address and port: reduce memory allocs

src/detect-engine-address.c

@@ -600,27 +600,24 @@ int DetectAddressParseString(DetectAddress *dd, char *str)
     char *ip2 = NULL;
     char *mask = NULL;
     int r = 0;
+    char ipstr[256];
 
     while (*str != '\0' && *str == ' ')
         str++;
 
-    char *ipdup = SCStrdup(str);
-    if (unlikely(ipdup == NULL))
-        return -1;
-    SCLogDebug("str %s", str);
-
     /* first handle 'any' */
     if (strcasecmp(str, "any") == 0) {
         dd->flags |= ADDRESS_FLAG_ANY;
-        SCFree(ipdup);
-
         SCLogDebug("address is \'any\'");
-
         return 0;
     }
 
-    /* we dup so we can put a nul-termination in it later */
-    ip = ipdup;
+    strlcpy(ipstr, str, sizeof(ipstr));
+    SCLogDebug("str %s", str);
+
+    /* we work with a copy so that we can put a
+     * nul-termination in it later */
+    ip = ipstr;
 
     /* handle the negation case */
     if (ip[0] == '!') {
@@ -757,14 +754,11 @@ int DetectAddressParseString(DetectAddress *dd, char *str)
 
     }
 
-    SCFree(ipdup);
-
     BUG_ON(dd->ip.family == 0);
 
     return 0;
 
 error:
-    SCFree(ipdup);
     return -1;
 }
 

src/detect-engine-port.c

@@ -1402,11 +1402,9 @@ error:
 DetectPort *PortParse(char *str) {
     char *port2 = NULL;
     DetectPort *dp = NULL;
-    char *portdup = SCStrdup(str);
 
-    if (unlikely(portdup == NULL)) {
-        return NULL;
-    }
+    char portstr[16];
+    strlcpy(portstr, str, sizeof(portstr));
 
     dp = DetectPortInit();
     if (dp == NULL)
@@ -1415,7 +1413,7 @@ DetectPort *PortParse(char *str) {
     /* XXX better input validation */
 
     /* we dup so we can put a nul-termination in it later */
-    char *port = portdup;
+    char *port = portstr;
 
     /* handle the negation case */
     if (port[0] == '!') {
@@ -1457,14 +1455,11 @@ DetectPort *PortParse(char *str) {
         }
     }
 
-    SCFree(portdup);
     return dp;
 
 error:
     if (dp != NULL)
         DetectPortCleanupList(dp);
-
-    if (portdup) SCFree(portdup);
     return NULL;
 }