ipv4.h File Reference

The IPv4 header. More...

#include "rohc_utils.h"
#include <stdint.h>
#include "config.h"

Include dependency graph for ipv4.h:

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Data Structures
struct	ipv4_hdr
	The IPv4 header. More...
Defines
#define	IPV4_ADDR_FORMAT "%02x%02x%02x%02x (%u.%u.%u.%u)"
#define	IPV4_ADDR_RAW(x)
#define	IPV4_RF 0x8000
#define	IPV4_DF 0x4000
#define	IPV4_MF 0x2000
#define	IPV4_OFFMASK 0x1fff
Functions
static bool	ipv4_is_fragment (const struct ipv4_hdr *const ipv4)
	Whether the IPv4 packet is fragmented or not.

Detailed Description

The IPv4 header.

#define IPV4_ADDR_FORMAT "%02x%02x%02x%02x (%u.%u.%u.%u)"

The format to print an IPv4 address

#define IPV4_ADDR_RAW ( x )

Value:

(x)[0], (x)[1], (x)[2], (x)[3], \
        (x)[0], (x)[1], (x)[2], (x)[3]

The data to print an IPv4 address in raw format

#define IPV4_DF 0x4000

Mask for Don't Fragment (DF) flag

#define IPV4_MF 0x2000

Mask for More Fragments (MF) flag

#define IPV4_OFFMASK 0x1fff

mask for Fragment Offset field

#define IPV4_RF 0x8000

Mask for reserved flag

static bool ipv4_is_fragment ( const struct ipv4_hdr *const ipv4 ) [inline, static]

Whether the IPv4 packet is fragmented or not.

The IPv4 packet shall be at least sizeof(struct ipv4_hdr) long.

Parameters:

ipv4

The IPv4 packet to check

Returns:: true if the IPv4 packet is a fragment, false if the IPv4 packet is not a fragment