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// Package parse contains functions that can be used in the setup code for plugins.
package parse
import (
"fmt"
"github.com/coredns/caddy"
"github.com/coredns/coredns/plugin/pkg/transport"
)
// Transfer parses transfer statements: 'transfer [to|from] [address...]'.
func Transfer(c *caddy.Controller, secondary bool) (tos, froms []string, err error) {
if !c.NextArg() {
return nil, nil, c.ArgErr()
}
value := c.Val()
switch value {
case "to":
tos = c.RemainingArgs()
for i := range tos {
if tos[i] != "*" {
normalized, err := HostPort(tos[i], transport.Port)
if err != nil {
return nil, nil, err
}
tos[i] = normalized
}
}
case "from":
if !secondary {
return nil, nil, fmt.Errorf("can't use `transfer from` when not being a secondary")
}
froms = c.RemainingArgs()
for i := range froms {
if froms[i] != "*" {
normalized, err := HostPort(froms[i], transport.Port)
if err != nil {
return nil, nil, err
}
froms[i] = normalized
} else {
return nil, nil, fmt.Errorf("can't use '*' in transfer from")
}
}
}
return
}
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