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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recvmsg6_prog.c (1000B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/stddef.h>
      4#include <linux/bpf.h>
      5#include <linux/in6.h>
      6#include <sys/socket.h>
      7
      8#include <bpf/bpf_helpers.h>
      9#include <bpf/bpf_endian.h>
     10
     11#include <bpf_sockopt_helpers.h>
     12
     13#define SERV6_IP_0		0xfaceb00c /* face:b00c:1234:5678::abcd */
     14#define SERV6_IP_1		0x12345678
     15#define SERV6_IP_2		0x00000000
     16#define SERV6_IP_3		0x0000abcd
     17#define SERV6_PORT		6060
     18
     19SEC("cgroup/recvmsg6")
     20int recvmsg6_prog(struct bpf_sock_addr *ctx)
     21{
     22	struct bpf_sock *sk;
     23	__u32 user_ip4;
     24	__u16 user_port;
     25
     26	sk = ctx->sk;
     27	if (!sk)
     28		return 1;
     29
     30	if (sk->family != AF_INET6)
     31		return 1;
     32
     33	if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM)
     34		return 1;
     35
     36	if (!get_set_sk_priority(ctx))
     37		return 1;
     38
     39	ctx->user_ip6[0] = bpf_htonl(SERV6_IP_0);
     40	ctx->user_ip6[1] = bpf_htonl(SERV6_IP_1);
     41	ctx->user_ip6[2] = bpf_htonl(SERV6_IP_2);
     42	ctx->user_ip6[3] = bpf_htonl(SERV6_IP_3);
     43	ctx->user_port = bpf_htons(SERV6_PORT);
     44
     45	return 1;
     46}
     47
     48char _license[] SEC("license") = "GPL";