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README.md
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# youtubeUnblock
Bypasses Googlevideo detection systems that relies on SNI. The package is for Linux only. The package is fully compatible with router running with OpenWRT. To learn how to build the package on OpenWRT, consult [this chapter](https://github.com/Waujito/youtubeUnblock?tab=readme-ov-file#openwrt-case).
Bypasses Googlevideo detection systems that relies on SNI. The package is for Linux only. The package is fully compatible with routers running OpenWRT. To learn how to build the package on OpenWRT, consult [this chapter](https://github.com/Waujito/youtubeUnblock?tab=readme-ov-file#openwrt-case).
For Windows use [GoodbyeDPI from ValdikSS](https://github.com/ValdikSS/GoodbyeDPI) (you can find how to use it for YouTube [here](https://github.com/ValdikSS/GoodbyeDPI/issues/378)) The same behavior is also implemented in [zapret package for linux](https://github.com/bol-van/zapret).
@ -56,16 +56,17 @@ EPERM may occur in a lot of places but generally here are two: mnl_cb_run and wh
If you have bad performance you can queue to youtubeUnblock only first, say, 20 packets from the connection. To do so, use nftables conntrack packets counter: `nft add rule inet fw4 mangle_forward tcp dport 443 ct original "packets < 20" counter queue num 537 bypass`. For my 1 CPU core device it worked pretty well. This works because we do care about only first packets with ClientHello. We don't need to process others.
The same behavior is also possible in iptables: `iptables -t mangle -A FORWARD -p tcp -m tcp --dport 443 -m connbytes --connbytes-dir original --connbytes-mode packets --connbytes 0:19 -j NFQUEUE --queue-num 537 --queue-bypass`. (The package iptables-mod-conntrack-extra is required for connbytes on OpenWRT)
For hosts change FORWARD to OUTPUT.
You can use `--queue-balance` with multiple instances of youtubeUnblock. This behavior is supported via multithreading. Just pass -DTHREADS_NUM=n where n stands for an amount of threads you want to be enabled. The n defaults to 1. The maximum threads defaults to 16 but may be altered programatically. Note, that if you are about to increase it, here is 100% chance that you are on the wrong way.
## OpenWRT case
The package is also compatible with routers. The router should be running by free opensource linux-based system such as [OpenWRT](https://openwrt.org/).
You can build under openwrt with two options: first - through the SDK, which is preferred way or cross-compile manually with openwrt toolchain.
The package is also compatible with routers. The router should be running by linux-based system such as [OpenWRT](https://openwrt.org/).
You can build under openwrt with two options: first - through the SDK, which is preferred way and second is cross-compile manually with openwrt toolchain.
### Building OpenWRT .ipk package
OpenWRT provides a high-level SDK for the package building.
First step is to download or compile OpenWRT SDK for your specific platform. The SDK can be compiled according to [this tutorial](https://openwrt.org/docs/guide-developer/toolchain/using_the_sdk). Beside of raw source code of SDK, OpenWRT also offers precompiled SDKs for your router. You can find it on your router page. For example, I have ramips/mt76x8 based router so for me the sdk is on https://downloads.openwrt.org/releases/23.05.3/targets/ramips/mt76x8/ and called `openwrt-sdk-23.05.3-ramips-mt76x8_gcc-12.3.0_musl.Linux-x86_64`. You will need to [install sdk requirements on your system](https://openwrt.org/docs/guide-developer/toolchain/install-buildsystem) If you have any problems, use docker ubuntu:24.04 image. Next, untar the SDK and cd it. Do `echo "src-git youtubeUnblock https://github.com/Waujito/youtubeUnblock.git;openwrt" >> feeds.conf`, `./scripts/feeds update youtubeUnblock`, `./scripts/feeds install -a -p youtubeUnblock`, `make package/youtubeUnblock/compile`. Now the packet is built and you can import it to the router. Find it in `bin/packages/<target>/youtubeUnblock/youtubeUnblock-<version>.ipk`. Go to your router interface and put it via System-Software-install_package. Now the package is on the router. Goto System-Startup, restart firewall and start youtubeUnblock. You are done!
