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/* ISC license. */
#include <stddef.h>
#include <errno.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr.h>
#include <skalibs/buffer.h>
#include <skalibs/fmtscan.h>
#include <skalibs/random.h>
#define USAGE "s6-randomip [ -4 ] [ -6 ] [ -n number ]"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
char fmt[IP6_FMT] ;
char ip[16] ;
unsigned int n ;
unsigned int i = 0 ;
size_t what = 0 ;
int finite = 0 ;
PROG = "s6-randomip" ;
{
subgetopt l = SUBGETOPT_ZERO ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "46n:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case '4' : what |= 1 ; break ;
case '6' : what |= 2 ; break ;
case 'n' : if (!uint0_scan(l.arg, &n)) dieusage() ; finite = 1 ;
break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
}
if (!what) what = 1 ;
what = 1 << (1 << what) ;
for (i = 0 ; !finite || (i < n) ; i++)
{
size_t len = what ;
if (len > 16)
{
char c ;
random_buf(&c, 1) ;
len = (c & 1) ? 16 : 4 ;
}
random_buf(ip, len) ;
len = (len == 16) ? ip6_fmt(fmt, ip) : ip4_fmt(fmt, ip) ;
fmt[len++] = '\n' ;
if (buffer_put(buffer_1, fmt, len) < len)
strerr_diefu1sys(111, "write to stdout") ;
}
if (!buffer_flush(buffer_1))
strerr_diefu1sys(111, "write to stdout") ;
return 0 ;
}
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