src/socket.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 "inspircd_config.h"
  20 #include <sys/time.h>
  21 #include <sys/resource.h>
  22 #include <sys/types.h>
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <string>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <poll.h>
  29 #include <sstream>
  30 #include <iostream>
  31 #include <fstream>
  32 #include "socket.h"
  33 #include "inspircd.h"
  34 #include "inspircd_io.h"
  35 #include "inspircd_util.h"
  36 #include "inspstring.h"
  37 #include "helperfuncs.h"
  38 #include "socketengine.h"
  39
  40 extern SocketEngine* SE;
  41
  42 extern int boundPortCount;
  43 extern int openSockfd[MAXSOCKS];
  44 extern time_t TIME;
  45
  46 InspSocket* socket_ref[65535];
  47
  48 InspSocket::InspSocket()
  49 {
  50         this->state = I_DISCONNECTED;
  51 }
  52
  53 InspSocket::InspSocket(int newfd, char* ip)
  54 {
  55         this->fd = newfd;
  56         this->state = I_CONNECTED;
  57         this->IP = ip;
  58         SE->AddFd(this->fd,true,X_ESTAB_MODULE);
  59         socket_ref[this->fd] = this;
  60 }
  61
  62 InspSocket::InspSocket(std::string host, int port, bool listening, unsigned long maxtime)
  63 {
  64         if (listening) {
  65                 if ((this->fd = OpenTCPSocket()) == ERROR)
  66                 {
  67                         this->fd = -1;
  68                         this->state = I_ERROR;
  69                         this->OnError(I_ERR_SOCKET);
  70                         log(DEBUG,"OpenTCPSocket() error");
  71                         return;
  72                 }
  73                 else
  74                 {
  75                         if (BindSocket(this->fd,this->client,this->server,port,(char*)host.c_str()) == ERROR)
  76                         {
  77                                 this->Close();
  78                                 this->fd = -1;
  79                                 this->state = I_ERROR;
  80                                 this->OnError(I_ERR_BIND);
  81                                 log(DEBUG,"BindSocket() error %s",strerror(errno));
  82                                 return;
  83                         }
  84                         else
  85                         {
  86                                 this->state = I_LISTENING;
  87                                 SE->AddFd(this->fd,true,X_ESTAB_MODULE);
  88                                 socket_ref[this->fd] = this;
  89                                 log(DEBUG,"New socket now in I_LISTENING state");
  90                                 return;
  91                         }
  92                 }
  93         } else {
  94                 char* ip;
  95                 this->host = host;
  96                 hostent* hoste = gethostbyname(host.c_str());
  97                 if (!hoste) {
  98                         ip = (char*)host.c_str();
  99                 } else {
 100                         struct in_addr* ia = (in_addr*)hoste->h_addr;
 101                         ip = inet_ntoa(*ia);
 102                 }
 103
 104                 this->IP = ip;
 105
 106                 timeout_end = time(NULL)+maxtime;
 107                 timeout = false;
 108                 if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
 109                 {
 110                         this->state = I_ERROR;
 111                         this->OnError(I_ERR_SOCKET);
 112                         return;
 113                 }
 114                 this->port = port;
 115                 inet_aton(ip,&addy);
 116                 addr.sin_family = AF_INET;
 117                 addr.sin_addr = addy;
 118                 addr.sin_port = htons(this->port);
 119
 120                 int flags;
 121                 flags = fcntl(this->fd, F_GETFL, 0);
 122                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
 123
 124                 if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
 125                 {
 126                         if (errno != EINPROGRESS)
 127                         {
 128                                 this->Close();
 129                                 this->OnError(I_ERR_CONNECT);
 130                                 this->state = I_ERROR;
 131                                 return;
 132                         }
 133                 }
 134                 this->state = I_CONNECTING;
 135                 SE->AddFd(this->fd,false,X_ESTAB_MODULE);
 136                 socket_ref[this->fd] = this;
 137                 return;
 138         }
 139 }
 140
 141 void InspSocket::Close()
 142 {
 143         if (this->fd != -1)
 144         {
 145                 this->OnClose();
 146                 shutdown(this->fd,2);
 147                 close(this->fd);
 148                 socket_ref[this->fd] = NULL;
 149                 this->fd = -1;
 150         }
 151 }
 152
 153 std::string InspSocket::GetIP()
 154 {
 155         return this->IP;
 156 }
 157
 158 char* InspSocket::Read()
 159 {
 160         int n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
 161         if (n > 0)
 162         {
 163                 ibuf[n] = 0;
 164                 return ibuf;
 165         }
 166         else
 167         {
 168                 log(DEBUG,"EOF or error on socket");
 169                 return NULL;
 170         }
 171 }
 172
 173 // There are two possible outcomes to this function.
