Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ilya Leoshkevich |
84 |
36.68% |
1 |
14.29% |
| Daniel Borkmann |
71 |
31.00% |
1 |
14.29% |
| Sun Jian |
39 |
17.03% |
1 |
14.29% |
| Andrii Nakryiko |
24 |
10.48% |
2 |
28.57% |
| Yonghong Song |
8 |
3.49% |
1 |
14.29% |
| Kenta.Tada |
3 |
1.31% |
1 |
14.29% |
| Total |
229 |
|
7 |
|
// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
#include "bpf_misc.h"
struct test_pro_bss {
struct sockaddr_in old;
__u32 test_pid;
};
struct test_pro_bss bss;
static int handle_sys_connect_common(struct sockaddr_in *uservaddr)
{
struct sockaddr_in new;
__u32 cur = bpf_get_current_pid_tgid() >> 32;
if (bss.test_pid && cur != bss.test_pid)
return 0;
bpf_probe_read_user(&bss.old, sizeof(bss.old), uservaddr);
__builtin_memset(&new, 0xab, sizeof(new));
bpf_probe_write_user(uservaddr, &new, sizeof(new));
return 0;
}
SEC("ksyscall/connect")
int BPF_KSYSCALL(handle_sys_connect, int fd, struct sockaddr_in *uservaddr,
int addrlen)
{
return handle_sys_connect_common(uservaddr);
}
#if defined(bpf_target_s390)
#ifndef SYS_CONNECT
#define SYS_CONNECT 3
#endif
SEC("ksyscall/socketcall")
int BPF_KSYSCALL(handle_sys_socketcall, int call, unsigned long *args)
{
if (call == SYS_CONNECT) {
struct sockaddr_in *uservaddr;
bpf_probe_read_user(&uservaddr, sizeof(uservaddr), &args[1]);
return handle_sys_connect_common(uservaddr);
}
return 0;
}
#endif
char _license[] SEC("license") = "GPL";