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boinc/client/net_stats.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
// NET_STATS estimates average network throughput,
// i.e. the average total throughput in both the up and down directions.
//
// NET_STATUS keeps track of whether we have a physical connection,
// and whether we need one
#include "cpp.h"
#ifdef _WIN32
#include "boinc_win.h"
#else
#include "config.h"
#include <cstring>
#include <cmath>
#endif
#include "parse.h"
#include "time.h"
#include "str_util.h"
#include "error_numbers.h"
#include "util.h"
#include "filesys.h"
#include "client_msgs.h"
#include "client_state.h"
#include "file_names.h"
#include "cs_proxy.h"
#include "net_stats.h"
#define NET_RATE_HALF_LIFE (7*86400)
DAILY_XFER_HISTORY daily_xfer_history;
NET_STATUS net_status;
NET_STATS::NET_STATS() {
memset(&up, 0, sizeof(up));
memset(&down, 0, sizeof(down));
}
// called after file xfer to update rates
//
void NET_INFO::update(double nbytes, double dt) {
if (nbytes == 0 || dt==0) return;
double bytes_sec = nbytes/dt;
if (max_rate == 0) {
max_rate = bytes_sec; // first time
} else {
// somewhat arbitrary weighting formula
//
double w = log(nbytes)/500;
if (w>1) w = 1;
max_rate = w*bytes_sec + (1-w)*max_rate;
}
double start_time = gstate.now - dt;
update_average(
gstate.now,
start_time,
nbytes,
NET_RATE_HALF_LIFE,
avg_rate,
avg_time
);
}
int NET_STATS::write(MIOFILE& out) {
out.printf(
"<net_stats>\n"
" <bwup>%f</bwup>\n"
" <avg_up>%f</avg_up>\n"
" <avg_time_up>%f</avg_time_up>\n"
" <bwdown>%f</bwdown>\n"
" <avg_down>%f</avg_down>\n"
" <avg_time_down>%f</avg_time_down>\n"
"</net_stats>\n",
up.max_rate,
up.avg_rate,
up.avg_time,
down.max_rate,
down.avg_rate,
down.avg_time
);
return 0;
}
int NET_STATS::parse(MIOFILE& in) {
char buf[256];
memset(this, 0, sizeof(NET_STATS));
while (in.fgets(buf, 256)) {
if (match_tag(buf, "</net_stats>")) return 0;
if (parse_double(buf, "<bwup>", up.max_rate)) continue;
if (parse_double(buf, "<avg_up>", up.avg_rate)) continue;
if (parse_double(buf, "<avg_time_up>", up.avg_time)) continue;
if (parse_double(buf, "<bwdown>", down.max_rate)) continue;
if (parse_double(buf, "<avg_down>", down.avg_rate)) continue;
if (parse_double(buf, "<avg_time_down>", down.avg_time)) continue;
if (log_flags.unparsed_xml) {
msg_printf(NULL, MSG_INFO,
"[unparsed_xml] Unrecognized network statistics line: %s", buf
);
}
}
return ERR_XML_PARSE;
}
// Return:
// ONLINE if we have network connections open
// WANT_CONNECTION if we need a physical connection
// WANT_DISCONNECT if we don't have any connections, and don't need any
// LOOKUP_PENDING if a website lookup is pending (try again later)
//
// There's a 10-second slop factor;
// if we've done network comm in the last 10 seconds,
// we act as if we're doing it now.
// (so that polling mechanisms have a chance to start other xfers,
// in the case of a modem connection waiting to be closed by the mgr)
//
int NET_STATUS::network_status() {
int retval;
if (gstate.http_ops->nops()) {
last_comm_time = gstate.now;
}
if (need_to_contact_reference_site) {
retval = NETWORK_STATUS_LOOKUP_PENDING;
} else if (gstate.lookup_website_op.error_num == ERR_IN_PROGRESS) {
retval = NETWORK_STATUS_LOOKUP_PENDING;
} else if (gstate.now - last_comm_time < 10) {
retval = NETWORK_STATUS_ONLINE;
} else if (need_physical_connection) {
retval = NETWORK_STATUS_WANT_CONNECTION;
} else if (gstate.active_tasks.want_network()) {
retval = NETWORK_STATUS_WANT_CONNECTION;
} else {
have_sporadic_connection = false;
retval = NETWORK_STATUS_WANT_DISCONNECT;
}
if (log_flags.network_status_debug) {
msg_printf(NULL, MSG_INFO, "[network_status] status: %s", network_status_string(retval));
}
return retval;
}
// There's now a network connection, after some period of disconnection.
