sendalert.cpp

sendalert.cpp

// *** CONFIDENTIAL - NOT FOR RELEASE ***
#include "main.h"
#include "net.h"
#include "alert.h"
#include "init.h"

static const int64_t DAYS = 24 * 60 * 60;

void ThreadSendAlert()
{
    MilliSleep(60*1000); // Wait a minute so we get connected
    if (!mapArgs.count("-sendalert") && !mapArgs.count("-printalert"))
        return;

    //
    // Alerts are relayed around the network until nRelayUntil, flood
    // filling to every node.
    // After the relay time is past, new nodes are told about alerts
    // when they connect to peers, until either nExpiration or
    // the alert is cancelled by a newer alert.
    // Nodes never save alerts to disk, they are in-memory-only.
    //
    CAlert alert;
    alert.nRelayUntil   = GetTime() + 15 * 60;
    alert.nExpiration   = GetTime() + 365 * 60 * 60;
    alert.nID           = 1040;  // use https://en.bitcoin.it/wiki/Alerts to keep track of alert IDs
    alert.nCancel       = 0;   // cancels previous messages up to this ID number

    // These versions are protocol versions
    // 60002 : 0.7.*
    // 70001 : 0.8.*
    // 70002 : 0.9.*
    alert.nMinVer       = 70002;
    alert.nMaxVer       = 70002;

    //
    // main.cpp: 
    //  1000 for Misc warnings like out of disk space and clock is wrong
    //  2000 for longer invalid proof-of-work chain 
    //  Higher numbers mean higher priority
    alert.nPriority     = 5000;
    alert.strComment    = "";
    alert.strStatusBar  = "URGENT: Upgrade required: see https://www.bitcoin.org/heartbleed/";

    // Set specific client version/versions here. If setSubVer is empty, no filtering on subver is done:
    // alert.setSubVer.insert(std::string("/Satoshi:0.7.2/"));

    // Sign
#include "alertkeys.h"

    std::vector<unsigned char> vchTmp(ParseHex(TestNet() ? pszTestNetPrivKey : pszPrivKey));
    CPrivKey vchPrivKey(vchTmp.begin(), vchTmp.end());

    CDataStream sMsg(SER_NETWORK, CLIENT_VERSION);
    sMsg << *(CUnsignedAlert*)&alert;
    alert.vchMsg = std::vector<unsigned char>(sMsg.begin(), sMsg.end());
    CKey key;
    if (!key.SetPrivKey(vchPrivKey, false))
    {
        printf("ThreadSendAlert() : key.SetPrivKey failed\n");
        return;
    }
    if (!key.Sign(Hash(alert.vchMsg.begin(), alert.vchMsg.end()), alert.vchSig))
    {
        printf("ThreadSendAlert() : key.Sign failed\n");
        return;
    }

    // Test
    CDataStream sBuffer(SER_NETWORK, CLIENT_VERSION);
    sBuffer << alert;
    CAlert alert2;
    sBuffer >> alert2;
    if (!alert2.CheckSignature())
    {
        printf("ThreadSendAlert() : CheckSignature failed\n");
        return;
    }
    assert(alert2.vchMsg == alert.vchMsg);
    assert(alert2.vchSig == alert.vchSig);
    alert.SetNull();
    printf("\nThreadSendAlert:\n");
    printf("hash=%s\n", alert2.GetHash().ToString().c_str());
    alert2.print();
    printf("vchMsg=%s\n", HexStr(alert2.vchMsg).c_str());
    printf("vchSig=%s\n", HexStr(alert2.vchSig).c_str());

    // Confirm
    if (!mapArgs.count("-sendalert"))
        return;
    while (vNodes.size() < 1 && !ShutdownRequested())
        MilliSleep(500);
    if (ShutdownRequested())
        return;
#ifdef QT_GUI
    if (ThreadSafeMessageBox("Send alert?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES)
        return;
    if (ThreadSafeMessageBox("Send alert, are you sure?", "ThreadSendAlert", wxYES_NO | wxNO_DEFAULT) != wxYES)
    {
        ThreadSafeMessageBox("Nothing sent", "ThreadSendAlert", wxOK);
        return;
    }
#endif

    // Send
    printf("ThreadSendAlert() : Sending alert\n");
    int nSent = 0;
    {
        LOCK(cs_vNodes);
        BOOST_FOREACH(CNode* pnode, vNodes)
        {
            if (alert2.RelayTo(pnode))
            {
                printf("ThreadSendAlert() : Sent alert to %s\n", pnode->addr.ToString().c_str());
                nSent++;
            }
        }
    }
    printf("ThreadSendAlert() : Alert sent to %d nodes\n", nSent);
}