Use netmasks instead of prefix lengths internally

[project/firewall3.git] / utils.c

diff --git a/utils.c b/utils.c
index 4f30955..fa4a73f 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -514,7 +514,7 @@ write_zone_uci(struct uci_context *ctx, struct fw3_zone *z,
                if (!sub)
                        continue;
 
-               ptr.value = fw3_address_to_string(sub, true);
+               ptr.value = fw3_address_to_string(sub, true, false);
                uci_add_list(ctx, &ptr);
        }
 
@@ -569,7 +569,7 @@ write_ipset_uci(struct uci_context *ctx, struct fw3_ipset *s,
        {
                ptr.o      = NULL;
                ptr.option = "iprange";
-               ptr.value  = fw3_address_to_string(&s->iprange, false);
+               ptr.value  = fw3_address_to_string(&s->iprange, false, false);
                uci_set(ctx, &ptr);
        }
 
@@ -710,3 +710,60 @@ fw3_hotplug(bool add, void *zone, void *device)
        /* unreached */
        return false;
 }
+
+int
+fw3_netmask2bitlen(int family, void *mask)
+{
+       int bits;
+       struct in_addr *v4;
+       struct in6_addr *v6;
+
+       if (family == FW3_FAMILY_V6)
+               for (bits = 0, v6 = mask;
+                    bits < 128 && (v6->s6_addr[bits / 8] << (bits % 8)) & 128;
+                    bits++);
+       else
+               for (bits = 0, v4 = mask;
+                    bits < 32 && (ntohl(v4->s_addr) << bits) & 0x80000000;
+                    bits++);
+
+       return bits;
+}
+
+bool
+fw3_bitlen2netmask(int family, int bits, void *mask)
+{
+       int i;
+       struct in_addr *v4;
+       struct in6_addr *v6;
+
+       if (family == FW3_FAMILY_V6)
+       {
+               if (bits < -128 || bits > 128)
+                       return false;
+
+               v6 = mask;
+               i = abs(bits);
+
+               memset(v6->s6_addr, 0xff, i / 8);
+               memset(v6->s6_addr + (i / 8) + 1, 0, (128 - i) / 8);
+               v6->s6_addr[i / 8] = 0xff << (8 - (i & 7));
+
+               if (bits < 0)
+                       for (i = 0; i < 16; i++)
+                               v6->s6_addr[i] = ~v6->s6_addr[i];
+       }
+       else
+       {
+               if (bits < -32 || bits > 32)
+                       return false;
+
+               v4 = mask;
+               v4->s_addr = htonl(~((1 << (32 - abs(bits))) - 1));
+
+               if (bits < 0)
+                       v4->s_addr = ~v4->s_addr;
+       }
+
+       return true;
+}