├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── assets └── icon.png └── source └── main.c /.gitignore: -------------------------------------------------------------------------------- 1 | build/ 2 | *.3dsx 3 | *.smdh 4 | *.elf 5 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | #--------------------------------------------------------------------------------- 2 | .SUFFIXES: 3 | #--------------------------------------------------------------------------------- 4 | 5 | ifeq ($(strip $(DEVKITARM)),) 6 | $(error "Please set DEVKITARM in your environment. export DEVKITARM=devkitARM") 7 | endif 8 | 9 | TOPDIR ?= $(CURDIR) 10 | include $(DEVKITARM)/3ds_rules 11 | 12 | #--------------------------------------------------------------------------------- 13 | # TARGET is the name of the output 14 | # BUILD is the directory where object files & intermediate files will be placed 15 | # SOURCES is a list of directories containing source code 16 | # DATA is a list of directories containing data files 17 | # INCLUDES is a list of directories containing header files 18 | # GRAPHICS is a list of directories containing graphics files 19 | # GFXBUILD is the directory where converted graphics files will be placed 20 | # If set to $(BUILD), it will statically link in the converted 21 | # files as if they were data files. 22 | # 23 | # NO_SMDH: if set to anything, no SMDH file is generated. 24 | # ROMFS is the directory which contains the RomFS, relative to the Makefile (Optional) 25 | # APP_TITLE is the name of the app stored in the SMDH file (Optional) 26 | # APP_DESCRIPTION is the description of the app stored in the SMDH file (Optional) 27 | # APP_AUTHOR is the author of the app stored in the SMDH file (Optional) 28 | # ICON is the filename of the icon (.png), relative to the project folder. 29 | # If not set, it attempts to use one of the following (in this order): 30 | # - .png 31 | # - icon.png 32 | # - /default_icon.png 33 | #--------------------------------------------------------------------------------- 34 | TARGET := $(notdir $(CURDIR)) 35 | BUILD := build 36 | SOURCES := source 37 | DATA := data 38 | INCLUDES := include 39 | GRAPHICS := gfx 40 | GFXBUILD := $(BUILD) 41 | #ROMFS := romfs 42 | #GFXBUILD := $(ROMFS)/gfx 43 | APP_TITLE := GBA Net Boot 44 | APP_DESCRIPTION := Boot GBA ROMs over wifi via open_agb_firm 45 | APP_AUTHOR := gamefreakfatty 46 | ICON := assets/icon.png 47 | 48 | #--------------------------------------------------------------------------------- 49 | # options for code generation 50 | #--------------------------------------------------------------------------------- 51 | ARCH := -march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft 52 | 53 | CFLAGS := -g -Wall -O2 -mword-relocations \ 54 | -ffunction-sections \ 55 | $(ARCH) 56 | 57 | CFLAGS += $(INCLUDE) -D__3DS__ 58 | 59 | CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11 60 | 61 | ASFLAGS := -g $(ARCH) 62 | LDFLAGS = -specs=3dsx.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map) 63 | 64 | LIBS := -lctru -lm 65 | 66 | #--------------------------------------------------------------------------------- 67 | # list of directories containing libraries, this must be the top level containing 68 | # include and lib 69 | #--------------------------------------------------------------------------------- 70 | LIBDIRS := $(CTRULIB) 71 | 72 | 73 | #--------------------------------------------------------------------------------- 74 | # no real need to edit anything past this point unless you need to add additional 75 | # rules for different file extensions 76 | #--------------------------------------------------------------------------------- 77 | ifneq ($(BUILD),$(notdir $(CURDIR))) 78 | #--------------------------------------------------------------------------------- 79 | 80 | export OUTPUT := $(CURDIR)/$(TARGET) 81 | export TOPDIR := $(CURDIR) 82 | 83 | export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \ 84 | $(foreach dir,$(GRAPHICS),$(CURDIR)/$(dir)) \ 85 | $(foreach dir,$(DATA),$(CURDIR)/$(dir)) 86 | 87 | export DEPSDIR := $(CURDIR)/$(BUILD) 88 | 89 | CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) 90 | CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp))) 91 | SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s))) 92 | PICAFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.v.pica))) 93 | SHLISTFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.shlist))) 94 | GFXFILES := $(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.t3s))) 95 | BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) 96 | 97 | #--------------------------------------------------------------------------------- 98 | # use CXX for linking C++ projects, CC for standard C 99 | #--------------------------------------------------------------------------------- 100 | ifeq ($(strip $(CPPFILES)),) 101 | #--------------------------------------------------------------------------------- 