1 /*****************************************************************************
2 * netutils.c: various network functions
3 *****************************************************************************
4 * Copyright (C) 1999, 2000, 2001 VideoLAN
5 * $Id: netutils.c,v 1.24 2001/04/12 01:52:45 sam Exp $
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Benoit Steiner <benny@via.ecp.fr>
9 * Henri Fallon <henri@videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
31 #include <netdb.h> /* gethostbyname() */
32 #include <stdlib.h> /* free(), realloc(), atoi() */
33 #include <errno.h> /* errno() */
34 #include <string.h> /* bzero(), bcopy() */
35 #include <unistd.h> /* gethostname() */
36 #include <sys/time.h> /* gettimeofday */
38 #include <netinet/in.h> /* BSD: struct in_addr */
39 #include <sys/socket.h> /* BSD: struct sockaddr */
40 #ifdef HAVE_ARPA_INET_H
41 #include <arpa/inet.h> /* inet_ntoa(), inet_aton() */
45 #include <sys/ioctl.h> /* ioctl() */
48 #if defined (HAVE_NET_IF_H)
49 #include <net/if.h> /* interface (arch-dependent) */
52 #ifdef HAVE_SYS_SOCKIO_H
53 #include <sys/sockio.h>
68 /*****************************************************************************
69 * input_channel_t: channel library data
70 *****************************************************************************
71 * Store global channel library data.
72 * The part of the code concerning the channel changing process is unstable
73 * as it depends on the VideoLAN channel server, which isn't frozen for
75 *****************************************************************************/
76 typedef struct input_channel_s
78 int i_channel_id; /* current channel number */
79 mtime_t last_change; /* last change date */
83 /*****************************************************************************
84 * network_BuildLocalAddr : fill a sockaddr_in structure for local binding
85 *****************************************************************************/
86 int network_BuildLocalAddr( struct sockaddr_in * p_socket, int i_port,
87 boolean_t b_broadcast )
89 char psz_hostname[INPUT_MAX_SOURCE_LENGTH];
90 struct hostent * p_hostent;
93 memset( p_socket, 0, sizeof( struct sockaddr_in ) );
94 p_socket->sin_family = AF_INET; /* family */
95 p_socket->sin_port = htons( i_port );
98 /* Try to get our own IP */
99 if( gethostname( psz_hostname, sizeof(psz_hostname) ) )
101 intf_ErrMsg( "BuildLocalAddr : unable to resolve local name : %s",
109 /* Instead of trying to find the broadcast address using non-portable
110 * ioctl, let's bind INADDR_ANY */
111 strncpy(psz_hostname,"0.0.0.0",sizeof(psz_hostname));
114 /* Try to convert address directly from in_addr - this will work if
115 * psz_in_addr is dotted decimal. */
116 #ifdef HAVE_ARPA_INET_H
117 if( !inet_aton( psz_hostname, &p_socket->sin_addr) )
119 if( (p_socket->sin_addr.s_addr = inet_addr( psz_hostname )) == -1 )
122 /* We have a fqdn, try to find its address */
123 if ( (p_hostent = gethostbyname( psz_hostname )) == NULL )
125 intf_ErrMsg( "BuildLocalAddr: unknown host %s", psz_hostname );
129 /* Copy the first address of the host in the socket address */
130 memcpy( &p_socket->sin_addr, p_hostent->h_addr_list[0],
131 p_hostent->h_length );
136 /*****************************************************************************
137 * network_BuildRemoteAddr : fill a sockaddr_in structure for remote host
138 *****************************************************************************/
139 int network_BuildRemoteAddr( struct sockaddr_in * p_socket, char * psz_server )
141 struct hostent * p_hostent;
143 /* Reset structure */
144 memset( p_socket, 0, sizeof( struct sockaddr_in ) );
145 p_socket->sin_family = AF_INET; /* family */
146 p_socket->sin_port = htons( 0 ); /* This is for remote end */
148 /* Try to convert address directly from in_addr - this will work if
149 * psz_in_addr is dotted decimal. */
151 #ifdef HAVE_ARPA_INET_H
152 if( !inet_aton( psz_server, &p_socket->sin_addr) )
154 if( (p_socket->sin_addr.s_addr = inet_addr( psz_server )) == -1 )
157 /* We have a fqdn, try to find its address */
158 if ( (p_hostent = gethostbyname(psz_server)) == NULL )
160 intf_ErrMsg( "BuildRemoteAddr: unknown host %s",
165 /* Copy the first address of the host in the socket address */
166 memcpy( &p_socket->sin_addr, p_hostent->h_addr_list[0],
167 p_hostent->h_length );
172 /*****************************************************************************
173 * network_ChannelCreate: initialize global channel method data
174 *****************************************************************************
175 * Initialize channel input method global data. This function should be called
176 * once before any input thread is created or any call to other
177 * input_Channel*() function is attempted.
178 *****************************************************************************/
179 int network_ChannelCreate( void )
181 /* Even when BSD are supported, BeOS is not likely to be supported, so
182 * I prefer to put it apart */
184 intf_ErrMsg( "error: channel changing is not yet supported under BeOS" );
187 /* FIXME : channels handling only work for linux */
189 /* Allocate structure */
190 p_main->p_channel = malloc( sizeof( input_channel_t ) );
191 if( p_main->p_channel == NULL )
193 intf_ErrMsg("error: %s\n", strerror(ENOMEM));
197 /* Initialize structure */
198 p_main->p_channel->i_channel_id = 0;
199 p_main->p_channel->last_change = 0;
201 intf_Msg("Channels initialized\n");
204 intf_ErrMsg( "error : channel changing only works with linux yest" );
206 #endif /* SYS_LINUX */
207 #endif /* SYS_BEOS */
210 /*****************************************************************************
211 * network_ChannelJoin: join a channel
212 *****************************************************************************
213 * This function will try to join a channel. If the relevant interface is
214 * already on the good channel, nothing will be done. Else, and if possible
215 * (if the interface is not locked), the channel server will be contacted
216 * and a change will be requested. The function will block until the change
217 * is effective. Note that once a channel is no more used, it's interface
218 * should be unlocked using input_ChannelLeave().
