vendor: update package

vendor/github.com/hashicorp/yamux/go.mod

@@ -0,0 +1 @@
+module github.com/hashicorp/yamux

vendor/github.com/hashicorp/yamux/mux.go

@@ -3,6 +3,7 @@ package yamux
 import (
 	"fmt"
 	"io"
+	"log"
 	"os"
 	"time"
 )
@@ -30,8 +31,13 @@ type Config struct {
 	// window size that we allow for a stream.
 	MaxStreamWindowSize uint32
 
-	// LogOutput is used to control the log destination
+	// LogOutput is used to control the log destination. Either Logger or
+	// LogOutput can be set, not both.
 	LogOutput io.Writer
+
+	// Logger is used to pass in the logger to be used. Either Logger or
+	// LogOutput can be set, not both.
+	Logger *log.Logger
 }
 
 // DefaultConfig is used to return a default configuration
@@ -57,6 +63,11 @@ func VerifyConfig(config *Config) error {
 	if config.MaxStreamWindowSize < initialStreamWindow {
 		return fmt.Errorf("MaxStreamWindowSize must be larger than %d", initialStreamWindow)
 	}
+	if config.LogOutput != nil && config.Logger != nil {
+		return fmt.Errorf("both Logger and LogOutput may not be set, select one")
+	} else if config.LogOutput == nil && config.Logger == nil {
+		return fmt.Errorf("one of Logger or LogOutput must be set, select one")
+	}
 	return nil
 }
 

vendor/github.com/hashicorp/yamux/session.go

@@ -86,9 +86,14 @@ type sendReady struct {
 
 // newSession is used to construct a new session
 func newSession(config *Config, conn io.ReadWriteCloser, client bool) *Session {
+	logger := config.Logger
+	if logger == nil {
+		logger = log.New(config.LogOutput, "", log.LstdFlags)
+	}
+
 	s := &Session{
 		config:     config,
-		logger:     log.New(config.LogOutput, "", log.LstdFlags),
+		logger:     logger,
 		conn:       conn,
 		bufRead:    bufio.NewReader(conn),
 		pings:      make(map[uint32]chan struct{}),
@@ -309,8 +314,10 @@ func (s *Session) keepalive() {
 		case <-time.After(s.config.KeepAliveInterval):
 			_, err := s.Ping()
 			if err != nil {
+				if err != ErrSessionShutdown {
 					s.logger.Printf("[ERR] yamux: keepalive failed: %v", err)
 					s.exitErr(ErrKeepAliveTimeout)
+				}
 				return
 			}
 		case <-s.shutdownCh:

vendor/modules.txt

@@ -23,7 +23,7 @@ github.com/gorilla/context
 github.com/gorilla/mux
 # github.com/gorilla/websocket v1.2.0
 github.com/gorilla/websocket
-# github.com/hashicorp/yamux v0.0.0-20180314200745-2658be15c5f0
+# github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d
 github.com/hashicorp/yamux
 # github.com/inconshreveable/mousetrap v1.0.0
 github.com/inconshreveable/mousetrap
@@ -61,11 +61,11 @@ golang.org/x/crypto/twofish
 golang.org/x/crypto/xtea
 golang.org/x/crypto/salsa20/salsa
 # golang.org/x/net v0.0.0-20180524181706-dfa909b99c79
-golang.org/x/net/ipv4
 golang.org/x/net/websocket
-golang.org/x/net/bpf
-golang.org/x/net/internal/iana
-golang.org/x/net/internal/socket
 golang.org/x/net/context
 golang.org/x/net/proxy
+golang.org/x/net/ipv4
 golang.org/x/net/internal/socks
+golang.org/x/net/bpf
+golang.org/x/net/internal/iana
+golang.org/x/net/internal/socket