text: /*
    +----------------------------------------------------------------------+
    | Swoole                                                               |
    +----------------------------------------------------------------------+
    | This source file is subject to version 2.0 of the Apache license,    |
    | that is bundled with this package in the file LICENSE, and is        |
    | available through the world-wide-web at the following url:           |
    | http://www.apache.org/licenses/LICENSE-2.0.html                      |
    | If you did not receive a copy of the Apache2.0 license and are unable|
    | to obtain it through the world-wide-web, please send a note to       |
    | license@swoole.com so we can mail you a copy immediately.            |
    +----------------------------------------------------------------------+
    | Author:   Tianfeng Han  <mikan.tenny@gmail.com>                      |
    +----------------------------------------------------------------------+
   */
  #include "php_swoole_cxx.h"
  #include "swoole_socket.h"
  #include "swoole_util.h"
  
  #include "thirdparty/php/standard/proc_open.h"
  #include "thirdparty/php/curl/curl_arginfo.h"
  
  #include <unordered_map>
  #include <initializer_list>
  
  /* openssl */
  #ifndef OPENSSL_NO_ECDH
  #define HAVE_ECDH 1
  #endif
  #ifndef OPENSSL_NO_TLSEXT
  #define HAVE_TLS_SNI 1
  #if OPENSSL_VERSION_NUMBER >= 0x10002000L
  #define HAVE_TLS_ALPN 1
  #endif
  #endif
  #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
  #define HAVE_SEC_LEVEL 1
  #endif
  
  #if PHP_VERSION_ID < 70400
  typedef size_t php_stream_size_t;
  #else
  typedef ssize_t php_stream_size_t;
  #endif
  
  using swoole::Coroutine;
  using swoole::PHPCoroutine;
  using swoole::coroutine::Socket;
  using swoole::coroutine::System;
  using swoole::coroutine::PollSocket;
  
  SW_EXTERN_C_BEGIN
  static PHP_METHOD(swoole_runtime, enableCoroutine);
  static PHP_METHOD(swoole_runtime, getHookFlags);
  static PHP_METHOD(swoole_runtime, setHookFlags);
  static PHP_FUNCTION(swoole_sleep);
  static PHP_FUNCTION(swoole_usleep);
  static PHP_FUNCTION(swoole_time_nanosleep);
  static PHP_FUNCTION(swoole_time_sleep_until);
  static PHP_FUNCTION(swoole_stream_select);
  static PHP_FUNCTION(swoole_stream_socket_pair);
  static PHP_FUNCTION(swoole_user_func_handler);
  
  #ifdef SW_USE_CURL
  void swoole_native_curl_init(int module_number);
  void swoole_native_curl_shutdown();
  #endif
  
  SW_EXTERN_C_END
  
  static int socket_set_option(php_stream *stream, int option, int value, void *ptrparam);
  static php_stream_size_t socket_read(php_stream *stream, char *buf, size_t count);
  static php_stream_size_t socket_write(php_stream *stream, const char *buf, size_t count);
  static int socket_flush(php_stream *stream);
  static int socket_close(php_stream *stream, int close_handle);
  static int socket_stat(php_stream *stream, php_stream_statbuf *ssb);
  static int socket_cast(php_stream *stream, int castas, void **ret);
  
  // clang-format off
  
  ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_void, 0, 0, 0)
  ZEND_END_ARG_INFO()
  
  ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_runtime_enableCoroutine, 0, 0, 0)
      ZEND_ARG_INFO(0, enable)
      ZEND_ARG_INFO(0, flags)
  ZEND_END_ARG_INFO()
  
  ZEND_BEGIN_ARG_INFO_EX(arginfo_swoole_runtime_setHookFlags, 0, 0, 1)
      ZEND_ARG_INFO(0, flags)
  ZEND_END_ARG_INFO()
  
  static zend_class_entry *swoole_runtime_ce;
  
  static php_stream_ops socket_ops {
      socket_write,
      socket_read,
      socket_close,
      socket_flush,
      "tcp_socket/coroutine",
      nullptr, /* seek */
      socket_cast,
      socket_stat,
      socket_set_option,
  };
  
  struct php_swoole_netstream_data_t {
      php_netstream_data_t stream;
      Socket *socket;
      bool blocking;
  };
  
  static bool runtime_hook_init = false;
  static int runtime_hook_flags = 0;
  
  static struct {
      php_stream_transport_factory tcp;
      php_stream_transport_factory udp;
      php_stream_transport_factory _unix;
      php_stream_transport_factory udg;
      php_stream_transport_factory ssl;
      php_stream_transport_factory tls;
  } ori_factory = {
      nullptr,
      nullptr,
      nullptr,
      nullptr,
      nullptr,
      nullptr,
  };
  
  static std::vector<std::string> unsafe_functions {
      "pcntl_fork",
      "pcntl_wait",
      "pcntl_waitpid",
      "pcntl_sigtimedwait",
  };
  
  static const zend_function_entry swoole_runtime_methods[] =
  {
      PHP_ME(swoole_runtime, enableCoroutine, arginfo_swoole_runtime_enableCoroutine, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
      PHP_ME(swoole_runtime, getHookFlags, arginfo_swoole_void, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
      PHP_ME(swoole_runtime, setHookFlags, arginfo_swoole_runtime_setHookFlags, ZEND_ACC_PUBLIC | ZEND_ACC_STATIC)
      PHP_FE_END
  };
  // clang-format on
  
  static php_stream_wrapper ori_php_plain_files_wrapper;
  static php_stream_ops ori_php_stream_stdio_ops;
  
  static void hook_func(const char *name, size_t l_name, zif_handler handler = nullptr, zend_internal_arg_info *arg_info = nullptr);
  static void unhook_func(const char *name, size_t l_name);
  static bool hook_internal_functions(const zend_function_entry *fes);
  
  #define SW_HOOK_FUNC(f) hook_func(ZEND_STRL(#f), PHP_FN(swoole_##f))
  #define SW_UNHOOK_FUNC(f) unhook_func(ZEND_STRL(#f))
  
  static zend_array *tmp_function_table = nullptr;
  
  SW_EXTERN_C_BEGIN
  #include "ext/standard/file.h"
  #include "thirdparty/php/streams/plain_wrapper.c"
  SW_EXTERN_C_END
  
  void php_swoole_runtime_minit(int module_number) {
      SW_INIT_CLASS_ENTRY_BASE(
          swoole_runtime, "Swoole\\Runtime", "swoole_runtime", nullptr, swoole_runtime_methods, nullptr);
      SW_SET_CLASS_CREATE(swoole_runtime, sw_zend_create_object_deny);
  
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_TCP", PHPCoroutine::HOOK_TCP);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_UDP", PHPCoroutine::HOOK_UDP);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_UNIX", PHPCoroutine::HOOK_UNIX);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_UDG", PHPCoroutine::HOOK_UDG);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_SSL", PHPCoroutine::HOOK_SSL);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_TLS", PHPCoroutine::HOOK_TLS);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_STREAM_FUNCTION", PHPCoroutine::HOOK_STREAM_FUNCTION);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_STREAM_SELECT", PHPCoroutine::HOOK_STREAM_FUNCTION);  // backward compatibility
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_FILE", PHPCoroutine::HOOK_FILE);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_STDIO", PHPCoroutine::HOOK_STDIO);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_SLEEP", PHPCoroutine::HOOK_SLEEP);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_PROC", PHPCoroutine::HOOK_PROC);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_CURL", PHPCoroutine::HOOK_CURL);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_NATIVE_CURL", PHPCoroutine::HOOK_NATIVE_CURL);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_BLOCKING_FUNCTION", PHPCoroutine::HOOK_BLOCKING_FUNCTION);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_SOCKETS", PHPCoroutine::HOOK_SOCKETS);
      SW_REGISTER_LONG_CONSTANT("SWOOLE_HOOK_ALL", PHPCoroutine::HOOK_ALL);
  #ifdef SW_USE_CURL
      swoole_native_curl_init(module_number);
  #endif
      swoole_proc_open_init(module_number);
  }
  
  struct real_func {
      zend_function *function;
      zif_handler ori_handler;
      zend_internal_arg_info *ori_arg_info;
      uint32_t ori_fn_flags;
      uint32_t ori_num_args;
      zend_fcall_info_cache *fci_cache;
      zval name;
  };
  
  void php_swoole_runtime_rinit() {
      tmp_function_table = (zend_array *) emalloc(sizeof(zend_array));
      zend_hash_init(tmp_function_table, 8, nullptr, nullptr, 0);
  }
  
  void php_swoole_runtime_rshutdown() {
      void *ptr;
      ZEND_HASH_FOREACH_PTR(tmp_function_table, ptr) {
          real_func *rf = reinterpret_cast<real_func *>(ptr);
          /**
           * php library function
           */
          if (rf->fci_cache) {
              zval_dtor(&rf->name);
              efree(rf->fci_cache);
          }
          rf->function->internal_function.handler = rf->ori_handler;
          efree(rf);
      }
      ZEND_HASH_FOREACH_END();
      zend_hash_destroy(tmp_function_table);
      efree(tmp_function_table);
      tmp_function_table = nullptr;
  }
  
  void php_swoole_runtime_mshutdown() {
  #ifdef SW_USE_CURL
      swoole_native_curl_shutdown();
  #endif
  }
  
