80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
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package diag
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"time"
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)
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func leaseValid(fn string) (status string, _ error) {
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var lease struct {
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ValidUntil time.Time `json:"valid_until"`
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}
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b, err := ioutil.ReadFile(fn)
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if err != nil {
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return "", err
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}
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if err := json.Unmarshal(b, &lease); err != nil {
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return "", err
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}
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if time.Now().After(lease.ValidUntil) {
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return "", fmt.Errorf("lease expired at %v", lease.ValidUntil)
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}
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return fmt.Sprintf("lease valid until %v", lease.ValidUntil), nil
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}
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type dhcpv4 struct {
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children []Node
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}
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func (d *dhcpv4) String() string {
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return "dhcp4"
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}
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func (d *dhcpv4) Then(t Node) Node {
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d.children = append(d.children, t)
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return d
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}
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func (d *dhcpv4) Children() []Node {
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return d.children
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}
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func (d *dhcpv4) Evaluate() (string, error) {
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return leaseValid("/perm/dhcp4/wire/lease.json")
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}
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// DHCPv4 returns a Node which succeeds if /perm/dhcp4/wire/lease.json contains
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// a non-expired DHCPv4 lease.
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func DHCPv4() Node {
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return &dhcpv4{}
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}
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type dhcpv6 struct {
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children []Node
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}
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func (d *dhcpv6) String() string {
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return "dhcp6"
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}
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func (d *dhcpv6) Then(t Node) Node {
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d.children = append(d.children, t)
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return d
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}
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func (d *dhcpv6) Children() []Node {
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return d.children
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}
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func (d *dhcpv6) Evaluate() (string, error) {
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return leaseValid("/perm/dhcp6/wire/lease.json")
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}
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// DHCPv6 returns a Node which succeeds if /perm/dhcp6/wire/lease.json contains
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// a non-expired DHCPv6 lease.
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func DHCPv6() Node {
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return &dhcpv6{}
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}
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