* getaddrinfo.c: getaddrinfo/getnameinfo replacement functions
*****************************************************************************
* Copyright (C) 2005 the VideoLAN team
- * Copyright (C) 2002-2004 Rémi Denis-Courmont
+ * Copyright (C) 2002-2007 Rémi Denis-Courmont
* $Id$
*
* Author: Rémi Denis-Courmont <rem # videolan.org>
#ifndef AF_UNSPEC
# define AF_UNSPEC 0
#endif
-#ifndef EAI_OVERFLOW
-# define EAI_OVERFLOW -12 /* Argument buffer overflow. */
-#endif
-
-#define _NI_MASK (NI_NUMERICHOST|NI_NUMERICSERV|NI_NOFQDN|NI_NAMEREQD|\
- NI_DGRAM)
-#define _AI_MASK (AI_PASSIVE|AI_CANONNAME|AI_NUMERICHOST)
#ifndef HAVE_GAI_STRERROR
{ EAI_SERVICE, "Incompatible service for socket type" },
{ EAI_ADDRFAMILY, "Unavailable address family for host name" },
{ EAI_MEMORY, "Memory allocation failure" },
+ { EAI_OVERFLOW, "Buffer overflow" },
{ EAI_SYSTEM, "System error" },
{ 0, NULL }
};
/****************************************************************************
* Converts an EAI_* error code into human readable english text.
****************************************************************************/
-const char *vlc_gai_strerror( int errnum )
+const char *vlc_gai_strerror (int errnum)
{
- int i;
-
- for (i = 0; __gai_errlist[i].msg != NULL; i++)
+ for (unsigned i = 0; __gai_errlist[i].msg != NULL; i++)
if (errnum == __gai_errlist[i].code)
return __gai_errlist[i].msg;
return __gai_unknownerr;
}
-# undef _EAI_POSITIVE_MAX
#else /* ifndef HAVE_GAI_STRERROR */
-const char *vlc_gai_strerror( int errnum )
+const char *vlc_gai_strerror (int errnum)
{
- return gai_strerror( errnum );
+ return gai_strerror (errnum);
}
#endif
-#if !(defined (HAVE_GETNAMEINFO) && defined (HAVE_GETADDRINFO))
-/*
- * Converts the current herrno error value into an EAI_* error code.
- * That error code is normally returned by getnameinfo() or getaddrinfo().
- */
-static int
-gai_error_from_herrno( void )
-{
- switch(h_errno)
- {
- case HOST_NOT_FOUND:
- return EAI_NONAME;
-
- case NO_ADDRESS:
-# if (NO_ADDRESS != NO_DATA)
- case NO_DATA:
-# endif
- return EAI_NODATA;
-
- case NO_RECOVERY:
- return EAI_FAIL;
-
- case TRY_AGAIN:
- return EAI_AGAIN;
- }
- return EAI_SYSTEM;
-}
-#endif /* if !(HAVE_GETNAMEINFO && HAVE_GETADDRINFO) */
-
#ifndef HAVE_GETNAMEINFO
+#define _NI_MASK (NI_NUMERICHOST|NI_NUMERICSERV|NI_NOFQDN|NI_NAMEREQD|\
+ NI_DGRAM)
/*
* getnameinfo() non-thread-safe IPv4-only implementation,
* Address-family-independant address to hostname translation
* GNU C library 2.0.x is known to lack this function, even though it defines
* getaddrinfo().
*/
+#ifdef WIN32
+static int WSAAPI
+getnameinfo (const struct sockaddr *sa, socklen_t salen,
+ char *host, DWORD hostlen, char *serv, DWORD servlen, int flags)
+#else
static int
-__getnameinfo( const struct sockaddr *sa, socklen_t salen,
- char *host, int hostlen, char *serv, int servlen, int flags )
+getnameinfo (const struct sockaddr *sa, socklen_t salen,
+ char *host, int hostlen, char *serv, int servlen, int flags)
+#endif
{
- if (((unsigned)salen < sizeof (struct sockaddr_in))
+ if (((size_t)salen < sizeof (struct sockaddr_in))
|| (sa->sa_family != AF_INET))
return EAI_FAMILY;
else if (flags & (~_NI_MASK))
if (snprintf (host, hostlen, "%u.%u.%u.%u", ipv4 >> 24,
(ipv4 >> 16) & 0xff, (ipv4 >> 8) & 0xff,
- ipv4 & 0xff) >= hostlen)
+ ipv4 & 0xff) >= (int)hostlen)
return EAI_OVERFLOW;
}
if (serv != NULL)
{
if (snprintf (serv, servlen, "%u",
- (unsigned int)ntohs (addr->sin_port)) >= servlen)
+ (unsigned int)ntohs (addr->sin_port)) >= (int)servlen)
return EAI_OVERFLOW;
}
}
#endif /* if !HAVE_GETNAMEINFO */
-#if defined( WIN32 ) && !defined( UNDER_CE )
- /*
- * Here is the kind of kludge you need to keep binary compatibility among
- * varying OS versions...
