forked from coredns/coredns
/
setup.go
97 lines (84 loc) · 2.09 KB
/
setup.go
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package log
import (
"github.com/coredns/coredns/core/dnsserver"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/pkg/response"
"github.com/mholt/caddy"
"github.com/miekg/dns"
)
func init() {
caddy.RegisterPlugin("log", caddy.Plugin{
ServerType: "dns",
Action: setup,
})
}
func setup(c *caddy.Controller) error {
rules, err := logParse(c)
if err != nil {
return plugin.Error("log", err)
}
dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
return Logger{Next: next, Rules: rules, ErrorFunc: dnsserver.DefaultErrorFunc}
})
return nil
}
func logParse(c *caddy.Controller) ([]Rule, error) {
var rules []Rule
for c.Next() {
args := c.RemainingArgs()
if len(args) == 0 {
// Nothing specified; use defaults
rules = append(rules, Rule{
NameScope: ".",
Format: DefaultLogFormat,
Class: make(map[response.Class]struct{}),
})
} else if len(args) == 1 {
rules = append(rules, Rule{
NameScope: dns.Fqdn(args[0]),
Format: DefaultLogFormat,
Class: make(map[response.Class]struct{}),
})
} else {
// Name scope, and maybe a format specified
format := DefaultLogFormat
switch args[1] {
case "{common}":
format = CommonLogFormat
case "{combined}":
format = CombinedLogFormat
default:
format = args[1]
}
rules = append(rules, Rule{
NameScope: dns.Fqdn(args[0]),
Format: format,
Class: make(map[response.Class]struct{}),
})
}
// Class refinements in an extra block.
for c.NextBlock() {
switch c.Val() {
// class followed by combinations of all, denial, error and success.
case "class":
classes := c.RemainingArgs()
if len(classes) == 0 {
return nil, c.ArgErr()
}
for _, c := range classes {
cls, err := response.ClassFromString(c)
if err != nil {
return nil, err
}
rules[len(rules)-1].Class[cls] = struct{}{}
}
default:
return nil, c.ArgErr()
}
}
if len(rules[len(rules)-1].Class) == 0 {
rules[len(rules)-1].Class[response.All] = struct{}{}
}
}
return rules, nil
}