2 This file is part of GNUnet
3 (C) 2010, 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file transport/plugin_transport_udp.h
23 * @brief Implementation of the UDP transport protocol
24 * @author Christian Grothoff
25 * @author Nathan Evans
26 * @author Matthias Wachs
29 #include "gnunet_hello_lib.h"
30 #include "gnunet_util_lib.h"
31 #include "gnunet_fragmentation_lib.h"
32 #include "gnunet_nat_lib.h"
33 #include "gnunet_protocols.h"
34 #include "gnunet_resolver_service.h"
35 #include "gnunet_signatures.h"
36 #include "gnunet_constants.h"
37 #include "gnunet_statistics_service.h"
38 #include "gnunet_transport_service.h"
39 #include "gnunet_transport_plugin.h"
40 #include "transport.h"
42 #define LOG(kind,...) GNUNET_log_from (kind, "transport-udp", __VA_ARGS__)
44 #define DEBUG_UDP GNUNET_YES
47 * MTU for fragmentation subsystem. Should be conservative since
48 * all communicating peers MUST work with this MTU.
53 GNUNET_NETWORK_STRUCT_BEGIN
55 * Network format for IPv4 addresses.
60 * IPv4 address, in network byte order.
62 uint32_t ipv4_addr GNUNET_PACKED;
65 * Port number, in network byte order.
67 uint16_t u4_port GNUNET_PACKED;
72 * Network format for IPv6 addresses.
80 struct in6_addr ipv6_addr GNUNET_PACKED;
83 * Port number, in network byte order.
85 uint16_t u6_port GNUNET_PACKED;
87 GNUNET_NETWORK_STRUCT_END
91 * UDP Message-Packet header (after defragmentation).
98 struct GNUNET_MessageHeader header;
101 * Always zero for now.
106 * What is the identity of the sender
108 struct GNUNET_PeerIdentity sender;
114 * Encapsulation of all of the state of the plugin.
122 struct GNUNET_TRANSPORT_PluginEnvironment *env;
125 * Session of peers with whom we are currently connected,
126 * map of peer identity to 'struct PeerSession'.
128 struct GNUNET_CONTAINER_MultiHashMap *sessions;
131 * Session of peers with whom we are currently connected,
132 * map of peer identity to 'struct PeerSession'.
134 struct GNUNET_CONTAINER_MultiHashMap *inbound_sessions;
137 * Heap with all of our defragmentation activities.
139 struct GNUNET_CONTAINER_Heap *defrags;
144 GNUNET_SCHEDULER_TaskIdentifier select_task;
147 * Tokenizer for inbound messages.
149 struct GNUNET_SERVER_MessageStreamTokenizer *mst;
152 * Bandwidth tracker to limit global UDP traffic.
154 struct GNUNET_BANDWIDTH_Tracker tracker;
157 * Address we were told to bind to exclusively (IPv4).
162 * Address we were told to bind to exclusively (IPv6).
167 * Handle to NAT traversal support.
169 struct GNUNET_NAT_Handle *nat;
174 struct GNUNET_NETWORK_FDSet *rs;
179 struct GNUNET_NETWORK_FDSet *ws;
182 * The read socket for IPv4
184 struct GNUNET_NETWORK_Handle *sockv4;
187 * The read socket for IPv6
189 struct GNUNET_NETWORK_Handle *sockv6;
192 * Beacon broadcasting
193 * -------------------
199 struct GNUNET_TIME_Relative broadcast_interval;
202 * Broadcast with IPv4
207 * Broadcast with IPv6
213 * Tokenizer for inbound messages.
215 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv6_mst;
216 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv4_mst;
219 * ID of select broadcast task
221 GNUNET_SCHEDULER_TaskIdentifier send_ipv4_broadcast_task;
224 * ID of select broadcast task
226 GNUNET_SCHEDULER_TaskIdentifier send_ipv6_broadcast_task;
229 * IPv6 multicast address
231 struct sockaddr_in6 ipv6_multicast_address;
234 * DLL of IPv4 broadcast addresses
236 struct BroadcastAddress *ipv4_broadcast_tail;
237 struct BroadcastAddress *ipv4_broadcast_head;
241 * expected delay for ACKs
243 struct GNUNET_TIME_Relative last_expected_delay;
251 * Port we broadcasting on.
253 uint16_t broadcast_port;
261 * Port we advertise on.
269 udp_address_to_string (void *cls, const void *addr, size_t addrlen);
272 udp_broadcast_receive ();
275 setup_broadcast (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4);
278 stop_broadcast (struct Plugin *plugin);
280 /* end of plugin_transport_udp.h */