- */
-typedef int (CALLBACK * GETNAMEINFO) ( const struct sockaddr*, socklen_t,
- char*, DWORD, char*, DWORD, int );
-typedef int (CALLBACK * GETADDRINFO) (const char *, const char *,
- const struct addrinfo *,
- struct addrinfo **);
-
-typedef void (CALLBACK * FREEADDRINFO) ( struct addrinfo * );
-
-
-static WINAPI int _ws2_getnameinfo_bind( const struct sockaddr *sa, socklen_t salen,
- char *host, DWORD hostlen, char *serv, DWORD servlen, int flags );
-
-static WINAPI int _ws2_getaddrinfo_bind(const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res);
-
-static WINAPI void _ws2_freeaddrinfo_bind( struct addrinfo *infos );
-
-static GETNAMEINFO ws2_getnameinfo = _ws2_getnameinfo_bind;
-static GETADDRINFO ws2_getaddrinfo = _ws2_getaddrinfo_bind;
-static FREEADDRINFO ws2_freeaddrinfo = _ws2_freeaddrinfo_bind;
-
-static int _ws2_find_ipv6_api(void)
+#ifndef HAVE_GETADDRINFO
+#define _AI_MASK (AI_PASSIVE|AI_CANONNAME|AI_NUMERICHOST)
+/*
+ * Converts the current herrno error value into an EAI_* error code.
+ * That error code is normally returned by getnameinfo() or getaddrinfo().
+ */
+static int
+gai_error_from_herrno (void)
{
- /* For Windows XP and above, IPv6 stack is in WS2_32.DLL */
- HINSTANCE module = LoadLibrary( "ws2_32.dll" );
- if( module != NULL )
+ switch (h_errno)
{
- ws2_getnameinfo = (GETNAMEINFO)GetProcAddress( module, "getnameinfo" );
- ws2_getaddrinfo = (GETADDRINFO)GetProcAddress( module, "getaddrinfo" );
- ws2_freeaddrinfo = (FREEADDRINFO)GetProcAddress( module, "freeaddrinfo" );
- if( ws2_getnameinfo && ws2_getaddrinfo && ws2_freeaddrinfo )
- {
- /* got them */
- return 1;
- }
- FreeLibrary( module );
-
- /* For Windows 2000 and below, try IPv6 stack in in WSHIP6.DLL */
- module = LoadLibrary( "wship6.dll" );
- if( module != NULL )
- {
- ws2_getnameinfo = (GETNAMEINFO)GetProcAddress( module, "getnameinfo" );
- ws2_getaddrinfo = (GETADDRINFO)GetProcAddress( module, "getaddrinfo" );
- ws2_freeaddrinfo = (FREEADDRINFO)GetProcAddress( module, "freeaddrinfo" );
- if( ws2_getnameinfo && ws2_getaddrinfo && ws2_freeaddrinfo )
- {
- /* got them */
- return 1;
- }
- FreeLibrary( module );
- }
- }
- /* no API */
- return 0;
-}
+ case HOST_NOT_FOUND:
+ return EAI_NONAME;
-static WINAPI int _ws2_getnameinfo_bind( const struct sockaddr *sa, socklen_t salen,
- char *host, DWORD hostlen, char *serv, DWORD servlen, int flags )
-{
- if( _ws2_find_ipv6_api() )
- {
- return ws2_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
- }
- /* return a possible error if API is not found */
- WSASetLastError(WSAHOST_NOT_FOUND);
- return WSAHOST_NOT_FOUND;
-}
+ case NO_ADDRESS:
+# if (NO_ADDRESS != NO_DATA)
+ case NO_DATA:
+# endif
+ return EAI_NODATA;
-static WINAPI int _ws2_getaddrinfo_bind(const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res)
-{
- if( _ws2_find_ipv6_api() )
- {
- return ws2_getaddrinfo(node, service, hints, res);
- }
- /* return a possible error if API is not found */
- WSASetLastError(WSAHOST_NOT_FOUND);
- return WSAHOST_NOT_FOUND;
-}
+ case NO_RECOVERY:
+ return EAI_FAIL;
-static WINAPI void _ws2_freeaddrinfo_bind( struct addrinfo *infos )
-{
- if( _ws2_find_ipv6_api() )
- {
- ws2_freeaddrinfo(infos);
+ case TRY_AGAIN:
+ return EAI_AGAIN;
}
+ return EAI_SYSTEM;
}
-#endif
-
-#ifndef HAVE_GETADDRINFO
/*
* This functions must be used to free the memory allocated by getaddrinfo().
