| 1 |
<?php |
| 2 |
/** |
| 3 |
* Helper functions for IP related tasks. |
| 4 |
* |
| 5 |
* @package WP_Defender\Traits |
| 6 |
*/ |
| 7 |
|
| 8 |
namespace WP_Defender\Traits; |
| 9 |
|
| 10 |
use WP_Defender\Component\Http\Remote_Address; |
| 11 |
use WP_Defender\Component\Smart_Ip_Detection; |
| 12 |
use WP_Defender\Model\Setting\Firewall; |
| 13 |
|
| 14 |
trait IP { |
| 15 |
|
| 16 |
/** |
| 17 |
* Check if the IP is IPv4 address. |
| 18 |
* |
| 19 |
* @param string $ip The IP address to check. |
| 20 |
* |
| 21 |
* @return bool Returns true if the IP address is an IPv4 address, false otherwise. |
| 22 |
*/ |
| 23 |
private function is_v4( $ip ) { |
| 24 |
return false !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ); |
| 25 |
} |
| 26 |
|
| 27 |
/** |
| 28 |
* Check if the given IP address is an IPv6 address. |
| 29 |
* |
| 30 |
* @param string $ip The IP address to check. |
| 31 |
* |
| 32 |
* @return bool Returns true if the IP address is an IPv6 address, false otherwise. |
| 33 |
*/ |
| 34 |
private function is_v6( $ip ) { |
| 35 |
return false !== filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ); |
| 36 |
} |
| 37 |
|
| 38 |
/** |
| 39 |
* Check if IPv6 is supported. |
| 40 |
* |
| 41 |
* @return bool |
| 42 |
*/ |
| 43 |
private function is_v6_support(): bool { |
| 44 |
return defined( 'AF_INET6' ); |
| 45 |
} |
| 46 |
|
| 47 |
/** |
| 48 |
* Convert IPv4 address to IPv6 address. |
| 49 |
* |
| 50 |
* @param string $ip IPv4 address. |
| 51 |
* |
| 52 |
* @return bool|string |
| 53 |
*/ |
| 54 |
private function expand_ip_v6( $ip ) { |
| 55 |
$hex = unpack( 'H*hex', inet_pton( $ip ) ); |
| 56 |
|
| 57 |
return substr( preg_replace( '/([A-f0-9]{4})/', '$1:', $hex['hex'] ), 0, - 1 ); |
| 58 |
} |
| 59 |
|
| 60 |
/** |
| 61 |
* Convert IPv6 address to binary. |
| 62 |
* |
| 63 |
* @param string $inet The packed data. |
| 64 |
* @src https://stackoverflow.com/a/7951507 |
| 65 |
* |
| 66 |
* @return string |
| 67 |
*/ |
| 68 |
private function ine_to_bits( $inet ): string { |
| 69 |
$unpacked = unpack( 'a16', $inet ); |
| 70 |
$unpacked = str_split( $unpacked[1] ); |
| 71 |
$binaryip = ''; |
| 72 |
foreach ( $unpacked as $char ) { |
| 73 |
$binaryip .= str_pad( decbin( ord( $char ) ), 8, '0', STR_PAD_LEFT ); |
| 74 |
} |
| 75 |
|
| 76 |
return $binaryip; |
| 77 |
} |
| 78 |
|
| 79 |
/** |
| 80 |
* Compare if an IPv4 address is within a specified range. |
| 81 |
* |
| 82 |
* @param string $ip The IPv4 address to compare. |
| 83 |
* @param string $first_in_range The lower bound of the range. |
| 84 |
* @param string $last_in_range The upper bound of the range. |
| 85 |
* |
| 86 |
* @return bool Returns true if the IP address is within the range, false otherwise. |
| 87 |
*/ |
| 88 |
private function compare_v4_in_range( $ip, $first_in_range, $last_in_range ): bool { |
| 89 |
$low = sprintf( '%u', ip2long( $first_in_range ) ); |
| 90 |
$high = sprintf( '%u', ip2long( $last_in_range ) ); |
| 91 |
|
| 92 |
$cip = sprintf( '%u', ip2long( $ip ) ); |
| 93 |
