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/* Copyright 2004 Roger Dingledine */
/* See LICENSE for licensing information */
/* $Id$ */
#include "or.h"
typedef struct link_history_t {
time_t since;
unsigned long n_extend_ok;
unsigned long n_extend_fail;
} link_history_t;
typedef struct or_history_t {
time_t since;
unsigned long n_conn_ok;
unsigned long n_conn_fail;
unsigned long uptime;
unsigned long downtime;
time_t up_since;
time_t down_since;
strmap_t *link_history_map;
} or_history_t;
static strmap_t *history_map;
/* Return the or_history_t for the named OR, creating it if necessary.
*/
static or_history_t *get_or_history(const char* nickname)
{
or_history_t *hist;
hist = (or_history_t*) strmap_get(history_map, nickname);
if (!hist) {
hist = tor_malloc_zero(sizeof(or_history_t));
hist->link_history_map = strmap_new();
hist->since = time(NULL);
strmap_set(history_map, nickname, hist);
}
return hist;
}
/* Return the link_history_t for the link from the first named OR to
* the second, creating it if necessary.
*/
static link_history_t *get_link_history(const char *from_name,
const char *to_name)
{
or_history_t *orhist;
link_history_t *lhist;
orhist = get_or_history(from_name);
lhist = (link_history_t*) strmap_get(orhist->link_history_map, to_name);
if (!lhist) {
lhist = tor_malloc_zero(sizeof(link_history_t));
lhist->since = time(NULL);
strmap_set(orhist->link_history_map, to_name, lhist);
}
return lhist;
}
/* Update an or_history_t object so that its uptime/downtime count is
* up-to-date.
*/
static void update_or_history(or_history_t *hist, time_t when)
{
assert(hist);
if (hist->up_since) {
assert(!hist->down_since);
hist->uptime += (when - hist->up_since);
hist->up_since = when;
} else if (hist->down_since) {
hist->downtime += (when - hist->down_since);
hist->down_since = when;
}
}
/* Initialize the static data structures for tracking history.
*/
void rep_hist_init(void)
{
history_map = strmap_new();
}
/* Remember that an attempt to connect to the OR 'nickname' failed at
* 'when'.
*/
void rep_hist_note_connect_failed(const char* nickname, time_t when)
{
or_history_t *hist;
hist = get_or_history(nickname);
++hist->n_conn_fail;
if (hist->up_since) {
hist->uptime += (when - hist->up_since);
hist->up_since = 0;
}
if (!hist->down_since)
hist->down_since = when;
}
/* Remember that an attempt to connect to the OR 'nickname' succeeded
* at 'when'.
*/
void rep_hist_note_connect_succeeded(const char* nickname, time_t when)
{
or_history_t *hist;
hist = get_or_history(nickname);
++hist->n_conn_ok;
if (hist->down_since) {
hist->downtime += (when - hist->down_since);
hist->down_since = 0;
}
if (!hist->up_since)
hist->up_since = when;
}
/* Remember that we intentionally closed our connection to the OR
* 'nickname' at 'when'.
*/
void rep_hist_note_disconnect(const char* nickname, time_t when)
{
or_history_t *hist;
hist = get_or_history(nickname);
++hist->n_conn_ok;
if (hist->up_since) {
hist->uptime += (when - hist->up_since);
hist->up_since = 0;
}
}
/* Remember that our connection to the OR 'nickname' had an error and
* stopped working at 'when'.
*/
void rep_hist_note_connection_died(const char* nickname, time_t when)
{
or_history_t *hist;
hist = get_or_history(nickname);
if (hist->up_since) {
hist->uptime += (when - hist->up_since);
hist->up_since = 0;
}
if (!hist->down_since)
hist->down_since = when;
}
/* Remember that we successfully extended from the OR 'from_name' to
* the OR 'to_name'.
*/
void rep_hist_note_extend_succeeded(const char *from_name,
const char *to_name)
{
link_history_t *hist;
/* log_fn(LOG_WARN, "EXTEND SUCCEEDED: %s->%s",from_name,to_name); */
hist = get_link_history(from_name, to_name);
++hist->n_extend_ok;
}
/* Remember that we tried to extend from the OR 'from_name' to the OR
* 'to_name', but failed.
*/
void rep_hist_note_extend_failed(const char *from_name, const char *to_name)
{
link_history_t *hist;
/* log_fn(LOG_WARN, "EXTEND FAILED: %s->%s",from_name,to_name); */
hist = get_link_history(from_name, to_name);
++hist->n_extend_fail;
}
/* Log all the reliability data we have rememberred, with the chosen
* severity.
*/
void rep_hist_dump_stats(time_t now, int severity)
{
strmap_iter_t *lhist_it;
strmap_iter_t *orhist_it;
const char *name1, *name2;
or_history_t *or_history;
link_history_t *link_history;
double uptime;
char buffer[2048];
int len;
unsigned long upt, downt;
log(severity, "--------------- Dumping history information:");
for (orhist_it = strmap_iter_init(history_map); !strmap_iter_done(orhist_it);
orhist_it = strmap_iter_next(history_map,orhist_it)) {
strmap_iter_get(orhist_it, &name1, (void**)&or_history);
update_or_history(or_history, now);
upt = or_history->uptime;
downt = or_history->downtime;
if (upt+downt) {
uptime = ((double)upt) / (upt+downt);
} else {
uptime=1.0;
}
log(severity,
"OR %s: %ld/%ld good connections; uptime %ld/%ld sec (%.2f%%)",
name1,
or_history->n_conn_ok, or_history->n_conn_fail+or_history->n_conn_ok,
upt, upt+downt, uptime*100.0);
strcpy(buffer, " Good extend attempts: ");
len = strlen(buffer);
for (lhist_it = strmap_iter_init(or_history->link_history_map);
!strmap_iter_done(lhist_it);
lhist_it = strmap_iter_next(or_history->link_history_map, lhist_it)) {
strmap_iter_get(lhist_it, &name2, (void**)&link_history);
len += snprintf(buffer+len, 2048-len, "%s(%ld/%ld); ", name2,
link_history->n_extend_ok,
link_history->n_extend_ok+link_history->n_extend_fail);
if (len >= 2048) {
buffer[2047]='\0';
break;
}
}
log(severity, buffer);
}
}
/*
Local Variables:
mode:c
indent-tabs-mode:nil
c-basic-offset:2
End:
*/
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