godot/core/io/ip_address.cpp
Fabio Alessandrelli b574e476ec Implement IP.get_local_interfaces.
Allow getting interfaces names and assigned names.

On UWP this is not supported, and the function will return one interface
for each local address (with interface name the local address itself).
2019-06-21 00:14:42 +02:00

263 lines
6.8 KiB
C++

/*************************************************************************/
/* ip_address.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 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_EXPLAIN("Invalid character in ipv6 address: " + p_string);
ERR_FAIL();
};
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_EXPLAIN("Invalid character in IPv6 address: " + p_string);
ERR_FAIL();
};
};
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(".");
if (slices != 4) {
ERR_EXPLAIN("Invalid IP Address String: " + ip);
ERR_FAIL();
}
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(!is_ipv4(), &(field8[12])); // 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);
}
}