compile failed after include net/xxx.h

## bcc version
- ubuntu 22.04
- bcc version 0.25.0
- I build the bcc according to following commands.
```
apt purge bpfcc-tools libbpfcc python3-bpfcc
wget https://github.com/iovisor/bcc/releases/download/v0.25.0/bcc-src-with-submodule.tar.gz
tar xf bcc-src-with-submodule.tar.gz
cd bcc/
apt install -y python-is-python3
apt install -y bison build-essential cmake flex git libedit-dev libllvm11 llvm-11-dev libclang-11-dev zlib1g-dev libelf-dev libfl-dev python3-distutils
apt install -y checkinstall
mkdir build
cd build/
cmake -DCMAKE_INSTALL_PREFIX=/usr -DPYTHON_CMD=python3 ..
make
checkinstall
```

## gcc version
```
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.4.0-1ubuntu1~22.04' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-XeT9lY/gcc-11-11.4.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-XeT9lY/gcc-11-11.4.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04)
```

## clang version
```
Ubuntu clang version 12.0.1-19ubuntu3
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@m64
Selected multilib: .;@m64
```

## python version
```
Python 3.10.12
```

## kernel version
```
5.15.0-78-generic
```

## compile failed after I include header files under the net/
- run the `./bcc/tools/tcpconnlat.py`, which includes the and
- bpf_timer and BPF_F_BROADCAST is under the file
- I include the file, but it doesn't work.
- it complains same errors below.
```
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:41:9: warning: '__HAVE_BUILTIN_BSWAP32__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP32__
^
:4:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP32__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:42:9: warning: '__HAVE_BUILTIN_BSWAP64__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP64__
^
:5:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP64__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:43:9: warning: '__HAVE_BUILTIN_BSWAP16__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP16__
^
:3:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP16__ 1
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:41:
In file included from include/net/netprio_cgroup.h:11:
In file included from include/linux/cgroup.h:28:
In file included from include/linux/cgroup-defs.h:22:
In file included from include/linux/bpf-cgroup.h:5:
include/linux/bpf.h:211:35: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_timer'
memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
^ ~~~~~~~~~~~~~~~~~~
include/linux/bpf.h:211:49: note: forward declaration of 'struct bpf_timer'
memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
^
include/linux/bpf.h:225:10: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_timer'
t_sz = sizeof(struct bpf_timer);
^ ~~~~~~~~~~~~~~~~~~
include/linux/bpf.h:225:24: note: forward declaration of 'struct bpf_timer'
t_sz = sizeof(struct bpf_timer);
^
include/linux/bpf.h:539:26: error: use of undeclared identifier 'BPF_PSEUDO_FUNC'
insn->src_reg == BPF_PSEUDO_FUNC;
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:59:
include/linux/filter.h:1518:44: error: use of undeclared identifier 'BPF_F_BROADCAST'; did you mean 'IFF_BROADCAST'?
if (unlikely(!ri->tgt_value) && !(flags & BPF_F_BROADCAST)) {
^~~~~~~~~~~~~~~
IFF_BROADCAST
include/uapi/linux/if.h:86:2: note: 'IFF_BROADCAST' declared here
IFF_BROADCAST = 1<<1, /* volatile */
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:59:
include/linux/filter.h:1533:14: error: use of undeclared identifier 'BPF_F_BROADCAST'; did you mean 'IFF_BROADCAST'?
if (flags & BPF_F_BROADCAST) {
^~~~~~~~~~~~~~~
IFF_BROADCAST
include/uapi/linux/if.h:86:2: note: 'IFF_BROADCAST' declared here
IFF_BROADCAST = 1<<1, /* volatile */
^
3 warnings and 5 errors generated.
Traceback (most recent call last):
File "/home/vagrant/bcc/tools/./tcpconnlat.py", line 211, in
b = BPF(text=bpf_text)
File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 364, in __init__
raise Exception("Failed to compile BPF module %s" % (src_file or ""))
Exception: Failed to compile BPF module
vagrant@ubuntu-jammy:~/bcc/tools$
vagrant@ubuntu-jammy:~/bcc/tools$ ./tcpcon
tcpcong.py tcpconnect.py tcpconnlat.py
vagrant@ubuntu-jammy:~/bcc/tools$ ./tcpcon
tcpcong.py tcpconnect.py tcpconnlat.py
vagrant@ubuntu-jammy:~/bcc/tools$ ./tcpconnlat.py
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:41:9: warning: '__HAVE_BUILTIN_BSWAP32__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP32__
^
:4:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP32__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:42:9: warning: '__HAVE_BUILTIN_BSWAP64__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP64__
^
:5:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP64__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:43:9: warning: '__HAVE_BUILTIN_BSWAP16__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP16__
^
:3:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP16__ 1
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:41:
In file included from include/net/netprio_cgroup.h:11:
In file included from include/linux/cgroup.h:28:
In file included from include/linux/cgroup-defs.h:22:
In file included from include/linux/bpf-cgroup.h:5:
include/linux/bpf.h:211:35: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_timer'
memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
^ ~~~~~~~~~~~~~~~~~~
include/linux/bpf.h:211:49: note: forward declaration of 'struct bpf_timer'
memset(dst + map->timer_off, 0, sizeof(struct bpf_timer));
^
include/linux/bpf.h:225:10: error: invalid application of 'sizeof' to an incomplete type 'struct bpf_timer'
t_sz = sizeof(struct bpf_timer);
^ ~~~~~~~~~~~~~~~~~~
include/linux/bpf.h:225:24: note: forward declaration of 'struct bpf_timer'
t_sz = sizeof(struct bpf_timer);
^
include/linux/bpf.h:539:26: error: use of undeclared identifier 'BPF_PSEUDO_FUNC'
insn->src_reg == BPF_PSEUDO_FUNC;
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:59:
include/linux/filter.h:1518:44: error: use of undeclared identifier 'BPF_F_BROADCAST'; did you mean 'IFF_BROADCAST'?
if (unlikely(!ri->tgt_value) && !(flags & BPF_F_BROADCAST)) {
^~~~~~~~~~~~~~~
IFF_BROADCAST
include/uapi/linux/if.h:86:2: note: 'IFF_BROADCAST' declared here
IFF_BROADCAST = 1<<1, /* volatile */
^
In file included from /virtual/main.c:3:
In file included from include/net/sock.h:59:
include/linux/filter.h:1533:14: error: use of undeclared identifier 'BPF_F_BROADCAST'; did you mean 'IFF_BROADCAST'?
if (flags & BPF_F_BROADCAST) {
^~~~~~~~~~~~~~~
IFF_BROADCAST
include/uapi/linux/if.h:86:2: note: 'IFF_BROADCAST' declared here
IFF_BROADCAST = 1<<1, /* volatile */
^
3 warnings and 5 errors generated.
Traceback (most recent call last):
File "/home/vagrant/bcc/tools/./tcpconnlat.py", line 211, in
b = BPF(text=bpf_text)
File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 364, in __init__
raise Exception("Failed to compile BPF module %s" % (src_file or ""))
Exception: Failed to compile BPF module
```

