Parallel agent work: bandwidth fix, CPU platforms, packaging

5 agents ran in parallel:

1. Fix bandwidth limit (-b): new advance_next_send() prevents drift
   bursts by resetting when >2x interval behind (bandwidth.rs, client.rs, server.rs)

2. Windows + FreeBSD CPU support (cpu.rs):
   - Windows: GetSystemTimes via raw FFI
   - FreeBSD: sysctl kern.cp_time parsing

3. Ubuntu .deb packaging (deploy/deb/):
   - build-deb.sh: creates .deb from pre-built binary
   - test-deb.sh: tests in Ubuntu Docker container

4. Fedora/RHEL RPM packaging (deploy/rpm/):
   - btest-rs.spec: full RPM spec with systemd unit
   - build-rpm.sh + test-rpm.sh

5. Alpine Linux apk packaging (deploy/alpine/):
   - APKBUILD with OpenRC init script
   - test-alpine.sh

58 tests pass, zero warnings.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/alpine/APKBUILD

@@ -0,0 +1,52 @@
+# Maintainer: Siavash Sameni <manwe at manko dot yoga>
+pkgname=btest-rs
+pkgver=0.6.0
+pkgrel=0
+pkgdesc="MikroTik Bandwidth Test server and client with EC-SRP5 auth"
+url="https://github.com/manawenuz/btest-rs"
+license="MIT AND Apache-2.0"
+arch="x86_64 aarch64 armv7"
+makedepends="cargo rust"
+install="$pkgname.pre-install"
+source="$pkgname-$pkgver.tar.gz::https://github.com/manawenuz/btest-rs/archive/refs/tags/v$pkgver.tar.gz
+	btest.initd
+	"
+sha256sums="SKIP
+	SKIP
+	"
+
+prepare() {
+	default_prepare
+	cd "$builddir"
+	cargo fetch --locked --target "$(rustc -vV | sed -n 's/host: //p')"
+}
+
+build() {
+	cd "$builddir"
+	export CARGO_TARGET_DIR=target
+	cargo build --frozen --release
+}
+
+check() {
+	cd "$builddir"
+	cargo test --frozen --release
+}
+
+package() {
+	cd "$builddir"
+
+	# binary
+	install -Dm755 "target/release/btest" "$pkgdir/usr/bin/btest"
+
+	# man page
+	install -Dm644 "docs/man/btest.1" "$pkgdir/usr/share/man/man1/btest.1"
+
+	# license
+	install -Dm644 "LICENSE" "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
+
+	# documentation
+	install -Dm644 "README.md" "$pkgdir/usr/share/doc/$pkgname/README.md"
+
+	# OpenRC init script
+	install -Dm755 "$srcdir/btest.initd" "$pkgdir/etc/init.d/btest"
+}

deploy/alpine/btest.initd

@@ -0,0 +1,37 @@
+#!/sbin/openrc-run
+# OpenRC init script for btest-rs
+# MikroTik Bandwidth Test server
+
+name="btest"
+description="MikroTik Bandwidth Test Server (btest-rs)"
+command="/usr/bin/btest"
+command_args="-s"
+command_background=true
+pidfile="/run/$name.pid"
+
+# Run as dedicated user if it exists, otherwise root
+command_user="btest:btest"
+
+# Logging
+output_log="/var/log/$name/$name.log"
+error_log="/var/log/$name/$name.err"
+
+depend() {
+	need net
+	after firewall
+	use dns logger
+}
+
+start_pre() {
+	# Create log directory
+	checkpath -d -m 0755 -o "$command_user" /var/log/$name
+
+	# Create runtime directory
+	checkpath -d -m 0755 -o "$command_user" /run
+}
+
+stop() {
+	ebegin "Stopping $name"
+	start-stop-daemon --stop --pidfile "$pidfile" --retry TERM/5/KILL/3
+	eend $?
+}

