Network iOS xcode27.0 b3

#Network.framework

diff -ruN /Applications/Xcode_27.0.0-beta2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/nw_object.h /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/nw_object.h
--- /Applications/Xcode_27.0.0-beta2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/nw_object.h	2026-06-16 03:22:32
+++ /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/nw_object.h	2026-06-27 03:19:58
@@ -138,6 +138,10 @@
 #endif // __OBJC__ && objc_arc && objc_externally_retained
 #endif // !NW_EXTERNALLY_RETAINED
 
+#ifndef NW_EXPORT
+#  define NW_EXPORT __attribute__((visibility("default")))
+#endif // !NW_EXPORT
+
 #ifndef NW_EXPORT_PROJECT
 #  define NW_EXPORT_PROJECT __attribute__((visibility("default")))
 #endif // !NW_EXPORT_PROJECT
diff -ruN /Applications/Xcode_27.0.0-beta2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/tcp_options.h /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/tcp_options.h
--- /Applications/Xcode_27.0.0-beta2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/tcp_options.h	2026-06-18 00:07:37
+++ /Applications/Xcode_27.0.0-beta3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/System/Library/Frameworks/Network.framework/Headers/tcp_options.h	2026-06-27 03:07:50
@@ -414,23 +414,40 @@
  * @function nw_tcp_set_max_pacing_rate
  *
  * @abstract
- *		Set the maximum pacing rate for TCP transmission in bytes per second.
- *		TCP pacing spreads out packet transmission to avoid bursts and reduce
- *		network congestion. The actual pacing rate used will be the minimum
- *		of this value and the rate computed from cwnd/RTT.
+ *		Set a maximum pacing rate for a TCP connection, in bytes per second.
  *
- *		A value of 0 or UINT64_MAX means unlimited (disables pacing).
+ * @discussion
+ *		TCP pacing spreads outgoing packet transmission across time to avoid
+ *		bursts and reduce queueing in the network. With a cap in place, the
+ *		on-wire rate is the minimum of (a) this cap, and (b) the rate computed
+ *		from the congestion window divided by smoothed RTT. The cap therefore
+ *		never raises throughput above what congestion control would otherwise
+ *		allow.
  *
+ *		A value of 0 or UINT64_MAX disables pacing on this connection — the
+ *		connection sends without pacing (subject only to congestion control).
+ *
+ *		Rates in the open interval (0, 12500) are silently clamped up to
+ *		12500 bytes/second (100 Kbps). Callers needing genuinely sub-100-Kbps
+ *		pacing must shape at the application layer.
+ *
+ *		The cap may be updated at any time during the lifetime of an
+ *		established connection. Each call replaces the prior value.
+ *
  * @param metadata
- *		A TCP protocol metadata object from an established connection.
+ *		A TCP protocol metadata object from an established connection
+ *		(e.g. obtained via nw_connection_access_established_protocol_metadata).
  *
  * @param max_pacing_rate
- *		Maximum pacing rate in bytes per second.
+ *		Maximum pacing rate in bytes per second. 0 or UINT64_MAX disables
+ *		pacing on this connection.
  *
  * @result
- *		Returns 0 on success, or an error code on failure.
+ *		Returns 0 on success, or a POSIX errno value on failure (e.g. EINVAL
+ *		if metadata is not a TCP metadata object, or the underlying socket
+ *		error).
  */
-API_AVAILABLE(macos(27.0), ios(27.0), watchos(27.0), tvos(27.0), visionos(27.0))
+NW_EXPORT API_AVAILABLE(anyappleos(27.0))
 int
 nw_tcp_set_max_pacing_rate(nw_protocol_metadata_t metadata,
 						   uint64_t max_pacing_rate);