Hi Peter, > can_ioctl_data_s is in a 32-bit union. > https://github.com/apache/nuttx/blob/40c6af6dec0d769ac57f69e89709f9d6310ee0c6/include/net/if.h#L299 > Making it 64-bit would break that union.
Maybe I am missing something. AFAIU can_ioctl_data_s is already 64-bit (it includes 4 uint16_t members). Other members of the ifr_ifru union are 32-bit (ifru_flags, for example) and some others are 64-bit (most ioctl structures), some depend on the arch (ifru_data, which is a pointer) and in fact struct sockaddr is even bigger (sa_data itself is 14-byte already). So I do not see a problem in increasing can_ioctl_data_s to 16+32+16+32 = 96 bits. BR Carlos
