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netbuf.h File Reference

Network buffer definitions. More...

#include <sys/types.h>

Go to the source code of this file.

Data Structures
struct	_NBDATA
	Data part of a network buffer structure. More...
struct	_NETBUF
	Network buffer structure. More...
Defines
#define	NBAF_DATALINK   0x10
	Datalink buffer allocated flag.
#define	NBAF_NETWORK   0x20
	Network buffer allocated flag.
#define	NBAF_TRANSPORT   0x40
	Transport buffer allocated flag.
#define	NBAF_APPLICATION   0x80
	Application buffer allocated flag.
#define	NBAF_ALL   0xf0
	Masks allocated buffer flags flag.
Typedefs
typedef _NETBUF	NETBUF
	Network buffer type.
typedef _NBDATA	NBDATA
	Network buffer data type.
Functions
NETBUF *	NutNetBufAlloc (NETBUF *nb, u_char type, u_short size)
	Allocate or re-allocate a network buffer part.
NETBUF *	NutNetBufClone (NETBUF *nb)
	Create a copy of an existing network buffer structure.
int	NutNetBufFree (NETBUF *nb)
	Release a network buffer structure.

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Detailed Description

Network buffer definitions.

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Function Documentation

NETBUF* NutNetBufAlloc (  NETBUF *    nb, u_char    type, u_short    size )

Allocate or re-allocate a network buffer part. Parameters: nb  Points to an existing network buffer structure or NULL, if a new structure should be created. type  Part of the buffer to be allocated. size  Size of the part to be allocated. Returns: Pointer to the allocated network buffer structure.

NETBUF* NutNetBufClone (  NETBUF *    nb )

Create a copy of an existing network buffer structure. Parameters: nb  Points to an existing network buffer structure, previously allocated by NutNetBufAlloc(). Returns: Pointer to a newly allocated copy.

int NutNetBufFree (  NETBUF *    nb )

Release a network buffer structure. Returns all memory previously allocated by a network buffer to the available heap space. Parameters: nb  Points to an existing network buffer structure, previously allocated by NutNetBufAlloc(). Returns: 0 if successfull or -1 if the structure contains previously released memory space.

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