1// SPDX-License-Identifier: GPL-2.0-only
2
3/*
4 * Copyright 2022 Google LLC.
5 */
6
7#include <linux/bpf.h>
8#include <bpf/bpf_helpers.h>
9#include <bpf/bpf_endian.h>
10#include <netinet/in.h>
11#include <sys/socket.h>
12
13/* 2001:db8::1 */
14#define BINDADDR_V6 { { { 0x20,0x01,0x0d,0xb8,0,0,0,0,0,0,0,0,0,0,0,1 } } }
15
16__u32 do_bind = 0;
17__u32 has_error = 0;
18__u32 invocations_v4 = 0;
19__u32 invocations_v6 = 0;
20
21SEC("cgroup/connect4")
22int connect_v4_prog(struct bpf_sock_addr *ctx)
23{
24	struct sockaddr_in sa = {
25		.sin_family = AF_INET,
26		.sin_addr.s_addr = bpf_htonl(0x01010101),
27	};
28
29	__sync_fetch_and_add(&invocations_v4, 1);
30
31	if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
32		has_error = 1;
33
34	return 1;
35}
36
37SEC("cgroup/connect6")
38int connect_v6_prog(struct bpf_sock_addr *ctx)
39{
40	struct sockaddr_in6 sa = {
41		.sin6_family = AF_INET6,
42		.sin6_addr = BINDADDR_V6,
43	};
44
45	__sync_fetch_and_add(&invocations_v6, 1);
46
47	if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
48		has_error = 1;
49
50	return 1;
51}
52
53char _license[] SEC("license") = "GPL";
54