tdlight/tdutils/td/utils/port/IPAddress.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/utils/port/IPAddress.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/port/SocketFd.h"
#include "td/utils/port/thread_local.h"
#include "td/utils/ScopeGuard.h"
#if !TD_WINDOWS
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <sys/types.h>
#endif
#include <cstring>
namespace td {
IPAddress::IPAddress() : is_valid_(false) {
}
bool IPAddress::is_valid() const {
return is_valid_;
}
const sockaddr *IPAddress::get_sockaddr() const {
return &sockaddr_;
}
size_t IPAddress::get_sockaddr_len() const {
CHECK(is_valid());
switch (addr_.ss_family) {
case AF_INET6:
return sizeof(ipv6_addr_);
case AF_INET:
return sizeof(ipv4_addr_);
default:
UNREACHABLE("Unknown address family");
}
}
int IPAddress::get_address_family() const {
return get_sockaddr()->sa_family;
}
bool IPAddress::is_ipv4() const {
return get_address_family() == AF_INET;
}
uint32 IPAddress::get_ipv4() const {
CHECK(is_valid());
CHECK(is_ipv4());
return ipv4_addr_.sin_addr.s_addr;
}
Slice IPAddress::get_ipv6() const {
static_assert(sizeof(ipv6_addr_.sin6_addr) == 16, "ipv6 size == 16");
CHECK(is_valid());
CHECK(!is_ipv4());
return Slice(ipv6_addr_.sin6_addr.s6_addr, 16);
}
IPAddress IPAddress::get_any_addr() const {
IPAddress res;
switch (get_address_family()) {
case AF_INET6:
res.init_ipv6_any();
break;
case AF_INET:
res.init_ipv4_any();
break;
default:
UNREACHABLE("Unknown address family");
}
return res;
}
void IPAddress::init_ipv4_any() {
is_valid_ = true;
ipv4_addr_.sin_family = AF_INET;
ipv4_addr_.sin_addr.s_addr = INADDR_ANY;
ipv4_addr_.sin_port = 0;
}
void IPAddress::init_ipv6_any() {
is_valid_ = true;
ipv6_addr_.sin6_family = AF_INET6;
ipv6_addr_.sin6_addr = in6addr_any;
ipv6_addr_.sin6_port = 0;
}
Status IPAddress::init_ipv6_port(CSlice ipv6, int port) {
is_valid_ = false;
if (port <= 0 || port >= (1 << 16)) {
return Status::Error(PSLICE() << "Invalid [port=" << port << "]");
}
std::memset(&ipv6_addr_, 0, sizeof(ipv6_addr_));
ipv6_addr_.sin6_family = AF_INET6;
ipv6_addr_.sin6_port = htons(static_cast<uint16>(port));
int err = inet_pton(AF_INET6, ipv6.c_str(), &ipv6_addr_.sin6_addr);
if (err == 0) {
return Status::Error(PSLICE() << "Failed inet_pton(AF_INET6, " << ipv6 << ")");
} else if (err == -1) {
return OS_SOCKET_ERROR(PSLICE() << "Failed inet_pton(AF_INET6, " << ipv6 << ")");
}
is_valid_ = true;
return Status::OK();
}
Status IPAddress::init_ipv6_as_ipv4_port(CSlice ipv4, int port) {
return init_ipv6_port(string("::FFFF:").append(ipv4.begin(), ipv4.size()), port);
}
Status IPAddress::init_ipv4_port(CSlice ipv4, int port) {
is_valid_ = false;
if (port <= 0 || port >= (1 << 16)) {
return Status::Error(PSLICE() << "Invalid [port=" << port << "]");
}
std::memset(&ipv4_addr_, 0, sizeof(ipv4_addr_));
ipv4_addr_.sin_family = AF_INET;
ipv4_addr_.sin_port = htons(static_cast<uint16>(port));
int err = inet_pton(AF_INET, ipv4.c_str(), &ipv4_addr_.sin_addr);
if (err == 0) {
return Status::Error(PSLICE() << "Failed inet_pton(AF_INET, " << ipv4 << ")");
