115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (C) B.A.T.M.A.N. contributors:
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*
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* Marek Lindner
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*/
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#include "gateway_common.h"
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#include "main.h"
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#include <linux/atomic.h>
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#include <linux/byteorder/generic.h>
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#include <linux/stddef.h>
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#include <linux/types.h>
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#include <uapi/linux/batadv_packet.h>
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#include <uapi/linux/batman_adv.h>
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#include "gateway_client.h"
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#include "tvlv.h"
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/**
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* batadv_gw_tvlv_container_update() - update the gw tvlv container after
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* gateway setting change
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* @bat_priv: the bat priv with all the soft interface information
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*/
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void batadv_gw_tvlv_container_update(struct batadv_priv *bat_priv)
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{
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struct batadv_tvlv_gateway_data gw;
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u32 down, up;
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char gw_mode;
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gw_mode = atomic_read(&bat_priv->gw.mode);
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switch (gw_mode) {
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case BATADV_GW_MODE_OFF:
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case BATADV_GW_MODE_CLIENT:
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batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_GW, 1);
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break;
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case BATADV_GW_MODE_SERVER:
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down = atomic_read(&bat_priv->gw.bandwidth_down);
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up = atomic_read(&bat_priv->gw.bandwidth_up);
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gw.bandwidth_down = htonl(down);
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gw.bandwidth_up = htonl(up);
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batadv_tvlv_container_register(bat_priv, BATADV_TVLV_GW, 1,
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&gw, sizeof(gw));
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break;
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}
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}
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/**
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* batadv_gw_tvlv_ogm_handler_v1() - process incoming gateway tvlv container
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* @bat_priv: the bat priv with all the soft interface information
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* @orig: the orig_node of the ogm
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* @flags: flags indicating the tvlv state (see batadv_tvlv_handler_flags)
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* @tvlv_value: tvlv buffer containing the gateway data
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* @tvlv_value_len: tvlv buffer length
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*/
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static void batadv_gw_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv,
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struct batadv_orig_node *orig,
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u8 flags,
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void *tvlv_value, u16 tvlv_value_len)
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{
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struct batadv_tvlv_gateway_data gateway, *gateway_ptr;
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/* only fetch the tvlv value if the handler wasn't called via the
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* CIFNOTFND flag and if there is data to fetch
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*/
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if (flags & BATADV_TVLV_HANDLER_OGM_CIFNOTFND ||
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tvlv_value_len < sizeof(gateway)) {
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gateway.bandwidth_down = 0;
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gateway.bandwidth_up = 0;
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} else {
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gateway_ptr = tvlv_value;
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gateway.bandwidth_down = gateway_ptr->bandwidth_down;
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gateway.bandwidth_up = gateway_ptr->bandwidth_up;
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if (gateway.bandwidth_down == 0 ||
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gateway.bandwidth_up == 0) {
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gateway.bandwidth_down = 0;
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gateway.bandwidth_up = 0;
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}
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}
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batadv_gw_node_update(bat_priv, orig, &gateway);
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/* restart gateway selection */
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if (gateway.bandwidth_down != 0 &&
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atomic_read(&bat_priv->gw.mode) == BATADV_GW_MODE_CLIENT)
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batadv_gw_check_election(bat_priv, orig);
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}
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/**
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* batadv_gw_init() - initialise the gateway handling internals
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* @bat_priv: the bat priv with all the soft interface information
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*/
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void batadv_gw_init(struct batadv_priv *bat_priv)
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{
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if (bat_priv->algo_ops->gw.init_sel_class)
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bat_priv->algo_ops->gw.init_sel_class(bat_priv);
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else
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atomic_set(&bat_priv->gw.sel_class, 1);
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batadv_tvlv_handler_register(bat_priv, batadv_gw_tvlv_ogm_handler_v1,
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NULL, NULL, BATADV_TVLV_GW, 1,
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BATADV_TVLV_HANDLER_OGM_CIFNOTFND);
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}
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/**
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* batadv_gw_free() - free the gateway handling internals
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* @bat_priv: the bat priv with all the soft interface information
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*/
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void batadv_gw_free(struct batadv_priv *bat_priv)
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{
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batadv_tvlv_container_unregister(bat_priv, BATADV_TVLV_GW, 1);
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batadv_tvlv_handler_unregister(bat_priv, BATADV_TVLV_GW, 1);
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}
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