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socket.cpp

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00001 /*       +------------------------------------+
00002  *       | Inspire Internet Relay Chat Daemon |
00003  *       +------------------------------------+
00004  *
00005  *  Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
00006  *                       E-mail:
00007  *                <brain@chatspike.net>
00008  *                <Craig@chatspike.net>
00009  *     
00010  * Written by Craig Edwards, Craig McLure, and others.
00011  * This program is free but copyrighted software; see
00012  *            the file COPYING for details.
00013  *
00014  * ---------------------------------------------------
00015  */
00016 
00017 using namespace std;
00018 
00019 #include "inspircd_config.h"
00020 #include <sys/time.h>
00021 #include <sys/resource.h>
00022 #include <sys/types.h>
00023 #include <sys/socket.h>
00024 #include <netinet/in.h>
00025 #include <string>
00026 #include <unistd.h>
00027 #include <fcntl.h>
00028 #include <poll.h>
00029 #include <sstream>
00030 #include <iostream>
00031 #include <fstream>
00032 #include "socket.h"
00033 #include "inspircd.h"
00034 #include "inspircd_io.h"
00035 #include "inspircd_util.h"
00036 #include "inspstring.h"
00037 #include "helperfuncs.h"
00038 #include "socketengine.h"
00039 
00040 extern SocketEngine* SE;
00041 
00042 extern FILE *log_file;
00043 extern int boundPortCount;
00044 extern int openSockfd[MAXSOCKS];
00045 extern time_t TIME;
00046 extern bool unlimitcore;
00047 extern int MaxConn;
00048 
00049 InspSocket::InspSocket()
00050 {
00051         this->state = I_DISCONNECTED;
00052 }
00053 
00054 InspSocket::InspSocket(int newfd, char* ip)
00055 {
00056         this->fd = newfd;
00057         this->state = I_CONNECTED;
00058         this->IP = ip;
00059         SE->AddFd(this->fd,true,X_ESTAB_MODULE);
00060 }
00061 
00062 InspSocket::InspSocket(std::string host, int port, bool listening, unsigned long maxtime)
00063 {
00064         if (listening) {
00065                 if ((this->fd = OpenTCPSocket()) == ERROR)
00066                 {
00067                         this->fd = -1;
00068                         this->state = I_ERROR;
00069                         this->OnError(I_ERR_SOCKET);
00070                         log(DEBUG,"OpenTCPSocket() error");
00071                         return;
00072                 }
00073                 else
00074                 {
00075                         if (BindSocket(this->fd,this->client,this->server,port,(char*)host.c_str()) == ERROR)
00076                         {
00077                                 this->Close();
00078                                 this->fd = -1;
00079                                 this->state = I_ERROR;
00080                                 this->OnError(I_ERR_BIND);
00081                                 log(DEBUG,"BindSocket() error %s",strerror(errno));
00082                                 return;
00083                         }
00084                         else
00085                         {
00086                                 this->state = I_LISTENING;
00087                                 SE->AddFd(this->fd,true,X_ESTAB_MODULE);
00088                                 log(DEBUG,"New socket now in I_LISTENING state");
00089                                 return;
00090                         }
00091                 }                       
00092         } else {
00093                 char* ip;
00094                 this->host = host;
00095                 hostent* hoste = gethostbyname(host.c_str());
00096                 if (!hoste) {
00097                         ip = (char*)host.c_str();
00098                 } else {
00099                         struct in_addr* ia = (in_addr*)hoste->h_addr;
00100                         ip = inet_ntoa(*ia);
00101                 }
00102 
00103                 this->IP = ip;
00104 
00105                 timeout_end = time(NULL)+maxtime;
00106                 timeout = false;
00107                 if ((this->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
00108                 {
00109                         this->state = I_ERROR;
00110                         this->OnError(I_ERR_SOCKET);
00111                         return;
00112                 }
00113                 this->port = port;
00114                 inet_aton(ip,&addy);
00115                 addr.sin_family = AF_INET;
00116                 addr.sin_addr = addy;
00117                 addr.sin_port = htons(this->port);
00118 
00119                 int flags;
00120                 flags = fcntl(this->fd, F_GETFL, 0);
00121                 fcntl(this->fd, F_SETFL, flags | O_NONBLOCK);
00122 
00123                 if(connect(this->fd, (sockaddr*)&this->addr,sizeof(this->addr)) == -1)
00124                 {
00125                         if (errno != EINPROGRESS)
00126                         {
00127                                 this->Close();
00128                                 this->OnError(I_ERR_CONNECT);
00129                                 this->state = I_ERROR;
00130                                 return;
00131                         }
00132                 }
00133                 this->state = I_CONNECTING;
00134                 SE->AddFd(this->fd,false,X_ESTAB_MODULE);
00135                 return;
00136         }
00137 }
00138 
00139 void InspSocket::Close()
00140 {
00141         if (this->fd != -1)
00142         {
00143                 this->OnClose();
00144                 shutdown(this->fd,2);
00145                 close(this->fd);
00146                 this->fd = -1;
00147         }
00148 }
00149 
00150 std::string InspSocket::GetIP()
00151 {
00152         return this->IP;
00153 }
00154 
00155 char* InspSocket::Read()
00156 {
00157         int n = recv(this->fd,this->ibuf,sizeof(this->ibuf),0);
00158         if (n > 0)
00159         {
00160                 ibuf[n] = 0;
00161                 return ibuf;
00162         }
00163         else
00164         {
00165                 log(DEBUG,"EOF or error on socket");
00166                 return NULL;
00167         }
00168 }
00169 
00170 // There are two possible outcomes to this function.
