/*
 * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
 */
#ifndef _ECORE_CON_H
#define _ECORE_CON_H

#include <time.h>
#include <libgen.h>
#ifdef _WIN32
# include <ws2tcpip.h>
#else
# include <netdb.h>
#endif
#include <Eina.h>

#ifdef EAPI
# undef EAPI
#endif

#ifdef _MSC_VER
# ifdef BUILDING_DLL
#  define EAPI __declspec(dllexport)
# else
#  define EAPI __declspec(dllimport)
# endif
#else
# ifdef __GNUC__
#  if __GNUC__ >= 4
#   define EAPI __attribute__ ((visibility("default")))
#  else
#   define EAPI
#  endif
# else
#  define EAPI
# endif
#endif

/**
 * @file Ecore_Con.h
 * @brief Sockets functions.
 *
 * The Ecore Connection Library ( @c Ecore_Con ) provides simple mechanisms
 * for communications between programs using reliable sockets.  It saves
 * the programmer from having to worry about file descripters and waiting
 * for incoming connections.
 *
 * There are two main objects in the @c Ecore_Con library: the @c
 * Ecore_Con_Server and the @c Ecore_Con_Client.
 *
 * The @c Ecore_Con_Server represents a server that can be connected to.
 * It is used regardless of whether the program is acting as a server or
 * client itself.
 *
 * To create a listening server call @c ecore_con_server_add(), optionally using
 * an ECORE_CON_USE_* encryption type OR'ed with the type for encryption.
 *
 * To connect to a server, call @c ecore_con_server_connect().  Data can
 * then be sent to the server using the @c ecore_con_server_send().
 *
 * Whenever a client connection is made to an @c Ecore_Con_Server, a
 * @c ECORE_CON_CLIENT_ADD event is emitted.  Any event callbacks that are
 * called receive a @c Ecore_Con_Client object, which represents a
 * connection to that particular client.
 *
 * Functions are described in the following groupings:
 * @li @ref Ecore_Con_Lib_Group
 * @li @ref Ecore_Con_Server_Group
 * @li @ref Ecore_Con_Client_Group
 * @li @ref Ecore_Con_Url_Group
 */

#ifdef __cplusplus
extern "C" {
#endif

typedef struct _Ecore_Con_Server Ecore_Con_Server; /**< A connection handle */
typedef struct _Ecore_Con_Client Ecore_Con_Client; /**< A connection handle */
typedef struct _Ecore_Con_Url Ecore_Con_Url;

/**
 * A callback type for use with @ref ecore_con_lookup.
 */
typedef void (*Ecore_Con_Dns_Cb)(const char *canonname,
                                 const char *ip,
                                 struct sockaddr *addr,
                                 int addrlen,
                                 void *data);

/**
 * Types for an ecore_con client/server object.  A correct way to set this type is
 * with an ECORE_CON_$TYPE, optionally OR'ed with an ECORE_CON_$USE if encryption is desired,
 * and LOAD_CERT if the previously loaded certificate should be used.
 * @example ECORE_CON_REMOTE_TCP | ECORE_CON_USE_TLS | ECORE_CON_LOAD_CERT
 */
typedef enum _Ecore_Con_Type
{
   ECORE_CON_LOCAL_USER = 0, /** Socket in ~/.ecore */
   ECORE_CON_LOCAL_SYSTEM = 1, /** Socket in /tmp */
   ECORE_CON_LOCAL_ABSTRACT = 2, /** Abstract socket */
   ECORE_CON_REMOTE_TCP = 3, /** Remote server using TCP */
   ECORE_CON_REMOTE_MCAST = 4, /** Remote multicast server */
   ECORE_CON_REMOTE_UDP = 5, /** Remote server using UDP */
   ECORE_CON_REMOTE_BROADCAST = 6, /** Remote broadcast using UDP */
   ECORE_CON_REMOTE_NODELAY = 7,

   ECORE_CON_USE_SSL2 = (1 << 4), /** Use SSL2: UNSUPPORTED. **/
   ECORE_CON_USE_SSL3 = (1 << 5), /** Use SSL3 */
   ECORE_CON_USE_TLS = (1 << 6), /** Use TLS */

