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