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         }
 132         else
 133         {
 134                 WriteOpers("Found hostname for %s",host);
 135                 this->SetHostAddress(hoste->h_addr,port);
 136         }
 137
 138         this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 139         if (this->fd >= 0)
 140         {
 141                 if(connect(this->fd, (sockaddr*)&addr,sizeof(addr)))
 142                 {
 143                         WriteOpers("connect() failed for %s",host);
 144                         return false;
 145                 }
 146                 int flags = fcntl(this->fd, F_GETFL, 0);
 147                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 148                 int sendbuf = 32768;
 149                 int recvbuf = 32768;
 150                 setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 151                 setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 152                 return true;
 153         }
 154         else
 155         {
 156                 WriteOpers("socket() failed!");
 157         }
 158
 159         return false;
 160 }
 161
 162
 163 bool connection::BeginLink(char* targethost, int port, char* password, char* servername)
 164 {
 165         char connect[MAXBUF];
 166
 167         ircd_connector connector;
 168
 169         if (this->fd)
 170         {
 171                 if (connector.MakeOutboundConnection(targethost,port))
 172                 {
 173                         // targethost has been turned into an ip...
 174                         // we dont want this as the server name.
 175                         connector.SetServerName(servername);
 176                         sprintf(connect,"S %s %s :%s",getservername().c_str(),password,getserverdesc().c_str());
 177                         connector.SetState(STATE_NOAUTH_OUTBOUND);
 178                         this->connectors.push_back(connector);
 179                         return this->SendPacket(connect, servername);
 180                 }
 181                 else
 182                 {
 183                         WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
 184                 }
 185         }
 186         return false;
 187 }
 188
 189 bool connection::MeshCookie(char* targethost, int port, long cookie, char* servername)
 190 {
 191         char connect[MAXBUF];
 192
 193         ircd_connector connector;
 194
 195         WriteOpers("Establishing meshed link to %s:%d",targethost,port);
 196
 197         if (this->fd)
 198         {
 199                 if (connector.MakeOutboundConnection(targethost,port))
 200                 {
 201                         // targethost has been turned into an ip...
 202                         // we dont want this as the server name.
 203                         connector.SetServerName(servername);
 204                         sprintf(connect,"- %d %s :%s",cookie,getservername().c_str(),getserverdesc().c_str());
 205                         connector.SetState(STATE_NOAUTH_OUTBOUND);
 206                         this->connectors.push_back(connector);
 207                         return this->SendPacket(connect, servername);
 208                 }
 209                 else
 210                 {
 211                         WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
 212                 }
 213         }
 214         return false;
 215 }
 216
 217 bool connection::AddIncoming(int fd,char* targethost, int sourceport)
 218 {
 219         char connect[MAXBUF];
 220
 221         ircd_connector connector;
 222
 223         // targethost has been turned into an ip...
 224         // we dont want this as the server name.
 225         connector.SetHostAndPort(targethost, sourceport);
 226         connector.SetServerName(targethost);
 227         connector.SetDescriptor(fd);
 228         connector.SetState(STATE_NOAUTH_INBOUND);
 229         int flags = fcntl(fd, F_GETFL, 0);
 230         fcntl(fd, F_SETFL, flags | O_NONBLOCK);
 231         int sendbuf = 32768;
 232         int recvbuf = 32768;
 233         setsockopt(fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 234         setsockopt(fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 235         log(DEBUG,"connection::AddIncoming() Added connection: %s:%d",host,sourceport);
 236         this->connectors.push_back(connector);
 237         return true;
 238 }
 239
 240 void connection::TerminateLink(char* targethost)
 241 {
 242         // this locates the targethost in the connection::connectors vector of the class,
 243         // and terminates it by sending it an SQUIT token and closing its descriptor.
 244         // TerminateLink with a null string causes a terminate of ALL links
 245 }
 246
 247
 248 // Returns a pointer to the connector for 'host'
 249 ircd_connector* connection::FindHost(std::string host)
 250 {
 251         for (int i = 0; i < this->connectors.size(); i++)
 252         {
 253                 if (this->connectors[i].GetServerName() == host)
 254                 {
 255                         return &this->connectors[i];
 256                 }
 257         }
 258         return NULL;
 259 }
 260
 261 std::string ircd_connector::GetServerName()
 262 {
 263         return this->servername;
 264 }
 265
 266 void ircd_connector::SetServerName(std::string serv)
 267 {
 268         this->servername = serv;
 269 }
 270
 271
 272 int ircd_connector::GetDescriptor()
 273 {
 274         return this->fd;
 275 }
 276
 277 int ircd_connector::GetState()
 278 {
 279         return this->state;
 280 }
 281
 282
 283 void ircd_connector::SetState(int state)
 284 {
 285         this->state = state;
 286 }
 287
 288 void ircd_connector::SetDescriptor(int fd)
 289 {
 290         this->fd = fd;
 291 }
 292
 293 bool connection::SendPacket(char *message, const char* host)
 294 {
 295         ircd_connector* cn = this->FindHost(host);
 296
 297         if (cn)
 298         {
 299                 log(DEBUG,"main: Connection::SendPacket() sent '%s' to %s",message,cn->GetServerName().c_str());
 300
 301                 strncat(message,"\n",MAXBUF);
 302                 // returns false if the packet could not be sent (e.g. target host down)
 303                 if (send(cn->GetDescriptor(),message,strlen(message),0)<0)
 304                 {
 305                         log(DEBUG,"send() failed for Connection::SendPacket(): %s",strerror(errno));
 306                         return false;
 307                 }
 308                 return true;
 309         }
 310 }
 311
 312 // receives a packet from any where there is data waiting, first come, first served
 313 // fills the message and host values with the host where the data came from.
 314
 315 bool connection::RecvPacket(std::deque<std::string> &messages, char* host)
 316 {
 317         char data[32767];
 318         memset(data, 0, 32767);
 319         for (int i = 0; i < this->connectors.size(); i++)
 320         {
 321                 // returns false if the packet could not be sent (e.g. target host down)
 322                 int rcvsize = 0;
 323                 if (rcvsize = recv(this->connectors[i].GetDescriptor(),data,32767,0))
 324                 {
 325                         if (rcvsize > 0)
 326                         {
 327                                 char* l = strtok(data,"\n");
 328                                 while (l)
 329                                 {
 330                                         char sanitized[32767];
 331                                         memset(sanitized, 0, 32767);
 332                                         int ptt = 0;
 333                                         for (int pt = 0; pt < strlen(l); pt++)
 334                                         {
 335                                                 if (l[pt] != '\r')
 336                                                 {
 337                                                         sanitized[ptt++] = l[pt];
 338                                                 }
 339                                         }
 340                                         sanitized[ptt] = '\0';
 341                                         if (strlen(sanitized))
 342                                         {
 343                                                 messages.push_back(sanitized);
 344                                                 strncpy(host,this->connectors[i].GetServerName().c_str(),160);
 345                                                 log(DEBUG,"main: Connection::RecvPacket() got '%s' from %s",sanitized,host);
 346
 347                                         }
 348                                         l = strtok(NULL,"\n");
 349                                 }
 350                                 return true;
 351                         }
 352                 }
 353         }
 354         // nothing new yet -- message and host will be undefined
 355         return false;
 356 }
 357
 358 long connection::GenKey()
 359 {
 360         srand(time(NULL));
 361         return (random()*time(NULL));
 362 }
 363