diff --git a/.htaccess b/.htaccess
index 8db6885..94bc389 100644
--- a/.htaccess
+++ b/.htaccess
@@ -1,5 +1,10 @@
RewriteEngine On
RewriteBase /
+
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
-RewriteRule ^(.*)$ /index.php?m=$1
+RewriteRule ^([^/]+)/?$ /index.php?m=$1 [L]
+
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^([^/]+)/([^/]+)/?$ index.php?m=$1&t=$2 [L]
diff --git a/README.md b/README.md
index 91db1b7..d0d4b46 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ A simple PHP script to tell a visitor's IP address and more information. This fi
## Plain return
+Example: [/][https://ip.nandus.net]
+
When the script is properly installed, one can visit/curl/wget the website to just receive one's public IP address. This is very useful in combination with other scripts (check out my snap-dyndns packages for example).
```
@@ -13,6 +15,8 @@ max@laptop ~> wget -qO - ip.nandus.net
## Detailed return
+Example: [/myself](https://ip4.nandus.net/myself)
+
Given the location of the script is `ip.example.com`, you can also receive more information about the HTTP headers or the IP's reverse lookup:
```
@@ -30,6 +34,17 @@ HOSTNAME: p5B3E4401.dip0.t-ipconnect.de
IPv4 REVERSE LOOKUP: 91.62.68.1
```
+Additionally you will be given a whois output of your IP.
+
+## Custom DNS and IP lookup
+
+Example DNS: [/dns/example.com](https://ip.nandus.net/dns/example.com)
+Example IP: [/ip/8.8.8.8](https://ip.nandus.net/ip/8.8.8.8)
+
+You can also freely look up any hostname or IP. For domains, this will return a useful list of different DNS records (A, AAAA, NS, MX, TXT, SOA etc).
+
+You will also be given a whois output of the domain or IP.
+
## Ideal domain setup
In order to use IPv4- and IPv6-only domains, you'll have to have control over the DNS nameserver records of your own domain.
diff --git a/index.php b/index.php
index b345778..4a07908 100644
--- a/index.php
+++ b/index.php
@@ -2,16 +2,52 @@
$config = include('config.php');
+$m = isset($_GET['m']) ? $_GET['m'] : false;
+$t = isset($_GET['t']) ? $_GET['t'] : false;
+
// Define method by get parameter
if(empty($_GET)) {
$method = "simple";
+} elseif($m === "dns" && ! empty($t)) {
+ $method = "dns";
+} elseif($m === "ip" && ! empty($t)) {
+ $method = "ip";
+} elseif($m === "myself" && empty($t)) {
+ $method = "myself";
} else {
- $method = $_GET['m'];
+ $method = "unknown";
}
if($method === "simple") { // simple
- echo $_SERVER['REMOTE_ADDR'] . "\n";
-} elseif($method === "detailed" ) { // detailed
+ $ip = $_SERVER['REMOTE_ADDR'];
+ echo $ip . "\n";
+ exit;
+} elseif($method === "myself" ) { // detailed info about own IP
+ $ip = $_SERVER['REMOTE_ADDR'];
+ show_http_headers();
+ show_hostname($ip);
+ show_reverse($hostname);
+ show_whois($ip);
+} elseif($method === "ip" ) { // detailed info an IP
+ $ip = $t;
+ show_hostname($ip);
+ show_reverse($hostname);
+ show_whois($ip);
+} elseif($method === "dns" ) { // detailed info a host name
+ $hostname = $t;
+ show_reverse($hostname);
+ show_dnsrecords($hostname);
+ show_whois($hostname);
+} else if($method === "unknown") { // wrong URL
+ header("HTTP/1.1 301 Moved Permanently");
+ header("Location:/".$config->detailed_uri."");
+ exit;
+}
+footer();
+
+// HTTP HEADERS
+function show_http_headers() {
+ echo "YOUR HTTP HEADERS
";
readheader("REMOTE_ADDR");
readheader("HTTP_X_FORWARDED_FOR");
readheader("HTTP_USER_AGENT");
@@ -21,33 +57,129 @@ if($method === "simple") { // simple
readheader("HTTP_FORWARDED");
readheader("HTTP_HOST");
readheader("HTTP_URI");
- $hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
echo "
";
- echo "HOSTNAME: " . $hostname;
- echo "
";
- echo "IPv4 REVERSE LOOKUP: " . implode(', ', gethostbynamel($hostname));
- echo "
WHOIS:";
