commit a221870b70459b05dba6c2ff10d5f2ff6ef8fa2b
Author: Dongho Kim <dongho@Donghos-MacBook-Pro.local>
Date:   Sun May 17 16:33:43 2026 +0200

    first

diff --git a/README.md b/README.md
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+# Drone MP-QUIC Measurement Testbed
+
+This testbed is designed to measure highly reliable (99.999%), ultra-low latency MP-QUIC communication between a Drone and a Ground Station over heterogeneous links (5G, Satellite, Mesh).
+
+## 1. Deployment Guide
+
+The testbed is split into two independent deployable units.
+
+### Prerequisites
+- **Go 1.20+**: To build the client and server applications.
+- **Python 3.x**: With `pandas`, `matplotlib`, and `seaborn` installed for analysis.
+- **Linux (Optional)**: If you wish to run the eBPF kernel tracing, you must be on a Linux machine with `bcc` installed and run the scripts as `root`.
+
+### Running the Ground Station (Server)
+Deploy the `server/` directory to the Ground Station machine.
+```bash
+# This automatically builds the Go code and starts listening on port 4242.
+# It logs the application-level delivery metrics (packet loss, latency) to ground_metrics.csv
+./server/scripts/run.sh --addr 0.0.0.0:4242 --output ground_metrics.csv
+```
+
+### Running the Drone (Client)
+Deploy the `client/` directory to the Drone machine.
+```bash
+# Blasts framed payloads to the ground station.
+# You can specify the scheduler, the duration in seconds, and the payload size in bytes.
+./client/scripts/run.sh \
+    --addr <GROUND_STATION_IP>:4242 \
+    --scheduler minrtt \
+    --duration 30 \
+    --payload-size 2048
+```
+
+### Analyzing the Results
+Once the test finishes, copy `ground_metrics.csv` to your laptop and run:
+```bash
+pip install pandas matplotlib seaborn
+python3 analysis/visualize.py --app ground_metrics.csv
+```
+This will print your exact **Reliability %** to the terminal and generate scatter plots of the jitter and glass-to-glass latency.
+
+---
+
+## 2. Developer Guide: Adding Custom Algorithms
+
+This testbed is designed to be highly modular so you can test custom Path Schedulers and Congestion Control algorithms.
+
+### How to Add a Custom Path Scheduler
+
+Path Schedulers dictate *which* link (5G, Mesh, Satellite) a packet should be sent over. The testbed uses a dynamic registry, meaning you never have to modify `client/main.go` to add a new scheduler.
+
+1. Navigate to the `client/scheduler/` directory.
+2. Copy the template file: `cp custom_example.go my_scheduler.go`.
+3. Open `my_scheduler.go` and implement the `quic.PathScheduler` interface, which requires three methods:
+   - `SelectPath(...)`: Contains your custom logic to choose a path.
+   - `UpdateQuota(...)`: Tracks how much data was sent.
+   - `Reset()`: Resets your internal metrics.
+4. At the bottom of `my_scheduler.go`, update the `init()` function to register your new scheduler:
+   ```go
+   func init() {
+       Register("my_custom_algo", func() quic.PathScheduler {
+           return &MyScheduler{}
+       })
+   }
+   ```
+5. Run `./client/scripts/run.sh --list-schedulers` and you will see `my_custom_algo` automatically available!
+
+### How to Add Custom Congestion Control
+
+Unlike Schedulers, **Congestion Control (CC) algorithms are deeply embedded inside the `mp-quic-go` library**. The library currently supports `CUBIC` and `OLIA`. 
+
+To write a completely new CC algorithm, you must modify the library itself. Here is the easiest workflow:
+
+**Step 1: Fork the Library Locally**
+Clone the underlying library to your machine:
+```bash
+cd ~
+git clone https://github.com/AeonDave/mp-quic-go.git
+```
+
+**Step 2: Tell Go to use your Local Copy**
+In this `drone` project, tell Go to use your local copy instead of downloading it from Github:
+```bash
+cd drone
+go mod edit -replace github.com/AeonDave/mp-quic-go=/path/to/your/local/mp-quic-go
+go mod tidy
+```
+
+**Step 3: Write your CC Algorithm**
+Open your local `mp-quic-go` code and implement the `congestion.SendAlgorithm` interface. 
+You can look at `internal/congestion/cubic_sender.go` inside the library as a template.
+
+**Step 4: Wire it into the Multipath Controller**
+Inside the library, open `multipath_controller.go`. You will need to modify the `MultipathController` to instantiate your new CC algorithm for new paths, similar to how it currently enables OLIA when `EnableOLIA()` is called.
+
+Once your custom library modifications are done, you simply run `./client/scripts/run.sh` inside the `drone` directory, and Go will automatically compile your local, modified library into the drone client!
diff --git a/__pycache__/run_experiment.cpython-314.pyc b/__pycache__/run_experiment.cpython-314.pyc
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diff --git a/analysis/visualize.py b/analysis/visualize.py
new file mode 100755
index 0000000..f4e0a0d
--- /dev/null
+++ b/analysis/visualize.py
@@ -0,0 +1,144 @@
+#!/usr/bin/env python3
+"""MP-QUIC Application & eBPF Results Visualizer.
+
+This script takes the CSV outputs and plots their latency distributions and timelines.
+
+Usage:
+    python visualize.py --app ../server/app_metrics.csv
+    python visualize.py --client ../results/client.csv --server ../results/server.csv
+"""
+
+import argparse
+import pandas as pd
+import matplotlib.pyplot as plt
+import seaborn as sns
+import os
+
+def load_ebpf_data(csv_path, label):
+    if not os.path.exists(csv_path):
+        print(f"Warning: File {csv_path} not found.")
+        return pd.DataFrame()
+    
+    df = pd.read_csv(csv_path)
+    df['node'] = label
+    df = df.sort_values('timestamp')
+    if not df.empty:
+        first_event_time = df['timestamp'].iloc[0]
+        df['rel_time'] = df['timestamp'] - first_event_time
+    else:
+        df['rel_time'] = 0.0
+    df['value_us'] = df['value_ns'] / 1000.0
+    return df
+
+def plot_app_metrics(csv_path, output_dir):
+    """Plot Application-Level Metrics (Drone -> Ground Station)."""
