src/connection.cpp

   1 #include <connection.h>
   2 #include <unistd.h>
   3 #include <fcntl.h>
   4 #include <sys/errno.h>
   5 #include <sys/ioctl.h>
   6 #include <sys/utsname.h>
   7 #include <vector>
   8 #include <string>
   9 #include <deque>
  10 #include "inspircd.h"
  11 #include "modules.h"
  12
  13 using namespace std;
  14
  15 extern std::vector<Module*> modules;
  16 extern std::vector<ircd_module*> factory;
  17
  18 extern int MODCOUNT;
  19
  20
  21 packet::packet()
  22 {
  23         srand(time(NULL));
  24         id = random();
  25 }
  26
  27 packet::~packet()
  28 {
  29 }
  30
  31 connection::connection()
  32 {
  33         key = GenKey();
  34         fd = 0;
  35 }
  36
  37
  38 bool connection::CreateListener(char* host, int p)
  39 {
  40         sockaddr_in host_address;
  41         int flags;
  42         in_addr addy;
  43         int on = 0;
  44         struct linger linger = { 0 };
  45
  46         fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  47         if (fd <= 0)
  48         {
  49                 return false;
  50         }
  51
  52         memset((void*)&host_address, 0, sizeof(host_address));
  53
  54         host_address.sin_family = AF_INET;
  55
  56         if (!strcmp(host,""))
  57         {
  58                 host_address.sin_addr.s_addr = htonl(INADDR_ANY);
  59         }
  60         else
  61         {
  62                 inet_aton(host,&addy);
  63                 host_address.sin_addr = addy;
  64         }
  65
  66         host_address.sin_port = htons(p);
  67
  68         if (bind(fd,(sockaddr*)&host_address,sizeof(host_address))<0)
  69         {
  70                 return false;
  71         }
  72
  73         // make the socket non-blocking
  74         flags = fcntl(fd, F_GETFL, 0);
  75         fcntl(fd, F_SETFL, flags | O_NONBLOCK);
  76
  77         this->port = p;
  78
  79         setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(const char*)&on,sizeof(on));
  80         linger.l_onoff = 1;
  81         linger.l_linger = 0;
  82         setsockopt(fd,SOL_SOCKET,SO_LINGER,(const char*)&linger,sizeof(linger));
  83
  84         // attempt to increase socket sendq and recvq as high as its possible
  85         // to get them on linux.
  86         int sendbuf = 32768;
  87         int recvbuf = 32768;
  88         setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
  89         setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
  90
  91         listen(this->fd,5);
  92
  93         return true;
  94 }
  95
  96 char* ircd_connector::GetServerIP()
  97 {
  98         return this->host;
  99 }
 100
 101 int ircd_connector::GetServerPort()
 102 {
 103         return this->port;
 104 }
 105
 106 bool ircd_connector::SetHostAndPort(char* host, int port)
 107 {
 108         strncpy(this->host,host,160);
 109         this->port = port;
 110         return true;
 111 }
 112
 113 bool ircd_connector::SetHostAddress(char* host, int port)
 114 {
 115         strncpy(this->host,host,160);
 116         this->port = port;
 117         memset((void*)&addr, 0, sizeof(addr));
 118         addr.sin_family = AF_INET;
 119         inet_aton(host,&addr.sin_addr);
 120         addr.sin_port = htons(port);
 121         return true;
 122 }
 123
 124 bool ircd_connector::MakeOutboundConnection(char* host, int port)
 125 {
 126         hostent* hoste = gethostbyname(host);
 127         if (!hoste)
 128         {
 129                 WriteOpers("Failed to look up hostname for %s, using as an ip address",host);
 130                 this->SetHostAddress(host,port);
 131                 SetHostAndPort(host,port);
 132         }
 133         else
 134         {
 135                 WriteOpers("Found hostname for %s",host);
 136                 this->SetHostAddress(hoste->h_addr,port);
 137                 SetHostAndPort(hoste->h_addr,port);
 138         }
 139
 140         this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 141         if (this->fd >= 0)
 142         {
 143                 if(connect(this->fd, (sockaddr*)&addr,sizeof(addr)))
 144                 {
 145                         WriteOpers("connect() failed for %s",host);
 146                         return false;
 147                 }
 148                 int flags = fcntl(this->fd, F_GETFL, 0);
 149                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 150                 int sendbuf = 32768;
 151                 int recvbuf = 32768;
 152                 setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 153                 setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 154                 return true;
 155         }
 156         else
 157         {
 158                 WriteOpers("socket() failed!");
 159         }
 160
 161         return false;
 162 }
 163
 164
 165 bool connection::BeginLink(char* targethost, int port, char* password, char* servername)
 166 {
 167         char connect[MAXBUF];
 168
 169         ircd_connector connector;
 170
 171         if (this->fd)
 172         {
 173                 if (connector.MakeOutboundConnection(targethost,port))
 174                 {
 175                         // targethost has been turned into an ip...
 176                         // we dont want this as the server name.
 177                         connector.SetServerName(servername);
 178                         sprintf(connect,"S %s %s :%s",getservername().c_str(),password,getserverdesc().c_str());
 179                         connector.SetState(STATE_NOAUTH_OUTBOUND);
 180                         this->connectors.push_back(connector);
 181                         return this->SendPacket(connect, servername);
 182                 }
 183                 else
 184                 {
 185                         WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
 186                 }
 187         }
 188         return false;
 189 }
 190
 191 bool connection::MeshCookie(char* targethost, int port, long cookie, char* servername)
 192 {
 193         char connect[MAXBUF];
 194
 195         ircd_connector connector;
 196
 197         WriteOpers("Establishing meshed link to %s:%d",servername,port);
 198
 199         if (this->fd)
 200         {
 201                 if (connector.MakeOutboundConnection(targethost,port))
 202                 {
 203                         // targethost has been turned into an ip...
