docu
[oweals/gnunet.git] / src / transport / gnunet-service-transport_validation.c
index 08e31c7d9a414a4dc92c9713749e0f2c41550e41..c38a5022c07df48af8abd591c0dbcf3108915096 100644 (file)
@@ -149,13 +149,13 @@ struct TransportPongMessage
   /**
    * Signature.
    */
-  struct GNUNET_CRYPTO_RsaSignature signature;
+  struct GNUNET_CRYPTO_EccSignature signature;
 
   /**
    * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
    * plausible address for the signing peer.
    */
-  struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
+  struct GNUNET_CRYPTO_EccSignaturePurpose purpose;
 
   /**
    * When does this signature expire?
@@ -190,7 +190,7 @@ struct ValidationEntry
   /**
    * Public key of the peer.
    */
-  struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
+  struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded public_key;
 
   /**
    * The identity of the peer. FIXME: duplicated (also in 'address')
@@ -307,6 +307,16 @@ static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
 static struct GNUNET_PEERINFO_NotifyContext *pnc;
 
 
+/**
+ * Minimum delay between to validations
+ */
+static struct GNUNET_TIME_Relative validation_delay;
+
+/**
+ * When is next validation allowed
+ */
+static struct GNUNET_TIME_Absolute validation_next;
+
 /**
  * Context for the validation entry match function.
  */
@@ -433,6 +443,7 @@ transmit_ping_if_allowed (void *cls, const struct GNUNET_PeerIdentity *pid,
   struct ValidationEntry *ve = cls;
   struct TransportPingMessage ping;
   struct GNUNET_TRANSPORT_PluginFunctions *papi;
+  struct GNUNET_TIME_Absolute next;
   const struct GNUNET_MessageHeader *hello;
   ssize_t ret;
   size_t tsize;
@@ -440,9 +451,21 @@ transmit_ping_if_allowed (void *cls, const struct GNUNET_PeerIdentity *pid,
   uint16_t hsize;
 
   ve->bc = NULL;
+
+  if (GNUNET_NO == result)
+  {
+         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Blacklist denies to send PING to `%s' %s %s\n",
+                     GNUNET_i2s (pid), GST_plugins_a2s (ve->address), ve->address->transport_name);
+               return;
+  }
+
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transmitting plain PING to `%s' %s %s\n",
               GNUNET_i2s (pid), GST_plugins_a2s (ve->address), ve->address->transport_name);
 
+  next = GNUNET_TIME_absolute_add(GNUNET_TIME_absolute_get(), validation_delay);
+  if (next.abs_value > validation_next.abs_value)
+       validation_next = next; /* We're going to send a PING so delay next validation */
+
   slen = strlen (ve->address->transport_name) + 1;
   hello = GST_hello_get ();
   hsize = ntohs (hello->size);
@@ -529,6 +552,7 @@ revalidate_address (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
   struct ValidationEntry *ve = cls;
   struct GNUNET_TIME_Relative canonical_delay;
   struct GNUNET_TIME_Relative delay;
+  struct GNUNET_TIME_Relative blocked_for;
   struct GST_BlacklistCheck *bc;
   uint32_t rdelay;
 
@@ -553,6 +577,14 @@ revalidate_address (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
         GNUNET_SCHEDULER_add_delayed (delay, &revalidate_address, ve);
     return;
   }
+  blocked_for = GNUNET_TIME_absolute_get_remaining(validation_next);
+  if ((blocked_for.rel_value) > 0)
+  {
+               /* Validations are blocked, have to wait for blocked_for ms */
+      ve->revalidation_task =
+          GNUNET_SCHEDULER_add_delayed (blocked_for, &revalidate_address, ve);
+      return;
+  }
   ve->revalidation_block = GNUNET_TIME_relative_to_absolute (canonical_delay);
 
   /* schedule next PINGing with some extra random delay to avoid synchronous re-validations */
@@ -604,7 +636,7 @@ revalidate_address (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
  *         if we don't have an existing entry and no public key was given
  */
 static struct ValidationEntry *
-find_validation_entry (const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
+find_validation_entry (const struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded
                        *public_key, const struct GNUNET_HELLO_Address *address)
 {
   struct ValidationEntryMatchContext vemc;
@@ -656,7 +688,7 @@ add_valid_address (void *cls, const struct GNUNET_HELLO_Address *address,
   const struct GNUNET_HELLO_Message *hello = cls;
   struct ValidationEntry *ve;
   struct GNUNET_PeerIdentity pid;
-  struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
+  struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded public_key;
 
   if (GNUNET_TIME_absolute_get_remaining (expiration).rel_value == 0)
     return GNUNET_OK;           /* expired */
@@ -707,10 +739,15 @@ process_peerinfo_hello (void *cls, const struct GNUNET_PeerIdentity *peer,
 
