Dockerfile.devcontainer

# Dockerfile.devcontainer - Development container with SCTP support
FROM golang:1.25-bookworm

# Install SCTP development libraries and tools
RUN apt-get update && apt-get install -y \
    libsctp-dev \
    lksctp-tools \
    netcat-openbsd \
    iproute2 \
    iputils-ping \
    tcpdump \
    net-tools \
    vim \
    git \
    make \
    build-essential \
    kmod \
    && rm -rf /var/lib/apt/lists/*

# Install Go development tools
RUN go install golang.org/x/tools/gopls@latest && \
    go install github.com/go-delve/delve/cmd/dlv@latest && \
    go install honnef.co/go/tools/cmd/staticcheck@latest && \
    go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest

# Set working directory
WORKDIR /workspace

# Load SCTP kernel module on container startup
# Note: This requires --privileged or --cap-add=SYS_MODULE
RUN echo '#!/bin/bash\n\
set -e\n\
# Load SCTP kernel module\n\
if ! lsmod | grep -q sctp; then\n\
  modprobe sctp 2>/dev/null || echo "Warning: Could not load SCTP module (may already be loaded or unavailable)"\n\
fi\n\
# Verify SCTP support\n\
if [ -f /proc/net/sctp/snmp ]; then\n\
  echo "SCTP support verified: /proc/net/sctp/snmp exists"\n\
else\n\
  echo "Warning: SCTP support may not be available"\n\
fi\n\
exec "$@"\n\
' > /usr/local/bin/docker-entrypoint.sh && \
    chmod +x /usr/local/bin/docker-entrypoint.sh

ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
CMD ["/bin/bash"]