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9497cf8394
* Use ebpf program to find PID of new connections.
before running the branch you have to compile ebpf_prog/opensnitch.c
opensnitch.c is an eBPF program. Compilation requires getting kernel source.
cd opensnitch
wget https://github.com/torvalds/linux/archive/v5.8.tar.gz
tar -xf v5.8.tar.gz
patch linux-5.8/tools/lib/bpf/bpf_helpers.h < ebpf_prog/file.patch
cp ebpf_prog/opensnitch.c ebpf_prog/Makefile linux-5.8/samples/bpf
cd linux-5.8 && yes "" | make oldconfig && make prepare && make headers_install # (1 min)
cd samples/bpf && make
objdump -h opensnitch.o #you should see many section, number 1 should be called kprobe/tcp_v4_connect
llvm-strip -g opensnitch.o #remove debug info
sudo cp opensnitch.o /etc/opensnitchd
cd ../../../daemon
--opensnitchd expects to find opensnitch.o in /etc/opensnitchd/
--start opensnitchd with:
opensnitchd -rules-path /etc/opensnitchd/rules -process-monitor-method ebpf
Co-authored-by: themighty1 <you@example.com>
Co-authored-by: Gustavo Iñiguez Goia <gooffy1@gmail.com>
11 lines
398 B
Diff
11 lines
398 B
Diff
--- linux-5.8/tools/lib/bpf/bpf_helpers.h 2020-08-03 00:21:45.000000000 +0300
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+++ linux-5.8/tools/lib/bpf/bpf_helpersnew.h 2021-02-23 18:45:21.789624834 +0300
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@@ -54,7 +54,7 @@
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* Helper structure used by eBPF C program
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* to describe BPF map attributes to libbpf loader
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*/
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-struct bpf_map_def {
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+struct bpf_map_defold {
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unsigned int type;
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unsigned int key_size;
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unsigned int value_size;
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