/*

OLSR MDNS plugin.

Written by Saverio Proto <zioproto@gmail.com> and Claudio Pisa <clauz@ninux.org>.

    This file is part of OLSR MDNS PLUGIN.

    The OLSR MDNS PLUGIN is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation, either version 3 of the License, or

    (at your option) any later version.

    The OLSR MDNS PLUGIN 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 General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef _BMF_NETWORKINTERFACES_H

#define _BMF_NETWORKINTERFACES_H

/* System includes */

#include <netinet/in.h> /* struct in_addr */

/* OLSR includes */

#include "olsr_types.h" /* olsr_ip_addr */

#include "plugin.h" /* union set_plugin_parameter_addon */

/* Plugin includes */

#include "Packet.h" /* IFHWADDRLEN */

#include "mdns.h"

/* Size of buffer in which packets are received */

#define BMF_BUFFER_SIZE 2048

struct TBmfInterface

{

  /* File descriptor of raw packet socket, used for capturing multicast packets */

  int capturingSkfd;

  /* File descriptor of UDP (datagram) socket for encapsulated multicast packets.

   * Only used for OLSR-enabled interfaces; set to -1 if interface is not OLSR-enabled. */

  int encapsulatingSkfd;

  /* File descriptor of UDP packet socket, used for listening to encapsulation packets.

   * Used only when PlParam "BmfMechanism" is set to "UnicastPromiscuous". */

  int listeningSkfd;

  unsigned char macAddr[IFHWADDRLEN];

  char ifName[IFNAMSIZ];

  /* OLSRs idea of this network interface. NULL if this interface is not

   * OLSR-enabled. */

  struct interface* olsrIntf;

  /* IP address of this network interface */

  union olsr_ip_addr intAddr;

  /* Broadcast address of this network interface */

  union olsr_ip_addr broadAddr;

  #define FRAGMENT_HISTORY_SIZE 10

  struct TFragmentHistory

  {

    u_int16_t ipId;

    u_int8_t ipProto;

    struct in_addr ipSrc;

    struct in_addr ipDst;

  } fragmentHistory [FRAGMENT_HISTORY_SIZE];

  int nextFragmentHistoryEntry;

  /* Number of received and transmitted BMF packets on this interface */

  u_int32_t nBmfPacketsRx;

  u_int32_t nBmfPacketsRxDup;

  u_int32_t nBmfPacketsTx;

  /* Next element in list */

  struct TBmfInterface* next;

};

extern struct TBmfInterface* BmfInterfaces;

extern int HighestSkfd;

extern fd_set InputSet;

extern int EtherTunTapFd;

extern char EtherTunTapIfName[];

/* 10.255.255.253 in host byte order */

#define ETHERTUNTAPDEFAULTIP 0x0AFFFFFD

extern u_int32_t EtherTunTapIp;

extern u_int32_t EtherTunTapIpMask;

extern u_int32_t EtherTunTapIpBroadcast;

enum TBmfMechanism { BM_BROADCAST = 0, BM_UNICAST_PROMISCUOUS };

extern enum TBmfMechanism BmfMechanism;

int SetBmfInterfaceName(const char* ifname, void* data, set_plugin_parameter_addon addon);

int SetBmfInterfaceIp(const char* ip, void* data, set_plugin_parameter_addon addon);

int SetCapturePacketsOnOlsrInterfaces(const char* enable, void* data, set_plugin_parameter_addon addon);

int SetBmfMechanism(const char* mechanism, void* data, set_plugin_parameter_addon addon);

int DeactivateSpoofFilter(void);

void RestoreSpoofFilter(void);

#define MAX_UNICAST_NEIGHBORS 10

struct TBestNeighbors

{

  struct link_entry* links[MAX_UNICAST_NEIGHBORS];

};

void FindNeighbors(

  struct TBestNeighbors* neighbors,

  struct link_entry** bestNeighbor,

  struct TBmfInterface* intf,

  union olsr_ip_addr* source,

  union olsr_ip_addr* forwardedBy,

  union olsr_ip_addr* forwardedTo,

  int* nPossibleNeighbors);

int CreateBmfNetworkInterfaces(struct interface* skipThisIntf);

void AddInterface(struct interface* newIntf);

void CloseBmfNetworkInterfaces(void);

int AddNonOlsrBmfIf(const char* ifName, void* data, set_plugin_parameter_addon addon);

int IsNonOlsrBmfIf(const char* ifName);

void CheckAndUpdateLocalBroadcast(unsigned char* ipPacket, union olsr_ip_addr* broadAddr);

void AddMulticastRoute(void);

void DeleteMulticastRoute(void);

#endif /* _BMF_NETWORKINTERFACES_H */

/*

 * Local Variables:

 * c-basic-offset: 2

 * indent-tabs-mode: nil

 * End:

 */