102 | export LD := $(CC) 103 | #--------------------------------------------------------------------------------- 104 | else 105 | #--------------------------------------------------------------------------------- 106 | export LD := $(CXX) 107 | #--------------------------------------------------------------------------------- 108 | endif 109 | #--------------------------------------------------------------------------------- 110 | 111 | #--------------------------------------------------------------------------------- 112 | ifeq ($(GFXBUILD),$(BUILD)) 113 | #--------------------------------------------------------------------------------- 114 | export T3XFILES := $(GFXFILES:.t3s=.t3x) 115 | #--------------------------------------------------------------------------------- 116 | else 117 | #--------------------------------------------------------------------------------- 118 | export ROMFS_T3XFILES := $(patsubst %.t3s, $(GFXBUILD)/%.t3x, $(GFXFILES)) 119 | export T3XHFILES := $(patsubst %.t3s, $(BUILD)/%.h, $(GFXFILES)) 120 | #--------------------------------------------------------------------------------- 121 | endif 122 | #--------------------------------------------------------------------------------- 123 | 124 | export OFILES_SOURCES := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o) 125 | 126 | export OFILES_BIN := $(addsuffix .o,$(BINFILES)) \ 127 | $(PICAFILES:.v.pica=.shbin.o) $(SHLISTFILES:.shlist=.shbin.o) \ 128 | $(addsuffix .o,$(T3XFILES)) 129 | 130 | export OFILES := $(OFILES_BIN) $(OFILES_SOURCES) 131 | 132 | export HFILES := $(PICAFILES:.v.pica=_shbin.h) $(SHLISTFILES:.shlist=_shbin.h) \ 133 | $(addsuffix .h,$(subst .,_,$(BINFILES))) \ 134 | $(GFXFILES:.t3s=.h) 135 | 136 | export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \ 137 | $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ 138 | -I$(CURDIR)/$(BUILD) 139 | 140 | export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib) 141 | 142 | export _3DSXDEPS := $(if $(NO_SMDH),,$(OUTPUT).smdh) 143 | 144 | ifeq ($(strip $(ICON)),) 145 | icons := $(wildcard *.png) 146 | ifneq (,$(findstring $(TARGET).png,$(icons))) 147 | export APP_ICON := $(TOPDIR)/$(TARGET).png 148 | else 149 | ifneq (,$(findstring icon.png,$(icons))) 150 | export APP_ICON := $(TOPDIR)/icon.png 151 | endif 152 | endif 153 | else 154 | export APP_ICON := $(TOPDIR)/$(ICON) 155 | endif 156 | 157 | ifeq ($(strip $(NO_SMDH)),) 158 | export _3DSXFLAGS += --smdh=$(CURDIR)/$(TARGET).smdh 159 | endif 160 | 161 | ifneq ($(ROMFS),) 162 | export _3DSXFLAGS += --romfs=$(CURDIR)/$(ROMFS) 163 | endif 164 | 165 | .PHONY: all clean 166 | 167 | #--------------------------------------------------------------------------------- 168 | all: $(BUILD) $(GFXBUILD) $(DEPSDIR) $(ROMFS_T3XFILES) $(T3XHFILES) 169 | @$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile 170 | 171 | $(BUILD): 172 | @mkdir -p $@ 173 | 174 | ifneq ($(GFXBUILD),$(BUILD)) 175 | $(GFXBUILD): 176 | @mkdir -p $@ 177 | endif 178 | 179 | ifneq ($(DEPSDIR),$(BUILD)) 180 | $(DEPSDIR): 181 | @mkdir -p $@ 182 | endif 183 | 184 | #--------------------------------------------------------------------------------- 185 | clean: 186 | @echo clean ... 187 | @rm -fr $(BUILD) $(TARGET).3dsx $(OUTPUT).smdh $(TARGET).elf $(GFXBUILD) 188 | 189 | #--------------------------------------------------------------------------------- 190 | $(GFXBUILD)/%.t3x $(BUILD)/%.h : %.t3s 191 | #--------------------------------------------------------------------------------- 192 | @echo $(notdir $<) 193 | @tex3ds -i $< -H $(BUILD)/$*.h -d $(DEPSDIR)/$*.d -o $(GFXBUILD)/$*.t3x 194 | 195 | #--------------------------------------------------------------------------------- 196 | else 197 | 198 | #--------------------------------------------------------------------------------- 199 | # main targets 200 | #--------------------------------------------------------------------------------- 201 | $(OUTPUT).3dsx : $(OUTPUT).elf $(_3DSXDEPS) 202 | 203 | $(OFILES_SOURCES) : $(HFILES) 204 | 205 | $(OUTPUT).elf : $(OFILES) 206 | 207 | #--------------------------------------------------------------------------------- 208 | # you need a rule like this for each extension you use as binary data 209 | #--------------------------------------------------------------------------------- 210 | %.bin.o %_bin.h : %.bin 211 | #--------------------------------------------------------------------------------- 212 | @echo $(notdir $<) 213 | @$(bin2o) 214 | 215 | #--------------------------------------------------------------------------------- 216 | .PRECIOUS : %.t3x 217 | #--------------------------------------------------------------------------------- 218 | %.t3x.o %_t3x.h : %.t3x 219 | #--------------------------------------------------------------------------------- 220 | @echo $(notdir $<) 221 | @$(bin2o) 222 | 223 | #--------------------------------------------------------------------------------- 