1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _PFCP_H_
3#define _PFCP_H_
4
5#include <uapi/linux/if_ether.h>
6#include <net/dst_metadata.h>
7#include <linux/netdevice.h>
8#include <uapi/linux/ipv6.h>
9#include <net/udp_tunnel.h>
10#include <uapi/linux/udp.h>
11#include <uapi/linux/ip.h>
12#include <linux/string.h>
13#include <linux/types.h>
14#include <linux/bits.h>
15
16#define PFCP_PORT 8805
17
18/* PFCP protocol header */
19struct pfcphdr {
20 u8 flags;
21 u8 message_type;
22 __be16 message_length;
23};
24
25/* PFCP header flags */
26#define PFCP_SEID_FLAG BIT(0)
27#define PFCP_MP_FLAG BIT(1)
28
29#define PFCP_VERSION_MASK GENMASK(4, 0)
30
31#define PFCP_HLEN (sizeof(struct udphdr) + sizeof(struct pfcphdr))
32
33/* PFCP node related messages */
34struct pfcphdr_node {
35 u8 seq_number[3];
36 u8 reserved;
37};
38
39/* PFCP session related messages */
40struct pfcphdr_session {
41 __be64 seid;
42 u8 seq_number[3];
43#ifdef __LITTLE_ENDIAN_BITFIELD
44 u8 message_priority:4,
45 reserved:4;
46#elif defined(__BIG_ENDIAN_BITFIELD)
47 u8 reserved:4,
48 message_priority:4;
49#else
50#error "Please fix <asm/byteorder>"
51#endif
52};
53
54struct pfcp_metadata {
55 u8 type;
56 __be64 seid;
57} __packed;
58
59enum {
60 PFCP_TYPE_NODE = 0,
61 PFCP_TYPE_SESSION = 1,
62};
63
64#define PFCP_HEADROOM (sizeof(struct iphdr) + sizeof(struct udphdr) + \
65 sizeof(struct pfcphdr) + sizeof(struct ethhdr))
66#define PFCP6_HEADROOM (sizeof(struct ipv6hdr) + sizeof(struct udphdr) + \
67 sizeof(struct pfcphdr) + sizeof(struct ethhdr))
68
69static inline struct pfcphdr *pfcp_hdr(struct sk_buff *skb)
70{
71 return (struct pfcphdr *)(udp_hdr(skb) + 1);
72}
73
74static inline struct pfcphdr_node *pfcp_hdr_node(struct sk_buff *skb)
75{
76 return (struct pfcphdr_node *)(pfcp_hdr(skb) + 1);
77}
78
79static inline struct pfcphdr_session *pfcp_hdr_session(struct sk_buff *skb)
80{
81 return (struct pfcphdr_session *)(pfcp_hdr(skb) + 1);
82}
83
84static inline bool netif_is_pfcp(const struct net_device *dev)
85{
86 return dev->rtnl_link_ops &&
87 !strcmp(dev->rtnl_link_ops->kind, "pfcp");
88}
89
90#endif
91

source code of linux/include/net/pfcp.h