+    if not os.path.exists(csv_path):
+        print(f"App metrics file {csv_path} not found.")
+        return
+
+    df = pd.read_csv(csv_path)
+    if df.empty:
+        print("App metrics file is empty.")
+        return
+
+    df = df.sort_values('sequence_number')
+    
+    # Calculate Jitter and Rel Latency
+    df['latency_ms'] = df['latency_ns'] / 1000000.0
+    
+    # Relative time from first packet received
+    df['rel_time'] = (df['ground_recv_time'] - df['ground_recv_time'].min()) / 1e9
+
+    plt.figure(figsize=(10, 5))
+    sns.scatterplot(x='rel_time', y='latency_ms', data=df, s=15, alpha=0.6)
+    plt.title('App-Level End-to-End Latency Over Time (Glass-to-Glass)')
+    plt.ylabel('Relative Latency (ms)')
+    plt.xlabel('Time (s)')
+    out_path = os.path.join(output_dir, 'app_latency_timeline.png')
+    plt.savefig(out_path, dpi=300, bbox_inches='tight')
+    plt.close()
+    
+    # Packet Loss Calculation
+    max_seq = df['sequence_number'].max()
+    min_seq = df['sequence_number'].min()
+    expected_packets = max_seq - min_seq + 1
+    received_packets = len(df)
+    lost_packets = expected_packets - received_packets
+    reliability = (received_packets / expected_packets) * 100 if expected_packets > 0 else 0
+
+    print("\n" + "=" * 55)
+    print("  🏆 APP-LEVEL RELIABILITY (Drone -> Ground)")
+    print("=" * 55)
+    print(f"  Packets Sent (Expected): {expected_packets}")
+    print(f"  Packets Received:        {received_packets}")
+    print(f"  Packets Lost:            {lost_packets}")
+    print(f"  Reliability:             {reliability:.5f}%")
+    print("=" * 55)
+    
+    print(f"Saved app-level plot to {out_path}")
+
+
+def plot_latency_distributions(df, output_dir):
+    latency_df = df[df['event_type'].isin(['SEND_LATENCY', 'RECV_LATENCY'])]
+    if latency_df.empty: return
+
+    plt.figure(figsize=(10, 6))
+    sns.violinplot(x='event_type', y='value_us', hue='node', data=latency_df, split=True, inner="quartile")
+    plt.yscale('log')
+    plt.title('Kernel Network Stack Latency Distribution (Log Scale)')
+    plt.ylabel('Latency (µs)')
+    plt.xlabel('Event Type')
+    
+    out_path = os.path.join(output_dir, 'kernel_latency_distribution.png')
+    plt.savefig(out_path, dpi=300, bbox_inches='tight')
+    plt.close()
+    print(f"Saved kernel distribution plot to {out_path}")
+
+def plot_latency_timeline(df, output_dir):
+    latency_df = df[df['event_type'].isin(['SEND_LATENCY', 'RECV_LATENCY'])]
+    if latency_df.empty: return
+
+    g = sns.FacetGrid(latency_df, col="event_type", row="node", margin_titles=True, height=4, aspect=2)
+    g.map(sns.scatterplot, "rel_time", "value_us", alpha=0.5, s=10)
+    g.set_axis_labels("Time (s)", "Latency (µs)")
+    g.set_titles(col_template="{col_name}", row_template="{row_name}")
+    
+    for ax in g.axes.flat:
+        ax.set_yscale('log')
+        
+    g.fig.suptitle('Kernel Latency Over Time', y=1.02)
+    
+    out_path = os.path.join(output_dir, 'kernel_latency_timeline.png')
+    plt.savefig(out_path, dpi=300, bbox_inches='tight')
+    plt.close()
+    print(f"Saved kernel timeline plot to {out_path}")
+
+def main():
+    parser = argparse.ArgumentParser(description="Visualize MP-QUIC data")
+    parser.add_argument("--client", help="Path to client eBPF CSV file")
+    parser.add_argument("--server", help="Path to server eBPF CSV file")
+    parser.add_argument("--app", help="Path to App-Level metrics CSV file (e.g. app_metrics.csv)")
+    parser.add_argument("--outdir", default="plots", help="Directory to save plots")
+    args = parser.parse_args()
+
+    os.makedirs(args.outdir, exist_ok=True)
+
+    if args.app:
+        plot_app_metrics(args.app, args.outdir)
+
+    dfs = []
+    if args.client:
+        dfs.append(load_ebpf_data(args.client, "Client"))
+    if args.server:
+        dfs.append(load_ebpf_data(args.server, "Server"))
+        
+    if dfs:
+        df = pd.concat(dfs, ignore_index=True)
+        sns.set_theme(style="whitegrid")
+        plot_latency_distributions(df, args.outdir)
+        plot_latency_timeline(df, args.outdir)
+        
+    print("\nVisualization complete! Check the '{}' directory.".format(args.outdir))
+
+if __name__ == "__main__":
+    main()
diff --git a/bin/client b/bin/client
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diff --git a/bin/server b/bin/server
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diff --git a/client/ebpf/measure.py b/client/ebpf/measure.py
new file mode 100644
index 0000000..5558a17
--- /dev/null
+++ b/client/ebpf/measure.py
@@ -0,0 +1,191 @@
+#!/usr/bin/env python3
+"""eBPF-based UDP tracer for MP-QUIC performance measurement.
+
+Traces kernel-level UDP send/receive latency and packet drops.
+Requires root privileges and Linux with BCC installed.