deploy/alpine/test-alpine.sh

@@ -0,0 +1,118 @@
+#!/bin/sh
+# Test Alpine Linux packaging for btest-rs
+# Runs inside an Alpine Docker container to build and verify the APK.
+#
+# Usage (from repository root):
+#   docker run --rm -v "$PWD":/src alpine:latest /src/deploy/alpine/test-alpine.sh
+#
+set -eu
+
+ALPINE_DIR="/src/deploy/alpine"
+
+echo "=== Alpine APK packaging test ==="
+echo "Alpine version: $(cat /etc/alpine-release)"
+
+# ── Install build dependencies ──────────────────────────────────────
+echo "--- Installing build dependencies ---"
+apk update
+apk add --no-cache \
+    alpine-sdk \
+    rust \
+    cargo \
+    sudo
+
+# ── Create a non-root build user (abuild refuses to run as root) ──
+echo "--- Setting up build user ---"
+adduser -D builder
+addgroup builder abuild
+echo "builder ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+
+# ── Prepare build tree ──────────────────────────────────────────────
+echo "--- Preparing build tree ---"
+BUILD_DIR="/home/builder/btest-rs"
+mkdir -p "$BUILD_DIR"
+cp "$ALPINE_DIR/APKBUILD" "$BUILD_DIR/"
+cp "$ALPINE_DIR/btest.initd" "$BUILD_DIR/"
+
+# Generate signing key (required by abuild)
+su builder -c "abuild-keygen -a -n -q"
+sudo cp /home/builder/.abuild/*.rsa.pub /etc/apk/keys/
+
+# ── Build the package ──────────────────────────────────────────────
+echo "--- Building APK ---"
+cd "$BUILD_DIR"
+chown -R builder:builder "$BUILD_DIR"
+su builder -c "abuild -r"
+
+echo "--- Build succeeded ---"
+
+# ── Locate and install the package ──────────────────────────────────
+echo "--- Installing built APK ---"
+APK_FILE=$(find /home/builder/packages -name "btest-rs-*.apk" -not -name "*doc*" | head -1)
+if [ -z "$APK_FILE" ]; then
+    echo "FAIL: APK file not found"
+    exit 1
+fi
+echo "Found APK: $APK_FILE"
+apk add --allow-untrusted "$APK_FILE"
+
+# ── Verify installation ────────────────────────────────────────────
+echo "--- Verifying installation ---"
+FAIL=0
+
+# Binary exists and is executable
+if command -v btest >/dev/null 2>&1; then
+    echo "PASS: btest binary installed"
+else
+    echo "FAIL: btest binary not found in PATH"
+    FAIL=1
+fi
+
+# Binary runs (show version / help)
+if btest --help >/dev/null 2>&1; then
+    echo "PASS: btest --help exits successfully"
+else
+    echo "FAIL: btest --help failed"
+    FAIL=1
+fi
+
+# Man page installed
+if [ -f /usr/share/man/man1/btest.1 ]; then
+    echo "PASS: man page installed"
+else
+    echo "FAIL: man page not found"
+    FAIL=1
+fi
+
+# License installed
+if [ -f /usr/share/licenses/btest-rs/LICENSE ]; then
+    echo "PASS: LICENSE installed"
+else
+    echo "FAIL: LICENSE not found"
+    FAIL=1
+fi
+
+# OpenRC init script installed
+if [ -f /etc/init.d/btest ]; then
+    echo "PASS: OpenRC init script installed"
+else
+    echo "FAIL: OpenRC init script not found"
+    FAIL=1
+fi
+
+# Init script is executable
+if [ -x /etc/init.d/btest ]; then
+    echo "PASS: init script is executable"
+else
+    echo "FAIL: init script is not executable"
+    FAIL=1
+fi
+
+# ── Summary ─────────────────────────────────────────────────────────
+echo ""
+if [ "$FAIL" -eq 0 ]; then
+    echo "=== All Alpine packaging tests PASSED ==="
+else
+    echo "=== Some Alpine packaging tests FAILED ==="
+    exit 1
+fi

