62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
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package dnsmasq
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import (
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"fmt"
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"os"
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"strconv"
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"strings"
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"time"
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)
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type Lease struct {
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ExpireDate time.Time
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Mac string
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IP string
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Hostname string
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ClientID string
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}
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func (l Lease) String() string {
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return fmt.Sprintf("[expire on %v]: host %s IP %s (mac %s - clientID %s)", l.ExpireDate, l.Hostname, l.IP, l.Mac, l.ClientID)
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}
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func parseLeaseLine(rawLine string) (*Lease, error) {
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lineValues := strings.Split(rawLine, " ")
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if len(lineValues) != 5 {
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return nil, fmt.Errorf("unexpected number of values, expected 5, got %d", len(lineValues))
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}
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expireTimeInt, err := strconv.Atoi(lineValues[0])
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if err != nil {
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return nil, fmt.Errorf("unexpected unix timestamp value %s", lineValues[0])
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}
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return &Lease{
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ExpireDate: time.Unix(int64(expireTimeInt), 0),
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Mac: lineValues[1],
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IP: lineValues[2],
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Hostname: lineValues[3],
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ClientID: lineValues[4],
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}, nil
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}
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func GetLeases(leasesPath string) ([]*Lease, error) {
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fileContent, err := os.ReadFile(leasesPath)
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if err != nil {
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return nil, fmt.Errorf("failed to read leases file: %w", err)
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}
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leases := []*Lease{}
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for i, l := range strings.Split(string(fileContent), "\n") {
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if l == "" {
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continue
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}
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lease, err := parseLeaseLine(l)
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if err != nil {
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return nil, fmt.Errorf("failed to parse line %d: %w", i, err)
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}
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leases = append(leases, lease)
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}
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return leases, nil
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}
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