1 /*****************************************************************************
2 * net.c: Network related functions
3 *****************************************************************************
4 * Copyright (C) 2007-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea at videolan tod org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
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 General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_network.h>
39 #include <lua.h> /* Low level lua C API */
40 #include <lauxlib.h> /* Higher level C API */
43 #include <poll.h> /* poll structures and defines */
49 /*****************************************************************************
51 *****************************************************************************/
52 static int vlclua_url_parse( lua_State *L )
54 const char *psz_url = luaL_checkstring( L, 1 );
55 const char *psz_option = luaL_optstring( L, 2, NULL );
58 vlc_UrlParse( &url, psz_url, psz_option?*psz_option:0 );
61 lua_pushstring( L, url.psz_protocol );
62 lua_setfield( L, -2, "protocol" );
63 lua_pushstring( L, url.psz_username );
64 lua_setfield( L, -2, "username" );
65 lua_pushstring( L, url.psz_password );
66 lua_setfield( L, -2, "password" );
67 lua_pushstring( L, url.psz_host );
68 lua_setfield( L, -2, "host" );
69 lua_pushinteger( L, url.i_port );
70 lua_setfield( L, -2, "port" );
71 lua_pushstring( L, url.psz_path );
72 lua_setfield( L, -2, "path" );
73 lua_pushstring( L, url.psz_option );
74 lua_setfield( L, -2, "option" );
81 /*****************************************************************************
83 *****************************************************************************/
84 static int vlclua_net_listen_close( lua_State * );
85 static int vlclua_net_accept( lua_State * );
86 static int vlclua_net_fds( lua_State * );
88 static const luaL_Reg vlclua_net_listen_reg[] = {
89 { "accept", vlclua_net_accept },
90 { "fds", vlclua_net_fds },
94 static int vlclua_net_listen_tcp( lua_State *L )
96 vlc_object_t *p_this = vlclua_get_this( L );
97 const char *psz_host = luaL_checkstring( L, 1 );
98 int i_port = luaL_checkint( L, 2 );
99 int *pi_fd = net_ListenTCP( p_this, psz_host, i_port );
101 return luaL_error( L, "Cannot listen on %s:%d", psz_host, i_port );
103 int **ppi_fd = lua_newuserdata( L, sizeof( int * ) );
106 if( luaL_newmetatable( L, "net_listen" ) )
109 luaL_register( L, NULL, vlclua_net_listen_reg );
110 lua_setfield( L, -2, "__index" );
111 lua_pushcfunction( L, vlclua_net_listen_close );
112 lua_setfield( L, -2, "__gc" );
115 lua_setmetatable( L, -2 );
119 static int vlclua_net_listen_close( lua_State *L )
121 int **ppi_fd = (int**)luaL_checkudata( L, 1, "net_listen" );
122 net_ListenClose( *ppi_fd );
126 static int vlclua_net_fds( lua_State *L )
128 vlc_object_t *p_this = vlclua_get_this( L );
129 int **ppi_fd = (int**)luaL_checkudata( L, 1, "net_listen" );
130 int *pi_fd = *ppi_fd;
133 while( pi_fd[i_count] != -1 )
134 lua_pushinteger( L, pi_fd[i_count++] );
139 static int vlclua_net_accept( lua_State *L )
141 vlc_object_t *p_this = vlclua_get_this( L );
142 int **ppi_fd = (int**)luaL_checkudata( L, 1, "net_listen" );
143 int *pi_fd = *ppi_fd;
144 int i_timeout = luaL_optint( L, 2, -1 ); /* block is default */
146 /* Implement net_Accept with timeout */
149 unsigned int i_count = 1;
150 while( pi_fd[i_count] != -1 )
153 struct pollfd ufd[i_count+1];
155 for( i = 0; i < i_count; i++ )
157 ufd[i].fd = pi_fd[i];
158 ufd[i].events = POLLIN;
