/**
* Desired delay for flow control, in us (in NBO).
+ * A value of UINT32_MAX indicates that the other
+ * peer wants us to disconnect.
*/
uint32_t delay GNUNET_PACKED;
}
-/**
- * Handle an ACK message.
- *
- * @param plugin the UDP plugin
- * @param msg the (presumed) UDP ACK message
- * @param udp_addr sender address
- * @param udp_addr_len number of bytes in @a udp_addr
- */
-static void
-read_process_ack (struct Plugin *plugin,
- const struct GNUNET_MessageHeader *msg,
- const union UdpAddress *udp_addr,
- socklen_t udp_addr_len)
-{
- const struct GNUNET_MessageHeader *ack;
- const struct UDP_ACK_Message *udp_ack;
- struct GNUNET_HELLO_Address *address;
- struct GNUNET_ATS_Session *s;
- struct GNUNET_TIME_Relative flow_delay;
-
- if (ntohs (msg->size)
- < sizeof(struct UDP_ACK_Message) + sizeof(struct GNUNET_MessageHeader))
- {
- GNUNET_break_op (0);
- return;
- }
- udp_ack = (const struct UDP_ACK_Message *) msg;
- ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
- if (ntohs (ack->size) != ntohs (msg->size) - sizeof(struct UDP_ACK_Message))
- {
- GNUNET_break_op(0);
- return;
- }
- address = GNUNET_HELLO_address_allocate (&udp_ack->sender,
- PLUGIN_NAME,
- udp_addr,
- udp_addr_len,
- GNUNET_HELLO_ADDRESS_INFO_NONE);
- s = udp_plugin_lookup_session (plugin,
- address);
- if (NULL == s)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "UDP session of address %s for ACK not found\n",
- udp_address_to_string (plugin,
- address->address,
- address->address_length));
- GNUNET_HELLO_address_free (address);
- return;
- }
- if (NULL == s->frag_ctx)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
- "Fragmentation context of address %s for ACK (%s) not found\n",
- udp_address_to_string (plugin,
- address->address,
- address->address_length),
- GNUNET_FRAGMENT_print_ack (ack));
- GNUNET_HELLO_address_free (address);
- return;
- }
- GNUNET_HELLO_address_free (address);
-
- flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
- if (flow_delay.rel_value_us > GNUNET_CONSTANTS_LATENCY_WARN.rel_value_us)
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "We received a sending delay of %s for %s\n",
- GNUNET_STRINGS_relative_time_to_string (flow_delay,
- GNUNET_YES),
- GNUNET_i2s (&udp_ack->sender));
- else
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "We received a sending delay of %s for %s\n",
- GNUNET_STRINGS_relative_time_to_string (flow_delay,
- GNUNET_YES),
- GNUNET_i2s (&udp_ack->sender));
- /* Flow delay is for the reassembled packet, however, our delay
- is per packet, so we need to adjust: */
- flow_delay = GNUNET_TIME_relative_divide (flow_delay,
- 1 + (s->frag_ctx->payload_size /
- UDP_MTU));
- s->flow_delay_from_other_peer = flow_delay;
-
-
- if (GNUNET_OK !=
- GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag,
- ack))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
- (unsigned int) ntohs (msg->size),
- GNUNET_i2s (&udp_ack->sender),
- udp_address_to_string (plugin,
- udp_addr,
- udp_addr_len));
- /* Expect more ACKs to arrive */
- return;
- }
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Message from %s at %s full ACK'ed\n",
- GNUNET_i2s (&udp_ack->sender),
- udp_address_to_string (plugin,
- udp_addr,
- udp_addr_len));
-
- /* Remove fragmented message after successful sending */
- fragmented_message_done (s->frag_ctx,
- GNUNET_OK);
-}
-
-
/* ********************** Receiving ********************** */
}
-/**
- * Message tokenizer has broken up an incomming message. Pass it on
- * to the service.
- *
- * @param cls the `struct Plugin *`
- * @param client the `struct GNUNET_ATS_Session *`
- * @param hdr the actual message
- * @return #GNUNET_OK (always)
- */
-static int
-process_inbound_tokenized_messages (void *cls,
- void *client,
- const struct GNUNET_MessageHeader *hdr)
-{
- struct Plugin *plugin = cls;
- struct GNUNET_ATS_Session *session = client;
-
- if (GNUNET_YES == session->in_destroy)
- return GNUNET_OK;
- reschedule_session_timeout (session);
- session->flow_delay_for_other_peer
- = plugin->env->receive (plugin->env->cls,
- session->address,
- session,
- hdr);
- return GNUNET_OK;
-}
-
-
/**
* Functions with this signature are called whenever we need to close
* a session due to a disconnect or failure to establish a connection.
}
+/**
+ * Handle an ACK message.
