added support /prefix for IPV4 form IPV6 code. Close bug 461

diff --git a/networking/route.c b/networking/route.c
index 49d219ae096d4eb2155fe49fb897ad853dd01920..59c7564082be127fdd27aa2c2e12d76e75b22bcf 100644 (file)
--- a/networking/route.c
+++ b/networking/route.c
@@ -184,14 +184,33 @@ static void INET_setroute(int action, char **args)
 
        {
                const char *target = *args++;
+               char *prefix;
 
+               /* recognize x.x.x.x/mask format. */
+               prefix = strchr(target, '/');
+               if(prefix) {
+                       int prefix_len;
+
+                       prefix_len = bb_xgetularg10_bnd(prefix+1, 0, 32);
+                       mask_in_addr(rt) = htonl( ~ (0xffffffffUL >> prefix_len));
+                       *prefix = '\0';
+#if HAVE_NEW_ADDRT
+                       rt.rt_genmask.sa_family = AF_INET;
+#endif
+               } else {
+                       /* Default netmask. */
+                       netmask = bb_INET_default;
+               }
                /* Prefer hostname lookup is -host flag (xflag==1) was given. */
                isnet = INET_resolve(target, (struct sockaddr_in *) &rt.rt_dst,
                                                         (xflag & HOST_FLAG));
                if (isnet < 0) {
                        bb_error_msg_and_die("resolving %s", target);
                }
-
+               if(prefix) {
+                       /* do not destroy prefix for process args */
+                       *prefix = '/';
+               }
        }
 
        if (xflag) {            /* Reinit isnet if -net or -host was specified. */
@@ -201,8 +220,6 @@ static void INET_setroute(int action, char **args)
        /* Fill in the other fields. */
        rt.rt_flags = ((isnet) ? RTF_UP : (RTF_UP | RTF_HOST));
 
-       netmask = bb_INET_default;
-
        while (*args) {
                int k = kw_lookup(tbl_ipvx, &args);
                const char *args_m1 = args[-1];