1 files changed, 113 insertions, 0 deletions
diff --git a/Swiften/Network/NATPMPInterface.cpp b/Swiften/Network/NATPMPInterface.cpp
new file mode 100644
index 0000000..298240a
--- /dev/null
+++ b/Swiften/Network/NATPMPInterface.cpp
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2011 Tobias Markmann
+ * Licensed under the simplified BSD license.
+ * See Documentation/Licenses/BSD-simplified.txt for more information.
+ */
+
+#include <Swiften/Network/NATPMPInterface.h>
+
+#include <Swiften/Base/Log.h>
+
+#pragma GCC diagnostic ignored "-Wold-style-cast"
+
+namespace Swift {
+
+NATPMPInterface::NATPMPInterface() {
+	initnatpmp(&natpmp, 0, 0);
+}
+
+NATPMPInterface::~NATPMPInterface() {
+	closenatpmp(&natpmp);
+}
+
+bool NATPMPInterface::isAvailable() {
+	return getPublicIP();
+}
+
+boost::optional<HostAddress> NATPMPInterface::getPublicIP() {
+	if (sendpublicaddressrequest(&natpmp) < 0) {
+		SWIFT_LOG(debug) << "Failed to send NAT-PMP public address request!" << std::endl;
+		return boost::optional<HostAddress>();
+	}
+
+	int r = 0;
+	natpmpresp_t response;
+	do {
+	  fd_set fds;
+	  struct timeval timeout;
+	  FD_ZERO(&fds);
+	  FD_SET(natpmp.s, &fds);
+	  getnatpmprequesttimeout(&natpmp, &timeout);
+	  select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
+	  r = readnatpmpresponseorretry(&natpmp, &response);
+	} while (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." << std::endl;
+		return boost::optional<HostAddress>();
+	}
+}
+
+boost::optional<NATPortMapping> NATPMPInterface::addPortForward(int localPort, int publicPort) {
+	NATPortMapping mapping(localPort, publicPort, NATPortMapping::TCP);
+	if (sendnewportmappingrequest(&natpmp, mapping.protocol == NATPortMapping::TCP ? NATPMP_PROTOCOL_TCP : NATPMP_PROTOCOL_UDP, mapping.leaseInSeconds, mapping.publicPort, mapping.localPort) < 0) {
+			SWIFT_LOG(debug) << "Failed to send NAT-PMP port forwarding request!" << std::endl;
+			return boost::optional<NATPortMapping>();
+	}
+
+	int r = 0;
+	natpmpresp_t response;
+	do {
+		fd_set fds;
+		struct timeval timeout;
+		FD_ZERO(&fds);
+		FD_SET(natpmp.s, &fds);
+		getnatpmprequesttimeout(&natpmp, &timeout);
+		select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
+		r = readnatpmpresponseorretry(&natpmp, &response);
+	} while(r == NATPMP_TRYAGAIN);
+
+	if (r == 0) {
+		mapping.localPort = response.pnu.newportmapping.privateport;
+		mapping.publicPort = response.pnu.newportmapping.mappedpublicport;
+		mapping.leaseInSeconds = response.pnu.newportmapping.lifetime;
+		return mapping;
+	}
+	else {
+		SWIFT_LOG(debug) << "Invalid NAT-PMP response." << std::endl;
+		return boost::optional<NATPortMapping>();
+	}
+}
+
+bool NATPMPInterface::removePortForward(const NATPortMapping& mapping) {
+	if (sendnewportmappingrequest(&natpmp, mapping.protocol == NATPortMapping::TCP ? NATPMP_PROTOCOL_TCP : NATPMP_PROTOCOL_UDP, 0, 0, mapping.localPort) < 0) {
+		SWIFT_LOG(debug) << "Failed to send NAT-PMP remove forwarding request!" << std::endl;
+		return false;
+	}
+
+	int r = 0;
+	natpmpresp_t response;
+	do {
+	  fd_set fds;
+	  struct timeval timeout;
+	  FD_ZERO(&fds);
+	  FD_SET(natpmp.s, &fds);
+	  getnatpmprequesttimeout(&natpmp, &timeout);
+	  select(FD_SETSIZE, &fds, NULL, NULL, &timeout);
+	  r = readnatpmpresponseorretry(&natpmp, &response);
+	} while(r == NATPMP_TRYAGAIN);
+
+	if (r == 0) {
+		return true;
+	}
+	else {
+		SWIFT_LOG(debug) << "Invalid NAT-PMP response." << std::endl;
+		return false;
+	}
+}
+
+
+}