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 * );
87 static const luaL_Reg vlclua_net_listen_reg[] = {
88 { "accept", vlclua_net_accept },
92 static int vlclua_net_listen_tcp( lua_State *L )
94 vlc_object_t *p_this = vlclua_get_this( L );
95 const char *psz_host = luaL_checkstring( L, 1 );
96 int i_port = luaL_checkint( L, 2 );
97 int *pi_fd = net_ListenTCP( p_this, psz_host, i_port );
99 return luaL_error( L, "Cannot listen on %s:%d", psz_host, i_port );
101 int **ppi_fd = lua_newuserdata( L, sizeof( int * ) );
104 if( luaL_newmetatable( L, "net_listen" ) )
107 luaL_register( L, NULL, vlclua_net_listen_reg );
108 lua_setfield( L, -2, "__index" );
109 lua_pushcfunction( L, vlclua_net_listen_close );
110 lua_setfield( L, -2, "__gc" );
113 lua_setmetatable( L, -2 );
117 static int vlclua_net_listen_close( lua_State *L )
119 int **ppi_fd = (int**)luaL_checkudata( L, 1, "net_listen" );
120 net_ListenClose( *ppi_fd );
124 static int vlclua_net_accept( lua_State *L )
126 vlc_object_t *p_this = vlclua_get_this( L );
127 int **ppi_fd = (int**)luaL_checkudata( L, 1, "net_listen" );
128 int *pi_fd = *ppi_fd;
129 int i_timeout = luaL_optint( L, 2, -1 ); /* block is default */
131 /* Implement net_Accept with timeout */
134 unsigned int i_count = 1;
135 while( pi_fd[i_count] != -1 )
138 struct pollfd ufd[i_count+1];
140 for( i = 0; i < i_count; i++ )
142 ufd[i].fd = pi_fd[i];
143 ufd[i].events = POLLIN;
146 if( poll( ufd, i_count, i_timeout ) > 0 )
148 for( i = 0; i < i_count; i++ )
150 if( !ufd[i].revents ) continue;
151 i_fd = net_AcceptSingle( p_this, ufd[i].fd );
152 if( i_fd == -1 ) continue;
153 memmove( pi_fd + i, pi_fd + i + 1, i_count - (i + 1) );
154 pi_fd[i_count - 1] = ufd[i].fd;
158 lua_pushinteger( L, i_fd );
162 /*****************************************************************************
164 *****************************************************************************/
165 static int vlclua_net_close( lua_State *L )
167 int i_fd = luaL_checkint( L, 1 );
172 static int vlclua_net_send( lua_State *L )
174 int i_fd = luaL_checkint( L, 1 );
176 const char *psz_buffer = luaL_checklstring( L, 2, &i_len );
177 i_len = luaL_optint( L, 3, i_len );
178 i_len = send( i_fd, psz_buffer, i_len, 0 );
179 lua_pushinteger( L, i_len );
183 static int vlclua_net_recv( lua_State *L )
185 int i_fd = luaL_checkint( L, 1 );
186 size_t i_len = luaL_optint( L, 2, 1 );
187 char psz_buffer[i_len];
188 i_len = recv( i_fd, psz_buffer, i_len, 0 );
189 lua_pushlstring( L, psz_buffer, i_len );
193 /*****************************************************************************
195 *****************************************************************************/
196 static int vlclua_net_select( lua_State *L )
199 size_t i_nfds = luaL_checkint( L, 1 );
200 fd_set *fds_read = (fd_set*)luaL_checkudata( L, 2, "fd_set" );
201 fd_set *fds_write = (fd_set*)luaL_checkudata( L, 3, "fd_set" );
202 double f_timeout = luaL_checknumber( L, 4 );
203 struct timeval timeout;
206 if( i_nfds > FD_SETSIZE )
209 timeout.tv_sec = (int)f_timeout;
210 timeout.tv_usec = (int)(1e6*(f_timeout-(double)((int)f_timeout)));
211 i_ret = select( i_nfds, fds_read, fds_write, 0, &timeout );
212 lua_pushinteger( L, i_ret );
213 lua_pushinteger( L, (double)timeout.tv_sec+((double)timeout.tv_usec)/1e-6 );
217 /*****************************************************************************
219 *****************************************************************************/
220 static int vlclua_fd_clr( lua_State * );
221 static int vlclua_fd_isset( lua_State * );
222 static int vlclua_fd_set( lua_State * );
223 static int vlclua_fd_zero( lua_State * );
225 static const luaL_Reg vlclua_fd_set_reg[] = {
226 { "clr", vlclua_fd_clr },
227 { "isset", vlclua_fd_isset },
228 { "set", vlclua_fd_set },
229 { "zero", vlclua_fd_zero },
233 static int vlclua_fd_set_new( lua_State *L )
235 fd_set *fds = (fd_set*)lua_newuserdata( L, sizeof( fd_set ) );
238 if( luaL_newmetatable( L, "fd_set" ) )
241 luaL_register( L, NULL, vlclua_fd_set_reg );
242 lua_setfield( L, -2, "__index" );
245 lua_setmetatable( L, -2 );
249 static int vlclua_fd_clr( lua_State *L )
251 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
252 int i_fd = luaL_checkint( L, 2 );