  static inline char *parse_ip_address_ex(const char *str, size_t str_len, int *portno, int get_err, zend_string **err) {
      char *colon;
      char *host = nullptr;
      char *p;
  
      if (*(str) == '[' && str_len > 1) {
          /* IPV6 notation to specify raw address with port (i.e. [fe80::1]:80) */
          p = (char *) memchr(str + 1, ']', str_len - 2);
          if (!p || *(p + 1) != ':') {
              if (get_err) {
                  *err = strpprintf(0, "Failed to parse IPv6 address \"%s\"", str);
              }
              return nullptr;
          }
          *portno = atoi(p + 2);
          return estrndup(str + 1, p - str - 1);
      }
      if (str_len) {
          colon = (char *) memchr(str, ':', str_len - 1);
      } else {
          colon = nullptr;
      }
      if (colon) {
          *portno = atoi(colon + 1);
          host = estrndup(str, colon - str);
      } else {
          if (get_err) {
              *err = strpprintf(0, "Failed to parse address \"%s\"", str);
          }
          return nullptr;
      }
  
      return host;
  }
  
  static php_stream_size_t socket_write(php_stream *stream, const char *buf, size_t count) {
      php_swoole_netstream_data_t *abstract;
      Socket *sock;
      ssize_t didwrite = -1;
  
      abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract)) {
          goto _exit;
      }
  
      sock = (Socket *) abstract->socket;
      if (UNEXPECTED(!sock)) {
          goto _exit;
      }
  
      if (abstract->blocking) {
          didwrite = sock->send_all(buf, count);
      } else {
          didwrite = sock->get_socket()->send(buf, count, 0);
          sock->set_err(errno);
      }
  
      if (didwrite < 0 || (size_t) didwrite != count) {
          /* we do not expect the outer layer to continue to call the send syscall in a loop
           * and didwrite is meaningless if it failed */
          didwrite = -1;
          abstract->stream.timeout_event = (sock->errCode == ETIMEDOUT);
          php_error_docref(NULL,
                           E_NOTICE,
                           "Send of " ZEND_LONG_FMT " bytes failed with errno=%d %s",
                           (zend_long) count,
                           sock->errCode,
                           sock->errMsg);
      } else {
          php_stream_notify_progress_increment(PHP_STREAM_CONTEXT(stream), didwrite, 0);
      }
  
      if (didwrite < 0) {
          if (sock->errCode == ETIMEDOUT || sock->get_socket()->catch_error(sock->errCode) == SW_WAIT) {
              didwrite = 0;
          } else {
              stream->eof = 1;
          }
      } else if (didwrite == 0) {
          stream->eof = 1;
      }
  
  _exit:
  #if PHP_VERSION_ID < 70400
      if (didwrite < 0) {
          didwrite = 0;
      }
  #endif
      return didwrite;
  }
  
  static php_stream_size_t socket_read(php_stream *stream, char *buf, size_t count)
  {
      php_swoole_netstream_data_t *abstract;
      Socket *sock;
      ssize_t nr_bytes = -1;
  
      abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract)) {
          goto _exit;
      }
  
      sock = (Socket *) abstract->socket;
      if (UNEXPECTED(!sock)) {
          goto _exit;
      }
  
      if (abstract->blocking) {
          nr_bytes =  sock->recv(buf, count);
      } else {
          nr_bytes = sock->get_socket()->recv(buf, count, 0);
          sock->set_err(errno);
      }
  
      if (nr_bytes > 0) {
          php_stream_notify_progress_increment(PHP_STREAM_CONTEXT(stream), nr_bytes, 0);
      }
  
      if (nr_bytes < 0) {
          if (sock->errCode == ETIMEDOUT || sock->get_socket()->catch_error(sock->errCode) == SW_WAIT) {
              nr_bytes = 0;
          } else {
              stream->eof = 1;
          }
      } else if (nr_bytes == 0) {
          stream->eof = 1;
      }
  
  _exit:
  #if PHP_VERSION_ID < 70400
      if (nr_bytes < 0) {
          nr_bytes = 0;
      }
  #endif
      return nr_bytes;
  }
  
  static int socket_flush(php_stream *stream) {
      return 0;
  }
  
  static int socket_close(php_stream *stream, int close_handle) {
      php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract)) {
          return FAILURE;
      }
      /** set it null immediately */
      stream->abstract = nullptr;
      Socket *sock = (Socket *) abstract->socket;
      if (UNEXPECTED(!sock)) {
          return FAILURE;
      }
      /**
       * it's always successful (even if the destructor rule is violated)
       * every calls passes through the hook function in PHP
       * so there is unnecessary to worry about the null pointer.
       */
      sock->close();
      delete sock;
      efree(abstract);
      return SUCCESS;
  }
  
  enum {
      STREAM_XPORT_OP_BIND,
      STREAM_XPORT_OP_CONNECT,
      STREAM_XPORT_OP_LISTEN,
      STREAM_XPORT_OP_ACCEPT,
      STREAM_XPORT_OP_CONNECT_ASYNC,
      STREAM_XPORT_OP_GET_NAME,
      STREAM_XPORT_OP_GET_PEER_NAME,
      STREAM_XPORT_OP_RECV,
      STREAM_XPORT_OP_SEND,
      STREAM_XPORT_OP_SHUTDOWN,
  };
  
  enum { STREAM_XPORT_CRYPTO_OP_SETUP, STREAM_XPORT_CRYPTO_OP_ENABLE };
  
  static int socket_cast(php_stream *stream, int castas, void **ret) {
      php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract)) {
          return FAILURE;
      }
      Socket *sock = (Socket *) abstract->socket;
      if (UNEXPECTED(!sock)) {
          return FAILURE;
      }
  
      switch (castas) {
      case PHP_STREAM_AS_STDIO:
          if (ret) {
              *(FILE **) ret = fdopen(sock->get_fd(), stream->mode);
              if (*ret) {
                  return SUCCESS;
              }
              return FAILURE;
          }
          return SUCCESS;
      case PHP_STREAM_AS_FD_FOR_SELECT:
      case PHP_STREAM_AS_FD:
      case PHP_STREAM_AS_SOCKETD:
          if (ret) *(php_socket_t *) ret = sock->get_fd();
          return SUCCESS;
      default:
          return FAILURE;
      }
  }
  
  static int socket_stat(php_stream *stream, php_stream_statbuf *ssb) {
      php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract)) {
          return FAILURE;
      }
      Socket *sock = (Socket *) abstract->socket;
      if (UNEXPECTED(!sock)) {
          return FAILURE;
      }
      return zend_fstat(sock->get_fd(), &ssb->sb);
  }
  
  static inline int socket_connect(php_stream *stream, Socket *sock, php_stream_xport_param *xparam) {
      char *host = nullptr, *bindto = nullptr;
      int portno = 0, bindport = 0;
      int ret = 0;
      zval *tmpzval = nullptr;
      char *ip_address = nullptr;
  
      if (UNEXPECTED(sock->get_fd() < 0)) {
          return FAILURE;
      }
  
      if (sock->get_socket()->is_inet()) {
          ip_address = parse_ip_address_ex(
              xparam->inputs.name, xparam->inputs.namelen, &portno, xparam->want_errortext, &xparam->outputs.error_text);
          host = ip_address;
          if (sock->get_sock_type() == SOCK_STREAM) {
              sock->get_socket()->set_tcp_nodelay();
          }
      } else {
          host = xparam->inputs.name;
      }
      if (host == nullptr) {
          return FAILURE;
      }
      ON_SCOPE_EXIT {
          if (ip_address) {
              efree(ip_address);
          }
      };
      if (PHP_STREAM_CONTEXT(stream) &&
          (tmpzval = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "socket", "bindto")) != nullptr) {
          if (Z_TYPE_P(tmpzval) != IS_STRING) {
              if (xparam->want_errortext) {
                  xparam->outputs.error_text = strpprintf(0, "local_addr context option is not a string.");
              }
              return FAILURE;
          }
          bindto = parse_ip_address_ex(
              Z_STRVAL_P(tmpzval), Z_STRLEN_P(tmpzval), &bindport, xparam->want_errortext, &xparam->outputs.error_text);
          if (bindto == nullptr) {
              return FAILURE;
          }
          ON_SCOPE_EXIT {
              if (bindto) {
                  efree(bindto);
              }
          };
          if (!sock->bind(bindto, bindport)) {
              return FAILURE;
          }
      }
  
      if (xparam->inputs.timeout) {
          sock->set_timeout(xparam->inputs.timeout, Socket::TIMEOUT_CONNECT);
      }
      if (sock->connect(host, portno) == false) {
          xparam->outputs.error_code = sock->errCode;
          if (sock->errMsg) {
              xparam->outputs.error_text = zend_string_init(sock->errMsg, strlen(sock->errMsg), 0);
          }
          ret = -1;
      }
      return ret;
  }
  
  static inline int socket_bind(php_stream *stream, Socket *sock, php_stream_xport_param *xparam STREAMS_DC) {
      char *host = nullptr;
      int portno = 0;
      char *ip_address = nullptr;
  
