Initial commit (yes, this is bad code)

.gitignore

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+build/
+.vscode/
+CECTool*

Makefile

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+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+TOPDIR ?= $(CURDIR)
+include $(DEVKITARM)/3ds_rules
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# DATA is a list of directories containing data files
+# INCLUDES is a list of directories containing header files
+# GRAPHICS is a list of directories containing graphics files
+# GFXBUILD is the directory where converted graphics files will be placed
+#   If set to $(BUILD), it will statically link in the converted
+#   files as if they were data files.
+#
+# NO_SMDH: if set to anything, no SMDH file is generated.
+# ROMFS is the directory which contains the RomFS, relative to the Makefile (Optional)
+# APP_TITLE is the name of the app stored in the SMDH file (Optional)
+# APP_DESCRIPTION is the description of the app stored in the SMDH file (Optional)
+# APP_AUTHOR is the author of the app stored in the SMDH file (Optional)
+# ICON is the filename of the icon (.png), relative to the project folder.
+#   If not set, it attempts to use one of the following (in this order):
+#     - <Project name>.png
+#     - icon.png
+#     - <libctru folder>/default_icon.png
+#---------------------------------------------------------------------------------
+TARGET		:=	$(notdir $(CURDIR))
+BUILD		:=	build
+SOURCES		:=	source
+DATA		:=	data
+INCLUDES	:=	include
+GRAPHICS	:=	gfx
+GFXBUILD	:=	$(BUILD)
+#ROMFS		:=	romfs
+#GFXBUILD	:=	$(ROMFS)/gfx
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft
+
+CFLAGS	:=	-g -Wall -O2 -mword-relocations \
+			-fomit-frame-pointer -ffunction-sections \
+			$(ARCH)
+
+CFLAGS	+=	$(INCLUDE) -DARM11 -D_3DS
+
+CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11
+
+ASFLAGS	:=	-g $(ARCH)
+LDFLAGS	=	-specs=3dsx.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
+
+LIBS	:= -lctru -lm
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:= $(CTRULIB)
+
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+export TOPDIR	:=	$(CURDIR)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(GRAPHICS),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+PICAFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.v.pica)))
+SHLISTFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.shlist)))
+GFXFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.t3s)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CC)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CXX)
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+#---------------------------------------------------------------------------------
+ifeq ($(GFXBUILD),$(BUILD))
+#---------------------------------------------------------------------------------
+export T3XFILES :=  $(GFXFILES:.t3s=.t3x)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+export ROMFS_T3XFILES	:=	$(patsubst %.t3s, $(GFXBUILD)/%.t3x, $(GFXFILES))
+export T3XHFILES		:=	$(patsubst %.t3s, $(BUILD)/%.h, $(GFXFILES))
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+export OFILES_SOURCES 	:=	$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+
+export OFILES_BIN	:=	$(addsuffix .o,$(BINFILES)) \
+			$(PICAFILES:.v.pica=.shbin.o) $(SHLISTFILES:.shlist=.shbin.o) \
+			$(addsuffix .o,$(T3XFILES))
+
+export OFILES := $(OFILES_BIN) $(OFILES_SOURCES)
+
+export HFILES	:=	$(PICAFILES:.v.pica=_shbin.h) $(SHLISTFILES:.shlist=_shbin.h) \
+			$(addsuffix .h,$(subst .,_,$(BINFILES))) \
+			$(GFXFILES:.t3s=.h)
+
