Architecture specific uIP functions

Files
file	uip_arch.h
file	btarch.h

Macros
#define	UIP_MIN(x, y)   (x)<(y)?(x):(y)
#define	MEM_ALIGNMENT   4
#define	MEM_ALIGN(mem)   ((void*)(((u32_t)(mem)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1)))
#define	MEM_ALIGN_SIZE(size)   (((size)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1))
#define	PACK_STRUCT_STRUCT   __attribute__((packed))
#define	PACK_STRUCT_FIELD(x)   x
#define	PACK_STRUCT_BEGIN
#define	PACK_STRUCT_END
#define	tcp_tmr_needed   tcpip_tmr_needed
#define	UIP_MEMCPY   uip_memcpy
#define	UIP_MEMSET   uip_memset
#define	MEM_ALIGNMENT   4
#define	MEM_ALIGN(mem)   ((void*)(((u32_t)(mem)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1)))
#define	MEM_ALIGN_SIZE(size)   (((size)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1))
#define	le64toh   bswap64
#define	MEMCPY   memcpy
#define	MEMSET   memset
#define	LOG(fmt, ...)
#define	ERROR(fmt, ...)

Functions
u16_t	uip_chksum (u16_t *buf, u32_t len)
u16_t	uip_ipchksum (void *dataptr, u16_t len)
u16_t	uip_ipchksum_pbuf (struct uip_pbuf *p)
u16_t	uip_chksum_pseudo (struct uip_pbuf *p, struct uip_ip_addr *src, struct uip_ip_addr *dst, u8_t proto, u16_t proto_len)
void	tcpip_tmr_needed ()
static __inline__ void	uip_memcpy (void *dest, const void *src, s32_t len)
static __inline__ void	uip_memset (void *dest, s32_t c, s32_t len)

Detailed Description

The functions in the architecture specific module implement the IP check sum and 32-bit additions.

The IP checksum calculation is the most computationally expensive operation in the TCP/IP stack and it therefore pays off to implement this in efficient assembler. The purpose of the uip-arch module is to let the checksum functions to be implemented in architecture specific assembler.

Macro Definition Documentation

ERROR

#define ERROR	(		fmt,
			...
	)

le64toh

#define le64toh   bswap64

LOG

#define LOG	(		fmt,
			...
	)

MEM_ALIGN [1/2]

#define MEM_ALIGN

(

mem

)

((void*)(((u32_t)(mem)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1)))

MEM_ALIGN [2/2]

#define MEM_ALIGN

(

mem

)

((void*)(((u32_t)(mem)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1)))

MEM_ALIGN_SIZE [1/2]

#define MEM_ALIGN_SIZE

(

size

)

(((size)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1))

MEM_ALIGN_SIZE [2/2]

#define MEM_ALIGN_SIZE

(

size

)

(((size)+MEM_ALIGNMENT-1)&~(u32_t)(MEM_ALIGNMENT-1))

MEM_ALIGNMENT [1/2]

#define MEM_ALIGNMENT   4

MEM_ALIGNMENT [2/2]

#define MEM_ALIGNMENT   4

MEMCPY

#define MEMCPY   memcpy

MEMSET

#define MEMSET   memset

PACK_STRUCT_BEGIN

#define PACK_STRUCT_BEGIN

PACK_STRUCT_END

#define PACK_STRUCT_END

PACK_STRUCT_FIELD

#define PACK_STRUCT_FIELD

(

x

)

x

PACK_STRUCT_STRUCT

#define PACK_STRUCT_STRUCT   __attribute__((packed))

tcp_tmr_needed

#define tcp_tmr_needed   tcpip_tmr_needed

UIP_MEMCPY

#define UIP_MEMCPY   uip_memcpy

UIP_MEMSET

#define UIP_MEMSET   uip_memset

UIP_MIN

#define UIP_MIN	(		x,
			y
	)		(x)<(y)?(x):(y)

Function Documentation

tcpip_tmr_needed()

void tcpip_tmr_needed

(

)

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uip_chksum()

u16_t uip_chksum	(	u16_t *	buf,
		u32_t	len
	)

Calculate the Internet checksum over a buffer.

The Internet checksum is the one's complement of the one's complement sum of all 16-bit words in the buffer.

See RFC1071.

Note

This function is not called in the current version of uIP, but future versions might make use of it.

Parameters

buf	A pointer to the buffer over which the checksum is to be computed.
len	The length of the buffer over which the checksum is to be computed.

Returns

The Internet checksum of the buffer.

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uip_chksum_pseudo()

u16_t uip_chksum_pseudo	(	struct uip_pbuf *	p,
		struct uip_ip_addr *	src,
		struct uip_ip_addr *	dst,
		u8_t	proto,
		u16_t	proto_len
	)

Calculate the TCP checksum of the packet in uip_buf and uip_appdata.

The TCP checksum is the Internet checksum of data contents of the TCP segment, and a pseudo-header as defined in RFC793.

Note

The uip_appdata pointer that points to the packet data may point anywhere in memory, so it is not possible to simply calculate the Internet checksum of the contents of the uip_buf buffer.

Returns

The TCP checksum of the TCP segment in uip_buf and pointed to by uip_appdata.

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uip_ipchksum()

u16_t uip_ipchksum	(	void *	dataptr,
		u16_t	len
	)

Calculate the IP header checksum of the packet header in uip_buf.

The IP header checksum is the Internet checksum of the 20 bytes of the IP header.

Returns

The IP header checksum of the IP header in the uip_buf buffer.

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uip_ipchksum_pbuf()

u16_t uip_ipchksum_pbuf

(

struct uip_pbuf *

p

)

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uip_memcpy()

static __inline__ void uip_memcpy ( void *  dest, const void *  src, s32_t  len  )

static

uip_memset()

static __inline__ void uip_memset ( void *  dest, s32_t  c, s32_t  len  )

static