219 * Non 0 will be returned in case of error.
220 *****************************************************************************/
221 int network_ChannelJoin( int i_channel_id )
223 intf_ErrMsg("Changing to channel %d",i_channel_id);
225 /* Courtesy of Nitrox. He'll update it soon */
227 /* I still prefer to put BeOS a bit apart */
229 intf_ErrMsg( "Channels are not yet supported uunder BeOS" );
235 struct ifreq interface;
236 struct sockaddr_in sa_server;
237 struct sockaddr_in sa_client;
238 unsigned int version = 12;
240 char mess_length = 80;
241 struct timeval *date_cl;
243 long unsigned int date;
248 /* debug */ intf_ErrMsg("ChannelJoin : %d",i_channel_id);
249 /* If last change is too recent, wait a while */
250 if( mdate() - p_main->p_channel->last_change < INPUT_CHANNEL_CHANGE_DELAY )
252 intf_Msg("Waiting before changing channel...\n");
253 mwait( p_main->p_channel->last_change + INPUT_CHANNEL_CHANGE_DELAY );
255 p_main->p_channel->last_change = mdate();
256 p_main->p_channel->i_channel_id = i_channel_id;
258 intf_Msg("Joining channel %d\n", i_channel_id );
261 * Looking for information about the eth0 interface
263 interface.ifr_addr.sa_family=AF_INET;
264 strcpy(interface.ifr_name,INPUT_IFACE_DEFAULT);
268 * Initialysing the socket
270 socket_cl=socket(AF_INET,SOCK_DGRAM,0);
274 * Getting the server's information
276 bzero(&sa_server,sizeof(struct sockaddr_in));
277 sa_server.sin_family=AF_INET;
278 sa_server.sin_port=htons(INPUT_CHANNEL_PORT_DEFAULT);
279 inet_aton(INPUT_CHANNEL_SERVER_DEFAULT,&(sa_server.sin_addr));
282 * Looking for the interface MAC address
284 ioctl(socket_cl,SIOCGIFHWADDR,&interface);
286 "CHANNELSERVER: macaddr == %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
287 interface.ifr_hwaddr.sa_data[0] & 0xff,
288 interface.ifr_hwaddr.sa_data[1] & 0xff,
289 interface.ifr_hwaddr.sa_data[2] & 0xff,
290 interface.ifr_hwaddr.sa_data[3] & 0xff,
291 interface.ifr_hwaddr.sa_data[4] & 0xff,
292 interface.ifr_hwaddr.sa_data[5] & 0xff);
295 * Getting date of the client
297 date_cl=malloc(sizeof(struct timeval));
300 intf_ErrMsg("CHANNELSERVER: unable to allocate memory\n");
301 /* return VS_R_MEMORY;*/
305 if (gettimeofday(date_cl,0)==-1)
307 date=date_cl->tv_sec;
309 intf_DbgMsg("CHANNELSERVER: date %lu\n",date);
313 * Build of the message
315 sprintf(mess,"%d %u %lu %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x \n",
316 i_channel_id, version, date,
317 interface.ifr_hwaddr.sa_data[0] & 0xff,
318 interface.ifr_hwaddr.sa_data[1] & 0xff,
319 interface.ifr_hwaddr.sa_data[2] & 0xff,
320 interface.ifr_hwaddr.sa_data[3] & 0xff,
321 interface.ifr_hwaddr.sa_data[4] & 0xff,
322 interface.ifr_hwaddr.sa_data[5] & 0xff);
324 intf_DbgMsg("CHANNELSERVER: The message is %s\n",mess);
330 bzero(&sa_client,sizeof(struct sockaddr_in));
331 sa_client.sin_family=AF_INET;
332 sa_client.sin_port=htons(4312);
333 sa_client.sin_addr.s_addr=INADDR_ANY;
334 fromlen=sizeof(struct sockaddr);
335 rc=bind(socket_cl,(struct sockaddr *)(&sa_client),sizeof(struct sockaddr));
338 intf_ErrMsg("CHANNELSERVER: Unable to bind socket:%u\n",rc);
339 /* TODO put CS_R_BIND in types.h*/
340 /* return CS_R_SOCKET;*/
348 sendto(socket_cl,mess,mess_length,0,(struct sockaddr *)(&sa_server),\
349 sizeof(struct sockaddr));
352 * Waiting 5 sec for one answer from the server
357 FD_SET(socket_cl,&rfds);
358 nbanswer=select(socket_cl+1,&rfds,NULL,NULL,&time);
360 intf_DbgMsg("CHANNELSERVER: no answer\n");
361 else if(nbanswer==-1)
362 intf_DbgMsg("CHANNELSERVER: Unable to receive the answer\n");
365 recvfrom(socket_cl,&answer,sizeof(char),0,\
366 (struct sockaddr *)(&sa_client),&fromlen);
367 intf_DbgMsg("CHANNELSERVER: the answer : %hhd\n",answer);
370 "CHANNELSERVER: The server failed to create the thread\n");
373 "CHANNELSERVER: The server tries to change the channel\n");
375 intf_DbgMsg("CHANNELSERVER: Unknown answer !\n");
384 #else /* SYS_LINUX */
385 intf_ErrMsg( "Channel only work under linux yet" );
386 #endif /* SYS_LINUX */
389 #endif /* SYS_BEOS */