- $whois = shell_exec("whois " . $_SERVER['REMOTE_ADDR']);
+}
+// DNS LOOKUP
+function show_hostname($ip) {
+ global $hostname;
+ $hostname = ip2hostname($ip);
+ echo "HOSTNAME: " . link_target($hostname);
+ echo "
\n";
+}
+// REVERSE IP4 LOOKUP
+function show_reverse($hostname) {
+ global $hostname;
+ $ip = hostname2ip($hostname);
+ echo "IPv4 REVERSE LOOKUP: " . link_target($ip);
+ echo "
\n";
+}
+// WHOIS
+function show_whois($target) {
+ echo "WHOIS
\n";
+ if(preg_match('/^(?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63}$/', $target)) {
+ // if domain, skip subdomains
+ preg_match('/[a-zA-Z\d]+\.[a-zA-Z\d]+$/', $target, $m);
+ $target = $m[0];
+ }
+ $whois = shell_exec("whois " . $target );
echo ""; print_r($whois); echo "
";
- echo "
";
-
- echo "
";
- echo 'Plain IP address: IPv4 | IPv6';
- echo "
";
- echo 'Detailed header info: IPv4 | IPv6';
-} else { // wrong URL
- header("HTTP/1.1 301 Moved Permanently");
- header("Location:/".$config->detailed_uri."");
- exit;
+ echo "
\n";
+}
+// DNSRECORDS
+function show_dnsrecords($hostname) {
+ echo "DNS Records
\n";
+ // A
+ $dnsrecords = dnsrecords($hostname, "DNS_A");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ echo link_target($value['ip']) . "
\n";
+ }
+ // AAAA
+ $dnsrecords = dnsrecords($hostname, "DNS_AAAA");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ echo link_target($value['ipv6']) . "
\n";
+ }
+ // MX
+ $dnsrecords = dnsrecords($hostname, "DNS_MX");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ echo link_target($value['target']) . " (" . $value['pri'] . ")
\n";
+ }
+ // NS
+ $dnsrecords = dnsrecords($hostname, "DNS_NS");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ echo link_target($value['target']) . "
\n";
+ }
+ // TXT
+ $dnsrecords = dnsrecords($hostname, "DNS_TXT");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ $i = 0;
+ foreach($value['entries'] as $entry) {
+ if($i !== 0){echo " | ";}
+ echo $entry;
+ }
+ echo "
\n";
+ }
+ // SOA
+ $dnsrecords = dnsrecords($hostname, "DNS_SOA");
+ foreach($dnsrecords as $key=>$value) {
+ echo "" . $value['type'] . ": ";
+ echo "" . $value['mname'] . " (mname), ";
+ echo "" . $value['rname'] . " (rname), ";
+ echo "" . $value['serial'] . " (serial)
\n";
+ }
+
+ // OTHER
+ $dnsrecords = dnsrecords($hostname, "OTHER");
+ if(!empty($dnsrecords)) {
+ echo "Other DNS records:
\n ";
+ echo ""; print_r($dnsrecords); echo "
";
+ echo "
\n";
+ }
+}
+// PRINT FOOTER
+function footer() {
+ global $config;
+ echo "
\n";
+ echo 'Your plain IP address: IPv4 | IPv6';
+ echo "
\n";
+ echo 'Your detailed IP info: IPv4 | IPv6';
}
-function readheader($value)
-{
+// HELPER FUNCTIONS
+function readheader($value) {
echo "" . $value . ": "; // show desired value
if(isset($_SERVER[$value])) { // only if desired header has been delivered
echo $_SERVER[$value];
}
- echo "
";
+ echo "
\n";
+}
+function ip2hostname($ip) {
+ $hostname = gethostbyaddr($ip);
+ return $hostname;
+}
+function hostname2ip($hostname) {
+ $ip = implode(', ', gethostbynamel($hostname));
+ return $ip;
+}
+function dnsrecords($hostname, $record = "DNS_ALL") {
+ if($record === "OTHER") {
+ $dnsrecords = dns_get_record($hostname, DNS_ALL - DNS_A - DNS_AAAA - DNS_MX - DNS_NS - DNS_TXT - DNS_SOA);
+ } else {
+ $dnsrecords = dns_get_record($hostname, constant($record));
+ }
+ return $dnsrecords;
+}
+function link_target($target) {
+ if(filter_var($target, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) || filter_var($target, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
+ // target is an IP
+ return "" . $target . "";
+ } elseif(preg_match('/^(?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63}$/', $target)) {
+ return "" . $target . "";
+ }
}
?>