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vlc/include/network.h

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/*****************************************************************************
* network.h: interface to communicate with network plug-ins
*****************************************************************************
* Copyright (C) 2002-2005 the VideoLAN team
* $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
* Rémi Denis-Courmont <rem # videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef __VLC_NETWORK_H
# define __VLC_NETWORK_H
#if defined( WIN32 )
# if defined(UNDER_CE) && defined(sockaddr_storage)
# undef sockaddr_storage
# endif
# if defined(UNDER_CE)
# define HAVE_STRUCT_ADDRINFO
# else
# include <io.h>
# endif
# include <winsock2.h>
# include <ws2tcpip.h>
# define ENETUNREACH WSAENETUNREACH
#else
# if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
# endif
# if HAVE_NETINET_IN_H
# include <netinet/in.h>
# endif
# if HAVE_ARPA_INET_H
# include <arpa/inet.h>
# elif defined( SYS_BEOS )
# include <net/netdb.h>
# endif
# include <netdb.h>
#endif
# ifdef __cplusplus
extern "C" {
# endif
/*****************************************************************************
* network_socket_t: structure passed to a network plug-in to define the
* kind of socket we want
*****************************************************************************/
struct network_socket_t
{
const char *psz_bind_addr;
int i_bind_port;
const char *psz_server_addr;
int i_server_port;
int i_ttl;
int v6only;
/* Return values */
int i_handle;
size_t i_mtu;
};
typedef struct
{
char *psz_protocol;
char *psz_username;
char *psz_password;
char *psz_host;
int i_port;
char *psz_path;
char *psz_option;
char *psz_buffer; /* to be freed */
} vlc_url_t;
/*****************************************************************************
* vlc_UrlParse:
*****************************************************************************
* option : if != 0 then path is split at this char
*
* format [protocol://[login[:password]@]][host[:port]]/path[OPTIONoption]
*****************************************************************************/
static inline void vlc_UrlParse( vlc_url_t *url, const char *psz_url,
char option )
{
char *psz_dup;
char *psz_parse;
char *p;
url->psz_protocol = NULL;
url->psz_username = NULL;
url->psz_password = NULL;
url->psz_host = NULL;
url->i_port = 0;
url->psz_path = NULL;
url->psz_option = NULL;
if( psz_url == NULL )
{
url->psz_buffer = NULL;
return;
}
url->psz_buffer = psz_parse = psz_dup = strdup( psz_url );
p = strstr( psz_parse, ":/" );
if( p != NULL )
{
/* we have a protocol */
/* skip :// */
*p++ = '\0';
if( p[1] == '/' )
p += 2;
url->psz_protocol = psz_parse;
psz_parse = p;
}
p = strchr( psz_parse, '@' );
if( p != NULL )
{
/* We have a login */
url->psz_username = psz_parse;
*p++ = '\0';
psz_parse = strchr( psz_parse, ':' );
if( psz_parse != NULL )
{
/* We have a password */
*psz_parse++ = '\0';
url->psz_password = psz_parse;
}
psz_parse = p;
}
p = strchr( psz_parse, '/' );
if( !p || psz_parse < p )
{
char *p2;
/* We have a host[:port] */
url->psz_host = strdup( psz_parse );
if( p )
{
url->psz_host[p - psz_parse] = '\0';
}
if( *url->psz_host == '[' )
{
/* Ipv6 address */
p2 = strchr( url->psz_host, ']' );
if( p2 )
{
p2 = strchr( p2, ':' );
}
}
else
{
p2 = strchr( url->psz_host, ':' );
}
if( p2 )
{
*p2++ = '\0';
url->i_port = atoi( p2 );
}
}
psz_parse = p;
/* Now parse psz_path and psz_option */
if( psz_parse )
{
url->psz_path = psz_parse;
if( option != '\0' )
{
p = strchr( url->psz_path, option );
if( p )
{
*p++ = '\0';
url->psz_option = p;
}
}
}
}
/*****************************************************************************
* vlc_UrlClean:
*****************************************************************************
*
*****************************************************************************/
static inline void vlc_UrlClean( vlc_url_t *url )
{
if( url->psz_buffer ) free( url->psz_buffer );
if( url->psz_host ) free( url->psz_host );
url->psz_protocol = NULL;
url->psz_username = NULL;
url->psz_password = NULL;
url->psz_host = NULL;
url->i_port = 0;
url->psz_path = NULL;
url->psz_option = NULL;
url->psz_buffer = NULL;
}
static inline int isurlsafe( int c )
{
return ( (unsigned char)( c - 'a' ) < 26 )
|| ( (unsigned char)( c - 'A' ) < 26 )
|| ( (unsigned char)( c - '0' ) < 10 )
/* Hmm, we should not encode character that are allowed in URLs
* (even if they are not URL-safe), nor URL-safe characters.
