Iris: Expressive Traffic Analysis for the Modern Internet

In this work, we investigate the needs of modern traffic analysis, and we introduce Iris, a framework for efficiently building complex, high-performance traffic analysis applications. Iris's key contribution is a compiler that transforms user-defined traffic filters, stream transformations, and computation written in Rust into an optimized processing pipeline. The Iris compiler eliminates redundant logic across analysis tasks to generate a unified runtime that minimizes aggregate work, allowing it to scale to hundreds of concurrent workloads. Rather than restricting users to a domain-specific query language, Iris provides a flexible development environment by exposing connection- and application-layer semantics as Rust data types to user-defined functions. We show that Iris can execute hundreds of analysis tasks concurrently at 100Gbps+ on a single commodity server, and we demonstrate its flexibility through three use cases drawn from prior work.