9ac3cab1b7
* Make CoreDNS a server type plugin for Caddy Remove code we don't need and port all middleware over. Fix all tests and rework the documentation. Also make `go generate` build a caddy binary which we then copy into our directory. This means `go build`-builds remain working as-is. And new etc instances in each etcd test for better isolation. Fix more tests and rework test.Server with the newer support Caddy offers. Fix Makefile to support new mode of operation.
143 lines
3 KiB
Go
143 lines
3 KiB
Go
package file
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import (
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"fmt"
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"net"
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"os"
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"github.com/miekg/coredns/core/dnsserver"
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"github.com/miekg/coredns/middleware"
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"github.com/mholt/caddy"
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)
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func init() {
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caddy.RegisterPlugin("file", 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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zones, err := fileParse(c)
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if err != nil {
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return err
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}
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// Add startup functions to notify the master(s).
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for _, n := range zones.Names {
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c.OnStartup(func() error {
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zones.Z[n].StartupOnce.Do(func() {
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if len(zones.Z[n].TransferTo) > 0 {
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zones.Z[n].Notify()
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}
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zones.Z[n].Reload(nil)
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})
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return nil
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})
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}
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dnsserver.GetConfig(c).AddMiddleware(func(next dnsserver.Handler) dnsserver.Handler {
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return File{Next: next, Zones: zones}
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})
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return nil
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}
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func fileParse(c *caddy.Controller) (Zones, error) {
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z := make(map[string]*Zone)
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names := []string{}
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origins := []string{}
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for c.Next() {
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if c.Val() == "file" {
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// file db.file [zones...]
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if !c.NextArg() {
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return Zones{}, c.ArgErr()
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}
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fileName := c.Val()
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origins = make([]string, len(c.ServerBlockKeys))
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copy(origins, c.ServerBlockKeys)
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args := c.RemainingArgs()
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if len(args) > 0 {
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origins = args
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}
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reader, err := os.Open(fileName)
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if err != nil {
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// bail out
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return Zones{}, err
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}
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for i, _ := range origins {
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origins[i] = middleware.Host(origins[i]).Normalize()
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zone, err := Parse(reader, origins[i], fileName)
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if err == nil {
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z[origins[i]] = zone
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} else {
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return Zones{}, err
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}
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names = append(names, origins[i])
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}
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noReload := false
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for c.NextBlock() {
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t, _, e := TransferParse(c)
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if e != nil {
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return Zones{}, e
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}
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switch c.Val() {
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case "no_reload":
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noReload = true
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}
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// discard from, here, maybe check and show log when we do?
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for _, origin := range origins {
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if t != nil {
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z[origin].TransferTo = append(z[origin].TransferTo, t...)
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}
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z[origin].NoReload = noReload
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}
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}
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}
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}
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return Zones{Z: z, Names: names}, nil
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}
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// TransferParse parses transfer statements: 'transfer to [address...]'.
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// Exported so secondary can use this as well.
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func TransferParse(c *caddy.Controller) (tos, froms []string, err error) {
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what := c.Val()
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if !c.NextArg() {
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return nil, nil, c.ArgErr()
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}
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value := c.Val()
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switch what {
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case "transfer":
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if value == "to" {
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tos = c.RemainingArgs()
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for i, _ := range tos {
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if tos[i] != "*" {
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if x := net.ParseIP(tos[i]); x == nil {
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return nil, nil, fmt.Errorf("must specify an IP addres: `%s'", tos[i])
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}
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tos[i] = middleware.Addr(tos[i]).Normalize()
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}
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}
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}
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if value == "from" {
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froms = c.RemainingArgs()
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for i, _ := range froms {
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if froms[i] != "*" {
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if x := net.ParseIP(froms[i]); x == nil {
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return nil, nil, fmt.Errorf("must specify an IP addres: `%s'", froms[i])
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}
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froms[i] = middleware.Addr(froms[i]).Normalize()
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} else {
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return nil, nil, fmt.Errorf("can't use '*' in transfer from")
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}
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}
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}
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}
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return
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}
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