+"""
+
+from bcc import BPF
+import time
+import argparse
+import signal
+import sys
+
+bpf_text = """
+#include <uapi/linux/ptrace.h>
+#include <net/sock.h>
+#include <net/inet_sock.h>
+#include <bcc/proto.h>
+
+#define MPQUIC_PORT __TARGET_PORT__
+
+BPF_HASH(send_start, u32, u64);
+BPF_HASH(recv_start, u32, u64);
+
+BPF_PERF_OUTPUT(events);
+
+struct event_t {
+    u64 timestamp_ns;
+    u64 delta_ns;
+    u32 pid;
+    u16 sport;
+    u16 dport;
+    u8  event_type;  // 0=SEND, 1=RECV, 2=DROP
+};
+
+int trace_udp_sendmsg(struct pt_regs *ctx, struct sock *sk) {
+    struct inet_sock *inet = (struct inet_sock *)sk;
+    u16 dport = 0;
+    bpf_probe_read_kernel(&dport, sizeof(dport), &inet->inet_dport);
+    dport = ntohs(dport);
+
+    // Filter: only trace traffic to/from MP-QUIC port
+    u16 sport = 0;
+    bpf_probe_read_kernel(&sport, sizeof(sport), &inet->inet_sport);
+    sport = ntohs(sport);
+
+    if (dport != MPQUIC_PORT && sport != MPQUIC_PORT)
+        return 0;
+
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 ts = bpf_ktime_get_ns();
+    send_start.update(&pid, &ts);
+    return 0;
+}
+
+int trace_udp_sendmsg_ret(struct pt_regs *ctx) {
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 *tsp = send_start.lookup(&pid);
+    if (tsp == 0)
+        return 0;
+
+    u64 delta = bpf_ktime_get_ns() - *tsp;
+    send_start.delete(&pid);
+
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = delta;
+    event.pid = pid;
+    event.event_type = 0;  // SEND
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+
+int trace_udp_recvmsg(struct pt_regs *ctx, struct sock *sk) {
+    struct inet_sock *inet = (struct inet_sock *)sk;
+    u16 sport = 0;
+    bpf_probe_read_kernel(&sport, sizeof(sport), &inet->inet_sport);
+    sport = ntohs(sport);
+
+    u16 dport = 0;
+    bpf_probe_read_kernel(&dport, sizeof(dport), &inet->inet_dport);
+    dport = ntohs(dport);
+
+    if (sport != MPQUIC_PORT && dport != MPQUIC_PORT)
+        return 0;
+
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 ts = bpf_ktime_get_ns();
+    recv_start.update(&pid, &ts);
+    return 0;
+}
+
+int trace_udp_recvmsg_ret(struct pt_regs *ctx) {
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 *tsp = recv_start.lookup(&pid);
+    if (tsp == 0)
+        return 0;
+
+    u64 delta = bpf_ktime_get_ns() - *tsp;
+    recv_start.delete(&pid);
+
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = delta;
+    event.pid = pid;
+    event.event_type = 1;  // RECV
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+
+TRACEPOINT_PROBE(skb, kfree_skb) {
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = 0;
+    event.pid = bpf_get_current_pid_tgid();
+    event.event_type = 2;  // DROP
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+"""
+
+EVENT_TYPES = {0: "SEND_LATENCY", 1: "RECV_LATENCY", 2: "DROP"}
+
+# Counters for live summary
+stats = {"send_count": 0, "recv_count": 0, "drop_count": 0,
+         "send_total_ns": 0, "recv_total_ns": 0}
+
+
+def main():
+    parser = argparse.ArgumentParser(description="eBPF UDP Tracer for MP-QUIC")
+    parser.add_argument("--output", type=str, default="measurement.csv",
+                        help="CSV output file")
+    parser.add_argument("--port", type=int, default=4242,
+                        help="MP-QUIC port to filter on")
+    args = parser.parse_args()
+
+    program = bpf_text.replace("__TARGET_PORT__", str(args.port))
+
+    print(f"Compiling eBPF program (requires root)...")
+    print(f"Filtering on UDP port {args.port}")
+    b = BPF(text=program)
+
+    # Attach kprobes for send and receive paths
+    b.attach_kprobe(event="udp_sendmsg", fn_name="trace_udp_sendmsg")
+    b.attach_kretprobe(event="udp_sendmsg", fn_name="trace_udp_sendmsg_ret")
+    b.attach_kprobe(event="udp_recvmsg", fn_name="trace_udp_recvmsg")
+    b.attach_kretprobe(event="udp_recvmsg", fn_name="trace_udp_recvmsg_ret")
+
+    csv_file = open(args.output, "w")
+    csv_file.write("timestamp,event_type,value_ns,pid\n")
+
+    def handle_event(cpu, data, size):
+        event = b["events"].event(data)
+        etype = EVENT_TYPES.get(event.event_type, "UNKNOWN")
+        csv_file.write(f"{time.time()},{etype},{event.delta_ns},{event.pid}\n")
+
+        # Update live stats
+        if event.event_type == 0:
+            stats["send_count"] += 1
+            stats["send_total_ns"] += event.delta_ns
+        elif event.event_type == 1:
+            stats["recv_count"] += 1
+            stats["recv_total_ns"] += event.delta_ns
+        elif event.event_type == 2:
+            stats["drop_count"] += 1
+
+    b["events"].open_perf_buffer(handle_event)
+
+    def signal_handler(sig, frame):
+        print("\n--- Measurement Summary ---")
+        if stats["send_count"] > 0:
+            avg_send = stats["send_total_ns"] / stats["send_count"] / 1000
+            print(f"  Send events:  {stats['send_count']:>8}  (avg {avg_send:.1f} µs)")
+        if stats["recv_count"] > 0:
+            avg_recv = stats["recv_total_ns"] / stats["recv_count"] / 1000
+            print(f"  Recv events:  {stats['recv_count']:>8}  (avg {avg_recv:.1f} µs)")
+        print(f"  Drop events:  {stats['drop_count']:>8}")
+        print(f"  Output file:  {args.output}")
+        csv_file.close()
+        sys.exit(0)
+
+    signal.signal(signal.SIGINT, signal_handler)
+    signal.signal(signal.SIGTERM, signal_handler)
+
+    print(f"Tracing... Output → {args.output}. Ctrl-C to stop.")