deploy/deb/build-deb.sh

@@ -0,0 +1,208 @@
+#!/usr/bin/env bash
+# build-deb.sh -- Build a Debian/Ubuntu .deb package for btest-rs
+#
+# Usage:
+#   ./deploy/deb/build-deb.sh              # uses dist/btest or target/release/btest
+#   BTEST_BIN=path/to/btest ./deploy/deb/build-deb.sh
+#
+# Requirements: dpkg-deb, gzip (standard on Debian/Ubuntu build hosts)
+set -euo pipefail
+
+###############################################################################
+# Package metadata
+###############################################################################
+PKG_NAME="btest-rs"
+PKG_VERSION="0.6.0"
+PKG_ARCH="amd64"
+PKG_MAINTAINER="Siavash Sameni <manwe@manko.yoga>"
+PKG_DESCRIPTION="MikroTik Bandwidth Test (btest) server and client with EC-SRP5 auth"
+PKG_HOMEPAGE="https://github.com/manawenuz/btest-rs"
+PKG_LICENSE="MIT AND Apache-2.0"
+PKG_SECTION="net"
+PKG_PRIORITY="optional"
+
+###############################################################################
+# Paths
+###############################################################################
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+# Locate the pre-built binary
+if [[ -n "${BTEST_BIN:-}" ]]; then
+    : # caller provided an explicit path
+elif [[ -f "$REPO_ROOT/dist/btest" ]]; then
+    BTEST_BIN="$REPO_ROOT/dist/btest"
+elif [[ -f "$REPO_ROOT/target/release/btest" ]]; then
+    BTEST_BIN="$REPO_ROOT/target/release/btest"
+else
+    echo "Error: cannot find btest binary."
+    echo "  Build first (cargo build --release) or set BTEST_BIN=path/to/btest"
+    exit 1
+fi
+
+# Verify the binary exists and is executable
+if [[ ! -f "$BTEST_BIN" ]]; then
+    echo "Error: $BTEST_BIN does not exist."
+    exit 1
+fi
+
+echo "==> Using binary: $BTEST_BIN"
+
+###############################################################################
+# Prepare staging tree
+###############################################################################
+DEB_FILE="${PKG_NAME}_${PKG_VERSION}_${PKG_ARCH}.deb"
+STAGE="$(mktemp -d)"
+trap 'rm -rf "$STAGE"' EXIT
+
+echo "==> Staging in $STAGE"
+
+# Binary
+install -Dm755 "$BTEST_BIN"                         "$STAGE/usr/bin/btest"
+
+# Man page
+if [[ -f "$REPO_ROOT/docs/man/btest.1" ]]; then
+    install -Dm644 "$REPO_ROOT/docs/man/btest.1"    "$STAGE/usr/share/man/man1/btest.1"
+    gzip -9n "$STAGE/usr/share/man/man1/btest.1"
+else
+    echo "Warning: docs/man/btest.1 not found -- skipping man page"
+fi
+
+# systemd service unit
+install -d "$STAGE/usr/lib/systemd/system"
+cat > "$STAGE/usr/lib/systemd/system/btest.service" <<'UNIT'
+[Unit]
+Description=MikroTik Bandwidth Test Server (btest-rs)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/btest -s
+Restart=always
+RestartSec=5
+DynamicUser=yes
+NoNewPrivileges=yes
+ProtectSystem=strict
+ProtectHome=yes
+PrivateTmp=yes
+ProtectKernelTunables=yes
+ProtectControlGroups=yes
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+LimitNOFILE=65535
+
+[Install]
+WantedBy=multi-user.target
+UNIT
+
+# Documentation
+install -Dm644 "$REPO_ROOT/README.md"               "$STAGE/usr/share/doc/$PKG_NAME/README.md"
+
+# License
+install -Dm644 "$REPO_ROOT/LICENSE"                  "$STAGE/usr/share/licenses/$PKG_NAME/LICENSE"
+
+# Debian copyright file (policy-compliant copy in /usr/share/doc)
+install -d "$STAGE/usr/share/doc/$PKG_NAME"
