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/* $Id: stats.c,v 1.16 2004-04-27 18:48:53 rjkaes Exp $
*
* This module handles the statistics for tinyproxy. There are only two
* public API functions. The reason for the functions, rather than just a
* external structure is that tinyproxy is now multi-threaded and we can
* not allow more than one child to access the statistics at the same
* time. This is prevented by a mutex. If there is a need for more
* statistics in the future, just add to the structure, enum (in the header),
* and the switch statement in update_stats().
*
* Copyright (C) 2000 Robert James Kaes (rjkaes@flarenet.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, 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.
*/
#include "tinyproxy.h"
#include "log.h"
#include "heap.h"
#include "htmlerror.h"
#include "stats.h"
#include "utils.h"
struct stat_s {
unsigned long int num_reqs;
unsigned long int num_badcons;
unsigned long int num_open;
unsigned long int num_refused;
unsigned long int num_denied;
};
static struct stat_s *stats;
/*
* Initialize the statistics information to zero.
*/
void
init_stats(void)
{
stats = malloc_shared_memory(sizeof(struct stat_s));
if (stats == MAP_FAILED)
return;
memset(stats, 0, sizeof(struct stat_s));
}
/*
* Display the statics of the tinyproxy server.
*/
int
showstats(struct conn_s *connptr)
{
static char *msg =
"<html><head><title>%s (%s) stats</title></head>\r\n"
"<body>\r\n"
"<center><h2>%s (%s) run-time statistics</h2></center><hr>\r\n"
"<blockquote>\r\n"
"Number of open connections: %lu<br>\r\n"
"Number of requests: %lu<br>\r\n"
"Number of bad connections: %lu<br>\r\n"
"Number of denied connections: %lu<br>\r\n"
"Number of refused connections due to high load: %lu\r\n"
"</blockquote>\r\n</body></html>\r\n";
char *message_buffer;
char opens[16], reqs[16], badconns[16], denied[16], refused[16];
FILE *statfile;
snprintf(opens, sizeof(opens), "%lu", stats->num_open);
snprintf(reqs, sizeof(reqs), "%lu", stats->num_reqs);
snprintf(badconns, sizeof(badconns), "%lu", stats->num_badcons);
snprintf(denied, sizeof(denied), "%lu", stats->num_denied);
snprintf(refused, sizeof(refused), "%lu", stats->num_refused);
if (!config.statpage || (!(statfile = fopen(config.statpage, "r")))) {
message_buffer = safemalloc(MAXBUFFSIZE);
if (!message_buffer)
return -1;
snprintf(message_buffer, MAXBUFFSIZE, msg,
PACKAGE, VERSION, PACKAGE, VERSION,
stats->num_open,
stats->num_reqs,
stats->num_badcons, stats->num_denied, stats->num_refused);
if (send_http_message(connptr, 200, "OK", message_buffer) < 0) {
safefree(message_buffer);
return -1;
}
safefree(message_buffer);
return 0;
}
add_error_variable(connptr, "opens", opens);
add_error_variable(connptr, "reqs", reqs);
add_error_variable(connptr, "badconns", badconns);
add_error_variable(connptr, "denied", denied);
add_error_variable(connptr, "refused", refused);
add_standard_vars(connptr);
send_http_headers(connptr, 200, "Statistic requested");
send_html_file(statfile, connptr);
fclose(statfile);
return 0;
}
/*
* Update the value of the statistics. The update_level is defined in
* stats.h
*/
int
update_stats(status_t update_level)
{
switch (update_level) {
case STAT_BADCONN:
++stats->num_badcons;
break;
case STAT_OPEN:
++stats->num_open;
++stats->num_reqs;
break;
case STAT_CLOSE:
--stats->num_open;
break;
case STAT_REFUSE:
++stats->num_refused;
break;
case STAT_DENIED:
++stats->num_denied;
break;
default:
return -1;
}
return 0;
}
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