* We still encode some of them because of Microsoft's crap browser.
*/
|| ( strchr( "-_.", c ) != NULL );
}
/*****************************************************************************
* vlc_UrlEncode:
*****************************************************************************
* perform URL encoding
* (you do NOT want to do URL decoding - it is not reversible - do NOT do it)
*****************************************************************************/
static inline char *vlc_UrlEncode( const char *psz_url )
{
char *psz_enc, *out;
const unsigned char *in;
psz_enc = (char *)malloc( 3 * strlen( psz_url ) + 1 );
if( psz_enc == NULL )
return NULL;
out = psz_enc;
for( in = (const unsigned char *)psz_url; *in; in++ )
{
unsigned char c = *in;
if( isurlsafe( c ) )
*out++ = (char)c;
else
{
*out++ = '%';
*out++ = ( ( c >> 4 ) >= 0xA ) ? 'A' + ( c >> 4 ) - 0xA
: '0' + ( c >> 4 );
*out++ = ( ( c & 0xf ) >= 0xA ) ? 'A' + ( c & 0xf ) - 0xA
: '0' + ( c & 0xf );
}
}
*out++ = '\0';
return (char *)realloc( psz_enc, out - psz_enc );
}
/*****************************************************************************
* vlc_UrlIsNotEncoded:
*****************************************************************************
* check if given string is not a valid URL and must hence be encoded
*****************************************************************************/
#include <ctype.h>
static inline int vlc_UrlIsNotEncoded( const char *psz_url )
{
const char *ptr;
for( ptr = psz_url; *ptr; ptr++ )
{
char c = *ptr;
if( c == '%' )
{
if( !isxdigit( ptr[1] ) || !isxdigit( ptr[2] ) )
return 1; /* not encoded */
ptr += 2;
}
else
if( !isurlsafe( c ) )
return 1;
}
return 0; /* looks fine - but maybe it is not encoded */
}
/*****************************************************************************
* vlc_b64_encode:
*****************************************************************************
*
*****************************************************************************/
static inline char *vlc_b64_encode( char *src )
{
static const char b64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
size_t len = strlen( src );
char *ret;
char *dst = (char *)malloc( ( len + 4 ) * 4 / 3 );
if( dst == NULL )
return NULL;
ret = dst;
while( len > 0 )
{
/* pops (up to) 3 bytes of input */
uint32_t v = *src++ << 24;
if( len >= 2 )
{
v |= *src++ << 16;
if( len >= 3 )
v |= *src++ << 8;
}
/* pushes (up to) 4 bytes of output */
while( v )
{
*dst++ = b64[v >> 26];
v = v << 6;
}
switch( len )
{
case 1:
*dst++ = '=';
*dst++ = '=';
len--;
break;
case 2:
*dst++ = '=';
len -= 2;
break;
default:
len -= 3;
}
}
*dst = '\0';
return ret;
}
/* Portable networking layer communication */
#define net_ConnectTCP(a, b, c) __net_ConnectTCP(VLC_OBJECT(a), b, c)
#define net_OpenTCP(a, b, c) __net_ConnectTCP(VLC_OBJECT(a), b, c)
