Manually respond to remote side of socket closing read stream

Classes/Headers/IRCConnection.h

@@ -65,6 +65,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)ircConnectionDidConnect:(IRCConnection *)sender;
 - (void)ircConnection:(IRCConnection *)sender willConnectToProxy:(NSString *)proxyHost port:(uint16_t)proxyPort;
 - (void)ircConnection:(IRCConnection *)sender didDisconnectWithError:(nullable NSError *)disconnectError;
+- (void)ircConnectionDidCloseReadStream:(IRCConnection *)sender;
 - (void)ircConnection:(IRCConnection *)sender didError:(NSString *)error;
 - (void)ircConnection:(IRCConnection *)sender didReceiveData:(NSString *)data;
 - (void)ircConnection:(IRCConnection *)sender willSendData:(NSString *)data;

Classes/Headers/Private/IRCConnectionPrivate.h

@@ -45,6 +45,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)tpcClientWillConnectToProxy:(NSString *)proxyHost port:(uint16_t)proxyPort;
 - (void)tcpClientDidError:(NSString *)error;
 - (void)tcpClientDidDisconnect:(nullable NSError *)disconnectError;
+- (void)tcpClientDidCloseReadStream;
 - (void)tcpClientDidReceiveData:(NSString *)data;
 - (void)tcpClientDidSecureConnection;
 - (void)tcpClientDidReceivedAnInsecureCertificate;

Classes/IRC/IRCClient.m

@@ -4558,6 +4558,19 @@ - (void)ircConnection:(IRCConnection *)sender didError:(NSString *)error
 	[self printError:error asCommand:TVCLogLineDefaultCommandValue];
 }
 
+- (void)ircConnectionDidCloseReadStream:(IRCConnection *)sender
+{
+	NSParameterAssert(sender == self.socket);
+
+	if (self.isTerminating) {
+		return;
+	}
+
+	[self printDebugInformationToConsole:TXTLS(@"IRC[1120]")];
+
+	[self disconnect];
+}
+
 - (void)ircConnection:(IRCConnection *)sender didReceiveData:(NSString *)data
 {
 	NSParameterAssert(sender == self.socket);

Classes/IRC/IRCConnection.m

@@ -268,6 +268,11 @@ - (void)tcpClientDidDisconnect:(nullable NSError *)disconnectError
 	[self.client ircConnection:self didDisconnectWithError:disconnectError];
 }
 
+- (void)tcpClientDidCloseReadStream
+{
+	[self.client ircConnectionDidCloseReadStream:self];
+}
+
 - (void)tcpClientDidReceiveData:(NSString *)data
 {
 	[self.client ircConnection:self didReceiveData:data];

Classes/IRC/IRCConnectionSocket.m

@@ -112,6 +112,8 @@ - (void)openSocket
 												 delegateQueue:self.dispatchQueue
 												   socketQueue:self.socketQueue];
 
+	self.socketConnection.autoDisconnectOnClosedReadStream = NO;
+
 	self.socketConnection.IPv4PreferredOverIPv6 = self.config.connectionPrefersIPv4;
 
 	/* Attempt to connect using a configured proxy */
@@ -358,6 +360,11 @@ - (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(ui
 	[self onSocketConnectedToHost];
 }
 
+- (void)socketDidCloseReadStream:(GCDAsyncSocket *)sock
+{
+	[self tcpClientDidCloseReadStream];
+}
+
 - (void)_socketDidDisconnect:(GCDAsyncSocket *)sock withError:(nullable NSError *)error
 {
 	[self closeSocket];

Resources/Language Files/English.lproj/IRC.strings

@@ -35,7 +35,7 @@
 
  *********************************************************************** */
 
-/* Next unusued key: 1120 */
+/* Next unusued key: 1121 */
 
 /* Script errors */
 "IRC[1001]" = "Error: The command %@ is defined by a plugin and a script. Sending to server because of inability to determine priority.";
@@ -169,6 +169,7 @@
 "IRC[1088]" = "You cannot send private messages to %@. Anything that you send to them will be ignored until you are added to their list of recognized users.";
 "IRC[1089]" = "%1$@ (%2$@) tried to send you a private message, but it was ignored due to \002umode +g\002. Perform “/accept %1$@” to allow this user to communicate with you.";
 "IRC[1114]" = "Reconnecting to proxy to rebuild internal state…"; // irssi proxy
+"IRC[1120]" = "Server closed read stream";
 
 /* /timer/ command */
 "IRC[1090]" = "Timer command requires a whole number for interval. Syntax: “/timer <seconds> <command>”";