/*
* in_dummy.c Dummy Input Method
*
* Copyright (c) 2001-2004 Thomas Graf <tgraf@suug.ch>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <bmon/bmon.h>
#include <bmon/input.h>
#include <bmon/node.h>
#include <bmon/item.h>
#include <bmon/utils.h>
static b_cnt_t c_rx_b_inc = 1000000000;
static b_cnt_t c_tx_b_inc = 80000000;
static b_cnt_t c_rx_p_inc = 1000;
static b_cnt_t c_tx_p_inc = 800;
static int c_numdev = 5;
static int c_randomize = 0;
static int c_mtu = 1540;
static int c_maxpps = 100000;
static void dummy_read(void)
{
int n;
for (n = 0; n < c_numdev; n++) {
char ifname[IFNAMSIZ];
item_t *it;
snprintf(ifname, sizeof(ifname), "dummy%d", n);
it = lookup_item(get_local_node(), ifname, 0, 0);
if (it == NULL)
return;
it->i_major_attr = BYTES;
it->i_minor_attr = PACKETS;
if (c_randomize) {
b_cnt_t rx = rand() % c_maxpps;
b_cnt_t tx = rand() % c_maxpps;
update_attr(it, PACKETS, rx, tx, RX_PROVIDED | TX_PROVIDED);
update_attr(it, BYTES, rx * (rand() % c_mtu),
tx * (rand() % c_mtu), RX_PROVIDED | TX_PROVIDED);
} else {
update_attr(it, PACKETS, c_rx_p_inc, c_tx_p_inc,
RX_PROVIDED | TX_PROVIDED);
update_attr(it, BYTES, c_rx_b_inc, c_tx_b_inc,
RX_PROVIDED | TX_PROVIDED);
}
notify_update(it, NULL);
increase_lifetime(it, 1);
}
}
static void print_help(void)
{
printf(
"dummy - Statistic generator module (dummy)\n" \
"\n" \
" Basic statistic generator for testing purposes. Can produce a\n" \
" constant or random statistic flow with configurable parameters.\n" \
" Author: Thomas Graf <tgraf@suug.ch>\n" \
"\n" \
" Options:\n" \
" rxb=NUM RX bytes increment amount (default: 10^9)\n" \
" txb=NUM TX bytes increment amount (default: 8*10^7)\n" \
" rxp=NUM RX packets increment amount (default: 1K)\n" \
" txp=NUM TX packets increment amount (default: 800)\n" \
" num=NUM Number of devices (default: 5)\n" \
" randomize Randomize counters (default: off)\n" \
" seed=NUM Seed for randomizer (default: time(0))\n" \
" mtu=NUM Maximal Transmission Unit (default: 1540)\n" \
" maxpps=NUM Upper limit for packets per second (default: 100K)\n" \
"\n" \
" Randomizer:\n" \
" RX-packets := Rand() %% maxpps\n" \
" TX-packets := Rand() %% maxpps\n" \
" RX-bytes := RX-packets * (Rand() %% mtu)\n" \
" TX-bytes := TX-packets * (Rand() %% mtu)\n");
}
static void dummy_set_opts(tv_t *attrs)
{
while (attrs) {
if (!strcasecmp(attrs->type, "rxb") && attrs->value)
c_rx_b_inc = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "txb") && attrs->value)
c_tx_b_inc = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "rxp") && attrs->value)
c_rx_p_inc = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "txp") && attrs->value)
c_tx_p_inc = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "num") && attrs->value)
c_numdev = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "randomize")) {
c_randomize = 1;
srand(time(0));
} else if (!strcasecmp(attrs->type, "seed") && attrs->value)
srand(strtol(attrs->value, NULL, 0));
else if (!strcasecmp(attrs->type, "mtu") && attrs->value)
c_mtu = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "maxpps") && attrs->value)
c_maxpps = strtol(attrs->value, NULL, 0);
else if (!strcasecmp(attrs->type, "help")) {
print_help();
exit(0);
}
attrs = attrs->next;
}
}
static int dummy_probe(void)
{
return 1;
}
static struct input_module dummy_ops = {
.im_name = "dummy",
.im_read = dummy_read,
.im_set_opts = dummy_set_opts,
.im_probe = dummy_probe,
.im_no_default = 1,
};
static void __init dummy_init(void)
{
register_input_module(&dummy_ops);
}
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