package std

import "hakurei.app/ext"

type (
	// ScmpErrno represents an errno value passed to libseccomp via [NativeRule.Errno].
	ScmpErrno = ext.Int

	// ScmpCompare is equivalent to enum scmp_compare;
	ScmpCompare = ext.Uint
	// ScmpDatum is equivalent to scmp_datum_t.
	ScmpDatum = uint64

	// ScmpArgCmp is equivalent to struct scmp_arg_cmp.
	ScmpArgCmp struct {
		// argument number, starting at 0
		Arg ext.Uint `json:"arg"`
		// the comparison op, e.g. SCMP_CMP_*
		Op ScmpCompare `json:"op"`

		DatumA ScmpDatum `json:"a,omitempty"`
		DatumB ScmpDatum `json:"b,omitempty"`
	}

	// A NativeRule specifies an arch-specific action taken by seccomp under certain conditions.
	NativeRule struct {
		// Syscall is the arch-dependent syscall number to act against.
		Syscall ext.SyscallNum `json:"syscall"`
		// Errno is the errno value to return when the condition is satisfied.
		Errno ScmpErrno `json:"errno"`
		// Arg is the optional struct scmp_arg_cmp passed to libseccomp.
		Arg *ScmpArgCmp `json:"arg,omitempty"`
	}
)