      if (sock->get_socket()->is_inet()) {
          ip_address = parse_ip_address_ex(
              xparam->inputs.name, xparam->inputs.namelen, &portno, xparam->want_errortext, &xparam->outputs.error_text);
          host = ip_address;
      } else {
          host = xparam->inputs.name;
      }
      if (host == nullptr) {
          sock->set_err(EINVAL);
          return -1;
      }
      int ret = sock->bind(host, portno) ? 0 : -1;
      if (ip_address) {
          efree(ip_address);
      }
      return ret;
  }
  
  static inline int socket_accept(php_stream *stream, Socket *sock, php_stream_xport_param *xparam STREAMS_DC) {
      int tcp_nodelay = 0;
      zval *tmpzval = nullptr;
  
      xparam->outputs.client = nullptr;
  
      if ((nullptr != PHP_STREAM_CONTEXT(stream)) &&
          (tmpzval = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "socket", "tcp_nodelay")) != nullptr &&
          zval_is_true(tmpzval)) {
          tcp_nodelay = 1;
      }
  
      zend_string **textaddr = xparam->want_textaddr ? &xparam->outputs.textaddr : nullptr;
      struct sockaddr **addr = xparam->want_addr ? &xparam->outputs.addr : nullptr;
      socklen_t *addrlen = xparam->want_addr ? &xparam->outputs.addrlen : nullptr;
  
      struct timeval *timeout = xparam->inputs.timeout;
      zend_string **error_string = xparam->want_errortext ? &xparam->outputs.error_text : nullptr;
      int *error_code = &xparam->outputs.error_code;
  
      int error = 0;
      php_sockaddr_storage sa;
      socklen_t sl = sizeof(sa);
  
      if (timeout) {
          sock->set_timeout(timeout, Socket::TIMEOUT_READ);
      }
  
      Socket *clisock = sock->accept();
  
  #ifdef SW_USE_OPENSSL
      if (clisock != nullptr && clisock->ssl_is_enable()) {
          if (!clisock->ssl_handshake()) {
              sock->errCode = clisock->errCode;
              delete clisock;
              clisock = nullptr;
          }
      }
  #endif
  
      if (clisock == nullptr) {
          error = sock->errCode;
          if (error_code) {
              *error_code = error;
          }
          if (error_string) {
              *error_string = php_socket_error_str(error);
          }
          return FAILURE;
      } else {
          php_network_populate_name_from_sockaddr((struct sockaddr *) &sa, sl, textaddr, addr, addrlen);
  #ifdef TCP_NODELAY
          if (tcp_nodelay) {
              clisock->get_socket()->set_tcp_nodelay(tcp_nodelay);
          }
  #endif
          php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) emalloc(sizeof(*abstract));
          memset(abstract, 0, sizeof(*abstract));
  
          abstract->socket = clisock;
          abstract->blocking = true;
  
          xparam->outputs.client = php_stream_alloc_rel(stream->ops, (void *) abstract, nullptr, "r+");
          if (xparam->outputs.client) {
              xparam->outputs.client->ctx = stream->ctx;
              if (stream->ctx) {
                  GC_ADDREF(stream->ctx);
              }
          }
          return 0;
      }
  }
  
  static inline int socket_recvfrom(
      Socket *sock, char *buf, size_t buflen, zend_string **textaddr, struct sockaddr **addr, socklen_t *addrlen) {
      int ret;
      int want_addr = textaddr || addr;
  
      if (want_addr) {
          php_sockaddr_storage sa;
          socklen_t sl = sizeof(sa);
          ret = sock->recvfrom(buf, buflen, (struct sockaddr *) &sa, &sl);
          if (sl) {
              php_network_populate_name_from_sockaddr((struct sockaddr *) &sa, sl, textaddr, addr, addrlen);
          } else {
              if (textaddr) {
                  *textaddr = ZSTR_EMPTY_ALLOC();
              }
              if (addr) {
                  *addr = nullptr;
                  *addrlen = 0;
              }
          }
      } else {
          ret = sock->recv(buf, buflen);
      }
  
      return ret;
  }
  
  static inline int socket_sendto(
      Socket *sock, const char *buf, size_t buflen, struct sockaddr *addr, socklen_t addrlen) {
      if (addr) {
          return sendto(sock->get_fd(), buf, buflen, 0, addr, addrlen);
      } else {
          return sock->send(buf, buflen);
      }
  }
  
  #ifdef SW_USE_OPENSSL
  
  #define GET_VER_OPT(name)                                                                                              \
      (PHP_STREAM_CONTEXT(stream) &&                                                                                     \
       (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", name)) != nullptr)
  #define GET_VER_OPT_STRING(name, str)                                                                                  \
      if (GET_VER_OPT(name)) {                                                                                           \
          convert_to_string_ex(val);                                                                                     \
          str = Z_STRVAL_P(val);                                                                                         \
      }
  #define GET_VER_OPT_LONG(name, num)                                                                                    \
      if (GET_VER_OPT(name)) {                                                                                           \
          convert_to_long_ex(val);                                                                                       \
          num = Z_LVAL_P(val);                                                                                           \
      }
  
  static int socket_setup_crypto(php_stream *stream, Socket *sock, php_stream_xport_crypto_param *cparam STREAMS_DC) {
      return 0;
  }
  
  static int socket_xport_crypto_setup(php_stream *stream) {
      php_stream_xport_crypto_param param;
      int ret;
  
      memset(&param, 0, sizeof(param));
      param.op = (decltype(param.op)) STREAM_XPORT_CRYPTO_OP_SETUP;
      param.inputs.method = (php_stream_xport_crypt_method_t) 0;
      param.inputs.session = NULL;
  
      ret = php_stream_set_option(stream, PHP_STREAM_OPTION_CRYPTO_API, 0, &param);
  
      if (ret == PHP_STREAM_OPTION_RETURN_OK) {
          return param.outputs.returncode;
      }
  
      php_error_docref("streams.crypto", E_WARNING, "this stream does not support SSL/crypto");
  
      return ret;
  }
  
  static int socket_xport_crypto_enable(php_stream *stream, int activate) {
      php_stream_xport_crypto_param param;
      int ret;
  
      memset(&param, 0, sizeof(param));
      param.op = (decltype(param.op)) STREAM_XPORT_CRYPTO_OP_ENABLE;
      param.inputs.activate = activate;
  
      ret = php_stream_set_option(stream, PHP_STREAM_OPTION_CRYPTO_API, 0, &param);
  
      if (ret == PHP_STREAM_OPTION_RETURN_OK) {
          return param.outputs.returncode;
      }
  
      php_error_docref("streams.crypto", E_WARNING, "this stream does not support SSL/crypto");
  
      return ret;
  }
  
  static bool php_openssl_capture_peer_certs(php_stream *stream, Socket *sslsock) {
      zval *val;
  
      std::string peer_cert = sslsock->ssl_get_peer_cert();
      if (peer_cert.empty()) {
          return false;
      }
  
      zval argv[1];
      ZVAL_STRINGL(&argv[0], peer_cert.c_str(), peer_cert.length());
      zend::function::ReturnValue retval = zend::function::call("openssl_x509_read", 1, argv);
      php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "peer_certificate", &retval.value);
      zval_dtor(&argv[0]);
  
      if (NULL != (val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "capture_peer_cert_chain"))
              && zend_is_true(val)) {
          zval arr;
          auto chain = sslsock->get_socket()->ssl_get_peer_cert_chain(INT_MAX);
  
          if (!chain.empty()) {
              array_init(&arr);
              for (auto &cert : chain) {
                  zval argv[1];
                  ZVAL_STRINGL(&argv[0], cert.c_str(), cert.length());
                  zend::function::ReturnValue retval = zend::function::call("openssl_x509_read", 1, argv);
                  zval_add_ref(&retval.value);
                  add_next_index_zval(&arr, &retval.value);
                  zval_dtor(&argv[0]);
              }
          } else {
              ZVAL_NULL(&arr);
          }
  
          php_stream_context_set_option(PHP_STREAM_CONTEXT(stream), "ssl", "peer_certificate_chain", &arr);
          zval_ptr_dtor(&arr);
      }
  
      return true;
  }
  
  static int socket_enable_crypto(php_stream *stream, Socket *sock, php_stream_xport_crypto_param *cparam STREAMS_DC) {
      if (cparam->inputs.activate && !sock->ssl_is_available()) {
          sock->enable_ssl_encrypt();
          if (!sock->ssl_check_context()) {
              return -1;
          }
          if (!sock->ssl_handshake()) {
              return -1;
          }
          return 0;
      } else if (!cparam->inputs.activate && sock->ssl_is_available()) {
          return sock->ssl_shutdown() ? 0 : -1;
      }
  
      zval *val = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "capture_peer_cert");
      if (val && zend_is_true(val)) {
          return php_openssl_capture_peer_certs(stream, sock) ? 0 : -1;
      }
  
      return 0;
  }
  #endif
  
  static inline int socket_xport_api(php_stream *stream, Socket *sock, php_stream_xport_param *xparam STREAMS_DC) {
      static const int shutdown_how[] = {SHUT_RD, SHUT_WR, SHUT_RDWR};
  
      switch (xparam->op) {
      case STREAM_XPORT_OP_LISTEN: {
          xparam->outputs.returncode = sock->listen(xparam->inputs.backlog) ? 0 : -1;
          break;
      }
      case STREAM_XPORT_OP_CONNECT:
      case STREAM_XPORT_OP_CONNECT_ASYNC:
          xparam->outputs.returncode = socket_connect(stream, sock, xparam);
  #ifdef SW_USE_OPENSSL
          if (sock->ssl_is_enable()
                  && (socket_xport_crypto_setup(stream) < 0 || socket_xport_crypto_enable(stream, 1) < 0)) {
              xparam->outputs.returncode = -1;
          }
  #endif
          break;
      case STREAM_XPORT_OP_BIND: {
          if (sock->get_sock_domain() != AF_UNIX) {
              zval *tmpzval = nullptr;
              php_stream_context *ctx = PHP_STREAM_CONTEXT(stream);
              if (!ctx) {
                  break;
              }
  #ifdef SO_REUSEADDR
              sock->get_socket()->set_reuse_addr();
  #endif
  
