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// hostandport.h
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "sock.h"
#include "../db/cmdline.h"
#include "mongoutils/str.h"
namespace mongo {
using namespace mongoutils;
/** helper for manipulating host:port connection endpoints.
*/
struct HostAndPort {
HostAndPort() : _port(-1) { }
/** From a string hostname[:portnumber]
Throws user assertion if bad config string or bad port #.
*/
HostAndPort(string s);
/** @param p port number. -1 is ok to use default. */
HostAndPort(string h, int p /*= -1*/) : _host(h), _port(p) { }
HostAndPort(const SockAddr& sock )
: _host( sock.getAddr() ) , _port( sock.getPort() ){
}
static HostAndPort me() {
return HostAndPort("localhost", cmdLine.port);
}
bool operator<(const HostAndPort& r) const { return _host < r._host || (_host==r._host&&_port<r._port); }
/* returns true if the host/port combo identifies this process instance. */
bool isSelf() const;
bool isLocalHost() const;
// @returns host:port
string toString() const;
operator string() const { return toString(); }
string host() const { return _host; }
int port() const { return _port >= 0 ? _port : cmdLine.port; }
private:
// invariant (except full obj assignment):
string _host;
int _port; // -1 indicates unspecified
};
/** returns true if strings seem to be the same hostname.
"nyc1" and "nyc1.acme.com" are treated as the same.
in fact "nyc1.foo.com" and "nyc1.acme.com" are treated the same -
we oly look up to the first period.
*/
inline bool sameHostname(const string& a, const string& b) {
return str::before(a, '.') == str::before(b, '.');
}
inline bool HostAndPort::isSelf() const {
int p = _port == -1 ? CmdLine::DefaultDBPort : _port;
if( p != cmdLine.port )
return false;
return sameHostname(getHostName(), _host) || isLocalHost();
}
inline string HostAndPort::toString() const {
stringstream ss;
ss << _host;
if( _port != -1 ) ss << ':' << _port;
return ss.str();
}
inline bool HostAndPort::isLocalHost() const {
return _host == "localhost" || _host == "127.0.0.1" || _host == "::1";
}
inline HostAndPort::HostAndPort(string s) {
const char *p = s.c_str();
uassert(13110, "HostAndPort: bad config string", *p);
const char *colon = strrchr(p, ':');
if( colon ) {
int port = atoi(colon+1);
uassert(13095, "HostAndPort: bad port #", port > 0);
_host = string(p,colon-p);
_port = port;
}
else {
// no port specified.
_host = p;
_port = -1;
}
}
}
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