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 bool 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         return (ircdbuffer.length() < 1048576);
 132 }
 133
 134 bool ircd_connector::BufferIsComplete()
 135 {
 136         for (int i = 0; i < ircdbuffer.length(); i++)
 137                 if (ircdbuffer[i] == '\n')
 138                         return true;
 139         return false;
 140 }
 141
 142 void ircd_connector::ClearBuffer()
 143 {
 144         ircdbuffer = "";
 145 }
 146
 147 std::string ircd_connector::GetBuffer()
 148 {
 149         // Fix by Brain 28th Apr 2005
 150         // seems my stringstream code isnt liked by linux
 151         // EVEN THOUGH IT IS CORRECT! Fixed by using a different
 152         // (SLOWER) algorithm...
 153         char* line = (char*)ircdbuffer.c_str();
 154         std::string ret = "";
 155         while ((*line != '\n') && (strlen(line)))
 156         {
 157                 ret = ret + *line;
 158                 line++;
 159         }
 160         if ((*line == '\n') || (*line == '\r'))
 161                 line++;
 162         ircdbuffer = line;
 163         return ret;
 164 }
 165
 166 bool ircd_connector::AddWriteBuf(std::string data)
 167 {
 168         log(DEBUG,"connector::AddWriteBuf(%s)",data.c_str());
 169         if (this->GetWriteError() != "")
 170                 return false;
 171         std::stringstream stream;
 172         stream << sendq << data;
 173         sendq = stream.str();
 174         return (sendq.length() < 1048576);
 175 }
 176
 177 bool ircd_connector::HasBufferedOutput()
 178 {
 179         return (sendq.length() > 0);
 180 }
 181
 182 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 183 bool ircd_connector::FlushWriteBuf()
 184 {
 185         log(DEBUG,"connector::FlushWriteBuf()");
 186         if (sendq.length())
 187         {
 188                 char* tb = (char*)this->sendq.c_str();
 189                 int n_sent = write(this->fd,tb,this->sendq.length());
 190                 if (n_sent == -1)
 191                 {
 192                         this->SetWriteError(strerror(errno));
 193                         return false;
 194                 }
 195                 else
 196                 {
 197                         log(DEBUG,"Wrote %d chars to socket",n_sent);
 198                         // advance the queue
 199                         tb += n_sent;
 200                         this->sendq = tb;
 201                         return true;
 202                 }
 203         }
 204         return true;
 205 }
 206
 207 void ircd_connector::SetWriteError(std::string error)
 208 {
 209         if (this->WriteError == "")
 210                 this->WriteError = error;
 211 }
 212
 213 std::string ircd_connector::GetWriteError()
 214 {
 215         return this->WriteError;
 216 }
 217
 218
 219 bool ircd_connector::MakeOutboundConnection(char* newhost, int newport)
 220 {
 221         log(DEBUG,"MakeOutboundConnection: Original param: %s",newhost);
 222         ClearBuffer();
 223         hostent* hoste = gethostbyname(newhost);
 224         if (!hoste)
 225         {
 226                 log(DEBUG,"MakeOutboundConnection: gethostbyname was NULL, setting %s",newhost);
 227                 this->SetHostAddress(newhost,newport);
 228                 SetHostAndPort(newhost,newport);
 229         }
 230         else
 231         {
 232                 struct in_addr* ia = (in_addr*)hoste->h_addr;
 233                 log(DEBUG,"MakeOutboundConnection: gethostbyname was valid, setting %s",inet_ntoa(*ia));
 234                 this->SetHostAddress(inet_ntoa(*ia),newport);
 235                 SetHostAndPort(inet_ntoa(*ia),newport);
 236         }
 237
 238         this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 239         if (this->fd >= 0)
 240         {
 241                 if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)))
 242                 {
 243                         WriteOpers("connect() failed for %s",host);
 244                         RemoveServer(this->servername.c_str());
 245                         return false;
 246                 }
 247                 int flags = fcntl(this->fd, F_GETFL, 0);
 248                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 249                 int sendbuf = 32768;
 250                 int recvbuf = 32768;
 251                 setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 252                 setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 253                 return true;
 254         }
 255         else
 256         {
 257                 WriteOpers("socket() failed!");
 258                 RemoveServer(this->servername.c_str());
 259         }
 260
 261         return false;
 262 }
 263
 264
 265 void ircd_connector::SetVersionString(std::string newversion)
 266 {
 267         log(DEBUG,"Set version of %s to %s",this->servername.c_str(),newversion.c_str());
 268         this->version = newversion;
 269 }
 270
 271 std::string ircd_connector::GetVersionString()
 272 {
 273         return this->version;
 274 }
 275
 276
 277 std::string ircd_connector::GetServerName()
 278 {
 279         return this->servername;
 280 }
 281
 282 std::string ircd_connector::GetDescription()
 283 {
 284         return this->description;
 285 }
 286
 287 void ircd_connector::SetServerName(std::string serv)
 288 {
 289         this->servername = serv;
 290 }
 291
 292 void ircd_connector::SetDescription(std::string desc)
 293 {
 294         this->description = desc;
 295 }
 296
 297
 298 int ircd_connector::GetDescriptor()
 299 {
 300         return this->fd;
 301 }
 302
 303 int ircd_connector::GetState()
 304 {
 305         return this->state;
 306 }
 307
 308
 309 void ircd_connector::SetState(int newstate)
 310 {
 311         this->state = newstate;
 312         if (state == STATE_DISCONNECTED)
 313         {
 314                 NetSendMyRoutingTable();
 315         }
 316 }
 317
 318 void ircd_connector::CloseConnection()
 319 {
 320         shutdown(this->fd,2);
 321         close(this->fd);
 322 }
 323
 324 void ircd_connector::SetDescriptor(int newfd)
 325 {
 326         this->fd = newfd;
 327 }