kernelscript/examples/packet_filter.ks at main · multikernel/kernelscript · GitHub

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include "xdp.kh"

@xdp fn packet_filter(ctx: *xdp_md) -> xdp_action {

var packet_size = ctx->data_end - ctx->data

if (packet_size > 1500) {

return XDP_DROP

}

return XDP_PASS

}

fn main() -> i32 {

var prog = load(packet_filter)

attach(prog, "eth0", 0)

print("Packet filter attached to eth0")

print("Filtering incoming packets...")

// In a real application, this would run indefinitely

// For demonstration, we detach after setup

detach(prog)

print("Packet filter detached")

return 0

}

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