From 0395f9edc71e199caa34b7d1b484aca7791d47db Mon Sep 17 00:00:00 2001
From: Metin Cakircali <metin.cakircali@ecmwf.int>
Date: Tue, 14 Jan 2025 15:38:19 +0100
Subject: [PATCH] fix(TCPSocket): made read/write methods const

---
 src/eckit/net/TCPSocket.cc |  4 ++--
 src/eckit/net/TCPSocket.h  | 10 +++++-----
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/eckit/net/TCPSocket.cc b/src/eckit/net/TCPSocket.cc
index 8815fbbd7..7188f137c 100644
--- a/src/eckit/net/TCPSocket.cc
+++ b/src/eckit/net/TCPSocket.cc
@@ -116,7 +116,7 @@ void TCPSocket::closeInput() {
     SYSCALL(::shutdown(socket_, SHUT_RD));
 }
 
-long TCPSocket::write(const void* buf, long length) {
+long TCPSocket::write(const void* buf, long length) const {
 
     // Allow zero length packets
     if (length == 0) {
@@ -206,7 +206,7 @@ long TCPSocket::write(const void* buf, long length) {
     return sent;
 }
 
-long TCPSocket::read(void* buf, long length) {
+long TCPSocket::read(void* buf, long length) const {
     if (length <= 0) {
         return length;
     }
diff --git a/src/eckit/net/TCPSocket.h b/src/eckit/net/TCPSocket.h
index ec7b996af..bd08a194b 100644
--- a/src/eckit/net/TCPSocket.h
+++ b/src/eckit/net/TCPSocket.h
@@ -47,7 +47,7 @@ class TCPSocket {
 
     TCPSocket& operator=(net::TCPSocket&);
 
-    long write(const void* buf, long length);
+    long write(const void* buf, long length) const;
 
     /// Read from a TCP socket
     ///
@@ -59,7 +59,7 @@ class TCPSocket {
     ///   on flaky connections
     /// \arg **socketSelectTimeout** (*long*): timeout in seconds for the select
     ///   (only if **useSelectOnTCPSocket** is enabled)
-    long read(void* buf, long length);
+    long read(void* buf, long length) const;
 
     long rawRead(void*, long);  // Non-blocking version
 
@@ -121,9 +121,9 @@ class TCPSocket {
     int sendBufferSize_    = 0;
 
     // Debug
-    bool debug_;
-    bool newline_;
-    char mode_;
+    mutable bool debug_;
+    mutable bool newline_;
+    mutable char mode_;
 
 protected:  // methods
     int createSocket(int port, const SocketOptions& options);