224 | # rules for assembling GPU shaders 225 | #--------------------------------------------------------------------------------- 226 | define shader-as 227 | $(eval CURBIN := $*.shbin) 228 | $(eval DEPSFILE := $(DEPSDIR)/$*.shbin.d) 229 | echo "$(CURBIN).o: $< $1" > $(DEPSFILE) 230 | echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(CURBIN) | tr . _)`.h 231 | echo "extern const u8" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(CURBIN) | tr . _)`.h 232 | echo "extern const u32" `(echo $(CURBIN) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(CURBIN) | tr . _)`.h 233 | picasso -o $(CURBIN) $1 234 | bin2s $(CURBIN) | $(AS) -o $*.shbin.o 235 | endef 236 | 237 | %.shbin.o %_shbin.h : %.v.pica %.g.pica 238 | @echo $(notdir $^) 239 | @$(call shader-as,$^) 240 | 241 | %.shbin.o %_shbin.h : %.v.pica 242 | @echo $(notdir $<) 243 | @$(call shader-as,$<) 244 | 245 | %.shbin.o %_shbin.h : %.shlist 246 | @echo $(notdir $<) 247 | @$(call shader-as,$(foreach file,$(shell cat $<),$(dir $<)$(file))) 248 | 249 | #--------------------------------------------------------------------------------- 250 | %.t3x %.h : %.t3s 251 | #--------------------------------------------------------------------------------- 252 | @echo $(notdir $<) 253 | @tex3ds -i $< -H $*.h -d $*.d -o $*.t3x 254 | 255 | -include $(DEPSDIR)/*.d 256 | 257 | #--------------------------------------------------------------------------------------- 258 | endif 259 | #--------------------------------------------------------------------------------------- 260 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # GBA Net Boot 2 | *A tool for testing GBA homebrew on real hardware using the 3DS's built-in GBA hardware* 3 | 4 | GBA Net Boot is a tool for wirelessly receiving and booting GBA homebrew on your 3DS using its built-in GBA hardware. Using [GBA Net Send](https://github.com/joshbackstein/gba-net-send), you can send GBA homebrew ROMs from your computer to your 3DS over a wifi network. GBA Net Boot will receive your ROM, store it to the SD card, and boot into open_agb_firm for you to run your ROM in native GBA mode on your 3DS. This is meant to make testing GBA homebrew on official hardware as seamless and painless as possible. 5 | 6 | ## Disclaimer 7 | This software has been tested many times without any issues. The software it depends on has also been tested many times. However, there is always a risk something might cause damage to your system or cause corruption or loss of data. Multiple parts of this process deal with lower levels of the system, especially the custom firmware and bootloader. I am not responsible for any damage to or destruction of your system, your data, or anything else. 8 | 9 | ## How to use 10 | First, make sure you have gone through the setup. 11 | 12 | Make sure you have wifi enabled and connected on your 3DS, then launch gba-net-boot. If wifi hasn't been set up yet, gba-net-boot will wait for your 3DS to connect to wifi. 13 | 14 | After your 3DS is connected to wifi, gba-net-boot will wait for you to use the gba-net-send tool to send your ROM to your 3DS over the network. Your ROM will be saved to the root of your SD card as `rom.gba`. 15 | 16 | When the transfer has completed and your ROM is saved to your SD card, gba-net-boot will automatically boot into open_agb_firm. From here, you can navigate to `rom.gba` on the root of your SD card and press `A` to launch it. 17 | 18 | ## Setup 19 | First, install the [Luma3DS](https://github.com/LumaTeam/Luma3DS/) custom firmware using this [guide](https://3ds.hacks.guide/). The guide should help you install both Luma3DS and [Boot9strap](https://github.com/SciresM/boot9strap/). 20 | 21 | Next, install [fastboot3DS](https://github.com/derrekr/fastboot3DS#quick-start-guide) using [OpenFirmInstaller](https://github.com/d0k3/OpenFirmInstaller). 22 | 23 | After you have installed fastboot3DS, turn off your 3DS, then turn it back on while holding the `Home` button. This should show you the fastboot3DS splash screen and bring you to its menu. Looking at the bottom screen, go down to `Boot setup` and press `A`, then go down to `Enable FCRAM Boot` and press `A` to enable it. If done correctly, you should see a check mark next to that option. Now press `B`, then go up to `Continue boot` and press `A`. 24 | 25 | Optional: By default, fastboot3DS assigns the `Start` button on boot to load [GodMode9](https://github.com/d0k3/GodMode9). If you want to disable this and use the default Luma3DS chainloader by holding `Start` on boot, go to `Boot setup` in the fastboot3DS boot menu (hold `Home` on boot to get there again), then go to `Setup [slot 1]`, then highlight `Disable [slot 2]` and press `A`. Then keep pressing `B` until you are back at the main menu and choose `Continue boot` again. Holding `Start` on boot should now allow you to use the Luma3DS chainloader. 