*/
-static void
-__freeaddrinfo (struct addrinfo *res)
+#ifdef WIN32
+static void WSAAPI freeaddrinfo (struct addrinfo *res)
+#else
+static void freeaddrinfo (struct addrinfo *res)
+#endif
{
if (res != NULL)
{
*
* Only UDP and TCP over IPv4 are supported here.
*/
+#ifdef WIN32
+static int WSAAPI
+getaddrinfo (const char *node, const char *service,
+ const struct addrinfo *hints, struct addrinfo **res)
+#else
static int
-__getaddrinfo (const char *node, const char *service,
- const struct addrinfo *hints, struct addrinfo **res)
+getaddrinfo (const char *node, const char *service,
+ const struct addrinfo *hints, struct addrinfo **res)
+#endif
{
struct addrinfo *info;
u_long ip;
entry = gethostbyname (node);
if (entry == NULL)
- return EAI_NONAME;
+ return gai_error_from_herrno ();
if ((entry->h_length != 4) || (entry->h_addrtype != AF_INET))
return EAI_FAMILY;
port = 0;
else
{
- long d;
+ unsigned long d;
char *end;
d = strtoul (service, &end, 0);
- if (end[0] /* service is not a number */
- || (d > 65535))
- {
- struct servent *entry;
- const char *protoname;
-
- switch (protocol)
- {
- case IPPROTO_TCP:
- protoname = "tcp";
- break;
-
- case IPPROTO_UDP:
- protoname = "udp";
- break;
-
- default:
- protoname = NULL;
- }
-
- entry = getservbyname (service, protoname);
- if (entry == NULL)
- return EAI_SERVICE;
+ if (end[0] || (d > 65535u))
+ return EAI_SERVICE;
- port = entry->s_port;
- }
- else
- port = htons ((u_short)d);
+ port = htons ((u_short)d);
}
/* building results... */
}
#endif /* if !HAVE_GETADDRINFO */
+#if defined( WIN32 ) && !defined( UNDER_CE )
+ /*
+ * Here is the kind of kludge you need to keep binary compatibility among
+ * varying OS versions...
+ */
+typedef int (WSAAPI * GETNAMEINFO) ( const struct sockaddr FAR *, socklen_t,
+ char FAR *, DWORD, char FAR *, DWORD, int );
+typedef int (WSAAPI * GETADDRINFO) (const char FAR *, const char FAR *,
+ const struct addrinfo FAR *,
+ struct addrinfo FAR * FAR *);
+
+typedef void (WSAAPI * FREEADDRINFO) ( struct addrinfo FAR * );
+
+static int WSAAPI _ws2_getnameinfo_bind ( const struct sockaddr FAR *, socklen_t,
+ char FAR *, DWORD, char FAR *, DWORD, int );
+static int WSAAPI _ws2_getaddrinfo_bind (const char FAR *, const char FAR *,
+ const struct addrinfo FAR *,
+ struct addrinfo FAR * FAR *);
+
+static GETNAMEINFO ws2_getnameinfo = _ws2_getnameinfo_bind;
+static GETADDRINFO ws2_getaddrinfo = _ws2_getaddrinfo_bind;
+static FREEADDRINFO ws2_freeaddrinfo;
+
+static FARPROC ws2_find_api (LPCTSTR name)
+{
+ FARPROC f = NULL;
+
+ HMODULE m = GetModuleHandle (TEXT("WS2_32"));
+ if (m != NULL)
+ f = GetProcAddress (m, name);
+
+ if (f == NULL)
+ {
+ /* Windows 2K IPv6 preview */
+ m = LoadLibrary (TEXT("WSHIP6"));
+ if (m != NULL)
+ f = GetProcAddress (m, name);
+ }
+
+ return f;
+}
+
+static WSAAPI int _ws2_getnameinfo_bind( const struct sockaddr FAR * sa, socklen_t salen,
+ char FAR *host, DWORD hostlen, char FAR *serv, DWORD servlen, int flags )
+{
+ GETNAMEINFO entry = (GETNAMEINFO)ws2_find_api (TEXT("getnameinfo"));
+ int result;
+
+ if (entry == NULL)
+ {
+ /* not found, use replacement API instead */
+ entry = getnameinfo;
+