  #ifdef IPV6_V6ONLY
              if ((tmpzval = php_stream_context_get_option(ctx, "socket", "ipv6_v6only")) != nullptr &&
                  zval_is_true(tmpzval)) {
                  sock->get_socket()->set_option(IPPROTO_IPV6, IPV6_V6ONLY, 1);
              }
  #endif
  
  #ifdef SO_REUSEPORT
              if ((tmpzval = php_stream_context_get_option(ctx, "socket", "so_reuseport")) != nullptr &&
                  zval_is_true(tmpzval)) {
                  sock->get_socket()->set_reuse_port();
              }
  #endif
  
  #ifdef SO_BROADCAST
              if ((tmpzval = php_stream_context_get_option(ctx, "socket", "so_broadcast")) != nullptr &&
                  zval_is_true(tmpzval)) {
                  sock->set_option(SOL_SOCKET, SO_BROADCAST, 1);
              }
  #endif
          }
          xparam->outputs.returncode = socket_bind(stream, sock, xparam STREAMS_CC);
          break;
      }
      case STREAM_XPORT_OP_ACCEPT:
          xparam->outputs.returncode = socket_accept(stream, sock, xparam STREAMS_CC);
          break;
      case STREAM_XPORT_OP_GET_NAME:
          xparam->outputs.returncode =
              php_network_get_sock_name(sock->get_fd(),
                                        xparam->want_textaddr ? &xparam->outputs.textaddr : nullptr,
                                        xparam->want_addr ? &xparam->outputs.addr : nullptr,
                                        xparam->want_addr ? &xparam->outputs.addrlen : nullptr);
          break;
      case STREAM_XPORT_OP_GET_PEER_NAME:
          xparam->outputs.returncode =
              php_network_get_peer_name(sock->get_fd(),
                                        xparam->want_textaddr ? &xparam->outputs.textaddr : nullptr,
                                        xparam->want_addr ? &xparam->outputs.addr : nullptr,
                                        xparam->want_addr ? &xparam->outputs.addrlen : nullptr);
          break;
  
      case STREAM_XPORT_OP_SEND:
          if ((xparam->inputs.flags & STREAM_OOB) == STREAM_OOB) {
              php_swoole_error(E_WARNING, "STREAM_OOB flags is not supports");
              xparam->outputs.returncode = -1;
              break;
          }
          xparam->outputs.returncode =
              socket_sendto(sock, xparam->inputs.buf, xparam->inputs.buflen, xparam->inputs.addr, xparam->inputs.addrlen);
          if (xparam->outputs.returncode == -1) {
              char *err = php_socket_strerror(php_socket_errno(), nullptr, 0);
              php_error_docref(nullptr, E_WARNING, "%s\n", err);
              efree(err);
          }
          break;
  
      case STREAM_XPORT_OP_RECV:
          if ((xparam->inputs.flags & STREAM_OOB) == STREAM_OOB) {
              php_swoole_error(E_WARNING, "STREAM_OOB flags is not supports");
              xparam->outputs.returncode = -1;
              break;
          }
          if ((xparam->inputs.flags & STREAM_PEEK) == STREAM_PEEK) {
              xparam->outputs.returncode = sock->peek(xparam->inputs.buf, xparam->inputs.buflen);
          } else {
              xparam->outputs.returncode = socket_recvfrom(sock,
                                                           xparam->inputs.buf,
                                                           xparam->inputs.buflen,
                                                           xparam->want_textaddr ? &xparam->outputs.textaddr : nullptr,
                                                           xparam->want_addr ? &xparam->outputs.addr : nullptr,
                                                           xparam->want_addr ? &xparam->outputs.addrlen : nullptr);
          }
          break;
      case STREAM_XPORT_OP_SHUTDOWN:
          xparam->outputs.returncode = sock->shutdown(shutdown_how[xparam->how]);
          break;
      default:
  #ifdef SW_DEBUG
          php_swoole_fatal_error(E_WARNING, "socket_xport_api: unsupported option %d", xparam->op);
  #endif
          break;
      }
      return PHP_STREAM_OPTION_RETURN_OK;
  }
  
  static int socket_set_option(php_stream *stream, int option, int value, void *ptrparam) {
      php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) stream->abstract;
      if (UNEXPECTED(!abstract || !abstract->socket)) {
          return PHP_STREAM_OPTION_RETURN_ERR;
      }
      Socket *sock = (Socket *) abstract->socket;
      switch (option) {
      case PHP_STREAM_OPTION_BLOCKING:
          if (abstract->blocking == (bool) value) {
              break;
          }
          abstract->blocking = (bool) value;
          break;
      case PHP_STREAM_OPTION_XPORT_API: {
          return socket_xport_api(stream, sock, (php_stream_xport_param *) ptrparam STREAMS_CC);
      }
      case PHP_STREAM_OPTION_META_DATA_API: {
  #ifdef SW_USE_OPENSSL
          SSL *ssl = sock->get_socket() ? sock->get_socket()->ssl : nullptr;
          if (ssl) {
              zval tmp;
              const char *proto_str;
              const SSL_CIPHER *cipher;
  
              array_init(&tmp);
              switch (SSL_version(ssl)) {
  #ifdef TLS1_3_VERSION
              case TLS1_3_VERSION:
                  proto_str = "TLSv1.3";
                  break;
  #endif
  #ifdef TLS1_2_VERSION
              case TLS1_2_VERSION:
                  proto_str = "TLSv1.2";
                  break;
  #endif
  #ifdef TLS1_1_VERSION
              case TLS1_1_VERSION:
                  proto_str = "TLSv1.1";
                  break;
  #endif
              case TLS1_VERSION:
                  proto_str = "TLSv1";
                  break;
  #ifdef SSL3_VERSION
              case SSL3_VERSION:
                  proto_str = "SSLv3";
                  break;
  #endif
              default:
                  proto_str = "UNKNOWN";
                  break;
              }
  
              cipher = SSL_get_current_cipher(ssl);
              add_assoc_string(&tmp, "protocol", (char *) proto_str);
              add_assoc_string(&tmp, "cipher_name", (char *) SSL_CIPHER_get_name(cipher));
              add_assoc_long(&tmp, "cipher_bits", SSL_CIPHER_get_bits(cipher, nullptr));
              add_assoc_string(&tmp, "cipher_version", (char *) SSL_CIPHER_get_version(cipher));
              add_assoc_zval((zval *) ptrparam, "crypto", &tmp);
          }
  #endif
          add_assoc_bool((zval *) ptrparam, "timed_out", sock->errCode == ETIMEDOUT);
          add_assoc_bool((zval *) ptrparam, "eof", stream->eof);
          add_assoc_bool((zval *) ptrparam, "blocked", 1);
          break;
      }
      case PHP_STREAM_OPTION_READ_TIMEOUT: {
          abstract->socket->set_timeout((struct timeval *) ptrparam, Socket::TIMEOUT_READ);
          break;
      }
  #ifdef SW_USE_OPENSSL
      case PHP_STREAM_OPTION_CRYPTO_API: {
          php_stream_xport_crypto_param *cparam = (php_stream_xport_crypto_param *) ptrparam;
          switch (cparam->op) {
          case STREAM_XPORT_CRYPTO_OP_SETUP:
              cparam->outputs.returncode = socket_setup_crypto(stream, sock, cparam STREAMS_CC);
              return PHP_STREAM_OPTION_RETURN_OK;
          case STREAM_XPORT_CRYPTO_OP_ENABLE:
              cparam->outputs.returncode = socket_enable_crypto(stream, sock, cparam STREAMS_CC);
              return PHP_STREAM_OPTION_RETURN_OK;
          default:
              /* never here */
              SW_ASSERT(0);
              break;
          }
          break;
      }
  #endif
      case PHP_STREAM_OPTION_CHECK_LIVENESS: {
          return sock->check_liveness() ? PHP_STREAM_OPTION_RETURN_OK : PHP_STREAM_OPTION_RETURN_ERR;
      }
      case PHP_STREAM_OPTION_READ_BUFFER:
      case PHP_STREAM_OPTION_WRITE_BUFFER: {
          // TODO: read/write buffer
          break;
      }
      default:
  #ifdef SW_DEBUG
          php_swoole_fatal_error(E_WARNING, "socket_set_option: unsupported option %d with value %d", option, value);
  #endif
          break;
      }
      return PHP_STREAM_OPTION_RETURN_OK;
  }
  
  static php_stream *socket_create(const char *proto,
                                   size_t protolen,
                                   const char *resourcename,
                                   size_t resourcenamelen,
                                   const char *persistent_id,
                                   int options,
                                   int flags,
                                   struct timeval *timeout,
                                   php_stream_context *context STREAMS_DC) {
      php_stream *stream = nullptr;
      php_swoole_netstream_data_t *abstract = nullptr;
      Socket *sock;
  