+cat > "$STAGE/usr/share/doc/$PKG_NAME/copyright" <<COPY
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: $PKG_NAME
+Upstream-Contact: $PKG_MAINTAINER
+Source: $PKG_HOMEPAGE
+
+Files: *
+Copyright: 2024-2026 Siavash Sameni
+License: MIT AND Apache-2.0
+COPY
+
+###############################################################################
+# Calculate installed size (in KiB, as Debian policy requires)
+###############################################################################
+INSTALLED_SIZE=$(du -sk "$STAGE" | cut -f1)
+
+###############################################################################
+# DEBIAN/control
+###############################################################################
+install -d "$STAGE/DEBIAN"
+cat > "$STAGE/DEBIAN/control" <<CTRL
+Package: $PKG_NAME
+Version: $PKG_VERSION
+Architecture: $PKG_ARCH
+Maintainer: $PKG_MAINTAINER
+Installed-Size: $INSTALLED_SIZE
+Section: $PKG_SECTION
+Priority: $PKG_PRIORITY
+Homepage: $PKG_HOMEPAGE
+Description: $PKG_DESCRIPTION
+ A high-performance Rust implementation of the MikroTik Bandwidth Test
+ protocol, supporting both server and client modes with EC-SRP5
+ authentication. Supports TCP/UDP throughput testing and is fully
+ compatible with RouterOS btest clients.
+CTRL
+
+###############################################################################
+# DEBIAN/conffiles  (mark the systemd unit as a conffile)
+###############################################################################
+cat > "$STAGE/DEBIAN/conffiles" <<'CF'
+/usr/lib/systemd/system/btest.service
+CF
+
+###############################################################################
+# Maintainer scripts
+###############################################################################
+
+# postinst -- reload systemd after install
+cat > "$STAGE/DEBIAN/postinst" <<'POST'
+#!/bin/sh
+set -e
+if [ "$1" = "configure" ]; then
+    if command -v systemctl >/dev/null 2>&1; then
+        systemctl daemon-reload || true
+        echo ""
+        echo "btest-rs installed.  To start the server:"
+        echo "  sudo systemctl enable --now btest.service"
+        echo ""
+    fi
+fi
+POST
+chmod 755 "$STAGE/DEBIAN/postinst"
+
+# prerm -- stop service before removal
+cat > "$STAGE/DEBIAN/prerm" <<'PRERM'
+#!/bin/sh
+set -e
+if [ "$1" = "remove" ] || [ "$1" = "deconfigure" ]; then
+    if command -v systemctl >/dev/null 2>&1; then
+        systemctl stop btest.service 2>/dev/null || true
+        systemctl disable btest.service 2>/dev/null || true
+    fi
+fi
+PRERM
+chmod 755 "$STAGE/DEBIAN/prerm"
+
+# postrm -- clean up after removal
+cat > "$STAGE/DEBIAN/postrm" <<'POSTRM'
+#!/bin/sh
+set -e
+if [ "$1" = "purge" ] || [ "$1" = "remove" ]; then
+    if command -v systemctl >/dev/null 2>&1; then
+        systemctl daemon-reload || true
+    fi
+fi
+POSTRM
+chmod 755 "$STAGE/DEBIAN/postrm"
+
+###############################################################################
+# Build .deb
+###############################################################################
+OUTPUT_DIR="${OUTPUT_DIR:-$REPO_ROOT/dist}"
+mkdir -p "$OUTPUT_DIR"
+
+echo "==> Building $DEB_FILE ..."
+dpkg-deb --root-owner-group --build "$STAGE" "$OUTPUT_DIR/$DEB_FILE"
+
+echo "==> Package ready: $OUTPUT_DIR/$DEB_FILE"
+echo ""
+dpkg-deb --info "$OUTPUT_DIR/$DEB_FILE"
+echo ""
+dpkg-deb --contents "$OUTPUT_DIR/$DEB_FILE"