+    while True:
+        b.perf_buffer_poll()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/client/main.go b/client/main.go
new file mode 100644
index 0000000..86eb1dd
--- /dev/null
+++ b/client/main.go
@@ -0,0 +1,96 @@
+package main
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/binary"
+	"flag"
+	"fmt"
+	"log"
+	"strings"
+	"time"
+
+	quic "github.com/AeonDave/mp-quic-go"
+	"mpquic-exp/client/scheduler"
+)
+
+func main() {
+	schedName := flag.String("scheduler", "roundrobin", "Scheduler to use")
+	listScheds := flag.Bool("list-schedulers", false, "List available schedulers")
+	addr := flag.String("addr", "127.0.0.1:4242", "Server address")
+	duration := flag.Int("duration", 10, "Duration in seconds")
+	payloadSize := flag.Int("payload-size", 1024, "Size of the payload in bytes (min 20)")
+	flag.Parse()
+
+	if *listScheds {
+		fmt.Println("Available schedulers:")
+		for _, name := range scheduler.List() {
+			fmt.Println(" -", name)
+		}
+		return
+	}
+
+	if *payloadSize < 20 {
+		*payloadSize = 20 // 4 bytes length, 8 bytes seq, 8 bytes timestamp
+	}
+
+	tlsConf := &tls.Config{
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"mpquic-exp"},
+	}
+
+	sched, err := scheduler.Get(*schedName)
+	if err != nil {
+		log.Fatalf("Error: %v. Available: %s", err, strings.Join(scheduler.List(), ", "))
+	}
+
+	quicConfig := &quic.Config{
+		MaxPaths:            4,
+		MultipathController: quic.NewDefaultMultipathController(sched),
+	}
+
+	fmt.Printf("Connecting to %s using %s scheduler...\n", *addr, *schedName)
+	conn, err := quic.DialAddr(context.Background(), *addr, tlsConf, quicConfig)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	stream, err := conn.OpenStreamSync(context.Background())
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("Stream opened, sending data for %d seconds (Payload Size: %d bytes)...\n", *duration, *payloadSize)
+
+	end := time.Now().Add(time.Duration(*duration) * time.Second)
+	payload := make([]byte, *payloadSize)
+	
+	// Frame structure:
+	// [0:4] uint32 Total Length
+	// [4:12] uint64 Sequence Number
+	// [12:20] uint64 Send Timestamp (nanoseconds)
+	// [20:] Padding (dummy data)
+	binary.BigEndian.PutUint32(payload[0:4], uint32(*payloadSize))
+
+	var seqNum uint64 = 0
+	totalBytes := 0
+	
+	// Target sending rate: we don't want to lock the CPU entirely in a busy loop.
+	// We yield slightly to allow the network stack to process.
+	// But to measure max throughput we just send as fast as stream.Write allows.
+	for time.Now().Before(end) {
+		seqNum++
+		sendTime := uint64(time.Now().UnixNano())
+		
+		binary.BigEndian.PutUint64(payload[4:12], seqNum)
+		binary.BigEndian.PutUint64(payload[12:20], sendTime)
+		
+		n, err := stream.Write(payload)
+		if err != nil {
+			log.Fatal("Stream write error:", err)
+		}
+		totalBytes += n
+	}
+	
+	fmt.Printf("Finished sending %d packets, %d bytes (%.2f MB)\n", seqNum, totalBytes, float64(totalBytes)/1024/1024)
+}
diff --git a/client/scheduler/custom_example.go b/client/scheduler/custom_example.go
new file mode 100644
index 0000000..d5b851d
--- /dev/null
+++ b/client/scheduler/custom_example.go
@@ -0,0 +1,100 @@
+package scheduler
+
+// This file demonstrates how to add a custom scheduler.
+// To create your own:
+//   1. Copy this file and rename it (e.g., weighted_rtt.go)
+//   2. Implement the three PathScheduler methods
+//   3. Update the init() to register with your scheduler name
+//
+// The scheduler will automatically appear in --list-schedulers.
+
+import (
+	"sync"
+
+	quic "github.com/AeonDave/mp-quic-go"
+)
+
+func init() {
+	Register("weighted", func() quic.PathScheduler {
+		return NewWeightedScheduler()
+	})
+}
+
+// WeightedScheduler is an example custom scheduler that weighs paths
+// by a combination of RTT and available congestion window.
+type WeightedScheduler struct {
+	mu     sync.Mutex
+	quotas map[quic.PathID]uint64
+}
+
+// NewWeightedScheduler creates a new weighted scheduler.
+func NewWeightedScheduler() *WeightedScheduler {
+	return &WeightedScheduler{
+		quotas: make(map[quic.PathID]uint64),
+	}
+}
+
+// SelectPath picks the path with the best weighted score.
+// Score = (CongestionWindow - BytesInFlight) / (1 + SmoothedRTT_ms)
+// Higher score = more capacity available per unit latency.
+func (s *WeightedScheduler) SelectPath(paths []quic.SchedulerPathInfo, hasRetransmission bool) *quic.SchedulerPathInfo {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if len(paths) == 0 {
+		return nil
+	}
+	if len(paths) == 1 {
+		if !hasRetransmission && !paths[0].SendingAllowed {
+			return nil
+		}
+		return &paths[0]
+	}
+
+	var best *quic.SchedulerPathInfo
+	var bestScore float64 = -1
+
+	for i := range paths {
+		p := &paths[i]
+		if !hasRetransmission && !p.SendingAllowed {
+			continue
+		}
+		if p.PotentiallyFailed {
+			continue
+		}
+
+		// Available window
+		available := float64(0)
+		if p.CongestionWindow > p.BytesInFlight {
+			available = float64(p.CongestionWindow - p.BytesInFlight)
+		}
+
+		// RTT factor (ms, minimum 1 to avoid division by zero)
+		rttMs := float64(1)
+		if p.SmoothedRTT.Milliseconds() > 0 {
+			rttMs = float64(p.SmoothedRTT.Milliseconds())
+		}
+
+		score := available / rttMs
+		if score > bestScore {
+			bestScore = score
+			best = p
+		}
+	}
+
+	return best
+}
+
+// UpdateQuota tracks per-path send counts.
+func (s *WeightedScheduler) UpdateQuota(pathID quic.PathID, packetSize quic.ByteCount) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.quotas[pathID]++
+}
+
+// Reset clears all state.
