PHPでtracerouteプログラムを作成する
http://www.adayinthelifeof.nl/2010/07/30/creating-a-traceroute-program-in-php/
サイトがダウンした場合の要点は次のとおりです。
<?php
define ("SOL_IP", 0);
define ("IP_TTL", 2); // On OSX, use '4' instead of '2'.
$dest_url = "www.google.com"; // Fill in your own URL here, or use $argv[1] to fetch from commandline.
$maximum_hops = 30;
$port = 33434; // Standard port that traceroute programs use. Could be anything actually.
// Get IP from URL
$dest_addr = gethostbyname ($dest_url);
print "Tracerouting to destination: $dest_addr\n";
$ttl = 1;
while ($ttl < $maximum_hops) {
// Create ICMP and UDP sockets
$recv_socket = socket_create (AF_INET, SOCK_RAW, getprotobyname ('icmp'));
$send_socket = socket_create (AF_INET, SOCK_DGRAM, getprotobyname ('udp'));
// Set TTL to current lifetime
socket_set_option ($send_socket, SOL_IP, IP_TTL, $ttl);
// Bind receiving ICMP socket to default IP (no port needed since it's ICMP)
socket_bind ($recv_socket, 0, 0);
// Save the current time for roundtrip calculation
$t1 = microtime (true);
// Send a zero sized UDP packet towards the destination
socket_sendto ($send_socket, "", 0, 0, $dest_addr, $port);
// Wait for an event to occur on the socket or timeout after 5 seconds. This will take care of the
// hanging when no data is received (packet is dropped silently for example)
$r = array ($recv_socket);
$w = $e = array ();
socket_select ($r, $w, $e, 5, 0);
// Nothing to read, which means a timeout has occurred.
if (count ($r)) {
// Receive data from socket (and fetch destination address from where this data was found)
socket_recvfrom ($recv_socket, $buf, 512, 0, $recv_addr, $recv_port);
// Calculate the roundtrip time
$roundtrip_time = (microtime(true) - $t1) * 1000;
// No decent address found, display a * instead
if (empty ($recv_addr)) {
$recv_addr = "*";
$recv_name = "*";
} else {
// Otherwise, fetch the hostname for the address found
$recv_name = gethostbyaddr ($recv_addr);
}
// Print statistics
printf ("%3d %-15s %.3f ms %s\n", $ttl, $recv_addr, $roundtrip_time, $recv_name);
} else {
// A timeout has occurred, display a timeout
printf ("%3d (timeout)\n", $ttl);
}
// Close sockets
socket_close ($recv_socket);
socket_close ($send_socket);
// Increase TTL so we can fetch the next hop
$ttl++;
// When we have hit our destination, stop the traceroute
if ($recv_addr == $dest_addr) break;
}
?>
あなたは根である必要があります。これは、Webサーバーから実行する場合はおそらく機能しないことを意味し、コマンドラインから実行する必要があります。
jthijssen@tarabas:~/traceroute$ sudo php traceroute.php
Tracerouting to destination: 199.6.1.164
1 192.168.1.1 0.004 ms 192.168.1.1
2 * 0.005 ms static.kpn.net
3 (timeout)
4 139.156.113.141 0.005 ms nl-asd-dc2-ias-csg01-ge-3-2-0-kpn.net
5 195.190.227.221 0.005 ms asd2-rou-1022.nl.euroringen.net
6 134.222.229.105 0.005 ms asd2-rou-1001.NL.eurorings.net
7 134.222.97.186 0.007 ms kpn-1402.xe-0-0-0.jun1.galilei.network.bit.nl
8 213.154.236.75 0.012 ms 213.154.236.75
9 199.6.1.164 0.012 ms pub3.kernel.org
これはwww.kernel.orgへのtracerouteです。2番目のホップを削除しました(これが私の場所のIPであるため)。3番目のホップがタイムアウトを返しました。おそらく、そこにあるステーションは、使用するためにICMPパケットを返しませんでした。
上記のコードはgithubにあります:https ://github.com/jaytaph/traceroute