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/*
* Copyright (c) 2020 The Regents of the University of California
* All rights reserved
*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Nathan Binkert
* Bobby R. Bruce
*/
#include "base/socket.hh"
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <cerrno>
#include "base/logging.hh"
#include "base/types.hh"
#include "sim/byteswap.hh"
using namespace std;
bool ListenSocket::listeningDisabled = false;
bool ListenSocket::anyListening = false;
bool ListenSocket::bindToLoopback = false;
void
ListenSocket::cleanup()
{
listeningDisabled = false;
anyListening = false;
bindToLoopback = false;
}
void
ListenSocket::disableAll()
{
if (anyListening)
panic("Too late to disable all listeners, already have a listener");
listeningDisabled = true;
}
bool
ListenSocket::allDisabled()
{
return listeningDisabled;
}
void
ListenSocket::loopbackOnly()
{
if (anyListening)
panic("Too late to bind to loopback, already have a listener");
bindToLoopback = true;
}
////////////////////////////////////////////////////////////////////////
//
//
ListenSocket::ListenSocket()
: listening(false), fd(-1)
{}
ListenSocket::~ListenSocket()
{
if (fd != -1)
close(fd);
}
// Create a socket and configure it for listening
bool
ListenSocket::listen(int port, bool reuse)
{
if (listening)
panic("Socket already listening!");
fd = ::socket(PF_INET, SOCK_STREAM, 0);
if (fd < 0)
panic("Can't create socket:%s !", strerror(errno));
if (reuse) {
int i = 1;
if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&i,
sizeof(i)) < 0)
panic("ListenSocket(listen): setsockopt() SO_REUSEADDR failed!");
}
struct sockaddr_in sockaddr;
sockaddr.sin_family = PF_INET;
sockaddr.sin_addr.s_addr =
htobe<in_addr_t>(bindToLoopback ? INADDR_LOOPBACK : INADDR_ANY);
sockaddr.sin_port = htons(port);
// finally clear sin_zero
memset(&sockaddr.sin_zero, 0, sizeof(sockaddr.sin_zero));
int ret = ::bind(fd, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
if (ret != 0) {
if (ret == -1 && errno != EADDRINUSE)
panic("ListenSocket(listen): bind() failed!");
return false;
}
if (::listen(fd, 1) == -1) {
if (errno != EADDRINUSE)
panic("ListenSocket(listen): listen() failed!");
return false;
}
listening = true;
anyListening = true;
return true;
}
// Open a connection. Accept will block, so if you don't want it to,
// make sure a connection is ready before you call accept.
int
ListenSocket::accept(bool nodelay)
{
struct sockaddr_in sockaddr;
socklen_t slen = sizeof (sockaddr);
int sfd = ::accept(fd, (struct sockaddr *)&sockaddr, &slen);
if (sfd != -1 && nodelay) {
int i = 1;
if (::setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (char *)&i,
sizeof(i)) < 0)
warn("ListenSocket(accept): setsockopt() TCP_NODELAY failed!");
}
return sfd;
}
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