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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);
}
/* uses real hostname instead of localhost */
static HostAndPort Me();
bool operator<(const HostAndPort& r) const {
if( _host < r._host )
return true;
if( _host == r._host )
return port() < r.port();
return false;
}
bool operator==(const HostAndPort& r) const {
return _host == r._host && port() == r.port();
}
bool operator!=(const HostAndPort& r) const {
return _host != r._host || port() != r.port();
}
/* returns true if the host/port combo identifies this process instance. */
bool isSelf() const; // defined in message.cpp
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::DefaultDBPort; }
bool hasPort() const { return _port >= 0; }
void setPort( int port ) { _port = 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", "nyc1.acme", and "nyc1.acme.com" are treated as the same.
*/
inline bool sameHostname(const string& a, const string& b) {
size_t prefixLen = str::shareCommonPrefix(a.c_str(), b.c_str());
if (prefixLen == a.size()) { // (a == b) or (a isPrefixOf b)
if ( b[prefixLen] == '.' || b[prefixLen] == '\0')
return true;
}
else if(prefixLen == b.size()) { // (b isPrefixOf a)
if ( a[prefixLen] == '.') // can't be '\0'
return true;
}
return false;
}
inline HostAndPort HostAndPort::Me() {
const char* ips = cmdLine.bind_ip.c_str();
while(*ips) {
string ip;
const char * comma = strchr(ips, ',');
if (comma) {
ip = string(ips, comma - ips);
ips = comma + 1;
}
else {
ip = string(ips);
ips = "";
}
HostAndPort h = HostAndPort(ip, cmdLine.port);
if (!h.isLocalHost()) {
return h;
}
}
string h = getHostName();
assert( !h.empty() );
assert( h != "localhost" );
return HostAndPort(h, cmdLine.port);
}
inline string HostAndPort::toString() const {
stringstream ss;
ss << _host;
if ( _port != -1 ) {
ss << ':';
#if defined(_DEBUG)
if( _port >= 44000 && _port < 44100 ) {
log() << "warning: special debug port 44xxx used" << endl;
ss << _port+1;
}
else
ss << _port;
#else
ss << _port;
#endif
}
return ss.str();
}
inline bool HostAndPort::isLocalHost() const {
return _host == "localhost" || startsWith(_host.c_str(), "127.") || _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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