cc47f66e6b
With the current client announcement implementation, in case of roaming, an update is triggered on the new AP serving the client. At that point the new information is spread around by means of the OGM broadcasting mechanism. Until this operations is not executed, no node is able to correctly route traffic towards the client. This obviously causes packet drops and introduces a delay in the time needed by the client to recover its connections. A new packet type called ROAMING_ADVERTISEMENT is added to account this issue. This message is sent in case of roaming from the new AP serving the client to the old one and will contain the client MAC address. In this way an out-of-OGM update is immediately committed, so that the old node can update its global translation table. Traffic reaching this node will then be redirected to the correct destination utilising the fresher information. Thus reducing the packet drops and the connection recovery delay. Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Sven Eckelmann <sven@narfation.org>
67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/*
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* Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
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*
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* Marek Lindner, Simon Wunderlich
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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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*/
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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 tt_len(int changes_num);
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int tt_changes_fill_buffer(struct bat_priv *bat_priv,
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unsigned char *buff, int buff_len);
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int tt_init(struct bat_priv *bat_priv);
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void tt_local_add(struct net_device *soft_iface, const uint8_t *addr);
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void tt_local_remove(struct bat_priv *bat_priv,
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const uint8_t *addr, const char *message, bool roaming);
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int tt_local_seq_print_text(struct seq_file *seq, void *offset);
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void tt_global_add_orig(struct bat_priv *bat_priv,
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struct orig_node *orig_node,
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const unsigned char *tt_buff, int tt_buff_len);
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int tt_global_add(struct bat_priv *bat_priv,
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struct orig_node *orig_node, const unsigned char *addr,
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uint8_t ttvn, bool roaming);
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int tt_global_seq_print_text(struct seq_file *seq, void *offset);
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void tt_global_del_orig(struct bat_priv *bat_priv,
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struct orig_node *orig_node, const char *message);
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void tt_global_del(struct bat_priv *bat_priv,
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struct orig_node *orig_node, const unsigned char *addr,
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const char *message, bool roaming);
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struct orig_node *transtable_search(struct bat_priv *bat_priv,
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const uint8_t *addr);
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void tt_save_orig_buffer(struct bat_priv *bat_priv, struct orig_node *orig_node,
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const unsigned char *tt_buff, uint8_t tt_num_changes);
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uint16_t tt_local_crc(struct bat_priv *bat_priv);
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uint16_t tt_global_crc(struct bat_priv *bat_priv, struct orig_node *orig_node);
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void tt_free(struct bat_priv *bat_priv);
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int send_tt_request(struct bat_priv *bat_priv,
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struct orig_node *dst_orig_node, uint8_t hvn,
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uint16_t tt_crc, bool full_table);
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bool send_tt_response(struct bat_priv *bat_priv,
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struct tt_query_packet *tt_request);
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void tt_update_changes(struct bat_priv *bat_priv, struct orig_node *orig_node,
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uint16_t tt_num_changes, uint8_t ttvn,
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struct tt_change *tt_change);
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bool is_my_client(struct bat_priv *bat_priv, const uint8_t *addr);
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void handle_tt_response(struct bat_priv *bat_priv,
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struct tt_query_packet *tt_response);
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void send_roam_adv(struct bat_priv *bat_priv, uint8_t *client,
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struct orig_node *orig_node);
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#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
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