src/connection.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <connection.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <poll.h>
  23 #include <sys/errno.h>
  24 #include <sys/ioctl.h>
  25 #include <sys/utsname.h>
  26 #include <vector>
  27 #include <string>
  28 #include <deque>
  29 #include <sstream>
  30 #include "inspircd.h"
  31 #include "modules.h"
  32 #include "inspstring.h"
  33 #include "helperfuncs.h"
  34
  35
  36 extern std::vector<Module*> modules;
  37 extern std::vector<ircd_module*> factory;
  38
  39 extern int MODCOUNT;
  40
  41 extern time_t TIME;
  42
  43
  44 /**
  45  * The InspIRCd mesh network is maintained by a tree of objects which reference *themselves*.
  46  * Every local server has an array of 32 *serverrecs, known as me[]. Each of these represents
  47  * a local listening port, and is not null if the user has opened a listening port on the server.
  48  * It is assumed nobody will ever want to open more than 32 listening server ports at any one
  49  * time (i mean come on, why would you want more, the ircd works fine with ONE).
  50  * Each me[] entry has multiple classes within it of type ircd_connector. These are stored in a vector
  51  * and each represents a server linked via this socket. If the connection was created outbound,
  52  * the connection is bound to the default ip address by using me[defaultRoute] (defaultRoute being
  53  * a global variable which indicates the default server to make connections on). If the connection
  54  * was created inbound, it is attached to the port the connection came in on. There may be as many
  55  * ircd_connector objects as needed in each me[] entry. Each ircd_connector implements the specifics
  56  * of an ircd connection in the mesh, however each ircd may have multiple ircd_connector connections
  57  * to it, to maintain the mesh link.
  58  */
  59
  60 char* xsumtable = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
  61
  62 // creates a random id for a line for detection of duplicate messages
  63 std::string CreateSum()
  64 {
  65         char sum[9];
  66         sum[0] = ':';
  67         sum[8] = '\0';
  68         for(int q = 1; q < 8; q++)
  69                 sum[q] = xsumtable[rand()%52];
  70         return sum;
  71 }
  72
  73 connection::connection()
  74 {
  75         fd = -1;
  76 }
  77
  78
  79 ircd_connector::ircd_connector()
  80 {
  81         fd = -1;
  82         port = 0;
  83         sendq = "";
  84         WriteError = "";
  85 }
  86
  87 char* ircd_connector::GetServerIP()
  88 {
  89         return this->host;
  90 }
  91
  92 int ircd_connector::GetServerPort()
  93 {
  94         return this->port;
  95 }
  96
  97 bool ircd_connector::SetHostAndPort(char* newhost, int newport)
  98 {
  99         strncpy(this->host,newhost,160);
 100         this->port = newport;
 101         return true;
 102 }
 103
 104 bool ircd_connector::SetHostAddress(char* newhost, int newport)
 105 {
 106         strncpy(this->host,newhost,160);
 107         this->port = newport;
 108         memset((void*)&addr, 0, sizeof(addr));
 109         addr.sin_family = AF_INET;
 110         inet_aton(host,&addr.sin_addr);
 111         addr.sin_port = htons(port);
 112         return true;
 113 }
 114
 115 void ircd_connector::SetServerPort(int p)
 116 {
 117         this->port = p;
 118 }
 119
 120 void ircd_connector::AddBuffer(std::string a)
 121 {
 122         std::string b = "";
 123         for (int i = 0; i < a.length(); i++)
 124                 if (a[i] != '\r')
 125                         b = b + a[i];
 126
 127         std::stringstream stream(ircdbuffer);
 128         stream << b;
 129         log(DEBUG,"AddBuffer: %s",b.c_str());
 130         ircdbuffer = stream.str();
 131 }
 132
 133 bool ircd_connector::BufferIsComplete()
 134 {
 135         for (int i = 0; i < ircdbuffer.length(); i++)
 136                 if (ircdbuffer[i] == '\n')
 137                         return true;
 138         return false;
 139 }
 140
 141 void ircd_connector::ClearBuffer()
 142 {
 143         ircdbuffer = "";
 144 }
 145
 146 std::string ircd_connector::GetBuffer()
 147 {
 148         // Fix by Brain 28th Apr 2005
 149         // seems my stringstream code isnt liked by linux
 150         // EVEN THOUGH IT IS CORRECT! Fixed by using a different
 151         // (SLOWER) algorithm...
