forked from Qortal/Brooklyn
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24 lines
593 B
24 lines
593 B
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/bpf.h> |
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#include <bpf/bpf_helpers.h> |
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#include "xdpsock.h" |
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/* This XDP program is only needed for the XDP_SHARED_UMEM mode. |
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* If you do not use this mode, libbpf can supply an XDP program for you. |
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*/ |
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struct { |
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__uint(type, BPF_MAP_TYPE_XSKMAP); |
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__uint(max_entries, MAX_SOCKS); |
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__uint(key_size, sizeof(int)); |
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__uint(value_size, sizeof(int)); |
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} xsks_map SEC(".maps"); |
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static unsigned int rr; |
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SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx) |
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{ |
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rr = (rr + 1) & (MAX_SOCKS - 1); |
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return bpf_redirect_map(&xsks_map, rr, XDP_DROP); |
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}
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