+export INCLUDE	:=	$(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
+			$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+			-I$(CURDIR)/$(BUILD)
+
+export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+export _3DSXDEPS	:=	$(if $(NO_SMDH),,$(OUTPUT).smdh)
+
+ifeq ($(strip $(ICON)),)
+	icons := $(wildcard *.png)
+	ifneq (,$(findstring $(TARGET).png,$(icons)))
+		export APP_ICON := $(TOPDIR)/$(TARGET).png
+	else
+		ifneq (,$(findstring icon.png,$(icons)))
+			export APP_ICON := $(TOPDIR)/icon.png
+		endif
+	endif
+else
+	export APP_ICON := $(TOPDIR)/$(ICON)
+endif
+
+ifeq ($(strip $(NO_SMDH)),)
+	export _3DSXFLAGS += --smdh=$(CURDIR)/$(TARGET).smdh
+endif
+
+ifneq ($(ROMFS),)
+	export _3DSXFLAGS += --romfs=$(CURDIR)/$(ROMFS)
+endif
+
+.PHONY: all clean
+
+#---------------------------------------------------------------------------------
+all: $(BUILD) $(GFXBUILD) $(DEPSDIR) $(ROMFS_T3XFILES) $(T3XHFILES)
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+$(BUILD):
+	@mkdir -p $@
+
+ifneq ($(GFXBUILD),$(BUILD))
+$(GFXBUILD):
+	@mkdir -p $@
+endif
+
+ifneq ($(DEPSDIR),$(BUILD))
+$(DEPSDIR):
+	@mkdir -p $@
+endif
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).3dsx $(OUTPUT).smdh $(TARGET).elf $(GFXBUILD)
+
+#---------------------------------------------------------------------------------
+$(GFXBUILD)/%.t3x	$(BUILD)/%.h	:	%.t3s
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@tex3ds -i $< -H $(BUILD)/$*.h -d $(DEPSDIR)/$*.d -o $(GFXBUILD)/$*.t3x
+
+#---------------------------------------------------------------------------------
+else
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+$(OUTPUT).3dsx	:	$(OUTPUT).elf $(_3DSXDEPS)
+
+$(OFILES_SOURCES) : $(HFILES)
+
+$(OUTPUT).elf	:	$(OFILES)
+
+#---------------------------------------------------------------------------------
+# you need a rule like this for each extension you use as binary data
+#---------------------------------------------------------------------------------
+%.bin.o	%_bin.h :	%.bin
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@$(bin2o)
+
+#---------------------------------------------------------------------------------
+.PRECIOUS	:	%.t3x
+#---------------------------------------------------------------------------------
+%.t3x.o	%_t3x.h :	%.t3x
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@$(bin2o)
+
+#---------------------------------------------------------------------------------
+# rules for assembling GPU shaders
+#---------------------------------------------------------------------------------
+define shader-as
+	$(eval CURBIN := $*.shbin)
+	$(eval DEPSFILE := $(DEPSDIR)/$*.shbin.d)
+	echo "$(CURBIN).o: $< $1" > $(DEPSFILE)
+	echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(CURBIN) | tr . _)`.h
+	echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(CURBIN) | tr . _)`.h
+	echo "extern const u32" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(CURBIN) | tr . _)`.h
+	picasso -o $(CURBIN) $1
+	bin2s $(CURBIN) | $(AS) -o $*.shbin.o
+endef
+
+%.shbin.o %_shbin.h : %.v.pica %.g.pica
+	@echo $(notdir $^)
+	@$(call shader-as,$^)
+
+%.shbin.o %_shbin.h : %.v.pica
+	@echo $(notdir $<)
+	@$(call shader-as,$<)
+
+%.shbin.o %_shbin.h : %.shlist
+	@echo $(notdir $<)
+	@$(call shader-as,$(foreach file,$(shell cat $<),$(dir $<)$(file)))
+
+#---------------------------------------------------------------------------------
+%.t3x	%.h	:	%.t3s
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@tex3ds -i $< -H $*.h -d $*.d -o $*.t3x
+
+-include $(DEPSDIR)/*.d
+
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

