2001-05-27 10:26:53 +08:00
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/* $Id: stats.c,v 1.4 2001-05-27 02:26:53 rjkaes Exp $
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2000-09-12 08:06:09 +08:00
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*
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* This module handles the statistics for tinyproxy. There are only two
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* public API functions. The reason for the functions, rather than just a
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* external structure is that tinyproxy is now multi-threaded and we can
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* not allow more than one thread to access the statistics at the same
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* time. This is prevented by a mutex. If there is a need for more
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* statistics in the future, just add to the structure, enum (in the header),
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* and the switch statement in update_stats().
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*
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* Copyright (C) 2000 Robert James Kaes (rjkaes@flarenet.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include "tinyproxy.h"
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#include "log.h"
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#include "stats.h"
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struct stat_s {
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unsigned long int num_reqs;
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unsigned long int num_badcons;
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unsigned long int num_open;
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unsigned long int num_refused;
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unsigned long int num_denied;
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};
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static struct stat_s stats;
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/*
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* Locking when we're accessing the statistics, since I don't want multiple
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* threads changing the information at the same time.
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*/
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pthread_mutex_t stats_mutex = PTHREAD_MUTEX_INITIALIZER;
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#define LOCK() pthread_mutex_lock(&stats_mutex)
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#define UNLOCK() pthread_mutex_unlock(&stats_mutex)
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/*
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* Initialise the statistics information to zero.
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*/
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void init_stats(void)
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{
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LOCK();
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memset(&stats, 0, sizeof(stats));
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UNLOCK();
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}
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/*
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* Display the statics of the tinyproxy server.
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*/
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int showstats(struct conn_s *connptr)
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{
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static char *msg = "HTTP/1.0 200 OK\r\n" \
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"Content-type: text/html\r\n\r\n" \
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"<html><head><title>%s (%s) stats</title></head>\r\n" \
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"<body>\r\n" \
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"<center><h2>%s (%s) run-time statistics</h2></center><hr>\r\n" \
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"<blockquote>\r\n" \
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"Number of open connections: %lu<br>\r\n" \
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"Number of requests: %lu<br>\r\n" \
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"Number of bad connections: %lu<br>\r\n" \
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"Number of denied connections: %lu<br>\r\n" \
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"Number of refused connections due to high load: %lu\r\n" \
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"</blockquote>\r\n</body></html>\r\n";
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connptr->output_message = malloc(MAXBUFFSIZE);
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if (!connptr->output_message) {
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2001-05-27 10:26:53 +08:00
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log_message(LOG_CRIT, "Out of memory!");
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2000-09-12 08:06:09 +08:00
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return -1;
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}
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LOCK();
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2001-01-16 01:11:57 +08:00
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snprintf(connptr->output_message, MAXBUFFSIZE, msg,
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2000-09-12 08:06:09 +08:00
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PACKAGE, VERSION, PACKAGE, VERSION,
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stats.num_open,
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stats.num_reqs,
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stats.num_badcons,
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stats.num_denied,
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stats.num_refused);
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UNLOCK();
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return 0;
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}
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/*
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* Update the value of the statistics. The update_level is defined in
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* stats.h
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*/
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int update_stats(status_t update_level)
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{
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LOCK();
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switch(update_level) {
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case STAT_BADCONN:
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stats.num_badcons++;
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break;
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case STAT_OPEN:
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stats.num_open++;
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stats.num_reqs++;
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break;
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case STAT_CLOSE:
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stats.num_open--;
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break;
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case STAT_REFUSE:
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stats.num_refused++;
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break;
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case STAT_DENIED:
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stats.num_denied++;
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break;
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default:
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UNLOCK();
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return -1;
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}
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UNLOCK();
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return 0;
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}
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