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