From 30860abddbba8b83f4a103492a003619485fd244 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Thu, 18 Dec 2025 22:42:49 +0000
Subject: [PATCH] Add compression method name lookup in TLS parser

Resolves two TODO comments by implementing a compression method lookup
table similar to the existing cipher suites and extensions lookups.
Now displays human-readable names (null, DEFLATE, LZS) instead of
raw numeric values when parsing TLS compression methods.

Changes:
- Added COMPRESSION_METHODS_LOOKUP constant with standard TLS compression methods
- Updated parseServerHello to use lookup for compression method display
- Updated parseCompressionMethods to use lookup for compression method display
---
 src/core/lib/TLS.mjs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/core/lib/TLS.mjs b/src/core/lib/TLS.mjs
index 6373bfa2..dda3d4c2 100644
--- a/src/core/lib/TLS.mjs
+++ b/src/core/lib/TLS.mjs
@@ -247,7 +247,7 @@ function parseServerHello(s, b, h) {
         description: "Selected Compression Method",
         length: 1,
         data: b.getBytes(1),
-        value: s.readInt(1) // TODO: Compression method name here
+        value: COMPRESSION_METHODS_LOOKUP[s.readInt(1)] || "Unknown"
     };
 
     // Extensions Length
@@ -303,7 +303,7 @@ function parseCompressionMethods(bytes) {
             description: "Compression Method",
             length: 1,
             data: b.getBytes(1),
-            value: s.readInt(1) // TODO: Compression method name here
+            value: COMPRESSION_METHODS_LOOKUP[s.readInt(1)] || "Unknown"
         });
     }
     return cm;
@@ -836,6 +836,15 @@ export const GREASE_VALUES = [
     0xfafa
 ];
 
+/**
+ * Compression methods lookup table
+ */
+const COMPRESSION_METHODS_LOOKUP = {
+    0: "null",
+    1: "DEFLATE",
+    64: "LZS"
+};
+
 /**
  * Parses the supported_versions extension and returns the highest supported version.
  * @param {Uint8Array} bytes