in_cksum.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/systm.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <machine/in_cksum.h>

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Data Structures
union	l_util
union	q_util
struct	cksum_skip_partial_args

Macros
#define	ADDCARRY(x)   (x > 65535 ? x -= 65535 : x)
#define	REDUCE32
#define	REDUCE16

Functions
	__FBSDID ("$FreeBSD$")
static u_int64_t	in_cksumdata (const void *buf, int len)
u_short	in_addword (u_short a, u_short b)
u_short	in_pseudo (u_int32_t a, u_int32_t b, u_int32_t c)
static int	in_cksum_skip_partial (void *arg, void *data, u_int len)
u_short	in_cksum_skip (struct mbuf *m, int len, int skip)
u_int	in_cksum_hdr (const struct ip *ip)

Variables
static const u_int32_t	in_masks []

Macro Definition Documentation

ADDCARRY

#define ADDCARRY

(

x

)

(x > 65535 ? x -= 65535 : x)

Definition at line 66 of file in_cksum.c.

REDUCE16

#define REDUCE16

Value:

    {                                                                     \
        q_util.q = sum;                                                   \
        l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
        sum = l_util.s[0] + l_util.s[1];                                  \
        ADDCARRY(sum);                                                    \
    }

Definition at line 72 of file in_cksum.c.

REDUCE32

#define REDUCE32

Value:

    {                                                                     \
        q_util.q = sum;                                                   \
        sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3];      \
    }

Definition at line 67 of file in_cksum.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

in_addword()

u_short in_addword	(	u_short	a,
		u_short	b
	)

Definition at line 188 of file in_cksum.c.

References ADDCARRY.

Referenced by tcp_lro_rx_csum_data().

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in_cksum_hdr()

u_int in_cksum_hdr

(

const struct ip *

ip

)

Definition at line 249 of file in_cksum.c.

References in_cksumdata(), and REDUCE16.

Referenced by ip_input().

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in_cksum_skip()

u_short in_cksum_skip	(	struct mbuf *	m,
		int	len,
		int	skip
	)

Definition at line 228 of file in_cksum.c.

References cksum_skip_partial_args::clen, cksum_skip_partial_args::csum, in_cksum_skip_partial(), and REDUCE16.

Referenced by in_delayed_cksum(), and siftr_chkpkt().

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in_cksum_skip_partial()

static int in_cksum_skip_partial ( void *  arg, void *  data, u_int  len  )

static

Definition at line 214 of file in_cksum.c.

References cksum_skip_partial_args::clen, cksum_skip_partial_args::csum, and in_cksumdata().

Referenced by in_cksum_skip().

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in_cksumdata()

static u_int64_t in_cksumdata ( const void *  buf, int  len  )

static

Definition at line 107 of file in_cksum.c.

References in_masks, and REDUCE32.

Referenced by in_cksum_hdr(), and in_cksum_skip_partial().

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in_pseudo()

u_short in_pseudo	(	u_int32_t	a,
		u_int32_t	b,
		u_int32_t	c
	)

Definition at line 197 of file in_cksum.c.

References REDUCE16.

Referenced by bbr_output_wtime(), ctf_get_enet_type(), in_gre_attach(), rack_fast_output(), rack_fast_rsm_output(), rack_output(), sctp_lowlevel_chunk_output(), sctp_send_resp_msg(), syncache_respond(), tcp_default_output(), tcp_input_with_port(), tcp_lro_rx_csum_data(), tcp_respond(), and tcp_twrespond().

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Variable Documentation

in_masks

const u_int32_t in_masks[]

static

Initial value:

= {
 
                 
        0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, 
        0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, 
        0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, 
        0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, 
 
 
 
 
 
 
 
}

Definition at line 80 of file in_cksum.c.

Referenced by in_cksumdata().