mirror of https://github.com/aredn/aredn.git
205 lines
4.8 KiB
Plaintext
205 lines
4.8 KiB
Plaintext
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#!/usr/bin/perl
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$debug = 0;
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use perlfunc;
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# collect some variables
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$node = nvram_get("node");
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$node = "NOCALL" unless $node;
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read_query_string();
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system "mkdir -p /tmp/web";
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system "rm -f /tmp/web/siglevel" if $parms{start};
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# get the current levels
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($s, $n) = get_wifi_signal("wl0");
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if($s eq "N/A") { $s = $n = "---" }
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# load the previous levels
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if(open(FILE, "/tmp/web/siglevel"))
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{
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chomp($count = <FILE>);
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chomp($last_start = <FILE>);
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chomp($lineS = <FILE>);
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chomp($lineN = <FILE>);
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chomp($lineR = <FILE>);
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close(FILE);
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@listS = split / /, $lineS;
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@listN = split / /, $lineN;
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@listR = split / /, $lineR;
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push @listS, $s;
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push @listN, $n;
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if($count == 20)
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{
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shift @listS;
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shift @listN;
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shift @listR;
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}
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else
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{
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++$count;
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}
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}
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else
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{
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$count = 1;
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@listS = ($s);
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@listN = ($n);
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$last_start = 0;
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}
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# gather statistics
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$good = 0;
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$minS = $minN = $minR = 1000;
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$avgS = $avgN = 0;
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$maxS = $maxN = $maxR = -1000;
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for($i = 0; $i < $count; $i++)
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{
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$s = $listS[$i];
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next if $s eq "---";
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++$good;
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$n = $listN[$i];
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$r = $s - $n;
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$minS = $s if $s < $minS;
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$minN = $n if $n < $minN;
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$minR = $r if $r < $minR;
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$maxS = $s if $s > $maxS;
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$maxN = $n if $n > $maxN;
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$maxR = $r if $r > $maxR;
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$avgS += $s;
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$avgN += $n;
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}
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if($good)
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{
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$s = $listS[-1];
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$n = $listN[-1];
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$r = ($s eq "---") ? "---" : $s - $n;
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$avgS = int($avgS / $good);
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$avgN = int($avgN / $good);
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$avgR = $avgS - $avgN;
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push @listR, $avgR;
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# make the graph
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if($s eq "---" or ($r >= $last_start and $r <= $last_start + 30))
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{
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$start = $last_start;
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}
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else
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{
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$start = 10*int(($maxR + 9)/10) - 30;
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while($r < $start) { $start -= 10 }
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$start = 0 if $start < 0;
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}
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for($i = $count - 1; $i >= 0; $i--)
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{
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$str = " " x 30;
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if($listS[$i] ne "---")
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{
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$r2 = $listS[$i] - $listN[$i] - $start;
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if($r2 > 30)
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{
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$r2 = 29;
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substr($str, 30, 1) = ">";
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}
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substr($str, 0, $r2 + 1) = "*" x ($r2 + 1) if $r2 >= 0;
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substr($str, 0, 1) = "<" if $r2 < 0;
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if($listR[$i] >= $start and $listR[$i] <= $start + 30)
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{
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substr($str, $listR[$i] - $start, 1) = "|";
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}
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}
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push @graph, " $str\n";
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}
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substr($graph[0], 0, 2) = ">>";
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}
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else
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{
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$s = $n = $r = "---";
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$maxS = $maxN = $maxR = "---";
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$avgS = $avgN = $avgR = "---";
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$minS = $minN = $minR = "---";
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push @listR, "---";
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$start = 0;
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}
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# store the level history
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open(FILE, ">/tmp/web/siglevel");
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print FILE "$count\n$start\n@listS\n@listN\n@listR\n";
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close(FILE);
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# generate the page
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http_header();
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html_header("$node signal strength", 0);
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print "<meta http-equiv='refresh' content='2;url=/cgi-bin/signal'>\n";
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print "</head>\n";
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print "<body><form method=post action=/cgi-bin/status enctype='multipart/form-data'>\n";
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print "<center>\n";
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print "<h1>$node signal strength</h1><hr>\n";
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print "<table cellpadding=5><tr>\n";
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print "<td align=center><button type=button onClick='window.location=\"status\"' title='Return to the status page'>Quit</button></td>\n";
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print "<td><font size=6><b>Signal</b></font></td><td> </td>\n";
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print "<td><font size=6><b>Noise</b></font></td><td> </td>\n";
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print "<td><font size=6><b>Ratio</b></font></td><td> </td>\n";
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# SNR meter
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print "<td rowspan=5 valign=top><b><pre>";
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printf "%4d%10d%10d%10d\n", $start, $start + 10, $start + 20, $start + 30;
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print " | . . . . | . . . . | . . . . |\n";
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print @graph;
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print "</pre></b></td>";
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print "</tr><tr>\n";
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print "<td align=center><font size=6>now</font></td>\n";
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print "<td align=center><font size=7><b>$s</b></font></td><td> </td>\n";
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print "<td align=center><font size=7><b>$n</b></font></td><td> </td>\n";
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print "<td align=center><font size=7><b>$r</b></font></td><td> </td>\n";
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print "</tr><tr>\n";
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print "<td align=center><font size=6>average</font></td>\n";
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print "<td align=center><font size=7><b>$avgS</b></font></td><td> </td>\n";
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print "<td align=center><font size=7><b>$avgN</b></font></td><td> </td>\n";
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print "<td align=center><font size=7><b>$avgR</b></font></td><td> </td>\n";
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print "<tr><td align=center><font size=5><nobr>n = $good/$count</nobr></font></td>\n";
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print "<td align=center><font size=5><nobr>max: $maxS</nobr><br><nobr>min: $minS</nobr></font></td>";
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print "<td> </td>";
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print "<td align=center><font size=5><nobr>max: $maxN</nobr><br><nobr>min: $minN</nobr></font></td>";
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print "<td> </td>";
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print "<td align=center><font size=5><nobr>max: $maxR</nobr><br><nobr>min: $minR</nobr></font></td>\n";
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print "<td> </td>";
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print "</tr><tr><td height=150 colspan=7> </td>";
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print "</tr></table>\n";
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print "</center>\n";
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print "</form>\n";
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show_debug_info();
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show_parse_errors();
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print "</body>\n";
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print "</html>\n";
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