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 bool ircd_connector::SetHostAddress(char* host, int port)
  97 {
  98         memset((void*)&addr, 0, sizeof(addr));
  99         addr.sin_family = AF_INET;
 100         inet_aton(host,&addr.sin_addr);
 101         addr.sin_port = htons(port);
 102         return true;
 103 }
 104
 105 bool ircd_connector::MakeOutboundConnection(char* host, int port)
 106 {
 107         hostent* hoste = gethostbyname(host);
 108         if (!hoste)
 109         {
 110                 WriteOpers("Failed to look up hostname for %s, using as an ip address",host);
 111                 this->SetHostAddress(host,port);
 112         }
 113         else
 114         {
 115                 WriteOpers("Found hostname for %s",host);
 116                 this->SetHostAddress(hoste->h_addr,port);
 117         }
 118
 119         this->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 120         if (this->fd >= 0)
 121         {
 122                 if(connect(this->fd, (sockaddr*)&addr,sizeof(addr)))
 123                 {
 124                         WriteOpers("connect() failed for %s",host);
 125                         return false;
 126                 }
 127                 int flags = fcntl(this->fd, F_GETFL, 0);
 128                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 129                 int sendbuf = 32768;
 130                 int recvbuf = 32768;
 131                 setsockopt(this->fd,SOL_SOCKET,SO_SNDBUF,(const void *)&sendbuf,sizeof(sendbuf));
 132                 setsockopt(this->fd,SOL_SOCKET,SO_RCVBUF,(const void *)&recvbuf,sizeof(sendbuf));
 133                 return true;
 134         }
 135         else
 136         {
 137                 WriteOpers("socket() failed!");
 138         }
 139
 140         return false;
 141 }
 142
 143
 144 bool connection::BeginLink(char* targethost, int port, char* password, char* servername)
 145 {
 146         char connect[MAXBUF];
 147
 148         ircd_connector connector;
 149
 150         if (this->fd)
 151         {
 152                 if (connector.MakeOutboundConnection(targethost,port))
 153                 {
 154                         // targethost has been turned into an ip...
 155                         // we dont want this as the server name.
 156                         connector.SetServerName(servername);
 157                         sprintf(connect,"S %s %s :%s",getservername().c_str(),password,getserverdesc().c_str());
 158                         connector.SetState(STATE_NOAUTH_OUTBOUND);
 159                         this->connectors.push_back(connector);
 160                         return this->SendPacket(connect, servername);
 161                 }
 162                 else
 163                 {
 164                         WriteOpers("Could not create outbound connection to %s:%d",targethost,port);
 165                 }
 166         }
 167         return false;
 168 }
 169
 170 bool connection::AddIncoming(int fd,char* targethost)
 171 {
 172         char connect[MAXBUF];
 173
 174         ircd_connector connector;
 175
 176         // targethost has been turned into an ip...
 177         // we dont want this as the server name.
 178         connector.SetServerName(targethost);
 179         connector.SetDescriptor(fd);
 180         connector.SetState(STATE_NOAUTH_INBOUND);
 181         this->connectors.push_back(connector);
 182         return true;
 183 }
 184
 185 void connection::TerminateLink(char* targethost)
 186 {
 187         // this locates the targethost in the connection::connectors vector of the class,
 188         // and terminates it by sending it an SQUIT token and closing its descriptor.
 189         // TerminateLink with a null string causes a terminate of ALL links
 190 }
 191
 192
 193 // Returns a pointer to the connector for 'host'
 194 ircd_connector* connection::FindHost(std::string host)
 195 {
 196         for (int i = 0; i < this->connectors.size(); i++)
 197         {
 198                 if (this->connectors[i].GetServerName() == host)
 199                 {
 200                         return &this->connectors[i];
 201                 }
 202         }
 203         return NULL;
 204 }
 205
 206 std::string ircd_connector::GetServerName()
 207 {
 208         return this->servername;
 209 }
 210
 211 void ircd_connector::SetServerName(std::string serv)
 212 {
 213         this->servername = serv;
 214 }
 215
 216
 217 int ircd_connector::GetDescriptor()
 218 {
 219         return this->fd;
 220 }
 221
 222 int ircd_connector::GetState()
 223 {
 224         return this->state;
 225 }
 226
 227
 228 void ircd_connector::SetState(int state)
 229 {
 230         this->state = state;
 231 }
 232
 233 void ircd_connector::SetDescriptor(int fd)
 234 {
 235         this->fd = fd;
 236 }
 237
 238 bool connection::SendPacket(char *message, char* host)
 239 {
 240         ircd_connector* cn = this->FindHost(host);
 241
 242         if (cn)
 243         {
 244                 log(DEBUG,"main: Connection::SendPacket() sent '%s' to %s",message,cn->GetServerName().c_str());
 245
 246                 strncat(message,"\n",MAXBUF);
 247                 // returns false if the packet could not be sent (e.g. target host down)
 248                 if (send(cn->GetDescriptor(),message,strlen(message),0)<0)
 249                 {
 250                         log(DEBUG,"send() failed for Connection::SendPacket(): %s",strerror(errno));
 251                         return false;
 252                 }
 253                 return true;
 254         }
 255 }
 256
 257 // receives a packet from any where there is data waiting, first come, first served
 258 // fills the message and host values with the host where the data came from.
 259
 260 bool connection::RecvPacket(std::deque<std::string> &messages, char* host)
 261 {
 262         char data[32767];
 263         memset(data, 0, 32767);
 264         for (int i = 0; i < this->connectors.size(); i++)
 265         {
 266                 // returns false if the packet could not be sent (e.g. target host down)
 267                 int rcvsize = 0;
 268                 if (rcvsize = recv(this->connectors[i].GetDescriptor(),data,32767,0))
 269                 {
 270                         if (rcvsize > 0)
 271                         {
 272                                 char* l = strtok(data,"\n");
 273                                 while (l)
 274                                 {
 275                                         char sanitized[32767];
 276                                         memset(sanitized, 0, 32767);
 277                                         int ptt = 0;
 278                                         for (int pt = 0; pt < strlen(l); pt++)
 279                                         {
 280                                                 if (l[pt] != '\r')
 281                                                 {
 282                                                         sanitized[ptt++] = l[pt];
 283                                                 }
 284                                         }
 285                                         sanitized[ptt] = '\0';
 286                                         if (strlen(sanitized))
 287                                         {
 288                                                 messages.push_back(sanitized);
 289                                                 strncpy(host,this->connectors[i].GetServerName().c_str(),160);
 290                                                 log(DEBUG,"main: Connection::RecvPacket() got '%s' from %s",sanitized,host);
 291
 292                                         }
 293                                         l = strtok(NULL,"\n");
 294                                 }
 295                                 return true;
 296                         }
 297                 }
 298         }
 299         // nothing new yet -- message and host will be undefined
 300         return false;
 301 }
 302
 303 long connection::GenKey()
 304 {
 305         srand(time(NULL));
 306         return (random()*time(NULL));
 307 }
 308