From 889c8f41f78df3dbb24311c7b11286d76fb7089f Mon Sep 17 00:00:00 2001
From: Andras Fekete <andras@wolfssl.com>
Date: Thu, 26 Sep 2024 12:45:59 -0400
Subject: [PATCH] Allow the sniffer to print the trace to STDOUT

---
 src/sniffer.c        | 14 +++++++++-----
 sslSniffer/README.md |  2 +-
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/sniffer.c b/src/sniffer.c
index 6921e07a0f..e4ceb4984e 100644
--- a/src/sniffer.c
+++ b/src/sniffer.c
@@ -6866,11 +6866,15 @@ int ssl_Trace(const char* traceFile, char* error)
     if (traceFile) {
         /* Don't try to reopen the file */
         if (TraceFile == NULL) {
-            TraceFile = XFOPEN(traceFile, "a");
-            if (!TraceFile) {
-                SetError(BAD_TRACE_FILE_STR, error, NULL, 0);
-                return WOLFSSL_FATAL_ERROR;
-             }
+            if (XSTRCMP(traceFile, "-") == 0) {
+                TraceFile = stdout;
+            } else {
+                TraceFile = XFOPEN(traceFile, "a");
+                if (!TraceFile) {
+                    SetError(BAD_TRACE_FILE_STR, error, NULL, 0);
+                    return WOLFSSL_FATAL_ERROR;
+                }
+            }
             TraceOn = 1;
         }
     }
diff --git a/sslSniffer/README.md b/sslSniffer/README.md
index 27a6f52781..dbf68955ed 100644
--- a/sslSniffer/README.md
+++ b/sslSniffer/README.md
@@ -197,7 +197,7 @@ Frees all resources consumed by the wolfSSL sniffer and should be called when us
 int ssl_Trace(const char* traceFile, char* error);
 ```
 
-Enables Tracing when a file is passed in.  Disables Tracing if previously on and a NULL value is passed in for the file.
+Enables Tracing when a file is passed in. When `traceFile` is "-", then the trace will be printed to STDOUT. Disables Tracing if previously on and a NULL value is passed in for the file.
 
 Returns Values: