add xdp_ddos XDP main program with bpf tail
call table and user space xdp-ddos program
to load and insert protocol DDoS program like
TCP or UDP or ICMP into bpf tail call table.
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
commit f938e63dc6b2cd8a271bb4aa58d8371f4a9fa94c
Author: Vincent Li <vincent.mc.li@gmail.com>
Date: Sat Jan 11 10:55:23 2025 -0800
xdp-dns: fix XDP dns log stack smashing error
gdb --args xdp_dns_log /sys/fs/bpf/xdp-tailcall/dns_ringbuf
result in backtrace:
(gdb) bt
0x00007ffff7d5fa80 in ?? () from /lib64/libc.so.6
0x00007ffff7d0be1c in raise () from /lib64/libc.so.6
0x00007ffff7cf49fc in abort () from /lib64/libc.so.6
0x00007ffff7d50ff0 in ?? () from /lib64/libc.so.6
0x00007ffff7de32d4 in __fortify_fail () from /lib64/libc.so.6
0x00007ffff7de42b0 in __stack_chk_fail () from /lib64/libc.so.6
0x000000012000f248 in handle_event ()
0x00007ffff7eca0fc in ?? () from /usr/lib64/libbpf.so.1
0x00007ffff7eca8c8 in ring_buffer.poll () from /usr/lib64/libbpf.so.1
0x000000012000372c in main ()
Paste the gdb backtrace in ChatGPT and ChatGPT suggested the fix
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
Loongarch64 does not support bpf trampoline
and freplace, so we can't use libxdp to attach
multiple XDP program to same network interface.
Loongarch64 supports bpf tail call, so we can still
use xdp-loader to load XDP program, and use bpf tail
call to call each XDP program. now we can tail call
DNS and TLS SNI XDP program on green0 interface
change user space program to take bpf map path as
command line argument so X86 and Loongarch64 can share
same user space program
https://github.com/vincentmli/xdp-tools
commit d18f8a7b48094c861a8ee0d5c0d52e93a01edca4
Author: Vincent Li <vincent.mc.li@gmail.com>
Date: Tue Jan 7 22:14:40 2025 -0800
xdp-tools: add bpf map path as cmd line argument
add XDP DNS and TLS SNI user space program command
line argument for bpf map so X86 and Loongarch can
share the same XDP user space program
commit 5d713b40dd2d0ce399f618179a2add6c07882e2a
Author: Vincent Li <vincent.mc.li@gmail.com>
Date: Mon Jan 6 21:09:25 2025 -0800
xdp-tailcall: add DNS XDP program
add DNS XDP program as tail called program
commit ad2a4e600140f8bf7a577470566efcdf11f6e214
Author: Vincent Li <vincent.mc.li@gmail.com>
Date: Mon Jan 6 20:36:43 2025 -0800
xdp-tailcall: add XDP tailcall
Loongarch64 does not support bpf trampoline and
freplace, so use tail call to call XDP program.
Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
