IPV6_V6ONLY       334 src/unix/udp.c #ifdef IPV6_V6ONLY
IPV6_V6ONLY       336 src/unix/udp.c     if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof yes) == -1) {
IPV6_V6ONLY       209 src/win/udp.c                 IPV6_V6ONLY,
IPV6_V6ONLY        45 src/win/winsock.h #ifndef IPV6_V6ONLY