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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/util/net/hostandport.h"
#include <boost/functional/hash.hpp>
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/server_options.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/stringutils.h"
namespace mongo {
StatusWith<HostAndPort> HostAndPort::parse(StringData text) {
HostAndPort result;
Status status = result.initialize(text);
if (!status.isOK()) {
return StatusWith<HostAndPort>(status);
}
return StatusWith<HostAndPort>(result);
}
HostAndPort::HostAndPort() : _port(-1) {}
HostAndPort::HostAndPort(StringData text) {
uassertStatusOK(initialize(text));
}
HostAndPort::HostAndPort(const std::string& h, int p) : _host(h), _port(p) {}
HostAndPort::HostAndPort(SockAddr addr) : _addr(std::move(addr)) {
uassertStatusOK(initialize(_addr->toString(true)));
}
bool HostAndPort::operator<(const HostAndPort& r) const {
const int cmp = host().compare(r.host());
if (cmp)
return cmp < 0;
return port() < r.port();
}
bool HostAndPort::operator==(const HostAndPort& r) const {
return host() == r.host() && port() == r.port();
}
int HostAndPort::port() const {
if (hasPort())
return _port;
return ServerGlobalParams::DefaultDBPort;
}
bool HostAndPort::isLocalHost() const {
return (_host == "localhost" || str::startsWith(_host.c_str(), "127.") || _host == "::1" ||
_host == "anonymous unix socket" || _host.c_str()[0] == '/' // unix socket
);
}
bool HostAndPort::isDefaultRoute() const {
if (_host == "0.0.0.0") {
return true;
}
// There are multiple ways to write IPv6 addresses.
// We're looking for any representation of the address "0:0:0:0:0:0:0:0".
// A single sequence of "0" bytes in an IPv6 address may be represented as "::",
// so we must also match addresses like "::" or "0::0:0".
// Return false if a character other than ':' or '0' is contained in the address.
auto firstNonDefaultIPv6Char =
std::find_if(std::begin(_host), std::end(_host), [](const char& c) {
return c != ':' && c != '0' && c != '[' && c != ']';
});
return firstNonDefaultIPv6Char == std::end(_host);
}
std::string HostAndPort::toString() const {
StringBuilder ss;
append(ss);
return ss.str();
}
void HostAndPort::append(StringBuilder& ss) const {
// wrap ipv6 addresses in []s for roundtrip-ability
if (host().find(':') != std::string::npos) {
ss << '[' << host() << ']';
} else {
ss << host();
}
if (host().find('/') == std::string::npos) {
ss << ':' << port();
}
}
bool HostAndPort::empty() const {
return _host.empty() && _port < 0;
}
Status HostAndPort::initialize(StringData s) {
size_t colonPos = s.rfind(':');
StringData hostPart = s.substr(0, colonPos);
// handle ipv6 hostPart (which we require to be wrapped in []s)
const size_t openBracketPos = s.find('[');
const size_t closeBracketPos = s.find(']');
if (openBracketPos != std::string::npos) {
if (openBracketPos != 0) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "'[' present, but not first character in "
<< s.toString());
}
if (closeBracketPos == std::string::npos) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "ipv6 address is missing closing ']' in hostname in "
<< s.toString());
}
hostPart = s.substr(openBracketPos + 1, closeBracketPos - openBracketPos - 1);
// prevent accidental assignment of port to the value of the final portion of hostPart
if (colonPos < closeBracketPos) {
// If the last colon is inside the brackets, then there must not be a port.
if (s.size() != closeBracketPos + 1) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "missing colon after ']' before the port in "
<< s.toString());
}
colonPos = std::string::npos;
} else if (colonPos != closeBracketPos + 1) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "Extraneous characters between ']' and pre-port ':'"
<< " in "
<< s.toString());
}
} else if (closeBracketPos != std::string::npos) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "']' present without '[' in " << s.toString());
} else if (s.find(':') != colonPos) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "More than one ':' detected. If this is an ipv6 address,"
<< " it needs to be surrounded by '[' and ']'; "
<< s.toString());
}
if (hostPart.empty()) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "Empty host component parsing HostAndPort from \""
<< escape(s.toString())
<< "\"");
}
int port;
if (colonPos != std::string::npos) {
const StringData portPart = s.substr(colonPos + 1);
Status status = parseNumberFromStringWithBase(portPart, 10, &port);
if (!status.isOK()) {
return status;
}
if (port <= 0 || port > 65535) {
return Status(ErrorCodes::FailedToParse,
str::stream() << "Port number " << port
<< " out of range parsing HostAndPort from \""
<< escape(s.toString())
<< "\"");
}
} else {
port = -1;
}
_host = hostPart.toString();
_port = port;
return Status::OK();
}
std::ostream& operator<<(std::ostream& os, const HostAndPort& hp) {
return os << hp.toString();
}
template <typename Allocator>
StringBuilderImpl<Allocator>& operator<<(StringBuilderImpl<Allocator>& os, const HostAndPort& hp) {
return os << hp.toString();
}
template StringBuilderImpl<StackAllocator>& operator<<(StringBuilderImpl<StackAllocator>&,
const HostAndPort&);
template StringBuilderImpl<SharedBufferAllocator>& operator<<(
StringBuilderImpl<SharedBufferAllocator>&, const HostAndPort&);
} // namespace mongo
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