26 | 27 | Now that you have Luma3DS and fastboot3DS installed, let's put gba-net-boot on your SD card. In the `3ds` directory on your SD card, create a new directory called `gba-net-boot` and copy `gba-net-boot.3dsx` into it. 28 | 29 | Before gba-net-boot will work, you also need to copy [open_agb_firm](https://github.com/profi200/open_agb_firm) to your SD card. For gba-net-boot to work properly, you need to copy the `open_agb_firm.firm` file to one of two directories on your SD card: 30 | * `/3ds/gba-net-boot` 31 | * `/luma/payloads` 32 | 33 | When gba-net-boot looks for open_agb_firm, it first checks its current directory (`/3ds/gba-net-boot` if you followed this guide), then it checks the rest of the list in the order it is presented here. Without `open_agb_firm.firm` in one of those directories, gba-net-boot cannot reboot into open_agb_firm to allow you to test your ROM. If you want to use the Luma3DS chainloader to load open_agb_firm, use the `/luma/payloads` directory. If you want to set up a slot in fastboot3DS, it doesn't matter which one you choose. If you want gba-net-boot to use a different open_agb_firm from what Luma3DS or fastboot3DS use, you can copy one version of open_agb_firm into gba-net-boot's directory for gba-net-boot to use and another version in the appropriate directory for Luma3DS or fastboot3DS to use. 34 | 35 | Finally, make sure your 3DS has wifi enabled and is connected to the same network as the computer you will be sending your ROM from. 36 | 37 | To launch gba-net-boot, go to the 3DS Home Menu and launch the Homebrew Launcher, then find gba-net-boot and launch it. Refer to the other section for instructions on how to use it. 38 | 39 | ### Booting directly into the Homebrew Launcher 40 | For extra convenience, as long as you're using Luma3DS **v12.0** or later, you can automatically boot straight into the Homebrew Launcher. To do this, boot your 3DS while holding `Select`. In the Luma3DS configuration menu, go to the `Homebrew autoboot` or `Hbmenu autoboot` option (depending on your Luma3DS version) and select `3DS`, then press `Start` to save and continue booting. Until you change this option back to `Off`, your 3DS should skip the 3DS Home Menu and bring you straight to the Homebrew Launcher when you turn it on. 41 | 42 | ### Booting directly into gba-net-boot 43 | If you installed the [Homebrew Launcher Wrapper](https://github.com/PabloMK7/homebrew_launcher_dummy) as described in the guide, you can also boot straight into gba-net-boot, bypassing the 3DS Home Menu and Homebrew Launcher entirely, but there are some caveats to this: 44 | * Pressing `Start` to exit gba-net-boot will just restart gba-net-boot instead of sending you back to the Homebrew Launcher or 3DS Home Menu, but you can still get back to the 3DS Home Menu by pressing the `Home` button 45 | * If you go back to the 3DS Home Menu and try to launch the Homebrew Launcher from there, it will launch gba-net-boot instead 46 | * This will remove your ability to load the Homebrew Launcher at all unless you have a second wrapper installed for it, which you might need to build yourself 47 | 48 | If you still want to use this method, you will first need to get your 3DS set up to boot directly into the Homebrew Launcher as described above. Next, make a backup of the `boot.3dsx` file on your SD card, then copy `gba-net-boot.3dsx` to the root of your SD card and rename it to `boot.3dsx`. If you were keeping open_agb_firm in the same directory as gba-net-boot, you will also need to copy `open_agb_firm.firm` to the root of your SD card. 49 | 50 | To restore the Homebrew Launcher, you just need to restore the backup you made of `boot.3dsx` to the root of your SD card. You can also remove the copy of `open_agb_firm.firm` you made there. 51 | 52 | The reason the caveats mentioned above exist is because Luma3DS boots directly into the Homebrew Launcher by referencing the Title ID for the Homebrew Launcher Wrapper you installed to your 3DS Home Menu during the guide mentioned earlier. The Homebrew Launcher Wrapper looks for `boot.3dsx` on the root of your SD card and runs it. The `boot.3dsx` file is the Homebrew Launcher you would normally use to launch other `.3dsx` homebrew. By replacing `boot.3dsx` with gba-net-boot, the Homebrew Launcher Wrapper will run gba-net-boot instead, which means we've also lost our entry point to the Homebrew Launcher. 53 | 54 | ## How it works 55 | When you run gba-net-send, it sends a UDP broadcast, which gba-net-boot listens for and responds to. When gba-net-send receives a response from gba-net-boot, gba-net-send establishes a TCP connection to gba-net-send to transfer your ROM. The ROM is saved to the root of your SD card as `rom.gba`. 56 | 57 | After the transfer is completed and your ROM is saved, gba-net-boot copies open_agb_firm into a specific location in FCRAM and reboots the 3DS. Because we configured fastboot3DS to check for it and the FCRAM hasn't been cleared during the reboot, fastboot3DS sees that a firm (open_agb_firm in this case) has been loaded at this location and automatically boots into it. 58 | 59 | ## How to build 60 | Install [devkitARM and 3ds-dev from devkitPro](https://devkitpro.org/wiki/Getting_Started), then run `make` in the project directory. 