257 static int vlclua_fd_isset( lua_State *L )
259 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
260 int i_fd = luaL_checkint( L, 2 );
261 lua_pushboolean( L, FD_ISSET( i_fd, fds ) );
265 static int vlclua_fd_set( lua_State *L )
267 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
268 size_t i_fd = luaL_checkint( L, 2 );
269 /* FIXME: we should really use poll() instead here, but that breaks the
270 * VLC/LUA API. On Windows, overflow protection is built-in FD_SET, not
271 * on POSIX. In both cases, run-time behavior will however be wrong. */
273 if( i_fd < FD_SETSIZE )
279 static int vlclua_fd_zero( lua_State *L )
281 fd_set *fds = (fd_set*)luaL_checkudata( L, 1, "fd_set" );
286 /*****************************************************************************
288 *****************************************************************************/
290 static int vlclua_fd_open( lua_State *L )
295 static int vlclua_fd_write( lua_State *L )
297 int i_fd = luaL_checkint( L, 1 );
300 const char *psz_buffer = luaL_checklstring( L, 2, &i_len );
301 i_len = luaL_optint( L, 3, i_len );
302 i_ret = write( i_fd, psz_buffer, i_len );
303 lua_pushinteger( L, i_ret );
307 static int vlclua_fd_read( lua_State *L )
309 int i_fd = luaL_checkint( L, 1 );
310 size_t i_len = luaL_optint( L, 2, 1 );
311 char psz_buffer[i_len];
312 i_len = read( i_fd, psz_buffer, i_len );
313 lua_pushlstring( L, psz_buffer, i_len );
317 /*****************************************************************************
319 *****************************************************************************/
320 static int vlclua_stat( lua_State *L )
322 #ifdef HAVE_SYS_STAT_H
323 const char *psz_path = luaL_checkstring( L, 1 );
325 if( utf8_stat( psz_path, &s ) )
327 //return luaL_error( L, "Couldn't stat %s.", psz_path );
329 if( S_ISREG( s.st_mode ) )
330 lua_pushstring( L, "file" );
331 else if( S_ISDIR( s.st_mode ) )
332 lua_pushstring( L, "dir" );
334 else if( S_ISCHR( s.st_mode ) )
335 lua_pushstring( L, "character device" );
338 else if( S_ISBLK( s.st_mode ) )
339 lua_pushstring( L, "block device" );
342 else if( S_ISFIFO( s.st_mode ) )
343 lua_pushstring( L, "fifo" );
346 else if( S_ISLNK( s.st_mode ) )
347 lua_pushstring( L, "symbolic link" );
350 else if( S_ISSOCK( s.st_mode ) )
351 lua_pushstring( L, "socket" );
354 lua_pushstring( L, "unknown" );
355 lua_setfield( L, -2, "type" );
356 lua_pushinteger( L, s.st_mode );
357 lua_setfield( L, -2, "mode" );
358 lua_pushinteger( L, s.st_uid );
359 lua_setfield( L, -2, "uid" );
360 lua_pushinteger( L, s.st_gid );
361 lua_setfield( L, -2, "gid" );
362 lua_pushinteger( L, s.st_size );
363 lua_setfield( L, -2, "size" );
364 lua_pushinteger( L, s.st_atime );
365 lua_setfield( L, -2, "access_time" );
366 lua_pushinteger( L, s.st_mtime );
367 lua_setfield( L, -2, "modification_time" );
368 lua_pushinteger( L, s.st_ctime );
369 lua_setfield( L, -2, "creation_time" );
372 # warning "Woops, looks like we don't have stat on your platform"
373 return luaL_error( L, "System is missing <sys/stat.h>" );
377 static int vlclua_opendir( lua_State *L )
379 const char *psz_dir = luaL_checkstring( L, 1 );
383 if( ( p_dir = utf8_opendir( psz_dir ) ) == NULL )
384 return luaL_error( L, "cannot open directory `%s'.", psz_dir );
389 char *psz_filename = utf8_readdir( p_dir );
390 if( !psz_filename ) break;
392 lua_pushstring( L, psz_filename );
393 lua_rawseti( L, -2, i );
394 free( psz_filename );
400 /*****************************************************************************
402 *****************************************************************************/
403 static const luaL_Reg vlclua_net_reg[] = {
404 { "url_parse", vlclua_url_parse },
405 { "listen_tcp", vlclua_net_listen_tcp },
406 { "close", vlclua_net_close },
407 { "send", vlclua_net_send },
408 { "recv", vlclua_net_recv },
409 { "select", vlclua_net_select },
410 { "fd_set_new", vlclua_fd_set_new },
411 { "read", vlclua_fd_read },
412 { "write", vlclua_fd_write },
413 { "stat", vlclua_stat }, /* Not really "net" */
414 { "opendir", vlclua_opendir }, /* Not really "net" */
418 void luaopen_net( lua_State *L )
421 luaL_register( L, NULL, vlclua_net_reg );
422 lua_setfield( L, -2, "net" );