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Release 4.15 include/linux/pim.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_PIM_H

#define __LINUX_PIM_H

#include <linux/skbuff.h>
#include <asm/byteorder.h>

/* Message types - V1 */

#define PIM_V1_VERSION		cpu_to_be32(0x10000000)

#define PIM_V1_REGISTER		1

/* Message types - V2 */

#define PIM_VERSION		2

/* RFC7761, sec 4.9:
 *  Type
 *        Types for specific PIM messages.  PIM Types are:
 *
 *  Message Type                          Destination
 *  ---------------------------------------------------------------------
 *  0 = Hello                             Multicast to ALL-PIM-ROUTERS
 *  1 = Register                          Unicast to RP
 *  2 = Register-Stop                     Unicast to source of Register
 *                                        packet
 *  3 = Join/Prune                        Multicast to ALL-PIM-ROUTERS
 *  4 = Bootstrap                         Multicast to ALL-PIM-ROUTERS
 *  5 = Assert                            Multicast to ALL-PIM-ROUTERS
 *  6 = Graft (used in PIM-DM only)       Unicast to RPF'(S)
 *  7 = Graft-Ack (used in PIM-DM only)   Unicast to source of Graft
 *                                        packet
 *  8 = Candidate-RP-Advertisement        Unicast to Domain's BSR
 */
enum {
	
PIM_TYPE_HELLO,
	
PIM_TYPE_REGISTER,
	
PIM_TYPE_REGISTER_STOP,
	
PIM_TYPE_JOIN_PRUNE,
	
PIM_TYPE_BOOTSTRAP,
	
PIM_TYPE_ASSERT,
	
PIM_TYPE_GRAFT,
	
PIM_TYPE_GRAFT_ACK,
	
PIM_TYPE_CANDIDATE_RP_ADV
};


#define PIM_NULL_REGISTER	cpu_to_be32(0x40000000)

/* RFC7761, sec 4.9:
 * The PIM header common to all PIM messages is:
 *   0                   1                   2                   3
 *   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
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 *  |PIM Ver| Type  |   Reserved    |           Checksum            |
 *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 */

struct pimhdr {
	
__u8	type;
	
__u8	reserved;
	
__be16	csum;
};

/* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */

struct pimreghdr {
	
__u8	type;
	
__u8	reserved;
	
__be16	csum;
	
__be32	flags;
};

int pim_rcv_v1(struct sk_buff *skb);


static inline bool ipmr_pimsm_enabled(void) { return IS_BUILTIN(CONFIG_IP_PIMSM_V1) || IS_BUILTIN(CONFIG_IP_PIMSM_V2); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov20100.00%1100.00%
Total20100.00%1100.00%


static inline struct pimhdr *pim_hdr(const struct sk_buff *skb) { return (struct pimhdr *)skb_transport_header(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov26100.00%1100.00%
Total26100.00%1100.00%


static inline u8 pim_hdr_version(const struct pimhdr *pimhdr) { return pimhdr->type >> 4; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov20100.00%1100.00%
Total20100.00%1100.00%


static inline u8 pim_hdr_type(const struct pimhdr *pimhdr) { return pimhdr->type & 0xf; }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov20100.00%1100.00%
Total20100.00%1100.00%

/* check if the address is 224.0.0.13, RFC7761 sec 4.3.1 */
static inline bool pim_ipv4_all_pim_routers(__be32 addr) { return addr == htonl(0xE000000D); }

Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov18100.00%1100.00%
Total18100.00%1100.00%

#endif

Overall Contributors

PersonTokensPropCommitsCommitProp
Nikolay Aleksandrov14672.28%457.14%
Hideaki Yoshifuji / 吉藤英明5326.24%114.29%
Harvey Harrison20.99%114.29%
Greg Kroah-Hartman10.50%114.29%
Total202100.00%7100.00%
Directory: include/linux
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