xdp-locator.h

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#ifndef NDNDPDK_ETHFACE_XDP_LOCATOR_H
#define NDNDPDK_ETHFACE_XDP_LOCATOR_H

 
#ifdef __BPF__
// disable asm instructions
#define RTE_FORCE_INTRINSICS
#endif
 
#include "../core/common.h"
#include <rte_gtp.h>

typedef struct __rte_packed_begin EthXdpLocator {
  union {
    struct {
      uint8_t vni[3];       
      uint8_t rsvd1;        
      uint8_t inner[2 * 6]; 
    } vx;
    struct {
      uint32_t teid; 
      uint8_t qfi;   
    } gtp;
  };
  uint16_t vlan;        
  uint16_t udpSrc;      
  uint16_t udpDst;      
  uint8_t ether[2 * 6]; 
  uint8_t ip[2 * 16];   
} __rte_packed_end EthXdpLocator;

typedef struct __rte_packed_begin EthXdpHdr {
  uint64_t magic;  
  uint32_t fmv;    
  uint16_t hdrLen; 
} __rte_packed_end EthXdpHdr;

typedef struct __rte_packed_begin EthGtpHdr {
  struct rte_gtp_hdr hdr;
  struct rte_gtp_hdr_ext_word ext;
  struct rte_gtp_psc_generic_hdr psc;
  uint8_t next;
} __rte_packed_end EthGtpHdr;
 
enum {
  EthGtpExtTypePsc = 0x85,
};

__attribute__((nonnull)) static __rte_always_inline bool
EthGtpHdr_IsUplink(const EthGtpHdr* gtp) {
  return gtp->hdr.e == 1 && gtp->ext.next_ext == EthGtpExtTypePsc && gtp->psc.type == 1;
}
 
#ifndef __BPF__
 
typedef struct EthLocator EthLocator;

__attribute__((nonnull)) void
EthXdpLocator_Prepare(EthXdpLocator* xl, const EthLocator* loc);
 
#endif // __BPF__
 
#endif // NDNDPDK_ETHFACE_XDP_LOCATOR_H