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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PFCP_H_
#define _PFCP_H_
#include <uapi/linux/if_ether.h>
#include <net/dst_metadata.h>
#include <linux/netdevice.h>
#include <uapi/linux/ipv6.h>
#include <net/udp_tunnel.h>
#include <uapi/linux/udp.h>
#include <uapi/linux/ip.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/bits.h>
#define PFCP_PORT 8805
/* PFCP protocol header */
struct pfcphdr {
u8 flags;
u8 message_type;
__be16 message_length;
};
/* PFCP header flags */
#define PFCP_SEID_FLAG BIT(0)
#define PFCP_MP_FLAG BIT(1)
#define PFCP_VERSION_MASK GENMASK(4, 0)
#define PFCP_HLEN (sizeof(struct udphdr) + sizeof(struct pfcphdr))
/* PFCP node related messages */
struct pfcphdr_node {
u8 seq_number[3];
u8 reserved;
};
/* PFCP session related messages */
struct pfcphdr_session {
__be64 seid;
u8 seq_number[3];
#ifdef __LITTLE_ENDIAN_BITFIELD
u8 message_priority:4,
reserved:4;
#elif defined(__BIG_ENDIAN_BITFIELD)
u8 reserved:4,
message_priprity:4;
#else
#error "Please fix <asm/byteorder>"
#endif
};
struct pfcp_metadata {
u8 type;
__be64 seid;
} __packed;
enum {
PFCP_TYPE_NODE = 0,
PFCP_TYPE_SESSION = 1,
};
#define PFCP_HEADROOM (sizeof(struct iphdr) + sizeof(struct udphdr) + \
sizeof(struct pfcphdr) + sizeof(struct ethhdr))
#define PFCP6_HEADROOM (sizeof(struct ipv6hdr) + sizeof(struct udphdr) + \
sizeof(struct pfcphdr) + sizeof(struct ethhdr))
static inline struct pfcphdr *pfcp_hdr(struct sk_buff *skb)
{
return (struct pfcphdr *)(udp_hdr(skb) + 1);
}
static inline struct pfcphdr_node *pfcp_hdr_node(struct sk_buff *skb)
{
return (struct pfcphdr_node *)(pfcp_hdr(skb) + 1);
}
static inline struct pfcphdr_session *pfcp_hdr_session(struct sk_buff *skb)
{
return (struct pfcphdr_session *)(pfcp_hdr(skb) + 1);
}
static inline bool netif_is_pfcp(const struct net_device *dev)
{
return dev->rtnl_link_ops &&
!strcmp(dev->rtnl_link_ops->kind, "pfcp");
}
#endif
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