+func (s *WeightedScheduler) Reset() {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.quotas = make(map[quic.PathID]uint64)
+}
diff --git a/client/scheduler/lowlatency.go b/client/scheduler/lowlatency.go
new file mode 100644
index 0000000..4010b47
--- /dev/null
+++ b/client/scheduler/lowlatency.go
@@ -0,0 +1,9 @@
+package scheduler
+
+import quic "github.com/AeonDave/mp-quic-go"
+
+func init() {
+	Register("lowlatency", func() quic.PathScheduler {
+		return quic.NewLowLatencyScheduler()
+	})
+}
diff --git a/client/scheduler/minrtt.go b/client/scheduler/minrtt.go
new file mode 100644
index 0000000..aead772
--- /dev/null
+++ b/client/scheduler/minrtt.go
@@ -0,0 +1,11 @@
+package scheduler
+
+import quic "github.com/AeonDave/mp-quic-go"
+
+func init() {
+	Register("minrtt", func() quic.PathScheduler {
+		// rttBias=0.8 favors lower RTT paths while still considering load balance.
+		// Adjust this value: 1.0=pure RTT, 0.0=pure load balancing.
+		return quic.NewMinRTTScheduler(0.8)
+	})
+}
diff --git a/client/scheduler/registry.go b/client/scheduler/registry.go
new file mode 100644
index 0000000..6cebe4f
--- /dev/null
+++ b/client/scheduler/registry.go
@@ -0,0 +1,60 @@
+// Package scheduler provides a modular registry for MP-QUIC path schedulers.
+//
+// Adding a new scheduler:
+//  1. Create a new file in this package (e.g., myscheduler.go)
+//  2. Implement quic.PathScheduler (SelectPath, UpdateQuota, Reset)
+//  3. In an init() function, call Register("myscheduler", factory)
+//
+// See custom_example.go for a complete example.
+package scheduler
+
+import (
+	"fmt"
+	"sort"
+	"sync"
+
+	quic "github.com/AeonDave/mp-quic-go"
+)
+
+// Factory is a function that creates a new PathScheduler instance.
+type Factory func() quic.PathScheduler
+
+var (
+	mu        sync.RWMutex
+	factories = make(map[string]Factory)
+)
+
+// Register adds a scheduler factory to the registry.
+// Call this from init() in each scheduler file.
+func Register(name string, factory Factory) {
+	mu.Lock()
+	defer mu.Unlock()
+	if _, exists := factories[name]; exists {
+		panic(fmt.Sprintf("scheduler: duplicate registration for %q", name))
+	}
+	factories[name] = factory
+}
+
+// Get creates a new instance of the named scheduler.
+// Returns an error if the name is not registered.
+func Get(name string) (quic.PathScheduler, error) {
+	mu.RLock()
+	defer mu.RUnlock()
+	factory, exists := factories[name]
+	if !exists {
+		return nil, fmt.Errorf("scheduler: unknown scheduler %q (available: %v)", name, List())
+	}
+	return factory(), nil
+}
+
+// List returns sorted names of all registered schedulers.
+func List() []string {
+	mu.RLock()
+	defer mu.RUnlock()
+	names := make([]string, 0, len(factories))
+	for name := range factories {
+		names = append(names, name)
+	}
+	sort.Strings(names)
+	return names
+}
diff --git a/client/scheduler/roundrobin.go b/client/scheduler/roundrobin.go
new file mode 100644
index 0000000..fbb4ab6
--- /dev/null
+++ b/client/scheduler/roundrobin.go
@@ -0,0 +1,9 @@
+package scheduler
+
+import quic "github.com/AeonDave/mp-quic-go"
+
+func init() {
+	Register("roundrobin", func() quic.PathScheduler {
+		return quic.NewRoundRobinScheduler()
+	})
+}
diff --git a/client/scripts/run.sh b/client/scripts/run.sh
new file mode 100755
index 0000000..75c47a6
--- /dev/null
+++ b/client/scripts/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+# Build the client
+echo "Building client..."
+go build -o client_bin main.go
+
+echo "Starting client..."
+./client_bin "$@"
diff --git a/client/scripts/setup.sh b/client/scripts/setup.sh
new file mode 100644
index 0000000..e570bad
--- /dev/null
+++ b/client/scripts/setup.sh
@@ -0,0 +1,94 @@
+#!/bin/bash
+# Setup script for MP-QUIC experiment environment.
+# Run on each Linux machine (server + client) before experiments.
+set -euo pipefail
+
+echo "╔═══════════════════════════════════════════╗"
+echo "║  MP-QUIC Experiment Environment Setup     ║"
+echo "╚═══════════════════════════════════════════╝"
+
+# --- OS Check ---
+if [[ ! -f /etc/os-release ]]; then
+    echo "❌ Not running on Linux. eBPF tracing requires Linux."
+    echo "   You can still build and run the Go binaries on this machine."
+    exit 1
+fi
+
+. /etc/os-release
+echo "📋 Detected OS: $PRETTY_NAME"
+
+# --- Install dependencies ---
+if [[ "$ID" == "ubuntu" || "$ID" == "debian" ]]; then
+    echo ""
+    echo "📦 Installing packages..."
+    sudo apt-get update -qq
+    sudo apt-get install -y -qq \
+        bpfcc-tools \
+        python3-bpfcc \
+        linux-headers-$(uname -r) \
+        golang-go \
+        iperf3 \
+        net-tools \
+        iproute2
+
+    # Ensure Python3 BCC bindings work
+    python3 -c "from bcc import BPF; print('   ✓ BCC Python bindings OK')" 2>/dev/null || {
+        echo "   ⚠  BCC Python import failed. Try: sudo apt install python3-bpfcc"
+    }
+elif [[ "$ID" == "fedora" || "$ID" == "rhel" || "$ID" == "centos" ]]; then
+    echo ""
+    echo "📦 Installing packages (DNF)..."
+    sudo dnf install -y \
+        bcc-tools \
+        python3-bcc \
+        kernel-devel-$(uname -r) \
+        golang \
+        iperf3 \
+        iproute
+else
+    echo "⚠  Unsupported distro: $ID"
+    echo "   Please install manually: bcc-tools, python3-bcc, golang, linux-headers"
+fi
+
+# --- Verify Go ---
+echo ""
+if command -v go &>/dev/null; then
+    echo "✓ Go $(go version | awk '{print $3}')"
+else
+    echo "❌ Go not found. Install from https://go.dev/dl/"
+    exit 1
+fi
+
+# --- Kernel config check ---
+echo ""
+echo "🔍 Checking kernel eBPF support..."
