| // Copyright 2015 CoreOS, Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package activation |
| |
| import ( |
| "crypto/tls" |
| "net" |
| ) |
| |
| // Listeners returns a slice containing a net.Listener for each matching socket type |
| // passed to this process. |
| // |
| // The order of the file descriptors is preserved in the returned slice. |
| // Nil values are used to fill any gaps. For example if systemd were to return file descriptors |
| // corresponding with "udp, tcp, tcp", then the slice would contain {nil, net.Listener, net.Listener} |
| func Listeners() ([]net.Listener, error) { |
| files := Files(true) |
| listeners := make([]net.Listener, len(files)) |
| |
| for i, f := range files { |
| if pc, err := net.FileListener(f); err == nil { |
| listeners[i] = pc |
| f.Close() |
| } |
| } |
| return listeners, nil |
| } |
| |
| // ListenersWithNames maps a listener name to a set of net.Listener instances. |
| func ListenersWithNames() (map[string][]net.Listener, error) { |
| files := Files(true) |
| listeners := map[string][]net.Listener{} |
| |
| for _, f := range files { |
| if pc, err := net.FileListener(f); err == nil { |
| current, ok := listeners[f.Name()] |
| if !ok { |
| listeners[f.Name()] = []net.Listener{pc} |
| } else { |
| listeners[f.Name()] = append(current, pc) |
| } |
| f.Close() |
| } |
| } |
| return listeners, nil |
| } |
| |
| // TLSListeners returns a slice containing a net.listener for each matching TCP socket type |
| // passed to this process. |
| // It uses default Listeners func and forces TCP sockets handlers to use TLS based on tlsConfig. |
| func TLSListeners(tlsConfig *tls.Config) ([]net.Listener, error) { |
| listeners, err := Listeners() |
| |
| if listeners == nil || err != nil { |
| return nil, err |
| } |
| |
| if tlsConfig != nil && err == nil { |
| for i, l := range listeners { |
| // Activate TLS only for TCP sockets |
| if l.Addr().Network() == "tcp" { |
| listeners[i] = tls.NewListener(l, tlsConfig) |
| } |
| } |
| } |
| |
| return listeners, err |
| } |
| |
| // TLSListenersWithNames maps a listener name to a net.Listener with |
| // the associated TLS configuration. |
| func TLSListenersWithNames(tlsConfig *tls.Config) (map[string][]net.Listener, error) { |
| listeners, err := ListenersWithNames() |
| |
| if listeners == nil || err != nil { |
| return nil, err |
| } |
| |
| if tlsConfig != nil && err == nil { |
| for _, ll := range listeners { |
| // Activate TLS only for TCP sockets |
| for i, l := range ll { |
| if l.Addr().Network() == "tcp" { |
| ll[i] = tls.NewListener(l, tlsConfig) |
| } |
| } |
| } |
| } |
| |
| return listeners, err |
| } |