OpenWRT provides a high-level SDK for the package builds.
First step is to download or compile OpenWRT SDK for your specific platform. The SDK can be compiled according to [this tutorial](https://openwrt.org/docs/guide-developer/toolchain/using_the_sdk). Beside of raw source code of SDK, OpenWRT also offers precompiled SDKs for your router. You can find it on the router page. For example, I have ramips/mt76x8 based router so for me the sdk is on https://downloads.openwrt.org/releases/23.05.3/targets/ramips/mt76x8/ and called `openwrt-sdk-23.05.3-ramips-mt76x8_gcc-12.3.0_musl.Linux-x86_64`. You will need to [install sdk requirements on your system](https://openwrt.org/docs/guide-developer/toolchain/install-buildsystem) If you have any problems, use docker ubuntu:24.04 image. Make sure to be a non-root user since some makesystem fails with it. Next, untar the SDK and cd into it. Do `echo "src-git youtubeUnblock https://github.com/Waujito/youtubeUnblock.git;openwrt" >> feeds.conf`, `./scripts/feeds update youtubeUnblock`, `./scripts/feeds install -a -p youtubeUnblock`, `make package/youtubeUnblock/compile`. Now the packet is built and you can import it to the router. Find it in `bin/packages/<target>/youtubeUnblock/youtubeUnblock-<version>.ipk`. Go to your router interface and put it in via System-Software-install_package. Now the package is on the router. Goto System-Startup, restart firewall and start youtubeUnblock. You are done!
### Building with toolchain
The precompiled toolchain located near the SDK. For me it is called `openwrt-toolchain-23.05.3-ramips-mt76x8_gcc-12.3.0_musl.Linux-x86_64.tar.xz`. When you download the toolchain, untar it somewhere. Now we are ready for compilation. My cross gcc asked me to create a staging dir for it and pass it as an environment variable. Also you should notice toolsuite packages and replace my make command with yours. ```STAGING_DIR=temp make CC=/usr/bin/mipsel-openwrt-linux-gcc LD=/usr/bin/mipsel-openwrt-linux-ld AR=/usr/bin/mipsel-openwrt-linux-ar OBJDUMP=/usr/bin/mipsel-openwrt-linux-objdump NM=/usr/bin/mipsel-openwrt-linux-nm STRIP=/usr/bin/mipsel-openwrt-linux-strip CROSS_COMPILE_PLATFORM=mipsel-buildroot-linux-gnu```. Take a look at `CROSS_COMPILE_PLATFORM` It is required by autotools but I think it is not necessary. Anyways I put `mipsel-buildroot-linux-gnu` in here. For your model may be an [automake cross-compile manual](https://www.gnu.org/software/automake/manual/html_node/Cross_002dCompilation.html) will be helpful. When compilation is done, the binary file will be in build directory. Copy it to your router. Note that an ssh access is likely to be required to proceed. sshfs don't work on my model so I injected the application to the router via Software Upload Package page. It has given me an error, but also a `/tmp/upload.ipk` file which I copied in root directory, `chmod +x`-ed and run.

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youtubeUnblock.service
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StandardError=journal
StandardOutput=journal
StandardInput=null
ExecStartPre=iptables -t mangle -A OUTPUT -p tcp --dport 443 -j NFQUEUE --queue-num 537 --queue-bypass
ExecStartPre=iptables -t mangle -A OUTPUT -p tcp -m tcp --dport 443 -m connbytes --connbytes-dir original --connbytes-mode packets --connbytes 0:19 -j NFQUEUE --queue-num 537 --queue-bypass
ExecStart=$(PREFIX)/bin/youtubeUnblock 537
ExecStop=iptables -t mangle -D OUTPUT -p tcp --dport 443 -j NFQUEUE --queue-num 537 --queue-bypass