bird/proto/ospf/packet.h

/*
 *      BIRD -- OSPF
 *
 *      (c) 1999--2004 Ondrej Filip <feela@network.cz>
 *
 *      Can be freely distributed and used under the terms of the GNU GPL.
 *
 */

#ifndef _BIRD_OSPF_PACKET_H_
#define _BIRD_OSPF_PACKET_H_

void ospf_pkt_fill_hdr(struct ospf_iface *ifa, void *buf, u8 h_type);
unsigned ospf_pkt_maxsize(struct ospf_iface *ifa);
int ospf_rx_hook(sock * sk, int size);
void ospf_tx_hook(sock * sk);
void ospf_err_hook(sock * sk, int err);
void ospf_send_to(struct ospf_iface *ifa, ip_addr ip);

void ospf_send_to_agt(struct ospf_iface *ifa, u8 state);
void ospf_send_to_bdr(struct ospf_iface *ifa);

static inline void ospf_send_to_all(struct ospf_iface *ifa)
{ ospf_send_to(ifa, ifa->all_routers); }

static inline void ospf_send_to_des(struct ospf_iface *ifa)
{
  if (ipa_nonzero(ifa->des_routers))
    ospf_send_to(ifa, ifa->des_routers);
  else
    ospf_send_to_bdr(ifa);
}

static inline unsigned ospf_pkt_hdrlen(struct proto_ospf *po)
{
  return ospf_is_v2(po) ?
    (sizeof(struct ospf_packet) + sizeof(union ospf_auth)) :
    sizeof(struct ospf_packet);
}


static inline void * ospf_tx_buffer(struct ospf_iface *ifa)
{ return ifa->sk->tbuf; }

static inline unsigned ospf_pkt_bufsize(struct ospf_iface *ifa)
{
  /* Reserve buffer space for authentication footer */
  unsigned res_size = (ifa->autype == OSPF_AUTH_CRYPT) ? OSPF_AUTH_CRYPT_SIZE : 0;
  return ifa->sk->tbsize - res_size;
}


#endif /* _BIRD_OSPF_PACKET_H_ */