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/usr/include/nanohttp-1.0/nanohttp/nanohttp-socket.h is in libnanohttp-dev 1.1.0-17.2.

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/******************************************************************
 *  $Id: nanohttp-socket.h,v 1.29 2006/05/01 17:56:32 mrcsys Exp $
 *
 * CSOAP Project:  A http client/server library in C
 * Copyright (C) 2003  Ferhat Ayaz
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 * 
 * Email: ayaz@jprogrammer.net
 ******************************************************************/
#ifndef NANO_HTTP_SOCKET_H
#define NANO_HTTP_SOCKET_H

#include <sys/types.h>

#include <time.h>

#ifdef HAVE_SSL
#include <openssl/ssl.h>
#endif

#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#endif

#include <nanohttp/nanohttp-common.h>

#define	HSOCKET_FREE	-1

/*
  Socket definition
*/
typedef struct hsocket_t
{
#ifdef WIN32
  SOCKET sock;
#else
  int sock;
#endif
  struct sockaddr_in addr;
  void *ssl;
  char read_buf[2048];
  int buf_start, buf_used;
}
hsocket_t;                      /* end of socket definition */

#ifdef __cplusplus
extern "C"
{
#endif

/**
  Initializes the socket modul. This should be called only 
  once for an application.

  @returns This function should always return H_OK. 
 */
  herror_t hsocket_module_init(int argc, char **argv);


/**
  Destroys the socket modul. This should be called after 
  finishing an application.
*/
  void hsocket_module_destroy(void);


/**
  Initializes a given socket object. This function (or 
  hsokcet_init_ssl) should
  be called for every socket before using it.

  @param sock the destination socket to initialize.

  @see hsocket_init_ssl
  @returns This function should always return H_OK. 
 */
  herror_t hsocket_init(hsocket_t * sock);

/**
  Destroys and releases a given socket.

  @param sock the socket to destroy
*/
  void hsocket_free(hsocket_t * sock);


/**
  Connects to a given host. The hostname can be an IP number 
  or a humen readable hostname.
  
  @param sock the destonation socket object to use
  @param host hostname 
  @param port port number to connect to
  @param ssl  whether to open a SSL connection

  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_CREATE 
    <BR>HSOCKET_ERROR_GET_HOSTNAME 
    <BR>HSOCKET_ERROR_CONNECT
 */
  herror_t hsocket_open(hsocket_t * sock, const char *host, int port,
                        int ssl);


/**
  Close a socket connection.

  @param sock the socket to close
*/
  void hsocket_close(hsocket_t * sock);


/**
  Binds a socket to a given port number. After bind you
  can call hsocket_listen() to listen to the port.

  @param sock socket to use.
  @param port  port number to bind to
  
  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_CREATE
    <BR>HSOCKET_ERROR_BIND

  @see hsocket_listen
 */
  herror_t hsocket_bind(hsocket_t * sock, int port);


/**
  Set the socket to the listen mode. You must bind 
  the socket to a port with hsocket_bind() before 
  you can listen to the port.

  @param sock the socket to use

  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_NOT_INITIALIZED
    <BR>HSOCKET_ERROR_LISTEN
*/
  herror_t hsocket_listen(hsocket_t * sock);


/**
  Accepts an incoming socket request. Note that this function
  will not return until a socket connection is ready.

  @param sock the socket which listents to a port
  @param dest the destination socket which will be created
  
  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_NOT_INITIALIZED
    <BR>HSOCKET_ERROR_ACCEPT
*/
  herror_t hsocket_accept(hsocket_t * sock, hsocket_t * dest);


/**
  Sends data throught the socket.

  @param sock the socket to use to send the data
  @param bytes bytes to send
  @param size size of memory to sent pointed by bytes.

  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_NOT_INITIALIZED
    <BR>HSOCKET_ERROR_SEND
*/
  herror_t hsocket_nsend(hsocket_t * sock, const byte_t * bytes, int size);


/**
  Sends a string throught the socket

  @param sock the socket to use to send the data
  @param str the null terminated string to sent

  @returns H_OK if success. One of the followings if fails:<P>
    <BR>HSOCKET_ERROR_NOT_INITIALIZED
    <BR>HSOCKET_ERROR_SEND
*/
  herror_t hsocket_send(hsocket_t * sock, const char *str);


  int hsocket_select_read(int sock, char *buf, size_t len);
/**
  Reads data from the socket.

  @param sock the socket to read data from
  @param buffer the buffer to use to save the readed bytes
  @param size the maximum size of bytes to read
  @param force if force is 1 then hsocket_read() will wait until
   maximum size of bytes (size parameter) was readed. Otherwise
   this function will not wait and will return with the bytes
   quequed on the socket.

   @returns This function will return -1 if an read error was occured.
     Otherwise the return value is the size of bytes readed from 
     the socket.
  
*/
  herror_t hsocket_read(hsocket_t * sock, byte_t * buffer, int size,
                        int force, int *readed);

#ifdef __cplusplus
}
#endif

#endif