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 */ 19 struct 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 */ 34 struct pfcphdr_node { 35 u8 seq_number[3]; 36 u8 reserved; 37 }; 38 39 /* PFCP session related messages */ 40 struct 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 54 struct pfcp_metadata { 55 u8 type; 56 __be64 seid; 57 } __packed; 58 59 enum { 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 pfcp_hdr(struct sk_buff * skb)69static inline struct pfcphdr *pfcp_hdr(struct sk_buff *skb) 70 { 71 return (struct pfcphdr *)(udp_hdr(skb) + 1); 72 } 73 pfcp_hdr_node(struct sk_buff * skb)74static inline struct pfcphdr_node *pfcp_hdr_node(struct sk_buff *skb) 75 { 76 return (struct pfcphdr_node *)(pfcp_hdr(skb) + 1); 77 } 78 pfcp_hdr_session(struct sk_buff * skb)79static inline struct pfcphdr_session *pfcp_hdr_session(struct sk_buff *skb) 80 { 81 return (struct pfcphdr_session *)(pfcp_hdr(skb) + 1); 82 } 83 netif_is_pfcp(const struct net_device * dev)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