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