mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
556d299fcb
Add the common pimhdr structure and helpers to access it, also cleanup the format of the header file. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#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
|
|
#define PIM_REGISTER 1
|
|
|
|
#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);
|
|
}
|
|
|
|
static inline struct pimhdr *pim_hdr(const struct sk_buff *skb)
|
|
{
|
|
return (struct pimhdr *)skb_transport_header(skb);
|
|
}
|
|
|
|
static inline u8 pim_hdr_version(const struct pimhdr *pimhdr)
|
|
{
|
|
return pimhdr->type >> 4;
|
|
}
|
|
|
|
static inline u8 pim_hdr_type(const struct pimhdr *pimhdr)
|
|
{
|
|
return pimhdr->type & 0xf;
|
|
}
|
|
#endif
|