61 | 62 | ## Known issues 63 | * If a transfer is interrupted, it will assume the transfer has completed successfully. File size needs to be communicated and checked. 64 | * Sometimes the UDP broadcast or ack is dropped. If this happens, try sending the ROM again. 65 | * Nothing is configurable right now. Configuration options are planned for the future. 66 | * This is my first C project, so I'm sure some (probably most) of the code is probably ugly and/or follows bad practices. 67 | 68 | ## Thanks 69 | * **[A9NC - ARM9 Netload Companion](https://github.com/d0k3/A9NC) devs** - code referenced for info on FCRAM firm boot 70 | * **[That-Shortcut-Thingy](https://github.com/SUOlivia/That-Shortcut-Thingy) devs** - code referenced for info on FCRAM firm boot 71 | * **SciresM** - clarification that `GSPGPU_FlushDataCache()` flushes CPU cache to RAM 72 | * **TuxSH** - clarification that `GSPGPU_FlushDataCache()` flushes CPU cache to RAM 73 | * **[Luma3DS](https://github.com/LumaTeam/Luma3DS) devs** 74 | * **[fastboot3DS](https://github.com/derrekr/fastboot3DS) devs** 75 | * **[libctru](https://github.com/devkitPro/libctru) devs** 76 | * **[devkitPro](https://devkitpro.org/) contributors** 77 | * **[3dbrew.org](https://www.3dbrew.org/) contributors** 78 | * Everyone who has contributed to the homebrew scene 79 | -------------------------------------------------------------------------------- /assets/icon.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/joshbackstein/gba-net-boot/952f342d9fd86825faf795d12499f5ad93746a8b/assets/icon.png -------------------------------------------------------------------------------- /source/main.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | #include 10 | 11 | #include 12 | #include 13 | 14 | #include <3ds.h> 15 | 16 | static const char* APP_TITLE = "GBA Net Boot v0.0.2 Beta"; 17 | static bool ENABLE_DEBUG = false; 18 | 19 | #define FCRAM_START_OLD_FW (0x14000000) 20 | #define FCRAM_START_NEW_FW (0x30000000) 21 | #define FIRM_MAX_SIZE (0x400000 - 0x200) 22 | #define FIRM_OFFSET (0x1000) 23 | void* firm_buffer = NULL; 24 | 25 | static const char* DEFAULT_FIRM_PATH = "open_agb_firm.firm"; 26 | static const char* LUMA_FIRM_PATH = "/luma/payloads/open_agb_firm.firm"; 27 | 28 | static FS_Archive sdmcArchive; 29 | static FS_Path ROM_PATH; 30 | static FS_Path FINAL_ROM_PATH; 31 | static Handle rom_fd; 32 | 33 | static const char* ROM_PATH_STR = "/rom.gba.tmp"; 34 | static const char* FINAL_ROM_PATH_STR = "/rom.gba"; 35 | static const s32 MAX_ROM_SIZE = 1024*1024*32; 36 | 37 | #define PORT 31313 38 | static const char* INIT_REQUEST = "gba_net_boot_init_beta_0001"; 39 | static const char* INIT_RESPONSE = "gba_net_boot_ack_beta_0001"; 40 | 41 | // 1 MiB for SOC buffer 42 | #define SOC_BUFFER_SIZE 0x100000 43 | #define SOC_ALIGN 0x1000 44 | static u32* SOC_buffer = NULL; 45 | 46 | // 8 MiB for TCP buffer 47 | #define TCP_BUFFER_SIZE 0x800000 48 | static u8* TCP_buffer = NULL; 49 | static s32 TCP_buffer_offset = 0; 50 | static s32 file_size = 0; 51 | static u32 bytes_written = 0; 52 | 53 | // 256 bytes for UDP buffer 54 | #define UDP_BUFFER_SIZE 0x100 55 | static u8* UDP_buffer = NULL; 56 | 57 | static s32 tcp_listener = -1; 58 | static s32 tcp_downloader = -1; 59 | static s32 udp_listener = -1; 60 | 61 | void failExit(const char* fmt, ...); 62 | 63 | void initSdmcStructs() { 64 | Result ret; 65 | ret = FSUSER_OpenArchive(&sdmcArchive, ARCHIVE_SDMC, fsMakePath(PATH_EMPTY, "")); 66 | if (R_FAILED(ret)) { 67 | failExit("could not open sdmc archive\n"); 68 | } 69 | ROM_PATH = fsMakePath(PATH_ASCII, ROM_PATH_STR); 70 | FINAL_ROM_PATH = fsMakePath(PATH_ASCII, FINAL_ROM_PATH_STR); 71 | } 72 | 73 | void deinitSdmcStructs() { 74 | Result ret; 75 | ret = FSUSER_CloseArchive(sdmcArchive); 76 | if (R_FAILED(ret)) { 77 | failExit("could not close sdmc archive\n"); 78 | } 79 | } 80 | 81 | void checkFirmAddress() { 82 | printf("Firm at 0x%08lx\n", (u32) firm_buffer + FIRM_OFFSET); 83 | if ((u32) firm_buffer != FCRAM_START_OLD_FW && (u32) firm_buffer != FCRAM_START_NEW_FW) { 84 | failExit("Bad firm location\n"); 85 | } 86 | } 87 | 88 | void loadOafFirm() { 89 | printf("\nLoading %s\n", DEFAULT_FIRM_PATH); 90 | FILE* firm_fd = fopen(DEFAULT_FIRM_PATH, "rb"); 91 | if (firm_fd) { 92 | printf(CONSOLE_GREEN); 93 | printf("Success\n"); 94 | printf(CONSOLE_RESET); 95 | } else { 96 | printf("Could not open file\n"); 97 | printf("\nLoading %s\n", LUMA_FIRM_PATH); 98 | firm_fd = fopen(LUMA_FIRM_PATH, "rb"); 99 | } 100 | if (firm_fd) { 101 | printf(CONSOLE_GREEN); 102 | printf("Success\n"); 103 | printf(CONSOLE_RESET); 104 | } else { 105 | printf("Could not open file\n"); 106 | } 107 | if (firm_fd == NULL) { 108 | failExit("Could not load any firm file\n"); 109 | } 110 | 111 | // Get size of file 112 | fseek(firm_fd, 0, SEEK_END); 113 | s32 firm_size = ftell(firm_fd); 114 | if (firm_size == -1) { 115 | fclose(firm_fd); 116 | failExit("Could not determine firm size\n"); 117 | } 118 | printf("Firm size: %ld\n", firm_size); 119 | printf("Max firm size: %d\n", FIRM_MAX_SIZE); 120 | if (firm_size > FIRM_MAX_SIZE) { 121 | fclose(firm_fd); 122 | failExit("Selected firm too large\n"); 123 | } 124 | 125 | // Go to beginning of file 126 | fseek(firm_fd, 0, SEEK_SET); 127 | 128 | // Copy into buffer 129 | printf("\nCopying firm into memory\n"); 130 | s32 bytes_read = fread(firm_buffer + FIRM_OFFSET, 1, firm_size, firm_fd); 131 | if (bytes_read != firm_size) { 132 | fclose(firm_fd); 133 | failExit("Could not copy firm into memory\n"); 134 | } 135 | 136 | printf(CONSOLE_GREEN); 137 | printf("Success\n"); 138 | printf(CONSOLE_RESET); 139 | fclose(firm_fd); 140 | } 141 | 142 | void openRom() { 143 | Result ret; 144 | ret = FSUSER_OpenFile(&rom_fd, sdmcArchive, ROM_PATH, FS_OPEN_CREATE | FS_OPEN_WRITE, 0); 145 | if (R_FAILED(ret)) { 146 | failExit("could not open ROM for writing\n"); 147 | } 148 | } 149 | 150 | void closeRom() { 151 | Result ret; 152 | ret = FSFILE_Close(rom_fd); 153 | if (R_FAILED(ret) && R_SUMMARY(ret) != RS_INVALIDARG) { 154 | if (ENABLE_DEBUG) { 155 | printf("Result %ld\n", ret); 156 | printf("R_LEVEL %ld\n", R_LEVEL(ret)); 157 | printf("R_SUMMARY %ld\n", R_SUMMARY(ret)); 158 | printf("R_MODULE %ld\n", R_MODULE(ret)); 159 | printf("R_DESCRIPTION %ld\n", R_DESCRIPTION(ret)); 160 | printf("errno: %d\n", errno); 161 | printf("errno str: %s\n", strerror(errno)); 162 | } 163 | failExit("could not close ROM\n"); 164 | } 165 | } 166 | 167 | void moveRomToFinalPath() { 168 | Result ret; 169 | ret = FSUSER_DeleteFile(sdmcArchive, FINAL_ROM_PATH); 170 | if (R_FAILED(ret) && R_SUMMARY(ret) != RS_NOTFOUND) { 171 | if (ENABLE_DEBUG) { 172 | printf("Result %ld\n", ret); 173 | printf("R_LEVEL %ld\n", R_LEVEL(ret)); 174 | printf("R_SUMMARY %ld\n", R_SUMMARY(ret)); 175 | printf("R_MODULE %ld\n", R_MODULE(ret)); 176 | printf("R_DESCRIPTION %ld\n", R_DESCRIPTION(ret)); 177 | printf("errno: %d\n", errno); 178 | printf("errno str: %s\n", strerror(errno)); 179 | } 180 | failExit("could not delete existing ROM\n"); 181 | } 182 | ret = FSUSER_RenameFile(sdmcArchive, ROM_PATH, sdmcArchive, FINAL_ROM_PATH); 183 | if (R_FAILED(ret)) { 184 | if (ENABLE_DEBUG) { 185 | printf("Result %ld\n", ret); 186 | printf("R_LEVEL %ld\n", R_LEVEL(ret)); 187 | printf("R_SUMMARY %ld\n", R_SUMMARY(ret)); 188 | printf("R_MODULE %ld\n", R_MODULE(ret)); 189 | printf("R_DESCRIPTION %ld\n", R_DESCRIPTION(ret)); 190 | printf("errno: %d\n", errno); 191 | printf("errno str: %s\n", strerror(errno)); 192 | } 193 | failExit("could not move ROM to final path\n"); 194 | } 195 | } 196 | 197 | // Returns true on successful connection 198 | bool waitForWifi() { 199 | u32 wifi = 0; 200 | // Check if wifi is connected 201 | if (R_FAILED(ACU_GetWifiStatus(&wifi)) || !wifi) { 202 | printf(CONSOLE_YELLOW); 203 | printf("\nWaiting for wifi\n"); 204 | printf(CONSOLE_RESET); 205 | printf("\nPress " CONSOLE_RED "Start" CONSOLE_RESET " to exit\n"); 206 | while (!wifi && aptMainLoop()) { 207 | gspWaitForVBlank(); 208 | hidScanInput(); 209 | 210 | // Check if wifi is connected 211 | if (R_FAILED(ACU_GetWifiStatus(&wifi)) || !wifi) { 212 | wifi = 0; 213 | } 214 | 215 | u32 kDown = hidKeysDown(); 216 | if (kDown & KEY_START) return false; 217 | } 218 | } 219 | printf(CONSOLE_GREEN); 220 | printf("\nWifi connected\n"); 221 | printf(CONSOLE_RESET); 222 | return true; 223 | } 224 | 225 | void displayIpAddress() { 226 | struct in_addr ip_addr; 227 | struct in_addr netmask_addr; 228 | struct in_addr broadcast_addr; 229 | int ret = SOCU_GetIPInfo(&ip_addr, &netmask_addr, &broadcast_addr); 230 | if (ret) { 231 | failExit("could not get IP info\n"); 232 | } 233 | printf("IP address: %s\n", inet_ntoa(ip_addr)); 234 | } 235 | 236 | void socShutdown() { 237 | printf("Waiting for socExit...\n"); 238 | socExit(); 239 | } 240 | 241 | void allocateSocketBuffers() { 242 | TCP_buffer = malloc(TCP_BUFFER_SIZE); 243 | if (TCP_buffer == NULL) { 244 | failExit("failed to allocate buffer for TCP socket\n"); 245 | } 246 | memset(TCP_buffer, 0, TCP_BUFFER_SIZE); 247 | 248 | UDP_buffer = malloc(UDP_BUFFER_SIZE); 249 | if (UDP_buffer == NULL) { 250 | failExit("failed to allocate buffer for UDP socket\n"); 251 | } 252 | memset(UDP_buffer, 0, UDP_BUFFER_SIZE); 253 | } 254 | 255 | void freeSocketBuffers() { 256 | if (TCP_buffer != NULL) free(TCP_buffer); 257 | if (UDP_buffer != NULL) free(UDP_buffer); 258 | } 259 | 260 | void closeSockets() { 261 | if (tcp_listener >= 0) { 262 | close(tcp_listener); 263 | tcp_listener = -1; 264 | } 265 | if (tcp_downloader >= 0) { 266 | close(tcp_downloader); 267 | tcp_downloader = -1; 268 | } 269 | if (udp_listener >= 0) { 270 | close(udp_listener); 271 | udp_listener = -1; 272 | } 273 | } 274 | 275 | void setUpTcpListener() { 276 | int ret = 0; 277 | 278 | // Create TCP socket 279 | tcp_listener = socket(AF_INET, SOCK_STREAM, 0); 280 | if (tcp_listener < 0) { 281 | failExit("could not create tcp socket\n"); 282 | } 283 | struct sockaddr_in tcp_listen_addr; 284 | memset(&tcp_listen_addr, 0, sizeof(tcp_listen_addr)); 285 | tcp_listen_addr.sin_family = AF_INET; 286 | tcp_listen_addr.sin_port = htons(PORT); 287 | tcp_listen_addr.sin_addr.s_addr = htonl(INADDR_ANY); 288 | 289 | // Bind TCP socket to listen for broadcasts 290 | ret = bind(tcp_listener, (struct sockaddr*) &tcp_listen_addr, sizeof(tcp_listen_addr)); 291 | if (ret) { 292 | failExit("could not bind tcp socket\n"); 293 | } 294 | 295 | // Set TCP socket to non-blocking so we can read input to exit 296 | fcntl(tcp_listener, F_SETFL, fcntl(tcp_listener, F_GETFL, 0) | O_NONBLOCK); 297 | 298 | // Start listening on TCP socket 299 | ret = listen(tcp_listener, 5); 300 | if (ret) { 301 | failExit("could not listen on tcp socket\n"); 302 | } 303 | } 304 | 305 | void setUpUdpListener() { 306 | int ret = 0; 307 | 308 | // Create UDP socket 309 | udp_listener = socket(AF_INET, SOCK_DGRAM, 0); 310 | if (udp_listener < 0) { 311 | failExit("could not create udp socket\n"); 312 | } 313 | struct sockaddr_in udp_listen_addr; 314 | memset(&udp_listen_addr, 0, sizeof(udp_listen_addr)); 315 | udp_listen_addr.sin_family = AF_INET; 316 | udp_listen_addr.sin_port = htons(PORT); 317 | udp_listen_addr.sin_addr.s_addr = htonl(INADDR_ANY); 318 | 319 | // Bind UDP socket to listen for broadcasts 320 | ret = bind(udp_listener, (struct sockaddr*) &udp_listen_addr, sizeof(udp_listen_addr)); 321 | if (ret) { 322 | failExit("could not bind udp socket\n"); 323 | } 324 | 325 | // Set UDP socket to non-blocking so we can read input to exit 326 | fcntl(udp_listener, F_SETFL, fcntl(udp_listener, F_GETFL, 0) | O_NONBLOCK); 327 | } 328 | 329 | void checkUdpBroadcast(struct sockaddr_in* addr) { 330 | u32 addr_len = sizeof(*addr); 331 | int recv_len = recvfrom(udp_listener, UDP_buffer, UDP_BUFFER_SIZE, 0, (struct sockaddr*) addr, &addr_len); 332 | if (recv_len == -1 && errno != EAGAIN && errno != EWOULDBLOCK) { 333 | printf("errno: %d\n", errno); 334 | printf("errno str: %s\n", strerror(errno)); 335 | failExit("could not receive from udp socket\n"); 336 | } 337 | if (recv_len == -1) { 338 | return; 339 | } 340 | 341 | if (strncmp((const char*) UDP_buffer, INIT_REQUEST, strlen(INIT_REQUEST))) { 342 | return; 343 | } 344 | printf("\nReceived init request\n"); 345 | 346 | printf("Acknowledging request\n"); 347 | int send_len = sendto(udp_listener, INIT_RESPONSE, strlen(INIT_RESPONSE), 0, (const struct sockaddr*) addr, addr_len); 348 | if (send_len == -1) { 349 | failExit("could not respond to udp broadcast\n"); 350 | } 351 | } 352 | 353 | // Returns true if we're still waiting for more bytes 354 | bool checkTcpSocket(struct sockaddr_in* addr) { 355 | u32 addr_len = sizeof(*addr); 356 | if (tcp_downloader < 0) { 357 | tcp_downloader = accept(tcp_listener, (struct sockaddr*) addr, &addr_len); 358 | if (tcp_downloader >= 0) { 359 | printf("\nConnecting to port %d from %s\n", addr->sin_port, inet_ntoa(addr->sin_addr)); 360 | } 361 | } 362 | if (tcp_downloader < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { 363 | printf("errno: %d\n", errno); 364 | printf("errno str: %s\n", strerror(errno)); 365 | failExit("could not accept connection from tcp socket\n"); 366 | } 367 | if (tcp_downloader < 0) { 368 | // No connections to accept 369 | return true; 370 | } 371 | 372 | s32 recv_len = recv(tcp_downloader, TCP_buffer + TCP_buffer_offset, TCP_BUFFER_SIZE - TCP_buffer_offset, 0); 373 | if (recv_len == -1 && errno != EAGAIN && errno != EWOULDBLOCK) { 374 | printf("errno: %d\n", errno); 375 | printf("errno str: %s\n", strerror(errno)); 376 | failExit("could not receive from tcp socket\n"); 377 | } 378 | if (recv_len == -1) { 379 | // Nothing to receive 380 | return true; 381 | } 382 | 383 | // No point in writing to the file until we've filled up the buffer 384 | TCP_buffer_offset += recv_len; 385 | if (TCP_buffer_offset == TCP_BUFFER_SIZE || recv_len == 0) { 386 | openRom(); 387 | printf(CONSOLE_MAGENTA); 388 | printf("Writing %ld bytes to file\n", TCP_buffer_offset); 389 | printf(CONSOLE_RESET); 390 | u32 num_bytes = 0; 391 | Result ret; 392 | ret = FSFILE_Write(rom_fd, &num_bytes, bytes_written, TCP_buffer, TCP_buffer_offset, FS_WRITE_FLUSH); 393 | if (R_FAILED(ret)) { 394 | failExit("could not write to file\n"); 395 | } 396 | closeRom(); 397 | if (num_bytes != TCP_buffer_offset) { 398 | failExit("could not write all bytes to file\n"); 399 | } 400 | bytes_written += num_bytes; 401 | TCP_buffer_offset = 0; 402 | } 403 | 404 | file_size += recv_len; 405 | printf("Receiving ROM: %ld bytes\r", file_size); 406 | 407 | if (recv_len == 0 || file_size >= MAX_ROM_SIZE) { 