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// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#define AF_INET6 10
struct {
__uint(type, BPF_MAP_TYPE_SK_STORAGE);
__uint(map_flags, BPF_F_NO_PREALLOC);
__type(key, int);
__type(value, int);
} sockops_netns_cookies SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_SK_STORAGE);
__uint(map_flags, BPF_F_NO_PREALLOC);
__type(key, int);
__type(value, int);
} sk_msg_netns_cookies SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_SOCKMAP);
__uint(max_entries, 2);
__type(key, __u32);
__type(value, __u64);
} sock_map SEC(".maps");
SEC("sockops")
int get_netns_cookie_sockops(struct bpf_sock_ops *ctx)
{
struct bpf_sock *sk = ctx->sk;
int *cookie;
__u32 key = 0;
if (ctx->family != AF_INET6)
return 1;
if (!sk)
return 1;
switch (ctx->op) {
case BPF_SOCK_OPS_TCP_CONNECT_CB:
cookie = bpf_sk_storage_get(&sockops_netns_cookies, sk, 0,
BPF_SK_STORAGE_GET_F_CREATE);
if (!cookie)
return 1;
*cookie = bpf_get_netns_cookie(ctx);
break;
case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB:
bpf_sock_map_update(ctx, &sock_map, &key, BPF_NOEXIST);
break;
default:
break;
}
return 1;
}
SEC("sk_msg")
int get_netns_cookie_sk_msg(struct sk_msg_md *msg)
{
struct bpf_sock *sk = msg->sk;
int *cookie;
if (msg->family != AF_INET6)
return 1;
if (!sk)
return 1;
cookie = bpf_sk_storage_get(&sk_msg_netns_cookies, sk, 0,
BPF_SK_STORAGE_GET_F_CREATE);
if (!cookie)
return 1;
*cookie = bpf_get_netns_cookie(msg);
return 1;
}
char _license[] SEC("license") = "GPL";
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