r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
bind$inet6(r0, &(0x7f0000000140)={0xa, 0x4e20, 0x0, @ipv4={'\x00', '\xff\xff', @empty}}, 0x1c)
connect$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20, 0x0, @empty}, 0x1c)
setsockopt$inet6_tcp_int(0xffffffffffffffff, 0x6, 0x0, 0x0, 0x0)
sendmsg$inet6(r0, &(0x7f00000006c0)={0x0, 0x0, &(0x7f00000000c0)=[{&(0x7f0000000080)="16", 0x1}, {&(0x7f0000000200)}], 0x2}, 0x10044001)
ioctl$sock_inet6_tcp_SIOCATMARK(r0, 0x541b, &(0x7f0000000180))