isakmp: Free the UAT tables' records using a free callback

Change-Id: Ife44b225337e5c583c722ac62f711ed3ec9cf808
Reviewed-on: https://code.wireshark.org/review/30535
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Petri-Dish: Peter Wu <peter@lekensteyn.nl>
Tested-by: Petri Dish Buildbot
Reviewed-by: Anders Broman <a.broman58@gmail.com>

epan/dissectors/packet-isakmp.c

@@ -5830,27 +5830,6 @@ isakmp_cleanup_protocol(void) {
   g_hash_table_destroy(defrag_next_payload_hash);
 }
 
-static void
-isakmp_shutdown(void)
-{
-  guint i;
-  for (i = 0; i < num_ikev2_uat_data; i++) {
-    ikev2_uat_data_t* data = &ikev2_uat_data[i];
-    g_free(data->key.spii);
-    g_free(data->key.spir);
-    g_free(data->sk_ei);
-    g_free(data->sk_er);
-    g_free(data->sk_ai);
-    g_free(data->sk_ar);
-  }
-
-  for (i = 0; i < num_ikev1_uat_data; i++) {
-    ikev1_uat_data_key_t* data = &ikev1_uat_data[i];
-    g_free(data->icookie);
-    g_free(data->key);
-  }
-}
-
 UAT_BUFFER_CB_DEF(ikev1_users, icookie, ikev1_uat_data_key_t, icookie, icookie_len)
 UAT_BUFFER_CB_DEF(ikev1_users, key, ikev1_uat_data_key_t, key, key_len)
 
@@ -5875,6 +5854,28 @@ static gboolean ikev1_uat_data_update_cb(void* p, char** err) {
   return TRUE;
 }
 
+static void*
+ikev1_uat_data_copy_cb(void *dest, const void *source, size_t len _U_)
+{
+  const ikev1_uat_data_key_t* o = (const ikev1_uat_data_key_t*)source;
+  ikev1_uat_data_key_t* d = (ikev1_uat_data_key_t*)dest;
+
+  d->icookie = (guchar *)g_memdup(o->icookie, o->icookie_len);
+  d->icookie_len = o->icookie_len;
+  d->key = (guchar *)g_memdup(o->key, o->key_len);
+  d->key_len = o->key_len;
+
+  return dest;
+}
+
+static void
+ikev1_uat_data_free_cb(void *r)
+{
+  ikev1_uat_data_key_t *rec = (ikev1_uat_data_key_t *)r;
+  g_free(rec->icookie);
+  g_free(rec->key);
+}
+
 UAT_BUFFER_CB_DEF(ikev2_users, spii, ikev2_uat_data_t, key.spii, key.spii_len)
 UAT_BUFFER_CB_DEF(ikev2_users, spir, ikev2_uat_data_t, key.spir, key.spir_len)
 UAT_BUFFER_CB_DEF(ikev2_users, sk_ei, ikev2_uat_data_t, sk_ei, sk_ei_len)
@@ -5884,6 +5885,39 @@ UAT_BUFFER_CB_DEF(ikev2_users, sk_ai, ikev2_uat_data_t, sk_ai, sk_ai_len)
 UAT_BUFFER_CB_DEF(ikev2_users, sk_ar, ikev2_uat_data_t, sk_ar, sk_ar_len)
 UAT_VS_DEF(ikev2_users, auth_alg, ikev2_uat_data_t, guint, IKEV2_AUTH_HMAC_SHA1_96, IKEV2_AUTH_HMAC_SHA1_96_STR)
 
+static void*
+ikev2_uat_data_copy_cb(void *dest, const void *source, size_t len _U_)
+{
+  const ikev2_uat_data_t* o = (const ikev2_uat_data_t*)source;
+  ikev2_uat_data_t* d = (ikev2_uat_data_t*)dest;
+
+  d->key.spii = (guchar *)g_memdup(o->key.spii, o->key.spii_len);
+  d->key.spii_len = o->key.spii_len;
+
+  d->key.spir = (guchar *)g_memdup(o->key.spir, o->key.spir_len);
+  d->key.spir_len = o->key.spir_len;
+
+  d->encr_alg = o->encr_alg;
+  d->auth_alg = o->auth_alg;
+
+  d->sk_ei = (guchar *)g_memdup(o->sk_ei, o->sk_ei_len);
+  d->sk_ei_len = o->sk_ei_len;
+
+  d->sk_er = (guchar *)g_memdup(o->sk_er, o->sk_er_len);
+  d->sk_er_len = o->sk_er_len;
+
+  d->sk_ai = (guchar *)g_memdup(o->sk_ai, o->sk_ai_len);
+  d->sk_ai_len = o->sk_ai_len;
+
+  d->sk_ar = (guchar *)g_memdup(o->sk_ar, o->sk_ar_len);
+  d->sk_ar_len = o->sk_ar_len;
+
+  d->encr_spec = (ikev2_encr_alg_spec_t *)g_memdup(o->encr_spec, sizeof(ikev2_encr_alg_spec_t));
+  d->auth_spec = (ikev2_auth_alg_spec_t *)g_memdup(o->auth_spec, sizeof(ikev2_auth_alg_spec_t));
+
+  return dest;
+}
+
 static gboolean ikev2_uat_data_update_cb(void* p, char** err) {
   ikev2_uat_data_t *ud = (ikev2_uat_data_t *)p;
 
@@ -5938,6 +5972,18 @@ static gboolean ikev2_uat_data_update_cb(void* p, char** err) {
   return TRUE;
 }
 
+static void
+ikev2_uat_data_free_cb(void *r)
+{
+  ikev2_uat_data_t *rec = (ikev2_uat_data_t *)r;
+  g_free(rec->key.spii);
+  g_free(rec->key.spir);
+  g_free(rec->sk_ei);
+  g_free(rec->sk_er);
+  g_free(rec->sk_ai);
+  g_free(rec->sk_ar);
+}
+
 void
 proto_register_isakmp(void)
 {
@@ -7260,7 +7306,6 @@ proto_register_isakmp(void)
   expert_register_field_array(expert_isakmp, ei, array_length(ei));
   register_init_routine(&isakmp_init_protocol);
   register_cleanup_routine(&isakmp_cleanup_protocol);
-  register_shutdown_routine(&isakmp_shutdown);
   reassembly_table_register(&isakmp_cisco_reassembly_table,
                         &addresses_reassembly_table_functions);
   reassembly_table_register(&isakmp_ike2_reassembly_table,
@@ -7277,9 +7322,9 @@ proto_register_isakmp(void)
       &num_ikev1_uat_data,
       UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
       "ChIKEv1DecryptionSection",
-      NULL,
+      ikev1_uat_data_copy_cb,
       ikev1_uat_data_update_cb,
-      NULL,
+      ikev1_uat_data_free_cb,
       NULL,
       NULL,
       ikev1_uat_flds);
@@ -7298,9 +7343,9 @@ proto_register_isakmp(void)
       &num_ikev2_uat_data,
       UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
       "ChIKEv2DecryptionSection",
-      NULL,
+      ikev2_uat_data_copy_cb,
       ikev2_uat_data_update_cb,
-      NULL,
+      ikev2_uat_data_free_cb,
       NULL,
       NULL,
       ikev2_uat_flds);