1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Cloudflare */
4 #include "bpf_tracing_net.h"
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_tracing.h>
9 char _license[] SEC("license") = "GPL";
12 __uint(type, BPF_MAP_TYPE_SOCKMAP);
13 __uint(max_entries, 64);
16 } sockmap SEC(".maps");
19 __uint(type, BPF_MAP_TYPE_SOCKHASH);
20 __uint(max_entries, 64);
23 } sockhash SEC(".maps");
26 __uint(type, BPF_MAP_TYPE_SOCKHASH);
27 __uint(max_entries, 64);
36 int copy(struct bpf_iter__sockmap *ctx)
38 struct sock *sk = ctx->sk;
39 __u32 tmp, *key = ctx->key;
47 /* We need a temporary buffer on the stack, since the verifier doesn't
48 * let us use the pointer from the context as an argument to the helper.
54 return bpf_map_update_elem(&dst, &tmp, sk, 0) != 0;
57 ret = bpf_map_delete_elem(&dst, &tmp);
58 return ret && ret != -ENOENT;