This repository contains ESP32 simulator for linux.
ESP-IDF contains small amount of hardware specific code, FreeRTOS and few multi-platform libraries.
This project uses FreeRTOS port for POSIX, LWIP for TCP/IP layer and mbedtls for cryptography functions.
In addition, several useful APIs from esp-idf are implemented eg. logging.
With this project you can write a program, which will be runnable and testable on Linux.
This project requires tun kernel module and configured tap0 interface to work. To configure tap0 run following commands:
sudo ip tuntap add dev tap0 mode tap user `whoami`
sudo ip link set tap0 up
sudo ip addr add 10.0.0.1/24 dev tap0
export PRECONFIGURED_TAPIF=tap0
Simulator can be connected to internet using masquerade. First we need to enable forwarding.
sudo echo 1 > /proc/sys/net/ipv4/ip_forward
Simple nftables forwarding rules:
#!/sbin/nft -f
flush ruleset
table inet filter {
chain input {
type filter hook input priority 0; policy drop;
ct state invalid counter drop
ct state {established, related} counter accept
iif lo accept
iif != lo ip daddr 127.0.0.1/8 counter drop
iif != lo ip6 daddr ::1/128 counter drop
ip protocol icmp counter accept
ip6 nexthdr icmpv6 counter accept
iifname tap0 accept
}
chain forward {
type filter hook forward priority 0; policy accept;
}
chain output {
type filter hook output priority 0; policy accept;
}
}
table ip nat {
chain input {
type nat hook input priority 0; policy accept;
ip protocol icmp accept
}
chain prerouting {
type nat hook prerouting priority 0; policy accept;
}
chain postrouting {
type nat hook postrouting priority 100; policy accept;
ip daddr != 10.0.0.0/24 ip saddr 10.0.0.0/24 masquerade;
}
chain output {
type nat hook output priority 0; policy accept;
}
}
sudo apt install -y git wget flex bison gperf python3 python3-pip python3-setuptools python3-serial python3-click python3-cryptography python3-future python3-pyparsing python3-pyelftools cmake ninja-build ccache libffi-dev libssl-dev libusb-1.0-0
mkdir esp
cd esp
git clone -b release/v5.2 --recursive https://github.com/espressif/esp-idf.git
./esp-idf/install.sh
. ./esp-idf/export.sh
git clone --recursive https://github.com/mireq/esp32-simulator
cd simulator/example
idf.py build
./build/example
docker build -t esp32-simulator .
docker run --cap-add=NET_ADMIN --device /dev/net/tun:/dev/net/tun --name esp32-simulator -v `pwd`:/root/simulator -d esp32-simulator
docker exec -i -t esp32-simulator bash
cd ~/simulator/example
idf.py build
./build/example
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