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godot/drivers/unix/ip_unix.cpp

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/*************************************************************************/
/* ip_unix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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_unix.h"
#if defined(UNIX_ENABLED) || defined(WINDOWS_ENABLED)
#include <string.h>
#ifdef WINDOWS_ENABLED
#include <stdio.h>
#include <winsock2.h>
// Needs to be included after winsocks2.h
#include <windows.h>
#include <ws2tcpip.h>
#ifndef UWP_ENABLED
#if defined(__MINGW32__) && (!defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 4)
// MinGW-w64 on Ubuntu 12.04 (our Travis build env) has bugs in this code where
// some includes are missing in dependencies of iphlpapi.h for WINVER >= 0x0600 (Vista).
// We don't use this Vista code for now, so working it around by disabling it.
// MinGW-w64 >= 4.0 seems to be better judging by its headers.
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0501 // Windows XP, disable Vista API
#include <iphlpapi.h>
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0600 // Re-enable Vista API
#else
#include <iphlpapi.h>
#endif // MINGW hack
#endif
#else // UNIX
#include <netdb.h>
#ifdef ANDROID_ENABLED
// We could drop this file once we up our API level to 24,
// where the NDK's ifaddrs.h supports to needed getifaddrs.
#include "thirdparty/misc/ifaddrs-android.h"
#else
#ifdef __FreeBSD__
#include <sys/types.h>
#endif
#include <ifaddrs.h>
#endif
#include <arpa/inet.h>
#include <sys/socket.h>
#ifdef __FreeBSD__
#include <netinet/in.h>
#endif
#include <net/if.h> // Order is important on OpenBSD, leave as last
#endif
static IP_Address _sockaddr2ip(struct sockaddr *p_addr) {
IP_Address ip;
if (p_addr->sa_family == AF_INET) {
struct sockaddr_in *addr = (struct sockaddr_in *)p_addr;
ip.set_ipv4((uint8_t *)&(addr->sin_addr));
} else if (p_addr->sa_family == AF_INET6) {
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)p_addr;
ip.set_ipv6(addr6->sin6_addr.s6_addr);
};
return ip;
};
IP_Address IP_Unix::_resolve_hostname(const String &p_hostname, Type p_type) {
struct addrinfo hints;
struct addrinfo *result;
memset(&hints, 0, sizeof(struct addrinfo));
if (p_type == TYPE_IPV4) {
hints.ai_family = AF_INET;
} else if (p_type == TYPE_IPV6) {
hints.ai_family = AF_INET6;
hints.ai_flags = 0;
} else {
hints.ai_family = AF_UNSPEC;
hints.ai_flags = AI_ADDRCONFIG;
};
hints.ai_flags &= ~AI_NUMERICHOST;
int s = getaddrinfo(p_hostname.utf8().get_data(), nullptr, &hints, &result);
if (s != 0) {
ERR_PRINT("getaddrinfo failed! Cannot resolve hostname.");
return IP_Address();
};
if (result == nullptr || result->ai_addr == nullptr) {
ERR_PRINT("Invalid response from getaddrinfo");
if (result)
freeaddrinfo(result);
return IP_Address();
};
IP_Address ip = _sockaddr2ip(result->ai_addr);
freeaddrinfo(result);
return ip;
}
#if defined(WINDOWS_ENABLED)
#if defined(UWP_ENABLED)
void IP_Unix::get_local_interfaces(Map<String, Interface_Info> *r_interfaces) const {
using namespace Windows::Networking;
using namespace Windows::Networking::Connectivity;
// Returns addresses, not interfaces.
auto hostnames = NetworkInformation::GetHostNames();
for (int i = 0; i < hostnames->Size; i++) {
auto hostname = hostnames->GetAt(i);
if (hostname->Type != HostNameType::Ipv4 && hostname->Type != HostNameType::Ipv6)
continue;
String name = hostname->RawName->Data();
Map<String, Interface_Info>::Element *E = r_interfaces->find(name);
if (!E) {
Interface_Info info;
info.name = name;
info.name_friendly = hostname->DisplayName->Data();
info.index = String::num_uint64(0);
E = r_interfaces->insert(name, info);
ERR_CONTINUE(!E);
}
Interface_Info &info = E->get();
IP_Address ip = IP_Address(hostname->CanonicalName->Data());
info.ip_addresses.push_front(ip);
}
}
#else
void IP_Unix::get_local_interfaces(Map<String, Interface_Info> *r_interfaces) const {
ULONG buf_size = 1024;
IP_ADAPTER_ADDRESSES *addrs;
while (true) {
addrs = (IP_ADAPTER_ADDRESSES *)memalloc(buf_size);
int err = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME,
NULL, addrs, &buf_size);
if (err == NO_ERROR) {
break;
};
memfree(addrs);
if (err == ERROR_BUFFER_OVERFLOW) {
continue; // will go back and alloc the right size
};
ERR_FAIL_MSG("Call to GetAdaptersAddresses failed with error " + itos(err) + ".");
};
IP_ADAPTER_ADDRESSES *adapter = addrs;
while (adapter != NULL) {
Interface_Info info;
info.name = adapter->AdapterName;
info.name_friendly = adapter->FriendlyName;
info.index = String::num_uint64(adapter->IfIndex);
IP_ADAPTER_UNICAST_ADDRESS *address = adapter->FirstUnicastAddress;
while (address != NULL) {
int family = address->Address.lpSockaddr->sa_family;
if (family != AF_INET && family != AF_INET6)
continue;
info.ip_addresses.push_front(_sockaddr2ip(address->Address.lpSockaddr));
address = address->Next;
}
adapter = adapter->Next;
// Only add interface if it has at least one IP
if (info.ip_addresses.size() > 0)
r_interfaces->insert(info.name, info);
};
memfree(addrs);
};
#endif
#else // UNIX
void IP_Unix::get_local_interfaces(Map<String, Interface_Info> *r_interfaces) const {
struct ifaddrs *ifAddrStruct = nullptr;
struct ifaddrs *ifa = nullptr;
int family;
getifaddrs(&ifAddrStruct);
for (ifa = ifAddrStruct; ifa != nullptr; ifa = ifa->ifa_next) {
if (!ifa->ifa_addr)
continue;
family = ifa->ifa_addr->sa_family;
if (family != AF_INET && family != AF_INET6)
continue;
Map<String, Interface_Info>::Element *E = r_interfaces->find(ifa->ifa_name);
if (!E) {
Interface_Info info;
info.name = ifa->ifa_name;
info.name_friendly = ifa->ifa_name;
info.index = String::num_uint64(if_nametoindex(ifa->ifa_name));
E = r_interfaces->insert(ifa->ifa_name, info);
ERR_CONTINUE(!E);
}
Interface_Info &info = E->get();
info.ip_addresses.push_front(_sockaddr2ip(ifa->ifa_addr));
}
if (ifAddrStruct != nullptr)
freeifaddrs(ifAddrStruct);
}
#endif
void IP_Unix::make_default() {
_create = _create_unix;
}
IP *IP_Unix::_create_unix() {
return memnew(IP_Unix);
}
IP_Unix::IP_Unix() {
}
#endif
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