if ( $high >= $cip && $cip >= $low ) { |
| 94 |
return true; |
| 95 |
} |
| 96 |
|
| 97 |
return false; |
| 98 |
} |
| 99 |
|
| 100 |
/** |
| 101 |
* Compare if an IPv6 address is within a specified range. |
| 102 |
* |
| 103 |
* @param string $ip The IPv6 address to compare. |
| 104 |
* @param string $first_in_range The lower bound of the range. |
| 105 |
* @param string $last_in_range The upper bound of the range. |
| 106 |
* |
| 107 |
* @return bool Returns true if the IP address is within the range, false otherwise. |
| 108 |
*/ |
| 109 |
private function compare_v6_in_range( $ip, $first_in_range, $last_in_range ): bool { |
| 110 |
$first_in_range = inet_pton( $this->expand_ip_v6( $first_in_range ) ); |
| 111 |
$last_in_range = inet_pton( $this->expand_ip_v6( $last_in_range ) ); |
| 112 |
$ip = inet_pton( $this->expand_ip_v6( $ip ) ); |
| 113 |
|
| 114 |
if ( ( strlen( $ip ) === strlen( $first_in_range ) ) |
| 115 |
&& ( $ip >= $first_in_range && $ip <= $last_in_range ) ) { |
| 116 |
return true; |
| 117 |
} else { |
| 118 |
return false; |
| 119 |
} |
| 120 |
} |
| 121 |
|
| 122 |
/** |
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* Compares an IPv4 address with a CIDR block. |
| 124 |
* |
| 125 |
* @param string $ip The IPv4 address to compare. |
| 126 |
* @param string $block The CIDR block to compare against. |
| 127 |
* |
| 128 |
* @return bool Returns true if the IP address is within the CIDR block, false otherwise. |
| 129 |
*/ |
| 130 |
private function compare_cidrv4( $ip, $block ): bool { |
| 131 |
[ $subnet, $bits ] = explode( '/', $block ); |
| 132 |
if ( is_null( $bits ) ) { |
| 133 |
$bits = 32; |
| 134 |
} |
| 135 |
$ip = ip2long( $ip ); |
| 136 |
$subnet = ip2long( $subnet ); |
| 137 |
$mask = - 1 << ( 32 - (int) $bits ); |
| 138 |
$subnet &= $mask;// nb: in case the supplied subnet wasn't correctly aligned. |
| 139 |
|
| 140 |
return ( $ip & $mask ) === $subnet; |
| 141 |
} |
| 142 |
|
| 143 |
/** |
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* Compares an IPv6 address with a CIDR block. |
| 145 |
* |
| 146 |
* @param string $ip The IPv6 address to compare. |
| 147 |
* @param string $block The CIDR block to compare against. |
| 148 |
* |
| 149 |
* @return bool Returns true if the IP address is within the CIDR block, false otherwise. |
| 150 |
*/ |
| 151 |
private function compare_cidrv6( $ip, $block ): bool { |
| 152 |
$ip = $this->expand_ip_v6( $ip ); |
| 153 |
$ip = inet_pton( $ip ); |
| 154 |
$b_ip = $this->ine_to_bits( $ip ); |
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[ $subnet, $bits ] = explode( '/', $block ); |
| 156 |
$subnet = $this->expand_ip_v6( $subnet ); |
| 157 |
$subnet = inet_pton( $subnet ); |
| 158 |
$b_subnet = $this->ine_to_bits( $subnet ); |
| 159 |
|
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$ip_net_bits = substr( $b_ip, 0, (int) $bits ); |
| 161 |
$subnet_bits = substr( $b_subnet, 0, (int) $bits ); |
| 162 |
|
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return $ip_net_bits === $subnet_bits; |
