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/*
* Copyright (c) 2015 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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: Gabor Dozsa
*/
/* @file
* TCP stream socket based interface class implementation for multi gem5 runs.
*/
#include "dev/tcp_iface.hh"
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include <cerrno>
#include <cstring>
#include "base/types.hh"
#include "debug/MultiEthernet.hh"
// MSG_NOSIGNAL does not exists on OS X
#if defined(__APPLE__) || defined(__MACH__)
#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL SO_NOSIGPIPE
#endif
#endif
using namespace std;
vector<int> TCPIface::sockRegistry;
TCPIface::TCPIface(string server_name, unsigned server_port,
unsigned multi_rank, Tick sync_start, Tick sync_repeat,
EventManager *em) :
MultiIface(multi_rank, sync_start, sync_repeat, em)
{
struct addrinfo addr_hint, *addr_results;
int ret;
string port_str = to_string(server_port);
sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
panic_if(sock < 0, "socket() failed: %s", strerror(errno));
bzero(&addr_hint, sizeof(addr_hint));
addr_hint.ai_family = AF_INET;
addr_hint.ai_socktype = SOCK_STREAM;
addr_hint.ai_protocol = IPPROTO_TCP;
ret = getaddrinfo(server_name.c_str(), port_str.c_str(),
&addr_hint, &addr_results);
panic_if(ret < 0, "getaddrinf() failed: %s", strerror(errno));
DPRINTF(MultiEthernet, "Connecting to %s:%u\n",
server_name.c_str(), port_str.c_str());
ret = ::connect(sock, (struct sockaddr *)(addr_results->ai_addr),
addr_results->ai_addrlen);
panic_if(ret < 0, "connect() failed: %s", strerror(errno));
freeaddrinfo(addr_results);
// add our socket to the static registry
sockRegistry.push_back(sock);
// let the server know who we are
sendTCP(sock, &multi_rank, sizeof(multi_rank));
}
TCPIface::~TCPIface()
{
int M5_VAR_USED ret;
ret = close(sock);
assert(ret == 0);
}
void
TCPIface::sendTCP(int sock, void *buf, unsigned length)
{
ssize_t ret;
ret = ::send(sock, buf, length, MSG_NOSIGNAL);
panic_if(ret < 0, "send() failed: %s", strerror(errno));
panic_if(ret != length, "send() failed");
}
bool
TCPIface::recvTCP(int sock, void *buf, unsigned length)
{
ssize_t ret;
ret = ::recv(sock, buf, length, MSG_WAITALL );
if (ret < 0) {
if (errno == ECONNRESET || errno == EPIPE)
inform("recv(): %s", strerror(errno));
else if (ret < 0)
panic("recv() failed: %s", strerror(errno));
} else if (ret == 0) {
inform("recv(): Connection closed");
} else if (ret != length)
panic("recv() failed");
return (ret == length);
}
void
TCPIface::syncRaw(MultiHeaderPkt::MsgType sync_req, Tick sync_tick)
{
/*
* Barrier is simply implemented by point-to-point messages to the server
* for now. This method is called by only one TCPIface object.
* The server will send back an 'ack' message when it gets the
* sync request from all clients.
*/
MultiHeaderPkt::Header header_pkt;
header_pkt.msgType = sync_req;
header_pkt.sendTick = sync_tick;
for (auto s : sockRegistry)
sendTCP(s, (void *)&header_pkt, sizeof(header_pkt));
}
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