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This is a repository containing some code artifacts but mostly testing fragments for a project to develop a device to connect landline phones to other landline phones via a private VoIP network. At time of writing of this README (July 2024) efforts are mostly focused on the design of the hardware side of the project, but this repository may come to house more complete companion software as the project grows.
The Pi is set up with the hostname peterpi.local and can be SSH'ed to using the username recurse.
ssh [email protected]
sudo sed --in-place=.bak --expression='s/^#PermitEmptyPasswords no/PermitEmptyPasswords yes/g' /etc/ssh/sshd_config
sudo systemctl restart sshd
sudo passwd -d recurse
These commands are used to send sine wave signals to the speakers of the Pi. By correctly routing the output audio device of the Pi to "headphones" routed to pins, these signals can be sent to the phone. The following two sine waves are the frequencies used in a standard dial tone.
speaker-test -t sine -f 350 -l0
speaker-test -t sine -f 440 -l0
cross build --target=arm-unknown-linux-gnueabihf
scp phoneodeo.dts [email protected]:
scp bootconfig.txt [email protected]:
dtc -@ -H epapr -O dtb -o phoneodeo.dtbo -Wno-unit_address_vs_reg phoneodeo.dts
sudo cp phoneodeo.dtbo /boot/overlays
sudo chown root:root bootconfig.txt
sudo chmod 755 bootconfig.txt
sudo cp bootconfig.txt /boot/firmware/config.txt
scp goertzel/phreak.service [email protected]:
scp goertzel/phreak.timer [email protected]:
scp goertzel/target/arm-unknown-linux-gnueabihf/release/goertzel [email protected]:
sudo chown root:root ~/phreak.service
sudo chmod 777 ~/phreak.service
sudo mv ~/phreak.service /etc/systemd/system
sudo systemctl disable phreak.service
sudo systemctl enable phreak.service
sudo chown root:root ~/phreak.timer
sudo chmod 777 ~/phreak.timer
sudo mv ~/phreak.timer /etc/systemd/system
sudo systemctl enable phreak.timer
sudo systemctl start phreak.timer
scp asoundrc [email protected]:.asoundrc
sudo cp .asoundrc /root
amixer sset PCM -M '40%'
sudo alsactl store
sudo nmcli connection delete 'Recurse Center'; sudo reboot
Install some cross-compilation dependencies
brew tap messense/macos-cross-toolchains
brew install arm-unknown-linux-gnueabihf
rustup target add arm-unknown-linux-gnueabihf
brew install cmake # dependency of aws-lc-sys
cargo install --force --locked bindgen-cli # dependency of aws-lc-sys
Need to pass the sysroot in order to get around this error:
--- stderr
/Users/peter/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.30.0/aws-lc/include/openssl/base.h:61:10: fatal error: 'stdlib.h' file not found
thread 'main' panicked at /Users/peter/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.30.0/builder/sys_bindgen.rs:110:10:
Unable to generate bindings.: ClangDiagnostic("/Users/peter/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/aws-lc-sys-0.30.0/aws-lc/include/openssl/base.h:61:10: fatal error: 'stdlib.h' file not found\n")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Got some help from these sources:
BINDGEN_EXTRA_CLANG_ARGS=--sysroot="$(xcrun --sdk macosx --show-sdk-path)" cargo build --release --target=arm-unknown-linux-gnueabihf
Install some cross-compilation dependencies
brew tap messense/macos-cross-toolchains
brew install x86_64-unknown-linux-gnu
export CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=x86_64-linux-gnu-gcc
Helpful resources:
PATH="$PATH:/opt/homebrew/Cellar/x86_64-unknown-linux-gnu/13.3.0/bin" cargo build --release --target x86_64-unknown-linux-gnu --features http --bin dialbutton
wget https://downloads.asterisk.org/pub/telephony/asterisk/asterisk-20-current.tar.gz
tar -xzvf asterisk-20-current.tar.gz
cd asterisk-20.9.3
./contrib/scripts/install_prereq install &&
./configure &&
make &&
make install
Edit pjsip.conf on the remote
asterisk -x 'module reload'
sudo apt-get update
sudo apt-get install -y snapd
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot
sudo certbot -d pbx.frandline.com --manual --preferred-challenges dns certonly --manual-auth-hook /home/ubuntu/renew.sh
sudo su
curl -LsSf https://astral.sh/uv/install.sh | sh
Test:
sudo certbot renew --dry-run
Cygwin:
socat -t30 -T30 UDP4-RECVFROM:5060,fork UDP4:"$(wsl hostname -I | tr -d ' ')":5062 &
socat -t30 -T30 UDP4-RECVFROM:5061,fork UDP4:"$(wsl hostname -I | tr -d ' ')":5063 &
PowerShell (administrator):
netsh interface portproxy add v4tov4 listenaddress=x.x.x.x listenport=22 connectaddress=$($(wsl hostname -I).Trim()) connectport=22
netsh advfirewall firewall add rule name=”Open Port 22 for WSL2” dir=in action=allow protocol=TCP localport=22
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