+#ifndef AI_IDN
+# define AI_IDN 0 /* GNU/libc extension */
+#endif
+
+#ifdef __OS2__
+# ifndef NI_NUMERICHOST
+# define NI_NUMERICHOST 0x01
+# define NI_NUMERICSERV 0x02
+# define NI_NOFQDN 0x04
+# define NI_NAMEREQD 0x08
+# define NI_DGRAM 0x10
+# endif
+
+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
+
+VLC_API const char *gai_strerror( int errnum );
+
+VLC_API int getaddrinfo ( const char *, const char *,
+ const struct addrinfo *, struct addrinfo ** );
+VLC_API void freeaddrinfo( struct addrinfo * );
+VLC_API int getnameinfo ( const struct sockaddr *, socklen_t,
+ char *, int, char *, int, int );
+#endif
+
+VLC_API int vlc_getnameinfo( const struct sockaddr *, int, char *, int, int *, int );
+VLC_API int vlc_getaddrinfo (const char *, unsigned,
+ const struct addrinfo *, struct addrinfo **);
+