detect/iponly: fix parsing of '0' valued netmask

6 years ago · 4d50eb1647
parent d4613e5c70
commit 4d50eb1647
1 changed files with 7 additions and 5 deletions
--- a/src/detect-engine-iponly.c
+++ b/src/detect-engine-iponly.c
@ -178,12 +178,14 @@ static int IPOnlyCIDRItemParseSingle(IPOnlyCIDRItem *dd, const char *str)

                netmask = in.s_addr;

-                /* Extract cidr netmask */
-                while ((0x01 & netmask) == 0) {
-                    dd->netmask++;
-                    netmask = netmask >> 1;
+                if (netmask != 0) {
+                    /* Extract cidr netmask */
+                    while ((0x01 & netmask) == 0) {
+                        dd->netmask++;
+                        netmask = netmask >> 1;
+                    }
+                    dd->netmask = 32 - dd->netmask;
                }
-                dd->netmask = 32 - dd->netmask;
            }

            r = inet_pton(AF_INET, ip, &in);