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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utils.c (1214B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/* Utility routines
      3 *
      4 * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#include <linux/ip.h>
      9#include <linux/ipv6.h>
     10#include <linux/udp.h>
     11#include "ar-internal.h"
     12
     13/*
     14 * Fill out a peer address from a socket buffer containing a packet.
     15 */
     16int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *srx, struct sk_buff *skb)
     17{
     18	memset(srx, 0, sizeof(*srx));
     19
     20	switch (ntohs(skb->protocol)) {
     21	case ETH_P_IP:
     22		srx->transport_type = SOCK_DGRAM;
     23		srx->transport_len = sizeof(srx->transport.sin);
     24		srx->transport.sin.sin_family = AF_INET;
     25		srx->transport.sin.sin_port = udp_hdr(skb)->source;
     26		srx->transport.sin.sin_addr.s_addr = ip_hdr(skb)->saddr;
     27		return 0;
     28
     29#ifdef CONFIG_AF_RXRPC_IPV6
     30	case ETH_P_IPV6:
     31		srx->transport_type = SOCK_DGRAM;
     32		srx->transport_len = sizeof(srx->transport.sin6);
     33		srx->transport.sin6.sin6_family = AF_INET6;
     34		srx->transport.sin6.sin6_port = udp_hdr(skb)->source;
     35		srx->transport.sin6.sin6_addr = ipv6_hdr(skb)->saddr;
     36		return 0;
     37#endif
     38
     39	default:
     40		pr_warn_ratelimited("AF_RXRPC: Unknown eth protocol %u\n",
     41				    ntohs(skb->protocol));
     42		return -EAFNOSUPPORT;
     43	}
     44}