+ *
+ * @param plugin the UDP plugin
+ * @param msg the (presumed) UDP ACK message
+ * @param udp_addr sender address
+ * @param udp_addr_len number of bytes in @a udp_addr
+ */
+static void
+read_process_ack (struct Plugin *plugin,
+ const struct GNUNET_MessageHeader *msg,
+ const union UdpAddress *udp_addr,
+ socklen_t udp_addr_len)
+{
+ const struct GNUNET_MessageHeader *ack;
+ const struct UDP_ACK_Message *udp_ack;
+ struct GNUNET_HELLO_Address *address;
+ struct GNUNET_ATS_Session *s;
+ struct GNUNET_TIME_Relative flow_delay;
+
+ if (ntohs (msg->size)
+ < sizeof(struct UDP_ACK_Message) + sizeof(struct GNUNET_MessageHeader))
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ udp_ack = (const struct UDP_ACK_Message *) msg;
+ ack = (const struct GNUNET_MessageHeader *) &udp_ack[1];
+ if (ntohs (ack->size) != ntohs (msg->size) - sizeof(struct UDP_ACK_Message))
+ {
+ GNUNET_break_op(0);
+ return;
+ }
+ address = GNUNET_HELLO_address_allocate (&udp_ack->sender,
+ PLUGIN_NAME,
+ udp_addr,
+ udp_addr_len,
+ GNUNET_HELLO_ADDRESS_INFO_NONE);
+ s = udp_plugin_lookup_session (plugin,
+ address);
+ if (NULL == s)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "UDP session of address %s for ACK not found\n",
+ udp_address_to_string (plugin,
+ address->address,
+ address->address_length));
+ GNUNET_HELLO_address_free (address);
+ return;
+ }
+ if (NULL == s->frag_ctx)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
+ "Fragmentation context of address %s for ACK (%s) not found\n",
+ udp_address_to_string (plugin,
+ address->address,
+ address->address_length),
+ GNUNET_FRAGMENT_print_ack (ack));
+ GNUNET_HELLO_address_free (address);
+ return;
+ }
+ GNUNET_HELLO_address_free (address);
+
+ if (UINT32_MAX == ntohl (udp_ack->delay))
+ {
+ /* Other peer asked for us to terminate the session */
+ udp_disconnect_session (plugin,
+ s);
+ return;
+ }
+ flow_delay.rel_value_us = (uint64_t) ntohl (udp_ack->delay);
+ if (flow_delay.rel_value_us > GNUNET_CONSTANTS_LATENCY_WARN.rel_value_us)
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "We received a sending delay of %s for %s\n",
+ GNUNET_STRINGS_relative_time_to_string (flow_delay,
+ GNUNET_YES),
+ GNUNET_i2s (&udp_ack->sender));
+ else
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "We received a sending delay of %s for %s\n",
+ GNUNET_STRINGS_relative_time_to_string (flow_delay,
+ GNUNET_YES),
+ GNUNET_i2s (&udp_ack->sender));
+ /* Flow delay is for the reassembled packet, however, our delay
+ is per packet, so we need to adjust: */
+ flow_delay = GNUNET_TIME_relative_divide (flow_delay,
+ 1 + (s->frag_ctx->payload_size /
+ UDP_MTU));
+ s->flow_delay_from_other_peer = flow_delay;
+
+
+ if (GNUNET_OK !=
+ GNUNET_FRAGMENT_process_ack (s->frag_ctx->frag,
+ ack))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "UDP processes %u-byte acknowledgement from `%s' at `%s'\n",
+ (unsigned int) ntohs (msg->size),
+ GNUNET_i2s (&udp_ack->sender),
+ udp_address_to_string (plugin,
+ udp_addr,
+ udp_addr_len));
+ /* Expect more ACKs to arrive */
+ return;
+ }
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Message from %s at %s full ACK'ed\n",
+ GNUNET_i2s (&udp_ack->sender),
+ udp_address_to_string (plugin,
+ udp_addr,
+ udp_addr_len));
+
+ /* Remove fragmented message after successful sending */
+ fragmented_message_done (s->frag_ctx,
+ GNUNET_OK);
+}
+
+
+/**
+ * Message tokenizer has broken up an incomming message. Pass it on
+ * to the service.
+ *
+ * @param cls the `struct Plugin *`
+ * @param client the `struct GNUNET_ATS_Session *`
+ * @param hdr the actual message
+ * @return #GNUNET_OK (always)
+ */
+static int
+process_inbound_tokenized_messages (void *cls,
+ void *client,
+ const struct GNUNET_MessageHeader *hdr)
+{
+ struct Plugin *plugin = cls;
+ struct GNUNET_ATS_Session *session = client;
+
+ if (GNUNET_YES == session->in_destroy)
+ return GNUNET_OK;
+ reschedule_session_timeout (session);
+ session->flow_delay_for_other_peer
+ = plugin->env->receive (plugin->env->cls,
+ session->address,
+ session,
+ hdr);
+ return GNUNET_OK;
+}
+
+
/**
* Destroy a session, plugin is being unloaded.
*
GNUNET_NO);
return;
}
- if (s->flow_delay_for_other_peer.rel_value_us <= UINT32_MAX)
+ if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us ==
+ s->flow_delay_for_other_peer.rel_value_us)
+ delay = UINT32_MAX;
+ else if (s->flow_delay_for_other_peer.rel_value_us < UINT32_MAX)
delay = s->flow_delay_for_other_peer.rel_value_us;
else
- delay = UINT32_MAX;
+ delay = UINT32_MAX - 1; /* largest value we can communicate */
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Sending ACK to `%s' including delay of %s\n",
udp_address_to_string (plugin,
return;
}
-
-
-
msg = (const struct GNUNET_MessageHeader *) buf;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"UDP received %u-byte message from `%s' type %u\n",
projects / oweals / gnunet.git / commitdiff