| 164 |
} |
| 165 |
|
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/** |
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* Compare ip2 to ip1, true if ip2>ip1, false if not. |
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* |
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* @param string $ip1 The first IP address to compare. |
| 170 |
* @param string $ip2 The second IP address to compare. |
| 171 |
* |
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* @return bool Returns true if ip2 is greater than ip1, false otherwise. |
| 173 |
*/ |
| 174 |
public function compare_ip( $ip1, $ip2 ): bool { |
| 175 |
if ( $this->is_v4( $ip1 ) && $this->is_v4( $ip2 ) ) { |
| 176 |
if ( sprintf( '%u', ip2long( $ip2 ) ) - sprintf( '%u', ip2long( $ip1 ) ) > 0 ) { |
| 177 |
return true; |
| 178 |
} |
| 179 |
} elseif ( $this->is_v6( $ip1 ) && $this->is_v6( $ip2 ) && $this->is_v6_support() ) { |
| 180 |
$ip1 = inet_pton( $this->expand_ip_v6( $ip1 ) ); |
| 181 |
$ip2 = inet_pton( $this->expand_ip_v6( $ip2 ) ); |
| 182 |
|
| 183 |
return $ip2 > $ip1; |
| 184 |
} |
| 185 |
|
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return false; |
| 187 |
} |
| 188 |
|
| 189 |
/** |
| 190 |
* Compare if an IP address is within a specified range. |
| 191 |
* |
| 192 |
* @param string $ip The IP address to compare. |
| 193 |
* @param string $first_in_range The lower bound of the range. |
| 194 |
* @param string $last_in_range The upper bound of the range. |
| 195 |
* |
| 196 |
* @return bool Returns true if the IP address is within the range, false otherwise. |
| 197 |
*/ |
| 198 |
public function compare_in_range( $ip, $first_in_range, $last_in_range ): bool { |
| 199 |
if ( $this->is_v4( $first_in_range ) && $this->is_v4( $last_in_range ) ) { |
| 200 |
return $this->compare_v4_in_range( $ip, $first_in_range, $last_in_range ); |
| 201 |
} elseif ( $this->is_v6( $first_in_range ) && $this->is_v6( $last_in_range ) && $this->is_v6_support() ) { |
| 202 |
return $this->compare_v6_in_range( $ip, $first_in_range, $last_in_range ); |
| 203 |
} |
| 204 |
|
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return false; |
| 206 |
} |
| 207 |
|
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/** |
| 209 |
* Compares an IP address with a CIDR block. |
| 210 |
* |
| 211 |
* @param string $ip The IP address to compare. |
| 212 |
* @param string $block The CIDR block to compare against. |
| 213 |
* |
| 214 |
* @return bool Returns true if the IP address is within the CIDR block, false otherwise. |
| 215 |
*/ |
| 216 |
public function compare_cidr( $ip, $block ): bool { |
| 217 |
[ $subnet, $bits ] = explode( '/', $block ); |
| 218 |
if ( $this->is_v4( $ip ) && $this->is_v4( $subnet ) ) { |
| 219 |
return $this->compare_cidrv4( $ip, $block ); |
| 220 |
} elseif ( $this->is_v6( $ip ) && $this->is_v6( $subnet ) && $this->is_v6_support() ) { |
| 221 |
return $this->compare_cidrv6( $ip, $block ); |
| 222 |
} |
| 223 |
|
| 224 |
return false; |
| 225 |
} |
| 226 |
|
| 227 |
/** |
| 228 |
