plugin_transport_udp.h

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/*
     This file is part of GNUnet
     Copyright (C) 2010-2014 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet is distributed in the hope that it will be useful, but
     WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Affero General Public License for more details.

     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */

#ifndef PLUGIN_TRANSPORT_UDP_H
#define PLUGIN_TRANSPORT_UDP_H

#include "platform.h"
#include "gnunet_hello_lib.h"
#include "gnunet_util_lib.h"
#include "gnunet_fragmentation_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_resolver_service.h"
#include "gnunet_signatures.h"
#include "gnunet_constants.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
#include "gnunet_transport_plugin.h"
#include "transport.h"

#define LOG(kind, ...) GNUNET_log_from(kind, "transport-udp", __VA_ARGS__)

#define PLUGIN_NAME "udp"

#define DEBUG_UDP GNUNET_NO

#define DEBUG_UDP_BROADCASTING GNUNET_NO

#define UDP_MTU 1400


GNUNET_NETWORK_STRUCT_BEGIN
struct IPv4UdpAddress {
  uint32_t options GNUNET_PACKED;

  uint32_t ipv4_addr GNUNET_PACKED;

  uint16_t u4_port GNUNET_PACKED;
};


struct IPv6UdpAddress {
  uint32_t options GNUNET_PACKED;

  struct in6_addr ipv6_addr GNUNET_PACKED;

  uint16_t u6_port GNUNET_PACKED;
};
GNUNET_NETWORK_STRUCT_END

union UdpAddress {
  struct IPv4UdpAddress v4;

  struct IPv6UdpAddress v6;
};


struct UDP_MessageWrapper;


struct PrettyPrinterContext;


struct Plugin {
  struct GNUNET_TRANSPORT_PluginEnvironment *env;

  struct GNUNET_CONTAINER_MultiPeerMap *sessions;

  struct GNUNET_CONTAINER_Heap *defrag_ctxs;

  struct GNUNET_SCHEDULER_Task *select_task_v4;

  struct GNUNET_SCHEDULER_Task *select_task_v6;

  struct GNUNET_BANDWIDTH_Tracker tracker;

  char *bind4_address;

  char *bind6_address;

  struct GNUNET_NAT_Handle *nat;

  struct GNUNET_NAT_STUN_Handle *stun;

  struct GNUNET_NETWORK_Handle *sockv4;

  struct GNUNET_NETWORK_Handle *sockv6;

  struct BroadcastAddress *broadcast_tail;

  struct BroadcastAddress *broadcast_head;

  struct UDP_MessageWrapper *ipv4_queue_head;

  struct UDP_MessageWrapper *ipv4_queue_tail;

  struct UDP_MessageWrapper *ipv6_queue_head;

  struct UDP_MessageWrapper *ipv6_queue_tail;

  struct PrettyPrinterContext *ppc_dll_head;

  struct PrettyPrinterContext *ppc_dll_tail;

  GNUNET_TRANSPORT_SessionInfoCallback sic;

  void *sic_cls;

  struct sockaddr_in6 ipv6_multicast_address;

  struct GNUNET_TIME_Relative broadcast_interval;

  int64_t bytes_in_buffer;

  uint32_t myoptions;

  int enable_ipv6;

  int enable_ipv4;

  int enable_broadcasting;

  int enable_broadcasting_receiving;

  uint16_t broadcast_port;

  uint16_t port;

  uint16_t aport;
};


const char *
udp_address_to_string(void *cls,
                      const void *addr,
                      size_t addrlen);


void
udp_broadcast_receive(struct Plugin *plugin,
                      const char *buf,
                      ssize_t size,
                      const union UdpAddress *udp_addr,
                      size_t udp_addr_len,
                      enum GNUNET_NetworkType network_type);


void
setup_broadcast(struct Plugin *plugin,
                struct sockaddr_in6 *server_addrv6,
                struct sockaddr_in *server_addrv4);


void
stop_broadcast(struct Plugin *plugin);

/*#ifndef PLUGIN_TRANSPORT_UDP_H*/
#endif
/* end of plugin_transport_udp.h */