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 PLUGIN_NAME "udp"
46 #define DEBUG_UDP GNUNET_NO
47 #define DEBUG_UDP_BROADCASTING GNUNET_NO
50 * MTU for fragmentation subsystem. Should be conservative since
51 * all communicating peers MUST work with this MTU.
56 GNUNET_NETWORK_STRUCT_BEGIN
58 * Network format for IPv4 addresses.
63 * Optional options and flags for this address
65 uint32_t options GNUNET_PACKED;
68 * IPv4 address, in network byte order.
70 uint32_t ipv4_addr GNUNET_PACKED;
73 * Port number, in network byte order.
75 uint16_t u4_port GNUNET_PACKED;
80 * Network format for IPv6 addresses.
85 * Optional options and flags for this address
87 uint32_t options GNUNET_PACKED;
92 struct in6_addr ipv6_addr GNUNET_PACKED;
95 * Port number, in network byte order.
97 uint16_t u6_port GNUNET_PACKED;
99 GNUNET_NETWORK_STRUCT_END
103 * UDP Message-Packet header (after defragmentation).
110 struct GNUNET_MessageHeader header;
113 * Always zero for now.
118 * What is the identity of the sender
120 struct GNUNET_PeerIdentity sender;
126 * Encapsulation of all of the state of the plugin.
134 struct GNUNET_TRANSPORT_PluginEnvironment *env;
137 * Session of peers with whom we are currently connected,
138 * map of peer identity to 'struct PeerSession'.
140 struct GNUNET_CONTAINER_MultiPeerMap *sessions;
143 * Heap with all of our defragmentation activities.
145 struct GNUNET_CONTAINER_Heap *defrag_ctxs;
150 GNUNET_SCHEDULER_TaskIdentifier select_task;
151 GNUNET_SCHEDULER_TaskIdentifier select_task_v6;
154 * Tokenizer for inbound messages.
156 struct GNUNET_SERVER_MessageStreamTokenizer *mst;
159 * Bandwidth tracker to limit global UDP traffic.
161 struct GNUNET_BANDWIDTH_Tracker tracker;
164 * Address we were told to bind to exclusively (IPv4).
169 * Address we were told to bind to exclusively (IPv6).
175 * Bytes currently in buffer
177 int64_t bytes_in_buffer;
180 * Handle to NAT traversal support.
182 struct GNUNET_NAT_Handle *nat;
187 struct GNUNET_NETWORK_FDSet *rs_v4;
192 struct GNUNET_NETWORK_FDSet *ws_v4;
196 * The read socket for IPv4
198 struct GNUNET_NETWORK_Handle *sockv4;
204 struct GNUNET_NETWORK_FDSet *rs_v6;
209 struct GNUNET_NETWORK_FDSet *ws_v6;
212 * The read socket for IPv6
214 struct GNUNET_NETWORK_Handle *sockv6;
217 * Beacon broadcasting
218 * -------------------
224 struct GNUNET_TIME_Relative broadcast_interval;
227 * Tokenizer for inbound messages.
229 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv6_mst;
230 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv4_mst;
233 * IPv6 multicast address
235 struct sockaddr_in6 ipv6_multicast_address;
238 * DLL of broadcast addresses
240 struct BroadcastAddress *broadcast_tail;
241 struct BroadcastAddress *broadcast_head;
244 * Is IPv6 enabled: GNUNET_YES or GNUNET_NO
249 * Is IPv4 enabled: GNUNET_YES or GNUNET_NO
254 * Is broadcasting enabled: GNUNET_YES or GNUNET_NO
256 int enable_broadcasting;
259 * Is receiving broadcasts enabled: GNUNET_YES or GNUNET_NO
261 int enable_broadcasting_receiving;
264 * Port we broadcasting on.
266 uint16_t broadcast_port;
274 * Port we advertise on.
278 struct UDP_MessageWrapper *ipv4_queue_head;
279 struct UDP_MessageWrapper *ipv4_queue_tail;
281 struct UDP_MessageWrapper *ipv6_queue_head;
282 struct UDP_MessageWrapper *ipv6_queue_tail;
287 udp_address_to_string (void *cls, const void *addr, size_t addrlen);
290 udp_broadcast_receive (struct Plugin *plugin,
293 const struct sockaddr *addr,
297 setup_broadcast (struct Plugin *plugin,
298 struct sockaddr_in6 *server_addrv6,
299 struct sockaddr_in *server_addrv4);
302 stop_broadcast (struct Plugin *plugin);
304 /* end of plugin_transport_udp.h */