inet.h File Reference

#include "lwip/opt.h"
#include "lwip/pbuf.h"
#include "lwip/ip_addr.h"

Include dependency graph for inet.h:

Go to the source code of this file.

Functions
u16_t	inet_chksum (void *data, u16_t len)
u16_t	inet_chksum_pbuf (struct pbuf *p)
u16_t	inet_chksum_pseudo (struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t proto, u32_t proto_len)
u32_t	inet_addr (const char *cp)
s8_t	inet_aton (const char *cp, struct in_addr *addr)
u16_t	htons (u16_t n)
u16_t	ntohs (u16_t n)
u32_t	htonl (u32_t n)
u32_t	ntohl (u32_t n)

Function Documentation

htonl()

u32_t htonl

(

u32_t

n

)

htons()

u16_t htons

(

u16_t

n

)

Definition at line 20 of file connect.c.

{
    return ((x & 0x00FF) << 8) | ((x & 0xFF00) >> 8);
}

inet_addr()

u32_t inet_addr

(

const char *

cp

)

Definition at line 307 of file address.c.

{
    ULONG Octets[4] = {0,0,0,0};
    ULONG i = 0;
 
    if(!AddrString)
        return -1;
 
    while(*AddrString)
        {
            CHAR c = *AddrString;
            AddrString++;
 
            if(c == '.')
                {
                    i++;
                    continue;
                }
 
            if(c < '0' || c > '9')
                return -1;
 
            Octets[i] *= 10;
            Octets[i] += (c - '0');
 
            if(Octets[i] > 255)
                return -1;
        }
 
    return (Octets[3] << 24) + (Octets[2] << 16) + (Octets[1] << 8) + Octets[0];
}

inet_aton()

s8_t inet_aton	(	const char *	cp,
		struct in_addr *	addr
	)

Definition at line 32 of file compat.c.

{
    ULONG Octets[4] = {0,0,0,0};
    ULONG i = 0;
 
    if(!cp)
        return 0;
 
    while(*cp)
    {
        CHAR c = *cp;
        cp++;
 
        if(c == '.')
        {
            i++;
            continue;
        }
 
        if(c < '0' || c > '9')
            return 0;
 
        Octets[i] *= 10;
        Octets[i] += (c - '0');
 
        if(Octets[i] > 255)
            return 0;
        }
 
    inp->S_un.S_addr = (Octets[3] << 24) + (Octets[2] << 16) + (Octets[1] << 8) + Octets[0];
    return 1;
}

inet_chksum()

u16_t inet_chksum	(	void *	data,
		u16_t	len
	)

Definition at line 396 of file inet_chksum.c.

{
  return ~LWIP_CHKSUM(dataptr, len);
}

Referenced by ip_input(), and tcp_create_segment_wnd().

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

p	pbuf chain over that the checksum should be calculated

Returns

checksum (as u16_t) to be saved directly in the protocol header

Definition at line 409 of file inet_chksum.c.

{
  u32_t acc;
  struct pbuf *q;
  u8_t swapped;
 
  acc = 0;
  swapped = 0;
  for(q = p; q != NULL; q = q->next) {
    acc += LWIP_CHKSUM(q->payload, q->len);
    acc = FOLD_U32T(acc);
    if (q->len % 2 != 0) {
      swapped = 1 - swapped;
      acc = SWAP_BYTES_IN_WORD(acc);
    }
  }
 
  if (swapped) {
    acc = SWAP_BYTES_IN_WORD(acc);
  }
  return (u16_t)~(acc & 0xffffUL);
}

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.

{
  u32_t acc;
  struct pbuf *q;
  u8_t swapped, i;
 
  acc = 0;
  swapped = 0;
  for(q = p; q != NULL; q = q->next) {    
    acc += chksum(q->payload, q->len);
    while (acc >> 16) {
      acc = (acc & 0xffff) + (acc >> 16);
    }
    if (q->len % 2 != 0) {
      swapped = 1 - swapped;
      acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
    }
  }
 
  if (swapped) {
    acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
  }
  
  for(i = 0; i < 8; i++) {
    acc += ((u16_t *)src->addr)[i] & 0xffff;
    acc += ((u16_t *)dest->addr)[i] & 0xffff;
    while (acc >> 16) {
      acc = (acc & 0xffff) + (acc >> 16);
    }
  }
  acc += (u16_t)htons((u16_t)proto);
  acc += ((u16_t *)&proto_len)[0] & 0xffff;
  acc += ((u16_t *)&proto_len)[1] & 0xffff;
 
  while (acc >> 16) {
    acc = (acc & 0xffff) + (acc >> 16);
  }
  return ~(acc & 0xffff);
}

ntohl()

u32_t ntohl

(

u32_t

n

)

ntohs()

u16_t ntohs

(

u16_t

n

)