54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 2022 Google LLC.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/bpf.h>
|
||
|
|
#include <bpf/bpf_helpers.h>
|
||
|
|
#include <bpf/bpf_endian.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
|
||
|
|
/* 2001:db8::1 */
|
||
|
|
#define BINDADDR_V6 { { { 0x20,0x01,0x0d,0xb8,0,0,0,0,0,0,0,0,0,0,0,1 } } }
|
||
|
|
|
||
|
|
__u32 do_bind = 0;
|
||
|
|
__u32 has_error = 0;
|
||
|
|
__u32 invocations_v4 = 0;
|
||
|
|
__u32 invocations_v6 = 0;
|
||
|
|
|
||
|
|
SEC("cgroup/connect4")
|
||
|
|
int connect_v4_prog(struct bpf_sock_addr *ctx)
|
||
|
|
{
|
||
|
|
struct sockaddr_in sa = {
|
||
|
|
.sin_family = AF_INET,
|
||
|
|
.sin_addr.s_addr = bpf_htonl(0x01010101),
|
||
|
|
};
|
||
|
|
|
||
|
|
__sync_fetch_and_add(&invocations_v4, 1);
|
||
|
|
|
||
|
|
if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
|
||
|
|
has_error = 1;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC("cgroup/connect6")
|
||
|
|
int connect_v6_prog(struct bpf_sock_addr *ctx)
|
||
|
|
{
|
||
|
|
struct sockaddr_in6 sa = {
|
||
|
|
.sin6_family = AF_INET6,
|
||
|
|
.sin6_addr = BINDADDR_V6,
|
||
|
|
};
|
||
|
|
|
||
|
|
__sync_fetch_and_add(&invocations_v6, 1);
|
||
|
|
|
||
|
|
if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
|
||
|
|
has_error = 1;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|