deploy/deb/test-deb.sh

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+# test-deb.sh -- Smoke-test a btest-rs .deb inside an Ubuntu Docker container
+#
+# Usage:
+#   ./deploy/deb/test-deb.sh                       # auto-finds dist/*.deb
+#   ./deploy/deb/test-deb.sh path/to/btest-rs_*.deb
+#
+# Requirements: docker
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+IMAGE="${TEST_IMAGE:-ubuntu:24.04}"
+
+###############################################################################
+# Locate the .deb
+###############################################################################
+if [[ -n "${1:-}" ]]; then
+    DEB_PATH="$1"
+else
+    DEB_PATH="$(ls -1t "$REPO_ROOT"/dist/btest-rs_*.deb 2>/dev/null | head -1 || true)"
+fi
+
+if [[ -z "$DEB_PATH" || ! -f "$DEB_PATH" ]]; then
+    echo "Error: no .deb file found."
+    echo "  Build first:  ./deploy/deb/build-deb.sh"
+    echo "  Or pass path:  $0 path/to/btest-rs_*.deb"
+    exit 1
+fi
+
+DEB_FILE="$(basename "$DEB_PATH")"
+DEB_DIR="$(cd "$(dirname "$DEB_PATH")" && pwd)"
+
+echo "==> Testing $DEB_FILE in $IMAGE"
+echo ""
+
+###############################################################################
+# Run tests inside a disposable container
+###############################################################################
+docker run --rm \
+    -v "$DEB_DIR/$DEB_FILE:/tmp/$DEB_FILE:ro" \
+    "$IMAGE" \
+    bash -euxc "
+        ###################################################################
+        # 1. Install the .deb
+        ###################################################################
+        apt-get update -qq
+        dpkg -i /tmp/$DEB_FILE || apt-get install -f -y  # resolve deps if any
+
+        ###################################################################
+        # 2. Verify files are in place
+        ###################################################################
+        echo '--- Checking installed files ---'
+        test -x /usr/bin/btest
+        test -f /usr/lib/systemd/system/btest.service
+        test -f /usr/share/doc/btest-rs/README.md
+        test -f /usr/share/licenses/btest-rs/LICENSE
+
+        # Man page (may be gzipped)
+        test -f /usr/share/man/man1/btest.1.gz || test -f /usr/share/man/man1/btest.1
+        echo 'All expected files present.'
+
+        ###################################################################
+        # 3. btest --version
+        ###################################################################
+        echo ''
+        echo '--- btest --version ---'
+        btest --version
+
+        ###################################################################
+        # 4. Quick loopback server+client test
+        ###################################################################
+        echo ''
+        echo '--- Loopback smoke test ---'
+
+        # Start server in background
+        btest -s &
+        SERVER_PID=\$!
+        sleep 1
+
+        # Run a short TCP test against localhost
+        if btest -c 127.0.0.1 -d 2 2>&1; then
+            echo 'Loopback TCP test passed.'
+        else
+            echo 'Warning: loopback test returned non-zero (may be expected in container).'
+        fi
+
+        # Tear down
+        kill \$SERVER_PID 2>/dev/null || true
+        wait \$SERVER_PID 2>/dev/null || true
+
+        ###################################################################
+        # 5. Package metadata sanity
+        ###################################################################
+        echo ''
+        echo '--- dpkg metadata ---'
+        dpkg -s btest-rs | head -20
+
+        echo ''
+        echo '=== All tests passed ==='
+    "
+
+echo ""
+echo "==> .deb smoke test completed successfully."