+ }
+ /* call API before replacing function pointer to avoid crash */
+ result = entry (sa, salen, host, hostlen, serv, servlen, flags);
+ ws2_getnameinfo = entry;
+ return result;
+}
+#undef getnameinfo
+#define getnameinfo ws2_getnameinfo
+
+static WSAAPI int _ws2_getaddrinfo_bind(const char FAR *node, const char FAR *service,
+ const struct addrinfo FAR *hints, struct addrinfo FAR * FAR *res)
+{
+ GETADDRINFO entry;
+ FREEADDRINFO freentry;
+ int result;
+
+ entry = (GETADDRINFO)ws2_find_api (TEXT("getaddrinfo"));
+ freentry = (FREEADDRINFO)ws2_find_api (TEXT("freeaddrinfo"));
+
+ if ((entry == NULL) || (freentry == NULL))
+ {
+ /* not found, use replacement API instead */
+ entry = getaddrinfo;
+ freentry = freeaddrinfo;
+ }
+ /* call API before replacing function pointer to avoid crash */
+ result = entry (node, service, hints, res);
+ ws2_freeaddrinfo = freentry;
+ ws2_getaddrinfo = entry;
+ return result;
+}
+#undef getaddrinfo
+#undef freeaddrinfo
+#define getaddrinfo ws2_getaddrinfo
+#define freeaddrinfo ws2_freeaddrinfo
+#define HAVE_GETADDRINFO
+#endif
+
+
int vlc_getnameinfo( const struct sockaddr *sa, int salen,
char *host, int hostlen, int *portnum, int flags )
psz_serv = NULL;
i_servlen = 0;
}
-#if defined( WIN32 ) && !defined( UNDER_CE )
- i_val = ws2_getnameinfo( sa, salen, host, hostlen, psz_serv,
- i_servlen, flags );
-#endif
-#if defined( HAVE_GETNAMEINFO ) || defined( UNDER_CE )
- i_val = getnameinfo(sa, salen, host, hostlen, psz_serv, i_servlen, flags);
-#else
- {
-# ifdef HAVE_USABLE_MUTEX_THAT_DONT_NEED_LIBVLC_POINTER
- static vlc_value_t lock;
- /* my getnameinfo implementation is not thread-safe as it uses
- * gethostbyaddr and the likes */
- vlc_mutex_lock( lock.p_address );
-#else
-# warning FIXME : This is not thread-safe!
-#endif
- i_val = __getnameinfo( sa, salen, host, hostlen, psz_serv, i_servlen,
- flags );
-# ifdef HAVE_USABLE_MUTEX_THAT_DONT_NEED_LIBVLC_POINTER
- vlc_mutex_unlock( lock.p_address );
-# endif
- }
-#endif
+ i_val = getnameinfo(sa, salen, host, hostlen, psz_serv, i_servlen, flags);
if( portnum != NULL )
*portnum = atoi( psz_serv );
}
-/* TODO: support for setting sin6_scope_id */
int vlc_getaddrinfo( vlc_object_t *p_this, const char *node,
int i_port, const struct addrinfo *p_hints,
struct addrinfo **res )
snprintf( psz_service, 6, "%d", i_port );
/* Check if we have to force ipv4 or ipv6 */
- if( p_hints == NULL )
- memset( &hints, 0, sizeof( hints ) );
- else
- memcpy( &hints, p_hints, sizeof( hints ) );
+ memset (&hints, 0, sizeof (hints));
+ if (p_hints != NULL)
+ {
+ const int safe_flags =
+ AI_PASSIVE |
+ AI_CANONNAME |
+ AI_NUMERICHOST |
+#ifdef AI_NUMERICSERV
+ AI_NUMERICSERV |
+#endif
+#ifdef AI_ALL
+ AI_ALL |
+#endif
+#ifdef AI_ADDRCONFIG
+ AI_ADDRCONFIG |
+#endif
+#ifdef AI_V4MAPPED
+ AI_V4MAPPED |
+#endif
+ 0;
+
+ hints.ai_family = p_hints->ai_family;
+ hints.ai_socktype = p_hints->ai_socktype;
+ hints.ai_protocol = p_hints->ai_protocol;
+ /* Unfortunately, some flags chang the layout of struct addrinfo, so
+ * they cannot be copied blindly from p_hints to &hints. Therefore, we
+ * only copy flags that we know for sure are "safe".
