/**
* Determines the intersection between an IP (with optional prefix) and a
* CIDR block.
*
* The IP will be checked against the CIDR block given and will either be
* inside or outside the CIDR completely, or partially.
*
* NOTE: The caller should explicitly check against the INTERSECT_*
* constants because this method will return a value > 1 even for partial
* matches.
*
* @param mixed $ip The IP/cidr to match
* @param mixed $cidr The CIDR block to match within
* @return integer Returns an INTERSECT_* constant
* @throws \InvalidArgumentException if either $ip or $cidr is invalid
*/
public static function cidr_intersect($ip, $cidr)
{
// use fixed length HEX strings so we can easily do STRING comparisons
// instead of using slower bccomp() math.
$map = function ($v) {
return sprintf("%032s", IP::inet_ptoh($v));
};
list($lo, $hi) = array_map($map, CIDR::cidr_to_range($ip));
list($min, $max) = array_map($map, CIDR::cidr_to_range($cidr));
/** visualization of logic used below
lo-hi = $ip to check
min-max = $cidr block being checked against
--- --- --- lo --- --- hi --- --- --- --- --- IP/prefix to check
--- min --- --- max --- --- --- --- --- --- --- Partial "LOW" match
--- --- --- --- --- min --- --- max --- --- --- Partial "HIGH" match
--- --- --- --- min max --- --- --- --- --- --- No match "NO"
--- --- --- --- --- --- --- --- min --- max --- No match "NO"
min --- max --- --- --- --- --- --- --- --- --- No match "NO"
--- --- min --- --- --- --- max --- --- --- --- Full match "YES"
*/
// IP is exact match or completely inside the CIDR block
if ($lo >= $min and $hi <= $max) {
return self::INTERSECT_YES;
}
// IP is completely outside the CIDR block
if ($max < $lo or $min > $hi) {
return self::INTERSECT_NO;
}
// @todo is it useful to return LOW/HIGH partial matches?
// IP matches the lower end
if ($max <= $hi and $min <= $lo) {
return self::INTERSECT_LOW;
}
// IP matches the higher end
if ($min >= $lo and $max >= $hi) {
return self::INTERSECT_HIGH;
}
return self::INTERSECT_NO;
}
/**
*
*/
public function putMod(Request $request, Board $board, $post)
{
// Validate the request parameters.
if (!($post = $this->validatePost($board, $post)) instanceof Post) {
// If the response isn't a Post, it's a redirect or error.
// Return the message.
return $post;
}
// Take trailing arguments,
// compare them against a list of real actions,
// intersect the liss to find the true commands.
$actions = ["delete", "ban", "all", "global"];
$argList = func_get_args();
$modActions = array_intersect($actions, array_splice($argList, 2));
sort($modActions);
$ban = in_array("ban", $modActions);
$delete = in_array("delete", $modActions);
$all = in_array("all", $modActions);
$global = in_array("global", $modActions);
if (!$ban) {
return abort(404);
}
$validator = Validator::make(Input::all(), ['raw_ip' => 'required|boolean', 'ban_ip' => 'required_if:raw_ip,true|ip', 'ban_ip_range' => 'required|between:0,128', 'justification' => 'max:255', 'expires_days' => 'required|integer|min:0|max:' . $this->option('banMaxLength'), 'expires_hours' => 'required|integer|min:0|max:23', 'expires_minutes' => 'required|integer|min:0|max:59']);
if (!$validator->passes()) {
return redirect()->back()->withInput(Input::all())->withErrors($validator->errors());
}
$banLengthStr = [];
$expiresDays = Input::get('expires_days');
$expiresHours = Input::get('expires_hours');
$expiresMinutes = Input::get('expires_minutes');
if ($expiresDays > 0) {
$banLengthStr[] = "{$expiresDays}d";
}
if ($expiresHours > 0) {
$banLengthStr[] = "{$expiresHours}h";
}
if ($expiresMinutes > 0) {
$banLengthStr[] = "{$expiresMinutes}m";
}
if ($expiresDays == 0 && $expiresHours == 0 && $expiresMinutes == 0) {
$banLengthStr[] = "Ø";
}
$banLengthStr = implode($banLengthStr, " ");
// If we're banning without the ability to view IP addresses, we will get our address directly from the post in human-readable format.