* $ip an be single ip, or a range like xxx.xxx.xxx.xxx - xxx.xxx.xxx.xxx or CIDR. |
| 229 |
* |
| 230 |
* @param string $ip The IP address to validate. |
| 231 |
* |
| 232 |
* @return bool |
| 233 |
*/ |
| 234 |
public function validate_ip( $ip ): bool { |
| 235 |
if ( |
| 236 |
! stristr( $ip, '-' ) |
| 237 |
&& ! stristr( $ip, '/' ) |
| 238 |
&& filter_var( $ip, FILTER_VALIDATE_IP ) ) { |
| 239 |
// Only ip, no '-', '/' symbols. |
| 240 |
return true; |
| 241 |
} elseif ( stristr( $ip, '-' ) ) { |
| 242 |
$ips = explode( '-', $ip ); |
| 243 |
foreach ( $ips as $ip_key ) { |
| 244 |
if ( ! filter_var( $ip_key, FILTER_VALIDATE_IP ) ) { |
| 245 |
return false; |
| 246 |
} |
| 247 |
} |
| 248 |
if ( $this->compare_ip( $ips[0], $ips[1] ) ) { |
| 249 |
return true; |
| 250 |
} |
| 251 |
} elseif ( stristr( $ip, '/' ) ) { |
| 252 |
[ $ip, $bits ] = explode( '/', $ip ); |
| 253 |
if ( filter_var( $ip, FILTER_VALIDATE_IP ) && filter_var( $bits, FILTER_VALIDATE_INT ) ) { |
| 254 |
if ( $this->is_v4( $ip ) && 0 <= $bits && $bits <= 32 ) { |
| 255 |
return true; |
| 256 |
} elseif ( $this->is_v6( $ip ) && 0 <= $bits && $bits <= 128 && $this->is_v6_support() ) { |
| 257 |
return true; |
| 258 |
} |
| 259 |
} |
| 260 |
} |
| 261 |
|
| 262 |
return false; |
| 263 |
} |
| 264 |
|
| 265 |
/** |
| 266 |
* Display a message if IP is non-valid. The cases: |
| 267 |
* 1) single IP (no '-', '/' symbols), |
| 268 |
* 2) IP range, |
| 269 |
* 3) CIDR. |
| 270 |
* Ignore cases with private, reserved ranges. |
| 271 |
* |
| 272 |
* @src https://en.wikipedia.org/wiki/IPv4#Special-use_addresses |
| 273 |
* @src https://en.wikipedia.org/wiki/IPv6#Special-use_addresses |
| 274 |
* |
| 275 |
* @param mixed $ip IP address. |
| 276 |
* |
| 277 |
* @return array |
| 278 |
*/ |
| 279 |
public function display_validation_message( $ip ): array { |
| 280 |
$errors = array(); |
| 281 |
// Case 1: single IP. |
| 282 |
if ( |
| 283 |
! stristr( $ip, '-' ) |
| 284 |
&& ! stristr( $ip, '/' ) |
| 285 |
&& ! filter_var( $ip, FILTER_VALIDATE_IP ) ) { |
| 286 |
$errors[] = sprintf( |
| 287 |
/* translators: %s: IP value. */ |
| 288 |
esc_html__( '%s – invalid format', 'defender-security' ), |
| 289 |
'<b>' . $ip . '</b>' |
| 290 |
); |
| 291 |
// Case 2: IP range. |
| 292 |
} elseif ( stristr( $ip, '-' ) ) { |
| 293 |
$ips = explode( '-', $ip ); |
| 294 |
foreach ( $ips as $ip_key ) { |
| 295 |
if ( ! filter_var( $ip_key, FILTER_VALIDATE_IP ) ) { |
| 296 |
$errors[] = sprintf( |
| 297 |
/* translators: %s: IP value. */ |
| 298 |
esc_html__( '%s – invalid format', 'defender-security' ), |
| 299 |
'<b>' . $ip_key . '</b>' |
| 300 |
); |
| 301 |
} |
| 302 |
} |
| 303 |
if ( ! $this->compare_ip( $ips[0], $ips[1] ) ) { |
| 304 |
$errors[] = sprintf( |
| 305 |
/* translators: 1. IP value. 2. IP value. */ |
| 306 |
esc_html__( 'Can\'t compare %1$s with %2$s.', 'defender-security' ), |
| 307 |
'<b>' . $ips[1] . '</b>', |
| 308 |
'<b>' . $ips[0] . '</b>' |
| 309 |
); |
| 310 |
} |
| 311 |
// Case 3: CIDR. |
| 312 |
} elseif ( stristr( $ip, '/' ) ) { |