      Coroutine::get_current_safe();
  
      if (SW_STREQ(proto, protolen, "tcp")) {
      _tcp:
          sock = new Socket(resourcename[0] == '[' ? SW_SOCK_TCP6 : SW_SOCK_TCP);
      } else if (SW_STREQ(proto, protolen, "ssl") || SW_STREQ(proto, protolen, "tls")) {
  #ifdef SW_USE_OPENSSL
          sock = new Socket(resourcename[0] == '[' ? SW_SOCK_TCP6 : SW_SOCK_TCP);
          sock->enable_ssl_encrypt();
  #else
          php_swoole_error(E_WARNING,
                           "you must configure with `--enable-openssl` to support ssl connection when compiling Swoole");
          return nullptr;
  #endif
      } else if (SW_STREQ(proto, protolen, "unix")) {
          sock = new Socket(SW_SOCK_UNIX_STREAM);
      } else if (SW_STREQ(proto, protolen, "udp")) {
          sock = new Socket(SW_SOCK_UDP);
      } else if (SW_STREQ(proto, protolen, "udg")) {
          sock = new Socket(SW_SOCK_UNIX_DGRAM);
      } else {
          /* abort? */
          goto _tcp;
      }
  
      if (UNEXPECTED(sock->get_fd() < 0)) {
      _failed:
          if (!stream) {
              delete sock;
          } else {
              php_stream_close(stream);
          }
          return nullptr;
      }
  
      sock->set_zero_copy(true);
  
      abstract = (php_swoole_netstream_data_t *) ecalloc(1, sizeof(*abstract));
      abstract->socket = sock;
      abstract->stream.socket = sock->get_fd();
      abstract->blocking = true;
  
      persistent_id = nullptr;  // prevent stream api in user level using pconnect to persist the socket
      stream = php_stream_alloc_rel(&socket_ops, abstract, persistent_id, "r+");
  
      if (stream == nullptr) {
          goto _failed;
      }
  
      if (context && ZVAL_IS_ARRAY(&context->options)) {
  #ifdef SW_USE_OPENSSL
          zval *ztmp;
  
          if (sock->ssl_is_enable() && php_swoole_array_get_value(Z_ARRVAL_P(&context->options), "ssl", ztmp) &&
              ZVAL_IS_ARRAY(ztmp)) {
  
              zval zalias;
              array_init(&zalias);
              zend_array *options = Z_ARRVAL_P(ztmp);
  
              auto add_alias = [&zalias, options](const char *name, const char *alias) {
                  zval *ztmp;
                  if (php_swoole_array_get_value_ex(options, name, ztmp)) {
                      add_assoc_zval_ex(&zalias, alias, strlen(alias), ztmp);
                  }
              };
  
              add_alias("peer_name", "ssl_host_name");
              add_alias("verify_peer", "ssl_verify_peer");
              add_alias("allow_self_signed", "ssl_allow_self_signed");
              add_alias("cafile", "ssl_cafile");
              add_alias("capath", "ssl_capath");
              add_alias("local_cert", "ssl_cert_file");
              add_alias("local_pk", "ssl_key_file");
              add_alias("passphrase", "ssl_passphrase");
              add_alias("verify_depth", "ssl_verify_depth");
              add_alias("disable_compression", "ssl_disable_compression");
  
              php_swoole_socket_set_ssl(sock, &zalias);
              if (!sock->ssl_check_context()) {
                  goto _failed;
              }
              zend_array_destroy(Z_ARRVAL(zalias));
          }
  #endif
      }
  
      return stream;
  }
  
  static ZEND_FUNCTION(swoole_display_disabled_function) {
      zend_error(E_WARNING, "%s() has been disabled for security reasons", get_active_function_name());
  }
  
  static bool disable_func(const char *name, size_t l_name) {
      real_func *rf = (real_func*) zend_hash_str_find_ptr(tmp_function_table, name, l_name);
      if (rf) {
          rf->function->internal_function.handler = ZEND_FN(swoole_display_disabled_function);
          return true;
      }
  
      zend_function *zf = (zend_function*) zend_hash_str_find_ptr(EG(function_table), name, l_name);
      if (zf == nullptr) {
          return false;
      }
  
      rf = (real_func*) emalloc(sizeof(real_func));
      sw_memset_zero(rf, sizeof(*rf));
      rf->function = zf;
      rf->ori_handler = zf->internal_function.handler;
      rf->ori_arg_info = zf->internal_function.arg_info;
      rf->ori_fn_flags = zf->internal_function.fn_flags;
      rf->ori_num_args = zf->internal_function.num_args;
  
      zf->internal_function.handler = ZEND_FN(swoole_display_disabled_function);
      zf->internal_function.arg_info = nullptr;
      zf->internal_function.fn_flags &= ~(ZEND_ACC_VARIADIC | ZEND_ACC_HAS_TYPE_HINTS | ZEND_ACC_HAS_RETURN_TYPE);
      zf->internal_function.num_args = 0;
  
      zend_hash_add_ptr(tmp_function_table, zf->common.function_name, rf);
      return true;
  }
  
  static bool enable_func(const char *name, size_t l_name) {
      real_func *rf = (real_func*) zend_hash_str_find_ptr(tmp_function_table, name, l_name);
      if (!rf) {
          return false;
      }
  
      rf->function->internal_function.handler = rf->ori_handler;
      rf->function->internal_function.arg_info = rf->ori_arg_info;
      rf->function->internal_function.fn_flags = rf->ori_fn_flags;
      rf->function->internal_function.num_args = rf->ori_num_args;
  
      return true;
  }
  
  void PHPCoroutine::disable_unsafe_function() {
      for (auto &f : unsafe_functions) {
          disable_func(f.c_str(), f.length());
      }
  }
  
  void PHPCoroutine::enable_unsafe_function() {
      for (auto &f : unsafe_functions) {
          enable_func(f.c_str(), f.length());
      }
  }
  
  bool PHPCoroutine::enable_hook(uint32_t flags) {
      if (!runtime_hook_init) {
          HashTable *xport_hash = php_stream_xport_get_hash();
          // php_stream
          ori_factory.tcp = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("tcp"));
          ori_factory.udp = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("udp"));
          ori_factory._unix = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("unix"));
          ori_factory.udg = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("udg"));
          ori_factory.ssl = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("ssl"));
          ori_factory.tls = (php_stream_transport_factory) zend_hash_str_find_ptr(xport_hash, ZEND_STRL("tls"));
  
          // file
          memcpy((void *) &ori_php_plain_files_wrapper, &php_plain_files_wrapper, sizeof(php_plain_files_wrapper));
          memcpy((void *) &ori_php_stream_stdio_ops, &php_stream_stdio_ops, sizeof(php_stream_stdio_ops));
  
