can't run xdp_dump

[FrelDX]

[root@node01 xdp_dump]# go build

github.com/dropbox/goebpf

In file included from ../../../map.go:13:0: ./bpf_helpers.h:957:15: error: expected declaration specifiers or '...' before 'sizeof' static_assert(sizeof(u8) == 1, "wrong_u8_size"); ^ ./bpf_helpers.h:957:34: error: expected declaration specifiers or '...' before string constant static_assert(sizeof(u8) == 1, "wrong_u8_size"); ^ ./bpf_helpers.h:958:15: error: expected declaration specifiers or '...' before 'sizeof' static_assert(sizeof(u16) == 2, "wrong_u16_size"); ^ ./bpf_helpers.h:958:35: error: expected declaration specifiers or '...' before string constant static_assert(sizeof(u16) == 2, "wrong_u16_size"); ^ ./bpf_helpers.h:959:15: error: expected declaration specifiers or '...' before 'sizeof' static_assert(sizeof(u32) == 4, "wrong_u32_size"); ^ ./bpf_helpers.h:959:35: error: expected declaration specifiers or '...' before string constant static_assert(sizeof(u32) == 4, "wrong_u32_size"); ^ ./bpf_helpers.h:960:15: error: expected declaration specifiers or '...' before 'sizeof' static_assert(sizeof(u64) == 8, "wrong_u64_size"); ^ ./bpf_helpers.h:960:35: error: expected declaration specifiers or '...' before string constant static_assert(sizeof(u64) == 8, "wrong_u64_size"); ^ [root@node01 xdp_dump]#

[FrelDX]

[root@node01 xdp_dump]# clang -v clang version 5.0.1 (tags/RELEASE_501/final) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /opt/rh/llvm-toolset-7/root/usr/bin Found candidate GCC installation: /opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7 Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.2 Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.8.5 Selected GCC installation: /opt/rh/devtoolset-7/root/usr/lib/gcc/x86_64-redhat-linux/7 Candidate multilib: .;@m64 Candidate multilib: 32;@m32 Selected multilib: .;@m64 [root@node01 xdp_dump]# go version go version go1.15.14 linux/amd64 [root@node01 xdp_dump]# uname -a Linux node01 5.4.171-1.el7.elrepo.x86_64 #1 SMP Mon Jan 10 18:01:24 EST 2022 x86_64 x86_64 x86_64 GNU/Linux [root@node01 xdp_dump]#

[belyalov]

Sounds like your clang compiler is way old, try newer one?

[FrelDX]

https://github.com/dropbox/goebpf/tree/master/examples/xdp/xdp_dump

In this example, only TCP related data will be obtained. Is there an example of obtaining IP layer or Ethernet layer data

[belyalov]

There is no such example. But you can modify this one a bit, move these lines https://github.com/dropbox/goebpf/blob/8a0799ae57d68d133a8b1e0127bf95d464384e23/examples/xdp/xdp_dump/ebpf_prog/xdp_dump.c#L127-L128 Up to somewhere https://github.com/dropbox/goebpf/blob/8a0799ae57d68d133a8b1e0127bf95d464384e23/examples/xdp/xdp_dump/ebpf_prog/xdp_dump.c#L80-L86

[FrelDX]

When I move the code to the specified location according to what you said, an error is reported, It seems that there are variables that are not defined, I don't understand C language. Can you give me a complete code

[FrelDX]

use of undeclared identifier evt