2004-04-28 02:48:53 +08:00
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/* $Id: stats.c,v 1.16 2004-04-27 18:48:53 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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2002-05-27 02:53:14 +08:00
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* not allow more than one child to access the statistics at the same
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2000-09-12 08:06:09 +08:00
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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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2002-05-24 02:20:27 +08:00
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#include "heap.h"
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2003-03-14 05:31:03 +08:00
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#include "htmlerror.h"
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2000-09-12 08:06:09 +08:00
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#include "stats.h"
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2001-09-09 02:58:37 +08:00
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#include "utils.h"
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2000-09-12 08:06:09 +08:00
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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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2002-05-27 02:53:14 +08:00
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static struct stat_s *stats;
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2000-09-12 08:06:09 +08:00
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/*
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2002-05-24 12:45:32 +08:00
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* Initialize the statistics information to zero.
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2000-09-12 08:06:09 +08:00
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*/
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2001-11-22 08:31:10 +08:00
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void
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init_stats(void)
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2000-09-12 08:06:09 +08:00
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{
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2004-02-14 05:27:42 +08:00
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stats = malloc_shared_memory(sizeof(struct stat_s));
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2002-05-30 04:49:55 +08:00
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if (stats == MAP_FAILED)
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2002-05-27 02:53:14 +08:00
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return;
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2004-04-28 02:48:53 +08:00
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memset(stats, 0, sizeof(struct stat_s));
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2000-09-12 08:06:09 +08:00
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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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2001-11-22 08:31:10 +08:00
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int
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showstats(struct conn_s *connptr)
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2000-09-12 08:06:09 +08:00
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{
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static char *msg =
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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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2000-09-12 08:06:09 +08:00
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"</blockquote>\r\n</body></html>\r\n";
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2001-09-16 05:27:58 +08:00
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char *message_buffer;
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2003-03-14 05:31:03 +08:00
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char opens[16], reqs[16], badconns[16], denied[16], refused[16];
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FILE *statfile;
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2001-09-16 05:27:58 +08:00
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2003-03-14 05:31:03 +08:00
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snprintf(opens, sizeof(opens), "%lu", stats->num_open);
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snprintf(reqs, sizeof(reqs), "%lu", stats->num_reqs);
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snprintf(badconns, sizeof(badconns), "%lu", stats->num_badcons);
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snprintf(denied, sizeof(denied), "%lu", stats->num_denied);
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snprintf(refused, sizeof(refused), "%lu", stats->num_refused);
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if (!config.statpage || (!(statfile = fopen(config.statpage, "r")))) {
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2004-02-14 05:27:42 +08:00
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message_buffer = safemalloc(MAXBUFFSIZE);
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2003-03-14 05:31:03 +08:00
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if (!message_buffer)
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return -1;
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snprintf(message_buffer, MAXBUFFSIZE, msg,
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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, stats->num_denied, stats->num_refused);
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2000-09-12 08:06:09 +08:00
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2003-03-14 05:31:03 +08:00
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if (send_http_message(connptr, 200, "OK", message_buffer) < 0) {
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safefree(message_buffer);
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return -1;
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}
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2000-09-12 08:06:09 +08:00
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2001-09-16 05:27:58 +08:00
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safefree(message_buffer);
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2003-03-14 05:31:03 +08:00
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return 0;
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2001-09-16 05:27:58 +08:00
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}
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2003-03-14 05:31:03 +08:00
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add_error_variable(connptr, "opens", opens);
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add_error_variable(connptr, "reqs", reqs);
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add_error_variable(connptr, "badconns", badconns);
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add_error_variable(connptr, "denied", denied);
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add_error_variable(connptr, "refused", refused);
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add_standard_vars(connptr);
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send_http_headers(connptr, 200, "Statistic requested");
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send_html_file(statfile, connptr);
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fclose(statfile);
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2000-09-12 08:06:09 +08:00
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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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2001-11-22 08:31:10 +08:00
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int
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update_stats(status_t update_level)
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2000-09-12 08:06:09 +08:00
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{
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2001-11-22 08:31:10 +08:00
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switch (update_level) {
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2000-09-12 08:06:09 +08:00
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case STAT_BADCONN:
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2002-05-27 02:53:14 +08:00
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++stats->num_badcons;
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2000-09-12 08:06:09 +08:00
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break;
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case STAT_OPEN:
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2002-05-27 02:53:14 +08:00
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++stats->num_open;
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++stats->num_reqs;
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2000-09-12 08:06:09 +08:00
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break;
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case STAT_CLOSE:
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2002-05-27 02:53:14 +08:00
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--stats->num_open;
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2000-09-12 08:06:09 +08:00
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break;
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case STAT_REFUSE:
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2002-05-27 02:53:14 +08:00
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++stats->num_refused;
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2000-09-12 08:06:09 +08:00
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break;
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case STAT_DENIED:
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2002-05-27 02:53:14 +08:00
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++stats->num_denied;
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2000-09-12 08:06:09 +08:00
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break;
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default:
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return -1;
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}
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return 0;
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}
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