 204                         // we dont want this as the server name.
 205                         connector.SetServerName(servername);
 206                         sprintf(connect,"- %d %s :%s",cookie,getservername().c_str(),getserverdesc().c_str());
 207                         connector.SetState(STATE_NOAUTH_OUTBOUND);
 208                         this->connectors.push_back(connector);
 209                         return this->SendPacket(connect, servername);
 210                 }
 211                 else
 212                 {
 213                         WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
 214                 }
 215         }
 216         return false;
 217 }
 218
 219 bool connection::AddIncoming(int fd,char* targethost, int sourceport)
 220 {
 221         char connect[MAXBUF];
 222
 223         ircd_connector connector;
 224
 225         // targethost has been turned into an ip...
 226         // we dont want this as the server name.
 227         connector.SetHostAndPort(targethost, sourceport);
 228         connector.SetServerName(targethost);
 229         connector.SetDescriptor(fd);
 230         connector.SetState(STATE_NOAUTH_INBOUND);
 231         int flags = fcntl(fd, F_GETFL, 0);
 232         fcntl(fd, F_SETFL, flags | O_NONBLOCK);
 233         int sendbuf = 32768;
 234         int recvbuf = 32768;
 235         setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 236         setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 237         log(DEBUG,"connection::AddIncoming() Added connection: %s:%d",host,sourceport);
 238         this->connectors.push_back(connector);
 239         return true;
 240 }
 241
 242 void connection::TerminateLink(char* targethost)
 243 {
 244         // this locates the targethost in the connection::connectors vector of the class,
 245         // and terminates it by sending it an SQUIT token and closing its descriptor.
 246         // TerminateLink with a null string causes a terminate of ALL links
 247 }
 248
 249
 250 // Returns a pointer to the connector for 'host'
 251 ircd_connector* connection::FindHost(std::string host)
 252 {
 253         for (int i = 0; i < this->connectors.size(); i++)
 254         {
 255                 if (this->connectors[i].GetServerName() == host)
 256                 {
 257                         return &this->connectors[i];
 258                 }
 259         }
 260         return NULL;
 261 }
 262
 263 std::string ircd_connector::GetServerName()
 264 {
 265         return this->servername;
 266 }
 267
 268 void ircd_connector::SetServerName(std::string serv)
 269 {
 270         this->servername = serv;
 271 }
 272
 273
 274 int ircd_connector::GetDescriptor()
 275 {
 276         return this->fd;
 277 }
 278
 279 int ircd_connector::GetState()
 280 {
 281         return this->state;
 282 }
 283
 284
 285 void ircd_connector::SetState(int state)
 286 {
 287         this->state = state;
 288 }
 289
 290 void ircd_connector::SetDescriptor(int fd)
 291 {
 292         this->fd = fd;
 293 }
 294
 295 bool connection::SendPacket(char *message, const char* host)
 296 {
 297         ircd_connector* cn = this->FindHost(host);
 298
 299         if (cn)
 300         {
 301                 log(DEBUG,"main: Connection::SendPacket() sent '%s' to %s",message,cn->GetServerName().c_str());
 302
 303                 strncat(message,"\n",MAXBUF);
 304                 // returns false if the packet could not be sent (e.g. target host down)
 305                 if (send(cn->GetDescriptor(),message,strlen(message),0)<0)
 306                 {
 307                         log(DEBUG,"send() failed for Connection::SendPacket(): %s",strerror(errno));
 308                         return false;
 309                 }
 310                 return true;
 311         }
 312 }
 313
 314 // receives a packet from any where there is data waiting, first come, first served
 315 // fills the message and host values with the host where the data came from.
 316
 317 bool connection::RecvPacket(std::deque<std::string> &messages, char* host)
 318 {
 319         char data[32767];
 320         memset(data, 0, 32767);
 321         for (int i = 0; i < this->connectors.size(); i++)
 322         {
 323                 // returns false if the packet could not be sent (e.g. target host down)
 324                 int rcvsize = 0;
 325                 if (rcvsize = recv(this->connectors[i].GetDescriptor(),data,32767,0))
 326                 {
 327                         if (rcvsize > 0)
 328                         {
 329                                 char* l = strtok(data,"\n");
 330                                 while (l)
 331                                 {
 332                                         char sanitized[32767];
 333                                         memset(sanitized, 0, 32767);
 334                                         int ptt = 0;
 335                                         for (int pt = 0; pt < strlen(l); pt++)
 336                                         {
 337                                                 if (l[pt] != '\r')
 338                                                 {
 339                                                         sanitized[ptt++] = l[pt];
 340                                                 }
 341                                         }
 342                                         sanitized[ptt] = '\0';
 343                                         if (strlen(sanitized))
 344                                         {
 345                                                 messages.push_back(sanitized);
 346                                                 strncpy(host,this->connectors[i].GetServerName().c_str(),160);
 347                                                 log(DEBUG,"main: Connection::RecvPacket() got '%s' from %s",sanitized,host);
 348
 349                                         }
 350                                         l = strtok(NULL,"\n");
 351                                 }
 352                                 return true;
 353                         }
 354                 }
 355         }
 356         // nothing new yet -- message and host will be undefined
 357         return false;
 358 }
 359
 360 long connection::GenKey()
 361 {
 362         srand(time(NULL));
 363         return (random()*time(NULL));
 364 }
 365