50ef39af82
When invoking several copies of m5 on the same machine at the same time, there can be a race for TCP ports for the terminal connections or remote gdb. Expose a function to disable those ports, and have the regression scripts disable them. There are some SimObjects that have no other function than to be used with ports (NativeTrace and EtherTap), so they will panic if the ports are disabled.
132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Nathan Binkert
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <errno.h>
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#include <unistd.h>
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#include "sim/host.hh"
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#include "base/misc.hh"
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#include "base/socket.hh"
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using namespace std;
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bool ListenSocket::listeningDisabled = false;
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bool ListenSocket::anyListening = false;
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void
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ListenSocket::disableAll()
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{
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if (anyListening)
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panic("Too late to disable all listeners, already have a listener");
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listeningDisabled = true;
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}
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bool
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ListenSocket::allDisabled()
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{
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return listeningDisabled;
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}
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////////////////////////////////////////////////////////////////////////
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//
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//
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ListenSocket::ListenSocket()
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: listening(false), fd(-1)
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{}
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ListenSocket::~ListenSocket()
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{
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if (fd != -1)
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close(fd);
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}
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// Create a socket and configure it for listening
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bool
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ListenSocket::listen(int port, bool reuse)
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{
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if (listening)
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panic("Socket already listening!");
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fd = ::socket(PF_INET, SOCK_STREAM, 0);
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if (fd < 0)
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panic("Can't create socket:%s !", strerror(errno));
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if (reuse) {
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int i = 1;
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if (::setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&i,
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sizeof(i)) < 0)
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panic("ListenSocket(listen): setsockopt() SO_REUSEADDR failed!");
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}
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struct sockaddr_in sockaddr;
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_addr.s_addr = INADDR_ANY;
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sockaddr.sin_port = htons(port);
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int ret = ::bind(fd, (struct sockaddr *)&sockaddr, sizeof (sockaddr));
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if (ret != 0) {
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if (ret == -1 && errno != EADDRINUSE)
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panic("ListenSocket(listen): bind() failed!");
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return false;
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}
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if (::listen(fd, 1) == -1)
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panic("ListenSocket(listen): listen() failed!");
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listening = true;
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anyListening = true;
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return true;
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}
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// Open a connection. Accept will block, so if you don't want it to,
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// make sure a connection is ready before you call accept.
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int
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ListenSocket::accept(bool nodelay)
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{
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struct sockaddr_in sockaddr;
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socklen_t slen = sizeof (sockaddr);
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int sfd = ::accept(fd, (struct sockaddr *)&sockaddr, &slen);
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if (sfd != -1 && nodelay) {
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int i = 1;
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::setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, (char *)&i, sizeof(i));
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}
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return sfd;
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}
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