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1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
2 : : // Copyright (c) 2009-2022 The Bitcoin Core developers
3 : : // Distributed under the MIT software license, see the accompanying
4 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 : :
6 : : #include <bitcoin-build-config.h> // IWYU pragma: keep
7 : :
8 : : #include <net.h>
9 : :
10 : : #include <addrdb.h>
11 : : #include <addrman.h>
12 : : #include <banman.h>
13 : : #include <clientversion.h>
14 : : #include <common/args.h>
15 : : #include <common/netif.h>
16 : : #include <compat/compat.h>
17 : : #include <consensus/consensus.h>
18 : : #include <crypto/sha256.h>
19 : : #include <i2p.h>
20 : : #include <key.h>
21 : : #include <logging.h>
22 : : #include <memusage.h>
23 : : #include <net_permissions.h>
24 : : #include <netaddress.h>
25 : : #include <netbase.h>
26 : : #include <node/eviction.h>
27 : : #include <node/interface_ui.h>
28 : : #include <protocol.h>
29 : : #include <random.h>
30 : : #include <scheduler.h>
31 : : #include <util/fs.h>
32 : : #include <util/sock.h>
33 : : #include <util/strencodings.h>
34 : : #include <util/thread.h>
35 : : #include <util/threadinterrupt.h>
36 : : #include <util/trace.h>
37 : : #include <util/translation.h>
38 : : #include <util/vector.h>
39 : :
40 : : #ifdef WIN32
41 : : #include <string.h>
42 : : #endif
43 : :
44 : : #if HAVE_DECL_GETIFADDRS && HAVE_DECL_FREEIFADDRS
45 : : #include <ifaddrs.h>
46 : : #endif
47 : :
48 : : #include <algorithm>
49 : : #include <array>
50 : : #include <cmath>
51 : : #include <cstdint>
52 : : #include <functional>
53 : : #include <optional>
54 : : #include <unordered_map>
55 : :
56 : : TRACEPOINT_SEMAPHORE(net, outbound_message);
57 : :
58 : : /** Maximum number of block-relay-only anchor connections */
59 : : static constexpr size_t MAX_BLOCK_RELAY_ONLY_ANCHORS = 2;
60 : : static_assert (MAX_BLOCK_RELAY_ONLY_ANCHORS <= static_cast<size_t>(MAX_BLOCK_RELAY_ONLY_CONNECTIONS), "MAX_BLOCK_RELAY_ONLY_ANCHORS must not exceed MAX_BLOCK_RELAY_ONLY_CONNECTIONS.");
61 : : /** Anchor IP address database file name */
62 : : const char* const ANCHORS_DATABASE_FILENAME = "anchors.dat";
63 : :
64 : : // How often to dump addresses to peers.dat
65 : : static constexpr std::chrono::minutes DUMP_PEERS_INTERVAL{15};
66 : :
67 : : /** Number of DNS seeds to query when the number of connections is low. */
68 : : static constexpr int DNSSEEDS_TO_QUERY_AT_ONCE = 3;
69 : :
70 : : /** Minimum number of outbound connections under which we will keep fetching our address seeds. */
71 : : static constexpr int SEED_OUTBOUND_CONNECTION_THRESHOLD = 2;
72 : :
73 : : /** How long to delay before querying DNS seeds
74 : : *
75 : : * If we have more than THRESHOLD entries in addrman, then it's likely
76 : : * that we got those addresses from having previously connected to the P2P
77 : : * network, and that we'll be able to successfully reconnect to the P2P
78 : : * network via contacting one of them. So if that's the case, spend a
79 : : * little longer trying to connect to known peers before querying the
80 : : * DNS seeds.
81 : : */
82 : : static constexpr std::chrono::seconds DNSSEEDS_DELAY_FEW_PEERS{11};
83 : : static constexpr std::chrono::minutes DNSSEEDS_DELAY_MANY_PEERS{5};
84 : : static constexpr int DNSSEEDS_DELAY_PEER_THRESHOLD = 1000; // "many" vs "few" peers
85 : :
86 : : /** The default timeframe for -maxuploadtarget. 1 day. */
87 : : static constexpr std::chrono::seconds MAX_UPLOAD_TIMEFRAME{60 * 60 * 24};
88 : :
89 : : // A random time period (0 to 1 seconds) is added to feeler connections to prevent synchronization.
90 : : static constexpr auto FEELER_SLEEP_WINDOW{1s};
91 : :
92 : : /** Frequency to attempt extra connections to reachable networks we're not connected to yet **/
93 : : static constexpr auto EXTRA_NETWORK_PEER_INTERVAL{5min};
94 : :
95 : : /** Used to pass flags to the Bind() function */
96 : : enum BindFlags {
97 : : BF_NONE = 0,
98 : : BF_REPORT_ERROR = (1U << 0),
99 : : /**
100 : : * Do not call AddLocal() for our special addresses, e.g., for incoming
101 : : * Tor connections, to prevent gossiping them over the network.
102 : : */
103 : : BF_DONT_ADVERTISE = (1U << 1),
104 : : };
105 : :
106 : : // The set of sockets cannot be modified while waiting
107 : : // The sleep time needs to be small to avoid new sockets stalling
108 : : static const uint64_t SELECT_TIMEOUT_MILLISECONDS = 50;
109 : :
110 : : const std::string NET_MESSAGE_TYPE_OTHER = "*other*";
111 : :
112 : : static const uint64_t RANDOMIZER_ID_NETGROUP = 0x6c0edd8036ef4036ULL; // SHA256("netgroup")[0:8]
113 : : static const uint64_t RANDOMIZER_ID_LOCALHOSTNONCE = 0xd93e69e2bbfa5735ULL; // SHA256("localhostnonce")[0:8]
114 : : static const uint64_t RANDOMIZER_ID_ADDRCACHE = 0x1cf2e4ddd306dda9ULL; // SHA256("addrcache")[0:8]
115 : : //
116 : : // Global state variables
117 : : //
118 : : bool fDiscover = true;
119 : : bool fListen = true;
120 : : GlobalMutex g_maplocalhost_mutex;
121 : : std::map<CNetAddr, LocalServiceInfo> mapLocalHost GUARDED_BY(g_maplocalhost_mutex);
122 : : std::string strSubVersion;
123 : :
124 : 650438 : size_t CSerializedNetMsg::GetMemoryUsage() const noexcept
125 : : {
126 [ + + ]: 650438 : return sizeof(*this) + memusage::DynamicUsage(m_type) + memusage::DynamicUsage(data);
127 : : }
128 : :
129 : 319938 : size_t CNetMessage::GetMemoryUsage() const noexcept
130 : : {
131 : 319938 : return sizeof(*this) + memusage::DynamicUsage(m_type) + m_recv.GetMemoryUsage();
132 : : }
133 : :
134 : 9 : void CConnman::AddAddrFetch(const std::string& strDest)
135 : : {
136 : 9 : LOCK(m_addr_fetches_mutex);
137 [ + - ]: 9 : m_addr_fetches.push_back(strDest);
138 : 9 : }
139 : :
140 : 1542 : uint16_t GetListenPort()
141 : : {
142 : : // If -bind= is provided with ":port" part, use that (first one if multiple are provided).
143 [ + - + + ]: 3134 : for (const std::string& bind_arg : gArgs.GetArgs("-bind")) {
144 : 1595 : constexpr uint16_t dummy_port = 0;
145 : :
146 [ + - + - ]: 1595 : const std::optional<CService> bind_addr{Lookup(bind_arg, dummy_port, /*fAllowLookup=*/false)};
147 [ + + + - : 1595 : if (bind_addr.has_value() && bind_addr->GetPort() != dummy_port) return bind_addr->GetPort();
+ + + - ]
148 : 3134 : }
149 : :
150 : : // Otherwise, if -whitebind= without NetPermissionFlags::NoBan is provided, use that
151 : : // (-whitebind= is required to have ":port").
152 [ + - + + ]: 1539 : for (const std::string& whitebind_arg : gArgs.GetArgs("-whitebind")) {
153 [ + - ]: 1 : NetWhitebindPermissions whitebind;
154 [ + - ]: 1 : bilingual_str error;
155 [ + - + - ]: 1 : if (NetWhitebindPermissions::TryParse(whitebind_arg, whitebind, error)) {
156 [ + - ]: 1 : if (!NetPermissions::HasFlag(whitebind.m_flags, NetPermissionFlags::NoBan)) {
157 [ + - ]: 1 : return whitebind.m_service.GetPort();
158 : : }
159 : : }
160 : 1539 : }
161 : :
162 : : // Otherwise, if -port= is provided, use that. Otherwise use the default port.
163 [ + - ]: 1538 : return static_cast<uint16_t>(gArgs.GetIntArg("-port", Params().GetDefaultPort()));
164 : : }
165 : :
166 : : // Determine the "best" local address for a particular peer.
167 : 1536 : [[nodiscard]] static std::optional<CService> GetLocal(const CNode& peer)
168 : : {
169 [ - + ]: 1536 : if (!fListen) return std::nullopt;
170 : :
171 : 1536 : std::optional<CService> addr;
172 : 1536 : int nBestScore = -1;
173 : 1536 : int nBestReachability = -1;
174 : 1536 : {
175 [ + - ]: 1536 : LOCK(g_maplocalhost_mutex);
176 [ + - + + ]: 1607 : for (const auto& [local_addr, local_service_info] : mapLocalHost) {
177 : : // For privacy reasons, don't advertise our privacy-network address
178 : : // to other networks and don't advertise our other-network address
179 : : // to privacy networks.
180 [ + - + - ]: 71 : if (local_addr.GetNetwork() != peer.ConnectedThroughNetwork()
181 [ + + + - : 104 : && (local_addr.IsPrivacyNet() || peer.IsConnectedThroughPrivacyNet())) {
+ + ]
182 : 36 : continue;
183 : : }
184 : 35 : const int nScore{local_service_info.nScore};
185 [ + - ]: 35 : const int nReachability{local_addr.GetReachabilityFrom(peer.addr)};
186 [ + + - + ]: 35 : if (nReachability > nBestReachability || (nReachability == nBestReachability && nScore > nBestScore)) {
187 [ + - ]: 18 : addr.emplace(CService{local_addr, local_service_info.nPort});
188 : 18 : nBestReachability = nReachability;
189 : 18 : nBestScore = nScore;
190 : : }
191 : : }
192 : 0 : }
193 [ + + ]: 1551 : return addr;
194 : 1536 : }
195 : :
196 : : //! Convert the serialized seeds into usable address objects.
197 : 3 : static std::vector<CAddress> ConvertSeeds(const std::vector<uint8_t> &vSeedsIn)
198 : : {
199 : : // It'll only connect to one or two seed nodes because once it connects,
200 : : // it'll get a pile of addresses with newer timestamps.
201 : : // Seed nodes are given a random 'last seen time' of between one and two
202 : : // weeks ago.
203 : 3 : const auto one_week{7 * 24h};
204 : 3 : std::vector<CAddress> vSeedsOut;
205 : 3 : FastRandomContext rng;
206 [ + - ]: 3 : ParamsStream s{DataStream{vSeedsIn}, CAddress::V2_NETWORK};
207 [ - + ]: 3 : while (!s.eof()) {
208 [ # # ]: 0 : CService endpoint;
209 [ # # ]: 0 : s >> endpoint;
210 : 0 : CAddress addr{endpoint, SeedsServiceFlags()};
211 : 0 : addr.nTime = rng.rand_uniform_delay(Now<NodeSeconds>() - one_week, -one_week);
212 [ # # # # : 0 : LogDebug(BCLog::NET, "Added hardcoded seed: %s\n", addr.ToStringAddrPort());
# # # # ]
213 [ # # ]: 0 : vSeedsOut.push_back(addr);
214 : 0 : }
215 : 3 : return vSeedsOut;
216 : 3 : }
217 : :
218 : : // Determine the "best" local address for a particular peer.
219 : : // If none, return the unroutable 0.0.0.0 but filled in with
220 : : // the normal parameters, since the IP may be changed to a useful
221 : : // one by discovery.
222 : 1536 : CService GetLocalAddress(const CNode& peer)
223 : : {
224 [ + - + - : 1536 : return GetLocal(peer).value_or(CService{CNetAddr(), GetListenPort()});
+ - ]
225 : : }
226 : :
227 : 0 : static int GetnScore(const CService& addr)
228 : : {
229 : 0 : LOCK(g_maplocalhost_mutex);
230 [ # # ]: 0 : const auto it = mapLocalHost.find(addr);
231 [ # # # # ]: 0 : return (it != mapLocalHost.end()) ? it->second.nScore : 0;
232 : 0 : }
233 : :
234 : : // Is our peer's addrLocal potentially useful as an external IP source?
235 : 1515 : [[nodiscard]] static bool IsPeerAddrLocalGood(CNode *pnode)
236 : : {
237 : 1515 : CService addrLocal = pnode->GetAddrLocal();
238 [ + + + - : 1519 : return fDiscover && pnode->addr.IsRoutable() && addrLocal.IsRoutable() &&
+ - + - +
- - + ]
239 [ + - ]: 1519 : g_reachable_nets.Contains(addrLocal);
240 : 1515 : }
241 : :
242 : 1515 : std::optional<CService> GetLocalAddrForPeer(CNode& node)
243 : : {
244 : 1515 : CService addrLocal{GetLocalAddress(node)};
245 : : // If discovery is enabled, sometimes give our peer the address it
246 : : // tells us that it sees us as in case it has a better idea of our
247 : : // address than we do.
248 : 1515 : FastRandomContext rng;
249 [ + - + + : 1515 : if (IsPeerAddrLocalGood(&node) && (!addrLocal.IsRoutable() ||
+ - - + -
- ]
250 [ # # # # ]: 0 : rng.randbits((GetnScore(addrLocal) > LOCAL_MANUAL) ? 3 : 1) == 0))
251 : : {
252 [ + + ]: 4 : if (node.IsInboundConn()) {
253 : : // For inbound connections, assume both the address and the port
254 : : // as seen from the peer.
255 [ + - ]: 2 : addrLocal = CService{node.GetAddrLocal()};
256 : : } else {
257 : : // For outbound connections, assume just the address as seen from
258 : : // the peer and leave the port in `addrLocal` as returned by
259 : : // `GetLocalAddress()` above. The peer has no way to observe our
260 : : // listening port when we have initiated the connection.
261 [ + - + - ]: 6 : addrLocal.SetIP(node.GetAddrLocal());
262 : : }
263 : : }
264 [ + - + + ]: 1515 : if (addrLocal.IsRoutable()) {
265 [ + - + - : 8 : LogDebug(BCLog::NET, "Advertising address %s to peer=%d\n", addrLocal.ToStringAddrPort(), node.GetId());
+ - + - ]
266 : 4 : return addrLocal;
267 : : }
268 : : // Address is unroutable. Don't advertise.
269 : 1511 : return std::nullopt;
270 : 1515 : }
271 : :
272 : : // learn a new local address
273 : 11 : bool AddLocal(const CService& addr_, int nScore)
274 : : {
275 : 11 : CService addr{MaybeFlipIPv6toCJDNS(addr_)};
276 : :
277 [ + - + - ]: 11 : if (!addr.IsRoutable())
278 : : return false;
279 : :
280 [ - + - - ]: 11 : if (!fDiscover && nScore < LOCAL_MANUAL)
281 : : return false;
282 : :
283 [ + - + - ]: 11 : if (!g_reachable_nets.Contains(addr))
284 : : return false;
285 : :
286 [ + - + - ]: 11 : LogPrintf("AddLocal(%s,%i)\n", addr.ToStringAddrPort(), nScore);
287 : :
288 : 11 : {
289 [ + - ]: 11 : LOCK(g_maplocalhost_mutex);
290 [ + - - + ]: 11 : const auto [it, is_newly_added] = mapLocalHost.emplace(addr, LocalServiceInfo());
291 [ - + ]: 11 : LocalServiceInfo &info = it->second;
292 [ - + - - ]: 11 : if (is_newly_added || nScore >= info.nScore) {
293 [ - + ]: 11 : info.nScore = nScore + (is_newly_added ? 0 : 1);
294 [ + - ]: 11 : info.nPort = addr.GetPort();
295 : : }
296 : 0 : }
297 : :
298 : 11 : return true;
299 : 11 : }
300 : :
301 : 0 : bool AddLocal(const CNetAddr &addr, int nScore)
302 : : {
303 [ # # ]: 0 : return AddLocal(CService(addr, GetListenPort()), nScore);
304 : : }
305 : :
306 : 11 : void RemoveLocal(const CService& addr)
307 : : {
308 : 11 : LOCK(g_maplocalhost_mutex);
309 [ + - + - ]: 11 : LogPrintf("RemoveLocal(%s)\n", addr.ToStringAddrPort());
310 [ + - + - ]: 11 : mapLocalHost.erase(addr);
311 : 11 : }
312 : :
313 : : /** vote for a local address */
314 : 0 : bool SeenLocal(const CService& addr)
315 : : {
316 : 0 : LOCK(g_maplocalhost_mutex);
317 [ # # ]: 0 : const auto it = mapLocalHost.find(addr);
318 [ # # ]: 0 : if (it == mapLocalHost.end()) return false;
319 : 0 : ++it->second.nScore;
320 : 0 : return true;
321 : 0 : }
322 : :
323 : :
324 : : /** check whether a given address is potentially local */
325 : 12 : bool IsLocal(const CService& addr)
326 : : {
327 : 12 : LOCK(g_maplocalhost_mutex);
328 [ + - + - ]: 12 : return mapLocalHost.count(addr) > 0;
329 : 12 : }
330 : :
331 : 9 : CNode* CConnman::FindNode(const CNetAddr& ip)
332 : : {
333 : 9 : LOCK(m_nodes_mutex);
334 [ + + ]: 24 : for (CNode* pnode : m_nodes) {
335 [ + - + + ]: 21 : if (static_cast<CNetAddr>(pnode->addr) == ip) {
336 : : return pnode;
337 : : }
338 : : }
339 : : return nullptr;
340 : 9 : }
341 : :
342 : 610 : CNode* CConnman::FindNode(const std::string& addrName)
343 : : {
344 : 610 : LOCK(m_nodes_mutex);
345 [ + + ]: 1147 : for (CNode* pnode : m_nodes) {
346 [ + + ]: 539 : if (pnode->m_addr_name == addrName) {
347 : : return pnode;
348 : : }
349 : : }
350 : : return nullptr;
351 : 610 : }
352 : :
353 : 601 : CNode* CConnman::FindNode(const CService& addr)
354 : : {
355 : 601 : LOCK(m_nodes_mutex);
356 [ + + ]: 1114 : for (CNode* pnode : m_nodes) {
357 [ + - + + ]: 523 : if (static_cast<CService>(pnode->addr) == addr) {
358 : : return pnode;
359 : : }
360 : : }
361 : : return nullptr;
362 : 601 : }
363 : :
364 : 9 : bool CConnman::AlreadyConnectedToAddress(const CAddress& addr)
365 : : {
366 [ + - + + : 21 : return FindNode(static_cast<CNetAddr>(addr)) || FindNode(addr.ToStringAddrPort());
+ - + - +
- ]
367 : : }
368 : :
369 : 933 : bool CConnman::CheckIncomingNonce(uint64_t nonce)
370 : : {
371 : 933 : LOCK(m_nodes_mutex);
372 [ + + ]: 3491 : for (const CNode* pnode : m_nodes) {
373 [ + + + + : 2560 : if (!pnode->fSuccessfullyConnected && !pnode->IsInboundConn() && pnode->GetLocalNonce() == nonce)
- + ]
374 : : return false;
375 : : }
376 : : return true;
377 : 933 : }
378 : :
379 : : /** Get the bind address for a socket as CAddress */
380 : 1538 : static CAddress GetBindAddress(const Sock& sock)
381 : : {
382 : 1538 : CAddress addr_bind;
383 : 1538 : struct sockaddr_storage sockaddr_bind;
384 : 1538 : socklen_t sockaddr_bind_len = sizeof(sockaddr_bind);
385 [ + - + - ]: 1538 : if (!sock.GetSockName((struct sockaddr*)&sockaddr_bind, &sockaddr_bind_len)) {
386 [ + - ]: 1538 : addr_bind.SetSockAddr((const struct sockaddr*)&sockaddr_bind);
387 : : } else {
388 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Warning, "getsockname failed\n");
# # ]
389 : : }
390 : 1538 : return addr_bind;
391 : 0 : }
392 : :
393 : 616 : CNode* CConnman::ConnectNode(CAddress addrConnect, const char *pszDest, bool fCountFailure, ConnectionType conn_type, bool use_v2transport)
394 : : {
395 : 616 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
396 [ - + ]: 616 : assert(conn_type != ConnectionType::INBOUND);
397 : :
398 [ + + ]: 616 : if (pszDest == nullptr) {
399 [ + - ]: 3 : if (IsLocal(addrConnect))
400 : : return nullptr;
401 : :
402 : : // Look for an existing connection
403 [ + - ]: 3 : CNode* pnode = FindNode(static_cast<CService>(addrConnect));
404 [ - + ]: 3 : if (pnode)
405 : : {
406 : 0 : LogPrintf("Failed to open new connection, already connected\n");
407 : 0 : return nullptr;
408 : : }
409 : : }
410 : :
411 [ + - + + : 1754 : LogPrintLevel(BCLog::NET, BCLog::Level::Debug, "trying %s connection %s lastseen=%.1fhrs\n",
+ + + + +
- ]
412 : : use_v2transport ? "v2" : "v1",
413 : : pszDest ? pszDest : addrConnect.ToStringAddrPort(),
414 : : Ticks<HoursDouble>(pszDest ? 0h : Now<NodeSeconds>() - addrConnect.nTime));
415 : :
416 : : // Resolve
417 [ + + + - ]: 1229 : const uint16_t default_port{pszDest != nullptr ? GetDefaultPort(pszDest) :
418 : 616 : m_params.GetDefaultPort()};
419 : :
420 : : // Collection of addresses to try to connect to: either all dns resolved addresses if a domain name (pszDest) is provided, or addrConnect otherwise.
421 : 616 : std::vector<CAddress> connect_to{};
422 [ + + ]: 616 : if (pszDest) {
423 [ + - + - : 1274 : std::vector<CService> resolved{Lookup(pszDest, default_port, fNameLookup && !HaveNameProxy(), 256)};
+ - + + +
- + - ]
424 [ + + ]: 613 : if (!resolved.empty()) {
425 : 600 : std::shuffle(resolved.begin(), resolved.end(), FastRandomContext());
426 : : // If the connection is made by name, it can be the case that the name resolves to more than one address.
427 : : // We don't want to connect any more of them if we are already connected to one
428 [ + + ]: 1188 : for (const auto& r : resolved) {
429 [ + - ]: 600 : addrConnect = CAddress{MaybeFlipIPv6toCJDNS(r), NODE_NONE};
430 [ + - + + ]: 600 : if (!addrConnect.IsValid()) {
431 [ + - + - : 4 : LogDebug(BCLog::NET, "Resolver returned invalid address %s for %s\n", addrConnect.ToStringAddrPort(), pszDest);
+ - + - ]
432 : 2 : return nullptr;
433 : : }
434 : : // It is possible that we already have a connection to the IP/port pszDest resolved to.
435 : : // In that case, drop the connection that was just created.
436 [ + - ]: 598 : LOCK(m_nodes_mutex);
437 [ + - ]: 598 : CNode* pnode = FindNode(static_cast<CService>(addrConnect));
438 [ + + ]: 598 : if (pnode) {
439 [ + - + - ]: 10 : LogPrintf("Not opening a connection to %s, already connected to %s\n", pszDest, addrConnect.ToStringAddrPort());
440 [ + - ]: 10 : return nullptr;
441 : : }
442 : : // Add the address to the resolved addresses vector so we can try to connect to it later on
443 [ + - ]: 588 : connect_to.push_back(addrConnect);
444 : 598 : }
445 : : } else {
446 : : // For resolution via proxy
447 [ + - ]: 13 : connect_to.push_back(addrConnect);
448 : : }
449 : 613 : } else {
450 : : // Connect via addrConnect directly
451 [ + - ]: 3 : connect_to.push_back(addrConnect);
452 : : }
453 : :
454 : : // Connect
455 : 604 : std::unique_ptr<Sock> sock;
456 [ + - ]: 604 : Proxy proxy;
457 [ + - ]: 604 : CAddress addr_bind;
458 [ + - - + ]: 604 : assert(!addr_bind.IsValid());
459 : 604 : std::unique_ptr<i2p::sam::Session> i2p_transient_session;
460 : :
461 [ + + ]: 623 : for (auto& target_addr: connect_to) {
462 [ + - + + ]: 604 : if (target_addr.IsValid()) {
463 [ + - + - ]: 591 : const bool use_proxy{GetProxy(target_addr.GetNetwork(), proxy)};
464 : 591 : bool proxyConnectionFailed = false;
465 : :
466 [ + + - + ]: 591 : if (target_addr.IsI2P() && use_proxy) {
467 [ + - ]: 4 : i2p::Connection conn;
468 : 4 : bool connected{false};
469 : :
470 [ + + ]: 4 : if (m_i2p_sam_session) {
471 [ + - ]: 3 : connected = m_i2p_sam_session->Connect(target_addr, conn, proxyConnectionFailed);
472 : : } else {
473 : 1 : {
474 [ + - ]: 1 : LOCK(m_unused_i2p_sessions_mutex);
475 [ + - ]: 1 : if (m_unused_i2p_sessions.empty()) {
476 : 1 : i2p_transient_session =
477 [ + - ]: 2 : std::make_unique<i2p::sam::Session>(proxy, &interruptNet);
478 : : } else {
479 : 0 : i2p_transient_session.swap(m_unused_i2p_sessions.front());
480 : 0 : m_unused_i2p_sessions.pop();
481 : : }
482 : 0 : }
483 [ + - ]: 1 : connected = i2p_transient_session->Connect(target_addr, conn, proxyConnectionFailed);
484 [ + - ]: 1 : if (!connected) {
485 [ + - ]: 1 : LOCK(m_unused_i2p_sessions_mutex);
486 [ + - ]: 1 : if (m_unused_i2p_sessions.size() < MAX_UNUSED_I2P_SESSIONS_SIZE) {
487 [ + - + - ]: 1 : m_unused_i2p_sessions.emplace(i2p_transient_session.release());
488 : : }
489 : 1 : }
490 : : }
491 : :
492 [ - + ]: 4 : if (connected) {
493 : 0 : sock = std::move(conn.sock);
494 : 0 : addr_bind = CAddress{conn.me, NODE_NONE};
495 : : }
496 [ + + ]: 591 : } else if (use_proxy) {
497 [ + - + - : 38 : LogPrintLevel(BCLog::PROXY, BCLog::Level::Debug, "Using proxy: %s to connect to %s\n", proxy.ToString(), target_addr.ToStringAddrPort());
+ - + - +
- ]
498 [ + - + - : 38 : sock = ConnectThroughProxy(proxy, target_addr.ToStringAddr(), target_addr.GetPort(), proxyConnectionFailed);
+ - ]
499 : : } else {
500 : : // no proxy needed (none set for target network)
501 [ + - ]: 1136 : sock = ConnectDirectly(target_addr, conn_type == ConnectionType::MANUAL);
502 : : }
503 [ + + ]: 591 : if (!proxyConnectionFailed) {
504 : : // If a connection to the node was attempted, and failure (if any) is not caused by a problem connecting to
505 : : // the proxy, mark this as an attempt.
