forked from PurpleI2P/i2pd
/
UPnP.cpp
232 lines (210 loc) · 7.33 KB
/
UPnP.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
#ifdef USE_UPNP
#include <string>
#include <thread>
#include <boost/thread/thread.hpp>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#ifdef _WIN32
#include <windows.h>
#define dlsym GetProcAddress
#else
#include <dlfcn.h>
#endif
#include "Log.h"
#include "RouterContext.h"
#include "UPnP.h"
#include "NetDb.h"
#include "util.h"
#include "RouterInfo.h"
#include <miniupnpc/miniupnpc.h>
#include <miniupnpc/upnpcommands.h>
// These are per-process and are safe to reuse for all threads
decltype(upnpDiscover) *upnpDiscoverFunc;
decltype(UPNP_AddPortMapping) *UPNP_AddPortMappingFunc;
decltype(UPNP_GetValidIGD) *UPNP_GetValidIGDFunc;
decltype(UPNP_GetExternalIPAddress) *UPNP_GetExternalIPAddressFunc;
decltype(UPNP_DeletePortMapping) *UPNP_DeletePortMappingFunc;
decltype(freeUPNPDevlist) *freeUPNPDevlistFunc;
decltype(FreeUPNPUrls) *FreeUPNPUrlsFunc;
// Nice approach http://stackoverflow.com/a/21517513/673826
template<class M, typename F>
F GetKnownProcAddressImpl(M hmod, const char *name, F) {
auto proc = reinterpret_cast<F>(dlsym(hmod, name));
if (!proc) {
LogPrint(eLogError, "UPnP: Error resolving ", name, " from library, version mismatch?");
}
return proc;
}
#define GetKnownProcAddress(hmod, func) GetKnownProcAddressImpl(hmod, #func, func##Func);
namespace i2p
{
namespace transport
{
UPnP::UPnP () : m_Thread (nullptr) , m_IsModuleLoaded (false)
{
}
void UPnP::Stop ()
{
if (m_Thread)
{
m_Thread->join ();
delete m_Thread;
m_Thread = nullptr;
}
}
void UPnP::Start()
{
if (!m_IsModuleLoaded) {
#ifdef MAC_OSX
m_Module = dlopen ("libminiupnpc.dylib", RTLD_LAZY);
#elif _WIN32
m_Module = LoadLibrary ("miniupnpc.dll"); // official prebuilt binary, e.g., in upnpc-exe-win32-20140422.zip
#else
m_Module = dlopen ("libminiupnpc.so", RTLD_LAZY);
#endif
if (m_Module == NULL)
{
LogPrint (eLogError, "UPnP: Error loading UPNP library, version mismatch?");
return;
}
else
{
upnpDiscoverFunc = GetKnownProcAddress (m_Module, upnpDiscover);
UPNP_GetValidIGDFunc = GetKnownProcAddress (m_Module, UPNP_GetValidIGD);
UPNP_GetExternalIPAddressFunc = GetKnownProcAddress (m_Module, UPNP_GetExternalIPAddress);
UPNP_AddPortMappingFunc = GetKnownProcAddress (m_Module, UPNP_AddPortMapping);
UPNP_DeletePortMappingFunc = GetKnownProcAddress (m_Module, UPNP_DeletePortMapping);
freeUPNPDevlistFunc = GetKnownProcAddress (m_Module, freeUPNPDevlist);
FreeUPNPUrlsFunc = GetKnownProcAddress (m_Module, FreeUPNPUrls);
if (upnpDiscoverFunc && UPNP_GetValidIGDFunc && UPNP_GetExternalIPAddressFunc && UPNP_AddPortMappingFunc &&
UPNP_DeletePortMappingFunc && freeUPNPDevlistFunc && FreeUPNPUrlsFunc)
m_IsModuleLoaded = true;
}
}
m_Thread = new std::thread (std::bind (&UPnP::Run, this));
}
UPnP::~UPnP ()
{
}
void UPnP::Run ()
{
