/*
  PIM for Quagga
  Copyright (C) 2008  Everton da Silva Marques

  This program 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 2 of the License, or
  (at your option) any later version.

  This program 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 this program; see the file COPYING; if not, write to the
  Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  MA 02110-1301 USA
  
  $QuaggaId: $Format:%an, %ai, %h$ $
*/

#ifndef PIM_PIM_H
#define PIM_PIM_H

#include <zebra.h>

#include "if.h"

#define PIM_PIM_BUFSIZE_READ  (20000)
#define PIM_PIM_BUFSIZE_WRITE (20000)

#define PIM_NEXTHOP_IFINDEX_TAB_SIZE (20)

#define PIM_DEFAULT_HELLO_PERIOD                 (30)   /* seconds, RFC 4601: 4.11 */
#define PIM_DEFAULT_TRIGGERED_HELLO_DELAY        (5)    /* seconds, RFC 4601: 4.11 */
#define PIM_DEFAULT_DR_PRIORITY                  (1)    /* RFC 4601: 4.3.1 */
#define PIM_DEFAULT_PROPAGATION_DELAY_MSEC       (500)  /* RFC 4601: 4.11.  Timer Values */
#define PIM_DEFAULT_OVERRIDE_INTERVAL_MSEC       (2500) /* RFC 4601: 4.11.  Timer Values */
#define PIM_DEFAULT_CAN_DISABLE_JOIN_SUPPRESSION (0)    /* boolean */
#define PIM_DEFAULT_T_PERIODIC                   (60)   /* RFC 4601: 4.11.  Timer Values */

#define PIM_MSG_TYPE_HELLO      (0)
#define PIM_MSG_TYPE_REGISTER   (1)
#define PIM_MSG_TYPE_REG_STOP   (2)
#define PIM_MSG_TYPE_JOIN_PRUNE (3)
#define PIM_MSG_TYPE_BOOTSTRAP  (4)
#define PIM_MSG_TYPE_ASSERT     (5)
#define PIM_MSG_TYPE_GRAFT      (6)
#define PIM_MSG_TYPE_GRAFT_ACK  (7)
#define PIM_MSG_TYPE_CANDIDATE  (8)

#define PIM_MSG_HDR_OFFSET_VERSION(pim_msg) (pim_msg)
#define PIM_MSG_HDR_OFFSET_TYPE(pim_msg) (pim_msg)
#define PIM_MSG_HDR_OFFSET_RESERVED(pim_msg) (((char *)(pim_msg)) + 1)
#define PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg) (((char *)(pim_msg)) + 2)

#define PIM_MSG_HDR_GET_VERSION(pim_msg) ((*(uint8_t*) PIM_MSG_HDR_OFFSET_VERSION(pim_msg)) >> 4)
#define PIM_MSG_HDR_GET_TYPE(pim_msg) ((*(uint8_t*) PIM_MSG_HDR_OFFSET_TYPE(pim_msg)) & 0xF)
#define PIM_MSG_HDR_GET_CHECKSUM(pim_msg) (*(uint16_t*) PIM_MSG_HDR_OFFSET_CHECKSUM(pim_msg))

void pim_ifstat_reset(struct interface *ifp);
void pim_sock_reset(struct interface *ifp);
int pim_sock_add(struct interface *ifp);
void pim_sock_delete(struct interface *ifp, const char *delete_message);
void pim_hello_restart_now(struct interface *ifp);
void pim_hello_restart_triggered(struct interface *ifp);

int pim_pim_packet(struct interface *ifp, uint8_t *buf, size_t len);

int pim_msg_send(int fd,
		 struct in_addr dst,
		 uint8_t *pim_msg,
		 int pim_msg_size,
		 const char *ifname);

#endif /* PIM_PIM_H */