| 1 |
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| 2 | #ifndef _GTP_H_
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| 3 | #define _GTP_H_
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| 4 |
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| 5 | #include <linux/netdevice.h>
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| 6 | #include <linux/types.h>
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| 7 | #include <net/rtnetlink.h>
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| 8 |
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| 9 |
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| 10 |
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| 11 | #define GTP0_PORT 3386
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| 12 | #define GTP1U_PORT 2152
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| 13 |
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| 14 |
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| 15 | #define GTP_ECHO_REQ 1
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| 16 | #define GTP_ECHO_RSP 2
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| 17 | #define GTP_TPDU 255
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| 18 |
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| 19 | #define GTPIE_RECOVERY 14
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| 20 |
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| 21 | struct gtp0_header {
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| 22 | __u8 flags;
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| 23 | __u8 type;
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| 24 | __be16 length;
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| 25 | __be16 seq;
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| 26 | __be16 flow;
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| 27 | __u8 number;
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| 28 | __u8 spare[3];
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| 29 | __be64 tid;
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| 30 | } __attribute__ ((packed));
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| 31 |
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| 32 | struct gtp1_header {
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| 33 | __u8 flags;
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| 34 | __u8 type;
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| 35 | __be16 length;
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| 36 | __be32 tid;
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| 37 | } __attribute__ ((packed));
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| 38 |
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| 39 | struct gtp1_header_long {
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| 40 | __u8 flags;
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| 41 | __u8 type;
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| 42 | __be16 length;
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| 43 | __be32 tid;
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| 44 | __be16 seq;
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| 45 | __u8 npdu;
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| 46 | __u8 next;
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| 47 | } __packed;
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| 48 |
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| 49 |
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| 50 | struct gtp_ie {
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| 51 | __u8 tag;
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| 52 | __u8 val;
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| 53 | } __packed;
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| 54 |
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| 55 | struct gtp0_packet {
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| 56 | struct gtp0_header gtp0_h;
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| 57 | struct gtp_ie ie;
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| 58 | } __packed;
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| 59 |
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| 60 | struct gtp1u_packet {
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| 61 | struct gtp1_header_long gtp1u_h;
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| 62 | struct gtp_ie ie;
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| 63 | } __packed;
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| 64 |
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| 65 | struct gtp_pdu_session_info {
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| 66 | u8 pdu_type;
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| 67 | u8 qfi;
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| 68 | };
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| 69 |
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| 70 | static inline bool netif_is_gtp(const struct net_device *dev)
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| 71 | {
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| 72 | return dev->rtnl_link_ops &&
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| 73 | !strcmp(dev->rtnl_link_ops->kind, "gtp");
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| 74 | }
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| 75 |
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| 76 | #define GTP1_F_NPDU 0x01
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| 77 | #define GTP1_F_SEQ 0x02
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| 78 | #define GTP1_F_EXTHDR 0x04
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| 79 | #define GTP1_F_MASK 0x07
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| 80 |
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| 81 | struct gtp_ext_hdr {
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| 82 | __u8 len;
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| 83 | __u8 data[];
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| 84 | };
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| 85 |
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| 86 | #endif
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