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#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <string.h>
#include <errno.h>
#include "npserver.h"
int NP_Server::open_server( char *server,
int ( *callback )( void *, int, int ),
void *data, int int_data )
{
struct hostent *host;
struct servent *service;
struct sockaddr_in server_addr;
int socket_fd, flags, result;
busy_callback = callback;
busy_callback_data = data;
if (( service = getservbyname( "nntp", "tcp" )) == NULL )
{
snprintf( error_message, sizeof error_message,
"NP_server: open_server(): "
"getservbyname() returned error: %s.", strerror( errno ));
return 1;
}
if ( ( host = gethostbyname( server )) == NULL )
{
snprintf( error_message, sizeof error_message,
"NP_Server: open_server(): "
"gethostbyname() returned error: %s.", strerror( errno ));
return 1;
}
if (( socket_fd = socket( PF_INET, SOCK_STREAM, 0 )) == -1 )
{
snprintf( error_message, sizeof error_message,
"NP_Server: open_server(): socket() returned error: %s.",
strerror( errno ));
return 1;
}
memset( &server_addr, 0, sizeof server_addr );
server_addr.sin_family = AF_INET;
/*
* Both gethostbyname() and getservbyname() return data in network
* byte-order on Intel machines.
*/
memcpy( &server_addr.sin_addr, host->h_addr, host->h_length );
server_addr.sin_port = service->s_port;
/*
* Get the current flags settings for the socket file descriptor,
*/
if (( flags = fcntl( socket_fd, F_GETFL, 0 )) < 0 )
{
close( socket_fd );
snprintf( error_message, sizeof error_message,
"NP_Server: open_server(): fcntl() F_GETFL returned error: %s.",
strerror( errno ));
return 1;
}
/*
* Set the socket non-blocking.
*/
if ( fcntl( socket_fd, F_SETFL, flags | O_NONBLOCK ) < 0 )
{
close( socket_fd );
snprintf( error_message, sizeof error_message,
"NP_Server: open_server(): "
"fcntl() F_SETFL returned error: %s.", strerror( errno ));
return 1;
}
/*
* Non-blocking connect.
*/
if (( result = connect( socket_fd, ( struct sockaddr *)&server_addr,
sizeof server_addr )) < 0 )
if ( errno != EINPROGRESS )
{
close( socket_fd );
snprintf( error_message, sizeof error_message,
"NP_Server: open_server(): connect() returned error: %s.",
strerror( errno ));
return 1;
}
/*
* if result is zero, connection has completed immediately.
*/
fd = socket_fd;
if ( result )
{
/*
* Wait for connect() to complete.
*/
if ( wait_for_activity( 2 ) )
return 1;
}
return 0;
}
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