1*58c449a9SYiFei Zhu // SPDX-License-Identifier: GPL-2.0-only
2*58c449a9SYiFei Zhu
3*58c449a9SYiFei Zhu /*
4*58c449a9SYiFei Zhu * Copyright 2022 Google LLC.
5*58c449a9SYiFei Zhu */
6*58c449a9SYiFei Zhu
7*58c449a9SYiFei Zhu #include <linux/bpf.h>
8*58c449a9SYiFei Zhu #include <bpf/bpf_helpers.h>
9*58c449a9SYiFei Zhu #include <bpf/bpf_endian.h>
10*58c449a9SYiFei Zhu #include <netinet/in.h>
11*58c449a9SYiFei Zhu #include <sys/socket.h>
12*58c449a9SYiFei Zhu
13*58c449a9SYiFei Zhu /* 2001:db8::1 */
14*58c449a9SYiFei Zhu #define BINDADDR_V6 { { { 0x20,0x01,0x0d,0xb8,0,0,0,0,0,0,0,0,0,0,0,1 } } }
15*58c449a9SYiFei Zhu
16*58c449a9SYiFei Zhu __u32 do_bind = 0;
17*58c449a9SYiFei Zhu __u32 has_error = 0;
18*58c449a9SYiFei Zhu __u32 invocations_v4 = 0;
19*58c449a9SYiFei Zhu __u32 invocations_v6 = 0;
20*58c449a9SYiFei Zhu
21*58c449a9SYiFei Zhu SEC("cgroup/connect4")
connect_v4_prog(struct bpf_sock_addr * ctx)22*58c449a9SYiFei Zhu int connect_v4_prog(struct bpf_sock_addr *ctx)
23*58c449a9SYiFei Zhu {
24*58c449a9SYiFei Zhu struct sockaddr_in sa = {
25*58c449a9SYiFei Zhu .sin_family = AF_INET,
26*58c449a9SYiFei Zhu .sin_addr.s_addr = bpf_htonl(0x01010101),
27*58c449a9SYiFei Zhu };
28*58c449a9SYiFei Zhu
29*58c449a9SYiFei Zhu __sync_fetch_and_add(&invocations_v4, 1);
30*58c449a9SYiFei Zhu
31*58c449a9SYiFei Zhu if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
32*58c449a9SYiFei Zhu has_error = 1;
33*58c449a9SYiFei Zhu
34*58c449a9SYiFei Zhu return 1;
35*58c449a9SYiFei Zhu }
36*58c449a9SYiFei Zhu
37*58c449a9SYiFei Zhu SEC("cgroup/connect6")
connect_v6_prog(struct bpf_sock_addr * ctx)38*58c449a9SYiFei Zhu int connect_v6_prog(struct bpf_sock_addr *ctx)
39*58c449a9SYiFei Zhu {
40*58c449a9SYiFei Zhu struct sockaddr_in6 sa = {
41*58c449a9SYiFei Zhu .sin6_family = AF_INET6,
42*58c449a9SYiFei Zhu .sin6_addr = BINDADDR_V6,
43*58c449a9SYiFei Zhu };
44*58c449a9SYiFei Zhu
45*58c449a9SYiFei Zhu __sync_fetch_and_add(&invocations_v6, 1);
46*58c449a9SYiFei Zhu
47*58c449a9SYiFei Zhu if (do_bind && bpf_bind(ctx, (struct sockaddr *)&sa, sizeof(sa)))
48*58c449a9SYiFei Zhu has_error = 1;
49*58c449a9SYiFei Zhu
50*58c449a9SYiFei Zhu return 1;
51*58c449a9SYiFei Zhu }
52*58c449a9SYiFei Zhu
53*58c449a9SYiFei Zhu char _license[] SEC("license") = "GPL";
54