ext/sockets: adding Linux's TCP_USER_TIMEOUT constant.

lucasnetau · lucasnetau · commit d87015f3ca6d · 2025-12-15T21:23:44.000+11:00
diff --git a/NEWS b/NEWS
@@ -56,6 +56,10 @@ PHP                                                                        NEWS
   . Soap::__setCookie() when cookie name is a digit is now not stored and represented
     as a string anymore but a int. (David Carlier)
 
+- Sockets:
+  . Added the TCP_USER_TIMEOUT constant for Linux to set the maximum time in milliseconds
+        transmitted data can remain unacknowledged. (James Lucas)
+
 - SPL:
   . DirectoryIterator key can now work better with filesystem supporting larger
     directory indexing. (David Carlier)
diff --git a/UPGRADING b/UPGRADING
@@ -90,6 +90,9 @@ PHP 8.6 UPGRADE NOTES
 10. New Global Constants
 ========================================
 
+- Sockets:
+  . TCP_USER_TIMEOUT (Linux only).
+
 ========================================
 11. Changes to INI File Handling
 ========================================
diff --git a/ext/sockets/sockets.stub.php b/ext/sockets/sockets.stub.php
@@ -602,6 +602,13 @@
  */
 const TCP_SYNCNT = UNKNOWN;
 #endif
+#ifdef TCP_USER_TIMEOUT
+/**
+ * @var int
+ * @cvalue TCP_USER_TIMEOUT
+ */
+const TCP_USER_TIMEOUT = UNKNOWN;
+#endif
 #ifdef SO_ZEROCOPY
 /**
  * @var int
diff --git a/ext/sockets/sockets_arginfo.h b/ext/sockets/sockets_arginfo.h