 174 // It will either write all of the data, or an undefined amount.
 175 // If an undefined amount is written the connection has failed
 176 // and should be aborted.
 177 int InspSocket::Write(std::string data)
 178 {
 179         char* d = (char*)data.c_str();
 180         unsigned int written = 0;
 181         int n = 0;
 182         int s = data.length();
 183         while ((written < data.length()) && (n >= 0))
 184         {
 185                 n = send(this->fd,d,s,0);
 186                 if (n > 0)
 187                 {
 188                         // If we didnt write everything, advance
 189                         // the pointers so that when we retry
 190                         // the next time around the loop, we try
 191                         // to write what we failed to write before.
 192                         written += n;
 193                         s -= n;
 194                         d += n;
 195                 }
 196         }
 197         return written;
 198 }
 199
 200 bool InspSocket::Timeout(time_t current)
 201 {
 202         if ((this->state == I_CONNECTING) && (current > timeout_end))
 203         {
 204                 // for non-listening sockets, the timeout can occur
 205                 // which causes termination of the connection after
 206                 // the given number of seconds without a successful
 207                 // connection.
 208                 this->OnTimeout();
 209                 this->OnError(I_ERR_TIMEOUT);
 210                 timeout = true;
 211                 this->state = I_ERROR;
 212                 return true;
 213         }
 214         return false;
 215 }
 216
 217 bool InspSocket::Poll()
 218 {
 219         int incoming = -1;
 220
 221         switch (this->state)
 222         {
 223                 case I_CONNECTING:
 224                         this->SetState(I_CONNECTED);
 225                         /* Our socket was in write-state, so delete it and re-add it
 226                          * in read-state.
 227                          */
 228                         SE->DelFd(this->fd);
 229                         SE->AddFd(this->fd,true,X_ESTAB_MODULE);
 230                         return this->OnConnected();
 231                 break;
 232                 case I_LISTENING:
 233                         length = sizeof (client);
 234                         incoming = accept (this->fd, (sockaddr*)&client,&length);
 235                         this->OnIncomingConnection(incoming,inet_ntoa(client.sin_addr));
 236                         return true;
 237                 break;
 238                 case I_CONNECTED:
 239                         return this->OnDataReady();
 240                 break;
 241                 default:
 242                 break;
 243         }
 244
 245         return true;
 246 }
 247
 248 void InspSocket::SetState(InspSocketState s)
 249 {
 250         log(DEBUG,"Socket state change");
 251         this->state = s;
 252 }
 253
 254 InspSocketState InspSocket::GetState()
 255 {
 256         return this->state;
 257 }
 258
 259 int InspSocket::GetFd()
 260 {
 261         return this->fd;
 262 }
 263
 264 bool InspSocket::OnConnected() { return true; }
 265 void InspSocket::OnError(InspSocketError e) { return; }
 266 int InspSocket::OnDisconnect() { return 0; }
 267 int InspSocket::OnIncomingConnection(int newfd, char* ip) { return 0; }
 268 bool InspSocket::OnDataReady() { return true; }
 269 void InspSocket::OnTimeout() { return; }
 270 void InspSocket::OnClose() { return; }
 271
 272 InspSocket::~InspSocket()
 273 {
 274         this->Close();
 275 }
 276
 277 /*
 278 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
 279 int OpenTCPSocket (void)
 280 */