![simon@bitcartel.com](/assets/img/avatar_default.png)
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/*
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So you need to broadcast an alert... |
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... here's what to do: |
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1. Copy sendalert.cpp into your bitcoind build directory |
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2. Decrypt the alert keys |
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copy the decrypted file as alertkeys.h into the src/ directory. |
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3. Modify the alert parameters in sendalert.cpp |
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See the comments in the code for what does what. |
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4. Add sendalert.cpp to the src/Makefile.am so it gets built: |
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libbitcoin_server_a_SOURCES = \ |
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sendalert.cpp \ |
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... etc |
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5. Update init.cpp to launch the send alert thread. |
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Define the thread function as external at the top of init.cpp: |
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extern void ThreadSendAlert(); |
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Add this call at the end of AppInit2: |
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threadGroup.create_thread(boost::bind(ThreadSendAlert)); |
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6. build bitcoind, then run it with -printalert or -sendalert |
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I usually run it like this: |
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./bitcoind -printtoconsole -sendalert |
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One minute after starting up the alert will be broadcast. It is then |
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flooded through the network until the nRelayUntil time, and will be |
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active until nExpiration OR the alert is cancelled. |
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If you screw up something, send another alert with nCancel set to cancel |
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the bad alert. |
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*/ |
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#include "main.h" |
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#include "net.h" |
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#include "alert.h" |
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#include "init.h" |
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static const int64_t DAYS = 24 * 60 * 60; |
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void ThreadSendAlert() |
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{ |
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MilliSleep(60*1000); // Wait a minute so we get connected
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if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert")) |
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return; |
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//
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// Alerts are relayed around the network until nRelayUntil, flood
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// filling to every node.
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// After the relay time is past, new nodes are told about alerts
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// when they connect to peers, until either nExpiration or
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// the alert is cancelled by a newer alert.
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// Nodes never save alerts to disk, they are in-memory-only.
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//
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CAlert alert; |
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alert.nRelayUntil = GetTime() + 15 * 60; |
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alert.nExpiration = GetTime() + 365 * 60 * 60; |
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alert.nID = 1040; // use https://en.bitcoin.it/wiki/Alerts to keep track of alert IDs
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alert.nCancel = 0; // cancels previous messages up to this ID number
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// These versions are protocol versions
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// 60002 : 0.7.*
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// 70001 : 0.8.*
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// 70002 : 0.9.*
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alert.nMinVer = 70002; |
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alert.nMaxVer = 70002; |
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//
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// main.cpp:
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// 1000 for Misc warnings like out of disk space and clock is wrong
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// 2000 for longer invalid proof-of-work chain
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// Higher numbers mean higher priority
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alert.nPriority = 5000; |
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alert.strComment = ""; |
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alert.strStatusBar = "URGENT: Upgrade required: see https://www.bitcoin.org/heartbleed"; |
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// Set specific client version/versions here. If setSubVer is empty, no filtering on subver is done:
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// alert.setSubVer.insert(std::string("/Satoshi:0.7.2/"));
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// Sign
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#include "alertkeys.h" |
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std::vector<unsigned char> vchTmp(ParseHex(TestNet() ? pszTestNetPrivKey : pszPrivKey)); |
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CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end()); |
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CDataStream sMsg(SER_NETWORK, CLIENT_VERSION); |
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sMsg << *(CUnsignedAlert*)&alert; |
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alert.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end()); |
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CKey key; |
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if (!key.SetPrivKey(vchPrivKey, false)) |
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{ |
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printf("ThreadSendAlert() : key.SetPrivKey failed\n"); |
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return; |
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} |
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if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig)) |
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{ |
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printf("ThreadSendAlert() : key.Sign failed\n"); |
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return; |
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} |
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// Test
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CDataStream sBuffer(SER_NETWORK, CLIENT_VERSION); |
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sBuffer << alert; |
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CAlert alert2; |
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sBuffer >> alert2; |
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if (!alert2.CheckSignature()) |
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{ |
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printf("ThreadSendAlert() : CheckSignature failed\n"); |
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return; |
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} |
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assert(alert2.vchMsg == alert.vchMsg); |
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assert(alert2.vchSig == alert.vchSig); |
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alert.SetNull(); |
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printf("\nThreadSendAlert:\n"); |
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printf("hash=%s\n", alert2.GetHash().ToString().c_str()); |
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alert2.print(); |
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printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str()); |
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printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str()); |
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// Confirm
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if (!mapArgs.count("-sendalert")) |
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return; |
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while (vNodes.size() < 1 && !ShutdownRequested()) |
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MilliSleep(500); |
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if (ShutdownRequested()) |
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return; |
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#ifdef QT_GUI |
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if (ThreadSafeMessageBox("Send alert?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES) |
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return; |
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if (ThreadSafeMessageBox("Send alert, are you sure?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES) |
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{ |
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ThreadSafeMessageBox("Nothing sent", "ThreadSendAlert", wxOK); |
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return; |
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} |
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#endif |
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// Send
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printf("ThreadSendAlert() : Sending alert\n"); |
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int nSent = 0; |
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{ |
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LOCK(cs_vNodes); |
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BOOST_FOREACH(CNode* pnode, vNodes) |
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{ |
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if (alert2.RelayTo(pnode)) |
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{ |
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printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str()); |
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nSent++; |
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} |
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} |
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} |
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printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent); |
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} |
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