          runtime_hook_init = true;
      }
      // php_stream
      if (flags & PHPCoroutine::HOOK_TCP) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_TCP)) {
              if (php_stream_xport_register("tcp", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_TCP;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_TCP) {
              php_stream_xport_register("tcp", ori_factory.tcp);
          }
      }
      if (flags & PHPCoroutine::HOOK_UDP) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_UDP)) {
              if (php_stream_xport_register("udp", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_UDP;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_UDP) {
              php_stream_xport_register("udp", ori_factory.udp);
          }
      }
      if (flags & PHPCoroutine::HOOK_UNIX) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_UNIX)) {
              if (php_stream_xport_register("unix", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_UNIX;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_UNIX) {
              php_stream_xport_register("unix", ori_factory._unix);
          }
      }
      if (flags & PHPCoroutine::HOOK_UDG) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_UDG)) {
              if (php_stream_xport_register("udg", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_UDG;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_UDG) {
              php_stream_xport_register("udg", ori_factory.udg);
          }
      }
      if (flags & PHPCoroutine::HOOK_SSL) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_SSL)) {
              if (php_stream_xport_register("ssl", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_SSL;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_SSL) {
              if (ori_factory.ssl != nullptr) {
                  php_stream_xport_register("ssl", ori_factory.ssl);
              } else {
                  php_stream_xport_unregister("ssl");
              }
          }
      }
      if (flags & PHPCoroutine::HOOK_TLS) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_TLS)) {
              if (php_stream_xport_register("tls", socket_create) != SUCCESS) {
                  flags ^= PHPCoroutine::HOOK_TLS;
              }
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_TLS) {
              if (ori_factory.tls != nullptr) {
                  php_stream_xport_register("tls", ori_factory.tls);
              } else {
                  php_stream_xport_unregister("tls");
              }
          }
      }
      if (flags & PHPCoroutine::HOOK_STREAM_FUNCTION) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_STREAM_FUNCTION)) {
              SW_HOOK_FUNC(stream_select);
              SW_HOOK_FUNC(stream_socket_pair);
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_STREAM_FUNCTION) {
              SW_UNHOOK_FUNC(stream_select);
              SW_UNHOOK_FUNC(stream_socket_pair);
          }
      }
      // file
      if (flags & PHPCoroutine::HOOK_FILE) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_FILE)) {
              memcpy((void *) &php_plain_files_wrapper, &sw_php_plain_files_wrapper, sizeof(php_plain_files_wrapper));
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_FILE) {
              memcpy((void *) &php_plain_files_wrapper, &ori_php_plain_files_wrapper, sizeof(php_plain_files_wrapper));
          }
      }
      // stdio
      if (flags & PHPCoroutine::HOOK_STDIO) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_STDIO)) {
              memcpy((void *) &php_stream_stdio_ops, &sw_php_stream_stdio_ops, sizeof(php_stream_stdio_ops));
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_STDIO) {
              memcpy((void *) &php_stream_stdio_ops, &ori_php_stream_stdio_ops, sizeof(php_stream_stdio_ops));
          }
      }
      // sleep
      if (flags & PHPCoroutine::HOOK_SLEEP) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_SLEEP)) {
              SW_HOOK_FUNC(sleep);
              SW_HOOK_FUNC(usleep);
              SW_HOOK_FUNC(time_nanosleep);
              SW_HOOK_FUNC(time_sleep_until);
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_SLEEP) {
              SW_UNHOOK_FUNC(sleep);
              SW_UNHOOK_FUNC(usleep);
              SW_UNHOOK_FUNC(time_nanosleep);
              SW_UNHOOK_FUNC(time_sleep_until);
          }
      }
      // proc_open
      if (flags & PHPCoroutine::HOOK_PROC) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_PROC)) {
              SW_HOOK_FUNC(proc_open);
              SW_HOOK_FUNC(proc_close);
              SW_HOOK_FUNC(proc_get_status);
              SW_HOOK_FUNC(proc_terminate);
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_PROC) {
              SW_UNHOOK_FUNC(proc_open);
              SW_UNHOOK_FUNC(proc_close);
              SW_UNHOOK_FUNC(proc_get_status);
              SW_UNHOOK_FUNC(proc_terminate);
          }
      }
      // blocking function
      if (flags & PHPCoroutine::HOOK_BLOCKING_FUNCTION) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_BLOCKING_FUNCTION)) {
              hook_func(ZEND_STRL("gethostbyname"), PHP_FN(swoole_coroutine_gethostbyname));
              hook_func(ZEND_STRL("exec"));
              hook_func(ZEND_STRL("shell_exec"));
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_BLOCKING_FUNCTION) {
              SW_UNHOOK_FUNC(gethostbyname);
              SW_UNHOOK_FUNC(exec);
              SW_UNHOOK_FUNC(shell_exec);
          }
      }
      if (flags & PHPCoroutine::HOOK_SOCKETS) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_SOCKETS)) {
              hook_func(ZEND_STRL("socket_create"));
              hook_func(ZEND_STRL("socket_create_listen"));
              hook_func(ZEND_STRL("socket_create_pair"), PHP_FN(swoole_coroutine_socketpair));
              hook_func(ZEND_STRL("socket_connect"));
              hook_func(ZEND_STRL("socket_write"));
              hook_func(ZEND_STRL("socket_read"));
              hook_func(ZEND_STRL("socket_send"));
              hook_func(ZEND_STRL("socket_recv"));
              hook_func(ZEND_STRL("socket_sendto"));
              hook_func(ZEND_STRL("socket_recvfrom"));
              hook_func(ZEND_STRL("socket_bind"));
              hook_func(ZEND_STRL("socket_listen"));
              hook_func(ZEND_STRL("socket_accept"));
              hook_func(ZEND_STRL("socket_getpeername"));
              hook_func(ZEND_STRL("socket_getsockname"));
              hook_func(ZEND_STRL("socket_getopt"));
              hook_func(ZEND_STRL("socket_get_option"));
              hook_func(ZEND_STRL("socket_setopt"));
              hook_func(ZEND_STRL("socket_set_option"));
              hook_func(ZEND_STRL("socket_set_block"));
              hook_func(ZEND_STRL("socket_set_nonblock"));
              hook_func(ZEND_STRL("socket_shutdown"));
              hook_func(ZEND_STRL("socket_close"));
              hook_func(ZEND_STRL("socket_clear_error"));
              hook_func(ZEND_STRL("socket_last_error"));
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_BLOCKING_FUNCTION) {
              SW_UNHOOK_FUNC(socket_create);
              SW_UNHOOK_FUNC(socket_create_listen);
              SW_UNHOOK_FUNC(socket_create_pair);
              SW_UNHOOK_FUNC(socket_connect);
              SW_UNHOOK_FUNC(socket_write);
              SW_UNHOOK_FUNC(socket_read);
              SW_UNHOOK_FUNC(socket_send);
              SW_UNHOOK_FUNC(socket_recv);
              SW_UNHOOK_FUNC(socket_sendto);
              SW_UNHOOK_FUNC(socket_recvfrom);
              SW_UNHOOK_FUNC(socket_bind);
              SW_UNHOOK_FUNC(socket_listen);
              SW_UNHOOK_FUNC(socket_accept);
              SW_UNHOOK_FUNC(socket_getpeername);
              SW_UNHOOK_FUNC(socket_getsockname);
              SW_UNHOOK_FUNC(socket_getopt);
              SW_UNHOOK_FUNC(socket_get_option);
              SW_UNHOOK_FUNC(socket_setopt);
              SW_UNHOOK_FUNC(socket_set_option);
              SW_UNHOOK_FUNC(socket_set_block);
              SW_UNHOOK_FUNC(socket_set_nonblock);
              SW_UNHOOK_FUNC(socket_shutdown);
              SW_UNHOOK_FUNC(socket_close);
              SW_UNHOOK_FUNC(socket_clear_error);
              SW_UNHOOK_FUNC(socket_last_error);
          }
      }
  
  #ifdef SW_USE_CURL
      if (flags & PHPCoroutine::HOOK_NATIVE_CURL) {
          if (flags & PHPCoroutine::HOOK_CURL) {
              php_swoole_fatal_error(E_WARNING, "cannot enable both hooks HOOK_NATIVE_CURL and HOOK_CURL at same time");
              flags ^= PHPCoroutine::HOOK_CURL;
          }
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_NATIVE_CURL)) {
  #if PHP_VERSION_ID >= 80000
              hook_internal_functions(swoole_native_curl_functions);
  #else
              hook_func(ZEND_STRL("curl_close"), PHP_FN(swoole_native_curl_close));
              hook_func(ZEND_STRL("curl_copy_handle"), PHP_FN(swoole_native_curl_copy_handle));
              hook_func(ZEND_STRL("curl_errno"), PHP_FN(swoole_native_curl_errno));
              hook_func(ZEND_STRL("curl_error"), PHP_FN(swoole_native_curl_error));
              hook_func(ZEND_STRL("curl_exec"), PHP_FN(swoole_native_curl_exec));
              hook_func(ZEND_STRL("curl_getinfo"), PHP_FN(swoole_native_curl_getinfo));
              hook_func(ZEND_STRL("curl_init"), PHP_FN(swoole_native_curl_init));
              hook_func(ZEND_STRL("curl_setopt"), PHP_FN(swoole_native_curl_setopt));
              hook_func(ZEND_STRL("curl_setopt_array"), PHP_FN(swoole_native_curl_setopt_array));
              hook_func(ZEND_STRL("curl_reset"), PHP_FN(swoole_native_curl_reset));
              hook_func(ZEND_STRL("curl_pause"), PHP_FN(swoole_native_curl_pause));
              hook_func(ZEND_STRL("curl_escape"), PHP_FN(swoole_native_curl_escape));
              hook_func(ZEND_STRL("curl_unescape"), PHP_FN(swoole_native_curl_unescape));
              #endif
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_NATIVE_CURL) {
              SW_UNHOOK_FUNC(curl_close);
              SW_UNHOOK_FUNC(curl_copy_handle);
              SW_UNHOOK_FUNC(curl_errno);
              SW_UNHOOK_FUNC(curl_error);
              SW_UNHOOK_FUNC(curl_exec);
              SW_UNHOOK_FUNC(curl_getinfo);
              SW_UNHOOK_FUNC(curl_init);
              SW_UNHOOK_FUNC(curl_setopt);
              SW_UNHOOK_FUNC(curl_setopt_array);
              SW_UNHOOK_FUNC(curl_reset);
              SW_UNHOOK_FUNC(curl_pause);
              SW_UNHOOK_FUNC(curl_escape);
              SW_UNHOOK_FUNC(curl_unescape);
          }
      }
  #endif
  
      if (flags & PHPCoroutine::HOOK_CURL) {
          if (!(runtime_hook_flags & PHPCoroutine::HOOK_CURL)) {
              hook_func(ZEND_STRL("curl_init"));
              hook_func(ZEND_STRL("curl_setopt"));
              hook_func(ZEND_STRL("curl_setopt_array"));
              hook_func(ZEND_STRL("curl_exec"));
              hook_func(ZEND_STRL("curl_getinfo"));
              hook_func(ZEND_STRL("curl_errno"));
              hook_func(ZEND_STRL("curl_error"));
              hook_func(ZEND_STRL("curl_reset"));
              hook_func(ZEND_STRL("curl_close"));
              hook_func(ZEND_STRL("curl_multi_getcontent"));
          }
      } else {
          if (runtime_hook_flags & PHPCoroutine::HOOK_CURL) {
              SW_UNHOOK_FUNC(curl_init);
              SW_UNHOOK_FUNC(curl_setopt);
              SW_UNHOOK_FUNC(curl_setopt_array);
              SW_UNHOOK_FUNC(curl_exec);
              SW_UNHOOK_FUNC(curl_getinfo);
              SW_UNHOOK_FUNC(curl_errno);
              SW_UNHOOK_FUNC(curl_error);
              SW_UNHOOK_FUNC(curl_reset);
              SW_UNHOOK_FUNC(curl_close);
              SW_UNHOOK_FUNC(curl_multi_getcontent);
          }
      }
  
      runtime_hook_flags = flags;
      return true;
  }
  
  bool PHPCoroutine::disable_hook() {
      return enable_hook(0);
  }
  
  static PHP_METHOD(swoole_runtime, enableCoroutine) {
      if (!SWOOLE_G(cli)) {
          php_swoole_fatal_error(E_ERROR, "must be used in PHP CLI mode");
          RETURN_FALSE;
      }
      zval *zflags = nullptr;
      zend_long flags = PHPCoroutine::HOOK_ALL;
  
