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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pim.h (2737B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __LINUX_PIM_H
      3#define __LINUX_PIM_H
      4
      5#include <linux/skbuff.h>
      6#include <asm/byteorder.h>
      7
      8/* Message types - V1 */
      9#define PIM_V1_VERSION		cpu_to_be32(0x10000000)
     10#define PIM_V1_REGISTER		1
     11
     12/* Message types - V2 */
     13#define PIM_VERSION		2
     14
     15/* RFC7761, sec 4.9:
     16 *  Type
     17 *        Types for specific PIM messages.  PIM Types are:
     18 *
     19 *  Message Type                          Destination
     20 *  ---------------------------------------------------------------------
     21 *  0 = Hello                             Multicast to ALL-PIM-ROUTERS
     22 *  1 = Register                          Unicast to RP
     23 *  2 = Register-Stop                     Unicast to source of Register
     24 *                                        packet
     25 *  3 = Join/Prune                        Multicast to ALL-PIM-ROUTERS
     26 *  4 = Bootstrap                         Multicast to ALL-PIM-ROUTERS
     27 *  5 = Assert                            Multicast to ALL-PIM-ROUTERS
     28 *  6 = Graft (used in PIM-DM only)       Unicast to RPF'(S)
     29 *  7 = Graft-Ack (used in PIM-DM only)   Unicast to source of Graft
     30 *                                        packet
     31 *  8 = Candidate-RP-Advertisement        Unicast to Domain's BSR
     32 */
     33enum {
     34	PIM_TYPE_HELLO,
     35	PIM_TYPE_REGISTER,
     36	PIM_TYPE_REGISTER_STOP,
     37	PIM_TYPE_JOIN_PRUNE,
     38	PIM_TYPE_BOOTSTRAP,
     39	PIM_TYPE_ASSERT,
     40	PIM_TYPE_GRAFT,
     41	PIM_TYPE_GRAFT_ACK,
     42	PIM_TYPE_CANDIDATE_RP_ADV
     43};
     44
     45#define PIM_NULL_REGISTER	cpu_to_be32(0x40000000)
     46
     47/* RFC7761, sec 4.9:
     48 * The PIM header common to all PIM messages is:
     49 *   0                   1                   2                   3
     50 *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
     51 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     52 *  |PIM Ver| Type  |   Reserved    |           Checksum            |
     53 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     54 */
     55struct pimhdr {
     56	__u8	type;
     57	__u8	reserved;
     58	__be16	csum;
     59};
     60
     61/* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */
     62struct pimreghdr {
     63	__u8	type;
     64	__u8	reserved;
     65	__be16	csum;
     66	__be32	flags;
     67};
     68
     69int pim_rcv_v1(struct sk_buff *skb);
     70
     71static inline bool ipmr_pimsm_enabled(void)
     72{
     73	return IS_BUILTIN(CONFIG_IP_PIMSM_V1) || IS_BUILTIN(CONFIG_IP_PIMSM_V2);
     74}
     75
     76static inline struct pimhdr *pim_hdr(const struct sk_buff *skb)
     77{
     78	return (struct pimhdr *)skb_transport_header(skb);
     79}
     80
     81static inline u8 pim_hdr_version(const struct pimhdr *pimhdr)
     82{
     83	return pimhdr->type >> 4;
     84}
     85
     86static inline u8 pim_hdr_type(const struct pimhdr *pimhdr)
     87{
     88	return pimhdr->type & 0xf;
     89}
     90
     91/* check if the address is 224.0.0.13, RFC7761 sec 4.3.1 */
     92static inline bool pim_ipv4_all_pim_routers(__be32 addr)
     93{
     94	return addr == htonl(0xE000000D);
     95}
     96#endif