const std::vector<std::shared_ptr<i2p::data::RouterInfo::Address> > a = context.GetRouterInfo().GetAddresses();
for (auto address : a)
{
if (!address->host.is_v6 ())
{
Discover ();
if (address->transportStyle == data::RouterInfo::eTransportSSU )
{
TryPortMapping (I2P_UPNP_UDP, address->port);
}
else if (address->transportStyle == data::RouterInfo::eTransportNTCP )
{
TryPortMapping (I2P_UPNP_TCP, address->port);
}
}
}
}
void UPnP::Discover ()
{
int nerror = 0;
#if MINIUPNPC_API_VERSION >= 14
m_Devlist = upnpDiscoverFunc (2000, m_MulticastIf, m_Minissdpdpath, 0, 0, 2, &nerror);
#else
m_Devlist = upnpDiscoverFunc (2000, m_MulticastIf, m_Minissdpdpath, 0, 0, &nerror);
#endif
int r;
r = UPNP_GetValidIGDFunc (m_Devlist, &m_upnpUrls, &m_upnpData, m_NetworkAddr, sizeof (m_NetworkAddr));
if (r == 1)
{
r = UPNP_GetExternalIPAddressFunc (m_upnpUrls.controlURL, m_upnpData.first.servicetype, m_externalIPAddress);
if(r != UPNPCOMMAND_SUCCESS)
{
LogPrint (eLogError, "UPnP: UPNP_GetExternalIPAddress () returned ", r);
return;
}
else
{
if (m_externalIPAddress[0])
{
LogPrint (eLogInfo, "UPnP: ExternalIPAddress = ", m_externalIPAddress);
i2p::context.UpdateAddress (boost::asio::ip::address::from_string (m_externalIPAddress));
return;
}
else
{
LogPrint (eLogError, "UPnP: GetExternalIPAddress failed.");
return;
}
}
}
}
void UPnP::TryPortMapping (int type, int port)
{
std::string strType, strPort (std::to_string (port));
switch (type)
{
case I2P_UPNP_TCP:
strType = "TCP";
break;
case I2P_UPNP_UDP:
default:
strType = "UDP";
}
int r;
std::string strDesc = "I2Pd";
try {
for (;;) {
r = UPNP_AddPortMappingFunc (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strPort.c_str (), m_NetworkAddr, strDesc.c_str (), strType.c_str (), 0, "0");
if (r!=UPNPCOMMAND_SUCCESS)
{
LogPrint (eLogError, "UPnP: AddPortMapping (", strPort.c_str () ,", ", strPort.c_str () ,", ", m_NetworkAddr, ") failed with code ", r);
return;
}
else
{
LogPrint (eLogDebug, "UPnP: Port Mapping successful. (", m_NetworkAddr ,":", strPort.c_str(), " type ", strType.c_str () ," -> ", m_externalIPAddress ,":", strPort.c_str() ,")");
return;
}
std::this_thread::sleep_for(std::chrono::minutes(20)); // c++11
//boost::this_thread::sleep_for(); // pre c++11
//sleep(20*60); // non-portable
}
}
catch (boost::thread_interrupted)
{
CloseMapping(type, port);
Close();
throw;
}
}
void UPnP::CloseMapping (int type, int port)
{
std::string strType, strPort (std::to_string (port));
switch (type)
{
case I2P_UPNP_TCP:
strType = "TCP";
break;
case I2P_UPNP_UDP:
default:
strType = "UDP";
}
int r = 0;
r = UPNP_DeletePortMappingFunc (m_upnpUrls.controlURL, m_upnpData.first.servicetype, strPort.c_str (), strType.c_str (), 0);
LogPrint (eLogError, "UPnP: DeletePortMapping() returned : ", r, "\n");
}
void UPnP::Close ()
{
freeUPNPDevlistFunc (m_Devlist);
m_Devlist = 0;
FreeUPNPUrlsFunc (&m_upnpUrls);
#ifndef _WIN32
dlclose (m_Module);
#else
FreeLibrary (m_Module);
#endif
}
}
}
#endif