161 if( poll( ufd, i_count, i_timeout ) > 0 )
163 for( i = 0; i < i_count; i++ )
165 if( !ufd[i].revents ) continue;
166 i_fd = net_AcceptSingle( p_this, ufd[i].fd );
167 if( i_fd == -1 ) continue;
168 memmove( pi_fd + i, pi_fd + i + 1, i_count - (i + 1) );
169 pi_fd[i_count - 1] = ufd[i].fd;
173 lua_pushinteger( L, i_fd );
177 /*****************************************************************************
179 *****************************************************************************/
180 static int vlclua_net_close( lua_State *L )
182 int i_fd = luaL_checkint( L, 1 );
187 static int vlclua_net_send( lua_State *L )
189 int i_fd = luaL_checkint( L, 1 );
191 const char *psz_buffer = luaL_checklstring( L, 2, &i_len );
192 i_len = luaL_optint( L, 3, i_len );
193 i_len = send( i_fd, psz_buffer, i_len, 0 );
194 lua_pushinteger( L, i_len );
198 static int vlclua_net_recv( lua_State *L )
200 int i_fd = luaL_checkint( L, 1 );
201 size_t i_len = luaL_optint( L, 2, 1 );
202 char psz_buffer[i_len];
203 i_len = recv( i_fd, psz_buffer, i_len, 0 );
204 lua_pushlstring( L, psz_buffer, i_len );
208 /*****************************************************************************
210 *****************************************************************************/
211 static int vlclua_net_select( lua_State *L )
214 size_t i_nfds = luaL_checkint( L, 1 );
215 fd_set *fds_read = (fd_set*)luaL_checkudata( L, 2, "fd_set" );
216 fd_set *fds_write = (fd_set*)luaL_checkudata( L, 3, "fd_set" );
217 double f_timeout = luaL_checknumber( L, 4 );
218 struct timeval timeout;
221 if( i_nfds > FD_SETSIZE )
224 if( f_timeout >= 0. )
226 timeout.tv_sec = (int)f_timeout;
227 timeout.tv_usec = (int)(1e6*(f_timeout-(double)((int)f_timeout)));
229 i_ret = select( i_nfds, fds_read, fds_write, 0, f_timeout >= 0. ? &timeout : NULL );
230 lua_pushinteger( L, i_ret );
234 /*****************************************************************************
236 *****************************************************************************/
237 static int vlclua_fd_clr( lua_State * );
238 static int vlclua_fd_isset( lua_State * );
239 static int vlclua_fd_set( lua_State * );
240 static int vlclua_fd_zero( lua_State * );
242 static const luaL_Reg vlclua_fd_set_reg[] = {
243 { "clr", vlclua_fd_clr },
244 { "isset", vlclua_fd_isset },
245 { "set", vlclua_fd_set },
246 { "zero", vlclua_fd_zero },
250 static int vlclua_fd_set_new( lua_State *L )
252 fd_set *fds = (fd_set*)lua_newuserdata( L, sizeof( fd_set ) );
255 if( luaL_newmetatable( L, "fd_set" ) )
258 luaL_register( L, NULL, vlclua_fd_set_reg );
259 lua_setfield( L, -2, "__index" );
262 lua_setmetatable( L, -2 );
266 static int vlclua_fd_clr( lua_State *L )
268 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
269 int i_fd = luaL_checkint( L, 2 );
274 static int vlclua_fd_isset( lua_State *L )
276 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
277 int i_fd = luaL_checkint( L, 2 );
278 lua_pushboolean( L, FD_ISSET( i_fd, fds ) );
282 static int vlclua_fd_set( lua_State *L )
284 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
285 size_t i_fd = luaL_checkint( L, 2 );
286 /* FIXME: we should really use poll() instead here, but that breaks the
287 * VLC/LUA API. On Windows, overflow protection is built-in FD_SET, not
288 * on POSIX. In both cases, run-time behavior will however be wrong. */
290 if( i_fd < FD_SETSIZE )
296 static int vlclua_fd_zero( lua_State *L )
298 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
