ReactOS 0.4.15-dev-8145-ga541a46
inet6.c File Reference
#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/inet.h"
Include dependency graph for inet6.c:

Go to the source code of this file.

Functions

static u32_t chksum (void *dataptr, u16_t len)
 
u16_t inet_chksum_pseudo (struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t proto, u32_t proto_len)
 
u16_t inet_chksum (void *dataptr, u16_t len)
 
u16_t inet_chksum_pbuf (struct pbuf *p)
 

Detailed Description

Functions common to all TCP/IPv6 modules, such as the Internet checksum and the byte order functions.

Definition in file inet6.c.

Function Documentation

◆ chksum()

static u32_t chksum ( void dataptr,
u16_t  len 
)
static

Definition at line 55 of file inet6.c.

56{
57 u16_t *sdataptr = dataptr;
58 u32_t acc;
59
60
61 for(acc = 0; len > 1; len -= 2) {
62 acc += *sdataptr++;
63 }
64
65 /* add up any odd byte */
66 if (len == 1) {
67 acc += htons((u16_t)(*(u8_t *)dataptr) << 8);
68 }
69
70 return acc;
71
72}
unsigned long u32_t
Definition: cc.h:25
unsigned char u8_t
Definition: cc.h:23
unsigned short u16_t
Definition: cc.h:24
GLenum GLsizei len
Definition: glext.h:6722
int const JOCTET * dataptr
Definition: jpeglib.h:1031
#define htons(x)
Definition: module.h:215

Referenced by GetPrivateProfileStructW(), inet_chksum(), inet_chksum_pbuf(), and inet_chksum_pseudo().

◆ inet_chksum()

u16_t inet_chksum ( void dataptr,
u16_t  len 
)

Definition at line 129 of file inet6.c.

130{
131 u32_t acc, sum;
132
133 acc = chksum(dataptr, len);
134 sum = (acc & 0xffff) + (acc >> 16);
135 sum += (sum >> 16);
136 return ~(sum & 0xffff);
137}
static u32_t chksum(void *dataptr, u16_t len)
Definition: inet6.c:55
static int sum(int x_, int y_)
Definition: ptr2_test.cpp:35

◆ inet_chksum_pbuf()

u16_t inet_chksum_pbuf ( struct pbuf p)

Calculate a checksum over a chain of pbufs (without pseudo-header, much like inet_chksum only pbufs are used).

Parameters
ppbuf chain over that the checksum should be calculated
Returns
checksum (as u16_t) to be saved directly in the protocol header

Definition at line 140 of file inet6.c.

141{
142 u32_t acc;
143 struct pbuf *q;
144 u8_t swapped;
145
146 acc = 0;
147 swapped = 0;
148 for(q = p; q != NULL; q = q->next) {
149 acc += chksum(q->payload, q->len);
150 while (acc >> 16) {
151 acc = (acc & 0xffff) + (acc >> 16);
152 }
153 if (q->len % 2 != 0) {
154 swapped = 1 - swapped;
155 acc = (acc & 0xff << 8) | (acc & 0xff00 >> 8);
156 }
157 }
158
159 if (swapped) {
160 acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
161 }
162 return ~(acc & 0xffff);
163}
#define NULL
Definition: types.h:112
GLdouble GLdouble GLdouble GLdouble q
Definition: gl.h:2063
GLfloat GLfloat p
Definition: glext.h:8902
struct define * next
Definition: compiler.c:65
Definition: pbuf.h:79

◆ inet_chksum_pseudo()

u16_t inet_chksum_pseudo ( struct pbuf p,
struct ip_addr src,
struct ip_addr dest,
u8_t  proto,
u32_t  proto_len 
)

Definition at line 80 of file inet6.c.

83{
84 u32_t acc;
85 struct pbuf *q;
86 u8_t swapped, i;
87
88 acc = 0;
89 swapped = 0;
90 for(q = p; q != NULL; q = q->next) {
91 acc += chksum(q->payload, q->len);
92 while (acc >> 16) {
93 acc = (acc & 0xffff) + (acc >> 16);
94 }
95 if (q->len % 2 != 0) {
96 swapped = 1 - swapped;
97 acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
98 }
99 }
100
101 if (swapped) {
102 acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
103 }
104
105 for(i = 0; i < 8; i++) {
106 acc += ((u16_t *)src->addr)[i] & 0xffff;
107 acc += ((u16_t *)dest->addr)[i] & 0xffff;
108 while (acc >> 16) {
109 acc = (acc & 0xffff) + (acc >> 16);
110 }
111 }
112 acc += (u16_t)htons((u16_t)proto);
113 acc += ((u16_t *)&proto_len)[0] & 0xffff;
114 acc += ((u16_t *)&proto_len)[1] & 0xffff;
115
116 while (acc >> 16) {
117 acc = (acc & 0xffff) + (acc >> 16);
118 }
119 return ~(acc & 0xffff);
120}
GLenum src
Definition: glext.h:6340
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
static char * dest
Definition: rtl.c:135