VLC_EXPORT( int, __net_ConnectTCP, ( vlc_object_t *p_this, const char *psz_host, int i_port ) );
#define net_ListenTCP(a, b, c) __net_ListenTCP(VLC_OBJECT(a), b, c)
VLC_EXPORT( int *, __net_ListenTCP, ( vlc_object_t *, const char *, int ) );
#define net_Accept(a, b, c) __net_Accept(VLC_OBJECT(a), b, c)
VLC_EXPORT( int, __net_Accept, ( vlc_object_t *, int *, mtime_t ) );
#define net_ConnectUDP(a, b, c, d ) __net_ConnectUDP(VLC_OBJECT(a), b, c, d)
VLC_EXPORT( int, __net_ConnectUDP, ( vlc_object_t *p_this, const char *psz_host, int i_port, int hlim ) );
#define net_OpenUDP(a, b, c, d, e ) __net_OpenUDP(VLC_OBJECT(a), b, c, d, e)
VLC_EXPORT( int, __net_OpenUDP, ( vlc_object_t *p_this, const char *psz_bind, int i_bind, const char *psz_server, int i_server ) );
VLC_EXPORT( void, net_Close, ( int fd ) );
VLC_EXPORT( void, net_ListenClose, ( int *fd ) );
/* Functions to read from or write to the networking layer */
struct virtual_socket_t
{
void *p_sys;
int (*pf_recv) ( void *, void *, int );
int (*pf_send) ( void *, const void *, int );
};
#define net_Read(a,b,c,d,e,f) __net_Read(VLC_OBJECT(a),b,c,d,e,f)
VLC_EXPORT( int, __net_Read, ( vlc_object_t *p_this, int fd, v_socket_t *, uint8_t *p_data, int i_data, vlc_bool_t b_retry ) );
#define net_ReadNonBlock(a,b,c,d,e,f) __net_ReadNonBlock(VLC_OBJECT(a),b,c,d,e,f)
VLC_EXPORT( int, __net_ReadNonBlock, ( vlc_object_t *p_this, int fd, v_socket_t *, uint8_t *p_data, int i_data, mtime_t i_wait ) );
#define net_Select(a,b,c,d,e,f,g) __net_Select(VLC_OBJECT(a),b,c,d,e,f,g)
VLC_EXPORT( int, __net_Select, ( vlc_object_t *p_this, int *pi_fd, v_socket_t **, int i_fd, uint8_t *p_data, int i_data, mtime_t i_wait ) );
#define net_Write(a,b,c,d,e) __net_Write(VLC_OBJECT(a),b,c,d,e)
VLC_EXPORT( int, __net_Write, ( vlc_object_t *p_this, int fd, v_socket_t *, const uint8_t *p_data, int i_data ) );
#define net_Gets(a,b,c) __net_Gets(VLC_OBJECT(a),b,c)
VLC_EXPORT( char *, __net_Gets, ( vlc_object_t *p_this, int fd, v_socket_t * ) );
VLC_EXPORT( int, net_Printf, ( vlc_object_t *p_this, int fd, v_socket_t *, const char *psz_fmt, ... ) );
#define net_vaPrintf(a,b,c,d,e) __net_vaPrintf(VLC_OBJECT(a),b,c,d,e)
VLC_EXPORT( int, __net_vaPrintf, ( vlc_object_t *p_this, int fd, v_socket_t *, const char *psz_fmt, va_list args ) );
#if !HAVE_INET_PTON
/* only in core, so no need for C++ extern "C" */
int inet_pton(int af, const char *src, void *dst);
#endif
/*****************************************************************************
* net_StopRecv/Send
*****************************************************************************
* Wrappers for shutdown()
*****************************************************************************/
#if defined (SHUT_WR)
/* the standard way */
# define net_StopSend( fd ) (void)shutdown( fd, SHUT_WR )
# define net_StopRecv( fd ) (void)shutdown( fd, SHUT_RD )
#elif defined (SD_SEND)