| 313 |
[ $ip, $bits ] = explode( '/', $ip ); |
| 314 |
if ( filter_var( $ip, FILTER_VALIDATE_IP ) && filter_var( $bits, FILTER_VALIDATE_INT ) ) { |
| 315 |
if ( ! $this->is_v4( $ip ) || 0 > $bits || $bits > 32 ) { |
| 316 |
if ( ! $this->is_v6( $ip ) || 0 > $bits || $bits > 128 || ! $this->is_v6_support() ) { |
| 317 |
$errors[] = sprintf( |
| 318 |
/* translators: %s: IP value. */ |
| 319 |
esc_html__( '%s – address out of range', 'defender-security' ), |
| 320 |
'<b>' . $ip . '</b>' |
| 321 |
); |
| 322 |
} |
| 323 |
} |
| 324 |
} else { |
| 325 |
$errors[] = sprintf( |
| 326 |
/* translators: %s: IP value. */ |
| 327 |
esc_html__( '%s – invalid format', 'defender-security' ), |
| 328 |
'<b>' . $ip . '</b>' |
| 329 |
); |
| 330 |
} |
| 331 |
} |
| 332 |
|
| 333 |
// @since 2.6.3 |
| 334 |
return (array) apply_filters( 'wd_display_ip_validations', $errors ); |
| 335 |
} |
| 336 |
|
| 337 |
/** |
| 338 |
* Validate IP. |
| 339 |
* |
| 340 |
* @param mixed $ip IP address. |
| 341 |
* |
| 342 |
* @return bool |
| 343 |
*/ |
| 344 |
public function check_validate_ip( $ip ): bool { |
| 345 |
// Validate the localhost IP address. |
| 346 |
if ( in_array( $ip, $this->get_localhost_ips(), true ) ) { |
| 347 |
return true; |
| 348 |
} |
| 349 |
|
| 350 |
$filter_flags = FILTER_FLAG_IPV4 | FILTER_FLAG_IPV6; |
| 351 |
// @since 2.4.7 |
| 352 |
if ( apply_filters( 'wp_defender_filtered_internal_ip', false ) ) { |
| 353 |
// Todo: improve display of IP log when filtering reserved or private IPv4/IPv6 ranges. |
| 354 |
$filter_flags = $filter_flags | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE; |
| 355 |
} |
| 356 |
|
| 357 |
if ( false === filter_var( $ip, FILTER_VALIDATE_IP, $filter_flags ) ) { |
| 358 |
return false; |
| 359 |
} |
| 360 |
|
| 361 |
return true; |
| 362 |
} |
| 363 |
|
| 364 |
/** |
| 365 |
* Get user IP. |
| 366 |
* |
| 367 |
* @return array |
| 368 |
*/ |
| 369 |
public function get_user_ip(): array { |
| 370 |
$service = wd_di()->get( Smart_Ip_Detection::class ); |
| 371 |
if ( $service->is_smart_ip_detection_enabled() ) { |
| 372 |
$ip_detail = $service->get_smart_ip_detection_details(); |
| 373 |
$ips = isset( $ip_detail[0] ) ? array( $ip_detail[0] ) : array(); |
| 374 |
} else { |
| 375 |
$remote_addr = wd_di()->get( Remote_Address::class ); |
| 376 |
$ips = (array) $remote_addr->get_ip_address(); |
| 377 |
} |
| 378 |
|
| 379 |
return $this->filter_user_ips( $ips ); |
| 380 |
} |
| 381 |
|
| 382 |
/** |
| 383 |
* Get user IP header. |
| 384 |
* |
| 385 |
* @return string |
| 386 |
*/ |
| 387 |
public function get_user_ip_header(): string { |
| 388 |
$ip_header = ''; |
| 389 |
|
| 390 |
$service = wd_di()->get( Smart_Ip_Detection::class ); |
| 391 |
if ( $service->is_smart_ip_detection_enabled() ) { |
| 392 |
$ip_detail = $service->get_smart_ip_detection_details(); |
| 393 |
$ip_header = isset( $ip_detail[1] ) ? $ip_detail[1] : ''; |
| 394 |
} else { |
| 395 |
$model = wd_di()->get( Firewall::class ); |
| 396 |
$remote_addr = wd_di()->get( Remote_Address::class ); |