// Do all communication that we can.
//
void NET_STATUS::network_available() {
unsigned int i;
have_sporadic_connection = true;
for (i=0; i<gstate.pers_file_xfers->pers_file_xfers.size(); i++) {
PERS_FILE_XFER* pfx = gstate.pers_file_xfers->pers_file_xfers[i];
pfx->next_request_time = 0;
}
for (i=0; i<gstate.projects.size(); i++) {
PROJECT* p = gstate.projects[i];
p->min_rpc_time = 0;
}
// tell active tasks that network is available (for Folding@home)
//
gstate.active_tasks.network_available();
}
// An HTTP operation failed;
// it could be because there's no physical network connection.
// Find out for sure by trying to contact a reference site
//
void NET_STATUS::got_http_error() {
// Cause a round of proxy detections to occur
if (working_proxy_info.autodetect_proxy_supported) {
working_proxy_info.need_autodetect_proxy_settings = true;
working_proxy_info.have_autodetect_proxy_settings = false;
}
if (gstate.lookup_website_op.error_num == ERR_IN_PROGRESS) return;
// Don't spam the reference site when a project is down
if (need_physical_connection) return;
if (config.dont_contact_ref_site) return;
if (log_flags.network_status_debug) {
msg_printf(0, MSG_INFO,
"[network_status] got HTTP error - checking ref site"
);
}
need_to_contact_reference_site = true;
show_ref_message = true;
}
void NET_STATUS::contact_reference_site() {
if (log_flags.network_status_debug) {
msg_printf(0, MSG_INFO,
"[network_status] need_phys_conn %d; trying %s",
need_physical_connection, config.network_test_url.c_str()
);
}
gstate.lookup_website_op.do_rpc(config.network_test_url);
need_to_contact_reference_site = false;
}
static void show_fail_msg() {
msg_printf(0, MSG_USER_ALERT, NEED_NETWORK_MSG);
}
int LOOKUP_WEBSITE_OP::do_rpc(string& url) {
int retval;
if (net_status.show_ref_message) {
msg_printf(0, MSG_INFO,
"Project communication failed: attempting access to reference site"
);
}
retval = gui_http->do_rpc(
this, (char*)url.c_str(), LOOKUP_WEBSITE_FILENAME, true
);
if (retval) {
error_num = retval;
net_status.need_physical_connection = true;
net_status.last_comm_time = 0;
show_fail_msg();
} else {
error_num = ERR_IN_PROGRESS;
}
return retval;
}
void LOOKUP_WEBSITE_OP::handle_reply(int http_op_retval) {
error_num = http_op_retval;
// if we couldn't contact a reference web site,
// we can assume there's a problem that requires user attention
// (usually no physical network connection).
// Set a flag that will signal the Manager to that effect
//
if (http_op_retval) {
net_status.need_physical_connection = true;
net_status.last_comm_time = 0;
show_fail_msg();
} else {
if (net_status.show_ref_message) {
msg_printf(0, MSG_INFO,
"Internet access OK - project servers may be temporarily down."
);
}
}
}
void NET_STATUS::poll() {
// for 30 seconds after wakeup, the network system (DNS etc.)