506 [ + - ]: 582 : addrman.Attempt(target_addr, fCountFailure);
507 : : }
508 [ + - + - : 13 : } else if (pszDest && GetNameProxy(proxy)) {
+ - ]
509 [ + - ]: 13 : std::string host;
510 : 13 : uint16_t port{default_port};
511 [ + - + - ]: 13 : SplitHostPort(std::string(pszDest), port, host);
512 : 13 : bool proxyConnectionFailed;
513 [ + - ]: 26 : sock = ConnectThroughProxy(proxy, host, port, proxyConnectionFailed);
514 : 13 : }
515 : : // Check any other resolved address (if any) if we fail to connect
516 [ + + ]: 604 : if (!sock) {
517 : 19 : continue;
518 : : }
519 : :
520 : 585 : NetPermissionFlags permission_flags = NetPermissionFlags::None;
521 [ + + + - ]: 585 : std::vector<NetWhitelistPermissions> whitelist_permissions = conn_type == ConnectionType::MANUAL ? vWhitelistedRangeOutgoing : std::vector<NetWhitelistPermissions>{};
522 [ + - ]: 585 : AddWhitelistPermissionFlags(permission_flags, target_addr, whitelist_permissions);
523 : :
524 : : // Add node
525 [ + - ]: 585 : NodeId id = GetNewNodeId();
526 [ + - + - : 585 : uint64_t nonce = GetDeterministicRandomizer(RANDOMIZER_ID_LOCALHOSTNONCE).Write(id).Finalize();
+ - ]
527 [ + - + - ]: 585 : if (!addr_bind.IsValid()) {
528 [ + - ]: 585 : addr_bind = GetBindAddress(*sock);
529 : : }
530 : 585 : CNode* pnode = new CNode(id,
531 : : std::move(sock),
532 : : target_addr,
533 : : CalculateKeyedNetGroup(target_addr),
534 : : nonce,
535 : : addr_bind,
536 : 585 : pszDest ? pszDest : "",
537 : : conn_type,
538 : : /*inbound_onion=*/false,
539 [ + - ]: 585 : CNodeOptions{
540 : : .permission_flags = permission_flags,
541 : : .i2p_sam_session = std::move(i2p_transient_session),
542 [ + - ]: 585 : .recv_flood_size = nReceiveFloodSize,
543 : : .use_v2transport = use_v2transport,
544 [ + - + - : 1755 : });
+ - + - +
- + - +
- ]
545 : 585 : pnode->AddRef();
546 : :
547 : : // We're making a new connection, harvest entropy from the time (and our peer count)
548 : 585 : RandAddEvent((uint32_t)id);
549 : :
550 : 585 : return pnode;
551 : 585 : }
552 : :
553 : : return nullptr;
554 : 1220 : }
555 : :
556 : 1999 : void CNode::CloseSocketDisconnect()
557 : : {
558 : 1999 : fDisconnect = true;
559 : 1999 : LOCK(m_sock_mutex);
560 [ + + ]: 1999 : if (m_sock) {
561 : 1535 : m_sock.reset();
562 : : }
563 [ - + + - ]: 1999 : m_i2p_sam_session.reset();
564 : 1999 : }
565 : :
566 : 1538 : void CConnman::AddWhitelistPermissionFlags(NetPermissionFlags& flags, const CNetAddr &addr, const std::vector<NetWhitelistPermissions>& ranges) const {
567 [ + + ]: 1824 : for (const auto& subnet : ranges) {
568 [ + - ]: 286 : if (subnet.m_subnet.Match(addr)) {
569 : 286 : NetPermissions::AddFlag(flags, subnet.m_flags);
570 : : }
571 : : }
572 [ + + ]: 1538 : if (NetPermissions::HasFlag(flags, NetPermissionFlags::Implicit)) {
573 [ + + ]: 5 : NetPermissions::ClearFlag(flags, NetPermissionFlags::Implicit);
574 [ + + ]: 5 : if (whitelist_forcerelay) NetPermissions::AddFlag(flags, NetPermissionFlags::ForceRelay);
575 [ + + ]: 5 : if (whitelist_relay) NetPermissions::AddFlag(flags, NetPermissionFlags::Relay);
576 : 5 : NetPermissions::AddFlag(flags, NetPermissionFlags::Mempool);
577 : 5 : NetPermissions::AddFlag(flags, NetPermissionFlags::NoBan);
578 : : }
579 : 1538 : }
580 : :
581 : 11862 : CService CNode::GetAddrLocal() const
582 : : {
583 : 11862 : AssertLockNotHeld(m_addr_local_mutex);
584 : 11862 : LOCK(m_addr_local_mutex);
585 [ + - ]: 11862 : return m_addr_local;
586 : 11862 : }
587 : :
588 : 1473 : void CNode::SetAddrLocal(const CService& addrLocalIn) {
589 : 1473 : AssertLockNotHeld(m_addr_local_mutex);
590 : 1473 : LOCK(m_addr_local_mutex);
591 [ + - + - ]: 1473 : if (Assume(!m_addr_local.IsValid())) { // Addr local can only be set once during version msg processing
592 : 1473 : m_addr_local = addrLocalIn;
593 : : }
594 : 1473 : }
595 : :
596 : 11322 : Network CNode::ConnectedThroughNetwork() const
597 : : {
598 [ + + ]: 11322 : return m_inbound_onion ? NET_ONION : addr.GetNetClass();
599 : : }
600 : :
601 : 33 : bool CNode::IsConnectedThroughPrivacyNet() const
602 : : {
603 [ + - + + ]: 33 : return m_inbound_onion || addr.IsPrivacyNet();
604 : : }
605 : :
606 : : #undef X
607 : : #define X(name) stats.name = name
608 : 10343 : void CNode::CopyStats(CNodeStats& stats)
609 : : {
610 : 10343 : stats.nodeid = this->GetId();
611 : 10343 : X(addr);
612 : 10343 : X(addrBind);
613 : 10343 : stats.m_network = ConnectedThroughNetwork();
614 : 10343 : X(m_last_send);
615 : 10343 : X(m_last_recv);
616 : 10343 : X(m_last_tx_time);
617 : 10343 : X(m_last_block_time);
618 : 10343 : X(m_connected);
619 : 10343 : X(m_addr_name);
620 : 10343 : X(nVersion);
621 : 10343 : {
622 : 10343 : LOCK(m_subver_mutex);
623 [ + - + - ]: 20686 : X(cleanSubVer);
624 : 0 : }
625 : 10343 : stats.fInbound = IsInboundConn();
626 : 10343 : X(m_bip152_highbandwidth_to);
627 : 10343 : X(m_bip152_highbandwidth_from);
628 : 10343 : {
629 : 10343 : LOCK(cs_vSend);
630 [ + - ]: 10343 : X(mapSendBytesPerMsgType);
631 [ + - ]: 10343 : X(nSendBytes);
632 : 0 : }
633 : 10343 : {
634 : 10343 : LOCK(cs_vRecv);
635 [ + - ]: 10343 : X(mapRecvBytesPerMsgType);
636 : 10343 : X(nRecvBytes);
637 : 10343 : Transport::Info info = m_transport->GetInfo();
638 : 10343 : stats.m_transport_type = info.transport_type;
639 [ + + + - ]: 10343 : if (info.session_id) stats.m_session_id = HexStr(*info.session_id);
640 : 0 : }
641 : 10343 : X(m_permission_flags);
642 : :
643 : 10343 : X(m_last_ping_time);
644 : 10343 : X(m_min_ping_time);
645 : :
646 : : // Leave string empty if addrLocal invalid (not filled in yet)
647 : 10343 : CService addrLocalUnlocked = GetAddrLocal();
648 [ + - + + : 10343 : stats.addrLocal = addrLocalUnlocked.IsValid() ? addrLocalUnlocked.ToStringAddrPort() : "";
+ - + - ]
649 : :
650 : 10343 : X(m_conn_type);
651 : 10343 : }
652 : : #undef X
653 : :
654 : 245152 : bool CNode::ReceiveMsgBytes(Span<const uint8_t> msg_bytes, bool& complete)
655 : : {
656 : 245152 : complete = false;
657 : 245152 : const auto time = GetTime<std::chrono::microseconds>();
658 : 245152 : LOCK(cs_vRecv);
659 : 245152 : m_last_recv = std::chrono::duration_cast<std::chrono::seconds>(time);
660 : 245152 : nRecvBytes += msg_bytes.size();
661 [ + + ]: 897552 : while (msg_bytes.size() > 0) {
662 : : // absorb network data
663 [ + - + + ]: 407258 : if (!m_transport->ReceivedBytes(msg_bytes)) {
664 : : // Serious transport problem, disconnect from the peer.
665 : : return false;
666 : : }
667 : :
668 [ + - + + ]: 407248 : if (m_transport->ReceivedMessageComplete()) {
669 : : // decompose a transport agnostic CNetMessage from the deserializer
670 : 161290 : bool reject_message{false};
671 [ + - ]: 161290 : CNetMessage msg = m_transport->GetReceivedMessage(time, reject_message);
672 [ + + ]: 161290 : if (reject_message) {
673 : : // Message deserialization failed. Drop the message but don't disconnect the peer.
674 : : // store the size of the corrupt message
675 [ + - ]: 82 : mapRecvBytesPerMsgType.at(NET_MESSAGE_TYPE_OTHER) += msg.m_raw_message_size;
676 : 82 : continue;
677 : : }
678 : :
679 : : // Store received bytes per message type.
680 : : // To prevent a memory DOS, only allow known message types.
681 : 161208 : auto i = mapRecvBytesPerMsgType.find(msg.m_type);
682 [ + + ]: 161208 : if (i == mapRecvBytesPerMsgType.end()) {
683 : 6 : i = mapRecvBytesPerMsgType.find(NET_MESSAGE_TYPE_OTHER);
684 : : }
685 [ - + ]: 161208 : assert(i != mapRecvBytesPerMsgType.end());
686 [ + - ]: 161208 : i->second += msg.m_raw_message_size;
687 : :
688 : : // push the message to the process queue,
689 [ + - ]: 161208 : vRecvMsg.push_back(std::move(msg));
690 : :
691 : 161208 : complete = true;
692 : 161290 : }
693 : : }
694 : :
695 : : return true;
696 : 245152 : }
697 : :
698 : 4201 : std::string CNode::LogIP(bool log_ip) const
699 : : {
700 [ + + + - : 4207 : return log_ip ? strprintf(" peeraddr=%s", addr.ToStringAddrPort()) : "";
+ - + - -
- ]
701 : : }
702 : :
703 : 1275 : std::string CNode::DisconnectMsg(bool log_ip) const
704 : : {
705 : 1275 : return strprintf("disconnecting peer=%d%s",
706 [ + - ]: 1275 : GetId(),
707 [ + - ]: 2550 : LogIP(log_ip));
708 : : }
709 : :
710 : 1650 : V1Transport::V1Transport(const NodeId node_id) noexcept
711 : 1650 : : m_magic_bytes{Params().MessageStart()}, m_node_id{node_id}
712 : : {
713 : 1650 : LOCK(m_recv_mutex);
714 [ + - ]: 1650 : Reset();
715 : 1650 : }
716 : :
717 : 9908 : Transport::Info V1Transport::GetInfo() const noexcept
718 : : {
719 : 9908 : return {.transport_type = TransportProtocolType::V1, .session_id = {}};
720 : : }
721 : :
722 : 153481 : int V1Transport::readHeader(Span<const uint8_t> msg_bytes)
723 : : {
724 : 153481 : AssertLockHeld(m_recv_mutex);
725 : : // copy data to temporary parsing buffer
726 : 153481 : unsigned int nRemaining = CMessageHeader::HEADER_SIZE - nHdrPos;
727 [ + + ]: 153481 : unsigned int nCopy = std::min<unsigned int>(nRemaining, msg_bytes.size());
728 : :
729 [ + + ]: 153481 : memcpy(&hdrbuf[nHdrPos], msg_bytes.data(), nCopy);
730 : 153481 : nHdrPos += nCopy;
731 : :
732 : : // if header incomplete, exit
733 [ + + ]: 153481 : if (nHdrPos < CMessageHeader::HEADER_SIZE)
734 : 10 : return nCopy;
735 : :
736 : : // deserialize to CMessageHeader
737 : 153471 : try {
738 [ + - ]: 153471 : hdrbuf >> hdr;
739 : : }
740 [ - - ]: 0 : catch (const std::exception&) {
741 [ - - - - : 0 : LogDebug(BCLog::NET, "Header error: Unable to deserialize, peer=%d\n", m_node_id);
- - ]
742 : 0 : return -1;
743 : 0 : }
744 : :
745 : : // Check start string, network magic
746 [ + + ]: 153471 : if (hdr.pchMessageStart != m_magic_bytes) {
747 [ + - + - ]: 4 : LogDebug(BCLog::NET, "Header error: Wrong MessageStart %s received, peer=%d\n", HexStr(hdr.pchMessageStart), m_node_id);
748 : 2 : return -1;
749 : : }
750 : :
751 : : // reject messages larger than MAX_SIZE or MAX_PROTOCOL_MESSAGE_LENGTH
752 [ + + ]: 153469 : if (hdr.nMessageSize > MAX_SIZE || hdr.nMessageSize > MAX_PROTOCOL_MESSAGE_LENGTH) {
753 [ + - + - : 6 : LogDebug(BCLog::NET, "Header error: Size too large (%s, %u bytes), peer=%d\n", SanitizeString(hdr.GetMessageType()), hdr.nMessageSize, m_node_id);
+ - ]
754 : 3 : return -1;
755 : : }
756 : :
757 : : // switch state to reading message data
758 : 153466 : in_data = true;
759 : :
760 : 153466 : return nCopy;
761 : : }
762 : :
763 : 245432 : int V1Transport::readData(Span<const uint8_t> msg_bytes)
764 : : {
765 : 245432 : AssertLockHeld(m_recv_mutex);
766 : 245432 : unsigned int nRemaining = hdr.nMessageSize - nDataPos;
767 [ + + ]: 245432 : unsigned int nCopy = std::min<unsigned int>(nRemaining, msg_bytes.size());
768 : :
769 [ + + ]: 245432 : if (vRecv.size() < nDataPos + nCopy) {
770 : : // Allocate up to 256 KiB ahead, but never more than the total message size.
771 [ + + ]: 312864 : vRecv.resize(std::min(hdr.nMessageSize, nDataPos + nCopy + 256 * 1024));
772 : : }
773 : :
774 : 245432 : hasher.Write(msg_bytes.first(nCopy));
775 : 245432 : memcpy(&vRecv[nDataPos], msg_bytes.data(), nCopy);
776 : 245432 : nDataPos += nCopy;
777 : :
778 : 245432 : return nCopy;
779 : : }
780 : :
781 : 153465 : const uint256& V1Transport::GetMessageHash() const
782 : : {
783 : 153465 : AssertLockHeld(m_recv_mutex);
784 [ + - - + ]: 153465 : assert(CompleteInternal());
785 [ + - ]: 153465 : if (data_hash.IsNull())
786 : 153465 : hasher.Finalize(data_hash);
787 : 153465 : return data_hash;
788 : : }
789 : :
790 : 153465 : CNetMessage V1Transport::GetReceivedMessage(const std::chrono::microseconds time, bool& reject_message)
791 : : {
792 : 153465 : AssertLockNotHeld(m_recv_mutex);
793 : : // Initialize out parameter
794 : 153465 : reject_message = false;
795 : : // decompose a single CNetMessage from the TransportDeserializer
796 : 153465 : LOCK(m_recv_mutex);
797 [ + - ]: 153465 : CNetMessage msg(std::move(vRecv));
798 : :
799 : : // store message type string, time, and sizes
800 [ + - ]: 153465 : msg.m_type = hdr.GetMessageType();
801 : 153465 : msg.m_time = time;
802 : 153465 : msg.m_message_size = hdr.nMessageSize;
803 : 153465 : msg.m_raw_message_size = hdr.nMessageSize + CMessageHeader::HEADER_SIZE;
804 : :
805 [ + - ]: 153465 : uint256 hash = GetMessageHash();
806 : :
807 : : // We just received a message off the wire, harvest entropy from the time (and the message checksum)
808 : 153465 : RandAddEvent(ReadLE32(hash.begin()));
809 : :
810 : : // Check checksum and header message type string
811 [ + + ]: 153465 : if (memcmp(hash.begin(), hdr.pchChecksum, CMessageHeader::CHECKSUM_SIZE) != 0) {
812 [ + - + - : 2 : LogDebug(BCLog::NET, "Header error: Wrong checksum (%s, %u bytes), expected %s was %s, peer=%d\n",
+ - + - +
- + - ]
813 : : SanitizeString(msg.m_type), msg.m_message_size,
814 : : HexStr(Span{hash}.first(CMessageHeader::CHECKSUM_SIZE)),
815 : : HexStr(hdr.pchChecksum),
816 : : m_node_id);
817 : 1 : reject_message = true;
818 [ + - + + ]: 153464 : } else if (!hdr.IsMessageTypeValid()) {
819 [ + - + - : 162 : LogDebug(BCLog::NET, "Header error: Invalid message type (%s, %u bytes), peer=%d\n",
+ - + - +
- ]
820 : : SanitizeString(hdr.GetMessageType()), msg.m_message_size, m_node_id);
821 : 81 : reject_message = true;
822 : : }
823 : :
824 : : // Always reset the network deserializer (prepare for the next message)
825 [ + - ]: 153465 : Reset();
826 [ + - ]: 153465 : return msg;
827 : 153465 : }
828 : :
829 : 158607 : bool V1Transport::SetMessageToSend(CSerializedNetMsg& msg) noexcept
830 : : {
831 : 158607 : AssertLockNotHeld(m_send_mutex);
832 : : // Determine whether a new message can be set.
833 : 158607 : LOCK(m_send_mutex);
834 [ + - + + ]: 158607 : if (m_sending_header || m_bytes_sent < m_message_to_send.data.size()) return false;
835 : :
836 : : // create dbl-sha256 checksum
837 : 158182 : uint256 hash = Hash(msg.data);
838 : :
839 : : // create header
840 : 158182 : CMessageHeader hdr(m_magic_bytes, msg.m_type.c_str(), msg.data.size());
841 [ + + ]: 158182 : memcpy(hdr.pchChecksum, hash.begin(), CMessageHeader::CHECKSUM_SIZE);
842 : :
843 : : // serialize header
844 [ + + ]: 158182 : m_header_to_send.clear();
845 : 158182 : VectorWriter{m_header_to_send, 0, hdr};
846 : :
847 : : // update state
848 : 158182 : m_message_to_send = std::move(msg);
849 : 158182 : m_sending_header = true;
850 : 158182 : m_bytes_sent = 0;
851 : 158182 : return true;
852 : 158607 : }
853 : :
854 : 1285955 : Transport::BytesToSend V1Transport::GetBytesToSend(bool have_next_message) const noexcept
855 : : {
856 : 1285955 : AssertLockNotHeld(m_send_mutex);
857 : 1285955 : LOCK(m_send_mutex);
858 [ + + ]: 1285955 : if (m_sending_header) {
859 [ + + ]: 158203 : return {Span{m_header_to_send}.subspan(m_bytes_sent),
860 : : // We have more to send after the header if the message has payload, or if there
861 : : // is a next message after that.
862 [ + + + + ]: 158203 : have_next_message || !m_message_to_send.data.empty(),
863 : 158203 : m_message_to_send.m_type
864 : 158203 : };
865 : : } else {
866 : 1127752 : return {Span{m_message_to_send.data}.subspan(m_bytes_sent),
867 : : // We only have more to send after this message's payload if there is another
868 : : // message.
869 : : have_next_message,
870 : 1127752 : m_message_to_send.m_type
871 : 1127752 : };
872 : : }
873 : 1285955 : }
874 : :
875 : 311773 : void V1Transport::MarkBytesSent(size_t bytes_sent) noexcept
876 : : {
877 : 311773 : AssertLockNotHeld(m_send_mutex);
878 : 311773 : LOCK(m_send_mutex);
879 : 311773 : m_bytes_sent += bytes_sent;
880 [ + + + - ]: 311773 : if (m_sending_header && m_bytes_sent == m_header_to_send.size()) {
881 : : // We're done sending a message's header. Switch to sending its data bytes.
882 : 158178 : m_sending_header = false;
883 : 158178 : m_bytes_sent = 0;
884 [ + - + + ]: 153595 : } else if (!m_sending_header && m_bytes_sent == m_message_to_send.data.size()) {
885 : : // We're done sending a message's data. Wipe the data vector to reduce memory consumption.
886 : 153148 : ClearShrink(m_message_to_send.data);
887 : 153148 : m_bytes_sent = 0;
888 : : }
889 : 311773 : }
890 : :
891 : 316396 : size_t V1Transport::GetSendMemoryUsage() const noexcept
892 : : {
893 : 316396 : AssertLockNotHeld(m_send_mutex);
894 : 316396 : LOCK(m_send_mutex);
895 : : // Don't count sending-side fields besides m_message_to_send, as they're all small and bounded.
896 [ + - ]: 316396 : return m_message_to_send.GetMemoryUsage();
897 : 316396 : }
898 : :
899 : : namespace {
900 : :
901 : : /** List of short messages as defined in BIP324, in order.
902 : : *
903 : : * Only message types that are actually implemented in this codebase need to be listed, as other
904 : : * messages get ignored anyway - whether we know how to decode them or not.
905 : : */
906 : : const std::array<std::string, 33> V2_MESSAGE_IDS = {
907 : : "", // 12 bytes follow encoding the message type like in V1
908 : : NetMsgType::ADDR,
909 : : NetMsgType::BLOCK,
910 : : NetMsgType::BLOCKTXN,
911 : : NetMsgType::CMPCTBLOCK,
912 : : NetMsgType::FEEFILTER,
913 : : NetMsgType::FILTERADD,
914 : : NetMsgType::FILTERCLEAR,
915 : : NetMsgType::FILTERLOAD,
916 : : NetMsgType::GETBLOCKS,
917 : : NetMsgType::GETBLOCKTXN,
918 : : NetMsgType::GETDATA,
919 : : NetMsgType::GETHEADERS,
920 : : NetMsgType::HEADERS,
921 : : NetMsgType::INV,
922 : : NetMsgType::MEMPOOL,
923 : : NetMsgType::MERKLEBLOCK,
924 : : NetMsgType::NOTFOUND,
925 : : NetMsgType::PING,
926 : : NetMsgType::PONG,
927 : : NetMsgType::SENDCMPCT,
928 : : NetMsgType::TX,
929 : : NetMsgType::GETCFILTERS,
930 : : NetMsgType::CFILTER,
931 : : NetMsgType::GETCFHEADERS,
932 : : NetMsgType::CFHEADERS,
933 : : NetMsgType::GETCFCHECKPT,
934 : : NetMsgType::CFCHECKPT,
935 : : NetMsgType::ADDRV2,
936 : : // Unimplemented message types that are assigned in BIP324:
937 : : "",
938 : : "",
939 : : "",
940 : : ""
941 : : };
942 : :
943 : : class V2MessageMap
944 : : {
945 : : std::unordered_map<std::string, uint8_t> m_map;
946 : :
947 : : public:
948 : 1203 : V2MessageMap() noexcept
949 : 1203 : {
950 [ + + ]: 39699 : for (size_t i = 1; i < std::size(V2_MESSAGE_IDS); ++i) {
951 : 38496 : m_map.emplace(V2_MESSAGE_IDS[i], i);
952 : : }
953 : 1203 : }
954 : :
955 : 8629 : std::optional<uint8_t> operator()(const std::string& message_name) const noexcept
956 : : {
957 : 8629 : auto it = m_map.find(message_name);
958 [ + + ]: 8629 : if (it == m_map.end()) return std::nullopt;
959 : 7734 : return it->second;
960 : : }
961 : : };
962 : :
963 : : const V2MessageMap V2_MESSAGE_MAP;
964 : :
965 : 275 : std::vector<uint8_t> GenerateRandomGarbage() noexcept
966 : : {
967 : 275 : std::vector<uint8_t> ret;
968 : 275 : FastRandomContext rng;
969 : 550 : ret.resize(rng.randrange(V2Transport::MAX_GARBAGE_LEN + 1));
970 : 275 : rng.fillrand(MakeWritableByteSpan(ret));
971 : 275 : return ret;
972 : 275 : }
973 : :
974 : : } // namespace
975 : :
976 : 269 : void V2Transport::StartSendingHandshake() noexcept
977 : : {
978 : 269 : AssertLockHeld(m_send_mutex);
979 : 269 : Assume(m_send_state == SendState::AWAITING_KEY);
980 : 269 : Assume(m_send_buffer.empty());
981 : : // Initialize the send buffer with ellswift pubkey + provided garbage.
982 : 269 : m_send_buffer.resize(EllSwiftPubKey::size() + m_send_garbage.size());
983 : 269 : std::copy(std::begin(m_cipher.GetOurPubKey()), std::end(m_cipher.GetOurPubKey()), MakeWritableByteSpan(m_send_buffer).begin());
984 : 269 : std::copy(m_send_garbage.begin(), m_send_garbage.end(), m_send_buffer.begin() + EllSwiftPubKey::size());
985 : : // We cannot wipe m_send_garbage as it will still be used as AAD later in the handshake.
986 : 269 : }
987 : :
988 : 275 : V2Transport::V2Transport(NodeId nodeid, bool initiating, const CKey& key, Span<const std::byte> ent32, std::vector<uint8_t> garbage) noexcept
989 : 275 : : m_cipher{key, ent32}, m_initiating{initiating}, m_nodeid{nodeid},
990 : 275 : m_v1_fallback{nodeid},
991 [ + + ]: 275 : m_recv_state{initiating ? RecvState::KEY : RecvState::KEY_MAYBE_V1},
992 [ + + ]: 275 : m_send_garbage{std::move(garbage)},
993 [ + + + + ]: 710 : m_send_state{initiating ? SendState::AWAITING_KEY : SendState::MAYBE_V1}
994 : : {
995 [ + + ]: 275 : Assume(m_send_garbage.size() <= MAX_GARBAGE_LEN);
996 : : // Start sending immediately if we're the initiator of the connection.
997 [ + + ]: 275 : if (initiating) {
998 : 115 : LOCK(m_send_mutex);
999 [ + - ]: 115 : StartSendingHandshake();
1000 : 115 : }
1001 : 275 : }
1002 : :
1003 : 275 : V2Transport::V2Transport(NodeId nodeid, bool initiating) noexcept
1004 : 550 : : V2Transport{nodeid, initiating, GenerateRandomKey(),
1005 : 550 : MakeByteSpan(GetRandHash()), GenerateRandomGarbage()} {}
1006 : :
1007 : 17092 : void V2Transport::SetReceiveState(RecvState recv_state) noexcept
1008 : : {
1009 : 17092 : AssertLockHeld(m_recv_mutex);
1010 : : // Enforce allowed state transitions.
1011 : 17092 : switch (m_recv_state) {
1012 : : case RecvState::KEY_MAYBE_V1:
1013 : : Assume(recv_state == RecvState::KEY || recv_state == RecvState::V1);
1014 : : break;
1015 : : case RecvState::KEY:
1016 : : Assume(recv_state == RecvState::GARB_GARBTERM);
1017 : : break;
1018 : : case RecvState::GARB_GARBTERM:
1019 : : Assume(recv_state == RecvState::VERSION);
1020 : : break;
1021 : : case RecvState::VERSION:
1022 : : Assume(recv_state == RecvState::APP);
1023 : : break;
1024 : : case RecvState::APP:
1025 : : Assume(recv_state == RecvState::APP_READY);
1026 : : break;
1027 : : case RecvState::APP_READY:
1028 : : Assume(recv_state == RecvState::APP);
1029 : : break;
1030 : 17092 : case RecvState::V1:
1031 : 17092 : Assume(false); // V1 state cannot be left
1032 : 17092 : break;
1033 : : }
1034 : : // Change state.
1035 : 17092 : m_recv_state = recv_state;
1036 : 17092 : }
1037 : :
1038 : 424 : void V2Transport::SetSendState(SendState send_state) noexcept
1039 : : {
1040 : 424 : AssertLockHeld(m_send_mutex);
1041 : : // Enforce allowed state transitions.
1042 : 424 : switch (m_send_state) {
1043 : : case SendState::MAYBE_V1:
1044 : : Assume(send_state == SendState::V1 || send_state == SendState::AWAITING_KEY);
1045 : : break;
1046 : : case SendState::AWAITING_KEY:
1047 : : Assume(send_state == SendState::READY);
1048 : : break;
1049 : 424 : case SendState::READY:
1050 : 424 : case SendState::V1:
1051 : 424 : Assume(false); // Final states
1052 : 424 : break;
1053 : : }
1054 : : // Change state.
1055 : 424 : m_send_state = send_state;
1056 : 424 : }
1057 : :
1058 : 11711 : bool V2Transport::ReceivedMessageComplete() const noexcept
1059 : : {
1060 : 11711 : AssertLockNotHeld(m_recv_mutex);
1061 : 11711 : LOCK(m_recv_mutex);
1062 [ + + ]: 11711 : if (m_recv_state == RecvState::V1) return m_v1_fallback.ReceivedMessageComplete();
1063 : :
1064 : 11256 : return m_recv_state == RecvState::APP_READY;
1065 : 11711 : }
1066 : :
1067 : 161 : void V2Transport::ProcessReceivedMaybeV1Bytes() noexcept
1068 : : {
1069 : 161 : AssertLockHeld(m_recv_mutex);
1070 : 161 : AssertLockNotHeld(m_send_mutex);
1071 : 161 : Assume(m_recv_state == RecvState::KEY_MAYBE_V1);
1072 : : // We still have to determine if this is a v1 or v2 connection. The bytes being received could
1073 : : // be the beginning of either a v1 packet (network magic + "version\x00\x00\x00\x00\x00"), or
1074 : : // of a v2 public key. BIP324 specifies that a mismatch with this 16-byte string should trigger
1075 : : // sending of the key.
