mirror of
https://github.com/varun-r-mallya/Python-BPF.git
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varun-r-mallya
71d005b6b1
* Breaks when it finds unions. * Still does not support function pointers.
55 lines
1.5 KiB
Python
55 lines
1.5 KiB
Python
from pythonbpf import bpf, map, section, bpfglobal, compile_to_ir
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from pythonbpf.maps import HashMap
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from pythonbpf.helper import XDP_PASS
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from vmlinux import TASK_COMM_LEN # noqa: F401
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from vmlinux import struct_qspinlock # noqa: F401
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# from vmlinux import struct_trace_event_raw_sys_enter # noqa: F401
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# from vmlinux import struct_posix_cputimers # noqa: F401
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from vmlinux import struct_xdp_md
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# from vmlinux import struct_trace_event_raw_sys_enter # noqa: F401
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# from vmlinux import struct_ring_buffer_per_cpu # noqa: F401
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# from vmlinux import struct_request # noqa: F401
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from ctypes import c_int64
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# Instructions to how to run this program
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# 1. Install PythonBPF: pip install pythonbpf
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# 2. Run the program: python examples/xdp_pass.py
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# 3. Run the program with sudo: sudo tools/check.sh run examples/xdp_pass.o
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# 4. Attach object file to any network device with something like ./check.sh xdp examples/xdp_pass.o tailscale0
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# 5. send traffic through the device and observe effects
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@bpf
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@map
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def count() -> HashMap:
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return HashMap(key=c_int64, value=c_int64, max_entries=1)
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@bpf
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@section("xdp")
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def hello_world(ctx: struct_xdp_md) -> c_int64:
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key = 0
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one = 1
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prev = count().lookup(key)
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if prev:
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prevval = prev + 1
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print(f"count: {prevval}")
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count().update(key, prevval)
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return XDP_PASS
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else:
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count().update(key, one)
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return XDP_PASS
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@bpf
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@bpfglobal
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def LICENSE() -> str:
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return "GPL"
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compile_to_ir("xdp_pass.py", "xdp_pass.ll")
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