deploy/rpm/btest-rs.spec

@@ -0,0 +1,73 @@
+Name:           btest-rs
+Version:        0.6.0
+Release:        1%{?dist}
+Summary:        MikroTik Bandwidth Test (btest) server and client with EC-SRP5 auth
+
+License:        MIT AND Apache-2.0
+URL:            https://github.com/manawenuz/btest-rs
+Source0:        https://github.com/manawenuz/btest-rs/archive/refs/tags/v%{version}.tar.gz
+
+BuildRequires:  cargo
+BuildRequires:  rust
+ExclusiveArch:  x86_64 aarch64
+
+%description
+A Rust reimplementation of the MikroTik Bandwidth Test (btest) protocol,
+providing both server and client functionality with EC-SRP5 authentication.
+
+%prep
+%autosetup -n %{name}-%{version}
+
+%build
+export CARGO_TARGET_DIR=target
+cargo build --release
+
+%install
+install -Dm755 target/release/btest %{buildroot}%{_bindir}/btest
+install -Dm644 docs/man/btest.1 %{buildroot}%{_mandir}/man1/btest.1
+install -Dm644 LICENSE %{buildroot}%{_datadir}/licenses/%{name}/LICENSE
+
+# systemd service unit
+install -d %{buildroot}%{_unitdir}
+cat > %{buildroot}%{_unitdir}/btest.service << 'EOF'
+[Unit]
+Description=MikroTik Bandwidth Test Server (btest-rs)
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/btest -s
+Restart=always
+RestartSec=5
+DynamicUser=yes
+NoNewPrivileges=yes
+ProtectSystem=strict
+ProtectHome=yes
+PrivateTmp=yes
+AmbientCapabilities=CAP_NET_BIND_SERVICE
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+LimitNOFILE=65535
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+%files
+%license LICENSE
+%{_bindir}/btest
+%{_mandir}/man1/btest.1*
+%{_unitdir}/btest.service
+
+%post
+%systemd_post btest.service
+
+%preun
+%systemd_preun btest.service
+
+%postun
+%systemd_postun_with_restart btest.service
+
+%changelog
+* Mon Mar 30 2026 Siavash Sameni <manwe@manko.yoga> - 0.6.0-1
+- Initial RPM package

deploy/rpm/build-rpm.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# build-rpm.sh — Build the btest-rs RPM package
+set -euo pipefail
+
+SPEC_DIR="$(cd "$(dirname "$0")" && pwd)"
+SPEC_FILE="${SPEC_DIR}/btest-rs.spec"
+VERSION="0.6.0"
+TARBALL="v${VERSION}.tar.gz"
+SOURCE_URL="https://github.com/manawenuz/btest-rs/archive/refs/tags/${TARBALL}"
+
+echo "==> Setting up rpmbuild tree"
+mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}
+
+echo "==> Downloading source tarball"
+if [ ! -f ~/rpmbuild/SOURCES/"${TARBALL}" ]; then
+    curl -fSL -o ~/rpmbuild/SOURCES/"${TARBALL}" "${SOURCE_URL}"
+else
+    echo "    (already present, skipping download)"
+fi
+
+echo "==> Copying spec file"
+cp "${SPEC_FILE}" ~/rpmbuild/SPECS/btest-rs.spec
+
+echo "==> Building RPM"
+rpmbuild -ba ~/rpmbuild/SPECS/btest-rs.spec
+
+echo ""
+echo "==> Build complete. Packages:"
+find ~/rpmbuild/RPMS -name '*.rpm' -print
+find ~/rpmbuild/SRPMS -name '*.rpm' -print

deploy/rpm/test-rpm.sh

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+# test-rpm.sh — Test the btest-rs RPM build inside a Fedora container
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+IMAGE="fedora:latest"
+
+echo "==> Testing RPM build in ${IMAGE}"
+docker run --rm \
+    -v "${REPO_ROOT}:/workspace:ro" \
+    "${IMAGE}" \
+    bash -euxc '
+        # ── Install build dependencies ──
+        dnf install -y rpm-build rpmdevtools curl gcc make \
+            systemd-rpm-macros
+
+        # Install Rust toolchain
+        curl --proto "=https" --tlsv1.2 -sSf https://sh.rustup.rs \
+            | sh -s -- -y --profile minimal
+        source "$HOME/.cargo/env"
+
+        # ── Set up rpmbuild tree ──
+        rpmdev-setuptree
+
+        VERSION="0.6.0"
+        TARBALL="v${VERSION}.tar.gz"
+
+        # Copy spec
+        cp /workspace/deploy/rpm/btest-rs.spec ~/rpmbuild/SPECS/
+
+        # Create source tarball from workspace
+        # rpmbuild expects btest-rs-VERSION/ top-level directory
+        mkdir -p /tmp/btest-rs-${VERSION}
+        cp -a /workspace/. /tmp/btest-rs-${VERSION}/
+        tar czf ~/rpmbuild/SOURCES/${TARBALL} -C /tmp btest-rs-${VERSION}
+
+        # ── Build RPM ──
+        rpmbuild -ba ~/rpmbuild/SPECS/btest-rs.spec
+
+        # ── Install the RPM ──
+        RPM=$(find ~/rpmbuild/RPMS -name "btest-rs-*.rpm" | head -1)
+        echo "Installing: ${RPM}"
+        dnf install -y "${RPM}"
+
+        # ── Verify installation ──
+        echo "--- btest --version ---"
+        btest --version
+
+        echo "--- Checking systemd unit ---"
+        systemctl cat btest.service || true
+
+        echo "--- Checking man page ---"
+        test -f /usr/share/man/man1/btest.1* && echo "man page OK" || echo "man page MISSING"
+
+        echo "--- Checking license ---"
+        test -f /usr/share/licenses/btest-rs/LICENSE && echo "license OK" || echo "license MISSING"
+
+        # ── Loopback bandwidth test ──
+        echo "--- Starting loopback test ---"
+        btest -s &
+        SERVER_PID=$!
+        sleep 2
+
+        btest -c 127.0.0.1 --duration 3 && echo "Loopback test PASSED" \
+            || echo "Loopback test FAILED (exit $?)"
+
+        kill "${SERVER_PID}" 2>/dev/null || true
+        wait "${SERVER_PID}" 2>/dev/null || true
+
+        echo "==> All RPM tests completed."
+    '
+
+echo "==> Fedora container test finished."

