55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2014, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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, see <https://www.gnu.org/licenses/>.
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*
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*/
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#include "uhub.h"
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void flood_control_reset(struct flood_control* data)
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{
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memset(data, 0, sizeof(struct flood_control));
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}
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int flood_control_check(struct flood_control* data, size_t max_count, size_t time_delay, time_t now)
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{
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// Is flood control disabled?
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if (!time_delay || !max_count)
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return 0;
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// No previous message, or a long time since
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// the last message. We allow the message.
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if (!data->time || ((now - data->time) > time_delay))
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{
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data->time = now;
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data->count = 1;
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return 0;
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}
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// increase hit count
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data->count++;
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// did we overflow the limits yet?
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if (data->count < max_count)
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return 0;
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// if we continue sending spam messages we extend the flood interval
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// based on the last message.
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data->time = now;
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return 1;
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}
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