303 /*****************************************************************************
305 *****************************************************************************/
307 static int vlclua_fd_open( lua_State *L )
312 static int vlclua_fd_write( lua_State *L )
314 int i_fd = luaL_checkint( L, 1 );
317 const char *psz_buffer = luaL_checklstring( L, 2, &i_len );
318 i_len = luaL_optint( L, 3, i_len );
319 i_ret = write( i_fd, psz_buffer, i_len );
320 lua_pushinteger( L, i_ret );
324 static int vlclua_fd_read( lua_State *L )
326 int i_fd = luaL_checkint( L, 1 );
327 size_t i_len = luaL_optint( L, 2, 1 );
328 char psz_buffer[i_len];
329 i_len = read( i_fd, psz_buffer, i_len );
330 lua_pushlstring( L, psz_buffer, i_len );
334 /*****************************************************************************
336 *****************************************************************************/
337 static int vlclua_stat( lua_State *L )
339 #ifdef HAVE_SYS_STAT_H
340 const char *psz_path = luaL_checkstring( L, 1 );
342 if( utf8_stat( psz_path, &s ) )
344 //return luaL_error( L, "Couldn't stat %s.", psz_path );
346 if( S_ISREG( s.st_mode ) )
347 lua_pushstring( L, "file" );
348 else if( S_ISDIR( s.st_mode ) )
349 lua_pushstring( L, "dir" );
351 else if( S_ISCHR( s.st_mode ) )
352 lua_pushstring( L, "character device" );
355 else if( S_ISBLK( s.st_mode ) )
356 lua_pushstring( L, "block device" );
359 else if( S_ISFIFO( s.st_mode ) )
360 lua_pushstring( L, "fifo" );
363 else if( S_ISLNK( s.st_mode ) )
364 lua_pushstring( L, "symbolic link" );
367 else if( S_ISSOCK( s.st_mode ) )
368 lua_pushstring( L, "socket" );
371 lua_pushstring( L, "unknown" );
372 lua_setfield( L, -2, "type" );
373 lua_pushinteger( L, s.st_mode );
374 lua_setfield( L, -2, "mode" );
375 lua_pushinteger( L, s.st_uid );
376 lua_setfield( L, -2, "uid" );
377 lua_pushinteger( L, s.st_gid );
378 lua_setfield( L, -2, "gid" );
379 lua_pushinteger( L, s.st_size );
380 lua_setfield( L, -2, "size" );
381 lua_pushinteger( L, s.st_atime );
382 lua_setfield( L, -2, "access_time" );
383 lua_pushinteger( L, s.st_mtime );
384 lua_setfield( L, -2, "modification_time" );
385 lua_pushinteger( L, s.st_ctime );
386 lua_setfield( L, -2, "creation_time" );
389 # warning "Woops, looks like we don't have stat on your platform"
390 return luaL_error( L, "System is missing <sys/stat.h>" );
394 static int vlclua_opendir( lua_State *L )
396 const char *psz_dir = luaL_checkstring( L, 1 );
400 if( ( p_dir = utf8_opendir( psz_dir ) ) == NULL )
401 return luaL_error( L, "cannot open directory `%s'.", psz_dir );
406 char *psz_filename = utf8_readdir( p_dir );
407 if( !psz_filename ) break;
409 lua_pushstring( L, psz_filename );
410 lua_rawseti( L, -2, i );
411 free( psz_filename );
417 /*****************************************************************************
419 *****************************************************************************/
420 static const luaL_Reg vlclua_net_reg[] = {
421 { "url_parse", vlclua_url_parse },
422 { "listen_tcp", vlclua_net_listen_tcp },
423 { "close", vlclua_net_close },
424 { "send", vlclua_net_send },
425 { "recv", vlclua_net_recv },
426 { "select", vlclua_net_select },
427 { "fd_set_new", vlclua_fd_set_new },
428 { "read", vlclua_fd_read },
429 { "write", vlclua_fd_write },
430 { "stat", vlclua_stat }, /* Not really "net" */
431 { "opendir", vlclua_opendir }, /* Not really "net" */
435 void luaopen_net( lua_State *L )
438 luaL_register( L, NULL, vlclua_net_reg );
439 lua_setfield( L, -2, "net" );