| 397 |
$ip_header = $remote_addr->get_http_ip_header_value( esc_html( $model->http_ip_header ) ); |
| 398 |
} |
| 399 |
|
| 400 |
return $ip_header; |
| 401 |
} |
| 402 |
|
| 403 |
/** |
| 404 |
* Checks if an IP address is in the correct format within a given array of IP addresses. |
| 405 |
* |
| 406 |
* @param string $ip The IP address to check. |
| 407 |
* @param array $arr_ips An array of IP addresses to check against. |
| 408 |
* |
| 409 |
* @return bool Returns true if the IP address is in the correct format within the array, false otherwise. |
| 410 |
*/ |
| 411 |
public function is_ip_in_format( $ip, $arr_ips ): bool { |
| 412 |
foreach ( $arr_ips as $wip ) { |
| 413 |
if ( false === strpos( $wip, '-' ) && false === strpos( $wip, '/' ) && trim( $wip ) === $ip ) { |
| 414 |
return true; |
| 415 |
} elseif ( false !== strpos( $wip, '-' ) ) { |
| 416 |
$ips = explode( '-', $wip ); |
| 417 |
if ( $this->compare_in_range( $ip, $ips[0], $ips[1] ) ) { |
| 418 |
return true; |
| 419 |
} |
| 420 |
} elseif ( false !== strpos( $wip, '/' ) && $this->compare_cidr( $ip, $wip ) ) { |
| 421 |
return true; |
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
return false; |
| 426 |
} |
| 427 |
|
| 428 |
/** |
| 429 |
* Filter user IPs. |
| 430 |
* This function takes an array of user IPs, applies the 'defender_user_ip' |
| 431 |
* filter to each IP, and returns a unique array of filtered values. |
| 432 |
* |
| 433 |
* @param array $ips An array of user IPs. |
| 434 |
* |
| 435 |
* @return array An array of unique, filtered user IPs. |
| 436 |
* @since 4.4.2 |
| 437 |
*/ |
| 438 |
public function filter_user_ips( array $ips ): array { |
| 439 |
$ips_filtered = array(); |
| 440 |
foreach ( $ips as $ip ) { |
| 441 |
/** |
| 442 |
* Filters the user IP. |
| 443 |
* |
| 444 |
* @param string $ip The user IP. |
| 445 |
*/ |
| 446 |
$ips_filtered[] = apply_filters( 'defender_user_ip', $ip ); |
| 447 |
} |
| 448 |
|
| 449 |
return array_unique( $ips_filtered ); |
| 450 |
} |
| 451 |
|
| 452 |
/** |
| 453 |
* Use $_SERVER['REMOTE_ADDR'] as the first protection layer to avoid spoofed headers. |
| 454 |
* |
| 455 |
* @param string $blocked_ip The IP address to check. |
| 456 |
* |
| 457 |
* @return string |
| 458 |
*/ |
| 459 |
public function check_ip_by_remote_addr( $blocked_ip ): string { |
| 460 |
$ip_addr = defender_get_data_from_request( 'REMOTE_ADDR', 's' ); |
| 461 |
|
| 462 |
return '' !== $ip_addr ? $ip_addr : $blocked_ip; |
| 463 |
} |
| 464 |
|
| 465 |
/** |
| 466 |
* Check if the given IP is a private IP. |
| 467 |
* |
| 468 |
* @param string $ip The IP address to check. |
| 469 |
* |
| 470 |
* @return bool True if the IP is a private IP, false otherwise. |
| 471 |
*/ |
| 472 |
public function is_private_ip( string $ip ): bool { |
| 473 |
return filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE | FILTER_FLAG_NO_PRIV_RANGE ) === false; |
| 474 |
} |
| 475 |
|
| 476 |
/** |
| 477 |
* Maybe Loopback? |
| 478 |
* Don't check '127.0.0.0/8' and '::1/128'. |
