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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Cloudflare */
#include "bpf_iter.h"
#include "bpf_tracing_net.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <errno.h>
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_SOCKMAP);
__uint(max_entries, 64);
__type(key, __u32);
__type(value, __u64);
} sockmap SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_SOCKHASH);
__uint(max_entries, 64);
__type(key, __u32);
__type(value, __u64);
} sockhash SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_SOCKHASH);
__uint(max_entries, 64);
__type(key, __u32);
__type(value, __u64);
} dst SEC(".maps");
__u32 elems = 0;
__u32 socks = 0;
SEC("iter/sockmap")
int copy(struct bpf_iter__sockmap *ctx)
{
struct sock *sk = ctx->sk;
__u32 tmp, *key = ctx->key;
int ret;
if (!key)
return 0;
elems++;
/* We need a temporary buffer on the stack, since the verifier doesn't
* let us use the pointer from the context as an argument to the helper.
*/
tmp = *key;
if (sk) {
socks++;
return bpf_map_update_elem(&dst, &tmp, sk, 0) != 0;
}
ret = bpf_map_delete_elem(&dst, &tmp);
return ret && ret != -ENOENT;
}
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