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// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include "bpf_tracing_net.h"
#include <bpf/bpf_helpers.h>
struct bpf_xfrm_info___local {
u32 if_id;
int link;
} __attribute__((preserve_access_index));
__u32 req_if_id;
__u32 resp_if_id;
int bpf_skb_set_xfrm_info(struct __sk_buff *skb_ctx,
const struct bpf_xfrm_info___local *from) __ksym;
int bpf_skb_get_xfrm_info(struct __sk_buff *skb_ctx,
struct bpf_xfrm_info___local *to) __ksym;
SEC("tc")
int set_xfrm_info(struct __sk_buff *skb)
{
struct bpf_xfrm_info___local info = { .if_id = req_if_id };
return bpf_skb_set_xfrm_info(skb, &info) ? TC_ACT_SHOT : TC_ACT_UNSPEC;
}
SEC("tc")
int get_xfrm_info(struct __sk_buff *skb)
{
struct bpf_xfrm_info___local info = {};
if (bpf_skb_get_xfrm_info(skb, &info) < 0)
return TC_ACT_SHOT;
resp_if_id = info.if_id;
return TC_ACT_UNSPEC;
}
char _license[] SEC("license") = "GPL";
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