109 lines
2.3 KiB
Go
109 lines
2.3 KiB
Go
package log
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import (
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"log"
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"os"
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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/coredns/coredns/plugin/pkg/response"
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"github.com/mholt/caddy"
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"github.com/miekg/dns"
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)
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func init() {
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caddy.RegisterPlugin("log", caddy.Plugin{
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ServerType: "dns",
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Action: setup,
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})
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}
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func setup(c *caddy.Controller) error {
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rules, err := logParse(c)
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if err != nil {
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return plugin.Error("log", err)
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}
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// Open the log files for writing when the server starts
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c.OnStartup(func() error {
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for i := 0; i < len(rules); i++ {
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rules[i].Log = log.New(os.Stdout, "", 0)
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}
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return nil
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})
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dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
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return Logger{Next: next, Rules: rules, ErrorFunc: dnsserver.DefaultErrorFunc}
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})
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return nil
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}
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func logParse(c *caddy.Controller) ([]Rule, error) {
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var rules []Rule
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for c.Next() {
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args := c.RemainingArgs()
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if len(args) == 0 {
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// Nothing specified; use defaults
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rules = append(rules, Rule{
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NameScope: ".",
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Format: DefaultLogFormat,
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Class: make(map[response.Class]bool),
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})
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} else if len(args) == 1 {
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rules = append(rules, Rule{
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NameScope: dns.Fqdn(args[0]),
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Format: DefaultLogFormat,
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Class: make(map[response.Class]bool),
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})
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} else {
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// Name scope, and maybe a format specified
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format := DefaultLogFormat
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switch args[1] {
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case "{common}":
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format = CommonLogFormat
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case "{combined}":
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format = CombinedLogFormat
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default:
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format = args[1]
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}
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rules = append(rules, Rule{
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NameScope: dns.Fqdn(args[0]),
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Format: format,
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Class: make(map[response.Class]bool),
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})
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}
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// Class refinements in an extra block.
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for c.NextBlock() {
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switch c.Val() {
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// class followed by combinations of all, denial, error and success.
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case "class":
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classes := c.RemainingArgs()
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if len(classes) == 0 {
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return nil, c.ArgErr()
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}
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for _, c := range classes {
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cls, err := response.ClassFromString(c)
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if err != nil {
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return nil, err
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}
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rules[len(rules)-1].Class[cls] = true
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}
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default:
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return nil, c.ArgErr()
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}
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}
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if len(rules[len(rules)-1].Class) == 0 {
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rules[len(rules)-1].Class[response.All] = true
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}
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}
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return rules, nil
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}
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