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/*
* Copyright (c) 2023 Balazs Scheidler <bazsi77@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
int number_of_sockets;
SEC("socket")
int random_choice(struct __sk_buff *skb)
{
if (number_of_sockets == 0)
return -1;
return bpf_get_prandom_u32() % number_of_sockets;
}
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