directory re-organization (keeps the old build system)

there is no internal modification of any file in this commit

files are moved into directories according to established standards in
sourcecode distribution; these directories contain:

 src - Files that are used in constructing the executable binaries,
       but are not installed.

 doc - Files in HTML and text format that document usage, quirks of
       the implementation, and contributor checklists.

 locale - Files that contain human language translation of strings
          used in the program

 contrib - Files contributed from distributions or other third party
 	   implementing scripts and auxiliary programs

src/irc.cpp

@@ -0,0 +1,445 @@
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+#include "headers.h"
+
+int nGotIRCAddresses = 0;
+bool fGotExternalIP = false;
+
+void ThreadIRCSeed2(void* parg);
+
+
+
+
+#pragma pack(push, 1)
+struct ircaddr
+{
+    int ip;
+    short port;
+};
+#pragma pack(pop)
+
+string EncodeAddress(const CAddress& addr)
+{
+    struct ircaddr tmp;
+    tmp.ip    = addr.ip;
+    tmp.port  = addr.port;
+
+    vector<unsigned char> vch(UBEGIN(tmp), UEND(tmp));
+    return string("u") + EncodeBase58Check(vch);
+}
+
+bool DecodeAddress(string str, CAddress& addr)
+{
+    vector<unsigned char> vch;
+    if (!DecodeBase58Check(str.substr(1), vch))
+        return false;
+
+    struct ircaddr tmp;
+    if (vch.size() != sizeof(tmp))
+        return false;
+    memcpy(&tmp, &vch[0], sizeof(tmp));
+
+    addr = CAddress(tmp.ip, tmp.port, NODE_NETWORK);
+    return true;
+}
+
+
+
+
+
+
+static bool Send(SOCKET hSocket, const char* pszSend)
+{
+    if (strstr(pszSend, "PONG") != pszSend)
+        printf("IRC SENDING: %s\n", pszSend);
+    const char* psz = pszSend;
+    const char* pszEnd = psz + strlen(psz);
+    while (psz < pszEnd)
+    {
+        int ret = send(hSocket, psz, pszEnd - psz, MSG_NOSIGNAL);
+        if (ret < 0)
+            return false;
+        psz += ret;
+    }
+    return true;
+}
+
+bool RecvLine(SOCKET hSocket, string& strLine)
+{
+    strLine = "";
+    loop
+    {
+        char c;
+        int nBytes = recv(hSocket, &c, 1, 0);
+        if (nBytes > 0)
+        {
+            if (c == '\n')
+                continue;
+            if (c == '\r')
+                return true;
+            strLine += c;
+            if (strLine.size() >= 9000)
+                return true;
+        }
+        else if (nBytes <= 0)
+        {
+            if (fShutdown)
+                return false;
+            if (nBytes < 0)
+            {
+                int nErr = WSAGetLastError();
+                if (nErr == WSAEMSGSIZE)
+                    continue;
+                if (nErr == WSAEWOULDBLOCK || nErr == WSAEINTR || nErr == WSAEINPROGRESS)
+                {
+                    Sleep(10);
+                    continue;
+                }
+            }
+            if (!strLine.empty())
+                return true;
+            if (nBytes == 0)
+            {
+                // socket closed
+                printf("IRC socket closed\n");
+                return false;
+            }
+            else
+            {
+                // socket error
+                int nErr = WSAGetLastError();
+                printf("IRC recv failed: %d\n", nErr);
+                return false;
+            }
+        }
+    }
+}
+
+bool RecvLineIRC(SOCKET hSocket, string& strLine)
+{
+    loop
+    {
+        bool fRet = RecvLine(hSocket, strLine);
+        if (fRet)
+        {
+            if (fShutdown)
+                return false;
+            vector<string> vWords;
+            ParseString(strLine, ' ', vWords);
+            if (vWords.size() >= 1 && vWords[0] == "PING")
+            {
+                strLine[1] = 'O';
+                strLine += '\r';
+                Send(hSocket, strLine.c_str());
+                continue;
+            }
+        }
+        return fRet;
+    }
+}
+
+int RecvUntil(SOCKET hSocket, const char* psz1, const char* psz2=NULL, const char* psz3=NULL, const char* psz4=NULL)
+{
+    loop
+    {
+        string strLine;
+        strLine.reserve(10000);
+        if (!RecvLineIRC(hSocket, strLine))
+            return 0;
+        printf("IRC %s\n", strLine.c_str());
+        if (psz1 && strLine.find(psz1) != -1)
+            return 1;
