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With the current TT mechanism a new client joining the network is not immediately able to communicate with other hosts because its MAC address has not been announced yet. This situation holds until the first OGM containing its joining event will be spread over the mesh network. This behaviour can be acceptable in networks where the originator interval is a small value (e.g. 1sec) but if that value is set to an higher time (e.g. 5secs) the client could suffer from several malfunctions like DHCP client timeouts, etc. This patch adds an early detection mechanism that makes nodes in the network able to recognise "not yet announced clients" by means of the broadcast packets they emitted on connection (e.g. ARP or DHCP request). The added client will then be confirmed upon receiving the OGM claiming it or purged if such OGM is not received within a fixed amount of time. Signed-off-by: Antonio Quartulli <ordex@autistici.org>
67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich, Antonio Quartulli
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
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#define _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
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int batadv_tt_len(int changes_num);
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int batadv_tt_init(struct batadv_priv *bat_priv);
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void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
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int ifindex);
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void batadv_tt_local_remove(struct batadv_priv *bat_priv,
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const uint8_t *addr, const char *message,
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bool roaming);
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int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset);
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void batadv_tt_global_add_orig(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const unsigned char *tt_buff, int tt_buff_len);
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int batadv_tt_global_add(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const unsigned char *addr, uint8_t flags,
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uint8_t ttvn);
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int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset);
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void batadv_tt_global_del_orig(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const char *message);
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struct batadv_orig_node *batadv_transtable_search(struct batadv_priv *bat_priv,
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const uint8_t *src,
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const uint8_t *addr);
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void batadv_tt_free(struct batadv_priv *bat_priv);
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bool batadv_send_tt_response(struct batadv_priv *bat_priv,
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struct batadv_tt_query_packet *tt_request);
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bool batadv_is_my_client(struct batadv_priv *bat_priv, const uint8_t *addr);
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void batadv_handle_tt_response(struct batadv_priv *bat_priv,
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struct batadv_tt_query_packet *tt_response);
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bool batadv_is_ap_isolated(struct batadv_priv *bat_priv, uint8_t *src,
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uint8_t *dst);
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void batadv_tt_update_orig(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const unsigned char *tt_buff, uint8_t tt_num_changes,
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uint8_t ttvn, uint16_t tt_crc);
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int batadv_tt_append_diff(struct batadv_priv *bat_priv,
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unsigned char **packet_buff, int *packet_buff_len,
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int packet_min_len);
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bool batadv_tt_global_client_is_roaming(struct batadv_priv *bat_priv,
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uint8_t *addr);
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bool batadv_tt_add_temporary_global_entry(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig_node,
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const unsigned char *addr);
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#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
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