Don't se_ allocate strings when mapping addresses to column strings.

This should significantly reduce memory usage, without increasing the
CPU time required to process a capture file in TShark or Wireshark.

As a result, se_address_to_str() is no longer used; eliminate it.

Fixes bug #9949.

Change-Id: I65a112a426c82cc73a957b81384c765c3d14f2c3
Reviewed-on: https://code.wireshark.org/review/1213
Reviewed-by: Evan Huus <eapache@gmail.com>

epan/addr_resolv.c

@@ -1055,34 +1055,6 @@ solve_address_to_name(const address *addr)
     }
 }
 
-static const gchar *
-se_solve_address_to_name(const address *addr)
-{
-    switch (addr->type) {
-
-        case AT_ETHER:
-            return get_ether_name((const guint8 *)addr->data);
-
-        case AT_IPv4: {
-                          guint32 ip4_addr;
-                          memcpy(&ip4_addr, addr->data, sizeof ip4_addr);
-                          return get_hostname(ip4_addr);
-                      }
-
-        case AT_IPv6: {
-                          struct e_in6_addr ip6_addr;
-                          memcpy(&ip6_addr.bytes, addr->data, sizeof ip6_addr.bytes);
-                          return get_hostname6(&ip6_addr);
-                      }
-
-        case AT_STRINGZ:
-                      return se_strdup((const gchar *)addr->data);
-
-        default:
-                      return NULL;
-    }
-}
-
 /*
  * Ethernet / manufacturer resolution
  *
@@ -3036,25 +3008,42 @@ get_addr_name(const address *addr)
     return ep_address_to_str(addr);
 }
 
+/*
+ * XXX - we should rename get_addr_name() to ep_addr_name(), to indicate
+ * that the scope of the string it returns may be as short-lived as
+ * an ep_allocated string (although it may be longer-lived), and
+ * rename this to get_addr_name(), as its strings have the same scope
+ * as the get_XXX_name() routines it calls.
+ */
 const gchar *
 se_get_addr_name(const address *addr)
 {
-    const gchar *result;
+    guint32 ip4_addr;
+    struct e_in6_addr ip6_addr;
 
-    result = se_solve_address_to_name(addr);
+    /*
+     * Try to look up a name for this address.
+     * If it's not found, this might return a string corresponding to
+     * the address, or it might return NULL.
+     *
+     * Whatever string is returned has at least session scope.
+     */
+    switch (addr->type) {
 
-    if (result != NULL)
-        return result;
+    case AT_ETHER:
+        return get_ether_name((const guint8 *)addr->data);
 
-    /* if it gets here, either it is of type AT_NONE, */
-    /* or it should be solvable in se_address_to_str -unless addr->type is wrongly defined */
+    case AT_IPv4:
+        memcpy(&ip4_addr, addr->data, sizeof ip4_addr);
+        return get_hostname(ip4_addr);
 
-    if (addr->type == AT_NONE){
-        return "NONE";
+    case AT_IPv6:
+        memcpy(&ip6_addr.bytes, addr->data, sizeof ip6_addr.bytes);
+        return get_hostname6(&ip6_addr);
+
+    default:
+        return NULL;
     }
-
-    /* We need a "permanently" allocated string */
-    return se_address_to_str(addr);
 }
 
 void

epan/address_to_str.c

@@ -541,17 +541,6 @@ ep_address_to_str(const address *addr)
     return str;
 }
 
-/* The called routines use se_alloc'ed memory */
-gchar*
-se_address_to_str(const address *addr)
-{
-    gchar *str;
-
-    str=(gchar *)se_alloc(MAX_ADDR_STR_LEN);
-    address_to_str_buf(addr, str, MAX_ADDR_STR_LEN);
-    return str;
-}
-
 void
 address_to_str_buf(const address *addr, gchar *buf, int buf_len)
 {

epan/column-utils.c

@@ -1590,15 +1590,19 @@ static void
 col_set_addr(packet_info *pinfo, const int col, const address *addr, const gboolean is_src,
              const gboolean fill_col_exprs, const gboolean res)
 {
+  const char *name;
+
   if (addr->type == AT_NONE) {
     /* No address, nothing to do */
     return;
   }
 
-  if (res)
-    pinfo->cinfo->col_data[col] = se_get_addr_name(addr);
-  else
-    pinfo->cinfo->col_data[col] = se_address_to_str(addr);
+  if (res && (name = se_get_addr_name(addr)) != NULL)
+    pinfo->cinfo->col_data[col] = name;
+  else {
+    pinfo->cinfo->col_data[col] = pinfo->cinfo->col_buf[col];
+    address_to_str_buf(addr, pinfo->cinfo->col_buf[col], COL_MAX_LEN);
+  }
 
   if (!fill_col_exprs)
     return;

epan/to_str.h

@@ -51,7 +51,6 @@ struct     e_in6_addr;
 
 WS_DLL_PUBLIC gchar* address_to_str(wmem_allocator_t *scope, const address *addr);
 WS_DLL_PUBLIC gchar* ep_address_to_str(const address *);
-extern gchar*	se_address_to_str(const address *);
 WS_DLL_PUBLIC void     address_to_str_buf(const address *addr, gchar *buf, int buf_len);
 WS_DLL_PUBLIC const gchar*	ether_to_str(const guint8 *);
 WS_DLL_PUBLIC const gchar*	tvb_ether_to_str(tvbuff_t *tvb, const gint offset);

tools/checkAPIs.pl

@@ -163,7 +163,6 @@ my %APIs = (
                 'se_strdup_vprintf',
                 'se_strdup_printf',
                 'se_alloc_array',
-                'se_address_to_str',
                 'se_tree_create',
                 'se_tree_insert32',
                 'se_tree_lookup32',