+ */
+ hints.ai_flags = p_hints->ai_flags & safe_flags;
+ }
+
+#ifdef AI_NUMERICSERV
+ /* We only ever use port *numbers* */
+ hints.ai_flags |= AI_NUMERICSERV;
+#endif
if( hints.ai_family == AF_UNSPEC )
{
}
}
-#if defined( WIN32 ) && !defined( UNDER_CE )
+#ifdef WIN32
/*
* Winsock tries to resolve numerical IPv4 addresses as AAAA
- * and IPv6 addresses as A... There comes the work around.
+ * and IPv6 addresses as A... There comes the bug-to-bug fix.
*/
if ((hints.ai_flags & AI_NUMERICHOST) == 0)
{
hints.ai_flags |= AI_NUMERICHOST;
- if (ws2_getaddrinfo (psz_node, psz_service, &hints, res) == 0)
+ if (getaddrinfo (psz_node, psz_service, &hints, res) == 0)
return 0;
hints.ai_flags &= ~AI_NUMERICHOST;
}
-
- return ws2_getaddrinfo (psz_node, psz_service, &hints, res);
#endif
-#if defined( HAVE_GETADDRINFO ) || defined( UNDER_CE )
+#if defined (HAVE_GETADDRINFO)
# ifdef AI_IDN
/* Run-time I18n Domain Names support */
- {
- static vlc_bool_t i_idn = VLC_TRUE; /* beware of thread-safety */
-
- if( i_idn )
- {
- int i_ret;
-
- hints.ai_flags |= AI_IDN;
- i_ret = getaddrinfo( psz_node, psz_service, &hints, res );
+ static vlc_bool_t b_idn = VLC_TRUE; /* beware of thread-safety */
- if( i_ret != EAI_BADFLAGS )
- return i_ret;
+ if (b_idn)
+ {
+ hints.ai_flags |= AI_IDN;
+ int ret = getaddrinfo (psz_node, psz_service, &hints, res);
- /* libidn not available: disable and retry without it */
+ if (ret != EAI_BADFLAGS)
+ return ret;
- /* NOTE: Using i_idn here would not be thread-safe */
- hints.ai_flags &= ~AI_IDN;
- i_idn = VLC_FALSE;
- msg_Dbg( p_this, "International Domain Names not supported - " \
- "disabled" );
- }
+ /* IDN not available: disable and retry without it */
+ hints.ai_flags &= ~AI_IDN;
+ b_idn = VLC_FALSE;
+ msg_Info (p_this, "International Domain Names not supported");
}
# endif
- return getaddrinfo( psz_node, psz_service, &hints, res );
+ return getaddrinfo (psz_node, psz_service, &hints, res);
#else
-{
- int i_ret;
-
+ int ret;
vlc_value_t lock;
- var_Create( p_this->p_libvlc, "getaddrinfo_mutex", VLC_VAR_MUTEX );
- var_Get( p_this->p_libvlc, "getaddrinfo_mutex", &lock );
- vlc_mutex_lock( lock.p_address );
+ var_Create (p_this->p_libvlc, "getaddrinfo_mutex", VLC_VAR_MUTEX);
+ var_Get (p_this->p_libvlc, "getaddrinfo_mutex", &lock);
+ vlc_mutex_lock (lock.p_address);
- i_ret = __getaddrinfo( psz_node, psz_service, &hints, res );
- vlc_mutex_unlock( lock.p_address );
- return i_ret;
-}
+ ret = getaddrinfo (psz_node, psz_service, &hints, res);
+ vlc_mutex_unlock (lock.p_address);
+ return ret;
#endif
}
void vlc_freeaddrinfo( struct addrinfo *infos )
{
-#if defined( WIN32 ) && !defined( UNDER_CE )
- ws2_freeaddrinfo( infos );
-#endif
-#if defined( HAVE_GETADDRINFO ) || defined( UNDER_CE )
- freeaddrinfo( infos );
-#else
- __freeaddrinfo( infos );
-#endif
+ freeaddrinfo (infos);
}
projects / vlc / blobdiff