      ZEND_PARSE_PARAMETERS_START(0, 2)
      Z_PARAM_OPTIONAL
      Z_PARAM_ZVAL(zflags)  // or zenable
      Z_PARAM_LONG(flags)
      ZEND_PARSE_PARAMETERS_END_EX(RETURN_FALSE);
  
      if (zflags) {
          if (Z_TYPE_P(zflags) == IS_LONG) {
              flags = SW_MAX(0, Z_LVAL_P(zflags));
          } else if (ZVAL_IS_BOOL(zflags)) {
              if (!Z_BVAL_P(zflags)) {
                  flags = 0;
              }
          } else {
              const char *space, *class_name = get_active_class_name(&space);
              zend_type_error("%s%s%s() expects parameter %d to be %s, %s given",
                              class_name,
                              space,
                              get_active_function_name(),
                              1,
                              "bool or long",
                              zend_zval_type_name(zflags));
          }
      }
  
      PHPCoroutine::set_hook_flags(flags);
      RETURN_BOOL(PHPCoroutine::enable_hook(flags));
  }
  
  static PHP_METHOD(swoole_runtime, getHookFlags) {
      if (runtime_hook_init) {
          RETURN_LONG(runtime_hook_flags);
      } else {
          RETURN_LONG(PHPCoroutine::get_hook_flags());
      }
  }
  
  static PHP_METHOD(swoole_runtime, setHookFlags) {
      if (!SWOOLE_G(cli)) {
          php_swoole_fatal_error(E_ERROR, "must be used in PHP CLI mode");
          RETURN_FALSE;
      }
      zend_long flags = PHPCoroutine::HOOK_ALL;
  
      ZEND_PARSE_PARAMETERS_START(1, 1)
      Z_PARAM_LONG(flags)
      ZEND_PARSE_PARAMETERS_END_EX(RETURN_FALSE);
  
      PHPCoroutine::set_hook_flags(flags);
      RETURN_BOOL(PHPCoroutine::enable_hook(flags));
  }
  
  static PHP_FUNCTION(swoole_sleep) {
      zend_long num;
      if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &num) == FAILURE) {
          RETURN_FALSE;
      }
      if (num < 0) {
          php_error_docref(nullptr, E_WARNING, "Number of seconds must be greater than or equal to 0");
          RETURN_FALSE;
      }
  
      if (Coroutine::get_current()) {
          RETURN_LONG(System::sleep((double) num) < 0 ? num : 0);
      } else {
          RETURN_LONG(php_sleep(num));
      }
  }
  
  static PHP_FUNCTION(swoole_usleep) {
      zend_long num;
      if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &num) == FAILURE) {
          RETURN_FALSE;
      }
      if (num < 0) {
          php_error_docref(nullptr, E_WARNING, "Number of seconds must be greater than or equal to 0");
          RETURN_FALSE;
      }
      double sec = (double) num / 1000000;
      if (Coroutine::get_current()) {
          System::sleep(sec);
      } else {
          usleep((unsigned int) num);
      }
  }
  
  static PHP_FUNCTION(swoole_time_nanosleep) {
      zend_long tv_sec, tv_nsec;
      if (zend_parse_parameters(ZEND_NUM_ARGS(), "ll", &tv_sec, &tv_nsec) == FAILURE) {
          RETURN_FALSE;
      }
  
      if (tv_sec < 0) {
          php_error_docref(nullptr, E_WARNING, "The seconds value must be greater than 0");
          RETURN_FALSE;
      }
      if (tv_nsec < 0) {
          php_error_docref(nullptr, E_WARNING, "The nanoseconds value must be greater than 0");
          RETURN_FALSE;
      }
      double _time = (double) tv_sec + (double) tv_nsec / 1000000000.00;
      if (Coroutine::get_current()) {
          System::sleep(_time);
      } else {
          struct timespec php_req, php_rem;
          php_req.tv_sec = (time_t) tv_sec;
          php_req.tv_nsec = (long) tv_nsec;
  
          if (nanosleep(&php_req, &php_rem) == 0) {
              RETURN_TRUE;
          } else if (errno == EINTR) {
              array_init(return_value);
              add_assoc_long_ex(return_value, "seconds", sizeof("seconds") - 1, php_rem.tv_sec);
              add_assoc_long_ex(return_value, "nanoseconds", sizeof("nanoseconds") - 1, php_rem.tv_nsec);
          } else if (errno == EINVAL) {
              php_swoole_error(E_WARNING, "nanoseconds was not in the range 0 to 999 999 999 or seconds was negative");
          }
      }
      RETURN_TRUE;
  }
  
  static PHP_FUNCTION(swoole_time_sleep_until) {
      double d_ts, c_ts;
      struct timeval tm;
      struct timespec php_req, php_rem;
  
      if (zend_parse_parameters(ZEND_NUM_ARGS(), "d", &d_ts) == FAILURE) {
          RETURN_FALSE;
      }
  
      if (gettimeofday((struct timeval *) &tm, nullptr) != 0) {
          RETURN_FALSE;
      }
  
      c_ts = (double) (d_ts - tm.tv_sec - tm.tv_usec / 1000000.00);
      if (c_ts < 0) {
          php_error_docref(nullptr, E_WARNING, "Sleep until to time is less than current time");
          RETURN_FALSE;
      }
  
      php_req.tv_sec = (time_t) c_ts;
      if (php_req.tv_sec > c_ts) {
          php_req.tv_sec--;
      }
      php_req.tv_nsec = (long) ((c_ts - php_req.tv_sec) * 1000000000.00);
  
      double _time = (double) php_req.tv_sec + (double) php_req.tv_nsec / 1000000000.00;
      if (Coroutine::get_current()) {
          System::sleep(_time);
      } else {
          while (nanosleep(&php_req, &php_rem)) {
              if (errno == EINTR) {
                  php_req.tv_sec = php_rem.tv_sec;
                  php_req.tv_nsec = php_rem.tv_nsec;
              } else {
                  RETURN_FALSE;
              }
          }
      }
      RETURN_TRUE;
  }
  
  static void stream_array_to_fd_set(zval *stream_array, std::unordered_map<int, PollSocket> &fds, int event) {
      zval *elem;
      zend_ulong index;
      zend_string *key;
      php_socket_t sock;
  
      if (!ZVAL_IS_ARRAY(stream_array)) {
          return;
      }
  
      ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(stream_array), index, key, elem) {
          ZVAL_DEREF(elem);
          sock = php_swoole_convert_to_fd(elem);
          if (sock < 0) {
              continue;
          }
          auto i = fds.find(sock);
          if (i == fds.end()) {
              fds.emplace(std::make_pair(sock, PollSocket(event, new zend::KeyValue(index, key, elem))));
          } else {
              i->second.events |= event;
          }
      }
      ZEND_HASH_FOREACH_END();
  }
  
  static int stream_array_emulate_read_fd_set(zval *stream_array) {
      zval *elem, *dest_elem, new_array;
      HashTable *ht;
      php_stream *stream;
      int ret = 0;
      zend_ulong num_ind;
      zend_string *key;
  
      if (!ZVAL_IS_ARRAY(stream_array)) {
          return 0;
      }
  
      ZVAL_NEW_ARR(&new_array);
      ht = Z_ARRVAL(new_array);
      zend_hash_init(ht, zend_hash_num_elements(Z_ARRVAL_P(stream_array)), nullptr, ZVAL_PTR_DTOR, 0);
  
      ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL_P(stream_array), num_ind, key, elem) {
          ZVAL_DEREF(elem);
          php_stream_from_zval_no_verify(stream, elem);
          if (stream == nullptr) {
              continue;
          }
          if ((stream->writepos - stream->readpos) > 0) {
              /* allow readable non-descriptor based streams to participate in stream_select.
               * Non-descriptor streams will only "work" if they have previously buffered the
               * data.  Not ideal, but better than nothing.
               * This branch of code also allows blocking streams with buffered data to
               * operate correctly in stream_select.
               * */
              dest_elem = !key ? zend_hash_index_update(ht, num_ind, elem) : zend_hash_update(ht, key, elem);
              zval_add_ref(dest_elem);
              ret++;
              continue;
          }
      }
      ZEND_HASH_FOREACH_END();
  
      if (ret > 0) {
          /* destroy old array and add new one */
          zend_array_destroy(Z_ARR_P(stream_array));
          ZVAL_ARR(stream_array, ht);
      } else {
          zend_array_destroy(ht);
      }
  
      return ret;
  }
  
  static PHP_FUNCTION(swoole_stream_select) {
      Coroutine::get_current_safe();
  
      zval *r_array, *w_array, *e_array;
      zend_long sec, usec = 0;
      zend_bool secnull;
      int retval = 0;
  