   ECORE_CON_LOAD_CERT = (1 << 7) /** Attempt to use the previously loaded certificate */
} Ecore_Con_Type;
#define ECORE_CON_USE_SSL ECORE_CON_USE_SSL2
#define ECORE_CON_REMOTE_SYSTEM ECORE_CON_REMOTE_TCP

typedef enum _Ecore_Con_Url_Time
{
   ECORE_CON_URL_TIME_NONE = 0,
   ECORE_CON_URL_TIME_IFMODSINCE,
   ECORE_CON_URL_TIME_IFUNMODSINCE,
   ECORE_CON_URL_TIME_LASTMOD
} Ecore_Con_Url_Time;

typedef struct _Ecore_Con_Event_Client_Add Ecore_Con_Event_Client_Add;
typedef struct _Ecore_Con_Event_Client_Del Ecore_Con_Event_Client_Del;
typedef struct _Ecore_Con_Event_Server_Add Ecore_Con_Event_Server_Add;
typedef struct _Ecore_Con_Event_Server_Del Ecore_Con_Event_Server_Del;
typedef struct _Ecore_Con_Event_Client_Data Ecore_Con_Event_Client_Data;
typedef struct _Ecore_Con_Event_Server_Data Ecore_Con_Event_Server_Data;
typedef struct _Ecore_Con_Event_Url_Data Ecore_Con_Event_Url_Data;
typedef struct _Ecore_Con_Event_Url_Complete Ecore_Con_Event_Url_Complete;
typedef struct _Ecore_Con_Event_Url_Progress Ecore_Con_Event_Url_Progress;

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Client_Add
{
   Ecore_Con_Client *client;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Client_Del
{
   Ecore_Con_Client *client;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Server_Add
{
   Ecore_Con_Server *server;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Server_Del
{
   Ecore_Con_Server *server;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Client_Data
{
   Ecore_Con_Client *client;
   void *data;
   int size;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Server_Data
{
   Ecore_Con_Server *server;
   void *data;
   int size;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Url_Data
{
   Ecore_Con_Url *url_con;
   int size;
   unsigned char data[1];
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Url_Complete
{
   Ecore_Con_Url *url_con;
   int status;
};

/// Used as the @p data param for the corresponding event
struct _Ecore_Con_Event_Url_Progress
{
   Ecore_Con_Url *url_con;
   struct
   {
      double total;
      double now;
   } down;
   struct
   {
      double total;
      double now;
   } up;
};

EAPI extern int ECORE_CON_EVENT_CLIENT_ADD; /** A client has connected to the server */
EAPI extern int ECORE_CON_EVENT_CLIENT_DEL; /** A client has disconnected from the server */
EAPI extern int ECORE_CON_EVENT_SERVER_ADD; /** A server was created */
EAPI extern int ECORE_CON_EVENT_SERVER_DEL; /** A server connection was lost */
EAPI extern int ECORE_CON_EVENT_CLIENT_DATA; /** A client connected to the server has sent data */
EAPI extern int ECORE_CON_EVENT_SERVER_DATA; /** A server connection object has data */
EAPI extern int ECORE_CON_EVENT_URL_DATA; /** A URL object has data */
EAPI extern int ECORE_CON_EVENT_URL_COMPLETE; /** A URL object has completed its transfer to and from the server and can be reused */
EAPI extern int ECORE_CON_EVENT_URL_PROGRESS; /** A URL object has made progress in its transfer */

EAPI int               ecore_con_init(void);
EAPI int               ecore_con_shutdown(void);
EAPI Eina_Bool         ecore_con_server_ssl_cert_add(const char *cert);
EAPI Eina_Bool         ecore_con_client_ssl_cert_add(const char *cert_file,
                                                     const char *crl_file,
                                                     const char *key_file);

EAPI Ecore_Con_Server *ecore_con_server_add(Ecore_Con_Type type,
                                            const char *name, int port,
                                            const void *data);

