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323 lines
8.3 KiB
323 lines
8.3 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
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// Distributed under the MIT/X11 software license, see the accompanying |
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// file license.txt or http://www.opensource.org/licenses/mit-license.php. |
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#include "headers.h" |
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int nGotIRCAddresses = 0; |
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#pragma pack(push, 1) |
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struct ircaddr |
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{ |
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int ip; |
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short port; |
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}; |
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#pragma pack(pop) |
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string EncodeAddress(const CAddress& addr) |
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{ |
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struct ircaddr tmp; |
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tmp.ip = addr.ip; |
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tmp.port = addr.port; |
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vector<unsigned char> vch(UBEGIN(tmp), UEND(tmp)); |
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return string("u") + EncodeBase58Check(vch); |
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} |
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bool DecodeAddress(string str, CAddress& addr) |
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{ |
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vector<unsigned char> vch; |
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if (!DecodeBase58Check(str.substr(1), vch)) |
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return false; |
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struct ircaddr tmp; |
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if (vch.size() != sizeof(tmp)) |
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return false; |
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memcpy(&tmp, &vch[0], sizeof(tmp)); |
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addr = CAddress(tmp.ip, tmp.port, NODE_NETWORK); |
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return true; |
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} |
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static bool Send(SOCKET hSocket, const char* pszSend) |
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{ |
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if (strstr(pszSend, "PONG") != pszSend) |
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printf("IRC SENDING: %s\n", pszSend); |
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const char* psz = pszSend; |
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const char* pszEnd = psz + strlen(psz); |
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while (psz < pszEnd) |
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{ |
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int ret = send(hSocket, psz, pszEnd - psz, MSG_NOSIGNAL); |
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if (ret < 0) |
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return false; |
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psz += ret; |
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} |
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return true; |
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} |
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bool RecvLine(SOCKET hSocket, string& strLine) |
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{ |
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strLine = ""; |
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loop |
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{ |
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char c; |
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int nBytes = recv(hSocket, &c, 1, 0); |
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if (nBytes > 0) |
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{ |
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if (c == '\n') |
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continue; |
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if (c == '\r') |
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return true; |
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strLine += c; |
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if (strLine.size() >= 9000) |
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return true; |
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} |
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else if (nBytes <= 0) |
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{ |
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if (!strLine.empty()) |
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return true; |
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// socket closed |
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printf("IRC socket closed\n"); |
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return false; |
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} |
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else |
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{ |
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// socket error |
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int nErr = WSAGetLastError(); |
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if (nErr != WSAEMSGSIZE && nErr != WSAEINTR && nErr != WSAEINPROGRESS) |
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{ |
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printf("IRC recv failed: %d\n", nErr); |
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return false; |
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} |
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} |
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} |
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} |
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bool RecvLineIRC(SOCKET hSocket, string& strLine) |
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{ |
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loop |
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{ |
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bool fRet = RecvLine(hSocket, strLine); |
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if (fRet) |
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{ |
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if (fShutdown) |
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return false; |
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vector<string> vWords; |
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ParseString(strLine, ' ', vWords); |
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if (vWords.size() >= 1 && vWords[0] == "PING") |
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{ |
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strLine[1] = 'O'; |
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strLine += '\r'; |
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Send(hSocket, strLine.c_str()); |
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continue; |
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} |
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} |
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return fRet; |
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} |
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} |
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int RecvUntil(SOCKET hSocket, const char* psz1, const char* psz2=NULL, const char* psz3=NULL) |
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{ |
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loop |
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{ |
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string strLine; |
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if (!RecvLineIRC(hSocket, strLine)) |
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return 0; |
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printf("IRC %s\n", strLine.c_str()); |
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if (psz1 && strLine.find(psz1) != -1) |
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return 1; |
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if (psz2 && strLine.find(psz2) != -1) |
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return 2; |
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if (psz3 && strLine.find(psz3) != -1) |
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return 3; |
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} |
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} |
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bool Wait(int nSeconds) |
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{ |
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if (fShutdown) |
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return false; |
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printf("IRC waiting %d seconds to reconnect\n", nSeconds); |
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for (int i = 0; i < nSeconds; i++) |
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{ |
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if (fShutdown) |
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return false; |
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Sleep(1000); |
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} |
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return true; |
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} |
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void ThreadIRCSeed(void* parg) |
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{ |
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printf("ThreadIRCSeed started\n"); |
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int nErrorWait = 10; |