 /**
  * Start the validation subsystem.
+ *
+ * @param max_fds maximum number of fds to use
  */
 void
-GST_validation_start ()
+GST_validation_start (unsigned int max_fds)
 {
+       validation_next = GNUNET_TIME_absolute_get();
+       validation_delay.rel_value = (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT.rel_value) /  max_fds;
+       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Delay between validations: %u ms\n ", validation_delay.rel_value);
   validation_map = GNUNET_CONTAINER_multihashmap_create (VALIDATION_MAP_SIZE,
                                                         GNUNET_NO);
   pnc = GNUNET_PEERINFO_notify (GST_cfg, &process_peerinfo_hello, NULL);
@@ -752,7 +789,7 @@ GST_validation_stop ()
  */
 static void
 multicast_pong (void *cls,
-                const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded
+                const struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded
                 *public_key, struct GNUNET_TIME_Absolute valid_until,
                 struct GNUNET_TIME_Absolute validation_block,
                 const struct GNUNET_HELLO_Address *address)
@@ -798,7 +835,7 @@ GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
   const struct TransportPingMessage *ping;
   struct TransportPongMessage *pong;
   struct GNUNET_TRANSPORT_PluginFunctions *papi;
-  struct GNUNET_CRYPTO_RsaSignature *sig_cache;
+  struct GNUNET_CRYPTO_EccSignature *sig_cache;
   struct GNUNET_TIME_Absolute *sig_cache_exp;
   const char *addr;
   const char *addrend;
@@ -894,7 +931,7 @@ GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
   {
     addrend = NULL;             /* make gcc happy */
     slen = 0;
-    static struct GNUNET_CRYPTO_RsaSignature no_address_signature;
+    static struct GNUNET_CRYPTO_EccSignature no_address_signature;
     static struct GNUNET_TIME_Absolute no_address_signature_expiration;
 
     sig_cache = &no_address_signature;
@@ -914,7 +951,7 @@ GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
       htons (sizeof (struct TransportPongMessage) + alen + slen);
   pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
   pong->purpose.size =
-      htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
+      htonl (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
              sizeof (uint32_t) + sizeof (struct GNUNET_TIME_AbsoluteNBO) +
              alen + slen);
   pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
@@ -944,7 +981,7 @@ GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating buggy PONG signature to indicate ownership.\n");
     pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
     GNUNET_assert (GNUNET_OK ==
-                   GNUNET_CRYPTO_rsa_sign (GST_my_private_key, &pong->purpose,
+                   GNUNET_CRYPTO_ecc_sign (GST_my_private_key, &pong->purpose,
                                            &pong->signature));
   }
   else
@@ -964,7 +1001,7 @@ GST_validation_handle_ping (const struct GNUNET_PeerIdentity *sender,
       *sig_cache_exp = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
       pong->expiration = GNUNET_TIME_absolute_hton (*sig_cache_exp);
       GNUNET_assert (GNUNET_OK ==
-                     GNUNET_CRYPTO_rsa_sign (GST_my_private_key, &pong->purpose,
+                     GNUNET_CRYPTO_ecc_sign (GST_my_private_key, &pong->purpose,
                                              sig_cache));
     }
     else
@@ -1043,7 +1080,7 @@ struct ValidateAddressContext
   /**
    * Public key of the peer whose address is being validated.
    */
-  struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded public_key;
+  struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded public_key;
 };
 
 
@@ -1160,16 +1197,14 @@ GST_validation_handle_pong (const struct GNUNET_PeerIdentity *sender,
   }
 
   if (GNUNET_OK !=
-      GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
+      GNUNET_CRYPTO_ecc_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
                                 &pong->purpose, &pong->signature,
                                 &ve->public_key))
   {
-    GNUNET_break_op (0);
-    /*
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Invalid signature on address %s:%s from peer `%s'\n",
                tname, GST_plugins_a2s (ve->address),
-               GNUNET_i2s (sender));*/
+               GNUNET_i2s (sender));
     return;
   }