+if [[ -d /sys/kernel/debug/tracing ]]; then
+    echo "   ✓ debugfs mounted"
+else
+    echo "   ⚠  debugfs not mounted. Run: sudo mount -t debugfs debugfs /sys/kernel/debug"
+fi
+
+if grep -q CONFIG_BPF=y /boot/config-$(uname -r) 2>/dev/null; then
+    echo "   ✓ CONFIG_BPF enabled"
+else
+    echo "   ⚠  Could not verify CONFIG_BPF (may still work)"
+fi
+
+# --- Network tuning (optional) ---
+echo ""
+echo "🔧 Applying network tuning..."
+sudo sysctl -w net.core.rmem_max=26214400 2>/dev/null && echo "   ✓ rmem_max=25MB" || true
+sudo sysctl -w net.core.wmem_max=26214400 2>/dev/null && echo "   ✓ wmem_max=25MB" || true
+sudo sysctl -w net.core.rmem_default=1048576 2>/dev/null || true
+sudo sysctl -w net.core.wmem_default=1048576 2>/dev/null || true
+
+echo ""
+echo "╔═══════════════════════════════════════════╗"
+echo "║  ✓ Setup complete!                        ║"
+echo "║                                           ║"
+echo "║  Quick start:                             ║"
+echo "║    python3 run_experiment.py --duration 10 ║"
+echo "║                                           ║"
+echo "║  With eBPF (needs sudo):                  ║"
+echo "║    python3 run_experiment.py --ebpf        ║"
+echo "╚═══════════════════════════════════════════╝"
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..420be8c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,11 @@
+module mpquic-exp
+
+go 1.26.3
+
+require github.com/AeonDave/mp-quic-go v0.1.3
+
+require (
+	golang.org/x/crypto v0.46.0 // indirect
+	golang.org/x/net v0.48.0 // indirect
+	golang.org/x/sys v0.39.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..0279849
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,18 @@
+github.com/AeonDave/mp-quic-go v0.1.3 h1:iJUJ1+RDNQjWBljk0w34u0fGihzNoyJmMZoJSaIqiNg=
+github.com/AeonDave/mp-quic-go v0.1.3/go.mod h1:uJ/V2CfzOuu6YpagbsR58dk+CSKvWsGsRi/Kcwqh+Dk=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+go.uber.org/mock v0.6.0 h1:hyF9dfmbgIX5EfOdasqLsWD6xqpNZlXblLB/Dbnwv3Y=
+go.uber.org/mock v0.6.0/go.mod h1:KiVJ4BqZJaMj4svdfmHM0AUx4NJYO8ZNpPnZn1Z+BBU=
+golang.org/x/crypto v0.46.0 h1:cKRW/pmt1pKAfetfu+RCEvjvZkA9RimPbh7bhFjGVBU=
+golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0=
+golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
+golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
+golang.org/x/sys v0.39.0 h1:CvCKL8MeisomCi6qNZ+wbb0DN9E5AATixKsvNtMoMFk=
+golang.org/x/sys v0.39.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/server/ebpf/measure.py b/server/ebpf/measure.py
new file mode 100644
index 0000000..5558a17
--- /dev/null
+++ b/server/ebpf/measure.py
@@ -0,0 +1,191 @@
+#!/usr/bin/env python3
+"""eBPF-based UDP tracer for MP-QUIC performance measurement.
+
+Traces kernel-level UDP send/receive latency and packet drops.
+Requires root privileges and Linux with BCC installed.
+"""
+
+from bcc import BPF
+import time
+import argparse
+import signal
+import sys
+
+bpf_text = """
+#include <uapi/linux/ptrace.h>
+#include <net/sock.h>
+#include <net/inet_sock.h>
+#include <bcc/proto.h>
+
+#define MPQUIC_PORT __TARGET_PORT__
+
+BPF_HASH(send_start, u32, u64);
+BPF_HASH(recv_start, u32, u64);
+
+BPF_PERF_OUTPUT(events);
+
+struct event_t {
+    u64 timestamp_ns;
+    u64 delta_ns;
+    u32 pid;
+    u16 sport;
+    u16 dport;
+    u8  event_type;  // 0=SEND, 1=RECV, 2=DROP
+};
+
+int trace_udp_sendmsg(struct pt_regs *ctx, struct sock *sk) {
+    struct inet_sock *inet = (struct inet_sock *)sk;
+    u16 dport = 0;
+    bpf_probe_read_kernel(&dport, sizeof(dport), &inet->inet_dport);
+    dport = ntohs(dport);
+
+    // Filter: only trace traffic to/from MP-QUIC port
+    u16 sport = 0;
+    bpf_probe_read_kernel(&sport, sizeof(sport), &inet->inet_sport);
+    sport = ntohs(sport);
+
+    if (dport != MPQUIC_PORT && sport != MPQUIC_PORT)
+        return 0;
+
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 ts = bpf_ktime_get_ns();
+    send_start.update(&pid, &ts);
+    return 0;
+}
+
+int trace_udp_sendmsg_ret(struct pt_regs *ctx) {
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 *tsp = send_start.lookup(&pid);
+    if (tsp == 0)
+        return 0;
+
+    u64 delta = bpf_ktime_get_ns() - *tsp;
+    send_start.delete(&pid);
+
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = delta;
+    event.pid = pid;
+    event.event_type = 0;  // SEND
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+
+int trace_udp_recvmsg(struct pt_regs *ctx, struct sock *sk) {
+    struct inet_sock *inet = (struct inet_sock *)sk;
+    u16 sport = 0;
+    bpf_probe_read_kernel(&sport, sizeof(sport), &inet->inet_sport);
+    sport = ntohs(sport);
+
+    u16 dport = 0;
+    bpf_probe_read_kernel(&dport, sizeof(dport), &inet->inet_dport);
+    dport = ntohs(dport);
+
+    if (sport != MPQUIC_PORT && dport != MPQUIC_PORT)
+        return 0;
+
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 ts = bpf_ktime_get_ns();
+    recv_start.update(&pid, &ts);
+    return 0;
+}
+
+int trace_udp_recvmsg_ret(struct pt_regs *ctx) {
+    u32 pid = bpf_get_current_pid_tgid();
+    u64 *tsp = recv_start.lookup(&pid);
+    if (tsp == 0)
+        return 0;
+
+    u64 delta = bpf_ktime_get_ns() - *tsp;
+    recv_start.delete(&pid);
+
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = delta;
+    event.pid = pid;
+    event.event_type = 1;  // RECV
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+
+TRACEPOINT_PROBE(skb, kfree_skb) {
+    struct event_t event = {};
+    event.timestamp_ns = bpf_ktime_get_ns();
+    event.delta_ns = 0;
+    event.pid = bpf_get_current_pid_tgid();
+    event.event_type = 2;  // DROP
+    events.perf_submit(ctx, &event, sizeof(event));
+    return 0;
+}
+"""
+
+EVENT_TYPES = {0: "SEND_LATENCY", 1: "RECV_LATENCY", 2: "DROP"}
+
+# Counters for live summary
+stats = {"send_count": 0, "recv_count": 0, "drop_count": 0,
+         "send_total_ns": 0, "recv_total_ns": 0}
+
+
+def main():
+    parser = argparse.ArgumentParser(description="eBPF UDP Tracer for MP-QUIC")
+    parser.add_argument("--output", type=str, default="measurement.csv",
+                        help="CSV output file")
+    parser.add_argument("--port", type=int, default=4242,
+                        help="MP-QUIC port to filter on")
+    args = parser.parse_args()
+
+    program = bpf_text.replace("__TARGET_PORT__", str(args.port))
+
+    print(f"Compiling eBPF program (requires root)...")