1076 : 161 : std::array<uint8_t, V1_PREFIX_LEN> v1_prefix = {0, 0, 0, 0, 'v', 'e', 'r', 's', 'i', 'o', 'n', 0, 0, 0, 0, 0};
1077 : 161 : std::copy(std::begin(Params().MessageStart()), std::end(Params().MessageStart()), v1_prefix.begin());
1078 : 161 : Assume(m_recv_buffer.size() <= v1_prefix.size());
1079 [ + + ]: 161 : if (!std::equal(m_recv_buffer.begin(), m_recv_buffer.end(), v1_prefix.begin())) {
1080 : : // Mismatch with v1 prefix, so we can assume a v2 connection.
1081 : 154 : SetReceiveState(RecvState::KEY); // Convert to KEY state, leaving received bytes around.
1082 : : // Transition the sender to AWAITING_KEY state and start sending.
1083 : 154 : LOCK(m_send_mutex);
1084 : 154 : SetSendState(SendState::AWAITING_KEY);
1085 [ + - ]: 154 : StartSendingHandshake();
1086 [ + + ]: 161 : } else if (m_recv_buffer.size() == v1_prefix.size()) {
1087 : : // Full match with the v1 prefix, so fall back to v1 behavior.
1088 : 6 : LOCK(m_send_mutex);
1089 : 6 : Span<const uint8_t> feedback{m_recv_buffer};
1090 : : // Feed already received bytes to v1 transport. It should always accept these, because it's
1091 : : // less than the size of a v1 header, and these are the first bytes fed to m_v1_fallback.
1092 : 6 : bool ret = m_v1_fallback.ReceivedBytes(feedback);
1093 : 6 : Assume(feedback.empty());
1094 : 6 : Assume(ret);
1095 : 6 : SetReceiveState(RecvState::V1);
1096 : 6 : SetSendState(SendState::V1);
1097 : : // Reset v2 transport buffers to save memory.
1098 : 6 : ClearShrink(m_recv_buffer);
1099 [ + - ]: 6 : ClearShrink(m_send_buffer);
1100 : 6 : } else {
1101 : : // We have not received enough to distinguish v1 from v2 yet. Wait until more bytes come.
1102 : : }
1103 : 161 : }
1104 : :
1105 : 320 : bool V2Transport::ProcessReceivedKeyBytes() noexcept
1106 : : {
1107 : 320 : AssertLockHeld(m_recv_mutex);
1108 : 320 : AssertLockNotHeld(m_send_mutex);
1109 : 320 : Assume(m_recv_state == RecvState::KEY);
1110 : 320 : Assume(m_recv_buffer.size() <= EllSwiftPubKey::size());
1111 : :
1112 : : // As a special exception, if bytes 4-16 of the key on a responder connection match the
1113 : : // corresponding bytes of a V1 version message, but bytes 0-4 don't match the network magic
1114 : : // (if they did, we'd have switched to V1 state already), assume this is a peer from
1115 : : // another network, and disconnect them. They will almost certainly disconnect us too when
1116 : : // they receive our uniformly random key and garbage, but detecting this case specially
1117 : : // means we can log it.
1118 : 320 : static constexpr std::array<uint8_t, 12> MATCH = {'v', 'e', 'r', 's', 'i', 'o', 'n', 0, 0, 0, 0, 0};
1119 : 320 : static constexpr size_t OFFSET = std::tuple_size_v<MessageStartChars>;
1120 [ + + + - ]: 320 : if (!m_initiating && m_recv_buffer.size() >= OFFSET + MATCH.size()) {
1121 [ + + ]: 204 : if (std::equal(MATCH.begin(), MATCH.end(), m_recv_buffer.begin() + OFFSET)) {
1122 [ + - ]: 2 : LogDebug(BCLog::NET, "V2 transport error: V1 peer with wrong MessageStart %s\n",
1123 : : HexStr(Span(m_recv_buffer).first(OFFSET)));
1124 : 2 : return false;
1125 : : }
1126 : : }
1127 : :
1128 [ + + ]: 318 : if (m_recv_buffer.size() == EllSwiftPubKey::size()) {
1129 : : // Other side's key has been fully received, and can now be Diffie-Hellman combined with
1130 : : // our key to initialize the encryption ciphers.
1131 : :
1132 : : // Initialize the ciphers.
1133 : 264 : EllSwiftPubKey ellswift(MakeByteSpan(m_recv_buffer));
1134 : 264 : LOCK(m_send_mutex);
1135 : 264 : m_cipher.Initialize(ellswift, m_initiating);
1136 : :
1137 : : // Switch receiver state to GARB_GARBTERM.
1138 : 264 : SetReceiveState(RecvState::GARB_GARBTERM);
1139 [ + - ]: 264 : m_recv_buffer.clear();
1140 : :
1141 : : // Switch sender state to READY.
1142 : 264 : SetSendState(SendState::READY);
1143 : :
1144 : : // Append the garbage terminator to the send buffer.
1145 : 264 : m_send_buffer.resize(m_send_buffer.size() + BIP324Cipher::GARBAGE_TERMINATOR_LEN);
1146 : 528 : std::copy(m_cipher.GetSendGarbageTerminator().begin(),
1147 : 264 : m_cipher.GetSendGarbageTerminator().end(),
1148 : 264 : MakeWritableByteSpan(m_send_buffer).last(BIP324Cipher::GARBAGE_TERMINATOR_LEN).begin());
1149 : :
1150 : : // Construct version packet in the send buffer, with the sent garbage data as AAD.
1151 : 264 : m_send_buffer.resize(m_send_buffer.size() + BIP324Cipher::EXPANSION + VERSION_CONTENTS.size());
1152 : 264 : m_cipher.Encrypt(
1153 : : /*contents=*/VERSION_CONTENTS,
1154 : 264 : /*aad=*/MakeByteSpan(m_send_garbage),
1155 : : /*ignore=*/false,
1156 : 264 : /*output=*/MakeWritableByteSpan(m_send_buffer).last(BIP324Cipher::EXPANSION + VERSION_CONTENTS.size()));
1157 : : // We no longer need the garbage.
1158 [ + - ]: 264 : ClearShrink(m_send_garbage);
1159 : 264 : } else {
1160 : : // We still have to receive more key bytes.
1161 : : }
1162 : : return true;
1163 : : }
1164 : :
1165 : 540269 : bool V2Transport::ProcessReceivedGarbageBytes() noexcept
1166 : : {
1167 : 540269 : AssertLockHeld(m_recv_mutex);
1168 : 540269 : Assume(m_recv_state == RecvState::GARB_GARBTERM);
1169 : 540269 : Assume(m_recv_buffer.size() <= MAX_GARBAGE_LEN + BIP324Cipher::GARBAGE_TERMINATOR_LEN);
1170 [ + + ]: 540269 : if (m_recv_buffer.size() >= BIP324Cipher::GARBAGE_TERMINATOR_LEN) {
1171 [ + + ]: 536309 : if (std::ranges::equal(MakeByteSpan(m_recv_buffer).last(BIP324Cipher::GARBAGE_TERMINATOR_LEN), m_cipher.GetReceiveGarbageTerminator())) {
1172 : : // Garbage terminator received. Store garbage to authenticate it as AAD later.
1173 : 258 : m_recv_aad = std::move(m_recv_buffer);
1174 : 258 : m_recv_aad.resize(m_recv_aad.size() - BIP324Cipher::GARBAGE_TERMINATOR_LEN);
1175 [ - + ]: 258 : m_recv_buffer.clear();
1176 : 258 : SetReceiveState(RecvState::VERSION);
1177 [ + + ]: 536051 : } else if (m_recv_buffer.size() == MAX_GARBAGE_LEN + BIP324Cipher::GARBAGE_TERMINATOR_LEN) {
1178 : : // We've reached the maximum length for garbage + garbage terminator, and the
1179 : : // terminator still does not match. Abort.
1180 [ + - ]: 4 : LogDebug(BCLog::NET, "V2 transport error: missing garbage terminator, peer=%d\n", m_nodeid);
1181 : 4 : return false;
1182 : : } else {
1183 : : // We still need to receive more garbage and/or garbage terminator bytes.
1184 : : }
1185 : : } else {
1186 : : // We have less than GARBAGE_TERMINATOR_LEN (16) bytes, so we certainly need to receive
1187 : : // more first.
1188 : : }
1189 : : return true;
1190 : : }
1191 : :
1192 : 130191 : bool V2Transport::ProcessReceivedPacketBytes() noexcept
1193 : : {
1194 : 130191 : AssertLockHeld(m_recv_mutex);
1195 : 130191 : Assume(m_recv_state == RecvState::VERSION || m_recv_state == RecvState::APP);
1196 : :
1197 : : // The maximum permitted contents length for a packet, consisting of:
1198 : : // - 0x00 byte: indicating long message type encoding
1199 : : // - 12 bytes of message type
1200 : : // - payload
1201 : 130191 : static constexpr size_t MAX_CONTENTS_LEN =
1202 : : 1 + CMessageHeader::MESSAGE_TYPE_SIZE +
1203 : : std::min<size_t>(MAX_SIZE, MAX_PROTOCOL_MESSAGE_LENGTH);
1204 : :
1205 [ + + ]: 130191 : if (m_recv_buffer.size() == BIP324Cipher::LENGTH_LEN) {
1206 : : // Length descriptor received.
1207 : 64341 : m_recv_len = m_cipher.DecryptLength(MakeByteSpan(m_recv_buffer));
1208 [ + + ]: 64341 : if (m_recv_len > MAX_CONTENTS_LEN) {
1209 [ + - ]: 10 : LogDebug(BCLog::NET, "V2 transport error: packet too large (%u bytes), peer=%d\n", m_recv_len, m_nodeid);
1210 : 10 : return false;
1211 : : }
1212 [ + + + + ]: 65850 : } else if (m_recv_buffer.size() > BIP324Cipher::LENGTH_LEN && m_recv_buffer.size() == m_recv_len + BIP324Cipher::EXPANSION) {
1213 : : // Ciphertext received, decrypt it into m_recv_decode_buffer.
1214 : : // Note that it is impossible to reach this branch without hitting the branch above first,
1215 : : // as GetMaxBytesToProcess only allows up to LENGTH_LEN into the buffer before that point.
1216 : 64331 : m_recv_decode_buffer.resize(m_recv_len);
1217 : 64331 : bool ignore{false};
1218 : 128662 : bool ret = m_cipher.Decrypt(
1219 : 64331 : /*input=*/MakeByteSpan(m_recv_buffer).subspan(BIP324Cipher::LENGTH_LEN),
1220 : 64331 : /*aad=*/MakeByteSpan(m_recv_aad),
1221 : : /*ignore=*/ignore,
1222 : : /*contents=*/MakeWritableByteSpan(m_recv_decode_buffer));
1223 [ + + ]: 64331 : if (!ret) {
1224 [ + - ]: 12 : LogDebug(BCLog::NET, "V2 transport error: packet decryption failure (%u bytes), peer=%d\n", m_recv_len, m_nodeid);
1225 : 12 : return false;
1226 : : }
1227 : : // We have decrypted a valid packet with the AAD we expected, so clear the expected AAD.
1228 : 64319 : ClearShrink(m_recv_aad);
1229 : : // Feed the last 4 bytes of the Poly1305 authentication tag (and its timing) into our RNG.
1230 : 64319 : RandAddEvent(ReadLE32(m_recv_buffer.data() + m_recv_buffer.size() - 4));
1231 : :
1232 : : // At this point we have a valid packet decrypted into m_recv_decode_buffer. If it's not a
1233 : : // decoy, which we simply ignore, use the current state to decide what to do with it.
1234 [ + + ]: 64319 : if (!ignore) {
1235 [ + + - ]: 8333 : switch (m_recv_state) {
1236 : 256 : case RecvState::VERSION:
1237 : : // Version message received; transition to application phase. The contents is
1238 : : // ignored, but can be used for future extensions.
1239 : 256 : SetReceiveState(RecvState::APP);
1240 : 256 : break;
1241 : 8077 : case RecvState::APP:
1242 : : // Application message decrypted correctly. It can be extracted using GetMessage().
1243 : 8077 : SetReceiveState(RecvState::APP_READY);
1244 : 8077 : break;
1245 : : default:
1246 : : // Any other state is invalid (this function should not have been called).
1247 : : Assume(false);
1248 : : }
1249 : : }
1250 : : // Wipe the receive buffer where the next packet will be received into.
1251 : 64319 : ClearShrink(m_recv_buffer);
1252 : : // In all but APP_READY state, we can wipe the decoded contents.
1253 [ + + ]: 64319 : if (m_recv_state != RecvState::APP_READY) ClearShrink(m_recv_decode_buffer);
1254 : : } else {
1255 : : // We either have less than 3 bytes, so we don't know the packet's length yet, or more
1256 : : // than 3 bytes but less than the packet's full ciphertext. Wait until those arrive.
1257 : : }
1258 : : return true;
1259 : : }
1260 : :
1261 : 672790 : size_t V2Transport::GetMaxBytesToProcess() noexcept
1262 : : {
1263 : 672790 : AssertLockHeld(m_recv_mutex);
1264 [ + + + + : 672790 : switch (m_recv_state) {
- - + ]
1265 : 161 : case RecvState::KEY_MAYBE_V1:
1266 : : // During the KEY_MAYBE_V1 state we do not allow more than the length of v1 prefix into the
1267 : : // receive buffer.
1268 : 161 : Assume(m_recv_buffer.size() <= V1_PREFIX_LEN);
1269 : : // As long as we're not sure if this is a v1 or v2 connection, don't receive more than what
1270 : : // is strictly necessary to distinguish the two (16 bytes). If we permitted more than
1271 : : // the v1 header size (24 bytes), we may not be able to feed the already-received bytes
1272 : : // back into the m_v1_fallback V1 transport.
1273 : 161 : return V1_PREFIX_LEN - m_recv_buffer.size();
1274 : 320 : case RecvState::KEY:
1275 : : // During the KEY state, we only allow the 64-byte key into the receive buffer.
1276 : 320 : Assume(m_recv_buffer.size() <= EllSwiftPubKey::size());
1277 : : // As long as we have not received the other side's public key, don't receive more than
1278 : : // that (64 bytes), as garbage follows, and locating the garbage terminator requires the
1279 : : // key exchange first.
1280 : 320 : return EllSwiftPubKey::size() - m_recv_buffer.size();
1281 : : case RecvState::GARB_GARBTERM:
1282 : : // Process garbage bytes one by one (because terminator may appear anywhere).
1283 : : return 1;
1284 : 130191 : case RecvState::VERSION:
1285 : 130191 : case RecvState::APP:
1286 : : // These three states all involve decoding a packet. Process the length descriptor first,
1287 : : // so that we know where the current packet ends (and we don't process bytes from the next
1288 : : // packet or decoy yet). Then, process the ciphertext bytes of the current packet.
1289 [ + + ]: 130191 : if (m_recv_buffer.size() < BIP324Cipher::LENGTH_LEN) {
1290 : 64353 : return BIP324Cipher::LENGTH_LEN - m_recv_buffer.size();
1291 : : } else {
1292 : : // Note that BIP324Cipher::EXPANSION is the total difference between contents size
1293 : : // and encoded packet size, which includes the 3 bytes due to the packet length.
1294 : : // When transitioning from receiving the packet length to receiving its ciphertext,
1295 : : // the encrypted packet length is left in the receive buffer.
1296 : 65838 : return BIP324Cipher::EXPANSION + m_recv_len - m_recv_buffer.size();
1297 : : }
1298 : 1849 : case RecvState::APP_READY:
1299 : : // No bytes can be processed until GetMessage() is called.
1300 : 1849 : return 0;
1301 : 0 : case RecvState::V1:
1302 : : // Not allowed (must be dealt with by the caller).
1303 : 0 : Assume(false);
1304 : 0 : return 0;
1305 : : }
1306 : 0 : Assume(false); // unreachable
1307 : 0 : return 0;
1308 : : }
1309 : :
1310 : 11021 : bool V2Transport::ReceivedBytes(Span<const uint8_t>& msg_bytes) noexcept
1311 : : {
1312 : 11021 : AssertLockNotHeld(m_recv_mutex);
1313 : : /** How many bytes to allocate in the receive buffer at most above what is received so far. */
1314 : 11021 : static constexpr size_t MAX_RESERVE_AHEAD = 256 * 1024;
1315 : :
1316 : 11021 : LOCK(m_recv_mutex);
1317 [ + + ]: 11021 : if (m_recv_state == RecvState::V1) return m_v1_fallback.ReceivedBytes(msg_bytes);
1318 : :
1319 : : // Process the provided bytes in msg_bytes in a loop. In each iteration a nonzero number of
1320 : : // bytes (decided by GetMaxBytesToProcess) are taken from the beginning om msg_bytes, and
1321 : : // appended to m_recv_buffer. Then, depending on the receiver state, one of the
1322 : : // ProcessReceived*Bytes functions is called to process the bytes in that buffer.
1323 [ + + ]: 681479 : while (!msg_bytes.empty()) {
1324 : : // Decide how many bytes to copy from msg_bytes to m_recv_buffer.
1325 : 672790 : size_t max_read = GetMaxBytesToProcess();
1326 : :
1327 : : // Reserve space in the buffer if there is not enough.
1328 [ + + + + ]: 681494 : if (m_recv_buffer.size() + std::min(msg_bytes.size(), max_read) > m_recv_buffer.capacity()) {
1329 [ + + - ]: 129013 : switch (m_recv_state) {
1330 : 272 : case RecvState::KEY_MAYBE_V1:
1331 : 272 : case RecvState::KEY:
1332 : 272 : case RecvState::GARB_GARBTERM:
1333 : : // During the initial states (key/garbage), allocate once to fit the maximum (4111
1334 : : // bytes).
1335 : 272 : m_recv_buffer.reserve(MAX_GARBAGE_LEN + BIP324Cipher::GARBAGE_TERMINATOR_LEN);
1336 : 272 : break;
1337 : 128741 : case RecvState::VERSION:
1338 : 128741 : case RecvState::APP: {
1339 : : // During states where a packet is being received, as much as is expected but never
1340 : : // more than MAX_RESERVE_AHEAD bytes in addition to what is received so far.
1341 : : // This means attackers that want to cause us to waste allocated memory are limited
1342 : : // to MAX_RESERVE_AHEAD above the largest allowed message contents size, and to
1343 : : // MAX_RESERVE_AHEAD more than they've actually sent us.
1344 [ + + ]: 128741 : size_t alloc_add = std::min(max_read, msg_bytes.size() + MAX_RESERVE_AHEAD);
1345 : 128741 : m_recv_buffer.reserve(m_recv_buffer.size() + alloc_add);
1346 : 128741 : break;
1347 : : }
1348 : : case RecvState::APP_READY:
1349 : : // The buffer is empty in this state.
1350 : : Assume(m_recv_buffer.empty());
1351 : : break;
1352 : : case RecvState::V1:
1353 : : // Should have bailed out above.
1354 : : Assume(false);
1355 : : break;
1356 : : }
1357 : : }
1358 : :
1359 : : // Can't read more than provided input.
1360 [ + + ]: 672790 : max_read = std::min(msg_bytes.size(), max_read);
1361 : : // Copy data to buffer.
1362 : 672790 : m_recv_buffer.insert(m_recv_buffer.end(), UCharCast(msg_bytes.data()), UCharCast(msg_bytes.data() + max_read));
1363 [ + + + + : 672790 : msg_bytes = msg_bytes.subspan(max_read);
- + ]
1364 : :
1365 : : // Process data in the buffer.
1366 [ + + + + : 672790 : switch (m_recv_state) {
- + ]
1367 : 161 : case RecvState::KEY_MAYBE_V1:
1368 : 161 : ProcessReceivedMaybeV1Bytes();
1369 [ + + ]: 161 : if (m_recv_state == RecvState::V1) return true;
1370 : : break;
1371 : :
1372 : 320 : case RecvState::KEY:
1373 [ + + ]: 320 : if (!ProcessReceivedKeyBytes()) return false;
1374 : : break;
1375 : :
1376 : 540269 : case RecvState::GARB_GARBTERM:
1377 [ + + ]: 540269 : if (!ProcessReceivedGarbageBytes()) return false;
1378 : : break;
1379 : :
1380 : 130191 : case RecvState::VERSION:
1381 : 130191 : case RecvState::APP:
1382 [ + + ]: 130191 : if (!ProcessReceivedPacketBytes()) return false;
1383 : : break;
1384 : :
1385 : : case RecvState::APP_READY:
1386 : : return true;
1387 : :
1388 : : case RecvState::V1:
1389 : : // We should have bailed out before.
1390 : : Assume(false);
1391 : : break;
1392 : : }
1393 : : // Make sure we have made progress before continuing.
1394 : : Assume(max_read > 0);
1395 : : }
1396 : :
1397 : : return true;
1398 : 11021 : }
1399 : :
1400 : 8077 : std::optional<std::string> V2Transport::GetMessageType(Span<const uint8_t>& contents) noexcept
1401 : : {
1402 [ - + ]: 8077 : if (contents.size() == 0) return std::nullopt; // Empty contents
1403 [ + + ]: 8077 : uint8_t first_byte = contents[0];
1404 [ + + ]: 8077 : contents = contents.subspan(1); // Strip first byte.
1405 : :
1406 [ + + ]: 8077 : if (first_byte != 0) {
1407 : : // Short (1 byte) encoding.
1408 [ + + ]: 7121 : if (first_byte < std::size(V2_MESSAGE_IDS)) {
1409 : : // Valid short message id.
1410 : 7120 : return V2_MESSAGE_IDS[first_byte];
1411 : : } else {
1412 : : // Unknown short message id.
1413 : 1 : return std::nullopt;
1414 : : }
1415 : : }
1416 : :
1417 [ + + ]: 956 : if (contents.size() < CMessageHeader::MESSAGE_TYPE_SIZE) {
1418 : 10 : return std::nullopt; // Long encoding needs 12 message type bytes.
1419 : : }
1420 : :
1421 : : size_t msg_type_len{0};
1422 [ + - + + ]: 8546 : while (msg_type_len < CMessageHeader::MESSAGE_TYPE_SIZE && contents[msg_type_len] != 0) {
1423 : : // Verify that message type bytes before the first 0x00 are in range.
1424 [ - + + - ]: 7600 : if (contents[msg_type_len] < ' ' || contents[msg_type_len] > 0x7F) {
1425 : 0 : return {};
1426 : : }
1427 : 7600 : ++msg_type_len;
1428 : : }
1429 : 946 : std::string ret{reinterpret_cast<const char*>(contents.data()), msg_type_len};
1430 [ + + ]: 4598 : while (msg_type_len < CMessageHeader::MESSAGE_TYPE_SIZE) {
1431 : : // Verify that message type bytes after the first 0x00 are also 0x00.
1432 [ + + ]: 3702 : if (contents[msg_type_len] != 0) return {};
1433 : 3652 : ++msg_type_len;
1434 : : }
1435 : : // Strip message type bytes of contents.
1436 : 896 : contents = contents.subspan(CMessageHeader::MESSAGE_TYPE_SIZE);
1437 : 896 : return ret;
1438 : 946 : }
1439 : :
1440 : 8309 : CNetMessage V2Transport::GetReceivedMessage(std::chrono::microseconds time, bool& reject_message) noexcept
1441 : : {
1442 : 8309 : AssertLockNotHeld(m_recv_mutex);
1443 : 8309 : LOCK(m_recv_mutex);
1444 [ + + ]: 8309 : if (m_recv_state == RecvState::V1) return m_v1_fallback.GetReceivedMessage(time, reject_message);
1445 : :
1446 : 8077 : Assume(m_recv_state == RecvState::APP_READY);
1447 : 8077 : Span<const uint8_t> contents{m_recv_decode_buffer};
1448 : 8077 : auto msg_type = GetMessageType(contents);
1449 : 8077 : CNetMessage msg{DataStream{}};
1450 : : // Note that BIP324Cipher::EXPANSION also includes the length descriptor size.
1451 [ + + ]: 8077 : msg.m_raw_message_size = m_recv_decode_buffer.size() + BIP324Cipher::EXPANSION;
1452 [ + + ]: 8077 : if (msg_type) {
1453 : 8016 : reject_message = false;
1454 : 8016 : msg.m_type = std::move(*msg_type);
1455 : 8016 : msg.m_time = time;
1456 : 8016 : msg.m_message_size = contents.size();
1457 : 8016 : msg.m_recv.resize(contents.size());
1458 : 8016 : std::copy(contents.begin(), contents.end(), UCharCast(msg.m_recv.data()));
1459 : : } else {
1460 [ + - ]: 61 : LogDebug(BCLog::NET, "V2 transport error: invalid message type (%u bytes contents), peer=%d\n", m_recv_decode_buffer.size(), m_nodeid);
1461 : 61 : reject_message = true;
1462 : : }
1463 : 8077 : ClearShrink(m_recv_decode_buffer);
1464 : 8077 : SetReceiveState(RecvState::APP);
1465 : :
1466 : 8077 : return msg;
1467 : 8077 : }
1468 : :
1469 : 9114 : bool V2Transport::SetMessageToSend(CSerializedNetMsg& msg) noexcept
1470 : : {
1471 : 9114 : AssertLockNotHeld(m_send_mutex);
1472 : 9114 : LOCK(m_send_mutex);
1473 [ + + ]: 9114 : if (m_send_state == SendState::V1) return m_v1_fallback.SetMessageToSend(msg);
1474 : : // We only allow adding a new message to be sent when in the READY state (so the packet cipher
1475 : : // is available) and the send buffer is empty. This limits the number of messages in the send
1476 : : // buffer to just one, and leaves the responsibility for queueing them up to the caller.
1477 [ + + + + ]: 8713 : if (!(m_send_state == SendState::READY && m_send_buffer.empty())) return false;
1478 : : // Construct contents (encoding message type + payload).
1479 : 8629 : std::vector<uint8_t> contents;
1480 : 8629 : auto short_message_id = V2_MESSAGE_MAP(msg.m_type);
1481 [ + + ]: 8629 : if (short_message_id) {
1482 : 7734 : contents.resize(1 + msg.data.size());
1483 : 7734 : contents[0] = *short_message_id;
1484 : 7734 : std::copy(msg.data.begin(), msg.data.end(), contents.begin() + 1);
1485 : : } else {
1486 : : // Initialize with zeroes, and then write the message type string starting at offset 1.
1487 : : // This means contents[0] and the unused positions in contents[1..13] remain 0x00.
1488 : 895 : contents.resize(1 + CMessageHeader::MESSAGE_TYPE_SIZE + msg.data.size(), 0);
1489 : 895 : std::copy(msg.m_type.begin(), msg.m_type.end(), contents.data() + 1);
1490 : 895 : std::copy(msg.data.begin(), msg.data.end(), contents.begin() + 1 + CMessageHeader::MESSAGE_TYPE_SIZE);
1491 : : }
1492 : : // Construct ciphertext in send buffer.