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int nRetryWait = 10; |
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bool fNameInUse = false; |
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bool fTOR = (fUseProxy && addrProxy.port == htons(9050)); |
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while (!fShutdown) |
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{ |
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CAddress addrConnect("216.155.130.130:6667"); |
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if (!fTOR) |
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{ |
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struct hostent* phostent = gethostbyname("chat.freenode.net"); |
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if (phostent && phostent->h_addr_list && phostent->h_addr_list[0]) |
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addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(6667)); |
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} |
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SOCKET hSocket; |
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if (!ConnectSocket(addrConnect, hSocket)) |
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{ |
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printf("IRC connect failed\n"); |
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nErrorWait = nErrorWait * 11 / 10; |
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if (Wait(nErrorWait += 60)) |
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continue; |
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else |
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return; |
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} |
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if (!RecvUntil(hSocket, "Found your hostname", "using your IP address instead", "Couldn't look up your hostname")) |
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{ |
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closesocket(hSocket); |
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hSocket = INVALID_SOCKET; |
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nErrorWait = nErrorWait * 11 / 10; |
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if (Wait(nErrorWait += 60)) |
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continue; |
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else |
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return; |
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} |
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string strMyName; |
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if (addrLocalHost.IsRoutable() && !fUseProxy && !fNameInUse) |
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strMyName = EncodeAddress(addrLocalHost); |
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else |
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strMyName = strprintf("x%u", GetRand(1000000000)); |
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Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str()); |
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Send(hSocket, strprintf("USER %s 8 * : %s\r", strMyName.c_str(), strMyName.c_str()).c_str()); |
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int nRet = RecvUntil(hSocket, " 004 ", " 433 "); |
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if (nRet != 1) |
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{ |
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closesocket(hSocket); |
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hSocket = INVALID_SOCKET; |
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if (nRet == 2) |
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{ |
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printf("IRC name already in use\n"); |
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fNameInUse = true; |
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Wait(10); |
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continue; |
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} |
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nErrorWait = nErrorWait * 11 / 10; |
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if (Wait(nErrorWait += 60)) |
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continue; |
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else |
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return; |
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} |
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Sleep(500); |
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Send(hSocket, "JOIN #bitcoin\r"); |
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Send(hSocket, "WHO #bitcoin\r"); |
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int64 nStart = GetTime(); |
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string strLine; |
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while (!fShutdown && RecvLineIRC(hSocket, strLine)) |
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{ |
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if (strLine.empty() || strLine.size() > 900 || strLine[0] != ':') |
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continue; |
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vector<string> vWords; |
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ParseString(strLine, ' ', vWords); |
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if (vWords.size() < 2) |
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continue; |
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char pszName[10000]; |
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pszName[0] = '\0'; |
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if (vWords[1] == "352" && vWords.size() >= 8) |
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{ |
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// index 7 is limited to 16 characters |
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// could get full length name at index 10, but would be different from join messages |
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strlcpy(pszName, vWords[7].c_str(), sizeof(pszName)); |
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printf("IRC got who\n"); |
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} |
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if (vWords[1] == "JOIN" && vWords[0].size() > 1) |
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{ |
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// :username!username@50000007.F000000B.90000002.IP JOIN :#channelname |
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strlcpy(pszName, vWords[0].c_str() + 1, sizeof(pszName)); |
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if (strchr(pszName, '!')) |
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*strchr(pszName, '!') = '\0'; |
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printf("IRC got join\n"); |
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} |
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if (pszName[0] == 'u') |
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{ |
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CAddress addr; |
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if (DecodeAddress(pszName, addr)) |
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{ |
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addr.nTime = GetAdjustedTime() - 51 * 60; |
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if (AddAddress(addr)) |
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printf("IRC got new address\n"); |
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nGotIRCAddresses++; |
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} |
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else |
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{ |
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printf("IRC decode failed\n"); |
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} |
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} |
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} |
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closesocket(hSocket); |
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hSocket = INVALID_SOCKET; |
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// IRC usually blocks TOR, so only try once |
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if (fTOR) |
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return; |
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if (GetTime() - nStart > 20 * 60) |
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{ |
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nErrorWait /= 3; |
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nRetryWait /= 3; |
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} |
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nRetryWait = nRetryWait * 11 / 10; |
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if (!Wait(nRetryWait += 60)) |
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return; |
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} |
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} |
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#ifdef TEST |
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int main(int argc, char *argv[]) |
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{ |
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WSADATA wsadata; |
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if (WSAStartup(MAKEWORD(2,2), &wsadata) != NO_ERROR) |
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{ |
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printf("Error at WSAStartup()\n"); |
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return false; |
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} |
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ThreadIRCSeed(NULL); |
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WSACleanup(); |
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return 0; |
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} |
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#endif
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