Remove count_netmask_bits(), convert users to use netmask_to_netbits2()

The previous Linux/iproute2 code converted binary netmasks to string
representation (print_in_addr_t()), just to immediately scanf() it back
to binary to count bits.  netmask_to_netbits2() directly works on the
in_addr_t.

Signed-off-by: Gert Doering <gert@greenie.muc.de>
Acked-by: Steffan Karger <steffan.karger@fox-it.com>
Message-Id: <1419713983-16272-1-git-send-email-gert@greenie.muc.de>
URL: http://article.gmane.org/gmane.network.openvpn.devel/9360

5 files changed, 5 insertions, 34 deletions

diff --git a/src/openvpn/misc.c b/src/openvpn/misc.c
index 61bc523..5627cb9 100644
--- a/src/openvpn/misc.c
+++ b/src/openvpn/misc.c
@@ -827,32 +827,6 @@ setenv_str_i (struct env_set *es, const char *name, const char *value, const int
   gc_free (&gc);
 }
 
-/*
- * taken from busybox networking/ifupdown.c
- */
-unsigned int
-count_bits(unsigned int a)
-{
-  unsigned int result;
-  result = (a & 0x55) + ((a >> 1) & 0x55);
-  result = (result & 0x33) + ((result >> 2) & 0x33);
-  return((result & 0x0F) + ((result >> 4) & 0x0F));
-}
-
-int
-count_netmask_bits(const char *dotted_quad)
-{
-  unsigned int result, a, b, c, d;
-  /* Found a netmask...  Check if it is dotted quad */
-  if (sscanf(dotted_quad, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
-    return -1;
-  result = count_bits(a);
-  result += count_bits(b);
-  result += count_bits(c);
-  result += count_bits(d);
-  return ((int)result);
-}
-
 /* return true if filename can be opened for read */
 bool
 test_file (const char *filename)
diff --git a/src/openvpn/misc.h b/src/openvpn/misc.h
index 41748bd..5fe085e 100644
--- a/src/openvpn/misc.h
+++ b/src/openvpn/misc.h
@@ -166,10 +166,6 @@ const char **make_env_array (const struct env_set *es,
 const char **make_arg_array (const char *first, const char *parms, struct gc_arena *gc);
 const char **make_extended_arg_array (char **p, struct gc_arena *gc);
 
-/* convert netmasks for iproute2 */
-int count_netmask_bits(const char *);
-unsigned int count_bits(unsigned int );
-
 /* an analogue to the random() function, but use OpenSSL functions if available */
 #ifdef ENABLE_CRYPTO
 long int get_random(void);
diff --git a/src/openvpn/route.c b/src/openvpn/route.c
index 7ec482b..a349ac9 100644
--- a/src/openvpn/route.c
+++ b/src/openvpn/route.c
@@ -1288,7 +1288,7 @@ add_route (struct route_ipv4 *r,
   argv_printf (&argv, "%s route add %s/%d",
   	      iproute_path,
 	      network,
-             count_netmask_bits(netmask));
+              netmask_to_netbits2(r->netmask));
 
   if (r->flags & RT_METRIC_DEFINED)
     argv_printf_cat (&argv, "metric %d", r->metric);
@@ -1765,7 +1765,7 @@ delete_route (struct route_ipv4 *r,
   argv_printf (&argv, "%s route del %s/%d",
   	      iproute_path,
 	      network,
-	      count_netmask_bits(netmask));
+              netmask_to_netbits2(r->netmask));
 #else
   argv_printf (&argv, "%s del -net %s netmask %s",
 	       ROUTE_PATH,
diff --git a/src/openvpn/route.h b/src/openvpn/route.h
index f3c0150..3cec08d 100644
--- a/src/openvpn/route.h
+++ b/src/openvpn/route.h
@@ -305,6 +305,7 @@ static inline bool test_routes (const struct route_list *rl, const struct tuntap
 #endif
 
 bool netmask_to_netbits (const in_addr_t network, const in_addr_t netmask, int *netbits);
+int netmask_to_netbits2 (in_addr_t netmask);
 
 static inline in_addr_t
 netbits_to_netmask (const int netbits)
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index e92edc2..11a6d71 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -722,7 +722,7 @@ do_ifconfig (struct tuntap *tt,
 				  iproute_path,
 				  actual,
 				  ifconfig_local,
-				  count_netmask_bits(ifconfig_remote_netmask),
+				  netmask_to_netbits2(tt->remote_netmask),
 				  ifconfig_broadcast
 				  );
 		  argv_msg (M_INFO, &argv);
@@ -1819,7 +1819,7 @@ close_tun (struct tuntap *tt)
 			iproute_path,
 			tt->actual_name,
 			print_in_addr_t (tt->local, 0, &gc),
-			count_netmask_bits(print_in_addr_t (tt->remote_netmask, 0, &gc))
+		        netmask_to_netbits2(tt->remote_netmask)
 			);
 	      }
 #else