From df28fd7ccfd1923dc49f94accc71a9b46a3bf88a Mon Sep 17 00:00:00 2001
From: "matthias.ringwald"
 <matthias.ringwald@1a0a8af8-31b5-11de-8e0c-53a27eea117e>
Date: Wed, 16 Sep 2009 21:37:32 +0000
Subject: [PATCH] added CFMessagePort IPC

---
 SpringBoardAccess/Makefile.in              | 24 +++++---
 SpringBoardAccess/SpringBoardAccess-test.c | 20 +++++++
 SpringBoardAccess/SpringBoardAccess.m      | 14 -----
 SpringBoardAccess/SpringBoardAccess.mm     | 66 ++++++++++++++++++++++
 4 files changed, 101 insertions(+), 23 deletions(-)
 create mode 100644 SpringBoardAccess/SpringBoardAccess-test.c
 delete mode 100644 SpringBoardAccess/SpringBoardAccess.m
 create mode 100644 SpringBoardAccess/SpringBoardAccess.mm

diff --git a/SpringBoardAccess/Makefile.in b/SpringBoardAccess/Makefile.in
index 60a065633..8bcab6214 100644
--- a/SpringBoardAccess/Makefile.in
+++ b/SpringBoardAccess/Makefile.in
@@ -1,20 +1,26 @@
 NAME = SpringBoardAccess
 
+CC = @CC@
 OBJC     = @OBJC@
 LDFLAGS  = @LDFLAGS@
 CPPFLAGS = @CPPFLAGS@
 
-LDFLAGS += -lobjc \
-		  -multiply_defined suppress \
-		  -framework CoreFoundation \
-		  -framework Foundation \
-		  -framework UIKit \
-		  -L../3rdparty -lsubstrate
+LIB_LDFLAGS = -lobjc \
+              -multiply_defined suppress \
+			  -framework CoreFoundation \
+			  -framework Foundation \
+			  -framework UIKit \
+			  -L../3rdparty -lsubstrate
 
-all: $(NAME).dylib
+APP_LDFLAGS = -framework CoreFoundation
+
+all: $(NAME).dylib $(NAME)-test
 