1493 : 8629 : m_send_buffer.resize(contents.size() + BIP324Cipher::EXPANSION);
1494 : 8629 : m_cipher.Encrypt(MakeByteSpan(contents), {}, false, MakeWritableByteSpan(m_send_buffer));
1495 : 8629 : m_send_type = msg.m_type;
1496 : : // Release memory
1497 : 8629 : ClearShrink(msg.data);
1498 : 8629 : return true;
1499 : 8629 : }
1500 : :
1501 : 56209 : Transport::BytesToSend V2Transport::GetBytesToSend(bool have_next_message) const noexcept
1502 : : {
1503 : 56209 : AssertLockNotHeld(m_send_mutex);
1504 : 56209 : LOCK(m_send_mutex);
1505 [ + + ]: 56209 : if (m_send_state == SendState::V1) return m_v1_fallback.GetBytesToSend(have_next_message);
1506 : :
1507 : 53884 : if (m_send_state == SendState::MAYBE_V1) Assume(m_send_buffer.empty());
1508 : 53884 : Assume(m_send_pos <= m_send_buffer.size());
1509 : 53884 : return {
1510 [ + + ]: 53884 : Span{m_send_buffer}.subspan(m_send_pos),
1511 : : // We only have more to send after the current m_send_buffer if there is a (next)
1512 : : // message to be sent, and we're capable of sending packets. */
1513 [ + + + + ]: 53884 : have_next_message && m_send_state == SendState::READY,
1514 : 53884 : m_send_type
1515 : 53884 : };
1516 : 56209 : }
1517 : :
1518 : 10565 : void V2Transport::MarkBytesSent(size_t bytes_sent) noexcept
1519 : : {
1520 : 10565 : AssertLockNotHeld(m_send_mutex);
1521 : 10565 : LOCK(m_send_mutex);
1522 [ + + + - ]: 10565 : if (m_send_state == SendState::V1) return m_v1_fallback.MarkBytesSent(bytes_sent);
1523 : :
1524 [ + + + + : 9777 : if (m_send_state == SendState::AWAITING_KEY && m_send_pos == 0 && bytes_sent > 0) {
+ - ]
1525 [ + - ]: 124 : LogDebug(BCLog::NET, "start sending v2 handshake to peer=%d\n", m_nodeid);
1526 : : }
1527 : :
1528 : 9777 : m_send_pos += bytes_sent;
1529 : 9777 : Assume(m_send_pos <= m_send_buffer.size());
1530 [ + + ]: 9777 : if (m_send_pos >= CMessageHeader::HEADER_SIZE) {
1531 : 9633 : m_sent_v1_header_worth = true;
1532 : : }
1533 : : // Wipe the buffer when everything is sent.
1534 [ + + ]: 9777 : if (m_send_pos == m_send_buffer.size()) {
1535 : 9001 : m_send_pos = 0;
1536 : 9001 : ClearShrink(m_send_buffer);
1537 : : }
1538 : 10565 : }
1539 : :
1540 : 146 : bool V2Transport::ShouldReconnectV1() const noexcept
1541 : : {
1542 : 146 : AssertLockNotHeld(m_send_mutex);
1543 : 146 : AssertLockNotHeld(m_recv_mutex);
1544 : : // Only outgoing connections need reconnection.
1545 [ + + ]: 146 : if (!m_initiating) return false;
1546 : :
1547 : 63 : LOCK(m_recv_mutex);
1548 : : // We only reconnect in the very first state and when the receive buffer is empty. Together
1549 : : // these conditions imply nothing has been received so far.
1550 [ + + ]: 63 : if (m_recv_state != RecvState::KEY) return false;
1551 [ + - ]: 3 : if (!m_recv_buffer.empty()) return false;
1552 : : // Check if we've sent enough for the other side to disconnect us (if it was V1).
1553 : 3 : LOCK(m_send_mutex);
1554 [ + - ]: 3 : return m_sent_v1_header_worth;
1555 : 66 : }
1556 : :
1557 : 18193 : size_t V2Transport::GetSendMemoryUsage() const noexcept
1558 : : {
1559 : 18193 : AssertLockNotHeld(m_send_mutex);
1560 : 18193 : LOCK(m_send_mutex);
1561 [ + + ]: 18193 : if (m_send_state == SendState::V1) return m_v1_fallback.GetSendMemoryUsage();
1562 : :
1563 [ + + ]: 17417 : return sizeof(m_send_buffer) + memusage::DynamicUsage(m_send_buffer);
1564 : 18193 : }
1565 : :
1566 : 2012 : Transport::Info V2Transport::GetInfo() const noexcept
1567 : : {
1568 : 2012 : AssertLockNotHeld(m_recv_mutex);
1569 : 2012 : LOCK(m_recv_mutex);
1570 [ + + ]: 2012 : if (m_recv_state == RecvState::V1) return m_v1_fallback.GetInfo();
1571 : :
1572 [ + + ]: 1970 : Transport::Info info;
1573 : :
1574 : : // Do not report v2 and session ID until the version packet has been received
1575 : : // and verified (confirming that the other side very likely has the same keys as us).
1576 [ + + ]: 1970 : if (m_recv_state != RecvState::KEY_MAYBE_V1 && m_recv_state != RecvState::KEY &&
1577 : : m_recv_state != RecvState::GARB_GARBTERM && m_recv_state != RecvState::VERSION) {
1578 : 1898 : info.transport_type = TransportProtocolType::V2;
1579 : 1898 : info.session_id = uint256(MakeUCharSpan(m_cipher.GetSessionID()));
1580 : : } else {
1581 : 72 : info.transport_type = TransportProtocolType::DETECTING;
1582 : : }
1583 : :
1584 : 1970 : return info;
1585 : 2012 : }
1586 : :
1587 : 167012 : std::pair<size_t, bool> CConnman::SocketSendData(CNode& node) const
1588 : : {
1589 : 167012 : auto it = node.vSendMsg.begin();
1590 : 167012 : size_t nSentSize = 0;
1591 : 167012 : bool data_left{false}; //!< second return value (whether unsent data remains)
1592 : 167012 : std::optional<bool> expected_more;
1593 : :
1594 : 487181 : while (true) {
1595 [ + + ]: 487181 : if (it != node.vSendMsg.end()) {
1596 : : // If possible, move one message from the send queue to the transport. This fails when
1597 : : // there is an existing message still being sent, or (for v2 transports) when the
1598 : : // handshake has not yet completed.
1599 : 167267 : size_t memusage = it->GetMemoryUsage();
1600 [ + + ]: 167267 : if (node.m_transport->SetMessageToSend(*it)) {
1601 : : // Update memory usage of send buffer (as *it will be deleted).
1602 : 166758 : node.m_send_memusage -= memusage;
1603 : 166758 : ++it;
1604 : : }
1605 : : }
1606 [ + + ]: 487181 : const auto& [data, more, msg_type] = node.m_transport->GetBytesToSend(it != node.vSendMsg.end());
1607 : : // We rely on the 'more' value returned by GetBytesToSend to correctly predict whether more
1608 : : // bytes are still to be sent, to correctly set the MSG_MORE flag. As a sanity check,
1609 : : // verify that the previously returned 'more' was correct.
1610 [ + + ]: 487181 : if (expected_more.has_value()) Assume(!data.empty() == *expected_more);
1611 [ + + ]: 487181 : expected_more = more;
1612 [ + + ]: 487181 : data_left = !data.empty(); // will be overwritten on next loop if all of data gets sent
1613 : 487181 : int nBytes = 0;
1614 [ + + ]: 487181 : if (!data.empty()) {
1615 : 320624 : LOCK(node.m_sock_mutex);
1616 : : // There is no socket in case we've already disconnected, or in test cases without
1617 : : // real connections. In these cases, we bail out immediately and just leave things
1618 : : // in the send queue and transport.
1619 [ + + ]: 320624 : if (!node.m_sock) {
1620 : : break;
1621 : : }
1622 : 320617 : int flags = MSG_NOSIGNAL | MSG_DONTWAIT;
1623 : : #ifdef MSG_MORE
1624 [ + + ]: 320617 : if (more) {
1625 : 153612 : flags |= MSG_MORE;
1626 : : }
1627 : : #endif
1628 [ + - + - ]: 320617 : nBytes = node.m_sock->Send(reinterpret_cast<const char*>(data.data()), data.size(), flags);
1629 : 7 : }
1630 [ + - ]: 320617 : if (nBytes > 0) {
1631 : 320617 : node.m_last_send = GetTime<std::chrono::seconds>();
1632 : 320617 : node.nSendBytes += nBytes;
1633 : : // Notify transport that bytes have been processed.
1634 : 320617 : node.m_transport->MarkBytesSent(nBytes);
1635 : : // Update statistics per message type.
1636 [ + + ]: 320617 : if (!msg_type.empty()) { // don't report v2 handshake bytes for now
1637 : 320344 : node.AccountForSentBytes(msg_type, nBytes);
1638 : : }
1639 : 320617 : nSentSize += nBytes;
1640 [ + + ]: 320617 : if ((size_t)nBytes != data.size()) {
1641 : : // could not send full message; stop sending more
1642 : : break;
1643 : : }
1644 : : } else {
1645 [ - + ]: 166557 : if (nBytes < 0) {
1646 : : // error
1647 : 0 : int nErr = WSAGetLastError();
1648 [ # # # # ]: 0 : if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) {
1649 [ # # # # : 0 : LogDebug(BCLog::NET, "socket send error, %s: %s\n", node.DisconnectMsg(fLogIPs), NetworkErrorString(nErr));
# # ]
1650 : 0 : node.CloseSocketDisconnect();
1651 : : }
1652 : : }
1653 : : break;
1654 : : }
1655 : : }
1656 : :
1657 [ + + ]: 167012 : node.fPauseSend = node.m_send_memusage + node.m_transport->GetSendMemoryUsage() > nSendBufferMaxSize;
1658 : :
1659 [ + + ]: 167012 : if (it == node.vSendMsg.end()) {
1660 [ - + ]: 166990 : assert(node.m_send_memusage == 0);
1661 : : }
1662 : 167012 : node.vSendMsg.erase(node.vSendMsg.begin(), it);
1663 : 167012 : return {nSentSize, data_left};
1664 : : }
1665 : :
1666 : : /** Try to find a connection to evict when the node is full.
1667 : : * Extreme care must be taken to avoid opening the node to attacker
1668 : : * triggered network partitioning.
1669 : : * The strategy used here is to protect a small number of peers
1670 : : * for each of several distinct characteristics which are difficult
1671 : : * to forge. In order to partition a node the attacker must be
1672 : : * simultaneously better at all of them than honest peers.
1673 : : */
1674 : 1 : bool CConnman::AttemptToEvictConnection()
1675 : : {
1676 : 1 : std::vector<NodeEvictionCandidate> vEvictionCandidates;
1677 : 1 : {
1678 : :
1679 [ + - ]: 1 : LOCK(m_nodes_mutex);
1680 [ + + ]: 22 : for (const CNode* node : m_nodes) {
1681 [ - + ]: 21 : if (node->fDisconnect)
1682 : 0 : continue;
1683 : 21 : NodeEvictionCandidate candidate{
1684 : 21 : .id = node->GetId(),
1685 : : .m_connected = node->m_connected,
1686 : 21 : .m_min_ping_time = node->m_min_ping_time,
1687 : 21 : .m_last_block_time = node->m_last_block_time,
1688 : 21 : .m_last_tx_time = node->m_last_tx_time,
1689 [ + - ]: 21 : .fRelevantServices = node->m_has_all_wanted_services,
1690 : 21 : .m_relay_txs = node->m_relays_txs.load(),
1691 : 21 : .fBloomFilter = node->m_bloom_filter_loaded.load(),
1692 : 21 : .nKeyedNetGroup = node->nKeyedNetGroup,
1693 : 21 : .prefer_evict = node->m_prefer_evict,
1694 [ + - ]: 21 : .m_is_local = node->addr.IsLocal(),
1695 : 21 : .m_network = node->ConnectedThroughNetwork(),
1696 : 21 : .m_noban = node->HasPermission(NetPermissionFlags::NoBan),
1697 : 21 : .m_conn_type = node->m_conn_type,
1698 [ + - + - : 42 : };
+ - ]
1699 [ + - ]: 21 : vEvictionCandidates.push_back(candidate);
1700 : : }
1701 : 0 : }
1702 [ + - ]: 1 : const std::optional<NodeId> node_id_to_evict = SelectNodeToEvict(std::move(vEvictionCandidates));
1703 [ + - ]: 1 : if (!node_id_to_evict) {
1704 : : return false;
1705 : : }
1706 [ + - ]: 1 : LOCK(m_nodes_mutex);
1707 [ + - ]: 8 : for (CNode* pnode : m_nodes) {
1708 [ + + ]: 8 : if (pnode->GetId() == *node_id_to_evict) {
1709 [ + - + - : 2 : LogDebug(BCLog::NET, "selected %s connection for eviction peer=%d; disconnecting\n", pnode->ConnectionTypeAsString(), pnode->GetId());
+ - + - ]
1710 : 1 : pnode->fDisconnect = true;
1711 : 1 : return true;
1712 : : }
1713 : : }
1714 : : return false;
1715 : 2 : }
1716 : :
1717 : 953 : void CConnman::AcceptConnection(const ListenSocket& hListenSocket) {
1718 : 953 : struct sockaddr_storage sockaddr;
1719 : 953 : socklen_t len = sizeof(sockaddr);
1720 : 1906 : auto sock = hListenSocket.sock->Accept((struct sockaddr*)&sockaddr, &len);
1721 [ + - ]: 953 : CAddress addr;
1722 : :
1723 [ - + ]: 953 : if (!sock) {
1724 : 0 : const int nErr = WSAGetLastError();
1725 [ # # ]: 0 : if (nErr != WSAEWOULDBLOCK) {
1726 [ # # # # ]: 0 : LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
1727 : : }
1728 : 0 : return;
1729 : : }
1730 : :
1731 [ + - - + ]: 953 : if (!addr.SetSockAddr((const struct sockaddr*)&sockaddr)) {
1732 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Warning, "Unknown socket family\n");
# # ]
1733 : : } else {
1734 [ + - ]: 953 : addr = CAddress{MaybeFlipIPv6toCJDNS(addr), NODE_NONE};
1735 : : }
1736 : :
1737 [ + - + - ]: 953 : const CAddress addr_bind{MaybeFlipIPv6toCJDNS(GetBindAddress(*sock)), NODE_NONE};
1738 : :
1739 : 953 : NetPermissionFlags permission_flags = NetPermissionFlags::None;
1740 [ + - ]: 953 : hListenSocket.AddSocketPermissionFlags(permission_flags);
1741 : :
1742 [ + - ]: 953 : CreateNodeFromAcceptedSocket(std::move(sock), permission_flags, addr_bind, addr);
1743 : 953 : }
1744 : :
1745 : 953 : void CConnman::CreateNodeFromAcceptedSocket(std::unique_ptr<Sock>&& sock,
1746 : : NetPermissionFlags permission_flags,
1747 : : const CAddress& addr_bind,
1748 : : const CAddress& addr)
1749 : : {
1750 : 953 : int nInbound = 0;
1751 : :
1752 : 953 : AddWhitelistPermissionFlags(permission_flags, addr, vWhitelistedRangeIncoming);
1753 : :
1754 : 953 : {
1755 : 953 : LOCK(m_nodes_mutex);
1756 [ + + ]: 2608 : for (const CNode* pnode : m_nodes) {
1757 [ + + ]: 1655 : if (pnode->IsInboundConn()) nInbound++;
1758 : : }
1759 : 953 : }
1760 : :
1761 [ - + ]: 953 : if (!fNetworkActive) {
1762 [ # # # # ]: 0 : LogDebug(BCLog::NET, "connection from %s dropped: not accepting new connections\n", addr.ToStringAddrPort());
1763 : 0 : return;
1764 : : }
1765 : :
1766 [ - + ]: 953 : if (!sock->IsSelectable()) {
1767 [ # # ]: 0 : LogPrintf("connection from %s dropped: non-selectable socket\n", addr.ToStringAddrPort());
1768 : 0 : return;
1769 : : }
1770 : :
1771 : : // According to the internet TCP_NODELAY is not carried into accepted sockets
1772 : : // on all platforms. Set it again here just to be sure.
1773 : 953 : const int on{1};
1774 [ - + ]: 953 : if (sock->SetSockOpt(IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) == SOCKET_ERROR) {
1775 [ # # # # ]: 0 : LogDebug(BCLog::NET, "connection from %s: unable to set TCP_NODELAY, continuing anyway\n",
1776 : : addr.ToStringAddrPort());
1777 : : }
1778 : :
1779 : : // Don't accept connections from banned peers.
1780 [ + - + + ]: 953 : bool banned = m_banman && m_banman->IsBanned(addr);
1781 [ + + + + ]: 953 : if (!NetPermissions::HasFlag(permission_flags, NetPermissionFlags::NoBan) && banned)
1782 : : {
1783 [ + - + - ]: 6 : LogDebug(BCLog::NET, "connection from %s dropped (banned)\n", addr.ToStringAddrPort());
1784 : 3 : return;
1785 : : }
1786 : :
1787 : : // Only accept connections from discouraged peers if our inbound slots aren't (almost) full.
1788 [ + - + - ]: 950 : bool discouraged = m_banman && m_banman->IsDiscouraged(addr);
1789 [ + + + + : 950 : if (!NetPermissions::HasFlag(permission_flags, NetPermissionFlags::NoBan) && nInbound + 1 >= m_max_inbound && discouraged)
+ - ]
1790 : : {
1791 [ # # # # ]: 0 : LogDebug(BCLog::NET, "connection from %s dropped (discouraged)\n", addr.ToStringAddrPort());
1792 : 0 : return;
1793 : : }
1794 : :
1795 [ + + ]: 950 : if (nInbound >= m_max_inbound)
1796 : : {
1797 [ - + ]: 1 : if (!AttemptToEvictConnection()) {
1798 : : // No connection to evict, disconnect the new connection
1799 [ # # ]: 0 : LogDebug(BCLog::NET, "failed to find an eviction candidate - connection dropped (full)\n");
1800 : 0 : return;
1801 : : }
1802 : : }
1803 : :
1804 : 950 : NodeId id = GetNewNodeId();
1805 : 950 : uint64_t nonce = GetDeterministicRandomizer(RANDOMIZER_ID_LOCALHOSTNONCE).Write(id).Finalize();
1806 : :
1807 : 950 : const bool inbound_onion = std::find(m_onion_binds.begin(), m_onion_binds.end(), addr_bind) != m_onion_binds.end();
1808 : : // The V2Transport transparently falls back to V1 behavior when an incoming V1 connection is
1809 : : // detected, so use it whenever we signal NODE_P2P_V2.
1810 : 950 : ServiceFlags local_services = GetLocalServices();
1811 : 950 : const bool use_v2transport(local_services & NODE_P2P_V2);
1812 : :
1813 : 950 : CNode* pnode = new CNode(id,
1814 : : std::move(sock),
1815 : : addr,
1816 : : CalculateKeyedNetGroup(addr),
1817 : : nonce,
1818 : : addr_bind,
1819 : : /*addrNameIn=*/"",
1820 : : ConnectionType::INBOUND,
1821 : : inbound_onion,
1822 [ + - ]: 950 : CNodeOptions{
1823 : : .permission_flags = permission_flags,
1824 : : .prefer_evict = discouraged,
1825 : 950 : .recv_flood_size = nReceiveFloodSize,
1826 : : .use_v2transport = use_v2transport,
1827 [ + - + - : 1900 : });
+ - + - +
- ]
1828 : 950 : pnode->AddRef();
1829 : 950 : m_msgproc->InitializeNode(*pnode, local_services);
1830 : 950 : {
1831 : 950 : LOCK(m_nodes_mutex);
1832 [ + - ]: 950 : m_nodes.push_back(pnode);
1833 : 0 : }
1834 [ + - + - ]: 1900 : LogDebug(BCLog::NET, "connection from %s accepted\n", addr.ToStringAddrPort());
1835 : :
1836 : : // We received a new connection, harvest entropy from the time (and our peer count)
1837 : 950 : RandAddEvent((uint32_t)id);
1838 : : }
1839 : :
1840 : 141 : bool CConnman::AddConnection(const std::string& address, ConnectionType conn_type, bool use_v2transport = false)
1841 : : {
1842 : 141 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
1843 : 141 : std::optional<int> max_connections;
1844 [ + + + - ]: 141 : switch (conn_type) {
1845 : : case ConnectionType::INBOUND:
1846 : : case ConnectionType::MANUAL:
1847 : : return false;
1848 : 87 : case ConnectionType::OUTBOUND_FULL_RELAY:
1849 : 87 : max_connections = m_max_outbound_full_relay;
1850 : 87 : break;
1851 : 35 : case ConnectionType::BLOCK_RELAY:
1852 : 35 : max_connections = m_max_outbound_block_relay;
1853 : 35 : break;
1854 : : // no limit for ADDR_FETCH because -seednode has no limit either
1855 : : case ConnectionType::ADDR_FETCH:
1856 : : break;
1857 : : // no limit for FEELER connections since they're short-lived
1858 : : case ConnectionType::FEELER:
1859 : : break;
1860 : : } // no default case, so the compiler can warn about missing cases
1861 : :
1862 : : // Count existing connections
1863 [ + + + - ]: 550 : int existing_connections = WITH_LOCK(m_nodes_mutex,
1864 : : return std::count_if(m_nodes.begin(), m_nodes.end(), [conn_type](CNode* node) { return node->m_conn_type == conn_type; }););
1865 : :
1866 : : // Max connections of specified type already exist
1867 [ + + ]: 282 : if (max_connections != std::nullopt && existing_connections >= max_connections) return false;
1868 : :
1869 : : // Max total outbound connections already exist
1870 : 282 : CSemaphoreGrant grant(*semOutbound, true);
1871 [ + - ]: 141 : if (!grant) return false;
1872 : :
1873 [ + - + - ]: 141 : OpenNetworkConnection(CAddress(), false, std::move(grant), address.c_str(), conn_type, /*use_v2transport=*/use_v2transport);
1874 : 141 : return true;
1875 : : }
1876 : :
1877 : 527806 : void CConnman::DisconnectNodes()
1878 : : {
1879 : 527806 : AssertLockNotHeld(m_nodes_mutex);
1880 : 527806 : AssertLockNotHeld(m_reconnections_mutex);
1881 : :
1882 : : // Use a temporary variable to accumulate desired reconnections, so we don't need
1883 : : // m_reconnections_mutex while holding m_nodes_mutex.
1884 [ + - ]: 527806 : decltype(m_reconnections) reconnections_to_add;
1885 : :
1886 : 527806 : {
1887 [ + - ]: 527806 : LOCK(m_nodes_mutex);
1888 : :
1889 [ + + ]: 527806 : if (!fNetworkActive) {
1890 : : // Disconnect any connected nodes
1891 [ + + ]: 210 : for (CNode* pnode : m_nodes) {
1892 [ + - ]: 7 : if (!pnode->fDisconnect) {
1893 [ + - + - : 14 : LogDebug(BCLog::NET, "Network not active, %s\n", pnode->DisconnectMsg(fLogIPs));
+ - + - ]
1894 : 7 : pnode->fDisconnect = true;
1895 : : }
1896 : : }
1897 : : }
1898 : :
1899 : : // Disconnect unused nodes
1900 [ + - ]: 527806 : std::vector<CNode*> nodes_copy = m_nodes;
1901 [ + + ]: 1211570 : for (CNode* pnode : nodes_copy)
1902 : : {
1903 [ + + ]: 683764 : if (pnode->fDisconnect)
1904 : : {
1905 : : // remove from m_nodes
1906 : 813 : m_nodes.erase(remove(m_nodes.begin(), m_nodes.end(), pnode), m_nodes.end());
1907 : :
1908 : : // Add to reconnection list if appropriate. We don't reconnect right here, because
1909 : : // the creation of a connection is a blocking operation (up to several seconds),
1910 : : // and we don't want to hold up the socket handler thread for that long.
1911 [ + + ]: 813 : if (pnode->m_transport->ShouldReconnectV1()) {
1912 : 3 : reconnections_to_add.push_back({
1913 : 3 : .addr_connect = pnode->addr,
1914 [ + - ]: 3 : .grant = std::move(pnode->grantOutbound),
1915 : 3 : .destination = pnode->m_dest,
1916 : 3 : .conn_type = pnode->m_conn_type,
1917 : : .use_v2transport = false});
1918 [ + - + - : 3 : LogDebug(BCLog::NET, "retrying with v1 transport protocol for peer=%d\n", pnode->GetId());
+ - ]
1919 : : }
1920 : :
1921 : : // release outbound grant (if any)
1922 : 813 : pnode->grantOutbound.Release();
1923 : :
1924 : : // close socket and cleanup
1925 [ + - ]: 813 : pnode->CloseSocketDisconnect();
1926 : :
1927 : : // update connection count by network
1928 [ + + + - ]: 813 : if (pnode->IsManualOrFullOutboundConn()) --m_network_conn_counts[pnode->addr.GetNetwork()];
1929 : :
1930 : : // hold in disconnected pool until all refs are released
1931 [ + - ]: 813 : pnode->Release();
1932 [ + - ]: 813 : m_nodes_disconnected.push_back(pnode);
1933 : : }
1934 : : }
1935 [ + - ]: 527806 : }
1936 : 527806 : {
1937 : : // Delete disconnected nodes
1938 [ + - ]: 527806 : std::list<CNode*> nodes_disconnected_copy = m_nodes_disconnected;
1939 [ + + ]: 528624 : for (CNode* pnode : nodes_disconnected_copy)
1940 : : {
1941 : : // Destroy the object only after other threads have stopped using it.
1942 [ + + ]: 818 : if (pnode->GetRefCount() <= 0) {
1943 : 813 : m_nodes_disconnected.remove(pnode);
1944 [ + - ]: 813 : DeleteNode(pnode);
1945 : : }
1946 : : }
1947 : 0 : }
1948 : 527806 : {
1949 : : // Move entries from reconnections_to_add to m_reconnections.
1950 [ + - ]: 527806 : LOCK(m_reconnections_mutex);
1951 [ + - ]: 527806 : m_reconnections.splice(m_reconnections.end(), std::move(reconnections_to_add));
1952 : 527806 : }
1953 [ + - + - : 527809 : }
- - ]
1954 : :
1955 : 527806 : void CConnman::NotifyNumConnectionsChanged()
1956 : : {
1957 : 527806 : size_t nodes_size;
1958 : 527806 : {
1959 : 527806 : LOCK(m_nodes_mutex);
1960 [ + - ]: 527806 : nodes_size = m_nodes.size();
1961 : 527806 : }
1962 [ + + ]: 527806 : if(nodes_size != nPrevNodeCount) {
1963 : 2251 : nPrevNodeCount = nodes_size;
1964 [ + - ]: 2251 : if (m_client_interface) {
1965 : 2251 : m_client_interface->NotifyNumConnectionsChanged(nodes_size);
1966 : : }
1967 : : }
1968 : 527806 : }
1969 : :
1970 : 1081267 : bool CConnman::ShouldRunInactivityChecks(const CNode& node, std::chrono::seconds now) const
1971 : : {
1972 : 1081267 : return node.m_connected + m_peer_connect_timeout < now;
1973 : : }
1974 : :
1975 : 682230 : bool CConnman::InactivityCheck(const CNode& node) const
1976 : : {
1977 : : // Tests that see disconnects after using mocktime can start nodes with a
1978 : : // large timeout. For example, -peertimeout=999999999.
1979 : 682230 : const auto now{GetTime<std::chrono::seconds>()};
1980 : 682230 : const auto last_send{node.m_last_send.load()};
1981 : 682230 : const auto last_recv{node.m_last_recv.load()};
1982 : :
1983 [ + + ]: 682230 : if (!ShouldRunInactivityChecks(node, now)) return false;
1984 : :
1985 [ + + ]: 78 : bool has_received{last_recv.count() != 0};
1986 : 78 : bool has_sent{last_send.count() != 0};
1987 : :
1988 [ + + ]: 78 : if (!has_received || !has_sent) {
1989 [ + + ]: 3 : std::string has_never;
1990 [ + + + - ]: 3 : if (!has_received) has_never += ", never received from peer";
1991 [ + - + - ]: 3 : if (!has_sent) has_never += ", never sent to peer";
1992 [ + - + - : 6 : LogDebug(BCLog::NET,
+ - + - ]
1993 : : "socket no message in first %i seconds%s, %s\n",
1994 : : count_seconds(m_peer_connect_timeout),
1995 : : has_never,
1996 : : node.DisconnectMsg(fLogIPs)
1997 : : );
1998 : 3 : return true;
1999 : 3 : }
2000 : :
2001 [ - + ]: 75 : if (now > last_send + TIMEOUT_INTERVAL) {
2002 [ # # # # ]: 0 : LogDebug(BCLog::NET,
2003 : : "socket sending timeout: %is, %s\n", count_seconds(now - last_send),
2004 : : node.DisconnectMsg(fLogIPs)
2005 : : );
2006 : 0 : return true;
2007 : : }
2008 : :
2009 [ - + ]: 75 : if (now > last_recv + TIMEOUT_INTERVAL) {
2010 [ # # # # ]: 0 : LogDebug(BCLog::NET,
2011 : : "socket receive timeout: %is, %s\n", count_seconds(now - last_recv),
2012 : : node.DisconnectMsg(fLogIPs)
2013 : : );
2014 : 0 : return true;
2015 : : }
2016 : :
2017 [ + + ]: 75 : if (!node.fSuccessfullyConnected) {
2018 [ + + ]: 8 : if (node.m_transport->GetInfo().transport_type == TransportProtocolType::DETECTING) {
2019 [ + - + - ]: 4 : LogDebug(BCLog::NET, "V2 handshake timeout, %s\n", node.DisconnectMsg(fLogIPs));
2020 : : } else {
2021 [ + - + - ]: 12 : LogDebug(BCLog::NET, "version handshake timeout, %s\n", node.DisconnectMsg(fLogIPs));
2022 : : }
2023 : 8 : return true;
2024 : : }
2025 : :
2026 : : return false;
2027 : : }
2028 : :
2029 : 527806 : Sock::EventsPerSock CConnman::GenerateWaitSockets(Span<CNode* const> nodes)
2030 : : {
2031 : 527806 : Sock::EventsPerSock events_per_sock;
2032 : :
2033 [ + + ]: 1056080 : for (const ListenSocket& hListenSocket : vhListenSocket) {
2034 [ + - ]: 528274 : events_per_sock.emplace(hListenSocket.sock, Sock::Events{Sock::RECV});
2035 : : }
2036 : :
2037 [ + + ]: 1210757 : for (CNode* pnode : nodes) {
2038 [ + - ]: 682951 : bool select_recv = !pnode->fPauseRecv;
2039 : 682951 : bool select_send;
2040 : 682951 : {
2041 [ + - ]: 682951 : LOCK(pnode->cs_vSend);
2042 : : // Sending is possible if either there are bytes to send right now, or if there will be
2043 : : // once a potential message from vSendMsg is handed to the transport. GetBytesToSend
2044 : : // determines both of these in a single call.