+    print(f"Filtering on UDP port {args.port}")
+    b = BPF(text=program)
+
+    # Attach kprobes for send and receive paths
+    b.attach_kprobe(event="udp_sendmsg", fn_name="trace_udp_sendmsg")
+    b.attach_kretprobe(event="udp_sendmsg", fn_name="trace_udp_sendmsg_ret")
+    b.attach_kprobe(event="udp_recvmsg", fn_name="trace_udp_recvmsg")
+    b.attach_kretprobe(event="udp_recvmsg", fn_name="trace_udp_recvmsg_ret")
+
+    csv_file = open(args.output, "w")
+    csv_file.write("timestamp,event_type,value_ns,pid\n")
+
+    def handle_event(cpu, data, size):
+        event = b["events"].event(data)
+        etype = EVENT_TYPES.get(event.event_type, "UNKNOWN")
+        csv_file.write(f"{time.time()},{etype},{event.delta_ns},{event.pid}\n")
+
+        # Update live stats
+        if event.event_type == 0:
+            stats["send_count"] += 1
+            stats["send_total_ns"] += event.delta_ns
+        elif event.event_type == 1:
+            stats["recv_count"] += 1
+            stats["recv_total_ns"] += event.delta_ns
+        elif event.event_type == 2:
+            stats["drop_count"] += 1
+
+    b["events"].open_perf_buffer(handle_event)
+
+    def signal_handler(sig, frame):
+        print("\n--- Measurement Summary ---")
+        if stats["send_count"] > 0:
+            avg_send = stats["send_total_ns"] / stats["send_count"] / 1000
+            print(f"  Send events:  {stats['send_count']:>8}  (avg {avg_send:.1f} µs)")
+        if stats["recv_count"] > 0:
+            avg_recv = stats["recv_total_ns"] / stats["recv_count"] / 1000
+            print(f"  Recv events:  {stats['recv_count']:>8}  (avg {avg_recv:.1f} µs)")
+        print(f"  Drop events:  {stats['drop_count']:>8}")
+        print(f"  Output file:  {args.output}")
+        csv_file.close()
+        sys.exit(0)
+
+    signal.signal(signal.SIGINT, signal_handler)
+    signal.signal(signal.SIGTERM, signal_handler)
+
+    print(f"Tracing... Output → {args.output}. Ctrl-C to stop.")
+    while True:
+        b.perf_buffer_poll()
+
+
+if __name__ == "__main__":
+    main()
diff --git a/server/main.go b/server/main.go
new file mode 100644
index 0000000..c085e45
--- /dev/null
+++ b/server/main.go
@@ -0,0 +1,139 @@
+package main
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/binary"
+	"encoding/csv"
+	"encoding/pem"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"math/big"
+	"os"
+	"strconv"
+	"sync"
+	"time"
+
+	quic "github.com/AeonDave/mp-quic-go"
+)
+
+func generateTLSConfig() *tls.Config {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		panic(err)
+	}
+	template := x509.Certificate{SerialNumber: big.NewInt(1)}
+	certDER, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
+	if err != nil {
+		panic(err)
+	}
+	keyPEM := pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)})
+	certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER})
+
+	tlsCert, err := tls.X509KeyPair(certPEM, keyPEM)
+	if err != nil {
+		panic(err)
+	}
+	return &tls.Config{
+		Certificates: []tls.Certificate{tlsCert},
+		NextProtos:   []string{"mpquic-exp"},
+	}
+}
+
+func main() {
+	addr := flag.String("addr", "0.0.0.0:4242", "Address to listen on")
+	maxPaths := flag.Int("maxpaths", 4, "Maximum number of paths")
+	outCSV := flag.String("output", "app_metrics.csv", "Output CSV for application-level metrics")
+	flag.Parse()
+
+	listener, err := quic.ListenAddr(*addr, generateTLSConfig(), &quic.Config{
+		MaxPaths: *maxPaths,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("Server listening on %s with max %d paths\n", *addr, *maxPaths)
+	fmt.Printf("Logging app-level metrics to %s\n", *outCSV)
+
+	// Open CSV
+	f, err := os.OpenFile(*outCSV, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
+	if err != nil {
+		log.Fatal("Failed to open CSV:", err)
+	}
+	defer f.Close()
+
+	writer := csv.NewWriter(f)
+	writer.Write([]string{"sequence_number", "drone_send_time", "ground_recv_time", "latency_ns", "bytes_received"})
+	writer.Flush()
+
+	// Mutex to protect CSV writer if multiple streams are used
+	var mu sync.Mutex
+
+	for {
+		conn, err := listener.Accept(context.Background())
+		if err != nil {
+			log.Fatal(err)
+		}
+		fmt.Println("Client connected:", conn.RemoteAddr())
+
+		go func(conn *quic.Conn) {
+			for {
+				stream, err := conn.AcceptStream(context.Background())
+				if err != nil {
+					fmt.Println("Session error:", err)
+					return
+				}
+				go func(stream *quic.Stream) {
+					header := make([]byte, 4)
+					for {
+						// Read 4-byte length prefix
+						_, err := io.ReadFull(stream, header)
+						if err != nil {
+							fmt.Printf("Stream closed\n")
+							return
+						}
+						
+						length := binary.BigEndian.Uint32(header)
+						if length < 20 {
+							fmt.Printf("Warning: Invalid frame length %d\n", length)
+							continue
+						}
+						
+						// Read rest of the payload
+						payload := make([]byte, length-4)
+						_, err = io.ReadFull(stream, payload)
+						if err != nil {
+							fmt.Printf("Stream read error: %v\n", err)
+							return
+						}
+						
+						recvTime := time.Now().UnixNano()
+						
+						seqNum := binary.BigEndian.Uint64(payload[0:8])
+						sendTime := binary.BigEndian.Uint64(payload[8:16])
+						latency := recvTime - int64(sendTime)
+						
+						mu.Lock()
+						writer.Write([]string{
+							strconv.FormatUint(seqNum, 10),
+							strconv.FormatUint(sendTime, 10),
+							strconv.FormatInt(recvTime, 10),
+							strconv.FormatInt(latency, 10),
+							strconv.FormatUint(uint64(length), 10),
+						})
+						// Periodically flush? 
