Add ability to drop overly large packets

[onak.git] / hash.c

diff --git a/hash.c b/hash.c
index f07017a669d7e65342ce81637d801d0548bb9f59..9357831ccc9b352fd3531f8afc4ebaf54df58700 100644 (file)
--- a/hash.c
+++ b/hash.c
@@ -1,18 +1,29 @@
 /*
  * hash.c - hashing routines mainly used for caching key details.
  *
- * Jonathan McDowell <noodles@earth.li>
+ * Copyright 2000-2002 Jonathan McDowell <noodles@earth.li>
  *
- * Copyright 2000-2002 Project Purple
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "hash.h"
-#include "keydb.h"
-#include "keyid.h"
+#include "keystructs.h"
 #include "ll.h"
+#include "mem.h"
 #include "stats.h"
 
 /**
@@ -25,6 +36,29 @@ static struct ll *hashtable[HASHSIZE];
  */
 static unsigned long elements;
 
+/**
+ *     free_statskey - free an stats key structure.
+ *     @key: The key to free.
+ *
+ *     Takes a stats key and frees the memory used by it and the linked list
+ *     of sigs under it. Doesn't recurse into the list as it's assumed all the
+ *     objects referenced also exist in the hash.
+ */
+static void free_statskey(struct stats_key *key)
+{
+       if (key != NULL) {
+               if (key->sigs != NULL) {
+                       llfree(key->sigs, NULL);
+                       key->sigs = NULL;
+               }
+               if (key->signs != NULL) {
+                       llfree(key->signs, NULL);
+                       key->signs = NULL;
+               }
+               free(key);
+       }
+}
+
 /**
  *     inithash - Initialize the hash ready for use.
  */
@@ -55,7 +89,7 @@ void destroyhash(void)
                 * TODO: The problem is the object has pointers that
                 * need freed too.
                 */
-               llfree(curll, free);
+               llfree(curll, (void (*)(void *)) free_statskey);
                hashtable[i] = NULL;
        }
        elements = 0;
@@ -99,7 +133,7 @@ struct stats_key *createandaddtohash(uint64_t keyid)
        return tmpkey;
 }
 
-int stats_key_cmp(struct stats_key *key, uint64_t *keyid)
+static int stats_key_cmp(struct stats_key *key, uint64_t *keyid)
 {
        return !(key != NULL && key->keyid == *keyid);
 }
@@ -121,42 +155,7 @@ unsigned long hashelements(void)
        return elements;
 }
 
-struct ll *gethashtableentry(int entry)
+struct ll *gethashtableentry(unsigned int entry)
 {
        return hashtable[entry];
 }
-
-/**
- *     hash_getkeysigs - Gets the signatures on a key.
- *     @keyid: The key we want the signatures for.
- *     
- *     This function gets the signatures on a key. It's the same as the
- *     getkeysigs function from the keydb module except we also cache the data
- *     so that if we need it again we already have it available.
- */
-struct ll *hash_getkeysigs(uint64_t keyid)
-{
-       struct stats_key *key = NULL;
-
-       key = findinhash(keyid);
-       if (key == NULL) {
-               key = malloc(sizeof(*key));
-               if (key != NULL) {
-                       key->keyid = keyid;
-                       key->colour = 0;
-                       key->parent = 0;
-                       key->sigs = NULL;
-                       key->gotsigs = false;
-                       addtohash(key);
-               } else {
-                       perror("hash_getkeysigs()");
-                       return NULL;
-               }
-       }
-       if (key->gotsigs == false) {
-               key->sigs = getkeysigs(key->keyid);
-               key->gotsigs = true;
-       }
-
-       return key->sigs;
-}