 clean:
 	rm -f $(NAME).dylib
 	
-$(NAME).dylib: $(NAME).m
-	$(OBJC) $(CPPFLAGS) -dynamiclib -o $@ $(NAME).m -init _$(NAME)Initialize $(LDFLAGS)
+$(NAME).dylib: $(NAME).mm
+	$(OBJC) $(CPPFLAGS) -dynamiclib -o $@ $(NAME).mm -init _$(NAME)Initialize $(LDFLAGS) $(LIB_LDFLAGS)
+
+$(NAME)-test: $(NAME)-test.c
+	$(OBJC) $(CPPFLAGS) -o $@ $(NAME)-test.c $(LDFLAGS) $(APP_LDFLAGS)
diff --git a/SpringBoardAccess/SpringBoardAccess-test.c b/SpringBoardAccess/SpringBoardAccess-test.c
new file mode 100644
index 000000000..0ce45e8d6
--- /dev/null
+++ b/SpringBoardAccess/SpringBoardAccess-test.c
@@ -0,0 +1,20 @@
+#import <CoreFoundation/CoreFoundation.h>
+
+main() {
+	CFMessagePortRef remote = CFMessagePortCreateRemote(NULL, CFSTR("SpringBoardAccess"));
+	if (!remote) {
+		printf("Failed to get remote port\n");
+		exit(10);
+	}
+	char *message = "Hello, world!";
+	CFDataRef data, returnData = NULL;
+	data = CFDataCreate(NULL, (const UInt8 *)message, strlen(message)+1);
+	if (kCFMessagePortSuccess == CFMessagePortSendRequest(remote, 0, data, 1, 1, kCFRunLoopDefaultMode, &returnData) && NULL != returnData) {
+		printf("here is our return data: %s\n", 
+			   CFDataGetBytePtr(returnData));
+		CFRelease(returnData);
+	}
+	CFRelease(data);
+	CFRelease(remote);
+}
+
diff --git a/SpringBoardAccess/SpringBoardAccess.m b/SpringBoardAccess/SpringBoardAccess.m
deleted file mode 100644
index 7b9f0f8a5..000000000
--- a/SpringBoardAccess/SpringBoardAccess.m
+++ /dev/null
@@ -1,14 +0,0 @@
-//
-//  SpringBoardAccess.m
-//
-//  Created by Matthias Ringwald on 9/15/09.
-//
-
-#import <Foundation/Foundation.h>
-#import <CoreFoundation/CoreFoundation.h>
-
-#import "../3rdparty/substrate.h"
-
-void SpringBoardAccessInitialize(){
-	NSLog(@"SpringBoardAccessInitialize called!");
-}
diff --git a/SpringBoardAccess/SpringBoardAccess.mm b/SpringBoardAccess/SpringBoardAccess.mm
new file mode 100644
index 000000000..190e3bae9
--- /dev/null
+++ b/SpringBoardAccess/SpringBoardAccess.mm
@@ -0,0 +1,66 @@
+//
+//  SpringBoardAccess.m
+//
+//  Created by Matthias Ringwald on 9/15/09.
+//
+
+#import <Foundation/Foundation.h>
+#import <CoreFoundation/CoreFoundation.h>
+
+#import "../3rdparty/substrate.h"
+#import "../3rdparty/SpringBoard.h"
+
+#define HOOK(class, name, type, args...) \
+static type (*_ ## class ## $ ## name)(class *self, SEL sel, ## args); \
+static type $ ## class ## $ ## name(class *self, SEL sel, ## args)
+
+#define CALL_ORIG(class, name, args...) \
+_ ## class ## $ ## name(self, sel, ## args)
+
+
+CFDataRef myCallBack(CFMessagePortRef local, SInt32 msgid, CFDataRef data, void *info) {
+	NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+
+	
+	
+	char *message = "Thanks for calling!";
+	CFDataRef returnData = CFDataCreate(NULL, (const UInt8 *) message, strlen(message)+1);
+	NSLog(@"here is our received data: %s\n", CFDataGetBytePtr(data));
+	
+	[pool release]; 
+
+	return returnData;  // as stated in header, both data and returnData will be released for us after callback returns
+}
+
+//______________________________________________________________________________
+
+HOOK(SpringBoard, applicationDidFinishLaunching$, void, id app) {
+	NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+
+    CALL_ORIG(SpringBoard, applicationDidFinishLaunching$, app);
+	
+	CFMessagePortRef local = CFMessagePortCreateLocal(NULL, CFSTR("SpringBoardAccess"), myCallBack, NULL, false);
+	CFRunLoopSourceRef source = CFMessagePortCreateRunLoopSource(NULL, local, 0);
+	CFRunLoopAddSource(CFRunLoopGetCurrent(), source, kCFRunLoopDefaultMode);
+	
+    [pool release]; 
+}
+//______________________________________________________________________________
+
+extern "C" void SpringBoardAccessInitialize(){
+	NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+	
+    // NOTE: This library should only be loaded for SpringBoard
+    NSString *identifier = [[NSBundle mainBundle] bundleIdentifier];
+    if (![identifier isEqualToString:@"com.apple.springboard"])
+        return;
+
+	NSLog(@"SpringBoardAccessInitialize called for SpringBoard!");
+	
+    // Setup hooks
+    Class $SpringBoard(objc_getClass("SpringBoard"));
+    _SpringBoard$applicationDidFinishLaunching$ =
+	MSHookMessage($SpringBoard, @selector(applicationDidFinishLaunching:), &$SpringBoard$applicationDidFinishLaunching$);
+
+    [pool release]; 
+}