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static unsigned int i2a(char* dest,unsigned int x) {

  register unsigned int tmp=x;

  register unsigned int len=0;

  if (x>=100) { *dest++=tmp/100+'0'; tmp=tmp%100; ++len; }

  if (x>=10) { *dest++=tmp/10+'0'; tmp=tmp%10; ++len; }

  *dest++=tmp+'0';

  return len+1;

}

char *inet_ntoa(unsigned long in) {

  static char buf[20];

  unsigned int len;

  unsigned char *ip=(unsigned char*)∈

  len=i2a(buf,ip[0]); buf[len]='.'; ++len;

  len+=i2a(buf+ len,ip[1]); buf[len]='.'; ++len;

  len+=i2a(buf+ len,ip[2]); buf[len]='.'; ++len;

  len+=i2a(buf+ len,ip[3]); buf[len]=0;

  return buf;

}

unsigned long inet_aton(const char *cp)

{

  unsigned long a[4];

  unsigned long ret;

  char *p = (char *)cp;

  int i,d;

  if (strcmp(cp, "255.255.255.255") == 0)

    return -1;

  for(i = 0; i < 4; i++) {

    a[i] = strtoul(p, 0, 0);

    for(d=1; (p[d] != '.') && (i < 3); d++);

    p = &p[d+1];

  }

  ret = (a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3];

  return ret;

}