for _, tt := range []struct {
		error
		ok bool
	}{
		{syscall.EADDRNOTAVAIL, true},
		{&os.SyscallError{Syscall: "syscall", Err: syscall.EADDRNOTAVAIL}, true},
		{&OpError{Op: "op", Err: syscall.EADDRNOTAVAIL}, true},
		{&OpError{Op: "op", Err: &os.SyscallError{Syscall: "syscall", Err: syscall.EADDRNOTAVAIL}}, true},

		{syscall.EINVAL, false},
		{&os.SyscallError{Syscall: "syscall", Err: syscall.EINVAL}, false},

package syscall

import "runtime"

// TODO: Auto-generate some day. (Hard-coded in binaries so not likely to change.)
const (
	E2BIG           Errno = 1
	EACCES          Errno = 2
	EADDRINUSE      Errno = 3
	EADDRNOTAVAIL   Errno = 4
	EAFNOSUPPORT    Errno = 5
	EAGAIN          Errno = 6
	EALREADY        Errno = 7
	EBADF           Errno = 8
	EBADMSG         Errno = 9
	EBUSY           Errno = 10
	ECANCELED       Errno = 11

const APPLICATION_ERROR = 1 << 29

// Invented values to support what package os and others expects.
const (
	E2BIG Errno = APPLICATION_ERROR + iota
	EACCES
	EADDRINUSE
	EADDRNOTAVAIL
	EADV
	EAFNOSUPPORT
	EAGAIN
	EALREADY
	EBADE
	EBADF
	EBADFD
	EBADMSG
	EBADR
	EBADRQC
	EBADSLT
	EBFONT
	EBUSY
	ECANCELED
	ECHILD
	ECHRNG
	ECOMM
	ECONNABORTED

	"ESOCKTNOSUPPORT": ESOCKTNOSUPPORT,
	"EOPNOTSUPP":      EOPNOTSUPP,
	"EPFNOSUPPORT":    EPFNOSUPPORT,
	"EAFNOSUPPORT":    EAFNOSUPPORT,
	"EADDRINUSE":      EADDRINUSE,
	"EADDRNOTAVAIL":   EADDRNOTAVAIL,
	"ENETDOWN":        ENETDOWN,
	"ENETUNREACH":     ENETUNREACH,
	"ENETRESET":       ENETRESET,
	"ECONNABORTED":    ECONNABORTED,
	"ECONNRESET":      ECONNRESET,
	"ENOBUFS":         ENOBUFS,

	//
	// The opposite can also happen: if we ask the kernel to pick an appropriate
	// originating local address, sometimes it picks one that is already in use.
	// So if the error is EADDRNOTAVAIL, we have to try again too, just for
	// a different reason.
	//
	// The kernel socket code is no doubt enjoying watching us squirm.

	_HIDIOCGRAWNAME                  = 0x40804804
	_HIDIOCGRAWPHYS                  = 0x40404805
	_HIDIOCGRAWUNIQ                  = 0x40404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x7d)
	EADDRNOTAVAIL   = syscall.Errno(0x7e)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x7c)
	EALREADY        = syscall.Errno(0x95)
	EBADE           = syscall.Errno(0x32)

	_HIDIOCGRAWNAME                  = 0x80804804
	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)

	_HIDIOCGRAWNAME                  = 0x80804804
	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)

	_HIDIOCGRAWNAME                  = 0x80804804
	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)

	_HIDIOCGRAWNAME                  = 0x80804804
	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)