inet.h File Reference

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

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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)
int	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)

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Function Documentation

u32_t htonl (  u32_t  n  )

u16_t htons (  u16_t  n  )

u32_t inet_addr (  const char *  cp  )

Definition at line 221 of file inet.c. References INADDR_NONE, inet_aton(), in_addr::s_addr, and u32_t. Referenced by dns_client(), and fake_hostent(). { struct in_addr val; if (inet_aton(cp, &val)) { return (val.s_addr); } return (INADDR_NONE); }

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

Definition at line 240 of file inet.c. References htonl, in_addr::s_addr, and u32_t. Referenced by dns_client(), inet_addr(), and sock_udpclient(). { u32_t val; int base, n; char c; // u_int parts[4]; // u_int *pp = parts; u32_t parts[4]; u32_t* pp = parts; c = *cp; for (;;) { /* * Collect number up to ``.''. * Values are specified as for C: * 0x=hex, 0=octal, isdigit=decimal. */ if (!isdigit(c)) return (0); val = 0; base = 10; if (c == '0') { c = *++cp; if (c == 'x' || c == 'X') base = 16, c = *++cp; else base = 8; } for (;;) { if (isascii(c) && isdigit(c)) { val = (val * base) + (c - '0'); c = *++cp; } else if (base == 16 && isascii(c) && isxdigit(c)) { val = (val << 4) | (c + 10 - (islower(c) ? 'a' : 'A')); c = *++cp; } else break; } if (c == '.') { /* * Internet format: * a.b.c.d * a.b.c (with c treated as 16 bits) * a.b (with b treated as 24 bits) */ if (pp >= parts + 3) return (0); *pp++ = val; c = *++cp; } else break; } /* * Check for trailing characters. */ if (c != '\0' && (!isascii(c) || !isspace(c))) return (0); /* * Concoct the address according to * the number of parts specified. */ n = pp - parts + 1; switch (n) { case 0: return (0); /* initial nondigit */ case 1: /* a -- 32 bits */ break; case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) return (0); val |= parts[0] << 24; break; case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) return (0); val |= (parts[0] << 24) | (parts[1] << 16); break; case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) return (0); val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr) addr->s_addr = htonl(val); return (1); }

u16_t inet_chksum (  void *  data, u16_t  len )

Definition at line 141 of file inet.c. References chksum(), len, lwip_chksum(), u16_t, and u32_t. Referenced by icmp_dest_unreach(), icmp_time_exceeded(), ip_frag(), ip_input(), ip_output_if(), and ip_reass(). { u32_t acc; acc = lwip_chksum(dataptr, len); while(acc >> 16) { acc = (acc & 0xffff) + (acc >> 16); } return ~(acc & 0xffff); }

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u16_t inet_chksum_pbuf (  struct pbuf *  p  )

Definition at line 153 of file inet.c. References chksum(), lwip_chksum(), NULL, u32_t, and u8_t. Referenced by icmp_input(). { 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); while(acc >> 16) { acc = (acc & 0xffffUL) + (acc >> 16); } if(q->len % 2 != 0) { swapped = 1 - swapped; acc = (acc & 0x00ffUL << 8) | (acc & 0xff00UL >> 8); } } if(swapped) { acc = ((acc & 0x00ffUL) << 8) | ((acc & 0xff00UL) >> 8); } return ~(acc & 0xffffUL); }

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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 90 of file inet6.c. References ip_addr::addr, chksum(), htons, NULL, u16_t, u32_t, and u8_t. Referenced by icmp_input(). { 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); }

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u32_t ntohl (  u32_t  n  )

u16_t ntohs (  u16_t  n  )

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