      ZEND_PARSE_PARAMETERS_START(4, 5)
      Z_PARAM_ARRAY_EX(r_array, 1, 1)
      Z_PARAM_ARRAY_EX(w_array, 1, 1)
      Z_PARAM_ARRAY_EX(e_array, 1, 1)
      Z_PARAM_LONG_EX(sec, secnull, 1, 0)
      Z_PARAM_OPTIONAL
      Z_PARAM_LONG(usec)
      ZEND_PARSE_PARAMETERS_END_EX(RETURN_FALSE);
  
      std::unordered_map<int, PollSocket> fds;
  
      if (r_array != nullptr) {
          stream_array_to_fd_set(r_array, fds, SW_EVENT_READ);
      }
  
      if (w_array != nullptr) {
          stream_array_to_fd_set(w_array, fds, SW_EVENT_WRITE);
      }
  
      if (e_array != nullptr) {
          stream_array_to_fd_set(e_array, fds, SW_EVENT_ERROR);
      }
  
      if (fds.size() == 0) {
          php_error_docref(nullptr, E_WARNING, "No stream arrays were passed");
          RETURN_FALSE;
      }
  
      double timeout = -1;
      if (!secnull) {
          if (sec < 0) {
              php_error_docref(nullptr, E_WARNING, "The seconds parameter must be greater than 0");
              RETURN_FALSE;
          } else if (usec < 0) {
              php_error_docref(nullptr, E_WARNING, "The microseconds parameter must be greater than 0");
              RETURN_FALSE;
          }
          timeout = (double) sec + ((double) usec / 1000000);
      }
  
      /* slight hack to support buffered data; if there is data sitting in the
       * read buffer of any of the streams in the read array, let's pretend
       * that we selected, but return only the readable sockets */
      if (r_array != nullptr) {
          retval = stream_array_emulate_read_fd_set(r_array);
          if (retval > 0) {
              if (w_array != nullptr) {
                  zend_hash_clean(Z_ARRVAL_P(w_array));
              }
              if (e_array != nullptr) {
                  zend_hash_clean(Z_ARRVAL_P(e_array));
              }
              RETURN_LONG(retval);
          }
      }
  
      if (r_array != nullptr) {
          zend_hash_clean(Z_ARRVAL_P(r_array));
      }
      if (w_array != nullptr) {
          zend_hash_clean(Z_ARRVAL_P(w_array));
      }
      if (e_array != nullptr) {
          zend_hash_clean(Z_ARRVAL_P(e_array));
      }
  
      /**
       * timeout or add failed
       */
      if (!System::socket_poll(fds, timeout)) {
          RETURN_LONG(0);
      }
  
      for (auto &i : fds) {
          zend::KeyValue *kv = (zend::KeyValue *) i.second.ptr;
          int revents = i.second.revents;
          SW_ASSERT((revents & (~(SW_EVENT_READ | SW_EVENT_WRITE | SW_EVENT_ERROR))) == 0);
          if (revents > 0) {
              if ((revents & SW_EVENT_READ) && r_array) {
                  kv->add_to(r_array);
              }
              if ((revents & SW_EVENT_WRITE) && w_array) {
                  kv->add_to(w_array);
              }
              if ((revents & SW_EVENT_ERROR) && e_array) {
                  kv->add_to(e_array);
              }
              retval++;
          }
          delete kv;
      }
  
      RETURN_LONG(retval);
  }
  
  bool hook_internal_functions(const zend_function_entry *fes) {
      zend_unregister_functions(fes, -1, CG(function_table));
      return zend_register_functions(NULL, fes, NULL, MODULE_PERSISTENT) == SUCCESS;
  }
  
  static void hook_func(const char *name, size_t l_name, zif_handler handler, zend_internal_arg_info *arg_info) {
      real_func *rf = (real_func *) zend_hash_str_find_ptr(tmp_function_table, name, l_name);
      bool use_php_func = false;
      /**
       * use php library function
       */
      if (handler == nullptr) {
          handler = PHP_FN(swoole_user_func_handler);
          use_php_func = true;
      }
      if (rf) {
          rf->function->internal_function.handler = handler;
          return;
      }
  
      zend_function *zf = (zend_function *) zend_hash_str_find_ptr(EG(function_table), name, l_name);
      if (zf == nullptr) {
          return;
      }
  
      rf = (real_func *) emalloc(sizeof(real_func));
      sw_memset_zero(rf, sizeof(*rf));
      rf->function = zf;
      rf->ori_handler = zf->internal_function.handler;
      zf->internal_function.handler = handler;
  
      if (use_php_func) {
          char func[128];
          memcpy(func, ZEND_STRL("swoole_"));
          memcpy(func + 7, zf->common.function_name->val, zf->common.function_name->len);
  
          ZVAL_STRINGL(&rf->name, func, zf->common.function_name->len + 7);
  
          char *func_name;
          zend_fcall_info_cache *func_cache = (zend_fcall_info_cache *) emalloc(sizeof(zend_fcall_info_cache));
          if (!sw_zend_is_callable_ex(&rf->name, nullptr, 0, &func_name, nullptr, func_cache, nullptr)) {
              php_swoole_fatal_error(E_ERROR, "function '%s' is not callable", func_name);
              return;
          }
          efree(func_name);
          rf->fci_cache = func_cache;
      }
  
      zend_hash_add_ptr(tmp_function_table, zf->common.function_name, rf);
  }
  
  static void unhook_func(const char *name, size_t l_name) {
      real_func *rf = (real_func *) zend_hash_str_find_ptr(tmp_function_table, name, l_name);
      if (rf == nullptr) {
          return;
      }
      rf->function->internal_function.handler = rf->ori_handler;
  }
  
  php_stream *php_swoole_create_stream_from_socket(php_socket_t _fd, int domain, int type, int protocol STREAMS_DC) {
      Socket *sock = new Socket(_fd, domain, type, protocol);
  
      if (FG(default_socket_timeout) > 0) {
          sock->set_timeout((double) FG(default_socket_timeout));
      }
  
      php_swoole_netstream_data_t *abstract = (php_swoole_netstream_data_t *) ecalloc(1, sizeof(*abstract));
  
      abstract->socket = sock;
      abstract->stream.timeout.tv_sec = FG(default_socket_timeout);
      abstract->stream.socket = sock->get_fd();
      abstract->blocking = true;
  
      php_stream *stream = php_stream_alloc_rel(&socket_ops, abstract, nullptr, "r+");
  
      if (stream == nullptr) {
          delete sock;
      } else {
          stream->flags |= PHP_STREAM_FLAG_AVOID_BLOCKING;
      }
  
      return stream;
  }
  
  php_stream_ops *php_swoole_get_ori_php_stream_stdio_ops() {
      return &ori_php_stream_stdio_ops;
  }
  
  static PHP_FUNCTION(swoole_stream_socket_pair) {
      zend_long domain, type, protocol;
      php_stream *s1, *s2;
      php_socket_t pair[2];
  
      ZEND_PARSE_PARAMETERS_START(3, 3)
      Z_PARAM_LONG(domain)
      Z_PARAM_LONG(type)
      Z_PARAM_LONG(protocol)
      ZEND_PARSE_PARAMETERS_END_EX(RETURN_FALSE);
  
      if (0 != socketpair((int) domain, (int) type, (int) protocol, pair)) {
          php_swoole_error(E_WARNING, "failed to create sockets: [%d]: %s", errno, strerror(errno));
          RETURN_FALSE;
      }
  
      array_init(return_value);
  
      php_swoole_check_reactor();
  
      s1 = php_swoole_create_stream_from_socket(pair[0], domain, type, protocol STREAMS_CC);
      s2 = php_swoole_create_stream_from_socket(pair[1], domain, type, protocol STREAMS_CC);
  
      /* set the __exposed flag.
       * php_stream_to_zval() does, add_next_index_resource() does not */
      php_stream_auto_cleanup(s1);
      php_stream_auto_cleanup(s2);
  
      add_next_index_resource(return_value, s1->res);
      add_next_index_resource(return_value, s2->res);
  }
  
  static PHP_FUNCTION(swoole_user_func_handler) {
      zend_fcall_info fci;
      fci.size = sizeof(fci);
      fci.object = nullptr;
      ZVAL_UNDEF(&fci.function_name);
      fci.retval = return_value;
      fci.param_count = ZEND_NUM_ARGS();
      fci.params = ZEND_CALL_ARG(execute_data, 1);
  #if PHP_VERSION_ID >= 80000
      fci.named_params = NULL;
  #else
      fci.no_separation = 1;
  #endif
  
      real_func *rf = (real_func *) zend_hash_find_ptr(tmp_function_table, execute_data->func->common.function_name);
      zend_call_function(&fci, rf->fci_cache);
  }
  