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Add Pty.TerminalModes #131

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Add Pty.TerminalModes #131

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8b19b11
Add Pty.Termmodes
elfgzp Dec 16, 2019
25548d7
Update ssh.go
elfgzp Dec 16, 2019
38f1cb6
Update Pty.Termmodes -> Pty.TerminalModes
elfgzp Dec 16, 2019
59267f6
Update ssh.go & util.go
elfgzp Dec 17, 2019
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9 changes: 8 additions & 1 deletion session_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,9 @@ func TestPty(t *testing.T) {
term := "xterm"
winWidth := 40
winHeight := 80
termModes := make(gossh.TerminalModes)
ttyOPOSPEED := uint32(38400)
termModes[gossh.TTY_OP_OSPEED] = ttyOPOSPEED
done := make(chan bool)
session, _, cleanup := newTestSession(t, &Server{
Handler: func(s Session) {
Expand All @@ -215,11 +218,15 @@ func TestPty(t *testing.T) {
if ptyReq.Window.Height != winHeight {
t.Fatalf("expected window height %#v but got %#v", winHeight, ptyReq.Window.Height)
}
mode := ptyReq.Termmodes[gossh.TTY_OP_OSPEED]
if ptyReq.Termmodes[gossh.TTY_OP_OSPEED] != ttyOPOSPEED {
t.Fatalf("expected mode %#v but got %#v", ttyOPOSPEED, mode)
}
close(done)
},
}, nil)
defer cleanup()
if err := session.RequestPty(term, winHeight, winWidth, gossh.TerminalModes{}); err != nil {
if err := session.RequestPty(term, winHeight, winWidth, termModes); err != nil {
t.Fatalf("expected nil but got %v", err)
}
if err := session.Shell(); err != nil {
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6 changes: 3 additions & 3 deletions ssh.go
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Expand Up @@ -72,9 +72,9 @@ type Window struct {

// Pty represents a PTY request and configuration.
type Pty struct {
Term string
Window Window
// HELP WANTED: terminal modes!
Term string
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This looks like it needs a gofmt

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Oh sorry, I forgot it. I will modify this.

Window Window
Termmodes gossh.TerminalModes
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}

// Serve accepts incoming SSH connections on the listener l, creating a new
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57 changes: 43 additions & 14 deletions util.go
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Expand Up @@ -8,6 +8,19 @@ import (
"golang.org/x/crypto/ssh"
)

type ptyRequestMsg struct {
Term string
Columns uint32
Rows uint32
Width uint32
Height uint32
Modelist string
}

const (
ttyOPEND = 0
)

func generateSigner() (ssh.Signer, error) {
key, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
Expand All @@ -17,26 +30,42 @@ func generateSigner() (ssh.Signer, error) {
}

func parsePtyRequest(s []byte) (pty Pty, ok bool) {
term, s, ok := parseString(s)
if !ok {
return
}
width32, s, ok := parseUint32(s)
if !ok {
return
reqMsg := &ptyRequestMsg{}
err := ssh.Unmarshal(s, reqMsg)
if err != nil {
return Pty{}, false
}
height32, _, ok := parseUint32(s)
if !ok {
return

modes := []byte(reqMsg.Modelist)

mode := struct {
Key uint8
Val uint32
}{}

termModes := make(ssh.TerminalModes, 0)
for {
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The description on how terminal modes are actually passed can be found here: https://tools.ietf.org/html/rfc4254#section-8

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I'm not sure if I understand what you mean. Do you mean to set terminal modes to []byte type?

if len(modes) < 1 || modes[0] == ttyOPEND || len(modes) < 5 {
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This actually handles 2 different conditions - I'd argue len(modes) < 1 || modes[0] == ttyOPEND are success, but len(modes) < 5 is a failure.

break
}
b := modes[:5]
err = ssh.Unmarshal(b, &mode)
if err != nil {
return Pty{}, false
}
termModes[mode.Key] = mode.Val
modes = modes[6:]
}

pty = Pty{
Term: term,
Term: reqMsg.Term,
Window: Window{
Width: int(width32),
Height: int(height32),
Width: int(reqMsg.Columns),
Height: int(reqMsg.Rows),
},
Termmodes: termModes,
}
return
return pty, true
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These are already implicitly returned because of the named params. Please either switch back to the implicit return or remove the variable names from the function definition.

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👌

}

func parseWinchRequest(s []byte) (win Window, ok bool) {
Expand Down