+						if seqNum % 1000 == 0 {
+							writer.Flush()
+						}
+						mu.Unlock()
+					}
+				}(stream)
+			}
+		}(conn)
+	}
+}
diff --git a/server/scripts/run.sh b/server/scripts/run.sh
new file mode 100755
index 0000000..5f0bdb2
--- /dev/null
+++ b/server/scripts/run.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+# Build the server
+echo "Building server..."
+go build -o server_bin main.go
+
+echo "Starting server..."
+./server_bin "$@"
diff --git a/server/scripts/setup.sh b/server/scripts/setup.sh
new file mode 100644
index 0000000..e570bad
--- /dev/null
+++ b/server/scripts/setup.sh
@@ -0,0 +1,94 @@
+#!/bin/bash
+# Setup script for MP-QUIC experiment environment.
+# Run on each Linux machine (server + client) before experiments.
+set -euo pipefail
+
+echo "╔═══════════════════════════════════════════╗"
+echo "║  MP-QUIC Experiment Environment Setup     ║"
+echo "╚═══════════════════════════════════════════╝"
+
+# --- OS Check ---
+if [[ ! -f /etc/os-release ]]; then
+    echo "❌ Not running on Linux. eBPF tracing requires Linux."
+    echo "   You can still build and run the Go binaries on this machine."
+    exit 1
+fi
+
+. /etc/os-release
+echo "📋 Detected OS: $PRETTY_NAME"
+
+# --- Install dependencies ---
+if [[ "$ID" == "ubuntu" || "$ID" == "debian" ]]; then
+    echo ""
+    echo "📦 Installing packages..."
+    sudo apt-get update -qq
+    sudo apt-get install -y -qq \
+        bpfcc-tools \
+        python3-bpfcc \
+        linux-headers-$(uname -r) \
+        golang-go \
+        iperf3 \
+        net-tools \
+        iproute2
+
+    # Ensure Python3 BCC bindings work
+    python3 -c "from bcc import BPF; print('   ✓ BCC Python bindings OK')" 2>/dev/null || {
+        echo "   ⚠  BCC Python import failed. Try: sudo apt install python3-bpfcc"
+    }
+elif [[ "$ID" == "fedora" || "$ID" == "rhel" || "$ID" == "centos" ]]; then
+    echo ""
+    echo "📦 Installing packages (DNF)..."
+    sudo dnf install -y \
+        bcc-tools \
+        python3-bcc \
+        kernel-devel-$(uname -r) \
+        golang \
+        iperf3 \
+        iproute
+else
+    echo "⚠  Unsupported distro: $ID"
+    echo "   Please install manually: bcc-tools, python3-bcc, golang, linux-headers"
+fi
+
+# --- Verify Go ---
+echo ""
+if command -v go &>/dev/null; then
+    echo "✓ Go $(go version | awk '{print $3}')"
+else
+    echo "❌ Go not found. Install from https://go.dev/dl/"
+    exit 1
+fi
+
+# --- Kernel config check ---
+echo ""
+echo "🔍 Checking kernel eBPF support..."
+if [[ -d /sys/kernel/debug/tracing ]]; then
+    echo "   ✓ debugfs mounted"
+else
+    echo "   ⚠  debugfs not mounted. Run: sudo mount -t debugfs debugfs /sys/kernel/debug"
+fi
+
+if grep -q CONFIG_BPF=y /boot/config-$(uname -r) 2>/dev/null; then
+    echo "   ✓ CONFIG_BPF enabled"
+else
+    echo "   ⚠  Could not verify CONFIG_BPF (may still work)"
+fi
+
+# --- Network tuning (optional) ---
+echo ""
+echo "🔧 Applying network tuning..."
+sudo sysctl -w net.core.rmem_max=26214400 2>/dev/null && echo "   ✓ rmem_max=25MB" || true
+sudo sysctl -w net.core.wmem_max=26214400 2>/dev/null && echo "   ✓ wmem_max=25MB" || true
+sudo sysctl -w net.core.rmem_default=1048576 2>/dev/null || true
+sudo sysctl -w net.core.wmem_default=1048576 2>/dev/null || true
+
+echo ""
+echo "╔═══════════════════════════════════════════╗"
+echo "║  ✓ Setup complete!                        ║"
+echo "║                                           ║"
+echo "║  Quick start:                             ║"
+echo "║    python3 run_experiment.py --duration 10 ║"
+echo "║                                           ║"
+echo "║  With eBPF (needs sudo):                  ║"
+echo "║    python3 run_experiment.py --ebpf        ║"
+echo "╚═══════════════════════════════════════════╝"