245 lines
6.8 KiB
C++
245 lines
6.8 KiB
C++
/*************************************************************************/
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/* ip_address.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "ip_address.h"
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/*
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IP_Address::operator Variant() const {
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return operator String();
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}*/
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#include <stdio.h>
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#include <string.h>
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IP_Address::operator String() const {
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if (wildcard) {
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return "*";
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}
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if (!valid) {
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return "";
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}
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if (is_ipv4()) {
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// IPv4 address mapped to IPv6
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return itos(field8[12]) + "." + itos(field8[13]) + "." + itos(field8[14]) + "." + itos(field8[15]);
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}
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String ret;
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for (int i = 0; i < 8; i++) {
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if (i > 0) {
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ret = ret + ":";
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}
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uint16_t num = (field8[i * 2] << 8) + field8[i * 2 + 1];
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ret = ret + String::num_int64(num, 16);
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}
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return ret;
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}
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static void _parse_hex(const String &p_string, int p_start, uint8_t *p_dst) {
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uint16_t ret = 0;
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for (int i = p_start; i < p_start + 4; i++) {
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if (i >= p_string.length()) {
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break;
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}
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int n = 0;
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char32_t c = p_string[i];
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if (c >= '0' && c <= '9') {
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n = c - '0';
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} else if (c >= 'a' && c <= 'f') {
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n = 10 + (c - 'a');
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} else if (c >= 'A' && c <= 'F') {
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n = 10 + (c - 'A');
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} else if (c == ':') {
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break;
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} else {
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ERR_FAIL_MSG("Invalid character in IPv6 address: " + p_string + ".");
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}
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ret = ret << 4;
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ret += n;
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}
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p_dst[0] = ret >> 8;
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p_dst[1] = ret & 0xff;
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}
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void IP_Address::_parse_ipv6(const String &p_string) {
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static const int parts_total = 8;
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int parts[parts_total] = { 0 };
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int parts_count = 0;
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bool part_found = false;
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bool part_skip = false;
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bool part_ipv4 = false;
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int parts_idx = 0;
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for (int i = 0; i < p_string.length(); i++) {
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char32_t c = p_string[i];
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if (c == ':') {
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if (i == 0) {
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continue; // next must be a ":"
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}
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if (!part_found) {
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part_skip = true;
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parts[parts_idx++] = -1;
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}
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part_found = false;
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} else if (c == '.') {
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part_ipv4 = true;
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} else if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) {
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if (!part_found) {
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parts[parts_idx++] = i;
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part_found = true;
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++parts_count;
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}
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} else {
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ERR_FAIL_MSG("Invalid character in IPv6 address: " + p_string + ".");
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}
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}
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int parts_extra = 0;
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if (part_skip) {
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parts_extra = parts_total - parts_count;
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}
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int idx = 0;
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for (int i = 0; i < parts_idx; i++) {
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if (parts[i] == -1) {
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for (int j = 0; j < parts_extra; j++) {
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field16[idx++] = 0;
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}
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continue;
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}
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if (part_ipv4 && i == parts_idx - 1) {
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_parse_ipv4(p_string, parts[i], (uint8_t *)&field16[idx]); // should be the last one
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} else {
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_parse_hex(p_string, parts[i], (uint8_t *)&(field16[idx++]));
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}
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}
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}
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void IP_Address::_parse_ipv4(const String &p_string, int p_start, uint8_t *p_ret) {
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String ip;
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if (p_start != 0) {
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ip = p_string.substr(p_start, p_string.length() - p_start);
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} else {
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ip = p_string;
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}
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int slices = ip.get_slice_count(".");
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ERR_FAIL_COND_MSG(slices != 4, "Invalid IP address string: " + ip + ".");
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for (int i = 0; i < 4; i++) {
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p_ret[i] = ip.get_slicec('.', i).to_int();
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}
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}
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void IP_Address::clear() {
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memset(&field8[0], 0, sizeof(field8));
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valid = false;
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wildcard = false;
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}
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bool IP_Address::is_ipv4() const {
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return (field32[0] == 0 && field32[1] == 0 && field16[4] == 0 && field16[5] == 0xffff);
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}
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const uint8_t *IP_Address::get_ipv4() const {
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ERR_FAIL_COND_V_MSG(!is_ipv4(), &(field8[12]), "IPv4 requested, but current IP is IPv6."); // Not the correct IPv4 (it's an IPv6), but we don't want to return a null pointer risking an engine crash.
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return &(field8[12]);
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}
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void IP_Address::set_ipv4(const uint8_t *p_ip) {
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clear();
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valid = true;
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field16[5] = 0xffff;
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field32[3] = *((const uint32_t *)p_ip);
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}
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const uint8_t *IP_Address::get_ipv6() const {
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return field8;
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}
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void IP_Address::set_ipv6(const uint8_t *p_buf) {
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clear();
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valid = true;
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for (int i = 0; i < 16; i++) {
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field8[i] = p_buf[i];
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}
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}
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IP_Address::IP_Address(const String &p_string) {
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clear();
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if (p_string == "*") {
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// Wildcard (not a valid IP)
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wildcard = true;
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} else if (p_string.find(":") >= 0) {
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// IPv6
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_parse_ipv6(p_string);
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valid = true;
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} else if (p_string.get_slice_count(".") == 4) {
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// IPv4 (mapped to IPv6 internally)
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field16[5] = 0xffff;
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_parse_ipv4(p_string, 0, &field8[12]);
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valid = true;
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} else {
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ERR_PRINT("Invalid IP address.");
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}
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}
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_FORCE_INLINE_ static void _32_to_buf(uint8_t *p_dst, uint32_t p_n) {
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p_dst[0] = (p_n >> 24) & 0xff;
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p_dst[1] = (p_n >> 16) & 0xff;
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p_dst[2] = (p_n >> 8) & 0xff;
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p_dst[3] = (p_n >> 0) & 0xff;
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}
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IP_Address::IP_Address(uint32_t p_a, uint32_t p_b, uint32_t p_c, uint32_t p_d, bool is_v6) {
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clear();
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valid = true;
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if (!is_v6) {
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// Mapped to IPv6
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field16[5] = 0xffff;
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field8[12] = p_a;
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field8[13] = p_b;
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field8[14] = p_c;
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field8[15] = p_d;
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} else {
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_32_to_buf(&field8[0], p_a);
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_32_to_buf(&field8[4], p_b);
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_32_to_buf(&field8[8], p_c);
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_32_to_buf(&field8[12], p_d);
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}
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}
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