+        if (psz2 && strLine.find(psz2) != -1)
+            return 2;
+        if (psz3 && strLine.find(psz3) != -1)
+            return 3;
+        if (psz4 && strLine.find(psz4) != -1)
+            return 4;
+    }
+}
+
+bool Wait(int nSeconds)
+{
+    if (fShutdown)
+        return false;
+    printf("IRC waiting %d seconds to reconnect\n", nSeconds);
+    for (int i = 0; i < nSeconds; i++)
+    {
+        if (fShutdown)
+            return false;
+        Sleep(1000);
+    }
+    return true;
+}
+
+bool RecvCodeLine(SOCKET hSocket, const char* psz1, string& strRet)
+{
+    strRet.clear();
+    loop
+    {
+        string strLine;
+        if (!RecvLineIRC(hSocket, strLine))
+            return false;
+
+        vector<string> vWords;
+        ParseString(strLine, ' ', vWords);
+        if (vWords.size() < 2)
+            continue;
+
+        if (vWords[1] == psz1)
+        {
+            printf("IRC %s\n", strLine.c_str());
+            strRet = strLine;
+            return true;
+        }
+    }
+}
+
+bool GetIPFromIRC(SOCKET hSocket, string strMyName, unsigned int& ipRet)
+{
+    Send(hSocket, strprintf("USERHOST %s\r", strMyName.c_str()).c_str());
+
+    string strLine;
+    if (!RecvCodeLine(hSocket, "302", strLine))
+        return false;
+
+    vector<string> vWords;
+    ParseString(strLine, ' ', vWords);
+    if (vWords.size() < 4)
+        return false;
+
+    string str = vWords[3];
+    if (str.rfind("@") == string::npos)
+        return false;
+    string strHost = str.substr(str.rfind("@")+1);
+
+    unsigned int a=0, b=0, c=0, d=0;
+    if (sscanf(strHost.c_str(), "%u.%u.%u.%u", &a, &b, &c, &d) == 4 &&
+        inet_addr(strHost.c_str()) != INADDR_NONE)
+    {
+        printf("GetIPFromIRC() userhost is IP %s\n", strHost.c_str());
+        ipRet = CAddress(strHost).ip;
+    }
+    else
+    {
+        // Hybrid IRC used by lfnet always returns IP when you userhost yourself,
+        // but in case another IRC is ever used this should work.
+        printf("GetIPFromIRC() got userhost %s\n", strHost.c_str());
+        if (fUseProxy)
+            return false;
+        struct hostent* phostent = gethostbyname(strHost.c_str());
+        if (!phostent || !phostent->h_addr_list || !phostent->h_addr_list[0])
+            return false;
+        ipRet = *(u_long*)phostent->h_addr_list[0];
+    }
+
+    return true;
+}
+
+
+
+void ThreadIRCSeed(void* parg)
+{
+    IMPLEMENT_RANDOMIZE_STACK(ThreadIRCSeed(parg));
+    try
+    {
+        ThreadIRCSeed2(parg);
+    }
+    catch (std::exception& e) {
+        PrintExceptionContinue(&e, "ThreadIRCSeed()");
+    } catch (...) {
+        PrintExceptionContinue(NULL, "ThreadIRCSeed()");
+    }
+    printf("ThreadIRCSeed exiting\n");
+}
+
+void ThreadIRCSeed2(void* parg)
+{
+    /* Dont advertise on IRC if we don't allow incoming connections */
+    if (mapArgs.count("-connect") || fNoListen)
+        return;
+
+    if (GetBoolArg("-noirc"))
+        return;
+    printf("ThreadIRCSeed started\n");
+    int nErrorWait = 10;
+    int nRetryWait = 10;
+    bool fNameInUse = false;
+    bool fTOR = (fUseProxy && addrProxy.port == htons(9050));
+
+    while (!fShutdown)
+    {
+        //CAddress addrConnect("216.155.130.130:6667"); // chat.freenode.net
+        CAddress addrConnect("92.243.23.21:6667"); // irc.lfnet.org
+        if (!fTOR)
+        {
+            //struct hostent* phostent = gethostbyname("chat.freenode.net");
+            struct hostent* phostent = gethostbyname("irc.lfnet.org");
+            if (phostent && phostent->h_addr_list && phostent->h_addr_list[0])
+                addrConnect = CAddress(*(u_long*)phostent->h_addr_list[0], htons(6667));
+        }
+
+        SOCKET hSocket;
+        if (!ConnectSocket(addrConnect, hSocket))
+        {
+            printf("IRC connect failed\n");
+            nErrorWait = nErrorWait * 11 / 10;
+            if (Wait(nErrorWait += 60))
+                continue;
+            else
+                return;
+        }
+
+        if (!RecvUntil(hSocket, "Found your hostname", "using your IP address instead", "Couldn't look up your hostname", "ignoring hostname"))
+        {
+            closesocket(hSocket);
+            hSocket = INVALID_SOCKET;
+            nErrorWait = nErrorWait * 11 / 10;
+            if (Wait(nErrorWait += 60))
