From af174933d6718d051622a5153e24806242c62d3d Mon Sep 17 00:00:00 2001
From: Eugene Pankov <john.pankov@gmail.com>
Date: Sun, 15 Aug 2021 19:58:28 +0200
Subject: [PATCH] telnet: fixed size negotiation order

---
 tabby-telnet/src/session.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/tabby-telnet/src/session.ts b/tabby-telnet/src/session.ts
index f83fbf9f..d44ad7ed 100644
--- a/tabby-telnet/src/session.ts
+++ b/tabby-telnet/src/session.ts
@@ -170,7 +170,7 @@ export class TelnetSession extends BaseSession {
                 }
                 if (command === TelnetCommands.DO) {
                     if (option === TelnetOptions.NEGO_WINDOW_SIZE) {
-                        this.resize(0, 0)
+                        this.emitSize()
                     } else if (option === TelnetOptions.ECHO) {
                         this.echoEnabled = true
                         this.emitTelnet(TelnetCommands.WILL, option)
@@ -210,10 +210,18 @@ export class TelnetSession extends BaseSession {
             this.lastHeight = h
         }
         if (this.lastWidth && this.lastHeight && this.telnetProtocol) {
+            this.emitSize()
+        }
+    }
+
+    private emitSize () {
+        if (this.lastWidth && this.lastHeight) {
             this.emitTelnetSuboption(TelnetOptions.NEGO_WINDOW_SIZE, Buffer.from([
                 this.lastWidth >> 8, this.lastWidth & 0xff,
                 this.lastHeight >> 8, this.lastHeight & 0xff,
             ]))
+        } else {
+            this.emitTelnet(TelnetCommands.WONT, TelnetOptions.NEGO_WINDOW_SIZE)
         }
     }
 
-- 
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