 152         char* line = (char*)ircdbuffer.c_str();
 153         std::string ret = "";
 154         while ((*line != '\n') && (strlen(line)))
 155         {
 156                 ret = ret + *line;
 157                 line++;
 158         }
 159         if ((*line == '\n') || (*line == '\r'))
 160                 line++;
 161         ircdbuffer = line;
 162         return ret;
 163 }
 164
 165 bool ircd_connector::AddWriteBuf(std::string data)
 166 {
 167         log(DEBUG,"connector::AddWriteBuf(%s)",data.c_str());
 168         if (this->GetWriteError() != "")
 169                 return false;
 170         std::stringstream stream;
 171         stream << sendq << data;
 172         sendq = stream.str();
 173         return true;
 174 }
 175
 176 bool ircd_connector::HasBufferedOutput()
 177 {
 178         return (sendq.length() > 0);
 179 }
 180
 181 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 182 bool ircd_connector::FlushWriteBuf()
 183 {
 184         log(DEBUG,"connector::FlushWriteBuf()");
 185         if (sendq.length())
 186         {
 187                 char* tb = (char*)this->sendq.c_str();
 188                 int n_sent = write(this->fd,tb,this->sendq.length());
 189                 if (n_sent == -1)
 190                 {
 191                         this->SetWriteError(strerror(errno));
 192                         return false;
 193                 }
 194                 else
 195                 {
 196                         log(DEBUG,"Wrote %d chars to socket",n_sent);
 197                         // advance the queue
 198                         tb += n_sent;
 199                         this->sendq = tb;
 200                         return true;
 201                 }
 202         }
 203         return true;
 204 }
 205
 206 void ircd_connector::SetWriteError(std::string error)
 207 {
 208         if (this->WriteError == "")
 209                 this->WriteError = error;
 210 }
 211
 212 std::string ircd_connector::GetWriteError()
 213 {
 214         return this->WriteError;
 215 }
 216
 217
 218 bool ircd_connector::MakeOutboundConnection(char* newhost, int newport)
 219 {
 220         log(DEBUG,"MakeOutboundConnection: Original param: %s",newhost);
 221         ClearBuffer();
 222         hostent* hoste = gethostbyname(newhost);
 223         if (!hoste)
 224         {
 225                 log(DEBUG,"MakeOutboundConnection: gethostbyname was NULL, setting %s",newhost);
 226                 this->SetHostAddress(newhost,newport);
 227                 SetHostAndPort(newhost,newport);
 228         }
 229         else
 230         {
 231                 struct in_addr* ia = (in_addr*)hoste->h_addr;
 232                 log(DEBUG,"MakeOutboundConnection: gethostbyname was valid, setting %s",inet_ntoa(*ia));
 233                 this->SetHostAddress(inet_ntoa(*ia),newport);
 234                 SetHostAndPort(inet_ntoa(*ia),newport);
 235         }
 236
 237         this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 238         if (this->fd >= 0)
 239         {
 240                 if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)))
 241                 {
 242                         WriteOpers("connect() failed for %s",host);
 243                         RemoveServer(this->servername.c_str());
 244                         return false;
 245                 }
 246                 int flags = fcntl(this->fd, F_GETFL, 0);
 247                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 248                 int sendbuf = 32768;
 249                 int recvbuf = 32768;
 250                 setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 251                 setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 252                 return true;
 253         }
 254         else
 255         {
 256                 WriteOpers("socket() failed!");
 257                 RemoveServer(this->servername.c_str());
 258         }
 259
 260         return false;
 261 }
 262
 263
 264 void ircd_connector::SetVersionString(std::string newversion)
 265 {
 266         log(DEBUG,"Set version of %s to %s",this->servername.c_str(),newversion.c_str());
 267         this->version = newversion;
 268 }
 269
 270 std::string ircd_connector::GetVersionString()
 271 {
 272         return this->version;
 273 }
 274
 275
 276 std::string ircd_connector::GetServerName()
 277 {
 278         return this->servername;
 279 }
 280
 281 std::string ircd_connector::GetDescription()
 282 {
 283         return this->description;
 284 }
 285
 286 void ircd_connector::SetServerName(std::string serv)
 287 {
 288         this->servername = serv;
 289 }
 290
 291 void ircd_connector::SetDescription(std::string desc)
 292 {
 293         this->description = desc;
 294 }
 295
 296
 297 int ircd_connector::GetDescriptor()
 298 {
 299         return this->fd;
 300 }
 301
 302 int ircd_connector::GetState()
 303 {
 304         return this->state;
 305 }
 306
 307
 308 void ircd_connector::SetState(int newstate)
 309 {
 310         this->state = newstate;
 311         if (state == STATE_DISCONNECTED)
 312         {
 313                 NetSendMyRoutingTable();
 314         }
 315 }
 316
 317 void ircd_connector::CloseConnection()
 318 {
 319         shutdown(this->fd,2);
 320         close(this->fd);
 321 }
 322
 323 void ircd_connector::SetDescriptor(int newfd)
 324 {
 325         this->fd = newfd;
 326 }