wireshark.sh

#!/bin/bash
set -euo pipefail

script_directory_path="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
script_path="$script_directory_path/$(basename "${BASH_SOURCE[0]}")"

container_name="${1:-quotes}"; shift || true
container_id="$(docker compose ps --no-trunc --format '{{.ID}}' "$container_name")"
container_br="br-$(docker inspect --format '{{range .NetworkSettings.Networks}}{{.NetworkID}}{{end}}' "$container_id" | cut -c1-12)"
container_mac="$(docker inspect --format '{{range .NetworkSettings.Networks}}{{.MacAddress}}{{end}}' "$container_id")"

# download the otlp protobuf files.
otlp_version='1.1.0'
otlp_path="$PWD/tmp/opentelemetry-proto-$otlp_version"
if [ ! -d "$otlp_path/opentelemetry/proto" ]; then
    otlp_parent_path="$(dirname "$otlp_path")"
    install -d "$otlp_parent_path"
    wget -qO- "https://github.com/open-telemetry/opentelemetry-proto/archive/refs/tags/v$otlp_version.tar.gz" \
        | tar xzf - -C "$otlp_parent_path"
fi

# configure the wireshark proto search path.
# TODO instead of always overriding the file, modify it in-place when required.
# see https://wiki.wireshark.org/gRPC
# see https://wiki.wireshark.org/Protobuf
# see https://github.com/open-telemetry/opentelemetry-proto/tree/main/opentelemetry/proto
# NB wireshark searches for proto files at the directories configured in the
#    ~/.config/wireshark/protobuf_search_paths file.
# NB wireshark preferences are loaded from the ~/.config/wireshark/preferences
#    file.
cat >~/.config/wireshark/protobuf_search_paths <<EOF
# This file is automatically generated, DO NOT MODIFY.
# Generated by $script_path.
"$otlp_path","TRUE"
EOF

# call wireshark.
exec wireshark \
    -o "gui.window_title:$container_name" \
    -k \
    -d 'tcp.port==4317,http2' \
    -i "$container_br" \
    -f "ether host $container_mac"