/***************************************************************************                          utils.c  -  description                             -------------------    begin                : Wed Jul 30 2003    copyright            : (C) 2003 by Luke Klein-Berndt    email                : kleinb@nist.gov ***************************************************************************/ #include "utils.h"u_int64_t getcurrtime(){    struct timeval tv;    u_int64_t result;    do_gettimeofday(&tv);    //This is a fix for an error that occurs on ARM Linux Kernels because they do 64bits differently    //Thanks to S. Peter Li for coming up with this fix!    result = (u_int64_t) tv.tv_usec;    do_div(result, 1000);    return ((u_int64_t) tv.tv_sec) * 1000 + result;}char *inet_ntoa(u_int32_t ina){    static char buf[4 * sizeof "123"];    unsigned char *ucp = (unsigned char *) &ina;    sprintf(buf, "%d.%d.%d.%d", ucp[0] & 0xff, ucp[1] & 0xff, ucp[2] & 0xff, ucp[3] & 0xff);    return buf;}int inet_aton(const char *cp, u_int32_t * addr){    unsigned int val;    int base, n;    char c;    u_int parts[4];    u_int *pp = parts;    for (;;)    {        //Collect number up to ``.''. Values are specified as for C:        // 0x=hex, 0=octal, other=decimal.        val = 0;        base = 10;        if (*cp == '0')        {            if (*++cp == 'x' || *cp == 'X')                base = 16, cp++;            else                base = 8;        }        while ((c = *cp) != '\0')        {            if (isascii(c) && isdigit(c))            {                val = (val * base) + (c - '0');                cp++;                continue;            }            if (base == 16 && isascii(c) && isxdigit(c))            {                val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));                cp++;                continue;            }            break;        }        if (*cp == '.')        {            // 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 || val > 0xff)                return (0);            *pp++ = val, cp++;        } else            break;    }    // Check for trailing characters.    if (*cp && (!isascii(*cp) || !isspace(*cp)))        return (0);    // Concoct the address according to the number of parts specified.    n = pp - parts + 1;    switch (n)    {    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 = htonl(val);    return (1);}int local_subnet_test(u_int32_t tmp_ip){//printk("Comparing route: %s ",inet_ntoa(tmp_route->ip & tmp_route->netmask));//printk(" to ip: %s\n", inet_ntoa(target_ip & tmp_route->netmask));   /* if ((tmp_dev->ip & tmp_dev->netmask)  == (tmp_dev->netmask & tmp_ip ))        return 1;*///		    		printk("Comparing route: %s ",inet_ntoa(tmp_dev->ip & tmp_dev->netmask));//		printk(" to ip: %s\n", inet_ntoa(tmp_ip & tmp_dev->netmask));  return 0;}int aodv_subnet_test(u_int32_t tmp_ip){    aodv_dev *tmp_dev;//printk("Comparing route: %s ",inet_ntoa(tmp_route->ip & tmp_route->netmask));//printk(" to ip: %s\n", inet_ntoa(target_ip & tmp_route->netmask));    tmp_dev = first_aodv_dev();     while (tmp_dev != NULL)    {    if ((tmp_dev->ip & tmp_dev->netmask)  == (tmp_dev->netmask & tmp_ip ))        return 1;         tmp_dev = tmp_dev->next;		}//		    		printk("Comparing route: %s ",inet_ntoa(tmp_dev->ip & tmp_dev->netmask));//		printk(" to ip: %s\n", inet_ntoa(tmp_ip & tmp_dev->netmask));  return 0;}u_int32_t calculate_netmask(int t){    int i;    uint32_t final = 0;    for (i = 0; i < 32 - t; i++)    {        final = final + 1;        final = final << 1;    }    final = final + 1;    final = ~final;    return final;}int calculate_prefix(u_int32_t t){    int i = 1;    while (t != 0)    {        t = t << 1;        i++;    }    return i;}int seq_less_or_equal(u_int32_t seq_one,u_int32_t seq_two){    int *comp_seq_one = &seq_one;    int *comp_seq_two = &seq_two;    if (  ( *comp_seq_one - *comp_seq_two ) > 0 )    {        return 0;    }    else        return 1;}int seq_greater(u_int32_t seq_one,u_int32_t seq_two){    int *comp_seq_one = &seq_one;    int *comp_seq_two = &seq_two;    if (  ( *comp_seq_one - *comp_seq_two ) < 0 )        return 0;    else        return 1;}