} else if(c >= '0' || c <= '9') {
} else if(c >= '0' && c <= '9') {
uip_main_ipaddrconv(char *addrstr, unsigned char *ipaddr){  unsigned char tmp;  char c;  unsigned char i, j;  tmp = 0;    for(i = 0; i < 4; ++i) {    j = 0;    do {      c = *addrstr;      ++j;      if(j > 4) {	return 0;      }      if(c == '.' || c == 0) {	*ipaddr = tmp;	++ipaddr;	tmp = 0;      } else if(c >= '0' || c <= '9') {	tmp = (tmp * 10) + (c - '0');      } else {	return 0;      }      ++addrstr;    } while(c != '.' && c != 0);  }  return 1;}