+                continue;
+            else
+                return;
+        }
+
+        string strMyName;
+        if (addrLocalHost.IsRoutable() && !fUseProxy && !fNameInUse)
+            strMyName = EncodeAddress(addrLocalHost);
+        else
+            strMyName = strprintf("x%u", GetRand(1000000000));
+
+        Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
+        Send(hSocket, strprintf("USER %s 8 * : %s\r", strMyName.c_str(), strMyName.c_str()).c_str());
+
+        int nRet = RecvUntil(hSocket, " 004 ", " 433 ");
+        if (nRet != 1)
+        {
+            closesocket(hSocket);
+            hSocket = INVALID_SOCKET;
+            if (nRet == 2)
+            {
+                printf("IRC name already in use\n");
+                fNameInUse = true;
+                Wait(10);
+                continue;
+            }
+            nErrorWait = nErrorWait * 11 / 10;
+            if (Wait(nErrorWait += 60))
+                continue;
+            else
+                return;
+        }
+        Sleep(500);
+
+        // Get our external IP from the IRC server and re-nick before joining the channel
+        CAddress addrFromIRC;
+        if (GetIPFromIRC(hSocket, strMyName, addrFromIRC.ip))
+        {
+            printf("GetIPFromIRC() returned %s\n", addrFromIRC.ToStringIP().c_str());
+            if (!fUseProxy && addrFromIRC.IsRoutable())
+            {
+                // IRC lets you to re-nick
+                fGotExternalIP = true;
+                addrLocalHost.ip = addrFromIRC.ip;
+                strMyName = EncodeAddress(addrLocalHost);
+                Send(hSocket, strprintf("NICK %s\r", strMyName.c_str()).c_str());
+            }
+        }
+
+        Send(hSocket, fTestNet ? "JOIN #bitcoinTEST\r" : "JOIN #bitcoin\r");
+        Send(hSocket, fTestNet ? "WHO #bitcoinTEST\r"  : "WHO #bitcoin\r");
+
+        int64 nStart = GetTime();
+        string strLine;
+        strLine.reserve(10000);
+        while (!fShutdown && RecvLineIRC(hSocket, strLine))
+        {
+            if (strLine.empty() || strLine.size() > 900 || strLine[0] != ':')
+                continue;
+
+            vector<string> vWords;
+            ParseString(strLine, ' ', vWords);
+            if (vWords.size() < 2)
+                continue;
+
+            char pszName[10000];
+            pszName[0] = '\0';
+
+            if (vWords[1] == "352" && vWords.size() >= 8)
+            {
+                // index 7 is limited to 16 characters
+                // could get full length name at index 10, but would be different from join messages
+                strlcpy(pszName, vWords[7].c_str(), sizeof(pszName));
+                printf("IRC got who\n");
+            }
+
+            if (vWords[1] == "JOIN" && vWords[0].size() > 1)
+            {
+                // :username!username@50000007.F000000B.90000002.IP JOIN :#channelname
+                strlcpy(pszName, vWords[0].c_str() + 1, sizeof(pszName));
+                if (strchr(pszName, '!'))
+                    *strchr(pszName, '!') = '\0';
+                printf("IRC got join\n");
+            }
+
+            if (pszName[0] == 'u')
+            {
+                CAddress addr;
+                if (DecodeAddress(pszName, addr))
+                {
+                    addr.nTime = GetAdjustedTime();
+                    if (AddAddress(addr, 51 * 60))
+                        printf("IRC got new address\n");
+                    nGotIRCAddresses++;
+                }
+                else
+                {
+                    printf("IRC decode failed\n");
+                }
+            }
+        }
+        closesocket(hSocket);
+        hSocket = INVALID_SOCKET;
+
+        // IRC usually blocks TOR, so only try once
+        if (fTOR)
+            return;
+
+        if (GetTime() - nStart > 20 * 60)
+        {
+            nErrorWait /= 3;
+            nRetryWait /= 3;
+        }
+
+        nRetryWait = nRetryWait * 11 / 10;
+        if (!Wait(nRetryWait += 60))
+            return;
+    }
+}
+
+
+
+
+
+
+
+
+
+
+#ifdef TEST
+int main(int argc, char *argv[])
+{
+    WSADATA wsadata;
+    if (WSAStartup(MAKEWORD(2,2), &wsadata) != NO_ERROR)
+    {
+        printf("Error at WSAStartup()\n");
+        return false;
+    }
+
+    ThreadIRCSeed(NULL);
+
+    WSACleanup();
+    return 0;
+}
+#endif