## Code that can actually run on ubuntu22.04 machine.
- code which don't include header files under net/
```
from __future__ import print_function
from bcc import BPF
from bcc.utils import printb

bpf_source = r"""
#include
#include
#include

struct data_t {
u32 pid;
u64 ts;
char comm[TASK_COMM_LEN];
char fname[NAME_MAX];
u32 reason;
};

BPF_PERF_OUTPUT(events);

int kprobe__kfree_skb_reason(struct pt_regs *ctx, struct sk_buff *skb, enum skb_drop_reason reason) {
struct data_t data = { };

data.pid = bpf_get_current_pid_tgid();
data.ts = bpf_ktime_get_ns();

//if (bpf_get_current_comm(&data.comm, sizeof(data.comm)) == 0)
//{
// bpf_probe_read(&data.fname, sizeof(data.fname), (void *)filename);
//}

data.reason = (u32)reason;

events.perf_submit(ctx, &data, sizeof(data));

return 0;
}

b = BPF(text=bpf_source)
b.attach_kprobe(event="kfree_skb_reason", fn_name="kprobe__kfree_skb_reason")

print("%-18s %-16s %-6s %-16s %-18s" % ("TIME(s)", "COMM", "PID", "FILE", "REASON"))

start = 0
def print_event(cpu, data, size):
global start
event = b["events"].event(data)
if start == 0:
start = event.ts
time_s = (float(event.ts - start)) / 1000000000
print("%-18.9f %-16s %-6d %-16s %-18s" % (time_s, event.comm, event.pid, event.fname, event.reason))

b["events"].open_perf_buffer(print_event)
while 1:
try:
b.perf_buffer_poll()
except KeyboardInterrupt:
exit()

#b.trace_print()
```

- compile messages
- It has some warnings but works.
```
~/bcc-examples$ sudo python3 trace_kfree_skb_reason.py
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:41:9: warning: '__HAVE_BUILTIN_BSWAP32__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP32__
^
:4:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP32__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:42:9: warning: '__HAVE_BUILTIN_BSWAP64__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP64__
^
:5:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP64__ 1
^
In file included from :2:
In file included from /virtual/include/bcc/bpf.h:12:
In file included from include/linux/types.h:6:
In file included from include/uapi/linux/types.h:14:
In file included from include/uapi/linux/posix_types.h:5:
In file included from include/linux/stddef.h:5:
In file included from include/uapi/linux/stddef.h:5:
In file included from include/linux/compiler_types.h:80:
include/linux/compiler-clang.h:43:9: warning: '__HAVE_BUILTIN_BSWAP16__' macro redefined [-Wmacro-redefined]
#define __HAVE_BUILTIN_BSWAP16__
^
:3:9: note: previous definition is here
#define __HAVE_BUILTIN_BSWAP16__ 1
^
3 warnings generated.
TIME(s) COMM PID FILE REASON
```

Start by reproducing ./bcc/tools/tcpconnlat.py on the reported Ubuntu 22.04, BCC 0.25.0, and kernel versions. Read the include chain through include/net/sock.h, include/linux/bpf.h, and include/linux/filter.h, focusing on the reported incomplete type and missing identifiers. Done means tcpconnlat.py compiles and runs without these errors.

Written by the indexing model from the issue text.