} else if (err == -1) {
return OS_SOCKET_ERROR(PSLICE() << "Failed inet_pton(AF_INET, " << ipv4 << ")");
}
is_valid_ = true;
return Status::OK();
}
Status IPAddress::init_host_port(CSlice host, int port) {
auto str_port = to_string(port);
return init_host_port(host, str_port);
}
Status IPAddress::init_host_port(CSlice host, CSlice port) {
addrinfo hints;
addrinfo *info = nullptr;
std::memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET; // TODO AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
LOG(INFO) << "Try to init ipv4 address " << host << " with port " << port;
auto s = getaddrinfo(host.c_str(), port.c_str(), &hints, &info);
if (s != 0) {
return Status::Error(PSLICE() << "getaddrinfo: " << gai_strerror(s));
}
SCOPE_EXIT {
freeaddrinfo(info);
};
// prefer ipv4
addrinfo *best_info = info;
for (auto *ptr = info->ai_next; ptr != nullptr; ptr = ptr->ai_next) {
if (ptr->ai_socktype == AF_INET) {
best_info = ptr;
break;
}
}
// just use first address
CHECK(best_info != nullptr);
return init_sockaddr(best_info->ai_addr, narrow_cast<socklen_t>(best_info->ai_addrlen));
}
Status IPAddress::init_host_port(CSlice host_port) {
auto pos = host_port.rfind(':');
if (pos == static_cast<size_t>(-1)) {
return Status::Error("Can't split string into host and port");
}
return init_host_port(host_port.substr(0, pos).str(), host_port.substr(pos + 1).str());
}
Status IPAddress::init_sockaddr(sockaddr *addr, socklen_t len) {
if (addr->sa_family == AF_INET6) {
CHECK(len == sizeof(ipv6_addr_));
std::memcpy(&ipv6_addr_, reinterpret_cast<sockaddr_in6 *>(addr), sizeof(ipv6_addr_));
LOG(INFO) << "Have ipv6 address " << get_ip_str() << " with port " << get_port();
} else if (addr->sa_family == AF_INET) {
CHECK(len == sizeof(ipv4_addr_));
std::memcpy(&ipv4_addr_, reinterpret_cast<sockaddr_in *>(addr), sizeof(ipv4_addr_));
LOG(INFO) << "Have ipv4 address " << get_ip_str() << " with port " << get_port();
} else {
return Status::Error(PSLICE() << "Unknown " << tag("sa_family", addr->sa_family));
}
is_valid_ = true;
return Status::OK();
}
Status IPAddress::init_socket_address(const SocketFd &socket_fd) {
is_valid_ = false;
#if TD_WINDOWS
auto fd = socket_fd.get_fd().get_native_socket();
#else
auto fd = socket_fd.get_fd().get_native_fd();
#endif
socklen_t len = sizeof(addr_);
int ret = getsockname(fd, &sockaddr_, &len);
if (ret != 0) {
return OS_SOCKET_ERROR("Failed to get socket address");
}
is_valid_ = true;
return Status::OK();
}
Status IPAddress::init_peer_address(const SocketFd &socket_fd) {
is_valid_ = false;
#if TD_WINDOWS
auto fd = socket_fd.get_fd().get_native_socket();
#else
auto fd = socket_fd.get_fd().get_native_fd();
#endif
socklen_t len = sizeof(addr_);
int ret = getpeername(fd, &sockaddr_, &len);
if (ret != 0) {
return OS_SOCKET_ERROR("Failed to get peer socket address");
}
is_valid_ = true;
return Status::OK();
}
static CSlice get_ip_str(int family, const void *addr) {
const int buf_size = INET6_ADDRSTRLEN; //, INET_ADDRSTRLEN;
static TD_THREAD_LOCAL char *buf;
init_thread_local<char[]>(buf, buf_size);
