91 lines
2.8 KiB
Go
91 lines
2.8 KiB
Go
package watchtower
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import (
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"strconv"
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"time"
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)
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// Conf specifies the watchtower options that can be configured from the command
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// line or configuration file.
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type Conf struct {
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// RawListeners configures the watchtower's listening ports/interfaces.
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RawListeners []string `long:"listen" description:"Add interfaces/ports to listen for peer connections"`
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// RawExternalIPs configures the watchtower's external ports/interfaces.
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RawExternalIPs []string `long:"externalip" description:"Add interfaces/ports where the watchtower can accept peer connections"`
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// ReadTimeout specifies the duration the tower will wait when trying to
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// read a message from a client before hanging up.
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ReadTimeout time.Duration `long:"readtimeout" description:"Duration the watchtower server will wait for messages to be received before hanging up on clients"`
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// WriteTimeout specifies the duration the tower will wait when trying
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// to write a message from a client before hanging up.
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WriteTimeout time.Duration `long:"writetimeout" description:"Duration the watchtower server will wait for messages to be written before hanging up on client connections"`
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}
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// Apply completes the passed Config struct by applying any parsed Conf options.
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// If the corresponding values parsed by Conf are already set in the Config,
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// those fields will be not be modified.
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func (c *Conf) Apply(cfg *Config,
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normalizer AddressNormalizer) (*Config, error) {
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// Set the Config's listening addresses if they are empty.
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if cfg.ListenAddrs == nil {
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// Without a network, we will be unable to resolve the listening
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// addresses.
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if cfg.Net == nil {
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return nil, ErrNoNetwork
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}
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// If no addresses are specified by the Config, we will resort
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// to the default peer port.
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if len(c.RawListeners) == 0 {
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addr := DefaultListenAddr
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c.RawListeners = append(c.RawListeners, addr)
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}
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// Normalize the raw listening addresses so that they can be
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// used by the brontide listener.
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var err error
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cfg.ListenAddrs, err = normalizer(
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c.RawListeners, strconv.Itoa(DefaultPeerPort),
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cfg.Net.ResolveTCPAddr,
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)
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if err != nil {
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return nil, err
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}
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}
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// Set the Config's external ips if they are empty.
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if cfg.ExternalIPs == nil {
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// Without a network, we will be unable to resolve the external
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// IP addresses.
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if cfg.Net == nil {
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return nil, ErrNoNetwork
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}
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var err error
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cfg.ExternalIPs, err = normalizer(
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c.RawExternalIPs, strconv.Itoa(DefaultPeerPort),
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cfg.Net.ResolveTCPAddr,
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)
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if err != nil {
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return nil, err
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}
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}
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// If the Config has no read timeout, we will use the parsed Conf
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// value.
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if cfg.ReadTimeout == 0 && c.ReadTimeout != 0 {
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cfg.ReadTimeout = c.ReadTimeout
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}
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// If the Config has no write timeout, we will use the parsed Conf
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// value.
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if cfg.WriteTimeout == 0 && c.WriteTimeout != 0 {
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cfg.WriteTimeout = c.WriteTimeout
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}
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return cfg, nil
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}
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