modules/access/tcp.c

   1 /*****************************************************************************
   2  * tcp.c: TCP input module
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_access.h>
  35
  36 #include <vlc_network.h>
  37
  38 /*****************************************************************************
  39  * Module descriptor
  40  *****************************************************************************/
  41 static int  Open ( vlc_object_t * );
  42 static void Close( vlc_object_t * );
  43
  44 vlc_module_begin ()
  45     set_shortname( N_("TCP") )
  46     set_description( N_("TCP input") )
  47     set_category( CAT_INPUT )
  48     set_subcategory( SUBCAT_INPUT_ACCESS )
  49
  50     set_capability( "access", 0 )
  51     add_shortcut( "tcp" )
  52     set_callbacks( Open, Close )
  53 vlc_module_end ()
  54
  55 /*****************************************************************************
  56  * Local prototypes
  57  *****************************************************************************/
  58 struct access_sys_t
  59 {
  60     int        fd;
  61 };
  62
  63
  64 static ssize_t Read( access_t *, uint8_t *, size_t );
  65 static int Control( access_t *, int, va_list );
  66
  67 /*****************************************************************************
  68  * Open: open the socket
  69  *****************************************************************************/
  70 static int Open( vlc_object_t *p_this )
  71 {
  72     access_t     *p_access = (access_t *)p_this;
  73     access_sys_t *p_sys;
  74
  75     char         *psz_dup = strdup(p_access->psz_location);
  76     char         *psz_parser = psz_dup;
  77
  78     /* Parse server:port */
  79     if( *psz_parser == '[' )
  80     {
  81         psz_parser = strchr( psz_parser, ']' );
  82         if( psz_parser == NULL )
  83             psz_parser = psz_dup;
  84     }
  85     psz_parser = strchr( psz_parser, ':' );
  86
  87     if( psz_parser == NULL )
  88     {
  89         msg_Err( p_access, "missing port number : %s", psz_dup );
  90         free( psz_dup );
  91         return VLC_EGENERIC;
  92     }
  93
  94     *psz_parser++ = '\0';
  95
  96     /* Init p_access */
  97     access_InitFields( p_access );
  98     ACCESS_SET_CALLBACKS( Read, NULL, Control, NULL );
  99     p_sys = p_access->p_sys = calloc( 1, sizeof( access_sys_t ) );
 100     if( !p_sys )
 101     {
 102         free( psz_dup );
 103         return VLC_ENOMEM;
 104     }
 105
 106     p_sys->fd = net_ConnectTCP( p_access, psz_dup, atoi( psz_parser ) );
 107     free( psz_dup );
 108
 109     if( p_sys->fd < 0 )
 110     {
 111         free( p_sys );
 112         return VLC_EGENERIC;
 113     }
 114
 115     return VLC_SUCCESS;
 116 }
 117
 118 /*****************************************************************************
 119  * Close: free unused data structures
 120  *****************************************************************************/
 121 static void Close( vlc_object_t *p_this )
 122 {
 123     access_t     *p_access = (access_t *)p_this;
 124     access_sys_t *p_sys = p_access->p_sys;
 125
 126     net_Close( p_sys->fd );
 127     free( p_sys );
 128 }
 129
 130 /*****************************************************************************
 131  * Read: read on a file descriptor
 132  *****************************************************************************/
 133 static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
 134 {
 135     access_sys_t *p_sys = p_access->p_sys;
 136     int i_read;
 137
 138     if( p_access->info.b_eof )
 139         return 0;
 140
 141     i_read = net_Read( p_access, p_sys->fd, NULL, p_buffer, i_len,
 142                        false );
 143     if( i_read == 0 )
 144         p_access->info.b_eof = true;
 145     else if( i_read > 0 )
 146         p_access->info.i_pos += i_read;
 147
 148     return i_read;
 149 }
 150
 151 /*****************************************************************************
 152  * Control:
 153  *****************************************************************************/
 154 static int Control( access_t *p_access, int i_query, va_list args )
 155 {
 156     bool    *pb_bool;
 157     int64_t *pi_64;
 158
 159     switch( i_query )
 160     {
 161         case ACCESS_CAN_SEEK:
 162         case ACCESS_CAN_FASTSEEK:
 163             pb_bool = (bool*)va_arg( args, bool* );
 164             *pb_bool = false;
 165             break;
 166         case ACCESS_CAN_PAUSE:
 167             pb_bool = (bool*)va_arg( args, bool* );
 168             *pb_bool = true;    /* FIXME */
 169             break;
 170         case ACCESS_CAN_CONTROL_PACE:
 171             pb_bool = (bool*)va_arg( args, bool* );
 172             *pb_bool = true;    /* FIXME */
 173             break;
 174
 175         case ACCESS_GET_PTS_DELAY:
 176             pi_64 = (int64_t*)va_arg( args, int64_t * );
 177             *pi_64 = INT64_C(1000)
 178                    * var_InheritInteger( p_access, "network-caching" );
 179             break;
 180
 181         case ACCESS_SET_PAUSE_STATE:
 182             /* Nothing to do */
 183             break;
 184
 185         default:
 186             return VLC_EGENERIC;
 187     }
 188     return VLC_SUCCESS;
 189 }