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#ifndef WIN32_LEAN_AND_MEAN #define WIN32_LEAN_AND_MEAN #endif #undef __CRT__NO_INLINE #define __CRT__NO_INLINE #include <winsock2.h> #include <ws2tcpip.h> void IN6_SET_ADDR_LOOPBACK(struct in6_addr *a) { *a = (struct in6_addr){0}; a->s6_bytes[15] = 1; }