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.
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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,
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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_NO
45 #define DEBUG_UDP_BROADCASTING GNUNET_NO
48 * MTU for fragmentation subsystem. Should be conservative since
49 * all communicating peers MUST work with this MTU.
54 GNUNET_NETWORK_STRUCT_BEGIN
56 * Network format for IPv4 addresses.
61 * IPv4 address, in network byte order.
63 uint32_t ipv4_addr GNUNET_PACKED;
66 * Port number, in network byte order.
68 uint16_t u4_port GNUNET_PACKED;
73 * Network format for IPv6 addresses.
81 struct in6_addr ipv6_addr GNUNET_PACKED;
84 * Port number, in network byte order.
86 uint16_t u6_port GNUNET_PACKED;
88 GNUNET_NETWORK_STRUCT_END
92 * UDP Message-Packet header (after defragmentation).
99 struct GNUNET_MessageHeader header;
102 * Always zero for now.
107 * What is the identity of the sender
109 struct GNUNET_PeerIdentity sender;
115 * Encapsulation of all of the state of the plugin.
123 struct GNUNET_TRANSPORT_PluginEnvironment *env;
126 * Session of peers with whom we are currently connected,
127 * map of peer identity to 'struct PeerSession'.
129 struct GNUNET_CONTAINER_MultiHashMap *sessions;
132 * Heap with all of our defragmentation activities.
134 struct GNUNET_CONTAINER_Heap *defrag_ctxs;
139 GNUNET_SCHEDULER_TaskIdentifier select_task;
140 GNUNET_SCHEDULER_TaskIdentifier select_task_v6;
143 * Tokenizer for inbound messages.
145 struct GNUNET_SERVER_MessageStreamTokenizer *mst;
148 * Bandwidth tracker to limit global UDP traffic.
150 struct GNUNET_BANDWIDTH_Tracker tracker;
153 * Address we were told to bind to exclusively (IPv4).
158 * Address we were told to bind to exclusively (IPv6).
163 * Handle to NAT traversal support.
165 struct GNUNET_NAT_Handle *nat;
170 struct GNUNET_NETWORK_FDSet *rs_v4;
175 struct GNUNET_NETWORK_FDSet *ws_v4;
179 * The read socket for IPv4
181 struct GNUNET_NETWORK_Handle *sockv4;
187 struct GNUNET_NETWORK_FDSet *rs_v6;
192 struct GNUNET_NETWORK_FDSet *ws_v6;
195 * The read socket for IPv6
197 struct GNUNET_NETWORK_Handle *sockv6;
200 * Beacon broadcasting
201 * -------------------
207 struct GNUNET_TIME_Relative broadcast_interval;
210 * Broadcast with IPv4
215 * Broadcast with IPv6
221 * Tokenizer for inbound messages.
223 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv6_mst;
224 struct GNUNET_SERVER_MessageStreamTokenizer *broadcast_ipv4_mst;
227 * ID of select broadcast task
229 GNUNET_SCHEDULER_TaskIdentifier send_ipv4_broadcast_task;
232 * ID of select broadcast task
234 GNUNET_SCHEDULER_TaskIdentifier send_ipv6_broadcast_task;
237 * IPv6 multicast address
239 struct sockaddr_in6 ipv6_multicast_address;
242 * DLL of IPv4 broadcast addresses
244 struct BroadcastAddress *ipv4_broadcast_tail;
245 struct BroadcastAddress *ipv4_broadcast_head;
253 * Port we broadcasting on.
255 uint16_t broadcast_port;
263 * Port we advertise on.
267 struct UDPMessageWrapper *ipv4_queue_head;
268 struct UDPMessageWrapper *ipv4_queue_tail;
270 struct UDPMessageWrapper *ipv6_queue_head;
271 struct UDPMessageWrapper *ipv6_queue_tail;
276 udp_address_to_string (void *cls, const void *addr, size_t addrlen);
279 udp_broadcast_receive ();
282 setup_broadcast (struct Plugin *plugin, struct sockaddr_in6 *serverAddrv6, struct sockaddr_in *serverAddrv4);
285 stop_broadcast (struct Plugin *plugin);
287 /* end of plugin_transport_udp.h */