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Clean up verifyUniqueListners 

The first pass over this was a hackjob in the sense that it was not elegant.  Fixed.

Pointed out by: subcionscious in the middle of the night
This commit is contained in:
Sean Chittenden 2016-04-04 11:03:49 -07:00
parent af0f87ed90
commit 80cfe3d1ab
1 changed files with 25 additions and 42 deletions
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67
command/agent/command.go
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@ -310,61 +310,44 @@ func (c *Command) readConfig() *Config {
// verifyUniqueListeners checks to see if an address was used more than once in
// the config
func (config *Config) verifyUniqueListeners() error {
listeners := []struct {
host string
port int
descr string
}{
{config.Addresses.RPC, config.Ports.RPC, "RPC"},
{config.Addresses.DNS, config.Ports.DNS, "DNS"},
{config.Addresses.HTTP, config.Ports.HTTP, "HTTP"},
{config.Addresses.HTTPS, config.Ports.HTTPS, "HTTPS"},
{config.AdvertiseAddr, config.Ports.Server, "Server RPC"},
{config.AdvertiseAddr, config.Ports.SerfLan, "Serf LAN"},
{config.AdvertiseAddr, config.Ports.SerfWan, "Serf WAN"},
}
type key struct {
host string
port int
}
const numUniqueAddrs = 7
m := make(map[key]string, numUniqueAddrs)
m := make(map[key]string, len(listeners))
testFunc := func(k key, descr string) error {
if k.host == "" {
k.host = "0.0.0.0"
} else if strings.HasPrefix(k.host, "unix") {
for _, l := range listeners {
if l.host == "" {
l.host = "0.0.0.0"
} else if strings.HasPrefix(l.host, "unix") {
// Don't compare ports on unix sockets
k.port = 0
l.port = 0
}
if k.host == "0.0.0.0" && k.port <= 0 {
return nil
if l.host == "0.0.0.0" && l.port <= 0 {
continue
}
k := key{l.host, l.port}
v, ok := m[k]
if ok {
return fmt.Errorf("%s address already configured for %s", descr, v)
return fmt.Errorf("%s address already configured for %s", l.descr, v)
}
m[k] = descr
return nil
m[k] = l.descr
}
if err := testFunc(key{config.Addresses.RPC, config.Ports.RPC}, "RPC"); err != nil {
return err
}
if err := testFunc(key{config.Addresses.DNS, config.Ports.DNS}, "DNS"); err != nil {
return err
}
if err := testFunc(key{config.Addresses.HTTP, config.Ports.HTTP}, "HTTP"); err != nil {
return err
}
if err := testFunc(key{config.Addresses.HTTPS, config.Ports.HTTPS}, "HTTPS"); err != nil {
return err
}
if err := testFunc(key{config.AdvertiseAddr, config.Ports.Server}, "Server RPC"); err != nil {
return err
}
if err := testFunc(key{config.AdvertiseAddr, config.Ports.SerfLan}, "Serf LAN"); err != nil {
return err
}
if err := testFunc(key{config.AdvertiseAddr, config.Ports.SerfWan}, "Serf WAN"); err != nil {
return err
}
return nil
}