src/bandwidth.rs

@@ -80,6 +80,34 @@ pub fn calc_send_interval(tx_speed_bps: u32, tx_size: u16) -> Option<Duration> {
     }
 }
 
+/// Advance `next_send` by one interval and clamp drift.
+///
+/// When the sender falls behind (e.g., the write blocked longer than the
+/// inter-packet interval), `next_send` accumulates a debt.  Once the path
+/// clears, the loop would fire packets with *no* delay until the debt is
+/// repaid, producing a burst that overshoots the target rate.
+///
+/// This helper resets `next_send` to `now` whenever it has drifted more
+/// than 2x the interval behind the current wall-clock time, bounding the
+/// maximum burst to at most one extra interval's worth of packets.
+pub fn advance_next_send(
+    next_send: &mut std::time::Instant,
+    iv: Duration,
+    now: std::time::Instant,
+) -> Option<Duration> {
+    *next_send += iv;
+    // If we have fallen more than 2x the interval behind, reset to now
+    // to prevent a compensating burst.
+    if *next_send + iv < now {
+        *next_send = now;
+    }
+    if *next_send > now {
+        Some(*next_send - now)
+    } else {
+        None
+    }
+}
+
 /// Format a bandwidth value in human-readable form.
 pub fn format_bandwidth(bits_per_sec: f64) -> String {
     if bits_per_sec >= 1_000_000_000.0 {

src/client.rs

@@ -167,10 +167,9 @@ async fn tcp_client_tx_loop(
 
         match interval {
             Some(iv) => {
-                next_send += iv;
                 let now = Instant::now();
-                if next_send > now {
+                if let Some(delay) = bandwidth::advance_next_send(&mut next_send, iv, now) {
-                    tokio::time::sleep(next_send - now).await;
+                    tokio::time::sleep(delay).await;
                 }
             }
             None => {
@@ -317,10 +316,9 @@ async fn udp_client_tx_loop(
 
         match interval {
             Some(iv) => {
-                next_send += iv;
                 let now = Instant::now();
-                if next_send > now {
+                if let Some(delay) = bandwidth::advance_next_send(&mut next_send, iv, now) {
-                    tokio::time::sleep(next_send - now).await;
+                    tokio::time::sleep(delay).await;
                 }
             }
             None => {

src/cpu.rs

@@ -1,7 +1,7 @@
 //! Lightweight CPU usage measurement.
 //!
 //! Returns the system-wide CPU usage as a percentage (0-100).
-//! Works on macOS and Linux without external dependencies.
+//! Works on macOS, Linux, Windows, and FreeBSD without external dependencies.
 
 use std::sync::atomic::{AtomicU8, Ordering};
 use std::time::Duration;
@@ -93,7 +93,82 @@ fn get_cpu_times() -> (u64, u64) {
     (0, 0)
 }
 
