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/*************************************************************************/
/* ip_address.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "ip_address.h"
/*
IP_Address::operator Variant() const {
return operator String();
}*/
#include <stdio.h>
#include <string.h>
IP_Address::operator String() const {
if (wildcard)
return "*";
if (!valid)
return "";
if (is_ipv4())
// IPv4 address mapped to IPv6
return itos(field8[12]) + "." + itos(field8[13]) + "." + itos(field8[14]) + "." + itos(field8[15]);
String ret;
for (int i = 0; i < 8; i++) {
if (i > 0)
ret = ret + ":";
uint16_t num = (field8[i * 2] << 8) + field8[i * 2 + 1];
ret = ret + String::num_int64(num, 16);
};
return ret;
}
static void _parse_hex(const String &p_string, int p_start, uint8_t *p_dst) {
uint16_t ret = 0;
for (int i = p_start; i < p_start + 4; i++) {
if (i >= p_string.length()) {
break;
};
int n = 0;
CharType c = p_string[i];
if (c >= '0' && c <= '9') {
n = c - '0';
} else if (c >= 'a' && c <= 'f') {
n = 10 + (c - 'a');
} else if (c >= 'A' && c <= 'F') {
n = 10 + (c - 'A');
} else if (c == ':') {
break;
} else {
ERR_FAIL_MSG("Invalid character in IPv6 address: " + p_string + ".");
};
ret = ret << 4;
ret += n;
};
p_dst[0] = ret >> 8;
p_dst[1] = ret & 0xff;
};
void IP_Address::_parse_ipv6(const String &p_string) {
static const int parts_total = 8;
int parts[parts_total] = { 0 };
int parts_count = 0;
bool part_found = false;
bool part_skip = false;
bool part_ipv4 = false;
int parts_idx = 0;
for (int i = 0; i < p_string.length(); i++) {
CharType c = p_string[i];
if (c == ':') {
if (i == 0) {
continue; // next must be a ":"
};
if (!part_found) {
part_skip = true;
parts[parts_idx++] = -1;
};
part_found = false;
} else if (c == '.') {
part_ipv4 = true;
} else if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) {
if (!part_found) {
parts[parts_idx++] = i;
part_found = true;
++parts_count;
};
} else {
ERR_FAIL_MSG("Invalid character in IPv6 address: " + p_string + ".");
};
};
int parts_extra = 0;
if (part_skip) {
parts_extra = parts_total - parts_count;
};
int idx = 0;
for (int i = 0; i < parts_idx; i++) {
if (parts[i] == -1) {
for (int j = 0; j < parts_extra; j++) {
field16[idx++] = 0;
};
continue;
};
if (part_ipv4 && i == parts_idx - 1) {
_parse_ipv4(p_string, parts[i], (uint8_t *)&field16[idx]); // should be the last one
} else {
_parse_hex(p_string, parts[i], (uint8_t *)&(field16[idx++]));
};
};
};
void IP_Address::_parse_ipv4(const String &p_string, int p_start, uint8_t *p_ret) {
String ip;
if (p_start != 0) {
ip = p_string.substr(p_start, p_string.length() - p_start);
} else {
ip = p_string;
};
int slices = ip.get_slice_count(".");
ERR_FAIL_COND_MSG(slices != 4, "Invalid IP address string: " + ip + ".");
for (int i = 0; i < 4; i++) {
p_ret[i] = ip.get_slicec('.', i).to_int();
}
};
void IP_Address::clear() {
memset(&field8[0], 0, sizeof(field8));
valid = false;
wildcard = false;
};
bool IP_Address::is_ipv4() const {
return (field32[0] == 0 && field32[1] == 0 && field16[4] == 0 && field16[5] == 0xffff);
}
const uint8_t *IP_Address::get_ipv4() const {
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.
return &(field8[12]);
}
void IP_Address::set_ipv4(const uint8_t *p_ip) {
clear();
valid = true;
field16[5] = 0xffff;
field32[3] = *((const uint32_t *)p_ip);
}
const uint8_t *IP_Address::get_ipv6() const {
return field8;
}
void IP_Address::set_ipv6(const uint8_t *p_buf) {
clear();
valid = true;
for (int i = 0; i < 16; i++)
field8[i] = p_buf[i];
}
IP_Address::IP_Address(const String &p_string) {
clear();
if (p_string == "*") {
// Wildcard (not a valid IP)
wildcard = true;
} else if (p_string.find(":") >= 0) {
// IPv6
_parse_ipv6(p_string);
valid = true;
} else if (p_string.get_slice_count(".") == 4) {
// IPv4 (mapped to IPv6 internally)
field16[5] = 0xffff;
_parse_ipv4(p_string, 0, &field8[12]);
valid = true;
} else {
ERR_PRINT("Invalid IP address.");
}
}
_FORCE_INLINE_ static void _32_to_buf(uint8_t *p_dst, uint32_t p_n) {
p_dst[0] = (p_n >> 24) & 0xff;
p_dst[1] = (p_n >> 16) & 0xff;
p_dst[2] = (p_n >> 8) & 0xff;
p_dst[3] = (p_n >> 0) & 0xff;
};
IP_Address::IP_Address(uint32_t p_a, uint32_t p_b, uint32_t p_c, uint32_t p_d, bool is_v6) {
clear();
valid = true;
if (!is_v6) {
// Mapped to IPv6
field16[5] = 0xffff;
field8[12] = p_a;
field8[13] = p_b;
field8[14] = p_c;
field8[15] = p_d;
} else {
_32_to_buf(&field8[0], p_a);
_32_to_buf(&field8[4], p_b);
_32_to_buf(&field8[8], p_c);
_32_to_buf(&field8[12], p_d);
}
}
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