2045 [ + + ]: 682951 : const auto& [to_send, more, _msg_type] = pnode->m_transport->GetBytesToSend(!pnode->vSendMsg.empty());
2046 [ + + + - : 1364286 : select_send = !to_send.empty() || more;
+ - ]
2047 : 682951 : }
2048 [ + + ]: 682951 : if (!select_recv && !select_send) continue;
2049 : :
2050 [ + - ]: 681349 : LOCK(pnode->m_sock_mutex);
2051 [ + - ]: 681349 : if (pnode->m_sock) {
2052 [ + + - + ]: 1361082 : Sock::Event event = (select_send ? Sock::SEND : 0) | (select_recv ? Sock::RECV : 0);
2053 [ + - ]: 681349 : events_per_sock.emplace(pnode->m_sock, Sock::Events{event});
2054 : : }
2055 : 681349 : }
2056 : :
2057 : 527806 : return events_per_sock;
2058 : 0 : }
2059 : :
2060 : 527806 : void CConnman::SocketHandler()
2061 : : {
2062 : 527806 : AssertLockNotHeld(m_total_bytes_sent_mutex);
2063 : :
2064 [ + - ]: 527806 : Sock::EventsPerSock events_per_sock;
2065 : :
2066 : 527806 : {
2067 [ + - ]: 527806 : const NodesSnapshot snap{*this, /*shuffle=*/false};
2068 : :
2069 : 527806 : const auto timeout = std::chrono::milliseconds(SELECT_TIMEOUT_MILLISECONDS);
2070 : :
2071 : : // Check for the readiness of the already connected sockets and the
2072 : : // listening sockets in one call ("readiness" as in poll(2) or
2073 : : // select(2)). If none are ready, wait for a short while and return
2074 : : // empty sets.
2075 [ + - ]: 1055612 : events_per_sock = GenerateWaitSockets(snap.Nodes());
2076 [ + + + - : 527806 : if (events_per_sock.empty() || !events_per_sock.begin()->first->WaitMany(timeout, events_per_sock)) {
- + ]
2077 [ + - ]: 38 : interruptNet.sleep_for(timeout);
2078 : : }
2079 : :
2080 : : // Service (send/receive) each of the already connected nodes.
2081 [ + - ]: 527806 : SocketHandlerConnected(snap.Nodes(), events_per_sock);
2082 : 527806 : }
2083 : :
2084 : : // Accept new connections from listening sockets.
2085 [ + - ]: 527806 : SocketHandlerListening(events_per_sock);
2086 : 527806 : }
2087 : :
2088 : 527806 : void CConnman::SocketHandlerConnected(const std::vector<CNode*>& nodes,
2089 : : const Sock::EventsPerSock& events_per_sock)
2090 : : {
2091 : 527806 : AssertLockNotHeld(m_total_bytes_sent_mutex);
2092 : :
2093 [ + + ]: 1210036 : for (CNode* pnode : nodes) {
2094 [ + + ]: 682631 : if (interruptNet)
2095 : : return;
2096 : :
2097 : : //
2098 : : // Receive
2099 : : //
2100 : 682230 : bool recvSet = false;
2101 : 682230 : bool sendSet = false;
2102 : 682230 : bool errorSet = false;
2103 : 682230 : {
2104 : 682230 : LOCK(pnode->m_sock_mutex);
2105 [ - + ]: 682230 : if (!pnode->m_sock) {
2106 [ # # ]: 0 : continue;
2107 : : }
2108 [ + - + - ]: 1364460 : const auto it = events_per_sock.find(pnode->m_sock);
2109 [ + + ]: 682230 : if (it != events_per_sock.end()) {
2110 : 680628 : recvSet = it->second.occurred & Sock::RECV;
2111 : 680628 : sendSet = it->second.occurred & Sock::SEND;
2112 : 680628 : errorSet = it->second.occurred & Sock::ERR;
2113 : : }
2114 : 0 : }
2115 : :
2116 [ + + ]: 682230 : if (sendSet) {
2117 : : // Send data
2118 [ + - + - ]: 2157 : auto [bytes_sent, data_left] = WITH_LOCK(pnode->cs_vSend, return SocketSendData(*pnode));
2119 [ + - ]: 719 : if (bytes_sent) {
2120 : 719 : RecordBytesSent(bytes_sent);
2121 : :
2122 : : // If both receiving and (non-optimistic) sending were possible, we first attempt
2123 : : // sending. If that succeeds, but does not fully drain the send queue, do not
2124 : : // attempt to receive. This avoids needlessly queueing data if the remote peer
2125 : : // is slow at receiving data, by means of TCP flow control. We only do this when
2126 : : // sending actually succeeded to make sure progress is always made; otherwise a
2127 : : // deadlock would be possible when both sides have data to send, but neither is
2128 : : // receiving.
2129 [ + + ]: 719 : if (data_left) recvSet = false;
2130 : : }
2131 : : }
2132 : :
2133 [ + + ]: 682230 : if (recvSet || errorSet)
2134 : : {
2135 : : // typical socket buffer is 8K-64K
2136 : 245603 : uint8_t pchBuf[0x10000];
2137 : 245603 : int nBytes = 0;
2138 : 245603 : {
2139 : 245603 : LOCK(pnode->m_sock_mutex);
2140 [ - + ]: 245603 : if (!pnode->m_sock) {
2141 [ # # ]: 0 : continue;
2142 : : }
2143 [ + - + - ]: 245603 : nBytes = pnode->m_sock->Recv(pchBuf, sizeof(pchBuf), MSG_DONTWAIT);
2144 : 0 : }
2145 [ + + ]: 245603 : if (nBytes > 0)
2146 : : {
2147 : 245149 : bool notify = false;
2148 [ + + ]: 245149 : if (!pnode->ReceiveMsgBytes({pchBuf, (size_t)nBytes}, notify)) {
2149 [ + - + - ]: 20 : LogDebug(BCLog::NET,
2150 : : "receiving message bytes failed, %s\n",
2151 : : pnode->DisconnectMsg(fLogIPs)
2152 : : );
2153 : 10 : pnode->CloseSocketDisconnect();
2154 : : }
2155 : 245149 : RecordBytesRecv(nBytes);
2156 [ + + ]: 245149 : if (notify) {
2157 : 150076 : pnode->MarkReceivedMsgsForProcessing();
2158 : 150076 : WakeMessageHandler();
2159 : : }
2160 : : }
2161 [ + + ]: 454 : else if (nBytes == 0)
2162 : : {
2163 : : // socket closed gracefully
2164 [ + - ]: 448 : if (!pnode->fDisconnect) {
2165 [ + - + - ]: 896 : LogDebug(BCLog::NET, "socket closed, %s\n", pnode->DisconnectMsg(fLogIPs));
2166 : : }
2167 : 448 : pnode->CloseSocketDisconnect();
2168 : : }
2169 [ + - ]: 6 : else if (nBytes < 0)
2170 : : {
2171 : : // error
2172 : 6 : int nErr = WSAGetLastError();
2173 [ + - + - ]: 6 : if (nErr != WSAEWOULDBLOCK && nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS)
2174 : : {
2175 [ + - ]: 6 : if (!pnode->fDisconnect) {
2176 [ + - + - : 12 : LogDebug(BCLog::NET, "socket recv error, %s: %s\n", pnode->DisconnectMsg(fLogIPs), NetworkErrorString(nErr));
+ - ]
2177 : : }
2178 : 6 : pnode->CloseSocketDisconnect();
2179 : : }
2180 : : }
2181 : : }
2182 : :
2183 [ + + ]: 682230 : if (InactivityCheck(*pnode)) pnode->fDisconnect = true;
2184 : : }
2185 : : }
2186 : :
2187 : 527806 : void CConnman::SocketHandlerListening(const Sock::EventsPerSock& events_per_sock)
2188 : : {
2189 [ + + ]: 1055168 : for (const ListenSocket& listen_socket : vhListenSocket) {
2190 [ + + ]: 528259 : if (interruptNet) {
2191 : : return;
2192 : : }
2193 [ + - + - ]: 1054724 : const auto it = events_per_sock.find(listen_socket.sock);
2194 [ + - + + ]: 527362 : if (it != events_per_sock.end() && it->second.occurred & Sock::RECV) {
2195 : 953 : AcceptConnection(listen_socket);
2196 : : }
2197 : : }
2198 : : }
2199 : :
2200 : 908 : void CConnman::ThreadSocketHandler()
2201 : : {
2202 : 908 : AssertLockNotHeld(m_total_bytes_sent_mutex);
2203 : :
2204 [ + + ]: 528714 : while (!interruptNet)
2205 : : {
2206 : 527806 : DisconnectNodes();
2207 : 527806 : NotifyNumConnectionsChanged();
2208 : 527806 : SocketHandler();
2209 : : }
2210 : 908 : }
2211 : :
2212 : 244261 : void CConnman::WakeMessageHandler()
2213 : : {
2214 : 244261 : {
2215 : 244261 : LOCK(mutexMsgProc);
2216 [ + - ]: 244261 : fMsgProcWake = true;
2217 : 244261 : }
2218 : 244261 : condMsgProc.notify_one();
2219 : 244261 : }
2220 : :
2221 : 11 : void CConnman::ThreadDNSAddressSeed()
2222 : : {
2223 : 11 : int outbound_connection_count = 0;
2224 : :
2225 [ + - - + ]: 11 : if (gArgs.IsArgSet("-seednode")) {
2226 : 0 : auto start = NodeClock::now();
2227 : 0 : constexpr std::chrono::seconds SEEDNODE_TIMEOUT = 30s;
2228 : 0 : LogPrintf("-seednode enabled. Trying the provided seeds for %d seconds before defaulting to the dnsseeds.\n", SEEDNODE_TIMEOUT.count());
2229 [ # # ]: 0 : while (!interruptNet) {
2230 [ # # ]: 0 : if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
2231 : : return;
2232 : :
2233 : : // Abort if we have spent enough time without reaching our target.
2234 : : // Giving seed nodes 30 seconds so this does not become a race against fixedseeds (which triggers after 1 min)
2235 [ # # ]: 0 : if (NodeClock::now() > start + SEEDNODE_TIMEOUT) {
2236 : 0 : LogPrintf("Couldn't connect to enough peers via seed nodes. Handing fetch logic to the DNS seeds.\n");
2237 : 0 : break;
2238 : : }
2239 : :
2240 : 0 : outbound_connection_count = GetFullOutboundConnCount();
2241 [ # # ]: 0 : if (outbound_connection_count >= SEED_OUTBOUND_CONNECTION_THRESHOLD) {
2242 : 0 : LogPrintf("P2P peers available. Finished fetching data from seed nodes.\n");
2243 : 0 : break;
2244 : : }
2245 : : }
2246 : : }
2247 : :
2248 : 11 : FastRandomContext rng;
2249 [ + - ]: 11 : std::vector<std::string> seeds = m_params.DNSSeeds();
2250 : 11 : std::shuffle(seeds.begin(), seeds.end(), rng);
2251 : 11 : int seeds_right_now = 0; // Number of seeds left before testing if we have enough connections
2252 : :
2253 [ + - + - : 11 : if (gArgs.GetBoolArg("-forcednsseed", DEFAULT_FORCEDNSSEED)) {
+ + ]
2254 : : // When -forcednsseed is provided, query all.
2255 : 1 : seeds_right_now = seeds.size();
2256 [ + - + + ]: 10 : } else if (addrman.Size() == 0) {
2257 : : // If we have no known peers, query all.
2258 : : // This will occur on the first run, or if peers.dat has been
2259 : : // deleted.
2260 : 5 : seeds_right_now = seeds.size();
2261 : : }
2262 : :
2263 : : // Proceed with dnsseeds if seednodes hasn't reached the target or if forcednsseed is set
2264 [ + - ]: 11 : if (outbound_connection_count < SEED_OUTBOUND_CONNECTION_THRESHOLD || seeds_right_now) {
2265 : : // goal: only query DNS seed if address need is acute
2266 : : // * If we have a reasonable number of peers in addrman, spend
2267 : : // some time trying them first. This improves user privacy by
2268 : : // creating fewer identifying DNS requests, reduces trust by
2269 : : // giving seeds less influence on the network topology, and
2270 : : // reduces traffic to the seeds.
2271 : : // * When querying DNS seeds query a few at once, this ensures
2272 : : // that we don't give DNS seeds the ability to eclipse nodes
2273 : : // that query them.
2274 : : // * If we continue having problems, eventually query all the
2275 : : // DNS seeds, and if that fails too, also try the fixed seeds.
2276 : : // (done in ThreadOpenConnections)
2277 : 11 : int found = 0;
2278 [ + - + + ]: 11 : const std::chrono::seconds seeds_wait_time = (addrman.Size() >= DNSSEEDS_DELAY_PEER_THRESHOLD ? DNSSEEDS_DELAY_MANY_PEERS : DNSSEEDS_DELAY_FEW_PEERS);
2279 : :
2280 [ + + ]: 18 : for (const std::string& seed : seeds) {
2281 [ + + ]: 11 : if (seeds_right_now == 0) {
2282 : 5 : seeds_right_now += DNSSEEDS_TO_QUERY_AT_ONCE;
2283 : :
2284 [ + - + - ]: 5 : if (addrman.Size() > 0) {
2285 [ + - ]: 5 : LogPrintf("Waiting %d seconds before querying DNS seeds.\n", seeds_wait_time.count());
2286 : 5 : std::chrono::seconds to_wait = seeds_wait_time;
2287 [ + + ]: 6 : while (to_wait.count() > 0) {
2288 : : // if sleeping for the MANY_PEERS interval, wake up
2289 : : // early to see if we have enough peers and can stop
2290 : : // this thread entirely freeing up its resources
2291 : 5 : std::chrono::seconds w = std::min(DNSSEEDS_DELAY_FEW_PEERS, to_wait);
2292 [ + - + + ]: 5 : if (!interruptNet.sleep_for(w)) return;
2293 [ + - ]: 2 : to_wait -= w;
2294 : :
2295 [ + - + + ]: 2 : if (GetFullOutboundConnCount() >= SEED_OUTBOUND_CONNECTION_THRESHOLD) {
2296 [ - + ]: 1 : if (found > 0) {
2297 [ # # ]: 0 : LogPrintf("%d addresses found from DNS seeds\n", found);
2298 [ # # ]: 0 : LogPrintf("P2P peers available. Finished DNS seeding.\n");
2299 : : } else {
2300 [ + - ]: 1 : LogPrintf("P2P peers available. Skipped DNS seeding.\n");
2301 : : }
2302 : 1 : return;
2303 : : }
2304 : : }
2305 : : }
2306 : : }
2307 : :
2308 [ + - + - ]: 7 : if (interruptNet) return;
2309 : :
2310 : : // hold off on querying seeds if P2P network deactivated
2311 [ - + ]: 7 : if (!fNetworkActive) {
2312 [ # # ]: 0 : LogPrintf("Waiting for network to be reactivated before querying DNS seeds.\n");
2313 : 0 : do {
2314 [ # # # # ]: 0 : if (!interruptNet.sleep_for(std::chrono::seconds{1})) return;
2315 [ # # ]: 0 : } while (!fNetworkActive);
2316 : : }
2317 : :
2318 [ + - ]: 7 : LogPrintf("Loading addresses from DNS seed %s\n", seed);
2319 : : // If -proxy is in use, we make an ADDR_FETCH connection to the DNS resolved peer address
2320 : : // for the base dns seed domain in chainparams
2321 [ + - + - ]: 7 : if (HaveNameProxy()) {
2322 [ + - ]: 7 : AddAddrFetch(seed);
2323 : : } else {
2324 : 0 : std::vector<CAddress> vAdd;
2325 : 0 : constexpr ServiceFlags requiredServiceBits{SeedsServiceFlags()};
2326 [ # # ]: 0 : std::string host = strprintf("x%x.%s", requiredServiceBits, seed);
2327 [ # # ]: 0 : CNetAddr resolveSource;
2328 [ # # # # ]: 0 : if (!resolveSource.SetInternal(host)) {
2329 : 0 : continue;
2330 : : }
2331 : : // Limit number of IPs learned from a single DNS seed. This limit exists to prevent the results from
2332 : : // one DNS seed from dominating AddrMan. Note that the number of results from a UDP DNS query is
2333 : : // bounded to 33 already, but it is possible for it to use TCP where a larger number of results can be
2334 : : // returned.
2335 : 0 : unsigned int nMaxIPs = 32;
2336 [ # # # # ]: 0 : const auto addresses{LookupHost(host, nMaxIPs, true)};
2337 [ # # ]: 0 : if (!addresses.empty()) {
2338 [ # # ]: 0 : for (const CNetAddr& ip : addresses) {
2339 [ # # ]: 0 : CAddress addr = CAddress(CService(ip, m_params.GetDefaultPort()), requiredServiceBits);
2340 : 0 : addr.nTime = rng.rand_uniform_delay(Now<NodeSeconds>() - 3 * 24h, -4 * 24h); // use a random age between 3 and 7 days old
2341 [ # # ]: 0 : vAdd.push_back(addr);
2342 : 0 : found++;
2343 : 0 : }
2344 [ # # ]: 0 : addrman.Add(vAdd, resolveSource);
2345 : : } else {
2346 : : // If the seed does not support a subdomain with our desired service bits,
2347 : : // we make an ADDR_FETCH connection to the DNS resolved peer address for the
2348 : : // base dns seed domain in chainparams
2349 [ # # ]: 0 : AddAddrFetch(seed);
2350 : : }
2351 : 0 : }
2352 : 7 : --seeds_right_now;
2353 : : }
2354 [ + - ]: 7 : LogPrintf("%d addresses found from DNS seeds\n", found);
2355 : : } else {
2356 [ # # ]: 0 : LogPrintf("Skipping DNS seeds. Enough peers have been found\n");
2357 : : }
2358 : 11 : }
2359 : :
2360 : 921 : void CConnman::DumpAddresses()
2361 : : {
2362 : 921 : const auto start{SteadyClock::now()};
2363 : :
2364 : 921 : DumpPeerAddresses(::gArgs, addrman);
2365 : :
2366 [ + - ]: 921 : LogDebug(BCLog::NET, "Flushed %d addresses to peers.dat %dms\n",
2367 : : addrman.Size(), Ticks<std::chrono::milliseconds>(SteadyClock::now() - start));
2368 : 921 : }
2369 : :
2370 : 34 : void CConnman::ProcessAddrFetch()
2371 : : {
2372 : 34 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
2373 [ + - ]: 34 : std::string strDest;
2374 : 34 : {
2375 [ + - ]: 34 : LOCK(m_addr_fetches_mutex);
2376 [ + + ]: 34 : if (m_addr_fetches.empty())
2377 [ + - ]: 31 : return;
2378 [ + - ]: 3 : strDest = m_addr_fetches.front();
2379 [ + - ]: 3 : m_addr_fetches.pop_front();
2380 : 31 : }
2381 : : // Attempt v2 connection if we support v2 - we'll reconnect with v1 if our
2382 : : // peer doesn't support it or immediately disconnects us for another reason.
2383 [ + - ]: 3 : const bool use_v2transport(GetLocalServices() & NODE_P2P_V2);
2384 [ + - ]: 3 : CAddress addr;
2385 : 3 : CSemaphoreGrant grant(*semOutbound, /*fTry=*/true);
2386 [ + - ]: 3 : if (grant) {
2387 [ + - ]: 3 : OpenNetworkConnection(addr, false, std::move(grant), strDest.c_str(), ConnectionType::ADDR_FETCH, use_v2transport);
2388 : : }
2389 : 34 : }
2390 : :
2391 : 86 : bool CConnman::GetTryNewOutboundPeer() const
2392 : : {
2393 : 86 : return m_try_another_outbound_peer;
2394 : : }
2395 : :
2396 : 1138 : void CConnman::SetTryNewOutboundPeer(bool flag)
2397 : : {
2398 : 1138 : m_try_another_outbound_peer = flag;
2399 [ + - + + ]: 2275 : LogDebug(BCLog::NET, "setting try another outbound peer=%s\n", flag ? "true" : "false");
2400 : 1138 : }
2401 : :
2402 : 59 : void CConnman::StartExtraBlockRelayPeers()
2403 : : {
2404 [ + - ]: 59 : LogDebug(BCLog::NET, "enabling extra block-relay-only peers\n");
2405 : 59 : m_start_extra_block_relay_peers = true;
2406 : 59 : }
2407 : :
2408 : : // Return the number of outbound connections that are full relay (not blocks only)
2409 : 2 : int CConnman::GetFullOutboundConnCount() const
2410 : : {
2411 : 2 : int nRelevant = 0;
2412 : 2 : {
2413 : 2 : LOCK(m_nodes_mutex);
2414 [ + + ]: 6 : for (const CNode* pnode : m_nodes) {
2415 [ + - + + ]: 4 : if (pnode->fSuccessfullyConnected && pnode->IsFullOutboundConn()) ++nRelevant;
2416 : : }
2417 : 2 : }
2418 : 2 : return nRelevant;
2419 : : }
2420 : :
2421 : : // Return the number of peers we have over our outbound connection limit
2422 : : // Exclude peers that are marked for disconnect, or are going to be
2423 : : // disconnected soon (eg ADDR_FETCH and FEELER)
2424 : : // Also exclude peers that haven't finished initial connection handshake yet
2425 : : // (so that we don't decide we're over our desired connection limit, and then
2426 : : // evict some peer that has finished the handshake)
2427 : 350 : int CConnman::GetExtraFullOutboundCount() const
2428 : : {
2429 : 350 : int full_outbound_peers = 0;
2430 : 350 : {
2431 : 350 : LOCK(m_nodes_mutex);
2432 [ + + ]: 728 : for (const CNode* pnode : m_nodes) {
2433 [ + - + + : 378 : if (pnode->fSuccessfullyConnected && !pnode->fDisconnect && pnode->IsFullOutboundConn()) {
+ + ]
2434 : 56 : ++full_outbound_peers;
2435 : : }
2436 : : }
2437 : 350 : }
2438 [ + + ]: 350 : return std::max(full_outbound_peers - m_max_outbound_full_relay, 0);
2439 : : }
2440 : :
2441 : 350 : int CConnman::GetExtraBlockRelayCount() const
2442 : : {
2443 : 350 : int block_relay_peers = 0;
2444 : 350 : {
2445 : 350 : LOCK(m_nodes_mutex);
2446 [ + + ]: 728 : for (const CNode* pnode : m_nodes) {
2447 [ + - + + : 378 : if (pnode->fSuccessfullyConnected && !pnode->fDisconnect && pnode->IsBlockOnlyConn()) {
+ + ]
2448 : 11 : ++block_relay_peers;
2449 : : }
2450 : : }
2451 : 350 : }
2452 [ + + ]: 350 : return std::max(block_relay_peers - m_max_outbound_block_relay, 0);
2453 : : }
2454 : :
2455 : 7 : std::unordered_set<Network> CConnman::GetReachableEmptyNetworks() const
2456 : : {
2457 : 7 : std::unordered_set<Network> networks{};
2458 [ + + ]: 56 : for (int n = 0; n < NET_MAX; n++) {
2459 : 49 : enum Network net = (enum Network)n;
2460 [ + + ]: 49 : if (net == NET_UNROUTABLE || net == NET_INTERNAL) continue;
2461 [ + - + + : 35 : if (g_reachable_nets.Contains(net) && addrman.Size(net, std::nullopt) == 0) {
+ - + + ]
2462 [ + - ]: 17 : networks.insert(net);
2463 : : }
2464 : : }
2465 : 7 : return networks;
2466 : 0 : }
2467 : :
2468 : 38 : bool CConnman::MultipleManualOrFullOutboundConns(Network net) const
2469 : : {
2470 : 38 : AssertLockHeld(m_nodes_mutex);
2471 : 38 : return m_network_conn_counts[net] > 1;
2472 : : }
2473 : :
2474 : 0 : bool CConnman::MaybePickPreferredNetwork(std::optional<Network>& network)
2475 : : {
2476 : 0 : std::array<Network, 5> nets{NET_IPV4, NET_IPV6, NET_ONION, NET_I2P, NET_CJDNS};
2477 : 0 : std::shuffle(nets.begin(), nets.end(), FastRandomContext());
2478 : :
2479 : 0 : LOCK(m_nodes_mutex);
2480 [ # # ]: 0 : for (const auto net : nets) {
2481 [ # # # # : 0 : if (g_reachable_nets.Contains(net) && m_network_conn_counts[net] == 0 && addrman.Size(net) != 0) {
# # # # #
# ]
2482 : 0 : network = net;
2483 : 0 : return true;
2484 : : }
2485 : : }
2486 : :
2487 : : return false;
2488 : 0 : }
2489 : :
2490 : 32 : void CConnman::ThreadOpenConnections(const std::vector<std::string> connect, Span<const std::string> seed_nodes)
2491 : : {
2492 : 32 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
2493 : 32 : AssertLockNotHeld(m_reconnections_mutex);
2494 : 32 : FastRandomContext rng;
2495 : : // Connect to specific addresses
2496 [ + + ]: 32 : if (!connect.empty())
2497 : : {
2498 : : // Attempt v2 connection if we support v2 - we'll reconnect with v1 if our
2499 : : // peer doesn't support it or immediately disconnects us for another reason.
2500 [ + - ]: 5 : const bool use_v2transport(GetLocalServices() & NODE_P2P_V2);
2501 : 5 : for (int64_t nLoop = 0;; nLoop++)
2502 : : {
2503 [ + + ]: 12 : for (const std::string& strAddr : connect)
2504 : : {
2505 [ + - ]: 7 : CAddress addr(CService(), NODE_NONE);
2506 [ + - ]: 7 : OpenNetworkConnection(addr, false, {}, strAddr.c_str(), ConnectionType::MANUAL, /*use_v2transport=*/use_v2transport);
2507 [ + - - + ]: 7 : for (int i = 0; i < 10 && i < nLoop; i++)
2508 : : {
2509 [ # # # # ]: 0 : if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
2510 : 0 : return;
2511 : : }
2512 : 7 : }
2513 [ + - - + ]: 5 : if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
2514 : : return;
2515 [ # # ]: 0 : PerformReconnections();
2516 : 0 : }
2517 : : }
2518 : :
2519 : : // Initiate network connections
2520 : 27 : auto start = GetTime<std::chrono::microseconds>();
2521 : :
2522 : : // Minimum time before next feeler connection (in microseconds).