const char *res = inet_ntop(family,
#if TD_WINDOWS
const_cast<PVOID>(addr),
#else
addr,
#endif
buf, buf_size);
if (res == nullptr) {
return CSlice();
} else {
return CSlice(res);
}
}
CSlice IPAddress::ipv4_to_str(int32 ipv4) {
auto tmp_ipv4 = ntohl(ipv4);
return ::td::get_ip_str(AF_INET, &tmp_ipv4);
}
Slice IPAddress::get_ip_str() const {
if (!is_valid()) {
return Slice("0.0.0.0");
}
const void *addr;
switch (get_address_family()) {
case AF_INET6:
addr = &ipv6_addr_.sin6_addr;
break;
case AF_INET:
addr = &ipv4_addr_.sin_addr;
break;
default:
UNREACHABLE();
return Slice();
}
return ::td::get_ip_str(get_address_family(), addr);
}
int IPAddress::get_port() const {
if (!is_valid()) {
return 0;
}
switch (get_address_family()) {
case AF_INET6:
return ntohs(ipv6_addr_.sin6_port);
case AF_INET:
return ntohs(ipv4_addr_.sin_port);
default:
UNREACHABLE();
return 0;
}
}
void IPAddress::set_port(int port) {
CHECK(is_valid());
switch (get_address_family()) {
case AF_INET6:
ipv6_addr_.sin6_port = htons(static_cast<uint16>(port));
break;
case AF_INET:
ipv4_addr_.sin_port = htons(static_cast<uint16>(port));
break;
default:
UNREACHABLE();
}
}
bool operator==(const IPAddress &a, const IPAddress &b) {
if (!a.is_valid() || !b.is_valid()) {
return false;
}
if (a.get_address_family() != b.get_address_family()) {
return false;
}
if (a.get_address_family() == AF_INET) {
return a.ipv4_addr_.sin_port == b.ipv4_addr_.sin_port &&
std::memcmp(&a.ipv4_addr_.sin_addr, &b.ipv4_addr_.sin_addr, sizeof(a.ipv4_addr_.sin_addr)) == 0;
} else if (a.get_address_family() == AF_INET6) {
return a.ipv6_addr_.sin6_port == b.ipv6_addr_.sin6_port &&
std::memcmp(&a.ipv6_addr_.sin6_addr, &b.ipv6_addr_.sin6_addr, sizeof(a.ipv6_addr_.sin6_addr)) == 0;
}
UNREACHABLE("Unknown address family");
return false;
}
bool operator<(const IPAddress &a, const IPAddress &b) {
if (a.is_valid() != b.is_valid()) {
return a.is_valid() < b.is_valid();
}
if (a.get_address_family() != b.get_address_family()) {
return a.get_address_family() < b.get_address_family();
}
if (a.get_address_family() == AF_INET) {
if (a.ipv4_addr_.sin_port != b.ipv4_addr_.sin_port) {
return a.ipv4_addr_.sin_port < b.ipv4_addr_.sin_port;
}
return std::memcmp(&a.ipv4_addr_.sin_addr, &b.ipv4_addr_.sin_addr, sizeof(a.ipv4_addr_.sin_addr)) < 0;
} else if (a.get_address_family() == AF_INET6) {
if (a.ipv6_addr_.sin6_port != b.ipv6_addr_.sin6_port) {
return a.ipv6_addr_.sin6_port < b.ipv6_addr_.sin6_port;
}
return std::memcmp(&a.ipv6_addr_.sin6_addr, &b.ipv6_addr_.sin6_addr, sizeof(a.ipv6_addr_.sin6_addr)) < 0;
}
UNREACHABLE("Unknown address family");
return false;
}
StringBuilder &operator<<(StringBuilder &builder, const IPAddress &address) {
if (!address.is_valid()) {
return builder << "[invalid]";
}
if (address.get_address_family() == AF_INET) {
return builder << "[" << address.get_ip_str() << ":" << address.get_port() << "]";
} else {
CHECK(address.get_address_family() == AF_INET6);
return builder << "[[" << address.get_ip_str() << "]:" << address.get_port() << "]";
}
}
} // namespace td