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