2523 : 27 : auto next_feeler = start + rng.rand_exp_duration(FEELER_INTERVAL);
2524 : 27 : auto next_extra_block_relay = start + rng.rand_exp_duration(EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL);
2525 [ + - ]: 27 : auto next_extra_network_peer{start + rng.rand_exp_duration(EXTRA_NETWORK_PEER_INTERVAL)};
2526 [ + - + - ]: 27 : const bool dnsseed = gArgs.GetBoolArg("-dnsseed", DEFAULT_DNSSEED);
2527 [ + - + - ]: 27 : bool add_fixed_seeds = gArgs.GetBoolArg("-fixedseeds", DEFAULT_FIXEDSEEDS);
2528 [ + - + - ]: 27 : const bool use_seednodes{gArgs.IsArgSet("-seednode")};
2529 : :
2530 : 27 : auto seed_node_timer = NodeClock::now();
2531 [ + - + + : 27 : bool add_addr_fetch{addrman.Size() == 0 && !seed_nodes.empty()};
+ + ]
2532 : 27 : constexpr std::chrono::seconds ADD_NEXT_SEEDNODE = 10s;
2533 : :
2534 [ + + ]: 27 : if (!add_fixed_seeds) {
2535 [ + - ]: 24 : LogPrintf("Fixed seeds are disabled\n");
2536 : : }
2537 : :
2538 [ + - + - ]: 34 : while (!interruptNet)
2539 : : {
2540 [ + + ]: 34 : if (add_addr_fetch) {
2541 : 2 : add_addr_fetch = false;
2542 : 2 : const auto& seed{SpanPopBack(seed_nodes)};
2543 [ + - ]: 2 : AddAddrFetch(seed);
2544 : :
2545 [ + - + + ]: 2 : if (addrman.Size() == 0) {
2546 [ + - ]: 1 : LogInfo("Empty addrman, adding seednode (%s) to addrfetch\n", seed);
2547 : : } else {
2548 [ + - ]: 1 : LogInfo("Couldn't connect to peers from addrman after %d seconds. Adding seednode (%s) to addrfetch\n", ADD_NEXT_SEEDNODE.count(), seed);
2549 : : }
2550 : : }
2551 : :
2552 [ + - ]: 34 : ProcessAddrFetch();
2553 : :
2554 [ + - + + ]: 34 : if (!interruptNet.sleep_for(std::chrono::milliseconds(500)))
2555 : : return;
2556 : :
2557 [ + - ]: 7 : PerformReconnections();
2558 : :
2559 : 7 : CSemaphoreGrant grant(*semOutbound);
2560 [ + - + - ]: 7 : if (interruptNet)
2561 : : return;
2562 : :
2563 [ + - ]: 7 : const std::unordered_set<Network> fixed_seed_networks{GetReachableEmptyNetworks()};
2564 [ + + + - ]: 7 : if (add_fixed_seeds && !fixed_seed_networks.empty()) {
2565 : : // When the node starts with an empty peers.dat, there are a few other sources of peers before
2566 : : // we fallback on to fixed seeds: -dnsseed, -seednode, -addnode
2567 : : // If none of those are available, we fallback on to fixed seeds immediately, else we allow
2568 : : // 60 seconds for any of those sources to populate addrman.
2569 : 3 : bool add_fixed_seeds_now = false;
2570 : : // It is cheapest to check if enough time has passed first.
2571 [ + + ]: 3 : if (GetTime<std::chrono::seconds>() > start + std::chrono::minutes{1}) {
2572 : 2 : add_fixed_seeds_now = true;
2573 [ + - ]: 2 : LogPrintf("Adding fixed seeds as 60 seconds have passed and addrman is empty for at least one reachable network\n");
2574 : : }
2575 : :
2576 : : // Perform cheap checks before locking a mutex.
2577 [ + - ]: 1 : else if (!dnsseed && !use_seednodes) {
2578 [ + - ]: 1 : LOCK(m_added_nodes_mutex);
2579 [ + - ]: 1 : if (m_added_node_params.empty()) {
2580 : 1 : add_fixed_seeds_now = true;
2581 [ + - ]: 1 : LogPrintf("Adding fixed seeds as -dnsseed=0 (or IPv4/IPv6 connections are disabled via -onlynet) and neither -addnode nor -seednode are provided\n");
2582 : : }
2583 : 0 : }
2584 : :
2585 [ + - ]: 1 : if (add_fixed_seeds_now) {
2586 [ + - ]: 3 : std::vector<CAddress> seed_addrs{ConvertSeeds(m_params.FixedSeeds())};
2587 : : // We will not make outgoing connections to peers that are unreachable
2588 : : // (e.g. because of -onlynet configuration).
2589 : : // Therefore, we do not add them to addrman in the first place.
2590 : : // In case previously unreachable networks become reachable
2591 : : // (e.g. in case of -onlynet changes by the user), fixed seeds will
2592 : : // be loaded only for networks for which we have no addresses.
2593 [ + - ]: 3 : seed_addrs.erase(std::remove_if(seed_addrs.begin(), seed_addrs.end(),
2594 : 0 : [&fixed_seed_networks](const CAddress& addr) { return fixed_seed_networks.count(addr.GetNetwork()) == 0; }),
2595 [ + - ]: 3 : seed_addrs.end());
2596 [ + - ]: 3 : CNetAddr local;
2597 [ + - + - ]: 3 : local.SetInternal("fixedseeds");
2598 [ + - ]: 3 : addrman.Add(seed_addrs, local);
2599 : 3 : add_fixed_seeds = false;
2600 [ + - ]: 3 : LogPrintf("Added %d fixed seeds from reachable networks.\n", seed_addrs.size());
2601 : 3 : }
2602 : : }
2603 : :
2604 : : //
2605 : : // Choose an address to connect to based on most recently seen
2606 : : //
2607 [ + - ]: 7 : CAddress addrConnect;
2608 : :
2609 : : // Only connect out to one peer per ipv4/ipv6 network group (/16 for IPv4).
2610 : 7 : int nOutboundFullRelay = 0;
2611 : 7 : int nOutboundBlockRelay = 0;
2612 : 7 : int outbound_privacy_network_peers = 0;
2613 [ + - ]: 7 : std::set<std::vector<unsigned char>> outbound_ipv46_peer_netgroups;
2614 : :
2615 : 7 : {
2616 [ + - ]: 7 : LOCK(m_nodes_mutex);
2617 [ + + ]: 11 : for (const CNode* pnode : m_nodes) {
2618 [ - + ]: 4 : if (pnode->IsFullOutboundConn()) nOutboundFullRelay++;
2619 [ + + ]: 4 : if (pnode->IsBlockOnlyConn()) nOutboundBlockRelay++;
2620 : :
2621 : : // Make sure our persistent outbound slots to ipv4/ipv6 peers belong to different netgroups.
2622 [ + + ]: 4 : switch (pnode->m_conn_type) {
2623 : : // We currently don't take inbound connections into account. Since they are
2624 : : // free to make, an attacker could make them to prevent us from connecting to
2625 : : // certain peers.
2626 : : case ConnectionType::INBOUND:
2627 : : // Short-lived outbound connections should not affect how we select outbound
2628 : : // peers from addrman.
2629 : : case ConnectionType::ADDR_FETCH:
2630 : : case ConnectionType::FEELER:
2631 : : break;
2632 : 2 : case ConnectionType::MANUAL:
2633 : 2 : case ConnectionType::OUTBOUND_FULL_RELAY:
2634 : 2 : case ConnectionType::BLOCK_RELAY:
2635 : 4 : const CAddress address{pnode->addr};
2636 [ + - + - : 2 : if (address.IsTor() || address.IsI2P() || address.IsCJDNS()) {
+ - ]
2637 : : // Since our addrman-groups for these networks are
2638 : : // random, without relation to the route we
2639 : : // take to connect to these peers or to the
2640 : : // difficulty in obtaining addresses with diverse
2641 : : // groups, we don't worry about diversity with
2642 : : // respect to our addrman groups when connecting to
2643 : : // these networks.
2644 : 0 : ++outbound_privacy_network_peers;
2645 : : } else {
2646 [ + - + - ]: 4 : outbound_ipv46_peer_netgroups.insert(m_netgroupman.GetGroup(address));
2647 : : }
2648 : : } // no default case, so the compiler can warn about missing cases
2649 : : }
2650 : 0 : }
2651 : :
2652 [ + + + - ]: 7 : if (!seed_nodes.empty() && nOutboundFullRelay < SEED_OUTBOUND_CONNECTION_THRESHOLD) {
2653 [ + + ]: 2 : if (NodeClock::now() > seed_node_timer + ADD_NEXT_SEEDNODE) {
2654 : 1 : seed_node_timer = NodeClock::now();
2655 : 1 : add_addr_fetch = true;
2656 : : }
2657 : : }
2658 : :
2659 : 7 : ConnectionType conn_type = ConnectionType::OUTBOUND_FULL_RELAY;
2660 : 7 : auto now = GetTime<std::chrono::microseconds>();
2661 : 7 : bool anchor = false;
2662 : 7 : bool fFeeler = false;
2663 : 7 : std::optional<Network> preferred_net;
2664 : :
2665 : : // Determine what type of connection to open. Opening
2666 : : // BLOCK_RELAY connections to addresses from anchors.dat gets the highest
2667 : : // priority. Then we open OUTBOUND_FULL_RELAY priority until we
2668 : : // meet our full-relay capacity. Then we open BLOCK_RELAY connection
2669 : : // until we hit our block-relay-only peer limit.
2670 : : // GetTryNewOutboundPeer() gets set when a stale tip is detected, so we
2671 : : // try opening an additional OUTBOUND_FULL_RELAY connection. If none of
2672 : : // these conditions are met, check to see if it's time to try an extra
2673 : : // block-relay-only peer (to confirm our tip is current, see below) or the next_feeler
2674 : : // timer to decide if we should open a FEELER.
2675 : :
2676 [ + + - + ]: 7 : if (!m_anchors.empty() && (nOutboundBlockRelay < m_max_outbound_block_relay)) {
2677 : : conn_type = ConnectionType::BLOCK_RELAY;
2678 : : anchor = true;
2679 [ - + ]: 6 : } else if (nOutboundFullRelay < m_max_outbound_full_relay) {
2680 : : // OUTBOUND_FULL_RELAY
2681 [ # # ]: 0 : } else if (nOutboundBlockRelay < m_max_outbound_block_relay) {
2682 : : conn_type = ConnectionType::BLOCK_RELAY;
2683 [ # # # # ]: 0 : } else if (GetTryNewOutboundPeer()) {
2684 : : // OUTBOUND_FULL_RELAY
2685 [ # # # # ]: 0 : } else if (now > next_extra_block_relay && m_start_extra_block_relay_peers) {
2686 : : // Periodically connect to a peer (using regular outbound selection
2687 : : // methodology from addrman) and stay connected long enough to sync
2688 : : // headers, but not much else.
2689 : : //
2690 : : // Then disconnect the peer, if we haven't learned anything new.
2691 : : //
2692 : : // The idea is to make eclipse attacks very difficult to pull off,
2693 : : // because every few minutes we're finding a new peer to learn headers
2694 : : // from.
2695 : : //
2696 : : // This is similar to the logic for trying extra outbound (full-relay)
2697 : : // peers, except:
2698 : : // - we do this all the time on an exponential timer, rather than just when
2699 : : // our tip is stale
2700 : : // - we potentially disconnect our next-youngest block-relay-only peer, if our
2701 : : // newest block-relay-only peer delivers a block more recently.
2702 : : // See the eviction logic in net_processing.cpp.
2703 : : //
2704 : : // Because we can promote these connections to block-relay-only
2705 : : // connections, they do not get their own ConnectionType enum
2706 : : // (similar to how we deal with extra outbound peers).
2707 : 0 : next_extra_block_relay = now + rng.rand_exp_duration(EXTRA_BLOCK_RELAY_ONLY_PEER_INTERVAL);
2708 : 0 : conn_type = ConnectionType::BLOCK_RELAY;
2709 [ # # ]: 0 : } else if (now > next_feeler) {
2710 : 0 : next_feeler = now + rng.rand_exp_duration(FEELER_INTERVAL);
2711 : 0 : conn_type = ConnectionType::FEELER;
2712 : 0 : fFeeler = true;
2713 [ # # ]: 0 : } else if (nOutboundFullRelay == m_max_outbound_full_relay &&
2714 [ # # ]: 0 : m_max_outbound_full_relay == MAX_OUTBOUND_FULL_RELAY_CONNECTIONS &&
2715 [ # # # # : 0 : now > next_extra_network_peer &&
# # ]
2716 [ # # ]: 0 : MaybePickPreferredNetwork(preferred_net)) {
2717 : : // Full outbound connection management: Attempt to get at least one
2718 : : // outbound peer from each reachable network by making extra connections
2719 : : // and then protecting "only" peers from a network during outbound eviction.
2720 : : // This is not attempted if the user changed -maxconnections to a value
2721 : : // so low that less than MAX_OUTBOUND_FULL_RELAY_CONNECTIONS are made,
2722 : : // to prevent interactions with otherwise protected outbound peers.
2723 : 0 : next_extra_network_peer = now + rng.rand_exp_duration(EXTRA_NETWORK_PEER_INTERVAL);
2724 : : } else {
2725 : : // skip to next iteration of while loop
2726 : 0 : continue;
2727 : : }
2728 : :
2729 [ + - ]: 7 : addrman.ResolveCollisions();
2730 : :
2731 : 7 : const auto current_time{NodeClock::now()};
2732 : 7 : int nTries = 0;
2733 [ + - ]: 7 : const auto reachable_nets{g_reachable_nets.All()};
2734 : :
2735 [ + - + - ]: 107 : while (!interruptNet)
2736 : : {
2737 [ + + - + ]: 107 : if (anchor && !m_anchors.empty()) {
2738 : 1 : const CAddress addr = m_anchors.back();
2739 : 1 : m_anchors.pop_back();
2740 [ + - + - : 4 : if (!addr.IsValid() || IsLocal(addr) || !g_reachable_nets.Contains(addr) ||
+ - + - +
- + - -
+ ]
2741 [ + - + - : 3 : !m_msgproc->HasAllDesirableServiceFlags(addr.nServices) ||
+ - ]
2742 [ + - ]: 2 : outbound_ipv46_peer_netgroups.count(m_netgroupman.GetGroup(addr))) continue;
2743 : 1 : addrConnect = addr;
2744 [ + - + - : 2 : LogDebug(BCLog::NET, "Trying to make an anchor connection to %s\n", addrConnect.ToStringAddrPort());
+ - + - ]
2745 : 1 : break;
2746 : 1 : }
2747 : :
2748 : : // If we didn't find an appropriate destination after trying 100 addresses fetched from addrman,
2749 : : // stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates
2750 : : // already-connected network ranges, ...) before trying new addrman addresses.
2751 : 106 : nTries++;
2752 [ + + ]: 106 : if (nTries > 100)
2753 : : break;
2754 : :
2755 [ + - ]: 105 : CAddress addr;
2756 : 105 : NodeSeconds addr_last_try{0s};
2757 : :
2758 [ - + ]: 105 : if (fFeeler) {
2759 : : // First, try to get a tried table collision address. This returns
2760 : : // an empty (invalid) address if there are no collisions to try.
2761 [ # # ]: 0 : std::tie(addr, addr_last_try) = addrman.SelectTriedCollision();
2762 : :
2763 [ # # # # ]: 0 : if (!addr.IsValid()) {
2764 : : // No tried table collisions. Select a new table address
2765 : : // for our feeler.
2766 [ # # ]: 0 : std::tie(addr, addr_last_try) = addrman.Select(true, reachable_nets);
2767 [ # # # # ]: 0 : } else if (AlreadyConnectedToAddress(addr)) {
2768 : : // If test-before-evict logic would have us connect to a
2769 : : // peer that we're already connected to, just mark that
2770 : : // address as Good(). We won't be able to initiate the
2771 : : // connection anyway, so this avoids inadvertently evicting
2772 : : // a currently-connected peer.
2773 [ # # ]: 0 : addrman.Good(addr);
2774 : : // Select a new table address for our feeler instead.
2775 [ # # ]: 0 : std::tie(addr, addr_last_try) = addrman.Select(true, reachable_nets);
2776 : : }
2777 : : } else {
2778 : : // Not a feeler
2779 : : // If preferred_net has a value set, pick an extra outbound
2780 : : // peer from that network. The eviction logic in net_processing
2781 : : // ensures that a peer from another network will be evicted.
2782 [ - + ]: 210 : std::tie(addr, addr_last_try) = preferred_net.has_value()
2783 [ - + - - : 210 : ? addrman.Select(false, {*preferred_net})
- - - + -
- ]
2784 [ + - ]: 210 : : addrman.Select(false, reachable_nets);
2785 : : }
2786 : :
2787 : : // Require outbound IPv4/IPv6 connections, other than feelers, to be to distinct network groups
2788 [ + - + - : 210 : if (!fFeeler && outbound_ipv46_peer_netgroups.count(m_netgroupman.GetGroup(addr))) {
+ + + + ]
2789 : 100 : continue;
2790 : : }
2791 : :
2792 : : // if we selected an invalid or local address, restart
2793 [ + - + + : 5 : if (!addr.IsValid() || IsLocal(addr)) {
+ - + - ]
2794 : : break;
2795 : : }
2796 : :
2797 [ + - - + ]: 2 : if (!g_reachable_nets.Contains(addr)) {
2798 : 0 : continue;
2799 : : }
2800 : :
2801 : : // only consider very recently tried nodes after 30 failed attempts
2802 [ - + - - ]: 2 : if (current_time - addr_last_try < 10min && nTries < 30) {
2803 : 0 : continue;
2804 : : }
2805 : :
2806 : : // for non-feelers, require all the services we'll want,
2807 : : // for feelers, only require they be a full node (only because most
2808 : : // SPV clients don't have a good address DB available)
2809 [ + - + - : 2 : if (!fFeeler && !m_msgproc->HasAllDesirableServiceFlags(addr.nServices)) {
+ - ]
2810 : 0 : continue;
2811 [ - + - - ]: 2 : } else if (fFeeler && !MayHaveUsefulAddressDB(addr.nServices)) {
2812 : 0 : continue;
2813 : : }
2814 : :
2815 : : // Do not connect to bad ports, unless 50 invalid addresses have been selected already.
2816 [ + - - + : 2 : if (nTries < 50 && (addr.IsIPv4() || addr.IsIPv6()) && IsBadPort(addr.GetPort())) {
- - + - +
- + - ]
2817 : 0 : continue;
2818 : : }
2819 : :
2820 : : // Do not make automatic outbound connections to addnode peers, to
2821 : : // not use our limited outbound slots for them and to ensure
2822 : : // addnode connections benefit from their intended protections.
2823 [ + - - + ]: 2 : if (AddedNodesContain(addr)) {
2824 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Debug, "Not making automatic %s%s connection to %s peer selected for manual (addnode) connection%s\n",
# # # # #
# # # # #
# # # # #
# # # # #
# # ]
2825 : : preferred_net.has_value() ? "network-specific " : "",
2826 : : ConnectionTypeAsString(conn_type), GetNetworkName(addr.GetNetwork()),
2827 : : fLogIPs ? strprintf(": %s", addr.ToStringAddrPort()) : "");
2828 : 0 : continue;
2829 : : }
2830 : :
2831 : 2 : addrConnect = addr;
2832 : : break;
2833 : 105 : }
2834 : :
2835 [ + - + + ]: 7 : if (addrConnect.IsValid()) {
2836 [ - + ]: 3 : if (fFeeler) {
2837 : : // Add small amount of random noise before connection to avoid synchronization.
2838 [ # # # # ]: 0 : if (!interruptNet.sleep_for(rng.rand_uniform_duration<CThreadInterrupt::Clock>(FEELER_SLEEP_WINDOW))) {
2839 : 0 : return;
2840 : : }
2841 [ # # # # : 0 : LogDebug(BCLog::NET, "Making feeler connection to %s\n", addrConnect.ToStringAddrPort());
# # # # ]
2842 : : }
2843 : :
2844 [ - + - - : 3 : if (preferred_net != std::nullopt) LogDebug(BCLog::NET, "Making network specific connection to %s on %s.\n", addrConnect.ToStringAddrPort(), GetNetworkName(preferred_net.value()));
- - - - -
- - - -
- ]
2845 : :
2846 : : // Record addrman failure attempts when node has at least 2 persistent outbound connections to peers with
2847 : : // different netgroups in ipv4/ipv6 networks + all peers in Tor/I2P/CJDNS networks.
2848 : : // Don't record addrman failure attempts when node is offline. This can be identified since all local
2849 : : // network connections (if any) belong in the same netgroup, and the size of `outbound_ipv46_peer_netgroups` would only be 1.
2850 [ - + ]: 3 : const bool count_failures{((int)outbound_ipv46_peer_netgroups.size() + outbound_privacy_network_peers) >= std::min(m_max_automatic_connections - 1, 2)};
2851 : : // Use BIP324 transport when both us and them have NODE_V2_P2P set.
2852 [ + - ]: 3 : const bool use_v2transport(addrConnect.nServices & GetLocalServices() & NODE_P2P_V2);
2853 [ + - ]: 3 : OpenNetworkConnection(addrConnect, count_failures, std::move(grant), /*strDest=*/nullptr, conn_type, use_v2transport);
2854 : : }
2855 : 7 : }
2856 : 32 : }
2857 : :
2858 : 27 : std::vector<CAddress> CConnman::GetCurrentBlockRelayOnlyConns() const
2859 : : {
2860 : 27 : std::vector<CAddress> ret;
2861 [ + - ]: 27 : LOCK(m_nodes_mutex);
2862 [ + + ]: 35 : for (const CNode* pnode : m_nodes) {
2863 [ + + ]: 8 : if (pnode->IsBlockOnlyConn()) {
2864 [ + - ]: 3 : ret.push_back(pnode->addr);
2865 : : }
2866 : : }
2867 : :
2868 [ + - ]: 27 : return ret;
2869 : 27 : }
2870 : :
2871 : 10729 : std::vector<AddedNodeInfo> CConnman::GetAddedNodeInfo(bool include_connected) const
2872 : : {
2873 : 10729 : std::vector<AddedNodeInfo> ret;
2874 : :
2875 [ + - ]: 10729 : std::list<AddedNodeParams> lAddresses(0);
2876 : 10729 : {
2877 [ + - ]: 10729 : LOCK(m_added_nodes_mutex);
2878 [ + - ]: 10729 : ret.reserve(m_added_node_params.size());
2879 [ + - ]: 10729 : std::copy(m_added_node_params.cbegin(), m_added_node_params.cend(), std::back_inserter(lAddresses));
2880 : 0 : }
2881 : :
2882 : :
2883 : : // Build a map of all already connected addresses (by IP:port and by name) to inbound/outbound and resolved CService
2884 [ + - ]: 10729 : std::map<CService, bool> mapConnected;
2885 : 10729 : std::map<std::string, std::pair<bool, CService>> mapConnectedByName;
2886 : 10729 : {
2887 [ + - ]: 10729 : LOCK(m_nodes_mutex);
2888 [ + + ]: 20142 : for (const CNode* pnode : m_nodes) {
2889 [ + - + - ]: 9413 : if (pnode->addr.IsValid()) {
2890 [ + - ]: 9413 : mapConnected[pnode->addr] = pnode->IsInboundConn();
2891 : : }
2892 [ + - ]: 9413 : std::string addrName{pnode->m_addr_name};
2893 [ + - ]: 9413 : if (!addrName.empty()) {
2894 [ + - ]: 9413 : mapConnectedByName[std::move(addrName)] = std::make_pair(pnode->IsInboundConn(), static_cast<const CService&>(pnode->addr));
2895 : : }
2896 : 9413 : }
2897 : 0 : }
2898 : :
2899 [ + + ]: 10762 : for (const auto& addr : lAddresses) {
2900 [ + - + - : 66 : CService service{MaybeFlipIPv6toCJDNS(LookupNumeric(addr.m_added_node, GetDefaultPort(addr.m_added_node)))};
+ - + - ]
2901 [ + - + - ]: 33 : AddedNodeInfo addedNode{addr, CService(), false, false};
2902 [ + - + + ]: 33 : if (service.IsValid()) {
2903 : : // strAddNode is an IP:port
2904 [ + - ]: 31 : auto it = mapConnected.find(service);
2905 [ + + ]: 31 : if (it != mapConnected.end()) {
2906 [ + + ]: 15 : if (!include_connected) {
2907 : 5 : continue;
2908 : : }
2909 : 10 : addedNode.resolvedAddress = service;
2910 : 10 : addedNode.fConnected = true;
2911 : 10 : addedNode.fInbound = it->second;
2912 : : }
2913 : : } else {
2914 : : // strAddNode is a name
2915 : 2 : auto it = mapConnectedByName.find(addr.m_added_node);
2916 [ - + ]: 2 : if (it != mapConnectedByName.end()) {
2917 [ # # ]: 0 : if (!include_connected) {
2918 : 0 : continue;
2919 : : }
2920 : 0 : addedNode.resolvedAddress = it->second.second;
2921 : 0 : addedNode.fConnected = true;
2922 : 0 : addedNode.fInbound = it->second.first;
2923 : : }
2924 : : }
2925 [ + - ]: 28 : ret.emplace_back(std::move(addedNode));
2926 : 33 : }
2927 : :
2928 : 10729 : return ret;
2929 : 10729 : }
2930 : :
2931 : 908 : void CConnman::ThreadOpenAddedConnections()
2932 : : {
2933 : 908 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
2934 : 908 : AssertLockNotHeld(m_reconnections_mutex);
2935 : 20520 : while (true)
2936 : : {
2937 : 10714 : CSemaphoreGrant grant(*semAddnode);
2938 [ + - ]: 10714 : std::vector<AddedNodeInfo> vInfo = GetAddedNodeInfo(/*include_connected=*/false);
2939 : 10714 : bool tried = false;
2940 [ + + ]: 10717 : for (const AddedNodeInfo& info : vInfo) {
2941 [ + - ]: 4 : if (!grant) {
2942 : : // If we've used up our semaphore and need a new one, let's not wait here since while we are waiting
2943 : : // the addednodeinfo state might change.
2944 : : break;
2945 : : }
2946 : 4 : tried = true;
2947 [ + - ]: 4 : CAddress addr(CService(), NODE_NONE);
2948 [ + - ]: 4 : OpenNetworkConnection(addr, false, std::move(grant), info.m_params.m_added_node.c_str(), ConnectionType::MANUAL, info.m_params.m_use_v2transport);
2949 [ + - + + ]: 4 : if (!interruptNet.sleep_for(std::chrono::milliseconds(500))) return;
2950 : 3 : grant = CSemaphoreGrant(*semAddnode, /*fTry=*/true);
2951 : 4 : }
2952 : : // See if any reconnections are desired.
2953 [ + - ]: 10713 : PerformReconnections();
2954 : : // Retry every 60 seconds if a connection was attempted, otherwise two seconds
2955 [ + + + - : 21423 : if (!interruptNet.sleep_for(std::chrono::seconds(tried ? 60 : 2)))
+ + ]
2956 : : return;
2957 : 10714 : }
2958 : : }
2959 : :
2960 : : // if successful, this moves the passed grant to the constructed node
2961 : 606 : void CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant&& grant_outbound, const char *pszDest, ConnectionType conn_type, bool use_v2transport)
2962 : : {
2963 : 606 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
2964 [ - + ]: 606 : assert(conn_type != ConnectionType::INBOUND);
2965 : :
2966 : : //
2967 : : // Initiate outbound network connection
2968 : : //
2969 [ + - ]: 606 : if (interruptNet) {
2970 : : return;
2971 : : }
2972 [ + - ]: 606 : if (!fNetworkActive) {
2973 : : return;
2974 : : }
2975 [ + + ]: 606 : if (!pszDest) {
2976 [ + - + - : 3 : bool banned_or_discouraged = m_banman && (m_banman->IsDiscouraged(addrConnect) || m_banman->IsBanned(addrConnect));
- + ]
2977 [ + - + - : 3 : if (IsLocal(addrConnect) || banned_or_discouraged || AlreadyConnectedToAddress(addrConnect)) {
- + ]
2978 : 0 : return;
2979 : : }
2980 [ + - + - ]: 603 : } else if (FindNode(std::string(pszDest)))
2981 : : return;
2982 : :
2983 [ + - ]: 606 : CNode* pnode = ConnectNode(addrConnect, pszDest, fCountFailure, conn_type, use_v2transport);
2984 : :
2985 [ + + ]: 606 : if (!pnode)
2986 : : return;
2987 : 585 : pnode->grantOutbound = std::move(grant_outbound);
2988 : :
2989 : 585 : m_msgproc->InitializeNode(*pnode, m_local_services);
2990 : 585 : {
2991 : 585 : LOCK(m_nodes_mutex);
2992 [ + - ]: 585 : m_nodes.push_back(pnode);
2993 : :
2994 : : // update connection count by network
2995 [ + + + - ]: 585 : if (pnode->IsManualOrFullOutboundConn()) ++m_network_conn_counts[pnode->addr.GetNetwork()];
2996 : 585 : }
2997 : : }
2998 : :
2999 : : Mutex NetEventsInterface::g_msgproc_mutex;
3000 : :
3001 : 908 : void CConnman::ThreadMessageHandler()
3002 : : {
3003 : 908 : LOCK(NetEventsInterface::g_msgproc_mutex);
3004 : :
3005 [ + + ]: 348291 : while (!flagInterruptMsgProc)
3006 : : {
3007 : 346484 : bool fMoreWork = false;
3008 : :
3009 : 346484 : {
3010 : : // Randomize the order in which we process messages from/to our peers.
