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/*
* Copyright (c) 2011 Tobias Markmann
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
/*
* Copyright (c) 2014-2019 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Network/NATPMPInterface.h>
#include <memory>
#include <Swiften/Base/Log.h>
// This has to be included after the previous headers, because of WIN32 macro
// being defined somewhere.
#include <natpmp.h>
#pragma GCC diagnostic ignored "-Wold-style-cast"
namespace Swift {
struct NATPMPInterface::Private {
natpmp_t natpmp;
};
NATPMPInterface::NATPMPInterface() : p(new Private()) {
initnatpmp(&p->natpmp, 0, 0);
}
NATPMPInterface::~NATPMPInterface() {
closenatpmp(&p->natpmp);
}
bool NATPMPInterface::isAvailable() {
return getPublicIP() ? true : false;
}
boost::optional<HostAddress> NATPMPInterface::getPublicIP() {
if (sendpublicaddressrequest(&p->natpmp) < 0) {
SWIFT_LOG(debug) << "Failed to send NAT-PMP public address request!";
return boost::optional<HostAddress>();
}
int r = 0;
natpmpresp_t response;
do {
fd_set fds;
struct timeval timeout;
FD_ZERO(&fds);
FD_SET(p->natpmp.s, &fds);
getnatpmprequesttimeout(&p->natpmp, &timeout);
// Limit NAT-PMP timeout to ten seconds.
timeout.tv_sec = 10;
timeout.tv_usec = 0;
select(FD_SETSIZE, &fds, nullptr, nullptr, &timeout);
r = readnatpmpresponseorretry(&p->natpmp, &response);
} while (false /*r == NATPMP_TRYAGAIN*/);
if (r == 0) {
return boost::optional<HostAddress>(HostAddress(reinterpret_cast<const unsigned char*>(&(response.pnu.publicaddress.addr)), 4));
}
else {
SWIFT_LOG(debug) << "Inavlid NAT-PMP response.";
return boost::optional<HostAddress>();
}
}
boost::optional<NATPortMapping> NATPMPInterface::addPortForward(unsigned short localPort, unsigned short publicPort) {
NATPortMapping mapping(localPort, publicPort, NATPortMapping::TCP);
if (sendnewportmappingrequest(
&p->natpmp,
mapping.getProtocol() == NATPortMapping::TCP ? NATPMP_PROTOCOL_TCP : NATPMP_PROTOCOL_UDP,
mapping.getLocalPort(),
mapping.getPublicPort(),
mapping.getLeaseInSeconds()) < 0) {
SWIFT_LOG(debug) << "Failed to send NAT-PMP port forwarding request!";
return boost::optional<NATPortMapping>();
}
int r = 0;
natpmpresp_t response;
do {
fd_set fds;
struct timeval timeout;
FD_ZERO(&fds);
FD_SET(p->natpmp.s, &fds);
getnatpmprequesttimeout(&p->natpmp, &timeout);
// Limit NAT-PMP timeout to ten seconds.
timeout.tv_sec = 10;
timeout.tv_usec = 0;
select(FD_SETSIZE, &fds, nullptr, nullptr, &timeout);
r = readnatpmpresponseorretry(&p->natpmp, &response);
} while(false /*r == NATPMP_TRYAGAIN*/);
if (r == 0) {
NATPortMapping result(response.pnu.newportmapping.privateport, response.pnu.newportmapping.mappedpublicport, NATPortMapping::TCP, response.pnu.newportmapping.lifetime);
return result;
}
else {
SWIFT_LOG(debug) << "Invalid NAT-PMP response.";
return boost::optional<NATPortMapping>();
}
}
bool NATPMPInterface::removePortForward(const NATPortMapping& mapping) {
if (sendnewportmappingrequest(&p->natpmp, mapping.getProtocol() == NATPortMapping::TCP ? NATPMP_PROTOCOL_TCP : NATPMP_PROTOCOL_UDP, mapping.getLocalPort(), 0, 0) < 0) {
SWIFT_LOG(debug) << "Failed to send NAT-PMP remove forwarding request!";
return false;
}
int r = 0;
natpmpresp_t response;
do {
fd_set fds;
struct timeval timeout;
FD_ZERO(&fds);
FD_SET(p->natpmp.s, &fds);
getnatpmprequesttimeout(&p->natpmp, &timeout);
select(FD_SETSIZE, &fds, nullptr, nullptr, &timeout);
r = readnatpmpresponseorretry(&p->natpmp, &response);
} while(r == NATPMP_TRYAGAIN);
if (r == 0) {
return true;
}
else {
SWIFT_LOG(debug) << "Invalid NAT-PMP response.";
return false;
}
}
}
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