Include mac80211_hwsim module in Docker development environment image.

.docker/netremote-dev/Dockerfile

@@ -85,9 +85,10 @@ RUN apt-get update && \
         ssh \
         sudo \
         # Generic development tools.
-        # emacs gdb nano policycoreutils-python-utils python-is-python3 vim
+        # emacs gdb kmod nano policycoreutils-python-utils python-is-python3 vim
         emacs \
         gdb \
+        kmod \
         nano \
         policycoreutils-python-utils \
         python-is-python3 \
@@ -98,14 +99,16 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/*
 
 # Copy outside content into container.
-COPY entrypoint.sh /bin/entrypoint.sh
-COPY 50-sysinfo /etc/update-motd.d/50-sysinfo
+COPY --chmod=0755 entrypoint.sh /bin/entrypoint.sh
+COPY --chmod=0755 50-sysinfo /etc/update-motd.d/50-sysinfo
+COPY --chmod=0755 build-mac80211_hwsim-kmod.sh /tmp/build-mac80211_hwsim-kmod.sh
 
 # Message of the day settings.
-RUN chmod 0755 /etc/update-motd.d/50-sysinfo && \
-    rm -f /etc/update-motd.d/50-landscape-sysinfo && \
-    # Permission for entrypoint script
-    chmod +x /bin/entrypoint.sh
+RUN rm -f /etc/update-motd.d/50-landscape-sysinfo
+
+# Build the mac80211_hwsim kernel module.
+RUN /tmp/build-mac80211_hwsim-kmod.sh && \
+    mv /tmp/build-mac80211_hwsim-kmod.sh ${HOME}/
 
 # Set entrypoint and start interactive shell (bash).
 ENTRYPOINT [ "/bin/entrypoint.sh" ]

.docker/netremote-dev/build-mac80211_hwsim-kmod.sh

@@ -0,0 +1,95 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+DEBUG=1
+
+# Determine active kernel version number.
+KERNEL_VERSION=`uname -r | grep -Eo '([0-9]+)*(\.?[0-9]+)*' | head -1`
+
+# URL for kernel sources of active kernel version.
+KERNEL_FILE_NAME_PREFIX=linux-msft-wsl-
+KERNEL_FILE_NAME_STEM=${KERNEL_FILE_NAME_PREFIX}${KERNEL_VERSION}
+KERNEL_FILE_NAME_SUFFIX=.tar.gz
+KERNEL_FILE_NAME=${KERNEL_FILE_NAME_STEM}${KERNEL_FILE_NAME_SUFFIX}
+KERNEL_URL_BASE=https://github.com/microsoft/WSL2-Linux-Kernel/archive/refs/tags
+KERNEL_URL_FILE=${KERNEL_URL_BASE}/${KERNEL_FILE_NAME}
+KERNEL_CONFIG_UTIL=scripts/config
+
+# WSL kernel source directory name.
+WSL_SRC_DIRECTORY_BASE_DEFAULT=${HOME}/src
+WSL_SRC_DIRECTORY_BASE=${WSL_SRC_DIRECTORY_BASE:=${WSL_SRC_DIRECTORY_BASE_DEFAULT}}
+WSL_SRC_DIRECTORY_PREFIX=WSL2-Linux-Kernel-
+WSL_SRC_DIRECTORY=${WSL_SRC_DIRECTORY_PREFIX}${KERNEL_FILE_NAME_STEM}
+WSL_SRC_CONFIG_FILE_NAME=config-${KERNEL_VERSION}
+WSL_SRC_CONFIG_DIRECTORY=Microsoft
+WSL_SRC_CONFIG=${WSL_SRC_CONFIG_DIRECTORY}/${WSL_SRC_CONFIG_FILE_NAME}
+
+# WSL kernel compilation arguments.
+WSL_KERNEL_COMPILE_ARG_PARALLEL="-j $(expr $(nproc) - 1)"
+
+# Additional arguments passed to wget when downloading kernel source.
+# Mostly used for testing.
+WGET_XTRA_ARGS=
+
+if [[ $DEBUG -eq 1 ]]; then
+    echo "DEBUG: KERNEL_VERSION=${KERNEL_VERSION}"
+    echo "DEBUG: KERNEL_FILE_NAME=${KERNEL_FILE_NAME}"
+    echo "DEBUG: KERNEL_URL_FILE=${KERNEL_URL_FILE}"
+    echo "DEBUG: WSL_SRC_DIRECTORY=${WSL_SRC_DIRECTORY}"
+    echo "DEBUG: WSL_SRC_CONFIG_FILE_NAME=${WSL_SRC_CONFIG_FILE_NAME}"
+    echo "DEBUG: WSL_SRC_CONFIG=${WSL_SRC_CONFIG}"
+fi
+
+# Install dependencies for building kernel modules.
+# (see https://github.com/microsoft/WSL2-Linux-Kernel)
+# added bc, python-is-python3
+echo "Installing dependencies for building kernel modules..."
+sudo apt-get update
+sudo apt-get install -y build-essential bc bison flex dwarves kmod libssl-dev libelf-dev python-is-python3 wget
+
+# Download and unpack kernel source.
+echo "Downloading and unpacking kernel source..."
+if [[ ! -d ${WSL_SRC_DIRECTORY_BASE} ]]; then
+    mkdir -p ${WSL_SRC_DIRECTORY_BASE}
+fi
+
+cd ${WSL_SRC_DIRECTORY_BASE}
+wget ${KERNEL_URL_FILE} ${WGET_XTRA_ARGS:+"${WGET_XTRA_ARGS}"} -O - | tar xzvf -
+cd ${WSL_SRC_DIRECTORY}
+
+# Prepare the kernel source with the configuration for the running kernel.
+echo "Preparing kernel source with configuration for running kernel..."
+if [[ ! -f ${WSL_SRC_CONFIG} ]]; then
+    cat /proc/config.gz | gzip -d > ${WSL_SRC_CONFIG}
+fi
+
+if [[ ! -f .config ]]; then
+    ln -s ${WSL_SRC_CONFIG} .config
+fi
+
+# Supply defaults for any new/unspecified options in the configuration.
+make olddefconfig
+
+# Prepare the source tree for building external modules.
+echo "Preparing kernel source tree for building external modules..."
+make prepare modules_prepare ${WSL_KERNEL_COMPILE_ARG_PARALLEL}
+
+# Update the configuration to build the mac80211_hwsim module and its dependencies.
+echo "Updating kernel configuration to build mac80211_hwsim module and its dependencies..."
+${KERNEL_CONFIG_UTIL} \
+    --module CONFIG_RFKILL \
+    --module CONFIG_CFG80211 \
+    --module CONFIG_MAC80211 \
+    --module CONFIG_MAC80211_HWSIM
+
+echo "Building kernel modules..."
+make modules ${WSL_KERNEL_COMPILE_ARG_PARALLEL}
+
+echo "Installing kernel modules..."
+sudo make modules_install
+
+echo "Loading new kernel modules..."
+sudo depmod -a
+
+echo "Done."