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_priprity: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