text: /*
   * Spdylay - SPDY Library
   *
   * Copyright (c) 2012 Tatsuhiro Tsujikawa
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  #ifndef SPDYLAY_SSL_H
  #define SPDYLAY_SSL_H
  
  #include "spdylay_config.h"
  
  #include <stdint.h>
  #include <cstdlib>
  #include <sys/time.h>
  #include <poll.h>
  #include <vector>
  
  #include <openssl/ssl.h>
  #include <openssl/err.h>
  #include <spdylay/spdylay.h>
  
  namespace spdylay {
  
  extern bool ssl_debug;
  
  class Spdylay {
  public:
    Spdylay(int fd, SSL *ssl, uint16_t version,
            const spdylay_session_callbacks *callbacks,
            void *user_data);
    ~Spdylay();
    void clear_io_flags();
    int recv();
    int send();
    ssize_t send_data(const uint8_t *data, size_t len, int flags);
    ssize_t recv_data(uint8_t *data, size_t len, int flags);
    bool want_read();
    bool want_write();
    bool finish();
    int fd() const;
    int submit_request
    (const std::string& scheme,
     const std::string& hostport, const std::string& path,
     const std::vector<std::pair<std::string, std::string> >& headers,
     uint8_t pri,
     const spdylay_data_provider *data_prd,
     int64_t data_length,
     void *stream_user_data,
     bool useProxy,
     const std::string& proxyHost,
     uint16_t proxyPort);
    int submit_settings(int flags, spdylay_settings_entry *iv, size_t niv);
    bool would_block();
    void* user_data();
  private:
    SSL *ssl_;
    spdylay_session *session_;
    void *user_data_;
    int fd_;
    uint16_t version_;
    uint8_t io_flags_;
  };
  
  int connect_to(const std::string& host, uint16_t port);
  
  int nonblock_connect_to(const std::string& host, uint16_t port, int timeout);
  
  int make_listen_socket(const std::string& host, uint16_t port, int family);
  
  int make_non_block(int fd);
  
  int set_tcp_nodelay(int fd);
  
  ssize_t send_callback(spdylay_session *session,
                        const uint8_t *data, size_t len, int flags,
                        void *user_data);
  
  ssize_t recv_callback(spdylay_session *session,
                        uint8_t *data, size_t len, int flags, void *user_data);
  
  void print_nv(char **nv);
  
  void on_ctrl_recv_callback
  (spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
   void *user_data);
  
  void on_invalid_ctrl_recv_callback
  (spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
   uint32_t status_code, void *user_data);
  
  void on_ctrl_recv_parse_error_callback(spdylay_session *session,
                                         spdylay_frame_type type,
                                         const uint8_t *head,
                                         size_t headlen,
                                         const uint8_t *payload,
                                         size_t payloadlen,
                                         int error_code, void *user_data);
  
  void on_unknown_ctrl_recv_callback(spdylay_session *session,
                                     const uint8_t *head,
                                     size_t headlen,
                                     const uint8_t *payload,
                                     size_t payloadlen,
                                     void *user_data);
  
  void on_ctrl_send_callback
  (spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
   void *user_data);
  
  void on_data_recv_callback
  (spdylay_session *session, uint8_t flags, int32_t stream_id, int32_t length,
   void *user_data);
  
  void on_data_send_callback
  (spdylay_session *session, uint8_t flags, int32_t stream_id, int32_t length,
   void *user_data);
  
  void ctl_poll(pollfd *pollfd, Spdylay *sc);
  
  int select_next_proto_cb(SSL* ssl,
                           unsigned char **out, unsigned char *outlen,
                           const unsigned char *in, unsigned int inlen,
                           void *arg);
  
  void setup_ssl_ctx(SSL_CTX *ssl_ctx, void *next_proto_select_cb_arg);
  
  int ssl_handshake(SSL *ssl, int fd);
  
  int ssl_nonblock_handshake(SSL *ssl, int fd, int& timeout);
  
  // Returns difference between |a| and |b| in milliseconds, assuming
  // |a| is more recent than |b|.
  int64_t time_delta(const timeval& a, const timeval& b);
  
  void reset_timer();
  
  void get_timer(timeval *tv);
  
  int get_time(timeval *tv);
  
  void print_timer();
  
  enum {
    WANT_READ = 1,
    WANT_WRITE = 1 << 1
  };
  
  uint8_t get_ssl_io_demand(SSL *ssl, ssize_t r);
  
  // Setting true will print characters with ANSI color escape codes
  // when printing SPDY frames. This function changes a static variable.
  void set_color_output(bool f);
  
  } // namespace spdylay
  
  #endif // SPDYLAY_SSL_H
  