/* the Microsoft seemingly-purposedly-different-for-the-sake-of-it way */
# define net_StopSend( fd ) (void)shutdown( fd, SD_SEND )
# define net_StopRecv( fd ) (void)shutdown( fd, SD_RECEIVE )
#else
# ifndef SYS_BEOS /* R5 just doesn't have a working shutdown() */
# warning FIXME: implement shutdown on your platform!
# endif
# define net_StopSend( fd ) (void)0
# define net_StopRecv( fd ) (void)0
#endif
/* Portable network names/addresses resolution layer */
/* GAI error codes */
# ifndef EAI_BADFLAGS
# define EAI_BADFLAGS -1
# endif
# ifndef EAI_NONAME
# define EAI_NONAME -2
# endif
# ifndef EAI_AGAIN
# define EAI_AGAIN -3
# endif
# ifndef EAI_FAIL
# define EAI_FAIL -4
# endif
# ifndef EAI_NODATA
# define EAI_NODATA -5
# endif
# ifndef EAI_FAMILY
# define EAI_FAMILY -6
# endif
# ifndef EAI_SOCKTYPE
# define EAI_SOCKTYPE -7
# endif
# ifndef EAI_SERVICE
# define EAI_SERVICE -8
# endif
# ifndef EAI_ADDRFAMILY
# define EAI_ADDRFAMILY -9
# endif
# ifndef EAI_MEMORY
# define EAI_MEMORY -10
# endif
# ifndef EAI_SYSTEM
# define EAI_SYSTEM -11
# endif
# ifndef NI_MAXHOST
# define NI_MAXHOST 1025
# define NI_MAXSERV 32
# endif
# define NI_MAXNUMERICHOST 64
# ifndef NI_NUMERICHOST
# define NI_NUMERICHOST 0x01
# define NI_NUMERICSERV 0x02
# define NI_NOFQDN 0x04
# define NI_NAMEREQD 0x08
# define NI_DGRAM 0x10
# endif
# ifndef HAVE_STRUCT_ADDRINFO
struct addrinfo
{
int ai_flags;
int ai_family;
int ai_socktype;
int ai_protocol;
size_t ai_addrlen;
struct sockaddr *ai_addr;
char *ai_canonname;
struct addrinfo *ai_next;
};
# define AI_PASSIVE 1
# define AI_CANONNAME 2
# define AI_NUMERICHOST 4
# endif /* if !HAVE_STRUCT_ADDRINFO */
VLC_EXPORT( const char *, vlc_gai_strerror, ( int ) );
VLC_EXPORT( int, vlc_getnameinfo, ( const struct sockaddr *, int, char *, int, int *, int ) );
VLC_EXPORT( int, vlc_getaddrinfo, ( vlc_object_t *, const char *, int, const struct addrinfo *, struct addrinfo ** ) );
VLC_EXPORT( void, vlc_freeaddrinfo, ( struct addrinfo * ) );
/*****************************************************************************
* net_AddressIsMulticast: This function returns VLC_FALSE if the psz_addr does
* not specify a multicast address or if the address is not a valid address.
*****************************************************************************/
static inline vlc_bool_t net_AddressIsMulticast( vlc_object_t *p_object, const char *psz_addr )
{
struct addrinfo hints, *res;
vlc_bool_t b_multicast = VLC_FALSE;
int i;
memset( &hints, 0, sizeof( hints ) );
hints.ai_socktype = SOCK_DGRAM; /* UDP */
hints.ai_flags = AI_NUMERICHOST;
i = vlc_getaddrinfo( p_object, psz_addr, 0,
&hints, &res );
if( i )
{
msg_Err( p_object, "Invalid node for net_AddressIsMulticast: %s : %s",
psz_addr, vlc_gai_strerror( i ) );
return VLC_FALSE;
}
if( res->ai_family == AF_INET )
{
#if !defined( SYS_BEOS )
struct sockaddr_in *v4 = (struct sockaddr_in *) res->ai_addr;
b_multicast = ( ntohl( v4->sin_addr.s_addr ) >= 0xe0000000 )
&& ( ntohl( v4->sin_addr.s_addr ) <= 0xefffffff );
#endif
}
#if defined( WIN32 ) || defined( HAVE_GETADDRINFO )
else if( res->ai_family == AF_INET6 )
{
struct sockaddr_in6 *v6 = (struct sockaddr_in6 *)res->ai_addr;
b_multicast = IN6_IS_ADDR_MULTICAST( &v6->sin6_addr );
}
#endif
vlc_freeaddrinfo( res );
return b_multicast;
}
static inline int net_GetSockAddress( int fd, char *address, int *port )
{
struct sockaddr_storage addr;
socklen_t addrlen = sizeof( addr );
return getsockname( fd, (struct sockaddr *)&addr, &addrlen )
|| vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
NI_MAXNUMERICHOST, port, NI_NUMERICHOST )
? VLC_EGENERIC : 0;
}
static inline int net_GetPeerAddress( int fd, char *address, int *port )
{
struct sockaddr_storage addr;
socklen_t addrlen = sizeof( addr );
return getpeername( fd, (struct sockaddr *)&addr, &addrlen )
|| vlc_getnameinfo( (struct sockaddr *)&addr, addrlen, address,
NI_MAXNUMERICHOST, port, NI_NUMERICHOST )
? VLC_EGENERIC : 0;
}
# ifdef __cplusplus
}
# endif
#endif