api.h File Reference

#include "../../csrc/ethface/xdp-locator.h"
#include "../../csrc/ndni/an.h"
#include <linux/bpf.h>
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <bpf/bpf_endian.h>
#include <bpf/bpf_helpers.h>

Go to the source code of this file.

Data Structures
struct	vlanhdr
struct	vxlanhdr
struct	VxlanInnerHdr
struct	GtpInnerHdr

Macros
#define	PacketPtrAs_(ptr, size, ...)
#define	PacketPtrAs(ptr, ...)   PacketPtrAs_((ptr), ##__VA_ARGS__, sizeof(*(ptr)))
	Perform bounds-checking on packet pointer. More...

Typedefs
typedef struct VxlanInnerHdr	VxlanInnerHdr
typedef struct GtpInnerHdr	GtpInnerHdr

Enumerations
enum	{ UDPPortVXLAN = 4789 , UDPPortGTP = 2152 }

Variables
struct vlanhdr	__rte_packed

Macro Definition Documentation

PacketPtrAs

#define PacketPtrAs	(		ptr,
			...
	)		PacketPtrAs_((ptr), ##__VA_ARGS__, sizeof(*(ptr)))

Perform bounds-checking on packet pointer.

This can be used within an XDP program, where `struct xdp_md* ctx` is declared. If the structure dereferenced from the given pointer is within the bounds of the packet, this returns the pointer; otherwise, the packet is dropped.

const Header* hdr = PacketPtrAs((const Header*)pkt);
const Header* hdr = PacketPtrAs((const Header*)pkt, HDR_LEN);

PacketPtrAs_

#define PacketPtrAs_	(		ptr,
			size,
			...
	)

Value:

  __extension__({                                                                                  \
    if ((const uint8_t*)ptr + (size_t)(size) > (const uint8_t*)(long)ctx->data_end) {              \
      return XDP_DROP;                                                                             \
    }                                                                                              \
    pkt;                                                                                           \
  })

Typedef Documentation

GtpInnerHdr

typedef struct GtpInnerHdr GtpInnerHdr

VxlanInnerHdr

typedef struct VxlanInnerHdr VxlanInnerHdr

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
UDPPortVXLAN
UDPPortGTP

Variable Documentation

__rte_packed

struct vxlanhdr __rte_packed