cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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connect4_dropper.c (509B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <string.h>
      4
      5#include <linux/stddef.h>
      6#include <linux/bpf.h>
      7
      8#include <sys/socket.h>
      9
     10#include <bpf/bpf_helpers.h>
     11#include <bpf/bpf_endian.h>
     12
     13#define VERDICT_REJECT	0
     14#define VERDICT_PROCEED	1
     15
     16SEC("cgroup/connect4")
     17int connect_v4_dropper(struct bpf_sock_addr *ctx)
     18{
     19	if (ctx->type != SOCK_STREAM)
     20		return VERDICT_PROCEED;
     21	if (ctx->user_port == bpf_htons(60120))
     22		return VERDICT_REJECT;
     23	return VERDICT_PROCEED;
     24}
     25
     26char _license[] SEC("license") = "GPL";