Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andrey Ignatov |
150 |
54.95% |
1 |
25.00% |
| Stanislav Fomichev |
88 |
32.23% |
1 |
25.00% |
| Andrii Nakryiko |
35 |
12.82% |
2 |
50.00% |
| Total |
273 |
|
4 |
|
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2018 Facebook
#include <linux/bpf.h>
#include <sys/socket.h>
#include "bpf_helpers.h"
#include "bpf_endian.h"
struct socket_cookie {
__u64 cookie_key;
__u32 cookie_value;
};
struct {
__uint(type, BPF_MAP_TYPE_SK_STORAGE);
__uint(map_flags, BPF_F_NO_PREALLOC);
__type(key, int);
__type(value, struct socket_cookie);
} socket_cookies SEC(".maps");
SEC("cgroup/connect6")
int set_cookie(struct bpf_sock_addr *ctx)
{
struct socket_cookie *p;
if (ctx->family != AF_INET6 || ctx->user_family != AF_INET6)
return 1;
p = bpf_sk_storage_get(&socket_cookies, ctx->sk, 0,
BPF_SK_STORAGE_GET_F_CREATE);
if (!p)
return 1;
p->cookie_value = 0xFF;
p->cookie_key = bpf_get_socket_cookie(ctx);
return 1;
}
SEC("sockops")
int update_cookie(struct bpf_sock_ops *ctx)
{
struct bpf_sock *sk;
struct socket_cookie *p;
if (ctx->family != AF_INET6)
return 1;
if (ctx->op != BPF_SOCK_OPS_TCP_CONNECT_CB)
return 1;
if (!ctx->sk)
return 1;
p = bpf_sk_storage_get(&socket_cookies, ctx->sk, 0, 0);
if (!p)
return 1;
if (p->cookie_key != bpf_get_socket_cookie(ctx))
return 1;
p->cookie_value = (ctx->local_port << 8) | p->cookie_value;
return 1;
}
int _version SEC("version") = 1;
char _license[] SEC("license") = "GPL";