.just_released = chan.released;
|
|
}
|
|
}
|
|
|
|
// Construct the struct pollfd vector.
|
|
int pollsize = 0;
|
|
for (const auto &p : listen_sockets_)
|
|
{
|
|
struct pollfd &pfd = pollvec_[pollsize++];
|
|
pfd.fd = p.second;
|
|
pfd.events = POLLIN;
|
|
pfd.revents = 0;
|
|
}
|
|
for (const ChanInfo &chan : chans_)
|
|
{
|
|
struct pollfd &pfd = pollvec_[pollsize++];
|
|
assert(chan.socket != INVALID_SOCKET);
|
|
pfd.fd = chan.socket;
|
|
pfd.events = 0;
|
|
pfd.revents = 0;
|
|
if (chan.ready_now)
|
|
mstimeout = 0;
|
|
if (chan.just_released)
|
|
mstimeout = 0;
|
|
if (chan.ready_on_pollin)
|
|
pfd.events |= POLLIN;
|
|
if (chan.ready_on_pollout)
|
|
pfd.events |= POLLOUT;
|
|
if (chan.ready_on_outgoing && (chan.nbytes > 0))
|
|
pfd.events |= POLLOUT;
|
|
// std::cerr << "evt=" << pfd.events << ".nb=" << chan.nbytes << " ";
|
|
}
|
|
|
|
// Do the poll.
|
|
socket_poll(pollvec_.get(), pollsize, mstimeout, err);
|
|
if_error_print_and_exit(err);
|
|
|
|
// Check listening sockets.
|
|
int index = 0;
|
|
for (auto &p : listen_sockets_)
|
|
{
|
|
struct pollfd &pfd = pollvec_[index++];
|
|
if (pfd.revents & (POLLIN | POLLERR))
|
|
{
|
|
accept_connection(p.first, p.second);
|
|
}
|
|
}
|
|
|
|
// Advance channels where possible.
|
|
for (ChanInfo &chan : chans_)
|
|
{
|
|
struct pollfd &pfd = pollvec_[index++];
|
|
bool pollin = ((pfd.revents & POLLIN) != 0);
|
|
bool pollout = ((pfd.revents & POLLOUT) != 0);
|
|
bool pollerr = ((pfd.revents & (POLLERR | POLLHUP)) != 0);
|
|
if (chan.ready_now || pollerr || chan.just_released ||
|
|
(chan.ready_on_pollin && pollin) ||
|
|
(chan.ready_on_pollout && pollout) ||
|
|
(chan.ready_on_outgoing && (chan.nbytes > 0) && pollout))
|
|
{
|
|
chan.ready_now = false;
|
|
chan.ready_on_pollin = false;
|
|
chan.ready_on_pollout = false;
|
|
chan.ready_on_outgoing = false;
|
|
advance_channel(chan);
|
|
}
|
|
chan.nbytes = 0;
|
|
chan.bytes = 0;
|
|
}
|
|
|
|
// Delete any newly-inactive channels
|
|
cleanup_channels();
|
|
}
|
|
|
|
int replay_logfile(const char *fn, bool verbose)
|
|
{
|
|
drv::ReplayPlayer player;
|
|
player.open_logfile(fn);
|
|
if (verbose)
|
|
{
|
|
player.enable_stdout();
|
|
}
|
|
while (true)
|
|
{
|
|
drv::ReplayPlayer::Status st = player.step();
|
|
if (st != drv::ReplayPlayer::ST_REPLAYING)
|
|
{
|
|
player.print_status(std::cerr);
|
|
return (st == drv::ReplayPlayer::ST_CLEAN_EXIT) ? 0 : 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
int drive(int argc, char *argv[])
|
|
{
|
|
// Remove the program name from argv.
|
|
if (argc < 1)
|
|
{
|
|
DrivenEngine::print_usage(std::cerr, "<unknown>");
|
|
exit(1);
|
|
}
|
|
std::string program = argv[0];
|
|
argc -= 1;
|
|
argv += 1;
|
|
|
|
// If argv contains "replay <filename>", do a replay,
|
|
// and then skip everything else.
|
|
if (argc >= 1)
|
|
{
|
|
std::string cmd(argv[0]);
|
|
if ((cmd == "replay") || (cmd == "vreplay"))
|
|
{
|
|
if (argc != 2)
|
|
{
|
|
std::cerr << "usage: " << program << " replay <filename>" << std::endl;
|
|
return 1;
|
|
}
|
|
return replay_logfile(argv[1], cmd == "vreplay");
|
|
}
|
|
}
|
|
|
|
// If argv contains "record <filename>", start recording,
|
|
// and remove the "record <filename>" from argv.
|
|
if (argc >= 1)
|
|
{
|
|
std::string cmd = argv[0];
|
|
if (cmd == "record")
|
|
{
|
|
if (argc < 2)
|
|
{
|
|
DrivenEngine::print_usage(std::cerr, program);
|
|
return 1;
|
|
}
|
|
bool ok = recorder_.open_logfile(argv[1]);
|
|
if (!ok)
|
|
{
|
|
std::cerr << "Could not open logfile: " << argv[1] << std::endl;
|
|
return 1;
|
|
}
|
|
argc -= 2;
|
|
argv += 2;
|
|
}
|
|
}
|
|
|
|
// Create the engine.
|
|
if (argc < 1)
|
|
{
|
|
DrivenEngine::print_usage(std::cerr, program);
|
|
return 1;
|
|
}
|
|
bool engine_made = recorder_.create_engine(argv[0]);
|
|
if (!engine_made)
|
|
{
|
|
DrivenEngine::print_usage(std::cerr, program);
|
|
return 1;
|
|
}
|
|
|
|
read_console_recently_ = false;
|
|
|
|
chbuf_.reset(new char[CHBUF_SIZE]);
|
|
pollvec_.reset(new struct pollfd[POLLVEC_SIZE]);
|
|
|
|
ssl_server_ctx_.reset(new_ssl_server_context());
|
|
ssl_client_secure_ctx_.reset(new_ssl_client_context(SSL_VERIFY_PEER));
|
|
ssl_client_insecure_ctx_.reset(new_ssl_client_context(SSL_VERIFY_NONE));
|
|
assert_ssl_errors_empty();
|
|
|
|
handle_lua_source();
|
|
recorder_.drv_invoke_event_init(argc, argv);
|
|
handle_listen_ports();
|
|
|
|
while (!recorder_.drv_get_stop_driver())
|
|
{
|
|
handle_lua_source();
|
|
handle_console_output();
|
|
handle_new_outgoing_sockets();
|
|
handle_socket_input_output();
|
|
handle_console_input();
|
|
handle_console_output();
|
|
recorder_.drv_invoke_event_update(monoclock.get());
|
|
}
|
|
|
|
for (ChanInfo &chan : chans_)
|
|
{
|
|
close_channel(chan, "");
|
|
}
|
|
|
|
DrivenEngine::set(nullptr);
|
|
recorder_.clean_exit();
|
|
return 0;
|
|
}
|
|
};
|