Initial commit

1 files changed, 62 insertions, 0 deletions

diff --git a/src/clients/s6-randomip.c b/src/clients/s6-randomip.c
new file mode 100644
index 0000000..b220374
--- /dev/null
+++ b/src/clients/s6-randomip.c
@@ -0,0 +1,62 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.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 ;
+  unsigned int what = 0 ;
+  int finite = 0 ;
+  PROG = "s6-randomip" ;
+  for (;;)
+  {
+    register int opt = subgetopt(argc, argv, "46n:") ;
+    if (opt == -1) break ;
+    switch (opt)
+    {
+      case '4' : what |= 1 ; break ;
+      case '6' : what |= 2 ; break ;
+      case 'n' :
+        if (!uint0_scan(subgetopt_here.arg, &n)) dieusage() ;
+        finite = 1 ;
+        break ;
+      default : dieusage() ;
+    }
+  }
+  argc -= subgetopt_here.ind ; argv += subgetopt_here.ind ;
+  if (!what) what = 1 ;
+  what = 1 << (1 << what) ; 
+  if (!badrandom_init()) strerr_diefu1sys(111, "init RNG") ;
+  for (i = 0 ; !finite || (i < n) ; i++)
+  {
+    unsigned int len = what ;
+    if (len > 16)
+    {
+      char c ;
+      if (badrandom_string(&c, 1) < 1)
+        strerr_diefu1sys(111, "badrandom_string") ;
+      len = (c & 1) ? 16 : 4 ;
+    }
+    if (badrandom_string(ip, len) < 4)
+      strerr_diefu1sys(111, "badrandom_string") ;
+    len = (len == 16) ? ip6_fmt(fmt, ip) : ip4_fmt(fmt, ip) ;
+    fmt[len++] = '\n' ;
+    if (buffer_put(buffer_1, fmt, len) < (int)len)
+      strerr_diefu1sys(111, "write to stdout") ;
+  }
+  if (!buffer_flush(buffer_1))
+    strerr_diefu1sys(111, "write to stdout") ;
+  return 0 ;
+}