ebpf-packet-redirect

Source-based policy routing in eBPF is implemented using map-based routing tables and dynamic route updates to control packet forwarding paths for Cloud-Native Functions. This Skill provides the logic to define custom routing rules based on packet source attributes.

You need bpf_redirect_neigh for packet redirection when forwarding packets to a directly connected neighbor, requiring MAC address resolution. It facilitates neighbor-aware redirection, which is essential for building custom routers and gateways that bypass the standard Linux routing stack.

Yes, you can use eBPF to build a load balancer with dynamic route updates by implementing advanced packet redirection logic. This Skill includes patterns for load balancing and conditional routing, allowing fine-grained control over packet forwarding paths in custom network functions.

Yes, this eBPF packet redirection logic supports IPv6 traffic alongside IPv4. It includes advanced patterns and helper functions to manage packet forwarding, policy chaining, and source-based routing across both IP protocols for Cloud-Native Functions.

The best way to update routing tables dynamically in an eBPF program is by using map-based routing tables. This approach allows you to dynamically alter packet forwarding paths and implement conditional routing without reloading the entire eBPF program.

Using eBPF for packet forwarding provides fine-grained, programmable control over routing logic, enabling source-based policies and load balancing that standard Linux routing cannot easily handle. It allows custom routers and service mesh sidecars to process packets directly in the kernel.