3011 : : // This prevents attacks in which an attacker exploits having multiple
3012 : : // consecutive connections in the m_nodes list.
3013 [ + - ]: 346484 : const NodesSnapshot snap{*this, /*shuffle=*/true};
3014 : :
3015 [ + + ]: 750659 : for (CNode* pnode : snap.Nodes()) {
3016 [ + + ]: 404184 : if (pnode->fDisconnect)
3017 : 97 : continue;
3018 : :
3019 : : // Receive messages
3020 [ + - ]: 404087 : bool fMoreNodeWork = m_msgproc->ProcessMessages(pnode, flagInterruptMsgProc);
3021 [ + + + + ]: 404087 : fMoreWork |= (fMoreNodeWork && !pnode->fPauseSend);
3022 [ + + ]: 404087 : if (flagInterruptMsgProc)
3023 : : return;
3024 : : // Send messages
3025 [ + - ]: 404079 : m_msgproc->SendMessages(pnode);
3026 : :
3027 [ + + ]: 404079 : if (flagInterruptMsgProc)
3028 : : return;
3029 : : }
3030 [ + - ]: 346484 : }
3031 : :
3032 [ + - ]: 346475 : WAIT_LOCK(mutexMsgProc, lock);
3033 [ + + ]: 346475 : if (!fMoreWork) {
3034 [ + + + - ]: 798056 : condMsgProc.wait_until(lock, std::chrono::steady_clock::now() + std::chrono::milliseconds(100), [this]() EXCLUSIVE_LOCKS_REQUIRED(mutexMsgProc) { return fMsgProcWake; });
3035 : : }
3036 [ + - ]: 346475 : fMsgProcWake = false;
3037 : 346475 : }
3038 : 908 : }
3039 : :
3040 : 4 : void CConnman::ThreadI2PAcceptIncoming()
3041 : : {
3042 : 4 : static constexpr auto err_wait_begin = 1s;
3043 : 4 : static constexpr auto err_wait_cap = 5min;
3044 : 4 : auto err_wait = err_wait_begin;
3045 : :
3046 : 4 : bool advertising_listen_addr = false;
3047 : 4 : i2p::Connection conn;
3048 : :
3049 : 8 : auto SleepOnFailure = [&]() {
3050 : 4 : interruptNet.sleep_for(err_wait);
3051 [ + - ]: 4 : if (err_wait < err_wait_cap) {
3052 : 4 : err_wait += 1s;
3053 : : }
3054 : 8 : };
3055 : :
3056 [ + - + + ]: 8 : while (!interruptNet) {
3057 : :
3058 [ + - + - ]: 4 : if (!m_i2p_sam_session->Listen(conn)) {
3059 [ - + - - : 4 : if (advertising_listen_addr && conn.me.IsValid()) {
- - ]
3060 [ # # ]: 0 : RemoveLocal(conn.me);
3061 : : advertising_listen_addr = false;
3062 : : }
3063 [ + - ]: 4 : SleepOnFailure();
3064 : 4 : continue;
3065 : : }
3066 : :
3067 [ # # ]: 0 : if (!advertising_listen_addr) {
3068 [ # # ]: 0 : AddLocal(conn.me, LOCAL_MANUAL);
3069 : : advertising_listen_addr = true;
3070 : : }
3071 : :
3072 [ # # # # ]: 0 : if (!m_i2p_sam_session->Accept(conn)) {
3073 [ # # ]: 0 : SleepOnFailure();
3074 : 0 : continue;
3075 : : }
3076 : :
3077 [ # # ]: 0 : CreateNodeFromAcceptedSocket(std::move(conn.sock), NetPermissionFlags::None,
3078 : 0 : CAddress{conn.me, NODE_NONE}, CAddress{conn.peer, NODE_NONE});
3079 : :
3080 : 0 : err_wait = err_wait_begin;
3081 : : }
3082 : 4 : }
3083 : :
3084 : 912 : bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, NetPermissionFlags permissions)
3085 : : {
3086 : 912 : int nOne = 1;
3087 : :
3088 : : // Create socket for listening for incoming connections
3089 : 912 : struct sockaddr_storage sockaddr;
3090 : 912 : socklen_t len = sizeof(sockaddr);
3091 [ - + ]: 912 : if (!addrBind.GetSockAddr((struct sockaddr*)&sockaddr, &len))
3092 : : {
3093 [ # # # # ]: 0 : strError = Untranslated(strprintf("Bind address family for %s not supported", addrBind.ToStringAddrPort()));
3094 [ # # ]: 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Error, "%s\n", strError.original);
3095 : 0 : return false;
3096 : : }
3097 : :
3098 : 912 : std::unique_ptr<Sock> sock = CreateSock(addrBind.GetSAFamily(), SOCK_STREAM, IPPROTO_TCP);
3099 [ - + ]: 912 : if (!sock) {
3100 [ # # # # : 0 : strError = Untranslated(strprintf("Couldn't open socket for incoming connections (socket returned error %s)", NetworkErrorString(WSAGetLastError())));
# # ]
3101 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Error, "%s\n", strError.original);
# # ]
3102 : 0 : return false;
3103 : : }
3104 : :
3105 : : // Allow binding if the port is still in TIME_WAIT state after
3106 : : // the program was closed and restarted.
3107 [ + - - + ]: 912 : if (sock->SetSockOpt(SOL_SOCKET, SO_REUSEADDR, (sockopt_arg_type)&nOne, sizeof(int)) == SOCKET_ERROR) {
3108 [ # # # # : 0 : strError = Untranslated(strprintf("Error setting SO_REUSEADDR on socket: %s, continuing anyway", NetworkErrorString(WSAGetLastError())));
# # ]
3109 [ # # ]: 0 : LogPrintf("%s\n", strError.original);
3110 : : }
3111 : :
3112 : : // some systems don't have IPV6_V6ONLY but are always v6only; others do have the option
3113 : : // and enable it by default or not. Try to enable it, if possible.
3114 [ + + ]: 912 : if (addrBind.IsIPv6()) {
3115 : : #ifdef IPV6_V6ONLY
3116 [ + - - + ]: 2 : if (sock->SetSockOpt(IPPROTO_IPV6, IPV6_V6ONLY, (sockopt_arg_type)&nOne, sizeof(int)) == SOCKET_ERROR) {
3117 [ # # # # : 0 : strError = Untranslated(strprintf("Error setting IPV6_V6ONLY on socket: %s, continuing anyway", NetworkErrorString(WSAGetLastError())));
# # ]
3118 [ # # ]: 0 : LogPrintf("%s\n", strError.original);
3119 : : }
3120 : : #endif
3121 : : #ifdef WIN32
3122 : : int nProtLevel = PROTECTION_LEVEL_UNRESTRICTED;
3123 : : if (sock->SetSockOpt(IPPROTO_IPV6, IPV6_PROTECTION_LEVEL, (const char*)&nProtLevel, sizeof(int)) == SOCKET_ERROR) {
3124 : : strError = Untranslated(strprintf("Error setting IPV6_PROTECTION_LEVEL on socket: %s, continuing anyway", NetworkErrorString(WSAGetLastError())));
3125 : : LogPrintf("%s\n", strError.original);
3126 : : }
3127 : : #endif
3128 : : }
3129 : :
3130 [ + - - + ]: 912 : if (sock->Bind(reinterpret_cast<struct sockaddr*>(&sockaddr), len) == SOCKET_ERROR) {
3131 : 0 : int nErr = WSAGetLastError();
3132 [ # # ]: 0 : if (nErr == WSAEADDRINUSE)
3133 [ # # # # ]: 0 : strError = strprintf(_("Unable to bind to %s on this computer. %s is probably already running."), addrBind.ToStringAddrPort(), CLIENT_NAME);
3134 : : else
3135 [ # # # # : 0 : strError = strprintf(_("Unable to bind to %s on this computer (bind returned error %s)"), addrBind.ToStringAddrPort(), NetworkErrorString(nErr));
# # ]
3136 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Error, "%s\n", strError.original);
# # ]
3137 : 0 : return false;
3138 : : }
3139 [ + - + - ]: 912 : LogPrintf("Bound to %s\n", addrBind.ToStringAddrPort());
3140 : :
3141 : : // Listen for incoming connections
3142 [ + - - + ]: 912 : if (sock->Listen(SOMAXCONN) == SOCKET_ERROR)
3143 : : {
3144 [ # # # # ]: 0 : strError = strprintf(_("Listening for incoming connections failed (listen returned error %s)"), NetworkErrorString(WSAGetLastError()));
3145 [ # # # # : 0 : LogPrintLevel(BCLog::NET, BCLog::Level::Error, "%s\n", strError.original);
# # ]
3146 : 0 : return false;
3147 : : }
3148 : :
3149 [ + - ]: 912 : vhListenSocket.emplace_back(std::move(sock), permissions);
3150 : : return true;
3151 : 912 : }
3152 : :
3153 : 13 : void Discover()
3154 : : {
3155 [ - + ]: 13 : if (!fDiscover)
3156 : : return;
3157 : :
3158 [ # # ]: 0 : for (const CNetAddr &addr: GetLocalAddresses()) {
3159 [ # # # # ]: 0 : if (AddLocal(addr, LOCAL_IF))
3160 [ # # # # ]: 0 : LogPrintf("%s: %s\n", __func__, addr.ToStringAddr());
3161 : 0 : }
3162 : : }
3163 : :
3164 : 1156 : void CConnman::SetNetworkActive(bool active)
3165 : : {
3166 : 1156 : LogPrintf("%s: %s\n", __func__, active);
3167 : :
3168 [ + + ]: 1156 : if (fNetworkActive == active) {
3169 : : return;
3170 : : }
3171 : :
3172 [ + + ]: 26 : fNetworkActive = active;
3173 : :
3174 [ + + ]: 26 : if (m_client_interface) {
3175 : 21 : m_client_interface->NotifyNetworkActiveChanged(fNetworkActive);
3176 : : }
3177 : : }
3178 : :
3179 : 1133 : CConnman::CConnman(uint64_t nSeed0In, uint64_t nSeed1In, AddrMan& addrman_in,
3180 : 1133 : const NetGroupManager& netgroupman, const CChainParams& params, bool network_active)
3181 : 1133 : : addrman(addrman_in)
3182 [ + - ]: 1133 : , m_netgroupman{netgroupman}
3183 : 1133 : , nSeed0(nSeed0In)
3184 : 1133 : , nSeed1(nSeed1In)
3185 [ + - + - : 1133 : , m_params(params)
+ - + - ]
3186 : : {
3187 [ + - ]: 1133 : SetTryNewOutboundPeer(false);
3188 : :
3189 : 1133 : Options connOptions;
3190 [ + - ]: 1133 : Init(connOptions);
3191 [ + - ]: 1133 : SetNetworkActive(network_active);
3192 : 1133 : }
3193 : :
3194 : 1535 : NodeId CConnman::GetNewNodeId()
3195 : : {
3196 : 1535 : return nLastNodeId.fetch_add(1, std::memory_order_relaxed);
3197 : : }
3198 : :
3199 : 2 : uint16_t CConnman::GetDefaultPort(Network net) const
3200 : : {
3201 [ - + ]: 2 : return net == NET_I2P ? I2P_SAM31_PORT : m_params.GetDefaultPort();
3202 : : }
3203 : :
3204 : 677 : uint16_t CConnman::GetDefaultPort(const std::string& addr) const
3205 : : {
3206 : 677 : CNetAddr a;
3207 [ + - + + : 677 : return a.SetSpecial(addr) ? GetDefaultPort(a.GetNetwork()) : m_params.GetDefaultPort();
+ - + - ]
3208 : 677 : }
3209 : :
3210 : 912 : bool CConnman::Bind(const CService& addr_, unsigned int flags, NetPermissionFlags permissions)
3211 : : {
3212 : 912 : const CService addr{MaybeFlipIPv6toCJDNS(addr_)};
3213 : :
3214 [ + - ]: 912 : bilingual_str strError;
3215 [ + - - + ]: 912 : if (!BindListenPort(addr, strError, permissions)) {
3216 [ # # # # ]: 0 : if ((flags & BF_REPORT_ERROR) && m_client_interface) {
3217 [ # # # # ]: 0 : m_client_interface->ThreadSafeMessageBox(strError, "", CClientUIInterface::MSG_ERROR);
3218 : : }
3219 : 0 : return false;
3220 : : }
3221 : :
3222 [ + - - + : 912 : if (addr.IsRoutable() && fDiscover && !(flags & BF_DONT_ADVERTISE) && !NetPermissions::HasFlag(permissions, NetPermissionFlags::NoBan)) {
- - - - -
- ]
3223 [ # # ]: 0 : AddLocal(addr, LOCAL_BIND);
3224 : : }
3225 : :
3226 : : return true;
3227 : 912 : }
3228 : :
3229 : 897 : bool CConnman::InitBinds(const Options& options)
3230 : : {
3231 [ + + ]: 1789 : for (const auto& addrBind : options.vBinds) {
3232 [ + - ]: 892 : if (!Bind(addrBind, BF_REPORT_ERROR, NetPermissionFlags::None)) {
3233 : : return false;
3234 : : }
3235 : : }
3236 [ + + ]: 898 : for (const auto& addrBind : options.vWhiteBinds) {
3237 [ + - ]: 1 : if (!Bind(addrBind.m_service, BF_REPORT_ERROR, addrBind.m_flags)) {
3238 : : return false;
3239 : : }
3240 : : }
3241 [ + + ]: 912 : for (const auto& addr_bind : options.onion_binds) {
3242 [ + - ]: 15 : if (!Bind(addr_bind, BF_REPORT_ERROR | BF_DONT_ADVERTISE, NetPermissionFlags::None)) {
3243 : : return false;
3244 : : }
3245 : : }
3246 [ + + ]: 897 : if (options.bind_on_any) {
3247 : : // Don't consider errors to bind on IPv6 "::" fatal because the host OS
3248 : : // may not have IPv6 support and the user did not explicitly ask us to
3249 : : // bind on that.
3250 : 2 : const CService ipv6_any{in6_addr(IN6ADDR_ANY_INIT), GetListenPort()}; // ::
3251 [ + - ]: 2 : Bind(ipv6_any, BF_NONE, NetPermissionFlags::None);
3252 : :
3253 : 2 : struct in_addr inaddr_any;
3254 : 2 : inaddr_any.s_addr = htonl(INADDR_ANY);
3255 [ + - + - ]: 2 : const CService ipv4_any{inaddr_any, GetListenPort()}; // 0.0.0.0
3256 [ + - - + ]: 2 : if (!Bind(ipv4_any, BF_REPORT_ERROR, NetPermissionFlags::None)) {
3257 : 0 : return false;
3258 : : }
3259 : 2 : }
3260 : : return true;
3261 : : }
3262 : :
3263 : 908 : bool CConnman::Start(CScheduler& scheduler, const Options& connOptions)
3264 : : {
3265 : 908 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3266 : 908 : Init(connOptions);
3267 : :
3268 [ + + - + ]: 908 : if (fListen && !InitBinds(connOptions)) {
3269 [ # # ]: 0 : if (m_client_interface) {
3270 [ # # ]: 0 : m_client_interface->ThreadSafeMessageBox(
3271 [ # # ]: 0 : _("Failed to listen on any port. Use -listen=0 if you want this."),
3272 : : "", CClientUIInterface::MSG_ERROR);
3273 : : }
3274 : 0 : return false;
3275 : : }
3276 : :
3277 : 908 : Proxy i2p_sam;
3278 [ + - + + : 908 : if (GetProxy(NET_I2P, i2p_sam) && connOptions.m_i2p_accept_incoming) {
+ + ]
3279 [ + - + - ]: 20 : m_i2p_sam_session = std::make_unique<i2p::sam::Session>(gArgs.GetDataDirNet() / "i2p_private_key",
3280 [ + - ]: 8 : i2p_sam, &interruptNet);
3281 : : }
3282 : :
3283 : : // Randomize the order in which we may query seednode to potentially prevent connecting to the same one every restart (and signal that we have restarted)
3284 [ + - ]: 908 : std::vector<std::string> seed_nodes = connOptions.vSeedNodes;
3285 [ + + ]: 908 : if (!seed_nodes.empty()) {
3286 : 5 : std::shuffle(seed_nodes.begin(), seed_nodes.end(), FastRandomContext{});
3287 : : }
3288 : :
3289 [ + + ]: 908 : if (m_use_addrman_outgoing) {
3290 : : // Load addresses from anchors.dat
3291 [ + - + - : 81 : m_anchors = ReadAnchors(gArgs.GetDataDirNet() / ANCHORS_DATABASE_FILENAME);
+ - ]
3292 [ - + ]: 27 : if (m_anchors.size() > MAX_BLOCK_RELAY_ONLY_ANCHORS) {
3293 [ # # ]: 0 : m_anchors.resize(MAX_BLOCK_RELAY_ONLY_ANCHORS);
3294 : : }
3295 [ + - ]: 27 : LogPrintf("%i block-relay-only anchors will be tried for connections.\n", m_anchors.size());
3296 : : }
3297 : :
3298 [ + - ]: 908 : if (m_client_interface) {
3299 [ + - + - ]: 1816 : m_client_interface->InitMessage(_("Starting network threads…"));
3300 : : }
3301 : :
3302 : 908 : fAddressesInitialized = true;
3303 : :
3304 [ + - ]: 908 : if (semOutbound == nullptr) {
3305 : : // initialize semaphore
3306 [ + + + - ]: 910 : semOutbound = std::make_unique<CSemaphore>(std::min(m_max_automatic_outbound, m_max_automatic_connections));
3307 : : }
3308 [ + - ]: 908 : if (semAddnode == nullptr) {
3309 : : // initialize semaphore
3310 [ + - ]: 908 : semAddnode = std::make_unique<CSemaphore>(m_max_addnode);
3311 : : }
3312 : :
3313 : : //
3314 : : // Start threads
3315 : : //
3316 [ - + ]: 908 : assert(m_msgproc);
3317 [ + - ]: 908 : interruptNet.reset();
3318 [ + - ]: 908 : flagInterruptMsgProc = false;
3319 : :
3320 : 908 : {
3321 [ + - ]: 908 : LOCK(mutexMsgProc);
3322 [ + - ]: 908 : fMsgProcWake = false;
3323 : 908 : }
3324 : :
3325 : : // Send and receive from sockets, accept connections
3326 [ + - ]: 1816 : threadSocketHandler = std::thread(&util::TraceThread, "net", [this] { ThreadSocketHandler(); });
3327 : :
3328 [ + - + - : 908 : if (!gArgs.GetBoolArg("-dnsseed", DEFAULT_DNSSEED))
+ + ]
3329 [ + - ]: 897 : LogPrintf("DNS seeding disabled\n");
3330 : : else
3331 [ + - ]: 22 : threadDNSAddressSeed = std::thread(&util::TraceThread, "dnsseed", [this] { ThreadDNSAddressSeed(); });
3332 : :
3333 : : // Initiate manual connections
3334 [ + - ]: 1816 : threadOpenAddedConnections = std::thread(&util::TraceThread, "addcon", [this] { ThreadOpenAddedConnections(); });
3335 : :
3336 [ + + + - ]: 908 : if (connOptions.m_use_addrman_outgoing && !connOptions.m_specified_outgoing.empty()) {
3337 [ # # ]: 0 : if (m_client_interface) {
3338 [ # # # # ]: 0 : m_client_interface->ThreadSafeMessageBox(
3339 [ # # ]: 0 : _("Cannot provide specific connections and have addrman find outgoing connections at the same time."),
3340 : : "", CClientUIInterface::MSG_ERROR);
3341 : : }
3342 : 0 : return false;
3343 : : }
3344 [ + + + + ]: 908 : if (connOptions.m_use_addrman_outgoing || !connOptions.m_specified_outgoing.empty()) {
3345 : 32 : threadOpenConnections = std::thread(
3346 [ + - ]: 32 : &util::TraceThread, "opencon",
3347 [ + - + - : 128 : [this, connect = connOptions.m_specified_outgoing, seed_nodes = std::move(seed_nodes)] { ThreadOpenConnections(connect, seed_nodes); });
+ - ]
3348 : : }
3349 : :
3350 : : // Process messages
3351 [ + - ]: 1816 : threadMessageHandler = std::thread(&util::TraceThread, "msghand", [this] { ThreadMessageHandler(); });
3352 : :
3353 [ + + ]: 908 : if (m_i2p_sam_session) {
3354 : 4 : threadI2PAcceptIncoming =
3355 [ + - ]: 8 : std::thread(&util::TraceThread, "i2paccept", [this] { ThreadI2PAcceptIncoming(); });
3356 : : }
3357 : :
3358 : : // Dump network addresses
3359 [ + - ]: 921 : scheduler.scheduleEvery([this] { DumpAddresses(); }, DUMP_PEERS_INTERVAL);
3360 : :
3361 : : // Run the ASMap Health check once and then schedule it to run every 24h.
3362 [ + - + + ]: 908 : if (m_netgroupman.UsingASMap()) {
3363 [ + - ]: 7 : ASMapHealthCheck();
3364 [ + - ]: 14 : scheduler.scheduleEvery([this] { ASMapHealthCheck(); }, ASMAP_HEALTH_CHECK_INTERVAL);
3365 : : }
3366 : :
3367 : : return true;
3368 : 1816 : }
3369 : :
3370 : : class CNetCleanup
3371 : : {
3372 : : public:
3373 : : CNetCleanup() = default;
3374 : :
3375 : 1203 : ~CNetCleanup()
3376 : : {
3377 : : #ifdef WIN32
3378 : : // Shutdown Windows Sockets
3379 : : WSACleanup();
3380 : : #endif
3381 : 1203 : }
3382 : : };
3383 : : static CNetCleanup instance_of_cnetcleanup;
3384 : :
3385 : 2091 : void CConnman::Interrupt()
3386 : : {
3387 : 2091 : {
3388 : 2091 : LOCK(mutexMsgProc);
3389 [ + - ]: 2091 : flagInterruptMsgProc = true;
3390 : 2091 : }
3391 : 2091 : condMsgProc.notify_all();
3392 : :
3393 : 2091 : interruptNet();
3394 : 2091 : g_socks5_interrupt();
3395 : :
3396 [ + + ]: 2091 : if (semOutbound) {
3397 [ + + ]: 10876 : for (int i=0; i<m_max_automatic_outbound; i++) {
3398 : 9968 : semOutbound->post();
3399 : : }
3400 : : }
3401 : :
3402 [ + + ]: 2091 : if (semAddnode) {
3403 [ + + ]: 8172 : for (int i=0; i<m_max_addnode; i++) {
3404 : 7264 : semAddnode->post();
3405 : : }
3406 : : }
3407 : 2091 : }
3408 : :
3409 : 2091 : void CConnman::StopThreads()
3410 : : {
3411 [ + + ]: 2091 : if (threadI2PAcceptIncoming.joinable()) {
3412 : 4 : threadI2PAcceptIncoming.join();
3413 : : }
3414 [ + + ]: 2091 : if (threadMessageHandler.joinable())
3415 : 908 : threadMessageHandler.join();
3416 [ + + ]: 2091 : if (threadOpenConnections.joinable())
3417 : 32 : threadOpenConnections.join();
3418 [ + + ]: 2091 : if (threadOpenAddedConnections.joinable())
3419 : 908 : threadOpenAddedConnections.join();
3420 [ + + ]: 2091 : if (threadDNSAddressSeed.joinable())
3421 : 11 : threadDNSAddressSeed.join();
3422 [ + + ]: 2091 : if (threadSocketHandler.joinable())
3423 : 908 : threadSocketHandler.join();
3424 : 2091 : }
3425 : :
3426 : 2091 : void CConnman::StopNodes()
3427 : : {
3428 [ + + ]: 2091 : if (fAddressesInitialized) {
3429 : 908 : DumpAddresses();
3430 : 908 : fAddressesInitialized = false;
3431 : :
3432 [ + + ]: 908 : if (m_use_addrman_outgoing) {
3433 : : // Anchor connections are only dumped during clean shutdown.
3434 : 27 : std::vector<CAddress> anchors_to_dump = GetCurrentBlockRelayOnlyConns();
3435 [ - + ]: 27 : if (anchors_to_dump.size() > MAX_BLOCK_RELAY_ONLY_ANCHORS) {
3436 [ # # ]: 0 : anchors_to_dump.resize(MAX_BLOCK_RELAY_ONLY_ANCHORS);
3437 : : }
3438 [ + - + - : 81 : DumpAnchors(gArgs.GetDataDirNet() / ANCHORS_DATABASE_FILENAME, anchors_to_dump);
+ - ]
3439 : 27 : }
3440 : : }
3441 : :
3442 : : // Delete peer connections.
3443 : 2091 : std::vector<CNode*> nodes;
3444 [ + - + - ]: 4182 : WITH_LOCK(m_nodes_mutex, nodes.swap(m_nodes));
3445 [ + + ]: 2813 : for (CNode* pnode : nodes) {
3446 [ + - + - : 1444 : LogDebug(BCLog::NET, "%s\n", pnode->DisconnectMsg(fLogIPs));
+ - + - ]
3447 [ + - ]: 722 : pnode->CloseSocketDisconnect();
3448 [ + - ]: 722 : DeleteNode(pnode);
3449 : : }
3450 : :
3451 [ - + ]: 2091 : for (CNode* pnode : m_nodes_disconnected) {
3452 [ # # ]: 0 : DeleteNode(pnode);
3453 : : }
3454 : 2091 : m_nodes_disconnected.clear();
3455 : 2091 : vhListenSocket.clear();
3456 [ + + ]: 2091 : semOutbound.reset();
3457 [ + + ]: 2999 : semAddnode.reset();
3458 : 2091 : }
3459 : :
3460 : 1535 : void CConnman::DeleteNode(CNode* pnode)
3461 : : {
3462 [ - + ]: 1535 : assert(pnode);
3463 : 1535 : m_msgproc->FinalizeNode(*pnode);
3464 : 1535 : delete pnode;
3465 : 1535 : }
3466 : :
3467 : 1133 : CConnman::~CConnman()
3468 : : {
3469 : 1133 : Interrupt();
3470 : 1133 : Stop();
3471 : 1133 : }
3472 : :
3473 : 446 : std::vector<CAddress> CConnman::GetAddresses(size_t max_addresses, size_t max_pct, std::optional<Network> network, const bool filtered) const
3474 : : {
3475 : 446 : std::vector<CAddress> addresses = addrman.GetAddr(max_addresses, max_pct, network, filtered);
3476 [ + - ]: 446 : if (m_banman) {
3477 [ + - ]: 446 : addresses.erase(std::remove_if(addresses.begin(), addresses.end(),
3478 [ + - - + ]: 34302 : [this](const CAddress& addr){return m_banman->IsDiscouraged(addr) || m_banman->IsBanned(addr);}),
3479 [ + - ]: 446 : addresses.end());
3480 : : }
3481 : 446 : return addresses;
3482 : 0 : }
3483 : :
3484 : 882 : std::vector<CAddress> CConnman::GetAddresses(CNode& requestor, size_t max_addresses, size_t max_pct)
3485 : : {
3486 : 882 : auto local_socket_bytes = requestor.addrBind.GetAddrBytes();
3487 [ + - ]: 882 : uint64_t cache_id = GetDeterministicRandomizer(RANDOMIZER_ID_ADDRCACHE)
3488 [ + - + - : 882 : .Write(requestor.ConnectedThroughNetwork())
+ - ]
3489 [ + - + - ]: 882 : .Write(local_socket_bytes)
3490 : : // For outbound connections, the port of the bound address is randomly
3491 : : // assigned by the OS and would therefore not be useful for seeding.
3492 [ + - + - : 882 : .Write(requestor.IsInboundConn() ? requestor.addrBind.GetPort() : 0)
+ - ]
3493 [ + - ]: 882 : .Finalize();
3494 : 882 : const auto current_time = GetTime<std::chrono::microseconds>();
3495 [ + - ]: 882 : auto r = m_addr_response_caches.emplace(cache_id, CachedAddrResponse{});
3496 [ + + ]: 882 : CachedAddrResponse& cache_entry = r.first->second;
3497 [ + + ]: 882 : if (cache_entry.m_cache_entry_expiration < current_time) { // If emplace() added new one it has expiration 0.
