004c5fca9d
Abstract the caddy call and make it simpler. See #3261 for some part of the discussion. Go from: ~~~ go func init() { caddy.RegisterPlugin("any", caddy.Plugin{ ServerType: "dns", Action: setup, }) } ~~~ To: ~~~ go func init() { plugin.Register("any", setup) } ~~~ This requires some external documents in coredns.io to be updated as well; the old way still works, so it's backwards compatible. Signed-off-by: Miek Gieben <miek@miek.nl>
114 lines
2.3 KiB
Go
114 lines
2.3 KiB
Go
package erratic
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import (
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"fmt"
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"strconv"
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"time"
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"github.com/coredns/coredns/core/dnsserver"
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"github.com/coredns/coredns/plugin"
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"github.com/caddyserver/caddy"
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)
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func init() { plugin.Register("erratic", setup) }
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func setup(c *caddy.Controller) error {
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e, err := parseErratic(c)
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if err != nil {
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return plugin.Error("erratic", err)
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}
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dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
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return e
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})
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return nil
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}
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func parseErratic(c *caddy.Controller) (*Erratic, error) {
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e := &Erratic{drop: 2}
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drop := false // true if we've seen the drop keyword
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for c.Next() { // 'erratic'
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for c.NextBlock() {
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switch c.Val() {
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case "drop":
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args := c.RemainingArgs()
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if len(args) > 1 {
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return nil, c.ArgErr()
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}
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if len(args) == 0 {
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continue
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}
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amount, err := strconv.ParseInt(args[0], 10, 32)
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if err != nil {
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return nil, err
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}
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if amount < 0 {
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return nil, fmt.Errorf("illegal amount value given %q", args[0])
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}
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e.drop = uint64(amount)
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drop = true
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case "delay":
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args := c.RemainingArgs()
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if len(args) > 2 {
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return nil, c.ArgErr()
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}
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// Defaults.
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e.delay = 2
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e.duration = 100 * time.Millisecond
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if len(args) == 0 {
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continue
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}
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amount, err := strconv.ParseInt(args[0], 10, 32)
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if err != nil {
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return nil, err
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}
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if amount < 0 {
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return nil, fmt.Errorf("illegal amount value given %q", args[0])
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}
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e.delay = uint64(amount)
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if len(args) > 1 {
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duration, err := time.ParseDuration(args[1])
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if err != nil {
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return nil, err
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}
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e.duration = duration
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}
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case "truncate":
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args := c.RemainingArgs()
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if len(args) > 1 {
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return nil, c.ArgErr()
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}
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if len(args) == 0 {
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continue
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}
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amount, err := strconv.ParseInt(args[0], 10, 32)
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if err != nil {
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return nil, err
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}
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if amount < 0 {
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return nil, fmt.Errorf("illegal amount value given %q", args[0])
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}
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e.truncate = uint64(amount)
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case "large":
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e.large = true
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default:
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return nil, c.Errf("unknown property '%s'", c.Val())
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}
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}
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}
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if (e.delay > 0 || e.truncate > 0) && !drop { // delay is set, but we've haven't seen a drop keyword, remove default drop stuff
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e.drop = 0
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}
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return e, nil
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}
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