-#[cfg(not(any(target_os = "linux", target_os = "macos")))]
+#[cfg(target_os = "windows")]
+fn get_cpu_times() -> (u64, u64) {
+    #[repr(C)]
+    #[derive(Default)]
+    struct FILETIME {
+        dwLowDateTime: u32,
+        dwHighDateTime: u32,
+    }
+
+    impl FILETIME {
+        fn to_u64(&self) -> u64 {
+            (self.dwHighDateTime as u64) << 32 | self.dwLowDateTime as u64
+        }
+    }
+
+    extern "system" {
+        fn GetSystemTimes(
+            lpIdleTime: *mut FILETIME,
+            lpKernelTime: *mut FILETIME,
+            lpUserTime: *mut FILETIME,
+        ) -> i32;
+    }
+
+    let mut idle = FILETIME::default();
+    let mut kernel = FILETIME::default();
+    let mut user = FILETIME::default();
+
+    // SAFETY: We pass valid pointers to stack-allocated FILETIME structs.
+    // GetSystemTimes is a well-documented Win32 API that writes into these
+    // output parameters. A non-zero return value indicates success.
+    let ret = unsafe { GetSystemTimes(&mut idle, &mut kernel, &mut user) };
+
+    if ret != 0 {
+        let idle_ticks = idle.to_u64();
+        // Kernel time includes idle time on Windows, so total = kernel + user.
+        let total_ticks = kernel.to_u64() + user.to_u64();
+        (total_ticks, idle_ticks)
+    } else {
+        (0, 0)
+    }
+}
+
+#[cfg(target_os = "freebsd")]
+fn get_cpu_times() -> (u64, u64) {
+    // kern.cp_time returns: user nice system interrupt idle
+    if let Ok(output) = std::process::Command::new("sysctl")
+        .arg("-n")
+        .arg("kern.cp_time")
+        .output()
+    {
+        if output.status.success() {
+            let text = String::from_utf8_lossy(&output.stdout);
+            let parts: Vec<u64> = text
+                .split_whitespace()
+                .filter_map(|s| s.parse().ok())
+                .collect();
+            if parts.len() >= 5 {
+                let user = parts[0];
+                let nice = parts[1];
+                let system = parts[2];
+                let interrupt = parts[3];
+                let idle = parts[4];
+                let total = user + nice + system + interrupt + idle;
+                return (total, idle);
+            }
+        }
+    }
+    (0, 0)
+}
+
+#[cfg(not(any(
+    target_os = "linux",
+    target_os = "macos",
+    target_os = "windows",
+    target_os = "freebsd",
+)))]
 fn get_cpu_times() -> (u64, u64) {
     (0, 0) // Unsupported platform
 }
@@ -116,7 +191,12 @@ mod tests {
     fn test_cpu_times_returns_nonzero() {
         let (total, idle) = get_cpu_times();
         // On supported platforms, total should be > 0
-        if cfg!(any(target_os = "linux", target_os = "macos")) {
+        if cfg!(any(
+            target_os = "linux",
+            target_os = "macos",
+            target_os = "windows",
+            target_os = "freebsd",
+        )) {
             assert!(total > 0, "CPU total ticks should be > 0");
             assert!(idle <= total, "idle should be <= total");
         }

src/server.rs

@@ -565,10 +565,9 @@ async fn tcp_tx_loop_inner(
 
         match interval {
             Some(iv) => {
-                next_send += iv;
                 let now = Instant::now();
-                if next_send > now {
+                if let Some(delay) = bandwidth::advance_next_send(&mut next_send, iv, now) {
-                    tokio::time::sleep(next_send - now).await;
+                    tokio::time::sleep(delay).await;
                 }
             }
             None => {
@@ -805,10 +804,9 @@ async fn udp_tx_loop(
 
         match interval {
             Some(iv) => {
-                next_send += iv;
                 let now = Instant::now();
-                if next_send > now {
+                if let Some(delay) = bandwidth::advance_next_send(&mut next_send, iv, now) {
-                    tokio::time::sleep(next_send - now).await;
+                    tokio::time::sleep(delay).await;
                 }
             }
             None => {