IS_IPV4_UNUSABLE_ADDRESS 391 net/sctp/protocol.c if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) IS_IPV4_UNUSABLE_ADDRESS 443 net/sctp/protocol.c if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) {