$banIpAddr = $this->user->canViewRawIP() ? Input::get('ban_ip') : $post->getAuthorIpAsString();
// The CIDR is passed from our post parameters. By default, it is 32/128 for IPv4/IPv6 respectively.
$banCidr = Input::get('ban_ip_range');
// This generates a range from start to finish. I.E. 192.168.1.3/22 becomes [192.168.0.0, 192.168.3.255].
// If we just pass the CDIR into the construct, we get 192.168.1.3-129.168.3.255 for some reason.
$banCidrRange = CIDR::cidr_to_range("{$banIpAddr}/{$banCidr}");
// We then pass this range into the construct method.
$banIp = new CIDR($banCidrRange[0], $banCidrRange[1]);
$ban = new Ban();
$ban->ban_ip_start = inet_pton($banIp->getStart());
$ban->ban_ip_end = inet_pton($banIp->getEnd());
$ban->seen = false;
$ban->created_at = $ban->freshTimestamp();
$ban->updated_at = clone $ban->created_at;
$ban->expires_at = clone $ban->created_at;
$ban->expires_at->addDays($expiresDays);
$ban->expires_at->addHours($expiresHours);
$ban->expires_at->addMinutes($expiresMinutes);
$ban->mod_id = $this->user->user_id;
$ban->post_id = $post->post_id;
$ban->ban_reason_id = null;
$ban->justification = Input::get('justification');
if ($global) {
if ($ban && !$this->user->canBanGlobally() || $delete && !$this->user->canDeleteGlobally()) {
return abort(403);
}
if ($ban) {
$ban->board_uri = null;
$ban->save();
}
$this->log('log.post.ban.global', $post, ["board_id" => $post->board_id, "board_uri" => $post->board_uri, "ip" => $post->getAuthorIpAsString(), "justification" => $ban->justification, "time" => $banLengthStr]);
if ($delete) {
$posts = Post::ipBinary($banIp);
$this->log('log.post.ban.delete', $post, ["board_id" => $post->board_id, "board_uri" => $post->board_uri, "posts" => $posts->count()]);
$posts->delete();
return redirect($board->board_uri);
}
} else {
if ($ban && !$board->canBan($this->user) || $delete && !$board->canDelete($this->user)) {
return abort(403);
}
if ($ban) {
$ban->board_uri = $post->board_uri;
$ban->save();
}
$this->log('log.post.ban.local', $post, ["board_id" => $post->board_id, "board_uri" => $post->board_uri, "ip" => $post->getAuthorIpAsString(), "justification" => $ban->justification, "time" => $banLengthStr]);
if ($delete) {
if ($all) {
$posts = Post::ipBinary($banIp)->where('board_uri', $board->board_uri);
$this->log('log.post.ban.delete', $post, ["board_id" => $post->board_id, "board_uri" => $post->board_uri, "posts" => $posts->count()]);
$posts->delete();
return redirect($board->board_uri);
} else {
$this->log('log.post.ban.delete', $post, ["board_id" => $post->board_id, "board_uri" => $post->board_uri, "posts" => 1]);
$post->delete();
if ($post->reply_to) {
return redirect("{$post->board_uri}/thread/{$post->op->board_id}");
} else {
return redirect($board->board_uri);
}
}
}
}
Event::fire(new PostWasBanned($post));
Event::fire(new PostWasModerated($post, $this->user));
if ($post->reply_to) {
return redirect("{$post->board_uri}/thread/{$post->op->board_id}#{$post->board_id}");
} else {
return redirect("{$post->board_uri}/thread/{$post->board_id}");
}
}
/**
* Converts an IPv4 or IPv6 CIDR block into its range.
*
* @static
* @param string $cidr CIDR block or IP address string.
* @param integer|null $bits If /bits is not specified on string they can be passed via this parameter instead.cidr_intersect
* @return array A 2 element array with the low, high range
*/
public static function cidr_to_range($cidr, $bits = null)
{
if ($cidr instanceof static) {
return parent::cidr_to_range($cidr->getCidr(), $bits);
}
return parent::cidr_to_range($cidr, $bits);
}