EAPI Ecore_Con_Server *ecore_con_server_connect(Ecore_Con_Type type,
                                                const char *name, int port,
                                                const void *data);
EAPI void *            ecore_con_server_del(Ecore_Con_Server *svr);
EAPI void *            ecore_con_server_data_get(Ecore_Con_Server *svr);
EAPI int               ecore_con_server_connected_get(Ecore_Con_Server *svr);
EAPI Eina_List *       ecore_con_server_clients_get(Ecore_Con_Server *svr);
EAPI int               ecore_con_server_send(Ecore_Con_Server *svr,
                                             const void *data,
                                             int size);
EAPI void              ecore_con_server_client_limit_set(
   Ecore_Con_Server *svr,
   int client_limit,
   char
   reject_excess_clients);
EAPI char *            ecore_con_server_ip_get(Ecore_Con_Server *svr);
EAPI void              ecore_con_server_flush(Ecore_Con_Server *svr);

EAPI int               ecore_con_client_send(Ecore_Con_Client *cl,
                                             const void *data,
                                             int size);
EAPI Ecore_Con_Server *ecore_con_client_server_get(Ecore_Con_Client *cl);
EAPI void *            ecore_con_client_del(Ecore_Con_Client *cl);
EAPI void              ecore_con_client_data_set(Ecore_Con_Client *cl,
                                                 const void *data);
EAPI void *            ecore_con_client_data_get(Ecore_Con_Client *cl);
EAPI char *            ecore_con_client_ip_get(Ecore_Con_Client *cl);
EAPI void              ecore_con_client_flush(Ecore_Con_Client *cl);

EAPI int               ecore_con_ssl_available_get(void);

EAPI int               ecore_con_url_init(void);
EAPI int               ecore_con_url_shutdown(void);
EAPI Ecore_Con_Url *   ecore_con_url_new(const char *url);
EAPI Ecore_Con_Url *   ecore_con_url_custom_new(const char *url,
                                                const char *custom_request);
EAPI void              ecore_con_url_destroy(Ecore_Con_Url *url_con);
EAPI void              ecore_con_url_data_set(Ecore_Con_Url *url_con,
                                              void *data);
EAPI void *            ecore_con_url_data_get(Ecore_Con_Url *url_con);
EAPI void              ecore_con_url_additional_header_add(
   Ecore_Con_Url *url_con,
   const char *key,
   const char *value);
EAPI void              ecore_con_url_additional_headers_clear(
   Ecore_Con_Url *url_con);
EAPI const Eina_List * ecore_con_url_response_headers_get(
   Ecore_Con_Url *url_con);
EAPI int               ecore_con_url_url_set(Ecore_Con_Url *url_con,
                                             const char *url);
EAPI void              ecore_con_url_fd_set(Ecore_Con_Url *url_con, int fd);
EAPI int               ecore_con_url_received_bytes_get(Ecore_Con_Url *url_con);
EAPI int               ecore_con_url_httpauth_set(Ecore_Con_Url *url_con,
                                                  const char *username,
                                                  const char *password,
                                                  Eina_Bool safe);
EAPI int               ecore_con_url_send(Ecore_Con_Url *url_con,
                                          const void *data, size_t length,
                                          const char *content_type);
EAPI void              ecore_con_url_time(Ecore_Con_Url *url_con,
                                          Ecore_Con_Url_Time condition,
                                          time_t tm);

EAPI Eina_Bool         ecore_con_lookup(const char *name,
                                        Ecore_Con_Dns_Cb done_cb,
                                        const void *data);

EAPI int               ecore_con_url_ftp_upload(Ecore_Con_Url *url_con,
                                                const char *filename,
                                                const char *user,
                                                const char *pass,
                                                const char *upload_dir);
EAPI void              ecore_con_url_verbose_set(Ecore_Con_Url *url_con,
                                                 int verbose);
EAPI void              ecore_con_url_ftp_use_epsv_set(Ecore_Con_Url *url_con,
                                                      int use_epsv);
EAPI int               ecore_con_url_http_post_send(Ecore_Con_Url *url_con,
                                                    void *curl_httppost);

#ifdef __cplusplus
}
#endif

#endif