408 | // We've received everything 409 | printf(CONSOLE_GREEN); 410 | printf("\x1b[2K\rROM transfer complete\n"); 411 | printf(CONSOLE_RESET); 412 | printf("ROM size: %ld bytes\n", file_size); 413 | return false; 414 | } 415 | 416 | return true; 417 | } 418 | 419 | int main(int argc, char** argv) { 420 | int ret = 0; 421 | 422 | initSdmcStructs(); 423 | atexit(deinitSdmcStructs); 424 | 425 | atexit(closeSockets); 426 | 427 | gfxInitDefault(); 428 | atexit(gfxExit); 429 | 430 | consoleInit(GFX_TOP, NULL); 431 | 432 | printf(CONSOLE_GREEN); 433 | printf("%s\n\n", APP_TITLE); 434 | printf(CONSOLE_RESET); 435 | 436 | // Make sure the firm buffer is at the beginning of FCRAM 437 | checkFirmAddress(); 438 | 439 | // Make sure we close the ROM before exiting 440 | atexit(closeRom); 441 | 442 | // Wait for wifi 443 | bool should_continue = waitForWifi(); 444 | if (!should_continue) { 445 | printf("\nExiting...\n"); 446 | for (int i = 0; i < 60; i++) gspWaitForVBlank(); 447 | return 0; 448 | } 449 | 450 | // Allocate buffer for SOC service 451 | SOC_buffer = (u32*)memalign(SOC_ALIGN, SOC_BUFFER_SIZE); 452 | if (SOC_buffer == NULL) { 453 | failExit("memalign: failed to allocate\n"); 454 | } 455 | 456 | // Initialize soc:u service 457 | ret = socInit(SOC_buffer, SOC_BUFFER_SIZE); 458 | if (ret) { 459 | failExit("socInit: 0x%08x\n", (u32)ret); 460 | } 461 | atexit(socShutdown); 462 | 463 | // Display IP address 464 | displayIpAddress(); 465 | 466 | // Allocate UDP and TCP buffers 467 | allocateSocketBuffers(); 468 | atexit(freeSocketBuffers); 469 | 470 | setUpTcpListener(); 471 | setUpUdpListener(); 472 | 473 | printf("\nPress " CONSOLE_RED "Start" CONSOLE_RESET " to exit\n"); 474 | printf("Press " CONSOLE_YELLOW "Select" CONSOLE_RESET " to reboot into open_agb_firm\n"); 475 | printf("\n" CONSOLE_CYAN "Waiting for init packet" CONSOLE_RESET "\n"); 476 | struct sockaddr_in udp_broadcaster_addr; 477 | struct sockaddr_in tcp_downloader_addr; 478 | bool waiting_for_file = true; 479 | bool should_reboot = false; 480 | bool download_complete = false; 481 | while (aptMainLoop()) { 482 | gspWaitForVBlank(); 483 | hidScanInput(); 484 | 485 | // We only need to check for broadcasts if we haven't received any bytes yet 486 | if (!file_size) { 487 | checkUdpBroadcast(&udp_broadcaster_addr); 488 | } 489 | 490 | if (waiting_for_file) { 491 | waiting_for_file = checkTcpSocket(&tcp_downloader_addr); 492 | } 493 | 494 | if (!waiting_for_file) { 495 | // Break out of loop so we can reboot into open_agb_firm 496 | should_reboot = true; 497 | // Assume download is complete 498 | download_complete = true; 499 | break; 500 | } 501 | 502 | u32 kDown = hidKeysDown(); 503 | if (kDown & KEY_SELECT) { 504 | // Break out of loop so we can reboot into open_agb_firm 505 | should_reboot = true; 506 | break; 507 | } 508 | if (kDown & KEY_START) break; 509 | } 510 | 511 | if (download_complete) { 512 | moveRomToFinalPath(); 513 | } 514 | 515 | if (ENABLE_DEBUG) { 516 | printf("\nPress Start to continue\n"); 517 | while (aptMainLoop()) { 518 | gspWaitForVBlank(); 519 | hidScanInput(); 520 | u32 kDown = hidKeysDown(); 521 | if (kDown & KEY_START) break; 522 | } 523 | } 524 | 525 | if (should_reboot) { 526 | // Load open_agb_firm into memory 527 | loadOafFirm(); 528 | printf("\nRebooting into open_agb_firm...\n"); 529 | for (int i = 0; i < 60; i++) gspWaitForVBlank(); 530 | // Turn the wifi LED off 531 | MCUHWC_SetWifiLedState(false); 532 | APT_HardwareResetAsync(); 533 | } else { 534 | printf("\nExiting...\n"); 535 | for (int i = 0; i < 60; i++) gspWaitForVBlank(); 536 | } 537 | 538 | return 0; 539 | } 540 | 541 | void failExit(const char* fmt, ...) { 542 | closeSockets(); 543 | freeSocketBuffers(); 544 | 545 | va_list ap; 546 | printf(CONSOLE_RED); 547 | va_start(ap, fmt); 548 | vprintf(fmt, ap); 549 | va_end(ap); 550 | printf(CONSOLE_RESET); 551 | printf("\nPress B to exit\n"); 552 | 553 | while (aptMainLoop()) { 554 | gspWaitForVBlank(); 555 | hidScanInput(); 556 | 557 | u32 kDown = hidKeysDown(); 558 | if (kDown & KEY_B) exit(0); 559 | } 560 | } 561 | 562 | void __attribute__((weak)) __appInit(void) { 563 | // Allocate before anything happens to make sure we get the right memory 564 | // offset for the firm buffer 565 | firm_buffer = linearAlloc(FIRM_OFFSET + FIRM_MAX_SIZE); 566 | 567 | // Initialize services 568 | srvInit(); 569 | aptInit(); 570 | acInit(); 571 | hidInit(); 572 | fsInit(); 573 | mcuHwcInit(); 574 | archiveMountSdmc(); 575 | } 576 | 577 | void __attribute__((weak)) __appExit(void) { 578 | // Exit services 579 | archiveUnmountAll(); 580 | mcuHwcExit(); 581 | fsExit(); 582 | hidExit(); 583 | acExit(); 584 | aptExit(); 585 | srvExit(); 586 | 587 | // Flush CPU cache into RAM before freeing firm buffer 588 | GSPGPU_FlushDataCache(firm_buffer, FIRM_MAX_SIZE); 589 | linearFree(firm_buffer); 590 | } 591 | --------------------------------------------------------------------------------