sa_restorer uintptr
}

type siginfoFields struct {
	si_signo int32
	si_code  int32
	si_errno int32
	// below here is a union; si_addr is the only field we use
	si_addr uint32
}

type siginfo struct {
	siginfoFields

	// Pad struct to the max size in the kernel.
	_ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte
}

	sa_flags    uint64
	sa_restorer uintptr
	sa_mask     uint64
}

type siginfoFields struct {
	si_signo int32
	si_errno int32
	si_code  int32
	// below here is a union; si_addr is the only field we use
	si_addr uint64
}

type siginfo struct {
	siginfoFields

	// Pad struct to the max size in the kernel.
	_ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte
}

// BUG(mikio): On Windows, the File method of IPConn is not
// implemented.

// IPAddr represents the address of an IP end point.
type IPAddr struct {
	IP   IP
	Zone string // IPv6 scoped addressing zone
}

// Network returns the address's network name, "ip".
func (a *IPAddr) Network() string { return "ip" }

func (a *IPAddr) String() string {
	if a == nil {
		return "<nil>"
	}
	ip := ipEmptyString(a.IP)

}

func setupTestData() {
	resolveIPAddrTests = append(resolveIPAddrTests,
		[]resolveIPAddrTest{ // ERROR "\[\]resolveIPAddrTest{...} does not escape"
			{"ip",
				"localhost",
				&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr{...} escapes to heap"
				nil},
			{"ip4",
				"localhost",
				&IPAddr{IP: IPv4(127, 0, 0, 1)}, // ERROR "&IPAddr{...} escapes to heap"
				nil},

	_ [_sigev_max_size - unsafe.Sizeof(sigeventFields{})]byte
}

type siginfoFields struct {
	si_signo int32
	si_errno int32
	si_code  int32
	// below here is a union; si_addr is the only field we use
	si_addr uint32
}

type siginfo struct {
	siginfoFields

	// Pad struct to the max size in the kernel.
	_ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte
}

	"testing"
)

var tesrLocalIPAddrs = func(ips []netip.Addr) ([]net.Addr, error) {
	var IPAddrs []net.Addr
	for i := 0; i < len(ips); i++ {
		var ipAddr net.Addr
		ipNetAddr := &net.IPNet{IP: net.ParseIP(ips[i].String())}
		ipAddr = ipNetAddr
		IPAddrs = append(IPAddrs, ipAddr)
	}
	return IPAddrs, nil
}

func TestGetLocalIP(t *testing.T) {
	tests := []struct {
		name     string
		lipas    func() ([]net.Addr, error)

	// 3) the one passed to us as the raddr parameter.
	lsa, _ = syscall.Getsockname(fd.pfd.Sysfd)
	if crsa != nil {
		fd.setAddr(fd.addrFunc()(lsa), fd.addrFunc()(crsa))
	} else if rsa, _ = syscall.Getpeername(fd.pfd.Sysfd); rsa != nil {
		fd.setAddr(fd.addrFunc()(lsa), fd.addrFunc()(rsa))
	} else {
		fd.setAddr(fd.addrFunc()(lsa), raddr)
	}
	return nil
}

					return nil, os.NewSyscallError("sockaddr", err)
				}
				switch sa := sa.(type) {
				case *syscall.SockaddrInet4:
					ifat = append(ifat, &IPAddr{IP: IPv4(sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3])})
				case *syscall.SockaddrInet6:
					ifa := &IPAddr{IP: make(IP, IPv6len)}
					copy(ifa.IP, sa.Addr[:])
					ifat = append(ifat, ifa)
				}
			}
		}
	}
	return ifat, nil
}

// and ipv6only. It returns every address when the filter is nil.
// The result contains at least one address when error is nil.
func filterAddrList(filter func(IPAddr) bool, ips []IPAddr, inetaddr func(IPAddr) Addr, originalAddr string) (addrList, error) {
	var addrs addrList
	for _, ip := range ips {
		if filter == nil || filter(ip) {
			addrs = append(addrs, inetaddr(ip))
		}
	}

	}
	mockCertChain := []string{"cert", "cert_chain", "root_cert"}
	mockIPAddr := &net.IPAddr{IP: net.IPv4(192, 168, 1, 1)}
	testCerts := map[string]struct {
		certChain    [][]*x509.Certificate
		caller       *security.Caller
		fakeAuthInfo *mockAuthInfo
		code         codes.Code
		ipAddr       *net.IPAddr
	}{
		// no client certificate is presented
		"No client certificate": {
			certChain: nil,