| 479 |
* |
| 480 |
* @return array |
| 481 |
*/ |
| 482 |
public function get_localhost_ips(): array { |
| 483 |
return array( '127.0.0.1', '::1' ); |
| 484 |
} |
| 485 |
|
| 486 |
/** |
| 487 |
* Determines if the current request originates from this server. |
| 488 |
* |
| 489 |
* Validates that the request is a loopback from the server by: |
| 490 |
* 1. Matching the IP against localhost, hostname IP, or a whitelisted server public IP. |
| 491 |
* 2. Matching the User-Agent against the WordPress core loopback format. |
| 492 |
* |
| 493 |
* @return bool True if it's a valid server-originated loopback request; false otherwise. |
| 494 |
*/ |
| 495 |
public function request_is_from_server(): bool { |
| 496 |
$user_ips = $this->get_user_ip(); |
| 497 |
if ( array() === $user_ips ) { |
| 498 |
return false; |
| 499 |
} |
| 500 |
|
| 501 |
// Start building list of trusted server IPs. |
| 502 |
$trusted_ips = $this->get_localhost_ips(); |
| 503 |
$server_ip = defender_get_data_from_request( 'SERVER_ADDR', 's' ); |
| 504 |
if ( $this->check_validate_ip( $server_ip ) ) { |
| 505 |
$trusted_ips[] = $server_ip; |
| 506 |
} |
| 507 |
|
| 508 |
$stored_ip = get_site_option( \WP_Defender\Component\Firewall::WHITELIST_SERVER_PUBLIC_IP_OPTION, '' ); |
| 509 |
if ( $this->check_validate_ip( $stored_ip ) ) { |
| 510 |
$trusted_ips[] = $stored_ip; |
| 511 |
} |
| 512 |
|
| 513 |
/** |
| 514 |
* Filters the list of trusted server IP addresses used to validate server-originated loopback requests. |
| 515 |
* |
| 516 |
* This filter allows developers to customize the list of IP addresses considered as trusted sources |
| 517 |
* for internal server requests. These IPs are checked against the request's origin IP to determine |
| 518 |
* whether it's a valid server-initiated loopback (e.g., WordPress cron or REST loopback check). |
| 519 |
* |
| 520 |
* Common use cases: |
| 521 |
* - Add public-facing server IPs behind proxies/load balancers. |
| 522 |
* - Adjust loopback behavior in containerized or cloud environments. |
| 523 |
* - Remove/override default server hostname resolution or localhost IPs. |
| 524 |
* |
| 525 |
* @since 5.3.0 |
| 526 |
* |
| 527 |
* @param array $trusted_ips An array of trusted server IP addresses. |
| 528 |
*/ |
| 529 |
$trusted_ips = (array) apply_filters( 'wp_defender_server_ips', array_unique( $trusted_ips ) ); |
| 530 |
// Only return true if the request IP is in the trusted list. |
| 531 |
if ( array() !== array_intersect( $user_ips, $trusted_ips ) ) { |
| 532 |
return true; |
| 533 |
} |
| 534 |
|
| 535 |
// User-Agent missing? Not a valid loopback. |
| 536 |
$server_agent = defender_get_data_from_request( 'HTTP_USER_AGENT', 's' ); |
| 537 |
if ( '' === $server_agent ) { |
| 538 |
return false; |
| 539 |
} |
| 540 |
|
| 541 |
// User-Agent must match WordPress loopback format. |
| 542 |
$expected_ua = 'WordPress/' . wp_get_wp_version() . '; ' . home_url( '/' ); |
| 543 |
|
| 544 |
return $server_agent === $expected_ua; |
| 545 |
} |
| 546 |
} |
| 547 |
|
