drivers/can_tcp_win32/Socket.cpp
author Christian Taedcke <Christian.Taedcke@ica-traffic.de>
Fri, 19 Feb 2010 08:18:40 +0100
changeset 639 27c0a025acf3
parent 355 12adbd08e10c
permissions -rwxr-xr-x
CHANGED: - if variable starts with a digit, add a "_" at the beginning
* * *
FIXED: - if callback array name starts with a digit, prepend "_"
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/* 
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   Socket.cpp
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   Copyright (C) 2002-2004 René Nyffenegger
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   This source code is provided 'as-is', without any express or implied
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   warranty. In no event will the author be held liable for any damages
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   arising from the use of this software.
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   Permission is granted to anyone to use this software for any purpose,
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   including commercial applications, and to alter it and redistribute it
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   freely, subject to the following restrictions:
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   1. The origin of this source code must not be misrepresented; you must not
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      claim that you wrote the original source code. If you use this source code
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      in a product, an acknowledgment in the product documentation would be
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      appreciated but is not required.
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   2. Altered source versions must be plainly marked as such, and must not be
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      misrepresented as being the original source code.
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   3. This notice may not be removed or altered from any source distribution.
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   René Nyffenegger rene.nyffenegger@adp-gmbh.ch
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*/
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#include "Socket.h"
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#include <iostream>
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using namespace std;
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int Socket::nofSockets_= 0;
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void Socket::Start() {
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  if (!nofSockets_) {
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    WSADATA info;
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    if (WSAStartup(MAKEWORD(2,0), &info)) {
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      throw "Could not start WSA";
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    }
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  }
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  ++nofSockets_;
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}
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void Socket::End() {
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  WSACleanup();
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}
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Socket::Socket() : s_(0) {
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  Start();
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  // UDP: use SOCK_DGRAM instead of SOCK_STREAM
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  s_ = socket(AF_INET,SOCK_STREAM,0);
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  if (s_ == INVALID_SOCKET) {
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    throw "INVALID_SOCKET";
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  }
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  refCounter_ = new int(1);
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}
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Socket::Socket(SOCKET s) : s_(s) {
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  Start();
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  refCounter_ = new int(1);
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};
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Socket::~Socket() {
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  if (! --(*refCounter_)) {
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    Close();
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    delete refCounter_;
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  }
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  --nofSockets_;
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  if (!nofSockets_) End();
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}
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Socket::Socket(const Socket& o) {
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  refCounter_=o.refCounter_;
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  (*refCounter_)++;
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  s_         =o.s_;
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  nofSockets_++;
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}
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Socket& Socket::operator=(Socket& o) {
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  (*o.refCounter_)++;
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  refCounter_=o.refCounter_;
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  s_         =o.s_;
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  nofSockets_++;
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  return *this;
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}
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void Socket::Close() {
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  closesocket(s_);
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}
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std::string Socket::ReceiveBytes() {
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  std::string ret;
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  char buf[1024];
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  while (1) {
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    u_long arg = 0;
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    if (ioctlsocket(s_, FIONREAD, &arg) != 0)
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      break;
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    if (arg == 0)
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      break;
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    if (arg > 1024) arg = 1024;
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    int rv = recv (s_, buf, arg, 0);
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    if (rv <= 0) break;
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    std::string t;
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    t.assign (buf, rv);
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    ret += t;
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  }
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  return ret;
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}
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std::string Socket::ReceiveLine() {
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  std::string ret;
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  while (1) {
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    char r;
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    switch(recv(s_, &r, 1, 0)) {
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      case 0: // not connected anymore;
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              // ... but last line sent
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              // might not end in \n,
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              // so return ret anyway.
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        return ret;
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      case -1:
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        return "";
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//      if (errno == EAGAIN) {
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//        return ret;
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//      } else {
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//      // not connected anymore
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//      return "";
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//      }
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    }
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    if (r == '\n')  return ret;
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    ret += r;
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  }
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}
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void Socket::SendLine(std::string s) {
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  s += '\n';
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  send(s_,s.c_str(),s.length(),0);
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}
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void Socket::SendBytes(const std::string& s) {
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  send(s_,s.c_str(),s.length(),0);
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}
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SocketServer::SocketServer(int port, int connections, TypeSocket type) {
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  sockaddr_in sa;
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  memset(&sa, 0, sizeof(sa));
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  sa.sin_family = PF_INET;             
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  sa.sin_port = htons(port);          
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  s_ = socket(AF_INET, SOCK_STREAM, 0);
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  if (s_ == INVALID_SOCKET) {
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    throw "INVALID_SOCKET";
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  }
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  if(type==NonBlockingSocket) {
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    u_long arg = 1;
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    ioctlsocket(s_, FIONBIO, &arg);
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  }
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  /* bind the socket to the internet address */
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  if (bind(s_, (sockaddr *)&sa, sizeof(sockaddr_in)) == SOCKET_ERROR) {
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    closesocket(s_);
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    throw "INVALID_SOCKET";
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  }
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  listen(s_, connections);                               
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}
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Socket* SocketServer::Accept() {
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  SOCKET new_sock = accept(s_, 0, 0);
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  if (new_sock == INVALID_SOCKET) {
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    int rc = WSAGetLastError();
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    if(rc==WSAEWOULDBLOCK) {
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      return 0; // non-blocking call, no request pending
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    }
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    else {
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      throw "Invalid Socket";
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   195
    }
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  }
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  Socket* r = new Socket(new_sock);
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  return r;
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}
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SocketClient::SocketClient(const std::string& host, int port) : Socket() {
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  std::string error;
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  hostent *he;
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  if ((he = gethostbyname(host.c_str())) == 0) {
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    error = strerror(errno);
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    throw error;
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  }
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  sockaddr_in addr;
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  addr.sin_family = AF_INET;
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  addr.sin_port = htons(port);
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  addr.sin_addr = *((in_addr *)he->h_addr);
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  memset(&(addr.sin_zero), 0, 8); 
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  if (::connect(s_, (sockaddr *) &addr, sizeof(sockaddr))) {
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    error = strerror(WSAGetLastError());
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    throw error;
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  }
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}
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   223
SocketSelect::SocketSelect(Socket const * const s1, Socket const * const s2, TypeSocket type) {
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  FD_ZERO(&fds_);
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  FD_SET(const_cast<Socket*>(s1)->s_,&fds_);
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  if(s2) {
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    FD_SET(const_cast<Socket*>(s2)->s_,&fds_);
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  }     
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   229
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  TIMEVAL tval;
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   231
  tval.tv_sec  = 0;
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  tval.tv_usec = 1;
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   233
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  TIMEVAL *ptval;
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   235
  if(type==NonBlockingSocket) {
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    ptval = &tval;
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   237
  }
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   238
  else { 
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    ptval = 0;
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   240
  }
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  if (select (0, &fds_, (fd_set*) 0, (fd_set*) 0, ptval) == SOCKET_ERROR) 
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   243
    throw "Error in select";
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   244
}
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   245
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bool SocketSelect::Readable(Socket const* const s) {
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  if (FD_ISSET(s->s_,&fds_)) return true;
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  return false;
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}