00171 // It will either write all of the data, or an undefined amount.
00172 // If an undefined amount is written the connection has failed
00173 // and should be aborted.
00174 int InspSocket::Write(std::string data)
00175 {
00176         char* d = (char*)data.c_str();
00177         unsigned int written = 0;
00178         int n = 0;
00179         int s = data.length();
00180         while ((written < data.length()) && (n >= 0))
00181         {
00182                 n = send(this->fd,d,s,0);
00183                 if (n > 0)
00184                 {
00185                         // If we didnt write everything, advance
00186                         // the pointers so that when we retry
00187                         // the next time around the loop, we try
00188                         // to write what we failed to write before.
00189                         written += n;
00190                         s -= n;
00191                         d += n;
00192                 }
00193         }
00194         return written;
00195 }
00196 
00197 bool InspSocket::Timeout(time_t current)
00198 {
00199         if ((this->state == I_CONNECTING) && (current > timeout_end))
00200         {
00201                 // for non-listening sockets, the timeout can occur
00202                 // which causes termination of the connection after
00203                 // the given number of seconds without a successful
00204                 // connection.
00205                 this->OnTimeout();
00206                 this->OnError(I_ERR_TIMEOUT);
00207                 timeout = true;
00208                 this->state = I_ERROR;
00209                 return true;
00210         }
00211         return false;
00212 }
00213 
00214 bool InspSocket::Poll()
00215 {
00216         int incoming = -1;
00217         
00218         switch (this->state)
00219         {
00220                 case I_CONNECTING:
00221                         this->SetState(I_CONNECTED);
00222                         /* Our socket was in write-state, so delete it and re-add it
00223                          * in read-state.
00224                          */
00225                         SE->DelFd(this->fd);
00226                         SE->AddFd(this->fd,true,X_ESTAB_MODULE);
00227                         return this->OnConnected();
00228                 break;
00229                 case I_LISTENING:
00230                         length = sizeof (client);
00231                         incoming = accept (this->fd, (sockaddr*)&client,&length);
00232                         this->OnIncomingConnection(incoming,inet_ntoa(client.sin_addr));
00233                         return true;
00234                 break;
00235                 case I_CONNECTED:
00236                         return this->OnDataReady();
00237                 break;
00238                 default:
00239                 break;
00240         }
00241 
00242         return true;
00243 }
00244 
00245 void InspSocket::SetState(InspSocketState s)
00246 {
00247         log(DEBUG,"Socket state change");
00248         this->state = s;
00249 }
00250 
00251 InspSocketState InspSocket::GetState()
00252 {
00253         return this->state;
00254 }
00255 
00256 int InspSocket::GetFd()
00257 {
00258         return this->fd;
00259 }
00260 
00261 bool InspSocket::OnConnected() { return true; }
00262 void InspSocket::OnError(InspSocketError e) { return; }
00263 int InspSocket::OnDisconnect() { return 0; }
00264 int InspSocket::OnIncomingConnection(int newfd, char* ip) { return 0; }
00265 bool InspSocket::OnDataReady() { return true; }
00266 void InspSocket::OnTimeout() { return; }
00267 void InspSocket::OnClose() { return; }
00268 
00269 InspSocket::~InspSocket()
00270 {
00271         this->Close();
00272 }
00273 
00274 /*
00275 int BindSocket (int sockfd, struct sockaddr_in client, struct sockaddr_in server, int port, char* addr)
00276 int OpenTCPSocket (void)
00277 */

Generated on Mon Dec 12 18:30:58 2005 for InspIRCd by  doxygen 1.4.4-20050815