3498 [ + - ]: 363 : cache_entry.m_addrs_response_cache = GetAddresses(max_addresses, max_pct, /*network=*/std::nullopt);
3499 : : // Choosing a proper cache lifetime is a trade-off between the privacy leak minimization
3500 : : // and the usefulness of ADDR responses to honest users.
3501 : : //
3502 : : // Longer cache lifetime makes it more difficult for an attacker to scrape
3503 : : // enough AddrMan data to maliciously infer something useful.
3504 : : // By the time an attacker scraped enough AddrMan records, most of
3505 : : // the records should be old enough to not leak topology info by
3506 : : // e.g. analyzing real-time changes in timestamps.
3507 : : //
3508 : : // It takes only several hundred requests to scrape everything from an AddrMan containing 100,000 nodes,
3509 : : // so ~24 hours of cache lifetime indeed makes the data less inferable by the time
3510 : : // most of it could be scraped (considering that timestamps are updated via
3511 : : // ADDR self-announcements and when nodes communicate).
3512 : : // We also should be robust to those attacks which may not require scraping *full* victim's AddrMan
3513 : : // (because even several timestamps of the same handful of nodes may leak privacy).
3514 : : //
3515 : : // On the other hand, longer cache lifetime makes ADDR responses
3516 : : // outdated and less useful for an honest requestor, e.g. if most nodes
3517 : : // in the ADDR response are no longer active.
3518 : : //
3519 : : // However, the churn in the network is known to be rather low. Since we consider
3520 : : // nodes to be "terrible" (see IsTerrible()) if the timestamps are older than 30 days,
3521 : : // max. 24 hours of "penalty" due to cache shouldn't make any meaningful difference
3522 : : // in terms of the freshness of the response.
3523 : 363 : cache_entry.m_cache_entry_expiration = current_time +
3524 : 363 : 21h + FastRandomContext().randrange<std::chrono::microseconds>(6h);
3525 : : }
3526 [ + - ]: 882 : return cache_entry.m_addrs_response_cache;
3527 : 882 : }
3528 : :
3529 : 15 : bool CConnman::AddNode(const AddedNodeParams& add)
3530 : : {
3531 [ + - + - ]: 15 : const CService resolved(LookupNumeric(add.m_added_node, GetDefaultPort(add.m_added_node)));
3532 [ + - ]: 15 : const bool resolved_is_valid{resolved.IsValid()};
3533 : :
3534 [ + - ]: 15 : LOCK(m_added_nodes_mutex);
3535 [ + + ]: 27 : for (const auto& it : m_added_node_params) {
3536 [ + + + - : 50 : if (add.m_added_node == it.m_added_node || (resolved_is_valid && resolved == LookupNumeric(it.m_added_node, GetDefaultPort(it.m_added_node)))) return false;
+ - + - +
- + - + +
+ + + + -
- - - ]
3537 : : }
3538 : :
3539 [ + - ]: 9 : m_added_node_params.push_back(add);
3540 : : return true;
3541 : 15 : }
3542 : :
3543 : 4 : bool CConnman::RemoveAddedNode(const std::string& strNode)
3544 : : {
3545 : 4 : LOCK(m_added_nodes_mutex);
3546 [ + + ]: 6 : for (auto it = m_added_node_params.begin(); it != m_added_node_params.end(); ++it) {
3547 [ + + ]: 4 : if (strNode == it->m_added_node) {
3548 : 2 : m_added_node_params.erase(it);
3549 : 2 : return true;
3550 : : }
3551 : : }
3552 : : return false;
3553 : 4 : }
3554 : :
3555 : 8 : bool CConnman::AddedNodesContain(const CAddress& addr) const
3556 : : {
3557 : 8 : AssertLockNotHeld(m_added_nodes_mutex);
3558 : 8 : const std::string addr_str{addr.ToStringAddr()};
3559 [ + - ]: 8 : const std::string addr_port_str{addr.ToStringAddrPort()};
3560 [ + - ]: 8 : LOCK(m_added_nodes_mutex);
3561 [ + - ]: 8 : return (m_added_node_params.size() < 24 // bound the query to a reasonable limit
3562 [ + - + + ]: 8 : && std::any_of(m_added_node_params.cbegin(), m_added_node_params.cend(),
3563 [ + - + + : 28 : [&](const auto& p) { return p.m_added_node == addr_str || p.m_added_node == addr_port_str; }));
+ - ]
3564 : 8 : }
3565 : :
3566 : 2889 : size_t CConnman::GetNodeCount(ConnectionDirection flags) const
3567 : : {
3568 : 2889 : LOCK(m_nodes_mutex);
3569 [ + + ]: 2889 : if (flags == ConnectionDirection::Both) // Shortcut if we want total
3570 : 967 : return m_nodes.size();
3571 : :
3572 : 1922 : int nNum = 0;
3573 [ + + ]: 4708 : for (const auto& pnode : m_nodes) {
3574 [ + + + + ]: 4304 : if (flags & (pnode->IsInboundConn() ? ConnectionDirection::In : ConnectionDirection::Out)) {
3575 : 1393 : nNum++;
3576 : : }
3577 : : }
3578 : :
3579 : 1922 : return nNum;
3580 : 2889 : }
3581 : :
3582 : :
3583 : 0 : std::map<CNetAddr, LocalServiceInfo> CConnman::getNetLocalAddresses() const
3584 : : {
3585 : 0 : LOCK(g_maplocalhost_mutex);
3586 [ # # # # ]: 0 : return mapLocalHost;
3587 : 0 : }
3588 : :
3589 : 13321 : uint32_t CConnman::GetMappedAS(const CNetAddr& addr) const
3590 : : {
3591 : 13321 : return m_netgroupman.GetMappedAS(addr);
3592 : : }
3593 : :
3594 : 5887 : void CConnman::GetNodeStats(std::vector<CNodeStats>& vstats) const
3595 : : {
3596 : 5887 : vstats.clear();
3597 : 5887 : LOCK(m_nodes_mutex);
3598 [ + - ]: 5887 : vstats.reserve(m_nodes.size());
3599 [ + + ]: 16230 : for (CNode* pnode : m_nodes) {
3600 [ + - ]: 10343 : vstats.emplace_back();
3601 [ + - ]: 10343 : pnode->CopyStats(vstats.back());
3602 [ + - ]: 10343 : vstats.back().m_mapped_as = GetMappedAS(pnode->addr);
3603 : : }
3604 : 5887 : }
3605 : :
3606 : 4 : bool CConnman::DisconnectNode(const std::string& strNode)
3607 : : {
3608 : 4 : LOCK(m_nodes_mutex);
3609 [ + - + + ]: 4 : if (CNode* pnode = FindNode(strNode)) {
3610 [ + - + - : 4 : LogDebug(BCLog::NET, "disconnect by address%s matched peer=%d; disconnecting\n", (fLogIPs ? strprintf("=%s", strNode) : ""), pnode->GetId());
- + - - +
- + - ]
3611 : 2 : pnode->fDisconnect = true;
3612 : 2 : return true;
3613 : : }
3614 : : return false;
3615 : 4 : }
3616 : :
3617 : 33 : bool CConnman::DisconnectNode(const CSubNet& subnet)
3618 : : {
3619 : 33 : bool disconnected = false;
3620 : 33 : LOCK(m_nodes_mutex);
3621 [ + + ]: 49 : for (CNode* pnode : m_nodes) {
3622 [ + - + + ]: 16 : if (subnet.Match(pnode->addr)) {
3623 [ + - + - : 22 : LogDebug(BCLog::NET, "disconnect by subnet%s matched peer=%d; disconnecting\n", (fLogIPs ? strprintf("=%s", subnet.ToString()) : ""), pnode->GetId());
- + - - -
- + - + -
- + - - ]
3624 : 11 : pnode->fDisconnect = true;
3625 : 11 : disconnected = true;
3626 : : }
3627 : : }
3628 [ + - ]: 33 : return disconnected;
3629 : 33 : }
3630 : :
3631 : 20 : bool CConnman::DisconnectNode(const CNetAddr& addr)
3632 : : {
3633 [ + - ]: 20 : return DisconnectNode(CSubNet(addr));
3634 : : }
3635 : :
3636 : 120 : bool CConnman::DisconnectNode(NodeId id)
3637 : : {
3638 : 120 : LOCK(m_nodes_mutex);
3639 [ + - ]: 179 : for(CNode* pnode : m_nodes) {
3640 [ + + ]: 179 : if (id == pnode->GetId()) {
3641 [ + - + - : 120 : LogDebug(BCLog::NET, "disconnect by id peer=%d; disconnecting\n", pnode->GetId());
+ - ]
3642 : 120 : pnode->fDisconnect = true;
3643 : 120 : return true;
3644 : : }
3645 : : }
3646 : : return false;
3647 : 120 : }
3648 : :
3649 : 245149 : void CConnman::RecordBytesRecv(uint64_t bytes)
3650 : : {
3651 : 245149 : nTotalBytesRecv += bytes;
3652 : 245149 : }
3653 : :
3654 : 167005 : void CConnman::RecordBytesSent(uint64_t bytes)
3655 : : {
3656 : 167005 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3657 : 167005 : LOCK(m_total_bytes_sent_mutex);
3658 : :
3659 : 167005 : nTotalBytesSent += bytes;
3660 : :
3661 : 167005 : const auto now = GetTime<std::chrono::seconds>();
3662 [ + + ]: 167005 : if (nMaxOutboundCycleStartTime + MAX_UPLOAD_TIMEFRAME < now)
3663 : : {
3664 : : // timeframe expired, reset cycle
3665 : 513 : nMaxOutboundCycleStartTime = now;
3666 : 513 : nMaxOutboundTotalBytesSentInCycle = 0;
3667 : : }
3668 : :
3669 [ + - ]: 167005 : nMaxOutboundTotalBytesSentInCycle += bytes;
3670 : 167005 : }
3671 : :
3672 : 17 : uint64_t CConnman::GetMaxOutboundTarget() const
3673 : : {
3674 : 17 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3675 : 17 : LOCK(m_total_bytes_sent_mutex);
3676 [ + - ]: 17 : return nMaxOutboundLimit;
3677 : 17 : }
3678 : :
3679 : 17 : std::chrono::seconds CConnman::GetMaxOutboundTimeframe() const
3680 : : {
3681 : 17 : return MAX_UPLOAD_TIMEFRAME;
3682 : : }
3683 : :
3684 : 17 : std::chrono::seconds CConnman::GetMaxOutboundTimeLeftInCycle() const
3685 : : {
3686 : 17 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3687 : 17 : LOCK(m_total_bytes_sent_mutex);
3688 [ + - ]: 17 : return GetMaxOutboundTimeLeftInCycle_();
3689 : 17 : }
3690 : :
3691 : 1125 : std::chrono::seconds CConnman::GetMaxOutboundTimeLeftInCycle_() const
3692 : : {
3693 : 1125 : AssertLockHeld(m_total_bytes_sent_mutex);
3694 : :
3695 [ + + ]: 1125 : if (nMaxOutboundLimit == 0)
3696 : 11 : return 0s;
3697 : :
3698 [ + + ]: 1114 : if (nMaxOutboundCycleStartTime.count() == 0)
3699 : 4 : return MAX_UPLOAD_TIMEFRAME;
3700 : :
3701 : 1110 : const std::chrono::seconds cycleEndTime = nMaxOutboundCycleStartTime + MAX_UPLOAD_TIMEFRAME;
3702 : 1110 : const auto now = GetTime<std::chrono::seconds>();
3703 [ - + ]: 1110 : return (cycleEndTime < now) ? 0s : cycleEndTime - now;
3704 : : }
3705 : :
3706 : 39550 : bool CConnman::OutboundTargetReached(bool historicalBlockServingLimit) const
3707 : : {
3708 : 39550 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3709 : 39550 : LOCK(m_total_bytes_sent_mutex);
3710 [ + + ]: 39550 : if (nMaxOutboundLimit == 0)
3711 : : return false;
3712 : :
3713 [ + + ]: 1116 : if (historicalBlockServingLimit)
3714 : : {
3715 : : // keep a large enough buffer to at least relay each block once
3716 [ + - ]: 1108 : const std::chrono::seconds timeLeftInCycle = GetMaxOutboundTimeLeftInCycle_();
3717 : 1108 : const uint64_t buffer = timeLeftInCycle / std::chrono::minutes{10} * MAX_BLOCK_SERIALIZED_SIZE;
3718 [ + + + + ]: 1108 : if (buffer >= nMaxOutboundLimit || nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit - buffer)
3719 : 827 : return true;
3720 : : }
3721 [ + + ]: 8 : else if (nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit)
3722 : 3 : return true;
3723 : :
3724 : : return false;
3725 : 39550 : }
3726 : :
3727 : 17 : uint64_t CConnman::GetOutboundTargetBytesLeft() const
3728 : : {
3729 : 17 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3730 : 17 : LOCK(m_total_bytes_sent_mutex);
3731 [ + + ]: 17 : if (nMaxOutboundLimit == 0)
3732 : : return 0;
3733 : :
3734 [ + + ]: 6 : return (nMaxOutboundTotalBytesSentInCycle >= nMaxOutboundLimit) ? 0 : nMaxOutboundLimit - nMaxOutboundTotalBytesSentInCycle;
3735 : 17 : }
3736 : :
3737 : 17 : uint64_t CConnman::GetTotalBytesRecv() const
3738 : : {
3739 : 17 : return nTotalBytesRecv;
3740 : : }
3741 : :
3742 : 17 : uint64_t CConnman::GetTotalBytesSent() const
3743 : : {
3744 : 17 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3745 : 17 : LOCK(m_total_bytes_sent_mutex);
3746 [ + - ]: 17 : return nTotalBytesSent;
3747 : 17 : }
3748 : :
3749 : 4619 : ServiceFlags CConnman::GetLocalServices() const
3750 : : {
3751 : 4619 : return m_local_services;
3752 : : }
3753 : :
3754 : 1575 : static std::unique_ptr<Transport> MakeTransport(NodeId id, bool use_v2transport, bool inbound) noexcept
3755 : : {
3756 [ + + ]: 1575 : if (use_v2transport) {
3757 [ - + ]: 200 : return std::make_unique<V2Transport>(id, /*initiating=*/!inbound);
3758 : : } else {
3759 [ - + ]: 1375 : return std::make_unique<V1Transport>(id);
3760 : : }
3761 : : }
3762 : :
3763 : 1575 : CNode::CNode(NodeId idIn,
3764 : : std::shared_ptr<Sock> sock,
3765 : : const CAddress& addrIn,
3766 : : uint64_t nKeyedNetGroupIn,
3767 : : uint64_t nLocalHostNonceIn,
3768 : : const CAddress& addrBindIn,
3769 : : const std::string& addrNameIn,
3770 : : ConnectionType conn_type_in,
3771 : : bool inbound_onion,
3772 : 1575 : CNodeOptions&& node_opts)
3773 : 1575 : : m_transport{MakeTransport(idIn, node_opts.use_v2transport, conn_type_in == ConnectionType::INBOUND)},
3774 : 1575 : m_permission_flags{node_opts.permission_flags},
3775 [ + + ]: 1575 : m_sock{sock},
3776 : 1575 : m_connected{GetTime<std::chrono::seconds>()},
3777 : 1575 : addr{addrIn},
3778 : 1575 : addrBind{addrBindIn},
3779 [ + + + - : 1575 : m_addr_name{addrNameIn.empty() ? addr.ToStringAddrPort() : addrNameIn},
+ - ]
3780 [ + - ]: 1575 : m_dest(addrNameIn),
3781 : 1575 : m_inbound_onion{inbound_onion},
3782 [ + - ]: 1575 : m_prefer_evict{node_opts.prefer_evict},
3783 : 1575 : nKeyedNetGroup{nKeyedNetGroupIn},
3784 [ + - ]: 1575 : m_conn_type{conn_type_in},
3785 : 1575 : id{idIn},
3786 : 1575 : nLocalHostNonce{nLocalHostNonceIn},
3787 [ + - ]: 1575 : m_recv_flood_size{node_opts.recv_flood_size},
3788 [ + - + - : 3150 : m_i2p_sam_session{std::move(node_opts.i2p_sam_session)}
+ + ]
3789 : : {
3790 [ + + + - ]: 1575 : if (inbound_onion) assert(conn_type_in == ConnectionType::INBOUND);
3791 : :
3792 [ + + ]: 56700 : for (const auto& msg : ALL_NET_MESSAGE_TYPES) {
3793 [ + - ]: 55125 : mapRecvBytesPerMsgType[msg] = 0;
3794 : : }
3795 [ + - ]: 1575 : mapRecvBytesPerMsgType[NET_MESSAGE_TYPE_OTHER] = 0;
3796 : :
3797 [ + + ]: 1575 : if (fLogIPs) {
3798 [ + - + - : 8 : LogDebug(BCLog::NET, "Added connection to %s peer=%d\n", m_addr_name, id);
+ - ]
3799 : : } else {
3800 [ + - + - : 1567 : LogDebug(BCLog::NET, "Added connection peer=%d\n", id);
+ - ]
3801 : : }
3802 [ - - ]: 1575 : }
3803 : :
3804 : 150078 : void CNode::MarkReceivedMsgsForProcessing()
3805 : : {
3806 : 150078 : AssertLockNotHeld(m_msg_process_queue_mutex);
3807 : :
3808 : 150078 : size_t nSizeAdded = 0;
3809 [ + + ]: 311286 : for (const auto& msg : vRecvMsg) {
3810 : : // vRecvMsg contains only completed CNetMessage
3811 : : // the single possible partially deserialized message are held by TransportDeserializer
3812 : 161208 : nSizeAdded += msg.GetMemoryUsage();
3813 : : }
3814 : :
3815 : 150078 : LOCK(m_msg_process_queue_mutex);
3816 : 150078 : m_msg_process_queue.splice(m_msg_process_queue.end(), vRecvMsg);
3817 : 150078 : m_msg_process_queue_size += nSizeAdded;
3818 [ + - ]: 150078 : fPauseRecv = m_msg_process_queue_size > m_recv_flood_size;
3819 : 150078 : }
3820 : :
3821 : 401935 : std::optional<std::pair<CNetMessage, bool>> CNode::PollMessage()
3822 : : {
3823 : 401935 : LOCK(m_msg_process_queue_mutex);
3824 [ + + ]: 401935 : if (m_msg_process_queue.empty()) return std::nullopt;
3825 : :
3826 : 158730 : std::list<CNetMessage> msgs;
3827 : : // Just take one message
3828 : 158730 : msgs.splice(msgs.begin(), m_msg_process_queue, m_msg_process_queue.begin());
3829 : 158730 : m_msg_process_queue_size -= msgs.front().GetMemoryUsage();
3830 : 158730 : fPauseRecv = m_msg_process_queue_size > m_recv_flood_size;
3831 : :
3832 : 317460 : return std::make_pair(std::move(msgs.front()), !m_msg_process_queue.empty());
3833 : 158730 : }
3834 : :
3835 : 81803 : bool CConnman::NodeFullyConnected(const CNode* pnode)
3836 : : {
3837 [ + - + + : 81803 : return pnode && pnode->fSuccessfullyConnected && !pnode->fDisconnect;
+ + ]
3838 : : }
3839 : :
3840 : 166775 : void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg)
3841 : : {
3842 : 166775 : AssertLockNotHeld(m_total_bytes_sent_mutex);
3843 : 166775 : size_t nMessageSize = msg.data.size();
3844 [ + - ]: 166775 : LogDebug(BCLog::NET, "sending %s (%d bytes) peer=%d\n", msg.m_type, nMessageSize, pnode->GetId());
3845 [ + - + + ]: 166775 : if (gArgs.GetBoolArg("-capturemessages", false)) {
3846 : 20 : CaptureMessage(pnode->addr, msg.m_type, msg.data, /*is_incoming=*/false);
3847 : : }
3848 : :
3849 : : TRACEPOINT(net, outbound_message,
3850 : : pnode->GetId(),
3851 : : pnode->m_addr_name.c_str(),
3852 : : pnode->ConnectionTypeAsString().c_str(),
3853 : : msg.m_type.c_str(),
3854 : : msg.data.size(),
3855 : : msg.data.data()
3856 : 166775 : );
3857 : :
3858 : 166775 : size_t nBytesSent = 0;
3859 : 166775 : {
3860 : 166775 : LOCK(pnode->cs_vSend);
3861 : : // Check if the transport still has unsent bytes, and indicate to it that we're about to
3862 : : // give it a message to send.
3863 [ + + ]: 166775 : const auto& [to_send, more, _msg_type] =
3864 [ + + ]: 166775 : pnode->m_transport->GetBytesToSend(/*have_next_message=*/true);
3865 [ + + - + ]: 166775 : const bool queue_was_empty{to_send.empty() && pnode->vSendMsg.empty()};
3866 : :
3867 : : // Update memory usage of send buffer.
3868 : 166775 : pnode->m_send_memusage += msg.GetMemoryUsage();
3869 [ + + ]: 166775 : if (pnode->m_send_memusage + pnode->m_transport->GetSendMemoryUsage() > nSendBufferMaxSize) pnode->fPauseSend = true;
3870 : : // Move message to vSendMsg queue.
3871 [ + - ]: 166775 : pnode->vSendMsg.push_back(std::move(msg));
3872 : :
3873 : : // If there was nothing to send before, and there is now (predicted by the "more" value
3874 : : // returned by the GetBytesToSend call above), attempt "optimistic write":
3875 : : // because the poll/select loop may pause for SELECT_TIMEOUT_MILLISECONDS before actually
3876 : : // doing a send, try sending from the calling thread if the queue was empty before.
3877 : : // With a V1Transport, more will always be true here, because adding a message always
3878 : : // results in sendable bytes there, but with V2Transport this is not the case (it may
3879 : : // still be in the handshake).
3880 [ + + + + ]: 166775 : if (queue_was_empty && more) {
3881 [ + - ]: 166293 : std::tie(nBytesSent, std::ignore) = SocketSendData(*pnode);
3882 : : }
3883 : 166775 : }
3884 [ + + ]: 166775 : if (nBytesSent) RecordBytesSent(nBytesSent);
3885 : 166775 : }
3886 : :
3887 : 417 : bool CConnman::ForNode(NodeId id, std::function<bool(CNode* pnode)> func)
3888 : : {
3889 : 417 : CNode* found = nullptr;
3890 : 417 : LOCK(m_nodes_mutex);
3891 [ + + ]: 707 : for (auto&& pnode : m_nodes) {
3892 [ + + ]: 659 : if(pnode->GetId() == id) {
3893 : : found = pnode;
3894 : : break;
3895 : : }
3896 : : }
3897 [ + + + - : 418 : return found != nullptr && NodeFullyConnected(found) && func(found);
+ - + - +
+ + - ]
3898 : 417 : }
3899 : :
3900 : 4005 : CSipHasher CConnman::GetDeterministicRandomizer(uint64_t id) const
3901 : : {
3902 : 4005 : return CSipHasher(nSeed0, nSeed1).Write(id);
3903 : : }
3904 : :
3905 : 1535 : uint64_t CConnman::CalculateKeyedNetGroup(const CAddress& address) const
3906 : : {
3907 : 1535 : std::vector<unsigned char> vchNetGroup(m_netgroupman.GetGroup(address));
3908 : :
3909 [ + - + - : 1535 : return GetDeterministicRandomizer(RANDOMIZER_ID_NETGROUP).Write(vchNetGroup).Finalize();
+ - ]
3910 : 1535 : }
3911 : :
3912 : 10720 : void CConnman::PerformReconnections()
3913 : : {
3914 : 10720 : AssertLockNotHeld(m_reconnections_mutex);
3915 : 10720 : AssertLockNotHeld(m_unused_i2p_sessions_mutex);
3916 : 10726 : while (true) {
3917 : : // Move first element of m_reconnections to todo (avoiding an allocation inside the lock).
3918 [ + - ]: 10723 : decltype(m_reconnections) todo;
3919 : 10723 : {
3920 [ + - ]: 10723 : LOCK(m_reconnections_mutex);
3921 [ + + ]: 10723 : if (m_reconnections.empty()) break;
3922 [ + - ]: 3 : todo.splice(todo.end(), m_reconnections, m_reconnections.begin());
3923 : 10720 : }
3924 : :
3925 [ + - ]: 3 : auto& item = *todo.begin();
3926 : 6 : OpenNetworkConnection(item.addr_connect,
3927 : : // We only reconnect if the first attempt to connect succeeded at
3928 : : // connection time, but then failed after the CNode object was
3929 : : // created. Since we already know connecting is possible, do not
3930 : : // count failure to reconnect.
3931 : : /*fCountFailure=*/false,
3932 [ + - ]: 3 : std::move(item.grant),
3933 : 3 : item.destination.empty() ? nullptr : item.destination.c_str(),
3934 : : item.conn_type,
3935 [ + - ]: 3 : item.use_v2transport);
3936 : 3 : }
3937 : 10720 : }
3938 : :
3939 : 7 : void CConnman::ASMapHealthCheck()
3940 : : {
3941 : 7 : const std::vector<CAddress> v4_addrs{GetAddresses(/*max_addresses=*/ 0, /*max_pct=*/ 0, Network::NET_IPV4, /*filtered=*/ false)};
3942 [ + - ]: 7 : const std::vector<CAddress> v6_addrs{GetAddresses(/*max_addresses=*/ 0, /*max_pct=*/ 0, Network::NET_IPV6, /*filtered=*/ false)};
3943 : 7 : std::vector<CNetAddr> clearnet_addrs;
3944 [ + - ]: 7 : clearnet_addrs.reserve(v4_addrs.size() + v6_addrs.size());
3945 [ + - ]: 7 : std::transform(v4_addrs.begin(), v4_addrs.end(), std::back_inserter(clearnet_addrs),
3946 [ + - ]: 8 : [](const CAddress& addr) { return static_cast<CNetAddr>(addr); });
3947 [ + - ]: 7 : std::transform(v6_addrs.begin(), v6_addrs.end(), std::back_inserter(clearnet_addrs),
3948 [ # # ]: 0 : [](const CAddress& addr) { return static_cast<CNetAddr>(addr); });
3949 [ + - ]: 7 : m_netgroupman.ASMapHealthCheck(clearnet_addrs);
3950 : 7 : }
3951 : :
3952 : : // Dump binary message to file, with timestamp.
3953 : 22 : static void CaptureMessageToFile(const CAddress& addr,
3954 : : const std::string& msg_type,
3955 : : Span<const unsigned char> data,
3956 : : bool is_incoming)
3957 : : {
3958 : : // Note: This function captures the message at the time of processing,
3959 : : // not at socket receive/send time.
3960 : : // This ensures that the messages are always in order from an application
3961 : : // layer (processing) perspective.
3962 : 22 : auto now = GetTime<std::chrono::microseconds>();
3963 : :
3964 : : // Windows folder names cannot include a colon
3965 : 22 : std::string clean_addr = addr.ToStringAddrPort();
3966 : 22 : std::replace(clean_addr.begin(), clean_addr.end(), ':', '_');
3967 : :
3968 [ + - + - : 132 : fs::path base_path = gArgs.GetDataDirNet() / "message_capture" / fs::u8path(clean_addr);
+ - ]
3969 [ + - ]: 22 : fs::create_directories(base_path);
3970 : :
3971 [ + + + - ]: 66 : fs::path path = base_path / (is_incoming ? "msgs_recv.dat" : "msgs_sent.dat");
3972 [ + - + - ]: 22 : AutoFile f{fsbridge::fopen(path, "ab")};
3973 : :
3974 [ + - ]: 22 : ser_writedata64(f, now.count());
3975 [ + - ]: 22 : f << Span{msg_type};
3976 [ + + ]: 129 : for (auto i = msg_type.length(); i < CMessageHeader::MESSAGE_TYPE_SIZE; ++i) {
3977 [ + - ]: 214 : f << uint8_t{'\0'};
3978 : : }
3979 [ + - ]: 22 : uint32_t size = data.size();
3980 [ + - ]: 22 : ser_writedata32(f, size);
3981 [ + - ]: 44 : f << data;
3982 : 66 : }
3983 : :
3984 : : std::function<void(const CAddress& addr,
3985 : : const std::string& msg_type,
3986 : : Span<const unsigned char> data,
3987 : : bool is_incoming)>
3988 : : CaptureMessage = CaptureMessageToFile;
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