README.md

@@ -1,2 +1,4 @@
 # CECTool
 A POC CEC (StreetPass) injection tool.
+
+Information for implemenation of CECD:U service taken from [here](https://www.3dbrew.org/wiki/CECD_Services) and [here](https://gist.github.com/wwylele/29a8caa6f5e5a7d88a00bedae90472ed)

include/Box.hpp

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+#include "BoxInfo.hpp"
+#include <stdio.h>
+extern "C"
+{
+#include "cecdu.h"
+}
+
+class Box
+{
+private:
+    BoxInfo* info;
+    std::vector<cecMessageId> messages;
+public:
+    Box(u32 id)
+    {
+        Result res;
+        u8* in = new u8[32];
+        std::fill_n(in, 32, '\0');
+        size_t readSize = 32;
+        res = CECDU_OpenAndRead(id, CEC_PATH_INBOX_INFO, CEC_READ | CEC_WRITE | CEC_SKIP_CHECKS, in, &readSize);
+        if (R_FAILED(res)) printf("Read info 1\n%X", res);
+        info = new BoxInfo(in, false);
+        if (info->currentMessages() > 0)
+        {
+            delete[] in;
+            in = new u8[readSize = info->fileSize()];
+            res = CECDU_OpenAndRead(id, CEC_PATH_INBOX_INFO, CEC_READ | CEC_WRITE | CEC_SKIP_CHECKS, in, &readSize);
+            if (R_FAILED(res)) printf("Read info 2\n%X", res);
+            delete info;
+            info = new BoxInfo(in);
+        }
+        for (auto message : info->getMessages())
+        {
+            cecMessageId id;
+            std::copy(message.messageID(), message.messageID() + 8, (u8*)&id);
+            messages.push_back(id);
+        }
+    }
+
+    std::string messageNames() const
+    {
+        std::string ret;
+        for (auto message : messages)
+        {
+            ret.append(message.data, message.data + 8).append("\n");
+        }
+        return ret;
+    }
+};

include/BoxInfo.hpp

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+#ifndef BOXINFO_HPP
+#define BOXINFO_HPP
+
+#include <3ds.h>
+#include <vector>
+#include "Message.hpp"
+class BoxInfo
+{
+private:
+    u8 info[0x20];
+    std::vector<MessageInfo> messages;
+public:
+    BoxInfo(u8* data, bool cont = true)
+    {
+        std::copy(data, data + 0x20, info);
+        if (cont)
+        {
+            for (size_t i = 0x20; i < fileSize(); i += 0x70)
+            {
+                messages.push_back({data + i});
+            }
+        }
+    }
+
+    u32 fileSize() const { return *(u32*)(info + 0x4); }
+    void fileSize(u32 v) { *(u32*)(info + 0x4) = v; }
+    u32 maxBoxSize() const { return *(u32*)(info + 0x8); }
+    u32 currentBoxSize() const { return *(u32*)(info + 0xC); }
+    void currentBoxSize(u32 v) { *(u32*)(info + 0xC) = v; }
+    u32 maxMessages() const { return *(u32*)(info + 0x10); }
+    u32 currentMessages() const { return *(u32*)(info + 0x14); }
+    void currentMessages(u32 v) { *(u32*)(info + 0x14) = v; }
+    u32 maxBatchSize() const { return *(u32*)(info + 0x18); }
+    u32 maxMessageSize() const { return *(u32*)(info + 0x1C); }
+    void addMessage(MessageInfo& message)
+    {
+        if (message.messageSize() + currentBoxSize() + 0x70 > maxBoxSize())
+        {
+            return;
+        }
+        currentBoxSize(currentBoxSize() + message.messageSize() + 0x70);
+        messages.push_back(message);
+        fileSize(fileSize() + 0x70);
+        currentMessages(currentMessages() + 1);
+    }
+    void addMessage(Message& message)
+    {
+        addMessage(const_cast<MessageInfo&>(message.getInfo()));
+    }
+    std::vector<u8> data() const
+    {
+        std::vector<u8> ret(fileSize());
+        ret.insert(ret.end(), info, info + 0x20);
+        for (auto message : messages)
+        {
+            ret.insert(ret.end(), message.data(), message.data() + 0x70);
+        }
+
+        return ret;
+    }
+    const std::vector<MessageInfo>& getMessages() const
+    {
+        return messages;
+    }
+};
+#endif