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/* Copyright 2018 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kNetwork
#include "mongo/platform/basic.h"
#include "mongo/util/net/socket_utils.h"
#if !defined(_WIN32)
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <poll.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#if defined(__OpenBSD__)
#include <sys/uio.h>
#endif
#else
#include <mstcpip.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "mongo/db/server_options.h"
#include "mongo/util/concurrency/value.h"
#include "mongo/util/errno_util.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/net/sockaddr.h"
#include "mongo/util/quick_exit.h"
#include "mongo/util/winutil.h"
namespace mongo {
#if defined(_WIN32)
const struct WinsockInit {
WinsockInit() {
WSADATA d;
if (WSAStartup(MAKEWORD(2, 2), &d) != 0) {
log() << "ERROR: wsastartup failed " << errnoWithDescription();
quickExit(EXIT_NTSERVICE_ERROR);
}
}
} winsock_init;
#endif
static bool ipv6 = false;
void enableIPv6(bool state) {
ipv6 = state;
}
bool IPv6Enabled() {
return ipv6;
}
#ifdef _WIN32
#ifdef _UNICODE
#define X_STR_CONST(str) (L##str)
#else
#define X_STR_CONST(str) (str)
#endif
const CString kKeepAliveGroup(
X_STR_CONST("SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"));
const CString kKeepAliveTime(X_STR_CONST("KeepAliveTime"));
const CString kKeepAliveInterval(X_STR_CONST("KeepAliveInterval"));
#undef X_STR_CONST
#endif
void setSocketKeepAliveParams(int sock,
unsigned int maxKeepIdleSecs,
unsigned int maxKeepIntvlSecs) {
#ifdef _WIN32
// Defaults per MSDN when registry key does not exist.
// Expressed in seconds here to be consistent with posix,
// though Windows uses milliseconds.
const DWORD kWindowsKeepAliveTimeSecsDefault = 2 * 60 * 60;
const DWORD kWindowsKeepAliveIntervalSecsDefault = 1;
const auto getKey = [](const CString& key, DWORD default_value) {
auto withval = windows::getDWORDRegistryKey(kKeepAliveGroup, key);
if (withval.isOK()) {
auto val = withval.getValue();
// Return seconds
return val ? (val.get() / 1000) : default_value;
}
error() << "can't get KeepAlive parameter: " << withval.getStatus();
return default_value;
};
const auto keepIdleSecs = getKey(kKeepAliveTime, kWindowsKeepAliveTimeSecsDefault);
const auto keepIntvlSecs = getKey(kKeepAliveInterval, kWindowsKeepAliveIntervalSecsDefault);
if ((keepIdleSecs > maxKeepIdleSecs) || (keepIntvlSecs > maxKeepIntvlSecs)) {
DWORD sent = 0;
struct tcp_keepalive keepalive;
keepalive.onoff = TRUE;
keepalive.keepalivetime = std::min<DWORD>(keepIdleSecs, maxKeepIdleSecs) * 1000;
keepalive.keepaliveinterval = std::min<DWORD>(keepIntvlSecs, maxKeepIntvlSecs) * 1000;
if (WSAIoctl(sock,
SIO_KEEPALIVE_VALS,
&keepalive,
sizeof(keepalive),
nullptr,
0,
&sent,
nullptr,
nullptr)) {
error() << "failed setting keepalive values: " << WSAGetLastError();
}
}
#elif defined(__APPLE__) || defined(__linux__)
const auto updateSockOpt =
[sock](int level, int optnum, unsigned int maxval, StringData optname) {
unsigned int optval = 1;
socklen_t len = sizeof(optval);
if (getsockopt(sock, level, optnum, (char*)&optval, &len)) {
error() << "can't get " << optname << ": " << errnoWithDescription();
}
if (optval > maxval) {
optval = maxval;
if (setsockopt(sock, level, optnum, (char*)&optval, sizeof(optval))) {
error() << "can't set " << optname << ": " << errnoWithDescription();
}
}
};
#ifdef __APPLE__
updateSockOpt(IPPROTO_TCP, TCP_KEEPALIVE, maxKeepIdleSecs, "TCP_KEEPALIVE");
#endif
#ifdef __linux__
#ifdef SOL_TCP
const int level = SOL_TCP;
#else
const int level = SOL_SOCKET;
#endif
updateSockOpt(level, TCP_KEEPIDLE, maxKeepIdleSecs, "TCP_KEEPIDLE");
updateSockOpt(level, TCP_KEEPINTVL, maxKeepIntvlSecs, "TCP_KEEPINTVL");
#endif
#endif
}
std::string makeUnixSockPath(int port) {
return mongoutils::str::stream() << serverGlobalParams.socket << "/mongodb-" << port << ".sock";
}
// If an ip address is passed in, just return that. If a hostname is passed
// in, look up its ip and return that. Returns "" on failure.
std::string hostbyname(const char* hostname) {
SockAddr sockAddr(hostname, 0, IPv6Enabled() ? AF_UNSPEC : AF_INET);
if (!sockAddr.isValid() || sockAddr.getAddr() == "0.0.0.0")
return "";
else
return sockAddr.getAddr();
}
// --- my --
DiagStr& _hostNameCached = *(new DiagStr); // this is also written to from commands/cloud.cpp
std::string getHostName() {
char buf[256];
int ec = gethostname(buf, 127);
if (ec || *buf == 0) {
log() << "can't get this server's hostname " << errnoWithDescription();
return "";
}
return buf;
}
/** we store our host name once */
std::string getHostNameCached() {
std::string temp = _hostNameCached.get();
if (_hostNameCached.empty()) {
temp = getHostName();
_hostNameCached = temp;
}
return temp;
}
std::string getHostNameCachedAndPort() {
return str::stream() << getHostNameCached() << ':' << serverGlobalParams.port;
}
std::string prettyHostName() {
return (serverGlobalParams.port == ServerGlobalParams::DefaultDBPort
? getHostNameCached()
: getHostNameCachedAndPort());
}
} // namespace mongo
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