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// isself.cpp
#include "pch.h"
#include "../../util/net/listen.h"
#include "../commands.h"
#include "../../client/dbclient.h"
#include "../security.h"
#ifndef _WIN32
# ifndef __sunos__
# include <ifaddrs.h>
# endif
# include <sys/resource.h>
# include <sys/stat.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <errno.h>
#include <netdb.h>
#ifdef __openbsd__
# include <sys/uio.h>
#endif
#endif
namespace mongo {
#if !defined(_WIN32) && !defined(__sunos__)
vector<string> getMyAddrs() {
ifaddrs * addrs;
int status = getifaddrs(&addrs);
massert(13469, "getifaddrs failure: " + errnoWithDescription(errno), status == 0);
vector<string> out;
// based on example code from linux getifaddrs manpage
for (ifaddrs * addr = addrs; addr != NULL; addr = addr->ifa_next) {
if ( addr->ifa_addr == NULL ) continue;
int family = addr->ifa_addr->sa_family;
char host[NI_MAXHOST];
if (family == AF_INET || family == AF_INET6) {
status = getnameinfo(addr->ifa_addr,
(family == AF_INET ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6)),
host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if ( status != 0 ) {
freeifaddrs( addrs );
addrs = NULL;
msgasserted( 13470, string("getnameinfo() failed: ") + gai_strerror(status) );
}
out.push_back(host);
}
}
freeifaddrs( addrs );
addrs = NULL;
if (logLevel >= 1) {
log(1) << "getMyAddrs():";
for (vector<string>::const_iterator it=out.begin(), end=out.end(); it!=end; ++it) {
log(1) << " [" << *it << ']';
}
log(1) << endl;
}
return out;
}
vector<string> getAllIPs(StringData iporhost) {
addrinfo* addrs = NULL;
addrinfo hints;
memset(&hints, 0, sizeof(addrinfo));
hints.ai_socktype = SOCK_STREAM;
hints.ai_family = (IPv6Enabled() ? AF_UNSPEC : AF_INET);
static string portNum = BSONObjBuilder::numStr(cmdLine.port);
vector<string> out;
int ret = getaddrinfo(iporhost.data(), portNum.c_str(), &hints, &addrs);
if ( ret ) {
warning() << "getaddrinfo(\"" << iporhost.data() << "\") failed: " << gai_strerror(ret) << endl;
return out;
}
for (addrinfo* addr = addrs; addr != NULL; addr = addr->ai_next) {
int family = addr->ai_family;
char host[NI_MAXHOST];
if (family == AF_INET || family == AF_INET6) {
int status = getnameinfo(addr->ai_addr, addr->ai_addrlen, host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
massert(13472, string("getnameinfo() failed: ") + gai_strerror(status), status == 0);
out.push_back(host);
}
}
freeaddrinfo(addrs);
if (logLevel >= 1) {
log(1) << "getallIPs(\"" << iporhost << "\"):";
for (vector<string>::const_iterator it=out.begin(), end=out.end(); it!=end; ++it) {
log(1) << " [" << *it << ']';
}
log(1) << endl;
}
return out;
}
#endif
class IsSelfCommand : public Command {
public:
IsSelfCommand() : Command("_isSelf") , _cacheLock( "IsSelfCommand::_cacheLock" ) {}
virtual bool slaveOk() const { return true; }
virtual LockType locktype() const { return NONE; }
virtual void help( stringstream &help ) const {
help << "{ _isSelf : 1 } INTERNAL ONLY";
}
bool run(const string& dbname, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool fromRepl ) {
init();
result.append( "id" , _id );
return true;
}
void init() {
scoped_lock lk( _cacheLock );
if ( ! _id.isSet() )
_id.init();
}
OID _id;
mongo::mutex _cacheLock;
map<string,bool> _cache;
} isSelfCommand;
bool HostAndPort::isSelf() const {
int p = _port == -1 ? CmdLine::DefaultDBPort : _port;
if( p != cmdLine.port ) {
// shortcut - ports have to match at the very least
return false;
}
string host = str::stream() << _host << ":" << p;
{
// check cache for this host
// debatably something _could_ change, but I'm not sure right now (erh 10/14/2010)
scoped_lock lk( isSelfCommand._cacheLock );
map<string,bool>::const_iterator i = isSelfCommand._cache.find( host );
if ( i != isSelfCommand._cache.end() )
return i->second;
}
#if !defined(_WIN32) && !defined(__sunos__)
// on linux and os x we can do a quick check for an ip match
const vector<string> myaddrs = getMyAddrs();
const vector<string> addrs = getAllIPs(_host);
for (vector<string>::const_iterator i=myaddrs.begin(), iend=myaddrs.end(); i!=iend; ++i) {
for (vector<string>::const_iterator j=addrs.begin(), jend=addrs.end(); j!=jend; ++j) {
string a = *i;
string b = *j;
if ( a == b ||
( str::startsWith( a , "127." ) && str::startsWith( b , "127." ) ) // 127. is all loopback
) {
// add to cache
scoped_lock lk( isSelfCommand._cacheLock );
isSelfCommand._cache[host] = true;
return true;
}
}
}
#endif
if ( ! Listener::getTimeTracker() ) {
// this ensures we are actually running a server
// this may return true later, so may want to retry
return false;
}
try {
isSelfCommand.init();
DBClientConnection conn;
string errmsg;
if ( ! conn.connect( host , errmsg ) ) {
// should this go in the cache?
return false;
}
if (!noauth && cmdLine.keyFile &&
!conn.auth("local", internalSecurity.user, internalSecurity.pwd, errmsg, false)) {
return false;
}
BSONObj out;
bool ok = conn.simpleCommand( "admin" , &out , "_isSelf" );
bool me = ok && out["id"].type() == jstOID && isSelfCommand._id == out["id"].OID();
// add to cache
scoped_lock lk( isSelfCommand._cacheLock );
isSelfCommand._cache[host] = me;
return me;
}
catch ( std::exception& e ) {
warning() << "could't check isSelf (" << host << ") " << e.what() << endl;
}
return false;
}
}
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