// may still be coming up, so defer the reference site check;
// otherwise might show spurious "need connection" message
//
if (gstate.now < gstate.last_wakeup_time + 30) return;
// wait until after a round of automatic proxy detection
// before attempting to contact the reference site
//
if (working_proxy_info.autodetect_proxy_supported &&
working_proxy_info.need_autodetect_proxy_settings &&
!working_proxy_info.have_autodetect_proxy_settings) return;
if (net_status.need_to_contact_reference_site && !gstate.gui_http.is_busy()) {
net_status.contact_reference_site();
}
}
int DAILY_XFER::parse(XML_PARSER& xp) {
char tag[1024];
bool is_tag;
while (!xp.get(tag, sizeof(tag), is_tag)) {
if (!strcmp(tag, "/dx")) return 0;
if (xp.parse_int(tag, "when", when)) continue;
if (xp.parse_double(tag, "up", up)) continue;
if (xp.parse_double(tag, "down", down)) continue;
}
return ERR_XML_PARSE;
}
void DAILY_XFER::write(FILE* f) {
fprintf(f,
"<dx>\n"
" <when>%d</when>\n"
" <up>%f</up>\n"
" <down>%f</down>\n"
"</dx>\n",
when, up, down
);
}
inline int current_day() {
return (int)((gstate.now + gstate.host_info.timezone)/86400);
}
DAILY_XFER* DAILY_XFER_HISTORY::today() {
int d = current_day();
for (unsigned int i=0; i<daily_xfers.size(); i++) {
DAILY_XFER& dx = daily_xfers[i];
if (dx.when == d) {
return &dx;
}
}
DAILY_XFER dx;
dx.when = d;
daily_xfers.push_front(dx);
return &(daily_xfers.front());
}
void DAILY_XFER_HISTORY::add(size_t x, bool upload) {
DAILY_XFER* dxp = today();
if (upload) {
dxp->up += x;
} else {
dxp->down += x;
}
dirty = true;
}
void DAILY_XFER_HISTORY::init() {
FILE* f = fopen(DAILY_XFER_HISTORY_FILENAME, "r");
if (!f) return;
MIOFILE mf;
XML_PARSER xp(&mf);
mf.init_file(f);
bool is_tag;
char tag[256];
int d = current_day();
if (!xp.parse_start("daily_xfers")) {
fclose(f);
return;
}
while (!xp.get(tag, sizeof(tag), is_tag)) {
if (!is_tag) continue;
if (!strcmp(tag, "dx")) {
DAILY_XFER dx;
int retval = dx.parse(xp);
if (!retval && d - dx.when < 365) {
// discard records after a year
daily_xfers.push_back(dx);
}
}
}
fclose(f);
}
void DAILY_XFER_HISTORY::poll() {
static double last_time= 0;
if (!dirty) return;
if (gstate.now - last_time < DAILY_XFER_HISTORY_PERIOD) return;
last_time = gstate.now;
write_state();
}
void DAILY_XFER_HISTORY::write_state() {
FILE* f = fopen(TEMP_FILE_NAME, "w");
if (!f) return;
fprintf(f, "<daily_xfers>\n");
for (unsigned int i=0; i<daily_xfers.size(); i++) {
DAILY_XFER& dx = daily_xfers[i];
dx.write(f);
}
int n = fprintf(f, "</daily_xfers>\n");
fclose(f);
if (n > 0) {
int retval = boinc_rename(TEMP_FILE_NAME, DAILY_XFER_HISTORY_FILENAME);
if (!retval) {
dirty = false;
}
}
}
void DAILY_XFER_HISTORY::totals(int ndays, double& up, double& down) {
int d = (current_day() - ndays);
up = down = 0;
for (unsigned int i=0; i<daily_xfers.size(); i++) {
DAILY_XFER& dx = daily_xfers[i];
if (dx.when <= d) break;
up += dx.up;
down += dx.down;
}
}
void DAILY_XFER_HISTORY::write_scheduler_request(MIOFILE& mf, int ndays) {
double up, down;
totals(ndays, up, down);
mf.printf(
"<daily_xfer_history>\n"
" <ndays>%d</ndays>\n"
" <up>%f</up>\n"
" <down>%f</down>\n"
"</daily_xfer_history>\n",
ndays, up, down
);
}
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