From e0fc82203d677a6f1e808e9a1a46176c109d89be Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 15 Dec 2014 23:08:59 +0000
Subject:  Initial commit

---
 src/libs6net/s6net_accessrules_keycheck_ip4.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 src/libs6net/s6net_accessrules_keycheck_ip4.c

(limited to 'src/libs6net/s6net_accessrules_keycheck_ip4.c')

diff --git a/src/libs6net/s6net_accessrules_keycheck_ip4.c b/src/libs6net/s6net_accessrules_keycheck_ip4.c
new file mode 100644
index 0000000..1f96bd8
--- /dev/null
+++ b/src/libs6net/s6net_accessrules_keycheck_ip4.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/uint.h>
+#include <skalibs/fmtscan.h>
+#include <s6-networking/accessrules.h>
+
+s6net_accessrules_result_t s6net_accessrules_keycheck_ip4 (void const *key, void *data, s6net_accessrules_params_t *params, s6net_accessrules_backend_func_t_ref check1)
+{
+  char fmt[IP4_FMT + UINT_FMT + 6] = "ip4/" ;
+  uint32 ip ;
+  unsigned int i = 0 ;
+  uint32_unpack_big((char const *)key, &ip) ;
+  for (; i <= 32 ; i++)
+  {
+    register s6net_accessrules_result_t r ;
+    register unsigned int len = 4 + ip4_fmtu32(fmt+4, (i == 32) ? 0 : ip & ~((1U << i) - 1)) ;
+    fmt[len++] = '_' ;
+    len += uint_fmt(fmt + len, 32 - i) ;
+    r = (*check1)(fmt, len, data, params) ;
+    if (r != S6NET_ACCESSRULES_NOTFOUND) return r ;
+  }
+  return S6NET_ACCESSRULES_NOTFOUND ;
+}
-- 
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